KR950001537B1 - Automatically jam-removing method of automatic document feeder - Google Patents

Abstract

The method for releasing and resetting the jam state automatically if removed of the jamed manuscript includes the steps of: a) classifying the jams to the feeding, discharging, miss-feeding, and miss-discharging jam respectively and setting the corresponding flag after detecting the present jam state; and b) setting or clearing the jam flag after detecting the flag states of feeding and miss-discharging jams and the manuscript detected by a sensor(103).

Description

How to Automatically Release Jam in the Automatic Document Feeder

1 is a schematic external view of an automatic document feeder to which the present invention is applied.

FIG. 2 is a side perspective view of FIG.

3 is a block diagram of the hardware for controlling the automatic document feeder to which the present invention is applied.

4 is a flowchart of execution of a jam detection routine according to the present invention.

5 is a flowchart illustrating a jam processing routine according to the present invention.

6 is a flowchart illustrating a jam releasing routine according to the present invention.

* Explanation of symbols for main parts of the drawings

10: Urgent Support 20: Manuscript Guide

30: indicator 40: document discharge

50: exit document loading table

The present invention relates to a jam release method of an automatic document feeder (hereinafter simply referred to as " ADF "). In particular, when a jam occurs that does not require a separate operation such as lifting an ADF, the jam is generated. The present invention relates to a method for automatically releasing jams of the automatic document feeder which automatically cancels and resets the jam state when only the original is removed.

In general, the automatic document feeder (ADF) loads the copied originals discharged through the document support tray 10 and the document ejection port 40 with document guides 20 formed on both sides as shown in FIG. It is provided with a discharge document loading table 50 for, and may further include an indicator 30 for displaying whether or not the set of documents.

In addition, referring to FIG. 2 as an example of the automatic document feeder, the detailed configuration thereof is as follows.

As shown in the drawing, a typical automatic document feeder includes a document glass 10 having a document guide 20, a document presence sensor 66, a separation belt hook fixing roller 67, a spring 68, Including a separating belt 69, a separating roller 70, a separating belt hook rotating roller 71, a pickup roller driving belt 72, a resist roller 73, an idle gear 74 and a document standard detector 75 A paper feeding unit configured; A conveying unit including a conveying intermediate roller 77, a conveying belt 78, and a conveying driven roller 79; The conveying driven roller 79 and the discharge roller 80 is connected to the belt is composed of a discharge unit including an antistatic brush (not shown).

Looking at the operation of the automatic document feeder configured as described above, the document is set on the document glass 10, the presence or absence of the set of the document is detected by the document presence detection sensor (66).

The set originals are introduced into the paper feeding unit according to the copy start command, and the incoming originals are separated one by one by the separating belt 69 and the separating rollers 70 and are taken over by the paper feeding rollers 73.

At this time, the document is detected whether the paper is fed by the document standard detection sensor (75a), and the document passed through the document standard detection sensor (75a) is detected by the conveyance unit while the size of the document is detected in the document standard detector glass It is set on the document glass 82.

The document size detection in the document standard detector 75 is performed by the document standard detection sensor 75a, the optical sensor 75b, and the encoder 75c, and the document standard detection sensor 75a operates by the introduction of the document. The optical sensor 75b detects the number of revolutions of the encoder 75c from the time point to the time when the original standard detection sensor 75a ends the operation to calculate the specification of the fed document.

Thereafter, when the document is set on the glass platen 82 of the copying machine 83, a copying operation is performed, and when copying is completed, the document is conveyed by the conveying unit and discharged through the discharge unit, driving the conveying unit for discharging the original. The time is a control unit (not shown in the drawing) drives the conveyer to discharge the originals for a predetermined time proportional to the size of the originals detected by the document standard detector.

Here, the check of the predetermined time is performed by counting the rotational pulse of the encoder 75c provided by the document standard detector, and the specific operation and configuration of the automatic document feeder has already been described by the applicant of the present invention. Patent application No. 11420).

However, the automatic document feeder (ADF) often causes jams during use. In the conventional case, the jam was released only by lifting and lowering the ADF each time every ADF jam occurred.

In other words, the copier uses the ADF to lift or lift the ADF as a criterion for determining whether to release the jam, and the jam state of the ADF must be lifted from the ADF and the original must not be detected by the sensor that detects the jam. Can be released. Therefore, the jam state jammed in the ADF can be released only when the ADF is lifted and the original is not detected by the sensor which detected the jam.

Therefore, even if the jam can be removed without lifting the ADF (for example, when jammed with the paper almost discharged out of the output sensor), the jam cannot be released only by removing the paper. There was an inconvenience in using the ADF to lift it.

The present invention has been made in order to solve the above problems, and after the jam is generated, if there is a signal that the original is removed from the sensor detected the jam automatically releases the jam state and also sends a jam release signal to the copier side It is an object of the present invention to provide an automatic jam release method of an automatic document feeder which automatically resets jams.

In order to achieve the above object, the present invention includes a control means of an automatic document feeder connected to send and receive a control signal with the copier side control means, and the input end of the ADF control means, a document standard detection sensor, a document presence detection sensor, A discharge detection sensor, a lift detection sensor, a pickup roller position detection sensor, a mode selection switch, and an original standard adjustment switch are respectively connected, and an output terminal of the ADF control means is connected to a motor and a display means, respectively, and configured to operate according to the control. A jam releasing method of a document feeder, comprising: a first step of detecting jams generated during an operation by separating them into paper jams, paper jams, paper feed failures, and paper failures, and setting a flag assigned thereto; A second step of determining whether or not the document is set on the document glass through a document presence detection sensor and calling a jam releasing routine if the document exists; A third step of confirming whether or not an original is detected by the discharge sensor after performing the second step, performing and returning a jam signal to the copier, emitting a jam display LED, and setting a jam flag; A fourth step of setting or clearing a jam flag by checking whether a document is detected by the document standard detection sensor, a state of a paper feed and discharge jam jam flag, and a state of a jam flag; After performing the fourth step, check whether the paper feed and discharge failed jam flag and the jam flag are set, and if not set, return the light, and if it is set, emit the jam display LED, and transmit the jam signal to the copier. A fifth step; A sixth step of performing a jam releasing routine if an original is not detected by the document presence detection sensor after performing the fifth step; A seventh step of detecting whether or not an original is detected by the discharge sensor, and if detected, performing and returning a jam signal transmission to the copier side, emitting a LED for displaying a jam, and setting a jam plug and a discharge flag; After performing the seventh step, by checking whether the document is detected by the document standard detection sensor, the state of the paper feed and discharge jam jam flag and the state of the jam flag, and set or clear the jam flag and the paper feed jam jam flag; Step 8; And after performing the eighth step, check whether the paper feed and discharge failed jam flag and the jam flag are set, and if not, return them, if set, emit the jam display LED, and transmit the jam signal to the copier. It is characterized in that performed by the ninth step of returning.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings of FIGS. 3 to 6.

3 is a block diagram showing the hardware configuration for controlling the automatic document feeder to which the present invention is applied. In the drawing, 100 is an ADF CPU (Central Processing Unit), 200 is a copier CPU, 103 is a document standard detection sensor, and 105 is a document presence. Detection sensor, 106 is the discharge detection sensor, 107 is the lift detection sensor, 108 is the pickup roller position detection sensor, 109 is the mode selection switch, 110 is the motor, 112 is the display, 113 is the original standard control switch, respectively. .

As shown in the figure, the control circuit of the ADF for applying the present invention includes an ADF CPU 100 connected to exchange a control signal with the copier side CPU 200, and at the input end of the ADF CPU 100, Original standard detection sensor 103, original presence detection sensor 105, discharge detection sensor 106, lift detection sensor 107, pickup roller position detection sensor 108, mode selection switch 109 and original standard control switch Reference numeral 113 is connected, and the motor 110 and the display 112 are connected to the output terminal of the ADF CPU 100 so as to operate under the control thereof.

The document presence detection sensor 105 is for detecting whether the document is set on the document glass 10, and corresponds to the document presence detection sensor 66 of FIG. 2 mentioned above, and the document specification detection sensor 103. ) Is for detecting the size of the document to be fed, which corresponds to the original standard detection sensor 75a of FIG. 2 mentioned above, and the discharge detection sensor 106 is for detecting whether the copied document is placed. The lift detection sensor 107 is for detecting whether the ADF is lifted up, and the pickup roller position detection sensor 108 is for detecting the rotational position of the pickup roller 76.

Therefore, the ADF CPU 100 receives an input signal from each sensor and switch connected to the input terminal and controls the jam state and various functions.

Now, the process of the present invention will be described with reference to the accompanying flowchart.

4 is a flowchart of a jam detection routine according to the present invention, FIG. 5 is a flowchart of a jam releasing routine according to the present invention, and FIG. 6 is a flowchart of a jam processing routine according to the present invention.

First, look at the process of detecting the jam in the present invention as follows. When document feeding starts (401), timer 1 of the ADF CPU 100 is started (402). Then, the document standard detecting sensor 103 checks whether the leading edge of the original is detected during the set time of the timer 1. At this time, if the leading edge is not detected for the set time (404), the miss feed flag is turned on (406) and returned. When the front end of the document is detected, the timer 2 is started (403), and then the rear end of the document is detected during the set time of the timer 2. If the rear end of the document is not detected (408), a paper jam flag (JAM Flag) is detected. Returns on. On the other hand, if the original end of the original is detected within the set time of timer 2 (407), after copying the original (410), the timer 3 is started (411) while starting the discharge of the original (411).

Then, the leading edge of the original is detected through the discharge detection sensor 106 during the set time of the timer 3 (413). If the original is not detected within the predetermined time (414), the discharge failure flag is turned on (416). do. When the leading edge of the original is detected by the discharge detection sensor 106, timer 4 is started (415), and the trailing edge of the original is detected for the set time (417). In this case, if the trailing edge of the original is not detected within the set time (418), the discharge jam flag is turned on (419).

Through this process, the jam generated during the operation of the ADF is detected. As mentioned above, in addition to the process of setting the paper jam flag and the paper jam flag (409 and 419), the paper feed and misfeed flag is set. Each set is to be set so that the jam generated can be classified and processed.

In general, the types of jams that can occur in the ADF can be roughly classified into the following six types.

1.If an original is jammed in the ADF's original detection sensor,

2. If the document is jammed in the ADF output sensor,

3. Misfeed jam caused by the document not reaching the document standard detection sensor within a certain time (timer 1 setting time) during ADF operation,

4. Misfeed jam caused by the document not reaching the output sensor within a certain time (timer 3 set time) while ADF is running,

5. Jams caused by setting the jam flag by artificially pressing the ADF feeder by hand while the ADF is waiting for operation, the sensor detecting the actuator and mistaken for the jammed paper.

6. Jam in the ADF discharge section in the same manner as in item 5.

However, in the present invention, as shown in FIG. 5 (Jam processing routine), first, it is judged by the document presence sensor whether the document is set on the document glass (431). Call 432 to be performed (432). The jam releasing routine performed at this time is shown in FIG. 6. In brief, the process determines whether the ADF has been lifted (421), and returns if it has not been lifted. After the discharge failure flag is reset (422, 423), the jam display element (LED light) is turned off (424), the ADF lift signal is transmitted to the copier side, and returned to the jam processing routine again.

Then, the jam processing routine checks whether or not an original is detected in the discharge sensor. In the first case, the original is not detected in the discharge sensor because the document is irrelevant to the discharge unit. Is detected (434), if detected, the jam flag is set (441); otherwise, it is checked whether the paper feed or output failed jam flag is ON (435), and the paper feed jam flag is turned off. If so, then check if the jam flag is set (436). Thus, if the jam flag is set, clear the jam flag (437), turn off the jam indicator (LED) (438), send an ADF lift signal to the copier (439), and then feed and discharge the jam flag or It is checked whether the jam flag is set (440).

In addition, after detecting the original through the document detection sensor, if the jam flag is set 441 or if the paper feed or discharge jam jam flag is on (435), or no jam flag is set (436), Immediately proceed to the step of determining whether the paper jam and discharge jam jam flag or jam flag is set (440), if it is not set, return, and if it is set, emit the jam display LED (446), and transmit the jam signal to the copier. Return (447).

On the other hand, when an original is detected in the document detection process through the discharge sensor (433), a jam signal is sent to the copier side (442), after the jam display LED is emitted (443), and the jam flag is set (44). Returns.

On the other hand, if the original is not set in the determination of whether or not the original is set in step 431, after performing the jam release routine (refer to FIG. 6) mentioned above (448), the original is detected through the discharge sensor. Detect (449). At this time, when the document is detected by the discharge sensor, a jam signal is transmitted to the copier (450), the jam display LED element is emitted (451), the jam flag and the discharge flag are set (452, 453), and then returned. .

However, if the document is not detected by the discharge sensor, the presence or absence of the document is detected through the document standard detection sensor (454), and if detected, the jam flag and the paper feed failure flag are set (455, 457). If the state of the paper feed or discharge failure jam flag is determined (ON) (456), it is determined whether the state is a discharge failure (458). Thus, as described above, when the jam flag and the paper feed jam flag by the original detection of the document detection sensor are set (455, 457), or when the discharge jam jam flag is turned on (21), it is checked again whether or not the flags are set. After 463, the jam display LED element is made to emit light (464), and then the jam signal is transmitted to the copier (465) and returned. If the document is not detected through the document standard detection sensor and the paper feed and discharge failure flag is turned off (454, 456), that is, if no jam flag is set (463), it returns immediately.

On the other hand, if the paper failed jam flag is turned on even though the document is not detected through the document standard detection sensor (458), the jam flag and the paper jam jam flag are cleared (459, 460). After the LED element is turned off (461), the ADF lift signal is transmitted (462) to the copier side and returned.

Now, the processing of the six jam types will be described.

First, in the first case, the document is jammed in the ADF document detection sensor. When the control flow is explained based on the reference numerals in the drawing, the process of 431 → 432 → 433 → 434 → 441 → 440 → 446 → 447 The processing is performed by.

However, if the document is still placed on the document glass and the document is jammed in the document detection sensor, lift the document glass to remove the jammed document, or remove the document set on the document glass and do not lift the document glass. In the latter case, for example, the control flow is 431 → 432 → 433 → 434 → 435 → 436 → 437 → 438 → 439 → 440 → Return to remove the jam from the ADF. do.

In this case, the transmission of the ADF lift signal of 439 is not actually lifted by the user, but is automatically generated by the control of the present invention and is sent to the copier side so that the ADF is actually treated as if it was lifted.

Next, the second case is a case where an original is jammed in the ADF discharge detection sensor, which can be divided into a case where an original is placed on the platen glass and a case where there is no original on the platen glass. If there is no original on the platen (i.e., when the jam flag and the discharge jam jam flag are set because the last original is jammed in the discharge sensor), the control flow goes directly to 448 from 431 in FIG.

In this case, there may be two paths to recognize the jam, one of which is recognized by the process of 431 → 432 → 433 → 442 → 443 → 444 → returned, and the other is 431 → 448 → 449 →. The jam is recognized by the process of 450 → 451 → 452 → 453 → return. In this situation, when the original is removed from the discharge sensor, the path of jam is released. In the case of the former, 431 → 432 → 433 → 434 → 435 → 436 → 437 → 438 → 439 → 440 → 440 are returned. The jam is released, and in the latter case, the jam is released by the process of 431 → 448 → 449 → 456 → 454 → 458 → 459 → 460 → 461 → 462 → 463 → return.

That is, even if the user does not lift the ADF, the jam is automatically released through the above process.

Looking at the case of the third jam, the jam at this time is a jam caused by the document is not reached to the original standard detection sensor, the jam processing is performed with the paper feed jam jam flag set.

Even in this case, if the user simply removes the jammed paper without lifting the ADF, the jam is automatically released. At this time, if the process of releasing jam is simply listed, 431 → 448 → 449 → 454 → 456 → 458 → 459 → 460 → 461 → 462 → 463 → the process is returned. You can start the copy operation again.

The jam processing is performed while the fourth discharge flag is set. In this case, since the document to be discharged is still located on the ADF belt, the jam cannot be removed without lifting the ADF. Therefore, the jam is released only when the user lifts the ADF and removes the copied original as before.

The fifth and sixth jams are cases in which the user intentionally moves an actuator (feeder) or an ejector of the discharge unit, and the jam flag is set for a while. Therefore, there is no need to lift the ADF. In more detail, the jam flag is set in the following path when the user presses the paper feeder or discharge unit by hand. The jam flag is set by a process of 431 → 448 → 449 → 450 → 451 → 452 → 453 → return, or 431 → 448 → 449 → 454 → 455 → 457 → 463 → 464 → 465 → return. However, the next time you release your hand, the actuator will return to normal and the jam will be automatically released in the following way.

That is, the jam is released by the process of 431 → 448 → 449 → 454 → 456 → 458 → 459 → 460 → 461 → 462 → 463 → Return.

As described above, the present invention can deal with all jams that may occur during the use of the ADF, and in particular, eliminates the unnecessary operation that the user directly performed.

Therefore, the present invention greatly improves the convenience of use of the automatic document feeder (ADF), which is increasingly used as a peripheral device of a copying machine, and has an effect of supporting a very quick copying function.

Claims (3)

Copier side control means 200 is provided with a control means 100 of the automatic document feeder (ADF) connected to send and receive a control signal, the input standard of the ADF control means, the document standard detection sensor 103, the document presence detection A sensor 105, a discharge detection sensor 106, a lift detection sensor 107, a pickup roller position detection sensor 108, a mode selection switch 109 and a document standard adjustment switch 113 are connected to each other, and the ADF control In the jam release method of the automatic document feeder configured to be connected to the motor 110 and the display means 112 to operate according to the control, the jam generated during the operation of the jam jam, discharge jam, feeding failure And a first step of detecting and distinguishing each of them into a misfeed and setting a flag assigned to each of them. Determining whether the document is set on the document glass through a document presence sensor (431), and if there is an original, calling and performing a jam releasing routine (432) (432); After performing the second step, it is checked whether or not the document is detected by the discharge sensor (433) and if detected, transmits a jam signal to the copier side, emits a jam display, and executes and sets a jam flag (442 to 444). ) Third step; By checking whether the document is detected by the document detection sensor, the status of the paper feed and exit jam jam flag, and the status of the jam flag (434, 435, 436), the jam flag is set (441) or cleared (437). 4th step; After performing the fourth step, check whether the paper feed and discharge failed jam flag and the jam flag are set (440), and if not set, returns, and if set, emits the jam display LED (446), and jams with a copier. A fifth step of returning after transmitting the signal (447); A sixth step of performing a jam releasing routine (448) if the original is not detected by the document presence sensor after performing the fifth step; Detecting whether or not the document is detected by the discharge sensor (449), and if detected, performs the jam signal transmission to the copier side, light emitting the LED display for jam display, jam plug and discharge flag set operation (450 to 453) Seventh step; After performing the seventh step, by checking whether the document is detected by the document standard detection sensor, the status of the paper feed and discharge jam jam flag and the state of the jam flag (454, 456, 458) to set the jam flag and the paper jam jam flag An eighth step of making or clearing; And after performing the eighth step, check whether the paper feed and discharge failed jam flag and the jam flag are set (463), and if not set, return, and if set, emit the jam display LED (464), A ninth step of transmitting a jam signal (465); JAM automatic release method of the automatic document feeder, characterized in that performed by. According to claim 1, wherein the first step is to start the timer 1 of the ADF control means 100 when the document feed is started, and check whether the leading edge of the document is detected during the set time through the document standard detection sensor 103 A first step of setting a paper feed failure flag; A second step of starting a timer 2 when the document end detection is detected by the document standard detection sensor, and detecting a detection of the document end end during the set time to set a paper jam flag; If the end of the original is detected within the setting time of timer 2 above, after copying the original, timer 3 is started while the document is discharged, and the leading end of the original is discharged through the discharge detection sensor 106 during the setting time. Detecting and setting a badge failure flag; And a fourth step of starting a timer 4 (415) when the front end of the document is detected by the discharge detection sensor, and detecting the rear end of the original for the set time, and setting the discharge jam flag. JAM automatic release method of the automatic document feeder, characterized in that performed by. The method of claim 1, wherein the jam releasing routine performed in the second or sixth step comprises: (421) determining whether the ADF is lifted; And if the ADF has not been lifted, resets the jam flag and the supply / badge failure flag (422, 423), turns off the jam indicator (LED light) (424), and then returns the ADF lift signal to the copier. A second process of transmitting and returning; JAM automatic release method of the automatic document feeder, characterized in that performed by.