JPH07276091A - Travel truck - Google Patents

Abstract

PURPOSE:To obtaining a sufficient towing force by a large sucking force in welding operation or cutting operation, and to make the sucking force not in the operation small so as to lighten the load at conveyance time. CONSTITUTION:A magnet 7 is arranged in the main body 1 of the travel truck A which can mount a welding torch or cutting torch and fitted to a bracket 12. A lever 9 is provided outside the main body 1, a shaft 10 is fixed to an end part of the lever 9, and a hinge 11 is fixed to the shaft 10 above the magnet 7. The hinge 11 and bracket 12 are engaged with each other and as the lever 9 rotates, the magnet 7 moves contacting or leaving a bottom plate 1b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling carriage equipped with a welding torch and a cutting torch, and more particularly to a traveling carriage which is light in weight and has improved operability.

[0002]

2. Description of the Related Art Recently, it is general that a welding torch or a cutting torch is mounted on a carriage and the torch is operated as the carriage travels to perform welding work or cutting work. Since such a trolley pulls various hoses and power cords according to the work contents during traveling, it is necessary to exert a sufficient traction force. In addition, it is common to change the work position frequently for welding work and cutting work using a dolly.

There is a contradictory demand for the trolley used for the above work in order to reduce the weight and increase the traction force. That is, in order to increase the traction force, it is necessary to increase the weight of the entire trolley and employ a powerful motor, and in this case, there is a limit to the weight reduction.

For this reason, there has been provided a dolly in which the wheels are composed of magnets or the magnets are provided inside the main body. In such a dolly, the material to be processed is attracted by a magnet to increase the traction force, and at the same time the weight of the dolly is reduced.

[0005]

In a trolley in which the wheels are made of magnets, the wheels are in point contact with the workpiece,
In addition, the surface of the wheel is generally knurled to prevent slippage. Therefore, there is a problem that sufficient traction force cannot be obtained even if the weight of the trolley can be reduced.

Further, in a dolly having a magnet provided inside the main body, a relatively large space (air gap) is created between the attracting surface of the magnet and the material to be processed. Therefore, when the magnet is an electromagnet, the size of the dolly It is difficult to exert sufficient traction force in the space restricted by. Further, when a permanent magnet is used as the magnet, it is possible to exert a sufficient traction force, but when transporting the dolly, a large force is required to separate the dolly from the material to be processed, which imposes a burden on the worker. There is a problem in that it becomes large and iron powder and iron pieces are adsorbed on the bottom surface of the trolley, and the trolley must be cleaned each time it is used.

An object of the present invention is to provide a traveling carriage which can exert a sufficient traction force by a large suction force during work and can reduce the suction force during non-work to reduce the load during transportation. .

[0008]

In order to solve the above problems, a traveling vehicle according to the present invention is a traveling vehicle that carries a welding torch or a cutting torch and is disposed inside a traveling vehicle body. It is configured to have a magnet and moving means for moving the magnet.

[0009] In the above traveling dolly, it is preferable that the moving means moves the magnet in a direction in which the magnet is moved toward and away from the bottom surface of the traveling dolly body.

[0010]

In the above traveling trolley, the magnet is arranged inside the main body and the magnet is moved by the moving means. Therefore, when the moving means is operated to bring the magnet close to the workpiece, , It is possible to reduce the air gap and to exert a large suction force, so that a large traction force can be exerted.

When the moving means is operated to separate the magnet from the material to be processed, the air gap can be increased to exert a small attraction force, and the traveling carriage can be separated from the material to be processed. It can be done easily.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the traveling carriage will be described below with reference to the drawings. FIG. 1 is a front view illustrating the configuration of the traveling vehicle, FIG. 2 is a cross-sectional view illustrating the internal configuration of the traveling vehicle, and FIG.
FIG. 4 is a diagram illustrating a state when the magnet is brought close to the bottom face, and FIG. 4 is a diagram illustrating a state when the magnet is separated from the bottom face.

A traveling carriage A shown in the figure is constructed as a welding carriage on which a welding torch B is mounted and fillets are welded to the workpieces Ca and Cb. However, the traveling carriage according to the present invention can be used as a cutting carriage by mounting a gas cutting torch or a plasma cutting torch instead of the welding torch B. Hereinafter, in the present embodiment, the traveling carriage A will be described as a carriage dedicated to welding.

In the figure, the main body 1 of the traveling carriage A is composed of an upper case 1a and a bottom plate 1b.
A holding portion 2 for holding the welding torch B is provided on the upper part of a. Then, the welding torch B is attached and fixed to the holding portion 2 so that the torch B can be mounted.

Inside the main body 1, a motor 3a and a speed reducer 3 are provided.
The drive device 3 consisting of b is arranged. Further, two shafts 4a and 4b are rotatably arranged inside the main body 1 in the front-rear direction. The shaft 4a is connected to the drive unit 3 through a gear 5a, and the shaft 4b connects the timing belt 5b. It is connected to the shaft 4a through. Wheels 6 made of rubber are fixed to the shafts 4a and 4b, respectively.

Therefore, when the motor 3a is driven, the rotation of the motor 3a is transmitted from the gear 5a to the shaft 4 through the reduction gear 3b.
a is transmitted to the shaft 4b from the timing belt 5b. Then, the four wheels 6 rotate and the main body 1 runs. At this time, since the wheels 6 are each made of rubber, the contact friction with the workpiece Cb is large, and thus a large traction force can be exerted.

Inside the main body 1, a magnet 7 which is movable in the direction away from and in contact with the bottom plate 1b is arranged at substantially the center. As the magnet 7, a permanent magnet made of ferrite magnetic steel is used. The bottom plate 1b is made of a non-magnetic material such as aluminum or stainless steel.

A lever 8 constituting a moving means of the magnet 7 is arranged outside the main body 1. A shaft 9 is fixed to the tip of the lever 8, and a hinge 10 is fixed to a position of the shaft 9 above the magnet 7. The hinge 10 is a magnet 7
The bracket 11 and the magnet 7 are engaged with the bracket 11 attached to the upper part of the bracket, and the bracket 11 and the magnet 7 can be brought into and out of contact with the bottom plate 1b as the hinge 10 rotates.

Therefore, by rotating the lever 8 about the shaft 9 to select the position shown by the solid line and the position shown by the chain double-dashed line in FIG. 1, the magnet 7 corresponds to the position of the lever 8 and the bottom plate 1b.
It is possible to connect and disconnect to.

That is, when the lever 8 is in the position indicated by the solid line,
As shown in FIG. 3, the magnet 7 approaches the bottom plate 1b, and in this state, the air gap between the magnet 7 and the workpiece Cb becomes the minimum value (about 6 mm). When the lever 8 is set to the two-point position, the magnet 7 is separated from the bottom plate 1b and the air gap reaches the maximum value (about 25 mm), as shown in FIG.

In the traveling carriage A according to this embodiment, the torch B is
In the state where the magnet 7 is not mounted, the force required to separate the main body 1 from the work piece Cb when the magnet 7 is closest to the bottom plate 1b is about 19 kg, and when the magnet 7 is most separated from the bottom plate 1b. The force required to pull apart the main body 1 was about 10 kg.

Since the weight of the main body 1 is about 8 kg, the maximum suction force is about 11 kg and the minimum suction force is about 2 kg. That is, by increasing the air gap between the magnet 7 and the workpiece Cb by about 4 times, the attraction force can be reduced to about 1/5.

Therefore, when carrying out the welding work by mounting the torch B on the main body 1, it is possible to exert a sufficient traction force to pull the hoses and the power cable connected to the torch B, and When the traveling carriage A is moved after the work is completed, the lever 7 is rotated to separate the magnet 7 from the bottom plate 1b, so that the main body 1 can be separated from the workpiece Cb with a small force.

The value of the attraction force is a value measured by the traveling vehicle A according to this embodiment and is not limited to this attraction force. That is, the value of the attraction force when the magnet is moved is a value that should be appropriately set according to the size of the traveling carriage, the mounting capacity of the torch, etc. which are set at the design stage.

In the above embodiment, the case where the moving means for moving the magnet 7 is constituted by the lever 8, the shaft 9 and the hinge 10 has been described. However, the moving means in the present invention should not be limited to the above-mentioned structure, for example, a spring is provided between the upper case 1a or the bottom plate 1b and the magnet 7, and the magnet 7 is compressed or pulled to move the magnet 7 to the bottom plate 1b. Alternatively, the magnet 7 may be moved toward or away from the bottom plate 1b by releasing the deformation of the spring. In any case, the purpose of the moving means is the magnet 7
Is to move the bottom plate 1b away from and contact it,
Any configuration may be used as long as it can achieve this purpose.

[0026]

As described in detail above, in the traveling carriage according to the present invention, the attraction force for the work material can be changed by moving the magnet provided inside the main body. Therefore, the attraction force can be increased by bringing the magnet closer to the bottom plate of the main body, and the attraction force can be reduced by separating the magnet from the bottom plate.

Therefore, when the welding work or the cutting work is performed, the suction force can be increased to sufficiently pull the hose and the cable, and when the traveling carriage is relocated, the suction force is decreased to reduce the object to be covered. It can be easily separated from the processed material. Therefore, the welding and cutting can be performed in a stable state, and a great burden is not imposed on the worker when the relocation is performed.

[Brief description of drawings]

FIG. 1 is a front view illustrating the configuration of a traveling vehicle.

FIG. 2 is a cross-sectional view illustrating an internal configuration of a traveling vehicle.

FIG. 3 is a diagram illustrating a state when a magnet is brought close to a bottom surface.

FIG. 4 is a diagram illustrating a state in which a magnet is separated from a bottom surface.

[Explanation of symbols]

A traveling cart B
Welding torch Ca, Cb Work material 1
Body 1a Upper case 1b
Bottom plate 2 Holding part 3
Drive device 4a, 4b Shaft 6
Wheel 7 Magnet 9
Lever 10 axis 11
Hinge 12 bracket

Claims (2)

[Claims] 1. A traveling carriage that carries a welding torch or a cutting torch and travels, comprising: a magnet disposed inside the traveling carriage main body; and a moving means for moving the magnet. Dolly. 2. The traveling vehicle according to claim 1, wherein the moving means moves the magnet in a direction in which the magnet is moved toward and away from the bottom surface of the traveling vehicle main body.