JP2015056327A - Unit cable and method of producing unit cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a unit cable excellent in workability and productivity and a method of producing a unit cable.SOLUTION: A wire connection part 11 is formed by connecting specified conductors 9 electrically. The wire connection part 11 is formed by welding. The formation of the connection part 11 constitutes a specified electric circuit. The formation of the wire connection part 11 is completed by executing, in order, middle peeling of a sheath 8 and an insulator 10 and mutual welding of the conductors 9. The welding is feasible even when the range of the peeling is narrow, so the wire connection part 11 and its periphery are formed small. The wire connection part 11 is covered with a resin mold part for protection. The resin mold part is formed by injection molding by using a resin material having insulation properties.

Description

  The present invention relates to a unit cable used for indoor wiring and a method for manufacturing the unit cable.

  In recent years, room units that are unitized for each room such as an entrance, a living room, and a bedroom are manufactured at a factory of a housing manufacturer. Then, the manufactured room units are assembled at the construction site according to the desires of the owner and the site shape, and this assembly completes one house. Such a construction method is called a prefabricated house construction method and is generally widely known. In the prefabricated house construction method, unit cables are used in order to simplify indoor wiring work for each room unit. A joint box or the like is provided at the connection portion of the unit cable.

  Regarding the part where the joint box is provided, in Patent Document 1 below, an insulating thermosetting resin (such as an epoxy resin) is filled and molded inside the joint box. By connecting and molding the thermosetting resin, the connection portion of the branch unit cable is fixed and protected.

  Similarly, in Patent Document 2 below, the connection portion of the unit cable is fixed and protected. Specifically, the conductor of the VVF cable cut to the design length is connected by a crimp terminal to constitute a target electric circuit. Thereafter, the crimping terminal is covered with an insulating tube to be insulated, and the connection portion as a connection portion is accommodated in the joint box. And a connection part is fixed and protected by filling and molding of thermosetting resin.

  The unit cable is pre-branched at the construction site in advance, so (1) labor saving construction, (2) shortening the construction period, and (3) stable high quality can be obtained. Have

Registered Utility Model No. 3005912 JP 2005-322443 A

  Since the conventional unit cable is a factory processed product, it must be transported to the construction site. Therefore, it can be protected even if an external force such as a tensile load is applied to the connection part during transportation, and the connection part can be protected because there is a concern that an external force is applied even during construction. Thus, the structure which provides a big joint box and filling and mold of thermosetting resin is employ | adopted.

  Therefore, regarding the construction, there is a problem that a space for installing a large joint box is required, and since it is a large joint box, there is a problem that handling property at the time of construction is deteriorated. Moreover, since it is a large joint box in which resin is molded, it is heavy and has the problem that the handleability at the time of construction is deteriorated as described above. In addition, the amount of resin used is increased, and there is a problem that a large facility is required, and a large facility causes a problem that productivity is lowered.

  This invention is made | formed in view of an above-described situation, and makes it a subject to provide the manufacturing method of a unit cable excellent in workability and productivity, and a unit cable.

  In order to solve the above-mentioned problem, the present invention according to claim 1 is directed to a unit cable in which predetermined conductors in a plurality of VVF cables are electrically connected to each other, and the connection portion is a connection portion. A space distance portion for providing a spatial distance is formed between the matching connection portions, and the connection portion itself is formed by welding the conductors.

  According to the present invention having such a feature, since the connection portion is formed by welding the conductors, the connection portion between the conductors can be formed relatively small. Since adjacent connection parts have a space distance part between them, insulation is ensured.

  According to a second aspect of the present invention, in the unit cable according to the first aspect, the connection portion is covered with a resin mold portion formed by molding an insulating resin.

  According to the present invention having such a feature, since the connecting portion is formed relatively small as described above, the resin mold portion covering the connecting portion can also be formed small. According to the present invention, since the spatial distance portion is filled with the resin, it is reliably insulated.

  According to a third aspect of the present invention, in the unit cable according to the first or second aspect, adjacent connection portions are partitioned by an insulating partition disposed in the spatial distance portion.

  According to the present invention having such characteristics, the connection portions are partitioned (separated), so that they are reliably insulated.

  Moreover, the manufacturing method of the unit cable of this invention of Claim 4 made | formed for solving the said subject is welding the connection part formed by electrically connecting the predetermined conductors in several VVF cables. And forming the resin mold portion outside the connection portion by covering the connection portion by molding an insulating resin.

  According to the present invention having such a feature, a unit cable having a relatively small connection portion can be manufactured.

  In addition, regarding the manufacturing method of a unit cable, you may characterize like following (1)-(3). That is,

  (1) It includes a step of forming a connection portion formed by electrically connecting predetermined conductors in a plurality of VVF cables by welding.

  (2) In the above (1), the method further includes a step of covering the connection portion by molding an insulating resin and forming a resin mold portion outside the connection portion.

  (3) In the above (1) or (2), the method further includes a step of inserting an insulating partition wall between adjacent connection portions.

  According to the first aspect of the present invention, since the conductors are welded together to form the connection portion, there is an effect that the connection portion can be formed smaller than before. Thereby, it is possible to reduce the size of the unit cable, and there is an effect that it is not necessary to secure a large space during construction. Moreover, since it is small, there is also an effect that the handleability can be improved as compared with the conventional case. Furthermore, since the conductors are welded together to form the connection portion, there is an effect that the processing time can be shortened as compared with the conventional case. Therefore, according to this invention, there exists an effect that the unit cable excellent in workability and productivity can be provided.

  According to the second aspect of the present invention, in addition to the effect of the first aspect, the following effect is also achieved. That is, there is an effect that the connection part can be protected by the resin mold part. Moreover, since it is a small connection part, there exists an effect that it can insulate and protect with the minimum amount of resin, and an effect that size reduction of a manufacturing facility can be achieved. Therefore, according to the present invention, it is possible to provide a unit cable excellent in productivity as well as protecting the connection portion.

  According to the present invention described in claim 3, in addition to the effect of claim 1 or 2, the following effect is also achieved. That is, there is an effect that the insulation between the connection portions can be secured by the partition walls.

  According to the present invention described in claim 4, since it includes the step of forming the connection portion by welding and the step of forming the resin mold portion outside the connection portion, it is excellent in workability and productivity. There is an effect that a method for manufacturing a unit cable can be provided.

(Example 1) which is the perspective view of the connection part and peripheral part of a unit cable of this invention. It is an enlarged view of a connection part. It is a front view of the resin mold part in a unit cable. It is a perspective view of the connection part of a unit cable used as another example, and a peripheral part (example 2). It is an enlarged view of the connection part and partition of FIG.

  The unit cable has a connection portion formed by electrically connecting predetermined conductors in a plurality of VVF cables, and this connection portion is formed by welding. In addition, the unit cable has a resin mold part that covers the connection part on the outside of the connection part.

  Embodiment 1 will be described below with reference to the drawings. FIG. 1 is a perspective view of a connecting portion and a peripheral portion of a unit cable of the present invention. FIG. 2 is an enlarged view of the connection portion, and FIG. 3 is a front view of the resin mold portion in the unit cable.

  In FIG. 1, reference numeral 1 indicates a unit cable of the present invention. This unit cable 1 is used for indoor wiring, and has three VVF cables 2 to 4 (the number is an example). Three VVF cables 2 to 4 having the same configuration are used in this embodiment. Hereinafter, the configuration and structure will be described using the VVF cable 2 as a representative example.

  The VVF cable 2 is a flat vinyl insulated vinyl sheath cable used for a power circuit of 600 V or less, and includes three insulated wire cores 5 to 7 and a sheath 8 that collectively covers these. The VVF cable 2 has three cores in the present embodiment, but may have two cores or four cores.

  The three insulated wire cores 5-7 have the same configuration. Taking the insulated wire core 5 as a representative example, the insulated wire core 5 includes a conductor 9 and an insulator 10. The conductor 9 is made of a conductive metal material. Specifically, an annealed copper wire that conforms to or conforms to JIS C 3102 (electric annealed copper wire) is used. A single core wire is used for the conductor 9. The conductor 9 is formed in a circular cross section.

  The insulator 10 is formed by extruding an insulating resin material on the outer surface of the conductor 9. The insulator 10 is formed in a circular cross section with a predetermined thickness. Vinyl is used as the resin material. In addition, in order to identify the three insulated wire cores 5 to 7, it is assumed that the colors are black, white, and red.

  The sheath 8 is formed by extruding the outer surfaces of the three insulated wire cores 5 to 7 in parallel. The sheath 8 is formed in an oval cross section with a predetermined thickness. Vinyl is used as the resin material of the sheath 8.

  The VVF cable 2 as described above is cut so that the length of this cable is two (the cable length is an example). In the VVF cable 2, the middle of the sheath 8 and the insulator 10 is peeled, and a connection portion 11 is formed with respect to the exposed conductor 9.

  1 and 2, the connection part 11 is formed by electrically connecting predetermined conductors 9 to each other. That is, the connection part (connection point) corresponds, and this part is formed by welding. Welding is a connection method such as resistance welding, and electrical connection is completed by melting a metal material at a local point. Since the connection part 11 is formed by connecting predetermined conductors 9 by welding as described above, the connection part 11 is not easily bent. Therefore, it is fixed in the positional relationship when connected.

  In order to make this formation state easy to understand, the connection part 11 of the present embodiment is formed by welding the conductors 9 of the respective insulated wire cores 5 in the VVF cables 2 to 4 (not limited to the present embodiment). To do). Further, the conductors 9 of each insulated wire core 6 are formed by welding. Further, the conductors 9 of each insulated wire core 7 are formed by welding.

  A predetermined electrical circuit is configured by forming the connection portion 11. Formation of the connection part 11 is completed by passing through the intermediate | middle peeling of the sheath 8 and the insulator 10, and welding of the conductors 9 in order. Welding is a connection method that is possible even if the range of peeling is narrow, and therefore the connecting portion 11 and the peripheral portion are formed small. In forming the connection portion 11, a crimp terminal or the like as in the conventional example is unnecessary.

  Here, the reference sign of the connection part 11 formed by welding the conductors 9 of the insulated wire cores 5 is replaced with 11a, and the reference sign of the connection part 11 formed by welding the conductors 9 of the insulated wire cores 6 is also used. If the reference numeral of the connection portion 11 formed by welding the conductors 9 of the respective insulated wire cores 7 is also replaced with 11c, a spatial distance portion SP1 is formed between the connection portions 11a and 11b. The In addition, a spatial distance portion SP2 is formed between the connection portions 11b and 11c.

  The spatial distance portions SP1 and SP2 are formed as spaces for providing a spatial distance between the adjacent connection portions 11a and 11b and the connection portions 11b and 11c. Of course, the formation of the spatial distance portions SP1 and SP2 ensures insulation. In other words, it is effective for obtaining an insulating effect. In this embodiment, the spatial distance portions SP1 and SP2 are about the distance between the conductors 9 of the insulated wire cores 5 to 7 (this is an example. If insulation can be ensured, it may be narrowed). Is formed in the space.

  The connection part 11 is covered and protected by the resin mold part 12 as shown in FIG. The resin mold portion 12 is formed by injection molding using a resin material having insulating properties (the molding method is an example). In the present embodiment, the resin mold portion 12 is formed in a rectangular shape (substantially rectangular parallelepiped shape) that straddles the peripheral portions on both sides of the connection portion 11 (the shape is an example). If it is possible to protect the above, it is not limited to the shape of this embodiment. Since the resin mold part 12 covers the connection part 11 and a peripheral part, it is formed small.

  Of course, by adopting injection molding, it becomes easy for molten resin to flow into the space (space distance portions SP1 and SP2) between the adjacent connection portions 11 (in the case of the conventional example, the inside of the joint box). Insulating thermosetting resin (epoxy resin or the like) is filled and molded into the space, but the thermosetting resin does not necessarily flow into the portion corresponding to the space due to, for example, air retention.

  Since the connecting portion 11 is not easily bent as described above, in other words, is in a state of being fixed in a positional relationship when connected, it does not move even when injection molding is performed. In addition, a sufficient spatial distance is maintained (spaces of the spatial distance portions SP1 and SP2 are maintained), and the molten resin flows into the space as described above to ensure insulation. As can be seen from the present embodiment, a special member for insulation is unnecessary.

  As described above with reference to FIGS. 1 to 3, the unit cable 1 has the connection portion 11, and this connection portion 11 is formed by welding predetermined conductors 9 to each other. There exists an effect that it can form as a smaller connection part 11. Thereby, size reduction of the unit cable 1 can be achieved, and there exists an effect that securing of the big space at the time of construction can be made unnecessary.

  In addition, since the unit cable 1 is small as described above, there is an effect that it can be handled more easily than before, and an effect that it can be installed even in a narrow space. Furthermore, since the conductors 9 are welded together to form the connection portion 11, there is also an effect that the processing time can be shortened as compared with the conventional case.

  In addition, the unit cable 1 has the resin mold part 12, and there is an effect that the connection part 11 can be protected by the resin mold part 12. Moreover, since it is the small connection part 11, the resin mold part 12 also has the effect that it can insulate and protect with the minimum amount of resin. Furthermore, since welding is employed and the resin molding portion 12 can be formed with a minimum amount of resin formed on the small connection portion 11, the manufacturing facility can be downsized. Also play.

  Therefore, according to the present invention, it is possible to provide the unit cable 1 that is excellent in workability and productivity as well as protecting the connection portion 11.

  Embodiment 2 will be described below with reference to the drawings. FIG. 4 is a perspective view of a connection portion and a peripheral portion of another example unit cable. FIG. 5 is an enlarged view of the connecting portion and the partition wall. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In FIG. 4, the unit cable 1 of the second embodiment is configured to further include a partition wall member 13 with respect to the first embodiment. The configuration and structure will be specifically described.

  The unit cable 1 is used for indoor wiring, and includes three VVF cables 2 to 4 (a flat vinyl-insulated vinyl sheath cable used for a power circuit of 600 V or less) and a partition member 13. The

  The VVF cables 2 to 4 include three insulated wire cores 5 to 7 and a sheath 8 that collectively covers these cables for each cable.

  The insulated wire cores 5 to 7 have a conductor 9 and an insulator 10 for each wire core. A single core wire having a circular cross section is used for the conductor 9. The insulator 10 is formed by extruding an insulating resin material on the outer surface of the conductor 9. The insulator 10 is formed in a circular cross section with a predetermined thickness. The sheath 8 is formed by extruding the outer surfaces of the three insulated wire cores 5 to 7 in parallel. The sheath 8 is formed in an oval cross section with a predetermined thickness.

  4 and 5, in the VVF cables 2 to 4 as described above, the middle of the sheath 8 and the insulator 10 is peeled for each cable, and the connection portion 11 is formed with respect to the exposed conductor 9. . The connecting portion 11 is formed by connecting predetermined conductors 9 by welding. Since the predetermined conductor 9 is connected by welding, the connection part 11 will be in the state which does not bend easily. Therefore, it is fixed in the positional relationship when connected.

  The partition member 13 is, for example, a resin molded product having an insulating property, and includes a base portion 14 and a plurality of partition walls 15 rising from the base portion 14. The partition 15 is formed as a partition part inserted between the adjacent connection parts 11 (space distance parts SP1 and SP2). The connection parts 11 are separated (separated) by the partition 15 and insulated. In this embodiment, the partition wall 15 is formed to have a thickness that does not drop out from between the connection portions 11 (space distance portions SP1 and SP2).

  The partition wall member 13 may be a resin molded product that insulates the entire exposed portion of the conductor 9. In this case, the formation of the resin mold portion 12 is arbitrary.

  The connection part 11 is covered and protected by the resin mold part 12. The resin mold part 12 is formed by injection molding using an insulating resin material. Since the resin mold part 12 covers the connection part 11 and a peripheral part, it is formed small.

  As described above with reference to FIGS. 4 and 5, in the above configuration and structure, the unit cable 1 is further provided with the partition wall member 13, so that in addition to the effects of the first embodiment, the connection is performed. There is also an effect that the insulation between the portions 11 can be ensured.

  In addition, the present invention can of course be modified in various ways within the scope not changing the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Unit cable 2-4 ... VVF cable 5-7 ... Insulation wire core 8 ... Sheath 9 ... Conductor 10 ... Insulator 11 ... Connection part 12 ... Resin mold part 13 ... Partition member 14 ... Base part 15 ... Partition SP1, SP2 ... Space distance part

Claims (4)

In a unit cable in which predetermined conductors in a plurality of VVF cables are electrically connected to each other and the connection portion is a connection portion,
A unit cable characterized in that a space distance portion is formed between adjacent connection portions to provide a spatial distance, and the connection portion itself is formed by welding the conductors. The unit cable according to claim 1,
The unit cable is characterized in that the connection part is covered with a resin mold part formed by molding an insulating resin. The unit cable according to claim 1 or 2,
Adjacent connection portions are partitioned by an insulating partition disposed in the space distance portion. Forming a wire connection portion by electrically connecting predetermined conductors in a plurality of VVF cables;
A step of covering the connection part by molding an insulating resin and forming a resin mold part on the outside of the connection part;
A method for producing a unit cable, comprising:

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