Twist-off device for multi-core cable

Abstract

A twist-off device (1) of a multi-core cable includes a holding jig (11) that holds a non-front end portion (5B) of a jacket of a multi-core cable (3), a front end holding jig (26) that holds a front end portion (5A) of the jacket, an intermediate holding jig (61) that holds a wire exposed from the jacket between the holding jig (11) and the front end holding jig (26), and a rotating device (40) that rotates the front end holding jig (26). Thus, since the intermediate holding jig (61) can hold the wire exposed from the jacket at a position close to the front end holding jig (26), the wire can be well twisted off.

Description

Technical Field

[0001] This invention relates to a de-twisting device for multi-core cables that corrects the twisting pattern of the wires in multi-core cables. Background Technology

[0002] Conventional multi-core cables, consisting of multiple wires and a sheath covering these wires, are known. For multi-core cables, a process involves forming a cut at the front end of the sheath and then pulling out the front end of the sheath to expose the front ends of each wire. Then, for example, a process is performed to crimp terminals to the front ends of each wire. However, if twisted strands remain on the wires when the front end of the sheath is pulled out, subsequent processing of the wires cannot be performed effectively. Therefore, devices for removing the twists from the wires have been proposed in the past.

[0003] Patent Document 1 discloses a de-twisting device that simultaneously untwistes the wire and pulls out the front end of the sheath. This de-twisting device includes a holding member, a gripping member, a pulling-out device, and a rotating device. The holding member holds the non-front end of the sheath. The gripping member grips the front end of the sheath. The pulling-out device moves the gripping member away from the holding member. The rotating device rotates the front end of the sheath held by the gripping member relative to the holding member. By fixing the wire with the holding member while rotating the front end of the sheath with the rotating device, the wire is twisted using the gripping member. This corrects the twisted shape of the wire. Simultaneously, by moving the gripping member using the pulling-out device, the front end of the sheath can be pulled out. In other words, this de-twisting device twists the wire while simultaneously pulling out the front end of the sheath.

[0004] Existing technical documents Patent documents Patent Document 1: International Publication No. 2022 / 091788 Summary of the Invention

[0005] (a) Technical problems to be solved According to the untwisting device disclosed in Patent Document 1, as the front end of the sheath is pulled out, the holding member moves away from the retaining member. If the holding member is far from the retaining member, the positions for fixing the wire using the retaining member and for twisting the wire using the holding member become further apart. Therefore, the rotational force on the holding member side of the wire twisting is difficult to transmit to the retaining member side of the wire. Consequently, when the retaining member is far from the holding member, the wire cannot be untwisted effectively.

[0006] The present invention was made in view of the above-mentioned problems, and its object is to provide a de-twisting device for multi-core cables that can effectively de-twistwist the wires even when the holding part and the holding part are far apart.

[0007] (II) Technical Solution The de-twisting device for multi-core cables of the present invention corrects the twisting pattern of the wires in a multi-core cable having multiple wires and a sheath covering the wires. The de-twisting device comprises: a holding clamp that holds a non-front end of the sheath of the multi-core cable; a front end gripping clamp that grips the front end of the wires exposed from the sheath or the front end of the sheath; at least one intermediate gripping clamp that grips the wires between the holding clamp and the front end gripping clamp; and a rotating device that rotates the front end gripping clamp.

[0008] If the retaining clamp is far from the front-end gripping clamp, the position where the retaining clamp holds the wire is far from the position where the front-end gripping clamp twists the wire. The rotational force used to twist the wire at the front-end gripping clamp side is difficult to transmit to the wire's retaining component side, sometimes resulting in poor wire untwisting. With the above structure, an intermediate gripping clamp can hold the wire at a position between the retaining clamp and the front-end gripping clamp. Because the wire can be held close to the front-end gripping clamp, it is possible to effectively untwist the wire even when the retaining clamp is far from the front-end gripping clamp.

[0009] According to a preferred embodiment, the untwisting device for the multi-core cable further includes a pulling device that moves the front-end holding clamp away from the holding clamp along the axial direction of the multi-core cable.

[0010] The aforementioned method allows the front-end gripper to move, enabling the wire to be twisted in various positions and effectively untwisted. Furthermore, it allows for simultaneous untwisting of the wire and removal of the sheath's front end.

[0011] According to a preferred embodiment, in the untwisting device for the multi-core cable, a plurality of intermediate gripping clamps are provided along the length direction of the multi-core cable.

[0012] According to the above method, multiple intermediate gripping clamps can be used to hold the wire at multiple positions. This makes it more difficult for the rotational force of the twisting wire to escape, allowing for effective untwisting of the wire. Furthermore, by using appropriate intermediate gripping clamps based on the position of the front gripping clamp, the wire can be effectively untwisted.

[0013] According to a preferred embodiment, the untwisting device for the multi-core cable further includes an intermediate gripping and moving device, which moves the intermediate gripping clamp in the axial direction of the multi-core cable.

[0014] Using the method described above, the positional relationship between the retaining clamp, the intermediate gripping clamp, and the front gripping clamp can be adjusted. Therefore, the wire can be untwisted with optimal positioning, ensuring efficient wire untwisting.

[0015] According to a preferred embodiment, the intermediate gripping clamp has rollers for abutting the wire.

[0016] According to the above method, by moving the intermediate gripping clamp while holding the wire with the intermediate gripping clamp, the posture of the wire that is scattered during untwisting can be corrected.

[0017] According to a preferred embodiment, the roller is configured to be rotatable.

[0018] According to the above method, when the intermediate gripping clamp is moved while holding the wire using the intermediate gripping clamp, the load on the wire can be reduced.

[0019] According to a preferred embodiment, the untwisting device for the multi-core cable includes: an intermediate gripping and moving device that moves the intermediate gripping clamp axially along the multi-core cable; and a control device that controls the pull-out device and the intermediate gripping and moving device. The control device performs the following controls: moving the front gripping clamp away from the holding clamp; and, while the cable is being held by the intermediate gripping clamp, moving the intermediate gripping clamp away from the holding clamp.

[0020] As the front gripper moves away from the holding gripper, and further away from both the holding gripper and the intermediate gripper, it may become difficult to properly untwist the wire. However, according to the method described above, even if the front gripper moves, the intermediate gripper can be moved without moving away from the front gripper. This prevents the distance between the front gripper and the intermediate gripper from increasing, thus ensuring proper wire untwisting.

[0021] According to a preferred embodiment, the untwisting device for the multi-core cable includes: an intermediate gripping and moving device that moves the intermediate gripping clamp axially in the multi-core cable; and a control device that controls the pulling device and the intermediate gripping and moving device. After the front end of the sheath is pulled out from the wire by moving the front gripping clamp away from the holding clamp, the control device moves the intermediate gripping clamp away from the holding clamp while the wire is being held by the intermediate gripping clamp.

[0022] According to the above method, after pulling out the front end of the sheath, the intermediate clamp is moved while holding the wire with the intermediate clamp. This corrects the posture of the wire that has become tangled during untwisting.

[0023] According to a preferred embodiment, in the untwisting device for the multi-core cable, a plurality of intermediate gripping clamps are provided along the length direction of the multi-core cable, and a control device is provided. The control device controls the pulling device and the intermediate gripping clamps. The control device moves the front gripping clamp away from the holding clamp, and sequentially causes the plurality of intermediate gripping clamps to grip the wire, starting from the intermediate gripping clamp closest to the holding clamp.

[0024] According to the above method, as the distance between the retaining clamp and the front gripping clamp increases, multiple intermediate gripping clamps can be used to sequentially hold the wire. This allows for effective untwisting of the wire.

[0025] (III) Beneficial Effects According to the present invention, a de-twisting device for multi-core cables can be provided that can effectively de-twist the wires even when the front gripping clamp and the holding clamp are far apart. Attached Figure Description

[0026] Figure 1 This is a perspective view of a de-twisting device for a multi-core cable according to one embodiment.

[0027] Figure 2 (a) is a top view of a multi-core cable. Figure 2 (b) is a top view showing the internal multi-core cable at the front end.

[0028] Figure 3 This is the main view of the retaining fixture.

[0029] Figure 4 This is a side view of the front-end gripping clamp and rotating device.

[0030] Figure 5 This is the front view of the front-end gripping fixture and rotating device.

[0031] Figure 6 This is the front view of the central gripping fixture.

[0032] Figure 7 This is a block diagram of the control device.

[0033] Figure 8 This is a perspective view of a multi-core cable untwisting device that uses a front-end gripper to hold the front end of the sheath.

[0034] Figure 9 It is a three-dimensional diagram of a multi-core cable untwisting device that untwises the core wires and anti-twisting wires while pulling the front end of the sheath out a specified distance.

[0035] Figure 10 This is a three-dimensional diagram of a multi-core cable untwisting device that uses an intermediate gripping clamp to hold the core wire and the untangled wire.

[0036] Figure 11 This is a three-dimensional diagram of the untwisting device for a multi-core cable when the intermediate gripper moves backward. Detailed Implementation

[0037] Hereinafter, a de-twisting device for a multi-core cable according to an embodiment of the present invention will be described with reference to the accompanying drawings. In the following description, the de-twisting device for the multi-core cable will be simply referred to as a de-twisting device. Figure 1 This is a perspective view of the un-twist device of this embodiment. Figure 2 (a) is a top view of the multi-core cable 3. Figure 2 (b) is a top view showing the interior of the front end of the multi-core cable 3.

[0038] like Figure 2 (a) and Figure 2 As shown in (b), the multi-core cable 3 has multiple covered wires 4, one uncovered wire 6, and a sheath 5 covering these wires 4 and 6. The wire 6 has multiple wires made of a conductor such as metal, which are not shown in the diagram. The wire 4 has multiple wires made of a conductor such as metal and a sheath layer made of an insulator such as synthetic resin covering these wires. Hereinafter, the covered wire 4 and the uncovered wire 6 will be referred to as the core wire and the stripper wire, respectively. In this case, the multi-core cable 3 has four core wires 4. However, the number of core wires 4 is not particularly limited. Similarly, the number of stripper wires 6 is not particularly limited. The material of the sheath 5 is not particularly limited; for example, it can be neoprene, vinyl chloride, polyethylene, etc.

[0039] like Figure 2 As shown in (a), a slit (also called a slot) 5C is pre-formed on the sheath 5 of the multi-core cable 3 processed by the untwisting device 1. The sheath 5 is cut by the slit 5C into a front end (hereinafter referred to as the sheath front end) 5A and a non-front end 5B. Figure 2 As shown in (b), the core wire 4 and the stripper wire 6 are twisted in the sheath 5. That is, the core wire 4 and the stripper wire 6 inside the sheath 5 extend in a spiral shape and have a twisted shape. The untwisting device 1 pulls out the front end 5A of the sheath and corrects the twisted shape of the exposed core wire 4 and the stripper wire 6.

[0040] like Figure 1As shown, the untwisting device 1 includes: a holding device 10 for holding the non-front end 5B of the sheath 5 of the multi-core cable 3; a front end holding device 20 for holding the front end 5A of the sheath; an intermediate holding device 60 for holding the core wire 4 and the stripper wire 6 between the holding device 10 and the front end holding device 20; a pulling out device 30 for pulling out the front end 5A of the sheath; a rotating device 40 for rotating the front end 5A of the sheath; and an intermediate holding moving device 70 for moving the intermediate holding device 60. Furthermore, the untwisting device 1 includes a control device 80 (see reference) for controlling the operation of the holding device 10, the front end holding device 20, the intermediate holding device 60, the pulling out device 30, and the rotating device 40. Figure 7 In the following description, for convenience, the front end 5A side of the sheath 5 will be referred to as the rear side, and the non-front end 5B side will be referred to as the front side. Assume that the front end 5A of the sheath is pulled out rearward.

[0041] Figure 3 This is a view of the retaining device 10 from the rear. The retaining device 10 includes: a retaining clamp 11 having a pair of left and right clamping jaws 11L and 11R; and a first actuator 12 that drives the clamping jaws 11L and 11R to move closer or further apart. The first actuator 12 is not particularly limited and is here constructed as a cylinder. If the clamping jaws 11L and 11R are brought closer together, the retaining clamp 11 closes. As a result, the non-front end portion 5B of the sheath 5 is held by the clamping jaws 11L and 11R. Here, the retaining clamp 11 holds the non-front end portion 5B of the sheath 5 at a predetermined distance (e.g., 10 mm) from the slit 5C of the sheath 5. If the clamping jaws 11L and 11R are moved further apart, the retaining clamp 11 opens. As a result, the holding of the non-front end portion 5B of the sheath 5 is released.

[0042] like Figure 1 As shown, the front-end gripping device 20 includes a front-end gripping clamp 26 and a second actuator 25 for opening and closing the front-end gripping clamp 26.

[0043] like Figure 4 and Figure 5 As shown, the front-end gripping clamp 26 has a first clamping claw 21 and a second clamping claw 22. The first clamping claw 21 and the second clamping claw 22 are positioned opposite each other in a manner that enables them to grip the front end portion 5A of the sheath. Here, each of the first clamping claws 21 has a plurality of triangular plate members 21a arranged in the front-rear direction. Similarly, each of the second clamping claws 22 has a plurality of triangular plate members 22a arranged in the front-rear direction. The plate members 21a and 22a are arranged alternately in the front-rear direction. Furthermore, the structure of the first clamping claw 21 and the second clamping claw 22 described here is merely an example. The structure of the first clamping claw 21 and the second clamping claw 22 is not particularly limited as long as it can grip the front end portion 5A of the sheath.

[0044] If the first clamping claw 21 and the second clamping claw 22 approach each other, the front end 5A of the sheath is clamped by the first clamping claw 21 and the second clamping claw 22. Thus, the front end 5A of the sheath is held by the first clamping claw 21 and the second clamping claw 22. If the first clamping claw 21 and the second clamping claw 22 move away from each other, the holding of the front end 5A of the sheath is released.

[0045] like Figure 4 As shown, the front-end gripping clamp 26 has a linkage mechanism 23 that connects to the first clamping jaw 21 and the second clamping jaw 22. Additionally, as... Figure 1 As shown, the front-end gripping clamp 26 includes a piston rod 24 connected to the linkage mechanism 23. The piston rod 24 is connected to the second actuator 25. The second actuator 25 is not particularly limited and is here constructed as a cylinder. The piston rod 24 is movable back and forth and is rotatably connected to the second actuator 25. If the second actuator 25 moves the piston rod 24 forward, the first clamping jaw 21 and the second clamping jaw 22 separate from each other. That is, if the piston rod 24 extends forward, the front-end gripping clamp 26 opens, and the gripping action performed by the front-end gripping clamp 26 is released. On the other hand, if the second actuator 25 moves the piston rod 24 backward, the first clamping jaw 21 and the second clamping jaw 22 approach each other. That is, if the piston rod 24 retracts, the front-end gripping clamp 26 closes, and the front-end gripping clamp 26 grips the front end 5A of the sheath.

[0046] like Figure 1 As shown, the rotating device 40 includes a support plate 43 that supports the front end gripping clamp 26 so that it can rotate, and a second motor 41 that applies a rotational force to the front end gripping clamp 26. The second motor 41 is supported on the support plate 43. Figure 4 As shown, the rotating shaft 41a of the second motor 41 is connected to the front gripping clamp 26 via a belt 42. The belt 42 is a transmission component that transmits power from the second motor 41 to the front gripping clamp 26. However, the transmission component is not limited to the belt 42; it can also be a gear, chain, or other type of transmission component. Furthermore, while the second motor 41 is an example of an actuator that imparts rotational force to the front gripping clamp 26, the actuator that imparts rotational force to the front gripping clamp 26 is not limited to the second motor 41. In this embodiment, the rotating device 40 is configured to rotate the front end portion 5A of the sheath by rotating the front gripping clamp 26.

[0047] The pull-out device 30 is configured to pull out the front end 5A of the sheath by moving the front-end gripping clamp 26 away from the holding clamp 11 along the length direction of the multi-core cable 3. Figure 1As shown, the extraction device 30 includes a movable platform 31 supporting the front-end gripping device 20 and the rotating device 40, a first motor 32 that moves the movable platform 31 forward and backward, and a fixed platform 35 supporting the movable platform 31 and the first motor 32. A guide rail 36 extending forward and backward is provided on the fixed platform 35. A slider 37 that slidably engages with the guide rail 36 is fixed to the lower part of the movable platform 31. A ball screw 33 is connected to the first motor 32. A slider 34 that engages with the ball screw 33 is fixed to the front part of the movable platform 31. A hole (not shown) for the ball screw 33 to be inserted is formed in the slider 34. A helical groove that engages with the ball screw 33 is formed on the inner circumferential surface of the hole. If the first motor 32 rotates in one direction, the ball screw 33 rotates in the same direction, and the slider 34 moves forward. As a result, the front-end gripping clamp 26 moves forward. If the first motor 32 rotates in the opposite direction, the ball screw 33 also rotates in the opposite direction, and the slider 34 moves backward. As a result, the front gripping clamp 26 moves backward. Thus, by rotating the first motor 32 in one direction or the opposite direction, the front gripping clamp 26 moves forward or backward. However, the structure of the extraction device 30 is not limited to this.

[0048] like Figure 1 As shown, the intermediate gripping device 60 is positioned between the retaining device 10 and the front gripping device 20. The intermediate gripping device 60 grips the core wire 4 and the detangling wire 6 exposed when the sheath 5 is pulled out. Figure 6 As shown, the intermediate gripping device 60 includes an intermediate gripping clamp 61 and a third actuator 62. The intermediate gripping clamp 61 is a component that grips the exposed core wire 4 and the deflector wire 6. The intermediate gripping clamps 61 are arranged in a pair, left and right. A cylindrical roller 61a is provided at the front end of the intermediate gripping clamp 61. In this embodiment, a total of 8 rollers 61a are provided, but the number of rollers 61a is not particularly limited. The rollers 61a are configured to rotate about an axis extending in the vertical direction. By abutting the rollers 61a against the exposed core wire 4 and the deflector wire 6, the intermediate gripping clamp 61 grips the exposed core wire 4 and the deflector wire 6. The intermediate gripping clamp 61 can, for example, grip the front end of the core wire 4 and the deflector wire 6 (the part covered by the front end 5A of the sheath). (Refer to...) Figure 2 (a) and Figure 2 (b) The middle part can also hold the core wire 4 and the part of the anti-scratching wire 6 that is closer to the root than the middle part. Figure 2 (b) The left side of the part), can also hold the part that is closer to the front end than the middle part ( Figure 2 (the part to the right of (b)).

[0049] The third actuator 62 drives the pair of left and right intermediate gripping clamps 61 to move closer or further apart. The third actuator 62 is located at the lower part of the intermediate gripping clamps 61. The third actuator 62 is not particularly limited, but in this embodiment it is a cylinder. When the pair of left and right intermediate gripping clamps 61 are brought closer together, the intermediate gripping clamps 61 close, and the roller 61a abuts against the exposed core wire 4 and the deflector wire 6. As a result, the exposed core wire 4 and the deflector wire 6 can be gripped. When the pair of left and right intermediate gripping clamps 61 are moved further apart, the intermediate gripping clamps 61 open. As a result, the gripping of the exposed core wire 4 and the deflector wire 6 is released.

[0050] The intermediate grip moving device 70 is a device that moves the intermediate grip device 60 in the front-rear direction. The intermediate grip device 60 is connected to the fixed platform 35 of the pull-out device 30 via the intermediate grip moving device 70. The intermediate grip moving device 70 includes a sliding member 71, a track 72, and a fourth actuator 73. The intermediate grip device 60 is fixed to the sliding member 71. The sliding member 71 is slidably engaged with the track 72. The track 72 extends in the front-rear direction. The fourth actuator 73 is not particularly limited, but in this embodiment it is a cylinder. The fourth actuator 73 is connected to the sliding member 71. The fourth actuator 73 moves the sliding member 71 in the front-rear direction. By driving the fourth actuator 73, the sliding member 71 moves along the track 72 in the front-rear direction. The intermediate grip device 60 is connected to the sliding member 71, so the intermediate grip device 60 can be moved in the front-rear direction by the fourth actuator 73.

[0051] Figure 7 This is a block diagram of the control device 80. The control device 80 is electrically connected to the first actuator 12 of the holding device 10, the second actuator 25 of the front gripping device 20, the first motor 32 of the pull-out device 30, the second motor 41 of the rotating device 40, the third actuator 62 of the intermediate gripping device 60, and the fourth actuator 73 of the intermediate gripping movement device 70. The control device 80 controls the operation of the unwinding device 1 by controlling the operation of these actuators. The control device 80 may be, for example, a microcomputer. The control device 80 includes a pull-out control unit 81, a rotation control unit 82, a holding control unit 83, a front gripping control unit 84, an intermediate gripping control unit 85, and an intermediate gripping movement control unit 86. The control device 80 may also include processing units other than these, but detailed descriptions are omitted here.

[0052] The pull-out control unit 81 controls the first motor 32 of the pull-out device 30 to pull out the front end 5A of the sheath. The rotation control unit 82 controls the second motor 41 of the rotation device 40 to rotate the front end gripping clamp 26. The holding control unit 83 controls the first actuator 12 of the holding device 10 to hold or release the non-front end 5B of the sheath 5. The front end gripping control unit 84 controls the second actuator 25 of the front end gripping device 20 to hold or release the gripping of the front end 5A of the sheath. The intermediate gripping control unit 85 controls the third actuator 62 of the intermediate gripping device 60 to hold or release the gripping of the core wire 4 and the detangling wire 6. The intermediate gripping movement control unit 86 controls the fourth actuator 73 of the intermediate gripping movement device 70 to move the intermediate gripping device 60 in the front-back direction.

[0053] The above describes the structure of the un-twist device 1 according to this embodiment. Next, referring to... Figures 8-11 The method for pulling out the front end 5A of the sheath using the untwisting device 1 and the untwisting method for the core wire 4 and the anti-twisting wire 6 are described. In this embodiment, the pulling out of the front end 5A of the sheath and the untwisting of the core wire 4 and the anti-twisting wire 6 are performed simultaneously.

[0054] First, such as Figure 8 As shown, the untwisting device 1 uses the holding device 10 to hold the non-front end 5B of the sheath 5 of the multi-core cable 3, and the front end gripping device 20 to hold the front end 5A of the sheath of the multi-core cable 3. Here, the holding control unit 83 of the control device 80 actuates the first actuator 12 of the holding device 10, thereby holding the non-front end 5B of the sheath 5 of the multi-core cable 3 by the holding device 10. In addition, the front end gripping control unit 84 of the control device 80 actuates the second actuator 25 of the front end gripping device 20, thereby holding the front end gripping device 20 to hold the front end 5A of the sheath of the multi-core cable 3.

[0055] Thus, while holding the non-front end 5B of the sheath 5 of the multi-core cable 3 and grasping the front end 5A of the sheath 3, the pull-out control unit 81 of the control device 80 actuates the first motor 32 of the pull-out device 30. Figure 9 As shown, the pull-out control unit 81 moves the front end gripping clamp 26 rearward. This causes the front end portion 5A of the sheath to also move rearward, and the front end portion 5A of the sheath is pulled out. Simultaneously, the front end gripping clamp 26 is rotated by the rotating device 40. Here, the rotating device 40 rotates the front end gripping clamp 26 in the opposite direction to the twisting direction of the core wire 4 and the stripper wire 6. Furthermore, the twisting direction of the core wire 4 and the stripper wire 6 is known beforehand. Therefore, the twisting pattern of the core wire 4 and the stripper wire 6 can be corrected.

[0056] If the control unit 81 pulls out the front end 5A of the sheath, the distance between the retaining clamp 11 and the front holding clamp 26 increases accordingly. That is, the position of the multi-core cable 3 held by the retaining clamp 11 and the position of the multi-core cable 3 held by the front holding clamp 26 increase. Therefore, even if the front holding clamp 26 is rotated by the rotating device 40, it is sometimes impossible to properly correct the twisted shape of the core wire 4 and the untangled wire 6. Therefore, in this embodiment, if... Figure 10 As shown, when the front end 5A of the sheath is pulled out a specified distance (e.g., 50 mm), the intermediate gripping device 60 grips the core wire 4 and the detangling wire 6. Here, the intermediate gripping control unit 85 of the control device 80 actuates the third actuator 62 of the intermediate gripping device 60, thereby causing the intermediate gripping device 60 to grip the core wire 4 and the detangling wire 6.

[0057] With the multi-core cable 3 held by the retaining clamp 11, the front-end gripping clamp 26, and the intermediate gripping clamp 61, the pull-out control unit 81 of the control device 80 moves the front-end gripping clamp 26 backward, and the rotation control unit 82 rotates the front-end gripping clamp 26 in the opposite direction to the twisting direction of the core wire 4 and the unwrap wire 6. At this time, the core wire 4 and the unwrap wire 6 are held by the intermediate gripping clamp 61 at a position closer to the front-end gripping clamp 26 than the position held by the retaining clamp 11. As a result, the rotational force exerted by the rotation device 40 on the core wire 4 and the unwrap wire 6 is difficult to escape. Therefore, the twisting pattern of the core wire 4 and the unwrap wire 6 can be effectively corrected.

[0058] like Figure 11 As shown, if the pull-out device 30 completely pulls out the front end 5A of the sheath, the intermediate gripping movement control unit 86 of the control device 80 actuates the fourth actuator 73 of the intermediate gripping movement device 70, causing the intermediate gripping device 60 to move rearward until the intermediate gripping clamp 61 passes the front end of the core wire 4 and the detangling wire 6. At this time, the roller 61a rotates while sliding relative to the core wire 4 and the detangling wire 6. As a result, the posture of the core wire 4 and the detangling wire 6, which have become scattered due to bending or other factors during untwisting, can be corrected.

[0059] According to this embodiment, the untwisting device 1 includes a retaining clamp 11 that holds the non-front end 5B of the sheath 5, a front end gripping clamp 26 that holds the front end 5A of the sheath, an intermediate gripping clamp 61 that holds the exposed core wire 4 and the unwound wire 6 between the retaining clamp 11 and the front end gripping clamp 26, and a rotating device 40 that rotates the front end gripping clamp 26. Thus, the intermediate gripping clamp 61 can hold the core wire 4 and the unwound wire 6 at a position close to the front end gripping clamp 26. Therefore, even if the retaining clamp 11 is far from the front end gripping clamp 26, the core wire 4 and the unwound wire 6 can be effectively untwisted.

[0060] According to this embodiment, the untwisting device 1 includes a pulling device 30 that moves the front end gripping clamp 26 axially along the multi-core cable 3. This allows the front end gripping clamp 26 to move, thus enabling the core wire 4 and the untwisted wire 6 to be twisted in various positions, effectively untwisting the core wire 4 and the untwisted wire 6. Furthermore, the pulling out of the sheath front end 5A and the untwisting of the core wire 4 and the untwisting wire 6 can be performed simultaneously.

[0061] According to this embodiment, the untwisting device 1 includes an intermediate gripping movement device 70 that moves the intermediate gripping clamp 61 axially along the multi-core cable 3. This allows for adjustment of the positional relationship between the holding clamp 11, the intermediate gripping clamp 61, and the front gripping clamp 26. The core wire 4 and the stripper wire 6 can be untwisted in an optimal positional relationship, ensuring efficient untwisting of the core wire 4 and the stripper wire 6.

[0062] According to this embodiment, the intermediate gripping clamp 61 has a roller 61a for abutting the core wire 4 and the detangling wire 6. By moving the intermediate gripping clamp 61 with the roller 61a abutting the core wire 4 and the detangling wire 6, the posture of the core wire 4 and the detangling wire 6 that are scattered during untwisting can be corrected.

[0063] According to this embodiment, the roller 61a is configured to rotate. Therefore, when the intermediate gripping clamp 61 is moved while the roller 61a is in contact with the core wire 4 and the deflection wire 6, the load on the core wire 4 and the deflection wire 6 can be reduced.

[0064] According to this embodiment, after the control device 80 pulls the front end portion 5A of the sheath from the core wire 4 and the unwound wire 6 by moving the front end gripping clamp 26 away from the holding clamp 11, it moves the intermediate gripping clamp 61 away from the holding clamp 11 while holding the core wire 4 and the unwound wire 6. After the front end portion 5A of the sheath is completely pulled out, the intermediate gripping clamp 61 moves forward while holding the core wire 4 and the unwound wire 6, thereby correcting the posture of the core wire 4 and the unwound wire 6, which have become tangled due to bending or other reasons during untwisting, to be straight.

[0065] The above description describes a torsion relief device 1 according to one embodiment of the present invention, but this embodiment is merely an example. Various other embodiments are also possible.

[0066] In the above embodiment, the number of intermediate gripping devices 60 is one, but the number of intermediate gripping devices 60 is not particularly limited. Two or more intermediate gripping devices 60 may also be arranged along the length of the multi-core cable 3. Therefore, multiple intermediate gripping clamps 61 can be used to grip the core wire 4 and the unwrapped wire 6 at multiple positions. This makes it more difficult for the rotational force of the core wire 4 and the unwrapped wire 6 to escape, and allows for effective untwisting of the core wire 4 and the unwrapped wire 6. Furthermore, when untwisting while moving the front gripping clamp 26 backward as in the above embodiment, as the distance between the holding clamp 11 and the front gripping clamp 26 increases, multiple intermediate gripping clamps 61 can be used to sequentially grip the core wire 4 and the unwrapped wire 6. This allows for effective untwisting of the core wire 4 and the unwrapped wire 6. Moreover, by pre-positioning the untwisting portion as held by the intermediate gripping clamps 61, it is possible to prevent the core wire 4 and the unwrapped wire 6 from becoming disoriented.

[0067] In the above embodiment, after the front end 5A of the sheath is completely pulled out, the intermediate gripping device 60 is moved using the intermediate gripping movement device 70. However, the intermediate gripping device 60 can also be moved rearward before the front end 5A of the sheath is completely pulled out. For example, the untwisting device 1 can also be configured such that when the front gripping clamp 26 and the intermediate gripping clamp 61 are separated by a predetermined distance (e.g., 40 mm) or more, the intermediate gripping movement control unit 86 of the control device 80 moves the intermediate gripping device 60 rearward. This can prevent the distance between the front gripping clamp 26 and the intermediate gripping clamp 61 from increasing. As a result, the core wire 4 and the untwisted wire 6 can be untwisted effectively.

[0068] In the above embodiment, the sheath front end 5A is pulled out and the core wire 4 and the untwisting wire 6 are untwisted simultaneously, but they can also be performed separately. Alternatively, the core wire 4 and the untwisting wire 6 can be untwisted after the sheath front end 5A has been completely pulled out. The front end gripping clamp 26 can also grip the front ends of the core wire 4 and the untwisting wire 6 exposed from the sheath 5. Furthermore, the sheath front end 5A can be pulled out using a device separate from the untwisting device 1. When different devices are used to pull out the sheath front end 5A and untwist the core wire 4 and the untwisting wire 6, the untwisting device 1 may not include the pulling out device 30.

[0069] The method for rotating the front end portion 5A of the sheath is not particularly limited. The structure used to rotate the front end portion 5A of the sheath is not particularly limited. For example, it may be configured such that the front end gripping clamp 26 has a pair of upper and lower clamping members that move in opposite directions in the left-right direction while clamping the front end portion 5A of the sheath. In this case, the front end portion 5A of the sheath is rotated by being rolled by the pair of upper and lower clamping members.

[0070] The structure of the intermediate gripping clamp 61 is not limited to the embodiment described above. For example, the intermediate gripping clamp 61 may also have any structure capable of gripping the exposed core wire 4 and the stripping wire 6. For example, the intermediate gripping clamp 61 may also have a pair of left and right plate-shaped members for gripping the core wire 4 and the stripping wire 6 instead of the roller 61a that abuts against the core wire 4 and the stripping wire 6. The plate-shaped members may also be configured to slide relative to the core wire 4 and the stripping wire 6.

[0071] In the above embodiment, the multi-core cable 3 has four core wires 4 and one stripper wire 6. However, the number of core wires 4 and the number of stripper wires 6 are not particularly limited. Furthermore, the stripper wire 6 is not mandatory. The multi-core cable 3 may also have multiple covered wires and no uncovered wires. Alternatively, the multi-core cable 3 may have multiple uncovered wires and no covered wires.

[0072] The gripping force of the intermediate gripping clamp 61 can be greater than or less than the gripping force of the front gripping clamp 26. The gripping force of the intermediate gripping clamp 61 can also be equal to the gripping force of the front gripping clamp 26.

[0073] Explanation of reference numerals in the attached figures 1. Untwisting device for multi-core cables 3. Multi-core cable 4. Sheathed wires (core wires) 5. Sheath 5A Sheath Front End 5B Sheath (non-front end) 6. Uninsulated electrical wires (barrier wires) 10 Holding device 11. Hold the clamp 20 Front-end holding device 26. Front-end gripping fixture 30 Pull-out device 40 Rotating device 60 Intermediate holding device 61. Intermediate gripping fixture 61a roller 70. Intermediate holding and moving device 80 Control device

Claims

1. A de-twisting device for a multi-core cable, comprising correcting the twisted state of the wires in a multi-core cable having multiple wires and a sheath covering the wires, and including: A retaining clamp that holds the non-front end of the sheath of the multi-core cable; A front-end gripping clamp grips the front end of the wire exposed from the sheath or the front end of the sheath; An intermediate gripping clamp that grips the wire between the retaining clamp and the front gripping clamp; and A rotating device that causes the front end gripping clamp to rotate.

2. The untwisting device for multi-core cables according to claim 1, characterized in that, It also includes a pull-out device that moves the front-end gripping clamp away from the holding clamp along the axial direction of the multi-core cable.

3. The untwisting device for multi-core cables according to claim 1 or 2, characterized in that, Multiple intermediate gripping clamps are provided along the length of the multi-core cable.

4. The untwisting device for multi-core cables according to claim 1 or 2, characterized in that, It also includes an intermediate gripping and moving device, which moves the intermediate gripping clamp along the axial direction of the multi-core cable.

5. The untwisting device for a multi-core cable according to claim 4, characterized in that, The intermediate gripping fixture has rollers for abutting the wire.

6. The untwisting device for a multi-core cable according to claim 5, characterized in that, The roller is configured to rotate.

7. The untwisting device for multi-core cables according to claim 2, characterized in that, have: An intermediate gripping and moving device that moves the intermediate gripping clamp axially in the multi-core cable; and A control device that controls the pull-out device and the intermediate gripping movement device. The control device performs the following controls: Move the front end gripping clamp away from the holding clamp; and While the wire is being held by the intermediate gripping clamp, the intermediate gripping clamp is moved away from the holding clamp.

8. The untwisting device for a multi-core cable according to claim 2, characterized in that, have: An intermediate gripping and moving device that moves the intermediate gripping clamp axially in the multi-core cable; and A control device that controls the pull-out device and the intermediate gripping movement device. After the control device pulls the front end of the sheath from the wire by moving the front end gripping clamp away from the holding clamp, it moves the intermediate gripping clamp away from the holding clamp while holding the wire with the intermediate gripping clamp.

9. The untwisting device for a multi-core cable according to claim 2, characterized in that, Multiple intermediate holding clamps are provided along the length of the multi-core cable. It is equipped with a control device that controls the pull-out device and the intermediate gripping clamp. The control device moves the front gripping clamp away from the holding clamp, and sequentially causes the plurality of intermediate gripping clamps to grip the wire, starting from the intermediate gripping clamp closest to the holding clamp.

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