EP0000366B1 - Dispositif d'alimentation en feuilles - Google Patents

Dispositif d'alimentation en feuilles Download PDF

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Publication number
EP0000366B1
EP0000366B1 EP78100292A EP78100292A EP0000366B1 EP 0000366 B1 EP0000366 B1 EP 0000366B1 EP 78100292 A EP78100292 A EP 78100292A EP 78100292 A EP78100292 A EP 78100292A EP 0000366 B1 EP0000366 B1 EP 0000366B1
Authority
EP
European Patent Office
Prior art keywords
suction chamber
feeding device
shaft
cam
sheet 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
Application number
EP78100292A
Other languages
German (de)
English (en)
Other versions
EP0000366A1 (fr
Inventor
Herbert Blum
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.)
Hoechst AG
Original Assignee
Hoechst AG
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 Hoechst AG filed Critical Hoechst AG
Publication of EP0000366A1 publication Critical patent/EP0000366A1/fr
Application granted granted Critical
Publication of EP0000366B1 publication Critical patent/EP0000366B1/fr
Expired legal-status Critical Current

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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
    • B65H3/00—Separating articles from piles
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/12—Suction bands, belts, or tables moving relatively to the pile
    • B65H3/122—Suction tables

Definitions

  • the invention relates to a sheet feed device for the automatic feeding of single sheets with a displaceable perforated plate from a stack to a device, with lower transport rollers and upper transport rollers which bear elastically against the transport rollers.
  • Such a sheet feed device is known from US Pat. No. 1,435,205, in which a perforated plate which is displaceable in the transport direction of the individual sheets of a stack is provided.
  • This perforated plate can be pushed back and forth in guides which are arranged on the lower edges of two opposite walls of a vacuum chamber.
  • the guides have enough play up and down so that the perforated plate can be moved up and down vertically.
  • the air is sucked out of the vacuum chamber via a pipe which is connected to a line which leads to the suction opening of a blower, a vacuum pump or another air suction device.
  • a fan is not provided in this known device.
  • US Pat. No. 3,226,108 relates to a sheet feed device having a cylindrical chamber which is arranged below a stacking table for the sheet or card material to be conveyed and has a bore which receives a piston which can be moved back and forth with a bore.
  • the front part of the piston carries a suction chamber with a perforated cover plate, which in its front position projects into a gap between an upper and a lower transport roller.
  • the bore of the piston communicates with a suction pump and with an opening leading to the atmosphere as it moves. Due to the vacuum in the piston, the material to be transported is held on the perforated cover plate during the forward movement and when the transport rollers and rollers reach the front edge of the material, this is released in that the vacuum is released.
  • a suction fan is known from US Pat. No. 3,610,577, which is seated on a plate in which a suction opening for the fan is made. This plate can only be moved vertically, but not in the horizontal direction.
  • U.S. Patent 2,859,964 describes a drive mechanism for pushing an intake manifold back and forth.
  • the drive mechanism includes a drive shaft that carries two pulleys of different diameters.
  • the smaller diameter pulley drives a transport roller via a drive belt, while the other pulley drives a shaft that carries a cam.
  • the shaft encloses a fork-like end of an arm which supports a sheet transport device which bears against the lower side of the sheet stack.
  • DE-OSen 2 026 063, 2 365 228 and 2 343 133 describe gripper devices which either have individual gripper fingers or a clamping strip with a number of gripper fingers or movable gripper jaws.
  • a conveying device for a copying machine in which the original to be copied is occasionally fed from a stack to a support surface of an exposure station by means of conveyor belts and then conveyed by conveyor belts to a storage stack.
  • a first switchable conveyor device takes over the separated original and feeds it to the support surface by means of a reversible belt conveyor device which is set in motion by a reversible drive device.
  • the known transport devices have in common a master drum, which is equipped with individually integrated gripper fingers or with a rigid gripper bar running over the drum surface, with the help of which the front edge of the original to be transported is held in place during the rotation of the master drum, or the template is transported by Conveyor belts.
  • the known transport devices mentioned are built-in components of a copying or reproducing device and, as such, are not suitable in terms of their construction and function as such for feeding originals from outside an input point of a device in which the originals are further processed.
  • the object of the invention is to provide a sheet feeding device with which an input point of a device can be fed exactly from a stack of single sheets, which can also have different weights, avoiding double and multiple feeding.
  • a displaceable in the transport direction of the individual sheets of a stack suction chamber consists of a cover plate and the perforated plate as a base plate that guide projections for the sheet to be transported are provided on the front of the suction chamber over the width of the sheet feeder, and that the cover plate is provided with a suction opening for a fan arranged thereon above the suction opening.
  • the guide projections lie tangentially on the lower edge of a shaft in the advanced position of the suction chamber. Furthermore lie the guide projections opposite the section of the shaft between two adjacent transport rollers or the section between a wall which laterally delimits the suction chamber and the adjacent transport roller.
  • the suction chamber is expediently limited laterally by the two vertical walls and can be moved between them.
  • Each wall has a slot running in the transport direction, in each of which a slide roller and a stop slide roller are guided, which extend laterally into the slots from the side walls of the suction chamber.
  • This configuration ensures that the suction chamber is guided along the slots via the sliding rollers and the stop sliding rollers, the forward movement of the suction chamber being limited by the stop sliding rollers as soon as they abut the ends of the slots.
  • a support rod running parallel to the support plate is connected at its ends to the walls and a spring is attached at one end to the support rod and at the other end to a bolt of the fan housing.
  • This spring serves as a return spring for the suction chamber moved in the transport direction.
  • One embodiment of the invention is designed such that a drive motor is fastened to the inside of one wall, the drive shaft being guided through the wall to the outside and carrying two toothed belt pulleys with different diameters, of which the larger toothed belt pulley drives a toothed belt pulley via a toothed belt, which sits on a common shaft with a gear drive, which sets the shaft arranged at the output of the sheet feed device with the transport rollers in motion, and that the smaller toothed belt pulley drives a toothed belt pulley via a toothed belt, which is fixedly connected to a cam on a shaft.
  • the cam bears against a cam roller, which sits on the outside of the wall on the same axis as the slide roller and, during one revolution, shifts the suction chamber over the cam roller against the tensile force of the spring in the transport direction once by a cam length.
  • This configuration ensures that the uppermost sheet of the stack sucked in by the fan is advanced so far in the transport direction that the front edge of this sheet is gripped by the transport rollers and transport rollers and transported further.
  • a drive motor is fastened to the inside of one wall, the drive shaft of which is guided through the wall and on which sits a toothed belt pulley which drives a belt drive, which acts as an endless toothed belt via a toothed belt pulley seated on the shaft with the transport rollers and is guided over a toothed belt pulley which is firmly connected to the cam.
  • This drive mechanism represents a structural simplification compared to the drive mechanism described above.
  • the advantages are achieved that the suction of a single sheet while feeding the same ensures a safe and trouble-free individual feed to a device such as a facsimile machine and that the ease of use of such a device is increased by the automatic loading.
  • Another advantage is that the sheet feeder to a facsimile machine can be reduced in cost by automatically sending during a low-fee period for the lines used by the facsimile machine for transmission without personnel, such as when the sheet feeder is used triggered automatically by a timer.
  • FIGS. 1 and 2 show a side and a front view of a sheet feed device 1 which has a suction chamber 3 which can be displaced in the transport direction A.
  • a fan 4 sits on a cover plate 22 of the suction chamber 3 in a fan housing 14 and is connected to the electrical power supply in a manner not shown.
  • a suction opening 21 for the fan 4 shown in FIG. 3 is provided in the cover plate 22.
  • the base plate of the suction chamber 3 is designed as a perforated plate 2, so that during operation of the fan 4 through the perforated plate 2, a constant air draft is directed upwards, which lifts the sheet 13 lying on top from a stack 16.
  • the suction chamber 3 has the shape of a flat box, which can be moved with its side walls between vertical walls 23, 24.
  • the walls 23, 24 form a right angle with a support plate 27 a, which receives the stack 16 of sheets 13, and are connected to this.
  • the length and the width of the support plate 27 are chosen according to the largest sheet format still to be processed.
  • the front or rear edge of the support plate 27 delimits a stop 11 or 11 '.
  • the stop 11 ' is usually arranged at a short distance in front of the rear edge of the support plate 27 and is tangent to the transport rollers 10.
  • the transport rollers 10 usually consist of an elastic material, such as rubber or the like, while the material for the transport rollers 9 is preferably an elastic foam.
  • the support plate 27 is longer than the walls 23, 24, seen in the transport direction A, is deep and extends beyond the walls 23, 24 to the front.
  • a cover 39 which can be provided with holes, for example, covers the sheet feed device 1 from above and also covers as a cover 37 a drive arrangement for the transport rollers 9 and a cam 5 which moves the suction chamber 3 in the transport direction A.
  • a start and a stop button are provided, between which a display, for example in the form of a lamp, is arranged which indicates the start of operation of the sheet feeder after the start button has been pressed and the end of the sheet feeder.
  • the perforated plate 2 of the suction chamber 3 is arranged at a certain distance from the support plate 27, which defines the height of the stack 16 that can be inserted into the sheet feeder 1.
  • a support rod 19 running parallel to the support plate 27 is provided, which is connected at its ends to the walls 23, 24. This can be done, for example, in such a way that the ends of the holding rod 19, which have threads, are passed through holes in the walls 23, 24 and are screwed onto the outer sides of the walls 23, 24 by means of nuts.
  • One end of a spring 7 is hooked onto the mounting rod 19, while the other end of the spring 7 is hooked onto a bolt 15 of the fan housing 14.
  • the spring 7, which runs slightly obliquely to the horizontal, works as a return spring for the suction chamber 3 and pulls it back into the starting position after the forward movement has taken place.
  • a drive motor 8 is provided on the inside of the wall 23, the drive shaft 29 (FIG. 2) of which is guided through the wall 23.
  • a toothed belt pulley 30 which drives a belt drive 17 which is guided as an endless toothed belt via a toothed belt pulley 36 seated on the shaft 38 with the transport rollers 9 and via a further toothed belt pulley 18 which is firmly connected to the cam 5 .
  • This drive arrangement can be seen in FIG. 1, in which the cover 37 shown in FIG. 2 has been removed.
  • the cam 5 is rotated, which bears against a cam roller 6 and, during one revolution, displaces the suction chamber 3 via the cam roller 6 against the tensile force of the spring 7 in the transport direction A by one cam length from the initial position.
  • the cam 5 bears against the cam roller 6, which slides forward in the slot 25 as long as the cam diameter becomes larger.
  • the diameter of the cam 5 resting against the cam roller 6 becomes smaller again, so that the spring 7 can pull the suction chamber 3 back into the starting position.
  • the transport rollers 9 are set in rotation with the movement of the suction chamber 3, which abut against the transport rollers 10 and together with them detect the leading edge of a fed sheet and, for example, convey it to the entry point of a remote copier (not shown).
  • guide projections 20 are provided for the sheet 13 to be transported across the width of the chamber, as the top view according to FIG. 3 shows. These guide projections 20 lie in the advanced position of the suction chamber 3 tangentially on the lower edge of the shaft 38 and ensure an exact grasping and drawing in of the transported sheet by the transport rollers 9 and the transport rollers 10.
  • two transport rollers are shown, but can more than two transport rollers or a single continuous transport roller can also be provided.
  • the guide projections 20 lie opposite the section of the shaft 38 between two adjacent transport rollers 9 or the section between the wall 23 or 24 and the adjacent transport roller 9. This ensures that during the forward movement of the suction chamber 3, the guide projections 20 each have space between two transport rollers 9 or a transport roller 9 and the wall 23 or 24.
  • the suction chamber 3 is guided between the walls 23, 24 in the exemplary embodiment shown in FIGS. 1 to 3 in such a way that a groove 41 extending over the entire length of the wall is provided on the inside of each wall 23, 24 is, with each groove two castors 42 (see Fig. 2 and 3) are engaged.
  • the casters 42 are hori stored zonally between the walls 23, 24 and recesses in the side walls of the suction chamber 3 and ensure an almost smooth movement of the suction chamber 3.
  • each wall 23, 24 has a slot 25, which runs parallel to the support plate 27 and is shorter than the adjacent side wall of the suction chamber 3.
  • Two shafts protrude from the side walls of the suction chamber 3, on which a slide roller 26 and a stop slide roller 28 are seated, which engage in the slots 25 of the walls 23, 24.
  • the stop slide roller 28 limits the forward movement of the suction chamber 3 as soon as it bears against the rear end of the slot 25.
  • a cam roller 5 is seated on the shaft 35 on the outside of the wall 23.
  • a drive motor 8 is also attached to the inside of the wall 23, the drive shaft 29 of which is guided through the wall 23 to the outside.
  • the gear drive 34 consists of two gear wheels, which are connected to one another by a self-contained endless gear chain. The gear drive sets the shaft arranged at the output of the sheet feed device 1 in motion with the transport rollers 9.
  • the smaller toothed belt pulley 31 on the drive shaft 29 drives a toothed belt pulley 40 via a toothed belt 33, which is fixedly connected to the cam 5 on the shaft 35. Due to the rotation of the cam 5, the suction chamber 3 is moved in the manner already described above.
  • a first sheet 13 has been gripped by the stacks 16 by the transport rollers 9 and the transport rollers 10 and has been conveyed to the feed rollers of a downstream device, not shown.
  • the first sheet still partially covers the perforated plate of the suction chamber 3.
  • a second sheet of the stack 16 is sucked in by the uncovered part of the perforated plate of the suction chamber and shows a curved course.
  • the suction chamber 3 is still in its initial position.
  • the suction force of the fan 4 on the second sheet is approximately 70% of the full suction force and increases continuously as the first sheet progresses into the downstream device.
  • the second sheet is more or less curved. Due to the continuously increasing suction power of the fan on the second sheet and the weight of an approximately subsequent third sheet, a separation effect is achieved between these two sheets, which prevents double or multiple feeding of sheets with certainty.
  • the sheet 13 completely covers the perforated plate of the suction chamber 3 and the cam 5 begins to rotate and to shift the slide roller in the transport direction A, as a result of which the suction chamber 3 is moved.
  • the perforated plate ensures a largely wide-area suction with approximately laminar flow, whereby the covering of the edge zones prevents unwanted air vortices that can lead to double or multiple feeding of sheets.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Claims (9)

1. Dispositif d'amenée de feuilles qui, à l'aide d'une plaque perforée mobile, assure le transport automatique de feuilles isolées entre une pile d'alimentation et un appareil et qui comporte des cylindres d'alimentation inférieurs, ainsi que des rouleaux d'alimentation supérieurs qui s'appuient, d'une manière souple, contre ces cylindres d'alimentation inférieurs, caractérisé en ce qu'un compartiment d'aspiration (3) se déplaçant dans le sens des différentes feuilles (13) isolées, prélevées sur une pile (16), se compose d'une plaque de recouvrement (22) et d'une plaque perforée (2) utilisée comme plaque d'assise, en ce que des appendices de guidage (20) chargés de guider les feuilles (13) et équipant le bord antérieur du compartiment d'aspiration (3) s'étendent sur tout la largeur du dispositif d'amenée (1) et en ce que la plaque de recouvrement (22) présente une ouverture d'aspiration pour un ventilateur (4) fixé sur cette plaque, directement au-dessus du ventilateur.
2. Dispositif d'amenée de feuilles selon la revendication 1, caractérisé en ce que les appendices de guidage (20) se situent en position tangentielle sur le bord inférieur d'un axe (38).
3. Dispositif d'amenée de feuilles selon l'une des revendications 1 ou 2, caractérisé en ce que les appendices de guidage (20) sont opposés aux sections libres de l'axe (38) situées entre deux rouleaux d'alimentation (9) voire aussi dans la zone délimitée par l'une ou l'autre des parois (23, 24) constituant la limite latérale du compartiment d'aspiration et le rouleau d'alimentation (9) extrême.
4. Dispositif d'amenée de feuilles selon la revendication 1, caractérisé en ce que le compartiment d'aspiration (3) est limité latéralement par les deux parois verticales (23, 24) entre lesquels il coulisse librement et en ce que chacune de ces parois (23, 24) comporte une rainure (25) qui est ménagée dans le sens du transfert (flèche A) et qui sert de guide à un galet de glissement (26) et à un galet formant taquet (28), lesquels partant des parois latérales du compartiment d'aspiration 3, s'engagent latéralement dans cette rainure (25).
5. Dispositif d'amenée de feuilles selon l'une des revendications 1 à 4, caractérisé en ce qu'une triangle de fixation (19) parallèle à la plateforme d'alimentation (27) est maintenue, par ses extrémités sur les parois latérales (23, 24) et en ce qu'un ressort (7) est accroché par l'une de ses extrémités à cette triangle de fixation (19), alors que l'extrémité opposée est maintenue par un boulon de la cage du ventilateur.
6. Dispositif d'amenée de feuilles selon l'une des revendications 1 à 5, caractérisé en ce que la face extérieure de l'une des parois porte un moteur d'entraînement (8), dont l'axe moteur (29), qui traverse la paroi, est dirigé vers l'extérieur et porte deux poulies (30, 31) pour courroies dentées, de diamètres différents, dont la plus grande (30) entraîne, par l'intermédiaire d'une courroie dentée (32) une autre poulie pour courroie dentée, maintenue sur le même axe qu'un disque denté faisant partie d'un système d'entraînement (34), qui assure la rotation de l'axe (38), lequel se trouve à la sortie du dispositif d'amenée des feuilles (1) et porte les rouleaux d'alimentation (9), alors que la plus petite (31) de ces deux poulies entraîne, par l'intermédiaire d'une courroie dentée (33) une autre poulie dentée (40) équipée d'une came (5) et maintenue sur un axe de rotation.
7. Dispositif d'amenée de feuilles selon la revendication 6, caractérisé en ce que la came (5) s'appuie contre un galet de commande (6) qui, à l'extérieur de la paroi (23) est maintenu sur le même axe que le galet de glissement (26) et en ce que la came (5), en effectuant un tour de rotation, déplace le compartiment d'aspiration (3) par l'intermédiaire du galet de commande (6) et contre l'effort de traction du ressort (7) (flèche A), sur une longueur égale à la longueur de la came.
8. Dispositif d'amenée de feuilles selon l'une des revendications 1 à 5, caractérisé en ce que la face intérieure de l'une des parois (23) porte un moteur d'entraînement (8) dont l'axe moteur (29) traverse la paroi et porte, à l'extérieur de celle-ci, une poulie dentée (30) qui, par l'intermédiaire d'une courroie dentée sans fin (17), entraîne, d'une part, par l'intermédiaire d'un disque denté (36), l'axe (38) porteur des rouleaux d'alimentation (9) et, d'autre part, un disque denté (18) relié fixement à la came (5).
EP78100292A 1977-07-09 1978-07-03 Dispositif d'alimentation en feuilles Expired EP0000366B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19772731095 DE2731095A1 (de) 1977-07-09 1977-07-09 Blattzufuhrvorrichtung
DE2731095 1977-07-09

Publications (2)

Publication Number Publication Date
EP0000366A1 EP0000366A1 (fr) 1979-01-24
EP0000366B1 true EP0000366B1 (fr) 1980-04-30

Family

ID=6013542

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78100292A Expired EP0000366B1 (fr) 1977-07-09 1978-07-03 Dispositif d'alimentation en feuilles

Country Status (7)

Country Link
US (1) US4280691A (fr)
EP (1) EP0000366B1 (fr)
JP (1) JPS5418579A (fr)
AT (1) AT357030B (fr)
CA (1) CA1086342A (fr)
DE (2) DE2731095A1 (fr)
IT (1) IT1105754B (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HUT61622A (en) * 1991-05-08 1993-01-28 Landis & Gyr Betriebs Ag Intermediate card-container
EP0514618B2 (fr) * 1991-05-08 2000-05-10 Mars, Incorporated Stock provisoire
US5803447A (en) * 1996-09-25 1998-09-08 D&K Custom Machine Design, Inc. Method and apparatus for feeding sheets
US7002714B1 (en) * 2000-11-17 2006-02-21 Stephen Neushul Autofeeder for X-ray scanning
US7559549B2 (en) * 2006-12-21 2009-07-14 Xerox Corporation Media feeder feed rate

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1435205A (en) * 1920-02-16 1922-11-14 Harry L Brigham Pneumatic sheet feeder
US2859964A (en) * 1957-02-19 1958-11-11 Theodore F Aronson Sheet feeding mechanism
GB943359A (en) * 1961-11-11 1963-12-04 Deritend Eng Co Improvements relating to suction feed mechanism for corrugated and like cardboard
NL294543A (fr) * 1962-07-09
US3265383A (en) * 1965-04-22 1966-08-09 Eastman Kodak Co Film sheet feeder
US3501138A (en) * 1967-08-30 1970-03-17 Fmc Corp Sheet dispenser
US3610577A (en) * 1969-02-06 1971-10-05 Joseph E Foster Jr Suction feed conveyor
US3614089A (en) * 1969-06-16 1971-10-19 Copystatics Mfg Corp Automatic original feeder for copying machine
US3659838A (en) * 1970-06-12 1972-05-02 J W Hassell Jr Material handling device
US3674367A (en) * 1970-06-15 1972-07-04 Time Inc Method for handling and positioning film

Also Published As

Publication number Publication date
US4280691A (en) 1981-07-28
JPS5418579A (en) 1979-02-10
CA1086342A (fr) 1980-09-23
IT1105754B (it) 1985-11-04
DE2731095A1 (de) 1979-01-11
IT7850201A0 (it) 1978-07-07
AT357030B (de) 1980-06-10
EP0000366A1 (fr) 1979-01-24
DE2857618D1 (en) 1980-06-12

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