阅读说明：本技术 升降台 (Lifting platform ) 是由 须藤二三男 于 2021-05-26 设计创作，主要内容包括：提供一种升降台,采用可调整顶板高度的升降台中使用的支柱的长度变更机构,在尽可能简单地构成结构的同时,通常可通过一个用户的简单操作来进行顶板的倾斜调整。升降台(1)具有：顶板(2)、具有支柱(5)和脚部(6)的多个腿单元(U1～U4)。多个腿单元(U1～U4)被分成：沿着顶板(2)的一方的长边缘(a)的第1腿单元组(G1)和沿着另一方的长边缘(a)的第2腿单元组(G2)。通过分别操作对应于第1腿单元组(G1)而设置的第1操作部(301)和对应于第2腿单元组(G2)而设置的第2操作部(302),可分别变更属于第1腿单元组(G1)和第2腿单元组(G2)的支柱(5)的长度,由此,使顶板(2)相对一方侧向另一方侧倾斜。(Provided is an elevating platform, which adopts a length changing mechanism of a support used in the elevating platform capable of adjusting the height of a top plate, and can adjust the inclination of the top plate through simple operation of one user while the structure is as simple as possible. The elevating platform (1) is provided with: a top plate (2), and a plurality of leg units (U1-U4) having a support column (5) and a foot section (6). The plurality of leg units (U1-U4) are divided into: a1 st leg unit group (G1) is provided along one long edge (a) of the top plate (2), and a 2 nd leg unit group (G2) is provided along the other long edge (a). By operating the 1 st operation part (301) provided corresponding to the 1 st leg unit group (G1) and the 2 nd operation part (302) provided corresponding to the 2 nd leg unit group (G2), respectively, the lengths of the support columns (5) belonging to the 1 st leg unit group (G1) and the 2 nd leg unit group (G2) can be changed, respectively, thereby tilting the top plate (2) from one side to the other side.)

1. An elevating platform comprises a top plate, a plurality of leg units and a plurality of operation parts,

the plurality of leg units each having an upper end portion and a lower end portion, the length of a direction connecting the upper end portion and the lower end portion being changeable, and having a stay in which the upper end portion is connected to the top plate and a foot portion connected to the lower end portion of the stay and seated on a floor,

the length of the stay of the plurality of leg units can be changed by the operation of any one of the plurality of operating portions described above,

the plurality of leg units belong to any one of a 1 st leg unit group and a 2 nd leg unit group, the 1 st leg unit group includes one or more leg units and is disposed on one side of the top plate, the 2 nd leg unit group includes one or more leg units and is disposed on the other side of the top plate,

the operation unit includes a 1 st operation unit for changing the length of the strut of the leg unit belonging to the 1 st leg unit group, and a 2 nd operation unit that is operable independently of the 1 st operation unit and changes the length of the strut of the leg unit belonging to the 2 nd leg unit group.

2. The lift table of claim 1, wherein in each leg unit, the foot comprises: a leg body portion attached to the pillar and extending in a longitudinal direction connecting the one side and the other side of the top plate; and a plurality of foot rest portions that are provided at intervals in the longitudinal direction with respect to the foot main body portion and that seat on the floor.

3. The lift table of claim 2, wherein said foot body portion of said foot is fixedly mounted to said post,

the foot falling part of the foot part is installed relative to the foot main body part in a mode that the protruding height relative to the direction of the floor can be changed,

the height of the foot falling part protruding relative to the foot main body part can be changed according to the height corresponding to the inclination angle of the top plate.

4. The elevating platform according to claim 2, wherein the foot main body is attached to a lower end portion of the column so as to be capable of changing an attachment angle,

the angle of attachment of the leg main body portion to the pillar is changed in accordance with the inclination angle of the top plate.

5. The elevating platform according to any one of claims 1 to 4, characterized in that the 1 st leg unit group belongs to two or more leg units, and the 2 nd leg unit group belongs to two or more leg units,

the struts of the leg units belonging to the 1 st leg unit group are arranged in a common 1 st strut arrangement plane, and the struts of the leg units belonging to the 2 nd leg unit group are arranged in a common 2 nd strut arrangement plane,

the 1 st pillar arrangement surface and the 2 nd pillar arrangement surface are parallel to each other.

6. The elevating platform according to any one of claims 1 to 5, wherein the leg portions attached to the column of the leg unit belonging to the 1 st leg unit group and the leg portions attached to the column of the leg unit belonging to the 1 st leg unit group are connected by a connecting member in a state where relative positional changes of both the leg portions according to the inclination of the top plate are absorbed.

7. The elevating platform as claimed in any one of claims 1 to 5, wherein the leg units comprise at least four leg units respectively arranged corresponding to four vertices of a parallelogram,

the one side and the other side of the top plate are each one side and the other side of two sets of opposing sides of the parallelogram,

the two sets of sides of the top plate are provided in such a manner that the foot unit is defined as the 1 st leg unit group and the 2 nd leg unit group, and the operation unit is provided with the 1 st operation unit and the 2 nd operation unit.

8. The lift table of claim 7, wherein said leg units both connect said upper end of said post with said top plate, thereby comprising a top plate support structure mounted on said top plate and said upper end of said post,

in the top plate support structure corresponding to the four leg units, the operation portions extend from any one of the operation portions in one of the groups and from any one of the operation portions in the other group,

the length of the column to which the upper end portion is attached to the top plate supporting structure can be changed by operating any one of the operating portions.

9. The elevating platform according to any one of claims 1 to 7, wherein the leg portion is rotatably attached to the column so that a direction in which the leg portion main body extends follows the inclination direction, in accordance with the selected inclination direction.

10. The elevating platform according to any one of claims 1 to 8, wherein the height of the top plate is changed by changing the length of the column of the leg unit belonging to the 1 st leg unit group and the length of the column of the leg unit belonging to the 2 nd leg unit group to the same length.

Technical Field

The present invention relates to an elevating platform including a top plate, a plurality of legs for supporting the top plate and varying a height thereof according to an operation, and a leg portion connected to a lower end portion of the leg for supporting the leg on a floor surface.

Background

Conventionally, there has been proposed an apparatus such as an office desk, furniture, a setting table, and an elevating table (hereinafter, collectively referred to as "elevating table" in the present specification) including: a top plate on which an object is placed or various operations are performed; one or more support columns for supporting the top plate, wherein the top surface height of the top plate can be appropriately changed by a user to properly set and operate the article, and therefore, the height adjusting device for adjusting the height of the top plate is provided.

In a single chair such as an office chair or an elevating platform having a relatively small top plate area for a single person or for small article display, there has been conventionally proposed an elevating device in which a seat surface and a top plate of the chair are supported by a single support, and the length of the support, that is, the height of the seat surface and the height of the top plate are changed and adjusted by operating a gas spring (also referred to as a "cylinder piston") provided in the support. In the lifting device having such a chair or a lifting table, the column is formed in a telescopic manner by a cylindrical outer column and an inner column loosely inserted therein. The inner and outer struts are fixed with respective end portions of the gas spring, and are guided in the telescopic direction by the engagement between the ribs and the grooves of the inner and outer struts, whereby the rotation of the top plate relative to the struts is stopped by making the inner and outer struts unable to rotate relative to each other, and the height adjustment of the top plate becomes possible according to the telescopic action of the gas spring.

On the other hand, in the case of a lifting table having a corresponding ceiling area, the ceiling is generally supported by a plurality of two or more support columns to which gas springs are attached on at least either the left side or the right side of the lifting table, for example (refer to patent document 1). The height adjusting device for the top plate has a special structure in which the lower end of a gas spring of a special structure is rotatably supported, and a support rod, a link rod, a roller, and the like are provided between the upper end of the gas spring and the elevating table. The operation of the above-described structure is linked to the structure on the other column side by a shaft member in adjusting the upward thrust by changing the position of the upper end of the gas spring on one column. The adjustment of the height of the top plate is performed by operating gas springs provided on at least either of the left and right sides of the elevating table by pedals, but when the gas springs are provided on the two support columns, respectively, there is no disclosure as to how to coordinate the adjustment of the two gas springs.

As an example of a height adjusting device for a top plate supported by two supports, there is a structure in which the lengths of the two supports can be simultaneously changed and adjusted by one operation (patent document 2). The height adjusting device of the top plate is characterized in that lifting support columns vertically arranged on two sides of the top plate of the table are arranged in a foot support column of the table in a mode of freely lifting and being incapable of moving back and forth, the two lifting support columns are linked with a chain, the chain is connected to a plurality of pulleys mounted on an immovable component shaft of the table, a rocking plate is pivotally arranged on the immovable component of the table, the chain is connected to the rocking plate, a screw shaft facing to the vertical direction is pivotally arranged on the rocking plate in a mode of not moving up and down, a rockable component shaft is mounted on one end shaft of the immovable component of the table, and the other end shaft of a gas spring is mounted on an adjusting metal fitting in threaded connection with the screw shaft. In the lifting table for supporting the top plate by a plurality of support columns, in order to move the top plate up and down smoothly in coordination with all the support columns, it is necessary to coordinate the timing of starting and ending the height adjusting operation of the support columns and the operation amount of the height adjusting operation. In the height adjusting mechanism of the top plate disclosed in patent document 2, it requires a link mechanism having a complicated structure for the coordinated operation, and therefore, man-hours are required for manufacturing, assembling, and adjusting, which is a cause of increasing the cost.

Further, there is proposed an elevating table in which the height and front-rear position of a top plate are changed according to the inclined state of a back portion of a chair in a combination of the chair and the elevating table (patent document 3). The lifting platform is formed by respectively bending two metal round pipes into a overlooking U shape and an inverted U shape, the two metal round pipes are provided with two support legs connected by a plurality of connecting pieces, and two support columns supporting a top plate are respectively and rotatably supported relative to the support legs through connecting units. The connection unit enables the two struts to be respectively rotatable between a forward-leaning position and a backward-leaning position for mounting across the legs. Even if the two support columns are rotated between the forward-inclined position and the backward-inclined position, the top plate of the lift table is allowed to move obliquely backward and downward in accordance with the inclination of the chair because the top plate can move in parallel while maintaining the horizontal state.

Further, a work table in which the positions of a display and a keyboard are changed according to the posture of a user such as a computer sitting on a chair has been proposed (patent document 4). Even if the support arm is inclined corresponding to the leg portion, the holding portion moves in parallel while maintaining the horizontal state. The keyboard base is supported with respect to the holding portion, and the elevation angle of the keyboard can be adjusted by tilting the keyboard base with respect to the holding portion. In this work table, the keyboard base is not directly supported by the support arm. Further, adjustment of the elevation angle of the keyboard base requires a separate structure, and the detailed structure is not disclosed in patent document 4.

The present applicant has proposed an elevating platform having a top plate and a height adjusting device having two or three legs whose length can be changed to support the top plate (patent document 5). Each of the columns includes a gas spring used for a chair or the like, and the length of the gas spring is changed by pressing a push valve provided at an upper end of the column, whereby the length of the column can be changed. In general, a structure is considered in which two gas springs are operated simultaneously by operating a single operating rod, but manufacturing errors and assembly errors of these components inevitably occur in the components constituting the path from the operating rod to the pusher valve. In each type of the elevating table, it is extremely difficult to adjust the balance between such an error and the rigidity of the operation rod, which is a cause of deformation and skew generated during the operation of the operation rod. That is, if the rigidity of the operation rod is too high, an error appears as a difference in timing for pressing the pusher valve, and if the rigidity of the operation rod is too low, the operation amount of the operation rod is deformed and skewed, and the timing for pushing the pusher valve is not accurate, and a sufficient pushing amount of the pusher valve cannot be secured.

Therefore, in the lifting platform provided with the height adjusting device, although the operation performed by the user is one operation in order to adjust the height of the top plate, the operation is coordinated with any gas spring, and the invention proposes improvement of operability in adjusting the height of the lifting platform by changing the lengths of all the support columns. That is, a gap is intentionally provided in the operation path of the pusher valve from one handle to each strut, and when the handle is operated, after all the gaps are absorbed, the pushing operation of all the pusher valves is started, so that all the struts obtain the height adjustment operation in coordination with the timing and the operation amount.

In the elevating platform for performing the height adjustment, there is no disclosure that the top plate is set to an arbitrary inclination angle, or that there is no intention of such setting. In addition, in a form in which the top plate is inclined with respect to the plurality of columns to change the position of the elevating platform, the columns are formed as parallel links in many cases, and the top plate moves in parallel. On the other hand, as a clear example, the top plate may be inclined rather than horizontal depending on the operation contents on the elevating platform, as in a drawing work table, a reading table, or a display table/showcase for goods or articles. In order to tilt the top plate with respect to the support column that moves the parallel link, a mechanism for tilting the top plate and maintaining the tilted state between the top plate and the top plate support section provided above the support column is required, and the structure of the support column upper section and the top plate support section has to be complicated.

[ Prior art documents ]

[ patent document ]

[ patent document 1] Japanese patent application laid-open No. 11-127964

[ patent document 2] Japanese patent application laid-open No. 10-262741

[ patent document 3] Japanese patent No. 4364981

[ patent document 4] Japanese patent No. 3642391 publication

[ patent document 5] Japanese patent application laid-open No. 2017-029453

Disclosure of Invention

[ problems to be solved by the invention ]

Therefore, the present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide an elevating platform including a top plate, a plurality of support columns for supporting the top plate and capable of changing the height thereof according to an operation, and a leg portion connected to a lower end portion of the support column for supporting the top plate and the support column on the ground, wherein the height and the inclination of the top plate can be selectively adjusted or both can be easily adjusted.

The invention provides an elevating platform, which uses a pillar length changing mechanism for a pillar used by the elevating platform capable of adjusting the height of a top plate, and has a simple structure, and can be adjusted selectively or easily for the height and the inclination of the top plate by one user.

[ means for solving problems ]

The elevating platform of the invention comprises a top plate, a plurality of leg units and a plurality of operation parts.

The plurality of leg units each having an upper end portion and a lower end portion, the length of a direction connecting the upper end portion and the lower end portion being changeable, and having a stay in which the upper end portion is connected to the top plate and a foot portion connected to the lower end portion of the stay and seated on a floor,

the length of the stay of the plurality of leg units can be changed by the operation of any one of the plurality of operating portions described above,

the plurality of leg units belong to any one of a 1 st leg unit group and a 2 nd leg unit group, the 1 st leg unit group includes one or more leg units and is disposed on one side of the top plate, the 2 nd leg unit group includes one or more leg units and is disposed on the other side of the top plate,

the operation unit includes a 1 st operation unit for changing the length of the strut of the leg unit belonging to the 1 st leg unit group, and a 2 nd operation unit that is operable independently of the 1 st operation unit and changes the length of the strut of the leg unit belonging to the 2 nd leg unit group.

As a basic structure, the lift table has a top plate, a plurality of leg units of a column and a leg, and a plurality of operating portions, and a load of the top plate (including a weight carried on the top plate) is supported on a floor by the leg through the column. The stay and the foot constitute leg units, and a plurality of leg units belong to either one of the 1 st leg unit group arranged on one side of the top plate and the 2 nd leg unit group arranged on the other side of the top plate. That is, any stay also belongs to only either one of the 1 st leg unit group and the 2 nd leg unit group, and here, it does not repeatedly belong to both side leg unit groups. In addition, the leg unit belonging to any leg unit group does not exist. The length of the stay of the leg unit belonging to the 1 st leg unit group is changed by operating the 1 st operating portion, and the length of the stay of the leg unit belonging to the 2 nd leg unit group is changeable by the operation of the 2 nd operating portion. Since the lengths of the struts of the leg units belonging to the 1 st leg unit group and the lengths of the struts of the leg units belonging to the 2 nd leg unit group are changed independently by operating the 1 st operating part and the 2 nd operating part, respectively, the height of the top plate can be changed when the length of the strut of the leg unit belonging to one leg unit group and the length of the strut of the leg unit belonging to the 2 nd leg unit group are changed to different lengths, or when the top plate is inclined relative to the other side with respect to one side, or when the height of the top plate is changed while the top plate is inclined, and the lengths of the leg unit groups are changed to the same length. Further, since the operation portion is divided into two operation portions, i.e., the 1 st operation portion and the 2 nd operation portion, the height and the inclination of the top panel can be adjusted by operating each operation portion with both hands even if a user is a single person in a case where the size of the top panel is relatively narrow, and the height and the inclination of the top panel can be adjusted by operating the operation portion on each side by two persons in a case where the width of the top panel is wide.

In the elevating platform, the leg portion of each leg unit may include: a leg body portion attached to the pillar and extending in a longitudinal direction connecting the one side and the other side of the top plate; and a plurality of foot rest portions that are provided at intervals in the longitudinal direction with respect to the foot main body portion and that seat on the floor.

When the top plate is in an inclined state in which the other side is inclined with respect to the one side, the center of gravity of the elevating platform moves in the inclined direction, and imbalance occurs in the balance of the load. Moment acts in a direction to tilt in a direction inclined to a direction of connection between one side and the other side of the top plate on the lifting table. By providing the landing leg portions to be seated on the floor of each leg portion at intervals in the oblique direction, even if such an overturning moment occurs, the resistance against the overturning moment by the reaction force from the floor to the landing leg portions becomes easy to obtain, and the resistance against the overturning of the elevating platform can be improved.

In the elevating platform, the leg main body portion of the leg portion is fixedly attached to the column, the leg drop portion of the leg portion is attached to the leg main body portion so that a projection height of the leg drop portion with respect to the floor direction can be changed, and the projection height of the leg drop portion with respect to the leg main body portion can be changed in accordance with a height corresponding to an inclination angle of the top plate.

Since the foot main body portion is fixedly attached to the stay, when the top plate and the stay are inclined, the foot main body portion is also inclined together with the stay. Since the height of the foot falling portion projecting in the floor direction from the foot main body portion is variably attached, even if the foot main body portion is inclined in accordance with the inclination of the top plate, any foot falling portion can be seated on the floor in the original seating form by adjusting the height of the foot falling portion projecting in the floor direction, and the load of the elevating platform can be transmitted to the floor.

In this case, each of the foot portions includes a joint structure such as a ball joint, and even if the foot main body portion is inclined together with the pillar, each of the foot portions can be seated on the ground in an original state.

In the elevating platform, the leg main body portion is attached to a lower end portion of the support column so as to be capable of changing an attachment angle, and the leg main body portion is attached to the support column so as to be capable of changing an angle according to an inclination angle of the top plate.

Since the mounting angle of the foot main body portion to the lower end portion of the pillar can be changed, even if the pillar is inclined in response to the inclination of the top plate, the mounting angle of the foot main body portion to the pillar is changed in response to the inclination, and therefore, any foot-falling portion can be seated on the floor in the original seated state, and the load of the elevating platform can be transmitted to the floor. Since the foot main body portion and the foot placement portion need only be of an integral structure, the foot portion can be of a simple structure.

In the elevating platform, the 1 st leg unit group may belong to two or more leg units, the 2 nd leg unit group may belong to two or more leg units, the support columns of the leg units belonging to the 1 st leg unit group may be disposed in a 1 st support column disposition plane in common, the support columns of the leg units belonging to the 2 nd leg unit group may be disposed in a 2 nd support column disposition plane in common, and the 1 st support column disposition plane and the 2 nd support column disposition plane may be parallel to each other.

When the 1 st manipulation unit is manipulated to change the lengths of the struts of the leg units belonging to the 1 st leg unit group, all the struts belonging to the 1 st leg unit group and arranged in the common 1 st strut arrangement plane are adjusted to the same length in a coordinated manner. When the 2 nd operation unit is operated to change the lengths of the struts of the leg units belonging to the 2 nd leg unit group, all the struts belonging to the 2 nd leg unit group and arranged in the common 2 nd strut arrangement plane also operate in unison and are adjusted to the same length. When the length of the strut of the leg unit belonging to the 1 st leg unit group is the same as the length of the strut of the leg unit belonging to the 2 nd leg unit group, the height of the top plate is changed, and when the two lengths are changed to different lengths, the top plate is inclined according to the difference in the lengths thereof, or can be inclined while changing the height of the top plate.

In the elevating platform, the leg portions attached to the support columns of the leg units belonging to the 1 st leg unit group and the leg portions attached to the support columns of the leg units belonging to the 1 st leg unit group are connected by a connecting member in a state where relative positional changes of the two leg portions according to the inclination of the top plate are absorbed.

The connecting member is connected in a state in which the change of the relative interval and the rotation of the two feet, at which the feet of the stays belonging to the leg unit of the 1 st leg unit group and the feet of the stays belonging to the leg unit of the 2 nd leg unit group approach and separate from each other according to the inclination of the top plate, is brought into an absorbed state. This prevents the legs from being displaced and deformed by further changing the interval and rotation of the legs relative to each other from the connected state, and suppresses the displacement and deformation of the legs due to the lateral displacement and torsion relative to each other in the connected state, thereby improving the rigidity of the leg structure and contributing to the stabilization.

In the elevating platform, the leg units include at least four leg units disposed corresponding to four vertices of a parallelogram, the one side and the other side of the top plate are one side and the other side of two sets of opposing sides of the parallelogram, the two sets of sides of the top plate are provided in such a manner that the foot units are defined as the 1 st leg unit group and the 2 nd leg unit group, and the operation unit is provided with the 1 st operation unit and the 2 nd operation unit.

According to this lifting platform, the one side and the other side of the top plate are the one side and the other side of each of the two opposing sets of sides of the parallelogram, and therefore, there are two sets of the one side and the other side of the top plate. With regard to the four leg units, two leg unit groups can be defined for each group of the top plate. As for the operation portions, as for each group of the top plate, a 1 st operation portion and a 2 nd operation portion for operating the two leg unit groups are provided. That is, since there are two sets of the 1 st operating unit and the 2 nd operating unit, when the top panel is tilted, the operating unit of the operated set can be selected in accordance with the tilt direction selected from the two tilt directions.

In the elevating platform, the leg units each connect the upper end portion of the support column to the top plate, and thus the elevating platform includes a top plate support structure attached to the top plate and the upper end portions of the support columns, and in the top plate support structure corresponding to the four leg units, the four leg units each extend from any one of the operation portions in one of the groups and any one of the operation portions in the other group, and the length of the support column to which the upper end portion is attached can be changed by operating any one of the operation portions.

In this elevating platform, in order to support the top plate, in the top plate supporting structure attached to the upper end portion of each support corresponding to the four vertices (four corners) of the parallelogram, any operation portion of one group and any operation portion of the other group that are arranged with two sides of the four corners interposed therebetween extend. The length of each of the support columns corresponding to the four corners can be changed by an operation from one of the operation portions on both sides. Therefore, since the top plate can be operated in either one of the two sets of the first and second sides, the top plate can be tilted in either one of two tilt directions.

In the elevating platform, the leg portion is rotatably attached to the column so that the direction in which the leg portion main body extends follows the inclination direction, in accordance with the selected inclination direction.

According to this lifting platform, since the direction in which the leg main body of the leg extends matches the direction in which the top plate tilts by rotating the leg with respect to the column, even when one of the two sets tilts with respect to the other set or when either of the two sets tilts with respect to the selected set, the overturning moment of the lifting platform caused by the tilt becomes easy to oppose.

In this elevating platform, the height of the top plate is changed by changing the length of the column of the leg unit belonging to the 1 st leg unit group and the length of the column of the leg unit belonging to the 2 nd leg unit group to the same length.

Although there is a horizontally long elevating platform having four support columns, it is not possible to operate both side operation parts simultaneously by one person, but even in the case of two persons operating, the present invention can change the height by operating the same amount.

[ Effect of the invention ]

The lifting platform is configured as described above, and thus the following unique effects can be achieved.

That is, as a basic structure, the present elevating platform has: a top plate; a plurality of leg units having a strut and a foot; and a plurality of operation units, wherein the plurality of leg units belong to any one group of a 1 st leg unit group and a 2 nd leg unit group, the 1 st leg unit group is arranged on one side of the top plate, and the 2 nd leg unit group is arranged on the other side of the top plate. The length of the strut of the leg unit belonging to the 1 st leg unit group is changed according to the operation of the 1 st operation unit, and the length of the strut of the leg unit belonging to the 2 nd leg unit group is changed according to the operation of the 2 nd operation unit. Since the length of the column of the leg unit belonging to the 1 st leg unit group and the length of the column of the leg unit belonging to the 2 nd leg unit group are changed by operating the 1 st operating unit and the 2 nd operating unit, respectively, the height of the elevating platform is changed when the changed lengths are the same, and the top plate is inclined relative to the other side with respect to the one side or can be inclined while changing the height of the top plate when the changed lengths are different. Since the operation section is divided into two operation sections of the 1 st operation section and the 2 nd operation section, if a user of one person operates both operation sections, by operating each operation section, height adjustment and tilt adjustment can be performed. In addition, two persons can operate the respective operation portions. The 1 st operating part and the 2 nd operating part can be length changing mechanisms for changing the lengths of the pillars used for the lifting table with the height of the top plate adjustable, respectively, and the structure can be simply structured in an accessible manner by using the length changing mechanisms, and the 1 st operating part and the 2 nd operating part are operated individually, thereby providing the lifting table with the height and the inclination of the top plate capable of being easily adjusted.

Drawings

Fig. 1 is a diagram showing an embodiment of an elevating platform of the present invention.

Fig. 2 is a perspective view showing a part of the elevating platform shown in fig. 1 when viewed from the back side.

Fig. 3 is a diagram illustrating a structure of a leg unit of the elevating platform shown in fig. 1.

Fig. 4 is a view showing an operation unit of the elevating platform shown in fig. 1.

FIG. 5 is a view illustrating the inclination of the top plate of the elevating platform shown in FIG. 1

Fig. 6 is a perspective view showing another embodiment of the elevating platform of the present invention.

Fig. 7 is a view illustrating a connection structure between the foot and the leg in the leg structure shown in fig. 6.

Fig. 8 is a perspective view showing another embodiment of the elevating platform of the present invention.

Fig. 9 is a perspective view showing another embodiment of the elevating platform of the present invention.

Fig. 10 is a perspective view showing still another embodiment of the elevating platform of the present invention.

Fig. 11 is a perspective view showing the operation portion and the top board support structure in the embodiment shown in fig. 10.

Fig. 12 is a view for explaining the rotational arrangement of the foot portion in the leg structure of the present invention.

Fig. 13 is a schematic view showing still another embodiment of the elevating platform of the present invention.

Fig. 14 is a schematic view showing still another embodiment of the elevating platform of the present invention in which the shape of the elevating platform is made different.

Detailed Description

Hereinafter, an embodiment of the elevating platform according to the present invention will be described with reference to the drawings. Fig. 1 to 5 are views showing an embodiment of the elevating platform. Fig. 1 is a perspective view and a side view of the elevator platform according to the embodiment of the present invention, and fig. 2 is a perspective view showing a part of the elevator platform when viewed from the back side. Fig. 3 shows a leg structure including a column and a leg portion and a top plate support structure connecting the top plate and the column, which are leg units of the elevating platform. Fig. 4 is a view showing an operation portion of the elevating platform, and fig. 5 is a view explaining inclination of a top plate of the elevating platform.

Fig. 1 shows an embodiment of the elevating platform of the present invention, wherein fig. 1 (a) is a perspective view showing a horizontal state in which the height of the top plate is increased, fig. 1 (b) is a side view thereof, and fig. 1 (c) is a side view showing a horizontal state in which the height of the top plate is lowered. The elevating platform 1 includes: the roof panel 2, a leg structure 3 for supporting the roof panel 2 on the floor surface F, and an operation portion (which will be described later as an operation portion 30 based on fig. 2 and 4) for tilting the roof panel 2. The top plate 2 can be made of various materials such as wood, resin, metal, and glass.

In the case of the present embodiment, the top panel 2 is most commonly used as an elevator platform for office work or work, and is a rectangular top panel in plan view. The top panel 2 is supported on the floor F according to leg structures 3, which leg structures 3 are constituted by four leg units U1 to U4 provided one at each of the four corners of the top panel 2. Each of the leg units U1 to U4 has: a strut 5 whose upper end is mounted on the top plate 2 and whose length is variable; a foot part 6 mounted on the lower end part of the strut 5. When the upper end portions of the pillars 5 are mounted on the top panel 2 by means of the top panel supporting structures 4 mounted slightly inside each corner of the top panel 2, each of the leg units U1 to U4 may include the top panel supporting structure 4. The load of the roof panel 2 and the object placed on the roof panel 2 is transmitted from the roof support structure 4 to the pillars 5, and the load applied to the pillars 5 is supported on the floor surface F via the leg portions 6. In this embodiment, as shown in fig. 1 (b) and (c), the top plate support structure 4 is attached to the upper end portion 5a of each of the support columns 5, and the lower end portion 5b thereof is attached to the leg portion 6 so as to stand upright. In each of the leg units U1 to U4 of the leg structure 3, the roof support structure 4, the stay 5, and the foot 6 have substantially the same structure. Therefore, the leg units U1 to U4 at the four corners have the same configuration except that the arrangement direction around the longitudinal axis of the column 5 is different.

In this embodiment, the four leg units U1-U4 are divided into groups of two leg unit groups, i.e., the 1 st leg unit group G1 and the 2 nd leg unit group G2, along the long edges a, respectively. Each of the leg units U1 to U4 belongs to either one of the 1 st leg unit group G1 and the 2 nd leg unit group G2. That is, the 1 st leg unit group G1 is configured by two leg units U1 and U2 arranged along the one long edge a side of the top plate 2 (the front side in fig. 1a, and the left side in fig. 1b and c), the 2 nd leg unit group G2 is configured by two leg units U3 and U4, and the two leg units U3 and U4 are arranged along the other long edge a side of the top plate 2. The struts belonging to the two leg unit groups G1, G2 were not repeated, and in addition, there were no leg units not belonging to any of the leg unit groups G1 and G2. In this embodiment, the 1 st leg unit group G1 and the 2 nd leg unit group G2 are arranged substantially symmetrically as viewed on a longitudinal plane including the transverse center line L-L connecting the respective intermediate positions of the short edges b, b. When the lengths of all the leg units U1 to U4 (i.e., the lengths of the respective struts 5) are equal, the top plate 2 is horizontal.

The longitudinal center lines of the leg units U1 to U4 attached to the top plate 2 via the top plate support structure 4 (which coincide with the longitudinal center lines of the pillars 5) are perpendicular to the plane defined by the top surface of the top plate 2, and the top plate 2 and each of the leg units U1 to U4 intersect perpendicularly at all times. As shown in fig. 1 (b) and (c), the support columns 5, 5 belonging to the 1 st leg unit group G1 are disposed on a common 1 st support column disposition plane P1 parallel to the one long edge a, and the support columns 5, 5 belonging to the 2 nd leg unit group G2 are disposed on a common 2 nd support column disposition plane P2 parallel to the other long edge a. The 1 st pillar arrangement plane P1 and the 2 nd pillar arrangement plane P2 are parallel to each other. The legs 5, 5 of the leg units U1, U2 belonging to the 1 st leg unit group G1 are adjusted to the same 1 st length in a coordinated manner, and the legs 5, 5 of the leg units U3, U4 belonging to the 2 nd leg unit group G2 are adjusted to the same 2 nd length in a coordinated manner. When the 1 st length and the 2 nd length are different, the top plate 2 is adjusted to be inclined. When the elevating platform 1 is attempted to be inclined, the top plate 2 is inclined in the inclined direction as indicated by an arrow T in fig. 1 (a) in accordance with the operation of the operation unit 30. That is, in the case of the present embodiment, the inclination of the top plate 2 is inclined in such a manner that the short edges b, b are inclined in the up-down direction while maintaining the horizontal state of the long edges a, a.

In the elevating platform 1, the top plate 2 is supported on the floor surface F by the leg portions 6, and the leg portions 6 are disposed at the lower end portions of the respective support columns 5 of the leg units U1 to U4 disposed at the four corners of the top plate 2. Each foot 6 has: a single square tubular foot body portion 7 fixedly attached to the lower end portion 5b of the corresponding support column 5; a plurality of (two in this example) foot rest portions 8, 8 spaced apart from the foot main body portion 7 in the longitudinal direction thereof at positions sandwiching the support column 5 and seated on the floor surface F. When the top plate 2 is supposed to be inclined, the leg main body portion 7 extends in a direction parallel to the short edges b, b of the top plate 2 corresponding to the inclined direction.

In each leg portion 6, one leg portion 8 extends upward through the leg main body portion 7, and the mounting position with respect to the height direction of the leg main body portion 7 is variably mounted in accordance with the leg shaft 9 in response to the tilting of the top plate 2. One of the foot rest portions 8 has a variable height projecting toward the ground surface F side with respect to the foot main body portion 7 in accordance with the angle at which the top plate 2 is inclined, but the other foot rest portion 8 is fixed so as to be embedded in the foot main body portion 7 without penetrating the foot main body portion 7. When the inclined state of the top plate 2 is assumed such that the 2 nd leg unit group G2 is lifted, the long leg shafts 9, 9 penetrating the leg body portion 7 are used in both the leg portions 8, 8.

The foot parts 6, 6 mounted on the two struts 5, 5 of the leg units U1, U2 belonging to the 1 st leg unit group G1 (the 1 st foot group 6G1) are connected to each other by an elongated foot connecting portion 10. The foot link section 10 improves the integrity (rigidity) of the 1 st leg unit group constituted by the leg units U1, U2. The leg units U3, U4 feet 6, 6 belonging to the 2 nd leg unit group G2 (the 2 nd foot group 6G2) are also connected to improve the integrity (rigidity) by other foot connecting parts 10. The foot connecting portions 10, 10 are formed in a shape curved to each other and close to the central side. It is manufactured in the shape of the foot connecting parts 10, 10 so as not to interfere with the feet of the user using the elevating platform 1. Further, if the user's feet using the elevating platform 1 are not obstructed, the straight foot connecting parts 10a, 10a may be used as shown by the imaginary line. The leg connecting portions 10a, 10a may be formed of a bar material or a tubular material having an appropriate cross-sectional shape, and the counterpart to attach each pillar 5 to the leg 6 may be the leg connecting portions 10, 10 connecting the legs 6, 6 instead of the leg main bodies 7, 7 themselves of the legs 6, 6.

As described later, the column 5 has the outer cylinder 11 and the inner cylinder 12 fitted in a nested manner, and when the outer cylinder 11 and the inner cylinder 12 cannot secure a sufficient length of the column 5, the outer cylinder 11 can be used as a connecting cylinder 5c for supplement (see fig. 7 for details). Since the length of the struts 5 is variable, each strut 5 has a locking structure 17 so that the strut 5 can maintain the length. The locking structure 17 is a structure for grasping the inner cylinder 12 at the upper end of the outer cylinder 11, and a general fastening structure can be used. Although not shown in detail, a cam member provided inside the outer cylinder 11 may be pressed against the outside of the inner cylinder 12 and gripped, and an inner circumferential surface of the lock structure 17 attached to the outer cylinder 11 may be gripped by friction against the circumferential surface of the inner cylinder 12. Further, as in the lock structure 17a shown in fig. 3 (a) and (b), a screw may be screwed into the cover attached to the upper end of the outer cylinder 11, and the tip of the screw may be pressed against the outside of the inner cylinder 12. By using the lock structures 17 and 17a, even when a large load is applied to the top plate 2, the inner cylinder 12 can be prevented from being accidentally shortened in length as it is lowered into the outer cylinder 11.

Fig. 2 is a partial perspective view of the tilt-adjustable elevating platform 1 shown in fig. 1, viewed from the inside. In fig. 2, the same reference numerals as those used in fig. 1 are used for the same elements and parts as those shown in fig. 1. In the leg units U1 and U2 to which the 1 st leg unit group G1 corresponding to one long edge a belongs, the 1 st operating part 301 having a rod shape is provided along the one long edge a, and the 2 nd operating part 302 having a similar rod shape is provided in correspondence with the other long edge a with respect to the leg units U3 and U4 to which the 2 nd leg unit group G2 corresponding to the other long edge a belongs (the operating parts 301 and 302 are collectively referred to as the operating part 30). In the two leg unit groups G1 and G2, the 1 st operating part 301 and the 2 nd operating part 302 are individually operated, and the struts 5, 5 of the leg units U1, U2 belonging to the 1 st leg unit group G1 and the struts 5, 5 of the leg units U3, U4 belonging to the 2 nd leg unit group G2 are individually operated. According to the operation section 30, the gas springs, more specifically, the thrust valves provided in the gas springs, which are the adjustment mechanisms for the strut length, provided in the struts 5, 5 of the two leg units to which the respective leg unit groups G1, G2 belong are operated in coordination. Details of each operation unit 30 will be described later with reference to fig. 3 and 4.

Fig. 3 shows details of the column of the lifting table and the top plate support structure and the leg portions related thereto. In fig. 3, the same elements and parts as those shown in fig. 1 are the same as those used in fig. 1. Fig. 3 (a) is a diagram showing a leg structure and a top plate support structure of a leg unit including a stay and a foot. Fig. 3 (b) is an enlarged view showing details of the roof support structure 4, and the roof support structure 4 is interposed between the roof and the pillar to connect the roof and the pillar. Fig. 3 (c) is an enlarged sectional view showing details of the leg portion. As shown in fig. 3 (a) and (b), each of the support columns 5 of the leg unit (shown as leg unit U2) has an inner and outer cylinder body (outer cylinder body 11 and inner cylinder body 12 as gas spring covers) inserted and fitted into each other as a mechanism for adjusting the length of the support column, and the gas spring 13 is incorporated in the inner cylinder body 12. The outer cylinder 11 and the inner cylinder 12 can slide relative to each other while being guided in the longitudinal direction (the upright longitudinal direction) by a vertical groove formed at, for example, the upper end of the outer cylinder 11 and a convex sliding structure of the inner cylinder 12. Although not shown, the lower end of the inner cylinder 12 is slidable on the inner circumferential surface of the outer cylinder 11 by a slider. The locking structure 17a of the outer cylinder 11 and the inner cylinder 12 is as already described. In the example shown in fig. 3, the connecting cylinder 5c for extending the length of the strut 5 is not used.

The outer tubular body 11 (the connection tubular body 5c in the case where the connection tubular body 5c is connected to the lower side of the outer tubular body 11) is attached so that the lower end portion 14 (corresponding to the lower end portion 5b of the support column 5) stands on the foot main body portion 7. The top plate support structure 4 attached to the lower surface of the top plate 2 and the upper end 15 of the inner cylinder 12 (corresponding to the upper end 5a of the support column 5) are made of resin such as polypropylene reinforced with iron or glass fiber, and the separately manufactured members may be fixed by blind rivets or the like, or may be manufactured by integral molding. The structure of each column 5 is similar to that disclosed in the previously proposed application (similar to that disclosed in japanese patent application laid-open No. 2017-029453), as an elevating platform invented by the present applicant.

Each of the columns 5 houses a gas spring 13, the length of which can be changed by being operated by the operation portion 30. Although not particularly shown, the gas spring 13 is composed of a cylindrical body and a piston rod that can advance and retreat by sliding relative to the cylindrical body, and a known structure used in the technical field of chairs, for example, can be used. The gas spring 13 has a lower base end portion fixed to a lower end portion 14 of the outer cylinder 11 and an upper end portion fixed to an upper end portion 15 of the inner cylinder 12. The load acting on the roof panel 2 is transmitted from the roof panel support structure 4 directly mounted on the roof panel 2 to the ground F via the leg structure 3 via the pillars 5. That is, the load is supported on the ground F at the leg portions 6 of the leg structures 3 from the inner cylinder 12 through the gas spring 13 and the outer cylinder 11 in each of the support columns 5.

Referring to fig. 3 (a) and (b), the top plate support structure 4 has a substantially U-shaped groove structure or a quadrangular disk-shaped structure as a whole, and has disk-shaped side wall portions 22 and bottom wall portions 23 so as to form a central recess 21 therein. A flange portion 26 as a flat surface is connected to an upper end of the side wall portion 22, and the roof support structure 4 is attached to the roof panel 2 by attaching the flange portion 26 to the roof panel 2 with an appropriate fastener 24 (only a part of which is given a reference numeral) such as a blind rivet in a state where the flat surface of the flange portion 26 is in contact with the lower surface of the roof panel 2. The roof support structure 4 may be formed by integrally molding the side wall portion 22 and the bottom wall portion 23, or may be formed by fixing a separately manufactured member with a fixing tool such as a blind rivet. The roof support structure 4 can also be fixed to the roof 2 from the rear side thereof at an appropriate position of the side wall portion 22. That is, the roof support structure 4 is closed on the rear surface side of the roof panel 2, and the blind rivet is inserted into the rear surface of the roof panel 2 through the side wall portion 22, whereby the roof support structure 4 can be attached to the roof panel 2 without the rivet protruding on the front surface side of the roof panel 2. The upper end 15 of the inner tubular body 12 of the support 5 is fixed to the bottom wall 23 in a state of penetrating the bottom wall 23 of the central recess 21 of the roof support structure 4. As for the top board support structure 4, although it is another embodiment, a perspective view is also shown in fig. 11.

To operate the gas spring 13, the upper end of the piston rod penetrates the upper end portion 15 of the inner cylinder 12, protrudes into an inner space defined by the central recess 21 of the top plate support structure 4, and the push valve 16 as the gas spring 13 is exposed to the inner space. An operation front end portion of the operation portion 30 extends toward the inside of the roof support structure 4 to operate the push valve 16 exposed therefrom. By pushing the push valve 16 in by the operation of the operation portion 30, the movement of the gas in the gas spring 13 is controlled, and the piston rod advances or retreats from the cylinder. The inner and outer cylinders 11 and 12 are extended and contracted by the operation of the gas spring 13. Then, the length of the strut 5 is changed. The gas pressure (5kg, 8kg, 10kg, 20kg, etc.) in the gas spring 13 is adjusted according to the weight of the gas disposed on the top plate 2 of the elevating table 1. The structure (the connecting member 34; the fulcrum portion 35, etc.) in the top plate support structure 4 for operating the operating portion 30 of the gas spring 13 will be described later with reference to fig. 4 (fig. 11).

Fig. 3 (c) shows the leg portion 6 of the leg structure 3 in an enlarged manner, and fig. 3 (c) shows the one leg portion 6 attached to the one pillar 5, but the other leg portions have the same configuration. In the illustrated example, the two foot rest portions attached to the foot main body portion 7 of the foot portion 6 include: a foot-resting portion 8a with a longer foot-axis 9a and a foot-resting portion 8b with a shorter foot-axis 9 b. The leg shaft 9a of the leg-falling portion 8a on one side is longer than the leg shaft 9b of the leg-falling portion 8b on the other side. As will be described later, in the top plate 2, assuming an inclined state in which the 1 st leg unit group G1 side is lifted, the leg main body portion 7 is lifted from the short leg shaft 9b side with respect to the long leg shaft 9a in any of the legs 6. At the lower ends of the leg shafts 9a, 9b, seat bodies 8c are respectively mounted which are seated on the floor surface F. The seating body 8c is formed into a substantially conical shape and is in contact with the floor surface F over a wide seating surface, and is formed into a rounded shape around the seating surface in consideration of the contact with the floor surface F.

When the top plate 2 is set in the inclined state, the center of gravity of the entire lifting platform 1 moves in the inclined direction, imbalance occurs in the load balance, and an overturning moment acting in a direction in which the entire lifting platform 1 tilts in the inclined direction is generated. The support 5 is fixed to the foot main body portion 7 at a position offset to the side raised by the inclination (the leg-falling portion 8b side) with respect to the longitudinal direction center position of the foot main body portion 7. Since the support column 5 is fixed to the foot main body portion 7 at a position offset from the position, the distance d2 between the connection position of the support column 5 in the foot main body portion 7 and the foot falling portion 8b extending to the downward inclined side can be set longer than the distance d1 between the connection position and the foot falling portion 8a extending to the upward inclined side, and the foot falling portion 8b extending to the downward inclined side can be attached to a position farther from the support column 5.

Such a structure makes it easy to obtain a large moment that opposes the overturning moment acting on the elevating platform 1 based on the reaction force generated by the floor F acting on the foot falling portion 8b on the downward inclination side when the elevating platform 1 is inclined. That is, the foot portions 8a and 8b of the respective legs 6 are disposed at a distance in the longitudinal direction following the inclination direction so as to sandwich the lower end portion 5b of the strut 5, and the distance from the lower end portion 5b of the strut 5 to the foot portion 8b extending toward the downward inclination side is set to be large. Thus, even if an overturning moment is generated on the lifting platform 1, a moment against the overturning moment can be easily obtained based on the reaction force acting on the foot portions 8a and 8b from the ground surface F, and the resistance to the overturning of the lifting platform 1 can be improved.

As an example, as shown in fig. 3 (c), the long leg shaft 9a is configured on the screw shaft 40, and the leg body portion 7 is sandwiched from the upper side and the lower side by two nuts 41, 42 screwed to the screw shaft 40, whereby the leg shaft 9a can be fixed to the leg body portion 7 at an arbitrary height position in the axial direction thereof. It is preferable that the looseness be prevented by interposing the washers 43, 44 between the nuts 41, 42 and the foot main body portion 7. The shorter leg shaft 9b is similarly configured as a screw shaft 45, and the screw shaft 45 can be screwed into a screw hole 46 formed in the leg main body portion 7 to be fixed to the leg main body portion 7. By adopting a joint structure such as the ball joint 47 at the connecting portions between the foot shafts 9a, 9b and the seating body 8c, the seating body 8c is opposed to the floor surface F even if the foot shaft 9a or 9b is inclined, that is, it can be seated in the original manner. Further, the following operation is performed in advance for the short leg shaft 9b, whereby the mounting position can be selected in accordance with the degree of the inclination to be used. This operation is to prepare a plurality of screwing positions (for example, a plurality of screw holes 46a are formed in advance) at which the foot falling portion 8b is screwed into the foot main body portion 7, or to make the foot falling portion 8b slidable with respect to the foot main body portion 7.

In the leg unit groups G1 and G2, the lengths of the struts 5 and 5 of the 1 st and 2 nd leg units U1 and U2 belonging to the 1 st leg unit group G1 and the lengths of the struts 5 and 5 of the 3 rd and 4 th leg units U3 and U4 belonging to the 2 nd leg unit group G2 are changed (independently) from each other, and in order to perform coordinated changes in the leg unit groups G1 and G2, the operation unit 301 is provided for the leg unit group G1, and the operation unit 302 is provided for the leg unit group G2 (see fig. 2). By operating the operation units 301 and 302, the user changes the lengths of the struts 5 and 5 of the 1 st and 2 nd leg units U1 and U2 belonging to the 1 st leg unit group G1 to the same length in a coordinated manner, and also changes the lengths of the struts 5 and 5 of the 3 rd and 4 th leg units U3 and U4 belonging to the 2 nd leg unit group G2 to the same length in a coordinated manner. Since the operation units 301 and 302 can be operated independently of each other, the lengths of the support columns 5 and 5 belonging to the 1 st leg unit group G1 and the lengths of the support columns 5 and 5 belonging to the 2 nd leg unit group G2 can be changed to different lengths from each other according to the operation amounts, whereby the top panel 2 can be tilted relative to one side to the other side or the height of the top panel 2 can be further changed. Even if the user is a single person, the inclination of the top board 2 can be adjusted by operating the two operation units 301 and 302 independently with both hands. When both the operation portions 301 and 302 are operated by the same amount, the height of the top plate 2 can be adjusted.

Fig. 4 shows details of an operation unit provided for tilting the lift table. Fig. 4 (a) is a perspective view showing the entire operation unit and the top plate support structure with the back side as the front side, fig. 4 (b) is a perspective view showing a part of the operation unit shown in fig. 4 (a) and one of the top plate support structures viewed from the front side, and fig. 4 (c) is a partial sectional view showing the details of the L-shaped link. For the sake of simplicity, only one of the operation units 301 and 302 (the operation unit 30 includes a general reference numeral for each component) will be described. The operation unit 30 includes: a handle portion 31, the handle portion 31 extending linearly along a long edge a (see fig. 2); operation rod portions 32, the operation rod portions 32, 32 extending from the handle portion 31 into the top plate support structure 4 individually, the gas spring 13 (see (a) of fig. 3, the top plate support structure 4 corresponding to all the columns 5 (two columns in this example) belonging to the same leg unit group) being operable, the operation rod portions 32, 32 being provided on each side in the left-right lateral direction from the handle portion 31, each operation rod portion 32 having a 1 st rod portion 33a extending linearly, an L-shaped connecting tool 34 provided at the tip of the 1 st rod portion 33a, and a 2 nd rod portion 33b extending linearly in the longitudinal direction (therefore, the direction perpendicular to the 1 st rod portion 33 a) from the connecting tool 34 into the top plate support structure 4, the 1 st rod portion 33a and the 2 nd rod portion 33b constituting a plurality of rod portions (collectively referred to as "33") connected by the connecting tool 34, the handle portion 31 extending linearly instead of the straight line, and may have a shape (shown by an imaginary line) protruding toward the front side in order to be easily grasped by the hand of the user.

As shown in fig. 4a and 4b (and also fig. 1b and 1 c), the operation portion 30 is configured such that the axis of the handle portion 31 and the axes of the operation rod portions 32, 32 are formed in a common plane, the axes of the operation rod portions 32, 32 are formed by the 1 st rod portions 33a, the connecting means 34, and the 2 nd rod portions 33b, and the axes of the operation portion 30 are arranged in a common plane, so that the structural error and backlash of the operation portion 30 are reduced, and the accuracy of the operation when the operation portion 30 is operated is increased, the 2 nd rod portions 33b are formed in the disc-shaped side wall portion 22 of the top plate support structure 4 so as to penetrate through the long holes 25 and extend into the central recess portion 21 of the top plate support structure 4, the long holes 25 are formed lengthwise in the disc-shaped side wall portion 22 of the gas spring 4, and the tip end portion of the 2 nd rod portion 33b protruding into the central recess portion 21 is formed as the operation portion 36 processed to be flat, and the 2 nd rod portion 33b is formed in the middle of the length of the top plate support structure 4 The lever fulcrum portion 35 is supported swingably up and down. The handle portion 31 is grasped by a hand, and the operation portion 30 is operated in a direction approaching the top plate 2 (a depth of the paper surface in fig. 4 a), and in each of the operation rod portions 32, the 2 nd rod portion 33b is rotated by leverage about the lever fulcrum portion 35 as a fulcrum with respect to the top plate receiving structure 4, and the gas spring operation portion 36 abuts against the push valve 16 of the gas spring 13. The two operating rod portions 32, 32 simultaneously push the push valves 16, 16 downward, and can actuate the gas springs 13, 13. As shown in fig. 3, the roof support structure 4 has been described with reference to the bottom wall portion 23, the flange portion 26, and the fixing member 24.

As shown in fig. 4 (c), holes 34a, 34b into which the 1 st rod part 33a and the 2 nd rod part 33b are inserted are formed at both end parts of the L-shaped connecting tool 34. Each hole 34a has an inner diameter into which the 1 st rod part 33a and the 2 nd rod part 33b are inserted, and is formed in such a manner that sufficient gaps Ga, Gb are left between the end surfaces of the 1 st rod part 33a and the 2 nd rod part 33b and the bottom of each hole, respectively, for individual adjustment. The attachment tool 34 intersects the holes 34a, 34a from the outside thereof, and threaded holes 34b, 34b are formed in an open manner. By screwing the small screws 34c, 34c into the screw holes 34b, the leading ends of the small screws 34c, 34c are brought into contact with the 1 st rod part 33a and the 2 nd rod part 33b of the insertion holes 34a, and the 1 st rod part 33a and the 2 nd rod part 33b can be fixed in their positions and postures on the attaching tool 34. The connecting tool 34 is preferably made of a resin (integrally molded) such as metal, nylon, or polypropylene (glass fiber reinforced), so as to provide sufficient rigidity and strength to such an extent that it does not substantially deform under normal operating force, or to such an extent that the thread grooves of the screw holes 34b, 34b are not easily broken.

In the manufacturing of the operation portion 30, there is a possibility that a machining error or an assembly error may occur due to an inaccuracy in machining or assembly. For example, the grip portion 31 and the 1 st bar portions 33a, 33a and the 2 nd bar portions 33b, 33b are not correctly in one plane, or the 1 st bar portions 33a, 33a are not integrated in one common line, and even the 2 nd bar portions 33b, 33b are not parallel to each other. In this case, it is difficult to coordinate the operations of the pusher valves 16 of the gas springs 13, that is, to operate simultaneously and equally, only by operating the handle portion 31. Further, in the case where the 1 st rod parts 33a, 33a and the 2 nd rod parts 33b, 33b are manufactured as a single rod-shaped body and are continuous as one integral member without using the connecting tools 34, it is difficult to accurately manufacture the first rod part 33a and the second rod part 33b in one group and the second rod part 33a and 33b in the other group in the 1 st and the 2 nd rod parts 33a and 33b in a common plane. Further, if the rigidity of the rod-shaped body as an integral body is increased, the timing of pressing the push valves 16 of the two gas springs 13, 13 is deviated, and it becomes difficult to coordinate the operations. Conversely, when the rigidity of the integral rod-shaped body is reduced, a large deformation such as bending or twisting is likely to occur in the bent portion between the 1 st rod part 33a and the 2 nd rod part 33b, and even if the operation amount of the grip portion 31 is increased, the operation amount is not transmitted to the 2 nd rod parts 33b and 33b, and eventually, the push valves 16 and 16 of the two gas springs 13 and 13 cannot be fully pushed down. In this case, it takes time to change the height of the top plate 2.

According to the operation unit 30 of the present embodiment, by using the connection tool 34, in the state before fixing, the connection tool 34 allows the 1 st rod part 33a and the 2 nd rod part 33b to rotate about the 2 nd axis (about the axis θ of the 1 st rod part 33a and the axis δ of the 2 nd rod part), and in the same state before fixing, the movement of the axial direction X of the 1 st rod part 33a and the axial direction Y of the 2 nd rod part 33b is allowed within the range allowed by the gap Gb of the gap Ga, respectively. Since such rotation and movement are permitted, the handle portion 31 of the operating rod 30 is operated in a state where the screws 34c, 34c are loosened, and the insertion amount and angle with respect to the 1 st rod portion 33a, 33a and the 2 nd rod portion 33b, 33b of the connecting tools 34, 34 are adjusted, whereby a state can be established where the gas spring operating portions 36, 36 at the leading ends of the 2 nd rod portions 33b, 33b are in contact with (only in contact with, not pushed in) the push valves 16, 16 of the gas springs 13, 13. In the case of screwing the small screws 34c, 34c into the screws in this contact state, the operation part 30 can maintain the overall structure even if the 1 st rod part 33a, 33a and the 2 nd rod part 33b, 33b are fixed to the connecting means 34, 34 after the operation of the operation rod 30 is released. After absorbing such a fixed state of the gap, the user operates the operation portion 30 while the connecting tools 34, 34 also have high rigidity against bending and twisting deformation, and the one operation with the handle portion 31 is not absorbed in the middle but conducted to the gas spring operation portions 36, 36 of the 2 nd rod portions 33b, and the push valves 16, 16 of the two gas springs 13, 13 are operated in unison, that is, simultaneously in contact with the push valves 16, 16 and can be pushed in by the same amount. In this way, even if the handle portion 31 and the 1 st and 2 nd rod portions 33a, 33b do not have accurate alignment and parallelism at the time of manufacture, the operating portion 30 is assembled to the top plate support structures 4, 4 in a state where manufacturing errors due to machining errors and assembly errors are absorbed.

With regard to the structure of the operation rod part 32 using the connecting tool 34, all the operation rod parts 32 extending within the respective top plate holding structures 4 are not necessarily required. That is, this applies not only to the case where the leg unit belonging to one group is two leg units, but also to the case of three or more leg units. One operating rod part 32 is a structure (3 rd rod part) that extends directly into the roof support structure 4 without using the connecting means 34, and all the remaining operating rod parts 32 can have a structure using the connecting means 34. The operation rod part 32 directly extending to the roof panel support structure 4 is a reference operation rod part for matching with the other operation rod part 32. That is, in a state where the small screws 34c, 34c are loosened in all the connecting tools 34 used, the operating portion 30 is operated to directly extend the 3 rd rod portion inside the roof support structure 4 into contact with the push valve 16 of the gas spring 13. In this state, in the remaining operation rod portion 32, by adjusting the insertion amount and angle of the 1 st rod portion 33a and the 2 nd rod portion 33b with respect to the connection tool 34, a state can be formed in which the gas spring operation portion 36 at the tip end of the 2 nd rod portion 33b abuts (only abuts without being pushed in) against the push valve 16 of the gas spring 13. In this contact state, the 1 st rod part 33a and the 2 nd rod part 33b are fixed to the connection tool 34 by screwing in the small screws 34c, 34c in all the connection tools 34, and a structure of integrally assembling the operation part 30 can be obtained. After absorbing the assembled state of these gaps, when the user operates the operation portion 30, one operation of the handle portion 31 is not absorbed in the middle of all the operation rod portions 32 including the 3 rd rod portion, but is transmitted to all the gas spring operation portions 36, so that the push valves 16 of all the gas springs 13 can be operated in cooperation.

Fig. 5 is a diagram illustrating the inclination of the top plate with respect to the tilt-adjustable elevating platform shown in fig. 1 to 4. In fig. 5, the same reference numerals are used for the same elements and parts as those shown in fig. 1. In the state shown in fig. 5 (a), the length of the strut 5 to which the 1 st leg unit group G1 belongs and the length of the strut 5 to which the 2 nd leg unit group G2 belongs have the same length. The top plate 2 is in a horizontal state. Here, the length of the strut 5 belonging to the 2 nd leg unit group G2 is not changed, and only the length of the strut 5 belonging to the 1 st leg unit group G1 is changed to be longer. As shown in fig. 5 (b), the top panel 2 is thus in a state in which the side of the strut 5 belonging to the 1 st leg unit group G1 is high and the side of the strut 5 belonging to the 2 nd leg unit group G2 is low, and the top panel 2 is inclined in the inclination direction S. Since the foot main body portion 7 is fixedly mounted on the stay 5, when the top plate 2 is inclined with the stay 5, the foot main body portion 7 is also inclined with the stay 5. Since the one foot-receiving portion 8a is attached to the foot shaft 9a so as to be variable in the projecting height in the direction (height direction) toward the floor surface F with respect to the foot main body portion 7, even if the foot main body portion 7 is inclined with the inclination of the top plate 2, the foot-receiving portions 8a and 8b can be seated against the floor surface F, and the load of the elevating platform 2 can be transmitted to the floor surface F. The leg portion 8a and the leg shaft 9a and the leg portion 8b and the leg shaft 9b are connected by the ball joint 7 ((c) of fig. 3), so that the angular deviation accompanying the inclination of the top plate 2 can be absorbed. The overturning moment generated in the entire platform 1 as a result of the tilting is counteracted by the foot pedal with the foot-rest sections 8a, 8 b.

Fig. 6 is a perspective view partially showing another embodiment of the elevating platform of the present invention. Fig. 6 (a) is a perspective view showing a non-inclined state of one column and a leg portion of the elevating platform, and fig. 6 (b) is a perspective view showing an inclined state of the elevating platform. In the leg structure of the elevating platform 1a, in the case of the leg structure 3a including four leg units U1 to U4 arranged corresponding to corners, all the support columns 5 and the leg portions 6 have the same structure as shown in the drawing. The leg structure 3a of the elevating platform 1a shown in fig. 6 is configured such that the lower end portion 5b of the support column 5 (the lower end portion of the connecting cylindrical body 5c) is opposed to the leg body portion 7 of the leg portion 6, and is connected at an arbitrary angle only around the axis L1 parallel to the tilt axis in the tilt direction T (fig. 1). Therefore, in the present embodiment, the inclination of the top plate 2 is only the direction shown by S and the opposite inclination direction in fig. 6 (b).

Fig. 7 is an explanatory view showing a connection structure between the leg portion and the support column of the leg structure shown in fig. 6. Fig. 7 (a) is an explanatory diagram showing an example of a connection structure between the leg 5 and the foot 6 of the leg structure 3a shown in fig. 6. Fig. 7 (b) is an explanatory view showing another example of the connection structure between the strut 5 and the leg 6. In fig. 7, (a) is a plan view of the strut 5 and the foot 6 of the leg structure 3a as viewed from above, and (B) is a diagram showing 3 washers interposed between the strut 5 and the foot 6 in a laterally juxtaposed manner. (C) The side view is shown by a partial cross section of (A), and the view is shown by (D) a sleeve for the pillar 5 side. (E) A drawing showing a connecting bolt and a washer for use in the connecting structure.

Referring to fig. 6 and 7, in the leg structure 3a, a block-shaped adapter 50 is fixedly attached to the lower end portion 5b of the stay 5. The adapter 50 is fixed to the foot main body portion 7 by screwing the threaded knob 51 (connecting bolt) in the direction of the axis L1 in a state of being in contact with the side surface 7a of the foot main body portion 7 facing the inside of the elevating table. The foot main body portion 7 is fixedly mounted with a nut 60 that can be screwed into the external thread of the knob 51, and in the adapter 50, a sleeve 61 is mounted in alignment with the nut 60 mounted on the foot main body portion 7. A lock washer group 62 is interposed between the foot main body portion 7 and the adapter 50. The washer group 62 is composed of three washers, and is composed of annular washers 63, 63 and a spring washer 64, the annular washers 63, 63 are placed on the side of the leg body portion 7 and the adapter 50, and the spring washer 64 is interposed between the two annular washers 63, 63. The spring washer 64 is formed in a C-shape, and the sandwiching direction is formed in a wave shape. The threaded knob 51 includes an externally threaded portion 65 and a knob portion 66. In addition, the lower end portion 14 of the outer cylinder 11 of the gas spring abuts against the deformed portion of the connection cylinder 5c protruding into the cylinder in accordance with the embossments 68 applied to the connection cylinder 5c, and is thus positioned at a position where it no longer continues to descend. Further, the front end of the fixing screw 69 screwed into the outside of the cylindrical connection body 5c of the column 5 is in contact with the lower end portion 14 of the outer cylindrical body 11, and the outer cylindrical body 11 is fixed to the cylindrical connection body 5 c.

The post 5 is connected to the foot main body portion 7 by passing the male screw portion 65 of the knob 51 through the sleeve 61 and the washer set 62 and then screwing the male screw portion 65 into the nut 60 of the foot main body portion 7. The male screw 65 is screwed into the nut 60 and can extend into the foot body 7. By operating the handle 51, the screw is loosened, and the connection between the foot main body portion 7 and the adapter 50 becomes free. When the knob 51 is tightened, the screw can be prevented from loosening by the elastic force of the spring washer 64. A washer 67 is interposed between the knob portion 66 of the knob 51 and the adapter 50, and the screw of the threaded knob 51 is also secured. The mounting angle of the foot main body portion 7 with respect to the adapter 50 can be changed according to the inclination of the top plate 2. When the mounting angle is determined, the tilt angle of the column 5 can be maintained and fixed by screwing the operation knob 51 as shown in fig. 6 (b). Even if the inclination angle of the top plate 2 is changed, the posture of the foot main body portion 7 with respect to the floor surface F does not change, and therefore, a state in which all the foot portions 8 of the foot main body portion 7 are seated against the floor surface F can be obtained. The external thread portion 65 of the knob 51 is passed through the leg body portion 7, and the other nut is screwed to the end of the protruding external thread portion 65 to be screwed and fixed.

In the connection structure between the strut 5 and the foot 6 shown in fig. 7 (b), the threaded knob 51 is directly inserted into the cylindrical connection body 5c of the strut 5, and therefore the strut 5 is connected to the foot body 7. That is, the nut 70 is fixedly attached to the leg body portion 7, and the sleeve 71 is attached to the lower portion of the connecting cylindrical body 5c in a penetrating state. A washer set 72 for preventing looseness is provided between the nut 70 and the lower portion of the connection cylinder 5 c. The washer group 72 is a three-piece washer, and is composed of annular washers 73, 73 and a C-shaped spring washer 74 sandwiched therebetween, similarly to the washer group 62 shown in fig. 7 (a). The screw-equipped knob 51 as the connecting bolt has the same configuration as the screw-equipped knob 51 shown in fig. 7 (a), but is denoted by male screw portion 75 and knob portion 76. Further, a washer 77 similar to the washer 67 is interposed between the knob portion 76 of the threaded knob 51 and the column 5.

The externally threaded portion 65 of the knob 51 is connected to the foot main body portion 7 by passing through the sleeve 71 and the washer set 72 of the connection cylinder 5c, and by screwing the externally threaded portion 65 into the nut 70 fixed to the foot main body portion 7. The male screw 65 is screwed into the nut 60 and can extend into the foot body 7. By loosening the screw by operating the knob 51, the connection of the foot main body portion 7 and the adapter 50 is free. When the knob 51 is tightened, the screw is prevented from loosening by the elastic force of the spring washer 72. A washer 77 is also sandwiched between the knob 76 of the knob 51 and the post 5 to ensure threaded tightening of the threaded knob 51. The mounting angle of the strut 5 to the foot main body portion 7 is the same as in the case of the connection structure shown in fig. 7 (a). Since the inclination of the top plate 2 can be changed, the explanation thereof will be omitted. Further, the embossments 78 and the fixing screws 79 formed on the coupling cylindrical body 5c for fixing the outer cylindrical body 11 of the gas spring are also the same as the embossments 68 and the fixing screws 69 described in the case of the coupling structure shown in fig. 7 (a), and therefore, the explanation thereof is omitted.

Fig. 8 is a diagram showing still another embodiment of the elevating platform of the present invention. Fig. 8 (a) is a perspective view showing the whole of still another embodiment of the elevating platform of the present invention. Fig. 8 (b) is an enlarged perspective view showing a part thereof. In the elevating platform 1b shown in fig. 8, the leg portion 6 attached to the column 5 to which the 1 st leg unit group G1 belongs and the leg portion 6 attached to the column 5 to which the 2 nd leg unit group G2 belongs (adjacent to the leg portion 6 belonging to the 1 st leg unit group G1) are connected by the connecting member 55. In this example, the connecting member 55 has an elongated plate member 56 formed with elongated holes 57, 57 extending in the longitudinal direction at both ends. The elongated plate member 56 is screwed into the leg body portion 7 of the leg portion 6, 6 by the wing bolts 58, 58 passing through the elongated holes 57, and thus connects the leg portions 6, 6. In a state where the thumb bolt 58 is loosened, the member to be connected 55 can absorb within a range allowed by the elongated holes 57, 57 in accordance with a change in the interval or rotation of the both leg portions 6, 6 which approach and separate from each other due to the inclination of the top plate 2. The 1 st operating part 301, the 2 nd operating part 302, and the leg portions 8a and 8b are the same as those shown in fig. 1.

When the tilt angle of the top plate 2 is determined, the wing bolts 58, 58 passing through the elongated holes 57, 57 are screwed into the leg body portions 7, 7 of the two-leg unit groups G1, G2 in a state of sandwiching the elongated plate member 56, whereby the leg portions 6, 6 are connected by the connecting member 56. In this connected state, the connecting member 56 suppresses lateral displacement or torsional displacement of the two leg portions 6, 6 from each other, so the rigidity of the leg structure 3b can be improved, and stability can be facilitated. The long and narrow plate member 56 is a single long and narrow plate member 56, but it is also possible to constitute a connecting member composed of two members fixed to the two leg portions 6, respectively, and bolted by long holes overlapping each other.

In the above embodiments, the 1 st leg unit group G1 and the 2 nd leg unit group G2 are both examples including 2 support columns 5, but each group may include one or more support columns 5. However, one of the groups is preferably two support columns. In the case of a large-sized elevating platform, etc., one or both of the support column groups may include three support columns depending on the size and shape of the top plate 2. Fig. 9 is a perspective view showing still another embodiment of the elevating platform of the present invention. In fig. 9, the same reference numerals as those used in fig. 2 are used for the same elements and parts as those shown in fig. 2. The elevating platform 1c shown in fig. 9 is a perspective view showing the elevating platform from the back side. The 1 st leg unit group G1 includes 3 leg units U1, U2, and U5 aligned in a line along one side edge 1a, and the 2 nd leg unit group G2 includes three leg units U3, U4, and U6 aligned in a line along the other side edge a. The leg unit U5(U6) is disposed at an intermediate position between the leg units U1 and U2 (leg units U3 and U4). The operation units 301 and 302 have the 2 nd rod parts 33c and 33c extending into the top plate support structures 4 and 4 of the leg units U5 and U6, respectively, so as to vertically branch from the center parts of the 1 st rod parts 33a and 33a of the rod parts 33 and 33 in the center direction of the lifting table 1c in order to operate the corresponding leg units U5 and U6. Each of the 2 nd rod parts 33c includes a lever fulcrum portion 35 and a gas spring operating portion 36, which is the same as the other 2 nd rod parts 33b (see also fig. 4). By operating the operation unit 301, the leg units U1, U2, and U5 belonging to the 1 st leg unit group G1 are simultaneously operated (the length of each leg is changed by 5), and by operating the operation unit 302, the leg units U3, U4, and U6 belonging to the 2 nd leg unit group G2 are simultaneously operated (the length of each leg 5 is changed). This embodiment is particularly preferable in the case of a large elevating platform that is long in the lateral direction or a large load loaded on the elevating platform.

As the configuration of the operation unit 30, an example is described in which a lever is used in which the operation tip portion 36 is moved up and down by the action of a lever of the lever fulcrum portion 35 located at an intermediate position, and the operation tip portion 36 presses the push valve 16 to operate. However, as another configuration of the operation portion 30, a configuration in which the operation portion advances and retreats inside the top plate support structure can be adopted in accordance with the operation of the operation tip portion having the tapered surface. In this case, the pusher valve 16 is operated by being pressed downward by wedge action of the tapered surface of the operation tip portion which advances and retreats.

Fig. 10 is a perspective view showing still another embodiment of the elevating platform of the present invention. The lifting platform 1d shown in fig. 10 is provided with two sets of the 1 st leg unit group and the 2 nd leg unit group, and two sets of the 1 st operating part and the 2 nd operating part, for example, so that four support columns 5 are arranged at positions corresponding to the four corners of the top plate 2. That is, the 1 st leg unit group G1(i) and the 2 nd leg unit group G2(i) which are one of the leg unit groups are arranged along the long edges a, a of the top plate 2 in the same manner as the 1 st leg unit group G1 and the 2 nd leg unit group G2 in the example shown in fig. 2, but the 1 st leg unit group G1(ii) and the 2 nd leg unit group G2(ii) which are the other of the leg unit legs are assembled in parallel along the short edges b, b of the top plate 2 from the same four leg units U1 to U4. The four leg units U1 to U4 show examples in which the four leg units occupy positions that coincide with the four vertices of a rectangle, but even if the top plate 2 is formed in a parallelogram shape and is disposed at positions that coincide with the four vertices, the same effect can be obtained without the inclination directions being perpendicular to each other.

As for the operation units, the 1 st operation unit 301(i) and the 2 nd operation unit 302(i) as one group are arranged along the long edges a and a of the top panel 2, as in the 1 st operation unit and the 2 nd operation unit 301 and 302 in the example shown in fig. 2, but the 1 st operation unit 301(ii) and the 2 nd operation unit 302(ii) as the other group are arranged along the short edges b and b of the top panel 2. The other group of the 1 st operating unit 301(ii) and the 2 nd operating unit 302(ii) has the same configuration except that the length thereof is different from that of the 1 st operating unit 301(i) and the 2 nd operating unit 302(i) of the one group, and therefore, the explanation thereof is omitted. By operating the 1 st operating unit 301(ii) and the 2 nd operating unit 302(ii) of the other group, when the 1 st operating unit 301(i) and the 2 nd operating unit 302(i) of one group are operated, the top plate 2 can be tilted in the tilt direction s (ii) orthogonal to the tilt direction s (i). The top board support structure 4a used in the present embodiment will be described later with reference to fig. 11.

Fig. 11 is a perspective view showing the operation portion and the top board support structure in the embodiment shown in fig. 10. In the top board support structure 4a shown in fig. 11, long holes 25, 25 are formed in the side wall portions 22, 22 on both sides of the angle, respectively. The 2 nd rod portion 33b of the 1 st operating portion 301(i) of one group and the 2 nd rod portion 33b of the 2 nd operating portion 302(ii) of the other group enter the recess 21 at the center of the top plate supporting structure 4a through the elongated holes 25, 25. The lower edge portions of the elongated holes 25, 25 constitute fulcrum portions 35, and when the 1 st operating portion 301(i) of one group and the 2 nd operating portion 302(ii) of the other group are operated, the 2 nd rod portions 33b, 33b operate the gas spring operating portions 36, 36 formed at the front ends of the 2 nd rod portions 33b, 33b in the up-down direction by the leverage of the fulcrum portions 35. The gas spring operation portions 36, 36 of the 2 nd rod portions 33b, 33b are disposed in the recess 21 in a state of being overlapped vertically on the pusher valve 16.

When only the 1 st operating unit 301(i) is operated, the gas spring operating portion 36 formed at the tip of the 2 nd rod portion 33b of the 1 st operating unit 301(i) pushes the pusher valve 16 directly, and the gas spring is operated. When the 2 nd operating part 302(ii) is operated, the gas spring operating portion 36 formed at the tip of the 2 nd rod part 33b of the 2 nd operating part 302(ii) presses the gas spring operating portion 36 of the 1 st operating part 301(i), whereby the gas spring operating portion 36 of the 1 st operating part 301(i) presses the push valve 16, whereby the gas spring can be operated. The other structure of the roof support structure 4a is the same as the structure of the roof support structure 4 shown in fig. 4, and therefore the same reference numerals are used for the roof support structure 4, and the description thereof is omitted.

Fig. 12 is a view for explaining a rotational arrangement of the leg portion of the leg structure of the present invention. Since the cross section of the strut 5 of the leg structure is circular, when the strut 5 is attached to the foot body portion 7 of the foot portion 6, it is easy to change the angle around the axis of the strut 5 and attach the strut. The projections and the recesses fitted to the projections are formed at 90-degree intervals around the axis of the column 5, or the bottom of the column 5 is screwed at 90-degree intervals. The direction in which the leg body 7 of the leg 6 extends can be changed by a combination of the operated 1 st and 2 nd leg groups and the inclination direction of the top plate 2. In the basic shape of fig. 12 (a), the 1 st and 2 nd strut sets are arranged along the long edges a, a of the top panel 2. The tilt (downward) direction S of the top plate 2 caused by the operation at this time is a direction from the positions of the leg portions 8a and 8b toward the lower side of the drawing.

Fig. 12 (b) shows a state in which the foot main body 7 is rotated by 180 degrees from the arrangement of fig. 12 (a). The operated 1 st and 2 nd pillar groups are unchanged from the basic form, but the direction in which the top panel 2 is inclined is opposite, and the inclined (downward) direction S is a direction toward the upper side in the figure. Fig. 12 (c) shows a state in which the foot main body 7 is rotated 90 degrees clockwise from the arrangement of fig. 12 (a). The inclined (downward) direction S at this time is a direction from the positions of the leg portions 8a, 8b toward the left side in the figure. The operated 1 st and 2 nd strut groups are different groups (groups along the other of the short sides b, b) from the group in the case of the basic shape. Fig. 12 (d) shows a state in which the foot main body 7 is rotated by 270 degrees clockwise from the arrangement of fig. 12 (a). The inclined (downward) direction S at this time is a direction from the positions of the foot falling portions 8a, 8b toward the right side in the figure. The group of the 1 st and 2 nd strut groups is the same as the group of fig. 12 (c) (the group along the other of the short sides b, b), but the direction of operation is opposite and the direction of inclination is opposite. In either case, the foot main body portion 7 is within a range in which the top plate 2 projects onto the floor surface F. Since the leg does not protrude beyond the projection of the top plate 2, the leg of an operator or the like moving around is not obstructed.

Fig. 13 is a schematic diagram for explaining the case where the present invention is applied to a horizontally long elevator, and is a diagram viewed from a foot main body portion toward a top plate. The lifting platform 1e shown in fig. 13 (a) is, for example, a lifting platform of the top plate 2 which is laterally long (the long sides a, a are sufficiently longer than the short sides b, b). Since the leg structure 3 including the strut and the foot is the same as the structure shown in fig. 3 and 12, the detailed description thereof is omitted here. The lifting platform 1e has a horizontally long structure in which one person cannot simultaneously operate the operation units 30, 30 on both sides, but the operation units 30, 30 arranged along the short edges b, b are shared by two persons, so that the lengths of the columns of the 1 st leg unit group G1 and the 2 nd leg unit group G2 along the short edges b, b can be changed. When the lengths of the struts changed by the leg unit groups G1 and G2 are the same, the height of the top plate 2 is adjusted, and the height is changed and the height is inclined in the inclination direction (lateral direction) S in some cases. As shown in the elevating platform 1f in fig. 13 (b), the operation units 30 and 30 may be arranged along the long edges a and a. Since the elevating platform 1f is the same as the elevating platform 1e except for the arrangement of the operation units 30, 30 and the cell groups G1, G2, the same components are given the same reference numerals, and the explanation thereof is omitted. In the case of the elevating platform 1f, the two operation portions 30, 30 can be operated by one person, and in this case, the inclination direction S is the vertical direction.

Fig. 14 is a diagram showing still another embodiment of the elevating platform of the present invention. As shown as the elevating table 1g in fig. 14 (a), the top plate 2a may be a circular top plate. The leg structure, the 1 st and 2 nd strut groups and the leg units may be the same as the leg structure 3, the 1 st and 2 nd strut groups G1, G2 and the leg units U1 to U4 shown in fig. 1 and the like. As shown in the elevating platform 1h in fig. 14 (b), the top plate 2b may be in the form of an L-shaped top plate. In this case, the 1 st and 2 nd strut groups G1 and G2 of the leg unit structure may be arranged in such a manner as to cross with L-shaped inclination. The lengths in the direction of the elevator table top (the length of the operation unit 30) of the 1 st and 2 nd strut groups G1, G2 are different, but the leg units U1 to U4 may have the same configuration. The same leg structure can be used instead of an L-shaped lifting platform, a semicircular lifting platform, a quadrant lifting platform or a fan-shaped lifting platform.

The tiltable elevating table of the present invention has been described above by taking a few examples, but various modifications are arbitrary. For example, since the seating body 8c of the foot rest portion 8 can move the platform 1 on the floor F, it may be a caster with a rotation stop lock function, for example. Although the top plate has been described as a flat plate, it is clear that the top plate can take various forms depending on the use of the lifting. For example, in the case where the lifting platform is applied to a bed or a sofa, it is clear that the top plate is in the form of a table top for supporting a cushion or a seat cushion. The elevating platform according to the present invention includes a platform for placing articles such as a furnace, a carriage, a linear stage, a shop stage, a display stage, and a learning stage, or for performing work on a horizontal surface or a surface close to the horizontal surface, and is applicable to all elevating platforms that provide functionality of the platform in accordance with vertical movement.

Description of the symbols

1, 1a, 1b, 1c, 1d, le, 1f, 1g, 1h lifting platform

2, 2a, 2b top plate

3, 3a, 3b leg structure

4, 4a roof support structure

5 support post

5a upper end

5b lower end part

6 foot part

7 foot main body part

7a side surface

8(8a, 8b) foothold

8c seat body

9 foot shaft

9a long foot shaft

9b short foot shaft

10, 10a foot connection

11 outer cylinder

12 inner cylinder (outer cylinder)

13 gas spring

14 lower end of the outer cylinder 11

15 upper end of the inner cylinder 12

16 push valve

17, 17a locking structure

21 central recess

22 side wall part

23 bottom wall part

24 fastening tool

25 long hole

26 flanged portion

30(30a, 30b) operating part

31 handle part

301, 301(i), 301(ii) No. 1 operation part

302, 302(i), 302(ii) 2 nd operation part

32. Operating rod part

33 stick part

33a 1 st bar part

33b 2 nd bar part

34 connecting tool

34a, 34a holes

34b, 34b threaded holes

35 fulcrum portion of lever

36 gas spring operating portion

40 screw shaft

41, 42 nut

43, 44 gasket

45 screw shaft

46 screw hole

47 ball joint

48 ball joint

49 connecting member

50 adapter

51 knob

55 connecting member

56 slender plate material

57 long hole

58 butterfly bolt

60, 70 screw cap

61, 71 sleeve

62, 72 washer set

63, 73 ring gasket

64, 74 spring washer (spring washer)

65, 75 external thread part

66, 76 knob part

67, 77 gasket

68, 78 embossing

69, 79 set screw

a, a long edge

b, b short edge

S, S (i), S (ii) the directions of inclination

Direction of inclination of T

F floor

L transverse center line

L1 axis

Ga, Gb gap

G1, G1(i), G1(ii) 1 st leg unit group

G2, G2(i), G2(ii) group of 2 nd leg units

6G1 foot group 1

6G2 No. 2 foot group

U1, U2, U3, U4, U5, U6 leg unit

P1 No. 1 pillar-disposing surface

P2 support No. 2.