JPS6034805Y2 - Fastener device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fastener device for attaching a molded product having protrusions made of a soft material such as plastic to a metal panel.

For example, in a vehicle, when attaching a vent member, which is a plastic molded product, to the vehicle body, conventionally, the first and second
A lip or fastener device was used as shown.

In each case, a fastener 1.1' is attached to the mounting hole H drilled in the vehicle body or metal panel P by a simple pushing operation, and a protrusion 2.2' previously provided on the molded product M is attached to this fastener 1.1'. It is inserted and engaged.

Although the mechanism or principle of such attachment is advantageous in that it requires a single push-in operation from one side, conventional such fasteners have been disadvantageous in more practical aspects.

The conventional fastener 1 shown in FIG. 1 is entirely stamped and molded from a metal sheet, and has a generally U-shaped main body 3.
On both sides thereof, outward locking claws 4.4 and inward non-return claws 5, 5 are punched out, respectively, and the upper end of the U shape is a folded flange edge 6, 6 bent outward. There is.

Then, the main body 3 is inserted from the tip into the mounting hole H of the panel P, and after passing through the hole edge while bending the outward locking claws 4, 4 inward, it is restored and the locking claws 4, The upper end of the fastener 4 and the folded flange edges 6, 6 are attached to sandwich the panel P from both sides, and the protrusion of the member or molded product M is press-fitted between the U-shape of the fastener 1 attached in this way, so that the inward direction This protrusion 2 is prevented from returning at the lower ends of the non-return claws 5, 5.

Since this fastener 1 is made of metal, it is relatively stable in supporting the molded product M, but the rigidity of the material is rather a problem, and when the fastener 1 is inserted into the mounting hole H, the locking claws 4, 4, etc. It is easy to damage the edge of this mounting hole of P, and especially when the metal panel is a vehicle body as mentioned earlier, when installing exterior parts such as molded product M, there are times when this panel P has already been painted. In many cases, the paint film is peeled off by the locking pawls 4, 4, and rust is likely to form thereon, resulting in a problem in that the appearance of the product is significantly impaired.

On the other hand, the conventional fastener 1' shown in the second figure has an overall 3
′ is a plastic molded product, so it can be snapped onto the edge of the mounting hole using the retaining shoulders 4′, 4′ formed on the sides and the upper flange 6′ without damaging the metal panel P. The protrusion 2' formed in the main body 3' is locked only by strong fitting into the small diameter hole 5' passed through the main body 3', so the locking force is weak.

For example, even if a non-return relationship is used between the non-return claw and the shoulder surface instead of this strong fitting, the fastener is made of a soft material 1 such as plastic, and the protrusion 2' of the molded product M is also made of plastic or the like. Since the material is a soft material, such a retaining relationship between the soft materials essentially lacks the locking force.

The present invention has been developed in light of the above, and its main purpose is to provide a fastener device that can sufficiently lock molded products having protrusions made of soft material without damaging metal panels.

Hereinafter, embodiments of the present invention shown in the third to fifth figures will be described.

A mounting hole H is opened in the metal panel P, and a protrusion 2 made of a softer material than metal, such as plastic, is provided on the molded product M (generally, the molded product and the protrusion are integrally molded from the same material). Although this is the same as before, the fastener device 10 of the present invention that connects these two components differs from the conventional single-structure device in that it uses a pair of fastener members 11 and 12.

That is, there is a first plastic fastener member 11 that snaps into the mounting hole H of the metal panel P, and a second metal fastener member 12 that locks the protrusion 2 of the plastic molded product M. The two fastener members are also snapped together in a male-female relationship.

The first fastener member 11 is entirely made of plastic and is integrally molded, and as can be seen from the half-sectional plan view in FIG. An insertion hole 14 is drilled in the axial direction to allow insertion of the second fastener member 12 and the projection 2, while at least a portion of the outer surface of the main body, in this case the upper and lower sides in FIG. H
an engagement surface 15.15 that snaps onto the hole edge in a known manner;
is formed.

A flange 16 is provided with respect to this engagement surface 15 and extends in the direction perpendicular to the axis at a distance that is equal to or slightly narrower than the thickness of the panel P.

The main shape of the illustrated first fastener member 11 is an elliptical cylinder, and the insertion hole 14 is also formed as a through hole with an elliptical cross section.

The second fastener member 12 is a sheet metal molded product,
The main body 17 has a U-shape as a whole with a tip portion 18 slightly gently bent by 180°.

A space 20 is formed between the U-shaped side surfaces 19 and 19 for inserting the protrusion 2 of the molded product M, and the tip 18 serving as a connecting portion between both side surfaces preferably has spring properties. .

Each side surface portion 19 is provided with a locking pawl 21 facing outward and toward the open end of the U-shape, and a check pawl 22 facing inward toward the back of the U-shape by press punching. .

In this embodiment, one locking pawl 21 is provided approximately at the center of each side surface, and one check pawl 22 is provided on each side of each side surface, for a total of four check pawls 22.

However, these claws 21, 22 may be provided only on one side surface.

Further, the U-shaped open end of each side portion is folded back outward to form a folded edge or flange edge 26,26.

Although the procedure for attaching a molded article using the present fastener device is arbitrary to the extent that it is as described below, here, the most common attaching procedure will be illustrated and the explanation will be continued along this procedure.

First, the second fastener member 12 is inserted into the insertion hole 14 of the first fastener member 11 from its tip 18 (arrow A1).

In order to facilitate initial insertion at this time, the entrance 23 of the insertion hole 14 is tapered and opens in the shape of a funnel.

Further, in this embodiment, the second fastener member is inserted so that each side surface 19.19 of the second fastener member is aligned with the inner wall surface 24.24 of the insertion hole 14 in the short axis direction.

Therefore, the aforementioned locking claws 21 protruding from each side surface,
21 are bent inwardly by the inner wall surfaces 24 and 24 of the insertion hole, or are moved toward each other so that both side surfaces 19 and 19 overcome the spring force of the tip 18 forming the U-shape. The inner wall surface of the insertion hole 24.
When the locking claws 21, 21 are aligned with the locking recesses 25, 25 provided in the grooves 24, the claws 21.21 are moved into the corresponding recesses 25.2 by the restoring force of the claws themselves or by the restoring force of the tip spring portion 18.
5 and lock it (Fig. 5).

Furthermore, in order to prevent the second fastener member 12 from further intruding beyond this position, the second fastener member 12 is provided near the entrance of the insertion hole 14 of the first fastener member at a predetermined entry position of the second fastener member. Locating shoulders 27, 27 are formed which abut the flange edges 26, 26 of the fastener member.

Furthermore, in this embodiment, the insertion hole 14 of the first fastener member
Since the width of the second fastener member in that direction is shorter than the width in the longitudinal direction, the second fastener member does not shift in the longitudinal direction after both fastener members are assembled as described above. so that both sides 19.1 of the second fastener member
The inner wall surface portion of the insertion hole that contacts each of the side surfaces 19,
19, it is a groove with a width that is approximately open or slightly thicker, and both side surfaces 28 and 28 of this groove are used as position regulating surfaces.

Further, this groove serves as a guide groove for inserting the second fastener member.

Of course, both side surfaces of the recess 25 into which the locking pawl 21 is fitted also have an additional function of preventing slippage.

Next, the fastener device 10 as a whole assembled in a non-returning manner as described above, or the first fastener member 11 containing the second fastener member 12, is then attached to the panel P from its tip as shown by arrow A2. Insert into mounting hole H.

This connection between the panel P and the first fastener member 11 is a normal snap connection.

That is, with the above-mentioned insertion, the tapered protrusion 29.29 from the tip extending to the above-mentioned locking surface 15.29 provided on the outer surface of the first fastener member 11 is forcibly bent due to the elasticity of the material. It passes through the hole H, and when the retaining surface 15.15 is cut out on the hole surface, it restores its original shape, and the panel P is sandwiched between this surface 15, 15 and the flange 16, which has the same dimensional relationship as before. Attach it (Figure 5).

However, this snap-locking mechanism and its configuration are arbitrary, and this proposal does not directly stipulate this.

Finally, as shown by arrow A3 (Fig. 3), plastic surgery M
The molding technique M is pressed against the panel P so that the protrusion 2 is inserted into the insertion hole 14 of the first fastener member 11 and into the space 20 between both side surfaces of the second fastener member 12. .

Then, since the non-return claws 22 provided on each side of the second fastener member are raised inward facing the back, when the protrusion 2 enters, they are bent outward by the outer surface of the protrusion. Although it does not interfere with the penetration, after inserting the protrusion 2 to the specified depth,
That is, as shown by the imaginary lines in FIG. 5, when the plasticizer M is attached to a predetermined position approximately along the panel P and then attempted to be pulled out, the outer surface of the protrusion 2 acts to trigger each non-return pawl 22. As a result, the non-return claw 22 bites into the outer surface of the protrusion 2 more deeply, making it impossible or difficult to pull it out.

With this, the installation of the molding technique M to the panel has been completed, but in particular, since the protrusion that acts to cause the non-return claw 22, which is made of metal and has high rigidity, is made of a relatively soft material, the non-return claw 22 The more you try to force it to happen, the more the claws will dig into your own flesh, creating a rational relationship that works in the direction of increasing the stopping force.

Furthermore, even if this pulling force transfers to a force that attempts to pull out the entire second fastener member 12 from the first fastener member 11, the locking pawl 21 of the second fastener member 12 is still made of metal and has a rigidity. On the other hand, since the forming surface of the first fastener member engaging recess 25 that engages with this is made of a soft material, this pulling force does not damage the claw 21.
Rather, the result is that biting into the surface on which the engagement recess 25 is formed is promoted, so that a reasonable result can be produced here as well.

The same holds true for the relationship between the first fastener member 11 and the panel P. Since the first fastener member clings to the firm panel P, the desired result is that although installation is easy, there is strong resistance to removal. is obtained.

In the end, according to the present device, it is possible to lock the panel P without damaging the panel P like in the past, and since the engagement relationship between each part is that one is made of metal and the other is made of soft material, it is difficult to remove it. It is possible to obtain the effect of high

Below, experimental considerations and modification examples regarding the proposed device will be listed.

In the illustrated case, removal of the plastic surgery M is prevented only by the bite of the check claw 22 into the protrusion 2.

As mentioned above, this will provide sufficient resistance to pull out, and if necessary, if you want to remove the plastic surgery M, you can intentionally pull it out with an extremely large force and it will not fail to pull out. If such a situation is expected, it may be left as is, but if you want to obtain a stronger non-return force, an engaging recess or an engaging stepped portion that engages with the non-return pawl 22 on the outer surface of the protrusion 2 may be added. Just set it up.

In the illustrated case, the protrusion 2 of the molding technique M has a hollow elliptical cross-sectional shape, but this is of course arbitrary, and since the insertion hole shape of the fastener member is arbitrary in the first place, it is sufficient to match this shape.

If the outer shape of the first fastener member 11 is an elliptical cross-sectional shape or a non-circular cross-sectional shape as shown in the figure, a rotation-preventing effect will be produced with respect to the panel P, but if there is no particular need, a circular cross-section may be used.

In theory, it is possible to provide a plurality of protrusions 2 on the molding technique M as needed, and apply the proposed device to each one of them.

The distance between the side surfaces 19.19 of the second fastener member 12 is preferably wider than the width between the corresponding inner wall surfaces 24.24 of the second fastener member 12 before insertion.

If this is done and the connecting portion or tip spring portion 18 is pushed and bent during insertion into the insertion hole 14,
With the force of this tip spring portion 18, both side portions 19.19 can be brought into frictional pressure contact with each corresponding wall surface 24.24,
It is possible to prevent the second fastener member from rattling within the first fastener member after the first and second fastener members are assembled together.

In the illustrated case, the tip spring portion 18 is narrower than the width of both side portions 19, but by appropriately determining this width, the spring force can be adjusted.

However, in some cases, even if the tip 18 does not have particular spring properties, it may be used simply as a member for connecting the side surfaces 19, 19 at a distance.

In addition, instead of connecting the front ends of both side parts 19 and 19 with the connecting part 18, the second fastener member 12 connects the side parts of both side parts with each other in a U-shape as shown by imaginary lines in FIG. They may be connected by a connecting part such as.

In this case, the U-shaped connecting portion 18 naturally surrounds the side surface of the protrusion 3 of the plastic surgery M.

Note that it is obvious that the insertion hole 14 of the first fastener member may be a blind hole as long as it has a necessary depth.

Furthermore, the assembly procedure of the fastener device 10 of the present invention is not limited to the procedure described above.

For example, they can be assembled in the order of arrow □, A□, and A2.

First, the second fastener member 12 is molded using the arrow A3.
After attaching it to the first fastener member 11 using the arrow A□
When combined with this, the first fastener member is sandwiched between this molding technique M and the locking claw 21 of the second fastener member.
In addition, since the surface having the protrusion 2 of the molding technique M can serve as the flange edge 26 of the second fastener member and the shoulder surface 27 of the first fastener member, it can be engaged with the flange edge 26 of the second fastener member. Shoulder surface 27 of the first fastener member
can also be omitted.

After that, if the entire panel is attached to the panel P in the direction of arrow A2, the panel can be pressed between the molding technique M and the engaging surface 15 on the outer surface of the first fastener member, so depending on the case, the first fastener member The flange 16 of the member 11 can also be omitted.

In addition, as shown in the figure, the protrusion 2 is wider than the width of the second fastener member.
If it is wider, the relative positional error of the plastic surgery M can be absorbed, and if there are a plurality of non-return claws 22, not only is it stable, but the ability to absorb attachment errors is further increased.

As described in detail above, according to the present invention, the engagement relationship of each part from the panel P to the molding technique M is a combination of metal-soft material-metal-soft material, so that the metal panel is not damaged. Moreover, it has the advantage that sufficient bonding strength can be obtained without impairing workability.

[Brief explanation of drawings]

Figures 1 and 2 show how to mold soft material with protrusions into metal 4.
Fig. 3 is an exploded perspective view of an embodiment of the fastener device of the present invention, Fig. 4 is a side view of a half cross-section of the first fastener member, and Fig. 5 is a view of a conventional fastener device attached to a flannel, and Fig. 5 is a view after the installation work is completed. FIG. 3 is a longitudinal cross-sectional view of the present fastener device in a state. In the figure, 2 is a projection provided in the plastic surgery, 10 is the entire fastener device, 11 is a first fastener member, 12 is a second fastener member, 14 is an insertion hole, 15 is an engagement surface, 18 is a connecting portion, 19 is a side part, 20 is an insertion space, 21 is a locking claw, 22
2 is a check claw, and 25 is an engaging recess.

Claims (1)

[Claims for Utility Model Registration] In a fastener device for attaching a molded product having a protrusion of a soft material to a metal panel at the protrusion, a plastic material having an engaging surface on the outer surface of the main body and being engaged with the mounting hole of the panel. A first fastener member made of acid, and a second fastener member made of metal inserted into an insertion hole drilled in the main body of the first fastener member, the second fastener member having a pair of both side portions connected to each other. A hollow space is formed between the two side parts for inserting the protrusion of the molded product,
A locking pawl that locks on the wall surface of the insertion hole of the first fastener member and a non-return pawl that locks on the protrusion of the molded product are provided, and the first fastener member is provided on the wall surface of the insertion hole of the second fastener member. A fastener device comprising a locking recess into which the locking pawl is caught when the fastener device is inserted.