JPH0626189A - Lifting scaffold device - Google Patents

Abstract

PURPOSE:To promote work efficiency by providing a scaffold to a horizontal holder of the top of a pantograph device in a movable manner, and moving it in a horizontal direction with a moving cylinder, if necessary. CONSTITUTION:A pantograph device 11 is extended with the extension of a lift cylinder 12, and a horizontal holder 13 is raised from a position 13a to an upper position. A scaffold 14 is provided to the horizontal holder 13 in one direction at right angles to a rising and falling direction in a slidable manner. In addition, a slide cylinder 18 having a specific stroke is provided between a bracket 17 projected to the lower part of a frame 15 and the horizontal holder 13, and in the case of its extension, the scaffold 14 can be slid up to a position 14a. When work is carried out in a separate place in the horizontal direction, a specific solenoid valve is oprated to extend the work cylinder 18 properly, so that the scaffold 14 is moved to a required position from a storage position, and work efficiency in the horizontal direction can be promoted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevating work scaffolding device for work in high places.

[0002]

2. Description of the Related Art An example of a conventional aerial work vehicle will be described with reference to FIG. 5. The work vehicle A is provided with a boom B which can be swung and raised and lowered.
Is provided.

[0003]

In the work vehicle A described above, the boom B is extended to move the scaffold C to the position C1 as shown in FIG. Work can be performed at any position.

However, in order to perform work at a position separated in the horizontal direction at any one arbitrary position, the boom B is raised and lowered,
Since it is necessary to extend and contract to move the scaffold C, workability is poor.

It is an object of the present invention to provide an elevating work scaffolding device which has improved workability in the horizontal direction when working at height.

[0006]

According to the present invention, a horizontal pedestal provided on the top of a pantograph device, a work scaffold movably provided in a horizontal direction with respect to the horizontal pedestal, and the work scaffold are movable. And a moving cylinder to allow the movement.

As the moving cylinder, it is preferable to use a hydraulic cylinder having a stroke of, for example, 2300 mm.

[0008]

In the lifting work scaffolding device configured as described above, the work is performed at one position at a high place, and when the work is performed at a horizontally separated place, the moving cylinder is extended to move the work scaffold. Work is carried out by moving horizontally to a horizontal mount.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3, reference numeral 1,
The two lifting work scaffolding devices shown in 1A are provided in parallel,
The rod-shaped simultaneous lifting control device 2 and the material loading guide frame 3 are connected to each other, and the respective control panels 4 and 4A are connected by an interlocking connection cable 5.
Since both of these devices 1, 1A have the same configuration,
The device 1 on one side (left side of the drawing) will be described as an example.

A pair of pantograph devices 11 according to a known technique are erected on a mount 10 of the device 1, and the tops of the pantograph devices 11 are connected by a frame-shaped horizontal mount 13. Then, the pantograph device 11 is extended by the extension of the lift cylinder 12, and raises the horizontal mount 13 from the position 13a to the upper position.

A work scaffold 14 is provided on the horizontal mount 13 so as to be slidable in one direction (right in FIG. 3) orthogonal to the ascending / descending direction. Handrails 16 are erected around the slide frame 15 of the work scaffold 14, and
A slide cylinder 18 having a stroke of, for example, 2300 mm, which is a moving cylinder, is interposed between a bracket 17 protruding from the lower portion of the frame 15 and the horizontal frame 13. Therefore, when the slide cylinder 18 extends, the work scaffold 14 is slid to the position 14a in the arrow direction.

FIG. 4 shows a hydraulic circuit diagram of both cylinders 12, 18.

The pump circuit LP of the hydraulic motor 21 driven by the motor 20 is selectively connected to the lift cylinder circuit LL or the slide cylinder circuit LS by the first electromagnetic valve V1. The lift cylinder circuit L
The lift cylinder 1 is connected to L via a fuse valve 22.
2 and 12 are connected in parallel.

On the other hand, the slide cylinder circuit LS has a second
The solenoid valve V2 is selectively connected to the pressure chamber a or b of the slide cylinder 18. In the figure, reference numeral 23 is a pressure gauge, 24 is a relief valve, 25 is a flow regulator valve, 26 is a double pilot check valve, 27 is a pressure switch, 28 is a stop valve, and V3 is a third solenoid valve. Then, the solenoid valves V1 and V
The solenoids V2 and V3 are connected to the operation panel 19 provided on the work scaffold 14 via the control panel 4 by an electric circuit (not shown).

Next, the operation will be described mainly with reference to FIG.

A worker rides on the work scaffold 14 and operates the operation panel 19
Is operated to move the first solenoid valve V1 to the position (1) to connect the pump circuit LP to the lift cylinder circuit LL. Therefore, the lift cylinders 12, 12 extend to raise the work platform 14. Therefore, when the operation panel 19 is operated to be neutral when the control panel 19 is raised to a predetermined position, the first solenoid valve V
1 switches to position (2) and stops rising.

To carry out the work in this state and further work at the right side in FIG. 3, when the operation panel 19 is moved forward, the second solenoid valve V2 is switched to the position (1) and the slide cylinder circuit is operated. LS is the pressure chamber a of the slide cylinder 13.
Connect to. Therefore, the slide cylinder 13 extends to move the work scaffold 14 to the right from the storage position. Therefore,
When the operation panel 19 is neutrally operated after sliding to the predetermined position, the second solenoid valve is switched to the position (N) and the workbench 14
Stop sliding and hold in that position.

When the operation panel 19 is moved backward after the work is completed, the second solenoid valve V2 is switched to the position (2), the slide cylinder circuit LS is connected to the pressure chamber b, and the slide cylinder 13 is contracted to perform the work. Return the scaffold 14 to the storage position. Therefore, the operation panel 19 is neutrally operated to switch the second solenoid valve V2 to the neutral position (2).

Next, when the operation panel 19 is lowered, the third solenoid valve V3 is opened and the lift cylinder circuit LL is switched to the tank circuit LT. Therefore, the working oil in the slide cylinder 12 is returned to the tank T by the weight of the work scaffold 14, the lift cylinders 12 and 12 contract, and the pantograph device 11 contracts to lower the work scaffold 14.

[0021]

Since the present invention is constructed as described above, it is possible to improve the workability in the horizontal direction in the work at height and to shorten the work time.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a top view of FIG.

FIG. 3 is a side view of FIG.

FIG. 4 is a hydraulic circuit diagram.

FIG. 5 is a side view showing an example of a conventional aerial work vehicle.

FIG. 6 is a side view illustrating a movable range of the work scaffold of FIG.

[Explanation of symbols]

 A ... Work vehicle at height B ... Boom C ... Work platform D ... Movable range LL ... Lift cylinder circuit LP ... Pump circuit LS ... Slide cylinder circuit LT ... Tank Circuit V1 ... First solenoid valve V2 ... Second solenoid valve V3 ... Third solenoid valve 1, 1A ... Lifting scaffolding device 2 ... Simultaneous lifting restraining device 3 ... Material loading guide Frames 4 and 4A ... Control panel 5 ... Connection cable for interlocking 10 ... Stand 11 ... Pantograph device 12 ... Lift cylinder 13 ... Horizontal stand 14 ... Working scaffold 15 ... Slide frame 16 ... Handrail 17 ... Bracket 18 ... Slide cylinder 19 ... Operation panel 20 ... Motor 21 ... Hydraulic pump 22 ... Fuse valve 23 ... Pressure gauge 24 ... ·Relief Lube 25 ... flow regulator valve 26 ... double pilot check valve 27 ... pressure switch 28 ... stop valve

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuo Arai 354 Nishinamata, Toyama City, Toyama Prefecture Hokuetsu Aichi Co., Ltd.

Claims (1)

[Claims] 1. A horizontal platform provided on the top of the pantograph device, a work platform provided so as to be movable in the horizontal direction with respect to the horizontal platform, and a moving cylinder for moving the work platform. Lifting work scaffolding equipment to be.