Device for applying line for folding process on front cover before attachment to main body

Abstract

A front cover (S) is transferred between first and second feed roller pairs (2, 3; 4, 5), which synchronously rotate in the same direction; first and second line forming units (13, 14) each consisting of a stationary die (15) and a movable die (16) are arranged between the first and second feed roller pairs; and the stationary die and the movable die are opposed with a transfer path (F) of the front cover therebetween. Further, a sensor (29) for detecting a front end edge of the front cover is arranged between the first feed roller pair (2, 3) and the first line forming unit (13), so that, while rotational amounts of the first and second feed roller pairs are controlled, each time that the front cover is transferred a predetermined length from the sensor, the rotation of the first and second feed roller pairs is stopped and the line forming units are operated to form a line on the front cover by pressing the movable die onto the stationary die.

Description

technical field [0001] The present invention relates to perfect binding in which a cover having a front cover forming area and a back cover forming area on both sides of the back forming area is interposed, the back forming area is attached to the back of the main body, and then the cover is bent. , A device that adds lines for bending to the cover before pasting the back of the main body. Background technique [0002] Conventional perfect binding machines are provided with, for example: a series of processing units (milling unit, sizing unit, and packaging unit) that are disposed along the main body conveying path for perfect binding processing; clamping units that can reciprocate along the main conveying path; Clamping unit drive mechanism for reciprocating movement of the clamping unit. Furthermore, the clamping unit has a pair of clamping plates, the main body is clamped by the pair of clamping plates, and the perfect binding process is performed while passing through a...

AI Technical Summary

Problems solved by technology

[0015] According to this conventional grain line adding unit, when mass-producing books of the same thickness, there is no need to change the interval between the first and second grain line adding roller pairs set once, so the production efficiency is high, but it is necessary to produce books with a small amount of thickness. In the case of different kinds of books, whenever the thickness of the book is changed, it is necessary to move the first grain entry roller pair to change the interval between the first and second grain entry roller pairs, and this changing operation takes labor and time. , and during this operation, the binding action of the binding machine has to be interrupted, as a result, there is a problem that the production efficiency becomes very poor

[0016] In addition, according to the ridge line adding unit, when changing the thickness of the cover, it is necessary to change the distance between the driving shaft and the driven shaft, but when a mechanism for changing the distance between the shafts is provided, the structure of the binding machine is more complicated, and , there is a problem that the production efficiency is further reduced due to the change of the distance between the shafts

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