JPH11123456A - Compact coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably and excellently deliver a wire by defining the angle between the inside surface of a compact coil whose wire is delivered from the inside and a perpendicular as a specified value. SOLUTION: The shape of the compact coil 11 is a cylindrical shape in the inside of which the space part 12 in the inside of the compact coil is present. The shape of the space part 12 is a truncated cone shape. Making a larger side of the inside diameter of the space part 12 upside, the compact coil 11 is perpendicularly arranged on a pedestal and the wire 13 is upward delivered from the inside of the compact coil 11. The angle a formed with the inside surface 14 of the compact coil in the space part 12 and perpendicular 15 is taken as 5-7 deg.. It is especially desirable for the angle α to be 5-6 deg.. The wire 13 is desirable to be a metallic wire such as an iron wire, copper wire and aluminum wire. It is especially desirable for the wire 13 to be the copper wire or a copper alloy wire.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact coil having excellent wire feedability.

[0002]

2. Description of the Related Art Conventionally, a wire has been wound up using a winding jig such as a bobbin, a spool, a stand, and the like, and the wire has been fed out with the winding jig attached. 2. Description of the Related Art In recent years, lightweight and compact coils that use a winding jig after winding have been used for copper wires and the like. This compact coil 11
Is a cylindrical shape having a space portion 12 inside, as shown in FIG. 2, and the shape of the space portion 12 is a truncated cone shape. When the wire 13 of the compact coil 11 is drawn into, for example, a thin wire, the compact coil is arranged vertically with the larger inner diameter facing upward, and the wire 13 is a compact coil.
It is fed upward from inside 11 and supplied to a wire drawing machine (not shown). The ratio (volume ratio) of the wire portion to the volume of the compact coil including the space portion 12 is usually increased to 60% or more, so that the coil is reduced in size.

[0003] A process for manufacturing the compact coil will be described below with reference to FIGS. The drawn wire is wound into a coil on a disassembly spooler (winding jig) 16 having a slightly tapered body 17. After the wire wound in a coil shape is bound by a metal band 18 (FIG. 3A), it is rotated 90 degrees (FIG. 3B), and the disassembly spooler 16 is removed (FIG. 3C). 19 (FIG. 3D), the lower part is wrapped with a film 20 in the suspended state (FIG. 3E), and then placed on a pedestal 21 and the upper part is wrapped (FIG. 3F). It is fixed by the hanging sponge 22 (FIG. 3G) and shipped or stored. In the state shown in FIG. 3D, there is also a case where the wire is carried to another wire drawing machine and drawn as it is into a fine wire.

[0004]

By the way, when the wire is fed out from the inside of the compact coil, after leaving the winding position, the wire drops once below the coil while maintaining the loop shape, and is then fed out above the coil. I will go. At this time, in the current compact coil, the rear wire may drop downward and be fed out before the front wire, and the reversal of the front and rear is performed as shown in FIG.
As a result, the operation is interrupted and the productivity is reduced. For this reason, the present inventors have conducted extensive experiments on the prevention of entanglement and found that the inner surface 14 of the compact coil 11 shown in FIG.
It has been found that the magnitude of the angle α formed by the angle and the perpendicular 15 has a causal relationship with the occurrence of entanglement, and further research has led to the completion of the present invention. An object of the present invention is to provide a compact coil capable of stably and favorably feeding a wire.

[0005]

According to the first aspect of the present invention,
A compact coil having a space portion on the inside and paying out a wire from the inside, wherein an angle α between an inner surface of the compact coil and a perpendicular is 5 to 7 degrees.

According to a second aspect of the present invention, there is provided the compact coil according to the first aspect, wherein the wire is a copper wire or a copper alloy wire.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a compact coil formed by winding a wire into a coil shape having a space portion inside so that the space portion gradually increases in inner diameter from bottom to top. The wire can be smoothly fed out. In the present invention, the reason why the angle α formed between the inner surface of the compact coil and the perpendicular is set to 5 to 7 degrees is that if the angle is less than 5 degrees, entanglement of the wire cannot be sufficiently prevented. On the other hand, if it exceeds 7 degrees, the volume ratio of the wire is reduced, and the compact coil cannot be sufficiently reduced in size. The reason that the entanglement is prevented when the angle α is set to 5 degrees or more is considered to be that the difference between the loop diameters of the loops of the wire rod when it is fed becomes large. It is particularly desirable that the angle α be 5 to 6 degrees. Even if the present invention is applied to a compact coil having a volume ratio of less than 60%, the effect is sufficiently exhibited. The present invention is effective when applied to a metal wire such as an iron wire, a copper wire, and an aluminum wire, but the effect is best exhibited particularly in a copper wire or a copper alloy wire.

[0008]

The present invention will be described below in detail with reference to examples. (Example 1) Copper wire 8000 having a circular section of 1.3 mm in diameter
0 m, the inner diameter of the coil lower surface is 380 mm, the coil height is 520 mm, and the angle α (see FIG. 1) between the inner surface of the coil and the vertical line is variously changed in the range of 0 ° to 7 ° and wound on a compact coil. Was. The space factor at this time is 65 to 70
%Met. For each of the obtained compact coils, a feeding test was performed over the entire length at a linear speed of 90 m / min, and the number of occurrences of entanglement of the copper wire during that time was examined. Table 1 shows the results.

[0009]

[Table 1]

As is clear from Table 1, no entanglement occurred in any of the compact coils of the examples of the present invention, and the wire could be stably fed out. On the other hand, in the comparative example, entanglement occurred multiple times in each case. Entanglement increased as the angle α was smaller.

(Embodiment 2) A copper wire having a circular cross section of 2.0 mm in diameter and 65000 m in diameter was used.
The coil height was set to 570 mm, and the angle α (see FIG. 1) between the inner surface of the coil and the perpendicular was varied in the range of 0 ° to 7 ° and wound around a compact coil. The space factor at this time was 70 to 75%. For each of the obtained compact coils, a payout test was performed over the entire length at a linear speed of 60 m / min, and the number of occurrences of entanglement of the copper wire during that time was examined. Table 2 shows the results.

[0012]

[Table 2]

As is clear from Table 2, none of the compact coils of the present invention were entangled, and the wire could be fed out stably. On the other hand, in the comparative example, the entanglement occurred multiple times in each case, and the entanglement increased as the angle α was smaller.

(Embodiment 3) A copper wire having a diameter of 2.6 mm and a circular cross section of 42000 m was used.
The coil height was set to 570 mm, and the angle α (see FIG. 1) between the inner surface of the coil and the perpendicular was varied in the range of 0 ° to 7 ° and wound around a compact coil. The space factor at this time was 70 to 75%. For each of the obtained compact coils, a feeding test was performed over the entire length at a linear speed of 90 m / min, and the number of occurrences of entanglement of the copper wire during that time was examined. Table 3 shows the results.

[0015]

[Table 3]

As is clear from Table 3, the compact coil of the present invention did not cause any entanglement, and the wire could be fed stably. On the other hand, in the comparative example, the entanglement occurred multiple times in each case, and the entanglement increased as the angle α was smaller.

[0017]

As described above, the compact coil of the present invention can stably unwind a wire without causing entanglement, has excellent productivity, and has a remarkable industrial effect.

[Brief description of the drawings]

FIG. 1 shows the angle α between the inner surface of a compact coil and a perpendicular line
FIG.

FIG. 2 is an explanatory diagram showing a situation when a wire is fed from a compact coil.

FIGS. 3A to 3G are explanatory diagrams of a process of producing and packing a compact coil.

FIG. 4 is an explanatory diagram showing a situation where wires are entangled.

[Explanation of symbols]

 11 Compact coil 12 Space inside compact coil 13 Wire rod 14 Compact coil inner surface 15 Perpendicular line 16 Disassembly spooler 17 Body 18 Metal band 19 Hanging device 20 Film 21 Base 22 Sponge 23 Outer cover

Claims (2)

[Claims] 1. A compact coil having a space inside and a wire rod fed out from the inside, wherein an angle α between an inner surface of the compact coil and a perpendicular is 5 to 7 degrees. 2. The compact coil according to claim 1, wherein the wire is a copper wire or a copper alloy wire.