JPS61267631A - Automatic paper feeding device - Google Patents

Abstract

PURPOSE:To improve the separation performance remarkably by providing an automatic paper separation feeding device based on a bottom feeding method with a sheet feeding member, two frictional members, and a sheet stopper which controls the closing motion of a sheet conveying path. CONSTITUTION:No.1 paper feeding rollers 2 and 3 are provided for a sheet placing table 1. A separation device 10 is composed of a separation conveying belt 13 for feeding a sheet, a separating blade 14 which comes in contact with the outer circumferential surface of the above said separation conveying belt 13 with pressure, a separation roller 15 which is located above and comes in contact with the separation conveying belt 13 with pressure, a sheet stopper 16, No.2 feeding rollers 17 and 18, and of a guide plate 19. The sheet stopper 16 is retracted from the conveying surface for a sheet S1, as long as the separation roller 15 is functioning the friction separating action while it touches the separation conveying belt 13 with pressure. On the contrary, when the separation roller 15 is released from touching the conveying belt 13 with pressure so as to effect the sheet conveying operation, the sheet stopper 16 is relocated to a position where a group of sheets other than the sheet S1 is suspended.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a sheet conveying device, and more particularly, sheets for feeding are placed in a stacked manner on a sheet mounting table, and the sheets fed out from the bottom layer of the stacked sheets are separated! This invention relates to an automatic paper feeder that separates and feeds sheets one by one depending on the position.

[Jumei technology]

Generally, when making multiple copies of a document consisting of multiple sheets of manuscript paper or copy paper (hereinafter referred to as "sheets"), first, place the first sheet on the manuscript table and make a predetermined number of copies, then copy the first sheet. In place of the second sheet, a second sheet is placed on the document table and a predetermined number of copies are made, and in the same manner, all the sheets are placed one by one on the document table and a predetermined number of copies are made. Sort the copies with the second sheet copied one by one into separate positions, stack the copies with the second sheet on top of them one by one, and then do the same to make all the copies one by one. Stack multiple documents one after another! However, such work is extremely complicated and time-consuming. For this reason, sorters (automatic sorting devices) have been commercialized as devices that automatically sort the copies one by one, but sorters require a lot of effort to sort 20 or 30 or more copies. This was indispensable, and it took time and effort to take out the documents sorted into 1s units from their respective stacking positions. Recently, when documents consisting of multiple sheets are set in a stack, insects can easily transport the first sheet onto the document table, copy only one copy, and then return it to the original stack position. Next, transport the second sheet onto the document table, copy one copy, then return it to the original document stacking position, copy all the sheets one by one in the same way, and then copy the original document. For example, there was a device developed by Tokuko Showa that returned the document to its stacking position to make only one copy of the entire number of documents, and then continued to repeat the above operation to make a predetermined number of copies of the document. 50-34
Various proposals have been made in Japanese Patent Publication No. 416, Japanese Utility Model Application Publication No. 51-55445 and its full text, Japanese Patent Publication No. 55-27343, Japanese Patent Publication No. 56-37536, etc. However, in this type of device, the following matters must be ensured. That is, (1) To reliably separate the sheets one by one from the stacked ILs and send them out. This is because if two or more sheets are fed multiple times, some copies of the document will be missing. (2) Correctly convey the sheet separated from the document to a predetermined position on the document table. This is because if the sheet is not placed in the correct position on the document table, correct copying will not be possible, and parts of the document may be missing or
This is because a slanted copy may be created. (3) Each sheet of the document must not be damaged, such as wrinkles or tears. This is especially important when there is no backup of the manuscript. (4) Correctly return the copied sheet to the original document stack position. This is because if the sheet is not correctly returned to its original document stacking position, it will interfere with subsequent preparation for copying. (5) Regardless of the size or thickness of the sheets to be copied, each operation such as conveyance, copying, and return to the original stacking position must be performed reliably. This is because sheets constituting a document may include sheets of different sizes and thicknesses. Of the above-mentioned items, particularly in relation to (1), various devices have been proposed in the past for separating documents on the document table of a multi-slip device one by one and feeding them onto the document table. FIG. 15 is a list diagram schematically showing various sheet separation methods in the prior art. All of these methods refer to a bottom-feed separation feeding method in which sheets are separated and fed one by one from the bottom layer of a stack of sheets, and sheets can be easily added even during paper feeding, and the feeding speed increases. Afterwards, they will be arranged again in page order. 15th Il! l(A)gtma*@I4 Toshi)
This is a method of separating and feeding sheets by utilizing the difference between d) ll, ffhl, and f), and can be further divided into the following six types of specific examples. This is a friction member separation method, in which a friction member made of a synthetic rubber plate is pressed into contact with a feed roller F, which is usually made of sponge rubber, and the difference in the coefficient of friction between the feed roller 2F and the friction member is used to generate the sea) S. Of these, the lowest layer (Sheet) So is separated and fed. This method has a simple mechanism configuration, but the weight of the stacked sheets S is
Since the overcasting changes depending on the number of sheets stacked, there is a drawback that paper feeding errors may occur due to the influence of the number of sheets fed. The flywheel is a roller separation method in which the sheets are separated by rotating the separation roller G in the opposite direction to the feed roller F. In this method, in order to stably separate the sheets, it is important to stabilize the circumferential speed of the separation roller G relative to the sheet feeding speed, or the gear between the feed roller F and the separation row 90. Also, in this method, the gap α, which is affected by the number of sheets fed, remains unchanged as in the original method. The country uses a belt separation method, and while feeding the sheet S fed out by the delivery loaf R with the feed roller F,
This is a separation method using a separation belt G' that moves in the opposite direction to the feed roller F. Although this method improves the stability of separation, it still has the disadvantage of being affected by the number of sheets fed, just like in one country. In Ta's method, the separation roller G is replaced by two feed rollers F,
It is placed between the uphills F2, takes a predetermined amount of overlap d, and performs a separation operation using the rigidity of the sheath F2. In this method, depending on the characteristics of the sheet S, wrinkles, double feeding, or non-feeding may occur. The buckling (bending) sheet feeding method uses the rigidity of the sheet S to separate and feed sheets. Sheet) While holding down the rear end of S, reversely rotate the feed roller 2F to loosen the sheet S, release it from the presser (L-shaped part) at the leading end of the sheet S, and then turn the feed roller F. Rotate in the forward direction to feed the sheet So. This method is affected by the rigidity of the sheet S and is not suitable for sheets with creases. In the hard separating claw method, both ends of the sheet So are supported by spring-loaded separating claws, and by rotating the feed roller F, both ends of the sheet So are separated from the separating claws and fed. be. This method is also affected by the number of sheets fed as described above. Next, FIG. 15(B) shows a succinct separation paper feeding method, in which the sheet S is adsorbed to a suction unit using a vacuum pump or the like and transported to a conveying unit, and the leading edge of the sheet is attached to a feed roller or the like of the conveying unit. This method releases the suction and feeds the paper as soon as it is inserted into the paper. Examples of this method include l, field, and concave. The saccilane roller type has a small hole or slit in the outer peripheral surface of a rotatable feed roller F, and further communicates the inside of the feed roller F with a pressure reducing device such as a darbo fan (compressor). So is sucked by the filler roller F, passes through the gap below the abutting plate P, and is sent to the conveying section. In the solid succin belt type, a perforated belt F' is stretched between two rollers, and a vacuum chamber is fixed inside the belt F'. A small opening is provided in a part of the surface of the vacuum chamber that is in contact with the belt F'.
facing the hole. Further, the vacuum chamber is connected to a vacuum pump or the like. The lowermost sheet (So) of the sheets S is conveyed together with the belt F' while being vacuum-suctioned, passes through a gap below the abutment plate P, and is sent to the conveying section. The link type is the suction arm A% connected to the vacuum pump.
Alternatively, a suction arm equipped with an elastic suction cup at the tip is driven so as to draw a compound trajectory of up and down and back and forth as shown in the figure, and the tip of one piece of sheet So is released from the abutment plate P and lifted up. It is sent to This method requires a mechanism to raise the sheet loading table and keep the topmost sheet at a constant position.

[Problems to be solved by the invention]

In addition to the above-mentioned drawbacks, the frictional separation paper feeding system (A) has the following common problems. (1) Reliability of separation performance - There is a limit to the reliability of separation performance, and the double feeding rate of sheets occurs at around 0.1% or more, except for special sheets. (2) When a sheet is repeatedly conveyed and separated, the leading edge of the sheet may be damaged, such as folded edges, curls, or wrinkles, and if it is too tight, the sheet may be torn. (3) Since the sheet is pressed against the separating member, the surface of the document is worn out during the separating operation. When the sheet is a pencil-written document, the surface of the document is rubbed, the pencil writing is rubbed off, and the writing is blurred or erased. On the other hand, the suction separation paper feeding system (B) also has the following common problems in addition to the above-mentioned lack and directness. (1) In order to suction the sheet, the hydrostatic pressure is at least about 100 sal and 120 m, preferably 200-400 m.
m1120 is required, space occupied by a turbofan, compressor or other vacuum suction device is required, and the device becomes bulky. (2) Since the vacuum/suction device described above is expensive, the cost rate of the device increases significantly. (3) The above vacuum suction device generates noise of 60 dB or more, making it unsuitable for office equipment t: installed in a quiet office environment. (4) The sheet is soaked to the same extent as the frictional separation feeding method, and there is a limit to the reliability of the separation performance.

[Means to solve the problem]

The present invention eliminates the drawbacks of the prior art as described above, improves the reliability of sheet separation by more than an order of magnitude compared to conventional separation methods, and is compact and noise-generating. 1] The purpose is to provide a new sheet separation IIA. Furthermore, it is an object of the present invention to provide a new sheet separation device that can minimize damage to the sheets and distortion of images on the surface even when sheets such as manuscripts for copying are repeatedly conveyed and separated many times. It is something to do. The automatic sheet feeding device of the present invention that achieves the above object places sheets for feeding in a stacked manner on a sheet loading table, and feeds the sheets from the bottom layer of the stacked sheets by a separating device. In an automatic sheet feeding device that separates and feeds sheets one by one, the separating device includes a sheet feeding member, at least two friction members that are in pressure contact with the sheet feeding member, and a sheet conveying path of the separating device. and a movable sheet stop member for controlling sheet passage prevention. \--i

【Example】

Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments. FIG. 1 shows an automatic document handling system to which an automatic paper feeder according to the present invention is applied. This automatic document handling device includes a sheet mounting table 1 on which sheets S made up of a plurality of sheets of paper are set in a stacked state. The sheet mounting table 1
are provided with first paper feed rollers 2 and 3. A portion 10 surrounded by broken lines on the left and right sides of the figure is a separation device. This separation device I! 10 is shown in FIG. 2, where FIGS. 2(A) and 2(B) are a plan view and an A-AWR view, respectively. 3 is a perspective view of the separation device, and FIG. 4 is an enlarged side view. The separating device 10 includes a drive roller 11. A separation conveyance belt 13 for feeding the sea F wound between the driven a-ra 12 and a separation blade (
Ml friction member) 14, and a separation roller (second friction member) 1 that faces and presses against the separation conveyance belt 13.
5, a sheet stop member 16, an m2 feed*o-->17.18 which is driven in pressure contact with the separation conveyance belt 13, and a γid@19. The separation plate 14 is fixedly supported by a holding member 20 installed between both side plates of the automatic paper feeder. The tip of the separation plate 14 is pressed against a predetermined position on the outer periphery of the separation conveyor belt 13 with a predetermined pressure. The separation roller 15 is rotatably held at the intermediate portion of a link plate 22 that is swingably supported by the rotating cypress 21 . Another link plate 23 is swingably coupled to the other end of the link plate 22. The link plate 23 is further connected to the solenoid 2
It is swingably connected to the plunger 24A of No. 4. The plunger 24A is pulled outward by a spring 25 and is stopped by coming into contact with a stopper 26. In this state, the separation row 215 is in pressure contact with the separation conveyance belt 13. When the inlaid 24 connected to such a link am is energized, the plunger 24A is attracted in the direction of the arrow, bending the links 22 and 23 connected thereto, and moving the separation roller 15 to the upper left in the figure. , separated from the outer peripheral surface of the separation conveyor belt 13. Furthermore, when the energization of the thread is removed, the separation roller 15 is pressed against the separation conveyance belt 13 again. Next, the seat stop member 16 is swingably supported by the upper support shaft 16 and biased in one direction by the lower spring 27. Further, the sheet stopping member 16 plays the role of allowing or blocking the passage of the sheet S fed into the separating device 10 by its swinging motion. The PIS2 paper feed rollers 17 and 18 are provided so as to be in pressure contact with the separation conveyance belt 13 and rotate as a result of the separation conveyance belt 13.
! The sheet S fed into the copying machine 110 is conveyed along the ID plate 19 and sent onto the document table 40 of the copying machine. At the front of the guide plate 19 is a copy vcii! A conveyor belt 32 is disposed on the document table 40 of the document table 40, and is stretched between the rows 231A and 31B. The document table 4
Stop member 4 at the left end in FIG. 1 at the predetermined copying position of 0
1 is provided, and furthermore, a paper discharge guide 33 and paper discharge rollers 34A and 34B are provided from the left side to the top in the figure. 41P paper〃At one end of the id 33, the sheet holder is plate 3
5 is fixedly installed, and further to the right are rollers 36A and 36B.
A paper machine belt 37 is provided which is rotated by a paper machine belt 37. Next, the operation of the automatic paper feeder equipped with the separation device 10 will be explained with reference to FIGS. 4, 5, and 6. Fifth
FIG. 6 and FIG. 6, like FIG. 4, are side views of the separation device, each showing a different operating state. A plurality of sheets S set in a stacked state on the original document mounting plate 1 provided between the end of the paper machine belt 37 and the separation blade 14 are placed in a first position which rotates in response to a paper feeding start signal. It is conveyed by the paper feed roller 2゜3, and the sheet is
The tip of the S abuts against the curved surface of the separation blade 14. The tip of the laminated sheet S is pressed against this curved surface of the separation blade 14, and the lower sheets S of the separated sheets S are separated by the rotating separation conveyance belt 13. Only the minimum number of sheets are passed and conveyed by the frictional separation action of being pinched between the outer surface of the sheet and the tip of the separating blade 14 that is in pressure contact with the outer surface of the sheet. That is, the plurality of sheets are subjected to a first-stage separation operation by the separation blade 14, and one or two sheets are conveyed. At least one of the conveyed sheets is pinched at the pressure contact position between the separation conveyance belt 13 and the separation roller 15, and is subjected to a second stage separation operation due to frictional force, so that the one sheet in the bottom layer is Only S is separated. 1 sent out after receiving this tjIJ second stage separation operation.
The sheet S1 is subsequently fed into a pressure contact position between the separation conveyance belt 13 and the second paper feed roller 17, and is conveyed under pressure. Figure #S4 is a sectional view of the separation H position at this first position. At this time, the plunger 24A of the solenoid 24 is pulled out by the spring 25 and is in contact with the stopper 26, the link 23.22 is in an extended state, and the separation roller 15 is in pressure contact with the separation conveyance belt 13. It is. Further, at this time, since the upper end portion 16B of the sheet stopping member 16 is separated from the link 23, the sheet stopping member 16 rotates counterclockwise about the support shaft 16A. Here, the lower end portion 16C of the sheet stopping member 16 is located above the separation conveyance belt 13 as shown in the figure and at a position retracted from the conveyance surface of the sheet S1, so that it does not prevent the conveyance of the sheet S1. FIG. 5 is a side view of the separation device in a second position. In this state, the solenoid 24 is energized, the plunger 24A is retracted, and the links 23 and 22 are bent in conjunction with this, so that the separation row 215 is released from pressure and creates a gap with the separation conveyance belt 13. At the same time, the upper lR16B of the seat stop member 16 is pressed by the side surface of the inclined link plate 23, and rotates clockwise around the support shaft 16A as shown in the figure.
C comes to a point where the separation conveyance belt 13 and the separation roller 15 come to a stop substantially on the extension of the external tangent line when they were in pressure contact with each other before. As a result, the forward end of the plurality of sheets S2, which are sequentially and multi-fed due to the surface friction of the sheets S, is stopped by the lower part 16G of the sheet stopping member 16, so that the separation roller Passage under 15 is prevented. In this way, the following sheet group S2 is blocked, and the bottom layer 1
Only the sheet S is held by the second paper feed rollers 17 and 18 and conveyed along the side plate 19. FIG. 6 is a cross-sectional view of the separation 1 showing this sheet conveyance state. Thereafter, the sheet S is conveyed by the conveyor belt 32 on the document table 40, and when the leading end of the sheet S+ reaches the stop member 41, the conveyance is stopped and the sheet stands still. The image on this stationary sheet S1 is then copied by scanning with the moving exposure optical system. Alternatively, while the sheet S is conveyed on the document table 40, the sheet S is relatively moved by a static exposure optical system to perform copying. After the copying is completed, the stop member 41 is retracted, and the sheet S1 is carried upward by the conveyor belt 32 along the conveyor side 33, is discharged by the paper discharge rollers 34A and 34B, passes through the paper discharge tray 35, and is aligned. The belt 36 returns the sheet S to the uppermost position on the document table 1. Do the same thing below, starting with the second sheet from the bottom)
S2 is at the lowest position, and the paper is fed and conveyed through two stages of separation operations in the same manner as described above. In this way, S)
When the total number of originals is fed, transported, stopped, copied one sheet, transported and discharged, and the sheet S on the sect table 21 is returned to the top each time, a sheet consisting of the total number of originals is returned. S
By repeating this process as many times as necessary, a predetermined number of aligned copies of the sheet S will be created. The optimum pressure contact force between the separation blade 14 and the separation conveyance belt 13 is 100-30 when a general sheet, for example 70 kg1j; is held in the pressure contact position and the sheet is pulled out.
It is 0gr. Here, as the separation blade 14, R# material such as urethane rubber or silicone rubber is used in a single layer or in a multilayered manner. A friction member such as urethane rubber or silicone rubber is used as the separation roller 15, but the pongee torque is transmitted until the force applied to the roller circumferential surface reaches a certain value, and when the force exceeds that value, it becomes a 79-state. A limited power transmission means (a so-called trilimiter) is preferable. The configuration of the trilimiter will be explained with reference to FIG. The separation roller 15 is attached to a separation roller boss 52 that is rotatably fitted around the separation roller $11151, and is located on one end surface side of the separation roller boss 52, so that a spring shackle 53 is attached to the separation roller boss 52. It is fitted onto the shaft 51. One end of the spring restraint 53 is fixedly held by a spring support member 54 fixedly attached to the separation roller shaft 51, and the other end of the spring restraint 53 is fixed to the separation roller boss 52. A cylindrical portion 52a protruding from the side end surface is fitted onto the outside with its inner diameter portion tightened. Then, the separation roller shaft 5
The separation roller 15 transmits the pongee torque of 1 to the separation roller boss 52 attached thereto. Here, the function of the trilimiter will be explained with reference to FIGS. 8(a) and 8(b). When a torque limiter is used for the separation roller 15, it is common to apply a rotational torque in a constant direction D2 to the pongee 51. 6 Figure 8 (a) shows the case where the separation operation is ) * < performance. In this figure, there is one sheet S between the separation roller 15 and the separation belt 13. At this time, the friction coefficients of each member have the following relationship. Coefficient of friction between the separation belt 13 and the sheet S: μ^ Coefficient of friction between the separation roller 15 and the sheet Sflll 2 μB Coefficient of friction between the sheets S: μ. When μ ＾ 〉 μ C 會 μ B 〉 μ , the separation can be achieved by setting the limit value of the droklimic to less than the pongee torque generated based on the crimping force of the separation a-215 and the friction coefficient μB. The roller 15 is released from the pongee 51 and rotates in the direction D1 of the arrow shown in the figure. On the other hand, as shown in FIG. 8(b), if the separation is insufficient and two sheets S, S2 are caught between the separation a-215 and the separation conveyor belt 13, The friction coefficient μC between the sheet S and the separation roller 15 or the friction coefficient μB between the sheet S and the separation conveyance belt 13,
Since the torque of the shaft 51 is directly transmitted to the separation row 215, it rotates in the direction D3. Therefore, the sheet S2 is returned in the opposite direction to the conveyance direction to prevent double feeding, and only the sheet S2 is fed. As explained above, in the separating operation, the separating roller 15
Since the pressure is released, the separation roller 15 comes into direct contact with the sheet surface only at the tip. J% Physically #G
In FIG. 4(a), the separation row 215 and the second paper feed roller 1
This length is limited to the length q between 7 and 10 to 2 in the general formula.
It is about 0-+s. Therefore, even if C) S is a pencil manuscript, the distortion on the manuscript surface is limited to this range, and in many cases, this portion is generally a blank space, so it is extremely unlikely to be a problem in practice. Furthermore, if a dolk limic is used as the separation roller 15, not only will reliability be improved by returning the sheet S in the opposite direction, but in the case of one sheet, the separation conveyance belt 13 will be reduced from 51 to 7. Because it follows the direction of rotation of the sheet, it does not apply force in the opposite direction to the leading edge of the sheet, unlike when using a fixed separating member or reverse roller (belt), which can cause damage such as bending or tearing the leading edge of the sheet. Things will go away. FIGS. 9(a) and 9(b) are perspective views of a separation device showing another embodiment of the present invention. The sheet stopping member 16 of the separation device was stopped and released by rotating around the circular ring, but as shown in the figure, it can be directly stopped and released by vertical movement using a solenoid 55 or the like.
You may also perform a release operation. FIG. 9(&) shows that the sheet stop member 56 is pulled up and
At this time, the bent portion 56A of the sheet stop member 56 comes into contact with the upper fixing plate 57 and is at the upper stop position. FIG. 9(b) shows the stopping operation with the blanker 55A of the solenoid 55 extended. As a result, the sheet stopping member 56 is pushed down and presses the outer peripheral surface of the separation belt 13. In this state, the sheet S is prevented from advancing and stops. FIGS. 10 to 14 are diagrams showing various other embodiments of the separation device M according to the present invention, and in these diagrams,
(A) shows a plan view, and (B) shows an A-A cross-sectional view. Regarding the symbols used in these drawings,
The same reference numerals are given to the same functional parts as in FIGS. 1 to 6. First, FIG. 10 shows a separation conveyance belt 13 compounded parallel to the sheet conveyance direction to provide 13A and 13B, and a separation blade 14A, which is a first friction member, in pressure contact with these.
, 14B, and a separation roller 15 which is a second friction member.
This configuration has a plurality of each of A and 15B. FIG. 11 shows that a drive shaft 60 of the separation conveyance belt 13 is provided with separation rollers 61A and 61B at both ends of the separation conveyance belt 13, and the separation rollers 61A and 61B are rotated coaxially.
B is brought into pressure contact with the separation blades 14A, 14B to perform first-stage frictional separation, and the separation belt 13 and separation roller 1 are brought into pressure contact with each other.
This is a separation device that performs a second stage of frictional separation by bringing the two parts into pressure contact with each other. In Figure 12, the separation device performs first-stage frictional separation using frictional conveyance bells (13A, 13B) at both ends of the drive shaft 60 and separation bells (14A, 148") in pressure contact with these, and second-stage frictional separation. is performed by the separation roller 61C of the drive 60 and the separation roller 15. In the separation device shown in FIG. 1st
This is provided separately from the stage drive 61. The separation roller 15 comes into pressure contact with the separation roller 63. The separating device shown in FIG. 14 includes the separating roller 63 shown in FIG.
This is an example in which a separation conveyor belt 13 is used instead of. 1st
In the embodiments shown in FIGS. 3 and 14, it is possible to make the speed of the first-stage frictional separation and the speed of the second-stage frictional separation variable, so that the tension and relaxation of S) can be freely adjusted. It is characterized by being configurable. In the above embodiments of the present invention, the copied sheet is returned to the original document stacking position, but the invention is not limited to this. For example, the copied sheet is returned to the original document stacking position. It goes without saying that the present invention can also be applied to a device for transporting the present invention to a predetermined location other than that of the above, and can also be applied to a processing installation that performs appropriate processing other than copying.

【Effect of the invention】

As described above, according to the automatic sheet feeding device of the present invention, the separation blade and separation roller perform two stages of frictional separation, and the sheet stopping member prevents double feeding of sheets that are fed in the dark. By providing this, the sheet separation performance, which is suitable for bottom-feeding automatic paper feeding, is significantly improved.
It is possible to prevent non-feeding, double feeding, image costs on the sheet surface, damage to the leading edge of the sheet, etc., and it has also become possible to separate and feed a wide range of paper types.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an automatic paper feeder according to the present invention, FIG. 2 is a partial schematic diagram of a pulp separation device of the automatic paper feeder, and FIG. 3 is a perspective view thereof. 4, #5, and 6 are cross-sectional views showing the operation of the separating device and the sheet separating/feeding process in the automatic sheet feeding apparatus according to the present invention. FIG. 7 is a perspective view of the torque limiter, and FIG. 8 is a diagram explaining the operation of the torque limiter. FIG. 9 is a perspective view showing another embodiment of the seat stop member. 10 to 14 are schematic diagrams showing various other embodiments of the separation apparatus according to the present invention. FIG. 15 is a schematic diagram-electronic diagram of various sheet double-feed separation systems in the prior art. DESCRIPTION OF SYMBOLS 1... Sheet loading table, 2, 3... First paper feed roller 10... Separation device, 13.53^, 53B...
・Separation conveyance belt (sheet feeding member) 14.54^, 54B, 64...Separation blade (#S
1 friction member) 15.55^, 55B...Separation roller (second friction member) 16...Sheet stopping member, 1F, 18...Second paper feed roller 20...Holding member, S... Sheet (group) So, S,... One sheet Figure 5 Figure 6 U

Claims (3)

[Claims] (1) Automatic feeding in which sheets for feeding are placed in a stacked manner on a sheet loading table, and the sheets sent out from the bottom layer of the stacked sheets are separated and fed one by one by a separating device. In the paper device, the separating device includes a sheet feeding member;
An automatic sheet feeding device comprising at least two friction members that are in pressure contact with the sheet feeding member, and a movable sheet stopping member that controls sheet passage and prevention of sheet passage through a sheet conveying path of a separating device. . (2) The sheet stopping member is in a first position where it does not impede sheet passage while one of the friction members is in pressure contact with the sheet feeding member and is frictionally separated from the sheet feeding member; When the pressure contact is released and the sheet is conveyed, the sheet is moved to a second position where conveyance of a group of sheets other than the one sheet to be separated and conveyed is prevented. Automatic paper feeder. (3) The sheet feeding member is composed of a belt or a roller, and the at least two friction members that press against the sheet feeding member are composed of a blade and a roller. automatic paper feeder