JPS63180635A - Sheet conveyor - Google Patents

Sheet conveyor

Info

Publication number
JPS63180635A
JPS63180635A JP62010172A JP1017287A JPS63180635A JP S63180635 A JPS63180635 A JP S63180635A JP 62010172 A JP62010172 A JP 62010172A JP 1017287 A JP1017287 A JP 1017287A JP S63180635 A JPS63180635 A JP S63180635A
Authority
JP
Japan
Prior art keywords
sheet
paper feed
clutch
turned
skew
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.)
Pending
Application number
JP62010172A
Other languages
Japanese (ja)
Inventor
Hiroshi Yukimachi
行待　博司
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP62010172A priority Critical patent/JPS63180635A/en
Publication of JPS63180635A publication Critical patent/JPS63180635A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/002—Registering, e.g. orientating, articles; Devices therefor changing orientation of sheet by only controlling movement of the forwarding means, i.e. without the use of stop or register wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2220/00—Function indicators
    • B65H2220/09—Function indicators indicating that several of an entity are present
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/33—Modifying, selecting, changing orientation
    • B65H2301/331—Skewing, correcting skew, i.e. changing slightly orientation of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2403/00—Power transmission; Driving means
    • B65H2403/70—Clutches; Couplings
    • B65H2403/72—Clutches, brakes, e.g. one-way clutch +F204
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B65H2511/24—Irregularities, e.g. in orientation or skewness

Abstract

PURPOSE:To straighten a skewed sheet approximately in front of a resist roller as well as to remedy the skew to the full by the resist roller, by installing paper feed rollers independently drivable right and left and sheet tip detecting sensors in a sheet conveyor for a copying machine or the like. CONSTITUTION:When a sheet S is conveyed askew, a sheet tip is reached to a sheet tip detecting sensor 10, and a clutch 4 is turned to OFF in a moment, thus a paper feed roller 2 comes to a stop. Since a paper feed roller 3 is rotating, the sheet tip is reached to another sheet tip detecting sensor 11, whereby a clutch 5 comes off, and the paper feed roller 3 is stopped, thus the skew is almost remedied. After these paper feed rollers 2 and 3 are completely stopped, a clutch 7 is turned to OFF, successively these clutches 4 and 5 are turned to ON, and afterward, the clutch 7 is turned on again. With this sequence, these paper feed rollers 2 and 3 are simultaneously rotated, and thereby the sheet S is reached to resist rollers 13 and 14 in an almost nonskew state, then the skew is yet more straightened.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は複写機、プリンタ等のシート搬送装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sheet conveying device for a copying machine, a printer, etc.

［従来の技術］ 従来の給紙装置では、給紙ローラは一木の軸に複数の給
紙ローラか取り付けられ、各ローラとも完全に同時に駆
動のオン、オフがされるため，給紙時に斜行が発生した
場合、シートは斜行したままレジストローラに到達した
。一方、レジストローラの斜行取り能力には限界かある
ため、ある程度以上に斜行したシートの斜行を取ること
は非常に困難てあった。[Prior art] In conventional paper feeding devices, multiple paper feeding rollers are attached to a single wooden shaft, and each roller is turned on and off at the same time, so that there is no skew when feeding paper. When a row occurs, the sheet reaches the registration rollers while being skewed. On the other hand, since there is a limit to the ability of the registration rollers to remove skew, it is extremely difficult to correct the skew of a sheet that has been skewed beyond a certain level.

［発明の目的］ 本発明により給紙時の大斜行かほぼ取れるほか、本方式
により斜行取りをした後、さらにレジストローラを通す
ことで完全に斜行か矯正される。[Object of the Invention] According to the present invention, not only can large skews during sheet feeding be almost completely removed, but also skews can be completely corrected by passing the paper through registration rollers after the skew is removed by this method.

［実施例コ 第１〜第３図に本発明の実施例を示す。第１図に於て、
１はシート積載カセット、２は左給紙ローラ、３は右給
紙ローラてあり、それぞれギアを介して左給紙クラッチ
４、右給紙クラッチ５により独立して駆動のオン、オフ
か可能になっている。クラッチ４，５は１本の駆動軸６
に取り付けられ、軸６はクラッチ７を介してモーター８
により駆動されている。９はタイミングベルトである。[Example 1] Figures 1 to 3 show examples of the present invention. In Figure 1,
1 is a sheet loading cassette, 2 is a left paper feed roller, and 3 is a right paper feed roller, each of which can be turned on and off independently by a left paper feed clutch 4 and a right paper feed clutch 5 via gears. It has become. Clutches 4 and 5 are connected to one drive shaft 6
The shaft 6 is connected to a motor 8 via a clutch 7.
is driven by. 9 is a timing belt.

一方、左右給紙ローラ２，３のシート搬送方向下流には
左、右紙先端検知センサ１０，１１が設けられている。On the other hand, left and right paper leading edge detection sensors 10 and 11 are provided downstream of the left and right paper feed rollers 2 and 3 in the sheet conveyance direction.

また、１２はシートガイド面テアリ、１３．１４はレジ
ストローラ対、１５はシート分離爪である。Further, 12 is a sheet guide surface tearer, 13 and 14 are a pair of registration rollers, and 15 is a sheet separation claw.

第４図には本発明による給紙のシーケンスを示す。給紙
開始時にはクラッチ４，５．７がオンとなり、給紙ロー
ラ２，３か駆動する。その結果、積載されているシート
のうち最上部の１枚か分離爪１５により分離されるが、
この瞬間に最も斜行が発生しやすい。FIG. 4 shows a paper feeding sequence according to the present invention. At the start of paper feeding, the clutches 4, 5, 7 are turned on, and the paper feeding rollers 2, 3 are driven. As a result, the top one of the stacked sheets is separated by the separation claw 15, but
Oblique movement is most likely to occur at this moment.

いま、シートＳか斜行して搬送されたとする（第２図）
。この場合、シート先端は、まずシート先端検知センサ
（左）１０に達し、この瞬間フランチ４かオフとなり、
給紙ローラ２か停止する（第４図のａ）。給紙ローラ３
は回転しているので間もなくシート先端検知センサ（右
）１１ヘシート先端が達しく第３図）、この瞬間クラッ
チ５がオフとなり給紙ローラ３か停止し、はぼ斜行か矯
正される（第４図のｂ）。Now, assume that sheet S is conveyed diagonally (Figure 2)
. In this case, the sheet leading edge first reaches the sheet leading edge detection sensor (left) 10, and at this moment the flange 4 is turned off.
The paper feed roller 2 stops (a in Fig. 4). Paper feed roller 3
As the sheet is rotating, the leading edge of the sheet will soon reach the sheet leading edge detection sensor (right) 11 (Fig. 3).At this moment, the clutch 5 will be turned off, the paper feed roller 3 will stop, and the skewed or skewed paper will be corrected (Fig. 4). Figure b).

給紙ローラ４，５か完全に停止した後、クラッチをオフ
としく第４図のｃ）、続いてクラッチ４．５をオンとし
く第４図のｄ）、その後、クラッチ７を再びオンとする
（第４図のｅ）。After paper feed rollers 4 and 5 have completely stopped, turn off the clutch (c) in Figure 4, then turn on clutch 4.5 (d) in Figure 4, and then turn on clutch 7 again. (Fig. 4 e).

このシーケンスにより給紙ローラ２，３は個々のクラッ
チの立上り時間ズレ等のタイムラグなく同時に回転し、
シートＳはほぼ斜行のない状態てレジストローラ対１３
．１４に達し、斜行はさらに矯正される。With this sequence, the paper feed rollers 2 and 3 rotate simultaneously without any time lag such as a difference in the rise time of each clutch,
The sheet S is in a state with almost no skew, and the registration roller pair 13
．． 14, and the skew is further corrected.

前述実施例てはシート先端検知センサは２個であったか
、あらゆるサイズのシートに対して有効に斜行を矯正す
るためには、紙サイズに応じた位置に多数のセンサを設
けることか望ましく、また給紙ローラも紙サイズに応し
た位置に自動シフトすることか望ましい。In the above embodiment, there were two sheet leading edge detection sensors, but in order to effectively correct skew for sheets of all sizes, it is desirable to provide a large number of sensors at positions corresponding to the paper size. It is also desirable that the paper feed roller automatically shift to a position corresponding to the paper size.

また近年ては本実施例て示したような爪によるシート分
離方式よりも、爪なしシート分離方式か多く用いられる
傾向かあるか、この方式の場合には第５図に示すように
、給紙部にとレジストローラ対１３．１４の間に本発明
による左右一対の斜行矯正ローラ１６（前記実施例では
給紙ローラ）とセンサｉｏ、ｉｔを設は斜行を矯正する
ことが有効である。In addition, in recent years, there has been a tendency to use a sheet separation method without claws more than the sheet separation method using claws as shown in this embodiment.In the case of this method, as shown in FIG. It is effective to correct the skew by providing a pair of left and right skew correction rollers 16 (paper feed rollers in the above embodiments) and sensors io and it between the register roller pair 13 and 14. .

［発明の効果］ 以上説明したように、シート搬送方向に対して左右独立
した駆動のてきる給紙ローラとシート先端検知センサを
用いることで、大きく斜行したシートかレジストローラ
に到達する前に、はぼ斜行のない状態に矯正でき、さら
にレジストローラで斜行を取ることて十分な斜行取りか
てきるという効果がある。[Effects of the Invention] As explained above, by using a paper feed roller that can be driven independently on the left and right sides in the sheet conveyance direction and a sheet leading edge detection sensor, it is possible to detect a sheet that is significantly skewed before it reaches the registration rollers. This has the effect that the skew can be corrected to a state without any skew, and that the skew can be sufficiently removed by using the registration rollers.

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

第１図〜第３図は本発明の実施例を示す図であり、第４
図はそのシーケンスを示す図である。第５図はその他の
実施例を示す図である。 １は用紙カセット、２．３は給紙ローラ、４．５．７は
クラッチ、８はモータ、１０゜１１はシート先端検知セ
ンサ、１３．１４はレジストローラ、１５はシート分離
爪である。FIGS. 1 to 3 are diagrams showing embodiments of the present invention, and FIG.
The figure shows the sequence. FIG. 5 is a diagram showing another embodiment. 1 is a paper cassette, 2.3 is a paper feed roller, 4.5.7 is a clutch, 8 is a motor, 10.degree. 11 is a sheet leading edge detection sensor, 13.14 is a registration roller, and 15 is a sheet separation claw.

Claims (3)

【特許請求の範囲】[Claims] （１）シート搬送方向に対して直角方向の軸のまわりに
回転する独立した２個の給紙ロー ラが設けられ、それぞれ独立したクラッチ により駆動のオン、オフが可能であり、こ れら２個の給紙ローラのシート搬送方向下 流側に設けられた独立した２個のシート先 端検知センサにより、前述各給紙ローラの クラッチのオン、オフ動作が制御可能な シート搬送装置。(1) Two independent paper feed rollers are provided that rotate around axes perpendicular to the sheet conveyance direction, and each of these two feed rollers can be turned on and off by an independent clutch. A sheet conveying device in which the on/off operation of the clutch of each paper feed roller can be controlled by two independent sheet leading edge detection sensors provided on the downstream side of the paper roller in the sheet conveying direction. （２）シート検知センサーがシート先端を検知した瞬間
に各センサ上流側に設けられた給 紙ローラの駆動が独立して切られることを 特徴とする前記特許請求の範囲第１項に記 載のシート搬送装置。(2) The sheet according to claim 1, wherein the drive of the paper feed roller provided upstream of each sensor is independently cut off at the moment when the sheet detection sensor detects the leading edge of the sheet. Conveyance device. （３）前述２個の給紙ローラがいずれも完全に停止した
後、再び２個の給紙ローラが同時 に等速で駆動し、シートを搬送することを 特徴とする前述特許請求の範囲第１項に記 載のシート搬送装置。(3) After both of the two paper feed rollers have completely stopped, the two paper feed rollers are simultaneously driven again at a constant speed to convey the sheet. The sheet conveyance device described in section.
JP62010172A 1987-01-20 1987-01-20 Sheet conveyor Pending JPS63180635A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62010172A JPS63180635A (en) 1987-01-20 1987-01-20 Sheet conveyor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62010172A JPS63180635A (en) 1987-01-20 1987-01-20 Sheet conveyor

Publications (1)

Publication Number Publication Date
JPS63180635A true JPS63180635A (en) 1988-07-25

Family

ID=11742861

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62010172A Pending JPS63180635A (en) 1987-01-20 1987-01-20 Sheet conveyor

Country Status (1)

Country Link
JP (1) JPS63180635A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5094442A (en) * 1990-07-30 1992-03-10 Xerox Corporation Translating electronic registration system
JPH0484239U (en) * 1990-11-29 1992-07-22
US5324021A (en) * 1990-09-19 1994-06-28 Omron Corporation Fuzzy control device to feed and adjust sheets of paper
US5775682A (en) * 1995-05-22 1998-07-07 De La Rue International Limited Sheet transfer member having at least one outwardly opening sheet-receiving slot and sheet withdrawl portion and apparatus including such a member
US5899448A (en) * 1995-07-27 1999-05-04 De La Rue International Limited Sheet feeding apparatus and method
EP1034125A1 (en) * 1997-11-28 2000-09-13 Diebold, Incorporated Document alignment mechanism for currency recycling automated banking machine
EP1980511A2 (en) 2007-03-20 2008-10-15 Konica Minolta Business Technologies, Inc. Image forming apparatus
CN108137254A (en) * 2015-12-08 2018-06-08 惠普发展公司有限责任合伙企业 Medium skew correction
JP2020152542A (en) * 2019-03-20 2020-09-24 株式会社Pfu Medium transport device, control method and control program
US11472649B2 (en) 2019-03-20 2022-10-18 Pfu Limited Medium conveying apparatus for controlling feeding a medium

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5094442A (en) * 1990-07-30 1992-03-10 Xerox Corporation Translating electronic registration system
US5324021A (en) * 1990-09-19 1994-06-28 Omron Corporation Fuzzy control device to feed and adjust sheets of paper
JPH0484239U (en) * 1990-11-29 1992-07-22
US5775682A (en) * 1995-05-22 1998-07-07 De La Rue International Limited Sheet transfer member having at least one outwardly opening sheet-receiving slot and sheet withdrawl portion and apparatus including such a member
US5899448A (en) * 1995-07-27 1999-05-04 De La Rue International Limited Sheet feeding apparatus and method
EP1034125B1 (en) * 1997-11-28 2013-03-20 Diebold, Incorporated Document alignment mechanism for currency recycling automated banking machine
EP1034125A1 (en) * 1997-11-28 2000-09-13 Diebold, Incorporated Document alignment mechanism for currency recycling automated banking machine
EP1980511A2 (en) 2007-03-20 2008-10-15 Konica Minolta Business Technologies, Inc. Image forming apparatus
EP1980511A3 (en) * 2007-03-20 2010-01-06 Konica Minolta Business Technologies, Inc. Image forming apparatus
US8099037B2 (en) 2007-03-20 2012-01-17 Konica Minolta Business Technologies, Inc. Image forming apparatus
CN108137254A (en) * 2015-12-08 2018-06-08 惠普发展公司有限责任合伙企业 Medium skew correction
JP2020152542A (en) * 2019-03-20 2020-09-24 株式会社Pfu Medium transport device, control method and control program
US11472649B2 (en) 2019-03-20 2022-10-18 Pfu Limited Medium conveying apparatus for controlling feeding a medium
US11884506B2 (en) 2019-03-20 2024-01-30 Pfu Limited Medium conveying apparatus for correcting a skew of a medium using three sensors

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