JPH06219693A - High place working vehicle with accident preventing curtain - Google Patents

Abstract

PURPOSE:To suppress to a certain extent the rise of an accident preventing curtain for an altitude working vehicle and reduce the cost, wherein the vehicle is so constructed that a working table fitted with the curtain can rise and fall. CONSTITUTION:An altitude working vehicle fitted with an accident preventing curtain is so structured that a working table 14 is mounted upon the running vehicle body 10 as capable of being elevated and sunk by an elevating/sinking mechanism 12, and the vehicle body 10 is equipped with a frame 26 given a rising force in such a way that it is contacted from below to the working table 14 and surrounds the elevating/sinking mechanism 12, and the curtain 24 rolled as willing to be wound is mounted while enwrapped round the frame 26, and the draw-out end of the curtain 24 is detained with the frame 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerial work vehicle with a disaster prevention curtain.

[0002]

2. Description of the Related Art A work platform having a certain floor area is mounted on a base so that it can be raised and lowered by an elevating mechanism, and is used for work at high places, as well as an aerial work vehicle used for raising and lowering equipment and materials. (For example, JP-A-58-636).
No. 97). In such an aerial workbench, there is a risk that a person, an object, or the like may be caught in the lifting mechanism when the workbench is raised. To prevent this, as disclosed in JP-A-3-13500. In some cases, a disaster prevention curtain is stretched between the workbench and the base to surround the lifting mechanism.

[0003]

However, in the above-mentioned prior art, since the workbench directly hangs the disaster prevention curtain, an extra force is applied to the lifting mechanism. or,
It is expected that the workbench will tilt when there is resistance to the lifting of a specific disaster prevention curtain due to an obstacle or the like. Further, since such a disaster prevention curtain is a special material that is flameproofed and is expensive, if it is raised by the same amount as the rising stroke of the workbench, a large amount is required and the cost becomes high. From the standpoint of preventing people or objects from being caught in the telescopic mechanism, it is usual that the rising stroke of the disaster prevention curtain is not required to the rising stroke of the workbench. The present invention solves such a problem and, in short, separates the rise of the disaster prevention curtain from the workbench and stops the rise stroke within a certain range.

[0004]

SUMMARY OF THE INVENTION Under the above problems, the present invention relates to an aerial work vehicle in which a work platform is mounted on a traveling vehicle body so that it can be raised and lowered by an elevating mechanism. It is installed by surrounding the lifting mechanism by applying a frame body to the workbench from below, and the disaster prevention curtain rolled freely is installed around the frame body and the drawer end of the disaster prevention curtain is locked to the frame body. This is a vehicle for aerial work equipped with a disaster prevention curtain.

Further, the present invention provides an aerial work vehicle with a disaster prevention curtain, characterized in that, in the above-mentioned structure, the ascending stroke of the frame is set up to the middle of the ascending stroke of the workbench.

[0006]

By the above means, the frame for the disaster prevention curtain cannot be lifted by the workbench. Therefore,
No load is applied to the lifting mechanism, and even if a bias resistance occurs, it does not affect the posture of the workbench. Furthermore, even if the number of disaster prevention curtains is small, the purpose is achieved.

[0007]

1 is a side view of an aerial work vehicle with a disaster prevention curtain according to the present invention, and FIG. 2 is a rear view of the aerial work vehicle with a disaster prevention curtain according to the present invention. The work table 14 is mounted on the vehicle body 10 so as to be lifted and lowered by a lifting mechanism 12. The vehicle body 10 has wheels 1
It has 6 and has the ability to run by itself. The lifting mechanism 12 is X
Formed by stacking the shaped links 18 in multiple stages,
The hydraulic cylinder 20 installed between 0 and 0 moves up and down. The workbench 14 has an open box body and is equipped with a control box 22.

A workbench 14 is provided around the lifting mechanism 12 described above.
A disaster prevention curtain 24 is attached to follow up and down.
The disaster prevention curtain 24 is provided with a rising force, and the traveling vehicle body 10
It is attached to the frame 26 provided in the. The frame 26 is
Support posts 28 that are set up at the four corners of the traveling vehicle body 10, and support posts 28
Beam 30 that is passed over the top of the
Is given an ascending power.

FIG. 3 is a side sectional view of the support column 28. The support column 28 has a plurality of tubular bodies 28a to 28c in a telescopic structure, and each has a gas spring 32 inside and outside.
It is the one that is attached freely. As a result, a lifting force is always applied to the support column 28, but the beam 30 constituting the upper end of the support column 28 is set so as to hit the work table 14 from below by the pad 31, so that the work table 14 does not rise unless the work table 14 is raised. The extension force due to the expansion of the gas of the gas spring 32 is not exerted (the frame body 26 does not rise). However, workbench 1
When 4 descends, its weight compresses the gas and shortens it. FIG. 4 is a plan sectional view of the support column 28. However, when the support column 28 has such a structure, twisting may occur and smooth movement may be hindered. I passed 34 to prevent this.

The disaster prevention curtain 24 is a rolled curtain that is attached to the traveling vehicle body 10 by a fixture 36, and the upper end of the drawer is locked to the beam 30. In addition, a torque is constantly applied to the fixture 36 so as to wind up the disaster prevention curtain 24. As a result, when the frame body 26 rises,
The disaster prevention curtain 24 is unwound to cover the elevating mechanism 12, and when it goes down, it is wound up on a roll. The disaster prevention curtain 24 is provided between the columns 28 so as to surround the elevating mechanism 12.

By the way, in this case, the gas spring 32
The rising amount of the frame 26, that is, the tension height of the disaster prevention curtain 24 may be set to the middle of the upper stroke of the work table 14 by adjusting the extension amount of the work table 14. Since the disaster prevention curtain 24 mainly prevents people or things near the ground from being caught in the elevating mechanism 12, the amount of the disaster prevention curtain 24 is saved on the premise that it is not necessary to be too high. It is a thing.

[0012]

As described above, according to the present invention, since the disaster prevention curtain is pulled up by the frame body having its own lifting force separately from the workbench, the workbench is not subjected to an excessive lifting force and the obstacle is obstructed. Even if there is bias resistance due to things,
The workbench will not tilt. In addition, by doing so, the rising stroke of the disaster prevention curtain and the workbench can be changed. In this case, if the disaster prevention curtain is raised to a certain height above the ground, rather than the full upstroke of the workbench,
That amount can be saved.

[Brief description of drawings]

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

FIG. 2 is a rear view of an aerial work vehicle showing an embodiment of the present invention.

FIG. 3 is a partial cross-sectional side view of a frame body showing an embodiment of the present invention.

FIG. 3 is a partial cross-sectional plan view of a frame body showing an embodiment of the present invention.

[Explanation of symbols]

 10 Traveling Vehicle 12 Lifting Mechanism 14 Work Table 24 Disaster Prevention Curtain 26 Frame 28 Support Column 28a Cylindrical Body 30 Beam 34 Connection Rod

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[Procedure amendment]

[Submission date] December 22, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

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

FIG. 2 is a rear view of an aerial work vehicle showing an embodiment of the present invention.

FIG. 3 is a partial cross-sectional side view of a frame body showing an embodiment of the present invention.

FIG. 4 is a partial cross-sectional plan view of a frame body showing an embodiment of the present invention.

[Explanation of reference numerals] 10 traveling vehicle body 12 lifting mechanism 14 workbench 24 disaster prevention curtain 26 frame 28 pillars 28a cylinder 30 beam 34 connecting rod

Claims (3)

[Claims] 1. In an aerial work vehicle in which a workbench is mounted on a traveling vehicle body so as to be able to move up and down by an elevating mechanism, a frame body to which a lifting force is applied is applied to the traveling vehicle body from below to move the elevating mechanism. An aerial work vehicle with a disaster curtain characterized in that it is provided so as to surround it, and a disaster prevention curtain rolled freely is installed around the frame body and the drawer end of the disaster prevention curtain is locked to the frame body. 2. The aerial work vehicle with a disaster prevention curtain according to claim 1, wherein the ascending stroke of the frame is set to a midway of the ascending stroke of the workbench. 3. The frame body is composed of a support column having a plurality of cylindrical bodies in a telescopic structure and a beam connecting the upper ends of the support columns, and a twisting prevention connecting rod is passed between the support columns. An aerial work vehicle with a disaster prevention curtain according to claim 1.