JP6537273B2 - Cable covering device, method of covering cable end, and method of covering cable connection - Google Patents

Description

  The present invention relates to a cable covering, a method of covering a cable end, and a method of covering a cable connection.

  In the past, cable jackets for coating the end portion of a power cable are known. Generally, a power cable has a conductor, an insulator, a semiconductive layer, a shielding layer, and a cable sheath in order in the radial direction. In the conventional cable sheathing tool, as shown in Patent Document 1, in order from the tip, the conductor, the insulator, the semiconductive layer, and the exposed shielding layer in the power cable processed to expose the shielding layer are previously grounded. It is necessary to attach a grounding member such as a clamp, and the covering operation is complicated. Therefore, there has been a demand for improvement in on-site operability in the relevant technical field.

  Then, the terminal processing member shown, for example in patent documents 2 is proposed. In this terminal processing member, since the ground contact member is inserted into the recess provided inside the terminal processing member, there is no need to attach the ground contact member to the shielding layer in advance, and the workability is improved.

Unexamined-Japanese-Patent No. 2000-32645 Japanese Utility Model Publication No. 60-44427

  However, in the end processing member disclosed in Patent Document 2, there is a possibility that the shielding layer of the inserted power cable and the grounding member may not be in good contact with each other, and there is room for further improvement.

  An object of the present invention is to provide a cable sheathing device in which the stability of the connection between the shielding layer of the power cable and the grounding member is improved while the workability in the field is improved.

  A cable covering according to an aspect of the present invention is a cable covering for covering an end or a connection of a power cable, wherein the cable covering has conductivity, and at least at the time of covering the power cable, a shielding layer of the power cable. A holding member which covers in the circumferential direction and is constituted by a contact member electrically connected to the shielding layer and a curved plate having conductivity and holds the contact member from the outer peripheral side, and covers the holding member from the outer peripheral side And a ground wire connected to the holding member and extending to the outside of the elastic jacket.

  In the cable covering device according to another aspect, the contact member has a cylindrical shape, and the region on the central side in the axial direction is curved radially inward relative to the both ends in the axial direction, and the contact member is A plurality of elongated holes extending in the axial direction may be formed in the circumferential direction, and the holding member may press the contact member at least when the power cable is covered.

  In another form of cable jacket, at least a portion of the ground wire may be embedded in the elastic jacket.

  In a cable covering according to another form, at least a part of the ground wire may be surrounded by a waterproof member inside the elastic jacket.

  In the cable covering device according to another aspect, the waterproof member may be a putty material.

  In the cable covering device according to another aspect, the contact member is cylindrical, and a slit extending from one end to the other end in the axial direction is formed at a predetermined position in the circumferential direction of the contact member, in an unloaded state The holding member may cover the slit and overlap at least a part of the contact member, and the ground line may be connected to a position overlapping the contact member in the holding member.

  In the cable covering device according to another embodiment, the elastic jacket is a cold-shrinkable tube, and the diameter of the elastic jacket is increased by the diameter-expanding member disposed inside, and the contact member and the holding member are the elastic jacket and the diameter-expanding member. It may be disposed between.

  In the cable covering device according to another aspect, the holding member may be provided with an extension member extending from a circumferential end of the holding member.

  In the cable covering device according to another aspect, the portion of the grounding wire extending to the outside of the elastic jacket is covered by the covering member, and at least a part of the covering member is peelable from the grounding wire. Good.

  The method of covering a cable end according to an aspect of the present invention includes the steps of processing the covering of the end of the power cable, inserting the power cable having the covering of the end processed into the above-mentioned cable covering, and Fixing the compression terminal to the inserted power cable and attaching a ground wire to the ground wire.

  According to another aspect of the present invention, there is provided a method of covering a cable end portion, the step of processing the covering of the end portion of the power cable, inserting the power cable having the end covering treated in the above-mentioned cable covering provided with the diameter expanding member. Removing the diameter expanding member and contracting the elastic sheath in a state where the power cable is positioned in the cable covering, fixing the compression terminal to the power cable, and attaching the grounding wire to the grounding wire Have.

  In the method of covering a cable connection according to an aspect of the present invention, a process of processing a cover of an end of two power cables, a process of covering the end of the above-described cable covering provided with a diameter expansion member Inserting the power cable, connecting the other end of the cable to the other end of the power cable treated with the connecting member, and expanding the diameter of the two power cables connected in the cable covering. The steps of removing the member and contracting the elastic sheath, and attaching the grounding wire to the grounding wire are included.

  According to the present invention, it is possible to provide a cable sheathing device in which the stability of the connection between the shielding layer of the power cable and the grounding member is improved while the workability in the field is improved.

FIG. 1 is a perspective view of a cable jacket and a power cable according to one embodiment. It is a longitudinal cross-sectional view of the cable coating tool which concerns on one Embodiment. It is a disassembled perspective view which shows the earthing | grounding part in the cable coating tool which concerns on one Embodiment. It is a side view of the earthing part in the cable covering tool concerning one embodiment. It is a longitudinal cross-sectional view of the cable coating tool which concerns on one Embodiment, and is a figure which shows the state in which the power cable was inserted. It is a longitudinal cross-sectional view of the cable coating tool which concerns on other embodiment. It is a disassembled perspective view which shows the earthing | grounding part in the cable coating tool which concerns on other embodiment. It is a side view of the earthing part in the cable covering tool concerning other embodiments. It is a longitudinal cross-sectional view of the cable coating tool which concerns on other embodiment. It is a longitudinal cross-sectional view of the cable coating tool which concerns on other embodiment.

  A cable covering according to an aspect of the present invention is a cable covering for covering an end or a connection of a power cable, wherein the cable covering has conductivity, and at least at the time of covering the power cable, a shielding layer of the power cable. A holding member which covers in the circumferential direction and is constituted by a contact member electrically connected to the shielding layer and a curved plate having conductivity and holds the contact member from the outer peripheral side, and covers the holding member from the outer peripheral side And a ground wire connected to the holding member and extending to the outside of the elastic jacket.

  According to such a configuration, by providing the contact member that covers the shielding layer in the circumferential direction, the shielding layer and the contact member are electrically connected, and by providing the holding member that holds the contact member from the outer peripheral side, The contact member and the holding member are electrically connected. Under the present circumstances, since the holding member is comprised with the curved board, it can be hold | maintained so that the outer periphery of a contact member may be covered. Furthermore, the contact member and the holding member are covered by the elastic jacket provided on the outer peripheral side of the holding member, thereby improving the stability of the connection between the shielding layer of the power cable and the grounding member. In addition, since the grounding portion is integrally incorporated in the cable covering tool, there is no need to separately attach a grounding member such as a grounding clamp to the shielding layer of the power cable before the cable covering tool attaching process, and work on the site Improves the quality.

  Hereinafter, embodiments according to the present invention will be specifically described with reference to the drawings. For the sake of convenience, substantially the same elements may be denoted by the same reference numerals, and the description thereof may be omitted.

First Embodiment
FIG. 1 is a perspective view showing a cable covering 1A and a power cable 100. FIG. FIG. 2 is a longitudinal cross-sectional view of the cable covering 1A. As shown in FIG. 1, the cable jacket 1A is a member attached to the end of the power cable 100, and covers the end of the power cable 100 by inserting the power cable 100 inside. The power cable 100 includes a conductor 101, an insulator 102, a semiconductive layer 103, a shielding layer 104, and a cable sheath 105. The insulator 102 is made of an insulating resin or the like, and covers the outer peripheral surface of the conductor 101. The semiconductive layer 103 is made of, for example, conductive polyethylene or the like, has semiconductivity, and covers the outer peripheral surface of the insulator 102. The shielding layer 104 covers the outer peripheral surface of the semiconductive layer 103. The cable sheath 105 covers the outer circumferential surface of the shielding layer 104.

  As shown in FIG. 2, the cable covering device 1A includes an outer cover tube (elastic outer cover) 10A and a grounding portion 30A disposed inside the outer cover tube 10A. The envelope tube 10A is a cylindrical elastic body, and is made of, for example, a resin such as silicone rubber or EPDM. An opening 11a for connecting a compression terminal 20, which will be described later, is formed at the tip 11 of the jacket tube 10A. An electric field relaxation member (high dielectric constant layer) 13 is provided in a substantially central portion in the axial direction on the inner side of the jacket tube 10A. The electric field relaxation member 13 has a cylindrical shape, and forms a part of the inner circumferential surface of the jacket tube 10A. In the envelope tube 10A, a step 15 for disposing the grounding portion 30A is formed at a position closer to the rear end 12 than the position at which the electric field relaxation member 13 is disposed. Further, the stepped portion 15 is formed with a communicating portion 16 through which a grounding wire 51 described later passes. The communication portion 16 is formed along the axial direction of the jacket tube 10A so as to penetrate the inside and outside of the jacket tube 10A, and communicates from the step 15 to the axial rear end 12 of the jacket tube 10A. ing. In the vicinity of the opening 12a of the rear end 12 of the jacket tube 10A, an O-ring 17 formed integrally with the jacket tube 10A is provided. In the illustrated example, a plurality of (here, two) O-rings 17 are provided in the axial direction. The inner diameter of the O-ring portion 17 is smaller than the outer diameter of the cable sheath 105 of the power cable 100. Therefore, when the cable sheath 105 of the power cable 100 is inserted at the position of the O-ring portion 17, the O-ring portion 17 and the cable sheath 105 are in close contact with each other, and the waterproofness of this portion is secured.

  FIG. 3 is an exploded perspective view showing the grounding portion 30A. FIG. 4 is a side view of the grounding portion 30A viewed from the tip end side in the axial direction. As shown in FIGS. 3 and 4, the grounding portion 30A has a contact member 31, a holding member 41 and a grounding wire 51. The contact member 31 is a member that contacts the shielding layer 104 of the power cable 100 in a state where the power cable 100 is covered by the cable covering 1A. Since the contact member 31 has conductivity, the contact member 31 is electrically connected to the shield layer 104 by contacting the shield layer 104.

  The contact member 31 has a substantially cylindrical shape curved along the shielding layer 104 so as to cover the shielding layer 104 of the power cable 100 in the circumferential direction. At a predetermined position in the circumferential direction of the contact member 31, a slit 32 extending from one end to the other end in the axial direction is formed. Therefore, the contact member 31 is C-shaped when viewed from the axial direction.

  In the contact member 31, a plurality of elongated holes 33 extending along the axial direction are formed at equal intervals in the circumferential direction. Thereby, in the contact member 31, a plurality of strip portions 35 extending in the axial direction are formed at equal intervals in the circumferential direction. The plurality of strip portions 35 are connected to each other by C-shaped ring portions 36 at both axial ends. A region on the central side in the axial direction of the strip portion 35 is curved radially inward as compared to both ends in the axial direction. That is, the inner diameter of the contact member 31 gradually decreases from the two axial ends toward the center. In the contact member 31, in the no-load state where no external force is applied, the central region in the axial direction has an inner diameter smaller than the outer diameter of the shielding layer 104 of the power cable 100. The contact member 31 is formed of a conductive material for a thin plate spring, and has a predetermined elasticity. The contact member 31 in the present embodiment is formed of, for example, beryllium copper (JIS C1720), but other materials such as phosphor bronze, brass, and bronze may be used as long as they function as a spring material. In the illustrated example, the long holes 33 formed in the contact member 31 are equally spaced in the circumferential direction, but the distance between the long holes may not be equal.

  The holding member 41 covers the contact member 31 from the outer peripheral side, and holds the contact member 31 by being bonded to the contact member 31. The holding member 41 is formed of a plate curved along the outer periphery of the contact member 31 and has a substantially cylindrical shape. At a predetermined position in the circumferential direction of the holding member 41, a slit 42 extending from one end to the other end in the axial direction is formed. Therefore, the holding member 41 has a C shape when viewed from the axial direction.

  The holding member 41 is formed of a conductive material for a thin plate spring, and has a predetermined elasticity. The holding member 41 in the present embodiment is formed of, for example, phosphor bronze (JIS C5210), but another material such as brass or bronze may be used as long as it functions as a spring material. The inner diameter of the holding member 41 is smaller than the outer diameter of the contact member 31 in the state of being attached to the shielding layer 104 in the unloaded state.

  The contact member 31 and the holding member 41 covering the contact member 31 are arranged in such a manner that the slits 32 of the contact member 31 and the slits 42 of the holding member 41 do not overlap in a non-loaded state. Thus, one end 41 a side of the holding member 41 in the circumferential direction is joined. In the present embodiment, through holes 43 used for solder bonding are respectively formed at both ends in the axial direction on one end 41 a side of the holding member 41 in the circumferential direction. In the state where the holding member 41 covers the contact member 31, a part of the contact member 31 extends to the holding member 41 via the through hole 43. Therefore, the holding member 41 and the contact member 31 can be soldered to each other through the through hole 43. In the joined state, the slit 42 of the holding member 41 and the slit 32 of the contact member 31 are located on substantially opposite sides in the circumferential direction. Thus, the holding member 41 covers the slit 32 of the contact member 31 and overlaps the contact member 31 in the radial direction at a portion not overlapping the slit 32. In the solder bonding of the contact member 31 and the holding member 41, not only the form via the through hole 43 but also the one end 41a of the holding member 41 may be directly soldered to the contact member 31.

  Further, as described above, the holding member 41 and the contact member 31 are joined at the one end 41 a side in the circumferential direction, so that the other end 41 b side in the circumferential direction of the holding member 41 and the contact member 31 can slide mutually. There is. Therefore, when the diameter of the holding member 41 is reduced by the application of an external force, the holding member 41 and the contact member 31 slide so as to decrease the diameter of the contact member 31 in conjunction with this. When the diameter of the contact member 31 is increased by the application of an external force, the holding member 41 and the contact member 31 slide so as to increase the diameter of the holding member 41 in conjunction with this.

  The ground line 51 is connected to the outer peripheral surface of the holding member 41. In the present embodiment, the grounding wire 51 is connected to a position where the holding member 41 and the contact member 31 overlap, and is grounded in the vicinity of the end on the one end 41 a side where the through hole 43 is formed in the holding member 41. Wires 51 are soldered. One end of the ground wire 51 is bent 180 degrees, and this portion is a connection portion 53 connected to the holding member 41. Thus, the ground wire 51 is firmly connected to the holding member 41. In the illustrated example, the ground line is bent at two places, but since this is in accordance with the shape of the communication portion 16, the shape of the ground line 51 is not particularly limited.

  As shown in FIG. 2, the grounding portion 30 </ b> A having the above-described configuration is disposed at a step 15 formed inside the jacket tube 10 </ b> A. In this state, the outer circumferential side of the holding member 41 is covered by the jacket tube 10A. The axial movement of the ground portion 30A in the jacket tube 10A is limited by the step 15. At least a portion of the ground wire 51 is embedded in the jacket tube 10A. In the present embodiment, the grounding wire 51 extends from the axial rear end 12 of the jacket tube 10A to the outside through the communication portion 16 formed in the jacket tube 10A. In the communication portion 16, the ground wire 51 is in close contact with the jacket tube 10A. Thereby, waterproofness around the grounding wire 51 is secured. In the present embodiment, a portion of the ground wire 51 extending outward from the jacket tube 10A is covered by the covering member 55. The covering member 55 is, for example, a resin such as silicone rubber or EPDM similar to the material forming the jacket tube 10A. The covering member 55 is not bonded to at least a part of the distal end side of the ground wire 51 projecting to the outside of the jacket tube, and the part can be easily peeled off. In addition, in FIG.1 and FIG.5, the state from which the covering member 55 peeled is shown.

  The cable covering device 1A having the above-described configuration is manufactured, for example, by integrally molding a silicone resin which is a material of the jacket tube 10A with respect to the ground portion 30A and the electric field relieving member 13 in one or more steps. be able to. In the manufacture, the ground wire 51 and the silicone resin are adhered by applying a primer to the ground wire 51 in advance, so that the ground wire 51 and the jacket tube 10A in the communicating portion 16 are bonded as described above. It will be in close contact. In addition, when the covering member 55 is formed, the primer is not applied to a part of the end portion side of the grounding wire 51, so that the grounding wire 51 and the covering member 55 are not adhered to each other. The covering member 55 can be peeled off.

  Next, a method for covering the power cable 100 using the above-described cable covering tool 1A will be described with reference to FIG. 5 which is a longitudinal sectional view of the cable covering tool 1A in which the power cable 100 is inserted.

  First, as a first step, the covering of the end of the power cable 100 is processed. That is, from the power cable 100 to the insulator 102, the conductor 101, the insulator 102, the semiconductive layer 103, and the shielding layer 104 are exposed in order from the tip of the power cable 100 by a predetermined length. , The semiconductive layer 103, the shielding layer 104, and the cable sheath 105 are peeled off in a step-like manner. This completes the preparation of the power cable 100 in advance.

  Subsequently, in the next step, the power cable 100 with the end covering treated is inserted into the cable covering tool 1A. The power cable 100 is inserted from the opening 12a on the rear end side of the cable covering 1A such that the shielding layer 104 is fitted into the contact member 31 of the grounding portion 30A. Thereby, the shielding layer 104 of the power cable 100 and the ground portion 30A are electrically connected. Further, the electric field relaxation member 13 covers the transition portion between the insulator 102 and the semiconductive layer 103. In this state, the contact member 31 is expanded by the shielding layer 104 so as to increase in diameter. At this time, the shielding layer 104 is held by the contact member 31 by the elastic force of the contact member 31. Then, the contact member 31 is pressed in the direction in which the diameter is reduced by the elastic force of the holding member 41 covering the outer periphery of the contact member 31. Furthermore, the jacket tube 10A also presses the holding member 41 and the contact member 31 in the direction in which the diameter of the contact member 31 decreases.

  In addition, in the state before inserting the termination | terminus part of the power cable 100, grease may be previously apply | coated over a part or substantially whole of the inner surface of 1 A of cable coverings. By applying the grease to the inner surface of the cable covering 1A, the process of inserting the end of the power cable 100 into the inside of the cable covering 1A can be facilitated.

  Subsequently, the compression terminal 20 is inserted from the opening 11a on the front end side of the cable covering device 1A. In the present embodiment, the compression terminal 20 is a member made of metal such as copper and aluminum, and has a cylindrical portion 21 closed at its tip end, and a plate shape extending forward from the tip of the cylindrical portion 21. Section 22 is included. The portion on the rear end side of the cylindrical portion 21 of the compression terminal 20 is accommodated in the opening 11a on the front end side of the cable covering 1A. By inserting the compression terminal 20, the tip of the conductor 101 is inserted into the inner hole of the cylindrical portion 21 of the compression terminal 20. Electrical contact and fixation between the conductor 101 and the compression terminal 20 are secured by pressure bonding or compression of the cylindrical portion 21 of the compression terminal 20.

  Subsequently, the covering member 55 covering the ground wire 51 extending outward from the rear end of the cable covering device 1A is peeled off. The exposed ground wire 51 is grounded by being attached to a predetermined grounding wire.

  Next, the operation and effects of the cable covering according to the present embodiment will be described.

  According to the cable covering device 1A according to the present embodiment, the shielding layer 104 and the contact member 31 are electrically connected by providing the contact member 31 that covers the shielding layer 104 in the circumferential direction. Further, by providing the holding member 41 for holding the contact member 31 from the outer peripheral side, the contact member 31 and the holding member 41 are electrically connected. At this time, the holding member 41 presses the contact member 31 radially inward (that is, the shielding layer 104 side) while holding the outer periphery of the contact member 31 so as to cover the outer periphery. Furthermore, the jacket tube 10A provided on the outer peripheral side of the holding member 41 presses the contact member 31 and the holding member 41 radially inward. Thus, the stability of the connection between the shielding layer 104 of the power cable 100 and the ground portion 30A is further improved by the action of the pressing force of the holding member 41 and the jacket tube 10A. Further, since the ground portion 30A is integrally incorporated in the cable covering tool 1A, there is no need to attach a ground member such as a grounding clamp to the shielding layer 104 of the power cable 100 separately before the cable covering tool 1A is attached. , Improve the on-site work efficiency.

  Further, a strip portion 35 is formed in the contact member 31 by forming a plurality of elongated holes 33 extending along the axial direction in the circumferential direction. A region on the central side in the axial direction of the strip portion 35 is curved radially inward as compared with both ends in the axial direction. The holding member 41 presses the contact member 31 radially inward at least when the power cable 100 is covered. By contacting each of the curved strip portions 35 with the shielding layer 104, the electrical connection between the contact member 31 and the shielding layer 104 is well maintained. Further, when the contact member 31 is pressed by the holding member 41, the contact member 31 and the shielding layer 104 are fitted more strongly.

  Further, since the ground wire 51 is embedded in the jacket tube 10A from the step 15 to the rear end 12 of the jacket tube 10A, waterproofness around the ground wire 51 is secured. By the ground wire 51 being buried from the step 15 to the rear end of the jacket tube 10A, the buried distance becomes long, and the waterproofness is improved.

  Further, the slits 32 formed in the circumferential direction of the contact member 31 are covered by the holding member 41 in a non-loaded state. Further, the ground line 51 is connected to a position overlapping the contact member 31 in the holding member 41. By covering the slits 32 of the contact member 31 with the holding member 41, the mechanical strength of the ground portion 30A is greater than when the slits 32 of the contact member 31 and the slits 42 of the holding member 41 are overlapped. Get higher. Further, the external force tends to be particularly easily applied at the connection position between the ground wire 51 and the holding member 41, but the external force from the ground wire 51 is obtained by connecting the ground wire 51 to the overlapping position between the contact member 31 and the holding member 41 It is easy to maintain the shape of the grounding portion 30A even when the

  Further, a portion of the ground wire 51 extending to the outside of the jacket tube 10A is covered by the covering member 55. Therefore, when the grounding unit 30A does not ground, it can be avoided that the ground wire 51 is exposed. And, since at least a part of the covering member 55 can be peeled off from the ground line 51, for example, even if it is not necessary to ground in the initial plan, it will be easily done later when the need arises. Can perform grounding work.

  Also, conventionally, in the method of covering the end of the power cable 100, after processing the covering of the end of the power cable 100 in advance, a ground clamp is attached to the exposed shielding layer 104, and the relevant part is covered with a covering tool. It was necessary to treat and waterproof the sheath and the transition part of the cable sheath 105 with an adhesive tape.

  According to the method of covering the cable end portion according to the present embodiment, the preparation of the power cable 100 is completed in the step of processing the covering of the end portion of the power cable 100, so the workability at the site is improved.

Second Embodiment
The cable covering tool 1B according to the present embodiment is a member attached to the end of the power cable 100, and by pulling out the core member (diameter enlarging member) 70 in a state where the power cable 100 is disposed inside, the power cable Cover 100 ends. Therefore, the second embodiment is largely different from the first embodiment in that the core member 70 is provided inside the jacket tube. Hereinafter, points different from the first embodiment will be mainly described, and the same elements and members will be denoted by the same reference numerals and detailed description will be omitted.

  As shown in FIG. 6, the cable covering device 1B includes an envelope tube 10B, a grounding portion 30B, and a core member 70. The jacket tube 10B is a cold-shrink tube provided with substantially the same shape as the jacket tube 10 in the first embodiment. That is, the envelope tube 10B has a tubular shape, is provided with the opening 11a at the front end 11, and is provided with the opening 12a at the rear end 12. Further, the envelope tube 10 </ b> B includes the electric field reducing member 13, the stepped portion 15, and the communicating portion 16.

  FIG. 7 is an exploded perspective view showing the grounding portion 30B. FIG. 8 is a side view of the grounding portion 30B as viewed from the tip end in the axial direction. As shown in FIGS. 7 and 8, the grounding portion 30 </ b> B further includes an extending member 61 in addition to the contact member 31, the holding member 41, and the grounding wire 51. The extension member 61 is formed of a plate curved along the outer periphery of the contact member 31 so as to cover at least a part of the contact member 31 from the outer peripheral side. The extension member 61 is joined to the holding member 41 so as to extend from the circumferential end of the holding member 41. In the present embodiment, through holes 63 used for solder bonding are respectively formed at both axial ends of one end 61 a of the extension member 61 in the circumferential direction. The extension member 61 is joined to the holding member 41 so as to cover the slit 42 of the holding member 41. In the illustrated example, the extension member 61 is soldered to the one end 41 a side of the holding member 41 joined to the contact member 31 via the through hole 63. The other end 61 b side of the extension member 61 not joined to the holding member 41 is disposed to cover the outer peripheral surface of the holding member 41. When the diameter of the ground contact portion 30B changes due to the application of an external force, the contact member 31, the holding member 41, and the extension member 61 slide in conjunction with this. In the soldering of the holding member 41 and the extension member 61, not only the form through the through hole 63 but also the one end 61a of the extension member 61 may be directly soldered to the holding member 41.

  The extension member 61 is formed of, for example, phosphor bronze (JIS C5210) in the same manner as the holding member 41, but may be formed thinner than the holding member 41. Further, the extension member 61 does not necessarily have to be conductive, and may be made of a material different from that of the holding member 41, and may be made of, for example, a resin having a predetermined elasticity. Moreover, although the extension member 61 and the holding member 41 showed the example which is another body, you may be integrally comprised. Such a ground portion 30B is disposed in the step 15 as in the first embodiment. Further, the ground line 51 passes through the communication portion 16 formed in the jacket tube 10 and extends from the rear end 12 in the axial direction of the jacket tube 10 to the outside. In the present embodiment, an example in which the covering member 55 is not attached to the ground wire 51 extended to the outside of the jacket tube 10 is shown, but as in the first embodiment, the covering member 55 is attached. It is also good.

  As shown in FIG. 6, the jacket tube 10B provided with the ground portion 30B and the electric field relaxation member 13 is expanded in diameter by the core member 70 and held. The core member 70 is, for example, a cylindrical tubular hollow member having a breaking line 71 formed on the wall surface over the entire length. The disassembly line 71 is provided so as to gradually advance in the axial direction while orbiting or circling and reversing around the axis of the core member 70. In the present embodiment, a continuous spiral groove is provided as the disassembly line 71 so as to gradually advance in the axial direction while circling around the axis of the core member 70. The portion where the continuous spiral groove is formed is thinner than the periphery of the continuous spiral groove and is a portion that is easily broken. Therefore, the core member 70 can be drawn out as a core ribbon which is a string-like body along the continuous spiral groove. As a material of such a core member 70, for example, a resin such as polyethylene or polypropylene is used. In addition, the breaking line 71 is not limited to a spirally formed groove like a continuous spiral groove, and may be formed, for example, in an SZ shape, and may be in any shape as long as it can be drawn out.

  In the present embodiment, in the state where the grounding portion 30B is disposed in the step portion 15, the diameter of the grounding portion 30B and the jacket tube 10B is expanded, and the core member 70 is inserted in that manner. Therefore, in a state where the diameter of the jacket tube 10B is expanded by the core member 70, the ground portion 30B disposed between the jacket tube 10B and the core member 70 is also expanded by the core member 70. The cable covering device 1B is provided with a waterproof member 18 between the jacket tube 10B and the core member 70 at the rear end side of the step portion 15. The waterproof member 18 is, for example, a putty material, and covers the outer periphery of the core member 70 in the entire circumferential direction. The waterproof member 18 may be omitted depending on the application situation.

  Next, a method of covering the power cable 100 using the above-described cable covering device 1A will be described.

  First, as a first step, the covering of the end of the power cable 100 is processed. That is, from the power cable 100 to the insulator 102, the conductor 101, the insulator 102, the semiconductive layer 103, and the shielding layer 104 are exposed in order from the tip of the power cable 100 by a predetermined length. , The semiconductive layer 103, the shielding layer 104, and the cable sheath 105 are peeled off in a step-like manner. This completes the preparation of the power cable 100 in advance.

  Subsequently, in the next step, the power cable 100 in which the coating of the end portion is processed is inserted into the cable coating tool 1B. The power cable 100 is inserted from the opening 12a of the rear end 12 of the cable covering 1B, and positioned so that the axial positions of the shielding layer 104 and the contact member 31 coincide with each other. Then, while keeping this state, the core member 70 is pulled out from the opening 12 a of the rear end 12 of the cable covering device 1 B sequentially from the core ribbon on the tip side through the inside of the core member 70. Thereby, the core member 70 is removed, and the jacket tube 10 provided with the grounding portion 30B and the electric field relaxation member 13 is contracted. Then, the shielding layer 104 of the power cable 100 and the ground portion 30B are electrically connected.

  Subsequently, as in the first embodiment, after the compression terminal 20 is inserted from the opening 11a of the distal end 11 of the cable covering device 1B, the ground wire 51 extending outward from the rear end of the cable covering device 1B is Attached to the ground wire of the

  According to the cable sheathing tool 1B and the sheathing method according to the present embodiment, the power cable 100 can be inserted into the expanded cable sheathing tool 1B as well as the workability at the site is improved. It is possible to prevent the occurrence of damage or the like of the cable covering tool 1B by inserting the connector.

  Further, the holding member 41 is provided with an extension member 61 extending from an end of the holding member 41 in the circumferential direction. As a result, the contact member 31 is pressed not only by the holding member 41 but also by the extension member 61, and the electrical connection between the contact member 31 and the shielding layer 104 is further improved. In addition, even when the diameter of the contact member 31 is increased, mechanical strength is secured by overlapping the slit of the holding member 41 and the extension member 61.

Third Embodiment
The cable covering tool 1C according to the present embodiment is different from the cable covering tool 1B according to the second embodiment in that the jacket tube 10 does not include the communication portion 16. Hereinafter, points different from the second embodiment will be mainly described, and the same elements and members will be denoted by the same reference numerals and detailed description will be omitted.

  As shown in FIG. 9, the cable covering device 1 </ b> C includes a jacket tube 10 </ b> C, a grounding portion 30 </ b> B and a core member 70. The ground portion 30B and the core member 70 are the same as those of the second embodiment, and also the point that the jacket tube 10 and the ground portion 30B are held by the core member 70 in the expanded state is also the second embodiment. It is similar.

  The jacket tube 10 </ b> C is a cold-shrink tube provided with substantially the same shape as the jacket tube 10 </ b> B in the second embodiment. That is, the envelope tube 10C has a tubular shape, is provided with the opening 11a on the tip end side, and is provided with the opening 12a on the rear end side. Further, the jacket tube 10 </ b> C includes the electric field reducing member 13 and the step portion 15. As described above, the jacket tube 10 </ b> C does not include the communication portion 16. Therefore, the ground wire 51 in the ground portion 30B extends from the rear end 12 in the axial direction of the jacket tube 10C to the outside through the inside of the jacket tube 10C in a state where the ground portion 30B is disposed at the step. doing.

  The cable covering device 1 </ b> C includes a waterproof member 19 that covers the outer periphery of the core member 70 over the entire circumferential direction on the rear end 12 side of the step 15. The waterproofing member 19 is, for example, putty material provided with waterproofness like the waterproofing member 18. The grounding wire 51 is surrounded by the waterproof member 19 around the inside of the jacket tube 10B. That is, the ground line 51 is embedded in the waterproof member 19. As described above, in the present embodiment, by surrounding the ground wire 51 with the waterproof member 19, the waterproofness around the ground wire 51 is secured. The method of covering the power cable 100 in the present embodiment is the same as that of the second embodiment and thus will not be described.

  According to the cable covering device 1C according to the present embodiment, since at least a part of the ground wire 51 is surrounded by the waterproof member 19 inside the jacket tube 10C, waterproofness around the ground wire 51 is ensured. be able to. In particular, when the waterproof member 19 is a putty material, loss of waterproofness is suppressed even when the jacket tube 10C is deformed.

Fourth Embodiment
The cable covering 1D according to the present embodiment is a member attached to a connecting portion that linearly connects the power cables 100 with each other. Therefore, the second embodiment is different from the second embodiment in that ground portions 30B corresponding to the two power cables 100 are provided. The following mainly describes differences from the second embodiment, and the same elements and members are denoted by the same reference numerals and detailed description thereof is omitted.

  As shown in FIG. 10, the cable covering device 1D includes a jacket tube 10D, a core member 70, and two grounding portions 30B. The jacket tube 10D is a cylindrical cold-shrink tube, and has openings 14 at both ends. The outer cover tube 10D is provided, for example, on a ground layer (external conductive layer) 27 made of conductive rubber such as conductive silicone rubber, the insulating layer 25 provided inside the ground layer 27, and further inside the insulating layer 25. And an internal electrode (internal conductive layer) 26. The insulating layer 25 is made of insulating rubber and is formed to have a smaller axial length than the ground layer 27. Further, the internal electrode 26 is made of conductive rubber, and the axial length thereof is smaller than that of the insulating layer 25. The ground layer 27, the insulating layer 25 and the internal electrode 26 are arranged such that the centers in the axial direction coincide with each other. Since the insulating layer 25 is disposed between the internal electrode 26 and the ground layer 27, the internal electrode 26 and the ground layer 27 are not in contact with each other. In the inner circumferential surface of the jacket tube 10D, the central region in the axial direction is the internal electrode 26, and the insulating layers 25 of a certain length are disposed at both ends of the internal electrode 26, and both ends in the axial direction from the insulating layer 25 Up to the point is the ground layer 27. Further, the jacket tube 10D is provided with stepped portions 15 on the ground layer 27 which is closer to the opening 14 and the other opening 14 than the insulating layer 25 is. Further, communication portions 16 are formed in these step portions 15 respectively.

  The ground portion 30B is the same as that of the second embodiment, and disposed in the step portion 15 formed in the ground layer 27 in a state where the ground wire 51 passes through the communication portion 16. Thereby, the ground portion 30B and the ground layer 27 come in contact with each other. The ground portion 30B and the ground layer 27 are integrally formed so that the ground wire 51 is in close contact with the inside of the communication portion 16. The jacket tube 10D provided with such a grounding portion 30B is enlarged by the core member 70 and held. The cable covering device 1D is provided with a waterproof member 18 between the jacket tube 10D and the core member 70 on the side closer to the opening 14 than the respective step portions 15. The waterproof member 18 may be omitted depending on the application situation.

  Next, a method of covering the connection portion of the two power cables 100 using the above-described cable covering device 1D will be described.

  First, as a first step, the coating of each end of the two power cables 100 is processed. That is, from the power cable 100 to the insulator 102, the conductor 101, the insulator 102, the semiconductive layer 103, and the shielding layer 104 are exposed in order from the tip of the power cable 100 by a predetermined length. , The semiconductive layer 103, the shielding layer 104, and the cable sheath 105 are peeled off in a step-like manner. This completes the preparation of the power cable 100 in advance.

  Subsequently, in the next step, one of the power cables 100 of which the coating on the end portion has been treated is inserted into the cable coating device 1D. Then, the conductor 101 of the inserted power cable 100 and the conductor 101 of the other power cable 100 are connected by the connection member.

  The two connected power cables 100 are positioned so that the axial positions of the respective shielding layers 104 and the corresponding contact members 31 coincide with each other. Then, while keeping this state, the core member 70 is removed from the opening 14 of the cable covering device 1D sequentially from the core ribbon on the tip side through the inner side of the core member 70, whereby the core member 70 is removed and the grounding portion The jacket tube 10 is contracted along with 30B. Thereby, the shielding layer 104 of the power cable 100 and the grounding portion 30B are electrically connected, and the shielding layers 104 of the two power cables are electrically connected by the grounding layer 27. Further, the internal electrode 26 covers the connecting members connecting the conductors 101 of the two power cables 100 and the conductors 101 and covers a part of the insulator 102. Subsequently, as in the second embodiment, the ground wires 51 extending outward from both ends of the cable covering 1D are attached to a predetermined grounding wire, or mutually connected by a predetermined grounding wire. Connected to

  According to the method of covering the cable connection portion according to the present embodiment, the preparation of the power cable 100 is completed in advance by the step of processing the coating of the end portions of the two power cables 100, so the workability at the site is improved. improves.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  For example, although the example in which the bonding between the contact member 31 and the holding member 41 is performed by solder bonding has been shown, the invention is not limited thereto. The contact member 31 and the holding member 41 may be electrically connected, and may be spot welding or physical fitting other than solder bonding.

  In addition, in the first embodiment, the compression terminal 20 is shown as being separate from the cable covering device 1A, but the present invention is not limited to this. The compression terminal 20 may be attached in advance to the end 11 of the jacket tube 10A by integral molding, adhesion or the like. In this case, the step of inserting the power cable into the cable jacket and the step of fixing the power cable inserted into the cable jacket to the compression terminal are performed substantially simultaneously.

  Moreover, although the coating | cover of the edge part of the power cable 100 connected to the compression terminal 20 was illustrated in 1st-3rd embodiment and the coating | cover of the connection part of power cable 100 comrades was illustrated in 4th Embodiment, It is not limited. The cable covering tool 1A can be applied to a covering tool that needs to be provided with the ground portion 30 with respect to the shielding layer 104 of the power cable 100. Directly connected device. Also, the cable covering tool 1A may be a covering tool for a branched portion in the case where one power cable 100 branches into two. Furthermore, it may be a salt resistant terminal provided with a bushing.

  In the first embodiment, the ground wire 51 is embedded in the outer cover tube 10A in the entire area from the step 15 to the rear end 12 of the outer cover tube 10A. However, the present invention is not limited to this. For example, a waterproof putty material may be provided inside the opening 12a on the rear end side of the jacket tube 10A, and only the rear end side of the grounding wire 51 may be embedded in the putty material.

  In the second to fourth embodiments, the extension member 61 is soldered to the end 41 a of the holding member 41 joined to the contact member 31. However, the present invention is not limited to this. The extension member 61 may be connected to the other end 41 b side of the holding member 41 which is not joined to the contact member 31. For example, in the case where the extension member 61 is not provided, the state in which the contact member 31 and the holding member 41 are excessively expanded and the other end 41 b of the holding member 41 is positioned inside the slit 32 of the contact member 31 is considered. From this state, when the diameter of the contact member 31 and the holding member 41 is reduced, the other end 41b of the holding member 41 may enter the inner peripheral side of the contact member 31 or interfere with the end of the contact member 31. . However, when the extension portion 61 is joined to the end (the other end 41b) on the side sliding with the contact member 31 when the diameter of the ground portion 30B is expanded, the contact member 31 and the holding member 41 are excessively expanded. Even in this case, the holding member 41 can be guided to the outer peripheral side of the contact member 31 by positioning the extension member 61 to be in contact with the outer peripheral side of the contact member 31 and functioning as a guide for the holding member 41. .

  Further, in the fourth embodiment, the example in which the ground portion 30B is disposed in the step portion 15 in a state where the ground wire 51 passes through the communication portion 16 is shown, but the present invention is not limited thereto. The grounding portion may be arranged as in the third embodiment. That is, the cable covering device is provided with a waterproof member that covers the outer periphery of the core member 70 over the entire circumferential direction on the rear end 12 side of the step 15 and the grounding wire is on the inside of the jacket tube. The periphery may be surrounded by a waterproof member.

  Furthermore, in the fourth embodiment, in the case of the connection mode in which the ground lines 51 at both ends are mutually connected, the ground lines 51 may be connected in advance. In the example in which the two power cables in the fourth embodiment are linearly connected, the jacket tube is a cold-shrink tube. However, the present invention is not limited thereto and may be as shown in the first embodiment. The ground portions 30A may be built in at both ends of the outer tube (not a cold shrink tube).

  1A to 1D: cable covering tool, 10A to 10D: jacket tube (elastic jacket), 30A, 30B: grounding portion, 31: contact member, 41: holding member, 51: grounding wire, 61: extension member, 70: 70 Core member (expanded diameter member), 100: power cable, 104: shielding layer.

Claims (13)

A cable jacket covering an end or a connection of a power cable, comprising:
A contact member which is conductive and circumferentially covers a shielding layer of the power cable at least when the power cable is coated, and is electrically connected to the shielding layer;
A holding member which is formed of a curved plate having conductivity and holds the contact member from the outer peripheral side;
A cylindrical elastic jacket provided so as to cover the holding member from the outer peripheral side;
A ground wire connected to the holding member and extending to the outside of the elastic jacket ;
The contact member has a tubular shape, and a region on the central side in the axial direction is curved inward in the radial direction relative to both ends in the axial direction,
A plurality of elongated holes extending in the axial direction are formed in the circumferential direction in the contact member,
The retaining member, during the coating of at least said power cables, cable sheathing tool you press the contact member. The cable jacket according to claim 1, wherein at least a part of the ground wire is embedded in the elastic jacket. Wherein at least a portion of the ground line, said surrounded by the waterproof member in the elastic sheath of the inner cable coating device of claim 1 or 2. The cable covering according to claim 3 , wherein the waterproof member is a putty material. The contact member has a tubular shape,
A slit extending from one end to the other end in the axial direction is formed at a predetermined position in the circumferential direction of the contact member,
In the unloaded state, the holding member covers the slit and overlaps at least a part of the contact member,
The cable sheathing device according to any one of claims 1 to 4 , wherein the ground line is connected to a position overlapping with the contact member in the holding member. The elastic jacket is a cold-shrink tube, and the diameter of the elastic jacket is increased by an inner diameter expanding member,
The cable covering according to any one of claims 1 to 5 , wherein the contact member and the holding member are disposed between the elastic jacket and the enlarged diameter member. The cable covering according to claim 6 , wherein the holding member is provided with an extension member extending from a circumferential end of the holding member. Portion extending outwardly of said resilient sheath in the ground line is covered by the covering member, at least a portion of the covering member is adapted to be detached from the ground line, according to claim 1 to 7 The cable covering according to any one of the preceding claims. A step of processing a coating of an end portion of a power cable, a step of inserting the power cable having the coating of the terminal portion treated into the cable covering device according to any one of claims 1 to 5, a plugging in the cable covering device And fixing the compression terminal to the power cable and attaching the ground wire to the ground wire.   A cable jacket covering an end or a connection of a power cable, comprising:
  A contact member which is conductive and circumferentially covers a shielding layer of the power cable at least when the power cable is coated, and is electrically connected to the shielding layer;
  A holding member which is formed of a curved plate having conductivity and holds the contact member from the outer peripheral side;
  A cylindrical elastic jacket provided so as to cover the holding member from the outer peripheral side;
  A ground wire connected to the holding member and extending to the outside of the elastic jacket;
  The elastic jacket is a cold-shrink tube, and the diameter of the elastic jacket is increased by an inner diameter expanding member,
  The cable covering device, wherein the contact member and the holding member are disposed between the elastic jacket and the diameter increasing member.   11. The cable covering device according to claim 10, wherein the holding member is provided with an extension member extending from a circumferential end of the holding member. Processing the coating of the end portion of the power cable, the power cable in which the coating of the end portion has been treated is passed through the cable covering device according to claim 6, 7, 10 or 11 , and the power in the cable covering device A cable comprising the steps of removing the diameter expansion member and contracting the elastic sheath in a state where the cable is positioned, securing the compression terminal to the power cable, and attaching the ground wire to the grounding wire Terminal covering method. A step of processing the coating of the end of the two power cables, a step of inserting one of the power cables treated with the coating of the end through the cable covering tool according to claim 6, 7, 10 or 11 ; Connecting the other end of the power cable to the other end of the power cable treated with the coating, removing the diameter-expanding member in a state where the two power cables connected in the cable sheathing are positioned, and A method of covering a cable connection portion, comprising the steps of: contracting a cover; and attaching the grounding wire to a grounding wire.

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