EP0561308B1 - Dispositif avec un convoyeur et des receveurs de feuilles - Google Patents

Dispositif avec un convoyeur et des receveurs de feuilles Download PDF

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Publication number
EP0561308B1
EP0561308B1 EP93104102A EP93104102A EP0561308B1 EP 0561308 B1 EP0561308 B1 EP 0561308B1 EP 93104102 A EP93104102 A EP 93104102A EP 93104102 A EP93104102 A EP 93104102A EP 0561308 B1 EP0561308 B1 EP 0561308B1
Authority
EP
European Patent Office
Prior art keywords
release
gripper
grippers
arm
arms
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
EP93104102A
Other languages
German (de)
English (en)
Other versions
EP0561308A1 (fr
Inventor
Robert M. Silva
Frank J. Tomko
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.)
Muller Martini Mailroom Systems Inc
Original Assignee
Graphic Management Associates 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 Graphic Management Associates Inc filed Critical Graphic Management Associates Inc
Publication of EP0561308A1 publication Critical patent/EP0561308A1/fr
Application granted granted Critical
Publication of EP0561308B1 publication Critical patent/EP0561308B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/003—Delivering or advancing articles from machines; Advancing articles to or into piles by grippers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/50—Gripping means
    • B65H2405/58—Means for achieving gripping/releasing operation

Definitions

  • the invention presents a device with a conveyor and grippers for holding individual, generally planar products in a traveling direction, each gripper comprising a first gripper arm and a second gripper arm being movable toward each other into a closed gripping position, wherein the gripper arms exert an clamping force on the products, being movable away from one another into an open release position, wherein said grippers release said products, a clamping force of a bias biasing the gripper arms of each gripper towards said closed position is effective.
  • the device is intended for use in connection with the conveyance of printed products such as newspapers.
  • US-A-4 512 457 presents a conveyor with grippers having jaws.
  • the jaws of the grippers are involved in both rotating and moving toward each other and against the action of a spring.
  • these jaws like those of US-A-4 381 056 are biased toward the open position.
  • Two motions are necessary, axial separation of the jaws of the gripper and rotation thereof about the axis, to release the product.
  • the gripper since the gripper is biased open, it is necessary to have some means for holding the gripper closed during the vast bulk of its travel.
  • the present invention is intended to overcome the foregoing difficulties; namely to accurately and reliably open the grippers at the proper point with reaction time allowing to deposite the papers at the proper time and in the appropriate location.
  • the device of the invention has a short reaction time and is far more efficient than the prior art in that the bias into the closed position allows the gripper to move freely throughout almost all of its path for only at the depositing and pickup points the opening is required. Only when the gripper comes to the pickup or deposit point there is need for a rocker cam to open it.
  • the release of the present invention is intended to be used in connection with grippers which clamp a newspaper between a first arm and a second arm.
  • the grippers are spring biased toward the closed position and may be opened by pressure on a release arm connected to the movable gripper arm.
  • the retaining cam which is adapted to bear against the gripper and hold it in the open position is furthermore effective and useful because it takes with its length a finite amount of time for the product, for example a newspaper, to drop out of the gripper arms. Since the speed is very high (more than 20 copies per second), merely opening the gripper would not allow this to occur. The opening of the gripper against the clamping force together with the features of the rocker arm and the retaining cam allows the device to work accurately and reliable.
  • the gripper release is actuated by a rocker arm which has an operative position, wherein it urges the gripper into the open position and into contact with the retaining cam, and a closed position, wherein it is inactive and does not cause the gripper to open.
  • the device comprises a plurality of first grippers sequently followed by a plurality of second grippers, the first grippers alternating with the second grippers. In this way it is in combination with the solenoid activation of the rocker cam possible to activate the release of the grippers selectively.
  • the opening will be advantageous effected by a selectively solenoid activated movement of the rocker cam.
  • the selective solenoid activation is controllable by switches, located at the depositing and pickup points.
  • the opening action therefore is definite controllable.
  • the possibility of a selective opening of the grippers allows to release them alternately.
  • conveyor 1 is provided with a plurality of grippers 2.
  • Each gripper 2 comprises fixed arm 3, movable arm 4, and a pair of release arms 10, one located on each side of gripper 2.
  • first alternate grippers 13 have rollers 15 which project to the right as shown in Figure 2.
  • Second alternate grippers 14 have rollers 20 which project to the left as shown in Figure 2.
  • Complementary to rollers 15 and 20 are pairs of rocker cams 8 and 17, actuated by corresponding pairs of solenoids 6 and 7. Each rocker arm 8 and 17 has cam surface 9 thereon.
  • solenoids 6 or 7 are activated, thereby moving rocker cams 8 or 17 into their operative position. If the gripper to be released is one of first alternate grippers 13, solenoids 6 (and hence rocker cams 8) are actuated; on the other hand, if the gripper selected is one of second alternate grippers 14, then solenoids 7 (and hence rocker cams 17) are activated.
  • solenoids 6 are activated to cause rocker cams 8 to assume the operative position as shown in full lines in Figure 1. Roller 15, contacting cam surface 9 of rocker cam 8 is forced downward (as shown in Figure 1) and beneath retaining cam 18. As it continues to move, retaining cam 18 holds the gripper open so that paper 50 has an opportunity to drop out.
  • first alternate grippers 13 have rollers 15 extending to the right as shown in Figure 2.
  • Second alternate grippers 14 are provided with rollers 20 which extend in the opposite direction.
  • the device is shown releasing all of grippers 2.
  • pairs of solenoids 6 and 7 and hence rocker cams 8 and 17
  • Roller 15 has just completed its contact with cam surface 9 of rocker arms 8. The other roller 15 is not shown.
  • roller 20 on second alternate gripper 14 is approaching cam surface 9 of rocker cam 17. At the point shown, it has not yet been forced downward.
  • First proximity switches 16 and 51 and second proximity switches 52 and 53 are provided adjacent rocker cams 8 and 17 to detect the presence of rollers 15 and 20.
  • First alternate grippers 13 constitute the odd grippers and second alternate grippers 14 are the even grippers.
  • the control and timing of actuation of solenoids 6 and 7 are shown diagrammatically in Figure 5.
  • Proximity switches 16 and 51 upon registering the presence of an odd gripper send pulses 38, 39, 40, 41, 42, and 43 to the release point control.
  • Proximity switches 52 and 53 send even gripper pulses 24, 25, 26, 27, and 28 to the release point control. Assuming that there is a request to discharge the newspapers from the even grippers, leading edge 29 of gripper pulse 25 is detected by the release point control.
  • Scan time 34 is required for first release point control 54 to recognize that pulse 25 is that of an even gripper.
  • gripper release control 56 which is programmed so that two conditions must be fulfilled before it is activated. First, it must receive the release point signal from the release point control and, second, it must register the leading edge 30 of the next even gripper pulse 26. Since the scan time of the gripper release control is on the order of 1 millisecond, the reaction time is virtually non existent The fulfillment of the second condition causes the gripper control to activate the release signal 32 and send it to the appropriate solenoids. This signal continues until inactivation point 35. The cycle is repeated as desired. The release of the odd gripper pulses is carried out in exactly the same way.
  • the present invention provides a means for selectively releasing grippers, which does not require high speed mechanical equipment which is likely to be unreliable. It is possible to release the newspapers virtually at will and substantially without any misses or errors. They can be released singly, alternately, or entirely as is desired by the operator.

Claims (19)

  1. Dispositif comprenant un convoyeur (1) et des pinces (13, 14) destinées à maintenir des produits individuels globalement plats (50) dans une direction de transport, chaque pince (13, 14) comprenant un premier bras (3) de pince et un second bras (4) de pince, ledit premier bras de pince et ledit second bras de pince (4) pouvant être déplacés l'un vers l'autre jusqu'en une position fermée d'agrippement, dans laquelle les bras (3, 4) de pince exercent une force de serrage sur le produit (50), et pouvant être écartés l'un de l'autre dans une position ouverte de relâchement, dans laquelle lesdites pinces relâchent lesdits produits, une force de rappel de serrage étant active, qui rappelle les bras (3, 4) de pince de chaque pince (13, 14) dans ladite position fermée,
    caractérisé par
    - une force de relâchement supérieure à ladite force de serrage agissant sur chaque pince (13, 14), cette force agissant à l'encontre de la force de rappel et amenant les pinces concernées (13, 14) dans ladite position ouverte,
    - au moins un culbuteur (8, 17) pouvant être déplacé d'une position inactive jusqu'en une position active,
    - le culbuteur (8, 17), lorsqu'il se trouve dans sa position active, forçant ladite pince (13, 14) en position ouverte, la forçant en contact avec au moins une came de maintien (18),
    - la came de maintien (18) étant conçue pour maintenir la pince concernée (13, 14) dans ladite position ouverte pendant une durée suffisante pour permettre au produit d'être totalement libéré de la pince (13, 14).
  2. Dispositif selon la revendication 1, comprenant au moins un bras de relâchement (10) aménagé sur chacune desdites pinces (13, 14), qui est destiné à recevoir ladite force de relâchement et à transmettre ladite force de relâchement auxdites pinces (13, 14).
  3. Dispositif selon la revendication 1, caractérisé en ce que ledit premier bras (3) de pince est stationnaire, et que ledit second bras (4) de pince est mobile.
  4. Dispositif selon la revendication 2, dans lequel ledit bras de relâchement (10) comporte un galet de relâchement (15, 20) agencé à son extrémité distale, ledit galet de relâchement (15, 20) étant destiné à recevoir ladite force de relâchement et à transmettre ladite force de relâchement à son bras de relâchement (10).
  5. Dispositif selon la revendication 2, dans lequel existent une paire desdits bras de relâchement (10), respectivement un bras de chaque côté de chaque pince (13, 14), des paires desdits culbuteurs (8, 17), destinées à appuyer sur chacun desdits bras de relâchement (10), et deux desdites cames de maintien (18), destinées à maintenir lesdits bras de relâchement (10) et lesdites pinces (13, 14) dans ladite position ouverte.
  6. Dispositif selon la revendication 1, comprenant des vérins de commande (6, 7) destinés à déplacer lesdits culbuteurs (8, 17) entre ladite position active et ladite position inactive.
  7. Dispositif selon la revendication 6, dans lequel existent des paires desdits vérins de commande (6, 7), destinées à déplacer lesdites paires de culbuteurs (8, 17) entre ladite position active et ladite position inactive.
  8. Dispositif selon l'une quelconque des revendications 1 à 7, dans lequel lesdites pinces (13, 14) comprennent des premières pinces (13), auxquelles succèdent des secondes pinces (14), et chaque pince parmi lesdites premières et secondes pinces (13, 14) comprenant des galets de relâchement (15, 20) montés sur lesdites paires de bras de relâchement (10), respectivement un galet de chaque côté des pinces (13, 14), les galets de relâchement (15) montés sur les bras de relâchement des premières pinces (13) faisant saillie dans une première direction, qui est transversale par rapport à ladite direction de transport (20), les galets de relâchement (15) montés sur lesdits bras de relâchement (10) des secondes pinces (14) faisant saillie dans une deuxième direction, qui est transversale par rapport à ladite direction de transport (20) et différente de ladite première direction, les premières paires de culbuteurs (8) étant destinées à appuyer sur ladite première paire de galets de relâchement (15) lorsque les culbuteurs se trouvent dans ladite position active, et les secondes paires de culbuteurs (17) étant destinées à appuyer sur lesdites secondes paires de galets de relâchement (20) lorsque les culbuteurs se trouvent dans ladite position active.
  9. Dispositif selon la revendication 8, dans lequel ladite première direction est opposée à ladite deuxième direction.
  10. Dispositif selon la revendication 8, comprenant un capteur (16) de proximité, adjacent audit culbuteur (8, 17), destiné à détecter la présence dudit bras de relâchement (10) et à envoyer un signal de proximité à un dispositif de commande, qui est conçu pour activer le vérin de commande (6, 7).
  11. Dispositif selon la revendication 10, comprenant des capteurs (16) de proximité, respectivement adjacents à l'un des culbuteurs desdites paires de culbuteurs (8), l'un desdits capteurs de proximité (16) étant conçu pour détecter la présence de chacun desdits bras de relâchement (10) et à envoyer un signal de proximité à un dispositif de commande, qui est conçu pour activer l'un desdits vérins de commande (6, 7).
  12. Dispositif selon la revendication 10, comprenant
    - un premier capteur de proximité (16), adjacent à l'un des culbuteurs de ladite première paire de culbuteurs (8) et destiné à détecter la présence de l'un des bras de ladite première paire de bras de relâchement (10), et à émettre un premier signal de proximité sur la base de cette détection,
    - un deuxième capteur de proximité (16), adjacent à l'un des culbuteurs de ladite deuxième paire de culbuteurs (17) et destiné à détecter la présence de l'un des bras de ladite deuxième paire de bras de relâchement (10), et à émettre un deuxième signal de proximité sur la base de cette détection,
    - un premier dispositif de commande du point de relâchement, conçu pour recevoir un premier signal de proximité et un deuxième signal de proximité, et pour distinguer ces deux signaux, ledit premier dispositif de commande du point de relâchement étant conçu pour envoyer un premier signal correspondant, basé sur ledit premier signal de proximité, à un dispositif de commande de relâchement des pinces,
    - ledit dispositif de commande des pinces étant conçu pour recevoir ledit premier signal correspondant et pour recevoir un premier signal de commande de relâchement, qui pilote le relâchement de ladite première pince (13), ledit dispositif de commande des pinces étant conçu pour envoyer un premier signal de fonctionnement à ladite première paire de vérins de commande, de manière à relâcher ladite première pince (13).
  13. Dispositif selon la revendication 8, comprenant plusieurs desdites premières pinces (13), auxquelles succèdent plusieurs desdites secondes pinces (14), lesdites premières pinces (13) et lesdites secondes pinces (14) se succédant en alternance.
  14. Dispositif selon la revendication 12, dans lequel ledit premier dispositif de commande du point de relâchement envoie ledit premier signal correspondant, basé sur ledit premier signal de proximité, en avance par rapport au premier signal de proximité qui correspond à ladite première pince (13) à relâcher.
  15. Dispositif selon la revendication 12, dans lequel
    - un second dispositif de commande du point de relâchement est conçu pour envoyer un deuxième signal correspondant, basé sur ledit second signal de proximité, audit dispositif de commande de relâchement de la pince,
    - ledit dispositif de commande de relâchement de la pince étant conçu pour recevoir ledit second signal correspondant et pour recevoir un deuxième signal de commande de relâchement qui pilote le relâchement de ladite seconde pince (14), ledit dispositif de commande de la pince étant destiné à envoyer un deuxième signal de fonctionnement à ladite seconde paire de vérins de commande (7) de manière à relâcher ladite seconde pince (14).
  16. Dispositif selon la revendication 15, dans lequel ledit premier dispositif de commande du point de relâchement est adjacent audit second dispositif de commande du point de relâchement.
  17. Dispositif selon la revendication 15, dans lequel ledit premier dispositif de commande du point de relâchement et ledit second dispositif de commande du point de relâchement forment une seule commande de relâchement.
  18. Dispositif selon la revendication 12, dans lequel ledit second dispositif de commande du point de relâchement envoie ledit second signal correspondant, basé sur un second signal de proximité, en avance par rapport au second signal de proximité qui correspond à ladite seconde pince (14) à relâcher.
  19. Dispositif selon la revendication 1, dans lequel lesdits culbuteurs (8, 17) pivotent autour d'un point intermédiaire situé entre leurs extrémités, entre ladite position active et ladite position inactive.
EP93104102A 1992-03-17 1993-03-13 Dispositif avec un convoyeur et des receveurs de feuilles Expired - Lifetime EP0561308B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US85267592A 1992-03-17 1992-03-17
US852675 1993-01-13

Publications (2)

Publication Number Publication Date
EP0561308A1 EP0561308A1 (fr) 1993-09-22
EP0561308B1 true EP0561308B1 (fr) 1996-07-24

Family

ID=25313947

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Application Number Title Priority Date Filing Date
EP93104102A Expired - Lifetime EP0561308B1 (fr) 1992-03-17 1993-03-13 Dispositif avec un convoyeur et des receveurs de feuilles

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Country Link
EP (1) EP0561308B1 (fr)
AT (1) ATE140682T1 (fr)
DE (1) DE69303743T2 (fr)
DK (1) DK0561308T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE506416C2 (sv) * 1995-02-24 1997-12-15 Wamag Idab Ab Förfarande och anordning för att identifiera och återfinna en gripare i en griparetransportör för tryckeriprodukter
US6039317A (en) * 1996-11-05 2000-03-21 Grapha-Holding Ag Gripper releasing device signature conveyor
ES2232238B1 (es) * 2002-08-02 2006-07-16 Cantabrico 95, S.L. Metodo para controlar transportadores de imprentas.
WO2023138688A1 (fr) * 2022-01-21 2023-07-27 武山(上海)餐饮有限公司 Pince mécanique de cuillère de poudre à café dotée d'une fourche de gobelet

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH592562A5 (fr) * 1974-05-28 1977-10-31 Ferag Ag
CH644816A5 (de) * 1980-02-08 1984-08-31 Ferag Ag Foerdereinrichtung, inbesondere fuer druckprodukte, mit an einem umlaufenden zugorgan verankerten greifzangen.
DE3361987D1 (en) * 1982-06-02 1986-03-13 Ferag Ag Device for transporting continuously supplied flat paper products

Also Published As

Publication number Publication date
DE69303743D1 (de) 1996-08-29
DK0561308T3 (da) 1996-12-02
ATE140682T1 (de) 1996-08-15
EP0561308A1 (fr) 1993-09-22
DE69303743T2 (de) 1996-12-12

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