JP2001309522A - Processing method of shielded wire terminal and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain efficient processing of a shielded wire terminal. SOLUTION: This device is disposed with a tubular inner blade 1 having a radius larger than a half of the outer diameter of a shielded wire W by at least the thickness of a braid S3, and forming a cutting edge around the outer peripheral edge, a horizontal holder 2 therefor; and a driving mechanism 3 chucking the inner blade 1 for moving it to-and-fro. It is also disposed with the tubular outer blade 1, coaxially with the inner blade 1 on the right thereof, having an internal diameter slightly larger than the external diameter of the inner blade 1, and forming a cutting edge around the inner peripheral edge of the end facing the inner blade and, on the right thereof, a chuck 7 for holding the shielded wire W coaxially with the inner blade 1 with the front end of the braid S3 opened. The inner blade 1 is moved toward the outer blade 6 by the driving mechanism 3 for cutting the braid S3 in cooperation with the outer blade 6. With the inner blade 1 moved further, the whole rest of the exposed braid S3 is pressed against the outer covering S4 of the shielded wire W for inverting it by the inner surface of the inner blade 1, and the inner blade 1 is then moved in an opposite direction to draw out the wire W.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to processing of a terminal of a shielded electric wire (coaxial cable).

[0002]

2. Description of the Related Art An end processing of an electric wire generally involves a plurality of processing steps. For example, a single-core covered electric wire requires at least two steps of peeling and terminal mounting, and the above-mentioned shielded electric wire and a multi-core covered electric wire require more processing steps.

[0003] shielded cable, as shown in FIG. 5, the center conductor S ₁ comprising a plurality of fine copper wire or the like coated with inner insulator S ₂ made of polyvinyl chloride or the like, the outer large number of fine copper wire, etc. The structure is such that the braided shield braid S ₃ (hereinafter simply referred to as the braid S ₃ ) and the insulating outer cover S ₄ are covered in this order.

[0004] In the end processing of this shielded electric wire W (hereinafter sometimes simply referred to as the electric wire W), the outer sheath S of the end portion is formed.
₄ stripped predetermined length, yet inverts the braid S ₃ cut into or suitable length tuck on the circumferential surface of the outer skin S _4, and thereafter, a predetermined length inside the insulator S ₂ exposed exposing the central conductor S ₁ peeled is, the number of steps is very much the so on.

[0005] At that time, the inversion or cutting of the braid S _3, the actual in the manufacturing site, the extra amount so as not to invert the Henmoto S ₃ of (range braid S ₃ in the length direction of the wire W) or inverted on cut beforehand braid S ₃ in moderate amounts, and whether to cut the extra stuff of the braid S ₃ inverted, anyway, by performing both inversion and the cutting of the braid S ₃ I have.

[0006]

As described above, the terminal processing of an electric wire requires a very large number of steps. It is an object of the present invention to provide a new and efficient method for processing an end of an electric wire having a large number of steps, particularly for processing the end of the shielded electric wire.

[0007]

In order to achieve the above object,
This invention exposes the braid by peeling the outer skin, and furthermore, from the terminal side of the shielded wire in a state where the tip of the braid is opened, the thickness of the cylindrical inner blade having an outer peripheral edge of the end face as a cutting edge. The part is inserted between the braid and the inner insulator peripheral surface to expand the braid, and in the middle thereof, has an inner diameter slightly larger than the outer diameter of the inner blade, and the inner peripheral edge of the end face is A cylindrical outer blade serving as a cutting blade is arranged coaxially with the inner blade, and the braid is cut in cooperation with the outer blade and the inner blade, and the inner blade is further relatively moved in the same direction. Then, press the remaining exposed braid against the periphery of the outer skin to reverse it, move it further, and after all the remaining exposed braid covers the outer surface of the outer skin, move it in the opposite direction to remove the shielded wire. I tried to extract it.

[0008] With this configuration, the braid is inverted by the inner blade after the cutting, and the means of the separate steps of cutting and reversing are also used, so that the apparatus is simplified and Since the cutting and reversing of the braid can be performed in a series of steps, the production efficiency is improved as compared with the related art.

Further, in the apparatus for carrying out the process, the chips are blocked by the outer blade and the inner blade and do not reach the electric wire side (see FIG. 4 of the embodiment).
A clean product with no chips attached can be obtained.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, as the processing target, as shown in FIG. 1, after the stripped the skin S _4, the braid S
_It is assumed that the shielded electric wire W is in a state where the end of ₃ is open.

FIG. 2 schematically shows an apparatus for this purpose. As shown, the apparatus includes a blade 1 among which performs cutting of the braid S ₃ on the left side of the figure, a holder 2 to support it horizontally, by chucking the blades 1 within which is supported on the holder 2 A drive mechanism 3 for pushing and pulling the same is provided.

The inner blade 1 is a shielded electric wire W to be machined.
Braid S at least half of the outside diameter of _ThreeLarger than the thickness of
Has an inner diameter with a large radius, and the outer peripheral edge 1a at the end thereof
It has a cylindrical shape.

The holder 2 of the inner cutter 1 is a cylindrical body into which the cylindrical inner cutter 1 can be fitted, and is shorter than the entire length of the inner cutter 1. As shown in FIG. The inner blade 1 protrudes from both ends of the cylindrical body in the held state.

The driving mechanism 3 for the inner cutter 1 comprises a chuck 4 for chucking the inner cutter 1, a ball screw 5 on which the chuck 4 is mounted, and a motor M for driving the chuck. When the position of the inner blade 1 is delicately controlled, a stepping motor or the like is used as the motor M.

[0015] On the inner blade 1 or a holder 2 and coaxially, the outer edge 6 for cutting the braid S ₃ in cooperation with the inner blade 1 is arranged. The outer cutter 6 has an inner diameter slightly larger than the outer diameter of the inner cutter 1, and has a cylindrical shape with an inner peripheral edge 6a of the end face serving as a cutting blade.

A chuck 7 for chucking a shielded electric wire W serving as a work is disposed on the right side of the outer cutter 6. The contact surface of the chuck 7 is formed of a hard resin having such a hardness that the outer surface of the electric wire W is not damaged. Although not shown, the peripheral surface of the electric wire W is held in a radial direction by a spring pressure. This is a well-known chuck mechanism. The chuck 7 chucks the shielded electric wire W and the shaft of the electric wire W
(Or the holder 2 and the outer cutter 6) are arranged concentrically with each other.

[0017] Under the above-described apparatus configuration, cutting the inversion of the braid S ₃ of the shielded wire W in this embodiment is carried out as follows.

First, the shielded electric wire W in a state where the tip of the braid S ₃ shown in FIG. 1 is opened is chucked by the chuck 4. Then, as shown in FIG. 3A, the inner blade 1, the outer blade 6, and the shielded electric wire W are arranged on a concentric axis indicated by a two-dot chain line.

When the preparation is completed, the ball screw 5 is driven to move the inner blade 1 toward the electric wire W (toward the outer blade 6), as shown in FIG. 3 (b). When the inner blade 1 advances, on its way, as shown in FIG. 3 (c), will sandwich the braid S ₃ between the outer blade 6, when the inner blade 1 moves further,
As shown in FIG. 4 (a), the outer blade 6 in cooperation with, the braid S ₃ is cut. In the figure, S ₃ ′ is a chip of the braid S ₃ .

Then, the inner blade 1 is further moved in the same direction.
As you move, the remaining exposed braid S _ThreeOn the inner surface of inner blade 1
Therefore, the outer skin S of the shielded wire W_FourPressed against the periphery of
Then, reversal starts at this peripheral portion.

As the inner blade 1 further advances, FIG.
As shown, all of the remaining exposed braid S ₃ is to cover the circumferential surface of the outer skin S ₄ of the wire W, to stop the inner blade 1 upon reaching that state. This stop position is set in advance based on the specifications of the shielded electric wire W and various dimensions of the inner blade 1 and the outer blade 6.

Finally, as shown in FIG.
Is moved in the opposite direction so that the shielded electric wire W is extracted from the inner blade 1.

According to the method of this embodiment, the reversal of the braid S ₃ is also performed by the inner blade 1 after the cutting,
Device while being simplified, inverting the cutting of the braid S ₃ because performed in a series of steps, the production efficiency is improved compared with the conventional.

Further, the swarf S ₃ ′ of the braid is blocked by the inner blade 1 and the outer blade 6 and is shaken down to the outer peripheral surface side of the inner blade 1 and does not remain on the side of the shielded electric wire W. In the finished state, it is possible to obtain a clean product without the attachment of the swarf S ₃ ′ of the braid.

[0025]

As described above, according to the present invention, the outer surface of the braid is exposed by peeling the outer skin, and the outer peripheral edge of the end face is formed with the cutting edge from the end side of the shielded electric wire in a state where the end of the braid is opened. The thickness of the resulting cylindrical inner blade is inserted between the braid and the peripheral surface of the inner insulator to expand the braid, and in the middle thereof has an inner diameter slightly larger than the outer diameter of the inner blade. A cylindrical outer blade having an inner peripheral edge serving as a cutting edge is arranged coaxially with the inner blade, and the outer blade and the inner blade cooperate with each other to cut the braid. Move the blade relatively further in the same direction, press the remaining exposed braid against the periphery of the outer skin and turn it over, move it further, and after moving all the remaining exposed braids to cover the outer peripheral surface of the outer skin, The braid is turned in the direction to remove It is also performed by the inner blade after cutting, and the means of separate steps of cutting and reversing are also used, so that the device is simplified and the cutting and reversing of the braid can be performed in a series of steps, so The production efficiency is improved in comparison.

In the apparatus for performing the above, since the chips are blocked by the outer cutter and the inner cutter and do not reach the electric wire side, a clean product free of the chips is obtained after processing. And eliminates the hassle of cleaning the product.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a form of a work to be processed in this embodiment.

FIG. 2 is a schematic perspective view of an apparatus for performing the method of this embodiment.

FIG. 3A shows a setting state of a work,
(B), (c) in order, the process of cutting and reversing the braid of this embodiment is schematically shown.

FIG. 4 (c) of FIG. 3 in the order of (a), (b) and (c).
Are schematically shown.

FIG. 5 is a perspective view showing a terminal portion of the shielded electric wire.

[Explanation of symbols]

Holder 3 Chuck W of chuck 5 ball screw 6 the outer blade 6a cutting 7 work drive mechanism 4 in the cutter shield wire S ₁ center conductor S ₂ inside insulator 1 inner blade 1a cutting 2 in blade S ₃ braid S ₃ ' Braided chips S ₄ skin

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Teiji Sakuma 1-7-10 Kikuzumi, Minami-ku, Nagoya F Harness Research Institute F-term (reference) 5E051 GA06 GB01 5G355 AA05 BA04 CA07

Claims (2)

[Claims] 1. A method for processing a terminal of a shielded electric wire, wherein a center conductor is covered with an inner insulator, and an outer side thereof is sequentially covered with a conductive braid and an insulating outer cover. From the terminal side of the shielded wire in a state where the end of the braid is opened and the end of the braid is further opened, the thickness of the cylindrical inner blade having an outer peripheral edge of the end surface as a cutting edge is referred to as the braid and the inner insulator peripheral surface. In between, the braid is expanded to expand, and in the middle, a cylindrical outer blade having an inner diameter slightly larger than the outer diameter of the inner blade and an inner peripheral edge of the end face serving as a cutting edge is provided. It is arranged coaxially with the inner blade, cuts the braid by cooperation of the outer blade and the inner blade, and further moves the inner blade relatively in the same direction to remove the remaining exposed braid of the outer skin. Press it around the edge to reverse it, move it further, and After There covered with the peripheral surface of the outer cover, the processing method of the terminal of the shielded wire, characterized in that it has to extract the shielded wire is moved in the opposite direction. 2. An apparatus for performing the processing method according to claim 1, wherein a gripping means for gripping a shielded electric wire in a state in which an end of the braid exposed by peeling the outer skin is opened, and an outer peripheral edge of an end face is formed. In the cylinder which became the cutting blade, the end surface on the side having the cutting blade is disposed coaxially with the shielded wire gripped by the gripping means, facing the braid of the shielded wire, and An inner blade that can move forward and backward along with a cylinder having an inner diameter slightly larger than the outer diameter of the inner blade, an inner peripheral edge of an end surface serving as a cutting edge, and between the inner blade and the shielded wire, An end processing apparatus for a shielded electric wire, comprising: an end face on a side having a cutting edge facing an end face on a side having a cutting edge of the inner cutter, and an outer cutter disposed coaxially with the end face.