JP2009266702A - Self supporting cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self supporting cable capable of restraining vertical variation. <P>SOLUTION: In this self supporting cable 1, a self-supporting auxiliary member formed by arranging, in parallel to each other, and integrating, with each other, a compression-resistant member 21 hardly deformed with respect to compression stress in the cable longitudinal direction and easily deformed with respect to tensile stress in the cable longitudinal direction, and tension-resistant member 22 hardly deformed with respect to tensile stress in the cable longitudinal direction, and a multiple cable 11 are arranged in parallel to each other and integrated with each other. Since the self-supporting auxiliary member resultantly has both compression-resistant function and tensile-resistant function, the multiple cable can be supported while responding to compression stress and tensile stress generated in the multiple cable in moving a movable part, and the vertical variation of the multiple cable in moving the movable part can be almost completely restrained even if the multiple cable is housed in a cable bear. The self-supporting auxiliary member is never scraped because of being integrated with the cable, and the need of the cable bear is obviated, whereby the problem caused by the cable bear is solved. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention includes a multiple cable in which a plurality of cables are arranged in parallel and integrated, and one end side and the other end side of the multiple cable are respectively connected to a movable part and a fixed part that are arranged vertically. For example, the present invention relates to a self-standing cable used for a robot traveling apparatus or the like incorporated in a machining line, a semiconductor manufacturing apparatus, an electronic component mounting apparatus, or the like.

  In a machining line, a semiconductor manufacturing apparatus, and an electronic component mounting apparatus, a robot traveling apparatus for gripping and transporting a workpiece such as a workpiece, a wafer, or a substrate is incorporated. For example, Patent Document 1 (Japanese Patent Laid-Open No. 2005-96018) discloses a machining line in which a plurality of processing machines are arranged on both sides of a track of a robot traveling device. In the robot traveling apparatus, a robot that handles a workpiece is mounted on a traveling carriage that moves on a track. By operating the hand of the arm of the robot, the work can be held by the hand, and the work can be attached to and detached from each processing machine. Further, by moving the traveling carriage along the track, the workpiece can be moved between the processing machines, and a plurality of machining operations can be performed on the workpiece.

  In such a robot traveling device, a cable bear (registered trademark) is laid on the side of the track. The cable bearer is configured such that a plurality of substantially rectangular frames arranged in a row are coupled by a pin so as to be rotatable, and can be bent in the vertical direction. In the space formed inside the cable bear, cables and tubes (hereinafter simply referred to as cables) of signal lines, power lines, power lines, hydraulic lines, and pneumatic lines are housed. One end of the cable bear is folded back in a U shape, and its tip is connected to the traveling carriage. Thereby, the wiring and piping of the cable can be performed in accordance with the sliding of the cable bearer, and the vertical fluctuation of the cable can be suppressed even if the cable cannot stand by itself. And a control signal, motive power, etc. which are required for a running cart and a robot can be supplied, without disturbing a movement of a running cart.

  However, there are cases where dust, vibration, or noise occurs due to friction between the cable bear and the cable. Therefore, for example, Patent Document 2 (Japanese Patent Application Laid-Open No. 2006-228841) includes a bundling member that forms a band-like body by arranging and bundling cables in a plane, and a support body that partially contacts and supports the band-like body. Cable bearers have been proposed. According to this cable bear, rubbing with the cable does not occur and dust generation can be prevented. Further, for example, Patent Document 3 (Japanese Patent Laid-Open No. 2006-159346) proposes a cable bear having a belt / pulley mechanism. According to this cable track, since the pulley drive mechanism does not move in the axial direction integrally with the movable part, it is possible to suppress the occurrence of vibration and noise due to the cable track.

JP-A-2005-96018 JP 2006-228841 A JP 2006-159346 A

  The conventional cable bear described above requires a volume that can accommodate the entire cable, and therefore requires extra power and space for sliding. In addition, the accuracy of the sliding stop position becomes difficult to take due to the inertia of the weight of the cable carrier. In addition, the cost of the cable bear is extra.

  This invention is made | formed in view of the above subjects, The objective is to provide the self-supporting type | mold cable which can suppress a vertical fluctuation.

  In order to achieve the above object, the self-supporting cable of the present invention includes a multiple cable in which a plurality of cables are arranged in parallel and integrated, and a movable part that moves up and down and a fixed part fixed to the fixed part. The self-supporting cable in which one end side and the other end side of the multiple cable are respectively connected, and is not easily deformed by a compressive stress in the cable length direction and is easily deformed by a tensile stress in the cable length direction. A self-supporting auxiliary member in which a compression member and a tension-resistant member that is difficult to deform with respect to the tensile stress in the cable length direction are arranged in parallel and integrated with the multiple cable in parallel. It is characterized by.

  As a result, the self-supporting auxiliary member has both a compression resistance and a tension resistance function, so that the multiple cable can be supported while accommodating the compressive stress and the tensile stress generated in the multiple cable when the movable part moves. Even if the cable is not housed in the cable carrier, the vertical movement of the multiple cable during movement of the movable part can be suppressed almost completely. Furthermore, since the self-supporting auxiliary member is integrated with the cable, it does not rub, and the cable bear is not necessary, so that the problem generated by the cable bear is solved.

  The compression-resistant member and the tensile-resistant member are formed in a cable shape, and the central axis of the compression-resistant member is positioned on the tensile stress generation side of the multiple cable when the movable part moves. The tension-resistant members are arranged in parallel so that the central axes thereof are located on a line passing through the central axes of the multiple cable.

  When the movable part is stationary, the multiple cable from the movable part to the U-shaped folded part hangs down due to its own weight, causing compressive stress on the upper side of the cable and tensile stress on the lower side of the cable. When the movable part is in a moving state, the multiple cables in the U-shaped folded part are subjected to compressive stress on the cable inner side (cable lower side) and tensile stress on the cable outer side (cable upper side). Therefore, since the compression resistant member is located on the upper side of the cable when the movable part is stationary, the multiple cable can be prevented from sagging due to its own weight, and when the movable part is moved, it is located on the outer side of the cable (upper side of the cable). The continuous cable can be smoothly folded back into a U shape. Further, since the tension-resistant member is always in parallel with the multiple cable even when the movable part is stationary and the movable part is moved, the compression-resistant member prevents the sagging due to the weight of the multiple cable, and there are many compression-resistant members. It is possible to assist when the continuous cable is smoothly folded back into a U-shape, and the vertical fluctuation of the multiple cable during movement of the movable part can be suppressed almost completely.

Further, the self-supporting auxiliary members are arranged in parallel on both sides of the multiple cable, and are integrated.
Thereby, since the self-supporting auxiliary member supports the multiple cable from both sides, the above action can be exhibited more effectively.

  Hereinafter, embodiments of the self-supporting cable according to the present invention will be described. The embodiments described below do not limit the invention according to the scope of claims, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. Absent.

  FIG. 1A is a plan view showing a first embodiment of a self-supporting cable according to the present invention, and FIG. 1B is a cross-sectional view taken along the line AA. The self-supporting cable 1 includes six cable units 10 arranged in parallel, fused and integrated to form a multiple cable 11, and two cable units 10 formed on the cable units 10 on both sides of the multiple cable 11. This is a self-supporting flat cable in which the self-supporting auxiliary members 20 are arranged in parallel and fused and integrated. That is, the self-supporting cable 1 has a configuration in which the multiple cable 11 is sandwiched and supported by two self-supporting auxiliary members 20. Then, the lower end shown in FIG. 1A of the self-standing cable 1 is placed on the movable part 61 arranged in the upper part shown in FIG. 2 so that the lower surface of FIG. 1B is inside the U-shaped folded part C. The upper end of the self-standing cable 1 shown in FIG. 1A is bent into a U shape and connected to the fixed portion 62 that is connected and arranged at the lower part shown in FIG.

  The cable unit 10 is a cable for a signal line or electric power line in which a plurality of coaxial cables or the like are bundled in a cylindrical bundle and a sheath made of plastic is extruded and covered. The cable unit 10 and the cable of the hydraulic and pneumatic power lines are arranged in parallel and fused to be integrated, and the self-supporting auxiliary member 20 is arranged in parallel to the cable units 10 and the like on both sides and fused and integrated. It is good also as a type compound flat cable. Moreover, the parallel number of the cable units 10 and the like and the self-supporting auxiliary member 20 may be an arbitrary number.

  The self-supporting auxiliary member 20 includes a compression-resistant member 21 and a tensile-resistant member 22 that are arranged in parallel and fused and integrated. The compression resistant member 21 is a member that has a high elastic modulus when compressed in the cable length direction and a low elastic coefficient when pulled in the cable length direction. That is, it is a member that is not easily deformed by a compressive stress in the cable length direction and is easily deformed by a tensile stress in the cable length direction. The tension member 22 is a member having a high elastic modulus when pulled in the cable length direction. That is, it is a member that is not easily deformed by a tensile stress in the cable length direction.

  The compression resistant member 21 is positioned outside the multiple cable 11 bent in a U shape, and the tensile resistant member 22 is arranged in the same row as the multiple cable 11 bent in a U shape. Yes. That is, the compression resistant member 21 is arranged so that the central shaft 21a is positioned on the tensile stress generation side of the multiple cable 11 when the movable portion 61 (see FIG. 2) is moved. It arrange | positions so that it may be located on the line L which passes each center axis | shaft 10a of the cable unit 10. FIG. By positioning the central axis 22a of the tensile member 22 on the line L passing through each central axis 10a of the cable unit 10, an unnecessary load is not applied to the multiple cable 11, and thus disconnection of the multiple cable 11 is prevented. be able to.

  As the compression resistant member 21, for example, a member in which a resin-made outer skin is integrated with a metal close coil spring is used. If it is a close-contact coil spring, it is difficult to deform because there is no gap between the windings with respect to the compressive stress in the longitudinal direction, and it is easily deformed by the spring action with respect to the tensile stress in the longitudinal direction. For example, a stainless steel wire is wound. The outer skin can be fused to the close coil spring and can be fused to the sheath of the cable unit 10, and the cross-sectional shape and the relative position in the axial direction are fixed, that is, the tight coil spring and the cable unit 10 are maintained in an integrated state. Any material can be used, and for example, it can be produced by extruding polyvinyl chloride (PVC). Note that soft resin such as urethane, rubber or the like can be used instead of PVC.

  As the tension-resistant member 22, for example, a member in which a resin outer skin is integrated with a metal wire rope is used. If it is a wire rope, it has a large breaking force with respect to the tensile stress in the longitudinal direction and is not easily deformed. Therefore, it can be configured as a tension-resistant member 22, for example, a resin wire is used as a core and a stainless wire is twisted. It is produced together. The outer skin can be fused to the wire rope and can be fused to the sheath of the cable unit 10 to fix the sectional shape and the relative position in the axial direction, that is, the wire rope and the cable unit 10 can be maintained in an integrated state. Any material may be used, and for example, it is produced by extruding PVC. Instead of the wire rope, a resin rope made of aramid fiber or the like having a large breaking force can be used. Also, a soft resin such as urethane or rubber can be used instead of PVC.

  Here, in the multiple cable 11 that does not have the self-supporting auxiliary member 20, when the movable part 61 is in a stationary state, the multiple cable 11 from the movable part 61 to the U-shaped folded part hangs down by its own weight and is on the upper side of the cable. Compressive stress occurs, and tensile stress occurs below the cable. When the movable portion 61 is in a moving state, the multiple cable 11 in the U-shaped folded portion has a compressive stress on the cable inner side (the cable lower side) and a tensile stress on the cable outer side (the cable upper side).

  However, in the self-supporting cable 1 of the present embodiment, the compression resistant member 21 is located on the upper side of the cable when the movable portion 61 is stationary, so that it can withstand the generated compressive stress and prevent the multiple cable 11 from sagging due to its own weight. can do. In addition, since the movable portion 61 is located outside the cable (on the upper side of the cable) when moving, the multiple cable 11 can be smoothly folded back into a U shape by extending due to the generated tensile stress.

  Furthermore, since the tension-resistant member 22 is in parallel with the multiple cable 11 when the movable portion 61 is stationary, it can withstand the generated tensile stress and prevent the multiple cable 11 from sagging due to its own weight. Further, while the movable portion 61 is moved, it is in parallel with the multiple cable 11, but the tension-resistant member 22 is excellent in flexibility and can follow the multiple cable 11. It can be folded back smoothly into a letter shape.

  That is, since the tension-resistant member 22 is always in parallel with the multiple cable 11 even when the movable part 61 is stationary and when the movable part 61 is moved, the compression-resistant member 21 is caused by the weight of the multiple cable 11 as described above. When preventing drooping and when the compression resistant member 21 smoothly folds the multiple cable 11 into a U shape, it can assist. In particular, since the self-supporting auxiliary member 20 is arranged in parallel on both sides of the multiple cable 11 and integrated to support the multiple cable 11 from both sides, the above action can be exhibited more effectively. .

  As described above, since the self-supporting auxiliary member 20 has both a compression resistance and a tension resistance function, the multiple cable 11 can be accommodated while accommodating the compressive stress and the tensile stress generated in the multiple cable 11 when the movable portion 61 is moved. Even if the multiple cable 11 is not housed in the cable carrier, the vertical fluctuation of the multiple cable 11 when the movable portion 61 is moved can be suppressed almost completely. Furthermore, since the self-supporting auxiliary member 20 is integrated with the multiple cable 11 and is not rubbed, the cable bear is not necessary, so that the above-described problem of the cable bear is solved. The self-supporting cable 1 has a configuration in which a multiple cable 11 in which a plurality of cable units 10 are integrated and a self-supporting auxiliary member 20 in which a compression-resistant member 21 and a tensile-resistant member 22 are integrated are further integrated. Therefore, when the sheath of the cable unit 10 and the outer skin of the compression resistant member 21 and the tensile resistant member 22 are made of the same material, for example, extrusion can be performed at once and cost reduction can be achieved.

Next, the self-supporting cable of this embodiment and a conventional multiple cable in which six cable units are arranged in parallel and fused and integrated for comparison, and the self-supporting auxiliary member is not fused. Was incorporated into a moving test apparatus, and a repeated movement test was conducted.
FIG. 2 is a plan view showing the movement test apparatus. The movement test apparatus 60 includes a movable part 61 and a fixed part 62 that are arranged vertically at predetermined intervals. The movable portion 61 is configured to reciprocate in the direction of arrow a along the horizontal moving surface 63. The fixed part 62 is fixed on a reference surface 64 parallel to the moving surface 63. Then, one end side of a self-standing cable 1A, 1B, 1C or multiple cable 9 described later is connected to the movable portion 61, the other end side is folded back in a U shape, and the tip end portion is connected to the fixed portion 62.

The moving repetition test of the moving test apparatus 60 was performed under the following conditions.
Stroke of movable part 61: 900 mm, 1000 mm, 1500 mm
Movement speed of movable part 61: 1500 mm / sec
Movement speed arrival time of movable part 61: 50 ms
Distance between movable part 61 (moving surface 63) and fixed part 62 (reference surface 64): 250 mm
The self-supporting cables 1A, 1B, and 1C that are examples of the present embodiment incorporated in the mobile test apparatus 60 and the cable 9 that is a conventional comparative example will be described below.

[Example]
Three 6-unit flat cables were produced by arranging and fusing three types of cable units 10A, 10B, and 10C in parallel in the order of 10C, 10B, 10A, 10A, 10B, and 10C. In addition, three types of compression-resistant members 21A, 21B, and 21C and one type of tensile-resistant member 22 were arranged in parallel, fused, and integrated to produce three types of self-supporting auxiliary members 20A, 20B, and 20C. Then, three types of self-supporting cables are arranged by fusing and integrating three types of self-supporting auxiliary members 20A, 20B, and 20C to the cable units 10C and 10C on both sides of the three six-flat cables. 1A, 1B and 1C were produced. The cable lengths of the cable units 10A, 10B, and 10C are 1250 mm, and the cable weight is 803 g / m.

  The configuration of the cable unit 10A will be described. 1. A conductor made of tinned annealed copper wire (AWG17) is twisted and covered with an insulator of ethylene-tetrafluoroethylene copolymer (ETFE) around an outer diameter of 1.66 mm. The core cable body is formed by twisting four of these simple wires. A tape (thickness 0.1 mm) made of polytetrafluoroethylene (PTFE) is wound around the core cable body and cotton yarn as a pressing tape. Further, a tin-plated tin-containing copper alloy is wound around the pressing tape. A shield layer is formed by winding an element wire to have an outer diameter of 5.9 mm, and a sheath made of polyvinyl chloride (PVC) is extruded and coated around the shield layer to form an outer diameter of 8.0 mm as a whole. A cable unit 10A was produced.

  The configuration of the cable unit 10B will be described. Outer diameter formed by coating an insulator of ethylene-tetrafluoroethylene copolymer (ETFE) around a conductor twisted with a conductor wire (AWG25) made of tinned annealed copper wire to an outer diameter of 0.58 mm Two simple wires of 0.98 mm are twisted to form a two-stranded electric wire having a stranded outer diameter of 1.96 mm, and four pairs of the two-stranded wires are twisted to form a core cable body. A tape (thickness 0.1 mm) made of polytetrafluoroethylene (PTFE) is wound around the core cable body and cotton yarn as a pressing tape. Further, a tin-plated tin-containing copper alloy is wound around the pressing tape. A shield layer is formed by winding an element wire to an outer diameter of 5.1 mm, and a sheath made of polyvinyl chloride (PVC) is extruded and coated around the shield layer, and the outer diameter is 8.0 mm as a whole. A cable unit 10B was produced.

  The configuration of the cable unit 10C will be described. A conductor wire (AWG25) made of a tinned annealed copper wire is twisted to coat a conductor having an outer diameter of 0.58 mm, and an insulator of ethylene-tetrafluoroethylene copolymer (ETFE) is covered with an outer diameter of 0. The core cable body is formed by twisting 14 simple wires around the interposition of cotton yarn. A tape (thickness 0.1 mm) made of porous polytetrafluoroethylene (EPTFE) is wound around the core cable body as a pressing tape, and further, polyvinyl chloride (PVC) is wound around the pressing tape. The sheath was extrusion coated to produce a cable unit 10C having an outer diameter of 8.0 mm as a whole.

  The compression resistant member 21A of the first type of self-standing cable 1A is formed by fusion-bonding an outer skin made of polyvinyl chloride (PVC) to a stainless steel close spring having an outer diameter of 6.0 mm and a wire diameter of 1.0 mm. It was made by integrating. The compression resistant member 21B of the second type of self-standing cable 1B is formed by fusion-bonding an outer skin made of polyvinyl chloride (PVC) to a stainless steel close spring having an outer diameter of 7.0 mm and a wire diameter of 1.0 mm. It was made by integrating. The compression resistant member 21C of the third type of self-standing cable 1C is formed by fusion-bonding an outer skin made of polyvinyl chloride (PVC) to a stainless steel close spring having an outer diameter of 8.0 mm and a wire diameter of 1.0 mm. It was made by integrating. The tension-resistant member 22 of the self-supporting cable 1A is manufactured by fusing and integrating a sheath made of polyvinyl chloride (PVC) onto a wire rope made of stainless steel wire and nylon (registered trademark) fiber. did.

[Comparative example]
Three 6-unit flat cables were produced by arranging and fusing three types of cable units 10A, 10B, and 10C in parallel in the order of 10C, 10B, 10A, 10A, 10B, and 10C.

  FIG. 3 is a diagram showing the results of the moving repetition test. The test results are as follows. The self-supporting type of the embodiment at the midway position when the movable portion 61 moves from the left end to the right end in FIG. 2 (positions of 300 mm, 400 mm, and 500 mm in the left direction in the drawing with the rightmost end position of the movable portion 61 as a base point). The maximum amount of bending downward from the reference surface 63 of the cables 1A, 1B, 1C and the cable 9 of the comparative example is shown for each stroke (900 mm, 1000 mm, 1500 mm) of the movable portion 61.

  As is clear from FIG. 3, when the stroke of the movable portion 61 is 900 mm, the maximum deflection amount reaches 100 mm, 90 mm, and 70 mm in the middle of movement in the cable 9 of the comparative example. On the other hand, in the self-supporting cables 1A, 1B, and 1C of the examples, the maximum deflection amount is 0 mm, 0 mm, and 0 mm in the middle of movement. Thus, when the stroke of the movable part 61 is 900 mm, the vertical fluctuation of the self-supporting cables 1A, 1B, 1C can be substantially suppressed without being influenced by the outer diameter of the contact spring of the compression resistant member 21A.

  Further, when the stroke of the movable part 61 was 1000 mm, the cable 9 of the comparative example was largely bent and could not be moved, and measurement was impossible. On the other hand, in the self-supporting cable 1A of the example, the maximum deflection amount during the movement is as good as 0 mm, 5 mm, and 10 mm. Moreover, in the self-supporting cables 1B and 1C of the examples, the maximum deflection amount is 0 mm, 0 mm, and 0 mm in the middle of movement, which is the best. Thus, when the stroke of the movable part 61 is 1000 mm, when the outer diameter of the close contact spring of the compression resistant member 21A is a predetermined value (6 mm), the vertical fluctuation of the self-standing cable 1A can be substantially suppressed, Furthermore, when the outer diameters of the contact springs of the compression resistant members 21B and 21C are larger than a predetermined value (7 mm or more), the vertical fluctuation of the self-standing cables 1B and 1C can be completely suppressed.

  Further, when the stroke of the movable portion 61 was 1500 mm, the cable 9 of the comparative example was bent greatly and could not be moved, and measurement was impossible. On the other hand, in the self-supporting cables 1A and 1B of the example, the maximum deflection amount during the movement is as good as 0 mm, 5 mm, and 10 mm. Further, in the self-standing cable 1C of the example, the maximum deflection amount is 0 mm, 0 mm, and 0 mm in the middle of movement, which is the best. As described above, when the stroke of the movable portion 61 is 1500 mm, when the outer diameter of the contact springs of the compression resistant members 21A and 21B is smaller than a predetermined value (7 mm or less), the vertical fluctuations of the self-standing cables 1A and 1B are substantially reduced. Further, when the outer diameter of the contact spring of the compression resistant member 21C is a predetermined value (8 mm), the vertical fluctuation of the self-standing cable 1C can be completely suppressed.

  The scope of the present invention is not limited to the above-described embodiments and examples, and can be applied to various other embodiments as long as they do not contradict the description of the claims. For example, in the above embodiment, in FIG. 2, 61 is a movable part and 62 is a fixed part, but 61 is a fixed part and 62 is a movable part, 61 and 62 are movable parts, or It goes without saying that the present invention can also be applied to a case where the configuration is set by rotating it at an arbitrary angle clockwise or counterclockwise, for example, in the vertical direction. Moreover, in the said embodiment, although the self-supporting auxiliary member 20 was provided in the cable unit 10 of the both sides of the multiple cable 11, you may provide between the cable units 10. FIG. Moreover, although the self-supporting cable 1 of each embodiment mentioned above was made into the flat type, it is not limited to this, Even if it is a cable of a cylindrical type etc., it is applicable.

  The self-supporting cable according to the present invention can be applied to, for example, a robot traveling apparatus incorporated in a machining line, a semiconductor manufacturing apparatus, an electronic component mounting apparatus, or the like.

It is the top view and AA sectional view taken on the line which show embodiment of the self-supporting cable which concerns on this invention. It is a top view which shows a movement test apparatus. It is a figure which shows the result of a movement repetition test.

Explanation of symbols

  1, 1A, 1B, 1C Self-standing cable, 10 Cable unit, 11 Multiple cable, 20, 20A, 20B, 20C Self-supporting auxiliary member, 60 Moving test device, 61 Moving part, 62 Fixed part, 63 Moving surface, 64 Reference surface

Claims (3)

A multiple cable in which a plurality of cables are arranged in parallel is integrated, and one end side and the other end side of the multiple cable are respectively connected to a movable part that is reciprocally moved and a fixed part that is arranged vertically. A free-standing cable,
A compression-resistant member that is not easily deformed with respect to a compressive stress in the cable length direction and that is easily deformed with respect to a tensile stress in the cable length direction; and a tension-resistant member that is not easily deformed with respect to the tensile stress in the cable length direction. A self-supporting cable, wherein self-supporting auxiliary members arranged in parallel and integrated with each other are arranged in parallel with the multiple cable. The compression-resistant member and the tensile-resistant member are formed in a cable shape, and the central axis of the compression-resistant member is positioned on the tensile stress generation side of the multiple cable when the movable part moves. 2. The self-supporting cable according to claim 1, wherein the tension-resistant members are arranged in parallel so that the central axes of the tensile members are located on a line passing through the central axes of the multiple cables. The self-supporting cable according to claim 1 or 2, wherein the self-supporting auxiliary members are arranged in parallel on both sides of the multiple cable and integrated.

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