JP2009181837A - Grommet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grommet easily and surely removable from a hole of a panel. <P>SOLUTION: The grommet 1 is mounted in the hole 3 of the panel 2. The grommet 1 has a grommet body 10 and a linear member 30. The grommet body 10 has a small-diameter cylinder portion 11 and an enlarged-diameter cylinder portion 12. A locking recessed portion 13 is provided at the other end 12b of the enlarged-diameter cylinder portion 12. The locking recessed portion 13 is locked into the hole 3 of the panel 2. The locking recessed portion 13 is formed by a first wall 14 near the other end 12b of the enlarged-diameter cylinder portion 12, and a second wall 15 near one end 12a of the enlarged-diameter cylinder portion 12, opposed to the first wall 14. At a base end of the first wall 14, a thin portion 18 is provided along the peripheral direction of the enlarged-diameter cylinder portion 12. The linear member 30 has an embedded portion 31 and a protruded portion 32. The embedded portion 31 is embedded over the approximate whole periphery of the inside of the thin portion 18. The protruded portion 32 ranging from the embedded portion 31 is protruded from the inside of the thin portion 18. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a grommet which is attached to a panel constituting a vehicle body such as an automobile as a vehicle and passes a wire harness inside.

  Various grommets have been conventionally used in order to pass a wire harness through a hole provided in a panel constituting a vehicle body such as an automobile as a vehicle and to prevent moisture (liquid) such as water from adhering to the wire harness. Has been used. The grommet is made of an elastic material such as rubber, and is formed in a cylindrical shape. The grommet is provided over the entire circumference on one end side of the grommet body, and is engaged in the hole of the panel. And a locking recess to be stopped.

  In recent years, in view of environmental problems, there has been a demand for separate collection for each part material when dismantling automobiles such as scrap cars, and subsequent disposal and recycling. For this reason, the grommet mentioned above has also been proposed, for example, which is easy to remove from the panel during dismantling work (see, for example, Patent Documents 1 and 2).

  In Patent Document 1, the locking recess is formed by a first wall near one end of the grommet main body and a second wall near the other end of the grommet main body facing the first wall. . Further, the second wall is formed by a thin bag portion filled with pressurized air. At the time of dismantling work, by cutting a part of this thin bag portion with a cutter or the like from the outside, crushing the thin bag portion, reducing the protruding amount of the second wall, and then pulling the grommet from the first wall side, The grommet can be easily removed from the panel.

Moreover, in patent document 2, the cutting blade guide plate is provided in the hole vicinity of the panel to which a grommet is attached. The cutting blade guide plate has a round hole communicating with the hole of the panel, and a square hole provided from the upper position to the lower position of the wire harness passing through the round hole and the hole of the panel and opening upward. is doing. At the time of dismantling work, the wire harness and the grommet can be cut by pulling down a guillotine-like cutting blade or the like in the square hole, and the wire harness and the grommet can be easily removed from the panel.
JP-A-11-262137 JP 2002-247722 A

  However, the grommet described in Patent Document 1 described above has a complicated structure and costs due to the provision of the thin bag portion, and it is necessary to fill the thin bag portion with pressurized air, so the number of work steps is large. There has been a problem that it has become complicated and difficult to manufacture. Further, the cutting blade guide plate described in Patent Document 2 described above needs to be provided corresponding to each of the plurality of holes of the panel, so that the number of parts increases and costs increase, and welding or the like is provided in the vicinity of the holes. Therefore, there is a problem that the number of work steps increases and becomes complicated.

  The present invention aims to solve such problems. That is, an object of the present invention is to provide a grommet that can be easily and reliably removed from the hole of the panel.

  In order to solve the above-mentioned problems and achieve the object, the invention described in claim 1 is a grommet body made of an elastic material and formed in a cylindrical shape to pass a wire harness inside, and one end portion of the grommet body A locking recess provided on a side of the grommet, wherein the grommet body is inserted into a hole of the panel, and the locking recess locks in the hole. A first wall near one end and a second wall near the other end of the grommet body facing the first wall, and the second wall is bent inward to form a hole. And is provided at a base end portion of one of the first wall and the second wall, and includes a thin portion along a circumferential direction of the grommet body. Embedded in the embedded portion and embedded in the embedded portion A grommet which is characterized by comprising a linear member having a a protrusion protruding from the thin portion becomes.

  According to a second aspect of the present invention, in the grommet according to the first aspect, the thin portion is formed by a groove portion that is recessed from an outer surface of the first wall facing the second wall. It is a grommet characterized by that.

  According to the first aspect of the present invention, the thin wall portion is provided at the base end portion of one of the first wall and the second wall and extends along the circumferential direction of the grommet body. Since it has a linear member having an embedded portion embedded over the entire circumference and a protruding portion protruding from the thin portion connected to the embedded portion, the embedded portion is thinned by pulling the protruding portion. And the first wall (or the second wall) can be easily torn from the grommet body to release the locking recesses from being locked into the panel holes. Therefore, the grommet can be easily and reliably removed from the hole in the panel.

  According to the second aspect of the present invention, since the thin portion is formed by the groove portion that is recessed from the outer surface facing the second wall of the first wall, the thin portion is the first wall. It is formed on the side away from the second wall, and the protruding portion of the linear member protrudes from the outer surface on the one end portion side of the grommet body so that the protruding portion can be easily pulled and the thin portion can be easily torn. Therefore, the grommet can be further easily and reliably removed from the hole of the panel.

  Hereinafter, a grommet according to an embodiment of the present invention will be described with reference to FIGS. A grommet 1 according to an embodiment of the present invention is attached to a hole 3 provided in a panel 2 constituting a vehicle body such as an automobile as a vehicle, as shown in FIG.

  The grommet 1 is formed in a cylindrical shape, and passes a wire harness (indicated by a two-dot chain line in FIG. 2) 4 routed inside the automobile. The grommet 1 keeps water tightness between the panel 2 and prevents moisture (liquid) such as water from entering the inside from the space between the panel 2, and moisture (liquid) such as water enters the wire harness 4. ) Is prevented. As shown in FIG. 1 and the like, the grommet 1 includes a grommet main body 10 and a linear member 30.

  The grommet body 10 is made of rubber or the like as an elastic material that can be elastically deformed. As shown in FIG. 2, the grommet body 10 is formed in a cylindrical shape and allows the wire harness 4 to pass therethrough. The grommet body 10 is integrally provided with a small diameter cylindrical portion 11 and an enlarged diameter cylindrical portion 12. The small diameter cylindrical portion 11 is formed in a cylindrical shape, and the wire harness 4 is passed inside. The outer diameter of the small diameter cylindrical portion 11 is smaller than the inner diameter of the hole 3 of the panel 2.

  The enlarged diameter cylindrical portion 12 is formed in a cylindrical shape in which one end portion 12a is connected to the small diameter cylindrical portion 11 and the inner and outer diameters gradually increase as the distance from the small diameter cylindrical portion 11 increases (that is, toward the other end portion 12b). Has been. The enlarged diameter cylindrical portion 12 is arranged coaxially with the small diameter cylindrical portion 11 and is connected to the small diameter cylindrical portion 11 in series. The enlarged diameter cylindrical portion 12 passes the wire harness 4 passing through the small diameter cylindrical portion 11 inward. The outer diameter of the one end portion 12 a of the enlarged diameter cylindrical portion 12 is smaller than the inner diameter of the hole 3 of the panel 2. The outer diameter of the other end portion 12 b of the enlarged diameter cylindrical portion 12 is larger than the inner diameter of the hole 3 of the panel 2.

  In addition, the other end part 12b of the diameter expansion cylinder part 12 is corresponded to the one end part of the grommet main body 10 as described in a claim. The end portion 11a of the small-diameter cylindrical portion 11 away from the enlarged-diameter cylindrical portion 12 corresponds to the other end portion of the grommet body 10 described in the claims.

  The other end portion 12b of the enlarged diameter cylindrical portion 12 is provided with a locking recess 13 over the entire circumference. The locking recess 13 is formed as a recess from the outer surface of the enlarged diameter cylindrical portion 12. As shown in FIG. 2, the locking recess 13 includes a first wall 14 near the other end 12 b of the diameter-expanded cylindrical portion 12 and an axis P (hereinafter simply referred to as a shaft) of the diameter-expanded cylindrical portion 12, that is, the grommet body 10. A second wall 15 near the end portion 11a of the small-diameter cylindrical portion 11 facing the first wall 14 along a direction (center P) (a direction parallel to the axis P), the first wall 14 and the second wall And a concave groove 16 provided between the wall 15 and the wall 15.

  The cross-sectional shape along the axis P direction of the first wall 14 is formed in a rectangular shape. As shown in FIG. 2, the first wall 14 is provided with a lip 17, a thin portion 18, and a groove portion 19. The lip 17 is provided on the outer edge portion of the first wall 14. The lip 17 is formed so as to protrude from the outer surface of the first wall 14 facing the second wall 15 toward the second wall 15. The lip 17 is provided over the entire circumference of the enlarged diameter cylindrical portion 12.

  The thin portion 18 is provided at the proximal end portion of the first wall 14. The thin portion 18 is a portion where the thickness of the first wall 14 along the axis P direction is thin. The thickness of the thin portion 18 along the axis P direction is slightly thicker than the outer diameter of the linear member 30. As shown in FIG. 1, the thin portion 18 is provided in a ring shape along the entire circumference of the enlarged diameter cylindrical portion 12, that is, the grommet body 10. The inner diameter of the thin portion 18 is smaller than the inner diameter of the hole 3 of the panel 2. Further, the thin portion 18 is provided with a perforation 18b penetrating the thin portion 18 along the axis P direction. The perforation 18b is provided along the inner edge and the outer edge of the thin portion 18, and makes the thin portion 18 easy to tear when the linear member 30 is pulled as will be described later.

  The groove part 19 is provided in the base end part of the 1st wall 14, as shown in FIG. The groove portion 19 is provided in a concave shape from the outer surface facing the second wall 15 of the first wall 14. The groove portion 19 is provided in a ring shape over the entire circumference of the enlarged diameter cylindrical portion 12. The groove portion 19 has a U-shaped cross section along the axis P direction. The groove portion 19 is provided along with the thin portion 18 along the axis P direction, and is disposed closer to the second wall 15 than the thin portion 18. A thin portion 18 is formed by the groove portion 19.

  Here, the depth along the axis P direction of the groove portion 19 (that is, the thickness of the thin portion 18) will be described. If the groove portion 19 is too deep, the thin portion 18 becomes too thin, the strength of the first wall 14 is lowered, and the locking recess 13 cannot be firmly locked in the hole 3 of the panel 2, so that the grommet 1 is attached to the panel 2. It will come off. If the groove portion 19 is too shallow, the thin portion 18 becomes too thick and the thin portion 18 cannot be torn even if the linear member 30 is pulled as described later, and the grommet 1 cannot be removed from the panel 2. For this reason, the depth of the groove 19 is set to such a depth that the locking recess 13 can be reliably locked in the hole 3 of the panel 2 and the linear member 30 can reliably tear the thin portion 18. Yes.

  The second wall 15 is provided at the aforementioned other end 12 b of the enlarged diameter cylindrical portion 12 and is disposed closer to the smaller diameter cylindrical portion 11 than the first wall 14. The cross-sectional shape along the axis P direction of the second wall 15 is formed in a triangular shape by two inclined surfaces 15a and 15b. The first inclined surface 15 a is provided on the outer surface of the second wall 15 facing the first wall 14, and is inclined so as to approach the axis P as it approaches the first wall 14. The second inclined surface 15 b is provided on the outer surface of the second wall 15 away from the first wall 14, and is inclined so as to approach the axis P as the distance from the first wall 14 increases.

  The locking recess 13 having the above-described configuration inserts the grommet body 10 into the hole 3 of the panel 2 from the end 11a side of the small diameter cylindrical portion 11 along the axial center P direction, and temporarily expands the second wall 15. The inside of the diameter cylinder part 12 is bent. Then, the edge of the hole 3 of the panel 2 is positioned in the recessed groove 16, and the second wall 15 is returned to the initial state (the state in which the expanded cylindrical portion 12 is not elastically deformed) by the elastic restoring force, It locks in the hole 3 of the panel 2 (FIG. 2). When the locking recess 13 is locked in the hole 3 of the panel 2, the base end of the second wall 15 on the first wall 14 side comes into contact with the edge of the hole 3 of the panel 2, and The space between the edges of the holes 3 is kept watertight. At this time, the lip 17 is in contact with the surface of the panel 2 to keep watertight between the surface of the panel 2.

  The linear member 30 is made of, for example, a synthetic resin, and is made of a material having a strength capable of tearing the thin portion 18 of the grommet body 10 as will be described later. The linear member 30 is insert-molded in the grommet body 10. The linear member 30 is integrally formed with an embedded portion 31 (FIG. 2) and a protruding portion 32 (FIG. 1), and is formed in a long linear shape. The length of the embedded portion 31 is substantially equal to the circumferential length of the thin portion 18. The embedded portion 31 is embedded over substantially the entire circumference in the thin portion 18.

  A pair of projecting portions 32 are provided in series with both ends of the embedded portion 31. When the embedded portion 31 is embedded in the thin portion 18, the protruding portion 32 protrudes from the thin portion 18 to the outer surface on the other end 12 b side of the enlarged diameter cylindrical portion 12. The protruding portion 32 is provided at least as long as it is pinched with a finger or a jig. When the protrusion 32 is pinched and pulled in the direction of arrow A (FIG. 1 and the like) along the circumferential direction of the thin portion 18, the embedded portion 31 is pulled out of the thin portion 18 as shown in FIG. 3. As a result, the thin portion 18 is torn. When the entire length of the embedded portion 31 is pulled out, as shown in FIG. 4, the thin portion 18 is torn about the entire length leaving a part 18a. Thereafter, by pulling the first wall 14 and tearing off the part 18a, the first wall 14 is completely torn off from the enlarged diameter cylindrical portion 12, as shown in FIG.

  When attaching the grommet 1 having the above-described configuration to the panel 2, first, the small-diameter cylindrical portion 11 and the hole 3 of the panel 2 are opposed to each other along the axis P direction, and the grommet body 10 is moved along the axis P direction. The small diameter cylindrical portion 11 is gradually inserted into the hole 3 from the end portion 11a. Then, the second inclined surface 15 b of the second wall 15 contacts the edge of the hole 3 of the panel 2. Further, when the grommet body 10 is inserted (press-fitted) into the hole 3 of the panel 2, the enlarged diameter cylindrical portion 12 is pressed inward by the edge of the hole 3 of the panel 2 so that the inner and outer diameters are reduced. Elastically deforms. The edge of the hole 3 of the panel 2 passes through the first inclined surface 15a and is positioned in the groove 16. Then, the base end of the second wall 15 contacts the edge of the hole 3 of the panel 2 and the lip 17 contacts the surface of the panel 2. Thus, the base end portion of the second wall 15 and the lip 17 are kept watertight between the panel 2, the locking recess 13 is locked in the hole 3 of the panel 2, and the grommet 1 is attached to the panel 2. It is attached.

  When removing the grommet 1 from the panel 2, the protruding portions 32 of the linear members 30 are each pulled along the direction of arrow A in FIG. Then, since the locking recess 13 is locked in the hole 3 of the panel 2, the pulling force acts on the thin portion 18 and the thin portion 18 is torn (FIG. 3). The thin portion 18 is torn substantially in its entire length leaving a part 18a (FIG. 4). Subsequently, by pulling the first wall 14 to completely tear the first wall 14, the outer diameter of the enlarged cylindrical portion 12 near the first wall 14 becomes smaller than the inner diameter of the hole 3 of the panel 2, The locking of the locking recess 13 into the hole 3 of the panel 2 is completely released (FIG. 5). Thereafter, the grommet main body 10, that is, the grommet 1 is easily detached from the panel 2 by pulling the grommet main body 10 from the small diameter cylindrical portion 11 side in the direction of arrow B in FIG.

  According to this embodiment, the thin wall portion 18 is provided along the circumferential direction of the grommet body 10 provided at the proximal end portion of the first wall 14 and embedded in the thin wall portion 18. Since the linear member 30 having the portion 31 and the protruding portion 32 that is connected to the embedded portion 31 and protrudes from within the thin portion 18 is provided, the embedded portion 31 causes the thin portion 18 to be pulled by pulling the protruding portion 32. The first wall 14 can be easily torn off from the grommet body 10 to release the locking of the locking recess 13 into the hole 3 of the panel 2. Therefore, the grommet 1 can be easily and reliably removed from the hole 3 of the panel 2.

  Since the thin portion 18 is formed by the groove portion 19 provided in a concave shape from the outer surface facing the second wall 15 of the first wall 14, the thin portion 18 is the second wall 15 of the first wall 14. The protruding portion 32 of the linear member 30 is protruded from the outer surface on the other end 12b side of the enlarged diameter cylindrical portion 12 so that the protruding portion 32 can be easily pulled and the thin portion 18 can be easily torn. Can do. Therefore, the grommet 1 can be further easily and reliably removed from the hole 3 of the panel 2.

  In the present embodiment, the thin wall portion 18 and the groove portion 19 are provided on the first wall 14. However, in the present invention, the thin portion 18 and the groove portion 19 may be provided on the second wall 15. In this case, it is preferable to embed the embedded portion 31 of the linear member 30 in the thin portion 18 and project the protruding portion 32 from the thin portion 18 toward the one end portion 12 a of the enlarged diameter cylindrical portion 12.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

It is a perspective view which shows the grommet concerning one Embodiment of this invention. It is sectional drawing along the II-II line | wire in FIG. It is a perspective view which shows the state in which the linear member shown by FIG. 1 is being pulled out. FIG. 4 is a perspective view illustrating a state in which the linear member illustrated in FIG. 3 is completely pulled out. It is sectional drawing which shows the state which teared off the 1st wall shown by FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Grommet 2 Panel 3 Hole 4 Wire harness 10 Grommet main body 11a End part of a small diameter cylinder part (the other end part of a grommet main body)
12b The other end of the expanded diameter cylinder (one end of the grommet body)
13 Locking recess 14 First wall 15 Second wall 18 Thin portion 19 Groove portion 30 Linear member 31 Embedded portion 32 Projection portion

Claims (2)

A grommet body made of an elastic material and formed in a cylindrical shape to pass the wire harness inside; and a locking recess provided on one end side of the grommet body, and the grommet body in a hole of the panel In the grommet inserted and the locking recess locked in the hole,
The locking recess is formed by a first wall near one end of the grommet main body and a second wall near the other end of the grommet main body facing the first wall, and the second Bend inward and lock in the hole,
Provided at one base end of the first wall and the second wall, and provided with a thin portion along the circumferential direction of the grommet body,
A grommet comprising: a linear member having an embedded portion embedded over the entire circumference in the thin portion; and a protruding portion that is connected to the embedded portion and protrudes from the thin portion.   2. The grommet according to claim 1, wherein the thin portion is formed by a groove portion that is recessed from an outer surface of the first wall facing the second wall.

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