JP6799993B2 - 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 passenger compartment).
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.

In the conventional grommet, as described above, since the mounting portion of the grommet body covers the entire inner plate portion, the shape of the inner plate portion and the mounting portion of the grommet body is restricted. For example, 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). Further, the mounting portion of the grommet body is also limited to a shape that easily covers the inner plate portion.

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 shapes of the inner member and the grommet main body.

The present invention is a glomet provided with a glomet 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 being mounted on the glomet body. The inner member is provided in a state of surrounding the inner opening on one main surface of the inner plate portion and the inner plate portion through which the electric wire is inserted, and is attached to the panel opening. It has a tubular mounting portion, and on the other main surface of the inner plate portion, a mounted portion to which the glomet body is mounted is provided so as to surround the inner opening, and the glomet body is the said. It is a grommet having a tubular mounting portion mounted on the mounted portion of the inner member in a state where the inner plate portion is exposed.

As a method of exposing the inner plate portion, at least the outer peripheral end portion of one main surface (main surface on the 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. You just have to expose it.
According to the present invention, the mounting portion of the grommet body is mounted on the mounted portion 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. It is possible to reduce the restrictions on the shape of the mounting portion of the grommet body and improve the degree of freedom of the shape.

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 inner plate portion and the vehicle body panel can be further improved.

Further, as an aspect of the present invention, the mounted portion of the inner member may be formed in an annular shape surrounding the inner opening on the other main surface of the inner plate portion.
According to the present invention, the structure of the mounted portion of the inner member can be simplified.

Further, as an aspect of the present invention, the mounted portion of the inner member is formed in a tubular shape and is erected on the other main surface of the inner plate portion, and the mounted portion of the grommet body is mounted. It may be attached to the outer periphery of the portion.
According to the present invention, the grommet main body can be mounted on the other main surface of the inner plate portion in a positioned state by the mounted portion of the inner member.

Further, as an aspect of the present invention, the grommet main body extends from the mounting portion onto the inner peripheral surface of the mounted portion of the inner plate portion and is in contact with the inner peripheral surface. May have.
According to the present invention, the contact area between the grommet main body and the inner member can be increased by the inner peripheral contact portion of the grommet main body. 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 contact rib member may be integrally formed with the grommet main body via a connecting portion.
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, as an aspect of the present invention, the inner plate portion is provided with a through hole penetrating between the one main surface and the other main surface, and the connecting portion is provided with the grommet main body and the grommet body through the through hole. It may be connected to the abutting rib member.

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

Further, as an aspect of the present invention, the cross-sectional shape of the 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 through hole is a cross-sectional shape when the through hole is cut on a surface parallel to the through hole opening surface of the through hole.

Further, the cross-sectional shape of the through hole may be gradually reduced in diameter from one main surface of the inner plate portion toward the other main surface, or the diameter is gradually increased 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 from one main surface of the inner plate portion. The diameter may be gradually increased until the middle of 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 and the passing flow rate of the molten resin passing through the through hole can be set to desired values.

Further, as an aspect of the present invention, the hole axial direction of the 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. May be good.
According to the present invention, if the hole axis direction of the through hole is inclined outward in the radial direction of the inner opening, it becomes easy to form the contact rib member in a shape inclined outward along the through hole, and conversely. When the hole axis direction of the 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 through hole.

Further, as an aspect of the present invention, the through hole opening surface on the one main surface side of the 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 other main surface of the through hole is assumed to be at the tip of the mounting portion of the grommet body. When a flange portion having a diameter large enough to cover the opening surface of the through hole on the surface side is provided, the flange portion can be limited to the inner peripheral side of the abutting rib member, whereby the flange portion can be provided. The diameter can be made as small as possible.

Further, when the opening on the one main surface side of the through hole is arranged on the outer peripheral side of the contact rib member, the diameter of the inner opening is expanded to the vicinity of the contact rib member without interfering with the connecting portion. be able to.
Further, when the opening on the one main surface side of the through hole is provided directly under the contact rib member, the connecting portion is arranged on one main surface (main surface on the panel side) of the inner plate portion. Since this can be prevented, the wiring of the connecting portion can be simplified.

Further, as an aspect of the present invention, the grommet main body may have a flange portion that extends from the tip end portion of the mounting portion to the outer peripheral side and abuts on the other main surface of the inner plate portion.
The shape of the flange portion is not particularly limited, but may be an annular plate shape.

According to the present invention, the contact area between the grommet body and the inner member can be increased by the flange portion of the grommet body. 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 portion can be strongly pressed against the vehicle body panel by the flange portion, and the waterproofness, dustproof, soundproofing and rattling prevention between the grommet and the vehicle body panel can be prevented. Can be improved.

Further, as an aspect of the present invention, the grommet main body has a flange portion that extends from the tip end portion of the mounting portion to the outer peripheral side and abuts on the other main surface of the inner plate portion, and the flange portion penetrates the flange portion. The opening surface of the through hole of the hole may be covered, and the connecting portion may connect the flange portion and the contact rib member through the through hole.

According to the present invention, the contact area between the grommet body and the inner member can be increased by the flange portion of the grommet body. 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 portion can be strongly pressed against the vehicle body panel by the flange portion, and the waterproofness, dustproof, soundproofing and rattling prevention between the grommet and the vehicle body panel can be prevented. Can be improved.
Further, it is possible to prevent the connecting portion from being arranged on the other main surface of the inner plate portion, and it is possible to simplify the arrangement of the connecting portion.

Further, as an aspect of the present invention, the flange portion is formed in a convex shape in a plan view from the tip end portion of the mounting portion toward the through hole opening surface of the through hole, and the through hole opening surface of the through hole is formed. It may have a convex portion to cover.
According to the present invention, the range in which the flange portion covers the inner plate portion can be limited to the minimum necessary.

Further, as an aspect of the present invention, the contact rib member may be 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, as an aspect of the present invention, an annular positioning groove portion for positioning the contact rib member may be 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 may be 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 convex portion in a state where the fitting recess is fitted to the positioning convex portion.

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 abutting rib members may be formed in an annular shape having different sizes from each other, and may be arranged on the outer peripheral side of the mounting portion and on the outer side in order of each other.

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, the present invention is a manufacturing method for manufacturing the 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 body. In this state, the molten resin is injected and the other of the inner member and the grommet body is injection-molded to join the mounting portion of the grommet body and the mounted portion of the inner member. It is characterized by being a manufacturing method.

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 shapes of the inner member and the grommet main body.

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 sectional view taken along the line AA of FIG. A partially enlarged view of FIG. BB sectional view of FIG. A partial cross-sectional view showing a state in which the grommet is attached to the vehicle body panel. 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. 12 is a sectional view taken along the line CC of FIG. The cross-sectional view which shows the modification of the positioning method of a contact rib member. The cross-sectional view which shows the mold which manufactures the grommet which concerns on 1st Embodiment. (A) is a plan view showing a flange portion of the grommet body, and (b) is a cross-sectional view taken along the line KK of (a). (A) is a cross-sectional view of the inner peripheral contact portion of the grommet body cut along a plane orthogonal to the central axis of the grommet body, and (b) is a cross-sectional view taken along the line LL of (a). FIG. 5 is a cross-sectional view showing a modified example of the mounted portion of the inner member. 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. The perspective view which shows the grommet which concerns on 2nd Embodiment. (A) is a plan view of the grommet according to the second 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. 22 (a) is a cross-sectional view taken along the line EE. A partially enlarged view of FIG. 23. FIG. 23 is a sectional view taken along line FF of FIG. The cross-sectional view which shows the mold which manufactures the grommet which concerns on 2nd 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 line GG 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 HH 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 JJ sectional view 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 7.
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, FIG. 4 is a sectional view taken along the line AA of FIG. 2, FIG. 5 is a partially enlarged view of FIG. 4, FIG. 6 is a sectional view taken along the line BB of FIG. 4, and FIG. 7 is a grommet 1. Is a partial cross-sectional view showing a state in which is attached to the vehicle body panel 3.

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 is provided on one main surface (that is, the main surface on the vehicle body panel side) 51b of the inner plate portion 51 and the inner plate portion 51, and is attached to the panel opening 3a, and the other of the inner plate portion 51. It is provided on the main surface (that is, the main surface on the grommet main body side) 51a, and includes a mounted portion 52 to be mounted on the grommet main body 4.

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 51b and the other main surface 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 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.

Further, on the outer peripheral surface of the mounted portion 52, a plurality of recessed groove portions 52a with which the grommet main body 4 is engaged are provided (see FIG. 6). The concave groove portions 52a are provided from the tip end to the base end of the mounted portion 52 along the tubular axis direction of the mounted portion 52, and are provided at intervals in the circumferential direction of the mounted portion 52.

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.
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, each concave groove portion 54a is 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 is 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 that is mounted on the outer periphery of the mounted portion 52 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 inner peripheral surface 42a of the large-diameter tubular portion 42 has a diameter-expanded portion whose diameter has been expanded in a stepped shape so that the mounted portion 52 of the inner member 5 is fitted on the side opposite to the truncated cone-shaped tubular portion 41 side. 42b is provided (see FIG. 5). The inner peripheral surface of the enlarged diameter portion 42b is provided with a convex portion 42c that fits into the concave groove portion 52a of the mounted portion 52 of the inner plate portion 51 (see FIG. 6). By fitting the concave groove portion 52a and the convex portion 42c, the relative misalignment of the grommet main body 4 and the inner member 5 in the circumferential direction is prevented.

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 inner member 5 is mounted on the grommet main body 4 by fitting the enlarged diameter portion 42b of the mounting portion 42 of the grommet main body 4 to the outer circumference of the mounted portion 52 of the inner member 5. To. In this mounting state, the tip portion of the mounting portion 42 is in contact with the other main surface 51a of the inner plate portion 51, and the entire inner plate portion 51 is exposed. Further, in this mounted state, the mounted portion 42 and the mounted portion 52 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 formed in each part of the inner member 5 (that is, the mounting portion 53, the inner plate portion 51, and the mounted portion 52). By being inserted into the inside and each part of 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), the wires W are mounted on the outer periphery of the plurality of electric wires W (see FIG. 1). ).

Then, the grommet 1 is attached to the panel opening 3a by fitting 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. 7, 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 so as to surround the inner plate portion 51 having the inner opening 51s through which the electric wire W is inserted and the inner opening 51s on one main surface 51b of the inner plate portion 51. It has a tubular mounting portion 53 to be mounted on the panel opening 3a, and is mounted on the grommet main body 4 on the other main surface 51a of the inner plate portion 51 while surrounding the inner opening 51s. A portion 52 is provided, and the grommet main body 4 has a tubular mounting portion 42 mounted on the mounted portion 52 of the inner member 5 with the inner plate portion 51 exposed.

With this configuration, the mounting portion 42 of the grommet main body 4 is mounted on the outer periphery of the mounted portion 52 of the inner member 5 with the inner plate portion 51 exposed. That is, the mounting portion 42 of the grommet main body 4 does not cover the inner plate portion 51. Therefore, restrictions on the shape of the inner plate portion 51 and the mounting portion 42 of the grommet main body 4 can be reduced, and the degree of freedom in the shape can be improved.

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, the mounted portion 52 of the inner member 5 is formed in a tubular shape and is erected on the other main surface 51a of the inner plate portion 51, and the mounted portion 42 of the grommet main body 4 is mounted on the outer periphery of the mounted portion 52. Therefore, the grommet main body 4 can be mounted on the other main surface 51a of the inner plate portion 51 in a positioned state by the mounted portion 52.

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 shapes 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 panel side) 51b, the other main surface (main surface on the grommet side) 51a and the outer circumference of the inner plate portion 51 are exposed. Of the ends, at least the outer peripheral end 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, 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. 9, 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. 9, 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 as in the first embodiment is used. It may be formed in a ring shape. Further, the positioning convex portion 51c may be provided on both the inner peripheral side and the outer peripheral side of the contact rib member 6.

(Modification 3)
In the third modification, as shown in FIG. 10, the positioning convex portion 51c is provided directly below the contact rib member 6 on one main surface 51b of the inner plate portion 51, and is provided on the bottom surface of the contact 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 portions 51c may be formed in a continuous 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 third modification, the fitting of the fitting concave portion 6a and the positioning convex portion 51c can 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 example 4)
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 4, 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 FIG. 11, 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 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 fourth modification, when the contact rib member 6 is fitted inside the tangential spiral positioning convex portion 51c, the contact rib member 6 is rotated along the tangential spiral extended contact rib portion 51f. , 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 4, 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 5)
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. May be good.
In the multiple connecting ring structure shown in FIG. 12, a plurality of contact 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 modified example 5, since the contact rib member 6 includes a plurality of annular rib portions 61, the waterproofness, dustproofing, 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 5, as shown in FIG. 13, the annular rib portions 61 of the multiple connection ring structure may be formed at different heights from each other. In FIG. 13, 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 5, 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 6)
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. 14, 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 annular contact rib member. Then, the contact rib member is positioned at a predetermined position on the main surface 51b by fitting the proximal end side 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 7)
In the first embodiment, the mounting portion 42 of the grommet main body 4 and the mounted portion 52 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. 15, 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 mounting portion 42 of the grommet main body 4 and the mounted portion 52 of the inner member 5 are joined to each other.

According to the modified example 7, the mounting portion 42 of the grommet main body 4 and the mounted portion 52 of the inner member 5 can be joined without using an adhesive. Further, the mounting portion 42 and the mounted portion 52 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 7, 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 8)
In the first embodiment, as shown in FIGS. 16A and 16B, the grommet main body 4 extends from the outer periphery of the tip 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).

According to the modified example 8, the contact area between the grommet main body 4 and the inner member 5 can be increased by the flange portion 44. 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.
Further, since the flange portion 44 is formed in the shape of an annular plate, it covers most of the other main surface 51a of the inner plate portion 51, so that the inner plate portion 51 can be further reinforced.

(Modification 9)
In the first embodiment, as shown in FIG. 17, the grommet main body 4 extends from the inner peripheral surface of the mounting portion 42 to the inner peripheral surface of the mounted portion 52 of the inner plate portion 51, and the mounted portion 52. It may further have an inner peripheral contact portion 45 in contact with the inner peripheral surface of the above.

In FIG. 17, the inner peripheral contact portion 45 is formed in a tubular shape and is arranged concentrically on the inner peripheral side of the mounting portion 42. The base end portion of the inner peripheral contact portion 45 extends radially outward of the inner peripheral contact portion 45 and is connected to the inner peripheral surface of the mounting portion 42. As a result, a space having a substantially U-shaped cross section is formed between the inner 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 outer circumference of the mounted portion 52, the mounted portion 52 fits in the space between the inner peripheral contact portion 45 and the mounting portion 42, and the inner peripheral contact portion 45 The outer peripheral surface is in contact with the inner peripheral surface of the mounted portion 52.

According to the modified example 9, the contact area between the grommet main body 4 and the inner member 5 can be increased by the inner 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.

In the modified example 9, the tip surface 45s of the inner peripheral contact portion 45 is lower than the tip surface 42s of the mounting portion 42, but may be extended to the same height as the tip surface 42s of the mounting portion 42. Further, the inner peripheral contact portion 45 is extended over the inner peripheral surface of the inner opening 51s of the inner plate portion 51, and the tip surface 45s of the inner peripheral contact portion 45 is higher than the tip surface 42s of the mounting portion 42. It may be extended so as to become. Further, the inner peripheral contact portion 45 is extended over the inner peripheral surface of the mounting portion 53, and the tip surface 45s of the inner peripheral contact portion 45 is extended so as to be at the same height as the tip surface 53s of the mounting portion 53. It may be installed.

Further, the thickness of the inner peripheral contact portion 45 may be gradually reduced in a taper shape from the proximal end side to the distal end side of the inner peripheral contact portion 45. Further, the height of the tip of the inner peripheral contact portion 45 may differ depending on the position of the inner opening portion 51s in the circumferential direction. Further, the thickness of the inner peripheral contact portion 45 may differ depending on the position of the inner opening 51s in the circumferential direction.

(Modification example 10)
In the first embodiment, the mounted portion 52 of the inner member 5 is formed in a tubular shape and is erected on the other main surface 51a of the inner plate portion 51. As shown in FIG. 18, the mounted portion 52 is mounted. May be formed in an annular shape surrounding the inner opening 51s on the other main surface 51a of the inner plate 51. In this case, the mounting portion 42 of the grommet main body 4 is directly mounted on the other main surface 51a of the inner plate portion 51 while surrounding the inner opening 51s. In the modified example 10, the enlarged diameter portion 42b of the mounting portion 42 is omitted.
According to the modification 10, the structure of the mounted portion 52 of the inner member 5 can be simplified.

In FIG. 18, a flange is provided on the outer periphery of the tip of the mounting portion 42 in order to increase the contact area between the grommet main body 4 and the inner plate portion 51 and firmly join the grommet main body 4 and the inner plate portion 51. Although the portion 44 is provided, the flange portion 44 may be omitted.

(Modification 11)
In the first embodiment, the contour of the inner plate portion 51 in a plan view is formed in a circular shape, but the shape is not limited to this, and as shown in FIG. 19, the inner opening portion is formed on the outer circumference of the inner plate portion 51. It may have a shape in which one or more concave portions 51e (one in FIG. 19) are provided, which are recessed toward 51s.

(Modification 12)
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. A small-diameter tubular portion 43 provided in the small-diameter opening 41b of the tubular portion 41 is provided, but as shown in FIG. 20, a large-diameter opening 41a and a 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, the second embodiment of the present invention will be described with reference to FIGS. 21 to 26.
21 is a perspective view showing the grommet 1B according to the second embodiment, FIG. 22 is a plan view of the grommet 1B as viewed from the mounting portion 53 side (that is, the vehicle body panel 3 side), and FIG. 23 is a view. 22 (a) is a sectional view taken along the line EE, FIG. 24 is a partially enlarged view of FIG. 23, FIG. 25 is a sectional view taken along the line FF of FIG. 23, and FIG. 26 shows a grommet 1B. It is sectional drawing which shows the mold K2 for this.

As shown in FIGS. 21 to 25, the grommet 1B according to the second embodiment is the grommet 1 of the first embodiment in which the contact rib member 6 and the grommet main body 4 are integrally formed via a connecting portion 70. Is. 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 second 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 second 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 D 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 D 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 second embodiment, a ring plate-shaped (for example, annular plate-shaped) flange portion 44 extending toward the outer peripheral side of the mounting portion 42 is provided on the outer periphery of the tip end portion of the mounting portion 42 of the grommet main body 4. 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. 25).

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 that overlaps the base end surface of the contact rib member 6 (that is, the portion that overlaps 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 through hole 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 1B will be described with reference to FIG. 26.
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 second embodiment, the contact rib member 6 is integrally formed with the grommet main body 4 via the connecting portion 70. In other words, the contact rib member 6 is fixed to the grommet body 4 via the connecting portion 70. Therefore, it is possible to prevent the abutting rib member 6 from being displaced in the inner plate portion 51. 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 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 and the contact rib member 6 through the through hole 71. In order to connect the connecting portion 70 and the contact 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. 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, the grommet main body 4 has a flange portion 44 extending from the tip end portion of the mounting portion 42 to the outer peripheral side and abutting on the other main surface 51a of the inner plate portion 51, and the flange portion 44 is a through hole 71. On the other hand, the through hole opening surface on the main surface 51a side is covered, and the connecting portion 70 connects the flange portion 44 and the contact rib member 6 through the through hole 71.

With this configuration, 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 joined.

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 1B and the vehicle body panel 3 is improved. Dustproof, soundproof and rattling prevention can be improved.

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.
Further, since the flange portion 44 is formed in the shape of an annular plate, it covers most of the other main surface 51a of the inner plate portion 51, so that the inner plate portion 51 can be further reinforced.

Hereinafter, a modified example of the second embodiment will be described.
(Modification example 1)
In the second embodiment, the cross-sectional shape D 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. 27A, the cross-sectional shape D 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. 27B, the cross-sectional shape D 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. 27 (c), the cross-sectional shape D 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 one main surface is gradually reduced from that middle. The diameter may be gradually increased up to the surface 51b. Alternatively, as shown in FIG. 27 (d), the cross-sectional shape D 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 D 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 second 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. 28A, 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 second embodiment, but as shown in FIG. 28A, 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. 28B, 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 portion 51 toward the one main surface 51b. It may be tilted inward. In this case as well, as shown in FIG. 28B, 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 second 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. 29A and 29B, the through-hole opening surface 71a of each through-hole 71 is stretched directly below the contact rib member 6 (that is, on the inner peripheral side and the outer peripheral side of the contact rib member 6). It may be arranged (so as not to come out). In this case as well, as in the case of the second 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. 30A and 30B, 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. 31A and 31B, 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 water rib member 6, and the contact rib member 6 is arranged. It is connected to the outer peripheral surface of.

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 second 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. 32, 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.

(Modification 5)
In the manufacturing method of the second embodiment, the inner member 5 is formed in advance, and the grommet main body 4, the contact rib member 6, and the connecting portion are arranged in the state where the inner member 5 is arranged in the cavity K2a of the mold K2. The molten resin for forming the 70 was injected to inject the grommet main body 4, the abutting rib member 6 and the connecting portion 70, but conversely, the integrally formed grommet main body 4, the abutting rib member 6 and the connecting portion 70 were injected. A molten resin for forming the inner member 5 in a state where the grommet body 4, the abutting rib member 6, and the connecting portion 70 are integrally formed in the cavity K2a of the mold K2 in which the 70 is formed in advance. May be injected to inject the inner member 5. Even in this way, the same effect as the production method in the second embodiment can be obtained.

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 ... Inner peripheral contact part 5 ... Inner member 6 ... Contact rib member 51 ... Inner plate part 51c ... Positioning convex part 51d ... Positioning groove part 51s ... Inner opening 52 ... Mounted part 53 ... Mounting part 70 ... Connecting part 71 ... Through hole 71a ... Through hole opening surface D ... Cross-sectional shape K1, K2 ... Mold P ... Hole axis direction W ... Electric wire

Claims (20)

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
An inner plate portion having an inner opening through which the electric wire is inserted,
It has a tubular mounting portion that is provided on one main surface of the inner plate portion so as to surround the inner opening and is attached to the panel opening.
On the other main surface of the inner plate portion, a mounted portion to which the grommet main body is mounted is provided so as to surround the inner opening.
The grommet body is a grommet having a tubular mounting portion mounted on the mounted portion of the inner member 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 according to claim 1 or 2, wherein the mounted portion of the inner member is formed in an annular shape surrounding the inner opening on the other main surface of the inner plate portion. The mounted portion of the inner member is formed in a tubular shape and is erected on the other main surface of the inner plate portion.
The grommet according to claim 1 or 2, wherein the mounting portion of the grommet body is mounted on the outer periphery of the mounted portion. The fourth aspect of the present invention, wherein the grommet body extends from the mounting portion onto the inner peripheral surface of the mounted portion of the inner plate portion and has an inner peripheral contact portion that abuts on the inner peripheral surface. Grommet. The grommet according to claim 2, wherein the abutting rib member is integrally formed with the grommet body via a connecting portion. The inner plate portion is provided with a through hole penetrating between the one main surface and the other main surface.
The connecting portion connects the grommet main body and the contact rib member through the through hole.
The grommet according to請Motomeko 6. The grommet according to claim 7, wherein the cross-sectional shape of the through hole changes from the one main surface of the inner plate portion toward the other main surface. Claim 7 or claim 8 in which the hole axis direction of the 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. The grommet described in. The grommet according to any one of claims 7 to 9, wherein the through hole opening surface on the one main surface side of the through hole is arranged on the inner peripheral side, the outer peripheral side, or directly below the contact rib member. .. The grommet body according to any one of claims 1 to 10, wherein the grommet body extends from the tip end portion of the mounting portion to the outer peripheral side and has a flange portion that abuts on the other main surface of the inner plate portion. Grommet. The grommet body has a flange portion that extends from the tip end portion of the mounting portion to the outer peripheral side and abuts on the other main surface of the inner plate portion.
The flange portion covers the through-hole opening surface of the through-hole, and the flange portion covers the through-hole opening surface.
The grommet according to any one of claims 8 to 10 , wherein the connecting portion connects the flange portion and the contact rib member through the through hole. The flange portion is formed in a convex shape in a plan view from the tip end portion of the mounting portion toward the through hole opening surface of the through hole, and has a convex portion that covers the through hole opening surface of the through hole. Item 12. The grommet according to item 12. 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 arranged on the outer peripheral side of the mounting portion and arranged on the outer side in order of each other. A method of manufacturing the grommet according to claims 1 to one of claims 13 and claims 1-9,
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 mounted portion of the inner member are joined by injection molding the other of the grommets.

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