JP6759693B2 - Noise suppression cable - Google Patents

Description

The present invention relates to a noise suppression cable.

Conventionally, noise suppression cables in which a magnetic tape is wound around an insulated wire have been proposed (see, for example, Patent Documents 1 and 2).

In this noise suppression cable, a magnetic metal tape (also referred to as a magnetic tape) having a predetermined width is wound around an insulated wire whose conductor wire is covered with an insulator at a predetermined interval in the longitudinal direction of the cable.

Magnetic tape is generally produced by slitting, that is, by continuously cutting a long rolled material having a large width with a constant width and winding it on a roll or a reel. According to the conventional noise suppression cable, the noise suppression effect is controlled by the tape length and the tape width. Further, the flexibility of the cable is improved by reducing the tape width of the magnetic tape, dividing the magnetic tape into a plurality of blocks, and arranging them at appropriate intervals.

JP-A-2002-25356 Japanese Unexamined Patent Publication No. 2015-198040

The magnetic tapes arranged at appropriate intervals need to be fixed so that the arrangement position can be maintained.

Therefore, an object of the present invention is to provide a noise suppression cable capable of preventing positional deviation of magnetic tapes arranged at appropriate intervals.

The present invention provides the following noise suppression cable in order to achieve the above object.

[1] An insulated wire in which the outer periphery of the conductor wire is covered with an insulator, a shield layer provided on the outer periphery of the insulated wire, and an outer periphery of the shield layer are provided at predetermined intervals along the longitudinal direction of the cable. A plurality of magnetic tape layers, a resin tape layer for insulating the shield layer and the plurality of magnetic tape layers, and a double-sided adhesive layer for fixing the plurality of magnetic tape layers to the resin tape layer are provided. Noise suppression cable.
[2] The noise suppression cable according to the above [1], wherein the double-sided adhesive layer is provided in a long shape along the longitudinal direction of the cable.
[3] The noise suppression cable according to the above [2], wherein the long double-sided adhesive layer has a width of 3 mm or more and 25 mm or less in the cable circumferential direction.
[4] The noise suppression cable according to the above [1], wherein the double-sided adhesive layer is provided at predetermined intervals along the longitudinal direction of the cable.
[5] The noise suppression cable according to any one of [1] to [4], wherein the double-sided adhesive layer is made of double-sided tape.
[6] The noise suppression cable according to any one of [1] to [4], wherein the double-sided adhesive layer is made of an adhesive.

According to the present invention, it is possible to provide a noise suppression cable capable of preventing misalignment of magnetic tapes arranged at appropriate intervals.

FIG. 1 is a front view showing a schematic configuration of a noise suppression cable according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of the noise suppression cable shown in FIG. FIG. 3 is a front view showing a schematic configuration of a noise suppression cable according to a second embodiment of the present invention. FIG. 4 is a cross-sectional view of the noise suppression cable shown in FIG. 5A to 5D are diagrams showing an example of a manufacturing process of the noise suppression cable according to the first embodiment of the present invention. 6A to 6C are diagrams showing an example of a manufacturing process of the noise suppression cable according to the second embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, components having substantially the same function are designated by the same reference numerals, and duplicate description thereof will be omitted.

[First Embodiment]
FIG. 1 is a front view showing a schematic configuration of a noise suppression cable according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of the noise suppression cable shown in FIG. In FIG. 1, the inclusions 4 and the resin tape layers 5A and 5C are not shown.

The noise suppression cable 10 includes a plurality of (three in the present embodiment) insulated wires 3 in which the outer periphery of the conductor wire 1 is covered with an insulator 2, and inclusions made of paper or the like around the plurality of insulated wires 3. The resin tape layer 5A formed by winding the resin tape with the resin tape 4 interposed therebetween, the shield layer 6 provided on the outer periphery of the resin tape layer 5A, and the resin tape layer 5B provided on the outer periphery of the shield layer 6. To fix a plurality of magnetic tape layers 8 having a predetermined width W ₈ provided on the outer periphery of the resin tape layer 5B with a predetermined interval D in the longitudinal direction of the cable and the plurality of magnetic tape layers 8 to the resin tape layer 5B. The double-sided adhesive layer 7A, the resin tape layer 5B, the double-sided adhesive layer 7A, the resin tape layer 5C provided on the outer periphery of the plurality of magnetic tape layers 8, and the sheath 9 as an insulating protective layer made of resin or the like are provided. ..

(Insulated wire 3)
The insulated wire 3 transmits, for example, electric power or a signal having a frequency of 100 kHz to 1 MHz. Although the number of the insulated wires 3 is a plurality in the present embodiment, one may be used. Further, the insulated wire 3 may be a twisted pair wire that transmits a differential signal.

(Resin tape layers 5A to 5C)
The resin tape layer 5A is formed by wrapping a resin tape around a plurality of insulated electric wires 3 with inclusions 4 interposed therein and around them in the longitudinal direction of the cable.

The resin tape layer 5B is for insulating the shield layer 6 and the plurality of magnetic tape layers 8, and is formed by winding the resin tape around the outer periphery of the shield layer 6 in the longitudinal direction of the cable. Since it is sufficient that the shield layer 6 and the plurality of magnetic tape layers 8 can be insulated, the resin tape layer 5B is provided on the outer periphery of the shield layer 6 if the shield layer 6 and the plurality of magnetic tape layers 8 are provided so as not to come into direct contact with each other. It does not have to be provided all around. For example, a cable having a predetermined width W ₈ mm or more and W ₈ + X mm or less (for example, X = 1 to 3) with a predetermined interval D-2X mm or more and D mm or less according to the installation location of the magnetic tape layer 8. A plurality of them may be provided in the longitudinal direction. However, the resin tape layer 5B must be fixed to the outer periphery of the shield layer 6 so as not to be displaced.

The resin tape layer 5C is formed by winding a resin tape around the outer periphery of the resin tape layer 5B, the double-sided adhesive layer 7A, and the magnetic tape layer 8 in the longitudinal direction of the cable. Alternatively, as shown in FIGS. 5C and 5D described later, a resin tape layer 5C made of cellophane tape or the like may be attached along the double-sided adhesive layer 7A and the magnetic tape layer 8.

As the resin tape constituting the resin tape layers 5A to 5C, for example, a tape made of a resin such as polyethylene terephthalate (PET) or polypropylene resin can be used.

(Shield layer 6)
The shield layer 6 is formed by braiding a copper wire, for example, and is connected to the ground. The shield layer 6 may be a tape wrapped with a conductor, or may be a metal pipe such as a copper pipe.

(Double-sided adhesive layer 7A)
The double-sided adhesive layer 7A is provided in a long shape along the longitudinal direction of the cable. The width W _{7A in} the cable circumferential direction of the long double-sided adhesive layer 7A is preferably 3 mm or more and 25 mm or less, and more preferably 5 mm or more and 20 mm or less. A plurality of long double-sided adhesive layers 7A may be provided along the longitudinal direction of the cable, but preferably one or two, and one as shown in FIGS. 1 and 2. Is more preferable. When a plurality of cables are provided, it is preferable to provide the cables at a plurality of locations at substantially equal intervals in the circumferential direction of the cable. The double-sided adhesive layer 7A is preferably made of, for example, double-sided tape. The double-sided adhesive layer 7A may be composed of an adhesive, but an adhesive of a type that does not drip after being applied to the outer periphery of the resin tape layer 5B is preferable.

(Magnetic tape layer 8)
The magnetic tape layer 8 is formed by horizontally winding a magnetic tape having a width W ₈ around the outer circumference of the resin tape layer 5B. Not only one lap but also two or more laps may be wound. The width W ₈ is preferably, for example, 5 mm or more and 50 mm or less. The distance D between the magnetic tape layers 8 is preferably, for example, 5 mm or more and 50 mm or less. The magnetic tape is composed of, for example, a plurality of magnetic materials extending in a direction orthogonal to the width direction (winding direction) and a bonding sheet for joining the plurality of magnetic materials. The magnetic tape may be composed of a single magnetic material. It is preferable that the magnetic material is cut out from the rolled material so that the width direction of the magnetic tape is the rolling direction, and the magnetic permeability in the direction orthogonal to the width direction is larger than the magnetic permeability in the width direction. That is, it is preferable that the magnetic material has different magnetic characteristics (induced magnetic anisotropy) in the width direction and the direction orthogonal to the width direction.

The magnetic material constituting the magnetic tape is preferably made of a soft magnetic material having a small coercive force and a large magnetic permeability in order to suppress electromagnetic noise. As the soft magnetic material, for example, amorphous alloys such as Co-based amorphous alloys and Fe-based amorphous alloys, ferrites such as Mn-Zn-based ferrites, Ni-Zn-based ferrites, and Ni-Zn-Cu-based ferrites, Fe-Ni-based alloys ( Permalloy), Fe—Si—Al alloy (Sendust), Fe—Si alloy (silicon steel) and other soft magnetic metals can be used.

The magnetic tape layer 8 may be composed of two magnetic tapes bonded with a bonding tape as disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 2015-198040.

(Manufacturing process of noise suppression cable)
5A to 5D are diagrams showing an example of a manufacturing process of the noise suppression cable according to the first embodiment of the present invention. In FIGS. 5A to 5D, the inclusions 4 and the sheath 9 are not shown.

Up to the step of providing the resin tape layer 5B on the outer periphery of the shield layer 6, the cable can be manufactured in the same manner as a known cable manufacturing method. After the resin tape layer 5B is provided, a double-sided tape from which only the release paper on one side is peeled off is attached on the resin tape layer 5B in the longitudinal direction of the cable to provide the double-sided adhesive layer 7A (FIG. 5A). Thereafter, peel off the release paper on the other surface of the double-sided tape to expose the adhesive surface, the magnetic tape of the resin tape layer 5B and the double-sided adhesive layer 7A periphery to the width W ₈ of the wound lateral spacing of the cable in the longitudinal direction D is opened and wound around a plurality of places to provide a plurality of magnetic tape layers 8 (in FIG. 5B, only one magnetic tape layer 8 is shown). When the double-sided adhesive layer 7A is provided, the double-sided tape from which the release papers on both sides have been peeled off may be attached on the resin tape layer 5B. After that, the resin tape is wound on the magnetic tape layer 8 to provide the resin tape layer 5C, and the resin tape is further attached on the double-sided adhesive layer 7A to provide the resin tape layer 5C (in no particular order) (FIGS. 5C and 5D). Then, a sheath 9 (not shown) is covered to obtain a noise suppression cable 10.

(Effect of this embodiment)
According to the present embodiment, the following effects are obtained.
(1) Since the double-sided adhesive layer 7A is provided, it is possible to provide a noise suppression cable 10 capable of preventing the positional deviation of the magnetic tape layers 8 arranged at appropriate intervals.
(2) Since the step of providing the long double-sided adhesive layer 7A in the longitudinal direction of the cable is easier than the step of providing the double-sided adhesive layer 7B in the second embodiment described later, automation by the apparatus has a processing speed. It is possible to provide a method for manufacturing a noise suppression cable having excellent mass productivity.
(3) Since the magnetic tape layers 8 having a predetermined width are provided at predetermined intervals in the longitudinal direction of the cable, the flexibility is superior as compared with the case where the magnetic tape layers are provided over the entire length in the longitudinal direction of the cable. Is obtained.

[Second Embodiment]
FIG. 3 is a front view showing a schematic configuration of a noise suppression cable according to a second embodiment of the present invention. FIG. 4 is a cross-sectional view of the noise suppression cable shown in FIG. In FIG. 3, the inclusions 4 and the resin tape layers 5A and 5C are not shown.

The noise suppression cable 20 has a different structure of the double-sided adhesive layer from the noise suppression cable 10 according to the first embodiment described above. The noise suppression cable 20 includes a double-sided adhesive layer 7B instead of the double-sided adhesive layer 7A of the noise suppression cable 10.

(Double-sided adhesive layer 7B)
The double-sided adhesive layers 7B are provided at predetermined intervals along the longitudinal direction of the cable. The double-sided adhesive layer 7B is formed by horizontally winding a double-sided tape having a width of W _7B around the outer periphery of the resin tape layer 5B. The width W _7B may be thicker than the width W ₈ of the magnetic tape layer 8 as shown in FIG. 3, or may be thinner than the width W ₈ of the magnetic tape layer 8 as shown in FIG. 6B, but is magnetic. The width of the tape layer 8 is preferably substantially the same as the width W _8, and is preferably 3 mm or more and 55 mm or less, for example. The distance between the double-sided adhesive layers 7B is preferably, for example, 3 mm or more and 55 mm or less. The double-sided adhesive layer 7B is preferably made of double-sided tape, but may be made of an adhesive. The adhesive is preferably a type of adhesive that does not drip after being applied to the outer periphery of the resin tape layer 5B.

(Manufacturing process of noise suppression cable)
6A to 6C are diagrams showing an example of a manufacturing process of the noise suppression cable according to the second embodiment of the present invention. In FIGS. 6A to 6C, the inclusion 4 and the sheath 9 are not shown.

Up to the step of providing the resin tape layer 5B on the outer periphery of the shield layer 6, the cable can be manufactured in the same manner as a known cable manufacturing method. After providing the resin tape layer 5B, a double-sided tape from which only the release paper on one side has been peeled off is wound horizontally around the outer circumference of the resin tape layer 5B, and is wound and attached to a plurality of places at predetermined intervals in the longitudinal direction of the cable. A plurality of double-sided adhesive layers 7B are provided (only one double-sided adhesive layer 7B is shown in FIG. 6A). Thereafter, peel off the release paper on the other surface of the double-sided tape to expose the adhesive surface, the magnetic tape of the resin tape layer 5B and the double-sided adhesive layer 7B periphery to the width W ₈ of the wound lateral spacing of the cable in the longitudinal direction D is opened and wound around a plurality of places to provide a plurality of magnetic tape layers 8 (in FIG. 6B, only one magnetic tape layer 8 is shown). In addition, when providing the double-sided adhesive layer 7B, the double-sided tape from which the release papers on both sides have been peeled off may be attached on the resin tape layer 5B. After that, a resin tape is wound around the magnetic tape layer 8 to provide the resin tape layer 5C (FIG. 6C). Then, a sheath 9 (not shown) is covered to obtain a noise suppression cable 20.

(Effect of this embodiment)
According to the present embodiment, the following effects are obtained.
(1) Since the double-sided adhesive layer 7B is provided, it is possible to provide a noise suppression cable 20 capable of preventing the displacement of the magnetic tape layers 8 arranged at appropriate intervals.
(2) Since the magnetic tape layers 8 having a predetermined width are provided at predetermined intervals in the longitudinal direction of the cable, the flexibility is superior as compared with the case where the magnetic tape layers are provided over the entire length in the longitudinal direction of the cable. Is obtained.

The embodiment of the present invention is not limited to the above embodiment, and various embodiments are possible. Further, it is possible to omit or change a part of the constituent elements of the above-described embodiment without changing the gist of the present invention. For example, if there is no problem in winding the resin tape around the plurality of insulated wires 3, the inclusions 4 may be omitted.

10, 20: Noise suppression cable 1: Conductor wire, 2: Insulator, 3: Insulated wire, 4: Inclusions 5A to 5C: Resin tape layer, 6: Shield layer, 7A to 7B: Double-sided adhesive layer 8: Magnetic tape Layer, 9: sheath

Claims (6)

Insulated wire with the outer circumference of the conductor wire covered with an insulator,
A shield layer provided on the outer circumference of the insulated wire and
A plurality of magnetic tape layers composed of a single soft magnetic material and provided on the outer periphery of the shield layer at predetermined intervals along the longitudinal direction of the cable.
A resin tape layer for insulating the shield layer and the plurality of magnetic tape layers, and
A noise suppression cable provided with a double-sided adhesive layer for fixing the plurality of magnetic tape layers to the resin tape layer. The noise suppression cable according to claim 1, wherein the double-sided adhesive layer is provided in a long shape along the longitudinal direction of the cable. The noise suppression cable according to claim 1 or 2 , wherein the resin tape layer is wound around the outer periphery of the shield layer in the longitudinal direction of the cable and is fixed to the outer periphery of the shield layer . The noise suppression cable according to claim 1, wherein the double-sided adhesive layer is provided at predetermined intervals along the longitudinal direction of the cable. The noise suppression cable according to any one of claims 1 to 4, wherein the double-sided adhesive layer is made of double-sided tape. The noise suppression cable according to any one of claims 1 to 4, wherein the double-sided adhesive layer is made of an adhesive.

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