JP7238222B2 - wire feeder - Google Patents

Description

The present invention relates to a wire feeder.

In consumable electrode gas-shielded arc welding, automatic welding using welding robots and traveling carts, and semi-automatic welding methods operated by workers are adopted. During welding operations such as automatic welding, the wire feeding device feeds the welding wire toward the welding torch, and electric power and shielding gas are supplied to the welding torch.

For example, a wire feeder used in semi-automatic welding may have a relatively large work area depending on the site where the welding work is performed. When working inside a large structure, the working area is relatively large. At such a welding work site, there are many cavities and cables on the floor of the work site, and it is not suitable to attach wheels to the wire feeder for transportation. For this reason, it is necessary for the operator to manually carry the welding torch and the wire feeder depending on the location to be welded. A portable wire feeding device suitable for being carried by a worker is disclosed in Patent Document 1, for example.

A wire feeding device described in Patent Document 1 includes a box-shaped case and a wire feeding mechanism housed in the case. The case is made of, for example, a steel plate (made of steel) and has a rectangular parallelepiped shape. The wire feeding mechanism feeds the welding wire wound on the wire reel in the feeding direction along the longitudinal horizontal direction of the case. The ceiling wall of the case is provided with a handle for carrying by hand. At a welding job site where it is necessary to carry the wire feeder as described above, the wire feeder may be dragged around, for example via the cable of the welding torch, and used relatively randomly. The conventional steel box-shaped case described above is likely to be deformed by impact in such an environment. The conventional wire feeder described above has room for improvement in terms of durability depending on the environment of the welding work site.

JP-A-2006-7264

SUMMARY OF THE INVENTION The present invention has been conceived under such circumstances, and a main object of the present invention is to provide a wire feeder suitable for improving durability.

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

A wire feeding device provided by the present invention includes a wire feeding mechanism for feeding welding wire wound on a wire reel in a predetermined feeding direction, and a box-shaped case that houses the wire feeding mechanism. wherein the case is made of a metal material, and has a bottom wall and the bottom wall that is on the front side of the bottom wall in the feeding direction and perpendicular to the feeding direction. first and second front struts standing from one end side and the other end side in the width direction of the bottom wall, and one end side and the other end side of the bottom wall in the width direction on the rear side in the feeding direction on the bottom wall First and second rear struts upstanding from the sides, and a ceiling wall supported by the first and second front struts and the first and second rear struts and facing the bottom wall. a rectangular ring-shaped front panel made of resin material surrounding the front end of the case in the feeding direction; and a rectangular ring-shaped rear panel made of resin material surrounding the rear end of the case in the feeding direction. , is further provided.

In a preferred embodiment, the front panel encloses the front ends of the bottom wall and the top wall respectively in the feed direction and the first and second front struts, and the rear panel surrounds the bottom wall and the top wall. surrounding the feed direction rear end of each of the ceiling walls and the first and second rear struts;

In a preferred embodiment, the case includes: a first side wall covering a first opening surrounded by the bottom wall, the ceiling wall, the first front strut and the first rear strut; and the bottom wall. , the ceiling wall, a second side wall covering a second opening surrounded by the second front strut and the second rear strut, and the peripheral edge of the ceiling wall has a rectangular shape in a plan view. A seal member groove is formed therein and an annular ceiling seal member is mounted in the seal member groove and extends over the top of the first and second sidewalls, the top of the front panel and the rear panel. is pressed against the ceiling seal member.

In a preferred embodiment, first and second front sealing members are arranged respectively in a range from the ceiling wall to the bottom wall via the first and second front struts, and from the ceiling wall to the first first and second rear seal members respectively positioned through first and second rear struts to the bottom wall, wherein the first side wall is bounded by the first front seal member and the bottom wall; The first rear seal member is pressed entirely, and the second side wall is pressed entirely against the second front seal member and the second rear seal member.

In a preferred embodiment, at least one of the first and second side walls can be opened and closed.

In a preferred embodiment, the case includes a front beam portion having both ends connected to the first and second front struts and to which the ceiling wall is fixed, and a front beam portion having both ends connected to the first and second rear struts. a rear beam connected to and to which the ceiling wall is fixed.

In a preferred embodiment, the case includes a front wall arranged in an area surrounded by the bottom wall, the ceiling wall, and the first and second front struts when viewed in the feeding direction, The front wall is provided with a torch connection portion for connecting a welding torch, and a guard portion projecting forward in the feeding direction from the torch connection portion.

In a preferred embodiment, an insulating sheet is arranged on the inner surface of the case at a portion facing the wire reel and a portion facing the welding wire wound around the wire reel.

The wire feeder according to the present invention has a housing structure in which resin panels (front panel and rear panel) as strength members are incorporated at both ends of a skeleton structure made of a metal case. According to such a configuration, for example, by using a relatively thin steel plate or the like for the case, it is possible to reduce the weight and increase the strength of the entire housing. Both ends of the case in the feeding direction are surrounded by a rectangular annular front panel and a rear panel made of resin. This allows the front and rear panels to contact the work floor when the wire feeder is in use. According to such a configuration, the wire feeder can be easily dragged by sliding the resin front panel and the rear panel on the floor surface of the workplace. Therefore, it is suitable for use in a welding work site with a wide work area, and the durability of the wire feeder can be improved.

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

1 is a perspective view showing an example of a wire feeding device according to the present invention; FIG. It is the perspective view which looked at the wire feeding device shown in FIG. 1 from the back side. FIG. 2 is a plan view of the wire feeding device shown in FIG. 1; It is the figure which looked at the wire feeding device shown in FIG. 1 from the diagonally lower side of the feeding direction rear side. FIG. 2 is a perspective view showing a state in which first and second side walls, a front wall, a rear wall, a front panel and a rear panel are removed from the wire feeding device shown in FIG. 1; FIG. 6 is a perspective view in which the internal structure is further omitted from FIG. 5; It is the figure which looked at the structure shown in FIG. 6 from the feeding direction front side. It is the perspective view which looked at the structure shown in FIG. 6 from the back side. It is the figure which looked at the structure shown in FIG. 6 from the feeding direction rear side. FIG. 4 is an enlarged cross-sectional view of the main part taken along line XX of FIG. 3, omitting the internal structure; FIG. 4 is an enlarged cross-sectional view of a main part along XI-XI in FIG. 3, omitting the internal structure; FIG. 4 is an enlarged cross-sectional view of a main part taken along line XII-XII in FIG. 3, omitting the internal structure; FIG. 4 is an enlarged cross-sectional view of a main part taken along line XIII-XIII in FIG. 3, omitting the internal structure;

Preferred embodiments of the present invention will be specifically described below with reference to the drawings.

1 to 9 show an example of a wire feeder according to the invention. A wire feeder A1 of this embodiment feeds a welding wire to a welding torch (not shown). The wire feeding device A1 comprises a case 1, a front panel 3, a rear panel 4 and a wire feeding mechanism 6.

The case 1 has a substantially rectangular parallelepiped box shape. The longitudinal horizontal direction of the case 1 is parallel to the feeding direction X of the welding wire. 1 to 9, the front of the welding wire in the X feeding direction (hereinafter referred to as "forward in feeding direction X1") and the rear (hereinafter referred to as "rear in feeding direction X2") are appropriately distinguished. show. In the description of the illustrated wire feeder A1, the vertical direction is defined with reference to the posture normally used.

As shown in FIGS. 1-4, the case 1 comprises a bottom wall 11, a ceiling wall 12, a first side wall 13, a second side wall 14, a front wall 15 and a rear wall 17. As shown in FIGS. As shown in FIGS. 5-9, the case 1 also includes a first front strut 21, a second front strut 22, a first rear strut 23, a second rear strut 24, a front beam 25 and a rear beam. A portion 26 is provided. These elements constituting the case 1 are made of metal material, for example, steel plate.

The bottom wall 11 is the lowest portion of the case 1 . The bottom wall 11 has a long rectangular shape with the feed direction X as the longitudinal direction. A peripheral edge of the bottom wall 11 is formed as an extending portion 111 that bends and hangs down.

The first front strut 21 and the second front strut 22 are arranged at the forward X1 end of the bottom wall 11 in the feeding direction. The first front strut 21 and the second front strut 22 are spaced apart in the width direction Y of the bottom wall 11 (horizontal direction perpendicular to the feed direction X). The first front strut 21 extends upward from one end of the bottom wall 11 in the width direction Y (hereinafter referred to as "one width direction Y1"). The second front strut 22 extends upward from the other end of the bottom wall 11 in the width direction Y (hereinafter referred to as “the other width direction Y2” as appropriate). The lower end of each of the first front strut 21 and the second front strut 22 is fixed to the bottom wall 11 by appropriate means such as bolting.

The first rear strut 23 and the second rear strut 24 are arranged at the feeding direction rear X2 end of the bottom wall 11 . The first rear strut 23 and the second rear strut 24 are spaced apart in the width direction Y of the bottom wall 11 . The first rear strut 23 rises from one widthwise end Y1 of the bottom wall 11 and extends upward. The second rear strut 24 stands up from the other widthwise Y2 end of the bottom wall 11 and extends upward. The lower end of each of the first rear strut 23 and the second rear strut 24 is fixed to the bottom wall 11 by appropriate means such as bolting.

The ceiling wall 12 is supported by a first front strut 21 , a second front strut 22 , a first rear strut 23 and a second rear strut 24 and faces the bottom wall 11 . In this embodiment, as shown in FIGS. 7 and 11 , both ends of the front beam 25 are connected to the upper ends of the first front strut 21 and the second front strut 22 . Further, as shown in FIGS. 9 and 13 , both ends of a rear beam portion 26 are connected to upper end portions of the first rear strut 23 and the second rear strut 24 . The ceiling wall 12 is fixed to the front beam portion 25 and the rear beam portion 26 .

A handle 121 is provided at the center of the upper surface of the ceiling wall 12 . A sealing member groove 124 is formed in the peripheral portion of the ceiling wall 12 . The seal member groove 124 has a rectangular shape in plan view. The sealing member groove 124 is formed by appropriately bending the peripheral edge of the ceiling wall 12 and has a U-shaped cross section. A pair of hinge portions 122 and 123 are attached near the periphery of the ceiling wall 12 . The pair of hinge portions 122 are positioned at one end in the width direction Y1 and spaced apart in the feeding direction X. As shown in FIG. The pair of hinge portions 123 are positioned at the end portion of the other width direction Y2 and spaced apart in the feeding direction X. As shown in FIG.

The first side wall 13 is arranged at one end of the bottom wall 11 in the width direction Y1. A first side wall 13 covers a first opening 101 surrounded by a bottom wall 11 , a ceiling wall 12 , a first front strut 21 and a first rear strut 23 . An upper portion 131 of the first side wall 13 is connected to a pair of hinge portions 122 . The first side wall 13 is rotatable about an axis along the feed direction X at the upper portion 131 and can be opened and closed. A locking portion 132 is provided near the lower end of the first side wall 13 . The locking portion 132 can be operated from the outside to switch from a state of preventing the opening operation of the closed first side wall 13 to a state of permitting the opening operation.

The second side wall 14 is arranged at the other widthwise end Y2 of the bottom wall 11 . A second side wall 14 covers a second opening 102 bounded by the bottom wall 11 , the ceiling wall 12 , the second front strut 22 and the second rear strut 24 . An upper portion 141 of the second side wall 14 is connected to a pair of hinge portions 123 . The second side wall 14 is rotatable about an axis along the feeding direction X at the upper portion 141 and can be opened and closed. A locking portion 142 is provided near the lower end of the second side wall 14 . The locking portion 142 can be switched from a state of preventing the opening operation of the closed second side wall 14 to a state of allowing it by an operation from the outside.

As shown in FIG. 1, the front wall 15 is arranged on the front X1 side of the bottom wall 11 in the feeding direction. The front wall 15 is arranged in an area surrounded by the bottom wall 11 , the ceiling wall 12 , the first front strut 21 and the second front strut 22 when viewed in the feeding direction X. As shown in FIG. A torch connection portion 161 and a guard portion 162 are provided on the front wall 15 .

The torch connection part 161 is a part for connecting a welding torch (not shown). The torch connection portion 161 includes a connector projecting forward in the feeding direction X1 from the front wall 15, and the end of the cable of the welding torch is connected to the connector. The guard portion 162 protrudes forward in the feeding direction X1 from the front wall 15 . As shown in FIG. 3 , the guard portion 162 protrudes forward in the feed direction X1 from the torch connection portion 161 . In the present embodiment, the guard portions 162 are provided in pairs spaced apart in the width direction Y of the bottom wall 11 . The torch connecting portion 161 is positioned between the pair of guard portions 162 in the width direction Y of the bottom wall 11 . Each guard portion 162 is composed of a U-shaped bar, and both ends of the wire are attached to the front wall 15 to form an annular shape.

As shown in FIG. 2, the rear wall 17 is arranged on the rear X2 side of the bottom wall 11 in the feeding direction. The rear wall 17 is arranged in an area surrounded by the bottom wall 11 , the ceiling wall 12 , the first rear strut 23 and the second rear strut 24 when viewed in the feeding direction X. As shown in FIG. A through hole 171 is formed at an appropriate position of the rear wall 17 . A cable bundle C1 is pulled into the case 1 through the through hole 171. As shown in FIG. The cable bundle C1 is a cable aggregate in which, for example, power cables, gas hoses, and control cables (none of which are shown) are inserted.

In this embodiment, as shown in FIGS. 6 to 9, the case 1 includes a ceiling seal member 50, a first front seal member 51, a second front seal member 52, a first rear seal member 53 and a second seal member. Two rear seal members 54 are installed. As shown in FIGS. 10 to 13, the ceiling seal member 50 is mounted in the seal member groove 124 of the ceiling wall 12 . The ceiling seal member 50 is annular and has a rectangular cross section.

As shown in FIGS. 6, 7 and 11, the first front seal member 51 is arranged in a range from the ceiling wall 12 to the bottom wall 11 via the first front struts 21 . As shown in FIGS. 7, 8 and 11, the second front seal member 52 is arranged in a range from the ceiling wall 12 to the bottom wall 11 via the second front struts 22 . 6, 8, 9, and 13, the first rear seal member 53 and the second rear seal member 54 extend from the ceiling wall 12 to the first rear strut 23 and the second rear support. They are arranged in a range from the support 24 to the bottom wall 11 .

As shown in FIGS. 11 and 13 , when the first side wall 13 is closed, the upper portion 131 of the first side wall 13 is pressed against a part of the ceiling seal member 50 . In addition, the first side wall 13 is in pressure contact with the entire first front seal member 51 and the first rear seal member 53 when the first side wall 13 is closed.

When the second side wall 14 is closed, the upper portion 141 of the second side wall 14 is pressed against a portion of the ceiling seal member 50 . Also, in the closed state of the second side wall 14 , the second side wall 14 presses against the entirety of the second front seal member 52 and the second rear seal member 54 .

The front panel 3 is attached to the front X1 side of the case 1 in the feeding direction. The front panel 3 is made of resin material. The front panel 3 has a rectangular annular shape and surrounds the forward X1 end of the case 1 in the feeding direction. The front panel 3 includes a front bottom 31 , a front first side 32 , a front first side 32 and a top 34 .

The front bottom portion 31 surrounds the forward X1 end portion of the bottom wall 11 in the feeding direction and protrudes downward from the bottom wall 11 . As shown in FIGS. 4 and 10, the front bottom 31 has a bottom base 311 and a plurality of ribs 312 .

The bottom base portion 311 is spaced downward from the bottom wall 11 and extends in the width direction Y. As shown in FIG. The bottom base 311 has a plurality of bottom protrusions 313 . The plurality of bottom protruding portions 313 are arranged at intervals in the width direction Y. As shown in FIG. The bottom protruding portion 313 protrudes downward more than other portions.

A plurality of ribs 312 extend upwardly from the bottom base 311 and may abut the bottom wall 11 . The plurality of ribs 312 are arranged in the width direction Y at intervals. Each rib 312 has a plate-like shape extending along a plane defined by the feeding direction X and the vertical direction. Here, "the rib 312 can contact the bottom wall 11" includes a state in which the rib 312 contacts the bottom wall 11 and a state in which there is a slight gap between the rib 312 and the bottom wall 11. . In a state where there is a gap between the rib 312 and the bottom wall 11 , the rib 312 can come into contact with the bottom wall 11 due to elastic deformation due to the pressing load from the bottom base portion 311 side. The ribs 412 on the rear panel 4 described below are also capable of coming into contact with the bottom wall 11 .

As shown in FIGS. 1, 3 and 10, the front first side 32 surrounds the first front strut 21 . The front first side 32 has a plurality of first side protrusions 321 . The plurality of first side protrusions 321 are arranged at intervals in the vertical direction. Each first side projecting portion 321 projects further toward the one Y1 side in the width direction than other portions. In addition, each first side projecting portion 321 projects toward the one Y1 side in the width direction from the first side wall 13 .

As shown in FIGS. 2, 3 and 10, the forward second side 33 surrounds the second forward strut 22 . The front second side 33 has a plurality of second side protrusions 331 . The plurality of second side protrusions 331 are arranged at intervals in the vertical direction. Each second side projecting portion 331 projects further toward the other Y2 side in the width direction than other portions. Further, each of the second side protruding portions 331 protrudes from the second side wall 14 toward the other side in the width direction Y2.

The upper portion 34 surrounds the forward X1 end of the ceiling wall 12 in the feeding direction and protrudes upward from the ceiling wall 12 . The upper portion 34 partially covers the ceiling seal member 50 . Specifically, the upper portion 34 is in pressure contact with a portion of the ceiling seal member 50 that is not covered by the first side wall 13 and the second side wall 14 on the forward X1 side in the feeding direction.

The rear panel 4 is attached to the rear side X2 of the case 1 in the feeding direction. The rear panel 4 is made of resin material. The rear panel 4 has a rectangular annular shape and surrounds the rear X2 end of the case 1 in the feed direction. The rear panel 4 includes a rear bottom portion 41 , a rear first side portion 42 , a rear second side portion 43 and a top portion 44 .

The rear bottom portion 41 surrounds the feeding direction rear X2 end of the bottom wall 11 and protrudes downward from the bottom wall 11 . As shown in FIGS. 4 and 12, the rear bottom 41 has a bottom base 411 and a plurality of ribs 412 .

The bottom base 411 is spaced downward from the bottom wall 11 and extends in the width direction Y. As shown in FIG. The bottom base 411 has a plurality of bottom protrusions 413 . The plurality of bottom protruding portions 413 are arranged at intervals in the width direction Y. As shown in FIG. The bottom protruding portion 413 protrudes downward more than other portions.

A plurality of ribs 412 extend upwardly from the bottom base 411 and may abut the bottom wall 11 . The plurality of ribs 412 are arranged in the width direction Y at intervals. Each rib 412 has a plate-like shape extending along a plane defined by the feeding direction X and the vertical direction.

As shown in FIGS. 1, 3 and 12, the rear first side 42 surrounds the first rear strut 23 . The rear first side 42 has a plurality of first side projections 421 . The plurality of first side protruding portions 421 are arranged at intervals in the vertical direction. Each first side projecting portion 421 projects further toward the one Y1 side in the width direction than the other portions. Each first side protrusion 421 protrudes from the first side wall 13 toward the one Y1 side in the width direction.

As shown in FIGS. 2, 3 and 12, the rear second side 43 surrounds the second rear strut 24 . The rear second side portion 43 has a plurality of second side protrusions 431 . The plurality of second side protrusions 431 are arranged at intervals in the vertical direction. Each second side projecting portion 431 projects further toward the other Y2 side in the width direction than other portions. Each of the second side protruding portions 431 protrudes from the second side wall 14 toward the other Y2 side in the width direction.

The upper portion 44 surrounds the feeding direction rear X2 end of the ceiling wall 12 and protrudes upward from the ceiling wall 12 . The upper portion 44 partially covers the ceiling seal member 50 . Specifically, the upper portion 44 is in pressure contact with a portion of the ceiling seal member 50 that is not covered by the first side wall 13 and the second side wall 14 on the rear X2 side in the feed direction.

The rear panel 4 has the same structure as the front panel 3 described above. Front bottom 31 , front first side 32 , front first side 32 and top 34 in front panel 3 correspond to rear bottom 41 , rear second side 43 , rear first side 42 and rear panel 4 . They correspond respectively to the upper part 44 .

When attaching the front panel 3 and the rear panel 4 configured as described above to the case 1, they are brought close to the case 1 along the feeding direction X, and the front X1 end in the feeding direction and the rear X2 end in the feeding direction of the case 1 are attached. Attach to The front panel 3 (rear panel 4) is fixed to the case 1, for example, by bolts using mounting holes 301 (mounting holes 401) along the feed direction X formed at appropriate locations in the front panel 3 (rear panel 4). It is performed by fastening or the like (see FIGS. 10 and 12). Further, the front panel 3 and the rear panel 4 are formed with gaps in appropriate places, and are shaped so that the mold can be opened in the feed direction X during resin molding. As a result, the front panel 3 and the rear panel 4 have shapes that do not require undercuts, and can be easily molded with resin.

The wire feeding mechanism 6 shown in FIG. 5 feeds out the welding wire W1 wound on the wire reel 70 in the feeding direction X along the longitudinal horizontal direction of the case 1 . Although not shown, the wire feeding mechanism 6 includes, for example, a feeding roller and a pressure roller that sandwich the welding wire W1, and a feeding motor that rotates the feeding roller.

Wire reel 70 is supported by reel shaft 71 shown in FIG. The reel shaft 71 is fixed to a reel shaft mounting member 72 . The reel shaft mounting member 72 is made of steel plate, for example. The reel shaft mounting member 72 is fixed to the ceiling wall 12 and the bottom wall 11 by bending the upper and lower ends of the reel shaft mounting member 72 so that the mounting portion of the reel shaft 71 is aligned with the vertical plane.

In this embodiment, a wire reel cover 73 is arranged radially outward of the wire reel 70 . The wire reel cover 73 covers most of the outer circumference of the wire reel 70 except for a portion below the wire reel 70 . The wire reel cover 73 is made of an insulating material such as resin.

As shown in FIGS. 1, 5 and 6, insulating sheets 81 and 82 are arranged on the inner surface of the case 1 in this embodiment. The insulating sheet 81 is arranged on the inner surface of the bottom wall 11 and positioned below the wire reel 70 . Insulating sheet 81 faces welding wire W1 wound around wire reel 70 . An insulating sheet 82 is arranged on the inner surface of the first side wall 13 . The insulating sheet 82 faces the side surface of the wire reel 70 when the first side wall 13 is closed. 1 and 6, the insulating sheet 81 or the insulating sheet 82 is hatched.

Next, the operation of this embodiment will be described.

The wire feeder A1 is used, for example, for welding work inside a large structure. Welding operations inside large structures have a relatively large work area. At a welding work site with a wide work area, the wire feeder A1 is often carried around. Also, the wire feeder A1 may be dragged around, for example via the cable of the welding torch, and used relatively randomly.

In this embodiment, the case 1 housing the wire feeding mechanism 6 includes a bottom wall 11, a first front strut 21, a second front strut 22, a first rear strut 23, a second rear strut 24, and It has a ceiling wall 12 and has a box shape. Each of these elements constituting the case 1 is made of metal material. The front X1 end in the feed direction and the rear X2 end in the feed direction of the case 1 are surrounded by a rectangular ring-shaped front panel 3 and rear panel 4 made of a resin material.

As described above, the wire feeder A1 of this embodiment has a housing structure in which resin panels (the front panel 3 and the rear panel 4) as strength members are incorporated at both ends of the frame structure of the metal case 1. ing. With such a configuration, for example, the case 1 is made of a relatively thin steel plate or the like, so that the weight of the case 1 can be reduced, and at the same time, the overall strength of the case 1, the front panel 3, and the rear panel 4 can be increased. can.

Both ends of the case 1 in the feeding direction X are surrounded by a rectangular annular front panel 3 and a rear panel 4 made of resin. As a result, the front panel 3 and the rear panel 4 come into contact with the floor surface of the workplace when the wire feeder A1 is used. According to such a configuration, by sliding the front panel 3 and the rear panel 4 made of resin on the floor surface of the workplace, the wire feeding device A1 can be dragged and easily moved. Therefore, it is suitable for use in a welding work site with a wide work area, and the durability of the wire feeder A1 can be improved.

Even if the front panel 3 or the rear panel 4 that contacts the work floor is damaged, the damaged front panel 3 or the rear panel 4 can be replaced. Therefore, the durability of the case 1 made of metal material can be enhanced.

A seal member groove 124 having a rectangular shape in a plan view is formed in the peripheral portion of the ceiling wall 12 . An annular ceiling seal member 50 is mounted in the seal member groove 124 . The upper portion 131 of the first side wall 13 , the upper portion 141 of the second side wall 14 , the upper portion 34 of the front panel 3 , and the upper portion 44 of the rear panel 4 are pressed against the ceiling seal member 50 . According to such a configuration, the outer peripheral edge of the ceiling wall 12 is properly sealed by the cooperation of the first side wall 13, the second side wall 14, the front panel 3 and the rear panel 4, and the wire feeding device A1 Intrusion of moisture from above can be prevented.

In this embodiment, the wire feeder A1 comprises a first front seal member 51, a second front seal member 52, a first rear seal member 53 and a second rear seal member . The first front seal member 51 is arranged in a range from the ceiling wall 12 to the bottom wall 11 via the first front struts 21 . The second front seal member 52 is arranged in a range from the ceiling wall 12 to the bottom wall 11 via the second front struts 22 . The first rear seal member 53 and the second rear seal member 54 are arranged in a range extending from the ceiling wall 12 to the bottom wall 11 via the first rear struts 23 and the second rear struts 24, respectively. Also, the first side wall 13 presses the entirety of the first front seal member 51 and the first rear seal member 53, and the second side wall 14 covers the second front seal member 52 and the second rear seal member. The entire member 54 is pressed. With such a configuration, it is possible to prevent moisture from entering from the peripheral edge of the first side wall 13 and the peripheral edge of the second side wall 14 .

The first side wall 13 and the second side wall 14 can be opened and closed. According to such a configuration, maintenance of the wire feeder A1 can be easily performed by appropriately opening the first side wall 13 or the second side wall 14 . In addition, the first side wall 13 in the closed state is pressed against the first front seal member 51 and the first rear seal member 53, and the second side wall 14 in the closed state is pressed against the second front seal member 52 and the second front seal member 52. is pressed against the rear seal member 54 of the . Thereby, the waterproofness of the periphery of the first side wall 13 and the second side wall 14 that can be opened and closed is maintained.

Case 1 includes a front beam portion 25 and a rear beam portion 26 . Both ends of the front beam portion 25 are connected to the first front strut 21 and the second front strut 22 . Both ends of the rear beam portion 26 are connected to the first rear strut 23 and the second rear strut 24 . The ceiling wall 12 is connected to the front beam portion 25 and the front beam portion 25 . With such a configuration, the strength of the case 1 can be efficiently increased.

Case 1 includes a front wall 15 . The front wall 15 is provided with a torch connection portion 161 for connecting a welding torch and a guard portion 162 . The guard portion 162 protrudes forward in the feed direction X1 beyond the torch connection portion 161 . According to the configuration including the guard portion 162, it is possible to prevent the torch connecting portion 161 from being damaged. In this embodiment, the guard portions 162 are provided in pairs in the width direction Y of the bottom wall 11 , and the torch connection portion 161 is located between the pair of guard portions 162 in the width direction Y of the bottom wall 11 . To position. With such a configuration, the torch connecting portion 161 can be more appropriately protected. Moreover, it is convenient to drag and move the wire feeding device A1 by grasping the pair of guard portions 162 during the welding operation.

In this embodiment, an insulating sheet 81 and an insulating sheet 82 are arranged on the inner surface of the case 1 . The insulating sheet 82 is arranged at a portion facing the wire reel 70 , and the insulating sheet 81 is arranged at a portion facing the welding wire W<b>1 wound around the wire reel 70 . According to such a configuration, it is possible to prevent the welding wire W1 inside the case 1 from coming into direct contact with the metal case 1 . Therefore, the insulation between the metal case 1 and the welding wire W1 inside the case 1 can be enhanced.

Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to the above-described embodiments. subsumed in

A1: wire feeding device, W1: welding wire, X: feeding direction, Y: width direction, 1: case, 101: first opening, 102: second opening, 11: bottom wall, 12: ceiling wall, 124 13: first side wall 131: top (of first side wall) 14: second side wall 141: top (of second side wall) 15: front wall 161: torch Connection part 162: guard part 21: first front strut 22: second front strut 23: first rear strut 24: second rear strut 25: front beam part 26: rear beam Part 3: Front panel 34: Upper part (of front panel) 4: Rear panel 44: Upper part (of rear panel) 50: Ceiling sealing member 51: First front sealing member 52: Second Front seal member 53: First rear seal member 54: Second rear seal member 6: Wire feeding mechanism 70: Wire reel 81, 82: Insulating sheet

Claims (6)

A wire feeding device comprising: a wire feeding mechanism for feeding welding wire wound on a wire reel in a predetermined feeding direction; and a box-shaped case for housing the wire feeding mechanism,
The case includes a bottom wall, each made of a metal material, and one end and the other end in the width direction of the bottom wall that are forward in the feeding direction and perpendicular to the feeding direction in the bottom wall. First and second front struts standing from the sides, and first and second standing from one end side and the other end side of the bottom wall in the width direction on the rear side of the bottom wall in the feeding direction. and a ceiling wall supported by the first and second front struts and the first and second rear struts and facing the bottom wall;
a rectangular ring-shaped front panel made of a resin material surrounding the front end of the case in the feeding direction;
a rectangular ring-shaped rear panel made of a resin material surrounding the rear end of the case in the feeding direction ;
The case includes: a first side wall covering a first opening surrounded by the bottom wall, the ceiling wall, the first front strut and the first rear strut; a second sidewall covering a second opening bounded by two front struts and said second rear strut;
A sealing member groove having a rectangular shape in a plan view is formed in the peripheral edge of the ceiling wall,
An annular ceiling seal member is mounted in the seal member groove,
A wire feeder wherein tops of the first and second sidewalls, top of the front panel, and top of the rear panel press against the ceiling seal member. first and second front sealing members respectively arranged in a range from the ceiling wall to the bottom wall via the first and second front struts;
first and second rear seal members respectively arranged in a range from the ceiling wall to the bottom wall via the first and second rear struts;
the first side wall is in pressure contact with the entirety of the first front seal member and the first rear seal member;
2. The wire feeding device according to claim 1 , wherein said second side wall presses against the entirety of said second front seal member and said second rear seal member. 3. The wire feeding device according to claim 1 , wherein at least one of said first and second side walls is openable and closable. The case includes a front beam portion having both ends connected to the first and second front struts and to which the ceiling wall is fixed, a front beam portion having both ends connected to the first and second rear struts, and 4. A wire feeding device according to any one of claims 1 to 3 , comprising a rear beam to which the wall is fixed. the case includes a front wall located in an area surrounded by the bottom wall, the ceiling wall and the first and second front struts when viewed in the feeding direction;
5. The welding apparatus according to claim 1 , wherein the front wall is provided with a torch connection portion for connecting a welding torch, and a guard portion projecting forward in the feed direction from the torch connection portion. A wire feeding device according to any one of the preceding claims. A wire feeding device comprising: a wire feeding mechanism for feeding welding wire wound on a wire reel in a predetermined feeding direction; and a box-shaped case for housing the wire feeding mechanism,
The case includes a bottom wall, each made of a metal material, and one end and the other end in the width direction of the bottom wall that are forward in the feeding direction and perpendicular to the feeding direction in the bottom wall. First and second front struts standing from the sides, and first and second standing from one end side and the other end side of the bottom wall in the width direction on the rear side of the bottom wall in the feeding direction. and a ceiling wall supported by the first and second front struts and the first and second rear struts and facing the bottom wall;
a rectangular ring-shaped front panel made of a resin material surrounding the front end of the case in the feeding direction;
a rectangular ring-shaped rear panel made of a resin material surrounding the rear end of the case in the feeding direction;
A wire feeding device, wherein an insulating sheet is disposed on the inner surface of the case at a portion facing the wire reel and at a portion facing the welding wire wound around the wire reel.

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