Wire clamping device and wire pulling device

Abstract

The utility model provides a wire clamping device and a wire pulling device which are good in operability. According to one mode of the utility model, the utility model provides the wire clamping device which is used for clamping the linear body. The wire clamping device comprises a wire clamping part, a displacement mechanism and a motor. The wire clamping part is provided with a first component and a second component. The first member has a tapered groove. The second member is disposed so as to abut against a portion of the groove, thereby forming a nip space in the non-abutting gap. The displacement mechanism is configured so as to change the size of the clamping space by displacing the positions and forms of the first member and the second member. The positional form has a first form and a second form. In the first form, the wire-shaped body is clamped by the wire clamping part. And in the second form, the clamping of the wire clamping part on the linear body is released. The motor is configured to generate rotational power for applying power to the displacement mechanism.

Description

Technical Field

[0001] The utility model relates to a wire clamp and a wire pulling device. Background Art

[0002] Patent Document 1 discloses a wire gripper that can maintain a good gripping state even when a force in a direction opposite to the tension is generated, and also has a tension adjustment function.

[0003] As an electric wire clamping mechanism, the wire clamping device has a wedge portion composed of an upper side and a lower side wedge. The wedge portion is held on the main body in a manner of surrounding the side surface in the thickness direction and the upper side and lower side inclined portions. In the upper side wedge, an inclined groove formed on the back side is slidably engaged with an inclined protrusion formed on the main body. The lower side wedge is connected via a detaching guide portion that can guide the ground in a direction opposite to the upper side wedge. A base having an inclined lower guide portion formed at the upper end is interposed between the lower side wedge and the lower portion of the main body. The upper end of the eye bolt screwed to the main body is freely rotatably connected to the lower end of the base.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Publication No. 2018-11495 Utility Model Content

[0007] Problems to be solved by utility models

[0008] However, wire pulling operations are often performed at high places, and a wire gripper with good operability is required to quickly and safely perform the operation. In view of the above situation, the present invention aims to provide a wire gripper and a wire pulling device with good operability.

[0009] Solutions for solving problems

[0010] According to one embodiment of the utility model, there is provided a wire clamp for use in clamping a linear body. The wire clamp includes a wire clamping portion, a displacement mechanism, and a motor. The wire clamping portion includes a first component and a second component. The first component includes a tapered groove. The second component is configured to abut against a portion of the groove, thereby forming a clamping space in the non-abutting gap. The displacement mechanism is configured to displace the positional form of the first component and the second component, thereby changing the size of the clamping space. The positional form includes a first form and a second form. In the first form, the linear body is clamped by the wire clamping portion. In the second form, the clamping of the linear body by the wire clamping portion is released. The motor is configured to generate a rotational power for imparting power to the displacement mechanism.

[0011] According to this aspect, the wire pulling operation can be performed quickly and safely by simply operating the wire gripper. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view which shows the wire pulling device 100 of this embodiment.

[0013] Figure 2 It means respectively Figure 1 A three-dimensional view of the structure of the support member 300a.

[0014] Figure 3 It means respectively Figure 1 A three-dimensional view of the structure of the support member 300b.

[0015] Figure 4 It is a perspective view showing the wire gripper 1 according to the present embodiment.

[0016] Figure 5A , Figure 5B It is a perspective view showing the wire gripper 1 according to the present embodiment.

[0017] Figure 6 It is an exploded perspective view showing the structure of the wire gripping unit 2 and the displacement mechanism 3.

[0018] Figure 7 It is an exploded perspective view showing the structure of the thread clamping unit 2 and the thread shape detecting mechanism 6.

[0019] Figure 8 It is an exploded perspective view showing the structure of the motor 4 and the transmission mechanism 5 .

[0020] Fig. 9A , Fig. 9B It is a left side view showing the structure of the transmission mechanism 5.

[0021] Fig.10 It is a block diagram showing the structure of the control substrate 7. DETAILED DESCRIPTION

[0022] The following is an explanation of the embodiments of the present invention using the drawings. Various features shown in the following embodiments can be combined with each other.

[0023] However, the computer program for implementing the software appearing in this embodiment may be provided as a computer-readable non-transitory storage medium (Non-Transitory Computer-Readable Medium), or may be provided by being downloaded from an external server, or may be provided as a computer program that is launched on an external computer and implements its functions on a client terminal (so-called cloud computing).

[0024] In addition, in this embodiment, the "unit" may include, for example, a combination of hardware resources implemented by a generalized circuit and software information processing that can be specifically implemented by such hardware resources. In addition, although various information is processed in this embodiment, such information is a physically meaningful numerical value representing a signal value of a voltage or current, or can be represented as a high or low signal value of a binary bit set composed of 0 or 1, or can be represented by quantum superposition (i.e., so-called quantum bit), and communication or operation can be performed on a generalized circuit.

[0025] In addition, a circuit in a broad sense is a circuit realized by at least appropriately combining circuits, circuit types, processors, and memories, etc. That is, it includes application-specific integrated circuits (ASICs), programmable logic devices (e.g., simple programmable logic devices (SPLDs), complex programmable logic devices (CPLDs), and field programmable gate arrays (FPGAs)), etc.

[0026] <Wire pulling device>

[0027] First, the wire pulling device according to the present embodiment will be described. Figure 1 It is a front view which shows the wire pulling device 100 of this embodiment. Figure 2 and Figure 3 It means respectively Figure 1 300 in the structure of the support member. In addition, in the following description, Figures 1 to 3 ( Figures 4 to 9A , Fig. 9B The same is true for ), the upper side is referred to as "upper" or "above", and the lower side is referred to as "lower" or "below". Figures 1 to 3 ( Figures 4 to 9A , Fig. 9B The same is true), the right side is referred to as the "right" or "right side", and the left side is referred to as the "left" or "left side".

[0028] Figure 1 The wire pulling device (also referred to as a "strain bar") 100 shown is used, for example, when cutting a covered electric wire, exemplified as a linear body Ln, in an overhead state. Figure 1 In the figure, the covered wire is indicated by a double-dotted line.

[0029] The wire pulling device 100 includes a pair of wire grippers 1 for clamping a covered wire as an example of a linear body Ln, and a long retractor 200 having both ends connected to the wire grippers 1 via a connector 400. The retractor 200 is configured to retract the retractor 200 in the longitudinal direction by operating an operating portion 205 provided on the right side (the other side) of the retractor 200 in the longitudinal direction.

[0030] like Figure 1 As shown, the telescopic device 200 includes: a main body cylinder 201 having a cylindrical shape; and a small diameter cylindrical movable shaft 202 inserted into the main body cylinder 201 so as to be relatively movable in the longitudinal direction. The main body cylinder 201 is composed of a cylindrical portion 203 made of, for example, aluminum or FRP (fiber reinforced plastic) and a working portion 204 fixed to the end of the cylindrical portion 203.

[0031] The working part 204 includes a housing made of, for example, an aluminum alloy, and a gear transmission mechanism (not shown) connected to an operating part 205 protruding from the lower surface of the housing and operated by rotation, and accommodated in the housing. The gear transmission mechanism is connected to a threaded shaft extending in the length direction in the cylindrical part 203, and a nut (not shown) provided at the end of the main body cylindrical part 201 side of the moving shaft part 202 is screwed on the threaded shaft. In addition, the moving shaft part 202 is formed of, for example, FRP or the like.

[0032] When the telescopic device 200 is extended or retracted, the remote operating member (indirect tool) is engaged with the operating portion 205, and the operating portion 205 is rotated by the remote operating member. As a result, the threaded shaft in the cylindrical portion 203 is driven to rotate, and the movable shaft portion 202 screwed with the nut at the end and the threaded shaft moves in the axial direction. In this way, the movable shaft portion 202 is retracted from the main cylindrical portion 201, and the telescopic device 200 is configured to extend or retract.

[0033] A fixing member 500 capable of locking the coupling 400 is provided at each of the end of the main body tube portion 201 side and the end of the moving shaft portion 202 side of the retractor 200 .

[0034] In addition, the wire pulling device 100 includes a pair of supports 300 (support 300a and support 300b) attached to the retractor 200. Figure 2 and Figure 3As shown, the support members 300a and 300b include a support member body 302 having an opening 301 on one side and a closing piece 303 for closing the opening 301 of the support member body 302. According to such a structure, after the covered electric wire as an example of the linear body Ln is introduced into the inner side of the support member body 302 through the opening 301, the opening 301 of the support member body 302 is closed by the closing piece 303, so that the covered electric wire can be supported by the support member 300.

[0035] Furthermore, an engaging piece 306 is rotatably provided at the end of the support body 302 facing the opening 301 , and the engaging piece 306 engages with the closing piece 303 when the opening 301 is closed by the closing piece 303 .

[0036] like Figure 2 As shown in FIG. 1 , a through hole 304 is formed on the support 300a at the lower portion of the support body 302, through which the telescopic device 200 (moving shaft portion 202) is inserted. Figure 3 As shown, in the support 300 b , a through hole 305 through which the retractor 200 (cylindrical portion 203 ) is inserted is formed at the lower portion of the support body 302 .

[0037] In addition, the support 300b is provided with a fixing portion 307 at the lower portion of the support body 302, and the fixing portion 307 is used to fix the retractor 200 at a desired longitudinal position or a rotation angle around a predetermined axis. Furthermore, operation portions 308 and 309 for operating the fixing portion 307 by a remote operation member are provided on both sides. According to the support 300b, an operation (distribution operation) of changing the direction of the end portion of the cut right covered electric wire can be performed so that the ends of the cut covered electric wire do not contact each other.

[0038] Such a wire pulling device 100 (or a retractor 200 having a pair of wire grippers 1 at both ends) is used, for example, in the following manner. First, a pair of support members 300a, 300b are hooked on the coated wire. Then, the predetermined portion of the coated wire is clamped by the wire gripper 1 on the right side, and the predetermined portion of the coated wire is clamped by the wire gripper 1 on the left side. After that, the operating part 205 is operated to shrink the lengthwise dimension of the retractor 200, so that the pair of wire grippers 1 clamping the coated wire (an example of a linear body Ln) are brought closer. As a result, the coated wire is put in a tensioned state on the outside of the wire gripper 1 of the coated wire, and the portion between the two wire grippers 1 of the coated wire is relaxed, thereby performing the operation of cutting off the slack portion of the coated wire using an indirect live cutting tool. On the other hand, the operating part 205 can also be operated to extend the lengthwise dimension of the retractor 200, so that the pair of wire grippers 1 clamping the coated wire (an example of a linear body Ln) are separated. According to such an aspect, the wire gripper 1 can be easily operated, and the wire pulling operation can be performed quickly and safely.

[0039] <Wire clamp 1>

[0040] Next, the wire gripper 1 will be described. Figure 4 as well as Figure 5A , Figure 5B It is a perspective view showing the wire gripper 1 according to the present embodiment. Figure 6 It is an exploded perspective view showing the structure of the wire gripping unit 2 and the displacement mechanism 3. Figure 7 It is an exploded perspective view showing the structure of the thread clamping unit 2 and the thread shape detecting mechanism 6. Figure 8 It is an exploded perspective view showing the structure of the motor 4 and the transmission mechanism 5 . Fig. 9A , Fig. 9B It is a left side view showing the structure of the transmission mechanism 5.

[0041] Figure 4 The wire gripper 1 shown is a device used to grip a linear body Ln, and includes a wire gripper 2, a displacement mechanism 3, a motor 4, a transmission mechanism 5, a wire shape detection mechanism 6, a control substrate 7, and a power supply 8.

[0042] like Figures 4 to 6 As shown, the wire clamping part 2 includes a first component 21, a second component 22, a third component 23 and a connecting component 24. The displacement mechanism 3 includes a threaded shaft 31 and a washer 32. In the following description, the first component 21, the second component 22 and the displacement mechanism 3 are first described.

[0043] The first component 21 is composed of a block-shaped component, and has a tapered groove 21c and a through hole 21d. The groove 21c has a wire-gripping surface 21a and an inclined surface 21b on the inner surface of the groove, and the wire-gripping surface 21a and the inclined surface 21b are provided at opposite positions. The second component 22 is composed of a block-shaped component, and has a wire-gripping surface 22a, a sliding surface 22b, and a threaded hole 22c. The second component 22 has a wire-gripping surface 22a and a sliding surface 22b on the surfaces located on the opposite sides, respectively. In addition, the first component 21 and the second component 22 are configured in such a manner that the inclined surface 21b and the sliding surface 22b are in contact with each other. That is, the second component 22 is configured in such a manner that it contacts a portion of the groove 21c of the first component 21. In this way, the wire-gripping portion 2 sets the wire-gripping surface 21a and the wire-gripping surface 22a at opposite positions, respectively, thereby forming a clamping space CS for clamping the linear body Ln by the wire-gripping surface 21a and the wire-gripping surface 22a. That is, with such a structure, a sandwich space CS is formed in a gap where the first member 21 and the second member 22 do not abut against each other.

[0044] In the present embodiment, the line-gripping surface 21a and the line-gripping surface 22a have a V-shaped groove for clamping the linear body Ln. The line-gripping surface 21a and the line-gripping surface 22a may also have a circular arc-shaped groove instead of the V-shaped groove. More preferably, an anti-skid unit for the linear body Ln may be provided on the line-gripping surface 21a and the line-gripping surface 22a. Examples of the anti-skid unit include the formation of a sharp fine convex portion, the formation of a fine convex strip extending in the short side direction, and the bonding of a rubber component.

[0045] In addition, the first component 21 and the second component 22 are configured so that the size of the clamping space CS changes according to the displacement of the position form. The position form includes a first form and a second form. The first form is a position form that reduces the size of the clamping space CS, thereby enabling the linear body Ln to be clamped. The second form is a position form that expands the size of the clamping space CS, thereby enabling the clamping of the linear body Ln to be released. In other words, the position form is configured so that the linear body Ln is clamped in the first form and the clamping of the linear body Ln is released in the second form.

[0046] In the present embodiment, the first component 21 is fixedly arranged, and the second component 22 is configured to be displaced along the length direction of the linear body Ln by sliding relative to the first component 21. That is, the second component 22 is a block-shaped slider. In addition, the second component 22 preferably has a wedge-shaped, prism-shaped, quadrangular pyramid or quadrangular pyramid shape. According to such a method, the linear body Ln can be clamped more firmly by the wedge effect, so that the wire pulling operation can be performed quickly and safely. More preferably, the first component 21 and the second component 22 are engaged by the shape along the sliding direction. The shape along the sliding direction is, for example, a convex shape is provided on one side and a concave shape is provided on the other side. In addition, the wire clamping part 2 can be configured to displace both the first component 21 and the second component 22, or it can be configured to displace the first component 21 relative to the second component 22 that is fixedly arranged.

[0047] Specifically, if Figure 6 As shown, the first component 21 that is fixedly arranged has a through hole 21d, and the second component 22 that slides relative to the first component 21 has a threaded hole 22c. Note that the first component 21 may have a threaded hole, and the second component 22 may also have a through hole. That is, at least one of the first component 21 and the second component 22 has a threaded hole (for example, the threaded hole 22c). In addition, the through hole 21d and the threaded hole 22c are respectively arranged at positions opposite to each other along the sliding direction of the second component 22. The sliding direction of the second component 22 is a direction that is substantially the same as the length direction of the linear body Ln.

[0048] The screw shaft 31 has a screw portion 31a on one side in the longitudinal direction and a shaft portion 31c on the other side in the longitudinal direction. The screw shaft 31 also includes a flange portion 31b between the screw portion 31a and the shaft portion 31c.

[0049] The shaft portion 31c (threaded shaft 31) is inserted into the washer 32, and the flange portion 31b is in contact with the washer 32. Furthermore, the shaft portion 31c is inserted into the through hole 21d (first component 21), and the timing pulley 53 of the transmission mechanism 5 is fitted into the portion protruding from the first component 21 (a portion of the shaft portion 31c) (the details of the transmission mechanism 5 will be described later). Thus, the threaded shaft 31 as the displacement mechanism 3 is rotatably mounted in the through hole 21d (first component 21) in a state where the axial displacement is restricted. Furthermore, the threaded portion 31a (threaded shaft 31) is screwed into the threaded hole 22c of the second component 22. In other words, the displacement mechanism 3 has the threaded shaft 31 screwed into the threaded hole 22c. According to this structure, by the rotation of the threaded shaft 31, the threaded hole 22c (a portion of the second component 22) and the through hole 21d (a portion of the first component 21) approach or separate along the length direction of the linear body Ln. That is, the displacement mechanism 3 is configured to displace the second member 22 along the length direction of the linear body Ln in a state where the first member 21 is fixed. In other words, the displacement mechanism 3 is configured to displace at least one of the first member 21 and the second member 22 along the length direction of the linear body Ln.

[0050] The size of the sandwiching space CS changes according to the position of the second member 22 in the longitudinal direction of the linear body Ln. That is, the size of the sandwiching space CS changes according to the position of at least one of the first member 21 and the second member 22 in the longitudinal direction.

[0051] Specifically, the displacement mechanism 3 displaces the second component 22 along the inclined surface 21b of the tapered groove 21c. As described above, the taper of the groove 21c is composed of the line-catching surface 21a and the inclined surface 21b arranged opposite thereto. The line-catching surface 21a is a surface arranged along the length direction of the linear body Ln, and the inclined surface 21b is a surface arranged at an inclination opposite to the line-catching surface 21a. That is, the distance between the line-catching surface 21a and the inclined surface 21b is close on one side and separated on the other side in the length direction of the linear body Ln.

[0052] When the second component 22 is displaced toward the side where the distance between the clamping surface 21a and the inclined surface 21b is close, the distance between the clamping surface 21a and the clamping surface 22a is close, and the size of the clamping space CS can be reduced. That is, through the displacement mechanism 3, the position and form of the clamping portion 2 can be displaced to the first form. In addition, when the second component 22 is displaced toward the side where the distance between the clamping surface 21a and the inclined surface 21b is far away, the distance between the clamping surface 21a and the clamping surface 22a is far away, thereby expanding the size of the clamping space CS. That is, through the displacement mechanism 3, the position and form of the clamping portion 2 can be displaced to the second form. In short, the displacement mechanism 3 is configured to displace the position and form of the first component 21 and the second component 22, thereby changing the size of the clamping space CS.

[0053] like Figure 5A , Figure 5B As shown, in Figure 5A In the state shown, when the threaded shaft 31 is rotated toward the screwing side relative to the threaded hole 22c (for example, right rotation in the case of a right-hand thread), the threaded hole 22c (a part of the second member 22) is displaced so as to approach the through hole 21d (a part of the first member 21) (see Figure 5A The clamping part 2 is displaced from Figure 5A The status becomes Figure 5B That is, by displacing the position form of the wire gripper 1 to the second form, the clamping of the linear body Ln (not shown) can be released, or the linear body Ln can be prepared to be clamped from then on.

[0054] exist Figure 5B In the state shown, when the threaded shaft 31 is rotated toward the loosening side relative to the threaded hole 22c (for example, in the case of a right-hand thread, it is rotated to the left), the threaded hole 22c (a part of the second member 22) is displaced away from the through hole 21d (a part of the first member 21) (see Figure 5B The clamping part 2 is displaced from Figure 5B The status becomes Figure 5A That is, by displacing the position of the wire gripper 1 to the first state, the linear body Ln (not shown) can be clamped.

[0055] Next, the third component 23 will be described. The third component 23 is composed of a narrow plate and is rotatably mounted relative to the first component 21 and the second component 22. The third component 23 is configured to be adjacent to the first component 21 and the second component, respectively, and is thus configured to form a part of the clamping space CS. That is, the displacement mechanism 3 is configured to displace the third component 23 as the position and shape of the clamping portion 2 are displaced. That is, the third component 23 is configured so that its position and posture are displaced as the position and shape of the first component 21 and the second component 22 are displaced.

[0056] The first form is a positional form in which a hole through which the linear body Ln can be inserted is formed by the first component 21, the second component 22, and the third component 23. As a result, the linear body Ln can be fixed to the clamping space CS. The second form is a positional form in which a gap is formed through which the linear body Ln can be taken out of and put into the clamping space CS. As a result, the linear body Ln can be taken out of and put into the clamping space CS. In other words, in the first form, a hole through which the linear body Ln can be inserted is formed in at least a portion of the clamping space CS, and in the second form, a gap is formed through which the linear body Ln can be taken out of and put into the clamping space CS. This will be described in detail below.

[0057] like Figure 7 As shown, the through hole 23a of the third component 23 is set to penetrate from the front 23d of the third component 23 to the back 23e. The cylindrical portion 231b of the stepped bolt 231 is inserted through the through hole 23a, and the threaded head 231c is in contact with the front 23d. The threaded portion 231a is inserted into the through hole 241c of the connecting component 241 (a part of the connecting component 24), the through hole 21f of the first component 21, and the through hole 242c of the connecting component 242 (a part of the connecting component 24), and the nut 245 is screwed with the portion protruding from the through hole 242c. The details of the connecting component 24 will be described later. Furthermore, the bolt 232 is inserted through the through hole 23b of the third component 23, and the bolt 232 is screwed into the threaded hole 22d of the second component 22. As a result, the third component 23 is rotatably mounted relative to the first component 21 and the second component 22, respectively.

[0058] exist Figure 5A In the state shown, the third member 23 is arranged to be close to the clamping surface 21a of the first member 21 and the clamping surface 22a of the second member 22. Thus, the third member 23 is arranged to form a part of the clamping space CS, and a hole through which the linear body Ln can be inserted is formed by the first member 21, the second member 22 and the third member 23. Figure 5A The state of the second form is changed to Figure 5B state, the third component 23 is displaced along with the displacement of the second component 22. As a result, the third component 23 is displaced in a manner of moving away from the first component 21, thereby forming a gap that enables the linear body Ln to enter and exit the clamping space CS. In summary, in the case of displacement from the second form to the first form, that is, in the case where the linear body Ln that has not yet been clamped is inserted into the clamping space CS, the wire clamping portion 2 is constructed so that the linear body Ln before clamping stays in the clamping space CS through the displacement of the third component 23. According to this method, the operation of installing the linear body Ln on the wire clamp 1 becomes simpler, so that the wire pulling operation can be performed quickly and safely.

[0059] Next, the connecting member 24 will be described. Figure 4 and Figure 7 As shown, the connecting member 24 is composed of a narrow plate and has connecting members 241 and 242. The connecting member 241 and the connecting member 242 are installed to sandwich the first member 21, and the through hole 241a of the connecting member 241 is overlapped with the through hole 242a of the connecting member 242 to form the through hole 24a. The bolt 243 is inserted into the through hole 241b of the connecting member 241, and the threaded head of the bolt 243 abuts against the through hole 241b. The bolt 243 is also inserted into the through hole 21e of the first member 21 and the through hole 242b of the connecting member 242, and the nut 244 is screwed with the portion protruding from the through hole 242b. As described above, the stepped bolt 231 is inserted through the through hole 241c of the connecting member 241 and the through hole 242c of the connecting member 242, and is screwed to the nut 245. The connecting member 24 is fixedly mounted on the first member 21 by the above structure, and the connecting piece 400 of the wire pulling device 100 is connected to the through hole 24 a.

[0060] like Figure 8 as well as Fig. 9A , Fig. 9B As shown, the motor 4 has a rotating shaft 41 and a housing 42, and the transmission mechanism 5 has synchronous pulleys 51 to 53, a synchronous belt 54, and a plate 55. The housing 42 is fixed to the plate 55, and the rotating shaft 41 is inserted through the through hole 55a of the plate 55. On the rotating shaft 41, the synchronous pulley 51 is embedded in the portion protruding from the through hole 55a. The bolt 521 is inserted through the synchronous pulley 52, and the head of the bolt 521 is in contact with the synchronous pulley 52. ​​The bolt 521 is also inserted through the through hole 55b of the plate 55, and the nut 522 is screwed into the portion protruding from the through hole 55b. As described above, the synchronous pulley 53 is embedded in the threaded shaft 31. The plate 55 is screwed with the first component 21 through the bolt 551 and the bolt 552. Through the above structure, the synchronous pulleys 51 to 53 are configured to be able to be wound with the synchronous belt 54 for transmitting power.

[0061] like Fig. 9A As shown, the timing belt 54 is wound around the timing pulleys 51 to 53 and mounted on the wire clamp 1. By screwing the bolt 523 into the threaded hole 55c and tightening the bolt 523, the timing pulley 52 is displaced (refer to Fig. 9A (see the thick arrow above). Fig. 9BAs shown, by tightening the bolt 523, the synchronous pulley 52 can be displaced, and the synchronous belt 54 can be adjusted to a predetermined tension. By making the synchronous belt 54 a predetermined tension, the transmission mechanism 5 can smoothly transmit the power from the motor 4 to the threaded shaft 31. According to such a structure, the rotational force of the rotating shaft 41 of the motor 4 can be transmitted to the threaded shaft 31 of the displacement mechanism 3 via the synchronous pulleys 51 to 53 and the synchronous belt 54. That is, the rotational force transmission mechanism is composed of the synchronous pulleys 51 to 53 and the synchronous belt 54. Through the above structure, the motor 4 is configured to generate a rotational power for imparting power to the displacement mechanism 3, specifically, the motor 4 is configured to impart power to the threaded shaft 31. According to such a mode, the wire gripper 1 can be operated with higher precision, so that the wire pulling operation can be performed quickly and safely. Furthermore, the transmission mechanism 5 is configured to transmit the rotational power generated by the motor 4 to the displacement mechanism 3, and specifically, the transmission mechanism 5 is composed of a belt (as an example, the synchronous belt 54 in the present invention) or a gear. According to such a method, the wire gripper 1 can be made more compact. In addition, it is not limited to the structure in which the threaded shaft 31 of the displacement mechanism 3 and the threaded hole 22c of the second component 22 are screwed together. For example, a rack and pinion mechanism can also be used. In this case, at least one of the first component 21 and the second component 22 is configured to have a rack, and the displacement mechanism 3 has a pinion that meshes with the rack, thereby forming a rack and pinion mechanism. Furthermore, the motor 4 is configured to impart power to the pinion. According to such a method, the wire gripper 1 can be operated with higher precision, so that the wire pulling operation can be performed quickly and safely.

[0062] like Figure 4 , Figure 5A , Figure 5B as well as Figure 7 As shown, the linear detection mechanism 6 is formed in a block shape. The bolt 63 is inserted through the through hole 6a of the linear detection mechanism 6, and the threaded hole 21g of the first member 21 is screwed into the portion protruding from the through hole 6a. Therefore, the linear detection mechanism 6 is fixedly provided on the first member 21.

[0063] The linear detection mechanism 6 includes a first position sensor 61 and a second position sensor 62, and the first position sensor 61 and the second position sensor 62 include a button 61a and a button 62a, respectively. A third component 23 is provided near the linear detection mechanism 6, and the third component 23 is configured to press the button 61a or the button 62a as the position of the clamping part 2 is displaced. Specifically, Figure 5A As shown in FIG. 1 , when the clamping space CS is narrowed to a predetermined size, the button 62a is pressed by the protrusion 23c of the third component 23. Figure 5BAs shown, in a state where the clamping space CS is expanded to a predetermined size, the button 61a is pressed by the side surface of the third member 23. By pressing the button 61a and the button 62a, the first position sensor 61 and the second position sensor 62 can be turned on.

[0064] The motor 4 of the present embodiment has an encoder 60 (not shown) inside thereof, and is configured to be able to measure the rotation speed of the rotating shaft 41. That is, the linear detection mechanism 6 also includes the encoder 60, and the encoder 60 is configured to measure the rotation speed of the motor 4. Examples of the encoder 60 include an optical form, a mechanical (contact type) form, a magnetic form, an electromagnetic induction form, etc. In the present embodiment, the encoder 60 is disposed inside the motor 4, but is not limited to this, and may be disposed, for example, in the displacement mechanism 3, the transmission mechanism 5, etc.

[0065] According to this structure, Figure 5B As shown, the position of the button 61a of the first position sensor 61 can be pressed by the side of the third component 23, that is, the position where the size of the clamping space CS is the largest, is specified as the position where the encoder 60 starts to measure the rotation speed of the rotating shaft 41. The encoder 60 measures the rotation speed of the rotating shaft 41 with this position as the base point. In addition, when the linear body Ln is clamped by the wire clamping part 2, the rotation of the rotating shaft 41 of the motor 4 stops at the clamping position or becomes slower. That is, by using the encoder 60 to grasp the change in the angular velocity of the rotating shaft 41, the wire clamp 1 can specify the state of clamping the linear body Ln. In addition, the wire clamp 1 can also specify the state of clamping the linear body Ln by grasping the change in the current value in the action of the motor 4. Through this structure, the wire clamp 1 can measure the thickness (outer diameter) of the linear body Ln clamped by the wire clamping part 2. By comparing the measurement results with the database, the type of the linear body Ln can be detected. In other words, the first position sensor 61 is configured to identify the position where the rotation speed measurement starts, thereby detecting the type of the linear body Ln clamped by the wire clamping unit 2. According to this aspect, the wire clamping device 1 can detect the type of the linear body Ln, so that the wire pulling operation can be performed quickly and safely.

[0066] On the other hand, when the protrusion 23c of the third component 23 presses the button 62a of the second position sensor 62, since the clamping space CS is in a state of being narrowed to a predetermined size, it is possible to stop the power supply to the motor 4. In other words, the second position sensor 62 is configured to stop the rotation of the motor 4. According to this method, the deterioration or damage of the wire clamp 1 can be appropriately prevented.

[0067] In addition, the linear detection mechanism 6 for detecting the type of the linear body Ln clamped by the wire clamping part 2 is not limited to the above-mentioned structure. For example, it can also be constructed by setting a pressure sensor on the wire clamping surface 21a of the first part 21 and the wire clamping surface 22a of the second part 22, setting a sensor for measuring the distance between the first part 21 and the second part 22, etc.

[0068] like Figure 4 and Figure 8 As shown, the power supply unit 8 is arranged below the motor 4, and has a battery 81 and a battery mounting portion 82. The battery 81 is detachably mounted on the battery mounting portion 82, and the battery mounting portion 82 is fixedly provided on the clamping portion 2. The power supply unit 8 is configured to be able to supply power to at least the motor 4. In addition, the battery 81 may be, for example, a primary battery such as a dry cell, a solar cell, or a secondary battery such as a lithium ion battery.

[0069] like Figure 4 and Figure 8 As shown, the control board 7 is mounted on a support stand 74, and the support stand 74 is fixed to the wire clamping unit 2. In addition, a cover (not shown) covering the control board 7 is preferably provided.

[0070] Fig.10 It is a block diagram showing the structure of the control substrate 7. Fig.10 The control substrate 7 shown is, for example, a dedicated control device for controlling at least the motor 4, and is configured to electrically control at least the rotation of the motor 4. The control substrate 7 includes a communication unit 71, a storage unit 72, and a control unit 73, and these components are electrically connected via a communication bus 70. In addition to the motor 4, the control substrate 7 is also electrically connected to a wired detection mechanism 6 and a power supply unit 8.

[0071] The communication unit 71 is configured to be able to send various electrical signals from the control substrate 7 to external components. In addition, the communication unit 71 is configured to be able to receive various electrical signals sent from external components to the control substrate 7. More preferably, the communication unit 71 may have a network communication function, whereby the communication unit 71 may communicate various information with external devices via a network such as the Internet.

[0072] The communication unit 71 is preferably a wired communication means such as USB (Universal Serial Bus) (registered trademark), IEEE (Institute of Electrical and Electronics Engineers) 1394, Thunderbolt, wired LAN (Local Area Network) network communication, etc., but it may also include wireless LAN network communication, mobile communication such as 3G (Third Generation Mobile Communication; third generation mobile communication technology) / LTE (Long Term Evolution; long term evolution technology) / 5G (Fifth Generation Mobile Communication; fifth generation mobile communication technology), Bluetooth (registered trademark) communication, etc., as needed. That is, it is more preferably implemented by combining these multiple communication means.

[0073] The storage unit 72 stores various information defined in the above description. It can be implemented, for example, as a storage device such as a solid state drive (SSD) to store various programs related to the wire clamp 1 executed by the control unit 73, or as a memory such as a random access memory (RAM) for storing temporary necessary information (parameters, sequences, etc.) related to program operations. The storage unit 72 stores various programs, variables, etc. related to the wire clamp 1 executed by the control unit 73. It is particularly preferred that information related to the engineering plan using the wire clamp 1 is stored.

[0074] The control unit 73 performs processing and control of the overall actions related to the wire clamp 1. The control unit 73 is, for example, a central processing unit (CPU) not shown in the figure. The control unit 73 implements various functions related to the wire clamp 1 by reading a predetermined program stored in the storage unit 72. That is, the information processing performed by the software stored in the storage unit 72 is specifically implemented by the control unit 73 as a hardware example. This will be further explained in detail in the next section. Note that the control unit 73 is not limited to a single one, and can also be implemented as having multiple control units 73 according to each function. In addition, it can also be a combination of these.

[0075] Next, a method of using the wire gripper 1 (wire pulling device 100 ) will be described by taking a case of gripping a covered electric wire (an example of a linear body Ln) as an example.

[0076] [1] First, the support members 300a and 300b are hooked on the coated wire. Then, a pair of wire grippers 1 connected to both ends of the retractor 200 are installed on the coated wire using a remote control. Specifically, the first component 21, the second component 22, and the third component 23 are displaced in the second form, the coated wire is inserted into the clamping space CS, and the wire gripping surface 21a of the first component 21 is hooked on the coated wire.

[0077] [2] Next, the wire gripper 1 is started using an external terminal (not shown). At this time, the control unit 73 of the control board 7 determines whether the encoder 60 has specified a position at which the measurement of the rotation speed of the rotating shaft 41 is started. If not specified, a learning operation is performed. Specifically, the control board 7 controls the operation of the motor 4 according to the user's operation or automatically until the button 61a of the first position sensor 61 is pressed on the side of the third component 23. When the button 61a is pressed on the side of the third component 23 and the control board 7 receives an input from the first position sensor 61, the control board 7 stops the operation of the motor 4 and specifies a position at which the encoder 60 starts measuring the rotation speed of the rotating shaft 41. In addition, the learning operation may be performed each time the wire gripper 1 is used. For example, the control board 7 may control the position of the wire gripper 1 after use as the learning position. In addition, the learning operation may be performed when the number of times the wire gripper 1 is used reaches a predetermined number of times, when the period / time of use of the wire gripper 1 reaches a predetermined period / time, etc.

[0078] [3] Then, the motor 4 is activated using an external terminal (not shown), and the threaded shaft 31 of the displacement mechanism 3 is rotated in a predetermined direction via the transmission mechanism 5. As a result, the second component 22 screwed on the threaded shaft 31 slides relative to the first component 21, and the third component 23 rotates relative to the first component 21 and the second component 22. By the rotation of the third component 23, the first component 21, the second component 22 and the third component 23 form a hole that can insert the coated wire through the clamping space CS. As a result, the coated wire can be held in the clamping space CS before clamping. In addition, by sliding the second component 22, the wire clamping surface 21a of the first component 21 and the wire clamping surface 22a of the second component 22 are close to each other, and the size of the clamping space CS is narrowed, so that the coated wire can be clamped. As a result, a pair of wire clamps 1 can be fixed to the coated wire.

[0079] In addition, the wire gripper 1 grasps the change in the angular velocity of the rotating shaft 41 based on the input of the encoder 60, and stops the operation of the motor 4 when the rotation of the rotating shaft 41 of the motor 4 stops or becomes lower speed. In addition, the wire gripper 1 can also stop the operation of the motor 4 according to the user's operation on the external terminal. Thereby, the first form of the first component 21 and the second component 22 can be maintained, and the state of clamping the coated wire can continue. In addition, in the linear detection mechanism 6, the measurement result of the thickness (outer diameter) of the clamped coated wire is used to detect the type of the coated wire. The result is notified to the external terminal (not shown). Furthermore, in the case where the user has pre-registered the coated wire of the clamping object, it is determined whether the coated wire clamped in the wire gripper 1 is consistent with the registered coated wire, and the result is notified to the external terminal (not shown).

[0080] [4] When the coated wire is cut, the operating unit 205 is operated by the remote control member to shrink the length of the retractor 200 and bring the wire grippers 1 closer to each other. As a result, the coated wire is in a tensioned state outside the wire grippers 1 of the coated wire, and the portion between the two wire grippers 1 of the coated wire can be relaxed.

[0081] [5] After the operation is completed, the operating part 205 is operated by the remote operating part to extend the length of the retractor 200 and separate the wire clamps 1 from each other. Then, the motor 4 is activated by the external terminal, and the threaded shaft 31 of the displacement mechanism 3 is rotated in the opposite direction to the above through the transmission mechanism 5. As a result, the first component 21 and the second component 22 are displaced from the first form to the second form, and the clamping of the coated wire is released. Finally, the wire pulling device 100 is removed from the coated wire using the remote operating part.

[0082] As described above, according to the present embodiment, the clamping action of the wire gripper 1 on the coated wire is configured to be performed by the motor 4. In this way, the wire gripper 1 itself assists the operation that requires greater force, so the operability is good. In addition, the situation in which two operators were required to perform the operation on the aerial scaffolding in the past can be realized by one operator, so the operability is excellent. In addition, the remaining operator can grasp the working status of the operator on the scaffolding on the ground and give correct instructions, so the safety is higher. According to this method, the wire gripper 1 can be easily operated, so that the wire pulling operation can be performed quickly and safely.

[0083] Furthermore, if various sensors are installed on the wire gripper 1, the data obtained during the operation can be sent to an external terminal (such as a tablet terminal, etc.) via the communication unit 71 of the control substrate 7 and accumulated. Moreover, based on the obtained data, it is possible to confirm the operation history, manage whether the wire gripper 1 needs to be repaired, etc., which is also preferred from the perspective of improving safety. In addition, the external terminal can also be a foot switch, a voice recognition device, etc. In this case, even if working alone, both hands can be free when operating the wire gripper 1. In addition, even when working on multiple coated wires simultaneously using the wire pulling device 100, one external terminal can be used for wire pulling operations, etc.

[0084] In addition, the present invention can also be provided in the following various ways.

[0085] (1) A wire clamp used when clamping a linear body, characterized in that it includes: a wire clamping portion, a displacement mechanism and a motor; the wire clamping portion has a first component and a second component, the first component has a tapered groove, the second component is configured in a manner of abutting against a portion of the groove, thereby forming a clamping space in the non-abutting gap, the displacement mechanism is configured to displace the positional form of the first component and the second component, thereby changing the size of the clamping space, wherein the positional form has a first form and a second form, in the first form, the wire clamping portion clamps the linear body, and in the second form, the clamping of the linear body by the wire clamping portion is released, and the motor is configured to generate a rotational power for imparting power to the displacement mechanism.

[0086] According to this aspect, the wire pulling operation can be performed quickly and safely by simply operating the wire gripper.

[0087] (2) The wire gripper according to the above (1), wherein the first component is fixedly disposed, and the second component is a slider that slides relative to the first component.

[0088] (3) The wire gripper according to (1) or (2) above, wherein the second member has a wedge shape, a prism shape, a quadrangular pyramid shape, or a quadrangular pyramid shape.

[0089] According to such a mode, the linear body can be clamped more firmly by the wedge effect, and the wire pulling operation can be performed quickly and safely.

[0090] (4) A wire clamp according to any one of (1) to (3) above, wherein the displacement mechanism is configured to displace at least one of the first component and the second component in the length direction of the linear body, and the size of the clamping space varies according to the position in the length direction.

[0091] (5) A wire gripper according to any one of (1) to (4) above, wherein at least one of the first component and the second component has a threaded hole, the displacement mechanism has a threaded shaft threadedly engaged with the threaded hole, and the motor is configured to impart power to the threaded shaft.

[0092] According to such an aspect, the wire gripper can be operated with higher accuracy, and the wire pulling operation can be performed quickly and safely.

[0093] (6) A wire gripper according to any one of (1) to (4) above, wherein at least one of the first component and the second component has a rack, the displacement mechanism has a pinion meshing with the rack, thereby forming a rack and pinion mechanism, and the motor is configured to impart power to the pinion.

[0094] According to such an aspect, the wire gripper can be operated with higher accuracy, and the wire pulling operation can be performed quickly and safely.

[0095] (7) The wire gripper according to any one of (1) to (6) above, further comprising a transmission mechanism configured to transmit the rotational power generated by the motor to the displacement mechanism.

[0096] (8) The wire gripper according to (7) above, wherein the transmission mechanism is a belt or a gear.

[0097] According to this aspect, the wire gripper can be further miniaturized.

[0098] (9) A wire clamp according to any one of (1) to (8) above, wherein the wire clamping portion further comprises a third component, the third component is configured to form a portion of the clamping space, the displacement mechanism is configured to displace the third component as the position form is displaced, and in the first form, a hole through which the linear body can be inserted is formed in at least a portion of the clamping space, and in the second form, a gap through which the linear body can be taken out and placed is formed in the clamping space.

[0099] According to such an aspect, the operation of attaching the linear body to the wire gripper can be made easier, and the wire pulling operation can be performed quickly and safely.

[0100] (10) A wire gripper according to any one of (1) to (9) above, further comprising a linear type detection mechanism, wherein the linear type detection mechanism has an encoder and a first position sensor, the encoder being configured to measure the rotational speed of the motor, and the first position sensor being configured to specify a position for starting the measurement of the rotational speed, thereby detecting the type of the linear body clamped by the wire gripper.

[0101] According to such an aspect, the type of the linear body can be detected by the wire gripper, so that the wire pulling operation can be performed quickly and safely.

[0102] (11) The wire gripper according to any one of (1) to (10) above, further comprising a second position sensor configured to identify a position at which the rotation of the motor is stopped.

[0103] According to such an aspect, it is possible to appropriately prevent the wire gripper from being deteriorated or damaged.

[0104] (12) The wire gripper according to any one of (1) to (11) above, further comprising a control substrate configured to electrically control at least the rotation of the motor.

[0105] (13) The wire gripper according to any one of (1) to (12) above, further comprising a power supply unit that supplies electric power to at least the motor.

[0106] (14) A wire pulling device, characterized in that it comprises: a pair of wire grippers and a retractor, wherein the pair of wire grippers are respectively constituted by the wire grippers described in any one of (1) to (13) above, and the retractor is constructed so that the pair of wire grippers are provided at its two ends so that the pair of wire grippers clamping the linear body can be brought close to and separated from each other.

[0107] According to this aspect, the wire pulling operation can be performed quickly and safely by simply operating the wire gripper.

[0108] Of course, it's not limited to this.

[0109] Finally, although various embodiments of the utility model have been described, these embodiments are presented only as examples and are not intended to limit the scope of the utility model. The relevant new embodiments can be implemented in various other ways, and various omissions, substitutions and modifications can be made without departing from the scope of the utility model. The embodiment or its variation can be included in the scope or spirit of the utility model, and can be included in the utility model described in the claims and its equivalent.

[0110] Description of Reference Numerals

[0111] 100: Wire pulling device,

[0112] 200: telescopic device,

[0113] 201: Main body tube,

[0114] 202: Moving shaft,

[0115] 203: Cylindrical part,

[0116] 204: Work Department,

[0117] 205: Operation Department,

[0118] 300: Supporting parts,

[0119] 300a: Supporting parts,

[0120] 300b: Supporting member,

[0121] 301: opening,

[0122] 302: Support body,

[0123] 303: Closure piece,

[0124] 304: Through hole,

[0125] 305: Through hole,

[0126] 306: snap-fit ​​piece,

[0127] 307: Fixed part,

[0128] 308: Operation Department,

[0129] 309: Operation Department,

[0130] 400: Connectors,

[0131] 500: fixed parts,

[0132] 1: Wire clamp,

[0133] 2: Wire clamping part,

[0134] 21: First component,

[0135] 21a: Card line surface,

[0136] 21b: inclined surface,

[0137] 21c: slot,

[0138] 21d: through hole,

[0139] 21e: Through hole,

[0140] 21f: through hole,

[0141] 21g: threaded hole,

[0142] 22: The second part,

[0143] 22a: card line surface,

[0144] 22b: sliding surface,

[0145] 22c: threaded hole,

[0146] 22d: threaded hole,

[0147] 23: The third component,

[0148] 23a: through hole,

[0149] 23b: Through hole,

[0150] 23c: protrusion,

[0151] 23d: front,

[0152] 23e: back,

[0153] 231: Step bolts,

[0154] 231a: threaded part,

[0155] 231b: cylindrical part,

[0156] 231c: threaded head,

[0157] 232: Bolts,

[0158] 24: Connecting parts,

[0159] 24a: through hole,

[0160] 241: Connecting parts,

[0161] 241a: through hole,

[0162] 241b: Through hole,

[0163] 241c: through hole,

[0164] 242: Connecting parts,

[0165] 242a: through hole,

[0166] 242b: through hole,

[0167] 242c: through hole,

[0168] 243: Bolts,

[0169] 244: Nuts,

[0170] 245: Nuts,

[0171] 3: Displacement mechanism,

[0172] 31: threaded shaft,

[0173] 31a: threaded part,

[0174] 31b: flange part,

[0175] 31c: shaft,

[0176] 32: Washer,

[0177] 4: Motor,

[0178] 41: Rotation axis,

[0179] 42: Shell,

[0180] 5: Transmission mechanism,

[0181] 51: Synchronous pulley,

[0182] 52: Synchronous pulley,

[0183] 521: Bolts,

[0184] 522: Nuts,

[0185] 523: Bolts,

[0186] 53: Synchronous pulley,

[0187] 54: Synchronous belt,

[0188] 55: board,

[0189] 55a: through hole,

[0190] 55b: through hole,

[0191] 55c: threaded hole,

[0192] 551: Bolts,

[0193] 552: Bolts,

[0194] 6: Linear detection mechanism,

[0195] 6a: Through hole,

[0196] 60: encoder,

[0197] 61: First position sensor,

[0198] 61a: Button,

[0199] 62: Second position sensor,

[0200] 62a: Button,

[0201] 63: Bolts,

[0202] 7: Control board,

[0203] 70: Communication bus,

[0204] 71: Ministry of Communications,

[0205] 72: Storage Department,

[0206] 73: Control Department,

[0207] 74: Support platform,

[0208] 8: Power supply department,

[0209] 81: Battery,

[0210] 82: Battery installation part,

[0211] CS: Clamping space,

[0212] Ln: linear body.

Claims

1. A wire clamp used when clamping a linear object, characterized in that: include: Wire clamping unit, displacement mechanism and motor; The wire clamping part comprises a first component and a second component. The first component has a tapered groove, The second member is arranged to abut against a portion of the groove, thereby forming a clamping space in the gap where the second member does not abut against the groove. The displacement mechanism is configured to displace the positions of the first component and the second component, thereby changing the size of the clamping space, wherein: The position form has a first form and a second form, In the first embodiment, the linear body is clamped by the wire clamping portion. In the second embodiment, the clamping of the linear body by the clamping portion is released. The motor is configured to generate rotational power for imparting power to the displacement mechanism.

2. The wire clamp according to claim 1, wherein: The first component is fixedly arranged, The second component is a slider that slides relative to the first component.

3. The wire clamp according to claim 1, wherein: The second component has a wedge shape, a prism shape, a quadrangular pyramid shape, or a quadrangular pyramid shape.

4. The wire clamp according to claim 1, wherein: The displacement mechanism is configured to displace at least one of the first member and the second member in the longitudinal direction of the linear body. The size of the clamping space varies according to the position in the length direction.

5. The wire gripper according to claim 1, wherein: At least one of the first component and the second component has a threaded hole, The displacement mechanism comprises a threaded shaft threadedly engaged with the threaded hole, The motor is configured to apply power to the threaded shaft.

6. The wire clamp according to claim 1, wherein: At least one of the first component and the second component has a rack. The displacement mechanism has a pinion meshing with the rack, thereby forming a rack and pinion mechanism, The motor is configured to apply power to the pinion gear.

7. The wire gripper according to claim 1, wherein: It also has a transmission mechanism. The transmission mechanism is configured to transmit the rotational power generated by the motor to the displacement mechanism.

8. The wire gripper according to claim 7, wherein: The transmission mechanism is a belt or a gear.

9. The wire clamp according to claim 1, wherein: The wire clamping part further comprises a third component, The third member is arranged in such a way as to form a part of the clamping space, The displacement mechanism is configured to displace the third member as the position shape is displaced. In the first embodiment, a hole through which the linear body can be inserted is formed in at least a portion of the clamping space. In the second aspect, a gap is formed in the clamping space so that the linear body can be taken out and put in.

10. The wire gripper according to claim 1, wherein: It also has a linear detection mechanism. The linear detection mechanism has an encoder and a first position sensor, The encoder is configured to measure the rotation speed of the motor. The first position sensor is configured to identify a position at which measurement of the rotation speed is started, thereby detecting the type of the linear object clamped by the thread clamping portion.

11. The wire gripper according to claim 1, wherein: Also provided is a second position sensor, The second position sensor is configured to identify a position at which rotation of the motor is stopped.

12. The wire gripper according to claim 1, wherein: It also has a control substrate. The control substrate is configured to at least electrically control the rotation of the motor.

13. The wire gripper according to claim 1, wherein: It also has a power supply unit. The power supply unit supplies electric power to at least the motor.

14. A wire pulling device, characterized in that: include: A pair of cable clamps and retractors, The pair of wire grippers are respectively constituted by the wire grippers described in any one of claims 1 to 13, The retractable device is provided with the pair of wire grippers at both ends thereof, and the pair of wire grippers that clamp the linear body are moved closer to and away from each other.

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