JP2000009113A - Member with female screw and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with high drawing accuracy so as to reduce cost by composing a member with a female screw of a pipe and a nut mounted to the end of the pipe, and holding the end of the pipe by an outer collar protrusively provided at the outer peripheral surface of a nut body and bent onto the pipe side, and the nut body inserted in the pipe. SOLUTION: A member with a female screw is composed of a pipe 1 and a nut 2 with an outer collar 4. A recessed part 6 is formed at the whole periphery of the pipe insert side outer peripheral surface of a nut body 3. The nut body 3 is inserted in the pipe 1 cut in specified dimension, until abutting the outer collar 4, and a die 8 with a molding recess 9 almost coinciding with the outer diameter of the pipe 1 is press-fitted to the pipe 1 from the nut 2 side. The outer collar 4 is deformed sliding along a taper part 8a of the molding recess 9 and forcibly bent onto the pipe 1 side, and the end 7 of the pipe 1 and the outer collar 4 are pushed into the recessed part 6 by drawing so as to hold the end 7 by the outer collar 4 and the nut body 3. Precision drawing and threading are therefore dispensed with and manufacture is extremely easy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a member with a nut used as a component of a length adjusting member such as a turnbuckle or a height adjusting member such as an underfloor support of an OA floor, and an improvement of a manufacturing method thereof. About.

[0002]

2. Description of the Related Art A conventional member with a nut is shown in FIGS.
As shown in the figure, first, the end 21 of the pipe 20 is drawn to reduce its inner diameter, and then a female screw 22 is screwed on the inner peripheral surface of the small-diameter end 21 to form a member with a female thread. Was.

[0003]

However, the required diameter of the pipe 20 and the nominal diameter of the internal thread 22 are not always defined with a fixed relationship, and each time according to the demand of the consumer, The above-described drawing process is performed, and the female screw 22 is screwed on the inner periphery thereof.

[0004] If a female screw 22 is to be screwed into the narrowed portion 21, the inner diameter of the narrowed portion 21 must be accurately narrowed in accordance with the JIS standard. The problem that accuracy is required, and the drawing of the pipe end 21 is particularly difficult when the diameter reduction rate is large (in other words, despite the fact that the thick pipe 20 is used, the nominal diameter of the internal thread 22 is small). In the case of small), there is a problem that it takes a lot of time and labor for processing because it requires a plurality of steps, and recently a member with a female screw having a new structure and a method of manufacturing the same have a new structure from the viewpoint of cost competition. Was sought.

[0005]

According to a first aspect of the present invention, there is provided a member with a female thread, comprising a pipe 1 and a nut 2 attached to an end 7 of the pipe 1. ,
The end 7 of the pipe 1 is sandwiched between the outer flange 4 projecting from the outer peripheral surface of the nut body 3 and bent toward the pipe 1 and the nut body 3 inserted into the pipe 1 ". Features.

According to this, the end 7 of the pipe 1 is merely sandwiched between the outer flange 4 bent toward the pipe 1 and the nut body 3 inserted into the pipe 1. Such drawing work is not required, and the working efficiency is improved. The nut 2 may be attached to only one end of the pipe 1 or may be attached to both ends. It can be freely selected depending on the application. In addition, since the length and shape of the nut 2 or the length and shape of the pipe 1 can be freely selected, it is possible to instantaneously respond to various demands of customers. Claim 2 is an improvement of the female threaded member of claim 1, wherein at least a part of the end 7 of the pipe 1 is inserted into the recess 6 formed in the outer peripheral surface of the pipe insertion portion of the nut body 3. Is fitted ".

According to this, since at least a part of the end portion 7 of the pipe 1 is fitted in the concave portion 6, the end portion 7 is deformed into a shape as if narrowed, and the outer flange 4 is deformed.
And the nut body 3, the nut 2 is more securely fixed to the pipe 1, and the nut 2 is prevented from falling off.

A third aspect relates to a further improvement of the female threaded member according to the second aspect, wherein “a convex portion 10 is formed in the concave portion 6 or on the folded back surface of the outer flange 4, and an end portion of the pipe 1. 7 is penetrated by the convex portion 10 ".

According to this, even if the clamping force of the end 7 of the pipe 1 by the outer flange 4 and the nut main body 3 is insufficient, the force in the rotation direction is applied to the nut 2 by the bite of the projection 10. When it is added, the rotation of the nut 2 can be prevented.

A fourth aspect of the present invention relates to a basic method for manufacturing a female threaded member in which a nut 2 is attached to an end portion 7 of a pipe 1 according to the present invention. The nut body 3 was inserted into the pipe 1, and then the outer flange 4 was deformed toward the pipe 1 so that the deformed outer flange 4 and the nut body 3 sandwiched the end 7 of the pipe 1. " It is characterized by things.

According to this, the nut 2 can be fixed to the pipe 1 only by inserting the nut body 3 of the nut 2 into the pipe 1 and deforming the outer flange 4 toward the pipe 1 as in the conventional example. The need for precise drawing and threading is eliminated, making the manufacture of threaded pipes extremely simple.

A fifth aspect of the present invention is an improvement of the method for manufacturing a member with a female thread according to the fourth aspect, wherein "the concave portion 6 recessed on the outer peripheral surface of the pipe insertion portion of the nut body 3 includes At least a part of the end portion 7 is press-fitted. " Claim 6 is a further improvement of the method for manufacturing a member with a female thread according to claim 5, wherein “the inside of the recess 6 or the outside flange 4 is formed.
A convex portion 10 is formed on the folded and sandwiched surface of the pipe 1, and the convex portion 10 is made to bite into the end portion 7 of the pipe 1 ".

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. The components of the female threaded member in the present invention are the nut 2 with the outer flange 4 and the pipe 1. Examples of the pipe 1 include a rectangular pipe such as a circular section, a square or a rectangular section, and various pipes such as a hexagon. full length,
The diameter, thickness, material, or cross-sectional shape can be freely selected according to the requirements of the consumer.

FIG. 4 is an external perspective view of a first embodiment (basic type) of the nut 2. An outer flange 4 projects from the outer peripheral surface of the nut body 3, and the nut 2 A female screw 5 is screwed into a central portion of. This point is common to the whole nut 2 of the present invention. Nut body 3 and outer collar 4
The outer shape of is circular in the figure, but is not limited to this, of course.
As with the pipe 1, various shapes such as a rectangular shape such as a circular cross-section, a square shape or a rectangular shape, or a hexagonal shape can be freely selected. The outer flange 4 has a diameter larger than the outer diameter of the pipe 1 because the end 7 of the pipe 1 must be sandwiched as described later. In addition, outer tsuba 4
Is formed at one end of the nut body 3, but is not limited to this, and may be formed at the central portion of the nut body 3 or any other portion.

FIG. 5 shows a second embodiment of the present invention, in which a concave portion 6 is formed on the entire outer periphery of the nut body 3 on the side of the pipe 1 insertion side. In the illustrated embodiment, the outer flange 4 is formed along the outer flange 4, but is not limited to this, and may be formed in parallel with a plurality of strips if it can be formed at a position off the outer flange 4. . These can be said throughout except for the first embodiment of the present invention.

FIG. 6 shows a third embodiment of the present invention, in which a convex portion 10 is formed in a concave portion 6. In the case of the figure, the shape of the convex portion 10 is triangular in cross section, and the top portion is protruded so as to coincide with the axial direction of the nut 2, but is not limited to this.
It may be a simple projection or a knurl (not shown). In the case of a knurl, it may be provided on the entire outer peripheral surface of the nut body 3 on the side inserted into the pipe 1 in the embodiment of FIG.
In the following embodiments, the nut may be provided not only in the recess 6 but also on the entire outer peripheral surface of the nut body 3 on the side to be inserted into the pipe 1 as described above.

FIG. 7 shows a fourth embodiment of the present invention. Contrary to the above, a convex portion 10 is formed on the surface of the outer flange 4 on the side inserted into the pipe 1.
Are examples formed. FIG. 8 shows a fifth embodiment of the present invention, in which a ring-shaped convex portion 10 is formed on the entire outer periphery of a surface of the outer flange 4 on the side inserted into the pipe 1.

Next, a manufacturing method according to a second embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the nut body 3 is inserted into one end of the vibrator 1 cut to a predetermined size until it comes into contact with the outer flange 4. Next, a mold 8 having a molding recess 9 substantially matching the outer diameter of the pipe 1 is prepared, and the pipe 1 is pressed into the molding recess 9 from the nut 2 side.

The outer flange 4 is deformed by sliding on the tapered portion 8a of the molding recess 9, and is forcibly bent toward the pipe 1.
At this time, since the concave portion 6 is formed in the nut 2, the end 7 and the outer flange 4 of the pipe 1 corresponding to the concave portion 6 are
The end 7 of the pipe 1 is sandwiched between the outer flange 4 and the nut body 3 inserted into the pipe 1 in a state in which the end 7 is drawn inward and bent in the concave portion 6 by drawing. Will be done. At this time, if the depth of the concave portion 6 is adjusted, the outer diameter of the deformed outer flange 4 and the outer diameter of the pipe 1 become substantially equal, the step is reduced as shown in FIG. 3, and the appearance is improved.

When the nut 2 without the concave portion 6 as shown in FIG. 4 is used, the pipe 2 is thicker than the pipe 1 because there is no portion into which the folded back portion of the outer flange 4 enters unlike the above.

The same applies to the case where the nut 2 shown in FIG. 6 is used. Screw the bolt 11 into the nut 2,
In the case where the nut is hooked with the separate nut 12, the nut 2 can withstand the force in the rotation direction generated on the nut 2, and has a retaining action and a remarkable anti-rotation action.

Similarly, in the case of FIG. 7, a rotation stopping action is also provided. In this case, the protrusion 10 is provided on the folded back surface on the outer flange 4 side.

On the other hand, FIG. 8 shows that the convex portion 10 is formed on the entire outer peripheral portion of the holding surface on the bending side of the outer flange 4. The end 7 is bent at the same time as the end 7 is pressed from the outside by the projection 10, so that a stronger retaining action can be expected. The nut 2 is attached to one end 7 of the pipe 1 in this manner. If necessary, the nut 2 is fixed to the other end of the pipe 1.

Next, an example of use of the member with a female thread according to the present invention will be described. When used as a member for a buckle, the right and left nuts 2 whose screw engraving directions are opposite to each other are mounted on both sides, and are used, for example, adjacent columns (not shown), beams (not shown) and A pair of rods (not shown) are diagonally extended in a wall space formed by a floor (not shown) and screwed to left and right nuts 2 on both ends of the rod. When the female threaded member of the present invention is tightened in this state, the threaded portion of the rod is gradually screwed into the female threaded member, and the turnbuckle is gradually tightened.

When used as a support member for an OA floor or the like, a rod (not shown) mounted on an OA floor constituent member (not shown) and a leg standing on a slab (not shown). Part (not shown) is screwed into the female threaded member of the present invention,
The height of the OA floor component can be adjusted by adjusting the amount of screwing of the leg and the rod into the female threaded member.

[0026]

According to the present invention, only the end of the pipe is sandwiched between the outer flange bent toward the pipe and the nut body inserted into the pipe. Drawing work and the like are not required, and work efficiency is improved. In addition, since the length and shape of the nut or the length and shape of the pipe can be freely selected, it is possible to instantaneously respond to various demands of customers.

In addition, when the recess is formed in the nut body, when the outer flange is bent and deformed, at least a part of the end of the pipe and at least a part of the bent outer flange are fitted into the recess. Since the end portion is deformed into a shape as if the end portion is narrowed down, the end portion is sandwiched between the outer flange and the nut body, and the nut 2 is more securely fixed to the pipe, and the nut Shedding is prevented.

In the case where a convex portion is formed in the concave portion, the convex portion bites into the end of the pipe, thereby exerting an action of preventing rotation of the nut.

[Brief description of the drawings]

FIG. 1 is a sectional view of a nut with an outer flange according to the present invention before being joined to a pipe.

FIG. 2 is a cross-sectional view when the outer flange is deformed by a mold and the end of the pipe is held between the nut with the outer flange and the pipe according to the present invention.

FIG. 3 is an external front view of the member with an outer collar according to the present invention.

FIG. 4 is a perspective view of a first embodiment of an outer flanged nut according to the present invention.

FIG. 5 is a perspective view of a second embodiment of an outer flanged nut according to the present invention.

FIG. 6 is a perspective view of a nut with an outer flange according to a fourth embodiment of the present invention.

FIG. 7 is a perspective view of a nut with an outer flange according to a fifth embodiment of the present invention.

FIG. 8 is a perspective view of a nut with an outer flange according to a sixth embodiment of the present invention.

FIG. 9 is a sectional view of a pipe used in the present invention or a conventional example.

FIG. 10 is a sectional view of a conventional drawn pipe.

FIG. 11 is a cross-sectional view of a conventional example in which a drawn portion is subjected to nut processing and a pipe is processed.

[Explanation of symbols]

 1 Pipe 2 Nut 3 Nut Main Body 4 Outer Collar 5 Female Thread 6 Depression 7 End 8 Die 9 Molding Depression 10 Convex

Claims (6)

[Claims] 1. A member with a female thread comprising a pipe and a nut mounted on an end of the pipe, an outer flange protruding from an outer peripheral surface of a nut body and bending toward the pipe, A member having a female thread, wherein an end of the pipe is held between a nut body inserted into the pipe. 2. The member with an internal thread according to claim 1, wherein at least a part of an end of the pipe is fitted into a concave portion formed on an outer peripheral surface of a pipe insertion portion of the nut main body. A member with a female thread. 3. The member with a female thread according to claim 2, wherein a convex portion is formed in the concave portion or a folded holding surface of the outer flange, and the convex portion bites into an end of the pipe. A member with an internal thread. 4. A method of manufacturing a member with a female thread, wherein a nut is mounted on an end of a pipe, wherein a nut body having an outer flange protruding from an outer peripheral surface thereof is inserted into the pipe, and then the outer flange is formed. A method for manufacturing a member with a female thread, characterized in that the end of the pipe is sandwiched between the deformed outer flange and the nut body by deforming the pipe toward the pipe. 5. The method for manufacturing a member with a female thread according to claim 4, wherein at least a part of the end of the pipe is press-fitted into a recess formed on the outer peripheral surface of the pipe insertion portion of the nut main body. A method for producing a member with a female thread, characterized by the following. 6. The method for manufacturing a member with a female thread according to claim 5, wherein a convex portion is formed in the concave portion, and the convex portion is cut into an end of the pipe. Manufacturing method of a member with a female screw to perform.