JPH0454326Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Field of Industrial Application" The present invention relates to an improvement of a screw grommet for fixing, for example, two panels together or a panel and a decorative material by polymerization.

``Prior art'' As a conventional grommet of this type,
There is one shown in Publication No. 50810.

Although not shown in detail, the conventional grommet is integrally molded from synthetic resin, and the grommet main body is composed of a pair of divided bodies consisting of a flange portion and a leg portion, and the pair of divided bodies are separated from each other by separate legs. They are connected via a single U-shaped thin hinge connected to the leading edge of the part, and grooves defining insertion holes for screw members are formed on the opposing inner surfaces of each divided body. .

In actual use, the pair of divided bodies are brought close to each other, and the legs of each divided body are inserted into the rectangular through holes bored in one panel.
Align the through holes drilled in other panels with the insertion holes defined by the grooves on the inner surface of each divided body, screw the screw member into the insertion hole, and then The two panels are overlapped and fixed by expanding and moving the screw member outward according to the diameter of the screw member.

``Problems that the invention attempts to solve'' However, in conventional screw grommets, the pair of divided bodies that make up the grommet body are connected to one U-shaped thin wall connected to the tip edge of each leg. Since the structure is connected by a hinge, each divided body will expand in a direction away from each other.

For this reason, conventionally, when inserting into a through hole in one panel, the unfolded pair of divided bodies had to be brought close to each other and then inserted into the through hole, which made the insertion work easier. This had a major problem that made it unnecessarily complicated.

Furthermore, in the structure in which the tip edges of the legs are connected by a thin hinge, the existence of the thin hinge restricts the length dimension of the screw member to be used. I hated it because it lacked sex.

In addition, in conventional screw grommets, the outer circumferential surface of the leg of each divided body is simply pressed against the hole edge of the panel through hole, so depending on the diameter of the screw member used, etc., the hole edge of the leg There is also the problem that if the strength of the pressing force against the panel varies, the state of adhesion to the panel through hole becomes unstable.

``Means for Solving the Problems'' Therefore, the present invention was developed to effectively solve the problems of conventional grommets. The screw groove is composed of a pair of divided bodies, the pair of divided bodies are connected to each other via a thin hinge, and a groove defining an insertion hole for a screw member is formed on the opposing inner surface of each divided body. The above-mentioned pair of divided bodies are connected to each other via two thin-walled hinges connected to both side edges of each flange part, and square shaped A structure is adopted in which the engaging grooves that engage the hole edges on two sides defining the panel hole are formed in opposite directions.

"Operation" Accordingly, in the present invention, the pair of divided bodies constituting the grommet main body are connected via two thin hinges connected to both side edges of the flange portion, and each divided body Since the legs are always maintained in a facing relationship with a constant spacing between them, the insertion operation of inserting the legs into the panel holes can be performed extremely smoothly.

In addition, when the screw member is screwed into the insertion hole defined by the groove on the inner surface of each divided body and each divided body is expanded and moved outward, it will rotate in the opposite direction to the outer circumferential surface of the base of each leg. Since the hole edges on the four sides defining the rectangular panel hole will fit into the engagement groove formed in the hole, the pressure force of the leg against the hole edge may vary depending on the diameter of the screw member used, etc. Even if this occurs, the state of adhesion to the panel hole is stable, and the reliable state of superimposition and fixation of the panel is ensured.

``Example'' Hereinafter, the present invention will be described in detail based on an example illustrating the present invention.The screw grommet according to the example is also an integrally molded product of synthetic resin, and is shown in FIGS. 1 and 2. As shown, the grommet main body is composed of a pair of divided bodies 1A and 1B consisting of a flange part 2 and a leg part 3, and the pair of divided bodies 1A and 1B are connected to each other via a thin hinge, and each divided body 1A , 1B are each formed with a groove 4 defining an insertion hole 5 for a screw member on the opposing inner surfaces thereof, and is characterized by the following configuration.

That is, in this embodiment, a pair of divided bodies 1
Each of the flange portions 2 of A and 1B is formed so as to have a substantially rectangular planar shape, and a leg portion 3 having a tapered outer surface 3a is integrally hung from the lower surface of each flange portion 2. Between the divided bodies 1A and 1B,
A configuration is adopted in which each of the flange portions 2 is connected via two U-shaped thin hinges 6 connected to both side edges.

Therefore, the pair of divided bodies 1A and 1B constituting the grommet main body are always held in a relationship facing each other at a constant distance by the two thin hinges 6 connected on both sides, which is different from the conventional method. As a result, there is no possibility that the divided bodies 1A, 1B will develop in a direction away from each other.

In addition, in this embodiment, a pair of divided bodies 1A,
1B, L-shaped engagement grooves 7 are formed in opposite directions on the outer circumferential surface of the base of each leg 3 of the panel 1B to engage the edges of the two sides of the square panel through-hole. The leg part 3 is configured to be able to reliably engage the hole edge of the panel through hole with a certain engagement width via the engagement groove 7 not only on its outer surface but also on one side surface.

Therefore, in this embodiment, as shown in FIG. 2A, the vertical position of each leg 3 with respect to the flange 2 is set by the width of the engagement groove 7 formed on the side surface of the leg 3. It is assumed that the grooves are formed to be shifted by L, and a tapered surface 3b is also formed on the side surface where the engagement groove 7 is formed.

Therefore, when fixing the two panels P1 and P2 together using a screw grommet with such a configuration, first, the leg portions 3 of each of the divided bodies 1A and 1B are drilled into one panel P1. Insert it into the rectangular through hole H1.

Note that when inserting the leg portion 3, the pair of divided bodies 1A and 1B are always placed in a relationship facing each other with a constant distance between them by means of two thin hinges 6 connected to both side edges of the flange portion 2. Since the legs 3 are held in place, the insertion work of the legs 3 can be performed extremely smoothly, and the legs 3 can be inserted smoothly as they approach each other due to the action of the tapered outer surface 3a.

Further, as mentioned above, since the positions of the leg portions 3 of each of the divided bodies 1A and 1B are shifted, when inserting into the through hole H1, as shown in FIG. Then, each leg 3 passes through the through hole H1 of the panel P1 with the misalignment corrected via the thin hinge 6.

The legs 3 of each divided body 1A, 1B are connected to the through hole H.
1, the elastic restoring force of the two thin hinges 6 causes the legs 3 to return to their original position and at the same time automatically move in the direction of separation. The edge of the rectangular through hole H1 engages in the L-shaped planar engagement groove 7 formed in opposite directions in each leg portion 3.

Therefore, after that, the screw member 8 is inserted by aligning the through hole H2 drilled in the other panel P2 with the insertion hole 5 defined by the groove 4 on the inner surface of each divided body 1A, 1B. Each divided body 1 is screwed into the insertion hole 5.
When A and 1B are moved outwardly to expand, the two panels P1 and P2 are fixed in an overlapping manner, as shown in FIG.

Moreover, when the panels are in the overlapping and fixed state, as shown in FIG. Since the hole edges on the four sides defining the rectangular through hole H1 will be inserted with sufficient engagement width, the leg portion 3 may be pressed against the hole edge depending on the diameter of the screw member 8 used. Even if the force is strong or weak, panel P1
The state of fixation to the through hole H1 is stabilized and ensured,
This ensures that the two panels P1 and P2 are securely superimposed and fixed, and also exhibits a waterproof effect.

In this embodiment, it goes without saying that the grommet main body and the screw member 8 can be stored separately, but the thin hinge 6 connected to the flange portion 2 allows the divided bodies 1A and 1B to be kept at a constant interval. Taking advantage of the fact that they are held in a confronting relationship,
It is also possible to store and transport the screw member 8 with the screw member 8 temporarily inserted into the insertion hole 5 in advance.

``Effect of the invention'' As described above, the invention allows a pair of divided bodies to
Each flange is connected via two thin hinges connected to both side edges, and hole edges on two sides defining a square panel hole are provided on the outer peripheral surface of the base of the leg of each divided body. Since the engaging grooves are formed in opposite directions, the pair of divided bodies are always kept in a constant state by two thin hinges connected to both sides of the flange. Since the legs are held in spaced-apart, opposing relationship, the operation of inserting the legs into the panel holes is extremely smooth and easy.

Moreover, the fact that the thin hinges connecting the pair of divided bodies are connected to both side edges of the flange portion is different from the conventional method, and there is no restriction on the length of the screw member used.

In addition, when the screw member is screwed into the insertion hole defined by the groove on the inner surface of each divided body to expand and move each divided body outward, the screw member is screwed into the insertion hole defined by the groove on the inner surface of each divided body. Since the hole edges on the four sides defining the square panel hole will actively engage in the formed engagement groove, the pressure contact force of the leg against the hole edge may vary depending on the diameter of the screw member used, etc. Even if strength or weakness occurs, the state of adhesion to the panel hole is stable, and the reliable state of superposition and fixation of the panel is ensured.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a screw grommet according to an embodiment of the present invention, and FIG. 2A is an A-A in FIG. 1.
Line sectional view, Figure B is a sectional view taken along line B-B in Figure 1, Figure 3 is a plan view illustrating the state in which the grommet body is inserted into the through hole of the panel, and Figure 4 is a diagram showing two panels stacked together. FIG. 5 is a longitudinal cross-sectional view showing the fixed state, and FIG. 5 is a cross-sectional view of the same. 1A, 1B...Divided body, 2...Flange part, 3
... Leg, 4 ... Concave groove, 5 ... Insertion hole, 6 ... Thin hinge, 7 ... Engagement groove, 8 ... Screw member, P
1, P2...Panel, H1, H2...Through hole.

Claims (1)

[Scope of utility model registration request] The grommet main body is composed of a pair of divided bodies consisting of a flange part and a leg part, and the pair of divided bodies are connected to each other via a thin hinge, and an insertion hole for a screw member is provided on the opposing inner surface of each divided body. In the screw grommet, which has concave grooves that define each other, the pair of divided bodies are connected to each other via two thin hinges connected to both side edges of each flange, and each divided body is A screw grommet characterized in that engagement grooves for engaging the edges of two sides of a rectangular panel hole are formed in opposite directions on the outer peripheral surface of the base of the leg.