JPH0565414B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a paper sheet separation and feeding device that sequentially feeds stacked paper sheets one by one starting from the outermost layer.

[Technical Background of the Invention and Problems Therewith] This type of device, for example, allows documents placed in a stacked state on a document table to slide down and feed them to a separating and feeding unit, and then feeding them into a separation and feeding device. 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 apparatus 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, unless the originals in the outermost layer are fed into the separation and feeding section in advance of the other documents below, the originals in the outermost layer cannot be conveyed one by one to the document table. There was a problem. Furthermore, in order to reliably perform the separation and feeding operation, it is necessary to drive the separation and feeding section to control the end of the sliding operation of the document. This has the problem of causing malfunctions due to noise and increasing the size of the device.

[Object 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 feeding operation of the outermost layer of paper sheets after the end of the feeding difference. 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 separation and feeding device for paper sheets that can reliably feed one sheet at a time.

[Summary of the Invention] In order to achieve the above-mentioned object, the present invention includes a paper sheet mounting table arranged at an angle, and a feeding means for conveying the paper sheets stacked on this mounting table along the said mounting table. a pressing means that intermittently performs a pressing operation via a cam mechanism 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; a separation feeding means for separating and taking out the outermost layer of paper sheets fed in from other sheets; and a conveying means for conveying the paper sheets taken out by the separation feeding means to a destination. , a single drive source for driving the feeding means, the pressing means, the separation feeding means, and the conveying means, and a first drive source that transmits only the rotational force of the rotation in the first direction of the driving source to the feeding means.
a second transmission means for transmitting only the rotational force of the rotation of the drive source in the first direction to the cam mechanism of the pressing means; a third transmission means capable of transmitting only rotational force in two directions to the separation feeding means;
and a fourth transmission means for transmitting only the rotational force of the drive source in the first direction to the conveyance means, and when the drive source rotates in the first direction, the first transmission means, the fourth transmission means The second transmission means and the fourth transmission means transmit rotational force to the feeding means, the pressing means, and the conveying means, and when the drive source rotates in the second direction, the third transmission means transmits rotational force to the separation feeding means. It transmits rotational force to 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, 1 indicates the main body of the copying machine, and on one side thereof there is a paper sheet (hereinafter referred to as "manuscript P") which is an embodiment of the present invention.
That's what it means. ) is detachably provided. This document P separation and feeding device (hereinafter simply referred to as separation and feeding device) 2 is a device that sequentially feeds out the documents P input in a stacked state one by one starting from the endmost layer, for example, the topmost layer. Sent manuscript P
The document P is conveyed to a predetermined position on the document table glass 4 by a transport device 3 attached to the back of the copying machine body 1 so as to be openable and closable, and after copying is completed, the document P is conveyed to the document tray 5. It will be done. 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, a paper sheet mounting table (hereinafter referred to as "placing table") that forms part of the bottom surface of the stacking chamber 6A that can accommodate a plurality of documents P in a tilted manner.
6B is provided in an inclined state. This mounting table 6
A pair of side regulating plates 6C are arranged on the upper surface side of B, 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, when setting the original P 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.
When setting the document P in the longitudinal direction,
Rotate it approximately 150 degrees as shown by the dotted chain line and place it on the mounting table 6.
A document support member 6D constituting an extension of B is pivotally mounted.

Here, the outline of the separation and feeding device 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 original P is indicated by the second illustrated arrow A ₁ ,
A A stopper that can swing in _two directions (an example of a pressing means that also has a positioning function that restricts the positioning of the placed filter and continuously presses the stacked documents P when the positioning restriction is released. When this stopper 10 rotates in the direction of the second arrow _A1 in the figure, the document P naturally falls diagonally downward.
Thereafter, when the document P rotates in the _second direction indicated by the arrow A in the figure, the back side of the dropped document P is pressed by the stopper 10. A feeding means, for example, a feeding roller 11, is provided to reliably feed the original forward by contacting the shortest layer of the pressed original P. The feed roller 11 is an example of a feed means that feeds the endmost layer of paper sheets stacked on the mounting table 6B before the other sheets. Furthermore, this feed roller 11 and stopper 1
A separating and feeding section 12 is provided as a separating and feeding means for separating and taking out the outermost layer of originals P sent in a stacked state from other originals P in cooperation with 0. The sent document P passes through a pair of registration rollers 13 provided ahead of it.
A, 13B, and after the timing for transporting the original P is determined here, the original P is transported toward the original platen glass 4. The registration rollers 13A and 13B are an example of a conveyance unit that conveys the document P taken out by the separation and feeding section 12 to the other side. As shown in FIG. 2, a first mylar guide 15A is provided in front of the feed roller 11 to smoothly transfer the stacked documents P to the placing table 6.
It can be placed on B. Further, a second mylar guide 15B is provided above from the folding roller 11 to the separation and feeding section 12,
Further, a third mylar guide 15C is provided below it, so that the document P sent by the feed roller 11 or the like can be sent smoothly and reliably to the separation 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.

In the apparatus of this embodiment, the stopper 10, feed roller 11, separation feed section 12, registration rollers 13A, 13B, etc. are selectively driven by forward and reverse rotation of a single drive source. To do this, first, a drive source such as a motor 20 capable of forward and reverse rotation in the X ₁ and Y ₁ directions shown in the third figure, a first pulley 21A fixed to the motor shaft of this motor 20, and a rotation of the first pulley 21A are required. Second pulley 21B to be transmitted
, 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
A second idle gear 23B that meshes with the idle gear 23A, 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 are provided. 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} . still,
Details of the power transmission system from the motor 20 to the first drive gear 24A are shown in the exploded perspective view and assembled perspective view shown in FIGS. 4a and 4b.

A second drive gear 24B is fixed to the right end of the first shaft 25 in the third drawing via a first one-way clutch 26A that transmits only the rotation of the first shaft 25 in the _Y2 direction. Note that the first one-way clutch 26A is connected to a third one-way clutch that transmits only the power based on the forward rotation of the motor 20 to the separation feeding section 12.
This is an example of a means of communication. Further, a third drive gear 24C to which the rotation of the second drive gear 24B is transmitted, a separation feed shaft 35 that rotates in the third arrow Y3 direction together with the third drive gear 24C, and a separation feed shaft 35 that rotates in the direction of the third arrow _Y3 in the figure. A third pulley 21C fixed to the shaft 35, a fourth pulley 21D to which rotation of the third pulley 21C is transmitted, both pulleys 21C,
Second timing belt 22 stretched on 21D
B, and a take-out roller drive shaft 27 that rotates integrally with the fourth pulley 21D in the direction of arrow _Y4 .

Further, a fifth pulley 21E is connected to the left end of the first shaft 25 in the third drawing via a second one-way clutch 26B that transmits only the rotation of the first shaft 25 in _{the two} directions of the arrow X in FIG. It's fixed. Note that the second one-way clutch 26B transfers only the power based on the rotation of the motor 20 in the opposite direction to the conveying sections 13A and 13B.
This is an example of a fourth transmission means for transmitting to. Furthermore,
The sixth pulley 21F to which the rotation of the pulley 21E shown in FIG. A second shaft 28 that rotates in _three directions is provided. This second
A fourth drive gear 24D is fixed to the third illustrated right end of the shaft 28, and the fourth drive gear 24
A fifth drive gear 24E meshing with D;
A drive gear 24E and a first registration roller shaft 29A rotatable together are provided, and a second registration roller shaft 29A is provided.
One of the registration rollers 13A explained in the figure is the first registration roller 13A.
It is attached to the registration roller shaft 29A of 1 and is rotatable in the direction of the third arrow _X4 in the figure. The other registration roller 13B shown in FIG. 2 is attached to a freely rotatable second registration roller shaft 29B, and is pressed against the registration roller 13A located below through a biasing member (not shown). It's getting old.

Further, a seventh pulley 21G is fixed to the intermediate portion of the first shaft 25, and an eighth pulley 21H to which the rotation from the seventh pulley 21G is transmitted is stretched between both pulleys 21G and 21H. A fourth timing belt 22D and a third shaft 30 that rotates integrally with the eighth pulley 21H are provided. The third shaft 30 is composed of a driving shaft 30A that rotates integrally with the eighth pulley 21H, and a driven shaft 30B that is separated from the driving shaft 30A.
A and 30B are connected and disconnected by a clutch 31. The structure of this clutch 31 will now be explained based on FIGS. 5a and 5b.

In other words, as shown in FIG.
0B, one end of a spring joint 31C is fitted onto the boss portion 31A' of the driving boss member 31A, and the other end of the spring joint 31C is connected to the driven boss member 31B. It is held fixedly. Furthermore, a sleeve 31D is attached to the spring joint 31C.
This sleeve 31B is once fixedly attached to one part of the spring joint 31C, and furthermore, a locking protrusion 31E is disposed on the outer periphery of the sleeve 31D so as to face each other. Furthermore, as shown in FIG. 5b, 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 biased to rotate in the direction of arrow _C1 . Biasing member 3
1H, and a solenoid 31J that rotates the clutch lever 31G in _two directions of arrow C against the biasing force of the biasing member 31H.
K is provided. In such a clutch 31, when the solenoid 31J is demagnetized, the distal end 31G' of the intermittent lever 31G engages with the locking protrusion 31E of the sleeve 31D. Sleeve 31 shown
Since the rotation of D is restricted, the driving boss member 3
1A's boss portion 30A' slips on the inner diameter portion of the spring joint 31C, and the driving shaft 31A
torque is not transmitted to the driven shaft 30B. Also, when the solenoid 31J is energized, the tip 31G' of the intermittent lever 31G is connected to the locking protrusion 31 of the sleeve 31D.
Since the sleeve 31D shown in FIG. 5A becomes free at this time, the sleeve 31D shown in FIG. Therefore, the torque of the driving shaft 30A is equal to the torque of the driven shaft 30A.
It is now transmitted to B.

Next, the stopper 10, the feed roller 11, and the separation feed section 12, which are driven via the first shaft 25, separation feed shaft 35, take-out roller shaft 27, and third shaft, will be explained in detail. The drive system of this part is the part shown in part J in FIG.
It corresponds to the part shown in the figure.

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

As shown in FIG.
direction perpendicular to). This is to uniformly press the document at the tip of the stopper 10. The other end of the stopper holding member 40 is fixed to a cam lever shaft 42 constituting a second transmission means, and a cam lever 43 is attached to the end of this shaft 42. 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 sixth position.
In order to swing in the directions of the arrows A ₁ and A ₂ shown in the figure and the second figure,
As shown in FIG. 7, a cam 44 is attached to the driven shaft 30B of the third shaft 30. However, cam 4
4, the stopper 10 moves as shown in FIGS. 2 and 6.
The document P shown in FIG _{. 2} will naturally fall diagonally downward when rotated in the direction of arrow _A1 , and then rotated in the direction of arrow _A2 .
The back surface of the fallen document P is pressed by the stopper 10 and is pushed diagonally upward. still,
A friction braking member (not shown) is provided at the tip of the stopper 10, that is, at 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, a first drive sprocket 52 is attached to the driven shaft 30B of the third shaft 30.
The second drive sprocket 5 is connected to the feed roller shaft 51 via the third one-way clutch 26C, which is attached so as to be integrally rotatable with the drive sprocket A and which transmits rotation only in the direction of arrow _X5 shown in FIGS. 3 and 6 to the feed roller shaft 51.
2B is provided on the feed roller shaft 51,
A first ladder chain 53A is stretched between both sprockets 52A and 52B. Note that the third one-way clutch 26C is an example of a first transmission means that transmits only the power based on the rotation of the motor 20 in the opposite direction to the feeding section 11. Therefore, the feed roller 11 has the third driven shaft 30B.
When the document is rotated in the direction of arrow _X5 shown in FIGS. 3 and ₆ , it is rotated in the direction of arrow X6 shown in FIGS. It will send friction to. 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 take-out roller 56 integrally rotatably attached to the take-out roller shaft 55;
A fourth drive sprocket 52D fixed to the intermediate portion _of
A third drive sprocket 52C is attached to the take-out roller shaft 27 via a one-way clutch 26D, a second ladder chain 53B is stretched across both sprockets 52C and 52D, and the separation shown in FIG. A limited power transmission mechanism 58 is provided on the feeding shaft 35 and transmits the rotational torque of the separation feeding shaft 35 within a certain range, and the torque is transmitted via the limited power transmission mechanism 58. The separation roller 59 is arranged opposite to the take-out roller 56. Note that the pair of arms 50 are urged downward in FIG. 6 by an unillustrated urging member, so that the take-out roller 5
6 and the separation roller 59 are in contact with each other with a constant pressure.

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 outside of 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 axial torque of the separation roller shaft 35 is transmitted to the separation roller boss 61 on which the separation roller 59 is attached by the frictional 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. It's getting old. Further, when a certain braking torque is applied to the separation roller boss 61 via the separation roller 59, the cylindrical portion 61a of the separation roller boss 61 slips on the inner diameter portion of the spring joint 62, so that the rotation of the separation roller 59 is restricted. It's summery. 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 original, and has a well-finished surface to prevent paper waste, etc. It is designed to cope with changes over time due to adhesion.

Therefore, the take-out roller 56 is
The separation roller ₅₉ rotates in the direction of the third arrow _Y3 , but both rollers 5
When a plurality of originals P are stacked and are in contact with the nip portions 6 and 59, the uppermost original P is sent forward by the rotation of the take-out roller 56, and the originals P below it are sent to the other side by the rotation of the take-out roller 56. The rotation of 59 causes it to be returned in the opposite direction. This is because the limited power transmission mechanism 58 does not slip due to friction between the documents P. As a result, only the uppermost document P is reliably taken out. When transporting the retrieved original P, the original P that is being transported is
Since the frictional force between the document P 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 the document P causes the separation roller 59 to reverse. Incidentally, when the uppermost document P is being conveyed and the document below it 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 _Y3 direction in the third figure as described above. It will rotate and return 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 includes a rod 66 fixed to a frame (not shown), a detection lever 67 rotatably provided on the rod 66, and a driven shaft 30B of the third shaft 30.
a release cam 68 that is fixed to the detection lever 67 and can be engaged with the back surface of the detection lever 67; and a detection section 6 that optically detects the presence or absence of the tip end 67A of the detection lever 67.
9, and the document P in a stacked state.
When the document P is inserted from the direction D shown in FIG.
9, it is determined that there is a document, and when the document P is gone, the tip 67A of the detection lever 67
As a result of shutting off the detector 68, it can be determined that there is no document.

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

FIG. 10a is an explanatory diagram of the state before inputting the original.
First, a plurality of originals P are piled up and placed in the stacking room 6A.
Put it inside. The original P inserted into the collection chamber 6A is detected by the detection lever 6 as shown in FIG. 10b.
7 is pushed away and the detector 68 is made non-interrupted, thereby detecting the presence of paper. And accumulation room 6
The document P placed in A is secured to both sides of the loading table 6B by a side regulating plate 6C, a stopper 10 protruding toward the lower end of the loading table 6B, and a feed roller 11 in contact with the stopper 10. The distal end is held in the positioned position.

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 3
1J is excited. When the solenoid 31H is energized, the clutch 3
1 is in the connected state, and the rotation of the motor ₂₀ in the
A is transmitted to the driven shaft 30B, and this shaft is rotated in the direction X5 in the third diagram.

Due to this rotation, the first drive sprocket 52A and the second drive sprocket 52
B, 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. The cam lever 4 is biased against the
3. The stopper 10 is rotated and lowered in the direction of arrow _A1 in FIG. 10c via the cam lever shaft 42 and the like. Then, as shown in FIG. 10c, 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. The document P pressed against the feed roller 11, that is, the top layer document P, bites into the contact portion between the take-out roller 56 and the separation roller 59 by the feed roller 11 rotating in the _X6 direction in FIG. 10c.

This operation is performed during one rotation of the driven shaft 30B, and when the driven shaft 30B is rotated one more time, the same operation as shown in FIGS. 10c and 10d is performed (FIG. 10e). , 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 reversely rotated in the third arrow _Y1 direction (forward direction). Then, the first shaft 25, first one-way clutch 26A, separation feed shaft 35, take-out roller drive shaft 27, fourth one-way clutch 26A, separation feed shaft 35, take-out roller drive shaft 27, shown in FIG. 4th one-way clutch 26D
and the take-out roller 5 via the take-out roller shaft 55, etc.
6 rotates at a low speed of about 100 mm/sec in the direction of arrow Y ₅ in Figure 10 g, and at the same time rotates in the direction of arrow Y 5 shown in Figure 10 at a low speed of about 100 mm/sec.
The separating roller 59 is attempted to be rotated in the opposite direction to the feeding direction of the document P by the action of the separation feeding shaft 35 rotating in the _Y3 direction and the limited power transmission mechanism 58. At this time, as shown in FIG. 10h, at the moment when the uppermost document P ₁ or the document _P The frictional rotational force transmitted to the separation roller 59 is transmitted via the spring joint 62 shown in FIG. 8a.
Exceeding the reverse friction rotational force of 9, the take-out roller 5
6 rotates in the forward direction as a driving roller, the separation roller 59 rotates in the forward direction as a driven roller, and the separation roller 59 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 P ₁ or _P Invite. Note that due to the difference in frictional resistance, the separation roller 59 rotates in the direction to take out the original _P1 when one sheet is taken out, and in the direction to return the original _PX when two or more sheets are taken out. Then, as shown in FIG. 10g, 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.
As shown in FIG. 10j, the leading edge of the document P bites into the contact portions of the registration rollers 13A and 13B provided in front of it, and the document is waved between the take-out roller 56 and the registration rollers 13A and 13B, and the leading edge is The motor 20 is temporarily stopped with the deviation corrected.

Here, we will discuss the document feeding and separating functions between the take-out roller 56 and the separating roller 59 in the 10th section.
Further details will be given with reference to Figures k and l.

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, there is no guarantee that originals P of different paper quality will be mixed and arranged, or that the originals P will be separated in an ideal step-like manner (the original P located below the top original P will be separated from the take-out roller 56). (There is a very rare chance that the roller 59 may bite into the contact portion.) Separation is performed by the action of the take-out roller 56 and the separation roller 59, which are activated with a time delay as described above. In reality, two or more originals P are transferred to both rollers 56 and 59 in any form.
The moment the roller 56 is caught in the contact area of the
is shown in Figure ₁₀ (frictional conveyance force transmitted to the top original P _X1 , conveyance of P _X2 and P _X2 (or _P The force is transmitted as a frictional conveyance force to the upper surface of the document _PR that is in contact with the separation roller 59. However, on the other hand, it is transmitted via the spring joint 62 shown in FIG. A return force is transmitted from the separation roller 59 under load to the document P _R. This is due to the frictional conveyance force transmitted by the separation roller 59 to the document P _R rather than the frictional conveyance force between the documents received from the take-out roller 56. This is possible by setting a large force.

Therefore, the original P _R is returned toward the mounting table 6B by the action of the separation roller 59, and the original above it is
P _X1 , P _X2 (P _X3 ) move in the take-out direction under the action of the take-out roller 56. Here, the reversal circumferential speed V _R of the separation roller 59 is set to approximately three times V _F with respect to the circumferential speed _V F of the take-out roller 56 _, and the original P Assuming that the original is in contact with the separation roller 56
_PR will be moved back approximately 30mm. However, if the distance l (not shown) from the contact area between the take-out roller 56 and the separation roller 59 to the leading edge of the original _PR at the moment when separation is started is 30 mm or less (x), then l-
_{The return amount of x is P X2 (} or
P _X3 ) as a return amount and is instantly pushed back. This is repeated to perform a separation action, and the document P _X1 comes into contact with the lower surface of the document P The separation roller 59 continues to try to push back the document P _X1 , but a spring joint ₆₂ shown in FIG. From the top surface, the document _P Since the frictional conveyance force transmitted by the roller 56 to the upper surface of the document P _X1 is much larger than the frictional force transmitted from the spring joint 62 to the separation roller 59,
P _X1 is taken out and conveyed as the take-out roller 56 rotates. Here, the frictional rotational force transmitted by the lower surface of the _original P
Since this is larger than the frictional rotational force transmitted to the separation roller 59, the lower surface _of the original _P It will be transported.

Next, the ability of the take-out roller 56 and the separation roller 59 to separate the _{documents P} A pair of registration rollers 13A, 1 located forward in the conveying direction from the contact portion between the take-out roller 56 and the separation roller 59, which are in a state immediately before the start of separation.
The distance to the contact part of 3B is L, and the take-out roller 56
Both rollers 56 and 59 start from the leading edge of each document that is caught in the contact area of the separation roller 59 in a multiple feeding state.
Assuming that the distance to the contact part is l ₁ , l ₂ , l ₃ ...l _R , the circumferential speed of the take-out roller 56 is V _F , and the circumferential speed of the separating roller 59 is V _R , and 3V _F =V _R , then 3 (L−l ₁ )＞l ₂ +l ₃
Separation action is performed within the range that satisfies +...l _R.

The document P that has been completely separated and fed is
As explained based on FIG. 10j, it is brought into contact with the registration rollers 13A and 13B and waved,
The motor 20 will be temporarily stopped. After a predetermined period of time has elapsed, the motor 20 is rotated in the third arrow _X1 direction (reverse direction), and as a result, the third
The first shaft 25, second one-way clutch 26B, third timing belt 22C, second shaft 28, fourth and fifth drive gears 24D, 24 shown in the figure
E and the first and second registration roller shafts 29A,
A pair of registration rollers 13 via 29B etc.
A and 13B are 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. 10m.

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 raised by operating a roller contact release means (not shown), thereby breaking the contact and easily removing the document P. It becomes possible to pull it out toward the mounting table 6B. At this time, the document P is placed on the mounting table 6B.
Although one or more sheets exist, the contact between both rollers 56 and 59 is broken, and the document P cannot be separated and fed.

Next, the conveyance device 3 will be explained. What is indicated by 3 in FIG. 3 schematically shows the conveying device, which includes a pair of rollers 70A, 70B,
a conveyor belt 71 stretched between both rollers; a power transmission section 72 that transmits power to the roller 70A;
The discharge roller section 73 is driven by the power from the roller 70B. 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 _X1 . , the document P sent out by the registration rollers 13A and 13B is transferred to the second
The document is transported to a predetermined position on the document platen glass 4 shown in the figure,
After the copying by the copying machine main body 1 shown in FIG. 2 is completed, the original P is conveyed again and discharged onto the original 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, the conveying device 3 is rotated in the direction of the first arrow E, and the original platen glass 4 is rotated.
When the conveyor belt 71 is in contact with the third
The rotation of the second shaft 28 shown in the figure is transmitted. That is, as shown in FIG.
The sixth drive gear 24F is integrally rotatably attached to the middle part of the shaft 28, the holder arm 75 is rotatably attached to the second shaft 28, and the holder arm 75 is rotated in the direction of the eleventh arrow L in the figure. A biasing member 76 for movably biasing, a stopper 77 for engaging the rotatably biased holder arm 75 to lock it at a predetermined position (restricting rotation), and a stopper 77 for rotatably pivoting to the holder arm 75. supported, and said sixth
Idle gear 7 meshing with drive gear 24F of
8, and a seventh drive gear 24G which can mesh with this idle gear 78 and is attached to the roller shaft 70A' of the roller 70A.

Therefore, when the conveyor 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 24.
F, idle gear 78 and seventh drive gear 2
4G to the roller 70A, 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. In addition, the document P may become jammed between the document table glass 4 and the conveyor belt 71, or the document P may be directly transferred without using the separation/feeding device 2.
When placing a document on the document table glass 4, the conveying device 3 is rotated in the direction of arrow F as shown in FIG. 1 to open it. Then, the seventh drive gear 24G separates from the idle gear 78, and the holder arm 75 is urged to rotate in the direction of the eleventh arrow L shown in the figure via the urging member 76, and when the seventh drive gear 24G rotates by a predetermined amount, the stopper 7
7, its rotation is regulated. In such a state, even if the motor 20 is driven, the conveyor belt 71 will not rotate, so that the work (removal of a document jam, manual setting of the document P) is not possible.
safety 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 K direction in FIG. 11 against the resistance, and the power transmission system from the sixth drive gear 24F to the seventh drive gear 24G is rotated as shown in FIG. will be formed. At this time, the seventh drive gear 24G and the idle gear 78 may not mesh in a pitch circle, but if the second shaft 28 is rotated, both gears instantly mesh in a 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 angle of both gears 24G, 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, the feeding means is the stopper 1 of the above embodiment.
It is also possible to have a structure in which the document P is simply slid down from the mounting table 6B. moreover,
The conveying means is not limited to one that conveys the document P at the timing of the leading edge, such as the aligning roller of the above embodiment, but can be replaced with an appropriate structure that can convey the document P.

Furthermore, it goes without saying that the feed roller, take-out roller, separation roller, etc. can be replaced with an endless conveyor belt even if they are not roller-shaped, and that various other modifications can be made within the scope of the gist of the present invention. .

[Effects of the Invention] According to the present invention described in detail above, with the above configuration, it is possible to reliably feed the paper sheets stacked in an inclined state diagonally downward, to press the paper sheets at the time of feeding, and to perform the feeding operation. After the operation is completed, the separation and feeding operation and conveyance operation of the outermost layer of paper sheets one by one are performed by rotation of one drive source in the first and second directions and transmission of the first to fourth sheets. It can be performed in temporally divided manner by transmitting the rotational force by means of means.

Therefore, operations that were conventionally performed using two or three drive sources can be realized with only one drive source, simplifying the configuration and contributing to the miniaturization of the device. No electrical control is required.

Furthermore, since the rotations of one drive source in the first direction and the second direction never occur at the same time, if the rotational force of the drive source in the first direction is transmitted to the feeding means by the first transmission means. Similarly, the rotational force in the first direction is transmitted to the pressing means by the second transmission means,
Separation is performed by transmitting the rotational force of the drive source in the second direction to the separation and feeding means via the third transmission means, unless the sheet is pressed to ensure a reliable feeding operation. No feeding operation is performed, and furthermore, the paper sheets that are separated and fed are rotated by the drive source in the opposite direction to that during the separation and feeding operation. Thereby, it is possible to provide a paper sheet separation and feeding device that can reliably perform paper sheet feeding and conveyance operations. Furthermore,
Since the pressing operation on the paper sheet at the time of feeding is performed by the cam mechanism along with the feeding operation, there is no need to use electrical elements such as solenoids, and moreover, the operation can be performed simultaneously with the pressing operation of the paper sheet. This has the unique effect of being able to have a simplified configuration.

[Brief explanation of the drawing]

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. 4A and 4B are exploded perspective views and assembled perspective views showing a part of the drive system, and FIGS. 5A and 5B are exploded perspective views of the clutch. Fig. 6, exploded perspective view of clutch discontinuing part.
The figure is a detailed perspective view of the J section shown in Figure 3, Figure 7 is a schematic perspective view of the vicinity of the cam lever, Figures 8a and b are exploded perspective views and assembled perspective views of the limited power transmission mechanism, and Figure 9 is the document detection section. 10A to 10M are operation explanatory views of the separating and feeding device, and FIG. 11 is a schematic perspective view of the conveying device. 6B...Placement stand, 10...Stopper, 11...
Feed roller, 12...separation feeding section, 13A,
13B...Registration roller, P...Manuscript.

Claims (1)

[Scope of Claims] 1. A paper sheet mounting table arranged at an angle, a feeding means for conveying the paper sheets stacked on this mounting table along the said placing table, and a sheet feeding means for conveying the paper sheets stacked on the feeding table. a pressing means that performs a pressing operation intermittently via a cam mechanism so as to press the paper sheet from the opposite side to the feeding means during the feeding operation; a separating and feeding means for separating and taking out the paper sheets in the outermost layer from other sheets; a conveying means for conveying the sheets taken out by the separating and feeding means; the feeding means, the pressing means; a single drive source for driving the separation feeding means and the conveying means; a first transmission means for transmitting only the rotational force of rotation in a first direction of the drive source to the feeding means; and the drive source. a second transmission means for transmitting only the rotational force of the rotation in the first direction to the cam mechanism of the pressing means; and the rotational force of the rotation of the drive source in a second direction different from the first direction. and a fourth transmission means that transmits only the rotational force of the drive source in the first direction to the conveyance means, wherein the drive source is When rotating in the first direction, the first transmission means, the second transmission means, and the fourth transmission means transmit rotational force to the feeding means, the pressing means, and the conveying means, and the driving source 2. A separating and feeding device for paper sheets, wherein the third transmission means transmits rotational force to the separating and feeding means when rotating in the direction shown in FIG.