JPS6052344A - Controller for cleaning cylinder of rotary press - Google Patents

Abstract

PURPOSE:To facilitate the cleaning work by automatically and intermittently rotate a rotary cylinder by the operation of a start switch. CONSTITUTION:When a cleaning switch Sc and a start switch Ss are turned ON according to the start of the cleaning work, a power source E1 is supplied to each circuit following a relay RY1 with a contact RYS3. A timer TM2 operates an electromagnetic switch MS only during the set time to rotate a main motor M of a printing press. As the timer TM2 is up in the time, a timer TM3 starts and with the time up of the timer TM3, the timer TM2 is started again through the timer TM1. Therefore, the stoppage time is determined by the set time of the timer TM3, while based on the stoppage time and the timer TM2, an AC power source 3phiAC is intermittently applied to a motor M according to the rotation time.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention provides a method for automatically and intermittently rotating these rotary cylinders when cleaning rotary cylinders such as impression cylinders in a rotary printing press.
The present invention relates to a control device that facilitates cleaning work.

[Prior art]

Rotary printing presses are equipped with rotating cylinders such as a printing cylinder, a blanket cylinder, an impression cylinder, etc., and it is necessary to clean stains caused by paper, ink, etc. In contrast, the impression cylinder is equipped with claws that allow for continuous cleaning.
Since there is a risk of getting the worker's hands involved, the machine is rotated intermittently to perform partial cleaning.

For this reason, the printing press is equipped with a push-button switch near the rotary cylinder and is manually operated to perform cleaning operations while driving or reversely driving the rotary cylinder.

However, the operation of the pushbutton switch and the cleaning operation must be repeated alternately, which results in a troublesome operation and a reduction in work efficiency.

[Summary of the invention]

The present invention aims to fundamentally eliminate the drawbacks of the conventional printers, and provides extremely effective screen cleaning for a single rotary printing press in which a 91-turn cylinder is intermittently rotated only by operating a start switch. The present invention provides a control device for

〔Example〕

Hereinafter, the present invention will be described in detail with reference to circuit diagrams showing embodiments.

The figure shows a control circuit. When cleaning switch Bc is turned on in response to the start of cleaning work, power supply El + E is applied to relay RYC, which operates and contacts RYC, , R
When YC is on, the indicator light PL lights up through the contact RYCI, and the contact RYC is switched on and off when the cover of the rotary cylinder is opened.For safety reasons, the printing press cannot be operated. After cutting off the operation control signal CS given via the cover switch Ss to forcefully stop the operation, the contact RY is
It is assumed that the stain magnetic switch MS is controlled by Qg, and the preparation state is set.

Therefore, cover switch SS is disabled.

When the cover of the rotating body is opened and the start switch S8 is turned on, the relay RY8 operates via the on contact RYC1, and the contact RYS is self-holding, and the timer TMD and The relay RYD is operated, and the contact RYS supplies power E1 to each circuit after the relay RYI.

The timer TMD is used to cause the relay RYD to perform a differential operation.When the time is up after a short time, the timer TMD turns off the contact TMD1 and maintains this state until the power is removed. is restored a short time after the contact RYS is turned on, and only during this time the contact RYD is turned on.

Then, relay RYI operates in response to this, and contact RY
I is self-retaining, and the contact RYI.

When the relay timer TMI is activated and the contact TMI is turned off in accordance with the time-up of the relay RYI, the relay RYI is restored, and therefore the timer TMI is also restored.

Therefore, relay RY is activated only during the time set by timer TMI.
If I is activated, the contact RYI will sound the buzzer BZ only for this predetermined period of time to issue an alarm that the one-rotation cylinder will rotate.

Further, at the same time that contact TMI is turned off, contact TMI is turned on, and relay RY2 operates accordingly.

Contact RY2s performs self-holding, and contact RY2s
2□ In order to start the timer TM2, contact TM2. is turned off, relay RY2 is restored, and timer TM2 is also restored accordingly. Therefore, relay RY2 operates only during the set time of timer TM2. Contacts RY2. Therefore, the electromagnetic switch MS is operated only during this rotation time, and AC power 3φAC is applied to the main motor M of the printing press via the contact MS.
The rotary cylinder is rotated only during the rotation time.

On the other hand, contact TM2. At the same time as turning off contact TM2. When ON, relay RY3 operates according to the resistance, and contact RY
3m, and the timer TM3 is started by the contact RY3°, so the timer TM3 times up and the contact TM3. If you turn it off.

Relay RY3 is restored, and accordingly timer TM
3 will also be restored.

Then, contact TM3. Since the contact TM3□ is turned on at the same time as the relay RYI is turned off, the relay RYI operates again and performs self-holding, and also starts the timer TMI, and the above control operation is repeated.

Therefore, the setting time of timer TM3 is different.

The stop time is determined, and the AC power supply 3 is supplied to the motor M according to the stop time and the rotation time determined by the timer TM2.
φAC is applied intermittently, the rotating drum rotates intermittently, and the buzzer BZ sounds just before the start of each rotation.

Also, if stop switch Sg is turned off, relay R
When the YS recovers and returns to the ready state, the motor M will immediately stop even if it is running, but unless the cleaning switch SC is turned off, the operation of the start switch S8 will continue as described above. Control operations are resumed.

However, the configuration shown in the figure can be selected arbitrarily depending on the situation, and the cleaning switch Sc may be omitted if it is not convenient.

Alternatively, a semiconductor logic element may be used in place of the relay, and various modifications are possible.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, when the start switch is operated, the one-turn cylinder automatically rotates intermittently, and the operator can concentrate on cleaning work. Therefore, work efficiency is improved, and remarkable effects can be obtained in various rotary printing machines.

[Brief explanation of drawings]

The figure is a circuit diagram showing an embodiment of the present invention. SC: Cleaning switch, Ss°°°° start switch, SE: Stop switch. RYC, RYS, RYD, RYI~RY3...Relay. TMD, TMI-TM3 --- Timer, PL...
- Indicator light, BZ...Buzzer, MS...Electromagnetic switch, M...Motor, 3φAC...AC power supply. Patent applicant Komori Printing Machinery Co., Ltd.

Claims (1)

[Claims] A start switch for intermittently rotating a rotary cylinder of a rotary printing press, and a control circuit that performs a control operation in response to the operation of the switch and intermittently supplies power to a motor that drives the rotary cylinder. A control device for cleaning a web of a rotary printing press.