JPH07279989A - Spring clutch - Google Patents

Spring clutch

Info

Publication number
JPH07279989A
JPH07279989A JP6097914A JP9791494A JPH07279989A JP H07279989 A JPH07279989 A JP H07279989A JP 6097914 A JP6097914 A JP 6097914A JP 9791494 A JP9791494 A JP 9791494A JP H07279989 A JPH07279989 A JP H07279989A
Authority
JP
Japan
Prior art keywords
spring
output side
output
rotation
input side
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.)
Pending
Application number
JP6097914A
Other languages
Japanese (ja)
Inventor
Kazuhiko Namiki
和彦 並木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP6097914A priority Critical patent/JPH07279989A/en
Publication of JPH07279989A publication Critical patent/JPH07279989A/en
Pending legal-status Critical Current

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  • Mechanical Operated Clutches (AREA)
  • One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
  • Electrophotography Configuration And Component (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)

Abstract

PURPOSE:To prevent an output side rotary member from rotating following rotation of an input side rotary member when no torque is transmitted from the input side rotary member to the output side rotary member. CONSTITUTION:In a spring clutch composed of an input side rotary member 1, an output side rotary member 120 and a spring 7 stretched between and on the input and output rotary members, a friction pad 16 is made into press contact with a bracket 10, for preventing the output rotary member 120 from rotating following the rotation of the input side rotary member 1 at the time when the rotation of the input side rotary member is not transmitted to the output rotary member. The friction pad 16 is fixed to a disc 17 which is attached to the output side rotary member 120, relatively unrotatably thereto.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、コイル状のスプリング
を用いたスプリングクラッチに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring clutch using a coiled spring.

【0002】[0002]

【従来の技術】各種機械装置に使用されるスプリングク
ラッチは、周知のように、入力側回転部材と、出力側回
転部材との間の回転伝達関係を、選択的に連断するもの
である。かようなスプリングクラッチのうち、入力側回
転部材と出力側回転部材とを互いに相対回転可能に嵌合
させるようにしたものがあるが、このようなものでは、
入力側回転部材から出力側回転部材への回転伝達の断切
時に、入力側回転部材が回転しているため、両回転部材
の嵌合部における摩擦力により、出力側回転部材が連れ
回りすることがある。このような連れ回りを起こすと、
色々な不都合を生じる。例えば、複写機、プリンタ或い
はファクシミリなどの画像形成装置において、感光体上
のトナー像を転写ベルトに転写する方式のもので、転写
ベルトのホームポジションが決まっていて、かかる転写
ベルトがスプリングクラッチの出力側回転部材によって
駆動される構成の場合、転写ベルトをホームポジション
に停止させておくべく、入力側回転部材から出力側回転
部材への回転伝達を断切しているとき、両回転部材の嵌
合部における摩擦力によって、出力側回転部材が連れ回
りしてしまうと、転写ベルトのホームポジションが狂っ
てしまう。
2. Description of the Related Art As is well known, a spring clutch used in various mechanical devices selectively disconnects a rotation transmission relationship between an input side rotating member and an output side rotating member. Among such spring clutches, there is one in which the input side rotation member and the output side rotation member are fitted so as to be rotatable relative to each other.
Since the input side rotating member is rotating when the rotation transmission from the input side rotating member to the output side rotating member is cut off, the output side rotating member may rotate together due to the frictional force in the fitting portion of both rotating members. is there. When you make such a roundabout,
It causes various inconveniences. For example, in an image forming apparatus such as a copying machine, a printer, or a facsimile, which transfers a toner image on a photoconductor onto a transfer belt, a home position of the transfer belt is determined, and the transfer belt outputs a spring clutch. In the case of the structure driven by the side rotation member, the fitting portion of both rotation members is cut off when the rotation transmission from the input side rotation member to the output side rotation member is cut off in order to keep the transfer belt at the home position. If the output-side rotating member rotates together due to the frictional force in the, the home position of the transfer belt will be misaligned.

【0003】従来のこの種のスプリングクラッチには、
かような連れ回りの防止手段が設けられておらず、かか
る連れ回わりが発生するおそれを免れなかった。なお、
この種の技術に関連するものとして、例えば、特開平1
−279121号公報などによるものが既に提案されて
いる。
A conventional spring clutch of this type is
There is no means for preventing such entrainment, and there is a risk that such entrainment may occur. In addition,
As a technique related to this kind of technology, for example, Japanese Patent Laid-Open No.
The one disclosed in Japanese Patent Publication No. 279121 has already been proposed.

【0004】[0004]

【発明が解決しようとする課題】本発明の目的は、入力
側回転部材から出力側回転部材に対して回転駆動力を伝
達しないとき、回転している入力側回転部材によって出
力側回転部材が連れ回りするのを防止できるようにした
スプリングクラッチを提供することにある。
SUMMARY OF THE INVENTION It is an object of the present invention to prevent the output side rotating member from rotating by the rotating input side rotating member when the rotational driving force is not transmitted from the input side rotating member to the output side rotating member. (EN) Provided is a spring clutch capable of preventing rotation.

【0005】[0005]

【課題を解決するための手段】本発明は、上記目的を達
成するため、回転駆動される入力側回転部材と、該入力
側回転部材に対して相対回転可能に嵌合した出力側回転
部材と、両回転部材に跨って巻き付けられ、一端が出力
側回転部材に係止されたコイル状のスプリングと、前記
入力側回転部材に対して相対回転可能となっていて、か
つ前記スプリングの他端を係止するスプリング規制部材
と、入力側回転部材から出力側回転部材への回転伝達を
断切するとき、入力側回転部材と出力側回転部材が前記
スプリングを介して駆動連結されないように、前記スプ
リング規制部材を回転不能に拘束すると共に、入力側回
転部材の回転を出力側回転部材に伝達するとき、前記ス
プリングが入力側回転部材と出力側回転部材を締付けて
両回転部材がスプリングを介して駆動連結されるよう
に、前記拘束を解除する手段と、前記回転伝達の断切時
に、回転している入力側回転部材に対して、両回転部材
の嵌合部における摩擦力により、出力側回転部材が連れ
回りするのを防止する出力側回転部材制動手段とを具備
したスプリングクラッチを提案するものである。
In order to achieve the above object, the present invention provides an input side rotating member which is rotationally driven, and an output side rotating member which is rotatably fitted to the input side rotating member. , A coiled spring wound over both rotating members, one end of which is locked to the output side rotating member, and the other end of the spring being rotatable relative to the input side rotating member. When the rotation transmission from the input side rotation member to the output side rotation member is cut off, the spring regulation member is locked so that the input side rotation member and the output side rotation member are not drive-coupled via the spring. When the rotation of the input side rotating member is transmitted to the output side rotating member while restraining the member non-rotatably, the spring tightens the input side rotating member and the output side rotating member, and both rotating members are spun So as to be drivingly connected via a ring, the means for releasing the restraint, and at the time of disconnection of the rotation transmission, with respect to the rotating input side rotating member, due to the frictional force in the fitting portions of both rotating members, The present invention proposes a spring clutch provided with an output side rotation member braking means that prevents the output side rotation member from rotating together.

【0006】その際、出力側回転部材制動手段は、出力
側回転部材に対して相対回転不能に支持され、かつ固定
部材に摩擦接触する摩擦部材を有していると、効果的で
ある。
At this time, it is effective that the output side rotation member braking means has a friction member which is supported so as not to be rotatable relative to the output side rotation member and which makes frictional contact with the fixed member.

【0007】又、出力側回転部材制動手段は、出力側回
転部材に対して相対回転不能であって、その軸方向に移
動可能に支持され、かつ固定部材に摩擦接触する摩擦部
材と、該摩擦部材を前記固定部材に対して加圧する弾性
部材と、該弾性部材による加圧力を調整する調整装置と
を有していると、効果的である。
Further, the output side rotating member braking means is a member which is not rotatable relative to the output side rotating member, is supported movably in the axial direction thereof, and is in frictional contact with the fixed member, and the friction member. It is effective to have an elastic member that presses the member against the fixing member and an adjusting device that adjusts the pressure applied by the elastic member.

【0008】[0008]

【実施例】以下、本発明の実施例を図面に従って詳細に
説明する。
Embodiments of the present invention will now be described in detail with reference to the drawings.

【0009】図1は、本発明一実施例のスプリングクラ
ッチの断面図である。同図において、符号1は、入力側
回転部材を示す。本例では、この入力側回転部材1が、
その外周面の全周に多数の歯部1Aが形成されたタイミ
ングプーリとなっているが、かかる入力側回転部材1と
して、歯車や、チェーンを掛け渡すスプロケットや、平
ベルト,Vベルトを掛け渡す通常のプーリや、摩擦車な
どの伝動部材を用いることもできる。入力側回転部材1
の歯部1Aには図示されないタイミングベルトが係合し
ており、かかるベルトが回転すると、入力側回転部材1
は、その中心軸線のまわりに一方向、例えば矢印a方向
に回転駆動される。
FIG. 1 is a sectional view of a spring clutch according to an embodiment of the present invention. In the figure, reference numeral 1 indicates an input side rotation member. In this example, the input side rotation member 1 is
The timing pulley has a large number of teeth 1A formed all around the outer peripheral surface thereof. As such an input side rotating member 1, a gear, a sprocket for hanging a chain, a flat belt, or a V belt is wound. A normal pulley or a transmission member such as a friction wheel can also be used. Input side rotating member 1
A timing belt (not shown) is engaged with the tooth portion 1A of the input side rotation member 1 when the belt rotates.
Is rotationally driven around its central axis in one direction, for example, the direction of arrow a.

【0010】入力側回転部材1の中心部の穴には出力側
回転部材120が同心状に、かつ相対回転可能に嵌合し
ている。このように出力側回転部材120は入力側回転
部材1に回転自在に嵌合しているが、本例ではかかる出
力側回転部材120が、スリーブ2と出力軸3とから構
成され、スリーブ2は出力軸3の外側にこれと同心状に
嵌め込まれて固定され、出力軸3と一体に回転するよう
に構成されている。スリーブ2の中空穴内に出力軸3が
一体に嵌め込まれているのであるが、スリーブ2と出力
軸3とを予め1つの部材で構成し、これを出力側回転部
材とすることもできる。出力側回転部材120は、入力
側回転部材1の支持軸を兼ねており、かかる出力側回転
部材120は機械装置の機枠の側板4と図示していない
他の側板に軸受5を介して回転自在に支持されている。
An output side rotating member 120 is concentrically and relatively rotatably fitted in a hole at the center of the input side rotating member 1. As described above, the output side rotation member 120 is rotatably fitted to the input side rotation member 1, but in the present example, the output side rotation member 120 is composed of the sleeve 2 and the output shaft 3, and the sleeve 2 is The output shaft 3 is concentrically fitted and fixed to the outside of the output shaft 3, and is configured to rotate integrally with the output shaft 3. The output shaft 3 is integrally fitted in the hollow hole of the sleeve 2. However, the sleeve 2 and the output shaft 3 may be preliminarily formed of one member and used as the output side rotating member. The output side rotating member 120 also serves as a support shaft of the input side rotating member 1, and the output side rotating member 120 is rotated by the side plate 4 of the machine frame of the mechanical device and another side plate (not shown) via the bearing 5. It is supported freely.

【0011】入力側回転部材1は、この部材の本体に嵌
合固定されたリング状部材6を有し、この部材6は、出
力側回転部材120と同心状に配置され、焼結合金など
の摩耗しにくい材料により構成されている。入力側回転
部材1のリング状部材6の外周面と、出力側回転部材1
20におけるスリーブ2の増径部2aの外周面とには、
コイル状のスプリング7が巻き付けられている。このよ
うにスプリング7は、入力側と出力側の両回転部材1,
120に跨って巻き付けられ、その巻き付け前のフリー
状態にあるときは、その内径がリング状部材6の外周部
とスリーブ2の増径部2aの外周部の直径よりも小さく
なっている。従って、このスプリング7は強制的にリン
グ状部材6と増径部2aの外周部に巻き付けられ、これ
らの外周部を締め付けてこれらに摩擦接触する。
The input side rotating member 1 has a ring-shaped member 6 fitted and fixed to the main body of this member. The member 6 is arranged concentrically with the output side rotating member 120 and is made of a sintered alloy or the like. It is made of a material that does not easily wear. The outer peripheral surface of the ring-shaped member 6 of the input side rotating member 1 and the output side rotating member 1
In the outer peripheral surface of the increased diameter portion 2a of the sleeve 2 at 20,
A coiled spring 7 is wound around. In this way, the spring 7 is provided on both the input side and output side rotating members 1, 1.
When it is wound over 120 and is in a free state before winding, the inner diameter is smaller than the outer diameter of the ring-shaped member 6 and the outer diameter of the increased diameter portion 2a of the sleeve 2. Therefore, the spring 7 is forcibly wound around the outer peripheral portion of the ring-shaped member 6 and the increased diameter portion 2a, and these outer peripheral portions are tightened to make frictional contact with them.

【0012】スプリング7の爪状の一端7Aは、出力側
回転部材120のスリーブ2に係止され、その他端7B
は、入力側回転部材1に対して同心状で、かつ相対回転
可能に支持されたスプリング規制部材8に係止されてい
る。このスプリング規制部材8は、出力側回転部材12
0に対して同心状に位置し、出力側回転部材120とス
プリング規制部材8の回転中心は、入力側回転部材1の
軸心と合致している。このように、スプリング規制部材
8は、入力側回転部材1に対して相対回転可能となって
いて、かつスプリング7の他端7Bを係止する部材であ
る。
The claw-shaped one end 7A of the spring 7 is locked to the sleeve 2 of the output side rotation member 120, and the other end 7B.
Are locked to a spring restricting member 8 which is concentric with the input side rotating member 1 and is supported so as to be rotatable relative to each other. The spring regulating member 8 is the output side rotating member 12
Positioned concentrically with respect to 0, the rotation centers of the output side rotation member 120 and the spring restriction member 8 coincide with the axis of the input side rotation member 1. In this way, the spring regulating member 8 is a member that is rotatable relative to the input side rotating member 1 and that locks the other end 7B of the spring 7.

【0013】スプリングクラッチが組付けられる機械装
置の機枠にはブラケット10が不動に固定され、このブ
ラケット10には電磁石11が固設されている。このブ
ラケット10の貫通孔には出力側回転部材120が回転
自在に嵌合している。又、ブラケット10の下部から側
方に折り曲げた延伸部10aには、揺動ストッパ部材1
2が、その延伸部10aを支点にして矢印b方向に揺動
自在に枢着されている。本例では、図4に示すように、
延伸部10aの先端に二叉状に突出形成された舌部10
b,10bが、揺動ストッパ部材12の下部に形成され
た切欠12b,12bにそれぞれ嵌合し、揺動ストッパ
部材12は、この切欠12b,12bの領域を中心とし
て矢印b方向に揺動可能となっている。
A bracket 10 is immovably fixed to a machine frame of a mechanical device to which a spring clutch is assembled, and an electromagnet 11 is fixedly mounted on the bracket 10. An output side rotation member 120 is rotatably fitted in the through hole of the bracket 10. In addition, the swing stopper member 1 is attached to the extending portion 10a that is bent laterally from the lower portion of the bracket 10.
2 is pivotally attached to the extending portion 10a so as to be swingable in the arrow b direction. In this example, as shown in FIG.
Tongue portion 10 formed in a bifurcated shape at the tip of the extending portion 10a
b and 10b are fitted in notches 12b and 12b formed in the lower part of the swing stopper member 12, respectively, and the swing stopper member 12 can swing in the direction of arrow b around the region of the notches 12b and 12b. Has become.

【0014】スプリング規制部材8には、揺動ストッパ
部材12と対向した部位に、適数の、図の例では互いに
180°の角度をずらした位置に配置された2つの突起
部8Aが一体に設けられている。ブラケット10の下端
部の爪10cと、揺動ストッパ部材12の基端部側の爪
12cとの間には、引っ張りバネ13の各端部が係止さ
れ、このバネ13の弾力によって、揺動ストッパ部材1
2は、この部材12に設けた爪部12aが突起部8Aに
係合する方向に付勢されている。なお、入力側回転部材
1のリング状部材6は、スプリング7との接触によって
入力側回転部材が早期に摩耗することを防止するために
設けられたものである。
In the spring restricting member 8, a suitable number of two projecting portions 8A, which are arranged at positions offset from each other by 180 ° in the example shown in the figure, are integrally formed at a portion facing the swing stopper member 12. It is provided. Each end of the tension spring 13 is locked between the claw 10c on the lower end of the bracket 10 and the claw 12c on the base end side of the swing stopper member 12, and the elastic force of this spring 13 swings the swing spring. Stopper member 1
2 is biased in a direction in which the claw portion 12a provided on the member 12 engages with the protruding portion 8A. The ring-shaped member 6 of the input side rotation member 1 is provided in order to prevent the input side rotation member from being worn early due to contact with the spring 7.

【0015】ここで、入力側回転部材1が矢印a方向に
回転駆動されているものとして、スプリング規制部材8
の1つの突起部8Aに、揺動ストッパ部材12の爪部1
2aが係合しているときは、入力側回転部材1が回転す
るのみで、この回転は、出力側回転部材120の方には
伝達されない。すなわち、入力側回転部材1が矢印a方
向へ回転することによって、この入力側回転部材1(本
例ではそのリング状部材6)に巻き付いたスプリング7
も、両者間の摩擦によって入力側回転部材1と共に回転
しようとするが、このスプリング7の他端7Bが固定係
止されているスプリング規制部材8は、その突起部8A
と、回転不能な揺動ストッパ部材12の爪部12aの係
合によって、回転を阻止されているので、スプリング7
は入力側回転部材1と一体に回転することはない。その
代り、各端7A,7Bを出力側回転部材120とスプリ
ング規制部材8に係止されたスプリング7は、その外径
をわずかに拡大する向きに弾性変形する。これにより、
スプリング7が入力側回転部材1と出力側回転部材12
0に対して巻き付く力が弱まり、入力側回転部材1と出
力側回転部材120のスプリング7を介しての駆動連結
が解除される。このようにして、入力側回転部材1は回
転するものの、出力側回転部材120は回転せず、入力
側回転部材1は、両回転部材1,120の嵌合部Aにお
いて出力側回転部材120の周りに回転し、且つ、スプ
リング巻き付け部Bにおいて、このスプリング7に対し
てスリップ回転する。
Here, assuming that the input side rotating member 1 is rotationally driven in the direction of arrow a, the spring regulating member 8 is provided.
One protrusion 8A of the claw portion 1 of the swing stopper member 12
When 2a is engaged, only the input side rotation member 1 rotates, and this rotation is not transmitted to the output side rotation member 120. That is, when the input side rotation member 1 rotates in the direction of the arrow a, the spring 7 wound around the input side rotation member 1 (the ring-shaped member 6 in this example).
Also tries to rotate together with the input side rotating member 1 due to the friction between the two, but the spring restricting member 8 to which the other end 7B of this spring 7 is fixed and locked has its protruding portion 8A.
The rotation of the spring 7 is prevented by the engagement of the claw portion 12a of the non-rotatable rocking stopper member 12 with the spring 7
Does not rotate integrally with the input side rotating member 1. Instead, the spring 7, whose ends 7A and 7B are locked to the output side rotating member 120 and the spring regulating member 8, is elastically deformed in a direction in which the outer diameter thereof is slightly increased. This allows
The spring 7 includes the input side rotating member 1 and the output side rotating member 12
The force of winding around 0 is weakened, and the drive connection between the input side rotation member 1 and the output side rotation member 120 via the spring 7 is released. In this way, although the input-side rotating member 1 rotates, the output-side rotating member 120 does not rotate, and the input-side rotating member 1 does not rotate with the output-side rotating member 120 at the fitting portion A between the rotating members 1 and 120. It rotates around and slips with respect to this spring 7 at the spring winding portion B.

【0016】上述した動作時には、ブラケット10に設
けられた電磁石11は励磁されない状態となっており、
これにより引っ張りバネ13の作用で揺動ストッパ部材
12が図1の姿勢を占め、その爪部12aがスプリング
規制部材8の1つの突起部8Aに係合するのであるが、
図示していない制御装置からクラッチオン信号が出力さ
れ、これに伴い、電磁石11が励磁されると、少なくと
も一部が磁性体より成っている揺動ストッパ部材12
が、電磁石11の方に図3に示す如く吸引される。
During the above-described operation, the electromagnet 11 provided on the bracket 10 is not excited,
As a result, the swing stopper member 12 occupies the posture of FIG. 1 by the action of the tension spring 13, and the claw portion 12a thereof engages with one projection portion 8A of the spring regulating member 8.
When a clutch-on signal is output from a control device (not shown) and the electromagnet 11 is excited in response to this, the swing stopper member 12 at least a part of which is made of a magnetic material.
Are attracted toward the electromagnet 11 as shown in FIG.

【0017】これに伴い、突起部8Aから爪部12aが
外れ、今までスプリング規制部材8を回転不能に拘束し
ていた揺動ストッパ部材12はその拘束を解除する。す
ると、スプリング7がその弾性で縮径し、入力側回転部
材1のリング状部材6の外周面と、出力側回転部材12
0のスリーブ2の外周面とに喰いつきつつ巻き締めら
れ、そのスプリング7を介して出力側回転部材120が
入力側回転部材1と一体となって回転するようになる。
すなわち、スプリング7が入力側回転部材1と出力側回
転部材120を締め付け、両回転部材1,120がスプ
リング7を介して駆動連結されるのである。このように
して入力側回転部材1の回転が、出力側回転部材120
に伝えられ、出力側回転部材120と、スプリング7
と、スプリング規制部材8とが、入力側回転部材1と一
体となって矢印a方向に回転する。このように、スプリ
ング規制部材8は、揺動ストッパ部材12の作動によっ
て、スプリング7の状態を規制する用をなす。
Along with this, the claw portion 12a is disengaged from the projecting portion 8A, and the swing stopper member 12, which has hitherto restrained the spring regulating member 8 unrotatably, releases the restraint. Then, the spring 7 contracts due to its elasticity, and the outer peripheral surface of the ring-shaped member 6 of the input side rotating member 1 and the output side rotating member 12 are rotated.
The outer peripheral surface of the sleeve 2 of 0 is wound and fastened, and the output side rotating member 120 rotates integrally with the input side rotating member 1 via the spring 7.
That is, the spring 7 tightens the input side rotating member 1 and the output side rotating member 120, and both rotating members 1 and 120 are drive-connected via the spring 7. In this way, the rotation of the input side rotating member 1 is changed to the output side rotating member 120.
Is transmitted to the output side rotating member 120 and the spring 7
And the spring restricting member 8 rotate together with the input side rotating member 1 in the direction of arrow a. In this way, the spring regulating member 8 serves to regulate the state of the spring 7 by the operation of the swing stopper member 12.

【0018】このようにして、駆動側である入力側回転
部材1と、従動側である出力側回転部材120との間の
回転伝達関係が連繋され、入力側回転部材1の回転が出
力側回転部材120の方に伝達され、例えば、この回転
部材120上に固装された負荷回転系14が回転駆動さ
れる。
In this way, the rotation transmitting relationship between the input side rotating member 1 which is the driving side and the output side rotating member 120 which is the driven side is linked, and the rotation of the input side rotating member 1 is rotated on the output side. It is transmitted to the member 120, and for example, the load rotation system 14 fixedly mounted on the rotation member 120 is rotationally driven.

【0019】電磁石11や揺動ストッパ部材12等は、
入力側回転部材から出力側回転部材への回転伝達を断切
するとき、入力側回転部材と出力側回転部材が前記スプ
リングを介して駆動連結されないように、スプリング規
制部材を回転不能に拘束すると共に、入力側回転部材の
回転を出力側回転部材に伝達するとき、スプリングが入
力側回転部材と出力側回転部材を締付けて両回転部材が
スプリングを介して駆動連結されるように、上記拘束を
解除する手段の一例を構成するものである。
The electromagnet 11, the swing stopper member 12 and the like are
When disconnecting the rotation transmission from the input side rotation member to the output side rotation member, the spring regulation member is non-rotatably restrained so that the input side rotation member and the output side rotation member are not drive-coupled via the spring, When transmitting the rotation of the input-side rotating member to the output-side rotating member, the above-mentioned constraint is released so that the spring clamps the input-side rotating member and the output-side rotating member so that both rotating members are drive-coupled via the spring. It constitutes an example of the means.

【0020】なお、電磁石11の励磁が解除されると、
引っ張りバネ13の力によって、図3に示した揺動スト
ッパ部材12は電磁石11から離隔する方向に回動し、
爪部12aが再び図1に示すようにいずれかの突起部8
Aに係合する。これによって、前述のように、入力側回
転部材1と出力側回転部材120の回転伝達関係は断切
される。
When the excitation of the electromagnet 11 is released,
By the force of the tension spring 13, the swing stopper member 12 shown in FIG. 3 rotates in a direction away from the electromagnet 11,
As shown in FIG. 1, the claw portion 12a is again provided with one of the protrusions 8a.
Engage A. As a result, as described above, the rotation transmission relationship between the input side rotation member 1 and the output side rotation member 120 is cut off.

【0021】ここで、スプリング規制部材8が拘束され
ていて、入力側回転部材1からの回転駆動力が出力側回
転部材120の側に伝達されないとき、回転している入
力側回転部材1に対して、出力側回転部材120が、両
回転部材の嵌合部Aにおける摩擦力によって連れ回りし
てしまうと、負荷回転系14などの停止位置(ホームポ
ジション)が決まっているような場合、その負荷回転系
の停止位置が狂うことになる。
Here, when the spring restricting member 8 is constrained and the rotational driving force from the input side rotating member 1 is not transmitted to the output side rotating member 120 side, the rotating input side rotating member 1 is If the output side rotation member 120 is rotated together by the frictional force in the fitting portion A of both rotation members, if the stop position (home position) of the load rotation system 14 or the like is determined, the load The stop position of the rotating system will go wrong.

【0022】本例のスプリングクラッチは、かような連
れ回りを防止できるものとなっている。
The spring clutch of this embodiment can prevent such accompanying rotation.

【0023】図1及び図2において、出力側回転部材1
20におけるスリーブ2の端部側の中空軸部2bの外径
をdとするものとして、その軸部2bは、図2に示すよ
うに「D型」をなしている。ここで、図1において符号
15で示すものは摩擦部材であり、この部材15は、複
数の摩擦パッド16と、これらを円周方向に一体に配し
た円板17により構成され、この円板17の中心部のD
型穴17A(図2)に、先のD型中空軸部2bが嵌め込
まれている。これによって、出力側回転部材120が回
転すると、摩擦部材15が出力側回転部材120と一体
に回転する。そして、摩擦部材15は出力軸3の軸方向
にも動き得るようになっている。このように摩擦部材1
5は、出力側回転部材120に対して相対回転不能であ
って、その軸方向に移動可能に支持されている。
1 and 2, the output side rotating member 1
Assuming that the outer diameter of the hollow shaft portion 2b on the end portion side of the sleeve 2 in 20 is d, the shaft portion 2b is "D-shaped" as shown in FIG. Here, the reference numeral 15 in FIG. 1 is a friction member, and this member 15 is composed of a plurality of friction pads 16 and a disc 17 integrally arranged in the circumferential direction. In the center of
The aforementioned D-shaped hollow shaft portion 2b is fitted in the mold hole 17A (FIG. 2). As a result, when the output side rotation member 120 rotates, the friction member 15 rotates together with the output side rotation member 120. The friction member 15 can also move in the axial direction of the output shaft 3. In this way, the friction member 1
5 is non-rotatable relative to the output side rotating member 120, and is supported so as to be movable in the axial direction.

【0024】中空軸部2bのまわりには、弾性部材の一
例である圧縮バネ18が取り付けられ、このバネ18
は、中空軸部2bの雄ネジ部2b1に螺合されたナット
19に当接しているワッシャ20と、円板17との間で
強制的に縮められている。そして、バネ18の伸張弾力
によって、摩擦部材15の摩擦パッド16がブラケット
10に圧接している。
A compression spring 18, which is an example of an elastic member, is attached around the hollow shaft portion 2b.
Is forcibly contracted between the disk 17 and the washer 20 that is in contact with the nut 19 screwed into the male screw portion 2b 1 of the hollow shaft portion 2b. Then, the extension pad of the spring 18 causes the friction pad 16 of the friction member 15 to be pressed against the bracket 10.

【0025】スプリング規制部材8が拘束され、入力側
回転部材1と出力側回転部材120との間の回転伝達が
断切されているとき、両回転部材1,120の嵌合部A
に生じる摩擦力によって、出力側回転部材120が連れ
回しようとするも、機枠に不動に固定されているブラケ
ット10に圧接した摩擦パッド16には摩擦力が作用す
るので、出力側回転部材120には所定の制動力が付与
され、そのような連れ回りを生じることがない。
When the spring regulating member 8 is constrained and the rotation transmission between the input side rotating member 1 and the output side rotating member 120 is cut off, the fitting portion A of both rotating members 1, 120 is formed.
Even if the output side rotating member 120 tries to rotate with the output side rotating member 120, the friction force acts on the friction pad 16 pressed against the bracket 10 that is fixedly fixed to the machine frame. A predetermined braking force is applied to the motor, and such entrainment does not occur.

【0026】なお、ブラケット10に対する摩擦パッド
16の圧接力としては、同パッド16とブラケット10
との間で発生する摩擦力が、嵌合部Aにおける摩擦力に
よって出力側回転部材120が連れ回りすることを阻止
できるような圧接力に設定されていればよい。この圧接
力は圧縮バネ18の伸張弾力の大きさによって主に決ま
り、出力側回転部材120の雄ネジ部2b1に螺合した
ナット19を回転させることにより、圧縮バネ18の弾
力を調整することができる。
The pressure contact force of the friction pad 16 with respect to the bracket 10 is the pad 16 and the bracket 10.
It suffices that the frictional force generated between and is set to a pressure contact force that can prevent the output side rotation member 120 from rotating together due to the frictional force in the fitting portion A. This pressure contact force is mainly determined by the amount of extension elasticity of the compression spring 18, and the elasticity of the compression spring 18 can be adjusted by rotating the nut 19 screwed into the male screw portion 2b 1 of the output side rotation member 120. You can

【0027】上述のように、図示したスプリングクラッ
チは、入力側回転部材1から出力側回転部材120への
回転伝達の断切時に、回転している入力側回転部材1に
対して、両回転部材1,120の嵌合部Aにおける摩擦
力により、出力側回転部材120が連れ回わりするのを
防止する出力側回転部材制動手段を具備しており、本例
では、この出力側回転部材制動手段が、出力側回転部材
120に対して相対回転不能に支持され、かつブラケッ
ト10より成る固定部材に摩擦接触する摩擦部材15を
有しているのである。スプリング規制部材8の拘束が解
除されて出力側回転部材120が回転すれば、摩擦部材
15もこの回転部材120と一体に回転する。
As described above, in the illustrated spring clutch, when the rotation transmission from the input side rotating member 1 to the output side rotating member 120 is cut off, both rotating member 1 are rotated with respect to the rotating input side rotating member 1. , 120 is provided with an output side rotating member braking means for preventing the output side rotating member 120 from rotating around due to a frictional force in the fitting portion A. In this example, the output side rotating member braking means is provided. The friction member 15 is supported so as not to be rotatable relative to the output side rotation member 120 and is in frictional contact with the fixed member composed of the bracket 10. When the restraint of the spring restricting member 8 is released and the output side rotating member 120 rotates, the friction member 15 also rotates integrally with the rotating member 120.

【0028】又、本例では、摩擦部材15が圧接する固
定部材としてブラケット10を用いたが、これ以外の固
定部材、例えば、機枠に不動に固定された他の部材を用
いてもよい。さらに、摩擦部材15の側に摩擦パッド1
6を固定する代りに、かかる摩擦パッドを固定部材の側
に固定し、これに摩擦部材を圧接させるようにしてもよ
い。
Further, in this example, the bracket 10 is used as the fixing member with which the friction member 15 is brought into pressure contact, but a fixing member other than this, for example, another member fixedly fixed to the machine frame may be used. Further, the friction pad 1 is provided on the friction member 15 side.
Instead of fixing 6 the friction pad may be fixed to the side of the fixing member and the friction member may be pressed against it.

【0029】さらに本例では、固定部材に摩擦接触する
摩擦部材15が、出力側回転部材120に対して、相対
回転不能であると共に、その軸方向に移動可能に支持さ
れており、出力側回転部材制動手段が、かかる摩擦部材
15と、この摩擦部材15を固定部材に対して加圧する
弾性部材と、この弾性部材による加圧力を調整する調整
装置とを有し、図の例では、かかる弾性部材9が圧縮バ
ネ18により構成され、調整装置が、出力側回転部材1
20に形成された雄ネジ部2b1と、これに螺合したナ
ット19と、同じく出力側回転部材120に嵌合したワ
ッシャ20とから構成されている。ワッシャ20を省略
し、バネ18を直にナット19に圧接させてもよい。
Further, in this embodiment, the friction member 15 which is in frictional contact with the fixed member is not rotatable relative to the output side rotating member 120 and is supported so as to be movable in the axial direction thereof, and the output side rotating member is rotated. The member braking means includes such a friction member 15, an elastic member that presses the friction member 15 against the fixed member, and an adjusting device that adjusts the pressure applied by the elastic member. The member 9 is constituted by the compression spring 18, and the adjusting device is configured so that the output side rotating member 1
It is composed of a male screw portion 2b 1 formed on the shaft 20, a nut 19 screwed to the male screw portion 2b 1, and a washer 20 fitted to the output side rotation member 120. The washer 20 may be omitted and the spring 18 may be directly pressed against the nut 19.

【0030】摩擦部材15は、出力側回転部材120に
対して制動力を付与するものであるから、この制動力が
大きくなると、出力側回転部材120に作用する負荷が
徒らに大きくなり、これを回転させるトルクが増大して
好ましくない。従って、出力側回転部材120がつれ回
わりを起こさないことを条件に、この出力側回転部材1
20に与える制動力を最小限に抑えることが望ましい。
Since the friction member 15 gives a braking force to the output side rotating member 120, if the braking force becomes large, the load acting on the output side rotating member 120 will be unnecessarily increased, and It is not preferable because the torque for rotating the motor increases. Therefore, on the condition that the output side rotation member 120 does not rotate, the output side rotation member 1
It is desirable to minimize the braking force on 20.

【0031】負荷回転系14の重量などによって、出力
側回転部材120の連れ回りのし易さの程度は変化する
が、本例の構成によれば、その連れ回りのし易さの程度
に応じて、ナット19を回転し、摩擦部材15がブラケ
ット10に対して圧接する力を調整し、出力側回転部材
120に与える制動力を必要最小限のものに設定するこ
とができる。例えば、ナット19を図1における左方へ
ネジ送りして、バネ18の弾力を強くすることで、両要
素10,16の間の摩擦力を大きくすることができ、こ
れにより出力側回転部材2の連れ回りを起こしにくくす
ることができる。又、ナット19を逆方向に回わして、
これを図1の右方にネジ送りすることにより、バネ18
の弾力を弱め、両要素10,16の間の摩擦力を小さく
することができる。
Although the degree of easiness of rotation of the output side rotation member 120 changes depending on the weight of the load rotation system 14, according to the configuration of the present embodiment, the degree of easiness of rotation of the output side rotation member 120 depends on the degree of ease of rotation. Then, the nut 19 is rotated to adjust the force with which the friction member 15 presses against the bracket 10, and the braking force applied to the output side rotation member 120 can be set to the necessary minimum. For example, by screwing the nut 19 to the left in FIG. 1 to increase the elastic force of the spring 18, the frictional force between the elements 10 and 16 can be increased, and thus the output side rotating member 2 It is possible to make it harder for the person to go around. Also, turn the nut 19 in the opposite direction,
By screwing this to the right in FIG. 1, the spring 18
It is possible to weaken the elastic force of and reduce the frictional force between the elements 10 and 16.

【0032】このように摩擦部材15は、出力側回転部
材120に対する制動力の大きさが調節可能となるよう
に構成され、出力側回転部材120の連れ回りし易さの
程度に応じて、出力側回転部材120に対する制動力を
変えることができるのである。
As described above, the friction member 15 is constructed so that the magnitude of the braking force applied to the output side rotation member 120 can be adjusted, and the friction member 15 can output the output power according to the degree of ease of rotation of the output side rotation member 120. The braking force on the side rotation member 120 can be changed.

【0033】本発明は、画像形成装置以外の各種の機械
装置のスプリングクラッチに広く適用できるものであ
る。
The present invention can be widely applied to the spring clutch of various mechanical devices other than the image forming apparatus.

【0034】[0034]

【発明の効果】請求項1に記載のスプリングクラッチに
よれば、入力側回転部材と出力側回転部材との間の回転
伝達の断切時における、出力側回転部材の連れ回りを防
止することができる。
With the spring clutch according to the first aspect of the present invention, it is possible to prevent the output side rotating member from rotating together when the rotation transmission between the input side rotating member and the output side rotating member is cut off. .

【0035】請求項2に記載のスプリングクラッチによ
れば、低コストで、かつ簡単に出力側回転部材制動手段
を構成することができる。
According to the spring clutch of the second aspect, the output side rotating member braking means can be easily constructed at low cost.

【0036】請求項3に記載のスプリングクラッチによ
れば、その出力側回転部材に対する制動力の大きさを自
在に調整することができ、その大きさを最適なものに設
定することが可能である。
According to the third aspect of the present invention, the magnitude of the braking force applied to the output side rotating member can be adjusted freely, and the magnitude can be set to an optimum value. .

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

【図1】本発明一実施例のスプリングクラッチの断面図
である。
FIG. 1 is a sectional view of a spring clutch according to an embodiment of the present invention.

【図2】同上スプリングクラッチの側面図である。FIG. 2 is a side view of the above spring clutch.

【図3】同上スプリングクラッチのスプリング規制部材
と揺動ストッパ部材の係合が解除された状態を示す断面
図である。
FIG. 3 is a cross-sectional view showing a state in which the spring restricting member and the swing stopper member of the spring clutch are disengaged.

【図4】スプリング規制部材をブラケットから離し、両
者の組付状態を明らかにした斜視図である。
FIG. 4 is a perspective view showing a state where the spring restricting member is separated from the bracket and the both are assembled.

【符号の説明】[Explanation of symbols]

1 入力側回転部材 7 スプリング 7A 一端 7B 他端 8 スプリング規制部材 15 摩擦部材 120 出力側回転部材 A 嵌合部 DESCRIPTION OF SYMBOLS 1 Input side rotation member 7 Spring 7A One end 7B The other end 8 Spring regulation member 15 Friction member 120 Output side rotation member A Fitting part

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 回転駆動される入力側回転部材と、該入
力側回転部材に対して相対回転可能に嵌合した出力側回
転部材と、両回転部材に跨って巻き付けられ、一端が出
力側回転部材に係止されたコイル状のスプリングと、前
記入力側回転部材に対して相対回転可能となっていて、
かつ前記スプリングの他端を係止するスプリング規制部
材と、入力側回転部材から出力側回転部材への回転伝達
を断切するとき、入力側回転部材と出力側回転部材が前
記スプリングを介して駆動連結されないように、前記ス
プリング規制部材を回転不能に拘束すると共に、入力側
回転部材の回転を出力側回転部材に伝達するとき、前記
スプリングが入力側回転部材と出力側回転部材を締付け
て両回転部材がスプリングを介して駆動連結されるよう
に、前記拘束を解除する手段と、前記回転伝達の断切時
に、回転している入力側回転部材に対して、両回転部材
の嵌合部における摩擦力により、出力側回転部材が連れ
回りするのを防止する出力側回転部材制動手段とを具備
したことを特徴とするスプリングクラッチ。
1. An input-side rotating member that is rotationally driven, an output-side rotating member that is relatively rotatably fitted to the input-side rotating member, and is wound around both rotating members, and one end of the output-side rotating member is rotated. A coiled spring locked to the member, and rotatable relative to the input side rotating member,
Further, when disconnecting the rotation transmission from the input side rotation member to the output side rotation member and the spring restriction member that locks the other end of the spring, the input side rotation member and the output side rotation member are drive-coupled via the spring. When the rotation of the input side rotation member is transmitted to the output side rotation member, the spring tightens the input side rotation member and the output side rotation member to prevent both the rotation regulation member from rotating. So as to be drive-coupled via a spring, and by the frictional force in the fitting portion of both rotating members with respect to the rotating input side rotating member at the time of disconnection of the rotation transmission, the means for releasing the restraint. A spring clutch comprising: an output side rotation member braking means for preventing the output side rotation member from rotating together.
【請求項2】 出力側回転部材制動手段は、出力側回転
部材に対して相対回転不能に支持され、かつ固定部材に
摩擦接触する摩擦部材を有している請求項1に記載にス
プリングクラッチ。
2. The spring clutch according to claim 1, wherein the output side rotation member braking means includes a friction member which is supported so as not to be rotatable relative to the output side rotation member and which is in frictional contact with the fixed member.
【請求項3】 出力側回転部材制動手段は、出力側回転
部材に対して相対回転不能であって、その軸方向に移動
可能に支持され、かつ固定部材に摩擦接触する摩擦部材
と、該摩擦部材を前記固定部材に対して加圧する弾性部
材と、該弾性部材による加圧力を調整する調整装置とを
有している請求項1に記載のスプリングクラッチ。
3. A friction member, which is not rotatable relative to the output rotation member, is movably supported in the axial direction of the output rotation member braking member, and is in frictional contact with a fixed member, and the friction member. The spring clutch according to claim 1, further comprising an elastic member that presses a member against the fixing member, and an adjusting device that adjusts a pressure applied by the elastic member.
JP6097914A 1994-04-13 1994-04-13 Spring clutch Pending JPH07279989A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6097914A JPH07279989A (en) 1994-04-13 1994-04-13 Spring clutch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6097914A JPH07279989A (en) 1994-04-13 1994-04-13 Spring clutch

Publications (1)

Publication Number Publication Date
JPH07279989A true JPH07279989A (en) 1995-10-27

Family

ID=14204983

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6097914A Pending JPH07279989A (en) 1994-04-13 1994-04-13 Spring clutch

Country Status (1)

Country Link
JP (1) JPH07279989A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2003042042A1 (en) * 2001-11-14 2005-03-03 株式会社湯山製作所 Drug feeder
JP2021175917A (en) * 2020-03-25 2021-11-04 エスアールアイ インターナショナルSRI International Failsafe brake device for robotic and other application

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2003042042A1 (en) * 2001-11-14 2005-03-03 株式会社湯山製作所 Drug feeder
JP4621428B2 (en) * 2001-11-14 2011-01-26 株式会社湯山製作所 Drug feeder
JP2021175917A (en) * 2020-03-25 2021-11-04 エスアールアイ インターナショナルSRI International Failsafe brake device for robotic and other application
US11732768B2 (en) 2020-03-25 2023-08-22 Sri International Failsafe brake device for robotic and other applications

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