JP2015028350A - Theft prevention bolt - Google Patents

Theft prevention bolt Download PDF

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JP2015028350A
JP2015028350A JP2013157520A JP2013157520A JP2015028350A JP 2015028350 A JP2015028350 A JP 2015028350A JP 2013157520 A JP2013157520 A JP 2013157520A JP 2013157520 A JP2013157520 A JP 2013157520A JP 2015028350 A JP2015028350 A JP 2015028350A
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Japan
Prior art keywords
screw member
bolt
bolt body
resin
screw
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JP6069649B2 (en
Inventor
田中　衛
Mamoru Tanaka
衛 田中
重樹 松並
Shigeki Matsunami
重樹 松並
瀬古　尚廣
Naohiro Seko
尚廣 瀬古
岐宣 鈴木
Michinobu Suzuki
岐宣 鈴木
木村　浩章
Hiroaki Kimura
浩章 木村
幹根 粂
Mikine Kume
幹根 粂
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Aoyama Seisakusho Co Ltd
Denso Corp
Toyota Motor Corp
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Aoyama Seisakusho Co Ltd
Denso Corp
Toyota Motor Corp
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Priority to JP2013157520A priority Critical patent/JP6069649B2/en
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Abstract

PROBLEM TO BE SOLVED: To provide a theft prevention bolt which can be fastened at constant fastening torque by using a general purpose tool and is provided with a function to prevent theft.SOLUTION: A head part 4c of a bolt body 4 has a fitting hole 8 for fitting a screw part 6a of a screw member 6, and the screw member 6 is fixed to the fitting hole 8 by resin insert molding. Thus, it is possible to fix the bolt body 4 integrated by resin 7 to a female screw member by fastening a hexagonal head part 6b of the screw member 6 at constant fastening torque. Moreover, when loosening, only the screw member 6 comes off the screw hole of the resin 7, and in order to hold the state fixed to the female screw member, an upper part of the bolt body 4 has no part to engage the tool. As it takes time to remove the bolt body 4, it is possible to prevent theft of a key cylinder or the like to be objects to be fastened fitted to the female screw member with the bolt body 4.

Description

本発明は、盗難防止機能を備えたボルトに関するものである。   The present invention relates to a bolt having an anti-theft function.

例えば自動車のステアリング部におけるキーシリンダ等の盗難防止を目的として、特許文献１に示すような首切りボルトが採用されている。これは、図１および図２に示すように、扁平な円錐状部１の下側におねじ部３を形成し、この円錐状部１の上側に六角柱状の頭部２を形成したものであり、頭部２と円錐状部１との接続部は細径の破断部２ａとなっている。このため、汎用工具を用いて締付可能であり、かつ締付トルクが規定トルクを超えると細径の破断部２ａが破断して頭部２が分離され、円錐状部１のみが残る。この円錐状部１には、工具を係合させることができる部分がないため、めねじ部材から取り外されることを防止するものである。   For example, for the purpose of preventing theft of a key cylinder or the like in a steering part of an automobile, a neck trim bolt as shown in Patent Document 1 is employed. As shown in FIGS. 1 and 2, a screw portion 3 is formed below the flat conical portion 1, and a hexagonal column-shaped head 2 is formed above the conical portion 1. In addition, the connecting portion between the head 2 and the conical portion 1 is a broken portion 2a having a small diameter. For this reason, it can be tightened using a general-purpose tool, and when the tightening torque exceeds the specified torque, the small-diameter fracture portion 2a breaks and the head portion 2 is separated, leaving only the conical portion 1. Since the conical portion 1 has no portion with which the tool can be engaged, it is prevented from being removed from the female screw member.

しかしながら、このような首切りボルトは破断部径差や熱処理による硬度差、さらには締付姿勢の違い等の影響により、破断部２ａの破断トルクが一定とならないため、結果として締付トルクが安定しない点が問題であった。   However, since such a neck-cut bolt has a fracture torque of the fracture portion 2a that is not constant due to a difference in fracture portion diameter, a difference in hardness due to heat treatment, and a difference in tightening posture, the tightening torque is not stable as a result. The point was a problem.

特公平７−４５０８２号公報Japanese Patent Publication No. 7-45082

したがって本発明の目的は前記した従来の問題点を解決し、汎用工具を用いて一定の締付トルクで締付可能であり、かつ盗難を防ぐ機能を備えた盗難防止ボルトを提供することである。   Accordingly, an object of the present invention is to solve the above-described conventional problems and provide an antitheft bolt that can be tightened with a constant tightening torque using a general-purpose tool and has a function of preventing theft. .

上記課題を解決するためになされた本発明は、ボルト本体と、該ボルト本体の頭部に形成された取付穴に取付けられたねじ部材とからなり、該ねじ部材のねじ部を前記取付穴内に注入した樹脂により保持させたことを特徴とするものである。   The present invention made to solve the above problems comprises a bolt main body and a screw member attached to a mounting hole formed in the head of the bolt main body, and the screw portion of the screw member is placed in the mounting hole. It is characterized by being held by the injected resin.

請求項２記載の発明は、請求項１記載の盗難防止ボルトにおいて、前記ねじ部材はタッピングねじであることを特徴とするものである。   According to a second aspect of the present invention, in the antitheft bolt according to the first aspect, the screw member is a tapping screw.

請求項３記載の発明は、請求項１記載の盗難防止ボルトにおいて、前記ねじ部材と該ボルト本体との間にワッシャを有することを特徴とするものである。   According to a third aspect of the present invention, in the antitheft bolt according to the first aspect, a washer is provided between the screw member and the bolt body.

請求項４記載の発明は、請求項１記載の発明において、前記ボルト本体のねじ部にシール剤を塗布したことを特徴とするものである。   According to a fourth aspect of the present invention, in the first aspect of the present invention, a sealing agent is applied to the thread portion of the bolt body.

請求項１の発明によれば、ボルト本体の頭部に形成された取付穴にねじ部材が取付けられ、樹脂インサート成形によってボルト本体とねじ部材とが一体化されている。これにより、締付時にはねじ部材の締付トルクが樹脂を介してボルト本体に伝達され、ボルト本体をめねじ部材に固定することが可能となる。しかしねじ部材を逆方向に回転させようとすると、ねじ部材のみが樹脂のねじ孔から外れ、ボルト本体はめねじ部材に固定された状態を保持する。この状態となるとボルト本体の上部には工具を係合させる部分がなくなるため、ボルト本体の取外しには時間を要することとなり、盗難を防止することが可能となる。   According to invention of Claim 1, a screw member is attached to the attachment hole formed in the head of a bolt main body, and the bolt main body and the screw member are integrated by resin insert molding. Thus, during tightening, the tightening torque of the screw member is transmitted to the bolt body via the resin, and the bolt body can be fixed to the female thread member. However, when the screw member is rotated in the reverse direction, only the screw member is removed from the screw hole of the resin, and the bolt main body is kept fixed to the female screw member. In this state, since there is no portion for engaging the tool at the upper portion of the bolt body, it takes time to remove the bolt body, and theft can be prevented.

請求項２の発明によれば、ねじ部材が六角頭の構造を有していることから、汎用工具によって安定した締付が可能となる。   According to the invention of claim 2, since the screw member has a hexagonal head structure, it is possible to perform stable tightening with a general-purpose tool.

また請求項３の発明によれば、ワッシャを用いることにより、ねじ部材をボルト本体の取付穴に、より安定に取付けることが可能となる。さらに、ワッシャを使用せず樹脂インサート成形によってねじ部材とボルト本体とを固定した場合と比較して、ワッシャを介すことによりねじ部材とボルト本体との間の摩擦力が軽減し、ねじ部材を弛め方向に回転させた時に、より小さなトルクでねじ部材がボルト本体から外れるようになる。   According to the invention of claim 3, by using the washer, the screw member can be more stably attached to the attachment hole of the bolt body. Furthermore, compared to the case where the screw member and the bolt body are fixed by resin insert molding without using a washer, the frictional force between the screw member and the bolt body is reduced by using the washer, and the screw member is When rotated in the loosening direction, the screw member comes off the bolt body with a smaller torque.

さらに請求項４の発明によれば、ボルト本体のねじ部にシール剤を塗布することにより、めねじ部材への固定強度を増加させることができる。   Furthermore, according to the invention of claim 4, the fixing strength to the female screw member can be increased by applying the sealant to the thread portion of the bolt body.

従来の締付前の首切りボルトを示す斜視図である。It is a perspective view which shows the conventional necking bolt before fastening. 従来の首切りボルトの破断後の状態を示す斜視図である。It is a perspective view which shows the state after the fracture | rupture of the conventional neck cutting bolt. 本発明の実施形態の盗難防止ボルトを示す斜視図である。It is a perspective view which shows the antitheft bolt of embodiment of this invention. 実施形態の盗難防止ボルトの、図６中のＡ−Ｏ−Ｂ断面図である。FIG. 7 is a cross-sectional view of the anti-theft bolt of the embodiment taken along the line A-O-B in FIG. ねじ部材が外れた状態を示す斜視図である。It is a perspective view which shows the state which the screw member removed. 実施形態の盗難防止ボルトの分解図である。It is an exploded view of the antitheft bolt of the embodiment. 樹脂インサート前の状態を示す斜視図である。It is a perspective view which shows the state before resin insert. めねじ部材への取付例を示す、図６中のＡ−Ｏ−Ｂ断面図である。FIG. 7 is a cross-sectional view taken along line AOB in FIG. 6, showing an example of attachment to the female screw member.

以下に本発明の好ましい実施形態を示す。
図３には本発明の実施形態の盗難防止ボルトの斜視図を示し、図４には、図６中のＡ−Ｏ−Ｂ断面図を示す。これらの図において、４はボルト本体、６はその頭部に取付けられたねじ部材である。 Preferred embodiments of the present invention are shown below.
FIG. 3 is a perspective view of the antitheft bolt according to the embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along line A-O-B in FIG. In these drawings, 4 is a bolt body, and 6 is a screw member attached to the head.

ボルト本体４は、ねじ部４ａの上部に胴部４ｂと頭部４ｃとを備えている。胴部４ｂの外側面は、メーカーやディーラーにおいては工具を係合させて取外すことができるようにするため、本実施形態では八角状としたが、工具に係合させることができる形状であればこれに限定されないものとする。頭部４ｃは円形であり、その上面から胴部４ｂに達する取付穴８が形成されている。またねじ部４ａと胴部４ｂとの間には、緩み等の不具合防止のためのワッシャ４ｄを備えている。図４に示すように、この取付穴８の内径はねじ部材６のねじ部６ａの外径よりもやや大きく形成されている。またこの実施形態では、取付穴の上半部は図４、図６に示すように十文字状となっており、ねじ部材６のねじ部６ａとの間に間隙を持たせてある。   The bolt body 4 includes a body portion 4b and a head portion 4c on the upper portion of the screw portion 4a. The outer surface of the body 4b has an octagonal shape in this embodiment so that the manufacturer or dealer can engage and remove the tool, but any shape that can be engaged with the tool is used. It is not limited to this. The head 4c has a circular shape, and a mounting hole 8 that reaches the body 4b from its upper surface is formed. Further, a washer 4d is provided between the threaded portion 4a and the body portion 4b for preventing problems such as loosening. As shown in FIG. 4, the inner diameter of the mounting hole 8 is slightly larger than the outer diameter of the threaded portion 6 a of the screw member 6. In this embodiment, the upper half portion of the mounting hole has a cross shape as shown in FIGS. 4 and 6, and a gap is provided between the screw portion 6 and the screw portion 6 a.

ねじ部材６は鍔６ｃを備えた頭部６ｂと、ねじ部６ａとからなるものである。鍔６ｃの外径はボルト本体４の頭部４ｃよりも小径としておく。また前記取付穴８の深さは、ねじ部材６のねじ部６ａよりも深くしておくものとする。本実施形態では、ねじ部材６は頭部６ｂが六角形状のタッピングねじであるため、六角ソケットレンチやその他の汎用工具による回転が可能である。なお、タッピングねじの他に、六角ボルト等、ねじ部を有し汎用工具で締付可能なねじ部材であれば差し支えないものとする。さらに、頭部６ｂの形状も六角形に限定されず、ドライバで締付可能な任意の溝形状としてもよい。なお図６に示すようにねじ部材６にはワッシャ５を嵌めても差し支えない。   The screw member 6 is composed of a head portion 6b having a flange 6c and a screw portion 6a. The outer diameter of the flange 6c is set smaller than the head 4c of the bolt body 4. Further, the depth of the mounting hole 8 is assumed to be deeper than the screw portion 6a of the screw member 6. In this embodiment, since the screw member 6 is a tapping screw having a hexagonal head 6b, it can be rotated with a hexagon socket wrench or other general-purpose tool. In addition to a tapping screw, a screw member such as a hexagon bolt that has a threaded portion and can be tightened with a general-purpose tool may be used. Furthermore, the shape of the head 6b is not limited to a hexagon, and may be any groove shape that can be tightened with a screwdriver. As shown in FIG. 6, the washer 5 may be fitted to the screw member 6.

図７に示すように、ねじ部材６をボルト本体４の取付穴８の中心に挿入した状態で、取付穴８の内部に樹脂を注入するインサート成形を行い、図４に示すようにねじ部材６のねじ部６ａを取付穴８内に注入した樹脂７により保持させる。またこれと同時に、ボルト本体４の円形頭部４ｃの外周にも樹脂７による環状部７ａを成形する。ただし樹脂７がねじ部材６の鍔６ｃを覆わず、頭部６ｂのみが露出するようにインサート成形を行うものとする。本実施形態では取付穴８の上半部を十文字状としたので、樹脂７の流路を確保することができ、取付穴８の内部全体に樹脂７を充填することができる。   As shown in FIG. 7, with the screw member 6 inserted into the center of the mounting hole 8 of the bolt body 4, insert molding is performed in which a resin is injected into the mounting hole 8. As shown in FIG. Is held by the resin 7 injected into the mounting hole 8. At the same time, an annular portion 7 a made of resin 7 is also formed on the outer periphery of the circular head 4 c of the bolt body 4. However, insert molding is performed so that the resin 7 does not cover the flange 6c of the screw member 6 and only the head 6b is exposed. In the present embodiment, since the upper half of the mounting hole 8 has a cross shape, the flow path of the resin 7 can be secured, and the entire inside of the mounting hole 8 can be filled with the resin 7.

なお、樹脂インサート成形に用いる樹脂７は、例えばナイロン６６（商標登録名）にガラス繊維７０％を添加して強度を持たせたものを使用することができる。樹脂７の種類は必ずしもこれに限定されるものではないが、ねじ部材６に加えられた締付トルクを確実にボルト本体４に伝達できる程度の強度を持つことが必要である。   As the resin 7 used for resin insert molding, for example, nylon 66 (trademark name) added with 70% glass fiber to give strength can be used. The type of the resin 7 is not necessarily limited to this, but it is necessary to have a strength that can reliably transmit the tightening torque applied to the screw member 6 to the bolt body 4.

このように構成された本発明の盗難防止ボルトは、図８に示すように、ボルト本体４によってめねじ部材９に被締付物１０を取付けるために使用されるものであり、汎用工具である六角ソケットレンチ等によってねじ部材６の六角状の頭部６ｂを締付けることで、ねじ部材６と一体化したボルト本体４が締付されることとなり、一定の締付トルクをもってめねじ部材９にボルト本体４を固定することができる。   The antitheft bolt of the present invention configured as described above is a general-purpose tool that is used to attach an object to be tightened 10 to a female screw member 9 by a bolt body 4 as shown in FIG. By tightening the hexagonal head 6b of the screw member 6 with a hexagon socket wrench or the like, the bolt body 4 integrated with the screw member 6 is tightened, and the bolt member 9 is fixed to the female screw member 9 with a certain tightening torque. The main body 4 can be fixed.

またねじ部材６のねじ部６ａは樹脂７により保持されているため、ねじ部材６を逆回転させて弛めようとしたときには、ねじ部材６が樹脂７のねじ孔から外れて図５に示す状態となる。この状態では、汎用工具を用いてボルト本体４の取付穴８や、円形である樹脂７の環状部７ａに弛めトルクをかけてもボルト本体４は外れずにめねじ部材９に保持され、工具を係合させることができる箇所は胴部４ｂのみとなるため、ボルト本体４の取外しには時間がかかることとなり、結果ボルト本体４によってめねじ部材９に取付けた被締付物１０であるキーシリンダ等の盗難を防止することが可能となる。なお、ボルト本体４のねじ部４ａには固定強度を高めるためのシール剤を塗布することも可能である。   Further, since the screw portion 6a of the screw member 6 is held by the resin 7, when the screw member 6 is rotated backward to be loosened, the screw member 6 comes out of the screw hole of the resin 7 and is in the state shown in FIG. It becomes. In this state, even if a loosening torque is applied to the mounting hole 8 of the bolt body 4 or the circular portion 7a of the resin 7 that is circular using a general-purpose tool, the bolt body 4 is held by the female screw member 9 without detaching. Since only the barrel portion 4b can be engaged with the tool, it takes time to remove the bolt main body 4. As a result, the tightened object 10 is attached to the female screw member 9 by the bolt main body 4. It is possible to prevent the theft of the key cylinder or the like. In addition, it is also possible to apply | coat the sealing agent for improving the fixing strength to the thread part 4a of the bolt main body 4. FIG.

１ 円錐状部
２ 頭部
２ａ 破断部
３ おねじ部
４ ボルト本体
４ａ ねじ部
４ｂ 胴部
４ｃ 頭部
４ｄ ワッシャ
５ ワッシャ
６ ねじ部材
６ａ ねじ部
６ｂ 頭部
６ｃ 鍔
７ 樹脂
７ａ 環状部
８ 取付穴
９ めねじ部材
１０ 被締付物 DESCRIPTION OF SYMBOLS 1 Conical part 2 Head part 2a Breaking part 3 Male thread part 4 Bolt main body 4a Screw part 4b Body part 4c Head part 4d Washer 5 Washer 6 Screw member 6a Screw part 6b Head part 6c 鍔 7 Resin 7a Annular part 8 Mounting hole 9 Female thread member 10

Claims (4)

ボルト本体と、該ボルト本体の頭部に形成された取付穴に取付けられたねじ部材とからなり、該ねじ部材のねじ部を前記取付穴内に注入した樹脂により保持させたことを特徴とする盗難防止ボルト。   A theft comprising a bolt body and a screw member attached to a mounting hole formed in the head of the bolt body, wherein the screw portion of the screw member is held by resin injected into the mounting hole. Prevention bolt. 前記ねじ部材はタッピングねじであることを特徴とする請求項１記載の盗難防止ボルト。   The anti-theft bolt according to claim 1, wherein the screw member is a tapping screw. 前記ねじ部材と該ボルト本体との間にワッシャを有することを特徴とする請求項１記載の盗難防止ボルト。   The anti-theft bolt according to claim 1, further comprising a washer between the screw member and the bolt body. 前記ボルト本体のねじ部にシール剤を塗布したことを特徴とする請求項１記載の盗難防止ボルト。   The antitheft bolt according to claim 1, wherein a sealant is applied to a thread portion of the bolt body.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107524687A (en) * 2017-08-25 2017-12-29 柳州市贵高物资有限责任公司 Anti-theft screw
CN108443301A (en) * 2018-05-07 2018-08-24 海盐县宏诚标准件有限公司 A kind of antirust anti-theft screw

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CN107524687A (en) * 2017-08-25 2017-12-29 柳州市贵高物资有限责任公司 Anti-theft screw
CN108443301A (en) * 2018-05-07 2018-08-24 海盐县宏诚标准件有限公司 A kind of antirust anti-theft screw

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