JPS6129148Y2 - - Google Patents

Description

【考案の詳細な説明】 本考案はスイツチなどの開閉に使用される自動
復帰機構に関する。従来上記復帰機構としては、
ねじりコイルバネ使用のものが多く使用されてい
るが、この形式の自動復帰機構としては、形状な
どの制約から不適切で使用ができない場合があ
り、またねじりコイルバネを使用する自動復帰機
構にあつては、その順方向にトルクを与えると、
希望する所定の動作をして容易に復帰するが、逆
方向のトルクを与えるように使用するとコイルバ
ネが破断する危険を生じ、所定の動作をして確実
に復帰しないおそれがあり、自動復帰機構として
は不適切なものがあつた。従つて例えば、リミツ
トスイツチ対称の位置に設け、該リミツトスイツ
チらを１個の押片で開閉し、該押片に加へられた
外力を除去したとき、押片を原位置の平衡点まで
に自動復帰させる場合には、ねじりコイルバネ使
用の自動復帰機構は適切なものではない。[Detailed Description of the Invention] The present invention relates to an automatic return mechanism used for opening and closing switches and the like. Conventionally, the above-mentioned return mechanism is as follows:
Many models use torsion coil springs, but this type of automatic return mechanism may be inappropriate and cannot be used due to constraints such as shape, and automatic return mechanisms that use torsion coil springs are , when applying torque in the forward direction,
It performs the desired predetermined action and returns easily, but if used in a manner that applies torque in the opposite direction, there is a risk that the coil spring may break and the predetermined action may not occur and return reliably. There was something inappropriate about it. Therefore, for example, when limit switches are installed in symmetrical positions, the limit switches are opened and closed with one pusher, and the external force applied to the pusher is removed, the pusher automatically returns to its original equilibrium point. In this case, an automatic return mechanism using a torsion coil spring is not appropriate.

本考案はこの点を改良するためになされた自動
復帰機構に関するもので、１個の平板状にしたカ
ム状押片を駆動軸で、対称位置に例えば左右に回
動できるようにし、さらに上記回動するカム状押
片に嵌挿し、かつ自動復帰機構の両側ホルダに保
持された作動軸を、上記ホルダにばねによつて弾
発支持し、上記作動軸を上記ばねの弾発力に抗
し、所定角度回動させて、スイツチを開閉させ、
外力を除去したときは上記ばねの復帰によつて、
左右対称のいずれの位置からも容易しかも同様に
カム状押片を原位置に自動復帰させるようにした
ものである。 The present invention relates to an automatic return mechanism devised to improve this point, in which a single flat cam-shaped push piece can be rotated to symmetrical positions, for example left and right, by a drive shaft, and the above-mentioned rotation An operating shaft, which is fitted into a moving cam-like push piece and held by holders on both sides of the automatic return mechanism, is elastically supported by a spring on the holder, and the operating shaft is supported against the elastic force of the spring. , rotate the switch by a predetermined angle to open and close the switch,
When the external force is removed, the above spring returns,
The cam-like push piece is automatically returned to its original position easily and similarly from any symmetrical position.

以下本考案の実施例を付図について説明する。
第１〜３図は、本考案を説明する第１の実施例
で、１は本考案にかゝる自動復帰機構の筐体でコ
の字状に形成され、その両側ホルダ２，２を底部
から直立して設け、該ホルダ２，２間にカム状押
片３を介在するように配設する。カム状押片３の
下部には、Ｄ形状をした駆動軸４が固設され、該
駆動軸４が上記ホルダ２，２下部に設けた軸受孔
５，５に嵌挿軸架されている。 Embodiments of the present invention will be described below with reference to the accompanying drawings.
1 to 3 show a first embodiment of the present invention, in which 1 is a casing of an automatic return mechanism according to the present invention, which is formed in a U-shape, with holders 2, 2 on both sides of the casing at the bottom. The holder 2 is provided so as to stand upright from the holder 2, and a cam-shaped push piece 3 is interposed between the holders 2 and 2. A D-shaped drive shaft 4 is fixed to the lower part of the cam-like pusher piece 3, and the drive shaft 4 is inserted into bearing holes 5, 5 provided at the lower part of the holders 2, 2 and is mounted thereon.

ホルダ２，２の上部には、カム状押片３の回動
を制限するために円弧状のガイド孔６，６が形成
される。ガイド孔６，６には、作動軸７が嵌挿さ
れており、作動軸７はさらにカム状押片３の上部
に形成した軸受孔３ａに嵌挿される。 Arc-shaped guide holes 6, 6 are formed in the upper portions of the holders 2, 2 in order to limit the rotation of the cam-shaped push pieces 3. An operating shaft 7 is fitted into the guide holes 6, 6, and the operating shaft 7 is further fitted into a bearing hole 3a formed in the upper part of the cam-shaped push piece 3.

従つて駆動軸４が外力により回動すると、カム
状押片３は駆動軸４を中心として回動し、カム状
押片３に嵌挿している作動軸７はガイド孔６，６
に沿つて回動し、その回動は、６ａ，６ｂ，６ｃ
の各位置で停止される。即ち、６ａ点における停
止は左右回動における平衡点での停止、６ｂ点は
右回動の制止点及び６ｃ点は左回動の制止点であ
る。８，８はカム状押片３を回動したとき、上記
平衡点まで自動復帰させるための復帰ばねで、ホ
ルダ２，２の上縁部に設けた引掛片２ａ，２ａと
作動軸７との間に弾発張架され、作動軸７を引掛
片２ａ，２ａの方に弾発する。９，９は本考案に
かゝる自動復帰機構を使用する期器に固設したリ
ミツトスイツチで、回動するカム状押片３で開閉
されるよう、カム状押片３の両側に設けられる。 Therefore, when the drive shaft 4 is rotated by an external force, the cam-like pusher piece 3 rotates around the drive shaft 4, and the actuating shaft 7 fitted into the cam-like pusher piece 3 moves through the guide holes 6, 6.
6a, 6b, 6c
It is stopped at each position. That is, the stop at point 6a is a stop at an equilibrium point in left and right rotation, point 6b is a stop point for right rotation, and point 6c is a stop point for left rotation. Reference numerals 8 and 8 indicate return springs for automatically returning the cam-like pusher piece 3 to the above-mentioned equilibrium point when the cam-shaped pusher piece 3 is rotated. An elastic suspension is placed between them, and the actuating shaft 7 is elastically moved toward the hook pieces 2a, 2a. Reference numerals 9 and 9 designate limit switches fixed to the device that uses the automatic return mechanism according to the present invention, and are provided on both sides of the cam-like push piece 3 so as to be opened and closed by the rotating cam-like push piece 3.

第２図は本考案にかゝる自動復帰機構が平衡点
６ａで停止している場合を示す側面図で、作動軸
７をばね８により、上記平衡点６ａで上方に弾発
し停止している。いま駆動軸４を外力により、右
回転すると、駆動軸４に固設されているカム状押
片３は右回動し、従つて該押片３に嵌合している
作動軸７を復帰ばね８に抗してガイド孔６に沿つ
て右方に回動させ、復帰ばね８は８ａに示すよう
に緊張し、カム状押片３により右側のリミツトス
イツチ９を開閉して電源OFFとなり外力が解除
されると、復帰ばね８の復帰により再び作動軸７
は原位置の平衡点６ａに復帰し停止する。次に駆
動軸４を外力により左回転すると、同様にしてカ
ム状押片３は左回動し、作動軸７も復帰ばね８に
抗して左動し復帰ばね８は８ｂに示すように緊張
し、左側のリミツトスイツチ９を開閉させ、外力
を解除すると、復帰ばね８の復帰により、作動軸
７はその原位置である平衡点６ａに復帰する。こ
のように作動軸７即ちカム状押片３の左右回動の
制御停止及び平衡点６ａへの自動復帰のために、
コイルばね８，８が作動軸７の両側端と前記ホル
ダ２，２の頭部切起こし２ａ，２ａ間に弾発張架
されている。そしてばね８を作動軸７の平衡点６
ａに相当する側端にとその真上の引掛片との間に
弾発張架すれば、カム状押片３は左右いずれの方
向に回動しても同じように原位置に引き戻され復
帰を確実容易に行なうことができる。 FIG. 2 is a side view showing a case where the automatic return mechanism according to the present invention is stopped at the equilibrium point 6a, and the operating shaft 7 is sprung upward by the spring 8 and stopped at the equilibrium point 6a. . Now, when the drive shaft 4 is rotated clockwise by an external force, the cam-shaped pusher piece 3 fixed to the drive shaft 4 rotates clockwise, and the operating shaft 7 fitted to the pusher piece 3 is moved by the return spring. 8 along the guide hole 6, the return spring 8 is tensed as shown in 8a, and the cam-like push piece 3 opens and closes the right limit switch 9 to turn off the power and release the external force. Then, the return spring 8 returns to the operating shaft 7 again.
returns to the original equilibrium point 6a and stops. Next, when the drive shaft 4 is rotated to the left by an external force, the cam-shaped push piece 3 is similarly rotated to the left, and the operating shaft 7 is also moved to the left against the return spring 8, so that the return spring 8 is tensioned as shown in 8b. However, when the left limit switch 9 is opened and closed to release the external force, the return spring 8 returns, and the operating shaft 7 returns to its original position, the equilibrium point 6a. In this way, in order to control the left and right rotation of the operating shaft 7, that is, the cam-shaped push piece 3, to stop it, and to automatically return it to the equilibrium point 6a,
Coil springs 8, 8 are elastically suspended between both ends of the operating shaft 7 and the cut and raised heads 2a, 2a of the holders 2, 2. Then, the spring 8 is connected to the equilibrium point 6 of the operating shaft 7.
If an elastic suspension is placed between the side end corresponding to a and the hook piece directly above it, the cam-shaped push piece 3 will be pulled back to its original position in the same way even if it is rotated in either the left or right direction. can be carried out reliably and easily.

本考案にかゝる他の実施例を第４〜第５図に示
す。本実施例はホルダに設けた作動軸が回動する
ためのガイド孔１０を、前記実施例が円弧状の溝
であるのに対し、逆Ｖ字形としたものである。前
例と同一大のカム状押片３上部に作動軸７を嵌挿
する長孔１１を設け、作動軸７をカム状押片３、
ホルダ２，２の逆Ｖ字形ガイド孔１１，１１に嵌
挿し、ばね８により引掛片２ａ，２ａに弾発支持
する。駆動軸４を外力によつて、例えば右回動す
ると、カム状押片３も右回動する。これにつれて
作動軸７は、逆Ｖ字形ガイド孔１０に沿つて移動
し、同時に長孔１１中を下方に移動してばね８を
８ｃに示すように緊張させ、右側のリミツトスイ
ツチ９を開閉する。この場合前記リミツトスイツ
チと同一のものを同一大のカム状押片で操作する
とすれば、第５図に示すカム状押片３の移動から
みて、その右回転角は明かに少なくてすむことに
なる。そしてカム状押片３が左回動して、同様に
左側のリミツトスイツチ９を操作すると、カム状
押片３の左回転角も右回転の場合と同様に、小さ
くてすむこととなるので、ホルダ２，２を幅狭に
形成することができ、その結果スイツチなどに使
用される自動復帰機構をコンパクトに構成するこ
とができる。 Other embodiments of the present invention are shown in FIGS. 4 and 5. In this embodiment, the guide hole 10 for rotating the operating shaft provided in the holder is formed into an inverted V-shape, whereas it is an arc-shaped groove in the previous embodiment. A long hole 11 into which the operating shaft 7 is inserted is provided on the upper part of the cam-shaped pusher piece 3 of the same size as the previous example, and the operating shaft 7 is inserted into the cam-like pusher piece 3,
It is inserted into the inverted V-shaped guide holes 11, 11 of the holders 2, 2, and elastically supported by the hook pieces 2a, 2a by the spring 8. When the drive shaft 4 is rotated to the right by an external force, for example, the cam-shaped push piece 3 is also rotated to the right. Accordingly, the operating shaft 7 moves along the inverted V-shaped guide hole 10 and simultaneously moves downward in the long hole 11 to tension the spring 8 as shown at 8c, opening and closing the right limit switch 9. In this case, if the same limit switch as described above is operated by a cam-like pusher piece of the same size, the clockwise rotation angle will obviously be smaller in terms of the movement of the cam-like pusher piece 3 shown in Fig. 5. . Then, when the cam-like pusher piece 3 rotates counterclockwise and the left limit switch 9 is operated in the same way, the left rotation angle of the cam-like pusher piece 3 is also small, as in the case of clockwise rotation. 2, 2 can be formed narrowly, and as a result, an automatic return mechanism used in a switch or the like can be constructed compactly.

本実施例の場合においても、ばね８は８ｃに示
す方向にのみ緊張するのであるから、作動軸７延
いてはカム状押片３を左右いずれの方向に回動し
ても、確実容易に原位置に復帰さすことができ
る。尚本実施例にあつては、自動復帰機構をコン
パクトに構成することができるのみならず、第１
の実施例に比し、リミツトスイツチをより短時間
内に開閉さすことができる。 In the case of this embodiment as well, since the spring 8 is tensioned only in the direction shown by 8c, the operating shaft 7 and the cam-shaped push piece 3 can be rotated in either left or right direction without fail. Can be returned to position. In this embodiment, not only can the automatic return mechanism be constructed compactly, but also the first
The limit switch can be opened and closed within a shorter time than in the embodiment described above.

本考案にかゝる自動復帰機構においては、作動
軸を弾発張架する復帰ばねが、カム状押片の左右
いずれの方向への回動によるも、コイル巻方向に
のみ緊張せしめられるだけであるから、その使い
方に無理を生ずることなく常に確実容易にカム状
押片をその回動の平衡点にばねの復元力により自
動復帰さすことができる。尚本自動復帰機構は、
構成が簡潔であり、かつスイツチの開閉が確実で
誤動作を生ずるおそれがない。 In the automatic return mechanism according to the present invention, the return spring that elastically tensions the operating shaft is only tensioned in the coil winding direction, regardless of whether the cam-shaped push piece is rotated in the left or right direction. Because of this, the cam-like push piece can always be reliably and easily returned to the equilibrium point of its rotation automatically by the restoring force of the spring without causing any unreasonableness in its usage. The automatic return mechanism is
The structure is simple, the switch can be opened and closed reliably, and there is no risk of malfunction.

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

第１図は本考案にかゝる自動復帰機構の側面
図、第２図はそのAA視による正面図、第３図は
そのBB視によるカム状押片とスイツチとの関係
を説明する図、第４図は本考案にかゝる他の実施
例の正面図及び第５図はその場合におけるカム状
押片とスイツチの関係を説明する図である。 １……筐枠、２，２……ホルダ、３……カム状
押片、４……駆動軸、６……ガイド孔、７……作
動軸、８……復帰ばね、９……リミツトスイツ
チ、１０……ガイド孔、１１……長孔。 FIG. 1 is a side view of the automatic return mechanism according to the present invention, FIG. 2 is a front view of the automatic return mechanism as seen from AA, and FIG. 3 is a diagram illustrating the relationship between the cam-shaped push piece and the switch as seen from BB. FIG. 4 is a front view of another embodiment of the present invention, and FIG. 5 is a diagram illustrating the relationship between the cam-like push piece and the switch in that case. 1... Housing frame, 2, 2... Holder, 3... Cam-shaped push piece, 4... Drive shaft, 6... Guide hole, 7... Operating shaft, 8... Return spring, 9... Limit switch, 10... Guide hole, 11... Long hole.

Claims (1)

【実用新案登録請求の範囲】 (1) 自動復帰機構におけるコの字状筐枠の両側ホ
ルダ下部間に、カム状押片を固設した駆動軸を
設け、かつ前記カム状押片の上部に該駆動軸と
平行な作動軸を設け、前記駆動軸の回動に応じ
てカム状押片が前記作動軸とともに駆動軸を中
心として回動できるように、前記ホルダ側面に
円弧状の作動軸ガイド孔を設け、さらに前記作
動軸端と前記ホルダ頭部の切起し間にコイルば
ねを弾発させ、前記カム状押片の回動によつて
スイツチを開放し駆動軸を停止したとき、前記
コイルばねによつて前記カム状押片を原位置に
自動復帰できるようにしたことを特徴とする自
動復帰機構。 (2) 上記カム状押片に設けた上記作動軸の軸受孔
を長孔とし、かつ上記ホルダに設けたガイド孔
を逆Ｖ字形としたことを特徴とする実用新案登
録請求の範囲第１項記載の自動復帰機構。[Scope of Claim for Utility Model Registration] (1) A drive shaft having a cam-shaped push piece fixed thereon is provided between the lower parts of the holders on both sides of the U-shaped housing frame in the automatic return mechanism, and An operating shaft parallel to the drive shaft is provided, and an arc-shaped operating shaft guide is provided on the side surface of the holder so that the cam-shaped push piece can rotate together with the operating shaft around the drive shaft in response to rotation of the drive shaft. A hole is provided, and a coil spring is made to spring between the end of the operating shaft and the cut-and-raised part of the holder head, and when the switch is opened and the drive shaft is stopped by rotating the cam-shaped push piece, the An automatic return mechanism characterized in that the cam-shaped push piece can be automatically returned to its original position by a coil spring. (2) Utility model registration claim 1, characterized in that the bearing hole of the operating shaft provided in the cam-shaped pusher piece is an elongated hole, and the guide hole provided in the holder is in an inverted V-shape. Automatic return mechanism as described.