JPH11105454A - Sizing length deciding apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent production of a defective book such as contaminant of a cover due to bulged size caused by inaccurate sizing position of a pull-out folder, or deterioration of a commodity value as a book due to formation of a space between the cover and the folder in a method for detecting the folder. SOLUTION: The sizing length deciding apparatus comprises a reference point decided at each one cycle of the apparatus, an encoder 3 of a rotary shaft 4, a setter 1, a controller 2, and size supplying valve, solenoids 5, 6. In this case, size is supplied or stopped at decided one point of the apparatus as a reference. Thus, contamination of a cover or production of a defective book due to bulged size can be eliminated. And, space between the cover and a pull-out folder is eliminated, and a commodity value of a book can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glue length sizing device for a bookbinding machine.

[0002]

2. Description of the Related Art In a conventional method for detecting a folded book using a photoelectric sensor, an error of several m / m cannot be avoided even if the leading end of the folded book is detected because the detection accuracy is not constant.

In addition, instability has been unavoidable, such as dust adhering to the sensor unit and causing malfunction.

[0004]

If the gluing position is incorrect on the folded book, the glue will protrude from the edge of the cover when the folded book and the cover are pasted, thereby forming the spine of the book. The glue adheres to the mechanical part and arrives at the next cover, and the cover is stained, resulting in defective books. If the glue position is not constant, the glue will not be attached to the spine edge of the book when the book is glued to the cover and then cut off by a cutting machine. A space is created between the cover and the folded book, which degrades the commercial value of the book.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and its gist is that one reference point defined for each machine cycle is provided. , An encoder attached to the rotating shaft of the machine, a setter for inputting the count number from the reference point to the glue supply start point and a glue supply count number, and a set number from the setter and a pulse from the encoder. A glue length comprising a control unit for calculating and controlling the output, a valve and a solenoid for controlling the glue supply, and supplying and stopping the glue using a predetermined point of the machine as a reference point. It is a sizing device.

Next, the present invention will be described in detail with reference to the drawings and the like for the embodiments. First, P is one reference point defined for each cycle of the machine. 1 is a setting device for inputting the count number from the reference point P to the glue supply start point and the glue supply count number, and 2 is for calculating the set number from the set device 1 and the palace from the encoder 3. And a control unit for controlling the output. Reference numeral 3 denotes an encoder mounted on the rotating shaft 4 of the machine. Reference numerals 5 and 6 denote valves and solenoids for controlling the glue supply. Therefore, according to the present invention, one point determined for each cycle of the machine is set as a reference point P, and a pulse from the encoder 3 attached to the rotating shaft 4 of the machine starts counting from the reference point P. A valve for supplying glue to a gluing roller of a bookbinding machine, which starts glue supply and supplies glue for a separately set count number. A valve for operating a solenoid 5 or a glue supply scraper. This is a glue length sizing device configured to operate a solenoid 6 and the like. In other words, in short, the present invention is a glue length sizing device characterized in that glue is supplied and stopped based on one determined point of the bookbinding machine.

[0007]

According to the present invention, unlike the folding book detection method using the conventional photoelectric sensor, in the present invention, the gluing position of the folding book becomes inaccurate, thereby causing the cover to be stained due to the sticking out of the glue and the generation of defective books. Can be eliminated. Also, if the gluing position is not constant, the glue is not attached to the back edge of the book when the book is cut off the end of the folded book after being pasted on the cover and cut into a book. Although a space is created between the cover and the folded book, such a space cannot be formed in the present invention, and the commercial value of the book can be significantly improved, and a contribution to the world through efficient mass production of excellent books. Is big. The reference point of the machine of the present invention includes a method using an origin signal from an encoder and a method using a separate origin sensor.

[Brief description of the drawings]

FIG. 1 is a block diagram of the device of the present invention.

[Explanation of symbols]

 P Reference point 1 Setter 2 Control unit 3 Encoder 4 Rotary axis 5 Valve. Solenoid 6 valve. solenoid

Claims (3)

[Claims] 1. A reference point defined for each cycle of a machine, an encoder attached to a rotating shaft of the machine, a count number from the reference point to a glue supply start point, and a glue supply count number are input. For controlling the output by calculating the number of settings from the setter and the pulses from the encoder, and a valve for controlling the glue supply. A glue length sizing device, comprising a solenoid or the like, for supplying and stopping glue using a predetermined point of the machine as a reference point. 2. The glue length sizing device according to claim 1, wherein the reference point of the machine is a method based on an origin signal from an encoder. 3. The glue length sizing device according to claim 1, wherein the reference point of the machine is a method using a separate origin sensor.