JP2017005943A - Movable wiring structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a movable wiring structure that is able to prevent a movable part wiring cable from slacking and coming into contact with a structure such as a cable bear.SOLUTION: A movable wiring structure 100 comprises: a movable-part wiring cable 102 having a shield 101 formed from a magnetic material and wired on a movable part repeatedly bent in U-shape; and a magnet 103 that prevents slack of the movable part wiring cable 102 by pulling together the shield 101 when the movable-part wiring cable 102 is repeatedly bent in U-shape.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a movable wiring structure that repeatedly undergoes U-shaped bending.

  Conventionally, in a precision manufacturing line for manufacturing semiconductors, liquid crystal screens, etc., it is possible to prevent twisting or disconnection of a movable part wiring cable that repeatedly receives U-bending in accordance with the operation of an industrial robot. Therefore, the movable part wiring cable is held by a cable bear (registered trademark) (see, for example, Patent Document 1).

  As shown in FIG. 3, the movable part wiring cable is formed by winding a binding tape 304 around a stranded wire 302 formed by twisting a plurality of electric wires 301 via an interposer 303, and wrapping a plurality of strands around the stranded wire. There is known a movable part wiring cable 300 obtained by sequentially covering a shield 305 such as a braided shield or a transversely wound shield formed by braiding or winding, and a jacket 306.

JP 2008-243839 A

  However, in the movable part wiring cable 300, a highly flexible resin such as polyvinyl chloride (PVC) resin, polyurethane (PU) resin, or polyolefin (PO) resin is used to prevent disconnection due to repeated U-shaped bending. Therefore, it is difficult to maintain the straightness of the movable part wiring cable 300 when it is repeatedly subjected to U-shaped bending. May sag and come into contact with a structure such as a cable bear. As a result, the movable part wiring cable 300 wears and dust generation due to wear increases, which may cause frequent product failures in the precision manufacturing line.

  Then, the objective of this invention is providing the movable wiring structure which can suppress that the cable for movable part wiring hangs down and contacts structures, such as a cable bear.

  The present invention has a shield formed of a magnetic material and is wired to a movable part that is repeatedly subjected to U-shaped bending, and the shield when the movable part wiring cable is repeatedly subjected to U-shaped bending. And a magnet that suppresses the movable part wiring cable from drooping by being pulled.

  The magnetic body is preferably made of stainless steel.

  The magnet is preferably an electromagnet.

  The magnet is preferably rounded in shape.

  It is desirable that the surface of the magnet is lubricated.

  ADVANTAGE OF THE INVENTION According to this invention, the movable wiring structure which can suppress that the cable for movable part wiring hangs down and contacts structures, such as a cable bear, can be provided.

It is a side view which shows the movable wiring structure of this invention. It is a cross-sectional view which shows the cable for movable part wiring of FIG. It is a cross-sectional view which shows the conventional cable for movable part wiring.

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

  As shown in FIGS. 1 and 2, a movable wiring structure 100 according to an embodiment of the present invention has a shield 101 formed of a magnetic material, and is movable repeatedly subjected to U-bending as the industrial robot slides. A movable part wiring cable 102 wired to the part, and a magnet 103 that pulls the shield 101 and prevents the movable part wiring cable 102 from drooping when the movable part wiring cable 102 repeatedly receives a U-bend. I have.

  The movable part wiring cable 102 is obtained by winding a bind tape 107 around an stranded wire 105 formed by twisting a plurality of electric wires 104 through an interposition 106, and knitting or wrapping a plurality of strands around the wire. It is obtained by sequentially covering a shield 101 such as a braided shield or a horizontal winding shield and a jacket 108.

  Here, the shield 101 is made of a plurality of strands made of a magnetic material, and preferably made of a plurality of strands made of a ferromagnetic material such as stainless steel. In addition, the electric wire 104 includes, for example, an insulated electric wire having a conductor and an insulator provided around the conductor, a coaxial cable having an inner conductor and an outer conductor, or the like.

  The interposition 106 has a function of suppressing a change in impedance by fixing the arrangement of the electric wires 104 in the cross section of the stranded wire 105 and maintaining the symmetry of the electric wires 104 in the cross section of the stranded wire 105 over the cable longitudinal direction. Demonstrate.

  The bind tape 107 is, for example, a paper tape with high lubricity, a resin tape such as polytetrafluoroethylene (ETFE) resin, nylon resin, or polyethylene terephthalate (PET) resin, and is wrapped around the stranded wire 105. Yes. The binding tape 107 prevents the electric wire 104 from being unwound, thereby fixing the arrangement of the electric wire 104 in the cross section of the stranded wire 105 and fixing the cross section of the stranded wire 105 in the longitudinal direction of the cable, like the interposition 106. The function of maintaining the symmetry of the electric wire 104 and suppressing the change in impedance is exhibited.

  The jacket 108 has an inner jacket 109 made of a highly flexible resin such as polyvinyl chloride resin, polyurethane resin, or polyolefin resin, and an outer jacket 110 made of a highly dustproof resin such as a fluororesin. . Thereby, the flexibility and dustproofness of the movable part wiring cable 102 can be improved.

  The magnet 103 is made of an electromagnet, and is configured so that the magnetic force can be adjusted in accordance with how the movable part wiring cable 102 hangs down. As a result, the force for pulling the shield 101 is appropriately adjusted so that the movable part wiring cable 102 and the magnet 103 do not come into contact with each other, and the movable part wiring cable 102 and the structure such as the cable bear do not come into contact with each other. It becomes possible to do.

  Furthermore, it is preferable that the magnet 103 has a round shape and is lubricated with a fluorine coating or the like on the surface. As a result, even if the movable part wiring cable 102 and the magnet 103 come into contact with each other, it is possible to effectively prevent the movable part wiring cable 102 from being worn out or increasing dust generation due to wear. It becomes possible.

  The magnet 103 is attached to a structure 111 such as a cable bear adjacent to the movable part wiring cable 102, for example.

  In addition, when the attachment location of the magnet 103 can be secured in addition to the cable track, by adopting the present invention, the movable part wiring cable 102 does not sag and it is not necessary to use the cable track. It is also possible to construct a movable wiring structure 100.

  As described above, according to the movable wiring structure 100, the shield 101 of the movable part wiring cable 102 is formed of a magnetic material, and the movable part wiring cable 102 is prevented from drooping by being drawn by the magnet 103. Therefore, it is possible to prevent the movable part wiring cable 102 from drooping and coming into contact with a structure such as a cable bear.

  Therefore, by adopting the movable wiring structure 100, it is possible to suppress frequent occurrence of product defects in the precision manufacturing line due to wear of the movable portion wiring cable 102 or increase in dust generation due to wear.

DESCRIPTION OF SYMBOLS 100 Movable wiring structure 101 Shield 102 Cable for movable part wiring 103 Magnet 104 Electric wire 105 Stranded wire 106 Interposition 107 Bind tape 108 Jacket 109 Inner jacket 110 Outer jacket

Claims (5)

A movable part wiring cable that has a shield formed of a magnetic material and is wired to a movable part that repeatedly receives a U-bend;
A magnet that pulls down the shield and prevents the movable part wiring cable from drooping when the movable part wiring cable repeatedly receives a U-bend;
A movable wiring structure characterized by comprising:   The movable wiring structure according to claim 1, wherein the magnetic body is made of stainless steel.   The movable wiring structure according to claim 1, wherein the magnet is an electromagnet.   The movable wiring structure according to claim 1, wherein the magnet has a round shape.   The movable wiring structure according to claim 1, wherein a surface of the magnet is lubricated.

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