JPS6020155A - Damaged part detecting method of conductive wire insulating covered layer of twin wire - Google Patents

Abstract

PURPOSE:To detect existence of a damage of an insulating covered layer of a split part at the time of a split operation by connecting a splitter and a conductive wire of the initial end part of a twin wire wound to a bobbin of a winding side, to a conduction tester. CONSTITUTION:A twin wire 1 is led to a guide part 11 of a split device 9 by a guide roller 10, and a needle-like splitter 6 passes through a filler 3 of the twin wire 1 by a mechanism of a body part 12 and remains as it is for a prescribed time, therefore, a split part 8 is formed in the filler 3. On the other hand, two conductive wires 2 of the end of the twin wire 1 of a bobbin 5 of the side for winding the twin wire 1 are connected to a terminal 13a of a conduction tester 13, and the splitter 6 is connected to the other terminal 13b of the conduction tester 13 through the body part 12. In this way, if the splitter 6 damages an insulating covered layer of the conductive wire 2 of the twin wire 1 being in the course of a separating operation, the splitter 6 and the conductive wire 2 contact electrically in that part, therefore, the damage of the insulating covered layer can be detected immediately by the conduction tester 13.

Description

Detailed Description of the Invention (al) Technical Field of the Invention The present invention is applicable to twin wire separation (sprint) work, especially since there is a risk of partially damaging the insulating coating layer of the conductive wire with a tool. The present invention relates to a method for detecting whether or not a damaged part is exposed.

(b) Background of the Technology In printed circuit boards in which most of the circuit wiring is formed by printed wiring, so-called individual wiring is often used for supplementary or correction wiring.

The main purpose is to match the impedance of these wirings.
Twin wires are used, which are two conductive wires connected together with a synthetic resin filler. Usually, one conductive wire of the twin wire is used for grounding and the other wire is used for signal.

(C1 Conventional technology and problems An example of the cross section of the twin wire 1 described above is shown in FIG.

The two conductive wires 2 are usually made of extremely thin copper wires, and both are integrally joined with a filler 3 made of synthetic resin such as nylon or vinyl.

It is wound on a bobbin.

When wiring individually, the connection point of the ground wiring and the connection point of the signal wiring are separated by a certain distance.

After cutting the twin wire 1 to a required length, it is necessary to cut the portion of the filler 3 between the two conductive wires 2 to the desired length and separate it as shown in FIG.

In order to efficiently carry out this separation work, the twin wire 1, which has been wound on a bobbin 4 and supplied, is wound onto another bobbin 5, and as shown in FIG. The filler 3 between the conductive wires 2 is twice the separation length, i.e. 2
Tear out only A and set aside. The tools used at this time are shown in Figure 3.

A needle-like splitter 6 with a not-so-sharp tip is used.

As conceptually shown in FIG. 3, while the twin wire 1 being wound around the bobbin 5 and being pulled at a constant speed passes through the guide section 7, the splitter 6 is controlled by a control section (not shown) to a predetermined position. By moving up and down according to the time program, a sprint section 8 of length 2A is created as shown in FIG.
can be formed. In order to use it for individual wiring, this splint portion 8 is cut in half.

In the above-described splinting work, the stubble ivy 6 may damage the layer of the insulating liquid R7 of the conductive wire 2 in the split portion 8, exposing the copper wire inside. Naturally, this will lead to short circuits and poor insulation between the wires during subsequent wiring work, leading to a decrease in product reliability.

Strict inspection is necessary, but it is extremely inefficient to inspect twin wires that have already been cut individually.

There has been a long-awaited method for inspecting twin wire splints that is suitable for efficient mass production.

(dl Purpose of the Invention The present invention has been made in view of the above-mentioned points. As mentioned above, when performing the necessary splinting/)I/work on the twin wire, it is possible to simultaneously detect the presence or absence of damage to the insulating coating layer at the split portion. This is an attempt to provide such a method.

te+ Structure of the Invention The object of the above invention is to use the pulling force applied by the bobbin on the winding side to form an individual wiring that separates the two conductive wires at both ends from the twin wire wound on the bobbin. When the filler of the twin wire passing through a predetermined point regulated by a guide part is penetrated by a splinter to form a predetermined split portion in advance, the twin wire is wound around the splitter and the winding side bobbin. By electrically connecting the conductive wire at the first end of the twin wire to a continuity tester, an electrical short circuit between the splitter and the conductive wire whose insulation coating layer has been destroyed in the splint portion of the twin wire is detected. This is easily accomplished by detecting

(f) Embodiments of the invention Examples of the invention will be described below with reference to the drawings. FIG. 5 is an explanatory diagram illustrating a method of detecting a damaged portion of an insulating coating layer of a conductive wire by a splinter during a twin wire separation operation according to the present invention.

The splinter 9 using the above-mentioned splinter 6 is 9. As shown in the figure, the single-needle splinter 6 guided to the guide portion 11 of the splitter 9 by the guide roller 10 that guides the twin wire 1 is the main body of the splinter 9. Mechanism of section 12 (not shown)
As a result, the twin wire 1 passing through the filler 3 guided by the guide portion 11 directly below the splitter 6 and remaining there for a predetermined period of time, allows the filler 3 to have a length of 2A. 8 is formed.

At this time, attach the two conductive wires 2 at the ends of the twin wire 1 of the bottle 5 to the side on which the twin wire 1 is wound.

The splinter 6 is connected to the terminal 13a of the continuity tester 13, and the splinter 6 is connected to the other terminal 13b of the continuity tester 13 via the main body al+12 of the sprite/gutter device 9.

In such a case, if the splitter 6 breaks the non-color 1-covered VL layer of the 202 conductive wires ('11'') of the twin wire 1 in separation work 4, the splitter 6 and the conductive wire 6 Since it is in electrical contact with the wire 2, damage to the insulating coating layer of the conductive wire 2 is immediately detected by the continuity tester 13G. clearly displayed.

(gl) Effects of the Invention As is clear from the above explanation, if the method of the present invention is used to detect damaged parts of the conductive wire insulation coating layer caused by splints and ivy during twin wire separation work, emergency Detection work can be performed with high efficiency, and the inspection cost can be reduced by t'4+1 to approximately 1M.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a twin wire, and FIG. 2 is a plan view showing a twin wire with both ends split for individual wiring. FIG. 3 is a conceptual diagram showing a method of continuously performing twin wire splint work, FIG. 4 is a plan view of continuously split twin wires, and FIG. 1 is a configuration diagram showing an example of a method for detecting damage to an insulating coating layer of a conductive wire in parts 1 to 1; FIG. In the figure, ■ is a twin wire, 2 is a conductive wire, 3 is a filler, 4 and 5 are bobbins, 6 is a splitter, and 7 is a splitter. Reference numeral 11 indicates a guide portion, 8 a splint portion, 9 a splitter, and 13 a continuity tester.

Claims (1)

[Claims] The two conductive wires at both ends of the twin wire wound on the bobbin pass through a predetermined point regulated by the guide part by the tensile force given by the bobbin on the first winding side to form individual wiring separated from each other. When forming a predetermined splint part in advance by passing the filler of the twin wire inside N through a splitter, conduct a continuity test between the splinter and the conductive wire at the initial end of the twin wire wound on the winding side bobbin. The twin wire is characterized in that an electrical short circuit between the splitter and the conductive wire in which the insulating wave Fit layer in the splint portion of the twin wire is broken is detected by electrically connecting the twin wire to a device. A method for detecting damaged parts of conductive wire insulation coating layers.