JPH0518342Y2 - - Google Patents
Info
- Publication number
- JPH0518342Y2 JPH0518342Y2 JP13867986U JP13867986U JPH0518342Y2 JP H0518342 Y2 JPH0518342 Y2 JP H0518342Y2 JP 13867986 U JP13867986 U JP 13867986U JP 13867986 U JP13867986 U JP 13867986U JP H0518342 Y2 JPH0518342 Y2 JP H0518342Y2
- Authority
- JP
- Japan
- Prior art keywords
- paper feed
- paper
- roller
- frame
- contact
- 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.)
- Expired - Lifetime
Links
- 238000000926 separation method Methods 0.000 claims description 67
- 238000001514 detection method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Landscapes
- Sheets, Magazines, And Separation Thereof (AREA)
Description
【考案の詳細な説明】
(1) 技術分野
この考案は給紙装置における分離圧解除機構に
関するものである。[Detailed description of the invention] (1) Technical field This invention relates to a separation pressure release mechanism in a paper feeder.
(2) 従来技術
この種の給紙装置として、互いに連動して給紙
方向に回転可能な分離ローラと給紙ローラとを、
給紙ローラが昇降可能な給紙台上に載置した用紙
に接し、かつ分離ローラが用紙の先端と接しない
位置となるように設け、前記分離ローラに付勢部
材によつて下方から圧接して分離圧を発生させる
分離部材を設けたものがある。(2) Prior art This type of paper feeding device uses a separation roller and a paper feeding roller that are rotatable in the paper feeding direction in conjunction with each other.
The paper feed roller is provided so as to be in contact with the paper placed on a paper feed tray that can be raised and lowered, and the separation roller is provided at a position not in contact with the leading edge of the paper, and is pressed against the separation roller from below by a biasing member. Some devices are equipped with a separation member that generates separation pressure.
前記のような給紙装置において従来用いられて
いる分離圧解除機構は、給紙ジヤム等が発生した
とき、電磁ソレノイドに通電させて分離ローラと
圧接している分離部材を強制的に下方に下げた
り、あるいはレバーなどでマニユアル的に分離ロ
ーラと圧接している分離部材を下方に下げたりし
て、分離圧を解除するものである。 The separation pressure release mechanism conventionally used in the above-mentioned paper feed devices is such that when a paper feed jam occurs, an electromagnetic solenoid is energized to forcibly lower the separation member that is in pressure contact with the separation roller. Alternatively, the separation pressure is released by manually lowering the separation member that is in pressure contact with the separation roller using a lever or the like.
しかしながら、従来の前記分離圧解除機構は、
給紙台が下降した状態にある非給紙時でも分離圧
が作用したままであるので、給紙装置を長期間使
用しない状態におくと、分離ローラや分離部材が
変形してしまうという欠点があり、また機構も複
雑となつてしまう等、種々の欠点があつた。 However, the conventional separation pressure release mechanism
Even when the paper feed tray is in a lowered state and the paper is not being fed, the separation pressure remains in effect, so if the paper feed device is left unused for a long period of time, the separation rollers and separation members may become deformed. However, it also had various drawbacks, such as a complicated mechanism.
(3) 目的
この考案は上記従来のもののもつ欠点を排除
し、給紙台が下降した非給紙時には分離圧を解除
できて、分離ローラや分離部材が変形するのを防
止でき、しかも機構の簡単な給紙装置における分
離圧解除機構を提供することを目的とする。(3) Purpose This invention eliminates the drawbacks of the conventional methods described above, and can release the separation pressure when the paper feed table is lowered and not feeding paper, prevent the separation rollers and separation members from deforming, and moreover, improve the mechanism. It is an object of the present invention to provide a separation pressure release mechanism in a simple paper feeding device.
(4) 構成
前記目的を達成するため、この考案の分離圧解
除機構は、互いに連動して給紙方向に回転可能な
上分離ローラと給紙ローラとを、給紙ローラが昇
降可能な給紙台上に載置した用紙に接し、かつ上
分離ローラが給紙台上に載置した用紙の先端と接
しない位置となるように設け、前記上分離ローラ
にばねによつて下方から圧接して分離圧を発生さ
せる下分離ローラを設けた給紙装置において、前
記上分離ローラと給紙ローラはその回転軸がフレ
ームに回転可能に支持され、このフレームはフレ
ームを貫通して機枠に支持された上分離ローラの
回転軸を支点として揺動可能となつており、また
前記下分離ローラは機枠に揺動可能に支持された
受レバーに回転可能に支持され、前記フレームに
は下向突片が設けられていて、この下向突片は給
紙台が給紙高さにあり、給紙ローラが給紙台上の
用紙と接した状態では、前記受レバーとの間に〓
間が形成されて、下分離ローラを上分離ローラに
圧接させ、給紙台が下降して給紙ローラが給紙台
上の用紙と接しなくなつた状態では、フレームと
ともに下動して前記受レバーに当接し、これを下
方に揺動することによつて、下分離ローラの上分
離ローラへの圧接を解除することを特徴とするも
のである。(4) Configuration In order to achieve the above object, the separation pressure release mechanism of this invention combines an upper separation roller and a paper feed roller that can rotate in the paper feeding direction in conjunction with each other, and a paper feed roller that can move up and down. The upper separation roller is provided in a position where it is in contact with the paper placed on the table and does not touch the leading edge of the paper placed on the paper feed table, and is pressed against the upper separation roller from below by a spring. In a paper feeding device provided with a lower separation roller that generates separation pressure, the rotation shafts of the upper separation roller and the paper feeding roller are rotatably supported by a frame, and the frame is supported by a machine frame passing through the frame. The lower separation roller is rotatably supported by a receiving lever that is swingably supported on the machine frame, and the frame has a downward projection. When the paper feed tray is at the paper feeding height and the paper feed roller is in contact with the paper on the paper feed tray, this downward protruding piece is located between the receiving lever and the paper feed roller.
When a gap is formed and the lower separation roller is brought into pressure contact with the upper separation roller, and the paper feed table is lowered and the paper feed roller is no longer in contact with the paper on the paper feed table, the paper feed roller moves down together with the frame and the above-mentioned receiver moves down together with the frame. The device is characterized in that the pressure contact between the lower separation roller and the upper separation roller is released by contacting the lever and swinging the lever downward.
以下、この考案の一実施例を図面を参照して説
明する。 An embodiment of this invention will be described below with reference to the drawings.
この実施例は印刷機に適用したものである。第
１図において１は印刷用紙２を多数枚、積み重ね
て載置した昇降可能な給紙台で、この給紙台１の
上方には給紙方向に回転可能な上分離ローラ４と
給紙ローラ５が、その回転軸４ａ，５ａの両端を
方形フレーム７で回転可能に支持されて配置され
ている。フレーム７は適度な重さを有していて、
フレーム７を貫通して図示しない機枠に支持され
た上分離ローラ４の軸４ａを支点として上下に揺
動可能となつているとともに、給紙ローラ５側の
端部がばね８で吊り下げられている。フレーム７
で支持された上分離ローラ４と給紙ローラ５は、
両軸４ａ，５ａ間に巻掛けられた無端ベルト等を
介して互いに連動可能となつており、かつ給紙台
１が給紙高さにある第１図の状態では給紙ローラ
５が最上位の印刷用紙２に接し、上分離ローラ４
が該用紙２の先端と接しない位置となるようにな
つている。 This embodiment is applied to a printing press. In FIG. 1, reference numeral 1 denotes a paper feed tray that can be raised and lowered on which a large number of sheets of printing paper 2 are stacked. 5 is rotatably supported by a rectangular frame 7 at both ends of its rotating shafts 4a, 5a. The frame 7 has a moderate weight,
The upper separation roller 4, which passes through the frame 7 and is supported by a machine frame (not shown), can swing up and down about a shaft 4a as a fulcrum, and the end on the paper feed roller 5 side is suspended by a spring 8. ing. frame 7
The upper separation roller 4 and paper feed roller 5 supported by
Both shafts 4a and 5a can be interlocked with each other via an endless belt or the like wrapped around them, and in the state shown in FIG. is in contact with the printing paper 2, and the upper separation roller 4
is located at a position that does not touch the leading edge of the paper 2.
上分離ローラ４には給紙方向と反対方向に回転
可能な小径の下分離ローラ１０が下方から圧接さ
れている。下分離ローラ１０の回転軸１０ａの両
端は左右（図示では前後方向）１対のＬ形受レバ
ー１１の横向片１２に回転可能に支持されてい
る。受レバー１１は中間部が枢軸１３を介して回
動可能に枢支され、かつ縦向片１４の端部には枢
軸１３を支点として受レバー１１の横向片１２を
上向きに回動付勢し、下分離ローラ１０を上分離
ローラ４に圧接させ、所定の分離圧を発生させる
ばね１６が配設されている。 A small-diameter lower separation roller 10 rotatable in a direction opposite to the paper feeding direction is pressed into contact with the upper separation roller 4 from below. Both ends of the rotating shaft 10a of the lower separation roller 10 are rotatably supported by horizontal pieces 12 of a pair of L-shaped receiving levers 11 on the left and right (in the front and rear directions in the figure). The receiving lever 11 has an intermediate portion rotatably supported via a pivot 13, and an end portion of the vertical piece 14 has a horizontal piece 12 of the receiving lever 11 pivoted upward about the pivot 13. , a spring 16 is provided that presses the lower separation roller 10 against the upper separation roller 4 and generates a predetermined separation pressure.
一方、１対の受レバー１１の横向片１２とそれ
ぞれ対向するフレーム７の下縁には下向きの突片
１８が設けられている。この突片１８は給紙台１
が給紙高さにあつて、給紙ローラ５が印刷用紙２
と接した状態で受レバー１１の横向片１２と〓間
２０が形成されるようになつているとともに、給
紙台１が給紙高さから下降して、給紙ローラ５が
印刷用紙２と接しなくなつた状態で、フレーム７
がその自重によりばね８の力に抗して下方に揺動
することにより、受レバー１１の横向片１２に当
接するようになつている。 On the other hand, downward protruding pieces 18 are provided on the lower edges of the frame 7, which respectively face the horizontal pieces 12 of the pair of receiving levers 11. This protruding piece 18 is
is at the paper feed height, and the paper feed roller 5 is at the printing paper 2
A gap 20 is formed between the horizontal piece 12 of the receiving lever 11 and the paper feed tray 1 when the tray is in contact with the printing paper 2 . In the state where they are no longer in contact, frame 7
The lever swings downward due to its own weight against the force of the spring 8, and comes into contact with the horizontal piece 12 of the receiver lever 11.
尚、２１は機枠（給紙装置本体）側に設けられ
た前面板で、前面板２１には給紙台１上の印刷用
紙２の先端が当つて位置決めされるようになつて
いる。 Reference numeral 21 denotes a front plate provided on the side of the machine frame (paper feeder main body), and the leading edge of the printing paper 2 on the paper feed tray 1 comes into contact with the front plate 21 to be positioned.
前記実施例の作用を説明する。 The operation of the above embodiment will be explained.
給紙台１が給紙高さにある第１図の状態で、給
紙ジヤム等の不具合が発生すると、図示しないセ
ンサーがこれを検知し、この検知信号を受ける制
御装置（図示省略）の出力信号によつて給紙台１
は一定量下降される。給紙台１が下降すると、第
２図に示すようにフレーム７はばね８の力に抗し
て自重で下がり、フレーム７に設けた突片１８が
受レバー１１の横向片１２をばね１６の力に抗し
て押し下げる。この横向片１２の押し下げによ
り、横向片１２に設けた下分離ローラ１０が上分
離ローラ４から離間し、下分離ローラ１０の上分
離ローラ４への圧接が解除される。そして、両ロ
ーラ１０，４の離間により、両ローラ間に〓間が
できるため、ジヤム紙はこの〓間を利用して取除
かれる。 If a malfunction such as a paper jam occurs in the state shown in Fig. 1, where the paper feed table 1 is at the paper feed height, a sensor (not shown) detects this, and a control device (not shown) that receives this detection signal outputs an output. Paper feed tray 1 depending on the signal
is lowered by a certain amount. When the paper feed tray 1 is lowered, the frame 7 is lowered by its own weight against the force of the spring 8 as shown in FIG. Push down against the force. By pushing down the horizontal piece 12, the lower separation roller 10 provided on the horizontal piece 12 is separated from the upper separation roller 4, and the pressure contact of the lower separation roller 10 to the upper separation roller 4 is released. Since the two rollers 10 and 4 are separated, a gap is created between the two rollers, and the jam paper is removed using this gap.
また、紙給台１が下降限位置まで下降される非
給紙時でも、下分離ローラ１０の上分離ローラ４
への圧接は前記のように解除され、換言すると、
分離圧は解除されたままなので、長期的に印刷機
を使用しない場合でも分離ローラ１０，４の変形
は防止される。 In addition, even when the paper feed table 1 is not fed when it is lowered to the lowering limit position, the upper separation roller 4 of the lower separation roller 10
The pressure on is released as described above, in other words:
Since the separation pressure remains released, deformation of the separation rollers 10 and 4 is prevented even when the printing press is not used for a long period of time.
第３，４図には給紙台１の自動間欠上昇機構が
示されている。すなわち、給紙台１の一端部両側
には縦向ラツク２４が形成されたガイド板２５が
固定され、ガイド板２５には機枠側のガイドピン
２６とスライド可能に係合するガイド溝２７が形
成されている。ラツク２４にはウオームホイール
２８と同軸上で一体となつたピニオン２９が噛合
され、かつウオームホイール２８は駆動モータ３
０の回転軸に設けたウオーム３１と噛合されてい
る。 3 and 4 show an automatic intermittent lifting mechanism for the paper feed tray 1. That is, a guide plate 25 on which a vertical rack 24 is formed is fixed to both sides of one end of the paper feed tray 1, and the guide plate 25 has a guide groove 27 that slidably engages with a guide pin 26 on the machine frame side. It is formed. A pinion 29 coaxially integrated with a worm wheel 28 is meshed with the rack 24, and the worm wheel 28 is connected to the drive motor 3.
It is meshed with a worm 31 provided on the rotating shaft of 0.
給紙台１の上方には給紙ローラ５′が、その回
転軸５′ａの両端をレバー３３で回転可能に支持
され、かつ最上位の印刷用紙２と接して配設され
ている。レバー３３は一端側に設けた軸３４を支
点として上下に揺動可能となつているとともに、
他端側がばね３５で吊り下げられている。３７は
給紙ローラ５′の高さ検知用フオトインタラプタ
で、給紙台１が給紙高さにある状態で、レバー３
３の一部（上縁部）が光路を閉じる位置に設置さ
れている。 A paper feed roller 5' is rotatably supported by levers 33 at both ends of its rotating shaft 5'a, and is disposed above the paper feed tray 1 in contact with the uppermost printing paper 2. The lever 33 can swing up and down using a shaft 34 provided at one end as a fulcrum, and
The other end is suspended by a spring 35. 37 is a photo interrupter for detecting the height of the paper feed roller 5', and when the paper feed tray 1 is at the paper feed height, the lever 3
3 (upper edge) is installed at a position that closes the optical path.
前記において、給紙台１上の印刷用紙２が給紙
ローラ５′の回転駆動により次々と送り出される
と、給紙台１に積み重ねられた印刷用紙２が少く
なつて給紙ローラ５′が下降し、これに伴なつて
レバー３３が軸３４を支点として下方に揺動す
る。これにより、それまで閉じていたフオトイン
タラプタ３７の光路が開き、給紙ローラ５′の高
さが不足していることを検知するとともに、該検
知信号を図示しない制御装置に出力する。そし
て、この制御装置からは駆動モータ３０へ上昇指
令信号が出力され、これによつて図示しないリレ
ー等が動作してモータ３０が回転駆動される（第
４図）。モータ３０が駆動されると、ウオーム３
１、ウオームホイール２８、ピニオン２９、ラツ
ク２４を経てガイド板２５が、ガイドピン２６、
ガイド溝２７を介して上方に移動され、給紙台１
は上昇される。給紙台１の上昇によつて、給紙ロ
ーラ５′が持ち上げられ、レバー３３が上方に揺
動してフオトインタラプタ３７の光路が再び閉じ
られると、給紙ローラ５′の高さ不足が解消し、
検知信号の出力が停止するとともに、上昇指令信
号も解除されるため、モータ３０の回転駆動が停
止する。前記の作動を繰り返すことにより、給紙
台１の間欠的な上昇が行なわれることになる。 In the above, when the printing paper 2 on the paper feed tray 1 is sent out one after another by the rotational drive of the paper feed roller 5', the number of printing papers 2 stacked on the paper feed tray 1 decreases and the paper feed roller 5' is lowered. Accordingly, the lever 33 swings downward about the shaft 34 as a fulcrum. As a result, the optical path of the photo interrupter 37, which had been closed until then, opens, detects that the height of the paper feed roller 5' is insufficient, and outputs the detection signal to a control device (not shown). A rise command signal is output from this control device to the drive motor 30, which causes a relay (not shown) or the like to operate and drive the motor 30 to rotate (FIG. 4). When the motor 30 is driven, the worm 3
1. The guide plate 25 passes through the worm wheel 28, pinion 29, and rack 24, and then the guide pin 26,
It is moved upward through the guide groove 27 and the paper feed tray 1
is raised. As the paper feed tray 1 rises, the paper feed roller 5' is lifted, and the lever 33 swings upward to close the optical path of the photo interrupter 37 again, resolving the insufficient height of the paper feed roller 5'. death,
Since the output of the detection signal is stopped and the ascending command signal is also canceled, the rotational drive of the motor 30 is stopped. By repeating the above-mentioned operation, the paper feed table 1 is raised intermittently.
なお、モータ３０の上昇起動時には、リレーの
遅れ時間tdや、負荷系の慣性等による遅れがあ
り、上昇指令信号のパルス巾が第５図のt1のよう
に小さい場合、給紙台１が十分に上昇できない
が、前記においてはパルス巾をｔのように大きく
とつているため、仮りに給紙ローラ５′の振動等
による細いパルスが給紙ローラ５′の高さ検知信
号として入つてきても、給紙台１を十分に上昇さ
せることが可能である。したがつて、印刷用紙２
を数枚給紙する間は給紙ローラ５′の振動の影響
を受けず、給紙数枚につき１回の間欠上昇が実現
可能となる。 Note that when the motor 30 is started to rise, there is a delay due to the delay time td of the relay, the inertia of the load system, etc., and if the pulse width of the rise command signal is small as shown in t1 in FIG. However, since the pulse width is set as large as t in the above example, it is assumed that a thin pulse due to vibration of the paper feed roller 5' comes in as a height detection signal of the paper feed roller 5'. However, it is possible to raise the paper feed tray 1 sufficiently. Therefore, printing paper 2
While feeding several sheets of paper, the roller is not affected by the vibration of the paper feed roller 5', and it is possible to realize one intermittent rise for every several sheets of paper fed.
第６，７図には給紙台１の左右移動機構、及び
微下降させる機構が示されている。 6 and 7 show a mechanism for moving the paper feed tray 1 left and right, and a mechanism for slightly lowering it.
給紙台１は１対のガイド板２５間に架設された
前後スライド軸４１，４２に後部側板が軸方向
（左右方向）に移動可能なように支持されている。
前方のスライド軸４１には左右移動レバー４３の
基端が、該基端に設けた長穴４４を保持ピン４５
に係合させて変位可能に保持されている。移動レ
バー４３の中間部は給紙台１の頂板裏面に設けた
枢軸４７を介して枢支され、かつ先端は給紙台１
の前方に突出され、突出した先端部４３ａの両側
面にはタツチセンサ４８が取付けられている。タ
ツチセンサ４８からは図示しないハーネスが給紙
台１の内部を通つて同様に図示省略した制御装置
に接続されている。 The paper feed tray 1 is supported by front and rear slide shafts 41 and 42 installed between a pair of guide plates 25 so that the rear side plates are movable in the axial direction (horizontal direction).
The base end of the left-right moving lever 43 is attached to the front slide shaft 41, and the elongated hole 44 provided at the base end is connected to the holding pin 45.
It is held so that it can be displaced by being engaged with it. The middle part of the moving lever 43 is pivotally supported via a pivot 47 provided on the back surface of the top plate of the paper feed tray 1, and the tip thereof is attached to the paper feed tray 1.
Touch sensors 48 are attached to both sides of the protruding tip 43a. A harness (not shown) is connected from the touch sensor 48 through the interior of the paper feed tray 1 to a control device (also not shown).
前記において、給紙台１が第６図のような給紙
高さにある状態で試し刷りを行なう場合、操作者
は指でタツチセンサ４８に触れる。これにより、
タツチセンサ４８からハーネスを介して制御装置
に検知信号が出力されるとともに、制御装置から
モータ３０へ下降指令信号が出力され、モータ３
０が回転駆動されて給紙台１は一定量、微下降さ
れる。給紙台１が微下降した後、タツチセンサ４
８から指を離すと、給紙台１はモータ３０によつ
て再び上昇され、試し刷りから行なわれる状態と
なる。 In the above, when performing test printing with the paper feed tray 1 at the paper feed height as shown in FIG. 6, the operator touches the touch sensor 48 with his or her finger. This results in
A detection signal is output from the touch sensor 48 to the control device via the harness, and a descending command signal is output from the control device to the motor 30.
0 is rotationally driven, and the paper feed tray 1 is slightly lowered by a certain amount. After the paper feed tray 1 has slightly lowered, the touch sensor 4
When the user releases the finger from 8, the paper feed tray 1 is raised again by the motor 30, and is ready for trial printing.
試し刷り等の後、第６図のように給紙台１が給
紙高さにある状態で、左右の印刷画像位置を調整
しようとする場合には、前記のようにタツチセン
サ４８に指で触れて給紙台１が微下降した時点
で、レバー４３の先端部４３ａを矢印のように左
右に動かして給紙台１を左右に移動させる。これ
によつて画像位置が調整され、調整の後、タツチ
センサ４８から指を離す。 If you want to adjust the left and right print image positions with the paper feed tray 1 at the paper feed height as shown in FIG. 6 after test printing, etc., touch the touch sensor 48 with your finger as described above. When the paper feed tray 1 is slightly lowered, the tip portion 43a of the lever 43 is moved left and right as shown by the arrow to move the paper feed tray 1 left and right. The image position is thereby adjusted, and after the adjustment, the user releases his or her finger from the touch sensor 48.
したがつて、従来のように給紙高さにある給紙
台１を予め下降させてからレバー４３の操作をす
る必要がなく、レバー４３の先端部４３ａを持
ち、該先端部４３ａのタツチセンサ４８を指で触
れたうえで、操作するというワンタツチ操作で左
右の画像位置の調整が可能となる。また、給紙台
１が一定量、微下降されるので、前記操作時に最
上位の印刷用紙２が給紙ローラ５によつて左右に
引きずられることもなくなり、従来のような引き
ずられたまま給紙されてシワやスキユー等が発生
することが完全になくなつて、ねらい通りの画像
が得られる。 Therefore, there is no need to lower the paper feed table 1 at the paper feed height in advance and then operate the lever 43 as in the conventional case. You can adjust the left and right image positions with a one-touch operation by touching and operating with your finger. In addition, since the paper feed tray 1 is slightly lowered by a certain amount, the topmost printing paper 2 is no longer dragged left and right by the paper feed roller 5 during the above operation, and is not fed while being dragged as in the conventional case. Wrinkles and skew caused by paper are completely eliminated, and the desired image can be obtained.
第８〜１０図にはアイドリング工程のときに、
給紙台１を微下降させる制御機構が示されてい
る。 In Figures 8 to 10, during the idling process,
A control mechanism for slightly lowering the paper feed table 1 is shown.
第９図に示す操作部５１には図示しないアイド
リングギーが設けられ、該アイドリングキーが押
されると制御装置５２にアイドリング指令信号が
出力されるようになつている。アイドリング指令
信号が送られると、制御装置５２からは駆動モー
タ３０へ給紙台１を下降させる下降指令信号が出
力され、これによつて給紙台１は微下降される。
給紙台１の下降量は印刷用紙２に給紙ローラ５が
接しない程度の任意に設定されるが、この設定は
例えば制御装置５２に内蔵したタイマを利用して
時間で行なつたり、または第１０図に示すように
ガイド板２５の下端部に取付けた下降限センサ５
４を利用して距離で行なう。 The operating section 51 shown in FIG. 9 is provided with an idling key (not shown), and when the idling key is pressed, an idling command signal is output to the control device 52. When the idling command signal is sent, the control device 52 outputs a lowering command signal to the drive motor 30 to lower the paper feed tray 1, whereby the paper feed tray 1 is slightly lowered.
The amount of descent of the paper feed tray 1 is arbitrarily set to such an extent that the paper feed roller 5 does not come into contact with the printing paper 2, but this setting can be done, for example, by using a timer built into the control device 52, or by As shown in FIG. 10, the lower limit sensor 5 is attached to the lower end of the guide plate 25.
Use 4 to do this at a distance.
したがつて、アイドリング工程のときには操作
部５１のアイドリングキーを押すだけで、給紙台
１を給紙ローラ５が印刷用紙２に接しないように
自動的に微下降させることが可能となり、従来の
ようにアイドリング後の１枚目の印刷用紙２に画
像位置ずれが起きるのを防止するために、操作者
が給紙台１を下降したり、印刷用紙２が送られな
いように手で押える等のわずらわしい作業がなく
なる。 Therefore, during the idling process, simply by pressing the idling key on the operation unit 51, it becomes possible to automatically lower the paper feed table 1 slightly so that the paper feed roller 5 does not come into contact with the printing paper 2. In order to prevent the image position from shifting on the first sheet of printing paper 2 after idling, the operator may lower the paper feed table 1 or hold down the printing paper 2 by hand to prevent it from being fed. No more troublesome work.
(5) 効果
この考案は上記のような構成したので、給紙台
が下降した非給紙時にはフレームの下向突部が受
部材に当接して下分離ローラの上分離ローラへの
圧接、すなわち分離圧を解除でき、従来、長期
間、非給紙状態が続いたときに起つていた上分離
ローラや下分離ローラの変形を完全に防止するこ
とができる。また、機構も簡単であり、製作が容
易となるとともに製作費も安価に抑えることがで
きるという優れた効果がある。(5) Effects Since this device is constructed as described above, when the paper feed table is lowered and the paper is not being fed, the downward protrusion of the frame comes into contact with the receiving member and the lower separation roller is pressed against the upper separation roller, i.e. The separation pressure can be released, and deformation of the upper separation roller and the lower separation roller, which conventionally occurs when the paper is not fed for a long period of time, can be completely prevented. Moreover, the mechanism is simple, and there is an excellent effect that manufacturing is easy and manufacturing costs can be kept low.
第１図はこの考案の実施例を示す正面図、第２
図は同上の作用を説明するための正面図、第３図
は同上の給紙台自動間欠上昇機構を示す要部正面
図、第４図は第３図のものの制御信号等を示す図
面、第５図は第４図における信号のパルスを拡大
して示す図面、第６図は同上の給紙台、左右移動
機構及び微下降機構を示す正面図、第７図は第６
図の底面図、第８図は同上のアイドリングの工程
のときに給紙台を微下降させる制御機構を示す要
部斜視図、第９図は第８図のものの制御信号を示
すブロツク図、第１０図は下降限センサの取付部
を示す要部拡大斜視図である。
１……給紙台、２……印刷用紙、４……上分離
ローラ、５……給紙ローラ、７……フレーム、
８，１６……ばね、１０……下分離ローラ、１１
……Ｌ形受レバー、１３……枢軸、１８……突
片、２０……〓間。
Figure 1 is a front view showing an embodiment of this invention, Figure 2 is a front view showing an embodiment of this invention.
The figure is a front view for explaining the operation of the same as above, FIG. Fig. 5 is an enlarged view of the signal pulses in Fig. 4, Fig. 6 is a front view showing the paper feed table, the left/right movement mechanism, and the slight lowering mechanism.
8 is a perspective view of the main part showing the control mechanism for slightly lowering the paper feed tray during the idling process, FIG. 9 is a block diagram showing the control signals of the one in FIG. 8, and FIG. FIG. 10 is an enlarged perspective view of the main part showing the attachment part of the lower limit sensor. 1...Paper feed table, 2...Print paper, 4...Top separation roller, 5...Paper feed roller, 7...Frame,
8, 16... Spring, 10... Lower separation roller, 11
... L-shaped receiver lever, 13 ... pivot, 18 ... protrusion, 20 ... between.
Claims (1)
ーラと給紙ローラとを、給紙ローラが昇降可能な
給紙台上に載置した用紙に接し、かつ上分離ロー
ラが給紙台上に載置した用紙の先端と接しない位
置となるように設け前記上分離ローラにばねによ
つて下方から圧接して分離圧を発生させる下分離
ローラを設けた給紙装置において前記上分離ロー
ラと給紙ローラはその回転軸がフレームに回転可
能に支持され、このフレームはフレームを貫通し
て機枠に支持された上分離ローラの回転軸を支点
として揺動可能となつており、また前記下分離ロ
ーラは機枠に揺動可能に支持された受レバーに回
転可能に支持され、前記フレームには下向突片が
設けられていて、この下向突片は給紙台が給紙高
さにあり、給紙ローラが給紙台上の用紙と接した
状態では、前記受レバーとの間に〓間が形成され
て、下分離ローラを上分離ローラに圧接させ、給
紙台が下降して給紙ローラが給紙台上の用紙と接
しなくなつた状態では、フレームとともに下動し
て前記受レバーに当接し、これを下方に揺動する
ことによつて、下分離ローラの上分離ローラへの
圧接を解除することを特徴とする給紙装置におけ
る分離圧解除機構。 An upper separation roller and a paper feed roller, which are rotatable in the paper feeding direction in conjunction with each other, are arranged such that the paper feed roller is in contact with paper placed on a paper feed tray that can be moved up and down, and the upper separation roller is in contact with paper placed on a paper feed tray that can be moved up and down. In a paper feeding device, a lower separation roller is provided at a position that does not touch the leading edge of the loaded paper and presses against the upper separation roller from below with a spring to generate separation pressure. The rotating shaft of the paper roller is rotatably supported by a frame, and this frame can swing around the rotating shaft of the upper separating roller that passes through the frame and is supported on the machine frame. The roller is rotatably supported by a receiver lever that is swingably supported on the machine frame, and the frame is provided with a downward protrusion, and this downward protrusion allows the paper feed tray to reach the paper feed height. When the paper feed roller is in contact with the paper on the paper feed table, a gap is formed between the paper feed roller and the receiving lever, and the lower separation roller is pressed against the upper separation roller, and the paper feed table is lowered. When the paper feed roller is no longer in contact with the paper on the paper feed table, it moves downward together with the frame and comes into contact with the receiving lever, and by swinging this downward, the upper separation roller of the lower separation roller A separation pressure release mechanism in a paper feeder, characterized in that the separation pressure release mechanism releases the pressure contact with the paper feeder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13867986U JPH0518342Y2 (en) | 1986-09-09 | 1986-09-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13867986U JPH0518342Y2 (en) | 1986-09-09 | 1986-09-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6345735U JPS6345735U (en) | 1988-03-28 |
| JPH0518342Y2 true JPH0518342Y2 (en) | 1993-05-17 |
Family
ID=31043879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13867986U Expired - Lifetime JPH0518342Y2 (en) | 1986-09-09 | 1986-09-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0518342Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008050135A (en) * | 2006-08-25 | 2008-03-06 | Duplo Seiko Corp | Paper feeder |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5269152B2 (en) * | 2011-06-24 | 2013-08-21 | キヤノン株式会社 | Sheet feeding apparatus and image forming apparatus |
-
1986
- 1986-09-09 JP JP13867986U patent/JPH0518342Y2/ja not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008050135A (en) * | 2006-08-25 | 2008-03-06 | Duplo Seiko Corp | Paper feeder |
| JP4550032B2 (en) * | 2006-08-25 | 2010-09-22 | デュプロ精工株式会社 | Paper feeder |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6345735U (en) | 1988-03-28 |
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