JPS6023153U

JPS6023153U - Side needle defect detection device for sheet-fed printing presses

Info

Publication number: JPS6023153U
Application number: JP11567983U
Authority: JP
Inventors: 健治増田; 小笠原　和一
Original assignee: 凸版印刷株式会社; 日本デジタル制御株式会社
Priority date: 1983-07-26
Filing date: 1983-07-26
Publication date: 1985-02-16

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図はカラー印刷機の概略的構成説明図、第２図は印
刷用紙の位置決め状態を示す平面図、第３図は横針装置
による針引動作状態及び針引不良検出状態を示す側面図
、第４図は横針装置近傍を示す概略的斜視図、第５図は
この考案の一実施例の構成を示す説明図である。１１・・・投光装置、１２・・・受光装置、２２・・・
薄紙用基準信号発生回路、２３・・・厚紙用基準信号発
生回路、２４・・・切換−スイッチ、２５・・・比較回
路、２６・・・タイミング回路、３０・・・ブザー。Fig. 1 is a schematic configuration explanatory diagram of a color printing press, Fig. 2 is a plan view showing the positioning state of printing paper, and Fig. 3 is a side view showing the state of needle pulling operation by the horizontal needle device and the state of detecting defective needle drawing. 4 is a schematic perspective view showing the vicinity of the horizontal needle device, and FIG. 5 is an explanatory view showing the configuration of an embodiment of this invention. 11... Light projecting device, 12... Light receiving device, 22...
Reference signal generation circuit for thin paper, 23... Reference signal generation circuit for thick paper, 24... Changeover switch, 25... Comparison circuit, 26... Timing circuit, 30... Buzzer.

Claims

[Scope of utility model registration request]

a light projecting device located at the side edge of the feeder board of the sheet-fed printing press and irradiating the area where the side edge of the printing paper pulled by the horizontal needle device will be located; a light receiving device that outputs an electrical signal according to the amount of received light; a plurality of reference signal generation circuits that generate reference signals of different levels; a changeover switch that selects which of the reference signals to use; a comparison circuit that compares a measurement signal corresponding to the amount of received light with the selected reference signal and determines whether or not the printing paper is present at a predetermined position in the width direction;
a timing circuit that uses the output of the comparator circuit to detect defects in horizontal stitching only at the moment when the printing paper is pulled by the horizontal stitching device;
Is it connected to the timing circuit to issue an alarm when the printing paper is not in the specified position? A side needle defect detection device for a sheet-fed printing press, comprising a r-reporting device.