JP6473432B2 - Welding torch maintenance tool - Google Patents

Description

  The present invention relates to a welding torch maintenance tool used for disassembling, assembling or removing spatter adhered to a welding torch provided in a welding apparatus.

  2. Description of the Related Art Conventionally, in a welding torch provided in an automatic welding apparatus for arc welding, parts such as a nozzle for sending a shield gas and a tip for sending a welding wire are detachably attached to the torch body. When arc welding is performed, spatter (fine particles scattered during welding) adheres to the nozzle. The spatter adhering to the nozzle has an adverse effect on the delivery of the shielding gas, and therefore needs to be removed. Removal of spatter adhering to the nozzle is performed by removing the nozzle from the torch body and scraping off the spatter from the nozzle.

  Therefore, the tools described in Patent Document 1 and Patent Document 2 are known as tools used for maintaining the welding torch, such as disassembly of the welding torch, assembly, and removal of spatter attached to the welding torch. In the tool described in Patent Document 1, the pair of metal stays are closed, the tip end side pinch portion is inserted into the nozzle, the hammer portion is brought into contact with the tip end of the nozzle, and the tool is rotated, whereby the nozzle At the same time as scraping off the spatter adhering to the tip of the nozzle, spatter adhering to the inner peripheral surface of the nozzle can also be scraped off. In the tool disclosed in Patent Document 2, the first clip portion is inserted into the nozzle with the pair of metal stays closed, and the bottom surface of the recessed space formed by the second clip portion is used as the tip of the nozzle. By rotating the tool while abutting, the spatter adhering to the tip of the nozzle can be scraped off, and the spatter adhering to the inner peripheral surface of the nozzle can also be scraped off.

Japanese Utility Model Publication No. 5-2302 Utility Model Registration No. 3203080

  However, in the tools described in Patent Documents 1 and 2, for a nozzle having a certain diameter, the spatter adhering to the tip of the nozzle and the sputter adhering to the inner peripheral surface of the nozzle by the simple operation as described above. Can be scraped off at the same time, but it is difficult to deal with when the nozzle diameter is different.

  An object of the present invention is to solve the above-mentioned problems, and to provide a welding torch maintenance tool capable of efficiently removing spatters adhering to nozzles for a plurality of types of nozzles having different diameters. And

  In order to achieve the above object, a welding torch maintenance tool of the present invention is a welding torch maintenance tool in which a pair of metal stays are rotatably supported by intersecting in an X shape around a pivot axis. The metal stay is located on one side with the pivot shaft in between, a pair of grip portions for the user to rotate the metal stay, and on the other end with the pivot shaft in between. A pair of first sandwiching parts sandwiching the object between the opposing inner surfaces of the stays, and facing the both rear surfaces of the pair of metal stays constituting the first sandwiching part toward the pivot shaft side from the tip A plurality of stepped portions whose height from the inner surface is increased stepwise is provided.

  In the welding torch maintenance tool of the present invention, it is preferable that the plurality of stepped portions are provided symmetrically with respect to the opposing inner surface as viewed from the pivot axis direction.

  Further, in the welding torch maintenance tool of the present invention, the metal stay is located between the pivot shaft and the grip portion, and is viewed from the pivot axis direction when the metal stay is rotated around the pivot shaft and closed. It is preferable to further include a second sandwiching portion that forms a flat cylindrical space.

  In the welding torch maintenance tool of the present invention, the metal stay is between the first sandwiching portion and the pivot shaft. When the metal stay is turned around the pivot shaft and closed, the blade edges are connected to each other. It is preferable to further include a cutter blade that meshes with each other and a third sandwiching portion that forms a flat cylindrical space when viewed from the pivot axis direction.

  According to the present invention, even when the nozzle diameter is relatively small or large, by using one of a plurality of step portions provided on both back surfaces of the metal stay, it is possible to perform a simple operation. The spatter adhering to the tip and inner peripheral surface of the nozzle can be scraped off simultaneously, and the working efficiency can be improved.

The perspective view which shows the structure of the welding torch maintenance tool which concerns on one Embodiment of this invention. (A) is a plan view of the tool with the metal stay open, and (b) is a plan view of the tool with the metal stay closed. (A) is a perspective view of a welding torch, (b) is the same sectional view. (A) is a disassembled perspective view of a welding torch, (b) is the same sectional view. The figure explaining the removal method of the nozzle of a welding torch using the tool. The figure explaining the cutting method of the welding wire of the welding torch using the tool. The figure explaining the removal method of the tip of a welding torch using the tool. The figure explaining the removal method of the insulator of the welding torch using the tool. The figure explaining the drawing-out method of the welding wire of the welding torch using the tool. The figure explaining the removal method of the spatter adhering to the nozzle of the welding torch using the 1st clamping part of the tool. (A) is a figure explaining the removal method of the spatter adhering to the small diameter nozzle of the welding torch, (b) is a figure explaining the removal method of the spatter adhering to the large diameter nozzle of the welding torch. (A) is a perspective view of the state which opened the metal stay which shows the modification of the tool, (b) is a perspective view of the state which closed the metal stay which shows the modification of the tool.

  Hereinafter, a welding torch maintenance tool according to an embodiment of the present invention will be described with reference to the drawings. 1 and 2 show the configuration of a welding torch maintenance tool 1 (hereinafter referred to as tool 1), and FIGS. 3A, 3B, 4A, and 4B show the configuration of the welding torch 2. FIG. Indicates. The tool 1 is a tool used for maintaining the welding torch 2, and is a tool used for disassembling the welding torch 2, assembling, removing spatter adhered to the welding torch 2, and the like.

  Here, first, the welding torch 2 will be described with reference to FIGS. 3 and 4. The welding torch 2 is provided in an automatic welding device for arc welding, and includes a torch body 21 held by a robot arm (not shown) of the automatic welding device, a tip body 22 attached to the torch body 21, and a tip. A chip 23 and an insulator (insulating cylinder) 24 that are detachably attached to the body 22 and a nozzle 25 that is detachably attached to the insulator 24 are provided.

  Each of the torch body 21 and the tip body 22 is hollow, and the inside of the tip body 22 communicates with the inside of the torch body 21. A hole 22 a communicating with the inside of the chip body 22 is formed on the side surface of the chip body 22. The tip 23 is hollow and open at both ends, and is attached to the tip body 22 so that the inside of the tip 23 communicates with the inside of the tip body 22. The chip 23 is screwed onto the chip body 22 by a male screw part 23 a of the chip 23 and a female screw part 22 b of the chip body 22. The insulator 24 has a cylindrical shape that is hollow inside and open at both ends, and is attached to the chip body 22 so that a part of the chip body 22 is accommodated inside the insulator 24. The insulator 24 is screwed onto the tip body 22 by a female thread portion 24 a of the insulator 24 and a male thread portion 22 c of the tip body 22. The nozzle 25 has a cylindrical shape that is hollow inside and open at both ends, and is attached to the insulator 24 so that a part of the tip body 22 and the tip 23 are accommodated inside the nozzle 25. The nozzle 25 is screwed onto the insulator 24 by a female screw portion 25 a of the nozzle 25 and a male screw portion 24 b of the insulator 24.

  The torch body 21 is connected to a welding wire supply unit (not shown) of the automatic welding apparatus, and the welding wire 26 is supplied from the welding wire supply unit. The welding wire 26 is led out from the tip of the tip 23 (also the tip of the nozzle 25) through the inside of the torch body 21, tip body 22, and tip 23. The torch body 21 is connected to a shield gas supply unit (not shown) of the automatic welding apparatus, and shield gas is supplied from the shield gas supply unit. The shield gas passes through the inside of the torch body 21 and the tip body 22, is ejected from the hole 22 a of the tip body 22, passes through the inside of the nozzle 25, and is sent from the tip of the nozzle 25.

  Next, the tool 1 is demonstrated with reference to FIG.1 and FIG.2. The tool 1 includes a pair of metal stays 10 and a pivot shaft 11 that rotatably supports the metal stays 10. The metal stays 10 cross each other at the position of the pivot shaft 11. That is, the tool 1 is supported by a pair of metal stays 10 that are pivotable so as to intersect in an X shape around the pivot shaft 11. The pair of metal stays 10 are on one side with the pivot shaft 11 in between, and a pair of grip portions 12 for the user to rotate the metal stay 10 and on the other end with the pivot shaft 11 in between. A pair of first sandwiching portions 13 sandwiching the object, and two (a plurality of) step portions 14 on both rear surfaces of the pair of metal stays 10 constituting the first sandwiching portion 13. , 15 are provided. The pair of metal stays 10 are located between the pivot shaft 11 and the grip portion 12, and are paired with a second sandwiching portion 16 that sandwiches the object, a first sandwiching portion 13, and the pivot shaft 11. A pair of third sandwiching portions 17 that sandwich the object, and a pair of cutter blades that are located between the third sandwiching portion 17 and the pivot shaft 11 to cut the object. 18.

  The tool 1 also includes a spring 19 for holding the pair of metal stays 10 in an open state. The spring 19 is interposed between the pivot shaft 11 and the second sandwiching portion 16 in a compressed state between the pair of metal stays 10. In a natural state where the user does not hold the grip portion 12, the pair of metal stays 10 are held open by the force of the spring 19. When the user grips the grip portion 12, the pair of metal stays 10 is rotated, and the pair of metal stays 10 is rotated around the pivot shaft 11 against the force of the spring 19 and closed.

  The first sandwiching portion 13 has a pair of opposed inner surfaces 13 a that are parallel to and opposed to each other when the pair of metal stays 10 are closed, and an object is placed between the opposed inner surfaces 13 a of the metal stay 10. Used to pinch. Specifically, the first sandwiching portion 13 sandwiches the nozzle 25 in contact with the inner peripheral surface and the outer peripheral surface of the nozzle 25 between the opposed inner surfaces 13a when removing the spatter attached to the inner and outer peripheral surfaces of the nozzle 25. Further, when the welding wire 26 is pulled out, the welding wire 26 is used to be sandwiched between the opposed inner surfaces 13a. The opposed inner surface 13a is a flat surface, and knurls (fine irregularities) are formed on the distal end side of the opposed inner surface 13a. The knurls formed on the opposed inner surface 13a are composed of a number of grooves parallel to the direction of the pivot shaft 11. The knurling plays a role of scraping off the spatter adhering to the inner and outer peripheral surfaces of the nozzle 25, and when pulling out the welding wire 26, the first pinching portion 13 and the welding wire 26 are used. Play a role to prevent slipping between the two. The first sandwiching portion 13 is configured to be inserted into the nozzle 25 in a state where the pair of metal stays 10 are closed. The first sandwiching portion 13 extends straight and elongated, and becomes narrower toward the distal end side.

  The two stepped portions 14 and 15 are provided on both back surfaces of the pair of metal stays 10 constituting the first sandwiching portion 13, and the metal stays become closer to the pivot shaft 11 from the front end of the first sandwiching portion 13. The height from 10 facing inner surfaces 13a is increased stepwise. That is, the stepped portion 14 has a stepped end surface 14a that rises from the tip end back surface 13b and is perpendicular to the opposed inner surface 13a, and a stepped back surface 14b that is parallel to the opposed inner surface 13a. The step portion 15 is located between the step portion 14 and the pivot shaft 11, has a step end surface 15a that rises from the step back surface 14b and is perpendicular to the opposed inner surface 13a, and a step back surface 15b that is parallel to the opposed inner surface 13a. ing. The height from the facing inner surface 13a to the step back surface 14b is higher than the height from the facing inner surface 13a to the tip end back surface 13b, and the height from the facing inner surface 13a to the step back surface 15b is from the facing inner surface 13a to the step height. It is higher than the height up to the back surface 14b. The tip end back surface 13b, the step end surfaces 14a and 15a, and the step back surfaces 14b and 15b are the back surfaces of the metal stay 10, and are each flat.

  The step portion 14 is used so that the step end surface 14a is in contact with the tip of the nozzle 25 when removing the spatter adhering to the tip of the nozzle 25, and when removing the spatter attached to the inner peripheral surface of the nozzle 25. In addition, it is inserted into the nozzle 25 and used so that the step back surface 14 b contacts the inner peripheral surface of the nozzle 25. Further, the step portion 15 is used so that the step end surface 15 a contacts the tip of the nozzle 25 when removing the spatter adhering to the tip of the nozzle 25. The first sandwiching portion 13 is inserted into the nozzle 25 when removing the spatter adhering to the inner peripheral surface of the nozzle 25 so that the back surface 13b of the tip end portion is in contact with the inner peripheral surface of the nozzle 25. used. The step portions 14 and 15 are provided symmetrically with respect to the pivot shaft 11 with the opposed inner surface 13a as a boundary.

  The second sandwiching portion 16 forms a flat cylindrical space 16a when viewed from the direction of the pivot shaft 11 when the metal stay 10 is turned around the pivot shaft 11 and closed. That is, the second sandwiching portion 16 has a pair of curved surfaces 16b that form a flat cylindrical space 16a when viewed from the direction of the pivot shaft 11 when the pair of metal stays 10 are closed. The second sandwiching portion 16 is used so as to sandwich the object between the curved surfaces 16 b of the metal stay 10. Specifically, the second sandwiching portion 16 is used so that the nozzle 25 and the insulator 24 are sandwiched between the curved surfaces 16b when the nozzle 25 and the insulator 24 of the welding torch 2 are attached and detached. A knurling is formed on the curved surface 16 b to prevent slippage between the second sandwiching portion 16 and the nozzle 25 and the insulator 24. This knurl is composed of a number of grooves parallel to the direction of the pivot axis 11.

  The third sandwiching portion 17 forms a flat cylindrical space 17 a when viewed from the direction of the pivot shaft 11 when the metal stay 10 is rotated around the pivot shaft 11 and closed. That is, the third sandwiching portion 17 has a pair of curved surfaces 17b that form a flat cylindrical space 17a when viewed from the direction of the pivot shaft 11 when the pair of metal stays 10 are closed. The third sandwiching portion 17 is used so as to sandwich the object between the curved surfaces 17 b of the metal stay 10. Specifically, the third sandwiching portion 17 is used so that the tip 23 is sandwiched by the curved surface 17b when the tip 23 of the welding torch 2 is attached or detached. On the curved surface 17b, a knurl for preventing slippage between the third sandwiching portion 17 and the chip 23 is formed. This knurl is composed of a number of grooves parallel to the direction of the pivot axis 11. The cutter blades 18 engage with each other when the metal stay 10 is turned around the pivot shaft 11 and closed. The cutter blade 18 is used for cutting an object, and specifically, used for cutting the welding wire 26.

  Next, how to use the tool 1 will be described with reference to FIGS. FIG. 5 shows a method of removing the nozzle 25 of the welding torch 2 using the tool 1. When removing the nozzle 25 from the welding torch 2, the user holds the grip portion 12 of the tool 1 and sandwiches the nozzle 25 with the second sandwiching portion 16. Subsequently, the user squeezes the grip portion 12 and rotates the tool 1 in a direction in which the screwing between the nozzle 25 and the insulator 24 is released. Thereby, the nozzle 25 rotates together with the tool 1, and the nozzle 25 is unscrewed from the insulator 24. Then, the user pulls out the screw 25 released from the tip body 22, the tip 23, and the welding wire 26. Thereby, the nozzle 25 is removed from the welding torch 2. When the nozzle 25 is attached, a process reverse to the above process is performed.

  FIG. 6 shows a method for cutting the welding wire 26 of the welding torch 2 using the tool 1. The cutting of the welding wire 26 is performed, for example, in order to excise a ball drop 26 a formed at the tip of the welding wire 26. At this time, the nozzle 25 may be attached or removed (in the illustrated example, it is removed). When cutting the welding wire 26, the user holds the grip portion 12 and sandwiches the welding wire 26 with the cutter blade 18 of the tool 1. Then, the user squeezes the grip part 12. As a result, the welding wire 26 is cut by the cutter blade 18.

  FIG. 7 shows a method for removing the tip 23 of the welding torch 2 using the tool 1. The tip 23 is removed with the nozzle 25 removed. At this time, the insulator 24 may be attached or removed (attached in the illustrated example). When removing the tip 23 from the welding torch 2, the user holds the grip portion 12 of the tool 1 and sandwiches the tip 23 with the third sandwiching portion 17. Subsequently, the user squeezes the grip part 12 and rotates the tool 1 in a direction in which the screwing between the tip 23 and the tip body 22 is released. As a result, the tip 23 rotates together with the tool 1, and the tip 23 is unscrewed from the tip body 22. Then, the user pulls out the screw 23 released from the welding wire 26. Thereby, the tip 23 is removed from the welding torch 2. When the chip 23 is attached, a process reverse to the above process is performed.

  FIG. 8 shows a method of removing the insulator 24 of the welding torch 2 using the tool 1. The insulator 24 is removed with the nozzle 25 removed. At this time, the chip 23 may be attached or removed (in the illustrated example, it is removed). When removing the insulator 24 from the welding torch 2, the user holds the grip portion 12 of the tool 1 and sandwiches the insulator 24 with the second sandwiching portion 16. Subsequently, the user squeezes the grip portion 12 and rotates the tool 1 in a direction in which the screwing between the insulator 24 and the tip body 22 is released. As a result, the insulator 24 rotates together with the tool 1, and the insulator 24 is unscrewed from the tip body 22. Then, the user pulls out the insulator 24 that has been unscrewed from the tip body 22 and the welding wire 26. Thereby, the insulator 24 is removed from the welding torch 2. When attaching the insulator 24, the reverse of the above process is performed.

  FIG. 9 shows a method of pulling out the welding wire 26 of the welding torch 2 using the tool 1. When pulling out the welding wire 26, the nozzle 25 may be attached or removed (in the example shown, it is attached). When pulling out the welding wire 26 from the welding torch 2, the user holds the grip portion 12 of the tool 1 and sandwiches the welding wire 26 with the first sandwiching portion 13. Then, the user grasps the grip portion 12 and pulls the tool 1. Thereby, the welding wire 26 is pulled out from the welding torch 2.

  FIG. 10 shows a method for removing spatter adhering to the nozzle 25 of the welding torch 2 using the first sandwiching portion 13 of the tool 1. Removal of the spatter adhering to the nozzle 25 is performed by removing the nozzle 25. The user has the nozzle 25 in one hand and the grip portion 12 of the tool 1 in the other hand. Then, the user sandwiches the nozzle 25 so as to contact the inner peripheral surface and the outer peripheral surface of the nozzle 25 with the first sandwiching portion 13, and rubs the tool 1 so as to rub the inner and outer peripheral surface of the nozzle 25 with the first sandwiching portion 13. move. Thereby, the spatter adhering to the inner peripheral surface of the nozzle 25 and the spatter adhering to the inner peripheral surface of the nozzle 25 are scraped off and removed.

  FIGS. 11A and 11B show how to use the tool 1 when the diameter of the nozzle 25 is different. FIG. 11A shows a method for removing the spatter attached to the nozzle 25 having a relatively small diameter. In this case, the first sandwiching portion 13 and the step portion 14 of the tool 1 are used. The first clip portion 13 is inserted into the nozzle 25, the step end surface 14 a is brought into contact with the tip of the nozzle 25, and the tip portion rear surface 13 b is brought into contact with the inner peripheral surface of the nozzle 25. Then, the tool 1 is rotated so that the tip end of the nozzle 25 is rubbed with the step end surface 14a, and the inner peripheral surface of the nozzle 25 is rubbed with the tip end back surface 13b. Thereby, the sputter | spatter adhering to the front-end | tip of the nozzle 25 and the sputter | spatter adhering to the internal peripheral surface of the nozzle 25 can be scraped off simultaneously.

  FIG. 11B shows a method for removing the spatter attached to the nozzle 25 having a relatively large diameter. The diameter of the nozzle 25 is larger than that of FIG. In this example, since the step 14 can be inserted into the nozzle 25, the step 14 and the step 15 are used. The first sandwiching portion 13 and the stepped portion 14 are inserted into the nozzle 25, the stepped end surface 15 a is brought into contact with the tip of the nozzle 25, and the stepped back surface 14 b is brought into contact with the inner peripheral surface of the nozzle 25. Then, the tool 1 is rotated so that the tip of the nozzle 25 is rubbed with the step end surface 15a and the inner peripheral surface of the nozzle 25 is rubbed with the step back surface 14b. When the stepped portion 14 can be inserted into the nozzle 25, it is easier to insert the stepped portion 14 into the nozzle 25 than to insert only the first sandwiching portion 13 into the nozzle 25. The tool 1 can be rotated so that the tip 1 and the inner peripheral surface of the nozzle 25 are rubbed by bringing the tool 1 into contact with the peripheral surface. Thereby, the sputter | spatter adhering to the front-end | tip of the nozzle 25 and the sputter | spatter adhering to the internal peripheral surface of the nozzle 25 can be scraped off simultaneously.

  According to the tool 1 of the present embodiment, the spatter adhering to the inner and outer peripheral surfaces of the nozzle 25 can be scraped off using the first sandwiching portion 13. In addition, when the diameter of the nozzle 25 is relatively small and only the first sandwiching portion 13 can be inserted into the nozzle 25, the first sandwiching portion 13 is inserted into the nozzle 25, and the stepped portion 14 and the first sandwiching portion are inserted. The sputter | spatter adhering to the front-end | tip and inner peripheral surface of the nozzle 25 can be scraped off simultaneously by rotating the tool 1 so that the front-end | tip and inner peripheral surface of the nozzle 25 may be rubbed in the part 13. FIG. In addition, when the nozzle 25 has a relatively large diameter and the first sandwiching portion 13 and the stepped portion 14 can be inserted into the nozzle 25, the first sandwiching portion 13 and the stepped portion 14 are inserted into the nozzle 25, and the step The tool 1 is rotated so that the tip 15 and the inner peripheral surface of the nozzle 25 are rubbed by the portion 15 and the stepped portion 14, and the spatter adhering to the tip and the inner peripheral surface of the nozzle 25 can be scraped off simultaneously. Therefore, the spatter adhering to the tip and inner peripheral surface of the nozzle 25 can be scraped off simultaneously with respect to the nozzle 25 having a different diameter, and the spatter adhering to the nozzle 25 can be efficiently removed.

  Also, using the first sandwiching portion 13, the second sandwiching portion 16, the third sandwiching portion 17, and the cutter blade 18, the welding wire 26 is pulled out, the nozzle 25 and the insulator 24 are detached, the tip 23 is detached, and The welding wire 26 can be cut, which is highly convenient. Moreover, since the 2nd clamping part 16 and the 3rd clamping part 17 are comprised so that flat cylindrical space 16a, 17a may be formed when a pair of metal stay 10 is closed, they are various thickness. The nozzle 25, the insulator 24, and the chip 23 can be sandwiched. Therefore, it is possible to cope with various types of welding torches 2 having different thicknesses of the nozzle 25, the insulator 24, and the tip 23, which is highly convenient.

  FIGS. 12A and 12B show a modification of the tool 1. The tool 1 includes three step portions 31, 32, and 33 instead of including the two step portions 14 and 15 in the above embodiment. The three step portions 31, 32, and 33 are stepped in height from the opposed inner surface 13 a of the metal stay 10 toward the pivot shaft 11 from the tip of the first sandwiching portion 13. The height of the step portion 31 is lower than the height of the step portion 14 in the above embodiment. Further, the height of the stepped portion 32 is higher than the height of the stepped portion 14 in the above embodiment, and is lower than the height of the stepped portion 15 in the above embodiment. Further, the height of the step portion 33 is the same as the height of the step portion 15 in the above embodiment. That is, the tool 1 has a configuration in which the number of the stepped portions is increased and the height change between the stepped portions is reduced as compared with the above embodiment. The step end surface 31a and the step back surface 31b of the step portion 31, the step end surface 32a and the step back surface 32b of the step portion 32, and the step end surface 33a and the step back surface 33b of the step portion 33 are the back surfaces of the metal stay 10, respectively. It has become. The step portions 31, 32, and 33 are provided symmetrically with respect to each other as viewed from the direction of the pivot shaft 11 with the opposed inner surface 13 a as a boundary. About another structure, it is the same as that of the said embodiment.

  According to such a tool 1, by selectively using the first sandwiching portion 13 and the stepped portion 31, the stepped portion 31 and the stepped portion 32, or the stepped portion 32 and the stepped portion 33 according to the nozzle diameter, By rotating the tool 1 so as to rub the nozzle tip and inner peripheral surface more easily with nozzles having different diameters, the spatter adhering to the nozzle tip and inner peripheral surface can be scraped off simultaneously. The spatter adhering to the surface can be removed more efficiently.

  In addition, this invention is not restricted to the structure of the said embodiment, A various deformation | transformation is possible. For example, four or more stepped portions whose height from the opposing inner surface 13a is increased stepwise may be provided. Further, knurls for scraping off the sputters adhering to the nozzle 25 may be formed on the tip back surface 13b and the step back surfaces 14b, 15b, 31b, 32b, 33b. Further, knurls for scraping off the spatter adhering to the nozzle 25 may be formed on the step end faces 14a, 15a, 31a, 32a, 33a. Moreover, the position of the 3rd clamping part 17 and the cutter blade 18 may be reversed. That is, the third sandwiching portion 17 may be present between the pivot shaft 11 and the cutter blade 18, and the cutter blade 18 may be present between the first sandwiching portion 13 and the third sandwiching portion 17. . In addition, the present invention does not include the second sandwiching portion 16, the third sandwiching portion 17, and the cutter blade 18, but includes only the grip portion 12, the first sandwiching portion 13, and the plurality of step portions 14 and 15. It may be provided.

DESCRIPTION OF SYMBOLS 1 Welding torch maintenance tool 2 Welding torch 10 Metal stay 11 Pivot shaft 12 Grip part 13 1st clamping part 13a Opposing inner surface 13b Tip part back surface 14, 15 Step part 14a, 15a Step end face 14b, 15b Step back surface 16 2nd Pinching portion 16a Flat cylindrical space 16b Curved surface 17 Third pinching portion 17a Flat cylindrical space 17b Curved surface 18 Cutter blade 19 Spring 21 Torch body 22 Tip body 23 Tip 24 Insulator 25 Nozzle 26 Welding wires 31, 32, 33 Stepped portions 31a, 32a , 33a Step end face 31b, 32b, 33b Step back

Claims (4)

A welding torch maintenance tool in which a pair of metal stays are rotatably supported by intersecting in an X shape around a pivot axis,
The pair of metal stays are:
A pair of grip portions on one side across the pivot shaft for a user to rotate the metal stay;
A pair of first sandwiching portions at the tip of the other side across the pivot shaft and sandwiching the object between the opposed inner surfaces of the metal stay,
On both back surfaces of the pair of metal stays constituting the first sandwiching portion, a plurality of step portions whose height from the opposing inner surface increases stepwise from the tip toward the pivot shaft side are provided. , Welding torch maintenance tools.   2. The welding torch maintenance tool according to claim 1, wherein the plurality of stepped portions are provided symmetrically with respect to the opposed inner surface as viewed from the pivot axis direction. The metal stay is
A second sandwiching portion that is located between the pivot shaft and the grip portion and forms a flat cylindrical space when viewed from the pivot shaft direction when the metal stay is rotated around the pivot shaft and closed. The welding torch maintenance tool according to claim 1 or 2, further comprising: The metal stay is
A cutter blade that is between the first sandwiching portion and the pivot shaft and that engages with the cutting edge when the metal stay is rotated around the pivot shaft and closed; and viewed from the pivot shaft direction. The welding torch maintenance tool according to any one of claims 1 to 3, further comprising a third sandwiching portion that forms a flat cylindrical space.

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