JPS62222947A - Inside-jam detecting method for original and sensitizer paper in diazo-copying machine - Google Patents

Abstract

PURPOSE:To prevent a succeeding superimposed body from jamming inside the machine, by detecting a first inside jam of the superimposed body of an original and sensitizer paper speedily with a simple circuit structure, in the diazo-copying machine in which plural superimposed body of the original and the sensitizer paper are conveyed. CONSTITUTION:A microcomputer (CPU) 10 is provided with input terminals P1-P5 and output terminals P6-P8. A light emitting diode 20 is connected to the output terminal P6 via an inverter 18, and when an inside jam occurs, this diode 20 is operated, warning an operator of this occurrence. A buzzer 24 is connected to the output terminal P7 via an inverter 22, so that if a paper jam occurs, this buzzer is made so as to be driven for warning. In this connection, at normally, the time required till each sensor outputs the detection signal after detecting each rear end of an original and sensitizer paper is previously known, so that if even one piece in plural counters installed inside the CPU 10 passes the specified time, a fact that the paper jam is occurring is made out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method for detecting jamming of a polymer between a document and photosensitive paper in a diazo copying machine.

[Prior art and its problems] First, an outline of a diazo copying machine having an automatic photosensitive paper feeding device (automatically feeding photosensitive paper into the copying machine) will be explained. Since this is well known to the industry, I will keep it simple. It should be noted that the present invention is not limited to copying machines that automatically feed photosensitive paper.

When the leading edge of the inserted document is detected by a sensor provided in the document insertion detection section, the photosensitive paper feeding roller starts rotating and starts carrying the photosensitive paper into the machine. The photosensitive paper passes through a photosensitive paper detection sensor, the original and the photosensitive paper are overlapped at a portion of the stopper, and are transported to a printing section at a predetermined timing. The printing section includes an exposure lamp, a transparent printing cylinder provided outside the exposure lamp, and a printing belt provided around the cylinder. The photosensitive paper is then printed on the photosensitive paper.

Next, the polymer of the original and photosensitive paper (hereinafter sometimes simply referred to as polymer) is separated from the printing cylinder by a polymer separator and sent to an original/photosensitive paper separator. Manuscript/
A photosensitive paper separator separates an original from a photosensitive paper by, for example, air suction. The separated originals are ejected to the original tray by the original ejection roller, while the separated photosensitive paper is
The photosensitive paper is conveyed to the developing section by a roller.

The document/photosensitive paper separating section includes a separated document ejection sensor and a separated photosensitive paper detection sensor, which detect the passage of the document and the photosensitive paper, respectively.

As described above, in a diazo copying machine, the path from when the original and photosensitive paper are inserted until they are ejected from the machine is generally long. Therefore, especially if the polymer stays at the polymer separation section or the polymer stays at the original photosensitive paper separation section, the originals and photosensitive paper that are successively brought into the machine will also stay there. There is a problem with doing so.

In other words, there is a problem in that one lingering on the aircraft causes many lingering on the aircraft. Therefore, it is necessary to promptly detect the first stoppage in the machine, stop the operation of the copying machine, notify the operator of the stoppage in the machine by means of a lamp or a buzzer, and stop the drive motor of the copying machine.

However, conventionally, there has been no diazo copying machine that takes such measures.

[Object of the present invention] Therefore, the object of the present invention is to provide a diazo copying machine that
To provide a method for detecting the retention of a document and photosensitive paper in a diazo copying machine, which promptly detects the initial retention of a polymer of the original and photosensitive paper in the machine, and prevents subsequent retention in the machine.

[Means and effects for solving the problem] To achieve this object, according to the present invention, in a diazo copying machine in which a plurality of polymers of originals and photosensitive paper are conveyed, Regarding the method of detecting stagnation, prepare counters equal to or greater than the number of the above-mentioned plurality of polymers, start counting the above-mentioned plurality of counters in sequence every time at least a document or a polymer is inserted into the machine, and then When it is confirmed by the detection means provided on the conveyance path that no polymer remains in the machine, the counter assigned to the polymer stops counting, while any one of the plurality of counters counts a predetermined number. If it has finished, it is assumed that the polymer is stuck on the plane.

[Example] FIG. 1 is a circuit diagram briefly showing a circuit for implementing the method according to the present invention. In FIG. 1, 10 indicates a microcomputer (CPU), and this microcomputer has input terminals P1 to P5 and output terminals P6 to P8.

A signal that detects the trailing edge of the inserted original is inputted to the input terminal PL from a document insertion sensor provided in the document insertion detection section, and a signal that detects the trailing edge of the inserted document is input to the input terminal P2. A signal detecting the trailing edge of the photosensitive paper is input from the paper sensor. On the other hand, input terminal P3 receives a signal that detects the trailing edge of the original to be ejected outside the machine from the separated original ejection sensor provided in the original/photosensitive paper separation section, while input terminal P4 receives the same signal. A signal that detects the trailing edge of the photosensitive paper is input from a separated photosensitive paper sensor provided in the document/photosensitive paper separating section. Furthermore, a signal proportional to the transport speed of the transport path of the copying machine is input to the input terminal (or interrupt terminal) P5. In the illustrated example, a pulse wheel 14 is fixed to an appropriate drive shaft 12 of the copying machine, and a signal from a pulse generator 16 provided near the pulse wheel 14 is used to detect the conveyance speed of the conveyance path of the copying machine. is input to input terminal P5.

A light emitting diode 20 is connected to the output terminal P6 via an inverter 18, and when an in-machine stagnation occurs, this light emitting diode is activated to alert the operator that the in-machine stagnation has occurred. A buzzer 2 is connected to the output terminal P7 via an inverter 22.
4 is connected and this buzzer is activated when an in-flight stoppage occurs. Furthermore, a signal for stopping the drive motor of the copying machine is outputted from the output terminal P8 in response to the occurrence of in-machine stagnation.

The gist of the present invention is as follows. First, the CPU'
10 is provided with a plurality of counters that start counting after detecting the trailing edge (or the front edge) of the original and the photosensitive paper. The number of counters is equal to or greater than the maximum number of polymers of originals and photosensitive paper that are transported simultaneously inside the copying machine, and a separate counter is assigned to each polymer in the copying machine to measure the transport time. By the way, in a normal state (that is, a state in which no polymer remains in the machine), after the trailing edge of the original and photosensitive paper is detected, the separated original ejection sensor and the separated photosensitive paper sensor (
Since the time required for each of the counters (provided in the document/photosensitive paper separation unit) to output a detection signal is known in advance, it is possible to detect whether even one of the plurality of counters has elapsed by the predetermined time. For example, it can be seen that the aircraft is stuck on board. In order to assign a separate counter to each of the plurality of polymers described above, the present invention includes a counting start counter indicating pointer;
A counting stop counter search pointer is also provided.

Next, an embodiment of the present invention will be described with reference to process flowcharts shown in FIGS. 2 and 3. Note that steps 48 and 49 are other control routines unrelated to the present invention, and may be omitted from illustration.

In the initial setting step 50 of FIG. 2, a plurality of counters (
(numbered from 1 to N), the value of the counting start counter instruction pointer is set to 1, and the coefficient stop counter search pointer is reset.

To simplify the explanation, first, assume Assumption A: (a) only one sheet of the original is copied in photosensitive paper automatic feeding mode, and (b)
It is assumed that the original and the photosensitive paper are normally carried into the copying machine, and (c) the polymer of the original and the photosensitive paper, and the original and the photosensitive paper alone do not stay in the copying machine.

As described above, since it is assumed that the operator has selected automatic paper feeding, the process proceeds from step 52 to step 54, and when the trailing edge of the document is detected by the document insertion sensor in step 54, the process proceeds to step 56. move on. Step 56
In step 58, when the photosensitive paper feed sensor detects the trailing edge of the photosensitive paper, the process proceeds to step 58. Based on the above assumption, the counting start counter instruction pointer is set to l, so in step 60, the counter l is set and counting starts. Next, in step 62, 1 is added to the count start counter instruction pointer (that is, the contents of the count start counter instruction pointer become 2), and in step 64, the value of the count start counter instruction pointer is determined to be equal to (N+1). Check. In this case, since they are not equal, in step 66 of FIG. 3, it is determined whether the separated original discharge sensor has been turned off from the on state (that is, whether the rear end of the separated original has been detected). Note that the separated document ejection sensor is off when there is no document.
Turns on if a manuscript exists. In other words, turning from off to on means that the trailing edge of the document has been detected. Based on the above assumption, the trailing edge of the separated document is detected, so the process goes to step 70, where the counting stop counter search pointer (PT2) is set to the counting start counter instruction pointer (P
Set the value of TI). That is, since the content of PTl is currently 2, 2 is set in FT2 and the process goes to step 72. In step 72, it is determined whether the counter indicated by PT2 (counting stop counter search pointer) is counting.

Currently, counter 2 is not counting, so step 74
In step 76, 1 is added to FT2 (i.e., the content of PT2 becomes 3), and in step 76, the content of PT2 becomes (N+1
) is equal to or not. In this case, since they are not equal, the process goes to step 78 (where N is a positive integer of 3 or more) and it is determined whether the contents of PTI are equal to the contents of PT2. Since they are not equal in their current state (i.e., P
The content of TI is 2 and the content of FT2 is 3) Step 7
Returning to step 2, it is checked whether the counter 3 designated by PT2 is counting. According to the above assumption, counter 3 is not counting, so the content of PT2 becomes 4 in step 74. In this way, the content of PT2 is increased by 1, and when it is determined in step 76 that the content of PT2 has become (N+1), step 8o
In this case, the content of PT2 is set to 1. Next, step 7
In step 72 via step 8, it is found that the counter l is counting, so in step 82,
Counter 1 stops counting. Then step 84
, it is checked whether any of the counters 1 to N has completed counting a predetermined number of times. In the above assumption, since the counter 1 has already stopped counting midway through counting, the process returns to step 52 via step 48.

Next, as assumption B, a case will be described in which, in the above-mentioned assumption A, the original and the photosensitive paper cannot be separated and the polymer is transported toward the developing section. In this case, the polymer is not stuck onboard. In this assumption B, the process goes from step 66 to step 86, in which it is detected that the separation photosensitive paper sensor has changed from on to off, and in step 70
go to. The separation photosensitive paper sensor is off when there is no photosensitive paper, and turns on when there is photosensitive paper, and detects the transition from on to off and detects the separation of the photosensitive paper (in this case, the polymer). Know about edge passing. The processing from step 70 onwards is the same as in the case of assumption A described above, so the explanation will be omitted.

Assumption C assumes that both the separated original discharge sensor and the separated photosensitive paper sensor do not detect anything. In this case, after steps 66 and 86, it is determined in step 84 whether any of the counters INN (in this case, only counter 1) has finished counting. If the counter 1 has not completed the predetermined count at this point, the process goes through step 49 in FIG. 3, goes through the steps in FIG. 2, goes through steps 66 and 86 again, and goes to step 84.
It is checked whether any of the counters 1 to N has finished counting. In assumption C, the completion of counting by the counter 1 is always detected in step 84, so the process goes to step 88, and the processing explained in FIG. 1 is performed as if an in-flight stoppage has occurred.

Next, let us consider the case where N pieces of a polymer of a document and photosensitive paper are successively inserted into a copying machine. In this case, step 5
At 8.90.92, according to the contents of the PTI, respectively go to step 94.96 and start counting the corresponding counter. The subsequent processing is similar to the case described above. Note that after the counter N starts counting, step 64 is performed.
In step 98, it is detected that the content of PTI has become (N+1), so in step 98, 1 is set in PTI and the process returns to the initial state. In other words, counters 1 to N are
Assigned to multiple polymers sequentially and without duplication.

On the other hand, if automatic paper feeding is not selected, step 52
, manual paper feeding is detected. Next, when the trailing edge of the overlapping body of the original and the photosensitive paper is detected in step 100, the process proceeds to step 60, and the subsequent processing is the same as that described above.

In FIG. 1, when the input terminal P5 is an interrupt terminal, the count number of the counter that starts counting is increased every time an interrupt signal is generated, while when it is an IO input terminal, , it may be determined whether the number of pulses from the pulse wheel reaches a predetermined number, and when the number of pulses from the pulse wheel reaches the predetermined number, the count number of the counter that starts counting may be increased.

[Modification-Change] In the above description, in steps 52, 54, 66, and 86, the trailing edge of the document or photosensitive paper is detected, respectively. However, the present invention is not limited to this, and the leading edge may be detected.

[Effects of the Invention] As explained above, according to the present invention, with a simple circuit configuration, it is possible to reliably detect the retention of polymers in originals and photosensitive paper in the machine, and to prevent subsequent retention of polymers in the machine. It can be prevented.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram for implementing the method according to the present invention, and FIGS. 2 and 3 are flowcharts for explaining one embodiment of the present invention, respectively. In the figure, 10 is a microcomputer (CPU), P1 to P5 are input terminals of the CPU, and P6 to P8 are output terminals of the CPU.

Claims (2)

[Claims] (1) Regarding a method for detecting the retention of the polymer in the machine in a diazo copying machine in which a plurality of polymers of originals and photosensitive paper are conveyed, the number of counters equal to or greater than the number of polymers described above is prepared, and at least Each time a document or a polymer is inserted into the machine, the above-mentioned plurality of counters sequentially start counting, and when it is confirmed by the detection means installed in the conveyance path of the copying machine that no polymer remains inside the machine, the corresponding one is detected. A diazo copying machine characterized in that counting of a counter assigned to a polymer is stopped, and on the other hand, if any of the plurality of counters has finished counting a predetermined number, it is determined that the polymer remains in the machine. Method for detecting whether originals and photosensitive paper remain in the machine. (2) Regarding a method for detecting the retention of the polymer in the machine in a diazo copying machine in which a plurality of polymers of originals and photosensitive paper are conveyed, the method comprises: a first detection means for detecting insertion of the original or the polymer; and a photosensitive paper. a second detection means for detecting the feeding of paper, third and fourth detection means for respectively detecting the passage of the original and the photosensitive paper separated after the photosensitive paper printing process, and N counters (N is one of the plurality of counters mentioned above). (an arbitrary integer greater than or equal to the number of polymers), a first pointer that indicates a counting start counter, and a second pointer that searches for a counter that should stop counting; Each time the detection means outputs a detection signal, the N counters start counting in sequence, and when either the third or fourth detection means outputs a detection signal, the counter searched by the second pointer It is determined whether or not the counter is counting, and if the counter searched by the second pointer is counting, the counting of the counter is stopped, and the second pointer is stopped.
If the counter searched by the pointer is not counting, it is determined whether the counter has finished counting, and if the counter searched by the second pointer has finished counting, it outputs a polymer in-flight stay signal; If none of the third and fourth detection means outputs a detection signal, it is determined whether any of the N counters has finished counting, and if it has finished counting, it outputs a polymer stay signal. A method for detecting that originals and photosensitive paper remain in a diazo copying machine.