JPH074328Y2 - Two-part fixture - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a two-member fixture, which is used, for example, to attach a lining material to an automobile body.

[Prior Art] Conventionally, as a fixture of this type, a grommet made of a synthetic resin that is attached to an oval-shaped attachment hole formed on the vehicle body side, and a difference that is held by this grommet and overhangs from the lining material. It is known to consist of a metal clip that locks the insert (for example, Japanese Utility Model Laid-Open No. 64-35207).

The grommet includes a flange portion that is larger than the mounting hole on the vehicle body side, a body portion that projects from the lower surface of the flange portion and fits into the mounting hole, and a hollow portion that has an open top surface into which a clip formed in the body portion from the flange portion fits. , A plurality of engaging claws protruding outward from the outer peripheral surface of the main body and facing downward from the lower surface of the flange portion, and protruding inward facing each other from the inner peripheral surface of the main body portion toward the hollow portion A pair of clip locking claws are provided.

The clip has an insertion groove with a U-shaped cross section into which the insertion piece of the lining material can be inserted, and the clip body insertable into the hollow portion of the grommet and the insertion groove inner surface of the clip body face each other. A plurality of first locking claws that inwardly project into the insertion groove and bite into the insertion piece inserted in the insertion groove, and outwardly project from the outer surface of the clip body, and clip locking claws in the hollow portion of the grommet. And a pair of second locking claws elastically engaged with the.

[Problems to be solved by the invention] However, in the above-described conventional fixture, not only a relatively large force is required for inserting and removing the clip with respect to the grommet, but also when the clip is repeatedly inserted and removed, the holding force of the clip by the grommet is increased. Also, there is a problem that the holding force of the insert piece of the lining material due to the clip is likely to decrease.

That is, in the conventional fixture, the clip locking claw of the grommet does not bend and the second locking claw of the clip bends,
Both parties disengage.

In order to make it difficult to remove the clip from the grommet, it is necessary to make a large catch on the clip locking claw of the grommet and the second locking claw of the clip.

However, since the bottom of the hollow part of the grommet is closed, it is necessary to forcibly remove the slider or the like to form the clip locking claw protruding inward in the hollow part. It was difficult to set a large amount of protrusion.

Therefore, it is not possible to significantly catch the clip locking claw of the grommet and the second locking claw of the clip. Therefore, by setting the rigidity of the second locking claw of the clip to be relatively high, It was hard to get out of.

However, this makes it difficult to insert and remove the clip.

Further, if the rigidity of the second locking claw of the clip is made relatively high, the mountain of the resin-made clip locking claw is scraped by the metal second locking claw by repeatedly inserting and removing the clip,
The lining material is crushed and deformed, and the amount of catching between the two is gradually reduced, so that the lining material is likely to be accidentally pulled out, or looseness is likely to occur between the grommet and the clip.

On the other hand, since the claw tip of the second locking claw of the clip is not a surface but a thin linear shape, the claw tip of the second locking claw of the clip bites into the outer surface of the insertion piece of the lining material. Traces tend to remain. For this reason, if the insertion piece of the lining material is repeatedly inserted and removed together with the clip, the claw marks gradually expand and play occurs, and when the insertion piece is forcibly removed, the second locking claw comes off, Clips sometimes remained in the grommet.

Therefore, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to easily insert and remove a clip to and from a grommet, and to hold the clip with the grommet even if the clip is repeatedly inserted and removed. It is intended to provide a mounting tool in which the holding force of the insert piece of the lining material by the clip is not easily lowered.

[Means for Solving the Problems] Therefore, the present invention is to receive a synthetic resin grommet which is attached to an oval mounting hole formed in one member and an insertion piece of the other member which is held inside the grommet. In a two-member fixture comprising a U-shaped clip made of a metal plate to be locked, the U-shaped clip serves as the insertion piece locking means, in addition to the locking claws at the upper ends of the vertical plates on both sides, the central part of the vertical plates on both sides. An inward abutting portion provided on an engaging piece with an inner wall of a grommet formed by punching the engaging piece, the abutting portion extending to the left and right of an engaging position protruding outward of the engaging piece, It is characterized in that it is an inward flat claw plate that protrudes obliquely downward from the left and right protrusions at the upper end.

[Operation] Therefore, according to the present invention, when the clip (C) is inserted into the hollow portion (4) of the grommet (G), the inner side of the engaging portion (19) of the clip and the elastic piece (12) of the grommet. When the locking parts (11) are engaged with each other and the clip is pushed in, the elastic piece bends outward, so that the engaging part rides over the inner locking part and lowers the inner locking part. When it passes, the elastic piece restores, the engaging portion is hooked under the inner locking portion, and the clip cannot be removed from the hollow portion of the grommet.

The insertion piece inserted into the clip is firmly held by the synergistic effect of the conventional locking claw 18 and the newly added contact portion 19c. Similar to the locking claw 18, the contact portion 19c is inclined downward, and the insertion piece is sandwiched between the left and right positions where the engagement piece 19 engages with the locking portion 11 on the inner wall of the grommet, so that the insertion piece may float. Then,
The abutting portion 19c is pressed inward, and is gripped more strongly.

Further, when the insertion piece is pulled out together with the clip, the engagement piece 19 does not bend more than necessary because of the contact portion 19c.

[Embodiment] The present invention will be described below based on an embodiment shown in the drawings.

In the figure, reference numeral 1 denotes a fixture, and in the present embodiment, a plurality of fixtures 1 ... Is used and one member, for example, a metal body B,
The other member, for example, a resin lining material L is attached.

The fitting 1 is a synthetic resin grommet G that is mounted in an oval mounting hole H formed in a vehicle body B, and a plug piece that is held by the grommet G and that extends from the lining material L in a tongue shape. It consists of a metal clip C that locks L '(first
(Figs. 1 and 2).

The grommet G has a body B as shown in FIGS.
Elliptical flange 2 that is slightly larger than the mounting hole H of
And a bottomed cylindrical main body portion 3 protruding from the lower surface of the flange portion 2 and fitted into the mounting hole H, and an upper surface into which the clip C formed in the main body portion 3 from the flange portion 2 is opened, and the cross section is long. A pair of locking pieces that extend obliquely upward from the outer surfaces of the lower ends of both side walls 5, 5 that are opposed to each other in the longitudinal direction of the circular hollow portion 4 and the main body portion 3 and that are spaced downward from the lower surface of the flange portion 2 and face each other.
6,6 and both side walls 7,7 facing each other in the lateral direction of the main body portion 3, respectively, are surrounded by downward facing U-shaped notches 8,8, and the lower end portion is hinged to each side wall 7 by a hinge portion 9. The outer locking portions 10 are connected to each other and project outward from the outer surface of each side wall 7 and face downwardly away from the lower surface of the flange portion 2, and the inner surface of both side walls 7 face each other toward the hollow portion 4. And a pair of elastic pieces 12 having an inward locking portion 11 protruding inwardly are provided, and integrally molded with a resin such as POM having appropriate rigidity and elasticity.

A step portion 6 ′ that engages with the lower edge of the mounting hole H is formed on the outer surface of each tip of the locking piece 6.

The outer locking portion 10 protrudes in a substantially sawtooth shape along the upper edge of the elastic piece 12, and has a step portion 10 ′ that engages with the lower edge of the mounting hole H at the upper end thereof.

The inner locking portion 11 is located in the middle of the height of the elastic piece 12, and the slits 13 are formed on both sides to make it easier to bend. Further, the inner locking portion 11 projects toward the hollow portion 4 in a substantially triangular shape, and the inclined upper surface 11a thereof is gently inclined and the inclined lower surface 11b thereof is steeply inclined so that the clip C can be easily inserted. , Make it hard to come out.

The bottom end of the main body 3 has a plurality of ribs extending vertically and horizontally.
14 are provided, and their outer diameters are tapered. The pair of holes 15 and 15 at the bottom of the main body portion 3 are opened just below the inner locking portion 11 of the elastic piece 12 and can be formed at the time of molding.

As shown in FIGS. 9 to 13, the clip C has a U-shaped cross-section insertion groove 16 into which a tongue-shaped insertion piece L'can be inserted, and can be inserted into the hollow portion 4 of the grommet G. Clip body 17
And a plurality of trapezoidal locking claws 18 that project diagonally downward from the inner surface of the insertion groove 16 of the clip body 17 in an inverted C shape and bite into the insertion piece L'inserted in the insertion groove 16. , And a pair of engagement pieces 19 and 19 which protrude outward from the outer surface of the clip body 17 and engage with the inner locking portion 11 of the elastic piece 12 in the hollow portion 4 of the grommet G.

Since the locking claw 18 has a trapezoidal shape, not only can the strength of the locking claw 18 be improved as compared with the case where the tip of the claw is sharpened in a point or line shape, but also the end face peculiar to the tip end surface is unique. Since it has an area, it is difficult for nail marks to remain on the outer surface of the insertion piece L '.

On the side surfaces of the clip body 17 which face each other with the insertion groove 16 interposed therebetween, there is a punching hole 20 formed by punching out in a substantially square shape, leaving the locking claw 18 and the engaging piece 19, for example, a square shape. After punching a metal plate, it is bent into a U shape.

The locking claws 18 alternately project into the punching hole 20 with the insertion groove 16 sandwiched therebetween, and the tip end thereof is horizontally cut to form a trapezoidal shape.

The engagement piece 19 is formed by punching into the punching hole 20 into a substantially T shape.
By bending the middle of the height outward in a V shape,
The clip body 17 is projected outward from the side surface. The inclined upper surface 19a of the outer surface of the bent portion is steeply inclined corresponding to the inclined lower surface 11b of the inner locking portion 11 of the grommet G described above, and the inclined lower surface 19b is inclined of the inner locking portion 11. Top 1
Incline gently according to 1a.

A pair of abutting portions 19c, 19c protruding in an inverted C shape are formed in the insertion groove 16 at both ends of the T-shape of each engaging piece 19. As shown in FIG. 16, the abutment portion 19c abuts on the outer side surface of the insertion piece L'inserted in the insertion groove 16 and acts together with the upper engagement claw 18. Since the abutting portions 19c are located on the left and right of the engaging position of the locking portion 11 of the inner wall of the grommet and the engaging piece 19 of the clip, either the clip C or the inserting piece L'is removed from the grommet G. If so, the grommet side locking portion 11 pushes the insertion piece L ′ more strongly. That is, the contact portion 19c is a claw plate that sandwiches the protrusions of the grommet side locking portion 11 effectively, and also serves as a support that does not damage the other party and that prevents the clip side engagement piece 19 from being excessively bent. Even if the clip-side engaging piece 19 has little bending, the grommet side can be sufficiently opened outward by the slit by that amount, so that the clip and the inserting piece can be put in and out without any trouble.

In order to attach the lining material L to the vehicle body B using the grommet G and the clip C having the above-described configurations, the grommet G and the clip C are first assembled together.

As shown in FIG. 1, the clip C is inserted from the lower end thereof in alignment with the upper surface of the opening of the hollow portion 4 of the grommet G. When the clip C is inserted, the gently inclined lower surface 19b of the engaging piece 19 engages with the similarly gently inclined upper surface 11a of the inner locking portion 11 of the elastic piece 12 in the hollow part 4 of the grommet G. . When the clip C is pushed in strongly, the engaging piece 19
The elastic piece 12 passes through the elastic piece 12 while being flexed outward, and the apex of the engaging piece 19 crosses the apex of the inward locking portion 11 of the elastic piece 12, and the elastic piece 12 is restored by the elastic restoring force. , The steeply inclined lower surface 11b of the inward locking portion 11 is caught on the similarly steeply inclined upper surface 19a of the engaging piece 19, and the clip C
Does not come out of the hollow portion 4 of the grommet G (first
(Figures 4,15).

Next, the insertion piece L'of the lining material L is inserted in accordance with the opening upper surface of the insertion groove 16 of the clip C held in the hollow portion 4 of the grommet G. When the insertion piece L'is inserted, the engagement claw 18 is engaged in the insertion groove 16, and the engagement claw 18 is pushed right and left by the outer surface of the insertion piece L '. Enter inside. In this way, when the inserting piece L'is inserted, when the pulling force acts on the inserting piece L ', the metal engaging claw 18 bites into the outer side surface of the resin inserting piece L', and the inserting piece L'is inserted. Prevents the piece L'from falling off (16th
Figure).

In this way, when the assembled fitting 1 is attached to the insertion piece L'of the lining material L, the grommet G is inserted from the lower end portion thereof in alignment with the fitting hole H of the vehicle body B.

When the grommet G is inserted, its locking piece 6 and elastic piece 12
The outer locking portion 10 engages with the inner edge of the mounting hole H, passes through the inner edge while being pushed by the inner edge and flexing respectively, and when passing through the inner edge downward, the elastic restoring force restores each elastic restoring force. The step 6 ′ of the stop piece 6 and the step 10 ′ of the outer locking part 10 engage with the lower edge of the mounting hole H, respectively, and the peripheral edge of the mounting hole H is vertically aligned with the lower surface of the flange 2. Hold it. Since the locking piece 6 and the elastic piece 12 of the grommet G have a symmetrical structure with the main body portion 3 and the hollow portion 4 interposed therebetween, they have a centering function of the mounting position of the grommet G with respect to the mounting hole H.

Thus, by mounting the grommet G in the mounting hole H of the vehicle body B, the lining material L is fixed to the vehicle body B via the mounting tool 1.

In the embodiment shown in FIG. 2, since a plurality of insert pieces L'project from the lining material L, the attachment pieces 1 are attached to the respective insert pieces L'and a plurality of them are opened on the vehicle body B. Mounting hole H
Insert and lock.

On the other hand, the lining material L is attached to the vehicle body B for maintenance or the like.
To remove the lining material L from the vehicle body B, the lining material L may be pulled with respect to the vehicle body B.

In this way, when the lining material L is pulled, the clip C is removed from the inside of the hollow portion 4 of the grommet G while being attached to the insertion piece L ', while the grommet G is also attached to the mounting hole H of the vehicle body B.
It remains attached to.

That is, when the lining material L is pulled, the insertion piece L'is prevented from coming off from the insertion groove 16 of the clip C by the locking claw 18, so that the clip C is integrally grommet with the insertion piece L '. Attempt to escape from the G hollow portion 4.

At that time, the steeply inclined upper surface of the engaging piece 19 of the clip C
19a tries to resist the pulling force by catching on the inclined lower surface 11b of the inner locking portion 11 of the grommet G which is also steeply inclined, but if a strong pulling force is applied, even if both contact surfaces are steeply inclined. Since it is inclined, the elastic piece 12 is pushed by the engaging piece 19 and bends outward, and the clip C becomes the hollow portion 4 of the grommet G.
Get out of the inside.

Further, when the clip C comes off, the reaction force of the elastic piece 12 pushes the engagement piece 19 inwardly via the inward locking portion 11.
At this time, since the engaging piece 19 is hardly bent, the clip C is bent from the lower end of the U-shape so that the gap between the insertion grooves 16 is narrowed and the locking claw 18 is inserted. Included piece L '
In addition, it bites even more strongly. Therefore, the holding force of the insertion piece L'becomes high and effectively prevents the insertion piece L'from coming off the insertion groove 16 of the clip C.

To attach the lining material L to the vehicle body B again,
To the remaining grommet G that has been installed in the mounting hole H of
The insertion piece L'may be attached together with the clip C.

In addition, in the embodiment shown in the drawings, the lining material L is used to attach the lining material L to the vehicle body B using the present attachment tool 1, but it is needless to say that it can be used to attach two other members.

[Effects of the Invention] As described above, according to the present invention, it is easy to insert and remove the clip to and from the grommet, and even when the clip is repeatedly inserted and removed, the retaining force of the clip by the grommet and the retaining force of the insertion piece by the clip. Is difficult to decrease,
It is possible to provide a fixture having high durability and high reliability.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is an exploded perspective view showing a fitting, FIG. 2 is an exploded perspective view showing a mounting state, and FIGS. 3 to 8 are grommets. 3 is a front view, FIG. 4 is a plan view, FIG. 5 is a side view, FIG. 6 is a bottom view, FIG. 7 is a sectional view taken along the line VII-VII of FIG. 4, and FIG. Sectional view taken along the line VIII-VIII in the figure, FIGS. 9 to 13 show clips, FIG. 9 is a front view, FIG. 10 is a plan view, FIG. 11 is a side view, and FIG. 12 is a bottom view. , FIG. 13 is a sectional view taken along line XIII-XIII in FIG. 9, FIGS. 14 and 15 show the fixture in an assembled state, FIG. 14 is a lateral sectional view, FIG. 15 is a longitudinal sectional view, FIG. 16 is a vertical sectional view showing a mounted state. DESCRIPTION OF SYMBOLS 1 ... Fixing tool, G ... Grommet, C ... Clip, B ... Car body, H ... The mounting hole, L ... Lining material, L '... The insertion piece, 2 ... Grommet flange part, 3 ... Main body part, 4 ...
Hollow part, 6 ... Locking piece, 7 ... Side wall, 8 ... Notch, 9 ... Hinge part, 10 ... Outer locking part, 11 ... Inner locking part, 12 ... Elastic piece,
16 ... clip insertion groove, 17 ... clip body, 18 ... locking claw, 19 ... engaging piece.

Claims (1)

[Scope of utility model registration request] 1. A synthetic resin grommet which is mounted in an oval mounting hole formed in one member, and a U-shaped clip made of a metal plate which is held inside the grommet and receives and locks an inserting piece of the other member. In the two-member mounting tool, the U-shaped clip serves as the inserting piece locking means, in addition to the locking claws at the upper ends of the vertical plates on both sides, and the inner wall of the grommet formed by punching out the central portion of the vertical plates on both sides. Of the engaging piece attached to the engaging piece, and the abutting portion extends to the left and right of the engaging position projecting outward of the engaging piece, and obliquely downward from the left and right projecting parts of the upper end of the engaging piece. A two-member fixture characterized in that it is an inwardly projecting flat claw plate.