JPH04244616A - Device for preventing bolt from rotating together - Google Patents
Device for preventing bolt from rotating togetherInfo
- Publication number
- JPH04244616A JPH04244616A JP2533491A JP2533491A JPH04244616A JP H04244616 A JPH04244616 A JP H04244616A JP 2533491 A JP2533491 A JP 2533491A JP 2533491 A JP2533491 A JP 2533491A JP H04244616 A JPH04244616 A JP H04244616A
- Authority
- JP
- Japan
- Prior art keywords
- bolt
- washer
- circular hole
- fastened
- convex portion
- 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
- 230000002265 prevention Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 abstract description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Landscapes
- Bolts, Nuts, And Washers (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は、ボルト類の共回り防止
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 device for preventing bolts from rotating together.
【0002】0002
【従来の技術】従来、被締結部材に非円形の孔を形成し
、ボルトの胴部に非円形の孔の隅部等と係合する係合部
を設けて共回りを防止したものがある。[Prior Art] Conventionally, there is a bolt that prevents co-rotation by forming a non-circular hole in a fastened member and providing an engaging portion in the body of the bolt that engages with a corner of the non-circular hole. .
【0003】0003
【考案が解決しようとする課題】被締結部材に非円形の
孔を形成する方式は、孔加工が容易でなく、プレスの打
抜き加工が採用できる場合は少ない。一般に、ボルトを
挿通する孔は、ドリルであけているのが殆どである。し
かし、ドリルであけ得る孔は円形であるため、ボルトの
胴部に係合部を形成しておいても、係合部が係合されな
いため、ボルトの共回りが防止できない。そのため、従
来では、ボルトの頭部をスパナで固定しながらナットを
回して締結しなければならなかった。この作業は、不安
定な建築現場や片手だけしか使用できない場所等では、
非常に危険であり、困難をともなっていた。[Problems to be solved by the invention] In the method of forming a non-circular hole in a member to be fastened, it is not easy to form the hole, and there are few cases where press punching can be employed. Generally, most holes for inserting bolts are made with a drill. However, since the hole that can be drilled with a drill is circular, even if the engaging portion is formed in the body of the bolt, the engaging portion is not engaged, and therefore, the bolts cannot be prevented from rotating together. Therefore, in the past, it was necessary to tighten the bolt by turning the nut while fixing the head of the bolt with a spanner. This work cannot be performed at unstable construction sites or in places where only one hand can be used.
It was extremely dangerous and difficult.
【0004】本発明は、従来技術の上記問題点に鑑みて
提案されたもので、その目的とするところは、円形の孔
に使用することができる共回りを確実に防止し得るボル
ト類の共回り防止装置を提供しようとするものである。The present invention has been proposed in view of the above-mentioned problems of the prior art, and its object is to provide common bolts that can be used in circular holes and can reliably prevent common rotation. The present invention aims to provide a rotation prevention device.
【0005】[0005]
【課題を解決するための手段】上記目的を達成するため
、請求項1の発明は、ボルト又はナットへの係合部を有
し、内周の1個所に被締結部材の円形孔とボルト胴部と
の隙間内に挿入される凸部を有する可動ワッシャと、内
周の2個所に被締結部材の円形孔とボルト胴部との隙間
内に挿入される凸部を有する固定ワッシャとからなり、
可動ワッシャの凸部を固定ワッシャの凸部間に位置させ
て組合せ使用するものである。[Means for Solving the Problems] In order to achieve the above object, the invention of claim 1 has an engaging portion for a bolt or a nut, and a circular hole of a member to be fastened and a bolt body at one location on the inner periphery. It consists of a movable washer that has a convex part that is inserted into the gap between the bolt body and the fixed washer that has convex parts that are inserted into the gap between the circular hole of the member to be fastened and the bolt body at two locations on the inner periphery. ,
The convex portion of the movable washer is positioned between the convex portions of the fixed washer for use in combination.
【0006】請求項2の発明は、ボルト又はナットの係
合部を上面に有し、内周の1個所に被締結部材の円形孔
とボルト胴部との隙間内に挿入される凸部を有する可動
ワッシャと、内周の1個所に被締結部材への円形孔とボ
ルト胴部との隙間内に挿入される凸部を有する固定ワッ
シャとからなり、可動ワッシャの凸部と固定ワッシャの
凸部とを軸方向に離間させて組合せ使用するものである
。[0006] The invention of claim 2 has a bolt or nut engagement portion on the upper surface, and a convex portion inserted into the gap between the circular hole of the member to be fastened and the bolt body at one location on the inner periphery. and a fixed washer that has a convex portion inserted into the gap between the circular hole in the fastened member and the bolt body at one location on the inner periphery, and the convex portion of the movable washer and the convex portion of the fixed washer This is used in combination with the parts spaced apart in the axial direction.
【0007】請求項3の発明は、被締結部材の円形孔と
ボルト胴部との隙間内へ挿入される凸部を胴部の一部に
形成したボルトと、ナットへの係合部を有し、内周の1
個所に被締結部材の円形孔とボルト胴部との隙間に挿入
される凸部を有する可動ワッシャとからなり、ボルト凸
部と可動ワッシャの凸部とを軸方向に離間させて組合せ
使用するものである。[0007] The invention according to claim 3 provides a bolt having a protrusion formed in a part of the body to be inserted into the gap between the circular hole of the member to be fastened and the bolt body, and an engaging part for the nut. 1 on the inner circumference
It consists of a movable washer that has a convex part inserted into the gap between the circular hole of the member to be fastened and the bolt body, and is used in combination with the bolt convex part and the convex part of the movable washer spaced apart in the axial direction. It is.
【0008】請求項4の発明は、被締結部材にあけた円
形孔に挿通して被締結部材を両面からボルト頭部とナッ
トとで挾持締結するものにおいて、ボルトの胴部もしく
はボルトへの係合部を有する可動ワッシャの一部に、被
締結部材の円形孔とボルト胴部との隙間に挿入され、上
記円形孔の半径と上記ボルト胴部の半径との差より大き
く、該差の2倍より小さい高さの凸部を形成し、上記ボ
ルト等と組合せ使用される固定ワッシャの内周の1個所
に、被締結部材の円形孔とボルト胴部との隙間内に挿入
される凸部を、上記ボルト等の凸部と締付時に係合可能
な位置に形成したものである。[0008] The invention according to claim 4 is a method for clamping and fastening a bolt head and a nut from both sides by inserting the bolt into a circular hole drilled in a member to be fastened. A part of the movable washer having a joint part is inserted into the gap between the circular hole of the member to be fastened and the bolt body, and is larger than the difference between the radius of the circular hole and the radius of the bolt body, and is 2 of the difference. A convex portion with a height smaller than twice the height is formed at one location on the inner circumference of the fixing washer used in combination with the bolt, etc., and is inserted into the gap between the circular hole of the fastened member and the bolt body. is formed at a position where it can engage with the convex portion of the bolt etc. during tightening.
【0009】[0009]
【作用】請求項1の発明によれば、ボルト又はナットを
時計方向に回し始めると、可動ワッシャが固定ワッシャ
に対して時計方向に回動するため、図4に示すように、
可動ワッシャの凸部(A)が固定ワッシャの左側の凸部
(B)から遠ざかり、被締結部材の円形孔内で、図5に
示すように、上記(A)点および(B)点と、この(A
)と(B)との間のボルトの外周の1点(D)の3点で
接触し、可動ワッシャの凸部(A)は三日月形の隙間に
クサビを打ち込むように作用してボルトが円形孔に固定
される。したがって、ボルトとナットの螺子部に大きな
摩擦抵抗が働いてもボルトは回転せず、共回りが防止さ
れる。[Operation] According to the invention of claim 1, when the bolt or nut starts to be turned clockwise, the movable washer rotates clockwise relative to the fixed washer, so as shown in FIG.
The convex part (A) of the movable washer moves away from the left convex part (B) of the fixed washer, and as shown in FIG. This (A
) and (B) make contact at three points, one point (D) on the outer periphery of the bolt, and the convex part (A) of the movable washer acts like driving a wedge into the crescent-shaped gap, so that the bolt becomes circular. fixed in the hole. Therefore, even if large frictional resistance acts on the threaded portions of the bolt and nut, the bolt does not rotate, and co-rotation is prevented.
【0010】ボルト又はナットを反時計方向に回し始め
ると、図6に示すように、可動ワッシャの凸部(A)が
固定ワッシャの右側の凸部(C)から遠ざかり、被締結
部材の円形孔内で、上記(A)点および(C)点と、こ
れら(A)と(C)との間のボルト外周の一点(D’)
の3点で接触し、これ以上は回転せず、共回り防止とな
る。このように本発明による共回り防止作用は、上記(
A)点および(B)もしくは(C)点と、これら(A)
と(B)もしくは(C)との間のボルトの外周の1点が
必ず被締結部材の円形孔の内壁に接触して行なわれるた
め、ボルトは、その軸線が円形孔の中心軸線と平行に保
持されることになり、ボルトの傾きが防止される。When the bolt or nut starts to be turned counterclockwise, the convex part (A) of the movable washer moves away from the right convex part (C) of the fixed washer, as shown in FIG. Within, the above points (A) and (C) and a point (D') on the bolt outer circumference between these (A) and (C).
They make contact at three points and do not rotate any further, preventing co-rotation. In this way, the co-rotation prevention effect according to the present invention is achieved by the above-mentioned (
A) point and (B) or (C) point and these (A)
Because one point on the outer circumference of the bolt between This will prevent the bolt from tilting.
【0011】請求項2の発明は、可動ワッシャおよび固
定ワッシャの内周の1個所に凸部(A)(E)を夫々形
成したもので、作用に関しては、請求項1の発明と略同
一となるのでその説明は省略する。The invention of claim 2 has convex portions (A) and (E) formed at one location on the inner periphery of the movable washer and the fixed washer, respectively, and has substantially the same function as the invention of claim 1. Therefore, the explanation will be omitted.
【0012】請求項3の発明は、請求項2の固定ワッシ
ャを省略し、ボルトに1つの凸部(E)を直接形成した
もので、作用に関しては、請求項1の発明と略同一とな
るのでその説明は省略する。[0012] The invention of claim 3 omits the fixing washer of claim 2 and forms one convex portion (E) directly on the bolt, and has substantially the same effect as the invention of claim 1. Therefore, its explanation will be omitted.
【0013】請求項4の発明によれば、図15〜図17
に示すように、凸部(F)の為にボルト(3)は円形孔
(7)の片方に偏心せしめられているため、締付時にお
ける共回りによってボルト(3)に締付方向へ回転させ
ようとする力が加わると、凸部(F)の一部が、固定ワ
ッシャ(2)の凸部(E)に当って押圧すると共に、上
記凸部(F)もしくは凸部(E)のいずれか一方が、円
形孔(7)の内壁もしくはボルト(3)の胴部に当って
ボルトが回らなくなる。更に力が加わってボルト(3)
を回そうとすると、例えば、凸部(F)が円形孔(7)
の内壁に当っていると、ボルトの中心点(Y)は(Y’
)に移動し、凸部(F)の内壁との接点(P)は(P’
)に、ボルト(3)と内壁との接点(Q)は(Q’)に
摺動しながら移動していく。こうしてボルト(3)の中
心点(Y)は円形孔の中心点(X)の回りを自転しなが
ら回転する。したがって、ボルト(3)の頭部座面(G
)は、横方向に移動し、ボルト(3)の座面以上の面積
を摺動することになって摩擦抵抗も中心点(X)が移動
しないときより増大する。According to the invention of claim 4, FIGS. 15 to 17
As shown in the figure, because the bolt (3) is eccentric to one side of the circular hole (7) due to the convex portion (F), the bolt (3) rotates in the tightening direction due to co-rotation during tightening. When a force is applied to force the protrusion, a part of the protrusion (F) hits and presses the protrusion (E) of the fixing washer (2), and the protrusion (F) or the protrusion (E) Either one of them will hit the inner wall of the circular hole (7) or the body of the bolt (3) and the bolt will not turn. More force is added to the bolt (3)
For example, when trying to turn the convex part (F), the circular hole (7)
The center point (Y) of the bolt is (Y'
), and the contact point (P) of the convex part (F) with the inner wall is (P'
), the contact point (Q) between the bolt (3) and the inner wall moves while sliding in (Q'). In this way, the center point (Y) of the bolt (3) rotates around the center point (X) of the circular hole while rotating. Therefore, the head bearing surface (G
) moves laterally and slides over an area larger than the seating surface of the bolt (3), and the frictional resistance also increases compared to when the center point (X) does not move.
【0014】又、ナットが強く締付けられると、座面(
G)の摩擦抵抗もそれにつれて大きくなり、この動きに
くくなった座面(G)の為、凸部(F)と円形孔(7)
の摩擦抵抗も大きくなる。従って、ナットをいくら強く
締めても共回りは起こらない。[0014] Also, if the nut is tightened strongly, the seat surface (
The frictional resistance of G) also increases accordingly, and due to this seat surface (G) becoming difficult to move, the convex part (F) and circular hole (7)
The frictional resistance also increases. Therefore, no matter how strongly the nut is tightened, co-rotation will not occur.
【0015】以上のように共回りを防ぐ側の摩擦抵抗は
、摺動面積の増えた座面(G)の他にP点、Q点の摩擦
抵抗も加わるので、従来のボルトを使用するときより大
幅に増大する。一方、螺子部(H)における摩擦抵抗は
、従来のボルトと変わらないので、共回りを防止する側
の摩擦抵抗の方が常に相対的に大きくなり、共回りを防
止することができる。As mentioned above, the frictional resistance on the side that prevents co-rotation is due to the frictional resistance at points P and Q in addition to the seat surface (G) where the sliding area has increased, so when using a conventional bolt, will increase significantly. On the other hand, since the frictional resistance at the threaded portion (H) is the same as that of a conventional bolt, the frictional resistance on the side that prevents co-rotation is always relatively larger, and co-rotation can be prevented.
【0016】緩回時における作用に関しては、請求項1
の発明と略同一となるのでその説明は省略する。Regarding the action during slow rotation, claim 1
Since this invention is substantially the same as the invention of , the explanation thereof will be omitted.
【0017】[0017]
【実施例】以下本発明装置の実施例を図1〜図3を参照
しながら説明すると次の通りである。図1〜図3は本発
明の第1の実施例を示すもので、(1)は可動ワッシャ
、(2)は固定ワッシャ、(3)はボルト、(4)はナ
ット、(5)(6)は被締結部材、(7)は被締結部材
(5)(6)の円形孔を示している。DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the apparatus of the present invention will be described below with reference to FIGS. 1 to 3. 1 to 3 show a first embodiment of the present invention, in which (1) is a movable washer, (2) is a fixed washer, (3) is a bolt, (4) is a nut, (5) and (6). ) indicates the members to be fastened, and (7) indicates the circular holes of the members (5) and (6) to be fastened.
【0018】可動ワッシャ(1)は、図2に示すように
、ボルト(3)又はナット(4)の角形頭部への係合部
(8)を外周に有し、内周の1個所に被締結部材(5)
(6)の円形孔(7)とボルト(3)の胴部(9)との
隙間内へ挿入される凸部(A)を有している。この凸部
(A)は、可動ワッシャ(1)の1個所にだけ形成した
ので、2個所に形成する場合に比べて、厚肉となって剛
性が高く、捩れに対して強い。As shown in FIG. 2, the movable washer (1) has an engaging portion (8) on the outer periphery for engaging the square head of the bolt (3) or nut (4), and has an engaging portion (8) on the outer periphery at one location on the inner periphery. Part to be fastened (5)
It has a protrusion (A) that is inserted into the gap between the circular hole (7) of (6) and the body (9) of the bolt (3). Since the convex portion (A) is formed only at one location on the movable washer (1), it is thicker, has higher rigidity, and is more resistant to torsion than when it is formed at two locations.
【0019】固定ワッシャ(2)は、図3に示すように
、内周の2個所に被締結部材(5)(6)の円形孔(7
)とボルト(3)の胴部(9)との隙間内へ挿入される
凸部(B)(C)を有している。As shown in FIG. 3, the fixing washer (2) has two circular holes (7) on the inner circumference of the fastened members (5) and (6).
) and the body (9) of the bolt (3).
【0020】両ワッシャ(1)(2)は、図1に示すよ
うに、相対的に回転可能な状態に重ね合わせて使用する
もので、可動ワッシャ(1)の凸部(A)を固定ワッシ
ャ(2)の凸部(B)(C)間に位置させて組合せるも
のである。尚、固定ワッシャ(2)の両凸部(B)(C
)は、中心角180゜以内であればよいが、120゜と
するのが最も良い。また、固定ワッシャ(2)の両凸部
(B)(C)の一方の高さと、可動ワッシャ(1)の凸
部(A)の高さとの和は、被締結部材(5)(6)の円
形孔(7)とボルト(3)の胴部(9)との隙間よりも
大きく設定し、しかして、各凸部(A)(B)(C)の
高さは、上記隙間より小さく設定するものである。Both washers (1) and (2) are used in a relatively rotatable state stacked on top of each other, as shown in FIG. (2) is placed between the convex portions (B) and (C) and combined. In addition, both convex portions (B) (C) of the fixed washer (2)
) may be within a central angle of 180°, but it is best to set it to 120°. Furthermore, the sum of the height of one of the two convex portions (B) and (C) of the fixed washer (2) and the height of the convex portion (A) of the movable washer (1) is the sum of the height of the convex portion (A) of the fastened member (5) and (6). The height of each convex part (A), (B), and (C) is set to be larger than the gap between the circular hole (7) of This is what you set.
【0021】次に、本発明の第1実施例の動作を図4〜
図6で説明する。先ず、ボルト(3)は可動ワッシャ(
1)および固定ワッシャ(2)の凸部(A)(B)(C
)が図4に示す状態のとき、被締結部材(5)(6)の
円形孔(7)内に挿入することができる。この状態でナ
ット(4)を時計方向に回転させ、ボルト(3)が共回
りを始めると、係合部(8)の存在で、可動ワッシャ(
1)が固定ワッシャ(2)に対して時計方向に回動する
ため、可動ワッシャ(1)の凸部(A)が固定ワッシャ
(2)の左側の凸部(B)から遠ざかり、図5に示すよ
うに、被締結部材(5)(6)の円形孔(7)内で、上
記(A)点および(B)点と、これら(A)と(B)と
の間のボルト(3)の外周1点(D)の3点で接触し、
可動ワッシャ(1)の凸部(A)が三日月形の隙間にク
サビを打ち込むように作用してボルト(3)が円形孔(
7)に固定され、これ以上は時計方向に回転せず、共回
り防止となる。このとき固定ワッシャ(2)の右側の凸
部(C)は、ボルト(3)の外周面に対して非接触であ
る。Next, the operation of the first embodiment of the present invention will be explained with reference to FIGS.
This will be explained with reference to FIG. First, attach the bolt (3) to the movable washer (
1) and the protrusions (A) (B) (C) of the fixed washer (2)
) can be inserted into the circular holes (7) of the fastened members (5) and (6) when they are in the state shown in FIG. In this state, when the nut (4) is rotated clockwise and the bolt (3) starts rotating together, the movable washer (
1) rotates clockwise relative to the fixed washer (2), the convex part (A) of the movable washer (1) moves away from the left convex part (B) of the fixed washer (2), and as shown in FIG. As shown, within the circular hole (7) of the fastened members (5) and (6), the bolt (3) is inserted between the points (A) and (B) and these points (A) and (B). Contact at three points, one point (D) on the outer periphery of
The convex part (A) of the movable washer (1) acts like driving a wedge into the crescent-shaped gap, and the bolt (3) is inserted into the circular hole (
7) and will not rotate clockwise any further, preventing co-rotation. At this time, the right convex portion (C) of the fixing washer (2) is not in contact with the outer peripheral surface of the bolt (3).
【0022】ボルト(3)を反時計方向に回し始めると
、可動ワッシャ(1)の凸部(A)が固定ワッシャ(2
)の右側の凸部(C)から遠ざかり、図6に示すように
被締結部材(5)(6)の円形孔(7)内で上記(A)
点および(C)点と、これら(A)と(C)との間のボ
ルト(3)の外周1点(D’)の3点で接触し、凸部(
A)が三日月形の隙間にクサビを打ち込むように作用し
て、ボルト(3)はこれ以上は反時計方向に回転せず、
共回り防止となる。When the bolt (3) begins to be turned counterclockwise, the protrusion (A) of the movable washer (1) touches the fixed washer (2).
) in the circular holes (7) of the fastened members (5) and (6) as shown in FIG.
The points (A) and (C) contact each other at three points, one point (D') on the outer periphery of the bolt (3) between these (A) and (C), and the convex part (
A) acts like driving a wedge into the crescent-shaped gap, and the bolt (3) no longer rotates counterclockwise.
This prevents co-rotation.
【0023】上記の現象によって、ボルト(3)又はナ
ット(4)の締付けを行なう時、外すときのいずれの場
合にも共回りを防止させることができる。[0023] Due to the above phenomenon, it is possible to prevent the bolts (3) or nuts (4) from rotating together when tightening or removing them.
【0024】図7〜図9は、可動ワッシャ(1)の係合
部(8)の変形例を示すもので、図2ではボルト(3)
又はナット(4)の角形頭部に適合する完全六角形の周
壁とした場合を示しているが、図7は、可動ワッシャ(
1)の外周3個所に切目(10a)を入れ、この切目(
10a)間を起立させて係合部(8)とする場合を示し
ている。また、図8および図9は、可動ワッシャ(1)
の中心点(O)を介して凸部(A)と対峙する板幅内の
位置の1箇所に接線状の切目(10b)を入れ、かつ、
この切目(10b)の位置から凸部(A)の突出方向と
反対方向の上面側へ半球状に突出させて係合部(8)を
形成した場合を示している。このように可動ワッシャ(
1)の中心点(O)を介して対峙する位置に凸部(A)
と係合部(8)とを反対方向に向けて形成してあるので
、例えば、この可動ワッシャ(1)をボルト(3)の頭
部側に配置すると、ボルト頭部が係合部(8)で図9の
矢印方向に押圧され、その結果、凸部(A)がボルト胴
部(9)に押付けられて、ボルト胴部(9)と凸部(A
)との間に隙間が生じることがなく、凸部(A)は確実
にクサビ作用を発揮する。7 to 9 show modified examples of the engaging portion (8) of the movable washer (1), and in FIG. 2, the bolt (3)
Alternatively, a completely hexagonal peripheral wall that fits the square head of the nut (4) is shown, but Fig. 7 shows a case where a movable washer (
Make cuts (10a) at three locations on the outer circumference of 1), and
10a) shows a case in which the space is made to stand up to form an engaging portion (8). In addition, FIGS. 8 and 9 show the movable washer (1)
A tangential cut (10b) is made at one location within the plate width facing the convex portion (A) through the center point (O) of the plate, and
A case is shown in which the engaging portion (8) is formed by protruding semispherically from the position of the cut (10b) toward the upper surface side in the opposite direction to the protruding direction of the convex portion (A). In this way, the movable washer (
1) Convex portion (A) at a position facing each other through the center point (O)
For example, if this movable washer (1) is placed on the head side of the bolt (3), the bolt head will face the engaging part (8) in opposite directions. ) in the direction of the arrow in FIG.
), and the convex portion (A) reliably exhibits a wedge effect.
【0025】図10は第2の実施例を示すもので、固定
ワッシャ(2)の内周1個所に、被締結部材(5)(6
)の円形孔(7)とボルト(3)の胴部(9)との隙間
内へ挿入される凸部(E)を形成したもので、ボルト(
3)の頭部側に固定ワッシャ(2)をナット側に可動ワ
ッシャ(1)を配置して組合せ使用する。尚、可動ワッ
シャ(1)の凸部(A)と固定ワッシャ(2)の凸部(
E)の高さの和は、被締結部材(5)(6)の円形孔(
7)とボルト(3)の胴部(9)との隙間よりも大きく
設定し、各凸部(A)(E)の高さは、上記隙間より小
さく設定する。FIG. 10 shows a second embodiment, in which a fastened member (5) (6
) is formed with a protrusion (E) that is inserted into the gap between the circular hole (7) of the bolt (3) and the body (9) of the bolt (3).
3) is used in combination by placing the fixed washer (2) on the head side and the movable washer (1) on the nut side. In addition, the convex part (A) of the movable washer (1) and the convex part (A) of the fixed washer (2)
The sum of the heights of E) is the sum of the heights of the circular holes (5) and (6) of the fastened members (5) and (6).
7) and the body portion (9) of the bolt (3), and the height of each convex portion (A) (E) is set to be smaller than the gap.
【0026】そして、上記ボルト(3)は、可動ワッシ
ャ(1)および固定ワッシャ(2)の凸部(A)(E)
が図11に示す状態のとき、被締結部材(5)(6)の
円形孔(7)内に挿入することができる。この状態でナ
ット(4)を時計方向に回転させると、係合部(8)の
存在で、可動ワッシャ(1)が固定ワッシャ(2)に対
して時計方向に回動するため、可動ワッシャ(1)の凸
部(A)が固定ワッシャ(2)の凸部(E)から周方向
に遠ざかり、図12に示すように、被締結部材(5)(
6)の円形孔(7)内で、上記(A)点および(E)点
と、これら(A)と(E)との間のボルト(3)の外周
1点(D”)の3点で接触し、これ以上は時計方向に回
転せず、共回り防止となる。[0026] The bolt (3) is attached to the protrusions (A) and (E) of the movable washer (1) and the fixed washer (2).
When it is in the state shown in FIG. 11, it can be inserted into the circular hole (7) of the fastened members (5) and (6). When the nut (4) is rotated clockwise in this state, the movable washer (1) rotates clockwise relative to the fixed washer (2) due to the presence of the engaging portion (8), so the movable washer ( The convex part (A) of 1) moves away from the convex part (E) of the fixed washer (2) in the circumferential direction, and as shown in FIG.
In the circular hole (7) of 6), three points: the above points (A) and (E), and one point (D") on the outer periphery of the bolt (3) between these (A) and (E). It will not rotate clockwise any further, preventing co-rotation.
【0027】上記ボルト(3)またはナット(4)を反
時計方向に回し始めると、可動ワッシャ(1)の凸部(
A)が、固定ワッシャ(2)の凸部(E)とすれ違った
のち図13に示すように、凸部(E)から遠ざかり、被
締結部材(5)(6)の円形孔(7)内で(A)点およ
び(E)点と、これら(A)と(E)との間のボルト(
3)の外周1点(D’’’)の3点で接触し、これ以上
は反時計方向に回転せず共回りとなる。When you start turning the bolt (3) or nut (4) counterclockwise, the convex part (
After A) passes the convex part (E) of the fixed washer (2), it moves away from the convex part (E) and enters the circular hole (7) of the fastened members (5) and (6), as shown in Fig. 13. At point (A) and point (E), and the bolt between these (A) and (E) (
They make contact at three points, one point (D''') on the outer periphery of 3), and do not rotate counterclockwise any further but rotate together.
【0028】図14は第3の実施例を示すもので、固定
ワッシャ(2)の凸部(E)を、ボルト(3)の胴部(
9)に直接形成し、固定ワッシャ(2)を省略したもの
で、図10に示した可動ワッシャ(1)と組合せて使用
するものである。この場合、ボルト(3)の凸部(E)
と可動ワッシャ(1)の凸部(A)の形成条件は、第2
の実施例と同一であり、また、ボルト(3)の凸部(E
)は、ボルト(3)と可動ワッシャ(1)の組合せ時に
、可動ワッシャ(1)の凸部(A)と干渉するのを防止
するため、図14の1点鎖線もしくは2点鎖線で示すよ
うに、軸方向に離間させて胴部(9)の所定部位に形成
し、被締付部材(5)もしくは(6)の円形孔(7)内
に配置する。尚、ボルト等の共回り防止動作は、第2の
実施例と同一であり、説明を省略する。FIG. 14 shows a third embodiment, in which the protrusion (E) of the fixed washer (2) is connected to the body (3) of the bolt (3).
9), omitting the fixed washer (2), and is used in combination with the movable washer (1) shown in FIG. In this case, the protrusion (E) of the bolt (3)
The conditions for forming the convex portion (A) of the movable washer (1) are as follows.
It is the same as the embodiment of , and the convex part (E
), as shown by the one-dot chain line or the two-dot chain line in FIG. In addition, they are formed at predetermined portions of the body (9) at axially spaced positions and placed in the circular hole (7) of the member to be tightened (5) or (6). Note that the operation to prevent the bolts and the like from rotating together is the same as in the second embodiment, and the explanation thereof will be omitted.
【0029】図15〜図17は本発明の第4実施例を示
すもので、ボルト(3)の胴部(9)に凸部(F)を固
定ワッシャ(2)の凸部(E)の一部と当接可能に形成
したものである。上記凸部(F)の高さ(h)は、円形
孔(7)の半径(r1)とボルト(3)の胴部(9)の
半径(r2)との差より大きく、その差の2倍よりも小
さい範囲で任意で選択することができる。すなわち、(
r1−r2)<h<2(r1−r2)、その理由は、(
r1−r2)より小さい高さの凸部(F)を設けた場合
、そのボルトの中心(Y)が円形孔(7)の中心点(X
)に置かれたときは、凸部(F)は円形孔(7)の内壁
に接触することなく回転してしまうことになるため、共
回りを防止できない。また、2(r1−r2)以上の高
さの凸部を設けると、円形孔(7)に挿通できない。15 to 17 show a fourth embodiment of the present invention, in which a protrusion (F) is fixed to the body (9) of the bolt (3) and a protrusion (E) of the washer (2) is fixed to the body (9) of the bolt (3). It is formed so that it can come into contact with a part of it. The height (h) of the convex portion (F) is greater than the difference between the radius (r1) of the circular hole (7) and the radius (r2) of the body (9) of the bolt (3), and 2 of the difference It can be arbitrarily selected within a range smaller than double. That is, (
r1-r2)<h<2(r1-r2), the reason is (
r1-r2), the center of the bolt (Y) is the center point (X) of the circular hole (7).
), the convex portion (F) will rotate without contacting the inner wall of the circular hole (7), and co-rotation cannot be prevented. Further, if a convex portion with a height of 2 (r1-r2) or more is provided, it cannot be inserted into the circular hole (7).
【0030】そして、図15に示す状態で、ボルト(3
)を被締結部材(5)(6)の円形孔(7)に挿入した
のち、ナット(4)を時計方向に回転させると、ボルト
(3)が共回りを始め、ボルト(3)の凸部(F)の一
部が固定ワッシャ(2)の凸部(E)に当って、固定ワ
ッシャ(2)はボルト(3)と共に回転する。その後、
上記ボルト(3)は、円形孔(7)の片方に偏心させて
あるため、ボルト(3)の回転により、凸部(F)もし
くは凸部(E)のいずれか一方が被締結部材(5)(6
)の円形孔(7)の内壁もしくはボルト(3)の胴部に
当って回らなくなる。更に力を加えてボルト(3)を回
そうとした場合、例えば、図16に示すように、凸部(
F)が円形孔(7)の内壁に当っていると、ボルト(3
)の中心点(Y)は(Y’)に移動し、凸部(F)と円
形孔(7)の内壁との接点(P)は(P’)に、又ボル
ト(3)と上記内壁との接点(Q)は(Q’)に摺動し
ながら移動し、ボルト(3)の中心点(Y)は円形孔(
7)の中心点(X)の回りを自転しながら回転し、(P
)点および(Q)点の摩擦抵抗が増大する。また、ボル
ト(3)の頭部座面においては、ボルト(3)の中心点
(Y)が横に移動するため、ボルト(3)の座面(G)
は、ボルト(3)の座面以上の面積を摺動し、摩擦抵抗
が増大する。こうしてボルト(3)と被締結部材(5)
(6)との間の共回り防止用の摩擦抵抗が螺子部(H)
における摩擦抵抗により大きくなると、ボルト(3)は
それ以上は時計方向に回転せず、共回り防止となる。Then, in the state shown in FIG. 15, the bolt (3
) into the circular holes (7) of the fastened members (5) and (6), and then rotate the nut (4) clockwise, the bolts (3) begin to rotate together and the convexity of the bolt (3) A part of the part (F) hits the convex part (E) of the fixed washer (2), and the fixed washer (2) rotates together with the bolt (3). after that,
Since the bolt (3) is eccentric to one side of the circular hole (7), the rotation of the bolt (3) causes either the convex portion (F) or the convex portion (E) to become attached to the member to be fastened (5). )(6
) will hit the inner wall of the circular hole (7) or the body of the bolt (3) and will not turn. If you try to turn the bolt (3) by applying more force, for example, as shown in Figure 16, the protrusion (
When the bolt (F) is in contact with the inner wall of the circular hole (7), the bolt (3)
) moves to (Y'), the contact point (P) between the convex part (F) and the inner wall of the circular hole (7) moves to (P'), and the contact point (P) between the bolt (3) and the inner wall The contact point (Q) with the bolt (3) moves while sliding to (Q'), and the center point (Y) of the bolt (3) is connected to the circular hole (
7) rotates around the center point (X), and (P
) and (Q) points increase. In addition, since the center point (Y) of the bolt (3) moves laterally on the head bearing surface of the bolt (3), the bearing surface (G) of the bolt (3)
slides over an area larger than the seating surface of the bolt (3), increasing frictional resistance. In this way, the bolt (3) and the member to be fastened (5)
(6) The frictional resistance to prevent co-rotation between the threaded part (H)
If the frictional resistance increases, the bolt (3) will no longer rotate clockwise and will be prevented from rotating together.
【0031】ナット(4)を反時計方向に回し始めると
、螺子部(H)における摩擦抵抗が、ボルト(3)と被
締付部材(5)(6)との間の共回り防止用の摩擦抵抗
より大きくなり、ボルト(3)が共回りを始める。上記
ボルト(3)がさらに反時計方向に回転すると、第2の
実施例における図12に示すのと同じ要領で共回りが防
止される。When the nut (4) begins to be turned counterclockwise, the frictional resistance at the threaded portion (H) prevents the bolt (3) and the members to be tightened (5) and (6) from rotating together. This becomes greater than the frictional resistance, and the bolt (3) begins to rotate together. When the bolt (3) further rotates counterclockwise, co-rotation is prevented in the same manner as shown in FIG. 12 in the second embodiment.
【0032】図18および図19は固定ワッシャ(2)
のさらに他の変形例を示すもので、両側対称部位に弾性
片(11)(11)を延設形成し、かつ、弾性片(11
)(11)を凸部(E)の突出方向に向けて僅かに折曲
形成したもので、ボルト(3)又はナット(4)の締付
時、上記弾性片(11)(11)が被締結部材(5)(
6)に圧接し、その摩擦力を利用して固定ワッシャ(2
)が共回りするのを防止する。すなわち、回転トルクは
、外周の接触点までの回転半径とその接線方向の作用力
の大きさとなるため、ボルト(3)に比べて固定ワッシ
ャ(2)の外形を大きくすることにより、回転半径差に
相当した回転トルク差が生じ、これによって回転ワッシ
ャ(2)が回転しなくなる。FIGS. 18 and 19 show the fixing washer (2)
This shows still another modification example, in which elastic pieces (11) (11) are extended and formed in symmetrical parts on both sides, and the elastic pieces (11)
) (11) is slightly bent toward the protruding direction of the convex portion (E), so that the elastic pieces (11) and (11) are covered when tightening the bolt (3) or nut (4). Fastening member (5) (
6) and using its frictional force, the fixed washer (2
) to prevent them from rotating together. In other words, the rotational torque is determined by the rotational radius up to the contact point on the outer periphery and the magnitude of the acting force in the tangential direction, so by making the outer diameter of the fixed washer (2) larger than the bolt (3), the rotational radius difference can be reduced. A rotational torque difference corresponding to the rotational torque difference occurs, which causes the rotating washer (2) to stop rotating.
【0033】上記固定ワッシャ(2)の凸部(B)(C
)(E)は、図20に示すような形状としてもよい。即
ち、固定ワッシャ(2)の凸部(B)(C)(E)の先
端に、被締付部材(5)(6)の円形孔(7)の内周面
に当接する厚肉部(12)を形成し、かつ、凸部(B)
(C)(E)の基端部(13)に凹部を形成し、円形孔
(7)への固定ワッシャ(2)の凸部(B)(C)(E
)の挿入時、凸部(B)(C)(E)の基端部(13)
が円形孔(7)の内壁の角部(5a)に当接しないよう
にしたものであり、凸部(B)(C)(E)の基端部(
13)と円形孔(7)の内壁の角部(5a)とを非接触
とすることにより、凸部(B)(C)(E)が円形孔(
7)から迫り出して固定ワッシャ(2)が被締結部材(
5)から離反するのを防止する。[0033] Convex portions (B) (C) of the fixing washer (2)
)(E) may have a shape as shown in FIG. That is, a thick wall portion ( 12) and a convex portion (B)
(C) A recess is formed in the base end (13) of (E), and a convex part (B) (C) (E) of the fixing washer (2) is formed in the circular hole (7).
), the base end (13) of the protrusion (B) (C) (E)
is designed so that it does not come into contact with the corner (5a) of the inner wall of the circular hole (7), and the base end (
13) and the corner (5a) of the inner wall of the circular hole (7), the convex portions (B), (C), and (E) are connected to the circular hole (
The fixing washer (2) protrudes from the fastened member (
5) Preventing people from leaving the company.
【0034】[0034]
【発明の効果】請求項1の発明によれば、係合部の存在
によってボルト又はナットと可動ワッシャとを一体的に
回転させることができ、その結果、ボルト又はナットを
回転させるとき、可動ワッシャの凸部と、固定ワッシャ
の凸部の一方と、ボルトの一部との3点で被締付部材の
円形孔内に接触し、共回りを確実に防止することがでる
と共に、ボルトの軸線を被締結部材の円形孔の軸線と常
に平行に保持させ得る。また、ボルトは一般市販品を使
用でき、被締結部材には単純な円形孔を形成すればよく
、コストが安い。According to the invention of claim 1, the bolt or nut and the movable washer can be rotated together due to the presence of the engaging portion, and as a result, when the bolt or nut is rotated, the movable washer The convex portion of the fixing washer, one of the convex portions of the fixing washer, and a part of the bolt contact the inside of the circular hole of the tightened member at three points, reliably preventing co-rotation, and also aligning the axis of the bolt. can be maintained parallel to the axis of the circular hole of the member to be fastened. In addition, commercially available bolts can be used, a simple circular hole may be formed in the member to be fastened, and the cost is low.
【0035】請求項2の発明によれば、可動ワッシャお
よび固定ワッシャに夫々1個の凸部を形成するだけでよ
いので製作が容易で、コストが安く、しかも、凸部を2
個形成する場合に比べて厚肉に形成することができ、剛
性の向上を図り得る。また、凸部のクサビ作用で、ボル
トの共回りを確実に防止することができると共に、請求
項1の発明と同様に、可動ワッシャの強度の向上を図り
得る。According to the second aspect of the invention, since it is only necessary to form one convex portion on each of the movable washer and the fixed washer, manufacturing is easy and the cost is low.
It can be formed thicker than in the case where it is formed individually, and the rigidity can be improved. Furthermore, the wedge action of the convex portion can reliably prevent the bolts from rotating together, and as in the first aspect of the invention, the strength of the movable washer can be improved.
【0036】請求項3の発明によれば、可動ワッシャを
廃止し得るので、部品点数が減少し、、ボルトの締付作
業を簡単、かつ、容易に行なうことができ、しかも、ボ
ルトの共回りを確実に防止し得る。According to the third aspect of the invention, since the movable washer can be eliminated, the number of parts can be reduced, the bolt tightening work can be performed simply and easily, and the bolts can rotate together. can be reliably prevented.
【0037】請求項4の発明によれば、ボルトは、凸部
の存在により円形孔に偏心状態で挿通され、かつ、回動
させることとなるため、締付時、ボルト座面側の摩擦抵
抗が増大し、共回りを確実に防止し得る。また、緩回時
、凸部のクサビ作用で、共回りを確実に防止し得る。According to the fourth aspect of the invention, the bolt is eccentrically inserted into the circular hole due to the presence of the convex portion and is rotated, so that the frictional resistance on the bolt seating surface side is reduced during tightening. increases, and co-rotation can be reliably prevented. Furthermore, during slow rotation, co-rotation can be reliably prevented by the wedge action of the convex portion.
【図1】本発明の第1の実施例を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.
【図2】可動ワッシャの斜視図である。FIG. 2 is a perspective view of a movable washer.
【図3】固定ワッシャの斜視図である。FIG. 3 is a perspective view of a fixing washer.
【図4〜6】第1の実施例の共回り防止作用の説明用平
面図である。4-6 are plan views for explaining the co-rotation prevention effect of the first embodiment; FIG.
【図7】可動ワッシャの変形例を示す平面図である。FIG. 7 is a plan view showing a modification of the movable washer.
【図8】可動ワッシャの更に別の変形例を示す平面図で
ある。FIG. 8 is a plan view showing still another modification of the movable washer.
【図9】図8に示した可動ワッシャをボルトに嵌め込ん
だ状態を示す断面説明図である。9 is an explanatory cross-sectional view showing a state in which the movable washer shown in FIG. 8 is fitted into a bolt; FIG.
【図10】本発明の第2の実施例を示す縦断面図である
。FIG. 10 is a longitudinal sectional view showing a second embodiment of the invention.
【図11〜13】第2の実施例の共回り防止用の説明用
平面図である。FIGS. 11 to 13 are explanatory plan views for preventing co-rotation in the second embodiment.
【図14】本発明の第3の実施例を示す縦断面図である
。FIG. 14 is a longitudinal sectional view showing a third embodiment of the present invention.
【図15】本発明の第4の実施例を示す概略平面図であ
る。FIG. 15 is a schematic plan view showing a fourth embodiment of the present invention.
【図16】第4の実施例の締付時における共回り防止原
理を説明するためのボルトと円形孔との関係を示す横断
平面図である。FIG. 16 is a cross-sectional plan view showing the relationship between the bolt and the circular hole for explaining the principle of preventing co-rotation during tightening in the fourth embodiment.
【図17】図16の縦断側面図である。FIG. 17 is a longitudinal side view of FIG. 16;
【図18】固定ワッシャの変形例を示す平面図である。FIG. 18 is a plan view showing a modification of the fixed washer.
【図19】図18のA−A線断面図である。FIG. 19 is a cross-sectional view taken along line AA in FIG. 18;
【図20】固定ワッシャの更に他の変形例を示す縦断面
図である。FIG. 20 is a longitudinal sectional view showing still another modification of the fixing washer.
Claims (4)
内周の1個所に被締結部材の円形孔とボルト胴部との隙
間内に挿入される凸部を有する可動ワッシャと、内周の
2個所に被締結部材の円形孔とボルト胴部との隙間内に
挿入される凸部を有する固定ワッシャとからなり、可動
ワッシャの凸部を固定ワッシャの凸部間に位置させて組
合せ使用することを特徴とするボルト類の共回り防止装
置。[Claim 1] It has an engaging part for a bolt or a nut,
A movable washer having a convex portion inserted into the gap between the circular hole of the member to be fastened and the bolt body at one location on the inner periphery, and a movable washer having a convex portion inserted into the gap between the circular hole of the member to be fastened and the bolt body at two locations on the inner periphery. A co-rotation prevention device for bolts, comprising a fixed washer having a convex portion inserted into a gap, and used in combination with the convex portion of the movable washer positioned between the convex portions of the fixed washer.
内周の1個所に被締結部材の円形孔とボルト胴部との隙
間内に挿入される凸部を有する可動ワッシャと、内周の
1個所に被締結部材の円形孔とボルト胴部との隙間内に
挿入される凸部を有する固定ワッシャとからなり、可動
ワッシャの凸部と固定ワッシャの凸部とを軸方向に離間
させて組合せ使用することを特徴とするボルト類の共回
り防止装置。[Claim 2] It has an engaging part for a bolt or a nut,
A movable washer having a convex portion inserted into the gap between the circular hole of the member to be fastened and the bolt body at one location on the inner periphery; A co-rotation prevention device for bolts, comprising a fixed washer having a convex portion inserted into a gap, and characterized in that the convex portion of the movable washer and the convex portion of the fixed washer are used in combination with the convex portion separated in the axial direction. .
隙間内へ挿入される凸部を胴部の一部に形成したボルト
と、ナットへの係合部を有し、内周の1個所に被締結部
材の円形孔とボルト胴部との隙間に挿入される凸部を有
する可動ワッシャとからなり、ボルトの凸部と可動ワッ
シャの凸部とを軸方向に離間させて組合せ使用すること
を特徴とするボルト類の共回り防止装置。3. A bolt having a convex portion formed in a part of the body to be inserted into the gap between the circular hole of the member to be fastened and the bolt body, and a bolt having an engagement portion for the nut, and a bolt having an inner periphery. It consists of a movable washer that has a convex part inserted into the gap between the circular hole of the fastened member and the bolt body, and is used in combination with the convex part of the bolt and the convex part of the movable washer separated in the axial direction. A device for preventing co-rotation of bolts.
被締結部材を両面からボルト頭部とナットとで挾持締結
するものにおいて、ボルトの胴部もしくはボルトへの係
合部を有する可動ワッシャの一部に、被締結部材の円形
孔とボルト胴部との隙間に挿入され、上記円形孔の半径
と上記ボルト胴部の半径との差より大きく、該差の2倍
より小さい高さの凸部を形成し、上記ボルト等と組合せ
使用される固定ワッシャの内周の1個所に、被締結部材
の円形孔とボルト胴部との隙間内に挿入される凸部を、
上記ボルト等の凸部と締付時に係合可能な位置に形成し
たことを特徴とするボルト類の共回り防止装置。[Claim 4] A movable bolt having a body of the bolt or an engaging part for the bolt, in a device that is inserted into a circular hole drilled in a member to be fastened and the member to be fastened is clamped and fastened by a bolt head and a nut from both sides. A portion of the washer is inserted into the gap between the circular hole of the member to be fastened and the bolt body, and has a height greater than the difference between the radius of the circular hole and the radius of the bolt body, and less than twice the difference. A protrusion is inserted into the gap between the circular hole of the member to be fastened and the bolt body at one place on the inner circumference of the fixing washer used in combination with the bolt, etc.
A co-rotation prevention device for bolts, characterized in that it is formed at a position where it can engage with a convex portion of the bolt, etc. during tightening.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2533491A JPH0792103B2 (en) | 1991-01-25 | 1991-01-25 | Anti-rotation device for bolts |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2533491A JPH0792103B2 (en) | 1991-01-25 | 1991-01-25 | Anti-rotation device for bolts |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04244616A true JPH04244616A (en) | 1992-09-01 |
JPH0792103B2 JPH0792103B2 (en) | 1995-10-09 |
Family
ID=12163028
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2533491A Expired - Fee Related JPH0792103B2 (en) | 1991-01-25 | 1991-01-25 | Anti-rotation device for bolts |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0792103B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001088391A1 (en) * | 2000-05-19 | 2001-11-22 | Eisuke Ishida | Structure for preventing loosening of threaded fasteners |
-
1991
- 1991-01-25 JP JP2533491A patent/JPH0792103B2/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001088391A1 (en) * | 2000-05-19 | 2001-11-22 | Eisuke Ishida | Structure for preventing loosening of threaded fasteners |
EP1283373A1 (en) * | 2000-05-19 | 2003-02-12 | ISHIDA, Eisuke | Structure for preventing loosening of threaded fasteners |
EP1283373A4 (en) * | 2000-05-19 | 2003-07-09 | Eisuke Ishida | Structure for preventing loosening of threaded fasteners |
US6758646B1 (en) | 2000-05-19 | 2004-07-06 | Eisuke Ishida | Structure for preventing loosening of threaded fasteners |
Also Published As
Publication number | Publication date |
---|---|
JPH0792103B2 (en) | 1995-10-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6758646B1 (en) | Structure for preventing loosening of threaded fasteners | |
RU2272186C2 (en) | Locking fastening device | |
JP3151178B2 (en) | Operating tool for fixtures with internal polygonal structure, especially screws | |
JP4495849B2 (en) | Locking nut | |
JP6452795B2 (en) | Lock nut | |
AU707497B2 (en) | A pre-load indicating washer and a joint assembly comprising such a washer | |
JP2002206515A (en) | Fastening structure for locking, and nut and washer for the same fastening structure | |
PT786603E (en) | PRE-LOAD CONTROL NUT THAT IS DATED IF YOU PROPER | |
JP2016526645A (en) | Fastening elements and fastening assemblies | |
JP2554969Y2 (en) | Cam washer | |
WO2020031252A1 (en) | Lock washer and fastening structure | |
CA1113749A (en) | Anchoring device for an opening, e.g. a tube end | |
JPH04244616A (en) | Device for preventing bolt from rotating together | |
US4802785A (en) | Joint construction and overhead hanger | |
US5158409A (en) | Bolt lock device | |
US3878740A (en) | Wrench socket assembly | |
JP2020143781A (en) | Lock washer, fastening structure, and method of canceling fastening of fastening structure | |
US20050087937A1 (en) | Lock type manually tightened chuck | |
JP3711395B2 (en) | Co-rotation prevention cap | |
JP2001050292A (en) | Shaft anchor having locking function | |
JPH0716094Y2 (en) | Anti-rotation device for bolts | |
JP2020112263A (en) | Anti-loosening fastening structure | |
GB2212585A (en) | Locking washer | |
JP2003146224A (en) | Steering column tilting device | |
JPH0413452Y2 (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |