阅读说明：本技术 夯地装置 (Tamping device ) 是由 水口博 石塚邦彦 于 2019-05-13 设计创作，主要内容包括：本发明提供一种夯地装置,其具有平整板和驱动平整板的马达,在夯地装置的上部半体具备支承部,该支承部与把手独立地经由防振构件安装于夯地装置的上部半体,在支承部安装有用于驱动马达的电装件。(The invention provides a tamping device, which comprises a leveling plate and a motor for driving the leveling plate, wherein the upper half body of the tamping device is provided with a supporting part, the supporting part and a handle are independently mounted on the upper half body of the tamping device through a vibration-proof component, and an electric device for driving the motor is mounted on the supporting part.)

1. A ramming device having a leveling plate and a motor driving the leveling plate, characterized in that,

the upper half body of the tamping device is provided with a support part which is mounted on the upper half body of the tamping device through a vibration-proof component independently from a handle,

an electric device for driving the motor is attached to the support portion.

2. The tamper according to claim 1, wherein the vibration preventing member is provided between the upper half body and the support portion independently from the vibration preventing member of the handle.

3. The tamping device according to claim 1 or 2, wherein said support portion has a rotation axis in a coaxial direction with said handle.

4. The tamping device according to any of the claims 1 to 3, wherein the handle is configured as a frame when the tamping device is viewed in plan,

the support portion is disposed inside the frame of the handle.

5. The tamping device according to any one of claims 1 to 4, further comprising a weight adjustment portion on a side opposite to a position where the electric equipment is attached via the vibration preventing member of the support portion.

6. The tamping device according to any of the claims 1 to 5, wherein the bearing is arranged at a lower position than the handle, which covers at least a part of the electrical component, when the tamping device is viewed from a side.

7. The tamping device according to any of the claims 1 to 6,

the support portion has at least a plate which,

the battery contained by the electrical device is mounted to the upper surface of the plate,

the other electric components included in the electric device are mounted on a lower surface of the board, which is a rear surface of the upper surface.

8. The tamping device according to any of the claims 1 to 7,

the tamper device also has a reinforcement member joining the handle and the upper half,

the reinforcing member covers at least a part of the electric component mounted on the support portion.

9. The ramming apparatus of claim 8, wherein the reinforcing member covers at least a portion of the motor.

Technical Field

The invention relates to a ground tamping device for tamping the ground by up-and-down vibration of a leveling plate.

Background

Patent document 1 discloses, as a structural example of a ground-tamping device, a battering ram device including a driving engine and a handle on which a fuel tank is disposed at an upper end portion of a battering ram body. When performing the leveling work, the operator applies vertical vibration to the leveling plate provided at the lower end portion of the tamper body while holding the grip portion of the handle provided at the upper end portion of the tamper body, and levels the ground surface by the vibration.

In addition, with recent improvement of environmental regulations, there is an increasing demand for an electric ramming device that uses a motor as a driving source instead of an engine and replaces a fuel tank with a battery.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2002-363915

Disclosure of Invention

Problems to be solved by the invention

When the device structure is assumed to be motorized, electric devices such as batteries have low durability against vibration, and therefore, it is necessary to suppress vibration of the electric devices. Further, in order to reduce the burden on the operator due to the wrist vibration transmitted to the grip portion of the handle during the leveling work, it is necessary to suppress the vibration of the handle.

In the device structure of patent document 1, when an electric device such as a battery is disposed on the handle instead of the fuel tank, vibration-proof measures for reducing both vibration of the electric device and vibration of the grip portion may need to be applied to the handle.

However, since the positions and the masses of the electric device and the grip portion on the handle are different from each other, the vibration-proof measure for the electric device and the vibration-proof measure for the grip portion need to be different from each other. Therefore, it is difficult to apply different vibration-proof measures to the handle corresponding to the electric component and the grip portion of the handle.

The invention aims to provide a tamping device which can reduce the vibration of an electric device independently of a handle.

Means for solving the problems

A tamping device according to one embodiment of the present invention includes a leveling plate and a motor for driving the leveling plate,

the upper half body of the tamping device is provided with a support part which is mounted on the upper half body of the tamping device through a vibration-proof component independently from a handle, and an electric device for driving the motor is mounted on the support part.

Effects of the invention

According to the present invention, it is possible to provide a tamping device capable of reducing vibration of an electric device independently of a handle.

Other features and advantages of the present invention will become apparent from the following description with reference to the accompanying drawings. In the drawings, the same or similar structures are denoted by the same reference numerals.

Drawings

Fig. 1 is a diagram showing a configuration example of a ramming device according to a first embodiment.

Fig. 2 is a diagram showing the structure of the support portion.

Fig. 3 is a diagram illustrating a mounting structure of an electric device.

Fig. 4 is a view of the tamping device according to the first embodiment as viewed from above.

Fig. 5 is a diagram showing a configuration example of the ramming device according to the second embodiment.

Fig. 6 is a diagram illustrating a battery attachment/detachment structure.

Fig. 7 is a diagram showing a modification 1 of the ramming device according to the first embodiment.

Fig. 8 is a diagram showing a modification 2 of the ramming device according to the first embodiment.

Fig. 9 is a diagram showing a modification 3 of the ramming device according to the first embodiment.

Fig. 10 is a diagram showing a configuration example of a PDU casing used in modification 3.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The constituent elements described in this embodiment are merely examples, and are not limited to the following embodiments.

[ first embodiment ]

(structural example of tamping device: battering ram device)

Fig. 1 is a diagram showing a structure of a tamper device 40A as a structural example of the tamping device according to the first embodiment. In fig. 1, the right side of the drawing is the front of the apparatus, the left side of the drawing is the rear of the apparatus, and the direction intersecting the front-rear direction is the up-down direction of the apparatus. As shown in fig. 1, the battering ram device 40A includes: a motor 10 functioning as a drive source; an upper portion (hereinafter, also referred to as "upper half body 41 b") located above a vibration isolating member 41c described later; an extensible vibration-proof member 41 c; a lower portion (hereinafter, also referred to as "lower half body 41 a") located below the vibration preventing member 41 c; and a leveling plate 42. The flat plate 42 is coupled to the lower half 41a, and the lower half 41a is coupled to the upper half 41b via a vibration-proof member 41 c.

The upper half body 41b is provided with a handle 45 and a support portion 70 that is separate from the handle 45. The support portion 70 is attached with an attachment plate 54 to which electric components such as a battery and a PDU (power drive unit) can be attached. A battery 51 that supplies power to the motor 10 is attached to the upper surface of the attachment plate 54 via a holding tray 53. Further, a PDU case 56 in which a PDU55 for controlling the driving of the motor 10 is disposed is attached to the lower surface of the attachment plate 54. The mounting structure of these electric components will be described in detail later with reference to fig. 3.

The motor 10 is attached to the upper half 41b via the spacer 15, and is driven by electric power supplied from the battery 51. An unillustrated excitation mechanism housed inside the upper half body 41b is coupled to the output shaft of the motor 10. In a crankcase formed across the inside of the lower half body 41a from the upper half body 41b, the rotational drive of the output shaft of the motor 10 is converted into a reciprocating linear motion (up-down motion) by a piston rod (not shown), and the up-down motion after the conversion is transmitted to the leveling plate 42. Thereby, the leveling plate 42 vibrates in the vertical direction. The ground GND can be tamped by beating the ground surface GND by the vibration of the leveling plate 42.

The vibration preventing member 41c is provided between the upper half body 41b and the lower half body 41 a. The leveling plate 42 strikes the ground surface GND, and the reaction thereof moves the tamper device 40A up and down, but the vibration of the leveling plate 42 and the lower half body 41a is transmitted to the upper half body 41b in a reduced state due to the interposition of the vibration-proof member 41 c.

(mounting structure of electric component)

Fig. 3 is a diagram illustrating the mounting structure of the electric devices (battery 51, PDU 55). In fig. 3, the attachment plate 54 is a plate attached to the support portion 70, and electric components such as the battery 51 and the PDU can be attached to an upper surface 354A (first surface) and a lower surface 354B (second surface which is a back surface of the first surface) of the attachment plate 54.

A holding tray 53 that detachably holds the battery 51 is attached to the upper surface 354A of the attachment plate 54 by a fastening member 53f (e.g., a bolt). The battery 51 is detachably held by the holding tray 53, and is attached to the upper surface 354A of the attachment plate 54 via the holding tray 53. In the battery 51, the motor connecting portion 51a can be connected with a connector cable 55a electrically connected with the motor 10 via a PDU 55. The motor 10 and the PDU55 are electrically connected via the cable 55b, and the connector cable 55a and the motor connecting portion 51a are connected in a state where the battery 51 is attached to the holding tray 53, whereby the motor 10 and the battery 51 are electrically connected via the connector cable 55a, the PDU55, and the cable 55 b.

The exterior member 52 (decorative member) has an opening 352 at the center. The exterior member 52 is attached to the upper surface 354A of the attachment plate 54 by fastening members 52a (e.g., bolts), and in a state of being attached to the attachment plate 54, the exterior member 52 covers the outer periphery of the holding tray 53 and the lower portion of the battery 51.

PDU55 is disposed in protective PDU casing 56, and PDU casing 56 with PDU55 disposed therein is attached to lower surface 354B of mounting plate 54 by fastening member 56 a.

In the configuration in which an electric device (the battery 51 included in the electric device) is mounted on the upper surface 354A of the mounting plate 54, and another electric device (e.g., PDU55) included in the electric device) is mounted on the lower surface 354B, the space on the lower surface side of the mounting plate 54 can be effectively used as compared with the configuration in which the electric devices are stacked on one surface (e.g., the upper surface side), and therefore the device configuration can be made smaller. Further, since the battery 51 needs to be charged by a charger outside the apparatus for a predetermined time, the frequency of attaching and detaching the battery 51 is higher than PDU 55. The battery 51 with high frequency of attachment and detachment is detachably attached to the upper surface 354A side of the attachment plate 54 via the holding tray 53 having an attachment and detachment mechanism, thereby improving the work efficiency of the operator. In addition, when the remaining battery amount display unit is provided on the upper surface of the battery, the operator can easily observe and confirm the remaining battery amount during the operation, and thus the operator can easily grasp the charging time.

(attaching and detaching structure of battery 51)

Fig. 6 is a diagram illustrating a structure for attaching and detaching the battery 51. In fig. 6, the right side of the drawing corresponds to the left side of the device, and the left side of the drawing corresponds to the right side of the device. ST61 is a diagram showing a state where the battery 51 is placed on the holding tray 53. The operator can carry the battery 51 by gripping the battery grip 156 provided on the upper portion of the battery 51, and can place the battery 51 on the holding tray 53 along the arrow 50A. An engaging convex portion 53c is formed at the right end portion of the holding tray 53, and the engaging convex portion 53c is engaged with an engaging concave portion 51e formed at the right end portion of the battery 51, whereby the holding position of the battery 51 is defined on the holding tray 53.

ST62 is a diagram showing a state where the battery 51 is placed on the holding tray 53. When the battery 51 is placed on the holding tray 53 in a state where the holding position is defined by the engagement of the engaging convex portion 53c and the engaging concave portion 51e, the seat portions 51a and 51b provided on the lower surface of the battery 51 come into contact with the elastic bodies (for example, rubbers 53a and 53b) provided on the holding tray 53.

In the structure of the tamping device, a holding wire 57 for holding the battery 51 placed on the holding tray 53 is provided at the right end portion (left side of the paper surface) of the holding tray 53, and the left end portion (right side of the paper surface) of the holding wire 57 is rotatably supported by the wire support portion 53 d. A holding rod 58 is provided at the right end (left side of the paper) of the holding wire 57. The holding lever 58 is pivotable about a pivot point 58a, and when the holding lever 58 is pivoted about the pivot point 58a as indicated by an arrow 50B, a holding convex portion 58B formed at the distal end portion of the holding lever 58 engages with a holding concave portion 51d formed at the upper portion of the battery 51, and is held.

ST63 is a diagram showing a state where the battery 51 is held in the holding tray 53. The battery 51 is held on the holding tray 53 on the right side of the drawing (left side of the device) by the engagement of the engaging convex portion 53c with the engaging concave portion 51e, and is held on the holding tray 53 on the left side of the drawing (right side of the device) by the engagement of the holding convex portion 58b with the holding concave portion 51 d.

This is a flow until the battery 51 is placed on and held by the holding tray 53. When the battery 51 is detached from the holding tray 53, the battery 51 can be detached from the holding tray 53 by performing the procedure reverse to the flow from ST61 to ST 63.

(Structure of support part 70)

Fig. 2 is a diagram showing the structure of the support portion. The electric device (the battery 51, PDU55 disposed in the PDU case 56) is attached to the support portion 70 via the attachment plate 54. In the example shown in fig. 2, the support portion 70 is formed as a substantially コ -shaped frame body by the left frame 70a, the right frame 70b, and the center frame 70c, and the attachment plate 54 is attached between the left frame 70a and the right frame 70b by a fastening member 54a (e.g., a bolt). The left and right frames 70a, 70b have connecting portions 71a, 71b at their ends for connecting the support portion 70 and the vibration preventing member 73. The connecting portion 71b is formed with a through hole 71c that penetrates the rotation support member 77a (e.g., a bolt).

In fig. 2, ST21 denotes a sectional view of the anti-vibration member 73 in the direction along the rotation shaft 80. The vibration preventing member 73 has: a vibration-proof member body 73a having a hollow cylindrical shape; an elastic member 72 inserted into the vibration damping member body 73 a; and a bushing 76 inserted into an opening 72a formed in the center of the elastic member 72. The inner diameter 76a of the sleeve 76 is formed to be able to penetrate the rotation support member 77 a.

The rotational support member 77a of the bushing 76, which has passed through the through hole 71c and the vibration preventing member 73, is engaged with a rotational engagement member 77b (e.g., a nut), and thereby the vibration preventing member 73 is attached to the connecting portion 71b of the right frame 70 b.

In the configuration of fig. 2, although a configuration example is shown in which the vibration preventing member 73 is attached to the connecting portion 71b of the right frame 70b, the same applies to the left frame 70a, and the vibration preventing member 73 is attached to the connecting portion 71a of the left frame 70a by engaging the rotary engaging member 77b with the rotary supporting member 77a that penetrates the through hole 71c formed in the connecting portion 71a of the left frame 70a and the sleeve 76 of the vibration preventing member 73.

The upper vibration damping mounting member 74 has a semicircular cylindrical arc portion 74a and flange portions 74b formed at both ends of the arc portion 74 a. The flange portion 74b is formed with a through hole 78c through which a fastening member 78a (e.g., a bolt) can be inserted.

The lower vibration isolation mounting member 75 has a semicircular arc portion 75a, first flange portions 75b formed at both ends of the arc portion 75a, a stepped portion 75d formed in the vertical direction from the end of the first flange portion 75b, and a second flange portion 75c formed at the end of the stepped portion 75 d. An engagement portion 78b (e.g., a screw hole) that engages with the fastening member 78a is formed in the first flange portion 75 b. The second flange portion 75c is formed with a through hole 79b through which a fastening member 79a (e.g., a bolt) can pass.

The upper vibration isolation mounting member 74 and the lower vibration isolation mounting member 75 are mounted to the support portion 70 by engaging the fastening member 78a with the engaging portion 78b in a state where the vibration isolation member 73 is sandwiched from the vertical direction. In the engaged state by the fastening member 78a, the arc portion 74a and the arc portion 75a hold the outer periphery of the vibration damping member body 73a from the vertical direction, rotatably hold the support portion 70, and hold the position of the support portion 70 in the rotated state.

In a state where the second flange portion 75c is in contact with the member on the upper half body 41b side, the fastening member 79a is engaged with an engagement portion (for example, a screw hole) of the member on the upper half body 41b side, whereby the support portion 70 can be attached to the upper half body 41b via the vibration isolation member 73. In fig. 2, an example is shown in which the second flange portion 75c is brought into contact with the handle holding member 44 holding the handle 45 and fastened by the fastening member 79a, but this is not limitative, and a frame may be extended upward from the spacer 15 and the support portion 70 may be provided on the frame via the vibration-proof member 73. The shape of the second flange portion 75c is not limited to a flat shape, and may be formed to match the shape of the member (handle holding member 44) on the upper half body 41b side that is in contact therewith. For example, if the handle holding member 44 is a member having a cylindrical outer shape, the second flange portion 75c may be formed in an arc shape having a curvature conforming to the cylindrical outer shape. Further, if the handle holding member 44 is a member having a planar outer shape, the second flange portion 75c can be formed flat.

(mounting structure of handle 45 and support 70)

The handle 45 is rotatably attached to the upper half body 41b by a handle holding member 44 having the same structure as the vibration preventing member 73, and is configured to be rotatable in the vertical direction about a rotation shaft 90 of the handle holding member 44 (fig. 1). The support portion 70 is attached to the handle holding member 44 by engagement of a fastening member 79a penetrating a through hole 79b of the second flange portion 75c (fig. 2) with the handle holding member 44, and is configured to be rotatable in the vertical direction about the rotation shaft 80 of the vibration preventing member 73.

The vibration transmitted from the leveling plate 42 acts on the center of the vibration-proof member 73 (the rotation shaft 80) as an exciting force F on the vibration-proof member 73. The support portion 70 has a cantilever structure supported by the vibration preventing member 73, and the cantilever-structured support portion 70 is excited by the exciting force F.

In fig. 1, the center of gravity G indicates the overall center of gravity of the support portion 70, the electric components (the battery 51, the PDU55), the exterior member 52, the holding tray 53, the attachment plate 54, and the PDU casing 56 (hereinafter, the overall structure thereof is also referred to as "support unit"). La denotes a distance (length) from the center of the vibration preventing member 73 (the rotation axis 80) to the center of gravity G of the support unit. In fig. 1, point C indicates a position (a center position in the front-rear direction of the electric device) where the electric device (the battery 51, PDU55) is attached to the attachment plate 54, and Lb indicates a distance (length) from the center of gravity G to the position C.

Assuming that the moment of inertia about the center of gravity G of the support unit is IG and the mass of the support unit is M, the position C that is not affected by the vibration in the vertical direction due to the excitation force F can be obtained as Lb as IG/(M · La) in accordance with the theory of the center of percussion. By mounting the electric component at the position C defined by Lb, the influence of vibration in the vertical direction (translational direction) can be reduced.

Further, by setting the elastic coefficient (spring constant) of the elastic member 72 of the vibration preventing member 73 to be sufficiently smaller than the vibration frequency of the impact ramming device 40A, the influence of resonance can be reduced.

An elastic member is also provided inside the handle holding member 44, similarly to the vibration preventing member 73 (ST 21 in fig. 2). The elastic members in the vibration preventing member 73 of the support portion 70 and the handle holding member 44 of the handle 45 can use members having different elastic coefficients according to the vibration characteristics of the support portion 70 and the vibration characteristics of the handle 45. The vibration-proof member 73 of the support portion 70 and the vibration-proof member of the handle 45 (the handle holding member 44 including the vibration-proof member) are provided so as to be interposed between the upper half body 41b and the support portion 70 independently. This can suppress vibration of the handle 45 and the electric components attached to the support portion 70. According to the device structure of the present embodiment, the vibration of the electric device can be reduced independently of the handle.

In the apparatus configuration shown in fig. 1, the support portion 70 is provided below the handle 45 in a side view, and the handle 45 is configured to cover at least a part of the electric components (for example, the battery 51 and the PDU55 disposed in the PDU case 56) attached to the support portion 70. This makes it possible to reduce the size of the device structure, and to protect the electric components with the handle 45 when the device is turned over, for example, when the battering device 40A is not in use. The reinforcing member 63 is attached between the handle right frame 48 and the handle left frame 49 that constitute the handle 45, and the reinforcing member 63 protects the battery 51. The reinforcing member 64 couples the handle 45 and the movable plate 43 of the upper half 41b, and covers at least a part of the electric components (for example, the battery 51 and the PDU55 disposed in the PDU case 56) and at least a part of the motor 10 attached to the support portion 70. This makes it possible to protect the electric device and the motor 10 with the reinforcing member 64 when the device is tipped over.

Fig. 4 is a view of the battering ram device 40A from above. The handle 45 has a front frame 47, a rear frame 46, a right handle frame 48, and a left handle frame 49, and is formed as a substantially rectangular frame body. The support portion 70 is formed of a left frame 70a, a right frame 70b, and a center frame 70c as a substantially コ -shaped frame, and the support portion 70 is disposed inside the frame of the handle 45. When the operator performs the leveling work, an operation of mainly gripping the front frame 47 (handle portion) of the handle 45 of the tamper device 40A and rotating and pressing the handle 45 downward in the vertical direction is required, but by providing the support portion 70 inside the housing of the handle 45, the device configuration can be made compact, and interference with the support portion 70 can be prevented when the handle 45 is rotated. Further, since the handle holding member 44 is provided separately from the vibration preventing member 73 and the electric component is provided on the support portion 70 (no electric component is provided on the handle 45), the electric component does not rotate in conjunction with the rotation of the handle, and therefore, the electric component can be prevented from interfering with other members (such as a motor) of the apparatus.

[ modified example of the first embodiment ]

(coaxial structure of vibration-proof member)

In the example shown in fig. 1 and 4, the structure in which the vibration preventing member 73 of the support portion 70 and the handle holding member 44 of the handle 45 are provided separately has been described as the structure of the vibration preventing member, but the vibration preventing member 73 and the handle holding member 44 may be provided coaxially and formed as an integral vibration preventing member. In this case, the rotation shaft 80 of the vibration preventing member 73 in the support portion 70 may be arranged coaxially with the rotation shaft 90 of the handle holding member 44, and the vibration preventing member 73 may be provided in the handle holding member 44. This makes it possible to reduce the size and weight of the device, and prevent interference with the support portion 70 when the handle 45 is rotated.

(height of support portion 70 with respect to handle 45)

In the example of fig. 1, the example in which the support portion 70 is disposed below the handle 45 is shown as the device configuration, but in addition to this example, the device configuration may be such that the support portion 70 is disposed above the handle 45. In this case, the height of the step portion 75d in the lower vibration isolation mounting member 75 shown in fig. 2 in the vertical direction may be set to a length at which the support portion 70 is disposed above the handle 45, or the upper end portion (upper half body 41b) of the device may be formed to protrude above the handle 45, and the support portion 70 may be provided at the portion formed by the protrusion via the vibration isolation member 73.

(weight adjustment part of support part 70)

As the configuration of the support portion 70, a weight adjustment portion may be provided on the support portion 70 on the side opposite to the position where the electric device (the battery 51, PDU55) is attached via the vibration-proof member 73 of the support portion 70. For example, in fig. 4, as shown by the one-dot chain line, extension frames 70d and 70e may be formed to extend the left frame 70a and the right frame 70b constituting the support portion 70 toward the rear side of the apparatus, and weights W may be provided as weight adjustment portions to the extension frames 70d and 70 e.

The weight W can be adjusted by increasing or decreasing the weight, and the moment (clockwise direction) around the center of gravity G of the electric component can be reduced by the moment (counterclockwise direction) around the center of gravity G of the weight adjusting portion (weight W). By reducing the moment of the electric component around the center of gravity G, the position C where the electric component is mounted can be moved toward the center of gravity G, and the protruding length L1 (fig. 1) of the support portion 70 protruding forward from the electric component can be shortened. By shortening the projecting length L1 of the support portion 70, the gap L2 between the center frame 70c of the support portion 70 and the front frame 47 of the handle 45 can be enlarged. This makes it possible to further prevent interference with the support portion 70 when the handle 45 is rotated, while making the device compact.

(construction in which the support portion 70 is formed of a plate material)

In fig. 2, a configuration example of a plurality of frames (a left frame 70a, a right frame 70b, and a center frame 70c) is shown as the support portion 70, but in addition to this example, the support portion 70 may be formed of a plate-shaped member (plate material). In this case, the plate-shaped member may be provided with an opening for avoiding interference with the PDU casing 56 attached to the lower surface 354B of the attachment plate 54.

(modification 1 (FIG. 7) of mounting plate 54.)

Fig. 7 is a view showing modification 1 of the mounting plate 54, and is a view of the tamper device 40A (fig. 1) as viewed from above. The mounting structure of the electric devices (battery 51, PDU55) to the mounting plate 54 is the same as in fig. 3 and 4, and the structure of connecting the end portions of the left and right frames 70a, 70b of the support portion 70 to the vibration preventing member 73 is the same as in fig. 2. The weight adjusting portion (weight W) of the support portion 70 is also configured in the same manner as in fig. 4.

As shown in fig. 7, the attachment plate 54 has a rectangular shape in plan view, and is attached by fastening members 54a (e.g., bolts) so as to cover the upper surface of the support portion 70. Here, the support portion 70 is formed as a substantially コ -shaped frame body by the left frame 70a, the right frame 70b, and the center frame 70c, and a portion indicated by a broken line in the structure of the support portion 70 is provided on the lower surface of the attachment plate 54.

In a state where the attachment plate 54 is attached to the support portion 70, the left end portion 254a of the attachment plate 54 protrudes outward of the frame body from the left frame 70a of the support portion 70 (protruding length Ls). Similarly, the right end 254b of the attachment plate 54 also extends outward from the right frame 70b of the support 70 (extension Ls) toward the housing. Further, the front end portion 254c of the attachment plate 54 projects outward from the center frame 70c toward the housing (projecting length Lf). The extension length Lf of the tip end 254c may be equal to the extension length Ls of the left and right ends 254a and 254b (Lf equals Ls). In order to facilitate the operator to grip the front frame 47 of the handle 45, the extension length Lf of the front end 254c may be shorter than the extension lengths Ls of the left and right ends 254a and 254b (Lf < Ls).

According to the structure of modification 1 of the attachment plate 54 shown in fig. 7, since the region where the attachment plate 54 abuts against the support portion 70 (the region of the support portion 70 shown by the broken line in fig. 7) can be increased, the number of fastening members 54a to the left frame 70a, the right frame 70b, and the center frame 70c of the support portion 70 can be increased.

For example, in the example shown in fig. 4, the mounting plate 54 is attached to the left frame 70a by two fastening members 54a, and is attached to the right frame 70b by two fastening members 54 a. In contrast, in the example shown in fig. 7, the mounting plate 54 is attached to the left frame 70a by three fastening members 54a, attached to the right frame 70b by three fastening members 54a, and further attached to the center frame 70c by two fastening members 54 a. This allows the mounting plate 54 to be stably arranged on the upper surface of the support portion 70, and the outer edge of the mounting plate 54 to be more firmly attached to the support portion 70.

(modification 2 (FIG. 8) of mounting plate 54.)

Fig. 8 is a diagram showing a modification 2 of the mounting plate 54, and is a diagram of the tamper device 40A (fig. 1) as viewed from above. As shown in fig. 8, the mounting plate 54 has a rectangular shape in plan view, and is mounted by fastening members 54a (e.g., bolts) so as to cover the upper surface of the support portion 70, in the same manner as in modification 1 of fig. 7. The portion indicated by a broken line in the structure of the support portion 70 is provided on the lower surface of the mounting plate 54. The weight adjusting portion (weight W) of the support portion 70 has the same configuration as that of fig. 4 and 7. However, in modification 2, since the apparatus width WD2 is narrower than the apparatus width WD1 of modification 1 (WD2 < WD1), the length LP2 in the left-right direction of the attachment plate 54 in fig. 8 is shorter than the length LP1 in the left-right direction of the attachment plate 54 in fig. 7 (LP2 < LP 1).

The structure of the support portion 70 in which the end portion of the left frame 70a and the end portion of the right frame 70b are connected to the anti-vibration member 73 is the same as that shown in fig. 2, but in modification 2 of fig. 8, the direction in which the electric device (battery 51) is attached to the attachment plate 54 is different from the attachment direction shown in fig. 4 and 7. For example, while the longitudinal direction of the battery 51 is arranged along the left-right direction of the tamper device 40A in fig. 7, the longitudinal direction of the battery 51 is arranged along the front-rear direction of the tamper device 40A in modification 2 of fig. 8.

According to the configuration of modification 2 of the attachment plate 54 shown in fig. 8, the attachment plate 54 can be arranged on the upper surface of the support portion 70 in a stable state as in modification 1, and the outer edge of the attachment plate 54 can be more firmly attached to the support portion 70. Further, according to the configuration of modification 2, the device width (WD2) (WD2 < WD1) of the tamper device 40A of modification 2 can be reduced as compared with the device width (WD1) of the tamper device 40A of modification 1, and a more compact tamper device 40A can be provided.

(modification 3 (FIG. 9) of mounting plate 54)

Fig. 9 is a diagram showing modification 3 of the mounting plate 54, and is a diagram of the tamper device 40A (fig. 1) as viewed from above. As shown in fig. 9, the attachment plate 54 has a rectangular shape in plan view, and is attached by fastening members 54a (e.g., bolts) so as to cover the upper surface of the support portion 70. The portion indicated by a broken line in the structure of the support portion 70 is provided on the lower surface of the mounting plate 54. In modification 3 of fig. 9, the structure of the support portion 70 is different from the structures of modifications 1 and 2 of the first embodiment of fig. 4, fig. 7, and fig. 8.

In fig. 4, 7, and 8, the support portion 70 is formed as a substantially コ -shaped frame body by the left frame 70a, the right frame 70b, and the center frame 70c, but in modification 3 of fig. 9, the support portion 70 is formed as a substantially T-shaped frame body by the front-rear direction frame 170a and the left-right direction frame 170b, which is different in this point. In modification 3 of fig. 9, member width WD4 of front-rear direction frame 170a and left-right direction frame 170b is formed wider than member width WD3 of the frames (left frame 70a, right frame 70b, and center frame 70c) shown in fig. 7 and 8 (WD4 > WD3), for example, in comparison with modifications 1 and 2 of fig. 4, 7, and 8, in order not to reduce the rigidity of support portion 70.

In modification 3 of fig. 9, the member width WD4 is formed to be wider than the member width WD3, but the present invention is not limited to this example, and for example, the member thicknesses of the front-rear direction frame 170a and the left-right direction frame 170b may be formed to be thicker than the member thicknesses of the frames (the left frame 70a, the right frame 70b, and the center frame 70c) shown in fig. 7 and 8 in the direction perpendicular to the paper surface. By forming at least one of the member width and the member thickness so that the cross-sectional characteristic (cross-sectional second moment) of the support portion 70 becomes a predetermined value, the same rigidity as that of the support portion 70 shown in fig. 4, 7, and 8 can be achieved.

In the first embodiment of fig. 4, fig. 7, and modifications 1 and 2 of fig. 8, the end portions of the left frame 70a and the right frame 70b of the support portion 70 are connected to the left and right anti-vibration members 73, respectively (fig. 2), but in modification 3 of fig. 9, the end portion of the front-rear direction frame 170a is connected to a single anti-vibration member 73. According to the structure of modification 3 of the attachment plate 54 shown in fig. 9, the number of components (for example, the elastic member 72, the upper vibration isolating attachment member 74, the lower vibration isolating attachment member 75, the sleeve 76, and the like shown in fig. 2) for connecting to the vibration isolating member 73 can be reduced, and the structure of the vibration isolating member 73 can be simplified.

In the first embodiment of fig. 4, the modification examples 1 and 2 of fig. 7 and 8, the right and left weights W are used as the weight adjustment portions. In modification 3 of fig. 9, by providing two weights 2W as one weight, the same weight adjustment effect as in modifications 1 and 2 of the first embodiment of fig. 4, fig. 7, and fig. 8 can be achieved.

Further, although the PDU casing 56 is attached to the lower surface 354B (fig. 3) of the attachment plate 54 in fig. 4, 7, and 8, in modification 3 of fig. 9, the PDU casing 56 can be attached to the lower surface 354B (fig. 3) of the attachment plate 54 without interfering with the front-rear direction frame 170a by forming the notches 56B and 56c (fig. 10) in the PDU casing 56 that can intersect the front-rear direction frame 170 a. Thus, also in modification 3, as in the first embodiment of fig. 4, and modifications 1 and 2 of fig. 7 and 8, the space on the lower surface side of the attachment plate 54 can be effectively used, and therefore the device configuration can be made smaller.

In modification 3 of fig. 9, an example is shown in which the battery 51 is disposed in the longitudinal direction along the left-right direction of the tamper device 40A, as in the first embodiment of fig. 4 and modification 1 of fig. 7. The arrangement direction of the battery 51 is not limited to this example, and the tamper device 40A may be configured such that the longitudinal direction of the battery 51 is arranged along the front-rear direction of the tamper device 40A, as in modification 2 of fig. 8, for example. Thus, as in modification 2, the device width of the tamper device 40A of modification 3 can be reduced, and a more compact tamper device 40A can be provided.

[ second embodiment ]

(structural example of tamping apparatus: plate compactor)

In the first embodiment, the example of the structure of the impact ramming device 40A has been described as an example of the structure of the ramming device, but in addition to this example, the mounting structure of the support portion 70 and the electric components (the battery 51, PDU55) may be applied to the plate compactor. Fig. 5 is a diagram showing a configuration of a plate compactor 40B as a configuration example of the earth-compacting device according to the second embodiment.

The plate compactor 40B includes: a motor 150 functioning as a drive source; upper half bodies 144 and 154 on the upper side of the vibration isolating member 146; a vibration preventing member 146; a lower half body 145 located below the vibration preventing member 146; an excitation mechanism 158; and a leveling plate 142. The handle 147 is configured as a substantially rectangular frame in the same manner as the handle 45 described in the first embodiment. A handle 147 is attached to the upper half 144. The flat plate 142 is coupled to the lower half 145, and the lower half 145 and the flat plate 142 vibrate by the vibration of the exciting mechanism 158.

In fig. 5, a motor 150 is provided in an upper half 154 via a spacer 151, and a drive pulley 152 is attached to an output shaft 150a of the motor 150. A driven pulley 153 is attached to the rotating shaft 153a of the exciting mechanism 158, and a power transmission mechanism 155 (drive belt) is provided between the drive pulley 152 and the driven pulley 153. The rotational driving force of the motor 150 is transmitted to the exciting mechanism 158 via the driving pulley 152, the power transmission mechanism 155, and the driven pulley 153, and the lower half 145 and the flat plate 142 are vibrated by the vibration of the exciting mechanism 158 based on the transmitted rotational driving force.

The reaction to the vibration of the leveling plate 142 causes the plate compactor 40B to move up and down, but the vibration of the leveling plate 142 and the lower half 145 is reduced by the intermediary of the vibration-proof member 146, and transmitted to the upper half 144, 154 and the handle 147 attached to the upper half 144. The vibration isolating member 146 functions as a vibration isolating member for the upper half bodies 144 and 154 and the handle 147 attached to the upper half body 144, and is configured differently from the vibration isolating member 73 of the support portion 70 described later.

In the plate compactor device 40B, the support portion 70 is attached to the upper half body 154 via the vibration preventing member 73 separately from the vibration preventing member 146 of the handle 147, and an electric device for driving the motor 150 is attached to the support portion 70. Here, the upper vibration isolating mounting member 74, the lower vibration isolating mounting member 75, and the elastic member 72 for mounting the vibration isolating member 73 to the upper half body 154 have the same configurations as those of the first embodiment. Further, an extension frame 70e that extends the support portion 70 to the rear side of the apparatus is formed as a structure of the weight adjustment portion, and a structure in which the weight W is provided on the extension frame 70e as the weight adjustment portion is also the same as that of the first embodiment.

The structure for mounting the electric components on the support portion 70 is also the same as the structure described with reference to fig. 2 and 3. In a configuration in which an electric device (the battery 51 included in the electric device) is mounted on the upper surface 354A of the mounting plate 54, and another electric device (another electric device included in the electric device (for example, PDU55)) is mounted on the lower surface 354B, the space on the lower surface side of the mounting plate 54 can be effectively used as compared with a configuration in which an electric device is laminated on one surface, and therefore the device configuration can be made smaller.

Further, the battery 51 having a high frequency of attachment and detachment is detachably attached to the upper surface 354A side of the attachment plate 54 via the holding tray 53 having an attachment and detachment mechanism, so that the work efficiency of the operator can be improved. In addition, when the remaining battery amount display unit is provided on the upper surface of the battery, the operator can easily observe and confirm the remaining battery amount during the operation, and thus the operator can easily grasp the charging time.

The relative positional relationship between the handle 147 and the support portion 70 described in the first embodiment can be applied to the handle 147 and the support portion 70 in the second embodiment. According to the present embodiment, it is possible to provide a tamping device capable of reducing vibration of an electric device independently of a handle. Further, modifications 1 to 3 of the attachment plate 54 described in fig. 7 to 10 can be applied to the attachment plate 54 (fig. 5) of the second embodiment.

[ summary of the embodiments ]

The structure 1, the ramming device of the above embodiment is a ramming device (e.g., 40A of FIG. 1, 40B of FIG. 5) having a leveling plate (e.g., 42 of FIG. 1, 142 of FIG. 5) and a motor (e.g., 10 of FIG. 1, 150 of FIG. 5) that drives the leveling plate (42, 142),

the upper half body (e.g., 41b in FIG. 1, 144 in FIG. 5, and 154) of the tamping device is provided with a support portion (e.g., 70 in FIG. 1 and 5) which is attached to the upper half body of the tamping device via a vibration-proof member (e.g., 73 in FIG. 1 and 5) independently of the handle (e.g., 45 in FIG. 1 and 147 in FIG. 5),

an electric device (e.g., 51 in fig. 1 and 5, PDU55) for driving the motors (10, 150) is attached to the support portion (70).

According to the tamping device of the structure 1, a tamping device capable of reducing vibration of the electric device independently of the handle can be provided.

In the ramming device according to the embodiment of the present invention, the vibration preventing member (73) is provided between the upper half body (41b, 144, 154) and the support portion (70) independently of the vibration preventing member (e.g., 44 in fig. 1 and 5) of the handle (45, 147).

According to the ramming device of configuration 2, since the vibration preventing member of the support portion is independent from the vibration preventing member of the handle, it is easy to suppress the vibrations individually. Further, when the handle is rotated, the electric component does not rotate in conjunction with the handle, and therefore, interference with other members (such as a motor) can be suppressed.

Structure 3, in the ramming device according to the above embodiment, the support portion (70) has a rotation axis (e.g., 80 in fig. 1) in the coaxial direction with the handle.

According to the tamping device of structure 3, the device structure can be made small and lightweight, and interference with the support portion can be prevented when the handle is rotated.

Structure 4, in the ramming ground device according to the above-described embodiment, the handle (45) is configured as a frame when the ramming ground device is viewed in a plan view,

the support part (70) is disposed inside the frame of the handle.

According to the tamping device of structure 4, the device can be made compact, and interference with the support portion can be prevented when the handle is rotated.

The structure 5 further includes a weight adjusting portion (for example, W in fig. 1, 4, and 5) on the opposite side of the position where the electric device is attached via the vibration preventing member (73) of the support portion (70) in the ramming device according to the embodiment.

According to the tamping device of the structure 5, the protruding length of the support portion protruding forward from the electric component can be shortened. By shortening the protruding length of the support portion, the gap between the support portion and the handle can be enlarged. This makes it possible to further prevent interference with the support portion when the handle is rotated while making the device compact.

In the structure 6 and the ramming device according to the above embodiment, when the ramming device is viewed in a side view, the support portion (70) is provided below the handle (45), and the handle (45) covers at least a part of the electric component (e.g., 51).

According to the ramming device of the configuration 6, the device configuration can be miniaturized, and the electric equipment can be protected by the handle when the device is turned over or the like in an unused state.

The structure 7, in the ramming ground device according to the above embodiment, the support portion (70) has at least a plate (e.g., 54),

the battery (e.g., 51 of fig. 3 and 5) included in the electric device is mounted on the upper surface (e.g., 354A of fig. 2) of the board,

another electric device (e.g., PDU55 of fig. 3 and 5) included in the electric device is mounted on a lower surface (e.g., 354B of fig. 2) of the board, which is a rear surface of the upper surface (354A).

According to the ramming device of configuration 7, the space on the lower surface side of the plate can be effectively utilized as compared with the configuration in which the electric components (the battery 51 and the PDU55) are laminated on one surface (for example, the upper surface side), and therefore the device configuration can be miniaturized.

Further, since the battery needs to be charged by a charger outside the device for a predetermined time, the frequency of attaching and detaching the battery is higher than that of other electrical components (PDU 55). By detachably attaching the battery, which is highly frequently attached and detached, to the upper surface side of the attachment plate via the holding tray, it is possible to improve the work efficiency of the operator. In addition, when the remaining battery amount display unit is provided on the upper surface of the battery, the operator can easily observe and confirm the remaining battery amount during the operation, and thus the operator can easily grasp the charging time.

The structure 8 is such that, in the ramming ground device according to the above-described embodiment, the ramming ground device further includes a reinforcing member (e.g., 64 in FIG. 1) that connects the handle (45) and the upper half body (41b),

the reinforcing member (64) covers at least a part of the electric device attached to the support portion (70).

According to the ramming device of the structure 8, the electric equipment can be protected by the reinforcing member when the ramming device is overturned or the like.

Structure 9, in the ramming device according to the above embodiment, the reinforcing member (64) covers at least a part of the motor (10).

According to the ramming device of the structure 9, the motor can be protected by the reinforcing member when the device is turned over or the like.

The present invention is not limited to the above-described embodiments, and various changes and modifications can be made without departing from the spirit and scope of the present invention. Accordingly, to disclose the scope of the invention, the following claims are added.

This application claims priority based on international application number PCT/JP2019/015211 filed on 5.4.2019, the entire contents of which are incorporated herein by reference.

Description of the reference numerals

10: a motor; 15: a spacer; 40A: a tamping device (battering device); 40B: a tamping device (plate compactor); 41 a: lower half bodies 41a, 41 b: an upper half body; 41 c: a vibration-proof member; 42: leveling the plate; 45: a handle; 51: a battery; 52: an exterior member; 53: a holding tray; 54: mounting a plate; 55: a PDU; 56: a PDU housing; 70: a support portion; 73: a vibration-proof member; 144. 154: an upper half body; 145: a lower half body; 146: a vibration-proof member; 147: a handle; 150: a motor; 152: a drive pulley; 153: a driven pulley; an excitation mechanism 158.