JPS6134529Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an improvement in an electronic copying machine having a copy number counter that is detachable from the main body of the copying machine.

Recently, an electronic copying machine having a copy number counter that is detachable from the copying machine body has been developed and put into practical use. However, if the above-mentioned counter is set and the counter is removed while copying is in progress, there is a possibility that the counter will not count the number of copies and a problem may occur in which normal copies may be obtained. . In this case, it becomes impossible to accurately count the number of copies. Therefore, as a countermeasure to such problems, measures have been considered, such as stopping the drive system of the developing unit to prevent normal copies from being obtained, but such measures do not require a large amount of effort. It has drawbacks such as the need for equipment, making it impractical.

This idea was made in view of the above circumstances,
The object thereof is to provide an electronic copying machine having a removable copy number counter that can always accurately count the number of copies with a relatively simple configuration.

An embodiment of this invention will be described below with reference to the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a main body of a copying machine, and a document table 2 is provided on the upper part of the main body 1 so as to be movable back and forth in the direction of arrow a. Also, main body 1
An operation panel 3 is provided on the top of the unit, and the operation panel 3 includes a power switch 4, a copy switch 5, a keyboard 6 for setting the number of copies, a copy number counter 7, a copy density adjustment dial 8, and a checker for abnormalities. Lamp 9, paper supply lamp 10, power lamp 1
1, a ready lamp 12, a cumulative counter 13 for cumulatively totaling the number of copies, and the like. On the other hand, a photosensitive drum 13 that rotates in the direction of arrow b in the figure is provided approximately at the center of the main body 1 . A charger 1 for charging is provided around the photoreceptor drum 13.
4, an exposure device 15, a developing device 16, a transfer charger 17, a peeling charger 18, a static elimination charger 19, a cleaning device 20, and the like are arranged radially. Further, between the charger 14 and the exposure device 15, there is provided a static eliminator, for example, a static eliminator lamp 21, which removes the charges on the photoreceptor drum 13. A paper cassette 22 is detachably provided at the bottom of the main body 1, and the transfer paper supplied from this cassette 22 is transported along a transport path 23 and placed between the photoreceptor drum 13 and the charger 17. The paper is then sent to a fixing device 24 via a paper exit 25 and then delivered to a tray 26. In addition, 27 in FIG. 2 is a toner replenishing device, and 28 is a toner replenishing device.
is a dust collector.

Further, a copy number counter 29 that is detachable from the main body 1 is provided at a predetermined position on the upper part of the main body 1. That is, as shown in detail in FIG. 3, a counter receiving socket 30 is provided in the upper part of the main body 1, and the counter 29 can be attached to and removed from the socket 30 from outside the main body 1. . The socket 30 is connected via a wire harness 31 to a connector 33 provided on a control printed circuit board 32 within the main body 1. In addition,
The counter 29 is, for example, a so-called key counter, and is a detector for detecting the attachment/detachment state of the socket 30, for example, the key switch 3.
4 (see Figure 4). Further, on the printed circuit board 32, a switching jumper wire 35 is provided as a selection means for selecting whether or not to use the counter 29. The switching jumper wire 35 is kept connected when the counter 29 is not used, and is disconnected when the counter 29 is used. Furthermore, a microprocessor unit 36 (see FIG. 4) is provided on the printed circuit board 32 for controlling the entire copying machine. Note that 37 in FIG. 3 is an original platen switch 37 that detects the start of movement of the original platen 2.
It is. Here, the key switch 34, the microprocessor unit 36, and the document table switch 37 cause the counter 29 to switch to the main body 1 during copying.
It constitutes a detection means for detecting that it has been removed from the device.

Next, the operation when the counter 29 is set and used in such a configuration will be explained with reference to the flowchart shown in FIG. In this case, the switching jumper wire 35 is first cut. However,
By turning on the power switch 4, the fuser 24
After that, the temperature reaches the fixing temperature, and the counter 29 waits until it is set. At this time, when the counter 29 is inserted into its socket 30, the key switch 34 detects this and turns on, and the ready lamp 12 is lit by the on signal and waits for the copy switch 5 to be pressed.
If the counter 29 is removed from the socket 30 in this state, the ready lamp 12 goes out and copying becomes impossible. When the counter 29 is set and the copy switch 5 is pressed, transfer paper is supplied from the paper cassette 22 and transferred to the conveyance path 23.
The photoreceptor drum 13 and the charger 17 are transported by the photoreceptor drum 13 and the charger 17 . The surface of the photoreceptor drum 13 is given a certain electric charge in advance by the charger 14,
Reflected light from the original on the original platen 2 is guided to this charged surface by the exposure device 15. This results in
A latent image of the original is formed on the surface of the photosensitive drum 13. A developing device 16 adsorbs toner on this latent image, and a charging device 17 applies the toner to the transferred paper.
It is transferred and visualized by the action of The transfer paper after this transfer is sent to the fixing device 24 where it is fixed, and then discharged from the paper discharge port 25 to the tray 26.

On the other hand, the document table 2 starts moving when, for example, a detector (not shown) provided at a predetermined portion of the transport path 23 detects transfer paper supplied from the paper cassette 22. The document table switch 37 detects the start of movement of the document table 2 and sends the detection signal to the microprocessor unit 36. The microprocessor unit 36 is connected to the document table switch 37.
Depending on the timing of the detection signal from the counter 29
It is determined based on the signal from the key switch 34 whether or not the key has been removed from the socket 30. That is, when the document table 2 starts to move, the document table switch 37 is turned on, and when the document table switch 37 is turned on, the microprocessor unit 36 checks whether the key switch 34 is on or not, and determines whether or not the key switch 34 is on. If it is not turned on, it is determined that the counter 29 is attached, and if it is not turned on, it is determined that the counter 29 is not attached (removed). As a result of this judgment, if the counter 29 is installed (if the key switch 34 is turned on), the microprocessor unit 36 sets the counter 29 to "+1" and allows the subsequent copying process to continue normally. However, as a result of the above judgment, the counter 29
If the photoreceptor drum 13 is not attached (if the key switch 34 is not turned on), the microprocessor unit 36 turns on the charge removal lamp 21 to remove the electric charge accumulated by the charger 14 on the photoreceptor drum 13. As a result, it becomes impossible to obtain a normal image for the latter half of the copying that is currently being performed, and the counter 29
The counted value and the normal number of copies match. In other words, it is possible to accurately count the number of copies.

As detailed above, according to this invention, there is a detecting means for detecting that the copy number counter is removed from the copying machine body during copying, and a detecting means for detecting that the copy number counter is removed from the copying machine main body, and a detecting means for detecting that the copy number counter is removed from the main body of the copying machine during copying. By providing an erasing means for erasing at least a portion, it is possible to provide an electronic copying machine having a removable copy number counter that can always accurately count the number of copies with a relatively simple configuration.

[Brief explanation of the drawing]

The figures show one embodiment of this invention. Figure 1 is an external perspective view showing the overall structure, Figure 2 is a side view showing the internal mechanism, and Figure 3 is a part related to the copy number counter. FIG. 4 is a block diagram schematically showing the control system, and FIG. 5 is a flowchart for explaining the operation. 1... Copying machine main body, 13... Photosensitive drum, 1
4... Charger for charging, 15... Exposure device, 21...
... Static elimination lamp (static eliminator), 29 ... Copy number counter, 30 ... Socket, 34 ... Key switch (detector), 35 ... Switching jumper wire (selection means).

Claims (1)

[Scope of utility model registration request] In an electronic copying machine that has a copy number counter that is removably attached to the copy machine body and that starts copying when the copy number counter is installed, the copy number counter an electronic device comprising: a detecting means for detecting that the image is removed from the copying machine body; and an erasing means for erasing at least a part of the image being copied in response to the detection result of the detecting means. Copy machine.