JP2697667B2 - Paper feeder - Google Patents

Paper feeder

Info

Publication number
JP2697667B2
JP2697667B2 JP7082660A JP8266095A JP2697667B2 JP 2697667 B2 JP2697667 B2 JP 2697667B2 JP 7082660 A JP7082660 A JP 7082660A JP 8266095 A JP8266095 A JP 8266095A JP 2697667 B2 JP2697667 B2 JP 2697667B2
Authority
JP
Japan
Prior art keywords
cavity
paper
cylinder
suction cup
cavities
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
Application number
JP7082660A
Other languages
Japanese (ja)
Other versions
JPH08277043A (en
Inventor
強 西口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP7082660A priority Critical patent/JP2697667B2/en
Publication of JPH08277043A publication Critical patent/JPH08277043A/en
Application granted granted Critical
Publication of JP2697667B2 publication Critical patent/JP2697667B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Paper Feeding For Electrophotography (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、給紙装置に係り、特
に、画像形成装置等に用いる給紙装置の改良に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeder, and more particularly to an improvement in a paper feeder used in an image forming apparatus or the like.

【0002】[0002]

【従来の技術】この種の画像形成装置において、積層さ
れた用紙を1枚ずつ分離して給紙する用紙分離装置とし
ては、一般に半月状のゴム材等で形成されたピックロー
ラを用い、用紙とピックローラの摩擦係数の差を利用し
て最上位の用紙を1枚だけ分離し、所定の搬送ローラの
方向へ搬送するようにしている。
2. Description of the Related Art In this type of image forming apparatus, as a sheet separating apparatus for separating and feeding stacked sheets one by one, a pick roller generally formed of a half-moon rubber material or the like is used. The uppermost sheet is separated by only one sheet by utilizing the difference in friction coefficient between the sheet and the pick roller, and is conveyed in the direction of a predetermined conveying roller.

【0003】図7は従来における給紙装置の第1の例を
示す概略機能説明図である。図において、ピックローラ
5を回転方向Cに従って回転させることにより、ばね9
により加圧され、積層された用紙6の最上位の用紙7
を、ピックローラ5と用紙7との間の摩擦力によって、
搬送ローラ8の方向へ押し出す。
FIG. 7 is a schematic functional explanatory view showing a first example of a conventional paper feeding apparatus. In the figure, by rotating the pick roller 5 in the rotation direction C, the spring 9
And the uppermost sheet 7 of the stacked sheets 6
By the frictional force between the pick roller 5 and the paper 7
It is extruded in the direction of the conveying roller 8.

【0004】しかしながら、このような方法では、最上
位の紙とその他の紙との摩擦力の微妙なバランスにより
一枚だけ搬送されるのであるために、このバランスが崩
れた場合には、複数枚一度に搬送されることになる。
However, in such a method, only one sheet is conveyed due to the delicate balance of the frictional force between the top paper and the other papers. They will be transported at once.

【0005】図7に示された第1の従来例の上記欠点を
解消する為の技術として、特開平2−169421号公
報に示される用紙分離方法(第2の従来例)が提案され
た。
As a technique for solving the above-mentioned disadvantages of the first conventional example shown in FIG. 7, a paper separating method (second conventional example) disclosed in Japanese Patent Application Laid-Open No. 2-169421 has been proposed.

【0006】この特開平2−169421号公報に開示
された第2の従来技術は、用紙カセット内に積層状に収
納された用紙の最上紙面に密接離可能に設けられた吸盤
および最上紙面を検知するセンサと、前記吸盤が用紙を
吸着するために吸盤内の圧力を負圧にする減圧手段と、
前記吸盤およびセンサを回動させる昇降機構および回動
機構とを備えた給紙装置にあって、前記昇降機構の作動
によりセンサが最上紙面を検知するまで吸盤を下降さ
せ、センサが最上紙面を検知したときに、用紙の給紙方
向に対して吸盤位置よりも後方に位置する回転中心の回
りに、前記回動機構でもって吸盤が紙面に接触するまで
吸盤を回動させると共に、減圧手段を作動させて吸盤に
より用紙を吸引し、次いで、その状態から回動機構によ
り吸盤を前記とは逆方向に回動させ、さらに、昇降機構
により吸盤を上昇させることを特徴とした給紙装置にお
ける紙分離方法、である。
A second prior art disclosed in Japanese Patent Application Laid-Open No. 2-169421 detects a sucker and an uppermost sheet surface which are provided so as to be able to come close to and separate from the uppermost sheet surface of sheets stacked in a sheet cassette. And a pressure reducing means for reducing the pressure in the suction cup to a negative pressure so that the suction cup absorbs the paper,
In a paper feeder including a lifting mechanism and a rotation mechanism for rotating the suction cup and the sensor, the suction cup is lowered by operation of the lifting mechanism until the sensor detects the top paper, and the sensor detects the top paper Then, the suction mechanism is rotated by the rotation mechanism until the suction cup comes into contact with the paper surface around the rotation center located behind the suction cup position with respect to the paper feeding direction, and the pressure reducing means is activated. Then, the paper is sucked by the suction cup, and then the suction cup is rotated in the opposite direction by the rotation mechanism from that state, and the suction cup is further raised by the lifting mechanism, thereby separating the paper in the paper feeding device. The way.

【0007】しかるに、上記第2の従来技術は、用紙分
離に際し、回動機構の回動動作を一気に行っていたの
で、用紙が完全に分離される前に次の行程の給送ローラ
に受け渡され、用紙が重送されるという問題があった。
この重送により、例えば、用紙の無駄を生じ、また、用
紙カセット内の用紙残量が数枚になったときに、吸盤の
回動動作により残り全用紙がめくり上げられ、エンプテ
ィセンサが動作することがあった。
In the second prior art, however, the rotating operation of the rotating mechanism is performed at a stretch when the paper is separated. Therefore, before the paper is completely separated, the paper is transferred to the feed roller in the next stroke. Thus, there is a problem that sheets are multi-fed.
Due to this double feeding, for example, paper is wasted, and when the number of remaining papers in the paper cassette becomes several, all the remaining papers are turned up by the rotation of the suction cup, and the empty sensor operates. There was something.

【0008】上記第2の従来技術の上記課題を解決する
為に、特開平3−205235号公報に開示された用紙
分離方法(第3の従来例)が提案された。
In order to solve the above-mentioned problems of the second prior art, a paper separating method (third conventional example) disclosed in Japanese Patent Application Laid-Open No. 3-205235 has been proposed.

【0009】この第3の従来技術は、用紙カセット内に
積層状に収納された用紙の最上位紙面に密接離可能に設
けられた吸盤と、前記最上位紙面を検知するセンサと、
前記吸盤が用紙を吸着するために吸盤内圧力を負圧にせ
しめる減圧手段と、前記吸盤およびセンサを昇降・回動
させる昇降機構および回動機構とを備えた給紙装置の紙
分離方法であって、前記昇降機構の作動によりセンサが
最上位紙面を検知するまで吸盤を下降させ、センサが最
上位紙面を検知したときに、前記吸盤を回転中心の回り
に前記回動機構により回動させると共に、減圧手段を作
動させて吸盤により用紙を吸引し、その状態から前記回
動機構により吸盤を前記回動方向とは逆方向に回動させ
て紙を分離する給紙装置における紙分離方法において、
前記吸盤が一旦紙を吸引して僅少角度回動したときに前
記吸盤の回動動作を停止し、その位置で前記吸盤を暫時
保持した後に所定角度回動させ、給紙装置から紙を分離
させるようにしたことを特徴とする給紙装置における紙
分離方法、である。
The third prior art discloses a sucker provided so as to be able to come into close contact with and separate from the uppermost paper surface of paper sheets stacked in a paper cassette, a sensor for detecting the uppermost paper surface,
A paper separating method for a paper feeder, comprising: a pressure reducing means for reducing the pressure in the suction cup to a negative pressure so that the suction cup absorbs paper; and a lifting mechanism and a rotation mechanism for lifting and rotating the suction cup and the sensor. Then, by operating the lifting mechanism, the suction cup is lowered until the sensor detects the top paper, and when the sensor detects the top paper, the suction cup is rotated around the rotation center by the rotation mechanism. In a paper separating method in a paper feeding device for operating a decompression unit to suck a sheet by a suction cup, and in that state, turning the suction cup in a direction opposite to the turning direction by the turning mechanism to separate the sheet,
When the suction cup once sucks the paper and turns by a small angle, the rotation of the suction cup is stopped, and the suction cup is temporarily held at that position and then rotated by a predetermined angle to separate the paper from the paper feeding device. And a paper separating method in the paper feeding device.

【0010】上記第1〜第3の従来技術の他に、第2、
第3の従来例に類似した第4〜第7の従来例として、特
開平2−169422号、特開平3−147639号、
特開平3−293234号、特開平4−20437号公
報に開示された技術をあげることができる。
In addition to the first to third prior arts, a second,
As fourth to seventh conventional examples similar to the third conventional example, JP-A-2-169422, JP-A-3-147439,
Techniques disclosed in JP-A-3-293234 and JP-A-4-20437 can be mentioned.

【0011】[0011]

【発明が解決しようとする課題】しかしながら、上記第
2〜第7の従来技術の殆どが構造及び動作が複雑であっ
て、特に、上記昇降機構及び回動機構が複雑であり、装
置が大型化すると共に、構造が複雑化するために障害発
生の確立も高く、期待される程良好な用紙分離機能を実
現することが困難であった。
However, most of the above-mentioned second to seventh prior arts have complicated structures and operations, and in particular, the above-mentioned elevating mechanism and rotating mechanism are complicated, and the apparatus is increased in size. At the same time, the occurrence of troubles is high due to the complicated structure, and it has been difficult to realize a good paper separation function as expected.

【0012】本発明は従来の上記実情に鑑がみてなされ
たものであり、従って本発明の目的は、従来の技術に内
在する上記諸欠点を解消することを可能とした新規な給
紙装置を提供することにある。
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and an object of the present invention is to provide a novel paper feeder which can eliminate the above-mentioned drawbacks inherent in the prior art. To provide.

【0013】[0013]

【課題を解決するための手段】上記目的を達成するため
に、本発明に係る給紙装置は、ピックローラの周面に複
数個の吸盤を設け、これらの吸盤内部の気圧を負圧にす
る構成としている。
In order to achieve the above object, a paper feeder according to the present invention is provided with a plurality of suction cups on a peripheral surface of a pick roller, and the pressure inside these suction cups is reduced to a negative pressure. It has a configuration.

【0014】即ち、本発明においては、前記ピックロー
ラの内部に常時負圧を維持する第1の空洞と、この第1
の空洞と連通され前記ピックローラの円周部に複数個形
成された第2の空洞を設け、前記第1の空洞から選択的
に負圧を受けるように前記第2の各空洞に前記各吸盤を
配設している。
That is, in the present invention, a first cavity which always maintains a negative pressure inside the pick roller,
A plurality of second cavities formed in a circumferential portion of the pick roller, the plurality of second cavities being provided in communication with the plurality of cavities, and the suction cups being provided in the second cavities so as to selectively receive a negative pressure from the first cavities. Is arranged.

【0015】また、前記第2の各空洞に、弾性材料によ
り形成された円柱と、該円柱に一端が接触し他端に前記
吸盤を接続された円筒とを嵌入し、前記円柱と円筒とを
前記第2の空洞内で機密摺動するようにしている。
A cylinder formed of an elastic material and a cylinder having one end in contact with the cylinder and the suction cup connected to the other end are fitted into each of the second cavities, and the cylinder and the cylinder are separated from each other. It is arranged to slide confidentially in the second cavity.

【0016】さらにまた、前記円筒の長手方向に第3の
空洞を形成すると共に、該第3の空洞とほぼ直交する孔
を設け、前記円柱の短縮により前記吸盤が前記円筒の孔
及び第3の空洞を介して前記第1の空洞から負圧を受け
るようにしている。
Still further, a third cavity is formed in the longitudinal direction of the cylinder, and a hole substantially perpendicular to the third cavity is provided. By shortening the cylinder, the suction cup is formed by the hole of the cylinder and the third hole. A negative pressure is received from the first cavity via the cavity.

【0017】[0017]

【実施例】以下、本発明をその好ましい一実施例につい
て図面を参照しながら具体的に説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be specifically described below with reference to the drawings.

【0018】図1は本発明の一実施例を示す概略断面
図、図2は本発明に係るピックローラの内部構造を説明
する概略部分断面図、図3は図1のA−A′線に沿って
切断し矢印の方向に見たピックローラの断面図、図4
(a)は本発明に係る円柱の斜視図、図4(b)、
(c)は本発明に係る円筒の断面図、図4(d)は本発
明に係る吸盤の平面図、図4(e)は本発明に係る吸盤
の断面図、図5は本発明の機能を説明するための部分断
面図である。
FIG. 1 is a schematic cross-sectional view showing an embodiment of the present invention, FIG. 2 is a schematic partial cross-sectional view illustrating the internal structure of a pick roller according to the present invention, and FIG. FIG. 4 is a sectional view of the pick roller cut along the line and viewed in the direction of the arrow.
(A) is a perspective view of a cylinder according to the present invention, FIG.
4C is a cross-sectional view of the cylinder according to the present invention, FIG. 4D is a plan view of the suction cup according to the present invention, FIG. 4E is a cross-sectional view of the suction cup according to the present invention, and FIG. FIG. 4 is a partial cross-sectional view for explaining the method.

【0019】図1〜図5を参照するに、参照符号1はピ
ックローラ(分離ローラ)を示し、このピックローラ1
の両端には給紙装置本体(図示せず)に設けられた軸受
(図示せず)に回転自在に枢着される軸11、12が固
着されている(図3参照)。
Referring to FIGS. 1 to 5, reference numeral 1 denotes a pick roller (separation roller).
Shafts 11 and 12 rotatably mounted on bearings (not shown) provided on a paper feeding device main body (not shown) are fixed to both ends of the sheet feeding device (not shown) (see FIG. 3).

【0020】ピックローラ1の円周に沿った内部には空
洞13が形成され、この空洞13は軸12の長手方向に
設けられた空洞12aと連通されている。空洞12aは
排気手段(図示せず)に接続されている。
A cavity 13 is formed along the circumference of the pick roller 1, and the cavity 13 communicates with a cavity 12 a provided in the longitudinal direction of the shaft 12. The cavity 12a is connected to exhaust means (not shown).

【0021】ピックローラ1の円周面には、図2に示さ
れる如く、空洞13に連通されかつ外方に開放された複
数個(本実施例においては図1に示される如く8個(図
においては2個のみ示され、他は一点鎖線で略記されて
いる))の空洞(穴)14が等間隔に形成されている。
これらの各空洞14には、図4(a)〜(c)に示され
た円柱2及び円筒3が嵌入されている。円筒3の一端に
は吸盤4が装着されている。
As shown in FIG. 2, the circumferential surface of the pick roller 1 has a plurality (in the present embodiment, eight (8) as shown in FIG. , Only two are shown, and the others are abbreviated by alternate long and short dash lines.)) (Cavities) 14 are formed at equal intervals.
The cylinder 2 and the cylinder 3 shown in FIGS. 4A to 4C are fitted into these cavities 14. A suction cup 4 is attached to one end of the cylinder 3.

【0022】ピックローラ1の空洞14の最も奥に嵌入
される円柱2は、弾力性のある、耐摩耗性の高い材料、
例えば、ゴム、スポンジ等により構成されている。円柱
2の代わりにコイルばね等のばね材も使用することが可
能である。次に嵌入される円筒3の長手方向内側には空
洞31が形成され、この空洞31とほぼ直角方向には空
洞31と連通する孔32が設けられている。円筒3の他
端には例えばゴム等により形成された吸盤4が図示の如
く装着されている。
The cylinder 2 inserted into the innermost part of the cavity 14 of the pick roller 1 is made of an elastic, highly wear-resistant material.
For example, it is made of rubber, sponge, or the like. A spring material such as a coil spring can be used instead of the column 2. A cavity 31 is formed inside the cylinder 3 to be fitted next in the longitudinal direction, and a hole 32 communicating with the cavity 31 is provided in a direction substantially perpendicular to the cavity 31. A suction cup 4 made of, for example, rubber or the like is attached to the other end of the cylinder 3 as shown in the figure.

【0023】円柱2の上面2aと下面2bとに例えば接
着剤が施され、ピックローラ1の空洞14内で円柱2と
円筒3とが気密性を保持されて摺動できるように構成さ
れている。
For example, an adhesive is applied to the upper surface 2a and the lower surface 2b of the cylinder 2 so that the cylinder 2 and the cylinder 3 can slide in the cavity 14 of the pick roller 1 while maintaining airtightness. .

【0024】ピックローラ1の空洞13の内部の気圧は
作動中常時負圧に設定されている。本発明は以上のよう
に構成されており、本発明の動作について図1〜図6を
参照して以下に説明する。
The air pressure inside the cavity 13 of the pick roller 1 is always set to a negative pressure during operation. The present invention is configured as described above, and the operation of the present invention will be described below with reference to FIGS.

【0025】図1は本発明の機能の説明図であり、ピッ
クローラ1が矢印Bの方向に回転しており、このピック
ローラ1の周面に等間隔に円柱2及び円筒3を介して配
設された複数個の吸盤4が、それに従って回転する。吸
盤4が自由な状態にあるとき、即ち積層用紙6に達する
までは、図5に示したように円筒3の孔32はブロック
16の気密摺動部分にあり、空洞13の負圧の影響を受
けない。
FIG. 1 is an explanatory view of the function of the present invention. The pick roller 1 is rotating in the direction of arrow B, and is arranged on the peripheral surface of the pick roller 1 at equal intervals via a cylinder 2 and a cylinder 3. The provided plurality of suction cups 4 rotate accordingly. When the suction cup 4 is in a free state, that is, before reaching the laminated paper 6, the hole 32 of the cylinder 3 is in the hermetically sliding portion of the block 16 as shown in FIG. I do not receive.

【0026】しかしながら、吸盤4が積層された用紙6
の上までくると、ばね9により加圧された積層用紙6に
よって吸盤4は押され、図6に示した通り、円柱2は弾
力性があるために短縮し、円筒3がその分だけピックロ
ーラ1の中心部方向に押されて、円筒3の孔32がピッ
クローラ1の空洞13まで押し出されると、円筒3の空
洞31はピックローラ1内の空洞13と連通される。空
洞13の気圧は負圧であるから図6の矢印にて示すよう
に円筒3内の空気が吸引され、その結果、吸盤4は積層
用紙6の最上位の用紙7を吸引する。この状態でピック
ローラ1が図1の矢印B方向に回転するために、吸盤4
は、用紙7を吸引吸着したまま回転し、用紙7を送り出
して搬送ローラ8へ供給する。
However, the paper 6 on which the suction cups 4 are stacked
Above, the suction cup 4 is pushed by the laminated paper 6 pressed by the spring 9, and as shown in FIG. 6, the cylinder 2 is shortened due to its elasticity, and the cylinder 3 is reduced by the When the hole 32 of the cylinder 3 is pushed toward the cavity 13 of the pick roller 1 by being pushed toward the center of the cylinder 1, the cavity 31 of the cylinder 3 is communicated with the cavity 13 in the pick roller 1. Since the air pressure in the cavity 13 is a negative pressure, the air in the cylinder 3 is sucked as shown by the arrow in FIG. 6, and as a result, the suction cup 4 sucks the uppermost sheet 7 of the laminated sheet 6. In this state, the pick roller 1 rotates in the direction of arrow B in FIG.
Rotates while sucking and adsorbing the sheet 7, and sends out the sheet 7 to supply it to the transport roller 8.

【0027】 吸盤5から用紙6が離れると、外気が一
気に負圧状態の空洞13に入るので、負圧による円筒3
の吸引力が弱まり、円柱2の弾性力によって円筒3は外
側に移動し、円筒3の空洞31が空洞13と遮断され
て、図5の状態に戻る。
When the paper 6 is separated from the suction cup 5, the outside air enters the cavity 13 in a negative pressure state at a stretch.
Is weakened, the cylinder 3 moves outward by the elastic force of the cylinder 2, the cavity 31 of the cylinder 3 is cut off from the cavity 13, and the state returns to the state of FIG.

【0028】[0028]

【発明の効果】以上説明したように、本発明によれば、
極めて簡単な構成によって確実に一枚ずつ給紙すること
が可能となり、従来技術に見られるような不具合が発生
せず、大きな効果を期待することができる。
As described above, according to the present invention,
With an extremely simple configuration, it is possible to feed one sheet at a time without fail, and a great effect can be expected without the disadvantages as in the prior art.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明に係る給紙装置の一実施例を示す機能概
略断面図である。
FIG. 1 is a schematic functional cross-sectional view illustrating an embodiment of a sheet feeding device according to the present invention.

【図2】本発明に係るピックローラ本体の内部構造を示
す部分断面図である。
FIG. 2 is a partial sectional view showing an internal structure of a pick roller main body according to the present invention.

【図3】図1のA−A′線に沿って切断し矢印の方向に
見た、本発明に係るピックローラの機能を表す断面図で
ある。
FIG. 3 is a cross-sectional view showing a function of the pick roller according to the present invention, taken along line AA ′ of FIG. 1 and viewed in a direction of an arrow.

【図4】(a)は本発明に係る円柱の斜視図であり、
(b)は本発明に係る円筒の側面断面図、(c)は本発
明に係る円筒の正面断面図であり、(d)は本発明に係
る吸盤の平面図、(e)は本発明に係る吸盤の側面断面
図である。
FIG. 4A is a perspective view of a cylinder according to the present invention,
(B) is a side sectional view of the cylinder according to the present invention, (c) is a front sectional view of the cylinder according to the present invention, (d) is a plan view of the suction cup according to the present invention, and (e) is the present invention. It is a side sectional view of such a suction cup.

【図5】本発明の機能を表す部分断面図である。FIG. 5 is a partial sectional view showing functions of the present invention.

【図6】本発明の機能を表す部分断面図である。FIG. 6 is a partial sectional view illustrating functions of the present invention.

【図7】従来例を説明する概略説明図である。FIG. 7 is a schematic explanatory diagram illustrating a conventional example.

【符号の説明】[Explanation of symbols]

1…ピックローラ 11、12…軸 13…空洞 14…空洞(穴) 15、16…ブロック 2…円柱 2a…上面 2b…底面 3…円筒 31…空洞 32…孔 4…吸盤 5…従来のピックローラ 6…積層された用紙 7…最上位の用紙 8…搬送ローラ 9…ばね 10…側板 DESCRIPTION OF SYMBOLS 1 ... Pick roller 11, 12 ... Shaft 13 ... Cavity 14 ... Cavity (hole) 15, 16 ... Block 2 ... Column 2a ... Top surface 2b ... Bottom surface 3 ... Cylinder 31 ... Cavity 32 ... Hole 4 ... Suction cup 5 ... Conventional pick roller 6 ... Laminated paper 7 ... Top paper 8 ... Conveying roller 9 ... Spring 10 ... Side plate

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 給紙カセット内に積層状に収納された用
紙の搬送方向に回転可能に軸支されその内側に常時負圧
を維持する第1の空洞及び該第1の空洞と連通されその
円周部に複数個形成された第2の空洞が設けられたピッ
クローラと、前記第1の空洞から選択的に負圧を受ける
ように前記第2の各空洞にそれぞれ配設された各吸盤と
を具備し、該吸盤を前記用紙の最上位紙面に密着させて
前記用紙を負圧吸引後に前記ピックローラを回転させて
該用紙をめくることにより分離し、前記分離された用紙
の先端を搬送ローラへ送り込む給紙装置において、前記
第2の各空洞に、弾性材料により形成された円柱と、該
円柱に一端が接着剤を介して接触し他端に前記吸盤を接
続された円筒とを嵌入すると共に、前記円柱と円筒とを
前記第2の空洞内で機密摺動するように構成し、かつ前
記円筒の長手方向に第3の空洞を形成すると共に、該第
3の空洞とほぼ直交する孔を設け、前記円柱の短縮によ
り前記吸盤が前記円筒の孔及び第3の空洞を介して前記
第1の空洞から負圧を受けることを特徴とする給紙装
置。
1. A first cavity rotatably supported in a conveying direction of sheets stacked in a sheet cassette in a conveying direction, and a first cavity inside which a negative pressure is always maintained, and a first cavity communicated with the first cavity. A pick roller provided with a plurality of second cavities formed in a circumferential portion, and suction cups respectively disposed in the second cavities so as to selectively receive a negative pressure from the first cavities. The suction cup is brought into close contact with the uppermost paper surface of the paper, and after suctioning the paper under negative pressure, the pick roller is rotated to separate the paper by turning the paper, and the leading end of the separated paper is transported. In the paper feeding device for feeding to a roller, a cylinder formed of an elastic material and a cylinder having one end in contact with the cylinder via an adhesive and the other end connected to the suction cup are fitted into the second cavities. And at the same time, connect the cylinder and the cylinder in the second cavity. Configured to slide confidential , and before
A third cavity is formed in the longitudinal direction of the cylinder and the third cavity is formed.
A hole that is substantially perpendicular to the cavity 3 is provided.
The suction cup is inserted through the cylindrical hole and the third cavity.
A sheet feeding device receiving a negative pressure from a first cavity .
JP7082660A 1995-04-07 1995-04-07 Paper feeder Expired - Lifetime JP2697667B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7082660A JP2697667B2 (en) 1995-04-07 1995-04-07 Paper feeder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7082660A JP2697667B2 (en) 1995-04-07 1995-04-07 Paper feeder

Publications (2)

Publication Number Publication Date
JPH08277043A JPH08277043A (en) 1996-10-22
JP2697667B2 true JP2697667B2 (en) 1998-01-14

Family

ID=13780600

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7082660A Expired - Lifetime JP2697667B2 (en) 1995-04-07 1995-04-07 Paper feeder

Country Status (1)

Country Link
JP (1) JP2697667B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106241439B (en) * 2016-09-29 2018-01-02 河南省新斗彩印刷有限公司 Semi-automatic die cutting machine automatic document feeder
CN107777395A (en) * 2017-11-17 2018-03-09 海盐创美印业有限公司 A kind of rotary printing paper feeder
CN107720352A (en) * 2017-11-17 2018-02-23 海盐创美印业有限公司 A kind of printing paper feeder easy to use

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS542546U (en) * 1977-06-04 1979-01-09

Also Published As

Publication number Publication date
JPH08277043A (en) 1996-10-22

Similar Documents

Publication Publication Date Title
JP2697667B2 (en) Paper feeder
JP2000103535A (en) Sheet feeder
JP2003237969A (en) Sheet feeder and image processor
JP2788382B2 (en) Paper feeder
JPH0859001A (en) Method and equipment for supplying printing medium
US5931635A (en) Device for removing flat articles from a stack
JPS61254438A (en) Sheet feeder
EP1036751A2 (en) A sheet feeding machine
JP2728403B2 (en) Paper feeder
JP2003261212A (en) Supply method of blank material of press, and roller conveyer used for it
JP2603302B2 (en) Sheet feeding device
JPS63143131A (en) Paper feeder
JP2006082887A (en) Lithographic printing forme feeder
JPH1045262A (en) Medicine bag feeder
JPS6387436A (en) Medium delivering method
JP2000313538A (en) Sheet separating/feeding device and image forming device provided with the same
JPH05338831A (en) Paper feeding device
JPS6137636A (en) Sheet conveying system in character sensing equipment
JPH047225A (en) Paper feeder in image forming device
JPH03293235A (en) Paper feeding device for image forming device
JP3002244U (en) Paper feeder
JP2000086001A (en) Conveying roller with dust collecting function and paper sheet conveying device
JPH0249242Y2 (en)
JPS6293143A (en) Method of sucking paper sheet in vacuum corrugation feeder
JPH02261753A (en) Automatic turnover device for stacked printing paper