JP2007296578A - Traveling truck for working - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a traveling truck for working which is excellent in work stability during the work, and easily attachable/detachable to/from a work steel to be worked. <P>SOLUTION: The traveling truck travels on a surface of a work formed of a magnetic material. A permanent magnet 13 is fixed in a truck body 1 of the traveling truck with a welding torch 2 or a cutting torch mounted therein in a deviated manner in the direction orthogonal to the moving direction of the traveling truck, and a steering wheel 15 arranged in the traveling truck is arranged close to one side in the direction opposite to the deviating direction of the permanent magnet 13 on an upper part of the traveling truck. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a traveling carriage that is mounted on a welding torch or cutting torch and travels on the surface of a workpiece made of magnetic material.

  2. Description of the Related Art In recent years, a welding torch or a cutting torch is mounted on a work cart, and welding or cutting work is performed by operating the torch while the cart is running. This type of truck moves while pulling the power cord and various hoses when traveling, so it requires a sufficient traction force, while welding and cutting work must frequently change the work position. For this reason, it must be easy to carry.

  Therefore, a magnet is arranged inside the carriage so that it can be attached to and detached from the bottom surface of the traveling carriage, so that the adsorption force to the workpiece (magnetic material workpiece) can be changed, and the magnet is brought closer to the bottom side during work. Thus, there has been proposed (Patent Document 1) in which a large traction force can be obtained by applying a large adsorption force to a workpiece.

  However, since equipment that uses magnetic materials, such as electric motors and transformers for driving, are accommodated in the cart, the magnets accommodated in the cart are moved up and down to attract the workpiece. In the case where the magnitude of the force is changed, the magnetic lines of force from the magnet disturb the magnetic lines of force in equipment such as an electric motor or a transformer and change its output, which affects the running performance and welding current. There was a problem of affecting.

Therefore, the applicant first arranges the magnet inside the carriage in a posture facing the surface of the workpiece, and arranges the shutter plate between the magnet and the surface of the workpiece so as to be able to move in and out. A shutter plate is positioned between the magnet and the surface of the work piece to reduce the attractive force of the magnet (Patent Document 2).
Japanese Patent No. 25896570 Japanese Patent Laid-Open No. 2004-141884

  However, in the case of reducing the magnet's attracting force by moving the shatter plate between the magnet and the workpiece proposed earlier, a part of the dust generated by the work adheres to the sliding region of the shatter plate. It has been found that the smooth movement of the shirter may be hindered.

  An object of the present invention is to provide a work carriage that is excellent in work stability during work and that can be easily attached to and detached from a work material by paying attention to such points.

  In order to achieve the above-mentioned object, the present invention according to claim 1 is directed to a direction in which a permanent magnet is perpendicular to the moving direction of the traveling carriage inside the carriage main body of the traveling carriage on which the welding torch or the cutting torch is mounted. It is characterized in that the handle disposed on the traveling carriage is shifted to the upper side of the traveling carriage and shifted in the direction opposite to the eccentric direction of the permanent magnet.

  Further, the invention described in claim 2 is characterized in that the traveling wheel on the side where the permanent magnet is disposed is provided with a deformation suppressing function. Here, the deformation suppression function means that when the wheel itself is made of an inelastic material, or the wheel itself is made of an elastic material, it is reinforced with a rigid material such as a metal plate to make it difficult to deform. Say.

  In the present invention, the permanent magnet arranged in the main body of the carriage is eccentrically arranged in either direction perpendicular to the moving direction of the traveling carriage and fixedly arranged, and the handle arranged on the traveling carriage is arranged at the upper part of the traveling carriage. Since the permanent magnet is arranged in a direction opposite to the eccentric direction of the permanent magnet, when it is lifted with the handle, the magnet side wheel is used as a fulcrum, and it is in a state of peeling off against the attractive force of the magnet. . In this case, since the length of the moment arm from the fulcrum position to the handle portion is longer than the length of the moment arm from the fulcrum position to the magnet, the traveling carriage can be detached from the workpiece with a light force.

  In addition, when the traveling wheel on which the permanent magnet is disposed has a deformation suppressing function, the traveling wheel on the side on which the permanent magnet is disposed is stable when the traveling carriage is lifted with a handle. Therefore, the traveling carriage can be more reliably detached from the workpiece.

1 shows an embodiment of the present invention, FIG. 1 is an overall perspective view of a working carriage, FIG. 2 is a schematic perspective view of a carriage main body, FIG. 3 is a front view thereof, FIG. 4 is a plan view thereof, and FIG. Is a side view thereof.
In this working traveling carriage, the supporting device (3) of the welding torch (2) and the control box (4) are arranged on the upper surface of the carriage main body (1) in the front and rear direction in the traveling direction of the carriage.

  Inside the cart body (1), there is a traveling electric motor (5), a traveling drive mechanism (8) composed of a speed reducer (6) and a bevel gear (7), and a pair of front and rear rotating shafts (9) ( 9), traveling wheels (10) and (10) mounted and fixed on the respective rotating shafts (9) and (9), and an endless chain (11) attached between the front and rear rotating shafts (9) and (9). ing.

  On the bottom wall (12) in the cart body (1), a permanent magnet (13) made of ferritic magnetic steel is disposed between the front and rear rotating shafts (9, 9). The permanent magnet (13) is fixedly arranged eccentrically on the side opposite to the protruding direction of the welding torch (2) with the traveling direction of the carriage as the front-rear axis. The bottom wall (12) of the cart body (1) is formed of a nonmagnetic material such as an aluminum plate or a stainless steel plate. Further, when a magnet having excellent heat resistance such as a samarium cobalt magnet is used as the permanent magnet (13), adverse effects due to heating during welding are reduced.

  In the upper part of the working carriage, a handle (15) is installed between the upper part of the front side wall surface of the control box (4) and the support stay (14) erected from the front end face of the carriage body (1). It is. The handle (15) is located on the welding site side of the working carriage, that is, on the opposite end of the carriage body (1) from the side where the permanent magnet (13) is disposed. Further, the handle (15) may be attached in a state of projecting toward the welding point as shown in FIGS.

  In the working carriage configured as described above, the welding torch (2) is in a posture corresponding to a welded portion formed between a magnetic material workpiece (not shown) such as a steel plate and a joining member, and The magnetic material workpiece and the joining member are placed on the magnetic material workpiece, and the welding electric motor (5) is operated and the control box (4) is operated to weld the welding portion while traveling. To weld.

  At this time, since the permanent magnet (13) is arranged on the bottom wall (12) of the cart body (1), the entire cart is pressed against the magnetic material workpiece side by the attractive force of the magnet (13). Therefore, the contact friction between the traveling wheel (10) and the magnetic workpiece is increased, and a large traction force can be exhibited.

  In the working traveling carriage having the above-described configuration, the location where the permanent magnet (13) is disposed and the location where the handle (15) is disposed are left and right in a plan view when the traveling direction is front and back, and It is supposed to be spaced apart in the vertical direction. For this reason, when changing to a different workpiece, the working carriage is lifted against the attracting force of the permanent magnet (13). Acting by using the traveling wheel (10) on the permanent magnet arrangement side on which the attracting force of the magnet (13) acts more strongly as a fulcrum, the handle (15) as a force point, and the permanent magnet (13) as an action point As a result, the moment arm to the handle becomes longer than the moment arm to the permanent magnet (13), so it is possible to lift the work carriage with a light force against the attracting force of the permanent magnet (13). it can.

  Thus, since the traveling wheel (10) acts as a fulcrum when the working traveling carriage is removed, the traveling wheel (10) may be formed of an iron wheel as shown in FIG. The elastic deformation of the wheel is prevented by integrally arranging a metal plate (16) formed slightly smaller than the outer diameter of the wheel on the side part located at least outside the rubber or synthetic resin wheel as shown in It is desirable to be able to suppress it.

  In the above embodiment, the case where the handle (15) is disposed on the welding location side in the work traveling carriage and the permanent magnet (13) is disposed on the side far from the welding operation location has been described. Depending on the case, the permanent magnet (13) may be arranged on the side of the welded part, and the handle (15) may be arranged on the side far from the welded part.

  The present invention can be used not only for a welding cart for welding work but also for a cutting cart for cutting work.

1 is an overall perspective view showing an embodiment of a work traveling carriage according to the present invention. It is a schematic perspective view of a trolley body part. It is the front view. FIG. It is the side view. It is a taking-out perspective view of a traveling wheel. It is a taking-out perspective view of the traveling wheel of a different type.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Carriage body, 2 ... Welding torch, 10 ... Running wheel, 13 ... Permanent magnet, 15 ... Handle, 16 ... Metal plate.

Claims (3)

A working cart that travels on the surface of a workpiece made of magnetic material, and moves the traveling cart with a permanent magnet (13) inside the cart body (1) of the traveling cart equipped with a welding torch (2) or cutting torch. The handle (15) arranged on the traveling carriage is fixed in a direction perpendicular to the direction, and the handle (15) arranged on the traveling carriage is shifted to the upper side of the traveling carriage in the direction opposite to the eccentric direction of the permanent magnet (13). A working traveling cart characterized by the arrangement of The working traveling vehicle according to claim 1, wherein the traveling wheel (10) on the side where the permanent magnet (13) is disposed is provided with a deformation suppressing function. By placing the traveling wheel (10) on the side where the permanent magnet (13) is disposed on the outer surface side of the rubber wheel with a slightly small diameter metal plate (16), the traveling wheel (10) is placed in close contact. The work traveling vehicle according to claim 2, which has a deformation suppressing function.

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