welding torch

Abstract

The present invention provides a welding torch that has a configuration that allows a heat shield to be fixed to the torch body without compromising the design and grip of the torch body. [Solution] This welding torch 1 has a body 20, and both sides 20s of the body 20 located at one end of the body 20 are provided with a plurality of recesses 20z that are recessed inward of the body 20. The heat shield device 40 includes a heat shield plate 41 and a fixing bracket 42 that fixes the heat shield plate 41 to the body 20. The fixing bracket 42 has a pair of arms 42e that are positioned to sandwich both sides 20s of the body 20 from both sides, and the inner surface 42e1 of the pair of arms 42e facing the sides 20s has a convex portion 42p that protrudes toward the side 20s and fits into the recesses 20z, positioned opposite the recesses 20z.

Description

Technical Field

[0001] The present invention relates to a welding torch.

Background Art

[0002] For example, Patent Document 1 and Patent Document 2 disclose a configuration in which a heat shield device is provided in a welding torch to block radiant heat from a welding part that generates high heat by an arc and prevent the high heat from propagating to the operator's hand.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] The heat shield device disclosed in Patent Document 2 discloses a structure in which the heat shield device is fixed to the torch body by engaging a hole or a recess provided in the heat shield device with a convex portion provided on the torch body.

[0005] In the heat shield device disclosed in Patent Document 2, it is necessary to provide a convex portion for fixing the heat shield device to the torch body. Therefore, there is a risk of impairing the designability and grip of the grip of the torch body.

[0006] This disclosure aims to solve the above problems and provides a welding torch having a configuration capable of fixing a heat shield device to a torch body without impairing the designability and grip of the grip of the torch body.

Means for Solving the Problems

[0007] [1] The welding torch of the present disclosure comprises a cylindrical main body portion that extends in one direction and is held by the operator, a torch body provided on one end of the main body portion, a power cable provided on the other end of the main body portion, a torch switch provided near the one end of the main body portion for controlling the power supply to the torch body, and a heat shield device fixed to the one end of the main body portion, wherein the one end is the front side, the other end is the rear side, the side on which the torch switch is provided is the bottom side, and the side opposite to the torch switch is the top side. In this case, one or more recesses are provided on both sides of the main body located on one end of the main body, and the heat shielding device includes a heat shield plate and a fixing bracket for fixing the heat shield plate to the main body, the fixing bracket having a pair of arms that are arranged to sandwich the sides of the main body from both sides, and on the inner surfaces of the pair of arms facing the sides, there are protrusions that project toward the sides and fit into the recesses, at positions facing the recesses.

[0008] [2] The welding torch according to [1], wherein the recesses provided on the side surface are located in front of the front part of the torch switch, and two are provided in the vertical direction on one side surface and two on the other side surface, and the protrusions provided on the arm are also provided in the vertical direction on one arm and two on the other arm.

[0009] [3] The welding torch according to [1] or [2], wherein the main body includes a pair of split housings that can be divided into two in the lateral direction, and at least one end of the main body is provided with a through hole for passing a bolt through in order to fasten the pair of split housings together with a bolt from the lateral direction, and a recess is provided around the through hole that is recessed inward of the main body. [Effects of the Invention]

[0010] The welding torch of this disclosure provides a welding torch that has a configuration that allows a heat shield to be fixed to the torch body without impairing the design and grip of the torch body. [Brief explanation of the drawing]

[0011] [Figure 1] This is a first perspective view showing the overall configuration of the welding torch according to the embodiment. [Figure 2] This is a second perspective view showing the overall configuration of the welding torch according to the embodiment. [Figure 3] This is a side view showing the overall configuration of the welding torch according to the embodiment. [Figure 4] This is a first perspective view showing the overall configuration of a welding torch with the heat shield device of the embodiment removed. [Figure 5] This is a second perspective view showing the overall configuration of the welding torch with the heat shield device of the embodiment removed. [Figure 6] This is a first perspective view showing the configuration of the heat shielding device according to the embodiment. [Figure 7] This is a second perspective view showing the configuration of the heat shielding device according to the embodiment. [Modes for carrying out the invention]

[0012] The welding torch of this embodiment will be described below with reference to the drawings. In the embodiments described below, when referring to the number, quantity, etc., the scope of the present invention is not necessarily limited to that number, quantity, etc., unless otherwise specified. The same reference numeral will be used for the same part or equivalent part, and redundant descriptions may not be repeated. It is intended from the outset that the configurations in the embodiments will be used in appropriate combinations.

[0013] (Welding torch 1) Referring to FIGS. 1 to 5, the structure of the welding torch 1 of the present embodiment will be described. The welding torch 1 is provided so as to extend in one direction, and includes a cylindrical main body 20 that is gripped by an operator, a torch main body T provided at one end side of the main body 20, and a power cable PC provided at the other end side of the main body 20. For convenience of explanation, the side where the torch main body T is provided with respect to the main body 20 is referred to as the front side, and the side where the power cable PC is provided is referred to as the rear side. The side where the torch main body T inclines is referred to as the lower side, and the opposite side is referred to as the upper side. The left side when viewing the torch main body T from the main body 20 is referred to as the left side, and the right side is referred to as the right side. The left and right sides of the main body 20 may be referred to as the side surfaces.

[0014] A torch switch 30 for controlling the power supply from the power cable PC to the torch main body T is provided near the front side of the lower side of the main body 20. When the operator pulls (operates) this torch switch 30, power is supplied to the torch main body T and welding becomes possible.

[0015] The torch switch 30 has an outer surface shape that gradually protrudes downward toward the rear, and the operator uses the index finger, or the index finger and the middle finger, to pull (operate) the torch switch 30.

[0016] A grip 21 that is curved and recessed upward is provided near the rear side of the lower side of the main body 20. A plurality of arc-shaped convex portions 23 are provided on the grip 21 so as to wrap around the grip 21 as an anti-slip measure.

[0017] A heat shield device 40 for blocking the radiant heat from the welding part that generates high heat by the arc and preventing the high heat from being transmitted to the operator's hand is attached to one end side (front side) of the main body 20.

[0018] (Structure of the main body 20) The main body 20 of the present embodiment includes a pair of divided housings 20p that can be divided into two in the side direction. At one end side of the main body 20, in order to maintain the pair of divided housings 20p in a joined state, a plurality of front through-holes 20a for passing a bolt B1 from the side direction are provided.

[0019] Specifically, on one side surface 20s of the divided housing 20p, two front through-holes 20a are provided in the vertical direction, located in front of the front side portion 30s of the torch switch 30. Similarly, on the other side surface 20s of the divided housing 20p, two front through-holes 20a are provided in the vertical direction at the same position. Around the front through-hole 20a, a recess 20z that is recessed in the inner direction of the main body 20 is provided to easily pass the bolt B1 and accommodate the bolt head and nut N1 of the bolt B1.

[0020] By passing the bolt B1 through from one side of the front through-hole 20a, arranging the nut N1 on the other side, and fastening the bolt B1 and the nut N1, the front side of the pair of divided housings 20p can be fixed.

[0021] Furthermore, on one side surface 20s of the divided housing 20p, two rear through-holes 20b are provided in the vertical direction, located behind the rear side portion 21S of the grip 21. Similarly, on the other side surface 20s of the divided housing 20p, two rear through-holes 20b are provided in the vertical direction at the same position. Around the rear through-hole 20b, a recess 20z that is recessed in the inner direction of the main body 20 is provided to easily pass the bolt B1 and accommodate the bolt head and nut N1 of the bolt B1.

[0022] By passing the bolt B1 through from one side of the rear through-hole 20b, arranging the nut on the other side, and fastening the bolt B1 and the nut N1, the rear side of the pair of divided housings 20p can be fixed.

[0023] In the illustration, the recess 20z has a form that constitutes a part of a cylindrical shape. However, for example, by making it hexagonal, a function of preventing the nut N1 from rotating can be added.

[0024] (Heat shielding device 40) The configuration of the heat shielding device 40 will be described with reference to Figures 6 and 7. The heat shielding device 40 includes a heat shielding plate 41 and a fixing bracket 42 for fixing the heat shielding plate 41 to the main body 20.

[0025] The heat shield plate 41 includes a central plate 41a and a pair of side plates 41b located on both sides of the central plate 41a. The side plates 41b are positioned to be inclined rearward relative to the central plate 41a. The heat shield plate 41 may be formed by bending a single metal plate to create the central plate 41a and the side plates 41b, or it may be configured by joining the central plate 41a and the side plates 41b with another metal plate.

[0026] The fixing bracket 42 includes a pair of arms 42e that are positioned to sandwich the sides 20s of the main body 20 from both sides.

[0027] The pair of arms 42e have a substantially L-shape in side view and are symmetrical. The pair of arms 42e are provided so as to extend from both ends of the base portion 42b. The pair of arms 42e and the base portion 42b may be formed by bending a single metal plate, or the pair of arms 42e and the base portion 42b may be connected by another metal plate.

[0028] Bolt holes (not shown) are provided in the central plate 41a and the base portion 42b, and a pair of arm portions 42e are fixed to a predetermined position on the heat shield plate 41 by bolts B2 and nuts N2. By using elongated holes or the like for the bolt holes (not shown), the position of the pair of arm portions 42e relative to the heat shield plate 41 can also be adjusted.

[0029] On the inner surface 42e1 of a pair of arm portions 42e facing the side surface 20s, there are protrusions 42p that project toward the side surface 20s and fit into the recess 20z described above, and are provided at a position opposite to the recess 20z. Two protrusions 42p are provided on one arm portion 42e. The protrusions 42p are made of cylindrical metal parts and are fixed to the arm portion 42e using fixing members such as eyelets H1.

[0030] (Attachment of the heat shielding device 40 to the main body 20) Referring again to Figures 1 and 2, the attachment of the heat shield device 40 to the main body 20 will be described. The recesses 20z provided on the left and right sides and top and bottom of the front side function as recesses for attaching the heat shield device 40. The protrusions 42p provided on the inner surface 42e1 of the arm portion 42e fit into the recesses 20z of the front through hole 20a.

[0031] At this point, the pair of arms 42e are temporarily spread out to the sides, and the recess 20z is fitted into the protrusion 42p. After this operation, an elastic force is generated in the arms 42e based on the elastic force of the arms 42e, which grips the main body 20. As a result, the state in which the protrusion 42p is fitted into the recess 20z is maintained.

[0032] In this way, by using the recess 20z to fix the heat shield 40, it is not necessary to provide a separate recess in the main body 20 for fitting the protrusion 42p. As a result, the design and gripping ability of the grip 21 of the main body 20 are not compromised.

[0033] Furthermore, since the recess 20z is located in front of the front part 30s of the torch switch 30, it does not adversely affect the operability of the torch switch 30.

[0034] Furthermore, since there are two recesses 20z in the vertical direction, it is possible to suppress the rotation of the heat shielding device 40 in the front-to-back direction.

[0035] In the above embodiment, the recess 20z of the pre-prepared front through-hole 20a is used as the hole into which the protrusion 42p of the heat shield device 40 fits, but the embodiment is not limited to this. A dedicated hole into which the protrusion 42p of the heat shield device 40 fits may be provided in the vicinity of the recess 20z of the front through-hole 20a.

[0036] Furthermore, by changing the shape of the recess 20z from cylindrical to a hexagonal prism, and also changing the shape of the protrusion 42p from cylindrical to a hexagonal prism, the protrusion 42p can be given a function to prevent rotation. As a result, it is possible to adopt a configuration in which one recess 20z is provided on each side 20s without providing two protrusions 42p in the vertical direction.

[0037] Although a welding torch has been described in the embodiments above, the embodiments disclosed herein are illustrative in all respects and are not restrictive. The scope of the present invention is indicated by the claims, and all modifications are made within the meaning and scope of equivalents of the claims. [Explanation of Symbols]

[0038] 1 Welding torch, 20 Main body, 20a Front through hole, 20b Rear through hole, 20p Split housing, 20s Side, 20z Recess, 21 Grip, 21S Rear grip, 23 Arc-shaped protrusion, 42p Protrusion, 30 Torch switch, 30s Front, 40 Heat shield, 41 Heat shield plate, 41a Center plate, 41b Side plate, 42 Fixing bracket, 42b Base, 42e1 Inner surface, 42e Arm.

Claims

1. It is provided to extend in one direction and has a cylindrical main body that is grasped by the worker, A torch body provided on one end of the main body, A power cable provided on the other end of the main body, A torch switch is provided at a position near one end of the main body for controlling the power supply to the torch body, A heat shielding device fixed to one end of the main body, Equipped with, When one end is considered the front, the other end the rear, the side on which the torch switch is installed is considered the bottom, and the side opposite the torch switch is considered the top, Both sides of the main body located on one end of the main body are provided with one or more recesses that are recessed inward from the main body. The aforementioned heat shielding device is It includes a heat shield plate and a fixing bracket for fixing the heat shield plate to the main body, The aforementioned fixing bracket is A pair of arms are positioned to sandwich both sides of the main body from both sides, On the inner surfaces of the pair of arms facing the side surfaces, there are protrusions that project toward the side surfaces and fit into the recesses, positioned opposite the recesses. Welding torch.

2. The recess provided on the side surface is Located in front of the front part of the torch switch, Two are provided in the vertical direction on one side surface, and two are provided in the vertical direction on the other side surface. The protrusions provided on the arm portion are also provided in two in the vertical direction on one arm portion and two in the vertical direction on the other arm portion. The welding torch according to claim 1.

3. The main body includes a pair of divisible housings that can be divided into two parts in the lateral direction. At least one end of the main body is provided with through holes for fastening the pair of divided housings together with bolts from the side, so as to allow the bolts to pass through. The area surrounding the through hole is provided with the recess that is recessed inward in the main body. The welding torch according to claim 1.

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