JPH02242535A - Flat cable manufacturing apparatus - Google Patents

Abstract

PURPOSE:To make it possible to form slits surely in prescribed positions between conductors even in highly dense flat cable by installing a slit forming blade in press-molding rolls. CONSTITUTION:A slit forming blade 10 with a prescribed length is projected along with parts of the outer circumferences of one of press-molding rolls 6A and a groove into which the slit forming blade 10 gets is formed in the other press-molding roll 6B. With an apparatus like this, while heating and press- molding are carried out, slits 3 are formed by the slit forming blade 10. Like this way, press-molding and slit forming process are carried out in the same position, and even in slit forming for a highly dense flat cable, it can be carried out in a correct position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a flat cable manufacturing device.

"Prior Art" As shown in FIGS. 5 and 6, conductors 1 arranged in parallel at a predetermined pitch are connected to a pair of insulating tapes 2A made of thermoplastic resin.
, 2B, and these insulating tapes 2A, 2B are fused together, and the insulating tapes 2A, 2B between the conductors 1 have a structure in which slits 3 are intermittently made at intervals in the longitudinal direction. A flat cable 4 has been proposed.

Such a flat cable 4 has good flexibility due to the presence of the slit 3.

Conventionally, manufacturing of such a flat cable 4 involves, as shown in FIG. 7, each conductor 1 supplied at a predetermined pitch as described above, and insulating tape 2A supplied from upper and lower tape supplies 5A and 5B, respectively. , 2B and a pair of pressure forming rolls 6A.

6B, heat and pressurize it to form both insulation tapes 2A,
2B are fused together to obtain a flat cable 4, the flat cable 4 is passed through the ear clipping part 7, the unnecessary ears at both ends of the flat cable 40 in the width direction are cut off, and then the flat cable 4 is passed through the slit part 8. The adjacent conductor 1 of the flat cable 4
This was done by making slits 3 intermittently in the longitudinal direction in the insulating tapes 2A and 2B between them, and then passing them between capstan rolls 9A and 9B and taking them off.

Recently, such a flat cable 4 has been made denser by narrowing the pitch between the conductors 1. When it comes to high-density flat cables 4, the pitch between conductors 1 is minimized,
In some cases, the pitch between the conductors 1 in which the slits 3 are inserted is about 0.3 mm.

[Problem to be solved by the invention] However, such a high-density flat cable 4
In manufacturing, the slit forming blade of the slit section 8 was required to operate with high precision, and the flat cable 4 side was also not allowed to run in a meandering manner, making the work extremely difficult. If the slit forming blade and the conductor 1 should come into contact with each other, there is a risk that a wire breakage will occur.

An object of the present invention is to provide a flat cable manufacturing device that can easily form slits even when the cable is highly densified.

[Means for Solving the Problems] To explain in detail the present invention for achieving the above object, the present invention involves sandwiching conductors arranged in parallel at a predetermined pitch between a pair of insulating tapes, and A flat cable is obtained by passing the tape between the pressure forming rolls and heating and pressure forming the tapes to fuse them to each other. In a flat cable manufacturing apparatus in which a slit is made in the insulating tape between the pair of pressure forming rolls, a slit forming blade is provided on the outer periphery of one of the pressure forming rolls, and a slit forming blade is partially formed on the outer periphery of one of the pressure forming rolls in a predetermined length in the circumferential direction. It is characterized by being protruded.

[Function] When the pressure forming roll is provided with a slit forming blade in this manner, slits can be reliably formed at predetermined positions between conductors even in a high-density flat cable.

Additionally, the structure of the device becomes simpler.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings. Note that parts corresponding to those in FIGS. 5 to 7 described above are designated by the same reference numerals.

In the flat cable manufacturing apparatus of this embodiment, a slit forming blade 10 is partially protruded at a predetermined length in the circumferential direction from the outer periphery of one pressure forming roll 6A. The slit forming blade 10 may be formed integrally by cutting out from the forming roll 6A, or may be formed by incorporating another blade. Note that β2 is the circumferential length of the portion where the slit forming blade 10 is not provided. Slit forming blade 1
0, the other pressure forming roll 6B is provided with a groove 1 with which the slit forming blade 10 engages. Since the slit forming blade 10 is provided on the pressure forming roll 6A in this manner, the slit portion 8 that was conventionally provided after the selvedge portion 7 is omitted. The other configurations are the same as those shown in FIGS. 5 to 7 described above.

In such an apparatus, the slit 3 is formed by the slit forming blade 10 while heating and pressure shaping are performed by the pressure forming rolls 6A and 6B. Therefore, since the pressure molding step and the slitting step are performed at the same location, even the slitting of the high-density flat cable 4 can be easily performed at the correct location.

Note that the other pressure forming roll 6B may also be provided with a slit forming blade corresponding to the slit forming blade 10 of one pressure forming roll 6A. Alternatively, the slit forming blade 10 of one pressure forming roll 6A may be omitted, and the slit forming blade may be provided only on the other pressure forming roll 6B.

Furthermore, if a ring-shaped selvage blade is provided continuously in the circumferential direction on one or both of the pressure forming rolls 6A, 6B at the end in the width direction, the selvage portion 7 at the next stage can be omitted. I can do it.

[Effects of the Invention] As explained above, in the flat cable manufacturing apparatus according to the present invention, the pressure forming roll is provided with a slit forming blade, so even in a high-density flat cable, slits can be reliably formed at predetermined positions between conductors. can be formed. Also,
The structure of the device is also simplified and costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of the pressure forming roll used in the present invention, FIG. 2 is an enlarged vertical cross-sectional view of the contact portion of the pressure forming roll shown in FIG. ) are side and front views of the pressure forming roll used in this example, Figure 4 is a side view showing the schematic configuration of the device of this example, and Figures 5 and 6 are cross sections of the flat cable. Figures and Plans, No. 7
The figure is a side view showing a schematic configuration of a conventional device. 1... Conductor, 2A, 2B... Insulating tape, 3...
Slit, 4...Flat cable, 5A, 5B...
・Tep supply, 6A, 6B...pressure forming roll, 7
...Eared part, 8...Slit part, 10...Slit forming blade, 11...Groove.

Claims (1)

[Claims] Conductors arranged in parallel at a predetermined pitch are sandwiched between a pair of insulating tapes, and then passed between a pair of pressure forming rolls to heat and heat them.
A flat cable is obtained by pressure-molding and fusing both of the insulating tapes to each other, and slits are intermittently formed in the insulating tape between the conductors at intervals in the longitudinal direction of the flat cable. In the flat cable manufacturing apparatus, a slit forming blade is partially protruded by a predetermined length in the circumferential direction from the outer periphery of at least one of the pair of pressure forming rolls. Manufacturing equipment.