Method for manufacturing multi-core cable assembly, apparatus for manufacturing multi-core cable assembly, and twisting machine

Abstract

To provide a manufacturing method and a manufacturing device of a multi-core cable assembly, and a stranding machine, which do not increase difficulty of connection work between an electrode of a substrate and a core wire of an insulated wire due to a bending habit of the insulated wire caused by untwisting, even when an extra fine insulated wire is used.SOLUTION: The method of manufacturing the multi-core cable assembly 1 includes a stripping step of exposing the core wire 31 at one end of the plurality of insulated wires 3, a connecting step of connecting the core wire 31 to the electrode 20 of the substrate 2, and a stranding step of helically stranding the plurality of insulated wires 3. The stranding machine 4 includes the rotating body 400 in which the plurality of suction pipes 44 are arranged, the plurality of cores 43 fixed to the other end portions of the plurality of insulated wires 3, respectively, and the pump 47 that the plurality of cores 43 arranged in the plurality of suction pipes 44, respectively, and rotates the rotating body 400 while sucking the plurality of cores 43 in the plurality of suction pipes 44 by the pump 47.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a method and an apparatus for manufacturing a multi-core cable assembly, and a wire twisting machine. [Background technology]

[0002] Conventionally, some medical devices, such as endoscopes, that are inserted into the human body include a plurality of insulated wires twisted together in a spiral shape and a substrate to which the plurality of insulated wires are connected. When manufacturing such a medical device, the plurality of insulated wires twisted together in a spiral shape are partially untwisted, and the insulating coating at the tip of each insulated wire is removed to expose the core wire, and the exposed core wire is connected to an electrode on the substrate by, for example, soldering.

[0003] Furthermore, in order to achieve minimally invasive procedures that reduce the burden on patients undergoing medical procedures such as examinations and treatments, such medical devices may use extremely thin insulated wires, for example, with a core conductor diameter of 0.1 mm or less. When manufacturing medical devices using such extremely thin insulated wires, if multiple insulated wires are untwisted, the twisting tendency created when the wires are twisted can cause the tips of the insulated wires to become bent, making it difficult to connect them to electrodes on the circuit board.

[0004] To solve this problem, the present applicant has proposed a multi-core cable assembly as described in Patent Document 1. In this multi-core cable assembly, each of the multiple insulated wires is plastically stretched in the longitudinal direction at an elongation rate of 0.5% to 10.0%, thereby reducing the tendency of the insulated wires to bend and improving the workability of terminal processing. The elongation rate of the insulated wires can be adjusted, for example, by increasing or decreasing the rotational resistance of the wire-drawing wheel in the wire twisting machine. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2024-025296 Summary of the Invention [Problem to be solved by the invention]

[0006] The multi-core cable assembly described in Patent Document 1 can reduce the tendency of insulated electric wires to bend, but in order to plastically stretch each of the multiple insulated electric wires at a predetermined elongation rate, it is necessary to adjust the tension during twisting in a twisting machine, for example, and manufacturing is difficult with equipment that does not have such an adjustment function. Also, depending on the thickness of the insulated electric wires and the pitch of the multiple electrodes on the board, even a slight tendency of the insulated electric wires to bend can make it more difficult to connect the core wires of the insulated electric wires to the electrodes.

[0007] Therefore, an object of the present invention is to provide a method and an apparatus for manufacturing a multi-core cable assembly that can prevent the difficulty of connecting the electrodes of a circuit board to the cores of the insulated wires due to the tendency of the insulated wires to bend when untwisting them, even when using ultra-fine insulated wires.Another object of the present invention is to provide a wire twisting machine that can be suitably used in the manufacturing method of the multi-core cable assembly. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems, the present invention provides a method for manufacturing a multi-core cable assembly in which one ends of a plurality of insulated wires twisted together in a spiral shape are connected to a plurality of electrodes on a substrate, the method comprising: a stripping process for removing the insulating coatings on the one ends of the plurality of insulated wires to expose the core wires; a connecting process for connecting the core wires at the one ends of the plurality of insulated wires to the electrodes on the substrate after the stripping process; and a twisting process for twisting the plurality of insulated wires in a spiral shape after the connecting process.

[0009] Furthermore, in order to solve the above-mentioned problems, the present invention provides a manufacturing apparatus for manufacturing a multi-core cable assembly in which one ends of a plurality of insulated wires twisted together in a spiral shape are connected to a plurality of electrodes of a substrate, the manufacturing apparatus comprising: a substrate holding section that holds the substrate in which one ends of the plurality of insulated wires are connected to the plurality of electrodes, respectively; a rotating body in which a plurality of tubular bodies are arranged in a circumferential direction centered on a rotation axis; a plurality of attracted members fixed to the other ends of the plurality of insulated wires, respectively; and a pump that attracts each of the plurality of attracted members, wherein, with the plurality of attracted members disposed inside each of the plurality of tubular bodies, the rotating body is rotated while the pump attracts each of the plurality of attracted members, thereby twisting the plurality of insulated wires together.

[0010] Furthermore, in order to solve the above-mentioned problems, the present invention provides a wire twisting machine comprising a rotating body on which a plurality of tubular bodies are arranged in a circumferential direction centered on a rotation axis, a plurality of attracted members fixed to the other ends of the plurality of insulated electric wires, and a pump that attracts each of the plurality of attracted members, wherein, with the plurality of attracted members arranged inside each of the plurality of tubular bodies, the rotating body is rotated while the pump attracts each of the plurality of attracted members, thereby twisting the plurality of insulated electric wires into a spiral shape. [Effects of the Invention]

[0011] The manufacturing method and apparatus for a multi-core cable assembly according to the present invention can prevent the difficulty of connecting the electrodes of the circuit board to the cores of the insulated wires due to the tendency of the insulated wires to bend when untwisting them. Also, the twisting machine according to the present invention can prevent the insulated wires from being twisted when twisting multiple insulated wires together. [Brief explanation of the drawings]

[0012] [Figure 1]1A is a diagram showing an example of the configuration of a multi-core cable assembly according to an embodiment of the present invention, FIG. 1B is a cross-sectional view taken along line AA in FIG. 1A, and FIG. 1C is a cross-sectional view of one insulated wire. [Figure 2] 10A and 10B are explanatory views showing a substrate and a plurality of insulated wires in a connecting step. [Figure 3] FIG. 2 is a diagram showing a schematic configuration example of a wire twisting machine used in a wire twisting process. [Figure 4] FIG. 2 is a configuration diagram showing a planetary gear mechanism as viewed from the axial direction. [Figure 5] 1(a) is an explanatory view showing a core housed inside a suction pipe together with an insulated electric wire, with a portion of the suction pipe cut away, and FIG. 1(b) is a cross-sectional view taken along the axial direction of the core. DETAILED DESCRIPTION OF THE INVENTION

[0013] [Embodiment Mode] Fig. 1(a) is a diagram showing an example of the configuration of a multi-core cable assembly 1 according to an embodiment of the present invention. Fig. 1(b) is a cross-sectional view taken along line AA in Fig. 1(a). Fig. 1(c) is a cross-sectional view of one insulated wire 3. This multi-core cable assembly 1 is used, for example, as a component of a medical device such as an endoscope that is inserted into the human body.

[0014] The multi-core cable assembly 1 includes a substrate 2 on which a plurality of electronic components 21 are mounted, and a cable 10. The cable 10 includes a plurality of insulated wires 3. In the present embodiment, as an example, the cable 10 includes a bind tape 11 wound around the outer periphery of the plurality of insulated wires 3, a shield conductor 12 provided around the outer periphery of the bind tape 11, and a tubular sheath 13 provided around the outer periphery of the shield conductor 12. The plurality of insulated wires 3 are twisted together to form a cable core 30.

[0015] The sheath 13 is made of, for example, a fluororesin, and collectively covers the multiple insulated wires 3 together with the bind tape 11 and the shield conductor 12. In FIG. 1(a), the outline of the sheath 13 is shown by a two-dot chain line in a portion of the longitudinal direction of the cable 10, showing the appearance of the cable core 30. The multiple insulated wires 3 are twisted together inside the sheath 13, thereby improving the flexibility of the cable 10. Note that, depending on the flexibility and noise resistance required of the cable 10, one or both of the bind tape 11 and the shield conductor 12 may be omitted. Also, the cable 10 may not have a sheath 13.

[0016] In this embodiment, the cable 10 has ten insulated wires 3. Of the multiple insulated wires 3, some of the insulated wires 3 are used to supply power to multiple electronic components 21, and the other insulated wires 3 are used to transmit signals. In this embodiment, the ten insulated wires 3 have the same thickness and material. However, this is not limiting, and for example, the insulated wires 3 for power supply may be thicker than the insulated wires 3 for signal transmission.

[0017] The substrate 2 is provided with electrodes 20, the same number as the insulated wires 3. The electrodes 20 are pads formed by etching a conductive metal foil such as copper foil, but may also be pads formed by sputtering a conductive metal. In this embodiment, the substrate 2 is rectangular, and ten electrodes 20 are formed in a row at one end of the substrate 2 along its long side. The substrate 2 is a flexible substrate having a film-like substrate made of a dielectric material such as polyimide, but may also be a solid substrate having a hard plate-like substrate such as glass epoxy. Wiring patterns extending from each of the multiple electrodes 20 are formed on the surface of the substrate 2, but are not shown in FIG. 1( a). The number and functions of the electronic components 21 mounted on the substrate 2 vary depending on the application of the multi-core cable assembly 1.

[0018] As shown in Fig. 1(c), each insulated wire 3 has a core wire 31 made of a metal with good electrical conductivity and an insulating coating 32 that covers the core wire 31. The core wire 31 is a solid wire with a circular cross section, and is made of, for example, copper or a copper alloy, or aluminum or an aluminum alloy. The conductor diameter D of the core wire 31 is 31 The thickness is, for example, 100 μm or less, and more specifically, 30 μm to 50 μm. The insulating coating 32 is an insulator made of a resin such as polyurethane, polyester, polyesterimide, polyamideimide, or polyimide.

[0019] One longitudinal end of each of the multiple insulated wires 3 is connected to each of the multiple electrodes 20 on the substrate 2. At the portion where the insulated wire 3 is connected to the electrode 20 on the substrate 2, the insulating coating 32 is removed to expose the core wire 31. The core wire 31 is connected to the electrode 20 by, for example, soldering, but is not limited to this. For example, the core wire 31 may be connected to the electrode 20 by a conductive adhesive, or the core wire 31 may be connected to the electrode 20 by welding.

[0020] Here, if the insulated wires 3 are undulated when connecting the core wires 31 of the multiple insulated wires 3 to the electrode 20 during the manufacture of the multi-core cable assembly 1, the connection work to the electrode 20 becomes more difficult, and the work time increases, resulting in an increase in manufacturing costs. The undulation of the insulated wires 3 occurs, for example, when the multiple insulated wires 3 are twisted together in a spiral shape and then untwisted. This is because the twist tendency created when twisting remains in the insulated wires 3. The undulation caused by the twist tendency can occur, for example, when the conductor diameter D 31 This becomes particularly large in the case of an extremely thin insulated electric wire 3 having a diameter of 100 μm or less.

[0021] In a conventional method for manufacturing a multi-core cable assembly, a cable core is formed by twisting together multiple insulated wires, and the cable core is then cut to a predetermined length. After that, the multiple insulated wires are untwisted at the end of the cable core and connected to an electrode on a substrate. In contrast, in this embodiment, multiple insulated wires 3 are connected to a substrate 2 and then twisted together.

[0022] That is, in this embodiment, the multi-core cable assembly 1 is manufactured by a manufacturing method including a stripping step of removing the insulating coating 32 from one end of the multiple insulated wires 3 to expose the core wires 31, a connecting step of connecting the core wires 31 at one end of the multiple insulated wires 3 to the electrodes 20 of the substrate 2 after the stripping step, and a twisting step of twisting the multiple insulated wires 3 together in a spiral shape after the connecting step. This allows the insulated wires 3 to be connected without any twisting tendency, improving work efficiency.

[0023] FIG. 2 is an explanatory diagram showing a substrate 2 and multiple insulated wires 3 in a connecting step. In the connecting step, the core wires 31 of multiple insulated wires 3 are connected to multiple electrodes 20 of the substrate 2, on which multiple electronic components 21 are mounted. FIG. 2 shows a state in which the core wires 31 of five of the ten insulated wires 3 are connected to the electrodes 20. By connecting the core wires 31 of the insulated wires 3 to the electrodes 20 of the substrate 2 before twisting the multiple insulated wires 3 into a spiral, the connecting work can be performed efficiently while the insulated wires 3 are free of twisting tendencies and are nearly straight. Furthermore, in conventional manufacturing methods, in order to connect a winding insulated wire to an electrode on the substrate, this connecting work had to be performed manually by an operator, for example, under a microscope or a magnifying glass. However, in the present embodiment, the connecting work can be performed without twisting tendencies in the insulated wires 3, making it possible to mechanize and automatically perform the connecting work.

[0024] 3 is a schematic diagram illustrating an example of the configuration of a wire twisting machine 4 used in the wire twisting process. The wire twisting machine 4 includes a slide table 41 as a substrate holder for holding the substrate 2, a moving mechanism 42 for moving the slide table 41, a plurality of cores 43 as sucked members fixed to the other ends of a plurality of insulated electric wires 3, each of which has one end connected to the substrate 2, a plurality of suction pipes 44 as tubular bodies for accommodating the cores 43, a support plate 45 for supporting the suction pipes 44, a first motor 46 for rotating the support plate 45, a pump 47 for sucking air from the suction pipes 44 and sucking the cores 43 in a direction away from the substrate 2, a planetary gear mechanism 48 axially aligned with the support plate 45, a second motor 49 for rotating a sun gear 481 of the planetary gear mechanism 48, and a control device 40 for controlling the first motor 46 and the second motor 49. In FIG. 3, the cores 43 arranged inside the suction pipes 44 are indicated by dashed lines.

[0025] The slide table 41 holds the substrate 2 in the connecting step, where one ends of the multiple insulated wires 3 are connected to the multiple electrodes 20, respectively. The slide table 41 has a mounting base 411 on which the substrate 2 to be connected to the multiple insulated wires 3 is placed, a fixing member 412 for fixing the substrate 2 to the mounting base 411, and a die 413 having formed therein die holes through which the multiple insulated wires 3 are inserted. The die 413 has the function of bundling the multiple insulated wires 3 extending from the substrate 2 into a bundle, and is fixed to the mounting base 411 and moves together with the substrate 2.

[0026] The movement mechanism 42 includes a guide rail 421 that guides the movement of the slide table 41, a movement motor 422, a ball screw shaft 423 that is rotated by the movement motor 422, a ball screw nut 424 that is threaded onto the ball screw shaft 423 via a plurality of balls, and an attachment member 425 that attaches the ball screw nut 424 to the slide table 41. The movement motor 422 is controlled by the control device 40 in synchronization with the first motor 46 and the second motor 49. When the ball screw shaft 423 is rotated by the movement motor 422, the slide table 41 moves along the guide rail 421. The guide rail 421 extends parallel to a rotation axis O of a rotating body 400, which will be described later. In FIG. 3, the movement direction of the slide table 41 in the wire twisting process is indicated by an arrow A1.

[0027] The configuration of the moving mechanism 42 is not limited to that illustrated in Figure 3, and as long as it can move the substrate 2 parallel to the rotation axis O, it may be one that moves the slide table 41 by belt drive, or one that moves independently together with the slide table 41.

[0028] The wire twisting machine 4 has a plurality of support plates 45, and the rotational force of a first motor 46 is transmitted to the plurality of support plates 45 via a shaft 461 and a plurality of pinion gears 462. A gear portion 451 is provided on the outer periphery of the support plate 45, and the gear portion 451 is meshed with the pinion gear 462. Each pinion gear 462 rotates integrally with the shaft 461, causing the plurality of support plates 45 to rotate at a uniform speed around a common rotation axis O.

[0029] The multiple suction pipes 44 are arranged at equal intervals around the circumferential direction of the support plate 45 centered on the rotation axis O, extend parallel to the rotation axis O, and are supported by the support plate 45 via multiple bearings 452 held by the support plate 45. The two support plates 45, the multiple bearings 452, and the multiple suction pipes 44 form a rotor 400 that rotates the multiple cores 43 around the rotation axis O. In the twisting process, the multiple insulated electric wires 3 are twisted together by rotating the cores 43 through the rotation of the rotor 400. In FIG. 3 , the rotation direction of the rotor 400 in the twisting process is indicated by arrow A2.

[0030] 3, the wire twisting machine 4 has two support plates 45. However, the support plates 45 may be installed at appropriate intervals according to the length of the insulated wires 3 to be twisted, and the number of support plates 45 constituting the rotor 400 is not limited to two, and may be one, or three or more.

[0031] 4 is a configuration diagram showing the planetary gear mechanism 48 as viewed in the axial direction. The planetary gear mechanism 48 has a sun gear 481 that rotates about a rotation axis O, and a plurality of planetary gears 482 that mesh with the sun gear 481. A plurality of suction pipes 44 are fixed to the plurality of planetary gears 482, respectively. Each suction pipe 44 passes through the planetary gear 482 in the axial direction parallel to the rotation axis O. A shaft 491 that transmits the rotational force of the second motor 49 to the sun gear 481 is fixed to the center of the sun gear 481.

[0032] The control device 40 controls the rotation speeds of the first motor 46 and the second motor 49 so that the rotational position of each planetary gear 482 as viewed from the axial direction does not change even when each planetary gear 482 rotates around the rotation axis O together with the suction pipe 44. As a result, in the wire twisting process, the multiple planetary gears 482 revolve without rotating. Here, rotation means that each planetary gear 482 rotates around its own central axis C, and revolution means that each planetary gear 482 rotates around the rotation axis O of the sun gear 481.

[0033] In Figure 4, the up-down direction of the drawing corresponds to the vertical direction of the wire stranding machine 4, and a black circle (●) is attached to the gear tooth 482a of the planetary gear 482 that is located at the uppermost vertical position among the multiple gear teeth of the planetary gear 482. During the wire stranding process, the multiple planetary gears 482 revolve without rotating, so that each planetary gear 482 revolves around the rotation axis O while maintaining the gear tooth 482a marked with a black circle at the uppermost vertical position. This prevents the suction pipe 44 fixed to each planetary gear 482 from rotating around the central axis C, thereby preventing twisting of the multiple insulated electric wires 3. Here, twisting refers to the twisting that occurs around the center of a single insulated electric wire 3.

[0034] That is, the twisting process is a process of twisting a plurality of insulated wires 3 together while suppressing twisting of each of the insulated wires 3. By suppressing twisting of the insulated wires 3, it is possible to prevent breakage of the insulated wires 3 caused by twisting of the insulated wires 3 and unwinding (untwisting) of the twisted plurality of insulated wires 3.

[0035] FIG. 5(a) is an explanatory diagram showing the core 43 housed inside the suction pipe 44 together with the insulated wire 3, with a portion of the suction pipe 44 cut away. FIG. 5(b) is a cross-sectional view taken along the axial direction of the core 43. The core 43 is cylindrical, and an axial hole 430 is formed in the center along the axial direction. The end of the insulated wire 3 opposite the substrate 2 is housed in the axial hole 430, and the insulated wire 3 is prevented from coming out of the axial hole 430 by a conical retaining member 431 pressed into the axial hole 430 together with the insulated wire 3. The outer diameter of the core 43 is smaller than the inner diameter of the suction pipe 44. Note that the fixing structure for fixing the insulated wire 3 to the core 43 is not limited to the examples shown in FIGS. 5(a) and 5(b), and various structures can be used.

[0036] The core 43 is movable in the axial direction within the suction pipe 44, and moves within the suction pipe 44 toward the end on the substrate 2 side as the twisting of the multiple insulated electric wires 3 progresses in the twisting process. In the twisting process, the multiple insulated electric wires 3 are twisted together by rotating the rotor 400 while the core 43 is sucked by the pump 47 inside each of the multiple suction pipes 44. In FIG. 5(a), the direction in which the pump 47 sucks the core 43 is indicated by arrow A3. The direction in which the core 43 moves within the suction pipe 44 in the twisting process is opposite to the direction in which the pump 47 sucks the core 43.

[0037] In this embodiment, the same number of pumps 47 as the number of insulated wires 3 are attached to the end of each suction pipe 44. However, this is not limiting, and the cores 43 in the multiple suction pipes 44 may be sucked by a single pump or by a number of pumps fewer than the number of suction pipes 44. A driving current is supplied to each pump 47 via a slip ring using, for example, a brush. By using the pump 47 to suck the cores 43 in the suction pipe 44, a constant tension can be applied to the multiple insulated wires 3 in the stranding process, regardless of the position of the cores 43 in the suction pipe 44.

[0038] In the wire twisting process, the slide table 41 is moved away from the rotor 400 while rotating the rotor 400 and the sun gear 481 and the plurality of planetary gears 482 of the planetary gear mechanism 48, thereby twisting the plurality of insulated wires 3 drawn out from the plurality of suction pipes 44 into a spiral shape. In FIG. 1, the portion where the plurality of insulated wires 3 are twisted together is indicated by the reference symbol 3A. The portion 3A where the plurality of insulated wires 3 are twisted together is on an extension of the rotation axis O of the rotor 400. When the insulated wires 3 are drawn out from the suction pipe 44 and the core 43 reaches the end of the suction pipe 44, the wire twisting process is completed.

[0039] Thereafter, a bind tape 11 is wound around the cable core 30 in which the insulated wires 3 are twisted together in a spiral shape, a shield conductor 12 is placed over it, and a sheath 13 is extruded to form the multi-core cable assembly 1 shown in Fig. 1. The twist strength (twist pitch) of the multiple insulated wires 3 in the cable core 30 can be adjusted by the moving speed of the slide table 41; the faster the moving speed of the slide table 41, the longer the twist pitch.

[0040] In the present embodiment, a case has been described in which the plurality of insulated wires 3 are twisted together by moving the slide table 41 holding the substrate 2 relative to the rotating body 400. However, the present invention is not limited to this. The position of the substrate 2 may be fixed, and the rotating body 400 may be moved in a direction parallel to the rotation axis O and away from the substrate 2. In other words, as long as the substrate 2 to which the plurality of insulated wires 3 are connected and the rotating body 400 can be moved relative to each other along the rotation axis O, the plurality of insulated wires 3 can be twisted together by rotating the rotating body 400.

[0041] 4, the suction pipe 44 has a circular cross section and the core 43 is cylindrical, but for example, the cross section of the suction pipe 44 and at least a part of the cross section of the core 43 may be non-circular so that the core 43 does not rotate relative to the suction pipe 44. In other words, the core 43 may be movable in the axial direction but not rotate relative to the suction pipe 44.

[0042] (Actions and Effects of the Embodiments) According to the embodiment described above, it is possible to prevent the difficulty of connecting the electrodes 20 on the substrate 2 to the core wires 31 of the insulated wires 3 from increasing due to bending tendencies of the insulated wires 3. Furthermore, according to the wire twisting machine 4 of this embodiment, it is possible to twist the insulated wires 3 together after connecting the insulated wires 3 to the substrate 2, and it is possible to prevent the insulated wires 3 from being twisted when twisting the insulated wires 3 together.

[0043] (Summary of the embodiment) Next, the technical ideas grasped from the above-described embodiments will be described by using the reference numerals and the like in the embodiments. However, the reference numerals in the following description do not limit the components in the claims to the members and the like specifically shown in the embodiments.

[0044] [1] A method for manufacturing a multi-core cable assembly (1), in which one ends of a plurality of insulated electric wires (3) twisted together in a spiral are connected to a plurality of electrodes (20) on a substrate (2), the method comprising: a stripping process for removing insulating coatings (32) from the one ends of the plurality of insulated electric wires (3) to expose core wires (31); a connecting process for connecting the core wires (31) at the one ends of the plurality of insulated electric wires (3) to the electrodes (20) on the substrate (2) after the stripping process; and a twisting process for twisting the plurality of insulated electric wires (3) in a spiral after the connecting process.

[0045] [2] The method for manufacturing the multi-core cable assembly (1) described in [1] above, wherein the twisting step is a step of twisting the plurality of insulated wires (3) together while suppressing twisting of each of the plurality of insulated wires (3).

[0046] [3] The method for manufacturing the multi-core cable assembly (1) described in [1] or [2] above, wherein the twisting step is a step of twisting the insulated wires (3) by using a rotating body (400) having a plurality of tubular bodies (suction pipes 44) arranged in a circumferential direction around a rotation axis (O) and rotating the rotating body (400) while sucking a plurality of attracted members (cores 43) fixed to the other ends of the insulated wires (3) inside the tubular bodies (44).

[0047] [4] A manufacturing apparatus (wire twisting machine 4) for manufacturing a multi-core cable assembly (1) in which one ends of a plurality of insulated electric wires (3) twisted together in a spiral are connected to a plurality of electrodes (20) of a substrate (2), the manufacturing apparatus comprising: a substrate holding unit (slide table 41) for holding the substrate (2) in which one ends of the plurality of insulated electric wires (3) are connected to the plurality of electrodes (20), a rotating body (400) in which a plurality of tubular bodies (44) are arranged in a circumferential direction around a rotation axis (O); and a plurality of the insulated electric wires (3). a plurality of attracted members (43) fixed to the other end of each of the plurality of tubular bodies (44), and a pump (47) that attracts each of the plurality of attracted members (43), and the apparatus (4) twists together the plurality of insulated wires (3) by rotating the rotating body (400) while attracting each of the plurality of attracted members (43) with the pump (47) while the plurality of attracted members (43) are arranged inside each of the plurality of tubular bodies (44).

[0048] [5] A twisting machine (4) comprising: a rotating body (400) on which a plurality of tubular bodies (44) are arranged in a circumferential direction around a rotation axis (O); a plurality of attracted members (43) fixed to the other ends of the plurality of insulated electric wires (3); and a pump (47) that attracts each of the plurality of attracted members (43), wherein, with the plurality of attracted members (43) arranged inside the plurality of tubular bodies (44), the rotating body (400) is rotated while the pump (47) attracts each of the plurality of attracted members (43), thereby twisting the plurality of insulated electric wires (3) into a spiral.

[0049] Although the embodiments of the present invention have been described above, the invention according to the claims is not limited to these embodiments. It should be noted that not all of the combinations of features described in the embodiments are necessarily essential to solving the problems of the invention. Furthermore, the multi-core cable assembly manufactured by the manufacturing method or manufacturing apparatus according to the present invention can be used in a variety of products, not just medical devices. [Explanation of symbols]

[0050] 1... Multi-core cable assembly 2... Board 20...electrode 3...insulated wire 31...Core wire 32...Insulating coating 4...Twisting machine 400...Rotating body 41... Slide table (substrate holding portion) 42... Moving mechanism 43... Core (suctioned member) 44... Suction pipe (tubular body) 47...Pump O...Rotation axis

Claims

1. A method for manufacturing a multi-core cable assembly in which one ends of a plurality of insulated electric wires twisted together in a spiral shape are connected to a plurality of electrodes of a substrate, the method comprising: a stripping process for removing the insulating coating from the one end of the plurality of insulated wires to expose core wires; a connecting step of connecting the core wires at the one ends of the plurality of insulated electric wires to the electrodes of the substrate after the stripping step; a twisting step of twisting the plurality of insulated wires together in a spiral shape after the connecting step; A method for manufacturing a multi-core cable assembly having the following components:

2. The stranding step is a step of stranding the plurality of insulated wires together while suppressing twisting of each of the plurality of insulated wires. The method for manufacturing the multi-conductor cable assembly of claim 1 .

3. The twisting step is a step of twisting the insulated electric wires by using a rotor having a plurality of tubular bodies arranged in a circumferential direction around a rotation axis, and rotating the rotor while attracting a plurality of attracted members fixed to the other ends of the insulated electric wires inside the plurality of tubular bodies. A method for manufacturing the multi-core cable assembly according to claim 1 or 2.

4. 1. A manufacturing apparatus for manufacturing a multi-core cable assembly in which one ends of a plurality of insulated electric wires twisted together in a spiral are connected to a plurality of electrodes of a substrate, the manufacturing apparatus comprising: the substrate holder holding the substrate, the one ends of the plurality of insulated electric wires being connected to the plurality of electrodes, respectively; a rotating body having a plurality of tubular bodies arranged in a circumferential direction about a rotation axis; a plurality of attracted members fixed to the other ends of the plurality of insulated electric wires, respectively; and a pump sucking each of the plurality of attracted members, With the plurality of attracted members disposed inside the plurality of tubular bodies, the plurality of attracted members are respectively sucked by the pump while the rotating body is rotated, thereby twisting the plurality of insulated electric wires together. Multi-core cable assembly manufacturing equipment.

5. a rotating body having a plurality of tubular bodies arranged in a circumferential direction around a rotation axis; a plurality of attracted members fixed to the other ends of the plurality of insulated electric wires; and a pump that attracts each of the attracted members; With the plurality of attracted members disposed inside the plurality of tubular bodies, the plurality of attracted members are respectively sucked by the pump while the rotating body is rotated, thereby twisting the plurality of insulated electric wires into a spiral shape. Stranding machine.

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