JP2573629Y2 - Screw parts - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw component .

[0002]

2. Description of the Related Art In all industrial fields including the machine industry, a nut having a female thread portion and a bolt having a male thread portion to be screwed with the female thread portion of the nut are formed. Screw components are widely used as basic elements. In particular, in manufacturing factories for industrial machinery, etc., since a large variety of screw parts are used in large quantities, in order to improve work efficiency, use an automatic tightening machine or the like to attach and tighten these screw parts. Has been streamlined.

FIG. 8 is a plan view of a conventional example of a nut used in this case, FIG. 9 is a bottom view of the nut, and FIG.
As shown in FIG. 10 which shows the -IX line view, a disc-shaped flange 42 is provided on the bearing surface of a hexagonal nut 41 with a flange (hereinafter simply referred to as a nut 41).
The external shape of the female screw portion 43 is formed in a regular hexagonal column, and a chamfered portion 44 is formed on the top surface side and the seat surface side of the screw hole. On the top surface side of the nut 41, caulking portions 45 are formed at regular intervals in the circumferential direction so as to protrude toward the axis, and this caulking portion 45 is detented when tightened to a male screw. It is designed to function as.

Further, as shown in FIG. 11, which shows a side view of a conventional bolt used in the above case, one end of a columnar stud 51 (hereinafter simply referred to as a bolt 51). A threading portion 52 for implantation is formed in the portion, and a threading portion 53 for a nut is formed in the other end. A cylindrical portion 54 for attaching a mounting plate or the like is provided between the implantation screw portion 52 and the nut screw portion 53,
A chamfered portion 55 is formed at an end of the implantation screw portion 52. And, in the screw tip of the screw part 53 for the nut,
A conical portion 56 is provided to facilitate fitting of a female screw, a mounting plate, or the like.

Accordingly, when these screw parts are mounted, as shown in FIG. 6 showing a longitudinal section in a state where these screw parts are mounted, the threading portion 52 of the bolt 51 is screwed into the screw hole of the substrate 31. Then, the mounting plate 32 and the mounting plate 33 each having a hole corresponding to the outer diameter of the bolt 51 are inserted from the conical portion 56 and fitted into the columnar portion 54. Then, the nut 41 is inserted from the conical portion 56 and tightened to the nut screw portion 53 to fix the mounting plate 32 and the mounting plate 33 to the substrate 31.

[0006]

[Problem to be Solved by the Invention] At this time, the nut 41
7 does not fit into the nut screw portion 53 of the bolt 51 as specified, and is tightened in a state where the axis of the nut 41 does not coincide with the axis of the bolt 51, as shown in FIG. The nut 41 is connected to the bolt 5
The axis is inclined with respect to 1 and screwed. Therefore, a uniform load is not applied to the flank, resulting in an eccentric load, and the guaranteed load of these screw components cannot be maintained, so that the quality of the final product cannot be satisfied.

In view of the above, the present invention provides a threaded part capable of maintaining a guaranteed load by making the load applied to the flank uniform by always tightening the nut so that the axis of the nut coincides with the axis of the bolt. It was aimed at .

[0008]

[0009]

[Means for Solving the Problems ] To solve the above-mentioned problems.
For this, the threaded component according to the present invention is a threaded component comprising a nut having an internal thread portion, and a bolt having an external thread portion to be screwed with the internal thread portion of the nut, The nut has a round hole-shaped external thread guide portion having an inner peripheral surface corresponding to the diameter of the thread of the external thread at one end of the screw hole, and a protruding portion provided at the other end of the screw hole, and a center of the screw hole. And a caulking portion in which the distance from the thread to the tip is set shorter than the diameter of the root of the male screw, wherein the bolt is provided coaxially with the male thread at the tip of the male thread and has a screw hole. A cylindrical female screw guide corresponding to the distance from the center to the tip of the caulked portion and longer than the threaded length of the nut, and a conical portion provided at the tip of the female screw guide , Nut loaded into the female thread guide of the bolt
When the male screw guide portion of the nut is
And the nut
The caulking portion is the peripheral surface of the female screw guide portion of the bolt
And the axis of the nut is aligned with the axis of the bolt.
It is characterized by matching.

[0010]

[0011]

According to the screw part of the action present invention, the conical portion of the bolt, together with the position of the male thread guide portion of the nut is corrected, the external thread guide portion of the nut bolts through the internal thread guide portion of the bolt The screw is guided to the tip side, and the caulked portion of the nut is guided to the female screw guide of the bolt. As a result, the male screw guide of the nut is fitted to the distal end of the screw of the bolt, and the crimped portion of the nut corresponds to the female screw guide of the bolt. As a result, the inclination of the nut is corrected, and the axis of the nut becomes Matches the axis of the bolt.

[0012]

FIG. 2 shows a plan view of a hexagonal nut with a flange, which is an embodiment of a nut constituting a screw part according to the present invention.
As shown in FIG. 3 showing its bottom surface and FIG. 4 showing its IV-IV line, the hexagonal nut 11 with flange (hereinafter simply referred to as nut 11) has a seating surface. ,
A disk-shaped flange 12 is provided, and the external shape of the female screw portion 13 is formed as a regular hexagonal column. In a screw hole on the bearing surface side of the nut 11, a round hole-shaped screw guide portion 16 whose inner peripheral surface corresponds to the diameter of the thread of the male screw is formed. And
On the top side of the screw hole and both ends of the male screw guide 16,
A chamfer 14 is formed. On the other hand, on the top surface side of the nut 11, caulking portions 15 are formed at regular intervals in the circumferential direction so as to protrude toward the axis, and the caulking portions 15
It is designed to function as a detent when tightened to a male screw.

Further, as shown in FIG. 5 which shows a side view of a stud which is one embodiment of the bolt constituting the screw component according to the present invention, a columnar stud 21 (hereinafter simply referred to as a stud). At one end, an implanting screw portion 22 is formed, and at the other end, a nut screwing portion 2 is formed.
3 are formed. A cylindrical portion 24 formed in a tapered shape is provided between the implant screw portion 22 and the nut screw portion 23, and both ends of the implant screw portion 22 and the nut screw portion 23 are chamfered. A part 25 is formed.
The thread of the nut screw portion 23 has a cylindrical female screw corresponding to the distance from the center of the screw hole of the nut 11 to the tip of the caulked portion 15 and longer than the screw portion length of the nut 11. A guide 27 is provided. A conical portion 26 is provided at the distal end of the female screw guide portion 27 to facilitate fitting of a female screw, a mounting plate, or the like.

Therefore, when these screw parts are mounted, as shown in FIG. 1, which shows a longitudinal section in a state where these screw parts are mounted, the screwing portion 22 for the bolt 21 is screwed into the screw hole of the substrate 31. Then, a mounting plate 32 and a mounting plate 33 each having a hole corresponding to the outer shape of the bolt 21 are inserted from the conical portion 25 and fitted into the cylindrical portion 24. Then, the nut 11 is inserted from the conical portion 25 and fastened to the nut screw portion 23 to fix the mounting plate 32 and the mounting plate 33 to the substrate 31.

Here, the conical portion of the bolt 21 is
The position of the male screw guide 16 is corrected and the nut 1
One male screw guide 16 is a female screw guide 2 of the bolt 21.
7, is guided to the distal end side of the nut screw portion 23, and the caulked portion 15 of the nut 11 is
7, the male screw guide 16 of the nut 11 and the distal end side of the nut screw 23 of the bolt 21 are fitted, and the caulked portion 15 of the nut 11 and the female screw guide 27 of the bolt 21 are fitted.
Therefore, the axis of the nut 11 is tightened according to the standard while being aligned with the axis of the bolt 21.

In this embodiment, the hexagonal nut 11 with flange and the stud 21 are used. However, the present invention is not limited to this, and the same effects can be obtained with nuts and bolts. Further, in this embodiment, the caulking portion 14 is
However, the present invention is not limited to this, and the same effect can be obtained as long as the number and shape are appropriate according to the material and size of the bolt and nut, the tightening force, and the like.

[0017]

[0018]

[Effect of the Invention] In the screw part according to the present invention , the nut thread guide portion is fitted to the tip side of the bolt thread portion, and the nut caulked portion corresponds to the bolt female thread guide portion. Are tightened so as to match the axis of the external thread. Therefore, the load applied to the flank becomes uniform,
Since the guaranteed load of these screw parts is maintained, it is possible to prevent the quality of the final product from deteriorating.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a mounting state of an embodiment of a screw part according to the present invention .

FIG. 2 is a plan view of one embodiment of a nut constituting the screw component according to the present invention;

FIG. 3 is a bottom view thereof.

FIG. 4 is a view taken along the line IV-IV.

FIG. 5 is a side view of one embodiment of a bolt constituting a screw component according to the present invention.

FIG. 6 is a longitudinal sectional view showing a state where a conventional screw component is attached.

FIG. 7 is a vertical cross-sectional view of a state where the axis is displaced and attached.

FIG. 8 is a plan view of a conventional nut.

FIG. 9 is a bottom view thereof.

FIG. 10 is a view taken on line XX of FIG.

FIG. 11 is a side view of a conventional bolt.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Hex nut with flange 12 Flange 13 Female thread part 14 Chamfer part 15 Caulking part 16 Male screw guide part 21 Stud bolt 22 Stud screw part 23 Nut screw part 24 Column part 25 Chamfer part 26 Conical part 27 Female screw guide part 31 Substrate 32 Mounting plate 33 Mounting plate

Claims (1)

(57) [Scope of request for utility model registration] A nut having a female thread formed therein;
A male threaded part that is screwed with the female thread
A screw part composed of a nut and the nut
The inner peripheral surface at one end of the thread hole corresponds to the diameter of the thread of the external thread
A round-hole-shaped male screw guide is provided at the other end of the screw hole.
And the distance from the center of the screw hole to the tip
With a caulking portion set shorter than the diameter of the thread root
The bolt is coaxial with the male thread at the tip of the male thread.
And the tip of the caulked portion from the center of the screw hole
It corresponds to the distance to the end and the thread length of the nut
A cylindrical female screw guide that is longer than
A conical part provided at the tip of the part, wherein the nut is
When the bolt is loaded into the female screw guide,
The male screw guide of the bolt is located at the tip of the screw of the bolt.
The crimped part of the nut is
The bolt comes into contact with the peripheral surface of the female thread guide,
Characterized in that the axis of the bolt coincides with the axis of the bolt.
And screw parts.