Tokyo Kikai Seisakusho, Ltd.

Makoto Tsunashima

Takashi Iijima

Mitsuo Kitai

Hideo Kawamori

Yoshihiro Iwahashi

Takanobu Sakakura

Yukio Ogawa

Kazuo Serita

A paper jam detection system for a folding machine includes an interval signal generator for generating an interval signal which assumes ON and OFF levels alternately according to cutting intervals of a cutting cylinder; a signature detection mechanism including reflection plates each having a light reflection surface and being arranged circumferentially at an outer circumferential surface portion of a jaw cylinder and a photoelectric sensor adapted to generate a reflection plate detection signal upon detection of the reflection plate; and a control unit for outputting a paper jam signal on the basis of the interval signal and the reflection plate detection signal.

Paper jam detection system for folding machine

In a rotary press intended to perform the synchronous control of driving means with high precision, quickly stabilize rotation, and reduce spoilage caused by phase shifts, comprising a plurality of printing mechanisms in which driving means M rotate N turns while plate cylinders P rotate one turn, so that printing images can be printed on a paper web sequentially passing through each printing mechanism in such a manner that the printing images are matched with a predetermined reference, in which a control section replaces the rotational phase of the plate cylinder with the rotational phase of the driving means M corresponding to that rotational phase so as to match the printing images with a predetermined reference, converts a shift between the rotational phase of the driving means M for matching and the rotational phase of the driving means M in a normal state into the number of outputs of the first pulse signals, set it as a correction value, and obtains a virtual feedback value by shifting the rotational phase of the driving means M by the amount of the correction value, so that control is accomplished by synchronizing the driving reference phase with the virtual feedback phase of the driving means M.

Synchronous control system for rotary presses

In a paper web feed unit of a rotary press, a paper web taken out of a paper roll is longitudinally cut into first and second cut paper webs, which are fed out toward the downstream side by a driven roller of a feed-out mechanism, and only the first cut paper web is passed through an angle bar section for transferring the traveling path of the first cut paper web. The paper web feed unit is equipped with a paper web traveling tension controller which comprises a dancer roller mechanism for independently applying a predetermined pushing pressure to each of the first cut paper web passing through the angle bar section and the second cut paper web not passing through the angle bar section, a detector for detecting the positions of dancer rollers moved in a synchronized manner, and a controller for receiving a detection signal output from the detector and for outputting a control signal to a motor for the driven roller in order to control the rotational frequency of the driven roller to thereby maintain each of the dancer rollers at a constant position.

Paper web feed unit used in a rotary press and equipped with a paper web traveling tension controller

A cylinder throwing-off/throwing-on controller for a multicolor lithographic rotary press in which paper splicing is performed. The cylinder throwing-off/throwing-in controller comprises a pulse generator for outputting a pulse signal every time the paper web travels a predetermined distance; a cylinder throwing-off timing adjustment unit including a counter and a setting device for setting a target count value in advance, the counter starting in response to the paper splicing signal, counting the pulse signal from the pulse generator, and outputting a cylinder throwing-off signal when the counted value reaches the target count value; a cylinder throwing-on timing adjustment unit provided for each of the printing units, the cylinder throwing-on timing adjustment unit starting in response to the cylinder throwing-off signal and outputting a cylinder throwing-on signal after elapse of a preset period of time; and a cylinder throwing-off/throwing-on mechanism for simultaneously moving the blanket cylinders of the plurality of printing units from the printing position to the non-printing position in response to the cylinder throwing-off signal and for sequentially moving the blanket cylinders of the plurality of printing units from the non-printing position to the printing position in response to the cylinder throwing-on signal, from the furthest-upstream printing unit toward the furthest-downstream printing unit.

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Kawasaki, Japan

Makoto Tsunashima