JP2021021461A - clutch - Google Patents
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- JP2021021461A JP2021021461A JP2019139571A JP2019139571A JP2021021461A JP 2021021461 A JP2021021461 A JP 2021021461A JP 2019139571 A JP2019139571 A JP 2019139571A JP 2019139571 A JP2019139571 A JP 2019139571A JP 2021021461 A JP2021021461 A JP 2021021461A
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Abstract
Description
本発明は、駆動源からの駆動回転力を入力部から出力部へ断続的に伝達するためのクラッチに関する。 The present invention relates to a clutch for intermittently transmitting a driving rotational force from a driving source from an input unit to an output unit.
上記クラッチとしては、引用文献１の摩擦式のクラッチや引用文献２のバネの付勢力を用いた電磁バネクラッチが知られている。 As the above-mentioned clutch, a friction type clutch of Cited Document 1 and an electromagnetic spring clutch using the urging force of a spring of Cited Document 2 are known.
引用文献１では、コイルに電力を供給することによって、アーマチュアがリング体の弾性力に抗してロータに吸着されてアーマチュアがロータに当接する。これにより、ロータがアーマチュアと共回りしてクラッチが入の状態になる。この構成では、ロータとアーマチュアとが適切に当接するように両者に形成された当接面の研磨加工、研磨後の洗浄工程、当接面の平滑性を高めるためのトルクアップ工程等の加工工程が多く必要であり、コスト面において不利になるという不都合がある。また、ロータ及びアーマチュアを鋼板で構成しているため、錆びが発生するという問題があり、早期改善が望まれている。 In Cited Document 1, by supplying electric power to the coil, the armature is attracted to the rotor against the elastic force of the ring body, and the armature comes into contact with the rotor. As a result, the rotor rotates together with the armature and the clutch is engaged. In this configuration, processing steps such as polishing of the contact surface formed on the rotor and the armature so that they are in proper contact, a cleaning process after polishing, and a torque-up process for improving the smoothness of the contact surface. There is a disadvantage that it is disadvantageous in terms of cost. Further, since the rotor and the armature are made of steel plate, there is a problem that rust occurs, and early improvement is desired.
引用文献２も、引用文献１と同様に、コイルに電力を供給すると、バネの付勢力に抗してアーマチュアがロータの方向に移動することによって、アーマチュアがロータに当接する。これにより、ロータがアーマチュアと共回りしてクラッチが入の状態になる。この構成は、引用文献１と同様であるため、引用文献１と同様の不都合が発生する。 In Cited Document 2, similarly to Cited Document 1, when electric power is supplied to the coil, the armature moves in the direction of the rotor against the urging force of the spring, so that the armature comes into contact with the rotor. As a result, the rotor rotates together with the armature and the clutch is engaged. Since this configuration is the same as that of Cited Document 1, the same inconvenience as that of Cited Document 1 occurs.
上記２つの構成とは別の構成のクラッチが提案されている。このクラッチは、ソレノイドとソレノイドとは別の場所に取り付けたクラッチ部とを連動させたクラッチ機構から構成されている（引用文献３参照）。この場合、別の場所に２部品を取り付けるため、取り付けスペースが大きくなることや、取り付け工程数が多くなるだけでなく、ソレノイドとクラッチ部の取り付け時に隙間調整等の調整箇所が必要になり、コスト面において不利になるという不都合があり、改善の余地があった。 A clutch having a configuration different from the above two configurations has been proposed. This clutch is composed of a clutch mechanism in which a solenoid and a clutch portion attached to a place different from the solenoid are interlocked (see Reference 3). In this case, since the two parts are mounted in different places, not only the mounting space becomes large and the number of mounting steps increases, but also adjustment points such as clearance adjustment are required when mounting the solenoid and the clutch part, which is costly. There was room for improvement due to the inconvenience of being disadvantageous in terms of aspects.
そこで本発明は、錆びの発生がなく、しかもコスト面及び取り付けスペースにおいて有利となるクラッチを提供することを課題とする。 Therefore, it is an object of the present invention to provide a clutch that does not generate rust and is advantageous in terms of cost and mounting space.
本発明のクラッチは、駆動源からの駆動回転力が入力される回転可能な入力部と、前記入力部と同軸上に回転する回転可能な出力部と、前記入力部及び前記出力部と同軸上を軸方向に移動するプランジャーと、前記プランジャーと同軸上に配置され該プランジャーを作動させるコイルと、を備え、前記プランジャーは、係合部を備え、前記入力部は、前記プランジャーの係合部が係合して該入力部の回転を阻止する被係合部を備え、前記プランジャーの非作動時に前記係合部が前記被係合部に係合するように該プランジャーを移動付勢するための付勢手段を備え、前記プランジャーを作動させることにより前記係合を解除することで前記駆動源からの駆動回転力が前記入力部から前記出力部へ伝達されるように構成されていることを特徴としている。 The clutch of the present invention has a rotatable input unit to which a driving rotational force from a drive source is input, a rotatable output unit that rotates coaxially with the input unit, and coaxially with the input unit and the output unit. A plunger that moves in the axial direction and a coil that is arranged coaxially with the plunger and operates the plunger. The plunger is provided with an engaging portion, and the input portion is the plunger. The plunger is provided with an engaged portion that engages and prevents the rotation of the input portion, so that the engaged portion engages with the engaged portion when the plunger is not activated. Is provided with an urging means for moving and urging, and the driving rotational force from the drive source is transmitted from the input unit to the output unit by disengaging the engagement by operating the plunger. It is characterized by being configured in.
本発明によれば、コイルに通電しない時には、プランジャーが非作動状態となり、付勢手段によりプランジャーの係合部が入力部の被係合部に係合する。この係合により入力部の回転が阻止され、駆動源からの駆動回転力が入力部から出力部へ伝達されない。コイルに通電した時には、プランジャーが作動状態となり、付勢手段による付勢力に抗してプランジャーが被係合部から離れる側へ移動して前記係合が解除される。この係合解除により駆動源からの駆動回転力が入力部から出力部へ伝達される。また、出力部が入力部と同軸上に設けられ、プランジャーが入力部及び出力部と同軸上を軸方向に移動するように設けられ、コイルがプランジャーと同軸上に配置されているので、取り付けスペースを小さく抑えることができる。また、構成部品を同軸上に組み付けるので、構成部品同士の隙間調整等の調整箇所も不要になる。また、動力伝達を係合及び係合解除で行うので、当接面が不要となる。このため、当接面の研磨加工、研磨後の洗浄工程、トルクアップ工程等の加工工程が全く不要になるだけでなく、当接面に錆が発生することもない。 According to the present invention, when the coil is not energized, the plunger is in an inactive state, and the engaging portion of the plunger is engaged with the engaged portion of the input portion by the urging means. This engagement prevents the rotation of the input unit, and the driving rotational force from the drive source is not transmitted from the input unit to the output unit. When the coil is energized, the plunger is activated, the plunger moves away from the engaged portion against the urging force of the urging means, and the engagement is released. By this disengagement, the driving rotational force from the driving source is transmitted from the input unit to the output unit. Further, since the output unit is provided coaxially with the input unit, the plunger is provided so as to move coaxially with the input unit and the output unit in the axial direction, and the coil is arranged coaxially with the plunger. The mounting space can be kept small. Further, since the components are assembled coaxially, adjustment points such as gap adjustment between the components are not required. Further, since the power transmission is performed by engaging and disengaging, the contact surface becomes unnecessary. Therefore, not only the processing steps such as the polishing process of the contact surface, the cleaning process after polishing, and the torque increasing process are completely unnecessary, but also the contact surface is not rusted.
また、本発明のクラッチは、前記駆動源が駆動ギアからなり、前記入力部は、同軸上に回転可能で、かつ、前記駆動ギアと噛み合って回転状態となる有歯部及び該有歯部から離脱して該駆動ギアと噛み合わず停止状態となる欠歯部を有する２枚の欠歯ギアを備え、一方の第１欠歯ギアが、前記出力部に連結されるギアであり、他方の第２欠歯ギアが、前記プランジャーの係合部が係合する前記被係合部を備え、前記プランジャーの作動時に前記第２欠歯ギアを所定量回転させて前記駆動ギアに該第２欠歯ギアの有歯部を噛合わせるためのバネを備え、前記第２欠歯ギアを所定量回転させることにより前記第１欠歯ギアに備える被係合部に係合して該第１欠歯ギアを回転させるギア係合部を該第２欠歯ギアに備えていてもよい。 Further, in the clutch of the present invention, the drive source is a drive gear, and the input portion is coaxially rotatable and meshes with the drive gear to be in a rotating state from a toothed portion and the toothed portion. It is provided with two missing tooth gears having a missing tooth portion that disengages and does not mesh with the drive gear and is in a stopped state, and one first missing tooth gear is a gear connected to the output portion and the other second gear. The two missing tooth gear includes the engaged portion with which the engaging portion of the plunger is engaged, and when the plunger is operated, the second missing tooth gear is rotated by a predetermined amount to the drive gear. A spring for engaging the toothed portion of the missing tooth gear is provided, and by rotating the second missing tooth gear by a predetermined amount, the first missing tooth gear is engaged with the engaged portion provided in the first missing tooth gear. The second missing tooth gear may be provided with a gear engaging portion for rotating the tooth gear.
上記構成によれば、第２欠歯ギアの被係合部とプランジャーの係合部とが係合している状態では、第２欠歯ギアの回転が阻止される。これにより２枚の欠歯ギアの欠歯部に駆動ギアが一致した状態が保たれるため、駆動源からの駆動回転力が第２欠歯ギアを介して第１欠歯ギアに伝達されないため、出力部へ伝達されない。プランジャーの作動時には、第２欠歯ギアの被係合部からプランジャーの係合部が係合解除されることによって、バネが第２欠歯ギアを回転させて、第２欠歯ギアの有歯部を駆動ギアに噛合わせることができる。この噛み合いにより第２欠歯ギアが所定量回転すると、第１欠歯ギアに備える被係合部に第２欠歯ギアに備えるギア係合部が係合する。この係合により第２欠歯ギアの回転に伴って第１欠歯ギアが回転して第１欠歯ギアの有歯部を駆動ギアに噛合わせて、第１欠歯ギアの回転が出力部に伝達される。 According to the above configuration, the rotation of the second missing tooth gear is prevented when the engaged portion of the second missing tooth gear and the engaging portion of the plunger are engaged. As a result, the drive gear is maintained in a state in which the drive gears are aligned with the missing teeth of the two missing tooth gears, so that the driving rotational force from the drive source is not transmitted to the first missing tooth gear via the second missing tooth gear. , Not transmitted to the output section. When the plunger is activated, the engagement portion of the plunger is disengaged from the engaged portion of the second missing tooth gear, so that the spring rotates the second missing tooth gear and the second missing tooth gear. The toothed portion can be engaged with the drive gear. When the second missing tooth gear rotates by a predetermined amount due to this meshing, the gear engaging portion provided in the second missing tooth gear engages with the engaged portion provided in the first missing tooth gear. Due to this engagement, the first missing tooth gear rotates with the rotation of the second missing tooth gear, the toothed portion of the first missing tooth gear meshes with the drive gear, and the rotation of the first missing tooth gear is the output portion. Is transmitted to.
本発明によれば、構成部品を同軸上に配置し、動力伝達を係合により行う構成とすることによって、錆びの発生がなく、しかもコスト面及び取り付けスペースにおいて有利となるクラッチを提供することができる。 According to the present invention, by arranging the components coaxially and performing power transmission by engagement, it is possible to provide a clutch that does not generate rust and is advantageous in terms of cost and mounting space. it can.
本発明につき、一実施形態を取り上げて、図面とともに以下説明を行う。 The present invention will be described below with reference to one embodiment.
＜第１実施形態＞
本発明の第１実施形態のクラッチ１は、図１〜図４に示すように、駆動源である駆動ギア２からの駆動回転力が入力される回転可能な入力部３と、入力部３と同軸上に回転する回転可能な出力部４と、入力部３及び出力部４と同軸上を軸方向に移動するプランジャー５と、プランジャー５と同軸上に配置されプランジャー５を作動させるコイル６と、プランジャー５の非作動時に後述する係合部５３Ｂが後述する被係合部３２ｃ（図６（ａ）参照）に係合するようにプランジャー５を移動付勢するための付勢手段７と、を備え、プランジャー５を作動させることにより前記係合を解除することで駆動ギア２からの駆動回転力が入力部３から出力部４へ伝達されるように構成されている。このクラッチ１は、例えば、複写機の給紙機構等に適用される。
<First Embodiment>
As shown in FIGS. 1 to 4, the clutch 1 of the first embodiment of the present invention includes a rotatable input unit 3 to which a driving rotational force from a driving gear 2 which is a driving source is input, and an input unit 3 A rotatable output unit 4 that rotates coaxially, a plunger 5 that moves axially on the input unit 3 and the output unit 4, and a coil that is arranged coaxially with the plunger 5 and operates the plunger 5. 6 and the urging for moving and urging the plunger 5 so that the engaging portion 53B described later engages with the engaged portion 32c (see FIG. 6A) described later when the plunger 5 is not activated. The means 7 is provided, and the drive rotational force from the drive gear 2 is transmitted from the input unit 3 to the output unit 4 by disengaging the engagement by operating the plunger 5. This clutch 1 is applied to, for example, a paper feeding mechanism of a copying machine.
入力部３は、図１及び図４に示すように、同軸上に回転可能で、かつ、駆動ギア２と噛み合って回転状態となる有歯部，３２Ａ（歯部が連続形成されている部分）及び有歯部３１Ａ，３２Ａから離脱して駆動ギア２と噛み合わず停止状態となる欠歯部３１Ｂ，３２Ｂ（歯部が形成されていない部分）を有する２枚の欠歯ギア３１，３２から構成されている。そして、２枚の欠歯ギア３１，３２は、同一の外径寸法を有している。また、２枚の欠歯ギア３１，３２の欠歯部３１Ｂ，３２Ｂに駆動ギア２が一致した状態（入り込んだ状態）において、駆動ギア２からの駆動回転力が伝達されないように構成されている（図１参照）。また、２枚の欠歯ギア３１，３２の有歯部３１Ａ，３２Ａが形成されている範囲及び欠歯部３１Ｂ，３２Ｂが形成されている範囲は、いずれも同一範囲に構成されている。 As shown in FIGS. 1 and 4, the input portion 3 is a toothed portion, 32A (a portion in which the tooth portions are continuously formed) that can rotate coaxially and mesh with the drive gear 2 to be in a rotating state. It is composed of two tooth-missing gears 31 and 32 having tooth-missing parts 31B and 32B (parts where the toothed portion is not formed) which are separated from the toothed parts 31A and 32A and do not mesh with the drive gear 2 and are in a stopped state. Has been done. The two missing tooth gears 31 and 32 have the same outer diameter. Further, the drive rotational force from the drive gear 2 is not transmitted in a state where the drive gear 2 coincides with the tooth missing portions 31B and 32B of the two tooth missing gears 31 and 32 (in a state of being inserted). (See FIG. 1). Further, the range in which the toothed portions 31A and 32A of the two missing tooth gears 31 and 32 are formed and the range in which the toothed portions 31B and 32B are formed are both configured to be the same range.
出力部４は、角筒状の部材からなり、出力部４の一端部が欠歯ギア３１，３２のうちの一方の第１欠歯ギア３１に一体回転可能に連結されており、第１欠歯ギア３１が回転することにより、第１欠歯ギア３１の有歯部３１Ａが駆動ギア２に噛み合うことで出力部４が回転するように構成されている。図６（ａ），（ｂ）に示すように、他方の第２欠歯ギア３２が、被係合部としての凸部３２ｃを備え、この凸部３２ｃがプランジャー５に備えた後述の係合部５３Ｂに周方向で当接して係合することで第２欠歯ギア３２の回転が阻止される。また、プランジャー５の作動時に前記係合が解除されることで自由状態になった第２欠歯ギア３２を所定量回転させて駆動ギア２に第２欠歯ギア３２の有歯部３２Ａを噛合わせるためのねじりコイルバネ８を備えている。このねじりコイルバネ８により第２欠歯ギア３２を所定量回転させたときに、第１欠歯ギア３１に備える被係合部３１１に周方向で当接して係合することで第１欠歯ギア３１を回転させるギア係合部３２１を第２欠歯ギア３２に備えている（図５（ａ），（ｂ）参照）。ねじりコイルバネ８は、一端が第１欠歯ギア３１に取り付けられ、他端が第２欠歯ギア３２に取り付けられている。 The output unit 4 is made of a square tubular member, and one end of the output unit 4 is integrally rotatably connected to the first missing tooth gear 31 of one of the missing tooth gears 31 and 32. The output unit 4 is configured to rotate when the toothed portion 31A of the first missing tooth gear 31 meshes with the drive gear 2 as the tooth gear 31 rotates. As shown in FIGS. 6A and 6B, the other second missing tooth gear 32 includes a convex portion 32c as an engaged portion, and the convex portion 32c is provided on the plunger 5, which will be described later. The rotation of the second missing tooth gear 32 is prevented by abutting and engaging with the joint portion 53B in the circumferential direction. Further, when the plunger 5 is operated, the second missing tooth gear 32, which has become free due to the disengagement, is rotated by a predetermined amount, and the toothed portion 32A of the second missing tooth gear 32 is attached to the drive gear 2. A torsion coil spring 8 for meshing is provided. When the second missing tooth gear 32 is rotated by a predetermined amount by the torsion coil spring 8, the first missing tooth gear is engaged with the engaged portion 311 provided in the first missing tooth gear 31 in the circumferential direction. The second missing tooth gear 32 is provided with a gear engaging portion 321 for rotating 31 (see FIGS. 5A and 5B). One end of the torsion coil spring 8 is attached to the first missing tooth gear 31, and the other end is attached to the second missing tooth gear 32.
図５（ａ），（ｂ）に示すように、第１欠歯ギア３１の被係合部３１１は、周方向に等間隔を置いて軸方向に突出する４つの略扇型の第１突起部３１１Ａ，３１１Ｂ，３１１Ｃ，３１１Ｄから構成されている。これに対して第２欠歯ギア３２のギア係合部３２１は、径方向で対向するように周方向の２箇所に軸方向に突出する２つの略矩形状の第２突出部３２１Ａ，３２１Ｂから構成されている。前記周方向で隣り合う第１突起部３１１Ａ，３１１Ｂ、３１１Ｂ，３１１Ｃ、３１１Ｃ，３１１Ｄ、３１１Ｄ，３１１Ａ間に発生する４つのスペースＳ１，Ｓ２，Ｓ３，Ｓ４のうちの径方向で対向する２つのスペースＳ１，Ｓ３に第２突起部３２１Ａ，３２１Ｂを配置する。つまり、第２欠歯ギア３２の回転により、第１突起部３１１Ａに第２突起部３２１Ａが周方向で当接し、かつ、第１突起部３１１Ｃに第２突起部３２１Ｂが周方向で当接するように、第２突起部３２１Ａ，３２１Ｂを配置する。そして、第２欠歯ギア３２を、ねじりコイルバネ８により所定量回転させることにより、第２欠歯ギア３２の第２突出部３２１Ａ，３２１Ｂが第１突起部３１１Ｂ，３１１Ｄに周方向で係合（当接）し（図５（ａ）に２点鎖線参照）、さらに第２欠歯ギア３２が回転することで、第２欠歯ギア３２の回転力を受けて第１欠歯ギア３１が供回りするように構成されている。なお、第２欠歯ギア３２の第２突出部３２１Ａ，３２１Ｂが第１突起部３１１Ｂ，３１１Ｄに係合（当接）するタイミングは、２枚の欠歯ギア３１，３２の欠歯部３１Ｂ，３２Ｂの形成範囲等に応じて変更することになる。 As shown in FIGS. 5A and 5B, the engaged portion 311 of the first missing tooth gear 31 has four substantially fan-shaped first protrusions protruding in the axial direction at equal intervals in the circumferential direction. It is composed of parts 311A, 311B, 311C, and 311D. On the other hand, the gear engaging portion 321 of the second missing tooth gear 32 is formed from two substantially rectangular second protruding portions 321A and 321B that project in the axial direction at two locations in the circumferential direction so as to face each other in the radial direction. It is configured. Two spaces facing each other in the radial direction of the four spaces S1, S2, S3, and S4 generated between the first protrusions 311A, 311B, 311B, 311C, 311C, 311D, 311D, and 311A that are adjacent to each other in the circumferential direction. The second protrusions 321A and 321B are arranged in S1 and S3. That is, due to the rotation of the second missing tooth gear 32, the second protrusion 321A abuts on the first protrusion 311A in the circumferential direction, and the second protrusion 321B abuts on the first protrusion 311C in the circumferential direction. The second protrusions 321A and 321B are arranged therein. Then, by rotating the second missing tooth gear 32 by a predetermined amount by the torsion coil spring 8, the second protruding portions 321A and 321B of the second missing tooth gear 32 engage with the first protruding portion 311B and 311D in the circumferential direction ( (Abutting) (see the two-point chain line in FIG. 5A), and further rotating the second missing tooth gear 32 causes the first missing tooth gear 31 to receive the rotational force of the second missing tooth gear 32. It is configured to rotate. The timing at which the second protruding portions 321A and 321B of the second missing tooth gear 32 engage (contact) with the first protruding portions 311B and 311D is such that the missing tooth portions 31B of the two missing tooth gears 31 and 32 It will be changed according to the formation range of 32B and the like.
図３及び図４に示すように、第１欠歯ギア３１は、外周面に有歯部３１Ａと欠歯部３１Ｂとが形成されたギア部の径方向中心部に出力部４に外嵌するように形成された円筒部３１ａと、円筒部３１ａの第２欠歯ギア３２端からプランジャー５側へ延びる軸構成部材３１ｂと、を備えている。軸構成部材３１ｂの第１欠歯ギア３１から離間する軸方向先端部には、後述するフィールド１１のカバー部１１Ｂが先端側から抜けてしまうことを阻止するべく周方向の４か所に係止部３１Ｈが形成されている。周方向で隣り合う係止部３１Ｈ，３１Ｈ間には、軸方向に沿うようにＵの字状の切欠き３１Ｋが形成されており、外力を加えることで４つの係止部３１Ｈを径方向内側に弾性変形させてプランジャー５、後述するフィールド１１のカバー部１１Ｂを軸構成部材３１ｂに外装することができるようにしている。 As shown in FIGS. 3 and 4, the first missing tooth gear 31 is fitted onto the output portion 4 at the radial center of the gear portion in which the toothed portion 31A and the missing tooth portion 31B are formed on the outer peripheral surface. A cylindrical portion 31a formed as described above and a shaft component 31b extending from the end of the second missing tooth gear 32 of the cylindrical portion 31a toward the plunger 5 side are provided. The axial tip portion of the shaft component member 31b separated from the first missing tooth gear 31 is locked at four locations in the circumferential direction in order to prevent the cover portion 11B of the field 11 described later from coming off from the tip side. Part 31H is formed. A U-shaped notch 31K is formed along the axial direction between the locking portions 31H and 31H adjacent to each other in the circumferential direction, and the four locking portions 31H are radially inside by applying an external force. The plunger 5 and the cover portion 11B of the field 11, which will be described later, can be elastically deformed to the shaft constituent member 31b.
第２欠歯ギア３２は、外周面に有歯部３２Ａと欠歯部３２Ｂとが形成されたギア部の径方向中心部に第１欠歯ギア３１の円筒部３１ａに外嵌されて回転可能に支持するボス部３２ａと、を備えている。このように第１欠歯ギア３１の円筒部３１ａに第２欠歯ギア３２のボス部３２ａを径方向で重ね合わせることによって、軸方向でのコンパクト化を図っている。また、ボス部３２ａの周方向２箇所に、軸方向に突出する一対の係止爪３２ｂ，３２ｂ（図１、図４参照）を備えている。これら係止爪３２ｂ，３２ｂを、第１欠歯ギア３１に形成の円弧状の長孔３１Ｌ，３１Ｌに挿通させて第１欠歯ギア３１の一側面に係止させることで、第１欠歯ギア３１に対する軸方向での第２欠歯ギア３２の位置決めを行うことができる。 The second missing tooth gear 32 is rotatable by being fitted onto the cylindrical portion 31a of the first missing tooth gear 31 at the radial center of the gear portion having the toothed portion 32A and the missing tooth portion 32B formed on the outer peripheral surface. It is provided with a boss portion 32a that supports the teeth. By superimposing the boss portion 32a of the second missing tooth gear 32 on the cylindrical portion 31a of the first missing tooth gear 31 in the radial direction in this way, the compactness in the axial direction is achieved. Further, a pair of locking claws 32b and 32b (see FIGS. 1 and 4) protruding in the axial direction are provided at two locations in the circumferential direction of the boss portion 32a. The locking claws 32b, 32b are inserted into the arcuate elongated holes 31L, 31L formed in the first missing tooth gear 31 and locked to one side surface of the first missing tooth gear 31 to lock the first missing tooth. The second missing tooth gear 32 can be positioned in the axial direction with respect to the gear 31.
プランジャー５は、円筒状の本体部５１と、本体部５１の一端（第２欠歯ギア３２側端）に一体形成されるフランジ部５２と、を備え、フランジ部５２の第２欠歯ギア３２側の端面５２Ａに突出部５３を備えている。この突出部５３は、中心部に円環状の第１突出部５３Ａと、第１突出部５３Ａの周方向１箇所に径方向外側に扇形状に延びる第２突出部５３Ｂと、を備え、この第２突出部５３Ｂが、第２欠歯ギア３２のプランジャー５側の端面３２Ｃに形成された円弧状の凸部３２ｃに周方向で当接して係合する係合部を構成している。この第２突出部５３Ｂが凸部３２ｃに係合（当接）することによって、第２欠歯ギア３２の回転が阻止され、駆動ギア２からの駆動回転力が第２欠歯ギア３２、第１欠歯ギア３１を通して出力部４へ伝達されないように構成されている。前記凸部３２ｃは、第２欠歯ギア３２の回転方向下流側ほど突出量が小さくなるテーパー面を形成している。このテーパー面を形成しているのは、プランジャー５を作動させて前記係合を解除した後、直ちにプランジャー５を被作動状態にした時に、第２突出部５３Ｂが凸部３２ｃに乗り上げた状態となり、この状態から第２突出部５３Ｂが凸部３２ｃのテーパー面に案内されて第２欠歯ギア３２のプランジャー５側の端面３２Ｃに段差の少ない状態で着地することで、第２突出部５３Ｂが端面３２Ｃに着地した時に大きな当接音がしないようにしている。 The plunger 5 includes a cylindrical main body portion 51 and a flange portion 52 integrally formed at one end of the main body portion 51 (the end on the side of the second missing tooth gear 32), and the second missing tooth gear of the flange portion 52. A protruding portion 53 is provided on the end surface 52A on the 32 side. The protrusion 53 includes an annular first protrusion 53A at the center and a second protrusion 53B extending radially outward in a fan shape at one location in the circumferential direction of the first protrusion 53A. The two protrusions 53B constitute an engaging portion that abuts and engages with the arcuate convex portion 32c formed on the end surface 32C on the plunger 5 side of the second missing tooth gear 32 in the circumferential direction. By engaging (contacting) the second protruding portion 53B with the convex portion 32c, the rotation of the second missing tooth gear 32 is prevented, and the driving rotational force from the driving gear 2 is applied to the second missing tooth gear 32 and the second missing tooth gear 32. 1 It is configured so that it is not transmitted to the output unit 4 through the missing tooth gear 31. The convex portion 32c forms a tapered surface in which the amount of protrusion decreases toward the downstream side in the rotation direction of the second missing tooth gear 32. This tapered surface is formed by the second protruding portion 53B riding on the convex portion 32c when the plunger 5 is immediately put into the actuated state after the plunger 5 is operated to disengage the engagement. From this state, the second protruding portion 53B is guided to the tapered surface of the convex portion 32c and lands on the end surface 32C of the second missing tooth gear 32 on the plunger 5 side with few steps, so that the second protruding portion 53B protrudes. When the portion 53B lands on the end surface 32C, a loud contact noise is prevented.
また、プランジャー５の非作動時に係合部である第２突出部５２Ｂが被係合部である凸部３２ｃに係合するようにプランジャー５を移動付勢するための付勢手段７として渦巻きバネを用いている。この付勢手段（渦巻きバネ）７は、図３に示すように、プランジャー５のフランジ部５２とボビン１０との間に配置されている。したがって、プランジャー５を作動させることにより付勢手段７による付勢力に抗して前記係合を解除することで駆動ギア２の駆動回転力が、第２欠歯ギア３２、第１欠歯ギア３１を通して出力部４へ伝達されるように構成されている。前記渦巻きバネを用いることによって、プランジャー５を作動させて渦巻きバネを短縮状態にした時に線材１本分の太さになるので、コイルバネのように線材が重なるものに比べて軸方向のスペースを小さくすることができ、クラッチの軸方向の寸法を短くでき、好ましいが、コイルバネであってもよい。 Further, as an urging means 7 for moving and urging the plunger 5 so that the second protruding portion 52B, which is an engaging portion, engages with the convex portion 32c, which is an engaged portion, when the plunger 5 is not activated. A spiral spring is used. As shown in FIG. 3, the urging means (swirl spring) 7 is arranged between the flange portion 52 of the plunger 5 and the bobbin 10. Therefore, by operating the plunger 5 to disengage the engagement against the urging force by the urging means 7, the driving rotational force of the drive gear 2 is reduced to the second missing tooth gear 32 and the first missing tooth gear. It is configured to be transmitted to the output unit 4 through 31. By using the spiral spring, when the plunger 5 is operated to shorten the spiral spring, the thickness becomes the thickness of one wire rod, so that the space in the axial direction is increased as compared with the coil spring in which the wire rods overlap. It can be made smaller and the axial dimension of the clutch can be shortened, which is preferable, but it may be a coil spring.
コイル６は、径方向外側が開放されたボビン１０に巻回されており、コイル６が巻かれたボビン１０をフィールド（ケーシング）１１で覆っている。フィールド１１は、軸方向一端が開口され、ボビン１０を収容するためのフィールド本体１１Ａと、フィールド本体１１Ａの開口を閉じるカバー部１１Ｂと、を備えている。ボビン１０は、プランジャー５の径方向外側に配置されている。図３、図４に示す１２は、端子カバーである。 The coil 6 is wound around a bobbin 10 whose outer side in the radial direction is open, and the bobbin 10 around which the coil 6 is wound is covered with a field (casing) 11. The field 11 includes a field main body 11A for accommodating the bobbin 10 having one end opened in the axial direction, and a cover portion 11B for closing the opening of the field main body 11A. The bobbin 10 is arranged on the radial outer side of the plunger 5. 12 shown in FIGS. 3 and 4 is a terminal cover.
このように構成されたクラッチ１の動作について説明する。プランジャー５の非作動時では、付勢手段７の反発力により第２欠歯ギア３２の被係合部３２ｃとプランジャー５の係合部５３Ｂとが周方向で当接して係合する。この状態では、第２欠歯ギア３２の回転が阻止されるため、２枚の欠歯ギア３１，３２の欠歯部３１Ｂ，３２Ｂに駆動ギア２が一致した状態が保たれる（図１参照）。したがって、駆動ギア２が空回りするだけで、駆動ギア２からの駆動回転力が、第２欠歯ギア３２を介して第１欠歯ギア３１に伝達されないため、出力部４へ伝達されない。図示していない制御部からの信号によりコイル６に電力を供給すると、プランジャー５が磁力による吸引力を受けて図３の状態からコイル６側に移動してプランジャー５の係合部５３Ｂが第２欠歯ギア３２の被係合部３２ｃから係合解除する。これによりフリーになった第２欠歯ギア３２がねじりコイルバネ８のねじり力により所定量回転する。これにより図２に示すように第２欠歯ギア３２の有歯部３２Ａが駆動ギア２に噛み合うことで第２欠歯ギア３２が駆動ギア２の回転力を受けて供回りする。第２欠歯ギア３２の有歯部３２Ａが駆動ギア２に噛み合うと同時に、第１欠歯ギア３１の被係合部３１１に第２欠歯ギア３２のギア係合部３２１が周方向で当接して係合することで、第２欠歯ギア３２から少し遅れて第１欠歯ギア３１の回転が開始する。図２は、第１欠歯ギア３１の被係合部３１１に第２欠歯ギア３２のギア係合部３２１が周方向で当接（係合）して第２欠歯ギア３２が回転する直前の状態を示している。プランジャー５を作動させて係合を解除した後は、直ちに非作動状態に戻すことになる。第１欠歯ギア３１が一回転すると、第１欠歯ギア３１の欠歯部３１Ｂが駆動ギア２に一致する位置となると同時にプランジャー５の係合部５３Ｂが第２欠歯ギア３２の被係合部３２ｃに周方向で当接して係合することで第２欠歯ギア３２の欠歯部３２Ｂに駆動ギア２が一致した状態が保たれる。続いて、遅れて第２欠歯ギア３２が一回転すると、第２欠歯ギア３２の欠歯部３２Ｂが駆動ギア２に一致する位置となり、第２欠歯ギア３２の回転が停止する。図示していない制御部からの信号が出力される度に、前記した動作を繰り返す。 The operation of the clutch 1 configured in this way will be described. When the plunger 5 is not operating, the repulsive force of the urging means 7 causes the engaged portion 32c of the second missing tooth gear 32 and the engaging portion 53B of the plunger 5 to come into contact with each other in the circumferential direction and engage with each other. In this state, since the rotation of the second missing tooth gear 32 is blocked, the drive gear 2 is maintained in a state of being aligned with the missing tooth portions 31B and 32B of the two missing tooth gears 31 and 32 (see FIG. 1). ). Therefore, only the drive gear 2 idles, and the drive rotational force from the drive gear 2 is not transmitted to the first missing tooth gear 31 via the second missing tooth gear 32, so that it is not transmitted to the output unit 4. When power is supplied to the coil 6 by a signal from a control unit (not shown), the plunger 5 receives an attractive force due to a magnetic force and moves from the state of FIG. 3 to the coil 6 side, and the engaging portion 53B of the plunger 5 moves. The engagement is disengaged from the engaged portion 32c of the second missing tooth gear 32. As a result, the free second missing tooth gear 32 rotates by a predetermined amount due to the torsional force of the torsion coil spring 8. As a result, as shown in FIG. 2, the toothed portion 32A of the second missing tooth gear 32 meshes with the drive gear 2, so that the second missing tooth gear 32 receives the rotational force of the drive gear 2 and rotates. At the same time that the toothed portion 32A of the second missing tooth gear 32 meshes with the drive gear 2, the gear engaging portion 321 of the second missing tooth gear 32 hits the engaged portion 311 of the first missing tooth gear 31 in the circumferential direction. By contacting and engaging, the rotation of the first missing tooth gear 31 starts with a slight delay from the second missing tooth gear 32. In FIG. 2, the gear engaging portion 321 of the second missing tooth gear 32 abuts (engages) with the engaged portion 311 of the first missing tooth gear 31 in the circumferential direction, and the second missing tooth gear 32 rotates. It shows the state immediately before. After the plunger 5 is operated and disengaged, it is immediately returned to the non-operating state. When the first missing tooth gear 31 makes one rotation, the missing tooth portion 31B of the first missing tooth gear 31 becomes a position corresponding to the drive gear 2, and at the same time, the engaging portion 53B of the plunger 5 is covered with the second missing tooth gear 32. By contacting and engaging with the engaging portion 32c in the circumferential direction, the state in which the drive gear 2 is aligned with the missing tooth portion 32B of the second missing tooth gear 32 is maintained. Subsequently, when the second missing tooth gear 32 makes one rotation with a delay, the missing tooth portion 32B of the second missing tooth gear 32 becomes a position corresponding to the drive gear 2, and the rotation of the second missing tooth gear 32 stops. Each time a signal from a control unit (not shown) is output, the above operation is repeated.
＜第２実施形態＞
本発明の第２実施形態のクラッチ１３は、図７〜図９に示すように、駆動源である駆動ギア２からの駆動回転力が入力される回転可能な入力部１４と、入力部１４と同軸上に回転する回転可能な出力部１５と、入力部１４及び出力部１５と同軸上を軸方向に移動するプランジャー１６と、プランジャー１６と同軸上に配置されプランジャー１６を作動させるコイル１７と、プランジャー１６の非作動時に後述する係合部１６Ａが後述する被係合部２２Ａに係合するようにプランジャー１６を移動付勢するための付勢手段１８と、を備え、プランジャー１６を作動させることにより係合を解除することで駆動ギア２からの駆動回転力が入力部１４から出力部１５へ伝達されるように構成されている。
<Second Embodiment>
As shown in FIGS. 7 to 9, the clutch 13 of the second embodiment of the present invention includes a rotatable input unit 14 to which a drive rotational force from a drive gear 2 which is a drive source is input, and an input unit 14. A rotatable output unit 15 that rotates coaxially, a plunger 16 that moves axially axially on the input unit 14 and the output unit 15, and a coil that is arranged coaxially with the plunger 16 and operates the plunger 16. A plan including 17 and an urging means 18 for moving and urging the plunger 16 so that the engaging portion 16A described later engages with the engaged portion 22A described later when the plunger 16 is not activated. The drive rotational force from the drive gear 2 is transmitted from the input unit 14 to the output unit 15 by disengaging the engagement by operating the jar 16.
入力部１４は、駆動ギア２に常時噛み合って駆動回転される入力ギア１４Ａと、入力ギア１４Ａに内嵌される円環状の入力リング１４Ｂと、を備えている。図１５に示すように、入力ギア１４Ａの内周面の周方向複数個所（図では３か所）に内側に突出する突出部１４ａを備え、これら突出部１４ａに係合する凹部１４ｂが突出部１４ａに対応するように入力リング１４Ｂの外周面に備えている。したがって、入力ギア１４Ａが回転すると、入力リング１４Ｂが一体回転するように構成されている。なお、入力ギア１４Ａは、プランジャー１６側へ延びてプランジャー１６の一部を覆うカバー部１４Ｋを備えている。このカバー部１４Ｋを備えることにより、プランジャー１６の一部を覆うためのカバー部材を用意する必要がない。 The input unit 14 includes an input gear 14A that is constantly meshed with the drive gear 2 and is driven and rotated, and an annular input ring 14B that is internally fitted in the input gear 14A. As shown in FIG. 15, protrusions 14a projecting inward are provided at a plurality of locations (three locations in the figure) in the circumferential direction of the inner peripheral surface of the input gear 14A, and recesses 14b engaging with these protrusions 14a project. It is provided on the outer peripheral surface of the input ring 14B so as to correspond to 14a. Therefore, when the input gear 14A rotates, the input ring 14B is configured to rotate integrally. The input gear 14A includes a cover portion 14K that extends toward the plunger 16 side and covers a part of the plunger 16. By providing the cover portion 14K, it is not necessary to prepare a cover member for covering a part of the plunger 16.
入力部１４と出力部１５との間には、入力部１４からの駆動回転力を出力部１５に伝達する状態と伝達しない状態とに切り替える断続部を備えている。断続部は、図８、図９、図１１、図１２及び図１５に示すように、複数（ここでは３つであるが、１つ又は２つ又は４つ以上の任意の個数）の円柱状のロックピン１９と、これらロックピン１９を保持するピンガイド２０と、ピンガイド２０に備える被係合部２２Ａと、プランジャー１６に設けられ被係合部２２Ａに係合する係合部１６Ａと、プランジャー１６の非作動時にプランジャー１６の係合部１６Ａをピンガイド２０の被係合部２２Ａに係合するようにプランジャー１６を移動付勢する前記付勢手段１８と、プランジャー１６を作動させてプランジャー１６の係合部１６Ａとピンガイド２０の被係合部２２Ａとの係合が解除された時にピンガイド２０を所定量回転させるための捩じりコイルバネからなるピンガイドバネ２１と、を備えている。ピンガイドバネ２１は、一端がピンガイド２０に取り付けられ、他端が出力部１５に取り付けられている。 An intermittent unit is provided between the input unit 14 and the output unit 15 to switch between a state in which the driving rotational force from the input unit 14 is transmitted to the output unit 15 and a state in which the driving rotational force is not transmitted to the output unit 15. As shown in FIGS. 8, 9, 11, 12, and 15, a plurality of intermittent portions (three here, but any number of one, two, or four or more) are columnar. Lock pin 19, the pin guide 20 that holds these lock pins 19, the engaged portion 22A provided in the pin guide 20, and the engaging portion 16A provided on the plunger 16 and engaged with the engaged portion 22A. The urging means 18 for moving and urging the plunger 16 so that the engaging portion 16A of the plunger 16 engages with the engaged portion 22A of the pin guide 20 when the plunger 16 is not operating, and the plunger 16 A pin guide spring composed of a torsion coil spring for rotating the pin guide 20 by a predetermined amount when the engagement portion 16A of the plunger 16 and the engaged portion 22A of the pin guide 20 are disengaged by operating. 21 and. One end of the pin guide spring 21 is attached to the pin guide 20, and the other end is attached to the output unit 15.
出力部１５は、軸方向一端側から他端側に長い筒状に構成され、軸方向一端から、入力ギア１４Ａを回転自在に支持するために形成された支持部１５Ａ、入力部１４からの駆動回転力を伝達可能な断面形状が６角形状の動力伝達部１５Ｂ、プランジャー１６、後述するフィールド２５のカバー部２５Ｂが嵌合支持する円筒状の軸方向に長い軸構成部材１５Ｃ、を軸方向他端に向かって一体形成している。支持部１５Ａは、軸方向一端に周方向に間隔を置いて３か所のそれぞれに入力ギア１４Ａが抜けないように入力ギア１４Ａを係止保持する係止爪１５ａを備えるとともに、軸方向他端に入力ギア１４Ａの他端側への移動を阻止するためのフランジ部１５Ｆを備えている。軸構成部材１５Ｃの軸方向他端には、後述するフィールド２５のカバー部２５Ｂが他端側から抜けてしまうことを阻止するべく周方向の４か所に係止部１５Ｋが形成されている（図１３、図１４参照）。周方向で隣り合う係止部１５Ｋ，１５Ｋ間には、軸方向に沿うようにＵの字状の切欠き１５Ｕが形成されており、４つの係止部１５Ｋを径方向内側に弾性変形させてプランジャー１６、後述するフィールド２５のカバー部２５Ｂを軸構成部材１５Ｃに装着することができるようにしている。 The output unit 15 is formed in a long cylindrical shape from one end side in the axial direction to the other end side, and is driven from the support unit 15A and the input unit 14 formed to rotatably support the input gear 14A from one end in the axial direction. Axial directions include a power transmission portion 15B having a hexagonal cross section capable of transmitting rotational force, a plunger 16, and a cylindrical axially long shaft component 15C fitted and supported by a cover portion 25B of a field 25 described later. It is integrally formed toward the other end. The support portion 15A is provided with a locking claw 15a that locks and holds the input gear 14A at one end in the axial direction at intervals in the circumferential direction so that the input gear 14A does not come off, and the other end in the axial direction. Is provided with a flange portion 15F for preventing the input gear 14A from moving to the other end side. At the other end of the shaft component 15C in the axial direction, locking portions 15K are formed at four locations in the circumferential direction in order to prevent the cover portion 25B of the field 25, which will be described later, from coming off from the other end side. 13 and 14). A U-shaped notch 15U is formed along the axial direction between the locking portions 15K and 15K adjacent to each other in the circumferential direction, and the four locking portions 15K are elastically deformed inward in the radial direction. The plunger 16 and the cover portion 25B of the field 25, which will be described later, can be attached to the shaft component 15C.
ピンガイド２０は、プランジャー１６の係合部１６Ａに軸方向で係合するようにプランジャー１６側に突出する被係合部２２Ａを備えた円環状のピンガイド本体２２と、ピンガイド本体２２の周方向に間隔を開けて軸方向に突出する円弧状の複数（図では９つ）の突起部２３と、を備えている、これら突起部２３は、径方向の厚みが厚い第１突起部２３Ａと、厚みの薄い第２突起部２３Ｂと、を備えている。第１突起部２３Ａは、周方向の３か所に周方向で隣り合うように２つずつ配置され、２つの第１突起部２３Ａ，２３Ａの対向面のそれぞれにロックピン１９を保持する円弧面２３ａが形成されている。被係合部２２Ａは、ピンガイド本体２２の外周縁の一箇所に備えた円弧状の突起から構成されている。 The pin guide 20 includes an annular pin guide main body 22 having an engaged portion 22A protruding toward the plunger 16 so as to engage with the engaging portion 16A of the plunger 16 in the axial direction, and a pin guide main body 22. A plurality of arc-shaped (nine in the figure) protrusions 23 that protrude in the axial direction at intervals in the circumferential direction of the above, and these protrusions 23 are first protrusions that are thick in the radial direction. It includes 23A and a thin second protrusion 23B. The first protrusions 23A are arranged at three locations in the circumferential direction so as to be adjacent to each other in the circumferential direction, and an arc surface holding a lock pin 19 on each of the facing surfaces of the two first protrusions 23A and 23A. 23a is formed. The engaged portion 22A is composed of an arc-shaped protrusion provided at one position on the outer peripheral edge of the pin guide main body 22.
コイル１７は、径方向外側が開放されたボビン２４に巻回されており、コイル１７が巻かれたボビン２４をフィールド（ケーシング）２５で覆っている。フィールド２５は、軸方向一端が開口され、ボビン２４を収容するためのフィールド本体２５Ａと、フィールド本体２５Ａの開口を閉じるカバー部２５Ｂと、を備えている。ボビン２４は、プランジャー１６の径方向外側に配置されている。図８、図９に示す２６は、端子カバーである。 The coil 17 is wound around a bobbin 24 whose radial outer side is open, and the bobbin 24 around which the coil 17 is wound is covered with a field (casing) 25. The field 25 includes a field main body 25A for accommodating the bobbin 24 at one end in the axial direction, and a cover portion 25B for closing the opening of the field main body 25A. The bobbin 24 is arranged on the radial outer side of the plunger 16. 26 shown in FIGS. 8 and 9 is a terminal cover.
プランジャー１６は、図６（ｂ）と同様に、円筒状の本体部１６ａと、本体部１６ａの一端（入力ギア１４Ａ側端）に一体形成されるフランジ部１６ｂと、を備えている。フランジ部１６ｂのピンガイド２０側の端面１６Ｈに突出部を備えている。この突出部は、中心部に円環状の第１突出部２７Ａと、第１突出部２７Ａの周方向１箇所に径方向外側に扇形状に延びる第２突出部２７Ｂと、を備え、この第２突出部２７Ｂが、ピンガイド２０の被係合部２２Ａに係合する係合部１６Ａ（図１０〜図１４参照）を構成している。この第２突出部２７Ｂが被係合部２２Ａに係合することによって、ピンガイド２０の回転が阻止されて、駆動ギア２からの駆動回転力が出力部１５へ伝達されないように構成されている。 Similar to FIG. 6B, the plunger 16 includes a cylindrical main body portion 16a and a flange portion 16b integrally formed at one end of the main body portion 16a (the end on the input gear 14A side). A protruding portion is provided on the end surface 16H of the flange portion 16b on the pin guide 20 side. The protruding portion includes a first annular portion 27A at the center thereof and a second protruding portion 27B extending radially outward in a fan shape at one location in the circumferential direction of the first protruding portion 27A. The protruding portion 27B constitutes an engaging portion 16A (see FIGS. 10 to 14) that engages with the engaged portion 22A of the pin guide 20. By engaging the second protruding portion 27B with the engaged portion 22A, the rotation of the pin guide 20 is prevented, and the driving rotational force from the driving gear 2 is not transmitted to the output portion 15. ..
付勢手段１８は、プランジャー１６のフランジ部１６ｂとボビン２４との間に配置された渦巻きバネから構成されている。このように渦巻きバネを用いることによって、プランジャー１６を作動させて渦巻きバネを短縮状態にした時に線材１本分の太さになるので、コイルバネのように線材が重なるものに比べて軸方向のスペースを小さくすることができ、クラッチの軸方向の寸法を短くでき、好ましいが、コイルバネであってもよい。 The urging means 18 is composed of a spiral spring arranged between the flange portion 16b of the plunger 16 and the bobbin 24. By using the spiral spring in this way, when the plunger 16 is operated to shorten the spiral spring, the thickness becomes the thickness of one wire rod, so that the thickness of the wire rod is larger than that of a coil spring in which the wire rods overlap. The space can be reduced, the axial dimension of the clutch can be shortened, which is preferable, but a coil spring may be used.
このように構成されたクラッチ１３の動作について説明する。プランジャー１６の非作動時では、付勢手段１８の反発力によりプランジャー１６の係合部１６Ａとピンガイド２０の被係合部２２Ａとが係合し（図１３参照）、ピンガイド２０の回転が阻止される。この状態では、入力ギア１４Ａと入力リング１４Ｂが空回りするだけで、駆動ギア２からの駆動回転力が、入力リング１４Ｂ、ピンガイド２０を介して出力部１５に伝達されない。図示していない制御部からの信号によりコイル１７に電力が供給されると、プランジャー１６が磁力による吸引力を受けて図８の状態からコイル側に移動してプランジャー１６の係合部１６Ａがピンガイド２０の被係合部２２Ａから係合解除される。これによりフリーになったピンガイド２０が図１５の位置からねじりコイルバネ２１により図１６の位置になるまで所定量回転（図１５では反時計回りに所定量回転）する。すると、３つのロックピン１９が６角形状の動力伝達部１５Ｂの周方向で隣り合う角部間の中央部の最も隙間の大きな位置から隙間が小さくなる角部に向かって移動する。この移動により３つのロックピン１９が動力伝達部１５Ｂと入力リング１４Ｂとの間に挟まれた状態となり、入力ギア１４Ａの駆動回転力がロックピン１９を介して動力伝達部１５Ｂに伝達される。これにより、出力部１５が入力ギア１４Ａと一緒に回転する。プランジャー１６は、作動させて係合を解除した後は、非作動状態に戻すことになる。そして、入力ギア１４Ａが一回転すると、プランジャー１６の係合部１６Ａがピンガイド２０の被係合部２２Ａに係合して、ピンガイド２０の回転が阻止されると同時に３つのロックピン１９が６角形状の動力伝達部１５Ｂの周方向で隣り合う角部間の中央部の最も大きな隙間に位置する。これにより、入力ギア１４Ａの駆動回転力がロックピン１９を介して動力伝達部１５Ｂに伝達されない状態が保たれる。図示していない制御部からの信号が出力される度に、前記した動作を繰り返す。尚、図１５においてピンガイド２０をねじりコイルバネ２１により反時計回りに回転させるように構成したが、ねじりコイルバネ２１の付勢方向を反対方向になるように構成することによって、図１５において時計回りに所定量回転させるようにしてもよい。 The operation of the clutch 13 configured in this way will be described. When the plunger 16 is not activated, the engaging portion 16A of the plunger 16 and the engaged portion 22A of the pin guide 20 are engaged by the repulsive force of the urging means 18 (see FIG. 13), and the pin guide 20 is engaged. Rotation is blocked. In this state, the input gear 14A and the input ring 14B only idle, and the drive rotational force from the drive gear 2 is not transmitted to the output unit 15 via the input ring 14B and the pin guide 20. When power is supplied to the coil 17 by a signal from a control unit (not shown), the plunger 16 receives an attractive force due to a magnetic force and moves from the state of FIG. 8 to the coil side, and the engaging portion 16A of the plunger 16 Is disengaged from the engaged portion 22A of the pin guide 20. As a result, the free pin guide 20 is rotated by a predetermined amount from the position of FIG. 15 to the position of FIG. 16 by the torsion coil spring 21 (rotation by a predetermined amount counterclockwise in FIG. 15). Then, the three lock pins 19 move from the position of the largest gap in the central portion between the adjacent corners in the circumferential direction of the hexagonal power transmission portion 15B toward the corner where the gap becomes smaller. Due to this movement, the three lock pins 19 are sandwiched between the power transmission unit 15B and the input ring 14B, and the driving rotational force of the input gear 14A is transmitted to the power transmission unit 15B via the lock pin 19. As a result, the output unit 15 rotates together with the input gear 14A. After the plunger 16 is operated and disengaged, the plunger 16 is returned to the non-operating state. Then, when the input gear 14A makes one rotation, the engaging portion 16A of the plunger 16 engages with the engaged portion 22A of the pin guide 20, the rotation of the pin guide 20 is prevented, and at the same time, the three lock pins 19 Is located in the largest gap in the center between the adjacent corners in the circumferential direction of the hexagonal power transmission unit 15B. As a result, the drive rotational force of the input gear 14A is maintained in a state in which it is not transmitted to the power transmission unit 15B via the lock pin 19. Each time a signal from a control unit (not shown) is output, the above operation is repeated. In FIG. 15, the pin guide 20 is configured to be rotated counterclockwise by the torsion coil spring 21, but by configuring the torsion coil spring 21 to be urged in the opposite direction, it is configured to rotate clockwise in FIG. It may be rotated by a predetermined amount.
以上、２つの実施形態のクラッチ１，１３は、出力部４，１５が入力部３，１４と同軸上に設けられ、プランジャー５，１６が入力部３，１４及び出力部４，１５と同軸上を軸方向に移動するように設けられ、コイル６がプランジャー５，１６と同軸上に配置されているので、取り付けスペースを小さく抑えることができる。また、構成部品を同軸上に組み付けるので、構成部品同士の隙間調整等の調整箇所も不要になる。また、動力伝達を係合及び係合解除で行うので、当接面が不要となる。このため、当接面の研磨加工、研磨後の洗浄工程、トルクアップ工程等の加工工程が全く不要になるだけでなく、当接面に錆が発生することもない。 As described above, in the clutches 1 and 13 of the two embodiments, the output units 4 and 15 are provided coaxially with the input units 3 and 14, and the plungers 5 and 16 are coaxial with the input units 3 and 14 and the output units 4 and 15. Since the coil 6 is provided so as to move in the axial direction on the top and the coil 6 is arranged coaxially with the plungers 5 and 16, the mounting space can be kept small. Further, since the components are assembled coaxially, adjustment points such as gap adjustment between the components are not required. Further, since the power transmission is performed by engaging and disengaging, the contact surface becomes unnecessary. Therefore, not only the processing steps such as the polishing process of the contact surface, the cleaning process after polishing, and the torque increasing process are completely unnecessary, but also the contact surface is not rusted.
以上、本発明につき２つの実施形態を取り上げて説明してきたが、本発明は、前記２つの実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で種々の変更が可能である。 Although the present invention has been described by taking up two embodiments of the present invention, the present invention is not limited to the above two embodiments, and various modifications can be made without departing from the gist of the present invention. ..
１…クラッチ、２…駆動ギア、３…入力部、４…出力部、５…プランジャー、６…コイル、７…付勢手段、８…ねじりコイルバネ、１０…ボビン、１１…フィールド（ケーシング）、１１Ａ…フィールド本体、１１Ｂ…カバー部、１２…端子カバー、１３…クラッチ、１４…入力部、１４Ａ…入力ギア、１４Ｂ…入力リング、１４Ｋ…カバー部、１４ａ…突出部、１４ｂ…凹部、１５…出力部、１５Ａ…支持部、１５Ｂ…動力伝達部、１５Ｃ…軸構成部材、１５Ｆ…フランジ部、１５Ｋ…係止部、１５Ｕ…切欠き、１５ａ…係止爪、１６…プランジャー、１６Ａ…係合部、１６Ｈ…端面、１６ａ…本体部、１６ｂ…フランジ部、１７…コイル、１８…付勢手段、１９…ロックピン、２０…ピンガイド、２１…ピンガイドバネ（ねじりコイルバネ）、２２…ピンガイド本体、２２Ａ…被係合部、２３…突起部、２３ａ…円弧面、２４…ボビン、２５…フィールド（ケーシング）、２５Ａ…フィールド本体、２５Ｂ…カバー部、３１，３２…欠歯ギア、３１Ａ，３２Ａ…有歯部、３１Ｂ，３２Ｂ…欠歯部、３１Ｈ…係止部、３１Ｌ…長孔、３１Ｋ…切欠き、３１ａ…円筒部、３１ｂ…軸構成部材、３２Ｃ…端面、３２ａ…ボス部、３２ｂ…係止爪、３２ｃ…凸部（被係合部）、５１…本体部、５２…フランジ部、５２Ａ…端面、５２Ｂ…係合部、５３…突出部、５３Ａ…第１突出部、５３Ｂ…第２突出部、３１１…被係合部、３２１…ギア係合部、Ｓ１，Ｓ２，Ｓ３，Ｓ４…スペース 1 ... Clutch, 2 ... Drive gear, 3 ... Input section, 4 ... Output section, 5 ... Plunger, 6 ... Coil, 7 ... Biasing means, 8 ... Torsion coil spring, 10 ... Bobbin, 11 ... Field (casing), 11A ... field body, 11B ... cover part, 12 ... terminal cover, 13 ... clutch, 14 ... input part, 14A ... input gear, 14B ... input ring, 14K ... cover part, 14a ... protrusion, 14b ... recess, 15 ... Output unit, 15A ... Support unit, 15B ... Power transmission unit, 15C ... Shaft component, 15F ... Flange part, 15K ... Locking part, 15U ... Notch, 15a ... Locking claw, 16 ... Plunger, 16A ... Joint part, 16H ... end face, 16a ... main body part, 16b ... flange part, 17 ... coil, 18 ... urging means, 19 ... lock pin, 20 ... pin guide, 21 ... pin guide spring (torsion coil spring), 22 ... pin Guide body, 22A ... engaged part, 23 ... protrusion, 23a ... arc surface, 24 ... bobbin, 25 ... field (casing), 25A ... field body, 25B ... cover part, 31, 32 ... missing tooth gear, 31A , 32A ... toothed part, 31B, 32B ... missing tooth part, 31H ... locking part, 31L ... long hole, 31K ... notch, 31a ... cylindrical part, 31b ... shaft component, 32C ... end face, 32a ... boss part , 32b ... Locking claw, 32c ... Convex part (engaged part), 51 ... Main body part, 52 ... Flange part, 52A ... End face, 52B ... Engaging part, 53 ... Protruding part, 53A ... First protruding part, 53B ... 2nd protruding part, 311 ... engaged part, 321 ... gear engaging part, S1, S2, S3, S4 ... space
Claims (2)
前記入力部と同軸上に回転する回転可能な出力部と、
前記入力部及び前記出力部と同軸上を軸方向に移動するプランジャーと、
前記プランジャーと同軸上に配置され該プランジャーを作動させるコイルと、を備え、
前記プランジャーは、係合部を備え、
前記入力部は、前記プランジャーの係合部が係合して該入力部の回転を阻止する被係合部を備え、
前記プランジャーの非作動時に前記係合部が前記被係合部に係合するように該プランジャーを移動付勢するための付勢手段を備え、
前記プランジャーを作動させることにより前記係合を解除することで前記駆動源からの駆動回転力が前記入力部から前記出力部へ伝達されるように構成されていることを特徴とするクラッチ。 A rotatable input unit to which the driving rotational force from the driving source is input,
A rotatable output unit that rotates coaxially with the input unit,
A plunger that moves coaxially with the input unit and the output unit in the axial direction,
A coil, which is arranged coaxially with the plunger and operates the plunger, is provided.
The plunger includes an engaging portion and
The input portion includes an engaged portion in which the engaging portion of the plunger engages to prevent the rotation of the input portion.
A urging means for moving and urging the plunger so that the engaging portion engages with the engaged portion when the plunger is not activated is provided.
A clutch characterized in that the drive rotational force from the drive source is transmitted from the input unit to the output unit by disengaging the engagement by operating the plunger.
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| JP2017211057A (en) * | 2016-05-27 | 2017-11-30 | 京セラドキュメントソリューションズ株式会社 | Drive transmission device and image forming apparatus including the same |
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| US4232772A (en) * | 1978-01-05 | 1980-11-11 | General Electric Company | Electromagnetically controlled, resettable high-speed shaft disconnect |
| JPH08160831A (en) * | 1994-12-05 | 1996-06-21 | Canon Inc | Driving force transmission mechanism and image forming device |
| JPH08169576A (en) * | 1994-12-20 | 1996-07-02 | Canon Inc | Sheet material feeder and image forming device |
| JP2006266399A (en) * | 2005-03-24 | 2006-10-05 | Canon Inc | Clutch mechanism and powder conveyance device and sheet conveyance device using it |
| JP2007064343A (en) * | 2005-08-31 | 2007-03-15 | Canon Inc | Power transmission device |
| CN102583075A (en) * | 2012-02-08 | 2012-07-18 | 珠海赛纳打印科技股份有限公司 | Paper feeding control device and imaging equipment |
| JP2017211057A (en) * | 2016-05-27 | 2017-11-30 | 京セラドキュメントソリューションズ株式会社 | Drive transmission device and image forming apparatus including the same |
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