JP6831671B2 - Grommets and their manufacturing methods - Google Patents

Description

The present invention relates to, for example, a grommet that protects an electric wire inserted into a vehicle body panel and a method for manufacturing the grommet.

Conventionally, a grommet is attached to the panel opening in order to protect the electric wire inserted into the panel opening provided in the vehicle body panel (for example, the panel between the engine room and the vehicle interior).
This type of grommet includes a grommet body and an inner member. The inner member has an inner plate portion having an inner opening through which an electric wire is inserted, and a mounting portion to be attached to the panel opening is provided on one main surface of the inner plate portion, and the other main surface of the inner plate portion is provided. Is provided with a mounted portion on which the mounting portion of the grommet body is mounted. The mounting portion of the grommet body is mounted on the mounted portion of the inner member in a state of covering the entire inner plate portion.

As described above, the conventional grommet has a structure in which the mounting portion of the grommet body covers the entire inner plate portion (particularly the outer circumference of the inner plate portion), so that the inner plate portion has restrictions on the shape such as the outer peripheral shape. I was receiving it. Specifically, the inner plate portion is limited to a shape that does not easily damage the mounting portion of the grommet body (for example, a shape formed by a gentle curve such as a circle).

JP-A-2015-198529

Therefore, an object of the present invention is to provide a grommet and a method for manufacturing the grommet, which can improve the degree of freedom in the shape of the inner member.

The present invention is a grommet provided with a grommet main body attached to the outer periphery of an electric wire inserted through a panel opening of a vehicle body panel and an inner member attached to the panel opening while being attached to the grommet main body. The inner member is provided on one main surface of the inner plate portion having an inner opening through which the electric wire is inserted and the inner plate portion, and the inner opening is extended to the side of the one main surface. The grommet main body has a tubular mounting portion to be mounted on the panel opening, and the grommet main body has an inner circumference of the inner opening from the other main surface side of the inner plate in a state where the inner plate is exposed. It is characterized in that it is a grommet having a tubular mounting portion mounted on the.

As a method of exposing the inner plate portion, at least the outer peripheral end portion of one main surface (main surface on the vehicle body panel side), the other main surface (main surface on the grommet body side) and the outer peripheral end portion of the inner plate portion is used. Should be exposed.

According to the present invention, the mounting portion of the grommet main body is mounted on the inner circumference of the inner opening of the inner member with the inner plate portion exposed. That is, the mounting portion of the grommet body does not cover the inner plate portion. Therefore, restrictions on the shape of the inner plate portion can be reduced, and the degree of freedom can be improved.

The entire outer peripheral edge may be exposed. As a result, since there is no resin member or the like at the outer peripheral end portion during work, catching is suppressed when contacting with others.

Further, as an aspect of the present invention, an annular contact rib member surrounding the mounting portion may be provided on the one main surface of the inner plate portion.
According to the present invention, a contact rib member is interposed between the inner plate portion and the vehicle body panel in a state where the inner member is attached to the panel opening. As a result, waterproofness, dustproofness, soundproofing, and rattling prevention between the grommet and the vehicle body panel can be ensured.
If the contact rib member is made of a rubber member, the waterproofness, dustproofness, soundproofing, and rattling prevention between the grommet and the vehicle body panel can be further improved.

Further, as an aspect of the present invention, the grommet main body has a flange portion extending from the base end portion of the mounting portion to the outer peripheral side of the mounting portion and abutting with the other main surface of the inner member. May be good.
According to the present invention, the contact area between the grommet main body and the inner member can be increased by the flange portion. As a result, when the contact portion between the grommet main body and the inner member is joined, the joining area can be increased, and the grommet main body and the inner member can be firmly joined.

Further, the inner plate portion can be reinforced by the flange portion. As a result, when the inner member is attached to the panel opening, the inner plate can be strongly pressed against the in-vehicle panel by the flange, and the waterproofness, dustproof, soundproofing and rattling prevention between the grommet and the in-vehicle panel can be prevented. Can be improved.

Further, as an aspect of the present invention, the inner member is provided on the other main surface of the inner plate portion, and has a tubular mounted portion that extends the inner opening to the side of the other main surface. The mounting portion of the grommet body may be mounted on the inner circumference of the mounted portion.
In this configuration, since the attachment portion extends the inner opening, the inner circumference of the attachment portion is the inner circumference of the inner opening. Therefore, the mounting portion of the grommet body is mounted on the inner circumference of the inner opening by being mounted on the inner circumference of the attachment portion.

According to the present invention, the mounting portion is provided on the other main surface of the inner member, so that the mounting portion of the grommet body is inside the inner opening regardless of the thickness of the inner plate portion or the axial length of the mounting portion. It is possible to secure the axial length of the inner opening required for stable mounting.

Further, as an aspect of the present invention, the grommet main body has an outer peripheral contact portion that extends from the mounting portion onto the outer peripheral surface of the mounted portion of the inner plate portion and is in contact with the outer peripheral surface. You may.
According to the present invention, the contact area between the grommet main body and the inner member can be increased by the outer peripheral contact portion. As a result, when the contact portion between the grommet main body and the inner member is joined, the joining area can be increased, and the grommet main body and the inner member can be firmly joined.

Further, as an aspect of the present invention, the grommet main body extends from the tip end portion of the outer peripheral contact portion to the outer peripheral side of the outer peripheral contact portion, and the flange portion abuts on the other main surface of the inner plate portion. May have.
According to the present invention, the contact area between the grommet main body and the inner member can be increased by the flange portion. As a result, when the contact portion between the grommet main body and the inner member is joined, the joining area can be increased, and the grommet main body and the inner member can be firmly joined.

Further, the inner plate portion can be reinforced by the flange portion. As a result, when the inner member is attached to the panel opening, the inner plate can be strongly pressed against the in-vehicle panel by the flange, and the waterproofness, dustproof, soundproofing and rattling prevention between the grommet and the in-vehicle panel can be prevented. Can be improved.

Further, as an aspect of the present invention, the tip end portion of the mounting portion of the grommet body may extend to the tip end portion of the mounting portion.
According to the present invention, the mounting portion covers the peripheral edge on the tip end side of the inner peripheral surface of the mounting portion (that is, the portion of the inner peripheral surface where the electric wire strongly contacts). As a result, the electric wire can be protected from the peripheral edge on the tip end side of the inner peripheral surface of the mounting portion.

Further, as an aspect of the present invention, the grommet main body may have an extension portion extending from the tip end portion of the mounting portion to the outer peripheral surface of the mounting portion via the tip end portion of the mounting portion. ..
The extension portion may be formed in the entire circumferential direction of the outer peripheral surface of the mounting portion, or may be partially formed in the circumferential direction of the outer peripheral surface of the mounting portion.

According to the present invention, since the tip portion of the mounting portion is covered with the extending portion, it is possible to prevent the tip portion of the mounting portion from interfering with the peripheral member when the inner member is mounted on the panel opening. Further, since the extended portion is extended from the mounting portion, it can be formed together with the mounting portion, and the productivity of the grommet can be improved.

The extended portion may be extended to the base end portion of the outer peripheral surface of the mounting portion.
According to the present invention, in a state where the inner member is attached to the panel opening, an extension portion is interposed between the attachment portion of the inner member and the panel opening. As a result, the extension portion can improve the adhesion and preventability between the mounting portion and the panel opening, and can suppress rattling between the mounting portion and the panel opening. it can.

Further, as an aspect of the present invention, the grommet main body has an annular waterproof portion which is arranged in a state of surrounding the mounting portion on the one main surface of the inner plate portion and is connected to the tip end portion of the extending portion. You may.
According to the present invention, a waterproof portion is interposed between the inner plate portion and the vehicle body panel in a state where the inner member is attached to the panel opening. As a result, the prevention portion can ensure waterproofness, dustproofness, soundproofing, and rattling prevention between the inner plate portion and the vehicle body panel.
Further, since the waterproof portion is connected to the extension portion, it can be formed together with the extension portion, and the productivity of the grommet can be improved.

Further, as an aspect of the present invention, the thickness of the mounting portion of the grommet main body may be gradually reduced from the base end portion side to the tip end portion side of the mounting portion.

According to the present invention, it is possible to prevent the electric wire from being caught in the mounting portion when the electric wire is inserted into the grommet.

Further, as an aspect of the present invention, the height of the tip portion of the mounting portion of the grommet main body may differ depending on the position of the inner opening portion in the circumferential direction.
According to the present invention, the height of the tip of the mounting portion can be set to be the highest, for example, in the circumferential direction of the inner opening where the electric wires are unevenly distributed. As a result, the mounting portion can be effectively interposed between the inner peripheral surface of the inner opening and the electric wire, and the mounting portion prevents friction and rubbing between the inner peripheral surface of the inner opening and the electric wire. The electric wire can be effectively protected.

Further, as an aspect of the present invention, the thickness of the peripheral wall portion of the mounting portion of the grommet main body differs depending on the position of the inner opening in the circumferential direction.
According to the present invention, the thickness of the peripheral wall portion of the mounting portion can be made thickest, for example, in the circumferential direction of the inner opening where the electric wires are unevenly distributed. As a result, the thickness of the mounting portion can be effectively increased between the inner peripheral surface of the inner opening and the electric wire, and the mounting portion prevents friction and rubbing between the inner peripheral surface of the inner opening and the electric wire. The electric wire can be effectively protected.

Further, as an aspect of the present invention, the contact rib member is formed separately from the grommet main body and the inner member.
According to the present invention, the degree of freedom in the shapes of the contact rib member, the grommet body and the inner member can be improved. Further, the material of the contact rib member can be made different from the material of the grommet main body and the material of the inner member, and the selectivity of the material of the contact rib member can be improved.

Further, as an aspect of the present invention, an annular positioning groove portion for positioning the contact rib member is provided on the one main surface of the inner plate portion.
According to the present invention, the contact rib member can be fitted into the positioning groove portion to prevent the contact rib member from being displaced.

Further, as an aspect of the present invention, a positioning convex portion for positioning the contact rib member is adjacent to the inner peripheral side or the outer peripheral side of the contact rib member on the one main surface of the inner plate portion. It is provided.
According to the present invention, the positioning convex portion can prevent the abutting rib member from being displaced on one main surface of the inner plate portion.

Further, as an aspect of the present invention, a positioning convex portion for positioning the contact rib member is provided on the one main surface of the inner plate portion, and the positioning convex portion is provided on the bottom surface of the contact rib member. A fitting recess to be fitted may be formed, and the contact rib member may be formed on the positioning protrusion in a state where the fitting recess is fitted to the positioning protrusion.

According to the present invention, it is possible to prevent the abutting rib member from being displaced on one main surface of the inner plate portion by fitting the fitting concave portion and the positioning convex portion.

Further, as an aspect of the present invention, an extended contact rib portion may be provided on the inner or outer side of the contact rib member on the one main surface of the inner plate portion.

According to the present invention, when fitting the contact rib member to the inside or the outside of the extended contact rib portion, the contact rib member can be easily fitted to the inside or the outside of the extended contact rib portion by rotating the contact rib member. it can. Further, the extended contact rib portion is sandwiched between the inner plate portion and the vehicle body panel, and can contribute to waterproofness, dustproofness, soundproofing, and rattling prevention in cooperation with the contact rib member.

Further, as an aspect of the present invention, the contact rib members are formed in an annular shape having different sizes from each other, and include a plurality of annular rib portions arranged on the outer peripheral side of the mounting portion and arranged on the outer side in order of each other. You may.

According to the present invention, since the abutting rib member includes a plurality of annular rib portions, the waterproofness, dustproofing, soundproofing, and rattling prevention between the inner plate portion and the vehicle body panel can be further improved.

Further, as an aspect of the present invention, the mounting portion of the inner member is provided with a first through hole penetrating between the outer peripheral surface and the inner peripheral surface thereof, and the contact rib member is provided with the first penetrating portion. It may be formed integrally with the grommet body via a connecting portion through which a hole is inserted.
The connecting portion may connect the contact rib member and the mounting portion of the grommet body through the first through hole.

According to the present invention, since the abutting rib member can be fixed to the grommet main body via the connecting portion, it is possible to prevent the abutting rib member from being displaced on the inner plate portion. In addition, the contact rib member and the connecting portion can be formed in the step of forming the grommet main body, and the productivity can be improved. Further, the wiring route of the connecting portion connecting the grommet main body and the abutting rib member can be a short and simple route.

Further, as an aspect of the present invention, the inner plate portion is provided with a second through hole penetrating between the one main surface and the other main surface, and the contact rib member is formed with the second through hole. It may be formed integrally with the grommet main body via a connecting portion through which the grommet is inserted.
The connecting portion may connect the abutting rib member and the outer peripheral abutting portion or the fringe portion of the grommet body through the second through hole.

According to the present invention, in order to connect the contact rib member and the grommet main body by the connecting portion, it is possible to prevent the connecting portion from wrapping around the outer peripheral end portion of the inner plate portion, and the connecting portion is placed around the grommet. It is possible to prevent the peripheral member from being caught in the existing peripheral member.

Further, as an aspect of the present invention, the cross-sectional shape of the second through hole may change from the one main surface of the inner plate portion toward the other main surface.
The cross-sectional shape of the second through hole is a cross-sectional shape when the second through hole is cut along a surface parallel to the through hole opening surface of the second through hole.

Further, the cross-sectional shape of the second through hole may be gradually increased in diameter from one main surface of the inner plate portion toward the other main surface, or gradually contracted from one main surface of the inner plate portion toward the other main surface. The diameter may be gradually reduced from one main surface of the inner plate portion to the other main surface, and the diameter may be gradually increased from the middle to the other main surface, or one main surface of the inner plate portion. The diameter may be gradually increased from the surface to the other main surface, and the diameter may be gradually reduced from the middle to the other main surface.

According to the present invention, when the grommet main body and the contact rib member are injection-molded, the passing pressure of the molten resin passing through the second through hole can be set to a desired pressure.

Further, as an aspect of the present invention, the hole axial direction of the second through hole is inclined outward or inward in the radial direction of the inner opening from the one main surface of the inner plate portion toward the other main surface. You may.
According to the present invention, if the hole axis direction of the second through hole is inclined outward in the radial direction of the inner opening, it is easy to form the contact rib member in a shape inclined outward along the second through hole. On the contrary, when the hole axis direction of the second through hole is inclined inward in the radial direction of the inner opening, it becomes easy to form the contact rib member in a shape inclined inward along the second through hole. ..

Further, as an aspect of the present invention, the through hole opening surface on the one main surface side of the second through hole may be arranged on the inner peripheral side, the outer peripheral side, or directly below the contact rib member.
According to the present invention, when the through hole opening surface on the one main surface side of the through hole is arranged on the inner peripheral side of the contact rib member, the grommet body temporarily penetrates the second through hole on the other main surface side. When a flange portion having a diameter large enough to cover the hole opening surface is provided, the flange portion can be limited to the inner peripheral side of the contact rib member, thereby making the diameter of the flange portion as small as possible. can do.

Further, when the opening on the one main surface side of the second through hole is arranged on the outer peripheral side of the contact rib member, the inner opening is expanded to the vicinity of the contact rib member without interfering with the connecting portion. Can be diametered.
Further, when the opening on the one main surface side of the second through hole is provided directly under the contact rib member, the connecting portion is arranged on one main surface (main surface on the vehicle body panel side) of the inner plate portion. Since it can be prevented from being searched, the wiring of the connecting portion can be simplified.

Further, as an aspect of the present invention, the inner plate portion is provided with a second through hole penetrating between the one main surface and the other main surface, and the contact rib member is formed with the second through hole. The flange portion is connected to the flange portion via a connecting portion through which the flange portion is inserted, and the flange portion is formed in a convex shape in a plan view from the inner opening side toward the through hole opening surface of the second through hole. 2 It may have a convex portion that covers the through-hole opening surface of the through-hole.
According to the present invention, the range in which the flange portion covers the inner plate portion can be limited to the minimum necessary.

The present invention is a manufacturing method for manufacturing the above-mentioned grommet, in which one of the inner member and the grommet body is arranged in a mold for integrally forming the inner member and the grommet main body. The inner member and the other of the grommet body may be injection-molded by injecting the molten resin in the grommet body to join the mounting portion of the grommet body and the inner member.

In this manufacturing method, the molten resin may be injected into the mold with the inner member placed and the grommet body may be injection-molded, or the grommet body may be melted with the grommet body placed in the mold. The inner member may be injection-molded by injecting a resin.
With this configuration, the mounting portion of the grommet body and the mounting portion of the inner member can be joined without using an adhesive or the like.

According to the present invention, it is possible to provide a grommet and a method for manufacturing the grommet, which can improve the degree of freedom in the shape of the inner member.

The perspective view which shows the grommet and the body panel which concerns on 1st Embodiment. The perspective view which shows the grommet which concerns on 1st Embodiment. An exploded perspective view showing the grommet according to the first embodiment. FIG. 2 is a cross-sectional view taken along the line A1-A1 of FIG. A partially enlarged view of FIG. A partial cross-sectional view showing a state in which the grommet is attached to the vehicle body panel. (A) is a cross-sectional view showing a flange portion at the tip of the mounting portion of the grommet main body in the second modification of the first embodiment, and (b) is a cross-sectional view taken along the line 12-A12 of (a). (A) is a cross-sectional view showing a mounted portion of an inner member in the modified example 3 of the first embodiment, and (b) is a cross-sectional view of A4-A4 of (a). (A) is a cross-sectional view showing an outer peripheral contact portion of the grommet main body in the modified example 4 of the first embodiment, and (b) is a cross-sectional view of A5-A5 of (a). (A) is a cross-sectional view showing a flange portion at the tip of the mounting portion of the grommet body in the modified example 5 of the first embodiment, and (b) is a cross-sectional view taken along the line A6-A6 of (a). The cross-sectional view which shows the deformation example of the mounting part of the grommet body. FIG. 5 is a cross-sectional view showing another modification of the mounting portion of the grommet body. (A) is a cross-sectional view showing another modified example of the mounting portion of the grommet main body, and (b) is a cross-sectional view of A7-A7 of (a). FIG. 5 is a cross-sectional view showing another modification of the mounting portion of the grommet body. (A) is a cross-sectional view showing an extended portion of the grommet main body, and (b) is a cross-sectional view of A8-A8 of (a). The cross-sectional view which shows the deformation example of the extension part of the grommet body. FIG. 5 is a cross-sectional view showing another modification of the extension portion of the grommet body. (A) is a cross-sectional view showing an annular waterproof portion of the grommet body, and (b) is a cross-sectional view of A9-A9 of (a). The plan view which shows the modification of the positioning convex part. The plan view which shows another modification of the positioning convex part. FIG. 5 is a cross-sectional view showing another modification of the positioning convex portion. The plan view which shows the extended contact rib part. The plan view which shows the modification of the contact rib member. FIG. 23 is a cross-sectional view taken along the line A10-A10 of FIG. The cross-sectional view which shows the positioning groove of a contact rib member. The cross-sectional view which shows the mold which manufactures the grommet which concerns on 1st Embodiment. The plan view which shows the deformation example of the shape of the inner plate part. Sectional drawing which shows the grommet which provided the bellows part in the grommet body. (A) is a partial cross-sectional view showing the grommet according to the second embodiment, and (b) is a plan view of the grommet as viewed from the mounting portion side (that is, the vehicle body panel side). The cross-sectional view which shows the mold which manufactures the grommet which concerns on 2nd Embodiment. (A) is a plan view of the grommet according to the third embodiment as viewed from the mounting portion side (that is, the vehicle body panel side), and (b) is a partially enlarged view showing the region D of (a). FIG. 31 is a cross-sectional view taken along the line A11-A11 of FIG. The plan view which shows the flange part of FIG. 32. The cross-sectional view which shows the mold which manufactures the grommet which concerns on 3rd Embodiment. (A), (b), (c), and (d) are cross-sectional views showing another modified example of the cross-sectional shape of the through hole. (A) and (b) are cross-sectional views showing another modification of the through hole in the hole axial direction. (A) is a plan view showing a modified example of the relative arrangement of the through hole and the contact rib member, and (b) is a sectional view taken along the line A13-A13 of (a). (A) is a plan view showing another modification of the relative arrangement of the through hole and the contact rib member, and (b) is a sectional view taken along the line A14-A14 of (a). (A) is a plan view showing still another modified example of the relative arrangement of the through hole and the contact rib member, and (b) is a sectional view taken along the line A15-A15 of (a). The plan view which shows the deformation example of the flange part of the grommet body.

An embodiment of the present invention will be described below with reference to the drawings.
(First Embodiment)
The grommet 1 according to the first embodiment will be described with reference to FIGS. 1 to 6.
FIG. 1 is a perspective view showing the grommet 1 and the vehicle body panel 3 according to the first embodiment, FIG. 2 is a perspective view showing the grommet 1, and FIG. 3 is an exploded perspective view showing the grommet 1. 4 is a cross-sectional view of A1-A1 of FIG. 2, FIG. 5 is a partially enlarged view of FIG. 4, and FIG. 6 is a partial cross-sectional view showing a state in which the grommet 1 is attached to the vehicle body panel 3. is there.

As shown in FIG. 1, the grommet 1 according to the first embodiment is attached to a panel opening 3a provided in a vehicle body panel 3 mounted on a vehicle such as an automobile, and an electric wire W inserted through the panel opening 3a. It protects. The panel opening 3a is a portion of the vehicle body panel 3 that penetrates the main surfaces on both sides thereof. The electric wire W constitutes, for example, a wire harness.

As shown in FIGS. 2 to 5, the grommet 1 is attached to the grommet main body 4 mounted on the outer circumference of a plurality of electric wires W inserted into the panel opening 3a of the vehicle body panel 3 and to the grommet main body 4. An inner member 5 attached to the panel opening 3a and a contact rib member 6 arranged in the inner member 5 are provided.

The inner member 5 is made of a synthetic resin (for example, polypropylene resin). The inner member 5 includes an inner plate portion 51 and a mounting portion 53 provided on one main surface (that is, the main surface on the vehicle body panel side) 51b of the inner plate portion 51 and attached to the panel opening 3a.

The inner plate portion 51 is formed in a ring plate shape (for example, an annular plate shape), and a circular inner opening 51s through which a plurality of electric wires W are inserted is provided in the center thereof. The inner opening 51s is a portion of the inner plate 51 that penetrates between one main surface (that is, the main surface on the vehicle body panel side) 51b and the other main surface (that is, the main surface on the grommet body side) 51a. On one main surface 51b of the inner plate portion 51, a positioning convex portion 51c for positioning the contact rib member 6 is provided in a protruding shape.

The positioning convex portion 51c is formed in an annular shape along the outer peripheral edge of one main surface 51b of the inner plate portion 51, and is provided so as to be adjacent to the outer periphery of the contact rib member 6 arranged on the one main surface 51b. ing. The positioning convex portion 51c is formed lower than the contact rib member 6.

The mounting portion 53 is formed in a tubular shape (for example, a cylindrical shape) having an inner diameter of the same size as the diameter of the inner opening 51s and an outer diameter of the same or slightly smaller than the panel opening 3a. It is erected along the inner peripheral edge of one main surface 51b of the inner plate portion 51 so as to surround the opening 51s.

In this way, in the state where the mounting portion 53 is provided on one main surface 51b of the inner plate portion 51, the inner opening 51s is moved to the one main surface 51b side of the inner plate portion 51 by the inner peripheral surface of the mounting portion 53. It has been extended.

Further, in order to reduce the weight, a plurality of hollow portions 53b opened at the tip surface of the mounting portion 53 are provided inside the peripheral wall portion of the mounting portion 53 along the circumferential direction of the mounting portion 53 (FIG. 2). reference). The cavity 53b may be omitted.

A plurality of concave groove portions 54a are provided on the outer peripheral surface of the mounting portion 53, and a locking claw 55 for locking to the back peripheral edge of the panel opening 3a is arranged inside each concave groove portion 54a.

More specifically, the concave groove portions 54a are provided from the tip end to the base end of the mounting portion 53 along the tubular axis direction of the mounting portion 53, and are provided at intervals in the circumferential direction of the mounting portion 53. ..
Each locking claw 55 is erected on one main surface 51b of the inner plate portion 51 in a state of being arranged inside the concave groove portion 54a of the mounting portion 53. A claw portion 55b is provided at the tip of each locking claw 55. The claw portion 55b gradually protrudes from the tip end side of the locking claw 55 toward the base end side toward the outer peripheral side of the mounting portion 53, and also protrudes outward from the outer peripheral surface of the mounting portion 53.

The grommet body 4 is formed of a rubber elastic resin (for example, an elastomer or a resin containing graphite in the elastomer). The grommet main body 4 has a truncated cone-shaped tubular portion 41, a large-diameter tubular portion 42 provided at one end opening of the truncated cone-shaped tubular portion 41, and a small diameter provided at the other end opening of the truncated cone-shaped tubular portion 41. It is provided with a tubular portion 43.

The truncated cone-shaped tubular portion 41 has a large-diameter opening 41a and a small-diameter opening 41b having a diameter smaller than that of the large-diameter opening 41a, and the diameter is gradually reduced from the large-diameter opening 41a toward the small-diameter opening 41b. It is formed in a tubular shape.

The large-diameter tubular portion 42 is a mounting portion mounted on the inner circumference of the inner opening 51s of the inner member 5. Hereinafter, it will also be referred to as a mounting portion 42. The large-diameter tubular portion 42 is formed in a tubular shape (for example, a cylindrical shape) having an inner diameter equal to the inner diameter of the large-diameter opening 41a, and is connected to the large-diameter opening 41a in a communicating state.
The small-diameter tubular portion 43 is formed in a cylindrical shape (for example, a cylindrical shape) having an inner diameter of the same size as the inner diameter of the small-diameter opening 41b, and is connected to the small-diameter opening 41b in a communicating state. A flange portion extending toward the outer peripheral side is provided on the outer periphery of the tip portion of the small diameter tubular portion 43.

The abutting rib member 6 is formed in an annular shape (for example, an annular shape) by an elastic member, that is, a rubber elastic resin (for example, an elastomer or a resin containing graphite in the elastomer), and one main surface 51b of the inner plate portion 51. Is arranged adjacent to the inner peripheral side of the positioning convex portion 51c. The abutting rib member 6 is formed separately (that is, separately) from the inner member 5 and the grommet main body 4.

In the grommet 1 configured in this way, the mounting portion 42 of the grommet main body 4 is fitted to the inner circumference of the inner opening 51s from the other main surface 51a side of the inner member 5, so that the inner member 5 is fitted to the grommet main body 4. It is attached to. In this mounted state, the entire inner plate portion 51 is exposed. Further, in this mounting state, the outer peripheral surface of the mounting portion 42 and the inner peripheral surface of the inner opening 51s are fixed to each other by a fixing method such as adhesion or joining.

Further, in the grommet 1 configured in this way, a plurality of electric wires W through which the panel opening 3a of the vehicle body panel 3 is inserted are inside each part of the inner member 5 (that is, the mounting portion 53 and the inner plate portion 51) and the grommet main body 4 (That is, the large-diameter tubular portion 42, the truncated cone-shaped tubular portion 41, and the small-diameter tubular portion 43) are inserted into the inner circumference of the plurality of electric wires W (see FIG. 1).

Then, the grommet 1 is attached to the panel opening 3a by inserting the attachment portion 53 of the inner member 5 into the panel opening 3a of the vehicle body panel 3 while being attached to the outer circumference of the electric wire W.
In this mounted state, as shown in FIG. 6, the vehicle body panel 3 is arranged between one main surface 51b of the inner plate portion 51 and the claw portion 55b of the locking claw 55, and the claw portion 55b is the panel opening 3a. The grommet 1 is fixed to the panel opening 3a by locking to the peripheral edge on the back side.

Further, in the above mounting state, the contact rib member 6 arranged on one main surface 51b of the inner plate portion 51 is sandwiched between the inner plate portion 51 and the vehicle body panel 3. As a result, the contact rib member 6 ensures waterproofness, dustproofness, soundproofing, and rattling prevention between the grommet 1 and the vehicle body panel 3.

As described above, according to the first embodiment, the glomet main body 4 mounted on the outer periphery of the electric wire W inserted through the panel opening 3a of the vehicle body panel 3 and the glomet main body 4 mounted on the glomet main body 4 are attached to the panel opening 3a. The inner member 5 is provided on one main surface 51b of the inner plate portion 51 having an inner opening 51s through which the electric wire W is inserted, and the inner opening 51s is an inner. The grommet main body 4 has a tubular mounting portion 53 that extends to one main surface 51b side of the plate portion 51 and is attached to the panel opening 3a, and the grommet main body 4 has an inner member 5 with the inner plate portion 51 exposed. On the other hand, it has a tubular mounting portion 42 mounted on the inner circumference of the inner opening 51s from the main surface 51a side.

With this configuration, the mounting portion 42 of the grommet main body 4 is mounted on the inner circumference of the inner opening 51s of the inner member 5 with the inner plate portion 51 exposed. That is, since the mounting portion 42 of the grommet main body 4 does not cover the inner plate portion 51, it is possible to reduce the restrictions on the shape of the inner plate portion 51 and improve the degree of freedom in the shape.

Further, since the annular contact rib member 6 is provided on one main surface 51b of the inner plate portion 51 so as to surround the attachment portion 53, the inner member 5 is attached to the panel opening 3a. A contact rib member 6 is interposed between the inner plate portion 51 and the vehicle body panel 3. As a result, waterproofness, dustproofness, soundproofing, and rattling prevention between the grommet 1 and the vehicle body panel 3 can be ensured.

Further, since the contact rib member 6 is made of a rubber member, the waterproofness, dustproofness, soundproofing, and rattling prevention between the grommet 1 and the vehicle body panel 3 can be further improved.

Further, since the abutting rib member 6 is formed separately from the grommet main body 4 and the inner member 5, the degree of freedom in the shape of each of the abutting rib member 6, the grommet main body 4 and the inner member 5 can be improved. it can.
Further, the material of the contact rib member 6 can be made different from the material of the grommet main body 4 and the material of the inner member 5, and the selectivity of the material of the contact rib member 6 can be improved.

Further, since the positioning convex portion 51c for positioning the contact rib member 6 is provided on one main surface 51b of the inner plate portion 51 in a state of being adjacent to the outer peripheral side of the contact rib member 6, the positioning convex portion 51c On the other hand, it is possible to prevent the contact rib member 6 from being displaced on the main surface 51b.

Hereinafter, a modified example of the first embodiment will be described.
(Modification example 1)
In the first embodiment, the entire inner plate portion 51 is exposed. For example, one main surface (main surface on the vehicle body panel side) 51b and the other main surface (main surface on the grommet body side) 51a of the inner plate portion 51 are exposed. And, of the outer peripheral end portions, at least the outer peripheral end portion may be exposed. The entire outer peripheral edge may be exposed. As a result, since there is no resin member or the like at the outer peripheral end portion during work, catching is suppressed when contacting with others.

(Modification 2)
In the first embodiment, as shown in FIGS. 7A and 7B, the grommet main body 4 extends from the outer periphery of the base end portion of the mounting portion 42 to the outer peripheral side of the mounting portion 42 and the inner plate portion 51. On the other hand, a flange portion 44 that comes into contact with the main surface 51a may be further provided. The flange portion 44 is formed in, for example, a ring plate shape (for example, a ring plate shape).

The base end portion of the mounting portion 42 is an end portion of the mounting portion 42 opposite to the inner opening 51s in the insertion direction of the mounting portion 42 (that is, an end portion of the inner plate portion on the other main surface side). ..

According to the second modification, the flange portion 44 can increase the contact area between the grommet main body 4 and the inner member 5. As a result, when the contact portion between the grommet main body 4 and the inner member 5 is joined, the joining area can be increased, and the grommet main body 4 and the inner member 5 can be firmly fixed.

Further, the inner plate portion 51 can be reinforced by the flange portion 44. As a result, when the inner member 5 is attached to the panel opening 3a, the inner plate portion 51 can be strongly pressed against the vehicle body panel 3 by the flange portion 44, and the waterproof property between the grommet 1 and the vehicle body panel 3 is improved. Dustproof, soundproof and rattling prevention can be improved.

(Modification 3)
In the first embodiment, as shown in FIGS. 8A and 8B, the inner member 5 is provided on the other main surface 51a of the inner plate portion 51, and the inner opening 51s extends toward the other main surface 51a. It may further have a tubular mounted portion 52. In this case, the mounting portion 42 of the grommet main body 4 is mounted on the inner circumference of the mounted portion 52.

The mounted portion 52 is formed in a tubular shape (for example, a cylindrical shape) having an inner diameter equal to the diameter of the inner opening 51s, and surrounds the inner opening 51s, and the other main surface of the inner plate 51. It is erected along the inner peripheral edge of 51a.

According to the third modification, the mounting portion 52 is provided on the other main surface 51a of the inner member 5, so that the grommet main body 4 is provided regardless of the thickness of the inner plate portion 51 and the axial length of the mounting portion 53. It is possible to secure the axial length of the inner opening 51s necessary for stably mounting the mounting portion 42 inside the inner opening 51s.

In the state where the mounting portion 42 is mounted on the inner circumference of the mounting portion 52, the tip of the mounting portion 42 is arranged in the middle of the mounting portion 52 in the axial direction without reaching the inner plate portion 51. Also, it may be arranged on the back side of the inner plate portion 51, or may be arranged up to the same position as the inner plate portion 51.

(Modification example 4)
In the second modification, as shown in FIGS. 9A and 9B, the grommet main body 4 extends from the mounting portion 42 onto the outer peripheral surface of the mounted portion 52 of the inner plate portion 51, and the mounted portion 52. It may further have an outer peripheral contact portion 45 in contact with the outer peripheral surface of the.

In FIGS. 9A and 9B, the outer peripheral contact portion 45 is formed in a tubular shape and is arranged concentrically on the outer peripheral side of the mounting portion 42. The base end portion of the outer peripheral contact portion 45 extends radially inward of the outer peripheral contact portion 45 and is connected to the outer peripheral surface of the mounting portion 42. As a result, a space having a substantially U-shaped cross section is formed between the outer peripheral contact portion 45 and the mounting portion 42 in which the mounted portion 52 of the inner member 5 is fitted. When the mounting portion 42 is mounted on the inner circumference of the mounted portion 52, the mounted portion 52 fits into a space having a substantially U-shaped cross section between the outer peripheral contact portion 45 and the mounting portion 42, and the outer circumference The inner peripheral surface of the contact portion 45 is in contact with the outer peripheral surface of the mounted portion 52.

The base end portion of the outer peripheral contact portion 45 is an end portion of the outer peripheral contact portion 45 opposite to the inner opening 51s in the insertion direction of the mounting portion 42.

According to the modified example 4, the contact area between the grommet main body 4 and the inner member 5 can be increased by the outer peripheral contact portion 45. As a result, when the contact portion between the grommet main body 4 and the inner member 5 is joined, the joining area can be increased, and the grommet main body 4 and the inner member 5 can be firmly joined.

(Modification 5)
In the modified example 4, as shown in FIGS. 10A and 10B, the grommet main body 4 extends from the tip end portion of the outer peripheral contact portion 45 to the outer peripheral side of the outer peripheral contact portion 45 and the inner plate portion 51. On the other hand, it may further have a flange portion 49 that abuts on the main surface 51a. In this case, the tip of the outer peripheral contact portion 45 extends until it comes into contact with the other main surface 51a of the inner plate portion 51. That is, the tip portion of the outer peripheral contact portion 45 is a portion that abuts on the other main surface 51a of the inner plate portion 51. The flange portion 49 is formed in, for example, a ring plate shape (for example, a ring plate shape).

According to the modified example 5, the contact area between the grommet main body 4 and the inner member 5 can be increased by the flange portion 49. As a result, when the contact portion between the grommet main body 4 and the inner member 5 is joined, the joining area can be increased, and the grommet main body 4 and the inner member 5 can be firmly fixed.

Further, the inner plate portion 51 can be reinforced by the flange portion 49. As a result, when the inner member 5 is attached to the panel opening 3a, the inner plate portion 51 can be strongly pressed against the vehicle body panel 3 by the flange portion 49, and the waterproof property between the grommet 1 and the vehicle body panel 3 is improved. Dustproof, soundproof and rattling prevention can be improved.

(Modification 6)
In the first embodiment, the thickness of the peripheral wall portion of the mounting portion 42 of the grommet main body 4 was uniform, but as shown in FIG. 11, the thickness D of the peripheral wall portion of the mounting portion 42 is set to the base of the mounting portion 42. It may be formed so as to gradually become thinner from the end portion to the tip portion.
The base end portion of the mounting portion 42 is the end portion of the mounting portion 42 opposite to the inner opening 51s in the insertion direction of the mounting portion 42, and the tip end portion of the mounting portion 42 is the mounting portion 42. , The end of the mounting portion 42 in the insertion direction with respect to the inner opening 51s.

According to the modified example 6, when the electric wire W is inserted into the grommet 1 from the mounting portion 53 side, it is possible to prevent the electric wire W from being caught in the mounting portion 42.

(Modification 7)
In the first embodiment, the height of the tip portion 42s of the mounting portion 42 of the grommet main body 4 is the same along the circumferential direction of the inner opening 51s, but as shown in FIG. 12, for example, the height of the mounting portion 42 The height of the tip portion 42s may be different depending on the position of the inner opening portion 51s in the circumferential direction.

In FIG. 12, the height of the tip portion 42s of the mounting portion 42 is formed so that, for example, the through hole opening surface 42m on the tip portion 42s side of the mounting portion 42 is inclined with respect to the axial core line L of the mounting portion 42. As a result, the height is highest at a predetermined location in the circumferential direction of the inner opening 51s (for example, a portion where the electric wires W are unevenly distributed), and gradually decreases toward the opposite side of the predetermined location, and at the opposite side of the predetermined location. It is formed to be the lowest.

According to the modified example 7, the height of the tip portion 42s of the mounting portion 42 can be set to be the highest in the portion of the circumferential direction of the inner opening portion 51s where the electric wires W are unevenly distributed. As a result, the mounting portion 42 can be effectively interposed between the inner peripheral surface of the inner opening 51s and the electric wire W, and the mounting portion 42 betweens the inner peripheral surface of the inner opening 51s and the electric wire W. The electric wire W can be effectively protected from friction and rubbing.

(Modification 8)
In the first embodiment, the thickness of the peripheral wall portion of the mounting portion 42 of the grommet main body 4 was the same along the circumferential direction of the inner opening 51s, but as shown in FIGS. 13A and 13B, for example. The thickness D of the peripheral wall portion of the mounting portion 42 may be different depending on the position of the inner opening portion 51s in the circumferential direction.

In FIG. 13, the thickness D of the peripheral wall portion of the mounting portion 42 becomes the thickest at a predetermined portion (for example, a portion where the electric wires W are unevenly distributed) in the circumferential direction of the inner opening 51s, and as it goes to the opposite side of the predetermined portion. It is formed so that it gradually becomes thinner and becomes the thinnest at the predetermined location.

According to the modified example 8, the thickness D of the peripheral wall portion of the mounting portion 42 can be made the thickest in the portion where the electric wires W are unevenly distributed in the circumferential direction of the inner opening 51s. As a result, the mounting portion 42 can be effectively thickened between the inner peripheral surface of the inner opening 51s and the electric wire W, and the mounting portion 42 causes friction between the inner peripheral surface of the inner opening 51s and the electric wire W. The electric wire W can be effectively protected from rubbing.

(Modification 9)
In the first embodiment, the tip portion 42s of the mounting portion 42 of the grommet main body 4 is not extended to the tip portion 53s of the mounting portion 53 of the inner member 5, but as shown in FIG. 14, the tip portion of the mounting portion 42 The portion 42s may be extended to the tip portion 53s of the mounting portion 53 of the inner member 5. That is, the mounting portion 42 may cover the entire inner peripheral surface of the mounting portion 53. The tip end portion 42s of the mounting portion 42 is an end portion of the mounting portion 42 on the one main surface 51b side of the inner member 5.

According to the ninth modification, the mounting portion 42 covers the peripheral edge on the tip end side of the inner peripheral surface of the mounting portion 53 (that is, the portion of the inner peripheral surface of the mounting portion 53 where the electric wires are strongly in contact with each other). As a result, the electric wire W can be protected from the peripheral edge on the tip end side of the inner peripheral surface of the mounting portion 53.

(Modification example 10)
As shown in FIG. 15A, the grommet main body 4 of the modified example 10 further has an extension portion 47 in the grommet main body 4 of the modified example 9. The extension portion 47 extends from the tip end portion of the mounting portion 42 to the base end portion of the outer peripheral surface of the mounting portion 53 via the tip end portion of the mounting portion 53.
The tip of the mounting portion 42 is the same as the definition in the modified example 6, and the base end portion of the outer peripheral surface of the mounting portion 53 is one of both ends of the outer peripheral surface of the mounting portion 53 in the central axial direction. It is an end portion on the inner plate portion 51 side.

Further, the extending portion 47 covers the entire tip portion 53s of the mounting portion 53 except for the concave groove portion 54a, and as shown in FIG. 15B, the concave groove portion 54a of the outer peripheral surface of the mounting portion 53 is covered. It covers the whole except. In addition, in FIGS. 15A and 15B, the peripheral wall portion of the mounting portion 53 has a structure in which the hollow portion 53b is omitted.
The tip portion 53s of the mounting portion 53 is an end portion of both ends of the mounting portion 53 in the axial direction opposite to the inner plate portion 51.

According to the modified example 10, in a state where the inner member 5 is attached to the panel opening 3a, an extension portion 47 is interposed between the attachment portion 53 of the inner member 5 and the panel opening 3a. As a result, the extension portion 47 can improve the adhesion and waterproofness, dustproof, soundproofing and rattling prevention between the mounting portion 53 and the panel opening 3a, and the mounting portion 53 and the panel opening 3a can be improved. It is possible to suppress rattling between and.
Further, since the extension portion 47 extends from the mounting portion 42, it can be formed together with the mounting portion 42, and the productivity of the grommet 1 can be improved.
Further, since the tip portion of the mounting portion 42 is covered with the extending portion 47, it is possible to prevent the tip portion of the mounting portion 42 from interfering with the peripheral member when the inner member 5 is mounted on the panel opening 3a. Can be done.

The extension portion 47 is not limited to the shape described with reference to FIGS. 15A and 15B. For example, the extending portion 47 covers the entire tip portion 53s of the mounting portion 53, and as shown in FIG. 16, the outer peripheral surface of the mounting portion 53 has a vertical stripe shape (that is, from the tip portion of the mounting portion 53 to the mounting portion 53). The band-shaped portion 47a extending to the base end portion of the outer peripheral surface of the above may be formed so as to cover the mounting portion 53 in a shape in which a plurality of strip-shaped portions 47a are arranged at intervals in the circumferential direction.
Alternatively, as shown in FIG. 17, the extending portion 47 may be formed so as to cover a part in the circumferential direction at the tip portion and the outer peripheral surface of the mounting portion 53.

Further, in the modified example 10, the extension portion 47 extends to the base end portion of the outer peripheral surface of the mounting portion 53, but it does not necessarily have to extend to the base end portion of the outer peripheral surface of the mounting portion 53. , It may extend to the outer peripheral surface of the mounting portion 53 (that is, between the tip end portion and the base end portion of the outer peripheral surface of the mounting portion 53).

(Modification 11)
As shown in FIGS. 18A and 18B, the grommet main body 4 of the modified example 11 further has an annular waterproof portion 48 in the grommet main body 4 of the modified example 10. The annular waterproof portion 48 is formed in an annular shape and is arranged so as to surround the mounting portion 53 on one main surface 51b of the inner plate portion 51. Further, the annular waterproof portion 48 is integrally formed with the extension portion 47 by connecting the inner peripheral side thereof to the tip end portion of the extension portion 47.

In FIGS. 18A and 18B, the annular waterproof portion 48 is formed in an annular shape covering the inner half in the radial direction on one main surface 51b of the inner plate portion 51, while the annular waterproof portion 48 is formed on the outer side in the radial direction on the one main surface 51b. It may be an annular shape covering a half or a radial central portion. Further, in FIGS. 18A and 18B, the contact rib member 6 and the positioning convex portion 51c are omitted, and the annular waterproof portion 48 functions as the contact rib member 6.

According to the modification 11, the annular waterproof portion 48 is interposed between the inner plate portion 51 and the vehicle body panel 3 in a state where the inner member 5 is attached to the panel opening 3a. As a result, the annular waterproof portion 48 can ensure waterproofness, dustproofness, soundproofing, and rattling prevention between the inner plate portion 51 and the vehicle body panel 3.

Further, since the annular waterproof portion 48 is connected to the extension portion 47, it can be formed together with the extension portion 47, and the productivity of the grommet 1 can be improved.
Although the contact rib member 6 is omitted in FIGS. 18A and 18B, the contact rib member 6 may be provided. In this case, the combination of the contact rib member 6 and the annular waterproof portion 48 can further improve waterproofness, dustproofness, soundproofing, and rattling prevention.

(Modification 12)
In the first embodiment, the positioning convex portion 51c is formed in an annular shape, but is not limited to such a shape, and may be formed as a point-shaped protrusion, for example, as shown in FIG. .. In this case, a plurality of positioning convex portions 51c may be provided at intervals along the circumferential direction of the contact rib member 6 in a state of being adjacent to the outer peripheral side of the contact rib member 6.

Further, as shown in FIG. 20, the positioning convex portion 51c may be provided in a state of being adjacent to the inner peripheral side of the contact rib member 6. In FIG. 20, a plurality of positioning convex portions 51c are formed as point-shaped protrusions and are provided at intervals in the circumferential direction of the contact rib member 6, but the shape is the same as that in the first embodiment. It may be formed in a ring shape. Further, the positioning convex portion 51c may be provided on the inner peripheral side and the outer peripheral side of the contact rib member 6.

(Modification 13)
In the modified example 13, as shown in FIG. 21, the positioning convex portion 51c is provided directly below the abutting rib member 6 on one main surface 51b of the inner plate portion 51, and is provided on the bottom surface of the abutting rib member 6. A fitting recess 6a into which the positioning convex portion 51c is fitted is formed. That is, the contact rib member 6 is formed on one main surface 51b of the inner plate portion 51 in a state where the fitting recess 6a is fitted to the positioning convex portion 51c.

The positioning convex portion 51c may be formed continuously in an annular shape along the longitudinal direction of the abutting rib member 6, or a plurality of dots spaced apart from each other along the longitudinal direction of the abutting rib member 6. May be formed in. The fitting recess 6a may be formed in a continuous annular shape along the longitudinal direction of the bottom surface of the contact rib member 6 according to the shape of the positioning convex portion 51c, or the fitting recess 6a may be formed on the bottom surface of the contact rib member 6. It may be formed in a plurality of dots that are spaced apart from each other along the longitudinal direction.

According to the modified example 13, by fitting the fitting concave portion 6a and the positioning convex portion 51c, it is possible to prevent the abutting rib member 6 from being displaced on one main surface 51b of the inner plate portion 51. Further, since the contact rib member 6 is formed on the positioning convex portion 51c, the strength of the contact rib member 6 can be improved.

The contact rib member 6 may be fitted to the positioning convex portion 51c after its formation, or may be integrally formed with the inner plate portion 51 by injection molding.

(Modification 14)
In the first embodiment, the positioning convex portion 51c for positioning the contact rib member 6 is provided on one main surface 51b of the inner plate portion 51, but in the modified example 14, the contact convex portion 51c is replaced with the positioning convex portion 51c. An extended contact rib portion 51f that positions the rib member 6 and functions as a part of the contact rib member 6 is provided. As shown in, for example, the extended contact rib portion 51f is provided on one main surface 51b of the inner plate portion 51 in a tangential spiral shape on the outer periphery of the extended contact rib member 6. That is, a plurality of extended contact rib portions 51f are linearly extended along one side in different tangential directions on the outer circumference of the contact rib member 6, and one end of each extended contact rib portion 51f is the same. It is arranged so as to be in contact with the outer periphery of the rib contact member 6.

According to the modified example 14, when the contact rib member 6 is fitted inside the tangential spiral extended contact rib portion 51f, the contact rib member 6 is rotated along the tangential spiral extended contact rib portion 51f. By doing so, it can be easily fitted inside the tangential spiral extending contact rib portion 51f. Further, the extended contact rib portion 51f is sandwiched between the inner plate portion 51 and the vehicle body panel 3, and cooperates with the contact rib member 6 to contribute to waterproofness, dustproofness, soundproofing, and rattling prevention. Can be done.

In the modified example 14, the extended contact rib portion 51f was formed in a tangential spiral shape on the outside of the contact rib member 6, but was formed in a convex shape on the outside or inside of the contact rib member 6. You may.

(Modification 15)
In the first embodiment, the abutting rib member 6 is composed of one annular rib, but is not limited to such a structure, and is, for example, a multiple connecting ring structure as shown in FIG. 23. May be good.
In the multiple connecting ring structure shown in FIG. 23, a plurality of abutting rib members 6 are formed in an annular shape having different sizes, arranged on the outer peripheral side of the mounting portion 53, and arranged on the outer side in order of each other (for example, two). ), And a plurality of connecting rib portions 62 that are provided so as to straddle between the annular rib portions 61 adjacent to each other and connect the annular rib portions 61 adjacent to each other.

Each of the plurality of connecting rib portions 62 is formed in a radial spiral shape extending in the radial direction of the annular rib portion 61 and curved to one side in the circumferential direction, but the shape is not limited to this, and for example, The annular rib portion 61 may be formed in a shape extending linearly in the radial direction.

According to the modification 15, since the contact rib member 6 includes a plurality of annular rib portions 61, the waterproofness, dustproofness, soundproofing, and rattling prevention between the grommet 1 and the vehicle body panel 3 can be further improved. .. Further, since the annular rib portions 61 are connected to each other via the connecting rib portions 62, it is possible to prevent the relative arrangement of the annular rib portions 61 from being displaced.

In the modified example 15, as shown in FIG. 24, the annular rib portions 61 of the multiple connection ring structure may be formed at different heights from each other. In FIG. 24, the height d1 of the outer annular rib portion 61a is higher than the height d2 of the inner annular rib portion 61b (that is, the height of each annular rib portion 61 is as high as the outer annular rib portion 61). On the contrary, the height d1 of the outer annular rib portion 61a may be lower than the height d2 of the inner annular rib portion 61b (that is, the height of each annular rib portion 61 may be higher by the inner annular rib portion 61. You may).

Further, in the modified example 15, the connecting rib portion 62 may not be provided. In this case, the contact rib member 6 has a multiple ring structure instead of a multiple connection ring structure.

(Modification 16)
In the first embodiment, the positioning convex portion 51c is provided on one main surface 51b of the inner plate portion 51, but as shown in FIG. 25, the one main surface 51b of the inner plate portion 51 is replaced with the positioning convex portion 51c. May be provided with a positioning groove portion 51d for positioning the contact rib member 6.

The positioning groove portion 51d is formed in an annular shape along the arrangement location of the contact rib member 6. Then, the contact rib member 6 is positioned at a predetermined position on the main surface 51b by fitting the base end side thereof into the positioning groove portion 51d. With this configuration, the contact rib member 6 is fitted into the positioning groove portion 51d, so that the position shift of the contact rib member 6 can be prevented.

(Modification 17)
In the first embodiment, the outer circumference of the mounting portion 42 of the grommet main body 4 and the inner circumference of the inner opening 51s of the inner member 5 may be joined by insert molding.
More specifically, the inner member 5 is formed in advance by using, for example, a mold for forming the inner member 5. Then, as shown in FIG. 26, a mold K1 for forming the grommet main body 4 and the inner member 5 in a state of being assembled to each other is prepared. Then, the molten resin for forming the grommet main body 4 is injected in the state where the inner member 5 is arranged in the cavity K1a of the mold K1. As a result, the grommet main body 4 is injection-molded in a state where the outer circumference of the mounting portion 42 of the grommet main body 4 is joined to the inner circumference of the inner opening 51s of the inner member 5.

According to the modified example 17, the outer circumference of the mounting portion 42 of the grommet main body 4 and the inner circumference of the inner opening 51s of the inner member 5 can be joined without using an adhesive. Further, the outer circumference of the mounting portion 42 and the inner circumference of the inner opening 51s can be joined together with the manufacture of the grommet main body 4, and the productivity of the grommet 1 can be improved.

In the modified example 17, the inner member 5 was formed in advance, and the grommet main body 4 was injection-molded by injecting molten resin in a state where the inner member 5 was arranged in the cavity K1a of the mold K1. 4 may be formed in advance, and the inner member 5 may be injection-molded by injecting molten resin in a state where the grommet main body 4 is arranged in the cavity K1a of the mold K1.

(Modification 18)
In the first embodiment, the shape of the inner plate portion 51 (that is, the contour in a plan view) is formed in a circular shape, but the shape is not limited to such a shape, and as shown in FIG. 27, on the outer periphery of the inner plate portion 51. The shape may be such that one or more (one in FIG. 27) concave portions 51e recessed toward the inner opening 51s are provided.

(Modification 19)
In the first embodiment, the grommet main body 4 has a truncated cone-shaped tubular portion 41, a large-diameter tubular portion (that is, a mounting portion) 42 provided in the large-diameter opening 41a of the truncated cone-shaped tubular portion 41, and a truncated cone shape. The small-diameter tubular portion 43 provided in the small-diameter opening 41b of the tubular portion 41 is provided, but as shown in FIG. 28, the large-diameter opening 41a and the large-diameter tubular portion 42 of the truncated cone-shaped tubular portion 41 are further provided. A cylindrical bellows portion 46 may be provided between them in a communicative state.

(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. 29 and 30.
The grommet 1B according to the second embodiment is a through hole 53a (first through hole) penetrating between the outer peripheral surface and the inner peripheral surface of the mounting portion 53 of the inner member 5 in the grommet 1 according to the first embodiment. ) Is provided, and the contact rib member 6 and the grommet main body 4 are integrally formed via the connecting portion 80 through which the through hole 53a is inserted.
Hereinafter, the same parts as those of the first embodiment are designated by the same reference numerals as those of the first embodiment, the description thereof will be omitted, and the parts different from those of the first embodiment will be mainly described.

As shown in FIGS. 29A and 29B, in the inner plate portion 51 of the second embodiment, the positioning convex portion 51c is omitted in the inner plate portion 51 of the first embodiment, and the mounting portion 53 has a through hole. 53a is provided. A plurality of through holes 53a are provided at the base end portion of the mounting portion 53 at intervals along the circumferential direction of the mounting portion 53. In FIG. 31, a plurality of through holes 53a are provided, but only one may be provided.

In the second embodiment, the mounting portion 42 of the grommet main body 4 is mounted on the inner circumference of the inner opening 51s, and the tip portion 42s of the mounting portion 42 covers each through hole 53a of the mounting portion 53. , Is arranged on the back side of one main surface 51b of the inner plate portion 51.

Each connecting portion 80 is formed in a rod shape, for example. One end of each connecting portion 80 is fitted into the through hole 53a of the mounting portion 53 and connected to the outer peripheral surface of the mounting portion 42, and the other end of each connecting portion 80 is inner from the through hole 53a of the mounting portion 53. It is pulled out on one main surface 51b of the plate portion 51 and is connected to the inner circumference of the contact rib member 6 arranged on the one main surface 51b.

Next, a method for manufacturing the grommet 1B will be described with reference to FIG.
First, the inner member 5 is formed in advance by using, for example, a mold for forming the inner member 5. Then, a mold K3 for integrally forming the grommet main body 4, the inner member 5, the contact rib member 6, and the connecting portion 80 is prepared. Then, with the inner member 5 arranged in the cavity K3a of the mold K3, the grommet main body 4, the contact rib member 6, and the molten resin for forming the connecting portion 80 are injected, and the grommet main body 4 The rib contact member 6 and the connecting portion 80 are integrally injection-molded.

As a result, the grommet main body 4 is formed in a state where the outer circumference of the mounting portion 42 of the grommet main body 4 and the inner circumference of the inner opening 51s are joined to each other. Further, the contact rib member 6 is formed in a state where the mounting portion 42 and the contact rib member 6 are connected via the connecting portion 80 into which the through hole 53a of the mounting portion 53 is fitted.

As described above, according to the grommet 1B of the second embodiment, since the abutting rib member 6 can be fixed to the grommet main body 4 via the connecting portion 80 through which the through hole 53a is inserted, the abutting rib member on the inner plate portion 51 It is possible to prevent the misalignment of 6. Further, since the through hole 53a is provided in the mounting portion 53, the route of the connecting portion 80 connecting the grommet main body 4 and the contact rib member 6 can be made a short and simple route.

Further, according to the manufacturing method of the second embodiment, the outer circumference of the mounting portion 42 of the grommet main body 4 and the inner circumference of the inner opening 51s of the inner member 5 can be joined without using an adhesive. Further, the contact rib member 6 and the connecting portion 80 can be formed in the step of forming the grommet main body 4, and the productivity of the grommet 1B can be improved.

In the second embodiment, the inner member 5 is formed in advance, and the molten resin is injected with the inner member 5 placed in the cavity K3a of the mold K3 to inject the grommet body 4, the contact rib member 6, and the connecting portion. The 80 was injection-molded, but conversely, the grommet body 4 and the contact rib member 6 integrally formed via the connecting portion 80 were formed in advance, and integrally formed in the cavity K3a of the mold K3 via the connecting portion 80. The inner member 5 may be injection-molded by injecting molten resin in a state where the grommet main body 4 and the connecting portion 80 are arranged.

(Third Embodiment)
Hereinafter, a seventh embodiment of the present invention will be described with reference to FIGS. 31 to 34.
As shown in FIGS. 31 to 33, the grommet 1C according to the third embodiment is attached to the inner plate portion 51 in the grommet 1 according to the modified example 2 of the first embodiment, with one main surface 51b and the other main surface 51a. A through hole 71 (second through hole) penetrating between the two is provided, and the contact rib member 6 and the grommet main body 4 are integrally formed via a connecting portion 70 through which the through hole 71 is inserted.
Hereinafter, the same parts as those of the first embodiment are designated by the same reference numerals as those of the first embodiment, the description thereof will be omitted, and the parts different from those of the first embodiment will be mainly described.

The inner plate portion 51 of the third embodiment is the inner plate portion 51 of the first embodiment in which the positioning convex portion 51c is omitted and a through hole 71 through which the connecting portion 70 is inserted is provided.

The through holes 71 are provided in a state of penetrating between one main surface 51b and the other main surface 51a of the inner plate portion 51, and a plurality of through holes 71 are provided along the arrangement location of the contact rib member 6 on the one main surface 51b. ing. In the third embodiment, a plurality of through holes 71 are provided, but only one may be provided.

The through hole opening surface 71a on the one main surface 51b side of each through hole 71 has a superposed portion 71b that overlaps directly under the contact rib member 6 and an overhanging portion 71c that overhangs the inner peripheral side of the contact rib member 6. Have. The hole axial direction P of each through hole 71 is perpendicular to one main surface 51b and the other main surface 51a of the inner plate portion 51, and the cross-sectional shape DK of each through hole 71 is from one main surface 51b of the inner plate portion 51. On the other hand, it is constant toward the main surface 51a. The cross-sectional shape DK of the through hole 71 is a cross-sectional shape when the through hole 71 is cut along a surface parallel to the through hole opening surface 71a.

In the third embodiment, a ring plate-shaped (for example, an annular plate-shaped) flange portion 44 is provided on the outer periphery of the tip end portion of the mounting portion 42 of the grommet main body 4 so as to extend toward the outer peripheral side of the mounting portion 42. The flange portion 44 abuts on the other main surface 51a of the inner plate portion 51 with the inner member 5 mounted on the grommet main body 4, and covers the through hole opening surface on the other main surface 51a side of the through hole 71. The diameter of the flange portion 44 is formed to be the same as or larger than the diameter of the virtual circle C circumscribing the entire plurality of through holes 71 provided in the inner plate portion 51 (see FIG. 33).

The connecting portion 70 is arranged inside each through hole 71, and is formed in a columnar shape having the same shape and size as the arranged through hole 71. The base end surface of the connecting portion 70 is connected to one main surface 44a of the flange portion 44. Of the tip surface of the connecting portion 70, the portion overlapping the base end surface of the contact rib member 6 (that is, the portion overlapping the overlapping portion 71b of the through hole opening surface 71a of the through hole 71) is formed on the base end surface of the contact rib member 6. The portion that is connected and does not overlap the base end surface of the contact rib member 6 (that is, the portion that overlaps the overhanging portion 71c of the opening surface 71a of the through hole 71) is exposed to the outside from the overhanging portion 71c.
The connecting portion 70 is made of the same material as the grommet main body 4 and the contact rib member 6.

Next, a method for manufacturing the grommet 1C will be described with reference to FIG. 34.
First, the inner member 5 is formed in advance by using, for example, a mold for forming the inner member 5. Then, a mold K2 for integrally forming the grommet main body 4, the inner member 5, the contact rib member 6, and the connecting portion 70 is prepared. Then, with the inner member 5 arranged in the cavity K2a of the mold K2, the grommet main body 4, the contact rib member 6, and the molten resin for forming the connecting portion 70 are injected, and the grommet main body 4 The rib contact member 6 and the connecting portion 70 are integrally injection-molded.

As a result, the mounting portion 42 of the grommet main body 4 and the mounted portion 52 of the inner member 5 are joined to each other, and one main surface 44a of the flange portion 44 and the other main surface 51a of the inner plate portion 51 are joined to each other. , The grommet body 4 is formed. Further, the contact rib member 6 is formed in a state where the flange portion 44 and the contact rib member 6 are connected via the connecting portion 70.

As described above, according to the third embodiment, since the abutting rib member 6 is fixed to the grommet main body 4 via the connecting portion 70, it is possible to prevent the abutting rib member 6 from being displaced in the inner plate portion 51. Can be done. Further, the contact rib member 6 can be formed in the step of forming the grommet main body 4, and the productivity of the grommet 1B can be improved.

Further, the inner plate portion 51 is provided with a through hole 71 (second through hole) penetrating between the one main surface 51b and the other main surface 51a, and the connecting portion 70 is provided with the grommet main body 4 through the through hole 71. In order to connect the abutting rib member 6, it is possible to prevent the connecting portion 70 from wrapping around the outer peripheral end portion of the inner plate portion 51 in order to connect the connecting portion 70 and the abutting rib member 6. As a result, it is possible to prevent the connecting portion 70 from being caught by the peripheral members existing around the grommet 1B.

Further, the through hole opening surface 71a of each through hole 71 has a superposed portion 71b that overlaps directly under the contact rib member 6 and an overhanging portion 71c that overhangs the inner peripheral side of the contact rib member 6. .. That is, the radial width of each through hole 71 is formed to be larger than the radial width of the contact rib member 6. Therefore, even when the radial width of the contact rib member 6 is relatively small, the radial width of the through hole 71 can be secured to be relatively large. As a result, when the grommet main body 4 and the abutting rib member 6 are injection-molded, the molten resin can be smoothly injected from the grommet main body 4 side to the abutting rib member 6 side through each through hole 71.

Further, since each through hole 71 has a portion that overlaps directly under the contact rib member 6, the connecting portion 70 can be connected to the base end surface of the contact rib member 6. As a result, it is possible to prevent the connecting portion 70 from being arranged on one main surface 51b of the inner plate portion 51, so that the arrangement of the connecting portion 70 can be simplified.

Further, since the hole axial direction P of each through hole 71 is perpendicular to one main surface 51b and the other main surface 51a of the inner plate portion 51, each through hole 71 can be made to have the shortest length. The wiring of the connecting portion 70 can be simplified.
Further, it is possible to prevent the connecting portion 70 from being arranged on the other main surface 51a of the inner plate portion 51, and it is possible to simplify the arrangement of the connecting portion 70.

In the third embodiment, the inner member 5 is formed in advance, and the grommet main body 4, the contact rib member 6, and the connecting portion 70 are formed in a state where the inner member 5 is arranged in the cavity K2a of the mold K2. The molten resin for forming was injected to inject the grommet main body 4, the abutting rib member 6 and the connecting portion 70, but conversely, the grommet main body 4 and the abutting rib member integrally formed via the connecting portion 70 were formed. 6 is formed in advance, and in a state where the grommet main body 4 and the abutting rib member 6 integrally formed via the connecting portion 70 are arranged in the cavity K2a of the mold K2, the melting for forming the inner member 5 is performed. The inner member 5 may be injection-molded by injecting a resin.

Hereinafter, a modified example of the third embodiment will be described.
(Modification example 1)
In the third embodiment, the cross-sectional shape DK of the through hole 71 is constant from one main surface 51b of the inner plate portion 51 toward the other main surface 51a, but from one main surface 51b of the inner plate portion 51 to the other main surface. It may be changed toward the surface 51a.

Specifically, as shown in FIG. 35 (a), the cross-sectional shape DK of the through hole 71 may be gradually reduced in diameter from one main surface 51b of the inner plate portion 51 toward the other main surface 51a. Alternatively, as shown in FIG. 35 (b), the cross-sectional shape DK of the through hole 71 may be gradually expanded in diameter from one main surface 51b of the inner plate portion 51 toward the other main surface 51a.

Alternatively, as shown in FIG. 35 (c), the cross-sectional shape DK of the through hole 71 is gradually reduced in diameter from the other main surface 51a of the inner plate portion 51 toward the one main surface 51b, and the diameter of the through hole 71 is gradually reduced from the middle to the one main surface 51b. The diameter may be gradually increased up to the surface 51b. Alternatively, as shown in FIG. 35 (d), the cross-sectional shape DK of the through hole 71 is gradually expanded from the other main surface 51a of the inner plate portion 51 toward the one main surface 51b, and the diameter of the through hole 71 is gradually increased from the middle to the one main surface 51b. The diameter may be gradually reduced to the surface 51b.

As described above, according to the first modification, the grommet main body 4 and the contact rib member 6 are formed by changing the cross-sectional shape DK of the through hole 71 from one main surface 51b of the inner plate portion 51 toward the other main surface 51a. At the time of injection molding, the passing pressure and the passing flow rate of the molten resin passing through the through hole 71 can be set to desired values.

(Modification 2)
In the third embodiment, the hole axial direction P of each through hole 71 is perpendicular to one main surface 51b and the other main surface 51a of the inner plate portion 51, but the one main surface 51b and the inner plate portion 51 On the other hand, it may be inclined with respect to the main surface 51a.

Specifically, as shown in FIG. 36A, the diameter of the inner opening 51s is such that the hole axial direction P of each through hole 71 is directed from the other main surface 51a of the inner plate portion 51 toward the one main surface 51b. It may be inclined to the outside of the direction Q. In this case, the contact rib member 6 may be erected perpendicularly to one main surface 51b of the inner plate portion 51 as in the third embodiment, but as shown in FIG. 36A, the through hole 71 It may be provided in a state of being inclined outward in the radial direction Q along the above.

Alternatively, as shown in FIG. 36B, the hole axial direction P of each through hole 71 is set in the radial direction Q of the inner opening 51s from the other main surface 51a of the inner plate 51 toward the one main surface 51b. It may be tilted inward. In this case as well, as shown in FIG. 36B, the contact rib member 6 may be provided in a state of being inclined inward in the radial direction Q along the through hole 71.

As described above, according to the second modification, if the hole axial direction P of the through hole 71 is inclined to the outside of the radial direction Q of the inner opening 51s, the contact rib member 6 is moved to the outside along the through hole 71. It becomes easy to form an inclined shape, and conversely, when the hole axial direction P of the through hole 71 is inclined inward in the radial direction Q, the contact rib member 6 is inclined inward along the through hole 71. It becomes easy to form into a shape.

(Modification 3)
In the third embodiment, the through hole opening surface 71a on the one main surface 51b side of each through hole 71 projects from directly below the contact rib member 6 to the inner peripheral side of the contact rib member 6, but the through hole 71 The relative arrangement of the through-hole opening surface 71a and the contact rib member 6 is not limited in this way.

For example, as shown in FIGS. 37A and 37B, the through-hole opening surface 71a of each through-hole 71 projects directly below the abutting rib member 6 (that is, toward the inner peripheral side and the outer peripheral side of the abutting rib member 6). It may be arranged (so that it does not exist). In this case as well, as in the case of the third embodiment, since the connecting portion 70 is not arranged on one main surface 51b of the inner plate portion 51, the arrangement of the connecting portion 70 can be simplified.

Alternatively, as shown in FIGS. 38 (a) and 38 (b), the through-hole opening surface 71a of each through-hole 71 may be arranged on the inner peripheral side of the contact rib member 6. In this case, the connecting portion 70 is arranged on one main surface 51b of the inner plate portion 51 from the through hole opening surface 71a of the through hole 71 to the inner peripheral surface of the contact rib member 6, and the contact rib member 6 is arranged. It is connected to the inner peripheral surface of.

In this way, by arranging the through hole opening surface 71a of each through hole 71 on the inner peripheral side of the abutting rib member 6, the flange portion 44 can be provided so as to be limited to the inner peripheral side of the abutting rib member 6. As a result, the diameter of the flange portion 44 can be made as small as possible.

Alternatively, as shown in FIGS. 39 (a) and 39 (b), the through-hole opening surface 71a of each through-hole 71 may be arranged on the outer peripheral side of the contact rib member 6. In this case, the connecting portion 70 is arranged on one main surface 51b of the inner plate portion 51 from the through hole opening surface 71a of the through hole 71 to the outer peripheral surface of the contact rib member 6, and the contact rib member 6 is arranged. It is connected to the outer peripheral surface.

By arranging the through hole opening surface 71a of each through hole 71 on the outer peripheral side of the abutting rib member 6 in this way, the inner opening 51s does not interfere with the connecting portion 70 and is in the vicinity of the abutting rib member 6. Can be expanded to.

(Modification example 4)
In the third embodiment, the flange portion 44 is formed in the shape of a ring plate, but the planar shape of the flange portion 44 is not limited in this way. For example, as shown in FIG. 40, the flange portion 44 has a plurality of convex portions 44b, and each convex portion 44b opens a through hole 71 from the outer periphery of the tip end portion of the mounting portion 42 of the grommet main body 4. It may be formed so as to be convex in a plan view toward the surface and to cover the opening of the through hole 71 facing the surface.
According to the fourth modification, the range in which the flange portion 44 covers the inner plate portion 51 can be limited to the minimum necessary.

The present invention is not limited to the above-described embodiments and modifications, and the technical scope also includes combinations of the above-described embodiments and modifications.

1,1B ... Grommet 3 ... Body panel 3a ... Panel opening 4 ... Grommet body 42 ... Mounting part 44 ... Flange part 44b ... Convex part 45 ... Outer peripheral contact part 47 ... Extension part 48 ... Circular waterproof part 49 ... Flange Part 5 ... Inner member 6 ... Contact rib member 51 ... Inner plate part 51c ... Positioning convex part 51d ... Positioning groove part 51f ... Extended contact rib part 51s ... Inner opening 52 ... Attached part 53 ... Mounting part 53a ... Penetration Hole 70 ... Connecting part 71 ... Through hole 71a ... Through hole opening surface 80 ... Connecting part DK ... Cross-sectional shape K1, K2, K3 ... Mold P ... Hole axial direction W ... Electric wire

Claims (22)

A grommet including a grommet body mounted on the outer periphery of an electric wire inserted through a panel opening of a vehicle body panel and an inner member attached to the panel opening while mounted on the grommet body.
The inner member is
An inner plate portion having an inner opening through which the electric wire is inserted,
It is provided on one main surface of the inner plate portion, and has a tubular attachment portion that extends the inner opening portion to the side of the one main surface and is attached to the panel opening portion.
The grommet body is a grommet having a tubular mounting portion mounted on the inner circumference of the inner opening from the other main surface side of the inner plate portion in a state where the inner plate portion is exposed. The grommet according to claim 1, wherein an annular contact rib member surrounding the mounting portion is provided on the one main surface of the inner plate portion. The grommet body according to claim 1 or 2, wherein the grommet body extends from the base end portion of the mounting portion to the outer peripheral side of the mounting portion and has a flange portion that abuts on the other main surface of the inner member. Grommet. The inner member is provided on the other main surface of the inner plate portion, and has a tubular mounted portion that extends the inner opening to the side of the other main surface.
The grommet according to claim 1 or 2, wherein the mounting portion of the grommet body is mounted on the inner circumference of the mounted portion. The grommet according to claim 4, wherein the grommet body extends from the mounting portion onto the outer peripheral surface of the mounted portion of the inner plate portion and has an outer peripheral contact portion that abuts on the outer peripheral surface. The fifth aspect of claim 5, wherein the grommet main body extends from the tip end portion of the outer peripheral contact portion to the outer peripheral side of the outer peripheral contact portion and has a flange portion that abuts on the other main surface of the inner plate portion. Grommet. The grommet according to any one of claims 1 to 6, wherein the tip of the mounting portion of the grommet body extends to the tip of the mounting portion. One of claims 1 to 6, wherein the grommet main body has an extension portion extending from the tip end portion of the mounting portion to the outer peripheral surface of the mounting portion via the tip end portion of the mounting portion. The grommet described in. The grommet according to claim 8, wherein the extended portion extends to a base end portion of an outer peripheral surface of the mounting portion. According to claim 8 or 9, the grommet body is arranged on one of the main surfaces of the inner plate portion so as to surround the mounting portion and has an annular waterproof portion connected to the tip end portion of the extension portion. The listed grommet. The grommet according to any one of claims 1 to 7, wherein the thickness of the mounting portion of the grommet body is gradually reduced from the base end side to the tip end side of the mounting portion. The grommet according to any one of claims 1 to 11, wherein the height of the tip of the mounting portion of the grommet body differs depending on the position of the inner opening in the circumferential direction. The grommet according to any one of claims 1 to 12, wherein the thickness of the peripheral wall portion of the mounting portion of the grommet body differs depending on the position of the inner opening in the circumferential direction. The grommet according to claim 2, wherein the abutting rib member is formed separately from the grommet main body and the inner member. The grommet according to claim 14, wherein an annular positioning groove portion for positioning the contact rib member is provided on the one main surface of the inner plate portion. The 14th aspect of claim 14, wherein a positioning convex portion for positioning the contact rib member is provided on the one main surface of the inner plate portion in a state of being adjacent to the inner peripheral side or the outer peripheral side of the contact rib member. Grommet. A positioning convex portion for positioning the contact rib member is provided on the one main surface of the inner plate portion.
On the bottom surface of the contact rib member, a fitting recess into which the positioning protrusion is fitted is formed.
The grommet according to claim 14, wherein the contact rib member is formed on the positioning convex portion in a state where the fitting concave portion is fitted to the positioning convex portion. The grommet according to claim 14, wherein an extended contact rib portion is provided on the one main surface of the inner plate portion on the inside or outside of the contact rib member. The grommet according to claim 2, wherein the abutting rib members are formed in an annular shape having different sizes from each other, and are provided with a plurality of annular rib portions arranged on the outer peripheral side of the mounting portion and arranged on the outer side in order of each other. .. The mounting portion of the inner member is provided with a first through hole penetrating between the outer peripheral surface and the inner peripheral surface of the mounting portion, and the contact rib member is connected by inserting the first through hole. The grommet according to claim 2, which is integrally formed with the grommet body via a portion. The inner plate portion is provided with a second through hole penetrating between the one main surface and the other main surface, and the contact rib member is provided via a connecting portion through which the second through hole is inserted. The grommet according to claim 2, which is integrally formed with the grommet body. The manufacturing method for manufacturing a grommet according to any one of claims 1 to 13 and 19 to 21.
A molten resin is injected with one of the inner member and the grommet body arranged in a mold for integrally forming the inner member and the grommet body, and the inner member and the grommet body are formed. A method for manufacturing a grommet, in which the mounting portion of the grommet body and the inner member are joined by injection molding the other of them.

Images