JP2000120646A - Removal preventive cap for bolt and nut - Google Patents

Removal preventive cap for bolt and nut

Info

Publication number
JP2000120646A
JP2000120646A JP10297079A JP29707998A JP2000120646A JP 2000120646 A JP2000120646 A JP 2000120646A JP 10297079 A JP10297079 A JP 10297079A JP 29707998 A JP29707998 A JP 29707998A JP 2000120646 A JP2000120646 A JP 2000120646A
Authority
JP
Japan
Prior art keywords
bolt
nut
diameter sleeve
small
ring member
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
JP10297079A
Other languages
Japanese (ja)
Inventor
Isao Sasai
績 笹井
Teruaki Iwamoto
晃明 岩本
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.)
SHOICHI KINZOKU KK
Original Assignee
SHOICHI KINZOKU 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 SHOICHI KINZOKU KK filed Critical SHOICHI KINZOKU KK
Priority to JP10297079A priority Critical patent/JP2000120646A/en
Publication of JP2000120646A publication Critical patent/JP2000120646A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To make difficult for a bolt and nut to be removed by mounting a cap on the tip of the bolt. SOLUTION: A large diameteric sleeve 4 is put on a nut 3 fastened to the tip of a bolt 2. A wrench is fitted on a ring member 7 put on a small diameteric sleeve 5, and the sleeve 5 is rotated together with the ring member 7 so that threads on the internal circumferential surface of the sleeve 5 are driven onto the tip of the bolt 2. At this time, the sleeve 5 is driven by a minor torque until a bottom flange 6 abuts to the top face of the nut 3 secured to the tip of the bolt 2, and when the flange 6 abuts to the nut 3, a torque is gradually increased to apply to a coupling member 8 installed between the flange 6 and the ring member 7. When the coupling member 8 is ruptured, the wrench is fitted on the ring member 7, and even if the ring member 7 is rotated in the direction of loosening, the ring member 7 remains idling with respect to the sleeve 5, so that it is not possible for the sleeve 5 to be rotated in the direction of loosening.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】この発明は、送電用鉄塔など
を固定しているボルト・ナットの取り外しを困難にする
ために、ボルトの先端に装着されるボルト・ナットの取
り外し防止キャップに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap for preventing the removal of a bolt and a nut attached to the tip of a bolt in order to make it difficult to remove a bolt and a nut fixing a power transmission tower or the like. .

【0002】[0002]

【従来の技術とその課題】送電用鉄塔を固定しているボ
ルト・ナットが何者かに取り外され、送電用鉄塔が倒壊
させられたという事件が香川県坂出市で起こった。
2. Description of the Related Art An incident occurred in Sakaide City, Kagawa Prefecture, in which bolts and nuts fixing a power transmission tower were removed by someone and the power transmission tower was collapsed.

【0003】この発明は、かかる事件の再発防止のため
に、ボルトの先端に装着することにより、ボルト・ナッ
トの取り外しを困難にすることができるボルト・ナット
の取り外し防止キャップを提供しようとするものであ
る。
An object of the present invention is to provide a bolt / nut removal preventing cap which can make it difficult to remove the bolt / nut by mounting it on the tip of the bolt in order to prevent such incidents from reoccurring. It is.

【0004】[0004]

【課題を解決するための手段】この発明に係るボルト・
ナットの取り外し防止キャップは、ボルトの先端が突出
する状態で締付け固定されているナットの周囲に、所定
の空間をあけてボルトの先端側からナットに対して回転
可能に被せられる円筒形の大径スリーブと、内周面にボ
ルトに螺合するねじ山を有する円筒形の小径スリーブ
と、上記小径スリーブの下端外面に形成されたフランジ
部と、上記小径スリーブの外周に、小径スリーブに対し
て回転可能に被せられ、かつ外面形状がナットの外面形
状と同一のリング部材とからなり、上記フランジ部とリ
ング部材との対向面間に、両者を結合し、一定以上の回
転トルクが加わると破断して両者の結合を解除する連結
部材を設けた構成としている。
According to the present invention, there is provided a bolt and a bolt.
The nut removal prevention cap is a large-diameter cylindrical cylinder that is rotatably placed on the nut from the tip side of the bolt with a predetermined space around the nut that is tightened and fixed with the tip of the bolt protruding. A sleeve, a cylindrical small-diameter sleeve having a thread threaded to a bolt on an inner peripheral surface, a flange formed on an outer surface of a lower end of the small-diameter sleeve, and an outer periphery of the small-diameter sleeve, which is rotated with respect to the small-diameter sleeve. It is covered as possible, and the outer surface shape is made of the same ring member as the outer surface shape of the nut, and the flange portion and the ring member are joined between the opposing surfaces, and when the rotational torque of a certain degree or more is applied, it is broken. And a connecting member for releasing the connection between them is provided.

【0005】送電用鉄塔等に設置されたボルトは、その
先端がナットから突出するように締付けられているの
で、ボルト先端に締付けられているナットに大径スリー
ブを被せ、小径スリーブの外周に被せられたリング部材
の外面にレンチを嵌めて、リング部材と共に小径スリー
ブを回転させて、小径スリーブの内周面のねじ山をボル
ト先端にねじ込む。
[0005] Since the bolts installed on the power transmission tower or the like are fastened so that the tips project from the nuts, the nuts fastened to the bolt tips are covered with a large-diameter sleeve, and are covered over the outer periphery of the small-diameter sleeve. A wrench is fitted on the outer surface of the ring member, and the small-diameter sleeve is rotated together with the ring member, so that the thread on the inner peripheral surface of the small-diameter sleeve is screwed into the tip of the bolt.

【0006】小径スリーブは、下端のフランジ部が、ボ
ルト先端に締付け固定されているナットの外面に当たる
までは、比較的小さな回転トルクでボルト先端にねじ込
まれていくが、フランジ部がナットに当たると、フラン
ジ部と小径スリーブの外周のリング部材との間に設けら
れた連結部材に徐々に大きな回転トルクが加わり、一定
以上の回転トルクが加わると、連結部材が破断する。
[0006] The small-diameter sleeve is screwed into the bolt tip with a relatively small rotating torque until the flange at the lower end contacts the outer surface of the nut fastened and fixed to the bolt tip. A large rotating torque is gradually applied to the connecting member provided between the flange portion and the ring member on the outer periphery of the small-diameter sleeve, and when the rotating torque of a certain level or more is applied, the connecting member is broken.

【0007】このようにして、小径スリーブをボルトの
先端にねじ込んで連結部材を破断させると、リング部材
にレンチを嵌めてリング部材を緩める方向に回転させて
も、リング部材は小径スリーブに対して空回りするの
で、小径スリーブを緩める方向に回転させることができ
なくなる。
In this way, when the small-diameter sleeve is screwed into the end of the bolt to break the connecting member, the ring member can be moved relative to the small-diameter sleeve even if the wrench is fitted into the ring member and the ring member is rotated in the loosening direction. Since it runs idle, the small diameter sleeve cannot be rotated in the loosening direction.

【0008】そして、この状態で、ナットの周囲は、大
径スリーブによって覆われ、ナットにレンチを嵌めるこ
ともできなくなるので、ナットの取り外しができなくな
る。
In this state, the periphery of the nut is covered by the large-diameter sleeve, and the wrench cannot be fitted to the nut, so that the nut cannot be removed.

【0009】[0009]

【実施の形態】図1は、この発明に係るボルト・ナット
の取り外し防止キャップ1を装着した、送電用鉄塔Aの
フランジBの固定部分を示している。
FIG. 1 shows a fixing portion of a flange B of a power transmission tower A to which a cap 1 for preventing removal of bolts and nuts according to the present invention is attached.

【0010】ボルト2は、頭部と軸部とからなり、頭部
が送電用鉄塔AのフランジBの下面側に位置するよう
に、フランジBに挿通されている。
The bolt 2 has a head and a shaft, and is inserted through the flange B such that the head is located on the lower surface side of the flange B of the power transmission tower A.

【0011】上記ボルト2には、二個のナット3が締付
け固定され、その先端が上方のナット3から突出するよ
うになっている。
Two nuts 3 are fastened and fixed to the bolt 2, and the tips thereof protrude from the upper nut 3.

【0012】この発明に係るボルト・ナットの取り外し
防止キャップ1は、上記二個のナット3に所定の空間を
あけて被せられる大径スリーブ4と、内周面にボルト2
に螺合するねじ山を有する円筒形の小径スリーブ5と、
小径スリーブ5の下端外面に形成されたフランジ部6
と、上記小径スリーブ5の外周に、小径スリーブ5に対
して回転可能に被せられ、かつ外面形状がナット3の外
面形状と同一のリング部材7とからなる。
The bolt / nut removal prevention cap 1 according to the present invention comprises a large-diameter sleeve 4 which covers the two nuts 3 with a predetermined space, and a bolt 2 on the inner peripheral surface.
A cylindrical small-diameter sleeve 5 having a thread which is screwed into
Flange 6 formed on outer surface of lower end of small diameter sleeve 5
And a ring member 7 rotatably mounted on the outer periphery of the small diameter sleeve 5 with respect to the small diameter sleeve 5 and having the same outer surface shape as the outer surface shape of the nut 3.

【0013】そして、上記フランジ部6とリング部材7
との対向面間には、両者を結合し、一定以上の回転トル
クが加わると破断して両者の結合を解除する連結部材8
が設けられている。この連結部材7は、リング部材7と
フランジ部6に形成した貫通孔に、一定以上の力で折損
するピンを差し込むことによって構成することができ
る。
The flange 6 and the ring member 7
A connecting member 8 which connects the two and breaks when a rotational torque of a certain degree or more is applied to release the connection between them.
Is provided. The connecting member 7 can be configured by inserting a pin that breaks with a certain force or more into a through hole formed in the ring member 7 and the flange portion 6.

【0014】上記リング部材7は、小径スリーブ5の上
端縁を外側に広げることによって、小径スリーブ5に対
して回転可能に連結されている。
The ring member 7 is rotatably connected to the small-diameter sleeve 5 by expanding the upper end edge of the small-diameter sleeve 5 outward.

【0015】この発明に係るボルト・ナットの取り外し
防止キャップ1は、金属製であり、鍛造等により形成さ
れている。
The bolt / nut removal prevention cap 1 according to the present invention is made of metal and formed by forging or the like.

【0016】そして、図2及び図3に示すように、小径
スリーブ5、フランジ部6及び大径スリーブ4を一体に
形成してもよいし、フランジ部6の下方部分の大径スリ
ーブ4を、図6及び図7に示すように、別体に形成して
もよい。
As shown in FIGS. 2 and 3, the small-diameter sleeve 5, the flange portion 6, and the large-diameter sleeve 4 may be integrally formed. Alternatively, the large-diameter sleeve 4 below the flange portion 6 may be formed as follows. As shown in FIGS. 6 and 7, they may be formed separately.

【0017】この発明に係るボルト・ナットの取り外し
防止キャップ1の使用方法は、次の通りである。
The method of using the bolt / nut removal preventing cap 1 according to the present invention is as follows.

【0018】まず、ボルト2の先端に締付けられている
ナット3に大径スリーブ4を被せる。そして、小径スリ
ーブ5の外周に被せられたリング部材7の外面にレンチ
を嵌めて、リング部材7と共に小径スリーブ5を回転さ
せ、小径スリーブ5の内周面のねじ山をボルト2の先端
にねじ込んでいく。この際、小径スリーブ5は、下端の
フランジ部6がボルト2の先端に締付け固定されている
ナット3の上端面に当たるまでは、比較的小さな回転ト
ルクでボルト2の先端にねじ込まれるが、フランジ部6
がナット3に当たると、フランジ部6と小径スリーブ5
の外周のリング部材7との間に設けられた連結部材8に
徐々に大きな回転トルクが加わる。そして、連結部材8
を破断させると、リング部材7にレンチを嵌めて、リン
グ部材7を緩める方向に回転させても、リング部材7は
小径スリーブ5に対して空回りするので、小径スリーブ
5を緩める方向に回転させることができなくなる。
First, a large-diameter sleeve 4 is put on a nut 3 fastened to the tip of a bolt 2. Then, a wrench is fitted on the outer surface of the ring member 7 covered on the outer periphery of the small-diameter sleeve 5, and the small-diameter sleeve 5 is rotated together with the ring member 7, and the thread on the inner peripheral surface of the small-diameter sleeve 5 is screwed into the tip of the bolt 2. Go out. At this time, the small-diameter sleeve 5 is screwed into the distal end of the bolt 2 with a relatively small rotating torque until the flange 6 at the lower end contacts the upper end surface of the nut 3 fastened to the distal end of the bolt 2. 6
When the nut contacts the nut 3, the flange 6 and the small-diameter sleeve 5
A large rotation torque is gradually applied to the connecting member 8 provided between the outer ring member 7 and the ring member 7. And the connecting member 8
When the wrench is broken, even if the wrench is fitted to the ring member 7 and the ring member 7 is rotated in the loosening direction, the ring member 7 idles with respect to the small-diameter sleeve 5, so that the small-diameter sleeve 5 is rotated in the loosening direction. Can not be done.

【0019】このように、連結部材8を破断させると、
リング部材7が空回りし、ナット3も大径スリーブ4に
よって覆われているため、ナット3にレンチを嵌めるこ
とができなくなり、ナット3の取り外しを防止できる。
As described above, when the connecting member 8 is broken,
Since the ring member 7 idles and the nut 3 is also covered by the large-diameter sleeve 4, the wrench cannot be fitted to the nut 3 and the removal of the nut 3 can be prevented.

【0020】[0020]

【発明の効果】以上のように、この発明に係るボルト・
ナットの取り外し防止キャップは、ボルトの先端にねじ
込み、連結部材を破断させることにより、ナットの取り
外しを防止できる。
As described above, the bolt according to the present invention
The nut removal prevention cap can be prevented from being removed by screwing into the tip of the bolt and breaking the connecting member.

【0021】また、ボルト・ナットの取り外し防止キャ
ップのリング部材の外面形状は、ナットの外面形状を同
一形状に形成されいるので、ナットの締め付けと同じ大
きさのレンチを使用することができ、作業性がよい。
Further, the outer shape of the ring member of the cap for preventing the removal of the bolt and nut is the same as the outer shape of the nut, so that a wrench having the same size as the tightening of the nut can be used. Good nature.

【図面の簡単な説明】[Brief description of the drawings]

【図1】この発明に係るボルト・ナットの取り外し防止
キャップの使用状態を示す斜視図
FIG. 1 is a perspective view showing a use state of a bolt / nut removal prevention cap according to the present invention.

【図2】この発明に係るボルト・ナットの取り外し防止
キャップの一例を示す斜視図
FIG. 2 is a perspective view showing an example of a bolt / nut removal prevention cap according to the present invention.

【図3】図2の例の縦断面図FIG. 3 is a longitudinal sectional view of the example of FIG. 2;

【図4】図2の例において連結部材を破断させる前の状
態を示す縦断面図
FIG. 4 is a longitudinal sectional view showing a state before a connecting member is broken in the example of FIG. 2;

【図5】図2の例において連結部材を破断させた状態の
斜視図
FIG. 5 is a perspective view showing a state in which a connecting member is broken in the example of FIG. 2;

【図6】この発明に係るボルト・ナットの取り外し防止
キャップの他の例を示す斜視図
FIG. 6 is a perspective view showing another example of the bolt / nut removal prevention cap according to the present invention.

【図7】図6の例の縦断面図FIG. 7 is a longitudinal sectional view of the example of FIG. 6;

【符号の説明】[Explanation of symbols]

1 ボルト・ナットの取り外し防止キャップ 2 ボルト 3 ナット 4 大径スリーブ 5 小径スリーブ 6 フランジ部 7 リング部材 8 連結部材 1 Cap to prevent removal of nuts and bolts 2 Bolt 3 Nut 4 Large diameter sleeve 5 Small diameter sleeve 6 Flange 7 Ring member 8 Connecting member

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 ボルトの先端が突出する状態で締付け固
定されているナットの周囲に、所定の空間をあけてボル
トの先端側からナットに対して回転可能に被せられる円
筒形の大径スリーブと、内周面にボルトに螺合するねじ
山を有する円筒形の小径スリーブと、上記小径スリーブ
の下端外面に形成されたフランジ部と、上記小径スリー
ブの外周に、小径スリーブに対して回転可能に被せら
れ、かつ外面形状がナットの外面形状と同一のリング部
材とからなり、上記フランジ部とリング部材との対向面
間に、両者を結合し、一定以上の回転トルクが加わると
破断して両者の結合を解除する連結部材を設けたことを
特徴とするボルト・ナットの取り外し防止キャップ。
A cylindrical large-diameter sleeve rotatably mounted on the nut from the tip end side of the bolt with a predetermined space around a nut fixedly fastened with the tip end of the bolt protruding; A cylindrical small-diameter sleeve having a screw thread to be screwed into a bolt on an inner peripheral surface, a flange formed on an outer surface of a lower end of the small-diameter sleeve, and an outer periphery of the small-diameter sleeve rotatable with respect to the small-diameter sleeve. It is covered, and the outer surface shape is made of the same ring member as the outer surface shape of the nut. Between the opposed surfaces of the flange portion and the ring member, the two are joined, and when a rotation torque of a certain degree or more is applied, the two are broken and both are broken. A bolt for preventing removal of bolts and nuts, comprising a connecting member for releasing the connection between the bolt and the nut.
【請求項2】 上記フランジ部と小径スリーブが、大径
スリーブに対して分離して設けられている請求項1記載
のボルト・ナットの取り外し防止キャップ。
2. The bolt / nut removal prevention cap according to claim 1, wherein the flange portion and the small diameter sleeve are provided separately from the large diameter sleeve.
【請求項3】 上記フランジ部と小径スリーブが、大径
スリーブと一体に設けられている請求項1記載のボルト
・ナットの取り外し防止キャップ。
3. The bolt / nut removal prevention cap according to claim 1, wherein the flange portion and the small diameter sleeve are provided integrally with the large diameter sleeve.
JP10297079A 1998-10-19 1998-10-19 Removal preventive cap for bolt and nut Pending JP2000120646A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10297079A JP2000120646A (en) 1998-10-19 1998-10-19 Removal preventive cap for bolt and nut

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10297079A JP2000120646A (en) 1998-10-19 1998-10-19 Removal preventive cap for bolt and nut

Publications (1)

Publication Number Publication Date
JP2000120646A true JP2000120646A (en) 2000-04-25

Family

ID=17841938

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10297079A Pending JP2000120646A (en) 1998-10-19 1998-10-19 Removal preventive cap for bolt and nut

Country Status (1)

Country Link
JP (1) JP2000120646A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007309485A (en) * 2006-05-22 2007-11-29 Maruichi Kk Fastening nut
CN105805146A (en) * 2016-05-31 2016-07-27 常州市耐斯工控工程有限公司 Anti-stirring fastener gasket with slip sheet
CN111828457A (en) * 2020-07-27 2020-10-27 周福义 Anti-theft nut

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007309485A (en) * 2006-05-22 2007-11-29 Maruichi Kk Fastening nut
JP4686674B2 (en) * 2006-05-22 2011-05-25 丸一株式会社 Tightening nut
CN105805146A (en) * 2016-05-31 2016-07-27 常州市耐斯工控工程有限公司 Anti-stirring fastener gasket with slip sheet
CN111828457A (en) * 2020-07-27 2020-10-27 周福义 Anti-theft nut
CN111828457B (en) * 2020-07-27 2021-11-02 周福义 Anti-theft nut

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