JP2015205283A - Arc processing torch and arc processing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an arc processing torch capable of more efficiently performing arc processing, an arc processing torch capable of reducing fatigue of an operator, or an arc processing torch capable of achieving improvement of quality of the arc processing.SOLUTION: An arc processing torch comprises: a handle 3; and an insertion member 11 which is surrounded by the handle 3 and into which a wire 81 is inserted. The handle 3 comprises: a gripping portion 31 which is gripped by an operator; a tip portion 32 from which the insertion member 1 is extended and exposed; and a support part 35 which supports the insertion member 1. The tip portion 32 is positioned on a feeding direction front side F11 of the gripping portion 31 in a direction F1 along a feeding path P1 of the wire 81. The gripping portion 31 has an inner surface 314 facing a side where the insertion member 1 is positioned, and the support part 35 erects from the inner surface 314 toward the insertion member 1.

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. A welding torch used in the arc welding method includes, for example, a handle, a torch body, and a cable. A wire as a consumable electrode is inserted through the torch body and the cable. The handle houses the torch body and the cable. The operator performs welding at a desired location while holding the handle.

  During conventional welding, heat may be generated at some part inside the handle, and the handle itself may become hot. For example, when the surface temperature of the handle rises to 80 degrees or more, the operator may not be able to grip the handle that has become hot, and may suspend welding until the handle temperature drops. This is very inefficient. In addition, in order to reduce the fatigue of the operator, there has been a demand for improving the operability of the welding torch, but it has not been able to fully meet this demand. The welding torch is disclosed in Patent Document 1, for example.

Japanese Utility Model Publication No.59-120076

  The present invention has been conceived under the circumstances described above, and is an arc processing torch capable of performing arc processing more efficiently, and for arc processing capable of reducing operator fatigue. The main problem is to provide a torch or an arc processing torch that can improve the quality of arc processing.

  According to a first aspect of the present invention, a handle and an insertion member that is surrounded by the handle and allows a wire to pass therethrough, the handle includes a gripping part for an operator to grip, and the insertion member extends. A distal end portion that exits, the distal end portion is located on the front side in the feeding direction of the direction along the feeding path of the wire from the gripping portion, and the insertion member includes a non-heat generating portion, There is provided an arc processing torch that includes at least one heat generating portion, and all portions of the insertion member surrounded by the gripping portion are configured by the non-heat generating portion.

  Preferably, each of the insertion members includes a conductive cylindrical body and a cable through which a wire is inserted, and the cable has a conductor layer in contact with the conductive cylindrical body. One heat generating portion is provided, and a contact area between the conductive cylindrical body and the conductor layer constitutes the first heat generating portion.

  Preferably, the first heat generating portion is located inside the tip portion.

  Preferably, the conductor layer has a cylindrical shape extending along the wire feeding path.

  Preferably, the cable includes an insulating outer shell that surrounds the conductor layer, and the conductor layer has a conductor extension portion extending from the outer skin in front of the feeding direction, and the conductor extension The protruding portion is in contact with the conductive cylindrical body, and a contact region between the conductive cylindrical body and the conductor extension portion constitutes the first heat generating portion.

  Preferably, the conductor layer has a conductor cylinder part surrounded by the outer skin, and the conductor extension part has a cylindrical shape having an inner diameter larger than an inner diameter of the conductor cylinder part.

  Preferably, a dimension of a contact region between the conductive cylindrical body and the conductor layer in a direction along the wire feeding path is 10 to 18 mm.

  Preferably, the insertion member includes a first fixing member disposed at a position overlapping a contact region between the conductive cylindrical body and the conductor layer in a direction along the feeding path, and the conductor layer includes: It is interposed between the conductive cylindrical body and the first fixing member, and the first fixing member presses the conductor layer against the conductive cylindrical body.

  Preferably, the conductive cylindrical body has a base portion and a rear portion, the base portion is in contact with the conductor layer, and the rear portion is opposite to the front in the feeding direction than the base portion. It is located on the rear side in the feeding direction, and the rear portion is inserted into the cable.

  Preferably, the insertion member includes a torch body extending from the handle, the torch body has a body conductive portion that contacts the conductive cylindrical body, and the at least one heat generating portion is a second heat generating portion. The contact region between the conductive cylindrical body and the body conductive portion constitutes the second heat generating portion.

  Preferably, the second heat generating portion is located inside the tip portion.

  Preferably, the body conductive portion has a cylindrical shape extending along the wire feeding path.

  Preferably, the body conductive portion has a body main portion and a body protruding portion, and the body protruding portion protrudes from the body main portion to the rear side in the feeding direction opposite to the front in the feeding direction. And the body protruding portion is in contact with the conductive cylindrical body, and a contact region between the conductive cylindrical body and the body protruding portion is the second portion. It constitutes a heat generating part.

  Preferably, the conductive cylindrical body has a base portion and a front portion, the base portion is in contact with the conductor layer, and the front portion is located on the front side in the feeding direction with respect to the base portion. The body protruding portion is inserted into the front portion, and the front portion is in contact with the body protruding portion.

  Preferably, the body protrusion is inserted into the base.

  Preferably, the front portion has a plurality of extending pieces extending forward from the base portion in the feeding direction, and the plurality of extending pieces are provided through slits extending in a direction along the feeding path. Are spaced apart from each other in the circumferential direction of the feeding path.

  Preferably, the insertion member includes a second fixing member disposed at a position overlapping with a contact region between the conductive cylindrical body and the body conductive portion in a direction along the feeding path, and the conductive cylindrical shape The body is interposed between the body conductive portion and the second fixing member, and the second fixing member presses the conductive cylindrical body against the body conductive portion.

  Preferably, the torch body includes a body insulating portion surrounding the body conductive portion.

  According to a second aspect of the present invention, the apparatus includes a handle and an insertion member that is surrounded by the handle and allows a wire to pass therethrough. The handle includes a gripping part for an operator to hold, and the insertion member extends. A tip portion that exits, and a support portion that supports the insertion member, and the tip portion is located on the front side in the feeding direction in the direction along the feeding path of the wire from the gripping portion, The grip portion has an inner surface facing the side where the insertion member is located, and the support portion is provided with an arc processing torch standing up from the inner surface toward the insertion member.

  Preferably, the gripping part has a first gripping part for gripping with an operator's middle finger and ring finger, the support part has a first support piece for supporting the insertion member, and the first support The piece is located on the rear side in the feed direction opposite to the front in the feed direction with respect to the first grip portion.

  Preferably, the support portion includes a second support piece positioned at a position overlapping the first grip portion in the direction along the feeding path.

  Preferably, the support portion includes a third support piece positioned between the first support piece and the second support piece in a direction along the feeding path.

  Preferably, the first support piece, the second support piece, and the third support piece press the insertion member, and the first support piece and the second support piece are against the insertion member. The direction of the force to be applied is opposite to the direction of the force that the third support piece applies to the insertion member.

  Preferably, the feeding path is curved in a first direction inside the gripping portion, and the first direction is a direction perpendicular to the direction along the feeding path.

  Preferably, the first support piece and the second support piece are in contact with a portion located on the first direction side of the insertion member, and the third support piece is of the insertion member, It is in contact with a portion located on the second direction side opposite to the first direction.

  Preferably, the first support piece, the second support piece, and the third support piece stand upright from the inner surface.

  Preferably, the support portion is formed with a vent hole that connects a space outside the handle and a space inside the handle.

  Preferably, each of the insertion members includes a conductive cylindrical body and a cable through which a wire is inserted, the cable has a conductor layer that contacts the conductive cylindrical body, and the support portion contacts the cable. It touches.

  Preferably, the cable includes an insulating outer skin that surrounds the conductor layer, and the support portion is in contact with the outer skin.

  According to a third aspect of the present invention, the apparatus includes a handle and an insertion member that is surrounded by the handle and allows a wire to pass therethrough. The handle includes a gripping portion for an operator to hold, and the insertion member extends. A leading end portion, and the leading end portion is located on the front side in the feeding direction in the direction along the feeding path of the wire from the gripping portion, and a front opening is formed in the leading end portion. The insertion member extends from the front opening, the first traveling direction, which is the traveling direction of the wire located in the front opening, is inclined with respect to an imaginary straight line, The wire has a first grip portion for gripping with an operator's middle finger and ring finger, and the imaginary straight line overlaps the first grip portion in a direction along the wire feeding path. Connection of the supply route In it, the arc processing torch is provided.

  Preferably, the inclination angle of the first traveling direction with respect to the virtual straight line is 1 to 20 degrees.

  Preferably, a rear opening is formed in the grip portion, the insertion member extends from the rear opening, and the second traveling direction, which is the traveling direction of the wire located in the rear opening, is virtual. Inclined with respect to a straight line.

  Preferably, the inclination angle of the second traveling direction with respect to the virtual straight line is 25 to 45 degrees.

  Preferably, the first traveling direction is inclined with respect to the second traveling direction, and the feeding path has a curved portion inside the handle.

  Preferably, an inclination angle of the second traveling direction with respect to the first traveling direction is 37 to 52 degrees.

  Preferably, the feeding path is curved in a first direction inside the gripping portion, and the first direction is a direction perpendicular to the direction along the feeding path.

  Preferably, the tip portion has a finger contact surface that contacts an index finger or thumb of an operator, and the finger contact surface has a concave shape that is recessed toward the wire feeding path.

  Preferably, the finger contact surface has a concave shape extending in a crossing manner with respect to the wire feeding path in a front view.

  Preferably, a switch lever with which an operator's index finger comes into contact is provided at the tip portion, and the finger contact surface is provided at the tip portion from the place where the switch lever is provided. It is formed over a portion opposite to the portion where the switch lever is provided across the path.

  Preferably, the gripping part has an outer surface facing outward of the handle, the outer surface has a top portion located on the first direction side in the outer surface, and the first direction is in the feeding path. It is a direction orthogonal to the direction along which the said top part is curved-surface shape curved to the said 1st direction side.

  Preferably, the contour of the top portion has a radius of curvature of 140 to 190 mm when viewed from the front.

  Preferably, the outer surface has a bottom portion located on a second direction side opposite to the first direction on the outer surface, and a part of the contour of the bottom portion has a curvature radius of 280 to 310 mm in a front view. It is.

  Preferably, the outer surface has a plurality of band-shaped parts, and each of the plurality of band-shaped parts extends in a direction along the feeding path, and the plurality of band-shaped parts are arranged around the feeding path. A ridge line is formed between two strip-shaped portions that are arranged along the direction and are adjacent to each other in the circumferential direction among the plurality of strip-shaped portions.

  Preferably, the grip portion has a second grip portion for gripping with an operator's little finger, and the second grip portion is a portion having a diameter smaller than that of the first grip portion.

  According to a fourth aspect of the present invention, the apparatus includes a handle and an insertion member that is surrounded by the handle and allows a wire to pass therethrough. The handle includes a gripping part for an operator to hold, and the insertion member extends. A leading end portion, and the leading end portion is located on the front side in the feeding direction in the direction along the feeding path of the wire from the gripping portion, and a front opening is formed in the leading end portion. A rear opening is formed in the gripping portion, and the insertion member extends from the front opening and the rear opening, respectively, and a first progression that is a traveling direction of the wire located in the front opening. The arc treatment torch is inclined with respect to a second traveling direction which is a traveling direction of the wire located in the rear opening, and the feeding path has a curved portion inside the handle. Offer It is.

  Preferably, an inclination angle of the second traveling direction with respect to the first traveling direction is 37 to 52 degrees.

  Preferably, the feeding path is curved in a first direction inside the gripping portion, and the first direction is a direction perpendicular to the direction along the feeding path.

  Preferably, the ratio of the path length of the wire feeding path curved in the handle to the path length of the wire feeding path in the handle is 30 to 60%.

  Preferably, a path length of a feeding path of the wire that is curved inside the handle is 70 to 110 mm.

  Preferably, the minimum curvature radius of the feeding path of the wire which is curved inside the handle is 100 to 130 mm.

  Preferably, the first traveling direction is inclined with respect to a virtual straight line, the gripping portion has a first gripping part for gripping with a middle finger and a ring finger of an operator, and the virtual straight line is the wire The tangent of the wire feeding path at any position overlapping the first gripping portion in the direction along the feeding path.

  Preferably, the second traveling direction, which is the traveling direction of the wire located in the rear opening, is inclined with respect to the virtual straight line.

  Preferably, the insertion member has a torch body extending from the tip portion, and a radius of curvature of the feeding path of the wire that is curved in the torch body is over the entire feeding path that is curved. , In the range of 50-140 mm.

  Preferably, the tip portion has a finger contact surface that contacts an index finger or thumb of an operator, and the finger contact surface has a concave shape that is recessed toward the wire feeding path.

  Preferably, the finger contact surface has a concave shape extending in a crossing manner with respect to the wire feeding path in a front view.

  Preferably, a switch lever with which an operator's index finger comes into contact is provided at the tip portion, and the finger contact surface is provided at the tip portion from the place where the switch lever is provided. It is formed over a portion opposite to the portion where the switch lever is provided across the path.

  Preferably, the gripping part has an outer surface facing outward of the handle, the outer surface has a top portion located on the first direction side in the outer surface, and the first direction is in the feeding path. It is a direction orthogonal to the direction along which the said top part is curved-surface shape curved to the said 1st direction side.

  Preferably, the contour of the top portion has a radius of curvature of 140 to 190 mm when viewed from the front.

  Preferably, the outer surface has a bottom portion located on a second direction side opposite to the first direction on the outer surface, and a part of the contour of the bottom portion has a curvature radius of 280 to 310 mm in a front view. It is.

  Preferably, the outer surface has a plurality of band-shaped parts, and each of the plurality of band-shaped parts extends in a direction along the feeding path, and the plurality of band-shaped parts are arranged around the feeding path. A ridge line is formed between two strip-shaped portions that are arranged along the direction and are adjacent to each other in the circumferential direction among the plurality of strip-shaped portions.

  Preferably, the grip portion has a second grip portion for gripping with an operator's little finger, and the second grip portion is a portion having a diameter smaller than that of the first grip portion.

  According to a fifth aspect of the present invention, an arc processing torch provided by any one of the first to fourth aspects of the present invention, a power source for passing a current through a wire inserted through the insertion member, An arc processing system is provided.

  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 sectional drawing which shows the torch for arc processing shown in FIG. It is a figure which abbreviate | omits the insertion member from FIG. FIG. 3 is a partially enlarged view of FIG. 2. It is sectional drawing of the insertion member which follows the VV line of FIG. It is sectional drawing of the insertion member which follows the VI-VI line of FIG. It is sectional drawing which follows the VII-VII line of FIG. It is a front view which shows the handle | steering-wheel in the arc processing torch shown in FIG. It is a rear view which shows the handle | steering-wheel in the arc processing torch shown in FIG. It is a top view which shows the handle | steering-wheel in the arc processing torch shown in FIG. It is a bottom view which shows the handle | steering-wheel in the arc processing torch shown in FIG. (A) is a photograph showing the posture of the worker when the conventional arc processing torch is used, and (b) is the worker when using the arc processing torch according to the first embodiment of the present invention. It is a photograph which shows the attitude | position of. It is sectional drawing which shows the torch for arc processing of 2nd Embodiment of this invention. (A) is a front view of the handle in the arc processing torch of the first embodiment of the present invention, (b) is a rear view of the handle in the arc processing torch of the first embodiment of the present invention, (C) is a top view of the handle in the arc processing torch of the first embodiment of the present invention, and (d) is a bottom view of the handle in the arc processing torch of the first embodiment of the present invention. (A) is a left side view of the handle in the arc processing torch of the first embodiment of the present invention, and (b) is a right side view of the handle in the arc processing torch of the first embodiment of the present invention. is there. (A) is the perspective view of the handle | steering-wheel in the arc processing torch of 1st Embodiment of this invention seen from diagonally upper left, (b) is 1st implementation of this invention seen from diagonally right upper. It is a perspective view of the handle in the arc processing torch of the embodiment, (c) is a perspective view of the handle in the arc processing torch of the first embodiment of the present invention, as viewed from the lower left, (d) FIG. 3 is a perspective view of a handle in the arc processing torch according to the first embodiment of the present invention, as seen from diagonally below right.

  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.

[About arc processing system A1]
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 wire 81 to perform arc welding on the processing target member W1. The arc processing torch T1 guides the wire 81 fed from a feeding device (not shown) to the workpiece W1.

[About arc processing torch T1]
The arc processing torch T1 shown in FIG. 1 includes an insertion member 1, a handle 3, and a torch switch 4.

[About the insertion member 1]
The insertion member 1 guides the wire 81 to a desired location during the arc process of the member to be processed W1. The insertion member 1 allows the wire 81 to be inserted.

  FIG. 2 is a sectional view showing the arc processing torch shown in FIG.

  As shown in FIGS. 1 and 2, the insertion member 1 includes a nozzle 11, a torch body 12, a cable 14, a conductive cylindrical body 15, a liner 16, a first fixing member 181, and a second fixing member. 182.

  The nozzle 11 shown in FIG. 1 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 being dissolved into the member to be treated W1. A power feeding chip (not shown) is provided inside the nozzle 11. The power supply tip supplies power to the wire 81 being supplied when the arc processing torch T1 is used. Then, the supplied wire 81 is fed toward the member to be processed W1.

  The torch body 12 shown in FIGS. 1 and 2 is a cylindrical member. The torch body 12 allows the wire 81 to pass therethrough. 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 curved portion so that the operator can easily point the nozzle 11 toward the processing target member W1.

  FIG. 4 is a partially enlarged view of FIG. FIG. 5 is a cross-sectional view of the insertion member taken along line VV in FIG. 6 is a cross-sectional view of the insertion member taken along line VI-VI in FIG. 7 is a cross-sectional view taken along line VII-VII in FIG.

  The torch body 12 shown in FIGS. 1, 2, and 4 includes a body conductive portion 121 and a body insulating portion 123.

  The body conductive portion 121 is made of a conductive material and has a cylindrical shape extending along the feeding path P <b> 1 of the wire 81. The body conductive part 121 has a body main part 121A and a body protruding part 121B. The body main part 121A and the body protruding part 121B have a cylindrical shape extending along the feeding path P1 of the wire 81. The main body 121A is located outside the handle 3. The body protruding portion 121B protrudes from the body main portion 121A toward the feeding direction rear side F12 opposite to the feeding direction front side F11. The body protrusion 121B is located inside the handle 3. The outer diameter of the body protruding portion 121B is smaller than the outer diameter of the body main portion 121A.

  The body insulating part 123 is made of an insulating material and surrounds the body conductive part 121. The body insulating portion 123 has a cylindrical shape that extends along the feeding path P <b> 1 of the wire 81. Most of the body insulating portion 123 is located outside the handle 3.

  The cable 14 shown in FIGS. 1, 2, and 4 is a cylindrical member. The cable 14 allows the wire 81 to pass therethrough. The cable 14 guides a wire 81 fed from a feeding device (not shown).

  As shown in FIGS. 2 and 7, the cable 14 includes an inner film 141, a conductor layer 142, and an outer skin 143.

  The inner film 141 and the outer skin 143 are made of an insulating material and have a cylindrical shape extending along the feeding path P1 of the wire 81. Examples of the insulating material constituting the inner film 141 and the outer skin 143 include chloroprene rubber, ethylene propylene rubber, and polyethylene rubber.

  The conductor layer 142 is interposed between the inner film 141 and the outer skin 143. That is, the conductor layer 142 is surrounded by the outer skin 143, and the inner film 141 is surrounded by the conductor layer 142. The conductor layer 142 is made of a conductive material and has a cylindrical shape extending along the feeding path P1 of the wire 81. The conductor layer 142 is, for example, a state in which a bundle of thin conducting wires is knitted.

  As shown in FIGS. 2 and 4, the conductor layer 142 includes a conductor tube portion 142A and a conductor extension portion 142B.

  The conductor cylinder portion 142A is a portion of the conductor layer 142 surrounded by the outer skin 143. The conductor extension 142B extends from the outer skin 143 to the front F11 in the feed direction in the direction F1 along the feed path P1 of the wire 81. The conductor extension 142B has a cylindrical shape with an inner diameter larger than the inner diameter of the conductor cylinder 142A (specifically, the inner diameter of the conductor cylinder 142A existing inside the gripping portion 31).

  The conductive cylindrical body 15 shown in FIGS. 2 and 4 to 6 is made of a conductive material and transmits power from the conductor layer 142 in the cable 14 to the body conductive portion 121 in the torch body 12. . The conductive cylindrical body 15 is in contact with the conductor layer 142 (specifically, the conductor extending portion 142B) and the body conductive portion 121 (specifically, the body protruding portion 121B). Therefore, when the arc processing system A1 is used, a current is passed from the conductor layer 142 (specifically, the conductor extending portion 142B) through the conductive cylindrical body 15 to the body conductive portion 121 (specifically, the body protruding portion 121B). ).

  As clearly shown in FIG. 4, the conductive cylindrical body 15 includes a base portion 150, a front portion 151, and a rear portion 152.

  The base 150 has a cylindrical shape and is in contact with the conductor layer 142. Specifically, the base 150 is in contact with the conductor extension 142B. The dimension L31 (see FIG. 4) of the contact region between the conductive cylindrical body 15 and the conductor layer 142 in the direction F1 along the feeding path P1 of the wire 81 is, for example, 10 to 18 mm, and more preferably 12 ~ 16 mm. A body protrusion 121B is inserted into the base 150.

  The front portion 151 is located closer to the front side F11 in the feeding direction than the base portion 150. A body protrusion 121B is inserted into the front portion 151. The front portion 151 is in contact with the body protruding portion 121B. As shown in FIGS. 4 and 6, the front portion 151 has a plurality of extending pieces 151A. The plurality of extending pieces 151 </ b> A extend from the base portion 150 to the forward direction F <b> 11 in the feeding direction. The plurality of extending pieces 151A are separated from each other in the circumferential direction of the feeding path P1 through a slit 151S extending in the direction F1 along the feeding path P1.

  The rear part 152 shown in FIG. 4 has a cylindrical shape, and is located on the feed direction rear F12 side opposite to the feed direction front F11 from the base part 150. The rear portion 152 is inserted into the cable 14. The rear part 152 is fixed to the inner membrane 141.

  The liner 16 shown in FIGS. 2 and 4 to 7 has a cylindrical shape extending along the feeding path P1 of the wire 81. The liner 16 is made of a conductive material such as Fe. The liner 16 is provided from the inside of the cable 14 to the inside of the torch body 12 through the inside of the conductive cylindrical body 15. The liner 16 is for smoothly feeding the wire 81. Since the liner 16 is often made of a material having a higher resistivity than the material constituting the body conductive portion 121 and the like, almost no current flows through the liner 16 when the arc processing system A1 is used.

  The first fixing member 181 shown in FIGS. 2, 4, and 5 is disposed at a position overlapping the contact region between the conductive cylindrical body 15 and the conductor layer 142 in the direction F <b> 1 along the feeding path P <b> 1. The conductor layer 142 is interposed between the conductive cylindrical body 15 and the first fixing member 181. The first fixing member 181 presses the conductor layer 142 against the conductive cylindrical body 15. Thereby, the conductor layer 142 is fixed to the conductive cylindrical body 15.

  The second fixing member 182 shown in FIGS. 2, 4, and 6 is disposed at a position overlapping the contact area between the conductive cylindrical body 15 and the body conductive portion 121 in the direction F <b> 1 along the feeding path P <b> 1. . The conductive cylindrical body 15 is interposed between the body conductive portion 121 and the second fixing member 182. The second fixing member 182 presses the conductive cylindrical body 15 against the body conductive portion 121. In the present embodiment, the plurality of extending pieces 151A in the front portion 151 are tightened from the outside, whereby the extending pieces 151A are pressed against the body conductive portion 121 (specifically, the body protruding portion 121B). Thereby, the conductive cylindrical body 15 is fixed to the body conductive portion 121.

  The insertion member 1 includes a first heat generating part 191, a second heat generating part 192, and a non-heat generating part 195. The first heat generating portion 191 and the second heat generating portion 192 are portions that generate heat when the arc processing system A1 is used.

  As shown in FIGS. 2, 4, and 5, the first heat generating portion 191 is configured by a contact region between the conductive cylindrical body 15 and the conductor layer 142. More specifically, the 1st heat generating part 191 is comprised by the contact area of the base 150 and the conductor extension part 142B. One reason for the heat generated in the contact area between the base 150 and the conductor extension 142B is that when the arc processing system A1 is used, there is a difference between the two different objects, the base 150 and the conductor extension 142B. It is conceivable that a part of the electric energy of the current is generated as Joule heat due to a very large current flowing through.

  As shown in FIGS. 2, 4, and 6, the second heat generating portion 192 is configured by a contact area between the conductive cylindrical body 15 and the body conductive portion 121. More specifically, the second heat generating portion 192 is configured by a contact area between the front portion 151 and the body protruding portion 121B. One reason for the heat generated in the contact area between the front part 151 and the body protrusion 121B is that when the arc processing system A1 is used, the front part 151 and the body protrusion 121B, which are two different objects, are used. It is conceivable that a part of the electric energy of the current is generated as Joule heat due to a very large current flowing through.

  The non-heat generating portion 195 is a portion that is cooler than the first heat generating portion 191 and the second heat generating portion 192 when the arc processing system A1 is used. In the present embodiment, in the handle 3, the non-heat generating portion 195 is a portion other than the first heat generating portion 191 and the second heat generating portion 192 in the insertion member 1. Note that the insertion member 1 does not necessarily include two heat generating portions. For example, the insertion member 1 may have only one heat generating part.

[About handle 3]
The handle 3 has a cylindrical shape. The handle 3 functions as a handle portion when the operator performs arc processing. In the present embodiment, the handle 3 has, for example, a shape that is easy for a human to grip in order to improve the work efficiency of arc processing. A wire 81 is inserted into the handle 3. The handle 3 is made of an insulating material such as resin.

  FIG. 8 is a front view showing a handle in the arc processing torch shown in FIG. FIG. 9 is a rear view showing the handle in the arc processing torch shown in FIG. 10 is a plan view showing a handle in the arc processing torch shown in FIG. FIG. 11 is a bottom view showing a handle in the arc processing torch shown in FIG. FIGS. 14 to 16 show a six-side view and a perspective view of the handle of the arc processing torch according to the present embodiment.

  As shown in FIGS. 2 and 8 to 11, the handle 3 includes a gripping portion 31 and a tip portion 32.

  The distal end portion 32 has a cylindrical shape, and is located on the forward direction F11 side in the feeding direction in the direction F1 along the feeding path P1 of the wire 81 relative to the gripping portion 31. The insertion member 1 extends from the distal end portion 32. As shown in FIG. 4, the entire conductive cylindrical body 15 is disposed inside the distal end portion 32. A first heat generating portion 191 and a second heat generating portion 192 are located inside the distal end portion 32. A relatively large space is formed between the tip portion 32 and the first heat generating portion 191 and the second heat generating portion 192. This is to prevent heat generated in the first heat generating portion 191 and heat generated in the second heat generating portion 192 from being transmitted to the distal end portion 32.

  Note that unlike the present embodiment, neither the first heat generating portion 191 nor the second heat generating portion 192 needs to be located inside the distal end portion 32. For example, the 1st heat generating part 191 may be located in the feed direction back F12 side rather than tip part 32. Further, the first heat generating portion 191 may be located on the rear side F12 in the feeding direction from the handle 3.

  A front opening 321 and a switch hole 323 are formed in the distal end portion 32.

  The insertion member 1 extends from the front opening 321. Specifically, the torch body 12 extends from the front opening 321.

  As shown in FIGS. 8 to 11, the distal end portion 32 has a finger contact surface 325 that contacts an operator's index finger or thumb. The finger contact surface 325 has a concave shape that is recessed toward the feeding path P <b> 1 of the wire 81. The finger contact surface 325 has a concave shape extending in a crossing manner with respect to the feeding path P1 of the wire 81 in a front view. The finger contact surface 325 is located on the opposite side of the tip portion 32 from the location where the switch lever 41 (described later) is provided, with the switch lever 41 (described later) provided across the feeding path P1. Is formed over. The finger contact surface 325 is formed on the lower side and the upper side of FIG.

  The switch hole 323 is formed at the position on the second direction X2 side in the distal end portion 32. The switch hole 323 is for arranging the switch lever 41.

  The gripping part 31 is a part for an operator to grip, and has a cylindrical shape. All portions of the insertion member 1 surrounded by the gripping portion 31 are configured by the non-heat generating portion 195.

  A rear opening 311 is formed in the grip portion 31. The insertion member 1 extends from the rear opening 311. Specifically, the cable 14 extends from the rear opening 311.

  As shown in FIGS. 2 and 8 to 11, the gripping part 31 has a first gripping part 316 and a second gripping part 317.

  The first gripping portion 316 is a portion for gripping with the middle finger and ring finger of the worker, and the second gripping portion 317 is a portion for gripping with the operator's little finger. The second grip portion 317 is located closer to the rear side F12 in the feeding direction than the first grip portion 316. The second grip portion 317 has a smaller diameter than the first grip portion 316.

  As shown in FIGS. 2 and 7, the gripping portion 31 has an outer surface 313 and an inner surface 314. The outer surface 313 faces outward of the handle 3, and the inner surface 314 faces the side where the insertion member 1 is located.

  The outer surface 313 has a top 313A and a bottom 313B. The top portion 313A is located on the outer surface 313 on the first direction X1 side. The first direction X1 is a direction orthogonal to the direction F1 along the feeding path P1. The top portion 313A has a curved shape that curves toward the first direction X1. In the present embodiment, the contour of the top portion 313A has, for example, a radius of curvature of 140 to 190 mm when viewed from the front. The bottom 313B is located on the outer surface 313 on the second direction X2 side opposite to the first direction X1. In the present embodiment, a part of the contour of the bottom 313B has a radius of curvature of, for example, 280 to 310 mm when viewed from the front. Specifically, the curvature radius of the contour of the portion formed by the first gripping portion 316 in the bottom portion 313B is, for example, 280 to 310 mm. The curvature radius of the outline of the part comprised by the 2nd holding part 317 among the bottom parts 313B is 20-40 mm, for example. It is preferable that the shapes of the top portion 313A and the bottom portion 313B are curved surfaces that are easy for an operator to grip.

  As shown in FIGS. 8, 9, and 11, the outer surface 313 has a plurality of strip-shaped portions 313 </ b> E. Each of the plurality of strip-like portions 313E extends in the direction F1 along the feeding path P1. The plurality of strip-like portions 313E are arranged along the circumferential direction of the feeding path P1. A ridge line 313F is formed between two belt-like portions 313E adjacent to each other in the circumferential direction among the plurality of belt-like portions 313E. The belt-like portion 313E may be flat or a curved surface. It is preferable that the belt-like portion 313E is constituted by the first grip portion 316.

  As illustrated in FIG. 2, the support portion 35 stands from the inner surface 314 toward the insertion member 1 and supports the insertion member 1. The support portion 35 defines the shape of the insertion member 1 (specifically, the cable 14) inside the handle 3.

  The support part 35 includes a first support piece 351, a second support piece 352, and a third support piece 353. In the present embodiment, a plurality of the first support pieces 351, the second support pieces 352, and the third support pieces 353 are formed, but the first support piece 351, the second support piece 352, and the third support piece 353 are formed. A plurality of support pieces 353 are not necessarily formed.

  The 1st support piece 351 is located in the feed direction back F12 side opposite to the feed direction front F11 rather than the 1st holding part 316. In the present embodiment, the first support piece 351 is for disposing the insertion member 1 substantially at the center of the rear opening 311. A part of the first support piece 351 is in contact with a portion of the insertion member 1 that is located on the first direction X1 side. Specifically, a part of the first support piece 351 is in contact with a portion of the outer skin 143 located on the first direction X1 side. In the present embodiment, the other part of the first support piece 351 is in contact with a portion of the insertion member 1 that is located on the second direction X2 side.

  The second support piece 352 is located at a position overlapping the first grip portion 316 in the direction F1 along the feeding path P1. The second support piece 352 is in contact with a portion of the insertion member 1 that is located on the first direction X1 side. Specifically, the second support piece 352 is in contact with a portion of the outer skin 143 that is located on the first direction X1 side.

  The third support piece 353 is located between the first support piece 351 and the second support piece 352 in the direction F1 along the feeding path P1. The third support piece 353 is in contact with a portion of the insertion member 1 that is located on the second direction X2 side opposite to the first direction X1. Specifically, the third support piece 353 is in contact with a portion of the outer skin 143 located on the second direction X2 side.

  The first support piece 351, the second support piece 352, and the third support piece 353 are erected from the inner surface 314. The first support piece 351, the second support piece 352, and the third support piece 353 press the insertion member 1. The direction of the force that the first support piece 351 and the second support piece 352 give to the insertion member 1 is opposite to the direction of the force that the third support piece 353 gives to the insertion member 1. In the present embodiment, as described above, the first support piece 351 and the second support piece 352 are in contact with a portion of the insertion member 1 that is located on the first direction X1 side. The force which goes to the 2nd direction X2 side is given. On the other hand, as described above, since the third support piece 353 is in contact with a portion of the insertion member 1 that is located on the second direction X2 side, the force directed toward the first direction X1 side with respect to the insertion member 1. Is given.

[About the feeding path P1 of the wire 81]
A feeding path P1 of the wire 81 is defined by the insertion member 1. A specific configuration of the feeding route P1 of the present embodiment is as follows.

  FIG. 3 is a diagram showing the insertion member omitted from FIG.

  As shown in FIG. 3, the first traveling direction Y1, which is the traveling direction of the wire 81 located in the front opening 321, is inclined with respect to the virtual straight line L11. The virtual straight line L11 is a tangent to the feeding path P1 of the wire 81 at any position overlapping the first gripping portion 316 in the direction F1 along the feeding path P1 of the wire 81. The inclination angle θ1 of the first traveling direction Y1 with respect to the virtual straight line L11 is, for example, 1 to 20 degrees, and preferably 7 to 14 degrees. On the other hand, the second traveling direction Y2 that is the traveling direction of the wire 81 located in the rear opening 311 is inclined with respect to the virtual straight line L11. The inclination angle θ2 of the second traveling direction Y2 with respect to the virtual straight line L11 is, for example, 25 to 45 degrees, and preferably 30 to 38 degrees. The first traveling direction Y1 that is the traveling direction of the wire 81 positioned in the front opening 321 is inclined with respect to the second traveling direction Y2 that is the traveling direction of the wire 81 positioned in the rear opening 311. The inclination angle θ3 of the second traveling direction Y2 with respect to the first traveling direction Y1 is, for example, 37 to 52 degrees. In the present embodiment, the inclination angle θ3 is the sum of the inclination angle θ1 and the inclination angle θ2.

  The feeding path P1 of the wire 81 has a curved portion inside the handle 3. In the present embodiment, the feeding path P1 is curved in the first direction X1 inside the gripping part 31. The curved feeding path P <b> 1 is defined by the cable 14. The minimum curvature radius of the feeding path P1 of the wire 81 curved inside the handle 3 is, for example, 100 to 130 mm. That is, in the present embodiment, a portion of the feeding path P1 of the wire 81 that is curved inside the handle 3 is not formed by bending. On the other hand, the radius of curvature of the feeding path P1 of the wire 81 curved in the torch body 12 is, for example, in the range of 50 to 140 mm over the entire feeding path P1 curved.

  The path length L21 (see FIG. 2) of the feeding path P1 of the wire 81 inside the handle 3 is, for example, 150 to 250 mm. The path length L22 (see FIG. 2) of the feeding path P1 of the wire 81 that is curved inside the handle 3 is, for example, 70 to 110 mm. The ratio of the path length L22 of the feeding path P1 of the wire 81 curved inside the handle 3 to the path length L21 of the feeding path P1 of the wire 81 inside the handle 3 is, for example, 30 to 60%. Preferably, it is 40 to 50%.

[About torch switch 4]
The torch switch 4 shown in FIGS. 2, 4, 8, etc. is housed in the handle 3 and is fixed relative to the handle 3. In the present embodiment, the torch switch 4 is a lever switch. The torch switch 4 has a switch lever 41 and a tact switch 42. The switch lever 41 is disposed in the switch hole 323 and is supported so as to be rotatable with respect to the distal end portion 32. The tact switch 42 is disposed inside the distal end portion 32. When pressed by the operator's index finger, the switch lever 41 rotates, and the switch lever 41 presses the tact switch 42. As a result, the tact switch 42 (that is, the torch switch 4) is turned on. Unlike the present embodiment, the torch switch 4 is not limited to a lever switch, and may be a push button type push switch, for example.

[About power supply 5]
The power supply 5 shown in FIG. 1 passes a current through the wire 81 inserted through the insertion member 1. In the present embodiment, an arc is generated between the wire 81 and the workpiece W1 when the arc processing system A1 is used. A current flows from the wire 81 via the arc to the member to be processed W1. The power source 5 allows a current to flow through the wire 81 only when the torch switch 4 is in the on state. In this embodiment, the wire 81 is fed by a feeding device (not shown) only when the torch switch 4 is in the on state.

  Next, the effect of this embodiment is demonstrated.

  In the present embodiment, the portion of the insertion member 1 that is surrounded by the gripping part 31 is composed of the non-heat generating portion 195. According to such a configuration, the first heat generating portion 191 and the second heat generating portion 192 are not arranged inside the gripping portion 31. Therefore, it is possible to suppress the heat generated in the first heat generating part 191 and the second heat generating part 192 from being transmitted to the grasping part 31. Thereby, at the time of use of arc processing system A1, it can control that outer surface 313 of grasping part 31 becomes too high temperature. As a result, the operator can perform arc processing (arc welding in the present embodiment) while holding the holding part 31 for a long time. Therefore, the arc process can be performed more efficiently.

  In the present embodiment, the conductor layer 142 has a conductor cylinder portion 142 </ b> A surrounded by the outer skin 143. The conductor extension 142B has a cylindrical shape with an inner diameter larger than the inner diameter of the conductor cylinder 142A. According to such a configuration, the area of the contact region between the conductor extension 142B and the conductive cylindrical body 15 can be increased. Thereby, the heat which generate | occur | produces in the contact area | region (1st heat-emitting part 191) of the conductor extension part 142B and the conductive cylindrical body 15 can be reduced. Thereby, when the arc processing system A1 is used, it is possible to further suppress the outer surface 313 of the gripping portion 31 from becoming excessively high temperature. Therefore, arc processing can be performed more efficiently for the same reason as described above.

  In the present embodiment, the body protrusion 121B is inserted into the base 150. According to such a configuration, the distance from the contact region (first heat generating portion 191) between the conductor extending portion 142B and the conductive cylindrical body 15 to the location (front opening 321) where the torch body 12 extends from the handle 3 is increased. It can be shortened. Thereby, the distance in planar view from the handle | steering-wheel 3 to the arc process location (this embodiment welding location) in the to-be-processed member W1 can be made small. This makes it easier for the operator to position the tip of the nozzle 11 at the arc processing location in the member W1. That is, it is easy for an operator to aim at an arc processing place in the member to be processed W1. As a result, the operability of the arc processing torch T1 for the operator can be improved. The improvement in operability of the arc processing torch T1 is suitable for reducing the fatigue of an operator who performs arc processing for a long time.

  In the present embodiment, the handle 3 includes a support portion 35 that supports the insertion member 1. The support portion 35 stands from the inner surface 314 toward the insertion member 1. According to such a configuration, the insertion member 1 can be held in a state of being separated from the inner surface 314 of the gripping part 31 in the gripping part 31 without increasing the contact area between the insertion member 1 and the handle 3. It becomes. Thereby, it can suppress that the heat which generate | occur | produced in the 1st heat generating part 191 and the 2nd heat generating part 192 is transmitted to the holding | grip site | part 31. FIG. Thereby, when the arc processing system A1 is used, it is possible to further suppress the outer surface 313 of the gripping portion 31 from becoming excessively high temperature. Therefore, arc processing can be performed more efficiently for the same reason as described above.

  In the present embodiment, the first support piece 351, the second support piece 352, and the third support piece 353 press the insertion member 1. The direction of the force that the first support piece 351 and the second support piece 352 give to the insertion member 1 is opposite to the direction of the force that the third support piece 353 gives to the insertion member 1. According to such a configuration, it is possible to prevent the insertion member 1 (the cable 14 in this embodiment) from coming off the handle 3.

  In the present embodiment, as shown in FIG. 3, the first traveling direction Y1, which is the traveling direction of the wire 81 located in the front opening 321, is inclined with respect to the virtual straight line L11. According to such a configuration, when the tip of the nozzle 11 is positioned at an arc processing position in the same processing target member W1, compared to the case where the first traveling direction Y1 is not inclined with respect to the virtual straight line L11, The elbow height of the operator from the processing member W1 can be reduced. FIG. 12 (a) shows a case where a conventional arc processing torch is used, and FIG. 12 (b) shows a case where the arc processing torch T1 of the present embodiment is used. The elbow height H2 shown in FIG. 5B is lower than the elbow height H1 shown in FIG. If the height of the worker's elbow can be reduced, the opening angle of the worker's side can be reduced, so that the worker's fatigue can be reduced.

  Further, according to the configuration of the present embodiment, when the operator holds the handle 3 so that the virtual straight line L11 coincides with the horizontal direction, the first traveling direction Y1 can be inclined downward in the gravitational direction with respect to the horizontal direction. It becomes possible. If the first advancing direction Y1 can be inclined downward in the direction of gravity with respect to the horizontal direction, even if the torch body 12 similar to the conventional one is used, the arc processing location on the member W1 to be processed from the handle 3. The distance in plan view up to (a welding spot in the present embodiment) can be reduced. Then, for the same reason as described above, it is possible to improve the operability of the arc processing torch T1 for the operator. The improvement in operability of the arc processing torch T1 is suitable for reducing the fatigue of an operator who performs arc processing for a long time. Alternatively, if the first traveling direction Y1 can be tilted downward in the direction of gravity with respect to the horizontal direction, the torch is used when the distance in plan view to the arc processing location in the member W1 to be processed is equivalent to the conventional one. The radius of curvature of the feeding path P1 of the wire 81 in the body 12 can be increased. This contributes to the reduction of the feeding resistance of the wire 81. Therefore, the quality of arc processing (in this embodiment, welding) can be improved.

  In the present embodiment, the second traveling direction Y2 that is the traveling direction of the wire 81 located in the rear opening 311 is inclined with respect to the virtual straight line L11. According to such a configuration, when the operator holds the handle 3 so that the virtual straight line L11 coincides with the horizontal direction, the second traveling direction Y2 can be inclined upward in the gravitational direction with respect to the horizontal direction. . Therefore, the insertion member 1 (in this embodiment, the cable 14) extending from the rear opening 311 can be hung downward in the gravity direction. As a result, the burden on the operator's hand, that is, the work weight can be reduced, and the worker's fatigue can be reduced.

  Further, according to the configuration of the present embodiment, the position of the center of gravity of the handle 3 can be positioned at the gripping portion 31. Therefore, the balance can be improved, the work weight can be reduced, and the operability can be improved.

  The wire 81 is inserted into the insertion member 1 from a wire reel (not shown) and fed to the member to be processed W1. Since the wire 81 is wound in a plurality of turns by the wire reel, the wire 81 inserted through the insertion member 1 is also formed with a bend. In the present embodiment, the feeding path P1 has a curved portion inside the handle 3. According to such a configuration, it is possible to make the feeding path P1 have a shape corresponding to the bending of the wire 81 as compared with the case where the feeding path P1 in the handle 3 is linear throughout. Therefore, the feeding resistance that can be received by the wire 81 in the handle 3 can be further reduced. Thereby, improvement of the quality of arc processing (welding in this embodiment) is realized.

  In the present embodiment, the first support piece 351 and the second support piece 352 are in contact with a portion of the insertion member 1 that is located on the first direction X1 side. The third support piece 353 is in contact with a portion of the insertion member 1 that is located on the second direction X2 side opposite to the first direction X1. Such a configuration is very suitable for maintaining the feeding path P1 of the wire 81 in the gripping part 31 in a curved state.

  In the present embodiment, the distal end portion 32 has a finger abutting surface 325 that abuts the operator's index finger or thumb. The finger contact surface 325 has a concave shape that is recessed toward the feeding path P <b> 1 of the wire 81. According to such a configuration, the contact area between the operator's index finger or thumb and the tip portion 32 can be improved. As a result, the operator's index finger and thumb can be fitted by the handle 3. Thereby, the gripping stability of the handle 3 is improved.

  In the present embodiment, the finger contact surface 325 has a concave shape extending intersecting the feeding path P1 of the wire 81 in a front view. According to such a configuration, the contact area between the operator's index finger and the tip portion 32 can be further improved. As a result, it is possible to further fit the operator's index finger to the handle 3. Thereby, the gripping stability of the handle 3 is improved.

  In the present embodiment, the gripping portion 31 has an outer surface 313 that faces outward of the handle 3. The outer surface 313 has a top 313A located on the outer surface 313 on the first direction X1 side. The top portion 313A has a curved shape that curves toward the first direction X1. According to such a configuration, the contact area between the palm of the operator and the grasping part 31 can be improved. As a result, the operator's palm can be fitted by the handle 3. Thereby, the gripping stability of the handle 3 is improved.

  In the present embodiment, the outer surface 313 has a bottom portion 313B located on the outer surface 313 on the second direction X2 side opposite to the first direction X1. A part of the contour of the bottom 313B has a radius of curvature of 280 to 310 mm in a front view. According to such a structure, the recessed part for hold | maintaining an operator's middle finger, a ring finger, etc. is not formed. Therefore, even if the size of the operator's hand is different, it is possible to fit the middle finger, the ring finger or the like to the gripping part 31. Thereby, the gripping stability of the handle 3 is improved.

  In the present embodiment, the gripping portion 31 has a second grip portion 317 for gripping with the operator's little finger. The second grip portion 317 is a portion having a shape that is smaller in diameter than the first grip portion 316. According to such a configuration, it is possible to grip the grasped portion 31 more strongly with the operator's little finger. Thereby, the gripping stability of the handle 3 is improved.

  In the present embodiment, the outer surface 313 has a plurality of strip-shaped portions 313E. Each of the plurality of strip-like portions 313E extends in the direction F1 along the feeding path P1. The plurality of strip-like portions 313E are arranged along the circumferential direction of the feeding path P1. A ridge line 313F is formed between two belt-like portions 313E adjacent to each other in the circumferential direction among the plurality of belt-like portions 313E. According to such a configuration, even when the operator holds the handle 3 for a long time, the handle 3 can be firmly held even if the grip strength of the operator is reduced.

Conventionally, the contact area between the operator's hand and the handle is about 4100 mm ² . On the other hand, in this embodiment, the contact area between the operator's hand and the handle 3 is, for example, about 8000 mm ^{2 to} 9000 mm ² .

Second Embodiment
A second 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. 13 is a sectional view showing an arc processing torch according to a second embodiment of the present invention.

  The arc processing torch T2 shown in the figure is the same as that in the above-described embodiment except that a vent hole 358 is formed in the support portion 35. The ventilation hole 358 connects the space outside the handle 3 and the space inside the handle 3. According to the present embodiment, in addition to the operational effects described in the first embodiment, the following operational effects are achieved.

  According to this embodiment, air can be circulated from the space inside the handle 3 to the space outside the handle 3 via the vent hole 358. Thereby, the heat of the insertion member 1 and the handle 3 can be released to the outside of the handle 3 more efficiently. Therefore, the configuration of the present embodiment is suitable for improving the cooling effect of the insertion member 1 and the handle 3.

  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-described example, the example in which the feeding path P1 is curved in the handle 3 is shown. However, the feeding path P1 is not curved in the handle 3 at all. Also good.

  In order to improve the feedability of the wire 81, the shape of the torch body 12 may be determined so as to draw a relaxation curve by combining a plurality of curvature radii and bending angles.

  A fine hole communicating with the space inside the handle 3 may be formed at any position of the handle 3. Thereby, the flow of the air which goes to the space inside the handle | steering_wheel 3 from the said fine hole can be produced | generated, and the handle | steering-wheel 3 and the insertion member 1 can be cooled.

  A component (for example, the conductive cylindrical body 15) through which an electric current flows may be supported by the support portion 35. Thereby, the contact area between the component through which the current flows and the handle 3 can be reduced, and the transfer of heat to the handle 3 can be suppressed.

DESCRIPTION OF SYMBOLS 1 Insertion member 11 Nozzle 12 Torch body 121 Body conductive part 121A Body main part 121B Body protrusion part 123 Body insulating part 14 Cable 141 Inner membrane 142 Conductive layer 142A Conductor cylinder part 142B Conductor extension part 143 Outer sheath 15 Conductive cylinder 150 Base 151 Front part 151A Extension piece 151S Slit 152 Rear part 16 Liner 181 First fixing member 182 Second fixing member 191 First heat generating part 192 Second heat generating part 195 Non-heat generating part 3 Handle 31 Holding part 311 Rear opening 313 External surface 313A Top part 313B Bottom portion 313E Strip portion 313F Ridge line 314 Inner surface 316 First grip portion 317 Second grip portion 32 Front end portion 321 Front opening 323 Switch hole 325 Finger contact surface 35 Support portion 351 First support piece 352 Second support piece 353 Third Support piece 358 Vent hole 4 Toe H switch 41 Switch lever 42 Tact switch 5 Power supply 81 Wire A1 Arc processing system F1 Direction F11 along feed path Feed direction front F12 Feed direction rear H1, H2 Height L11 Virtual straight line L21, L22 Path length L31 Size P1 Feed Supply path T1, T2 Arc processing torch W1 Processed member X1 First direction X2 Second direction Y1 First traveling direction Y2 Second traveling direction θ1, θ2, θ3 Inclination angle

Claims (12)

A handle,
An insertion member surrounded by the handle and allowing a wire to pass therethrough,
The handle includes a gripping part for an operator to grip, a tip part from which the insertion member extends, and a support part that supports the insertion member,
The tip portion is located on the front side in the feeding direction in the direction along the feeding path of the wire from the gripping portion,
The grip portion has an inner surface facing the side where the insertion member is located,
The arc support torch, wherein the support portion stands from the inner surface toward the insertion member. The grip portion has a first grip portion for gripping with the middle finger and ring finger of an operator,
The support portion includes a first support piece that supports the insertion member,
2. The arc processing torch according to claim 1, wherein the first support piece is located on the rear side in the feed direction opposite to the front in the feed direction with respect to the first grip portion.   3. The arc processing torch according to claim 2, wherein the support portion includes a second support piece positioned at a position overlapping the first grip portion in a direction along the feeding path.   The arc support torch according to claim 3, wherein the support portion includes a third support piece positioned between the first support piece and the second support piece in a direction along the feeding path. The first support piece, the second support piece, and the third support piece press the insertion member,
The direction of the force which the said 1st support piece and the said 2nd support piece give with respect to the said insertion member is a direction opposite to the direction of the force which the said 3rd support piece gives with respect to the said insertion member. The arc processing torch as described. Inside the gripping portion, the feeding path is curved in the first direction,
The arc processing torch according to claim 4 or 5, wherein the first direction is a direction orthogonal to a direction along the feeding path. The first support piece and the second support piece are in contact with a portion of the insertion member located on the first direction side,
The arc processing torch according to claim 6, wherein the third support piece is in contact with a portion of the insertion member that is located on a second direction side opposite to the first direction.   The arc processing torch according to claim 4, wherein the first support piece, the second support piece, and the third support piece stand upright from the inner surface.   The arc processing torch according to claim 1, wherein a vent hole that connects a space outside the handle and a space inside the handle is formed in the support portion. The insertion member includes a conductive cylindrical body and a cable through which a wire is inserted,
The cable has a conductor layer in contact with the conductive cylindrical body,
The arc processing torch according to claim 1, wherein the support portion is in contact with the cable. The cable includes an insulating outer shell that surrounds the conductor layer;
The arc processing torch according to claim 10, wherein the support portion is in contact with the outer skin. An arc processing torch according to any one of claims 1 to 11,
An arc processing system comprising: a power source for passing a current through a wire inserted through the insertion member.