JPH0527322U - Neck breakable bolt - Google Patents
Neck breakable boltInfo
- Publication number
- JPH0527322U JPH0527322U JP7407291U JP7407291U JPH0527322U JP H0527322 U JPH0527322 U JP H0527322U JP 7407291 U JP7407291 U JP 7407291U JP 7407291 U JP7407291 U JP 7407291U JP H0527322 U JPH0527322 U JP H0527322U
- Authority
- JP
- Japan
- Prior art keywords
- neck
- bolt
- neck portion
- screw
- broken
- 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.)
- Withdrawn
Links
Landscapes
- Dowels (AREA)
Abstract
(57)【要約】
【目的】 折損した場合でも、後の抜き取りを容易に行
なうことのできる首折れ対応ボルトを提供することを目
的とする。
【構成】 ネジ部１１ａ、首部１１ｂ、頭部１１ｃから
なるボルトの首部１１ｂに軸方向に伸びるノッチ１１
ｄ，１１ｅを刻設して、折損部にはノッチ１１ｄ，１１
ｅが表面に臨むように構成し、これらノッチ１１ｄ，１
１ｅを利用してネジ部１１ａを回動し得るようにしたも
のである。
(57) [Summary] [Purpose] An object of the present invention is to provide a neck-breakable bolt that can be easily removed later even if it is broken. [Structure] A notch 11 extending axially in a neck portion 11b of a bolt including a screw portion 11a, a neck portion 11b, and a head portion 11c.
d and 11e are engraved, and the notches 11d and 11 are formed in the broken portion.
e so as to face the surface, and these notches 11d, 1
The screw portion 11a can be rotated by using 1e.
Description
【０００１】[0001]
本考案は首折れ対応ボルトに関する。 The present invention relates to a neck breakable bolt.
【０００２】[0002]
図３（ａ）は従来技術に係るボルトを示す正面図である。同図に示すように、 このボルト１は、雄ネジが形成されたネジ部１ａ、このネジ部１ａに連続するシ ャフト部である首部１ｂ、及び首部１ｂに連続する頭部１ｃを有しており、パネ ル２等の締付部材に穿設した孔を貫通し、パネル２に対し頭部１ｃと反対側でネ ジ部１ａに螺合するウェルドナット（図示せず）と共働してパネル２を締付・固 定するようになっている。このボルトの締付けには、締付最大トルクの規制、所 謂締付規制があるのが一般的である。 FIG. 3A is a front view showing a bolt according to the related art. As shown in the figure, this bolt 1 has a screw portion 1a formed with a male screw, a neck portion 1b which is a shaft portion continuous with the screw portion 1a, and a head portion 1c continuous with the neck portion 1b. And works together with a weld nut (not shown) that penetrates through a hole formed in the fastening member such as the panel 2 and is screwed into the screw portion 1a on the side opposite to the head portion 1c with respect to the panel 2. Panel 2 is designed to be tightened and fixed. The tightening of the bolt is generally restricted by the maximum tightening torque, so-called tightening restriction.
【０００３】[0003]
上述の如きボルト１は、車両の生産時にも多用されており、この生産時にはボ ルト１の締付規制内のトルクで締めているが、市場に出た後は、人が工具を使っ てボルト１を締めることが多く、この場合には、締付規制のトルク以上のトルク でボルト１を締付ける場合も多々あり、場合によっては、図３（ｂ）に示すよう に、ボルト１の首部１ｂの折損を生起していた。 The bolt 1 as described above is often used during the production of a vehicle, and the bolt 1 is tightened with the torque within the tightening regulations of the bolt 1 at the time of production. The bolt 1 is often tightened, and in this case, the bolt 1 is often tightened with a torque equal to or higher than the tightening regulation torque. In some cases, as shown in FIG. It caused a break.
【０００４】 図３（ｂ）に示すような、ボルト１の折損を生起した場合、ウェルドナット３ 側が開放されている場合には、ネジ部１ａを直接回わしてウェルドナット３に螺 合しているネジ部１ａを抜き取り、ウェルドナット３側が開放されていない場合 にはボルト１の折損部分をドリルでもんでネジ部１ａを抜き取っていた。したが って、何れにしてもネジ部１ａの抜き取り、特に後者の場合の抜き取りに手間が かかるという問題があった。As shown in FIG. 3B, when the bolt 1 is broken and the weld nut 3 side is open, the screw portion 1 a is directly turned and screwed into the weld nut 3. When the weld nut 3 side is not opened, the screw portion 1a is removed, and the broken portion of the bolt 1 is drilled to remove the screw portion 1a. Therefore, in any case, there is a problem that it takes time to extract the screw portion 1a, particularly in the latter case.
【０００５】 本考案は、上記従来技術に鑑み、折損した場合でも、後の抜き取りを容易に行 なうことのできる首折れ対応ボルトを提供することを目的とする。The present invention has been made in view of the above-described conventional art, and an object thereof is to provide a neck breakage-corresponding bolt that can be easily removed later even when it is broken.
【０００６】[0006]
上記目的を達成する本発明の構成は、 The configuration of the present invention to achieve the above object,
【０００７】 雄ネジが形成されたネジ部、このネジ部に連続するシャフト部である首部、及 びこの首部に連続する頭部を有するボルトにおいて、 前記首部の軸方向に伸びるノッチを首部の周方向に亘り複数個形成したことを 特徴とする。In a bolt having a threaded portion formed with a male screw, a neck portion which is a shaft portion continuing to the threaded portion, and a head portion continuing to the neck portion, a notch extending in the axial direction of the neck portion is provided with a notch extending around the neck portion. It is characterized in that a plurality of them are formed in the direction.
【０００８】[0008]
上記構成の本考案によれば、折損した場合、パネル等の締付部材の表面側には ノッチが臨んでいるので、このノッチを利用してネジ部を回わすことにより、こ のネジ部を前記締付部材から抜き取ることができる。 According to the present invention having the above-described structure, since a notch is exposed on the surface side of the fastening member such as the panel when broken, the screw portion is turned by using the notch to turn the screw portion. It can be pulled out from the tightening member.
【０００９】[0009]
以下本考案の実施例を図面と基づき詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
【００１０】 図１に示すように、本実施例に係る首折れ対応ボルト１１も、従来技術に係る ボルト１と同様に、ネジ部１１ａ、首部１１ｂ及び頭部１１ｃを有しているが、 これらの他に、その首部１１ｂには軸方向に伸びるノッチ１１ｄ，１１ｅを周方 向に亘り２個形成してある。これらノッチ１１ｄ，１１ｅは、図１（ａ）のＡ− Ａ線断面図である図１（ｂ）を参照すれば明らかな通り、周方向に関し１８０° 異なる位置にそれぞれ刻設してある。As shown in FIG. 1, the neck-breakable bolt 11 according to the present embodiment also has a screw portion 11 a, a neck portion 11 b, and a head portion 11 c like the bolt 1 according to the related art. Besides, two notches 11d and 11e extending in the axial direction are formed in the neck portion 11b in the circumferential direction. As is apparent from FIG. 1B which is a cross-sectional view taken along the line AA of FIG. 1A, these notches 11d and 11e are engraved at positions different by 180 ° in the circumferential direction.
【００１１】 上記実施例において、締付け時に折損した場合には、図２（ａ）に示すように 、パネル２等の締付部材の表面側にはノッチ１１ｄ，１１ｅが臨んでいるので、 このノッチ１１ｄ，１１ｅを利用してネジ部１１ａを回わすことにより、このネ ジ部１１ａをパネル２から抜き取ることができる。In the above-described embodiment, when the breakage occurs at the time of tightening, as shown in FIG. 2A, the notches 11d and 11e are exposed on the surface side of the tightening member such as the panel 2. By rotating the screw portion 11a using 11d and 11e, the screw portion 11a can be pulled out from the panel 2.
【００１２】 このとき、図２（ｂ）に示すような抜き取り治具４を使用すれば便利である。 この抜き取り治具４は、首部１１ｂ及び頭部１１ｃと同様の首部４ａ及び頭部４ ｂを有するとともに、首部４ａの先端部にノッチ１１ｄ，１１ｅに挿入し得る突 起４ｃ，４ｄを有するものである。かくして、突起４ｃ，４ｄをノッチ１１ｄ， １１ｅに挿入して頭部４ｂを回せば簡単にネジ部１１ａを回転させることができ る。At this time, it is convenient to use the extraction jig 4 as shown in FIG. 2B. This extraction jig 4 has a neck portion 4a and a head portion 4b similar to the neck portion 11b and a head portion 11c, and also has protrusions 4c and 4d which can be inserted into the notches 11d and 11e at the tip portion of the neck portion 4a. is there. Thus, the screw portion 11a can be easily rotated by inserting the protrusions 4c and 4d into the notches 11d and 11e and rotating the head portion 4b.
【００１３】[0013]
以上実施例とともに具体的に説明したように、本考案によれば、折損してもノ ッチを利用してネジ部を頭部側から回わすことができるので、ネジ部の抜き取り 作業の簡略化・迅速化を達成し得る。 According to the present invention, the screw part can be turned from the head side using the notch even if it is broken, as described in detail with the embodiments above. Can be achieved.
【図１】実施例に係る首折れ対応ボルトを示す正面図
（図１（ａ））と、そのＡ−Ａ線断面図（図１（ｂ））
である。FIG. 1 is a front view (FIG. 1 (a)) showing a neck-breaking bolt according to an embodiment and a cross-sectional view taken along the line AA (FIG. 1 (b)).
Is.
【図２】折損時の実施例の状態を示す斜視図（図２
（ａ））と、抜き取り治具との関係を示す説明図（図２
（ｂ））である。FIG. 2 is a perspective view showing a state of the embodiment when broken (FIG.
(A)) and explanatory drawing which shows the relationship between the extraction jig (FIG. 2).
(B)).
【図３】従来技術に係るボルトを示す正面図（図３
（ａ））と、その折損時の態様を示す正面図（図３
（ｂ）である。FIG. 3 is a front view showing a bolt according to the related art (FIG.
(A)) and the front view (FIG. 3) which shows the mode at the time of breakage.
It is (b).
１１ 首折れ対応ボルト １１ａ ネジ部 １１ｂ 首部 １１ｃ 頭部 １１ｄ，１１ｅ ノッチ 11 Neck breakable bolt 11a Screw part 11b Neck part 11c Head part 11d, 11e Notch
Claims (1)
に連続するシャフト部である首部、及びこの首部に連続
する頭部を有するボルトにおいて、 前記首部の軸方向に伸びるノッチを首部の周方向に亘り
複数個形成したことを特徴とする首折れ対応ボルト。1. A bolt having a threaded portion formed with a male screw, a neck portion which is a shaft portion continuing from the threaded portion, and a head portion continuing from the neck portion, wherein a notch extending in the axial direction of the neck portion is formed in the neck portion. A neck breaking bolt characterized in that a plurality of bolts are formed in the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7407291U JPH0527322U (en) | 1991-09-13 | 1991-09-13 | Neck breakable bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7407291U JPH0527322U (en) | 1991-09-13 | 1991-09-13 | Neck breakable bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0527322U true JPH0527322U (en) | 1993-04-09 |
Family
ID=13536613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7407291U Withdrawn JPH0527322U (en) | 1991-09-13 | 1991-09-13 | Neck breakable bolt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0527322U (en) |
-
1991
- 1991-09-13 JP JP7407291U patent/JPH0527322U/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19951130 |