JPH05113027A - Elevatable working mobile bogie - Google Patents

Abstract

PURPOSE:To provide an elevatable working mobile bogie which can efficiently carry out several kinds of works at a place higher than the height of a worker by moving a working place without the worker alighting therefrom and by making the height of the working place adjustable. CONSTITUTION:A working bed 21 is incorporated on a mobile bogie 1 through the intermediary of an link type elevating mechanism 17. Two running wheels 2, 3 on the left and right sides of the bogie 1 are driven by two motors 9, 9, respectively, so that the left and right wheels 2, 3 are driven, independent from each other. Casters 14 for floating the wheels from a floor surface are tiltably attached to the bogie 1. With this arrangement, if the driven directions of the left and right wheels are set to be opposite to each other, the bogie can be turned without rectilinear movement, in addition to the forward and rearward movements, with any advancing direction being freely set in a narrow place. Further, even upon a power failure, the bogie may be moved by means of the castors.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile bogie that is suitable for performing various kinds of work at a position higher than the height of a worker.

[0002]

2. Description of the Prior Art For indoor and outdoor finishing work, ceiling work, and other electrical work, use a simple scaffold or use a stepladder or ladder for work at a position higher than the worker's height. I am using.

[0003]

Even with a simple scaffold, it takes a lot of time to carry in / out and assemble / disassemble the members, and with a stepladder or ladder, an operator steps on or off the stepladder or ladder every time the working position changes. In addition, it takes time to move this, and there is a problem in workability.

An object of the present invention is to improve the work efficiency by allowing the worker to move to the work place without getting on and off and to adjust the height.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and is provided with a worktable on a movable carriage via a link-type lifting mechanism, and the movable carriage is provided on both left and right sides of the movable carriage. The gist of the present invention is to provide two motors for independently driving the wheels for left and right independently and to provide the movable carriage with tiltable casters for raising the wheels above the floor.

[0006]

[Operation] Since the work platform is provided on the movable carriage via the link type lifting mechanism, and the left and right wheels of the movable carriage can be independently driven, the movable carriage can move forward and backward in a straight line and move to the left and right. If the driving directions of the wheels are opposite to each other, the carriage turns without moving, whereby the traveling direction can be freely set in a narrow space. In addition, although the workbench is moved up and down and the trolley is moved and changed in direction by electric movement, it can be moved manually using a caster provided on the movable trolley when there is no power source, such as during a power outage or during transportation. Becomes

[0007]

The present invention will be described below with reference to the illustrated embodiments. In the drawing, reference numeral 1 denotes a moving carriage, which is composed of a frame having a required size and strength, and supports wheels 2 and 3 via bearings 4 on the left and right sides of the moving carriage 1 and at the front and rear ends thereof. , Sprocket wheels 5 and 6 are fixed to the axles 2S and 3S of the wheels 2 and 3 respectively in the frame, and chains 7 and 6 are provided between the sprocket wheels 5 and 6 of the front and rear wheels 2 and 3 on the left and right sides. 7
And the front and rear wheels 2 and 3 are driven in synchronization with each other, so that the mobile carriage 1 can be moved.

A sprocket wheel 8 is fixed to either one of the wheels 2 and 3, for example, one end of the axle 3S of the wheel 3, that is, the inner end of the moving carriage, and is installed on the sprocket wheel 8 and the moving carriage 1. Chain 11 between the sprocket wheel 10 of the motor 9 with a reduction gear
And the wheels 3 provided on the outer end side of the axle are driven through the sprocket wheel 10, the chain 11, and the sprocket wheel 8 by the forward and reverse selective drive of the motor 9.

Since the wheels 3 are driven by the motors independently on the left side and the right side of the moving carriage 1, two independent motors 9 and 9 are installed in parallel, and the power transmission mechanism is the same on the left and right. Are provided. As the power transmission mechanism, it is possible to use gears, belts or pulleys instead of the chain and sprocket wheels.

At the front and rear ends of the moving carriage 1 in the traveling direction of the frame, caster stands 13 are movably mounted via hinges 12, and the casters 14, 1 are attached to the caster stand 13.
4 and the operating rod 15 are provided, and the caster table 1 is provided as shown in the drawing.
When 3 is raised, the casters 14 are separated from the floor surface, and when the casters 14 are tilted, the tread surface of the casters 14 is lower than the tread surfaces of the wheels 2 and 3, the casters 14 are in contact with the ground, and the wheels 2 and 3 are located above the floor surface. The caster table is attached to the frame so as to be slightly lifted, and the tilting operation of the caster table 13 is performed by the operating rod 15 provided on the table. The operating rod is provided with a hook-like lock piece 16 that is locked to a part of the frame of the movable carriage so that the caster base does not inadvertently swing when the caster is grounded and the entire movable carriage is lifted. Be done.

A link-type lifting mechanism 17 is provided on the movable carriage 1. One end of the link type lifting mechanism 17 is directly pivotally supported on a bracket 18 protruding from the moving carriage, and the other end is fitted with a guide roller 20 on a guide rail 19 provided on the frame of the moving carriage to form a link type lifting mechanism. When the upper mechanism moves up and down,
This guide roller 20 moves along the guide rail 19, whereby the link type lifting mechanism is bent and extended without moving the center of the link type lifting mechanism 17, and the workbench 21 provided on the upper part can be moved up and down. is there.

Work table 21 through a link-type lifting mechanism 17
The device for moving up and down is to screw a screw rod 22 provided on the moving carriage 1 into a screw body 23 provided in a part of the link-type lifting mechanism 17, and to screw the screw rod 22 into the motor 2
3, forward and reverse are selectively driven through the reducer 24 to move up and down. The lower part of the screw rod 22 is connected to the output shaft of the reducer 24 through the universal joint 25, whereby the screw rod is rotated. The link-type lifting mechanism 17 is bent and stretched by the movement to raise and lower the work table 21.

It is also possible to use a hydraulic cylinder instead of the screw rod to raise and lower the workbench, and further, by the operation of a worker on the workbench, traveling and direction change of the movable carriage 1 and elevating and lowering the workbench. The operation panel 26 is installed so that the above operations can be performed.

When the work-moving lift truck constructed as described above is placed on a truck or the like for transportation or is moved by hand pushing on a desired floor, the wheels 2 and 3 are floated above the floor. Let When the operating rod 15 is tilted, the casters 14 come into contact with the ground and the wheels float. Then, the caster is fixed by hooking the lock piece 16 on a part of the frame, so that the movable carriage 1 has the caster 14,
It can be run by pushing at 14. In this way, when the device is placed on a predetermined floor and the power source is connected, it is possible to electrically move and move the workbench.

When the moving carriage 1 is moved forward or backward, the driving motors for the left and right wheels are simultaneously operated for forward rotation and reverse rotation. To raise and lower the workbench, the screw rod is rotated by rotating the lifting motor in the forward or reverse direction, and the link-type lifting mechanism is bent and extended according to the rotating direction of the rod.

When the movable carriage is turned around, if the driving directions of the left and right wheels are made different from each other, the carriage turns around its center. It is possible to make a left turn and a right turn by changing the driving directions of the wheels that are driven in different directions.

[0017]

According to the present invention, the movable bogie for working has a structure in which the left and right wheels of the movable bogie are independently driven. Therefore, by selecting the forward and reverse rotation directions of the left and right wheel drive motors. You can freely move straight in the front-rear direction and turn left or right, and you can easily turn the direction in a narrow place like a tracked vehicle, and the operator can move the work position up and down on the workbench with the lifting workbench. , Work efficiency can be improved because it can be freely changed in the left and right directions. Further, since casters are tiltably provided on the moving carriage, there is an advantage that the casters can be easily moved when there is no power source or when there is a power failure.

[Brief description of drawings]

FIG. 1 is a plan view of a movable carriage of the present invention excluding a workbench and a link-type lifting mechanism.

FIG. 2 is a front view of a carriage according to the present invention.

FIG. 3 is a front view showing a drive unit.

FIG. 4 is an explanatory diagram of a drive unit of a link-type lifting mechanism.

FIG. 5 is an explanatory diagram of a caster unit.

[Explanation of symbols]

 1 Mobile Cart 2 Wheels 3 Wheels 7 Chain 9 Motor 14 Caster 17 Link Type Uplifting Mechanism 21 Work Table 22 Screw Rod 23 Screw Joint 24 Motor

Claims (1)

[Claims] 1. A work platform is provided on a moving carriage via a link-type lifting mechanism, and two motors for independently driving left and right moving wheels provided on both left and right sides of the moving carriage are provided. At the same time, the movable bogie for work is characterized in that the movable bogie is provided with casters that allow the wheels to float above the floor so that it can be tilted freely.