JP2021016286A - Grommet - Google Patents

Abstract

To provide a grommet capable of enhancing workability.SOLUTION: A grommet 10 has a body part 11 attached to a through hole of a vehicle panel, and a cylindrical part 12 extending from the body part 11. The body part 11 is provided with a flange part 31 a diameter of which is larger than the cylindrical part 12, and a fitting groove 32 receding radially inward on an outer circumferential surface of the flange part 31 and fit to the through hole. The flange part 31 has a first flange part 41 sandwiching the fitting groove 32 and positioning on the cylindrical part 12 side, and a second flange part 42 sandwiching the fitting groove 32 and positioning on the side opposite to the cylindrical part 12. An outer surface 41a of the first flange part 41 has a plurality of ribs 51, 52, 53, 54, and 55 in a circumferential direction. The plurality of ribs 51, 52, 53, 54, and 55 differs in size depending on the positions.SELECTED DRAWING: Figure 2

Description

The present invention relates to grommets.

Conventionally, there is a grommet that is attached to a through hole provided in a vehicle panel that separates the interior and the outside and protects an electric wire inserted through the through hole (see, for example, Patent Document 1). Such a grommet has a main body portion mounted in the through hole and a tubular portion having an insertion hole through which an electric wire is inserted. The main body portion has a flange portion whose diameter is larger than that of the tubular portion, and a fitting groove provided on the outer peripheral surface of the flange portion and fitted and mounted in the through hole. Here, when the fitting groove is fitted to the through hole, a frictional force is generated between the flange portion and the through hole because the flange portion larger than the through hole is overcome. At this time, when the flange portion and the through hole come into contact with each other on the entire circumference, a large frictional force is generated, which makes mounting difficult. Therefore, in the grommet of Patent Document 1, a plurality of ribs are provided on the outer peripheral surface of the flange portion to suppress the frictional force generated between the grommet and the through hole.

Japanese Unexamined Patent Publication No. 2015-15868

By the way, in the grommet as described above, for example, in the case of a straight-shaped tubular portion extending in the assembling direction with the through hole, the operator grasps and pulls the tubular portion to form a plurality of ribs. It is easy for the load to act evenly. For this reason, when the grommet is attached to the through hole, the ribs are overcome at almost the same time, so that the semi-inserted state is unlikely to occur. However, for example, in a grommet having tubular portions that intersect in the assembling direction, it is difficult to carry out the pulling operation as described above, and there is a possibility that the load does not act evenly on the plurality of ribs. In this case, the operator may have an illusion that the installation is completed when a part of the ribs is overcome, resulting in a semi-inserted state. That is, there is room for improvement in terms of workability.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a grommet capable of improving workability.

The grommet of the present disclosure has a main body portion attached to a through hole of a vehicle panel and a tubular portion extending from the main body portion, and the main body portion includes a flange portion having a diameter larger than that of the tubular portion. The first flange portion is provided with a fitting groove that is recessed inward in the radial direction on the outer peripheral surface of the flange portion and is fitted into the through hole, and the flange portion is located on the tubular portion side with the fitting groove interposed therebetween. It has a flange portion and a second flange portion located on the side opposite to the tubular portion with the fitting groove interposed therebetween, and has a plurality of ribs in the circumferential direction on the outer surface of the first flange portion. The size of the plurality of ribs varies depending on the position.

Further, the grommet of the present disclosure has a main body portion attached to a through hole of a vehicle panel and a tubular portion extending from the main body portion, and the main body portion has a flange portion having a diameter larger than that of the tubular portion. And a fitting groove that is recessed inward in the radial direction on the outer peripheral surface of the flange portion and is fitted into the through hole, and the flange portion is located on the tubular portion side with the fitting groove interposed therebetween. It has a first flange portion and a second flange portion located on the side opposite to the tubular portion with the fitting groove interposed therebetween, and the outer surface of the first flange portion has a plurality of ribs in the circumferential direction. The size of the plurality of ribs is set to be smaller from the position where the vehicle panel is easily entered into the through hole to the position where it is difficult to enter.

According to the grommet of the present invention, workability can be improved.

FIG. 1 is a perspective view of the grommet in one embodiment. FIG. 2 is a side view of the grommet in the same embodiment. FIG. 3 is a top view of the grommet in the same embodiment. FIG. 4 is a cross-sectional view of the grommet and the vehicle panel in the same embodiment. FIG. 5 is a partially enlarged view of the grommet in the same embodiment. FIG. 6 is a partially enlarged view of the grommet in the same embodiment. FIG. 7 is a front view of the grommet in the modified example. FIG. 8 is a rear view of the grommet in the modified example. FIG. 9 is a partially enlarged view of the grommet in the modified example. FIG. 10 is a partially enlarged view of the grommet in the modified example.

[Explanation of Embodiments of the present disclosure]
First, the embodiments of the present disclosure will be listed and described.
The grommet of this disclosure is
[1] It has a main body portion attached to a through hole of a vehicle panel and a tubular portion extending from the main body portion, and the main body portion has a flange portion having a diameter larger than that of the tubular portion and the flange portion. The flange portion is provided with a fitting groove that is recessed inward in the radial direction on the outer peripheral surface of the above and is fitted into the through hole, and the flange portion is a first flange portion located on the tubular portion side with the fitting groove interposed therebetween. The outer surface of the first flange portion has a plurality of ribs in the circumferential direction, and the plurality of ribs are provided on the outer surface of the first flange portion. The ribs vary in size depending on their position.

According to the above aspect, by varying the sizes of the plurality of ribs provided on the outer surface of the first flange portion according to their positions, the plurality of ribs of the first flange portion can be simultaneously mounted on the through hole. You can get over it. As a result, it is possible to prevent the semi-inserted state caused by the operator's illusion that the installation is completed when the ribs are over a part of the ribs, and the workability can be improved.

[2] It is preferable that the plurality of ribs have different sizes by changing the amount of protrusion of the flange portion from the outer surface. According to this aspect, the size of each rib is made different by changing the amount of protrusion from the outer surface of the flange portion so that the plurality of ribs of the first flange portion can be overcome at the same time when mounted in the through hole. it can.

[3] It is preferable that the protrusion amount of the plurality of ribs is changed by changing the radius of curvature. According to this aspect, the size of each rib can be made different by changing the amount of protrusion by changing the radius of curvature of the rib.

[4] It is preferable that the plurality of ribs have different sizes due to differences in width. According to this aspect, the sizes can be made different due to the difference in the width of the plurality of ribs so that the plurality of ribs of the first flange portion can be overcome at the same time when mounted in the through hole.

[5] It is preferable that the plurality of ribs have different sizes due to differences in height. According to this aspect, the sizes can be made different due to the difference in height of the plurality of ribs so that the plurality of ribs of the first flange portion can be overcome at the same time when mounted in the through hole.

[6] The flange portion preferably projects in an oval shape with respect to the tubular portion. According to this aspect, since the flange portion projects in an oval shape with respect to the tubular portion, it is difficult for the contact surface with respect to the through hole to be uniform in the longitudinal direction and the lateral direction of the flange portion, and the flange portion is deformed. The amount will also be different. In such a configuration, by making the rib sizes different as described above, it is possible to get over a plurality of ribs of the first flange portion at the same time when mounting the ribs in the through holes.

[7] The tubular portion includes a first tubular portion extending from the main body portion, a second tubular portion extending in a direction intersecting the extending direction from the extending direction tip portion of the first tubular portion, and a second tubular portion. The extension direction of the second cylinder portion coincides with the longitudinal direction of the flange portion, and among the plurality of ribs, the rib facing the second cylinder portion is on the opposite side in the circumferential direction. It is preferably larger than the rib on which it is located. According to this aspect, the rib facing the second cylinder portion extending in the direction corresponding to the longitudinal direction of the flange portion is larger than the rib located on the opposite side in the circumferential direction. Here, it is assumed that the operator naturally grips the second cylinder portion and carries out the mounting work by extending the second cylinder portion in the direction corresponding to the longitudinal direction of the flange portion. Therefore, the rib facing the second cylinder portion is most easily moved during the mounting work and easily enters the through hole. Therefore, by making the rib larger than the rib on the opposite side, for example, the situation where only the rib easily enters the through hole is hindered, and when mounting the rib in the through hole, the plurality of ribs of the first flange portion are simultaneously overcome. it can.

[8] Among the plurality of ribs, the rib facing the second cylinder portion is preferably connected to the outer peripheral surface of the first cylinder portion and the outer peripheral surface of the second cylinder portion. According to this aspect, the rib facing the second cylinder portion among the plurality of ribs is connected to the outer peripheral surface of the first cylinder portion and the outer peripheral surface of the second cylinder portion, so that the rib faces the second cylinder portion. The ribs to be used are the easiest to move during the mounting work and are more likely to enter the through hole. However, by making the rib larger than the rib on the opposite side, for example, the situation where only the rib is likely to enter the through hole is hindered and penetrated. It is possible to get over a plurality of ribs of the first flange portion at the same time when mounting the holes.

In addition, the grommet of this disclosure is
[9] A main body portion attached to a through hole of a vehicle panel and a tubular portion extending from the main body portion are provided, and the main body portion has a flange portion having a diameter larger than that of the tubular portion and the flange portion. The flange portion is provided with a fitting groove which is recessed inward in the radial direction on the outer peripheral surface of the above and is fitted into the through hole, and the flange portion is a first flange portion located on the tubular portion side with the fitting groove interposed therebetween. The outer surface of the first flange portion has a plurality of ribs in the circumferential direction, and the plurality of ribs are provided on the outer surface of the first flange portion. The size of the rib is set small from the position where it is easy to enter the through hole of the vehicle panel to the position where it is difficult to enter.

According to this aspect, by setting the size small from the position where it is easy to enter the through hole of the vehicle panel to the position where it is difficult to enter, the plurality of ribs of the first flange portion can be overcome at the same time when mounting the through hole. Can be done. As a result, it is possible to prevent the semi-inserted state caused by the operator's illusion that the installation is completed when the ribs are over a part of the ribs, and the workability can be improved.

[10] It is preferable that the insertion force required for mounting on the through hole is 50 N or more. According to this aspect, in a grommet having an insertion force of 50 N or more when attaching the grommet to the through hole, by adopting the above-described configuration, the grommet is operated by using a relatively large force during the operation. Can improve sex.

[Details of Embodiments of the present disclosure]
Hereinafter, specific examples of grommets will be described with reference to the drawings below. It should be noted that the present invention is not limited to these examples, and is indicated by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

As shown in FIG. 4, the grommet 10 is attached to a through hole Pa formed in a vehicle panel P that separates the interior and the outside of an automobile, and protects a wire harness that is passed through the through hole Pa. The grommet 10 also plays a role of ensuring water stoppage in the through hole Pa of the vehicle panel P. The wire harness contains at least one wire. Further, the wire harness may include a connector or the like inside the grommet 10.

As shown in FIGS. 1 and 4, the grommet 10 has a main body portion 11 mounted on the through hole Pa and a tubular portion 12 extending from the main body portion 11. The grommet 10 is integrally formed of a soft material such as rubber or elastomer.

As shown in FIGS. 1 to 4, the tubular portion 12 has a first tubular portion 21 and a second tubular portion 22. The first tubular portion 21 is formed so as to extend from the main body portion 11. The second tubular portion 22 extends from the tip end portion of the first tubular portion 21 in a direction intersecting the extending direction of the first tubular portion 21. More specifically, the second cylinder portion 22 and the first cylinder portion 21 extend in a direction orthogonal to each other. That is, the tubular portion 12 extends in a substantially L shape at the first tubular portion 21 and the second tubular portion 22. The tubular portion 12 has a through hole 23 that communicates the first tubular portion 21 and the second tubular portion 22. The through hole 23 is formed in an L shape along the first tubular portion 21 and the second tubular portion 22.

As shown in FIGS. 1 and 2, the tubular portion 12 has a grip portion 24 at a position straddling both sides of the outer peripheral surface 21a of the first tubular portion 21 and the outer peripheral surface 22a of the second tubular portion 22. The grip portion 24 is such that, for example, when the grommet 10 is attached to the through hole Pa, the operator grips the grommet 10 to facilitate the attachment.

As shown in FIG. 4, the main body portion 11 is fitted to the flange portion 31 having a diameter larger than that of the tubular portion 12 and to be recessed inward in the radial direction on the outer peripheral surface 31a of the flange portion 31 and fitted into the through hole Pa. A groove 32 is provided.

The fitting groove 32 is elastically brought into close contact with the inner peripheral surface of the through hole Pa in a state where the grommet 10 is attached to the through hole Pa of the vehicle panel P.
As shown in FIG. 4, the flange portion 31 is configured to have a hollow dome shape inside. The flange portion 31 accommodates an inner tubular portion 33 that communicates with the through hole 23 of the tubular portion 12. The inner tubular portion 33 has a through hole 33a that communicates with the through hole 23 of the tubular portion 12.

As shown in FIGS. 1 to 3, the flange portion 31 is configured to project in an oval shape with respect to the tubular portion. The longitudinal direction of the flange portion 31 coincides with the longitudinal direction of the second tubular portion 22.
The flange portion 31 has a first flange portion 41 located on the cylinder portion 12 side of the fitting groove 32, and a second flange portion 42 located on the side opposite to the cylinder portion 12 of the fitting groove 32. In this example, for example, one of the first flange portion 41 and the second flange portion 42 is arranged outside the vehicle interior, and the other of the first flange portion 41 and the second flange portion 42 is arranged inside the vehicle interior.

The second flange portion 42 is formed to have a larger external dimension than the first flange portion 41.
The first flange portion 41 has a plurality of ribs 51, 52, 53, 54, 55 in the circumferential direction on the outer surface 41a thereof.

The ribs 51, 52, 53, 54, 55 include a first rib 51, a second rib 52, a third rib 53, a fourth rib 54, and a fifth rib 55.
As shown in FIGS. 1, 2 and 4, the first rib 51 is provided at a position facing the second tubular portion 22. The first rib 51 has a first flat surface portion 51a, a second flat surface portion 51b, and a curved surface portion 51c. The first flat surface portion 51a is located relatively on the tubular portion 12 side and has an inclined surface that is inclined with respect to the extending directions of the first tubular portion 21 and the second tubular portion 22. The second flat surface portion 51b is located relatively far from the tubular portion 12, and is an inclined surface that is inclined with respect to the extending directions of the first tubular portion 21 and the second tubular portion 22. The curved surface portion 51c has a curved surface shape that connects the first flat surface portion 51a and the second flat surface portion 51b. The curved surface portion 51c is configured to form a protrusion toward the outer side in the radial direction of the first flange portion 41. Further, the widths of the first flat surface portion 51a, the second flat surface portion 51b, and the curved surface portion 51c are the same. The first flat surface portion 51a extends to the outer peripheral surface 22a of the second tubular portion 22 and is connected to the second tubular portion 22.

As shown in FIG. 2, the second rib 52 is a pair of ribs provided on both sides of the first rib 51 in the circumferential direction. The second rib 52 has a first flat surface portion 52a, a second flat surface portion 52b, and a curved surface portion 52c. The first flat surface portion 52a is located relatively on the tubular portion 12 side and has an inclined surface that is inclined with respect to the extending directions of the first tubular portion 21 and the second tubular portion 22. The second flat surface portion 52b is located relatively far from the tubular portion 12, and is an inclined surface that is inclined with respect to the extending directions of the first tubular portion 21 and the second tubular portion 22. The curved surface portion 52c has a curved surface shape that connects the first flat surface portion 52a and the second flat surface portion 52b. The curved surface portion 52c is configured to form a protrusion toward the outer side in the radial direction of the first flange portion 41. The widths of the first flat surface portion 52a, the second flat surface portion 52b, and the curved surface portion 52c are the same. The first flat surface portion 52a extends to an end surface 41b facing the tubular portion 12 side, which is a part of the outer surface 41a of the first flange portion 41.

As shown in FIGS. 2 and 3, the third rib 53 is a pair of ribs that are adjacent to the pair of second ribs 52 at predetermined intervals in the circumferential direction. The third rib 53 is located on the side opposite to the first rib 51 in the circumferential direction with respect to the pair of second ribs 52. Further, the pair of third ribs 53 are provided at positions displaced by 90 ° in the circumferential direction from the first rib 51. The third rib 53 has a first flat surface portion 53a, a second flat surface portion 53b, and a curved surface portion 53c. The first flat surface portion 53a is located relatively on the tubular portion 12 side and has an inclined surface that is inclined with respect to the extending directions of the first tubular portion 21 and the second tubular portion 22. The second flat surface portion 53b is located relatively far from the tubular portion 12, and is an inclined surface that is inclined with respect to the extending directions of the first tubular portion 21 and the second tubular portion 22. The curved surface portion 53c has a curved surface shape that connects the first flat surface portion 53a and the second flat surface portion 53b. The curved surface portion 53c is configured to form a protrusion toward the outer side in the radial direction of the first flange portion 41. The widths of the first flat surface portion 53a, the second flat surface portion 53b, and the curved surface portion 53c are the same. The first flat surface portion 53a extends to the outer peripheral surface 21a of the first cylinder portion 21 and is connected to the first cylinder portion 21.

As shown in FIGS. 2 and 3, the fourth rib 54 is a pair of ribs that are adjacent to the pair of third ribs 53 at predetermined intervals in the circumferential direction. The fourth rib 54 is located on the side opposite to the second rib 52 in the circumferential direction with respect to the pair of third ribs 53. The fourth rib 54 has a first flat surface portion 54a, a second flat surface portion 54b, and a curved surface portion 54c. The first flat surface portion 54a is located relatively on the tubular portion 12 side and has an inclined surface that is inclined with respect to the extending directions of the first tubular portion 21 and the second tubular portion 22. The second flat surface portion 54b is located relatively far from the tubular portion 12, and is an inclined surface that is inclined with respect to the extending directions of the first tubular portion 21 and the second tubular portion 22. The curved surface portion 54c has a curved surface shape that connects the first flat surface portion 54a and the second flat surface portion 54b. The curved surface portion 54c is configured to form a protrusion toward the outer side in the radial direction of the first flange portion 41. The widths of the first flat surface portion 54a, the second flat surface portion 54b, and the curved surface portion 54c are the same. The first flat surface portion 54a extends to the outer peripheral surface 21a of the first cylinder portion 21 and is connected to the first cylinder portion 21.

As shown in FIGS. 2 and 3, the fifth rib 55 is provided between the pair of fourth ribs 54 in the circumferential direction. The fifth rib 55 is provided 180 ° opposite to the first rib 51 in the circumferential direction. The fifth rib 55 has a first flat surface portion 55a, a second flat surface portion 55b, and a curved surface portion 55c. The first flat surface portion 55a is located relatively on the tubular portion 12 side and has an inclined surface that is inclined with respect to the extending directions of the first tubular portion 21 and the second tubular portion 22. The second flat surface portion 55b is located relatively far from the tubular portion 12, and is an inclined surface that is inclined with respect to the extending directions of the first tubular portion 21 and the second tubular portion 22. The curved surface portion 55c has a curved surface shape that connects the first flat surface portion 55a and the second flat surface portion 55b. The curved surface portion 55c is configured to form a protrusion toward the outer side in the radial direction of the first flange portion 41. The widths of the first flat surface portion 55a, the second flat surface portion 55b, and the curved surface portion 55c are the same. The first flat surface portion 55a is connected to the grip portion 24.

The ribs 51, 52, 53 of the present embodiment are larger in size than the other ribs 54, 55. As an example of the "size" used here, it is the size of the protrusion amount with respect to the through hole Pa or the size of the sliding area with the through hole Pa. That is, when the rib size is large, it is easily caught in the through hole Pa and is difficult to insert, and when the rib size is small, it is difficult to be caught in the through hole Pa and easily inserted. Further, as another example of the "size", it is a size (height) with respect to the assembling direction to be assembled in the through hole Pa. That is, when the height of the rib is high, the rib hits the through hole Pa faster, and when the height of the rib is low, the rib hits the through hole Pa later. In this example, the ribs 51, 52, 53, 54, 55 have the same size (height) with respect to the assembly direction.

The ribs 51, 52, 53 of the present embodiment have a substantially larger amount of protrusion by making the radius of curvature of the curved surfaces 51c, 52c, 53c smaller than the radius of curvature of the curved surfaces 54c, 55c of the ribs 54, 55. ing. Here, the shapes of the first rib 51 and the fifth rib 55 will be described in detail with reference to FIGS. 5 and 6.

As shown in FIG. 5, in the first rib 51, the angle formed by the first flat surface portion 51a and the second flat surface portion 51b is set to θ1. As shown in FIG. 6, in the fifth rib 55, the angle formed by the first flat surface portion 55a and the second flat surface portion 55b is set to θ2. The angle θ1 and the angle θ2 are the same angle. At this time, the radius of curvature r1 of the curved surface portion 51c of the first rib 51 is smaller than the radius of curvature r2 of the curved surface portion 55c of the fifth rib 55. As a result, the curved surface portion 51c of the first rib 51 protrudes radially outward from the curved surface portion 55c of the fifth rib 55. The radius of curvature of the curved surfaces 52c and 53c of the second rib 52 and the third rib 53 is the same as the radius of curvature r1 of the curved surface portion 51c of the first rib 51. Similarly, the radius of curvature of the curved surface portion 54c of the fourth rib 54 is the same as the radius of curvature r2 of the curved surface portion 55c of the fifth rib 55.

The operation of this embodiment will be described.
The grommet 10 of the present embodiment has a plurality of ribs 51, 52, 53, 54, 55 in the circumferential direction on the outer surface 41a of the first flange portion 41. The ribs 51, 52, 53, 54, and 55 have an insertion force of 50 N or more when the grommet 10 is inserted into the through hole Pa during the attachment work to the vehicle panel P.

Further, the ribs 51, 52 and 53 are formed to be larger in size than the ribs 54 and 55 provided at different positions. Here, the tubular portion 12 of the grommet 10 of the present embodiment has a configuration in which the first tubular portion 21 and the second tubular portion 22 are bent in an L shape. When such a grommet 10 is attached to the through hole Pa of the vehicle panel P, it is easy to enter the through hole Pa from the side of the first rib 51 facing the second cylinder portion 22, and it is difficult for the fifth rib 55 side to enter the through hole Pa. Therefore, by making the ribs 51, 52, 53 larger than the ribs 54, 55, it is easy to enter the through hole Pa at the same time.

The effect of this embodiment will be described.
(1) By varying the sizes of the plurality of ribs 51, 52, 53, 54, 55 provided on the outer surface 41a of the first flange portion 41 according to their positions, the ribs 51, 52, 53, 54, 55 can be attached to the through hole Pa. A plurality of ribs 51, 52, 53, 54, 55 of one flange portion 41 can be overcome at the same time. As a result, it is possible to prevent the semi-inserted state caused by the operator's illusion that the installation is completed when the ribs are over a part of the ribs, and the workability can be improved.

(2) The sizes of the ribs 51, 52, 53, 54, and 55 are made different by changing the amount of protrusion of the first flange portion 41 from the outer surface 41a, and the first flange portion 41 is mounted on the through hole Pa. A plurality of ribs 51, 52, 53, 54, 55 of the flange portion 41 can be overcome at the same time.

(3) The amount of protrusion can be changed by changing the radius of curvature of the ribs 51, 52, 53, 54, 55 to make the sizes of the ribs 51, 52, 53, 54, 55 different.
(4) Since the flange portion 31 projects in an oval shape with respect to the tubular portion 12, it is difficult for the contact surface with respect to the through hole Pa to be uniform in the longitudinal direction and the lateral direction of the flange portion 31, and the flange portion 31 The amount of deformation of is also different. In such a configuration, the ribs 51, 52, 53, 54, 55 have different sizes as described above, so that when the ribs 51, 52, 53, 54, 55 are mounted in the through hole Pa, the plurality of ribs 51, 52, 53, of the first flange portion 41, It is possible to overcome 54 and 55 at the same time.

(5) The rib 51 facing the second tubular portion 22 extending in the direction corresponding to the longitudinal direction of the flange portion 31 is larger than the rib 55 located on the opposite side in the circumferential direction. Here, it is assumed that the second cylinder portion 22 extends in a direction that coincides with the longitudinal direction of the flange portion 31, so that the operator naturally grips the second cylinder portion 22 and performs the mounting work. Therefore, the rib 51 facing the second tubular portion 22 is most easily moved during the mounting work and easily enters the through hole Pa. Therefore, by making the rib 51 larger than the rib 55 on the opposite side, for example, the situation where only the rib 51 easily enters the through hole Pa is hindered, and when the rib 51 is mounted in the through hole Pa, a plurality of first flange portions 41 are formed. The ribs 51, 52, 53, 54, 55 can be overcome at the same time.

(6) Among the plurality of ribs 51, 52, 53, 54, 55, the rib 51 facing the second tubular portion 22 has an outer peripheral surface 21a of the first tubular portion 21 and an outer peripheral surface 22a of the second tubular portion 22. By being connected, the rib 51 facing the second cylinder portion 22 is most easily moved during the mounting work and is more likely to enter the through hole Pa, but the rib 51 is made larger than, for example, the rib 55 on the opposite side. As a result, it is possible to prevent the situation where only the rib 51 easily enters the through hole, and to overcome the plurality of ribs 51, 52, 53, 54, 55 of the first flange portion 41 at the same time when mounting the rib 51 in the through hole Pa.

(7) By setting the size of the vehicle panel P small from the position where it is easy to enter the through hole Pa to the position where it is difficult to enter, the plurality of ribs 51 of the first flange portion 41 when mounted on the through hole Pa, It is possible to overcome 52, 53, 54, 55 at the same time. As a result, it is possible to prevent the semi-inserted state caused by the operator's illusion that the installation is completed when the ribs are over a part of the ribs, and the workability can be improved.

(8) When the insertion force required for attaching the grommet 10 to the through hole Pa is 50 N or more, the grommet is attached by adopting the above-described configuration and using a relatively large force during the operation. Workability can be improved at 10.

The above embodiment can be modified and implemented as follows. The above embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

In the above embodiment, the radius of curvature of the curved surface portions 51c, 52c, 53c of the first rib 51, the second rib 52, and the third rib 53 is the same, and the curved surface portions 54c of the fourth rib 54 and the fifth rib 55. , 55c have the same radius of curvature, but are not limited to this.

For example, the radius of curvature of the curved surface portion 53c of the third rib 53 is made larger than the curved surface portions 51c and 52c of the first rib 51 and the second rib 52, and the curved surface portion 54c of the fourth rib 54 and the fifth rib 55. The radius of curvature may be smaller than, 55c. That is, the size (protrusion amount) of the third rib 53 may be smaller than that of the first rib 51 and the second rib 52 and larger than that of the fourth rib 54 and the fifth rib 55. As an example of the size of the third rib 53, for example, the size of the first rib 51 and the size of the fifth rib 55 may be exactly in the middle of the size. Of course, the size of the third rib 53 can be appropriately changed as long as it is smaller than, for example, the first rib 51 and larger than the fifth rib 55.

Further, the radius of curvature of the curved surface portion 53c of the third rib 53 is made larger than the curved surface portions 51c and 52c of the first rib 51 and the second rib 52, and the curved surface portion 54c of the fourth rib 54 and the fifth rib 55 is made larger. , 55c may have the same radius of curvature. That is, the size (protrusion amount) of the third rib 53 may be smaller than that of the first rib 51 and the second rib 52, and may be the same as that of the fourth rib 54 and the fifth rib 55.

Further, a configuration in which the radius of curvature is increased in the order of the curved surface portion 51c, the curved surface portion 52c, the curved surface portion 53c, the curved surface portion 54c, and the curved surface portion 55c may be adopted. That is, the size of the ribs may be reduced in the order of the first rib 51, the second rib 52, the third rib 53, the fourth rib 54, and the fifth rib 55. In other words, the sizes of the ribs 51, 52, 53, 54 and 55 may all be different.

The above-mentioned change example can be appropriately changed depending on the pull-out direction of the cylinder portion 12. For example, when the second cylinder portion 22 and the rib do not face each other, a configuration may be adopted in which the size of the rib is increased in order from the second cylinder portion 22.

Further, in the above-described embodiment and each modification, the size of the rib on the first rib 51 side is relatively increased and the size of the rib on the fifth rib 55 side is decreased, but these are relative to the through hole Pa. It can be changed as appropriate depending on whether or not the position is easy to enter. For example, when the third rib 53 is in a position where it can easily enter the through hole Pa, the third rib 53 is made the largest, and the rib size is gradually reduced in the order closer to the third rib 53. You may.

-In the above embodiment, as an example of changing the amount of protrusion of the flange portion 41 from the outer surface 41a in the radial direction, a configuration in which the radius of curvature is different is adopted, but the present invention is not limited to this. The radius of curvature may be the same between the ribs, but the amount of protrusion in the radial direction may be different between the ribs.

-In the above embodiment, the width of each rib 51, 52, 53, 54, 55 is fixed, but a configuration in which the width is changed may be adopted as an example of changing the size.
As shown in FIGS. 7 and 8, the through hole is formed by changing the frictional resistance between the first rib 51 and the through hole Pa by making the width W1 of the first rib 51 wider than the width W2 of the fifth rib 55. When mounted on Pa, it is possible to overcome a plurality of ribs of the first flange portion at the same time. The frictional resistance may be changed by changing the widths of the other ribs 52, 53, 54 in the same manner. In this case, the radius of curvature and the height of each rib 51, 52, 53, 54, 55 are the same.

-In the above embodiment, the sizes (heights) of the ribs 51, 52, 53, 54, 55 with respect to the assembling direction are the same, but as an example of changing the size, a configuration in which the height is changed is adopted. You may.

As shown in FIGS. 9 and 10, the height T1 which is the size of the first rib 51 in the assembling direction is made higher than the height T2 which is the size of the fifth rib 55 in the assembling direction. By making it difficult to get over a portion that is easy to enter, it is possible to get over a plurality of ribs of the first flange portion at the same time when mounting the through hole Pa. The heights of the other ribs 52, 53, 54 may be changed in the same manner. In this case, the radius of curvature and the width of each rib 51, 52, 53, 54, 55 are, for example, the same. Of course, this modification may be applied after different radius of curvature and width. In this case, a synergistic effect between the two can be expected.

In the above embodiment, the ribs 51, 52, 53, 54, 55 have curved surfaces between the first plane portions 51a, 52a, 53a, 54a, 55a and the second plane portions 51b, 52b, 53b, 54b, 55b. Although the portions 51c, 52c, 53c, 54c and 55c are used, the curved surface portions 51c, 52c, 53c, 54c and 55c may be omitted to form a pin angle shape.

-In the above embodiment, a configuration including a total of eight ribs 51, 52, 53, 54, 55 is adopted, but the number may be changed as appropriate.
-In the above embodiment, the flange portion 31 has an oval shape, but it may have a perfect circular shape or an elliptical shape.

-In the above embodiment, the longitudinal direction of the flange portion 31 and the extending direction of the second cylinder portion 22 are made to match, but these relationships can be changed as appropriate.
-The structure of the tubular portion 12 of the above embodiment is not particularly limited. At least one of the first tubular portion 21 and the second tubular portion 22 may have a shape having a bellows structure. Further, although the second cylinder portion 22 is configured to extend in a direction orthogonal to the first cylinder portion 21, the extension direction of the second cylinder portion is appropriately changed as long as it intersects with the first cylinder portion 21. You may.

10 Grommet 11 Main body 12 Cylinder 12a Through hole 21 1st cylinder 21a Outer peripheral surface 22 2nd tubular 22a Outer surface 23 Through hole 24 Grip 31 Flange 31a Outer surface 32 Fitting groove 33 Inner cylinder 33a Through hole 41 First flange portion 41a Outer surface 41b End face 42 Second flange portion 51, 52, 53, 54, 55 Ribs 51a, 52a, 53a, 54a, 55a First plane part 51b, 52b, 53b, 54b, 55b Second plane Part 51c, 52c, 53c, 54c, 55c Curved part P Vehicle panel Pa Through hole r1 Radius of curvature r2 Radius of curvature T1 Height T2 Height W1 Width W2 Width θ1 Angle θ2 Angle

Claims (10)

It has a main body that is attached to the through hole of the vehicle panel and a tubular part that extends from the main body.
The main body portion includes a flange portion whose diameter is larger than that of the tubular portion, and a fitting groove which is recessed inward in the radial direction on the outer peripheral surface of the flange portion and is fitted into the through hole.
The flange portion has a first flange portion located on the tubular portion side across the fitting groove and a second flange portion located on the opposite side of the tubular portion across the fitting groove. ,
The outer surface of the first flange portion has a plurality of ribs in the circumferential direction.
The plurality of ribs are grommets having different sizes depending on their positions. The grommet according to claim 1, wherein the plurality of ribs have different sizes by changing the amount of protrusion of the flange portion from the outer surface. The grommet according to claim 2, wherein the plurality of ribs change the amount of protrusion by changing the radius of curvature. The grommet according to claim 1, wherein the plurality of ribs have different sizes depending on the width. The grommet according to claim 1, wherein the plurality of ribs have different sizes depending on the height. The grommet according to any one of claims 1 to 5, wherein the flange portion projects in an oval shape with respect to the tubular portion. The tubular portion includes a first tubular portion extending from the main body portion and a second tubular portion extending in a direction intersecting the extending direction from the extending direction tip portion of the first tubular portion.
The extending direction of the second cylinder portion coincides with the longitudinal direction of the flange portion.
The grommet according to claim 6, wherein among the plurality of ribs, the rib facing the second tubular portion is larger than the rib located on the opposite side in the circumferential direction. The grommet according to claim 7, wherein the rib facing the second cylinder portion among the plurality of ribs is connected to the outer peripheral surface of the first cylinder portion and the outer peripheral surface of the second cylinder portion. It has a main body that is attached to the through hole of the vehicle panel and a tubular part that extends from the main body.
The main body portion includes a flange portion whose diameter is larger than that of the tubular portion, and a fitting groove which is recessed inward in the radial direction on the outer peripheral surface of the flange portion and is fitted into the through hole.
The flange portion has a first flange portion located on the tubular portion side across the fitting groove and a second flange portion located on the opposite side of the tubular portion across the fitting groove. ,
The outer surface of the first flange portion has a plurality of ribs in the circumferential direction.
The plurality of ribs are grommet whose size is set to be smaller from the position where the vehicle panel is easily inserted into the through hole to the position where it is difficult to enter. The grommet according to claim 9, wherein the insertion force required for mounting on the through hole is 50 N or more.