JPH0613345U - Unit cable branch connection - Google Patents

Abstract

(57) [Abstract] [Purpose] Insulate the branch connection between the conductor of the branched line and the conductor of the branch line crimped and fixed with a crimp connector easily and securely without wrapping the insulation tape. To obtain a unit cable of consistent quality regardless of the injection pressure. A plurality of rows of separators having pin-shaped projections standing upright at predetermined intervals are provided on a flat plate, and a connecting portion connecting a conductor of a trunk line and a conductor of a branch line is housed in a branch passage of the separator. The separator, a part of the main line, the branched connection part, and a part of the branch line are molded by resin.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a branch portion of a unit cable, and in particular, requires no skill to wind an insulating tape around a branch connection portion between a conductor of a branched wire and a conductor of a branched wire crimped and fixed by a crimp connector, and requires skill. The present invention relates to a branch connection part of a unit cable that can be easily insulated without being affected by injection pressure and can always obtain a unit cable of constant quality.

[0002]

[Prior art]

 With the unitization of housing in recent years, construction materials have been unitized, most of the construction material units are manufactured at the housing supplier's factory, and blocks of each unit are assembled and constructed on site. Even in the case of indoor wiring in such a unit housing system, an electrician cut multiple cables to be connected, peeled off the covering material of the terminal, and connected each terminal using a crimp connector at the site such as in the ceiling. After that, insulation treatment is applied. However, the site space such as the ceiling is small, and it takes more time than necessary to carry out wiring such as cable connection processing in such a narrow place, complete cable connection, insulation of the connection part, etc. In terms of, it was a cause of lack of quality safety. Moreover, when resin molding is applied to the processing of the cable connection part, it takes a long time to carry out the molding work when installing the cable connection part by bringing a vulcanization mold etc. to the site, which is not practical. There was a problem.

Therefore, in recent years, in order to improve workability, a housing harness (unit cable) formed by pre-assembling branch connection processing of cables has been developed.

The branch portion 200 of the unit cable that has been subjected to the conventional branch connection processing has a structure as shown in FIG. That is, the sheath and the insulator of the branched electric wire 210 are partly peeled off to expose the conductor 220. On the other hand, the sheath and the insulator of the electric wire 230 connected to the electric wire 210 are partly peeled off to expose the conductor 240. Then, the conductor 220 and the conductor 240 are crimp-connected by a crimp connector 250, and an insulating material 260 is wrapped around the conductor 220 and the whole of the sheath portion of the electric wire 210 to the sheath portion of the electric wire 230 is mold-coated with a synthetic resin material. Then configured. As the insulating material 260, a heat shrinkable tube, a self-fusing tape, an insulating cap, or the like is used. 270 and 280 are mounting flanges, which are formed on both ends of the branch portion 200 by resin molding.

[0005]

[Problems to be solved by the device]

 As described above, the branch connection portion of the conventional unit cable has the branching electric wire 230 with the sheath and the insulator exposed to expose the conductor 220, similarly to the branching electric wire 210 with the sheath and the insulator exposed to expose the conductor 220. Are connected by pressure using a crimping connector 250, and a plurality of connecting portions in which an insulating material 260 is wound so as to cover the crimping connector 250 are put together, and the whole is mold-coated with a synthetic resin material. For this reason, the branch conductor connecting portion crimped and connected by the crimping connector 250 may be offset in one of the vertical directions due to the injection pressure of the resin during resin molding. The offset of the branch conductor connection part reduces the thickness of the mold with respect to the branch conductor connection part.If the offset of the branch conductor connection part is severe, the branch conductor connection part pops out on the surface of the resin mold part. However, there is a problem in that it is not possible to obtain consistent quality.

The present invention has been made in view of the above problems of the prior art. The object of the present invention is to provide a branched wire conductor and a branched wire conductor that are crimped and fixed by a crimp connector. It is possible to easily and reliably insulate the branch connection part of the product without wrapping insulating tape without the need for skill, and it is possible to obtain a unit cable of consistent quality regardless of the injection pressure. It is intended to provide a branch connection part of a unit cable that can be reduced.

[0007]

In order to achieve the above object, the branch connecting portion of the unit cable of the present invention is provided with a plurality of rows of separators each having a pin-shaped projection standing on a flat plate at a predetermined interval. A connecting portion connecting a conductor of the main line and a conductor of the branch line is housed in a branch passage of the separator, and the separator, a part of the main line, the connecting portion of the branch connection, and one of the branch lines. Parts are resin-molded.

Further, in order to achieve the above object, the branch connecting portion of the unit cable of the present invention comprises a trunk line in a branch passage of a separator in which a partition wall provided with a plurality of notches at predetermined intervals is erected on a flat plate. The connection part connecting the conductor of FIG. 1 and the conductor of the branch line is housed, and the separator, the part of the main line, the branch-connected connection part, and the part of the branch line are resin-molded. .

Further, the branch connection part of the unit cable of the present invention comprises a conductor of a main line and a conductor of a branch line in a branch path of a separator in which a partition wall provided with a plurality of notches at predetermined intervals is erected on a flat plate. A cover that holds the connecting part that connects the connector and presses the branch conductor connecting part that is housed in the branch of the separator, and a separator that covers the cover, a part of the main line, and The connection part branched and connected and a part of the branch line are resin molded.

Then, it is preferable to provide a mounting tool for wall mounting on a side portion of the separator.

[0011]

[Action]

 The sheath and the insulator at the connecting portion of the trunk line are peeled off to expose the conductor, and the sheath and the insulator at the tip of the branch line connected to the trunk line are stripped off to expose the conductor. After that, the main line conductor and the branch line conductor are crimped and fixed by a crimp connector to connect them. The connection part connected by this crimping connector is housed in a branch path of a separator which forms a branch path by arranging pin-shaped projections on a flat plate at predetermined intervals so that the connection parts do not come into contact with each other. Then, the separator, a part of the main line, a branched connection part, and a part of the branch line are resin-molded. At this time, the separators are installed so as to form a row with pin-shaped projections standing at a predetermined interval, so when the molding resin is filled, the molding resin penetrates between the pin-shaped projections and spreads to the details. , The quality can be kept constant.

Further, the conductor and the insulator at the connecting portion of the main line are peeled off to expose the conductor, and the sheath and the insulator at the tip of the branch line connected to the main line are peeled off to expose the conductor. Then, the conductor of the main line and the conductor of the branch line are crimped and fixed by a crimp connector to be connected. The connecting parts connected by this pressure-fitting connector are stored on a flat plate so that each connecting part does not come into contact with the inside of the branching path of a separator that has a plurality of cutouts and stands up at predetermined intervals to form a branching path. To do. Then, the separator, a part of the main line, a branch connection part, and a part of the branch line are resin-molded. At this time, since a plurality of cutouts are provided in the partition wall that constitutes the separator, when the molding resin is sealed, the molding resin can pass through the plurality of cutouts provided in the partition wall to reach the details. Quality can be kept constant.

[0013] Furthermore, the connecting portions connected by the crimp connector are erected at predetermined intervals with partition walls having a plurality of cutouts formed on a flat plate to form branching passages. After storing it so as not to touch it, cover the cover that holds down the branch conductor connecting portion stored in the branch passage of this separator. Then, the separator that covers the lid, a part of the main line, a branch-connected conductor, and a part of the branch line are resin-molded. Even when the separator is covered with the lid when this resin is molded, since the partition wall that constitutes the separator has a plurality of notches, the molding resin is provided on the partition wall when the molding resin is sealed. Through the multiple cutouts, it is possible to reach every detail and keep the quality constant.

[0014]

【Example】

 Embodiments of the present invention will be described below. << First Embodiment >> FIG. 1 shows a first embodiment of a branch connecting portion of a unit cable according to the present invention.

In the figure, reference numeral 1 is a branch connection portion of a unit cable. 3 is a power supply line, and the branch line 2 is connected for each phase. In this embodiment, the number of branch lines 2 is 6, and the number of lines in the branch portion is 7, including the number of branch lines 2 and the power supply line 3. The branch wire 2 exposes the conductor 4 by peeling off the sheath and the insulator for a predetermined distance from the tip of the wire. Further, also for the power supply line 3, the conductor and the conductor 5 are exposed by peeling the sheath and the insulator for a predetermined distance from the tip of the power supply line 3. Then, the conductors for each phase are assembled and crimp-connected by the crimp connector 6.

Reference numeral 7 denotes a separator for separating the connecting portion between the branch line 2 and the power supply line 3 so that the connecting portions do not contact each other. 8 is a bottom plate formed in a flat plate shape, and 9, 10, 11, 12 are a plurality of pin-shaped projections 9A to 9F, 10A to 10F, 11A to 11F, 12A to 12F on the bottom plate 8 with a predetermined interval. (6 in this embodiment) The pin projection row is provided and formed. In this standing partition wall, the branch passage 13 is formed by the pin projection row 9 and the pin projection row 10, the branch passage 14 is formed by the pin projection row 10 and the pin projection row 11, and the pin projection row 11 and the pin projection row 12 are formed. The branch paths 15 are formed by and.

Reference numerals 16 and 17 denote attachments for attaching the branch portion 1 of the unit cable to the indoor wall surface. The fittings 16 and 17 are provided with screw holes 18 and 19 into which screws (not shown) are fitted.

When connecting the conductor 4 of the branch line 2 and the conductor 5 of the power line 3, first, the sheath 4 and the insulator are separated by a predetermined distance from the tip of the branch line 2 to expose the conductor 4, and the power line 3 is exposed. Also, the conductor and the conductor 5 are exposed by peeling off the sheath and the insulator for a predetermined distance from the tip of the power line 3. Then, the conductor 4 and the conductor 5 are crimp-connected by the crimp connector 6 for each phase of the wire core, and then, as shown by arrows A, B, and C in FIG. The crimp connections 13, 14 and 15 formed by the rows 9, 10, 11 and 12 are fitted in separate crimps so that their crimp connections do not come into contact with one another.

The branch connecting portion formed by fitting into the branch passages 13, 14, 15 of the separator 7 is made of the synthetic resin 20 by the molding die shown in FIGS. 3 and 4. Resin molded. In the figure, reference numeral 21 denotes a lower mold, which constitutes the lower mold of the branch connection portion of the unit cable. Reference numeral 22 denotes a lower mold storage part for storing the power supply line 3 serving as the main line and the pressure connection part of the plurality of branch lines 2. Reference numeral 23 denotes a concave portion, which is formed in a U-shape and is provided at the approximate center of one end portion of the lower die storage portion 22. Reference numeral 24 denotes a concave portion, which is formed in a U shape like the concave portion 23 and is provided substantially at the center of the other end portion of the lower mold housing portion 22. Reference numeral 25 is a pin, which is provided upright in the recess 23. Reference numeral 26 is a pin, which is provided upright in the recess 24. Numeral 27 is a hole for enclosing the resin in the storage unit 11.

Reference numeral 28 denotes an upper die, which constitutes an upper die of the branch connection portion of the unit cable, and the upper die 28 and the lower die 21 form a resin mold die of the branch connection portion of the unit cable. I am configuring. The upper mold 28 has a structure as shown in FIG. That is, reference numeral 29 denotes an upper mold storage part, which is a part where the power supply line 3 serving as a main line and the crimp connection part of the plurality of branch lines 2 are stored together with the lower mold 21. Reference numeral 30 denotes a concave portion, which is formed in a U-shape and is provided substantially at the center of one end portion of the upper die accommodating portion 29. The recess 30 has the same shape as the recess 23 of the lower mold 21.

Reference numeral 31 denotes a step forming projection, which is formed in a cylindrical shape and contacts the upper end of the fixture 16 of the bottom plate 8 when the upper die 28 is superposed on the lower die 21. It is for forming a step. Reference numeral 32 denotes a positioning protrusion, which is formed in a pin shape and has a spherical tip. The positioning protrusion 32 is formed with a diameter large enough to fit in the screw hole 18 formed in the fixture 16 of the bottom plate 8, and the upper die 28 is superposed on the lower die 21. At this time, the positioning protrusion 32 is fitted in the screw hole 18 of the fixture 16 of the bottom plate 8 to position the upper die 28 and the step forming protrusion 31. Reference numeral 33 denotes a concave portion, which is formed in a U-shape and is provided at the substantially center of the other end portion of the upper die accommodating portion 29. The recess 33 has the same shape as the recess 24 of the lower mold 21.

Reference numeral 34 denotes a step portion forming projection portion, which is formed in a cylindrical shape like the step portion forming projection portion 31 and has a diameter larger than that of the screw hole 19 formed in the fixture 17 of the bottom plate 8. There is. The step forming projection 36 is for contacting the upper end of the fixture 17 of the bottom plate 8 when the upper die 28 is superposed on the lower die 21 to form a step. Reference numeral 35 denotes a positioning protrusion, which has a pin shape and a spherical tip. The positioning protrusion 35 is formed with a diameter large enough to fit in the screw hole 19 formed in the fixture 17 of the bottom plate 8, and the upper die 28 is superposed on the lower die 21. At this time, as shown in FIG. 4, the positioning protrusion 35 is fitted into the screw hole 19 of the fixture 17 of the bottom plate 8 to position the upper die 28 and the step forming protrusion 34.

Reference numeral 36 denotes a cable retainer, which is a power supply line 3 and a plurality of branch lines that are main lines that come into contact with the ends of the upper mold 28 and the lower mold 21 and project from the upper mold storage 29 and the lower mold storage 22. This is to hold down the crimp connection part 2 and to prevent the resin from jumping out when the resin is injected into the upper and lower molds. The cable retainer 36 is composed of two retainer plates, a retainer plate 37 and a retainer plate 38. Reference numerals 39 and 40 are grooves into which the power supply line 3 and the plurality of branch lines 2 are fitted.

As described above, the branch connection portion 41 of the unit cable molded by resin molding with the upper die 28 and the lower die 21 has unit cable attachment portions 42 and 43 at both ends as shown in FIG. Have The crimping connection portion fitted into the branch passages 13, 14 and 15 of the separator 7 is extended from the sheath portion of the branch wire 2 to the sheath portion of the power supply wire 3 by a molding die as shown in FIG. The whole is mold-coated with a synthetic resin 20. When the resin is pressurized and sealed in the molding die, the separators 7 do not come into contact with each other by the pressure-bonded connecting portions adjacent to each other. The branch passages 13, 14, 15 are formed slightly narrower than the thickness of the crimp connection portion, and the branch passages 13, 14, 15 are formed slightly narrower than the thickness of the crimp connection portion by crimping. The connection portion is press-fitted into the branch passages 13, 14, 15 so that a more pressing effect can be provided.

<< Second Embodiment >> FIG. 6 shows a second embodiment of the branch connection portion of the unit cable according to the present invention.

In the figure, reference numeral 50 is a branch connection portion of the unit cable. Reference numeral 3 is a power supply line, which connects the branch line 2 for each phase. The number of branch lines 2 is 6 as in the first embodiment shown in FIG. 1, and the number of branch lines is 7, including the number of branch lines 2 and the number of power lines 3. The branch line 2 exposes the conductor 4 by peeling off the sheath and the insulator for a predetermined distance from the tip of the wire. Also, with respect to the power supply line 3, the sheath 5 and the insulator are peeled off from the tip of the power supply line 3 by a predetermined distance to expose the conductor 5. Then, the conductors for each phase are assembled and crimp-connected by the crimp connector 6.

Reference numeral 51 denotes a separator for separating the connecting portion between the branch line 2 and the power supply line 3 from each other so that the connecting portions do not contact each other, like the separator 7 shown in FIG. 1 according to the first embodiment. It is a thing. Reference numeral 52 is a bottom plate formed in a flat plate shape, and 53, 54, 55, 56 are partition walls standing upright on the bottom plate 52 at a predetermined interval. The partition wall 58 and the partition wall 55 form a branch path 58, and the partition wall 55 and the partition wall 56 form a branch path 59, respectively. The partition wall 53 is provided with a plurality of mountain-shaped notches 60 (two in this embodiment). Similarly, the partition wall 54 is provided with a mountain-shaped notch 61, the partition wall 55 is provided with a plurality of mountain-shaped notches 62, and the partition wall 56 is provided with a plurality of mountain-shaped notches 63 (two in this embodiment). There is.

Reference numerals 16 and 17 denote attachments for attaching the branch portion 1 of the unit cable to an indoor wall surface. The fittings 16 and 17 are provided with screw holes 18 and 19 into which screws (not shown) are fitted.

When connecting the conductor 4 of the branch line 2 and the conductor 5 of the power supply line 3, first, the sheath 4 and the insulator are separated by a predetermined distance from the tip of the branch line 2 to expose the conductor 4, and the power supply line 3 is exposed. Also, the conductor and the conductor 5 are exposed by peeling off the sheath and the insulator for a predetermined distance from the tip of the power line 3. Then, the conductor 4 and the conductor 5 are crimp-connected by the crimp connector 6 for each phase of the wire core, and then, as shown by arrows D, E, and F in FIG. The branches 57, 58, 59 formed by 53, 54, 55, 56 are fitted in separate branches so that their crimp connections do not contact each other.

The branch connecting portion formed by fitting into the branch passages 57, 58, 59 of the separator 51 is made of synthetic resin 20 (see FIG. 6) by a molding die as shown in FIGS. 3 and 4. Are resin-molded by (not shown).

<< Third Embodiment >> FIG. 7 shows a third embodiment of the branch connecting portion of the unit cable according to the present invention.

In the figure, reference numeral 70 denotes a separator for separating the crimp connection portion using the crimp connector 6 of the branch line 2 and the power supply line 3 shown in FIG. 1 so that the crimp connection portions do not contact each other. Thus, it is exactly the same as the separator 51 described in FIG. 71 is a bottom plate formed in a flat plate shape, and 72, 73, 74, and 75 are partition walls that stand upright on the bottom plate 71 with a predetermined interval, and the partition wall 72 and the partition wall 73 form a branch path 76. A branch passage 77 is formed by 73 and the partition wall 74, and a branch passage 78 is formed by the partition wall 74 and the partition wall 75. The partition wall 72 is provided with a plurality of mountain-shaped notches 79 (two in this embodiment). Similarly, the partition wall 73 is provided with a mountain-shaped notch 80, the partition wall 74 is provided with a plurality of mountain-shaped notches 81, and the partition wall 75 is provided with a plurality of mountain-shaped notches 82 (two in this embodiment). There is.

Reference numerals 83, 84, 85 and 86 (84 is hidden and not shown in FIG. 7) are engaging portions, and the engaging portions 83 and 84 are provided at both lower end portions of the partition wall 72. 85 and 86 are provided at both lower end portions of the partition wall 75. Reference numerals 87 and 88 denote attachments for attaching the branch portion 1 of the unit cable to an indoor wall surface.

Reference numeral 90 is a lid for covering the separator 70. Since the separator 70 is open at the top, the lid 90 covers and locks the connecting portions of the electric wires fitted in the branch passages 76, 77, and 78 of the separator 70 so as not to pop out. In the figure, 91 is a top plate formed in a flat plate shape, and 92, 93, 94, and 95 are locking rods provided upright at the four corners of the top plate 91. Reference numerals 96, 97, 98 and 99 are claws, which are provided at the tips of the locking rods 92, 93, 94 and 95. The claw portions 96, 97, 98, 99 are configured to engage with the engaging portions 83, 84, 85, 86, respectively, as shown in FIG.

By thus covering the upper portion of the separator 70 with the lid 90, the connecting portion is reliably surrounded in the left-right and up-down directions, and even if the connecting portion moves due to the injection pressure, it is within that range. It can only move and can be reliably molded.

Reference numerals 100 and 101 denote holes, which are formed so that the molding resin sufficiently flows into the separator 90 when resin molding is performed with the synthetic resin 20 using a molding die as shown in FIG. Is.

If the space between the bottom plate 71 of the separator 70 and the top plate 91 of the lid 90 is made smaller than the mold thickness, the lid 90 is completely contained in the mold and the appearance is improved.

[0038]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects.

In the branch connection portion of the unit cable according to claim 1, a plurality of rows of separators each having pin-shaped protrusions standing upright at predetermined intervals are provided on a flat plate, and a main conductor is provided in a branch path of the separator. Since the connection part connecting the conductor of the branch line is housed, and the separator, the part of the main line, the branch connection part, and the part of the branch line are formed by resin molding. , The branch connection between the main conductor and the branch conductor crimped and fixed by the crimp connector can be easily and reliably insulated without wrapping the insulation tape without the need for skill, and is independent of the injection pressure. It is possible to always obtain a unit cable of constant quality, and further reduce the processing man-hours.

In the branch connection portion of the unit cable according to the second aspect, the conductor of the main line and the conductor of the branch line are provided in the branch path of the separator in which a partition wall provided with a plurality of notches at predetermined intervals is erected on a flat plate. Since the connection portion connecting to and is housed and the separator, a part of the main line, the branch-connected connection portion, and a part of the branch line are resin-molded to configure, a crimp connector is used. The branch connection between the crimp-fixed main conductor and the branch conductor can be easily and reliably insulated without the need for wrapping insulating tape, and the quality is always constant regardless of the injection pressure. The unit cable can be obtained, and the number of processing steps can be reduced.

In the branch connection part of the unit cable according to claim 3, the conductor of the main line and the conductor of the branch line are provided in a branch path of a separator in which a partition wall provided with a plurality of notches at predetermined intervals is erected on a flat plate. And a connection part that stores the connection part and that is stored in the branch passage of the separator. A cover that presses down the branch conductor connection part is covered, a separator that covers the cover part, a part of the main line, and Since the branch connection and a part of the branch line are molded with resin, the branch connection between the main line conductor and the branch line conductor crimped and fixed with a crimp connector must be wrapped with insulating tape. In addition, it is possible to easily and reliably insulate without requiring skill, and it is possible to obtain a unit cable of consistent quality regardless of the injection pressure, and it is possible to further reduce the number of processing steps.

In the branch connection portion of the unit cable according to claim 4, since the mounting portion for wall surface mounting is provided on the side portion of the separator, it can be easily mounted anywhere in a short time. .

[Brief description of drawings]

FIG. 1 is an assembly configuration diagram showing a first embodiment of a branch connection portion of a unit cable according to the present invention.

FIG. 2 is a partially cutaway sectional view showing a branch connection portion of a resin-molded unit cable.

FIG. 3 is a perspective view of the entire configuration of a resin molding die that molds a branch connection portion of the unit cable shown in FIG. 1 with a resin.

FIG. 4 is an overall perspective view of an upper die of the resin mold die shown in FIG.

5 is an overall perspective view of a branch connecting portion of a unit cable resin-molded by the resin mold shown in FIG.

FIG. 6 is an assembly configuration diagram showing a second embodiment of the branch connection portion of the unit cable according to the present invention.

FIG. 7 is an assembly configuration diagram showing a third embodiment of the branch connection portion of the unit cable according to the present invention.

8 is a partially cutaway sectional view of a branch connection portion of the unit cable shown in FIG. 7, which is resin-molded.

FIG. 9 is a partially cutaway sectional view of a branch portion of a conventional resin-molded unit cable.

[Explanation of symbols]

1,50 ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… ………………………………………… Power line 6 ……………………………………………… Crimp connector 7,51,70 …………………… ………… Separator 8,52,71 ……………………………… Bottom plate 9,10,11,12 …………………… Pin projection row 9A-9F, 10A-10F, 11A-11F, 12A
~ 12F ………… Pin-shaped projection 13,14,15,57,58,5976,77,78
………………………………… Branch 16, 17, 87, 89 ……………… Fixing fixture 20 ………………………………………… Synthetic resin 53, 54, 55, 56, 72, 73, 74, 75 ...
……………… Partition walls 60, 61, 62, 63, 79, 80, 81, 82 ……
……………… Engaging part 80 ……………………………………………… Lid 81 ………………………………………… Top plate 82 , 83, 84, 85 ……………… Locking rods 86, 87, 88, 89 ……………… Claws

Claims (4)

[Scope of utility model registration request] 1. A plurality of rows of separators are provided on a flat plate, in which pin-shaped projections are provided upright at predetermined intervals, and a connecting portion connecting a conductor of a trunk line and a conductor of a branch line is housed in a branch passage of the separator. A branch connection part of a unit cable formed by resin-molding the separator, a part of the main line, the branch connection part, and a part of the branch line. 2. A separator connecting a main line conductor and a branch line conductor to each other is housed in a branch path of a separator in which a partition wall provided with a plurality of notches at predetermined intervals is erected on a flat plate. And a branch connection part of a unit cable formed by resin-molding a part of the trunk line, the connection part that is branched and connected, and a part of the branch line. 3. A separator connecting a main line conductor and a branch line conductor is housed in a branch path of a separator in which a partition wall provided with a plurality of notches at predetermined intervals is erected on a flat plate. A cover for pressing down the branch conductor connecting part housed in the branch passage, a separator covering the cover, a part of the main line, the branch-connected connecting part, and one of the branch lines. Branch connection part of the unit cable that is molded with resin. 4. A branch connecting portion for a unit cable, which is provided with a wall mounting fixture on a side portion of the separator.