JP7089909B2 - Lifting table vibration reduction mechanism and work trolley - Google Patents

Description

The present invention relates to a vibration reducing mechanism for an elevating table and a work cart.

Conventionally, an elevating table such as a scissors lift (registered trademark) equipped with an elevating mechanism such as scissors and a pantograph mechanism used when working at a high place, and a workbench using the elevating table as a workbench are known. In such a workbench, if the ascending / descending distance (stroke) is long, the workbench often continues to sway laterally at the raised position. Working on a swaying workbench is not preferable in terms of workability and safety. In addition, it is difficult to perform work with high construction accuracy on a swaying workbench. For this reason, a mechanism capable of rapidly reducing lateral shaking has been required.

As a conventional technique for solving such a problem, for example, an anti-sway structure of an aerial work platform as shown in Patent Document 1 is known. In this structure, in an aerial work platform equipped with a plurality of elevating devices including at least one plane link mechanism that expands and contracts in one plane vertically from the chassis, adjacent elevating devices are arranged orthogonally on the chassis to elevate and elevate these. It is equipped with a connecting means for connecting an elevator supported by the device and a workbench. By suppressing the lateral sway that occurs in one elevating device by the lateral rigidity of the other elevating device, the lateral sway of each elevating device is reduced.

Japanese Unexamined Patent Publication No. 2002-326794

However, in the conventional anti-sway structure of Patent Document 1, at least two elevating devices need to be arranged adjacent to each other at positions orthogonal to each other, which may complicate the structure and increase the cost.

Therefore, there has been a demand for the development of a simple mechanism capable of rapidly reducing the lateral shaking of the workbench (elevating table) at a high place.

The present invention has been made in view of the above, and an object of the present invention is to provide a simple lifting table vibration reducing mechanism and a work cart capable of rapidly reducing lateral vibration of a table at a high place. And.

In order to solve the above-mentioned problems and achieve the object, the vibration reducing mechanism of the elevating table according to the present invention is between the table body arranged so as to be able to move up and down above the support, and between the support and the table body. It is a vibration reduction mechanism for reducing vibration generated in an elevating table provided with an elevating mechanism that is arranged and elevates the table body between a support and a high place. It is provided in the elevating mechanism and raises the table body. It is characterized by being provided with an elevating mechanism in a raised state and a vibration reducing device for reducing vibration generated in the table body.

Further, the vibration reduction mechanism of the other elevating table according to the present invention is, in the above-mentioned invention, the elevating mechanism is a scissors link mechanism composed of at least a pair of X-shaped links arranged facing each other in the left-right direction, and vibrates. The reduction device is characterized in that it is erected in a brace shape in a structure formed between the left and right X-shaped links.

Further, the vibration reducing mechanism of the other elevating table according to the present invention is, in the above-mentioned invention, the elevating mechanism is a scissors link mechanism composed of at least a pair of X-shaped links arranged facing each other in the left-right direction, and vibrates. The reduction device is characterized in that it is extensiblely installed between the upper end portion and the lower end portion of the scissor link mechanism as the elevating mechanism moves up and down.

Further, the vibration reduction mechanism of the other elevating table according to the present invention is, in the above-mentioned invention, the elevating mechanism is a scissors link mechanism composed of at least a pair of X-shaped links arranged facing each other in the left-right direction, and vibrates. The reduction device is characterized in that it is erected in a brace shape in the front and rear planes orthogonal to the left and right structural planes formed by the X-shaped links.

Further, the workbench according to the present invention is installed between a bogie main body having wheels at the lower part, a workbench consisting of an elevating table arranged above the bogie main body, and the bogie main body and the workbench, and is a workbench. It is characterized by being provided with an elevating mechanism for raising and lowering between the bogie main body and a high place, and a vibration reducing mechanism for the elevating table described above.

According to the vibration reduction mechanism of the elevating table according to the present invention, the table body is arranged above the support so as to be able to move up and down, and the table body is arranged between the support and the table body. It is a vibration reduction mechanism for reducing the vibration generated in the elevating table provided with the elevating mechanism for raising and lowering between the two. Since it is equipped with a vibration reducing device for reducing the vibration, it has an effect that the shaking generated in the table body at the raised position can be rapidly reduced.

Further, according to the vibration reducing mechanism of another elevating table according to the present invention, the elevating mechanism is a scissors link mechanism composed of at least a pair of X-shaped links arranged facing each other in the left-right direction, and the vibration reducing device is a vibration reducing device. Since it is erected in a brace shape in the structure formed between the left and right X-shaped links, it has the effect of improving the fit of the vibration reducing device in the elevating mechanism.

Further, according to the vibration reducing mechanism of another elevating table according to the present invention, the elevating mechanism is a scissors link mechanism composed of at least a pair of X-shaped links arranged facing each other in the left-right direction, and the vibration reducing device is a vibration reducing device. Since it is installed between the upper end and the lower end of the scissor link mechanism so that it can be expanded and contracted as the elevating mechanism moves up and down, it is possible to effectively reduce the vibration in the front, back, left, and right directions that occurs in the table body. It works.

Further, according to the vibration reducing mechanism of another elevating table according to the present invention, the elevating mechanism is a scissors link mechanism composed of at least a pair of X-shaped links arranged facing each other in the left-right direction, and the vibration reducing device is a vibration reducing device. Since the table is erected in a brace shape in the front and rear planes orthogonal to the left and right structural planes formed by the X-shaped links, it is possible to effectively reduce the shaking generated in the table body.

Further, according to the workbench according to the present invention, a workbench consisting of a bogie body having wheels at the lower part, a workbench consisting of an elevating table arranged above the bogie body, and a workbench installed between the bogie body and the workbench. Since it is equipped with an elevating mechanism that raises and lowers the workbench between the bogie body and a high place and the vibration reduction mechanism of the elevating table described above, there is an effect that the shaking that occurs in the workbench at the raised position can be rapidly reduced. Play.

FIG. 1 is a schematic perspective view showing the vibration reduction mechanism of the elevating table and the embodiment 1 of the work cart according to the present invention. FIG. 2 is a schematic perspective view showing the vibration reduction mechanism of the elevating table and the second embodiment of the work cart according to the present invention. FIG. 3 is a schematic perspective view showing the vibration reduction mechanism of the elevating table and the embodiment 3 of the work cart according to the present invention. FIG. 4 is a schematic diagram of a main part of FIG.

The vibration reduction mechanism and the workbench of the elevating table according to the present invention are designed to rapidly reduce lateral sway even when the elevating table (workbench) is in a high place. Hereinafter, embodiments 1 to 3 of the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

(Embodiment 1)
First, Embodiment 1 of the present invention will be described. In the first embodiment, the vibration reducing device is erected in a brace shape in a structure formed between the left and right X-shaped links.

As shown in FIG. 1, the workbench 100 according to the first embodiment includes a bogie main body 10, a support 12, an elevating mechanism 14, a workbench 16 (table main body), and a vibration reduction mechanism 18 of the present invention. And prepare. An elevating table is composed of a support 12, a workbench 16, and an elevating mechanism 14. The work trolley 100 of the present embodiment is used, for example, at a construction site of a building, and is used for mounting materials and equipment.

The bogie body 10 is a rectangular parallelepiped having four wheels 20 at the bottom. Assuming that the X direction in the figure is the front-rear direction and the Y direction orthogonal to this is the left-right direction, the wheels 20 are provided at two places on the front left and right and two places on the rear left and right below the lower part of the trolley body 10. The bogie body 10 is provided with a braking device capable of stopping the position at a predetermined work place. The bogie body 10 may be an autonomous traveling type, or may be a system in which a worker rides on a driver's seat (not shown) and drives and travels.

The support 12 is for supporting the elevating mechanism 14, and is installed on the upper surface of the bogie main body 10. In the example shown in the figure, the support 12 has a square plate shape. Guides (not shown) extending in the front-rear direction are provided on the left and right sides of the upper surface of the support 12.

The workbench 16 is a platform on which a worker who works at a high place or the like can board or load an article, and is arranged above the support 12 so as to be able to move up and down. In the example of the figure, the workbench 16 is drawn as a simple square plate base, but a handrail, a fence, or the like may be provided around the workbench 16. Guides (not shown) extending in the front-rear direction are provided on the left and right sides of the lower surface of the workbench 16.

The elevating mechanism 14 includes a scissor link mechanism that supports the workbench 16 with respect to the support body 12 so as to be able to elevate. This scissors link mechanism is composed of a pair of X-shaped links 22 arranged to face each other in the left-right direction. The X-shaped link 22 includes links 24 and 26 extending in the front-rear direction and intersecting each other, a support shaft 28 for rotatably connecting the intersections of the links 24 and 26, and front ends 24A of the links 24 and 26. A support shaft 30 that rotatably connects 26A to the support 12 and the workbench 16, guides 24B and 26B at the rear ends 24B and 26B of the links 24 and 26 are not shown, and the workbench 16 is not shown. It is provided with a roller 32 that rotatably contacts the guide. The left and right rollers 32 are connected by a support shaft 31.

This scissor linkage includes a hydraulic cylinder (not shown). When the hydraulic cylinder is expanded and contracted, the crossing angles of the links 24 and 26 change and expand or contract, and the workbench 16 moves up and down between the ascending position and the descending position while always maintaining the horizontal state. Instead of the hydraulic cylinder, for example, an electric screw cylinder that expands or contracts the crossing angle of each of the links 24 and 26 by rotating the ball screw with a motor and moving the nut screwed to the ball screw can be used.

The vibration reduction mechanism 18 includes an elevating mechanism 14 in a state where the workbench 16 is raised and a vibration reduction device 34 for reducing the vibration generated in the workbench 16. For the vibration reducing device 34, for example, a damper such as an oil damper or an absorber can be used. The vibration reducing device 34 is erected in a brace shape in a structure formed between the left and right X-shaped links 22. More specifically, the vibration reducing device 34 includes the support shaft 28 and the front end 24A of the link 24, the support shaft 28 and the rear end 24B of the link 24, the support shaft 28 and the front end 26A of the link 26, and the support shaft 28 and the link 26. The rear ends 26B are connected in a brace shape in a plan view. The vibration reducing device 34 may be installed in the manner shown in FIGS. 1 and 4 (1), or may be installed in the manner shown in FIG. 4 (2). FIG. 4 (2) shows the front end 24A (26A) and the rear end 24B (26B) of the link 24 (26) directly connected in a brace shape.

According to this embodiment, the vibration reducing device 34 always operates so as to reduce the vibration generated in the X-shaped link 22. The operation of the vibration reducing device 34 functions regardless of the elevating position of the workbench 16. As a result, the shaking generated in the operating table 16 can be rapidly reduced. Therefore, the shaking generated in the workbench 16 can be rapidly reduced even in the raised position. Further, as shown in the figure, it is possible to improve the fit of the vibration reducing device 34 in the elevating mechanism 14.

(Embodiment 2)
Next, Embodiment 2 of the present invention will be described. In the second embodiment, the vibration reducing device is installed between the upper end portion and the lower end portion of the scissor link mechanism so as to be expandable and contractible as the elevating mechanism moves up and down.

As shown in FIG. 2, the workbench 200 according to the second embodiment includes a bogie main body 10, a support body 12, an elevating mechanism 14, a workbench 16 (table main body), and a vibration reducing device 36 of the present invention. And prepare. Since the work trolley 200 of the second embodiment has the same configuration as the work trolley 100 of the first embodiment except for the vibration reduction device 36, it is a component other than the vibration reduction device 36 described above. The description of is omitted.

The vibration reducing device 36 is installed between the upper end portion and the lower end portion of the scissor link mechanism so as to be expandable and contractible as the scissor link mechanism moves up and down. More specifically, the vibration reducing device 36 includes a columnar front device 38 that vertically connects the front ends 24A and 26A of the links 24 and 26 forming the X-shaped link 22, and the rear ends 24B of the links 24 and 26. It is composed of a columnar rear device 40 that connects 26Bs up and down. The front side device 38 and the rear side device 40 are oil dampers including a cylinder 42 provided on the lower side and a piston rod 44 freely inserted into the upper opening of the cylinder 42, and the expansion / contraction operation of the X-shaped link 22. That is, it can be expanded and contracted according to the raising and lowering operation of the workbench 16. In addition, instead of the oil damper, another type of damper or absorber can be used.

Inside the support 12 below the front device 38 and the rear device 40 and the bogie body 10, a vertical cylindrical support 46 having an open upper portion is provided, and the front device 38 and the rear device 40 are provided, respectively. The cylinder 42 can be accommodated. The support portion 46 corresponding to the rear side device 40 can move in the front-rear direction along a groove (not shown) extending continuously in the support body 12 and the bogie main body 10. In this configuration, at the position where the X-shaped link 22 contracts and the workbench 16 descends, the front side device 38 and the rear side device 40 contract, and the cylinder 42 is housed in the support portion 46. When the X-shaped link 22 expands and the workbench 16 rises, the cylinder 42 moves upward from the support portion 46 together with the piston rod 44 in response to the rise. When the raised position of the workbench 16 reaches a predetermined height (for example, the position where the workbench 16 is most raised), the height position of the cylinder 42 is fixed by a lock mechanism (not shown) and the cylinder 42 does not move up and down. Further, the positions of the front side device 38 and the rear side device 40 are located at the corners of the workbench 16. Instead of doing so, each cylinder 42 may be fixed in the support portion 46, and only the piston rod 44 may appear and disappear from the cylinder 42 and extend as the workbench 16 rises.

According to this embodiment, the vibration reducing device 36 operates so as to reduce the vibration generated in the workbench 16 at the raised position. Therefore, the shaking generated in the workbench 16 at the raised position can be rapidly reduced. Further, it works effectively in both directions (X direction and Y direction) against the shaking of the workbench 16.

(Embodiment 3)
Next, Embodiment 3 of the present invention will be described. In the third embodiment, the vibration reducing device is erected in a brace shape in the front and rear planes orthogonal to the left and right structural planes formed by the X-shaped links.

As shown in FIG. 3, the workbench 300 according to the third embodiment includes a bogie main body 10, a support 12, an elevating mechanism 14, a workbench 16 (table main body), and a vibration reducing device 48 of the present invention. And prepare. Since the work trolley 300 of the third embodiment has the same configuration as the work trolley 100 of the first embodiment except for the vibration reduction device 48, it is a component other than the vibration reduction device 48 described above. The description of is omitted.

The vibration reducing device 48 is erected in a brace shape in the front and rear planes orthogonal to the left and right structural planes formed by the X-shaped link 22. More specifically, the vibration reducing device 48 connects the upper and lower ends 24A and 26A of the links 24 and 26 and the upper and lower ends 24B and 26B of the links 24 and 26 in a brace shape in the front-rear direction. For the vibration reducing device 48, for example, a damper such as an oil damper or an absorber can be used.

According to this embodiment, the vibration reducing device 48 constantly operates so as to reduce the vibration generated in the X-shaped link 22. The operation of the vibration reducing device 48 functions regardless of the elevating position of the workbench 16. As a result, the shaking generated in the operating table 16 can be rapidly reduced. Therefore, the shaking generated in the workbench 16 can be rapidly reduced even in the raised position. The third embodiment has the highest effect of rapidly reducing the shaking of the workbench 16. It is also effective in reducing vibration in the twisting direction.

In the above embodiment, the case where the X-shaped link 22 forming the scissor link mechanism of the elevating mechanism 14 has a one-stage configuration in the vertical direction has been described as an example, but the present invention is not limited to this and is necessary. Depending on the ascending / descending distance (stroke), the X-shaped links 22 may be connected in two or more steps in the vertical direction to secure a high ascending position. Even in this way, the same effects as described above can be obtained.

As described above, according to the vibration reducing mechanism of the elevating table according to the present invention, the table body is arranged so as to be able to move up and down above the support, and the table body is arranged between the support and the table body. A vibration reduction mechanism for reducing vibration generated in an elevating table provided with an elevating mechanism for elevating and lowering between a support and a high place. Since the vibration reducing device for reducing the vibration generated in the table body is provided, the shaking generated in the table body at the raised position can be rapidly reduced.

Further, according to the vibration reducing mechanism of another elevating table according to the present invention, the elevating mechanism is a scissors link mechanism composed of at least a pair of X-shaped links arranged facing each other in the left-right direction, and the vibration reducing device is a vibration reducing device. Since it is erected in a brace shape in the structure formed between the left and right X-shaped links, it is possible to improve the fit of the vibration reducing device in the elevating mechanism.

Further, according to the vibration reduction mechanism of another elevating table according to the present invention, the elevating mechanism is a scissors link mechanism composed of at least a pair of X-shaped links arranged facing each other in the left-right direction, and the vibration reducing device is a vibration reducing device. Since it is installed between the upper end and the lower end of the scissor link mechanism so as to be able to expand and contract with the elevating operation of the elevating mechanism, it is possible to effectively reduce the vibration in the front, back, left and right directions generated in the table body.

Further, according to the vibration reducing mechanism of another elevating table according to the present invention, the elevating mechanism is a scissors link mechanism composed of at least a pair of X-shaped links arranged facing each other in the left-right direction, and the vibration reducing device is a vibration reducing device. , Since it is erected in a brace shape in the front and rear planes orthogonal to the left and right structural planes formed by the X-shaped links, it is possible to effectively reduce the shaking generated in the table body.

Further, according to the workbench according to the present invention, a workbench consisting of a bogie body having wheels at the lower part, a workbench consisting of an elevating table arranged above the bogie body, and a workbench installed between the bogie body and the workbench. Since the workbench is provided with an elevating mechanism for raising and lowering the workbench between the bogie body and a high place and the vibration reduction mechanism of the elevating table described above, it is possible to rapidly reduce the shaking generated in the workbench at the raised position.

As described above, the vibration reducing mechanism of the elevating table and the work trolley according to the present invention are useful for the elevating table and the work trolley used when working at a high place, and in particular, the lateral shaking of the table at the raised position is caused. Suitable for rapid reduction.

10 Dolly body 12 Support 14 Lifting mechanism 16 Workbench (table body)
18 Vibration reduction mechanism 20 Wheels 22 X-shaped link 24,26 Link 24A, 26A Front end 24B, 26B Rear end 28,30 Support shaft 32 Roller 34,36,48 Vibration reduction device 38 Front device 40 Rear device 42 Cylinder 44 Piston Rod 46 Support 100,200,300 Work trolley

Claims (2)

It occurs in an elevating table provided with a table body that can be raised and lowered above the support, and a raising and lowering mechanism that is placed between the support and the table body and raises and lowers the table body between the support and a high place. It is a vibration reduction mechanism for reducing vibration.
It is provided in the elevating mechanism and is equipped with an elevating mechanism with the table body raised and a vibration reduction device for reducing the vibration generated in the table body.
The elevating mechanism is a scissors link mechanism composed of at least a pair of X-shaped links arranged facing each other in the left-right direction, and the vibration reducing device is a front-rear front and rear orthogonal to the left and right structural surfaces formed by the X-shaped links. A vibration reduction mechanism for an elevating table, characterized by being a damper or absorber erected in a brace shape in a plane. A workbench consisting of a dolly body having wheels at the bottom and an elevating table placed above the dolly body, and a workbench installed between the dolly body and the workbench, the workbench is placed between the dolly body and a high place. A workbench characterized by comprising an elevating mechanism for elevating and lowering, and a vibration reducing mechanism for the elevating table according to claim 1.

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