JPH0562527A - Flat wiring cable - Google Patents

Abstract

PURPOSE:To provide a flat wiring cable easily applicable in practical field allowing process of bent laying at the site easily with a practical radius of bending. CONSTITUTION:A strip-form male fit part 4 and a strip-form female fit part 5 are formed on a left and a right external sides in a single body continuously in the longitudinal direction (constituting a unit cable 1a) in such an arrangement that, when two unit cables 1a, 1a are laid in line, the male/female fit part 4, 5 of one unit cable 1a can be detained with the female/male fit part 5, 4 of the other unitary cable 1a with capability of being separated as desired. When laying is made laterally, the cables are disengaged at the bend, and they are slided relative to each other and bent while a gap 6 is reserved between them adjoining.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring cable for telephones in offices or the like, or a wiring cable used for connecting computer-applied devices to each other, and more particularly to a flat wiring cable used for undercarpets. is there.

[0002]

2. Description of the Related Art In recent years,
With higher performance and lower price of personal computers,
Personal computer application equipment tends to permeate into offices, research laboratories, factories, and other businesses. Conventionally, this type of device is designed on the assumption that it is used independently of each other. Therefore, its capacity is limited by the amount of data held by each device.
A (local area network) system, that is, a system in which the devices are connected to each other tends to effectively utilize the data held by the devices.

As one of the methods of laying a cable used for connection for such a purpose, a cable having a flat cross section is manufactured and laid under a carpet in an office or the like.

At the time of laying, it becomes necessary to bend the flat wiring cable in a predetermined direction as appropriate, but the following method has been conventionally used.

(A) As shown in FIG. 6, the flat wiring cable 1 is turned upside down, and is superposed and bent.

(B) As shown in FIG. 7, the flat wiring cable 1 is gently bent with a large bending radius at the bent portion.

The method (a) has a drawback that it becomes difficult to invert when the thickness of the cable is about 2 mm or more, and the thickness is doubled when the cable is inverted.

Further, when the signal transmission strip in the cable 1 is an optical fiber cable, the optical fiber is broken, so this method cannot be used.

In the method (b), when the number of signal transmission strips in the cable 1 is increased, the width of the cable 1 is inevitably widened and the bending radius becomes extremely large, which is not practical.

A method for solving this problem is actually fair 2072
No. 6, Jikken 2-34731, but neither method is sufficient.

That is, the former method (actual fair 2-20736)
No.) is cut into the wiring cable 1 as shown in FIG.
Is provided, and the fixed piece 11 is inserted into the notch 10 to form a bent portion.

However, in this method, the bending radius of the inner portion B is smaller than the bending radius of the outer portion A. Therefore, if an attempt is made to reduce the bending radius of the outer portion A, the inner portion B needs a smaller bending radius, and as a result, the outer portion A does not have a sufficiently small bending radius, which is not practical.

In addition, the latter method (actual fair 2-34731)
9), as shown in FIG. 9, a connecting portion 12 is provided at the center of the cable 1, and the bent portion of the connecting portion 12 is removed to form a slit.
Form 13.

The slit 13 is intended to absorb the strain due to the difference in bending radius between the outer portion A and the inner portion B of the cable 1.

However, in practice, this connecting portion 12 (slit
By providing 13), the width of the cable 1 is further increased, and the distortion due to the difference in bending radius between the outer portion A and the inner portion B becomes large and cannot be absorbed, resulting in the slit.
The effect of setting 13 disappears.

It is a technical object of the present invention to solve the above problems and to provide a flat wiring cable having excellent practicality, which can be bent and laid easily with a practical bending radius.

[0017]

The gist of the present invention will be described with reference to the accompanying drawings.

In a wiring cable in which the signal transmission strips 2 or a plurality of signal transmission strips 2 are arranged side by side and the coating layer 3 is formed on the outer periphery of the resin to have a flat cross section, the left and right outer surfaces of the coating layer 3 are formed. A male fitting strip portion 4 and a female fitting strip portion 5 that fit one into the other are formed in the longitudinal direction (this is referred to as a unit cable 1a), and two wiring cables (unit cables) 1a and 1a are arranged side by side. One unit cable 1 when installed
The male fitting strip portion 4 or the female fitting strip portion 5 of a is configured such that the female fitting strip portion 5 or the male fitting strip portion 4 of the other unit cable 1a can be engaged and disengaged. It relates to a flat wiring cable.

[0019]

A plurality of unit cables 1a are arranged side by side, and the male fitting ridge portion 4 or the female fitting ridge portion 5 which is exposed on the outer surface of one of the adjacent unit cables 1a on the side of the coating layer 3 is opposed to this ( The female fitting strips 5 or the male fitting strips 4 of the other unit cable 1a (adjacent to each other) are fitted to each other to form a plurality of integrated cables.

When the cable is laid in the lateral direction, the unit cables 1a are uncoupled from each other at the bent portion, a gap 6 is provided between the adjacent unit cables 1a, and the unit cables 1a are appropriately slid together and folded. To sing.

In other words, although the cable is wide as a whole, it can be bent and laid with the bending radius of the unit cable 1a alone.

Incidentally, the male fitting strip portion 4, which is unnecessary in the bending portion,
If the female fitting strip portion 5 is cut off, it can be laid with a smaller bending radius.

[0023]

EXAMPLE In this example, as shown in FIG. 1, one wiring cable 1a formed by coating a signal transmission strip 2 with a resin so as to have a flat cross section was fitted to one side by a male fitting on the side surface of the coating layer 3a. The ridge portion 4 is continuously and integrally formed in the longitudinal direction, and the female fitting ridge portion 5 which is shaped to fit with the male fitting ridge portion 4 is also integrally and continuously formed in the longitudinal direction on the opposite side surface. The wiring cable 1a is set as one unit, and the width of the unit cable 1a is designed to be sufficiently small so that the unit cable 1a can be bent and laid easily.

A required number of the unit cables 1a are arranged in parallel with the male fitting strips 4 and the female fitting strips 5 facing each other, and as shown in FIG. 2, the male fitting strips of the adjacent unit cables 1a and 1a are arranged. 4 and the female fitting ridge portion 5 are laid as one body while being fitted to each other.

As shown in FIG. 3, at the bending and laying place, the fitting ridges 4 and 5 are not fitted but separated from each other, a gap 6 is provided, and the fitted portion is slid appropriately.

FIG. 5 shows a wiring cable 1 created for comparison. This wiring cable 1 has a 0.65 mm diameter bare annealed copper wire coated with foamed polyethylene, two insulated wires with an outer diameter of 1.8 mm are arranged in parallel, wrapped with aluminum / polyester laminate tape, and shielded for signal transmission. Form 2.

The outer circumference of the signal transmission strip 2 is made of soft PVC.
The coating layer 3 is formed so as to have a sectional shape (thickness 2.6 mm, width 16 mm).

When an attempt was made to bend and lay this cable 1, the minimum bending radius was 2 m.

On the other hand, FIG. 1 shows the above-described embodiment of the present invention, and the signal transmission strip 2 used is the one shown in FIG.
It has the same structure as the wiring cable 1 for comparison shown in FIG.

A coating layer 3 was formed from soft PVC so that the signal transmission strip 2 had the illustrated cross-sectional shape (thickness 2.6 mm, width 8 mm), and this was used as a unit cable 1a. That is, it is half the width of the wiring cable 1 for comparison.

The unit cable 1a can be bent and laid with a bending radius of 10 cm.

When the two unit cables 1a are fitted together by the adjacent fitting strips 4 and 5 as described above, the overall configuration (width) of the cable 1 is almost the same as that of the comparative wiring cable 1. Despite this, the bending radius could be reduced from 2m to 10cm. Note that FIG. 3 illustrates a case where the three unit cables 1a are fitted and bent in this way, and FIG. 4 is another example.

Other than the present embodiment, the following can be considered as the signal transmission strip 2.

(A) Insulated wire in which a conductor is coated with insulation (b) Two insulated wires twisted together (c) Two insulated wires twisted together and shielded (d) Coaxial cable (e) ) Optical fiber cable The wiring cable 1 may be a combination of different types of unit cables 1a, or the unit cable 1a may be formed by a combination of these different types of signal transmission strips 2.

Further, the fitting-shaped portions 4 and 5 need only have the same shape for each unit cable 1a, and the shape can be designed appropriately.

[0036]

Since the present invention is configured as described above, it can be easily bent and laid with a practical bending radius, and the unit cables can be easily branched and joined, so that the layout can be flexibly dealt with. Flat wiring cable with excellent performance,
In particular, a cable for undercarpet can be provided.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a unit cable of this embodiment.

FIG. 2 is a cross-sectional view of a unit cable of the present invention in a fitted state, that is, a wiring cable.

FIG. 3 is a plan view of a bent portion of a three-piece integrated wiring cable showing a bending and laying method of the present embodiment.

FIG. 4 is a cross-sectional view of a unit cable of another example of this embodiment.

FIG. 5 is a cross-sectional view of a wiring cable for comparison with this embodiment.

FIG. 6 is an example of a conventional unsuitable bending installation.

FIG. 7 is another example of a conventional unsuitable bending installation.

FIG. 8 is an example of bending and laying according to Japanese Utility Model Publication No. 2-20736.

FIG. 9 is an example of bending and laying according to Japanese Utility Model Publication No. 2-34731.

[Explanation of symbols]

 1a Wiring cable (unit cable) 2 Signal transmission strip 3 Cover layer 4 Male fitting strip 5 Female fitting strip

[Procedure amendment]

[Submission date] November 24, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0019

[Correction method] Change

[Correction content]

[0019]

A plurality of unit cables 1a are arranged side by side, and the male fitting strips 4 or the female fitting strips 5 provided on the outer surface of one of the adjacent unit cables 1a on the side of the coating layer 3 are opposed to the male fitting strips 4 or 5 (adjacent to each other). (Fit) The female fitting ridge 5 or the male fitting ridge 4 of the other unit cable 1a is fitted to form a plurality of integrated cables, which are laid.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction content]

When bending and laying in the lateral direction, the unit cables 1a are uncoupled from each other at the bent portion, a gap 6 is provided between the adjacent unit cables 1a, and the unit cables 1a are appropriately slid together and folded. To sing.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0027

[Correction method] Change

[Correction content]

Two signal transmission strips 2 are arranged in parallel,
The outer circumference is made of soft PVC with a cross-sectional shape (thickness 2.6 mm, width 16 m
The coating layer 3 is formed so as to be m).

Claims (1)

[Claims] 1. A wiring cable in which a signal transmission strip or a plurality of signal transmission strips are arranged side by side and a coating layer is formed on the outer periphery of the resin to have a flat cross-section, and one of the left and right outer surfaces of the coating layer is formed. When a male fitting strip and a female fitting strip to be fitted to the other are integrally formed in the longitudinal direction and two wiring cables are arranged side by side, the male fitting strip or female fitting of one wiring cable A wiring cable characterized in that a female fitting strip portion or a male fitting strip portion of the other wiring cable is configured to be detachable from the strip portion.