JP2019121576A - Cable with resin molded body - Google Patents

Abstract

To achieve a low cost of a cable with a resin molded body.SOLUTION: A cable with a resin molded body has a cable 1, a sensor 30 connected to a cable edge, and a resin molded body 8 covering the cable edge and the sensor 30. The resin molded body 8 is formed from a holder member 10 formed by a first resin material and on which the cable edge and the sensor 30 are mounted, and a cover member 20 formed by a second resin material having higher melting point than that of the first resin material and covering the cable edge and the sensor 30. The cover member 20 covers a part of the holder member 10 in addition to the cable edge and the sensor 30, and a boundary surface between the holder member 10 and the cover member 20 are deposited by heat when the cover member 20 is molded.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a cable provided with a resin molding at its end.

  Today, various cables such as power cables and communication cables are used in various fields. In one such cable, a core wire, a sheath provided around the core wire, an electronic component connected to the tip of the core wire protruding from the end of the sheath, and these sheath ends, There is a cable with a resin molded body having a holder in which an exposed portion of a core wire and an electronic component connected to the core wire are accommodated, and a resin outer that covers the entire circumference (entire) of the holder. This type of cable is used, for example, as an on-vehicle sensor such as an ABS sensor, a torque sensor, or an index sensor. In the following description, the sheath end, the exposed portion of the core wire and the electronic component may be collectively referred to as "cable end". That is, the element accommodated in the holder may be generically referred to as "cable end".

  The cable with resin molded body as described above accommodates the cable end in a resin holder, sets the holder containing the cable end in the mold, and the resin material is placed in the mold in which the holder is set. Is manufactured by feeding and molding the outer. Also, the holder is formed of a lower holder member and an upper holder member which are abutted against each other. When the cable end is accommodated in the holder, the cable end is placed on the lower holder member, and the upper holder member is superimposed on the lower holder member on which the cable end is placed. That is, in order to accommodate the cable end in the holder, it is necessary to sandwich the cable end between the lower holder member and the upper holder member.

JP, 2016-4688, A

  In order to manufacture the cable with a resin molded body, it is necessary to sandwich the cable end between the lower holder member and the upper holder member and store it in the holder before molding the outer, and the number of manufacturing steps There were many. In addition, since the holder is formed of two half members, the number of parts is large. Furthermore, many resin materials were required to form an outer covering the entire circumference (entire) of the holder. Generally, conventional cables with resin molded bodies are expensive to manufacture.

  An object of the present invention is to reduce the manufacturing cost of a resin molded cable.

  The cable with a resin molded body of the present invention has a cable, an electronic component connected to the end of the cable, and a resin molded body for covering the cable end and the electronic component. The resin molded body is molded of a first resin material and molded of a holder member on which the cable end portion and the electronic component are placed, and a second resin material having a melting point higher than that of the first resin material. And a cover member covering the cable end and the electronic component. The cover member covers a portion of the holder member in addition to the cable end portion and the electronic component, and the cover member is formed at an interface between the holder member and the cover member. It is welded by the heat of the occasion.

  ADVANTAGE OF THE INVENTION According to this invention, cost reduction of the cable with a resin molding is implement | achieved.

It is a figure which shows the structure of a cable. It is a figure which shows the external appearance of a resin molding. It is a figure which shows the structure of a holder member. It is another figure which shows the structure of a holder member. It is a figure which shows the inside of the resin molding.

  Next, an example of the embodiment of the cable with a resin molded body of the present invention will be described in detail with reference to the drawings. The cable with a resin molded body according to the present embodiment has a cable, an electronic component (a sensor in the present embodiment) connected to the cable end, and a resin molded product covering the cable end and the electronic component.

  As shown in FIG. 1, the cable 1 has a pair of insulated wires 3 and 4 and a sheath 5 for covering the insulated wires 3 and 4 collectively. In other words, the cable 1 is a two-core cable having the pair of insulated wires 3 and 4 as a core.

  Each of the insulated wires 3 and 4 has a conductor 6 and an insulating layer 7 provided around the conductor 6. The conductor 6 is a stranded wire in which a plurality of strands are collectively twisted, and the insulating layer 7 is formed of urethane. Although the kind of wire which forms the conductor 6 is not specifically limited, For example, a soft copper wire, a hard copper wire, a tin plating soft copper wire, a tin plating hard copper wire etc. can be used. The stranding method of the strands is not limited to collective stranding, and may be, for example, concentric stranding or composite stranding. The insulating layer 7 may be formed of a resin material other than urethane.

  The sheath 5 is made of urethane and collectively covers the insulated wires 3 and 4 arranged in parallel to each other. The sheath 5 holds the distance between the pair of insulated wires 3 and 4. However, the sheath 5 may be formed of a resin material other than urethane.

  As shown in FIG. 1, the insulated wires 3 and 4 are exposed at at least one end of the cable 1. Specifically, the insulated wires 3 and 4 respectively project from at least one end 5 a of the sheath 5. More specifically, the insulated wires 3 and 4 respectively project from at least one end face 5 b of the sheath 5.

  As shown in FIG. 2, the resin molded body 8 is formed of a holder member 10 molded of a first resin material and a second resin material different from the first resin material, and the holder member 10 is partially formed. And a cover member 20 for covering. The first resin material and the second resin material are resin materials having different melting points, and the melting point of the second resin material is higher than the melting point of the first resin material (melting point of the first resin material Is lower than the melting point of the second resin material). That is, the resin molded body 8 is formed by the holder member 10 molded by the first resin material having a relatively low melting point, and the cover member 20 molded by the second resin material having a relatively high melting point. It is done. The first resin material in the present embodiment is polyamide (PA), and the second resin material is polyphthalamide (PPA). The melting point of polyphthalamide (PPA) is about 320 ° C.

  As shown in FIGS. 3 and 4, the holder member 10 has an overall semi-cylindrical appearance, and the end of the cable 1 and the sensor 30 are placed on the holder member 10. In the holder member 10, the sheath accommodating portion 11 in which the sheath end 5a is accommodated, the stage 12 in which the root portions 3a and 4a of the insulated wires 3 and 4 are placed, and the conductors 6 of the insulated wires 3 and 4 are accommodated. The conductor accommodating part 13a, 13b to be carried out, and the electronic component accommodating part 14 in which the sensor 30 is accommodated are formed. The sheath accommodating portion 11, the stage 12, the conductor accommodating portions 13 a and 13 b and the electronic component accommodating portion 14 are arranged in this order along the longitudinal direction of the holder member 10.

  The sheath accommodating portion 11 has a semicircular cross-sectional shape capable of accommodating approximately a radial half (lower half) of the sheath end 5a. On the other hand, each of the conductor accommodating portions 13a and 13b is a groove of a rectangular cross section capable of accommodating substantially all of the respective conductors 6 in the radial direction. Further, the two conductor accommodating portions 13 a and 13 b extend in parallel to each other along the longitudinal direction of the holder member 10. Between the two conductor accommodating portions 13a and 13b, convex portions 15 are formed which prevent the conductors 6 individually accommodated in the respective conductor accommodating portions 13a and 13b from contacting with each other. The convex portion 15 has the same or substantially the same length as the conductor accommodation portions 13a and 13b, and extends in parallel with the conductor accommodation portions 13a and 13b.

  The stage 12 is a flat surface provided between the sheath accommodating portion 11 and the conductor accommodating portions 13a and 13b, and on the stage 12, the roots of the insulated wires 3 and 4 projecting from the sheath end 5a. The parts 3a, 4a are placed. Specifically, all or part of the exposed portions of insulated wires 3 and 4 protruding from sheath end 5a covered by insulating layer 7 (FIG. 1) is placed on stage 12 ing. That is, of the exposed portions of the insulated wires 3 and 4, the covered portion covered by the insulating layer 7 (FIG. 1) is placed on the stage 12. Moreover, the conductor part which is not covered by the insulating layer 7 (FIG. 1) among the exposed parts of the insulated wires 3 and 4 is accommodated in conductor accommodating part 13a, 13b. And the tip of conductor 6 of each insulated wire 3 and 4 is connected to sensor 30 stored in electronic parts storage part 14 provided ahead of conductor storage parts 13a and 13b. In addition, the sensor 30 in this embodiment is a magnetic sensor which outputs the signal according to the surrounding magnetic field change. Further, at substantially the center in the longitudinal direction of the holder member 10, a protrusion 16 extending in a direction orthogonal to the same direction is integrally formed.

  As shown in FIGS. 2 and 5, the cover member 20 covers a portion of the holder member 10 in addition to the end of the cable 1 and the sensor 30. Specifically, the cover member 20 covers the sheath end 5a, the exposed portions (covered portion and conductor portion) of the insulated wires 3 and 4, and the sensor 30. Further, the cover member 20 covers the upper surface 17, the rear end surface 18 and the tip end surface 19 of the holder member 10. In other words, the outer peripheral surface of the holder member 10 is not substantially covered by the cover member 20 and is exposed. The stage 12 is a part of the upper surface 17 of the holder member 10.

  However, the entire circumference (the whole) of the protruding portion 16 of the holder member 10 is covered by the cover member 20. Then, a flange portion 41 provided with the through hole 40 is formed by a part of the cover member 20 which covers the projecting portion 16 of the holder member 10. That is, the protrusion 16 of the holder member 10 has a role as a core of the flange 41. When fixing the resin molded body 8 (sensor 30) at a desired mounting position, a bolt inserted through the through hole 40 provided in the flange portion 41 is screwed into a bolt hole provided in advance at the mounting position.

  The cover member 20 sets the holder 10 (FIG. 4) on which the end of the cable 1 and the sensor 30 are placed in the mold, and heats and melts the inside of the mold in which the holder 10 is set. Resin material (polyphthalamide (PPA)). As described above, the holder member 10 is formed of the first resin material (polyamide (PA)) having a melting point lower than that of the second resin material (polyphthalamide (PPA)). . Further, as described above, the sheath 5 is formed of urethane having a melting point lower than that of the second resin material (polyphthalamide (PPA)). Therefore, when the heat-melted second resin material is supplied into the mold in which the holder member 10 is set, the surface layer portions of the holder member 10 and the sheath end 5a in contact with the supplied second resin material Dissolve. As a result, the interface between the holder member 10 and the cover member 20 and the interface between the sheath end 5a and the cover member 20 are welded, and airtightness and waterproofness are secured. That is, the interface between the holder member 10 and the sheath end 5a and the cover member 20 is welded by heat when the cover member 20 is molded, and airtightness and waterproofness are secured.

  The resin molded body 8 included in the resin molded body-attached cable according to the present embodiment is formed of a holder member 10 and a cover member 20 partially covering the holder member 10. Therefore, the number of parts is smaller than that of a conventional cable with a resin molded body having a resin molded body formed of a holder formed of two half members and an outer covering the entire circumference (entire) of the holder. Few. Moreover, the resin molded body 8 in this embodiment is formed by shape | molding the cover member 20 directly on the holder member 10 in which the cable edge part etc. were mounted. Therefore, the cable with a resin molded body according to the present embodiment can be manufactured with a smaller number of processes than the conventional cable with a resin molded body, which needs to accommodate the cable end and the like in the holder prior to the outer molding. . Furthermore, the cover member 20 forming the resin molded body 8 in the present embodiment covers only a part of the holder member 10. That is, the cover member 20 can be molded with a smaller amount of resin material than the resin material required to mold the conventional outer covering the entire circumference (entire) of the holder. As described above, the cable with a resin molded body according to the present embodiment can be manufactured with fewer parts, less materials, and fewer processes, as compared with a conventional cable with a resin molded body.

  The present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the invention. For example, the cable 1 is not limited to a two-core cable, and may be a single-core cable or a cable with three or more cores. The first resin material may be a resin material having a melting point lower than that of the second resin material, and is not limited to polyamide (PA). The second resin material may be a resin material having a melting point higher than that of the first resin material, and is not limited to polyphthalamide (PPA). For example, polyphenylene sulfide (PPS (polyphenylene sulfide)) can be selected as the second resin material.

  The sheath 5 of the cable 1 and the insulating layer 7 of the insulated wires 3 and 4 can also be formed of an insulating resin other than urethane, for example, polybutylene terephthalate (PBT). Moreover, the sensor 30 is replaced with another electronic component according to the application of the resin molded body-attached cable.

1 cable 3, 4 insulated wire 3a, 4a root portion 5 sheath 5a end of sheath (sheath end)
5b End face 6 Conductor 7 Insulating layer 8 Resin molded body 10 Holder member 11 Sheath housing portion 12 Stage 13a, 13b Conductor housing portion 14 Electronic component housing portion 15 Convex part 16 Protrusion part 17 Upper surface 18 Rear end surface 19 Tip surface 20 Cover member 30 Sensor 40 through hole 41 flange portion

Claims (6)

Cable,
Electronic components connected to the cable end,
And a resin molded body for covering the cable end and the electronic component,
The resin molded body is
A holder member formed of a first resin material and on which the cable end and the electronic component are mounted;
A second resin material having a melting point higher than that of the first resin material, and formed of a cover member covering the cable end and the electronic component;
The cover member covers a part of the holder member in addition to the cable end and the electronic component,
The interface between the holder member and the cover member is welded by heat when the cover member is formed,
Cable with resin molded body. In the cable with a resin molded body according to claim 1,
The cable includes an insulated wire and a sheath provided around the insulated wire.
The holder member includes a sheath accommodating portion in which an end portion of the cable is accommodated, a stage on which a covered portion of the insulated wire protruding from the end portion of the sheath is placed, and the insulation protruding from the covered portion A conductor accommodating portion in which a conductor portion of a wire is accommodated, and an electronic component accommodating portion in which the electronic component is accommodated;
Cable with resin molded body. In the cable with a resin molded body according to claim 2,
The cable is a two-core cable having a pair of the insulated wires,
The holder member has two of the conductor receiving portions for receiving the conductor portions of the respective insulated wires.
Cable with resin molded body. The cable with a resin molded body according to any one of claims 1 to 3
The first resin material is a polyamide, and the second resin material is a polyphthalamide.
Cable with resin molded body. In the cable with a resin molded body according to any one of claims 1 to 4,
The resin molded product-attached cable wherein the electronic component is a sensor. In the cable with a resin molded body according to claim 5,
A cable with a resin molded body, wherein the sensor is a magnetic sensor that outputs a signal according to a change in a magnetic field in the surrounding.

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