JP2600649Y2 - Screw grommet for round hole - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a screw grommet for a round hole, for example, for fixing two panels by polymerization.

[0002]

2. Description of the Related Art Conventional screw grommets of this type have structural differences in the details, but there are two types of screw grommets for square holes and round holes depending on the shape of the mounting holes formed in the panel side. Are commonly used. The grommet for a square hole has a body formed into a square cross section similar to the mounting square hole of the panel, and the square body is inserted into the mounting square hole of the panel. When the screw member is screwed into the body, the trunk is unlikely to co-rotate, but on the other hand, the grommet for round holes is formed by shaping the torso into a round cross section similar to the mounting round hole of the panel If a screw member is screwed into the insertion hole of the body, there is a risk that the round body will easily rotate together, making it impossible to obtain a reliable overlapping fixation between the panels. Had. The same can be said for the case in which the fixed state of the panel is released.

Further, when the mounting hole is formed in the panel side, if the mounting hole is a square hole, it must be punched out by a press. It can be easily drilled with simple tools such as, so if you want to fix the optional parts and service parts of the car to the body panel later, you can drill the mounting hole in the panel and make the round hole There are many cases that use screw grommets. Accordingly, there is a need in the art for a grommet for a round hole that can prevent corotation.

A screw grommet for a round hole capable of preventing such co-rotation is disclosed in, for example, JP-A-50-9.
An improved screw grommet disclosed in JP-A-7764 and JP-A-61-36720 is provided. Although these improved screw grommets are not specifically shown, basically, the insertion hole formed in the round body from the flange is not formed at the center of the body, but from the center. The grommet body is configured to be deflected to prevent corotation of the grommet body.

[0005]

Under the improved screw grommet, it is true that the screw member is screwed into the displaced insertion hole, and in particular, the wall surface of the body near the insertion hole and the wall surface are improved. And the wall of the body opposite to it expands into the edge of the mounting round hole and penetrates firmly, so that it is possible to effectively prevent the body from rotating together, but this time, the following problems A point will be invited. That is, even in the conventional grommet in which the insertion hole is formed at the center of the body, the hole alignment becomes a problem, but particularly when the insertion hole is deviated from the center, the body is attached to the panel mounting circle. Since the position of the insertion hole differs each time depending on the direction of insertion into the hole, the positional relationship between the insertion hole and the through-hole of the mating panel to be overlapped is very likely to occur. Therefore, this time, due to this shift,
It becomes difficult or difficult to insert the screw member into the insertion hole, and finally, there is a problem that it is difficult to obtain a reliable overlapped fixing state between the panels.

[0006]

SUMMARY OF THE INVENTION The present invention has been developed in order to effectively solve the problem of the conventional improved screw grommet, and has a body having a round cross section. Assuming a screw grommet for a round hole formed with an insertion hole for a screw member, a guide projection for guiding insertion of the screw member is provided in the center of the round body,
A configuration in which an annular insertion hole is formed around the guide projection is adopted.

[0007]

According to the present invention, although the insertion hole is formed in an annular shape, the insertion hole is formed around the guide projection provided at the center of the body. In this regard, the insertion hole itself is deviated from the center of the body, so that it is possible to prevent the body from rotating together when the screw member is screwed into the insertion hole. However, even if the round body is inserted into the mounting round hole of the panel from any direction, due to the annular shape of the insertion hole, the gap of the through hole of the mating panel that overlaps with the insertion hole is reduced. Since it can be absorbed effectively, the guide function of the above-mentioned guide projection is obtained, and the screw member can be smoothly inserted from the through hole of the mating panel into the corresponding hole of the annular insertion hole.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a screw grommet for a round hole according to an embodiment of the present invention.
2, as shown in FIG. 2, a disk-shaped flange portion 1 and a body portion 2 having a round cross section are provided. A screw member insertion hole is formed from the flange portion 1 to the inside of the body portion 2, and an outer periphery of the body portion 2 is provided. A plurality of temporary fixing shoulders 3 are protruded from the surface, and as shown in the figure, a pillar-shaped guide projection for guiding insertion of a screw member into the center of the body 2 as shown in the figure. 4
And that an annular insertion hole 5 is formed all around the guide projection 4. Therefore, under the present embodiment, the insertion hole 5 itself is deviated from the center of the body 2,
Since the insertion hole 5 is formed in an annular shape, the insertion range of the screw member can be significantly increased.

Therefore, when this screw grommet is used, the round body 2 is fitted into the mounting round hole H1 of one panel P1 and the other panel is mounted on the upper surface side of the flange 1 as in the prior art. P2 is placed on top of the other panel P
When the screw member 6 is screwed into the insertion hole 5 of the body 2 by obtaining the guide of the guide projection 4 from the through hole H2 of the body 2, the diameter of the body 2 expands outward, and FIG. As shown in the figure, two panels P1
P2 will be reliably polymerized and fixed. Further, in the screwing operation of the screw member 6, even under this embodiment,
Since the insertion hole 5 itself is deviated from the center of the body portion 2, the body wall surface near the screwing portion of the screw member 6 and the body wall surface facing the wall surface have the mounting round hole H1. Of the body 2 can be effectively prevented from rotating together.

In addition, in this embodiment, for example, the insertion direction of the body 2 into the mounting round hole H1 of one panel P1 is different, so that the insertion hole 5 and the other panel P2 can pass through each other. Even if the positional relationship of the holes H2 is displaced, the dislocation can be effectively absorbed by the action obtained from the annular shape of the insertion hole 5. Therefore, under the present embodiment, even if a displacement occurs due to the displacement of the insertion hole 5, the guide function of the guide projection 4 is obtained, and the screw member 6 is connected to the through hole of another panel P2. Since H2 is screwed into the corresponding hole portion of the annular insertion hole 5, a reliable overlap fixing state between the panels P1 and P2 can always be guaranteed.

[0011]

As described above, according to the present invention, by adopting the above-described structure, not only the insertion hole is deviated from the center of the body, but also the rotation of the body can be prevented. By expanding the insertion range of the member, for example,
Even if the positional relationship between the insertion hole and the through hole of the mating panel is misaligned, the misalignment is effectively absorbed, and the screw member is smoothly moved from the through hole of the mating panel to the corresponding hole of the annular insertion hole. Since it becomes possible to screw in the panel, it is possible to always ensure a reliable overlapping and fixing state between the panels. Therefore, the screw grommet for a round hole according to the present invention is not limited to this, but in particular, it utilizes a mounting round hole formed by drilling an optional part or service part of an automobile with a tool such as a drill later. Therefore, when it is fixed to the body panel side, it is very optimal.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a screw grommet for a round hole according to an embodiment of the present invention.

FIG. 2 is a plan view of the screw grommet.

FIG. 3 is a cross-sectional view of a main part showing a state where two panels are superposed and fixed to each other.

[Explanation of symbols]

 2 Round body 4 Guide protrusion 5 Annular insertion hole 6 Screw member P1 One panel H1 Same mounting round hole P2 Other panel H2 Same hole

Claims (1)

(57) [Scope of request for utility model registration] 1. A screw grommet for a round hole, comprising a body having a round cross-section and a screw member insertion hole formed in the round body, wherein the screw member is inserted into the center of the round body. A screw grommet for a round hole, characterized in that a guide projection for guiding the screw is provided, and an annular insertion hole is formed around the guide projection.