JPS6082554A - Sheet feeder - Google Patents

Abstract

PURPOSE:To reliably perform separating operation by stopping a sheaf of sheets on a placing table with a stopper before the sheaf of sheets is fed to a separating portion and vertically vibrating the sheaf of sheets to loosen the sheets. CONSTITUTION:A sheet feed belt 3 is disposed on the inclined downward end of an inclined document placing table 1 of a both-sided document circulating apparaus, and a separation belt 5 is disposed at a position opposite to the upper side of the belt 3. A stopper 26 for keeping the document away from advancing into the feed felt 3 is disposed in such a manner as to freely move up and down on this die of a driven shaft 2a of the feed belt on the placing talbe 1, and a semi-circular roller 25 for assisting feeding of a document is disposed on this side of the stopper 26. When the sheaf of documents is set on the placing table 1, the stopper 26 is located at its lower position, and the semicircular roller 25 is rotated during a fixed time to loosen the sheaf of documents. After that, the stopper 26 is lifted up to start separating and feeding the documents.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a sheet feeding device that separates and feeds sheets such as originals one by one from a mounting table.

(Conventional technology) 2. Description of the Related Art Conventionally, there is a document feeding device as a device of this type.

This process separates the originals one by one from the stack of originals placed on the original table.
When feeding, for example, the separation belts are placed in upper and lower λ pairs opposite each other,
By operating the lower belt in the feeding direction and operating the upper belt in the opposite direction, the lower belt will feed only one document out of multiple documents that are about to enter, and the upper belt will feed only one document. It is known that originals are fed by attempting to return originals other than the original. However, if the manuscripts are in close contact with each other for some reason, the above method cannot separate them.

(Objective) It is an object of the present invention to provide a sheet feeding device that eliminates the above-mentioned conventional drawbacks and performs reliable separation and feeding.

(Summary) The present invention provides a sheet feeding device that separates and feeds sheets such as originals one by one from a loading table, and includes a blocking means for preventing a bundle of sheets placed on the loading table from entering a separation section in advance. The apparatus includes means for applying vibration to a bundle of sheets, and control means for operating the blocking means and the means for applying vibration for a predetermined period of time.

(Explanation of the embodiment) A detailed explanation will be given below based on the drawings. FIG. 7 is a longitudinal cross-sectional view showing a schematic configuration of a double-sided original circulation device C-example, which is an embodiment of the present invention.

Reference numeral 1 denotes a document mounting table, ko a paper feed belt drive shaft, and ko a a paper feed belt driven shaft, between which the paper feed belt 3 is placed and rotates in the direction of arrow C in the figure. G is the separation belt drive shaft, Qa is the separation belt driven shaft, and the separation belt is in between! ; A plurality of sheet-like originals placed on the original platen/s by the paper feed belt 3 and separation belt s, which are tilted and rotating in the direction of the arrow in the figure, are loaded seven sheets at a time from the bottom. To separate. t is a conveyance roller, and Aa and Ab are rollers that are in pressure contact with the conveyance roller 6, respectively. Also, wa...
10. // is also a transport roller.

9a, /θa, //a are conveyance rollers 9. /θl
It is a roller that comes into pressure contact with /. In addition, 7 is a platen glass disposed on the top plate of the main housing of the copying machine, and a conveyor belt driving roller is located near the left side of l, and 7a is a platen glass/a conveyor belt driving roller is placed near the right side of g. There is.

The lower surface of this hanging bell 1-ff faces or contacts the upper surface of the platen glass/2 in close proximity. Also, 73
Reference numerals 1 to 7 are reflective optical sensors that detect the leading edge or trailing edge of a document, which are disposed at required locations on the document circulation path (paper path). In addition, 20 is a document placement table/the document placed on it is placed on the document table 1.
Reflective optical sensor ES, /? is a reflective sensor (recycling sensor) R8 that detects the circulation of a stack of originals.
and the partition arm, 2.2 is a recycled motor tacho/
At that point, the recycle sensor RB, /9 is turned on, and the original is fed separately from the lowest original. When the rear end of the final original passes through the partition arm 22, the partition arm 2λ is moved by its own weight. Recycle sensor R8,/
? The mechanism is such that it is turned off when the position is removed.

In particular, there is a member (hereinafter referred to as a stopper) 26 on the front side of the paper feed belt driven shaft 2a on the document table/top that prevents the document from entering the feed belt 3; If it is not placed, it will be lowered to a position where it will be in contact with the document mounting table l, and when JJX 8 will start its approach, it will be placed in a position where there will be a gap between it and the document mounting table l so that the document can pass through. Move up and down in the direction of the arrow as if raising it ◇Furthermore, on the front side of the stopper, f, and 24, there is a roller (hereinafter referred to as a half-moon roller) that has a part whose continuous curved surface is interrupted to supplementally feed the original. 25, which is driven in the same direction as the paper feed belt driven shaft ja, as shown by the arrow.

In the present invention, the stopper roller is lowered when the document is set on the document table l, and prevents the document from entering, while the half-moon roller 2 on the left rotates for a certain period of time to perform a sorting operation on the document. By raising the stopper 2A, the document is allowed to enter the paper feed belt driven shaft 2a, thereby ensuring reliable feeding of the document. Also,
The state in which the stopper a6 is once raised continues as long as the document is set on the document table, and only the stopper 2 is lowered when the document is removed by the operator.

FIG. 1 is a schematic cross-sectional rear view showing the drive section. In the figure, go is motor M, 2, 1! ; / is a motor gear with a gear on the paper feed belt drive shaft and the separation belt drive shaft? 'A
The driving force is transmitted through the

t2 is a motor M/, g3 is a motor pulley, g is a two-stage pulley, and transmits the drive from the belt 8 near to the belt j. Also, g? The belt 90 transmits the driving force from the belt gε to the belt 90, thereby constantly transmitting the driving force to the drive roller 7 of the conveyor belt g through the pulley q/. Also, q3 is a stage boo +) g q
and/body rotated notch groove q11. The amount of movement of the belt r can be detected by the photoelectric sensor 95. The octopus is an electromagnetic brake BK, and by turning it on, it is possible to stop the bell 11 instantly.

Also, q7 is a gear for motor M3.9, 99 is a pulley, 1
00, 10/, /θ are belts, conveyor rollers A, 9
,10. The driving force is transmitted to /l.

Also, 103 is Boo IJ q? Notch groove l rotated as one unit with
It is a disc with θ da, and the photoelectric sensor 10S detects the transport rollers A, ? , 10. It is possible to detect the amount of rotation of //, that is, the amount of conveyance movement of the document.

Reference numeral 1.23 is a switching claw that moves the original on the platen glass/2 to the transport roller 6 or the transport roller? A tension spring 24t and a solenoid S are used to switch the direction of conveyance.
This is done using I, , /θ7.

Half-moon roller, 2! r is driven by a paper feed belt driven by the shaft 2g of Ua, a half-moon roller via a belt 29, 2. It is transmitted to the drive shaft 2gts of the motor M, 2gts. f
Driven by θ. Further, the vertical movement of the stopper 2B is performed by a solenoid SL (hereinafter referred to as the stopper SL), 27, and when the stopper EIL27 is turned on, the stopper 26
goes up and off! It will descend to the original table L using its own weight.

Next, the operation of the double-sided document circulating device will be explained.

(1) Single-sided original copying In FIG. 1, a plurality of sheet-like single-sided originals with the page order aligned are placed on the original placing table l with the first page facing upward.

The placed originals are stopped by a stopper 2B and separated by a half-moon roller 25, and then the stopper 6 is lifted up, and then separated and fed one by one from the bottom by the paper feed belt 3 and separation belt 5. The fed original passes through a paper path air a and is sent onto a platen glass/2 by a conveyor belt r with the image surface of the original facing downward. When the trailing edge of the document is detected by sensor S, 2°/4t,
From that point on, disk q, ? (Fig. 1) starts counting the number of notched grooves 9'l, and after counting the predetermined count, motor M/.

Turn off t2, electromagnetic brake BK, ? - is turned on, and the rotational drive of the conveyor belt g is stopped instantly.

As a result, the original is placed on the platen glass 72 surface 0J)Pfr
It automatically enters the positioning set state at the specified position.

When the original is positioned on the platen glass 12 in this manner, the copying operation is started, seven exposure scans are performed, and the copied copy paper is stored in a paper discharge tray (not shown). After the exposure of the original is completed, the exposed original is ejected through paper paths (a) and (%'la). At the same time, the next original is fed in parallel by the above-described operation and positioned and set on the platen glass 7.2.

This parallel operation is simply an operation of circulating the originals, and the reversal of the originals is not performed on the previous or next original during the process, so it is called a normal discharging and normal feeding operation. Then, the normal feeding, discharging, and feeding operations are performed sequentially, and one cycle of the set originals is recycled by the sensor R8, /? The end of circulation is sent to the copying machine and the number of copies is counted. The above operation is repeated until the set number of copies is reached, and the required number of copies is stored in the output tray (not shown) of the copying machine.

(11) Double-Sided Original Copying If there are three originals on the original table, the originals placed on the document table will be in the page order as shown in Figure 3, and the document placement state after copying is complete. The state will be the same as when it was first set as shown in Fig. 3. Explain their operation.

First, the j-th, A-page original is conveyed to above platen glass/2. Then motor M/, gλ, M, ? , 9ri (Figure 2)
is reversed and at the same time solenoid BL and 107 are turned off, the paper ejection route is switched, and the original is transferred to the paper path L.
a, ■a, and is held by conveyance rollers 9, 9FL and conveyed. sensor sll.

/A detects the rear edge of the document, motors M3, 9'
/ is stopped. Then, after a certain period of time has elapsed, the motor M, 3.
97 is rotated in the normal direction, and the original is in the paper path vi.

vta, and transport rollers 10, 10a, //, //a
transported by. When sensor F3jt,/7 detects the trailing edge of the document, motor M3, 97 is stopped, and after a certain period of time, motor M3*97 is reversed again, and motors M, g, Z is rotated forward and solenoid F3
L and 10 are turned on, and the original passes through the paper path ■a, and the belt g
It is held in its mouth and transported. And sensor S3. When the trailing edge of the document is detected by /k, the disk? 3(
Start counting the number of notched grooves (Fig. 2), and after counting the predetermined count, the motor M/, j! :, 2 are turned off, and furthermore, the electromagnetic brakes BK, 9J are turned on, the rotational drive of the conveyor belt g is instantaneously stopped, and the original is set. As described above, the paper feeding operation in which the original on the document mounting table is set on the platen glass 12 while being inverted, that is, the inverted paper feeding operation (hereinafter referred to as the counterfeeding operation) is first performed.

Then, the copying machine starts copying the 6th page of the original,
Seven exposure scans are started, and the copied copy paper is stored in a paper discharge tray (not shown). After the exposure of the original is completed, the second page of the exposed original is repeatedly moved through the paper paths IaJlV&, ValVIal■a in order to position and set the second page of the original on the platen glass 1.2 with the original page facing downward. This operation is hereinafter referred to as a repeating operation).

After that, the copying machine starts copying the S negative side of the original,
Store the copy paper in a paper output tray (not shown).

After the exposure of the S-negative original is completed, the original on the platen glass /2 passes through the paper paths ■a and ■a and is placed on the original placed on the original placing table l by the transport rollers // and //. The third page is ejected facing upward (this operation is hereinafter referred to as exclusion operation). From a certain time during this exclusion operation, the above-mentioned counter-feeding operation of the next original with pages 1 and 3 is performed in parallel with the exclusion operation, and the page 3 is positioned on the platen glass/2 with the 3rd page facing downward. (This operation in which the exclusion operation and counterfeeding operation are performed in parallel is hereinafter referred to as positive exclusion and counterfeeding operation). After that, the above-mentioned copying operation is carried out as many times as necessary, and the final thing is that the copy paper is arranged in the same page order and placed in a paper output tray (not shown).
The original is also discharged onto the original placing table l without changing the initial set state as shown in FIG. 3, and copying from the double-sided original is completed.

FIG. 9 is a schematic control circuit for performing the above-described sequence operation.

In the figure, it is mainly composed of a well-known one-chip microcomputer (hereinafter referred to as a microcomputer) lλO with built-in ROM, RAM, etc., and each sensor signal is input to the input port E of the microcomputer/-〇, ~ input, interrupt terminal i'NT/, 1NTJ □ is sensor ioh
Transport lock and hit sensor output from B Oy t
A belt clock signal output from r is input.

On the other hand, microcontroller/10 output ports 01 to 0. Drivers D1 to Dcl are connected to the driver DI.
Each load can be driven via Q-DQ. From output ports o4 p o6, transport motor M, ? ,? M3FWD, M3RF, and V are outputted so that 7 can be rotated in the forward and reverse directions, and the configuration is such that they can be rotated in the directions of arrows → and -, respectively in FIG.

Also, belt motor M/ is connected to output ports 02 and 03.

The configuration is such that M/FWD and M/RBV are output so that g2 can be rotated in the forward and reverse directions, and rotated in the directions of arrows → and -♦ in FIG. 1, respectively.

The configuration is such that the recycle motor RM is driven from the output port 01 via the driver DI.

Stopper 5L is connected to output port 09 via driver D.
27.

In addition, the I10 terminal of the microcomputer/10 is connected to the main body of the copying machine, and receives the above-mentioned copying operation start signal, original exposure end signal,
It sends and receives signals such as the completion of one cycle of the original, and matches the operations of the double-sided original circulating device and the copying machine main body. Reading these signals and turning on/off the load is done by a microcontroller.

It is controlled according to a program stored in the internal ROM.

Next, the operation of the double-sided document circulating device (hereinafter referred to as RDF) of the present invention will be explained using the general flowchart shown in FIG. g51A and the detailed flowcharts shown in FIGS. 7 to 77.

FIG. S is a general flowchart of a single-sided original copying operation, and FIG. 6 is a general flowchart 1 of a double-sided original copying operation. In FIG. 3, the single-sided original copying operation is first performed by processing SUB (5toplOθ), which will be described later.
Executing the normal feeding 5UB (5 top/00), one original is separated from the original stack placed on the original placing table L, is fed, passes through the transport paths 1a to lla (Fig. 1), and is placed on the platen glass of the copying machine. /2, and then sends a copying operation start signal to the copying machine main body, and the copying machine starts copying and starts exposure. On the other hand, in order to detect one circulation of the document bundle, the RDP starts running the recycling SUB.
op jθO) Stop the rotation of the partition arm 2.2 to the east of the original and wait until the exposure of the copying machine body is completed (stθpao
o). At the end of exposure, exclusion 5UB (stop
300) is executed, and the original on the platen glass/2 side passes through the transport paths 1a to 1a to 2a and is stacked again on the upper side of the partition arm 2 on the east side of the original placed on the original placing table. After that, this operation is repeated and recycled 5UB (st
Op! 00), when the partition arm 2- falls from the original due to its own weight, it notifies the copying machine that one cycle of the original has been completed, and the operation ends, and as a result, a set of copies is completed on the output tray of the copying machine. do.

On the other hand, in Figure 6, the double-sided original copying operation is first done at 5U.
B (citep AOθ), regular salary 5UB (stop 1
00) and repeat 5UB (stop y-oo) to move the original from the original table to the transport paths Ia to 1la-1a.
~■a~Va~■a~■a-1a, and is stopped at a predetermined position on the platen glass 7j. At this time, the document mounting table l
The copying machine is installed so that the back side of the surface placed on the platen glass 12 faces the platen glass 12 side, and the copying machine main body is instructed to copy the back side of the original at 5top and 2θ0.

Next, when the exposure of the copying operation is completed, the 5UB (5
step 4tθO) and move the original to the transport path IIfL~■
Pass through a~■a-va-v1a~■a-1a, stop at a predetermined position on the platen glass platen again, and this time place the document so that the front side is on the platen glass/2 side, and
OP command θO commands the copying machine to perform the surface copying operation of the original, and at the same time, the recycling SUB accompanies it so that the partition arm here stops rotating above the original (θtepsoo).
) At the end of exposure of this copying operation, exclusion 5UB (stop
, to θ), and the original is returned to the upper side of the partition arm 22 of the original placing table in the same state as before the original was circulated on both sides. Thereafter, this operation is repeated, and one copy set is completed at the end of the above-mentioned cycle.

Next, the operations executed by each SU]3 will be explained in detail. In Fig. 7, the execution of processing SUB is
The entrance document sensor B8.2θ detects whether a stack of documents is placed on top of the document, and if there is no document, the stopper SL,
2? is turned off and the stopper 26 is lowered. (5top
60/) When the operator places the original, the next sto
The process advances to p, where it is detected whether the stopper SL, 27 is on, that is, whether the stopper 26 is raised. If it is on, since the stopper roller is raised, it is determined that the document has already been separated and conveyed, and the handling operation is not performed, and the process advances to the next 5top to perform the handling operation only when it is off (5top10λ). At this point, the document is stopped by the stopper 6, and the separation motors Mu and g□ are turned on, and the knife roller λ! is rotated, and after a predetermined period of time has elapsed according to the timer, the stopper 5L27 is turned on to raise the stopper 6, and the document enters the separating section (5tep 603).

The original is moved up and down by the half-moon roller, 2.5-, and the main operation of handling the original is performed by creating a state where the original is squeezed, the edges of the original are bent, and the originals are brought into close contact with each other. Force) Re-Empty Node Force 5 people @ Cr 100% Improves the separation of the original tone.

In Figure 1, the execution of the regular pay SUB is the same as the above-mentioned judgment SUB.
By executing
In order to separate one document from the lower side from a stack of documents placed on
Wait until the leading edge of the document arrives at paper feed sensors B/, /3 located upstream of (5top 10/).The separated documents are transferred to transport path 1 by transport roller A and APL when the leading edge arrives.
Transport motor M, ? to send to a? ,? ? Turn on the FWD and rotate the conveyance roller 6.6a in the direction of the solid line arrow, and the paper feed sensors S, 2. Wait until the leading edge of the document arrives at /9 (
5 top 10). Even if the document is normally fed into the conveyance path upon arrival at the leading edge, the separation motor M2. gO is turned off, and the conveyance path [a
Belt drive motor M/FWD to send to... , 2 is turned on and the belt roller 7 is rotated in the direction of the arrow →, and when the leading edge of the document is fed into the belt and curled, the above-mentioned paper feed sensor S2. , /'I waits until the trailing edge of the document is detected (5top /θ3). When the paper feed sensor S, 2°/g detects the trailing edge of the original, the original is placed on the platen glass l-
In order to stop at a predetermined position above, a resist counter (RGCN) operated by the clock of the photoelectric sensor
/), and the photoelectric sensor BC, 9 & mentioned above starts /).
Every time a clock is input, it counts [RGON/) and waits until (RGCN/, l is completed)
op /θ4t). Assuming that the original has arrived near the predetermined position on the platen glass l- at the end of [Just GON /),
At the same time as the electromagnetic brake BK, 92 is turned on, the belt drive motor M/FWD, [2 is turned off, and the belt drive is stopped instantly, allowing accurate positioning of the document. Further, the drive of the transport motor M3.97 is also stopped when MJFWD and 97 are turned off.

This operation ensures that one document is placed on the platen glass 12.
It will stop at the specified position above.

On the other hand, in order to execute the flip-back SUB in Figure 9, first, in order to send the document on the platen glass 12 to the transport paths 1a to 1a, turn off the switching solenoids sL and IO, lift the switching claw 3, and switch the transport path. Next, in order to rotate the belt roller 7 in the direction of the dotted arrow, the belt drive motor M/
R.B.V.

g2, and then turn on the conveyance motor M, 3.97 to rotate the conveyance rollers 9, 9a in the direction of the dotted arrow, that is, M,? Turn on REV. Document ζ transport path 1a to I
Reversing sensor 11. Conveyance continues until /4 detects the trailing edge of the document (dayteplIO/). At the time of detecting the rear end, that is, the belt drive motor Ml, 12 and the conveyance monitor M, ? ,? 7 should be turned off (M/RF!V, t2
-1r7,M,7RKV,q? When the document is turned off, the document is supported by the conveyance rollers 9 and 9a, and the rear end of the document is numbered or reversed by the reversal sensor 84. /
It is located between A and transport rollers q and d, and the standby interknoll timer is open and stopped (
5top qo2). Next, in order to reverse the conveyance direction of the document and send it through the conveyance path ■a~vrai, the conveyance roller roller q
a and 10,10FL, //.

Transfer motor M3 to rotate /leL in the direction of the solid arrow.
．． Turn on q7, that is, turn on MJFWD and Tough, and when the document enters ■a from the conveyance path va, the reversal sensor S! f
, /'/ continues to feed the document until it detects the trailing edge of the document (
5top lIθ3). At the time when the trailing edge is detected, in order to turn off the transport motor MJ and the differential, the MJp transport FWD is turned off, and the document is moved to the transport rollers lθ and ioa.

// , //lL, and the rear end is a reversal sensor F
3! ;, /7 and conveyance roller 10. The interval timer is in a state between 1 and 2, and the interval timer is open and stopped (5top 'IO'l).

Next, the conveyance rollers 10 and 10a are used to reverse the conveyance direction of the document again and send it to the conveyance path (a-1a).

// , //FL, A, At) in the direction of the dotted arrow, turn on the conveyance motor M3.97, that is, M3 R
The belt drive motor M/FWD turns on the EV and further rotates the belt roller 7 in the direction of the solid arrow.

Turn on g and 2. When the leading edge of the document is fed into the belt g, the paper ejection sensor 83. /! Wait until the rear end is detected (stop 1los)
.

When the trailing edge is detected, the original is removed from the platen glass/coller, medium-sized booklet with small surface, lr pile, lnasner screwdriver, and S cyst counter (
RGCN] and photoelectric sensor? The clock pulse (RGCIJ2) ends with the clock pulse of j (5tep qob). (RGCN, 2) At the end, the document has arrived near the predetermined position on the platen glass 12, and at the same time, the electromagnetic brake BK, 9.2 is turned on, and at the same time, the belt drive motor M/FWD mentioned above is turned on.

By turning off g2, the drive of belt g is stopped instantaneously, allowing accurate positioning of the document. In addition, the drive of the transport motors M3 and M9 is also carried out by M3. It stops when q7RFiV is turned off, and the switching solenoid SL and 107 are also turned off. This operation ensures that the document is turned over on the platen glass 7.2.
It will stop at the specified position above.

In Fig. 1θ, when the exclusion SUB is executed, the belt roller 7 is rotated in the direction of the dotted arrow in order to send the document on the platen glass/2 to the conveyance paths ■a to ■a.
Turn on belt drive motor M/REV, g2, and then turn on conveyor rollers A, Ab, 10, 10fL//, //EL
The conveyance motor M3 is rotated in the direction of the arrow →.
97 is turned on, that is, M, 7FWD is turned on, and solenoid SL and /θ7 are turned on. When the document enters the conveyance path ■a, the paper discharge sensor B3. Wait until /k detects the trailing edge of the document (step 30/).

When the trailing edge is detected, the paper discharge counter (F!JON) is started and the clock output of the photoelectric sensor lO5 is counted until the end of (E, TCN) (5tep, 302). (gJcn)
), the document is removed from the conveyance roller //, //eL and returned to the upper side of the document stack on the document placement table/, and the drive is stopped as M, 7FWD, Dare off M/RFiV off, Paper ejection ends (5top 303
).

In addition, in Fig. 11, the recycle SUB is executed by first stopping the original at a predetermined position on the platen glass 7.2, and then applying a pulse to stop the partition arm from rotating above the remaining original bundle on the original placing table. Motor, 2/1
When the original (rotate (step jθ)) completes one cycle, the partition arm 22 falls under its own weight, and the recycle sensor R
8, it detects that /q is turned on and outputs a /circulation end signal to the copying machine (θtep jθ).

In this embodiment, an original is used as an example of a sheet, but the invention is not limited to this. For example, it can be applied to copy paper, etc.

(Effects) As explained above, before sending the sheet bundle to the separating section, the sheet bundle on the loading table is blocked with a stopper, and the half-moon roller is rotated for a certain period of time to give vertical vibration to the sheet bundle. By separating the sheets, it has the effect of weakening the adhesion between the sheets.
This has the effect of ensuring the separation operation.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a double-sided original circulation device that implements the present invention, FIG. 1 is a cross-sectional rear view showing the drive unit, FIG. 3 is a side view showing the document placement state, and FIG. 7 is a control The circuit diagram, FIGS. 5 and 6 are general flowcharts, and FIGS. 7 to 77 are detailed flowcharts. /e・Document platen・・Belt /+21・Platen glass 14t・・Paper feed sensor Sλ 25・・Half moon roller Yu6@Φ stopper Nige@Fist stopper SL 21・・
・Axis λde・Fist belt/20・・Microcomputer. Patent applicant Canon Co., Ltd. Japan Seimitsu Kogyo Co., Ltd. Agent Arai -be

Claims (1)

[Claims] (l) In a sheet feeding device that separates and feeds sheets one by one from a bundle of sheets placed on a placing table, means for preventing the sheets placed on the placing table from entering the means for separating and feeding; A sheet feeding device 0 comprising means for applying vibration to a sheet bundle, and a control device for operating the blocking means and the vibration applying means for a certain period of time before the sheets are separated and fed from the placing table.