JPH08315643A - Cabtire cable for movement - Google Patents

Abstract

PURPOSE: To provide a cabtire cable capable of manufacturing without necessity of selection of a material easy to bond and an adhesive, an additional heating, pressing process, in order to unite each constituting member, and fastening with a tape or a knitting yarn in order to form an adhesive layer. CONSTITUTION: An insulator is covered on a conductor 11 to form a cable insulating layer 12, and a sheath 14 is formed on the cable insulating layer 12. The conductor 11 is formed by alternately arranging large and small sub- twists of adjacent sub-twists 11A, 11B, and the cable insulating layer 12 has the specified number of recessed longitudinal grooves 12A formed in the lengthy direction of the outer circumference, circumferential recessed lateral grooves 12B formed at specified intervals in the lengthy direction of the outer circumference, and the sheath 14 surrounds the recessed longitudinal grooves 12A and the recessed lateral grooves 12B of the cable insulating layer 12 so as to wrap them.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving cabtire cable for power supply for controlling and controlling a crane, various machines and the like.

[0002]

2. Description of the Related Art FIG. 5 shows an example of a conventional moving cabtyre cable for power supply for controlling and supplying power to a crane and various machines. The moving cabtire cable 50 of FIG.
Is coated with, for example, an EP rubber (abbreviation of ethylene propylene rubber) insulator on the conductor 11 and is collectively covered with, for example, a chloroprene rubber sheath 14 on the outer circumference of an insulated wire core 13 provided with a cable insulating layer 12. It is a thing. The cabtyre cable for transportation as described above is used while being constantly subjected to repeated bending and ironing with a cable reel or a cable bear. When the cabtire cable is subjected to repeated bending and ironing, the rubber, which is the coating material for the cabtire cable, loses its resistance to deviation due to bending and ironing, and eventually buckles and becomes unusable.

As described above, as a measure to withstand long-term use under mechanical use conditions such as repeated bending and ironing, a cable insulating layer made of a constituent member of a cabtire cable, for example, a conductor or an insulator. A cabtyre cable for movement 60 shown in FIG. 6 in which a sheath and a sheath are integrated has been proposed.

This moving cabtire cable 60 is
On the conductor 11, an adhesive layer 6 made of, for example, a rubber adhesive
2 is provided, the outer periphery thereof is covered with a cable insulating layer 12 made of, for example, an EP rubber insulator, and the insulating wire core 63 is further provided with an adhesive layer 64 made of, for example, a rubber adhesive. For example, the outer periphery is provided with a chloroprene rubber sheath 14. Thus, the adhesive layer 6
2 and the adhesive layer 64 integrate the components of the cabtire cable to reinforce the resistance of the components to bending and ironing.

[0005]

The moving cabtire cable 60 is designed to withstand long-term use by integrating the constituent members. However, in order to integrate the constituent members, There is a drawback in that it becomes costly because it requires selection of materials and adhesives that are easy to bond, addition of a heating and pressurizing step, and tightening with a tape or knitting yarn.

The present invention solves the above problems and provides a cabtyre cable that can achieve integration with a simple structure without using an adhesive layer and can secure strength against repeated bending and ironing. It is intended.

[0007]

The present invention has the following means in order to solve the above problems. The moving cabtire cable of the present invention is a moving cabtire cable in which a conductor is provided with a cable insulating layer by coating an insulator on the conductor, and a sheath is provided on the cable insulating layer.
The conductors are arranged such that adjacent strands are alternately arranged with large and small strands, and the cable insulating layer is formed with a predetermined number of concave vertical grooves in the outer peripheral longitudinal direction, and at a predetermined interval in the outer peripheral longitudinal direction. Directional concave groove is formed, and the sheath surrounds the cable insulating layer so as to enclose the concave longitudinal groove and the concave lateral groove.

[0008]

According to the cabtyre cable for movement of the present invention, since the conductors are alternately arranged with adjacent child twists and large child twists, the conductors have a so-called solid structure without providing an adhesive layer on the conductors. It is a thing. The solid structure conductor has a resistance to shifting due to bending and ironing because the gap is reduced. Further, the cable insulating layer made of an insulator has a predetermined number of concave vertical grooves formed in the outer peripheral longitudinal direction, and also has circumferential concave lateral grooves formed at predetermined intervals in the outer peripheral longitudinal direction. Since the sheath is surrounded so as to enclose the concave vertical groove and the concave horizontal groove of the layer, the cable insulating layer and the sheath are firmly integrated, and resistance to displacement of each component of the cabtire cable due to bending or ironing is achieved. It has power.

[0009]

The present invention will be described below in detail with reference to examples. The same parts as those of the conventional one are designated by the same reference numerals, and detailed description thereof will be omitted. The moving cabtire cable of the present invention will be described with reference to FIG.
In FIG. 1, a moving cabtire cable 10 includes a conductor 11, an insulating wire core 13, and a sheath 14.

The conductor 11 includes, for example, five large-diameter twisted conductors 11A having a cross-sectional area of 3.5 m ² , and a cross-sectional area of 1.1, for example.
The four small twisted conductors 11B having a small diameter of m ² are alternately arranged so as to be adjacent to and in contact with each other. The insulated wire core 13 is
For example, an outer diameter of 9.7 mm is obtained by providing a cable insulating layer 12 on the conductor 11 by extruding a coating made of EP rubber insulating material. Insulated wire core 13
The cable insulating layer 12 is sufficiently filled in the gap between the large-diameter child-twisted conductor 11A and the small-diameter child-twisted conductor 11B forming the conductor 11, and is formed in a solid state.

On the outer periphery of the cable insulating layer 12 of the insulated core 13, a predetermined number of concave vertical grooves 1 such as six are provided in the longitudinal direction.
2A is formed. Further, circumferential concave groove 12B is formed at a predetermined interval in the outer peripheral longitudinal direction. The moving cabtire cable 10 of the present embodiment has a concave vertical groove 12A and a concave horizontal groove 12B on the outer periphery of the cable insulating layer 12.
The outer circumference of the insulated wire core 13 provided with is surrounded by the concave vertical groove 12A and the concave horizontal groove 12B so that, for example, a chloroprene rubber sheath 14 is extruded to have an outer diameter of 13.5 mm. Has become.

The moving cabtire cable 1 of this embodiment
0 indicates that the cable insulation layer 12 is sufficiently filled in the gap between the large-diameter child-twisted conductor 11A and the small-diameter child-twisted conductor 11B in which the insulated wire core 13 constitutes the conductor 11 as described above, and is in a state of being fully filled. Since it is formed, when the cabtire cable is subjected to bending and ironing, the conductor 11 and the cable insulating layer 12
And have a resistance to deformation and displacement. Further, since the concave vertical groove 12A and the concave horizontal groove 12B of the cable insulating layer 12 are surrounded and covered by the sheath 14 all together on the outer circumference of the insulating wire core 13, the cable insulating layer 12 and the sheath 14 are covered. And have a resistance to deformation and displacement.

The insulated wire core 13 of the moving cabtire cable 10 described above is accommodated in the die 22 when a sheath coating machine 21 is used to coat the cabtire cable 10 with, for example, an EP rubber insulator. The cable insulation layer 1 is formed by the protrusion 23 provided on the
A rotary marking machine in which a pair of rotary marking rolls 24a having a plurality of semi-circular convex portions provided at regular intervals on the semi-circular outer peripheral edge are brought into contact with each other after forming a concave vertical groove 12A on the outer circumference of the two. At the outer periphery of the cable insulation layer 12 at 24
It can be formed by providing A and the concave lateral groove 12B. FIG. 2B is a side view of FIG. Therefore, as in the past, in order to integrate each constituent member, selection of materials and adhesives that are easy to adhere, addition of a heating and pressurizing step, tightening with tape or knitting yarn to form an adhesive layer, etc. Can be manufactured without the need for a cheaper cabtire cable for transportation.

The moving cabtire cable 10 was measured using a testing machine as shown in FIG. 3 in order to test the strength against repeated bending and ironing.
In FIG. 3, 31 and 32 are fixed reels having a reel diameter of 230 mm, and 33 is a trolley provided with casters 34 that reciprocate between the fixed reels 31 and 32. Three rotating reels 35 each having a reel diameter of 230 mm are arranged in a row above the carriage 33.

One end of the moving cabtyre cable 10 is fixed to one fixed reel 31 of the above tester, and the other end of the moving cabtyre cable 10 is fixed to the other end.
A load of ² Kg / (cable area) mm ² is applied and locked to the other fixed reel 32 of the testing machine, and the midway of the moving cabtire cable 10 is shown between three rotating reels 34 of the testing machine in FIG. Stagger alternately. In the above state, the number of times buckling of the cabtire cable 10 occurred was measured at a reciprocating width of 2.5 m and a moving speed of 4 reciprocations / minute.
For comparison, the same measurement was performed on the conventional cabtire cable 50 shown in FIG. 5 and the cabtire cable 60 shown in FIG. In addition,
In the conventional cabtire cable 50 and cabtire cable 60, the conductor has a cross-sectional area of 22 mm ² , the insulated wire core 13 has an outer diameter of 9.4 mm, and the chloroprene rubber sheath 14 has an outer diameter of 13.2 mm. It has substantially the same dimensions as the cabtire cable 10.

Table 1 shows the test results of the cabtyre cable 10 of the present invention, the conventional cabtyre cable 50 and the cabtyre cable 60.

[0017]

[Table 1]

As a result of the above, the cabtire cable 10 of the present invention has a one-digit life extension compared to the conventional cabtire cable 50 having no reinforcing layer, and the conventional cabtire cable 60 having an integrated structure. It was found that the life was about the same and the resistance to bending and ironing was reinforced.

In the above embodiment, the cabtire cable 10 is a round cabtire cable having a single conductor, but the conductor is not limited to a single core, and is not limited to the round cabtire cable. Alternatively, the conductor may be a round-shaped cabtire cable for moving 40A having three cores as shown in FIGS. 4A and 4B, or a flat cabtire cable for moving may have three conductors. It may be 40B. 4A and 4B, the same members as those of the moving cabtire cable 10 of FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted.

[0020]

As described above, according to the cabtyre cable for movement of the present invention, since the conductors are alternately arranged such that the adjacent twists are the large twists and the small twists, the adhesive layer is provided on the conductors. Instead, the conductor has a so-called solid structure, and the gap between the conductors is reduced, so that the conductor has resistance against displacement due to bending or ironing. Further, the cable insulating layer made of an insulator has a predetermined number of concave vertical grooves formed in the outer peripheral longitudinal direction, and also has circumferential concave lateral grooves formed at predetermined intervals in the outer peripheral longitudinal direction. Since the sheath is surrounded so as to enclose the concave vertical groove and the concave horizontal groove of the layer, the cable insulating layer and the sheath are firmly integrated, and resistance to displacement of each component of the cabtire cable due to bending or ironing is achieved. It has power.

Further, according to the cabtyre cable for movement of the present invention, in order to integrate the respective constituent members as in the conventional case, selection of a material and an adhesive which are easily adhered, addition of a heating and pressurizing step and adhesion are performed. The cabtyre cable for transportation can be manufactured at a lower cost because it can be manufactured without tightening with a tape or a knitting yarn to form the agent layer.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of a moving cabtire cable of the present invention.

2 (a) and 2 (b) are explanatory views showing a state in which an insulating core of the moving cabtire cable of FIG. 1 is manufactured.

FIG. 3 is an explanatory view showing a tester for a moving cabtire cable.

FIG. 4A is a partially cutaway perspective view showing another embodiment of the moving cabtire cable of the present invention.
(B) is a perspective view showing another embodiment of the moving cabtire cable of the present invention.

FIG. 5 is a cross-sectional view showing an example of a conventional moving cabtire cable.

FIG. 6 is a cross-sectional view showing another example of the conventional moving cabtire cable.

[Explanation of symbols]

 10 cabtyre cable for movement 11 conductor 11A large-diameter twisted conductor 11B small-diameter twisted conductor 12 cable insulating layer 12A convex vertical groove 12B convex lateral groove 13 insulated wire core 14 sheath

Claims (1)

[Claims] 1. A cabtyre cable for movement in which a conductor is coated with an insulating material to provide a cable insulating layer, and a sheath is provided on the cable insulating layer, wherein the conductor has alternating adjacent conductor twists of large and small twists. The cable insulating layer has a predetermined number of concave vertical grooves formed in the outer peripheral longitudinal direction, and has circumferential concave lateral grooves formed at predetermined intervals in the outer peripheral longitudinal direction. A cabtire cable for movement, characterized in that it encloses the concave vertical groove and the concave horizontal groove of the cable insulating layer so as to wrap around.