JP2008051314A - Plug - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plug easily insertable into a hole of a panel, and capable of improving sealability to the hole. <P>SOLUTION: A surface side collar part 15 for blocking up a part between an insertion part 11 and the hole H by being brought into pressure contact with a surface of a car body panel P, and a reverse side collar part 16 for blocking up the part between the insertion part 11 and the hole H by being brought into pressure contact with a reverse surface, are integrally formed in the insertion part 11 of the plug 10. A rib 17 extending in the radial direction to the axis is integrally formed in a plurality on an outer peripheral surface of the reverse side collar part 16 in an axial directional view of the insertion part 11. The rib 17 is formed so that a cross-sectional shape becomes a substantially angle shape in a plane orthogonal to its extending direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a plug that is mounted in a hole, for example, to close a hole formed in a vehicle body panel of a vehicle.

  Conventionally, as this type of plug, for example, there is one disclosed in Patent Document 1. As shown in FIG. 4, the plug 50 includes an insertion cylinder portion 51 that is inserted into a hole H of a vehicle body panel P of a vehicle, for example, and a flange portion 52 is formed on the proximal end side of the insertion cylinder portion 51. At the same time, a plurality of triangular blades 53 are integrally formed on the outer periphery of the insertion tube portion 51 in a state of being inclined with respect to the radial direction of the insertion tube portion 51. Further, an annular seal lip 54 is integrally formed between the flange portion 52 and each blade 53 on the outer periphery of the insertion tube portion 51. And the insertion cylinder part 51 is easily inserted into the hole H by elastically deforming each blade 53 so that each blade 53 comes into contact with the inner periphery of the hole H and falls, and the insertion cylinder part 51 is completely inserted into the hole H. In the state, the vehicle body panel P is sandwiched between the flange portion 52 and each blade 53, and the seal lip 54 contacts the periphery of the hole H.

Further, as shown in FIGS. 5A and 5B, the plug 60 disclosed in Patent Document 2 includes a cylindrical body 61 that is inserted into the hole H of the vehicle body panel P, and an upper end of the cylindrical body 61. A flange 62 is formed. On the outer periphery of the cylindrical body 61, a plurality of bulging portions 63 having an arc-shaped cross section and becoming narrower downward are formed. The cylindrical body 61 is easily inserted into the hole H because each bulging portion 63 is in sliding contact with the inner peripheral surface of the hole H to reduce the contact area. In a state where the cylinder body 61 is inserted into the hole H, the vehicle body panel P is sandwiched between the flange portion 62 and each bulging portion 63.
JP-A-7-71601 JP 2004-156665 A

  The plug 50 of Patent Document 1 is easily mounted by sliding the blades 53 against the holes H of the vehicle body panel P. The plug 60 of Patent Document 2 is also easily mounted by bringing each bulging portion 63 into sliding contact. However, when the plug 50 is mounted in the hole H of the vehicle body panel P, the flange 52 and the seal lip 54 are pressed against the surface of the vehicle body panel P to close the hole H. Only the blades 53 are brought into contact with each other. That is, since the hole H is blocked only on the front surface side of the vehicle body panel P, there is a case where sufficient sealing performance for the hole H cannot be secured. Further, the plug 60 presses the flange portion 62 against the surface of the vehicle body panel P to close the hole H, but only the end surface of each bulging portion 63 is brought into contact with the back surface of the vehicle body panel P. For this reason, since the plug 60 also closes the hole H only on the front surface side of the vehicle body panel P, like the plug 50 of the above-mentioned Patent Document 1, there is a case where sufficient sealing performance for the hole H cannot be secured.

  An object of the present invention is to provide a plug that can be easily inserted into a hole of a panel and can improve the sealing performance for the hole.

  In order to achieve the above object, an invention according to claim 1 includes an insertion portion that is inserted into a hole of a panel, and the insertion portion is pressed against the surface of the panel and includes the insertion portion and the hole. An annular front side collar part that closes the gap and an annular back side collar part that presses against the back surface of the panel and closes between the insertion part and the same hole are integrally formed, and the panel is formed by the front side collar part and the back side collar part. A plurality of ribs extending in a radial direction with respect to the central axis when viewed in the central axis direction of the insertion portion are integrally formed on the outer peripheral surface of the back-side collar portion.

  According to a second aspect of the present invention, in the first aspect of the present invention, the rib has a substantially chevron-shaped cross section in a plane perpendicular to the extending direction.

(Function)
According to the first aspect of the present invention, when the insertion portion is inserted into the hole of the panel, only the plurality of ribs integrally formed on the outer peripheral surface of the back side collar portion are in sliding contact with the inner peripheral surface of the hole. For this reason, the frictional force which arises between the outer peripheral surface of a back side collar part and the inner peripheral surface of a hole is suppressed, and a back side collar part passes the hole smoothly and is arrange | positioned at the back surface side of a panel. Further, in a state where the insertion portion is inserted into the hole, the front side flange is pressed against the surface of the panel, and the back side flange is pressed against the back surface of the panel. Moreover, the rigidity of a back side collar part improves by several ribs, and each collar part is press-contacted to a panel still more strongly. As a result, the front side flange portion closes the insertion portion and the hole on the front surface side of the panel, and the back side flange portion closes the insertion portion and the hole on the back surface side. For this reason, the sealing performance with respect to the hole is improved.

  According to invention of Claim 2, when inserting an insertion part in the hole of a panel, the ridgeline of the rib of a cross-sectional substantially mountain shape slide-contacts with respect to the internal peripheral surface of a hole. For this reason, the frictional force produced between the outer periphery of a back side collar part and the inner periphery of a hole is suppressed effectively, and an insertion part is inserted in a hole while a back side collar part passes a hole smoothly.

  According to this invention, while being able to insert easily with respect to the hole of a panel, the effect which can improve the sealing performance with respect to the hole is exhibited.

Next, a first embodiment of the present invention will be described with reference to FIGS.
The plug 10 shown in FIGS. 1A and 1B is integrally formed of a polymer elastic material. The polymer elastic material is, for example, a synthetic rubber such as ethylene propylene rubber, isoprene rubber, styrene butadiene rubber, or natural rubber. The plug 10 includes a short cylindrical insertion portion 11. The insertion portion 11 is disposed on the inner side of the peripheral wall portion 12, the bottom wall portion 13, and the peripheral wall portion 12 in contact with the inner peripheral edge of the hole H. A pressing portion 14 that protrudes upward from the bottom wall portion 13 is formed. The pressing part 14 is formed in a covered cylindrical shape.

  An annular front side flange 15 is integrally formed at the upper end of the peripheral wall portion 12, and an annular back side flange 16 formed smaller in diameter than the front side flange 15 is integrally formed on the outer periphery of the peripheral wall portion 12. Has been. A plurality of ribs 17 (8 in this embodiment) are integrally formed at equal angular intervals on the outer peripheral surfaces of the peripheral wall portion 12 and the back side flange portion 16 in a radial direction with respect to the central axis line when the insertion portion 11 is viewed in the central axis direction. Yes. As shown in the cross section aa in FIG. 1A, the rib 17 is formed so that a cross-sectional shape in a plane orthogonal to the extending direction thereof is a substantially chevron shape.

  Now, in order to mount the plug 10 in the hole H of the vehicle body panel P as a panel, the lower portion of the insertion portion 11 is disposed in the hole H as shown in FIG. Then, the ridgeline of each rib 17 is in contact with the inner peripheral surface of the hole H. When the plug 10 is pushed in the arrow b direction from this state, the back side flange portion 16 and the peripheral wall portion 12 are elastically deformed so as to bend toward the center side of the insertion portion 11, and the insertion portion 11 is inserted into the hole H. At this time, since only the ridgeline of each rib 17 is in sliding contact with the inner peripheral surface of the hole H, the friction force generated between the plug 10 and the vehicle body panel P is suppressed. When the insertion portion 11 is inserted into the hole H until the front side flange 15 is pressed against the surface of the vehicle body panel P, the back side flange 16 passes through the hole H and returns to the original shape on the back side of the vehicle body panel P. To do. In this state, as shown in FIG. 3, the vehicle body panel P is sandwiched between the front side flange 15 and the back side flange 16. Further, in this state, the front side flange 15 is pressed against the surface of the vehicle body panel P, and the back side flange 16 is pressed against the back surface of the vehicle body panel P. As a result, the front side flange 15 closes the insertion portion 11 and the hole H on the front side of the vehicle body panel P, and the back side flange 16 closes the insertion portion 11 and the hole H on the back side. It is.

The embodiment described above in detail has the following effects.
(1) A plurality of ribs 17 extending in a radial direction with respect to the central axis line when the insertion part 11 is viewed in the central axis direction are integrally formed on the outer peripheral surface of the back-side flange part 16. Therefore, when the insertion portion 11 of the plug 10 is inserted into the hole H of the vehicle body panel P, each rib 17 comes into sliding contact with the inner peripheral surface of the hole H, and the frictional force generated between the plug 10 and the hole H is suppressed. Therefore, the plug 10 can be easily attached to the hole H.

  (2) In a state where the insertion portion 11 is inserted into the hole H, the front side flange portion 15 pressed against the surface of the vehicle body panel P closes the space between the insertion portion 11 and the hole H and presses against the back surface side. The space between the insertion portion 11 and the hole H is closed by the back side flange portion 16 thus formed. Therefore, the sealing performance with respect to the hole H is improved.

  Furthermore, since the rigidity of the back side collar part 16 is improved by the plurality of ribs 17 integrally formed on the back side collar part 16, the front side collar part 15 and the back side collar part 16 are more strongly pressed against the vehicle body panel P. Therefore, the sealing performance with respect to the hole H is further improved.

  (3) Since the cross-sectional shape of the rib 17 is formed in a substantially mountain shape, the contact area with the inner peripheral surface of the hole H is narrowed, and the frictional force generated between them is effectively suppressed. Therefore, since the insertion portion 11 is smoothly inserted into the hole H, the plug 10 can be more easily attached to the hole H.

In addition, this embodiment can also be changed and embodied as follows.
The cross-sectional shape of the rib 17 is a substantially semicircular shape as indicated by a two-dot chain line in the aa cross-sectional view of FIG.

As shown by a two-dot chain line in FIG. 1 (b), the extending direction of the rib 17 is slightly inclined with respect to the radial direction with respect to the central axis when viewed in the central axis direction of the insertion portion 11.
The plug 10 is integrally formed of plastic or thermoplastic elastomer (including dynamically cross-linked thermoplastic elastomer) as a polymer elastic material. When the plug 10 is formed of a thermoplastic elastomer, it can be remolded, so that recyclability is improved.

  The body portion of the plug 10 excluding the rib 17 (that is, including the back flange 16) is formed of a material having a JIS A hardness of 50 to 60 degrees, for example, and the rib 17 is formed of a material having a JIS A hardness of 80 degrees or more, for example. . In this case, the adhesion of the front side flange 15 and the back side flange 16 to the vehicle body panel P is ensured, and the rib 17 itself is not easily deformed so as to be crushed when the plug 10 is inserted into the hole H. An increase in the contact area with respect to the inner periphery of H is suppressed. For this reason, the plug 10 can be more easily inserted into the hole H while ensuring the sealing property of the plug 10.

  As shown by a two-dot chain line in FIG. 1, an annular groove 19 is formed along the inner surface of the bottom wall portion 13. In this case, since the rigidity of the bottom wall portion 13 is weakened by the groove 19, when the plug 10 is inserted into the hole H, the back side flange portion 16 is easily bent together with the peripheral wall portion 12 toward the pressing portion 14. For this reason, the plug 10 becomes easier to attach.

(A) is the side view which carried out the cross section of the part which shows the plug of one Embodiment, (b) is a front view similarly. The schematic diagram for demonstrating the mounting | wearing operation | work of a plug. The side view which carried out the cross section of a part which shows the plug of the state with which the hole of the vehicle body panel was mounted | worn. The side view which carried out the cross section of a part which shows the conventional plug. (A) is the bottom view which shows the conventional plug, (b) is the side view which made the cross section partially the same.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Plug, 11 ... Insertion part, 15 ... Front side collar part, 16 ... Back side collar part, 17 ... Rib, H ... Hole, P ... Vehicle body panel as a panel.

Claims (2)

It has an insertion part to be inserted into the hole of the panel,
An annular front side flange that presses against the surface of the panel to close the space between the insertion portion and the hole, and a pressure contact with the back surface of the panel to close the space between the insertion portion and the hole. Annular and back side collar
While configured to sandwich the panel by the front side collar and the back collar,
A plug characterized in that a plurality of ribs extending in a radial direction with respect to the central axis when viewed in the central axis direction of the insertion portion are integrally formed on the outer peripheral surface of the back side flange.   2. The plug according to claim 1, wherein the rib has a substantially chevron-shaped cross section in a plane orthogonal to the extending direction thereof.

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