JP2736530B2 - Fasteners for fixing plastic workpieces - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastener device for fixing a plastic work to a vehicle body panel, such as fixing a plastic kicking plate to a body panel.

<Prior Art> According to Japanese Utility Model Publication No. 60-34805 of the present applicant, a tubular fastener member having a hollow tubular portion having an open upper end and formed of plastic to be mounted in a mounting hole of a panel is provided. The U-shaped metal plate having a pair of spaced side pieces is formed from a metal plate and is held in the tubular portion of the tubular fastener member, and the opposed distance between the pair of side pieces through the open upper end of the tubular fastener member. For fixing a plastic work comprising a U-shaped fastener member having a check tooth on each side piece of the pair, which bites into a protruding portion of the plastic work inserted downwardly to prevent the work from slipping upward. BACKGROUND Fastener devices are known. This fastener device mounts a cylindrical fastener member in which a U-shaped fastener member is previously held in a cylindrical portion by pushing the mounting member into a mounting hole of a panel, and projects a projection projecting from a plastic work such as a kick plate onto the cylindrical fastener member. The U-shaped fastener member is inserted into the opposing space of the pair of side pieces through the open upper end of the part, and is prevented from coming off by the check teeth on each side piece of the pair, and the work is fixed to the panel.

<Problems to be Solved by the Invention> In the above fastener device, in order to hold the U-shaped fastener member in the tubular portion of the tubular fastener member, each side piece of the pair of U-shaped fastener members has a direction opposite to the check tooth. The locking claw is provided outwardly, and the cylindrical portion of the tubular fastener member is provided with a notch through which the locking claw is hooked when the U-shaped fastener member is to be moved upward in the interior, whereby the U-shaped Once the fastener member is pushed into the tubular portion of the tubular fastener member, the U-shaped fastener member is held upwardly unextractable.

Therefore, when it becomes necessary to remove the once-fixed plastic work for some reason, the protrusion of the work must be forcibly pulled out from between the non-return teeth of the pair of side pieces that are biting. When it is pulled out, a deep scratch is generated by the check teeth on the surface of the soft projection, and the fixing force when the work is fixed by inserting the work again between the check teeth decreases.

<Means for Solving the Problems> Therefore, the fastener device of the present invention provides a tubular fastener member having a three-sided U-shaped notch at a portion facing each side piece of the pair of U-shaped fastener members. Besieged,
An elastic locking piece having a projection protruding into the cylindrical portion and having a free end facing upward is provided, and each side piece of the pair of the U-shaped fastener member is locked to the projection of each of the elastic locking pieces. A holding portion for preventing upward movement is provided, and the stopping force of the elastic locking piece for stopping the holding portion is determined by the stopping force of the protrusion of the plastic work by the non-return teeth of the pair of side pieces. Is also reduced.

<Example of Implementation> 1 is a cylindrical fastener member formed of plastic having a cylindrical portion 2 having an open upper end, and 3 is formed from a metal plate into a U shape having a pair of side pieces 5, 5 with an opposing interval 4 maintained. A U-shaped fastener member held in the tubular portion 2 of the tubular fastener member, wherein the upper end of each of the pair of side pieces has a diagonally downwardly facing non-return check which protrudes into the interior of the opposed space 4. The teeth 6 are stamped and provided.

The cross-sectional shape of the tubular portion of the tubular fastener member 1 is a rectangle having parallel long sides 2 ', 2'. The U-shaped fastener member 3 is formed by connecting the pair of side pieces 5, 5 to the long side 2 'of the tubular portion. , 2 '.

The lower half of each long side 2 ', 2' of the cylindrical portion 2 is provided with an elastic locking piece 8 whose free end faces upward by an inverted U-shaped cut 7 and each elastic locking piece is free. The end is provided with a thickened protrusion 9 protruding into the inside of the cylindrical portion.

Each side piece 5 of the pair of U-shaped fastener members is provided with a tongue piece 10 having a free end facing up by punching, and each tongue piece 10 has an upper surface in the cylindrical portion 2 of the cylindrical fastener member. When the U-shaped fastener member is accommodated by being pushed in from below, the holding portion passes below the protrusion 9 of the elastic locking piece 8 and is hooked and locked to the protrusion from below.
11 is provided bent outward. As a result, the upward movement of the U-shaped fastener member accommodated in the tubular portion of the tubular fastener member is restrained by the projection 9, and is held in the tubular portion.

A rectangular mounting hole having a size corresponding to the cross-sectional shape of the cylindrical portion of the cylindrical fastener member is formed in a plastic workpiece W, for example, a panel P of an automobile body to which a kicking plate is to be fixed. A projection 12 that protrudes into the opposing interval 4 between the pair of side pieces 5, 5 of the fastener member is provided integrally with the fastener member.

Then, in order to push the cylindrical fastener member into the mounting hole of the panel and mount it, in this embodiment, the outer side of the cylindrical portion protrudes outward from the outer periphery of the upper end, and an oval-shaped flange 13 is provided which contacts the edge of the mounting hole from above. And elastic locking pieces 8 on the upper sides of the long sides 2 ', 2'.
Similarly, a pair of second elastic locking pieces 14 with their free ends facing upward by notches in the inverted U-shape, and a pair of obliquely upward facing short sides connecting the ends of the long sides 2 ', 2'. A third elastic locking piece 15 is provided. The thickness of the second elastic locking piece 14 increases outward from the bottom to the top. Accordingly, when the tubular fastener member 1 is pushed into the mounting hole until the lower surface of the flange 13 contacts the upper surface of the edge of the mounting hole of the panel P, the tubular fastener member 1 is once bent inward and passes down through the mounting hole. The second and third elastic locking pieces 14 and 15 that have come out are elastically restored under the panel and are caught on the lower surface of the edge of the mounting hole.
Prevents the tubular fastener member from falling out of the mounting hole of the panel.

When using this fastener device, the U-shaped fastener member 3 is pushed into the tubular portion 2 of the tubular fastener member 1 and the U-shaped fastener member is locked by the projection 9 of the elastic locking piece 8 and the holding portion 11. While being held in the tubular portion 2, the tubular fastener member 1 is mounted in the mounting hole of the panel P as described above in this state (fourth embodiment).
(See FIG.) Then, the protrusion 12 of the plastic work W is inserted into the facing space 4 of the pair of side pieces 5, 5 of the U-shaped fastener member held in the tubular portion of the tubular fastener member, and the work W is removed. When the protruding portion 12 is to be moved upward, the check teeth 6, 6 on the pair of side pieces bite the protruding portion 12 to prevent the work from being detached. (FIG. 5).

In this case, the mounting force F ₁ of the second, third elastic latching pieces 14, 15 for mounting the tubular fastener member 1 in the mounting hole of the panel,
A retaining blocking force F ₂ of the projection 12 of the workpiece W by the check tooth 6 of the side pieces 5,5 of pairs of U-shaped fastener member, the projection 9 of the elastic latching pieces 8 pairs of tubular fastener member is U relationship restraining force F ₃ for restraining the holding portion 11 of the side pieces 5 of the pair of form fastener members, are determined such that _{F 1 ≧ F 2> F 3} .

Accordingly, a large than F _3, pulling the work W on the power of the lack magnitude greater than F ₂ and F _1, the elastic locking pieces 8,
8 is deformed outward, and at the same time, each tongue piece 10, 10 having the outward holding portion 11 is deformed inward, and the U-shaped fastener member 3 is moved by the check teeth 6, 6 on the pair of side pieces.抜 け 抜 け ゝ 突起 突起 突起 ゝ 付 い た ゝ ゝ ゝ ゝ ゝ ゝ 抜 け 抜 け
With the tubular fastener member left in the mounting hole of the panel, the work W is detached from the panel with the U-shaped fastener member (No. 6).
Figure). Then, after inspecting and maintaining the portion hidden or covered by the work W, the protrusion 12 is pushed from above into the tubular portion of the tubular fastener member in which the U-shaped fastener member 3 is engaged. , it is possible to secure the workpiece to the panel in the original unchanged and stop force F ₃ force.

This also means that the U-shaped fastener member 3 was not initially accommodated and held in the tubular portion of the tubular fastener member, but was inserted and mounted on the projection 12 of the work W, thus mounting the U-shaped fastener member. This means that the work can be fixed to the panel by pushing the protrusion 12 of the work into the cylindrical part of the tubular fastener member mounted on the panel. That is, whether the U-shaped fastener member 3 is initially housed in the tubular portion of the tubular fastener member or is held and held on the protrusion 12 of the plastic work is determined according to ease of use. do it.

In this embodiment, the lower end of the tubular portion 2 of the tubular fastener member is closed by the blind bottom wall 16, but may be opened similarly to the upper end.

Further, as is apparent from FIG. 3, the check teeth of one side piece of the U-shaped fastener member are staggered so as to be located at the interval of the check teeth of the other side piece. As shown in FIG. 7, the obliquely downward length of the check teeth 6 of each side piece 5 may be extended so as to intersect and overlap each other from the central axis of the U-shaped fastener member. 6 is work W
It is possible to further increase the holding force for holding the projection 12.

In this document, since the tubular portion 2 of the tubular fastener member 1 and the pair of side pieces 5, 5 of the U-shaped fastener member in FIG. 1 of the embodiment are respectively oriented in the vertical direction, it is easy to understand based on this. Although described in the upper and lower relationship, the upper part in this document may naturally face down, sideways or oblique depending on the use condition, so the upper and lower relationship is not absolute I want to be understood.

When removing the plastic workpiece from the panel according to the present invention <Effects of the Invention> not wear and tear projections of said workpiece at all, therefore, reliably panels remove the workpiece from the number of times the panel in the same restraining force F ₃ Can be provided. Further, the U-shaped fastener member made of a metal plate is not necessarily housed and held in the tubular portion of the tubular fastener member at first, but the work can be inserted into the projecting portion of the work from the beginning and fixed and placed. Can be fixed to the fastener device, and the convenience is not limited.

[Brief description of the drawings]

Drawings show one embodiment of the present invention, FIG. 1 is a perspective view of a disassembled state of a tubular fastener member and a U-shaped fastener member, FIG. FIG. 3 is a plan view of one half of FIG. 2 from above and the other half from below, FIG. 4 is a side view in vertical section, FIG. 5 is a sectional view of a used state where a work is fixed to a panel, FIG. FIG. 7 is a cross-sectional view of a state where the work is removed from the panel, and FIG. 7 is a side view of another example of the U-shaped fastener member. In the drawing, 1 is a tubular fastener member, 2 is its tubular portion, 3 is a U-shaped fastener member, 5, 5 is a pair of side pieces, 4 is a facing interval between the side pieces, 6 is a non-return tooth, and 8 is elastic. A locking piece, 9 is a projection thereof, 10 is a tongue piece, 11 is a holding portion, 12 is a projection of the work W, and P is a panel.

Claims (1)

(57) [Claims] 1. A U-shaped fastener having a hollow cylindrical portion having an open upper end, a cylindrical fastener member formed of plastic and mounted in a mounting hole of a panel, and a pair of side pieces spaced apart from each other.
A projection of a plastic work formed from a metal plate and held in the cylindrical portion of the tubular fastener member, and inserted downward through the open upper end of the tubular fastener member into the facing space between the pair of side pieces. Having non-return teeth on each side piece of the pair to prevent the work from slipping upward by engaging with
In the fastener device for fixing a plastic workpiece comprising a fastener member, the tubular portion of the tubular fastener member is formed in a three-sided manner by an inverted U-shaped notch at a portion facing each side piece of the pair of the U-shaped fastener member. And an elastic locking piece with a free end facing upward having a projection protruding into the cylindrical portion is provided, and each side piece of the pair of the U-shaped fastener members is provided with a projection of each of the elastic locking pieces. A retaining portion is provided which is locked to prevent upward movement, and the stopping force of the elastic locking piece for restraining the retaining portion is applied to the protrusion of the plastic work by the non-return teeth of the pair of side pieces. A fastener for fixing a plastic work, which is made smaller than the stopping force.