JPH06191796A - High lift work vehicle - Google Patents

Abstract

PURPOSE:To efficiently mount a weight object on an elevated spot of a ceiling or the like by liftably mounting a work bench of a running carriage by a lift mechanism, and setting up an electrically-driven crane on this work bench, so that the long scaled weight object can be stably lifted. CONSTITUTION:A work bench 2, mounting a handrail 4 on the periphery, is liftably mounted on a running carriage 1 by a lift mechanism 3, to set up a crane 5 on this work bench 2. In this crane 5, a turning unit 7 is mounted turnably by manual operation on an upper part of a strut 6, and a fixed boom 9 of a telescopic boom 8 is supported vertically swingably by manual operation on this turning unit 7. A movable boom 10 of the telescopic boom 8 is formed so as to extend/contract by manual operation, and by a pulley 11 rotatably supported on a point end part of the movable boom 10, a rope 12 for hanging down a weight object is hung down, to wind and deliver this rope 12 by actuating an electric motor driven winch 13 provided in the fixed boom 9. Power is fed to the electric motor driven winch 13 through a wire 17 from a battery 20.

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 used when installing heavy objects such as ducts, pipes and air conditioners at a high place such as a ceiling at a building construction site.

[0002]

2. Description of the Related Art As an aerial worker, it is known that a workbench is mounted on a traveling carriage so that the workbench can be moved up and down, and the worker rides on the workbench to perform aerial work.

[0003]

Such an aerial work vehicle has only the function of a scaffold that can be moved and moved up and down, and does not have other functions. For this reason, when installing a heavy object such as an air conditioner at a high place such as a ceiling at a building construction site, a machine for transporting the heavy object to below the installation site and a machine for lifting the heavy object to the high place are required. Not only is the equipment cost very expensive, but since two machines are placed outside the aerial work vehicle in a small building construction site, the space for arranging them is small and the work efficiency becomes poor.

Therefore, an object of the present invention is to provide an aerial work vehicle capable of solving the above-mentioned problems.

[0005]

[Means for Solving the Problems] A workbench 2 is mounted on a traveling carriage 1 so as to be lifted and lowered by a lift mechanism 3, an electric crane 5 is installed on the workbench 2, and a wiring 17 connected to the crane 5 is lifted. Battery 20 of traveling vehicle 1 via mechanism 3
Aerial work vehicle connected to the side. The traveling carriage 1 is provided with an outrigger 22 and an outrigger extension detection switch 23, and the workbench 2 is provided with a crane installation detection switch 21. When each of these switches is ON, the wiring 17 and the battery 20 side are connected to detect the crane installation. Switch 21 is ON
And either outrigger overhang detection switch 23
An aerial work vehicle in which the wiring 17 and the battery 20 side are discontinuous when FF is set and a warning is issued. A plurality of aerial work vehicles in which a workbench 2 is attached to a traveling carriage 1 so as to be lifted and lowered by a lift mechanism 3 are connected, and a lifter 46 is attached to the workbench 2 of each of the aerial work vehicles to perform at least one aerial work. An aerial work vehicle with a crane 5 installed on the workbench 2 of the car.

[0006]

[Operation] An operator on the workbench 2 can transport a heavy object to the bottom of the place by the crane 5 and can lift the heavy object to a high place. It is possible to efficiently install a heavy object at a high place, and since the battery 20 is used as the power source for the crane in the traveling carriage 1, it is not necessary to travel while paying attention to the power cable when moving the traveling carriage. When the outrigger 21 is not extended, the crane 5 cannot be operated and a warning is issued. Therefore, it is possible to prevent the traveling cart from falling due to the crane work without overhanging the outrigger 21. A long heavy object is lifted by the crane 5 and placed on the lifter 46 provided on the workbench 2 of a plurality of aerial work vehicles, and each workbench 2 is lifted in synchronization to obtain a long heavy object. Since it can be stably lifted, the long heavy object can be efficiently attached to a high place such as a ceiling.

[0007]

[Examples] As shown in FIG. 1, a work platform 2 is provided on a traveling carriage 1 so as to be lifted and lowered by a lift mechanism 3.
A handrail 4 is attached to the periphery of and a crane 5 is installed. The crane 5 has a revolving structure 7 on the upper part of the pillar 6.
Is rotatably attached by manual operation, and the fixed boom 9 of the telescopic boom 8 is supported on the revolving structure 7 so as to be vertically swingable by manual operation, and the movable boom 10 of the telescopic boom 8 can be extended and retracted by manual operation. A rope 12 is suspended via a pulley 11, and the rope 12 is wound around an electric winch 13 provided on the fixed boom 9.

A wiring 14 for supplying electric power to the electric winch 13 is connected to an outlet 16 provided on the workbench 2 via a plug 15, and the wiring 1 connected to the outlet 16 is connected.
Reference numeral 7 is connected to a charger 19 having a DC-AC inverter function, which is provided along the extension link 18 that constitutes the lift mechanism 3 and is provided on the traveling carriage 1. The charger 19 can be connected to the battery 20 to charge the battery 20 with a commercial power supply of AC100V, but further, the power of the battery is converted to AC100V by the inverter function, and the AC1
A power source of 00V can be supplied to the electric winch 13 of the crane 5, and the wiring 17 arranged on the telescopic link 18 can be thin, which simplifies the work of arranging the plug 1.
5 and the outlet 16 can use the thing for AC100V. Further, it is omitted when the battery power source is directly connected to the DC power source. In FIG. 1, a crane installation detection switch 21 is provided on the workbench 2, and this switch is installed on the crane 5
Turns on when is installed and turns off when removed.

As shown in FIG. 2, an outrigger 22 is detachably attached to the traveling carriage 1, and an outrigger extension detection switch 23 is provided which is turned on when the outrigger is properly extended. The crane installation detection switch 21 is connected to a microcomputer 24 as shown in FIG.

As shown in FIG. 3, the microcomputer 24 energizes the coil 26 of the crane relay 25 to energize the coil 26 of the crane relay 25 when the crane installation detection switch 21 and the plurality of outrigger extension detection switches 23 are ON. Piece 2
Turn on 7, 28 to connect the charger 19 to the outlet 16. Thereby, the crane 5 can be operated. Further, the microcomputer 24 has the crane installation detection switch 21 turned off.
One of the outrigger overhang detection switches 23 with N
When one is off, the coil 30 of the buzzer relay 29,
Energize the relay 32 of the lamp relay 31 to connect each contact piece 3
At the same time as turning on the buzzer 35 and the lamp 36 by turning on the switches 3, 34, the coil 26 of the crane relay 25 is stopped and the first and second contact pieces 27, 28 are turned off so that the outlet 16 is not energized. So that the crane 5 cannot be operated. As a result, it is possible to prevent the crane 5 from operating without the outriggers 22 projecting, which is safe.

Next, a second embodiment of the present invention will be described with reference to FIGS. The pair of traveling carriages 1 is connected to the lower connecting member 40.
And the workbench 2 attached to the traveling carriage 1 so as to be able to move up and down by the lift mechanism 3 is connected by the upper connecting member 41.
The upper connecting member 41 is composed of a floor material 42 and a handrail 43 so that an operator can walk between the adjacent worktables 2.

A telescopic link 44 is attached to a substantially central portion of the plane of each workbench 2, and a table 45 is attached to each telescopic link 44 to form a lifter 46. To the above-mentioned crane 5
Is mounted so that it can rotate freely.

Next, the work will be described. A long heavy object A such as a pipe is placed on the floor, the long heavy object A is hung on the wire and the rope 12 is connected, and the crane 5 lifts it up from the lifter 46 as shown in FIG. Is turned to move the long name heavy object A onto the table of the pair of lifters 46, and is lowered by the crane 5 to be placed on the table 45 as shown by an imaginary line in FIG.

After that, the pair of work floors 2 are synchronously raised to horizontally lift the long heavy object A, and the long heavy object A is connected to the suspension bolts suspended from the ceiling. At this time, the pair of lifters 46 are slightly moved up and down to adjust the height of the long heavy object A, or only one lifter 46 is moved up and down to make the long heavy object A oblique with respect to the horizontal. You can also

[0015]

EFFECT OF THE INVENTION An operator on the workbench 2 can transport a heavy object to a position below the place where the crane 5 can be placed, and the heavy object can be lifted to a high place. The heavy objects can be efficiently installed in high places. Further, since the battery 20 of the traveling vehicle 1 is used as a power source for the crane, it is not necessary to travel while paying attention to the power cable when moving the traveling vehicle. When the crane 5 is not operated and the warning is issued when the outrigger 21 is not extended, it is possible to prevent the traveling cart from falling over due to the crane work without overhanging the outrigger 21. A long heavy object is lifted by the crane 5 and placed on the lifter 46 provided on the workbench 2 of a plurality of aerial work vehicles, and each workbench 2 is lifted in synchronization to obtain a long heavy object. Since it can be stably lifted, the long heavy object can be efficiently attached to a high place such as a ceiling.

[Brief description of drawings]

FIG. 1 is an overall front view of an aerial work vehicle.

FIG. 2 is a side view of only a traveling carriage of an aerial work vehicle.

FIG. 3 is a power supply circuit diagram for a crane.

FIG. 4 is a front view showing a second embodiment.

FIG. 5 is a plan view of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Traveling vehicle, 2 ... Workbench, 3 ... Lift mechanism, 5 ... Crane, 17 ... Wiring, 20 ... Battery, 21 ... Crane installation detection switch, 22 ... Outrigger, 23 ... Outrigger overhang detection switch, 24 ... Microcomputer.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukio Moritani 3-20-1 Nakase, Kawasaki-ku, Kawasaki-shi, Kanagawa Komatsu Ltd. Kawasaki Plant

Claims (4)

[Claims] 1. A work platform 2 of a traveling carriage 1 is movably mounted by a lift mechanism 3, and an electric crane 5 is mounted on the work platform 2.
And the wiring 17 connected to the crane 5 is connected to the battery 20 side of the traveling carriage 1 via the lift mechanism 3 and an aerial work vehicle. 2. The work platform 2 is provided with an outrigger 22 and an outrigger overhang detection switch 23.
A crane installation detection switch 21 is provided in the above, and when the respective switches are ON, the wiring 17 and the battery 20 side are connected. When the crane installation detection switch 21 is ON and any outrigger extension detection switch 23 is OFF, the wiring 17 is connected. The aerial work vehicle according to claim 1, wherein the battery 20 side is discontinuous and a warning is issued. 3. A plurality of aerial work vehicles in which a work platform 2 is attached to a traveling carriage 1 by a lift mechanism 3 so as to be vertically movable are connected, and lifters 46 of the work platforms 2 of the respective aerial work vehicles are attached, respectively.
An aerial work vehicle in which a crane 5 is installed on a workbench 2 of at least one aerial work vehicle. 4. An aerial work vehicle according to claim 3, wherein the crane 5 is mounted so as to be rotatable.