JP2007120529A - Fastener - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To maintain a proper sealing function while permitting the deformation of a sealing body when packaged or preventing the plastic deformation in a used condition without increasing cost. <P>SOLUTION: This fastener comprises a fastener body (a belt clamp 10) integrally formed of a highly rigid raw material and having a base 16 and a locking leg 24, and the sealing body 30 formed of a soft raw material having high sealing performance and integrated with the base 16 to encircle the locking leg 24. By inserting the locking leg 24 into a mounting hole of a panel, the fastener body is mounted on the panel in a state of putting the sealing body 30 in close contact with the periphery of the mounting hole. A reinforcing part (a reinforcing rib 18) integrally formed with the base 16 can be elastically flexed on the base 16. The reinforcing part is located in a state of supporting the peripheral face of the sealing body 30 at its outside. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a fastener that is attached in a state in which a sealing property is maintained with respect to, for example, an attachment hole formed in a vehicle body panel.

This type of fastener includes a fastener body formed of a highly rigid polypropylene (PP) or the like, and a seal body formed of a flexible elastomer or the like. The fastener body has a locking leg that is inserted into the mounting hole of the panel. The seal body is integrated with the fastener body so as to surround the periphery of the locking leg. Therefore, by inserting the locking leg of the fastener main body into the attachment hole of the panel, the fastener main body is attached to the panel in a state where the seal body is in close contact with the panel around the attachment hole. In addition, the general technique regarding this kind of fastener is disclosed by patent document 1, for example.
JP 7-274357 A

  The seal body formed of a flexible material to have a sealing function may be deformed by packaging for transportation, or may be plastically deformed while pressed against the panel in the usage state of the fastener. The sealing function of is reduced. Although it is conceivable that the thickness of the sealing body is increased to make it difficult for plastic deformation to occur, for example, since elastomer is a relatively expensive material, the cost of the fastener is increased.

  The present invention is intended to solve such a problem, and its purpose is to prevent the seal body from being deformed at the time of packing or plastically deforming in use without causing an increase in cost. It is to hold properly.

The present invention is for achieving the above object, and is configured as follows.
According to the first aspect of the present invention, the fastener main body integrally formed of a highly rigid material has a substrate and a locking leg protruding from one side surface of the substrate, and has a flexible and highly sealing property. The seal body formed by the material is integrated with the substrate so as to surround the periphery of the locking leg of the fastener body, and the locking leg is inserted into the mounting hole of the panel which is the mating member. The fastener is of a type in which the fastener body is attached to the panel in a state where the seal body is in close contact with the panel at the periphery, and a reinforcing portion is provided integrally with the substrate of the fastener body. The reinforcing portion can be bent by elasticity with respect to the substrate, and is positioned in a state where the peripheral surface of the seal body is supported from the outside.

  By providing a reinforcing portion for the seal body in this way, the seal body for securing the sealability between the fastener body and the panel mounting hole is deformed at the time of packing or plastically deformed in the use state. Is prevented. For this reason, while being able to maintain a sealing function appropriately, the cost increase of a fastener can be suppressed.

The invention according to claim 2 is the fastener according to claim 1, wherein the reinforcing portion is continuously provided in the outer peripheral direction of the seal body, and the distal end portion of the reinforcing portion is formed by the seal body. Wrapped up.
Thereby, a deformation | transformation of a sealing body can be prevented, without impairing sealing performance.

The best mode for carrying out the present invention will be described below with reference to the drawings.
(Embodiment 1)
First, the first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a perspective view of a belt clamp shown as an example of a fastener. FIG. 2 is an enlarged perspective view of a part of the belt clamp. FIG. 3 is an enlarged cross-sectional view of a part of the belt clamp. The belt clamp 10 shown in these drawings is used for mounting a wire harness on a vehicle body along a predetermined wiring path.

  The belt clamp 10 main body (fastener main body) is an integrally molded product made of a highly rigid resin material such as polypropylene (PP), and its configuration is roughly divided into a buckle 12, a belt 20, and locking legs 24. The base end of the belt 20 is coupled to the buckle 12 and one side (the lower surface in FIGS. 2 and 3), and the other surface (the upper surface in FIGS. 2 and 3) is a substrate 16 having a predetermined thickness. . A locking leg 24 is located at a substantially central portion of the substrate 16 so as to protrude from the substrate 16.

  The buckle 12 includes a belt insertion portion 13 for allowing the belt 20 to be inserted from the tip side. Inside the belt insertion portion 13, a suitable engagement claw 14 protruding from the inner wall on the substrate 16 side is located (FIG. 3). The engaging claws 14 can be displaced in a minute range in the vertical direction of FIG. 3 by the elasticity (flexure) of the resin. The engaging claw 14 includes a plurality of (two) engaging protrusions 15 that can engage with the engaging tooth row 22 of the belt 20.

  The engagement tooth rows 22 of the belt 20 are arranged at a constant pitch in the length direction on one side surface of the belt 20. By inserting the belt 20 through the belt insertion portion 13 of the buckle 12 from the left side in FIG. 3, a part (two) of the engagement tooth rows 22 is selectively formed on both engagement protrusions 15 of the engagement claw 14. Engage.

  The locking leg 24 includes a pair of locking arms 25 located on both sides thereof. These locking arms 25 respectively project outward from the locking legs 24 and can be displaced in the left-right direction in FIG. 3 by the elasticity (deflection) of the resin. When the locking legs 24 are inserted into the mounting holes 42 of the panel 40 shown in FIG. 3, the both locking arms 25 pass through the mounting holes 42 while being bent, and the shoulder portions of the both locking arms 25 on the opposite surface of the panel 40. Can be locked to the edge of the mounting hole 42.

  The substrate 16 is provided with a dish-shaped seal body 30 surrounding the periphery of the locking leg 24. The seal body 30 is formed integrally with the substrate 16 by a material having flexibility suitable for sealing such as an elastomer. That is, the belt clamp 10 and the seal body 30 are integrated by multicolor molding, and the seal body 30 is molded of an elastomer or the like using the substrate 16 of the belt clamp 10 molded of PP resin or the like as a part of a molding die. .

  The seal body 30 includes inner and outer double lip portions 32 and 33, and the outer lip portion 32 constitutes the peripheral surface of the seal body 30. On the other hand, the substrate 16 includes a plurality of reinforcing ribs 18 arranged at regular intervals along the outer periphery of the seal body 30. These reinforcing ribs 18 can be bent inward and outward of the sealing body 30 with respect to the substrate 16 by the elasticity (flexure) of the resin. Each reinforcing rib 18 is located in a state where the peripheral surface of the seal body 30, that is, the outer lip portion 32 is supported from the outside.

  Thus, by supporting the lip portion 32 of the seal body 30 from the outside by the reinforcing ribs 18, the seal body 30 is prevented from being deformed into an abnormal state when the belt clamp 10 is packed. Further, in the use state of the belt clamp 10 described below, it is possible to prevent plastic deformation from occurring in a state where the seal body 30 is in close contact with the surface of the panel 40. Each reinforcing rib 18 corresponds to a “reinforcing portion” of the present invention.

  When the belt clamp 10 is used, the belt 20 is inserted into the belt insertion portion 13 of the buckle 12 from the front end side while the belt 20 is wound around the outer periphery of a wire harness or the like. As is well known, when the outer periphery of a wire harness or the like is tightened by the belt 20, the engaging tooth row 22 of the belt 20 engages with both engaging protrusions 15 while bending the engaging claw 14 in the belt insertion portion 13. Move without When the tightening of the belt 20 is stopped, a part (two) of the engaging tooth rows 22 are engaged with the engaging protrusions 15 and the belt 20 is held so as not to loosen.

  Subsequently, the locking leg 24 of the belt clamp 10 is inserted into the mounting hole 42 of the panel 40 shown in FIG. As a result, both the locking arms 25 of the locking leg 24 pass through the mounting hole 42 while being bent, and the shoulders of the both locking arms 25 are locked to the edge of the mounting hole 42 on the opposite side of the panel 40, and the belt clamp 10. Is attached to the panel 40 together with a wire harness or the like.

  In this state, the inner and outer lip portions 32 and 33 in the seal body 30 are flexibly deformed by interfering with the surface of the panel 40. At this time, the outer lip portion 32 is deformed while bending the reinforcing ribs 18. As a result, the lip portions 32 and 33 of the seal body 30 are in close contact with the surface of the panel 40 around the mounting hole 42, and perform a sealing function between the locking leg 24 and the mounting hole 42. The seal body 30 also functions as a stabilizer that stabilizes the attachment state of the belt clamp 10 to the panel 40.

(Embodiment 2)
Next, a second embodiment of the present invention will be described with reference to FIGS.
FIG. 4 is a perspective view showing a part of the belt clamp in the second embodiment. FIG. 5 is an enlarged cross-sectional view showing a part of FIG. As shown in these drawings, the substrate 16 of the belt clamp 10 in the present embodiment includes a dish-shaped reinforcing wall 118 (reinforcing portion) that is continuous along the outer periphery of the seal body 30. The reinforcing wall 118 is also located in a state in which the peripheral surface of the seal body 30, that is, the outer lip portion 32 is supported from the outside, and the seal body 30 with respect to the substrate 16 due to elasticity (flexure) of the resin. It is possible to bend inward and outward. As a result, the same function as in the first embodiment can be obtained.

  FIG. 6 is a cross-sectional view showing a modification of the second embodiment corresponding to FIG. In the example shown in this drawing, the distal end portion of the reinforcing wall 118 is wrapped by the outer lip portion 32 of the seal body 30. Thereby, it is possible to prevent the deformation of the seal body 30 as in the first embodiment while maintaining the sealing performance of the seal body 30 appropriately.

Perspective view of belt clamp shown as an example of a fastener The perspective view which expanded and expressed a part of the belt clamp Sectional view showing a part of the belt clamp on an enlarged scale The perspective view showing a part of belt clamp in Embodiment 2 Enlarged sectional view showing a part of FIG. Sectional drawing which represented the example of a change in Embodiment 2 corresponding to FIG.

Explanation of symbols

10 Belt clamp 16 Substrate 18 Reinforcement rib (reinforcement part)
24 Locking leg 30 Sealing body 40 Panel 42 Mounting hole

Claims (2)

  A fastener body integrally formed of a highly rigid material has a substrate and a locking leg protruding from one side surface of the substrate, and a sealing body formed of a flexible material having high sealing performance is provided. It is integrated with the substrate so as to surround the periphery of the locking leg of the fastener body, and the sealing body is brought into close contact with the panel around the mounting hole by inserting the locking leg into the mounting hole of the panel which is the counterpart member. The fastener body is a type of fastener that is attached to the panel in a state in which the reinforcement body is integrally provided with the substrate of the fastener body, and the reinforcement portion can be flexed by elasticity with respect to the substrate, And the fastener located in the state which supported the surrounding surface of the seal body from the outside. The fastener according to claim 1, wherein the reinforcing portion is continuously provided in the outer peripheral direction of the seal body, and a distal end portion of the reinforcement portion is wrapped by the seal body.

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