JP2016062863A - Electrical cable and method for production thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the production stability when winding a tape member and workability when removing a sheath in an electrical cable comprising winding the tape member around a core electric wire and laying on the sheath around the tape member.SOLUTION: An electrical cable 10 comprises: a core electric wire 1 formed by twisting plural core materials 4 including conductors 5 and an insulation layer formed around the conductors 5; a tape member 2 wound around the core electric wire 1; a first covering layer 7 formed around the tape member; and a second covering layer 8 formed around the first covering layer. The tape member 2 is wound around the core electric wire 1 spirally while partially overlapping. The thickness of the tape member 2 is in the range of 0.025 to 0.035 mm, and the width of the tape member 2 is in the range of 15 to 25 mm. Besides, the overlapping area of the tape member 2 generating by spiral winding is in the range from 1/8 to 1/3 of the width of the tape member.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cable and a method for manufacturing the cable, and more specifically to a cable in which a tape member is wound around a core electric wire made of a conductor and an insulating layer covering the conductor, and a sheath is provided around the tape member.

  With regard to a tape member winding technique using a tape winding device, for example, a method for manufacturing a tape-wrapped insulated wire described in Patent Document 1 has two tape pads attached to a fryer that rotates around a wire and simultaneously feeds the tape from these. . The two tapes that have been fed out are wound on the wire from 180 ° opposite positions via corresponding guide rolls and angle pins. As a result, two tapes are alternately wound on the wire while being alternately wrapped, so that a lap winding structure equivalent to a single winding in which the wrap marks of both tapes are in one direction can be obtained.

JP-A-7-320571

  When winding the tape member around the core wire with the tape wrapping device, if the manufacturing conditions for wrapping the tape member and the specifications such as the thickness and width of the tape member are not appropriate, the tape member will break before the tape member is wound around the core wire. Problem occurs. On the other hand, if the winding of the tape member is too loose, the nipple before the die is contacted and cut in the next sheath covering step. Alternatively, when the width of the tape member is too narrow, there is a problem that the tape members are not sufficiently overlapped and a gap is opened in the wound tape member. That is, the manufacturing conditions for winding the tape member and the tape specifications such as the tape width and thickness need to be appropriate from the viewpoint of manufacturing stability.

  In a cable in which a sheath is coated on a tape member, the winding conditions of the tape member and the specifications such as the thickness and width of the tape member affect the workability when removing the sheath of the manufactured cable. In the cable of this configuration, the tape member is wound between the core electric wire and the sheath. However, when the core electric wire is exposed at the time of connection to a connector or a substrate, the tape member must be easily removed. If so, the workability is hindered. For example, if the tape member is too thick, the tape width is too wide, or the overlap of the tape members is too large, it becomes difficult to remove the tape member. Moreover, when the tension | tensile_strength at the time of winding of a tape member is too large, removal of a tape member will become difficult. Patent Document 1 discloses an apparatus for winding a tape on a wire, but no consideration is given to manufacturing stability and workability at the time of sheath removal as described above.

  The present invention has been made in view of the above circumstances, and in a cable in which a tape member is wound around a core electric wire and a sheath is provided around the core member, the manufacturing stability and the product cable at the time of winding the tape member are improved. It is an object of the present invention to provide a cable with improved workability at the time of sheath removal and a method for manufacturing the cable.

  The cable according to the present invention includes a core electric wire formed by twisting a plurality of core materials including a conductor and an insulating layer formed around the conductor, and a tape member wound around the core electric wire, A covering layer formed around the tape member, wherein the tape member is spirally wound while overlapping a part of the core electric wire, and the thickness of the tape member is The range of 0.025 to 0.035 mm, the width of the tape member is in the range of 15 to 25 mm, and the region where the tape member overlaps by being spirally wound is one of the widths of the tape member. It is a cable in the range of / 8 to 1/3.

  The cable manufacturing method according to the present invention includes a step of twisting a plurality of core materials including a conductor and an insulating layer formed around the conductor to form a core wire, and a tape member around the core wire. A cable manufacturing method comprising: a step of winding; and a step of forming a coating layer around the tape member, wherein the step of winding the tape member overlaps a part of the tape member with respect to the core electric wire. The tape member has a thickness of 0.025 to 0.035 mm and a width of the tape member of 15 to 25 mm, and the tape member is wound in a spiral manner. In this cable manufacturing method, the overlapping region is set to a range of 1/8 to 1/3 of the width of the tape member.

  According to the present invention, in a cable in which a tape member is wound around a core electric wire and a sheath is provided around the core member, the manufacturing stability when winding the tape member and the workability when removing the sheath of the product cable are improved. And a method of manufacturing the cable.

It is sectional drawing which shows the structural example of the cable by this invention. It is a figure for demonstrating the method to manufacture the cable of embodiment which concerns on this invention. It is a figure which shows the setting range of the thickness of the tape member which comprises the cable which concerns on this invention, and the setting range of the tension | tensile_strength of the tape member at the time of cable manufacture. It is a figure for demonstrating the method to confirm the optimal thickness regarding the removal ease of a tape member.

First, embodiments of the present invention will be listed and described.
(1) The cable of the present application is a core wire formed by twisting a core material including a conductor and an insulating layer formed around the conductor, and a tape member wound around the core wire. And a covering layer formed around the tape member, wherein the tape member is spirally wound with a part thereof being overlapped with the core electric wire, and the thickness of the tape member The width of the tape member is in the range of 0.025 to 0.035 mm, the width of the tape member is in the range of 15 to 25 mm, and the region where the tape member overlaps by being spirally wound is the width of the tape member. It is a cable in the range of 1/8 to 1/3. As a result, in a cable in which a tape member is wound around a core electric wire and a sheath is provided around the core member, a cable with improved manufacturing stability when the tape member is wound and workability when removing the sheath of the product cable is provided. be able to.

  (2) The cable includes a first covering layer formed around the tape layer and a second covering layer formed around the first covering layer. Thereby, a composite function can be provided to the coating layer by using two coating layers each having a characteristic function.

  (3) The cable manufacturing method of the present application includes a step of twisting a plurality of core materials including a conductor and an insulating layer formed around the conductor to form a core wire, and a tape around the core wire. A cable manufacturing method comprising: a step of winding a member; and a step of forming a coating layer around the tape member, wherein the step of winding the tape member is a part of the tape member with respect to the core electric wire. The tape member has a thickness of 0.025 to 0.035 mm, a width of the tape member of 15 to 25 mm, and the tape member is wound in a spiral manner. In this cable manufacturing method, a region where the members overlap is set to a range of 1/8 to 1/3 of the width of the tape member. As a result, in a cable in which a tape member is wound around the core electric wire and a sheath is provided around the core member, the manufacturing stability of the tape member is improved when the tape member is wound and the workability when the sheath of the product cable is removed is improved. Can be provided.

  (4) In the step of winding the tape member, it is preferable that the tape member is wound around the core electric wire with the tension of the tape member in a range of 2 to 6N. This provides more specific conditions for improving manufacturing stability when winding the tape member and workability when removing the sheath of the product cable.

  (5) It has the process of forming a 1st coating layer around the said tape member, and the process of forming a 2nd coating layer around the said 1st coating layer. Thereby, a composite function can be provided to the coating layer by using two coating layers each having a characteristic function.

[Details of the embodiment of the present invention]
Specific examples of the tape tension control method and the tape winding material manufacturing method according to the present invention will be described below with reference to the drawings. In addition, this invention is not limited to these illustrations, is shown by the claim, and includes all the changes within the meaning and range equivalent to a claim.

FIG. 1 is a cross-sectional view showing a configuration example of a cable according to the present invention. The cable according to the embodiment of the present invention is used for an anti-lock brake system (ABS) sensor cable and an electric parking brake (Electric Parking Brake) mounted on a vehicle as an example, and a current is supplied to a motor that drives a brake caliper. Can be used for cable to send.
The cable 10 includes a core electric wire 1, a tape member 2 wound around the core electric wire 1, and a sheath 3 covering an outer periphery of the tape member 2 wound around the core electric wire 1. The outer diameter of the cable 10 of this example is, for example, 6 to 12 mm, and preferably 8.3 to 10.3 mm, but is not limited to these outer diameters.

  The core electric wire 1 is formed by twisting together a plurality of core materials 4. Each of the core members 4 includes a conductor 5 and an insulating layer 6 that covers the outer periphery of the conductor 5. Although the core material 4 of this example uses two core materials 4 having substantially the same diameter, in the embodiment according to the present invention, the core electric wire 1 is configured using a plurality of core materials 4 having different diameters. can do.

The conductor 5 is a copper alloy wire made of a copper alloy, for example, and is a stranded wire formed by twisting a plurality of strands having an outer diameter of 0.08 m, for example. The number of the some strand which comprises the conductor 5 can be about 360-610, for example. The cross-sectional area of the conductor 5 (total cross-sectional area of a plurality of strands) is, for example, 1.5 to 3.0 mm ^2, and preferably 2.0 to 2.6 mm ^2. It is not limited to. For example, the conductor cross-sectional area may be in the range of 0.18 to 0.40 mm ² . In addition, as a material which comprises the conductor 5, it is not restricted to a copper alloy wire, The material which has electroconductivity and a softness | flexibility like an annealed copper wire is applicable.

  The insulating layer 6 is formed of a flame retardant polyolefin-based resin. For example, cross-linked polyethylene imparted with flame retardancy by blending a flame retardant is used. The thickness of the insulating layer 6 is, for example, 0.2 to 0.8 mm, and preferably 0.3 to 0.7 mm, but is not limited to this example. The outer diameter of the insulating layer 6 is, for example, 2.5 to 4.0 mm, and preferably 2.8 to 3.8 mm, but is not limited to this example. For example, the outer diameter of the insulating layer may be 1.2 to 1.6 mm. The material constituting the insulating layer 6 is not limited to a flame retardant polyolefin resin, and other materials such as a fluororesin may be used.

The tape member 2 is spirally wound around the outer periphery of the core electric wire 1 and is disposed between the core electric wire 1 and an inner sheath 7 described later. As the tape member 2, a fiber tape, for example, a paper tape or an artificial fiber tape made of a resin material such as polyester can be used. Further, the tape member 2 is wound around the core electric wire 1 by spiral wrapping.
Further, when the spiral winding is performed, the winding direction of the tape material 2 can be opposite to the twisting direction of the core material 4, and thus the surface of the wound tape member 2 is not easily uneven, and the outer diameter is reduced. It can be stabilized.

The sheath 3 is composed of one layer or a plurality of layers. For example, it has a double structure comprising an inner sheath (first covering layer) 7 and an outer sheath (second covering layer) 8 and is formed so as to cover the core electric wire 1 in a state where the tape member 2 is wound. Say. Let the core electric wire 1 in which the tape member 2 was wound be the core electric wire 100 with a tape.
The inner sheath 7 is formed by extrusion coating on the outer periphery thereof so as to cover the cored wire 100 with tape. As a material constituting the inner sheath 7, for example, a polyolefin resin such as polyethylene or vinyl acetate copolymer (EVA), a polyurethane elastomer, a polyester elastomer, or a compound formed by mixing at least two of them is used. For example, cross-linked polyethylene can be used. The use of a material having excellent flexibility is preferable because the cable 10 is flexible. The thickness of the inner sheath 7 is, for example, 0.3 to 0.9 mm, and preferably 0.45 to 0.80 mm, but is not limited to this example. The outer diameter of the inner sheath 7 is, for example, 6.0 to 10.0 mm, and preferably 7.3 to 9.3 mm, but is not limited to this example. For example, the outer diameter of the inner sheath may be 2.8 to 5.0 mm.

  The outer sheath 8 is formed by extrusion coating on the outer periphery so as to cover the outer periphery of the inner sheath 7. As the material of the outer sheath 8, a material having flame resistance and excellent wear resistance is preferable. For example, a flame retardant polyurethane resin can be used. The thickness of the outer sheath 8 is, for example, in the range of 0.3 to 0.7 mm, but is not limited to this example. The outer diameter of the outer sheath 8 is, for example, 6 to 12 mm, and preferably 8.3 to 10.3 mm, but is not limited to this example. For example, the outer diameter of the outer sheath may be 3.5 to 5.5 mm.

  FIG. 2 is a diagram for explaining a method of manufacturing the cable according to the embodiment of the present invention, and shows a schematic configuration of a manufacturing apparatus for manufacturing the cable 10. As shown in FIG. 2, the cable manufacturing apparatus 11 includes two core electric wire supply reels 12, a twisting portion 13, a tape member supply reel 14, a tape member winding portion 15, an inner sheath covering portion 16, and an outer sheath covering portion 17. A cooling unit 18 and a cable winding reel 19. In this example, an example in which the core electric wire 1 is formed using two core materials is shown.

  The core material 4 is wound around each of the two core electric wire supply reels 12, and the two core materials 4 are supplied to the twisting unit 13. In the twisting unit 13, the two first core materials 4 to be supplied are twisted together to form the core wire 1. The formed core electric wire 1 is sent to the winding part 15 around the tape member.

  In the tape member winding portion 15, the core electric wire 1 sent from the twisting portion 13 and the tape member 2 supplied from the tape member supply reel 14 merge, and the tape member 2 is spirally formed on the outer periphery of the core electric wire 1. The cored wire 100 with a tape is formed by being wound by lap winding. Here, the tape member 2 is continuously wound around the traveling core wire 1 using a tape winding device. In the tape winding device, for example, the tape member 2 is supplied to a fryer that rotates around the core electric wire 1 that travels, and the tape member is continuously wound around the core electric wire 1 according to the rotation of the fryer. . The tape-attached core electric wire 100 in which the tape member 2 is wound around the core electric wire 1 is sent to the inner sheath covering portion 16.

  A resin material such as polyethylene is supplied to the inner sheath covering portion 16 from the storage portion 16a. The inner sheath covering portion 16 melts and kneads the supplied resin material with an extruder and extrudes it from the die, and coats the outer periphery of the tape-attached core electric wire 100 inserted through the die with the resin material. Thereby, the inner sheath 7 is formed around the cored wire 100 with tape. The tape-attached core electric wire 100 covered with the inner sheath 7 is sent to the outer sheath covering portion 17.

  A resin material such as flame retardant polyurethane is supplied to the outer sheath covering portion 17 from the storage portion 17a. The outer sheath coating portion 17 melts and kneads the supplied resin material with an extruder and extrudes it from a die, and coats the outer periphery of the taped core electric wire 100 covered with the inner sheath. In this way, the outer sheath 8 is formed so as to cover the periphery of the inner sheath 7, and the double-structured sheath 3 composed of the inner sheath 7 and the outer sheath 8 is formed as a cover. The tape-attached core electric wire 100 in which the sheath 3 is formed is sent to the cooling unit 18, and the sheath 3 is cooled and solidified to form a cable 10, which is wound around the cable winding reel 19. When cross-linking is performed thereafter, the sheath is cross-linked by irradiating the cable with an electron beam or γ-ray.

FIG. 3 is a diagram showing the setting range of the thickness and width of the tape member constituting the cable according to the present invention, and the tension setting range of the tape member at the time of manufacturing the cable.
In the cable manufacturing process having the above-described configuration, manufacturing stability when the tape member is wound and workability when removing the sheath are required. In order to satisfy these required characteristics, in the embodiment according to the present invention, the thickness of the tape member 2 wound spirally while being partially overlapped with the core electric wire 1 is 0.025 to 0.035 mm. The width of the tape member 2 is set to a range of 15 to 25 mm, and a region where the tape member 2 overlaps when wound in a spiral shape is set to a range of 1/8 to 1/3 of the width of the tape member 2. Moreover, when winding the tape member 2 around the core electric wire 1, the tension | tensile_strength of the tape member 2 shall be the range of 2-6N. Thereby, the manufacturing stability at the time of winding of the tape member 2 and the workability | operativity at the time of sheath removal can be satisfied.

  To explain in more detail, regarding the production stability, when the tape member 2 is wound around the core electric wire 1 with the tape winding device, the manufacturing conditions for winding the tape member 2 and the specifications such as the thickness and width of the tape member are not appropriate. Before the tape member 2 is wound around the core electric wire 1, the tape member 2 is cut. Here, when the thickness of the tape member 2 was 0.020 mm, a phenomenon that the tape member 2 was cut during winding occurred. On the other hand, when the thickness of the tape member 2 was 0.025 mm, the tape member 2 was not cut and the production could be continued. The tension at this time was 2N. Therefore, from the viewpoint of manufacturing stability, the thickness of the tape member 2 needs to be 0.025 mm or more.

  Next, regarding the tape width of the tape member 2, if the tape width is too narrow, the tape member 2 is cut before the tape member 2 is wound around the core electric wire 1. On the other hand, if the width of the tape member 2 is too narrow, the productivity of the cable deteriorates in the process of winding the tape member 2 in a spiral shape. Here, by setting the width of the tape member 2 to 15 mm or more, it was possible to prevent the tape member 2 from being cut and to maintain predetermined productivity.

Next, regarding the tension when the tape member is wound around the core electric wire 1, if the tension of the tape member 2 is excessively small, the tape member 2 is loosely wound around the core electric wire 1, and in the next sheath covering step, the nipple before the die is formed. The tape member 2 is cut due to contact and catching.
Here, when the tape member 2 was wound around the core electric wire 1 with a tension of 1.5 N, the tape member 2 was loosely wound, and the nipple was caught and the tape member 2 was cut. Moreover, by winding the tape member 2 around the core electric wire 1 with a tension of 2N, it was possible to manufacture stably without causing trouble in the next process. Therefore, from the viewpoint of manufacturing stability, the tension on the tape member 2 needs to be 2N or more.

Next, workability at the time of sheath removal will be described. As described above, the cable 10 requires workability that allows the tape member 2 to be easily removed when the sheath member is removed and the core electric wire 1 is exposed at the time of connection to a connector or a substrate.
First, regarding the thickness of the tape member 2, if the thickness of the tape member 2 is excessive, when the core electric wire 1 of the cable 10 is exposed, the tape member 2 cannot be easily cut and workability is hindered. The

Here, the optimum thickness related to the ease of removal of the tape member 2 was confirmed by the method shown in FIG. In the example of FIG. 4, the blade 20 is inserted into the cable 10 from both sides to make a cut. The blade 20 is inserted from the outer sheath 8 to the inner sheath 7 and cuts to a depth just before reaching the tape member 2. And the sheath 3 of the part of the cut | interruption which inserted the blade 20 is grasped by hand, and a sheath and a tape member are cut together, and the core electric wire 1 is exposed. At this time, when the tape member 2 is cut and the core electric wire 1 is exposed, it is considered good.
Here, when the thickness of the tape member 2 was 0.035 mm, the tape member 2 was cut integrally with the sheath, and the core electric wire 1 could be exposed. Moreover, when the thickness of the tape member 2 was 0.05 mm, the tape member 2 could not be peeled off integrally with the sheath and remained on the core electric wire 1. Therefore, for workability at the time of removing the sheath, the thickness of the tape member 2 needs to be 0.035 mm or less.

  Next, regarding the width of the tape member 2, if the width of the tape member 2 is excessive, the tape member 2 is easily cut integrally with the sheath when the sheath 3 of the cable 10 is removed to expose the core electric wire 1. Cannot be removed. Here, when the width of the tape member 2 is 25 mm, the tape member 2 is cut and the core electric wire 1 can be exposed. However, when the width of the tape member 2 is 30 mm, the tape member 2 can be easily cut. The core electric wire 1 could not be exposed. Therefore, for workability at the time of removing the sheath, the width of the tape member 2 needs to be 25 mm or less.

  Next, regarding the tension when the tape member 2 is wound around the core electric wire 1, if the tension of the tape member 2 is excessive, the tape member 2 is tightly wound around the core electric wire 1, and the sheath 2 is removed to remove the core electric wire 1. When exposed, the tape member 2 remains on the core wire 1 and cannot be removed. Here, when the tape member 2 was wound around the core electric wire 1 with a tension of 6.5 N, the tape member 2 could not be removed when the sheath was removed. On the other hand, when the tape member 2 is wound around the core electric wire 1 with a tension of 6N, the core electric wire 1 can be exposed by removing the tape member 2 integrally with the sheath when the sheath is removed. Therefore, from the viewpoint of workability when removing the sheath, the tension on the tape member 2 needs to be 6N or less.

Next, regarding the overlapping width of the tape member 2, if the overlapping width, which is the overlapping region of the tape member 2 wound in a spiral shape, is excessive, the tape member 2 is exposed when the sheath 3 is removed and the core electric wire 1 is exposed. Cannot be cut easily, and the core wire 1 cannot be exposed. Here, when the tape member 2 is wound in a spiral manner at a pitch of 22 mm, when the overlap width is 1/3 of the width of the tape member 2, the tape member 2 is cut and the core electric wire 1 can be exposed. However, when the overlap width is 1/2 of the width of the tape member 2, the tape member 2 cannot be easily cut and the core electric wire 1 cannot be exposed.
Further, when the overlap width is smaller than 1/8 of the width of the tape member 2, the tape member 2 may be opened due to fluctuations in winding during the winding production of the tape member 2, and the core electric wire 1 may be exposed. There is not preferable. Accordingly, the overlapping width of the tape member 2 needs to be in the range of 1/8 to 1/3 of the width of the tape member 2.

  From the evaluation results of the above items of manufacturing stability and workability at the time of sheath removal, it is appropriate that the thickness, width, overlap width, and tension at the time of manufacturing the tape member 2 are within the ranges shown in FIG. It becomes. That is, the thickness of the tape member 2 is in the range of 0.025 to 0.035 mm, the width of the tape member 2 is in the range of 15 to 25 mm, and the region where the tape member 2 overlaps by being spirally wound is the tape member. It is preferable that the width is in the range of 1/8 to 1/3 of the width of 2. Moreover, it is more preferable that the tension of the tape member 2 when the tape member 2 is wound around the core electric wire is in a range of 2 to 6N. Thereby, in a cable in which a tape member is wound around the core electric wire and a sheath is provided around the core member, it is possible to improve manufacturing stability when the tape member is wound and workability when removing the sheath of the product cable.

DESCRIPTION OF SYMBOLS 1 ... Core electric wire, 2 ... Tape member, 3 ... Sheath, 4 ... Core material, 5 ... Conductor, 6 ... Insulating layer, 7 ... Inner sheath (1st coating layer), 8 ... Outer sheath (2nd coating layer) 10 ... Cable, 11 ... Cable manufacturing device, 12 ... Core wire supply reel, 14 ... Tape member supply reel, 16a ... Storage section, 16 ... Inner sheath coating section, 17 ... Outer sheath coating section, 17a ... Storage section , 18 ... cooling section, 19 ... cable winding reel, 20 ... blade, 100 ... core electric wire with tape.

Claims (5)

A core wire including a conductor and an insulating layer formed around the conductor is formed by twisting a plurality of wires, a tape member wound around the core wire, and around the tape member A cable comprising: a formed covering layer;
The tape member is spirally wound while overlapping a part of the core electric wire, the thickness of the tape member is in the range of 0.025 to 0.035 mm, and the width of the tape member is 15 to A cable having a range of 25 mm and a region where the tape member overlaps by being wound in the spiral shape is in a range of 1/8 to 1/3 of the width of the tape member.   The cable according to claim 1, wherein the covering layer includes a first covering layer formed around the tape layer and a second covering layer formed around the first covering layer. A step of forming a core electric wire by twisting a plurality of core materials including a conductor and an insulating layer formed around the conductor, a step of winding a tape member around the core electric wire, and a periphery of the tape member Forming a coating layer on the cable, comprising:
In the step of winding the tape member, the tape member is wound spirally while overlapping a part of the tape member around the core electric wire, and the thickness of the tape member is in a range of 0.025 to 0.035 mm. The method of manufacturing a cable in which the width of the tape member is in the range of 15 to 25 mm, and the region where the tape member overlaps is wound in the spiral shape to be in the range of 1/8 to 1/3 of the width of the tape member.   The cable winding method according to claim 3, wherein the step of winding the tape member winds the tape member around the core electric wire with a tension of the tape member in a range of 2 to 6N. The cable manufacturing method according to claim 3, comprising a step of forming a first coating layer around the tape member and a step of forming a second coating layer around the first coating layer. .

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