JPS5854434Y2 - Paper feeding device - Google Patents

Description

【考案の詳細な説明】 本考案は給紙装置、詳しくは用紙を堆積したトレイを給
紙ローラ等の給紙手段に向けて移動して用紙を給紙ロー
ラに接触させ用紙を一枚毎に給送する給紙装置に関する
ものである。[Detailed description of the invention] This invention is based on a paper feeding device, more specifically, a tray on which paper is piled up is moved toward a paper feeding means such as a paper feeding roller, and the paper is brought into contact with the paper feeding roller, and the paper is fed one by one. The present invention relates to a paper feeding device that feeds paper.

従来、この種の給紙装置としては例えば第１図に示す如
く、トレイ１の底板２を上下可動とし、該底板２にバネ
３で上方に揺動付勢されたレバ４に設けたローラ５を当
接して底板２を上方に移動させ底板２上に堆積した用紙
６を給紙ローラ等の給紙手段７に接触するようにしたも
のが知られている。Conventionally, as shown in FIG. 1, this type of paper feeding device has a bottom plate 2 of a tray 1 that is movable up and down, and a roller 5 provided on the bottom plate 2 on a lever 4 that is biased upward by a spring 3. There is known a device in which the bottom plate 2 is moved upward by contacting the bottom plate 2, and the sheets 6 accumulated on the bottom plate 2 are brought into contact with a paper feeding means 7 such as a paper feeding roller.

しかし、この構造であると底板２上に堆積した用紙６の
量が多い場合と少ない場合とでは用紙６と給紙手段７と
の接触圧が大巾に変化してし！５ので、用紙６を安定し
て給送できないとの不具合を有する。However, with this structure, the contact pressure between the paper 6 and the paper feed means 7 changes greatly depending on whether the amount of paper 6 accumulated on the bottom plate 2 is large or small! 5, there is a problem that the paper 6 cannot be stably fed.

本考案は上記の事情に鑑みなされたものであり、その目
的はトレイに堆積された用紙の量に関係なく用紙と給紙
手段との接触圧を略一定として用紙を安定して給送でき
るようにした給紙装置を提供することである。The present invention was developed in view of the above circumstances, and its purpose is to feed the paper stably by keeping the contact pressure between the paper and the paper feeding means approximately constant regardless of the amount of paper stacked on the tray. It is an object of the present invention to provide a paper feeding device that has the following features.

以下第２図以降を参照して本考案の実施例を説明する。Embodiments of the present invention will be described below with reference to FIG. 2 and subsequent figures.

トレイ１０の底板１１は上下可動となり、該底板１１上
には用紙１２が堆積しである。A bottom plate 11 of the tray 10 is movable up and down, and sheets 12 are deposited on the bottom plate 11.

１３は支軸１４を支点として上下揺動自在に支承された
第ルバであり、該第ルバ１３のボス１３ａにはリンク１
５が突設されかつ第１バネ１６が設けてあって第ルバ１
３は支軸１４を支点として上方に揺動付勢されて所定位
置に揺動すると第ルバ１３は第１ストツパ１７に当接し
てそれ以上上方には揺動されないように構成しである。Reference numeral 13 denotes a first louver that is supported to be vertically swingable about a support shaft 14, and a link 1 is attached to a boss 13a of the second louver 13.
5 is provided protrudingly, and a first spring 16 is provided so that the first lever 1
3 is configured such that when it is urged to swing upward about the support shaft 14 and swings to a predetermined position, the first lever 13 comes into contact with the first stopper 17 and is prevented from swinging upward any further.

前記第ルバ１３の揺動端には第１０−ラ１８が回転自在
に取付けであると共に、第２レバ１９が上下回動自在に
枢支され、該第２レバ１９には第３レバ２０と第２０−
ラ２１とが取付けてあり、該第３レバ２０の先端には第
３０−ラ２２が設けである。A tenth lever 18 is rotatably attached to the swinging end of the first lever 13, and a second lever 19 is pivotally supported to be vertically movable. 20th-
A 30th lever 22 is provided at the tip of the third lever 20.

すなわち、第２レバ１９と第２レバ１９とは支軸２３で
上下回動自在に連結され、該支軸２３に第１０−ラ１８
が設けであると共に、支軸２３に設けた第２バネ２４の
両端部２４ａ 、２４ａが第ｌレバ２３と第２レバ１９
に係止されて第２レバ１９を第ルバ１３に対して上方に
回動付勢してあり、さらに第２レバ１９には第ルバ１３
の上端面１３′ａに当接する第２ストツパ２５が設けら
れて第２レバ１９は第ルバ１３に対して直線状位置より
上方には回動できないように構成しである。That is, the second lever 19 and the second lever 19 are connected to each other by a support shaft 23 so as to be movable up and down, and the tenth lever 18 is connected to the support shaft 23.
is provided, and both ends 24a, 24a of the second spring 24 provided on the support shaft 23 are connected to the first lever 23 and the second lever 19.
The second lever 19 is rotated upwardly with respect to the second lever 13 by being engaged with the second lever 13 .
A second stopper 25 is provided which abuts on the upper end surface 13'a of the lever 13, so that the second lever 19 cannot be rotated above the linear position with respect to the second lever 13.

また、第２レバ１９と第３レバ２０とは支軸２６で上下
回動自在に連結され、該支軸２６に前記第２０−ラ２１
が設けであると共に、支軸２６に設けた第３バネ２７０
両端部２７ａ、２７ａが第２レバ１９と第３レバ２０と
に係止されて第３レバ２０を第２レバ１９に対して上方
に回動付勢してあり、さらに第２レバ１９には第３レバ
２０の上端面２０ａに当接する第３ストツパ２８が設け
られて第３レバ２０は第２レバ１９に対して直線状位置
より上方には回動できないように構成しである。The second lever 19 and the third lever 20 are connected to each other by a support shaft 26 so as to be movable up and down, and the second lever 21 is connected to the support shaft 26.
is provided, and a third spring 270 provided on the support shaft 26
Both end portions 27a, 27a are engaged with the second lever 19 and the third lever 20 to urge the third lever 20 to rotate upward relative to the second lever 19, and the second lever 19 is also A third stopper 28 that abuts the upper end surface 20a of the third lever 20 is provided so that the third lever 20 cannot rotate above the linear position relative to the second lever 19.

また、第３レバ２０に第３０−ラ２２が支軸２９を介し
て設けである。Further, a 30th lug 22 is provided on the third lever 20 via a support shaft 29.

前記第１バネ１６、第２バネ２４、第３バネ２７のバネ
力は順次小さくなって用紙１２の量の減少に応じて第２
、第３レバ１９，２０が順次上方に回動するように構成
しである。The spring forces of the first spring 16, the second spring 24, and the third spring 27 gradually become smaller, and the spring force of the first spring 16, second spring 24, and third spring 27 becomes smaller as the amount of paper 12 decreases.
, the third levers 19 and 20 are configured to rotate upward in sequence.

３０は給紙ローラ等の給紙手段であり、底板１１が上方
に回動されることで用紙１２と接触されて一枚毎に順次
給送するように動作する。Reference numeral 30 denotes a paper feeding means such as a paper feeding roller, which comes into contact with the paper 12 when the bottom plate 11 is rotated upward, and operates to sequentially feed the paper 12 one by one.

次に作動を説明する。Next, the operation will be explained.

底板１１上に多量の用紙１２が堆積している時には第２
図に示す如く、第１、第２、第３０−ラ１Ｂ、２１．２
２が底板１１に接触して第ルバ１３が第１バネ１６に抗
して第１ストツパ１Ｔより離隔する下方位置に回動され
る。When a large amount of paper 12 is accumulated on the bottom plate 11, the second
As shown in the figure, 1st, 2nd, 30th-ra 1B, 21.2
2 contacts the bottom plate 11, and the first lever 13 is rotated against the first spring 16 to a lower position away from the first stopper 1T.

これによって底板１１は第１バネ１６のバネ力に応じた
力Ｆ１によって上方に押し上げ回動されて用紙１２は給
紙手段３０に接触して給送される。As a result, the bottom plate 11 is pushed upward and rotated by a force F1 corresponding to the spring force of the first spring 16, and the paper 12 is fed into contact with the paper feeding means 30.

そして、用紙１２が減少して底板１１が上方に移動され
ると第ルバ１３は第１ストツパ１７に当接してそれ以上
上方には回動できないので、第２バネ２４によって第２
レバ１９が第ルバ１３に対して上方に回動し第２バネ２
４に応じた力Ｆ２（Ｆ２＜Ｆｌ）によって底板１１が上
方に押し上げ回動され用紙１２は給紙手段３０に接触し
て給送される。Then, when the number of sheets of paper 12 decreases and the bottom plate 11 is moved upward, the first lever 13 comes into contact with the first stopper 17 and cannot rotate upward any further.
The lever 19 rotates upward relative to the second lever 13 and the second spring 2
The bottom plate 11 is pushed upward and rotated by a force F2 (F2<Fl) according to the rotation angle 4, and the paper 12 is fed into contact with the paper feeding means 30.

（第５図参照）そして更に用紙１２が減少すると第２レ
バ１９は第２ストツパ２５が第ルバ１３の上端面１３ａ
に当接してそれ以上上方に回動できないので第３レバ２
０は第２レバ１９に対して第３バネ２７で上方に回動さ
れ第３バネ２７に応じた力Ｆ３（Ｆｔ＞Ｆ ２ ＞Ｆ
３ ）によって底板１１が上方に押し上げ回動され用紙
１２は給紙手段３０に接触して給送される（第６図参照
） 以上の様に用紙１２の量が減少するにつれて順次弱い力
Ｆ１．Ｆ２．Ｆ３で底板１１が上方に押し上げ回動され
るので、用紙１２と給紙手段３０との接触圧力は略均−
となり安定した給送ができる。(See FIG. 5) When the number of sheets of paper 12 decreases further, the second lever 19 moves so that the second stopper 25
Since it comes into contact with the lever and cannot rotate upward any further, the third lever 2
0 is rotated upward by the third spring 27 with respect to the second lever 19, and a force F3 (Ft>F 2 >F
3), the bottom plate 11 is pushed upward and rotated, and the paper 12 is fed by contacting the paper feeding means 30 (see FIG. 6).As described above, as the amount of paper 12 decreases, the weaker forces F1. F2. Since the bottom plate 11 is pushed upward and rotated at F3, the contact pressure between the paper 12 and the paper feeding means 30 is approximately equal.
This allows stable feeding.

ナオ、以上の実施例ではストッパ１７，２５゜２８を設
けたが第１、第２、第３バネ１６，２４゜２７の値を適
宜に選択することによって第１、第２、第３レバ１３，
１９．２０が所定位置以上は上方に回動しないように構
成しても良い。In the above embodiment, the stoppers 17, 25°28 are provided, but by appropriately selecting the values of the first, second, and third springs 16, 24°27, the first, second, and third levers 13 ，
19.20 may be configured so that it does not rotate upward beyond a predetermined position.

本考案は以上の様に構成したので、用紙１２の量が多い
時には第３、第２、第２レバ２０，１９゜１３が底板１
１に接して第１バネ１６のバネ力に見合う力で押し上げ
られ、用紙１２の量がある程度減少すると第３、第２レ
バ２０，１９が底板１１に接して第２バネ２４のバネ力
に見合う力で押し上げられ、用紙１２の量がさらに減少
すると第３レバ２０が底板１１に接して第３バネ２７の
バネ力に見合う力で押し上げられるので用紙１２の量が
減少しても用紙１２と給紙手段３０との接触圧を略一定
として安定して用紙１２を給送できる。Since the present invention is constructed as described above, when the amount of paper 12 is large, the third, second, and second levers 20, 19° 13 are moved to the bottom plate 1.
1 and is pushed up with a force commensurate with the spring force of the first spring 16, and when the amount of paper 12 decreases to a certain extent, the third and second levers 20, 19 come into contact with the bottom plate 11 and are pushed up with a force commensurate with the spring force of the second spring 24. When the paper 12 is pushed up by force and the amount of paper 12 further decreases, the third lever 20 comes into contact with the bottom plate 11 and is pushed up with a force commensurate with the spring force of the third spring 27. The paper 12 can be stably fed by keeping the contact pressure with the paper means 30 substantially constant.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来例の説明図、第２図は本考案の実施例を示
す全体正面図、第３図は要部平面図、第４図はその正面
図、第５図、第６図は作動説明図である。 １０はトレイ、１１は底板、１２は用紙、１３は第ルバ
、１６は第１バネ、１９は第２レバ２０は第２レバ、２
４．２７は第２、第３バネ、３０は給紙手段。Fig. 1 is an explanatory diagram of a conventional example, Fig. 2 is an overall front view showing an embodiment of the present invention, Fig. 3 is a plan view of main parts, Fig. 4 is a front view thereof, Figs. 5 and 6 are It is an operation explanatory diagram. 10 is a tray, 11 is a bottom plate, 12 is paper, 13 is a lever, 16 is a first spring, 19 is a second lever, 20 is a second lever, 2
4.27 is the second and third spring, and 30 is a paper feeding means.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] トレイ１０の底板１１を押し上げ機構で押し上げて底板
１１上に堆積した用紙１２を給紙手段３０に接触させて
用紙１２を順次給送する給紙装置に釦いて、前記押し上
げ機構を、上下回動自在なる第ルバ１３に第２レバ１９
を上下回動自在に連結し、第２レバ１９に第３レバ２０
を上下回動自在に連結すると共に、第１、第２、第３レ
バ１３．１９，２０を第１、第２、第３バネ１６゜２４
．２７でそれぞれ上方に回動付勢し、第１バネ１６のバ
ネ力を第２バネ２４のバネ力よりも強く、第２バネ２４
のバネ力を第３バネ２７のバネ力よりも強くした構成と
したことを特徴とする給紙装置。Push up the bottom plate 11 of the tray 10 with the push-up mechanism, bring the sheets 12 accumulated on the bottom plate 11 into contact with the paper feed means 30, and press a button on the paper feed device that sequentially feeds the sheets 12, and then move the push-up mechanism up and down. Freely move the second lever 13 to the second lever 19
The third lever 20 is connected to the second lever 19 so as to be movable up and down.
The first, second, third levers 13, 19, 20 are connected to the first, second, third springs 16°24
．． 27, the spring force of the first spring 16 is made stronger than the spring force of the second spring 24, and the spring force of the first spring 16 is stronger than that of the second spring 24.
A paper feeding device characterized in that the spring force of the third spring 27 is made stronger than the spring force of the third spring 27.