JPH0960629A - Screw stopping mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screw stopping mechanism whose fitting is comparatively simple and which can shorten a construction time. SOLUTION: A screw stopping mechanism 10 possesses a pipelike nut member 11 on whose inner surface a female screw 15 is formed; and a bolt member 14 which is equipped with a head part 16 on a base end side and at which a male screw part 17 to be screwed into the female screw 15 is formed, and cutting-in 18 is put into the male screw part 17 from the tip, and at the same time an insertion hole 12 is provided at the center of the bolt member 14, and a fixation pin 13 is made insertable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screwing mechanism having a nut member and a bolt member used when assembling a shelf plate or a storage box.

[0002]

2. Description of the Related Art Conventionally, in the case of assembling a shelf or a storage box, a tubular nut member and a bolt with a head screwed into the nut member are used, and a prepared hole is formed in a predetermined portion of one panel to be joined. The nut member is opened and inserted, and then a headed bolt is fitted into a mounting hole formed in a predetermined portion of the other panel to be joined next and screwed into the nut member for assembly.

[0003]

However, in the bolt tightening work, it is necessary to rotate the headed bolt to attach it to the nut member, and if there are many parts to be screwed, it takes a very long time to assemble. There was a problem. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a screwing mechanism that is relatively easy to install and can reduce the construction time.

[0004]

A method according to the above-mentioned object.
In the screwing mechanism described above, a tubular nut member having an internal thread formed on an inner surface thereof, and a bolt member having a head portion at a base end side and having a male threaded portion to be screwed into the female thread is formed. A notch is made from the tip of the male screw portion, and an insertion hole is provided in the center of the bolt member so that a fixing pin can be inserted.

[0005]

In the screwing mechanism according to the first aspect of the present invention, the tubular nut member is previously embedded in the panel to which the nut is attached.
Insert the bolt member with the insertion hole formed in the mounting hole of the panel to be mounted, but in this case, since the male screw portion of this bolt member has a notch formed from the tip, hit it with a hammer etc. The diameter of the male screw part is reduced to enter the tubular nut member. Next, when the fixing pin is inserted into the insertion hole of the bolt member, the male screw portion of the bolt member, which has been reduced in diameter and inserted, expands, and the male screw portion is screwed into the female screw and cannot be easily removed. When removing the bolt member, it can be removed as a normal screw by turning the head of the bolt member.

[0006]

Therefore, the screwing mechanism according to the first aspect does not require a screwing operation, so that the construction time can be shortened. Furthermore, when there are many screwed portions, the assembly work can be performed very efficiently.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to the attached drawings, an embodiment in which the present invention is embodied will be described to provide an understanding of the present invention. 1 is a partially cutaway sectional view of a screwing mechanism according to an embodiment of the present invention, and FIG. 2 is FIG.
3 is a sectional view taken along the line AA in FIG. 3, FIG. 3 is an explanatory view of a usage state of the screw fastening mechanism, and FIG. 4 is a partially cutaway sectional view of a screw fastening mechanism according to another embodiment.

As shown in FIGS. 1 and 2, a screwing mechanism 10 according to an embodiment of the present invention is made of iron, stainless steel, brass, metal such as aluminum, or hard plastic or the like. It has a nut member 11 and a bolt member 14 having a fixing pin 13 mounted in the insertion hole 12. Hereinafter, these will be described.

The tubular nut member 11 has a female screw 15 formed inside the pipe. In this embodiment, the outer side is cylindrical and straight, but is appropriately provided with irregularities and once It is preferable that it does not come off after it is mounted in the prepared hole.

The bolt member 14 is provided with a head portion 16 having an enlarged diameter on the base end side, and from the head portion 16 on the front side, the male screw portion 1 is provided.
7, and the insertion hole 12 is formed with the axial center aligned. The inner diameter of the insertion hole 12 is about 1/2 to 2/3 of the diameter of the male screw portion 17 in the male screw portion 17, but is 1/2 of the inner diameter of the insertion hole 12 in the head portion 16.
The diameter is reduced to about 2 to 2/3. And the bolt member 1
A cut 18 is formed in the male screw portion 17 of No. 4 so that the male screw portion 17 can be reduced in diameter. The width W of the notch 18 is preferably about 1/2 to 1/4 of the diameter of the male screw portion 17.

A fixing pin 13 is mounted in the insertion hole 12, and the fixing pin 13 has a pin body 19 having a diameter smaller than the expanded diameter portion of the insertion hole 12 and a shaft following the pin body 19. The length of the pin body 19 and the flange portion 21, which includes the portion 20 and the flange portion 21, is approximately the same as the length of the bolt member 14.

Therefore, using this screwing mechanism 10, for example, as shown in FIG. 3, a first panel 22 and a second panel 22 are provided.
When attempting to join the panel 23 of the tubular nut member 1 to each other, a prepared hole is formed at a predetermined position of the first panel 22.
1 is tapped, then the bolt member 14 is inserted into the second panel 23 in which a pilot hole is formed in a predetermined position in advance, and the first panel 22 and the second panel 23 are joined to each other, and the head of the bolt member 14 is joined. The portion 16 is tapped to insert the male screw portion 17 of the bolt member 14 into the tubular nut member 11. in this case,
Since the notch 18 is formed in the male screw portion 17,
It smoothly enters the tubular nut member 11. Next, when the flange portion 21 of the fixing pin 13 is tapped, the pin body 19 enters the inner side of the bolt member 14, whereby the male screw portion 17 is screwed into the female screw 15, and the bolt member 14 is tubular nut member 11. Fixed to. The bolt member 14 is removed by rotating the head 16,
In this case, the tool is easily applied by setting the cross-sectional shape of the head 16 to, for example, a hexagon, which is an example of a polygon.

FIG. 4 shows a screwing mechanism 25 according to another embodiment, in which the insertion hole 27 formed in the bolt member 26 is straight and the fixing pin 28 fitted therein is straight. And chamfer 2 at the tip
9 has been made. This facilitates tapping of the bolt member 26 and insertion of the fixing pin 28. Since other parts are the same as those in the above-described embodiment, the same numbers are given and detailed description thereof is omitted.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view of a screwing mechanism according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG.

FIG. 3 is an explanatory diagram of a usage state of the screw fastening mechanism.

FIG. 4 is a partially cutaway sectional view of a screwing mechanism according to another embodiment.

[Explanation of symbols]

10 Screwing Mechanism 11 Cylindrical Nut Member 12 Insertion Hole 13 Fixing Pin 14 Bolt Member 15 Female Screw 16 Head 17 Male Screw Part 18 Notch 19 Pin Body 20 Shaft Part 21 Flange Part 22 First Panel 23 Second Panel 25 Screwing Mechanism 26 Bolt member 27 Insertion hole 28 Fixing pin 29 Chamfer

Claims (1)

[Claims] 1. A screw fastening mechanism comprising: a cylindrical nut member having an internal thread formed on an inner surface thereof; and a bolt member having a head portion on a proximal end side thereof and having a male screw portion formed to engage with the internal thread. A screwing mechanism characterized in that a notch is made from the tip of the male screw part, and an insertion hole is provided in the center of the bolt member so that a fixing pin can be inserted.