Swing mechanism for sheet-fed printing presses

The swing device in sheet-fed printing presses uses staged movement of a regulating unit with separate drive units to prevent counterfeit paper gripping and reduce noise and damage by limiting claw movement, addressing the issues of inconsistent solenoid operation and corner collisions.

JP7884406B2Active Publication Date: 2026-07-03RYOBI MHI GRAPHIC TECH LTD
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Patent Information

Application Number
JP2022139155
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-09-01
Publication Date
2026-07-03
Estimated Expiration
2042-09-01

AI Technical Summary

Technical Problem

Existing swing devices in sheet-fed printing presses risk damage from collisions between the stop claw's notch and cam lever corners due to inconsistent solenoid operation speeds, especially at lower speeds, and fail to reliably prevent the gripping of counterfeit papers without causing noise or damage.

Method used

A swing device with a regulating unit that includes a first and second contact portion to restrict claw movement in stages, driven by separate drive units, preventing the claws from gripping papers by limiting movement to increasingly open positions when fraudulent sheets are detected, thereby reducing collisions and noise.

Benefits of technology

The solution effectively prevents the gripping of counterfeit papers and minimizes damage and noise by staged movement of the regulating unit, ensuring reliable operation without corner collisions.

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Abstract

To reliably suppress gripping an improper sheet without causing damage.SOLUTION: A swing device of a sheet-fed printer comprises: a swing part which moves between a position for receiving a sheet from a paper feeding part and a position for delivering it to a printing part and includes a claw 4 for gripping the sheet at the receiving position and opening the gripping at the delivering position; a claw opening / closing mechanism 5 which opens / closes the claw into a gripping attitude and an opening attitude and has a stopper 51 capable of regulating so that the claw does not grip the sheet at the receiving position; a regulation part provided with a first contact part 61 which comes into contact with the stopper 51 so that the claw 4 at the receiving position becomes a first opening attitude more opened than the gripping attitude and a second contact part 62 which comes into contact with the stopper 51 so that the claw 4 at the receiving position becomes a second opening attitude more opened than the first opening attitude; a first mechanism part 7 which moves the regulation part 6 so that the first contact part 61 is positioned at a first position in contact with the stopper 51 by a detection signal having detected an improper sheet; and a second mechanism part 8 which moves the regulation part 6 from the first position so as to be positioned at a second position.SELECTED DRAWING: Figure 3
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Citation Information

Patent Citations

  • JP1987020285U