JP2015136708A - Torch for arc processing and arc processing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a torch for arc processing which avoids the occurence of failures.SOLUTION: A torch for arc processing includes: a handle 3 which extends in a first direction X1 and presents a cylindrical shape; a torch head 1 extending from the handle 3; and a torch switch 50, a first failure prevention switch 51, and a second failure prevention switch 52. The handle 3 includes: a holder cylindrical part 35 on which a user grips; and a tip cylindrical part 36 which is positioned closer to the first direction X1 side than the holder cylindrical part 35, the tip cylindrical part 36 from which the torch head 1 extends. The torch switch 50 is located at a position overlapping with the tip cylindrical part 36 in the first direction X1. The first failure prevention switch 51 and the second failure prevention switch 52 are located at positions which overlap with the holder cylindrical part 35 in the first direction X1 and are different from each other in a circumferential direction of the handle 3.

Description

  The present invention relates to an arc processing torch and an arc processing system.

  Conventionally, arc processing for processing a member to be processed using an arc is known. As one of the arc treatments, there is an arc welding method. For example, Patent Literature 1 discloses an arc welding torch used for an arc welding method. The arc welding torch disclosed in this document includes a torch holder and a torch switch. When performing arc welding, the operator turns on the torch switch while holding the torch holder. Thereby, a welding current is supplied to the welding wire inserted through the arc welding torch, and the wire is fed toward the member to be processed.

JP 2010-214455 A

  In conventional arc welding, there is a possibility that foreign matters such as dust may enter the inside of the torch holder. If foreign matter enters the inside of the torch holder, the torch switch may be damaged. Further, when the work is completed, the worker may place the arc welding torch on the floor surface or a work desk. When an arc welding torch is placed on a floor surface or a work desk, the torch switch may come into contact with a projection or the like, thereby causing a problem that the torch switch is turned on.

  The present invention has been conceived under the circumstances described above, and it is a main object of the present invention to provide an arc processing torch capable of avoiding the occurrence of defects.

  According to a first aspect of the present invention, the apparatus includes a handle, a torch head extending from the handle, and a switch accommodated in the handle, wherein the handle includes a shape holding portion and the shape holding portion. An arc processing torch which is connected to and is more flexible than the shape holding portion, and the switch is turned on by receiving a force from the outside of the handle via the easy deformation portion. Is provided.

  Preferably, the number of the switches and the number of the easily deformable parts are each plural, and the plurality of switches include a torch switch and a first malfunction prevention switch, and the plurality of easily deformable parts are for the torch switch. Including a deformable portion and a first easily deformable portion, the torch switch deformable portion can be in contact with the torch switch, and the first easily deformable portion can be in contact with the first malfunction prevention switch. It is.

  Preferably, the plurality of switches include a second malfunction prevention switch, the plurality of easily deformable parts include a second easily deformable part, and the second easily deformable part serves as the second malfunction preventing switch. Abutment is possible.

  Preferably, the handle has a cylindrical shape extending in a first direction, and the handle is positioned closer to the first direction than the gripping cylinder part and a gripping cylinder part for an operator to grip. And the front end cylinder part from which the torch head extends, and the torch switch is located at a position overlapping the front end cylinder part in the first direction, and the first malfunction prevention switch and the second error prevention switch The operation prevention switches are all located at positions overlapping the gripping cylinder in the first direction, and are located at different positions in the circumferential direction of the handle.

  Preferably, the tip tube portion has a protruding portion that protrudes radially outward of the handle relative to the torch switch, and the torch switch is positioned on the first direction side of the protruding portion. Yes.

  Preferably, the plurality of easily deformable portions include at least one additional easily deformable portion, and each easily deformable portion is connected to the shape holding portion and is more flexible than the shape holding portion, and is easily deformable for the torch switch. Each of the portion and the at least one additional easily deformable portion is constituted by the tip tube portion, and is located at different positions in the circumferential direction of the handle.

  Preferably, the handle includes a flexible portion that is connected to the shape holding portion and is more flexible than the shape holding portion, and the shape holding portion includes a first component and a second component separate from the first component. The second component is located on the opposite side of the first component across the torch head in the first direction view, and is disposed on the first component via the flexible portion. It is fixed.

  Preferably, the switch is a seat switch.

  According to the second aspect of the present invention, a cylindrical handle extending in the first direction, a torch head extending from the handle, a torch switch, a first malfunction prevention switch, and a second malfunction prevention switch And the handle includes a gripping cylinder part for an operator to grip, and a tip cylinder part that is positioned on the first direction side of the gripping cylinder part and from which the torch head extends. The torch switch is located at a position overlapping the tip tube portion in the first direction, and the first malfunction prevention switch and the second malfunction prevention switch are both in the first direction. An arc processing torch is provided that is located at a position overlapping the gripping cylinder and is located at different positions in the circumferential direction of the handle.

  Preferably, the tip tube portion has a protruding portion that protrudes radially outward of the handle relative to the torch switch, and the torch switch is positioned on the first direction side of the protruding portion. Yes.

  According to a third aspect of the present invention, the arc processing torch provided by the first aspect or the second aspect of the present invention, and a power source for supplying an arc current to the electrode inserted through the torch head. An arc processing system is provided in which the power source allows the arc current to flow only when any of the plurality of switches is in an ON state.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

It is a figure which shows the arc processing system of 1st Embodiment of this invention. It is a front view which shows the torch for arc processing shown in FIG. It is a rear view which shows the torch for arc processing shown in FIG. It is a fragmentary sectional view which shows a part of arc for torch shown in FIG. 2 as a cross section. It is a partial expanded sectional view which follows the VV line of FIG. It is a circuit diagram of the arc processing system of a 1st embodiment of the present invention. It is a perspective view which shows the torch for arc processing of the 1st modification of 1st Embodiment of this invention. It is a front view which shows the torch for arc processing of 2nd Embodiment of this invention. It is a front view which shows the torch for arc processing of 3rd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

<First Embodiment>
1st Embodiment of this invention is described using FIGS.

  FIG. 1 is a diagram showing an arc processing system according to a first embodiment of the present invention.

  An arc processing system A1 shown in the figure includes an arc processing torch T1 and a power source 5. The arc processing system A1 is for performing arc processing. In this embodiment, the arc processing system A1 is for performing arc welding on the member to be processed W1. The arc processing system A1 uses the electrode 19 to perform arc welding on the member to be processed W1. In the present embodiment, the electrode 19 is a consumable electrode, that is, a wire. The arc processing torch T1 is for guiding the electrode 19 fed from a feeding device (not shown) to the member to be treated W1.

  FIG. 2 is a front view showing the arc processing torch shown in FIG. 3 is a rear view showing the arc processing torch shown in FIG. 4 is a partial cross-sectional view showing a part of the arc processing torch shown in FIG. 2 as a cross-section.

  The arc processing torch T1 shown in FIGS. 2 to 4 includes a torch head 1, a handle 3, and a plurality of switches 500.

  The torch head 1 guides the electrode 19 to a desired location during arc processing of the member to be processed W1. The torch head 1 extends from the handle 3. In the present embodiment, the electrode 19 is inserted into the torch head 1.

  The torch head 1 includes a nozzle 11 and a torch body 12.

  The nozzle 11 is a cylindrical member located at the tip of the arc processing torch T1. In this embodiment, the shield gas supplied from the gas supply device (not shown) is ejected to the workpiece W1 to be welded. Since the nozzle 11 is formed in a cylindrical shape as described above, the shield gas ejected from the nozzle 11 blocks a portion to be welded in the processing target member W1 from the outside air. This prevents welding defects (blowholes) due to nitrogen in the atmosphere melting into the member to be treated. A power feeding chip (not shown) is provided inside the nozzle 11. The power supply tip supplies power to the fed electrode 19 when the arc processing torch T1 is used. Then, the fed electrode 19 is fed toward the member to be processed W1.

  The torch body 12 is a cylindrical member. The torch body 12 extends from the handle 3, and the tip of the torch body 12 is connected to the nozzle 11. The torch body 12 has a bent portion so that the operator can easily point the nozzle 11 toward the processing target member W1.

  The plurality of switches 500 are housed in the handle 3 and are fixed relative to the handle 3. In the present embodiment, the plurality of switches 500 are seat switches and are fixed to the components in the handle 3. Although illustration is omitted, in the sheet switch, for example, two electrode films called an upper electrode sheet and a lower electrode sheet are arranged with a gap in between. By pressing the upper electrode sheet from above, the upper electrode sheet and the lower electrode sheet are brought into contact with each other and are electrically connected. At this time, the seat switch is turned on. On the other hand, when the upper electrode sheet is not pressed, the upper electrode sheet and the lower electrode sheet are separated and insulated from each other. At this time, the seat switch is off. Unlike the present embodiment, the switch 500 is not limited to a seat switch, and may be a push button type push switch or a lever switch, for example.

  The plurality of switches 500 include a torch switch 50, a first malfunction prevention switch 51, and a second malfunction prevention switch 52. The first malfunction prevention switch 51 and the second malfunction prevention switch 52 will be described later.

  The handle 3 has a cylindrical shape extending in the first direction X1. The handle 3 functions as a handle portion when the operator performs arc processing. In order to improve the work efficiency of the arc processing, the handle 3 may have a shape that is easy for a human to grip, for example. In the present embodiment, the electrode 19 is inserted into the handle 3. The handle 3 is made of an insulating material. In the present embodiment, the handle 3 is formed by two-color molding.

  As shown in FIGS. 2 to 4, the handle 3 includes a gripping cylinder part 35 and a tip cylinder part 36.

  The gripping cylinder part 35 is a part for an operator to grip. The distal end cylinder part 36 is located on the first direction X1 side with respect to the gripping cylinder part 35. The torch head 1 extends from the distal end cylindrical portion 36. The tip tube portion 36 has a protruding portion 361. The protruding portion 361 protrudes from the torch switch 50 outward in the radial direction of the handle 3 (in other words, radially outward of the virtual center line extending in the first direction X1 passing through the handle 3).

  The handle 3 includes a shape holding portion 34, a plurality of easily deformable portions 300, and a flexible portion 38. In FIG. 2, the easily deformable portion 300 is shown by hatching.

  The shape holding portion 34 is a portion for holding the shape as the handle 3 and is made of a resin harder than the easily deformable portion 300. The shape holding unit 34 is made of, for example, nylon resin, PET (polyethylene terephthalate), or PBT (polybutylene terephthalate). The shape holding part 34 has a cylindrical shape extending in the first direction X1.

  The plurality of easily deformable portions 300 and the flexible portion 38 are made of the same material. The easily deformable part 300 and the flexible part 38 are more flexible than the shape holding part 34. The easily deformable part 300 and the flexible part 38 are made of, for example, an elastomer (for example, silicone), polyvinyl chloride, or an olefin resin. Each of the plurality of easily deformable parts 300 is connected to the shape holding part 34. Since the handle 3 is formed by two-color molding as described above, the entire periphery of the easily deformable portion 300 is connected to the shape holding portion 34, and a gap is formed between the easily deformable portion 300 and the shape holding portion 34. It has not been. The switch 500 is turned on by receiving a force from the outside of the handle 3 via the easily deformable portion 300. At this time, the easily deformable portion 300 is deformed to the side where the switch 500 is located.

  As shown in FIGS. 2 to 4, the plurality of easily deformable portions 300 include a torch switch easily deformable portion 30, two additional easily deformable portions 30 </ b> A, a first easily deformable portion 31, and a second easily deformable portion 32. And including.

  The torch switch deformable part 30 can abut on the torch switch 50. The torch switch easy-to-deform portion 30 is configured by the above-described distal end tubular portion 36. The torch switch easy-to-deform portion 30 is located on the first direction X1 side with respect to the protruding portion 361. And the protrusion part 361 protrudes in the radial direction outer side of the handle | steering-wheel 3 rather than the deformation | transformation easy part 30 for torch switches.

  As shown in FIGS. 2 and 3, the two additional easily deformable portions 30 </ b> A are configured by the above-described distal end tubular portion 36. The two additional easily deformable portions 30A and the torch switch easily deformable portion 30 are located at different positions in the circumferential direction of the handle 3 (in other words, in the circumferential direction of a virtual center line extending in the first direction X1 passing through the handle 3). Is located. In the present embodiment, no switch is arranged inside the additional easily deformable portion 30A.

  The first easily deformable portion 31 can contact the first malfunction prevention switch 51. The first easily deformable portion 31 is configured by the gripping cylinder portion 35 described above. In the present embodiment, the first easily deformable portion 31 is located above the handle 3 in FIGS.

  The second easily deformable portion 32 can contact the second malfunction prevention switch 52. The second easily deformable portion 32 is configured by the gripping cylinder portion 35 described above. The second easily deformable portion 32 and the first easily deformable portion 31 are located at different positions in the circumferential direction of the handle 3. In the present embodiment, the second easily deformable portion 32 is positioned below the handle 3 in FIGS.

  FIG. 5 is a partially enlarged cross-sectional view taken along the line VV in FIG.

  As shown in FIGS. 2 to 5, the shape holding unit 34 includes a first component 341 and a second component 342 that is a separate component from the first component 341. Although not shown, the first component 341 has a semicircular cross-sectional shape. The first component 341 is integrated with the torch switch deformable portion 30 and the second easily deformable portion 32 described above. On the other hand, the second component 342 is located on the opposite side of the first component 341 with the torch head 1 in between when viewed in the first direction X1. In the present embodiment, the second component 342 has a semicircular cross-sectional shape. The second component 342 is integrated with the additional easily deformable portion 30A and the first easily deformable portion 31 described above. The second component 342 is fixed to the first component 341. In order to fix the second component 342 to the first component 341, for example, a screw (not shown) may be used.

  As shown in FIG. 5, particularly in the present embodiment, the second component 342 is fixed to the first component 341 via the flexible portion 38. The flexible portion 38 is integrated with the first component 341, and a groove 381 is formed. The second component 342 is pressed against the flexible portion 38 in a state where the second component 342 is fitted in the groove 381.

  The handle 3 is manufactured by two-color molding, for example, as follows.

  First, a first mold 341 is formed from a first material using a certain mold. Next, using another mold, the torch switch deformable portion 30, the second easily deformable portion 32, and the flexible portion 38 are formed of the second type of material. In this way, a product in which the first component 341, the torch switch easily deformable portion 30, the second easily deformable portion 32, and the flexible portion 38 are integrated is manufactured. Similarly, the second component 342 is formed from a first material using a certain mold. Next, using another mold, the additional easily deformable portion 30A and the first easily deformable portion 31 are formed of the second type of material. In this manner, a product in which the second component 342, the additional easily deformable portion 30A, and the first easily deformable portion 31 are integrated is manufactured.

  The torch switch 50 shown in FIGS. 2 to 4 and the like is located at a position overlapping the distal end cylindrical portion 36 in the first direction X1. In the present embodiment, the torch switch 50 is surrounded by the distal end cylindrical portion 36. On the other hand, both the first malfunction prevention switch 51 and the second malfunction prevention switch 52 are located at positions where they overlap the gripping cylinder portion 35 in the first direction X1. In the present embodiment, the first malfunction prevention switch 51 and the second malfunction prevention switch 52 are both surrounded by the gripping cylinder portion 35. The first malfunction prevention switch 51 and the second malfunction prevention switch 52 are located at different positions in the circumferential direction of the handle 3. As shown in FIG. 6, in the present embodiment, the torch switch 50, the first malfunction prevention switch 51, and the second malfunction prevention switch 52 are all electrically connected in series.

  The cable 4 (not shown in FIGS. 2 to 5, see FIG. 6) transmits an ON / OFF signal of the switch 500 to the power supply 5.

  The power source 5 shown in FIGS. 1 and 6 applies an arc current to the electrode 19 inserted through the torch head 1. In the present embodiment, when the arc processing system A1 is used, an arc is generated between the electrode 19 and the member to be processed W1. A current flows from the electrode 19 to the member W1 through the arc. As described above, the torch switch 50, the first malfunction prevention switch 51, and the second malfunction prevention switch 52 are all electrically connected in series. Therefore, the power source 5 allows a current to flow through the electrode 19 only when all of the plurality of switches 500 (the torch switch 50, the first malfunction prevention switch 51, and the second malfunction prevention switch 52) are in the on state. In this embodiment, since a consumable electrode is used as the electrode 19, all of the plurality of switches 500 (the torch switch 50, the first malfunction prevention switch 51, and the second malfunction prevention switch 52) are in the on state. The electrode 19 is fed only by a feeding device (not shown).

  Next, the function and effect of this embodiment will be described.

  In the present embodiment, the handle 3 is formed by two-color molding and includes an easily deformable portion 300. The easily deformable portion 300 is connected to the shape holding portion 34 and is more flexible than the shape holding portion 34. The switch 500 is accommodated in the handle 3 and is turned on by receiving a force from the outside of the handle 3 via the easily deformable portion 300. According to such a configuration, since the handle 3 is formed by two-color molding, it is possible to prevent a gap from being formed between the easily deformable portion 300 and the shape holding portion 34. Therefore, foreign matter such as dust can be prevented from entering the handle 3. Thereby, the malfunction which the switch 500 fails can be prevented. In particular, conventionally, the switch 500 is directly touched by an operator's hand, so that foreign matter tends to enter the handle 3. Therefore, the configuration of the present embodiment that can prevent foreign matter from entering the inside of the handle 3 is very useful.

  An operator of an arc processing system may place an arc processing torch on a floor surface or a work desk when the work is completed. When an arc processing torch is placed on the floor or work desk, the conventional arc processing torch turns on the torch switch when the torch switch comes in contact with the projection, etc., and the arc processing system operates. There is a risk that. In such a case, current is passed through the electrode, the electrode is fed, or the shielding gas continues to be ejected from the nozzle. On the other hand, in the present embodiment, the plurality of switches 500 include a torch switch 50 and a first malfunction prevention switch 51. According to such a configuration, the arc processing system A1 does not operate unless both the torch switch 50 and the first malfunction prevention switch 51 are turned on. This can prevent a malfunction (malfunction) that the arc processing system A1 operates when the torch switch 50 is erroneously turned on.

  In the present embodiment, the plurality of switches 500 further includes a second malfunction prevention switch 52. According to such a configuration, the arc processing system A1 does not operate unless the second malfunction prevention switch 52 is turned on in addition to the torch switch 50 and the first malfunction prevention switch 51. Therefore, even if the torch switch 50 and the first malfunction prevention switch 51 are erroneously turned on, it is possible to more suitably prevent the malfunction that the arc processing system A1 operates. In the present embodiment, both the first malfunction prevention switch 51 and the second malfunction prevention switch 52 are located at positions where they overlap the gripping cylinder portion 35 in the first direction X1, and the handle 3 Are located at different positions in the circumferential direction. Then, the operator can turn on the first malfunction prevention switch 51 and the second malfunction prevention switch 52 at a time by grasping the grip cylinder portion 35 with one hand. In the present embodiment, the torch switch 50 is located at a position that overlaps the distal end tubular portion 36 in the first direction X1. For this reason, the torch switch 50 is turned on by, for example, the operator's index finger while the first malfunction prevention switch 51 and the second malfunction prevention switch 52 are turned on by the operator gripping the gripping cylinder portion 35. Can do. According to the above configuration, not only the malfunction of the arc processing system A1 can be substantially avoided, but also a troublesome operation such as the release of another prevention device by the operator becomes unnecessary. Therefore, the arc processing torch T1 of the present embodiment is very workable for the operator of the arc processing system A1.

  In the present embodiment, the distal end cylindrical portion 36 has a protruding portion 361 that protrudes outward in the radial direction of the handle 3 from the torch switch 50. According to such a configuration, it is possible to prevent the torch switch 50 from coming into contact with a projection or the like when the arc processing torch T1 is placed on a floor surface or a work desk. As a result, the problem that the torch switch 50 is erroneously turned on can be further avoided.

  In the present embodiment, the handle 3 includes an additional easily deformable portion 30A. The torch switch easily deformable portion 30 and the additional easily deformable portion 30 </ b> A are both configured by the tip tube portion 36, and are located at different positions in the circumferential direction of the handle 3. According to such a configuration, the position of the torch switch 50 can be changed from the inside of the torch switch easily deformable portion 30 to the inside of the additional easily deformable portion 30A without changing the design of the handle 3. .

  In the present embodiment, as shown in FIG. 5, the second component 342 is fixed to the first component 341 via the flexible portion 38. According to such a configuration, it is possible to prevent foreign matter from entering the handle 3 through the space between the first component 341 and the second component 342.

  When the first malfunction prevention switch 51 and the second malfunction prevention switch 52 are seat switches, the first malfunction prevention switch 51 and the second malfunction prevention switch 52 are turned on when the gripping cylinder portion 35 is gripped. Suitable for condition.

<First Modification of First Embodiment>
A first modification of the first embodiment of the present invention will be described with reference to FIG.

  In the following description, the same or similar components as those described above will be denoted by the same reference numerals as those described above, and description thereof will be omitted as appropriate.

  FIG. 7 is a perspective view showing an arc processing torch according to a first modification of the first embodiment of the present invention.

  The configuration of the present modification is different from the arc processing torch T1 of the above-described embodiment in the following points.

  In this modification, the positions of the first easily deformable part 31 and the second easily deformable part 32 and the positions of the first malfunction preventing switch 51 and the second malfunction preventing switch 52 are shown in FIGS. It is different. In the present modification, both the first easily deformable portion 31 and the second easily deformable portion 32 are integrated with the second component 342 and are located on the upper portion of the handle 3. The first easily deformable portion 31 is located on the near side of FIG. 7 and the second easily deformable portion 32 is located on the far side of FIG. Also in this modified example, the first malfunction prevention switch 51 is disposed inside the first easily deformable part 31, and the second malfunction prevention switch 52 is disposed inside the second easily deformable part 32. Yes.

  Even with such a configuration, it is possible to achieve the same operational effects as those described for the arc processing torch T1.

Second Embodiment
A second embodiment of the present invention will be described with reference to FIG.

  FIG. 8 is a front view showing an arc processing torch according to a second embodiment of the present invention.

  The arc processing torch T2 of the present embodiment differs from the arc processing torch T1 described above in that the switch 500 includes only the torch switch 50 and the easily deformable portion 300 includes only the easily deformable portion 30 for torch switch. Is different. That is, in the arc processing torch T2, the switch 500 does not include the first malfunction prevention switch 51 and the second malfunction prevention switch 52 in the arc treatment torch T1. Further, the easily deformable portion 300 does not include the additional easily deformable portion 30A, the first easily deformable portion 31, and the second easily deformable portion 32. Other points are the same as those of the arc processing torch T1.

  Next, the function and effect of this embodiment will be described.

  Also in the present embodiment, the handle 3 includes the easily deformable portion 300. The easily deformable portion 300 is connected to the shape holding portion 34 and is more flexible than the shape holding portion 34. The switch 500 is accommodated in the handle 3 and is turned on by receiving a force from the outside of the handle 3 via the easily deformable portion 300. According to such a configuration, foreign matter can be prevented from entering the handle 3 for the same reason as described for the arc processing torch T1. Thereby, the malfunction which the switch 500 fails can be prevented.

  In the present embodiment, the distal end cylindrical portion 36 has a protruding portion 361 that protrudes outward in the radial direction of the handle 3 from the torch switch 50. According to such a configuration, when the arc processing torch T2 is placed on a floor surface or a work desk, the torch switch 50 is brought into contact with a projection or the like, as described with respect to the arc processing torch T1. Can be prevented. As a result, it is possible to avoid a problem that the torch switch 50 is erroneously turned on.

  In the present embodiment, the second component 342 is fixed to the first component 341 via the flexible portion 38. According to such a configuration, it is possible to prevent foreign matter from entering the handle 3 through the space between the first component 341 and the second component 342.

<Third Embodiment>
A third embodiment of the present invention will be described with reference to FIG.

  FIG. 9 is a front view showing an arc processing torch according to a third embodiment of the present invention.

  The arc processing torch T3 of the present embodiment is different from the arc processing torch T1 in the following points.

  In the arc processing torch T3, the handle 3 is not formed by two-color molding and is made of a single resin material. Of the plurality of switches 500, the torch switch 50 is a lever switch, and among the switches 500, the first malfunction prevention switch 51 and the second malfunction prevention switch 52 are push button push switches. The plurality of switches 500 are all exposed from the handle 3.

  Also in the present embodiment, the torch switch 50 is located at a position that overlaps the distal end tubular portion 36 in the first direction X1. On the other hand, both the first malfunction prevention switch 51 and the second malfunction prevention switch 52 are located at positions where they overlap the gripping cylinder portion 35 in the first direction X1. The first malfunction prevention switch 51 and the second malfunction prevention switch 52 are located at different positions in the circumferential direction of the handle 3. The torch switch 50, the first malfunction prevention switch 51, and the second malfunction prevention switch 52 are all electrically connected in series.

  Next, the function and effect of this embodiment will be described.

  In the present embodiment, the plurality of switches 500 include a torch switch 50 and a first malfunction prevention switch 51. According to such a configuration, it is possible to prevent the arc processing system A1 from operating when the torch switch 50 is erroneously turned on for the same reason as described for the arc processing torch T1.

  In the present embodiment, the plurality of switches 500 further includes a second malfunction prevention switch 52. The first malfunction prevention switch 51 and the second malfunction prevention switch 52 are both located at positions where they overlap the gripping cylinder portion 35 in the first direction X1, and are different positions in the circumferential direction of the handle 3. Is located. The arc processing torch T3 having such a configuration is very workable for the operator of the arc processing system A1 for the same reason as described for the arc processing torch T1.

  In the present embodiment, the distal end cylindrical portion 36 has a protruding portion 361 that protrudes outward in the radial direction of the handle 3 from the torch switch 50. According to such a configuration, it is possible to avoid a problem that the torch switch 50 is erroneously turned on for the same reason as described for the arc processing torch T1.

  The present invention is not limited to the embodiment described above. The specific configuration of each part of the present invention can be changed in various ways.

  In the above description, the example in which the electrode 19 is a consumable electrode is shown, but the present invention is not limited to this. For example, the electrode 19 may be a non-consumable electrode.

  In the first embodiment, an example in which the plurality of easily deformable portions 300 includes two additional easily deformable portions 30A has been described, but the present invention is not limited to this. For example, the number of the additional deformable parts 30A may be 1 or 3 or more.

  In the above description, an example in which the arc processing is arc welding has been shown, but the present invention is not limited to this. For example, the arc treatment may be fusing or thermal spraying.

  In the above description, an example in which the handle 3 has the flexible portion 38 has been shown, but the present invention is not limited to this, and the handle 3 may not have the flexible portion 38.

  In the above description, the example in which the handle 3 is made of two kinds of materials and is formed by two-color molding is shown, but the present invention is not limited to this. That is, the handle 3 may be made of three or more kinds of materials. The handle 3 may have any color, and the number of color types is not limited.

DESCRIPTION OF SYMBOLS 1 Torch head 11 Nozzle 12 Torch body 19 Electrode 3 Handle 300 Deformable part 30 Deformable part 30A for torch switch Additional easy part 31 First easy part 32 Second easy part 34 Shape holding part 341 First part 342 First 2 parts 35 gripping cylinder part 36 tip cylinder part 361 projecting part 38 flexible part 381 groove 4 cable 5 power supply 500 switch 50 torch switch 51 first malfunction prevention switch 52 second malfunction prevention switch A1 arc processing system T1, T2, T3 arc processing torch W1 treated member X1 first direction

Claims (3)

A cylindrical handle extending in the first direction;
A torch head extending from the handle;
A torch switch, a first malfunction prevention switch, and a second malfunction prevention switch,
The handle includes a gripping cylinder part for an operator to grip, and a tip cylinder part that is located on the first direction side of the gripping cylinder part and from which the torch head extends,
The torch switch is located at a position overlapping the tip tube portion in the first direction;
Each of the first malfunction prevention switch and the second malfunction prevention switch is located at a position overlapping the gripping cylinder in the first direction, and at a position different from each other in the circumferential direction of the handle. A torch for arc processing. The tip tube portion has a protruding portion that protrudes radially outward of the handle from the torch switch,
2. The arc processing torch according to claim 1, wherein the torch switch is located closer to the first direction than the protruding portion. An arc processing torch according to claim 1 or 2,
A power source for supplying an arc current to the electrode inserted through the torch head,
The arc processing system in which the power source allows the arc current to flow only when all of the plurality of switches are in an on state.

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