JPH049187Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a device for indicating an abnormality in the supply of ink from the ink tube to the printing cylinder in a rotary copying machine. It is.

[Prior Art] Conventionally, in rotary copying machines, in order to obtain stable printed matter, an ink amount detection device for detecting the amount of ink is provided on the printing cylinder, and this detection device detects whether the amount of ink is below the required amount. Some devices are configured to replenish the necessary amount of ink from an ink replenishing device when this is detected.

There are various kinds of ink amount detection devices, and one example is one shown in FIG. 3. That is, the third
In the figure, a detection member 2 made of an oil-resistant rubber material and having a substantially L-shaped cross section is in contact with the ink-applied surface of the printing cylinder 1, and this detection member 2 is connected to a support shaft 3.
It is supported by When the ink between the sensing member 2 and the printing cylinder 1 decreases, the frictional force generated by the rotation of the printing cylinder 1 increases, causing the sensing member 2 to move together with the support shaft 3, until the amount of ink falls below the required amount. At this point, the tip of the support shaft 3 pushes the lever 5 of the micro switch 4.

When the microswitch 4 is closed, a pump (not shown) in the ink replenishing device is activated to suck out ink from the ink tube and supply ink to the printing cylinder.

[Problems to be solved by the invention] In such a conventional configuration, if the ink on the printing cylinder is less than the required amount, ink is replenished by an ink supply device, but the ink inside the ink tube is Even if the ink tube becomes empty or the ink tube is bent and ink cannot be supplied, the ink replenishing device continues to operate, which may cause the ink replenishing device to malfunction, or prevent printing. The problem was that mistakes were made. Therefore, the user must always pay attention to the condition of the ink tube.

The purpose of this invention is to solve such problems.

[Means for solving the problem] This invention includes a means for generating an ink supply abnormality signal when the ink shortage signal from the ink amount detection device continues for a certain period of time, and a means for generating an ink supply abnormality signal based on the ink supply abnormality signal. The present invention is characterized by an ink supply abnormality display device for a rotary copying machine, which comprises an indicator for indicating an abnormality.

Other objects, features and advantages of the invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings.

[Embodiment] FIG. 1 of the drawings shows an embodiment of the ink supply abnormality display device for a rotary copying machine according to this invention. The rotary copying machine in this embodiment includes the ink amount detection device 10 on the printing cylinder as described above,
A microcomputer 12 is connected between the ink amount detecting device 10 and the ink replenishing device 11. In this microcomputer 12, the ink amount detection device 1
When a signal indicating that the ink on the printing cylinder is insufficient is input from 0, an ink replenishment command signal is output to the ink replenishing device 11.
In addition, an indicator 13 such as an LED or an alarm buzzer is connected to the output side of this microcomputer 12, and when an ink shortage signal is continuously emitted from the ink amount detection device 10 for a certain period of time or more, this microcomputer 12 The computer 12 determines that ink is not being supplied from the ink tube, issues an ink supply abnormality signal, and activates the display 13. As a result, the user knows that an abnormality has occurred in the ink supply, and can stop the operation of the rotary copying machine to promptly deal with the abnormality.

Incidentally, FIG. 2 is a flowchart showing an example of a program stored in the ROM of the microcomputer 12 for carrying out signal processing within the microcomputer 12 as described above.

Further, it is more preferable that the microcomputer 12 sends a stop signal to the drive device of the rotary copying machine at the same time as the display 13 is activated in the event of an abnormality.

[Effects of the invention] As described above, according to this invention, it is possible to accurately notify that ink supply has become impossible, so the user no longer needs to pay attention to the condition of the ink tube. Furthermore, since the ink replenishing device does not have to continue operating without being able to supply ink, there are effects such as a drastic reduction in the number of failures.

[Brief explanation of drawings]

Figure 1 is a schematic explanatory diagram showing the configuration of an ink supply abnormality display device for a rotary copying machine according to this invention;
The figure shows the microcomputer shown in Figure 1.
FIG. 3 is a flowchart showing a program in the ROM, and is a schematic explanatory diagram showing an embodiment of an ink amount detection device for a printing cylinder. In the figure, 1... printing cylinder, 2... detection member, 3...
Support shaft, 4...Micro switch, 5...
lever, 10... ink amount detection device, 11... ink supply device, 12... microcomputer,
13...Indicator.

Claims (1)

[Scope of utility model registration request] An ink amount detection device for detecting the amount of ink on the printing cylinder, and an ink replenishment device for replenishing ink from an ink tube to the printing cylinder in response to an ink shortage signal from the ink amount detection device. In a rotary copying machine, means for generating an ink supply abnormality signal when the ink shortage signal from the ink amount detection device continues for a certain period of time or more, and a display for indicating the abnormality by the ink supply abnormality signal. An ink supply abnormality display device for a rotary copying machine consisting of.