JP2009104875A - Conductor connection method and structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method capable of easily filling the inside of a connection sleeve with a resin and increasing the water stop performance at the joint of cable cores or wires by filling the inside of the sleeve with resin after connecting conductors in the sleeve. <P>SOLUTION: When a pair of cable conductors 60 are connected with a cylindrical sleeve 54 having a hole 52 on the wall 50 of the sleeve, this method comprises the steps of inserting conductors 62 each of which is projecting from the cable core into the sleeve through its ends 64, compressing the sleeve to deform so that the sleeve wall is press-fitted to the conductors, filling the inside of the sleeve with resin through the hole 52, and blocking out at least the hole 52 and internal spaces around the conductors in the sleeve liquid-tightly with the resin. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a connection method and a connection structure of a cable core wire or an electric wire conductor such as a power cable, a lead wire cable, a signal cable, a control cable, and a communication cable.

  Conventionally, a cylindrical butt sleeve is used to connect cable core wires (Non-Patent Document 1). In addition, as a sleeve for connecting the cable core wire, it is possible to provide at least two crimping parts to be crimped to the conductor end, and to connect between the conductors to which the crimping parts are crimped to extend electrical conduction. A crimp terminal is known in which the interior between the crimp parts is liquid-tightly closed (Patent Document 1).

http://www.jst-mfg.com/product/pdf/A-E2.pdf JP 2001-357903 A

  When the cable core wire is connected using the above-described cylindrical butting sleeve or the sleeve of Patent Document 1, it is conceivable to fill the sleeve with resin for the purpose of improving the water stop performance at the connecting portion.

  However, when the cable core wire is connected using the cylindrical butting sleeve or the sleeve of Patent Document 1 and the resin is filled in the sleeve, the resin is first filled in the sleeve, and then the conductor to the sleeve is filled. It was necessary to make a connection, and the work was complicated.

  The present invention has been made in view of the above-described circumstances, and after connecting a conductor to a sleeve, the sleeve can be filled with resin. Therefore, the resin can be filled into the sleeve with a simple operation. Then, it aims at providing the connection method and connection structure of a conductor which can improve the water stop performance of the connection part of a cable core wire or an electric wire.

In order to achieve the above object, the present invention provides a conductor connection method shown in the following (A) and (B) and a conductor connection structure shown in the following (C) and (D).
(A) When connecting a pair of cable core wires or conductors of a wire using a cylindrical sleeve having a hole in the wall, the conductors projecting from both cable core wires or the ends of the wires are connected to both sleeves. The sleeve is inserted into the sleeve, and then the sleeve is deformed so that the wall of the sleeve is crimped to the two conductors, and then the resin is filled into the sleeve from the hole, and at least both the hole and the sleeve are filled. A method for connecting conductors, characterized in that an internal space existing between conductors is liquid-tightly closed with the resin.
(B) A closed portion for liquid-tightly closing the internal space portion is provided inside the cylindrical main body, whereby a pair of conductor insertion portions having the closed portion as a bottom portion is formed in the cylindrical main body, and the both conductors When connecting a pair of cable core wires or wire conductors using sleeves each having a hole in the wall portion of the insertion portion, the conductors protruding from both cable core wires or the end portions of the wire are connected to the conductor insertion portions of the both conductor insertion portions. After inserting into the respective conductor insertion portions from the openings, and then deforming the conductor insertion portions and crimping the wall portions of the respective conductor insertion portions to the conductors, filling both the conductor insertion portions from the holes with resin, A conductor connection method, wherein the hole is liquid-tightly closed with the resin.
(C) A conductor connection structure using a cylindrical sleeve having a hole in the wall, wherein the conductors protruding from the ends of the pair of cable core wires or wires are respectively sleeves from both openings of the sleeve. And the sleeve is deformed so that the wall of the sleeve is crimped to both conductors, and the resin is filled into the sleeve from the hole and exists at least between the hole and both conductors in the sleeve. The conductor connecting structure is characterized in that the internal space portion to be closed is liquid-tightly closed by the resin.
(D) A pair of conductor insertion portions having the closed portion as a bottom is formed in the cylindrical main body by providing a closed portion that liquid-tightly closes the internal space inside the cylindrical main body, and the two conductors A conductor connection structure using sleeves each having a hole in the wall portion of the insertion portion, wherein the conductors protruding from the ends of the pair of cable core wires or wires are from the openings of the two conductor insertion portions of the sleeve. Each of the conductor insertion portions is inserted into the conductor insertion portion, and the conductor insertion portion is deformed so that the wall portion of each conductor insertion portion is crimped to the conductor. Is closed liquid-tightly with the resin.

  In the present invention, after connecting the cable core wires or the conductors of the electric wires using a sleeve having a hole in the wall portion, the sleeve is filled with resin from the hole, and the resin is used to provide a place necessary for water stoppage. Occludes liquid tightly. Therefore, according to the present invention, the resin can be filled into the sleeve after the conductor is connected to the sleeve. Therefore, the resin can be filled into the sleeve with a simple operation, and the cable core wire or the electric wire can be filled. The water stop performance at the connection point can be enhanced.

  In the present invention, as the resin filled in the sleeve, for example, a curable resin such as a urethane resin, an epoxy resin, a silicone resin, and a phenol resin can be used. The resin may be one-component curable or two-component curable. However, in the present invention, not a curable resin but a non-curable gel-like resin can be used as the resin.

In the present invention, the method of filling the resin into the sleeve from the hole in the sleeve is not limited. For example, the following methods (1) to (3) can be adopted.
(1) A method of filling a resin into a sleeve from a hole in the sleeve using a syringe.
(2) After wrapping the connection part which connected the conductor of one or several cable core wires or electric wires of a single core or a multi-core electric cable, and arrange | positioning a metal mold | die or a synthetic resin case, resin is said metal A method in which the cables are connected to each other by being injected into a mold or a case, and resin is filled into the sleeve from the hole of the sleeve (see Japanese Patent Laid-Open No. 5-103408). In this method, a cell pack (trade name) which is a resin injection type cable connection kit manufactured by Furukawa Electric Co., Ltd. can be used.
(3) After connecting one or a plurality of cable core wires or conductors of electric wires protruding from the ends of a pair of single-core or multi-core cables using a sleeve, from one end of the outer surface of one cable or electric wire A cylindrical body made of the above-described flat film or sheet between the ends of both cables or electric wires by directly or indirectly winding and fixing the flat film or sheet around the end of the outer peripheral surface of the other cable or electric wire. Then, by injecting resin into the cylindrical body, the cable or the electric wire is connected, and the resin is filled into the sleeve from the hole of the sleeve.

  In the above method (3), since a cylindrical body made of a flat film or sheet is formed between the ends of both cables or electric wires, the resin is injected into the cylindrical body, so that a simple member or tool can be used. Cables or electric wires can be connected easily and reliably. In addition, since the inside of the cylindrical body is filled with resin and the connection portion of the cable core wire or the electric wire is completely covered with the resin, insulation and waterproofing of the connection portion of the cable or the electric wire can be reliably performed. Furthermore, since the cylindrical body which consists of a flat film or a sheet | seat is thin, the connection part of a cable or an electric wire can be made small.

  In the method of (3) above, after forming the large diameter portion at the outer peripheral surface end of both cables or electric wires, the outer diameter of the large diameter portion of one cable or electric wire is changed to the large diameter portion of the other cable or electric wire. A flat film or sheet can be wound around the outer peripheral surface and fixed. Thereby, the quantity of resin with which the inside of a cylindrical body is filled can be increased, and the intensity | strength of the connection part of a cable or an electric wire can be raised.

  According to the present invention, after the conductor is connected to the sleeve, the sleeve can be filled with the resin. Therefore, the resin can be filled into the sleeve with a simple operation to connect the cable core wire or the electric wire. The water stop performance can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following examples.

(First embodiment)
FIG. 1 is a flowchart showing an embodiment of a conductor connecting method according to the present invention (A). In this example, the cable core wires are connected as follows.
(1) As shown in FIG. 1A, a cylindrical metal sleeve 54 in which a hole (conductor confirmation hole) 52 is provided in the wall portion 50 was prepared. In the sleeve 54, a conductor stopper 56 is formed to bulge out at the center in the axial direction of the inner surface, and the hole 52 is formed at a position where the tip of the conductor can be seen. Further, the outer peripheral surface of the sleeve 54 is covered with two insulating tubes 58 without closing the hole 52.
(2) As shown in FIG. 1A, the conductors (stranded wire conductors) 62 protruding from the ends of the pair of cable core wires 60 are inserted into the sleeves 54 from both openings 64 of the sleeve 54.
(3) As shown in FIG. 1B, both sides of the sleeve 54 are deformed by using a caulking tool, and the wall portion 50 of the sleeve 54 is crimped to the two conductors 62.
(4) Resin 66 is filled into the sleeve 54 from the hole 52 and hardened, and as shown in FIG. 1C, at least the internal space portion existing between the hole 52 and the two conductors 62 in the sleeve 54 is made of the resin 66. To close liquid tightly. However, in this example, portions other than the hole 52 of the sleeve 54 and the internal space are also liquid-tightly closed by the resin 66.

  Through the above steps, the cable core wire 60 is connected using the cylindrical sleeve 54 in which the hole 52 is provided in the wall portion 50, and the conductor 62 protruded from the end portions of the pair of cable core wires 60 is the sleeve 54. The sleeve 54 is deformed so that the wall portion 50 of the sleeve 54 is crimped to the two conductors 62, and the resin 66 is filled into the sleeve 54 through the hole 52. The conductor connection structure of the present invention (C) is formed in which at least the internal space between the hole 52 and the conductor 62 in the sleeve 54 is liquid-tightly closed by the resin 66.

(Second Embodiment)
FIG. 2 is a flowchart showing one embodiment of the conductor connection method according to the present invention (B). In this example, the cable core wires are connected as follows.
(1) As shown in FIG. 2A, a closed portion 72 that liquid-tightly closes the internal space 71 is integrally provided inside the cylindrical main body 70, whereby the closed portion 72 is provided in the cylindrical main body 70. A metal sleeve 80 was prepared in which a pair of conductor insertion portions 74 as bottom portions were formed, and holes (conductor confirmation holes) 78 were provided in the wall portions 76 of both conductor insertion portions 74, respectively. The hole 78 is formed at a position where the tip of the conductor can be seen. In addition, the outer peripheral surface of the sleeve 80 is covered with two insulating tubes 82 without closing the hole 78.
(2) As shown in FIG. 2A, the conductors (stranded conductors) 86 protruding from the ends of the pair of cable core wires 84 are respectively inserted into the conductor insertion portions 74 from the openings 88 of the both conductor insertion portions 74. insert.
(3) As shown in FIG. 2B, the conductor insertion portion 74 is deformed using a caulking tool, and the wall portion 76 of the conductor insertion portion 74 is crimped to both conductors 86.
(4) The resin 90 is filled into the sleeve 80 from the hole 78 and cured, and at least the hole 78 is liquid-tightly closed with the resin 90 as shown in FIG. However, in this example, portions other than the hole 78 of the sleeve 80 are also liquid-tightly closed by the resin 90.

  Through the above steps, a closed portion 72 that liquid-tightly closes the internal space portion 71 is provided inside the cylindrical main body 70, so that a pair of conductor insertion portions 74 having the closed portion 71 as a bottom portion are formed in the cylindrical main body 70. A conductor connection structure using a sleeve 80 that is formed and in which a hole 78 is provided in each of the wall portions 76 of both the conductor insertion portions 74, and a conductor 86 that protrudes from the ends of a pair of cable core wires 84 is provided. The sleeves 80 are inserted into the conductor insertion portions 74 from the openings 88 of both the conductor insertion portions 74, and the conductor insertion portions 74 are deformed so that the wall portions 76 of the conductor insertion portions 74 are crimped to the conductors 86. In addition, the conductor connection structure of the present invention (D) is formed in which the resin 90 is filled into the both conductor insertion portions 74 from the hole 78 and at least the hole 78 is liquid-tightly closed by the resin.

  In the first embodiment and the second embodiment described above, as a method of filling the resin into the sleeve from the hole of the sleeve, for example, the methods shown in the above (1) to (3) can be adopted. In this case, after connecting the conductors of the plurality of cable core wires protruding from the ends of the pair of multi-core cables using the sleeve, the cable is connected by the method (2) or (3), and the sleeve When the resin is filled into the sleeve from the hole, the resin can be efficiently filled into the plurality of sleeves simultaneously. Further, according to the method (2) or (3), the connection of the cable and the filling of the resin into the sleeve can be efficiently performed simultaneously.

  Further, as in the first and second embodiments, when the insulating tube is covered on the outer peripheral surface of the sleeve without closing the hole, the cable is connected by the method (2) or (3), and the sleeve Even if the sleeve is located on the surface of the resin filled in the mold or the cylindrical body when the resin is filled into the sleeve from the hole of the cable, the insulating tube is not formed on the surface of the resin. Therefore, good insulation can be obtained.

It is a flowchart which shows one Embodiment of the connection method of the conductor which concerns on this invention. It is a flowchart which shows one Embodiment of the connection method of the conductor which concerns on this invention.

Explanation of symbols

50 Wall portion 52 Hole 54 Sleeve 58 Insulating tube 60 Cable core wire 62 Conductor 64 Opening portion 66 Resin 70 Cylindrical main body 71 Internal space portion 72 Blocking portion 74 Conductor insertion portion 76 Wall portion 78 Hole 80 Sleeve 82 Insulating tube 84 Cable 86 Conductor 88 Opening 90 resin

Claims (6)

  When connecting a pair of cable core wires or conductors of a wire using a cylindrical sleeve having a hole in the wall portion, the conductors projecting from both cable core wires or the ends of the wires are connected from both openings of the sleeve. Each is inserted into the sleeve, and then the sleeve is deformed so that the wall portion of the sleeve is crimped to both conductors, and then resin is filled into the sleeve from the hole, at least between the hole and both conductors in the sleeve. A method for connecting conductors, wherein an existing internal space is liquid-tightly closed with the resin.   By providing a closed portion for liquid-tightly closing the internal space portion inside the cylindrical main body, a pair of conductor insertion portions having the closed portion as a bottom portion is formed in the cylindrical main body, and the two conductor insertion portions When connecting the conductors of a pair of cable core wires or electric wires using sleeves each provided with a hole in the wall portion, the conductors protruding from both cable core wires or the ends of the electric wires from the openings of the both conductor insertion portions After inserting into each conductor insertion part, then deforming the conductor insertion part and crimping the wall part of each conductor insertion part to the conductor, the resin is filled into both conductor insertion parts from the hole, and at least the hole is formed. A method for connecting conductors, wherein the resin is liquid-tightly closed.   The conductor connection method according to claim 1, wherein an insulating tube is coated on an outer peripheral surface of the sleeve without closing the hole.   Conductor connection structure using a cylindrical sleeve with holes in the wall, and a pair of cable cores or conductors protruding from the ends of the wires are inserted into the sleeves from both openings of the sleeve, respectively. And the sleeve is deformed so that the wall portion of the sleeve is pressure-bonded to both conductors, and the resin is filled into the sleeve from the hole, and at least an internal space existing between the hole and the two conductors in the sleeve. A conductor connection structure, wherein the portion is liquid-tightly closed by the resin.   By providing a closed portion for liquid-tightly closing the internal space portion inside the cylindrical main body, a pair of conductor insertion portions having the closed portion as a bottom portion is formed in the cylindrical main body, and the two conductor insertion portions A conductor connection structure using sleeves each having a hole in the wall, wherein the conductors protruding from the ends of the pair of cable core wires or wires are inserted through the openings of the two conductor insertion portions of the sleeve, respectively. And the conductor insertion portion is deformed so that the wall portion of each conductor insertion portion is crimped to the conductor, and both the conductor insertion portions are filled with resin, and at least the hole is the resin. Conductor connection structure characterized in that it is liquid-tightly closed by   The conductor connection structure according to claim 4 or 5, wherein an outer peripheral surface of the sleeve is covered with an insulating tube without closing the hole.

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