Method for centering veneer sheets in a pile

Abstract

A method for centering the settling of veneers on top of each other in a veneer pile, the veneers being cut from a log by slicing and dried. A substantially horizontal pile is, freely supported and having in the lateral direction extreme limits with clearance, subjected to a horizontal swinging motion whereby the extreme limits are reduced during the swinging motion.

1 . A method for centering the settling of veneer sheets on top of each other forming a pile after drying and being separated from a log by slicing, characterized in that a substantially horizontal pile, freely supported and having extreme limits with clearance in the lateral direction, is subjected to a horizontal swinging motion, and that during the swinging motion the extreme limits are reduced. 
     
     
         2 . A method according to  claim 1 , characterized in that the veneer pile is subjected to the swinging motion as an eccentric rotating motion having an amplitude exceeding the clearance of the lateral extreme limits. 
     
     
         3 . A method according to  claim 1 , characterized in that the veneer pile is subjected to the swinging motion as a reciprocating motion in the reduction direction of the extreme limits, having an amplitude exceeding the clearance of the lateral extreme limits. 
     
     
         4 . A method according to  claim 1 , characterized in that the swinging motion is used with an amplitude of ca. 50 mm. 
     
     
         5 . A method according to  claim 1 , characterized in that the swinging motion is used with a frequency of ca. 2 Hz. 
     
     
         6 . A method according to  claim 1 , characterized in that the veneer pile is supported slightly inclined in the grain direction of the veneers. 
     
     
         7 . An apparatus for implementing the method according to  claim 1 , characterized in that the apparatus comprises at least two gripping arm pairs ( 7 ,  7 ′) setting on the opposite sides of the veneer pile, that the apparatus comprises actuators ( 3 ) for controllably moving the gripping arms to directly support the veneer pile, that the apparatus comprises actuating elements ( 6 ,  6 ′) for moving the gripping arms at the opposite sides of the veneer pile towards each other, respectively apart from each other, and that the apparatus comprises actuating elements ( 5 ) for causing a reciprocating shaking motion of the gripping arms. 
     
     
         8 . An apparatus according to  claim 7 , characterized in that the supporting planes of the gripping arms ( 7 ,  7 ′) are on different heights at the opposite ends of the veneer pile ( 1 ). 
     
     
         9 . A method according to  claim 2 , characterized in that the swinging motion is used with an amplitude of ca. 50 mm. 
     
     
         10 . A method according to  claim 3 , characterized in that the swinging motion is used with an amplitude of ca. 50 mm. 
     
     
         11 . A method according to  claim 2 , characterized in that the swinging motion is used with a frequency of ca. 2 Hz. 
     
     
         12 . A method according to  claim 3 , characterized in that the swinging motion is used with a frequency of ca. 2 Hz. 
     
     
         13 . A method according to  claim 4 , characterized in that the swinging motion is used with a frequency of ca. 2 Hz. 
     
     
         14 . A method according to  claim 2 , characterized in that the veneer pile is supported slightly inclined in the grain direction of the veneers. 
     
     
         15 . A method according to  claim 3 , characterized in that the veneer pile is supported slightly inclined in the grain direction of the veneers. 
     
     
         16 . A method according to  claim 4 , characterized in that the veneer pile is supported slightly inclined in the grain direction of the veneers. 
     
     
         17 . A method according to  claim 5 , characterized in that the veneer pile is supported slightly inclined in the grain direction of the veneers. 
     
     
         18 . A method according to  claim 9 , characterized in that the veneer pile is supported slightly inclined in the grain direction of the veneers. 
     
     
         19 . A method according to  claim 10 , characterized in that the veneer pile is supported slightly inclined in the grain direction of the veneers. 
     
     
         20 . A method according to  claim 11 , characterized in that the veneer pile is supported slightly inclined in the grain direction of the veneers.