JP4557744B2 - Cable branch connection structure - Google Patents

Description

  The present invention relates to a cable branch connection structure for connecting a branch cable in the middle of a trunk cable.

  As a conventional cable branch connection structure, the following structures are known (see, for example, Patent Documents 1 and 2). In FIG. 3, the trunk cable 1 has the sheath 2 removed and an exposed portion 3 formed in the middle. The exposed portion 3 is formed by exposing a plurality of insulated wire cores 4 constituting the trunk cable 1. In the exposed portion 3 in the figure, two branch connection locations are shown. At this branch connection location, the two branch-side insulation cores 6 constituting the branch cable 5 are respectively connected to the corresponding insulation cores 4 and 4. It is connected.

  Here, the formation of the branch connection portion using the crimp sleeve 7 will be described with reference to FIG. In forming the branch connection portion, first, after the insulating core 4 is cut, the insulator 8 of the terminal is peeled to expose the conductor 9. Next, the crimping sleeve 7 is inserted into one conductor 9 and an operation of crimping one side of the crimping sleeve 7 is performed. Subsequently, the other conductor 9 is inserted into the crimping sleeve 7, and the conductor 11 of the branch-side insulating core 6 that has peeled off the insulator 10 at the end is also inserted, and the other side of the crimping sleeve 7 is crimped in this state. I do. Thereafter, the outer side of the crimping sleeve 7 is wound with the heat-resistant tape 12 (in the case of a heat-resistant electric wire), and the outer side is further wound with the insulating tape 13 for protection. Thus, the formation of the branch connection place is completed.

The exposed portion 3 including the branch connection portion is wound with the self-adhesive tape 14, the outer side is wound with the presser winding tape 15, and the outer side is wound with the shield 16 (when the shield is provided) and the protective tape 17. It has been. The exposed portion 3 including the branch connection place is protected with various tapes or the like.
Japanese Patent Laid-Open No. 2-30008 JP-A-9-180850

  By the way, in the said prior art, it has the structure which crimps | bonds three conductors with the crimping sleeve 7. FIG. That is, the conductor 9 is crimped to one side of the crimping sleeve 7 and the conductor 9 and the conductor 11 are collectively crimped to the other side. Therefore, the crimping state is different between the one side and the other side of the crimping sleeve 7, and there is a problem that a crimping failure is likely to occur. The poor crimping will significantly reduce the reliability.

  In the above prior art, since the heat-resistant tape 12 and the insulating tape 13 are wound around the outer side of the pressure-bonding sleeve 7, this tape winding operation is very difficult when there are many branch connection points. Has the problem of becoming. Furthermore, in the above-described conventional technology, there is a problem that the work becomes difficult also in this case because there is a work for winding the protective tape 17 in a wide range on the outermost side.

  This invention is made | formed in view of the situation mentioned above, and makes it a subject to provide the branch connection structure of the cable which aims at the improvement of workability | operativity while improving the reliability of a branch connection location.

In order to solve the above-mentioned problems, the cable branch connection structure of the present invention according to claim 1 exposes a plurality of insulated wire cores constituting the trunk cable in the middle of the trunk cable, and the branch cable is exposed to the exposed portion. In the branch connection structure of the cable connecting the plurality of branch side insulated wire cores constituting
Each branch connection point between the plurality of insulated core wires and the plurality of branch side insulation core wires is made to individually press connected by pressure contact connectors,
The press contact connector comprises an insulating housing and a conductive press contact blade,
The housing is
The first housing formed in a U-shaped cross-section, forming a wire core outlet having a width equal to or more than two insulated wire cores at both ends, and forming a holding portion for the press contact blade; A lid-like member attached to the first housing and covering the first housing, the second housing formed with a pair of wire core pushing portions on the inner surface,
The press contact blade is
Two side-by-side press contact portions for the insulated wire core and the branch side insulated wire core are formed, and are inserted and held in the holding portion of the first housing,
The exposed portion including the pressure contact connector includes:
Self-adhesive tape is wound, the self-bonding tape presser outwardly winding tape wound et al is, on the outside of the presser winding tape, a resin mold portion is provided extending over the sheath of the trunk cable and the branch cable The exposed portion is covered with the resin mold portion.

  According to the present invention having such a feature, it is not necessary to cut off the insulation core of the trunk cable at the time of branch connection, and the insulation skin of the insulation core of the trunk cable and the branch side insulation core of the branch cable No peeling is necessary. Further, according to the present invention, it is not necessary to cut the insulation core, and the insulation core and the branch side insulation core are pressed together. Therefore, the present invention has a structure with high reliability of branch connection.

  According to the present invention, since insulation at the branch connection place is performed by the housing of the press contact connector, it is not necessary to tape the insulated wire cores one by one. Therefore, the present invention reduces the working time. In other words, workability is improved.

  According to the present invention, since the exposed portion is protected by the resin mold portion covering the exposed portion, it is not necessary to wrap the protective tape over a wide range. Therefore, the present invention reduces the working time. In other words, workability is improved.

  A cable branch connection structure according to a second aspect of the present invention is the cable branch connection structure according to the first aspect, wherein the housing has heat resistance.

  According to the present invention having such characteristics, since the housing has heat resistance in addition to insulation, it is not necessary to provide a special heat resistant structure. Therefore, the present invention provides a branch connection location where heat resistance is ensured.

  According to the first aspect of the present invention, there is an effect that the reliability of the branch connection place can be improved. In addition, the workability can be improved.

  According to the second aspect of the present invention, there is an effect that the heat resistance performance of the branch connection place can be ensured only by the housing of the pressure contact connector.

Hereinafter, description will be given with reference to the drawings.
FIG. 1 is a schematic structural explanatory view showing an embodiment of a cable branch connection structure of the present invention. FIG. 2A is a plan view of the pressure connector (second housing omitted), and FIG. 2B is a cross-sectional view of the pressure connector. In addition, the same code | symbol is attached | subjected to the same structural member as a prior art example.

  In FIG. 1, the trunk cable 1 has a sheath 2 removed and an exposed portion 3 formed in the middle. The exposed portion 3 is formed by exposing a plurality of insulated wire cores 4 constituting the trunk cable 1. In the exposed part 3 in the figure, two (assumed to be an example) branch connection locations are shown, and at this branch connection location, two branch-side insulating wire cores 6 constituting the branch cable 5 are shown. Are connected to the corresponding insulated wire cores 4 respectively.

  In FIG. 1 and FIG. 2, the branch connection point is formed by using a heat-resistant tape 12 (see FIG. 4) and an insulating tape 13 (see FIG. 4) on the outside using a crimping sleeve 7 (see FIG. 4) as in the conventional example. Is formed by using the pressure contact connector 21 instead of the structure of winding the wire. Specifically, each branch connection portion is formed by press-connecting the insulation wire core 4 and the branch-side insulation wire core 6 by the pressure contact connector 21.

  One pressure contact connector 21 is used at each branch connection location. That is, as many pressure contact connectors 21 as the number of branch connection locations are prepared. The pressure contact connector 21 includes a housing 22 having insulating properties and a pressure contact blade 23 having conductivity.

  The housing 22 includes a first housing 22a that holds the press contact blade 23, and a second housing 22b that is attached to the first housing 22a. The first housing 22a has a U-shaped cross section, and wire core outlets 22c are formed at both ends thereof. The wire core outlet 22c has a width equal to or more than two insulated wire cores. A holding portion (not shown) for the press contact blade 23 is also formed in the first housing 22a. The second housing 22b is a lid-like member, and a pair of wire core pushing portions 22d are formed on the inner surface. The outer surface of the second housing 22b is formed as a pressing surface 22e.

  The press contact blade 23 is inserted and held in a holding portion (not shown) of the first housing 22a. The press contact blade 23 is formed with two press contact portions 23a arranged side by side for an insulation wire core and for a branch side insulation wire core.

  The formation of the branch connection location will be described. In forming the branch connection portion, first, an intermediate portion of the insulating wire core 4 is placed on one press contact portion 23a of the press contact blade 23, and an end portion of the branch side insulation wire core 6 is placed on the other press contact portion 23a. I do. Next, an operation of setting the second housing 22b with respect to the first housing 22a in such a state that the insulating core 4 and the branch-side insulating core 6 are sandwiched between the core push-in portion 22d and the pressure contact portion 23a is performed. Finally, the operation of fitting the second housing 22b to the first housing 22a by pressing the pressing surface 22e of the second housing 22b is performed. Thereby, the insulation wire core 4 and the branch side insulation wire core 6 are pressure-contacted collectively. The branch connection point is insulated from the surroundings by the housing 22 of the pressure connector 21. The formation of the branch connection place using the pressure connector 21 is completed.

  When the insulation wire core 4 and the branch side insulation wire core 6 are heat-resistant electric wires such as communication wires, the press-connecting connector 21 has heat resistance in the housing 22 in order to ensure heat resistance (insulation properties). And the housing 22 is molded using a heat-resistant synthetic resin material). In addition, when not giving heat resistance, it is also possible to wind a heat-resistant tape and to form a branch connection location.

  A self-bonding tape 14 is wound around the exposed portion 3 including the branch connection portion. Further, a presser winding tape 15 is wound around this outer side, and a shield 16 (in the case of a shield) is applied. Further, on the outside, a resin mold portion 25 is provided over the sheaths 2 and 24 of the trunk cable 1 and the branch cable 5. The exposed part 3 is covered with a resin mold part 25. The resin mold portion 25 is formed by molding with a resin such as vinyl chloride.

  As described above with reference to FIGS. 1 and 2, according to the present invention, it is not necessary to cut the insulation core 4 of the trunk cable 1 at the time of branch connection, and the insulation wire of the trunk cable 1 is not necessary. The insulation 4 of the branch side insulated wire core 6 of the core 4 and the branch cable 5 is not required to be peeled off. Moreover, according to this invention, it has the structure where the two of the insulated wire core 4 and the branch side insulated wire core 6 are press-contacted collectively. Therefore, the present invention has a structure in which the branch connection location is highly reliable.

  According to the present invention, since the insulation of the branch connection portion is performed by the housing 22 of the pressure connector 21, it is unnecessary to tape the insulation wire core 4 and the branch side insulation wire core 6 one by one. . Therefore, the present invention has a structure in which the working time is shortened. In other words, the workability is improved.

  According to the present invention, since the exposed portion 3 is protected by the resin mold portion 25 covering the exposed portion 3, it is unnecessary to wrap the protective tape over a wide range. Therefore, the present invention has a structure in which the working time is shortened. In other words, the workability is improved.

  In addition, it goes without saying that the present invention can be variously modified without departing from the spirit of the present invention.

It is a schematic explanatory drawing which shows one Embodiment of the branch connection structure of the cable of this invention. (A) is a plan view of the pressure contact connector (second housing omitted), and (b) is a cross-sectional view of the pressure contact connector. It is a schematic explanatory drawing of the branch connection structure of the cable of a prior art example. It is a schematic explanatory drawing of the branch connection location of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Trunk cable 2 Sheath 3 Exposed part 4 Insulated wire core 5 Branch cable 6 Branch side insulated wire core 21 Pressure connector 22 Housing 22a First housing 22b Second housing 22c Wire core lead-out port 22d Wire core pushing part 22e Press surface 23 Pressure contact blade 23a Pressure contact part 24 Sheath 25 Resin mold part

Claims (2)

In the branch connection structure of the cable in which a plurality of insulation cores constituting the trunk cable are exposed in the middle of the trunk cable, and a plurality of branch side insulation cores constituting the branch cable are connected to the exposed portion,
Each branch connection location of the plurality of insulated wire cores and the plurality of branch side insulated wire cores is individually press-contacted by a press-connecting connector,
The press contact connector comprises an insulating housing and a conductive press contact blade,
The housing is
The first housing formed in a U-shaped cross-section, forming a wire core outlet having a width equal to or more than two insulated wire cores at both ends, and forming a holding portion for the press contact blade; A lid-like member attached to the first housing and covering the first housing, the second housing formed with a pair of wire core pushing portions on the inner surface,
The press contact blade is
Two side-by-side press contact portions for the insulated wire core and the branch side insulated wire core are formed, and are inserted and held in the holding portion of the first housing,
The exposed portion including the pressure contact connector includes:
Self-adhesive tape is wound, the self-bonding tape presser outwardly winding tape wound et al is, on the outside of the presser winding tape, a resin mold portion is provided extending over the sheath of the trunk cable and the branch cable And the exposed part is covered with the resin mold part. In the branch connection structure of the cable according to claim 1,
The cable branch connection structure, wherein the housing has heat resistance.

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