JPH0666332A - Transmission torque-adjustable one-way clutch - Google Patents
Transmission torque-adjustable one-way clutchInfo
- Publication number
- JPH0666332A JPH0666332A JP21810692A JP21810692A JPH0666332A JP H0666332 A JPH0666332 A JP H0666332A JP 21810692 A JP21810692 A JP 21810692A JP 21810692 A JP21810692 A JP 21810692A JP H0666332 A JPH0666332 A JP H0666332A
- Authority
- JP
- Japan
- Prior art keywords
- coil spring
- pitch
- inner diameter
- adjusting means
- way clutch
- 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- Withdrawn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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D41/00—Freewheels or freewheel clutches
- F16D41/20—Freewheels or freewheel clutches with expandable or contractable clamping ring or band
- F16D41/206—Freewheels or freewheel clutches with expandable or contractable clamping ring or band having axially adjacent coils, e.g. helical wrap-springs
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は伝達トルク調整可能型一
方向クラッチに係わり、コイルばねのピッチを加減し
て、被動側との巻き締め力を可変できる伝達トルク調整
可能型一方向クラッチに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission torque adjustable type one-way clutch, and more particularly to a transmission torque adjustable type one-way clutch in which the pitch of coil springs can be adjusted to vary the tightening force with the driven side.
【０００２】一方向クラッチは、一方向にだけ動力を伝
達するクラッチで、いろいろな動力の伝達系に用いられ
ている。その典型的な応用例は、ローラを用いたプリン
タの紙送り駆動伝達系である。すなわち、モータの回転
力をローラに伝える伝達系に一方向クラッチを介在させ
ると、紙送りローラはモータが停止した状態でも用紙の
紙送り方向には自由に回転できるので、手動による紙送
りが可能となる。A one-way clutch is a clutch that transmits power only in one direction, and is used in various power transmission systems. A typical application example thereof is a paper feed drive transmission system of a printer using rollers. In other words, by interposing a one-way clutch in the transmission system that transmits the rotational force of the motor to the roller, the paper feed roller can rotate freely in the paper feed direction even when the motor is stopped, so manual paper feed is possible. Becomes
【０００３】[0003]
【従来の技術】一方向クラッチは、駆動側が被動側を追
い越して回転することができるので追い越しクラッチな
どとも呼ばれ、球やローラを駆動側と被動側の間に一方
向だけくい込むようにしたもの、カムを用いたもの、ラ
チェットを用いたもの、軸に巻きつけたコイルばねの巻
き締め力を利用したものなど、いろいろ機構を用いたク
ラッチが目的に応じて用いられている。この中で、軸に
コイルばねを巻きつけた一方向クラッチは、機構も簡単
で小形に構成できるクラッチとして、小形プリンタの紙
送り系に有用である。2. Description of the Related Art A one-way clutch is also called an overtaking clutch because the drive side can pass over the driven side and rotate, and a ball or roller is inserted between the drive side and the driven side in only one direction. A clutch using various mechanisms such as one using a cam, one using a ratchet, one using a ratchet, and one utilizing the tightening force of a coil spring wound around a shaft is used according to the purpose. Among them, the one-way clutch in which a coil spring is wound around a shaft is useful in a paper feeding system of a small printer as a clutch having a simple mechanism and a small structure.
【０００４】図６はコイルばね巻きつけ型一方向クラッ
チの一例の模式的な説明図で、図６（Ａ）は駆動状態、
図６（Ｂ）は追越し状態を示す。図において、１は駆動
側、２は被動側、３はコイルばね、10は一方向クラッチ
である。FIG. 6 is a schematic explanatory view of an example of a coil spring winding type one-way clutch. FIG. 6A shows a driving state.
FIG. 6B shows an overtaking state. In the figure, 1 is a driving side, 2 is a driven side, 3 is a coil spring, and 10 is a one-way clutch.
【０００５】図に示した一方向クラッチ10の構成をプリ
ンタの紙送り機構を例にして説明すると、駆動側１は、
例えば図示してないモータによって回転駆動される外歯
歯車などである。被動側２は、例えば図示してないプラ
テンなどの紙送りローラである。そして、駆動側１と被
動側２の隙間にコイルばね３が介在している。このコイ
ルばね３の内径は、被動側２の外径よりも小さめになっ
ていて被動側２に巻きついており、一端部が駆動側１の
内径に支持されている。The structure of the one-way clutch 10 shown in the figure will be described by taking the paper feed mechanism of the printer as an example.
For example, it is an external gear that is rotationally driven by a motor (not shown). The driven side 2 is a paper feed roller such as a platen (not shown). The coil spring 3 is interposed in the gap between the driving side 1 and the driven side 2. The inner diameter of the coil spring 3 is smaller than the outer diameter of the driven side 2 and is wound around the driven side 2. One end of the coil spring 3 is supported by the inner diameter of the driving side 1.
【０００６】図６（Ａ）において、駆動側１が実線矢印
の方向に正回転すると、コイルばね３が巻き締められて
内径が小さくなる。その結果、被動側２がコイルばね３
によって巻き締められ、その巻き締めによる摩擦力によ
って被動側２が追動して回転する。この状態が駆動状態
である。In FIG. 6 (A), when the drive side 1 rotates forward in the direction of the solid line arrow, the coil spring 3 is wound and tightened to reduce the inner diameter. As a result, the driven side 2 is the coil spring 3
The driven side 2 is driven to rotate by the frictional force caused by the winding. This state is the driving state.
【０００７】図６（Ｂ）において、駆動側１が実線矢印
の方向に逆回転すると、コイルばね３が巻き解かれて内
径が大きくなる。そして、コイルばね３と被動側２の摩
擦力が無視できて滑るようになると、駆動側１と被動側
２の回転運動は互いに独立になる。換言すれば、駆動側
１が逆回転していても停止していても、被動側２は破線
矢印の方向に自由に回転することができる。この状態が
追越し状態で、オーバーランニングとも呼ばれる。In FIG. 6 (B), when the drive side 1 is rotated in the direction of the solid arrow in the opposite direction, the coil spring 3 is unwound and the inner diameter increases. Then, when the frictional force between the coil spring 3 and the driven side 2 becomes negligible and slips, the rotational movements of the driving side 1 and the driven side 2 become independent from each other. In other words, the driven side 2 can freely rotate in the direction of the dashed arrow, whether the driving side 1 is rotating in the reverse direction or stopped. This state is the overtaking state and is also called overrunning.
【０００８】このように、コイルばね３の巻き締め力を
利用した一方向クラッチ10は、コイルばね３を被動側２
に複数回巻きつけた簡単や構成なので、ミニプリンタな
どと呼ばれる小形のプリンタの紙送り機構などに取り付
けて用いられている。As described above, in the one-way clutch 10 utilizing the winding tightening force of the coil spring 3, the coil spring 3 is connected to the driven side 2.
Since it has a simple structure and is wrapped around multiple times, it is used by being attached to the paper feed mechanism of a small printer called a mini printer.
【０００９】[0009]
【発明が解決しようとする課題】ところが、このような
コイルばね巻きつけ型の従来の一方向クラッチ10は、被
動側２の外径とコイルばね３の内径の摩擦力によってト
ルクの伝達を実現しているので、相互の寸法精度が重要
となる。However, such a conventional one-way clutch 10 of the coil spring winding type realizes torque transmission by the frictional force between the outer diameter of the driven side 2 and the inner diameter of the coil spring 3. Therefore, mutual dimensional accuracy is important.
【００１０】つまり、被動側２の外径がコイルばね３の
内径よりも小さい場合には、駆動側１が正回転しても被
動側２が巻き締められず追動しない。また、被動側２の
外径がコイルばね３の内径よりも大き過ぎると、駆動側
１が逆回転しても被動側２が滑らず、被動側２が追越し
しなくなる。That is, when the outer diameter of the driven side 2 is smaller than the inner diameter of the coil spring 3, the driven side 2 is not wound and does not follow even if the driving side 1 rotates forward. If the outer diameter of the driven side 2 is larger than the inner diameter of the coil spring 3, the driven side 2 will not slip even if the driving side 1 rotates in the reverse direction, and the driven side 2 will not pass.
【００１１】さらに、駆動側１の大きなトルクを所定の
範囲内に制限して被動側２に伝達するような場合には、
被動側２の外径寸法とコイルばね３の内径寸法に厳しい
精度が必要となり、このような一方向クラッチを実現す
ることは困難である。Further, when the large torque on the driving side 1 is limited within a predetermined range and is transmitted to the driven side 2,
It is difficult to realize such a one-way clutch because the outer diameter of the driven side 2 and the inner diameter of the coil spring 3 require strict accuracy.
【００１２】そこで本発明は、コイルばねのピッチを加
減して内径を調整し、被動側との巻き締め力を可変でき
る伝達トルク調整可能型一方向クラッチを提供すること
を目的としている。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a transmission torque adjustable one-way clutch in which the inner diameter is adjusted by adjusting the pitch of the coil spring and the tightening force with the driven side can be varied.
【００１３】[0013]
【課題を解決するための手段】上で述べた課題は、回転
駆動される円筒状の駆動側と、該駆動側に内嵌して回動
自在に軸支された円柱状の被動側と、コイルばねと、ピ
ッチ調整手段を有し、前記コイルばねは、前記被動側２
に複数回の巻き数で外嵌しており、かつ一端部が前記駆
動側の内径壁に支持されているものであり、前記ピッチ
調整手段は、前記コイルばねのピッチを調整するもので
あって、前記駆動側に前進・後退可能に内嵌して前記コ
イルばねの他端部に衝合しているものであり、前記コイ
ルばねは、前記ピッチ調整手段が、前進した際にはピッ
チが狭くなって内径が大きくなり、後退した際にはピッ
チが広くなって内径が小さくなるように構成された伝達
トルク調整可能型一方向クラッチによって解決される。Means for Solving the Problems The problems described above include a cylindrical driving side that is rotationally driven, and a cylindrical driven side that is rotatably supported and is internally fitted in the driving side. A coil spring and a pitch adjusting means are provided, and the coil spring is provided on the driven side 2
Is externally fitted with a plurality of turns, and one end is supported by the inner diameter wall on the drive side, and the pitch adjusting means adjusts the pitch of the coil spring. The coil spring is fitted in the drive side so as to be able to move forward and backward, and abuts against the other end of the coil spring. The coil spring has a narrow pitch when the pitch adjusting means moves forward. This is solved by a transmission torque adjustable one-way clutch that is configured such that the inner diameter becomes large and the pitch becomes wide so that the inner diameter becomes small when retracted.
【００１４】[0014]
【作用】図５は本発明になる一方向クラッチの動作原理
の説明図である。図において、１は駆動側、２は被動
側、３はコイルばね、４はピッチ調整手段である。FIG. 5 is an explanatory view of the operating principle of the one-way clutch according to the present invention. In the figure, 1 is a driving side, 2 is a driven side, 3 is a coil spring, and 4 is a pitch adjusting means.
【００１５】被動側２の直径：Ｄ1 コイルばね３の内径：Ｄ2 →Ｄ2 ’（調整後） コイルばね３の線材の直径：ｄ コイルばね３のピッチ：ｐ→ｐ’（調整後） コイルばね３の巻き数：ｎ→ｎ’（調整後） コイルばね３の軸方向の長さ：ｌ→ｌ’（調整後）とす
る。Diameter of driven side 2: D 1 Inner diameter of coil spring 3: D 2 → D 2 '(after adjustment) Diameter of wire material of coil spring 3: d Pitch of coil spring 3: p → p' (after adjustment) The number of turns of the coil spring 3 is n → n ′ (after adjustment). The axial length of the coil spring 3 is 1 → l ′ (after adjustment).
【００１６】被動側２はコイルばね３に比較して変形し
難いとして無視する。また、コイルばね３は、その内径
がＤ2 からＤ1 に変化したことによって生じる曲げによ
ってもたらされる応力と考える。コイルばね３の断面形
状を真円とし、曲げ変形による応力を算出する。The driven side 2 is ignored because it is less likely to be deformed than the coil spring 3. Further, the coil spring 3 is considered to be stress caused by bending caused by the change of the inner diameter from D 2 to D 1 . The cross-sectional shape of the coil spring 3 is a perfect circle, and the stress due to bending deformation is calculated.
【００１７】コイルばね３の巻きピッチ径が（Ｄ2 ＋
ｄ）から（Ｄ1 ＋ｄ）に変化したとき、その全周にわた
って純曲げモーメント：Ｍが働くものとし、コイルばね
３の断面係数：Ｉ＝πｄ4 ／64とおいて、 Ｍ＝ＥＩ（２／（Ｄ2 ＋ｄ）−２／（Ｄ1 ＋ｄ））───────（１） このとき、コイルばね３の内径面と被動側２の外周面の
間に、圧力：ｆが働くものとすると、 ｆ＝２Ｍ／（Ｄ1 ＋ｄ）───────────────────（２） で表される。従って、（１）式を（２）式に代入して、 ｆ＝２ＥＩ（２／（Ｄ1 ＋ｄ）−２／（Ｄ2 ＋ｄ））／（Ｄ1 ＋ｄ） ＝４ＥＩ（Ｄ1 −Ｄ2 ）／（Ｄ1 ＋ｄ) 2 （Ｄ1 ＋ｄ）────（３） このような関係にある被動側２とコイルばね３におい
て、コイルばね３の一端を巻き締める方向に回転させる
とき、被動側２の外周面とコイルばね３の内径面との間
に働く摩擦力：Ｆは、摩擦係数：μとおき、コイルばね
３の他端には線材の軸方向（らせん方向）の力がないと
し、そのコイルばね３の他端を始点としコイルばね３の
一端までに至る中心角：θとして、 Ｆ＝ｆ（μθ＋ｅｘｐ（μθ））───────────────（４） 本発明においては、コイルばね３のピッチ：ｐをｐ’に
調整して内径：Ｄ2 をＤ2 ’とすることによって、
（４）式で示した摩擦力：Ｆを最適な値にしようとする
ものである。The winding pitch diameter of the coil spring 3 is (D 2 +
When changes from d) (D 1 + d) , pure bending moment along the full circumference thereof: and shall M works, the section modulus of the coil spring 3 at the I = πd 4/64, M = EI (2 / ( D 2 + d) -2 / (D 1 + d)) ───────── (1) At this time, pressure f acts between the inner diameter surface of the coil spring 3 and the outer peripheral surface of the driven side 2. Then, f = 2M / (D 1 + d) ───────────────────── (2) Thus, (1) by substituting expression (2) where, f = 2EI (2 / ( D 1 + d) -2 / (D 2 + d)) / (D 1 + d) = 4EI (D 1 -D 2 ) / (D 1 + d) 2 (D 1 + d) ─────── (3) In the driven side 2 and the coil spring 3 having such a relationship, when one end of the coil spring 3 is rotated in the tightening direction, the driven side is rotated. The frictional force F acting between the outer peripheral surface of the side 2 and the inner diameter surface of the coil spring 3 is a friction coefficient: μ, and there is no force in the axial direction (helical direction) of the wire at the other end of the coil spring 3. And the central angle from the other end of the coil spring 3 to the one end of the coil spring 3 is θ: F = f (μθ + exp (μθ)) ──────────────── in (4) the present invention, the pitch of the coil spring 3 by a,: 'a D 2 D 2 is adjusted to the inside diameter' a p p
The frictional force F expressed by the equation (4) is to be optimized.
【００１８】同じコイルばね３を用いて、ピッチ調整手
段４によって軸方向に圧縮力を加えると、線材のねじれ
変形によってピッチ：ｐがｐ’に小さくなる。コイルば
ね３の全長は変化しないので、ｐ→ｐ’になった分だけ
内径：Ｄ2 がＤ2 ’に大きくなる。When the same coil spring 3 is used to apply a compressive force in the axial direction by the pitch adjusting means 4, the pitch: p is reduced to p'due to the torsional deformation of the wire. Since the total length of the coil spring 3 does not change, the inner diameter D 2 increases to D 2 ′ by the amount of p → p ′.
【００１９】こゝで、Ｄ2 、ｐ、Ｄ2 ’、ｐ’の関係
は、 （πＤ2 ）2 ＋ｐ2 ＝（πＤ2 ’）2 ＋ｐ’2 ─────────（４） で表される。Here, the relationship between D 2 , p, D 2 'and p'is (πD 2 ) 2 + p 2 = (πD 2 ') 2 + p ' 2 ───────── (4 ) Is represented by.
【００２０】（２）式において、Ｄ2 ’＝Ｄ1 、つまり
調整後のコイルばね３の内径が被動側２の直径と等しい
場合には、被動側２とコイルばね３の間に相互の力が働
かず、自由に滑ることになる。In the equation (2), when D 2 '= D 1 , that is, when the adjusted inner diameter of the coil spring 3 is equal to the diameter of the driven side 2, the mutual force between the driven side 2 and the coil spring 3 is increased. Will not work and will slip freely.
【００２１】こうして、本発明においては、ピッチ調整
手段４によってコイルばね３のピッチ：ｐを加減して内
径：Ｄ2 を調整し、被動側２とコイルばね３の摩擦力：
Ｆを最適値にして上記の課題を解決した一方向クラッチ
を実現することができる。Thus, in the present invention, the pitch adjusting means 4 adjusts the pitch: p of the coil spring 3 to adjust the inner diameter: D 2 , and the frictional force between the driven side 2 and the coil spring 3:
It is possible to realize a one-way clutch that solves the above problems by setting F to an optimum value.
【００２２】[0022]
【実施例】図１は本発明の第一の実施例の一部切欠き斜
視図、図２はピッチの調整を説明する側断面図で、図２
（Ａ）はピッチを狭くした状態、図２（Ｂ）はピッチを
広くした状態、図３は本発明の第二の実施例の主要部の
模式的断面図、図４は本発明の第三の実施例の主要部の
模式的断面図である。図において、１は駆動側、1aは支
持孔、1bは雌ねじ、２は被動側、３はコイルばね、４は
ピッチ調整手段、4aは球受け板、4bは球、4cはばね押さ
え板、4dは雄ねじ、10は一方向クラッチである。1 is a partially cutaway perspective view of a first embodiment of the present invention, and FIG. 2 is a side sectional view for explaining pitch adjustment.
2A is a state where the pitch is narrowed, FIG. 2B is a state where the pitch is widened, FIG. 3 is a schematic cross-sectional view of the main part of the second embodiment of the present invention, and FIG. It is a schematic cross-sectional view of the main part of the embodiment of. In the figure, 1 is a driving side, 1a is a supporting hole, 1b is a female screw, 2 is a driven side, 3 is a coil spring, 4 is a pitch adjusting means, 4a is a ball receiving plate, 4b is a ball, 4c is a spring pressing plate, and 4d. Is a male screw and 10 is a one-way clutch.
【００２３】実施例：１ 図１に示した本発明になる一方向クラッチ10において、
駆動側１は円筒状をなしており、図示してないモータな
どの駆動源によって回転駆動されるようになっている。
その駆動側１の内部には、円柱状の被動側２が自在に回
動できるように軸支されている。この被動側２は、図示
してないが例えばプリンタの紙送りローラなどとなって
いる。Embodiment 1 In the one-way clutch 10 according to the present invention shown in FIG.
The drive side 1 has a cylindrical shape and is rotationally driven by a drive source such as a motor (not shown).
Inside the driving side 1, a cylindrical driven side 2 is pivotally supported so as to be freely rotatable. Although not shown, the driven side 2 is, for example, a paper feed roller of a printer.
【００２４】コイルばね３は、断面形状が丸い線材を５
回とか７回とか巻いたコイル状のばねからなる。そし
て、コイルばね３の内径寸法は、被動側２の外径寸法よ
りも例えば３／100 程度小さくなっており、被動側２に
渋く外嵌する。そして、その一端部は駆動側１の内径壁
に設けた支持孔1aに支持されている。The coil spring 3 is made of a wire material having a round cross section.
It consists of a coiled spring wound around 7 or 7 turns. The inner diameter of the coil spring 3 is smaller than the outer diameter of the driven side 2 by, for example, about 3/100, so that the coil spring 3 fits tightly on the driven side 2. Then, one end thereof is supported by a support hole 1a provided in the inner diameter wall of the driving side 1.
【００２５】ピッチ調整手段４は、コイルばね３を押し
込んだり引き戻したりして、コイルばね３のピッチを調
整することに用いる。すなわち、球受け板4aに複数個の
球4bが配設され、その球4bによって自在に回動するばね
押さえ板4cが支持された構成になっている。この構成は
いわゆる単式スラスト軸受である。そして、球受け板4a
の外径面には雄ねじ4dが設けてある。The pitch adjusting means 4 is used for adjusting the pitch of the coil spring 3 by pushing in or pulling back the coil spring 3. That is, a plurality of balls 4b are arranged on the ball receiving plate 4a, and the spring pressing plate 4c which is freely rotatable by the balls 4b is supported. This structure is a so-called single type thrust bearing. And the ball receiving plate 4a
An external thread 4d is provided on the outer diameter surface of the.
【００２６】一方、駆動側１の内径面には雌ねじ1bが設
けてあり、ピッチ調整手段４の球受け板4aに設けた雄ね
じ4dと螺合するようになっている。そして、ピッチ調整
手段４のばね押さえ板4cがコイルばね３の他端部に衝合
するようにピッチ調整手段４をねじ込むと、ピッチ調整
手段４が駆動側１の中で前進してコイルばね３を押圧し
てピッチが狭くなる。逆にピッチ調整手段４をねじ戻す
と、ピッチ調整手段４が後退してコイルばね３の付勢に
よってピッチが広くなる。On the other hand, a female screw 1b is provided on the inner diameter surface of the driving side 1 so as to be screwed with a male screw 4d provided on the ball receiving plate 4a of the pitch adjusting means 4. Then, when the pitch adjusting means 4 is screwed so that the spring pressing plate 4c of the pitch adjusting means 4 abuts against the other end of the coil spring 3, the pitch adjusting means 4 advances in the drive side 1 and the coil spring 3 Press to narrow the pitch. Conversely, when the pitch adjusting means 4 is unscrewed, the pitch adjusting means 4 retracts and the pitch is widened by the biasing force of the coil spring 3.
【００２７】ところで、ピッチ調整手段４を前進させて
コイルばね３を押圧し、コイルばね３のピッチが狭くな
ると、図２（Ａ）に示したように、コイルばね３の内径
が大きくなる。そして、コイルばね３の内径が被動側２
の外径に及ぼす圧力が低下する。また、図２（Ｂ）に示
したように、ピッチ調整手段４を後退させてコイルばね
３を引き戻すと、コイルばね３のピッチが広くなり、コ
イルばね３の内径が小さくなる。その結果、コイルばね
３の内径が被動側２の外径に及ぼす圧力が増大し、いわ
ゆるコイルばね３の被動側２に対する巻き締め力が増大
する。By the way, when the pitch adjusting means 4 is advanced to press the coil spring 3 and the pitch of the coil spring 3 becomes narrow, the inner diameter of the coil spring 3 becomes large as shown in FIG. 2 (A). The inner diameter of the coil spring 3 is the driven side 2
The pressure exerted on the outer diameter of is reduced. Further, as shown in FIG. 2B, when the pitch adjusting means 4 is retracted and the coil spring 3 is pulled back, the pitch of the coil spring 3 becomes wider and the inner diameter of the coil spring 3 becomes smaller. As a result, the pressure exerted by the inner diameter of the coil spring 3 on the outer diameter of the driven side 2 increases, and the so-called coiling force of the coil spring 3 on the driven side 2 increases.
【００２８】こうして、ピッチ調整手段４の前進・後退
によって、コイルばね３の内径が被動側２の外径に及ぼ
す圧力を小さくしたり大きくしたりすることができる。
この圧力を最適に調整すれば、例えばプリンタにおい
て、図示してないモータによって駆動される駆動側１の
回転力が被動側２のローラに伝達され、用紙を円滑に紙
送りすることができる。そして、用紙がジャムなどを起
こして被動側２のローラに所定値以上の回転抵抗が生じ
た場合には、コイルばね３が被動側２を滑って用紙の紙
送りを一定の限度内に抑えることができる。In this way, the pressure exerted by the inner diameter of the coil spring 3 on the outer diameter of the driven side 2 can be reduced or increased by moving the pitch adjusting means 4 forward and backward.
By optimally adjusting this pressure, for example, in a printer, the rotational force of the driving side 1 driven by a motor (not shown) is transmitted to the roller of the driven side 2, and the sheet can be smoothly fed. When the paper jams or the like and the roller on the driven side 2 has a rotation resistance of a predetermined value or more, the coil spring 3 slides on the driven side 2 to suppress the paper feeding of the paper within a certain limit. You can
【００２９】こうした調整は、被動側２の外径寸法やコ
イルばね３の内径寸法などの厳しい加工精度に係わら
ず、ピッチ調整手段４の前進・後退によって選択設定す
ることができる。そしてその結果、安定で均一な性能を
もった一方向クラッチを得ることができる。Such adjustment can be selectively set by advancing / retracting the pitch adjusting means 4 regardless of severe machining accuracy such as the outer diameter of the driven side 2 and the inner diameter of the coil spring 3. As a result, a one-way clutch with stable and uniform performance can be obtained.
【００３０】実施例：２ 図３において、被動側２に外嵌するコイルばね３を構成
する線材の断面形状が円形に近い楕円形をなし、その長
径が外嵌する被動側２の軸方向に対して垂直になってい
る。Example 2: 2 In FIG. 3, the wire rod constituting the coil spring 3 fitted on the driven side 2 has an elliptical cross-sectional shape close to a circle, and its major axis is in the axial direction of the driven side 2 fitted on the outside. It is perpendicular to it.
【００３１】こうすると、ピッチ調整手段４の前進・後
退によって、コイルばね３のピッチを増減した際、円形
断面のコイルばね３を用いたときよりも、コイルばね３
の内径の変化を大きくすることができる。その結果、コ
イルばね３の内径が被動側２の外径面に及ぼす圧力の変
化を大きくすることができる。With this arrangement, when the pitch of the coil spring 3 is increased or decreased by the forward / backward movement of the pitch adjusting means 4, the coil spring 3 has a circular cross section as compared with the case of using the coil spring 3.
The change in the inner diameter of the can be increased. As a result, the change in pressure exerted by the inner diameter of the coil spring 3 on the outer diameter surface of the driven side 2 can be increased.
【００３２】実施例：３ 図４において、被動側２に外嵌するコイルばね３を構成
する線材の断面形状が円形に近い楕円形をなし、その長
径が外嵌する被動側２の軸方向に対して平行になってい
る。Example 3: 3 In FIG. 4, the wire rod constituting the coil spring 3 fitted on the driven side 2 has an elliptical cross-sectional shape close to a circle, and its major axis is in the axial direction of the driven side 2 fitted on the outside. They are parallel to each other.
【００３３】こうすると、ピッチ調整手段４の前進・後
退によって、コイルばね３のピッチを増減した際、円形
断面のコイルばね３を用いたときよりも、コイルばね３
の内径の変化を小さくすることができる。その結果、コ
イルばね３の内径が被動側２の外径面に及ぼす圧力の変
化をより細かく微調整することができる。With this arrangement, when the pitch of the coil spring 3 is increased / decreased by the forward / backward movement of the pitch adjusting means 4, the coil spring 3 is larger than the coil spring 3 having a circular cross section.
The change in the inner diameter of the can be reduced. As a result, the change in pressure exerted by the inner diameter of the coil spring 3 on the outer diameter surface of the driven side 2 can be finely and finely adjusted.
【００３４】[0034]
【発明の効果】コイルばねの巻き締め力を応用した従来
の一方向クラッチは、被動側の外径とコイルばねの内径
の寸法精度を厳しく抑えても均一な性能が得難かった
が、本発明によれば、コイルばねのピッチを可変するピ
ッチ調整手段を設けることによって、どのようにも、被
動側とコイルばねの摩擦力を調整することができる。EFFECTS OF THE INVENTION In the conventional one-way clutch applying the coil spring tightening force, it is difficult to obtain uniform performance even if the dimensional accuracy of the outer diameter of the driven side and the inner diameter of the coil spring is strictly suppressed. According to this, by providing the pitch adjusting means for varying the pitch of the coil spring, the frictional force between the driven side and the coil spring can be adjusted in any way.
【００３５】その結果、特性の均一な安定した一方向ク
ラッチを得ることができるようになる。そして、特に機
構が簡便なので、小形で安価なプリンタの紙送り駆動機
構に適用したいコイルばね巻きつけ型一方向クラッチの
実現に対して、本発明は寄与するところが大である。As a result, a stable one-way clutch with uniform characteristics can be obtained. Since the mechanism is particularly simple, the present invention greatly contributes to the realization of a coil spring winding type one-way clutch which is desired to be applied to a paper feed drive mechanism of a small and inexpensive printer.
【図１】 本発明の第一の実施例の一部切欠き斜視図で
ある。FIG. 1 is a partially cutaway perspective view of a first embodiment of the present invention.
【図２】 ピッチの調整を説明する側断面図で、（Ａ）
はピッチを狭くした状態、（Ｂ）はピッチを広くした状
態である。FIG. 2 is a side sectional view illustrating pitch adjustment, (A).
Shows a state where the pitch is narrowed, and (B) shows a state where the pitch is widened.
【図３】 本発明の第二の実施例の主要部の模式的断面
図である。FIG. 3 is a schematic sectional view of a main part of a second embodiment of the present invention.
【図４】 本発明の第三の実施例の主要部の模式的断面
図である。FIG. 4 is a schematic sectional view of a main part of a third embodiment of the present invention.
【図５】 本発明になる一方向クラッチの動作原理の説
明図である。FIG. 5 is an explanatory diagram of the operating principle of the one-way clutch according to the present invention.
【図６】 コイルばね巻きつけ型一方向クラッチの一例
の模式的な説明図である。FIG. 6 is a schematic explanatory view of an example of a coil spring winding type one-way clutch.
１ 駆動側 1a 支持孔 1b
雌ねじ ２ 被動側 ３ コイルばね ４ ピッチ調整手段 4a 球受け板 4b
球 4c ばね押さえ板 4d 雄ねじ 10 一方向クラッチ1 Drive side 1a Support hole 1b
Female screw 2 Driven side 3 Coil spring 4 Pitch adjusting means 4a Ball receiving plate 4b
Ball 4c Spring retainer plate 4d Male screw 10 One-way clutch
Claims (4)
該駆動側(1) に内嵌して回動自在に軸支された円柱状の
被動側(2) と、コイルばね(3) と、ピッチ調整手段(4)
を有し、 前記コイルばね(3) は、前記被動側(2) に複数回の巻き
数で外嵌しており、かつ一端部が前記駆動側(1) の内径
壁に支持されているものであり、 前記ピッチ調整手段(4) は、前記コイルばね(3) のピッ
チを調整するものであって、前記駆動側(1) に前進・後
退可能に内嵌して前記コイルばね(3) の他端部に衝合し
ているものであり、 前記コイルばね(3) は、前記ピッチ調整手段(4) が、前
進した際にはピッチが狭くなって内径が大きくなり、後
退した際にはピッチが広くなって内径が小さくなること
を特徴とする伝達トルク調整可能型一方向クラッチ。1. A cylindrical driving side (1) which is rotationally driven,
A cylindrical driven side (2) rotatably supported by being fitted into the driving side (1), a coil spring (3), and a pitch adjusting means (4)
The coil spring (3) is fitted onto the driven side (2) with a plurality of turns, and one end thereof is supported by the inner diameter wall of the driving side (1). The pitch adjusting means (4) is for adjusting the pitch of the coil spring (3), and the coil spring (3) is fitted in the drive side (1) so as to be able to move forward and backward. When the pitch adjusting means (4) moves forward, the pitch narrows and the inner diameter increases, and when the pitch adjusting means (4) moves backward, the coil spring (3) collides with the other end. Is a one-way clutch with adjustable transmission torque, which has a wider pitch and a smaller inner diameter.
被動側(2) に遊嵌し、かつ外径が前記駆動側(1) に螺嵌
された単式スラスト軸受からなる請求項１記載の伝達ト
ルク調整可能型一方向クラッチ。2. The pitch adjusting means (4) comprises a single thrust bearing having an inner diameter loosely fitted to the driven side (2) and an outer diameter threadedly fitted to the drive side (1). A described transmission torque adjustable type one-way clutch.
状を有して、長径が長手方向に対して垂直である請求項
１記載の伝達トルク調整可能型一方向クラッチ。3. The transmission torque adjustable one-way clutch according to claim 1, wherein the coil spring (3) has an elliptical cross-sectional shape, and a major axis is perpendicular to a longitudinal direction.
状を有して、長径が長手方向に対して平行である請求項
１記載の伝達トルク調整可能型一方向クラッチ。4. The transmission torque adjustable type one-way clutch according to claim 1, wherein the coil spring (3) has an elliptical cross-sectional shape, and a major axis is parallel to a longitudinal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21810692A JPH0666332A (en) | 1992-08-18 | 1992-08-18 | Transmission torque-adjustable one-way clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21810692A JPH0666332A (en) | 1992-08-18 | 1992-08-18 | Transmission torque-adjustable one-way clutch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0666332A true JPH0666332A (en) | 1994-03-08 |
Family
ID=16714731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21810692A Withdrawn JPH0666332A (en) | 1992-08-18 | 1992-08-18 | Transmission torque-adjustable one-way clutch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0666332A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0883119A2 (en) * | 1997-06-03 | 1998-12-09 | Mitsubishi Denki Kabushiki Kaisha | One-way clutch and brake control device using the one-way clutch |
| DE102004017415A1 (en) * | 2004-04-08 | 2005-10-27 | Giesecke & Devrient Gmbh | Friction clutch for use in banknote processing machine, has clutch component frictionally connected with one of drive or output units, and positively connected with other of drive or output units |
| WO2008061749A1 (en) * | 2006-11-23 | 2008-05-29 | Ixetic Hückeswagen Gmbh | Pump |
| JP2015209945A (en) * | 2014-04-28 | 2015-11-24 | 京セラドキュメントソリューションズ株式会社 | Torque adjustment mechanism of revolving shaft, and paper conveying device |
-
1992
- 1992-08-18 JP JP21810692A patent/JPH0666332A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0883119A2 (en) * | 1997-06-03 | 1998-12-09 | Mitsubishi Denki Kabushiki Kaisha | One-way clutch and brake control device using the one-way clutch |
| EP0883119A3 (en) * | 1997-06-03 | 1999-04-14 | Mitsubishi Denki Kabushiki Kaisha | One-way clutch and brake control device using the one-way clutch |
| US6113021A (en) * | 1997-06-03 | 2000-09-05 | Mitsubishi Denki Kabushiki Kaisha | One-way clutch and brake control device using the one-way clutch |
| DE102004017415A1 (en) * | 2004-04-08 | 2005-10-27 | Giesecke & Devrient Gmbh | Friction clutch for use in banknote processing machine, has clutch component frictionally connected with one of drive or output units, and positively connected with other of drive or output units |
| WO2008061749A1 (en) * | 2006-11-23 | 2008-05-29 | Ixetic Hückeswagen Gmbh | Pump |
| JP2015209945A (en) * | 2014-04-28 | 2015-11-24 | 京セラドキュメントソリューションズ株式会社 | Torque adjustment mechanism of revolving shaft, and paper conveying device |
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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: 19991102 |