JPH0137207Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of Application of the Invention The present invention relates to a plastic fastener, for example a fastener for fixing a radiator grill of an automobile to a radiator panel.

<Prior art> (Fig. 8) Conventionally, in order to install the radiator grill 1 of an automobile, as shown in Fig. 8, the radiator grill 1 is
The engagement protrusion 2 provided at the bottom of the lower skirt 3
hole 4 of the radiator grille 1 through the cover 5, align the hole 7 of the mounting piece 6 provided on the upper part of the radiator grille 1 with the mounting hole 9 of the upper radiator panel 8, and insert plastic into both holes 7 and 9. The screw grommet 1 is inserted by inserting the fastener 12 consisting of the screw grommet 10 and the tapping screw 11 made of
0 base part 10b is located in both holes 7 and 9, and the tapping screw 11 is inserted into the screw grommet 10.
The screw grommet 10 is rotated inward and screwed in, and the lower expanded portion 10c of the base portion 10b that is connected to the flange portion 10a of the screw grommet 10 is expanded to create a gap between the flange portion 10a and the expanded portion 10c of the screw grommet 10. The mounting pieces 6 of the radiator panel 8 and the radiator grille 1 are sandwiched between the radiator panel 8 and the radiator grille 1, thereby fixing the radiator panel 8 and the radiator grille 1 in place.

<Problems to be Solved by the Present Invention> However, in this method, in order to screw in the tapping screw 11, it is necessary to use a screwdriver or an automatic screw-in tool, making the fixing work complicated. In addition, if it is necessary to remove the radiator grill 1 for inspection etc.,
The task of pulling out the tapping screw 11 by rotating the screwdriver in the opposite direction using an automatic tool is complicated, and since the threaded surfaces formed on the screw grommet 10 and the tapping screw 11 are made of plastic, these It was destroyed during work and could not be reused. Furthermore, although the base 10b of the screw grommet 10 is located in the holes 7 and 9, there is some gap in the horizontal direction between the holes 7 and 9 and the base 10b.
Vibration during driving of the vehicle caused the radiator grille 1 to wobble in the direction of the mounting surface.

<Purpose of the present invention> The present invention aims to correct the above-mentioned drawbacks and provide a fastener that is easy to fix, easy to remove, can be reused, and prevents wobbling in the direction of the mounting surface. The purpose is

<Embodiment of the present invention> (Figs. 1 to 7) Hereinafter, an embodiment of the present invention will be described based on the drawings.

1 to 3 show an embodiment of the present invention.

In the figure, 20 is an outer cylindrical body integrally molded from plastic.

The cylindrical portion 21 of the outer cylindrical body 20 has an outer shape slightly smaller than the hole 7 of the radiator grille 1 and the mounting hole 9 of the radiator panel 8, and has a substantially rectangular hollow portion 22 with a substantially rectangular cross section and is open at both ends. It has a hollow cylindrical shape, and a flange portion 23 is provided at one end thereof to protrude in a direction perpendicular to the cylindrical portion 21 .

The flange portion 23 and the upper half of the cylinder portion 21 are
The opposing side walls 21 of the cylindrical portion 21 are divided into two parts.
Slits 24a and 24b are provided on both sides of the flange portion 23 from approximately the center of the flange portions 21a and 21b, so that the flange portion 23 and the upper half of the cylindrical portion 21 can be expanded in a direction perpendicular to the axial direction. ing.

Further, opposing both side walls 21c, 21 of the cylindrical portion 21
U-shaped notches 25a and 25b that open downward are provided in the lower half of d. The side walls 21c and 21d have cutouts 25a and 25b.
As shown in FIG. 2, clamping portions 26a and 26b projecting inward are provided at the lower end of the holder. The inner parts between the opposing clamping parts 26a and 26b are connected by a connecting part 27 that projects inward from the side walls 21a and 21b as shown in FIG. 3a.

Locking pieces 29a and 29b are provided in the upper halves of the opposing side walls 21c and 21d by substantially U-shaped slits 28a and 28b. Locking piece 29
The upper outer surfaces of a and 29b are provided with protrusions 30a and 30b that protrude outward. This protrusion 30
The lower side of a and 30b is a tapered part 31 with a gentle slope.
a, 31b, the upper side has a large slope and the tapered part 32
a, 32b.

Reference numeral 40 denotes an insert body integrally formed of plastic that is inserted into the hollow portion 22 of the outer cylinder body 20 from the flange portion 23 side.

The insert 40 is composed of a long plate-shaped rod 50 and a head 60 provided at one end of the rod.

The rod 50 has a long plate shape, and has a thickness (side wall 50
c, 50d) is set to a thickness slightly smaller than the distance between the holding parts 26a, 26b at the lower end of the side walls 21c, 21d of the cylinder part 21, as shown in FIG. , 50b) of the side walls 21a, 2 of the cylindrical portion 21 as shown in FIG. 3a.
The width is set to be slightly smaller than the distance between the connecting parts 27, 27 at the lower end of 1b.

Further, retainers 51a and 51b are provided to protrude from one end of the side walls 50a and 50b. In addition, arc-shaped click stops 52a, 52b, 53a, 53b, 5
4a and 54b are provided in a protruding manner.

A head 60 is provided at the other end of the rod 50.

The head 60 has a substantially rectangular shape, and the thickness (distance between the side walls 60c and 60d) is greater than the distance between the inner walls at the upper end of the side walls 21c and 21d of the cylindrical portion 21, as shown in FIG. 3b. It is set slightly larger and the width (side wall 60
As shown in FIG. 3a, the distance between the inner walls of the upper end portions of the side walls 21a and 21b of the cylindrical portion 21 is set to be slightly smaller than the distance between the inner walls. In the lower portions of the side walls 60c and 60d, tapered portions 61a and 61b and tapered portions 62a and 62b are provided in two stages, as shown in FIG. 3b.

<Operation of the above embodiment> First, from the state shown in FIG.
2, the rod 50 of the insert body 40 is inserted from the flange portion 23 side. At this time, the retainers 51a, 51
b protrudes from both sides of the rod 50, so the lower tapered portions 51a', 5 of the retainers 51a, 51b
1b' is the connecting portion 27 at the lower end of the side walls 21a, 21b,
27, but when pushed strongly, the lower half of the cylindrical portion 21 is divided into two parts by the notches 25a and 25b, so it is elastically deformed and opens left and right, and the retainers 51a and 51b penetrates outward from the lower end of the cylindrical portion 21.

For this reason, as shown in FIGS. 3a and 3b, the rod 50
The lower ends of the side walls 50c, 50d are the side walls 21c, 2
1d is held between the holding parts 26a, 26b at the lower end, and the connecting parts 27, 27 are the retainers 51a,
51b and the click stops 54a, 54b, and the head 6 of the insert body 40
The lower ends of the side walls 60a, 60b of 0 are the side walls 21a, 2
It is in a state where it is fitted into the upper inner wall of 1b.

In this way, with the insert body 40 inserted and connected to the outer cylinder body 20, the outer cylinder body is inserted into the mounting hole 9 of the radiator panel 8 and the hole 7 of the radiator grille 1, which are matched as shown in FIG. Insert from the bottom end of 20. At this time, the protrusions 30a, 30 protruding outward
The tapered portions 31a and 31b of b come into contact with the edge of the mounting hole 7, but when the outer cylinder 20 is pushed in strongly, the upper ends of the locking pieces 29a and 29b are elastically deformed inward as shown in FIG. and pass through holes 9 and 7. When the outer cylindrical body 20 is pushed in until the flange 23 comes into contact with the radiator grille 1, the locking pieces 29a and 29b elastically return to their original positions, as shown in FIG. 3b.
The radiator grille 1 and the radiator panel 8 are connected to the flange portion 23 and the protruding portions 3 of the locking pieces 29a and 29b.
0a and 30b.

Next, from the state shown in FIG. 3, when the head 60 of the inserter 40 is pushed in until it is approximately at the same height as the flange portion 23, the click stops 54a, 54b and 53a and 53b come into contact with the connecting parts 27 and 27, push open the lower half of the cylindrical part 21, and pass through, and the side walls 60c and 60d of the head 60 fit into the upper end of the hollow part 22. For this reason, the cuts 24a, 24b
The flange part 23 and the cylinder part 2 are divided into two by
1 is pushed open, and the outer surfaces of the side walls 21c and 21d of the cylindrical part 21 are strongly pressed against the inner walls of the hole 7 and the mounting hole 9, and the connecting parts 27 and 2 are in close contact with each other.
7 is in a state where the click stops 52a, 52b are fitted between the click stops 53a, 53b.

In this state, the locking pieces 29a of the cylindrical portion 21,
Side walls 60c, 60 of the head 60 are attached to the inner wall of the head 60.
d are in contact with each other, even if an attempt is made to remove the outer cylinder 20 from the hole 7 or the mounting hole 9, the locking pieces 29a and 29b
cannot be deformed inward. In this way, the outer cylinder body 2
0 cannot be removed from the hole 7 and the mounting hole 9, and the radiator grill 1 and the radiator panel 8 are attached to the outer cylinder body 20.
is held between the flange portion 23 and the protruding portions 30a, 30b of the locking pieces 29a, 29b. In addition, since the head 60 fits in and pushes open the upper half of the outer cylinder body 20 by the side walls 60c and 60d, the upper part of the side walls 21c and 21d of the cylinder part 21 is attached to the edge of the hole 7 and the mounting hole 9. is strongly pressed, no wobbling occurs in the direction of the mounting surface of the outer cylinder 20 (in the direction parallel to the radiator grille 1).

To remove the radiator grille 1 from the radiator panel 8, use a screwdriver or the like to further push the head 60 of the insert 40 down to the bottom of the hollow portion 22, as shown in FIGS. 6a and 6b. Then, the click stops 52a, 52b are connected to the connecting portions 27, 27.
The tapered portions 62a, 62b at the lower ends of the side walls 60c, 60d of the head 60
It comes into contact with the tapered portions 26a' and 26b' of 6b and stops.

In this state, the head 60 is attached to the locking pieces 29a, 29
It has reached the lower part of b. Further, the upper half of the cylindrical portion 21 elastically returns to a state where it is separated from the edges of the hole 7 and the attachment hole 9.

Therefore, when the flange portion 23 is pried up with a screwdriver or the like, the protruding portions 30a, 30 of the locking pieces 29a, 29b are attached to the edges of the mounting hole 9, as shown in FIG.
The upper tapered portions 32a and 32b of b contact each other, and the locking pieces 29a and 29b are elastically deformed inward, and the outer cylinder 20 comes out of the hole 7 and the attachment hole 9.

After pulling it out in this way, push up the rod 50 that has passed through the lower end of the cylindrical part 21 and
It can be reused by returning it to its original state.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and it goes without saying that various modifications can be made in the configuration of each part. Instead, the head 60 may be circular, or the head 60 may be cylindrical.

<Effects of the present invention> As described above, since the fastener of the present invention is constructed, (a) there is no need to screw in unlike the conventional tapping screw, and it is only necessary to push the insert 40. This greatly simplifies the fixing work.

(b) Also, when removing it, it is only necessary to push in the insert body 40, so the work is easy and it can be reused.

(c) When the insert body 40 is pushed in, the flange portion 23 and the upper half of the outer cylinder body 20 expand in the direction perpendicular to the axial direction and come into strong contact with the inner diameters of the holes 7 and 9, so that the conventional installation is not possible. No wobbling in the surface direction. Therefore, when used for attaching a radiator grill to a radiator panel of an automobile that vibrates violently, it is extremely effective because no rattling occurs.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a fastener according to an embodiment of the present invention before connection, Fig. 2 is a perspective view of the outer cylinder in Fig. 1 cut away, and Fig. 3a is the outer cylinder. Cross-sectional view showing a state in which the insert body is inserted and connected to the body, Figure b
is a sectional view taken along line B-B in Figure a, Figure 4 is a sectional view showing the state in which the fastener is being inserted into the hole, Figures 5a and 6a are sectional views showing the state of use, and Figure 5 b and Fig. 6b are Fig. 5a and Fig. 6a, respectively.
FIG. 7 is a sectional view showing a state in the middle of removing the fastener. FIG. 8 is a sectional view showing a conventional mounting state of the radiator grill. 1...Radiator grill, 6...Mounting piece, 7...
...hole, 8...radiator panel, 9...mounting hole,
20...Outer cylindrical body, 21...Cylinder part, 21a, 21
b, 21c, 21d...side wall, 22...hollow part,
23...Flange portion, 24a, 24b...Cut, 25a, 25b...Notch, 26a, 26b
...Holding part, 27...Connecting part, 28a, 28b...
...Slit, 29a, 29b...Locking piece, 30
a, 30b... protrusion, 40... insert, 50...
... Rod body, 50a, 50b, 50c, 50d ... Side wall, 51a, 51b ... Stopper, 51a', 51
b'...Tapered portion, 52a, 52b...Click stopper, 53a, 53b...Click stopper, 54a, 54b...Click stopper, 60
...Head, 60a, 60b, 60c, 60d...
Side wall, 61a, 61b...Tapered portion, 62a,
62b...Tapered part.

Claims (1)

[Claims for Utility Model Registration] A flange portion 23 protruding in a direction perpendicular to the axial direction is provided at one end of a cylindrical portion 21 that is open at both ends in the axial direction, and an opening is formed at the flange portion 23 from an intermediate portion of the cylindrical portion 21. Slits 24a and 24b are provided on both sides to allow the upper half of the cylindrical portion 21 and the flange portion 23 to expand in a direction perpendicular to the axial direction, and a slit is provided in the middle of the cylindrical portion 21. 28a, 28b
An outer cylindrical body 20 that is formed to be inwardly deformable and provided with locking pieces 29a and 29b having outwardly protruding protrusions 30a and 30b on its outer wall: a hollow portion 22 of the outer cylindrical body 20; The insert body 40 is provided with a head 60 having an outer diameter larger than the inner diameter of the hollow part 22 of the flange part 23 of the outer cylinder body 20 at one end in the axial direction of a rod body 50 inserted into the insert body 40. The rod body 50 of the body 40 is attached to the outer cylinder body 20.
The insert body 4 is inserted into the hollow part 22 of the cylindrical part 21 of the insert body 4.
The head 60 of 0 is the locking piece 29a of the outer cylindrical body 20,
When pushed in until reaching 29b, the head 60 makes the locking pieces 29a, 29b unable to deform inwardly, and the head 60 of the insert 40 is fitted into the hollow part 22 of the cylindrical part 21. The slits 24a and 24b allow the flange portion 23 of the outer cylinder body 20 and the upper half of the cylinder portion 21 to expand in the axial direction and the perpendicular direction, and the head 60 of the insert body 40 When the insert body 40 is further pushed in until it passes the locking pieces 29a and 29b of the outer cylinder body 20, the locking pieces 2 of the outer cylinder body 20
A fastener characterized in that 9a and 29b can be deformed inwardly.