Variable cutoff folding device and printer comprising variable cutoff folding device

Abstract

This variable cutoff folding device 100 comprises: a cutting mechanism 10 capable of changing a cutting length; a speed-increasing conveyor mechanism 20 capable of changing a conveying speed based on a change in the cutting length; a folding cylinder 40 having a pin device 41 and a thrust blade device 43, the thrust blade device 43 being configured to be displaced based on the change in the cutting length; and a jaw cylinder 50 configured to be rotationally displaced based on displacement of the thrust blade device 43.

What is claimed is: 
     
         1 . A variable cutoff folding device, comprising:
 a cutting mechanism capable of cutting a continuous paper into individual sheets, and capable of changing a cutting length;   a speed-increasing conveyor mechanism capable of conveying the individual sheets at an increased speed over a supply speed of the continuous paper, and capable of changing a conveying speed based on a change in the cutting length;   a folding cylinder having installed on an outer circumferential surface thereof a pin device and a thrust blade device, the pin device being configured to stick a pin into a leading edge in a running direction of the individual sheets, and the thrust blade device being configured to thrust a thrust blade against the individual sheets stuck by the pin in said pin device and to be displaced based on the change in the cutting length; and   a jaw cylinder having installed on an outer circumferential surface thereof a jaw device for gripping the thrust blade and being configured to be rotationally displaced based on displacement of the thrust blade device.   
     
     
         2 . The variable cutoff folding device according to  claim 1 , wherein
 the speed-increasing conveyor mechanism includes:   a belt conveyor including a suction hole; and a suction device for suctioning the individual sheets via the suction hole.   
     
     
         3 . The variable cutoff folding device according to  claim 1 , further comprising:
 a downward-of-folding conveyor mechanism provided on a downstream side of the speed-increasing conveyor mechanism and an upstream side of the folding cylinder, the downward-of-folding conveyor mechanism being configured to synchronize with a circumferential speed of the folding cylinder and convey the individual sheets with the same speed as the circumferential speed of the folding cylinder.   
     
     
         4 . The variable cutoff folding device according to  claim 1 , wherein
 a stopper is installed in the folding cylinder to form a pair with the pin device, the stopper being configured to be butted against by the individual sheets on a downstream side of a position where the pin of the pin device protrudes.   
     
     
         5 . The variable cutoff folding device according to  claim 1 , wherein
 the cutting mechanism is a cutter cylinder having a cutter installed protruding from an outer circumference of the cutter cylinder, and   when the cutting length is maximum, a circumferential speed of the cutter cylinder, the folding cylinder, and the jaw cylinder are the same speed as the supply speed of the continuous paper.   
     
     
         6 . A printer comprising the variable cutoff folding device recited in  claim 1 .