JPH07174123A - Insert screw - Google Patents

Abstract

PURPOSE:To provide an insert screw not influencing upon recycling of a part even in the case when fastening by the insert screw is carried out. CONSTITUTION:A tapping screw 2 is formed on the outer peripheral surface of a hollow cylindrical part constituting an insert screw 1 and a female screw 3 is formed on the inner peripheral surface. Additionally, a cross recess 5 to engage with a plus driver is formed on a flat part 4 of the insert screw 1. At the time of fastening two different resin articles, an insert screw is screwed on one of the resin article, and by screwing a screw in the female screw 3 of the insert screw 1, the resin articles are fastened on each other. The plus driver is engaged with the cross recess 5 of the insert screw 1 and this driver is turned in the removing direction to remove the insert screw 1 from a resin article 6 after removing the screw and separating the resin articles from each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert screw used for fastening articles to each other.

[0002]

2. Description of the Related Art In recent years, it has been desired to supply products that can be easily recycled from the viewpoint of environmental protection and resource saving. In response to this, even in product design, the number of springs is reduced, caulking of dissimilar materials, elimination of adhesion, elimination of decal attachment, etc., making it easy to disassemble and designing materials with high recyclability. . As a method of fastening other articles to the resin material, there are methods of fastening using adhesive, caulking, tapping screws, etc., for example, parts that are repeatedly removed by a serviceman, such as an exterior cover of a copying machine, As shown in FIG. 1, a method of embedding an insert female screw in a resin material has been used at a fastening portion requiring strength and mounting accuracy.

[0003]

Even with respect to this insert female screw, it is not easy to remove the insert female screw from the member to be inserted, and this has been an obstacle to the separate collection of each material, making it difficult to reuse the parts. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide an insert screw that does not affect the reuse of parts even when the insert female screw is used for fastening.

[0004]

According to the insert screw of claim 1, in the insert screw in which a threaded portion is formed on each of the outer peripheral surface and the inner peripheral surface of the hollow cylindrical object, the upper surface or the lower surface of the cylindrical object is formed. A cross hole for a plus driver is formed on at least one of the flat portions, and the insert screw according to claim 2 is formed on each of the outer peripheral surface and the inner peripheral surface of the hollow cylindrical body. This is characterized in that the thread cutting directions of the screw parts are opposite to each other.

[0005]

Operation: When disassembling parts using insert screws, insert the plus screw into the cross hole formed in the insert screw.
Rotate the bar to engage and remove the insert screw from the part.

[0006]

FIG. 2 is a sectional view of an insert screw showing an embodiment of the present invention, and FIG. 3 is a sectional view showing a state in which two articles are fastened. In FIG. 2, a tapping screw 2 is formed on the outer peripheral surface of the hollow cylindrical component forming the insert screw 1. A female screw 3 is formed on the inner peripheral surface thereof. A cross hole 5 that engages with a Phillips screwdriver (not shown) is formed in the flat surface portion 4 of the insert screw 1. In FIG. 3, when the resin article 6 and the resin article 7 are fastened, the insert screw 1 is attached to the resin article 6.
Are screwed together, and the screw 8 is inserted into the female screw 3 of the insert screw 1.
The resinous article 6 and the resinous article 7 are fastened by being screwed together.

In order to remove the insert screw 1 from the resin article 6 after removing the screw 8 and separating the resin article 6 and the resin article 7, the cross hole 5 of the insert screw 1 is used.
The driver may be removed and rotated in the direction in which the plus driver is engaged with. According to this embodiment, since the insert screw can be removed by the Phillips screwdriver, recyclability is improved.

FIGS. 4, 5 and 6 show another embodiment of the present invention, and FIGS. 4 and 5 show the same insert screw. Further, FIG. 6 shows a state in which two resin articles are fastened by using the insert screws shown in FIGS. 4 and 5. 4 and 5, a tapping screw 10 is formed on the outer peripheral surface of the hollow cylindrical component forming the insert screw 9, and a female screw 11 is formed on the inner peripheral surface thereof. In addition, the stopper 12 is formed with a cross hole 13 that engages with a plus driver. In this embodiment, the tapping screw 10 and the female screw 11 are threaded in the opposite directions. That is, if the tapping screw 10 is a right screw, the female screw 11 is a left screw, and if the tapping screw 10 is a left screw, the female screw 11 is a right screw.

In FIG. 8, when the resin article 14 and the resin article 15 are fastened, an insert screw 9 is screwed into the resin article 14, and the screw 15 is attached to the female thread 11 of the insert screw 9. The resinous article 14 and the resinous article 15 are fastened by screwing. At the time of fastening with the screw 15, since the tapping screw 10 and the female screw 11 are threaded in the opposite directions, when the screw 15 is attached, torque is applied to the tapping screw 10 of the insert screw 9 in the tightening direction. The insert screw 9 can be fastened without loosening from the resin article 14. When the resin article 14 and the resin article 15 are separated, a Phillips screwdriver is engaged with the cross hole 13 of the insert screw 9 and the insert screw 9 is rotated in the removing direction to insert the insert screw 9. At the same time that the male screw 9 is removed from the resinous article 14, the tapping screw 10 and the female screw 11 are threaded in opposite directions, so that the screwing of the insert screw 9 and the screw 15 is released. Therefore, the worker can release the fastening of the resinous article with a single screwdriver operation.

In FIGS. 4, 5 and 6, the stopper-12 is used.
As shown in FIG. 7, a step portion 17 is provided in a part of an engaging portion of the resin article 16 with which the insert screw is screwed, so that the insert screw stopper is provided. Is unnecessary.

According to the invention of claim 1, the inserter
It is easy to remove the screws and reuse the parts. According to the second aspect of the present invention, the fastening of the article to be fastened and the removal of the insert screw can be performed by a single screwdriver work, thus improving workability.

[Brief description of drawings]

FIG. 1 is a perspective view showing a conventional insert screw.

FIG. 2 is a perspective view showing an insert screw of this embodiment.

FIG. 3 is a sectional view showing a fastening state of the present embodiment.

FIG. 4 is a perspective view showing an insert screw of this embodiment.

FIG. 5 is a perspective view showing an insert screw of this embodiment.

FIG. 6 is a sectional view showing a fastening state of the present embodiment.

FIG. 7 is a cross-sectional view showing a resin article of this example.

[Explanation of symbols]

 1 insert screw 2 tapping screw 3 female screw 5 cross hole 9 insert screw 10 tapping screw 11 female screw 12 stopper

Claims (2)

[Claims] 1. An insert screw having a threaded portion formed on each of an outer peripheral surface and an inner peripheral surface of a hollow cylindrical object, wherein at least one of a flat surface portion of an upper surface or a lower surface of the cylindrical object is provided.
An insert screw characterized by forming a cross hole for a Phillips screwdriver. 2. The insert screw according to claim 1, wherein the threaded portions formed on each of the outer peripheral surface and the inner peripheral surface of the hollow cylindrical member are threaded in opposite directions. .