JP2008237001A - Cable connecting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cable connecting structure which suppresses dislocation between a cable conductor and a cable sheath, maintains water intrusion preventing performance at a connection part, and enables easy connection requiring no expert skills. <P>SOLUTION: The cable connecting structure comprises: a terminal part of a cable comprising a sheath attached to a connection part body; an almost circular adhesive member arranged to stride over the connection part body and the sheath; and a tape wrapped to cover the adhesive member. The adhesive member is almost cylindrical, consisting of halves. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cable terminal for connecting a cable having a sheath such as rubber or plastic to another cable or device, and more particularly to a cable connection structure that prevents positional displacement and has excellent waterproof performance.

  To connect a cable with a sheath, peel off the sheath at the end, electrically connect the stripped conductor body to the conductor or terminal of another cable to be connected in the connection body, and strip the part Was accommodated in the connecting portion main body, and an insulating tape was wound around the cable together with the connecting portion main body to insulate and prevent water from entering the sheath.

  FIG. 2 is a diagram illustrating a conventional cable connection structure. Although the details are not shown in FIG. 2, the power cable terminal portion is stepped to a predetermined length to expose the cable conductor (stranded wire), the cable insulator, the semiconductive layer, and the shielding layer, Connect the cable conductor to the terminal. An electric field relaxation treatment is performed on the cable insulator, and an insulating tape 109 is wound around the cable sheath 108 from the lower part of the connection body 110 following the connection body 103 to form a power cable terminal portion.

  Japanese Patent Application Laid-Open No. 11-89070 discloses a method of preventing a sheath from being displaced by forming a protrusion. That is, the surface of the cable sheath at the position where the cable bracket for fixing the terminal portion of the power cable is attached is preliminarily roughened with a cloth file or the like, and a cylindrical member having a flange at one end is set on the surface and wound with an adhesive polyethylene tape. Attach and fix the cylindrical member and the cable sheath of the power cable with a room-temperature-curable epoxy compound, and then wind the insulation tape around the opening on the opposite side of the flange of the cylindrical member. Form.

Japanese Patent Laid-Open No. 9-275628 discloses a method for preventing the movement of the cable sheath of the cable end. That is, a double lock type fixing tool of a plastic molded product having a threaded portion at the flange portion is tightened with a screw in the vicinity of the cable fixing bracket for fixing the end of the power cable.
JP-A-11-89070 Japanese Patent Laid-Open No. 9-275628

  As described above, the cable sheath is usually formed by molding the cable conductor on the outermost periphery of the cable body with an insulator, a semiconductive layer or a copper tape layer (wrapping layer) interposed in the cable conductor. When it is cut, misalignment is likely to occur between the cable conductor and the cable sheath in the vicinity thereof.

If the positional deviation between the cable main body and the cable sheath is large, the insulating tape wound around the connection portion main body and the cable sheath may loosen, and the water leakage prevention property of the connection portion may be insufficient. The tape includes a tape having a polyethylene tape as a tape substrate and butyl rubber as an adhesive layer.
Also, the tape is often wound manually by the operator even at the connection site. Therefore, variation due to the skill of the operator may occur.

  Accordingly, an object of the present invention is to suppress the positional deviation that occurs between the cable conductor and the cable sheath, maintain the water leakage prevention property of the connection portion, and can be easily connected without requiring skill. It is to provide a structure.

The inventor has intensively studied to solve the above-mentioned conventional problems. As a result, in the state where the terminal portion of the cable provided with the sheath is attached to the connection portion main body, the substantially cylindrical contact member is disposed so as to straddle the connection portion main body and the sheath, and the contact member is further connected to the connection portion with the tape. It has been found that when the main body and the sheath are fixed so as to be in close contact with each other, the positional displacement between the close contact member and the sheath / connection main body can be suppressed by the frictional force between the sheath surface and the connection portion main body surface.
The present invention has been made based on the research results described above.

  According to a first aspect of the cable connection structure of the present invention, a cable end portion having a sheath is attached to the connection portion main body, and a substantially cylindrical adhesion member disposed so as to straddle the connection portion main body and the sheath; And a cable connection structure including a tape wound around the contact member.

  A second aspect of the cable connection structure according to the present invention is a cable connection structure in which the contact member is a half-cylindrical substantially cylindrical shape.

  A third aspect of the cable connection structure according to the present invention is a cable connection structure in which the contact member includes a concave portion having a shape corresponding to a shape of a lower portion of the connection body on an inner wall of a cylindrical upper portion.

  According to a fourth aspect of the cable connection structure of the present invention, the contact member has a hardness that follows compression deformation, has excellent compressive stress retention, has a long-lasting sealability, and heat resistance. This is a cable connection structure made of an excellent member.

  A fifth aspect of the cable connection structure according to the present invention is a cable connection structure in which the contact member is a molded body of vulcanized rubber having a JISA hardness in the range of 20 to 60.

  A sixth aspect of the cable connection structure according to the present invention is a cable connection structure in which the adhesion member is a molded body of vulcanized rubber having a JISA hardness of 30 or less.

  A seventh aspect of the cable connection structure of the present invention is a cable connection structure in which the thickness of the adhesion member is 2 mm or less.

  According to the cable connection structure of the present invention, the substantially cylindrical contact member is disposed so as to straddle the connection portion main body and the sheath in a state where the terminal portion of the cable provided with the sheath is attached to the connection portion main body. Since the member is fixed by tape so as to be in close contact with the connection portion main body and the sheath, the displacement between the close contact member and the sheath / connection portion main body can be suppressed by the frictional force between the sheath surface and the connection portion main body surface. . Furthermore, a high waterproof function can be maintained.

The aspect of the cable connection structure of this invention is demonstrated referring drawings.
One aspect of the cable connection structure of the present invention is a substantially cylindrical contact member that is mounted so that a terminal portion of a cable including a sheath is attached to the connection portion main body and straddles the connection portion main body and the sheath; It is a cable connection structure provided with the tape wound so that the said adhesion member might be covered.

  FIG. 1 is a partial cross-sectional view illustrating one embodiment of a cable connection structure according to the present invention. Fig.1 (a) is the figure which showed the partial cut surface of the connection part notionally. FIG. 1B is a perspective view illustrating the contact member.

  Although details are not shown in FIG. 1A, a cable conductor (such as a copper stranded wire), a cable insulator, a semiconductive layer, a copper tape, etc. The cable with the shield layer exposed is inserted and electrically connected to a cable conductor (for example, another cable or a terminal for connecting devices). The connection between the cable conductor and the terminal for connecting the device is covered with the connecting portion main body 3 and is not exposed to the outside. The lower part (lower part of the connection body) 10 of the connection part main body 3 has a diameter that decreases from the connection body at the shoulder corresponding to the shape of the cable, and extends downward along the cable. The tip of the lower part of the connection main body is in contact with the outer peripheral surface of the sheath so as to closely wrap around the sheath.

  In the past, tape was directly wrapped around the surface of the connecting portion main body formed in this way and the upper end of the sheath covered with a part of the lower portion of the connecting main body, and both were fixed. However, the adhesive force of the insulating tape is greatly changed by heat, and when the external force is applied to the cable body or the temperature change is large, the adhesive property of the adhesive layer such as butyl rubber of the tape is lowered.

  In the present invention, as described above, the distal end portion of the lower portion of the connection main body 10 that has a diameter that decreases from the connection main body at the shoulder portion 11 and extends downward along the cable in accordance with the shape of the cable is closely attached. Then, a vulcanized rubber halved contact member is mounted so as to straddle the lower part of the connection main body and the sheath in a state where the sheath is in contact with the outer peripheral surface of the sheath.

A close contact member to be mounted will be described with reference to FIG.
As shown in FIG.1 (b), the contact | adherence member 2 consists of a cylindrical member of the half form. That is, it consists of two members 2-1 and 2-2 that are cylindrical when combined. A concave portion 12 having a shape corresponding to the shape of the lower portion of the connection main body is provided on the inner wall of the cylindrical upper portion. The contact member is not limited to the two members as described above, and a part of the cylindrical member may be cut out, and the part may be opened so as to straddle the lower part of the connection main body and the sheath. The contact member is preferably soft and has a hardness capable of following the compression deformation well. Moreover, it is preferable that the compressive stress retention is excellent and the sealing property is maintained for a long time. An ultra-low hardness rubber that can be molded into a free shape and has excellent heat resistance is preferred.

  As described above, the vulcanized rubber halved contact member that is mounted so as to straddle the lower part of the connection body and the sheath is wound around the tape together with the lower part of the connection body and the sheath and fixed.

This tape may be a conventional tape. For example, a protective / waterproof tape in which a self-adhesive adhesive material excellent in mechanical strength and vulcanized rubber sheet is excellent in waterproofness is preferably used.
As described above, since the contact member is closely fixed with the tape in a state straddling the lower part of the connection main body and the sheath, the friction member and the surface of the connection part main body cause friction between the contact member and the sheath / connection part main body. Suppresses misalignment.

As an effect, the displacement of the close contact member is suppressed, and the waterproof function is maintained.
The adhesion member is preferably vulcanized rubber, but if the hardness is too high, the surface followability between the sheath and the connecting portion main body is low, and the waterproof performance may be insufficient.
Accordingly, a hardness of 20 to 60 is good, and particularly a hardness of 30 or less having a lower hardness is preferred.

Even if the temperature rises to some extent, the vulcanized rubber suppresses the positional deviation between the contact member and the sheet / connecting part body due to the frictional force with the sheet surface and the connecting part body surface.
There is little deterioration in the waterproof performance, and the deviation between these and the contact member is suppressed to a small extent.
It is convenient to use an adhesive member with a half-cut shape fitted on site. Moreover, it is good to match | combine with the shape of the connection part main body and the cable outer periphery of the site | part to mount. By using a half-separated contact member, stable connection processing can be performed without requiring a special technique.
As described above, the adhesion can be enhanced by the low-hardness rubber adhesion member, and the positional displacement can be prevented and the waterproofness can be maintained by the adhesion and the frictional resistance.

  According to this invention, in the state where the terminal portion of the cable provided with the sheath is attached to the connecting portion main body, the substantially cylindrical close contact member is disposed so as to straddle the connecting portion main body and the sheath, and the close contact member is Since it is fixed so as to be in close contact with the connection portion main body and the sheath, it is possible to suppress positional deviation between the close contact member and the sheath / connection portion main body by the frictional force with the sheath surface or the connection portion main body surface. Furthermore, a high waterproof function can be maintained.

FIG. 1 is a partial cross-sectional view illustrating one embodiment of a cable connection structure according to the present invention. Fig.1 (a) is the figure which showed the partial cut surface of the connection part notionally. FIG. 1B is a perspective view illustrating the contact member. FIG. 2 is a diagram illustrating a conventional cable connection structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cable connection structure 2 Adhesion member 3 Connection part main body 8 Cable sheath 9 Insulation tape 10 Connection main body lower part 11 Shoulder part 12 Inner wall recessed part 100 Cable connection structure 103 Connection part main body 108 Cable sheath 109 Insulation tape 110 Connection main part lower part

Claims (7)

  A cable end portion having a sheath attached to the connection portion body, a substantially cylindrical contact member disposed so as to straddle the connection portion body and the sheath, and a tape wound around the contact member Cable connection structure with   The cable connection structure according to claim 1, wherein the contact member is a half-type substantially cylindrical shape.   The cable connection structure according to claim 2, wherein the contact member includes a concave portion having a shape corresponding to a shape of a lower portion of the connection main body on an inner wall of a cylindrical upper portion.   The said contact | adherence member consists of a member which has the hardness which follows a compressive deformation, is excellent in the holding | maintenance of a compressive stress, and is excellent in the long-term sustainable sealing performance and heat resistance. The cable connection structure described.   The cable connection structure according to claim 1 or 2, wherein the adhesion member is a molded body of vulcanized rubber having a JISA hardness of 20 to 60.   The cable connection structure according to claim 1 or 2, wherein the adhesion member is a molded body of vulcanized rubber having a JISA hardness of 30 or less. The cable connection structure according to any one of claims 1 to 6, wherein a thickness of the adhesion member is 2 mm or less.

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