JP7357565B2 - Electric wire protector - Google Patents

Description

The present invention relates to a wire protector.

Conventionally, wire protectors have been used that cover one or more wires to protect the wire surfaces from external damage, dirt, dust, etc. In addition to the above, this wire protector also has the function of suppressing the intrusion of electromagnetic waves from the outside and suppressing the leakage of electromagnetic waves from the enclosed wires (for example, see Patent Applications 1 and 2). .

JP 2017-121113 Publication Japanese Patent Application Publication No. 11-121969

It is desired that the above electric wire protector not only protect the surface of the electric wire, but also improve shielding performance against leakage and intrusion of electromagnetic waves.

An object of the present invention is to provide a wire protector with excellent shielding properties against electromagnetic waves.

One aspect of the present disclosure includes an insulating sheet, a conductive sheet laminated on the inner surface side of the insulating sheet, and an opening/closing part connecting two opposing sides of the insulating sheet so as to be openable and closable. , the opening/closing part is provided with a first connecting piece provided along one end on the outer side of the insulating sheet, and the other end on the inner side of the insulating sheet, and the first connecting piece is provided along the other end on the inner side of the insulating sheet. a second connecting piece that is detachable from the first connecting piece; a loop portion formed by folding the conductive sheet back into a substantially U-shape is formed on the inner surface side of the one end portion of the insulating sheet; The folded portion of the conductive sheet forming the loop portion is joined to the inner surface side of the insulating sheet so as to overlap with the region of the first connecting piece, and the portion inside the loop portion is attached to the one end portion. A core material is arranged along the insulating sheet, the one end and the other end of the insulating sheet are rolled so as to overlap, and the one end and the other end are connected at the opening/closing part. , a wire protector in which the loop portion and the other end portion of the conductive sheet are in contact with each other to form a radio wave shield space inside.

According to the present disclosure, it is possible to provide a wire protector with excellent electromagnetic wave shielding properties.

FIG. 2 is a perspective view of the wire protector 1 viewed from the insulating sheet 10 side. FIG. 2 is a perspective view of the wire protector 1 viewed from the side of a conductive sheet 20. FIG. FIG. 3 is a side view of the wire protector 1 shown in FIG. 2 when viewed from the Y1 direction. (A) to (C) are diagrams illustrating a procedure for covering an electric wire with the electric wire protector 1. FIG. 4C is a sectional view taken along line II in FIG. 4(C). It is a figure which shows the covering state when both ends of the electric wire 2 are connected to another member.

Embodiments of the wire protector according to the present invention will be described below. Note that the drawings attached to this specification are all schematic diagrams, and the shape, scale, vertical and horizontal dimensional ratios, etc. of each part are changed or exaggerated from the actual ones in consideration of ease of understanding. In particular, the thickness of the wire protector is exaggerated compared to the actual thickness in order to make the configuration easier to understand. Further, in the drawings, hatching indicating cross sections of members is omitted as appropriate.
In this specification, etc., when the electric wire protector 1 is viewed from above, the width direction is the X (X1-X2) direction, the longitudinal direction is the Y (Y1-Y2) direction, and the thickness direction is the Z (Z1-Z2) direction. It will be explained as follows. Furthermore, in this specification and the like, the "~ direction" is also appropriately referred to as the "~ side."

1 and 2 are perspective views of the electric wire protector 1 according to the embodiment, which is unfolded into a sheet shape. Of these, FIG. 1 is a perspective view of the wire protector 1 viewed from the insulating sheet 10 side. FIG. 2 is a perspective view of the wire protector 1 viewed from the conductive sheet 20 side. FIG. 3 is a side view of the wire protector 1 shown in FIG. 2 when viewed from the Y1 direction.

As shown in FIG. 1, the wire protector 1 includes an insulating sheet 10, a conductive sheet 20, a zipper tape 30, and a core material 40.
The insulating sheet 10 is a sheet that serves as an outer cover when the electric wire protector 1 is rolled into a cylindrical shape (hereinafter also referred to as "usable shape"). The insulating sheet 10 is made of a material that has excellent heat resistance, flexibility, bending resistance, bending resistance, electrical insulation, and the like. As the insulating sheet 10, for example, a single substance of polyvinyl chloride, polyethylene, polyimide, or polyester, or a composite thereof is used.

A zipper tape (opening/closing part) 30 is provided on the insulating sheet 10. The zipper tape 30 is a band-shaped component that connects two opposing sides of the insulating sheet 10 in the X direction (short direction) so as to be openable and closable when the electric wire protector 1 is in a used shape. The zipper tape 30 is composed of a first chuck piece 31 and a second chuck piece 32. As shown in FIG. 3, the first chuck piece (first connection piece) 31 is provided at the end on the X1 side on the outer surface side (Z1 side) of the insulating sheet 10. In FIG. 3, the connecting surface 31a of the first chuck piece 31 faces toward the Z1 side. The second chuck piece (second connection piece) 32 is provided at the end on the X2 side on the inner surface side (Z2 side) of the insulating sheet 10. In FIG. 3, the connecting surface 32a of the second chuck piece 32 faces toward the Z2 side.

The first chuck piece 31 and the second chuck piece 32 are sewn onto the insulating sheet 10 by a sewing machine. Therefore, as shown in FIGS. 1 and 2, two rows of stitch portions 33 are formed in the first chuck piece 31 and the second chuck piece 32, respectively, along the Y direction. As the zipper tape 30, for example, in addition to the opening/closing device disclosed in Japanese Unexamined Patent Publication No. 2002-145313, it is possible to use a device having an equivalent function.

The coupling mechanisms of the first chuck piece 31 and the second chuck piece 32 have opposite shapes. That is, if the first chuck piece 31 (connection surface 31a) is a male mechanism, the second chuck piece 32 (connection surface 32a) is a female mechanism, and if the first chuck piece 31 is a female mechanism, the second chuck piece 32 (connection surface 32a) is a female mechanism. Piece 32 serves as a male mechanism. In addition, in FIG. 1 etc., illustration of the male/female mechanism in each connection surface of the 1st chuck piece 31 and the 2nd chuck piece 32 is abbreviate|omitted.

The conductive sheet 20 is a sheet that becomes the inner skin when the electric wire protector 1 is put into use. The conductive sheet 20 is laminated on the inner surface side (Z2 side) of the insulating sheet 10. The conductive sheet 20 is made of a material with excellent flexibility, bending durability, bending resistance, and electrical conductivity. As the conductive sheet 20, for example, metal foil, metal plate, metal mesh, carbon mesh, nanocarbon, hybrid fiber, hybrid mesh, etc. are used. More specifically, copper foil with excellent shielding properties, thin conductive rubber sheets, non-woven fabric made of polyester plated with nickel and copper, and urethane foam plated with copper and nickel coated with conductive acrylic are used. It will be done.

Although not shown, a thin film of a thermoplastic resin layer (hereinafter also referred to as a "thermal adhesive layer") such as polyethylene (PE) or polypropylene (PP) is formed on one side of the conductive sheet 20. The insulating sheet 10 and the conductive sheet 20 are joined by overlapping the surface of the conductive sheet 20 on which the heat welding layer is formed with the insulating sheet 10 and melting the heat welding layer by heat welding. Note that the insulating sheet 10 and the conductive sheet 20 are partially joined by thermal welding. In the heat welding layer, the portion that is not heat welded becomes an insulating layer on one side of the conductive sheet 20.

As shown in FIG. 2, the X2 side end 20a of the conductive sheet 20 is provided to a position where it comes into contact with the side edge 32s of the second chuck piece 32. On the other hand, a loop portion 21 is formed at the end of the conductive sheet 20 on the X1 side. The loop portion 21 is a portion where the X1 side end portion of the conductive sheet 20 is folded back into a substantially U-shape. By providing the loop portion 21 in the conductive sheet 20, when the wire protector 1 is rolled up into a cylindrical shape, the contact area between the end on the X1 side and the end on the X2 side of the conductive sheet 20 can be increased. can. Thereby, the end on the X1 side and the end on the X2 side of the conductive sheet 20 can be brought into contact over a wider area.

By contacting the X1 side end and the X2 side end of the conductive sheet 20 over a wide area, the electromagnetic waves emitted in multiple directions from the enclosed electric wire are absorbed by the conductive sheet 20 rolled into a cylindrical shape. Since it can be rotated along the circumferential direction, electromagnetic waves emitted from the enclosed electric wire in multiple directions can be efficiently absorbed by the conductive sheet 20. In addition, since an electromagnetic wave shielding space is formed inside the electric wire protector 1 by the contact between the X1 side end (loop part 21) and the X2 side end of the conductive sheet 20, the enclosed electric wire It is possible to suppress the leakage of electromagnetic waves emitted from the outside and the intrusion of electromagnetic waves from the outside.

As shown in FIG. 3, the folded portion 21a of the loop portion 21 (hereinafter also referred to as “folded portion”) is located on the inner surface side (Z2 side) of the insulating sheet 10 so as to overlap with the area of the first chuck piece 31. ) is joined by heat welding. By arranging the folded portion 21a of the conductive sheet 20 so as to overlap the area of the first chuck piece 31, leakage of electromagnetic waves from the needle hole (not shown) formed in the stitched portion 33 of the first chuck piece 31 is prevented. can be suppressed.

Further, as shown in FIG. 3, in the loop portion 21, the end 21b of the folded portion 21a is in contact with the conductive sheet 20. Thereby, the loop portion 21 has a continuous annular shape. Further, as will be described later, when the wire protector 1 is rolled into a cylindrical shape to be used, a portion of the loop portion 21 comes into contact with the end of the conductive sheet 20 on the X2 side. Thereby, the conductive sheet 20 has an annularly connected shape as a whole.
Although not shown, a ground wire is connected to the conductive sheet 20. The electromagnetic waves absorbed by the conductive sheet 20 are guided to the ground wire as an induced current. Note that the ground wire is connected to the conductive sheet 20 by, for example, soldering.

As shown in FIG. 2, a core material 40 is arranged inside the loop portion 21 along the X1 side end of the conductive sheet 20. The core material 40 is used to prevent the inner surface of the loop portion 21 from sticking and being crushed when the folded portion 21a of the loop portion 21 is thermally welded to the inner surface of the insulating sheet 10. It is a member. As the core material 40, it is desirable to use a resin that has higher heat resistance than the temperature at the time of thermal welding (approximately 100 to 200° C.) and has high resilience from a compressed state. Furthermore, in addition to resin, fibers, rubber, etc. having equivalent heat resistance and restoring power may be used. The cross-sectional shape of the core material 40 is desirably elliptical, circular, etc. in order to suppress damage to the conductive sheet 20 when the wire protector 1 in the used shape is bent. The thickness of the core material 40 varies depending on the size of the loop portion 21 and the like, but is, for example, about 1.5 to several mm.

The core material 40 is placed inside the loop portion 21 when the end portion on the X1 side of the conductive sheet 20 is folded back into a substantially U-shape to form the loop portion 21 . The folded portion 21a of the loop portion 21 and the inner surface of the insulating sheet 10 are thermally welded with the core material 40 disposed inside the loop portion 21. Specifically, the folded portion 21a of the loop portion 21 and the inner surface of the insulating sheet 10 are overlapped and pressed while applying heat with a roller (not shown), so that the two are joined by thermal welding. .

When the folded portion 21a of the loop portion 21 and the inner surface of the insulating sheet 10 are overlapped and thermally welded, the loop portion 21 is temporarily collapsed, but due to the restoring force of the core material 40, the loop portion 21 is The cross section can be returned to approximately its original shape (eg, elliptical). Further, when heat welding is performed, sticking of the inner surface of the loop portion 21 is also suppressed. As shown in FIG. 3, by forming the loop portion 21 into a three-dimensionally raised shape, when the electric wire protector 1 is put into the used shape, a part of the loop portion 21 and the end of the conductive sheet 20 on the X2 side The area of contact with the parts can be increased.

Next, a procedure for covering an electric wire with the electric wire protector 1 of this embodiment will be explained.
FIGS. 4A to 4C are diagrams illustrating a procedure for covering an electric wire with the electric wire protector 1. FIG. 5 is a sectional view taken along line II in FIG. 4(C). FIG. 6 is a diagram showing a covered state when both ends of the electric wire 2 are connected to other members.
First, as shown in FIG. 4(A), the electric wire 2 is placed on the conductive sheet 20 of the electric wire protector 1 developed into a sheet. Although FIG. 4 shows an example in which a plurality of electric wires 2 are included in the electric wire protector 1, the electric wire 2 may be singular. Note that in FIGS. 4(A) to 4(C), the shape of the wire protector 1 is illustrated in a simplified manner. Further, the portions of the zipper tape 30 (31, 32) are shown with diagonal lines.

Next, as shown in FIG. 4(B), the end of the wire protector 1 on the X1 side is folded back to the X2 side and placed over the wire 2. As a result, the first chuck piece 31 provided at the end of the wire protector 1 on the X1 side faces the Z2 side (the front side in the figure). Next, the end of the wire protector 1 on the X2 side is folded back to the X1 side, and the connecting surface 32a of the second chuck piece 32 of the wire protector 1 and the connecting surface 31a of the first chuck piece 31 are overlapped, The connecting surface 32a of the second chuck piece 32 is pressed against the connecting surface 31a of the first chuck piece 31. Thereby, as shown in FIG. 4(C), the first chuck piece 31 and the second chuck piece 32 are connected, and the zipper tape 30 can be closed.

By closing the zipper tape 30, the periphery of the plurality of electric wires 2 can be covered with the electric wire protector 1, as shown in FIG. Note that in the closed state of the zipper tape 30, the zipper tape 30 can be opened by peeling off the connecting surface 32a of the second zipper piece 32 from the connecting surface 31a of the first zipper piece 31.

Since the electric wire protector 1 of this embodiment is rolled up into a cylinder from a sheet-like state, the terminals 3 and 4 at both ends of the electric wire 2 are fixed to other members 5 and 6, as shown in FIG. It can be easily installed. Moreover, since the electric wire protector 1 of this embodiment has flexibility and bendability, even when the electric wire 2 is bent, it can be attached to the electric wire 2 in a usage shape that matches the bending of the electric wire 2.

According to the electric wire protector 1 of this embodiment, the following effects are achieved, for example.
Since the wire protector 1 has the loop portion 21 at the end of the conductive sheet 20, when the wire protector 1 is rolled up into a cylindrical shape, the contact area between both ends of the conductive sheet 20 can be increased. Thereby, both ends of the conductive sheet 20 can be brought into contact over a wider area. By bringing both ends of the conductive sheet 20 into contact over a wide area, electromagnetic waves emitted from the enclosed electric wire in multiple directions can be rotated along the circumferential direction of the conductive sheet 20 rolled into a cylindrical shape. Therefore, electromagnetic waves emitted in multiple directions from the enclosed electric wire can be efficiently absorbed by the conductive sheet 20.

Due to the above-mentioned effect, in the electric wire protector 1 rolled into a cylindrical shape, electromagnetic waves emitted in multiple directions from the enclosed electric wire can be efficiently absorbed by the conductive sheet 20. Furthermore, by rolling the wire protector 1 into a cylindrical shape, the X1 side end and the X2 side end of the conductive sheet 20 come into contact, and an electromagnetic wave shielding space is formed inside the wire protector 1. Ru. Therefore, leakage of electromagnetic waves emitted from the enclosed electric wire to the outside and intrusion of electromagnetic waves from the outside can be suppressed. Furthermore, in the wire protector 1, the folded portion 21a of the loop portion 21 is joined to the inner surface of the insulating sheet 10 so as to overlap with the region of the first chuck piece 31. Therefore, leakage of electromagnetic waves from the needle hole (not shown) formed in the stitch portion 33 of the first chuck piece 31 can be suppressed. Therefore, the wire protector 1 of this embodiment has excellent electromagnetic wave shielding properties.

The wire protector 1 includes a zipper tape 30 as an opening/closing part that connects two opposing sides of the insulating sheet 10 in the X direction in an openable/closable manner. Since the zipper tape 30 does not generate static electricity, dust, etc. when opened and closed, it can be used safely in places where a clean environment is required, such as clean rooms, medical facilities, computer-related facilities, and IC manufacturing facilities. Furthermore, the zipper tape 30 can be opened and closed without a special tool, so it has excellent workability.

In the wire protector 1, the insulating sheet 10 and the conductive sheet 20 are joined by thermal welding. Therefore, the number of times the conductive sheet 20, which is made of a thin film such as copper foil, can be bent can be increased without breaking the conductive sheet 20.
In the conductive sheet 20 of the wire protector 1, a core material 40 is arranged inside the loop portion 21 along the end of the conductive sheet 20 on the X1 side. Therefore, when the folded portion 21a of the loop portion 21 is thermally welded to the inner surface of the insulating sheet 10, it is possible to prevent the inner surface of the loop portion 21 from sticking and being crushed.

By using a resin having heat resistance higher than the temperature during thermal welding as the core material 40, melting of the core material 40 during thermal welding can be suppressed. Furthermore, by using a resin that is heat resistant and has a high restoring force from a compressed state as the core material 40, the cross-sectional shape of the loop portion 21 can be returned to almost its original state after thermal welding. Furthermore, the wire protector 1 can be easily bent.

Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments, and various modifications and changes can be made, such as the modified embodiments described below, and these may also be disclosed in the present disclosure. included within the technical scope of Further, the effects described in the embodiments are merely a list of the most preferable effects resulting from the present disclosure, and are not limited to those described in the embodiments. In addition, although the above-mentioned embodiment and the modification mentioned later can also be used in combination suitably, detailed description is abbreviate|omitted.

(Deformed form)
The insulating sheet 10 and the conductive sheet 20 are not limited to thermal welding, and may be joined by, for example, double-sided tape, adhesive, or the like.
The first zipper piece 31 and the second zipper piece 32 of the zipper tape 30 are not limited to sewing, and may be attached to the insulating sheet 10 by, for example, adhesion, heat welding, or the like.
As the opening/closing part of the insulating sheet 10, a hook-and-loop fastener may be used instead of the zipper tape 30. The hook-and-loop fastener is not limited to sewing, and may be attached to the insulating sheet 10 by, for example, adhesion, heat welding, or the like.

A plurality of core materials 40 may be arranged inside the loop portion 21. Further, a resin layer is coated thickly on the X1 side end (inside) of the conductive sheet 20, and when the X1 side end of the conductive sheet 20 is folded back into a substantially U-shape, the loop portion 21 A portion where the resin layers overlap in a substantially U-shape may be formed inside, and this portion may be used as a core material.

1: Wire protector 10: Insulating sheet 20: Conductive sheet 30: Zipper tape (opening/closing part)
31: First chuck piece (first connecting piece)
32: Second chuck piece (second connecting piece)
40: Core material

Claims (5)

an insulating sheet,
a conductive sheet laminated on the inner surface side of the insulating sheet;
an opening/closing part that connects two opposing sides of the insulating sheet so as to be openable and closable;
Equipped with
The opening/closing part includes a first connecting piece provided along one end on the outer side of the insulating sheet, and a first connecting piece provided along the other end on the inner side of the insulating sheet. a second connecting piece that is detachable from the second connecting piece;
A loop portion is formed by folding the conductive sheet back into a substantially U-shape on the inner surface side of the one end portion of the insulating sheet, and the portion of the conductive sheet that forms the loop portion is folded back. A core material is bonded to the inner surface of the insulating sheet so as to overlap with the region of the first connecting piece, and a core material is disposed inside the loop portion along the one end portion,
The core material is formed of a resin having a heat resistance higher than the temperature at which the insulating sheet and the conductive sheet are thermally welded,
The loop portion of the conductive sheet and the A wire protector that comes in contact with the other end to form a radio wave shield space inside. The wire protector according to claim 1,
The opening/closing part is a wire protector made of zipper tape or a hook-and-loop fastener. The electric wire protector according to claim 1 or 2,
In the wire protector, the insulating sheet and the conductive sheet are joined by thermal welding. In the electric wire protector according to any one of claims 1 to 3,
The insulating sheet is a wire protector made of polyvinyl chloride, polyethylene, polyimide, or polyester, or a composite thereof. In the electric wire protector according to any one of claims 1 to 4,
The conductive sheet is a wire protector in which the conductive sheet is formed of metal foil, metal plate, metal mesh, carbon mesh, nanocarbon, hybrid fiber, or hybrid mesh.

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