JPH02261739A - Separative feeder for paper sheets - Google Patents

Abstract

PURPOSE:To feed paper sheets accurately piece by piece by forming a pressing operation intermittently with a pressing means from the opposite side at time of feeding operation of the paper sheets by a feeding means, and then driving a separative feeding part for their separative feeding. CONSTITUTION:When an original P is charged into a stacking chamber 6A after stacking multiple sheets in pile, the existence of paper is detected with a detecting lever 67 pushed aside, and the original is positioned by a stopper 10 jutting out to the inclined lower end side of amount 6B and held on standby. Next, when a motor is driven, a feed roller 11 rotates to the right, while the stopper 10 is lowered by a cam, dropping the original P from the uppermost layer side slidingly by degrees, then the stopper goes up, pressing the original P to the feed roller 11, and the original P on the uppermost layer is infallibly preceded rather than the lower original P and bitten into a nip part between a takeout roller 56 and a separate roller 59. Thus, the original P in a stacked state is surely feedable piece by piece from such one at the emdmost layer in order.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is directed to sequentially stacking paper sheets in a stacked state, starting from the outermost layer.
This invention relates to a separating and feeding device for paper sheets that feeds sheets one by one.

[Technical background of the invention and its problems] This type of device, for example, allows documents placed in a stacked state on a document table to slide down and feed them to the separating and feeding section; An example of such a device is to separate the edgemost layer of a document from other documents and take it out, and to transport the taken-out document to a predetermined position on the document table of a copying machine using a conveying section.

However, this device has a problem in that unless the originals are reliably fed to the separation and feeding section, the originals cannot be separated and fed. In addition, if it is not possible to feed the originals in the outermost layer to the separation and feeding section in advance of the other documents below, the originals in the outermost layer (11>, 7%i, N) will be sent one by one to the document table. Furthermore, in order to reliably perform the separation and feeding operation, the separation and feeding section must be driven after the document slides down, so multiple drive sources are required. However, this has the problem of causing malfunctions due to noise and the like and increasing the size of the device.

[Purpose of the Invention] The present invention has been made in view of the above circumstances, and its purpose is to at least improve the feeding operation of paper sheets in a stacked state and the operation of the outermost layer of paper sheets after the feeding operation is completed. By accurately setting the timing with the separation and feeding operation that separates and takes out paper sheets from other sheets, it is possible to contribute to miniaturization, and also to separate stacked sheets from the outermost layer. To provide a separating and feeding device for filter paper sheets that can reliably feed one sheet at a time.

[Summary of the Invention] In order to achieve the above object, the present invention provides a feeding means for conveying paper sheets stacked on a loading table along the said loading table, and a feeding means for conveying paper sheets stacked on a loading table, and a transporting means for transporting paper sheets conveyed by this feeding means to a destination. a conveying means for conveying the paper sheets to the feeder; a driving means for driving a separation feeding section for separating and feeding the paper sheets after the driving of the feeding means is finished; and a driving means for driving the conveying means after the driving of the separating feeding section is finished; and a pressing means that performs a pressing operation intermittently so as to press the paper sheet from the opposite side to the feeding means when the paper sheet is fed by the feeding means.

[Embodiments of the Invention] Hereinafter, embodiments of the paper sheet separation and feeding apparatus of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic perspective view of an apparatus according to an embodiment of the present invention applied to a copying machine. In the figure, the reference numeral 1 indicates the main body of the copying machine, and on the side thereof, there is provided a separation and feeding device 2 for separating and feeding paper sheets (hereinafter referred to as "document P"), which is an embodiment of the present invention.
is removably provided. This document P separation and feeding device (hereinafter also simply referred to as separation and feeding device) 2 sequentially sorts the documents P input in a stacked state from the end layer, for example, the top layer.
This is a device that feeds out sheets one by one. The fed original P is sent to a predetermined position on the original platen glass 4 by a transport device 3 which is attached to the back of the copying machine main body 1 so as to be openable and closable, and after copying is completed, the original P is transferred to the original tray. 5
sent to. In this way, new documents P are sent one after another through the separation and feeding device 2 and are provided for copying. In the separation and feeding device 2, the configuration of the placement section 6 on which the stacked documents P are placed is as follows. That is, the mounting table 6B forms a part of the bottom surface of the accumulation chamber 6A that can accommodate a plurality of originals P at once and in an inclined state.
is provided in an inclined position.

A pair of side regulating plates 6C are disposed on the upper surface of the mounting table 6B and are slidable in a direction perpendicular to the feeding direction depending on the size of the document P. Further, at the inclined upper end part, when the original P is set in the transverse direction, it can be rotated and stored on the mounting table 6B as shown by the solid line in the first figure, and when the original P is set in the longitudinal direction, the original Approximately 1 as shown by the two-dot chain line in Figure
A document support member 6D, which is rotated by 50 degrees and forms an extension of the mounting table 6B, is pivotally mounted.

Here, the outline of the separation and feeding device 2 will be explained based on FIG. 2, which is a schematic side view showing the internal mechanism of the separation and feeding device 2. In the figure, the reference numeral 6B is the mounting table, on which the originals P are placed in a stacked state.

The placed originals P are moved by a stopper that can swing in the directions of second arrows A1 and A2 (positioning of the placed originals P is restricted, and when the positioning restriction is released, the originals P in the stacked state are continued). This is an example of a pressing means that also has a positioning function of pressing the stopper 10.
When the document P is rotated in one direction, it naturally falls diagonally downward, and when it is then rotated in the direction of the second arrow A2, the fallen document P
The back side is pressed by the stopper 10. A feeding means, for example, a feeding roller 11, is provided which reliably feeds the original forward by rolling into contact with the edgemost layer of the pressed original P. Furthermore, this feed roller 1
1 is an example of a feeding means that feeds the outermost layer of paper sheets stacked on a mounting table in advance of the other sheets. Further, there is provided a separating and feeding section 12 which separates and takes out the outermost layer of the documents P sent in a stacked state by the cooperation of the feed roller 11 and the stopper 10 from other documents P. , the document P sent from here passes through a pair of registration rollers 13A and 13B provided at the other end.
The document P is brought into contact with the document P, and after the timing for conveying the document P is determined, the document P is conveyed toward the document table glass 4.

These registration rollers 13A and 13B are connected to the separation feeding section 12.
This is an example of a conveying means for conveying the document P taken out in the forward direction. Incidentally, as shown in FIG. 2, the feed roller 1
A first mylar guide 15A is provided in front of the paper sheet 1 so that the stacked documents P can be placed smoothly on the table 6B. Further, a second mylar guide 15B is provided above the feed roller 11 to the separation feeding section 12, and a third mylar guide 15C is provided below the feed roller 11. The sent document P can be smoothly and reliably sent to the separation and feeding section 12.

Next, the apparatus of this embodiment will be explained in detail with reference to FIG. 3 showing the driving means of the separating and feeding apparatus 2.

The device of this embodiment has the stopper 10. Feed roller 1
19 separation feeding section 12 and registration rollers 13A, 13B
etc., are selectively driven by forward and reverse rotation of a single drive source. For this purpose, first, a drive source, for example, a motor 20, capable of forward and reverse rotation in the direction of the third arrow X2 in the figure, and a
A first pulley 21A fixed to the motor shaft, a second pulley 21B to which rotation of the first pulley 21A is transmitted, and a first timing belt 22A stretched between both pulleys 21A and 21B. A first idle gear 23A that rotates integrally with the second pulley 21B, and a first idle gear 23
A second idle gear 23B that meshes with A, a first drive gear 24A that meshes with the second idle gear 23B, and a first shaft 25 that rotates integrally with the first drive gear 24A.
The first shaft 25 rotates in the X2 direction when the motor 20 rotates in the X1 direction, and rotates in the Y2 direction when the motor 20 rotates in the Y1 direction. Furthermore, motor 2
The details of the power transmission system from 0 to the first drive gear 24A are shown in the exploded perspective view and assembled perspective view shown in FIGS. 4(a) and 4(b).

At the third right end of the first shaft 25 in the drawing, the Y of the first shaft 25 is
A second drive gear 24B is fixed via a first one-way clutch 26A that transmits rotation in only two directions. Note that the first one-way clutch 26A transfers only the power based on the forward rotation of the drive source 20 to the separate feeding section 12.
This is an example of a first power intermittent means for transmitting power to. Further, a third drive gear 24C to which rotation of the second drive gear 24B is transmitted, a separation feed shaft 35 that rotates in the direction of the third arrow X2 together with the third drive gear 24C, and a separation feed shaft 35. a third pulley 21C fixed to 35;
A fourth pulley 21D to which the rotation of the third pulley 21C is transmitted, and a second pulley 21D stretched between both pulleys 21C and 21D.
A timing belt 22B and a take-out roller drive shaft 27 that rotates in the direction of arrow Y4 together with the fourth pulley 21D are provided.

Further, a first shaft 25 is provided at the third left end of the first shaft 25 in the drawing.
A fifth pulley 21E is fixed via a second one-way clutch 26B that transmits only rotation in the third arrow X2 direction. In addition, the second one-way clutch 26B
Only the power based on the rotation of the drive source 20 in the opposite direction is transferred to the conveying section 13A.

13B is an example of a second power intermittent means for transmitting power to 13B. Furthermore, a sixth pulley 21F to which the rotation of pulley 21E in FIG. 5 is transmitted, and both pulleys 21E.

A third timing belt 22C stretched on 21F,
A second shaft 28 that rotates integrally with the sixth pulley 21F in the direction of the third arrow X3 is provided. This second axis 28
A fourth drive gear 24D is fixed to the right end in the third diagram of FIG. A registration roller shaft 29A is provided, and one registration roller 13 explained in FIG.
A is attached to the first registration roller shaft 29A and the third
It is rotatable in the direction of arrow X4 in the figure. The other registration roller 13B explained in FIG. 2 is attached to a freely rotatable second registration roller shaft 29B, and is pressed by the registration roller 13A located below through a biasing member (not shown). It has become so.

Further, a seventh pulley 21G is provided at the intermediate portion of the first shaft 25.
is fixed to the eighth pulley 21H, to which the rotation from the seventh pulley 21G is transmitted, and the fourth timing belt 22D stretched between both pulleys 21G and 21H rotates integrally with the eighth pulley 21H. A third shaft 30 is provided. Incidentally, this third shaft 30 is connected to the eighth boolean IJ 21.
It is composed of a driving shaft 30A that rotates integrally with H, and a driven shaft 30B that is separated from this driving shaft 30A.
A and 30B are connected and connected by a clutch 31. Here, the configuration of this clutch 31 is shown in FIG.
) and (b).

That is, as shown in FIG. 5(a), the driving boss member 31
A is attached to be able to rotate integrally with the driving shaft 30A, and a driven boss member 31B is attached to be able to rotate integrally with the driven shaft 30B, and a spring joint 31C is attached to the boss portion 31A' of the driving boss member 31A. One end of the spring joint 31C is fitted onto the outside, and the other end of the spring joint 31C is fixedly held to the driven boss member 31B.

Further, a sleeve 31D is fitted over the spring joint 31C, and this sleeve 31B is once fixedly attached to one part of the spring joint 31C, and a locking protrusion 31E is provided on the outer periphery of the sleeve 31D. They are placed opposite each other. Furthermore, as shown in FIG. 5(b), near the sleeve 31D, there is a base 31F, an intermittent lever 31G swingably provided on the base 31F, and an intermittent lever 31G that is rotated in the direction of arrow C□ force. A clutch disconnection section 31K is provided, which is constituted by a biasing member 31H that biases and a solenoid 31J that rotates the disconnection lever 31G in the direction of arrow C2 against the biasing force of the biasing member 31H. In such a latch 31, when the solenoid 31J is demagnetized, the distal end 31G of the intermittent lever 31G
' is adapted to engage with the locking protrusion 31E of the sleeve 31D, and at this time, the rotation of the sleeve 31D shown in FIG. 5(a) is restricted, so that the boss portion 30A' of the driving boss member 31A is the spring joint 3
The torque of the driving shaft 31A is not transmitted to the driven shaft 30B due to slippage at the inner diameter portion of the shaft 1C. Furthermore, when the solenoid 31J is energized, the distal end 31G' of the intermittent lever 31G is disengaged from the locking protrusion 31E of the sleeve 31D.
Since D becomes free, the torque of the driving shaft 30A is transmitted to the driven shaft 30B by the frictional force between the inner diameter portion of the spring joint 31C and the boss portion 31A' of the driving boss member 31A.

Next, the first shaft 25, the separation feeding shaft 35. Stopper 10 to be driven via the take-out roller shaft 27 and the third shaft. The feed roller 11 and the separation feed section 12 will be explained in detail. The drive system of this part is shown in part 1 of FIG. 3, and corresponds to the part shown in FIG. 2.

FIG. 6 is a detailed perspective view of portion J shown in the third figure.

As shown in FIG. 6, the stopper 10 is provided so as to be able to swing slightly (in a direction perpendicular to the feeding direction of the original P) via a pin 41 attached to the center of one end of the stopper holding member 40. There is. This is to uniformly press the document at the tip of the stopper 10. and the stopper holding member 4
The other end of 0 is fixed to a cam lever shaft 42, and this shaft 42
A cam lever 43 is attached to the end of the cam lever 43. A biasing member 44 is attached to the cam lever 43, and constantly biases the cam lever shaft 42 to rotate in the direction A2 in the fourth figure.

Then, actuate this cam lever 43 to move the stopper 10 to the direction indicated by the arrow in FIG. 6 and the second figure.

In order to swing in the A2 direction, the third shaft '3 as shown in FIG.
A cam 44 is attached to the driven shaft 30B. As a result, the rotation of the cam 44 causes the stopper 10 to swing in the directions of arrows A and A2 in FIGS. Manuscript p
ij: When the document P naturally falls diagonally downward and then rotates in the direction of arrow A2, the back side of the fallen document P is pressed by the stopper 10 and is pushed diagonally upward. Note that a friction braking member (not shown) is provided at the tip of the stopper 10, that is, the portion that presses the document P. This can prevent the bottom layer document P from slipping against the stopper when the top layer document P is fed by the feed roller.

As shown in FIGS. 3 and 6, the feed roller 11 is a feed roller that is rotatably inserted into an intermediate portion of a pair of arms 50 that are rotatably attached to the take-out roller drive shaft 27. A shaft 51 is provided, and is attached to both ends of the feed roller shaft 51 so as to be able to rotate integrally therewith. In order to drive the feed roller 11, the third shaft 3
The first drive sprocket 52 is attached to the driven shaft 30B of
A is attached so that it can rotate integrally with the feed roller shaft 51, and only rotates in the direction of the arrow X shown in FIGS. 3 and 6.
The second drive sprocket 52B is connected to the feed roller shaft 5 via the third one-way clutch 26C.
1, and a first ladder chain 53A is stretched between both sprockets 52A and 52B. still,
The third one-way clutch 26C is an example of a third power intermittent means that transmits only the power to the feeding section 11 based on the rotation of the drive source 20 in the opposite direction. The driven shaft 30B is
When rotated in the direction of the arrow X shown in the figure, it is rotated in the direction of the arrow X6 shown in FIGS. become.

Since the original is forcibly sent to the destination, it can be reliably sent to the separation and feeding section 12 shown in FIG.

As shown in FIGS. 3 and 6, the separation feeding section 12 includes a take-out roller shaft 55 that is rotatably inserted into the vicinity of the free ends of the pair of arms 50, and both ends of the take-out roller shaft 55. a fourth drive sprocket 52D fixed to the intermediate portion of the take-out roller shaft 55; and a third drive sprocket 52D of the take-out roller shaft 27.
4 and 6, which transmits only the rotation in the direction of arrow X6 shown in the figure.
Take-out roller shaft 27 via one-way clutch 26D
a third drive sprocket 52C provided on the sprocket, a second ladder chain 53B stretched across both sprockets 52C and 52D, and the separation feed shaft 35 shown in FIG.
A limited power transmission mechanism 58 is provided to transmit the rotational torque of the separation and feeding shaft 35 within a certain range, and the torque is transmitted through the limited power transmission mechanism 58, and the torque is transmitted to the take-out roller. 56 and a separation roller 59 disposed opposite to each other. The pair of arms 50 are biased downward in FIG. 6 by a biasing member (not shown), so the take-out roller 56 and separation roller 59 are in contact with each other with a constant force.

The limited power transmission mechanism 58 is configured as shown in FIG. 8, and the separation roller 59 is attached to a separation roller boss 61 made of resin and rotatably fitted onto the separation roller shaft 35. A spring joint 62 is located on one end surface side of the roller boss 61 and is fitted onto the separation roller shaft 35 . One end of the spring joint 62 is fixedly held by a spring support member 63 fixedly attached to the separation roller shaft 35, and the other end of the spring joint 62 is held on one side of the separation roller boss 61. The cylindrical portion 61a protruding from the end surface is fitted onto the outside with its inner diameter portion tightened. Then, the separation roller shaft 35 is moved by the friction force between the inner diameter part of the spring joint 62 and the outer peripheral surface of the cylindrical part 61a of the separation roller boss 61.
The axial torque of the separation roller 59 is transmitted to the separation roller boss 61 to which the separation roller 59 is attached. Also, the separation roller 5
When a certain braking torque is applied to the separation roller boss 61 via the separation roller boss 61, the cylindrical portion 61a of the separation roller boss 61 slips on the inner diameter portion of the spring joint 62, and the rotation of the separation roller 59 is restricted. . The separation roller 59 is made of a urethane rubber material with a hardness of 80°, for example, in order to obtain a constant braking force through friction with the document, and has a well-finished surface to prevent paper residue from adhering to the separation roller 59. It is also able to respond to changes over time.

As a result, the take-out roller 56 rotates in the direction of the third arrow Y in the figure, and the separation roller 59 rotates in the direction of the third arrow Y3 in the figure. When the originals P are in contact with each other in a stacked state, the uppermost original P is sent forward by the rotation of the take-out roller 56, and the original P below it is returned in the opposite direction by the rotation of the separation roller 59. This is because the limited power transmission mechanism 58 does not slip depending on the frictional force between the documents P. As a result, only the uppermost document P is reliably taken out. When the taken out document P is conveyed, the frictional force between the document P in the middle of conveyance and the separation roller 59 acts as a braking torque sufficient to cause the limited power transmission mechanism 58 to slip. The lower surface of will reverse the separation roller 59. Incidentally, during the conveyance of the uppermost document P, when the lower document is about to enter between the take-out roller 56 and the separation roller 59, the braking torque is released and the separation roller 59 moves in the third direction X1 in the figure as described above. It will rotate and go back in the opposite direction.

Note that a document detecting section 65 is provided to detect whether or not a document is placed on the placing table 6B (see FIGS. 1 and 2). As shown in FIG. 9, this consists of a rod 66 fixed to a frame (not shown) and a rod 66 rotatably
6, a release cam 68 that is fixed to the driven shaft 30B of the third shaft 30 and can be engaged with the back surface of the detection lever 67, and the presence or absence of the tip 67A of the detection lever 67. When a stacked document P is inserted from the direction shown in FIG. 69, it is determined that there is a document present, and when the document P is gone, the detection lever 67 is activated.
As a result of the front end portion 67A blocking the detector 68, it is possible to determine that there is no document.

Next, the operation of the separating and feeding device 3 will be explained with reference to FIG. 10.

FIG. 10(a) is an explanatory diagram of the state before inputting the original. First, a plurality of documents P are piled up and put into the stacking chamber 6A at once. At this time, the document P placed in the collection chamber 6A is the 10th document P.
As shown in FIG. 6(b), the detection lever 67 is pressed to disable the turn off detector 68, thereby detecting the presence of paper. Then, the manuscript P put into the collection chamber 6A is
A side regulating plate 6C on the mounting table 6B, a stopper 10 protruding toward the lower end of the inclined surface of the mounting table 6B, and a feed roller 11 in contact with the stopper 10 hold both ends and the tip of the mounting table 6B in a positioned position on standby. be done.

Next, when a start button (not shown) of the separating and feeding device 2 is pressed, the motor 20 is rotated in the third X1 direction (reverse direction) shown in the figure, and the solenoid 31J is energized. When the solenoid 31H is excited, Fig. 5(a), (
As explained in b), the clutch 31 is in the connected state,
The rotation of the motor 20 in the X1 direction is from the first shaft 25 to the third shaft.
It is transmitted to the driven shaft 30B via the driving shaft 30A of the shaft 30, and this shaft is rotated in the X1 direction shown in the third diagram.

Due to this rotation, the first drive sprocket 52
A, second drive sprocket 52B.

The feed roller 11 rotates in the X6 direction shown in the third figure via the first ladder chain 53A and the third one-way clutch 26C, and the cam 44 attached to the driven shaft 30B rotates to bias this cam. The stopper 10 rotates in the direction of the arrow A□ force in FIG. 10(c) and descends via the cam lever 43° and the cam lever shaft 42 that are in contact with it. Then, as shown in FIG. 10(C), the documents P gradually fall diagonally downward from the top layer.

When the cam 44 is further rotated, the stopper 10 is rotated in the direction of arrow A2 in FIG.
press against. The original P pressed against the feed roller 11, that is, the uppermost original P, is placed at X6 in FIG. 10(C).
The feed roller 11 rotating in the direction bites into the contact portion between the take-out roller 56 and the separation roller 59.

This operation is performed during one rotation of the driven shaft 30B, and as the driven shaft 30B is rotated one more time, as shown in FIG. 10(C).
And the same operation as shown in FIG. 10(d) is performed (FIGS. 10(e) and (f)). As a result, the document P in the uppermost layer always gets wedged between the take-out roller 56 and the separation roller 59 before the document P located below it.

When this biting operation is completed, the motor 20
is reversed and rotates in the third illustrated arrow Y1 direction (forward direction). Then, the first shaft 25, the first one-way clutch 26A9 separation feeding shaft 35. shown in FIG. Take-out roller drive shaft 27. Fourth one-way clutch 26A9 separation feeding shaft 3
5. Take-out roller drive shaft 27. The take-out roller 5 is connected via the fourth one-way clutch 26D and the take-out roller shaft 55
6 is arrow Y in Fig. 10 (g), force direction 100 mm/se
It rotates at a low speed of about c, and at the same time, on the other hand, the third arrow Y
A separate feeding shaft 35 that rotates in three directions and a limited power transmission mechanism 5
8 to rotate the separation roller 59 in the opposite direction to the feeding direction of the document P. At this time, as shown in FIG. 10(h), the uppermost document P1 or the document Px in the vicinity thereof is completely transferred between the take-out roller 56 and the separation roller 5.
At the moment when the contact portion 9 is not engaged, the frictional rotational force transmitted by the take-out roller 56 to the separation roller 59 exceeds the reverse frictional rotational force of the separation roller 59 transmitted via the spring joint 62 shown in FIG. 8(a). The take-out roller 56 rotates in the forward direction as a driving roller, and the separation roller 5
9 rotates in the forward direction as a driven roller and separates the roller 5.
9 rotates in the forward direction as a driven roller. If this operation continues, the outer periphery of the take-out roller 56 made of natural rubber material with a large coefficient of friction will ensure that the document P1 or Px is brought into contact with the take-out roller 56 and the separation roller 59 as shown in FIG. 10(i). Invite.

In addition, due to the difference in frictional resistance, when taking out one sheet, the separation roller 5
9 rotates in the direction to take out the original P□, or in the direction to return the original Px if there are two or more sheets. And Fig. 10 (g
) As shown in FIG. 10 (D), if one sheet is reliably taken out by the cooperative action of the two pairs of rollers, it is fed by a predetermined amount by the action of the take-out roller 56, and then the registration roller 13A provided in front of the sheet is fed as shown in FIG. 10 (D). , 13B, the leading edge of the document P bites into the contact portion of the take-out roller 56 and the registration roller 13A.

The motor 20 temporarily stops after the original is waved between the original and the original 13B and the leading edge misalignment is corrected.

Here, FIG. 10(k) shows the document feeding and separating actions between the take-out roller 56 and the separation roller 59.
This will be explained in further detail while also referring to (1).

Ideally, as the stopper 10 descends, the uppermost document P on the placement guide 6B bites into the contact portion between the take-out roller 56 and the separation roller 59. However, the manuscript P of different paper quality
There is no guarantee that the originals P will be separated in a mixed arrangement, or that the originals P will be separated in an ideal step-like manner (the originals P located below the top original P will bite into the contact area between the take-out roller 56 and the separation roller 59). (This may occur on very rare occasions) Separation is effected by the action of the take-out roller 56 and separation roller 59, which are activated with a time delay as described above. In reality, the moment two or more originals P are caught in the contact portion of both rollers 56 and 59 in any form, the take-out roller 56 moves to the top original pxt as shown in FIG. 10(j'). Frictional conveyance force transmitted to the top document P
PX2 and PX are frictionally conveyed by receiving the conveying force of XI.
2 (or PX3) is transmitted as a frictional conveyance force to the upper surface of the document PR in contact with the separation roller 59. However, in the - direction, a returning force is transmitted to the document PR from the separation roller 59, which is always subjected to a reverse rotational load with respect to the pick-up and conveyance direction, through the spring joint 62 shown in FIG. 8(a). This can be achieved by setting the frictional conveyance force transmitted by the separating roller 59 to the document PR to be greater than the frictional conveyance force between the documents received from the take-out roller 56.

Therefore, the document PR is transferred to the placing table 6 by the action of the separation roller 59.
While being returned to the B direction, the document Px1. PX
2 (PX3) advances in the take-out direction by the action of the take-out roller 56. Here, the reversal circumferential speed vR of the separation roller 59 is set to be approximately three times V with respect to the circumferential speed VF of the take-out roller 56, so that when the document Px in contact with the take-out roller advances by lQmm from the multi-feed state, Assuming this, the document PR in contact with the separation roller 56 will be returned by about 30 mm.

However, if the distance 1 (not shown) from the contact portion of the take-out roller 56 and separation roller 59 to the leading edge of the document PR is 30 mm or less (X) at the moment when separation starts, the amount of return of the document J-x is Original PX2 located above PR
(or P, 3) as a return amount and is instantly pushed back. This is repeated to perform the separation action, and the take-out roller 5
It comes into contact with the lower surface of the original PXI which is in contact with 6. The separation roller 59 continues to try to push back the document PXI, but there is an eighth
A spring joint 62 shown in FIG. Although the separating roller 59 receives the frictional driving force, the frictional conveying force transmitted by the take-out roller 56 to the upper surface of the document PXI is much larger than the frictional force transmitted from the spring joint 62 to the separating roller 59. , the original PXI is taken out and conveyed as the take-out roller 56 rotates. Here, since the frictional rotational force transmitted from the lower surface of the original Px□ to the separation roller 56 is greater than the frictional rotational force transmitted from the spring joint 62 to the separation roller 59, the lower surface of the original PXI is transmitted to the separation roller 56.
In cooperation with the take-out roller 56, only the uppermost document Px□ is reliably taken out and conveyed away from the roller contact portion without slipping relative to the roller 9.

Next, the document Px by the take-out roller 56 and the separation roller 59
The separation ability of PR to PR will be explained based on FIG. 10(f). The distance from the contact point between the take-out roller 56 and the separation roller 59 immediately before the start of separation to the contact point between the pair of registration rollers 13A and 13B located in front of them in the conveying direction is determined as the contact point between the L1 take-out roller 56 and the separation roller 59. Both rollers 5 are moved from the leading edge of each document caught in the multiple feeding state.
6゜59 Distance to contact part 1□, 1゜, 13...j
2 R%The circumferential speed of the take-out roller 56 is v6, and the separation roller 5 is
If the circumferential speed of 9 is set as VR and 3vF=vR, then 3
(L-, f2□)〉12+13+... The separation action is performed within a range that satisfies 8.

Then, the document P that has been completely separated and fed is moved by the registration rollers 13A and 13A, as described based on FIG.
13B and is waved, and the motor 20 is temporarily stopped.

Then, after a predetermined period of time has elapsed, the motor 20 moves as indicated by the third arrow X
rotated in one direction (opposite direction) so that the first shaft 25. shown in FIG. Second one-way clutch 26B, third timing bell l-220, second shaft 28. 4th and 5th
Drive gear 24D.

24E and first and second registration roller shafts 29A, 2
A pair of registration rollers 13A, 13B via 9B etc.
is rotated, and the document P is conveyed toward the aforementioned conveyance device 3 in accordance with a predetermined timing such as image processing as shown in FIG. 10(m).

Note that if a document jam occurs while the take-out roller 56 and the separation roller 59 are in contact with each other, the arm 50 is automatically turned upside down by operating a roller contact release means (not shown), thereby breaking the contact and easily removing the document P. Mounting table 6B
It is possible to pull it out towards. At this time, the mounting table 6B
Although there is one or more originals P on top, the contact between both rollers 56 and 59 is broken, and the originals P cannot be separated and fed.

Next, the conveyance device 3 will be explained. What is indicated by 3 in FIG. 3 is a schematic representation of the conveying device.
A pair of rollers 70A and 70B, a conveyor belt 71 stretched between both rollers, a power transmission section 72 that transmits power to the roller 70A, and a discharge roller section 73 that is driven by the power from the roller 70B. It is configured. In this device 3, the conveyor belt 71 is driven in the direction of the third arrow X7 based on the rotation of the second shaft 28 which rotates in the direction of the arrow X3 due to the rotation of the motor 20 in the direction of the third arrow X, The original P sent out by the registration rollers 13A and 13B is conveyed to a predetermined position on the original platen glass 4 shown in FIG. 2, and after the copying by the copying machine main body 1 shown in FIG. P is conveyed and discharged onto the document tray 5.

Here, details of the power transmission section 72 will be explained.

FIG. 11 is a detailed perspective view of the vicinity of the power transmission section 72. This power transmission section 72 transmits the rotation of the second shaft 28 as shown in FIG. is cut and the conveying device 3 is rotated in the direction of the first arrow E in the figure, so that the document table glass 4 and the conveying belt 71 are in contact with each other, the rotation of the second shaft 28 shown in FIG. 3 is transmitted. It has become so. That is, as shown in FIG.
8, a holder arm 75 rotatably attached to the second shaft 28, and a holder arm 75 rotatably attached to the second shaft 28;
1. A biasing member 76 that biases rotation in the direction of the arrow shown in the figure, a stopper 77 that engages with the rotationally biased holder arm 75 and locks it at a predetermined position (restricts rotation), and the holder an idle gear 78 that is rotatably supported by the arm 75 and meshes with the sixth drive gear 24F; and an idle gear 78 that can mesh with the idle gear 78 and is attached to the roller shaft 70A' of the roller 70A. and a seventh drive gear 24G.

Therefore, when the conveyance belt 71 and the document table glass 4 are in contact with each other (the state shown in FIG. 11), the rotation of the second shaft 28 is caused by the rotation of the sixth drive gear 24F.

The signal is transmitted to the roller 70A via the idle gear 78 and the seventh drive gear 24G, and the document is frictionally conveyed between the lower surface of the conveyor belt 71 and the upper surface of the document table glass 4. Further, if the original P gets jammed between the original platen glass 4 and the conveyor belt 71, or if the original P is placed directly on the original platen glass 4 without using the separation/feeding device 2, as shown in FIG. In this manner, the conveying device 3 is rotated in the direction of arrow F to open it. Then, the seventh drive gear 24G becomes the idle gear 78.
The holder arm 75 is urged to rotate in the direction shown by the eleventh arrow through the urging member 76, and when the holder arm 75 has rotated by a predetermined amount, the rotation is restricted by the stopper 77. In such a state, even if the motor 20 is driven, the conveyor belt 71 will not rotate, so that work (removal of jammed originals) cannot be performed.

The safety of the manual setting work of the original P is ensured. Further, when the conveyance device 3 is rotated in the direction of arrow E from the state shown in FIG. The holder arm 75 is rotated together with the idle gear 78 in the direction shown in FIG. will be formed. At this time, the seventh drive gear 24G and the idle gear 78 may not mesh in the pitch circle, but when the second shaft 28 is rotated, both gears instantly mesh in the pitch circle to drive the conveyor belt 71. can do. This is due to the action of the biasing force of the biasing member 76 and the biting force due to the pressure force of both gears 24G and 78.

In the above-described embodiments, a case has been described in which the separation and feeding device of the present invention is used for automatic document feeding in a copying machine, but the present invention is not limited thereto. For example, it can be applied to banknote insertion automatic teller machines.

Further, it is also possible to construct the feeding means only by the stopper 10 of the above embodiment, and to simply allow the document P to slide off the mounting table 6B. Further, the conveying means is not limited to one that conveys the leading edge at a timing such as the aligning roller of the above embodiment, but can be replaced with an appropriate structure capable of conveying the document P.

Furthermore, it is possible to replace the feed roller, take-out roller, separation roller, etc. with an endless conveyor belt even if it is not in the shape of a roller, and it goes without saying that various modifications can be made within the scope of the gist of the invention. .

[Effects of the Invention] According to the present invention described in detail above, with the above configuration, the paper sheets stacked in an inclined state can be reliably fed diagonally downward, and the paper sheets can be reliably fed diagonally downward after the feeding operation is finished. It is possible to accurately set the timing with the separation and feeding operation that separates and feeds the end layer from other paper sheets, and with a compact configuration, contributing to the miniaturization of the device. Therefore, it is possible to provide a paper sheet separation and feeding device that can reliably feed stacked paper sheets one by one in order from the outermost layer.

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view of a device according to an embodiment of the present invention applied to a copying machine, Fig. 2 is a schematic side view showing the internal mechanism of a paper sheet separation and feeding device, and Fig. 3 is a paper sheet separation/feeding device. An explanatory diagram showing the drive system of the type separation and feeding device and the conveying device, FIG. 4(a),
(b) is an exploded perspective view showing a part of the drive system; 2.
Figure 5(a). (b) is an exploded perspective view of the clutch, an exploded perspective view of the clutch disengagement section, FIG. 6 is a detailed perspective view of the J section shown in Figure 3, FIG. 7 is a schematic perspective view of the vicinity of the cam lever, FIG. 8 (a), (
b) is an exploded perspective view of the limited power transmission mechanism; FIG. 9 is a schematic perspective view of the document detection unit; and FIGS.
m) is an explanatory diagram of the operation of the separating and feeding device, and FIG. 11 is a schematic perspective view of the conveying device. 6B... Placement table, 10... Stopper, 11... Feed roller, 12... Separation and feeding section, 13A, 13B... Registration roller, P... Document. Front view (b) Do6ha1B Figure (b) Figure 0A 0B Figure (b) b':3 Throat~^ Funeral map

Claims (1)

[Scope of Claims] A paper sheet mounting table arranged at an angle, a feeding means for transporting the paper sheets stacked on the mounting table along the mounting table, and paper sheets conveyed by the feeding means. a conveying means for conveying the paper sheets to the destination; and a separation feeding section for separating and feeding the paper sheets after the driving of the feeding means is finished, and driving the conveying means after the driving of the separation feeding section is finished. A paper sheet characterized by comprising: a driving means; and a pressing means that intermittently performs a pressing operation so as to press the paper sheet from the opposite side to the feeding means when the paper sheet is fed by the feeding means. type separation feeding device.