JP4885045B2 - Covered wire joint discharge device and discharge method - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint wire discharging device and a discharging method for a covered wire, and in particular, a joint wire discharging device and a discharge device for a covered wire in which it is difficult to identify the joint portion from the outside, such as a covered wire covered with an insulating resin. Regarding the method.

  FIG. 6 is an explanatory view schematically showing an example of a manufacturing process of a covered electric wire.

  As shown in FIG. 6, in the manufacturing process of the covered electric wire W1, the conducting wire 51 sent from the supply drum 50 is moved along the axial direction from the left side to the right side in FIG. The covering material is extruded to form a covering layer on the surface of the conducting wire 51, and then cooled by passing through a cooling water tank 53 to obtain a covered wire W1. The obtained covered electric wire W <b> 1 is wound by the winder 55 after detecting the defective portion of the covering layer by the spark detector 54.

  When the defective part of the coating layer is detected by the spark detector 54, the winding of the product is stopped and only the defective part is discharged to the outside.

  By the way, if the conducting wire 51 wound around the supply drum 50 disappears, the drive of the extruder 52 must be stopped once and the supply drum 50 must be replaced, resulting in poor work efficiency and yield. Therefore, two supply drums 50 are prepared, and the conductors 51 wound around the supply drums 50 are joined to each other, thereby enabling the production of the covered electric wire W1 without stopping the driving of the extruder 52, and working efficiency. And the deterioration of the yield is prevented.

  However, joint parts joined by cold welding or electric welding have poor mechanical strength compared to non-joint parts and cannot be shipped as products, so the joint part is detected and the part corresponding to the joint part is discharged. There must be. Moreover, since the joint part is coat | covered with the coating layer, it is difficult to identify a joint part from the outside.

Therefore, for example, in Patent Document 1, even if it is difficult for the joint portion to be identified from the outside by the coating layer, a magnetic material is attached to the joint portion, and the magnetic material is detected magnetically. A method for identifying a joint portion by marking the portion has been proposed (hereinafter, this technique is referred to as a conventional example).
Japanese Unexamined Patent Publication No. 57-208090

  In the conventional example, the part where the coated electric wire is marked is taken up by the winder together without being distinguished from the non-joint part, so the work of discharging the joint part needs to be performed separately. It was bad.

  The present invention has been made in order to solve the above-described problems, and in the usual process of detecting and discharging the defective portion of the coating layer, the joint portion is simultaneously detected and discharged, thereby improving workability. It aims at providing the joint part discharge device and discharge method of a covered electric wire which can aim at improvement.

The joint part discharging apparatus for a covered electric wire according to the present invention includes a joint part in which ends of the conducting wires are joined to each other, and the joint part discharging apparatus for the covering electric wire configured by covering the surface of the conducting wire with a covering layer,
A magnetic material is wound around the joint part,
Magnetic body detection means for detecting the presence or absence of the magnetic body from the outside of the covered electric wire;
A coating layer defect detecting means for detecting a defect portion of the coating layer of the coated electric wire;
Discharging means for discharging the defect portion of the coating layer detected by the coating layer defect detection means;
A notch forming means for inserting a notch portion in which the defect portion of the covering layer can be detected by the covering layer defect detecting means at a portion of the covering layer of the covered electric wire detected by the magnetic substance detecting means as having the magnetic substance; ,
It is characterized by having.

  It is preferable that the magnetic body is wound around a joint portion formed by partially cutting a plurality of strands exposed from the end portion of the conducting wire and connecting the remaining strands. .

The joint part discharge method of the covered electric wire of the present invention includes a joint part in which ends of the conductive wires are joined, and the joint part discharge method of the covered electric wire configured by covering the surface of the conductive wire with a covering layer,
(1) winding a magnetic body around the joint;
(2) detecting the presence or absence of the magnetic body from the outside of the covered electric wire;
(3) a step of detecting a defective portion of the covering layer of the covered electric wire;
(4) discharging the detected defective portion of the coating layer;
(5) A notch that can detect a defective portion of the covering layer in the step of (4) is formed in the portion of the covering layer of the covered electric wire that is detected as having a magnetic substance in the step of (2). A process of adding,
It is characterized by having.

  According to the first and third aspects of the present invention, since the joint portion can be detected and discharged simultaneously in the process of detecting and discharging the defective portion of the coating layer that is normally performed, the joint portion is discharged. This special process is unnecessary, and the workability can be further improved.

  According to the invention according to claim 2, since the outer diameter of the joint portion around which the magnetic material is wound is equal to or smaller than the outer diameter of the conducting wire, the joint portion can be prevented from becoming thicker than the non-joint portion, and the movement of the covered electric wire can be prevented. Can be smooth.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1A is an explanatory view showing a configuration of a joint portion discharging apparatus for a covered electric wire according to an embodiment of the present invention, and FIG. 1B is a side sectional view of the covered electric wire.

  As shown in FIGS. 1 (A) and 1 (B), a joint part discharging apparatus A for a covered electric wire W according to an embodiment of the present invention is, for example, a conductive wire 2 delivered from a supply drum 1 in the manufacturing process of the covered electric wire. 1 is used to detect and discharge the joint portion 3 of the covered electric wire W formed by covering the surface of the conductive wire 2 with the coating layer 5 by the extruder 4.

  This joint part discharging apparatus A is a magnetic body detector 7 (magnetic body detecting means) for detecting the presence or absence of the magnetic body 6 from the outside of the covered electric wire W in which the magnetic body 6 is wound around the joint section 3 where the conducting wires 2 are joined. A spark detector 8 (covering layer defect detecting means) for detecting a defective portion of the covering layer 5 of the covered electric wire W, and a winder 9 (discharging means) for discharging the defective portion of the covering layer 5 detected by the spark detector 8 And a notch forming machine 11 (notch forming means) for inserting the notch 10 into the portion of the covering layer 5 of the covered electric wire W detected by the magnetic substance detector 7 as having the magnetic substance 6.

  The magnetic body detector 7 and the notch forming machine 11 are arranged between the extruder 4 and the cooling water tank 12.

  2A to 2D are explanatory views showing a process of winding the magnetic body 6 around the joint portion 3.

  First, a plurality of strands 2a (see FIG. 2 (A)) exposed from the end portion of the conducting wire 2 are cut approximately 1/3 in the radial direction (see FIG. 2 (B)). For example, when the number of the strands 2a is 6, the outer two are cut from the root.

  Next, the remaining strands 2a are joined together by cold welding, electric welding, or the like to form the joint portion 3 (see FIG. 2C).

  Next, a magnetic body 6 such as a wire or piano wire made of iron or an iron-based alloy is wound around the joint 3 (see FIG. 2D). In that case, it is preferable to wind so that the magnetic body 6 may not protrude from the joint part 3.

  As a result, the outer diameter of the joint portion 3 around which the magnetic body 6 is wound is equal to or smaller than the outer diameter of the conductor 2, so that the joint portion 3 can be prevented from becoming thicker than the non-joint portion, and the covered wire W can be moved smoothly. Can be.

  FIG. 3 is an explanatory view showing an example of the magnetic substance detector 7. As shown in FIG. 3, the magnetic body detector 7 includes a magnetic field generator 7 b that generates a high-frequency magnetic field inside a through-hole 7 a through which the covered electric wire W passes, and a magnetic body wound around the joint portion 3 of the covered electric wire W. And a control unit 7c that analyzes whether or not the balance of the magnetic field has changed due to the passage of 6 by comparing with a reference value.

  When the balance of the magnetic field is lost and the passage of the magnetic body 6 is detected, the control unit 7 c transmits a detection signal S to the notch forming machine 11.

  FIG. 4 is an explanatory view showing an example of the notch forming machine 11.

  As shown in FIG. 4, the notch forming machine 11 is in contact with the surface of the covered electric wire W and has a gear-like notch roller 11 a that puts the notched part 10 in the covering layer 5, and a control part 7 c of the magnetic substance detector 7. And a moving member 11b that moves the cutting roller 11a in the direction of the arrow so as to contact the surface of the covered electric wire W when the detection signal S is received.

  The time from when the magnetic body 6 of the joint portion 3 is detected by the magnetic body detector 7 to when the cut portion 10 is inserted into the covering layer 5 of the covered wire W by the notch forming machine 11 is determined by the moving speed and magnetic properties of the covered wire W. It is calculated in consideration of the distance between the body detector 7 and the notch forming machine 11.

  The cut portion 10 is inserted about 1 m to 5 m before and after the joint portion 3 at the calculated timing. As shown in FIG. 1B, the spark detector 8 generates a spark between the lead wire 2 and the inside. Formed to a depth.

  In FIG. 4, reference numeral 11 c denotes a support roller that supports the covered electric wire W.

  As the spark protector 8 and the winder 9, the same ones as the spark protector 54 and the winder 55 used in the manufacturing process of the covered electric wire shown in FIG. 6 are used as they are.

  Next, operation | movement of the joint part discharge | emission apparatus A of the covered electric wire which concerns on the example of embodiment of this invention is demonstrated.

  First, the magnetic body detector 7 detects the presence or absence of the magnetic body 6 from the outside of the covered electric wire W.

  Next, when the magnetic body detector 7 detects that the magnetic body 6 is present, the magnetic body detector 7 transmits a detection signal S from the control unit 7 c to the notch forming machine 11.

  Next, the notch forming machine 11 that has received the detection signal S from the magnetic substance detector 7 puts the notch 10 into the portion of the covering layer 5 of the covered electric wire W at a desired timing.

  The covered electric wire W into which the cut portion 10 is inserted is cooled through the cooling water tank 12 and then sent to the spark detector 8.

  5A to 5E are explanatory views for explaining the discharging operation of the joint portion 3.

  The joint portion 3 is detected by detecting the cut portion 10 which is a defect of the coating layer 5 by the spark detector 8 (see FIG. 5A).

  Next, the winding of the product 13 is stopped and the product 13 is discharged (see FIG. 5B).

  Next, only the vicinity 14 of the joint 3 is wound up (see FIG. 5C) and discharged to the outside (see FIG. 5D).

  Thereafter, the winding of the product 15 is newly started (see FIG. 5E).

  According to the joint wire discharging device A according to the embodiment of the present invention, the magnetic body 6 is wound around the joint portion 3, and the magnetic body detector 7 detects the presence of the magnetic body 6. The cut portion 10 is inserted into the portion of the coating layer 5 by the cut forming machine 11, the cut portion 10 and the joint portion 3 are detected as defects of the coating layer 5 by the spark detector 8, and the vicinity of the joint portion 3 is detected by the winder 9. Only 14 is wound and discharged outside. As a result, it is possible to simultaneously detect and discharge the joint portion 3 in the process of detecting and discharging the defective portion of the coating layer 5 that is normally performed, so that a special step for discharging the joint portion 3 is unnecessary. Thus, workability can be further improved.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical matters described in the claims.

  The present invention is used for discharging the joint portion 3 of the covered electric wire W that is difficult to identify from the outside, such as a covered electric wire.

(A) is explanatory drawing which shows the structure of the joint part discharge | emission apparatus of the covered electric wire which concerns on the embodiment of this invention, (B) is side sectional drawing of a covered electric wire. (A)-(D) are explanatory drawings which show the process of winding a magnetic body around a joint part. It is explanatory drawing which shows an example of a magnetic body detector. It is explanatory drawing which shows an example of a notch forming machine. (A)-(E) are explanatory drawings for demonstrating discharge operation | movement of a joint part. It is explanatory drawing which shows an example of the manufacturing process of a covered wire | line roughly.

Explanation of symbols

W: Coated electric wire A: Joint part discharging device 1: Supply drum 2: Conductor wire 3: Joint part 4: Extruder 5: Coating layer 6: Magnetic substance 7: Magnetic substance detector 8: Spark detector 9: Winding machine 10: Cut section 11: Cut forming machine 12: Cooling water tank 13: Product 14: Neighborhood part 15: Product

Claims (3)

In a joint part discharging device for a covered electric wire, comprising a joint part obtained by joining ends of conductive wires, and covering the surface of the conductive wire with a coating layer,
A magnetic material is wound around the joint part,
Magnetic body detection means for detecting the presence or absence of the magnetic body from the outside of the covered electric wire;
A coating layer defect detecting means for detecting a defect portion of the coating layer of the coated electric wire;
Discharging means for discharging the defect portion of the coating layer detected by the coating layer defect detection means;
A notch forming means for inserting a notch portion in which the defect portion of the covering layer can be detected by the covering layer defect detecting means at a portion of the covering layer of the covered electric wire detected by the magnetic substance detecting means as having the magnetic substance; ,
A joint part discharging apparatus for a covered electric wire, comprising:   The magnetic body is wound around a joint portion formed by partially cutting a plurality of strands exposed from an end portion of the conducting wire in a radial direction and connecting the remaining strands to each other. The joint part discharging apparatus for a covered electric wire according to claim 1. In the joint part discharging method of the covered electric wire, comprising a joint part in which ends of the conducting wires are joined to each other, and covering the surface of the conducting wire with a coating layer,
(1) winding a magnetic body around the joint;
(2) detecting the presence or absence of the magnetic body from the outside of the covered electric wire;
(3) a step of detecting a defective portion of the covering layer of the covered electric wire;
(4) discharging the detected defective portion of the coating layer;
(5) A notch that can detect a defective portion of the covering layer in the step of (4) is formed in the portion of the covering layer of the covered electric wire that is detected as having a magnetic substance in the step of (2). A process of adding,
A method for discharging a joint portion of a covered electric wire, comprising:

Images