Wire feeding device

Abstract

To inhibit a cover from being closed unintentionally during replacement work of a reel.SOLUTION: A support shaft 30 is inserted into first hinge parts 11 of a body base 10 and second hinge parts 21 of a cover 20. The support shaft 30 rotatably supports the cover 20. A nut 40 is fastened to a screw part 31 of a tip part of the support shaft 30. The first hinge parts 11 and the second hinge parts 21 are sandwiched between a head part 32 of the support shaft 30 and the nut 40 to be held.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a wire feeder. [Background technology]

[0002] Patent Document 1 discloses a consumable electrode arc welding device equipped with a sealing cover including a cover main body that can cover and seal a wire reel, and an openable cover part that can open and close an opening of the cover main body.

[0003] In the invention of Patent Document 1, when replacing the wire reel, the openable cover is flipped up to prevent the openable cover from falling, and in that state the used wire reel is removed from the support shaft. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-047238 Summary of the Invention [Problem to be solved by the invention]

[0005] However, if there is not enough space above the sealing cover to flip up the opening / closing cover, the worker must replace the wire reel while holding the opening / closing cover in a half-open position, which creates a problem of poor workability.

[0006] The present invention has been made in view of the above points, and its object is to prevent the cover from being unintentionally closed during the reel replacement work. [Means for solving the problem]

[0007] A first invention is a wire feeding device that pulls out and feeds a wire from a reel around which the wire is wound, and includes a main body base having a storage space for accommodating the reel and having an opening for inserting and removing the reel from the storage space, a cover that can open and close and cover the opening of the main body base, a support shaft that is inserted into a first hinge portion provided on the main body base and a second hinge portion provided on the cover and rotatably supports the cover, and a nut that fastens to a screw portion provided at the tip of the support shaft, and the first hinge portion and the second hinge portion are sandwiched and held between the head portion of the support shaft and the nut.

[0008] In the first aspect of the present invention, the cover can be fixed in an open state at any angle, and the cover can be prevented from being closed unintentionally during the reel replacement work.

[0009] Specifically, by sandwiching and holding the first hinge portion of the main body base and the second hinge portion of the cover between the head portion of the support shaft and the nut, pressure is applied to the first hinge portion and the second hinge portion, and frictional force is generated between the first hinge portion and the second hinge portion.

[0010] As a result, even when the cover is open at any angle, the frictional force between the first hinge portion and the second hinge portion can prevent the cover from closing unintentionally.

[0011] The second invention is the wire feeding device of the first invention, further comprising an elastic member arranged between the nut and the first hinge portion or the second hinge portion that faces the nut in the axial direction of the support shaft.

[0012] In the second aspect of the present invention, the elastic member can increase the pressure that presses the first hinge portion and the second hinge portion together, thereby increasing the frictional force that occurs between the first hinge portion and the second hinge portion.

[0013] In addition, by appropriately setting the elastic force of the elastic member, the pressure applied by the first hinge portion and the second hinge portion can be adjusted, allowing the cover to be opened and closed smoothly while being firmly fixed in place at any angle.

[0014] A third aspect of the present invention is the wire feeder of the second aspect, wherein the elastic member is a spring washer.

[0015] In the third aspect of the present invention, the spring washer can increase the pressure that presses the first hinge portion and the second hinge portion together, thereby increasing the frictional force that occurs between the first hinge portion and the second hinge portion.

[0016] A fourth invention is a wire feeding device according to any one of the first to third inventions, wherein the head portion is provided with an engagement portion in which a portion of the outer circumferential edge is cut out, and the first hinge portion is provided with a regulating portion that abuts against the engagement portion and regulates circumferential rotation of the support shaft.

[0017] In the fourth invention, the engagement portion of the head portion and the regulating portion of the first hinge portion are brought into contact with each other, thereby restricting the circumferential rotation of the support shaft, making it easier to tighten the nut onto the threaded portion of the support shaft.

[0018] A fifth invention is a wire feeding device according to any one of the first to third inventions, wherein one of the first hinge portion or the second hinge portion is provided in at least four portions spaced apart in the axial direction of the support shaft so as to have at least three gap portions in the axial direction of the support shaft, and the other of the first hinge portion or the second hinge portion is provided in at least three portions spaced apart in the axial direction of the support shaft and arranged in the gap portions.

[0019] In the fifth invention, by arranging a plurality of second hinge portions in a plurality of gap portions provided between a plurality of first hinge portions, the contact area between the first hinge portion and the second hinge portion can be increased, thereby increasing the frictional force.

[0020] A sixth invention is a wire feeding device according to any one of the first to third inventions, wherein the first hinge portion is provided at the top of the main body base in the vertical direction, and the center of gravity of the cover is located on an imaginary straight line extending along the vertical direction and passing through the first hinge portion when viewed from a horizontal direction perpendicular to the axial direction of the support shaft.

[0021] In the sixth invention, by positioning the center of gravity of the cover on an imaginary line extending vertically and passing through the first hinge portion, it is possible to prevent the first hinge portion and the second hinge portion from twisting and causing deformation of the cover when opening or closing the cover. [Effects of the Invention]

[0022] According to the present invention, it is possible to prevent the cover from being closed unintentionally during the reel replacement work. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a front view showing a configuration of a wire feeder according to an embodiment of the present invention. [Figure 2] FIG. 2 is a front view showing the cover in an open state. [Figure 3] FIG. 2 is a perspective view showing the periphery of a first hinge portion and a second hinge portion. [Figure 4] FIG. 2 is a front view showing the periphery of the first hinge portion and the second hinge portion. [Figure 5] 5 is a view taken along the arrow A in FIG. 4, showing the periphery of the first hinge portion and the second hinge portion. [Figure 6] FIG. 2 is an exploded perspective view showing the periphery of a first hinge portion and a second hinge portion. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the following description of the preferred embodiments is merely exemplary in nature and is not intended to limit the present invention, its applications, or its uses.

[0025] Overall structure 1 and 2, the wire feeder 1 unwinds and feeds the wire 2 from a reel 3 around which the wire 2 is wound. The reel 3 has an outer diameter of, for example, 100 mm to 400 mm. The wire feeder 1 includes a wire feeder 5, a main body base 10, and a cover 20.

[0026] The wire feeding unit 5 has a pair of feeding rollers 6 and a motor (not shown). Two pairs of feeding rollers 6 are provided spaced apart in the feeding direction of the wire 2. The wire 2 is sandwiched between the pair of feeding rollers 6. The feeding rollers 6 are rotated by the motor to feed the wire 2.

[0027] The main body base 10 has a storage space 15. The storage space 15 stores the reel 3. A reel shaft 16 is provided in the storage space 15. The reel shaft 16 extends in the depth direction of the paper in FIG. 2. The reel 3 is rotatably supported by the reel shaft 16.

[0028] An opening 17 is provided in the main body base 10. The opening 17 opens toward the front of the paper in FIG.

[0029] The cover 20 closes the opening 17 of the main body base 10 in an openable and closable manner. The cover 20 is provided with a locking mechanism 25. The locking mechanism 25 engages with the main body base 10 while the opening 17 is closed by the cover 20, thereby preventing the cover 20 from opening.

[0030] <First hinge section and second hinge section> As shown in FIGS. 3 to 6, a first hinge portion 11 is provided on the main body base 10. The first hinge portion 11 is provided on the upper part of the main body base 10 in the vertical direction. A second hinge portion 21 is provided on the cover 20. A support shaft 30 is inserted through the first hinge portion 11 and the second hinge portion 21. The support shaft 30 supports the cover 20 so that it can rotate.

[0031] A threaded portion 31 is provided at the tip of the support shaft 30 (see FIG. 6). A head portion 32 is provided at the end of the support shaft 30 opposite to the threaded portion 31. The outer diameter of the head portion 32 is larger than the outer diameter of the shaft portion of the support shaft 30. Here, the head portion 32 has a flange-like (brim-like) shape.

[0032] An engaging portion 33 is provided on the head portion 32 (see FIG. 5). The engaging portion 33 is formed by cutting out a portion of the outer periphery of the head portion 32. A restricting portion 12 is provided on the first hinge portion 11 of the main body base 10. The restricting portion 12 abuts against the engaging portion 33 of the head portion 32 of the support shaft 30 to restrict rotation of the support shaft 30 in the circumferential direction. This makes it easier to fasten the nut 40 to the threaded portion 31 of the support shaft 30.

[0033] A plurality of first hinge portions 11 of the main body base 10 are provided at intervals in the axial direction of the support shaft 30 (left-right direction, X direction in FIG. 4). In the example shown in FIG. 4, four first hinge portions 11 are provided at intervals in the axial direction of the support shaft 30 so that there are three gap portions 13 in the axial direction of the support shaft 30.

[0034] Four second hinge portions 21 of the cover 20 are provided at intervals in the axial direction of the support shaft 30. Three of the four second hinge portions 21 are arranged in the three gap portions 13. The remaining second hinge portion 21 is located closer to the screw portion 31 of the support shaft 30 than the first hinge portion 11 at the right end. Note that the first hinge portion 11 may be located closer to the screw portion 31 of the support shaft 30 than the second hinge portion 21.

[0035] In this way, at least four of either the first hinge portion 11 or the second hinge portion 21 are provided at intervals in the axial direction of the support shaft 30 so as to have at least three gaps 13 in the axial direction of the support shaft 30. At least three of the other of the first hinge portion 11 or the second hinge portion 21 are provided at intervals in the axial direction of the support shaft 30 and are arranged in the gaps 13.

[0036] A nut 40 is fastened to the threaded portion 31 of the support shaft 30. An E-ring 45 is attached to the support shaft 30 on the tip side of the nut 40. The E-ring 45 prevents the nut 40 from falling off the support shaft 30.

[0037] In the axial direction of the support shaft 30, an elastic member 41 is provided between the nut 40 and the second hinge portion 21 facing the nut 40. The elastic member 41 is, for example, a spring washer. A washer 42 is disposed between the elastic member 41 and the second hinge portion 21.

[0038] The spring washer can increase the pressure that presses the first hinge portion 11 and the second hinge portion 21 together, thereby increasing the frictional force that occurs between the first hinge portion 11 and the second hinge portion 21.

[0039] By tightening the nut 40 onto the threaded portion 31 of the support shaft 30, the first hinge portion 11 and the second hinge portion 21 are sandwiched and held between the head portion 32 of the support shaft 30 and the nut 40 via the elastic member 41.

[0040] As described above, the wire feeding device 1 of this embodiment is a wire feeding device that pulls out and feeds wire 2 from a reel 3 on which the wire 2 is wound, and includes a main body base 10 having a storage space 15 for accommodating the reel 2 and provided with an opening 17 for inserting and removing the reel 2 into the storage space 15, a cover 20 that closes and opens / closes the opening 17 of the main body base 10, a support shaft 30 that is inserted into a first hinge portion 11 provided on the main body base 10 and a second hinge portion 21 provided on the cover 20 and rotatably supports the cover 20, and a nut 40 that fastens to a screw portion 31 provided at the tip of the support shaft 30, and the first hinge portion 11 and the second hinge portion 21 are sandwiched and held between a head portion 32 of the support shaft 30 and the nut 40.

[0041] In this way, the cover 20 can be fixed in an open state at any angle, and the cover 20 can be prevented from being closed unintentionally during the work of replacing the reel 3.

[0042] Specifically, by sandwiching and holding the first hinge portion 11 of the main body base 10 and the second hinge portion 21 of the cover 20 between the head portion 32 of the support shaft 30 and the nut 40, pressure is applied to the first hinge portion 11 and the second hinge portion 21, and a frictional force is generated between the first hinge portion 11 and the second hinge portion 21.

[0043] As a result, even when the cover 20 is opened at any angle, the frictional force between the first hinge portion 11 and the second hinge portion 21 can prevent the cover 20 from closing unintentionally.

[0044] Furthermore, if the first hinge portion 11 and the second hinge portion 21 are made of an elastically deformable material, such as a resin material, the first hinge portion 11 and the second hinge portion 21 will elastically deform when pressure is applied to them, and the frictional force generated between the first hinge portion 11 and the second hinge portion 21 will become even greater.

[0045] In addition, by appropriately setting the elastic force of the elastic member 41, the pressure applied between the first hinge portion 11 and the second hinge portion 21 can be adjusted, allowing the cover 20 to be opened and closed smoothly while firmly fixing the cover 20 in an open position at any angle.

[0046] In addition, by arranging multiple second hinge portions 21 in multiple gap portions 13 provided between multiple first hinge portions 11, the contact area between the first hinge portion 11 and the second hinge portion 21 can be increased, and the frictional force can be increased.

[0047] In this embodiment, a configuration in which four first hinge portions 11 and four second hinge portions 21 are provided has been described, but the number of first hinge portions 11 and second hinge portions 21 is merely an example and is not limited to this.

[0048] <About the center of gravity of the cover> 2, the first hinge portion 11 is provided at the upper part of the main body base 10 in the vertical direction (the up-down direction, Z direction in FIG. 2). The center of gravity G of the cover 20 is located on an imaginary straight line L that extends in the vertical direction (the up-down direction, Z direction in FIG. 2) and passes through the first hinge portion 11, when viewed from the horizontal direction (the depth direction of the paper in FIG. 2, Y direction) perpendicular to the axial direction of the support shaft 30 (the left-right direction, X direction in FIG. 2).

[0049] In the example shown in FIG. 2, the locking mechanism 25 is provided on the left side (X direction) of the cover 20, and the center of gravity G of the cover 20 is located on an imaginary line L shifted leftward from the axis of the reel shaft 16.

[0050] In this way, by positioning the center of gravity G of the cover 20 on an imaginary straight line L that extends vertically and passes through the first hinge portion 11, it is possible to prevent the first hinge portion 11 and the second hinge portion 21 from twisting and causing deformation of the cover 20 when opening or closing the cover 20.

[0051] More specifically, when opening or closing the cover 20, it is possible to prevent the first hinge portion 11 and the second hinge portion 21 from twisting, which would cause the second hinge portion 21 of the cover 20 to deform, preventing smooth opening and closing of the cover 20. Furthermore, it is possible to prevent the cover 20 from not fitting properly into the main body base 10. [Industrial Applicability]

[0052] As described above, the present invention has the highly practical effect of preventing the cover from closing unintentionally during the reel replacement process, and is therefore extremely useful and has high industrial applicability. [Explanation of symbols]

[0053] 1 Wire feeder 2 wire 3 reels 10 Main unit base 11 First hinge part 12 Regulatory Department 13 Cavity 15 Containment Space 17 Opening 20 Cover 21 Second hinge part 30 Support shaft 31 Threaded part 32 Head 33 Engagement part 40 nuts 41 Elastic member G center of gravity L Imaginary line

Claims

1. A wire feeding device that unwinds and feeds a wire from a reel on which the wire is wound, a main body base having a storage space for storing the reel and having an opening for inserting and removing the reel into and from the storage space; a cover that closes the opening of the main body base in an openable and closable manner; a support shaft that is inserted through a first hinge portion provided on the main body base and a second hinge portion provided on the cover and that rotatably supports the cover; a nut fastened to a threaded portion provided at the tip of the support shaft, The first hinge portion and the second hinge portion are sandwiched and held between the head portion of the support shaft and the nut. Wire feeder.

2. The wire feeder of claim 1, an elastic member disposed between the nut and the first hinge portion or the second hinge portion facing the nut in the axial direction of the support shaft; Wire feeder.

3. The wire feeder of claim 2, The elastic member is a spring washer. Wire feeder.

4. The wire feeding device according to any one of claims 1 to 3, The head portion is provided with an engagement portion formed by cutting out a part of the outer periphery thereof, The first hinge portion is provided with a restricting portion that abuts against the engaging portion and restricts rotation of the support shaft in the circumferential direction. Wire feeder.

5. The wire feeding device according to any one of claims 1 to 3, At least four of the first hinge portion or the second hinge portion are provided at intervals in the axial direction of the support shaft so as to have at least three gap portions in the axial direction of the support shaft, At least three of the other of the first hinge portion or the second hinge portion are provided at intervals in the axial direction of the support shaft and are disposed in the gap portion. Wire feeder.

6. The wire feeding device according to any one of claims 1 to 3, the first hinge portion is provided at an upper portion of the main body base in a vertical direction, The center of gravity of the cover is located on an imaginary line that extends along the vertical direction and passes through the first hinge portion when viewed from a horizontal direction perpendicular to the axial direction of the support shaft. Wire feeder.

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