JP4423266B2 - Grommet - Google Patents

Description

  The present invention relates to a grommet for fastening two or more members each having a grommet hole by insertion into the grommet hole and a subsequent fastening operation in a state where the members are overlapped so that the grommet holes communicate with each other. Regarding improvements.

  It is composed of a female member having a cylindrical portion made of an elastic piece divided by a slit, and a male member having a shaft portion and a flange and expanding the elastic piece by inserting the shaft portion into the cylindrical portion of the female member. There is a clip (grommet) shown in Patent Document 1 or the like. The elastic piece of the female member has a protrusion, and the shaft portion of the male member has an engagement recess, and the expanded state is maintained by the engagement between the protrusion and the engagement recess. After inserting the cylindrical portion of the female member into the hole formed in the two panels, the two panels are joined together by creating the expanded state.

However, when it is necessary to re-set the member such as the panel once fastened by this kind of clip (grommet), the shaft portion of the male member is extracted from the female member and the expanded state. However, in the case of Patent Document 1, the tip of a tool such as a driver is pushed under the armpit and the male member is pulled out so as to release the engagement.
JP-A-10-331818

  The main problem to be solved by the present invention is that this type of grommet is provided with a structure that can easily unfasten the members of the grommet without using a tool or the like.

In order to achieve the above object, in the present invention, the grommet has the following configurations (1) to (3).
(1) This body part is composed of a female part having a base and a body part and a male part having a head part and a shaft part, and this body part is inserted after the body part of the female part is inserted into a grommet hole that is communicated with each other. The male part is pushed to the reference position, and the female part is elastically deformed outward by engaging with the body side at the reference position, so that at least the female member having the grommet hole is prevented from being separated from each other. A grommet with parts made of synthetic resin,
(2) The body part of the female part is divided into two or more body component pieces by a slit extending from the tip to the root,
(3) At least one of these barrel constituent pieces has an extension operation portion at the tip side, and the tip of the barrel constituent piece provided with the extension operation portion is ahead of the tip of the barrel constituent piece not provided with this extension operation portion. Located in the
(4) The shaft portion of the male part is provided with a tip side engaging recess and a base side engaging recess deeper than the tip side engaging recess,
On the inner side of the body component piece of the female part, there is a hooking convex part with a protruding dimension that does not fit in the tip side hooking concave part but enters the base side hooking concave part,
When the male part is pushed into the reference position, the hooking convex part enters the tip side hooking concave part, and when the male part is pushed into the maximum pushing position before the reference position, the hooking convexity is hooked into the base side hooking concave part. The part comes in,
(5) Moreover, when the male part is pushed into the maximum pushing position, a gap is formed between the inner surface of the extension operation part and the outer surface of the shaft part of the male part.

  According to such a configuration, first, after inserting the body part of the female part into the grommet hole of the two or more members in communication with each other, the male part is inserted into the body part to the reference position. By pushing the shaft portion, the body part of the female part, that is, the body component piece is elastically deformed outward, and two or more members can be fastened together so as not to be separated from each other. Secondly, in such a state that two or more members are held together so as not to be separated from each other, the body component piece provided with the extension operation part is further opened outward by gripping the extension operation part. All the barrel component pieces and shafts can be elastically deformed by pressing them in the direction to push out the shaft portion of the male part from the barrel portion while releasing the engagement between the barrel component piece and the shaft portion provided with the extended operation portion. The state where the female part is fastened to the grommet hole can be easily released without using a tool or the like by releasing the engagement with the part and elastically restoring the body component piece.

Also, in this case, by pushing the shaft of the male part at the reference position to the maximum pushing position using its head, the body component piece of the female part that begins to deflect outward at the reference position It can be elastically restored to release the fastening of the body part of the female part to the grommet hole. As a result, the grommet can be removed from the grommet hole. Then, the trunk component piece provided with the extension operation portion is elastically deformed in a direction to be further opened outward by gripping the extension operation portion and the like, and the engaging convex portion and the shaft portion of the barrel configuration piece provided with the extension operation portion By engaging in a pressing operation, etc. in a direction to push the male part shaft part out of the body part while unlatching with the base side engaging recessed part of the body part, the engaging convex parts of all body component pieces become the front side engaging recessed parts of the male part shaft part. In addition, it is possible to easily create a state in which the body component piece of the female part is elastically restored without being engaged with the base side engaging recess. Thereby, it becomes possible to reuse the grommet. Further, when the male part is pushed into the maximum pushing position, a gap is formed between the inner surface of the extension operation part and the outer surface of the shaft part of the male part, so that the extension operation part is Easy to operate in a direction away from the shaft due to the gap.

  When the male part is pushed into the reference position, the male part's head protrudes from the base when the male part's shaft hole that is in communication with the space in the trunk formed at the base of the female part is inserted. It may be formed at the bottom of a dent with a depth that is not allowed.

  In this case, since the head of the male part does not protrude from the recess of the base of the female part when the shaft of the male part is pushed to the reference position, the head of the male part unexpectedly in this state Is pushed so that the shaft portion is pushed to the maximum pushing position and the fastening to the grommet hole is not released.

  According to the grommet of the present invention, the state in which the members are fastened together by the grommet can be easily solved without using a tool by using the extension operation portion of the body component piece provided with the extension operation portion of the female part. Therefore, it can also be reused without problems.

  The best mode for carrying out the present invention will be described below with reference to FIGS.

  1 to 8 respectively show the grommets according to the embodiment. In such grommets, the retaining small projections 21d of the male part 2 are formed at the hole edges of the insertion holes 10c of the female part 1. The shaft part 21 of the male part 2 is prevented from completely coming out of the body part 11 of the female part 1 because it has entered the slit 11g by getting over the passing part 10g ahead of the formed guide recess 10f. . 9 to 14 show such a male part 2, and FIGS. 15 to 22 show such a female part 1, respectively.

  FIG. 23 and FIG. 24 show the body configuration of the female part 1 by inserting the shaft part 21 of the male part 2 to the reference position into the female part 1 after inserting the body part 11 of the female part 1 into the grommet hole Pa. FIG. 25 and FIG. 26 show that the shaft portion 21 of the male part 2 is pushed in from the state of FIG. 23 and FIG. 24 to the maximum pushing position. FIG. 9 shows the released state of the fastening of the member P in which the engaging convex portion 11c of the female part 1 is accommodated in the base side engaging concave portion 21b of the male part 2 and all the body constituting pieces 11b are elastically restored.

  The grommet according to this embodiment is inserted into the grommet hole Pa in a state in which two or more members P having the grommet hole Pa are overlapped so that the grommet hole Pa communicates, and thereafter It is used for fastening through the grommet by the fastening operation.

  Such a grommet is typically used for applications such as fastening two panels P ′ each having a grommet hole Pa as in the illustrated example.

  The grommet is made of a synthetic resin and includes a female part 1 and a male part 2. The male part 2 may be made of a material that is not easily elastically deformed, such as metal.

  The female part 1 includes a base portion 10 and a trunk portion 11. On the other hand, the male part 2 includes a head 20 and a shaft 21. The grommet is inserted into the body part 11 after the body part 11 of the female part 1 is inserted into the grommet hole Pa communicated together, and the shaft part 21 of the male part 2 is pushed to the reference position into the body part 11 at the reference position. By engaging on the side, the body 11 of the female part 1 is elastically deformed outward to prevent the members P having the grommet holes Pa from being separated from each other. (FIGS. 23 and 24)

  In the illustrated example, the base 10 of the female part 1 is configured to have a disk shape. The base 10 of the female part 1 is sized so as not to enter the grommet hole Pa. The surface of the base portion 10 on the protruding side of the body portion 11 (hereinafter referred to as the back surface 10a of the base portion 10) is a surface that is perpendicular to the central axis of the body portion 11, and is female to the grommet hole Pa. The body 11 of the part 1 can be inserted to a position where the back surface 10a is brought into contact with the outer surface of the member P on the front side of the insertion. An insertion hole 10c of the shaft portion 21 of the male part 2 is provided in a through state substantially at the center of the base portion 10. The insertion hole 10 c communicates with a space 11 a in the body portion 11 of the female part 1. The hole of the insertion hole 10c is formed in the bottom 10e of the recess 10d having a substantially circular inner shape. The recess 10 d has a size that can accommodate the head 20 of the male part 2 and a depth larger than the thickness of the head 20. In this embodiment, when the male part 2 is pushed into the reference position, the head 20 of the male part 2 is positioned at substantially the same level as the surface 10b of the base 10 and protrudes from the recess 10d. It is supposed not to let you. As will be described later, the male part 2 in which the engaging protrusion 11c is engaged with the engaging recess 21a of the front end portion of the body 11 of the female part 1 at the reference position is further pushed from the reference position to the maximum pushing position (see FIGS. 25 and 26). However, when this is done, the hooking projection 11c enters the base-side hooking recess 21b, so that the body 11 of the female part 1 is elastically restored and fastened to the grommet hole Pa. Will be solved. However, in the grommet according to this embodiment, the head part 20 of the male part 2 protrudes from the recess 10d of the base part 10 of the female part 1 in a state where the shaft part 21 of the male part 2 is pushed to the reference position. Therefore, in this state, the head 20 of the male part 2 is unexpectedly pushed and the shaft portion 21 is pushed to the maximum pushing position so that the fastening to the grommet hole Pa is not released.

  On the other hand, the body part 11 of the female part 1 is divided into two or more body component pieces 11b by a slit 11g extending from the tip to the root. In the illustrated example, the body portion 11 is a cylindrical body having both ends of the cylinder open, and one end of the cylinder is formed into a disk shape, and the in-cylinder space is formed in the insertion hole 10c with respect to the back surface 10a. The slit 11g is formed from the other end (tip) of the cylindrical body that is integrally connected so as to communicate with the other end (root) of the cylinder. The slits 11g are provided at four positions with substantially equal intervals between the slits 11g adjacent to each other in the circumferential direction of the cylindrical body, whereby the body part 11 of the female part 1 is formed on the four body component pieces 11b. It is divided.

  A hooking convex portion 11c is formed on the distal end side of each barrel constituting piece 11b. At the formation position of the engaging projection 11 c, the inner diameter of the space 11 a in the trunk portion 11 is smaller than the maximum diameter of the shaft portion 21 of the male part 2. The inner diameter of the space 11a in the body portion 11 from the position where the hooking convex portion 11c is formed to the insertion hole 10c is configured to be substantially equal to the maximum diameter of the shaft portion 21 of the male part 2. The hooking convex portion 11c protrudes inwardly from the top of the chevron base 11d, and the chevron base 11d having both the side directed toward the base side of the body 11 and the side directed toward the distal end as an inclined surface 11e. A top protrusion 11f.

  In this embodiment, one of the four barrel constituent pieces 11b has the distal end side as an extension operation portion 11h, and the distal end (end) of the barrel constituent piece 11b provided with the extension manipulation portion 11h. ) Is positioned ahead of the tip (end) of the body constituting piece 11b without this. In the example shown in the figure, the extension operation portion 11h is formed at the tip of the hooking projection portion 11c in the one body constituting piece 11b.

  The outer surface of the extended operation portion 11h is located on the same surface as the outer surface of the body constituting piece 11b, but the inner surface is located on the outer side of the engaging convex portion 11c. Thereby, when the male part 2 is pushed into the maximum pushing position, the hooking convex part 11c of the body component piece 11b of the female part 1 is inserted into the base side hooking concave part 21b of the shaft part 21 of the male part 2 at the maximum pushing position. A gap s is formed between the inner surface of the extended operation portion 11 h and the outer surface of the shaft portion 21 of the male part 2 in the fully inserted state.

  As a result, in the grommet according to this embodiment, first, the body part 11 of the female part 1 is inserted into the grommet hole Pa of two or more members P in communication with the grommet hole Pa. After that, by pushing the shaft portion 21 of the male part 2 into the barrel portion 11 to the reference position, the barrel portion 11 of the female part 1, that is, the barrel component piece 11b is elastically deformed to the outside, and this barrel component piece Two or more members P can be fastened together so as not to separate between 11b and the base 10. Secondly, from the state where two or more members P are held together so as not to be separated from each other, the body constituting piece 11b including the extension operation portion 11h is further moved outward by gripping the extension operation portion 11h. Pushing the shaft part 21 of the male part 2 in the direction of pushing out the shaft part 21 from the inside of the body part 11 while releasing the engagement between the shaft part 21 and the body component piece 11b provided with the extended operation part 11h by elastic deformation in the opening direction. By doing so, the engagement between all the barrel component pieces 11b and the shaft portion 21 is released, and the barrel component piece 11b is elastically restored, so that the female part 1 can be easily inserted into the grommet hole Pa without using a tool or the like. The fastened state can be released. The extension operation part 11h can be easily operated in a direction away from the shaft part 21 by the gap s.

In the illustrated example, the shaft 21 of the male part 2 is further provided with a front end side engaging recess 21a and a base side engaging recess 21b deeper than the front end side engaging recess 21a.
On the inner side of the body component piece 11b of the female part 1, there is provided a hooking convex portion 11c having a protruding dimension that does not fully enter the tip side hooking concave portion 21a but can enter the base side hooking concave portion 21b.
When the male part 2 is pushed into the reference position, the hooking convex part 11c enters the tip side hooking concave part 21a (FIG. 24), and when the male part 2 is pushed into the maximum pushing position before the reference position. The engaging protrusion 11c enters the base side engaging recess 21b. (Fig. 26)

  Accordingly, in the illustrated example, the shaft portion 21 of the male part 2 at the reference position is further pushed to the maximum pushing position by using the head portion 20, so that the female that begins to bend outward at the reference position. The body constituting piece 11b of the part 1 can be elastically returned to release the fastening of the body part 11 of the female part 1 to the grommet hole Pa. As a result, the grommet can be removed from the grommet hole Pa. Next, the body constituting piece 11b provided with the extending operation portion 11h is elastically deformed in such a direction that the body constituting piece 11b provided with the extending operation portion 11h is further opened outward by gripping the extending operation portion 11h. Engagement of all the body component pieces 11b is performed by pressing the shaft part 21 of the male part 2 in the direction of pushing out from the body part 11 while releasing the engagement between the convex part 11c and the base side engaging recess part 21b of the shaft part 21. It is possible to easily create a state in which the convex portion 11c does not engage with the front end side engaging concave portion 21a and the base side engaging concave portion 21b of the shaft portion 21 of the male part 2, and thus the body constituting piece 11b of the female part 1 is elastically restored. . Thereby, it becomes possible to reuse the grommet. In the illustrated example, the shaft portion 21 protrudes from the tip of the body portion 11 at the maximum push-in position, and there is only one body component piece 11b provided with the extension operation portion 11h, so that it is removed from the grommet hole Pa. When the protruding portion of the shaft portion 21 of the grommet is pressed from the side toward the body constituting piece 11b provided with the extending operation portion 11h, the body constituting piece 11b provided with the extending operation portion 11h is first elastically deformed outward. Further, the engagement between the engaging projection 11c of the remaining three barrel constituting pieces 11b and the base-side engaging recess 21b of the shaft portion 21 can be released and the shaft portion 21 can be easily pushed back to a reusable position. It has become.

  In the illustrated example, the head 20 of the male part 2 is configured to have a disk shape. The head 20 has a size that does not enter the insertion hole 10 c of the female part 1.

The shaft part 21 of the male part 2 is configured so as to be provided with the following parts with respect to a round bar-like body whose tip is constricted.
(1) Base side engaging recess 21b at a position approximately in the middle of the length direction
(2) The distal end side engaging recess 21a on the distal end side adjacent to the base side engaging recess 21b.
(3) A small protrusion 21d that prevents the tip side hook recess 21a from coming off the tip side.
(4) A base-side small protrusion 21e in the vicinity of the head 20

  The base-side engaging recess 21b has an in-recess inner shape that follows the contour shape of the engaging protrusion 11c of the body constituting piece 11b. Accordingly, the base side engaging recesses 21b are provided at four positions with substantially equal intervals between the base side engaging recesses 21b adjacent in the circumferential direction of the shaft portion 21. The base-side engaging recess 21b has both the tip-side recess wall surface 21c and the base 10-side recess wall surface 21c inclined, and is maximum pushed in from the reference position together with the inclined surface 11e of the mountain-shaped base 11d of the hooking projection 11c. When the shaft portion 21 is pushed toward the position, the hooking convex portion 11c enters the base-side hooking concave portion 21b, and the base portion when the shaft portion 21 is pushed out from the body portion 11 from the maximum pushing position as described above. The latching projection 11c is smoothly pulled out from the side latching recess 21b.

  The front end side engaging recess 21 a is formed only at a location adjacent to the two base side engaging recesses 21 b located at opposite positions across the center of the shaft portion 21. In the illustrated example, the tip side engaging recess 21a is a shallow rectangular recess that is long in the circumferential direction of the shaft portion 21 and into which only the top protrusion 11f of the engaging protrusion 11c is inserted.

  Each of the retaining small projections 21d and the base side small projections 21e is provided on an imaginary straight line x along the length direction of the shaft portion 21 passing between the adjacent base side engaging recesses 21b. ing. The retaining small projections 21d are provided on both sides in the diameter direction of the shaft portion 21, and the base side small projections 21e are provided on each of the virtual straight lines x conceived at four places. (Fig. 9)

  Four guide recesses 10f are formed in the hole edge portion of the insertion hole 10c of the base 10 of the female part 1 with substantially equal intervals between the guide recesses 10f adjacent in the circumferential direction. The bottom surface of the guide recess 10f is inclined so as to gradually protrude toward the center side of the base portion 10 from the front surface 10b side of the base portion 10 toward the back surface side. The guide recess 10f ends with leaving the climbing part 10g between the end of the slit 11g.

  In this embodiment, the shaft part 21 of the male part 2 can be inserted into the body part 11 of the female part 1 through the insertion hole 10c only in the direction in which the retaining protrusion 21d is inserted into the guide recess 10f. It has become. By the insertion operation, the retaining small projection 21d is elastically deformed and climbs over the climbing portion 10g and enters the slit 11g. In the insertion position where the tip of the shaft portion 21 of the male part 2 is in contact with the inclined surface 11e on the base 10 side of the engaging projection 11c of the body constituting piece 11b, the shaft portion 21 does not cause the body constituting piece 11b to bend outward. Is not engaged with the shaft portion 21 of the male part 2, but the retaining small projection 21 d is caught by the end of the slit 11 g, so that the shaft portion 21 of the male part 2 does not have to be pushed to the reference position. Does not completely escape from the body 11 of the female part 1. (FIG. 7) When the shaft part 21 of the male part 2 is fully pushed from the reference position to the fully pushed-in position, the base side small protrusion 21e is elastically deformed, gets over the ride over part 10g and enters the slit 11g.

Grommet front view Rear view Same left side view Same side view Plan view Bottom view AA line sectional view in FIG. BB sectional view in FIG. Front view of male part 2 Same side view Plan view Bottom view CC sectional view in FIG. DD line sectional view in FIG. Front view of female part 1 Rear view Same left side view Same side view Plan view Bottom view EE sectional view in FIG. FF sectional view taken on the line in FIG. The side view which showed the fastening state of the members P and P GG sectional view in FIG. The side view which showed the cancellation | release state of the fastening of the members P and P HH line sectional view in FIG.

Explanation of symbols

P member Pa Grommet hole 1 Female part 10 Base part 11 Body part 11b Body part 11g Slit 11h Extension operation part 2 Male part 20 Head part 21 Shaft part

Claims (2)

It consists of a female part with a base and a torso and a male part with a head and a shaft, and the male part is inserted into this torso after inserting the torso of the female part into the grommet holes The shaft part of the female part is pushed to the reference position, and at this reference position, the female part body part is elastically deformed outward by engaging with the body part side, and at least the female part having the grommet hole is prevented from being separated from each other. A grommet made of resin,
The body part of the female part is divided into two or more body constituent pieces by a slit extending from the tip to the root,
At least one of these barrel constituent pieces has an extension operation portion at its distal end side, and the distal end of the barrel constituent piece provided with the extension operation portion is positioned before the tip of the barrel constituent piece not provided with this extension operation portion. and,
The shaft part of the male part is provided with a tip side engaging recess and a base side engaging recess deeper than the tip side engaging recess,
On the inner side of the body component piece of the female part, there is a hooking convex part with a protruding dimension that does not fit in the tip side hooking concave part but enters the base side hooking concave part,
When the male part is pushed into the reference position, the hooking convex part enters the tip side hooking concave part, and when the male part is pushed into the maximum pushing position before the reference position, the hooking convexity is hooked into the base side hooking concave part. The part comes in,
Moreover, the grommet is characterized in that a gap is formed between the inner surface of the extension operation portion and the outer surface of the shaft portion of the male part when the male part is pushed into the maximum pushing position .   The hole of the insertion hole in the shaft of the male part that communicates with the space in the body formed at the base of the female part does not protrude the head of the male part from the base when the male part is pushed into the reference position. The grommet according to claim 1, wherein the grommet is formed at the bottom of a recess having a depth.

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