Coating removing method for cable and coating removing device for cable

Patent metadata

Field	Value
Publication number	US-11522350-B2
Application number	US-202017005844-A
Country	US
Kind code	B2
Filing date	Aug 28, 2020
Priority date	Aug 29, 2019
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

There is provided a coating moving method for a cable that removes a coating at a terminal portion of a cable, including a step of applying a pressing force having such a magnitude that a cutting edge stops at a position before reaching the core wire to the cutting blade to make an incision on the coating by the cutting blade, a step of twist-cutting an uncut portion of the coating between the cutting edge of the cutting blade and the outer periphery of the core wire by rotating the coating on a distal end side from an incision position with respect to the coating on a base end side, and a step of removing the coating on the distal end side from the incision position by gripping and pulling out the coating on the distal end side from the incision position to expose the core wire.

First claim

What is claimed is:

1. A coating removing method for a cable that removes a coating on an outer periphery of a core wire at a terminal portion of a cable using a coating removing device for a cable,
the device including:
an urging mechanism configured to apply a pressing force in a cutting direction to a cutting blade;
a rotation mechanism configured to rotate a part of the coating of the cable;
a gripping mechanism configured to grip a part of the coating of the cable; and
a pulling-out mechanism configured to pull out the same coating, the method comprising:
a cutting step of applying, to the cutting blade and the gripping mechanism, a pressing force, having such a magnitude that a cutting edge stops at a position before reaching the core wire, by the urging mechanism to make an incision on the coating by the cutting blade;
a twist-cutting step of twist-cutting an uncut portion of the coating between the cutting edge of the cutting blade and the outer periphery of the core wire by rotating the coating on a distal end side from an incision position around an axis of the cable with respect to the coating on a base end side by the rotation mechanism; and
a stripping step of removing the coating on the distal end side from the incision position by gripping and pulling out the coating on the distal end side from the incision position by the gripping mechanism and the pulling-out mechanism to expose the core wire,

wherein the stripping step comprises opening, from the position, the cutting blade radially outward and away from the coating while maintaining a grip on the coating by the gripping mechanism.

2. The coating removing method for a cable according to claim 1 ,
wherein in the twist-cutting step, the cutting blade is opened in a state in which the coating on the distal end side with respect to the incision position is gripped by the gripping mechanism, and the gripping mechanism is rotated around the axis of the cable by the rotation mechanism.

3. The coating removing method for a cable according to claim 1 ,
wherein in the twist-cutting step, while keeping the pressing force applied to the cutting blade at the end of the cutting step, the cutting blade is rotated around the axis of the cable by the rotation mechanism to rotate the coating on the distal end side with respect to the coating on the base end side from the incision position due to friction generated between the cutting blade and the coating, and therefore a twisting torque is introduced into the uncut portion of the coating between the cutting edge of the cutting blade and the outer periphery of the core wire to twist-cut the uncut portion.

4. The coating removing method for a cable according to claim 3 ,
wherein with the torque larger than a required torque for twist-cutting the uncut portion of the coating between the cutting edge of the cutting blade and the outer periphery of the core wire after the cutting step, an incision depth of the cutting blade is calculated as a condition for rotating the coating on the distal end side with respect to the coating on the base end side from the incision position, and in the cutting step, the pressing force capable of realizing the calculated incision depth is applied to the cutting blade by the urging mechanism.

5. A coating removing device for a cable that removes a coating on an outer periphery of a core wire at a terminal portion of a cable, the coating removing device for a cable comprising:
a rotary head configured to rotate around a rotation axis set at a fixed position;
a rotation mechanism configured to rotationally driving the rotary head;
a cable holding mechanism configured to hold and fix the terminal portion of the cable in front of the rotary head with being aligned with the rotation axis and a distal end of the cable facing a rear side of the rotary head;
a cutting blade mounted on the rotary head so as to be displaceable in a radial direction of the rotary head, and configured to cause a cutting edge to make an incision on the coating at the terminal portion of the cable by displacing radially inward;
a gripping mechanism arranged on the more distal end side of the cable than the cutting blade and configured to grip the coating;
an opening and closing mechanism configured to open the cutting blade and the gripping mechanism radially outward and close the cutting blade and the gripping mechanism radially inward;
an urging mechanism configured to apply a pressing force in a cutting direction to the cutting blade and gripping mechanism during a closing operation by the opening and/or closing mechanism; and
a pulling-out mechanism having a function of relatively moving the rotary head and the cable holding mechanism along a rotation axis direction and configured to strip off the coating on the distal end side from the incision position by positioning the cutting blade and the gripping mechanism with respect to the cable in an axis direction by moving and stopping and by moving the rotary head and the cable holding mechanism in a direction in which they are separated from each other with the gripping mechanism gripping the coating at the terminal portion of the cable,.
wherein the opening and closing mechanism and urging mechanism are further configured to stop the cutting blade at a position before reaching the core wire and, from the position, open the cutting blade radially outward and away from the coating while maintaining a grip on the coating by the gripping mechanism.

6. The coating removing device for a cable according to claim 5 ,
wherein at least one of a spring and a fluid pressure cylinder is provided as the urging mechanism.

7. The coating removing device according to claim 5 ,
wherein the pulling out mechanism is further configured to strip off the coating in a state in which the opening and/or closing mechanism has opened the cutting blade radially outward and away from the coating while maintaining the grip on the coating by the gripping mechanism.

Assignees

• Yazaki Corp

Inventors

• KATOU Sanae

Classifications

• H02G1/1256 Primary

  using wire or cable-clamping means · CPC title

• H02G1/127

  Features relating to cutting elements · CPC title

• H02G1/1265 Primary

  the cutting element rotating about the wire or cable (making longitudinal and transverse or helical cut H02G1/1268) · CPC title