JPH08338416A - Tightening device using bolt and nut - Google Patents
Tightening device using bolt and nutInfo
- Publication number
- JPH08338416A JPH08338416A JP14632895A JP14632895A JPH08338416A JP H08338416 A JPH08338416 A JP H08338416A JP 14632895 A JP14632895 A JP 14632895A JP 14632895 A JP14632895 A JP 14632895A JP H08338416 A JPH08338416 A JP H08338416A
- Authority
- JP
- Japan
- Prior art keywords
- nut
- bolt
- screw
- thread
- diameter
- 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.)
- Granted
Links
Landscapes
- Transmission Devices (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
Description
【０００１】本発明はねじ込み時に、ねじのかみ込み焼
付きを発生させないボルトとナットを用いた締結装置に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastening device using bolts and nuts which do not cause seizure of screws when they are screwed in.
【０００２】[0002]
【従来の技術】雄ねじ５０を雌ねじ５１に螺挿して行う
締結装置においては、図６に示されるように、雄ねじ５
０と雌ねじ５１の中心軸が一致している場合には、雄ね
じ５０が雌ねじ５１に円滑に螺挿されるが、図７に示さ
れるように、雄ねじ５０と雌ねじ５１の中心軸がある角
度α傾いている場合は、Ｆ位置でクロスカットを起こし
てピッチ飛びあるいはピッチ外れとなり、雄ねじ５０の
ねじ山５２と雌ねじ５１のねじ山５３とが干渉して噛み
込み、この状態で螺じ込みが継続されるとクロスカット
部からねじが破損し、遂には焼き付いて雄ねじ５０ある
いは雌ねじ５１のねじ山５２、５３を損傷するという問
題があった。そこで、雄ねじ５０と雌ねじ５１の軸心ず
れを抑えるため、雄ねじ５０の先端を先細案内部とした
り、図８に示されるように、雄ねじ５０の先端にねじ径
より小径の短軸案内部５４を形成して螺じ込み初期にお
いてねじ相互の係合が円滑に行われるようにしたものが
製品化されている。2. Description of the Related Art In a fastening device in which a male screw 50 is screwed into a female screw 51, as shown in FIG.
When the center axes of 0 and the female screw 51 are coincident with each other, the male screw 50 is smoothly inserted into the female screw 51, but as shown in FIG. 7, the central axes of the male screw 50 and the female screw 51 are inclined at an angle α. If it is, the cross cut occurs at the F position and the pitch jumps or becomes out of pitch, and the screw thread 52 of the male screw 50 and the screw thread 53 of the female screw 51 interfere and bite, and the screwing is continued in this state. Then, there is a problem that the screw is broken from the cross-cut portion and finally seized to damage the threads 52 and 53 of the male screw 50 or the female screw 51. Therefore, in order to suppress the axial misalignment between the male screw 50 and the female screw 51, the tip of the male screw 50 is used as a tapered guide portion, or as shown in FIG. 8, a short shaft guide portion 54 having a diameter smaller than the screw diameter is provided at the tip of the male screw 50. A product is formed so that the screws can be smoothly engaged with each other in the initial stage of screwing.
【０００３】しかし、雄ねじ５０の先端に先細案内部や
短軸案内部を設けても、中心軸が傾いて螺挿されるとピ
ッチ外れが生じる傾向があった。即ち、図８に示される
ように、短軸案内部５４を有する雄ねじ５０に対して雌
ねじ５１が雄ねじ５０の螺挿軸と角度α＝３度だけ傾
き、且つ、雌ねじ５１のねじ切上部を図示のＡ、Ｂ、
Ｃ、Ｄのように９０度づつ位相をずらした場合のクロス
カット発生率は、図９に示されるように、雌ねじ５１の
ねじ切上部位置Ｂが最大で、雌ねじ５１の切上部位置Ｄ
が最少であった。図１０には雌ねじ５１の切上部位置Ｂ
で、ピッチ外れが生じて雄ねじ５０の切上部のねじ山５
２と雌ねじ５１のねじ山５３とが図示のＦ１において干
渉し、クロスカットが発生する状況を示す。また、図１
１には雌ねじ５１の切上部位置がＤで、雄ねじ５０の切
上部のねじ山５２と雌ねじ５１のねじ溝が係合するピッ
チの一致した状況を示す。さらに、雄ねじ５０の短軸案
内部５４の外径と雌ねじ５１の内径とのクリアランスを
変化させた場合のクロスカット発生率を示す。このデー
タからクリアランス管理によってクロスカットを抑える
ことは実際上難しいことが判明した。これらの点から、
雄ねじ５０の先端に短軸案内部を形成したり、雄ねじ５
０の短軸案内部５４と雌ねじ５１の内径とのクリアラン
ス管理を行ってもクロスカットの発生を抑制することは
難しいということが判る。However, even if a tapered guide portion or a short-axis guide portion is provided at the tip of the male screw 50, there is a tendency that a pitch deviation occurs when the central axis is screwed and inserted. That is, as shown in FIG. 8, with respect to the male screw 50 having the short-axis guide portion 54, the female screw 51 is inclined with respect to the screw insertion axis of the male screw 50 by an angle α = 3 degrees, and the threaded upper portion of the female screw 51 is shown. A, B,
As shown in FIG. 9, the cross-cut occurrence rate when the phase is shifted by 90 degrees as in C and D is that the screw thread upper position B of the internal thread 51 is the maximum and the internal thread 51 cut-up position D is
Was the least. FIG. 10 shows the upper position B of the internal thread 51.
Then, the pitch deviation occurs and the thread 5 at the upper part of the male screw 50 is cut.
2 and the thread 53 of the female screw 51 interfere with each other at F1 shown in the drawing, and a cross-cut occurs. Also, FIG.
1 shows the situation where the cut-up position of the internal thread 51 is D and the pitch of engagement between the thread 52 of the cut-up part of the external thread 50 and the thread groove of the internal thread 51 is the same. Further, the cross-cut occurrence rate is shown when the clearance between the outer diameter of the short shaft guide portion 54 of the male screw 50 and the inner diameter of the female screw 51 is changed. From this data, it became clear that it is practically difficult to suppress cross-cut by clearance management. From these points,
A short axis guide is formed at the tip of the male screw 50, or the male screw 5
It can be seen that it is difficult to suppress the occurrence of crosscuts even if the clearance between the short axis guide portion 54 of 0 and the inner diameter of the female screw 51 is managed.
【０００４】[0004]
【発明が解決しようとする課題】本発明が解決しようと
するところは前記のような問題を解決し、ボルトの雄ね
じ部とナットの雌ねじの中心軸がある角度傾いている場
合でも、ボルトとナットのねじ山が干渉して噛み込んで
生じるクロスカットの発生を抑制できるボルトとナット
を用いた締結装置を提供することにある。The problem to be solved by the present invention is to solve the above-mentioned problems, and even when the central axes of the male screw portion of the bolt and the female screw of the nut are inclined at an angle, the bolt and the nut are Another object of the present invention is to provide a fastening device using bolts and nuts that can suppress the occurrence of crosscuts that occur when the threads of the two interfere with each other and are bitten.
【０００５】[0005]
【課題を解決するための手段】前記のような課題を解決
した本発明のボルトとナットを用いた締結装置は、雌ね
じが形成されたナット本体の座面側に開口端が雌ねじ径
より大径の偏芯穴ぐり部を設けてその内面の前記雌ねじ
の延長線上にガイドねじ溝を設けたナットと、雄ねじ部
が形成された螺軸部の先端に前記ナットの雌ねじ径より
僅かに小径の案内軸部を連設するとともに前記雄ねじ部
の切上端を鋭い切上げで雄ねじ外径まで立ち上げた急峻
切上部に形成したボルトとよりなることを特徴とするも
のである。In the fastening device using the bolt and the nut of the present invention, which has solved the above-mentioned problems, the opening end on the bearing surface side of the nut body having the internal thread is larger than the internal thread diameter. Of the eccentric hole and a guide screw groove is provided on the inner surface of the female screw on the extension line of the female screw, and a guide having a diameter slightly smaller than the female screw diameter of the nut at the tip of the screw shaft portion having the male screw portion. It is characterized in that it comprises a bolt formed on a steeply cut upper part in which a shaft portion is continuously provided and the cut upper end of the male screw portion is sharply raised to the outer diameter of the male screw.
【０００６】[0006]
【作用】このようなボルトとナットを用いた締結装置
は、ボルトとナットの中心軸のずれが大きい状態でナッ
トにボルトがねじ込まれた場合、ボルトは先ずその案内
軸部の先端がナット本体の偏心穴ぐり部に当り、案内軸
部が雌ねじ内に進入し、続いて、雌ねじの内径との間に
僅かなクリアランスをもつ案内軸部によりボルトとナッ
トの中心軸のずれはさらに補正される。そして、ボルト
の回転がさらに進むと雄ねじ部の急峻切上部が偏心穴ぐ
り部の内面により案内されて１回転するまでの間にナッ
ト本体の雌ねじの延長線上において偏心穴ぐり部の内面
に設けられているガイドねじ溝に係合したうえナット本
体の雌ねじに向けガイドされて螺合してゆき、ボルトは
ナットの対する円滑な螺合が行われることとなる。In the fastening device using such a bolt and nut, when the bolt is screwed into the nut in a state where the center axes of the bolt and the nut are largely displaced, the bolt first has its guide shaft portion whose tip is of the nut body. Upon hitting the eccentric boring portion, the guide shaft portion enters into the internal thread, and subsequently, the deviation of the central axes of the bolt and the nut is further corrected by the guide shaft portion having a slight clearance from the inner diameter of the internal thread. When the bolt further rotates, the steeply cut upper part of the male screw portion is guided by the inner surface of the eccentric hole drilling portion and is provided on the inner surface of the eccentric hole drilling portion on the extension line of the female screw of the nut body until it makes one rotation. The bolt is engaged with the guide screw groove formed therein and is guided by the female screw of the nut main body to be screwed, whereby the bolt is smoothly screwed with the nut.
【０００７】[0007]
【実施例】次に、本発明を図示の実施例に基づいて詳細
に説明する。１はナット、１１はこのナットに螺合され
て締結装置を構成するボルトである。ナット１はフラン
ジ付き六角ナットなどの一般ナットの外、溶接ナット等
の特殊ナットでもよいが、いずれの場合でもナット本体
２の座面側には雌ねじ３の雌ねじ径より大径とした開口
端がナット本体２の中心軸とは偏芯している偏心穴ぐり
部４をその少なくとも脚端の一部が雌ねじ３に続くよう
に設けてあり、この偏心穴ぐり部４の内面は開口端に向
かうにつれて拡径されるテーパ面に形成されてその開口
端には面取部５を続かせてある。また、前記偏心穴ぐり
部４の内面のテーパ面のうち前記雌ねじ３の延長線上に
はこの雌ねじ３に螺挿されるボルト１１の螺軸部１２に
形成してある雄ねじ部１３の切上端を係合させたうえ雌
ねじ３に送り込むガイドねじ溝６が前記雌ねじ３とは分
離しているがピッチを一致させて設けてある。一方、こ
のナット１にねじ込まれる前記ボルト１１はナット１の
雌ねじ３に対応する雄ねじ部１３が形成されている螺軸
部１２の先端に雄ねじ部１３の谷径より僅かに小径でナ
ット１の雌ねじ３に螺合されたときその雌ねじとの間に
僅かなクリアランス（０．４３ｍｍ以下）をもたせるよ
うにした短い直棒状の案内軸部１４を連設したもので、
螺軸部１２の雄ねじ部１３の切上端は鋭い切上げで且つ
急峻に雄ねじ外径まで立ち上げた急峻切上部１３ａに形
成してある。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the illustrated embodiments. Reference numeral 1 is a nut, and 11 is a bolt which is screwed to the nut and constitutes a fastening device. The nut 1 may be a general nut such as a hexagonal nut with a flange, or a special nut such as a weld nut, but in any case, the seat surface side of the nut body 2 has an open end larger than the female screw diameter of the female screw 3. An eccentric hole counterbore 4 which is eccentric with respect to the central axis of the nut body 2 is provided so that at least a part of its leg end continues to the female screw 3, and the inner surface of this eccentric hole counterbore 4 faces the open end. The chamfered portion 5 is formed at the open end of the taper surface so that the diameter is increased accordingly. Further, on the extension line of the female screw 3 of the tapered surface of the inner surface of the eccentric hole drilling portion 4, the cut upper end of the male screw portion 13 formed on the screw shaft portion 12 of the bolt 11 screwed into the female screw 3 is engaged. The guide screw groove 6 which is fitted and fed into the female screw 3 is separated from the female screw 3 but is provided with the same pitch. On the other hand, the bolt 11 screwed into the nut 1 has a male screw portion 13 corresponding to the female screw 3 of the nut 1 at the tip of a screw shaft portion 12 having a diameter slightly smaller than the root diameter of the male screw portion 13 and the female screw of the nut 1. A short straight rod-shaped guide shaft portion 14 is continuously provided so as to have a slight clearance (0.43 mm or less) between the female screw and the female screw when screwed into 3.
The upper end of the external thread portion 13 of the screw shaft portion 12 is formed so as to be sharply upright and sharply up to the outer diameter of the external thread 13a.
【０００８】このように構成されたものは、ボルト１１
とナット１とによって被締付部材を螺着する際におい
て、ボルト１１とナット１との中心軸が大きくずれた状
態でボルト１１のナット１に対するねじ込みが電動レン
チ等により行われると、回転されるボルト１１はその先
端にある直棒状の案内軸部１４とナット本体２の座面側
に形成された偏心穴ぐり部４の内面のテーパ面との当接
により先ず中心軸のずれが補正され、ボルト１１の案内
軸部１４がナット１の雌ねじ３に挿入されるが、この案
内軸部１４とナット本体２の雌ねじ３の内径との間には
わずかなクリアランスしかないため、案内軸部１４が雌
ねじ３に進入するにつれボルト１１とナット１との中心
軸のずれはさらに補正され、ついには雄ねじ部１３の切
上端が偏心穴ぐり部４の面取部５に当接することとな
る。The structure of the bolt 11
When the member to be tightened is screwed by the nut 1 and the nut 1, when the bolt 11 is screwed into the nut 1 with an electric wrench or the like while the center axes of the bolt 11 and the nut 1 are largely displaced, the bolt 11 is rotated. The bolt 11 is first corrected for the deviation of the central axis by the contact between the straight rod-shaped guide shaft portion 14 at the tip thereof and the taper surface of the inner surface of the eccentric hole drilling portion 4 formed on the seat surface side of the nut body 2, The guide shaft portion 14 of the bolt 11 is inserted into the female screw 3 of the nut 1, but since there is only a slight clearance between the guide shaft portion 14 and the inner diameter of the female screw 3 of the nut body 2, the guide shaft portion 14 is The deviation of the central axes of the bolt 11 and the nut 1 is further corrected as the screw 3 enters the female screw 3, and finally the cut upper end of the male screw portion 13 comes into contact with the chamfered portion 5 of the eccentric bored portion 4.
【０００９】そして、ボルト１１が１回転するまでの間
にボルト１１の螺軸部１２に形成してある雄ねじ部１３
の切上端である鋭い切上げで且つ急峻に雄ねじ外径まで
立ち上げた急峻切上部１３ａが偏芯穴ぐり部４の内面の
テーパ面にガイドされつつ前記雌ねじ３の延長線上にお
いてこの偏芯穴ぐり部４の内面に設けてあるガイドねじ
溝６に係合したうえ、さらに続くボルト１の回転で急峻
切上部１３ａはガイドねじ溝６にガイドされつつこのガ
イドねじ溝６とピッチが同じ雌ねじ３に導かれて正常の
ねじ込みが行われることとなるので、ボルト１にクロス
カットを生じることなく被締付部材の締付が完了するこ
ととなる。なお、実施例では雌ねじ３の谷底をナット本
体２の座面から約１ピッチの位置としてあるが、図３に
示されるように、雌ねじ３の山頂が座面から１ピッチの
位置にある場合には、雄ねじ部１３の急峻切上部１３ａ
が偏心穴ぐり部４の内面のテーパ面によってわずかに上
昇するか、雄ねじ部１３の急峻切上部１３ａが雌ねじ３
に落ち込むようにして係合したうえ正常のねじ込みが行
われることとなる。The male screw portion 13 formed on the screw shaft portion 12 of the bolt 11 until the bolt 11 makes one rotation.
On the extension line of the female screw 3, the upper part 13a of the eccentric hole which is the sharp upper end of the eccentric hole and which is steeply raised to the outer diameter of the external thread is guided by the taper surface of the inner surface of the eccentric hole counterbore 4. In addition to engaging with the guide screw groove 6 provided on the inner surface of the portion 4, the steep-cut upper portion 13a is guided by the guide screw groove 6 by the further rotation of the bolt 1 and the female screw 3 having the same pitch as the guide screw groove 6 is formed. Since the screw is guided and screwed normally, the tightening of the member to be tightened is completed without the cross cut of the bolt 1. In the embodiment, the root of the internal thread 3 is located at a position approximately 1 pitch from the seat surface of the nut body 2. However, as shown in FIG. 3, when the crest of the internal thread 3 is located 1 pitch from the seat surface. Is a steep-cutting upper portion 13a of the male screw portion 13.
Slightly rises due to the tapered surface of the inner surface of the eccentric boring portion 4, or the steeply cut upper portion 13a of the male screw portion 13 has the female screw 3
The normal screwing will be performed after the engagement is made so as to fall into the.
【００１０】なお、前記実施例では偏芯穴ぐり部４の内
面の全面が開口端に向かうにつれて拡径されるテーパ面
に形成されて偏芯穴ぐり部４によるボルト傾き補正機能
を特に優れたものとしているが、偏芯穴ぐり部４の内面
に前記雌ねじ３の延長線上においてボルトの雄ねじ部１
３の切上端が係合したうえ雌ねじ３に送り込むガイドね
じ溝６を設けたものであれば必ずしも偏芯穴ぐり部４の
内面の全てをテーパ面としてガイドねじ溝６を雌ねじ３
と分離させなくてもよい。In the above embodiment, the entire inner surface of the eccentric hole bore portion 4 is formed into a tapered surface whose diameter increases toward the opening end, so that the eccentric hole bore portion 4 has a particularly excellent bolt inclination correcting function. However, on the inner surface of the eccentric hole drilling portion 4 on the extension line of the female screw 3, the male screw portion 1 of the bolt is formed.
If the cut upper end of 3 is engaged and the guide screw groove 6 for feeding into the female screw 3 is provided, the inner surface of the eccentric hole drilling portion 4 is necessarily a tapered surface, and the guide screw groove 6 is used as the female screw 3.
Does not have to be separated.
【００１１】[0011]
【発明の効果】本発明は前記説明によって明らかなよう
に、座面側に設けた偏芯穴ぐり部の内面に雌ねじの延長
線上においてガイドねじ溝を設けたナットと、螺軸部の
先端にナットの雌ねじ径より僅かに小径の案内軸部を連
設するとともに雄ねじ部の切上端を鋭い切上げの急峻切
上部に形成したボルトとにより被締付部材を締結するよ
うにした締結装置であるから、正常なねじ込みが行われ
ずにボルトの雄ねじ部とナットの雌ねじの中心軸がある
角度傾いてねじ込まれたときには、このナットとボルト
との中心軸の傾きがボルトの先端に形成してある案内軸
部の先端と偏心穴ぐり部との当接によるガイド機能で先
ず補正されたうえ、雌ねじとの間に僅かなクリアランス
しか生じない案内軸部の修正機能とにより的確に補正さ
れ、ピッチのずれは雄ねじ部の切上端である鋭い切上げ
の急峻切上部と偏心穴ぐり部に形成されたガイドねじ溝
との係合により補正されて雌ねじに対するピッチ合わせ
が行われたうえ円滑に螺合することとなり、ボルトとナ
ットのねじ山が干渉して噛み込むことがなくなるのでク
ロスカットを生じることなく確実な締付を行うことがで
きる。従って、本発明は従来の問題点を解決した締結装
置として業界の発展に寄与するところ極めて大なもので
ある。As is apparent from the above description, the present invention has a nut provided with a guide screw groove on the extension line of the female screw on the inner surface of the eccentric hole bored portion provided on the seat surface side, and the tip of the screw shaft portion. This is a fastening device in which a guide shaft portion having a diameter slightly smaller than the female thread diameter of the nut is continuously provided, and the fastening upper end of the male thread portion is fastened with a bolt formed on a sharply cut-up steep upper part. , If the central axis of the male thread of the bolt and the central axis of the female thread of the nut are screwed at an angle without proper screwing, the inclination of the central axis of the nut and the bolt is formed at the tip of the bolt. First, it is corrected by the guide function by the contact between the tip of the section and the eccentric hole, and then it is corrected accurately by the correction function of the guide shaft that produces only a slight clearance with the female screw, and the pitch shift. It is corrected by the engagement of the steeply cut-up steep upper part which is the upper cut end of the male screw part and the guide screw groove formed in the eccentric hole drilling part, and the pitch is adjusted with respect to the female screw, and it will be screwed smoothly. Since the threads of the bolt and the nut do not interfere with each other and are not bitten, reliable tightening can be performed without causing a cross cut. Therefore, the present invention is extremely significant in that it contributes to the development of the industry as a fastening device that solves the conventional problems.
【図１】本発明の実施例を分離して示す一部切欠斜視図
である。FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention separately.
【図２】本発明の実施例の一部切欠断面図である。FIG. 2 is a partially cutaway sectional view of an embodiment of the present invention.
【図３】本発明の雌ねじ切上げ位置が異なる実施例を示
す一部切欠断面図である。FIG. 3 is a partially cutaway cross-sectional view showing an embodiment of the present invention in which a female screw raising position is different.
【図４】本発明の実施例のナットの平面図である。FIG. 4 is a plan view of the nut according to the embodiment of the present invention.
【図５】本発明の実施例における案内軸部と内径とのク
リアランスを変えた場合のクロスカット発生率を示すグ
ラフである。FIG. 5 is a graph showing a cross-cut occurrence rate when the clearance between the guide shaft portion and the inner diameter is changed in the embodiment of the present invention.
【図６】従来のボルトとナットを用いた締結装置の正常
な螺挿状態を示す断面図である。FIG. 6 is a cross-sectional view showing a normal screwing state of a fastening device using a conventional bolt and nut.
【図７】従来のボルトとナットを用いた締結装置のクロ
スカット発生状況を示す断面図である。FIG. 7 is a cross-sectional view showing a cross-cut occurrence state of a fastening device using a conventional bolt and nut.
【図８】従来のボルトとナットを用いた締結装置におけ
る螺軸部に案内軸部を設けて傾いた雌ねじに螺挿される
状態を示す側面図である。FIG. 8 is a side view showing a state in which a guide shaft portion is provided in a screw shaft portion in a conventional fastening device using a bolt and a nut and the guide shaft portion is screwed into an inclined female screw.
【図９】図８のボルトとナットを用いた締結装置におけ
る雌ねじの切上部位置のずれによるクロスカット発生率
を示すグラフである。9 is a graph showing a cross-cut occurrence rate due to a shift in the position of the upper part of the internal thread of the fastening device using the bolt and nut of FIG.
【図１０】図８の雌ねじの切上部位置Ｂにおいてクロス
カット発生状況を示す断面図である。FIG. 10 is a cross-sectional view showing a cross-cut occurrence state at the upper cutting position B of the internal thread of FIG.
【図１１】図８の雌ねじの雌ねじ切上部位置Ｄにおいて
ねじピッチが一致した状態を示す断面図である。FIG. 11 is a cross-sectional view showing a state where the screw pitches match at the internal thread cutting upper position D of the internal thread of FIG.
【図１２】図８のボルトとナットを用いた締結装置にお
ける案内軸部と内径とのクリアランスを変えた場合のク
ロスカット発生率を示すグラフである。12 is a graph showing the cross-cut occurrence rate when the clearance between the guide shaft portion and the inner diameter is changed in the fastening device using the bolt and nut of FIG.
１ ナット ２ ナット本体 ３ 雌ねじ ４ 偏心穴ぐり部 ５ 面取部 ６ ガイドねじ溝 11 ボルト 12 螺軸部 13 雄ねじ部 13a 急峻切上部 14 案内軸部 1 Nut 2 Nut Body 3 Female Thread 4 Eccentric Bore Part 5 Chamfer 6 Guide Screw Groove 11 Bolt 12 Screw Shaft 13 Male Thread 13a Steep Cutting Top 14 Guide Shaft
Claims (3)
の座面側に開口端が雌ねじ径より大径の偏芯穴ぐり部
(4) を設けてその内面の前記雌ねじ(3) の延長線上にガ
イドねじ溝(6) を設けたナット(1) と、雄ねじ部(13)が
形成された螺軸部(12)の先端に前記ナットの雌ねじ径よ
り僅かに小径の案内軸部(14)を連設するとともに前記雄
ねじ部(13)の切上端を鋭い切上げで雄ねじ外径まで立ち
上げた急峻切上部(13a) に形成したボルト(11)とよりな
ることを特徴とするボルトとナットを用いた締結装置。1. A nut body (2) having an internal thread (3) formed therein.
Eccentric bored part with open end larger than female thread diameter on seat surface side of
(4) and a nut (1) provided with a guide screw groove (6) on the extension line of the female screw (3) on the inner surface of the nut (1) and the tip of a screw shaft portion (12) formed with a male screw portion (13). A guide shaft portion (14) slightly smaller than the female thread diameter of the nut is continuously connected to the nut, and the cut upper end of the male thread portion (13) is formed in a steep cut upper part (13a) that is raised up to the outer diameter of the male thread by sharply rounding up. A fastening device using a bolt and a nut, characterized in that the fastening device comprises a bolt (11).
うにつれて拡径されるテーパ面に形成されていてガイド
ねじ溝(6) が雌ねじ(3) と分離されている請求項１に記
載のボルトとナットを用いた締結装置。2. The eccentric boring part (4) has an inner surface formed into a tapered surface whose diameter increases toward the opening end, and the guide screw groove (6) is separated from the female screw (3). A fastening device using the bolt and nut according to 1.
(5) を続かせてある請求項１または２に記載のボルトと
ナットを用いた締結装置。3. A chamfered portion on the opening end face of the eccentric hole drilling portion (4).
The fastening device using the bolt and the nut according to claim 1 or 2, wherein (5) is continued.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7146328A JP3048317B2 (en) | 1995-06-13 | 1995-06-13 | Bolt and fastening device using this bolt and nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7146328A JP3048317B2 (en) | 1995-06-13 | 1995-06-13 | Bolt and fastening device using this bolt and nut |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08338416A true JPH08338416A (en) | 1996-12-24 |
| JP3048317B2 JP3048317B2 (en) | 2000-06-05 |
Family
ID=15405202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7146328A Expired - Lifetime JP3048317B2 (en) | 1995-06-13 | 1995-06-13 | Bolt and fastening device using this bolt and nut |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3048317B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000145741A (en) * | 1998-11-12 | 2000-05-26 | Sugiura Seisakusho:Kk | Male screw member and its manufacture |
| JP2001090721A (en) * | 1999-09-24 | 2001-04-03 | Sugiura Seisakusho:Kk | Nut |
| JP2001099119A (en) * | 1999-09-30 | 2001-04-10 | Sugiura Seisakusho:Kk | Screwing unit of female screw member and male screw member |
| JP2003176809A (en) * | 2001-12-11 | 2003-06-27 | Meidoo:Kk | Bolt and production die |
| JP2004116771A (en) * | 2002-09-27 | 2004-04-15 | Meidoo:Kk | Bolt and fabrication die |
| JP5936022B1 (en) * | 2015-11-10 | 2016-06-15 | Ｒｔｂ株式会社 | P cone fitting |
-
1995
- 1995-06-13 JP JP7146328A patent/JP3048317B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000145741A (en) * | 1998-11-12 | 2000-05-26 | Sugiura Seisakusho:Kk | Male screw member and its manufacture |
| JP2001090721A (en) * | 1999-09-24 | 2001-04-03 | Sugiura Seisakusho:Kk | Nut |
| JP2001099119A (en) * | 1999-09-30 | 2001-04-10 | Sugiura Seisakusho:Kk | Screwing unit of female screw member and male screw member |
| JP2003176809A (en) * | 2001-12-11 | 2003-06-27 | Meidoo:Kk | Bolt and production die |
| JP2004116771A (en) * | 2002-09-27 | 2004-04-15 | Meidoo:Kk | Bolt and fabrication die |
| JP5936022B1 (en) * | 2015-11-10 | 2016-06-15 | Ｒｔｂ株式会社 | P cone fitting |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3048317B2 (en) | 2000-06-05 |
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