JPS632650Y2 - - Google Patents

Description

【考案の詳細な説明】 本考案は、軸に取り付けた被回転体の抜け防止
機構に関する。[Detailed Description of the Invention] The present invention relates to a mechanism for preventing a rotating body attached to a shaft from coming off.

従来、軸に取り付けた被回転体の回転中におけ
る抜けを防止するには、軸方向に回転方向と逆方
向のねじを設け、このねじに抜け防止具を取り付
け被回転体の抜け防止をしていた。 Conventionally, in order to prevent a rotated object attached to a shaft from coming off during rotation, a screw was provided in the axial direction in the opposite direction to the rotating direction, and a pull-out prevention device was attached to this screw to prevent the rotated object from coming off. Ta.

しかしながら従来技術の回転体抜け防止方法で
は、ねじを用いる方式であるため、被回転体を交
換するごとに防止具を取り付け、取りはずしを行
なわなければならず時間が多くかかつたり、ねじ
がはずれなくなつたり、あるいは軸の逆回転時に
抜け防止効果が無い等の欠点を有していた。 However, since the conventional method for preventing the rotating body from coming off uses screws, it is necessary to attach and remove the preventive device each time the rotating body is replaced, which takes a lot of time, and the screws do not come off. It has drawbacks such as not being effective in preventing loosening or coming off when the shaft rotates in reverse.

本考案の目的は上述の欠点を除去し、被回転体
が回転中に軸から抜け出ず、かつ被回転体の保持
が容易にできるように工夫した回転体抜け防止機
構を提供することにある。 An object of the present invention is to eliminate the above-mentioned drawbacks, and to provide a mechanism for preventing the rotating body from falling off, which prevents the rotating body from slipping off from the shaft during rotation and allows the rotating body to be easily held.

本考案によれば、軸方向の未貫通穴及び軸と直
角方向でかつ軸方向の穴と交差し、しかも出口が
径小である穴とを有する軸１０と、軸方向の穴に
入る圧縮ばね６０と、一端と中央部に一部段差の
あるコマ２０、直角方向の穴に嵌合する球４０
と、前記コマ２０の抜け防止ストツパ３０と、前
記軸１０に嵌合しかつ球４０よりも抜け方向から
遠い位置にあるホルダ５０と、前記球４０とホル
ダ５０とで挾持される被回転体８０、とホルダ５
０の抜け方向と反対側面にある圧縮ばね７０とで
構成したことを特徴とする回転体抜け防止機構が
得られる。 According to the present invention, the shaft 10 has a non-through hole in the axial direction and a hole that is perpendicular to the axis, intersects with the axial hole, and has a small outlet, and a compression spring that enters the axial hole. 60, a piece 20 with a partial step at one end and the center, and a ball 40 that fits into a hole at right angles.
, a stopper 30 for preventing the top 20 from coming off, a holder 50 that fits onto the shaft 10 and is located further from the removal direction than the ball 40, and a rotated body 80 held between the ball 40 and the holder 50. , and holder 5
A rotating body slip-off prevention mechanism is obtained, which is characterized in that it is constituted by a compression spring 70 on the side opposite to the direction in which the rotary body comes off.

以下本考案について図面を参照して詳細に説明
する。 The present invention will be described in detail below with reference to the drawings.

第１図Ａ，Ｂは本考案の一実施例を示す断面組
立図である。軸１０には、軸方向の穴に嵌合部よ
りも径小な部分を有するコマ２０と穴の奥側に圧
縮ばね６０とが挿入されており、さらに直角方向
の穴には球４０が嵌合している。軸の抜け方向の
端面には、ストツパ３０が設けてある。ホルダ５
０は、軸１０と嵌合し、かつ球４０よりも抜け方
向から遠い位置にある。被回転体８０は、球４０
とホルダ５０とで挾持されている。圧縮ばね７０
は、ホルダ５０の抜け方向の反対面側に位置して
いる。 FIGS. 1A and 1B are cross-sectional assembly views showing one embodiment of the present invention. In the shaft 10, a piece 20 having a diameter smaller than the fitting part is inserted into the hole in the axial direction, and a compression spring 60 is inserted into the back side of the hole, and a ball 40 is fitted into the hole in the right angle direction. It matches. A stopper 30 is provided on the end face of the shaft in the withdrawal direction. Holder 5
0 fits into the shaft 10 and is further away from the exit direction than the ball 40. The rotated body 80 is the ball 40
and a holder 50. compression spring 70
is located on the side opposite to the direction in which the holder 50 comes out.

次に図を参照して動作を説明する。 Next, the operation will be explained with reference to the drawings.

コマ２０を段付部２１が直角方向の穴１１と一
致するまで押し下げると、その結果球４０はフリ
ーとなり外力が加わることにより、軸１０の外径
より中に引き込む状態となる。次に被回転体８０
を軸１０に嵌合，挿入すると球４０は軸１０の外
径より中に押し込まれる。しかる後、コマ２０を
押している力を取り去ると圧縮ばね６０の反力に
よつて、コマ２０は押し上げられ段付部２１が直
角方向の穴１１との一致がずれる結果直角方向の
穴１１にある球４０は軸１０の外径よりも外に出
た後、コマ２０はストツパ３０に当つてとまる。
その後、被回転体８０の力を取り去ると圧縮ばね
７０によつて被回転体８０はホルダ５０と球４０
によつて挾持され抜け防止が行われる。 When the top 20 is pushed down until the stepped portion 21 aligns with the perpendicular hole 11, the ball 40 becomes free and is pulled into the outside diameter of the shaft 10 by applying an external force. Next, the rotated body 80
When the ball 40 is fitted and inserted into the shaft 10, the ball 40 is pushed into the shaft 10 from its outer diameter. After that, when the force pushing the top 20 is removed, the top 20 is pushed up by the reaction force of the compression spring 60, and the stepped part 21 is misaligned with the hole 11 in the right angle direction, so that it is in the hole 11 in the right angle direction. After the ball 40 goes beyond the outer diameter of the shaft 10, the top 20 hits the stopper 30 and stops.
Thereafter, when the force of the rotated body 80 is removed, the compression spring 70 causes the rotated body 80 to move between the holder 50 and the ball 40.
It is held in place to prevent it from coming off.

以上説明したように本考案によれば、被回転体
が回転中に抜けることなくかつ被回転体の保持が
容易にでき、またストツパを押し込むだけで被回
転体の保持が解除できるという効果も得られる。 As explained above, according to the present invention, it is possible to easily hold the rotated object without the object coming off during rotation, and the holding of the rotated object can be released by simply pushing the stopper. It will be done.

【図面の簡単な説明】[Brief explanation of the drawing]

図は本考案の一実施例を示す断面組立図であ
る。図中の記号は、それぞれ次のものを示してい
る。 １０……軸、１１……段付部、２０……コマ、
２１……直角方向の穴、３０……ストツパ、４０
……球、５０……ホルダ、６０……圧縮ばね、７
０……圧縮ばね、８０……被回転体。 The figure is a sectional assembly view showing an embodiment of the present invention. The symbols in the figure indicate the following, respectively. 10... Axis, 11... Stepped part, 20... Top,
21...Right angle hole, 30...Stopper, 40
... Ball, 50 ... Holder, 60 ... Compression spring, 7
0...Compression spring, 80...Rotated body.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 軸方向の未貫通穴及び軸と直角方向でかつ軸方
向の穴と交差し、しかも出口が径小である穴とを
有する軸１０と；軸方向の穴に入る圧縮ばね６０
と；一端と中央部に一部段差のあるコマ２０と；
直角方向の穴に嵌合する球４０と；前記コマ２０
の抜け防止ストツパ３０と；前記軸１０に嵌合し
かつ球４０よりも抜け方向から遠い位置にあるホ
ルダ５０と；前記球４０とホルダ５０とで挾持さ
れる被回転体８０と；ホルダ５０の抜け方向と反
対側面にある圧縮ばね７０とで構成したことを特
徴とする回転体抜け防止機構。 A shaft 10 having an axial blank hole and a hole that is perpendicular to the axis, intersects with the axial hole, and has a small exit diameter; a compression spring 60 that enters the axial hole;
and; piece 20 with some steps at one end and the center;
a ball 40 that fits into a hole in a perpendicular direction; the top 20;
a stopper 30 for preventing the coming off; a holder 50 that fits on the shaft 10 and is located further from the coming out direction than the ball 40; a rotated body 80 held between the ball 40 and the holder 50; A rotating body removal prevention mechanism comprising a compression spring 70 on a side opposite to the removal direction.