JPH0814236A - Spacer for nut - Google Patents

Abstract

(57) [Summary] [Purpose] Allow the nut to be easily moved to the target position of the bolt in a short time. [Structure] It has a cylindrical shape in which a plate body is rolled into an inner diameter larger than the outer diameter of the bolt 2 to be used, and has a circumferential length such that a slight gap is generated between each side edge 1c and 1c in a tightly attached state to the bolt 2. Then
A female screw corresponding to the male screw of the bolt 2 is formed on the inner surface,
A male screw corresponding to the female screw of the nut 3 to be used is formed on the outer surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is designed to be screwed onto a bolt to
The present invention relates to a spacer used with a nut that tightens two parts.

[0002]

2. Description of the Related Art A nut having a hexagonal or quadrangular outer shape and a female screw formed in a central hole is widely known.

[0003]

When the nut is used, it is fitted on the tip of the bolt and rotated to advance to the tightening position and then tightened strongly.
The forward work to the tightening position by the rotation takes time and effort, and particularly when the bolt is a long work of 2 to 3 m or when the nut tightening work is large, the weight occupying the whole work of the nut forward work. Will be remarkably large.

An object of the present invention is to enable a nut to be easily moved to a target position of a bolt in a short time.

[0005]

In order to achieve the above object, the nut spacer of the present invention has a cylindrical shape in which a plate body is rounded to an inner diameter larger than the outer diameter of a bolt to be used,
It has a peripheral length such that a slight gap is generated between each side edge in a state of being closely attached to the bolt, and a female screw corresponding to the male screw of the bolt is formed on the inner surface and corresponds to the female screw of the nut to be used. The male screw is formed on the outer surface, and a wedge portion that increases in thickness as it approaches the end may be formed at one end.

[0006]

In the nut spacer constructed as described above, after the spacer is fitted on the bolt and slid to the target position, the nut is similarly slid to the front of the target position. After that, the spacer is pressed with a finger so as to be in close contact with the bolt, and the nut is rotated and screwed there to complete the bolt tightening. In the case of a spacer having a wedge portion, turning the nut to the extreme causes the front end of the nut to act on the wedge portion, and the bolt is strongly tightened by the spacer.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the nut spacer of the present invention will be described with reference to FIGS.

The nut spacer 1 is formed by rolling a metal or plastic plate into a cylindrical shape as shown in FIG. Therefore, it has two side edges 1c and 1c. The spacer 1 has a uniform thickness, or as shown in FIG. 4, a wedge portion 1d is formed at one end, the thickness of which increases as it approaches the end. Then, a female screw 1a is formed on the inner surface of the spacer 1, and a male screw 1b is formed on the outer surface thereof.

The spacer 1 is fitted into a bolt 2 at the time of use and a nut 3 is screwed into the spacer 2, but a female screw 1a.
Can be screwed onto a male screw formed on the bolt 2 to be used, and the male screw 1b can be screwed onto a female screw formed on the nut 3 to be used. I will get it.

The inner diameter of the spacer 1 must be slightly larger than the outer diameter of the bolt 2 so that the spacer 1 can be easily fitted. Further, the size of the circumference of the spacer 1 is such that a slight gap is generated between the side edges 1c in a state in which the spacer 1 is fitted into the bolt 2 and pressed with the fingers to be in close contact with the bolt 2. Then, it is necessary that the side edges 1c and 1c be soft enough to be easily narrowed by pressing them with a finger. Furthermore, the length of the spacer 1 may be slightly larger than the thickness of the nut 3 to be used.

The nut 3 used here has an inner diameter which is necessary and sufficient for screwing into the spacer 1 which is closely attached to the bolt 2, and which is of course the inner diameter of the bolt 2. It is sufficiently larger than the outer diameter. Therefore,
It can be freely slid to any position with the bolt 2 fitted.

To actually use the nut spacer 1 thus constructed, as shown in FIG. 3 or 4,
First, the bolt 2 inserted through the holes of the members 4 and 5 to be fixed.
Fit the spacer 1 on and slide it to the target position.
At this time, if the spacer 1 has the wedge portion 1d, it is slid with the wedge portion 1d side facing forward. Then, the nut 3 is fitted in the same manner and slid to the front of the target position. Then, the spacer 1 is pressed with a finger to be closely attached to the bolt 2, and the nut 3 is rotated and screwed therein. When the spacer 1 has the wedge portion 1d, the nut 3 is turned to the extreme so that the front end of the nut 3 acts on the wedge portion 1d, the bolt 2 is strongly tightened by the spacer 1, and then the spacer 1 and the nut 3 rotate. Will not do.

[0013]

Since the present invention is configured as described above, it has the following effects.

That is, no matter how long the bolt is, the spacer and the nut can be instantly moved to the necessary places, and the bolt tightening work can be easily performed in a short time with a little labor. Moreover, the engagement strength is comparable to that of conventional bolts and nuts. Moreover, since the structure is extremely simple, the manufacturing cost can be kept low.

When the spacer has a wedge portion, it is possible to prevent the nut after tightening from rotating even if the processing accuracy is somewhat poor.

[Brief description of drawings]

FIG. 1 is a perspective view of a nut spacer of the present invention.

FIG. 2 is a perspective view showing a relationship between a bolt, a nut and a spacer of the present invention.

FIG. 3 is a cross-sectional view showing a usage mode of the nut spacer of the present invention.

FIG. 4 is a cross-sectional view showing a usage mode of another nut spacer of the present invention.

[Explanation of symbols]

 1 Nut spacer 1a Female screw 1b Male screw 1c Abutting side edge 1d Wedge 2 Bolt 3 Nut

Claims (2)

[Claims] 1. A cylindrical shape having a plate body rounded to an inner diameter larger than the outer diameter of a bolt to be used, and having a circumferential length such that a slight gap is generated between each side edge in a state of closely contacting with the bolt, A female screw corresponding to the male screw of the bolt is formed on the inner surface,
A nut spacer with external threads formed on the outer surface corresponding to the female threads of the nut to be used. 2. The nut spacer according to claim 1, further comprising a wedge portion at one end, the wedge portion having a thickness increasing toward the end.