JPH043828Y2 - - Google Patents

Description

[Detailed explanation of the idea] This idea involves injecting ink into the inside of the printing cylinder, attaching the base paper to the printing cylinder, and allowing the ink that seeps out from inside the printing cylinder to pass through the printing part of the printing cylinder and appear on the surface. The present invention relates to a single-cylinder rotary mimeographing machine that prints by feeding printing paper between a plate cylinder and an impression cylinder that rotate in close contact and transferring ink from a plate-making unit onto the printing paper.

In single-cylinder rotary mimeograph machines, in which low-viscosity ink is injected into the cylinder, and the ink appears on the cylinder surface through centrifugal force or capillary action due to rotation, the ink on the cylinder is If the ink inside the plate cylinder is left for a few minutes with the leaching part facing downward, the ink inside the plate will flow through the ink leaching part and overflow onto the surface of the plate cylinder. Ink not only drips out of the plate cylinder and stains the machine, but also drips onto the impression cylinder located below the plate cylinder, causing it to get caught in the printing paper during paper feeding, and causing serious problems if printed as is. Printing becomes impossible due to uneven printing, and a great deal of time is wasted in cleaning, inspection, and other tasks. If no base paper is attached to the printing cylinder, there is nothing that can be done about it. Also, the loss of ink on the plate cylinder is considerable.

Therefore, when the required number of sheets set on the print number display counter etc. has been printed, when there is no more printing paper on the paper tray, or when the operation switch is artificially turned off (hereinafter referred to as "when printing is finished"), ), it is necessary for the plate cylinder to stop automatically and the ink receiving part of the plate cylinder to be positioned downward, but on the other hand, when loading the base paper, the ink receiving part must be rotated upwards, which poses a dilemma. Ta.

Conventionally, some machines had a mechanism that automatically moved the ink receiving part of the plate cylinder downward and then stopped it only when printing was completed (for example, see Japanese Patent Application Laid-open No. 13106/1983). When the plate cylinder is rotated using a handle or pulley for installation or inspection of the plate cylinder, the ink leakage part of the plate cylinder is left facing downwards, causing ink to drip out of the cylinder. Things that often led to the aforementioned problems occurred.

Therefore, in order to eliminate the above-mentioned drawbacks, the present invention has been developed by artificially rotating the plate cylinder in a stopped state after printing is finished so that the ink seeping part of the plate cylinder is facing downward. After a certain period of time, an alarm sounds and the plate is stopped. The object of the present invention is to provide a new single-cylinder rotary mimeographing machine in which it is indicated that the ink receiving part of the cylinder is not stopped at a lower position.

The configuration of the present invention will be described with reference to an embodiment shown in FIG.

A plate cylinder 1 is fixed to a plate cylinder shaft 2. Plate cylinder shaft 2
includes a plate cylinder position detection cam 3 and a sprocket 5.
The sprocket 5 is connected to an electric motor 8 via a chain 6 and a sprocket 7.

The micro switch 4 is fixed to a bracket (not shown) attached to the frame at a position where the switch roller 12 comes into contact with the arcuate tip 9 of the plate cylinder position detecting cam 3.

The operation switch 10 is a switch that controls the start and stop of the machine, and together with the micro switch 4, the NOR
Connected to the input side of the circuit. An alarm sound generator 1 is connected to the output side of the NOR circuit via a timer 20.
1 is connected.

As shown in FIGS. 2 and 3, the plate cylinder 1 is mostly a net-like body with many small holes, and the plate cylinder shaft 2
Ink leaching part 14 forming a cylindrical outer peripheral surface concentric with
, a gutter-shaped ink receiver 16 that closes off the surplus outer peripheral surface, and a side shell 18 that seals and fixes both end surfaces of the cylinder.
18 and more familiar. The entire surface of the ink leaching section 14 is covered with a multi-layered screen 15, forming an ink impregnating section. Further, on the outer periphery of the ink receiving part 16, a paper stopper part 13 is provided in a strip shape parallel to the plate cylinder axis 2 for fixing the front end of the plate making paper. Therefore, the outer circumference of the plate cylinder can be roughly divided into an ink seeping section 14 and an ink receiving section 16. The ink stays here and does not drip outside.

FIG. 4 is a flowchart showing the operation of the present invention. When the switch roller 12 of the micro switch 4 does not ride on the arcuate tip 9 of the plate cylinder position detection cam 3 in the stopped state (the operating switch is off) ( When the micro switch 4 is off), the timer 20 starts measuring time, and when it counts up after a certain period of time (1 to 2 minutes) has elapsed, an alarm sounds, and the switch tip 1 is placed on the arcuate tip 9.
The alarm will not stop sounding unless the plate cylinder 1 is rotated until the plate cylinder 2 rides on the plate (the micro switch 4 is turned on). On the other hand, when the switch tip 12 rides on the arcuate tip 9 (the micro switch 4 is on), no alarm sound is generated.

In this embodiment, the plate cylinder position detection cam 3 and the micro switch 4 are used as the plate cylinder position detection device.
However, it goes without saying that the same effect can be achieved by detecting the plate cylinder position by using a disc with a slit and a photo sensor, reed switch, or Hall element instead.

Since the present invention is configured as described above,
A plate cylinder position detection cam 3 fixed to the plate cylinder shaft 2
By determining the position of the micro switch 4, the generation of the alarm sound is controlled by turning the micro switch 4 in contact with the on/off state.

Therefore, if the position of the plate cylinder position detecting cam 3 is determined so that when the ink receiving part 16 of the plate cylinder 1 comes down, the switch roller 12 rides on the arcuate tip part 9, the plate cylinder position detection cam 3 can be positioned in the stopped state. If the ink receiving portion 16 of the plate cylinder 1 is not in the downward position, an alarm starts sounding after a certain period of time and continues to sound until the ink receiving portion 16 is corrected and moved to the downward position. Therefore, by setting the time required for paper loading or inspection work in the timer 20, the plate cylinder 1 is rotated and the work is performed with the ink leaching section 14 facing downward, and this work is completed. Afterwards, an alarm will sound. In this way, the ink receiver 1
6 is not in the lower position, so that the ink leaching part 14 is not left in the lower position. Therefore, from the ink leaching section 14,
The ink inside the plate cylinder 1 drips, staining the machine,
There will be no unprintable state, no wasted effort and time to repair the problem, no inconvenience of not being able to use the machine during that time, and no loss of ink.

Although a buzzer or a bell is generally used as the alarm sound, it is even more effective to generate a voice synthesized sound.

Furthermore, in the present invention, when the ink receiver 16 is removed from the lower position, the alarm does not sound immediately, but after a certain period of time has elapsed. There is an advantage that the inspection work (1) can be carried out in a quiet state.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the control method of the present invention. FIG. 2 is a central sectional view of the plate cylinder 1. Figure 3 shows plate cylinder 1.
A perspective view of. FIG. 4 is a flowchart showing the operation. 1... Plate cylinder, 3... Cam for detecting plate cylinder position, 4...
...Micro switch, 10...Operating switch, 1
1... Alarm sound generator, 16... Ink receiver, 20
……timer.

Claims (1)

[Scope of utility model registration request] a plate cylinder having, along the circumferential direction, an ink seeping section through which ink can pass and an ink receiving section through which ink cannot pass; an actuation switch for controlling printing operation;
a detection means for detecting whether or not the ink receiver is in the lower position; a timer for measuring the time during which the ink receiver is not in the lower position when the operating switch is off; A single-barrel rotary mimeographing machine equipped with an alarm sound generator to generate an alarm sound when a measurement is taken.