JP2022144999A - Grommet assembly and wire harness - Google Patents

Abstract

To improve a sound insulating properties of a grommet assembly.SOLUTION: A grommet assembly is provided which is attached to a panel in which a through-hole is provided, and protects an electric wire passing through the through-hole, the grommet assembly comprises: a first grommet having a first cover portion covering the through-hole from a first surface side of the panel and a first insertion portion into which the electric wire passes; and a second grommet having a second cover portion covering the through-hole from the second surface side of the panel and a second insertion portion into which the electric wire passes. The first grommet includes: a cylindrical wall portion that is connected to the first cover portion and penetrates the through-hole; an annular sealing portion that is provided in the outside in a radial direction, of the cylindrical wall portion, and comes in contact with the panel; a bracket portion that is provided in the outside in a radial direction, of the cylindrical wall portion and nips the panel between the sealing portion and the bracket portion; and an annular first coupling portion that is connected to the cylindrical wall portion and is coupled to the second grommet.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to grommet assemblies and wire harnesses.

For example, when wires are wired through a panel (vehicle panel) that separates the inside and outside of an automobile, a through hole is provided in the panel, and a grommet is attached to the through hole (for example, See Patent Document 1). The grommet is made of rubber, for example, and protects the wires passing through the through hole of the panel.

JP 2020-162359 A

The grommet disclosed in Patent Literature 1 has an annular main body portion attached to a through hole of a panel, and a cylindrical insertion portion provided integrally with the main body portion. An electric wire is wired through the panel by passing through the insertion portion.

Here, in the case of automobiles, in order to improve the quietness of the interior of the vehicle, it is required to make it difficult for road noise or sound generated in the engine room to be transmitted into the interior of the vehicle. A conventional grommet covers a through-hole of a panel from one side of the panel, but does not cover the other side of the panel, and the through-hole opens toward the vehicle interior. Therefore, there is a problem that the conventional grommet has low sound insulation.

Therefore, an object of the present disclosure is to provide a grommet assembly capable of improving sound insulation, and a wire harness including the grommet assembly.

A grommet assembly according to one aspect of the present disclosure is a grommet assembly that is attached to a panel provided with a through hole and protects an electric wire passing through the through hole,
A first cover portion covering the through hole from the first surface side of the panel and a first grommet having a first insertion portion through which the electric wire passes, and a second cover portion covering the through hole from the second surface side of the panel. and a second grommet having a second insertion portion through which the electric wire passes,
The first grommet includes a cylindrical wall portion connected to the first cover portion and penetrating the through hole, an annular seal portion provided radially outside the cylindrical wall portion and in contact with the panel, A bracket portion that is provided radially outward of the cylindrical wall portion and sandwiches the panel between itself and the seal portion, and an annular first connecting portion connected to the cylindrical wall portion and connected to the second grommet. and have

A wire harness according to an aspect of the present disclosure includes an electric wire passing through a through hole provided in a panel, and the grommet assembly attached to the panel and protecting the electric wire.

According to the present disclosure, the sound isolation of the grommet assembly is improved.

FIG. 1 is a schematic explanatory diagram of a wire harness according to an embodiment. 2 is a perspective view of the grommet assembly; FIG. 3 is an exploded perspective view of the grommet assembly; FIG. FIG. 4 is a cross-sectional view of the grommet assembly; FIG. 5 is an enlarged cross-sectional view showing a cylindrical wall and its surroundings. FIG. 6 is an exploded perspective view of the first grommet. FIG. 7 is a perspective view of the grommet assembly in a disassembled state as seen from the second insertion portion side. FIG. 8 is a perspective view of a second grommet. FIG. 9 is a cross-sectional view showing a modification of the first connecting portion and the second connecting portion. FIG. 10 is a cross-sectional view showing another modification of the first connecting portion and the second connecting portion.

<Outline of Embodiment of Present Disclosure>
An outline of the embodiments of the present disclosure will be listed and described below.
(1) A grommet assembly according to an embodiment is a grommet assembly that is attached to a panel provided with a through hole and protects an electric wire passing through the through hole,
A first cover portion covering the through hole from the first surface side of the panel and a first grommet having a first insertion portion through which the electric wire passes, and a second cover portion covering the through hole from the second surface side of the panel. and a second grommet having a second insertion portion through which the electric wire passes,
The first grommet includes a cylindrical wall portion connected to the first cover portion and penetrating the through hole, an annular seal portion provided radially outside the cylindrical wall portion and in contact with the panel, A bracket portion that is provided radially outward of the cylindrical wall portion and sandwiches the panel between itself and the seal portion, and an annular first connecting portion connected to the cylindrical wall portion and connected to the second grommet. and have

According to the grommet assembly of the above embodiment, the first cover portion of the first grommet covers the through hole from the first surface side of the panel, and the second cover portion of the second grommet covers the through hole from the second surface side of the panel. cover from By connecting the first grommet and the second grommet by the first connecting portion, the internal space formed between the first grommet and the second grommet becomes a closed space. Therefore, the sound insulation is improved compared to the conventional grommet in which one side of the through hole of the panel is open.

(2) Preferably, the first cover portion has a tubular extension wall portion connected to the tubular wall portion, and a lid portion that closes the tubular extension wall portion, and has a bottom. It has a cylindrical shape.
In this case, the first grommet has a dome shape, the internal space is expanded, and the sound insulation is further improved.

(3) Further, preferably, the first insertion portion has a first hole through which the electric wire is drawn out in a direction along the first surface of the panel.
In this case, the size of the first grommet is reduced in the direction perpendicular to the panel. It is possible to wire the electric wire drawn out from the first insertion portion along the first surface of the panel.

(4) In the grommet assembly described in (3) above, preferably, the first cover portion has an internal space formed between the first grommet and the second grommet through the first insertion portion. a guide portion having an inclined surface that guides the electric wire positioned at the second cover portion toward the second cover portion.
In this case, the electric wire passing through the first insertion portion and positioned in the internal space of the grommet assembly is guided toward the second cover portion by the guide portion. Therefore, the workability of wiring is improved when the wires are passed through the first grommet and the second grommet.

(5) Further, preferably, the second insertion portion has a second hole through which the electric wire is drawn out in a direction along the second surface of the panel.
In this case, the size of the second grommet is reduced in the direction perpendicular to the panel. It is possible to wire the electric wire drawn out from the second insertion portion along the second surface of the panel.

(6) Further, preferably, the first grommet has a projection on a portion along the circumferential direction of the cylindrical wall portion, and the second grommet has a recess into which the projection fits.
In this case, the first grommet and the second grommet are positioned by fitting the projection into the recess, which facilitates assembly. After assembly, the first grommet and the second grommet are prevented from turning by fitting the projection and the recess.

(7) Further, preferably, the cylindrical wall portion has a groove formed along the circumferential direction, and the first grommet is a separate member from the cylindrical wall portion and the It has a circumferential member that fits into the groove, and the circumferential member has the bracket portion.
In this case, the first grommet has a bracket portion by attaching the circumferential member to the concave groove of the cylindrical wall portion. The grommet assembly is attached to the panel by sandwiching the panel between the bracket portion and the seal portion. In the attached state, the force acting on the bracket portion from the panel is transmitted to the tubular wall portion through the circumferential member fitted in the recessed groove. Therefore, the mounting force of the grommet assembly to the panel by the bracket portion is improved.

(8) Also, preferably, the seal portion contacts the second surface of the panel, and the bracket portion contacts the first surface of the panel.
In this case, in an environment where water falls on the grommet assembly from the second surface side of the panel, it is difficult for the water to reach the first surface side.

(9) Further, preferably, the first connecting portion is provided radially inside the tubular wall portion.
In this case, the first connecting portion is provided radially inward of the seal portion, and is further provided radially inward of the cylindrical wall portion. Foreign matter such as water is less likely to enter the internal space of the grommet assembly from between the first connecting portion and the second grommet.

(10) Further, preferably, the second grommet has an annular second connecting portion that is connected to the second cover portion and connected to the first connecting portion, and the first connecting portion is the tubular has an inner annular portion that extends radially inward from the wall portion of the second connecting portion, and the second connecting portion has a recessed circumferential groove that fits in close contact with the inner peripheral portion of the inner annular portion.
Since the inner peripheral portion of the inner annular portion of the first connecting portion and the recessed circumferential groove of the second connecting portion are closely fitted, the airtightness of the internal space of the grommet assembly is improved, further improving sound insulation. do.

(11) In the grommet assembly described in (10) above, more preferably, the second connecting portion is provided so as to be connected to the second cover portion, and is provided in line with the inner annular portion in the axial direction. a second annular portion that is in contact with the inner annular portion; an inner tubular portion that extends axially from the second annular portion and is positioned radially inward of the inner annular portion; and an annular engaging portion provided between the inner annular portion and the second annular portion, the engaging portion being formed between the second annular portion, the inner cylindrical portion, and the engaging portion. The space is the recessed circumferential groove.
With this configuration, it is possible to easily obtain a configuration in which the inner peripheral portion of the inner annular portion of the first connecting portion is tightly fitted into the concave circumferential groove of the second connecting portion.

(12) In the grommet assembly described in (11) above, preferably, the first grommet is positioned above the second grommet, and the inner cylindrical portion It is provided so as to extend axially from the second annular portion toward the side of the first cover portion positioned above, and is located radially inside the inner annular portion.
In this case, even in an environment where water splashes from around the underlying second grommet, it becomes difficult for water to enter the internal space of the grommet assembly through the space between the first connecting portion and the second connecting portion.

(13) In the grommet assembly described in (11) or (12), more preferably, the inner annular portion has an axially protruding pawl portion on an inner peripheral portion of the inner annular portion, and the The engaging portion has an outer cylindrical portion positioned radially outwardly of the claw portion.
In this case, even if a part of the inner annular portion of the first connecting portion is displaced radially outward and tries to come out of the concave circumferential groove of the second connecting portion, the claw portion of the inner annular portion part of the inner annular portion is difficult to come off from the recessed circumferential groove. That is, the above configuration improves the strength of connection between the first grommet and the second grommet.

(14) In the grommet assembly described in (13) above, when the first connecting portion of the first grommet and the second connecting portion of the second grommet are connected, the claw portion on the first connecting portion side When the outer cylindrical portion on the outer side is pushed from the radially outer side toward the inner side, the claw portion crosses the outer cylindrical portion with elastic deformation, and the claw portion is fitted to the radially inner side of the outer cylindrical portion. Therefore, preferably, the claw portion has a first inclined surface on the radially inner side of the claw portion that is inclined radially outward toward the projecting direction of the claw portion. According to this configuration, when connecting the first grommet and the second grommet, the claw portion can easily pass over the outer cylindrical portion, and the assembling workability of the first grommet and the second grommet is improved.

(15) In the grommet assembly described in (13) or (14), more preferably, the outer cylindrical portion is arranged radially outward of the outer cylindrical portion and radially inward toward the second annular portion. has a second inclined surface inclined to
In this case, when connecting the first grommet and the second grommet, the claw portion can easily pass over the outer cylindrical portion, and the assembling workability of the first grommet and the second grommet is improved.

(16) In the grommet assembly described in (14) above, when connecting the first grommet and the second grommet, it is more preferable to The first inclined surface has a rough surface for reducing the contact area with the outer cylinder. According to this rough surface, the frictional resistance between the claw portion and the outer cylinder portion is reduced compared to the case where the first inclined surface is a smooth surface. As a result, the claw portion can easily pass over the outer cylindrical portion, and the assembling workability of the first grommet and the second grommet is improved.

(17) In the grommet assembly described in (15) above, more preferably, the second inclined surface has a rough surface for reducing a contact area with the claw portion. According to this rough surface, the frictional resistance between the claw portion and the outer cylinder portion is reduced as compared with the case where the second inclined surface is a smooth surface. As a result, the claw portion can easily pass over the outer cylindrical portion, and the assembling workability of the first grommet and the second grommet is improved.

(18) Further, preferably, the second insertion portion has a plurality of second holes through which a plurality of the electric wires are passed, and the second grommet has a wiring region in the second grommet that is preferably the plurality of the second holes. A partition wall defines a plurality of separate areas for each of the plurality of wires passing through the two holes.
In this case, it is possible to prevent the wires from passing through the wrong second hole due to the crossing of the wires in the wiring area of the second grommet.

(19) A wire harness according to the present embodiment is a wire harness including electric wires passing through through-holes provided in a panel, and a grommet assembly attached to the panel and protecting the electric wires, wherein the grommet assembly is , the grommet assembly according to any one of (1) to (18) above.
According to the wire harness of this embodiment, in the grommet assembly, the sound insulation is improved as compared with the conventional grommet in which one side of the through hole of the panel is open.

<Details of the embodiment of the present disclosure>
Hereinafter, details of embodiments of the present disclosure will be described with reference to the drawings. At least part of the embodiments described below may be combined arbitrarily.

[About wire harness]
A wire harness according to an embodiment will be described. A wire harness is used to electrically connect a plurality of electric devices. FIG. 1 is a schematic explanatory diagram of a wire harness 7 according to this embodiment. A wire harness 7 shown in FIG. 1 is a high-voltage wire harness for use in a vehicle such as an electric vehicle or a hybrid vehicle. Examples of the electrical equipment include a battery and an inverter mounted on a vehicle. For example, the first electric device 8 is installed in the cabin side (inside the vehicle) area, and the second electric device 9 is installed in the engine room outside the cabin. The inside and outside of the vehicle are separated by a plate-shaped panel P, and the wire harness 7 is wired through a through hole Q provided through the panel P. As shown in FIG.

The wire harness 7 includes one or more electric wires 6 passing through the through holes Q and a grommet assembly 10 for protecting the electric wires 6 . The grommet assembly 10 is attached to the formation of the through hole Q of the panel P. As shown in FIG. 2 is a perspective view of grommet assembly 10. FIG. 3 is an exploded perspective view of grommet assembly 10. FIG. 4 is a cross-sectional view of grommet assembly 10. FIG. In each figure, the panel P and the electric wire 6 are indicated by imaginary lines (double-dot chain lines). The wire harness 7 of this embodiment has a plurality of (three in the figure) electric wires 6 . Note that the number of electric wires 6 is arbitrary.

A "direction" in the grommet assembly 10 is defined.
A direction orthogonal to the first surface P1 of the panel P is defined as an "axial direction". In addition, the plate|board thickness of the panel P is constant in the formation part of the through-hole Q, and the 1st surface P1 of the panel P and the 2nd surface P2 which is the surface opposite to it are parallel. The direction along the center line L of the through-hole Q and the thickness direction of the panel P are aligned with the axial direction.
A direction facing outward from the center (center line L) of the through hole Q is defined as a “radial direction”. A direction orthogonal to the axial direction is included in the “radial direction”.
With the grommet assembly 10 attached to the panel P, the axial and radial directions for the grommet assembly 10 are as defined above. A state in which the grommet assembly 10 is attached to the panel P is called an "attached state."

[About the grommet assembly 10]
Grommet assembly 10 has a two-piece construction (see FIG. 3). The grommet assembly 10 includes a first grommet 11 and a second grommet 51 that is separate from the first grommet 11 . The first grommet 11 and the second grommet 51 are made of rubber and can be elastically deformed, for example, ethylene-propylene-diene rubber (EPDM). Note that the later-described circumferential member 16 included in the first grommet 11 may be made of a material different from that of the main body 11a of the first grommet 11. For example, the material is harder than the main body 11a, such as polypropylene (PP). is.

A space formed between the first grommet 11 and the second grommet 51 in a state where the first grommet 11 and the second grommet 51 are connected (see FIG. 4) is called an "internal space K". In this embodiment, the first grommet 11 is positioned on the vehicle inner side of the panel P, and the second grommet 51 is positioned on the vehicle outer side of the panel P.

The first grommet 11 has a first cover portion 12 and a first insertion portion 13 through which the electric wire 6 passes. The first grommet 11 further has a tubular wall portion 14 , an annular sealing portion 15 , a bracket portion 18 , and an annular first connecting portion 19 for connecting with the second grommet 51 .
The second grommet 51 has a second cover portion 52 and a second insertion portion 53 through which the electric wire 6 passes. The second grommet 51 further has an annular second connecting portion 54 for connecting with the first grommet 11 .

[Each part of the first grommet 11]
The first cover portion 12 covers the through hole Q from the first surface P1 side of the panel P. As shown in FIG. The tubular wall portion 14 is connected to the first cover portion 12 and passes through the through hole Q in the attached state. The cylindrical wall portion 14 is provided along the outer peripheral portion of the first cover portion 12 and has a cylindrical shape linear in the axial direction. The first cover portion 12 has a tubular extension wall portion 20 connected to the tubular wall portion 14, and a lid portion 21 that closes the tubular extension wall portion 20. The first cover portion 12 is , a bottomed cylindrical shape. The first cover portion 12 has a first space 29 on the inner side on the second cover portion 52 side. The cylindrical extension wall portion 20 has a tapered shape in which the dimension in the radial direction is reduced toward the lid portion 21 , but may be straight in the axial direction similarly to the cylindrical wall portion 14 .

The first insertion portion 13 is formed integrally with the first cover portion 12 . The first insertion portion 13 has a first hole 22 through which the electric wire 6 is drawn out in a direction along the first surface P1 of the panel P. As shown in FIG. In this embodiment (see FIG. 2), three first holes 22 are formed in one first insertion portion 13 . The diameter of the first hole 22 is set according to the type of the electric wire 6 . Two first holes 22 for wires 6 having an insulating coating and one first hole 22 for wires 6 passing through the corrugated tube are provided in the first insertion portion 13 . The electric wire 6 is provided in close contact with the first hole 22 .

The first insertion portion 13 lets out the electric wire 6 from the internal space K in the first direction along the first surface P1. In each figure, the first direction is the direction indicated by arrow X1. As will be described later, the second insertion portion 53 of the second grommet 51 extends from the internal space K toward a second direction opposite to the first direction, which is a direction along the second surface P2. Pull out the wire 6. In each figure, the second direction is the direction indicated by arrow X2.
The first insertion portion 13 is provided at a position on the first direction side of the first cover portion 12 . The second insertion portion 53 is provided at a position on the second direction side of the second cover portion 52 . That is, in the present embodiment, the first insertion portion 13 and the second insertion portion 53 are provided at positions opposite to each other with the center line L of the through hole Q as the center.

The first hole 22 of the first insertion portion 13 and the first space 29 inside the first cover portion 12 are connected, and the electric wire 6 passes through them. 4, the first cover portion 12 includes a guide portion 30 having a slope 30a that guides the electric wire 6 to the second cover portion 52 side (the second insertion portion 53 side). When the electric wire 6 passing through the first insertion portion 13 and positioned in the internal space K of the grommet assembly 10 contacts the slope 30a, the guide portion 30 guides the electric wire 6 toward the second cover portion 52 side. The guide portion 30 of the present embodiment is provided on the lid portion 21 of the first cover portion 12 , and the guide portion 30 is formed as a protrusion protruding from the lid portion 21 . According to the guide portion 30 , wiring workability is improved when the electric wire 6 is passed through the first grommet 11 and the second grommet 51 .

As shown in FIG. 4, one axial side of the cylindrical wall portion 14 is connected to the first cover portion 12 (extended wall portion 20). The other side in the axial direction of the tubular wall portion 14 is connected to the plate-like first annular portion 23 . The first annular portion 23 includes an inner annular portion 24 extending radially inward from the tubular wall portion 14 and an outer annular portion extending radially outward from the tubular wall portion 14 . 25. The first annular portion 23 is located on the second surface P2 side of the panel P in the attached state.

The seal portion 15 is annularly provided radially outward of the cylindrical wall portion 14 . The seal portion 15 extends from the outer annular portion 25 toward the second surface P2 side, and has an inclined shape whose diameter increases toward the first cover 12 side. The seal portion 15 is positioned on the second surface P2 side of the panel P in the attached state. The seal portion 15 is elastically deformed by contacting the second surface P2 of the panel P at its tip portion. Each figure shows a state on the assumption that the seal portion 15 is not in contact with the panel P, that is, a state before being elastically deformed. The sealing portion 15 suppresses the entry of sound from between the grommet assembly 10 and the second surface P2, and prevents the entry of foreign matter such as moisture.

The bracket part 18 is positioned on the first surface P1 side of the panel P in the attached state. The bracket portion 18 is provided radially outward of the cylindrical wall portion 14 , contacts the first surface P<b>1 of the panel P, and sandwiches the panel P with the seal portion 15 . A plurality of (three in the figure) bracket portions 18 are provided at intervals (at substantially equal intervals) along the circumferential direction. FIG. 5 is an enlarged sectional view showing the cylindrical wall portion 14 and its surroundings. The bracket portion 18 is a claw-shaped portion that extends radially outward from the cylindrical wall portion 14 and further extends toward the first annular portion 23 (seal portion 15 ) side. A gap is provided between the bracket portion 18 and the outer peripheral surface 14a of the cylindrical wall portion 14, and the bracket portion 18 is elastically deformable radially inward. The bracket portion 18 has a first contact surface 18a that contacts the inner peripheral surface of the through hole Q and a second contact surface 18b that contacts the first surface P1 of the panel P. As shown in FIG.

The second contact surface 18b contacts the first surface P1 of the panel P, and the seal portion 15 contacts the second surface P2 of the panel P, so that the grommet assembly 10 (the first grommet 11) is attached to the panel P in the axial direction. It becomes immobile and attached. The first contact surfaces 18a of the plurality (three) of bracket portions 18 come into contact with the inner peripheral surface of the through hole Q, so that the grommet assembly 10 (the first grommet 11) cannot move in the panel P in the radial direction. It will be in a state where it is attached by

FIG. 6 is an exploded perspective view of the first grommet 11. FIG. A concave groove 26 is formed along the circumferential direction on the outer peripheral side of the main body 11a of the first grommet 11 . Specifically, a concave groove 26 is formed on the outer peripheral side of the cylindrical wall portion 14 . The first grommet 11 has a cylindrical wall portion 14 that is part of the main body 11a and a circumferential member 16 that is a separate member. The circumferential member 16 fits into the groove 26 . The concave groove 26 is formed over the entire circumference of the cylindrical wall portion 14 . The circumferential member 16 is a linear member having the same length as the circumferential length of the groove 26 . The circumferential member 16 has a ring shape by connecting the ends 16 a and 16 b on both sides thereof, and can be attached to the concave groove 26 . The circumferential member 16 has three bracket portions 18 . With the circumferential member 16 attached to the groove 26, three bracket portions 18 are provided at intervals along the circumferential direction. The number of bracket portions 18 is arbitrary, but at least three is preferable.

In FIG. 5 , the first connecting portion 19 is connected to the cylindrical wall portion 14 and is connected to a second connecting portion 54 (described later) of the second grommet 51 in a tightly fitted state. The first connecting portion 19 is provided in an annular shape along the cylindrical wall portion 14 . The first connecting portion 19 is provided radially inside the tubular wall portion 14 .

A specific configuration of the first connecting portion 19 will be described. The first connecting portion 19 has an annular inner annular portion 24 extending radially inward from the tubular wall portion 14 . The inner annular portion 24 is part of the first annular portion 23 as described above. The inner annular portion 24 has an axially projecting claw portion 27 on an inner peripheral portion 24 a of the inner annular portion 24 . The claw portion 27 is provided in an annular shape on the inner annular portion 24 . Each of the first connecting portion 19 and the sealing portion 15 is a part of the first grommet 11 (main body 11a) and is elastically deformable. The first connecting portion 19 is elastically deformed when connecting with the second connecting portion 54 . A specific configuration of the second connecting portion 54 will be described later.

[Each part of the second grommet 51]
As shown in FIGS. 2, 3 and 4, the second cover portion 52 covers the through hole Q from the second surface P2 side of the panel P. As shown in FIGS. The second cover portion 52 of the present embodiment has a flat plate portion 55 having a plate shape, and an accommodation wall portion 56 having a second space 57 inside on the side of the first cover portion 12 . The flat plate portion 55 is provided widely on the first direction side indicated by the arrow X1. The housing wall portion 56 is provided on the second direction side indicated by the arrow X2. An opening hole 55a penetrating in the axial direction is formed on the second direction side of the flat plate portion 55 (see FIG. 4). The accommodation wall portion 56 is provided so as to secure the second space 57 and block the entire opening hole 55a. The second insertion portion 53 is connected to the accommodation wall portion 56 on the second direction side.

The second insertion portion 53 is formed integrally with the second cover portion 52 (accommodating wall portion 56). The second insertion portion 53 has a second hole 61 through which the electric wire 6 is drawn out in a direction along the second surface P2 of the panel P (see FIG. 7). The second holes 61 are formed in the second insertion portion 53 in the same number as the first holes 22 of the first insertion portion 13 (three in the present embodiment).

As shown in FIG. 4 , the accommodation wall portion 56 of the second cover portion 52 has an inclined wall portion 58 connected to the flat plate portion 55 and a bottom wall portion 59 connected to the inclined wall portion 58 . In the attached state, the flat plate portion 55 is positioned closer to the panel P than the bottom wall portion 59 and parallel to the panel P. As shown in FIG. The inclined wall portion 58 has an inclined surface 58a that is inclined in a direction that expands the second space 57 toward the second insertion portion 53, that is, toward the second direction indicated by the arrow X2. The second hole 61 of the second insertion portion 53, the second space 57, and the opening hole 55a of the flat plate portion 55 are connected, and the electric wire 6 passes through them. According to the inclined wall portion 58, the electric wire 6, which passes through the second insertion portion 53 and is located in the internal space K, is guided toward the first cover portion 12 (first insertion portion 13 side) when it contacts the inclined surface 58a. be. For this reason, the workability of wiring when passing an electric wire through the first grommet 11 and the second grommet 51 is improved.

As shown in FIGS. 4 and 5, the second connecting portion 54 is connected to the second cover portion 52 and is connected to the first connecting portion 19 of the first grommet 11 in a closely fitted state. The second connecting portion 54 is provided in an annular shape along the second cover portion 52 . The second connecting portion 54 has a recessed peripheral groove 60 that fits in close contact with the inner peripheral portion 24 a of the inner annular portion 24 of the first connecting portion 19 .

Specific configurations of the second connecting portion 54 and the concave circumferential groove 60 will be described. In FIG. 5 , the second connecting portion 54 has an annular second annular portion 62 , a tubular inner tubular portion 63 , and an annular engaging portion 64 . The second annular portion 62 is provided so as to be connected to the second cover portion 52 . In the attached state, the second annular portion 62 is provided axially side by side with the inner annular portion 24 (first annular portion 23) of the first connecting portion 19. touch. The inner tubular portion 63 is provided to extend axially from the second annular portion 62 . In the attached state, the inner cylindrical portion 63 is positioned radially inside the inner annular portion 24 . The engaging portion 64 is provided so as to extend radially outward from the inner cylinder portion 63 . In the attached state, the engaging portion 64 sandwiches the inner annular portion 24 with the second annular portion 62 . A space formed between the second annular portion 62 , the inner cylindrical portion 63 and the engaging portion 64 is the recessed circumferential groove 60 .

The engaging portion 64 has an annular intermediate portion 67 that extends radially outward from the inner tubular portion 63 and an outer tubular portion 65 that is short in the axial direction. The outer cylindrical portion 65 is provided extending from the radially outer side of the intermediate portion 67 toward the second annular portion 62 side. In the connected state, the outer cylindrical portion 65 is located radially outside the claw portion 27 of the first connecting portion 19 .

The second connecting portion 54 having the above configuration is provided radially inside the tubular wall portion 14 together with the first connecting portion 19 . Therefore, the first connecting portion 19 and the second connecting portion 54 which are connected to each other are provided radially inward of the seal portion 15 and further radially inward of the tubular wall portion 14 . It is As a result, it becomes difficult for foreign matter such as water to enter the internal space K of the grommet assembly 10 from between the first connecting portion 19 and the second connecting portion 54 .

Furthermore, in this embodiment, the first grommet 11 is positioned above the second grommet 51 . The inner cylindrical portion 63 is provided so as to extend axially from the second annular portion 62 toward the first cover portion 12 located on the upper side. Therefore, even in an environment where water falls from around the second grommet 51 below, water enters the internal space K of the grommet assembly 10 through the space between the first connecting portion 19 and the second connecting portion 54. more difficult to penetrate.

[Attachment of grommet assembly 10 to panel P]
An example of a method of attaching the grommet assembly 10 will be described. A circumferential member 16 is attached to the groove 26 of the main body 11 a (see FIG. 6) of the first grommet 11 . Next, the electric wire 6 is passed through the first hole 22 of the first insertion portion 13 of the first grommet 11 . The electric wire 6 is passed through the second hole 61 of the second insertion portion 53 of the second grommet 51 . The first connecting portion 19 and the second connecting portion 54 are connected, and the panel P is sandwiched between the bracket portion 18 and the seal portion 15, whereby the grommet assembly 10 is attached to the panel P.

When connecting the first connecting portion 19 and the second connecting portion 54 as described above (see FIG. 4), the claw portion 27 on the first connecting portion 19 side pushes the outer cylinder portion 65 on the second connecting portion 54 side. Pushing from the outside in the radial direction inward, the claw portion 27 and the outer cylinder portion 65 are elastically deformed, the claw portion 27 exceeds the outer cylinder portion 65, and the claw portion 27 fits inside the outer cylinder portion 65 in the radial direction. . When the claw portion 27 pushes the outer cylinder portion 65 , the radially inner side of the claw portion 27 comes into contact (sliding contact) with the radially outer side of the outer cylinder portion 65 .

Therefore, in this embodiment (see FIG. 5), the claw portion 27 has a first inclined surface 28 . The first inclined surface 28 is provided on the radially inner side (inner peripheral side) of the claw portion 27 , and is a surface that is inclined radially outward toward the projecting direction of the claw portion 27 . Since the claw portion 27 is annularly provided along the entire circumference of the first connecting portion 19, the first inclined surface 28 is a tapered surface. According to this first inclined surface 28, when connecting the first grommet 11 and the second grommet 51, the claw portion 27 can easily pass over the outer cylindrical portion 65, thereby assembling the first grommet 11 and the second grommet 51. Workability is improved.

Moreover, compared to the case where the claw portion 27 does not have the first inclined surface 28 , the rigidity of the claw portion 27 becomes lower when the first inclined surface 28 is provided. For this reason, the claw portion 27 is elastically deformed to easily pass over the outer cylindrical portion 65, thereby improving the assembling workability.

As described above, when the first connecting portion 19 and the second connecting portion 54 are connected, the radially inner side of the claw portion 27 comes into contact (sliding contact) with the radially outer side of the outer cylinder portion 65 . Therefore, in order to reduce the frictional resistance generated between the claw portion 27 and the outer cylinder portion 65, the first inclined surface 28 has a rough surface configured with minute irregularities. In this embodiment, the entire first inclined surface 28 is a rough surface. The rough surface of the first inclined surface 28 is a satin-finished surface, and reduces the contact area with the outer cylinder portion 65, which is the contact partner, compared to the case of a smooth surface.

According to the first inclined surface 28 configured by the rough surface, the frictional resistance between the claw portion 27 and the outer cylinder portion 65 is reduced as compared with the case where the first inclined surface 28 is a smooth surface. As a result, it becomes easier for the claw portion 27 to pass over the outer cylindrical portion 65, and the assembling workability of the first grommet 11 and the second grommet 51 is improved.

Moreover, in this embodiment, the outer cylinder part 65 has the second inclined surface 66 . The second inclined surface 66 is provided on the radially outer side (peripheral side) of the outer cylindrical portion 65 and is a surface that slopes radially inward toward the second annular portion 62 side. Since the outer cylindrical portion 65 is provided along the entire circumference of the second connecting portion 54, the second inclined surface 66 is a tapered surface. According to this second inclined surface 66 , when connecting the first grommet 11 and the second grommet 51 , the claw portion 27 can easily pass over the outer cylindrical portion 65 , thereby assembling the first grommet 11 and the second grommet 51 together. Workability is improved.

Moreover, compared with the case where the outer cylinder part 65 does not have the second inclined surface 66, the rigidity of the outer cylinder part 65 becomes low when the second inclined surface 66 is provided. Therefore, the elastic deformation of the outer cylindrical portion 65 makes it easier for the claw portion 27 to pass over the outer cylindrical portion 65, thereby improving the assembling workability.

In order to reduce the frictional resistance generated between the pawl portion 27 and the outer cylinder portion 65, the second inclined surface 66 has a rough surface configured by minute irregularities. In this embodiment, the entire second inclined surface 66 is a rough surface. The rough surface of the second inclined surface 66 is a satin-finished surface, and reduces the contact area with the claw portion 27, which is the contact partner, compared to the case of a smooth surface.

According to the second inclined surface 66 configured by a rough surface, the frictional resistance between the claw portion 27 and the outer cylinder portion 65 is reduced compared to the case where the second inclined surface 66 is a smooth surface. As a result, it becomes easier for the claw portion 27 to pass over the outer cylindrical portion 65, and the assembling workability of the first grommet 11 and the second grommet 51 is improved.

On the other hand, the radially outer side surface (outer peripheral surface) of the claw portion 27 is a cylindrical surface that is linear in the axial direction, and the radially inner side surface (inner peripheral surface) of the outer cylindrical portion 65 is linear in the axial direction. It is a straight cylindrical surface. In the mounted state, these cylindrical surfaces are in surface contact. Therefore, even if the claw portion 27 tries to displace radially outward in the attached state, it is difficult for the claw portion 27 to pass over the outer cylindrical portion 65 and the first connecting portion 19 and the second connecting portion 54 are hard to come off.
As described above, according to the first connecting portion 19 and the second connecting portion 54 of the present embodiment, these connections are easy, but once they are connected, the connection is difficult to be released (hard to come off).
In this embodiment, both the first inclined surface 28 and the second inclined surface 66 are provided, but at least one of them may be provided.

FIG. 7 is a perspective view of the grommet assembly 10 in a disassembled state, viewed from the second insertion portion 53 side. The first grommet 11 has one projection 35 on a portion along the circumferential direction of the tubular wall portion 14 . The protrusion 35 protrudes from the first annular portion 23 toward the second grommet 51 side. The second grommet 51 has one recess 68 in which the projection 35 fits. A recess 68 is formed in a portion of the second annular portion 62 . When connecting and assembling the first grommet 11 and the second grommet 51 , the projection 35 is fitted into the recess 68 to position the first grommet 11 and the second grommet 51 , thereby facilitating assembly. After assembly, the first grommet 11 and the second grommet 51 are prevented from turning by fitting the projection 35 and the recess 68 .

Contrary to the above configuration, although not shown, the first grommet 11 may have a recess and the second grommet 51 may have a projection. However, the first grommet 11 has a seal portion 15 for stopping water between the panel P and the first grommet 11 . As shown in FIG. 7, a configuration in which the second grommet 51 is provided with the recessed portion 68 is more preferable than such a configuration in which the first grommet 11 is provided with the recessed portion, from the viewpoint of ensuring water stopping performance.

FIG. 8 is a perspective view of the second grommet 51. FIG. The second insertion portion 53 has a plurality (three) of second holes 61 through which a plurality of (three in the illustrated example) wires 6 are passed. In this embodiment, the second insertion portion 53 has an independent tubular portion for each of the three electric wires 6 . A second hole 61 for one electric wire 6 is formed in each of the tubular portions. Although not shown, three second holes 61 may be formed in one second insertion portion 53 like the first grommet 11 .

The second grommet 51 has partition walls 69, 69 that divide the wiring area E in the second grommet 51 into a plurality of individual areas E1, E2, E3. The wiring area E is the second space 57 of the second cover portion 52 and is an area of the second grommet 51 through which the electric wire 6 passes. The wiring area E is partitioned by two partition walls 69, 69 into three individual areas E1, E2, E3 for the three wires 6 passing through the three second holes 61, respectively.

The partition wall 69 is provided at least on the inclined wall portion 58 of the second cover portion 52 . In this embodiment, one partition wall 69 is also provided on the flat plate portion 55 by extending from the inclined wall portion 58 . According to the partition walls 69 , 69 , in the wiring area E, it is possible to prevent the three electric wires 6 from passing through the wrong second hole 61 due to the crossing of the three electric wires 6 . Note that the first grommet 11 may also have the partition wall.

[About the grommet assembly 10 of the embodiment]
As described above, the grommet assembly 10 of the embodiment is attached to the panel P provided with the through hole Q, and protects the electric wire 6 passing through the through hole Q. To that end, grommet assembly 10 includes first grommet 11 and second grommet 51 . The first grommet 11 has a first cover portion 12 that covers the through hole Q from the first surface P1 side of the panel P, and a first insertion portion 13 through which the electric wire 6 passes. The second grommet 51 has a second cover portion 52 that covers the through hole Q from the second surface P2 side of the panel P, and a second insertion portion 53 through which the electric wire 6 passes.

The first grommet 11 further has a tubular wall portion 14 , an annular sealing portion 15 , a bracket portion 18 and an annular first connecting portion 19 . The tubular wall portion 14 is connected to the first cover portion 12 and passes through the through hole Q. As shown in FIG. The seal portion 15 is provided radially outward of the cylindrical wall portion 14 and contacts the panel P. As shown in FIG. The bracket portion 18 is provided radially outward of the cylindrical wall portion 14 and sandwiches the panel P between itself and the seal portion 15 . The first connecting portion 19 is connected to the cylindrical wall portion 14 and connected to the second grommet 51 (the second connecting portion 54).

According to the grommet assembly 10 of the embodiment, the first cover portion 12 covers the through hole Q from the first surface P1 side of the panel P, and the second cover portion 52 covers the through hole Q from the second surface P2 side of the panel P. cover from By connecting the first grommet 11 and the second grommet 51 by the first connecting portion 19, the internal space K becomes a closed space. The seal 15 is annular and contacts around the through hole Q of the panel P along the entire circumference. Therefore, the sound insulation of the grommet assembly 10 attached to the panel P is improved.

The seal portion 15 contacts the second surface P2 of the panel P, and the bracket portion 18 contacts the first surface P1 of the panel P. As shown in FIG. Even in an environment where water falls on the grommet assembly 10 from the second surface P2 side, it is difficult for the water to reach the first surface P1 side. The above configuration is particularly suitable when the grommet assembly 10 is attached to the panel P that separates an area such as an underfloor of the vehicle from an area on the inside of the vehicle, for example, when road noise is suppressed from entering the inside of the vehicle. is.

The first cover portion 12 has a tubular extension wall portion 20 connected to the tubular wall portion 14 and a lid portion 21 that closes the tubular extension wall portion 20, and has a bottomed tubular shape. Therefore, the first grommet 11 has a dome shape, the internal space K is enlarged, and the sound insulation is further improved.

The first insertion portion 13 has a first hole 22 through which the electric wire 6 is drawn out in a direction along the first surface P1 of the panel P. As shown in FIG. With this configuration, the first insertion portion 13 does not protrude greatly in the axial direction orthogonal to the panel P, and the first grommet 11 is miniaturized. It becomes possible to wire the electric wire 6 let out from the first insertion portion 13 along the first surface P1 of the panel P, and the workability of the wiring may be improved.

The second insertion portion 53 has a second hole 61 through which the electric wire 6 is drawn out in a direction along the second surface P2 of the panel P. As shown in FIG. With this configuration, the second insertion portion 53 does not protrude greatly in the axial direction orthogonal to the panel P, and the size of the second grommet 51 is reduced. It becomes possible to wire the electric wire 6 let out from the second insertion portion 53 along the second surface P2 of the panel P, and the workability of the wiring may be improved.

As shown in FIG. 6, a concave groove 26 is formed in the cylindrical wall portion 14 of the first grommet 11 along the circumferential direction. The first grommet 11 has a cylindrical wall portion 14 (main body 11 a ) and a circumferential member 16 which is a separate member, and the circumferential member 16 fits into the concave groove 26 . The circumferential member 16 has a bracket portion 18 . The first grommet 11 has a bracket portion 18 by attaching the circumferential member 16 to the groove 26 . The grommet assembly 10 is attached to the panel P by sandwiching the panel P between the bracket portion 18 and the seal portion 15 . In the attached state, the force acting on the bracket portion 18 from the panel P is transmitted to the tubular wall portion 14 through the circumferential member 16 fitted in the groove 26 . Therefore, the attachment force of the grommet assembly 10 to the panel P by the bracket portion 18 is improved.

As shown in FIG. 4 , the first connecting portion 19 of the first grommet 11 has an inner annular portion 24 extending radially inward from the tubular wall portion 14 . The second grommet 51 has an annular second connecting portion 54 connected to the first connecting portion 19 . The second connecting portion 54 has a recessed peripheral groove 60 that fits in close contact with the inner peripheral portion 24 a of the inner annular portion 24 . Since the inner peripheral portion 24a of the inner annular portion 24 and the recessed peripheral groove 60 are closely fitted, the airtightness of the internal space K of the grommet assembly 10 is improved, and the sound insulation and water blocking properties are further improved.

As shown in FIG. 5 , the second connecting portion 54 has a second annular portion 62 connected to the second cover portion 52 , an inner tubular portion 63 , and an annular engaging portion 64 . The second annular portion 62 is axially aligned with the inner annular portion 24 of the first connecting portion 19 and contacts the inner annular portion 24 . The inner tubular portion 63 extends axially from the second annular portion 62 and is positioned radially inside the inner annular portion 24 . The engaging portion 64 extends radially outward from the inner cylindrical portion 63 and sandwiches the inner annular portion 24 with the second annular portion 62 . A space formed between the second annular portion 62 , the inner cylindrical portion 63 and the engaging portion 64 is the recessed peripheral groove 60 .

The inner annular portion 24 of the first connecting portion 19 has a claw portion 27 protruding in the axial direction on its inner peripheral portion. The engaging portion 64 of the second connecting portion 54 has an outer cylindrical portion 65 located radially outside the claw portion 27 in the attached state. With this configuration, even if a portion of the inner annular portion 24 of the first connecting portion 19 is displaced radially outward from the attached state and is about to come out of the concave circumferential groove 60 of the second connecting portion 54, the claw portion 27 is caught on the outer cylindrical portion 65 , the displacement is hindered, and a part of the inner annular portion 24 is difficult to come off from the recessed circumferential groove 60 . In other words, the above configuration improves the connection strength between the first grommet 11 and the second grommet 51 .

In this embodiment, the claw portion 27 has a first inclined surface 28 on its radially inner side. Therefore, when connecting the first connecting portion 19 and the second connecting portion 54, the claw portion 27 can easily pass over the outer cylindrical portion 65, and the assembling workability of the first grommet 11 and the second grommet 51 is improved. . Furthermore, the first inclined surface 28 has a rough surface for reducing the contact area with the outer tube portion 65 . As a result, the frictional resistance between the claw portion 27 and the outer cylinder portion 65 is reduced, the claw portion 27 can easily pass over the outer cylinder portion 65, and the assembling workability is further improved.

In this embodiment, the outer cylindrical portion 65 has a second inclined surface 66 on its radially outer side. Therefore, when connecting the first connecting portion 19 and the second connecting portion 54, the claw portion 27 can easily pass over the outer cylindrical portion 65, and the assembling workability of the first grommet 11 and the second grommet 51 is improved. . Furthermore, the second inclined surface 66 has a rough surface for reducing the contact area with the claw portion 27 . As a result, the frictional resistance between the claw portion 27 and the outer cylinder portion 65 is reduced, the claw portion 27 can easily pass over the outer cylinder portion 65, and the assembling workability is further improved.

〔others〕
FIG. 9 is a cross-sectional view showing a modification of the first connecting portion 19 and the second connecting portion 54. As shown in FIG. In the form shown in FIG. 5, the claw portion 27 has the first inclined surface 28, but as shown in FIG. 9, the first inclined surface 28 may be omitted. Moreover, although the outer cylinder part 65 has the second inclined surface 66 in the form shown in FIG. 5, the second inclined surface 66 may be omitted as shown in FIG.

FIG. 10 is a cross-sectional view showing another modification of the first connecting portion 19 and the second connecting portion 54. As shown in FIG. In the embodiment shown in FIG. 5, the first connecting portion 19 has the claw portion 27, and the second connecting portion 54 has the outer cylindrical portion 65 that hangs over the claw portion 27. It has a groove shape that expands the space. As shown in FIG. 10 , the claw portion may be omitted from the inner annular portion 24 . In this case, the inner peripheral portion 24a of the inner annular portion 24 has a cross-sectional shape that is straight in the radial direction, and the concave peripheral groove 60 having a groove shape substantially identical to the cross-sectional shape is formed in the second connecting portion 54. has. That is, the circumferential concave groove 60 has a groove shape that does not expand the space on the far side.
It is sufficient that the first connecting portion 19 and the second connecting portion 54 are connected so that the first grommet 11 and the second grommet 51 in the connected state are not separated by an axial force acting during normal use. , a fitting structure as shown in FIG. 9 or FIG.

Although the second grommet 51 does not have a bottomed tubular shape like the first grommet 11 in the embodiment shown in FIG. may have In the above-described embodiment, the second cover portion 52 includes a flat plate portion 55 having a plate shape and an accommodation wall portion protruding from a part of the flat plate portion 55 in order to prevent the second grommet 51 from interfering with other articles. 56.

As shown in FIG. 6, the bracket portion 18 of the first grommet 11 is configured by part of the circumferential member 16 that is separate from the main body 11a. This is to facilitate manufacturing of the first grommet 11 with the bracket portion 18 . The bracket portion 18 may be configured from a portion of the main body 11a like the seal 15 and the first connecting portion 19, instead of being a separate member.
The directions in which the wires 6 are let out by the first insertion portion 13 and the second insertion portion 53 may be directions other than the direction along the panel P, and may be inclined with respect to the panel P.

The above embodiments are illustrative in all respects and are not restrictive. The scope of rights of the present invention is indicated by the scope of claims rather than the above embodiments, and includes all modifications within the range equivalent to the structure described in the scope of claims.

6 Electric wire 7 Wire harness 8 First electric device 9 Second electric device 10 Grommet assembly 11 First grommet 11a Main body 12 First cover part 13 First insertion part 14 Cylindrical wall part 14a Peripheral surface 15 Seal part 16 Circumference Directional member 16a, 16b End 18 Bracket part 18a First contact surface 18b Second contact surface 19 First connecting part 20 Extension wall part 21 Lid part 22 First hole 23 First annular part 24 Inner annular part 24a Inner peripheral part 25 Outer annular portion 26 Groove 27 Claw portion 28 First inclined surface 29 First space 30 Guide portion 30a Slanted surface 35 Projection 51 Second grommet 52 Second cover portion 53 Second insertion portion 54 Second connecting portion 55 Flat plate portion 55a Opening hole 56 housing wall portion 57 second space 58 inclined wall portion 58a inclined surface 59 bottom wall portion 60 recessed peripheral groove 61 second hole 62 second annular portion 63 inner cylinder portion 64 engaging portion 65 outer cylinder portion 66 second inclined surface 67 Intermediate part 68 Recess 69 Partition wall E Wiring area E1, E2, E3 Individual area K Internal space L Center line P Panel P1 First surface P2 Second surface Q Through hole

Claims (19)

A grommet assembly attached to a panel having a through hole and protecting an electric wire passing through the through hole,
a first grommet having a first cover portion covering the through hole from the first surface side of the panel and a first insertion portion through which the electric wire passes;
a second grommet having a second cover portion covering the through hole from the second surface side of the panel and a second insertion portion through which the electric wire passes;
with
The first grommet is
a cylindrical wall portion connected to the first cover portion and penetrating the through hole;
an annular seal portion provided radially outward of the cylindrical wall portion and in contact with the panel;
a bracket portion provided radially outside of the tubular wall portion and sandwiching the panel between the sealing portion and the tubular wall portion;
an annular first connecting portion connected to the cylindrical wall portion and connected to the second grommet;
a grommet assembly. 2. The first cover portion has a tubular extension wall portion connected to the tubular wall portion, and a lid portion closing the tubular extension wall portion, and has a bottomed tubular shape. grommet assembly. The grommet assembly according to claim 1 or 2, wherein said first insertion portion has a first hole through which said electric wire is paid out in a direction along said first surface of said panel. The first cover part has an inclined surface that guides the electric wire, which passes through the first insertion part and is located in an internal space formed between the first grommet and the second grommet, toward the second cover part. 4. The grommet assembly of claim 3, comprising a guide portion having a . The grommet assembly according to any one of claims 1 to 4, wherein the second insertion portion has a second hole through which the electric wire is fed in a direction along the second surface of the panel. The first grommet has a protrusion along the circumferential direction of the tubular wall,
A grommet assembly according to any preceding claim, wherein the second grommet has a recess into which the projection fits. The cylindrical wall portion has a groove formed along the circumferential direction,
The first grommet has a circumferential member that is separate from the cylindrical wall and fits into the groove,
A grommet assembly according to any preceding claim, wherein the circumferential member comprises the bracket portion. the seal portion contacts the second surface of the panel;
The grommet assembly of any one of claims 1-7, wherein the bracket portion contacts the first surface of the panel. The grommet assembly according to any one of claims 1 to 8, wherein the first connecting portion is provided radially inwardly of the tubular wall portion. The second grommet has an annular second connecting portion connected to the second cover portion and connected to the first connecting portion,
The first connecting portion has an inner annular portion extending radially inward from the cylindrical wall portion,
The grommet assembly according to any one of claims 1 to 9, wherein the second connecting portion has a concave peripheral groove that closely fits the inner peripheral portion of the inner annular portion. The second connecting part is
a second annular portion connected to the second cover portion and arranged axially with the inner annular portion and in contact with the inner annular portion;
an inner tubular portion axially extending from the second annular portion and positioned radially inward of the inner annular portion;
an annular engaging portion extending radially outward from the inner cylindrical portion and sandwiching the inner annular portion with the second annular portion;
has
The grommet assembly according to claim 10, wherein the space formed between the second annular portion, the inner tubular portion and the engaging portion is the concave circumferential groove. A grommet assembly in which the first grommet is positioned above the second grommet,
12. The inner tubular portion according to claim 11, wherein the inner cylindrical portion is provided to extend axially from the second annular portion toward the first cover portion located on the upper side, and is located radially inside the inner annular portion. grommet assembly. The inner annular portion has an axially protruding pawl portion on an inner peripheral portion of the inner annular portion,
13. The grommet assembly according to claim 11 or 12, wherein the engaging portion has an outer tubular portion positioned radially outwardly of the pawl portion. 14. The grommet assembly according to claim 13, wherein the pawl has a first inclined surface radially inwardly of the pawl and inclined radially outward in a protruding direction of the pawl. 15. The grommet assembly according to claim 13 or 14, wherein the outer tubular portion has a second inclined surface on the radially outer side of the outer tubular portion that slopes radially inward toward the second annular portion. 15. The grommet assembly of claim 14, wherein the first sloped surface has a roughened surface to reduce contact area with the barrel. 16. The grommet assembly of claim 15, wherein the second angled surface has a roughened surface to reduce contact area with the pawl. The second insertion portion has a plurality of second holes through which the plurality of electric wires pass,
The second grommet has a partition wall that partitions a wiring area in the second grommet into a plurality of separate areas for the plurality of electric wires passing through the plurality of second holes. 18. The grommet assembly of any one of clause 17. A wire harness comprising: a wire passing through a through hole provided in a panel; and a grommet assembly attached to the panel and protecting the wire,
A wire harness, wherein the grommet assembly is the grommet assembly of any one of claims 1-18.

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