Cable grip spacer

Abstract

To provide a cable grip spacer that suppress damage to a cable to which a cable grip is attached and that is easy to handle.SOLUTION: A cable grip spacer 5 that is used when a cable grip 1 is attached to a terminal part 100a of a cable 100 formed of a plurality of twisted single core wires such as a first single core wire 101. The cable grip spacer 5 is a tubular elastic member that includes: an outer peripheral surface 10 having a circular shape in a cross section orthogonal to an axis direction; and an inner peripheral surface 20 with a shape in the cross section defined to conform to the shape of the entire outer periphery of the terminal part 100a. The cable grip spacer is nipped between a portion of the terminal part 100a disposed on the side of the inner peripheral surface 20 and a wire net 2 contained in the cable grip 1 and housing the terminal part 100a, and at least a portion is arranged on a tip side of the cable grip 1 relative to a band 4 fastening the wire net 2 to the terminal part 100a.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a cable grip spacer. [Background technology]

[0002] Conventionally, there are cable grips that are attached to the end of a cable and used when wiring the cable to a specific location or suspending it from a specific position. Patent Document 1 discloses a technology related to a cable grip that is attached to the end of a triplex cable. In this cable grip, a wedge-shaped spacer is inserted one by one into each gap of the twisted cables, thereby increasing the lateral pressure that tightens the cable when a pulling tension is applied to the wire net, and suppressing the displacement of the sheath and core of the cable. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-285776 Summary of the Invention [Problem to be solved by the invention]

[0004] In the cable grip disclosed in Patent Document 1, the wedge-shaped spacers are inserted one by one into the gaps between the twisted cables. Therefore, on the cable on which the wedge-shaped spacers are arranged, a part of the cable may be exposed on the wire net side through the gaps between the spacers, and when a large force is applied to the cable from the wire net, there is a concern that the sheath may be damaged at the exposed part. In addition, since there are three wedge-shaped spacers, each independent of the other, and the spacers cannot be held by the cable alone without the wire net, it is difficult for an operator to handle the cable grip when attaching it to the end of the cable.

[0005] The present invention has been made in view of the problems inherent in the conventional techniques, and an object of the present invention is to provide a cable grip spacer that is easy to handle and prevents damage to the cable to which it is attached. [Means for solving the problem]

[0006] One aspect of the present invention is a cable grip spacer used when a cable grip is attached to a terminal portion of a cable consisting of a plurality of single-core wires twisted together, the cable grip spacer being a cylindrical elastic member having an outer peripheral surface which has a circular shape in a cross section perpendicular to the axial direction, and an inner peripheral surface whose cross section shape is defined to follow the shape of the entire outer periphery of the terminal portion, the cable grip being sandwiched between a part of the terminal portion arranged on the inner peripheral surface side and a wire net included in the cable grip and containing the terminal portion, and at least a part of the cable grip being positioned toward the tip side of the cable grip than the band which tightens the wire net against the terminal portion. Effect of the Invention

[0007] According to the present invention, it is possible to provide a cable grip spacer that is easy to handle and prevents damage to the cable to which it is attached. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a side view of a cable grip including a spacer according to one embodiment. [Figure 2A] FIG. 2 is a front view of a spacer according to one embodiment. [Figure 2B] FIG. 2 is a top view of a spacer according to one embodiment. [Diagram 3] FIG. 2 is a cross-sectional view of the cable grip corresponding to the line III-III in FIG. [Figure 4A] FIG. 11 is a front view of a spacer according to a first modified example. [Figure 4B] FIG. 11 is a front view of a spacer according to a second modified example. [Diagram 5] FIG. 13 is a perspective view of a spacer according to a third modified example. [Figure 6] FIG. 13 is a top view of a spacer according to a fourth modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The cable grip spacer according to the embodiment will be described in detail below with reference to the drawings. Note that hereinafter, the cable grip spacer will be abbreviated as "spacer." Also, the dimensional ratios in the drawings are exaggerated for the convenience of explanation and may differ from the actual ratios.

[0010] 1 is a side view of a cable grip 1 including a spacer 5 according to one embodiment. The cable grip 1 is a jig that is attached to a terminal portion 100a of a cable 100 and is used when wiring the cable 100 to a specific location or suspending it from a specific position. For the sake of explanation, the extension direction of the cable grip 1 attached to the terminal portion 100a is defined as the Z direction below. In addition, two directions that are orthogonal to each other on an XY plane perpendicular to the Z direction are defined as the X direction and the Y direction.

[0011] In this embodiment, the cable 100 is a triplex cable in which one earth wire is provided and three CV cables are twisted together. CV cable is an abbreviation for cross-linked polyethylene insulated vinyl sheath cable. Specifically, the cable 100 includes a first single core wire 101, a second single core wire 102, a third single core wire 103, and an earth wire 104. The first single core wire 101, the second single core wire 102, and the third single core wire 103 are each a CV cable, and have a conductor 110, an insulator 111 covering the conductor 110, and a sheath 112 covering the insulator 111 (see FIG. 2). The material of the insulator 111 is cross-linked polyethylene. The earth wire 104 is, for example, an IV cable, and has a conductor 120 and a sheath 121 covering the conductor 120 (see FIG. 2). IV cable is an abbreviation for Indoor PVC (vinyl insulated wire) for indoor wiring.

[0012] The cable 100 also has three branch portions where the branch wires are exposed to the outside except for the terminal portion 100a covered by the cable grip 1. The first branch portion 101a branches off a first branch wire 101b from the first single-core wire 101. The second branch portion 102a branches off a second branch wire 102b from the second single-core wire 102. The third branch portion 103a branches off a third branch wire 103b from the third single-core wire 103.

[0013] The cable grip 1 comprises a wire net 2, a fixing portion 3, a band 4, and a spacer 5.

[0014] The wire net 2 is a member made of metal wire woven into a cylindrical shape so as to have flexibility overall, and houses the terminal portion 100a. One end of the wire net 2 is a fixed end bound by a fixing portion 3. The other end of the wire net 2 is an open end into which the terminal portion 100a is inserted.

[0015] As described above, the fixing part 3 binds and fixes one end of the wire net 2. The fixing part 3 also integrally includes, for example, a ring-shaped hook.

[0016] After the terminal portion 100a is housed in the wire net 2, the band 4 is wrapped around a part of the wire net 2 from the outer periphery side, thereby tightening the part of the wire net 2 toward the terminal portion 100a. Note that the shape, structure, material, number, etc. of the band 4 are not particularly limited.

[0017] Fig. 2A is a front view of the spacer 5 as viewed in the Z direction. Fig. 2B is a top view of the spacer 5 as viewed in the opposite direction to the Y direction, as an example. Fig. 3 is a cross-sectional view of the cable grip 1 corresponding to the III-III portion in Fig. 1. Fig. 3 shows one spacer 5 and a terminal portion 100a cut in the XY plane along the end face of the spacer 5. For convenience, Fig. 3 does not show a cross section of the wire net 2.

[0018] The spacer 5 is an elastic member that is attached to the terminal portion 100a when the cable grip 1 is attached to the terminal portion 100a. In this embodiment, two spacers 5 are used as an example.

[0019] The overall shape of the spacer 5 is cylindrical with the Z direction as the axial direction and has an outer peripheral surface 10 and an inner peripheral surface 20. As shown in Fig. 2B, the outer diameter of the spacer 5 is represented by outer diameter D, and the width of the spacer 5 along the axial direction is represented by width W. Note that Fig. 2A shows a central axis AX that extends along the Z direction and serves as a reference for defining the dimensions of the outer peripheral surface 10 and the inner peripheral surface 20.

[0020] The shape of the outer peripheral surface 10 is specified so that the shape of a cross section perpendicular to the axial direction is circular. Here, the cross section perpendicular to the axial direction refers to any cross section cut by a virtual XY plane. The outer peripheral surface 10 has grooves 11 formed in a lattice shape. The lattice shape of the grooves 11 may be, for example, a lattice shape at 45° to the Z direction.

[0021] The shape of the inner circumferential surface 20 is defined so that the cross-sectional shape follows the overall shape of the outer periphery of the terminal portion 100a. In this embodiment, the cable 100 includes the ground wire 104 in addition to three single-core wires such as the first single-core wire 101, and therefore the shape of the inner circumferential surface 20 follows the overall shape of the outer periphery of the terminal portion 100a including the ground wire 104, as shown in FIG. 2A. In other words, the specific shape of the inner circumferential surface 20 depends on the type or size of the cable 100.

[0022] Here, the cross-sectional shape of the cable 100 is a triangle shape in which the first single core wire 101, the second single core wire 102, and the third single core wire 103 are tightly bundled and integrated, as shown in Fig. 3. The first single core wire 101 contacts both the second single core wire 102 and the third single core wire 103. The second single core wire 102 contacts both the first single core wire 101 and the third single core wire 103. The third single core wire 103 contacts both the first single core wire 101 and the second single core wire 102. In addition, the earth wire 104 is integrated with the triplex cable so as to contact both the first single core wire 101 and the third single core wire 103.

[0023] In this case, the inner circumferential surface 20 that fits the cable 100 includes a first arcuate surface 21, a second arcuate surface 22, a third arcuate surface 23, and a fourth arcuate surface 24, as shown in FIG. 2A. The first arcuate surface 21 is in close contact with the sheath 112 of the first single core wire 101 to match the outer circumferential shape of the first single core wire 101. The second arcuate surface 22 is in close contact with the sheath 112 of the second single core wire 102 to match the outer circumferential shape of the second single core wire 102. The third arcuate surface 23 is in close contact with the sheath 112 of the third single core wire 103 to match the outer circumferential shape of the third single core wire 103. In other words, the first radius R1 indicating the radius of each of the first arcuate surface 21, the second arcuate surface 22, and the third arcuate surface 23 is set to match the outer circumferential radius of the first single core wire 101, etc. The first radius R1 is defined as a radius around a center point set on a reference radius R centered on the central axis AX. The fourth arc surface 24 closely contacts the sheath 121 of the earth wire 104 in accordance with the outer circumferential shape of the earth wire 104. A third radius R3 indicating the radius of the fourth arc surface 24 is set in accordance with the outer circumferential radius of the earth wire 104. The third radius R3 may be set such that an imaginary circle drawn by the third radius R3 is tangent to an imaginary circle drawn by the first radius R1 and centered on the central axis AX.

[0024] Similarly, as shown in FIG. 2A, the inner peripheral surface 20 includes two first curved surface portions 25 and two second curved surface portions 26. The first curved surface portion 25 is a convex portion defined by a second radius R2. One of the first curved surface portions 25 is located between the first arc surface 21 and the second arc surface 22, and smoothly connects these arc surfaces. The other of the first curved surface portions 25 is located between the second arc surface 22 and the third arc surface 23, and smoothly connects these arc surfaces. The second curved surface portion 26 is a convex portion defined by a fourth radius R4. One of the second curved surface portions 26 is located between the first arc surface 21 and the fourth arc surface 24, and smoothly connects these arc surfaces. The other of the second curved surface portions 26 is located between the third arc surface 23 and the fourth arc surface 24, and smoothly connects these arc surfaces. It is desirable that the second radius R2 and the fourth radius R4 be set to smaller values ​​so that the contact area between the first arcuate surface 21, the second arcuate surface 22, the third arcuate surface 23 or the fourth arcuate surface 24 and its respective contact object, the sheath 112 or the sheath 121, is larger.

[0025] When the inner circumferential surface 20 has the above-mentioned shape, the thinnest portion between the outer circumferential surface 10 and the inner circumferential surface 20 is located at a position furthest from the central axis AX in a part of the first arcuate surface 21, the second arcuate surface 22, or the third arcuate surface 23, and is represented by a thickness T. One of these thinnest portions has a cut portion 5a that penetrates between the outer circumferential surface 10 and the inner circumferential surface 20 over the entire Z direction, which is the axial direction. In the present embodiment, as an example, the cut portion 5a is provided in a part of the first arcuate surface 21.

[0026] In addition, in the wire net 2 that accommodates the terminal portion 100a of the cable 100, a total of three regions, a first region 2a, a second region 2b, and a third region 2c, are set along the Z direction as shown in FIG. 1. The first region 2a is the region that is closest to the fixing portion 3 and accommodates and protects the tip of the terminal portion 100a. The first region 2a may also be called a "cap portion." The third region 2c is the region that is closest to the open end of the wire net 2 and is finally tightened and fixed by the band 4. The second region 2b is located between the first region 2a and the third region 2c, and is the region where the spacer 5 is arranged. In the second region 2b, the spacer 5 is sandwiched between the wire net 2 and a part of the terminal portion 100a arranged on the inner circumferential surface 20 side.

[0027] Here, the dimensions of each part of the spacer 5 and the number of the spacers 5 will be illustrated more specifically.

[0028] As a first example of the cable 100, the rated voltage is set to 600 [V], and the cable diameter of the triplex cable is set to 22 [mm 2 ], and the cable diameter of the earth wire 104 is 14 [mm 2

[0046] or less. In a spacer 5 compatible with the cable 100 according to the first example, the outer diameter D may be set to 26 [mm] and the width W may be set to 50 [mm]. In addition, the reference radius R may be set to 6.05 [mm], the first radius R1 to 5.25 [mm], the second radius R2 to 3 [mm], the third radius R3 to 3.75 [mm], the fourth radius R4 to 2 [mm], and the thickness T of the thinnest part to 1.5 [mm].

[0029] In the wire net 2 attached to the cable 100 according to the first example, the length in the Z direction may be set such that the length of the first region 2a is 105 mm, and the length of the third region 2c is 75 mm. In this case, the length of the second region 2b, which is the region in which the spacers 5 are arranged, may be set to about 100 mm. Thus, two spacers 5 having the above-mentioned dimensions may be installed side by side along the Z direction within the range of the second region 2b, as shown in FIG.

[0030] On the other hand, as a second example of the cable 100, the rated voltage is set to 600 [V] and the cable diameter of the triplex cable is set to 60 [mm 2 ], and the cable diameter of the earth wire 104 is 22 [mm 2

[0046] or less. In a spacer 5 compatible with the cable 100 according to the second example, the outer diameter D may be set to 35.5 [mm] and the width W may be set to 50 [mm]. In addition, the reference radius R may be set to 8.65 [mm], the first radius R1 to 7.5 [mm], the second radius R2 to 4 [mm], the third radius R3 to 4.5 [mm], the fourth radius R4 to 2 [mm], and the thickness T of the thinnest part to 1.5 [mm].

[0031] In the wire net 2 attached to the cable 100 according to the second example, the length in the Z direction may be set to 145 mm for the first region 2a and 75 mm for the third region 2c. In this case, the length of the second region 2b, which is the region where the spacer 5 is arranged, may be set to about 60 mm. Thus, one spacer 5 having the above-mentioned dimensions may be installed within the range of the second region 2b.

[0032] In this way, the number of spacers 5 to be provided is determined based on the relationship between the width W of the spacers 5 and the length of the second region 2b. For example, the width W or the number of spacers 5 to be provided may be set so that the proportion of the spacers 5 within the length range of the second region 2b is about 80%.

[0033] Furthermore, the material of the spacer 5 may be rubber such as chloroprene rubber. The type of rubber is not particularly limited, but it is preferable that the wire net 2 is easily embedded in the outer peripheral surface 10 and that the inner peripheral surface 20 is easily attached to the sheath 112 of the terminal portion 100a of the cable 100, as described later.

[0034] Next, a method for attaching the cable grip 1 to the terminal portion 100a of the cable 100 will be described.

[0035] First, the worker attaches a necessary number of spacers 5 to the terminal portion 100a of the cable 100 so that the spacers 5 are located in the second region 2b when the terminal portion 100a of the cable 100 is accommodated in the wire net 2. At this time, the worker opens the cut portion 5a of the spacer 5, which is an elastic member, and inserts the terminal portion 100a from the side, thereby allowing a part of the terminal portion 100a to be accommodated on the inner peripheral surface 20 side of the spacer 5. Here, since multiple single-core wires such as the first single-core wire 101 are twisted even in the terminal portion 100a, the worker appropriately untwists the multiple single-core wires and attaches the spacer 5 when they are approximately parallel to each other. Note that even if the cut portion 5a is not formed in the spacer 5, for example, the spacer 5 may be attached by inserting the tip of the terminal portion 100a into a through hole surrounded by the inner peripheral surface 20.

[0036] Next, the worker places the terminal portion 100a with the spacer 5 attached in the wire net 2. As a result, the spacer 5 is disposed in the second region 2b and is maintained in a state sandwiched between the terminal portion 100a and the wire net 2.

[0037] Then, the worker wraps the band 4 around a part of the third region 2c of the wire net 2 from the outer periphery side, and tightens the wire net 2 on the terminal portion 100a side. The worker may prevent the band 4 from falling off the third region 2c by wrapping the adhesive tape 6 around the entire third region 2c around which the band 4 is wrapped. With the above steps, the attachment of the cable grip 1 to the terminal portion 100a is completed.

[0038] Next, the function and effect of the spacer 5 will be described.

[0039] The spacer 5 is used when the cable grip 1 is attached to the terminal portion 100a of the cable 100 in which a plurality of single-core wires are twisted together. The spacer 5 is a cylindrical elastic member having an outer peripheral surface 10 having a circular shape in a cross section perpendicular to the axial direction, and an inner peripheral surface 20 whose cross section shape is defined to follow the overall shape of the outer periphery of the terminal portion 100a. The spacer 5 is sandwiched between a part of the terminal portion 100a arranged on the inner peripheral surface 20 side and the wire net 2 included in the cable grip 1 and containing the terminal portion 100a. At least a part of the spacer 5 is arranged on the tip side of the cable grip 1 relative to the band 4 that fastens the wire net 2 to the terminal portion 100a.

[0040] In this embodiment, the cable 100 is a triplex cable in which the multiple single core wires are three CV cables twisted together: a first single core wire 101, a second single core wire 102, and a third single core wire 103. The axial direction of the spacer 5 corresponds to the Z direction in the above example. In this case, the cross section perpendicular to the axial direction corresponds to the XY plane.

[0041] First, the spacer 5 is held by the cable grip 1 so as to be sandwiched between the terminal portion 100a and the wire net 2. Therefore, when the cable grip 1 attached to the terminal portion 100a is pulled during wiring work of the cable 100, a part of the wire net 2 transmits a holding force to the terminal portion 100a via the spacer 5.

[0042] Here, in the spacer 5, the shape of the inner peripheral surface 20 is specified so that the cross-sectional shape follows the shape of the entire outer circumference of the terminal portion 100a. Therefore, the part of the terminal portion 100a in contact with the spacer 5 is accommodated on the inner peripheral surface 20 side of the spacer 5 over its entire circumference, and is not exposed to the wire net 2 side. Therefore, when a holding force is applied to the terminal portion 100a from the wire net 2, excessive force is less likely to be applied to the sheath 112 of each single-core wire in the terminal portion 100a than when the spacer 5 is not used. In other words, the spacer 5 functions as a protective member that prevents damage to the sheath 112, and as a result, the occurrence of short circuits can be reduced.

[0043] In addition, since the spacer 5 accommodates the terminal portion 100a on the inner circumferential surface 20 side, the contact area of ​​the spacer 5 with the terminal portion 100a is increased compared to when the spacer 5 is not used. For example, when the spacer 5 is not used, the wire net 2 contacts only a part of the terminal portion 100a corresponding to the apex of each single core wire protruding outward in the cross section of the cable 100 over the entire axial direction of the terminal portion 100a. In contrast, in the spacer 5 according to the present embodiment, the inner circumferential surface 20 contacts almost the entire outer periphery of the terminal portion 100a. In addition, since the spacer 5 is an elastic member, it has high adhesion to both the sheath 112 of the terminal portion 100a and the wire net 2. Therefore, the spacer 5 makes it easier to transmit the holding force from the wire net 2 to the terminal portion 100a compared to when the spacer 5 is not used, and as a result, it is possible to prevent the cable 100 from coming off the cable grip 1.

[0044] Furthermore, the spacer 5 is cylindrical with the outer peripheral surface 10 and the inner peripheral surface 20 defined by the above-mentioned shape, that is, is an integral body. Therefore, according to the spacer 5, when an operator handles the spacer 5, the spacer 5 can be held by itself at the terminal portion 100a, thereby improving workability.

[0045] As described above, according to the present embodiment, it is possible to provide the spacer 5 that is easy to handle and prevents damage to the cable 100 to which it is attached.

[0046] As illustrated in FIG. 1, the cable 100 may be provided with branched parts such as the first branched part 101a. If the spacer 5 is not used, for example, one of the branched parts may get caught on something during wiring work using the cable grip 1, causing stress to concentrate on the band 4, which may result in the band 4 being displaced toward the fixed part 3. In contrast, the spacer 5 is formed in a cylindrical shape as described above, so that the outer diameter D of the spacer 5 is substantially equal to or larger than the outer diameter of the band 4 in the fastened state. Therefore, the spacer 5 can prevent the band 4 from being displaced toward the fixed part 3 due to an unexpected event.

[0047] In the spacer 5, the cable 100 may include a ground wire 104 in addition to the multiple single-core wires. In the spacer 5, the shape of the inner circumferential surface 20 may follow the shape of the entire outer periphery of the terminal portion 100a including the ground wire 104.

[0048] For example, assume that a spacer consisting of a set of multiple members is used instead of the spacer 5 according to this embodiment. In this case, each spacer is expected to be placed between two adjacent single-core wires, but if the cable to which the spacer is to be attached includes a ground wire, the spacer cannot be placed in the adjacent portion of the ground wire, which may cause unevenness in the transmission of the holding force. In contrast, the spacer 5 according to this embodiment can be applied to a cable 100 that includes a ground wire 104 in addition to multiple single-core wires without causing unevenness in the transmission of the holding force.

[0049] Furthermore, the spacer 5 may have a cut portion 5a penetrating from the outer peripheral surface 10 to the inner peripheral surface 20 over the entire axial direction.

[0050] With this spacer 5, when attaching it to the terminal portion 100a of the cable 100, the worker can attach it from the side of the terminal portion 100a by deforming the spacer 5 to open the notch portion 5a, thereby improving workability.

[0051] Furthermore, in the spacer 5, the outer peripheral surface 10 may have grooves 11 formed in a lattice pattern.

[0052] According to the spacer 5, when the cable grip 1 is pulled during wiring work of the cable 100, the mesh-like wire net 2 is easily caught in the lattice-like groove portion 11. Therefore, it is possible to more easily transmit the holding force or more easily prevent the cable 100 from coming loose.

[0053] Although one embodiment has been described above, the embodiment is not limited to this, and various modifications are possible within the scope of the gist of the embodiment.

[0054] For example, in the above description, the cable 100 to which the spacer 5 is attached is a triplex cable in which three CV cables are twisted together and one earth wire is also provided. However, the applicable cable 100 is not limited to a triplex cable.

[0055] Fig. 4A is a front view of a spacer 15 according to a first modified example. In Fig. 4A, the spacer 15 is drawn based on the spacer 5 shown in Fig. 2A. The cable to which the spacer 15 is applied is a duplex cable (not shown) in which two CV cables are twisted together with one earth wire. Here, based on the configuration of the cable 100, the cable to which the spacer 15 is applied includes a first single-core wire 101, a second single-core wire 102, and an earth wire 104.

[0056] The spacer 15 has an outer peripheral surface 30 and an inner peripheral surface 40. The shape of the outer peripheral surface 30 is the same as the shape of the outer peripheral surface 10 of the spacer 5. The spacer 15 also has a cut portion 15a similar to the cut portion 5a of the spacer 5.

[0057] The inner circumferential surface 40 includes a first arcuate surface 41, a second arcuate surface 42, and a third arcuate surface 43. The first arcuate surface 41 matches the outer circumferential shape of the first single core wire 101 and is in close contact with the sheath 112 of the first single core wire 101. The second arcuate surface 42 faces the first arcuate surface 41 in the Y direction and matches the outer circumferential shape of the second single core wire 102 and is in close contact with the sheath 112 of the second single core wire 102. The third arcuate surface 43 matches the outer circumferential shape of the ground wire 104 and is in close contact with the sheath 121 of the ground wire 104.

[0058] In this case, the inner circumferential surface 40 includes one first curved surface portion 44 and two second curved surface portions 45. In the inner circumferential surface 40, there are two positions between the first arc surface 41 and the second arc surface 42 so as to face each other in the X direction. First, at one position between the first arc surface 41 and the second arc surface 42, there is a first curved surface portion 44 which is a convex portion, and these arc surfaces are smoothly connected to each other. At the other position between the first arc surface 41 and the second arc surface 42, there is a third arc surface 43. In addition, one second curved surface portion 45 is located between the first arc surface 41 and the third arc surface 43, and these arc surfaces are smoothly connected to each other. The other second curved surface portion 45 is located between the second arc surface 42 and the third arc surface 43, and these arc surfaces are smoothly connected to each other.

[0059] Such a spacer 15 provides the same effect as the spacer 5, even when the cable to which it is applied is a duplex cable.

[0060] Fig. 4B is a front view of a spacer 16 according to a second modified example. In Fig. 4B, the spacer 16 is drawn based on the spacer 5 shown in Fig. 2A. Although not shown, the cable to which the spacer 16 is applied is a quadraplex cable in which four CV cables are twisted together with one earth wire. Here, based on the configuration of the cable 100, the cable to which the spacer 16 is applied includes a first single-core wire 101, a second single-core wire 102, a third single-core wire 103, a fourth single-core wire 105, and an earth wire 104.

[0061] Spacer 16 has an outer peripheral surface 50 and an inner peripheral surface 60. The shape of outer peripheral surface 50 is the same as the shape of outer peripheral surface 10 of spacer 5. Spacer 16 also has cut portions 25a similar to cut portions 5a of spacer 5.

[0062] The inner circumferential surface 60 includes a first arcuate surface 61, a second arcuate surface 62, a third arcuate surface 63, a fourth arcuate surface 64, and a fifth arcuate surface 65. The first arcuate surface 61 is in close contact with the sheath 112 of the first single core wire 101 to match the outer circumferential shape of the first single core wire 101. The second arcuate surface 62 is in close contact with the sheath 112 of the second single core wire 102 to match the outer circumferential shape of the second single core wire 102. The third arcuate surface 63 is in close contact with the sheath 112 of the third single core wire 103 to match the outer circumferential shape of the third single core wire 103. The fourth arcuate surface 64 is in close contact with the sheath 112 of the fourth single core wire 105 to match the outer circumferential shape of the fourth single core wire 105. The fifth arcuate surface 65 fits the outer circumferential shape of the ground wire 104 and comes into close contact with the sheath 121 of the ground wire 104 .

[0063] In this case, the inner peripheral surface 60 includes three first curved surface portions 66 and two second curved surface portions 67. The first of the first curved surface portions 66 is a convex portion located between the first arc surface 61 and the second arc surface 62, and smoothly connects these arc surfaces. The second of the first curved surface portions 66 is a convex portion located between the second arc surface 62 and the third arc surface 63, and smoothly connects these arc surfaces. The third of the first curved surface portions 66 is a convex portion located between the third arc surface 63 and the fourth arc surface 64, and smoothly connects these arc surfaces. The second curved surface portion 67 is located between the first arc surface 61 and the fifth arc surface 65, and smoothly connects these arc surfaces. The other second curved surface portion 67 is located between the fourth arcuate surface 64 and the fifth arcuate surface 65, and smoothly connects these arcuate surfaces.

[0064] Here, if the cable to which the spacer 16 is applied does not include the earth wire 104, the first arcuate surface 61 and the third arcuate surface 63 may face each other in the Y direction, and the second arcuate surface 62 and the fourth arcuate surface 64 may face each other in the X direction. On the other hand, as shown in Fig. 4B, if the cable to which the spacer 16 is applied includes the earth wire 104, the distance between the first arcuate surface 61 and the fourth arcuate surface 64 may be made wider than the distance between the first arcuate surface 61 and the second arcuate surface 62 in order to ensure an adjacent area for the fifth arcuate surface 65.

[0065] Such spacer 16 provides the same effect as spacer 5, even when the cable to which it is applied is a quadraplex cable.

[0066] Further, in the above description, the spacer 5 is disposed in the second region 2b of the wire net 2. However, the shape or the arrangement of the spacer 5 is not limited to this.

[0067] 5 is a perspective view of a spacer 17 according to a third modified example. The spacer 17 is a cylindrical elastic member similar to the spacer 5, but the length of the spacer 17 in the axial direction corresponding to the Z direction is set to be longer than that of the spacer 5.

[0068] The spacer 17 has an outer peripheral surface 70 and an inner peripheral surface (not shown). The outer peripheral surface 70 has a groove portion 71 similar to the groove portion 11 formed in the outer peripheral surface 10 of the spacer 5. The cross-sectional shape of the inner peripheral surface is the same as the cross-sectional shape of the inner peripheral surface 20 of the spacer 5. The spacer 17 also has a cut portion 35a similar to the cut portion 5a of the spacer 5.

[0069] The axial length of the spacer 17 is set so that a part of the spacer 17 is disposed in the second region 2b and the remaining part is disposed in the third region 2c when the terminal portion 100a of the cable 100 is housed in the wire net 2. The spacer 17 has an annular recess 72 that tightens the band 4 in a portion that is disposed in the third region 2c when the spacer 17 is attached to the terminal portion 100a. The width of the annular recess 72 in the Z direction is wider than the width of the band 4.

[0070] Thus, in the spacer 17, the outer peripheral surface 70 may have an annular recess 72 against which the band 4 is clamped.

[0071] According to this spacer 17, when the cable grip 1 is attached to the terminal portion 100a, a part of the spacer 17 is fastened to the terminal portion 100a by the band 4. Therefore, the holding force from the wire net 2 can be more easily transmitted to the terminal portion 100a, and the cable 100 can be more effectively prevented from coming loose from the cable grip 1.

[0072] 6 is a top view of a spacer 5 according to a fourth modified example. Thus, in the spacer 5, the inner circumferential surface 20 may have at least one annular groove portion 27 formed along the inner circumference. In the example of FIG. 6, two annular groove portions 27 are formed on the inner circumferential surface 20 at a constant interval along the axial direction corresponding to the Z direction.

[0073] According to this spacer 5, when the cable grip 1 is attached to the terminal portion 100a, at least one annular groove portion 27 functions as an anti-slip device, thereby further preventing the cable 100 from coming loose from the cable grip 1. [Explanation of symbols]

[0074] 1 Cable Grip 2 Wire net 4 Bands 5,15,16,17 Cable grip spacer (spacer) 5a, 15a, 25a, 35a Cutout 10,30,50 Outer surface 11,71 Groove 20,40,60 Inner surface 27 Annular groove 72 Circular recess 100 Cable 100a Terminal part 101 1st single core wire 102 2nd single core wire 103 3rd single core wire 104 Earth Wire

Claims

1. A cable grip spacer used when a cable grip is attached to an end of a cable having a plurality of single-core wires twisted together, comprising: a cylindrical elastic member having an outer circumferential surface having a circular cross-sectional shape perpendicular to an axial direction, and an inner circumferential surface having a cross-sectional shape defined to follow the overall shape of the outer periphery of the terminal portion, The cable grip is provided with a wire mesh that is sandwiched between a part of the terminal portion disposed on the inner circumferential surface side and the wire mesh that is included in the cable grip and that houses the terminal portion. A cable grip spacer, at least a portion of which is positioned on the tip side of the cable grip relative to a band that tightens the wire net against the terminal portion.

2. The cable includes a ground wire in addition to the plurality of single-core wires, 2. The cable grip spacer according to claim 1, wherein the shape of the inner peripheral surface conforms to the shape of the entire outer periphery of the terminal portion including the earth wire.

3. 3. The cable grip spacer according to claim 1, further comprising a notch extending from the inner peripheral surface to the outer peripheral surface over the entire axial direction.

4. 3. The cable grip spacer according to claim 1, wherein the outer peripheral surface has grooves formed in a lattice pattern.

5. 3. A cable grip spacer as claimed in claim 1 or 2, wherein the outer peripheral surface has an annular recess into which the band is clamped.

6. 3. The cable grip spacer of claim 1 or 2, wherein the inner circumferential surface has at least one annular groove formed along the inner circumference.

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