JPH02270737A - Paper feeder for image forming device - Google Patents
Paper feeder for image forming deviceInfo
- Publication number
- JPH02270737A JPH02270737A JP1091855A JP9185589A JPH02270737A JP H02270737 A JPH02270737 A JP H02270737A JP 1091855 A JP1091855 A JP 1091855A JP 9185589 A JP9185589 A JP 9185589A JP H02270737 A JPH02270737 A JP H02270737A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- friction pad
- paper feed
- pressure plate
- bottom plate
- 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.)
- Granted
Links
- 238000003825 pressing Methods 0.000 claims abstract description 15
- 210000000078 claw Anatomy 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 4
- 238000011068 loading method Methods 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
上のり 野
本発明は、前側給紙方式の画像形成装置の給紙装置に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feeding device for an image forming apparatus of a front paper feeding type.
従迷−挟先
最近の複写記は、種々の倍率の変倍複写が可能なものが
多くその場合、使用する転写紙を自動的に切換えて給紙
することができるように多種のサイズの転写紙を別々の
給紙カセットトレイに収納して複写機に装着しておくこ
とが必要になる。このような場合、給紙カセットトレイ
への用紙の装填が容易でかつ複写機の両側に余裕スペー
スを多く必要としない利点を有するところから、給紙カ
セットトレイを複写装置本体から手前側に引出して用紙
を装填し、装置本体に手前側から押込んで所定の位置に
装着して給紙を行なう前側給紙方式（フロントローディ
ング方式）が適している。Confusion - Nip Tip Many modern copying systems are capable of variable-magnification copying at various magnifications. It is necessary to store paper in separate paper cassette trays and install them in the copying machine. In such cases, the paper cassette tray can be pulled out from the main body of the copying machine toward the front, since it is easy to load paper into the paper cassette tray and does not require a lot of free space on both sides of the copying machine. A front-side paper feeding method (front loading method) is suitable, in which paper is loaded, pushed into the main body of the apparatus from the front side, and mounted at a predetermined position to feed the paper.
第６図は、前側給紙方式の複写装置の概略外観を示す図
である。複写機本体１には、手差し給紙口１′が設けら
れてはいるが、通常の自動給紙は。FIG. 6 is a diagram showing a schematic appearance of a front-side paper feeding type copying apparatus. Although the copying machine main body 1 is provided with a manual paper feed slot 1', there is no normal automatic paper feed.
装置下部に設けられた給紙カセットバンク４，５に設け
られ手前側に引出し、手前側から押入れることのできる
引出し型カセットトレイ２により行なわれる。図示の例
では、カセットトレイ２は把手３を手で持って引き出す
ようになっているが、複写機本体上面手前側の操作部に
押ボタン６を設けて、その押下により、自動的に引出し
、押入れることも可能である。This is done using a pull-out cassette tray 2 that is provided in paper feed cassette banks 4 and 5 provided at the bottom of the apparatus and that can be pulled out to the front and pushed in from the front. In the illustrated example, the cassette tray 2 is pulled out by holding the handle 3 by hand, but a push button 6 is provided on the operation section on the front side of the top surface of the copying machine body, and when pressed, the cassette tray 2 is automatically pulled out. It is also possible to push it in.
さて、給紙カセットトレイ内に積載された用紙束を上か
ら順次１枚ずつ複写機の転写部に給紙する手段としては
、第７図に示す如く、カセット２の底部に後端を枢着さ
れ、前部下面を装置本体に給紙方向と直角方向に延設さ
れた軸８に固定された加圧板９の先端部により押上げら
れ、用紙束７を載置する底板１０を設け、装置本体側に
は所定の位置に装着されたカセット２内の底板１０が加
圧板９で押上げられた場合底板１０上に載置された用紙
束７の上面前端部に圧接する位置に給紙コ口１１を設け
、かつ、用紙束前端より給紙方向前方で給紙コロ１１の
下面に接離可能なフリクションパッド１３を設け、底板
１０上の用紙束７の上面の給紙コロ１１に対する給紙圧
Ｐ、フリクションパッド１３の給紙コロ１１に対するパ
ッド圧Ｑ、給紙コロ１１と用紙との間の摩擦係数、給紙
コロ１１とフリクションパッド１３との間の摩擦係数及
び用紙相互間の摩擦係数を適切に選ぶことにより、重送
を分離して上から１枚ずつ給紙するようにした摩擦分離
給紙方式が広く採用されている。Now, as a means for feeding the stack of sheets stacked in the paper feed cassette tray one sheet at a time from the top to the transfer section of the copying machine, the rear end is pivoted to the bottom of the cassette 2, as shown in FIG. A bottom plate 10 is provided on which a stack of sheets 7 is placed, the front lower surface of which is pushed up by the tip of a pressure plate 9 fixed to a shaft 8 extending perpendicular to the paper feeding direction in the apparatus main body. On the main body side, there is a paper feed control at a position where when the bottom plate 10 in the cassette 2 mounted in a predetermined position is pushed up by the pressure plate 9, it comes into pressure contact with the front end of the upper surface of the paper bundle 7 placed on the bottom plate 10. A friction pad 13 is provided which can come into contact with and separate from the lower surface of the paper feed roller 11 in front of the front end of the paper stack in the paper feeding direction, and the paper is fed to the paper feed roller 11 on the upper surface of the paper stack 7 on the bottom plate 10. pressure P, pad pressure Q of friction pad 13 against paper feed roller 11, friction coefficient between paper feed roller 11 and paper, friction coefficient between paper feed roller 11 and friction pad 13, and friction coefficient between papers. A friction separation paper feeding system is widely adopted in which double feeding is separated and paper is fed one by one from above by appropriately selecting the number of paper feeds.
その原理は公知であるから説明を省略する。Since the principle is well known, the explanation will be omitted.
第８図は上記方式の分離給紙装置の分離給紙部の１例を
示す図であって、給紙コロ１１は適当な摩擦係数を有す
る合成ゴムで作られ、給紙信号に応じて軸１２により図
中矢印で示す方向に回転する。フリクションパッド１３
はパッド台１４の上面に貼り付けられ、パッド台１４は
、その一端をピン１５により揺動自在に固定の支持台１
６に支持され、スプリング１７によりピン１５の回りに
反時計方向に、すなわちフリクションパッド１３が給紙
コロ１１に圧接する方向に付勢されており。FIG. 8 is a diagram showing an example of the paper separation and feeding section of the paper separation and feeding device of the above type, in which the paper feed roller 11 is made of synthetic rubber having an appropriate coefficient of friction, and the shaft is rotated according to the paper feed signal. 12 rotates in the direction shown by the arrow in the figure. Friction pad 13
is attached to the upper surface of the pad base 14, and the pad base 14 has one end fixed to the support base 1 swingably with a pin 15.
6, and is urged counterclockwise around the pin 15 by a spring 17, that is, in a direction in which the friction pad 13 comes into pressure contact with the paper feed roller 11.
これによりフリクションバット圧Ｑが与えられる、パッ
ド台１４は図示しない手段により引下げることにより、
フリクションパッド１３は給紙コロ１１より離間可能と
なっており、給紙はフリクションパッド１３が給紙コロ
１１に圧接している時にのみ可能となる。As a result, the friction butt pressure Q is applied, and the pad base 14 is pulled down by a means not shown.
The friction pad 13 can be separated from the paper feed roller 11, and paper feeding is possible only when the friction pad 13 is in pressure contact with the paper feed roller 11.
さて、前面給紙方式の給紙装置では、カセットの引出し
方向が給紙方向と直角方向になるので、カセットを引出
す時に、給紙コロにフリクションパッドが圧接したまＮ
であると、用紙が給紙コロとフリクションパッドとに挟
まれて残った場合、カセットの前方への引出しにより前
端を挟まれた用紙は破れたり、しわになって、取出して
も使用不可能な状態になったり、手で除去することが困
難な状態になる。Now, in a front paper feeding device, the direction in which the cassette is pulled out is perpendicular to the paper feeding direction, so when the cassette is pulled out, the friction pad is in pressure contact with the paper feeding roller.
If the paper remains caught between the paper feed roller and the friction pad, the paper whose front edge is caught when the cassette is pulled forward may be torn or wrinkled, making it unusable even when removed. or become difficult to remove by hand.
したがって、カセットの引出し時にはフリクションパッ
ドが給紙コロから退避することが必要である。さらに、
カセットを引出すに先立ってフリクションパッドが給紙
コロから退避していることがなお望ましい。又、カセッ
トを所定の位置にセットした時、フリクションパッドが
給紙コロに自動的に圧接するようにすることも必要であ
る。しかし、カセットを引出す過程や引出した状態では
安全の見地から電源をオフにするのが通常であり、フリ
クションパッドの給紙コロへの接離を電気的に行なうこ
とは適当でない。Therefore, it is necessary that the friction pad be retracted from the paper feed roller when the cassette is pulled out. moreover,
It is further desirable that the friction pad be retracted from the paper feed roller before pulling out the cassette. It is also necessary that the friction pad automatically come into pressure contact with the paper feed roller when the cassette is set in a predetermined position. However, in the process of pulling out the cassette or when the cassette is being pulled out, the power is usually turned off for safety reasons, and it is not appropriate to electrically connect and separate the friction pad from the sheet feeding roller.
明が解゛ しようとする 題
本発明は、前側給紙方式の画像形成装置の給紙装置の上
記の問題点にかんがみ、給紙カセットの前方への引出し
時に、電気的手段を用いることなくフリクションパッド
を給紙コロから退避させることができ、用紙が給紙コロ
とフリクションパッドとに挟まれて残ることのない給紙
装置を提供することを課題とする。SUMMARY OF THE INVENTION In view of the above-mentioned problems of the paper feeding device of a front paper feeding type image forming apparatus, the present invention eliminates friction without using electrical means when a paper feeding cassette is pulled out to the front. To provide a paper feeding device capable of retracting a pad from a paper feeding roller and preventing paper from remaining between the paper feeding roller and a friction pad.
演」１が１（９−ための手 と作用
本発明は、上記の課題を解決させるため、上記構成の前
側給紙方式の画像形成装置の給紙装置において、フリク
ションパッドの給紙コロへの押圧、解除をカセットトレ
イの装置本体所定位置への押入れ、引出し動作に連動し
て行なわせる連動機構を設けたことを特徴とする。In order to solve the above-mentioned problems, the present invention provides a paper feeding device for an image forming apparatus having the above-mentioned configuration with a front-side paper feeding method, in which a friction pad is connected to a paper feeding roller. A feature of the present invention is that an interlocking mechanism is provided for pressing and releasing the cassette tray in conjunction with the pushing and pulling operations of the cassette tray into a predetermined position of the apparatus main body.
この構成により、フリクションパッドはカセットトレイ
装置本体所定位置への押入れ、引出し動作と連動して給
紙コロに押圧され、解除される。With this configuration, the friction pad is pressed by the paper feed roller and released in conjunction with the pushing and pulling operations of the cassette tray apparatus main body into a predetermined position.
上記の連動機構は、カセットトレイの押入、引出しの際
のカセットトレイの移動により直接フリクションパッド
保持部材を動かすものの他、カセットトレイの装置本体
への押入れ、引出しに連動して加圧板を底板に対して押
圧、解除する機構と、加圧板とフリクションパッド保持
部材とを、加圧板の底板への押圧、解除に対してフリク
ションノ（ラドが給紙コロに押圧、解除されるように連
動させる部材とより構成することも゛可能である。In addition to directly moving the friction pad holding member by moving the cassette tray when the cassette tray is pushed in or pulled out, the interlocking mechanism described above moves the pressure plate against the bottom plate in conjunction with the movement of the cassette tray into or out of the device body. a mechanism for pressing and releasing the pressure plate and a friction pad holding member; It is also possible to configure more.
さらに、加圧板の底板押圧の解除をカセットトレイの引
出しに先立って行なわれる、カセットトレイの装置本体
へのロック手段の解除手段の解除動作と連動させて行な
い、加圧板とフリクションパッド保持部材とを前記の如
く連動させるようにすれば、カセットトレイの引出し移
動に先立つてフリクションパッドは給紙コロより退避し
ているので、用紙がフリクションパッドと給紙コロによ
り挟まれた状態でカセットトレイを引出すことにより発
生する事故は確実に防止される。Further, the pressing of the bottom plate of the pressure plate is released in conjunction with the release operation of the release means of the locking means of the cassette tray to the main body of the apparatus, which is performed prior to pulling out the cassette tray, and the pressure plate and the friction pad holding member are released. If they are linked as described above, the friction pad is retracted from the paper feed roller before the cassette tray is pulled out, so the cassette tray can be pulled out with the paper being sandwiched between the friction pad and the paper feed roller. Accidents caused by this will be reliably prevented.
夾施■
以下、本発明の実施例を図面に基づいて詳細に説明する
。Embodiments of the present invention will now be described in detail with reference to the drawings.
第１図は、第８図に示した給紙コロ及びフリクションパ
ッドに本発明を適用した実施例を示す図で、第８図と反
対側を見た図に相当する。フリクションパッド台１４に
はゆるやかな傾斜面を有するカム１８が固定されている
。FIG. 1 is a diagram showing an embodiment in which the present invention is applied to the paper feed roller and friction pad shown in FIG. 8, and corresponds to a view seen from the opposite side of FIG. 8. A cam 18 having a gently sloped surface is fixed to the friction pad base 14.
第２図はこの実施例の給紙カセット２と底板を下から押
圧する加圧板９及びその加圧機構を示す図である。給紙
カセット２の給紙方向前端面には、前記のカム１８に対
応してカムフォロワー１９が回転自在に設けられており
、給紙カセット２を矢印で示す方向に装置本体より水平
に移動させて引出す過程で装置本体に設けられたフリク
ションパッド台１４に固定されたカム１８に係合してこ
れ＝８−
を押下げ、フリクションパッド１３を給紙コロ１１から
離間させる。FIG. 2 is a diagram showing the pressure plate 9 that presses the paper feed cassette 2 and the bottom plate from below and its pressure mechanism in this embodiment. A cam follower 19 is rotatably provided on the front end surface of the paper feed cassette 2 in the paper feeding direction in correspondence with the cam 18, and the paper feed cassette 2 is moved horizontally from the main body of the apparatus in the direction shown by the arrow. In the process of pulling it out, it engages with a cam 18 fixed to a friction pad stand 14 provided on the main body of the apparatus and pushes down the cam 18, thereby separating the friction pad 13 from the paper feed roller 11.
給紙カセット２の引出し方向奥側の壁には図に示す如く
後方に向ってブラケット２０が突設されており、その先
端にはコロ２１が設けられて１）る。As shown in the figure, a bracket 20 is provided on the back wall of the paper feed cassette 2 in the drawing direction, projecting rearward, and a roller 21 is provided at the tip of the bracket 20 (1).
このコロ２″１は、給紙カセット２を装置内の所定のセ
ット位置にセットされた状態で、図中に破線で示す如く
、装置本体後側板２２に中央を回動自在に取付けられた
レバー２３の一端から前方に延設されたカム部２４に係
合して押し下げ、レノクー２３を破線で示す位置に回動
させ、その右端付近上縁が装置本体後側板２２に立設さ
れたストツノク２５に当接して位置決めされる。レノ＜
−２３の右端と、加圧板９の軸８の一端に設けられたレ
ノヘー２６との間には引張りばね２７が張架され、レノ
く−２３のカム２４がコロ２１に押下げられ、レノベー
２３の右端がストッパ２５に係合した状態でばね２７の
力により加圧板９は給紙カセット２内の底板１０を押上
げ、その上に載置された図示しない用紙束の上面の給紙
方向前端部を給紙コロに圧接させるようになっている。When the paper feed cassette 2 is set at a predetermined setting position in the apparatus, this roller 2''1 is attached to a lever rotatably attached to the rear side plate 22 of the apparatus main body, as shown by the broken line in the figure. The cam part 24 extending forward from one end of the 23 is engaged with and pushed down, and the cam part 23 is rotated to the position shown by the broken line. It is positioned by coming into contact with the Leno<
A tension spring 27 is stretched between the right end of the lever 23 and the lever 26 provided at one end of the shaft 8 of the pressure plate 9, and the cam 24 of the lever 23 is pushed down by the roller 21, and With the right end engaged with the stopper 25, the pressure plate 9 pushes up the bottom plate 10 in the paper feed cassette 2 by the force of the spring 27, and the front end in the paper feed direction of the upper surface of the stack of paper (not shown) placed thereon. The section is pressed against the paper feed roller.
給紙カセット２を手前側に引出すと、先づカムフォロワ
ー１９がフリクションパッド台１４のカム１８を押下げ
て、フリクションパッドを給紙コロ１１から離間させ１
、概ね同時にコロ２１がカム２４から退避し、レバー２
３がばね２７の張力及びレバー２６、加圧板９の自重に
より時計方向に回動して実線で示す位置になり、加圧板
９の底板１０に対する押圧力は解除される。When the paper feed cassette 2 is pulled out to the front side, the cam follower 19 first pushes down the cam 18 of the friction pad stand 14 to separate the friction pad from the paper feed roller 11.
, the roller 21 retreats from the cam 24 at approximately the same time, and the lever 2
3 is rotated clockwise by the tension of the spring 27 and the weight of the lever 26 and the pressure plate 9 to the position shown by the solid line, and the pressing force of the pressure plate 9 against the bottom plate 10 is released.
第３図は、フリクションパッド１３を給紙コロ１１から
離間させる他の機構の実施例を示すものである。この実
施例では、加圧板９に一体的に爪３０を設け、この爪を
フリクションパッド台１４に設けた係止部３１に係止し
、加圧板９が下方に回動すればフリクションパッド台１
４も下方に下ってフリクションパッド１３が給紙コロ１
１から離れ、加圧板９が底板１０を押圧する位置に上昇
すればフリクションパッド台１４も上昇してフリクショ
ンパッド１３が給紙コロ１１に圧接するようになってい
る。加圧板９の底板１０に対する加圧、解除の機構は例
えば第２図で説明した機構が採用され、給紙カセット２
の引出し、押入れに連動して加圧板９の加圧、解除が行
なわれ、それと同時にフリクションパッドの加圧、解除
も行なわれる。FIG. 3 shows an embodiment of another mechanism for separating the friction pad 13 from the paper feed roller 11. In this embodiment, a claw 30 is integrally provided on the pressure plate 9, and this claw is engaged with a locking portion 31 provided on the friction pad base 14, so that when the pressure plate 9 rotates downward, the friction pad base 14
4 also moves downward, and the friction pad 13 touches the paper feed roller 1.
1 and rises to a position where the pressure plate 9 presses the bottom plate 10, the friction pad stand 14 also rises and the friction pad 13 comes into pressure contact with the paper feed roller 11. For example, the mechanism explained in FIG.
The pressure plate 9 is pressurized and released in conjunction with the pulling out and pushing in, and at the same time, the friction pad is also pressurized and released.
以上説明した各実施例で、フリクションパッド１３が給
紙コロ１１から退避し、これらに先端部を挟持された用
紙が自由になり、加圧板９による底板１０の押圧が解除
され、用紙束が下降すると、給紙コロ１１とフリクショ
ンパッド１３との間に先端があった用紙は位置が下った
用紙束の上に自重で滑り落ち、給紙カセットを引出した
場合、用紙が給紙コロとフリクションパッドとの間に挟
まれて残ることは防止される。In each of the embodiments described above, the friction pad 13 retreats from the paper feed roller 11, the paper whose leading end is held between them becomes free, the pressure on the bottom plate 10 by the pressure plate 9 is released, and the paper stack descends. Then, the paper whose leading edge was between the paper feed roller 11 and the friction pad 13 slides down onto the stack of paper whose position has been lowered due to its own weight, and when the paper feed cassette is pulled out, the paper moves between the paper feed roller 11 and the friction pad 13. This prevents them from remaining sandwiched between the two.
しかし、給紙カセットの引出し開始後、フリクションパ
ッド及び加圧板の解除迄に時間差がかなりある場合は、
給紙コロとフリクションパッドとに用紙先端が挟持され
、かつ用紙束の上面が給紙コロに圧接した状態で給紙カ
セットが引出され、又、加圧板が給紙カセットに引掛る
ことになり好ましくない。However, if there is a considerable time difference between when the paper cassette starts to be pulled out and when the friction pad and pressure plate are released,
Preferably, the paper feed cassette is pulled out with the leading edge of the paper sandwiched between the paper feed roller and the friction pad, and the top surface of the paper bundle is pressed against the paper feed roller, and the pressure plate is caught on the paper feed cassette. do not have.
そこで、給紙カセットの引出しに先立って、加圧板及び
フリクションパッドの解除が完了しているようにするこ
とが望ましい。Therefore, it is desirable to complete the release of the pressure plate and the friction pad before pulling out the paper feed cassette.
第４図は、これを可能とする実施例の要部を示すもので
ある。この図には示されていないが、加圧板９を作動さ
せるカム２４、レバー２３、引張りばね２７、レバー２
６、軸８は第２図に示した機構と同じであり、又フリク
ションパッドの加圧、解除の機構は第３図に示したもの
と同じである。FIG. 4 shows the main parts of an embodiment that makes this possible. Although not shown in this figure, the cam 24 that operates the pressure plate 9, the lever 23, the tension spring 27, and the lever 2
6. The shaft 8 is the same as the mechanism shown in FIG. 2, and the mechanism for pressurizing and releasing the friction pad is the same as that shown in FIG.
しかし、この実施例では、カム２４に係合するコロ２１
を先端に支持するブラケット２０は板ばねで作られてお
り、その側面を押圧することにより、図中に破線で示す
如く、弾性変形し、給紙カセットが所定の位置にセット
された状態でも、コロ２１とカム２４との係合が外れる
ようになっている。However, in this embodiment, the roller 21 that engages the cam 24
The bracket 20 that supports the paper feed cassette at its tip is made of a leaf spring, and when its side surface is pressed, it is elastically deformed as shown by the broken line in the figure, and even when the paper feed cassette is set in the specified position, The engagement between the roller 21 and the cam 24 is disengaged.
給紙カセット２を引出す取手３の内側には、給紙カセッ
ト２を装置本体の所定のセット位置にロックするロック
爪３４を外すための内板３３が設けられている。給紙カ
セット２の側面にはロック爪３４と連動するリンク３５
．３６が設けられており、さらに、給紙カセット２の後
面には、リンク３６に連動して前記の板ばね製ブラケッ
ト２０の側面を押圧、離脱可能なリンク３７が設けられ
ており、通常時は、弱い引張りばね３８によりリンク３
７はブラケット２０の側面より離れた位置に保持されて
いる。給紙カセット２の引出しに先立って内板３３を指
で手前に引けばロック爪３４が外れると同時に、リンク
３５．３６を介してリンク３７は引張りばね３８のばね
力に抗してブラケット２０の側面を押圧する方向に移動
し、ブラケット２０は破線で示す如く弾性変形し、第２
図に示すカム２４との係合が外れ、直ちに加圧板９及び
フリクションパッド１３は夫々底板１０及び給紙コロ１
１から退避する。ロック爪３４が外れた後はリンクは通
常の位置に戻すコロ２１は元の位置に戻るので、給紙カ
セットを押入れる際はコロ２１はカム２４に係合し、加
圧板９は底板１０を押上げ、フリクションパッド１３は
給紙コロ１１に圧接し、正常な給紙が行なわれる。On the inside of the handle 3 for pulling out the paper feed cassette 2, an inner plate 33 is provided for removing a lock claw 34 that locks the paper feed cassette 2 in a predetermined set position in the main body of the apparatus. On the side of the paper feed cassette 2, there is a link 35 that interlocks with the lock claw 34.
．． Further, a link 37 is provided on the rear surface of the paper feed cassette 2 and can be moved in conjunction with the link 36 to press the side surface of the plate spring bracket 20 and be removed. , link 3 by weak tension spring 38
7 is held at a position away from the side surface of the bracket 20. If you pull the inner plate 33 forward with your fingers before pulling out the paper feed cassette 2, the lock claw 34 will be released, and at the same time, the link 37 will be moved against the spring force of the tension spring 38 via the links 35 and 36 to release the bracket 20. The bracket 20 moves in the direction of pressing the side surface, and the bracket 20 is elastically deformed as shown by the broken line, and the second
Immediately after disengaging from the cam 24 shown in the figure, the pressure plate 9 and the friction pad 13 are moved to the bottom plate 10 and paper feed roller 1, respectively.
Evacuate from 1. After the lock claw 34 is released, the link returns to its normal position.The roller 21 returns to its original position, so when pushing in the paper feed cassette, the roller 21 engages with the cam 24, and the pressure plate 9 presses the bottom plate 10. When pushed up, the friction pad 13 comes into pressure contact with the paper feeding roller 11, and normal paper feeding is performed.
この実施例における給紙カセットロック外し、加圧板及
びフリクションパッドの解除、給紙カセットの引出し、
押込み、加圧板及びフリクションパッドの加圧の一連の
、動作フローを第５図に示す。In this embodiment, the paper feed cassette is unlocked, the pressure plate and friction pad are released, the paper feed cassette is pulled out,
FIG. 5 shows a series of operation flows of pushing and applying pressure to the pressure plate and friction pad.
本発明の装置では、加圧板、フリクションパッドの解除
、加圧は電気力を使用せず、給紙カセットの引出し、押
入れ又はロック外し等の手動操作と連動して機械的に行
なわれるので、安全性の見地から給紙カセットが少しで
も所定のセット位置より引出された位置に移動すれば装
置の電源が予熱スイッチ状態に切換えられるようにする
のがよしＡｏ
羞□釆
以」二の如く５本発明によれば、簡単な機構で電力を使
用することなく、給紙カセットの引出し押入れ動作と連
動して加圧板及びフリクションパラ１くの解除、加圧を
行なうことができる。特に給紙カセットの引出しに先立
って行なわれるロック外し動作に連動させて加圧板及び
フリクションパッドの解除咎行なうことにより、用紙や
加圧板が給紙カセットに引掛る等の事故を完全に回避す
ることが可能となる。In the device of the present invention, the release and pressurization of the pressure plate and friction pad are performed mechanically without using electric power, and in conjunction with manual operations such as pulling out, pushing in, or unlocking the paper feed cassette, so it is safe. From a safety standpoint, it is better to switch the power supply of the device to the preheating switch state if the paper cassette moves even slightly from the predetermined setting position to a position that is pulled out. According to the invention, the pressure plate and the friction plate 1 can be released and pressurized in conjunction with the pull-out/push-in operation of the paper feed cassette with a simple mechanism and without using electric power. In particular, by releasing the pressure plate and friction pad in conjunction with the unlocking operation performed prior to pulling out the paper feed cassette, accidents such as paper or pressure plate getting caught in the paper feed cassette can be completely avoided. becomes possible.
第１図は本発明の実施例のフリクションパッドを給紙コ
ロに圧接、解除する手段の一例を示す斜視図、第２図は
上記実施例のカムと係合するカムフォロワ及び底板加圧
板の加圧、解除機構の一例を示す斜視図、第３図はフリ
クションパッドを給紙コロに圧接、解除する手段の他の
実施例を示す斜視図、第４図は給紙カセットのロック外
しと連動して加圧板及びフリクションパッドを解除する
ようにした実施例の機構の一部を示す斜視図、第５図は
この実施例の動作のフローを示すフローチャート、第６
図は前側給紙方式の複写機の一例のの外観を示す斜視図
、第７図はフリクションパッド方式の給紙分離装置の構
成を示す断面図、第８図はそのフリクションパッドの接
離機構を示す斜視図である。
２・・・給紙カセット（カセットトレイ）７・・・用紙
束 ８・・・加圧板軸９・・加圧板
１０・・・底板１１・・給紙コロ １３・
・・フリクションパット１４・・・フリクションバット
台
１８・・・カム １９・・カムフォロワー２
０・・・ブラケット ２１・・コロ２３・・・レバ
ー ２４・・・カム２５ ストッパ ２
６・・・レバー３０．３１・・・係止部 ３３・・内
板３４・・ロック爪 ３５，３６．３７・・・リ
ンク３８・・引張りばね
第２図FIG. 1 is a perspective view showing an example of a means for pressing and releasing the friction pad from the paper feed roller according to the embodiment of the present invention, and FIG. 2 is a cam follower that engages with the cam of the above embodiment and pressurizing the bottom plate pressure plate. , a perspective view showing an example of a release mechanism, FIG. 3 is a perspective view showing another embodiment of means for pressuring and releasing the friction pad against the paper feed roller, and FIG. FIG. 5 is a perspective view showing a part of the mechanism of the embodiment in which the pressure plate and the friction pad are released; FIG. 5 is a flowchart showing the operation flow of this embodiment; FIG.
The figure is a perspective view showing the external appearance of an example of a copying machine with a front paper feeding method, FIG. 7 is a sectional view showing the configuration of a friction pad type paper feeding and separating device, and FIG. 8 is a diagram showing the approach and separation mechanism of the friction pad. FIG. 2... Paper feed cassette (cassette tray) 7... Paper stack 8... Pressure plate shaft 9... Pressure plate
10...Bottom plate 11...Paper feed roller 13.
... Friction pad 14 ... Friction butt stand 18 ... Cam 19 ... Cam follower 2
0... Bracket 21... Roller 23... Lever 24... Cam 25 Stopper 2
6...Lever 30.31...Locking part 33...Inner plate 34...Lock claw 35, 36.37...Link 38...Tension spring Fig. 2
Claims (3)
り押し入れて所定の位置に脱着可能で、底部に用紙束を
載置する可動底板を有するカセットトレイと、上記所定
の位置に装着されたカセットトレイの上記底板を押圧、
解除可能な加圧板と、該加圧板で上方に押圧された上記
底板に載置された用紙束の上面前端部に圧接する給紙コ
ロと、用紙束前端より給紙方向前方で該給紙コロ下部に
圧接、解除可能なフリクションパッドとを有し、上記給
紙コロにより用紙束の上から順次送り出された用紙の重
送を上記フリクションパッドにより分離して１枚ずつ給
紙する前側給紙方式の画像形成装置の給紙装置において
、 上記フリクションパッドの給紙コロへの押圧、解除をカ
セットトレイの装置本体所定位置への押入れ、引出し動
作に連動して行なわせる連動機構を設けたことを特徴と
する給紙装置。(1) A cassette tray that can be pulled out from the front side of the image forming apparatus main body, pushed in from the front side, and detached to a predetermined position, and has a movable bottom plate on the bottom for placing a stack of paper, and a cassette tray that is attached to the above predetermined position. Press the bottom plate of the cassette tray,
a releasable pressure plate; a paper feed roller that presses against the front end of the upper surface of the paper bundle placed on the bottom plate that is pressed upward by the pressure plate; A front-side paper feeding system that has a friction pad at the bottom that can be press-contacted and released, and that the friction pad separates the double feed of paper that is sequentially sent out from the top of the paper stack by the paper feed roller and feeds the paper one by one. The paper feeding device of the image forming apparatus is characterized by being provided with an interlocking mechanism that presses and releases the friction pad against the paper feeding roller in conjunction with the pushing and pulling of the cassette tray into a predetermined position in the device body. Paper feeding device.
押入れ、本体からの引出しに連動して上記加圧板を上記
底板に対して押圧、解除する機構と、上記の加圧板とフ
リクションパッド保持部材とを、加圧板の底板押圧、解
除に対応してフリクションパッドが給紙コロを押圧、解
除する如く連動させる部材とを有することを特徴とする
請求項１に記載の給紙装置。(2) The above-mentioned interlocking mechanism includes a mechanism that presses and releases the pressure plate against the bottom plate in conjunction with pushing the cassette tray into and pulling it out from the main body, and the pressure plate and friction pad holding member. 2. The paper feeding device according to claim 1, further comprising a member that interlocks the friction pad to press and release the paper feeding roller in response to pressing and releasing of the bottom plate of the pressure plate.
装置本体内のセット位置にロックするためのロック手段
を解除する手段と、その解除動作に連動して上記加圧板
の上記底板への押圧を解除する機構と、上記の加圧板と
フリクションパッド保持部材とを加圧板の底板押圧、解
除に対応してフリクションパッドが給紙コロを押圧、解
除する如く連動させる部材とを有することを特徴とする
請求項１に記載の給紙装置。(3) The interlocking mechanism includes a means for releasing a locking means for locking the cassette tray at a set position in the apparatus main body, and a means for pressing the pressure plate against the bottom plate in conjunction with the release operation. and a member for interlocking the pressure plate and the friction pad holding member so that the friction pad presses and releases the paper feed roller in response to pressing and release of the bottom plate of the pressure plate. The paper feeding device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1091855A JP2878303B2 (en) | 1989-04-13 | 1989-04-13 | Paper feeder of image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1091855A JP2878303B2 (en) | 1989-04-13 | 1989-04-13 | Paper feeder of image forming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02270737A true JPH02270737A (en) | 1990-11-05 |
| JP2878303B2 JP2878303B2 (en) | 1999-04-05 |
Family
ID=14038175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1091855A Expired - Fee Related JP2878303B2 (en) | 1989-04-13 | 1989-04-13 | Paper feeder of image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2878303B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0388632A (en) * | 1989-08-30 | 1991-04-15 | Toshiba Corp | Sheet feeder and image forming device |
| JPH0398923A (en) * | 1989-09-13 | 1991-04-24 | Toshiba Corp | Paper feeding device and picture-image formation device |
| CN112774776A (en) * | 2021-01-27 | 2021-05-11 | 付智忠 | Medicine pounding device for medical modulation external application preparation |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6141960A (en) * | 1984-08-03 | 1986-02-28 | Ngk Spark Plug Co Ltd | Air fuel ratio detecting device |
-
1989
- 1989-04-13 JP JP1091855A patent/JP2878303B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6141960A (en) * | 1984-08-03 | 1986-02-28 | Ngk Spark Plug Co Ltd | Air fuel ratio detecting device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0388632A (en) * | 1989-08-30 | 1991-04-15 | Toshiba Corp | Sheet feeder and image forming device |
| JPH0398923A (en) * | 1989-09-13 | 1991-04-24 | Toshiba Corp | Paper feeding device and picture-image formation device |
| JP2774606B2 (en) * | 1989-09-13 | 1998-07-09 | 株式会社東芝 | Paper feeder |
| CN112774776A (en) * | 2021-01-27 | 2021-05-11 | 付智忠 | Medicine pounding device for medical modulation external application preparation |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2878303B2 (en) | 1999-04-05 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |