Cut-off member

Abstract

To provide a cut-off member capable of appropriately suppressing water immersion from three or more wires.SOLUTION: A cut-off member 1 includes: a columnar holding body 2 having at least three holding grooves 3 for holding wires. Each holding groove 3 is opened to a side of the holding body 2 and extends from one end to the other end in an axial direction X in the holding body 2. The holding groove 3 includes an opposite face 31 facing an outer peripheral face of the wire, and a cross section shape of the opposite face 31 is an arc shape. An arc-shaped rib 32 for sealing a part between the opposite face 31 and the outer peripheral face of the wire is provided in the holding groove 3.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a waterproof member. [Background technology]

[0002] Patent Document 1 discloses a wire harness including a conductive path having a terminal metal fitting fixed to the tip of an electric wire, a corrugated tube surrounding the electric wire, a rubber boot attached to the tip of the corrugated tube and surrounding the electric wire, and an electric wire holder having a holding portion for holding the electric wire and a locking portion for locking onto the circumferential surface of the corrugated tube. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-098010 Summary of the Invention [Problem to be solved by the invention]

[0004] In a wire harness, if water seeps in through gaps between multiple electric wires, it is likely to lead to deterioration of devices connected to the electric wires. It is preferable to be able to prevent water from seeping in through gaps between the electric wires. For example, it is desirable to be able to appropriately prevent water from seeping in through gaps between three or more electric wires.

[0005] An object of the present invention is to provide a waterproofing member that can appropriately prevent water from seeping in through gaps between three or more electric wires. [Means for solving the problem]

[0006] The water-stopping member of the present invention comprises a columnar holder having at least three retaining grooves for holding an electric wire, each of the retaining grooves opening toward the side of the holder and extending from one axial end to the other end of the holder, the retaining groove having an opposing surface facing the outer peripheral surface of the electric wire, the cross-sectional shape of the opposing surface being arc-shaped, and the retaining groove having an arc-shaped rib for sealing between the opposing surface and the outer peripheral surface of the electric wire. [Effects of the Invention]

[0007] The waterproofing member according to the present invention includes a columnar holder having at least three holding grooves for holding electric wires, and the holding grooves are provided with arc-shaped ribs for sealing between the opposing surfaces and the outer peripheral surfaces of the electric wires. The waterproofing member according to the present invention has the effect of appropriately suppressing water seepage through the gaps between three or more electric wires. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a water-stopping member according to an embodiment. [Figure 2] FIG. 2 is a plan view of the water-stopping member according to the embodiment. [Figure 3] FIG. 3 is a plan view of a waterproofing member holding an electric wire. [Figure 4] FIG. 4 is a front view of a waterproof member holding an electric wire. [Figure 5] FIG. 5 is a cross-sectional view of a water-stopping member according to an embodiment. [Figure 6] FIG. 6 is a cross-sectional view of a water-stopping member according to an embodiment. [Figure 7] FIG. 7 is a front view of the water-stopping member attached to the vehicle body. DETAILED DESCRIPTION OF THE INVENTION

[0009] A water-stopping member according to an embodiment of the present invention will be described in detail below with reference to the drawings. Note that the present invention is not limited to the embodiment. Furthermore, the components in the following embodiments include those that can be easily imagined by a person skilled in the art or those that are substantially the same.

[0010] [Embodiment] An embodiment will be described with reference to Figs. 1 to 7. This embodiment relates to a water-stopping member. Fig. 1 is a perspective view of the water-stopping member according to the embodiment, Fig. 2 is a plan view of the water-stopping member according to the embodiment, Fig. 3 is a plan view of the water-stopping member holding an electric wire, Fig. 4 is a front view of the water-stopping member holding an electric wire, Figs. 5 and 6 are cross-sectional views of the water-stopping member according to the embodiment, and Fig. 7 is a front view of the water-stopping member attached to a vehicle body. Fig. 5 shows a VV cross section of Fig. 3. Fig. 6 shows a VI-VI cross section of Fig. 3.

[0011] 1 and 2, a water-stopping member 1 of this embodiment has a columnar holder 2. The water-stopping member 1 is applied to, for example, a wire harness mounted in a vehicle. As an example, the water-stopping member 1 is applied to a harness portion connected to a rear end of an underfloor harness of the vehicle.

[0012] The holder 2 illustrated in the embodiment has a substantially cylindrical shape. The holder 2 is molded from, for example, an elastically deformable resin such as rubber. The holder 2 has at least three holding grooves 3. The illustrated holder 2 has three holding grooves 3. The holding grooves 3 are grooves that hold the electric wires 10 and are arranged on the outer periphery of the holder 2. In this specification, the axial direction of the holder 2 is referred to as the axial direction X. Furthermore, a direction perpendicular to the central axis Cx of the holder 2 and centered on the central axis Cx is referred to as the radial direction, and a direction along the circumference centered on the central axis Cx is referred to as the circumferential direction. The multiple holding grooves 3 are arranged along the circumferential direction.

[0013] The holder 2 has an outer peripheral surface 21, a first end face 2a, and a second end face 2b. The outer peripheral surface 21 is an outer surface of the holder 2 that extends along the axial direction X. The cross-sectional shape of the outer peripheral surface 21 in a plane perpendicular to the axial direction X is circular. The first end face 2a and the second end face 2b are end faces of the holder 2 in the axial direction X. The first end face 2a and the second end face 2b are perpendicular to the axial direction X. The first end face 2a faces a first side X1 in the axial direction X, and the second end face 2b faces a second side X2 in the axial direction X.

[0014] The holding grooves 3 open toward the sides of the holding body 2. That is, each holding groove 3 has an opening 3a that opens to the outer peripheral surface 21 of the holding body 2. The holding grooves 3 extend in the axial direction X from the first end face 2a to the second end face 2b. That is, the holding grooves 3 extend from one end of the holding body 2 in the axial direction X to the other end. The holding grooves 3 open toward a first side X1 in the axial direction X at the first end face 2a. Furthermore, the holding grooves 3 open toward a second side X2 in the axial direction X at the second end face 2b. The openings 3a extend from the first end face 2a to the second end face 2b.

[0015] The holding groove 3 has an opposing surface 31 that faces the outer peripheral surface of the electric wire. The shape of the opposing surface 31 corresponds to the shape of the electric wire to be held. As shown in FIG. 4, the water-stopping member 1 of this embodiment is configured to hold an electric wire 10 having a circular cross section. In this case, the cross-sectional shape of the opposing surface 31 is a shape that can hold the electric wire 10, such as an arc shape. As shown in FIG. 5, in the holding groove 3 of this embodiment, the central angle θ of the opposing surface 31 is greater than 180°.

[0016] As shown in FIGS. 1 and 2, at least one rib 32 is provided in the retaining groove 3. In the illustrated water-stopping member 1, three ribs 32 are arranged in each retaining groove 3. The ribs 32 are arc-shaped. The ribs 32 protrude from the opposing surface 31 toward the central axis of the retaining groove 3. The multiple ribs 32 are arranged at intervals along the axial direction X. The ribs 32 provide a seal between the opposing surface 31 and the outer peripheral surface 10a of the electric wire 10.

[0017] The retaining body 2 has a plurality of protrusions 22. The protrusions 22 protrude radially from the outer peripheral surface 21. The protrusions 22 extend in the circumferential direction from one retaining groove 3 to another retaining groove 3. The plurality of protrusions 22 are aligned in the circumferential direction to form an annular flange. The protrusions 22 have a locking surface 22a facing the first side X1 in the axial direction X. The locking surface 22a can function as a stopper when the retaining body 2 is inserted into the hole portion.

[0018] The holder 2 has a plurality of support pieces 23. The support pieces 23 protrude circumferentially from the edge of the opening 3a of the holding groove 3. The holder 2 has two support pieces 23 for each holding groove 3. A pair of support pieces 23 arranged in one holding groove 3 face each other in the circumferential direction. That is, the pair of support pieces 23 are arranged facing each other so as to narrow the opening width of the opening 3a. The support pieces 23 are arranged so as to face the ribs 32 of the holding groove 3. That is, the support pieces 23 are arranged on extensions of the ribs 32 with respect to both ends of the ribs 32. The support pieces 23 are configured to support the electric wire 10 inserted in the holding groove 3 and press the electric wire 10 toward the ribs 32.

[0019] As shown in Figures 3 and 4, one electric wire 10 is inserted into each holding groove 3. The electric wire 10 is, for example, a coated electric wire having a core wire 11 and an insulating coating 12. An end of the electric wire 10 is connected to, for example, a terminal of a connector or the like. The water-stopping member 1 of this embodiment seals the gaps between the multiple electric wires 10 and can prevent water from seeping in through the gaps between the electric wires 10. Therefore, the water-stopping member 1 of this embodiment can prevent corrosion of connectors and the like due to water seepage.

[0020] The electric wire 10 is inserted into the holding groove 3 from the opening 3a, for example. In this case, the electric wire 10 is inserted into the holding groove 3 while pushing open the opening 3a. The holding groove 3 accommodates the inserted electric wire 10 and holds the electric wire 10.

[0021] 5 shows a VV cross section of FIG. 3. The opening 3a of the holding groove 3 has an opening width Wd. The value of the opening width Wd is smaller than the diameter of the electric wire 10. Therefore, the holding groove 3 can hold the electric wire 10 so that the electric wire 10 does not fall out of the holding groove 3.

[0022] Fig. 6 shows a cross section taken along line VI-VI in Fig. 3. The rib 32 of the holding groove 3 comes into close contact with the outer peripheral surface 10a of the electric wire 10, and seals the gap between the opposing surface 31 and the outer peripheral surface 10a. In Fig. 6, the inner peripheral surface 32i indicated by the dashed line is the inner peripheral surface of the rib 32 before the electric wire 10 is inserted into the holding groove 3. That is, the electric wire 10 is inserted into the holding groove 3 while compressing the rib 32 toward the opposing surface 31. The support piece 23 supports the electric wire 10 so that the electric wire 10 does not lift up from the holding groove 3, and can press the electric wire 10 toward the rib 32. The rib 32 seals the gap between the opposing surface 31 and the outer peripheral surface 10a, and can prevent water from entering.

[0023] 5, the retaining groove 3 of this embodiment is configured so that a gap Gp is ​​formed between the opposing surface 31 and the outer peripheral surface 10a of the electric wire 10. That is, in the portion where the rib 32 is not provided, a clearance exists between the opposing surface 31 and the electric wire 10. This improves the workability when the attachment position of the electric wire 10 is changed after it has been attached to the water-stopping member 1.

[0024] The waterproof member 1 holding the electric wire 10 is fixed to, for example, the body of a vehicle. For example, as shown in FIG. 7 , the water-stopping member 1 is inserted into a through-hole 110 of a vehicle body 100. In this case, the water-stopping member 1 is inserted into the through-hole 110 so as to block the through-hole 110. The water-stopping member 1 may be press-fitted into the through-hole 110. The through-hole 110 may be a hole formed in a metal panel. The water-stopping member 1 blocks the spaces between the multiple electric wires 10, and can prevent water from seeping in from one side of the water-stopping member 1 to the other side in the axial direction X.

[0025] As described above, the waterproof member 1 of this embodiment includes a columnar holder 2 having at least three holding grooves 3 for holding the electric wires 10. Each holding groove 3 opens toward a side of the holder 2 and extends from one end to the other end in the axial direction X of the holder 2. The holding groove 3 has an opposing surface 31 that faces the outer peripheral surface 10a of the electric wire 10. The cross-sectional shape of the opposing surface 31 is arc-shaped. The holding groove 3 is provided with an arc-shaped rib 32 that seals the gap between the opposing surface 31 and the outer peripheral surface 10a of the electric wire 10. The waterproof member 1 of this embodiment can seal the gap between three or more electric wires 10 to prevent water from entering.

[0026] The holder 2 of this embodiment has a support piece 23 that supports the electric wire 10 housed in the holding groove 3. The support piece 23 is disposed so as to face the rib 32, and supports the electric wire 10 so as to press the electric wire 10 toward the rib 32. In other words, the holder 2 holds the electric wire 10 by sandwiching it between the rib 32 and the support piece 23. The support piece 23 can improve the watertightness provided by the rib 32.

[0027] The holding groove 3 in this embodiment has an opening 3a that opens to the outer peripheral surface 21 of the holding body 2. The support piece 23 protrudes in the circumferential direction from the edge of the opening 3a. With this configuration, the electric wire 10 can be firmly held by the support piece 23 in the portion where the rib 32 is provided.

[0028] The number of holding grooves 3 that the holding body 2 has is not limited to three. The holding body 2 may have four or more holding grooves 3. The number of ribs 32 provided in one holding groove 3 is not limited to three. At least one rib 32 is provided in one holding groove 3, and preferably two or more ribs 32 are provided.

[0029] The contents disclosed in the above embodiments can be implemented in appropriate combinations. [Explanation of symbols]

[0030] 1:Water-stopping material 2: Holder, 2a: First end surface, 2b: Second end surface 3: Retention groove, 3a: Opening 10: Electric wire, 10a: Outer surface 11: Core wire, 12: Covering 21: Outer surface, 22: Projection, 22a: Locking surface, 23: Support piece 31: opposing surface, 32: rib, 32i: inner peripheral surface 100: body, 110: through hole Cx: Central axis line Gp: Gap Wd: Opening width X: Axial direction, X1: First side, X2: Second side θ: central angle

Claims

1. a columnar holder having at least three holding grooves for holding electric wires; Each of the retaining grooves is open toward a side of the retaining body and extends from one end to the other end of the retaining body in the axial direction, the holding groove has an opposing surface facing an outer circumferential surface of the electric wire, The cross-sectional shape of the opposing surface is an arc shape, The holding groove is provided with an arc-shaped rib that seals the gap between the opposing surface and the outer circumferential surface of the electric wire. A waterproof member characterized by:

2. the holder has a support piece that supports the electric wire housed in the holding groove, The support piece is disposed so as to face the rib and supports the electric wire so as to press the electric wire toward the rib. The waterproof member according to claim 1 .

3. the holding groove has an opening that opens to the outer circumferential surface of the holding body, The support piece protrudes in the circumferential direction from the edge of the opening. The waterproof member according to claim 2.

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