JP2022112532A - Grommet mounting structure and grommet - Google Patents

Abstract

To secure water stopping performance even when there are steps with partially different heights around a mounting hole.SOLUTION: A grommet mounting structure 50 includes a mounting panel 100 having a mounting hole 101 penetrating through a water surface 102 on one side and a surface to be locked 103 on the other side, and a step 103a formed around the mounting hole on the surface to be locked, a grommet body 10 that is capable of stopping water between the grommet body and the water surface of the mounting panel, and is provided such that a wiring material W that penetrates the mounting hole can be inserted, and a grommet inner 20 fitted in the mounting hole with the grommet body attached, and the grommet inner includes, around an axis line, a plurality of locking arm portions 22 each including an elastic portion 22A that is elastically deformable along the radial direction, and a plurality of locking claws 22B that are formed integrally with the elastic portion and that are capable of being locked to the edge of the mounting hole on the surface to be locked and provided along the axial direction X, and one of the plurality of locking claws of the locking arm portion is locked to the edge of the mounting hole according to the step of the mounting panel.SELECTED DRAWING: Figure 3

Description

The present invention relates to a grommet mounting structure and a grommet.

As a conventional grommet applied to a vehicle or the like, for example, Patent Document 1 discloses a grommet body made of a soft material for closely holding a linear body, and a grommet body assembled to the grommet body and locked and fixed to a predetermined opening. A grommet is disclosed which consists of a ring portion of rigid material having a locking portion which is fastened. This grommet has a ring portion formed with a plurality of stages of locking portions that are locked to openings of different sizes.

JP-A-09-161580

By the way, it is desirable that the grommet as described above ensures proper water stopping performance even when there are steps with different heights around the mounting hole of the panel to which the grommet is to be mounted, for example. It is rare.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a grommet mounting structure that can ensure water stopping performance even if there are steps with different heights around the mounting hole, and The purpose is to provide a grommet.

In order to achieve the above object, a grommet mounting structure according to the present invention has one surface configured as a water surface to be engaged and the other surface configured as a surface to be engaged. a mounting hole penetrating through the surface, and a step formed around the mounting hole on the locked surface, and the water surface of the mounting panel can be stopped. and a grommet body provided so that a wiring member penetrating the mounting hole can be inserted along an axis extending in the through-hole direction of the mounting hole; and the mounting hole with the grommet body attached. a grommet inner to be fitted to the grommet inner, wherein the grommet inner includes an elastic portion that is elastically deformable along a radial direction that intersects with the axis; a locking arm portion including a plurality of locking pawls provided along the extending direction of the axis and capable of being locked to the edge of the mounting hole on the surface to be locked of the mounting panel; , and one of the plurality of locking claws of each of the plurality of locking arm portions is locked to the edge of the mounting hole according to the step of the mounting panel.

In order to achieve the above object, a grommet according to the present invention has one surface configured as a water surface to be engaged, and the other surface configured as a surface to be engaged, so that the water surface to be engaged and the surface to be engaged are provided. A mounting hole is formed through the mounting hole, and a step is formed around the mounting hole on the locked surface. A grommet body provided so that a wiring member can be inserted through the mounting hole along an axis extending in the direction of penetration of the mounting hole, and a grommet inner fitted into the mounting hole with the grommet body attached. and the grommet inner includes an elastic portion that is elastically deformable along a radial direction that intersects with the axis; a plurality of locking arm portions around the axis that are capable of being locked to the edge of the mounting hole on the surface and include a plurality of locking claws provided along the extending direction of the axis; One of the plurality of locking claws of each of the plurality of locking arm portions is locked to the edge of the mounting hole according to the step of the mounting panel.

ADVANTAGE OF THE INVENTION The grommet attachment structure and grommet which concern on this invention are effective in the ability to ensure waterproof performance, even if there exists a level|step difference with a different height partially around an attachment hole.

1 is an exploded perspective view of a grommet according to an embodiment. FIG. FIG. 2 is an exploded perspective view of the grommet according to the embodiment. FIG. 3 is a side sectional view of the grommet according to the embodiment.

EMBODIMENT OF THE INVENTION Below, embodiment which concerns on this invention is described in detail based on drawing. In addition, this invention is not limited by this embodiment. In addition, components in the following embodiments include components that can be easily replaced by those skilled in the art, or components that are substantially the same.

[Embodiment]
A grommet 1 of the present embodiment shown in FIGS. 1 to 3 is incorporated in a wire harness WH that is routed in a vehicle or the like. Here, the wire harness WH is, for example, a bundle of a plurality of wiring materials W used for power supply and signal communication for connection between devices mounted on a vehicle. The wiring material W is connected to each device. 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 components such as a corrugated tube, a resin tape, an exterior member such as a protector, an electrical connection box, and a fixture. The wiring material W is composed of, for example, a metal rod, an electric wire, a bundle of electric wires, or the like. The metal rod is a conductive rod-shaped member whose outside is covered with an insulating coating. An electric wire is formed by covering the outside of a conductor portion (core wire) made of a plurality of conductive metal wires with a covering portion having insulating properties. A wire bundle is a bundle of wires. The wire harness WH bundles and aggregates a plurality of wiring materials W, and various devices are electrically connected via connectors or the like provided at the ends of the bundled wiring materials W. FIG.

The grommet 1 is used when routing the wiring material W across two spaces separated by the mounting panel 100 as a boundary through the mounting hole 101 formed in the mounting panel 100 to be mounted. It is applied to the hole 101 . The mounting panel 100 is, for example, a metal plate that constitutes a vehicle body or the like, and the mounting hole 101 penetrates the mounting panel 100 along the plate thickness direction. The two spaces defined by the mounting panel 100 are typically an interior space (eg, cabin) and an exterior space (eg, engine compartment).

One surface of the mounting panel 100 facing in the axial direction X is configured as a target water surface 102 , and the other surface is configured as a locked surface 103 . The mounting hole 101 extends through the target water surface 102 and the target surface 103 . The water surface 102 to be covered is formed as a uniform flat surface along the entire circumference of the edge of the mounting hole 101 . The water-receiving surface 102 is a surface of the grommet 1 that can come into contact with a water-stopping portion 11A, which will be described later. On the other hand, the locked surface 103 is formed with a step 103a around the edge of the mounting hole 101 . As shown in FIG. 3, the step 103a is formed such that the plate thickness between the water surface 102 and the surface 103 to be engaged differs around the edge of the mounting hole 101. Here, four steps are provided. A step 103a is provided.

The grommet 1 is attached to the mounting hole 101 in a state in which the wiring material W of the wire harness WH is inserted through and is wrapped around the wiring material W, so that the wiring material W passing through the mounting hole 101 is installed. It protects and also water-stops (waterproofs) the mounting hole 101 . The grommet 1 has functions of waterproofing the mounting hole 101 as well as dustproofing and soundproofing. The grommet mounting structure 50 of this embodiment includes the mounting panel 100 and the grommet 1 described above. Hereinafter, the configuration of the grommet 1 will be described in detail with reference to each drawing.

In the following description, of the first direction, the second direction, and the third direction that intersect each other for convenience, the first direction will be referred to as the "axial direction X" and the second direction will be referred to as the "width direction Y." and the third direction is called "height direction Z". The axial direction X, width direction Y, and height direction Z are typically orthogonal to each other. Here, the axial direction X corresponds to the plate thickness direction of the mounting panel 100 described above, and corresponds to the insertion direction of the wiring member W and the grommet 1 into the mounting hole 101 . In other words, the axial direction X is the direction along which the wiring material W inserted through the grommet 1 extends. The width direction Y and the height direction Z correspond to the extension directions of the mounting panel 100 . Here, for convenience of explanation, it is assumed that the wiring material W is linearly wired along the axial direction X. The wiring member W inserted through the grommet 1 may be partially bent or curved so as to deviate from the axial direction X in this state. In addition, each direction used in the following description will be described as the direction when the grommet 1 is assembled to the mounting panel 100 unless otherwise specified. An axis C passing through the center of the mounting hole 101 is orthogonal to the plate surface of the mounting panel 100 and extends along the axial direction X. As shown in FIG. A direction perpendicular to the axis C is called a radial direction, a side away from the axis C is called a radial outer side, and a side closer to the axis C is called a radial inner side.

The grommet 1 of this embodiment includes a grommet body 10 and a grommet inner 20, as shown in FIGS.

The grommet main body 10 includes a main body portion 11 and a tubular portion 12, which are integrally formed as an elastic body. The grommet body 10 is made of, for example, an insulating elastic resin material having low rigidity and high flexibility, such as rubber or thermoplastic elastomer (eg, ethylene-propylene-diene rubber (EPDM), etc.).

The main body portion 11 is a portion that stops water in the mounting hole 101 and through which the wiring material W is inserted along the axial direction X when the main body portion 11 is mounted in the mounting hole 101 of the mounting panel 100 . The body portion 11 includes a water stop portion 11A and a blocking portion 11B, and is formed in a dome shape as a whole.

The water stop portion 11A is formed in an annular shape so as to surround the mounting hole 101 of the mounting panel 100 . The water cutoff portion 11A is a portion that comes into contact with the water surface 102 of the mounting panel 100 to cut off water between the water surface 102 and the water cutoff portion 11A. The water stop portion 11A of this embodiment is formed as a tongue-like outer peripheral portion along the ring shape of the water stop portion 11A so that the tip thereof faces the target water surface 102 . The water stop portion 11A is formed such that the tip 11Aa faces radially inward. Therefore, the water stop portion 11A is formed in an annular shape around the axis C, and narrowed toward the water surface 102 to approach the axis C. As shown in FIG. When the grommet 1 is attached to the mounting hole 101 , the water stop portion 11</b>A adheres tightly to the water-receiving surface 102 along the periphery of the mounting hole 101 due to elastic deformation, thereby sealing the entire periphery of the mounting hole 101 .

The closing portion 11B is formed so as to be integrally connected to the base end of the water stopping portion 11A, and is formed so as to close the ring of the water stopping portion 11A. Therefore, the closing portion 11B is configured to cover and close the mounting hole 101 together with the water stopping portion 11A on the side of the water surface 102 of the mounting panel 100 to which the water stopping portion 11A is in close contact. In addition, as shown in FIG. 3, on the inner surface of the main body portion 11, a continuous annular groove portion 11C is formed between the blocking portion 11B and the water stop portion 11A.

The cylindrical portion 12 is formed integrally with the main body portion 11 in a cylindrical shape, and the wiring material W is inserted therein along the axial direction X. As shown in FIG. The cylindrical portion 12 is provided integrally with the closing portion 11B. The cylindrical portion 12 is formed in a cylindrical shape about the axis C and extends along the axial direction X. As shown in FIG. The cylindrical portion 12 has an open distal end portion 12A on one side in the axial direction X, and a proximal end portion 12B on the other side is connected to the closing portion 11B. The diameter of the cylindrical portion 12 is smaller at the distal end portion 12A than at the proximal end portion 12B. The cylindrical portion 12 has a lip portion 12Aa formed on the inner peripheral surface of the tip portion 12A. The lip portions 12Aa are fold-shaped water stop portions that are annularly formed along the circumferential direction, and are provided in plurality along the axial direction X at intervals. Each lip portion 12Aa comes into contact with the outer surface of the wiring member W in a state in which the wiring member W is inserted inside the tubular portion 12, thereby stopping water between the lip portion 12Aa and the outer surface. The opening of the cylindrical portion 12 is watertight by winding a winding tape or the like over the inserted wiring material W and the cylindrical portion 12 .

Further, the cylindrical portion 12 includes a pipe member 12C. 12 C of pipe members are provided in the base end part 12B of the cylinder part 12, and are formed so that the said base end part 12B may be penetrated in the axial direction X. As shown in FIG. Therefore, the pipe member 12C is provided through the grommet 1. As shown in FIG. After the grommet 1 is attached to the attachment hole 101 of the attachment panel 100, the pipe member 12C is used, for example, to pass a pipe through which the washer fluid passes in the axial direction X, although not shown in the figure.

The grommet inner 20 is a member to which the grommet body 10 is attached and the wiring material W is inserted inside, and which can be fitted along the edge of the mounting hole 101 of the mounting panel 100 . The grommet inner 20 includes a body portion 21, a locking arm portion 22, and a flange portion 23, as shown in FIGS. The grommet inner 20 is formed as a rigid body having higher rigidity than the grommet main body 10 by integrating the body portion 21 , the locking arm portion 22 , and the flange portion 23 . The grommet inner 20 is made of, for example, a synthetic resin material such as polypropylene (PP) having higher rigidity than the grommet main body 10 . The body portion 21 is formed in a tubular shape extending in the axial direction X along the shape of the attachment hole 101 of the attachment panel 100, and the tubular shape is divided into a first member 21A and a second member 21B. The first member 21A and the second member 21B are formed in a symmetrical shape, and form a tubular shape by fitting mutual claws 21Aa and 21Ba and holes 21Ab and 21Bb. Although details will be described later, the locking arm portion 22 is formed so as to protrude outward from the outer peripheral surfaces of the first member 21A and the second member 21B of the body portion 21 . The locking arm portion 22 is provided so as to be hooked to the edge of the mounting hole 101 of the mounting panel 100 and attaches the body portion 21 to the edge of the mounting hole 101 . The locking arm portions 22 are arranged at a plurality of positions around the axis C with equal intervals with respect to the cylindrical main body portion 21, and are arranged at four positions in the present embodiment. The flange portion 23 extends outward from the main body portion 21 at one end of the tubular body portion 21 and is continuously provided along the tubular shape of the main body portion 21 in the circumferential direction. The flange portion 23 is formed by being divided together with the first member 21A and the second member 21B of the body portion 21 . The collar portion 23 is inserted into a groove portion 11C formed in the body portion 11 of the grommet body 10 . The grommet inner 20 is formed into a tubular shape by fitting the first member 21A and the second member 21B together with the flange portion 23 inserted into the groove portion 11C of the body portion 11 of the grommet body 10. to hook the locking arm portion 22 to the edge of the mounting hole 101 of the mounting panel 100 . By doing so, the grommet inner 20 is attached to the attachment hole 101 of the attachment panel 100 together with the grommet body 10, as shown in FIG. The grommet main body 10 attached to the mounting hole 101 of the mounting panel 100 by the grommet inner 20 has a water blocking portion 11A that comes into contact with the water surface 102 of the mounting panel 100 to exhibit water blocking performance. Here, the first member 21A and the second member 21B are described as being formed separately, but they may be connected in a hinge shape so that they can be opened and closed with each other.

This grommet 1 has a first member 21A of a grommet inner 20 and a second member 21A of a grommet inner 20 so that after the wiring material W is inserted through the cylindrical portion 12 of the grommet body 10, the wiring material W passes through the tubular shape. 21B is assembled to the grommet body 10, and the first member 21A and the second member 21B are fitted. The grommet inner 20 can be easily inserted into the groove 11C of the grommet main body 10 by having the first member 21A and the second member 21B that are divided. Moreover, the grommet inner 20 can be easily fitted to the grommet main body 10 while avoiding the wiring material W by having the first member 21A and the second member 21B which are divided. Since the first member 21A and the second member 21B are formed in symmetrical shapes, the grommet inner 20 can be obtained by molding the same members. By the procedure so far, the grommet 1 is attached to the wiring material W, and together with the wiring material W, the wire harness WH is configured. After that, the grommet 1 is inserted through the tubular portion 12 side of the grommet main body 10 from the water surface 102 side of the mounting panel 100 and the main body portion 21 of the grommet inner 20 is fitted into the mounting hole 101 . In the grommet inner 20, the locking arm portion 22 is inserted into the mounting hole 101 from the water surface 102 side of the mounting panel 100 in a state in which the collar portion 23 is inserted into the groove portion 11C of the main body portion 11 of the grommet main body 10. It hooks on the edge of the mounting hole 101 on the locking surface 103 side. As a result, the grommet inner 20 is attached to the attachment hole 101 of the attachment panel 100 together with the grommet body 10 . The grommet body 10 has a water cutoff portion 11A that contacts the water surface 102, thereby ensuring water cutoff performance.

Details of the locking arm portion 22 will be described below. The locking arm portion 22 includes an elastic portion 22A and a locking claw 22B, and is integrated with the body portion 21 of the grommet inner 20 and the like. Since a plurality of locking arm portions 22 are arranged around the axis C as described above, a plurality of elastic portions 22A and locking claws 22B configured in the locking arm portion 22 are also arranged around the axis C. placed.

The elastic portion 22A is provided in the body portion 21 (the first member 21A and the second member 21B) so as to be elastically deformable along the radial direction intersecting the axis C. As shown in FIG. Specifically, the main body portion 21 of the grommet inner 20, on which the elastic portion 22A is provided, is arranged in a state in which the first member 21A and the second member 21B are fitted together, as shown in FIG. It includes a cylindrical inner peripheral wall 21C extending in the direction X and an outer peripheral wall 21D. The inner peripheral wall 21C and the outer peripheral wall 21D are spaced apart in the radial direction, are connected at one end in the axial direction X, and are open at the other end to form a space 21E therebetween. The flange 23 is provided at the other end of the outer peripheral wall 21D. A portion of the outer peripheral wall 21D of the elastic portion 22A is notched along the axial direction X with respect to the main body portion 21, so that one end side of the inner peripheral wall 21C and the outer peripheral wall 21D are connected to each other in the axial direction X. It is formed as a plate piece extending along the axial direction X with an end portion 22Aa. The elastic portion 22A is formed so that the base end portion 22Aa is bent back from one end side to the other end side of the inner peripheral wall 21C. Further, the elastic portion 22A has a tip portion 22Ab on the other end side in the axial direction X, and is directed toward the locked surface 103 in a state where the grommet inner 20 is fitted to the mounting panel 100 as shown in FIG. formed to protrude. With these configurations, the plate piece of the elastic portion 22A is elastically deformed in the radial direction that intersects the axis C with its own elastic force. It is provided so as to be relatively displaceable in the radial direction. That is, the elastic portion 22A can be displaced in the radial direction by being elastically deformed with elastic force while the inner peripheral wall 21C and the outer peripheral wall 21D are immovable.

The locking claw 22B is provided integrally with a distal end portion 22Ab extending along the axial direction X in the elastic portion 22A. A plurality of locking claws 22B are provided along the axial direction X at the distal end portion 22Ab of the elastic portion 22A that forms a plate piece. Further, as shown in FIG. 3, the locking claws 22B are provided in a plurality of stages so as to gradually approach the axis C toward the locked surface 103 when the grommet inner 20 is fitted to the mounting panel 100 . That is, in a state in which the grommet inner 20 is fitted to the mounting panel 100, the locking claw 22B is located radially outward of the distal end portion 22Ab of the elastic portion 22A so as to approach the locked surface 103 radially inward. , and each step is provided so as to be caught by the edge of the mounting hole 101 of the mounting panel 100 on the locked surface 103 side.

The locking arm portion 22 is formed such that the locking claw 22B protrudes radially outward from the elastic portion 22A, and the locking claw 22B farthest from the collar portion 23 projects radially outward the most. In the locking arm portion 22, an inclined surface 22C is formed between the locking claw 22B farthest from the collar portion 23 and the base end portion 22Aa of the elastic portion 22A.

In this manner, the locking arm portion 22 including the elastic portion 22A, the locking claw 22B, and the inclined surface 22C is formed in the grommet inner 20 so as to protrude toward the locked surface 103 of the mounting panel 100 .

When the grommet inner 20 is fitted into the mounting hole 101 of the mounting panel 100, the locking arm portion 22 configured in this way is first fitted to the mounting hole 101 from the water surface 102 side to the base end portion 22Aa side of the elastic portion 22A. is inserted into The locking arm portion 22 is elastically deformed radially inward while the elastic portion 22A exerts an elastic force radially outward by contacting the inner peripheral surface of the mounting hole 101 with the inclined surface 22C. The locking arm portion 22 is further inserted, and as shown in FIG. caught on the edge of At this time, the grommet body 10 is pressed until the water stop portion 11A is sufficiently in contact with the water-receiving surface 102 of the mounting panel 100, and depending on the amount of pressing, the locking arm portion 22 is moved to one of the locking claws 22B. is caught on the edge of the mounting hole 101 . Therefore, in the grommet 1, the grommet body 10 is pressed against the target water surface 102 until the water stop portion 11A is sufficiently in contact with the target water surface 102 and the water stop performance can be secured. Any one of the retaining claws 22B is appropriately hooked on the edge of the mounting hole 101, and the mounting hole 101 is mounted.

Here, when the step 103a is formed around the mounting hole 101 in the mounting panel 100, the water blocking portion 11A of the grommet 1 is in sufficient contact with the target water surface 102 in the same manner as described above, thereby improving the water blocking performance. The grommet body 10 is pressed against the water surface 102 until the At this time, the locking claw 22B close to the flange 23 is caught by the edge of the mounting hole 101 for the relatively low level difference 103a (103aa), and the locking arm part 22 for the relatively high level difference 103a (103ab). On the other hand, the locking claw 22B far from the flange 23 is caught on the edge of the mounting hole 101. As shown in FIG. The low level difference 103a (103aa) is the level difference 103a near the locked surface 103 from the target water surface 102, and is a portion where the plate thickness T1 of the mounting panel 100 is thin. A stepped portion 103a where the locked surface 103 is far from 102 is a portion where the plate thickness T2 of the mounting panel 100 is thick.

As described above, the grommet mounting structure 50 and the grommet 1 of the present embodiment have the elastic portion 22A in a state where the inner peripheral wall 21C and the outer peripheral wall 21D of the grommet inner 20 are fixed in the locking arm portion 22. Only itself is elastically deformed with elastic force and displaced in the radial direction. That is, when the grommet 1 is attached to the mounting hole 100, the grommet main body 10 is kept in contact with the target water surface 102 until the water stop portion 11A of the grommet body 10 is sufficiently in contact with the target water surface 102 to ensure the water stop performance. 102 is pressed. At this time, the grommet inner 20 is pushed toward the water surface 102 together with the grommet body 10 because the flange 23 provided on the outer peripheral wall 21D is inserted into the groove 11C of the grommet body 10 . On the other hand, the locking arm portion 22 is provided so that the elastic portion 22A can be displaced in the radial direction relative to the inner peripheral wall 21C and the outer peripheral wall 21D. Therefore, the locking arm portion 22 is configured such that the elastic portion 22A moves against the outer peripheral wall 21D as the outer peripheral wall 21D moves along the axial direction X for pressing the water stop portion 11A of the grommet body 10 against the target water surface 102. , and the locking claw 22B is caught by the edge of the mounting hole 101 according to the step 103a. At this time, one of the plurality of locking claws 22B of the locking arm portion 22 is selectively caught on the edge of the mounting hole 101 according to the position of the step 103a.

More specifically, due to the steps 103a, the plurality of locking arm portions 22 are locked at positions where the thickness of the mounting panel 100 differs depending on the locking position on the locked surface 103. . At this time, each locking arm portion 22 is positioned according to the thickness of the mounting panel 100, in other words, the position corresponding to the step 103a among the plurality of locking claws 22B aligned in the axial direction X. , the locking claw 22B is locked to the locked surface 103. As shown in FIG. Since the locking operation of the locking arm portion 22 is performed by elastically deforming the elastic portion 22A independently of the outer peripheral wall 21D as described above, this operation causes the outer peripheral wall 21D to Displacement of the distance to the water surface 102 to be covered can be suppressed. As a result, the plurality of locking arm portions 22 can prevent the grommet inner 20 and the grommet body 10 from tilting with respect to the axis C due to their own locking operation. Thus, the locking arm portion 22 locking operation of the present embodiment does not prevent the water stop portion 11A of the grommet body 10 from contacting the water surface 102 to be covered. Therefore, according to the grommet mounting structure 50 and the grommet 1 of the present embodiment, it is possible to secure the water stopping performance even if there is a step 103a having a partially different height around the mounting hole 101 .

As described above, the grommet mounting structure 50 of the present embodiment has one surface configured as the target water surface 102 and the other surface configured as the engaged surface 103 . grommet 1; The grommet 1 can stop water between the mounting panel 100 and the water surface 102, and the wiring material W that penetrates the mounting hole 101 is inserted along the axis C extending in the through direction of the mounting hole 101. A grommet body 10 that can be provided, and a grommet inner 20 that is fitted into a mounting hole 101 with the grommet body 10 attached. The grommet inner 20 includes an elastic portion 22A that is elastically deformable along a radial direction that intersects with the axis C, and an elastic portion 22A that is formed integrally with the locked surface 103 of the mounting panel 100. A plurality of locking arm portions 22 configured to include a plurality of locking claws 22B that can be locked to the edge of the mounting hole 101 and are provided along the extending direction of the axis C are provided around the axis C, One of the plurality of locking claws 22B of each of the plurality of locking arm portions 22 is locked to the edge of the mounting hole 101 according to the step 103a of the mounting panel 100 .

According to the grommet mounting structure 50 and the grommet 1, any of the plurality of locking claws 22B of the plurality of locking arms 22 can be locked to the edge of the mounting hole 101 according to the step 103a of the mounting panel 100. be done. Therefore, according to the grommet mounting structure 50 and the grommet 1 , the grommet inner 20 can be fitted into the mounting hole 101 , and the grommet body 10 can stop water between the grommet body 10 and the water covered surface 102 of the mounting panel 100 . As a result, according to the grommet mounting structure 50 and the grommet 1, even if there is a step 103a having a partially different height around the mounting hole 101, it is possible to ensure water stopping performance.

In addition, in the grommet mounting structure 50 and the grommet 1 of the present embodiment, the locking arm portion 22 of the grommet inner 20 is formed so as to protrude toward the locked surface 103 of the mounting panel 100, and the locking claw 22B is formed. are provided in a plurality of stages so as to gradually approach the axis C toward the locked surface 103 .

According to the grommet mounting structure 50 and the grommet 1 , the locking claws 22</b>B are arranged radially inward toward the locked surface 103 when the grommet inner 20 is fitted to the mounting panel 100 . is provided in a stepped manner. Therefore, according to the grommet mounting structure 50 and the grommet 1, in the process of inserting the grommet inner 20 with the grommet main body 10 mounted thereon into the mounting hole 101, each stage of the plurality of locking arms 22 is engaged. The locking claw 22B is hooked on the edge of the mounting hole 101 of the mounting panel 100 on the side of the locked surface 103 . As a result, according to the grommet mounting structure 50 and the grommet 1, the grommet inner 20 can be appropriately fitted into the mounting hole 101, and water stop performance can be ensured.

In addition, in the grommet mounting structure 50 and the grommet 1 of the present embodiment, the grommet body 10 includes the water stop portion 11A that can contact the water covered surface 102 of the mounting panel 100. It is formed in an annular shape around the surroundings and narrowed in a manner to approach the axis C toward the water surface 102 to be covered.

According to the grommet mounting structure 50 and the grommet 1, the water stop portion 11A is tilted inward by the pressing force against the water surface 102 to be prevented from floating from the water surface 102 to be covered. As a result, according to the grommet mounting structure 50 and the grommet 1, it is possible to maintain a uniform degree of close contact with the water surface 102 in the circumferential direction of the ring, and to ensure water stopping performance.

In addition, in the grommet mounting structure 50 and the grommet 1 of the above-described embodiment, the mounting panel 100 is formed so that the entire periphery of the mounting hole 101 of the water-receiving surface 102 is formed as the same flat surface. , but not limited to this. For example, the water surface 102 to be engaged may have irregularities formed by drawing the steps 103 a of the surface to be engaged 103 . Further, the water surface 102 to be engaged may be uneven due to the machining of the step 103a of the surface to be engaged 103 . Here, the grommet 1 of the present embodiment is formed such that the tip 11Aa of the water stop portion 11A faces radially inward. With this configuration, the grommet mounting structure 50 and the grommet 1, even if the water surface 102 has unevenness, the water cutoff portion 11A follows the unevenness and comes into close contact with the water surface 102, thereby improving the water cutoff performance. can be secured.

The grommet mounting structure 50 and the grommet 1 according to the embodiments of the present invention described above are not limited to the embodiments described above, and various modifications are possible within the scope of the claims. Also, the grommet mounting structure 50 and the grommet 1 according to the present embodiment may be configured by appropriately combining the constituent elements of the embodiments and modifications described above.

1 Grommet 10 Grommet main body 11A Water stop portion 20 Grommet inner 22 Locking arm portion 22A Elastic portion 22B Locking claw 50 Grommet mounting structure 100 Mounting panel 101 Mounting hole 102 Water surface 103 Surface to be locked 103a Step C Axis W Wiring material

Claims (4)

One surface is configured as a water surface to be engaged, and the other surface is configured as a surface to be engaged. a mounting panel in which a step is formed around the mounting hole on the stop surface;
A grommet which is provided so as to be able to stop water between the mounting panel and the water surface, and to allow a wiring member penetrating the mounting hole to be inserted along an axis extending in a penetrating direction of the mounting hole. the main body;
a grommet inner fitted into the mounting hole with the grommet main body attached;
with
The grommet inner is
an elastic portion that is elastically deformable along a radial direction that intersects with the axis; a plurality of locking arms around the axis, including a plurality of locking pawls provided along the extending direction of the axis;
The grommet mounting structure, wherein one of the plurality of locking claws of each of the plurality of locking arm portions is locked to an edge of the mounting hole according to the step of the mounting panel. The grommet inner is formed so that the locking arm portion can protrude toward the locked surface side of the mounting panel,
The locking claw is provided in a plurality of stages in a manner that gradually approaches the axis toward the locked surface,
The grommet mounting structure according to claim 1. The grommet body includes a water stop portion that can contact the water surface of the mounting panel,
The water stop portion is formed in an annular shape around the axis, and is formed so as to narrow toward the water surface to approach the axis.
The grommet mounting structure according to claim 1 or 2. One surface is configured as a water surface to be engaged, and the other surface is configured as a surface to be engaged. A wiring member that is capable of stopping water between the water-receiving surface of the mounting panel formed with a step around the mounting hole on the stop surface and that penetrates the mounting hole is extended in the penetrating direction of the mounting hole. a grommet body provided so as to be able to be inserted along an existing axis;
a grommet inner fitted into the mounting hole with the grommet main body attached;
with
The grommet inner is
an elastic portion that is elastically deformable along a radial direction that intersects with the axis; a plurality of locking arms around the axis, including a plurality of locking pawls provided along the extending direction of the axis;
In the grommet, one of the plurality of locking claws of each of the plurality of locking arm portions is locked to an edge of the mounting hole according to the step of the mounting panel.

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