JPH03293245A - Paper sheet feeder - Google Patents

Abstract

PURPOSE:To prevent any possible damage of both sheets stapled with each other by detecting the extent of tip edge slippage in double-feed sheets themselves after being delivered out of a sheet stacking part and subjected to a handling action, and when it is not more than the specified value, stopping the handling means. CONSTITUTION:An original sheet delivered out of an original mount 12 by a delivery roller 23 passes through a handling roller pair 25 and, after being subjected to its handling action, the extent of tip edge slippage between sheets themselves is detected by a double-feed detecting sensor 40, thus the double-feed sheet is detected. When the slippage is more than the specified value, it is judged to be merely double feed, and rollers 24a, 26, 27 are rotated in reverse and the double feed sheet is put back to the original mount 12, thus handling operation is performed again. On the other hand, when it is the slippage of less than the specified value, it is judged as the original stapled by a stapler or the like, therefore it is put back to the original mount 12, and rehandling operation will not be done. With this constitution, any possible damage to the sheet is avoidable.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to the use of sheets housed in a stacked manner.
The present invention relates to a sheet feeding device that conveys a sheet of paper to a sheet processing section at a predetermined position.

Conventional technology: When recording information written on a type of document on microfilm, a large number of documents are stored in a stack on a document loading table, and from there one by one is transferred to the document photographing section. I am trying to feed paper. Similarly, in copying machines, facsimile machines, etc., sheet-like originals are conveyed one by one to a predetermined position by an automatic document feeder, and here the image information recorded on the original is printed on copy paper. Reading into electronic signals is done.

Japanese Patent Publication No. 5Cl-16974 discloses a device for taking out stacked printed papers one by one, and in this device, when two or more printed papers are sent out by a delivery roll, In this method, one of a pair of rolls provided on the downstream side of the delivery roll is used as a reverse separation roller to perform reverse rotation.

Problems to be Solved by the Invention An example of the problem to be solved by the invention is a sheet feeding device for recording information written on manuscripts on microfilm. There is a possibility that the document contains a document in a state where the document is in a state where the document is in a state where the document is in a state where the document is in a state where the document is in a state where the document is in a state of being closed, or a document in which sheet document documents are joined together at a portion of each edge with glue may be included. If such a document is being sorted, and the second and subsequent documents are handled using a so-called reverse sorting roll as shown in the above publication, the document will be damaged as the sorting operation progresses. You will end up being rejected.

However, if you do not use a roll for reverse handling,
If a plurality of regular original documents are fed that have not been stapled or cut, they cannot be sorted by reverse sorting.

When conveying sheets from the sheet stacking section to the sheet processing section, if multiple sheets are stapled (-J) and transported in duplicate, the sorting operation is stopped and the sheets are separated. The aim is to prevent damage.

Means for Solving the Problems In order to achieve the above object, the present invention is a sheet feeding device that conveys sheets stored in a sheet stacking section one by one to a sheet processing section, the sheet feeding device A sorting means for conveying the sheet fed out from the above-mentioned sheet toward the processing section and sorting out the electrically-transmitted sheet when a plurality of sheets are fed out in an overlapped manner, and a multi-fed sheet that is subjected to a sorting action by the sorting means. This sheet feeding apparatus has a deviation amount detection means for detecting the amount of deviation of leading edges of the sheets, and a control means for stopping the operation of the sorting means when the deviation amount is less than a predetermined value.

The sheet fed out from the sheet stacking section is subjected to a sorting action by the sorting means. Therefore, when a plurality of overlapping sheets I are fed from the sheet stacking section in a multi-fed state, the multi-fed sheets are separated by the separating means so that the leading edge of each sheet is As the handling operation progresses, it will gradually shift. If double-fed sheets are stapled to each other (1
If it is offset, the amount of deviation will be smaller than if it were not secured. If the deviation amount detection means determines that this deviation amount is less than a predetermined value,
The multi-fed sheets are determined to be mutually stopped (-1) and the sorting operation is stopped.

This avoids damage to the sheet.

Embodiments Hereinafter, illustrated embodiments of the present invention will be described in detail.

FIG. 1 shows a microfilm photographing device for photographing information written on a manuscript on microfilm. As shown in the figure, a document holding glass 11 is provided on the work table 10, and a sheet-shaped document is placed on the lower surface of the glass 11 by the document conveying device shown in FIG. It is designed to be conveyed along the line to a predetermined position. In order to accommodate a large number of stacked documents to be conveyed, a document loading table 12 is mounted on a work table 1.
It is located on the right side of 0. On this document loading table 12,
Width regulating plates 12a, which can freely move toward and away from each other: L
2b is provided.

A camera head 13 for recording information is mounted on the "Y" side of the table 10 by a support 14 attached to the work table 10.
is illuminated by an illuminator 15 mounted on a support column 4. At D, when the photographing is completed, the document is discharged to the outside through the discharge section 16. In FIG. Reference numeral 18 indicates an operation panel, and a photographing switch is arranged on the operation panel 18. Further, reference numeral 19 indicates an LED for displaying a warning.

FIG. 2 is a diagram showing a sheet feeding device, in which two rollers, a driving roller 20 and a driven roller 21, are installed below the glass 11 at a predetermined interval, and these rollers 20. An endless belt 22 is passed around the belt 21. In order to feed out the originals stacked on the original loading table 12 one by one, a feeding roller 23 is provided at -1- of the original loading table 12, and this roller 23 is movable as a column in pressure contact with the original. ing. On the downstream side of this roller 23, there is a drive roller 24a and a separating roller 2 that is in pressure contact with the drive roller 24a.
A pair of separating rollers 25 consisting of a pair of separating rollers 26 .
27 are provided. The rollers 23, 24a, 26 and 27 other than the sorting roller 24b are directly driven by a paper feed motor (not shown), and the sorting roller 24b is driven by the paper feed motor via a sorting clutch. It has become. Note that when this sorting clutch is on, the sorting roller 2 is moved by the paper feed motor.
4b is a drive roller 24. It is driven to rotate in the same direction as a, and when it is off, it is rotatable and rotates following the rotation of the drive roller 24a.

Therefore, the document sheet 1- on the document loading table 12 fed out by the feed roller 23 is transferred to the driving roller 24.
It passes between a and a separating roller 24b rotating in the same direction as the separating roller 24b, where it receives a separating action.

After being sent between the transport rollers 26 and 27, the belt 22 transports it to a predetermined position on the lower surface of the glass 11-. The information written on the manuscript is photographed at the predetermined position. After shooting, the original S is placed on the guide plate 28.2.
9, the paper ejection rollers 30, 31, and 32
．． 33 to the paper discharge tray 34 and taken out from the υ1 output section 16. In this way, the originals stacked on the 1- of the 13Q original stacking tables are continuously conveyed to a predetermined photographing position and photographed. The belt 22 and discharge rollers 30 to 33 operate at predetermined timings depending on the position of the document.

In order to detect that a plurality of original sheets have been fed out by the feeding roller 23 without being fed out in the form of a single sheet, a double feeding detection sensor 40 is installed immediately downstream of the pair of sorting rollers 25. is located. The illustrated sensor 40 is an ultrasonic wave transmitter, /11 and a wave receiver 42.
When there is no document, most of the sound waves from the wave transmitting section 41 are received by the wave receiving section 42, so that the received wave level is high. When the original comes to the 0'L position of this sensor 40,
A part of the sound wave is reflected, and the level of the received wave detected by the wave receiving unit 42 decreases.

For example, as shown in FIG. 3, the sensor 4
Assuming that it has come to the 0 position, as shown in Figure 4, the 1
A part of the sound waves transmitted through the original SO on the − side is transmitted to the original SO on the lower side.
The number of sound waves that are reflected and transmitted at the boundary with the waveguide 1 further decreases, and the level of the received wave detected by the wave receiving unit 42 further decreases.

As the double feed detection sensor 40, various types of sensors other than an ultrasonic sensor can be used.

The distance between the pair of sorting rollers 25 and the double feed detection sensor 40 is
It is set to be sufficiently shorter than the length of the original document in order to ensure that the double feeding state of the leading edge of the original document is detected at an early stage while the separating action of the sheet, ie, original document, by the pair of separating rollers 25 continues.

FIG. 5 is a characteristic diagram showing the wave reception level of the wave receiving section ]-5 when the document is located at the position of the double feed detection sensor 40. When the document has not arrived, the wave reception level is HIIlaX. It has become. On the other hand, when the first document reaches the position of the sensor 40, the received wave level is H.
When the two originals reach the (<, position of the sensor 40, the received wave level drops to H2. Therefore,
If it is detected that the received wave level has become lower than the level HX between H1 and H2, it is determined that the document has been fed multiple times.

If normal documents that are not mutually stapled are fed double, the separation roller 24. Even if the separating action by b is only 1", as shown in FIG. The paper reaches the position of the double-feed detection sensor 40 in a shifted state.If the double-feed is detected at this point, the sorting action by the sorting roller 24.b is applied to the double-feed document that has been there for at least one minute. In order to perform the sorting operation again, the sorting clutch is turned off and the other rollers 24a, 26, and 27 are reversed, as shown in FIG. 6(B).
As shown in FIG. ), the sorting operation is restarted by the sorting roller 24b and the document is fed. As a result, even if the sorting action is insufficient with just one sorting operation, by repeating this process, reliable sorting is performed and the document SO that should originally be fed is Only the paper will be fed reliably.

7(A) to 7(C) each show an example in which a plurality of documents are stapled (=J) by fIN of the stapler. FIG. 7(A) shows the conveyance of a plurality of documents S. 7(B) shows a document stapled to one end of the leading edge portion of the document by a staple N,
FIG. 7(C) shows the document secured to the other end of the edge portion by a needle N.

When such a document is fed out from the document stacking table 12 by the feed roller 23, the leading edges of the mutually stopped documents 4-1 do not shift much compared to the case shown in FIG. double feed detection sensor 4
1 will be transported to the 0 position. Therefore, if the deviation of the leading edges of the double-fed originals is less than a predetermined value L, for example, 10 mm, it is determined that stapled originals have been fed, and the separating operation by the separating roller 24b is performed. The machine stops and the warning LED 19 is turned on to alert the operator. In addition, in order to prevent the document from being damaged due to the progress of the sorting operation for the original, the separation roller pair 25 and the The distance to the feed detection sensor 40 is set to be sufficiently short.

FIG. 8(A) shows that the double-feed detection sensor 40 detects that two originals fed in a double-feed state have passed the pair of separating rollers 25 with a misalignment of the leading edge of 10 mm or less. In this case, after stopping the document feeding operation, the handling clutch is turned off and the rollers 24a, 26, 27 are turned off, as shown in FIG.
is reversed, and the original is returned to the original placing table 12. Then, the warning display LED 19 is turned on to alert the operator. However, without returning to this position, when double feeding is detected, the document may be stopped in that state and the LED 19 may be turned on.

FIG. 9 is a block diagram showing a control circuit for two consecutive sheet feeding devices. The paper feed start switch 44 and the double feed detection sensor 40 are connected to the CPU 45,
These output signals "3" are input to the CPU 45. The CPU 45 also outputs a paper feed motor 46 for driving rollers such as the feed roller 23 and the drive roller 24a.
Then, a control signal is sent to the sorting clutch 47 that transmits the drive of this motor to the sorting roller 24a, the warning LED 19, etc.

Next, the operation of the sheet feeding device will be described with reference to flowchart 1 shown in FIGS. 10(A) to 10(C). Note that these flowcharts omit the flow related to the processing described in FIG. 6 for convenience.

When it is determined in step S1 that the operator has turned on the paper feed start switch 44 to start the paper feeding operation, the paper feed motor 46 is turned on in step S2. This causes the feed roller 23 and other rollers 24a, 26, and 27 to rotate. Next, step S3
Then, the sorting clutch 47 is turned on, and the sorting roller 24b
is driven as shown in step S4 to drive the drive roller 24.
Rotate in the same direction as a. In other words, the sorting roller 24b rotates in the direction of sorting the document. Then, timer T1 is started in step S5. The value of this timer T1 is set based on the assumption of the time from when paper feeding is started by the feed roller 23 until the leading edge of the document reaches the position of the double feed detection sensor 40. Therefore, if the determination in step S6 is No, that is, the document has not reached the position of the double feed detection sensor 40, and it is determined in step S7 that the timer TI has timed up, this means that the paper feeding operation by the feed roller 23 is This means that it has not been done properly, and the jam processing subroutine of step S8 is executed.

On the other hand, if it is determined in step S6 that the received wave level value of the double feed detection 4 sensor 40 has become lower than HmaX, it means that the leading edge of the document has reached the position of this sensor 40. Ste...Start timer T2 with knob S9. This timer T2 is a timer for determining that the amount of deviation of the leading edge of a plurality of double-fed documents is less than the set value of 10 mm, and the timer value is set to L/V. Here V
(mm/sec) is the document conveyance speed. Therefore, it is determined in step SIO that the received wave level of the double feed detection sensor 40 is below HX when a stapled document is fed as shown in FIG.
Step S], the document check processing subroutine 1 is executed.

If NO is determined in step SIO and time-up of the timer 12 is detected in step S12, it means that only one document was fed under normal conditions, and the document is transported in step S813. The original is conveyed to a predetermined position by rollers 26, 27 and bells I and 22.

It is confirmed that the Dn document has been conveyed to a predetermined position by a sensor 5 (not shown) or the like.
If the judgment is made in step S], 4, the conveyance is stopped in step S]5, and the paper feeding operation is completed.

FIG. 10(B) is step S8 in FIG. 10(A).
This is a flowchart 1 showing a jam processing subroutine. If it is determined in step S7 that the timer T1 has timed up, the operation of the paper feed motor 46 is stopped and the feed roller 23 is stopped in step S16. Then, in step S17, the disengagement clutch 47 is turned off, and the display section provided on the operation panel 17 is displayed in step S17.
18 displays the document jam.

Figure 10(C) is step 5 in Figure 1-0(A)
This is a flowchart 1. showing the document check processing subroutine of 1-1. As shown in step 51-9, S
By executing step S20, the multiple sheets of originals that are mutually stopped (-J) are prevented from being damaged (and the handling operation is interrupted. Thereafter, in step S21, the feeding roller 23
is moved to the retracted position to release the pressure contact between the document and the feed roller 23.

6. Then, in step S22, the paper feed motor 46 is reversed to reverse the separation roller pair 25 for a predetermined period of time. At this time, due to the rotation of the drive roller 24a,
The sorting roller 24b rotates following the drive roller 24a. The driving time is set to the time required for the original to be returned to the original placing table 12. Then, in order to indicate that the fed document has been stapled, for example, a document check message is illuminated on the display section in step 823.

Next, a sheet feeding device in a second embodiment will be explained.

-1- In the case described above, when the stapled originals pass the separating roller pair 25, the double-fed originals are mainly displaced only in the transport direction.

This occurs when the document is relatively thick and the width regulating plate 12
12a and 12b are provided on the document table 12, it is unlikely that double-fed documents will be skewed due to the operation of the separating roller 24b.

However, if the document is relatively thin and one end of the edge portion of the document is stapled, the 3111 plates 12a and 12b for the width are attached, and the document itself has no stiffness. When passing through the pair of rollers 25, the document will be skewed.

In order to prevent damage to the double-fed originals even in the case that the double-fed originals are skewed due to the sorting operation of the pair of separating rollers 25, an ITi' feed detection invoice sensor is installed as shown in FIG. A skew detection sensor 5] and 52 are provided on the stream side 40 and the downstream side. As shown in FIG. 9, these skew detection sensors 51 and 52 are connected to C
Connected to PU45. 1, i: The 1-line detection sensor 51 consists of two sensors 51a that are separated by a predetermined position in the width direction with the position of the double feed detection sensor 40 as the center,
51b. Similarly, the other skew detection sensor 52 has two sensors 52a and 52b.

Next, regarding the operating state of the sheet feeding device according to the second embodiment, the W side view shown in FIGS. B) This will be explained with reference to the flowchart shown in 8. Furthermore, the first
FIG. 1(A) shows a case where staples are attached to the left end of the leading edge of the document in the conveying direction, and FIG. 11(B) shows a case where staples are attached to the right end of the document in the conveying direction. In addition, the flowchart 1 shown in FIGS. 12 (A) and (B), the first
0 (A), (B), and (C), the flow related to the processing explained in FIG. 6 is omitted for convenience.

Step S of each step shown in FIG. 12(A)
31 to 342 are steps S1 in FIG. 10(A).
to 812.

In this embodiment, as shown in FIG. 12(B), the skew sensor 51a is always operated until the timer T2 times up.
The on/off status of 52b is monitored in steps 844 to S47, and if a time has elapsed, a flag F1 indicating this is set in step 843. Skew sensor 52
If a is turned on and the skew sensor 51b is turned off, this corresponds to the case where the document is skewed in the state shown in FIG. 1 (B), and NO is determined in step S45. Then, the document check process shown in step S50 is executed. This process is similar to step Sll in the embodiment described above. If the double-feed original is skewed in the direction shown in FIG. 11(A), the original check process S51 is executed through steps S46 and S47.

If the document is fed normally without being skewed, the process continues until the flag F1 is set in step 843, that is,
The judgments from step S40 onward are repeated through steps 848 and S49 until it is confirmed that the leading edges of the double-fed originals are not more than a predetermined value L1, for example, 10 mm, and the originals are kept at the predetermined position through steps 352 to S54. Paper is fed to the position.

In the illustrated embodiment, a timer is used to determine the amount of deviation, but it is also possible to detect the amount of deviation by arranging a plurality of double feed detection sensors in the conveyance direction. In addition, in the illustrated embodiment, the sorting operation is performed for all sheets 0 fed from the sheet stacking section, but the sheet handling operation is performed only for sheets for which double feeding is detected by the double feeding detection sensor. The sorting operation may be performed after reversing a predetermined distance. In that case, another double feed detection sensor may be added in front of the pair of separating rollers, and the separating operation may be performed only for the sheet for which double feeding is detected.

Effects of the Invention As described in 1-, the present invention provides that when a plurality of sheets are fed in a state where they are stapled (-J), they are fixed at the initial stage of the sorting operation. This can be detected and by stopping the handling operation, damage to the sheet can be prevented.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a microfilm photographing device incorporating a sheet feeding device, Fig. 2 is a sectional view showing a sheet feeding device incorporated in the photographing device shown in Fig. 1, and Fig. 3 shows two sheets. Fig. 4 is a schematic cross-sectional view showing the state in which the ultrasonic waves of the double feed detection sensor are transmitted, and Fig. 5 is the cross-sectional view of the double feed detection sensor. 6(A) to 6(C) are process diagrams showing the state in which a plurality of sheet-like originals are being handled, and FIG. 7( A) to FIG. 7(C) are plan views showing the state in which sheet-like originals are stapled, and FIG. 8(A)
8(B) is a process diagram showing the operating state of the sheet feeding device when a stapled document is fed, FIG. 9 is a block diagram showing the control circuit of the sheet feeding device, and FIG. Figures (A) to 10 (C) are flowcharts showing the operating states of the sheet feeding device, and Figures 11 (A) and 11 (B) show the state in which a stapled document is skewed. +2 side view, Figure 12 (A) and Figure 12 (B)
is a flowchart 1 showing the operating state of the sea river supply device according to the second embodiment. 10...Work table, 11...Glass, 12...
・Document 2 loading table, 23...feeding roller, 24,a...drive port, 24b...separating roller, 25...separating roller pair, 26. 27... Conveyance roller, 41] Double feed detection sensor

Claims (1)

[Scope of Claims] A sheet feeding device that conveys sheets stored in a sheet stacking section one by one to a sheet processing section, the sheet feeding device conveying sheets fed out from the sheet stacking section toward the sheet processing section. At the same time, when a plurality of sheets are fed out in an overlapping manner, a sorting means for sorting the double-fed sheets, and a deviation amount detection means for detecting the amount of deviation of the leading edges of the multi-fed sheets that are subjected to the sorting action by the sorting means. and a control means for stopping the operation of the sorting means when the amount of deviation is less than or equal to a predetermined value.