JP2019088155A - Grommet and grommet attachment structure - Google Patents

Abstract

To provide a grommet which can be easily assembled to a panel member and enables improvement of water cut-off performance, and to provide a grommet attachment structure including the grommet.SOLUTION: When a grommet 1 is attached to a panel member 100, a tip of an annular lip part 32 is located at the radial inner side relative to an outer peripheral edge of an inner flange part 201 to make water less likely to spill onto the tip of the annular lip part 32 when the water scatters on the grommet 1 attached to the panel member 100. The structure inhibits the annular lip part 32 from being deformed by water pressure to make a gap less likely to occur between the annular lip part 32 and the panel member 100 and thus improve water cut-off performance. It is not necessary that the annular lip part 32 is pushed hard to the panel member 100 and the grommet 1 can be easily assembled to the panel member 100.SELECTED DRAWING: Figure 3

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a grommet attached to a mounting hole of a panel member and a grommet mounting structure.

  When providing a wire to supply power to a door or the like in a vehicle, a grommet may be provided to protect the wire from water. For example, in a hatchback type vehicle, a grommet covering an electric wire is attached at one end to a panel on the vehicle body side near the hinge portion of the back door and at the other end to a panel on the door side.

  As such a grommet, there has been proposed one in which a flange portion facing the panel and an annular lip portion in contact with the opening edge portion (flat surface portion) of the mounting hole abut each other (see, for example, Patent Document 1) ). In the grommet described in Patent Document 1, the flange portion and the annular lip portion abut each other, and the annular lip portion is sandwiched between the flange portion and the panel. Thus, the annular lip is strongly pressed against the opening edge.

JP, 2014-33564, A

  However, in the grommet as described in Patent Document 1, although the annular lip can be strongly pressed against the panel, the force required to attach the grommet to the panel becomes large. On the other hand, if the force for pressing the flange portion and the annular lip portion is reduced, the force required for attachment can be reduced, but the force for pressing the annular lip portion against the panel is also reduced, and the water blocking performance is reduced.

  An object of the present invention is to provide a grommet which can be easily assembled to a panel member and which can improve the waterproof performance, and a grommet mounting structure provided with the grommet.

  The grommet according to the present invention is a grommet formed in a tubular shape so as to cover an electric wire and attached to the mounting hole of the panel member, wherein a flange portion facing the panel member and a flat portion around the mounting hole And an inner member attached to the grommet main body and made of a member harder than the grommet main body, the inner member being accommodated in the flange The annular lip extends obliquely from the inner periphery of the flange to the outside towards the panel member, and when it is attached to the panel member, the annular lip The tip of the lip portion is located radially inward of the outer peripheral edge of the inner flange portion.

  The grommet mounting structure of the present invention is a grommet mounting structure in which a grommet formed in a cylindrical shape so as to cover an electric wire is mounted in a mounting hole of a panel member, and the grommet is a flange portion facing the panel member; And a grommet main body having an annular lip resiliently contacting a flat surface around the mounting hole, and an inner member mounted on the grommet main body and made of a member harder than the grommet main body, The inner member has an inner flange portion accommodated in the flange portion, and the annular lip portion is inclined and extended so as to extend outward from the inner peripheral portion of the flange portion toward the panel member, and the grommet Is attached to the panel member, the tip of the annular lip portion is the outer peripheral edge of the inner flange portion Characterized in that positioned in Rimo径 inward.

  According to such a grommet of the present invention, the grommet attached to the panel member by the tip of the annular lip being positioned radially inward of the outer peripheral edge of the inner flange when attached to the panel member. When the water is sprayed, it is difficult for water to be directly applied to the tip of the annular lip. Therefore, it is suppressed that an annular lip part deform | transforms by water pressure, it is hard to produce a clearance gap between panel members, and can improve water stop performance. At this time, the annular lip portion does not have to be strongly pressed against the panel member, and can be easily assembled to the panel member.

  Further, according to the grommet mounting structure of the present invention, since the grommet has the above configuration, the grommet can be easily assembled to the panel member, and the water blocking performance is improved. Can do

It is a perspective view showing a grommet concerning an embodiment of the present invention. It is sectional drawing which shows the principal part of the said grommet. It is sectional drawing which shows a mode that the said grommet was attached to the panel member.

  Hereinafter, embodiments of the present invention will be described based on the drawings. FIG. 1 is a perspective view showing a grommet 1 according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing the main part of the grommet 1, and FIG. 3 shows a state where the grommet 1 is attached to a panel member 100. It is sectional drawing which shows.

  The grommet 1 of this embodiment is formed in a cylindrical shape so as to cover the electric wire and is attached to the mounting hole of the panel member, and for example, in a vehicle having a hatchback type backdoor, a hinge of the backdoor It is provided near the department. The grommet 1 is provided with the grommet main body 10 and the inner member 200, as shown in FIG. The grommet main body 10 includes a corrugated tube portion 2 through which an electric wire is inserted and an attaching portion 3 attached to a panel member, and is integrally formed of, for example, a soft resin. The mounting portions 3 are provided at both ends of the corrugated tube portion 2 and are attached to, for example, a panel member on the vehicle body side and a panel member on the door side, but in the present embodiment, both mounting portions 3 have the same configuration. Shall have

  The corrugated tube portion 2 is bendable and stretchable by being formed in a bellows shape. That is, the corrugated tube portion 2 is appropriately deformed according to the opening and closing of the back door.

  The mounting portion 3 is formed in a tubular shape in which the panel member side is open, and has an oval shape as viewed from the panel member. On the opening side of the mounting portion 3, as shown in FIGS. 2 and 3, a flange portion 31 facing the panel member 100 and an annular lip portion 32 extending from the inner peripheral portion 311 of the flange portion 31 toward the panel member 100 And are being formed.

  The flange portion 31 is a portion having a diameter larger than that of the other portion of the mounting portion 3, and is formed in a hook shape along the panel member 100. A concave inner member housing portion 312 is formed on the inner diameter side of the flange portion 31. An inner flange portion 201 described later of the inner member 200 is accommodated in the inner member accommodation portion 312.

  The inner member 200 is a member which is disposed on the inner side in the radial direction of the mounting portion 3 of the grommet 1 and through which a wire is inserted, and is made of a resin harder than the grommet 1. The inner member 200 has an inner flange portion 201, a cylindrical portion 202, and a locking portion 203 in this order along the direction from the grommet 1 toward the panel member 100.

  The inner flange portion 201 is formed to have a diameter larger than that of the mounting hole 101 and faces the panel member 100. Further, the inner member 200 is attached to the attachment portion 3 by the inner flange portion 201 being accommodated in the inner member accommodation portion 312. The cylindrical portion 202 is formed smaller in diameter than the mounting hole 101 so as to be able to be inserted into the mounting hole 101. The locking portion 203 has an inclination such that the tip end has a smaller diameter, and the outermost diameter is larger than the inner diameter of the mounting hole 101. That is, by inserting the locking portion 203 into the mounting hole 101, the locking portion 203 is locked to the inner surface (surface opposite to the grommet main body 10 side) of the panel member 100.

  Thus, the grommet 1 is configured to be attached to the panel member 100 by providing the inner member 200. Further, a part of the grommet main body 10 and the periphery of the mounting hole 101 in the panel member 100 are sandwiched by the inner flange portion 201 and the locking portion 203.

  The annular lip portion 32 secures waterproofness by elastically contacting the flat portion 102 around the mounting hole 101 in the panel member 100. The annular lip portion 32 extends obliquely from the inner peripheral portion of the flange portion 31 so as to extend outward toward the panel member, and contacts the flat portion 102 of the panel member 100 at its tip. The annular lip portion 32 directly extends from the inner peripheral portion of the flange portion 31, and an acute angle is formed between the flange portion 31 and the annular lip portion 32. The extension direction dimension L 1 of the annular lip portion 32 is smaller than the protrusion dimension L 2 of one side of the inner flange portion 201. Therefore, even when the annular lip portion 32 is deformed to a maximum extent to approach the flange portion 31, the tip of the annular lip 32 is positioned radially inward of the outer peripheral edge of the inner flange portion 201. .

  Here, the deformation of the annular lip portion 32 when the grommet 1 is attached to the panel member 100 will be described based on FIG. The thickness of the panel member 100 is larger than the distance between the annular lip portion 32 and the locking portion 203 before deformation. A grommet mounting structure 300 is obtained by attaching the grommet 1 to such a panel member 100. In the grommet mounting structure 300, the annular lip portion 32 is deformed so that its tip approaches the flange portion 31 as compared with the state before mounting. At this time, the tip of the annular lip 32 is located radially inward of the outer peripheral edge of the inner flange portion 201.

  The surface on the panel member 100 side of the flange portion 31 is formed flat (that is, it does not have a projection or the like), and the flange portion 31 side of the annular lip portion 32 is formed flat (that is, it is not Not having projections or the like). As a result, the flange portion 31 and the deformed annular lip portion 32 do not come in contact with each other.

  According to such an embodiment, the following effects can be obtained. That is, when the grommet 1 is attached to the panel member 100, the tip of the annular lip 32 is positioned radially inward of the outer peripheral edge of the inner flange portion 201, whereby the grommet 1 attached to the panel member 100 is On the other hand, when the water is sprayed, the tip of the annular lip portion 32 is unlikely to get water directly. Therefore, deformation of the annular lip portion 32 due to water pressure is suppressed, a gap is hardly generated between the panel member 100, and the water blocking performance can be improved. At this time, it is not necessary to strongly press the annular lip portion 32 against the panel member 100, and the grommet 1 can be easily assembled to the panel member 100.

  Further, when the grommet 1 is attached to the panel member 100, the annular lip portion 32 further approaches the flange portion 31 because the tip of the annular lip portion 32 is not in contact with the flange portion 31. The grommet 1 can be attached to panel members of different thickness.

  In addition, this invention is not limited to the said embodiment, The other modification etc. which can achieve the objective of this invention are included, and the modification as shown below is also included in this invention.

  For example, in the above embodiment, when the grommet 1 is attached to the panel member 100, the tip of the annular lip portion 32 and the flange portion 31 do not come in contact with each other. That is, by providing a projection on the surface of the flange portion on the panel member side, the flange portion side of the annular lip portion, or adjusting the distance between the flange portion and the locking portion and the thickness of the annular lip portion, When the grommet is attached to the panel member having a predetermined thickness, the tip of the annular lip portion may be in contact with the flange portion. According to such a configuration, it is possible to improve the water blocking performance by increasing the force pressing the annular lip against the panel member.

  Besides, the best configuration, method and the like for carrying out the present invention are disclosed in the above description, but the present invention is not limited to this. That is, although the present invention has been particularly illustrated and described primarily with respect to particular embodiments, it should be understood that the present invention may be configured relative to the above-described embodiments without departing from the scope of the inventive concept and object. Those skilled in the art can make various modifications in materials, quantities, and other detailed configurations. Therefore, the description with the above-described disclosure of the shape, the material, etc. is exemplarily described for facilitating the understanding of the present invention, and is not intended to limit the present invention. The description in the name of a member from which some or all of the limitations such as the limitation have been removed is included in the present invention.

DESCRIPTION OF SYMBOLS 1 grommet 10 grommet main body 31 flange part 32 annular lip part 100 panel member 101 mounting hole 102 flat part 200 inner member 201 inner flange part 300 grommet attachment structure

Claims (3)

A grommet formed in a tubular shape so as to cover an electric wire and attached to a mounting hole of a panel member,
A grommet body having a flange portion facing the panel member, and an annular lip portion resiliently contacting a flat portion around the mounting hole;
And an inner member attached to the grommet main body and made of a member harder than the grommet main body,
The inner member has an inner flange portion accommodated in the flange portion,
The annular lip extends obliquely from the inner periphery of the flange toward the panel member,
A grommet characterized in that when attached to the panel member, the tip of the annular lip portion is positioned radially inward of the outer peripheral edge of the inner flange portion.   The grommet according to claim 1, characterized in that the tip end of the annular lip portion and the flange portion are not in contact when attached to the panel member. A grommet mounting structure in which a grommet formed in a tubular shape so as to cover an electric wire is mounted in a mounting hole of a panel member,
The grommet is attached to the grommet main body having a flange portion facing the panel member and an annular lip portion resiliently contacting a flat portion around the mounting hole, and is attached to the grommet main body and harder than the grommet main body An inner member constituted by the members;
The inner member has an inner flange portion accommodated in the flange portion,
The annular lip extends obliquely from the inner periphery of the flange toward the panel member,
A grommet mounting structure according to claim 1, wherein when the grommet is attached to the panel member, a tip of the annular lip portion is positioned radially inward of an outer peripheral edge of the inner flange portion.

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