JP2556548Y2 - Metal wire winding spool - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spool for winding a metal wire such as a welding wire.

[0002]

2. Description of the Related Art A metal wire such as a welding wire having a wire diameter of 0.8 to 2.4 mm is automatically wound on a spool to facilitate transportation and processing. As shown in FIG. 1, such a metal wire winding spool 1 includes a cylindrical body 2 and flanges 3 provided on both sides of the body 2. The trunk 2 is provided with a slot 5 extending in the circumferential direction and opening along the flange side surface 4.

In order to wind the wire 6 around the spool 1, first, the tip of the wire 6 is inserted into the slot 5, bent, and fixed to the spool 1. Next, the spool 1 is rotated, and the wire 6
Is wound into a plurality of layers. In order to wind a wire regularly and compactly on a spool, adjacent wires on the left and right of the same layer (row) are in close contact with each other, and the wire of the upper layer fits into the groove formed between the adjacent wires of the lower layer. It must be a so-called aligned winding. As a spool for aligning and rewinding a wire, there is a "spool for welding wire" disclosed in Japanese Utility Model Laid-Open Publication No. 2-46785. In this spool, the amount of the flange provided on both sides of the spool to fall inside the outer edge is limited to prevent winding disturbance.

[0004]

In recent years, a polypropylene spool having a low hardness has been used in place of polystyrene in terms of cost for the synthetic resin used for the spool. When the wire is wound on such a spool, the flange is spread outward, and the wire is hardly inserted into the lower wire. Although it is conceivable to increase the thickness of the flanges or the thickness of the radial ridges called ribs to reinforce them, the advantage of replacing the polypropylene spools in terms of cost is lost.

In view of this, as shown in FIG. 2, the flange is formed so that the amount of inward fall of the outer periphery of the flange is made larger than before and the metal wire wound for the purpose of preventing disturbance during transportation is tightened inside. Need to bend in slightly. Therefore, when the wire is wound around the spool, the wire hits the front end of the flange of the spool. At the beginning of the winding of the wire, as shown in FIG. 3A, θ (the angle at which the wire hits the flange end and is bent) is small, so that the wire can be reliably wound to the flange end. However, as the winding of the wire reaches the upper layer, as shown in FIG. 3B, the distance L from the tip of the flange to the surface to be wound becomes shorter, so that θ becomes relatively large, and the end of the flange reaches the flange end. It is not wound securely,
Turbulence occurs. In such a case, rewinding is performed, and rewinding is performed manually while pressing the wire rod with a piece of wood or the like. Therefore, it has been difficult to completely automate the winding of the wire.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a metal wire winding spool which can automatically wind a wire in an aligned winding state. It is.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a metal wire winding spool for rewinding a metal wire, the entirety of the inner peripheral end of the flange provided on both sides of the body of the spool. It is characterized in that it has a taper of 5 to 10 mm from the inner end of the flange outer periphery to the trunk portion over the circumference and 1 to 3 mm from the inner end of the flange outer periphery.

[0008]

The present invention will be described below in detail. FIG. 4 (a),
As shown in (b), the taper is applied to the inside end of the flange outer peripheral portion, so that even when the wire hits the flange end, θ (the angle at which the wire hits the flange end and bends) also when the upper layer is wound. Small, no turbulence.
If the length A of the taper from the inner end of the flange outer peripheral portion toward the trunk portion is less than 5 mm, θ becomes large and turbulence occurs. On the other hand, if it exceeds 10 mm, the flange portion 3 becomes thin, and the spool may be damaged during transportation. If the length B from the inner end of the flange outer portion to the outer direction is less than 1 mm, the wire will hit the front end of the flange, θ will increase, and winding disturbance will occur. On the other hand, if it exceeds 3 mm, the tip of the flange becomes thin, the strength of the spool decreases, and the spool may be damaged during transportation. Therefore, the taper of the inner peripheral end of the flange needs to be 5 to 10 mm from the inner distal end of the flange toward the trunk, and 1 to 3 mm from the inner distal end of the flange outer side.

[0009] If the amount of inward fall of the flange outer peripheral portion is small, when winding the wire, the flange expands and winding is disturbed. Conversely, if the amount is large, the angle θ when the wire hits the front end of the flange becomes large, and the winding becomes turbulent. Therefore, the distance inside the front end of the flange outer periphery is 0.5 to 1. It is preferable that the flange falls inward by 5 mm and the flange is slightly curved.

[0010]

FIG. 4 (a) shows a spool having a shape as shown in FIG. 1 and a taper at the inner end of the outer periphery of the flange as shown in FIG. The length from the inside tip to the outside direction is B
Eleven types of polypropylene spools having the dimensions shown in Table 1 were prototyped. The size of the spool 1 was such that the outer diameter of the flange 3 was 270 mm, and the thickness of the flange was 5 mm at the portion in contact with the body portion and gradually decreased in the outer peripheral direction, and the minimum portion was 3.5 mm. The outer diameter of the body 2 was 148 mm and the thickness was 3.5 mm. Further, the amount of the inward fall of the flange outer peripheral portion was 1.0 mm lower than the distance between both flanges of the body portion, and the flange was slightly bent.

50 coils (1,000 kg of wire) each of 20 kg of a solid wire having a wire diameter of 1.2 mm of YGW11 specified in JIS Z3312 were automatically wound on the spool. After the solid wire was wound on the spool in each test, the number of occurrences of turbulence was checked.
After transporting km, the damage of the spool was checked. Table 1 shows the results.

[0012]

[Table 1]

As is clear from the results shown in Table 1, all of Test Examples 1 to 4 of the present invention were extremely satisfactory without occurrence of turbulent winding and breakage of the spool after transportation.
In Test Example 5 in the comparative example, five coils with turbulence occurred in an example in which neither taper A nor B was used. Test Example 7 has a short taper A, so Test Example 9 has a small taper B. Test Example 11 has a short taper A and a small taper B.
A turbulence occurred. In Test Example 6, the taper A was too long, and in Test Example 8, the taper B was large. In Test Example 10, since the taper A was too long and the taper B was large, turbulence did not occur. In the test, there was a spool whose flange was broken.

[0014]

As described above, according to the spool for winding a metal wire of the present invention, since the taper is provided over the entire periphery of the inner end of the flange outer periphery, winding disturbance at the end of the flange occurs. In addition, the wire can be automatically wound in an aligned winding state, and is prevented from being damaged during transportation, and is economical.

[Brief description of the drawings]

FIG. 1 is a perspective view when a wire is started to be wound.

FIG. 2 is a cross-sectional view of a spool showing a state where an outer peripheral portion of a flange is tilted inward.

FIG. 3A is a diagram showing a winding state of a lower layer portion, and FIG.
FIG. 3 is a view showing a winding state of an upper layer portion.

4A is a cross-sectional view showing a distal end of an outer peripheral portion of a flange of a spool of the present invention, and FIG. 4B is a cross-sectional view showing a state where a wire is wound around the spool of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spool 2 Body 3 Flange 4 Flange side face 5 Slot 6 Wire rod A Length from flange inner peripheral tip to trunk direction B Length from flange outer peripheral inner tip to outer direction θ Wire hits flange end Bend angle

Claims (1)

(57) [Scope of request for utility model registration] 1. A spool for winding a metal wire, which rewinds a metal wire, from the inner edge of the flange to the body in the direction of the body from the inner edge of the flange to the body. A spool for winding a metal wire, characterized in that the spool has a taper of 1 to 10 mm and a taper of 1 to 3 mm from an inner tip of an outer periphery of a flange to an outer direction.