Printed unit block arrangement device and arrangement method

1. A printed unit block aligning device that cuts a large sheet with multiple prints having an imposition structure in vertical lines and horizontal lines into printed unit blocks, aligns the printed unit blocks, and transfers the printed unit blocks at a speed constant for any imposition structure to a subsequent step, the device comprising:

primary cutting means that cuts a large sheet block including a stack of the large sheets into line unit blocks arranged side by side;

secondary cutting means that cuts the line unit block formed by the cutting by the primary cutting means into printed unit blocks;

an upper rail that is opened and closed between a supporting position and a releasing position, the supporting position being a position where the printed unit blocks are charged in each line unit block by vertical feeding and transferring means that feeds a group of the printed unit blocks vertically;

a lower rail group arranged directly below the upper rail to be perpendicular to the upper rail, the lower rail group receiving each of the printed unit blocks in a group in each line unit block dropped in response to move of the upper rail to the releasing position and feeding the group of the printed unit blocks using horizontal feeding and transferring means;

supporting means that is opened and closed between a supporting position and a releasing position, the supporting position being a position where the group of the printed unit blocks in each line unit block fed horizontally and transferred from the lower rail group is received; and

an alignment transfer rail that receives the group of the printed unit blocks dropped in response to move of the supporting means to the releasing position, aligns the group of the printed unit blocks in each line unit block in a vertical direction, and feeds the group of the printed unit blocks vertically at a constant speed using alignment transferring means, wherein

electrical controlling means is provided that electrically controls timing of dropping the printed unit blocks from the supporting means onto the alignment transfer rail,

while the horizontal feeding and transferring means transfers the group of the printed unit blocks at a uniform speed for any imposition structure, the electrical controlling means controls timing of dropping the printed unit blocks in a manner that depends on a number of layers of the printed unit blocks in each vertical line in different imposition structures, and

the electrical controlling means controls a clutch brake provided to the horizontal feeding and transferring means to halt the horizontal feeding temporarily to control timing of dropping the printed unit blocks, thereby placing the horizontal feeding and transferring means on standby until vacancy for subsequent group of the printed unit blocks opens up on the alignment transfer rail.

2. The printed unit block aligning device according to claim 1 , wherein the speed of transfer of the horizontal feeding and transferring means is a speed unified under a condition of a minimum number of layers in each vertical line of an imposition structure.

3. The printed unit block aligning device according to claim 1 , wherein the supporting means in the supporting position supports the printed unit blocks at opposite lateral sides of the printed unit block and the supporting means in the releasing position releases the opposite lateral sides from support by the supporting means simultaneously to drop the printed unit blocks onto the alignment transfer rail.