JP3001174U - Spool cover for welding wire - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a cover that prevents the welding wire from spreading and separating from the welding wire spool due to elastic force and prevents deterioration of the quality of the welding wire. [Structure] A cover (4) covering a welding wire spool (1) is provided with a space (14) in which the spool (1) can be rotated, and is further provided with an outlet (9) through which a welding wire can be fed. Is.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cover for covering a spool in which a welding wire used in an automatic or semi-automatic welding machine is wound.

[0002]

[Prior art]

 Conventionally, in an automatic or semi-automatic welding machine such as TIG welding and MIG welding, a spool 1 (also called a reel or bobbin) wound with a welding wire A is used as shown in FIG. 1, and the welding wire A is sequentially sent out from the spool 1. I am using it. The usage state will be described with reference to FIG. FIG. 2 is a schematic diagram of an automatic welding machine. The spool 1 has a shaft hole 1a inserted into a fixed shaft 2a provided in a feeder 2 of a welding machine, and is rotatably fixed to the fixed shaft 2a by a spool stopper (not shown) provided at the tip of the fixed shaft 2a. Then, the welding wire A drawn from the spool 1 is sandwiched between the feeding rollers 2b, and the feeding roller 2b is rotated by the drive device 2c to continuously supply the welding wire A to the welding torch 3.

[0003]

[Problems to be solved by the device]

 Since the automatic welding machine has the above-described structure, the spool 1 is freely rotated with respect to the fixed shaft 2a of the supply device 2, and the rotation is barely suppressed by the weight of the spool 1 and the welding wire A. On the other hand, since the welding wire A is very elastic and has a small diameter, the force of spreading from the state of being wound on the spool 1 to the outside is strong. As a result, when the welding machine is stopped or intermittently operated, as shown in FIG. 3, the spool 1 rotates in the direction in which the welding wire A is unwound, spreads outward, and the so-called welding wire A is scattered. That often happened. When the welding wire A is separated, the welding wire A is entangled, which makes it impossible to feed the welding wire A, resulting in inconvenience such as damage. Moreover, since the welding wire A is exposed to the outside in the conventional automatic welding machine, the strand wire formed by twisting the thin wires, which is often used in the automatic TIG welding machine, has a foreign matter such as dust and dust due to the surface morphology. There was a problem that it was easy to adhere and it was difficult to remove the adhered dust and the like, and during welding, these foreign substances were mixed into the molten metal and the quality of welding deteriorated. Furthermore, in the flux-cored wire for welding, which has become very popular in recent years, it is necessary to prevent moisture contained in the flux contained in the wire and to prevent rust in order to avoid the formation of pores such as blowholes. However, if the spool 1 is still attached to the welding machine, it is not possible to prevent the flux of the wire from absorbing moisture. Therefore, remove the welding wire A, which is in use, together with the spool 1 from the welding machine and put it in a vinyl bag, cardboard case, etc. I had to take the trouble of storing it.

[0004]

[Means for Solving the Problems]

 The present invention made in order to solve the above problems covers a spool rotatably with a cover that covers at least the side peripheral surface of a spool for welding wire, and covers the side peripheral surface of the spool of this cover. The part where the welding wire can be fed is provided in the existing part.

It is preferable to provide a convex portion on the inner wall of the cover, which is in contact with the spool and brakes the rotation of the spool by a frictional force.

Alternatively, it is preferable that the cover is loosely and tightly fitted to the spool so that the inner wall surface of the cover comes into contact with the spool and brakes the rotation of the spool by frictional force.

Further, it is preferable that the outlet is formed in a slit shape parallel to the shaft hole of the welding wire spool.

Further, it is desirable to chamfer one side edge in the longitudinal direction of the slit-shaped outlet.

[0009]

[Action]

 With this configuration, since the welding wire spool cover is provided with a welding wire drawing port, the welding wire spool is covered and attached to the feeder of the welding machine as it is, and the welding wire is drawn out from the drawing port. Welding work can be performed by continuously supplying to the welding torch through the feeding rollers of the feeding device. During this operation, the welding wire is blocked by the inner wall of the cover because the spool is covered by the cover, and the welding wire does not spread beyond the inner wall of the cover. Moreover, the welding wire can be shielded from the outside by this cover.

Further, the inner wall of the cover is provided with a convex portion that comes into contact with the spool to brake the rotation of the spool by frictional force, or the cover can be loosely fitted to the spool, thereby making it possible to weld the welding wire. The rotation of the spool due to the elastic force of the welding wire is suppressed and the welding wire does not spread to the outside.

Further, since the above-mentioned outlet is a slit shape parallel to the shaft hole of the spool for welding wire, the shaft hole of the spool when the welding wire is fed from the spool through the outlet is provided. It can handle parallel movements.

Then, by chamfering one side edge in the longitudinal direction of the slit-shaped outlet, the welding wire is generated by the above chamfer when the welding wire is fed through the outlet. When the cover is mounted on the spool so as to come into contact with the surface, the welding wire is fed not through point contact but with line contact with one side edge of the drawing port in the longitudinal direction, so that the welding wire is fed through the drawing port. The resistance at the time can be reduced.

[0013]

【Example】

 Hereinafter, details of the present invention will be described based on embodiments with reference to the drawings. (Embodiment 1) FIG. 4 is a perspective view showing a cover 4 for a welding wire spool according to Embodiment 1 and a spool 1 on which the cover 4 is mounted. The cover 4 is made of translucent polypropylene or the like, and a hollow cylindrical body having holes 5 on its upper and lower surfaces is vertically divided into two halves, and the halves 4a and 4b are connected by a hinge 6. It has an oval shape. Then, an engaging step portion 7 that engages with each other is provided on the end faces that face each other when the half bodies 4a and 4b are combined, and the half bodies 4a and 4b can be locked and fixed together. Locking portions 8a and 8b are provided at the respective ends of 4a and 4b. In the closed state, the cover 4 has a cylindrical space in which the inside thereof is slightly larger than the outer diameter of the spool 1 and slightly higher than the thickness of the spool 1, and when the spool 1 is stored, The side peripheral surface of the spool 1 can be covered and can be rotatably held. A slit-shaped outlet 9 through which the welding wire A is inserted is provided on the side peripheral surface of the cover 4 so as to be parallel to the shaft hole 1a of the spool 1. Further, the drawer opening 9 is chamfered at one side edge in the longitudinal direction, and a surface generated by this chamfer constitutes an opening upper edge surface 9a which will be described in detail later.

A method of using the cover 4 will be described below. First, as shown in FIG. 4, the halves 4a and 4b of the cover 4 are opened and the spool 1 is housed inside the cover 4. At this time, the tip of the welding wire A is brought out of the cover 4 through the outlet 9. Then, the halves 4a and 4b of the cover 4 are put together, and the locking portions 8a and 8b at the ends are engaged and fixed. With this, as shown in FIG. 5, the side peripheral surface of the spool 1 is completely covered by the cover 4, but the shaft hole 1a of the spool 1 is exposed from the hole 5 of the cover 4 and the welding hole A of the welding wire A from the outlet 9. The tip is exposed. In this state, as shown in FIG. 5, the shaft hole 1a of the spool 1 is fitted into the fixed shaft 2a of the feeding device 2, and the spool stopper 2d formed so as to engage with the tip of the fixed shaft 2a is fixed to the fixed shaft 2a. The spool 1 which is attached and covered with the cover 4 is rotatably fixed. Then, the tip of the welding wire A is passed between the feeding rollers 2b provided in the feeding device 2 of the automatic welding machine and continuously fed to the welding torch 3 for welding work.

With such a configuration, the cover 4 of the welding wire spool according to this embodiment can prevent the welding wire A from coming loose, as will be described below. FIG. 6 is a cross-sectional view showing the inside of the cover 4 with the welding machine stopped. In this state, the spool 1 is rotated by the elastic force of the welding wire A, and the welding wire A unwinds and tries to spread to the outside. However, since the side peripheral surface of the spool 1 is covered with the cover 4, the welding wire A is held by the inner wall 10 of the cover 4 and cannot spread further. Further, since the inner wall 10 is pressed by the welding wire A, a rotational force is generated in the cover 4 due to the friction, but the cover 4 is prevented from rotating by the welding wire A hitting the outlet 9, Only spool 1 of will rotate. When the spool 1 rotates to some extent and the welding wire A is loosened to some extent, the welding wire A held by the inner wall of the cover 4 has a force to rotate the spool 1 in the direction opposite to the rotation until then, and eventually the spool 1 Stops rotating. That is, as shown in the figure, the welding wire A stops in a state where it spreads by a certain amount and does not come apart.

Next, the features of the outlet 9 will be described. First, since the width of the outlet 9 is slit-shaped, which is almost the same as the width of the spool 1, when the welding wire A is fed, the movement of the welding wire A in the direction parallel to the fixed axis 2a can be coped with, and the feeding can be facilitated. To help. Further, as described above, one side edge in the longitudinal direction of the slit-shaped outlet 9 is chamfered to form the opening upper edge surface 9a. The upper edge surface 9a of the opening will be described with reference to FIG. FIG. 7 is a sectional view showing a contact state between the outlet 9 and the welding wire A. FIG. 7 shows a state in which the welding machine is operating and the welding wire A is being fed from the spool 1 one after another. In this state, the welding wire A is pulled out from the outlet 9 in a substantially straight state, and the welding wire A pushes up the upper edge 9a of the opening of the outlet 9. That is, while the welding wire A is being fed, the upper edge surface 9a of the opening of the outlet 9 is always in contact with the welding wire A. Therefore, when the welding wire A is paid out, frictional resistance to the welding wire A is most likely to occur on the opening upper edge surface 9a. However, the upper edge surface 9a of the opening of the drawer opening 9 is formed by chamfering one side edge in the longitudinal direction of the drawer opening. The edge surface 9a is substantially parallel, and the upper edge surface 9a of the opening and the welding wire A are in line contact, not in point contact. As a result, the resistance between the welding wire A and the opening upper edge surface 9a is reduced, and the welding wire A can be smoothly fed.

In Embodiment 1, the size of the space formed inside when the cover 4 is closed is almost the same as the outer diameter of the spool 1, and a cylindrical space slightly higher than the thickness of the spool 1 is formed. It may be set to be possible. More specifically, the space formed inside the cover 4 is loosely and tightly fitted to the spool 1 when the spool 1 is housed inside the cover 4, and the fitting is such that the inner wall 10 of the cover 4 and the spool 1 are fitted together. Although the spool 1 does not rotate due to the elastic force of the welding wire A due to the frictional force generated between the disc portion and the outer edge 1 c, it does not rotate to the feeding roller 2 b provided in the feeding device 2 of the welding machine. Therefore, the welding wire A is set so that it can rotate when pulled out.

As described above, when the internal space of the cover 4 is set to the above-mentioned size, when the spool 1 is housed in the cover 4 and mounted on the automatic welding machine, the automatic welding machine is stopped. Since the rotation of the spool 1 is braked by the fitting of the inner wall 10 of the cover 4 and the outer edge 1c of the disk portion of the spool 1, the spool 1 does not rotate due to the elastic force of the welding wire A. The welding wire A does not spread from the spool 1 and is not exposed.

Further, as described above, even if the inner wall 10 of the cover 4 and the outer edge 1 c of the disc portion of the spool 1 are not fitted to each other, for example, the inner wall 10 of the cover 4 and the disc portion of the spool 1 may be formed. The outer surface 1b may be fitted, or both the inner wall 10 of the cover 4 and the outer edge 1c of the disc portion of the spool 1 and the outer surface 1b may be fitted. Further, the inner wall 10 of the cover 4 and the mating surface of the cover 4 may be provided with concave and convex portions, or members having a large friction coefficient may be provided to improve the braking ability of the spool 1.

Second Embodiment FIG. 8 is a perspective view showing a welding wire spool cover 4 according to a second embodiment and a spool 1 to which the cover 4 is mounted. The cover 4 is composed of a bottomed cylindrical body 4a having a hole 5a at the center of the bottom surface and a cap 4b having a hole 5b at the center for engaging the open end of the body 4a. The material of the cover 4 and the shape of the internal space are similar to those of the first embodiment, and when the spool 1 is housed inside the cover 4, the side peripheral surface of the spool 1 can be covered and rotatably held. A ring-shaped member made of a soft material having elasticity such as urethane foam is adhered to the bottom surface of the main body 4a to form a braking convex portion 12. The same thing is also adhered to the inner upper surface of the cap 4b to form the braking convex portion 12. The thickness of the braking protrusion 12 is such that when the spool 1 is housed inside the cover 4, the braking protrusion 12 comes into contact with the outer surface 1b of the disk portion of the spool 1 to restrict the rotation of the spool 1 so that the spool 1 can be attached to the welding wire A. The thickness is such that it does not rotate due to elastic force, but is pressed by a force that allows it to rotate when the welding wire A is pulled out by the feed roller 2b. Further, an outlet 9 through which the welding wire A is passed is provided at the same position as in the first embodiment. The shape of the outlet 9 is also the same as that of the first embodiment. A lid 11 for the opening 9 which is fixed so as to be openable and closable is provided near the opening 9. The lid 11 is provided with a convex portion 11a so that it can be fixed in a closed state, and can be engaged with and disengaged from a concave portion 11b formed on the outer surface of the cover 4 which is formed so as to engage with the convex portion 11a. is there. The end surface of the lid 11 is provided with a notch 11c having a width substantially equal to the diameter of the welding wire A so that the lid 11 can be closed with the welding wire A pulled out. A sealing plate 11d made of a soft material having elastic force such as urethane foam is attached to this so that the cover 4 can be closed tightly in the closed state.

With the above structure, the cover 4 of the welding wire spool according to the second embodiment has the following features. First, since the rotation of the spool 1 is restricted by the braking protrusions 12 provided on the cover 4 and the spool 1 does not rotate due to the elastic force of the welding wire A, the welding wire A is firmly attached to the spool 1 even when the welding machine is stopped. The wound wire can be maintained and the welding wire A does not spread from the spool 1. Therefore, the welding wire A can be reliably prevented from coming loose. Further, since the outlet 11 is provided with the lid 11 having the notch 11c, the welding wire A can be closed while the welding wire A is protruding from the outlet 9, and the outlet 9 can be sealed by the sealing plate 11d. On the other hand, since the outside air entering through the holes 5a and 5b is blocked by the braking protrusion 12, the inside of the cover 4 can be completely sealed when the lid 11 is closed. As a result, even if a flux-cored wire or the like is used, even if the spool 1 is not removed from the welder during the use of the welding wire A after the welding work is completed, the lid 11 is simply closed to absorb the moisture or rust the welding wire A. Can be completely prevented. Further, the quality of the welding wire A is not impaired because the welding wire A can be stored while being stored in the cover 4 with the tip of the welding wire A taken out even during transportation and storage.

In the present embodiment, the braking protrusion 12 for controlling the rotation of the spool 1 is configured to press the outer surface 1b of the disc portion of the spool 1, but this is the outer peripheral surface of the disc portion. 1c may be pressed, or the inner wall of the shaft hole portion 1a of the spool 1 may be pressed. And, as a matter of course, the braking protrusion 12 may have a shape corresponding to the portion that presses the spool 1. Further, the braking protrusion 12 may be formed integrally with the cover 4 or may be provided with a member having a large friction coefficient, and the surface contacting the spool 1 and the surface facing the spool 1 may be uneven. The frictional force may be increased by providing them.

Further, in the embodiment, since the cover 4 is made of a translucent material, the inside can be seen, so that the consumption amount of the welding wire A can be discriminated from the outside. This material is preferably a transparent or semi-transparent synthetic resin, but if there is no inconvenience even if the inside cannot be seen, a material such as metal or ceramic can be used depending on the working environment. The outer shape of the cover 4 does not have to be a columnar shape, and may be a rectangular parallelepiped shape, a semi-cylindrical shape or the like as long as an appropriate space can be obtained inside.

Further, in the embodiment, the holes 5 (5a, 5b) provided in the cover 4 are provided in the shaft hole 1a of the spool 1 so that the spool 1 can be rotatably held. It is provided to pass the fixed shaft 2a, but this is not always necessary. For example, if the welding machine is provided with a means capable of sandwiching and fixing the outer wall of the cover 4, the spool 1 can be rotatably held by the cover 4 and the fixed shaft 2a can be eliminated. .

In the embodiment, the cover 4 is opened and closed so that the spool 1 can be taken out and put in. However, this is because the spool 1 cannot be taken out when the spool 1 is put in the cover 4 at the manufacturing stage. You may Actually, the spool 1 is rarely taken out from the cover 4, and there is no inconvenience if the cover 4 is discarded together with the spool 1 when the welding wire A is completely consumed.

Further, although it is the outlet 9 of the cover 4, the opening edge may be covered with a high-strength material such as metal for reinforcement. The outlet 9 may be provided with an opening made of a soft material such as rubber and having a hole into which the welding wire A can be fitted. With this opening, the withdrawal opening 9 is closed with the welding wire A pulled out, and by using it together with the braking projection 12 of the second embodiment, the welding wire A is kept in a closed state not only after the welding operation but also during the welding operation. You can

[0027]

[Effect of device]

 The present invention has the following effects due to the configuration described above. First, without removing the welding wire spool cover, the spool can be attached to the welding machine for welding work, and since the welding wire is blocked from the outside during the work, dust, dust, etc. adhere to the welding wire. Without degrading the quality of the welding wire. Also, since the inner wall of the cover suppresses the spread of the welding wire, the welding wire does not come apart and the welding wire A does not become entangled. Therefore, the welding wire A cannot be fed during the welding work, and the work is smooth. It does not damage the welding wire.

Further, by providing a convex portion on the inner wall of the cover for abutting against the spool to brake the rotation of the spool by frictional force, or by allowing the cover to be loosely and tightly fitted to the spool, the welding wire Since the rotational movement of the spool due to the elastic force of the welding wire is suppressed, it is possible to prevent the welding wire from falling apart more reliably, which also helps to smooth the work and prevent deterioration of the welding wire.

In addition, since the above-mentioned outlet is a slit shape parallel to the shaft hole of the welding wire spool, the welding wire is inserted into the spool shaft hole when it is fed from the spool through the outlet. Since it can respond to parallel movements, the welding wire can be smoothly fed out.

Then, by chamfering one side edge in the longitudinal direction of the slit-shaped outlet, the welding wire makes a line contact with the one side edge in the longitudinal direction of the outlet, not a point contact, so that welding is performed. The resistance when the wire is fed through the outlet can be reduced, which also helps facilitate the feeding of the welding wire.

[Brief description of drawings]

FIG. 1 is a perspective view showing a spool for a welding wire.

FIG. 2 is a schematic diagram of an automatic welding machine.

FIG. 3 is a view showing a disassembled state of a welding wire.

FIG. 4 is a perspective view showing a first embodiment.

FIG. 5 is a perspective view showing a use state of a welding wire spool cover.

FIG. 6 is a cross-sectional view showing a use state of the welding wire spool cover.

FIG. 7 is a cross-sectional view showing a contact state between an outlet and a welding wire.

FIG. 8 is a perspective view showing a second embodiment.

[Explanation of symbols]

 1 Spool 1a Spool shaft hole 2a Fixed shaft 4 Cover 9 Draw-out port 9a Opening upper edge surface

Claims (5)

[Scope of utility model registration request] 1. A spool cover for a welding wire, which covers at least a side peripheral surface of a spool for a welding wire, holds the spool rotatably, and has an outlet in a portion covering the side peripheral surface. 2. A spool cover for a welding wire according to claim 1, wherein the spool cover for a welding wire is closely fitted. 3. The welding wire spool cover according to claim 1, wherein a convex portion that comes into contact with the welding wire spool is provided on the inner wall. 4. The welding wire spool cover according to claim 1, 2, or 3, wherein the outlet is formed in a slit shape that is parallel to the shaft hole of the welding wire spool. 5. The spool cover for a welding wire according to claim 4, wherein one side edge in the longitudinal direction of the slit-shaped outlet is chamfered.