JPH04317940A - Circulating document sheet transporting device - Google Patents

Abstract

PURPOSE:To prevent breakage of document sheet at the time of jamming and facilitate taking-out of the jamming sheet. CONSTITUTION:The stopping position of a tray 310 is predetermined in correspondence to the part where jam is generated, which is located by location sensors ENTS, LOOPEJT1S, LOOPEJT2S, etc. On the occasion of jamming, the tray 310 is moved to this predetermined stopping position.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circulation type document conveying device that feeds a document from a document stacking device to a document reading section and discharges the document from the document reading section to the document stacking device.

0002

2. Description of the Related Art Conventionally, in a movable document conveying device, a document loading tray is stopped at the upper limit position immediately after copying starts, and the tray is stopped at the lower limit position during copying. Further, when copying is completed and all the originals are ejected onto the original stacking device, the tray is moved to the upper limit and then stopped. When a document jam is detected in such a document feeder,
It is known that the movement of the tray is forcibly stopped regardless of the position of the document or the vertical position of the tray.

0003

However, once the tray has stopped, there is a problem in that it is difficult to remove the jammed original depending on the position where the jammed original occurs.

[0004] Furthermore, if the tray is unconditionally moved to the upper limit position of the initial position in order to facilitate jam handling, there is a problem that the original may be damaged or damaged depending on the position of the original jam.

SUMMARY OF THE INVENTION In view of the above-mentioned points, an object of the present invention is to provide a circulation-type document conveying device that allows an operator to easily remove jammed documents and prevents damage to the documents. It is in.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a document stacking device capable of raising and lowering a stacking member for stacking documents, and a document loading device for feeding the documents to a document reading section. , in a circulation type document conveyance device comprising a circulation conveyance device that discharges the document from the document reading section to the document stacking device, a jam position detection means for detecting a document jam in the circulation type conveyance device and its position; and a position control means for moving the stacking member to a predetermined position and stopping the stacking member in accordance with the position of the jammed original and the vertical state of the stacking member when the jammed document is detected by the jam position detection unit. It is characterized by having the following.

Further, in the present invention, when the jam position detection means detects a document jam in the feeding state, the position control means moves the stacking member to an initial position;
It is characterized by stopping.

Furthermore, in the present invention, when the jam position detection means detects a document jam in the discharged state,
The position control means is characterized in that the loading member is stopped and held at the current position.

Still further, when the jam position detection means detects removal of the jammed document in the discharged state, the position control means moves the stacking member to an initial position and stops the stacking member. .

0010

According to the present invention, a stopping position of a stacking member, such as a tray, is determined in advance, depending on the position where a document jam occurs, so that the document can be easily picked up and the document is not damaged. More specifically, the tray stop position is set as the initial position for a document jam in the feeding state, and the tray stop position is set as the current position for a document jam in the discharge state. When a document jam is detected, the tray is moved to the above-mentioned stop position in accordance with the detected document jam position.

[0011]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows the cross-sectional structure of a copying machine to which the present invention is applied.
and shown in FIG.

FIG. 1 shows the left sectional structure of the upper part of the copying machine, and FIG. 2 shows the right sectional structure of the upper part of the copying machine.

In the figure, 100 is the main body of the copying machine, 300
is a sequential automatic document feeder (hereinafter referred to as RDF) that automatically feeds documents.
It can be used in any combination with 0.

RDF (circulating automatic document feeder) (30
0) As shown in detail in FIG. 1, the RDF 300 has a document bundle S
A stacking tray 31 serves as a first document tray for setting
0 and a stacking tray 350 as a second document tray on which a document bundle SS is set.

Further, the stacking tray 310 side is equipped with feeding means that constitutes one part of the document feeding means. This feeding means includes a half-moon roller 331, a separation conveyance roller 332, a separation belt 333, and a separation motor SPRM.
TR (see Fig. 3), registration roller 335, full-surface belt 336, and belt motor BELTMTR (see Fig. 3).
), the large transport roller 338, and the transport motor FEED.
MTR (see FIG. 3), paper ejection roller 340, flapper 341, recycle lever 342, and paper feed stopper 3
43, a paper feed sensor ENTS, a reflection sensor TRNS, a paper ejection sensor EJTS, etc.

Here, the half-moon roller 331, separation conveyance roller 332, and separation belt 333 are separated by a separation motor SPRMT.
R to separate the documents one by one from the bottom of the document bundle S on the stacking tray 310.

Furthermore, the registration roller 335 and the full-surface belt 336 rotate and separate the original documents by the belt motor BELTMTR, and move them through sheet paths "1" and "2" to the exposure position ( Seat pass "3"
”). Further, the large transport roller 338 is rotated by the transport motor FEEDMTR to
The upper document is conveyed from sheet path "3" to sheet path "5". The document conveyed to sheet path "5" is returned onto the document stack S of the stacking tray 310 by a paper discharge roller 340. Note that the path numbers in the diagram are marked with ○ due to the notation.
It is expressed by the numerical value inside the symbol.

The recycle lever 342 is for detecting one cycle of the original. When the original is started to be fed, the recycle lever 342 is placed on the top of the original bundle S, and the original is fed one by one.
When the rear end of the final document passes through the recycle lever 342, it falls due to its own weight, and one cycle of the document is detected.

In the above-mentioned feeding means, when a double-sided document is used, the document is guided once from sheet path "1", "2" to "3", and then the leading edge of the document is rotated by rotating the large transport roller 338 and switching the flapper 341. leads to seat path "4". Next, the document is passed through a sheet path "2" by the registration rollers 335, and thereafter, the document is conveyed onto the document table glass 101 by the full-surface belt 336 and stopped, thereby inverting the document. In other words, the original is passed through sheet paths "3" to "4" to "2".
” route.

Note that the originals in the original bundle S are passed through sheet paths "1" to "2" to "3" to "4" to "5" one by one,
The number of originals can be counted by transporting the originals until the recycle lever 342 detects that they have gone through one cycle.

In FIG. 2, the sheet original S after the image reading on the original platen glass 101 is placed on the original platen glass 101.
A second document discharge path (sheet path "7") is configured to carry out the document on the opposite side to the direction in which the document is carried in and to the top of the document bundle S on the document tray 310.

In the sheet path "7", a first transport roller 380 and a second transport roller 381 for transporting the sheet original S are arranged, and further downstream of the sheet path "7", a third paper discharge roller is disposed. A roller 382 is provided to transfer the sheet bundle S conveyed through sheet path "7" to the document tray 310.
The document is discharged onto the top of the upper document bundle S.

A document discharge cover 383 is arranged above the sheet path "7", and a third document discharge cover 383 is arranged above the sheet path "7", and the sheet path "3" branches from near the downstream side of the full-surface belt 336 and extends to the sheet path "13". A paper path (sheet path “13”) is configured.

A paper ejection flapper 355 for switching the conveyance path is arranged at the branching point between sheet path "3" and sheet path "13", and the solid line in the figure is turned on/off by the paper ejection flapper solenoid RFLAPSL. The path is switched by swinging between the position and the broken line position. A paper ejection roller 36 is located downstream of the sheet path "13".
2 is provided, and discharges the sheet document S conveyed through the sheet path "13" onto the document discharge cover 383.

In the sheet path "7", a second sheet discharge sensor LOOPEJTS, which is a transmission type optical sensor, is arranged to detect the front and rear ends of the sheet document S in the sheet discharge path.

[0027] On the right side of the RDF300 main body, a document carrying path (sheet path "12") for receiving a sheet document from outside the main body into the RDF main body is opened.
12'' to the sheet path ``7'' is configured.

Next, the swinging operation of the document tray 310 will be explained.

In FIG. 1, the tray swing motor TRAYM
The motor output shaft of the TR (see FIG. 3) is coupled to a tray swing arm shaft 348. A tray swinging roller 347 is coupled to the lower surface of the document tray 310. The tray swing roller 347 is provided at the tip of the tray swing arm 346, and the tray swing arm shaft 3 is provided on the opposite side of the tray swing arm 346.
It is fixed at 48. As the tray swing arm shaft 348 rotates, the tray swing arm 346 swings between the solid line position and the broken line position in the figure, and swings the document tray 310 between the solid line position and the broken line position in the figure around the swing center. move.

TRAYUPLMTSW is the original tray 31
TRAYDOWNLMTSW is an upper limit switch that detects that the document tray 310 has reached the upper position (solid line position), and TRAYDOWNLMTSW is a lower limit switch that detects that the document tray 310 has reached the lower position (broken line position). TRAYMTR controls rotation by detecting upper and lower limit switches.

Turning to FIG. 2, the stacking tray 350 side is also equipped with feeding means constituting the other part of the document feeding means. This feeding means includes a half-moon roller 351, a separation conveyance roller 352, a separation belt 353, a registration roller 354, a conveyance motor RFEEDMTR, a paper feed stopper 359, a scheduled paper feed sensor RENTS, and a document detection sensor REMPS. , a paper discharge roller 362, and the like.

Here, when the conveyance motor RFEEDMTR is turned on, the half-moon roller 351 and the separation conveyance roller 352 are turned on.
Then, the separation belt 353 rotates and separates the documents one by one from the bottom of the document bundle SS on the stacking tray 350.

Also, the conveyance motor RFEEDMTR is turned on to rotate the registration roller 354, and the belt motor B
When the ELTMTR is turned on in reverse and the full-surface belt 336 is reversed, the original separated from the original stack SS is transferred to the sheet path "
11'', ``12'' to ``7''.

Note that the belt motor BELTMTR is turned on for normal rotation, the entire belt 336 is turned on for normal rotation, and the reservation conveyance motor R is turned on.
When FEEDMTR is turned on in reverse and the paper ejection roller 362 is reversed, the original on the document platen glass 101 is moved through the sheet path "
3", the sheet can be discharged onto the upper cover (not shown) through the sheet path "13".

RDF control device FIG. 3 is a block diagram showing the circuit configuration of the control device of the circulating type automatic document feeder of this embodiment.
, a one-chip microcomputer (CPU) 301 with built-in RAM, etc. Microcomputer 3
Signals from various sensors are input to input ports I1 to I13 of 01. In addition, the output port 01 of the microcomputer 301
Each load is connected to 016 via drivers D1 to D16, and control data is exchanged with the main body of the copying machine via communication IC 302. RDF30
The data transmitted from 0 to the copying machine main body 100 is a signal that the document has been fed onto the platen glass (original table glass 101).

Control procedures (control programs) as shown in FIGS. 4 to 18 are stored in advance in this ROM, and each input/output is controlled according to the control procedures.

(Main Flow) The operation of this embodiment will be explained using the flowcharts shown in FIGS. 4 to 18.

In particular, FIG. 4 is a main flowchart in this embodiment, and various operations described below will be explained using this flowchart.

In step 1, in order to move the original tray 310 to the position indicated by the solid line in FIG. 1, a tray up (UP) process, which will be described later, is performed to initialize the position of the original tray 310.

[0040] In step 2, the original S is placed on the tray 31.
The microcomputer 301 determines whether the copy key (not shown) on the main body 100 has been turned on, and if the determination is positive, separation processing and paper feeding processing (s) described later are performed.
step 4, 5).

[0041] Through this paper feeding process, the bottom document is
is placed on the paper path "3", and the copying operation of the main body 100 is started (step 6). At that point, the microcontroller was 30
1 determines whether the partition lever 342 has fallen (step 7).
), if the judgment is affirmative, wait for the end of copying (step 9
) After performing switchback paper ejection processing (described later) (ste
p10), the document S is returned onto the document tray 310, and the process ends.

If a negative determination is obtained in step 7, the microcomputer 301 determines whether the document size determined by the size detection process described later is larger than, for example, an A4 document (step 8). If the determination result is affirmative, a switchback circulation flag is set in the RAM in the microcomputer 301 (step 12). If the above judgment result is negative, the tray down (D
OWN) process, and the tray 310 is stopped at the position indicated by the broken line in FIG. 1 (step 11).

Next, the microcomputer 301 performs paper feeding processing before separating the next original (steps 4' and 13), completes preparations for replacing the original, and waits until the copying operation is completed (steps 4', 13).
step 9').

[0044] When the copy operation is completed, the microcomputer 301
determines whether the switchback circulation flag is set. If a positive judgment is obtained, the microcomputer 30
Step 1 is to start the switchback paper ejection process and set the sheet path "
A control operation is performed to return the document on the tray 310 onto the tray 310 (step 10'). If a negative judgment is obtained,
Start the closed-loop paper ejection process described later (step 15)
, tray 3 via sheet path “3” → “7” in Figure 1.
A control operation is performed to return the document to step 10.

[0045] The microcomputer 301 performs step 15 and st.
At almost the same time as ep10', the next document is fed (s
step 5'), the sheet path "3" on the original platen glass 101
” Place the next manuscript. After that, the microcomputer 301 starts the copying operation (step 6'), and the partition lever 342
A fall determination is made (step 7'). If the determination result is negative, the process returns to step 4' and repeats each process.

If the determination result in step 7' is affirmative, the microcomputer 301 waits for the end of copying (step 7').
ep9″), and depending on whether the switchback circulation flag is set (step 14′), a closed loop paper ejection process and a switchback paper ejection process are started (s
(steps 15', 10'').Furthermore, wait until all originals have been discharged (step 16), and then determine whether or not it is the final cycle of RF sorting (step 17).If a negative determination is obtained, It is determined whether the number of originals is 4 or less (step 18). If the result of this determination is positive,
After setting the above switchback circulation flag (ste
p19), return to step 4 and repeat each process.

If the determination result in step 18 is negative, the process returns to step 4 and repeats each process.

[0048] If an affirmative determination is obtained in step 17, tray up (UP) processing (step 1') is performed.
The tray 310 is initialized to the position shown by the solid line in FIG. 1, and the entire process is completed.

(Separation Process) The separation process in step 4 in the main flowchart shown in FIG. 4 will be explained based on FIG. 6.

In the separation process (step 4), if the document is the first document (step 4-1), the microcomputer 301 activates the partition member motor (RSMTR) to operate the partition member 342 for detecting the separation of the document bundle P. ) and turn on the separation delay timer to detect separation delays due to document jams.

Furthermore, at the same time as turning on the separation motor (SPRMTR) to separate the document bundle P (step 4-3), a jogging process to be described later is started to align the document bundle P in the width direction (step 4-3). 5).

Thereafter, when the jogging process is completed in the microcomputer 301 (step 4-7), the paper feed stopper 34 is moved so that only one document at the bottom of the document bundle P is separated.
Stopper solenoid (STPSL)
) is turned on (step 4-9). The original is sheetpass
1", and when the registration sensor (ENTS) detects the leading edge of the document (step 4-11), the microcomputer 301 starts speed control to drive the separation motor (SPRMTR) at a low speed. Furthermore, the separation loop timer is started (step 4-13), and after this set time ends (s
step 4-15), and turn off the separation motor (SPRMTR) (step 4-17).

As a result, the document is transferred to the feeding roller pair 33 at a low speed.
Since the tip is abutted against the nip portion of the document 5, damage to the tip of the document can be prevented and collision noise can be reduced, and the document stops after a predetermined amount of loop has been formed. This serves to correct skew even if it occurs during separation. By the way, if a negative determination is obtained in step 4-11, and a document separation delay is detected, the process moves to paper feed jam (JAM) processing, which will be described later (step 4-1).
9).

(Paper Feeding Process) The paper feeding process in step 5 in the flowchart shown in FIG. 4 will be explained based on FIG. 7.

In the paper feeding process (step 5), the microcomputer 301 controls the feeding roller pair 335 and the entire surface belt 33.
6 to move the document from sheet path “1” to sheet path “
2", a belt motor (BELTMRT
) is turned on for forward rotation. In addition, in order to detect the presence or absence of paper stagnation due to a document jam during this conveyance, a paper stagnation timer is turned on (step 5-1), and at the same time, a size check counter that counts based on the clock signal input from the belt clock interrupter (BELTCLK) is activated. (step 5-2), and starts measuring the document size.

Furthermore, at the same time, the microcomputer 301 starts a registration process to be described later (step 5-3). Then, as the original is being transported, the leading edge of the original is the paper feed sensor (ENTS).
(step 5-4), the microcomputer 301
stops the above size check counter (step
5-5), the document size is determined in the size check subroutine shown in FIG. 16 based on the data (s
step 5-6).

Furthermore, the paper feeding process is completed when the registration process started above is completed (step 5-7).
. By the way, if a negative determination is obtained in step 5-4, the paper feed JA described below detects the paper feed stagnation.
The process moves to M processing (step 5-8).

(Pre-Paper Feeding Process) The pre-paper feeding process in step 13 in the flowchart shown in FIG. 4 will be explained based on FIG. 8.

[0059] The microcomputer 301 first selects the separation clutch (
SPRCL) is turned on (step 13-1), the separation unit and the registration rollers are connected to enable the separation roller 332, separation conveyance belt 333, and registration roller pair 335 to operate, and the separation motor (SPRMTR) is turned on. at the same time,
The pre-feed timer drives the separation motor (SPRMTR) until it counts up. Through this process, the document A is set to be conveyed 30 mm from the nip portion of the registration rollers to the reference position for exposure, as shown in FIG. When the previous paper feed timer has finished counting up (
step 13-5), the microcomputer 301 controls the separation motor (S
PRMTR) is immediately turned off (step 13-6),
The pre-feeding process ends (step 13-7).

(Switchback Paper Discharge Process) The switchback paper discharge process in step 10 in the flowchart shown in FIG. 4 will be explained based on FIG. 9.

Switchback paper discharge processing (step 10)
In order to eject the original on the original table glass 101, the microcomputer 301 turns on the belt motor (BELTMTR) in reverse (step 10-1), and when the leading edge of the original is detected by the first ejection sensor (EJTS) (step 10). -2)
, turn on the reversing motor (FEEDMTR) (step
10-3).

Therefore, the document is conveyed from sheet path "3" to sheet path "5", and the trailing edge of the document is detected by the first paper ejection sensor (EJTS) (step 10-4).
. In response to this detection, the microcomputer 301 starts the conveyance counter FC1 (s
step 10-5).

After the count-up of the conveyance counter FC1 is completed, the microcomputer 301 controls the speed of the reversing motor (FEEDMTR) and starts the counter FC2, which determines the distance for discharging the original onto the original tray 310 (step 10). -7). Reverse motor (FEEDMTR) until counter FC2 finishes counting up.
Continue speed control (step 10-8), and counter FC
When the count-up of 2 is completed (step 10-9)
, turn off the reversing motor (FEEDMTR) (step
10-10).

After this, an interval is taken until the original falls onto the original tray 310. Next, the microcomputer 301 starts the paper ejection drop timer ORG-DWN-TM (step
10-11) After this timer finishes counting up (s
step10-12), the jogging solenoid (JOGSL) is turned on so as to push out the jogging guide 370 in order to align the discharged originals. At the same time, microcontroller 301
is the timer EJCT-JOG- that determines how long it is pressed.
Start the TM (steps 10-15), and after the timer finishes counting up (steps 10-17), turn off the jogging solenoid (JOGSL) (steps 10-15).
p10-19), the switchback paper ejection process ends.

(Closed Loop Paper Discharge Process) The closed loop paper discharge process in step 15 in the flowchart shown in FIG. 4 will be explained based on FIG. 10.

FIG. 20 shows the state of the document P at the time when the closed loop paper ejection process is started.

Here, the microcomputer 301 waits for the second paper ejection sensor (LOOPEJT1S) to detect the leading edge of the document on page "5" in FIG. Turn on the Loopejct delay timer (step 15-2). However, at this time, the entire belt 336 is not driven during the closed loop paper ejection process.

Therefore, steps 4 to 5' in FIG.
20, the separation, pre-feeding, and paper feeding processes for the next original page "4" in FIG. 20 are performed, and the relationship between the originals becomes as shown in FIG. 21. Furthermore, the closed-loop ejection process is started for the document on page "4" as well. Further, document separation and front paper feeding processing for page "3" are performed. After this, during the paper feeding process, as shown in FIG.
The leading edge of the document is detected by the second paper ejection sensor (LOOPEJT1S).
) is detected, and the third paper ejection sensor (LOOPEJT2S)
detects the leading edge of the document on page “5” (step 15-3)
.

During this time, the LoopEjct timer is turned off, and when a LoopEjct delay is detected, the microcomputer 30
1 control moves to the paper discharge JAM process described later (step 15).
-4). When the paper feeding process for page "3" of the original is completed, the original is arranged as shown in FIG.

During the paper feeding process after the document separation and pre-feeding process for page "2", the third paper ejection sensor (LOOPEJT2S) detects the leading edge of the document for page "5" as shown in FIG. ,
At the same time, the microcomputer 301 controls the paper ejection motor (EJCTMTR).
(step 15-5), and the document on page "5" is transferred to the second page.
The conveyance roller 381 begins to pull it out.

The microcomputer 301 determines whether the original is the first discharged original (step 15-6). If the determination result is positive, the microcomputer 301 turns on the partition member motor (RSMTR) (step 15-6) to prevent the ejected original from getting into the partition member, and moves the trailing edge of the original to the third ejector. Wait for the paper sensor (LOOPEJT2S) to detect it (step 15-7).

During this time, when the LoopEjct retention timer is turned off and LoopEjct retention is detected, the microcomputer 3
01 control moves to the paper discharge JAM process described later (step 1
5-9). After that, if the partition member motor (RSMTR) is on, stop the motor (step 1).
5-9′).

As shown in FIG. 25, even if the full-surface belt 336 stops after the paper feeding process for the document on page "1" is completed, the document on page "5" is transported in the direction of the arrow in FIG. 25 by the second conveyance roller 24. continues to be emitted. Third paper ejection sensor (LOOPEJT
2S) detects the trailing edge of the document on page "5", the third paper ejection sensor (LOOPEJT2S) detects the third transport roller 3.
The closed-loop paper discharge counter 1 that counts the moving time corresponding to the distance 10 mm before the center of the nip 82 is started (step 15-10).

Until this closed loop paper ejection counter 1 ends, the microcomputer 301 sets the ejection speed to a low speed (s
step 15-11), when the closed loop paper ejection counter 1 finishes counting up (step 15-13), the drive of the paper ejection motor (EJCTMTR) is stopped (step 1
5-15).

Next, the microcomputer 301 starts a closed-loop ejection drop timer corresponding to the time it takes for the leading edge of document "5" to fall from the solid line position to the broken line position in FIG.
p15-17).

[0076] When the count-up of this closed-loop paper ejection drop timer is completed (steps 15-19), the microcomputer 3
01 drives the paper discharge motor (EJCTMTR) (st
ep15-21). Next, the document “5” is transferred to the third transport roller 3.
The microcomputer 301 starts the closed loop paper ejection counter 2 corresponding to the distance completely separated from the paper 82 (step 15-2).
3) Wait for the closed loop paper ejection counter 2 to finish counting up and stop driving the paper ejection motor (EJCTMTR) (s
step 15-25) (step 15-27).

After the microcomputer 301 ejects the document "5" to the position shown in FIG.
Start OOP-DWN-TM (step 15-29
). After this timer finishes counting up (step 1
5-31), the microcomputer 30 is used to align the ejected documents.
1 turns on the jogging solenoid (JOGSL) so as to push out the jogging guide 370 (step 15)
-33). At the same time, the microcomputer 301 starts the timer LOOP-JOG-TM, which determines the length of time the button is pressed (
step 15-35), after this timer finishes counting up (step 15-37), the jogging solenoid (
JOGSL) is turned off (step 15-39), and the switchback paper ejection process is completed.

[0078] By executing such processing steps, the closed loop paper ejection processing is completed. At this time, the feed amount by the closed loop paper ejection counter, the second conveyance roller 381, the third conveyance roller 3
The feed amounts determined by 82 will definitely match.

(Tray up (UP) processing) The above RDF
The tray UP process will be explained based on FIG. 12.

In order to raise the document tray 310 to the position indicated by the solid line in FIG.
The tray swing motor (TRAYMTR) is driven until the TRAYUPLMTSW) is turned on. Upper limit SW
(TRAYUPLMTSW) turns on, microcontroller 3
01 stops the driving of the tray swing motor (TRAYMTR). Note that detection of the original is prohibited during this process.

(Tray down (DOWN) processing) Above R
Tray DOWN processing by DF will be explained based on FIG. 13.

In order to lower the document tray 301 to the position indicated by the broken line in FIG.
The tray swing motor (TRAYMTR) is driven until the TRAYDOWNLMTSW) is turned on. When the lower limit SW (TRAYDOWNLMTSW) is turned on, the microcomputer 301 turns on the tray swing motor (TRAYMTR).
) to stop driving. Note that detection of the original is prohibited during this process.

(Jogging Process) The flow of the jogging process described above will be explained according to the flowchart of FIG.

In the jogging process (SUB1), first the counter JOG-C which determines the number of jogging operations is performed.
Initialize N and set the jogging guide 370 of the width regulating member.
Jogging solenoid (JOGSL) for pushing out
is turned on by the microcomputer 301. At the same time, microcontroller 3
01 starts the timer JOG-TM, which can be set arbitrarily (SUB1-3), and when the timer JOG-TM completes the set time (SUB1-5), the jogging guide 37
Jogging solenoid JOG to return 0 to the initial state
Turn off SL. Next, the microcomputer 301 starts the timer JOG-TM in the same way as above (SUB1-7),
When the time set on the timer ends, increase the number of times you jog (SUB1-9) and set the jogging guide 370.
The process returns to process step SUB1-3 and is repeated until the reciprocating movement is completed three times (SUB1-11). As a result, the document bundle P is aligned in the width direction, and skewing, lateral registration, etc. can be prevented.

(Registration Processing) The registration processing will be explained using FIG. 15.

When the trailing edge of the document is detected by the paper feed sensor (ENTS) (SUB2-1), the document is transferred to the platen 101.
Registration counter RG for stopping at a predetermined position above
CN is counted by the belt clock interrupter. Note that the document feeding amount and the count value are configured to surely match. Next, the microcomputer 301 starts low-speed control of the belt motor (BELTMTR) in order to accurately stop the belt motor (BELTMTR) at the stop position on the platen glass 101, and continues the control until the registration counter RGCN finishes counting up (SUB2-4). ). When the count-up ends, the microcomputer 301 turns off the output of the belt motor (BELTMTR) (SUB2-5).
), and then turns on the electromagnetic brake to stop the document at a predetermined position (SUB2-6).

(Size Check Process) The size check subroutine will be explained based on FIG. 16.

In this embodiment, the microcomputer 301 adds the distance from the nip position of the feeding roller 335 to the registration sensor (ENTS) to the data of the size check counter that determines the original size, and the corrected value is used as the true original. Treat as size. At this time, the document is transferred to the feed roller 335
It is conveyed by the full-surface belt 336, and the feed amount and the counter value by the belt clock interrupter reliably match. Thereafter, the microcomputer 301 determines the size of B5, A4, A4R, B4, A3, etc. based on the corrected size data.

(Paper feed jam (JAM) process) The paper feed JAM process executed in the process of step 4-19 in the flowchart shown in FIG. 6 and the process of step 5-8 in the flowchart shown in FIG. 7 will be explained based on FIG. do.

When the separation delay timer detects a document separation delay in the separation process shown in FIG. 6, or when the paper feed retention timer detects the original paper feed retention in the paper feed process shown in FIG. stop (s
tepA-1).

Next, if the microcomputer 301 detects that this document is not the first document, tray UP processing is performed (step A-5), and then all documents in the document path are removed to prevent document jams. is released (s
tepA-7).

(Sheet Discharge JAM Process) The paper discharge JAM process in steps 15-4 and 15-8 in the flowchart shown in FIG. 10 will be explained based on FIG.

The LoopEjct delay timer in FIG. 10 causes the LoopEjct delay or LoopE
When the LoopEjct retention of the original is detected by the jct retention timer, the microcomputer 301 stops a series of drive systems (step B-1). Next, it waits until all the documents in the document path are removed, and when the document jam is cleared (step B-3), the tray UP process is performed by the microcomputer 301 (step B-5).

The types of document jams and detection methods described above are shown below for reference.

Separation delay: The paper feed sensor (ENT) is activated within a certain time after the separation motor (SPRMTR) is turned on.
S) is not turned on.

Paper feed retention: Belt motor (BELTMTR)
) is turned on for normal rotation, within a certain period of time, the sensor (E
NTS) does not detect the trailing edge of the document.

LoopEjct delay: sensor (LOOP
The sensor (LOOPEJT2S) does not detect the leading edge of the original within a certain period of time after the EJT1S) detects the leading edge of the original.

LoopEjct Retention: Sensor (LOOP
EJT2S) does not detect the leading edge of the original within a certain period of time after detecting the leading edge of the original.

Further, the sensor for detecting the document jam operates as the jam position detecting means of the present invention, and the microcomputer 301 that executes the paper feed jam processing in FIG. 18 and the paper discharge jam processing in FIG. 19 performs the position control of the present invention. Act as a means.

[0100]

[Effects of the Invention] As explained above, according to the present invention,
Each time a jam occurs, the stacking member is automatically moved to a position suitable for removing the jam, so the operator does not have to worry about removing the jam as in the past, and can quickly resume the copying operation.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing a partial structure of an embodiment of the present invention.

FIG. 2 is a side sectional view showing a partial structure of an embodiment of the present invention.

FIG. 3 is a block diagram showing a circuit configuration of a control device according to an embodiment of the present invention.

FIG. 4 is a flowchart showing a control processing procedure executed by the microcomputer 301 in FIG. 3;

FIG. 5 is a flowchart showing a control processing procedure executed by the microcomputer 301 in FIG. 3;

6 is a flowchart showing a control processing procedure executed by the microcomputer 301 of FIG. 3. FIG.

7 is a flowchart showing a control processing procedure executed by the microcomputer 301 of FIG. 3. FIG.

8 is a flowchart showing a control processing procedure executed by the microcomputer 301 of FIG. 3. FIG.

9 is a flowchart showing a control processing procedure executed by the microcomputer 301 of FIG. 3. FIG.

10 is a flowchart showing a control processing procedure executed by the microcomputer 301 of FIG. 3. FIG.

11 is a flowchart showing a control processing procedure executed by the microcomputer 301 of FIG. 3. FIG.

12 is a flowchart showing a control processing procedure executed by the microcomputer 301 of FIG. 3. FIG.

13 is a flowchart showing a control processing procedure executed by the microcomputer 301 of FIG. 3. FIG.

14 is a flowchart showing a control processing procedure executed by the microcomputer 301 of FIG. 3. FIG.

15 is a flowchart showing a control processing procedure executed by the microcomputer 301 of FIG. 3. FIG.

16 is a flowchart showing a control processing procedure executed by the microcomputer 301 in FIG. 3. FIG.

17 is a flowchart showing a control processing procedure executed by the microcomputer 301 of FIG. 3. FIG.

18 is a flowchart showing a control processing procedure executed by the microcomputer 301 of FIG. 3. FIG.

FIG. 19 is a schematic cross-sectional view showing the conveyance state of a document according to an embodiment of the present invention.

FIG. 20 is a schematic cross-sectional view showing the conveyance state of a document according to an embodiment of the present invention.

FIG. 21 is a schematic cross-sectional view showing the conveyance state of a document according to an embodiment of the present invention.

FIG. 22 is a schematic cross-sectional view showing the conveyance state of a document according to an embodiment of the present invention.

FIG. 23 is a schematic cross-sectional view showing the conveyance state of a document according to an embodiment of the present invention.

FIG. 24 is a schematic cross-sectional view showing the conveyance state of a document according to an embodiment of the present invention.

FIG. 25 is a schematic cross-sectional view showing the conveyance state of a document according to an embodiment of the present invention.

FIG. 26 is a schematic cross-sectional view showing the conveyance state of a document according to an embodiment of the present invention.

FIG. 27 is a schematic cross-sectional view showing the conveyance state of a document according to an embodiment of the present invention.

[Explanation of symbols]

301 Microcomputer 310 Tray ENTS Paper feed sensor EJTS 1st paper ejection sensor

Claims (4)

[Claims] 1. A document stacking device capable of raising and lowering a stacking member for stacking documents, and a circulation system for feeding the document to a document reading section and discharging the document from the document reading section to the document stacking device. In a circulation type document conveyance device including a conveyance device, there is a jam position detection means for detecting a document jam in the circulation type conveyance device and its position; 1. A circulation type document conveying device comprising: a position control means for moving and stopping the stacking member to a predetermined position in accordance with the position of a document jam and the vertical state of the stacking member. 2. When the jam position detecting means detects a document jam in a feeding state, the position controlling means moves the stacking member to an initial position and then stops the document jamming. Circulating document feeder. 3. When the jam position detection means detects a document jam in the discharged state, the position control means:
2. The circulating document conveying device according to claim 1, wherein the stacking member is stopped and held at a current position. 4. When the jam position detection means detects removal of the jammed document in the discharged state, the position control means moves the stacking member to an initial position and stops the stacking member. 3. The circulating document conveyance device according to item 3.