Grommet and wire harness

Abstract

To provide a grommet and a wire harness in which a work load of winding a tape around a grommet assembled to a wiring material can be lessened.SOLUTION: A grommet 1 includes a winding part 3 that protrudes from one end of a main body part 2 in an axis direction X and is formed to two different directions, and that winds and covers a branch part Wa of a winding material W. The winding part 3 includes a first winding piece 5 extending in a first extension direction C1 along an outer circumferential surface of the branch part Wa, a second winding piece 6 extending in a second extension direction C2 opposite to the first extension direction C1, and a first opening end 8 which is formed in an end in one direction between the two directions of the winding part 3 in the winding state, and from which a first winding material W1 extending from the branch part Wa is derived. The first winding piece 5 has a first cut 11 that is cut from an end of the first winding piece 5 in the first extension direction C1 to the first opening end 8.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a grommet and a wire harness. [Background technology]

[0002] Conventional grommets have been provided that ensure waterproofing of the branching portion of the wiring material and allow easy assembly (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-46616 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional grommets, when the grommet portion through which a wiring material with a small outer diameter to be routed to the branch destination is inserted is wrapped with tape, including the wiring material, the amount of the grommet portion wrapped around the wiring material is greater than that of the wiring material with a large outer diameter to be routed to the branch destination, making the tape wrapping work more difficult and leaving room for improvement in terms of reducing the workload.

[0005] An object of the present invention is to provide a grommet and a wire harness that can reduce the workload of wrapping tape around a grommet assembled to a wiring material. [Means for solving the problem]

[0006] In order to achieve the above object, a grommet according to the present invention includes a main body portion that is fitted into a through hole that penetrates an attachment object along an axial direction to make the through hole waterproof, and through which a wiring material can be inserted along the axial direction; and a rolling portion that protrudes from one end of the main body portion in the axial direction, intersects with the axial direction, is formed in two different directions, and rolls up and covers a branched portion of the wiring material, the rolling portion including a first rolling piece that extends from the end of the main body portion along an outer circumferential surface of the branched portion in a first extending direction, and a second rolling piece that extends from the end of the main body portion along an outer circumferential surface of the branched portion in a second extending direction opposite to the first extending direction, and the second rolling piece is The first winding piece wraps around and covers the branch portion along two extension directions, and in a wound state in which the first winding piece wraps around and covers the branch portion and the second winding piece along the first extension direction, the first winding piece has a first opening end formed at an end of one of the two directions of the winding piece, from which a first wiring material extending from the branch portion in one of the two directions is led out, and a second opening end formed at the other end of the winding piece in the two directions, from which a second wiring material extending from the branch portion in the other of the two directions is led out, and the first winding piece has a first notch portion cut out from the tip of the first winding piece in the first extension direction to the first opening end. [Effects of the Invention]

[0007] The grommet and wire harness according to the present invention have the effect of reducing the workload of wrapping tape around a grommet attached to a wiring material. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a grommet and a wire harness according to an embodiment. [Figure 2] FIG. 2 is a front view of the grommet according to the embodiment. [Figure 3] FIG. 3 is a diagram showing the wiring state of the first opening end side of the grommet on which the first wiring material having an outer diameter R1 is placed. [Figure 4]FIG. 4 is a schematic diagram illustrating an example of a tape-wrapped state on the first opening end side of a grommet to which a first wiring material having an outer diameter R1 is attached. [Figure 5] FIG. 5 is a diagram showing the wiring state of the first opening end side of the grommet on which the first wiring material having an outer diameter R3 is placed. [Figure 6] FIG. 6 is a schematic diagram illustrating an example of a state in which tape is wrapped around the first opening end of a grommet to which a first wiring material having an outer diameter R3 is attached. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the following embodiments. That is, 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, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention.

[0010] [Embodiment] The grommet 1 shown in FIG. 1 is incorporated into a wire harness WH to be routed in a vehicle or the like, and is attached to a mounting panel 100, which is an attachment target provided on the vehicle. The mounting panel 100 is, for example, a metal plate constituting the body of the vehicle, and has a through hole 101. The through hole 101 penetrates the mounting panel 100 in the plate thickness direction. The wire harness WH is, for example, a composite component formed by bundling multiple wiring materials W used for power supply and signal communication to connect various devices mounted on the vehicle, and the multiple wiring materials W are connected to each device using connectors or the like. The wire harness WH includes a conductive wiring material W and a grommet 1 provided on the wiring material W and through which the wiring material W is inserted. The wire harness WH may further include various other components, such as exterior members such as a corrugated tube, a tape member, and a protector, an electrical connection box, and a fixture.

[0011] In the following description, for convenience, of the X, Y, and Z directions shown in FIGS. 1 and 2, the X direction will be referred to as the "axial direction X," the Y direction will be referred to as the "first branching direction Y," and the Z direction will be referred to as the "second branching direction Z." In this embodiment, the axial direction X, the first branching direction Y, and the second branching direction Z intersect with each other. The axial direction X corresponds to the thickness direction of the mounting panel 100 shown in the figure, and corresponds to the insertion direction of the wiring material W and the grommet 1 into the through hole 101. The first branching direction Y and the second branching direction Z intersect with the axial direction X and are not the same direction as each other. Unless otherwise specified, the directions used in the following description will be described as directions in a state in which the grommet 1 is attached to the mounting panel 100.

[0012] The wiring material W is composed of, for example, a bundle of electric wires. The electric wire has a conductor portion (core wire) made of multiple conductive metal wires, the outside of which is covered with an insulating coating portion. The wiring material W is flexible and pliable as a whole. The wiring material W is composed of a main wire WM, a branch portion Wa, a first wiring material W1, and a second wiring material W2.

[0013] The main wire WM is a portion that is routed in one (the lower side in FIG. 1 ) of two spaces that are separated by the mounting panel 100. The two spaces that are separated by the mounting panel 100 are an interior space (e.g., a cabin) and an exterior space (e.g., an engine compartment). The main wire WM is led out toward one of the exterior spaces from an opening (not shown) provided on one side of the axial direction X of the grommet 1. The portion of the main wire WM that is led out from this opening is fixed to the grommet 1 together with a part of the grommet 1 by wrapping a tape member T (not shown).

[0014] The branch portion Wa is a portion where the main line WM branches in two directions, a first branch direction Y and a second branch direction Z, and is housed inside the grommet 1.

[0015] The first wiring material W1 corresponds to a branch wire of the trunk wire WM, and is formed by extending from the branch portion Wa along the first branch direction Y and is routed toward the vehicle interior space. The first wiring material W1 is led out of the grommet 1 from a first opening end 8 provided on one side of the grommet 1 in the first branch direction Y. The portion of the first wiring material W1 led out from the first opening end 8 is wrapped with a tape member T together with a part of the grommet 1 (see Figures 1, 4, and 6). In other words, the first wiring material W1 is fixed to the grommet 1 by wrapping the tape member T from the first wiring material W1 to the grommet 1 along both sides of the first branch direction Y around the first opening end 8. The first wiring material W1 in this embodiment has an outer diameter R1. The outer diameter R1 is, for example, relatively smaller than the outer diameter of the trunk wire WM.

[0016] The second wiring material W2 corresponds to a branch wire of the main wire WM, and is formed by extending from the branch portion Wa along the second branch direction Z and is wired toward the vehicle interior space. The second wiring material W2 is led out of the grommet 1 from a second opening end 9 provided on one side of the grommet 1 in the second branch direction Z. The portion of the second wiring material W2 led out from the second opening end 9 is wrapped with a tape member T together with a part of the grommet 1 (see FIG. 1). In other words, the second wiring material W2 is fixed to the grommet 1 by winding the tape member T from the second wiring material W2 to the grommet 1 along both sides of the second branch direction Z around the second opening end 9. The second wiring material W2 in this embodiment has an outer diameter R2. This outer diameter R2 is, for example, relatively smaller than the outer diameter of the main wire WM and relatively larger than the outer diameter R1 of the first wiring material W1 (R2>R1).

[0017] The grommet 1 is applied to a through hole 101 of the mounting panel 100 when routing a wiring material W across the interior and exterior spaces of the vehicle, with the mounting panel 100 as the boundary. The grommet 1 is attached to the through hole 101 with the wiring material W of the wire harness WH inserted therethrough and sheathed around the wiring material W, thereby protecting the wiring material W passing through the through hole 101 and waterproofing the through hole 101. In addition to waterproofing the through hole 101, the grommet 1 also has functions such as dustproofing and sound insulation between the interior and exterior spaces of the vehicle.

[0018] 2, grommet 1 includes a main body 2 and a roll-up portion 3, which are integrally formed as an elastic body. Grommet 1 is made of an insulating elastic resin material with low rigidity and high flexibility, such as rubber or a thermoplastic elastomer (e.g., ethylene-propylene-diene rubber (EPDM)).

[0019] The main body 2 is fitted into a through hole 101 that penetrates the mounting panel 100 along the axial direction X to make the through hole 101 waterproof, and is a portion through which the main wire WM is inserted along the axial direction X. The main body 2 has a winding portion 3 formed on one end 2a side in the axial direction X. The main body 2 is formed in a substantially cylindrical shape around a central axis that extends along the axial direction X, and has a through hole 2b therein through which the main wire WM is inserted. The through hole 2b penetrates from one side to the other in the axial direction X.

[0020] The winding portion 3 protrudes from one end of the main body 2 in the axial direction X, intersects the axial direction X, and is formed in two different directions to wind and cover the branch portion Wa of the wiring material W. These two directions are, for example, a first branching direction Y and a second branching direction Z. The winding portion 3 has a first winding piece 5, a second winding piece 6, a slit 7, a first opening end 8, and a second opening end 9.

[0021] The first winding piece 5 is a portion that extends in a first extension direction C1 from the end portion 2a of the main body portion 2 along the outer peripheral surface of the branch portion Wa of the wiring material W (see FIGS. 3 to 6). Since the first branching direction Y and the second branching direction Z intersect in the first winding piece 5 in this embodiment, unlike when the first branching direction Y and the second branching direction Z are the same direction, the first winding piece 5 is made up of a portion 5A that extends from the center portion P1 of the first winding piece 5 toward the first branching direction Y and a portion 5B that extends toward the second branching direction Z.

[0022] Therefore, in the portion 5A of the first winding piece 5, the first extension direction C1 is, for example, one of the circumferential directions about the central axis along the first branching direction Y, and is the direction from the main body 2 to the tip 5a of the first winding piece 5. On the other hand, in the portion 5B of the first winding piece 5, the first extension direction C1 is, for example, one of the circumferential directions about the central axis along the second branching direction Z, and is the direction from the main body 2 to the tip 5a of the first winding piece 5. The first winding piece 5 is formed integrally with the main body 2 and the second winding piece 6. The shape of the first winding piece 5 when viewed from the first branching direction Y of the portion 5A is formed to be arc-shaped, and the shape of the first winding piece 5 when viewed from the second branching direction Z of the portion 5B is formed to be arc-shaped.

[0023] As shown in FIGS. 1 to 6, the first winding piece 5 of this embodiment has a first cutout 11. The first cutout 11 is cut out from the tip 5a of the first winding piece 5 in the first extension direction C1 to the first opening end 8. The first cutout 11 is formed in a substantially linear shape from the tip 5a to the first opening end 8, but is not limited to this. Furthermore, it is preferable that the angle formed between the first cutout 11 and the tip 5a exceeds approximately 90 degrees, and that the angle formed between the first cutout 11 and the first opening end 8 also exceeds approximately 90 degrees.

[0024] The second winding piece 6 is a portion that extends from the end portion 2a of the main body portion 2 along the outer peripheral surface of the branch portion Wa of the wiring material W in a second extending direction C2 opposite to the first extending direction C1 (see FIGS. 3 to 6). Similar to the above-described first winding piece 5, the second winding piece 6 of this embodiment is composed of a portion 6A that extends from the center portion P2 of the second winding piece 6 toward the first branching direction Y and a portion 6B that extends toward the second branching direction Z.

[0025] Therefore, in the portion 6A of the second winding piece 6, the second extension direction C2 is, for example, the other circumferential direction around the central axis along the first branching direction Y, and is the direction from the main body 2 to the tip 6a of the second winding piece 6. On the other hand, in the portion 6B of the second winding piece 6, the second extension direction C2 is, for example, the other circumferential direction around the central axis along the second branching direction Z, and is the direction from the main body 2 to the tip 6a of the second winding piece 6. In the second winding piece 6, the shape of the portion 6A when viewed from the first branching direction Y is formed in an arc shape, and the shape of the portion 6B when viewed from the second branching direction Z is also formed in an arc shape.

[0026] As shown in FIGS. 1 to 6 , the second winding piece 6 of this embodiment has a second cutout 12. The second cutout 12 is cut out from the tip 6a of the second winding piece 6 in the second extension direction C2 to the first opening end 8. The second cutout 12 is not formed in a substantially linear shape from the tip 6a to the first opening end 8, but this is not limited to this. The second cutout 12 is composed of a first portion 12a and a second portion 12b. The first portion 12a and the second portion 12b are each formed in a substantially linear shape to form a step. The angle between the first portion 12a and the first opening end 8 is substantially 90 degrees. The angle between the second portion 12b and the tip 6a is greater than substantially 90 degrees. The second cutout 12 of this embodiment is relatively larger than the first cutout 11 described above.

[0027] The first winding piece 5 and the second winding piece 6 are continuous with each other in the portions that protrude from the main body 2 in the first branching direction Y and the second branching direction Z, forming a generally gutter-shaped portion as a whole. Portion 5A of the first winding piece 5 and portion 6A of the second winding piece 6 are portions that protrude in the first branching direction Y, and these are continuous in the circumferential direction of the first wiring material W1 to form the first branching direction Y side of the generally gutter-shaped portion. Portion 5B of the first winding piece 5 and portion 6B of the second winding piece 6 are portions that protrude in the second branching direction Z, and these are continuous in the circumferential direction of the second wiring material W2 to form the second branching direction Z side of the generally gutter-shaped portion. One end of the generally gutter-shaped portion where the first winding piece 5 and the second winding piece 6 are continuous forms a first opening end 8, and the other end forms a second opening end 9.

[0028] As shown in FIGS. 1 and 2, the slit 7 is formed from the first opening end 8 to the second opening end 9 and is located between the tip 5a of the first winding piece 5 and the tip 5a of the second winding piece 6. The slit 7 is formed so as to be openable and closable by the elastic deformation of the first winding piece 5 and the second winding piece 6, respectively. As shown in FIGS. 2 and 3 (including FIG. 5), the slit 7 is in an open state when the winding portion 3 winds around but does not cover the branch portion Wa of the wiring material W, a portion of the first wiring material W1, and a portion of the second wiring material W2. In other words, in this open state, the winding portion 3, as described above, has a generally gutter-like shape as a whole, with the first winding piece 5 and the second winding piece 6 continuing together. When the slit 7 is in the open state, the first wiring material W1, the second wiring material W2, and the branch portion Wa of the wiring material W can be passed through. On the other hand, as shown in Fig. 4 (including Fig. 6), for example, the slit 7 is in a closed state when the second winding piece 6 winds around and covers the branch portion Wa along the second extending direction C2, and the first winding piece 5 winds around and covers the branch portion Wa and the second winding piece 6 along the first extending direction C1. In the above-mentioned wound and closed states, the slit 7 closes the through hole 2b provided in the main body 2 and through which the trunk line WM is inserted. One tip 5a constituting the slit 7 is positioned apart from the other tip 6a in the axial direction X when the slit 7 is in an open state.

[0029] The first opening end 8 is formed at the end of one (first branching direction Y) of the two directions (first branching direction Y, second branching direction Z) of the winding section 3 in the above-mentioned winding state, and is the portion from which the first wiring material W1 extending in the first branching direction Y, which is one of the two directions, is led out from the branching section Wa of the wiring material W. As shown in Figure 3 (including Figure 5), the first opening end 8 is formed into a roughly C-shape when viewed from the first branching direction Y when the slit 7 is in an open state. On the other hand, as shown in Figure 4 (including Figure 6), the first opening end 8 is formed into a roughly annular shape when viewed from the first branching direction Y when the slit 7 is in a closed state.

[0030] The second opening end 9 is formed at the end of the other of the two directions (second branch direction Z) of the winding section 3 in the above-mentioned winding state, and is the portion from which the second wiring material W2 extending in the second branch direction Z, which is the other of the two directions, is led out from the branch section Wa of the wiring material W. Although not shown, the second opening end 9 has a substantially C-shaped shape when viewed from the second branch direction Z when the slit 7 is in an open state. On the other hand, although not shown, the second opening end 9 has a substantially annular shape when viewed from the second branch direction Z when the slit 7 is in a closed state.

[0031] Next, a brief description will be given of the assembly work of the wire harness WH of this embodiment. First, an assembly worker inserts the main wire WM of the wiring material W through the through-hole b of the main body 2, and then stores the branch portion Wa of the wiring material W, together with a portion of the first wiring material W1 and a portion of the second wiring material W2, in the winding section 3 through the slit 7. Next, the assembly worker wraps the second winding piece 6 around the branch portion Wa along the second extension direction C2 to cover it, and then wraps the first winding piece 5 around the branch portion Wa and the second winding piece 6 along the first extension direction C1 to cover them, thereby achieving a wound state. Furthermore, while maintaining the wound state, the assembly worker, for example, wraps the first opening end 8 with tape T, and then wraps the second opening end 9 with tape T.

[0032] The problems with conventional grommets will be briefly explained. For example, when the first wiring material W1 has a relatively small outer diameter, the workload of the assembly worker performing the above-described assembly work may increase compared to when a first wiring material with a relatively large outer diameter is used. That is, the amount of winding of the first winding piece and the second winding piece for a first wiring material with a small outer diameter is relatively greater than that for a first wiring material with a large outer diameter. Therefore, the assembly worker must carefully wind the tape while holding down the winding portion so as not to create gaps between the outer surface of the first wiring material W1 and the first winding piece and the second winding piece, which may increase the mental burden of the work.

[0033] Therefore, in the grommet 1 and the wire harness WH of this embodiment, the first winding piece 5 has a first cutout portion 11 cut out from the tip of the first winding piece 5 in the first extension direction C1 to the first opening end 8. In other words, in the grommet 1 and the wire harness WH, the amount of winding of the first winding piece 5 into the first wiring material W1 near the first opening end 8 is relatively smaller than in the conventional products due to the first cutout portion 11. As a result, even if the assembly worker performs the tape winding work while holding down the winding portion 3, the worker does not have to be as careful as in the conventional products, and the mental burden is reduced.

[0034] Furthermore, in the grommet 1 and the wire harness WH of this embodiment, the second winding piece 6 has a second cutout portion 12 cut out from the tip of the second winding piece 6 in the second extension direction C2 to the first opening end 8. In other words, in the grommet 1 and the wire harness WH, the amount of winding of the second winding piece 6 into the first wiring material W1 near the first opening end 8 is relatively smaller than in the conventional products due to the second cutout portion 12. As a result, even if the assembly worker performs the tape winding work while holding down the winding portion 3, the worker needs to be less careful than in the conventional products, and the mental burden is reduced.

[0035] As described above, the grommet 1 and the wire harness WH according to this embodiment include a retracting portion 3 that protrudes from one end of the main body 2 in the axial direction X, is formed in two different directions, and retracts and covers the branch portion Wa of the wiring material W. The retracting portion 3 includes a first retracting piece 5 that extends in a first extension direction C1 along the outer peripheral surface of the branch portion Wa, a second retracting piece 6 that extends in a second extension direction C2 opposite to the first extension direction C1, and a first opening end 8 that is formed at one end of the retracting portion 3 in one of the two directions and from which the first wiring material W1 extending from the branch portion Wa is led out in a retracted state. The first retracting piece 5 has a first notch 11 that is cut out from the tip of the first retracting piece 5 in the first extension direction C1 to the first opening end 8.

[0036] In the grommet 1 and wire harness WH of this embodiment, compared to conventional ones not provided with the first notch 11, the first notch 11 makes it possible to relatively reduce the amount of winding of the first winding piece 5 around the first wiring material W1 near the first opening end 8. As a result, with the grommet 1 and wire harness WH, even if an assembly worker performs tape winding work while holding down the winding portion 3, the worker needs to be less careful than with conventional products, reducing the mental burden and, as a result, reducing the workload of winding tape around the grommet 1 assembled to the wiring material W.

[0037] In addition, conventional grommets ensure the soundproofing properties of the grommet 1 attached to the mounting panel 100 by making the first winding piece relatively larger than the second winding piece and by having the first winding piece wrap around and cover the branch section Wa so as to block the through hole 2b through which the main line WM is inserted.In this case, however, it is necessary for the outer diameter R1 of the first wiring material W1 and the outer diameter R2 of the second wiring material W2 to be approximately the same. In other words, in conventional grommets, for example, if the outer diameter R1 of the first wiring material W1 is relatively smaller than the outer diameter R2 of the second wiring material W2, even if the branch section Wa is wrapped and covered with the first winding piece, the gaps that occur between the outer surface of the first wiring material W1 and the inner surface of the first winding piece 5 and the inner surface of the second winding piece 6 will be larger than the gaps that occur between the outer surface of the second wiring material W2 and the inner surface of the first winding piece 5 and the inner surface of the second winding piece 6, and therefore there is a risk that the soundproofing properties of the grommet 1 cannot be guaranteed.

[0038] Therefore, in the grommet 1 and wire harness WH of this embodiment, by providing the first notch 11 in the first winding piece 5, the amount of winding of the first winding piece 5 with respect to the first wiring material W1 near the first opening end 8 is relatively smaller than in conventional products, and it is possible to reduce the overall gaps that occur between the outer surface of the first wiring material W1 and the inner surface of the first winding piece 5 and the inner surface of the second winding piece 6. As a result, the grommet 1 and wire harness WH can maintain sound insulation similar to conventional grommets even when the outer diameter R1 of the first wiring material W1 is relatively smaller than the outer diameter R2 of the second wiring material W2.

[0039] Furthermore, the grommet 1 and the wire harness WH have a second cutout portion 12 formed by cutting the second winding piece 6 from the tip of the second winding piece 6 in the second extension direction C2 to the first opening end 8. This makes it possible to reduce the amount of overlap in the radial direction of the first wiring material W1 between the end 5b of the first winding piece 5 on the first opening end 8 side and the end 6b of the second winding piece 6 on the first opening end 8 side, further improving the workability of tape winding.

[0040] Furthermore, since the second notch 12 of the grommet 1 and the wire harness WH is relatively large compared to the first notch 11, the above-mentioned effect can be obtained even if the outer diameter R1 of the first wiring material W1 is as small as possible.

[0041] In the above embodiment, the first wiring material W1 has been described as having an outer diameter R1 smaller than the outer diameter R2 of the second wiring material, but this is not limited to this. Figure 5 is a diagram showing the wiring state of the first opening end side of a grommet on which a first wiring material with an outer diameter R3 is placed. Figure 6 is a schematic diagram showing an example of the tape wrapping state of the first opening end side of a grommet to which a first wiring material with an outer diameter R3 is attached.

[0042] The outer diameter R3 of the first wiring material W1A shown in Figures 5 and 6 is relatively larger than the outer diameter R1. Preferably, this outer diameter R3 is smaller than the outer diameter of the trunk wire WM and approximately the same as the outer diameter R2 of the second wiring material W2. Because the first winding piece 5 of the grommet 1 and the wire harness WH has the first notch 11, the amount of winding of the first winding piece 5 around the first wiring material W1A near the first opening end 8 is relatively smaller than in conventional grommets. However, the portion of the first winding piece 5 other than the first notch 11 winds around the first wiring material W1A and covers the branch portion Wa, as in conventional grommets. This reduces the workload of wrapping tape around the grommet 1 assembled to the wiring material W and ensures the sound insulation of the grommet 1.

[0043] In the above embodiment, the first branching direction Y and the second branching direction Z intersect with the axial direction X and are not in the same direction, but this is not limiting. For example, the first branching direction Y and the second branching direction Z may be in the same direction.

[0044] Furthermore, in the above embodiment, the first notch 11 is formed in the first winding piece 5 and the second notch 12 is formed in the second winding piece 6, but this is not limited to this, and the second notch 12 may not be formed in the second winding piece 6, and the first notch 11 may be formed only in the first winding piece 5.

[0045] Furthermore, in the above embodiment, the first notch 11 and the second notch 12 are both formed on the first opening end 8 side, but this is not limited to this, and they may be formed on both the first opening end 8 side and the second opening end 9 side. [Explanation of symbols]

[0046] 1 grommet 2 Main body 3. Winding section 5 First wrapping piece 6 Second wrapping piece 7 Slit 8 1st open end 9 2nd open end 11 First notch 12 Second notch 100 Mounting Panel 101 Through hole WH Wire Harness W Routing material Wa branch W1 1st wiring material W2 2nd wiring material

Claims

1. a main body portion that is fitted into a through hole that penetrates an attachment object along an axial direction to waterproof the through hole and through which a wiring material can be inserted along the axial direction; A winding portion that protrudes from one end of the main body portion in the axial direction, intersects with the axial direction, and is formed in two different directions, and winds and covers the branch portion of the wiring material, The rolled portion is a first winding piece extending from the end of the main body portion along an outer circumferential surface of the branch portion in a first extending direction; a second winding piece extending from the end of the main body portion along an outer circumferential surface of the branch portion in a second extending direction opposite to the first extending direction; a first opening end formed at an end of the winding portion in one of the two directions, from which a first wiring material extending from the branch portion in one of the two directions is led out, in a winding state in which the second winding piece winds around and covers the branch portion along the second extension direction, and the first winding piece winds around and covers the branch portion and the second winding piece along the first extension direction; a second opening end formed at an end of the winding portion in the other of the two directions, from which a second wiring material extending from the branch portion in the other of the two directions is led out in the winding state; The first winding piece is a first notch portion that is cut out from the tip of the first winding piece in the first extending direction to the first opening end; A grommet characterized by:

2. The second winding piece is a second notch portion that is cut out from a tip end of the second winding piece in the second extension direction to the first opening end, The second cutout portion is Relatively large compared to the first notch The grommet of claim 1 .

3. A conductive wiring material; A grommet provided on the wiring material, The grommet is a main body portion that is fitted into a through hole that penetrates an attachment object along an axial direction to waterproof the through hole and through which the wiring material can be inserted along the axial direction; A winding portion that protrudes from one end of the main body portion in the axial direction, intersects with the axial direction, and is formed in two different directions, and winds and covers the branch portion of the wiring material, The rolled portion is a first winding piece extending from the end of the main body portion along an outer circumferential surface of the branch portion in a first extending direction; a second winding piece extending from the end of the main body portion along an outer circumferential surface of the branch portion in a second extending direction opposite to the first extending direction; a first opening end formed at an end of the winding portion in one of the two directions, from which a first wiring material extending from the branch portion in one of the two directions is led out, in a winding state in which the second winding piece winds around and covers the branch portion along the second extension direction, and the first winding piece winds around and covers the branch portion and the second winding piece along the first extension direction; a second opening end formed at the other end of the winding portion in the other of the two directions in the winding state, through which a second wiring material extending from the branch portion in the other of the two directions is led out; The first winding piece is a first notch portion that is cut out from the tip of the first winding piece in the first extending direction to the first opening end; A wire harness characterized by:

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