A method and an apparatus for turning boards

B - Operations – Transporting – 27 – B

Patent

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Details

B27B 31/04 (2006.01) B65G 47/248 (2006.01) B65G 47/252 (2006.01)

Patent

CA 2247136

A method of turning boards (2) comprises the steps that the boards (2) are transported on a conveyor (1) with conveyor dogs (4), with their longitudinal direction transverse to the conveyor (1). The boards (2) are accelerated relative to the conveyor (1) until the front edges (13) of the boards (2) abut against the rear edge (14) of the next dog (4). Lifting devices (16) which move synchronously with the conveyor (1) lift the front edges of the boards (2) at the same time as the boards (2) are moved towards the lifting devices (16), whereby the boards (2) are turned with their front edges facing upwards and backwards. An apparatus for turning boards comprises a first conveyor (1) with dogs (4) for transport of the boards (2), and a second conveyor (11) with an upper part (12) which, on the first conveyor (1), shunts the boards from one dog (4) to the next. The lifting devices (16) are disposed to move synchronously with the first conveyor (1) and gradually to be raised immediately behind the dogs (4) of the first conveyor.

Procédé de retournement de planches (2) prévoyant des étapes consistant à transporter les planches (2) sur un convoyeur (1) comportant des butées (4), ces planches étant posées à la perpendiculaire du sens de déplacement du convoyeur (1). Les planches (2) subissent une accélération par rapport au convoyeur (1) jusqu'à ce que leur bords antérieurs (13) butent contre le bord postérieur (14) de la butée suivante (4). Un dispositif de levage (16) qui se déplace de manière synchrone par rapport au convoyeur (1) soulève le bord antérieur de la planche (2) en même temps que celle-ci se déplace en direction de ce dispositif de levage (16) de sorte qu'elle est retournée dans un mouvement selon lequel son bord antérieur se déplace vers le haut puis vers l'arrière. Le dispositif de retournement des planches comprend un premier convoyeur (1) pourvu de butées (4) assurant le transport des planches (2) et un deuxième convoyeur (11) dont la partie supérieure (12) déplace, sur le premier convoyeur (1), des planches d'une butée (4) à la suivante. Le dispositif de levage (16) est disposé de manière à se déplacer en même temps que le premier convoyeur et à s'élever progressivement immédiatement en arrière des butées (4) de ce convoyeur.

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