JP3649212B2 - Thermal fusion tube composite insulated cable - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tube composite insulated cable that is a composite line of an insulated cable for communication or power feeding and a hollow tube cable for fluid to be controlled by air or the like, which is used as a control line for a robot or the like, and in particular, between the cables. The present invention relates to a heat-sealed tube composite insulated cable formed by heat-sealing.
[0002]
[Prior art]
FIG. 4 shows a usage state of the composite cable used for controlling the robot or the like. Reference numeral 31 denotes a movable part which is a part of the robot, and is connected to one end of the composite cable 30. The other end of the composite cable 30 is connected to a control unit side (not shown). The composite cable 30 is subjected to a bending operation as the movable portion 31 moves. Moreover, the movable part 31 is provided with an operation mechanism by fluid control such as an air cylinder. FIG. 3 is a cross-sectional view of the composite cable 30, which includes an insulated cable 21 for performing communication or power supply and a tube cable 22 for performing control by fluid. The insulated cable 21 and the tube cable 22 are arranged in parallel, and the adjacent portions of the extrusion coating layer 23 serving as the outer cover thereof are integrated by heat fusion.
[0003]
In manufacturing this composite cable 30, hot air is applied to the portions where the insulated cables 21 or between the insulated cables 21 and the tube cable 22 are heat-sealed, and the extruded coating layer 23 is partially melted. The coating layer 23 is brought into contact and fused (JP-A-5-274922).
[0004]
[Problems to be solved by the invention]
However, with the structure of the conventional composite cable 30, the tube cable 22 side contracts more than the insulated cable 21 side due to heating by heat fusion performed in the manufacturing process. There has been a problem that an irregular shape such as a wave is formed, or in the worst case, the heat-sealed portion is partially peeled off. As a result, there is a possibility that not only the appearance is deteriorated but also the heat-sealed part is peeled off by the bending operation of the composite cable 30 and the respective insulated cables 21 and tube cables 22 constituting the composite cable 30 are scattered. There was also sex.
[0005]
An object of the present invention is to solve the above-mentioned problems and to provide a heat fusion type tube composite insulated cable in which insulated cables and tube cables are arranged in an orderly manner.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides an insulating cable having a first extruded coating layer on the outer periphery of an insulating core having an insulating wire having an insulating coating provided on the outer periphery of a conductor, and a hollow cable. A heat-sealable tube comprising a tube cable provided with a second extrusion coating layer on the outer periphery, wherein the first extrusion coating layer of the insulated cable and the second extrusion coating layer of the tube cable are heat-sealed. in the composite insulated cable, between said hollow tube and said second extruded covering layer, the heat-fusible heat-shrinkage due to heating during the an intermediate layer is the insulating core and equal to or less than, the intermediate layer The braiding is made of a metal foil yarn obtained by winding a metal foil around the outer periphery of the high-tensile fiber .
[0008]
As the material of the first and second extrusion coating layers, polyolefin-based thermoplastic resins such as polyethylene, polyvinyl chloride-based thermoplastic resins such as polyvinyl chloride, or thermoplastics produced by blending thermoplastic resin and rubber An elastomer is used. A specific example of the thermoplastic elastomer is a urethane-based thermoplastic elastomer obtained by blending polyvinyl chloride and urethane rubber.
[0009]
Examples of the material of the hollow tube include nylon thermoplastic resins, nylon thermoplastic elastomers, and flexible polyurethanes.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. Three insulated cables 1 and two tube cables 2 are arranged in parallel, and adjacent cables are integrated by heat fusion. As a method of performing heat fusion, hot air fusion is known as the simplest and most suitable method. The portions where the insulation cables 1 or the insulation cable 1 and the tube cable 2 are heat-sealed are heated by hot air to partially melt the extrusion coating layers 3 and 4 and bring the adjacent extrusion coating layers 3 and 4 into contact with each other. This is a method of fusing. As another heat fusion method, there is heat fusion using a hot roll or the like.
[0011]
The insulated cable 1 has a structure in which an extruded coating layer 4 is provided on the outer periphery of insulating cores 8a, 8b, and 8c each having one or a plurality of insulating wires 7 each having an insulating coating 6 provided on the outer periphery of a conductor 5. Yes. Each insulation core 8a, 8b, 8c defines the size and number of insulation wires 7 according to the application. The insulating core 8a has a structure in which a shield layer 9 is provided. In addition, since the insulation cable 1 has the extrusion coating layer 4 formed on the outer periphery of the insulation cores 8a, 8b, and 8c by extrusion coating, the insulation cores 8a, 8b, and 8c and the extrusion coating layer 4 are not in a loose state. The structure is in close contact.
[0012]
As a structure of the tube cable 2, an intermediate layer 11 is provided on the outer periphery of the hollow tube 10, and an extrusion coating layer 3 is formed on the outer periphery of the intermediate layer 11 by extrusion coating. The intermediate layer 11 and the extrusion coating layer 3 are not in a loose state but are in close contact with each other.
[0013]
Here, as the material of the intermediate layer 11, a material whose thermal shrinkage due to heating at the time of the thermal fusion is equal to or less than that of the insulating cores 8a, 8b, 8c is used. For example, the intermediate layer 11 is preferably a braid made of a metal strand such as a tin-plated copper wire, and more preferably a metal foil yarn formed by winding a metal foil such as a copper foil around the outer periphery of a high-tensile fiber. It is good to be a braid. By using the braid, it is possible to suppress a decrease in the bending of the heat-sealing tube composite insulated cable due to the provision of the intermediate layer 11. Further, the winding angle θ of the braid is preferably 45 degrees or less, more preferably 20 degrees or less. FIG. 2 is a side view showing a state in which the braid 20 is wound around the hollow tube 10. The winding angle θ is an angle with respect to a line a in the longitudinal direction of the cable, as shown in FIG. By setting the winding angle in the above range, it is possible to effectively suppress thermal contraction in the longitudinal direction of the tube cable 2 due to heating during heat fusion. Other materials for the intermediate layer include those obtained by winding a metal wire such as tin-plated copper wire, winding a metal tape with an adhesive, and aramid fiber (DuPont's trade name “Kevlar®” ( In addition, Kevlar (R) is a registered trademark of DuPont.)) And the like.
[0014]
According to this Embodiment, since it has the intermediate | middle layer 11 in the tube cable 2, the thermal contraction of the tube cable 2 by the heating at the time of heat sealing | fusion can be suppressed. As a result, it is possible to provide a heat fusion type tube composite insulated cable excellent in quality with good appearance in which the insulated cable 1 and the tube cable 2 are arranged in an orderly manner.
[0015]
As the material of the extrusion coating layers 3 and 4, a polyolefin-based thermoplastic resin such as polyethylene, a vinyl chloride-based thermoplastic resin such as polyvinyl chloride, or a thermoplastic elastomer produced by blending a thermoplastic resin and rubber is used. . A specific example of the thermoplastic elastomer is a urethane-based thermoplastic elastomer obtained by blending polyvinyl chloride and urethane rubber. The materials of the extrusion covering layers 3 and 4 of the insulated cable 1 and the tube cable 2 that are arranged in parallel are preferably the same in consideration of the ease of fusion, but different materials may be used for each one. Absent.
[0016]
Examples of the material of the hollow tube 10 include nylon thermoplastic resins, nylon thermoplastic elastomers, and flexible polyurethanes.
[0017]
In the description of the present embodiment, the tube cable 2 is arranged at both ends. However, as another embodiment, the tube cable 2 is arranged at the center, the tube cable 2 is arranged at one end, and every other insulation cable 1. However, the present invention is not limited to this embodiment, and may employ other transmission means such as an optical fiber as the configuration of the insulated cable 1. is not.
[0018]
【The invention's effect】
As described above, according to the present invention, the difference in thermal shrinkage between the insulated cable and the tube cable due to heating at the time of heat fusion can be suppressed, so that the appearance in which the insulated cable and the tube cable are arranged in an orderly manner is good. A heat fusion tube composite insulated cable can be provided.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a heat fusion tube composite insulated cable of the present invention.
FIG. 2 is a side view showing a state in which a braid is wound around a hollow tube.
FIG. 3 is a cross-sectional view showing an example of a conventional composite cable.
FIG. 4 is an explanatory diagram showing a use state of the composite cable.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Insulated cable 2 Tube cable 3, 4 Extrusion coating layer 5 Conductor 6 Insulation coating 7 Insulating element wire 8a, 8b, 8c Insulating core 9 Shield layer 10 Hollow tube 11 Intermediate layer

Claims (1)

An insulated cable having a first extruded coating layer on the outer circumference of an insulating core having an insulating element wire with an insulating coating provided on the outer circumference of the conductor, and a second extruded coating layer on the outer circumference of the hollow cable In the heat fusion type tube composite insulation cable composed of a tube cable, wherein the first extrusion coating layer of the insulation cable and the second extrusion coating layer of the tube cable are heat-sealed,
An intermediate layer is provided between the hollow tube and the second extrusion coating layer, the thermal shrinkage of which is equal to or less than that of the insulating core by heating at the time of the thermal fusion , and the intermediate layer is made of high-tensile fiber. A heat-sealable tube composite insulated cable, characterized in that it is a braid made of a metal foil thread formed by winding a metal foil around the outer periphery .

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