JPH0211984Y2 - - Google Patents

Description

[Detailed description of the invention] This invention securely winds welding wire (hereinafter simply referred to as wire) around a spool for winding welding wire, especially a squirrel cage spool with double flanges formed by combining wire rods. This invention relates to a wire winding device that can be used to wind wires.

Figure 1 (perspective view) shows a typical example of a cage-shaped spool.
As shown in FIG. 2 (cross-sectional view), for example, a plurality of spool elements a, b, c, etc. formed by bending one metal wire (usually a steel wire) 1 are arranged in a circular shape, and adjacent spools are The radial rims of the elements are joined together to form a spool.
Because they are inexpensive, lightweight, and have sufficient strength, they are increasingly being used as an alternative to plastic spools.

By the way, in the cage-shaped spool formed as described above, the winding drum 3 on which the wire 2 is wound is composed of axis-parallel wire rods 1a arranged at approximately equal pitches, so that the cross-sectional shape of the winding drum 3 itself is is polygonal. Therefore, if the wire 2 is directly wound around the winding drum 3, the wire 2 will be bent at the outer peripheral area of the axis-parallel wire 1a, as shown in FIG. If you place the pitch, it will become a wire with a bend. That is, since the wire 2 is wound with a certain tension applied to the wire 2, the wire 2 wound along the winding drum 3 has an axis-parallel wire material 1 as described above.
There is a problem in that the bending caused in the outer circumferential area of a remains as it is, making the aiming position of the wire inaccurate when performing welding. Therefore, when winding wire around such a squirrel-cage spool, an arc-shaped temporary winding drum for winding, which is formed with a smooth circumferential outer surface, is used, and after the winding is completed, this temporary winding cylinder is pulled out and the wire is wound. A possible solution is to pass the wire around the outer periphery of the winding drum 3. Hereinafter, this temporary winding drum may also be referred to as a dummy winding drum. When attaching the dummy winding drum to the winding drum 3 of the cage-shaped spool, at least the metal wire 1 constituting the flange surface can be cleared for insertion and removal, and the outer diameter of the inserted dummy winding drum must be the same as or slightly larger than the diameter of the circumscribed circle of the polygon formed by the winding drum 3. Furthermore, in order to take out the dummy winding drum from the cage-shaped spool after the wire winding process is completed, it is necessary to be able to reduce the diameter of the dummy winding drum so that it can be released from the hugging force generated during wire winding. Furthermore, the starting end of the wire winding must be directly wound and fixed on the winding drum 3 itself, not on the dummy winding drum, and when this is done, the winding starting end must be securely engaged, so it is especially important to A dummy winding drum equipped with a suitable engagement mechanism is required.

The inventors of the present invention conducted various studies on dummy winding drums that satisfy the above requirements, and were able to provide a wire winding device as shown below.

That is, the device of the present invention consists of a driven flange and a driving flange, and the driven flange is provided with a plurality of claw pieces protruding from the driven flange so as to be able to swing freely. It has a radius of curvature that is the same as or slightly larger than the circumscribed circle of the polygonal cross section formed by the axis-parallel wire material, and is divided in the circumferential direction at the circumferential arrangement pitch of the axis-parallel wire material for wire winding. A group of claw pieces is formed, each claw piece being disposed in the gap between the axis-parallel wire rods, and an engaging hole is provided in the drive flange so that the tip of the claw piece can be freely attached to and detached from the drive flange. The gist is that the tips of each claw piece are configured to be able to move forward and backward relative to each other.

Hereinafter, the configuration and effects of the present invention will be specifically explained based on the drawings of the embodiments.

FIG. 3 illustrates the wire winding device according to the present invention, and is a sectional view showing a cage-shaped spool being held between the wire winding devices, and FIG.
FIG. 5 is a sectional view of the upper part of FIG. 3, and FIG. 6 is a cross-sectional view corresponding to the line sectional view of FIG. 5. In these figures, 4 is a driven rotation member;
Reference numeral 5 denotes a drive rotation member, and 6 a group of claw pieces for wire winding (hereinafter also simply referred to as claw pieces). Reference numeral 7 indicates a spherical bearing for supporting a claw piece, 9 indicates a wire end fixture, and 10 indicates a rubber material for a cushion. First, a driven rotating member (hereinafter simply referred to as a driven flange) 4 and a driving rotating member (hereinafter simply referred to as a driving flange) 5 are arranged facing each other on the same axis so that they can approach and separate from each other. A wire winding claw piece group 6 is attached. That is, the claw piece 6 is a divided cylindrical body divided in the circumferential direction along the circumferential arrangement pitch of the axis-parallel wire 1a, and is the same as the virtual circumcircle of the polygon formed by the axis-parallel wire 1a. It has a slightly larger radius of curvature and is formed so that it can be inserted into the gap between the parallel wire rods 1a. In the figure, the number of claw pieces (8 pieces) is the same as the number of gaps above.
6, and following the previous example, this is called a dummy winding drum. These claw pieces 6 are swingably held so that at least one of the longitudinal ends thereof can be freely attached and detached, and the diameter can be reduced or restored.
In the embodiment, the longitudinal end 11a of the claw piece 6 is formed so as to be fitted and held in the engagement hole 12 formed in the drive flange 5 in a manner that it can be freely attached and detached and can be contracted and restored. The claw piece itself is pivoted so as to be able to swing (diameter reduction/diameter return direction) as shown in FIG. 5, using a spherical bearing 7 formed on the driven flange 4 at the other end 11b as a fulcrum. That is, the tip 11a of the claw piece 6 forms a dummy winding drum Z (solid line) while being held in the engagement hole 12 formed in the drive flange 5, and the driven flange 4 is separated and is no longer supported by the engagement hole 12. When released, the diameter of the claw piece 6 is reduced by the weight of the claw piece 6 itself, using the spherical bearing 7 as a fulcrum (phantom lines in FIGS. 5 and 6). Although the claw piece 6 on the lower side cannot be expected to reduce its diameter due to its own weight, it becomes swingable (able to freely reduce its diameter) by being released from the support by the engagement hole 12. On the other hand, if the driven flange 4 is moved closer to the drive flange 5 and the tips 11a of the claw pieces 6 are pushed and expanded along the slopes of the engagement holes 12, the claw pieces 6 are held in a state where the diameter is reduced. A gap 13 formed near the left end 11b of the claw piece 6 is formed when the rear end 11 of the claw piece 6 is reduced in diameter.
It becomes an escape allowance for b.

As described above, in the winding device according to the present invention, the dummy winding drum Z having the same or slightly larger outer diameter of the winding drum of the cage-shaped spool can be arranged in the gap between the axis-parallel wire rods 1a. The wire 2 wound around the shaped spool is wound along the outer periphery of the dummy winding drum Z so as to draw a smooth arc. Therefore, the wound wire 2 does not have a bent portion as in the conventional case. When the winding operation is completed, the driven flange 4 is separated, the holding of the claw piece 6 is released, and the diameter of the tip 11a side of the claw piece 6 is reduced. That is, engagement hole 1
After the holding by 2 is released, the tip 1 of the claw group 6
1a can be reduced in diameter, and the group of claw pieces 6 are released from the enclosing force caused by the inner surface of the wound wire. When the diameter of the dummy winding drum Z is reduced in this way, it is released from the hugging force from the wire 2 that was applied during the wire winding, so that the cage-shaped spool can be easily pulled out from the claw group 6.

When winding the wire 2 around such a squirrel-cage spool, the tip of the wire 2 is hooked onto any one of the axis-parallel wires 1a constituting the winding drum 3, but in the present invention, as shown in FIG. As shown in the main part plan view), notches corresponding to the size of the bent portion at the tip of the wire are provided in the claw pieces 6 on both sides that sandwich the axis-parallel wire 1a to ensure workability in engaging the wire. A preferred embodiment is shown in which a fixing mechanism for the bent portion is provided to prevent the tip of the engaged wire from easily coming off. That is, the axis-parallel wire 1a into which the tip bent portion 15 of the wire 2 is introduced and engaged.
The claw pieces 6, 6 adjacent to the front side and the rear side, respectively, have cuts 6a, 6a, which are large enough to allow the bent end 15a and tip 15b of the bent part 15 to pass through and accommodate.
6b, and an engaged wire bent portion 15 is provided on the lower surface side of the notch 6a.
A wire fixture 9 is attached to press the wire member 1a against the inner surface of the axis-parallel wire member 1a so that the wire member 1a does not separate from the wire member 1a. The wire 2 is engaged with the wire tip engaging portion constructed in this manner in accordance with the procedure shown in FIGS. 8 and 9. First, the wire 2 is introduced from the position indicated by the broken line A (arrow A) so as to go over the axis-parallel wire 1a, and the bent portion 15 is inserted into the axis-parallel wire 1a.
Insert it into the inner circumference of a. Next, pull up the wire in the direction opposite to arrow A, pull up the bent portion 15 toward the axis-parallel wire 1a (arrow B), and pull the axis-parallel wire 1a from the open end side of the non-closed loop formed in the bent portion 15. Operate to push it into the loop. Occasionally, the narrowest portion of the bent end 15a is elastically deformed so as to be expanded by the axis-parallel wire 1a. In this way, the bent portion 15 becomes the axis-parallel wire rod 1a.
When engaged, the wire 2 is laid down in the direction of arrow C and laid along the outer peripheral surface of the dummy winding drum Z, as shown in FIG. Then, the tip of the bent end 15a passes through the notch 6a, hits the fixture 9, and is pushed back in the direction of arrow D, so that the bent part 15, housed in the notch 6a, is attached to the axis-parallel wire member 1a. It hugs you so it won't come off easily. Therefore, the wire 2 can be wound correctly along the dummy winding drum Z. It should be noted that when engaged with the fixture 9 so as to push up the bent portion 15, the bent end 15
A part of a (for example, 15c) must not exceed the outer peripheral surface line of the dummy winding drum Z. Therefore, if the part 15c of the bent part 15 exceeds the part 15c (especially if the wire diameter is large), the bending shape of the bent part 15 should be changed, or a spacer should be installed between the fixture 9 and the claw piece 6. 16 may be inserted to adjust the distance between the fixture 9 and the outer peripheral surface of the dummy winding drum Z. The shape of such a fixing tool 9 may be any other shape than that shown in the figure, and in short, it is a tongue-like shape that can push up a part of the bent portion 15 from the inner surface of the claw. Good to have. Note that 9a is a handle attached to the fixture 9, and even if the wire diameter changes, the leading edge of the bent wire remains attached to the fixture 9.
It is used to move the fixture 9 in the direction of arrow E by adjusting the bolt 20 so that it properly hits the top surface of the fixture.

Since the present invention is configured as described above, the following effects can be obtained.

Since the dummy winding drum is used only when winding the wire, no bends are formed in the wire wound around the cage-shaped spool.

After winding is completed, the dummy winding drum can be easily pulled out.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a cage-shaped spool applied to the winding device of the present invention, FIG. 2 is a sectional view of the spool, and FIG. 3 is a cross-sectional explanatory diagram illustrating the winding device of the present invention. Figure 4 is a sectional view taken along the - line in Figure 3, Figure 5 is an explanatory diagram of the main part, Figure 6 is a view corresponding to the - line in Figure 5, and Figure 7 is an enlarged view of the main part showing the fixing device of the present invention. The plan view and FIGS. 8 and 9 are sectional views of main parts. 2... Wire, 3... Winding drum, 4... Driven flange, 5... Driving flange, 6... Claw group, 7...
Spherical bearing.

Claims (1)

[Scope of utility model registration request] A winding device for winding welding wire around a cage-shaped wire winding spool with both flanges formed by combining wire rods, the winding device having a plurality of protruding pawls swingably provided. It consists of a driven flange and a driving flange in which a removable engagement hole is formed in the tip of each claw, and the outer peripheral surface of the claw is formed by a plurality of axis-parallel wire members that constitute the winding drum of the spool. The claw piece has a radius of curvature that is the same as or slightly larger than the circumscribed circle of the polygon that is formed, and the claw piece is divided in the circumferential direction between pitches disposed in the circumferential direction of the axis-parallel wire material, A welding wire winding device characterized in that a driven flange and a driving flange face each other and are configured to freely move forward and backward.