JPH0346893Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to attachment technology for soft articles, and in particular, various types of embeddings for attachment or connection to molded articles made of soft materials such as rubber and soft synthetic resins. The present invention relates to an embedded part structure of an embedded bolt in a soft material with excellent functionality, in which the base of the bolt is embedded and integrally molded, and the bolt is fastened and fixed to other articles.

[Prior Art] Conventionally, an embedded bolt 50 as shown in FIG.
Many structures are used in which the base 51 of the molded article 52 is insert-molded into a part of the molded article 52 so that a threaded portion protrudes, and the projected threaded portion is used for attaching or connecting the molded article 52.

[The problem that the idea aims to solve]

However, in the conventional configuration described above, when the molded article 52 is made of a soft material such as rubber or soft synthetic resin, even if the base 51 of the embedded bolt 50 is configured to have a large area,
When the attached part 53 is strongly fastened with a nut 54 or the like, and a tensile load is applied to the embedded bolt 50, the soft material in the shin part of the base part 51 swells in the outer radial direction and the structure of the part collapses. Therefore, there was a problem in that sufficient resistance required for fastening could not be obtained.

The present invention was devised in view of the above-mentioned problem, and is intended to strengthen the base of an embedded bolt in a molded article made of a soft material such as rubber or soft synthetic resin so as to provide sufficient resistance for fastening. The object of the present invention is to provide an embedded part structure of an embedded bolt in a soft material formed by embedded integral molding.

[Means to solve the problem]

In order to achieve the above object, the embedded part structure of the embedded bolt in the soft material according to the present invention is suitable for various embedded bolts such as those for attachment or connection to molded articles made of soft materials such as rubber and soft synthetic resin. In the structure in which the base is embedded and integrally molded, a resistance plate having an appropriate extent in a direction substantially perpendicular to the axial direction of the embedded bolt is integrally or integrally formed at the base of the embedded bolt, and the entire periphery of the resistance plate or Part of it has a convex curved part,
The extending portion continuous with the convex strip forming portion forms a hanging portion extending in the protruding direction of the embedded bolt, and the embedded bolt base including the resistance plate is insert-molded into a part of the molded article. This is a summary.

[Effect]

Since the base of the embedded bolt is integrally formed with a resistance plate having an appropriate extent in a direction approximately perpendicular to the axial direction of the embedded bolt, a tensile load in the axial direction is applied to the embedded bolt. In this case, the soft material at the lower part of the shin of the resistance plate is crushed and tends to bulge in the outer radial direction, but if the entire periphery or a part of the resistance plate is bent in the direction of protrusion of the embedded bolt. Because the hanging part is configured, the amount of crushing deformation of the soft material between the hanging part and the mounting surface is large, and the internal stress in this part is therefore larger, causing the soft material around the embedded bolt to collapse. It acts to prevent protrusion. As a result, the apparent internal stress with respect to the tensile force of the embedded bolt becomes large, making it possible to respond to a strong fastening force.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the structure of an embedded part of an embedded bolt in a soft material according to the present invention will be described below with reference to the drawings.

1 to 3 show a first embodiment of the present invention, which is a structure for attaching an automobile headlamp cleaner to a bumper.

In the drawings, reference numeral 1 denotes a nozzle case made of rubber or soft synthetic resin, in which a nozzle holder 3 with a cleaning water injection nozzle 2 installed on the upper part is installed vertically at approximately the center, and the mounting base 4 of the nozzle case 1 is attached to a bumper. The structure of the present invention is adopted for the mounting structure fixedly installed on the upper surface of a. Reference numeral 5 denotes an embedded bolt in which a head 6 of various shapes such as a disk shape or a rectangular disk shape is inserted into the thickness of the mounting base 4, and the threaded portion 7 of the embedded bolt 5 is inserted into the lower surface of the mounting base 4. A resistance plate 8 having various shapes such as a rectangular or circular shape having an appropriate area is fitted under the shin of the head 6 and is insert-molded together with the embedded bolt 5. On both side edges of the resistance plate 8, a hanging portion 10 is formed, which is continuous with the convex strip forming portion 9 and whose tip is directed in the direction in which the embedded bolt 5 protrudes.
In addition, the extending portion thereof is further curved laterally.

When installing the above automobile headlamp cleaner on a bumper a, insert the threaded part 7 of the embedded bolt 5 into the mounting hole b drilled in the bumper a as shown in Fig. 3, and The screw part 7
Screw the nut 11 onto the holder to complete the installation. When the nut 11 is firmly rotated during the above-mentioned fastening, a tensile load is applied to the embedded bolt 5 in the removal direction, so the soft material A at the lower part of the shin of the resistance plate 8 is crushed by this tensile load. However, the convex strip forming portion 9 is formed on the circumference of the resistance plate 8.
Since the hanging portion 10 following this is configured, the amount of crushing deformation of the soft material B between the hanging portion 10 and the mounting surface of the bumper a is large, and therefore the internal stress of the portion B is reduced to the portion A. This becomes larger than the internal stress of , and acts to prevent the soft material A from protruding around the embedded bolt 5. As a result, the internal stress that grips the embedded portion of the embedded bolt 5 relative to the tensile force of the embedded bolt 5 increases, and a strong fastening force is exerted.

FIGS. 4 and 5 show other embodiments of the present invention in which the shapes of the resistance plates are different.

The resistance plate 8 in FIG. 4 has a hanging portion 1 on the entire periphery.
0, and the resistor plate 8 in FIG.
In this example, a plurality of embedded bolts 5 are arranged in series.

As can be seen from the above-mentioned modifications, it goes without saying that the present invention can be modified in various ways or used without changing the essence of the invention.

[Effect of idea]

Since the structure of the embedded part of the embedded bolt in the soft material according to the present invention is constructed as described above, sufficient resistance force necessary for fastening the embedded bolt insert-molded into the molded article made of the soft material can be obtained. It has the characteristic of being able to be strongly integrated as in
The practical effects after implementation of this invention are extremely large.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of an automobile headlamp cleaner showing an embodiment of the embedded structure of the embedded bolt in a soft material according to the present invention, Fig. 2 is a perspective view of the same main part, and Fig. 3 4 and 5 are perspective views showing different embodiments of the resistance plate, respectively, and FIG. 6 is a sectional view showing a conventional technique. 4... Mounting base, 5... Embedded bolt, 6... Head, 7... Screw part, 8... Resistance plate, 9... Convex strip forming part, 10... Hanging part, 11... Natsuto.

Claims (1)

[Claims for Utility Model Registration] In a structure in which the bases of various types of embedded bolts are embedded and integrally molded for attachment or connection to molded articles made of soft materials such as rubber and soft synthetic resins, A resistive plate having an appropriate extent in a direction substantially orthogonal to the axial direction of the embedded bolt is integrally or integrally formed, and the entire peripheral edge of the resistive plate or a part thereof is provided with a convexly formed part, and the convexly formed convexly formed part. The extending part continuous with the part forms a hanging part extending in the protruding direction of the embedded bolt, and the embedded bolt base including the resistance plate is insert-molded into a part of the molded article. Embedded part structure of embedded bolt in soft material.