JPH10274312A - Drive transmitter, sheet feeder and image forming device - Google Patents
Drive transmitter, sheet feeder and image forming deviceInfo
- Publication number
- JPH10274312A JPH10274312A JP573098A JP573098A JPH10274312A JP H10274312 A JPH10274312 A JP H10274312A JP 573098 A JP573098 A JP 573098A JP 573098 A JP573098 A JP 573098A JP H10274312 A JPH10274312 A JP H10274312A
- Authority
- JP
- Japan
- Prior art keywords
- gear
- tooth
- toothless
- driven gear
- transmission device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Sheets, Magazines, And Separation Thereof (AREA)
- Transmission Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、モータ等の駆動源
からの駆動力を必要に応じて伝達するための駆動伝達装
置及びその駆動伝達装置を用いたシート給送装置に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive transmission device for transmitting a drive force from a drive source such as a motor as required, and a sheet feeding device using the drive transmission device.
【０００２】[0002]
【従来の技術】画像形成装置などに用いらているシート
給送装置では、モータ等の駆動源からの駆動力を受けて
給紙ローラの回転やシートを積載する中板の上下の揺動
を行なっている。この際、駆動力の伝達を所定のタイミ
ングで必要に応じて行なうために、駆動源とシート給送
装置の間の駆動力の伝達経路の途中に駆動力を選択的に
伝達・非伝達するための駆動伝達装置が設けられてい
る。2. Description of the Related Art In a sheet feeding apparatus used in an image forming apparatus or the like, rotation of a sheet feeding roller or vertical swinging of a middle plate for stacking sheets is performed by receiving a driving force from a driving source such as a motor. I do. At this time, in order to selectively transmit / non-transmit the driving force in the middle of the driving force transmission path between the driving source and the sheet feeding device in order to transmit the driving force as required at a predetermined timing. Is provided.
【０００３】この駆動伝達装置として、従来、歯車の歯
の一部を削除した欠歯部を有する欠歯歯車を用いたもの
があった。この欠歯歯車を用いた駆動伝達装置の一例を
図１６に基づいて説明する。[0003] Conventionally, as this drive transmission device, there has been a device using a toothless gear having a toothless portion in which a part of the gear teeth is deleted. An example of a drive transmission device using the toothless gear will be described with reference to FIG.
【０００４】１００は図示しない駆動源からの駆動力を
選択的に伝達するための駆動伝達装置であり、欠歯歯車
１０２と、この欠歯歯車１０２に噛合い可能な駆動歯車
１０４とを有している。Reference numeral 100 denotes a drive transmission device for selectively transmitting a driving force from a drive source (not shown). The drive transmission device 100 includes a toothless gear 102 and a drive gear 104 that can mesh with the toothless gear 102. ing.
【０００５】駆動歯車１０４は駆動源に接続されて常時
回転している。欠歯歯車１０２はコイルスプリング１０
６の弾性力により図中反時計回り方向に回転付勢されて
いる。欠歯歯車１０２の欠歯部１０２ａが駆動歯車１０
４に対向した位置（図に示す状態）でコイルスプリング
１０６の弾性力に抗して欠歯歯車１０２を停止させるた
めのソレノイド１０８が設けられている。このソレノイ
ド１０８が励磁されると、アーム１０８ａが図中の実線
で示す欠歯歯車１０２の係合部１０２ｂと係合する位置
から二点鎖線で示す位置へ移動して係合が解除され、欠
歯歯車１０２がコイルスプリング１０６により回転して
駆動歯車１０４と噛合い、これにより、駆動歯車１０４
から欠歯歯車１０２へ駆動力が伝達される。この欠歯歯
車１０２と駆動歯車１０４との噛合開始時の噛合いを良
好にするために、特開平６−５０４０６号公報で開示さ
れた技術がある。[0005] The drive gear 104 is connected to a drive source and is constantly rotating. The toothless gear 102 is a coil spring 10
6 is urged to rotate counterclockwise in the drawing. The toothless portion 102a of the toothless gear 102 is
A solenoid 108 for stopping the toothless gear 102 against the elastic force of the coil spring 106 is provided at a position (the state shown in the figure) opposite to the position 4. When the solenoid 108 is excited, the arm 108a moves from the position where the arm 108a engages with the engaging portion 102b of the toothless gear 102 shown by the solid line to the position shown by the two-dot chain line and is disengaged. The tooth gear 102 is rotated by the coil spring 106 and meshes with the drive gear 104, whereby the drive gear 104
The driving force is transmitted from the transmission to the toothless gear 102. In order to improve the meshing between the toothless gear 102 and the driving gear 104 at the time of starting the meshing, there is a technique disclosed in Japanese Patent Laid-Open No. 6-50406.
【０００６】これは、図において、欠歯歯車１０２にお
ける駆動歯車１０４と最初に噛合う第一歯に、回転方向
前側の歯面の歯元側から後側の歯面の歯先側に向けて切
り欠いた奇数歯斜面Ｔ１を形成し、第二歯には、前側の
歯面の歯先側から後側の歯面の歯元側に向けて切り欠い
た偶数歯斜面Ｔ２を形成したものである。[0006] In the figure, the first tooth that first meshes with the drive gear 104 of the toothless gear 102 is moved from the root of the front tooth surface in the rotational direction to the tip of the rear tooth surface in the rotation direction. A notched odd-numbered tooth slope T1 is formed, and the second tooth is formed with an even-numbered tooth slope T2 notched from the tip of the front tooth surface toward the root of the rear tooth surface. is there.
【０００７】この構成により、駆動歯車１０４から欠歯
歯車１０２に駆動力を伝達するために、欠歯歯車１０２
がコイルスプリング１０６により回転して駆動歯車１０
４と噛合う際に、各歯車の歯先同士が同期してしまった
場合（歯先同志が接触した場合）には、駆動歯車１０４
の歯が欠歯歯車１０２の第一歯の奇数歯斜面Ｔ１または
第二歯の斜面Ｔ２に当接することによって、欠歯歯車１
０２の回転を若干遅れさせたり、または速く進めること
により、確実に歯の噛合いが行なわれる。With this configuration, in order to transmit the driving force from the drive gear 104 to the toothless gear 102, the toothless gear 102
Is rotated by the coil spring 106 to rotate the drive gear 10
When the tooth tips of the gears are synchronized with each other (when the tooth tips come into contact with each other) when meshing with the gear 4, the driving gear 104
Contact the odd-numbered tooth slope T1 of the first tooth or the slope T2 of the second tooth of the toothless gear 102, thereby causing the toothless gear 1
By slightly delaying or advancing the rotation of 02 slightly, the meshing of the teeth is ensured.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、上記従
来の装置では、駆動歯車１０４側から駆動力を欠歯歯車
１０２側に伝達する場合には良好であるが、欠歯歯車１
０２から駆動歯車１０４を駆動を伝達する場合には、欠
歯歯車１０２側の回転を遅らせたり速めたりすることが
できないため、歯先同士が接触したときに衝撃音を発生
したり、歯先を破損させる等の問題が生じた。However, in the above-described conventional apparatus, it is good when the driving force is transmitted from the driving gear 104 side to the toothless gear 102 side.
In the case where the drive is transmitted from the drive gear 104 to the drive gear 104, the rotation of the toothless gear 102 cannot be slowed or accelerated. Problems such as damage occurred.
【０００９】本発明は、以上の問題点に鑑みてなされた
ものであり、欠歯歯車を備えた駆動伝達装置において、
欠歯歯車から歯車へ駆動を伝達する際の歯の噛合い開始
を良好にすることを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a drive transmission device having a toothless gear has the following features.
An object of the present invention is to improve the start of meshing of teeth when transmitting drive from a toothless gear to a gear.
【００１０】[0010]
【課題を解決するための手段】本発明は、部分的に歯の
ない欠歯部を有する欠歯歯車と、この欠歯歯車に噛合い
可能な被駆動歯車とを有し、前記欠歯歯車から前記被駆
動歯車へ回転を伝達する駆動伝達装置において、前記欠
歯歯車において、欠歯部と前記被駆動歯車とが対向した
状態から該欠歯歯車が回転した際に被駆動歯車と噛合い
を開始する側に位置する所定数の連続する複数の歯のう
ち、欠歯部側から奇数番目の歯には欠歯歯車の回転方向
の前側の歯面の歯先側から後側の歯面の歯元側に向けて
切り欠いた奇数歯斜面を形成し、偶数番目の歯には回転
方向の前側の歯面の歯元側から後側の歯面の歯先側に向
けて切り欠いた偶数歯斜面を形成したことを特徴とす
る。According to the present invention, there is provided a toothless gear having a partially toothless toothless portion, and a driven gear which can mesh with the toothless gear. In the drive transmission device for transmitting rotation from the gear to the driven gear, the toothless gear meshes with the driven gear when the toothless gear rotates from a state in which the toothless portion faces the driven gear. Of the predetermined number of continuous teeth located on the side where the start is started, the odd-numbered teeth from the toothless portion side include the front tooth surface to the rear tooth surface of the front tooth surface in the rotation direction of the toothless gear. An odd-numbered tooth slope was cut out toward the root side of the tooth, and the even-numbered teeth were cut away from the root side of the front tooth side in the rotational direction to the tip side of the rear tooth side. It is characterized in that an even tooth slope is formed.
【００１１】[0011]
【発明の実施の形態】まず、図1及び図２に基づいて本
発明の駆動伝達装置を備えたシート給送装置１を説明す
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a sheet feeding device 1 provided with a drive transmission device according to the present invention will be described with reference to FIGS.
【００１２】２はシートＳを支持する中板であり、揺動
自在に支持されていて、図示しない給紙ばねにより給紙
ローラ４側に付勢されている。給紙ローラ４は給紙軸６
に取り付けられており、給紙軸６が回転することによ
り、中板２に支持されているシートＳを送り出す。後述
する駆動伝達装置により回転されるカム８が中板２に設
けられているコロ２ａと摺接しており、カム８が回転す
ることにより中板２が給紙ばねの弾性力に抗して下降し
て給紙を行わない待機状態となる(図１の状態)。Reference numeral 2 denotes a middle plate for supporting the sheet S, which is swingably supported and is urged toward the paper feed roller 4 by a paper feed spring (not shown). The feed roller 4 is a feed shaft 6
And feeds the sheet S supported by the middle plate 2 by the rotation of the paper feed shaft 6. A cam 8 rotated by a drive transmission device described later is in sliding contact with a roller 2a provided on the middle plate 2, and the rotation of the cam 8 lowers the middle plate 2 against the elastic force of the paper feed spring. As a result, a standby state in which paper is not fed (state in FIG. 1).
【００１３】１０は給紙ローラ４に圧接可能に設けられ
た分離パッドであり、給紙ローラ４によって送り出され
たシートを一枚ずつ分離する。Reference numeral 10 denotes a separation pad provided so as to be capable of being pressed against the paper feed roller 4, and separates the sheets fed by the paper feed roller 4 one by one.
【００１４】つづいて、図３ないし図６に基づいて給紙
ローラ４及びカム８の回転制御をするための駆動伝達装
置１２を説明する。図3は駆動伝達装置１２の正面図、
図４は図３のＡ矢視図、図５は歯車列の詳細を示す斜視
図、図６は中板２を昇降させるカム８の形状を示す図で
ある。Next, the drive transmission device 12 for controlling the rotation of the paper feed roller 4 and the cam 8 will be described with reference to FIGS. FIG. 3 is a front view of the drive transmission device 12,
FIG. 4 is a view taken in the direction of arrow A in FIG. 3, FIG. 5 is a perspective view showing details of a gear train, and FIG.
【００１５】１４は装置本体側に設けられている軸１６
に支持された駆動歯車であり、図示しないモータ等の駆
動源から駆動を受けて常時図３中Ｂ方向に回転してい
る。１６は給紙ローラへ駆動の伝達を制御するための電
磁クラッチであり、駆動歯車１４が電磁クラッチ１６の
歯車１６ａと噛合っていて回転駆動を歯車１６ａに伝達
している。そして、電磁クラッチ１６がオンすることに
より歯車１６ａの回転が給紙軸６に伝達されて給紙ロー
ラ４が回転し、電磁クラッチ１６がオフすると歯車１６
ａの回転が給紙軸６に伝達されず給紙ローラ４への回転
駆動の伝達が遮断される。Reference numeral 14 denotes a shaft 16 provided on the apparatus main body side.
The driving gear is driven by a driving source such as a motor (not shown) and constantly rotates in the direction B in FIG. Reference numeral 16 denotes an electromagnetic clutch for controlling transmission of drive to the paper feed roller. A drive gear 14 is meshed with a gear 16a of the electromagnetic clutch 16 and transmits rotational drive to the gear 16a. When the electromagnetic clutch 16 is turned on, the rotation of the gear 16a is transmitted to the paper feed shaft 6, and the paper feed roller 4 is rotated. When the electromagnetic clutch 16 is turned off, the gear 16a is turned off.
The rotation of a is not transmitted to the paper feed shaft 6 and the transmission of the rotation drive to the paper feed roller 4 is cut off.
【００１６】１８は電磁クラッチ１６の軸と同軸上に支
持されたカム歯車であり、このカム歯車１８とカム８と
は一体に形成されている。カム８は中板２に設けられて
いるコロ２ａの半径よりも大きな半径の窪み８ａが形成
されていて、この窪み８ａとコロ２ａとが係合した状態
のときに中板２が下降位置に維持される。Reference numeral 18 denotes a cam gear supported coaxially with the axis of the electromagnetic clutch 16, and the cam gear 18 and the cam 8 are formed integrally. The cam 8 is formed with a depression 8a having a radius larger than the radius of the roller 2a provided on the intermediate plate 2, and when the depression 8a and the roller 2a are engaged, the intermediate plate 2 is in the lowered position. Will be maintained.
【００１７】２０は歯のない欠歯部２０ａを有した欠歯
歯車であり、欠歯歯車２０の歯車２０が、駆動歯車１４
に噛合って常時回転している電磁クラッチ１６の歯車１
６ａと噛合ったときに，欠歯歯車２０へ回転が伝達され
る。また、欠歯歯車２０がカム歯車１８と噛合ったとき
に、欠歯歯車２０からカム歯車１８へ回転が伝達され
る。したがって、欠歯歯車２０の欠歯部２０ａが電磁ク
ラッチ１６の歯車１６ａ及びカム歯車１８と対向してい
るときには回転の伝達が行なわれない。Reference numeral 20 denotes a toothless gear having a toothless portion 20a having no teeth.
Gear 1 of the electromagnetic clutch 16 that is constantly rotating in mesh with
The rotation is transmitted to the toothless gear 20 when meshing with 6a. When the missing gear 20 meshes with the cam gear 18, the rotation is transmitted from the missing gear 20 to the cam gear 18. Therefore, when the toothless portion 20a of the toothless gear 20 is opposed to the gear 16a of the electromagnetic clutch 16 and the cam gear 18, the transmission of rotation is not performed.
【００１８】つぎに、欠歯歯車２０を欠歯部２０aが歯
車１６a及びカム歯車１８に対向する位置で停止させる
ための規制手段について説明する。Next, a regulating means for stopping the toothless gear 20 at a position where the toothless portion 20a faces the gear 16a and the cam gear 18 will be described.
【００１９】欠歯歯車２０には，ソレノイド２２の可動
片２２ａに設けられている爪部２２ｂが係合する係止突
起２０ｄが一体に設けられており、爪部２２ｂと係止突
起２０ｄとが係合することにより、欠歯歯車２０の欠歯
部２０ａが電磁クラッチ１６の歯車１６ａ及びカム歯車
１８とが対向した状態で停止される。ソレノイド２２
は、非励磁時には引張りバネ２４により爪部２２ｂが係
止突起２０ｄと係合するように可動片２２ａが付勢され
ており、励磁されることにより可動片２２ａが吸引され
て爪部２２ｂが係止突起２０ｄから外れるように移動す
る。また、欠歯歯車２０は、板バネ２６により図３のＣ
方向に回転付勢されており、ソレノイド２２の爪２２ｂ
が係止突起２０ｄから外れたときに欠歯歯車２０は電磁
クラッチ１６の歯車１６ａ及びカム歯車１８と噛合うよ
うに回転する。The toothless gear 20 is integrally provided with a locking projection 20d for engaging a claw 22b provided on a movable piece 22a of the solenoid 22, and the claw 22b and the locking projection 20d are integrated. By the engagement, the toothless portion 20a of the toothless gear 20 is stopped with the gear 16a of the electromagnetic clutch 16 and the cam gear 18 facing each other. Solenoid 22
In the non-excitation mode, the movable piece 22a is urged by the tension spring 24 so that the claw portion 22b engages with the locking projection 20d. It moves so that it may come off from stop projection 20d. Further, the toothless gear 20 is formed by a leaf spring 26 as shown in FIG.
And the claw 22b of the solenoid 22
Is removed from the locking projection 20d, the toothless gear 20 rotates so as to mesh with the gear 16a of the electromagnetic clutch 16 and the cam gear 18.
【００２０】次に、本発明の特徴とする欠歯歯車２０の
形状について図７ないし図９に基づいて詳細に説明す
る。Next, the shape of the toothless gear 20 which is a feature of the present invention will be described in detail with reference to FIGS.
【００２１】駆動歯車１４、電磁クラッチ１６の歯車１
６ａはインボリュート歯車等の一般的に使用されている
歯形状を有している。欠歯歯車２０及びカム歯車１８
は、インボリュート歯車等の歯形状に対して一部の歯の
形状を改良している。The driving gear 14 and the gear 1 of the electromagnetic clutch 16
6a has a generally used tooth shape such as an involute gear. Missing gear 20 and cam gear 18
Has improved the shape of some teeth with respect to the shape of teeth such as involute gears.
【００２２】欠歯歯車２０は電磁クラッチ１６の歯車１
６ａと噛合う第１の部分２０ｂとカム歯車１８と噛合う
第２の部分２０ｃとで形成されている。図7に示すよう
に、第1の部分２０ｂは欠歯部２０ａから噛合いを開始
する最初の１歯目２０ｂ−１が、回転方向前側の歯面の
歯元側から後側の歯面の歯先側に向けて切り欠いて斜面
Ｃ１が形成されている。この斜面Ｃ１により従来の技術
で述べたように、歯車１６ａとの確実な噛合いが行なえ
る。The toothless gear 20 is the gear 1 of the electromagnetic clutch 16.
6a and a second portion 20c that meshes with the cam gear 18. As shown in FIG. 7, in the first portion 20b, the first first tooth 20b-1 which starts meshing from the toothless portion 20a is formed from the tooth root side of the front tooth surface in the rotation direction to the rear tooth surface. A slope C1 is formed notched toward the tooth tip side. As described in the related art, reliable engagement with the gear 16a can be achieved by the slope C1.
【００２３】なお、ここで、歯面とは、噛合う歯車の歯
同士が当接する面のことを言い、回転方向前側の歯面と
は、一つの歯において回転方向の下流側に位置する面で
あり、回転方向後側の歯面とは回転方向の上流側に位置
する面である。Here, the term “tooth surface” refers to a surface where the teeth of the gears meshing with each other abut against each other, and the front tooth surface in the rotational direction refers to a surface of one tooth positioned downstream in the rotational direction. And the tooth surface on the rear side in the rotation direction is a surface located on the upstream side in the rotation direction.
【００２４】図7の破線に示すように、第２の部分２０
ｃは欠歯部２０ａから噛合いを開始する最初の１歯目２
０ｃ−１が第１の部分２０ｂの２歯目２０ｂ−２の位置
に対応する位置から始まってる。As shown by the broken line in FIG.
c is the first tooth 2 that starts meshing from the toothless portion 20a
0c-1 starts from a position corresponding to the position of the second tooth 20b-2 of the first portion 20b.
【００２５】図８に示すように、この１歯目２０ｃ−１
は回転方向前側の歯面の歯先側から後側の歯面の歯元側
に向けて切り欠かれた斜面（奇数歯斜面）Ｃ２が形成さ
れており、２歯目２０ｃ−２は回転方向前側の歯面の歯
元側から後側の歯面の歯先側に向けて切り欠かれた斜面
（偶数歯斜面）Ｃ３が形成されている。３歯目２０ｃ−
３は１歯目と同様に回転方向前側の歯面の歯先側から後
側の歯面の歯元側に向けて切り欠かれた斜面Ｃ４が形成
されている。As shown in FIG. 8, this first tooth 20c-1
Is formed with an inclined surface (odd-numbered inclined surface) C2 cut out from the tooth tip side of the front tooth surface in the rotation direction to the root side of the rear tooth surface, and the second tooth 20c-2 is in the rotation direction. A slope (even-numbered tooth slope) C3 is formed by cutting out from the root side of the front tooth surface to the tip side of the rear tooth surface. 3rd tooth 20c-
No. 3 is formed with a slope C4 cut out from the tip of the front tooth surface in the rotation direction to the root of the rear tooth surface in the same manner as the first tooth.
【００２６】なお、それ以降の歯についても、奇数番目
の歯には回転方向前側の歯面の歯先側から後側の歯面の
歯元側に向けて切り欠かれた斜面を形成し、偶数番目の
歯には回転方向前側の歯面の歯元側から後側の歯面の歯
先側に向けて切り欠かれた斜面を形成してもよい。ま
た、１歯目に斜面Ｃ１，２歯目に斜面Ｃ２だけを形成し
てもよい。For the subsequent teeth, the odd-numbered teeth are formed with a slope cut out from the tip of the front tooth surface in the rotational direction to the root of the rear tooth surface in the rotational direction. The even-numbered teeth may have a slope cut out from the root side of the front tooth surface in the rotational direction to the tip side of the rear tooth surface in the rotation direction. Further, only the slope C1 may be formed on the first tooth and the slope C2 may be formed on the first tooth.
【００２７】図８に示すように、カム歯車１８は、欠歯
歯車２０噛合いを開始する部分の前後数個の歯１８ａ
に、回転方向前側の歯面の歯元側から後側の歯面の歯先
側に向けて切り欠かれた斜面（被駆動歯斜面）Ｃ５が形
成されている。この斜面Ｃ５は、図９に示すように、欠
歯歯車２０の１歯目２０ｃ−１の先端の回転軌跡の範囲
を逃がすように歯の先端が削り取られた形状に形成され
ている。この斜面Ｃ５は図８に示すように部分的に設け
てもよいし、カム歯車１８の全ての歯に設けてもよい。As shown in FIG. 8, the cam gear 18 has several teeth 18a before and after the part where the toothless gear 20 starts meshing.
In addition, there is formed a slope (driven tooth slope) C5 cut out from the root side of the front tooth surface in the rotation direction to the tip side of the rear tooth surface in the rotation direction. As shown in FIG. 9, the slope C5 is formed in a shape in which the tips of the teeth are cut off so as to escape the range of the rotation locus of the tip of the first tooth 20c-1 of the toothless gear 20. This slope C5 may be provided partially as shown in FIG. 8, or may be provided on all the teeth of the cam gear 18.
【００２８】なお、図１０（a），（b），（ｃ）にカム
歯車１８に欠歯歯車２０の第２の部分２０ｃと噛合う状
態を示す図である。FIGS. 10 (a), 10 (b) and 10 (c) are views showing a state where the cam gear 18 meshes with the second portion 20c of the toothless gear 20. FIG.
【００２９】以上の構成にかかる作用を説明する。The operation of the above configuration will be described.
【００３０】シート給送装置１において、非給紙時に
は、駆動歯車１４から電磁クラッチ１６の歯車１６ａへ
回転が伝達されているが、電磁クラッチ１６がオフとな
っているため給紙ローラ４は停止している。また、ソレ
ノイド２２も非励磁状態であるため、可動片２２ａの爪
部２２ｂが欠歯歯車２０の係止突起２０ｄに係合して欠
歯部２０ａが電磁クラッチ１６の歯車１６ａ及びカム歯
車１８と対向した状態で停止している。カム８は中板２
を給紙ばねの弾性力に抗して下降させて、中板２に積載
しているシートＳと給紙ローラ４とを離間させている。
また、カム８は中板２のコロ２ａと窪み８ａで係合して
回転が規制されている。In the sheet feeding apparatus 1, when paper is not fed, rotation is transmitted from the drive gear 14 to the gear 16a of the electromagnetic clutch 16, but the feed roller 4 is stopped because the electromagnetic clutch 16 is off. doing. Further, since the solenoid 22 is also in a non-excited state, the claw portion 22b of the movable piece 22a is engaged with the locking projection 20d of the toothless gear 20, and the toothless portion 20a is in contact with the gear 16a and the cam gear 18 of the electromagnetic clutch 16. It is stopped facing. The cam 8 is the middle plate 2
Is lowered against the elastic force of the sheet feeding spring to separate the sheet S stacked on the middle plate 2 from the sheet feeding roller 4.
Further, the cam 8 is engaged with the roller 2a of the middle plate 2 by the recess 8a to restrict the rotation.
【００３１】給紙時には、給紙信号に基づいて所定のタ
イミングで電磁クラッチ１６がオンになって給紙ローラ
４が回転し、また、所定のタイミングでソレノイド２２
が励磁されると、爪部２２ｂが係合突起２０ｄから外れ
て欠歯歯車２０が板ばね２６により回転し、まず第１の
部分２０ｂの１歯目２０ｂ−１が電磁クラッチ１６の歯
車１６ａに噛合って回転の伝達が開始される。このと
き、前述したように、第１の部分２０ｂの１歯目２０ｂ
−１に形成されている斜面Ｃ１により確実に安定した噛
合いが行なわれる。At the time of paper feeding, the electromagnetic clutch 16 is turned on at a predetermined timing based on a paper feeding signal, and the paper feeding roller 4 rotates.
Is excited, the claw portion 22b is disengaged from the engagement projection 20d, and the toothless gear 20 is rotated by the leaf spring 26. First, the first tooth 20b-1 of the first portion 20b is connected to the gear 16a of the electromagnetic clutch 16. The transmission of rotation is started by meshing. At this time, as described above, the first tooth 20b of the first portion 20b
Stable meshing is surely performed by the slope C1 formed at −1.
【００３２】つづいて、欠歯歯車２０の第２の部分２０
ｃとカム歯車１８とが噛合いを開始してカム歯車１８が
回転し、カム８が回転して窪み８ａからコロ２ａが外れ
て給紙ばねにより中板２が上昇する。これにより、中板
２に支持されているシートＳが給紙ローラ４と圧接して
送り出される。送り出されたシートは分離パッド１０に
より一枚ずつ分離される。Subsequently, the second portion 20 of the toothless gear 20
c and the cam gear 18 start meshing, the cam gear 18 rotates, the cam 8 rotates, the roller 2a is disengaged from the recess 8a, and the middle plate 2 is raised by the sheet feeding spring. As a result, the sheet S supported by the middle plate 2 is pressed against the sheet feed roller 4 and sent out. The fed sheets are separated one by one by a separation pad 10.
【００３３】カム歯車１８の停止位置は、カムの窪み８
ａと中板２のコロ２ａとの係合により決まるが、窪み８
ａの半径がコロ２ａの半径よりも大きいため誤差が生じ
てしまう。そのため、欠歯歯車２０が回転してカム歯車
１８に噛合う直前に、図９に示すように欠歯歯車２０の
１歯目２０ｃ−１の歯先とカム歯車１８の歯１８ａの歯
先とが近い位置に存在する場合があるが、欠歯歯車２０
の１歯目２０ｃ−１に形成されている斜面Ｃ２と、カム
歯車１８の歯１８ａに形成されている逃げの斜面Ｃ５と
によって歯先が小さくなっているため歯先同士が実際に
接触することはほとんどない。これにより、歯先の衝突
による異音の発生や破損を大幅に低減することができ
る。The stop position of the cam gear 18 is determined by the cam recess 8
a and the roller 2a of the intermediate plate 2,
Since the radius of a is larger than the radius of the roller 2a, an error occurs. Therefore, immediately before the toothless gear 20 rotates and meshes with the cam gear 18, the tooth tip of the first tooth 20 c-1 of the toothless gear 20 and the tooth tip of the tooth 18 a of the cam gear 18 as shown in FIG. May exist at a close position, but the toothless gear 20
Of the first tooth 20c-1 and the flank C5 of the flank formed on the tooth 18a of the cam gear 18 have a small tooth tip, so that the tooth tips actually contact each other. Almost no. Thereby, generation and breakage of abnormal noise due to collision of the tooth tip can be significantly reduced.
【００３４】もし、欠歯歯車２０が回転してカム歯車１
８と噛合うときに、欠歯歯車２０の１歯目２０Ｃ−１の
歯先の上流側がカム歯車１８の歯先の下流側に近い位置
にある場合でも、欠歯歯車２０の２歯目２０ｃ−２に形
成されている斜面Ｃ３によりカム歯車１８の次の歯の歯
先が欠歯歯車２０の２歯目２０ｃ−２の歯先に接触する
ことがない。すなわち、欠歯歯車２０の１歯目２０ｃ−
１と２歯目２０ｃ−２との間が斜面Ｃ３により逃げが形
成されて間隔が広がっているためカム歯車１８の歯先が
２歯目２０ｃ−２の歯先に接触することがなくなる。If the toothless gear 20 rotates and the cam gear 1
8, the second tooth 20c of the missing tooth gear 20 even if the upstream side of the tooth tip of the first tooth 20C-1 of the toothless gear 20 is located closer to the downstream side of the tooth tip of the cam gear 18. The tip of the next tooth of the cam gear 18 does not contact the tip of the second tooth 20c-2 of the toothless gear 20 due to the slope C3 formed at -2. That is, the first tooth 20c of the toothless gear 20
The clearance between the first and second teeth 20c-2 is widened by the clearance formed by the inclined surface C3, so that the tip of the cam gear 18 does not contact the tip of the second tooth 20c-2.
【００３５】さらに、欠歯歯車２０が回転してカム歯車
１８と噛合うときに、カム歯車１８の歯先が欠歯歯車２
０の２歯目２０ｃ−２の歯先に接触する程近い位置にあ
る場合でも、欠歯歯車２０の３歯目２０ｃ−３に形成さ
れている２歯目２０ｃ−２の斜面Ｃ３とは逆向きの斜面
Ｃ４により、カム歯車１８の歯先が接触することがな
い。Further, when the toothless gear 20 rotates and meshes with the cam gear 18, the tip of the cam gear 18 is
0, even if it is close enough to contact the tip of the second tooth 20c-2, it is opposite to the slope C3 of the second tooth 20c-2 formed on the third tooth 20c-3 of the toothless gear 20. Due to the inclined surface C4, the tip of the cam gear 18 does not contact.
【００３６】このようにして、欠歯歯車２０とカム歯車
１８との噛合い時に歯先の位相がずれていて歯先が接触
する虞がある状態でも、欠歯歯車２０が３歯分回転する
ことによりカム歯車１８が通常の噛合いに強制的に直さ
れて、それ以降は正しい状態での回転の伝達が行なわれ
る。したがって、欠歯歯車２０からカム歯車１８に回転
を伝達する際でも、歯先同士か接触することがなく、衝
撃音や歯先の破損等を発生することなく安定した確実な
回転の伝達が行なえる。In this manner, the toothless gear 20 rotates by three teeth even in a state where the phase of the toothtip is out of phase when the toothless gear 20 and the cam gear 18 mesh with each other and there is a possibility that the toothtip may come into contact. As a result, the cam gear 18 is forcibly restored to the normal meshing state, and thereafter, the rotation is transmitted in a correct state. Therefore, even when the rotation is transmitted from the toothless gear 20 to the cam gear 18, the tooth tips do not come into contact with each other, and a stable and reliable transmission of the rotation can be performed without generating an impact sound, damage to the tooth tip, or the like. You.
【００３７】なお、カム歯車１８の欠歯歯車２０と噛合
いを開始する部分は傾斜Ｃ５が形成されているため、歯
先同士が接触しなくても欠歯歯車２０の歯が衝突して大
きな衝撃を受けたときに破損しやすいので次のように構
成してもよい。Since a portion of the cam gear 18 which starts to mesh with the toothless gear 20 is formed with a slope C5, the teeth of the toothless gear 20 collide with each other even if the tips do not contact each other. Since it is easy to be damaged when receiving an impact, it may be configured as follows.
【００３８】図１１に示すように、カム歯車１８におい
て歯先に斜面Ｃ５が形成されている歯１８aを有する部
分３０をカム歯車１８の軸方向にスライド可能に設け、
その部分３０を交換できるようにする。これによって、
損傷時の補修作業が歯車全体を交換する必要がないため
容易となりメンテナンス性が向上する。この交換可能な
部分３０の材質を強度の高いものにしてもよい。As shown in FIG. 11, a portion 30 of the cam gear 18 having a tooth 18a having a slope C5 formed at the tooth tip is provided so as to be slidable in the axial direction of the cam gear 18.
The part 30 is made replaceable. by this,
Repair work at the time of damage is facilitated because it is not necessary to replace the entire gear, thereby improving maintainability. The replaceable portion 30 may be made of a material having high strength.
【００３９】また、図１２に示すように、カム歯車１８
において歯先に斜面Ｃ５が形成されている歯１８aを有
する部分３２を二色成形により他の部分より強度の高い
材質にしてもよい。これは、歯車全体を強度の高い材質
にしてしまうとコストが高くなってしまうが、部分的に
強度の高い材質を使うことによりコストアップを抑えて
耐久性を向上させることができ高い信頼性を得ることが
できる。Also, as shown in FIG.
In the above, the portion 32 having the tooth 18a having the slope C5 formed at the tooth tip may be made of a material having higher strength than other portions by two-color molding. This is because if the entire gear is made of a high-strength material, the cost will increase.However, by using a partially high-strength material, the cost increase can be suppressed and the durability can be improved. Obtainable.
【００４０】図１３及び図１４にカム歯車の歯先の形状
及び欠歯歯車２０の第２の部分２０ｃの歯先の形状の他
の例を示す。FIGS. 13 and 14 show other examples of the shape of the tip of the cam gear and the shape of the tip of the second portion 20c of the toothless gear 20. FIG.
【００４１】図１３（a），（b），（ｃ）に示すもの
は、カム歯車１８の歯先に斜面C５を形成しないものを
示している。欠歯歯車２０の第２の部分２０ｃの歯には
それぞれ上記実施例と同様に斜面Ｃ２及び斜面Ｃ３が形
成されている。この構成によっても、カム歯車へ欠歯歯
車が噛合う際に歯先の衝突を低減することができる。FIGS. 13 (a), 13 (b) and 13 (c) show the cam gear 18 without the slope C5 at the tooth tip. A slope C2 and a slope C3 are formed on the teeth of the second portion 20c of the toothless gear 20 in the same manner as in the above embodiment. Also according to this configuration, it is possible to reduce the collision of the tooth tips when the missing tooth gear meshes with the cam gear.
【００４２】図１４（a），（b），（ｃ）に示すもの
は、カム歯車１８の歯先には斜面C５を設け、欠歯歯車
２０の第２の部分２０ｃの１歯目の歯先に斜面C２を形
成せず、２歯目の歯先に斜面C３のみを形成したもので
ある。この構成によっても、カム歯車へ欠歯歯車が噛合
う際に歯先の衝突を低減することができる。14 (a), (b) and (c), the cam gear 18 has a bevel C5 at the tip of the tooth thereof, and the first tooth of the second portion 20c of the toothless gear 20. The slope C2 is not formed first, and only the slope C3 is formed at the tip of the second tooth. Also according to this configuration, it is possible to reduce the collision of the tooth tips when the missing tooth gear meshes with the cam gear.
【００４３】以上、本発明の実施の形態について説明し
たが、上記構成において、例えば次のような変形が可能
である。カム歯車は欠歯歯車と噛合いを開始する部分の
歯に斜面を形成したが、すべての歯に斜面を形成しても
よい。また、欠歯歯車のカム歯車と噛合いを開始する部
分の歯の内側にスリットを設けて部分的に撓むようにし
て衝撃の緩和を図るようにしてもよい。Although the embodiment of the present invention has been described above, the following modifications can be made in the above configuration. In the cam gear, the slopes are formed on the teeth at the part where the cam gear starts to mesh with the toothless gear, but the slopes may be formed on all the teeth. Further, a slit may be provided inside the tooth of the portion of the toothless gear that starts to mesh with the cam gear, so that the tooth is partially bent to reduce the impact.
【００４４】また、上記実施の形態では、中板を昇降す
るカムに回転を伝達するための駆動伝達装置について説
明したが、同様の構成の駆動伝達装置を上記実施の形態
の電磁クラッチの代わりに使用して、給紙ローラの回転
を制御するようにしてもよい。さらに、カムと給紙ロー
ラの両方の回転を制御するようにこの駆動伝達装置を用
いてもよい。In the above-described embodiment, the drive transmission device for transmitting rotation to the cam that moves up and down the middle plate has been described. However, a drive transmission device having a similar configuration is used instead of the electromagnetic clutch of the above-described embodiment. It may be used to control the rotation of the paper feed roller. Further, the drive transmission device may be used to control the rotation of both the cam and the paper feed roller.
【００４５】つぎに、上記構成のシート給送装置１を備
えた画像形成装置Ｐを図１５に基づいて概略説明する。
この画像形成装置Ｐは、レーザービームプリンタであ
り、図示しないホストコンピュータからの情報に基づい
てスキャナユニット５０がレーザーを転写ドラム５２に
照射する。転写ドラム５２はドラムカートリッジ５４内
に配設されており、公知の電子写真プロセスによってト
ナー像が形成され、このトナー像はシート給送装置１か
ら送り出されたシートに転写ローラ５６によって転写さ
れる。Next, an image forming apparatus P provided with the sheet feeding apparatus 1 having the above-described configuration will be schematically described with reference to FIG.
The image forming apparatus P is a laser beam printer, and the scanner unit 50 irradiates a laser to the transfer drum 52 based on information from a host computer (not shown). The transfer drum 52 is disposed in a drum cartridge 54, and a toner image is formed by a known electrophotographic process. The toner image is transferred to a sheet sent from the sheet feeding device 1 by a transfer roller 56.
【００４６】トナー像が転写されたシートは定着ユニッ
ト５８により加熱・加圧されて像が定着される。このよ
うにして画像が形成されたシートは搬送ローラ対６０、
６２、排出ローラ６４などにより排紙トレイ６６上に排
出される。The sheet on which the toner image has been transferred is heated and pressed by the fixing unit 58 to fix the image. The sheet on which the image is formed in this manner is transported by a pair of conveying rollers 60,
The paper is discharged onto a paper discharge tray 66 by a discharge roller 62 and the like.
【００４７】[0047]
【発明の効果】以上説明したように、本発明は、回転駆
動力を欠歯歯車から歯車へ伝達する場合に、欠歯歯車の
噛合いを始める部分の歯先に所定方向の斜面を形成する
ことによって、歯先同士が接触することがなくなり不快
な振動や衝撃音の発生や歯先の破損を防止することがで
きる。As described above, according to the present invention, when the rotational driving force is transmitted from the toothless gear to the gear, a slope in a predetermined direction is formed on the tooth tip of the portion where the toothless gear starts to mesh. As a result, the tooth tips do not come into contact with each other, thereby preventing the generation of unpleasant vibration and impact noise and the damage to the tooth tips.
【図１】本発明のシート給送装置の一例を示す断面図FIG. 1 is a cross-sectional view illustrating an example of a sheet feeding apparatus according to the present invention.
【図２】本発明のシート給送装置の斜視図FIG. 2 is a perspective view of a sheet feeding apparatus according to the present invention.
【図３】本発明の駆動伝達装置の一例を示す正面図FIG. 3 is a front view showing an example of the drive transmission device of the present invention.
【図４】図３のA矢視図FIG. 4 is a view taken in the direction of arrow A in FIG. 3;
【図５】図３の駆動伝達装置の歯車列の斜視図FIG. 5 is a perspective view of a gear train of the drive transmission device of FIG. 3;
【図６】図３のカム歯車に設けられているカムの形状を
示す図FIG. 6 is a view showing a shape of a cam provided on the cam gear of FIG. 3;
【図７】図３の駆動伝達装置の歯車の歯の形状の詳細を
示す図7 is a diagram showing details of the shape of the gear teeth of the drive transmission device of FIG. 3;
【図８】図３の駆動伝達装置の歯車の歯の形状の詳細を
示す図8 is a diagram showing details of the shape of the gear teeth of the drive transmission device of FIG. 3;
【図９】図３の駆動伝達装置の歯車の歯の形状の詳細を
示す図9 is a diagram showing details of the shape of the gear teeth of the drive transmission device of FIG. 3;
【図１０】カム歯車に欠歯歯車が噛合う状態を示す図FIG. 10 is a view showing a state in which a missing gear meshes with a cam gear.
【図１１】欠歯歯車と噛合う被駆動歯車の他の構造を示
す図FIG. 11 is a diagram showing another structure of the driven gear meshing with the toothless gear;
【図１２】欠歯歯車と噛合う被駆動歯車の他の構造を示
す図FIG. 12 is a diagram showing another structure of the driven gear meshing with the toothless gear;
【図１３】カム歯車及び欠歯歯車の歯先の形状の他の例
を示す図FIG. 13 is a diagram showing another example of the shape of the tip of the cam gear and the toothless gear;
【図１４】カム歯車及び欠歯歯車の歯先の形状の他の例
を示す図FIG. 14 is a diagram showing another example of the shape of the tip of the cam gear and the toothless gear;
【図１５】本発明のシート給送装置を備えた画像形成装
置の一例を示す図FIG. 15 is a diagram illustrating an example of an image forming apparatus including the sheet feeding device according to the invention.
【図１６】従来の駆動伝達装置の一例を示す正面図FIG. 16 is a front view showing an example of a conventional drive transmission device.
１ シート給送装置 ２ 中板 ４ 給紙ローラ（給紙手段） ８ カム １２ 駆動伝達装置 １６ 電磁クラッチ １６ａ 電磁クラッチの歯車 １８ カム歯車（被駆動歯車） ２０ 欠歯歯車 ２０ａ 欠歯部 ２０ｂ 第１の部分 ２０ｃ 第２の部分 奇数番目の歯 ２０ｃ−１、２０ｃ−３ 偶数番目の歯 ２０ｃ−２ ２２ ソレノイド（規制手段） ２６ 板ばね（付勢手段） Ｃ２，Ｃ４ 斜面（奇数歯斜面） Ｃ３ 斜面（偶数歯斜面） Ｃ５ 斜面（被駆動歯斜面） REFERENCE SIGNS LIST 1 sheet feeding device 2 middle plate 4 paper feed roller (paper feed means) 8 cam 12 drive transmission device 16 electromagnetic clutch 16 a electromagnetic clutch gear 18 cam gear (driven gear) 20 toothless gear 20 a toothless part 20 b first Part 20c Second part Odd-numbered teeth 20c-1, 20c-3 Even-numbered teeth 20c-2 22 Solenoid (regulating means) 26 Leaf spring (biasing means) C2, C4 Slope (odd tooth slope) C3 Slope (Even number tooth slope) C5 slope (Driven tooth slope)
Claims (14)
車と、この欠歯歯車に噛合い可能な被駆動歯車とを有
し、前記欠歯歯車から前記被駆動歯車へ回転を伝達する
駆動伝達装置において、 前記欠歯歯車において、欠歯部と前記被駆動歯車とが対
向した状態から該欠歯歯車が回転した際に被駆動歯車と
噛合いを開始する側に位置する所定数の連続する複数の
歯のうち、欠歯部側から奇数番目の歯には欠歯歯車の回
転方向の前側の歯面の歯先側から後側の歯面の歯元側に
向けて切り欠いた奇数歯斜面を形成し、偶数番目の歯に
は回転方向の前側の歯面の歯元側から後側の歯面の歯先
側に向けて切り欠いた偶数歯斜面を形成したことを特徴
とする駆動伝達装置。1. A toothless gear having a partially toothless toothless part, and a driven gear meshable with the toothless gear, wherein the driven gear rotates from the toothless gear to the driven gear. In the drive transmission device for transmitting, in the toothless gear, when the toothless gear rotates from a state in which the toothless portion and the driven gear face each other, a predetermined position located on a side where the driven gear starts to mesh with the driven gear. Of the plurality of consecutive teeth, the odd-numbered teeth from the missing tooth portion are cut from the front tooth surface of the front tooth surface in the rotation direction of the missing gear to the root surface of the rear tooth surface. A missing odd-numbered tooth slope was formed, and the even-numbered tooth was formed with an even-numbered tooth slope cut out from the root side of the front tooth surface in the rotation direction to the tip side of the rear tooth surface. Characteristic drive transmission device.
歯面の歯元側から後側の歯面の歯先側に向けて切り欠い
た被駆動歯斜面を形成したことを特徴とする請求項1に
記載の駆動伝達装置。2. The tooth of the driven gear is formed with a driven tooth slope which is notched from a root side of a front tooth surface in a rotational direction to a tooth end side of a rear tooth surface. The drive transmission device according to claim 1, wherein
の噛合い開始部分の近傍の歯にのみ、前記被駆動歯斜面
を形成したことを特徴とする請求項２に記載の駆動伝達
装置。3. The drive transmission device according to claim 2, wherein the driven tooth slope is formed only on a tooth of the driven gear in the vicinity of a portion where the engagement with the toothless gear is started.
歯車と対向する位置で停止させるための規制手段と、該
規制手段による規制が解除されたときに欠歯歯車を被駆
動歯車に噛合うように回転付勢する付勢手段とを有する
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
の駆動伝達装置。4. A restricting means for stopping the toothless gear at a position where the toothless portion faces the driven gear, and a driven gear when the restriction by the restricting means is released. The drive transmission device according to any one of claims 1 to 3, further comprising: an urging means for energizing the rotation so as to mesh with the power transmission device.
形成した歯の部分を別体に形成して被駆動歯車に着脱可
能にしたことを特徴とする請求項３に記載の駆動伝達装
置。5. The drive transmission device according to claim 3, wherein a tooth portion of the driven gear, which forms the inclined surface of the driven tooth, is formed separately so as to be detachable from the driven gear.
形成した歯の部分を、他の部分よりも強度の高い材質で
形成したことを特徴とする請求項３に記載の駆動伝達装
置。6. The drive transmission device according to claim 3, wherein the tooth portion of the driven gear, which forms the driven tooth slope, is formed of a material having higher strength than other portions.
車と、この欠歯歯車に噛合い可能な被駆動歯車とを有
し、前記欠歯歯車から前記被駆動歯車へ回転を伝達する
駆動伝達装置において、 前記欠歯歯車において、欠歯部と前記被駆動歯車とが対
向した状態から該欠歯歯車が回転した際に被駆動歯車と
噛合いを開始する側に位置する所定数の連続する複数の
歯のうち、欠歯部側から偶数番目の歯には前側の歯面の
歯元側から後側の歯面の歯先側に向けて切り欠いた偶数
歯斜面を形成し、前記被駆動歯車の歯に、回転方向の前
側の歯面の歯元側から後側の歯面の歯先側に向けて切り
欠いた被駆動歯斜面を形成したことを特徴とする駆動伝
達装置。7. A toothless gear having a partially toothless toothless part, and a driven gear meshable with the toothless gear, wherein the driven gear rotates from the toothless gear to the driven gear. In the drive transmission device for transmitting, in the toothless gear, when the toothless gear rotates from a state in which the toothless portion and the driven gear face each other, a predetermined position located on a side where the driven gear starts to mesh with the driven gear. Of the multiple consecutive teeth, the even-numbered tooth from the missing tooth side has an even-numbered tooth slope cut out from the root of the front tooth surface to the tip of the rear tooth surface. And a driven tooth slope formed by cutting out the teeth of the driven gear from the root of the front tooth surface in the rotation direction to the tip of the rear tooth surface in the rotation direction. Transmission device.
の噛合い開始部分の近傍の歯にのみ、前記被駆動歯斜面
を形成したことを特徴とする請求項７に記載の駆動伝達
装置。8. The drive transmission device according to claim 7, wherein the driven tooth slope is formed only on the teeth of the driven gear near the portion where the meshing start with the toothless gear starts.
歯車と対向する位置で停止させるための規制手段と、該
規制手段による規制が解除されたときに欠歯歯車を被駆
動歯車に噛合うように回転付勢する付勢手段とを有する
ことを特徴とする請求項７または請求項８に記載の駆動
伝達装置。9. A restricting means for stopping said toothless gear at a position where said toothless part faces said driven gear, and said driving means drives said toothless gear when said restriction by said restricting means is released. The drive transmission device according to claim 7, further comprising: an urging unit that urges the rotation so as to mesh with the driving device.
を形成した歯の部分を別体に形成して被駆動歯車に着脱
可能にしたことを特徴とする請求項８に記載の駆動伝達
装置。10. The drive transmission device according to claim 8, wherein the teeth of the driven gear, which form the slopes of the driven teeth, are formed separately so as to be detachable from the driven gear.
を形成した歯の部分を、他の部分よりも強度の高い材質
で形成したことを特徴とする請求項８に記載の駆動伝達
装置。11. The drive transmission device according to claim 8, wherein the tooth portion of the driven gear, which forms the driven tooth slope, is formed of a material having a higher strength than other portions.
該中板に支持されたシートを送り出す給紙手段と、シー
トの非給送時に中板を下降させる回転するカムと、前記
カムに回転を伝達するための前記請求項１乃至１１のい
ずれか１項に記載の駆動伝達装置と、を備えたことを特
徴とするシート給送装置。12. An intermediate plate capable of supporting a sheet and moving up and down,
12. A sheet feeding means for feeding a sheet supported by the middle plate, a rotating cam for lowering the middle plate when the sheet is not fed, and a rotation transmitting mechanism for transmitting rotation to the cam. A sheet feeding device, comprising: the drive transmission device according to any one of the preceding claims.
持されたシートを送り出す給紙手段と、該給紙手段に回
転を伝達するための前記請求項１乃至１１のいずれか１
項に記載の駆動伝達装置と、を備えたことを特徴とする
シート給送装置。13. An intermediate plate for supporting a sheet, sheet feeding means for feeding out the sheet supported by the intermediate plate, and any one of claims 1 to 11 for transmitting rotation to said sheet feeding means.
A sheet feeding device, comprising: the drive transmission device according to any one of the preceding claims.
シート給送装置と、該シート給送装置から送り出された
シートに画像を形成する画像形成手段と、を有すること
を特徴とする画像形成装置。14. An image forming apparatus, comprising: the sheet feeding device according to claim 12; and image forming means for forming an image on a sheet fed from the sheet feeding device. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP573098A JPH10274312A (en) | 1997-01-30 | 1998-01-14 | Drive transmitter, sheet feeder and image forming device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1648497 | 1997-01-30 | ||
| JP9-16484 | 1997-01-30 | ||
| JP573098A JPH10274312A (en) | 1997-01-30 | 1998-01-14 | Drive transmitter, sheet feeder and image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10274312A true JPH10274312A (en) | 1998-10-13 |
Family
ID=26339727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP573098A Pending JPH10274312A (en) | 1997-01-30 | 1998-01-14 | Drive transmitter, sheet feeder and image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10274312A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6334725B1 (en) | 1999-08-20 | 2002-01-01 | Canon Kabushiki Kaisha | Drive transmitting apparatus and image forming apparatus |
| JP2002265076A (en) * | 2001-03-09 | 2002-09-18 | Canon Inc | Paper feeder and image forming apparatus having the same |
| JP2007532375A (en) * | 2004-04-08 | 2007-11-15 | ジョンソン・コントロールズ・ゲー・エム・ベー・ハー | Blocking mechanism especially for vehicle seats |
| JP2008056413A (en) * | 2006-08-30 | 2008-03-13 | Canon Inc | Sheet feeding device and image formation device |
| WO2016129692A1 (en) * | 2015-02-13 | 2016-08-18 | 日本電産サンキョー株式会社 | Damper device |
| JP2018017299A (en) * | 2016-07-27 | 2018-02-01 | コニカミノルタ株式会社 | Rotation force transmission mechanism, fixation device provided with the same and image formation device |
| US9919529B2 (en) | 2016-04-15 | 2018-03-20 | Seiko Epson Corporation | Cap unit and printer |
| JP2019131329A (en) * | 2018-01-30 | 2019-08-08 | ブラザー工業株式会社 | Paper conveying apparatus and image forming apparatus |
-
1998
- 1998-01-14 JP JP573098A patent/JPH10274312A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6334725B1 (en) | 1999-08-20 | 2002-01-01 | Canon Kabushiki Kaisha | Drive transmitting apparatus and image forming apparatus |
| JP2002265076A (en) * | 2001-03-09 | 2002-09-18 | Canon Inc | Paper feeder and image forming apparatus having the same |
| JP2007532375A (en) * | 2004-04-08 | 2007-11-15 | ジョンソン・コントロールズ・ゲー・エム・ベー・ハー | Blocking mechanism especially for vehicle seats |
| JP4908395B2 (en) * | 2004-04-08 | 2012-04-04 | ジョンソン・コントロールズ・ゲー・エム・ベー・ハー | Blocking mechanism especially for vehicle seats |
| JP2008056413A (en) * | 2006-08-30 | 2008-03-13 | Canon Inc | Sheet feeding device and image formation device |
| WO2016129692A1 (en) * | 2015-02-13 | 2016-08-18 | 日本電産サンキョー株式会社 | Damper device |
| CN107110316A (en) * | 2015-02-13 | 2017-08-29 | 日本电产三协株式会社 | Throttle setting |
| CN107110316B (en) * | 2015-02-13 | 2019-06-18 | 日本电产三协株式会社 | Throttle setting |
| US9919529B2 (en) | 2016-04-15 | 2018-03-20 | Seiko Epson Corporation | Cap unit and printer |
| JP2018017299A (en) * | 2016-07-27 | 2018-02-01 | コニカミノルタ株式会社 | Rotation force transmission mechanism, fixation device provided with the same and image formation device |
| JP2019131329A (en) * | 2018-01-30 | 2019-08-08 | ブラザー工業株式会社 | Paper conveying apparatus and image forming apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11635722B2 (en) | Driving force transmitting device, sheet feeding apparatus and image forming apparatus | |
| JP5383804B2 (en) | Sheet feeding apparatus and image forming apparatus | |
| JPH10153247A (en) | Drive controller, sheet feeder, and image forming device | |
| US5944305A (en) | Drive transmitting device, sheet feeding device and image forming apparatus | |
| JP4139958B2 (en) | Rotating clutch device, paper feeding device, and image forming apparatus | |
| US10703594B2 (en) | Sheet conveyance apparatus | |
| JPH10274312A (en) | Drive transmitter, sheet feeder and image forming device | |
| JP5094626B2 (en) | Drive switching mechanism and feeding device | |
| JP2919200B2 (en) | Recording device | |
| JP3912880B2 (en) | Clutch device and paper feeding device | |
| JP3848148B2 (en) | Recording device | |
| JPH10277995A (en) | Rolled recording paper feeding device | |
| JPH10148984A (en) | Driving transmission mechanism and image forming device | |
| JP7237510B2 (en) | sheet conveying device | |
| JP3389688B2 (en) | Paper feeder of image forming device | |
| JPH09112647A (en) | Gear device | |
| JP2019077560A (en) | Drive transmission device, sheet feeding device, and image formation device | |
| JP2002068497A (en) | Sheet material feeding device and image forming device | |
| JP3791327B2 (en) | Power transmission device, paper feeding device, and image forming apparatus | |
| JP4819622B2 (en) | Sheet feeding apparatus and image forming apparatus | |
| JP2020078890A (en) | Gear transmission device and image formation apparatus | |
| JP3463837B2 (en) | Paper feeder | |
| JPH09278205A (en) | Paper feeder | |
| JPH08333037A (en) | Drive transmission | |
| JP3176198B2 (en) | Drive transmission device and sheet feeding device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Effective date: 20040309 Free format text: JAPANESE INTERMEDIATE CODE: A02 |