JPS6331770B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying machine in which an original and photosensitive paper are overlapped and exposed, and then separated by a separating device, the original is conveyed to an original ejecting section, the photosensitive paper is conveyed to a developing section, and copies are made. It is.

This type of copying machine accurately detects separation or non-separation between the original and the photosensitive paper, and if they are not separated, they are ejected from the machine without fail, and the original does not enter the developing section and cause contamination. It is important to reliably prevent accidents in which the photosensitive paper enters the document circulation path and interferes with subsequent exposures. For this reason, the following separation safety device is proposed in Japanese Patent Application No. 152900/1983. That is, a first paper detector consisting of a micro switch is provided in the middle of the path of the document after separation, and a first switching body is provided downstream from the first detector in the document conveyance direction to switch between the document and the external discharge path. In addition, a second paper detector consisting of a micro switch is provided in the middle of the path of the photosensitive paper after separation, and a second paper detector is provided downstream from the second detector in the paper transport direction to switch to an external discharge path. A switching body is provided, and the two detectors are arranged so that one detects paper before the other during normal separation, and are electrically connected in series to determine whether or not paper is detected by both detectors. This combination controls the switching of both the first and second switching bodies.

On the other hand, due to the above-mentioned separation safety device, when the document and photosensitive paper are not separated, the polymer of the original and the photosensitive paper is discharged outside the machine via the external discharge path, but this photosensitive paper has been properly exposed. .

Therefore, a photosensitive paper insertion port is usually provided in which the photosensitive paper is returned directly to the entrance of the developing section. However, one of the problems in this case is that the value of a copy counter provided to count the number of copies does not match the number of copies actually obtained.
For example, if a copy counter is connected to an AND gate that has two input signals from both the first and second detectors, the counter will not count when there is no separation, so the The contents of the counter differ from the actual contents by the number of sheets of photosensitive paper returned to the developing section from the photosensitive paper insertion slot. Furthermore, if an OR gate is used instead of the AND gate, the counter value will always increase regardless of whether or not the photosensitive paper ejected during non-separation is manually inserted from the photosensitive paper insertion slot. Of course the second
If a separate paper detector dedicated to copy counting is installed after the switching unit, for example near the entrance of the developing section, it is possible to have the counter count the number of copies actually obtained. Providing a switch or the like in the copying machine poses the risk of splashing liquid from the developing section, and if this is to be avoided, special parts and configurations are required, which impairs the assemblability and maintainability of the copying machine.

An object of the present invention is to provide a copy counter device for a copying machine that does not have the above-mentioned drawbacks, and an embodiment shown in the drawings will be described below.

FIG. 1 shows a copying machine main body 1 and an automatic paper feeder 20.
An example of a diazo copying machine having a document return device (repeat device) 30 is shown. In the figure, the upper surface of the automatic paper feeder 20 forms a document insertion table 20a, and a stack of photosensitive paper 22 placed in advance with the photosensitive surface facing upward is stored below the document insertion table 20a.
A paper feed roller 23 is provided on the upper surface of the photosensitive paper bundle 22 and contacts it with an appropriate pressing force. When the operator feeds document 0 into the machine through the insertion slot 20b, the leading edge of the document activates the micro switch 21, which causes the paper feed roller 23 to rotate a certain amount in the direction of the arrow, and the topmost sheet is exposed to light. The paper S is sent out toward the feed roller pair 24. Photosensitive paper S
and document 0 are superimposed at this pair of rollers 24 and conveyed to exposure section 2 of main body 1 of the copying machine. In the exposure section 2, a colorless and transparent glass printing cylinder 3 containing a built-in light source is wrapped around and driven by an endless belt 9 stretched around a plurality of rollers 4, 5, 6, 7, and 8 to rotate. The polymer of the original 0 and the photosensitive paper S is exposed while moving in close contact with the outer peripheral surface of the printing cylinder 3. The polymer sent out from the exposure section 2 is automatically separated by a pair of shifting rollers 10 with different circumferential speeds and a separating device 11, and is separated into originals 0.
is conveyed in the direction of arrow B, and the photosensitive paper S is conveyed in the direction of arrow C. After the photosensitive paper enters a roller type developing device 12 and is developed, it is discharged into a copy tray 14 by a discharge roller 13. On the other hand, the separated document 0 is conveyed again toward the entrance of the exposure section via the repeat device 30.

The repeat device 30 is provided with an endless belt 33 that is stretched between rollers 31 and 32, and conveys the separated original toward the feed roller pair 24. 35 is a passage switching claw (first switching body);
are arranged at appropriate intervals on the shaft 34,
During the repeat, it moves to the position shown by the solid line, and when the repeat ends, it moves to the position shown by the broken line. This operation is carried out by solenoid 101.
This is achieved by controlling the rotation of the shaft 36 as shown in FIG. When the first switching member 35 is in the solid line position, the document passes under this switching member 35 and the belt 3
3, and the original is circulated. However, when the first switching member 35 is at the broken line position, the document is pulled away from the belt surface, and the switching member 35
The document is sent along the upper surface of the document to a pair of discharge rollers 36 and discharged onto a document receiver 39 outside the machine. Above the repeat belt 33, that is, near the roller 31, there is a micro switch S1 having an actuator 15 for detecting the paper delivered to the repeat device 30.
A micro switch 37 (first detector) is provided below the repeat belt 33, that is, in the vicinity of the roller 32, for detecting the insertion of a document that has passed through the first switching body 35 and is returned.

A pair of rollers 16 is provided in the photosensitive paper path from the separating device 11 to the entrance of the developing section, and immediately after the pair of rollers, a path switching plate (second A micro switch S2 (second detector) is provided between the second switching member 17 and the separating device 11 to detect the paper leaving the separating device 11 and heading toward the developing device 12. ) is provided. The second switching body 17 is normally located at the position shown by the solid line, that is, the position where the outside D direction passage is opened, and is switched to the position shown by the broken line only when the solenoid 102 (Fig. 2) is energized. There is.

As shown in FIG. 2, the two detectors S1 and S2 are electrically connected in series;
Solenoids 101, 102 of switching bodies 35 and 17
The second detector S2 switches the energization to the second detector S2. However, the mounting position of the second detector S2 is determined so that the second detector S2 detects the paper earlier than the first detector S1 in terms of timing.

When the original and the photosensitive paper are normally separated and transported in the directions of arrows B and C, first, the second detector S2 is actuated by the photosensitive paper, and the second detector S2 is activated to the solenoid 102 side of the second switching body 17. Switch. Thereafter, when the original passes, the first detector S1 is actuated and the solenoid 102 is energized, the second switching body 17 is rotated to the position shown by the broken line, and a passage leading to the developing section is opened. Since the solenoid 101 is not energized, the first switching body 35 keeps the recirculation path open. Therefore, the original is recirculated via the repeat device 30, and the photosensitive paper is conveyed to the developing section, developed, and then discharged to the copy receiver 14.

Next, if the original and the photosensitive paper are not separated and both move in the direction of arrow B and are transported through the original path, only the first detector S1 is activated, the solenoid 101 is energized, and the first switching body 35 is activated. The machine switches to the E direction and the original and photosensitive paper are ejected outside the machine. Furthermore, if the original and the photosensitive paper are not separated and both proceed in the direction of arrow C and are conveyed along the path of the photosensitive paper, only the second detector S2 is activated and the contact is switched to the solenoid 102 side. Since the first detector S1 is not turned on, neither solenoid is energized, and the second switching body 17 remains open to the outside of the machine in the direction D, so the original and photosensitive paper are moved in the direction of arrow D. and ejected from the aircraft.

Among the polymers that were urgently discharged outside the machine without being separated as described above, the photosensitive paper can now be returned to the main body of the copying machine through the photosensitive paper insertion slot 19 in order to undergo development processing and make normal copies. ing. This photosensitive paper insertion slot 19 operates the actuator 15 of the first detector S1 when the photosensitive paper is inserted into the separation device 1.
1 and the second detector S2. Therefore, insert the photosensitive paper into the insertion slot 19.
When the photosensitive paper is returned to the inside of the machine, the first detector S1 and the second detector S2 are turned on, the second switching member 17 opens the path to the developing section, the photosensitive paper is guided to the developing section, and after development is completed, copies are made. It is discharged into the receiver 14.

FIG. 3 shows both the first and second detectors S1 and S.
2 is a circuit diagram of a copy counter device according to the present invention that is capable of counting the correct number of copies using 2. 40 is a normal separation detection circuit using a D flip-flop 41, the data input terminal D of this flip-flop 41 is connected to the first detector S1, the clock input terminal C is connected to the second detector S2, and the set output terminal Q is connected to one input terminal of an OR gate 50 to which a copy counter 51 is connected. Therefore, when the original and the photosensitive paper are separated normally and the original is guided in the direction B and the photosensitive paper is guided in the direction C in FIG. Since the signal from S1 first enters the D input terminal, and then the signal from S2 enters the C input terminal, the flip-flop 41 is set, and the counter 51 is incremented by the set output. After the counter 51 is incremented, the flip-flop 41 is reset to its initial state by a reset signal 52 from a reset switch or the like (not shown) to prepare for the next copy count.

60 is a non-separable detection/memory circuit having two D flip-flops 61 and 62. The D input terminal of the flip-flop 61 and the C input terminal of the flip-flop 62 are connected to an inverter 63 connected to the first detector S1. The C input terminal of flip-flop 61 is connected to the second detector S2, and the D input terminal of flip-flop 62 is connected to an inverter 66 connected to the second detector S2. As a result of this connection, under normal conditions when both the first and second detectors S1 and S2 are OFF, both flip-flops 6
Inverter 6 is connected to each D input terminal of 1 and 62.
3.66 positive voltages are applied. For this reason, the flip-flop 62 is activated when the first detector S1 detects the leading edge of the polymer of the original and the photosensitive paper, turns ON once, then detects the trailing edge of the same polymer, and turns OFF again. It is set when a positive voltage appearing on the C input terminal is applied to the C input terminal. Further, the flip-flop 61 is set immediately when the second detector S2 is turned on.

Reference numeral 70 denotes a count correction circuit for the photosensitive paper that is ejected outside the machine when it is not separated and is returned to the machine from the photosensitive paper insertion slot 19. This count correction circuit 70
consists of an OR gate 71 which receives as two inputs the signals from the set output terminals Q of the flip-flops 61 and 62 of the non-separable detection/memory circuit 60, and a D input terminal connected to the OR gate and a second C input terminal. and a D flip-flop 72 connected to the detector S2. When the original and the photosensitive paper are not separated, the set output from either one of the flip-flops 61 or 62 of the non-separation detection/memory circuit 60 is input to the D input terminal of the flip-flop 72. Therefore, the flip-flop 72 is set only when the photosensitive paper is subsequently returned into the machine from the photosensitive paper insertion slot 19, that is, when the second detector S2 is turned on and a positive signal is applied to the C input terminal. Ru. The set output of the flip-flop 72 is sent to the counter 51 through the OR gate 50 to increment the counter and also to the non-separable detection/storage circuit 6.
0 to the reset input terminals of flip-flops 61 and 62 to reset these flip-flops 61 and 62 to their initial states in preparation for the next copy count. Incidentally, when the counter 51 increments,
The flip-flop 72 is the flip-flop 41
Similarly, it is reset to the initial state by a reset signal 52 from a reset switch or the like.

The counter device described above simply sets the flip-flops 61 and 62 of the non-separation detection/memory circuit 60 when the photosensitive paper and the original are ejected outside the machine without being separated. Only when the paper is returned from the photosensitive paper insertion slot 19 to the path to the developing section, the flip-flop 72 of the count correction circuit 70 is set when the second detector S2 detects the photosensitive paper, and the counter 5
1 is incremented. In addition, when the original and the photosensitive paper are separated normally, both the first and second detectors S1 and S2 are turned on at different times.
Flip-flops 61 and 62 of memory circuit 60 do not work. That is, at the time when the second detector S2 detects the leading edge of the separated photosensitive paper and its rising signal becomes the clock input of the flip-flop 61, the first detector S1 is already detecting the separated document, and therefore the flip-flop Since the output of the inverter 63, which is the D input of the flip-flop 61, is at L level, the flip-flop 61 is not set. Also, regarding the flip-flop 62, the rear end of the separated document is
When the output of the inverter 63 returns to the H level after passing through the detector S1 and becomes the C input of the flip-flop 62, the second detector S2 is still detecting the separated photosensitive paper, and therefore the flip-flop 62 is Since the output of the inverter 66, which is the D input of the flip-flop 6, is at L level, the flip-flop 6
2 is also not set.

Therefore, the counter 51 accurately counts the number of copies actually obtained, including the copies returned from the photosensitive paper insertion slot 19 and processed for development.

In FIG. 1 above, the second detector S2 is provided at a position where it is activated before the first detector S1, but this can also be reversed. In that case, the electrical connections between the first and second detectors S1 and S2 are as shown in Figure 2.
In FIG. 4, S1 and S2 can be simply replaced. Further, both the first switching body 35 and the second switching body 17 normally open a discharge path to the outside of the machine, and when the solenoids 101 and 102 are energized, a circulation path or a passage to the developing section is opened. You can also make it so that In short, the time required for the path switching operation of the switching body is guaranteed regardless of the copying speed,
Alternatively, switches S1 and S2 can be used to eliminate instantaneous switching operations and further prevent jams.
All you have to do is shift the timing of the operation.

Since both the first and second detectors S1 and S2 are necessarily located at a distance from the developing device, there is no danger of liquid splashing from the developing section.

In the circuit shown in FIG. 3 above, the first detector S1 and the second
The detector S2 is staggered so that when the photosensitive paper and the document are normally separated, one of them is always activated first. However, due to the structure of the machine, it may be difficult to arrange both detectors S1 and S2 so that they are offset, and even if they are arranged in this way, some abnormality may occur during transportation and the original or photosensitive sensor may be damaged. If either paper is delayed, the detector that should have been activated first will be activated later, making it impossible to correct the copy count correctly. Further, even if the photosensitive paper is not fed and only the original is conveyed, it is recognized as a non-separated state, and a counting error may occur.

Figure 4 shows the first method to eliminate this drawback.
This circuit corrects the increment of the copy counter when the second detectors S1 and S2 are not separated, without giving any time priority to the operation.

The circuit differs from the circuit shown in FIG. 3 as follows.

First, as shown in FIG. 1, an S3 for detecting paper is provided in the middle of the path where the polymer of the original and photoreceptor exits the exposure section 2 and enters the separation device 11. An AND gate 42 is added to the normal separation detection circuit 40, and the D input terminal of a D flip-flop 41 is connected to the output terminal of this gate.
The non-separable detection/storage circuit 60 is composed of an exclusive OR gate 68 and a D flip-flop 69 to which a D input terminal is connected. Further, the D input terminal of the D flip-flop 72 of the counter correction circuit 70 is directly connected to the Q output terminal of the D flip-flop 69.
The first detector S1 is connected to one input terminal of the AND gate 42 and one input terminal of the exclusive OR gate 68. Second detector S2
is connected to the other input terminal of AND gate 42 and the other input terminal of exclusive OR gate 68, and further connected to the C input terminal of flip-flop 72. And the third detector S3 is
Through the inverter 67, the flip-flop 41
and the C input terminal of 69.

The positions of the first, second, and third detectors S1, S2, and S3, that is, the conveyance distance from detector S2 to S1 and the conveyance distance from S3 to S1, are set after the polymerization of the original and the photosensitive paper. At the time when the edge is detected by the third detector S3, both the first and second detector S
1 and S2 must be in such a relationship that they have already detected the original or photosensitive paper, respectively. however,
The operating timings of both the first and second detectors S1 and S2 may be different.

In FIG. 4, if we consider the case where the original and the photosensitive paper have been separated normally, when the third detector S3 detects the rear end of the polymer, the detectors S1 and S2 have already detected the rear end of the polymer.
detects the original or photosensitive paper, so an output appears at the AND gate 42 of the normal separation detection circuit 40.
It is applied to the D input terminal of flip-flop 41. When the trailing end of the polymer finishes passing through the third detector S3, the flip-flop 41 is set by the rise of the output of the inverter 67, and this set output becomes
It enters the counter 51 through the OR gate 50 and increments the counter 51. After the counter increments, the flip-flop 41 is returned to its initial state by the reset signal 52. Detector S1 during this normal separation,
Depending on whether S2 is ON or OFF, the flip-flop 69 of the non-separable detection/memory circuit 60 does not work.

Because they are not separated, when the original and the photosensitive paper are overlaid and guided in the B direction or C direction and ejected, only the detector S1 or S2 is used.
Since it is not turned on, the flip-flop 41 of the normal separation detection circuit 40 does not work. However, non-separation detection
Regarding the memory circuit 60, when the third detector S3 detects the rear end of the polymer, the exclusive OR
Since the output of gate 68 is at H level, flip-flop 69 is set and temporarily stored. This set output becomes the D input of the flip-flop 72 of the counter correction circuit 70. After that, the operator inserts the ejected photosensitive paper into the photosensitive paper insertion slot 19.
When the second detector S2 is inserted from
2 is set. This set output is sent to the counter 51 through the OR gate.
is sent to flip-flop 69 to reset both flip-flops in preparation for the next count. After the counter 51 increments, the flip-flop 72 is reset by the reset signal 52.

FIG. 5 shows a case where photosensitive paper is inserted from the photosensitive paper insertion slot 19 when the copying machine is structured so that the detector S1 or S2 cannot be activated even if the photosensitive paper is inserted from the photosensitive paper insertion slot 19. A dedicated detector S4 is provided to detect or confirm this, and this is connected to the flip-flop C of the counter correction circuit.
This is an example of connecting to the input output terminal. Such a dedicated detector S4 may be manually operated.

FIG. 6 shows an example of a circuit designed to prevent counting errors when only a document is being transported and no copying is actually being performed. The difference from FIG. 4 is that the flip-flop 69 of the non-separable detection/memory circuit 60
However, the clear circuit 80 connected to the third detector S3
The point is that it can also be reset by . This clear circuit 80 includes a differentiating circuit 81,
It is connected to the reset input terminal of flip-flop 69 through OR gate 84.

The operation in the case of normal separation and in the case of non-separation occurring after printing of the photosensitive paper is the same as in FIG. 4.

Now, the photosensitive paper is not being fed and only the original is exposed at exposure section 2.
When it passes through the separation parts 10 and 11 and is discharged outside the machine, the flip-flop 6 of the non-separation detection/memory circuit
9 temporarily stores this non-separable state. Since the photosensitive paper is not ejected here, the photosensitive paper insertion slot 19
There cannot be any photosensitive paper inserted from the inside.

Next, the original is inserted again through the original insertion opening 20b, overlapped with the photosensitive paper, passed through the exposure section 2, and the leading edge of the polymer reaches the third detector S3. Third
When the detector S3 turns on, the rising edge is differentiated by the differentiating circuit 81 of the clear circuit 80 and enters the non-separable detection/memory circuit, and the flip-flop 6
Reset 9. Therefore, the set output from flip-flop 69, which had been applied to the D input terminal of flip-flop 72 of the count correction circuit, temporarily disappears. As a result, the count correction condition is no longer entered, thereby preventing a counting error in which the flip-flop 72 is set and the counter 51 is incremented when paper is not fed.

Note that the same effect can be obtained even if a dedicated switch is separately provided as the input means to the clear circuit 80.

Although the present invention has been described above using a copying machine having a photosensitive paper feeder 20 and a repeating device 30, the present invention is not limited to this. It is clear that any copying machine having an insertion slot 19 can be applied.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the configuration of a diazo copying machine equipped with a copy counter device of the present invention, and FIG. 2 is a connection diagram of the first and second detectors and the solenoids of the first and second switching bodies. FIG. 3 is a diagram showing an example of a counter circuit, FIG. 4 is a circuit example of a counter device of the present invention, and FIGS. 5 and 6 are diagrams each showing a modified embodiment of the present invention. 2... Exposure section, 10... Shifting roller, 11... Separating device, 12... Developing device, 17... Passage switching plate (second
(switching body), 19... Photosensitive paper insertion slot, 35... Passage switching claw (first switching body), 40... Normal separation detection circuit, 5
DESCRIPTION OF SYMBOLS 1... Copy counter, 60... Non-separable detection/storage circuit, 70... Counter correction circuit, 80... Cleaner circuit, S1... First detector, S2... Second detector, S3
...Third detector.

Claims (1)

[Scope of Claims] 1. A copying machine that overlaps an original and photosensitive paper and exposes them to light, then passes them through a separating device to separate them, transports the original to a document ejecting section and the photosensitive paper to a developing section, and copies the paper. , there is a first paper detection path in the document path after separation.
In the path of the photosensitive paper to the developing section after separation, there is a second detector for detecting the paper, and a switch downstream from the second detector in the conveying direction to switch between the output path and the outside discharge path. When the original and the photosensitive paper are not separated, the switching body is switched to a position where the outside discharge path side is opened depending on the combination of whether or not the first and second detectors detect the paper, and after exposure, A photosensitive paper insertion slot for returning undeveloped photosensitive paper discharged from the machine by the switching unit to the middle of the path from the separating device to the developing section; A third detector for paper detection is provided in the path of the paper polymer; the first, second, and third detectors are configured to detect when the third detector detects the rear end of the polymer during normal separation of the polymer. The positional relationship is such that both the first and second detectors are already detecting the original and the photosensitive paper; furthermore, when both the first and second detectors are turned on at the same time, they become active and the third detector is activated.
Normal separation detection circuit that is set when turned off;
Only one of the first and second detectors is ON
A non-separable detection/storage circuit that becomes active when the third detector turns OFF; a counter correction circuit that becomes active by the set output of this storage circuit and is set when the second detector turns ON; A copy counter device comprising: a counter that is incremented by both the set output of the circuit and the set output of the normal separation detection circuit. 2. In order to clear the memory state of the non-separation detection/memory circuit after non-separation detection in advance, the third
Claim 1 is characterized in that a clear circuit is provided that generates a clear signal when the detector or a separate switch is turned on, and the non-separable detection/storage circuit is reset by this clear signal. copy counter device.