TWI656539B - Flat cable for mobil part wiring - Google Patents

Abstract

The present invention provides a flat cable for a movable member wiring which can sufficiently maintain straightness when repeatedly receiving a U-shaped bending without using a cable drag chain (registered trademark) or a resin plate. The flat cable for a movable member wiring of the present invention has a first flat cable 102 in which a plurality of first movable member wiring cables 101 are arranged in parallel, and a plurality of second movable member wiring cables 103 are arranged side by side. a second flat cable 104 and a binding tool 105 for overlapping and fixing the cables 103 and 104; wherein the first movable member wiring cable 101 has lower flexibility than the second movable Cable for wiring 103.

Description

Flat cable for movable parts wiring

The present invention relates to a flat cable for a movable member wiring, wherein a plurality of movable member wiring cables are integrally formed in a continuous cylindrical shape, and the plurality of movable member wiring cable systems are on a manufacturing line such as a precision device. It is used in movable parts that are subjected to repeated U-bending in industrial robots and the like.

As shown in Fig. 3, the movable device wiring cable 300 is a movable member that is subjected to repeated U-bending in an industrial robot or the like used in a manufacturing line such as a precision machine, and includes a twist line 301; The object 302 is embedded in the gap of the circular section of the twisted line 301; the adhesive tape 303 is wound around the twisted line 301; the protective layer 304 is disposed around the adhesive tape 303; and the sheath 305 is disposed on the protective layer. Around 304.

The movable member wiring cable 300 is required to be able to repeatedly receive the flexibility of the U-shaped bending while suppressing the dust generated by repeating the U-shaped bending, thereby preventing the occurrence of product defects. A sheath 305 formed of a material having a high-softness resin such as a polyvinyl chloride resin, a polyurethane resin, or a polyolefin resin as a main component and having a clean room suitability certification by IPA is used.

Further, since the movable member wiring cable 300 has high flexibility, when the U-shaped bending is repeatedly received, the opposite ends of the bent portion are suspended by gravity, and the parallel state cannot be maintained, that is, The portion other than the bent portion cannot maintain a state in which the straight line extends (hereinafter referred to as straightness), and the movable member wiring cable 300 has a fear of being vibrated or broken due to repeated U-bend bending.

When the movable member wiring cable 300 is disposed, the plurality of movable member wiring cables 300 are arranged and housed in a cable drag chain (registered trademark) formed of a highly rigid metal or resin, thereby suppressing Both end portions facing each other across the bent portion are suspended by gravity (for example, refer to Patent Document 1).

In addition, in recent years, smart phones and tablet computers are rapidly becoming popular, and the production line operation rate of these products is increasing year by year, so that the speed of industrial machinery for production lines is required. Then, with the increase in the speed of the industrial machine or the like, the movable device wiring cable 300 repeatedly receives the U-shaped bending at a higher speed than in the past.

Therefore, even when the cable for the movable member wiring 300 is wired, the cable (the registered trademark) is used, and when the U-shaped bending is repeatedly received at a high speed, the movable member wiring cable 300 cannot maintain the straightness. It is easy to contact the cable drag chain (registered trademark) by sag at the opposite end portions of the bent portion, and even if the sheath 305 formed by the material for the clean room suitability authentication by IPA is used, There is a concern that the product is damaged due to abrasion and damage caused by abrasion.

On the other hand, it is considered that a resin sheet formed of a fluororesin or the like having high wear resistance and rigidity and low friction property supports a plurality of movable member wiring cables 300, and a plurality of movable members are bundled with a rope or the like. The wiring cable 300 is fixed to the resin plate, whereby the both end portions facing each other across the bent portion can be prevented from sagging due to gravity.

In this case, even when the U-shaped bending is repeatedly applied at a high speed, the movable member wiring cable 300 is rubbed against the resin sheet, and the resin sheet is made of a fluororesin having high abrasion resistance, high rigidity, and low friction. In the case of using a cable drag chain (registered trademark), it is possible to reduce the risk that the movable device wiring cable 300 is damaged by abrasion and the dust is generated by abrasion to cause product defects.

Further, since the resin sheet is smaller than the cable drag chain (registered trademark), the wiring space can be reduced by using the resin sheet as compared with the case of using the cable drag chain (registered trademark).

[First technical literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2008-243839

[Patent Document 2] Japanese Patent Laid-Open No. 3-245417

[Patent Document 3] Japanese Laid-Open Patent Publication No. 63-29412

[Patent Document 4] International Publication No. 00/56825

However, as described above, since the resin sheet is formed of a fluororesin or the like having high wear resistance and high rigidity and low friction, even if the movable member wiring cable 300 is fixed to the resin sheet by the binding tool, Since the movable member wiring cable 300 slides on the surface of the resin sheet, it is difficult to securely fix the movable member wiring cable 300 to the resin sheet, and there is a problem that the straightness cannot be sufficiently maintained.

Accordingly, an object of the present invention is to provide a flat cable for a movable member wiring, which can sufficiently maintain straightness when repeatedly receiving a U-shaped bending without using a cable drag chain (registered trademark) or a resin plate.

In order to achieve the object, the present invention provides a flat cable for a movable member wiring, comprising: a first flat cable in which a plurality of first movable member wiring cables are arranged in parallel, and a plurality of second movable members a second flat cable in which the wiring cables are arranged in parallel, and a binding tool for superimposing and fixing the first flat cable and the second flat cable, wherein the first movable member wiring cable The flexibility is lower than the cable for the second movable member wiring.

The first movable member wiring cable includes: a twisted wire; a filler embedded in a gap of a circular cross section of the twisted wire; a tape wrapped around the twisted wire; and a protective layer disposed around the adhesive tape And a sheath disposed around the protective layer and having an inner sheath disposed around the protective layer and an outer sheath disposed around the inner sheath, wherein the inner sheath may be made of polyvinyl chloride Any one of a resin, a polyurethane resin or a polyolefin resin; the outer sheath may be formed of a fluororubber, a fluororesin or a mixture of a fluororubber and a fluororesin.

The outer sheath is formed of "a mixture of a fluororubber and a fluororesin in a mass ratio of 95:5 to 20:80".

The outer sheath contains a mixture of a fluororubber and a fluororesin in a mass ratio of 95:5 to 20:80; the fluororesin contains a polytetrafluoroethylene and a molten fluororesin in a mass ratio of 99.5:0.5 to 75:25. .

The second movable member wiring cable includes: a twisted wire; a filler embedded in a gap of a circular cross section of the twisted wire; a tape wrapped around the twisted wire; and a protective layer disposed around the adhesive tape And a sheath disposed around the protective layer, the sheath being formed of any one of a polyvinyl chloride resin, a polyurethane resin, or a polyolefin resin.

The outer diameter of the first movable member wiring cable can be the same as the outer diameter of the second movable member wiring cable.

According to the present invention, it is possible to provide a flat cable for a movable member wiring which can sufficiently maintain straightness when repeatedly receiving a U-shaped bending without using a cable drag chain (registered trademark) or a resin plate.

100‧‧‧flat cable for movable parts wiring

101‧‧‧1st movable member wiring cable

102‧‧‧1st flat cable

103‧‧‧2nd movable member wiring cable

104‧‧‧2nd flat cable

105‧‧‧Bundle tools

106‧‧‧捻

107‧‧‧Filling

108‧‧‧ Tape

109‧‧‧Protective layer

110‧‧‧ sheath

111‧‧‧ Inner jacket

112‧‧‧ outer sheath

113‧‧‧Wire

114‧‧‧

115‧‧‧ sheath

300‧‧‧Removable parts wiring cable

301‧‧‧捻

302‧‧‧Filling

303‧‧‧ tape

304‧‧‧Protective layer

305‧‧‧ sheath

1 is a schematic cross-sectional view showing a flat cable for a movable member wiring according to the present invention; FIG. 2 is a side view showing a flat cable for a movable member wiring of the present invention; and FIG. 3 is a view showing a movable member wiring of the prior art. A schematic view of the cross section of the cable.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1 and FIG. 2, in the flat cable 100 for a movable member wiring according to a preferred embodiment of the present invention, a plurality of first movable member wiring cables 101 are arranged in parallel (integrally formed). The first flat cable 102 of the continuous tubular shape is overlapped with the second flat cable 104 which is arranged in parallel with the plurality of second movable member wiring cables 103 (integrated to form a continuous cylindrical shape) and is bundled by the tool 105. When the U-shaped bending is repeatedly received, the first flat cable 102 is disposed inside the bent portion, and the second flat cable 104 is disposed outside the bent portion.

In the flat cable 100 for the movable member wiring, the second flat cable 104 is supported by the first flat cable 102, and the straight cable of the movable member wiring 100 is ensured. Therefore, the first movable member wiring is used. The flexibility of the cable 101 is lower than that of the second movable member wiring cable 103. Here, the low flexibility means that when the cable of the same length is prepared, one end of each cable is fixed, and the same load is applied to the other end, the amount of deflection of the cable is small. In addition, as a method of adjusting the flexibility of the cable, for example, a method of changing the wire diameter of the wire constituting the twisted wire of the movable member wiring cable, or a method of changing the metal material of the twisted wire or the like.

The first movable member wiring cable 101 includes a twisted wire 106, a filler 107 embedded in a gap of a circular cross section of the twisted wire 106, a tape 108 wound around the twisted wire 106, and a protective layer 109 provided on the tape. a periphery of 108; and a sheath 110 disposed around the protective layer 109 There is an inner sheath 111 provided around the protective layer 109 and an outer sheath 112 provided around the inner sheath 111.

The twisted wire 106 is formed by twisting a plurality of wires 113; the wire 113 is composed of an insulated wire having a conductor and an insulator provided around the conductor or a coaxial cable having an inner conductor and an outer conductor.

By burying the filler 107 in the gap of the circular section of the rifling 106, the arrangement of the plurality of wires 113 is fixed, so that the symmetry of the ridge 106 in the cable profile can be maintained over the entire length of the cable. It is possible to suppress the impedance variation in the entire length direction of the cable.

The tape 108 is formed of a highly smooth material such as oil paper, fluororesin, nylon resin or polyethylene terephthalate resin, and partially overlaps the adjacent tape 108 when it is wound around the twist line 106. The way to wrap the winding.

Thereby, the plurality of electric wires 113 become difficult to be unwound, and the arrangement of the plurality of electric wires 113 can be fixed, so that the symmetry of the rifling 106 in the cable cross section can be maintained over the entire length direction of the cable, and the symmetry can be maintained. The impedance variation in the entire length direction of the cable is effectively suppressed.

The protective layer 109 is composed of a "woven protective layer formed by knitting a plurality of wires" or a "wound protective layer formed by spirally winding a plurality of wires".

By providing the protective layer 109 around the twist line 106, the electromagnetic interference interference (EMI) characteristics of the first movable member wiring cable 101 can be improved.

The inner layer sheath 111 is formed of any one of a polyvinyl chloride resin, a polyurethane resin, or a polyolefin resin.

By using the inner layer sheath 111 formed of these materials, the flexibility of the first movable member wiring cable 101 can be improved, and the bending resistance of the movable member wiring flat cable 100 can be improved.

The outer sheath 112 is formed of any one of a fluororubber, a fluororesin, or a mixture of a fluororubber and a fluororesin.

The fluororesin preferably contains polytetrafluoroethylene and a molten fluororesin in a mass ratio of 99.5:0.5 to 75:25.

Further, the mixture preferably contains a fluororubber and a fluororesin in a mass ratio of 95:5 to 20:80. As a mixture satisfying such a mass ratio, DAI-EL (registered trademark) Fluoro TPV manufactured by Daikin Industries Co., Ltd. can be exemplified.

By using the outer layer sheath 112 formed of these materials, the first movable member wiring cable 101 can be appropriately rigid, and the straightness of the movable member wiring flat cable 100 can be improved.

In particular, by using the outer layer sheath 112 formed by the mixture, both the abrasion resistance and the low dusting property of the fluororesin and the softness and elasticity of the fluororubber can be achieved (the elasticity can be improved in repeatedly receiving the U-shaped bending In the case where the flexibility and the bending resistance of the first movable member wiring 101 are not impaired, the straightness at the time of repeatedly receiving the U-shaped bending can be improved.

Further, the outer layer sheath 112 has the characteristics of fluororubber and fluororesin, that is, oil resistance, chemical resistance, weather resistance, etc., and can be used even in oil, acid, and alkaline environments, and is also suitable for exposure. Outdoor use in the case of ultraviolet light and acid rain.

Further, the thickness of the outer layer sheath 112 is preferably 0.25 mm or more. This is because when the thickness of the outer sheath 112 is less than 0.25 mm, when the first movable member wiring cable 101 repeatedly receives the U-bend, it is easy to form wrinkles in the outer sheath 112, and wrinkles are developed. Cracking, causing the inner sheath 111 to be exposed.

Further, the thickness of the outer sheath 112 is preferably 1/3 to 1/2 of the thickness of the inner sheath 111. This is because the thickness of the outer sheath 112 is less than 1/3 of the thickness of the inner sheath 111, which may be caused by the long-term (for example, about 5 years) use of the flat cable 100 for the movable member wiring, resulting in an outer sheath. 112 wear causes the inner jacket 111 to be exposed. In addition, when the thickness of the outer layer sheath 112 is 1/2 or more of the thickness of the inner layer sheath 111, the flexibility of the first movable member wiring cable 101 is impaired, and it is difficult to maintain the bending resistance equivalent to the conventional one. .

Further, the outer diameter of the first movable member wiring cable 101 is preferably the same as the outer diameter of the second movable member wiring cable 103.

Thereby, when the first flat cable 102 and the second flat cable 104 are overlapped, the first flat cable 102 and the second flat cable 104 are engaged with each other by the uneven portion 114 on the surface.

Therefore, when the flat cable 100 for the movable member wiring repeatedly receives the U-bend, the second flat cable 104 does not slide on the surface of the first flat cable 102, and the first flat cable 102 can be bundled by the tool 105. Since the second flat cable 104 is securely fixed, the straightness of the flat cable 100 for the movable member wiring can be maintained as compared with the case of using the resin plate.

The second movable member wiring cable 103 includes a twisted wire 106, a filler 107 embedded in a gap of a circular cross section stored in the twisted wire 106, and a tape 108 wound around the twisted wire 106; The protective layer 109 is disposed around the adhesive tape 108; and the sheath 115 is disposed around the protective layer. In other words, the second movable member wiring cable 103 is different from the first movable member wiring cable 101 only in the sheath 115.

Like the inner layer sheath 111, the sheath 115 is formed of any one of a polyvinyl chloride resin, a polyurethane resin, or a polyolefin resin.

By using the sheath 115 formed of these materials, the flexibility of the second movable member wiring cable 103 can be improved, and the bending resistance of the movable member wiring flat cable 100 can be improved.

The binding tool 105 is composed of a rope or the like, and fixes the first flat cable 102 and the second flat cable 104 in a part of the longitudinal direction of the cable.

In this case, in the flat cable 100 for the movable member wiring, since the first flat cable 102 and the second flat cable 104 are engaged with each other by the uneven portion 114 on the surface, the resin flat plate can be reduced in comparison with the case where the resin plate is used. The binding tool 105 is fixed, and the softness of the flat cable 100 for the movable member wiring can be suppressed from being lowered by the fixing of the binding tool 105.

Further, the total length of the first flat cable 102 is shorter than that of the second flat cable 104. When the flat cable 100 for the movable member wiring is repeatedly subjected to U-bending, the first flat cable 102 can be prevented from being attached. Excessive stress of either of the second flat cables 104.

As described above, the flat cable 100 for movable member wiring according to the present embodiment has the first flat cable 102 having appropriate rigidity and the second flat cable 104 having higher flexibility than the first flat cable 102. When the flat cable 100 for the movable member wiring is repeatedly subjected to the U-shaped bending, the first flat cable 102 can be used instead of the resin plate to support the second flat cable 104, and the two opposing portions facing the bent portion can be suppressed. The end portion is drooped by gravity, and the straightness can be sufficiently maintained.

In addition, since the first flat cable 102 and the second flat cable 104 have a two-stage structure, the flat cable 100 for the movable member wiring can be reduced in size to a width of about half as compared with the original required width. It can greatly contribute to reducing the wiring space.

Claims (6)

A flat cable for a movable member wiring, comprising a first flat cable in which a plurality of first movable member wiring cables are arranged in parallel, and a plurality of second movable member wiring cables are arranged in parallel 2 flat cable and superimposing and fixing the first flat cable and the second flat cable so that the first movable member wiring cable contacts the second movable member wiring cable The binding tool is characterized in that the first flat cable is disposed inside the second flat cable when the U-shaped is bent, and the first movable cable is softened by the first movable member wiring cable. The performance is lower than the second movable member wiring cable constituting the second flat cable. The flat cable for a movable member wiring according to the first aspect of the invention, wherein the first movable member wiring cable includes: a twisted wire; and the filler is embedded in a gap of a circular cross section of the twisted wire; a tape attached to the periphery of the twist line; a protective layer disposed around the tape; and a sheath disposed around the protective layer, having an inner sheath disposed around the protective layer and disposed therein An outer sheath surrounding the sheath; the inner sheath is formed of any one of a polyvinyl chloride resin, a polyurethane resin or a polyolefin resin; the outer sheath is made of a fluororubber, a fluororesin or a fluorine Any of a mixture of rubber and fluororesin is formed. The flat cable for movable member wiring according to claim 2, wherein the outer sheath is formed of a mixture containing a fluororubber and a fluororesin in a mass ratio of 95:5 to 20:80. The flat cable for movable member wiring according to the second aspect of the invention, wherein the outer sheath comprises a mixture of a fluororubber and a fluororesin in a mass ratio of 95:5 to 20:80; 99.5: a mass ratio of 0.5 to 75:25 of polytetrafluoroethylene and a molten fluororesin. The flat cable for a movable member wiring according to any one of claims 1 to 4, wherein the second movable member wiring cable includes: a twisted wire; and the filler is embedded in the cable The gap of the circular section of the twist line: a tape wrapped around the twist line; a protective layer disposed around the tape; and a sheath disposed around the protective layer; the sheath is made of polyvinyl chloride resin Any of a polyurethane resin or a polyolefin resin. The flat cable for a movable member wiring according to the first aspect of the invention, wherein the outer diameter of the first movable member wiring cable is the same as the outer diameter of the second movable member wiring cable.