JPH0517136B2 - - Google Patents
Info
- Publication number
- JPH0517136B2 JPH0517136B2 JP61095695A JP9569586A JPH0517136B2 JP H0517136 B2 JPH0517136 B2 JP H0517136B2 JP 61095695 A JP61095695 A JP 61095695A JP 9569586 A JP9569586 A JP 9569586A JP H0517136 B2 JPH0517136 B2 JP H0517136B2
- Authority
- JP
- Japan
- Prior art keywords
- paper feed
- paper
- feed tray
- tray
- feeding
- 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 - Fee Related
Links
- 238000001514 detection method Methods 0.000 claims description 26
- 230000003028 elevating effect Effects 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Landscapes
- Sheets, Magazines, And Separation Thereof (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はプリンタ、複写機等の多数のシート紙
を使用する装置又は機械に使用される給紙装置に
関し、特には、幾つかのサイズのシート紙を積載
する複数の給紙台を上下に多段に配置して有する
給紙装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper feeding device used in devices or machines that use a large number of sheets of paper, such as printers and copying machines, and particularly relates to The present invention relates to a paper feeding device having a plurality of paper feeding stands arranged vertically in multiple stages for stacking sheets of paper.
［従来の技術］
プリンタ、複写機等の画像再生装置の分野にお
いては、その利用範囲の拡大に伴い多種サイズの
画像再生が要求され、その結果、複数の異なるサ
イズのシート紙を適宜にプリンタ内に供給する為
の有効な給紙装置を備えることが必要とされてい
る。[Prior Art] In the field of image reproducing devices such as printers and copiers, as the scope of use of these devices expands, image reproducing of various sizes is required. It is necessary to have an effective paper feeding device for feeding the paper.
代表的な給紙装置としては、所望の紙サイズの
カセツトを手操作により適宜交換可能としたカセ
ツト型装置、又は予め予測される多数のサイズの
シート紙を収容し、適宜機械的に所望サイズのシ
ート紙を選択する給紙台型装置が知られる。前者
は、給紙装置の機械的構成を簡単にし得るという
利点を有する反面、多量の紙（例えば500枚）の
収納は難しく、更にカセツト着脱作業が煩雑であ
り、又紙サイズがA1又はA0等の大型サイズの場
合、不向きであるという問題を残す。それ故、多
量プリント及び大型サイズのプリントを要するプ
リンタにおいては、主として後者が使用されてい
る。後者においては紙サイズの選択はプリンタ操
作パネル上のスイツチ操作によりワンタツチで行
なえ使用上簡便であるという利点を有する。 Typical paper feeding devices include a cassette-type device in which the cassettes of the desired paper size can be changed manually as appropriate, or a device that accommodates sheet paper of a large number of predetermined sizes and mechanically changes the cassette of the desired paper size as appropriate. A paper feed tray type device for selecting sheet paper is known. The former has the advantage of simplifying the mechanical configuration of the paper feeding device, but it is difficult to store a large amount of paper (for example, 500 sheets), the work of attaching and detaching the cassette is complicated, and the paper size is A1, A0, etc. The problem remains that it is unsuitable for large sizes. Therefore, the latter is mainly used in printers that require large-volume printing and large-sized printing. The latter has the advantage that the paper size can be selected with a single touch by operating a switch on the printer operation panel, making it easy to use.
従来、この種の装置として例えば特開昭57−
195049号又は特開昭59−212858号公報に開示され
るように、異なる紙サイズ用の複数の給紙台をそ
の前端部が上下方向にほぼ一直線に整列するよう
に保持部材上に多段に配列させ、該保持部材を適
宜に昇降することにより所望の給紙台を給紙部入
口に位置させ、次いで当該給紙台を略水平方向に
移動して給紙部内に配置する構成が知られる。 Conventionally, as this type of device, for example, Japanese Patent Application Laid-open No. 57-
As disclosed in No. 195049 or Japanese Unexamined Patent Publication No. 59-212858, a plurality of paper feed trays for different paper sizes are arranged in multiple stages on a holding member so that their front ends are aligned substantially in a straight line in the vertical direction. A configuration is known in which a desired paper feed tray is positioned at the entrance of the paper feed section by moving the holding member up and down as appropriate, and then the paper feed tray is moved in a substantially horizontal direction and placed within the paper feed section.
［発明が解決しようとする問題点］
しかしながら上記した従来装置においては、給
紙台上のシート紙を給紙部内に配置された吸気筒
又は給紙ローラ等の紙送り手段に対してその作用
位置に押し上げる為の押上け装置を給紙部下方又
は給紙台自体に別個に備えるものであり、その結
果、給紙装置の全体構成を簡易化し得ないという
問題点を有する。又、全ての給紙台先端を整列し
て収容するた構成である為にA0等の大型サイズ
のシート紙を積載する給紙台の後端は後方に突出
し、この為、給紙装置自体に多大のスペースを必
要とする。[Problems to be Solved by the Invention] However, in the above-mentioned conventional device, the sheet paper on the paper feed tray is placed in a position where it acts relative to a paper feed means such as a suction cylinder or a paper feed roller disposed in the paper feed section. A push-up device for pushing up the paper feeder is separately provided below the paper feeder or on the paper feeder itself, and as a result, there is a problem that the overall configuration of the paper feeder cannot be simplified. In addition, since the tips of all the paper feed trays are arranged and housed, the rear end of the paper feed tray, which is used to load large size sheets such as A0, protrudes rearward. Requires a lot of space.
本発明は上記したような従来の給紙装置の問題
点に鑑みて成されたもので、所望の給紙台を適宜
に紙送り手段の作用位置に供給し得る、給紙装置
を簡単且つコンパクトな形で提供することを目的
とする。 The present invention has been made in view of the problems of conventional paper feeding devices as described above, and is a simple and compact paper feeding device that can appropriately feed a desired paper feeding tray to the operating position of the paper feeding means. The purpose is to provide it in a form that
［問題点を解決するための手段］
この為、本発明による給紙装置は、紙送り手段
を有する給紙部と、シート紙を積載した給紙台を
略水平方向に移動可能に且つ上下方向に多段に収
納する保持部材と、前記保持部材を給紙部側部に
おいて上下方向に移動させる昇降装置と、給紙部
入口に位置する給紙台を略水平方向に引き出し当
該給紙台を前記紙送り手段の下方に案内する引き
出し装置とを有する給紙装置において、前記保持
部材は最下位の給紙台を予め引き出し位置に保持
して収納し、選択した給紙台が給紙部入口に位置
したことを検知する第１の検知装置と、給紙台が
紙送り手段の下方に引き出されたことを検知する
第２の検知装置と、引き出された給紙台が前記紙
送り手段の作用位置に移動したことを検知する第
３の検知装置と、これら第１、第２、第３の検知
装置からの信号に基づき前記昇降装置および引き
出し装置の動作を制御する制御手段、とを有し、
前記制御手段は、最下位以外の給紙台を選択した
第１のモードと、最下位の給紙台を選択した第２
のモードとを有し、第１のモードは、給紙台選択
信号に基づき前記昇降装置を付勢して前記保持部
材を昇降し前記第１の検知装置が選択した給紙台
が給紙部入口に位置したことを検知したときに前
記昇降装置を消勢し、次いで引き出し装置を付勢
して前記第２の検知装置が検知するまで当該給紙
台を給紙部に引き出し、次いで前記昇降装置を再
び付勢して前記保持部材を上方に移動し前記第３
の検知装置が当該給紙台が前記紙送り手段の作用
位置に位置したときに停止させ、第２のモード
は、前記第１および第２の検知装置からの信号を
省略して前記第３の検知装置が最下位の給紙台が
紙送り手段の作用位置に位置したことを検知する
まで前記昇降装置を連続して動作させる、ことを
特徴とする。[Means for Solving the Problems] For this reason, the paper feeding device according to the present invention has a paper feeding unit having a paper feeding means and a paper feeding table on which sheet paper is stacked, which can be moved substantially horizontally and vertically. a holding member that is stored in multiple stages, a lifting device that moves the holding member vertically on the side of the paper feed section, and a paper feed tray located at the entrance of the paper feed section that is pulled out in a substantially horizontal direction and the paper feed tray is moved to the In a paper feeding device having a pull-out device that guides the paper feeding unit downward, the holding member holds and stores the lowest paper feed tray in advance in a pulled-out position, and the selected paper feed tray is placed at the entrance of the paper feed section. a first detection device that detects that the paper feed tray is positioned; a second detection device that detects that the paper feed tray is pulled out below the paper feeding device; a third detection device that detects movement to the position; and a control means that controls the operation of the lifting device and the drawer device based on signals from the first, second, and third detection devices. ,
The control means operates in a first mode in which a paper feed tray other than the lowest one is selected, and in a second mode in which a lowest paper feed tray is selected.
In the first mode, the elevating device is energized based on the paper feed tray selection signal to raise and lower the holding member, and the paper feed tray selected by the first detection device is moved to the paper feed section. When the position at the entrance is detected, the elevating device is de-energized, the drawer device is energized and the paper feed tray is pulled out to the paper feed section until the second detection device detects the feed tray, and then the elevating device is turned off. The device is energized again to move the holding member upwards and remove the third
The detection device stops the paper feed tray when it is located at the operating position of the paper feeding means, and the second mode is configured to omit the signals from the first and second detection devices and to stop the paper feed tray when the paper feed tray is located at the operating position of the paper feeding means. The invention is characterized in that the elevating device is operated continuously until the detecting device detects that the lowest paper feed table is located at the operating position of the paper feeding means.
［作用］
上記した構成により、選択された給紙台は、最
下位の給紙台を除く給紙台については、第１ステ
ツプとして給紙部入口に位置され、第２ステツプ
として給紙部内に引き出され、第３ステツプとし
て紙送り手段の作用位置に自動的に位置するよう
に移動され、又、最下位の給紙台については１ス
テツプで紙送り手段の作用位置に位置するように
移動する。[Function] With the above configuration, the selected paper feed tray is located at the entrance of the paper feed section as the first step, and is located inside the paper feed section as the second step, except for the lowest paper feed tray. The tray is pulled out and moved to the working position of the paper feeding means in the third step, and the lowest paper feeding table is moved to the working position of the paper feeding means in one step. .
［実施例］ 次に、図示した本発明の実施例を説明する。[Example] Next, illustrated embodiments of the present invention will be described.
第１図は本発明による給紙装置の一例を示し、
この例では給紙装置１は、プリンタ本体２に対し
て分離可能なユニツト式となつており、プリンタ
本体との連結時には適当な制御手段によりプリン
タ本体２の動作と関連してその動作を制御され
る。 FIG. 1 shows an example of a paper feeding device according to the present invention,
In this example, the paper feeding device 1 is of a unit type that can be separated from the printer body 2, and when connected to the printer body, its operation is controlled in conjunction with the operation of the printer body 2 by an appropriate control means. Ru.
給紙装置１は、幾つかのサイズのシート紙を積
載した複数の給紙台Ｃ１，Ｃ２，Ｃ３，Ｃ４をほ
ぼ等間隔で上下に多段に収納した給紙台保持部材
３を有する。保持部材３は第１図でみて左右方向
が開放した箱枠形状よりなり、その側板３ａ（一
方のみ図示）の外面の両端部近くは給紙装置の側
板１ａに固定された上下に延びるスライドレール
装置４により支持され、それにより保持部材３全
体が上下方向に移動し得る。 The paper feeder 1 has a paper feed tray holding member 3 in which a plurality of paper feed trays C1, C2, C3, and C4 loaded with sheet paper of several sizes are housed in multiple stages vertically at approximately equal intervals. The holding member 3 has a box frame shape that is open in the left and right directions as seen in FIG. 1, and near both ends of the outer surface of the side plate 3a (only one is shown) are slide rails fixed to the side plate 1a of the paper feeder and extending up and down. It is supported by a device 4, whereby the entire holding member 3 can be moved in the vertical direction.
一方、この移動を実行する為に、昇降装置２０
として給紙装置の側板１ａの内面に、四方に離間
して位置するスプロケツト５，６，７，８、並び
にスプロケツト８に隣接して位置するスプロケツ
ト９が夫々回転自在に配置されており、これらス
プロケツト５，６，９，７，８、をその順に巡つ
て無端チエーン１０が張架されている。このチエ
ーン１０はその適所１１において保持部材３の側
板３ａに固定されており、チエーンの移動に伴つ
て保持部材３を上下方向に移動させる。尚、スプ
ロケツト５乃至９及びチエーン１０は保持部材３
の他方の側においても同様の構成で配置されてい
る。図に示すようにスプロケツト５は別のチエー
ン１２を介して駆動スプロケツト１３に連結され
ており、駆動スプロケツト１３は適当な減速装置
を介して正逆転モータ（図示なし）の駆動軸に連
結されている。正逆転モータはプリンタ本体の操
作パネル上の給紙台選択スイツチからの信号に基
づき、後述する制御手段により正逆いずれかの方
向に作動し、保持部材３を昇降して、所望の給紙
台を給紙部５０の側部（以下給紙部入口という）
５１を配置する。 On the other hand, in order to execute this movement, the lifting device 20
On the inner surface of the side plate 1a of the paper feeding device, sprockets 5, 6, 7, and 8, which are spaced apart from each other in all directions, and a sprocket 9, which is located adjacent to sprocket 8, are respectively rotatably arranged. An endless chain 10 is stretched around 5, 6, 9, 7, and 8 in that order. This chain 10 is fixed to the side plate 3a of the holding member 3 at a proper position 11, and as the chain moves, the holding member 3 is moved in the vertical direction. Incidentally, the sprockets 5 to 9 and the chain 10 are attached to the holding member 3.
A similar configuration is also arranged on the other side. As shown in the figure, the sprocket 5 is connected to a drive sprocket 13 through another chain 12, and the drive sprocket 13 is connected to the drive shaft of a forward/reverse motor (not shown) through a suitable speed reducer. . The forward/reverse motor is operated in either the forward or reverse direction by the control means described later based on a signal from the paper feed tray selection switch on the operation panel of the printer main body, and moves the holding member 3 up and down to the desired paper feed tray. is the side part of the paper feed section 50 (hereinafter referred to as the paper feed section entrance)
Place 51.
各給紙台の上下方向位置を検知する為に、保持
部材３の一方の側板３ａの外面に、第２図に示す
ように、上下方向に平行して延びる三列の突条１
４，１５，１６が形成されており、、一方、給紙
装置の側板１ａの対向する部分に前記突条１４，
１５，１６がその遮光路内に貫入し得るようにフ
オトインタラプタ装置１７，１８，１９が配置さ
れている。フオトインタラプタ装置は対応する突
条が遮光路内に位置するか否かに応じて所定の信
号を後述の制御装置に送信する。突条１４，１
５，１６は上下方向に一部を重複した状態で段違
いに配置されており、これら突条がいずれのフオ
トインタラプタ装置の遮光路内に位置しているか
の組合わせにより、選択した給紙台がどの位置に
あるかを検知し得る。例えば給紙部入口５１を位
置基準として説明すると、フオトインタラプタ装
置１７及び１９が突条１４，１６により遮光され
ている場合には、最上位の給紙台Ｃ１が給紙部入
口５１に位置し、次いで保持部材３が上昇し、フ
オトインタラプタ装置１７のみが遮光状態となる
時、給紙台Ｃ１は給紙部の紙送り手段の作用位置
にある。同様にして、フオトインタラプタ装置１
７及び１８が遮光されている場合には第２の給紙
台Ｃ２が、又、フオトインタラプタ装置１８及び
１９が遮光されている場合には第３の給紙台Ｃ３
がそれぞれ給紙部入口５１に位置し、いずれのフ
オトインタラプタ装置も開放されている場合には
最下位の給紙台Ｃ４が給紙部入口に位置する。こ
のような検知に基づき、選択された給紙台が給紙
部入口に位置するように保持部材の昇降が行なわ
れる。 In order to detect the vertical position of each paper feed table, three rows of protrusions 1 are provided on the outer surface of one side plate 3a of the holding member 3, as shown in FIG.
4, 15, and 16 are formed, and on the other hand, the protrusions 14,
Photo interrupter devices 17, 18, 19 are arranged such that photo interrupters 15, 16 can penetrate into the light shielding path. The photo interrupter device transmits a predetermined signal to a control device, which will be described later, depending on whether the corresponding protrusion is located within the light shielding path. Projection 14,1
5 and 16 are arranged at different levels with parts of them overlapping in the vertical direction, and the selected paper feed tray is determined by the combination of which photo interrupter device's light shielding path these protrusions are located in. The position can be detected. For example, using the paper feed section entrance 51 as a position reference, if the photo interrupter devices 17 and 19 are shielded from light by the protrusions 14 and 16, the uppermost paper feed table C1 is located at the paper feed section entrance 51. Then, when the holding member 3 is raised and only the photointerrupter device 17 is in a light-shielded state, the paper feed tray C1 is in the operating position of the paper feeding means of the paper feed section. Similarly, photo interrupter device 1
7 and 18 are shielded from light, the second paper feed tray C2, and when the photo interrupter devices 18 and 19 are shielded from light, the third paper feed tray C3
are located at the paper feed section entrance 51, and when both photo interrupter devices are open, the lowest paper feed tray C4 is located at the paper feed section entrance. Based on such detection, the holding member is moved up and down so that the selected paper feed tray is located at the entrance of the paper feed section.
各給紙台Ｃ１〜Ｃ４は保持部材の側板３ａ間に
多段に設けられた支持板２１の各々の上面を滑動
可能に配置され、その水平方向（第１図でみて左
右方向）の移動は側板３ａの内面に取付けられた
水平方向に延在する案内体（図示なし）により案
内され、給紙台Ｃ１〜Ｃ３については前記した保
持部材の左右方向の開放部を介して左右いずれの
方向にも引き出すことができ、又、給紙台Ｃ４に
ついては右方向にのみ引き出すことができる。
尚、給紙台Ｃの側面には複数のコロ２２が支持板
２１上を滑動可能に配置され、前記引き出しを容
易としている。 Each of the paper feed trays C1 to C4 is arranged so as to be able to slide on the upper surface of each support plate 21 provided in multiple stages between the side plates 3a of the holding member, and its movement in the horizontal direction (left and right direction as seen in FIG. 1) is controlled by the side plates 3a. The paper feed trays C1 to C3 are guided by a horizontally extending guide body (not shown) attached to the inner surface of the holding member 3a, and the paper feed trays C1 to C3 are The paper feed tray C4 can be pulled out only in the right direction.
Incidentally, a plurality of rollers 22 are arranged on the side surface of the paper feed table C so as to be able to slide on the support plate 21 to facilitate the above-mentioned withdrawal.
第３図を参照として、給紙台Ｃ１〜Ｃ３につい
て説明すると、給紙台Ｃはその一方の側面に横方
向に突設したピン部材２３を有しており、給紙台
Ｃを保持部材３に収納する動作に伴つて、ピン部
材２３が給紙台案内部材２４の掛止装置２５によ
り掛け止められ、給紙台が所定位置に収納され
る。案内部材２４は保持部材３に対して水平方向
に移動可能に支持された横アーム２６を有し、横
アーム２６の後端側に前記掛止装置２５が配設さ
れ、その前端側には断面コ字状の縦アーム２７
が、その開放部２８が給紙台の引き出し方向に対
して横方向外側に向くように固定されている。案
内部材２４は縦アーム２７の一側が支持板２１の
前端部に当接することにより第１図でみて右方へ
の移動が阻止され、また縦アーム２７の他側は、
給紙装置の側板１ａの内面に上下方向に延在して
突設された短幅の阻止部材２９と当接することに
より第１図でみて左方への移動が阻止されてい
る。阻止部材２９は第１図に示すように、給紙部
入口５１において案内部材２４及び給紙台Ｃを通
すに十分な範囲にわたつて開放しており、これに
より、給紙台が給紙部入口５１に位置する時にの
み当該案内部材２４及び給紙台を第１図でみて左
方に引き出すことができる。給紙台Ｃ１〜Ｃ３に
関するそれぞれの案内部材２４は給紙台が保持部
材３内に収納されている状態において、その縦ア
ーム２７が上下方向に整列して各開放部２８が連
続した通路を形成するように位置している。 Referring to FIG. 3, the paper feed trays C1 to C3 will be explained. The paper feed tray C has a pin member 23 projecting laterally on one side thereof, and the paper feed tray C is held by a holding member 23. With the operation of storing the paper feed tray, the pin member 23 is latched by the latching device 25 of the paper feed tray guide member 24, and the paper feed tray is stored in a predetermined position. The guide member 24 has a horizontal arm 26 that is supported movably in the horizontal direction with respect to the holding member 3, and the above-mentioned latching device 25 is disposed on the rear end side of the horizontal arm 26, and a cross section is provided on the front end side. U-shaped vertical arm 27
However, the opening portion 28 is fixed so as to face outward in the lateral direction with respect to the direction in which the paper feed table is pulled out. The guide member 24 is prevented from moving to the right as seen in FIG. 1 by having one side of the vertical arm 27 abut against the front end of the support plate 21, and the other side of the vertical arm 27 is
Movement to the left in FIG. 1 is prevented by abutting against a short blocking member 29 that extends vertically and projects from the inner surface of the side plate 1a of the paper feeding device. As shown in FIG. 1, the blocking member 29 is opened at the paper feed section entrance 51 over a sufficient range to allow the guide member 24 and the paper feed tray C to pass through, thereby preventing the paper feed tray from entering the paper feed section. Only when located at the entrance 51, the guide member 24 and paper feed tray can be pulled out to the left as seen in FIG. When the paper feed trays C1 to C3 are housed in the holding member 3, the vertical arms 27 of the guide members 24 for the paper feed trays C1 to C3 are aligned in the vertical direction, and the openings 28 form continuous passages. It's located like that.
前記通路内を移動可能に引き出し用ローラ３１
が配設されている。引き出し用ローラ３１は、一
端を給紙装置の側板１ａに枢着したアーム３２の
自由端に回転自在に設けられており、図示のよう
に、縦アーム２７の開放部内に外側より突出し、
その周面が縦アーム２７の内側面と転接するよう
に配設されている。アーム３２の中央部には、一
端が回転円盤３３の外周部近くに枢着されたクラ
ンクアーム３４の他端が枢着されており、クラン
クアーム３４は円盤３３の回転に従つてアーム３
２を枢動し、これにより引き出し用ローラ３１が
案内部入口５１に位置する案内部材２４及びその
給紙台を引き出し、当該給紙台の前端側を給紙部
５０内に位置させる。 A pull-out roller 31 is movable within the passage.
is installed. The pull-out roller 31 is rotatably provided at the free end of an arm 32 whose one end is pivotally connected to the side plate 1a of the paper feeder, and as shown in the figure, protrudes from the outside into the open portion of the vertical arm 27.
It is disposed so that its peripheral surface is in rolling contact with the inner surface of the vertical arm 27. A crank arm 34, one end of which is pivoted near the outer periphery of a rotating disk 33, is pivotally connected to the center of the arm 32, and the crank arm 34 rotates as the disk 33 rotates.
2, thereby causing the pull-out roller 31 to pull out the guide member 24 located at the guide section entrance 51 and its paper feed tray, and position the front end side of the paper feed tray within the paper feed section 50.
給紙台の引き出しを検知する為に、円盤３３の
外周囲が通過可能に、給紙装置の固定部にフオト
インタラプタ装置３５が配置され、一方、円盤３
３のアーム３４の枢点を中心に180゜対向する位置
に２つの切り欠き部３６，３７が形成されてお
り、切り欠き部３６がフオトインタラプタ装置３
５に位置する時に給紙台が所定の給紙部内に位置
したことを検知し、又、切り欠き部３７がフオト
インタラプタ装置３５に位置する時に給紙台が給
紙部入口に位置したことを検知する。この検知信
号は後述する制御装置に送られる。尚、符号３９
は円盤駆動用のモータである。 In order to detect the withdrawal of the paper feed tray, a photo interrupter device 35 is arranged at the fixed part of the paper feed device so that the outer periphery of the disk 33 can pass through.
Two notches 36 and 37 are formed at positions facing each other by 180 degrees around the pivot point of the arm 34 of the photointerrupter device 3.
5, it is detected that the paper feed tray is located within a predetermined paper feed section, and when the notch 37 is located at the photo interrupter device 35, it is detected that the paper feed tray is located at the entrance of the paper feed section. Detect. This detection signal is sent to a control device described later. In addition, code 39
is the motor for driving the disc.
引き出された給紙台は、給紙部の紙送り装置の
作用位置よりも下方に位置し（以下、引き出し位
置という）、次いで、昇降装置２０の作動により、
作用位置に上昇される。 The drawn out paper feed table is located below the operating position of the paper feeding device of the paper feeding section (hereinafter referred to as the drawn out position), and then, by the operation of the lifting device 20,
Raised into working position.
一方、最下位の給紙台Ｃ４について述べると、
給紙台Ｃ４には通常最大サイズのシート紙が積載
され、第１図に示すようにそれが保持部材３内に
収納された状態において、その先端部は、他の給
紙台Ｃ１〜Ｃ３の先端よりも前方に位置し、給紙
台Ｃ１〜Ｃ３を引き出した位置とほぼ同じ位置に
位置する。従つて、給紙台Ｃ４が選択された場合
には給紙台は直接に給紙部の紙送り手段の作用位
置に上昇され、前記した給紙台の引き出し動作は
省略される。 On the other hand, regarding the lowest paper feed tray C4,
Normally, the maximum size sheet paper is loaded on the paper feed table C4, and when it is housed in the holding member 3 as shown in FIG. It is located in front of the leading edge, and is located in approximately the same position as the position where the paper feed trays C1 to C3 are pulled out. Therefore, when the paper feed tray C4 is selected, the paper feed tray is directly raised to the operating position of the paper feeding means of the paper feed section, and the above-described operation of pulling out the paper feed tray is omitted.
第４図を参照として給紙部５０について説明す
ると、給紙部５０は、その上部位置に紙送り手段
として吸気筒５２を備え、吸気筒５２の下方は保
持部材３より引き出された給紙台Ｃ１〜Ｃ４を上
下方向に移動可能に空間を形成している。 The paper feeding section 50 will be described with reference to FIG. 4. The paper feeding section 50 is provided with an intake cylinder 52 as a paper feeding means at an upper position thereof, and below the intake cylinder 52 is a paper feeding table pulled out from the holding member 3. A space is formed in which C1 to C4 can be moved in the vertical direction.
吸気筒５２はその後部壁５３に上下に延びる案
内スリーブ５４を固定して有し、案内スリーブ５
４内には、下端にローラ５５を回転自在に支持し
た軸５６が上下に移動し得るように案内されてい
る。ローラ５５は給紙台Ｃ上の最上位シート紙に
当接して軸５６を給紙台の上下移動に応動させる
ようになつている。軸５６の上端は吸気筒５２の
後部壁５３に取付けられたフオトインタラプタ装
置５７の遮光路内に下方から貫入し得るようにな
つており、給紙台Ｃが吸気筒５２の作用位置に達
した時に軸５６の上端がフオトインタラプタ装置
５７の遮光路内に位置して遮光動作をし、この遮
光により生じる信号を給紙台の後述の制御装置に
送つて給紙台の上方への移動を停止するようにな
つている。 The intake cylinder 52 has a guide sleeve 54 fixed to its rear wall 53 and extending vertically.
4, a shaft 56 rotatably supporting a roller 55 at its lower end is guided so as to be movable up and down. The roller 55 is in contact with the uppermost sheet of paper on the paper feed tray C, and causes the shaft 56 to respond to the vertical movement of the paper feed tray. The upper end of the shaft 56 is adapted to penetrate from below into the light-blocking path of a photo interrupter device 57 attached to the rear wall 53 of the suction cylinder 52, and when the paper feed table C reaches the operating position of the suction cylinder 52. At times, the upper end of the shaft 56 is positioned within the light-blocking path of the photo interrupter device 57 to perform a light-blocking operation, and a signal generated by this light-blocking is sent to a later-described control device for the paper feed table to stop the paper feed table from moving upward. I'm starting to do that.
吸気筒５２は、その下端部に後部壁５３、前部
壁５８、底部壁５９及び傾斜壁６１から画成され
る吸気室６２を有しており、傾斜壁６１は横方向
に延びる吸気用開口６３が形成されている。吸気
室６２内には外周にゴムリングを被着した給紙ロ
ーラ６４がその外周面の一部を開口６３から外方
に突出するように配置されており、軸６５を介し
て適当な回転駆動装置に連結されて、第１図でみ
て反時計方向へ所定の速度で回転されるようにな
つている。 The intake cylinder 52 has an intake chamber 62 defined at its lower end by a rear wall 53, a front wall 58, a bottom wall 59, and an inclined wall 61, and the inclined wall 61 has an intake opening extending laterally. 63 is formed. A paper feed roller 64 whose outer circumference is covered with a rubber ring is disposed within the intake chamber 62 so that a portion of its outer circumferential surface protrudes outward from the opening 63 , and is rotated appropriately via a shaft 65 . It is connected to a device and rotated at a predetermined speed in a counterclockwise direction as viewed in FIG.
吸気筒５２は吸気室６２の上部に弁室６６を形
成しており、弁室６６はその内部に回転弁部材６
７を装着して有し、吸気室内の空気の流れを遮断
し得るようになつている。吸気筒５２の上方は送
風機等の適当な負圧発生装置６８（第１図に図
示）に連結されており、吸気室６２を大気圧力よ
り低い圧力に維持するようになつている。これに
より、給紙台が吸収筒の作用位置にある時に、給
紙台上の最上位シート紙が開口６３の吸気により
吸気筒５２に吸引され、次いでローラ６４が回転
して最上位シート紙を送りローラ６９に給送す
る。尚、第１図において符号７１は空気吹付装置
であり、空気をシート紙の表面とほぼ平行に吹付
けて最上位シート紙を次位以下のシート紙から分
離するように作用する。 The intake cylinder 52 forms a valve chamber 66 in the upper part of the intake chamber 62, and the valve chamber 66 has a rotary valve member 6 therein.
7 is attached to the air intake chamber so as to be able to block the flow of air within the intake chamber. The upper portion of the intake cylinder 52 is connected to a suitable negative pressure generating device 68 (shown in FIG. 1), such as a blower, to maintain the intake chamber 62 at a pressure lower than atmospheric pressure. As a result, when the paper feed tray is in the action position of the absorption cylinder, the uppermost sheet paper on the paper feed tray is sucked into the suction cylinder 52 by the intake air from the opening 63, and then the roller 64 rotates to remove the uppermost sheet paper. It is fed to the feed roller 69. In FIG. 1, reference numeral 71 denotes an air blowing device, which blows air substantially parallel to the surface of the sheet of paper to separate the uppermost sheet from the following sheets.
次に第５図及び第６図を参照として、給紙台の
移動の制御について説明する。斯かる制御は例え
ば第５図の制御回路８０によつて行なわれ、該制
御回路８０は、制御プログラムを内蔵する固定記
憶装置（ROM）８１、ROM８１に内蔵された
制御プログラムに従つて情報処理を行なう中央処
理装置（CPU）８２、演算結果及びデータを一
時的に記憶する等速呼出し記憶装置（RAM）８
３、各スイツチ及び検知手段からの信号の為の入
力インターフエース回路８４及び出力インターフ
エース回路８５を有する。 Next, with reference to FIGS. 5 and 6, control of movement of the paper feed table will be described. Such control is performed, for example, by a control circuit 80 shown in FIG. 5, and the control circuit 80 has a fixed storage device (ROM) 81 containing a control program, and performs information processing according to the control program built in the ROM 81. a central processing unit (CPU) 82 for performing calculations, and a constant access memory (RAM) 8 for temporarily storing calculation results and data.
3. It has an input interface circuit 84 and an output interface circuit 85 for signals from each switch and sensing means.
第１図は第２の給紙台Ｃ２が吸気筒５２の作用
位置にある状態を示すが、この状態において、第
３の給紙台Ｃ３を選択する場合を仮定する。プリ
ンタ本体の操作パネル上の給紙台選択スイツチ８
６により給紙台Ｃ３を選択すると、その信号８７
は入力インターフエース回路８４を介してCPU
８２に入力される。この信号に基づき、給紙台Ｃ
３が給紙部入口に位置すべきデータが読み出され
る。一方、CPU８２には入力インターフエース
回路８４を介して、給紙台の位置検知手段、即
ち、フオトインタラプタ装置１７，１８，１９か
ら給紙台Ｃ３の現在位置を示す信号８８が入力さ
れ、CPU８２はこれら信号８７，８８を比較し
て、該信号が異なる給紙台位置を示す場合には、
昇降装置２０を作動して給紙台Ｃ２を吸気筒５２
の作用位置より降下させて引き出し位置に位置さ
せ、次いで、引き出し装置のモータ３９を作動し
て給紙台Ｃ２を給紙部入口に返却する。一方、
CPU８２は選択した給紙台Ｃ３が現状の給紙台
Ｃ２の上方にあるか否かを判断して、これに応じ
て再び昇降装置２０を正逆いずれかの方向に作動
し（この場合保持部材３を上昇するように作動
し）、給紙台位置検知手段１７，１８，１９から
の信号が、給紙台Ｃ３が給紙部入口に達したこと
を検知するまで保持部材３を上昇する。給紙台Ｃ
３が給紙部入口に位置した後、引き出し装置のモ
ータ３９が作動して、給紙台Ｃ３を給紙部の引き
出し位置に引き出し、この時、円盤３６の切り欠
き部３７がフオトインタラプタ装置３５に位置し
て、装置３５からモータ３９の停止信号がCPU
に発せられ、モータが消勢して引き出しが完了す
る。次いで、再び昇降装置２０が作動されて、給
紙台Ｃ３の最上位シート紙が紙送り手段のローラ
５５及びその軸５４を押し上げてフオトインタラ
プタ装置５７を遮光動作させるまで、保持部材を
上昇し、遮光動作時、即ち、給紙第Ｃ３が吸着筒
５２の作用位置に位置した時に昇降装置２０を消
勢する。次いで弁部材６７が解放し且つ給紙ロー
ラ６４が回転して所望の給紙を行なう。給紙に伴
ない給紙台上のシート紙が減少して軸５４がフオ
トインタラプタ装置５７の遮光路から外れると、
再び昇降装置が作動して給紙台を上昇し、最上位
シート紙のレベルを吸着筒の作用位置に維持す
る。 Although FIG. 1 shows a state in which the second paper feed tray C2 is in the operating position of the intake cylinder 52, it is assumed that the third paper feed tray C3 is selected in this state. Paper feed tray selection switch 8 on the printer's operation panel
When paper feed tray C3 is selected by 6, its signal 87
is connected to the CPU via the input interface circuit 84.
82. Based on this signal, paper feed tray C
3 is located at the entrance of the paper feed section. On the other hand, a signal 88 indicating the current position of the paper feed tray C3 is inputted to the CPU 82 from the paper feed tray position detection means, that is, the photo interrupter devices 17, 18, and 19, via the input interface circuit 84, and the CPU 82 Comparing these signals 87 and 88, if the signals indicate different paper feed tray positions,
Operate the lifting device 20 to move the paper feed table C2 to the suction cylinder 52.
Then, the motor 39 of the pull-out device is activated to return the paper feed tray C2 to the entrance of the paper feed section. on the other hand,
The CPU 82 determines whether or not the selected paper feed tray C3 is above the current paper feed tray C2, and accordingly operates the lifting device 20 again in either the forward or reverse direction (in this case, the holding member 3), and the holding member 3 is raised until signals from the paper feed tray position detection means 17, 18, and 19 detect that the paper feed tray C3 has reached the entrance of the paper feed section. Paper feed tray C
3 is located at the entrance of the paper feed section, the motor 39 of the pull-out device is activated to pull out the paper feed tray C3 to the pull-out position of the paper feed section, and at this time, the notch 37 of the disc 36 is inserted into the photo interrupter device 35. , the stop signal of the motor 39 from the device 35 is sent to the CPU.
The motor is de-energized and the withdrawal is completed. Next, the elevating device 20 is operated again to raise the holding member until the uppermost sheet of paper on the paper feed table C3 pushes up the roller 55 of the paper feeding means and its shaft 54, causing the photo interrupter device 57 to perform a light blocking operation, During the light shielding operation, that is, when the feeding paper No. C3 is located at the action position of the suction tube 52, the elevating device 20 is deenergized. Valve member 67 then opens and paper feed roller 64 rotates to effect the desired paper feed. When the number of sheets of paper on the paper feed table decreases as the paper is fed, and the shaft 54 comes out of the light-shielding path of the photo interrupter device 57,
The lifting device is operated again to raise the paper feed table and maintain the level of the uppermost sheet of paper at the working position of the suction cylinder.
上記給紙台の動作は給紙台Ｃ１〜Ｃ３のいずれ
に対しても同様に行なわれる。 The operation of the paper feed trays described above is performed in the same manner for all of the paper feed trays C1 to C3.
一方、最下位の給紙台Ｃ４が選択された場合に
は、吸着部に位置する給紙台Ｃ２を前記のように
給紙部入口に返却したのち、昇降装置２０を作動
して給紙台Ｃ４の最上位シート紙が給紙部のロー
ラ及び軸を移動しフオトインタラプタ装置５７を
作動するまで保持部材３を上昇する。 On the other hand, when the lowest paper feed tray C4 is selected, the paper feed tray C2 located in the suction section is returned to the paper feed section entrance as described above, and then the lifting device 20 is operated to remove the paper feed tray. The holding member 3 is raised until the topmost sheet of paper C4 moves through the rollers and shafts of the paper feeder and activates the photointerrupter device 57.
上記した例では、紙送り手段として吸気筒を用
いたが、給紙ローラ等、他の送り手段であつても
良い。又、給紙台位置検知手段１７，１８，１９
引き出し検知手段３５、給紙部検知手段５７とし
てフオトインタラプタ装置を用いたがマイクロス
ツチ等の機械的検知手段であつても良い。 In the above example, the suction cylinder is used as the paper feeding means, but other feeding means such as a paper feeding roller may be used. Also, paper feed tray position detection means 17, 18, 19
Although a photointerrupter device is used as the drawer detection means 35 and the paper feed section detection means 57, mechanical detection means such as a micro stitch may also be used.
［発明の効果］
以上説明した構成により、本発明は、最下位の
給紙台については予め引き出し位置にある為に、
従来のごとき引き出し動作を省略でき、又、当該
給紙台に最大サイズのシート紙を積載することに
より、給紙台収容の為のスペースを最小とするこ
とができ、従来の給紙装置に比してコンパクトに
し得る。[Effects of the Invention] With the configuration described above, the present invention has the lowest paper feed tray in the drawn-out position in advance.
The conventional pull-out operation can be omitted, and by loading the maximum size sheet paper on the paper feed tray, the space required to accommodate the paper feed tray can be minimized, compared to conventional paper feed devices. can be made compact.
第１図は本発明による給紙装置の一例の縦断面
図、第２図は第１図の装置の給紙台位置検知手段
を示す側面図、第３図は第１図の装置の引き出し
装置の一例を示す斜視図、第４図は第１図の給紙
部の縦断面図、第５図は給紙台の動作の制御回路
を示すブロツク図、第６図は第５図の制御回路に
おける処理手順を示すフローチヤートである。
１……給紙装置、３……保持部材、２０……昇
降装置、２４……給紙台案内部材、５０……給紙
部、５１……給紙部入口、８０……制御手段。
FIG. 1 is a longitudinal cross-sectional view of an example of a paper feeding device according to the present invention, FIG. 2 is a side view showing a paper feeding tray position detection means of the device of FIG. 1, and FIG. 3 is a drawing device of the device of FIG. 1. FIG. 4 is a vertical cross-sectional view of the paper feeding unit shown in FIG. 1, FIG. 5 is a block diagram showing a control circuit for the operation of the paper feeding tray, and FIG. 6 is a control circuit of FIG. 5. 2 is a flowchart showing the processing procedure in FIG. DESCRIPTION OF SYMBOLS 1... Paper feeding device, 3... Holding member, 20... Lifting device, 24... Paper feeding table guide member, 50... Paper feeding section, 51... Paper feeding section entrance, 80... Control means.
Claims (1)
載した給紙台を略水平方向に移動可能に且つ上下
方向に多段に収納する保持部材と、前記保持部材
を給紙部側部において上下方向に移動させる昇降
装置と、給紙部入口に位置する給紙台を略水平方
向に引き出し当該給紙台を前記紙送り手段の下方
に案内する引き出し装置とを有する給紙装置にお
いて、前記保持部材は最下位の給紙台を予め引き
出し位置に保持して収納し、 選択した給紙台が給紙部入口に位置したことを
検知する第１の検知装置と、 給紙台が紙送り手段の下方に引き出されたこと
を検知する第２の検知装置と、 引き出された給紙台が前記紙送り手段の作用位
置に移動したことを検知する第３の検知装置と、 これら第１、第２、第３の検知装置からの信号
に基づき前記昇降装置および引き出し装置の動作
を制御する制御手段、とを有し、 前記制御手段は、最下位以外の給紙台を選択し
た第１のモードと、最下位の給紙台を選択した第
２のモードとを有し、 第１のモードは、給紙台選択信号に基づき前記
昇降装置を付勢して前記保持部材を昇降し前記第
１の検知装置が選択した給紙台が給紙部入口に位
置したことを検知したときに前記昇降装置を消勢
し、次いで引き出し装置を付勢して前記第２の検
知装置が検知するまで当該給紙台を給紙部に引き
出し、次いで前記昇降装置を再び付勢して前記保
持部材を上方に移動し前記第３の検知装置が当該
給紙台が前記紙送り手段の作用位置に位置したと
きに停止させ、 第２のモードは、前記第１および第２の検知装
置からの信号を省略して前記第３の検知装置が最
下位の給紙台が紙送り手段の作用位置に位置した
ことを検知するまで前記昇降装置を連続して動作
させる、 ことを特徴とする給紙装置。[Scope of Claims] 1. A paper feeding section having a paper feeding means, a holding member for storing a paper feeding tray loaded with sheet paper in a substantially horizontal direction movable and in multiple stages in the vertical direction, and a feeding unit for feeding the holding member. A feeder comprising: an elevating device that moves vertically on the side of the paper section; and a pull-out device that pulls out a paper feed tray located at the entrance of the paper feed section in a substantially horizontal direction and guides the paper feed tray below the paper feeding means. In the paper device, the holding member holds and stores the lowest paper feed tray in advance in a pulled out position, and a first detection device detects that the selected paper feed tray is located at the entrance of the paper feed section; a second detection device that detects that the paper tray has been pulled out below the paper feeding device; and a third detection device that detects that the pulled out paper feed tray has moved to the operating position of the paper feeding device. , a control means for controlling the operations of the elevating device and the drawer device based on signals from the first, second, and third detection devices, and the control means controls the paper feed trays other than the lowest one. a first mode in which the lowest paper feed tray is selected; and a second mode in which the lowest paper feed tray is selected; in the first mode, the lifting device is energized based on the paper feed tray selection signal to When the first detection device detects that the selected paper feed tray is located at the entrance of the paper feed section, the elevating device is deenergized, and then the drawer device is energized to perform the second detection. The paper feed tray is pulled out to the paper feed section until the device detects the paper feed tray, and then the elevating device is energized again to move the holding member upward, and the third detection device detects that the paper feed tray is in the paper feeding section. In the second mode, signals from the first and second detection devices are omitted and the third detection device detects that the lowest paper feeding tray is the paper feeding means. A sheet feeding device characterized in that the lifting device is continuously operated until it is detected that the lifting device is located at an operating position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9569586A JPS62255330A (en) | 1986-04-24 | 1986-04-24 | Sheet feed device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9569586A JPS62255330A (en) | 1986-04-24 | 1986-04-24 | Sheet feed device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62255330A JPS62255330A (en) | 1987-11-07 |
| JPH0517136B2 true JPH0517136B2 (en) | 1993-03-08 |
Family
ID=14144631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9569586A Granted JPS62255330A (en) | 1986-04-24 | 1986-04-24 | Sheet feed device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62255330A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7540491B2 (en) * | 2005-06-01 | 2009-06-02 | Hewlett-Packard Development Company, L.P. | Automatic, lockable, engageable and disengageable media tray |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57195049A (en) * | 1981-05-26 | 1982-11-30 | Konishiroku Photo Ind Co Ltd | Cassette replacing device |
| JPS59133144A (en) * | 1982-09-21 | 1984-07-31 | ゼロツクス・コ−ポレ−シヨン | Sheet feeder |
-
1986
- 1986-04-24 JP JP9569586A patent/JPS62255330A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57195049A (en) * | 1981-05-26 | 1982-11-30 | Konishiroku Photo Ind Co Ltd | Cassette replacing device |
| JPS59133144A (en) * | 1982-09-21 | 1984-07-31 | ゼロツクス・コ−ポレ−シヨン | Sheet feeder |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62255330A (en) | 1987-11-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0002229B1 (en) | Sheet feed apparatus | |
| US4714946A (en) | Continuous form feeder for a reproducing machine and process | |
| US7140796B2 (en) | Recording apparatus | |
| EP0429303B1 (en) | Image forming apparatus and roll paper cutting device therefor | |
| JP2019176370A (en) | Image reading device | |
| US3959654A (en) | Dispenser for sheet like material | |
| JPH0517136B2 (en) | ||
| JPH03267226A (en) | Picture image forming device with multistage tray | |
| JP2637661B2 (en) | Laser printer | |
| JPH0517137B2 (en) | ||
| JPS62249839A (en) | Sheet feeder | |
| JP4739139B2 (en) | Paper feeding device and image forming apparatus | |
| US5377972A (en) | Sorter | |
| JP2849433B2 (en) | Multi-stage paper feeder | |
| US5202736A (en) | Image recording equipment having movable tray receiving sheets having images formed thereon | |
| JP3411135B2 (en) | Paper feeder | |
| JPS6259008B2 (en) | ||
| JP3085668B2 (en) | Paper feeder | |
| JP3367014B2 (en) | Image forming device | |
| JPH042512B2 (en) | ||
| JP2774479B2 (en) | Image forming device | |
| JPH06107343A (en) | Paper feeding device | |
| JPH06156757A (en) | Image forming device | |
| JP2001063853A (en) | Sheet feeding device | |
| JPH0367274A (en) | Automatic document circulating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |