Wire Feeder

Abstract

To provide a wire feeder which facilitates attachment of an optional component or the like, while achieving downsizing.SOLUTION: A wire feeder comprises: a wire feeding mechanism including a driving part and a motor; a metal structure 2 for supporting the motor; and a case 1 for accommodating the metal structure 2 and the wire feeding mechanism. The case 1 includes a first lateral wall and a second lateral wall 13 which are disposed separated on one side and the other side in a first direction orthogonal to a feeding direction X. The metal structure 2 includes walls 21, 22 separately disposed on a feeding direction front side X1 and a feeding direction rear side X2, and a wall 23 continuous with both walls. At least a part of the motor is disposed in a space area of the inside surrounded by the walls 21-23. At least one of the first wall and the second wall 13 is provided with a plurality of screw holes 7 for component attachment. At least one of the plurality of screw holes 7 is not overlapped with any of the walls 21-23 and the motor when viewed in the first direction.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a wire feeding device.

Background Art

[0002] In consumable electrode gas shielded arc welding, automatic welding using a welding robot or a traveling carriage, and semi-automatic welding operated by an operator are adopted. During welding operations such as these automatic weldings, a welding wire is fed out toward the welding torch by a wire feeding device, and power and shielding gas are supplied to the welding torch. The welding power is supplied to the welding torch from, for example, a welding power source via a power cable and a conduit cable. Inside the wire feeding device, a power supply cable and a power supply conductor are arranged as a path for flowing a welding current, and the welding power is supplied to the welding torch via the power supply conductor or the like (see, for example, Patent Document 1). In the welding device described in Patent Document 1, the welding torch is a so-called water-cooled torch, and cooling water (coolant) is supplied to the welding torch. As shown in FIGS. 5 to 7 and the like of Patent Document 1, a gas pipe and a water-cooled hose are also arranged inside the wire feeding device.

[0003] In the configuration in which the power supply conductor, the gas pipe, and the water-cooling hose are respectively arranged inside the wire feeding device in this way, the structure for arranging these inside becomes complicated, which is a factor leading to an increase in the size of the wire feeding device. Further, the wire feeding device (4) described in Patent Document 1 (see FIGS. 5 and 6 of the same document) is a so-called pull-side feeding device. Depending on the site where welding work is performed, the work area may be relatively large. In such a case, during welding work, it is necessary to handle a torch cable, a welding torch, and an intermediate cable connected to the pull-side feeding device together with the pull-side feeding device in correspondence with the welding location. At the site of such welding work, there has been a need to attach and use separate parts (optional parts) or the like in order to facilitate the transportation etc. of the pull-side feeding device (wire feeding device).

Prior Art Documents

Patent Documents

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2019-188428 [Summary of the Invention] [Problems to be Solved by the Invention]

[0005] The present invention has been conceived under such circumstances, and the main problem is to provide a wire feeding device that can be miniaturized and easily attach option parts and the like. [Means for Solving the Problems]

[0006] In order to solve the above problems, the present invention employs the following technical means.

[0007] The wire feeding device provided by the present invention includes a drive unit and a motor for driving the drive unit, a wire feeding mechanism for feeding a welding wire, a metal structure for supporting the motor, and a case for housing the metal structure and the wire feeding mechanism. The case includes a first side wall and a second side wall spaced apart from each other on one side and the other side in a first direction orthogonal to the feeding direction of the welding wire. The metal structure includes a first wall portion and a second wall portion spaced apart from each other on one side and the other side in the feeding direction, and a third wall portion connected to both the first wall portion and the second wall portion. At least a part of the motor is disposed in an inner space region surrounded by the first wall portion, the second wall portion, and the third wall portion. At least one of the first side wall and the second side wall is provided with a plurality of screw hole portions for attaching parts, and at least one of the plurality of screw hole portions does not overlap with any of the first wall portion, the second wall portion, the third wall portion, and the motor when viewed in the first direction.

[0008] In a preferred embodiment, the plurality of screw holes include a first screw hole located on one side of the feeding direction with respect to the motor, and a second screw hole located on the other side of the feeding direction with respect to the motor.

[0009] In a preferred embodiment, the first screw hole and the second screw hole are provided on each of the first side wall and the second side wall.

[0010] In a preferred embodiment, each of the plurality of screw holes is constituted by an insert nut embedded in the case.

[0011] In a preferred embodiment, the first wall portion and the second wall portion overlap each other when viewed in the feeding direction, and the third wall portion is connected to each of the first wall portion and the second wall portion at a position biased to one side in the first direction.

[0012] In a preferred embodiment, the constituent material of the welding relay includes aluminum.

Advantages of the Invention

[0013] In the wire feeding device according to the present invention, a plurality of screw holes for component mounting are provided on at least one of the first side wall and the second side wall that are spaced apart on one side and the other side in the first direction. At least one of the plurality of screw holes does not overlap with any of the first wall portion, the second wall portion, the third wall portion, and the motor when viewed in the first direction. According to such a configuration, optional components or the like, which are separate components, can be easily attached to and used with the wire feeding device as needed. Further, at least one of the plurality of screw holes does not overlap with any of the first wall portion, the second wall portion, the third wall portion, and the motor when viewed in the first direction, and is arranged at a position avoiding these. Thereby, it is possible to avoid an increase in the size of the case by providing the first screw hole, and to appropriately attach a separate component to the wire feeding device.

[0014] Other features and advantages of the present invention will become more apparent from the following detailed description with reference to the accompanying drawings.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0016] Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

[0017] In the present invention, terms such as "first", "second", "third", etc. are merely used as labels and are not necessarily intended to assign an order to those objects. Also, "a certain object A overlaps when viewed in a certain direction with respect to a certain object B" includes, unless otherwise specified, "a certain object A overlapping all of a certain object B" and "a certain object A overlapping a part of a certain object B".

[0018] FIG. 1 is a perspective view showing an example of a wire feeding device according to the present invention. Although detailed illustration description is omitted, the wire feeding device A1 feeds a welding wire to a welding torch (not shown), and is a so-called pull-side feeding device. The welding wire is guided to the tip of the welding torch through the inside of a torch cable connected to the wire feeding device A1 and a liner provided inside the welding torch (both not shown). In FIG. 1, the left side is the front in the feeding direction X of the welding wire (hereinafter, appropriately referred to as "front X1 in the feeding direction"), and the right side is the rear in the feeding direction X of the welding wire (hereinafter, appropriately referred to as "rear X2 in the feeding direction"). To the rear X2 in the feeding direction of the wire feeding device A1, for example, an intermediate cable, a wire feeding device (push-side feeding device), and a welding power source device (all not shown) are connected. The wire feeding device A1 of the present embodiment is used for so-called semi-automatic welding in which, for example, an operator operates the welding torch. In the description of the wire feeding device A1 shown in FIGS. 1 to 4, the vertical direction is defined based on the normal use posture. The above feeding direction X is a direction substantially along the horizontal plane.

[0019] The wire feeding device A1 shown in FIGS. 1 to 5 includes a case 1, a metal structure 2, a wire feeding mechanism 3, a handle 4, a cover 6, and a plurality of screw hole portions 7. The case 1 is formed in a cylindrical shape extending in the feeding direction X as a whole, and houses the metal structure 2 and the wire feeding mechanism 3. The case 1 is composed of a pair of dividable divided pieces (lower case 1A and upper case 1B). As shown in FIG. 3, the lower case 1A and the upper case 1B constituting the case 1 can be divided in the vertical direction (second direction Z) perpendicular to the feeding direction X. These lower case 1A and upper case 1B are connected by appropriate means such as screwing in a combined state. As shown in FIG. 5, the case 1 has a substantially rectangular cross section in its main part. The case 1 (lower case 1A and upper case 1B) is made of a material having electrical insulation properties. Examples of the material constituting the case 1 include synthetic resin materials such as polyamide resin (with glass fiber). However, the material constituting the case 1 (lower case 1A and upper case 1B) is not limited to synthetic resin.

[0020] Case 1 has a bottom wall 11, a first side wall 12, a second side wall 13, and a ceiling wall 14, each generally extending in the feeding direction X. The bottom wall 11 is the lowest - positioned part in Case 1. In the present embodiment, the part of the bottom wall 11 closer to the rear X2 in the feeding direction is inclined so as to be displaced upward as it goes toward the rear X2 in the feeding direction. The first side wall 12 stands up from one side (hereinafter, appropriately referred to as "the first - direction one - side Y1") end of the first direction Y (a horizontal direction perpendicular to the feeding direction X) orthogonal to the feeding direction X and extends upward. The second side wall 13 stands up from the other side (hereinafter, appropriately referred to as "the first - direction other - side Y2") end of the first direction Y and extends upward. The ceiling wall 14 is a part that covers the upper ends of the first side wall 12 and the second side wall 13. The lower case 1A includes the bottom wall 11 and parts of the first side wall 12 and the second side wall 13. The upper case 1B includes the ceiling wall 14 and parts of the first side wall 12 and the second side wall 13.

[0021] In the present embodiment, an opening - closing door 15 is provided on the case 1 (upper case 1B). The opening - closing door 15 is provided across the first side wall 12, the ceiling wall 14, and the second side wall 13, and is opened, for example, when maintaining the wire feeding mechanism 3 disposed inside the case 1. Also, as shown in FIGS. 1, 3, etc., an operation unit 141 is provided at the top of the case 1 (upper case 1B) closer to the rear X2 in the feeding direction. The operation unit 141 is for setting welding conditions such as welding current, welding voltage, and the feeding speed of the welding wire. The operation unit 141 is composed of, for example, a plurality of operation buttons. Based on the operation of the operation unit 141, various welding conditions are controlled. A display unit 142 is provided near the operation unit 141. The display unit 142 displays welding conditions and the like, and is composed of, for example, a display such as an organic EL or a liquid crystal.

[0022] The metal structure 2 is composed of a metal conductor and is a member for passing a welding current. As shown in FIGS. 6 to 9, the metal structure 2 is a block-shaped member. In the present embodiment, the metal structure 2 includes, for example, a first wall portion 21, a second wall portion 22, a third wall portion 23, an opening 24, a first extending portion 25, and a second extending portion 26. The first wall portion 21 and the second wall portion 22 are spaced apart in the forward X1 and rearward X2 directions of the feeding direction. The first wall portion 21 and the second wall portion 22 overlap each other when viewed in the feeding direction X. The third wall portion 23 is connected to both the first wall portion 21 and the second wall portion 22 and extends in the feeding direction X. The third wall portion 23 is connected to each of the first wall portion 21 and the second wall portion 22 at a position biased toward one side Y1 in the first direction. As shown in FIG. 5, the third wall portion 23 has a rectangular cross-section. The third wall portion 23 has a recess 231 and a through-hole 232. The recess 231 is a portion recessed downward in the second direction Z (vertical direction) with respect to the first wall portion 21 and the second wall portion 22. The through-hole 232 is formed in the upper portion of the third wall portion 23 and penetrates in the first direction Y. The opening 24 is a portion that opens to the other side Y2 in the first direction with respect to the third wall portion 23 and overlaps the third wall portion 23 when viewed in the first direction Y. The first extending portion 25 is connected to the upper part of the second wall portion 22 and extends in the rearward X2 direction of the feeding direction. The second extending portion 26 is connected to the lower part of the first wall portion 21 and extends in the feeding direction X.

[0023] As shown in FIG. 9, in the present embodiment, the metal structure 2 includes a gas passage 27 and a coolant passage 28. The gas passage 27 is a hollow passage for flowing gas, and in this embodiment, it is a passage for flowing shield gas. The gas passage 27 is formed across the first wall portion 21, the second wall portion 22, the third wall portion 23, and the first extending portion 25. The gas passage 27 has a first opening 27a and a second opening 27b. The first opening 27a is provided at one end of the gas passage 27 and is located at the forward X1 (one side of the feeding direction) end of the feeding direction. The second opening 27b is provided at the other end of the gas passage 27 and is located at the rearward X2 (the other side of the feeding direction) end.

[0024] The coolant passage 28 is a hollow passage for flowing coolant, and in this embodiment, it is a passage for flowing water (cooling water) as the coolant. The coolant passage 28 is formed across the first wall portion 21, the second wall portion 22, the third wall portion 23, the first extension portion 25, and the second extension portion 26. Further, two coolant passages 28 are formed in the metal structure 2. One coolant passage 28 is a water supply passage for sending cooling water to the welding torch, and the other one is a water return passage for passing the water returning from the welding torch.

[0025] The coolant passage 28 has a third opening 28a and a fourth opening 28b. The third opening 28a is provided at one end of the coolant passage 28 and is located at the front end X1 (one side of the feeding direction) in the feeding direction. The fourth opening 28b is provided at the other end of the coolant passage 28 and is located at the rear end X2 (the other side of the feeding direction) in the feeding direction. The gas passage 27 and the coolant passage 28 are each formed by connecting circular cross-section holes formed at appropriate positions of the metal structure 2.

[0026] In this embodiment, as shown in FIG. 4 and the like, the metal structure 2 (the first wall portion 21, the second wall portion 22, and the first extension portion 25) is provided with a first wire insertion port 211 and a second wire insertion port 221. The first wire insertion port 211 is a through hole formed along the feeding direction X in the first wall portion 21 for passing the welding wire W, and the welding wire W can pass through the first wire insertion port 211. In the example shown in FIG. 4, a liner 81 is arranged in the first wire insertion port 211, and the welding wire W is inserted into the liner 81. The second wire insertion port 221 is a through hole formed along the feeding direction X in the second wall portion 22 and the first extension portion 25 for passing the welding wire W, and the welding wire W can pass through the second wire insertion port 221. In the example shown in FIG. 4, a liner 82 is arranged in the second wire insertion port 221, and the welding wire W is inserted into the liner 82.

[0027] The constituent material of the metal structure 2 includes, for example, aluminum. The metal structure 2 is composed of, for example, aluminum or an aluminum alloy. The metal structure 2 is formed, for example, by casting. However, the constituent material of the metal structure 2 is not particularly limited, and it may be, for example, copper, a copper alloy, or other metal conductors.

[0028] As shown in FIGS. 3 and 4, connectors 51 and 52 and a joint portion 53 are provided on the metal structure 2. The connector 51 is provided on the first wall portion 21. The connector 51 communicates with the first opening 27a (gas passage 27). A torch cable (not shown), for example, is connected to this connector 51. The connector 52 is provided on the first extension portion 25. The connector 52 communicates with the second opening 27b (gas passage 27) and the fourth opening 28b (coolant passage 28). An intermediate cable (not shown), for example, is connected to this connector 52. The joint portion 53 is provided near the lower part of the first wall portion 21. The joint portion 53 communicates with the third opening 28a (coolant passage 28). A water-cooling hose (not shown), for example, is connected to the joint portion 53.

[0029] The wire feeding mechanism 3 shown in FIGS. 3 to 5 and the like includes a driving unit 31 and a motor 32 that drives the driving unit 31. Although a detailed illustration description is omitted, the driving unit 31 has a feeding roller and a pressing roller that feed out while sandwiching the welding wire. Most of the motor 32 is covered by a motor cover 33. The motor cover 33 is composed of a pair of dividable divided pieces. The motor cover 33 is made of a material having electrical insulation properties, and is composed of, for example, a synthetic resin material. However, the material constituting the motor cover 33 is not limited to synthetic resin.

[0030] As can be understood from FIGS. 4, 7, 8, etc., at least a part of the motor 32 is disposed in a space region S1 surrounded by the first wall portion 21, the second wall portion 22, and the third wall portion 23 when viewed in the second direction Z (vertical direction), and overlapping the third wall portion 23 when viewed in the first direction Y. That is, at least a part of the motor 32 is disposed in the inner space region S1 surrounded by the first wall portion 21, the second wall portion 22, and the third wall portion 23. In FIG. 7, for convenience of understanding, the wire feeding mechanism 3 is represented by a two-dot chain line. Further, in FIGS. 7 and 8, the space region S1 is hatched with a one-dot chain line.

[0031] In the present embodiment, the drive unit 31 is disposed on the motor 32. As can be understood from FIGS. 4, 7, 8, etc., the drive unit 31 is not disposed in the above-described space region S1. Although detailed illustration description is omitted, the motor 32 is fixed to the third wall portion 23 by appropriate means such as screw fastening. Thereby, the third wall portion 23 (metal structure 2) supports the motor 32.

[0032] The handle 4 is a portion that is gripped by hand when an operator carries the wire feeding device A1. The handle 4 is disposed at an upper portion near the rear X2 in the feeding direction of the case 1 (upper case 1B). The handle 4 is substantially U-shaped, and both end portions of the handle 4 are rotatably attached to the upper case 1B about an axis along the first direction Y. In FIGS. 1 to 4, the handle 4 is shown in a stored state. When gripping the handle 4, the handle 4 can be rotated about the above axis to an upright state.

[0033] The cover 6 is provided on the case 1 (lower case 1A) and covers at least a part of the bottom wall 11. In the present embodiment, the cover 6 includes a first cover 61 and a second cover 62. The first cover 61 is disposed at the end of the case 1 in the forward X1 direction of the feeding direction. The first cover 61 covers the end of the bottom wall 11 in the forward X1 direction of the feeding direction. Further, the first cover 61 overlaps the entire joint portion 53 when viewed in the first direction Y and covers the joint portion 53 in the first direction Y. The second cover 62 is disposed near the end of the case 1 in the rearward X2 direction of the feeding direction. The second cover 62 covers the vicinity of the end of the bottom wall 11 in the forward X1 direction of the feeding direction. By providing the cover 6 (the first cover 61 and the second cover 62) on the case 1 (lower case 1A), it is possible to prevent the outer surface of the lower case 1A (bottom wall 11) from directly contacting the work floor surface or the like, and the case 1 is protected.

[0034] The plurality of screw hole portions 7 shown in FIGS. 1 to 6 are for attaching separate parts to the wire feeding device A1. The plurality of screw hole portions 7 are provided on at least one of the first side wall 12 and the second side wall 13 of the case 1. At least one of the plurality of screw hole portions 7 does not overlap any of the first wall portion 21, the second wall portion 22, the third wall portion 23, and the motor 32 when viewed in the first direction Y.

[0035] In this embodiment, the plurality of screw holes 7 include a first screw hole 71 and a second screw hole 72. As shown in FIG. 4, the first screw hole 71 is located in front of the motor 32 in the feeding direction X1. The second screw hole 72 is located behind the motor 32 in the feeding direction X2. As shown in FIGS. 5 and 6, in this embodiment, in the wire feeding device A1, the first screw hole 71 and the second screw hole 72 are provided on each of the first side wall 12 and the second side wall 13. In the wire feeding device A1, two first screw holes 71 and two second screw holes 72 are provided. The first screw hole 71 and the second screw hole 72 are arranged near the lower part of the first side wall 12 and the second side wall 13. In the illustrated example, at least the second screw hole 72 does not overlap any of the first wall portion 21, the second wall portion 22, the third wall portion 23, and the motor 32 when viewed in the first direction Y. As shown in FIGS. 5 and 6, each of the plurality of screw holes 7 is constituted by, for example, an insert nut embedded in the case 1. According to the configuration including the plurality of screw holes 7 in this way, as shown in FIGS. 5 and 6, optional parts Op such as a guard member, which are separate parts, can be easily attached using the plurality of screw holes 7. In FIGS. 5 and 6, the optional part Op is represented by a two-dot chain line.

[0036] Next, the operation of this embodiment will be described.

[0037] The wire feeding device A1 of this embodiment includes a case 1, a metal structure 2, and a wire feeding mechanism 3. The wire feeding mechanism 3 includes a drive unit 31 and a motor 32. The metal structure 2 includes a first wall portion 21, a second wall portion 22, and a third wall portion 23. The first wall portion 21 and the second wall portion 22 are spaced apart in the forward X1 and rearward X2 directions of the feeding direction. The third wall portion 23 is connected to both the first wall portion 21 and the second wall portion 22. The metal structure 2 supports the motor 32. At least a part of the motor 32 is disposed in an inner space region S1 surrounded by the first wall portion 21, the second wall portion 22, and the third wall portion 23. The case 1 houses the metal structure 2 and the wire feeding mechanism 3. The case 1 includes a first side wall 12 and a second side wall 13. The first side wall 12 and the second side wall 13 are spaced apart on one side Y1 and the other side Y2 in the first direction. A plurality of screw hole portions 7 for attaching parts are provided on at least one of the first side wall 12 and the second side wall 13. At least one of the plurality of screw hole portions 7 does not overlap with any of the first wall portion 21, the second wall portion 22, the third wall portion 23, and the motor 32 when viewed in the first direction Y.

[0038] According to such a configuration, an optional part Op, which is a separate part, can be easily attached to the wire feeding device A1 and used as needed. Further, at least one of the plurality of screw hole portions 7 is disposed at a position avoiding overlap with any of the first wall portion 21, the second wall portion 22, the third wall portion 23, and the motor 32 when viewed in the first direction Y. Thereby, it is possible to avoid an increase in the size of the case 1 by providing the first screw hole portion 71 and appropriately attach a separate part to the wire feeding device A1.

[0039] In the wire feeding device A1, the plurality of screw hole portions 7 include a first screw hole portion 71 located in the forward X1 direction of the feeding direction with respect to the motor 32 and a second screw hole portion 72 located in the rearward X2 direction of the feeding direction with respect to the motor 32. According to such a configuration, an optional part Op (separate part) can be stably attached to the wire feeding device A1.

[0040] The first screw hole portion 71 and the second screw hole portion 72 are provided on each of the first side wall 12 and the second side wall 13 in the case 1. According to such a configuration, the optional component Op (separate component) can be more stably and evenly attached to the wire feeding device A1.

[0041] Each of the plurality of screw hole portions 7 (the first screw hole portion 71 and the second screw hole portion 72) is constituted by an insert nut embedded in the case 1. According to such a configuration, while reducing the size of the wire feeding device A1, the plurality of screw hole portions 7 can be appropriately arranged in the case 1.

[0042] In the metal structure 2, the first wall portion 21 and the second wall portion 22 overlap each other when viewed in the feeding direction X. The third wall portion 23 is connected to each of the first wall portion 21 and the second wall portion 22 at a position biased to one side Y1 in the first direction. According to such a configuration, the first wall portion 21, the second wall portion 22, and the third wall portion 23 are arranged at positions corresponding to three sides of a rectangle when viewed in the second direction Z. Further, the first wall portion 21, the second wall portion 22, and the third wall portion 23 are arranged asymmetrically in the left - right direction (the first direction Y) with respect to the center line along the feeding direction X when viewed in the second direction Z. Thereby, the motor 32 can be efficiently arranged in a space - saving manner in the inner space region S1 surrounded by the first wall portion 21, the second wall portion 22, and the third wall portion 23. Therefore, the strength of the metal structure 2 including the first wall portion 21, the second wall portion 22, and the third wall portion 23 is improved, and in the wire feeding device A1, the assembly and replacement of the metal structure 2 and the wire feeding mechanism 3 are easy, and the assemblability and maintainability are excellent.

[0043] The metal structure 2 is composed of a metal conductor and is a member through which a welding current flows. The metal structure 2 includes a gas passage 27 and a coolant passage 28. The gas passage 27 and the coolant passage 28 are formed across the first wall portion 21, the second wall portion 22, and the third wall portion 23. Thus, the metal structure 2 itself, which is the path of the welding current, has a hollow gas passage 27 and a coolant passage 28. According to the present embodiment, different from a configuration (for example, the configuration described in Patent Document 1) in which a power supply conductor, a gas pipe, and a water cooling hose are respectively arranged inside the wire feeding device, the paths for flowing the welding current, the shielding gas, and the cooling water can be covered by the metal structure 2. Thereby, in the wire feeding device A1 including the metal structure 2, the assembly and replacement of the metal structure 2 are easy, and it is excellent in assemblability and maintainability.

[0044] In the present embodiment, the constituent material of the metal structure 2 contains aluminum. Aluminum has a lower density than other metal conductors such as copper and iron, for example. According to such a configuration, the strength of the entire wire feeding device A1 can be increased, and the weight of the wire feeding device A1 can be reduced.

[0045] As described above, the embodiments of the present invention have been described. However, the scope of the present invention is not limited to the above-described embodiments, and all changes within the scope of the matters described in each claim are included in the scope of the present invention.

[0046] In the above embodiment, the case where the metal structure 2 includes both the gas passage 27 and the coolant passage 28 has been described. However, the present invention is not limited to this, and a configuration including only one of the gas passage 27 and the coolant passage 28 may be used. Further, a configuration in which the metal structure 2 does not include any of the gas passage 27 and the coolant passage 28 (fluid flow path) may also be used.

[0047] In the above-described embodiment, the metal structure 2 includes a first wall portion 21, a second wall portion 22, and a third wall portion 23 disposed at positions corresponding to three sides of a rectangle when viewed in the second direction Z, and is configured such that an opening 24 that opens to the other side Y2 in the first direction with respect to the third wall portion 23 is provided. However, the present invention is not limited to this. The metal structure 2 may be configured, for example, in a rectangular shape (annular shape) that is closed when viewed in the second direction Z without providing the opening 24, and the motor 32 may be disposed inside the annular shape.

Explanation of Reference Numerals

[0048] A1: Wire feeding device, 1: Case 1, 12: First side wall, 13: Second side wall, 2: Metal structure, 21: First wall portion, 22: Second wall portion, 23: Third wall portion, 3: Wire feeding mechanism, 31: Driving portion, 32: Motor, 7: Threaded hole portion, 71: First threaded hole portion, 72: Second threaded hole portion, S1: Space region, W: Welding wire, X: Feeding direction, X1: Front in the feeding direction (one side of the feeding direction), X2: Rear in the feeding direction (the other side of the feeding direction), Y: First direction, Y1: One side in the first direction, Y2: The other side in the first direction, Z: Second direction

Claims

Claim 1 A wire feeder for feeding a welding wire, including a driving unit and a motor for driving the driving unit, a metal structure for supporting the motor, and a case for housing the metal structure and the wire feeder mechanism, The case includes a first side wall and a second side wall spaced apart from each other on one side and the other side in a first direction orthogonal to the feeding direction of the welding wire, The metal structure includes a first wall portion and a second wall portion spaced apart from each other on one side and the other side in the feeding direction, and a third wall portion connected to both the first wall portion and the second wall portion, At least a part of the motor is disposed in an inner space region surrounded by the first wall portion, the second wall portion, and the third wall portion, At least one of the first side wall and the second side wall is provided with a plurality of screw hole portions for component mounting, At least one of the plurality of screw hole portions does not overlap with any of the first wall portion, the second wall portion, the third wall portion, and the motor when viewed in the first direction, a wire feeding device. Claim 2 The plurality of screw hole portions include a first screw hole portion located on one side in the feeding direction with respect to the motor and a second screw hole portion located on the other side in the feeding direction with respect to the motor, the wire feeding device according to claim 1. Claim 3 The first screw hole portion and the second screw hole portion are provided on each of the first side wall and the second side wall, the wire feeding device according to claim 2. Claim 4 Each of the plurality of screw hole portions is constituted by an insert nut embedded in the case, the wire feeding device according to any one of claims 1 to 3. Claim 5 The first wall portion and the second wall portion overlap each other when viewed in the feeding direction, The third wall portion is connected to each of the first wall portion and the second wall portion at a position biased to one side in the first direction, the wire feeding device according to any one of claims 1 to 4.

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