JP2004257546A - Bolt with nut fall-off preventing mechanism - Google Patents

Bolt with nut fall-off preventing mechanism Download PDF

Info

Publication number
JP2004257546A
JP2004257546A JP2003096542A JP2003096542A JP2004257546A JP 2004257546 A JP2004257546 A JP 2004257546A JP 2003096542 A JP2003096542 A JP 2003096542A JP 2003096542 A JP2003096542 A JP 2003096542A JP 2004257546 A JP2004257546 A JP 2004257546A
Authority
JP
Japan
Prior art keywords
nut
bolt
movable spring
slit
movable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003096542A
Other languages
Japanese (ja)
Inventor
Toshinobu Nagata
稔信 永田
Yasushi Oura
泰 大浦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JR SOKEN DENKI SYSTEM KK
Original Assignee
JR SOKEN DENKI SYSTEM KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JR SOKEN DENKI SYSTEM KK filed Critical JR SOKEN DENKI SYSTEM KK
Priority to JP2003096542A priority Critical patent/JP2004257546A/en
Publication of JP2004257546A publication Critical patent/JP2004257546A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Bolts, Nuts, And Washers (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To actualize a nut fall-off preventing mechanism only by using a tightening method with usual nut turning operation. <P>SOLUTION: This bolt 2 comprises a movable spring 6 formed of an elastic material and mounted in a slit 4 of a screw portion or on a columnar shaft consisting of the screw portion and a columnar shaft portion 5. Thus, the looseness and returning action of a nut is automatically prevented by the original restoring force of the movable spring after tightening with the usual nut turning operation and the fall-off of the nut is surely prevented. The bolt 2 has simple construction permitting easy tightening and removal of the nut, allowing a person to do safe and profitable work completely free of error after tightening and surely preventing the fall-off of the nut. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、ボルト・ナットによる締結後のナットの脱落防止装置に関する。
【0002】
【従来の技術】従来の、ボルト・ナット締結後のナット脱落防止方法としては、
締結後に割りピンを挿入したり、タッピンねじをねじ込んだり、弾性リングを装着したナットやもどり止めピンを装填したナットを用いたり、軟質プラスチックリングをボルトのくびれ部と、ねじ部の境目に付着させたり等、種々の方法が用いられてきた。
【0003】
【発明が解決しようとする課題】
しかしながら、これらの方法は、いずれも複雑かつ作業性が悪く、不確実であった。また確実性を増す為に行う補修工事や補修部品管理を伴う方法は施工に係わる総合的品質を確実に保持することが困難であるばかりでなく、経済的コストの面でも問題があった。
【0004】
特に締結後の補修工事を必要とする方法は、作業忘れというヒューマンエラーをどうしても避けることができず、ナットの脱落を完全に防止することができないという重大な問題点があった。
【0005】
本発明の目的は、何等加工を施さないナットと、ボルトの一部分に脱落防止用の可動スプリングを装備したボルトで構成するだけで、通常のナット回し操作による締結方法のみで確実なナット脱落防止機能を持たせる。
【0006】
ナットの締結およびナット取外しも容易に行えるシンプルな構成で、補修工事を必要としないヒューマンエラーを除去した、高信頼性を有する脱落防止機能付のボルト・ナットを提供するのを目的とする。
【0007】
【課題を解決するための手段】
上記目的を達成するため、本発明のナット脱落防止機構付きボルトは、弾力性のある素材で成型された可動スプリングをボルトのねじ部分に設けたスリット部、あるいは、ねじ部と円柱軸部から成るボルトの円柱軸部に装備する。そして通常のナットの締結後、その可動スプリングの可動性と原型復元力を利用するだけで、自動的に脱落防止を可能にする。
【0008】
ボルトのねじ部あるいは円柱軸部からナットを挿入し、通常のナット回し操作により、可動スプリングの可動部を圧縮させながら通過させて締結を完了すると、可動スプリングはその原型復元力によってもとの大きさの形状に戻り、自動的にナットの弛み、戻り作動を阻止してナットの脱落を防止する。
【0009】
可動スプリングの可動性と原型復元力のみを利用して、ナット締結およびナット取外しも容易に行えるシンプル構造なので、締結後の補修工事を何等必要としない、ヒューマンエラーを完全に除去した施工が可能となりナットの脱落防止を確実に実現できる。
【0010】
【発明の実施の形態】
以下に本発明の実施の形態を図面に基づいて説明する。
【0011】
本発明の一実施例を図1、図2に示す。ボルト・ナット組(1)の基本構成は、ボルト(2)、ナット(3)、可動スプリング(6)である。
【0012】
本発明の一実施例であるナット脱落防止機構付きボルトの側面断面図を図3に示す。ナット(3)は一般的な規格品で通常の回し操作で締結できるものを使用し、ボルト(2)のねじ部分に設けたスリット部(4)には可動スプリング(6)が装備され、ナット締結後の可動スプリングの原型復元力によって、自動的にナットの弛み、戻り作動を阻止してナット脱落を防止する。
【0013】
本発明の一実施例であるナット脱落防止機構付きボルトの側面断面図を図4に示す。ナット(3)は一般的な規格品で通常の回し操作で締結できるものを使用し、ボルト(2)のねじ部分に設けた円柱軸部(5)には可動スプリング(6)が装備され、ナット締結後の可動スプリングの原型復元力によって、自動的にナットの弛み、戻り作動を阻止してナット脱落を防止する。
【0014】
【発明の効果】上述の構成によれば、締結に必要不可欠な通常のナットの回し操作のみで、ボルトの可動スプリング可動部を通過させた締結後に自動的にナット脱落を確実に防止できる。このため、ナットを回す操作以外は不要となり、締結後の補修工事を必要としないヒューマンエラーを完全に除去した高信頼性を有するボルト・ナットによる締結の施工を容易かつ安全に行うことができる。
【図面の簡単な説明】
【図1】請求項2で述べた本発明の使用状態の一例を示すもので、ナット(3)とボルト(2)のねじ部分にスリット部(4)を設け、その両端に可動スプリング(6)の可動スプリング可動用穴(7)と可動スプリング固定用スリット(9)で構成されるボルト・ナット組み(1)の側面外観図である。
【図2】請求項3で述べた本発明の使用状態の一例を示すもので、ナット(3)とボルト(2)にねじ部と円柱軸部(5)を設け、その両端に可動スプリング(6)の可動スプリング可動用穴(7)と可動スプリング固定用穴(8)で構成されるボルト・ナット組み(1)の側面外観図である。
【図3】請求項2で述べた本発明の使用状態の一例を示すもので、スリット部(4)の両端に可動スプリング可動用穴(7)と可動スプリング固定用スリット(9)とで構成されるボルト・ナット組み(1)の側面断面図である。
【図4】請求項3で述べた本発明の使用状態の一例を示すもので、円柱軸部(5)の両端に可動スプリング可動用穴(7)と可動スプリング固定用穴(8)で構成されるボルト・ナット組み(1)の側面断面図である。
【符号の説明】
1 ボルト・ナット組み
2 ボルト
3 ナット
4 スリット部
5 円柱軸部
6 可動スプリング
7 可動スプリング可動用穴
8 可動スプリング取付用穴
9 可動スプリング固定用スリット
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an apparatus for preventing a nut from falling off after fastening with a bolt and nut.
[0002]
2. Description of the Related Art Conventional methods for preventing nuts from dropping after bolts and nuts are fastened include:
After fastening, insert a split pin, screw in a tapping screw, use a nut with an elastic ring or a nut with a detent pin, or attach a soft plastic ring to the constriction between the bolt and the thread. Various methods have been used, such as settling.
[0003]
[Problems to be solved by the invention]
However, all of these methods are complicated, poor in workability, and uncertain. In addition, a method involving repair work and repair parts management performed to increase the reliability is not only difficult to reliably maintain the overall quality of the work, but also has a problem in terms of economic cost.
[0004]
In particular, the method that requires repair work after fastening has a serious problem that human error of forgetting to work cannot be avoided by all means, and it is not possible to completely prevent the nut from falling off.
[0005]
An object of the present invention is to form a nut without any processing and a bolt equipped with a movable spring for preventing a part of the bolt from falling off, and a reliable nut dropping prevention function only by a fastening method by a normal nut turning operation. To have.
[0006]
An object of the present invention is to provide a highly reliable bolt / nut with a drop-out prevention function which has a simple configuration in which nuts can be easily fastened and removed and which eliminates human errors which do not require repair work and has a high reliability.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a nut with a nut drop prevention mechanism of the present invention includes a slit portion provided with a movable spring formed of an elastic material in a screw portion of the bolt, or a screw portion and a cylindrical shaft portion. Equipped on the cylindrical shaft of the bolt. Then, after the normal nut is fastened, it can be automatically prevented from falling off only by utilizing the movability of the movable spring and the original restoring force.
[0008]
A nut is inserted from the threaded portion of the bolt or the cylindrical shaft, and the nut is turned by a normal nut turning operation, and the movable portion of the movable spring is compressed and passed to complete the fastening.The movable spring returns to its original size due to its original restoring force. It returns to the shape of a nut and automatically prevents the nut from loosening and returning, preventing the nut from falling off.
[0009]
Using only the mobility of the movable spring and the original restoring force, it is a simple structure that can easily tighten and remove nuts, so no repair work after fastening is required, and construction that completely eliminates human error is possible. The nut can be reliably prevented from falling off.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0011]
One embodiment of the present invention is shown in FIGS. The basic configuration of the bolt / nut set (1) is a bolt (2), a nut (3), and a movable spring (6).
[0012]
FIG. 3 is a side sectional view of a bolt with a nut dropout prevention mechanism according to one embodiment of the present invention. The nut (3) is a general standard product that can be fastened by a normal turning operation. The slit (4) provided in the screw portion of the bolt (2) is equipped with a movable spring (6). The loosening and return operation of the nut are automatically prevented by the restoring force of the movable spring after fastening, thereby preventing the nut from falling off.
[0013]
FIG. 4 is a side sectional view of a bolt with a nut dropout prevention mechanism according to an embodiment of the present invention. The nut (3) is a general standard product that can be fastened by ordinary turning operation. The movable shaft (6) is equipped on the cylindrical shaft (5) provided on the screw part of the bolt (2). The restoring force of the movable spring after fastening the nut automatically prevents the nut from loosening and returning, thereby preventing the nut from falling off.
[0014]
According to the above construction, the nut can be reliably prevented from falling off automatically after the bolt is passed through the movable spring movable portion and fastened only by the ordinary nut turning operation indispensable for the fastening. For this reason, the operation other than the operation of turning the nut is unnecessary, and the fastening work using the highly reliable bolt and nut that completely eliminates the human error that does not require the repair work after the fastening can be easily and safely performed.
[Brief description of the drawings]
FIG. 1 shows an example of a use state of the present invention described in claim 2, wherein a slit portion (4) is provided in a thread portion of a nut (3) and a bolt (2), and a movable spring (6) is provided at both ends thereof. 4) is a side view of a bolt and nut combination (1) composed of a movable spring movable hole (7) and a movable spring fixing slit (9).
FIG. 2 shows an example of a use state of the present invention described in claim 3, wherein a nut portion (3) and a bolt (2) are provided with a screw portion and a cylindrical shaft portion (5), and a movable spring (5) is provided at both ends thereof. FIG. 6B is a side view of a bolt and nut combination (1) composed of a movable spring movable hole (7) and a movable spring fixing hole (8).
FIG. 3 shows an example of a use state of the present invention described in claim 2, comprising a movable spring moving hole (7) and a movable spring fixing slit (9) at both ends of a slit portion (4). FIG. 2 is a side sectional view of a bolt and nut assembly (1) to be used.
FIG. 4 shows an example of a use state of the present invention described in claim 3, comprising a movable spring movable hole (7) and a movable spring fixed hole (8) at both ends of a cylindrical shaft portion (5). FIG. 2 is a side sectional view of a bolt and nut assembly (1) to be used.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bolt and nut combination 2 Bolt 3 Nut 4 Slit part 5 Cylindrical shaft part 6 Movable spring 7 Movable spring movable hole 8 Movable spring mounting hole 9 Movable spring fixing slit

Claims (2)

ボルト(2)、ナット(3)、からなるボルト・ナット組み(1)において、ボルト(2)のねじ部分にスリット部(4)を設け、そのスリット部(4)の溝部内径は、ねじ部の谷内径より小さい形状とし、そのスリット部(4)の両端に可動スプリング可動用穴(7)と可動スプリング取付用穴(8)あるいは、可動スプリング固定用スリット(9)を設けたことを特徴とする、ナット脱落防止機構付きボルト。In a bolt / nut assembly (1) composed of a bolt (2) and a nut (3), a slit (4) is provided in a screw portion of the bolt (2), and the groove inner diameter of the slit (4) is a screw portion. And a slit (4) provided with a movable spring movable hole (7) and a movable spring mounting hole (8) or a movable spring fixing slit (9) at both ends of the slit portion (4). Bolt with nut dropout prevention mechanism. ボルト(2)、ナット(3)、からなるボルト・ナット組み(1)において、ボルト(2)にねじ部と円柱軸部(5)を設け、その円柱軸部(5)の直径は、ねじ部の谷内径より小さい形状とし、その円柱軸部(5)の両端に可動スプリング可動用穴(7)と可動スプリング取付用穴(8)あるいは、可動スプリング固定用スリット(9)を設けたことを特徴とする、ナット脱落防止機構付きボルト。In a bolt and nut assembly (1) including a bolt (2) and a nut (3), a screw portion and a cylindrical shaft portion (5) are provided on the bolt (2), and the diameter of the cylindrical shaft portion (5) is equal to the screw diameter. The movable spring movable hole (7) and the movable spring mounting hole (8) or the movable spring fixing slit (9) are provided at both ends of the cylindrical shaft portion (5). A bolt with a nut drop-off prevention mechanism.
JP2003096542A 2003-02-24 2003-02-24 Bolt with nut fall-off preventing mechanism Pending JP2004257546A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003096542A JP2004257546A (en) 2003-02-24 2003-02-24 Bolt with nut fall-off preventing mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003096542A JP2004257546A (en) 2003-02-24 2003-02-24 Bolt with nut fall-off preventing mechanism

Publications (1)

Publication Number Publication Date
JP2004257546A true JP2004257546A (en) 2004-09-16

Family

ID=33127498

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003096542A Pending JP2004257546A (en) 2003-02-24 2003-02-24 Bolt with nut fall-off preventing mechanism

Country Status (1)

Country Link
JP (1) JP2004257546A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102606608A (en) * 2012-03-31 2012-07-25 常熟南师大发展研究院有限公司 Anti-off bolt
CN111365355A (en) * 2020-04-08 2020-07-03 贵州电网有限责任公司 Bolt with self-locking function

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102606608A (en) * 2012-03-31 2012-07-25 常熟南师大发展研究院有限公司 Anti-off bolt
CN111365355A (en) * 2020-04-08 2020-07-03 贵州电网有限责任公司 Bolt with self-locking function

Similar Documents

Publication Publication Date Title
JPH1193933A (en) Lock nut with nut mating means
GB0306826D0 (en) A wrench
JP2004257546A (en) Bolt with nut fall-off preventing mechanism
US20110197410A1 (en) Frangible collar removal tool
JP2006170263A (en) Tightening device and game machine using the same
JP2001138257A (en) Screwdriver
JP2006167894A (en) Double nut fastening tool
JPH074418A (en) Locking structure for object
JPH0681830A (en) Nut
JP2001054876A (en) Jig for management of fastening torque of fastening part
JP2002192474A (en) Fastening tool
JPH10202414A (en) Cutter device for machine tool
JPH11300509A (en) Chuck
JP2005256879A (en) Part fixing device
JP3054940U (en) Cylindrical washer that cannot easily loosen bolts and nuts
JP2008238373A (en) Turning tool
JPS6015602Y2 (en) knife mounting device
JP2007278413A (en) Screw, and member fastening method using the same, and fastening release method
JP3037398U (en) Socket wrench
JP2001050237A (en) Structure, tool and method for preventing loosening of nut
JP2005106146A (en) Combination nut with high workability
US20080134858A1 (en) Bolt Lock For Left Handed Threaded Bolts
JP2023014954A (en) Unloosed fastening structure
JP2001221215A (en) Detachment prevention structure for insertion member
JP2002155918A (en) Loosing action protecting screw