JPS5846355A - Original conveyance controller of copying machine - Google Patents

Abstract

PURPOSE:To shorten the interval of conveyance of the original at the completion of continuous copying and the original of the next continuous copying, and to raise efficiency of copying operation during continuous copying, by inhibiting setting of a route changeover means to the side of a repeat route until detection of the next original on a discharge route. CONSTITUTION:An original detector SW1 is arranged on an original insertion route 3, and an original detector SW2 is arranged on an original discharge route 24. When SW1 comes into a detection state, count of a series of pulse signals generated at the pitches in synchronism to conveyance speed is started, and after the count has reached a prescribed number, SW2 comes into a detection state. At that time, a route changeover route 26 is set to the side of a repeat route 27.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a copying machine equipped with an original repeat mechanism, and more specifically, when continuous copying is set, a path switching means is set to feed an original into a repeat path, The present invention relates to a document conveyance control device in a copying machine equipped with a repeat mechanism configured to repeatedly feed a document to an exposure section for a set number of consecutive copies.

PRIOR ART In this type of document conveyance control device, as typified by a diazo copying machine, at the end of continuous copying, the path switching means is set to send the document to the ejection tray, and the continuous copying ends. When continuous copying is set, the set number of copies is counted by the document detection means placed in the document insertion path, and the count is performed by the document detection means placed in the document insertion path, and the count is performed by the document detection means placed in the document insertion path. The setting on the discharge tray side is performed by a document detection means arranged in the document discharge path.

Therefore, at the final time of continuous copying, that is, at the final count, if the next original is inserted before the original reaches the original detection means in the ejection path and is detected by the original detection means in the insertion path, the next original will be continuously copied. is restarted (counting starts) and the previous document is detected by the document detection means in the ejection path.
There is an inconvenience that the path switching means is set to the repeat path side, and the previous document is sent to the exposure section again.

For this reason, it is necessary to confirm that the previous original has been placed on the output tray before inserting the next original.

Purpose/Summary of the Invention The present invention was made with attention to the above-mentioned problem, and its purpose is to make it possible to insert the next original during the final cycle of continuous copying of the previous original, thereby eliminating the need to wait for the copying operation. The goal is to provide a document conveyance control device designed to shorten time and speed up continuous copying.The feature to achieve this is that even if continuous copying is resumed when the next document is inserted, the path switching means repeats the process. The purpose of this invention is to prohibit the setting on the path side until the next document is detected by the document detecting means in the discharge path.Hereinafter, an embodiment in which the present invention is applied to a diazo copying machine will be described.

Embodiment FIG. 1 shows a schematic configuration of a diazo copying machine to which the present invention is applied.

In the figure, when a document A inserted through an insertion slot 1 is sent into an insertion path 3 by an insertion roller 2 and detected by a detection switch SWI disposed there, a document A is inserted into an insertion path 3 by a paper feed roller 4
rotates and the photosensitive paper P is fed, and the leading edge of the original A and the photosensitive paper P are aligned by the driven roller 6, which is in pressure contact with the transport roller 5, retreating from the path and the stopper 7 entering the path (dotted line position), and then the document A and the photosensitive paper P are moved to the illustrated position. By returning to , both sheets A are removed by rollers 5 and 6.

P is a transparent cylinder 9 containing an exposure lamp 8 in a polymerized state.
and a roller 10.11.12.13.14 on its outer circumference.
The document A is conveyed to an exposure section E formed by a conveyor belt 15 that is circumferentially supported by a conveyor belt 15 and rotated in the direction of arrow a, and an image of the document A is exposed onto a photosensitive paper P.

The original A and the photosensitive paper P that have left the exposure section E pass through a single-sided guide 16 that forms a detour, and then pass through a pair of smoothing rollers 17.
1B, the leading edge of the photosensitive paper P is fed out slightly ahead of the original A, and as shown in Japanese Patent Publication No. 55-42735, the leading edge of the photosensitive paper P is conveyed to a stopper (19 is released and separated by the separation plate 20). The engaging portion 2 of the separation plate 20 is rotated and
-1, the original A is guided into the insertion part 21, passes between a roller (not shown) coaxial with the separating plate 20, and the opposing roller 22, and is separated from the insertion part 21 and sent to the developing part.
The photosensitive paper P is removed from the path of the photosensitive paper P without getting into the document discharge path 24 by the knurled roller 23, and is detected by the photodetection switch SW2 disposed there. The paper is sent to the paper path 25 and detected by the photodetection switch SW3 disposed there. At this time, if it is in the continuous copying state, the path switching plate 26 is set (broken line position) to feed the original A into the repeat path 27, and the original A is sent to the insertion path 3 via the repeat path 27 by the transport rollers 28 and 29. Then, the same operation is repeated. When the number of copies set to 0 is reached, the continuous copying state is canceled and the path switching plate 26 is set (
solid line position).

5- The above-mentioned shifting rollers 17, 18 and separation plate 20 form a separation mechanism S for separating the original A and the photosensitive paper P, and are known per se, and are described in Japanese Patent Publication No. 1566/1983. Various mechanisms, such as the suction system shown in Figure 1, are employed.

Note that the path switching plate 26 is activated when the original A and the 1-light paper P are normally separated during continuous copying, that is, when the photodetection switch S
W2. When SW3 operates together, repeat passage 27
When there is a separation failure, the switch is on the tray 30 side. On the other hand, when the photodetection switch SW2 is activated, the path switching plate 31 for the photosensitive paper P is switched to the dashed line position that guides the photosensitive paper P toward the developing device, and otherwise it is at the solid line position.
The photosensitive paper P is sent to the discharge section 34 by conveyance rollers 32 and 33.

Next, control of the above-mentioned copying machine will be explained using the electric circuit shown in FIG.

FIG. 2 shows the initial state when the power is turned on.

In Fig. 2, SW4 is a switch for setting the number of copies installed on the operation knob of the copying machine, and has four contacts a.
, b, and el d, and supplies a 106-base BCD code signal from 1 to 9 to the BCD down counter IC2. IC2 is cleared by the auto-reset circuit R when the power is turned on. As a result, IC2 is 10
Convert the BCD code of 'X□ // in base numbers, all "
L// (low level). At this time, NOR gate I
The output of C3 becomes 'H// (high level), the D-flip-flop IC4A is cleared, the output of IC4A becomes XXHtt, and the BC formed by switch SW4
Take in the D code and connect terminals Ao, Bo=C, o, D
BCD down counter IC to output the signal to
The 0BCD code signal supplied to the L terminal of 2 is sent to the numeric display element LED1 through the 7 segment decoder driver ICI.
is converted into decimal digits from SS 1 // to XX9〃. As a result, a BCD code signal other than 0 when set on IJ is applied to the input terminal of NOR game) IC3, and the output of IC3 changes from x Htt to %
I, // inverted, D-flip-flop IC
The CL terminal of 4A also becomes %L, but the output of IC4A remains at a high level.

The 7-stage binary counter IC5 and the D-flip-flop IC4B are both cleared by the -H of the Q output of IC4A, and the Q7 output of IC5 is "L", and the 4 of IC4B is cleared.
The output becomes SS H//, the CL terminal of R8-flip-flop IC6 becomes NH, and the photodetection switch S
Since W2.8W3 is open, the PR terminal of IC6 is “
It is in the H state, and its Q output is maintained at XXL //. On the other hand, the inverter IC70 input terminal is SS
H//, so its output is 1d'L. That is, the input terminals of the Nant gate IC9 are SI L // and 1H〃, so its output is ts Hp, the input terminal of the inverter ICl0 is NH〃, and the output is SS L
// and the transistor TRI is off,
Passage switching plate 26 The operating solenoid SL2 is in the OFF state, and the passage switching plate 26 is in the solid line position.

SW5 is a pulse disk 35 fixed to one end of a shaft 34 of a conveying roller 30 driven by a motor M and having slits of a predetermined pitch as shown in the third figure. There is a photodetection switcher consisting of each light receiving element, and as the disk 35 rotates, it generates a pulse signal with a pitch corresponding to the drive speed, that is, the conveyance speed. ), but since IC5 is cleared in its initial state, it does not accept the pulse signal.

Switch SW1 has two contacts a and b, and when contact a opens, a clock signal is generated. When this signal is supplied to the CP terminal of D-flip-flop IC4A, I
C4A glue output is inverted from XXH// to St L",
As a result, the L terminal of the BCD down counter IC2 also becomes SS L //, and after the L terminal of and becomes 1L, a clock signal is delayed by the timer circuit T1 and supplied to the CP terminal via the buffer IC8. The signal causes the BCD down counter IC2 to count down, and the number of copies set by the switch SW4 reaches 1.
The value is subtracted and displayed by the display element LED1.

D-Flip-flop I C4A glue output' is ts L
By becoming p, the 7-stage pinary counter I
The CP terminal of C5 takes in the pulse signal from the photodetection switch SW5. When this Noculus signal reaches the 128th digit, the Q7 output of IC5 becomes SS L at this count.
// to SS H//, and the 128th digit of this pulse signal is set to correspond to the distance of the document A from the switch SWI to just before it reaches the photodetection switch SW2.

When the Q7 output of the 7-stage binary up counter CI5 becomes %H//, d of the D-7 flip-flop IC4H is inverted to 1L", and the R8-flip-flop IC6
The CL terminal of is also inverted to SSL //.

On the other hand, when the contact of the switch SW1 is closed, the paper feed solenoid SL1 is turned on, the paper feed roller 4 rotates, and the photosensitive paper P is fed.

Photodetection switches SW2 and SW3 are connected in series, and when both switches are closed, R8-flip-flop I
The PR terminal of C6 is inverted to (S L /l), the output of inverter IC7 becomes 1H", and the Q output of IC6 becomes S
When maintaining S H//, Nantes Gate IC
Since the input terminals of 9 are SS H// and 1H, its output becomes XXL, which causes the timer circuit--10
- During the timer time of T2, the output of the inverter CIO is high.
〃, transistor TRI turns on and solenoid S
L2 is activated, and the passage switching plate 26 is switched to the position shown by the broken line.

Here, the operating condition of solenoid SL2 is only when the photodetection switches SW2, SW3 are closed after the pulse signal is counted up at the 128th point, that is, R
8-Only when the CL terminal of flip-flop IC6 goes to %L/I before the PR terminal, the Q output of IC6 goes to %L
The signal changes from # to 1H, and it is decided to operate solenoid SL2.

Also, when contact a of switch SWI is opened a number of times equal to the set number of copies, the BCD down counter (IC2)
outputs -1" to %0" by counting down.

As a result, all input terminals of IC3 (NOR game) are set to low.
〃, and its output becomes %H//, so D-7
The replenisher IC4A is cleared and the Q output of the IC4A becomes high, and the BCDP counter IC2 takes in the BCD code set by the switch SW4 and displays the initially set number of copies on the display element LED1.

Next, the operation of continuous copying in the copying machine having the above configuration will be explained.

Figure 4 shows a time chart when, in the initial state of Figure 2, the number of copies is set to 9, original A is continuously copied, and at the end of the copying, original B is continuously inserted and copied. It is something.

First, switch SWI is turned on by inserting document A.
The output of the D-flip-flop IC4A becomes low, and the CP terminal of the 7-stage binary counter IC5 takes in the pulse signal from the photodetection switch SW5 and starts pulse counting. At the same time, photosensitive paper P is fed.

On the other hand, the BCD down count IC2 counts down, the number of copies is subtracted by 1, and the value is displayed on the LED element 1.

The original A and the photosensitive paper P have their leading edges aligned, pass through the exposure section E, and are separated by the separation mechanism section S, after which they are each moved to a photodetection switch SW2. It will reach SW3, but a little before that, the pulse signal will reach the 128th digit and count up, so the 7-stage binary up counter C
The Q7 output of I5 becomes % HI/, which causes R'S
-The CL terminal of flip-flop IC6 is %L〃,Q
The output becomes l'H'.

After that, when the document A hits the photodetection switch SW2 and then the photosensitive paper P hits the photodetection switch SW3, as shown at timing T1, R8-flip-flop IC6
The PR terminal becomes qL〃, and al becomes -L before cl.
〃, so %b is 'H#, inverter I
The output d of C7 becomes % L //, the output e1 of IC9 becomes % L //, the solenoid SL2 is turned on, and the original A is guided to the repeat path by the path switching plate 26.

When both switches SW2.8W3 are turned off, PR of IC6
The terminal becomes 1H〃 and returns to the - period state.

'Every time document A turns on switch SW1, a□~e1
The same control as above is repeated, and when the switch SWI is turned on for the 9th time, the BCD down counter IC2 becomes '1'.
"OI is output from ", the q output of D-flip float IC4A becomes 1H, IC2 outputs power 9, and element LED 1 displays -9.On the other hand, 7
The Q7 output of the stage binary up-count IC5 is ')I#, the CL terminal of the R8-flip-flop IC6 is %H#, and the Q output is %LIl.

After document A passes switch SWI, insert document B.
Reset switch SW1 is turned on by document B, and IC4A is turned on.
The Q output of the IC 5 becomes low, and the cp terminal of IC5 starts counting pulses. Before the 128th count-up, switch SW2. When SW3 is turned on for document A and photosensitive paper P, as shown at timing T, a becomes "'H" and c
Since l is 1L, b, it, 'L', and d,
The force PH becomes H, the SL2 remains off, the path switching plate 26 does not operate, and the document A is discharged onto the tray 30.

The pulse signal due to 11MB counts up as shown at timing T3, and then the original B and the photosensitive paper P
When the switch SW2.8W3 is turned on, at timing T, the document B is moved to the path switching plate 2i.
will guide you to the repeat passage.

14 - In this way, the original A and the photosensitive paper P cause the switch SW2.
After SW3 closes or passes through and opens, the pulse from switch SW5 is counted up. After this, switch SW2.8W3 is closed, solenoid SL2 is turned on, and passage switching plate 26 is turned on. Only original B and photosensitive paper P satisfy the conditions for activation.

The above is a case where the present invention is applied to a contact transmission type copying machine, but it can be similarly applied to a reflection type copying machine equipped with a repeat mechanism for repeatedly using a document. Note that in this case, since the separation mechanism section is not necessary, the control is performed by the detection means of the document ejection path.

Effects The present invention provides means for starting counting of a series of pulse signals generated at a pitch synchronized with the conveyance speed when the detection means on the document insertion path enters the detection state in a copying machine equipped with a repeat mechanism. , means for enabling the repeater 15-IC7, ICl0 . . . Since the present invention is a document conveyance control device, it is possible to shorten the feeding interval between the document for which continuous copying has been completed and the document to be continuously copied, and it is possible to improve the efficiency of copying operations during continuous copying.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a schematic configuration of a diazo copying machine to which the present invention is applied, FIG. 2 is an electric circuit diagram thereof, FIG. 3 is a diagram showing a specific example of a pulse generating means, and FIG. It is a time chart figure. 3... Original insertion passage, 24... Original discharge passage, 26
... Passage switching board, 27... Repeat passage, 34...
・Transport roller shaft, 35...Pulse disk, SWI...
Original detection switch, SW2. SW3. SW5...
Light detection switch, SW4... Copy number setting switch,
SL2...Solenoid, IC2...BCD down counter, IC4A, IC4B...D flip-flop, IC5...7 stage binary up counter,
IC6...R8-Flip-flop, 16- Applicant Minolta Camera Co., Ltd.-17-

Claims (1)

[Claims] 10. When continuous copying is set, the path switching means is set to feed the original into the repeat path, and one sheet of the original is sent to the exposure section repeatedly for a set number of copies. The first one placed in the aisle
When the document detecting means, the second document detecting means disposed in the document discharge path, and the first document detecting means are in the detection state, a series of pulse signals generated at a pitch synchronized with the conveying speed is counted. and means for enabling a setting operation of the passage switching means to the repeat passage side when the second document detection means enters the detection state after the count reaches a predetermined number. Original transport control device.