阅读说明：本技术 避难装置 (Refuge device ) 是由 城户宪昌 藤谷哲也 小野木涉 浅川友纪 于 2020-05-01 设计创作，主要内容包括：本发明的目的在于提供一种避难装置,其能够使轮椅使用者安全地避难。避难装置具有：从被保持在向上层开设的避难用开口(2)内的待机位置下降至下层的升降台(4)；配置于升降台(4)的乘入侧边缘部且被向从升降台(4)表面突出的立起位置侧加力的车轮阻挡用的铰链板(5)；以及铰链板锁定部(6),其在上述升降台(4)的升降时为锁定状态而限制上述铰链板(5)向倒伏位置侧移动,并在升降终端位置解除锁定状态。(The invention aims to provide an evacuation device which can safely evacuate wheelchair users. The refuge device comprises: a lifting platform (4) which is lowered to the lower layer from the standby position kept in the refuge opening (2) opened to the upper layer; a wheel-blocking hinge plate (5) disposed at the riding-in side edge of the elevating platform (4) and urged toward the rising position protruding from the surface of the elevating platform (4); and a flap lock section (6) that is in a locked state when the lift table (4) is raised and lowered, restricts the flap (5) from moving to the falling position side, and releases the locked state at the lift end position.)

1. An evacuation device characterized in that the device is provided with a plurality of evacuation pipes,

comprising:

a lifting platform which is lowered to the lower layer from the standby position kept in the refuge opening arranged on the upper layer;

a wheel-blocking hinge plate disposed at a riding-side edge portion of the elevating platform and urged toward a standing position side protruding from a surface of the elevating platform; and

and a flap locking portion that is in a locked state when the lift table is lifted and lowered, restricts the flap from moving to a falling position side, and releases the locked state at a lift end position.

2. The shelter of claim 1,

the hinge plate locking portion includes:

a lock control body rotatably connected to the lift table; and

a hinge plate locking body rotatably connected to the lock control body and the hinge plate,

the hinge plate locking body and the lock control body are locked so that an intersection angle thereof cannot be changed with respect to a force for operating the hinge plate to move toward a falling position in a locked state of the hinge plate locking portion.

3. The shelter of claim 2,

in the locked state of the flap lock portion, the lock control body is urged toward the lock position locked with the flap lock body,

The hinge plate locking body is urged toward a locking position where the hinge plate locking body is locked with the lock control body located at the locking position,

at the lifting terminal position of the lifting table, either one of the locking control body and the hinge plate locking body and the other locking releasing direction are rotationally driven by a releasing operation part arranged at the lifting terminal position, so that the locking state of the hinge plate locking part is released.

4. A shelter apparatus as claimed in claim 3,

an inclined body is provided in the evacuation opening, and when the elevating platform is at the standby position, the inclined body is held at a fixed position where the free end portion thereof is placed on the elevating platform,

the tilting body is moved to a hanging-down posture by the descending of the lifting table, and the tilting body is returned to a fixed position by the ascending of the lifting table,

the tilting body is provided with the release operation portion for rotating the hinge plate locking body in the locking release direction with the locking control body when the tilting body returns to the fixed position.

5. The shelter of claim 4,

the free end of the tilting body is provided with a fixed roller which abuts against the lifting table in the lifting posture and generates a rotation moment to the fixed position side by the tilting body.

6. A shelter as claimed in any one of claims 2 to 5,

the lock control body is provided with a detection projection which abuts against a lower floor surface when the lifting platform is lowered to a lower floor, and rotates the lock control body in a direction of releasing the locking with the hinge plate lock body.

Technical Field

The present invention relates to an evacuation device.

Background

As an evacuation device for raising and lowering a lift table between an upper floor surface and a lower floor surface, a device described in japanese patent application laid-open No. 2010-51473 is known.

However, when the area of the elevating platform can be increased and the wheelchair user can evacuate the wheelchair, if the wheelchair is forgotten to lock the tire or the like and the method of use is wrong, the wheelchair may roll off the elevating platform.

Disclosure of Invention

Problems to be solved by the invention

The present invention has been made to solve the above-described drawbacks, and an object thereof is to provide an evacuation device capable of safely evacuating a wheelchair user, while avoiding danger and improving safety.

Means for solving the problems

According to the present invention, the above object is achieved by providing an evacuation device comprising: the device comprises a lifting platform which is lowered to a lower layer from a standby position kept in an evacuation opening opened at an upper layer, a hinge plate which is arranged at the edge part of the riding-in side of the lifting platform and used for blocking wheels and is forced to a rising position side protruding from the surface of the lifting platform, and a hinge plate locking part which is in a locking state when the lifting platform is lifted and is used for limiting the hinge plate to move to a falling position side and releasing the locking state at a lifting terminal position.

In the present invention, a hinge plate that rotates between a standing position and a falling position is provided at a rear edge portion of the elevating platform, that is, a riding-in side edge portion of the elevating platform. The hinge plate is raised at a rising position to a height of a wheel stopper of the wheelchair on the platform, and the rising state of the hinge plate is maintained when the hinge plate locking portion is in a locked state.

The flap lock section is in a locked state during the elevation of the elevation platform, and maintains the upright posture of the flap, so that the flap lock section serves as a wheel stopper of the wheelchair on the elevation platform and prevents the wheelchair from rolling off the elevation platform.

When the wheelchair reaches the elevation end position of the platform, that is, the standby position or the lower floor, the locked state of the flap lock portion is released, and when the wheelchair is moved so that the flap can be shifted to the collapsed posture, the flap is pressed down by the wheels of the wheelchair, and the wheelchair can be raised and lowered onto the platform.

As another aspect of the present invention, the following evacuation apparatus can be configured: the flap lock portion includes a lock control body rotatably connected to the lifter, and a flap lock body rotatably connected to the lock control body and the flap, and the flap lock body and the lock control body are locked so that the angle of intersection cannot be changed with respect to a force for operating the flap to move toward the falling position in a locked state of the flap lock portion.

In this aspect, the flap lock portion includes a lock control body and a flap lock body, and when the lock control body is located at the lock position, the flap lock body is brought into the lock state in a state of being locked to the lock control body, and rotation of the flap toward the falling position side is restricted.

In this case, the hinge plate locking body is coupled to the lock control body and the hinge plate pin, which are pin-coupled to the lift table, and the hinge plate locking body and the lock control body are locked in a locked state so that the intersection angle cannot be changed, and thus the evacuation device can be configured with a simple configuration.

As another aspect of the present invention, the following evacuation apparatus can be configured: the lock control body is urged toward a lock position where the lock control body is locked with the flap lock portion in the locked state of the flap lock portion, the flap lock body is urged toward a lock position where the flap lock body is locked with the lock control body located at the lock position, and at a lift end position of the lift table, either the lock control body or the flap lock body is rotationally driven in a direction opposite to the other lock release direction by a release operation portion disposed at the lift end position, so that the locked state of the flap lock portion is released.

When the lift table reaches the lift end position, either the lock control body or the hinge plate lock body is driven in a direction to release the locked state of each other, that is, in a direction to the lock release position or in a direction to the lock release position by the release operation portion disposed at the lift end position. Thus, the wheelchair can be lifted and lowered by releasing the locked state of the flap lock section.

Further, during the up-and-down movement away from the up-and-down terminal position, the lock control body and the hinge plate lock body are urged toward the lock position side and the lock position side, respectively, and therefore, the states are shifted to the state of being locked by being locked to each other.

In addition, as another aspect of the present invention, the following evacuation apparatus can be configured: the evacuation opening is provided with a tilting body that is held at a position where a free end portion rides on the elevating platform when the elevating platform is located at the standby position, the tilting body is shifted to a hanging-down posture by lowering the elevating platform, the tilting body is returned to a fixed position by raising the elevating platform, and the tilting body is provided with a release operation portion that rotates the hinge plate lock body in a direction of releasing the locking with the lock control body when returning to the fixed position.

In this aspect, the tilt body is erected between the upper floor and the lift table when the lift table is in the standby position, and the free end thereof is placed on the lift table, so that the wheelchair can smoothly move on the tilt body even if there is a step or a gap between the upper floor and the lift table.

Further, the tilting body does not become an obstacle because it assumes a hanging posture when the lifting platform is lowered. Further, the inclined body abutting against the elevating platform in accordance with the movement of the elevating platform to the standby position receives a rotation moment from the elevating platform and automatically moves from the hanging posture to the fixed position, and the flap lock body is rotated to the locking release position during the movement operation to release the locked state of the flap lock portion.

In this case, if the evacuation device is configured such that the fixed roller is provided at the free end of the tilting body, the fixed roller being in contact with the lifting platform that is raised in the suspended posture and generating a rotational moment toward the fixed position side on the tilting body, the tilting body can be moved to the smooth fixed position in association with the raising of the lifting platform, and the configuration is simplified as compared with, for example, a case where the fixed roller is provided in a rod-shaped body that is coaxial with the tilting body.

In addition, as another aspect of the present invention, the following evacuation apparatus can be configured: the lock control body is provided with a detection protrusion which abuts against a lower floor surface when the lifting platform lands on a lower floor, and rotates the lock control body in a direction of releasing the locking with the hinge plate lock body.

In this aspect, the lock control body is provided with a detection projection, and when the lift table reaches the lower floor, the detection projection abuts against a lower floor surface as a release operation portion, and the lock control body is driven in the locking release direction with the hinge plate lock body to release the locked state.

Drawings

FIG. 1 is a view showing an evacuation device according to the present invention.

Fig. 2 is a diagram showing a state in which the lid is opened.

Fig. 3a is a cross-sectional view showing a modification of the housing.

Fig. 3B is an enlarged view of the portion 3B of fig. 3 a.

Fig. 4 is a plan view of the elevating platform.

Fig. 5 is an enlarged view of a portion 5A of fig. 4.

Fig. 6 is a perspective view showing a state in which a wheelchair is mounted on the elevating platform.

Fig. 7 is an enlarged view of a main portion of fig. 1.

Fig. 8 is a view showing a main part of the armrest in the laid-down posture.

Fig. 9a is a diagram showing the movement of the armrest, and shows immediately after the start of the transition to the standing posture.

Fig. 9b is a diagram showing the movement of the armrest, and shows the movement of the armrest immediately before the transfer operation to the standing posture is completed.

Fig. 9c is a diagram showing the movement of the armrest, showing the standing posture.

Fig. 9d is a diagram showing the movement of the armrest, showing the temporary holding posture.

Fig. 10a is a view showing a modification of the armrest, and shows immediately after the start of the transition to the standing posture.

Fig. 10b is a view showing a modification of the armrest, showing the temporary holding posture.

Fig. 10c is a view showing a modification of the armrest, showing the standing posture.

Fig. 11 is a perspective view showing the lock operation portion.

Fig. 12a is a front view showing the lock operation portion.

Fig. 12b is a rear view showing the lock operation portion.

Fig. 13 is a view showing the tilting body in a fixed state.

Fig. 14 is a view showing the tilting body in a suspended state.

Fig. 15a is a side view of the hinge plate showing the locked state.

Fig. 15b is a link structure diagram showing the hinge plate in the locked state.

Fig. 16a is a diagram showing the operation of the hinge plate, showing a grounding state.

Fig. 16b is a diagram showing the operation of the hinge plate, and shows the elevating platform immediately before the elevating platform reaches the standby position.

Fig. 17a is a view showing a modification of the tilting body, and is a perspective view of the projection forming portion.

Fig. 17b is a view showing a fixed state of the tilting body of fig. 17 a.

Fig. 18a is a view showing the operation of the tilting body of fig. 17a, showing a suspended state.

Fig. 18b is a diagram showing the operation of the tilting body of fig. 17a, and shows a state immediately before the shift to the fixed state.

Fig. 19 is a perspective view showing the conversion unit.

Fig. 20a is a diagram showing the operation of the hook member, showing the engaged state.

Fig. 20b is a diagram showing the operation of the hook member, and shows the state immediately after the locked state is released.

Fig. 20c is a diagram showing the operation of the hook member, and shows the state immediately before the shift to the unlocked state.

Fig. 20d is a view showing the operation of the hook member, showing the unlocked state.

Fig. 21 is a perspective view showing another embodiment of the elevating platform holding mechanism.

Fig. 22a is a diagram showing an operation of the hook member according to another embodiment, showing an engaged state.

Fig. 22b is a diagram showing the operation of the hook member according to the other embodiment, and shows the state immediately after the locked state is released.

Fig. 23a is a diagram showing the operation of the hook member of fig. 22, and shows a state in which the hook auxiliary member collides with the engaged portion due to the rise of the elevating platform.

Fig. 23b is a diagram showing the operation of the hook member of fig. 22, and shows a state immediately before the lifting table further ascends and the interference protrusion comes into contact with the engaged portion.

Fig. 24A is a view showing an operation of the conversion unit, and is a view taken in the direction 24A of fig. 19.

Fig. 24B is a view showing the operation of the conversion unit, and is a cross-sectional view from 24B to 24B in fig. 24 a.

Fig. 25a is a diagram showing the operation of the conversion section, and shows a state where the open handle is rotationally driven.

Fig. 25b is a diagram showing the operation of the conversion unit, and shows a state where the operation force on the lock operation unit is released.

Detailed Description

As shown in fig. 1 below, the evacuation device includes a housing 2a fitted and fixed to an opening opened in a ground 1 on the upper layer side to form an evacuation opening 2, a lid 14 for closing the evacuation opening 2, a guide support 15 provided upright on a ground surface 3 on the lower layer and having an upper end fixed to the evacuation opening 2, and an elevating platform 4.

As shown in fig. 1, the elevating platform 4 is driven to be elevated between a standby position held in the evacuation opening 2 and an evacuation position where it is lowered from the standby position along the guide post 15 and landed on the lower floor 3.

The guide stay 15 is a hollow pipe having an appropriate buckling strength, and is formed by, for example, extrusion molding of aluminum. The lower end of the guide support 15 is fixed to the floor panel of the lower floor, and the upper end is fixed to the housing 2 a.

In addition, a slot 15a is formed in one side wall surface of the guide post 15. As shown in fig. 1, the tooth grooves 15a are formed in a plate material of high strength such as stainless steel at predetermined intervals to form concave portions 15b along substantially the entire length of the guide stay 15.

In this case, as shown in fig. 3, if the recess 2b is formed at the lower end of the peripheral edge of the casing 2a, it is possible to prevent the generation of a collision sound between the lower cover and the lower edge of the casing 2a when the elevating platform 4 is raised from the retracted position and reaches the standby position.

As shown in fig. 4 and 5, a weight 16 hung from a wire outside the drawing is accommodated in the hollow portion of the guide post 15, and when the user gets down from the elevating platform 4 after the elevating platform 4 reaches the lower floor, the elevating platform 4 is returned to the standby position by the weight of the weight 16.

As shown in fig. 6, the elevating platform 4 is formed to have a sufficient width and a sufficient load resistance that a user of the wheelchair 13 can sit, and the wheelchair 13 can enter the wheelchair mounting area 4a at the center portion from the rear edge portion on the left side in fig. 4 and 6. An assist space 4b for assisting a rider to ride is formed obliquely rearward of the wheelchair mounting area 4 a.

In the present description, the direction of travel of the wheelchair 13 (the right side in fig. 4) is referred to as the "front", the riding side is referred to as the "rear", and the vertical direction is referred to as the "side" in the drawings.

As shown in fig. 4 and 5, a column insertion opening 4c through which the guide column 15 is inserted is opened at each side edge portion of the elevating platform 4, and a descent control device 17 for descending the descending speed of the elevating platform 4 is mounted in the front and rear through the column insertion opening 4 c. A pinion 18 that meshes with the concave portion 15b of the guide post 15 is fixed to a rotating shaft (C17) of the descent control device 17, and the descent speed of the elevating platform 4 is reduced by decelerating the number of revolutions of the pinion 18 by the descent control device 17.

Further, rollers 19 are disposed on the elevating table 4 so as to abut against the front-rear direction wall surface and the outer side wall surface of the guide stay 15, and the wobbling or the like during the elevating is restricted.

Further, a handrail 20 is disposed at a front edge portion of the elevating platform 4. The handrail 20 is formed by bending a pipe body, and has a U-shape including a crossbar 20a and vertical bars 20b extending in a right-angle direction from both ends of the crossbar 20 a. The armrest 20 is attached to the elevating platform 4 by rotatably coupling the free end portion of each vertical rod 20b to an armrest bracket 21 fixed to the elevating platform 4.

The armrest 20 is rotatably movable between a collapsed position shown in fig. 1 along the surface of the lifting/lowering table 4 and an erected position shown in fig. 2 in which the crossbar 20a is pulled upward. The armrest 20 is urged toward the standing posture, and the cover 14 is closed to maintain the collapsed posture, and the armrest automatically shifts to the standing posture in association with the opening operation of the cover 14.

Fig. 7 and 8 show the armrest 20 in detail. As shown in fig. 8, each of the vertical rods 20b of the armrest 20 is coupled to the armrest bracket 21 at a position slightly above the lower end thereof in order to function as a lock operation piece 20c, and is biased by a torsion spring 22 in the standing posture side, i.e., in the clockwise direction in fig. 8.

As shown in fig. 8, the armrest bracket 21 is provided with a long hole-shaped movement path 23 connecting a lock position, a lock release position, and a temporary holding position, which will be described later, and both ends of a rod-shaped armrest lock body 24 that is bridged between the two armrest brackets 21 are inserted into the movement path 23.

As shown in fig. 9c, the above-described lock position is set at a position where the armrest locking body 24 blocks the movement path of the lock operation piece 20c toward the collapsed posture when the armrest 20 is in the raised posture, and the unlock position where the armrest locking body 24 is located in fig. 9b is set at a position where the armrest locking body 24 does not interfere with the movement trajectory of the lock operation piece 20 c.

In fig. 9d, the temporary holding position where the armrest locking body 24 is located extends rearward from the unlocked position, and is provided at a position where the end of the non-interference path 23a, which does not interfere with the movement locus of the lock operation piece 20C, enters again a region that interferes with the movement locus of the lock operation piece 20C, and in this example, the notch-shaped recess 25 into which the armrest locking body 24 can be fitted is formed by extending in the direction of the rotation center (C20) of the armrest 20.

In order to determine the position of the armrest lock body 24 in the moving path 23, the armrest lock body 24 is coupled to a first tension spring 26 having one end fixed to the rotation center (C20) of the armrest 20 and a second tension spring 27 having one end fixed to the distal end portion of the armrest bracket 21.

Therefore, in this example, when the lid 14 is opened, the armrest 20 moves from the collapsed posture shown in fig. 8 to the upright posture by the restoring force of the torsion spring 22. First, as shown in fig. 9a, the lock operation piece 20c interferes with the armrest locking body 24 held in the locked position as the armrest locking body is shifted to the upright posture, and as the armrest locking body 24 is moved to the upright posture, the armrest locking body 24 is pushed out to the unlocked position as shown in fig. 9 b.

Thereafter, when the armrest 20 further moves toward the standing posture, the armrest locking body 24 returns to the locking position by the restoring force of the first and second tension springs 26 and 27 as shown in fig. 9 c.

When the armrest 20 is in the standing posture, as shown in fig. 9, the armrest locking body 24 in the locked position restricts the movement of the lock operation piece 20c in the direction of the falling position by the wall surface 23b of the movement path 23, and therefore, even if a force in the falling direction is applied to the armrest 20, the armrest 20 does not fall down.

As shown in fig. 9d, when the armrest locking body 24 is moved from this state to the temporary holding position beyond the unlocked position, the armrest locking body 24 is pressed against the terminal wall of the temporary holding position by the first tension spring 26, and the movement in the locking position direction by the biasing force of the second tension spring 27 is blocked by the restricting wall 25a formed by the wall surface of the recess 25, and as a result, the armrest locking body does not come off the temporary holding position.

Further, as shown in fig. 4 and 5, since the center portion of the armrest locking body 24 is open to the rear of the elevating table 4, the armrest locking body 24 can be moved to the end of the non-interference path 23a only by pushing the center portion of the armrest locking body 24 rearward, and then can be moved to the temporary holding position by the restoring force of the first tension spring 26 when the pushing operation is finished.

When the armrest 20 is tilted from the state shown in fig. 9d, that is, from the state in which the armrest 20 is in the standing position and the armrest locking body 24 is in the temporary holding position, the armrest locking body 24 is pushed out from the temporary holding position to the non-interference path 23a by the lock operation piece 20c, and then is pulled back to the locking position by the restoring force of the second tension spring 27.

Therefore, in this example, after the evacuation device is used, the armrest lock body 24 is moved to the temporary holding position in a state where the elevating platform 4 is returned to the standby position, and then the armrest 2 can be moved to the collapsed position only by closing the lid body 14.

In this example, as shown in fig. 8, one end of the torsion spring 22 is inserted into the elevating platform 4 through the armrest bracket 21 to the attachment piece 21a of the elevating platform 4, but as shown in fig. 10, it can be locked to the rear folded piece 21b of the armrest bracket 21.

In the following examples, components substantially the same as those in the above embodiments are denoted by the same reference numerals in the drawings, and descriptions thereof are omitted.

A lock operation portion 29 for operating a lock member 28 described later is disposed on the armrest 20. The lock operation portions 29 are provided at the center portion of the crossbar 20a of the armrest 20, and are provided in a pair at symmetrical positions with respect to the center position of the crossbar 20a so that even if any of the upper limbs of the person to be assisted sitting on the wheelchair 13 is not free, or even if the person to be assisted gets on any of the auxiliary spaces 4b, the person to be assisted can operate over the shoulders of the person to be assisted.

The pair of lock operation portions 29 are formed with gear-shaped portions 29a that mesh with each other so that the inner wires 30b described later can be operated in synchronization even when any of the lock operation portions 29 is operated.

As shown in fig. 6 and 11, each lock operation unit 29 is arranged in a rod shape so that the lock releasing operation of the lock member 28 is performed by pressing down in a downward direction so that the helper can operate the lock operation unit 29 by only mounting an arm on the lock operation unit 29 and receiving the weight, or so that the helper can operate the lock operation unit by only pressing the lock operation unit over the shoulder of the helper.

The operation of the lock member 28 by the lock operation portions 29 is performed by using the wire device 30 that movably inserts the inner wire 30b into the outer cable 30a, and as shown in fig. 11 and 12, the inner wire 30b is connected to each of the lock operation portions 29 that can be operated to rotate about the rotation center (C29).

In order to use the wire device 30 as a pull type, the inner wire 30b is inserted into the lock operation portion 29 on the opposite side of the lock operation portion 29 to be connected. As shown in fig. 11, the wire device 30 connected to the lock operation portion 29 is pulled into the internal space of the tubular handrail 20 from the wire introduction opening 20d provided in the handrail 20, and then pulled out of the handrail 20 again from the wire introduction opening 20e as shown in fig. 5, and is connected to a conversion portion 31 described later, wired along the vertical rod 20b of the handrail 20 at an appropriate height on the surface of the elevating table 4.

The hinge plate 5 is connected to the rear end portion of the wheelchair mounting area 4a of the elevating platform 4 so as to be rotatable in the up-down direction about the rotation axis (C5), and has an inclined surface 4d formed at the rear end thereof for absorbing a step difference with the lower floor surface 3 in a state where the elevating platform 4 is grounded on the lower floor surface 3.

As described later, the hinge plate 5 is formed so as to land on the lower floor 3 and unlock the same to allow downward rotation, and when the wheelchair 13 is retreated after the landing on the lower floor 3, the hinge plate 5 is rotated so as to be pushed down, and the free end portion thereof rides on the inclined surface 4d, and can enter the lower floor 3 in this state.

In order to facilitate the installation of the wheelchair 13 in the standby position on the upper side, the inclined body 11 is connected to the evacuation opening 2.

As shown in fig. 6, the tilting body 11 is a plate body having a width dimension of a degree that the wheelchair 13 can pass through, and rotates about a rotation center (C11) between a fixed position where the free end portion shown in fig. 13 is mounted on the elevating platform 4 and a hanging posture in a state of being hung from the evacuation opening 2 shown in fig. 14.

A fixed roller 12 and a support roller 11a are coupled to the free end of the inclined body 11. As shown in fig. 13, at the fixed position, the support rollers 11a ride on the inclined surface 4d and bear the load of the wheelchair 13 passing through the inclined body 11.

As shown in fig. 13, the hinge plate 5 is placed on the free end of the inclined body 11 when the elevating platform 4 is in the standby position, and in this state, the inclined body 11 is bridged between the upper floor 1 and the surface of the elevating platform 4, thereby eliminating the step difference between the upper floor 1 and the surface of the elevating platform 4.

When the lifting platform 4 is lowered in this state, the tilting body 11, which is out of support by the tilting surface 4d, rotates downward by its own weight and shifts to a hanging posture as shown in fig. 14.

The fixed roller 12 is disposed so as to generate a rotational operation force in a fixed installation direction, i.e., counterclockwise in fig. 14, on the inclined body 11 when the inclined body 11 is in a suspended posture and is in contact with the upper surface of the inner end portion of the auxiliary space 4b of the ascending elevating platform 4.

Therefore, in this example, when the elevating table 4 is moved to the standby position side again after being lowered, first, the fixed roller 12 comes into contact with the upper surface of the inner end portion of the auxiliary space 4b of the elevating table 4, and the tilting body 11 is raised together with the elevating table 4 and returned to the fixed position, and returns to the initial state shown in fig. 13.

Further, a buffer 32 is attached between evacuation opening 2 and the back surface of inclined body 11 in order to absorb the impact when elevating table 4 collides with fixed roller 12.

As described above, the hinge plate 5 is connected to the rear end portion of the wheelchair mounting region 4a of the elevating platform 4 so as to be rotatable in the vertical direction, rotates between the standing posture shown in fig. 14 and the lying posture in which the free end thereof rests on the inclined surface 4d, and is urged toward the standing posture by the torsion spring 33 wound around the rotating shaft (C5). The angle of the hinge plate 5 in the standing posture is determined to a degree that the angle functions as a wheel stopper of the wheelchair 13 on the platform 4, taking into account the longitudinal dimension of the hinge plate 5 in the front-rear direction.

The flap 5 is controlled by the flap lock portion 6 to maintain the standing posture, and is locked to maintain the standing posture when the elevating platform 4 is elevated, that is, other than when the stand-by position is at the standby position and the floor surface 3 is at the landing position, and is unlocked to allow the flap to move to the falling posture side when the elevating platform 4 is at the elevating terminal position, that is, when the stand-by position is at the landing position on the floor surface 3.

As a result, while the elevating platform 4 is being lowered, the wheelchair 13 is prevented from rolling off the elevating platform 4 while maintaining the upright posture of the hinge plate 5, and the movement to the collapsed posture is allowed without obstructing the passage of the wheelchair 13 at the elevating end position of the elevating platform 4, that is, at the standby position and at the time of landing on the lower floor 3.

As shown in fig. 15, the flap lock portion 6 includes a lock control body 7 rotatably connected to the lifter base 4 and a flap lock body 8 rotatably connected to the free end portion of the flap 5 and the lock control body 7, and lock stoppers 7a and 8a that are locked to each other in a locked state are formed on each of the flap lock portions.

The lock control body 7 is rotatable about a rotation center (C7) between the lock position and the unlock position, and the hinge plate lock portion 6 is moved by the hinge plate lock body 8 to the lock stopper 7a locking the lock stopper 8a to the lock control body 7 located at the lock position, and is brought into the lock state.

Further, a torsion spring 34 is wound around a rotation shaft (C8M) connecting the lock control body 7 and the hinge plate lock body 8, and as a result, the hinge plate lock body 8 connected to the hinge plate 5 so as to be rotatable about the rotation center (C8) is urged toward the locking position by an urging force generated by the torsion spring 33, and the lock control body 7 is urged toward the locking position by an urging force of the torsion spring 34 attached between the hinge plate lock body 8 and the lock control body 7.

As shown in fig. 15a, the coupling position of the hinge plate lock body 8 and the lock control body 7, the coupling position of the lock control body 7 to the lifter base 4, and the locking position of the lock limiters 7a and 8a in the locked state are set so as to change the angle of intersection between the hinge plate lock body 8 and the lock control body 7 when the movement operation force in the falling direction of the hinge plate 5 is applied to the coupling point (C8) with the hinge plate lock body 8 by the locking of the lock limiters 7a and 8 a.

That is, in fig. 15b, when a rotational operation force in the falling direction is applied to the hinge plate 5, a force (F) acts on the connecting point between the hinge plate locking body 8 and the hinge plate 5, and a counterclockwise rotational force is generated in the lock control body 7. The locking positions of the lock stoppers 7a and 8a are set at positions that restrict a decrease in the angle of intersection (θ) between the lock control body 7 and the hinge plate lock body 8 on the acute angle side due to the counterclockwise rotation of the lock control body 7, and as a result, the lock control body 7 and the hinge plate lock body 8 operate substantially as an integral body with respect to the load in the falling direction of the hinge plate 5.

The integration of the lock control body 7 and the hinge plate lock body 8 allows the hinge plate 5, the integrated body of the lock control body 7 and the hinge plate lock body 8, and the lift table 4 to constitute a three-stage link, and the hinge plate 5 can maintain the standing posture without freedom of movement.

The lock control body 7 is provided with a detection projection 10 extending downward from a connecting point to the elevating platform 4, and the lock control body 7 is rotated counterclockwise (lock release direction) in fig. 15a when the elevating platform 4 lands on the lower floor 3.

Therefore, in this example, when the lift table 4 descends and lands on the lower floor surface 3 functioning as the release operation portion, the detection projection 10 is pressed against the lower floor surface 3 and rotates clockwise in fig. 15a, that is, in the lock release direction. When the lock control body 7 is rotated to the lock release position, as shown in fig. 16a, the locking of the lock stoppers 7a and 8a of the hinge plate lock body 8 is released, and the restriction of the connection point (C8M) between the lock control body 7 and the hinge plate lock body 8 is released, so that the hinge plate lock body 8 can be rotated, and the hinge plate 5 can be moved in the falling direction.

When the wheelchair 13 moves in this state, the hinge plate 5 is pushed in the direction of the arrow in fig. 16a by the wheels, and the free end thereof is in a state of riding on the inclined surface 4d, so that the wheelchair 13 can get off.

On the other hand, when the elevating platform 4 is raised and reaches the vicinity of the standby position, the tilting body 11 shifts from the hanging-down posture to the fixed position as described above.

As shown in fig. 13, a release operation portion 9 for moving the hinge plate lock body 8 in the locking release direction with respect to the lock control body 7 when moving to the fixed position is provided at the free end portion of the tilting body 11. In this example, the release operation portion 9 is formed in a projection shape that presses the arc-shaped pressed side 8b formed on the hinge plate lock body 8.

As shown in fig. 16b, as the lift table 4 approaches the standby position, the release operation portion 9 approaches the pressed edge 8b of the hinge plate lock body 8, and the pressed edge 8b is pressed forward by the release operation portion 9.

The lock stopper 8a of the hinge plate lock body 8, which is pushed forward by the push side 8b, is released from the lock of the lock stopper 7a of the lock control body 7 by the release operation portion 9, and the lock control body 7 is driven in the direction of the unlock position, and the hinge plate 5 is driven in the direction of the collapse position.

The pressed edge 8b of the flap lock 8 is set so that, after returning to the fixed position of the tilting body 11, the free end of the flap 5 rides on the tilting body 11 and, in this state, the rotational drive with respect to the flap lock 8 is stopped, and as described above, the wheelchair 13 can smoothly ride on the ground 1 on the upper side through the tilting body 11 and the flap 5 in the state where the platform 4 is returned to the standby position.

Fig. 17 and 18 show modifications of the tilting body 11. In the present modification, the inclined body 11 is composed of an inclined main body 45 having a front end to which the fixed roller is coupled, and a protrusion forming portion 46 fixed to a front end of the hinge plate main body 45. As shown in fig. 17a, the protrusion forming portion 46 is formed by rotatably coupling the roller-shaped release operation portion 9 to the distal end of the housing 46a to which the support roller 11a is coupled. Both ends of the release operation portion 9 are inserted through a long hole 46b provided in the housing 46a, are prevented from coming off by a nut or the like, and are urged forward by a torsion spring 46 c.

Therefore, in the present modification, when the elevating platform 4 is located at the standby position, the roller-shaped release operation portion 9 abuts against the pressed edge 8b of the hinge plate lock body 8, as in the above-described embodiment.

Further, when the vertical lift table 4 is raised from the hanging posture shown in fig. 18a, the relative position between the vertical lift table 4 and the tilting body 11 is deviated from the set value due to the accumulation of dimensional errors, and the operation force from the release operation unit 9 to the pressed side 8b may become short, for example, in the direction toward the rotation center (C8) of the flap lock body 8 or the length (arm) of the perpendicular line depending from the rotation center (C8) on the direction line of the operation force, and in this case, a sufficient rotation operation force cannot be applied to the flap lock body 8, and therefore, there is a possibility that smooth operation is hindered.

However, as in the present modification, if the release operation portion 9 is freely movable in the elongated hole 46b, even in the case described above, the release operation portion 9 moves rearward along the elongated hole 46b, and the contact angle to the pressed side 8b changes, and the arm of force increases, so smooth operation can be ensured.

The lifting platform 4 configured as described above is held at the standby position by the lifting platform holding mechanism 35.

As shown in fig. 19, the elevating table holding mechanism 35 is composed of a locked portion 36 formed around the standby position, a hook member 37 engaged with and disengaged from the locked portion 36, and a lock member 28 for controlling the engaged and disengaged state of the hook member 37.

In this example, the engaged portions 36 are formed by U-bolts, and a total of four are fixed to the front and rear wall surfaces of a pair of or two guide stays 15 (see fig. 4) disposed at bilaterally symmetrical positions. The hook members 37 and the lock members 28 are disposed on the elevating platform 4 in correspondence with the engaged portions 36, and two pairs, four pairs in total, of the hook members 37 and the lock members 28 operate in the operating surface parallel to the front and rear wall surfaces of the guide support 15 on the guide support 15.

The hook member 37 is rotatable around a rotation center (C37) between an engagement position shown in fig. 20a and an engagement release position shown in fig. 20d, and includes an engagement hook portion 37a engaged with the engaged portion 36 at the engagement position at an upper end portion, and an interference protrusion 37b at a position facing the engagement hook portion 37 a.

As shown in fig. 20d, the interference projection 37b is disposed on a relative movement path of the engaged portion 36 when the hook member 37 is located at the engagement release position, that is, a relative movement path of the engaged portion 36 when the elevating platform 4 is elevated.

Therefore, in this example, when the elevating platform 4 is raised from the state shown in fig. 20d, first, the engaged part 36 collides with the interference protrusion 37b of the hook member 37, and the hook member 37 is rotationally driven to the engagement position. By the rotation of the hook member 37 to the locking position, the hook portion is positioned above the locked portion 36 and locked to the locked portion 36 as shown in fig. 20 a.

Further, a hook side projection 37c is provided projecting from a side edge of the hook member 37 at the locking release position. The engagement surface between the hook-side protrusion 37C and the lock-side protrusion 28C described later is formed by an arc surface centered on the rotation center (C28) of the lock member 28.

In the locked state with the locked portion 36, a rotational force in the locking releasing direction is generated in the hook member 37 by the weight of the elevating platform 4, and the lock member 28 is disposed to maintain the locked state against the rotational force.

The lock member 28 is disposed adjacent to the engagement release side edge of the hook member 37, and is rotatable between a lock position shown in fig. 20a and an engagement release position shown in fig. 20d, and a lock side projection 28c provided to project from the side edge of the hook member 37 is engaged with a hook side projection 37c of the hook member 37 in the lock position. The lock member 28 and the hook member 37 are coupled by a tension spring 38, and the tension spring 38 urges the lock member 28 toward the lock position when the hook member 37 is at the locking position.

When a rotational force in the direction of the engagement release position (clockwise in fig. 20 a) is generated in the hook member 37 in a state where the lock-side projecting portion 28C is engaged with the hook-side projecting portion 37C, a compressive force toward the rotation center (C28) is generated in the lock member 28, and the hook contact portion 28a formed on the side edge of the hook member 37 comes into contact with the hook member 37.

The position of the hook contact portion 28a in contact with the hook member 37 is set to a region where the lock member 28 approaches when the hook member 37 moves to the engagement release position, that is, in this example, above the rotation center (C28) of the lock member 28.

Therefore, in this example, even if a rotational force in the direction of the engagement release position is generated in the hook member 37 due to the load of the elevating platform 4, the hook member 37 does not rotate and the engagement state, that is, the holding state of the elevating platform 4 to the standby position is maintained only because the pressure contact force between the lock side projection 28c and the edge of the corresponding hook member 37 is increased.

When the lock member 28 is rotated from this state to the unlock position, the lock side protrusion 28c is unlocked from the hook side protrusion 37c while moving on the arc surface of the hook side protrusion 37c, and the vertical movement table 4 starts to descend. As shown in fig. 20b and 20c, the hook member 37 is released from engagement with the engaged portion 36, and the hook member 37 is further pulled toward the engagement release position side by the tension spring 38 in a state where the lock member 28 is held at the engagement release position, so that the hook-side protrusion 37c of the hook member 37 is engaged with the step portion 28b of the lock member 28.

This state is an unlocked state, and when the hook member 37 is engaged with the step portion 28b, the movement path of the lock member 28 toward the lock position is blocked by the hook member 37, and the unlocked state is maintained.

As described above, when the lift table 4 is then raised and the hook member 37 is engaged with the engaged portion 36, the lock member 28 is moved to the lock position by the tension spring 38, and then the lock state is maintained.

Fig. 21 to 23 show a modification of the elevating table holding mechanism 35. In fig. 21 to 23, the same reference numerals are given to the same components as those of the above-described embodiment, and the description thereof is omitted.

In the present modification, the tooth grooves 15a are formed in the front and rear wall surfaces of the guide post 15, and the pinion gear 18 of the descent control device 17 meshes with the tooth grooves 15a formed in the front wall surface shown by the arrow in fig. 21. Since the tooth grooves 15a are arranged on the short side portions, which are the front and rear wall surfaces of the guide stay 15, the short side portions have higher rigidity and smaller deflection than the long side portions, and therefore, the accuracy of engagement with the pinion gear 18 is increased, smooth operation is possible, and the strength of the entire structure can be improved.

In fig. 21, 16a denotes a wire for hanging the weight 16, and 16b denotes a pulley.

The lifter holding mechanism 35 operates in a plane parallel to the wall surface adjacent to the wall surface of the guide post 15 on which the slot 15a is formed, and can engage with and disengage from the engaged portion 36.

As shown in fig. 22, the elevating platform holding mechanism 35 of the present modification is provided with a hook auxiliary member 47 in addition to the above-described hook member 37, lock member 28, and tension spring 38. The hook member 37 and the lock member 38 are provided with a hook-side protrusion 37C and a lock-side protrusion 28C and are rotatably connected to the lift table 4 around the rotation center (C37, C28) in the same manner as in the above-described embodiment, and the lock members 28 are connected to each other by an operation rod 39 in the same manner as in the above-described embodiment.

The hook auxiliary member 47 is rotatable coaxially with the hook member 37 relative to the hook member 37, and includes a hook-shaped contact projection 47a at a rear end portion thereof, which is capable of contacting the engaged portion 36, and an operation wall 47b at a front end portion thereof, and has an elongated escape hole 47c at an intermediate portion thereof.

The long escape hole 47C is formed in an arc shape centered on the rotation center (C37) of the hook member 37, and has a curvature allowing insertion of a rotation shaft forming the rotation center (C28) of the lock member 28.

The operation wall 47b is located above the operation projection 28d projecting from the lock member 28, and is formed at a position capable of abutting against the operation projection 28 d.

As shown in fig. 22a, when the hook member 37 is in the engaged state, the contact projection 47a of the hook auxiliary member 47 is positioned slightly above the engaged portion 36. When the hook member 37 is released from being locked to the locked portion 36 and the elevating platform 4 starts to descend, the contact protrusion 47a of the hook auxiliary member 47 comes into contact with the locked portion 36, and as shown in fig. 22b, the rotation shaft of the lock member 28 moves relatively in the escape long hole 47c, and the hook auxiliary member 47 rotates clockwise.

As the hook auxiliary member 47 rotates, the operation wall 47b presses the operation projection 28d of the lock member 28, and thus the lock member 28 is rotationally driven to the stroke end position on the locking release side.

Further, the hook member 37 and the hook auxiliary member 47 are urged counterclockwise by an unillustrated torsion spring, and when the engagement by the hook member 37 is released and the elevating platform 4 is lowered, the initial posture of fig. 22a is returned.

On the other hand, when the elevating platform 4 is raised, as shown in fig. 23a, first, the abutting projection 47a of the hook auxiliary member 47 abuts against the engaged portion 36 and rotates clockwise. As the hook auxiliary member 47 rotates, the lock member 28 presses the operation projection 28d downward via the operation wall 47b of the hook auxiliary member 47, and rotates toward the locking release position side as shown in fig. 23b, the interference projection 37b of the hook member 37 abuts against the locked portion 36, and then the hook member 37 moves toward the locking position by the force applied to the interference projection 37 b.

As described above, in the present modification, when the elevating platform 4 is moved to the standby position while being raised, since the collision between the hook member 37 and the engaged portion 36 does not occur, the occurrence of damage to the hook member 37 can be reliably prevented.

As described above, the lock member 28 is operated by the switching unit 31 connected to the lock operation unit 29 disposed on the armrest 20.

As shown in fig. 19, the conversion unit 31 includes an operation lever 39 and an open handle 40 that are connected between a pair of lock members 28 disposed to face each other and are disposed along a wall surface formed by the tooth grooves 15a of the guide stay 15. A collar 41 is attached to the longitudinal center portion of the operating rod 39, the collar 41 is formed in a tubular shape through which the operating rod 39 is movably inserted, and flanges 41a are formed at both ends.

As shown in fig. 19 and 25, the open handle 40 includes a mounting piece 40a formed by bending a plate material into an L-shape and an upright piece 40b, and is rotatably coupled to a handle bracket 42 fixed to the elevating table 4 at the mounting piece 40 a.

The open handle 40 is disposed in a posture in which the rising piece 40b is orthogonal to the operating rod 39, and as shown in fig. 24b, a rod locking portion 43 having a long hole shape and provided with an arc-shaped locking end 43a which is in contact with the outer periphery of the collar 41 substantially at half the circumference is formed on the rising piece 40 b. A lower open portion 43b for providing an entrance for inserting the collar when the lever locking portion 43 is attached to the collar 41 is formed at an end opposite to the locking end 43 a.

As shown in fig. 24a, the rotation center (C40) of the open handle 40 is arranged slightly toward the center of the elevating platform 4 from the actuating lever body 39, and the inner wire 30b of the wire device 30 is connected to the opposite side of the rotation center.

The wire device 30 is wired parallel to the vertical rod 20b of the armrest 20, i.e., the operating rod body 39, at an appropriate height on the elevating platform 4 along the surface of the elevating platform 4, and when the lock operation portion 29 of the armrest 20 is operated, the inner wire 30b is pulled in the direction of the lock operation portion 29, and as shown in fig. 25a, the open handle 40 rotates about the rotation axis (C40). When the open handle 40 is rotated, the locking end 43a of the lever locking portion 43 moves forward, and the locked end 43a presses the collar 41 and the operating lever 39 inserted into the collar 41 to move from the initial position toward the center of the lift table 4 by a predetermined distance (δ).

The movement distance (δ) coincides with the operation stroke from the lock position to the unlock position of the lock member 28, and as a result, the lock member 28 moves to the unlock position, the locked state of the hook member 37 to the locked portion 36 is released, and the elevator platform 4 starts to descend.

Further, the flange 41a of the collar 41 is urged toward the initial position by the compression spring 44, and when the operation force on the lock operation portion 29 is released after the release operation with respect to the lock member 28, the operation force in the initial position direction is generated in the collar 41 by the restoring force of the compression spring 44.

Since the handle bracket 42 is provided obliquely so that the straight portion 43c (see fig. 24b) of the lever locking portion 43 continuous with the locking end 43a is slightly inclined in addition to the component in the vertical direction at the time of operation of the lock member 28, the collar 41 is returned to the initial position by the straight portion 43c of the lever locking portion 43, and the open lever 40 is returned to the initial position in response thereto (see fig. 25 b). By returning the open handle 40 to the initial position, the inner wire 30b of the wire device 30 is also driven to the initial state side, and the lock operation portion 29 is also returned to the initial state.

After that, when the hook member 37 performs the locking operation with respect to the locked portion 36, the lock member 28 moves to the lock position side as described above, and the operating rod 39 moves accordingly, and the converter 31 returns to the initial state shown in fig. 19.