JP2546376B2 - Round cable manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a flat cable in which fusion-bonded portions and discrete wire portions are alternately provided and is continuously rolled into a spiral shape in a direction perpendicular to the longitudinal direction. The present invention relates to a method of manufacturing a round cable that can be manufactured.

[Prior Art] The present inventors previously formed a round cable in which a flat cable in which fusion-bonded portions and discrete wire portions are alternately provided is continuously rolled into a spiral shape in a direction perpendicular to the longitudinal direction. As a method for producing, the flat cable is fed out from a feeder that rotates in a direction of forming a spiral shape, and is passed through a spiral die having a hole having a cross-sectional shape of a spiral shape, and the flat cable with respect to its longitudinal direction. The inventor has invented a method for manufacturing a round cable which is formed by spirally rolling in a perpendicular direction.

At this time, the spiral die used has a shape as shown in FIG. Fig. 4 (1) is a left side view, (2)
Is a front view and (3) is a right side view showing the inlet side peripheral end surface 5
The entire inlet side spiral projection surface 6 including the root portion 7 and the tip portion 8 are provided on the same plane. In addition,
4 is a spiral hole.

[Problem to be Solved by the Invention] However, in the above-described conventional method for manufacturing a round cable, the inlet side peripheral end surface 5 of the spiral die and the inlet side spiral projection surface 6 forming the spiral hole 4 are formed. Since the whole is formed in a position on the same plane, the loose wire portion of the flat cable fed out from the feeder and inserted is hooked at the tip of the inlet-side spiral protrusion, and the fusion-bonded portion is torn off. However, there is a problem that the flat cable cannot be continuously rolled into a spiral shape.

It is an object of the present invention to provide a method for manufacturing a round cable, which is capable of remedying the above-mentioned drawbacks of the prior art and greatly improving the manufacturing efficiency of a flat cable having alternating fused portions and loose wire portions. .

[Means for Solving the Problem] The present invention provides a flat cable in which fusion-bonded portions and discrete wire portions are alternately provided from a feeder that rotates in a direction in which the flat cable is formed into a spiral shape, and has a cross-section. In a method for manufacturing a round cable, which is inserted and passed through a spiral die having a spiral hole, and the flat cable is rolled into a spiral shape in a direction perpendicular to a longitudinal direction, the spiral die has an inlet-side peripheral end. Provided so that the entire surface of the inlet-side spiral protrusion that forms the spiral hole is located inside, and a slope is formed in the direction of the outlet side from the root to the tip of the inlet-side spiral protrusion. It has been configured.

[Operation] In the present invention, the spiral die is provided so that the entire surface of the inlet-side spiral projection portion forming the spiral-shaped hole is located inside the surface of the inlet-side peripheral end portion, and the inlet-side spiral projection portion. With the configuration in which the inclination is formed in the direction of the outlet side face from the root portion to the tip portion, the discrete wire portion of the flat cable is not hooked on the tip portion of the inlet side spiral protrusion of the spiral die.
Therefore, the flat cable can be continuously rolled in a spiral shape while preventing the fusion portion from being torn, and the manufacturing efficiency can be significantly improved.

[Examples] FIG. 1 shows an embodiment of a method for manufacturing a round cable of the present invention, FIG. 2 shows an embodiment of a spiral die used in the present invention, and FIG. 3 shows the present invention. 1 shows an example of a round cable which is manufactured by and is rolled into a spiral shape.

1 is a flat cable, 2 is a rotary feeder, 3 is a spiral die, 4 is a spiral hole, 5 is an inlet side peripheral end surface, 6 is an inlet side spiral projection surface, and 7 is an inlet side spiral projection. Of the present invention, 8 is the tip of the inlet side spiral protrusion, 9 is the outlet side of the spiral die, 10 is a taping machine, 11 is a tape, 12 is an extruder, 13 is a sheath, and 14 is a winder.

The flat cable 1 in which the fusion-bonded portions and the discrete wire portions are alternately provided is formed into a spiral shape, and is rotated rightward to rotate the rotary feeder 2.
And is inserted into a carbon steel spiral die 3 having a hole 4 having a spiral cross section. Then, the flat cable 1 that passes while being gradually narrowed by the spiral die 3 is rolled into a spiral shape in the direction perpendicular to the longitudinal direction. A tape 11 is wound around the outer circumference of the flat cable 1 formed into a spiral shape by a taping machine 10, a sheath 13 is extruded on the outer circumference of the tape 11 by an extruder 12, and wound on a winder 14.

At this time, the spiral die 3 to be used is such that the entire inlet side spiral projection surface 6 forming the spiral hole 4 is positioned inside the inlet side peripheral end surface 5 and the inlet side spiral projection is formed. An inclination is provided from the root portion 7 to the tip portion 8 of the portion toward the outlet side surface 9 of the spiral die 3. Further, in order to smoothly insert the flat cable 1 into the spiral hole 4 and roll it into a stable spiral shape, the width of the hole 4 is gradually reduced from the inlet side to the outlet side, and the hole 4 Has a conical shape.

[Effects of the Invention] As described above, according to the method for manufacturing a round cable of the present invention, a spiral die for rolling and molding a flat cable in which fused portions and discrete wire portions are alternately provided is spirally wound. , The inlet side spiral projecting portion forming a spiral hole with respect to the inlet side circumferential end surface is provided so as to be located inside, and the outlet side surface extends from the root to the tip of the inlet side spiral projecting portion. Since the flat cable is formed so as to be inclined in the direction, the loose wire portion of the flat cable is not caught on the tip end portion of the spiral protrusion of the spiral die. Therefore, there is an effect that the flat cable can be continuously wound into a spiral shape while preventing the fusion portion from being torn, and the manufacturing efficiency can be significantly improved.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of a method for manufacturing a round cable of the present invention, FIG. 2 is a schematic explanatory view showing an embodiment of a spiral die used in the present invention, and FIG. FIG. 4 is a cross-sectional explanatory view showing an embodiment of a circular cable formed by rolling according to the present invention into a spiral shape, FIG. 4 is an explanatory view showing a conventional spiral die, and (1) is a left side view, 2) is a front view and (3) is a right side view. 1: Flat cable, 2: Rotary feeder, 3: Spiral die, 4: Spiral hole, 5: Inlet side peripheral edge surface, 6: Inlet side spiral protrusion, 7: Inlet side spiral protrusion surface , 8: tip of spiral side patent section of inlet side, 9: outlet side of spiral die, 10: taping machine, 11: tape, 12: extruder, 13: sheath, 14: winder.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Isamu Saito 5-1-1 Hidaka-cho, Hitachi-shi, Ibaraki Hidaka Plant, Hiritsu Electric Wire Co., Ltd. (72) Yoshinori Taisai Hidaka, Hitachi-shi, Ibaraki 5-1-1, Machi Hidaka Electric Cable Co., Ltd. Hidaka Factory (72) Inventor Mitsuo Kimoto 5-1-1 Hidaka-cho, Hitachi City, Ibaraki Hidaka Electric Cable Co., Ltd. Hidaka Factory (56) Reference Documents JP-A-62-37812 (JP, A) JP-A-2-284309 (JP, A)

Claims (1)

(57) [Claims] 1. A flat cable in which fusion-bonded portions and discrete wire portions are alternately provided is fed from a feeder that rotates in a direction for forming the flat cable into a spiral shape, and has a hole having a spiral cross-section. In a method of manufacturing a round cable in which the flat cable is inserted and passed through a spiral die and rolled into a spiral shape in a direction perpendicular to the longitudinal direction, the spiral die has a spiral hole more than the inlet side peripheral end surface. Is formed so that the entire surface of the inlet-side spiral protrusion is located inside, and an inclination is formed in the outlet side surface direction from the root to the tip of the inlet-side spiral protrusion. Manufacturing method of round cable.