JPS6259308B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a copying apparatus that automatically supplies a document to an exposure surface and copies the document.

[Prior Art] Conventionally, it has been common for copying machines to change originals manually to make copies. Therefore, it often took a considerable amount of time and effort to make large quantities of copies.

In addition, there was a method in which copies of different originals were successively made by exposing and scanning thin originals while passing them one after another, but in this case it was not possible to make multiple copies from the same original.

[Problems to be Solved by the Invention] Therefore, there is a device that stops feeding the document and copies it, but in this type of device, after copying is completed, the exposed document is ejected, and then the next document is printed. When the document was being fed, it took time to replace the document, and it was delayed to start copying the next document.

[Means for Solving the Problems] The present invention promptly replaces originals and also eliminates the inconvenience caused by feeding the next original without waiting for the ejection of the exposed original to be completed. be.

That is, the document mounting table 14, the document storage section (166 in FIG. 3) capable of storing a plurality of documents, and the separating means (193, 19 in FIG. 3) for separating one of the plurality of documents.
5, 196), a means (130, 132 in FIG. 3) for feeding the original separated by the separating means onto the original document mounting table, and a means for feeding the original separated by the separating means onto the original placing table (130, 132 in FIG. 3); a document conveyance stopping means (43, FIG. 5) for conveying and stopping the document, exposure scanning means 15, 16 for exposing and scanning the document stopped on the placing table, and from the document feeding means to the document conveyance stopping means. a document detecting means (124, 125 in FIG. 3) provided in the feeding path for detecting the document;
a first timer (Q10 in FIG. 10) that outputs a signal indicating the elapse of time required for the leading edge of the document separated by the separation means to reach the document detection means; and a timer timer of the first timer. (1st
If the document detecting means does not detect the document even after the period T1 in FIG. 1) has elapsed, the jam detecting means (Q1 in FIG.
7), and the document conveyance stopping means includes a common belt means (see FIG. 274) and a second timer (Q56 in FIG. 1) for controlling the operation of the common belt means, and the timer time of the second timer means (T4 in FIG. 11) is determined when the exposed original is placed on the above-mentioned table. The timer of the first timer means should be longer than the time required for the document to be ejected from the original and sufficient time for the next document to reach the stop position on the placement table, and the timer time of the first timer means should be longer than the timer time of the second timer means. The object of the present invention is to provide a copying machine in which the jam detection means detects a document feeding jam in a short period of time before the belt means stops.

[Function] As a result, in a type in which the fed original is stopped and exposed and scanned, the exposed original can be quickly replaced with the next original, and the feeding jam of the original can be removed before the belt means stops. Since this function detects copy errors, there is no delay in the start of copying, and the effect of speeding up original replacement can be fully utilized.Even if a jam occurs, it prevents copy mistakes and minimizes damage to originals. be.

[Example] Examples will be described below with reference to the drawings.

FIG. 1 is a sectional view of a copying apparatus to which the present invention is applied.

The surface of the drum 11 is made of a three-layer photoreceptor using a CdS photoconductor, is rotatably supported on a shaft 12, and starts rotating in the direction of an arrow 13 in response to a copy command.

When the drum 11 rotates to a stable position, the document placed on the document table glass 14 is illuminated by an illumination lamp 16 that is integrated with the first scanning mirror 15, and the reflected light is used for the first scanning. It is scanned by mirror 15 and second scanning mirror 17. By moving the first scanning mirror 15 and the second scanning mirror 17 at a speed ratio of 1:1/2, the original is scanned while the optical path length in front of the lens 18 is always kept constant.

The above reflected light image shows the lens 18 and the third mirror 19.
After passing through the fourth mirror 20, the exposure section 21
Then, an image is formed on the drum 11.

After the drum 11 is charged (for example, +) by a primary charger 22, an image irradiated by an illumination lamp 16 is slit-exposed in the exposure section 21.

At the same time, AC or primary charge removal with a polarity opposite to that of the primary charge (for example, -) is performed by a charge remover 23, and then a high-contrast electrostatic latent image is formed on the drum 11 by full-surface exposure using a full-face exposure lamp 24.
The electrostatic latent image on the photosensitive drum 11 is then transferred to a developing device 25.
It is visualized as a toner image.

The transfer paper 27-1 or 27-2 in the cassette 26-1 or 26-2 is transferred to the paper feed roller 28.
-1 or 28-2 into the machine, the first register roller 29-1 or 29-2 takes approximate timing, and the second register roller 10
The photosensitive drum 11 is sent out in the direction of the photosensitive drum 11 with accurate timing.

Next, while the transfer paper 27 passes between the transfer charger 9 and the drum 11, the toner image on the drum 11 is transferred onto the transfer paper.

After the transfer is completed, the transfer paper is guided to the conveyor belt 8, and then to the pair of fixing rollers 7-1 and 7-2.
The image is fixed by applying pressure and heating, and then discharged onto the tray 6.

After the transfer, the surface of the drum 11 is cleaned by a cleaning device 5 composed of an elastic blade, and the process proceeds to the next cycle. 40 is an original automatic feeding device; 41 is a sheet bucket section for storing the original; 42 is a feeder section for separating and feeding the original; and 43 is a setter section for setting the original on the exposure surface 44. . Figure 2 is the first
The operation panel 30 of the copying machine shown in the figure is shown in detail. Reference numeral 31 indicates a dial for setting the number of copies, and reference numeral 32 indicates an ordinary copying unit for commanding the number of copies set by the dial 31. Buttons, 33 is a normal copy button that commands one copy irrespective of the number of copies set on the dial 31, 50 is a button for automatic feeding from the automatic feeder, and 51 is a manual button from the automatic feeder. 34 is a stop button for instructing to stop copying, 35 is a density adjustment dial for adjusting the density of the image formed on the transfer paper, and 36 is a button on the upper row in FIG. 1A. The button 37 instructs to feed out the transfer paper from the installed cassette 26-1, and the button 37 instructs to feed out the transfer paper from the cassette 26-2 installed in the lower row in FIG. 1A. button 36 or 37
The size of the transfer paper stored in the cassette selected in is displayed on the display section 38.

Next, the document supply device of the present invention will be explained.
This device consists of a feeder section, a setter section, and a stacker section. First, the feeder section will be explained. FIG. 3 is a sectional view of the feeder section. The document is placed on a guide angle 168 provided at the top of the sheet bucket 166 to allow width adjustment.
To adjust the width, loosen the slide knob 171.
It can be carried out. By doing so, when the document presses the actuator 117a of the micro switch 117, it is known that the document is in the seat bucket 166. Make sure actuator 1
A weight 111 is added to push 17a. The weight 111 is pivotally supported by the adjustment stay 104 via the weight arm 110, and is configured to be rotatable. ADF from the main body,
In response to the AUTO copy signal and the set number of copy end signals, the document is fed forward by the sheet roll 195 press-fitted into the sheet roll wheel 113 fixedly attached to the sheet roll shaft 112.
Feed roll 196 to the front, to the left in this figure.
and Asia Stroll 193. In this embodiment, the adjuster roll 193 is fixed and does not rotate.
The gap with the feed roll 196 is adjusted to avoid sending more than one document at a time. Adjustment roll 193 is adjustment angle 1
01 is pivotally supported by an adjuster roll shaft 102, and the adjuster angle 101 is rotatably supported by an adjuster stay 104. The adjustment spring 114 suspends the adjustment angle 101 by an adjustment spring hook 107, and can be adjusted by an adjustment dial 106. A click spring 109 jumps into a groove provided on the circumference of the adjust dial, thereby making it possible to fix the adjust dial and adjust it in steps. Only one document is fed by the feed roll 196 and the adjuster roll 193 and is ejected through a roller press-fitted into the ejection drive shaft 130 and a roller press-fitted into the ejection driven shaft 132. At this time, the light emitting element block 125 and the light receiving element block 124 detect the passing of the paper by blocking the transmitted light. Therefore, if separation is not performed within a certain period of time, an LED lamp 108 pivotally attached to the LED angle 108 will light up to indicate a jam. In addition, 12
2 and 123 are support members 125 and 124, respectively.

To explain the horizontal adjustment, rail 12
8, the adjustment range is regulated by a long groove provided in the connecting member 148, and the slide screw 150 and slide spacer 11
A connecting member is sandwiched between 8 and 8 to form a guide.

Next, the driving relationship will be explained based on FIG. 4.

When a plunger 136a fixed to a plunger angle ₁₃₆ is turned off, a gear 1291 fixed to a clutch drive shaft 129 driven by a motor (M ₁ not shown) is connected to a trigger pivotally supported by a trigger stud 138. Arm 13
7 is rotated clockwise by the solenoid ring 140, and the clutch plate 133 is rotated counterclockwise by the clutch gear stud 134 swaged thereon.
The clutch gear 191 pivotally connected to the gear 129a
meshes with This causes the clutch drive gear to rotate, causing the feed roll shaft to rotate. On the other hand, the sheet roll shaft 112 is stretched between the feed roll shaft and a timing belt (not shown). Conversely, when the plunger is turned on at the next signal, the trigger arm 137 rotates counterclockwise, causing the clutch plate 133 to rotate clockwise and stop rotating due to the flywheel effect. Clutch gear 1 is connected to a stopper roll 194 provided on the brake shaft 160 for the purpose.
I hit 91 and it stopped rotating. Note that in terms of service life, the shaft 160 and the roll 194 must be fitted in a loose fit. Next, the setter section will be explained. FIG. 5 is a sectional view thereof. The document separated and fed from the feeder section is fed between the overlay 264 and the belt 274 and sent to the left. A pulley drive shaft 227 driven by a motor (M ₂ not shown) rotates clockwise and drives a belt 274 by a crown-shaped belt pulley 224 fixedly attached to the shaft 227 . A gap is provided between the belt 274 and the overlay 264 when the motor is stopped, and the belt 274
By using the slack side of the belt 274, the belt 274 is brought into pressure contact with the overlay 264, thereby ensuring reliable feeding. Since there is some resistance to restarting paper once it has been stopped, a weight roll 219 is pivotally mounted on a weight holder 218 that is rotatably supported by a weight shaft 222.
This ensures reliable delivery. For more stable feeding, it is sufficient to provide several pressure rollers, but even with this configuration, the desired purpose can be sufficiently achieved. The document sent over the overlay 264 is stopped at a stopper 204 attached to the tip of the stopper 202. This stopper is composed of several pieces in order to obtain parallelism, and the timing is longer than the maximum time for the paper to arrive, and its length is used to correct the skew during conveyance. There is. Here,
The document has been set to be copied in the specified position and the copying cycle has begun.In order to increase the copying speed, the transfer paper is fed from the cassette at the same time as the document is started from the feeder section. It is being done. When the original does not arrive from the feeder section to the stopper 202 (reflective sensor 208) in the setter section within the required time, the reflective jam lamp 209b is turned on. Stoppa 2
To further explain 02, when a copy completion signal is received from the copying machine main body, the stopper shaft 212 is rotated clockwise by a plunger (not shown), and the stopper push plate fixed to this shaft 212 is rotated. Stop link 2 by 211
07 downward, the stopper 2 rotates around the stopper pin 205 fixed to the stopper mounting angle 201 fixed to the stopper stay 210.
Rotate 02 clockwise and press stopper 20.
4 is released from the overlay 264, the document is ejected, and guided diagonally upward by the guide of the overlay 264, and the crown pulley 224b and tension pulley shaft 248 fixed to the pulley shaft 226
The paper is sandwiched between the tension roller and the tension roller press-fitted into the stacker to ensure that the paper is ejected onto the stacker. The above-mentioned reflective sensor 208 checks whether or not this ejection has been performed reliably, and if the ejection is not being performed, the jam lamp 209b is turned on. In the event of a jam, the document must be placed in a predetermined position, and for this purpose the setter section can be opened and closed. A setter section is disposed on a shaft parallel to the document transport path, and rotates around this shaft to create a mode different from the copy mode. As a result, three types of jams can be solved by opening and closing the setter section: jams caused by separation errors at the feeder section, jams caused by delays in arriving at the setter section, and jams due to improper ejection. All you have to do is give a start signal. At this time, the reset button 234 is pressed to input a signal indicating that the jamming operation has been completed. In addition, when the setter section is opened, a micro switch that is turned off when the setter section is contacted is turned on to stop the rotation of the drum, belt, and sheet roller motors to ensure safety.

Further, the number of fed documents is counted at the time of ejection and displayed on a counter 209a.

Next, overlay 264 will be explained. A perspective view is shown in FIG. Next, a sectional view is shown in FIG. The overlay film 264b is attached to the overlay 264a and the overlay angle 26 is
5, a rotation support shaft is provided in the vicinity of the rotation support shaft of the setter portion to make it rotatable. Overlay film 264b is made of a transparent material, and overlay 264a is used to hold it. If the overlay is made of a flexible member, it can also be used as a cover for the document table, allowing general copying. Furthermore, if necessary fixed information is inserted by printing on the underside of the overlay film 264b, it becomes an original overlay. Additionally, unnecessary information can be removed using a white mask. Depending on the exposure source, the white mask may be placed on the top surface of the overlay film 264b.
Silk screen printing increases the thickness of the print.
This can be done with a thickness of 0.025 mm or less.

Next, the stacker will be explained. FIG. 8 is a perspective view, and FIG. 9 is a sectional view thereof. When using the document feeding device, it is used in state A, and during general copying, it is made to be copied in state B. Depending on the state of the stacker, the state is detected by a circuit element such as a micro switch. By using
It is possible to switch between the ADF circuit and the normal copy circuit. 301 is the side, 302 is the tray, 3
04 is a fixed base, and 303a and 303b are tray rotation shafts provided on the tray. The original is stored in the direction of the white arrow.

Next, the operation will be explained based on an implementation circuit diagram and a signal timing diagram. In the figure, Q ₁ and Q ₂ are the 124 phototransistors provided in the feeder section of Figure 3.
When the transistors driven by PHA ₁ and PHB ₁ detect the passage of an original, the collector potential becomes a high level "H" (hereinafter referred to as "H"). That is, PHA1 and PHB1, which are the document 11 detecting means in the present invention, are provided on the feeding path from the document feeding means to the document conveyance stopping means. _K1 is a relay that generates a signal to start document feeding (referred to as the ADF signal), when the copy button (ADF button) on the copier is pressed or when the copier completes copying the number of sheets specified by the dial 31. Excited in pulses. Input signals BSA and BSB are provided by micro switch 1 installed in the sheet bucket section to detect the presence or absence of originals.
The signal from 17, ₁₁₇₁ is H if there is a document, and is low level L (hereinafter referred to as L) if there is no document. Q
30, Q31 are phototransistors PHA2, PHB of the reflective paper detector 208 provided in the setter section.
When the arrival of a document is detected in the transistor driven by 2, the collector potential becomes L. _K2 is a relay that starts the process of the copying machine, and starts exposure scanning of the original after a predetermined time (the time when the original comes to rest in the setter section) after being energized. Reset is a signal for resetting this circuit by turning on the power to the device or by pressing the STOP key, and AUTO is a button signal for automatically feeding ten original sheets and making copies. K ₆ and K ₅ are relays for driving belt motor M ₂ by their excitation,
ClA and ClB are plungers for driving the feed rollers (two in parallel) that separate the originals of the sheet bucket section in the directions of the arrows, and SL is a solenoid for lifting the stop pawl 202 of the setter section.

Explain the operation. Turn on the copy button
ADF signal is generated and activates relay _K1 . Therefore, one of the inputs of Q4 becomes H, and its output becomes H.
becomes. Note that Q5 connected to the input of Q4 is a CMOS buffer for preventing chattering of the contact of _K1 . Q8 and Q9 connected to the output of Q4 are D
It is a type edge trigger flip-flop.
Due to the high output of Q4, the CLOCK inputs of Q8 and Q9 become high. At this time, since there are documents in both A and B of the sheet bucket section, the input signals BSA and BSB are both at H, so the D input of Q8 is at H. accordingly
When the CLOCK input rises from L to H, that is,
When the ADF signal is input, the outputs Q of Q8 and Q9 both become H and both become L. Further, drivers Q13 and Q14 are connected to the outputs of Q8 and Q9, and the outputs L of both turn off plungers ClA and ClB that control sending out of the original from the sheet bucket section. As a result, the feed roller is reversed and one original sheet is fed out from the sheet bucket section.

Next, when the document reaches the document detector 124 in the feeder section, the collectors of phototransistors Q1 and Q2 become H, so the RESET inputs of Q8 and Q9 both become H, and therefore the outputs of Q8 and Q9 both become H. Plunger ClA through Q13 and Q14,
Turn on ClB, stop driving the field roller, and enter the standby state. Note that at this time, the original is being conveyed while being held between rollers 130 and 132 that are constantly rotating, and is therefore sent to the feeder section. Note that ADF
When a signal is input and ClA and ClB are turned off,
Since the input of OR gate Q55 connected to the outputs of drivers Q13 and Q14 becomes H, a one-shot multivibrator (hereinafter referred to as one-shot) is activated.
The input of Q56 becomes H. Therefore, the output turns on the transistor Q57, which excites the relay K6, the contact of K6 excites the relay K5, and the contact of K5 turns on the motor M which drives the conveyance belt of the setter section, which is the document conveyance stop means of the present invention. ₂ for a predetermined period of time. Therefore, the original sent from the feeder section is sent to the exposure position by the conveyor belt of the setter section, and stopped at the original stopper 204 provided at the tip of the exposure position. Note that the one-shot time in Q56 is set to a time sufficient for the document to reach the stop 204. The document that has come into contact with the stopper 204 does not move because the belt simply slips. Also, when the ADF signal comes out, OR gate Q
One shot Q10 is triggered by the output of 4, and Q
The output of driver Q15 connected to the output of Q10 is turned on. And stopper control solenoid 5
L is energized, the stopper is lifted, and the previously copied document that has been placed at the stopper is discharged by the operating belt. That is, the setter section, which is the document conveyance stopping means, has a common belt means for ejecting the exposed original from the document placing table and conveying the next document onto the placing table, and controls the operation of this belt means. The timer time T4 of the one-shot Q56, which is the second timer, is longer than the time required for the exposed original to be ejected from the mounting table, and is sufficient for the next original to reach the stop position of the mounting table. Here, the output time of the one-shot Q10 is set to a time shorter than the time required for the document sent out from the bucket to arrive by the ADF signal. Therefore, when the original is reached, the output of the one shot Q10 is L, so the stopper control solenoid is de-energized and the stopper is lowered. In short, the time constant of the one-shot circuit Q10 is longer than the time taken to send out the copied original at the stopper section, and shorter than the time it takes for the uncopied original sent out from the bucket section to reach the stopper section, and the time constant is longer than the time taken to send out the copied original at the stopper section. Set to the timing of the check signal for detection. After the document is set at the exposure position by the stopper, the copying machine main body starts exposure scanning.

Note that after the copy command signal START is input to the main body of the copying machine by relay K2, the photosensitive drum is rotated once to start exposure in order to obtain a stable image.
During this one rotation, the photosensitive drum is neutralized with a lamp and AC charger, and cleaned with a blade. It should be noted that the primary charger is turned on before exposure in order to remove the charge caused by the primary charger from the exposed image. In this example, the time Ta required for this rotation and the time from turning on relay K2 until the original is set at the exposure position
A copy start signal is sent to the copying machine so that Tb and Ta>Tb. Here, when the input of the OR gate Q6 becomes H when the original reaches the phototransistors PHA1 and PHB1 of the feeder section, the output of the driver Q16 is turned on through the OR gate Q7, the relay K2 is energized, and a copy start signal is sent to the copying machine main body. is out. this signal
START is held until a predetermined number of copies are completed. A predetermined number of copies are made by scanning continuously each time the optical system returns to its original position.

When the copying machine main body finishes copying the designated number of sheets from the same original in the setter section in the manner described above, it sends an ADF signal to the document supply device and re-energizes relay _K1 . This ADF signal is generated when transfer to the last designated number of transfer sheets is completed. The output of gate Q ₄ becomes H, and the roller is driven again to send the document from the sheet bucket unit to the exposure unit, and when PHA ₁ detects the feeding, a copy start instruction is issued to the copying unit, and the copying is completed as described above. Eject the original that was created.

When the document on the A side of the sheet bucket section is gone, the micro switch BSWA returns, the input signal BSA becomes L, and the input D of the flip-flop _Q8 becomes L. Since the output of flip-flop _Q8 remains high, the plunger ClA remains on and does not feed the document. If there is a document on the B side of the sheet bucket section, the input D of the flip-flop _Q9 is H, so the output of the flip-flop _Q9 becomes L, turning off the plunger ClB, activating the rollers, and feeding the document, and the above-mentioned series of operations is carried out. Continue. Also, A, B
When the documents on both sides are exhausted, the flip-flop
The outputs of Q ₈ and Q ₉ are both H, and no original feeding operation is performed. In the feeder section, PHA ₁ and PHB ₁ do not detect the original, so relay K ₂ does not operate, and therefore does not issue a copy start command to the copying machine itself, so the drum front rotation and exposure for copying are interrupted. The process will terminate.

Next, document jam detection will be explained. now
When the ADF start signal is input, even though there is a document in the sheet bucket section, the document detection element PHA ₁ or
The case where the original does not reach PHB ₁ , that is, the original feeding jam in the present invention will be described. As described above, when the ADF signal is input, the one shot _Q10 operates and the output of _Q10 changes from H to L, and returns from L to H after a certain period of time. If the output Q of Q ₈ or Q ₉ is H when the change occurs, Q ₁₇ or Q ₁₈
The D input signal of _Q17 or _Q18 also becomes H.
becomes. At this time, the H of the output Q of Q ₈ or Q ₉ is
If no signal enters the Reset input of Q ₈ or Q ₉ before this time, it means that the original has not reached the original detecting element in the feeder section. This Q ₁₇ or
Depending on the Q output of _Q18 , transistor _Q22 or
The emitter voltage of Q ₂₃ becomes higher. Thereby, the light emitting diode PLJAMA1 or
Flow current to PLJAMB1 and display jam. Also, the outputs of flip-flops _Q17 and ₁₈ are connected to the input of _Q48 .
Then turn on driver Q ₅₀ and energize relay K ₃ . The contacts of relay K ₃ energize relay K ₄ , which cuts off the power to motors M ₁ and M ₂ and immediately stops their operation, and the other contacts of K _{3 energize relay K 4 ,} which immediately stops the operation of motors M 1 and M 2. Issues a copy stop signal to turn off the high-voltage power supply of the charger. Looking at this on the time chart, the fall of signal PHA ₁ or PHB ₁ , that is, the arrival of the original, is one shot Q _10.
At the falling edge of the signal STSOL is not present before. The time constant of one shot Q ₁₀ is from the rise of the ADF signal to
Set longer than the time required for the original to be successfully sent to PHA ₁ or PHB ₁ . That is, the one shot Q10, which is the first timer in the present invention, outputs a signal indicating the elapse of the time T1 required for the leading edge of the document separated by the separation means to reach the phototransistors PHA1 and PHB1, which are the document detection means. The flip-flop Q17, which is a jam detecting means, determines that there is a feeding jam if the document detecting means does not detect a document even after T1 has elapsed, and stops conveying the document. Further, as described above, the timer time T1 of Q10 is shorter than the timer time T4 of the second timer Q56.

Next, jam detection when a document fed from the feeder section does not reach the exposure position of the setter section will be described. When the original arrives at the original detection position in the feeder section, the signal PHA ₁ or PHB ₁ becomes H, and one shot Q ₁₁ or Q ₁₂ is triggered. Q ₂₀ or Q ₂₁ connected to the output of one shot Q ₁₁ or Q ₁₂ is a NOR circuit, and one input is connected to the one shot output Q, and the other input is connected to the output of the one shot circuit through an RC delay circuit, so it is one shot. After the circuit has finished operating, the output of Q ₂₀ or Q ₂₁ emits a positive pulse P ₂ . Note that this output pulse _P2 is
This is set to occur after the document has been normally fed and has arrived at the document detection position of the setter section, and is used to check whether the document has arrived at the setter section.

When the document detecting element PHA ₂ or PHB ₂ in the setter section detects a document, the transistor Q ₃₀ or Q ₃₁ is turned off and triggers the one-shot circuit of Q ₃₂ or Q ₃₃ . Note that the output of Q ₃₂ or Q ₃₃ is the pulse P ₂
It is also used as an input to the AND circuit of _Q24 or _Q27 . _{Q32 or}
Since the output of Q ₃₃ is H, the inputs of AND circuit Q ₂₄ or Q ₂₇ are both H, and the output is passed through the OR circuit of Q ₂₅ or Q ₂₈ .
Apply H to the CLOCK input of Q ₄₀ or Q ₄₁ . Q ₄₀ and Q ₄₁ are D-type edge trigger flip-flop circuits, and their inputs D are connected to H level, so the output Q becomes H level, and is connected to the emitter of Q ₄₄ or Q ₄₅ via a resistor. connected issuing diode
Apply current to PLJAMA ₂ or PLJAMB ₂ and display jam. In addition, the outputs Q of flip-flops Q ₄₀ and Q ₄₁ are also connected to the input of OR circuit Q ₄₈ , so they drive driver Q ₅₀ , which in turn drives relay K ₃ , and the contact of K ₃ drives relay K ₄ . The contact of relay K ₄ cuts off the drive of motors M ₁ and M ₂ and stops the document feeding device.

Next, detection of copy paper discharge jam from the setter section will be described. One of the inputs of AND circuit _Q19 is
Output Q of one shot _Q10 through CR delay element
Since the other input of _Q19 is connected to the output of _Q10 , _Q19 outputs a positive pulse _P1 after the output of one shot _Q10 is completed. The output of the one-shot _Q10 is a signal that controls the raising and lowering of the document stop in the setter section, but the timing when the stop is lowered, that is, the _P1 pulse at the end of the one-shot of _Q10 , is used to check the output jam of the copy paper. It's a pulse. This check pulse P ₁ is
Connect to one input of AND circuit Q ₂₆ , Q ₂₉ , and connect Q ₂₆ ,
The other input of _Q29 is connected to the outputs Q of flip-flops _Q32 and _Q33 for detecting arrival at the setter section. Therefore, when the original is in the setter section without being ejected, the outputs Q of the flip-flops Q ₃₂ and Q ₃₃ are H, so the inputs of the gate Q ₂₆ or Q ₂₉ are both H, and the output of the gate Q ₂₆ or Q ₂₉ is high. The output becomes H. Sideways
The output Q of Q ₄₀ or Q ₄₁ becomes H, and as in the case of the arriving jam, the jam is displayed and the motor is activated.
The driving of M ₁ and M ₂ is cut off, and the document feeding device is stopped. Note that the light emitting diode is the irradiation light source for the document detection phototransistors PHA2 and PHB2 in the setter section.
LEDA ₂ and B ₂ are operated by an oscillator composed of drivers Q ₅₁ to Q ₅₄ and capacitor C ₁ . This lights up the issuing diode intermittently, allowing it to operate with a larger current than instantaneous. Therefore, malfunctions due to noise can be prevented. Therefore flip-flop
Since the trigger inputs of Q ₃₂ and Q ₃₃ are continuously input in the form of pulses when a document is detected, the output Q remains at H level.

Next, count the number of copies of the original by using the counter CNTA.
I will talk about the counting method using B. The function of adding 1 to the counter is the R-S flip-flop.
This is done using drivers Q ₄₆ and Q ₄₇ connected to the outputs of Q ₄₂ and Q ₄₃ . R-S flip-flop Q ₄₂ , Q ₄₃
The setting is performed under the AND condition of the document presence detection in the setter section and the above-mentioned _P2 pulse generation, and the reset is performed under the AND condition of the document ejection signal from the setter section and the _P1 pulse generation. . Therefore, if the document is jammed and does not reach the exposure section, the number of copies is not counted. On the circuit diagram
Q ₃₄ and Q ₃₇ are AND circuits for setting, and one of their inputs is the output of gates Q ₂₀ and Q ₂₁ (P ₂ pulse generation output), and the other input is the flip-flop Q ₃₂ ,
Connected to output Q of _Q33 . Further, Q ₃₅ and Q ₃₈ are reset AND circuits, and one of their inputs is connected to the output of gate Q ₁₉ ( _P1 pulse generation output), and the other input is connected to the outputs of flip-flops Q ₃₂ and Q ₃₃ .

Thick originals (books, etc.) without using an automatic feeder
When making a copy by placing the image on the exposure surface, or in the case of the above-mentioned overlay copy, turn on the normal copy button instead of the ADF button. By turning on the copy button, the input signal MAN shown in FIG. 10 is input to the OR gate _Q7 . Then, as mentioned above, turn on relay _K2 and connect it to the copier main body.
Outputs the START signal, cleans the drum once, and then starts the original exposure scan. Signal MAN is sustained for some time by capacitor C. Incidentally, since the setter section is movable relative to the exposure surface as described above, a thick original can be placed on the exposure surface made of a transparent material. When copying thick originals or overlays, the MAN signal prohibits the circuit operation that turns off the motor when the setter section is opened, and the motor does not stop driving.

In addition, when copying with the input signal AUTO, the input signal
Unlike copying using ADF, the original is not fed after a predetermined number of copies have been made. Also signal
MAN is obtained by pressing the M and S buttons; S makes one copy, and M holds the START signal to make a predetermined number of copies.

Above, we have explained the combination of original detectors, plungers, indicators, etc. in rows A and B.
Regarding the column, it means that the original bucket section, feeder section, setter section, and stacker section are arranged in parallel so that originals from different processes can be stored, separated, fed, exposed, and discharged at the same time. These top views are schematically illustrated in FIG. As a result, for example, one
You can copy two A5 size originals onto A4 size transfer paper at the same time. In particular, when copying bank bills, etc., use a copying machine with a variable magnification function (for example, as shown in the specification of Japanese Patent Application No. 52-45418) to simultaneously reduce two bills to A5 size and copy them to A4 size. can do.

[Effects] As explained above, according to the present invention, the timer time of the first timer for detecting a document feeding jam is made shorter than the timer time of the second timer for driving the belt, and the belt stops. Since it detects document feed jams beforehand, it speeds up document replacement and does not delay the start of copying. Even if a jam occurs, it prevents copy errors and minimizes damage to documents. .

[Brief explanation of the drawing]

1 is a sectional view of the copying apparatus according to the present invention, FIG. 2 is a top view of the operation panel of the apparatus in FIG. 1, FIG. 3 is a sectional view of the feeding section of the automatic document feeding apparatus of FIG. The diagram shows the clutch operation diagram in Figure 3, and Figure 5.
The figure is a sectional view of the document setter section in FIG. 1, FIGS. 6 and 7 are drawings in which an overlay is used in the setter section, FIGS. 11 is a signal time chart of FIG. 10, and FIG. 12 is a top view of the automatic supply device of FIG. 1. In FIG. 1, 14 is an exposure surface glass;
41 is a document storage unit, 42 is a separation and feeding unit, and 43 is a setter unit.

Claims (1)

[Scope of Claims] 1. A document placement table; a document storage section capable of storing a plurality of documents; a separation means for separating one of the plurality of documents; and a document separated by the separation means on the document placement table; means for feeding the original upward; original transport stopping means for transporting the original fed by the feeding means to an exposure position and stopping the original; and exposure scanning means for exposing and scanning the original stopped on the placing table. and a document detecting means for detecting the document, which is provided in a feeding path from the feeding device to the document conveyance stopping device, and a leading edge of the document separated by the separating device reaches the document detecting device. a first timer that outputs a signal indicating the elapse of time required for the first timer to detect a document; a jam detecting means for stopping the feeding of the original, and the original transport stopping means ejects the exposed and scanned original from the original placing table and transports the next original onto the placing table. a common belt means and a second timer for controlling the operation of the common belt means, the timer of the second timer means being longer than the time required for the exposed original to be ejected from the table;
and the time is sufficient for the next document to reach the stop position on the placing table, and the timer time of the first timer means is set to be shorter than the timer time of the second timer means, and the jam detection means A copying machine characterized in that a document feeding jam is detected before the belt means stops.