JP2003343533A - Screw member for part mounting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a screw member in which a screw and a coil spring are combined in a simple configuration. <P>SOLUTION: In the screw member, a part 30 is mounted in a work 20 with the coil spring 12. The locking part with a diameter slightly larger than the leg diameter is formed on the head side, wherein one end of the coil spring 12 is locked thereto. The male screw 3 screwed into a female screw hole 21 of the work 20 is formed on the tip side of a leg 4. The part 30 is thrust to be mounted on the work 20 with the coil spring 12. In the mounting work, the winding of the coil spring around the screw is not required at each work for mounting parts in the work, which eliminates the combining work of the coil springs and screws. Moreover, reduction in work hours and working cost is materialized. Steady work is secured by preventing an occurrence of forgetting about winding the coil spring around the leg of the screw and the coil spring from dropping off from the leg during execution of work. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component mounting screw member capable of holding a component mounted on a work in a direction always orthogonal to the center line of the screw.

[0002]

2. Description of the Related Art Generally, when electronic parts or precision parts are mounted on a mounting portion of a work piece having a pillar shape, it is necessary to give some flexibility to the work piece so as not to firmly fix them. Is being done. As shown in FIG. 4, the mounting method is usually a female screw hole 12 formed in the center of a pillar-shaped work 120.
Coil spring 1 so that one end abuts on the seat surface 106 of the head 102 with the leg 104 of the screw 101 that can be screwed into
12 is wound every time when the component 130 is attached, the male screw portion 103 is screwed into the female screw hole 121 in this state, and the component 130 is pressed by the coil spring 112. In this work, the coil spring is wound around the leg portion of the screw each time by an operator, or the coil springs are automatically combined and screwed in at the time of screw tightening in an automatic screw tightener.

[0003]

However, it is always necessary for the operator to wind the coil spring around the leg portion of the screw and screw the male screw portion of the screw every time the work for attaching the component to the work is performed as described above. Each time the work is performed, the screws and the coil springs must be combined to attach the parts, which requires a lot of work time and increases the work cost. Further, there is a case where the coil spring is forgotten to be wound around the leg portion of the screw, or the coil spring may fall off the leg portion during the work. Furthermore, when the screw parts are made smaller, a great deal of labor is required for the combination of the screw parts and the burden on the operator is also increased. Moreover, the number of parts is increasing, and even if this work is automated by using an automatic screw tightening machine, there still remains a problem that this problem cannot be eliminated.

An object of the present invention is to solve the above problems and to obtain a screw member in which a screw and a coil spring are combined with a simple structure.

[0005]

SUMMARY OF THE INVENTION It is an object of the invention to provide a screw 1
Work piece 2 with the coil spring 12 wound around the leg part 4
In the screw member for attaching the component 30 to 0, a locking portion having a diameter slightly larger than the leg diameter is formed on the head side of the leg portion 4, and one end of the coil spring 12 is locked to this locking portion. A male screw portion 3 that is screwed into a female screw hole 21 formed in the work 20 is formed on the tip end side of the leg portion 4. By screwing the male screw portion 3, the component 30 is attached to the work 20 by the coil spring 12. This is accomplished by providing a component mounting screw member adapted to be pressed and mounted.

Further, for this purpose, in the above-mentioned structure, the engaging portion is the annular ring 11 protruding to the outer periphery of the leg portion 4, or the engaging portion is formed on the outer periphery of the leg portion 4 at a predetermined interval. Even with a component mounting screw member that is a protrusion, the object can be sufficiently achieved. Moreover, by making the coil spring 12 have a color different from that of the screw 1, the presence or absence of the coil spring 12 can be visually confirmed.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIG.
It will be described with reference to FIG. In FIGS. 1 and 2, 1
Is a screw including a head portion 2 and a leg portion 4 which is integrated with the head portion 2 and has a male screw portion 3 having a thread formed around the tip end side. The head 2 of the screw 1 is formed with a drive hole 5 in the shape of a cruciform conical groove which is engaged with a driver bit (not shown) on the center line of the leg 4. The drive hole 5 of the head portion 2 has a cross-shaped conical groove shape, but is not particularly limited thereto, and may have, for example, a square shape, a hexagonal shape, or another groove or hole shape, and is generally popular. The shape is not limited to this.

On the other hand, from the seat surface 6 of the head portion 2 to the male screw portion 3
A stepless shaped unscrewed portion 10 is formed over the entire length, and an annular ring 11 constituting a locking portion having a cross-sectional shape with a slightly larger diameter on the head side of the unscrewed portion 10 is formed. Are formed. Further, instead of the annular ring 11, this locking portion may be a projection (not shown) formed on the outer periphery of the leg portion 4 at a predetermined interval. Further, a coil spring 12 is wound around the leg portion 4, one end of the coil spring 12 abuts on the head seat surface 6 of the screw 1, and one end of the coil spring 12 is attached to the locking portion. It is locked. As a result, the coil spring 12 does not fall off the leg portion 4 of the screw 1.

Further, the male screw portion 3 on the tip side of the leg portion 4 is configured to be screwed into a female screw hole 21 formed at the center of a columnar work 20, as shown in FIG. By screwing this in, the end of the coil spring 12 comes into contact with the component 30, and the component 30 is pressed and attached to the work 20. Moreover, the coil spring 12 is colored so as to have a color different from that of the screw 1 around which the coil spring 12 is wound.
It becomes possible to easily visually confirm the presence or absence of 2.

As described above, the screw member formed by combining the coil spring 12 with the leg portion 4 of the screw 1 is combined with the center of the female screw hole 21 of the work 20 and the mounting hole 3 of the component 30.
After making the center of the screw 1 coincide with the center of the screw 1, the male screw portion 3 of the screw 1 is screwed into the female screw hole 21. As a result, the component 30 is pressed by the coil spring 12, and the work 20
Attached to. On the other hand, if the screw 1 is continuously screwed, the pressing force gradually increases due to the screwing amount, and the component 3
The attachment of 0 to the work 20 becomes strong. As a result, the pressing force of the component 30 on the work 20 can be adjusted, the component 30 always comes into close contact with the mounting surface of the work 20, and the component 30 can be tilted when it receives some force. On the contrary, when this force is removed, the original state can be immediately restored.

[0011]

As is apparent from the above-described embodiments, the present invention provides a screw member for attaching the component 30 to the work 20 by the coil spring 12 wound around the leg portion 4 of the screw 1 on the head side. A locking portion having a diameter slightly larger than the diameter of the leg portion is formed, and one end of the coil spring 12 is locked to this locking portion, while the distal end side of the leg portion 4 is screwed into the female screw hole 21 of the work 20. Is a component mounting screw member in which the male screw portion 3 is formed and the coil spring 12 presses and mounts the component 30 on the work 20.

Therefore, it is not necessary to wind the coil spring around the leg portion of the screw each time the work of attaching the component to the work is performed, and it is not necessary to attach the component while assembling each time. Further, it leads to reduction of working time and working cost. Further, it is possible to obtain stable work without forgetting to wind the coil spring around the leg of the screw or dropping the coil spring from the leg during the work. Moreover, the number of parts is reduced, and this work can be automated by using an automatic screw tightener.

In addition, since the locking portions are the annular ring 11 protruding on the outer periphery of the leg portion 4 and the projections formed on the outer periphery of the leg portion 4 at a predetermined interval, these locking portions are formed at the same time when the screw is formed. Can be molded, which leads to a reduction in processing cost. On the other hand, by coloring the coil spring with a color different from that of the screw, it is possible to easily visually determine whether the coil spring is wound around the screw and obtain a unique effect such as improving the tightening quality. .

[Brief description of drawings]

FIG. 1 is a front view of a screw member showing an embodiment of the present invention.

FIG. 2 is a bottom view of the screw member shown in FIG.

FIG. 3 is a cross-sectional front view showing a component mounting state according to the present invention.

FIG. 4 is a sectional front view showing a conventional example of the present invention.

[Explanation of symbols]

1 screw parts 2 heads 3 Male thread 4 legs 5 drive hole 6 seat 10 Screwless part 11 annular ring 12 coil spring 20 work 21 Female screw hole 30 parts 31 mounting holes

Claims (4)

[Claims] 1. A screw member for attaching a component (30) to a work (20) with a coil spring (12) wound around a leg portion (4) of a screw, wherein the head portion side of the leg portion is slightly smaller than the leg diameter. A large-diameter locking part is formed on this, and one end of the coil spring (12) is locked to this locking part, while the tip end side of the leg is screwed into a female screw hole (21) formed in the work. Forming a male screw part (3)
A component mounting screw member, characterized in that a coil spring presses a component onto a workpiece to mount the component by screwing the male screw portion. 2. The component mounting screw member according to claim 1, wherein the locking portion is an annular ring (11) protruding from the outer periphery of the leg portion. 3. The component mounting screw member according to claim 1, wherein the locking portion is a protrusion formed on the outer periphery of the leg portion at a predetermined interval. 4. The component mounting screw member according to claim 1, wherein the coil spring has a color different from that of the screw.