JPH0522485U - Work platform of aerial work platform - Google Patents

Abstract

(57) [Summary] [Object] The present invention aims to provide a workbench of an aerial work vehicle in which the height of the handrail can be adjusted. For this purpose, an aerial work vehicle is provided with a handrail around which a handrail is provided and which can be moved up and down, and the height of the handrail can be adjusted by an elevating means.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a workbench of an aerial work vehicle in which the height of the handrail can be adjusted.

[0002]

[Prior art]

 At the current construction work sites, in order to carry out various construction materials efficiently, as well as assembling work efficiently and safely, an aerial work vehicle equipped with a workbench (bucket) at the tip of a boom has been introduced. It is the current situation.

[0003]

[Problems to be solved by the device]

 However, the aerial work vehicle 11 shown in FIG. 3, which has been conventionally introduced to such a work site, is equipped with a pair of steering wheels 11b on the front left and right sides of the bogie 11a and a pair of drive wheels on the rear left and right sides. 11c is provided, and a turntable 12 is provided in the upper center of the truck 11a. The turntable 12 can be swung with respect to the truck 11a by an oil pressure motor (not shown) provided in the truck 11a. Is configured.

Reference numeral 13 denotes a multi-stage boom whose base end is pivotally supported on the turntable 12 (the multi-stage boom 13 is a boom having a three-stage telescopic structure including a base end boom 13a, an intermediate boom 13b, and a tip boom 13c). ), The hoisting operation of the multistage boom 13 is configured to be performed by the hoisting cylinder 14 pivotally mounted on the lower surface side of the carriage 11a and the base end boom 13a, and the extension and contraction operations of the intermediate boom 13b and the tip boom 13c are performed. It is configured to be carried out by a telescopic cylinder (not shown) built in the multistage boom 13.

A workbench 15 is provided at the tip of the tip boom 13c, and a handrail 16 is provided around the upper surface of the floor member 15a of the workbench 15. By the way, the handrail 16 provided around the upper surface of the floor member 15a of the workbench 15 equipped at the tip of the multi-stage boom 13 of the aerial work vehicle 11 has a predetermined upper surface around the floor member 15a of the workbench 15. Since the horizontal members 15c are attached to the pillars 15b which are erected at the above intervals at predetermined upper and lower intervals, the handrail 16 itself has a constant height, that is, a worker who rides on the workbench 15 does not. The height was about the waist, and the structure was such that it could not adjust the height.

Therefore, for example, when the air conditioner duct 18 is mounted on the ceiling 17 as shown in FIG. Of course, it can be transported near the ceiling 17, but this transportation is also limited to a height where the upper half of the worker on the workbench 15 can move freely. In order to lift the transported air conditioner duct 18 to the mounting position on the ceiling 17, the air conditioner duct 18 cannot be mounted on the ceiling 17 unless at least the upper half of the worker's upper body is lifted by the worker. As described above, an operator supporting the air conditioner duct 18 and two workers for installing the air conditioner duct 18 are required.

Although it is possible to perform the work of mounting the air conditioner duct 18 by a single worker, such a single work requires the worker to be short enough to reach the height of the handrail 16. There were various problems such as forcing an unreasonable posture.

[0008]

[Means for Solving the Problems]

 The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a work platform for an aerial work vehicle in which the height of the handrail can be adjusted. Is a work platform for an aerial work vehicle equipped at the tip of an elevating mechanism that vertically expands and contracts, and includes a floor member and a handrail that is vertically erected around the upper surface of the floor member and is vertically extendable. The handrail is configured to extend and contract.

[0009]

[Action]

 Due to the above configuration, when mounting the air conditioner duct or other mounting member on the handrail of the workbench and transporting it, raise and lower the workbench by the elevating mechanism and place it near the ceiling, then expand and contract. By extending the handrail upward by the means, the mounting member can be lifted to the mounting position.

[0010]

【Example】

 Hereinafter, an embodiment of a workbench of an aerial work vehicle according to the present invention will be described in detail with reference to FIGS. 1 and 2. In the figure, 1 is an aerial work vehicle, and the aerial work vehicle 1 is equipped with a pair of steering wheels 1b on the front left and right sides of a bogie 1a and a pair of drive wheels 1c on the rear left and right sides. A turntable 2 is installed in the upper center of the trolley 1a, and the turntable 2 is configured to be rotatable with respect to the trolley 1a by a hydraulic motor (not shown) provided in the trolley 1a. ..

Reference numeral 3 denotes a multi-stage boom having a base end pivotally supported by the turntable 2 (the multi-stage boom 3 is a boom having a three-stage telescopic structure including a base end boom 3a, an intermediate boom 3b, and a tip boom 3c). ), The hoisting operation of the multistage boom 3 is configured to be performed by the hoisting cylinder 4 pivotally attached to the lower surface side of the carriage 1a and the base end boom 3a, and the telescopic operation of the intermediate boom 3b and the tip boom 3c is performed in the multistage. It is configured to be performed by a telescopic cylinder (not shown) built into the boom 3.

Reference numeral 5 denotes a workbench equipped at the tip of the tip boom 3c, and the workbench 5 is always in a horizontal state by an equilibrium holding device (not shown) regardless of the hoisting operation of the multistage boom 3. Held in. The workbench 5 includes a rectangular floor member 5a, a plurality of vertically extensible supports 6a that are vertically installed at predetermined intervals on the upper surface of the floor member 5a, and the upper and lower ends of the supports 6a. A handrail 6 composed of an edge frame 6b attached to the end, and a scissors in which a plurality of X-shaped arms 6c, which are respectively provided at opposite ends of the upper surface of the floor member 5a and rotatably connected at the centers, are connected upwardly in a plurality of stages. It is composed of a formula expansion and contraction means.

The scissor type expansion / contraction means pivots one of the lower end and the upper end of the X-shaped arm 6c to the base end and the tip of the column 6a standing on the corner portion of the floor member 5a. The lower end and the upper end of the arm 6c are attached so as to slide along the floor member 5a and the edge frame 6b, and both ends of the telescopic cylinder 7 are pivotally attached to the floor member 5a and the X-shaped arm 6c. However, both telescopic cylinders are controlled to telescopically move by the same amount.

Hereinafter, the operation of the workbench of the aerial work vehicle according to the present invention will be described based on the above configuration. That is, when the above work vehicle 1 is installed and the air conditioner duct 9 is mounted on the ceiling 8, for example, the air conditioner duct 9 is mounted on the handrail 6 as shown by a phantom line in FIG. For the first transportation, the multi-stage boom 3 is extended and the workbench 5 is raised with the worker standing up to the point where the worker's overhead is close to the ceiling 8, and then the worker is conditioned by the air conditioning duct 9 The retractable cylinder 7 is operated to reduce the size of the handrail 6 on which the frame 6b is mounted, and the space between the edge frame 6b of the handrail 6 and the lower arm 6c of the X-shaped arm 6c provided at the opposite ends of the upper surface of the floor member 5a. By making the size smaller, the left and right scissor type expansion and contraction means connected in plural stages at the same time are simultaneously extended by the same amount, thereby pushing up the edge frame 6b and transporting the air conditioner duct 9 to the mounting position on the ceiling 8.

When the air-conditioner duct 9 is mounted on the ceiling 8, the handrail 6 is extended upward by expanding the space between the lower arms 6c of the X-shaped arms 6c by the extension operation of the telescopic cylinder 7. The left and right scissors-type expansion and contraction means connected to each other are simultaneously reduced by the same amount to lower the edge frame 6b, and the work is completed.

[0016]

[Effect of the device]

 As described in detail above, the present invention is a workbench of an aerial work vehicle equipped at the tip of an elevating mechanism that vertically extends and contracts. Since it is composed of a handrail that is freely erected and a telescopic unit that expands and contracts the handrail, in addition to raising the workbench by extending the multi-stage boom during aerial work, the handrail installed on the workbench is further raised by the telescopic unit. Therefore, it is possible to raise the material, etc., which has been transported to a certain height by raising the workbench, above the operator's hand by using the handrail raising function. Since there is no work, and it is possible to continue supporting the material etc. until the mounting work of the material etc. is completed, a worker supporting the material etc. becomes unnecessary, and the work efficiency is improved, and the work is improved. Workers are not required to perform Since it is not forcing the posture has various excellent effects such that also reduced of labor workers.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a vehicle employing a work platform for an aerial work vehicle according to the present invention.

FIG. 2 is an enlarged perspective view of a main part of a work table of the aerial work vehicle of the same as above.

FIG. 3 is an overall perspective view of a vehicle showing a work platform of a conventional aerial work vehicle.

[Explanation of symbols]

 1 aerial work vehicle 1a bogie 1b steering wheel 1c drive wheel 2 turntable 3 multi-stage boom 3a base boom 3b intermediate boom 3c tip boom 4 hoisting cylinder 5 workbench 5a floor member 6 handrail 6a prop 6b edge frame 6c arm 7 telescopic Cylinder 8 Ceiling 9 Air conditioner duct

Claims (1)

[Scope of utility model registration request] 1. A work platform for an aerial work vehicle equipped at the end of a vertically elevating mechanism, which comprises a floor member and a handrail vertically erected around the upper surface of the floor member. And a workbench of an aerial work vehicle, comprising: