JPH01137521A - Manufacture of flat cable - Google Patents

Abstract

PURPOSE:To enable the interwire pitch of a cable to be freely set up so as to obtain the characteristic of a coaxial cable by arranging and laminating insulating films on both outsides of a shield. CONSTITUTION:Insulators 9, which are outer layers of a central conductor 2, and drain wires 3 are arranged at desired intervals by a pitch guide roller 8 and tapes of shields 4 are arranged in the position where insulators 9, which are outer layers of the central conductors 2, and drain wires 3 are nipped from both sides by pitch guide rollers 7. Then a flat cable 1 is manufactured at a time by arranging an insulating film 5 on both outsides of the outer most layers, and passing these components through two laminate rollers 6. Accordingly, an interval A can be freely provided in a space between respective shields 4. Thereby, selection of an interwire pitch P is facilitated, and a pair of the central conductor 2 provided with the insulators 9, which are outside layers separated by the interval A and enclosed by the shields 4, and the drain wires 3 are provided with a characteristic of a coaxial cable so as to obtain an excellent high frequency characteristic.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a flat cable, and more particularly to a method for manufacturing a flat cable in which shields are provided with intervals.

[Prior Art] Shielded flat cables are used for internal wiring of various types of equipment such as computers, communication equipment, and office machines, and for interconnection between equipment.

The flat cable has an insulator 9 as shown in FIG.
It is manufactured by sandwiching two tapes coated with a shield 4 and a plurality of center conductors 2 and drain wires 3 with the insulators 9 of the tapes facing inside (patent application). (Sho 60-198366). This manufacturing method has the advantage that a flat cable can be manufactured by laminating - times. FIG. 5 shows a flat cable manufactured in this manner covered with an insulating film 5.

[Problems with the prior art] When manufacturing a flat cable, the line pitch of the cable is determined based on the pin pitch of the connector, since the connector is determined by the wishes of the user of the equipment that uses the cable. .

In addition, in the flat cable, as shown in FIG. 5, one of the central conductors 2 arranged in parallel is terminal-treated as a drain wire 3 as a method for obtaining a shield ground.
It is grounded.

By the way, it is well known that a coaxial cable as a cable has excellent high frequency characteristics, and in this flat cable, if the center conductor 2 and drain wire 3 are paired and surrounded by a shield, it is possible to have the characteristics of a coaxial cable. Become.

[Purpose of the Invention] The present invention was made based on the above knowledge, and it is possible to freely set the pitch between the wires of the flat cable in manufacturing the flat cable, and to create a coaxial The object of the present invention is to provide a method for manufacturing a flat cable having cable characteristics.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a flat conductor which is provided with a shield surrounding an insulated center conductor and a drain wire, and whose outer layer is protected by an insulating film. In the method for manufacturing a cable, the insulated center conductor and the drain wire are arranged side by side at alternating intervals, and a net shield is provided that can hold a pair of the insulated center conductor and the drain wire at the same time. , the insulated center conductor and the drain wire are placed on both outsides, and the insulating film is placed on both outsides of the shield and laminated, or a shield is placed on the insulating film instead of the shield and the insulating film. A laminated cable is produced by disposing an insulating film on the outer layer, in which the insulating film is adhesively arranged at intervals in advance.

[Embodiment] A preferred embodiment of the present invention will be described with reference to the drawings. A flat cable 1 manufactured according to the invention was surrounded by a shield 4, as shown in FIG. A page between the center conductor 2 and the drain wire 3 with an insulator 9 as an outer layer? The units are arranged side by side with a distance A between the shields 4, and the outside of the shields 4 is protected by an insulating film 5. FIGS. 1(a) and 1(b) are perspective views of the flat cable manufacturing line shown in FIG. 2.

Example 1 As shown in FIG. 1(a), the insulator 9, which is the outer layer of the center conductor 2, and the drain wire 3 are arranged at a desired interval by a pitch guide roll 8, and the tape of the shield 4 is The pitch guide roll 7 places the insulator 9, which is the outer layer of the center conductor 2, and the drain wire 3 in a position where they are sandwiched from both outer sides. Insulating films 5 are placed on both outer sides of the outermost layer, and by passing through two laminating rolls 6, -
The flat cable 1 is manufactured at the same time.

Example 2 The tape of the shield 4 is adhesively arranged in advance on the insulating tape 5 at desired intervals as shown in FIG. 1(c), and this insulating tape with shield is placed as shown in FIG. In addition, it is also possible to manufacture the flat cable 1 at once by placing it on both sides of the insulator 9, which is the outer layer of the center conductor 2, and the drain wire 3, and passing it through the laminating roll 6 as in Example-1. be.

In manufacturing the flat cable of the present invention, the shield 4
Examples of the insulating tape 5 include Cu/PET and AI2/PET, and examples of the insulating tape 5 include PVC, PET/PVC, and PET.
ET/adhesive etc. are preferably used.

[Effects of the Invention] As is clear from the above description, in the method for manufacturing the flat cable 1 of the present invention, the distance A between the shields 4 can be freely set, so the line pitch P can be selected easily. The pair of the center conductor 2 and the drain wire 3 with the outer layer insulator 9 surrounded by the shield 4, separated by the distance A, has the characteristics of a coaxial cable and has excellent high frequency characteristics. It became so.

[Brief explanation of the drawing]

1(a) and 1(b) are perspective views showing the method for manufacturing a flat cable according to the present invention, and FIG. 1(C) shows the relationship between the shield and the insulating film in the method for manufacturing the flat cable according to the present invention. A cross-sectional view showing an application example, Figure 2, is
FIG. 3 is a sectional view of the cable, FIG. 4 is a schematic diagram of a conventional flat cable production line, and FIG. 5 is a perspective view of the cable. 1...Flat cable 2...
.....Center conductor 3 .....Drain wire 4 .....Shield 5 .....Insulating film 6 .....・Laminate roll 7.8 ・・
・・・・・・Pitch guide roll 9 ・・・・・・・・・
...Insulator Figure 1 Figure 1 (C) Figure 2 Figure 3

Claims (1)

[Claims] 1. A method for manufacturing a flat cable comprising a shield surrounding an insulated center conductor and a drain wire, the outer layer of which is protected by an insulating film, wherein the insulated center conductor and drain wire are are arranged in parallel at alternating intervals, and shields having a width that allows a pair of the insulated center conductor and the drain wire to be clamped at the same time are placed on both outsides of the insulated center conductor and the drain wire. A method for manufacturing a flat cable, characterized in that the insulating film is placed and laminated on both outer sides of the shield. 2. The method for manufacturing a flat cable according to claim 1, characterized in that an insulating film is used as an outer layer, on which the shield is adhesively arranged at intervals in advance.