Paper sheet material receiving and stacking system

Abstract

A paper sheet material receiving and stacking system includes a conveying unit including a feed table for receiving pieces of paper sheet material cut out of a continuous web, a receiving and adjustment unit including a carrier frame pivotally connected to the conveyor unit for transferring the received pieces of paper sheet material and a driving device for biasing the carrier frame between a horizontal position and an inclined position and an adjustment mechanism for controlling the gap of a sheet-transfer passage, and a stacking unit including a platform adapted for receiving pieces of paper sheet material passing through the sheet-transfer passage and a transmission mechanism controllable to move the platform horizontally forward, backward, leftward and rightward and vertically up and down and a sliding limiter for stopping pieces of paper sheet material on the platform in a stack.

What the invention claimed is: 
     
         1 . A paper sheet material receiving and stacking system, comprising:
 a conveying unit, said conveying unit comprising a feed table for receiving pieces of paper sheet material cut out of a continuous web, a conveyor frame extended from one end of said feed table and an endless conveying belt mounted on said conveyer frame and adapted for delivering the pieces of paper sheet material received by said feed table to a receiving and adjustment unit;   a receiving and adjustment unit, said receiving and adjustment unit comprising a carrier frame pivotally connected to one end of said conveyor frame opposite to said feed table and adapted for transferring the received pieces of paper sheet material from the endless conveying belt of said conveying unit to a stacking unit, a driving device coupled to an opposite end of said carrier frame and controllable to move said carrier frame between a horizontal position and an inclined position, an adjustment mechanism at said carrier frame and adapted for controlling said conveyor frame to transfer the received pieces of paper sheet material to a stacking unit piece by piece; and   a stacking unit adapted for receiving pieces of paper sheet material from said receiving and adjustment unit and stacking up the received pieces of paper sheet material in a stack, said stacking unit comprising a platform adapted for receiving pieces of paper sheet material from said receiving and adjustment unit, a transmission mechanism controllable to move said platform horizontally forward, backward, leftward and rightward and vertically up and down, a stacking space defined above said platform and a sliding limiter suspending in said stacking space and adapted for stopping pieces of paper sheet material in said stacking space in a stack.   
     
     
         2 . The paper sheet material receiving and stacking system as claimed in  claim 1 , wherein the pieces of paper sheet material receivable by said feed table are corrugated sheets or cardboard sheets. 
     
     
         3 . The paper sheet material receiving and stacking system as claimed in  claim 1 , wherein said conveyor frame extends obliquely upwardly from said feed table; said conveying unit further comprises a motor drive mounted at said conveyor frame and controllable to rotate the endless conveying belt of said conveying unit on said conveyor frame at different speeds. 
     
     
         4 . The paper sheet material receiving and stacking system as claimed in  claim 1 , wherein said receiving and adjustment unit comprises at least one transmission roller pivotally mounted at one end of said carrier frame adjacent to the conveyor frame of said conveying unit, at least one steering roller pivotally mounted at an opposite end of said carrier frame, an endless conveying belt mounted on said at least one transmission roller and said at least one steering roller, a motor drive mounted in a bottom side of said carrier frame and controllable to rotate said at least one transmission roller in moving the endless conveying belt of said receiving and adjustment unit; said driving device is selected from the group of hydraulic cylinder, pneumatic cylinder, transmission gear set, transmission chain and motor set. 
     
     
         5 . The paper sheet material receiving and stacking system as claimed in  claim 1 , wherein said adjustment mechanism comprises a bracket fixedly mounted at said carrier frame, a substantially L-shaped link pivotally mounted at said bracket, a push and pull member coupled between said carrier frame and one end of said L-shaped link and adapted for biasing said L-shaped link, an impression wheel pivotally mounted at an angled corner area of said L-shaped link and defining with the endless conveying belt of said receiving and adjustment unit a sheet-transfer passage through which pieces of paper sheet material are delivered individually. 
     
     
         6 . The paper sheet material receiving and stacking system as claimed in  claim 5 , wherein said push and pull member of said receiving and adjustment mechanism is selected from the group of hydraulic cylinder, pneumatic cylinder, transmission gear set, transmission chain and motor set. 
     
     
         7 . The paper sheet material receiving and stacking system as claimed in  claim 1 , wherein said transmission mechanism of said stacking unit comprises at least one of the sets of hydraulic cylinders, pneumatic cylinders, transmission gear sets, transmission chains and motor sets. 
     
     
         8 . The paper sheet material receiving and stacking system as claimed in  claim 1 , wherein said stacking unit further comprises a sliding track suspending above said stacking space; said sliding limiter is slidably mounted at said sliding track and holding a stop member in said stacking space for stopping pieces of paper sheet material at said platform in a stack.