Safety device in a platen press that processes plate-like...

B - Operations – Transporting – 30 – B

Patent

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Details

B30B 15/00 (2006.01) B26D 7/24 (2006.01) B30B 15/28 (2006.01) F16P 3/00 (2006.01) F16P 3/14 (2006.01)

Patent

CA 2149975

The invention refers to a safety device which prevents a gripper bar from being squeezed in a platen press (5) that processes plate-like workpieces. This press comprises a fixed upper beam (12) and a movable lower beam (10) cyclically raised by a driving device (15-20). The safety device comprises a detector (30) for emergency situations in the form of a cell (30) for direct scanning of the passage of the gripper bar, which cell is arranged at the level of the outlet of the press (5). This cell tilts a switch (34) in an emergency braking device (36) arranged in the drive (20) of the lower beam. Preferably, the scanning cell (30) is an inductive captor detecting the proximity of the metal mass.

La présente invention a pour objet un dispositif de sécurité qui sert à empêcher la barre de préhension d'être coincée entre les platines d'une presse à platines (5) utilisée pour imprimer des articles en forme de feuille. La presse en question comporte un longeron supérieur fixe (12) et un longeron inférieur mobile (10) qui est relevé cycliquement par un mécanisme d'entraînement (15 - 20). Le dispositif de sécurité comporte un détecteur (30) de situations d'urgence sous forme d'une cellule détectrice (30) qui est disposée au niveau de la sortie (5) de la presse pour surveiller les passages de la barre de préhension par balayage direct. La cellule en question actionne l'interrupteur à bascule (34) d'un dispositif de freinage d'urgence (36) intégré au mécanisme d'entraînement (20) du longeron inférieur. De préférence, la cellule détectrice (30) est un capteur inductif capable de détecter la proximité de la masse métallique.

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