Inter-wire cutoff material and wire harness

Abstract

To provide an inter-wire cutoff material capable of suppressing peeling of a first tape, and a wire harness.SOLUTION: An inter-wire cutoff material 3 fills a gap between a plurality of wires 2. The plurality of wires 2 is respectively inserted into a plurality of grooves 31 of the inter-wire cutoff material 3. A protrusion 33 of the inter-wire cutoff material 3 forms a step 32 over an entire circumference of the wire 2 in an axial direction on an outer side face between the groove 31 and the groove 31. A butyl tape 4 is wound adjacently to the step 32 on a rear side of the step 32. An adhesive tape 5 is wound from the butyl tape 4 to a front side of the step 32.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an inter-wire waterstop material and a wire harness. [Background technology]

[0002] Conventionally, a watertight structure using an inter-wire watertight material has been known as a structure for filling the gap between multiple electric wires and grommets that cover the electric wires to stop water from leaking in. Conventional inter-wire watertight materials are formed in the shape of a square pillar, with multiple grooves on the side into which the multiple electric wires are fitted. With the electric wires fitted in these grooves, butyl tape (first tape) is wrapped around the electric wires and the inter-wire watertight material. Then, adhesive tape (second tape) is wrapped around the butyl tape and the outer surface of the inter-wire watertight material to secure the butyl tape in place. Summary of the Invention [Problem to be solved by the invention]

[0003] The butyl tape mentioned above is thick. This creates a gap between the butyl tape and the outer surface of the inter-wire waterstop material. Since adhesive tape must be wrapped around this gap, the workability of wrapping the adhesive tape is poor, and there is a high possibility that the butyl tape will peel off.

[0004] The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide an inter-wire waterstop material and a wire harness that can suppress peeling of the first tape. [Means for solving the problem]

[0005] In order to achieve the above-mentioned object, the water blocking material between electric wires according to the present invention has the following features. A water stop material between electric wires that fills gaps between a plurality of electric wires, a plurality of grooves into which the plurality of electric wires are respectively inserted; a protrusion that forms a step portion on an outer surface between the grooves over the entire circumference of the electric wire in the axial direction, It must be a waterproof material between electric wires.

[0006] In order to achieve the above-mentioned object, the wire harness according to the present invention has the following features. A plurality of wires; an inter-wire water stop material that fills gaps between the plurality of electric wires; a first tape wrapped around the plurality of electric wires and the inter-wire waterstop material; a second tape wound around the outside of the first tape, The water stop material between electric wires is a plurality of grooves into which the plurality of electric wires are inserted; a protrusion that forms a step portion on an outer surface between the grooves over the entire circumference of the electric wire in the axial direction, the first tape is wound adjacent to the step portion on a side farther from the protrusion than the step portion, the second tape is wound around the first tape from the step portion to the protrusion portion side, It is a wire harness. [Effects of the Invention]

[0007] The inter-wire waterstop material and the wire harness according to the present invention have the effect of suppressing peeling of the first tape.

[0008] The present invention has been briefly described above. The details of the present invention will become clearer by reading the following detailed description of the invention (hereinafter referred to as "embodiments") with reference to the accompanying drawings. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a side view showing one embodiment of a wire harness provided with an inter-wire water blocking material of the present invention. [Figure 2] FIG. 2 is a side view of the wire harness shown in FIG. 1 before the adhesive tape is wound thereon. [Figure 3]FIG. 3 is a perspective view of the inter-wire water blocking material shown in FIG. [Figure 4] FIG. 4 is a rear view of the wire harness shown in FIG. 1 before the butyl tape and the adhesive tape are wound thereon. DETAILED DESCRIPTION OF THE INVENTION

[0010] Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0011] For convenience of explanation, "front," "rear," "left," "right," "upper," and "lower" will be defined below as shown in Figures 1 to 4. The "front-rear direction," "left-right direction," and "up-down direction" are perpendicular to each other.

[0012] As shown in FIG. 1, the wire harness 1 includes a plurality of electric wires 2, an inter-wire water sealing material 3 that fills the gaps between the plurality of electric wires 2, a butyl tape 4 (see FIG. 2) as a first tape wrapped around the plurality of electric wires 2 and the inter-wire water sealing material 3, and an adhesive tape 5 as a second tape wrapped around the outside of the butyl tape 4.

[0013] The electric wires 2 are well-known electric wires each composed of a conductor having a circular cross section and an insulating coating that covers the conductor. In this embodiment, the wire harness 1 includes three electric wires 2.

[0014] 3 and 4, the inter-wire waterstop material 3 is made of an elastic material such as rubber. The inter-wire waterstop material 3 is provided in the shape of a long cylinder extending in the front-to-rear direction, which is the longitudinal direction of the electric wires 2. The inter-wire waterstop material 3 has a plurality of grooves 31 into which the plurality of electric wires 2 are fitted (inserted), and protrusions 33 that form step portions 32 on the outer surface between the grooves 31 around the entire circumference of the electric wires 2 in the axial direction.

[0015] In this embodiment, three grooves 31 are provided, which is the same number as the number of electric wires 2. The grooves 31 extend along the longitudinal direction and penetrate in the longitudinal direction. As shown in FIG. 3 , a plurality of lips 31A are provided on the inner surface of the groove 31 and are arranged along the front-rear direction. In this embodiment, three lips 31A are provided. The three lips 31A are provided so as to extend in the direction around the axis of the electric wire 2. When the electric wire 2 is inserted into the groove 31, the lips 31A are crushed to seal around the axis of the electric wire 2.

[0016] A pair of locking claws 31B, 31B that protrude toward each other are provided on a pair of edges that form the opening of the groove 31. The locking claws 31B are provided at the same position as the lip 31A in the front-rear direction. The locking claws 31B lock the electric wire 2 fitted in the groove 31 so that the electric wire 2 does not fall out of the opening.

[0017] The step portion 32 and the protrusion 33 are provided forward of the lip 31A and the locking claw 31B. The step portion 32 and the protrusion 33 are provided around the entire circumference in the axial direction except for the portion where the groove portion 31 is provided. The inter-wire water blocking material 3 is provided with the same outer diameter from the rear end to the step portion 32. The step portion 32 is provided on a surface perpendicular to the front-to-rear direction. The height of the step portion 32 is set to be the same as the thickness of the butyl tape 4 described below.

[0018] In the inter-wire water sealing material 3, the outer surface between the step portion 32 and the front end (the tip closer to the protrusion 33 than the step portion 32) is provided as an inclined surface whose diameter decreases toward the front end. The outer diameter of the front end of the inter-wire water sealing material 3 is set smaller than the outer diameter on the rear side of the step portion 32 (the side farther from the protrusion 33).

[0019] The butyl tape 4 is made of butyl rubber that can be easily deformed by applying an external force, and has an adhesive layer on one side. As shown in Fig. 2, the butyl tape 4 is wrapped around the rear side of the stepped portion 32 of the inter-wire waterstop material 3 adjacent to the stepped portion 32. More specifically, the butyl tape 4 is wrapped around the stepped portion 32 so that it abuts against the stepped portion 32.

[0020] The adhesive tape 5 is wound around from the rear end of the butyl tape 4 to the front end of the inter-wire water blocking material 3.

[0021] Next, a manufacturing process of the wire harness 1 having the above-described configuration will be described. First, the electric wires 2 are inserted into the grooves 31 of the inter-wire waterstop material 3. Next, as shown in Fig. 2, a butyl tape 4 is wound around the wire harness 1 adjacent to the rear end of the stepped portion 32. After that, an adhesive tape 5 is wound around the wire harness 1 from the rear end of the butyl tape 4 to the front end of the inter-wire waterstop material 3 to complete the wire harness 1.

[0022] According to the embodiment described above, the inter-wire water sealing material 3 has the protrusions 33 that form the step portions 32 on the outer surface between the groove portions 31 around the entire circumference of the electric wires 2 in the axial direction. The protrusions 33 that form the step portions 32 eliminate the step between the butyl tape 4 and the inter-wire water sealing material 3, improving the workability of wrapping the adhesive tape 5 and preventing the butyl tape 4 from peeling off.

[0023] According to the above-described embodiment, the outer surface between the step portion 32 and the front end of the inter-wire waterstop material 3 is provided as an inclined surface whose diameter decreases toward the front end. This allows the adhesive tape 5 to be gently wound down along the inclined surface from the butyl tape 4 to the front end of the inter-wire waterstop material 3, further improving workability and preventing the butyl tape 4 from peeling off.

[0024] According to the above-described embodiment, the outer diameter of the front end of the inter-wire water blocking material 3 is set smaller than the outer diameter of the rear end side of the stepped portion 32. This allows the plurality of wires 2 to be gathered close to each other on the front end side.

[0025] The present invention is not limited to the above-described embodiments, and can be appropriately modified, improved, etc. Furthermore, the material, shape, size, number, location, etc. of each component in the above-described embodiments are arbitrary and not limited as long as they can achieve the present invention.

[0026] According to the embodiment described above, the height of the step portion 32 is set to be the same as the thickness of the butyl tape 4, but this is not limited to this. The height of the step portion 32 may be a height that reduces the step between the butyl tape 4 and the inter-wire waterstop material 3, and may be slightly higher or slightly lower than the thickness of the butyl tape 4.

[0027] In the above-described embodiment, the outer surface of the inter-wire water stop material 3 between the step portion 32 and the front end is provided as an inclined surface, but this is not limited thereto. The inter-wire water stop material 3 may be provided with the same diameter from the step portion 32 to the front end.

[0028] According to the above-described embodiment, the inter-wire water blocking material 3 is provided in a cylindrical shape, but this is not limitative and the inter-wire water blocking material 3 may be provided in a rectangular column shape.

[0029] Here, the features of the embodiments of the inter-wire waterstop material and the wire harness according to the present invention will be briefly summarized and listed below in [1] to [4].

[0030] [1] A water-stopping material (3) between electric wires (2) that fills gaps between the electric wires, a plurality of grooves (31) into which the plurality of electric wires (2) are respectively inserted; and a protrusion (33) that forms a step portion (32) on an outer surface between the groove portions (31) around the entire circumference of the electric wire (2) in the axial direction. Water stop material between electric wires (3).

[0031] According to the inter-wire water sealing material (3) having the configuration [1] above, by wrapping the first tape (4) adjacent to the step portion (32) on the side farther from the protrusion (33) than the step portion (32), it is possible to eliminate or reduce the step between the first tape (4) and the inter-wire water sealing material (3). This improves the workability of wrapping the second tape (5) over the first tape (4) and prevents the butyl tape (4) from peeling off.

[0032] [2] In the inter-wire water stop material (3) according to [1], The inter-wire water blocking material (3) is provided in a cylindrical shape, The outer surface between the step portion (32) and a tip end on the protrusion (33) side (front side) of the step portion (32) is provided as an inclined surface whose diameter decreases toward the tip end. Water stop material between electric wires (3).

[0033] According to the inter-wire water-sealing material (3) having the configuration [2] above, the second tape (5) can be gently wound down along the inclined surface from the first tape (4) to the tip (front end) of the inter-wire water-sealing material (3), thereby further improving workability and preventing the first tape (4) from peeling off.

[0034] [3] In the inter-wire water stop material (3) described in [2], The outer diameter of the tip is set smaller than the outer diameter of the side farther from the protrusion (33) than the step portion (32). Water stop material between electric wires (3).

[0035] According to the inter-wire water blocking material (3) having the above-mentioned configuration [3], it is possible to gather a plurality of wires (2) close to each other at the tip side.

[0036] [4] A plurality of electric wires (2); a water-stopping material (3) between the electric wires (2) that fills gaps between the electric wires (2); a first tape (4) wrapped around the plurality of electric wires (2) and the inter-wire waterstop material (3); a second tape (5) wound around the outside of the first tape (4), The inter-wire water blocking material (3) is a plurality of grooves (31) into which the plurality of electric wires (2) are fitted; a protrusion (33) that forms a step portion (32) on an outer surface between the groove portions (31) around the entire circumference of the electric wire (2) in the axial direction, the first tape (4) is wound adjacent to the step portion (32) on a side farther from the protrusion (33) than the step portion (32); The second tape (5) is wound from the first tape (4) to the protrusion (33) side of the stepped portion (32). Wire harness (1).

[0037] According to the wire harness (1) having the above-mentioned configuration (4), it is possible to eliminate or reduce the step between the first tape (4) and the inter-wire water sealing material (3), thereby improving the workability of winding the second tape (5) over the first tape (4) and suppressing peeling of the butyl tape (4). [Explanation of symbols]

[0038] 1 Wire harness 2 electric wire 3. Water-stopping material between electric wires 4 Butyl tape (first tape) 5 Adhesive tape (second tape) 31 Groove 32 Step 33 Protrusion

Claims

1. A water stop material between electric wires that fills gaps between a plurality of electric wires, a plurality of grooves into which the plurality of electric wires are respectively inserted; a protrusion that forms a step portion on an outer surface between the grooves over the entire circumference of the electric wire in the axial direction, Water-stopping material between electric wires.

2. The water stop material between electric wires according to claim 1, The inter-wire waterstop material is provided in a cylindrical shape, the outer surface between the step portion and a tip end closer to the protrusion than the step portion is provided as an inclined surface whose diameter decreases toward the tip end, Water-stopping material between electric wires.

3. The water stop material between electric wires according to claim 2, The outer diameter of the tip is set smaller than the outer diameter of the side farther from the protrusion than the step portion. Water-stopping material between electric wires.

4. A plurality of wires; an inter-wire water stop material that fills gaps between the plurality of electric wires; a first tape wrapped around the plurality of electric wires and the inter-wire waterstop material; a second tape wound around the outside of the first tape, The water stop material between electric wires is a plurality of grooves into which the plurality of electric wires are inserted; a protrusion that forms a step portion on an outer surface between the grooves over the entire circumference of the electric wire in the axial direction, the first tape is wound adjacent to the step portion on a side farther from the protrusion than the step portion, the second tape is wound around the first tape from the step portion to the protrusion portion side, Wire harness.

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