JP2021087156A - Driving device, image reading device, and image forming apparatus - Google Patents

Driving device, image reading device, and image forming apparatus Download PDF

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JP2021087156A
JP2021087156A JP2019216148A JP2019216148A JP2021087156A JP 2021087156 A JP2021087156 A JP 2021087156A JP 2019216148 A JP2019216148 A JP 2019216148A JP 2019216148 A JP2019216148 A JP 2019216148A JP 2021087156 A JP2021087156 A JP 2021087156A
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motor
drive
drive unit
main body
support member
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JP7455560B2 (en
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祥悟 山▲崎▼
Shogo Yzmazaki
祥悟 山▲崎▼
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Canon Inc
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Canon Inc
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Abstract

To provide a driving device that can properly apply tension to a belt member.SOLUTION: A driving device 100 comprises: a driving unit 110 including a motor 1 and a driving pulley 11 that is driven to rotate by the motor 1; a main body unit 120 that includes a driven pulley 6 and supports the driving unit 110; a belt member 4 that is wound around the driving pulley 11 and the driven pulley 6; and an urging member 5 that is interposed between the driving unit 110 and the main body unit 120. The urging member 5 applies, to the driving unit 110, an urging force having a rotation axis direction component of the motor 1 directed toward the main body unit 120.SELECTED DRAWING: Figure 5

Description

本発明は、モータを備えた駆動装置に関する。 The present invention relates to a drive device including a motor.

画像読取装置や、画像形成装置の駆動機構には、離れた２軸間に回転やトルクを伝える巻き掛け伝動がしばしば必要とされる。一般にこのような機構は、モータの駆動プーリと、被駆動プーリと、これらの間に巻き掛けられるタイミングベルトと、を備えて構成されている。 The drive mechanism of an image reading device or an image forming device often requires a winding transmission that transmits rotation or torque between two distant axes. Generally, such a mechanism includes a drive pulley of a motor, a driven pulley, and a timing belt wound between them.

上記タイミングベルトを用いた駆動装置ないし駆動方法において、ベルトテンション（ベルトの張り具合）が小さすぎると、プーリとベルトとの間で噛み合わせが飛ぶことがある。また、ベルトテンションが大きすぎると軸の横倒れ方向に力がかかり駆動軸の負荷や振動が大きくなる。このため、タイミングベルトに適切なテンションを与えて駆動する必要があり、従来の駆動機構では、駆動部の重量によって適切なテンションを安定してタイミングベルトに与えることのできる駆動装置が設けられている（特許文献１参照）。 In the driving device or driving method using the timing belt, if the belt tension (belt tension) is too small, the meshing between the pulley and the belt may fly. Further, if the belt tension is too large, a force is applied in the lateral tilting direction of the shaft, and the load and vibration of the drive shaft become large. Therefore, it is necessary to apply an appropriate tension to the timing belt to drive the timing belt, and the conventional drive mechanism is provided with a drive device capable of stably applying an appropriate tension to the timing belt depending on the weight of the drive unit. (See Patent Document 1).

より具体的には、上記特許文献１記載の駆動装置は、図１５に示すように、ＤＣブラシレスモータ７００を、従動プーリ８００から遠ざかるように双方に高低差を設けて配置している。また、図１６に示すように、上記ＤＣブラシレスモータ７００はドライバ基板７００ｂと一体的に構成されている。そして、ＤＣブラシレスモータ７００を有する駆動部を遊嵌するための長孔７００ａが、ドライバ基板７００ｂの四隅に設けられている。 More specifically, in the drive device described in Patent Document 1, as shown in FIG. 15, the DC brushless motor 700 is arranged so as to be away from the driven pulley 800 with a height difference between them. Further, as shown in FIG. 16, the DC brushless motor 700 is integrally configured with the driver substrate 700b. The elongated holes 700a for loosely fitting the drive unit having the DC brushless motor 700 are provided at the four corners of the driver board 700b.

また、各長孔７００ａは、従動プーリ８００の支軸８００ａと、駆動プーリ７１０の回転中心７１０ａとを結ぶ直線Ｙに沿うように配置されている。各長孔７００ａに例えば、段付きネジが挿入されることにより、ＤＣブラシレスモータ７００は、装置本体側板上に移動可能に設置される。 Further, each elongated hole 700a is arranged along a straight line Y connecting the support shaft 800a of the driven pulley 800 and the rotation center 710a of the drive pulley 710. By inserting, for example, a stepped screw into each elongated hole 700a, the DC brushless motor 700 is movably installed on the side plate of the apparatus main body.

そして、ＤＣブラシレスモータ側との間にタイミングベルト９００が巻き掛けられると、駆動プーリ７１０とともにＤＣブラシレスモータ７００は、長孔７００ａにガイドされて上記直線方向Ｙの下方へ自重により移動する。すると、ＤＣブラシレスモータ７００は、長孔７００ａの下端に達する前にタイミングベルト９００で保持される。そして、モータ７００および駆動プーリ７１０からなる駆動部の重量により、タイミングベルト９００に所定のテンションを与えるように構成されている。 When the timing belt 900 is wound between the DC brushless motor side and the DC brushless motor side, the DC brushless motor 700 is guided by the elongated hole 700a together with the drive pulley 710 and moves downward in the linear direction Y by its own weight. Then, the DC brushless motor 700 is held by the timing belt 900 before reaching the lower end of the elongated hole 700a. Then, the timing belt 900 is configured to give a predetermined tension by the weight of the drive unit including the motor 700 and the drive pulley 710.

特開２０００−１３８８００号公報Japanese Unexamined Patent Publication No. 2000-138800

ところで、上記特許文献１に記載のような駆動装置の駆動部では、一般的に駆動プーリよりもモータ側に重心が位置する。このため、自重がベルト位置には掛からずプーリが傾き、適正なテンションがかからなくなる虞がある。また傾きを抑制するために段付きネジを用いると、駆動部との接触部に大きな負荷がかかるため、変形等の不具合が生じる虞がある。 By the way, in the drive unit of the drive device as described in Patent Document 1, the center of gravity is generally located on the motor side of the drive pulley. For this reason, the weight of the pulley is not applied to the belt position, the pulley is tilted, and an appropriate tension may not be applied. Further, if a stepped screw is used to suppress the inclination, a large load is applied to the contact portion with the drive portion, which may cause a problem such as deformation.

そこで、本発明は、ベルト部材に適正にテンションを付与することができる駆動装置、画像読取装置及び画像形成装置を提供することを目的とする。 Therefore, an object of the present invention is to provide a drive device, an image reading device, and an image forming device capable of appropriately applying tension to a belt member.

本発明の一態様は、モータと、前記モータによって回転駆動される駆動プーリと、を備えた駆動部と、被駆動プーリを備えていると共に、前記駆動部を支持する本体部と、前記駆動プーリ及び被駆動プーリに巻回されたベルト部材と、前記駆動部と前記本体部との間に介在する付勢部材と、を備え、前記付勢部材は、前記本体部に向かう前記モータの回転軸方向成分を有する付勢力を、前記駆動部に付与する、ことを特徴とする駆動装置である。 One aspect of the present invention includes a drive unit including a motor, a drive pulley that is rotationally driven by the motor, a main body unit that includes a driven pulley and supports the drive unit, and the drive pulley. A belt member wound around the driven pulley and an urging member interposed between the driving portion and the main body portion, and the urging member is a rotation shaft of the motor toward the main body portion. It is a drive device characterized in that an urging force having a directional component is applied to the drive unit.

また、本発明の他の一態様は、モータと、前記モータによって回転駆動される駆動プーリと、を備えた駆動部と、被駆動プーリを備えていると共に、前記駆動部を支持する本体部と、前記駆動プーリ及び被駆動プーリに巻回されたベルト部材と、を備え、前記駆動部は、前記モータの回転軸方向において前記駆動部が前記本体部に近づくように付勢する付勢部材の第１端部が係合する第１係合部を備え、前記本体部は、前記付勢部材の第２端部が係合する第２係合部を備えている、ことを特徴とする駆動装置である。 Further, another aspect of the present invention includes a drive unit including a motor, a drive pulley rotationally driven by the motor, and a main body unit including the driven pulley and supporting the drive unit. , A belt member wound around the drive pulley and the driven pulley, and the drive unit is an urging member that urges the drive unit to approach the main body in the rotation axis direction of the motor. The drive includes a first engaging portion with which the first end portion engages, and the main body portion includes a second engaging portion with which the second end portion of the urging member engages. It is a device.

本発明によると、ベルト部材に適正にテンションを付与することができる。 According to the present invention, tension can be appropriately applied to the belt member.

第１の実施の形態に係る画像形成装置を示す模式図。The schematic diagram which shows the image forming apparatus which concerns on 1st Embodiment. ＡＤＦの断面図。Sectional view of ADF. ＡＤＦの裏面側の断面図。Sectional drawing of the back side of ADF. ＡＤＦの駆動モータを示す斜視図。The perspective view which shows the drive motor of ADF. 駆動装置の斜視図。Perspective view of the drive unit. 駆動装置の正面図。Front view of the drive unit. 付勢部材を取り付けていない駆動装置の斜視図。A perspective view of a drive unit to which an urging member is not attached. 駆動装置の模式図。Schematic diagram of the drive unit. 付勢部材の付勢力範囲を図示したグラフ。The graph which illustrated the urging force range of the urging member. θとμの関係式を示したグラフ。The graph which showed the relational expression of θ and μ. 第２の実施の形態に係る駆動装置の模式図。The schematic diagram of the drive device which concerns on 2nd Embodiment. 付勢部材の付勢力範囲を図示したグラフ。The graph which illustrated the urging force range of the urging member. θとμの関係式を示したグラフ。The graph which showed the relational expression of θ and μ. 第３の実施の形態に係る駆動装置の模式図。The schematic diagram of the drive device which concerns on 3rd Embodiment. 先行技術文献における駆動装置の正面図。Front view of the drive device in the prior art document. 先行技術文献における駆動装置の斜視図。Perspective view of the drive device in the prior art document.

以下、本発明の実施の形態について図面を参照して説明する。なお、以下の説明において、シートとは、普通紙の他にも、コート紙等の特殊紙、封筒やインデックス紙等の特殊形状からなる記録材、及びオーバーヘッドプロジェクタ用のプラスチックフィルムや布などを含むものである。また、原稿もシートの一例であり、原稿は、白紙でも、片面又は両面に画像が形成されていてもよいものとする。更に、図面の上下左右方向を装置または各構成要素の上下左右方向として説明に用いることとする。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the sheet includes not only plain paper but also special paper such as coated paper, recording material having a special shape such as envelope and index paper, and plastic film and cloth for overhead projectors. It's a waste. Further, the manuscript is also an example of a sheet, and the manuscript may be a blank sheet or may have an image formed on one side or both sides. Further, the vertical and horizontal directions of the drawings will be used in the description as the vertical and horizontal directions of the device or each component.

＜第１の実施の形態＞
（画像形成装置の概略構成）
図１は第１の実施の形態に係る画像形成装置としての複写機６００の断面概略図である。複写機６００は、画像形成装置本体としてのプリンタ部５００の上方に原稿の画像を読取る画像読取装置２００が設けられて構成されている。画像読取装置２００は、画像読取部３００と、自動原稿給送装置（以下、単にＡＤＦという）４００と、を備えている。 <First Embodiment>
(Rough configuration of image forming apparatus)
FIG. 1 is a schematic cross-sectional view of a copying machine 600 as an image forming apparatus according to the first embodiment. The copying machine 600 is configured by providing an image reading device 200 that reads an image of a document above the printer unit 500 as the main body of the image forming device. The image reading device 200 includes an image reading unit 300 and an automatic document feeding device (hereinafter, simply referred to as ADF) 400.

プリンタ部５００は、その内部に、シートを搬送するシート搬送部５０５と、シート搬送部５０５から搬送されたシートに対して画像の形成を行う電子写真方式の画像形成部５０２と、を備えている。また、画像形成部５０２にて転写された未定着トナー像を加熱及び加圧してシートに対して定着させる定着部５０３と、プリンタ部５００を制御するプリンタ制御部５０４と、を備えている。 The printer unit 500 includes a sheet transport unit 505 that transports sheets and an electrophotographic image forming unit 502 that forms an image on the sheet transported from the sheet transport unit 505. .. Further, it includes a fixing unit 503 that heats and pressurizes the unfixed toner image transferred by the image forming unit 502 to fix it to the sheet, and a printer control unit 504 that controls the printer unit 500.

画像読取部３００は、原稿を載置するための原稿載置手段としての原稿載置台３０１と、この原稿載置台３０１の内側に設けられ、原稿載置台３０１に載置された原稿の画像を読取る画像読取手段３０２と、を備えている。また、画像読取部３００を制御する制御手段としての画像読取装置制御部３０３を備えている。 The image reading unit 300 is provided inside the document mounting table 301 as a document loading means for mounting the document and the document loading table 301, and reads the image of the document mounted on the document loading table 301. The image reading means 302 is provided. Further, the image reading device control unit 303 is provided as a control means for controlling the image reading unit 300.

上記複写機６００を使用して原稿のコピーを取る場合、まず、原稿載置台３０１上に原稿が載置され、ユーザーによってコピーボタン（不図示）が押圧される。そして、このコピーボタンが操作されると、上述した画像読取手段３０２が副走査方向Ｘ（本実施の形態では幅方向）に移動しながら、原稿の画像を読取る。画像読取手段３０２によって読み取られた画像情報は、画像読取装置制御部３０３を介してプリンタ制御部５０４へと通信され、この画像情報に基づいて画像形成部５０２においてトナー像が形成される。そして、このトナー像がシート搬送部５０５から搬送されて来たシートに対して転写され、シートに転写された未定着トナー像が定着部５０３において加熱及び加圧されることによって、シートに対して定着される。定着部５０３によって画像が定着されたシートは機外へと排出され、これにより原稿のコピーが完了する。 When making a copy of a document using the copier 600, first, the document is placed on the document placing table 301, and a copy button (not shown) is pressed by the user. Then, when the copy button is operated, the image reading means 302 described above reads the image of the original while moving in the sub-scanning direction X (the width direction in the present embodiment). The image information read by the image reading means 302 is communicated to the printer control unit 504 via the image reading device control unit 303, and a toner image is formed in the image forming unit 502 based on this image information. Then, this toner image is transferred to the sheet transported from the sheet transport unit 505, and the unfixed toner image transferred to the sheet is heated and pressurized in the fixing unit 503 to the sheet. Be fixed. The sheet on which the image is fixed by the fixing unit 503 is ejected to the outside of the machine, whereby copying of the original is completed.

また、複数枚の原稿のコピーが取られる場合には、ＡＤＦ４００によって原稿が一枚ずつ搬送され、この搬送されている原稿の画像が所定の読取位置に位置している画像読取手段３０２によって読み取られる。なお、原稿載置台３０１に載置された原稿の画像を画像読取手段３０２が副走査方向に移動しながら読取る方式を固定読みというのに対して、停止した画像読取手段３０２がＡＤＦ４００によって搬送されている原稿の画像を読取る方式を流し読みという。 When a plurality of originals are copied, the ADF400 conveys the originals one by one, and the image of the conveyed originals is read by the image reading means 302 located at a predetermined reading position. .. The method of reading the image of the document placed on the document mounting table 301 while the image reading means 302 moves in the sub-scanning direction is called fixed reading, whereas the stopped image reading means 302 is conveyed by the ADF 400. The method of scanning the image of the original document is called scanning.

（ＡＤＦの概略構成）
ついで、ＡＤＦ４００の概略構成について図２乃至４に基づいて説明をする。図２に示すように、ＡＤＦ４００は、原稿を載置する原稿載置トレイ４０１を備えている。原稿載置トレイ４０１上の原稿は、ＡＤＦ４００を用いて流し読みが行われる場合、ピックアップローラ（給送ローラ）４０２により給送され、分離ローラ対４０３の分離ニップ部に送り込まれる。 (Outline configuration of ADF)
Next, the schematic configuration of the ADF 400 will be described with reference to FIGS. 2 to 4. As shown in FIG. 2, the ADF 400 includes a document placing tray 401 on which a document is placed. When scanning is performed using the ADF400, the document on the document loading tray 401 is fed by the pickup roller (feeding roller) 402 and fed to the separation nip portion of the separation roller pair 403.

分離ローラ対４０３は、搬送ローラ４０３ａと分離ローラ４０３ｂとによって形成されている。分離ローラ４０３ｂには、搬送ローラ４０３ａによって搬送されるシートの搬送方向とは逆方向にシートを搬送する方向に分離ローラ４０３ｂを回転させる駆動力がトルクリミッタを介して入力されている。分離ローラ４０３ｂは、ピックアップローラ４０２から一枚ずつ原稿が送り込まれた場合には、搬送ローラに従動回転する。また、原稿が重送された場合には、トルクリミッタを介して駆動力が分離ローラ４０３ｂに伝達され、分離ローラ４０３ｂによって重送した原稿が押し戻される。これにより、一枚ずつ分離して原稿が搬送される。 The separation roller pair 403 is formed by the transfer roller 403a and the separation roller 403b. A driving force for rotating the separation roller 403b in a direction opposite to the transfer direction of the sheet conveyed by the transfer roller 403a is input to the separation roller 403b via a torque limiter. The separation roller 403b is driven to rotate when the originals are fed one by one from the pickup roller 402. When the original is double-fed, the driving force is transmitted to the separation roller 403b via the torque limiter, and the double-fed document is pushed back by the separation roller 403b. As a result, the documents are separated one by one and conveyed.

分離ローラ対４０３によって搬送されたローラは、第１引き抜きローラ対４０４及び第２引き抜きローラ対４０５によって流し読みガラス４０６に向かって原稿搬送路上を搬送される。そして、流し読みガラス４０６上を原稿が通過することにより、原稿の第１面の画像が画像読取手段３０２によって読み取られる。 The rollers conveyed by the separation roller pair 403 are conveyed on the document transfer path toward the scanning glass 406 by the first extraction roller pair 404 and the second extraction roller pair 405. Then, as the document passes over the scanning glass 406, the image on the first surface of the document is read by the image reading means 302.

また、流し読みガラス４０６の下流側には、第２画像読取手段４０７が設けられており、原稿の両面の画像を読取る場合、第２画像読取手段４０７によって原稿の第２面の画像が読み取られ、原稿排出トレイに原稿が排出される。なお、本実施の形態のＡＤＦ４００のようにＡＤＦ４００単体で画像を読取る読取手段を有している場合、ＡＤＦ４００単体でも画像読取装置を構成している。 Further, a second image reading means 407 is provided on the downstream side of the scanning glass 406, and when reading images on both sides of the original, the second image reading means 407 reads the image on the second side of the original. , The original is ejected to the original eject tray. When the ADF400 alone has a reading means for reading an image like the ADF400 of the present embodiment, the ADF400 alone also constitutes an image reading device.

（駆動装置）
ところで、上述したピックアップローラ４０２、搬送ローラ４０３ａ、分離ローラ４０３ｂ、第１引き抜き駆動ローラ４０４ｂ、第２引き抜き駆動ローラ４０５ｂは、図３及び図４に示すモータ１によって駆動されている。このモータ１は、ＡＤＦ４００奥側の側面に取り付けられており、ベルト伝動式の駆動装置１００を構成している。以下、この駆動装置１００の構成について、詳しく説明をする。 (Drive)
By the way, the pickup roller 402, the transport roller 403a, the separation roller 403b, the first pull-out drive roller 404b, and the second pull-out drive roller 405b described above are driven by the motor 1 shown in FIGS. 3 and 4. This motor 1 is attached to the side surface on the back side of the ADF 400, and constitutes a belt transmission type drive device 100. Hereinafter, the configuration of the drive device 100 will be described in detail.

図５に示すように、ベルト伝動式の駆動装置である駆動装置１００は、モータ１を備えた駆動部１１０と、駆動部１１０を支持する本体部１２０と、ベルト部材としてのタイミングベルト４と、を備えている。また、駆動部１１０は、モータ１の他にもモータ支持部材２と、モータ１の回転軸としてのモータ軸１ａに設けられた駆動プーリ１１と、を備えており、モータ１がモータ支持部材２に対して固定され一体化されている。 As shown in FIG. 5, the drive device 100, which is a belt transmission type drive device, includes a drive unit 110 including a motor 1, a main body 120 that supports the drive unit 110, and a timing belt 4 as a belt member. It has. Further, the drive unit 110 includes a motor support member 2 in addition to the motor 1 and a drive pulley 11 provided on the motor shaft 1a as a rotation shaft of the motor 1, and the motor 1 is the motor support member 2. It is fixed and integrated with respect to.

また、本体部１２０は、上記モータ支持部材２が取り付けられる取付部としての駆動部支持部材３と、被駆動プーリ６が固定されている駆動軸８と、を備えている。タイミングベルト４は、モータ軸１ａに設けられた駆動プーリ１１と、駆動軸８に設けられた被駆動プーリ６と、の間で巻回されている。このため、モータ１によって駆動プーリ１１が回転駆動されると、タイミングベルト４を介して被駆動プーリ６に動力が伝達されて駆動軸８が回転する。 Further, the main body 120 includes a drive portion support member 3 as an attachment portion to which the motor support member 2 is attached, and a drive shaft 8 to which the driven pulley 6 is fixed. The timing belt 4 is wound between a drive pulley 11 provided on the motor shaft 1a and a driven pulley 6 provided on the drive shaft 8. Therefore, when the drive pulley 11 is rotationally driven by the motor 1, power is transmitted to the driven pulley 6 via the timing belt 4 to rotate the drive shaft 8.

ついで、駆動部１１０の本体部１２０に対する取り付け構成について説明をする。上述したように、駆動部１１０は、モータ支持部材２が駆動部支持部材３に対して複数箇所（本実施の形態では３箇所）にて連結されている。具体的には、図５及び図６に示すように、駆動部支持部材３には被締結穴３２が複数、設けられている。また、モータ支持部材２には、上記被締結穴３２と対応した位置に被締結穴２２が設けられている。 Next, the mounting configuration of the drive unit 110 with respect to the main body 120 will be described. As described above, in the drive unit 110, the motor support member 2 is connected to the drive unit support member 3 at a plurality of locations (three locations in the present embodiment). Specifically, as shown in FIGS. 5 and 6, the drive unit support member 3 is provided with a plurality of holes 32 to be fastened. Further, the motor support member 2 is provided with a hole 22 to be fastened at a position corresponding to the hole 32 to be fastened.

被締結穴２２は、被締結穴３２よりも大きな長穴となっている。駆動部１１０は、締結部材７がモータ支持部材２の被締結穴２２とは遊嵌し、駆動部支持部材３の被締結穴３２と嵌合もしくは螺合することによって本体部１２０に取り付けられている。また、締結部材７が嵌挿される被締結穴２２は重力方向に延設された長穴である。このため、駆動部１１０は、上記締結部材７によって複数箇所においてモータ支持部材２と駆動部支持部材３とが完全に締結される前であれば、上記長穴の範囲内で、本体部１２０に対して重力方向に移動することができるようになっている。 The to be fastened hole 22 is a long hole larger than the to be fastened hole 32. The drive unit 110 is attached to the main body 120 by loosely fitting the fastening member 7 with the fastened hole 22 of the motor support member 2 and fitting or screwing the fastening member 7 with the fastened hole 32 of the drive unit support member 3. There is. Further, the hole to be fastened 22 into which the fastening member 7 is inserted is an elongated hole extending in the direction of gravity. Therefore, the drive unit 110 can be attached to the main body 120 within the range of the elongated hole before the motor support member 2 and the drive unit support member 3 are completely fastened at a plurality of locations by the fastening member 7. On the other hand, it can move in the direction of gravity.

このため、駆動部１１０の重力方向位置は、駆動部１１０の自重と、連結部材としてのタイミングベルト４と、詳しくは後述する付勢部材５と、により自然に決まる。この際、タイミングベルト４には、駆動部１１０の自重が作用するため、この駆動部１１０の自重によりタイミングベルト４にベルトテンションが付与される。この状態で締結部材７が締め付けられることによって、モータ支持部材２と駆動部支持部材３とが締結され、タイミングベルト４に適切なベルトテンションが付与された状態で、駆動部１１０が本体部１２０に取り付けられる。なお、モータ支持部材２と駆動部支持部材３とが締結部材７によって締結された状態では、駆動部１１０は本体部１２０に対して重力方向に移動不能となる。また、タイミングベルト４が連結部材として作用するため、上記締結部材７による締結を行わないことも可能である。しかしながら、本実施の形態では、駆動装置１００に対して外部から衝撃が加わる可能性を考慮して、締結部材７にて駆動部１１０と本体部１２０を締結している。 Therefore, the position of the drive unit 110 in the gravitational direction is naturally determined by the weight of the drive unit 110, the timing belt 4 as a connecting member, and the urging member 5, which will be described in detail later. At this time, since the weight of the drive unit 110 acts on the timing belt 4, belt tension is applied to the timing belt 4 by the weight of the drive unit 110. By tightening the fastening member 7 in this state, the motor support member 2 and the drive unit support member 3 are fastened, and the drive unit 110 is attached to the main body 120 in a state where an appropriate belt tension is applied to the timing belt 4. It is attached. In the state where the motor support member 2 and the drive unit support member 3 are fastened by the fastening member 7, the drive unit 110 cannot move in the direction of gravity with respect to the main body unit 120. Further, since the timing belt 4 acts as a connecting member, it is possible not to fasten the fastening member 7. However, in the present embodiment, the drive unit 110 and the main body 120 are fastened by the fastening member 7 in consideration of the possibility that an impact is applied to the drive device 100 from the outside.

ついで、駆動部１１０の重心の偏りによる傾ぎについて説明をする。図７は付勢部材５及び締結部材７を取り付けていない状態の駆動装置１００を示す斜視図である。駆動プーリ１１よりもモータ１の方が重いため、駆動部１１０の重心は、モータ支持部材２と駆動部支持部材３の接触位置より駆動部側に偏っている。 Next, the inclination of the drive unit 110 due to the bias of the center of gravity will be described. FIG. 7 is a perspective view showing a drive device 100 in a state where the urging member 5 and the fastening member 7 are not attached. Since the motor 1 is heavier than the drive pulley 11, the center of gravity of the drive unit 110 is biased toward the drive unit from the contact position between the motor support member 2 and the drive unit support member 3.

このため、図７のように、付勢部材５が無い状態で駆動部１１０を本体部１２０に取り付けようとすると、駆動部１１０は自重による回転モーメントで図中Ａ方向に回転し、駆動部支持部材３から離間しようとする。駆動部１１０が傾くと、モータ軸１ａごと駆動プーリ１１が傾くため、タイミングベルト４に正常なテンション（張力）が掛からなくなる。また、締結部材７によってモータ支持部材２と駆動部支持部材３とが締結されていた場合、上記傾ぎは小さくなるが、その分、モータ支持部材２と駆動部支持部材３との締結箇所（接触箇所）に大きな負荷が掛かってしまう。 Therefore, as shown in FIG. 7, when the drive unit 110 is attached to the main body 120 without the urging member 5, the drive unit 110 rotates in the A direction in the drawing due to the rotational moment due to its own weight to support the drive unit. Attempts to separate from member 3. When the drive unit 110 is tilted, the drive pulley 11 is tilted together with the motor shaft 1a, so that normal tension is not applied to the timing belt 4. Further, when the motor support member 2 and the drive portion support member 3 are fastened by the fastening member 7, the inclination becomes smaller, but the fastening portion between the motor support member 2 and the drive portion support member 3 ( A large load is applied to the contact point).

そこで、本実施の形態では、モータ支持部材２の上部に被付勢部２１を設け、また、駆動部支持部材３の上部に被付勢部３１を設けている。そして、これら被付勢部２１，３１を、弾性体（本実施の形態ではスプリング）である付勢部材５によって連結し、これにより、モータ支持部材２と駆動部支持部材３との接触状態を保持している。 Therefore, in the present embodiment, the urged portion 21 is provided on the upper portion of the motor support member 2, and the urged portion 31 is provided on the upper portion of the drive portion support member 3. Then, these urged portions 21 and 31 are connected by an urging member 5 which is an elastic body (spring in the present embodiment), whereby the contact state between the motor support member 2 and the drive portion support member 3 is maintained. keeping.

即ち、付勢部材５の一端部が上記被付勢部２１に取り付けられ、他端部が上記被付勢部３１に取り付けられており、この付勢部材５の付勢力によって、駆動部１１０がモータ軸方向において本体部１２０側に付勢されている。別の言い方をすれば、上記付勢部材５は、モータ１の回転軸方向において駆動部１１０が本体部１２０に近づくように付勢する付勢部材と言える。また、上記駆動部１１０の被付勢部２１は、付勢部材５の第１端部が係合する第１係合部と言え、本体部１２０の被付勢部３１は、付勢部材５の第２端部が係合する第２係合部と言うことができる。なお、付勢部材５の駆動部１１０及び本体部１２０への取付箇所である被付勢部２１，３１は、いずれもモータ１の重心位置Ｇ（図８参照）よりも上方に位置している。 That is, one end of the urging member 5 is attached to the urged portion 21, and the other end is attached to the urged portion 31, and the urging force of the urging member 5 causes the drive unit 110 to move. It is urged toward the main body 120 in the motor axial direction. In other words, the urging member 5 can be said to be an urging member that urges the drive unit 110 to approach the main body 120 in the rotation axis direction of the motor 1. Further, the urged portion 21 of the drive unit 110 can be said to be the first engaging portion with which the first end portion of the urging member 5 is engaged, and the urged portion 31 of the main body portion 120 is the urging member 5. It can be said that it is a second engaging portion with which the second end portion of the above is engaged. The urged portions 21 and 31, which are the attachment points of the urging member 5 to the driving portion 110 and the main body portion 120, are both located above the center of gravity position G (see FIG. 8) of the motor 1. ..

ついで、駆動部１１０が本体部１２０から離間せず静止するための付勢部材５の条件について説明をする。図８は駆動部１１０を詳細化した模式図（側面図）である。駆動部１１０が本体部１２０と接触し、静止状態となる条件であるため、駆動部１１０が本体部１２０から受ける抗力Ｎは０以上となる。 Next, the conditions of the urging member 5 for the drive unit 110 to stand still without being separated from the main body 120 will be described. FIG. 8 is a schematic view (side view) of the drive unit 110 in detail. Since the condition is that the drive unit 110 comes into contact with the main body 120 and is in a stationary state, the drag force N that the drive unit 110 receives from the main body 120 is 0 or more.

Figure 2021087156
Figure 2021087156

また、モータ１にかかる重力をＦ、駆動プーリ１１がタイミングベルト４に引っ張られる力をＦＴ、駆動部１１０が付勢部材５に引っ張られる力の大きさをｆとする。更に、力の向きをθ、駆動部が本体部から受ける摩擦力をＦｍとして、水平方向の力のつり合いの式を求めると、以下の式（２）のようになる。 Further, the gravity applied to the motor 1 F, the force driving pulley 11 is pulled to the timing belt 4 F T, the magnitude of the force which the drive unit 110 is pulled to the biasing member 5 and f. Further, when the direction of the force is θ and the frictional force received by the drive unit from the main body is F m , the equation for the balance of the force in the horizontal direction is obtained as the following equation (2).

Figure 2021087156
同様に鉛直方向のつり合いの式を求めると、以下の式（３）のようになる。
Figure 2021087156
 Similarly, when the equation for the vertical balance is obtained, it becomes the following equation (3).

Figure 2021087156
Figure 2021087156

また、静止摩擦係数をμとすると、摩擦力Ｆｍは以下の式（４）の関係を満たす。 Further, assuming that the coefficient of static friction is μ, the frictional force Fm satisfies the relationship of the following equation (4).

Figure 2021087156
Figure 2021087156

更に、駆動部１１０と本体部１２０の接触位置からＦＴがかかる位置までの水平方向距離をＬＴ、駆動部１１０と本体部１２０の接触位置から駆動部１１０の重心Ｇまでの水平方向距離をＬＦとする。また、駆動部１１０と本体部１２０の接触位置からｆがかかる位置までのｆの法線方向距離をＬｆとして、点Ｐ周りのモーメントのつり合いの式を求めると、以下の式（５）のようになる。 Furthermore, the horizontal distance from the contact position of the drive unit 110 and the main body portion 120 to the position it takes F T L T, the horizontal distance from the contact position of the drive unit 110 and the main body portion 120 to the center of gravity G of the drive unit 110 Let it be LF . Further, when the equation for the balance of the moment around the point P is obtained, where the distance in the normal direction of f from the contact position between the drive unit 110 and the main body 120 to the position where f is applied is L f, the following equation (5) is obtained. Will be.

Figure 2021087156
Figure 2021087156

ここで式（１），（２）よりθは、以下の式（６）の条件を満たす。 Here, from the equations (1) and (2), θ satisfies the condition of the following equation (6).

Figure 2021087156
Figure 2021087156

更に、式（２），（３），（４）より、式（７）が求められる。 Further, the equation (7) can be obtained from the equations (2), (3) and (4).

Figure 2021087156
Figure 2021087156

よって式（６），（７）からｆの取りうる値は図９のグラフの網掛け部となる（μ=０.３）。 Therefore, the possible values of f from equations (6) and (7) are shaded parts of the graph of FIG. 9 (μ = 0.3).

また、式（５）より、式（８）が求められる。 Further, the equation (8) can be obtained from the equation (5).

Figure 2021087156
Figure 2021087156

よってｆが決まるとＬｆは一義的に決まる。以上から、これらｆ及びＬｆを選定し、任意の系で駆動部１１０が本体部１２０から離間せずに静止するための付勢部材５を決定することができる。 Therefore, when f is determined, L f is uniquely determined. From the above, these f and L f can be selected, and the urging member 5 for allowing the drive unit 110 to stand still without being separated from the main body unit 120 in an arbitrary system can be determined.

ここで付勢部材５は本実施の形態では付勢部材としてスプリングが用いられており、図９からｆが最小となるスプリングを選ぶことができる。また一般的にスプリングの張力は部品の出来によって±１０％の公差域を持っている。このことからｆが最小となるスプリングを選ぶことがバラツキ最小のスプリングを選ぶこととなり、精度の高い装置を作ることができる。またｆが最小となる場合、駆動部と本体部にスプリングをかける際により少ない負荷で作業することができ、組立性の改善につながる。 Here, as the urging member 5, a spring is used as the urging member in the present embodiment, and a spring having the minimum f can be selected from FIG. In general, the tension of the spring has a tolerance range of ± 10% depending on the finished parts. From this, selecting the spring with the minimum f will select the spring with the minimum variation, and a highly accurate device can be manufactured. Further, when f is the minimum, it is possible to work with a smaller load when applying a spring to the drive unit and the main body unit, which leads to improvement in assemblability.

図１０はｆが最小となるθとμの関係を図示したグラフである。式（７）より最小のｆの値であるｆｍｉｎは以下の式（９）のようになる。 FIG. 10 is a graph illustrating the relationship between θ and μ in which f is the minimum. The f min, which is the smallest value of f from the equation (7), is as shown in the following equation (9).

Figure 2021087156
Figure 2021087156

よってｆが最小となるθとμの関係が一対一対応で決まる。即ちμが決まると、自動的にｆを最小にするθが求まる。 Therefore, the relationship between θ and μ, which minimizes f, is determined by a one-to-one correspondence. That is, when μ is determined, θ that minimizes f is automatically obtained.

上述したように、本実施の形態においては、本体部１２０によって駆動部１１０を重力方向に移動可能に支持し、駆動部１１０の自重を用いてタイミングベルト４にテンションを設定している。そして、タイミングベルト４にテンションを設定する際には、これら駆動部１１０と本体部１２０との間に付勢部材５を介在させ、この付勢部材５によって、本体部１２０に向かうモータ１の回転軸１ａ方向成分を有する付勢力を、駆動部１１０に付与している。このため、上記付勢部材５の付勢力により、重心Ｇの偏りによる駆動部１１０の傾きを抑制することができる。また、これにより、駆動プーリ１１が傾ぐことを抑制することができ、駆動部１１０の自重により適正なベルトテンションをタイミングベルト４に付与することができる。 As described above, in the present embodiment, the drive unit 110 is movably supported by the main body unit 120 in the direction of gravity, and the timing belt 4 is set with tension by using the weight of the drive unit 110 itself. Then, when setting the tension on the timing belt 4, an urging member 5 is interposed between the drive unit 110 and the main body 120, and the urging member 5 rotates the motor 1 toward the main body 120. An urging force having a component in the direction of the shaft 1a is applied to the drive unit 110. Therefore, the urging force of the urging member 5 can suppress the inclination of the drive unit 110 due to the bias of the center of gravity G. Further, this makes it possible to prevent the drive pulley 11 from tilting, and it is possible to apply an appropriate belt tension to the timing belt 4 by the weight of the drive unit 110 itself.

更に、付勢部材５の付勢力によって自重によって駆動部１１０に生じるモーメントを打ち消す方向に力がかかるため、駆動部１１０及び本体部１２０の締結箇所に掛かる負荷を低減することが可能となる。加えて、上述した実施の形態では、付勢部材５が駆動部１１０に付与する付勢力は、重力方向とは反対向きの成分を有している。このため、所望のベルトテンションを付与するのに必要な重量よりも駆動部１１０の重量が大きい場合であっても、付勢部材５の付勢力により、ベルト部材に掛かるベルトテンションを調整することができる。 Further, since the urging force of the urging member 5 exerts a force in the direction of canceling the moment generated in the drive unit 110 due to its own weight, it is possible to reduce the load applied to the fastening portion of the drive unit 110 and the main body 120. In addition, in the above-described embodiment, the urging force applied to the drive unit 110 by the urging member 5 has a component in the direction opposite to the direction of gravity. Therefore, even when the weight of the drive unit 110 is heavier than the weight required to apply the desired belt tension, the belt tension applied to the belt member can be adjusted by the urging force of the urging member 5. it can.

＜第２の実施の形態＞
ついで、第２の実施の形態について説明をする。第１の実施の形態では、モータ１は大きなモータを想定しており、自重をそのままタイミングベルト４にかけると、テンションがかかりすぎるため付勢部材５で抑制していた。ただしタイミングベルト４が硬度の高い部材である場合、モータ１の自重をかけてもベルトテンションが不十分となり、付勢部材５でテンションを増加させる必要がある場合がある。図１１は付勢部材５によりタイミングベルト４にかかるテンションを促成する場合の駆動部１１０を詳細化した模式図（側面図）である。付勢部材５が駆動部１１０に付与する付勢力が重力方向の成分を有する場合において、第１の実施の形態と同様に駆動部１１０が本体部１２０から離間せず静止する条件を以下において導く。 <Second embodiment>
Next, the second embodiment will be described. In the first embodiment, the motor 1 is assumed to be a large motor, and if the weight of the motor 1 is applied to the timing belt 4 as it is, too much tension is applied, so that the motor 1 is suppressed by the urging member 5. However, when the timing belt 4 is a member having high hardness, the belt tension may be insufficient even if the weight of the motor 1 is applied, and it may be necessary to increase the tension by the urging member 5. FIG. 11 is a schematic view (side view) detailing the drive unit 110 when the tension applied to the timing belt 4 is urged by the urging member 5. When the urging force applied to the drive unit 110 by the urging member 5 has a component in the direction of gravity, the condition that the drive unit 110 is stationary without being separated from the main body 120 is derived below as in the first embodiment. ..

駆動部１１０は本体部１２０と接触し、静止状態にあるため、Ｎは以下の式（１０）の関係を満たす。 Since the drive unit 110 is in contact with the main body 120 and is in a stationary state, N satisfies the relationship of the following equation (10).

Figure 2021087156
Figure 2021087156

また、水平方向の力のつり合いより式（１１）が求まる。 Further, the equation (11) can be obtained from the balance of the forces in the horizontal direction.

Figure 2021087156
Figure 2021087156

更に、鉛直方向のつり合いより式（１２）が求まる。 Further, the equation (12) can be obtained from the equilibrium in the vertical direction.

Figure 2021087156
Figure 2021087156

また、静止摩擦係数をμとすると、摩擦力Ｆｍは以下の式（１３）の関係を満たす。 Further, assuming that the coefficient of static friction is μ, the frictional force Fm satisfies the relationship of the following equation (13).

Figure 2021087156
Figure 2021087156

更に、点Ｐ周りのモーメントのつり合いの式を求めると、以下の式（１４）のようになる。 Further, when the equation of the balance of the moment around the point P is obtained, it becomes the following equation (14).

Figure 2021087156
Figure 2021087156

ここで式（１０），（１１）よりθは、以下の式（１５）の条件を満たす。 Here, from equations (10) and (11), θ satisfies the condition of the following equation (15).

Figure 2021087156
Figure 2021087156

更に、式（１１），（１２），（１３）より、式（１６）が求められる。 Further, the equation (16) is obtained from the equations (11), (12), and (13).

Figure 2021087156
Figure 2021087156

よって式（１５）、（１６）からｆの取りうる値は図１２のグラフの網掛け部となる（μ=０.３）。 Therefore, the values that f can take from the equations (15) and (16) are shaded parts of the graph of FIG. 12 (μ = 0.3).

また、式（１４）より、式（１７）が求められる。 Further, the equation (17) is obtained from the equation (14).

Figure 2021087156
Figure 2021087156

よって任意の系で駆動部が本体部から離間せずに静止するための付勢部材５を決定することができる（ｆとＬｆを決める）。 Therefore, it is possible to determine the urging member 5 (determines f and L f ) for the drive unit to stand still without being separated from the main body in any system.

また第１の実施の形態と同様に、ｆの最小値が求まり、駆動部と本体部にスプリングをかける際により少ない負荷で作業することができ、組立性の改善につながる。 Further, as in the first embodiment, the minimum value of f can be obtained, and when the spring is applied to the drive unit and the main body, the work can be performed with a smaller load, which leads to improvement in assemblability.

図１３はｆが最小となるθとμの関係を図示したグラフである。式（１６）より最小のｆの値であるｆｍｉｎは以下の式（１８）のようになる。 FIG. 13 is a graph illustrating the relationship between θ and μ in which f is the minimum. The f min, which is the smallest value of f from the equation (16), is as shown in the following equation (18).

Figure 2021087156
Figure 2021087156

よってｆが最小となるθとμが一対一対応で決まる。即ちμが決まると、自動的にｆを最小にするθが求まる。 Therefore, θ and μ, which minimize f, are determined by a one-to-one correspondence. That is, when μ is determined, θ that minimizes f is automatically obtained.

＜第３の実施の形態＞
第１の実施の形態においてモータ支持部材２と駆動部支持部材３の締結箇所は同一平面上にあるが、複数の締結箇所が異なる平面にあってもよい。即ち。第１の実施の形態では、モータ支持部材２は駆動部支持部材３に対して、重力方向に移動可能に複数箇所で締結されており、これら複数の締結箇所は、対向配置される同一のモータ支持部材２及び駆動部支持部材３の面同士を締結させていた。 <Third embodiment>
In the first embodiment, the fastening points of the motor support member 2 and the drive unit support member 3 are on the same plane, but a plurality of fastening points may be on different planes. That is. In the first embodiment, the motor support member 2 is fastened to the drive unit support member 3 at a plurality of points so as to be movable in the direction of gravity, and the plurality of fastened points are the same motor arranged to face each other. The surfaces of the support member 2 and the drive unit support member 3 were fastened to each other.

一方で、本実施の形態では、複数の締結箇所のうちの少なくとも１つは、対向配置されたモータ支持部材２と駆動部支持部材３との面のうち、他の締結箇所が締結させる対向面同士とは、モータ１の回転軸１ａ方向において異なる位置で対向した面同士を締結させている。この場合における、第１の実施の形態と同様に駆動部１１０が本体部１２０から離間せず静止する条件を以下において導く。 On the other hand, in the present embodiment, at least one of the plurality of fastening points is a facing surface to which the other fastening points are fastened among the surfaces of the motor support member 2 and the drive unit support member 3 arranged to face each other. The surfaces facing each other at different positions in the direction of the rotation shaft 1a of the motor 1 are fastened to each other. In this case, the condition that the drive unit 110 is stationary without being separated from the main body unit 120 is derived below as in the first embodiment.

駆動部１１０は本体部１２０と接触し、静止状態にあるため、Ｎは以下の式（１９）の関係を満たす。 Since the drive unit 110 is in contact with the main body 120 and is in a stationary state, N satisfies the relationship of the following equation (19).

Figure 2021087156
Figure 2021087156

モータ１にかかる重力をＦ、駆動プーリ１１が連結部材４に引っ張られる力をＦＴ、駆動部が付勢部材５に引っ張られる力の大きさをｆとする。更に、力の向きをθ、駆動部が本体部から受ける摩擦力をＦｍとして、水平方向の力のつり合いの式を求めると、以下の式（２０）のようになる。 The gravity applied to the motor 1 F, and the forces driving pulley 11 is pulled to the connecting member 4 F T, the magnitude of the force driving portion is pulled in the biasing member 5 f. Further, when the direction of the force is θ and the frictional force received by the drive unit from the main body is F m , the equation for balancing the force in the horizontal direction is obtained as the following equation (20).

Figure 2021087156
Figure 2021087156

同様に鉛直方向のつり合いの式を求めると、以下の式（２１）のようになる。 Similarly, when the equation for the equilibrium in the vertical direction is obtained, it becomes the following equation (21).

Figure 2021087156
Figure 2021087156

また、静止摩擦係数をμとすると、摩擦力Ｆｍは以下の式（２２）の関係を満たす。 Also, when the static friction coefficient is mu, frictional force F m satisfy the relation of the following equation (22).

Figure 2021087156
Figure 2021087156

更に、駆動部１１０と本体部１２０の接触位置からＦＴがかかる位置までの水平方向距離をＬＴ、駆動部１１０と本体部１２０の接触位置から駆動部１１０の重心までの水平方向距離をＬＦとする。また、駆動部１１０と本体部１２０の接触位置からｆがかかる位置までのｆの法線方向距離をＬｆとして、点Ｐ周りのモーメントのつり合いの式を求めると、以下の式（２３）のようになる。 Furthermore, the horizontal distance from the contact position of the drive unit 110 and the main body portion 120 to the position it takes F T L T, the horizontal distance from the contact position of the drive unit 110 and the main body portion 120 to the center of gravity of the drive unit 110 L Let it be F. Further, when the equation for the balance of the moment around the point P is obtained, where the distance in the normal direction of f from the contact position between the drive unit 110 and the main body 120 to the position where f is applied is L f, the following equation (23) is obtained. Will be.

Figure 2021087156
Figure 2021087156

ここで、式（１９），（２０）より、θは、以下の式（２４）の条件を満たす。 Here, from the equations (19) and (20), θ satisfies the condition of the following equation (24).

Figure 2021087156
Figure 2021087156

更に、式（２０），（２１），（２２）より、式（２５）が求められる。 Further, the equation (25) can be obtained from the equations (20), (21) and (22).

Figure 2021087156
Figure 2021087156

よって、式（２４）及び式（２５）からｆの取りうる値は図９のグラフの網掛け部となる（μ=０.３）。また、式（２３）より式（２６）が求められる。 Therefore, the values that f can take from Eqs. (24) and (25) are shaded parts of the graph of FIG. 9 (μ = 0.3). Further, the equation (26) is obtained from the equation (23).

Figure 2021087156
Figure 2021087156

よってｆが決まるとＬｆは一義的に決まる。以上から、任意の系で駆動部が本体部から離間せずに静止するための付勢部材５を決定することができる（ｆとＬｆを決める）。 Therefore, when f is determined, L f is uniquely determined. From the above, it is possible to determine the urging member 5 (determines f and L f ) for the drive unit to stand still without being separated from the main body in any system.

ここで付勢部材５は本実施の形態ではスプリングが用いられており、図９からｆが最小となるスプリングを選ぶことができる。また一般的にスプリングの張力は部品の出来によって±１０％の公差域を持っている。このことからｆが最小となるスプリングを選ぶことがバラツキ最小のスプリングを選ぶこととなり、精度の高い装置を作ることができる。またｆが最小となる場合、駆動部１１０と本体部１２０にスプリングをかける際により少ない負荷で作業することができ、組立性の改善につながる。 Here, a spring is used as the urging member 5 in the present embodiment, and a spring having the minimum f can be selected from FIG. In general, the tension of the spring has a tolerance range of ± 10% depending on the finished parts. From this, selecting the spring with the minimum f will select the spring with the minimum variation, and a highly accurate device can be manufactured. Further, when f is the minimum, it is possible to work with a smaller load when applying a spring to the drive unit 110 and the main body 120, which leads to improvement in assemblability.

図１０はｆが最小となるθとμの関係を図示したグラフである。式（２５）より最小のｆの値であるｆｍｉｎは以下の式（２７）のようになる FIG. 10 is a graph illustrating the relationship between θ and μ in which f is the minimum. The minimum value of f from equation (25), f min, is as shown in equation (27) below.

Figure 2021087156
Figure 2021087156

よってｆが最小となるθとμが一対一対応で決まる。即ちμが決まると、自動的にｆを最小にするθが求まる。 Therefore, θ and μ, which minimize f, are determined by a one-to-one correspondence. That is, when μ is determined, θ that minimizes f is automatically obtained.

なお、上述した実施の形態においては、付勢部材としてスプリングを例示したが、これに限る必要はなく、例えば、ゴム等の部材によって形成されても良い。また、締結部材７によって駆動部１１０及び本体部１２０を３箇所で締結したが、３以上の箇所で駆動部１１０と本体部１２０とを締結しても良い。更に、駆動部１１０は、ベルトテンションを付与するために本体部１２０に対して重直方向に移動可能に構成されているが、重力方向成分を有していれば、その移動方向はどのような方向であっても良い。 In the above-described embodiment, the spring is exemplified as the urging member, but the present invention is not limited to this, and the spring may be formed of, for example, a member such as rubber. Further, although the drive unit 110 and the main body 120 are fastened at three places by the fastening member 7, the drive unit 110 and the main body 120 may be fastened at three or more places. Further, the drive unit 110 is configured to be movable in the direction perpendicular to the main body 120 in order to apply belt tension, but if it has a gravity direction component, what kind of movement direction is there? It may be in the direction.

また、本実施の形態に係る駆動装置は、プリンタ、複写機、ＦＡＸ及び複合機などの画像形成装置のみならず、種々の機械に対して適用することができる。 Further, the drive device according to the present embodiment can be applied not only to image forming devices such as printers, copiers, fax machines and multifunction devices, but also to various machines.

１：モータ／４：ベルト部材（タイミングベルト）／５：付勢部材（スプリング）／６：被駆動プーリ／１１：駆動プーリ／１００：駆動装置／１１０：駆動部／１２０：本体部 1: Motor / 4: Belt member (timing belt) / 5: Biasing member (spring) / 6: Driven pulley / 11: Drive pulley / 100: Drive device / 110: Drive unit / 120: Main body unit

Claims (9)

モータと、前記モータによって回転駆動される駆動プーリと、を備えた駆動部と、
被駆動プーリを備えていると共に、前記駆動部を支持する本体部と、
前記駆動プーリ及び被駆動プーリに巻回されたベルト部材と、
前記駆動部と前記本体部との間に介在する付勢部材と、を備え、
前記付勢部材は、前記本体部に向かう前記モータの回転軸方向成分を有する付勢力を、前記駆動部に付与する、
ことを特徴とする駆動装置。 A drive unit including a motor and a drive pulley that is rotationally driven by the motor.
A main body that is equipped with a driven pulley and supports the drive,
The drive pulley, the belt member wound around the driven pulley, and
An urging member interposed between the drive unit and the main body portion is provided.
The urging member applies an urging force having a rotation axis direction component of the motor toward the main body portion to the driving portion.
A drive device characterized by that. 前記付勢部材は、前記駆動部に付与する付勢力が重力方向とは反対向きの成分を有するように設けられている、
ことを特徴とする請求項１に記載の駆動装置。 The urging member is provided so that the urging force applied to the driving unit has a component in the direction opposite to the direction of gravity.
The driving device according to claim 1. 前記付勢部材は、前記駆動部に付与する付勢力が重力方向の成分を有するように設けられている、
ことを特徴とする請求項１に記載の駆動装置。 The urging member is provided so that the urging force applied to the driving unit has a component in the direction of gravity.
The driving device according to claim 1. 前記駆動部と前記本体部とを締結する締結部材を備え、
前記駆動部は、前記モータが固定されるモータ支持部材を備え、
前記本体部は、前記モータ支持部材が前記締結部材を介して締結される取付部を備え、
前記モータ支持部材は、前記締結部材が嵌挿されると共に、重力方向に延設された長穴を有している、
ことを特徴とする請求項１乃至３のいずれか１項に記載の駆動装置。 A fastening member for fastening the drive unit and the main body portion is provided.
The drive unit includes a motor support member to which the motor is fixed.
The main body portion includes a mounting portion to which the motor support member is fastened via the fastening member.
The motor support member has an elongated hole extending in the direction of gravity while the fastening member is fitted and inserted.
The driving device according to any one of claims 1 to 3. 前記締結部材は、前記モータ支持部材を前記取付部に対して複数箇所で締結している複数の締結部材の内の１つであり、
これら複数の締結箇所は、対向配置される同一の前記モータ支持部材及び前記取付部の面同士を締結させている、
ことを特徴とする請求項４に記載の駆動装置。 The fastening member is one of a plurality of fastening members that fasten the motor support member to the mounting portion at a plurality of locations.
These plurality of fastening points fasten the surfaces of the same motor support member and the mounting portion that are arranged so as to face each other.
The driving device according to claim 4. 前記締結部材は、前記モータ支持部材を前記取付部に対して、複数箇所で締結している複数の締結部材の内の１つであり、
これら複数の締結箇所のうちの少なくとも１つは、対向配置された前記モータ支持部材と前記取付部との面のうち、他の締結箇所が締結させる対向面同士とは、前記モータの回転軸方向において異なる位置で対向した面同士を締結させている、
ことを特徴とする請求項４に記載の駆動装置。 The fastening member is one of a plurality of fastening members that fasten the motor support member to the mounting portion at a plurality of locations.
At least one of these plurality of fastening points is the surfaces of the motor support member and the mounting portion arranged to face each other, and the facing surfaces to be fastened by the other fastening points are in the rotation axis direction of the motor. In, the facing surfaces are fastened at different positions.
The driving device according to claim 4. モータと、前記モータによって回転駆動される駆動プーリと、を備えた駆動部と、
被駆動プーリを備えていると共に、前記駆動部を支持する本体部と、
前記駆動プーリ及び被駆動プーリに巻回されたベルト部材と、を備え、
前記駆動部は、前記モータの回転軸方向において前記駆動部が前記本体部に近づくように付勢する付勢部材の第１端部が係合する第１係合部を備え、
前記本体部は、前記付勢部材の第２端部が係合する第２係合部を備えている、
ことを特徴とする駆動装置。 A drive unit including a motor and a drive pulley that is rotationally driven by the motor.
A main body that is equipped with a driven pulley and supports the drive,
The drive pulley and the belt member wound around the driven pulley are provided.
The drive unit includes a first engagement portion in which the first end portion of the urging member that urges the drive unit to approach the main body portion in the rotation axis direction of the motor is engaged.
The main body portion includes a second engaging portion with which the second end portion of the urging member engages.
A drive device characterized by that. 請求項１乃至７のいずれか１項記載の駆動装置と、
前記駆動装置によって駆動されるローラと、
前記ローラによって搬送されたシートに形成されている画像を読取る読取手段と、を備えた、
ことを特徴とする画像読取装置。 The drive device according to any one of claims 1 to 7.
The rollers driven by the drive device and
A reading means for reading an image formed on the sheet conveyed by the roller.
An image reader characterized by this. 請求項８記載の画像読取装置と、
前記画像読取装置によって読み取られた画像をシートに形成される画像形成部と、を備えた、
ことを特徴とする画像形成装置。 The image reading device according to claim 8 and
An image forming unit, which forms an image read by the image reading device on a sheet, is provided.
An image forming apparatus characterized in that.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009164668A (en) * 2007-12-28 2009-07-23 Kyocera Mita Corp Image reader and image forming apparatus provided with the same
JP2019105335A (en) * 2017-12-13 2019-06-27 キヤノン株式会社 Power transmission device and image formation device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009164668A (en) * 2007-12-28 2009-07-23 Kyocera Mita Corp Image reader and image forming apparatus provided with the same
JP2019105335A (en) * 2017-12-13 2019-06-27 キヤノン株式会社 Power transmission device and image formation device

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