JP3043953B2 - Bolt with special shape head and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bolt having a specially shaped head, such as an eyebolt, a hinge bolt, and a butterfly bolt.

[0002]

2. Description of the Related Art As shown in FIG. 4 (A), an eyebolt is a bolt having a circular ring-shaped head with a hole and a part formed with a disc-shaped part. In order to lift or draw, a bolt or the like is screwed into a machine or the like, and a wire, a rope, or the like is connected to the eye hole of the head for use.

A hinge bolt is commonly called a denden bolt, and is a bolt having a ring-shaped head with an eye hole, as shown in FIG. 4B, for example. The head hole is rotatably fitted and connected to a shaft provided on one of the two mechanical parts, and the whole is rotated to fit the bolt part into the fork of the other part, and then to the bolt part It is used for connecting and fixing both parts by tightening a screwed nut.

As shown in FIG. 4C, a wing bolt is a bolt having a butterfly-shaped head, which can be operated by manually rotating the head, and is used in various fields. I have. Such specially shaped bolts are usually
The head and the bolt are integrally formed. Butterfly bolts are sometimes manufactured by preparing a bolt having a fixed shape head, caulking a butterfly-shaped head to the bolt head, and fixing it by welding or other means that cannot be practically disassembled.

[0005] These specially shaped head bolts are:
Usually, it is manufactured in dimensions according to the standards such as JIS and is commercially available.

[0006]

However, since a wide variety of products are available today, specially shaped head bolts as described above used for these products are longer than general standard products. The fact is that there are many demands for something shorter.

[0007] Of these requirements, if the requirement is a little shorter, it is sufficient to cut a longer bolt. If the requirement is a little longer, a bolt that meets the requirement must be manufactured. Not
Such bolts are expensive to manufacture because they are manufactured off the mass production line and cannot be easily provided. Regarding the requirement of a slightly shorter one, if the bolt material is relatively difficult to cut, such as stainless steel,
It costs much and it becomes difficult to respond quickly when the number of required items increases.

Accordingly, the present invention provides a specially shaped head bolt, such as an eyebolt, a hinge bolt, or a butterfly bolt, having a required length and screw size, and a structure which can be easily and inexpensively manufactured. This is the first problem. Further, the present invention provides a method of manufacturing a bolt with a special shape head such as an eye bolt, a hinge bolt, and a butterfly bolt, and provides a method of easily and inexpensively obtaining a bolt having a required length and a screw size. This is the second task.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned first problem, the present invention has a bolt head of a predetermined special shape having a hole for press-fitting and fixing a bolt portion, and one end portion is press-fitted and fixed to the hole. Provided are a specially shaped headed bolt having a bolt portion, for example, an eyebolt, a hinge bolt, and a wing bolt.

In this type of bolt, the head and the bolt portion are interconnected and fixed in such a manner that the cross-sectional shape of the hole in the bolt head and one end of the bolt portion are circular, and the inner diameter of the bolt head hole is the bolt portion. A state in which the outer diameter of the one end is formed slightly smaller than the outer diameter of the one end, and the one end is press-fitted and fixed in the hole,
The bolt head hole is a female screw hole, and one end of the bolt portion to be press-fitted and fixed in the female screw hole has a circular cross section, and the one end portion is pressed into the female screw hole by crushing the thread of the female screw. In this state, a bolt male screw is also formed at one end of the bolt portion, and a hole in the head of the bolt is formed as a circular hole having an inner diameter smaller than the outer diameter of the male screw. May be crushed and fixed in the bolt head hole by press-fitting.

The dimensions of one or both of the one end portion and the bolt head hole are relatively roughly determined so that the operation of press-fitting the one end portion of the bolt portion into the bolt head hole can be easily performed, and the two can be fixed. In terms of certainty, the above and the connected and fixed state can be cited. In addition, when the press-fitting operation is started, the above-described connection and fixed state can be cited in that one end of the bolt is easily positioned in the bolt head hole. here
Then, the above-mentioned connection fixed state is adopted.

The hole in the bolt head may be a through hole or a bottomless hole. It is also conceivable that one end of the bolt portion press-fitted and fixed to the bolt head hole is more securely fixed to the bolt head by welding or the like.
For example, as a simple and inexpensive provision, a bolt head hole is a through hole, and a crimping fixing portion is formed by crimping processing at one end of the bolt portion press-fitted and fixed in the hole on the side opposite to the press-fit side. Are formed.

Further, in order to solve the second problem, the present invention provides a bolt having a predetermined length and a screw size in which one end portion is formed in a circular cross section having an effective diameter of a male screw of a bolt portion or an outer diameter substantially equal to the effective diameter. A bolt portion, at one end thereof, is formed into a female screw hole of a head of a predetermined special shape in which a female screw hole having a screw size corresponding to the male screw of the bolt portion is formed as a hole for press-fitting and fixing the bolt portion,
Provided is a method for manufacturing a bolt with a specially shaped head, which is fixed by press-fitting while crushing the thread of the female screw.

In this manufacturing method, the bolt portion can be provided by various methods such as cutting, but a relatively simple and inexpensive method is to provide the bolt portion with an outer diameter equal to the effective diameter of a predetermined male screw. It may be provided through a step of forming the male screw by rolling a bar having a circular cross section (usually a metal bar) having a portion that becomes one end of the bolt portion. The rod having a circular cross section may be formed to have a predetermined bolt portion length before the rolling process, or may be cut to the length after the rolling process.

After press-fitting and fixing one end of the bolt portion to the bolt head hole, the one end portion may be more securely fixed to the bolt head by welding or the like. It is conceivable that a screw hole is formed to penetrate and one end of the bolt portion is press-fitted and fixed to the female screw hole, and then the one end is caulked on the side opposite to the press-fit side to form a fixed portion.

In the bolt and the method of manufacturing the bolt according to the present invention, the material of the bolt head and the bolt portion may be any metal as long as the bolt can be manufactured and the bolt strength required for using the bolt can be obtained. However, a synthetic resin or a combination thereof may be used. Normally, both may be made of metal.

[0017]

The bolt with a special shape head according to the present invention is used in the same manner as a conventional bolt with a special shape head. The bolt according to the present invention has a bolt portion and a bolt head that can be manufactured separately, and has, for example, a bolt portion press-fitting fixing hole having a size corresponding to each of a plurality of bolt portion male screw sizes that can meet expected requirements. One or more types of bolt heads are prepared in advance, and a plurality of types of bolts having a length and a male screw size capable of meeting expected requirements are prepared in advance, or such bolts are prepared. Produced by rolling or the like and by appropriately combining such a bolt head and a bolt portion, a bolt with a specially shaped head having a required length and screw size can be easily, easily, and inexpensively provided.

Further, a bolt according to the present invention, the bolt head holes are female screw hole, to which a bolt one end a circular section rod shape to be press-fitted, the one end of the female thread Is press-fitted and fixed to the female screw hole, so that the operation of press-fitting and fixing one end of the bolt portion to the female screw hole is easy, and the bolt head and the bolt portion are securely interconnected and fixed. . Further, when the bolt head hole is a through hole, and a caulking fixing portion is formed at one end of the bolt portion press-fitted and fixed to the hole on the side opposite to the press-fitting side, the bolt is fixed by the caulking fixing portion. The head and the bolt portion are more securely and securely connected and fixed.

According to the bolt manufacturing method of the present invention,
The one end of the bolt portion formed into a circular rod-shaped cross section having the effective diameter of the bolt male screw or the outer diameter of the effective diameter is easily formed in the female screw hole of the bolt head having the screw size corresponding to the male screw. It is positioned and is press-fitted and fixed in the female screw hole while easily crushing the ridge of the female screw by a suitable press-fitting means such as hammering or pressing with a pressing means. Bolts are formed.

In the case where this manufacturing method is adopted, the male screw is formed by rolling a bolt having a circular cross section having an outer diameter equal to the effective diameter of the predetermined male screw except for one end of the bolt. When the bolt portion is provided through a process, the bolt portion can be provided simply and inexpensively. Also, when one end of the bolt portion is press-fitted and fixed to the female screw hole of the bolt portion, and then the one end portion is crimped on the side opposite to the press-fit side to form a fixed portion, the bolt portion and the bolt head are formed. The interconnection and fixing of the parts are more reliable and safe.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. 1A and 1B show an example of an eyebolt according to the present invention. FIG. 1A is a side view of a circular ring-shaped head 11 of the eyebolt 1, FIG. 1B is a side view of a bolt portion 12, and FIG. FIG. 2C is a side view of the head 11 and the bolt portion 12 in the middle of manufacturing the eyebolt, and FIG. 2D is a side view of the completed eyebolt 1.

This eyebolt 1 is manufactured by
The head 11 shown in FIG. (A) and the bolt part 1 shown in FIG.
2 are prepared separately. The bolt portion 12 is formed by rolling a circular metal rod having an outer diameter equal to the effective diameter of the male screw 121, leaving one end portion 122 thereof, to form a male screw 121 having a predetermined screw size. It is obtained by cutting.

The head 11 is made of a metal which is entirely formed in a circular ring shape. A disk-shaped portion 112 is integrally formed on a part of the circumference of the ring shape. Has a through female screw hole 111 formed therein. The female screw hole 111 has a screw size corresponding to the male screw 121, into which the male screw 121 of the bolt portion 12 can be screwed.
For example, if the male screw size is M12, the female screw hole 111
Is also M12.

As shown in FIG. 1 (C), the bolt portion 12 has a female threaded hole 111 at one end 122 having an outer diameter equal to the effective diameter of the screw (for example, the effective diameter is 10.86 mm for the screw size M12). It is easily positioned and press-fitted and fixed by appropriate means. The press-fitting is performed while crushing the threads of the female screw hole 111. Thus, the one end portion 122 is press-fitted into the female screw hole 111 and is fixed to the hole. Next, a portion 122a of the one end portion 122 that has penetrated the female screw hole 111 is caulked by an appropriate means and crushed, and as shown in FIG. The eyebolt 1 is provided with the bolt portion 12 securely and securely connected to the head portion 11 and having a predetermined length and a screw size.

FIG. 2 shows a hinge bolt 1 according to the present invention.
FIG. 4A is a side view of a circular ring-shaped head 21 of the hinge bolt 2, FIG. 4B is a side view of a bolt portion 22, and FIG. Head 21
And (D) is a side view of the completed hinge bolt 2. In manufacturing the hinge bolt 2, a head 21 shown in FIG. (A) and a bolt portion 22 shown in FIG.

The bolt portion 22 is formed by rolling a circular metal bar having a cross section having an outer diameter equal to the effective diameter of the male screw 221 except for one end 222 thereof to form a male screw 221 having a predetermined screw size. It was obtained by cutting it to the director. Head 21 is of a metal that is created in a circular ring shape, the ring through radially part of the shape circumferential female screw hole 2
11 are formed. The female screw hole 211 is the bolt 22
Is a screw size corresponding to the male screw 221 that can be screwed into the male screw 221.

As shown in FIG. 2 (C) , the bolt portion 22 is easily positioned in the female screw hole 211 at one end portion 222 having an outer diameter equal to the effective diameter of the screw, and is simply and reliably secured by appropriate means. Press-fit and fixed. This press fit is for female screw hole 2
11 while crushing the threads of the thread 11
22 is press-fitted and penetrated into the female screw hole 211 and is fixed to the hole. Next, in the one end portion 222, the female screw hole 21 is formed.
2 is crimped by appropriate means and crushed to form a fixing and retaining portion 223, as shown in FIG.
Is securely and securely connected, and a hinge bolt 2 having a predetermined length and a screw size is provided.

Next, FIG. 3 shows an example of a wing bolt according to the present invention. FIG. 3A is a side view of a butterfly-shaped head 31 of the wing bolt 3, and FIG. 32 is a side view of the head 31 and the bolt portion 32 in the middle of the manufacture of the wing bolt, and FIG. 3D is a side view of the completed wing bolt 3. In manufacturing the wing bolt 3, a head 31 shown in FIG. (A) and a bolt part 32 shown in FIG.
Are prepared separately.

The bolt portion 32 is formed by rolling a circular metal rod having an outer diameter equal to the effective diameter of the male screw 321, leaving one end 322 thereof, to form a male screw 321 having a predetermined screw size. It was obtained by cutting it to the director. The head 31 is made of a metal formed into a butterfly shape by an appropriate manufacturing method and having a through-threaded female screw hole 311 formed in the center thereof. The female screw hole 311 has a screw size corresponding to the male screw 321 to which the male screw 321 of the bolt portion 32 can be screwed.

At one end 322 having an outer diameter equal to the effective diameter of the screw, the bolt 32 is easily positioned in the female screw hole 311 as shown in FIG. Press-fit and fixed. This press fit is female screw hole 3
11 while crushing the threads of the thread,
22 is press-fitted into the female screw hole 311 and is fixed to the hole. Next, in the one end portion 322, the female screw hole 31 is formed.
3 is crushed by a suitable means by caulking and crushing, and a fixing and retaining portion 323 is formed as shown in FIG.
Are securely and securely connected and fixed, and a wing bolt 3 having a predetermined length and a screw size is provided.

In each of the bolts 1, 2, and 3 of the above embodiments, the one end portions 122, 222, and 322 of the bolt portions all penetrate the female screw holes 111, 211, and 311 and protrude to the opposite side, but do not necessarily protrude. No need. For example, in the hinge bolt 2, the one end portion 222 of the bolt portion is stopped without protruding to the ring inner space (eye hole) of the head 21, so that the shaft rod (not shown) can be inserted into the eye hole of the head 21 and can be inserted therethrough. It is also conceivable to make the rotation of the bolt about the center smooth. Also, caulking fixing parts 123, 223, 323
Also, if there is no problem, there is no need to form it if there is no problem in strength.

The bolts 1, 2, and 3 described above are used similarly to conventional eye bolts, hinge bolts, and butterfly bolts. However, in the bolt 1 (2, 3) of the embodiment, the bolt head 11 (21, 31) and the bolt portion 12 (22, 32) are separately manufactured, and the bolt length and the various required Screw-sized ones can be provided easily and inexpensively. For example, one or two or more types of bolt heads 11 (21) having female screw holes 111 (211 and 311) for press-fitting and fixing bolt portions each having a plurality of male screw sizes suitable for anticipated requirements. , 31) are prepared in advance, or a plurality of types of bolt portions 12 (22, 32) having a length and a male screw size capable of meeting expected demands are prepared in advance, or such bolt portions are prepared. For example, as described above, the bolt head 11 (21, 31) and the bolt portion 12 (2)
With the proper combination of 2, 2), the bolt 1 (2, 3) having the required length and screw size can be provided simply and inexpensively.

[0033]

According to the present invention, a bolt having a special shape such as an eyebolt, a hinge bolt, or a wing bolt, which has a required length and a screw size and can be easily and inexpensively manufactured. Can be provided. Again
Bolt according to Ming, bolt head hole is a female threaded hole, to which a bolt one end a circular section rod shape to be press-fitted, the one end portion is crushed piles of female screw female Since it is press-fitted and fixed in the screw hole, the operation of press-fitting one end of the bolt part into the female screw hole is easy, and it can be provided simply and easily, and the interconnection and fixing between the bolt head and the bolt part are reliable. .

When the bolt head hole is a through hole and a crimp fixing portion is formed at one end of the bolt portion press-fitted and fixed in the hole on the side opposite to the press-fit side, the caulking fixation is performed. The bolt head portion and the bolt portion are more securely and securely connected and fixed by the portion. Further, according to the present invention, there is provided a method for manufacturing a bolt with a special shape head such as an eyebolt, a hinge bolt, and a butterfly bolt, wherein a bolt having a required length and a screw size is easily and inexpensively provided. Can be.

In manufacturing the bolt of the present invention, the male screw is formed by rolling a bolt having a circular cross-section having an outer diameter equal to the effective diameter of the predetermined male screw except for one end of the bolt. When the bolt portion is provided, the bolt portion can be provided simply and inexpensively, and accordingly, the entire bolt can be manufactured simply, easily and inexpensively. Also, when one end of the bolt portion is press-fitted and fixed to the female screw hole of the bolt portion, and then the one end portion is crimped on the side opposite to the press-fit side to form a fixed portion, the bolt portion and the bolt head are formed. The parts can be interconnected and fixed more reliably and safely.

[Brief description of the drawings]

FIG. 1 shows an example of an eyebolt according to the present invention,
FIG. (A) is a side view of the head of the eyebolt, FIG. (B) is a side view of the bolt, FIG. (C) is a side view of the head and the bolt in the middle of manufacturing the eyebolt, and FIG. It is a side view of an eyebolt.

FIG. 2 shows an example of a hinge bolt according to the present invention,
FIG. (A) is a side view of the head of the hinge bolt, FIG. (B) is a side view of the bolt, FIG. (C) is a side view of the head and the bolt in the middle of the production of the hinge bolt, and FIG. It is a side view of the completed hinge bolt.

3A and 3B show an example of a wing bolt according to the present invention, wherein FIG. 3A is a side view of a head of the wing bolt, FIG. 3B is a side view of a bolt portion, and FIG. FIG. 4D is a side view of the completed wing bolt, showing a side view of the head part and the bolt part in the middle of manufacturing.

FIG. 4A is a side view of a conventional eyebolt, and FIG.
Is a side view of the conventional hinge bolt, and FIG. (C) is a side view of the conventional hinge bolt.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Eye bolt 2 Hinged bolt 3 Wing bolt 11, 21, 31 Bolt head 111, 211, 311 Female screw hole 12, 22, 32 Bolt part 121, 221, 321 Bolt part male screw 122, 222, 322 One end of bolt part 122a, 222a, 322a Piercing part of female screw hole at one end of bolt part 123, 223, 323 Caulking fixing part at one end of bolt part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model 60-184418 (JP, U) Japanese Utility Model 57-73418 (JP, U) Japanese Utility Model 58-104412 (JP, U) Japanese Utility Model Sho 59- 121514 (JP, U) Japanese Utility Model Hei 6-54909 (JP, U) Utility Model Registration 349322 (JP, Z1) Utility Model Registration 353134 (JP, Z1) Tokubo Sho 48-13136 (JP, B1) Shoji Sho56 -39770 (JP, Y2) Jikken 50-46131 (JP, Y2) Jikgyo 56-1396 (JP, Y2) Jiko 10-12586 (JP, Y1) (58) Fields investigated (Int. . ^7, DB name) F16B 35/00 F16B 35/06

Claims (5)

(57) [Claims] A bolt head having a predetermined special shape having a hole for press-fitting and fixing a bolt portion, and a bolt portion having one end portion press-fitted and fixed to the hole, wherein the hole of the bolt head is female screwed.
And one end of the bolt portion has a circular rod shape in cross section.
Thus, one end of the bolt portion crushes the thread of the female screw and
A specially shaped head bolt that is press-fitted into the hole . 2. The bolt head according to claim 1, wherein the hole is a through hole.
At one end of the bolt part press-fitted and fixed in the hole,
The bolt with a special shape head according to claim 1 , wherein a caulking fixing portion is formed on a side opposite to the side . 3. An end having an effective diameter of a male screw of a bolt portion or substantially
A predetermined length formed into a circular rod-shaped cross section having an outer diameter of the effective diameter;
At the one end, press the bolt part of the screw size
Screw size corresponding to the bolt male thread as a regular hole
Female head of a bolt head of a predetermined special shape with a female screw hole
Specially fix the female screw by pressing it into the hole
Manufacturing method of bolt with special shape head. 4. The method according to claim 4, wherein said bolt portion is provided with a predetermined male screw.
A circular bar with an outer diameter equal to the diameter becomes one end of the bolt
Forming the external thread by rolling processing leaving the part
4. The method for producing a bolt with a special shape head according to claim 3, wherein the bolt is provided through a step . 5. The female screw hole of the bolt head is formed through.
Then, one end of the bolt portion was press-fitted and fixed in the female screw hole.
After that, the one end is caulked on the side opposite to the press-fit side.
The method for manufacturing a bolt with a specially shaped head according to claim 3 or 4, wherein the fixing portion is formed .