DE3630875A1 - Gripping mechanism - Google Patents

Gripping mechanism

Info

Publication number
DE3630875A1
DE3630875A1 DE19863630875 DE3630875A DE3630875A1 DE 3630875 A1 DE3630875 A1 DE 3630875A1 DE 19863630875 DE19863630875 DE 19863630875 DE 3630875 A DE3630875 A DE 3630875A DE 3630875 A1 DE3630875 A1 DE 3630875A1
Authority
DE
Germany
Prior art keywords
gripping mechanism
gripper
cam
disc
cam plate
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.)
Withdrawn
Application number
DE19863630875
Other languages
German (de)
Inventor
Siegmar Tischer
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.)
Brehmer Buchbindereimaschinen GmbH
Original Assignee
Polygraph Leipzig Kombinat Veb
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 Polygraph Leipzig Kombinat Veb filed Critical Polygraph Leipzig Kombinat Veb
Publication of DE3630875A1 publication Critical patent/DE3630875A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00Feeding articles separated from piles; Feeding articles to machines
    • B65H5/08Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers
    • B65H5/12Revolving grippers, e.g. mounted on arms, frames or cylinders

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Discharge By Other Means (AREA)

Abstract

The invention relates to a gripping mechanism for pulling out the bottom-most sheet of paper in a flat stack in machines for the further processing of sheets. The aim of the invention is to develop a gripping mechanism having a gripper which exerts as much pressure as possible, with simultaneous reduction of spikes. To achieve this, a gripping mechanism is to be devised which does not bring about any increase in spring resistance when the gripper is opened. According to the invention this is brought about by arranging the articulation points for the resilient elements on a movably mounted lever with a cam roller and by making the said roller rest against a further cam plate, the maximum eccentricity "e2" of which is arranged so as to be offset with respect to the maximum eccentricity "e1" of the cam plate which interacts with the linkage. <IMAGE>

Description

Die Erfindung betrifft einen Greifmechanismus zum Herausziehen des untersten Papierbogens eines Flachstapels an bogenweiterverarbeitenden Maschinen.The invention relates to a gripping mechanism for pulling out the bottom sheet of a flat stack of sheet finishing Machinery.

Es ist ein Greifmechanismus bekannt, bei welchem der Greifer an einem Koppelgetriebe befestigt ist. Dieses Koppelgetriebe ist auf einer sich drehenden Scheibe angeordnet und arbeitet mit einem Kurvengetriebe zusammen. Die Bewegung des Greifers resultiert dabei aus der Drehung der Scheibe um eine feststehende Kurvenscheibe. Über zwei am An- und Abtriebsglied des Koppelgetriebes wirksamwerdende und auf der sich drehenden Scheibe befestigte Zugfedern wird auf den Greifer eine Kraft übertragen, welche den Papierbogen an die sich drehende Scheibe preßt. Mangelhaft dabei ist, daß das Öffnen des Greifers einen Anstieg der Federkräfte bewirkt und es dadurch zu verschleißerhöhenden Kraftspitzen sowohl im Koppelgetriebe als auch im Kurvengetriebe kommt. Dadurch sind einer funktionsverbessernden Erhöhung der Greifkraft Grenzen gesetzt.A gripping mechanism is known in which the gripper is on a coupling gear is attached. This coupling gear is on arranged a rotating disc and works with one Cam gear together. The movement of the gripper results thereby from the rotation of the disc around a fixed cam. Via two on the input and output link of the coupling gear effective and attached to the rotating disc Tension springs transmit a force to the gripper which Presses sheets of paper against the rotating disc. Inadequate is that opening the gripper causes an increase in spring forces causes and thereby to wear-increasing force peaks comes both in the coupling gear and in the cam gear. Thereby are a function-enhancing increase in gripping force Set limits.

Es ist das Ziel der Erfindung, einen Greifmechanismus mit möglichst hohem Anpreßdruck des Greifers bei gleichzeitigem Abbau von Spannungsspitzen zu entwickeln.It is the aim of the invention to use a gripping mechanism as possible high contact pressure of the gripper with simultaneous dismantling of voltage spikes to develop.

Der Erfindung liegt deshalb die Aufgabe zugrunde, einen Greifmechanismus zu schaffen, der beim Öffnen des Greifers keinen Anstieg der Federkräfte bewirkt.The invention is therefore based on the object of a gripping mechanism to create the no rise when opening the gripper the spring forces.

Erfindungsgemäß geschieht dies dadurch, daß die Anlenkpunkte für die federnden Elemente auf einem beweglich gelagerten Hebel mit Kurvenrolle angeordnet werden und dieser an einer weiteren Kurvenscheibe anliegt, deren größte Exzentrizität "e 2" zur größten Exzentrizität "e 1" der mit dem Koppelgetriebe zusammenarbeitenden Kurvenscheibe versetzt angeordnet ist. Bei Rotation der Drehscheibe wird im Moment des Öffnens des Greifers auch der beweglich gelagerte Hebel mit den daran angelenkten federnden Elementen in der Richtung bewegt, in welcher diese entspannt werden. Dadurch entfallen die verschleißerhöhenden Kraftspitzen sowohl im Koppelgetriebe als auch im Kurvengetriebe. Der Anpreßdruck des Greifers kann funktionsverbessernd erhöht werden. In der Zeichnung ist ein Ausführungsbeispiel des Gegenstandes der Erfindung schematisch dargestellt.According to the invention, this is done in that the articulation points for the resilient elements are arranged on a movably mounted lever with cam roller and this rests on a further cam disc whose greatest eccentricity " e 2 " is offset by the largest eccentricity " e 1 " of the cam disc cooperating with the coupling gear is arranged. When the turntable rotates, at the moment the gripper is opened, the movably mounted lever with the resilient elements articulated thereon is moved in the direction in which they are relaxed. This eliminates the wear-increasing force peaks both in the coupling gear and in the cam gear. The contact pressure of the gripper can be increased to improve its function. In the drawing, an embodiment of the object of the invention is shown schematically.

Auf der Scheibe 1 sind die Hebel 4, 8 mit den Kurvenrollen 5, 9 und der Greifer 7 drehbar gelagert. Der Hebel 4 und der Greifer 7 sind gelenkig durch die Koppel 6 verbunden. Sowohl zwischen den Hebeln 4 und 8 und dem Greifer 7 und dem Hebel 8 sind federnde Elemente gespannt. Die Kurvenscheiben 2 und 3 sind gestellfest gelagert. Bei Rotation der Scheibe 1 öffnet sich der Greifer 7, indem das Koppelgetriebe 1, 4, 6, 7, durch die Kurvenscheibe 2 bewegt wird. Dabei werden die federnden Elemente 10, 11 entlastet, indem der Hebel 8 durch die Kurvenscheibe 3 bewegt wird.The levers 4, 8 with the cam rollers 5, 9 and the gripper 7 are rotatably mounted on the disk 1 . The lever 4 and the gripper 7 are articulated by the coupling 6 . Resilient elements are tensioned both between the levers 4 and 8 and the gripper 7 and the lever 8 . The cams 2 and 3 are fixed to the frame. When the disc 1 rotates, the gripper 7 opens by moving the coupling gear 1, 4, 6, 7 through the cam disc 2 . The resilient elements 10, 11 are relieved by moving the lever 8 through the cam plate 3 .

Claims (1)

Greifmechanismus, bestehend aus einer drehbaren Scheibe mit einer darauf angeordneten Kombination eines Koppelgetriebes mit einem Kurvengetriebe, gekennzeichnet dadurch, daß Anlenkpunkte für federnde Elemente (10, 11) auf einem beweglich gelagerten Hebel (8) mit einer Kurvenrolle (9) angeordnet sind und diese an einer fest im Gestell gelagerten Kurvenscheibe (3) anliegt, deren größte Exzentrizität "e 2" zur größten Exzentrizität "e 1" der mit dem Koppelgetriebe (1, 4, 6, 7) zusammenarbeitenden Kurvenscheibe (2) versetzt angeordnet ist.Gripping mechanism, consisting of a rotatable disc with a combination of a coupling gear with a cam gear arranged thereon, characterized in that articulation points for resilient elements ( 10, 11 ) are arranged on a movably mounted lever ( 8 ) with a cam roller ( 9 ) and on a cam disc ( 3 ) fixedly mounted in the frame rests, the greatest eccentricity " e 2 " of the greatest eccentricity " e 1 " of the cam disc ( 2 ) cooperating with the coupling gear ( 1, 4, 6, 7 ) being offset.
DE19863630875 1985-10-09 1986-09-11 Gripping mechanism Withdrawn DE3630875A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD28154485A DD241580A1 (en) 1985-10-09 1985-10-09 GREIF MECHANISM

Publications (1)

Publication Number Publication Date
DE3630875A1 true DE3630875A1 (en) 1987-04-09

Family

ID=5572011

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19863630875 Withdrawn DE3630875A1 (en) 1985-10-09 1986-09-11 Gripping mechanism

Country Status (2)

Country Link
DD (1) DD241580A1 (en)
DE (1) DE3630875A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0908314A1 (en) * 1997-10-09 1999-04-14 MAN Roland Druckmaschinen AG Control device for the sheet conveying system in a rotary sheet printing press

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10258271A1 (en) 2002-01-11 2003-07-24 Heidelberger Druckmasch Ag Lift off prevention device for preventing control roller from being lifted off a control cam, includes support mechanism that applies additional force upon control roller in critical regions
DE102005009300B4 (en) * 2005-03-01 2013-10-10 Koenig & Bauer Aktiengesellschaft Gripper control gear for controlling gripper movements

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0908314A1 (en) * 1997-10-09 1999-04-14 MAN Roland Druckmaschinen AG Control device for the sheet conveying system in a rotary sheet printing press

Also Published As

Publication number Publication date
DD241580A1 (en) 1986-12-17

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Legal Events

Date Code Title Description
8127 New person/name/address of the applicant

Owner name: BREHMER BUCHBINDEREIMASCHINEN GMBH LEIPZIG, O-7050

8139 Disposal/non-payment of the annual fee