JPH0549790U - Aerial work vehicle - Google Patents

Abstract

(57) [Summary] [Purpose] To expand the work range by making it possible to move the work platform that can be raised and lowered. [Structure] A work table 11 including an inner frame 12 and an outer frame 14 slidable with respect to the inner frame 12 is attached to a support arm that is vertically swingably attached to a carriage 1. The outer frame 14 slides back and forth as the cylinder moves back and forth.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to an aerial work vehicle in which the height of a workbench can be changed.

[0002]

[Prior Art]

 Conventionally, a workbench is attached to the tip of a vertically swingable support arm attached to a trolley, and the workbench can be raised and lowered in a horizontal position by swinging the support arm up and down. The work vehicle was known.

[0003]

[Problems to be solved by the device]

 However, conventional work platforms can only raise and lower the workbench, so to perform work at a distance from the workbench, move the workbench to bring the workbench to that location. There was an inconvenience that I had to go to.

The present invention has been made in view of the above circumstances. Not only can the workbench be moved up and down, but the workbench provided at an arbitrary height can be moved back and forth. The objective is to provide an aerial work vehicle that can bring the work platform to that location without moving the cart if it is a little away from the location.

[0005]

[Means for Solving the Problems]

 The aerial work vehicle of the present invention has a carriage, a support arm attached to the carriage so as to be vertically swingable, a driving means for swinging the support arm up and down, and an inner portion attached to the tip of the support arm. A workbench including a frame and an outer frame slidably attached to the inner frame, and a push / pull means interposed between the inner frame and the outer frame.

[0006]

[Action]

 With this structure, the outer frame is slid and pushed out from the inner frame by extending the push-pull means, and the outer frame is slid and pulled toward the inner frame side by contracting the push-pull means.

[0007]

【Example】

 FIG. 1 is a schematic side view of an aerial work vehicle according to an embodiment of the present invention, FIG. 2 is a plan view of a main part seen from below, and FIG. 3 is a vertical sectional front view of the main part.

An aerial work vehicle can move to a work site by running a dolly 1 having crawler type running wheels 2. A trolley 1 is provided with a support 3, and a swivel 5 is attached to the support 3 via a vertical shaft 4. Then, by supporting the base end portions 7a of the pair of left and right support arms 7 on the horizontal shaft 6 provided on the swivel base 5, the support arm 7 can swing up and down about the horizontal shaft 6. .. Further, a driving means 9 for swinging the support arm 7 up and down is provided between the support shaft 8 which is laterally installed in the middle of the support arm 7 and the swivel base 5. The drive means 9 has a screw shaft mechanism in which the screw shaft is pushed back and forth with respect to the nut body by rotating the screw shaft screwed into the nut body, and the piston rod is pushed and pulled back using fluid pressure. It is possible to employ various known mechanisms such as such a cylinder and a multiple link mechanism that is expanded and contracted by bending and extending the multiple links.

A horizontal shaft 10 is horizontally mounted on a tip portion of the support arm 7, and a workbench 11 is attached to the horizontal shaft 10. The workbench 11 includes a narrow inner frame 12, a plurality of support rollers 13 provided on the inner frame 12, and an outer frame 14 wider than the inner frame 12, and is provided on the outer frame 14. The guide rail 15 thus formed is made to follow the support roller 13. A cylinder 22, which is an example of pushing and pulling means, is interposed between the support member 20 provided on the inner frame 12 and the support member 21 provided on the outer frame 14. Instead of the cylinder 22, the pushing / pulling means may employ each of the mechanisms exemplified as the driving means 9.

The horizontal shaft 10 is connected to a workbench horizontal maintaining link mechanism 16 for always keeping the workbench 11 in a horizontal posture when the support arm 7 is vertically swung. The link mechanism 16 includes a sprocket 17, 18, a chain 19, and a turnbuckle interposed between the chains 19 and the like, and the configuration itself is publicly known, and therefore the description thereof is omitted here.

With the above configuration, when the swivel base 5 is swung horizontally around the vertical axis 4, the workbench 11 moves in the horizontal direction. Further, when the drive means 9 is extended, the support arm 7 swings up and down as shown by arrows A and B in FIG. Further, when the cylinder 22 is moved in and out, the outer frame 14 is guided by the support roller 13 and moved back and forth. Therefore, by combining the swing of the swivel base 5, the raising and lowering of the work platform 11, and the withdrawal of the outer frame 14, it is possible to bring the work platform 11 to a wide range without moving the carriage 1. .. Therefore, the work place can be moved smoothly and workability is improved.

[0012]

[Effect of the device]

 According to this invention, the position of the workbench can be changed not only up and down but also back and forth, so that there is an effect that work can be performed in a wide range without moving the trolley.

[Brief description of drawings]

FIG. 1 is a schematic side view of an aerial work vehicle according to an embodiment of the present invention.

FIG. 2 is a plan view of a main part including a workbench of the aerial work vehicle as seen from below.

FIG. 3 is a vertical sectional front view of a workbench.

[Explanation of symbols]

 1 dolly 7 support arm 9 drive means 11 workbench 12 inner frame 14 outer frame 22 cylinder (push / pull means)

Claims (1)

[Scope of utility model registration request] 1. A dolly, a supporting arm attached to the dolly so as to be vertically swingable, a driving means for oscillating the supporting arm up and down, an inner frame attached to a tip end of the supporting arm, and an inner portion of the inner frame. An aerial work vehicle comprising: a work platform having an outer frame slidably attached to the frame; and a push-pull means interposed between the inner frame and the outer frame.