JP2003267675A - Worktable for high lift work - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a worktable for high lift work capable of avoiding an obstacle and extending an outrigger, and capable of selecting a place where there is a sufficient space in the height direction and fixing a truck by grounding the outrigger in the place. <P>SOLUTION: The worktable for high lift work comprises the truck 11, a table 15 mounted on the truck 11 in such away that it can be lifted via a lifting device 14, an auxiliary table 32 mounted inside the table 15 to be extended/ contracted in the front/rear directions, telescopic supports 41a and 41b, and outriggers 40a and 40b. The telescopic supports 41a and 41b are rotatable, piercing front and rear machine frames 12 of the truck 11, to be extended/ contracted to the front of the truck 11. The outriggers 40a and 40b are mounted at tips of the telescopic supports at right angles to the telescopic supports, and can be revolved in the front of the truck. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerial workbench used for work at a high altitude, and more particularly to an aerial workbench capable of installing an outrigger in a narrow space.

[0002]

2. Description of the Related Art Conventionally, an outrigger device has been used for fixing a bogie in a fixed position in a stable state. The outrigger device is stored inside the trolley body when it is stored, and when used, the so-called telescopic columns for installation around the trolley are extended horizontally to adjust the outrigger height and float the wheels of the trolley to keep the trolley horizontal. Is used to hold. For example, in Japanese Patent Laid-Open No. 10-277967,
It describes a lifting device for use indoors and outdoors. In this lifting platform device, a work platform is provided on a grounding base equipped with wheels so that it can be raised and lowered, and a mechanism for floating the wheels above and below the floor can be raised and lowered without using a hydraulic cylinder. Further, Japanese Patent Laid-Open No. 10-35435 discloses an aerial workbench equipped with an outrigger that can be easily installed and requires a small storage space.
This aerial work platform has an outrigger body frame and a grounding leg attached to the tip of a bolt screwed into the sleeve formed at the tip of the work platform.When stored, the stopper pin keeps the outrigger body frame almost vertical. A flip-up outrigger is adopted, which is held in a flipped up position, and the grounding leg at the tip is held in contact with the installation surface by a stopper pin during use, and the handle is turned to adjust the outrigger height. .

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the lift device described in Japanese Patent No. 7967, the support legs (outriggers) can be extended in the front-rear direction, but are provided downward at the four corners of the base, so that the support legs are extended and grounded. Takes space. Further, since the work platform for high places described in JP-A-10-35435 also employs a flip-out type outrigger, a space for grounding the grounding leg is required. However, when working at a high place, the work space does not always have a sufficient space, and especially when there is an obstacle in front, the height to avoid the obstacle and ground the outrigger is high. A workbench was requested. Therefore, the present invention provides an aerial work platform that can avoid obstacles and extend the outrigger, and can fix the trolley by selecting a place with a margin in the height direction and grounding the outrigger. The purpose is to do.

[0004]

The aerial work platform of the present invention comprises:
A bogie, a table provided on the bogie so as to be able to move up and down through an elevating device, an auxiliary table which is provided inside the table and is extendable back and forth, and a bogie provided by penetrating a body frame before and after the bogie. A telescopic strut that is both expandable and rotatable in the front of, and an outrigger that is provided at the tip of the expandable strut in a direction perpendicular to the expandable strut and is pivotally provided on the front surface of the carriage. Characterize. In such an aerial work platform, the telescopic columns are provided in plurality, and the rotary rings are fitted around the telescopic columns, respectively, and the rotary rings are pivotally supported by a connecting rod. It is desirable to rotate one of the rotating rings so that the outriggers can be rotated in synchronization. In addition, a plurality of the telescopic columns are provided, and rotating rings are fitted around the telescopic columns, respectively, and the rotating rings are pivotally supported by connecting rods, and the base is pivoted to the body frame. It is desirable that the outriggers be swung synchronously by rotating one of the rotating rings by expanding and contracting the supported hydraulic cylinder.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION (Embodiment 1) Embodiment 1 of an aerial work platform according to the present invention will be described below with reference to the drawings. FIG. 1 is a rear view showing a state in which the table of the aerial workbench of the present invention is raised. FIG. 2 is a plan view showing a table of an aerial work platform according to the present invention. Figure 3
FIG. 4 is a schematic explanatory view showing an extension mechanism of an outrigger.
FIG. 4 is a schematic explanatory view showing the rotating mechanism of the outrigger. FIG. 5 is a schematic explanatory view showing the operation of the aerial work platform of the present invention. FIG. 6 is a rear view showing the aerial work platform in a state in which the X-shaped link has two stages.

First, the overall structure of the aerial workbench of the present invention will be described. As shown in FIGS. 1 and 2, a machine body frame 12 is provided on a carriage 11, and casters 13 are provided on the lower, front, rear, left and right sides of the machine body frame 12. A table 15 is provided at the upper end of the dolly 11 via a lifting device 14 so as to be lifted and lowered. An auxiliary table 16 is arranged on the table 15.

The elevating device 14 is provided with two lower rails 16 on the both sides of the body frame 12 which are parallel to each other and extend in the left-right direction in FIG.
Two upper rails 17 are fixed to the lower part of the table 15 in the left-right direction so as to correspond to the lower rails 16, and a pair of front and rear X-shaped links 18 are arranged between the upper rails 17 and the lower rails 16. .

Next, the X-shaped links 18 provided on the front and rear of the carriage 11 on one side will be described. The X-shaped link 1
As shown in FIG. 1, 8 is usually composed of one set. The links 19 and 20 constituting the X-shaped link 18 are pivotally connected to each other at the center by a pivot 21, and the lower end of the link 20 is rotatably supported by the left portion of the lower rail 16 by a pivot 22 to the lower end of the link 19. Is provided with a pivot 23 and rollers 24 are provided at both ends thereof, and the rollers 24 are fitted to the lower rail 16 so as to be slidable in the left-right direction.

The upper end of the link 19 is at the table 15
Is pivotally supported by a pivot shaft 25 on the lower left side of the link, and a pivot shaft 26 is provided at the upper end of the link 20. Rollers 27 are rotatably supported at both ends of the pivot shaft 26 so that the rollers 27 slide in the left and right direction of the upper rail 17. It is movably fitted.

The base portion 29 of the lifting cylinder 28 is pivotally supported on the machine frame 12, while the tip 31 of the piston rod 30 of the lifting cylinder 28 is attached to the link 1
It is pivoted from the center of 9. Therefore, when this elevating cylinder 28 is extended, the link 19 is pulled up, the pivot 23 slides to the left, and the pivot 22 and the pivot 23,
And the distance between the pivots 25 and 26 is narrowed,
The roller 24 of the pivot 23 slides on the lower rail 16, the roller 27 on the pivot 26 slides on the upper rail 17,
The X-shaped link 18 is closed in the left-right direction, and the table 15
Will rise. On the contrary, when the lifting cylinder 28 is contracted, the X-shaped link 18 is expanded in the left-right direction and the table 15 is lowered.

Then, as shown in FIG.
An auxiliary table 32 is arranged on the upper side so as to be slidable in the front-rear direction (direction of arrow Q) and can be extended in front of the carriage 11. The sliding extension / contraction mechanism of the auxiliary table 32 is, for example,
A hydraulic cylinder (not shown) that connects the rear end of the auxiliary table 32 and the rear end of the table 15 is provided, and the auxiliary table 32 can be slid and expanded in the front-rear direction by driving the hydraulic cylinder. . In addition, instead of being driven by a hydraulic cylinder, a known mechanism such as a screw screw can be used for sliding expansion / contraction. Further, it can be slid and expanded even manually.

The table 15 and the auxiliary table 32
Is a bottom portion 33 having a space large enough to allow one operator to stand and move on the spot, and is erected from the peripheral portion of the bottom portion 33 so as to surround substantially the lower half of the worker from the front, back, left and right. It has a guard fence 34. In the present embodiment, the auxiliary table 32 has substantially the same width W as the table 15 and has a length L2 that is approximately ½ of the length L1 of the table 15 in the front-rear direction, but this dimension is not essential, It is possible to change W and L2 appropriately.

In the above structure, when carrying out work at a high place, for example, work such as cleaning or repairing the body of an airplane or a helicopter, it is necessary to move the trolley 11 to move the work platform to a destination. The table 15 is moved up and down to an appropriate height by means of the work, and when work in the upper center part of the machine body is required, the auxiliary table 32 is extended, and the worker can move to and work on the auxiliary table 32. it can.

As described above, in the aerial workbench of the present invention, the table 15 can be moved up and down by the elevating device 14 and the auxiliary table 32 is extended so that the table 15 is further forward than the position of the aerial workbench. Can work in position. When the elevating device 14 is lowered, the table 15 can be lowered to the vicinity of the ground, and the ladder 35 can be used to easily get on and off the operator.

Next, the outrigger 40 provided on the aerial work platform of the present invention will be described with reference to FIGS.
As shown in FIG. 3, the outriggers 40a and 40b are provided with telescopic columns 41a and 41b at two front end portions of the bogie 11.
Is provided at a right angle at the ends of the telescopic columns 41a and 41b. Hydraulic cylinders are provided inside the telescopic columns 41a and 41b, respectively, and the outriggers 40a and 40b can be telescopically extended in front of the carriage 11 with a stroke of about 540 mm, for example. Further, by extending the hydraulic cylinders provided in the outriggers 40a and 40b, the lower part of the outriggers can be grounded to the ground to fix the carriage.

Further, the telescopic columns 41a and 41b are fitted with fixing rings 43a and 43b in their midway portions 42a and 42b so as to surround the peripheries of the telescopic columns 41a and 41b, and the outer circumferences of the fixing rings 43a and 43b. Is rotatably attached in the left-right direction (arrow R) through the body frame 12 of the carriage 11.

Then, as shown in FIG. 4, on the rear side of the carriage 11, the rear end portions 44 of the telescopic columns 41a and 41b.
Rotation rings 45a and 45b are fitted to the a and 44b so as to surround the circumferences of the telescopic columns 41a and 41b, and the outer peripheries of the rotation rings 45a and 45b pass through the machine body frame 12 of the bogie 11 in the left-right direction ( It is rotatably attached to the arrow S).

Further, pivots 47a and 47b are provided on the projecting corners 46a and 46b formed on a part of the outer circumferences of the rotary rings 45a and 45b, and the pivots 47a and 47b are provided.
A connecting rod 48 is rotatably supported at both ends of b so as to be movable in the left and right arrow P direction so as to rotate the rotating rings 45a and 45b synchronously.

The arrow S of the rotating rings 45a and 45b
The rotation of the piston rod 5 of the hydraulic cylinder 49
No. 0 is pivotally supported on the pivot shaft 47a, and the hydraulic cylinder 4
This can be done by pivotally supporting the base portion 51 of the vehicle body frame 12.

Therefore, when the hydraulic cylinder 49 is extended, the pivot shaft 47a is rotated counterclockwise as indicated by an arrow S in FIG. 4, and the rotation ring 45a is rotated counterclockwise.
The telescopic column 41a fitted to the rotating ring 45a also rotates counterclockwise. Therefore, along with this, the outrigger 40a provided at the tip of the telescopic column 41a also turns. The operation causes the other rotating ring 45b pivotally supported by the connecting rod 48 to rotate, and similarly the outrigger 40b.
Can also be turned synchronously with the outrigger 40a.

As described above, by extending and contracting the hydraulic cylinder 49, the outriggers 40a, 4a provided on the left and right of the front portion of the bogie are provided.
The longitudinal direction (stretching direction) of 0b can be synchronously turned in the arrow T direction on the front surface of the carriage. That is,
It can be turned horizontally and vertically on a plane parallel to the front surface of the carriage 11. Such a turning function of the outrigger works effectively when there are obstacles 61a and 61b in front of which the outrigger is going to be extended. For example,
As shown in FIG. 5, the outriggers 4a, 40b are sewn in the gaps between the obstacles 68a, 68b, 68c by turning the outriggers 40a, 40b in the longitudinal direction to make them horizontal once.
0a and 40b are inserted, and the outrigger 4 is inserted again after the insertion.
0a, 40b can be vertically swung, and the outriggers 40a, 40b can be vertically installed at a place where there is a margin in the height direction to fix the carriage 11.

By removing the connecting rod 48 and individually attaching and operating hydraulic cylinders to the left and right rotating rings 45a and 45b, the longitudinal directions of the left and right outriggers 40a and 40b can be separately turned. Further, although not shown, the rotation rings 45a and 45b can be rotated synchronously or independently by a reduction motor instead of the hydraulic cylinder 49.

(Second Embodiment) Next, a second embodiment of the aerial work vehicle of the present invention will be described. Embodiment 2
Has a two-stage X-shaped link, but the other parts are the same as those in the first embodiment, and the description of the same parts is omitted. As shown in FIG. 6, two sets of X-shaped links are vertically connected so that the table 15 can be lifted up to a high level. In the case of the second embodiment,
The lower end of the lower link 60 is pivotally supported by the pivot 62 at the lower left portion of the lower rail 61, and
A pivot 63 is provided at the lower end of the roller 6 and the roller 6 is attached to the pivot 63.
The roller 64 is rotatably supported, and the roller 64 is fitted to the lower rail 61 so as to be slidable in the left-right direction. Further, the middle part of the lower link 60 is pivotally supported by a pivot 65.

The upper end of the lower link 60 is pivotally supported by the lower portion of the upper link 70 and pivots 66a and 66b, and
The upper end of 0 is pivotally supported by a pivot 71 at the lower left portion of the table 15, and a pivot 72 is provided at the upper end of the upper link 70. A roller 73 is rotatably pivoted on the pivot 72 so that the roller 73 Is fitted to the upper rail 74 slidably in the left-right direction. Also, the upper link 70
The middle part is pivotally supported by a pivot 75.

The base 81 of the lifting cylinder 80 is pivotally supported by the machine frame 12, while the tip of the piston rod 82 of the lifting cylinder 80 is pivotally supported by the center of the link 67. Therefore, the lifting cylinder 80
When the axis is extended, the axis 65 is pulled up and the axis 6
3 slides to the left, and pivots 62 and 63, and pivot 6
6a and the pivot 66b, and the intervals between the pivot 71 and the pivot 72 are narrowed, the roller 64 of the pivot 63 slides on the lower rail 61, and the roller 73 on the pivot 72 slides on the upper rail 74 to form an X-shape. The links 60 and 70 are closed in the left-right direction, and the table 15 is raised. vice versa,
When the lifting cylinder 80 is contracted, the X-shaped links 60, 70
Is spread in the left-right direction and the table 15 is lowered.

[0026]

As described above, the present invention has the following effects. That is, since a table is provided on the carriage so as to be able to move up and down through an elevating device, and an extendable and retractable auxiliary table is provided so as to be extendable and retractable in the front-back direction of the table, a wide working range can be achieved by raising and lowering the table. Therefore, it is possible to easily approach the desired position without moving the carriage, and it is possible to improve work efficiency.

Further, since the outrigger can be turned freely in the longitudinal direction, it is possible to extend the outrigger while avoiding obstacles, and select a place having a margin in the height direction to fix the bogie by grounding the outrigger. Can be made. Further, by providing a connecting rod for synchronously rotating the telescopic column, one hydraulic cylinder can synchronously swivel the longitudinal direction of the plurality of outriggers.

[Brief description of drawings]

FIG. 1 is a rear view showing a state in which a table of an aerial workbench of the present invention is raised.

FIG. 2 is a plan view showing a table of an aerial work platform according to the present invention.

FIG. 3 is a schematic explanatory view showing an extension mechanism of an outrigger.

FIG. 4 is a schematic explanatory view showing a rotation mechanism of an outrigger.

FIG. 5 is a schematic explanatory view showing the operation of the aerial work platform of the present invention.

FIG. 6 is a rear view showing the aerial work platform in a state where the X-shaped link has two stages.

[Explanation of symbols]

W: Table width W: width of auxiliary table L1: Length of table L2: Length of auxiliary table 11: trolley 12: Airframe frame 13: Caster 14: Lifting device 15: Table 16: Auxiliary table 16: Lower rail 17: Upper rail 18: X-shaped link 19, 20: Links 21,22,23: Axis 24: Roller 25,26: Axis 27: Roller 28: Lifting cylinder 29: Base 31: Piston rod 32: Auxiliary table 33: bottom 34: Guard fence 35: ladder 40a, 40b: outrigger 41a, 41b: Telescopic support 42a, 42b: midway part 43a, 43b: fixing ring 44a, 44b: rear end 45a, 45b: rotating ring 46a, 46b: corners 47a, 47b: Axis 48: Connecting rod 49: Hydraulic cylinder 50: Piston rod 51: Base 52: Castor 60: Down link 61: Lower rail 62, 63, 65: Axis 64: roller 66a, 66b: Axis 67: Link 68a, 68b, 68c: obstacles 70: Top link 71, 72: Axis 73: Roller 74: Upper rail 75: Axis 80: Lifting cylinder 81: Base 82: Piston rod

Claims (3)

[Claims] 1. A trolley, a table that is vertically movable on the trolley via a lifting device, an auxiliary table that is provided inside the table and is extendable back and forth, and a body frame in front of and behind the trolley. An expandable and rotatable telescopic support provided in front of the bogie, and an outrigger provided at the front end of the telescopic support in a direction perpendicular to the telescopic support and pivotable on the front surface of the bogie. ,
Aerial work platform with. 2. The plurality of telescopic columns are provided,
Rotation rings are fitted around the telescopic columns, respectively, and the rotation rings are pivotally supported by a connecting rod. By rotating one of the rotation rings, the turning of the outriggers is synchronized. The aerial work platform according to claim 1, which is performed. 3. A plurality of telescopic columns are provided,
A rotating ring is fitted around each of the telescopic columns, and the rotating rings are pivotally supported by a connecting rod. The hydraulic cylinder whose base is pivotally supported on the machine frame allows one of the rotating rings to be extended. The aerial work platform according to claim 1, wherein the outriggers are swung synchronously by rotating the.