JPH08273450A - Light/power composite cable and manufacture thereof - Google Patents

Abstract

PURPOSE: To provide a light/electric composite cable capable of simply forming storage grooves storing signal line and capable of simply storing the signal lines. CONSTITUTION: Two twistable power strands 22 each having a semicircular cross section and formed with a linear storage groove 28 along the end edge section of a arc-like peripheral face 22a are superposed on each other to form a power line 23 having a circular cross section. Signal lines 25 are stored in the storage grooves 28, then the power strands 22 are twisted, and the spiral storage grooves 28 are formed. Two flexible power strands 22 are linearly assembled then twisted to form the power line 23. The storage grooves 28 are linearly formed, then the signal lines 25 can be stored, thus the storage grooves 28 are easily formed, and the signal lines 25 are easily stored.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention relates to control of robots,
The present invention relates to an optical / electric power composite cable used for signal transmission of a LAN and having a power line and an optical fiber housed in the same cable.

[0002]

2. Description of the Related Art As a conventional optical / electric power composite cable,
For example, the technique described in JP-A-2-201818 can be mentioned. As shown in FIG. 6 and FIG. 7, this optical / electrical power composite cable has a spiral shape 4 along the longitudinal direction on the outer peripheral surface of the spacer 11 having the power line 10a at the center.
It is configured by forming book containing grooves 12, accommodating signal lines 14 such as optical fibers and electric wires in the containing grooves 12, and covering the outer peripheral side thereof with an insulating member 13 via an outer power line 10b. It Here, the housing groove 12 is formed in a spiral shape in order to improve flexibility of the optical / power composite cable.

[0003]

However, since the spacer 11 is formed of a single member, it is not possible to twist the spacer 11 after forming the linear accommodation groove 12 along the spacer 11. It is impossible. Therefore, a special groove forming device having a special structure is required to form the spiral accommodation groove 12 on the outer peripheral surface of the spacer 11.
Further, since the accommodation groove 12 is formed in a spiral shape, it is difficult to accommodate the signal line 14, which is also a problem.

Therefore, the present invention has been made to solve the above-mentioned problems, and it is possible to easily form the accommodation groove and to easily accommodate the signal line. It is to provide an electric power composite cable.

[0005]

In order to solve the above-mentioned problems, the optical / power composite cable according to claim 1 has a spiral accommodating groove formed on the outer periphery of the power line and accommodating the signal line in the accommodating groove. Then, in the optical / power composite cable whose outer periphery is covered with an insulating member, the power line is configured by stacking a plurality of twistable power wires, and each power wire is a conductor, An insulator covering this conductor,
A housing groove formed on the outer periphery of the insulator and extending linearly along the longitudinal direction, and the housing groove is spirally arranged by stacking and twisting a plurality of these electric power wires. Is characterized by.

Further, as described in claim 2, the electric power wire may be finished in a semicircular shape or a fan shape in its cross section, and the accommodating groove may be formed on the arcuate peripheral surface thereof.

According to a third aspect of the present invention, each of the electric power wires has a locking projection formed on one of the joining surfaces and a locking projection capable of engaging the other with the locking projection. You may make it form a recessed line and overlap each electric power wire in the state which engaged the said locking convex line with the said locking recessed line.

Further, as described in claim 4, a ridge portion for protecting the signal line may be formed at the opening edge of the inner side surface of the accommodation groove.

According to a fifth aspect of the present invention, there is provided a method for manufacturing an optical / electrical power composite cable in which an outer periphery of a conductor is covered with an insulator by extrusion molding to form a groove for accommodating a signal line in a longitudinal direction thereof. After forming a twistable electric power wire having a semicircular cross section or a fan shape having a curved arc-shaped peripheral surface and a joint surface, the electric power wires are brought into close contact with each other by the contact surfaces of the electric power wires. While gathering in a straight line,
After accommodating the signal wire in the accommodating groove, each of the assembled power element wires is spirally twisted and the outer periphery thereof is covered with an insulating member.

[0010]

According to the optical / electrical power composite cable of claim 1 configured as described above, since the power line is formed by stacking a plurality of twistable power element wires, the power line is twisted. Is easy, and since each electric power wire is formed with a linear accommodating groove in its longitudinal direction,
It becomes easy to form the accommodation groove.

Further, as in the optical / electrical power composite cable according to the second aspect of the present invention, each power wire is finished in a semicircular or fan-shaped cross section, and a housing groove is formed on its arcuate peripheral surface. Then, the cross section of the power line is finished in a substantially circular shape.

According to a third aspect of the present invention, each of the power wires has a locking projection formed on one of the joining surfaces and a locking projection capable of engaging the other with the locking projection. If a power strip is formed by forming a groove and the locking projections are engaged with the locking groove, the power wires can be stacked at a fixed position. , It is possible to prevent them from being displaced or coming off after being superposed.

Further, as described in claim 4, if the projecting shape for protecting the signal line is formed at the opening edge of the inner side surface of the accommodation groove, it is possible to prevent the signal line from being damaged from the outside.

Further, as described in claim 5, by covering the outer periphery of the conductor by extrusion molding, the conductor is joined to the arcuate peripheral surface in which the accommodating groove for accommodating the signal line is formed along the longitudinal direction thereof. After forming a twistable electric power wire having a semicircular cross section or a fan shape having a surface, the electric power wires are gathered in a linear shape by bringing the joint surfaces of the electric power wires into close contact with each other. After accommodating the signal wire in the accommodating groove, if the gathered power wires are spirally twisted and the outer periphery thereof is covered with an insulating member, the accommodating groove can be easily formed in a straight line in each power element. Furthermore, the signal lines can be housed after the electric power wires are assembled into a linear shape, that is, in the accommodating groove in a linear state, and the signal line housing work is facilitated.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment according to the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, this optical / power composite cable is a twistable electric power element in which an outer periphery of a conductor 20 made of annealed copper is covered with an insulator 21 of polyvinyl chloride by extrusion molding. The wires 22 are twisted together to form a power line 23, a signal line 25 such as an optical fiber or an electric wire is arranged along the longitudinal direction of the power line 23, and an insulating layer 26 formed by winding a tape 26a around the outer periphery thereof and the outside. And an insulating layer 27.

Each of the electric power wires 22 has a semicircular cross section having an arcuate peripheral surface 22a and a joint surface 22b, and at the time of extrusion molding, the end edge portion of the arcuate peripheral surface 22a (the joint surface 22b).
A linear accommodating groove 28 for accommodating the signal line 25 is formed along the boundary (between and). Then, when the joining surfaces 22b are brought into close contact with each other and the electric power wires 22 are linearly gathered, the electric power line 23 in which the accommodating groove 28 is linearly formed on the outer periphery thereof is formed. The signal line 2 is inserted into the linear accommodation groove 28.
5 is accommodated, and then the power line 23 is twisted to form the electric wire group 23 in which the signal line 25 is accommodated in the spiral accommodation groove 28. Then, the tape 26a is wound around this outer periphery, and then the outer insulating layer 27 is covered.

As described above, according to the optical / power composite cable of this embodiment, since the two twistable power lines 22 are assembled to form the power line 23, the accommodating groove 28 is linear. As described above, the power wires 22 are overlapped with each other, the signal wires 25 are housed in the linear housing grooves 28, and then the power wires 22 are twisted to manufacture a cable. Therefore, the accommodation groove 28 can be formed linearly in the power element wire 22, and the accommodation groove 28 can be easily formed. In particular, it is effective when the accommodation groove 28 is formed simultaneously with the extrusion molding of the power wire 28. Further, since the signal line 25 can be housed in the linear housing groove 28, the signal line 28
Can be easily accommodated.

When manufacturing the above-mentioned optical / electric power composite cable, each power element wire 22 is extruded and formed immediately after being extruded so that the power element wires 22 can be easily twisted together.
It is preferable that the power wires 22 are twisted by accommodating the two wires and further housing the signal wire 25 in the housing groove 28.

Further, in the first embodiment described above, as shown in FIG. 1, the cross-sectional shape of the bottom of the receiving groove 28 is semicircular, but as shown in FIG. The cross-sectional shape may be a quarter circle, or the bottom may have a rectangular cross-sectional shape as shown in FIG. 3 (b), or a triangular shape as shown in FIG. 3 (c). You may

Further, as in the embodiment shown in FIG. 4, the engaging projections 30 are formed on the joint surface 22b of the power element wire 22 on one side, while the engaging protrusions 30 are formed on the joint surface 22b of the power element wire 22 on the other side. Each of the electric power wires 2 is formed by forming a locking concave line 31 for locking the stop convex line 30 and by locking the locking convex line 30 and the locking concave line 31.
If 0s are joined together, each power element wire 20 can be joined at a constant position at all times, and even after joining,
It is possible to prevent them from shifting or falling apart.

Further, as in the embodiment shown in FIG. 5, a ridge 32 projecting inward of the accommodation groove 28 is formed along the opening edge of one inner surface of each accommodation groove 28, The ridge portion 32 may protect the signal line 25 from external damage, and may prevent the signal line 25 from falling off the accommodation groove 28.

In each of the above-described embodiments, two power element wires 22 having a semicircular cross section are twisted together, but a plurality of twistable power element wires having a cross section fan shape are twisted together to form a power line 2.
The cross section of 3 may be circular.

Although the accommodation groove 28 is formed along the edge of the arc-shaped peripheral surface 22a, it may be formed anywhere if it is linearly formed on the arc-shaped peripheral surface 22a. The accommodation groove 28 may be formed to accommodate a large number of signal lines 25.

[0025]

As described above, according to the combined optical and power cable of claim 1 of the present invention, since the power line is formed by stacking a plurality of twistable power element wires, the power line is Twisting is facilitated, and since each electric power wire is formed with a linear accommodation groove in its longitudinal direction, the accommodation groove can be easily formed.

Further, as described in claim 2, when each electric power wire is finished in a semicircular or fan-shaped cross section and an accommodating groove is formed on its arcuate peripheral surface, the electric power line is traversed. The surface is finished in a substantially circular shape to improve the appearance and the like.

According to a third aspect of the present invention, each of the electric power wires is formed with a locking projection on one of the joint surfaces and a locking capable of engaging the other with the locking projection. If a power strip is formed by forming a groove and the locking projections are engaged with the locking groove, the power wires can be stacked at a fixed position. , It is possible to prevent them from being misaligned or coming off after being superposed.

Further, as described in claim 4, if the projecting shape for protecting the signal line is formed at the opening edge of the inner side surface of the accommodation groove, it is possible to prevent the signal line from being damaged from the outside.

Further, as in the method for manufacturing an optical / electrical power composite cable according to claim 5, a cross section having an arcuate peripheral surface on which a housing groove for housing a signal line is formed and a joint surface is formed along a longitudinal direction thereof. After forming a semi-circular or fan-shaped twistable power element wire, collect each power element wire, house the signal wire in the linear groove, and then use the assembled power element wire. With this configuration, the linear accommodation groove can be easily formed, and the signal line can be easily accommodated in the linear accommodation groove, so that the productivity of the optical / power composite cable is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an optical / power composite cable of a first embodiment according to the present invention.

FIG. 2 is a cross-sectional view showing the optical / power composite cable of the above.

FIG. 3 is a sectional view showing an optical / power composite cable of a second embodiment according to the present invention.

FIG. 4 is a sectional view showing an optical / power composite cable according to a third embodiment of the present invention.

FIG. 5 is a cross-sectional view showing an optical / power composite cable of a fourth embodiment according to the present invention.

FIG. 6 is a perspective view showing a conventional optical / power composite cable.

FIG. 7 is a cross-sectional view showing the optical / power composite cable of the above.

[Explanation of symbols]

 20 conductor 21 insulator 22 power element wire 22a arcuate peripheral surface 22b joining surface 23 power line 25 signal line 28 accommodating groove 30 locking convex ridge 31 locking concave ridge 32 ridge

Claims (5)

[Claims] 1. An optical / power composite cable in which a spiral accommodation groove is formed on the outer periphery of a power line, a signal line is accommodated in the accommodation groove, and the outer periphery is covered with an insulating member. It is configured by stacking the twistable power wires of
It has an insulator covering the conductor and an accommodating groove formed on the outer periphery of the insulator and extending linearly in the longitudinal direction. The accommodating groove is formed by stacking and twisting a plurality of these power wires. Optical / power composite cable characterized by arranging in a spiral shape. 2. The light wire according to claim 1, wherein the electric power wire is finished in a semicircular shape or a fan shape in cross section, and the accommodating groove is formed on an arcuate peripheral surface thereof.
Power composite cable. 3. Each of the electric power wires has a locking projection formed on one of the joining surfaces thereof, and a locking groove that can be engaged with the locking projection is formed on the other surface. 3. The optical / electrical power composite cable according to claim 1, wherein the electric power wires are overlapped with each other with the locking ridge engaged with the locking recess. 4. The optical / power composite cable according to claim 1, wherein a protrusion is formed on an opening edge of an inner side surface of the accommodation groove to protect the signal line. 5. A semicircular cross-section having an arcuate peripheral surface having a housing groove for housing a signal line and a joint surface along the longitudinal direction of the conductor by covering the outer circumference of the conductor by extrusion molding. After forming the shape or fan-shaped twistable power wire, the power wires are brought together in a straight line by bringing the joint surfaces of the power wires into close contact with each other, and the signal wire is placed in the accommodation groove. After accommodating the above, the assembled power wires are spirally twisted and the outer circumference thereof is covered with an insulating member.