JP2019156518A - Vibration reduction mechanism for lifting table and work truck - Google Patents

Abstract

To provide a simple vibration reduction mechanism for a lifting table, which is capable of rapidly reducing horizontal shaking of a table at a high place, and a work truck.SOLUTION: A vibration reduction mechanism 18 is for reducing vibration generated at a lifting table which comprises a table body 16 disposed to be liftable above a support 12 and a lifting mechanism 14 disposed between the support 12 and the table body 16 so as to lift the table body 16 between the support 12 and a high place, and comprises a vibration reduction device 34 provided to the lifting mechanism 14 so as to reduce vibration generated in the lifting mechanism 14 in a state where the table body 16 is lifted and the table body 16.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vibration reduction mechanism for a lifting table and a work carriage.

  Conventionally, a lifting table such as a scissor lift (registered trademark) equipped with a lifting mechanism such as a scissors and a pantograph mechanism used during high-altitude work, and a working carriage using the lifting table as a work table are known. In such a work cart, when the lifting distance (stroke) is long, the work table often keeps shaking in the lateral direction at the raised position. It is not preferable to work on a shaking work table in terms of ensuring workability and safety. In addition, it is difficult to perform work with high construction accuracy on a shaking work table. 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, a rocking structure for an aerial work vehicle as shown in Patent Document 1 is known. In this structure, in an aerial work vehicle equipped with a plurality of lifting devices composed of at least one plane link mechanism that expands and contracts in one plane in the vertical direction from above the chassis, adjacent lifting devices are arranged orthogonally on the chassis, An elevator supported by the apparatus and a connecting means for connecting the work table are provided. By suppressing the lateral shaking generated in one lifting device by the lateral stiffness of the other lifting device, the rolling of each lifting device is reduced.

JP 2002-326794 A

  However, the above-described conventional anti-swing structure disclosed in Patent Document 1 requires that at least two lifting devices be arranged adjacent to each other at positions orthogonal to each other, and thus the structure may be complicated and cost may increase.

  For this reason, the development of a simple mechanism capable of rapidly reducing the lateral shaking of the work table (lifting table) at a high place has been demanded.

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

  In order to solve the above-described problems and achieve the object, a vibration reduction mechanism for a lifting table according to the present invention includes a table main body disposed so as to be able to be lifted and lowered above the support, and the support and the table main body. A vibration reducing mechanism for reducing vibration generated in a lifting table that is disposed and includes a lifting mechanism that lifts and lowers the table body between a support and a high place, and is provided in the lifting mechanism to raise the table body. And a vibration reducing device for reducing vibration generated in the table main body.

  In addition, in the above-described invention, the lifting / lowering table vibration reducing mechanism according to the present invention is a scissor link mechanism configured by at least a pair of X-shaped links opposed to each other in the left-right direction. The reduction device is characterized in that it is installed in a brace shape within a construction surface formed between the left and right X-shaped links.

  In addition, in the above-described invention, the lifting / lowering table vibration reducing mechanism according to the present invention is a scissor link mechanism configured by at least a pair of X-shaped links opposed to each other in the left-right direction. The reduction device is characterized in that it is installed between the upper end portion and the lower end portion of the scissor link mechanism so as to be extendable and retractable in accordance with the lifting operation of the lifting mechanism.

  In addition, in the above-described invention, the lifting / lowering table vibration reducing mechanism according to the present invention is a scissor link mechanism configured by at least a pair of X-shaped links opposed to each other in the left-right direction. The reduction device is characterized in that it is installed in a brace shape in the front and back planes orthogonal to the left and right construction surfaces constituted by X-shaped links.

  In addition, a work cart according to the present invention is installed between a cart main body having wheels at a lower portion thereof, a work table composed of a lifting table disposed above the cart main body, and the cart main body and the work table. It is characterized by comprising an elevating mechanism for elevating the vehicle between the carriage main body and a high place, and the above-described vibration reducing mechanism for the elevating table.

  According to the vibration reduction mechanism of the lifting table according to the present invention, the table main body is disposed so as to be able to be lifted and lowered above the support, and is disposed between the support and the table main body. A vibration reduction mechanism for reducing vibration generated in a lifting table including a lifting mechanism that lifts and lowers between the lifting mechanism and the lifting mechanism in a state in which the table body is lifted and vibration generated in the table body. Since the vibration reducing device for reducing the vibration is provided, it is possible to rapidly reduce the shaking generated in the table body at the raised position.

  Moreover, according to the vibration reduction mechanism of the other lifting table according to the present invention, the lifting mechanism is a scissor link mechanism configured by at least a pair of X-shaped links arranged opposite to each other in the left-right direction. In addition, since it is installed in a brace shape in the construction surface formed between the left and right X-shaped links, it is possible to improve the fit of the vibration reducing device in the lifting mechanism.

  Moreover, according to the vibration reduction mechanism of the other lifting table according to the present invention, the lifting mechanism is a scissor link mechanism configured by at least a pair of X-shaped links arranged opposite to each other in the left-right direction. Since the scissor link mechanism is installed so as to be able to expand and contract between the upper end portion and the lower end portion of the scissor link mechanism, it is possible to effectively reduce vibrations in the front, rear, left and right directions generated in the table body. There is an effect.

  Moreover, according to the vibration reduction mechanism of the other lifting table according to the present invention, the lifting mechanism is a scissor link mechanism configured by at least a pair of X-shaped links arranged opposite to each other in the left-right direction. Since it is installed in the form of braces in the front and rear surfaces orthogonal to the left and right construction surfaces constituted by the X-shaped links, it is possible to effectively reduce the shaking generated in the table body.

  Further, according to the work cart according to the present invention, the work body comprising a car body having a wheel at the lower part, a lifting table disposed above the car body, and installed between the car body and the work table, Since it includes the lifting mechanism that lifts and lowers the work table between the cart body and the high place and the above-described vibration reduction mechanism of the lifting table, it is possible to rapidly reduce the shaking generated on the work table at the raised position. Play.

FIG. 1 is a schematic perspective view showing a first embodiment of a vibration reduction mechanism for a lifting table and a work carriage according to the present invention. FIG. 2 is a schematic perspective view showing a second embodiment of the vibration reduction mechanism for the lifting table and the work carriage according to the present invention. FIG. 3 is a schematic perspective view showing a third embodiment of the vibration reduction mechanism for the lifting table and the work carriage according to the present invention. FIG. 4 is a schematic view of the main part of FIG.

  The vibration reduction mechanism and work carriage of the lift table according to the present invention are designed to rapidly reduce lateral shaking even when the lift table (work bench) is at a high place. Embodiments 1 to 3 of the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

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

  As shown in FIG. 1, a work cart 100 according to the first embodiment includes a cart body 10, a support 12, a lifting mechanism 14, a work table 16 (table body), and a vibration reduction mechanism 18 of the present invention. With. The support 12, the work table 16, and the lifting mechanism 14 constitute a lifting table. The work cart 100 according to the present embodiment is used, for example, at a construction site of a building, and is used to mount materials and equipment.

  The cart body 10 has a rectangular parallelepiped shape with four wheels 20 at the bottom. If 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 locations on the front left and right and two on the rear left and right in the lower part of the carriage body 10. The cart body 10 includes a braking device that can stop the position at a predetermined work place. The cart body 10 may be an autonomous traveling type, or may be a method in which an operator rides in a driver seat (not shown) and travels.

  The support 12 is for supporting the lifting mechanism 14 and is installed on the upper surface of the cart body 10. In the illustrated example, 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 work table 16 is a table on which a worker who performs work at a high place or the like gets on or loads an article, and is disposed above the support 12 so as to be lifted and lowered. In the example shown in the figure, the work table 16 is drawn as a simple square plate, but a handrail, a fence, or the like may be provided around the work table 16. Guides (not shown) extending in the front-rear direction are provided on the left and right sides of the lower surface of the work table 16.

  The elevating mechanism 14 includes a scissor link mechanism that supports the work table 16 so as to be movable up and down with respect to the support 12. This scissor 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 that extend in the front-rear direction and intersect each other, a support shaft 28 that rotatably connects the intersections of the links 24 and 26, and front ends 24A of the links 24 and 26. 26A is pivotally connected to the support 12 and the work table 16, the rear ends 24B and 26B of the links 24 and 26 are guides (not shown) of the support 12, and the work table 16 is not shown. And a roller 32 that comes into contact with the guide so as to be able to roll. The left and right rollers 32 are connected by a support shaft 31.

  The scissor link mechanism includes a hydraulic cylinder (not shown). When the hydraulic cylinder is expanded and contracted, the crossing angle of the links 24 and 26 changes and expands and contracts, and the work table 16 moves up and down between the raised position and the lowered position while maintaining the horizontal state at all times. Instead of the hydraulic cylinder, for example, an electric screw cylinder that rotates the ball screw with a motor and moves a nut screwed to the ball screw to expand and contract the intersection angle of the links 24 and 26 can be used.

  The vibration reduction mechanism 18 includes a lifting mechanism 14 in a state where the work table 16 is raised and a vibration reduction device 34 for reducing vibration generated in the work table 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 installed in a brace shape within a construction surface 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 plan view. The vibration reducing device 34 may be installed in a manner as shown in FIGS. 1 and 4 (1), or may be installed in a manner as shown in FIG. 4 (2). FIG. 4 (2) shows a structure in which the front end 24A (26A) and the rear end 24B (26B) of the link 24 (26) are directly connected in a brace shape.

  According to the present 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 lift position of the work table 16. As a result, it is possible to rapidly reduce the shaking generated in the operating table 16. Therefore, the shaking generated on the work table 16 can be rapidly reduced even at the raised position. Moreover, as shown in the figure, the accommodation of the vibration reducing device 34 in the elevating mechanism 14 can be improved.

(Embodiment 2)
Next, a second embodiment 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 extendable and retractable along with the lifting / lowering operation of the lifting / lowering mechanism.

  As shown in FIG. 2, the work cart 200 according to the second embodiment includes a cart body 10, a support body 12, an elevating mechanism 14, a work table 16 (table body), and the vibration reduction device 36 of the present invention. With. The work cart 200 according to the second embodiment has the same configuration as that of the work cart 100 according to the first embodiment except for the vibration reduction device 36. Therefore, the components other than the vibration reduction device 36 described above. The description about 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 able to expand and contract with the lifting / lowering operation of the scissor link mechanism. More specifically, the vibration reducing device 36 includes a columnar front device 38 that vertically connects the front ends 24A, 26A of the links 24, 26 forming the X-shaped link 22, and the rear ends 24B of the links 24, 26. It consists 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 that is removably inserted into an upper opening of the cylinder 42, and the X-shaped link 22 is expanded or contracted. That is, it can be expanded and contracted according to the raising / lowering operation of the work table 16. Note that other types of dampers and absorbers may be used instead of the oil dampers.

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

  According to the present embodiment, the vibration reducing device 36 operates so as to reduce the vibration generated on the work table 16 in the raised position. For this reason, the shaking which arises on the workbench 16 in the raised position can be reduced rapidly. Further, it effectively works in both directions (X direction and Y direction) with respect to the shaking of the work table 16.

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

  As shown in FIG. 3, a work cart 300 according to the third embodiment includes a cart body 10, a support body 12, an elevating mechanism 14, a work table 16 (table body), and the vibration reduction device 48 of the present invention. With. The work cart 300 according to the third embodiment has the same configuration as that of the work cart 100 according to the first embodiment except for the vibration reduction device 48. Therefore, the components other than the vibration reduction device 48 described above. The description about is omitted.

  The vibration reducing device 48 is installed in a brace shape on the front and rear surfaces orthogonal to the left and right construction surfaces constituted by the X-shaped links 22. More specifically, the vibration reducing device 48 connects the upper and lower ends of the front ends 24A and 26A of the links 24 and 26 and the upper and lower portions of the rear ends 24B and 26B of the links 24 and 26 in a brace shape as viewed 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 the present embodiment, the vibration reducing device 48 always 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 lift position of the work table 16. As a result, it is possible to rapidly reduce the shaking generated in the operating table 16. Therefore, the shaking generated on the work table 16 can be rapidly reduced even at the raised position. The effect of rapidly reducing the shaking of the workbench 16 is the highest in the third embodiment. It is also effective in reducing vibration in the torsional 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 lifting distance (stroke), the X-shaped link 22 may be connected in two or more stages in the vertical direction to ensure a high ascending position. Even if it does in this way, there can exist an effect similar to the above.

  As described above, according to the vibration reduction mechanism of the lifting table according to the present invention, the table main body disposed so as to be able to be lifted and lowered above the support, and the table main body is disposed between the support and the table main body. A vibration reduction mechanism for reducing vibration generated in a lifting table provided with a lifting mechanism that lifts and lowers between a support and a high place, the lifting mechanism in a state in which the table body is raised, provided in the lifting mechanism; Since the vibration reducing device for reducing the vibration generated in the table main body is provided, the vibration generated in the table main body at the raised position can be rapidly reduced.

  Moreover, according to the vibration reduction mechanism of the other lifting table according to the present invention, the lifting mechanism is a scissor link mechanism configured by at least a pair of X-shaped links arranged opposite to each other in the left-right direction. In addition, since it is installed in a brace shape within the construction surface formed between the left and right X-shaped links, it is possible to improve the fit of the vibration reducing device in the lifting mechanism.

  Moreover, according to the vibration reduction mechanism of the other lifting table according to the present invention, the lifting mechanism is a scissor link mechanism configured by at least a pair of X-shaped links arranged opposite to each other in the left-right direction. Since the scissors link mechanism is installed so as to be able to expand and contract between the upper end portion and the lower end portion of the scissor link mechanism, it is possible to effectively reduce front-rear and left-right vibrations generated in the table body.

  Moreover, according to the vibration reduction mechanism of the other lifting table according to the present invention, the lifting mechanism is a scissor link mechanism configured by at least a pair of X-shaped links arranged opposite to each other in the left-right direction. In addition, since it is installed in the form of braces in the front and rear surfaces orthogonal to the left and right construction surfaces constituted by X-shaped links, it is possible to effectively reduce the shaking generated in the table body.

  Further, according to the work cart according to the present invention, the work body comprising a car body having a wheel at the lower part, a lifting table disposed above the car body, and installed between the car body and the work table, Since the elevating mechanism for elevating the work table between the carriage main body and the high place and the vibration reducing mechanism for the elevating table described above are provided, the shaking generated on the work table at the raised position can be rapidly reduced.

  As described above, the vibration reduction mechanism and work carriage of the lift table according to the present invention are useful for the lift table and work carriage used when working at a high place, and in particular, the table is shaken in the lateral direction at the raised position. Suitable for rapid reduction.

10 Cart Body 12 Support 14 Lifting Mechanism 16 Work Table (Table Body)
18 Vibration reduction mechanism 20 Wheel 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 side device 40 Rear side device 42 Cylinder 44 Piston Rod 46 Support unit 100, 200, 300 Working cart

Claims (5)

Produced in an elevating table comprising a table main body disposed above and below the support body, and an elevating mechanism disposed between the support body and the table body, and elevating and lowering the table main body between the support body and the high place. A vibration reduction mechanism for reducing vibration,
A lifting / lowering table vibration reduction mechanism, comprising: a lifting / lowering mechanism provided in the lifting / lowering mechanism, wherein the lifting / lowering mechanism in a state where the table main body is raised; and a vibration reducing device for reducing vibration generated in the table main body.   The elevating mechanism is a scissor link mechanism composed of at least a pair of X-shaped links arranged opposite to each other in the left-right direction, and the vibration reducing device braces in the plane formed between the left and right X-shaped links. The vibration reducing mechanism of the lifting table according to claim 1, wherein the vibration reducing mechanism is installed in a shape.   The lifting mechanism is a scissor link mechanism composed of at least a pair of X-shaped links arranged opposite to each other in the left-right direction, and the vibration reducing device moves the lifting mechanism between the upper end portion and the lower end portion of the scissor link mechanism. The vibration reducing mechanism of the lifting table according to claim 1, wherein the vibration reducing mechanism is installed so as to be extendable and retractable.   The elevating mechanism is a scissor link mechanism configured by at least a pair of X-shaped links arranged opposite to each other in the left-right direction, and the vibration reducing device is arranged before and after orthogonal to the left and right construction surfaces configured by the X-shaped links. The vibration reducing mechanism for an elevating table according to claim 1, wherein the vibration reducing mechanism is installed in a brace shape in a plane.   Installed between the bogie body and the work place, the work body comprising a bogie body having wheels in the lower part, a work table composed of a lifting table disposed above the car body, and the work body between the bogie body and the work place. A work cart comprising an elevating mechanism for elevating and a vibration reducing mechanism for the elevating table according to any one of claims 1 to 4.

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