Log ejection group and relative ejection method

Abstract

Described is a log ejection group in a rewinding machine that includes an unloading plane of wound logs and a means for slowing down the logs associated with the unloading plane. The slowing down means includes a motorized upper inlet roller to intercept the logs arriving on the unloading plane and a pair of motorized handling rollers located downstream of the upper inlet roller. The pair includes an upper handling roller and a lower handling roller. The lower handling roller is integrated into the unloading plane. The upper inlet roller and the upper handling roller are arranged on an upper structure, which is adjustable in height. The angular speed of the upper inlet roller is greater than the angular speed of the upper handling roller. A method for ejecting a log using the log ejection group is also described.

1 . A log ejection group in a rewinding machine comprising
 an unloading plane of wound logs and   a unit for slowing down the logs associated with the unloading plane, said unit comprising a motorized upper inlet roller to intercept the logs arriving on the unloading plane and a pair of motorized handling rollers located downstream of the upper inlet roller,   wherein   the pair of handling rollers includes an upper handling roller and a lower handling roller,   the lower handling roller is integrated into the unloading plane, and   the upper inlet roller and the upper handling roller are arranged on an upper structure that is adjustable in height, an angular speed of the upper inlet roller being greater than an angular speed of the upper handling roller.   
     
     
         2 . The log group according to  claim 1 , wherein the angular speed of the upper handling roller is greater than an angular speed of the lower handling roller. 
     
     
         3 . The log ejection group according to  claim 1 , wherein the upper inlet roller cooperates with the unloading plane to intercept the logs arriving on the unloading plane. 
     
     
         4 . The log ejection group according to  claim 1 , wherein
 the unit further comprises a lower inlet roller placed upstream of the pair of handling rollers and integrated in the unloading plane forming with the upper inlet roller a pair of inlet rollers, and   the angular speed of the upper inlet roller is higher than an angular speed of the lower inlet roller.   
     
     
         5 . The log ejection group according to  claim 4 , wherein the lower inlet roller is idle or frictioned. 
     
     
         6 . The log ejection group according to  claim 4 , wherein the lower inlet roller is motorized and forms with the upper inlet roller a pair of motorized inlet rollers. 
     
     
         7 . The log ejection group according to  claim 6 , wherein the unit comprises only two pairs of motorized rollers, which are the pair of motorized inlet rollers and the pair of motorized handling rollers. 
     
     
         8 . The log ejection group according to  claim 1 , further comprising a single upper motor and a single lower motor. 
     
     
         9 . The log ejection group according to  claim 4 , wherein the lower inlet roller and the lower handling have a fixed position under the unloading plane and are placed with their upper generatrix tangential to the first inclined portions of the unloading plane. 
     
     
         10 . A method for ejecting a log, the method comprising:
 receiving a log rolling on an unloading plane towards a motorized upper inlet roller,   transferring the log downstream of the upper inlet roller,   receiving the log between an upper handling roller and a lower handling roller of a pair of motorized handling rollers, in which the upper handling roller has an angular speed lower than the upper inlet roller, and   transferring the log rolling on the unloading plane towards an exit.   
     
     
         11 . The method according to  claim 10 , wherein, in the pair of motorized handling rollers, the angular speed of the upper handling roller is greater than an angular speed of the lower handling roller. 
     
     
         12 . The method according to  claim 10 , wherein the log is received at an inlet on the unloading plane by a pair of inlet rollers formed by the upper inlet roller and a lower inlet roller, and the upper inlet roller has a greater angular speed than the lower inlet roller.