JP2013090476A - Grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize both of an excellent water stop performance to a high-pressure water and a light weight in a grommet.SOLUTION: A water stop part 20 of a grommet 1 is constituted by a hard collar member 22 and a soft coating part 21. The hard collar member 22 is an annular plate-like member made of a material harder than an elastic material, surrounding a periphery of a cylindrical base part 10 made of the elastic material, and extending outward from the cylindrical base part 10. An inclined plate part 224 inclined from a bent part 225 between an inner edge 221 and an outer edge 222 to the outer edge 22 in a waterproof side direction is formed on the hard collar member 224. An annular depression 226 formed by the bent part 225 of the hard collar member 22 is not embedded. The soft coating part 21 made of the elastic material is formed to cover an entire region on a water splashing side and the outer edge 222 of the hard collar member 22, and has an annular standing part 212 standing in a waterproof side direction from the outer edge 222 of the hard collar member 22.

Description

  The present invention relates to a grommet that protects a wire harness that is passed through a through hole of a support body such as an automobile body.

  The grommet is made of a cylindrical elastic body through which a wire harness is passed, and is attached to a portion in which a through hole is formed in a support body such as an automobile body. The grommet protects the wire harness that is passed through the through hole of the support body, closes a gap between the through hole of the support body and the wire harness, and performs a water stop function and a dustproof function.

  In addition, as shown in Patent Document 1 or the like, the grommet may have an annular flange that protrudes outward from a cylindrical base portion in which an annular constriction is formed. The flange portion is formed integrally with the base portion, and the entire inner edge portion is continuous with the outer peripheral surface of the portion closer to one side in the axial direction of the base portion than the constriction portion of the base portion. Furthermore, a lip portion which is an annular portion standing on the other side in the axial direction of the base portion is formed on the outer edge portion of the flange portion.

  When the lip portion on the outer edge of the flange portion is in close contact with the support, the flange closes the gap between the edge of the through hole of the support and the grommet, and water, dust, or the like passes through the through hole of the support. It plays a role of preventing intrusion from the other side (watered side) to the other side (waterproof side).

  However, when high-pressure jet water from a high-pressure car wash device or the like is discharged to the grommets, particularly when the groin is discharged from a shallow angle with respect to the surface of the support that the buttock contacts, However, it is deformed by water pressure and turned up, and there is a risk that water may enter the waterproof side from the through hole of the support.

  The grommet shown in Patent Document 1 includes an annular resin member embedded in the inside of the collar in order to improve the water stopping performance of the collar against high pressure water. This resin member plays the role which improves the water stop performance with respect to high pressure water by making the collar part of a grommet contact | adhere to a plate-shaped support body in both the inner edge part and an outer edge part.

JP-A-8-140246

  By the way, in the grommet shown in Patent Document 1, the inner and outer edge portions of the buttock are supported by the elastic force of the resin member that is generated when the resin member held in a constantly bent state tries to return to its original shape. Increases adhesion to the body. Therefore, in order to further improve the water stopping performance against high-pressure water, it is necessary to increase the elastic force of the resin member. Further, the flange portion made of an elastic material and the portion connected to the inner edge portion of the flange portion in the cylindrical base are formed with a larger thickness so that the resin member can be held in a state of high elasticity. There is a need.

  Therefore, the grommet shown in Patent Document 1 has a property that the thickness of the cylindrical base portion and the collar portion made of an elastic material increases as the water stopping performance against high-pressure water is further improved. However, the grommet is required to achieve both excellent water stopping performance against high pressure water and light weight.

  An object of the present invention is to achieve both excellent water-stopping performance against high-pressure water and weight reduction in a grommet.

The grommet concerning the 1st invention is provided with each component shown below.
(1) The first component is a cylindrical portion made of an elastic material, and a soft cylindrical portion in which an annular constriction portion into which an edge portion of a through hole in a plate-like support is fitted is formed on the outer peripheral surface. It is.
(2) The second component is an annular and plate-like portion that is made of a material harder than the elastic material and surrounds the periphery of the soft tube portion and projects outward from the soft tube portion, and an inner edge portion is An annular shape that is fixed to a portion closer to the first side in the axial direction of the soft tube portion than the constricted portion in the soft tube portion, and surrounds the periphery of the soft tube portion at an intermediate portion between the inner edge portion and the outer edge portion It is a hard collar part in which the inclination board part which inclines to the 2nd side of the said axial direction from the bending part which makes the ridgeline to an outer edge part was formed. The annular depression formed on the second side surface by the bent portion of the rigid collar is not filled.
(3) The third component is an annular portion made of the elastic material formed integrally with the soft tube portion, the entire inner edge portion is connected to the outer peripheral surface of the soft tube portion, A soft covering portion formed so as to cover the entire region on the first side and the outer edge portion of the hard collar portion, and an annular standing portion standing from the outer edge portion of the hard collar portion to the second side. is there.

  The grommet according to the second invention is an example of the grommet according to the first invention. In the grommet according to the second aspect of the present invention, the annular inner edge portion fixed to the soft tube portion in the hard collar portion is formed upright to the second side along the axial direction.

  The grommet according to the third invention is an example of the grommet according to the first invention or the second invention. In the grommet concerning the 3rd invention, a plurality of slits which cut inward from an outer edge part are formed in the inclined board part of the hard collar part.

  The grommet according to the fourth invention is an example of the grommet according to any one of the first invention to the third invention. In the grommet according to the fourth aspect of the present invention, an annular groove surrounding the periphery of the soft tube portion is formed on the second side surface of the bent portion of the hard collar portion.

  In the grommet according to the first invention, the hard collar portion and the soft covering portion are water-stopping portions that block a gap between the edge portion of the through hole of the support and the soft cylindrical portion through which the wire harness is passed. Here, the hard brim portion functions as a skeleton of the water stop portion, and the soft covering portion functions as a lip portion that is in close contact with the outer skin and the support in the water stop portion.

  And the grommet which concerns on 1st invention WHEREIN: The inclination board part in a plate-shaped hard collar part inclines to the support body side. Therefore, when the water stop part composed of the hard collar part and the soft covering part is subjected to high water pressure, the hard collar part bends so as to press the rising part of the soft covering part in contact with the support more strongly against the support, Grommet waterstop is improved. Moreover, the force which presses an upright part to a support body by bending of a hard collar part becomes so large that the water pressure which a water stop part receives is high. Therefore, the grommet which concerns on 1st invention exhibits the outstanding water stop performance with respect to high pressure water.

  Moreover, since the grommet which concerns on 1st invention is equipped with the structure which improves the water stop performance using the received water pressure, the state where a hard collar part always exhibits strong elastic force, ie, the state which always has big elastic energy There is no need to hold on. Therefore, the soft cylindrical part (base part) and the soft covering part to which the inner edge part of the hard collar part is fixed do not need to be formed with a larger thickness. Moreover, even if the hard collar part made of a hard material is composed of a lightweight member formed with a relatively small thickness, it functions sufficiently as a skeleton of the water stop part.

  As described above, according to the grommet according to the first invention, it is possible to achieve both excellent water stopping performance against high pressure water and light weight.

  By the way, in the grommet which concerns on 1st invention, when the heel inner side part which is a part located between the constriction part and the inner edge part of a hard collar part in a soft cylindrical part is large, the force which the heel inner part applies from the outside There is a risk that the entire water stop portion composed of the hard collar portion and the soft covering portion may be lifted from the support.

  In the grommet according to the second invention, the annular inner edge portion fixed to the soft cylindrical portion of the hard collar portion is constricted along the axis of the soft cylindrical portion, that is, the edge of the through hole in the support body. It is formed upright to the part side. Therefore, the heel inner part of the soft cylindrical part becomes small, and such a small heel inner part is not easily deformed by an external force. As a result, the inconvenience that the entire water stop portion floats from the support due to the deformation of the inner side portion of the heel is avoided.

  Moreover, also in the grommet which concerns on 3rd invention, a hard collar part functions as a frame | skeleton which ensures the intensity | strength of a water stop part. Furthermore, in the hard collar part of the grommet according to the third invention, the inclined plate part is easily displaced to the support side because a plurality of slits are formed. Therefore, according to the 3rd invention, the effect | action which presses an upright part to a support body by the bending of a hard collar part is strengthened more, and the more outstanding water stop performance with respect to high pressure water is obtained.

  Moreover, also in the grommet which concerns on 4th invention, a hard collar part functions as a frame | skeleton which ensures the intensity | strength of a water stop part. Furthermore, in the hard collar portion of the grommet according to the third aspect of the invention, the inclined plate portion is located on the outer side from the bent portion in which the annular groove is formed, and thus is easily displaced to the support side. Therefore, according to the fourth aspect of the invention, the action of pressing the upright portion against the support by the bending of the hard collar portion is further strengthened, and a better water stop performance against high-pressure water can be obtained.

It is the front view, side view, and rear view of the grommet 1 which concerns on embodiment of this invention. 1 is a cross-sectional view of a grommet 1. FIG. 3 is a perspective view of a hard brim member 22 constituting the grommet 1. It is sectional drawing of the grommet 1 attached to the support body. It is a perspective view of 22 A of hard collar members which concern on the 1st application example applicable to the grommet 1. FIG. It is a perspective view of the rigid scissors member 22B which concerns on the 2nd application example applicable to the grommet 1. FIG. It is sectional drawing of the rigid scissors member 22B.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The following embodiment is an example embodying the present invention, and is not an example of limiting the technical scope of the present invention.

<Outline configuration>
First, a schematic configuration of the grommet 1 according to the embodiment of the present invention will be described with reference to FIGS. 1 and 2. The grommet 1 is a cylindrical member mainly made of an elastic material and through which a wire harness is passed, and is attached to a portion in which a through hole is formed in a plate-like support such as a body of an automobile. 1A is a front view of the grommet 1, FIG. 2B is a side view of the grommet 1, and FIG. 2C is a rear view of the grommet 1.

  As shown in FIGS. 1 and 2, the grommet 1 has a cylindrical base portion 10 and a water stop portion 20. Further, the cylindrical base 10 is constituted by a water-covered base 11, a waterproof side base 12 and a constricted part 13. Moreover, the water stop part 20 is comprised by the hard collar member 22 and the soft coating | coated part 21. FIG. In FIG. 1C, for the sake of convenience, a halftone dot pattern is attached to the rigid scissors member 22.

  In the grommet 1, the cylindrical base portion 10 and the soft covering portion 21 are members in which an elastic material is integrally formed. The cylindrical base portion 10 and the soft covering portion 21 are members made of an elastomer (elastic polymer) that is, for example, rubber or a rubber-based material. The elastomer includes vulcanized rubbers such as natural rubber and synthetic rubber, and thermosetting resin-based elastomers such as urethane rubber, silicone rubber and fluorine rubber.

  On the other hand, the rigid scissors member 22 is a bent plate-shaped member made of metal or resin. The hard brim member 22 is a member made of a metal such as stainless steel, iron or aluminum, or a thermoplastic resin such as polypropylene (PP) or polyamide (PA). That is, the hard rod member 22 is made of a material harder than the material (elastic material) of the cylindrical base portion 10 and the soft covering portion 21. The hard brim member 22 is integrated with the cylindrical base portion 10 and the soft covering portion 21 by insert molding.

  Subsequently, each component of the grommet 1 will be described with reference to FIGS. 1 to 4. 2 is a cross-sectional view of the grommet 1, FIG. 3 is a perspective view of the rigid brim member 22, and FIG. 4 is a cross-sectional view of the grommet 1 attached to the plate-like support 9.

<Cylindrical base>
The cylindrical base 10 is a cylindrical member that forms a through hole 14 through which a wire harness (not shown) is passed. In the cylindrical base portion 10, the cylindrical wet-side base portion 11 and the cylindrical waterproof side base portion 12 are formed on both sides of the constricted portion 13. In the present embodiment, each of the wetted base 11 and the waterproof base 12 has a bellows structure.

  The constricted portion 13 is a portion that is formed in an annular shape on the outer peripheral surface of the cylindrical base portion 10 and into which the edge portion 92 of the through hole 91 in the plate-like support 9 is fitted. The cylindrical base portion 10 made of an elastic material is inserted into the through hole 91 of the support 9 in a state of being compressed thinly. Further, the edge 92 of the through hole 91 in the support 9 is fitted into the constricted portion 13 while the compression of the cylindrical base 10 is released. The grommet 1 is attached to the support body 9 as described above.

  As described above, the cylindrical base portion 10 has a cylindrical shape made of an elastic material in which the annular constricted portion 13 into which the edge portion 92 of the through hole 91 in the plate-like support 9 is fitted is formed on the outer peripheral surface. Part. The cylindrical base portion 10 is an example of a soft cylindrical portion.

  As shown in FIG. 4, in a state where the grommet 1 is attached to the support 9, the water-side base 11 is located on one side of the support 9, and the waterproof side base 12 is on the other side of the support 9. Located in. The side on which the water-side base 11 is located with respect to the support 9 is a side where a large amount of moisture such as rain water or car wash water is expected to be generated. On the other hand, the side where the waterproof side base 12 is located with respect to the support body 9 is the side where a space where moisture intrusion is avoided, such as a trunk room or a living room of an automobile, is arranged.

  In the following description, for convenience, the side where the water-side base 11 is located with respect to the support 9 is referred to as the water-side, and the side where the waterproof-side base 12 is located is referred to as the waterproof side. In the coordinate axes shown in each figure, the X-axis direction is a direction along the axis Ct of the cylindrical base 10 (a direction parallel to the axis Ct), and the Y-axis direction and the Z-axis direction are the X-axis, respectively. The directions are orthogonal to each other and orthogonal to each other. In the following description, the direction toward the waterproof side (X-axis negative direction) is referred to as the waterproof side direction, and the direction toward the water-protected side (X-axis positive direction) is referred to as the water-protected direction.

<Water stop part>
The water stop 20 is an annular portion that surrounds the periphery of the tubular base 10 and projects outward from the tubular base 10. The water stop 20 closes a gap between the edge 92 of the through hole 91 of the support 9 and the cylindrical base 10 through which the wire harness is passed. In the state in which the grommet 1 is attached to the support body 9, the water stop portion 20 is located on the water receiving side with respect to the constricted portion 13, similarly to the water receiving base portion 11.

<Rigid saddle member>
The rigid brim member 22 constituting the water stop portion 20 is an annular and plate-like member that surrounds the periphery of the cylindrical base portion 10 and projects outward from the cylindrical base portion 10. The inner edge portion 221 of the rigid saddle member 22 is fixed to a portion closer to the wet side (closer to the X-axis positive direction side) in the axial direction Ct than the constricted portion 13 in the cylindrical base portion 10. In the following description, the portion of the cylindrical base 10 to which the inner edge portion 211 of the corrugated plate member 21 is fixed is referred to as a fixed portion 110.

  The inner edge portion 221 of the rigid brim member 22 is fixed to the fixing portion 110 of the cylindrical base portion 10 by an adhesive (not shown) or embedded in a part of the cylindrical base portion 10. In the present embodiment, the inner edge portion 221 of the rigid brim member 22 is fixed to the fixing portion 110 of the cylindrical base portion 10 with an adhesive (not shown). In addition, an adhesive agent is apply | coated to the surface of the hard gutter member 22 before insert molding.

  Further, in the grommet 1, an annular inner edge portion 221 fixed to the cylindrical base portion 10 in the rigid collar portion 22 is formed to stand up to the waterproof side direction (X-axis negative direction) side along the direction of the axis Ct. Has been. Therefore, in the hard collar portion 22, another bent portion having an angle of approximately 90 ° is formed between the inner edge portion 221 and a portion outside the inner edge portion 221 (a flat plate portion 223 described later).

  In the following description, the surface facing the waterproof side direction (X-axis negative direction) of the rigid scissors member 22 is referred to as a waterproof side surface, and the surface facing the water-affected side direction (X-axis positive direction) of the hard scissors member 22 is referred to as a water-protected side surface. .

  Further, the rigid saddle member 22 is formed with a bent portion 225 forming an annular ridge line surrounding the cylindrical base portion 10 at an intermediate portion between the inner edge portion 221 and the outer edge portion 222. The hard rod member 22 has a flat plate portion 223 and an inclined plate portion 224.

  The flat plate portion 223 is a flat plate portion that protrudes to the outside of the cylindrical base portion 10 between the inner edge portion 221 and the bent portion 225 of the hard brim member 22. On the other hand, the inclined plate portion 224 is a plate-like portion that is inclined from the bent portion 225 to the outer edge portion 222 in the rigid saddle member 22 toward the waterproof side direction (X-axis negative direction).

  In the present embodiment, the bent portion 225 is a bent portion that forms an obtuse angle on the waterproof side surface of the rigid brim member 22. However, it is also conceivable that the bent portion 225 is a curved portion that is curved toward the waterproof side surface of the rigid brim member 22.

  Further, as described later, the outer edge portion 222 of the hard collar portion 22 is covered with the soft covering portion 21. However, the annular recess 226 formed on the waterproof side surface (the surface facing the X-axis negative direction) by the bent portion 225 of the hard collar portion 22 is not filled with another member such as an elastic member. That is, the portion of the bent portion 225 on the waterproof side surface of the hard collar 22 is in an exposed state that is not covered with another member such as an elastic material.

  The exposed portion of the waterproof side surface of the hard collar portion 22 is a mold that supports the hard collar portion 22 when the cylindrical base portion 10 and the soft covering portion 21 are insert-molded using the hard collar portion 22 as an insert product. Is the part that contacts.

<Soft coating>
The soft covering portion 21 constituting the water blocking portion 20 is an annular portion made of an elastic material formed integrally with the cylindrical base portion 10. The soft covering portion 21 is formed such that the entire inner edge portion is continuous with the outer peripheral surface of the cylindrical base portion 10.

  Furthermore, the soft covering portion 21 is formed so as to cover the entire area of the wet side surface in the hard collar portion 22 and the outer edge portion 222 of the hard collar portion 22. A portion of the soft covering portion 21 that covers the entire wetted side surface of the hard brim portion 22 is referred to as an outer skin portion 211. Furthermore, an annular upright portion 212 erected from the outer edge portion 222 of the hard collar portion 22 toward the waterproof side direction (X-axis negative direction) from the outer edge portion 222 of the hard collar portion 22 at the portion covering the outer edge portion 222 of the hard collar portion 22 in the soft covering portion 21. Is formed.

  As shown in FIG. 4, in a state where the grommet 1 is attached to the support body 9, the upright portion 212 of the soft covering portion 21 is pressed against the support body 9 and comes into close contact with the support body 9. Thereby, the permeation of water from the wet side to the waterproof side is prevented.

<Effect>
In the grommet 1, the hard collar portion 22 and the soft covering portion 21 are water stop portions that block a gap between the edge portion 92 of the through hole 91 of the support 9 and the cylindrical base portion 10 through which the wire harness is passed. Here, the hard brim portion 22 functions as a skeleton of the water stop portion, and the soft covering portion 21 functions as a lip portion that is in close contact with the outer skin and the support 9 in the water stop portion.

  And in the grommet 1, the inclination board part 224 in the plate-shaped hard collar part 22 inclines to the support body 9 side. Therefore, when the water stop part 20 which consists of the hard collar part 22 and the soft coating | coated part 21 receives high water pressure as shown by F1 in FIG. 4, the soft collar | cover part 21 which the hard collar part 22 touches the support body 9 is shown. The standing portion 212 of the grommet 1 is bent so as to be pressed more strongly against the support 9, and the water-stopping property of the grommet 1 is improved. Moreover, the force which presses the standing part 212 to the support body 9 by the bending of the hard collar part 22 increases as the water pressure received by the water stop part 20 increases. Therefore, the grommet 1 exhibits excellent water stopping performance against high pressure water.

  In addition, since the grommet 1 has a structure that improves the water stop performance by using the received water pressure, the hard brim portion 22 does not necessarily need to be held in a state of exerting a strong elastic force. Therefore, the fixing part 110 and the soft covering part 22 of the cylindrical base part 10 to which the inner edge part 221 of the hard collar part 22 is fixed need not be formed with a larger thickness. In addition, the hard brim member 22 made of a hard material functions sufficiently as a skeleton of the water stop portion 20 even if it is made of a lightweight member formed with a relatively small thickness.

  As described above, by adopting the grommet 1, it is possible to achieve both excellent water stopping performance against high pressure water and light weight.

  By the way, in the grommet 1, when the heel inner side part 111 which is a part located in the cylindrical base 10 between the constricted part 13 and the inner edge part 221 of the hard ridge part 22 is large, the heel inner part 111 is added from the outside. There is a risk that the entire water stop portion 20 composed of the hard brim portion 22 and the soft covering portion 21 may be lifted from the support body 9 due to deformation by force.

  However, in the grommet 1, the annular inner edge portion 221 fixed to the cylindrical base portion 10 in the hard collar portion 22 is constricted on the side of the constricted portion 13 along the direction of the axial center Ct (X-axis direction) of the cylindrical base portion 10. The support 9 is formed to stand up toward the edge 92 of the through hole 91. Therefore, the heel inner portion 111 of the cylindrical base portion 10 becomes small, and such a small heel inner portion 111 is not easily deformed by an external force. As a result, the inconvenience that the entire water stop 20 is lifted from the support 9 due to the deformation of the heel inner portion 111 is avoided.

<First application example of rigid saddle member>
Next, the rigid scissors member 22A according to a first application example applicable to the grommet 1 will be described with reference to FIG. FIG. 5 is a perspective view of a rigid scissor member 22A according to a first application example applicable to the grommet 1.

  As shown in FIG. 5, a plurality of slits 2241 that cut inwardly from the outer edge portion 222 are formed in the inclined plate portion 224 of the rigid saddle member 22A. The hard saddle member 22A according to the first application example is different from the hard saddle member 22 shown in FIG. 3 only in that a slit 2241 is formed. 5, the same components as those shown in FIGS. 1 to 4 are given the same reference numerals.

  In the grommet 1, when the hard scissors member 22 </ b> A is employed instead of the hard scissors member 22, the hard scissors member 22 </ b> A functions as a skeleton that secures the strength of the water stop portion 20, and a plurality of slits 2241 are formed. The inclined plate portion 224 is easily displaced toward the support 9 side.

  Therefore, when the grommet 1 including the hard brim member 22A is employed, the action of pressing the upright portion 212 of the soft covering portion 21 against the support 9 by the bending of the hard brim portion 22A is further strengthened, and a better stop against high-pressure water is achieved. Water performance is obtained.

<Second application example of rigid saddle member>
Next, a rigid scissor member 22B according to a second application example applicable to the grommet 1 will be described with reference to FIGS. FIG. 6 is a perspective view of a rigid scissor member 22B according to a second application example applicable to the grommet 1. FIG. 7 is a cross-sectional view of the rigid saddle member 22B.

  As shown in FIGS. 6 and 7, an annular groove 2251 that surrounds the periphery of the cylindrical base 10 is formed on the waterproof side surface (the surface facing the negative direction of the X axis) of the bent portion 225 of the rigid flange portion 22B. Yes. The hard saddle member 22B according to the second application example is different from the hard saddle member 22 shown in FIG. 3 only in that an annular groove 2251 is formed. 6 and 7, the same components as those shown in FIGS. 1 to 4 are denoted by the same reference numerals.

  In the grommet 1, when the hard brim member 22 </ b> B is employed instead of the hard bridging member 22, the hard bridging member 22 </ b> A functions as a skeleton that ensures the strength of the water stop portion 20, and the annular groove 2251 is formed. The outer inclined plate portion 224 is easily displaced from the bent portion 225 to the support 9 side.

  Therefore, when the grommet 1 including the hard brim member 22B is adopted, the action of pressing the upright portion 212 of the soft covering portion 21 against the support 9 by the bending of the hard brim portion 22B is further strengthened, and a better stop against high-pressure water is achieved. Water performance is obtained.

<Others>
It is also conceivable that the hard gutter member 22 of the grommet 1 includes both of the plurality of slits 2241 provided in the hard gutter member 22A and the annular groove 2251 provided in the hard gutter member 22B. Moreover, in the example shown by each figure, the outline shape of the cross section of the cylindrical base 10 and the water stop part 20 is circular. However, it is also conceivable that the contour shapes of the cross sections of the cylindrical base 10 and the water stop 20 are other shapes such as an ellipse or a polygon.

DESCRIPTION OF SYMBOLS 1 Grommet 9 Support body 10 Cylindrical base part 11 Substrate side base part 12 Waterproof side base part 13 Constriction part 14 Through-hole 20 Water stop part 21 Soft covering part 22, 22A, 22B Hard brim member 91 Through-hole 92 of support body Edge part 110 Fixed part 111 Inner side part 211 Outer skin part 212 Standing part 221 Inner edge part of the rigid saddle member 222 Outer edge part of the rigid saddle member 223 Flat plate part of the rigid saddle member 224 Inclined plate part of the rigid saddle member 225 Bending of the rigid saddle member Part 226 dent 2241 slit 2251 groove

Claims (4)

A cylindrical portion made of an elastic material, and a soft cylindrical portion formed with an annular constriction portion into which an edge of a through-hole in a plate-like support is fitted on the outer peripheral surface;
It is made of a material harder than the elastic material and surrounds the periphery of the soft tube portion and is an annular and plate-like portion projecting outward from the soft tube portion, and an inner edge portion is more than the constricted portion in the soft tube portion Fixed to the first side portion in the axial direction of the soft tube portion, from the bent portion forming the annular ridge line surrounding the soft tube portion at the intermediate portion between the inner edge portion and the outer edge portion, to the outer edge portion A hard collar portion formed with an inclined plate portion inclined to the second side in the axial direction;
An annular portion made of the elastic material integrally formed with the soft tube portion, the entire inner edge portion is connected to the outer peripheral surface of the soft tube portion, the entire region on the first side of the hard collar portion and the A soft covering part formed so as to cover the outer edge part of the hard collar part, and formed with an annular standing part standing from the outer edge part of the hard collar part to the second side,
The grommet characterized in that the annular recess formed on the second side surface by the bent portion of the hard collar portion is not filled.   2. The grommet according to claim 1, wherein an annular inner edge portion fixed to the soft cylindrical portion in the hard collar portion is formed to rise to the second side along the axial direction.   The grommet according to claim 1 or 2, wherein a plurality of slits that cut inwardly from an outer edge portion are formed in the inclined plate portion of the hard collar portion.   The grommet according to any one of claims 1 to 3, wherein an annular groove surrounding the periphery of the soft cylindrical portion is formed on a surface on the second side in the bent portion of the hard collar portion.

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