DD206756B1

DD206756B1 - SAFETY DEVICE ON A DEVICE FOR SEPARATING A FINAL TRAIN

Info

Publication number: DD206756B1
Application number: DD23597581A
Authority: DD
Inventors: Juergen Wagner
Original assignee: Rationalisierung D Moebelindus
Priority date: 1981-12-18
Filing date: 1981-12-18
Publication date: 1986-10-22
Also published as: DD206756A1

Description

Anwendungsgebiet der ErfindungField of application of the invention

Die Erfindung betrifft eine Sicherheitsvorrichtung zur Verhinderung von Maschinen- und/oder Werkstückschäden an einer Einrichtung zum Durchtrennen einer Folienbahn, die fortlaufend auf in geringem Abstand voneinander befindliche plattenförmige Werkstücke, z. B. Holzspanplatten ein- oder beidseitig aufgebracht wurde.The invention relates to a safety device for preventing machine and / or workpiece damage to a device for severing a film web, which continuously on at a small distance from each other plate-shaped workpieces, for. B. chipboard one or both sides was applied.

Charakteristik der bekannten technischen LösungenCharacteristic of the known technical solutions

Es ist bekannt, für das Zertrennen einer fortlaufenden Materialbahn, Vorrichtungen zu verwenden, die auf dem Prinzip eines Doppelkurbeltriebes aufgebaut sind. Zu diesem Zweck sind meist zwei gegenüberliegende Doppelkurbeitriebe mit synchron gegensinnig umlaufenden Koppeln, an denen die Schneidmesserbefestigt sind, angeordnet. Die Schneidmesser zertrennen die Materialbahn bei Erfordernis (DE-OS 2823023, DE-AS 1552682). Als Nachteil dieser Vorrichtungen ist anzusehen, daß auf Grund der starren Befestigung der Schneidmesser bei Auftreten von stark erhöhten bzw. unüberwindlichen Schneidwiderständen es zu Schäden an der Vorrichtung und/oder den antreibenden Aggregaten bzw. dem Werkstück kommen kann.It is known to use for the separation of a continuous material web, devices that are based on the principle of a double crank drive. For this purpose, usually two opposite Doppelkurbeitriebe with synchronously opposite directions rotating couplings on which the cutting blades are attached, arranged. The cutting blades sever the material web if required (DE-OS 2823023, DE-AS 1552682). A disadvantage of these devices is to be considered that due to the rigid attachment of the cutting blade on the occurrence of greatly increased or insurmountable cutting resistances may cause damage to the device and / or the driving units or the workpiece.

Ziel der ErfindungObject of the invention

Es ist Ziel der Erfindung, die genannten Nachteile zu vermeiden und Schäden zu verhüten.It is an object of the invention to avoid the disadvantages mentioned and to prevent damage.

Darlegung das Wesens der ErfindungExplanation of the essence of the invention

Der Erfindung liegt die Aufgabe zugrunde, eine Sicherheitsvorrichtung zu entwickeln, die Beschädigungen an der Vorrichtung und/oder den antreibenden Aggregaten bzw. dem Werkstück verhindert, wenn stark erhöhte bzw. unüberwindliche Schneidwiderstände auftreten. Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß die an den Koppeln des Doppelkurbeltriebes angeordneten Messerbalken mit daran befestigten Schneidmessern über Schlitze gegen vorgespannte und über Schrauben verstellbare Federn in Richtung der Schneidbewegung verschiebbar angeordnet sind. Kommt es z. B. infolge von Schaltfehlern dazu, daß die Werkstücklücke nicht in den Schneidbereich der Schneidmesser gelangt, so daß diese auf dem Werkstück aufsitzen, werden die Schneidmesser mit dem Messerbalken gegen die Wirkung der Federn so lange zurückgeschoben, bis die Kurbeln im weiteren Bewegungsablauf wieder in ihre Ausgangstage zurückgehen.The invention has for its object to develop a safety device that prevents damage to the device and / or the driving units or the workpiece when greatly increased or insurmountable cutting resistances occur. According to the invention the object is achieved in that arranged on the coupling of the double crank drive cutter bar with attached cutting blades are slidably disposed via slots against biased and adjustable by screws in the direction of the cutting movement. Does it come z. B. due to switching errors to the fact that the workpiece gap does not get into the cutting area of the cutting blade, so that they sit on the workpiece, the cutting blades are pushed back with the cutter bar against the action of the springs until the cranks in the further movement back into their Return the starting days.

Ausführungsbeispielembodiment

Die Erfindung soll nachstehend an einem Ausführungsbeispiel näher erläutert werden.The invention will be explained in more detail below using an exemplary embodiment.

In den zugehörigen Zeichnungen zeigen:In the accompanying drawings show:

Fig. 1: eine Seitenansicht der Vorrichtung (in Vorschubmitte geschnitten kurz vor Beginn des Trennvorganges);Fig. 1: a side view of the device (cut in feed center just before the start of the separation process);

Fig. 2: eine Vorderansicht der Vorrichtung in Ruhestellung.Fig. 2: a front view of the device in the rest position.

An Trägern 1 beidseits sowie ober- und unterhalb eines Werkstückes 3 mit ein- oder beidseitig aufgebrachter Folienbahn 28 angeordnete Doppelkurbeltriebe 7 weisen an ihren synchron gegensinnig umlaufenden Koppeln 6 Messerbalken 8 mit daran befestigtem Schneidmesser 9 auf. Die Doppelkurbeltriebe 7 ober- und unterhalb des Werkstückes 3 sind dabei in solchem Abstand angeordnet, daß sich die Spitzen der Schneidmesser 9 während des Schneidvorganges um die Überschneidung 13 symmetrisch zum Werkstück 3 überschneiden. Der synchron gegensinnige Umlauf der Koppeln 6 mit daran befestigten Messerbalken 8 und Schneidmesser 9 ist durch beidseits endlose Ketten 16 im Zusammenwirken mit einer gemeinsamen Antriebswelle 20 gesichert. Über die elektromagnetische Kupplung 22 mit eingebauter Bremse können die Doppelkurbeltriebe 7 und somit die Schneidmesser 9 den Schneidvorgang durchführen. Der Messerbalken 8 mit Schneidmesser 9 reicht über die gesamte Werkstückbreite und ist in Schlitzen 10 gegen vorgespannte über Schrauben 11 einstellbare Federn 12 in vertikaler Richtung verschiebbar. Dadurch wird verhindert, daß es zu Zerstörungen oder Beschädigungen an der Vorrichtung und/oder den antreibenden Aggregaten bzw. dem Werkstück 3 kommt, wenn das Schneidmesser 9 auf dem Werkstück 3 aufsitzt, statt in die Werkstücklücke einzutauchen.On carriers 1 on both sides and above and below a workpiece 3 with one or both sides applied film web 28 arranged double crank drives 7 have at their synchronously opposite directions rotating couplings 6 cutter bar 8 with attached cutting blade 9. The double crank drives 7 above and below the workpiece 3 are arranged at such a distance that the tips of the cutting blade 9 overlap symmetrically to the workpiece 3 during the cutting process to the overlap 13. The synchronously opposite rotation of the coupling 6 with attached blade bar 8 and cutting blade 9 is secured by both sides endless chains 16 in cooperation with a common drive shaft 20. About the electromagnetic clutch 22 with built-in brake, the double crank gears 7 and thus the cutting blades 9 perform the cutting process. The cutter bar 8 with cutting blade 9 extends over the entire workpiece width and is slidable in slots 10 against biased screws 11 adjustable springs 12 in the vertical direction. This prevents damage or damage to the device and / or the driving units or the workpiece 3 when the cutting blade 9 rests on the workpiece 3, instead of dipping into the workpiece gap.

Claims

Invention claim:

Safety device on a device for cutting through an endless track, in which are mounted on a double crank drive cutter bar, characterized in that the cutter bar with the cutting blades via slots (10) against biased and screw (11) adjustable springs (12) displaced in the vertical direction are arranged.

For this 1 page drawing

Field of application of the invention

The invention relates to a safety device for preventing machine and / or workpiece damage to a device for severing a film web, which continuously on at a small distance from each other plate-shaped workpieces, for. B. chipboard one or both sides was applied.

Characteristic of the known technical solutions

It is known to use for the separation of a continuous material web, devices that are based on the principle of a double crank drive. For this purpose, usually two opposite double crank drives with synchronously opposite directions rotating couplings on which the cutting blades are mounted, arranged. The cutting blades sever the material web if required (DE-OS 2823023, DE-AS 1552682). A disadvantage of these devices is to be considered that due to the rigid attachment of the cutting blade on the occurrence of greatly increased or insurmountable cutting resistances may cause damage to the device and / or the driving units or the workpiece.

Object of the invention

It is an object of the invention to avoid the disadvantages mentioned and to prevent damage.

Explanation of the essence of the invention

The invention has for its object to develop a safety device that prevents damage to the device and / or the driving units or the workpiece when greatly increased or insurmountable cutting resistances occur. According to the invention the object is achieved in that arranged on the coupling of the double crank drive cutter bar with attached cutting blades are slidably disposed via slots against biased and adjustable by screws in the direction of the cutting movement. Does it come z. B. due to switching failure to the fact that the workpiece gap does not get into the cutting area of the cutting blade, so that they sit on the workpiece, the cutting blades are pushed back with the cutter bar against the action of the springs until the cranks in the further movement back into their Starting position to go back.

embodiment

The invention will be explained in more detail below using an exemplary embodiment. In the accompanying drawings show:

Fig. 1: a side view of the device (cut in feed center just before the start of the separation process); FIG.

2: a front view of the device in the rest position.

On carriers 1 on both sides and above and below a workpiece 3 with one or both sides applied film web 28 arranged double crank drives 7 have at their synchronously opposite directions rotating couplings 6 cutter bar 8 with attached cutting blade 9. The double crank drives 7 above and below the workpiece 3 are arranged at such a distance that the tips of the cutting blade 9 overlap symmetrically to the workpiece 3 during the cutting process to the overlap 13. The synchronously opposite rotation of the coupling β with attached blade bar 8 and cutting blade 9 is secured by both sides endless chains 16 in cooperation with a common drive shaft 20. About the electromagnetic clutch 22 with built-in brake, the double crank gears 7 and thus the cutting blades 9 perform the cutting process. The cutter bar 8 with cutting blade 9 extends over the entire workpiece width and is slidable in slots 10 against biased screws 11 adjustable springs 12 in the vertical direction. This prevents damage or damage to the device and / or the driving units or the workpiece 3 when the cutting blade 9 rests on the workpiece 3, instead of dipping into the workpiece gap.