JPS6097149A - Paper-sheet feeding apparatus - Google Patents

Abstract

PURPOSE:To smootly transport and guide paper sheets after positioning and stop by installing a stop member integrally onto a guide means, in the captioned apparatus in which the paper sheets which are allowed to stop at a prescribed position by the stop member are transported through the guide means. CONSTITUTION:The original-copy feeding apparatus 1B of a copying machine is constituted of a separating feeding apparatus 2 and a transport part 3, and the original-copy transported one by one from the separating feeding apparatus 2 is transported to a prescribed position on a light exposure board 4 in the transportation part 3, and after copying is completed, said original-copy is discharged onto a paper discharging tray 308 through a curved guide (guide member) 310. In this case, the curved guide 310 is supported in swingable ways, having the intermediate part as fulcrum, and a stop member 351 formed by applying the soft member 350 such as rubber, etc. onto the bent surface 310B at the rear edge of the guide 310 is installed. The original copy is allowed to stop and is positioned by projecting the stop member 351 from the original-copy loading surface of the light exposure board 4, and the original copy can be discharged onto the tray 308 side by retreating the member 351.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention 1] The present invention relates to a paper sheet feeder applied to an automatic document feeder or the like.

[Technical disadvantages of the invention and its problems] As a paper sheet feeding device, for example, a plurality of originals are taken out one by one, conveyed to the exposure position of a copying machine, and after the exposure is completed, the originals are ejected. An example of this is a device that automatically feeds documents in sequence.

In such a device, a conveyor belt that comes into contact with and conveys the original on the document table glass surface, which is a paper sheet placement surface, is provided so as to be able to approach and separate from the document table glass surface, and this conveyor belt A stopping member is provided for stopping the document conveyed by the scanner at the exposure position against the conveying force thereof. Then, the document subjected to exposure is made to turn in a U-turn via a guide member and is discharged above the conveyor belt.

However, in conventional devices, the guide member and the stop part were provided separately and independently, so when the original at the exposure position was ejected after exposure, there was a problem in the transfer from the stop member to the guide member. There was a problem that document jams were likely to occur. This was particularly noticeable when the document was curled.

[Object of the Invention] The present invention has been made in view of the above circumstances, and its purpose is to be able to smoothly guide paper sheets that have been stopped by the stop member to the guide member, and to achieve tJ.
It is an object of the present invention to provide a sheet sequential feeding device capable of preventing paper sheets being ejected from becoming jammed.

[Summary of the Invention] In order to achieve the above-mentioned object, the present invention includes a conveying means that contacts and conveys the paper sheets on the paper sheet placement surface, and a conveyance means that conveys the paper sheets on the paper sheet placement surface. A stop member that stops the paper sheets coming into contact against the conveyance force from the conveyance means, and a stop member that stops the paper sheets that are conveyed by the conveyance means again after stopping for a predetermined time in a direction opposite to the conveyance direction by the conveyance means. In the paper sheet sequential feeding apparatus, the guide member is integrally provided with the stop member, and the guide member is movable so as to cause the stop member to appear and retract from the paper sheet placement surface. It is characterized by being configured.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic perspective view of an embodiment of the present invention applied to a copying machine equipped with an automatic document feed function. In FIG. A leaf sequential feeding device (hereinafter also referred to as document feeding device > 18) is provided.
A feeding device 2 is provided on one side of A. This paper sheet feeding device (hereinafter also simply referred to as separation feeding device) 2 is as follows:
This is a device that sequentially feeds paper sheets, such as original documents, input in a stacked state one by one, starting from the outermost layer, such as the top layer. The sent document is transported to a conveyor 1 (hereinafter referred to as the conveyor device) which has one end pivotally supported on the rear surface of the copying machine main body 1A and is arranged so as to be able to be separated from the exposure table (hereinafter also simply referred to as document table glass) 4. 3, the document is sent to a stop position (exposure position) on the document table glass 4, and after the copying of the document is completed, the document is sent to the Jfl document tray 5. ) What is indicated by I is a document stopping means that stops the document conveyed onto the document platen glass 4 at the exposure position against the conveyance force of the conveyance unit 3, for example, and is arranged so as to cross the document conveyance direction so as to be adjustable in position. It is placed in the direction of In this way, new documents are sent one after another through the separation and feeding device 2 and are provided for copying. The configuration of the stacking section 6 on which stacked documents are placed in the separation/feeding device 2 is as follows.In other words, a plurality of documents can be accommodated at once in an inclined state. A mounting table 6B forming a part of the bottom surface of the stacking chamber 6Δ is installed in an inclined state. On the upper surface side of this mounting table 6B, a plate is placed in a direction perpendicular to the feeding direction according to the original size. A pair of side regulating plates 6c that can be slid freely are arranged.Furthermore, at the inclined upper end, when a document is set in the transverse direction, it can be rotated and stored on the placing table 6B as shown by the solid line in the first figure. , when setting the original in the longitudinal direction, as shown by the two-dot chain line in the first figure = 5
A document support member 6D, which is rotated by approximately 150° and constitutes an extension of the mounting table 6B, is pivotally attached. Further, a cover 6F that can be opened and closed is provided on the upper part of the separating and feeding device 2.

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. What is indicated by 6B in the figure is the above-mentioned mounting table,
Documents P are placed in a stacked state. Document P placed on it
is a stopper that can swing in the directions of arrows Ai and A2 shown in Fig. 2; This is an example of a positioning pressing part.
The positioning is regulated by a slider (which is an example of a sliding part) 10 that causes the original on the mounting table 6B to slide down due to its own weight, and when this stopper 10 rotates in the direction of arrow A1 shown in FIG. slides diagonally downward under its own weight. A friction braking member, for example, a urethane rubber band 6--1 to 101, is installed on the guide plate 100 via the third mylar guide 15C, which applies frictional braking by coming into contact with the tip of at least a part of the document that has slipped down in the stacked state. By providing such a urethane rubber seam 1-101, documents that slide down in a stacked state will be frictionally braked by their own weight and will not slide sideways to the left in FIG. 2.

Thereafter, when the document is rotated in the direction of arrow A2 shown in FIG. A feeding unit, for example, a feeding roller 11, is provided to feed the document into the paper.The feeding roller 11 and the stopper 10 work together to separate the outermost layer of the document from the other document and send it to the other side. A separating and feeding section 12 is provided for feeding the separation and feeding device 2.
A single document sent from the 11 in the transport device 3
It is fed out a sufficient distance to reach the contact portion between the zero feed belt 71 and the registration roller 306 held on the side of the copying machine main body 1A. At this time, the conveyance belt 71 which is in a stopped state corrects the deviation of the leading edge of the document, is driven to convey in synchronization with the processing timing on the copying machine main body side, and conveys the document to the document table glass 4. As shown in FIG. 2, a first mylar guide 15A is provided in front of the feed roller 11 in the tangential direction of the roller 11, so that the leading edge of the document in the L-most layer of the stack is aligned. Even if it is curled in a concave shape, it can be placed smoothly on the mounting table 6B. Further, a second mylar guide 1 is provided above the feed roller 11 to the separation feeding section 12.
5B is installed, and together with the third mylar guide 15C, the document sent by the feeding 1 roller 11 etc. can be smoothly and reliably fed to the separation feeding section 12. Further, a fourth mylar guide 15D bent in an approximately "<1" shape is provided at the front end of the third mylar guide 15C, facing the upper guide 103. The document taken out from the document 12 and conveyed is shaped upwardly by the fourth mylar guide 15D and the upper guide 103, and its tip is guided to the nip portion of the registration 1 roller 306 between the conveyance bell 1-71 and the document conveyance belt 1-71. 7- It should be noted that this fourth mylar guide 150
Since the leading end (with respect to the document conveyance direction) is not fixed, it becomes substantially flat when a pressing force is applied from above.

Next, the apparatus of this embodiment will be described in detail with reference to FIG. 3, without showing the drive system of the portion feeding apparatus 2.

The device of this embodiment includes the stopper 10, the feed roller 1
1. The separation and feeding section 12 is selectively driven by forward and reverse rotation of one drive source. For this purpose, first, a drive source, for example, a third right end in the figure, a motor 20 capable of forward and reverse rotation in the Y1 direction.
A first pulley 21A fixed to the motor shaft of this motor 20, a second pulley 21B to which the rotation of the first pulley 21A is transmitted, and a first pulley 21B stretched between both pulleys 21A and 21B. Timing belt 22A and second pulley 2
A first idle gear 23A that rotates integrally with the first idle gear 1B;
The second idle gear 2 meshing with the idle gear 23A of
3B, a first drive gear 24Δ that meshes with the second idle gear 23B, and a first shaft 28-5 that rotates integrally with the first drive gear 24A. Motor 20 ×
It rotates in the x2 direction when it rotates in one direction, and rotates in the Y2 direction when it rotates in the Y1 direction. The details of the power transmission system from the motor 20 to the first drive gear 24Δ 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. Further, a third drive gear 24c to which the rotation of the second drive gear 24B is transmitted, a separation feed shaft 35 rotating in the third illustrated arrow Y3 direction together with the third drive gear 24C, etc. A third pulley 21G fixed to the shaft 35, a fourth pulley 21D to which the rotation of the third pulley 21C is transmitted, and both pulleys 21G, 21
The second timing belt 22B stretched on D and the fourth timing belt 22B
A take-out roller drive shaft 27 that rotates integrally with the pulley 21D in the direction of arrow Y4 is provided.

Further, a seventh pulley 21G is provided at the intermediate portion of the first shaft 25.
is fixed to the eighth pulley 211 to which the rotation from the seventh pulley 21G is transmitted, and both pulleys 21G, 2
A fourth timing bell l-22D stretched to 1H,
A third shaft 30 that can rotate integrally with the eighth pulley 211 is provided. The third shaft 30 is configured such that transmission of the rotational driving force of the eighth pulley 211 is interrupted and interrupted by the clutch 31. Here, the structure of this clutch 31 and the like will be explained based on FIGS. 5(a), (b), and (c). FIG. 5(a) is an exploded perspective view of the clutch 31, FIG. 5(b) is an assembled side view, and FIG. 5(C) is a schematic perspective view of the clutch disengagement portion. Said third
Both ends of the shaft 30 are rotatably supported by a frame (not shown). Further, as shown in FIG. 5(a), the eighth pulley 211 has a support hole 30a through which the third shaft 30 is rotatably supported. The inserted third shaft 30 is an E-ring 30D.
11- positions and supports the pulley 21H.

The narrow end of the eighth pulley 211 has a rod-shaped cylindrical portion 3.
0Δ, and a coupling protrusion 301] is formed at its tip. The clutch 31 has the following configuration. That is, as shown in FIGS. 5(a) and 5(b), the driving boss member 31A has a boss portion 31B having a length of 1-1 at one end, and penetrates through both end surfaces of the boss portion 31B to rotate the third shaft. The cylindrical portion 30A of the eighth pulley 211-1 is freely supported and
A through hole 31C is provided for inserting and supporting the tip of.

Further, a locking groove 31Ca for locking the coupling protrusion 30b of the cylinder portion 30A is provided at one end of the through hole 31C into which the cylinder portion 30A is inserted.
can rotate integrally with the eighth pulley 211. The boss portion 31B includes a coil-shaped clutch spring 31F, which has an extending portion 31D with one end extending horizontally and an upright portion 31E with the other end formed in an upright manner.
is fitted externally. The coil length 1- of this clutch spring 31F is equal to the boss portion 31 of the driving boss member 31A.
It is approximately equal to the length Ll of B12-. On the other hand, the driven boss member 3 has a locking groove 31D that locks the circular portion 31D.
1M has a stepped hole 31H passing through both end faces as shown in FIG. . and,
A set screw 31L screwed into the threaded portion 31J fixes the third shaft 30 inserted into the stepped hole 31H and the driven boss member 31M. The cam 44 has a boss portion 44A having a through hole 44B through which the third shaft 30 is inserted, and this boss portion 44A is inserted into the stepped hole 31H of the driven boss member 31M and is screwed into the threaded portion 31T. It is fixed to the driven boss member 31M by a set screw 31K. Furthermore, as shown in FIG. 5 <C), near the clutch spring 31F, there is an intermittent lever 31P swingably provided on the base 31N, and the intermittent lever 31P is rotated in the direction of arrow C1. A biasing member 31Q that biases and an intermittent lever 31P
A clutch disconnection section 31S is provided, which includes a solenoid 31R that rotates in the direction of arrow C2 against the biasing force of a biasing member 31Q.

In such a latch 31, the solenoid 3
When 1R is demagnetized, the distal end 31P' of the intermittent lever 31P engages with the upright part 31E of the clutch spring 31F, and at this time, the rotation of the clutch spring 31F shown in FIG. 5(a) is regulated. So,
The boss portion 31B of the driving boss member 31A slips on the inner diameter portion of the clutch spring 31F, and the torque of the eighth pulley 21H is not transmitted to the driven boss member 31M. Also, when the solenoid 31R is energized, the intermittent lever 31P
The tip 31P" of the clutch spring 31F is designed to come off the upright part 31E of the clutch spring 31F, so that the clutch spring 31F
rotates integrally with the eighth pulley 21 +-1. Therefore, the rotation is transmitted to the driven boss member 31M that locks the extension portion 31D of the clutch spring 31F, and the output rotation of the eighth pulley 21 is transmitted to the third shaft 30 fixed to the driven boss member 31M. It turns out.

On the other hand, the displacement phase between the upright portion 31F of the clutch spring 31F and the cam 44 has a mechanically important meaning, and the phase of the swinging motion of the stopper 10 is determined based on the rotational displacement of the cam 44. .

It is extremely difficult to maintain this phase constant due to cumulative errors that occur between the members interposed to connect the clutch spring 31F and the cam 44.

In the clutch 31 having the above structure, the phase error is reduced by coupling only the driven boss member 31M, and the fixation of the cam 44 to the driven boss member can be finely adjusted by the set screw 31K. Furthermore, the clutch 31 is also made smaller by reducing the number of members that make up the clutch 31.

Next, the stopper 10, the feed roller 11, and the separation feed 12, which are driven via the first shaft 25, the feed shaft 35, the take-out roller shaft 27, and the third shaft, will be explained in detail. . The drive system of this part is the part shown at part 0 in 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 designed to be able to swing slightly (in a direction perpendicular to the feeding direction of the document P) via a bottle 41 set in the center of one end of a stopper holding member 40. (This is because the tip of the stopper 10 presses the document uniformly.)

The other end of the stopper holding member 40 is fixed to a cam lever shaft 42, and a cam lever 4 is attached to the end of the shaft 42.
3 is installed. A biasing portion vI/'I3A is attached to the cam lever 43, and constantly biases the cam lever shaft 42 to rotate in the direction A2 in the sixth figure. Then, actuate this cam lever 43 to move the stopper 10 as shown in FIGS. 6 and 2.
In order to swing in the directions of arrows Δ1 and A2 shown in the figure, the cam I'14 is attached to the third @30 as shown in FIG. As a result, the cam lever 43 is driven by the rotation of the cam 44, and the stopper 10 moves in the direction of the arrow shown in FIGS. 2 and 15-6. When the original P shown in FIG. The back side is pressed and pushed diagonally upward.

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
A first drive sprocket 52A is attached to the drive sprocket 52A so as to be integrally rotatable, and a third drive sprocket 52A is attached to the drive sprocket 52A so as to be integrally rotatable.
A second drive sprocket 1-52B is provided on the feed roller shaft 51 via a one-way clutch 26C, and a first ladder chain 53A17-16- is stretched between both sprockets 52A and 52B. Therefore, the feed roller 11
When the third shaft 30 is rotated in the 5 directions indicated by the arrows in FIGS. 3 and 6, it is rotated in the 6 directions indicated by the arrows in FIGS. It contacts the top layer and sends it forward by friction. 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 Nt feeding section 12 includes a take-out roller shaft 55 rotatably inserted near the free ends of the pair of arms 50, and both ends of the take-out roller shaft 55. A take-out roller 56, which is a feeding means, is integrally rotatably attached to the take-out roller shaft 55; A third drive sprocket 52C provided on the take-out roller shaft 27 via a fourth one-way clutch 26D that transmits only rotation in the direction of arrow Y4 shown in FIGS. ladder chain 53B, etc., a limited power transmission mechanism 58 that is provided on the separation feed shaft 35 shown in FIG. 3 and transmits the rotational torque of the separation feed shaft 35 within a certain range; via mechanism 58]-
The separating roller 59 serves as a separating means and is disposed opposite to the take-out roller 56 to which the pulling force is transmitted. Note that the pair of arms 50 are urged downward in FIG. 6 by pressure springs 200, 200, which will be described later, so that the take-out roller 56 and separation roller 59 are in contact with each other with a constant force W. .

The limited power transmission mechanism 58 is as shown in FIG. 8, and the portion #10-ra 59 is attached to a separation roller boss 61 made of resin and rotatably fitted onto the separation roller shaft 35. At the same time, the spring joint 62 is located on one end surface side of the separation roller boss 61 and is connected to the separation roller shaft 3.
5 is fitted externally. 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 a separation roller is attached to the sacral end of the spring joint 62. -〇The cylindrical portion 61a protruding from one side end face of the labosu 61 is fitted onto the outside with its inner diameter portion tightened.

Then, the axial torque of the separation roller shaft 35 is transferred to the IC separation roller boss 61 by the separation roller 59 with a limit slipping force caused by the friction between the inner diameter part of the spring joint 62 and the outer circumferential surface of the cylindrical part 618 of the separation roller boss 61. It is meant to be transmitted. Therefore, when a force exceeding the limit shear force T acts on the separation roller boss 61 via the separation roller 59 and a constant braking torque, slippage occurs between the cylindrical portion 61a of the separation roller boss 61 and the inner diameter portion of the spring joint 62. , the simultaneous rotation of the separation roller 59 is strictly controlled. The separating roller 59 is made of an IC material that obtains a constant braking force through friction with the original, and is made of, for example, urethane rubber material with a hardness of 80°, and has a well-treated surface to prevent paper scraps and the like. It is designed to be able to respond to changes over time depending on the number of necks.

As a result, the take-out roller 56 rotates in the direction of the third arrow Y5, and the separating roller 59 rotates in the direction of the third arrow Y5.
When a plurality of originals are stacked and in contact with the nip section 59, the topmost original is sent forward by the rotation of the take-out roller 56, and the originals below are sent in the opposite direction by the rotation of the separation roller 59. will be returned to. This is because the limited power transmission mechanism 58 does not slip depending on the frictional force between the documents. As a result, it is ensured that only the uppermost document is taken out. When the taken out document is being conveyed, the friction saw between the document being conveyed and the separation roller 59 acts as a braking torque sufficient to cause the limited power transmission mechanism 58 to slip, so that the bottom surface of the document is The separation roller 59 will be reversed. Note that while the top layer document is being conveyed, when 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 to the third layer as described above.
It rotates in the Y3 direction shown in the figure and returns in the opposite direction.

Next, please refer to FIGS. 9(a), (b), (C), and (d) for the distance regulating member 204 that regulates the distance between the take-out roller 56 and the separating roller 59. I will explain. FIG. 9(a) is a perspective view of section J shown in FIG. 3 viewed from above, FIG. 9(b) is a partial schematic sectional view of section J shown in FIG. A schematic explanatory diagram for explaining the maximum separation chamber, FIG. 9(d) shows the document detection unit 6.
5 is a schematic perspective view.

The structural members shown in FIG. 9(a) are exposed by opening the cover 6F, which can be opened and closed in the directions of arrows S1 and 82 in the placing section 6, as shown in FIG. ing. The pair of arms 50 and 50 are rotatable about the take-out roller shaft 27 in the arrow 83 direction. Further, the pair of arms 50.50 lock one end of the pressure springs 200, 200 held by inserting a coil portion into the take-out roller shaft 27, and the other end is attached to a bent portion of the roller 6, which will be described later. J to lock on 66a:
The pair of arms 50.50 rotate in the direction of arrow S4 (=l
Forced. Further, the pair of arms 50.degree. 50 has pivot supports 50A and 50Δ provided opposite to each other at their distal ends, and both ends of the pin 50B are pivotally supported in the pivot supports 50A and 50Δ. Furthermore, a protrusion 50C150 is provided on the distal end surface of the pair of arms 50.50 and protrudes from the distal end surface.
C is formed. The lock lever 201, which is inserted through the pin 50B and rotatably supported, rotatably supports a handle portion 201A on one end side, and has an engagement member which is a locked member having a predetermined notch 1] at the lower part of the narrow end side. A window 201B is formed.

Both end surfaces of this lock lever 201 and the shaft 1 [portion 50△
, 50A, which is a biasing member inserted and supported by the pin 50B, has one end thereof latched to the protrusion of the pair of arms 50.50, and
The other end is locked to the north face of the lock lever 201. The biasing force of the springs 202 and 202 biases the lock lever 201 to rotate in the direction of arrow S5 in FIG.

The lock @ 203, which is a locking part, is fixed to a frame (not shown), etc., and is attached to the engagement window 2 of the lock lever 201 which is rotationally biased.
It is designed to lock 01B.

This engagement 1201B, locking shaft 203 and spring 2
02, 202 constitute both separation regulating members 20'l. In addition, the handle portion 201A is made to stand up and this handle portion 201A is made to stand up.
By operating 01Δ, the lock lever 201 is rotationally displaced against the biasing force of the springs 202 and 202, and the engagement between the engagement window 201B and the locking shaft 203 is released. After this operation, by pulling the handle portion 201A upward, the pair of arms 50.50 can be rotated in the direction of arrow S3 in the figure, centering on the take-out roller shaft 27, and the take-out roller 56 and separating roller 59 can be rotated. If a paper jam occurs between the two, the document can be easily removed. Furthermore, when the engagement window 201B is engaged with this engagement shaft 203, the maximum control distance δ of the take-out roller 56 with respect to the separation roller 59 is normally 10 documents, as shown in FIG. 9(C). The dimension that requires intervention is, for example, 1 mm or less.

The rod 66 rotatably supports a detection lever 67 as shown in FIG. 9(a), and the rod 66 and the detection lever 67 are not shown in FIG. 9(d). 65. The document detecting section 65 detects whether or not a document is placed on the placing table 6B (see FIGS. 1 and 2). 65, as shown in FIG. 9(d), the rod 66 and the detection lever 67, the release cam 68 which is fixed to the third shaft 30 and can be engaged with the back surface of the detection lever 67, and the detection lever 67. A detector 69 optically detects the presence or absence of the tip end 67A of the lever 67, and when a stack of originals is inserted from the direction shown in Figure 9 and placed on the mounting table, the originals are detected. As a result of being interposed between the lever 67 and the detector 69, it is determined that there is a document present, and when there is no document, the tip 67Δ of the detection lever 67 blocks the detector 68, so that it can be determined that there is no document.

Further, one end of the rotor 6 passes through the separating device cover 2A shown in FIG. 1 and is connected and integrated with a volume knob 205. In the vicinity of the polycomb knob 205 of the separator cover 2A, as shown in FIG. 9(a), for example, "Paper to Cra 71" is placed in descending order of the coefficient of friction μ25-24-pp between the papers.

"High quality paper 4. Indicator 206 such as "tracing paper"
is set.Then, the polycomb knob 2
An instruction unit 20 that instructs each index 206 according to the rotation of 05.
5Δ is formed protrudingly on the volume knob J) 205. Note that when the indicating portion 205A indicates the position of “craft paper”, the bent portion 66a of the rod 66
The biasing force of the pressure spring 200 that is locked to is the minimum, and the biasing force is gradually increased by rotating the volume knob clockwise.

Here, the two originals are separated by the take-out roller 5G and the separation roller 5.
9, the conditions under which these two originals are separated will be explained with reference to FIGS. 10(a) to 10(d).

The friction coefficient of which document P1 is in contact with the take-out roller 56 and this take-out roller 56 is μfp, and the friction coefficient of which document P2 is in contact with the separating roller 59 and the separating roller 59 is μr.
p, manuscript P1. Let μpp be the friction coefficient between P2 and T be the limit slide of the limited power transmission mechanism 58. Further, the pressing force with which the take-out roller is pressed against the separation roller 59 by the pressure springs 200, 200 is assumed to be W. As shown in FIG. 10(a), one document P
1 is located between the take-out roller 56 and the separation roller 59, the condition for slippage to occur in the limited power transmission mechanism 58 following the rotation of the take-out roller 56 in the feeding direction is μrρ・W>T... (1) μfp-W>T (2) As shown in FIG. 10(b), two originals P1. When P2 is between the take-out roller 56 and the separation roller 59,
Only the original IP1 that contacts the take-out roller 56 is fed,
The document P2 that comes into contact with the separation roller 59 is returned by the action of the limited power transmission mechanism 58 and becomes the document P1. The conditions for complete separation of P2 are μfO・W〉μpp−W・・・・・・(3)μ
r11-W: 1111rl-W-...[4) μp
p-W<T (5) From the above equations (1) and (4), μI]rl<T/W<μrp (6). Next, manuscript P1. Let's talk about the Ii friction coefficient μpp between the P2 phase. The manuscript is a drawing paper,” - trade paper, Kula 71
~There are many types of paper, roll paper, etc., and coated paper (e.g. zinc oxide paper and packaging roll paper) that is treated on both sides or one side, and the coefficient of friction μpp is approximately 0.2 to 0.7. The friction coefficient μrp is within the range of (6) Equation J: As is clear, the friction coefficient μrp
The apparent friction coefficient of the larger and marginal power transmission mechanism (
T/W) must be larger (pull), but this can be satisfied by selecting a material with a large friction coefficient, such as a rubber material, as the material for the separation roller 59. J3 Kerubun 1iiiI+
In order to set the performance, selection of the friction coefficient μpp becomes a problem. Here, for example, if the friction coefficient μ+)11 is selected as a maximum value of 0.7 sheets, the following problem will occur.

In order to satisfy formula (6), (T/\V)
must be equal to or greater than 0.7, and the friction coefficient μrp
must be even larger. In this case, the separating roller 59 and the take-out roller 56 are placed on the platform on which one document with a friction coefficient μl1l) of about 0.2 is set.
It must rotate in the feeding direction following the feed direction. Therefore, as the condition of equation (1) mentioned above, μrp>T/
W must be satisfied (must be pulled, but 1, friction coefficient μ
rp is a value determined by the surface condition of both the separation roller 59 and the document P1, and the friction coefficient μrp is the friction coefficient μpp.
It is a function of Therefore, the friction coefficient μpp is 0.
If it is as small as about 2, the friction coefficient μrp will also be relatively small, and (T/W) may become larger than the friction coefficient μrp. In this case, Fig. 10 (C
), the separating roller 59 continues to rotate in the opposite direction to the feeding direction without following the document P1, causing slippage between the document P1 and the separation roller 59, and as a result, pictures are not printed on the document P1.

If there is information such as characters on it, that information will be scraped off by the separation roller 59. Also,
Even when no information is included, the friction on the surface of the direction 10-ra 59 will increase. Contrary to the setting of the separation performance described above, if the friction coefficient [mu]l]p29--28= is reduced to about 0.2, the following problem will occur. That is, when two originals with a friction coefficient μpp of about 0.7 are set in the separation/feeding device 12, (5
) is not satisfied, and the first
As shown in FIG. 0(d), the separation roller 59 rotates in the feeding direction, and the two documents P+ and P2 are fed without being separated, resulting in a double feeding problem.

As explained above, if the fractionability is 0, the friction coefficient μp of the original is
The permissible range of p cannot be determined (in other words, the types of manuscripts that can be used must be limited).

However, it is impossible to force such a requirement on users. Therefore, in order to obtain separation performance suitable for various originals, it is assumed that the minute 1 liter performance can be adjusted.To do this, as is clear from equation (6), (T/W> is variable). Therefore, (
If the limit shear force T of the limit power transmission mechanism 58 is made variable as a means for varying T/W), or the pressing force W between the take-out roller 56 and the separation roller 59 is made variable, 'an-J love. In the device of this embodiment, the pressing force W is variable.

That is, the rod 66 gets stuck in the rotation of the polycomb knob 205.
By rotating the bent portion 66a, the position at which one end of the pressure spring 200, 200 is locked is changed. A pair of arms 50.50 are connected by this ￥i stomach in Figure 9 (a) S4
The biasing force of the pressure springs 200, 200, which urge the rotation in the direction "A", is made variable, thereby adjusting the pressing force W between the take-out roller 56 and the minute IIIt roller 59. If information such as pictures and letters on the original is scratched off and becomes blurred, turn the volume knob 205 toward the "tracing paper" side of the index 206 and increase the pressing force W. That is, the above-mentioned trouble is prevented by setting (T/W) small. In addition, when documents are fed in duplicate, the volume knob 205 is rotated toward the ``one craft paper'' side of the index 206 to reduce the pressing force W, that is, (T/
W) is increased to prevent the above-mentioned 1-rubble.

The above explanation was based on the conditions for separating two originals, but when three or more originals are separated by the take-out roller 56 and separation roller 5,
59, the following provisions will be further weighted. In this case, only the document that comes into contact with the take-out roller 56 is fed, and the other documents must be separated by the return conveyance of the separation roller 59. Therefore, sufficient braking force must be applied to return and convey documents other than the documents that come into contact with the take-out roller 56. is reduced as the number of other originals interposed between the separating roller 59 and the original is larger based on the coefficient of friction μpp between the originals. The minute-1 reversing saw applied to the document is minimized, and the feeding force from the take-out roller 56 acts on this document via the document to be fed. Even if the separating and reversing force is varied in proportion to the number of documents to be separated, an upper limit must be set on the number of documents to be separated, that is, the number of documents interposed between the take-out roller 56 and the separation roller 59. No. In this example device,
The η1 interval is separated from the take-out roller 56 by the visual control member 20/I to the extent that sufficient braking force can be applied via the separating roller 59 to prevent the document from being sent out without contact with the take-out roller 56. The maximum distance from the roller 59 is regulated. The maximum separation amount differs depending on the paper thickness of the originals and the coefficient of friction μpp between the originals, etc., but in the case of normal originals, it is possible to smoothly feed the originals without excessively requiring the return action by the separating and reversing force of the separation roller 59. 1mm
The following settings are made so that no more than 10 originals are inserted.

Next, the operation of the separating and feeding device 2 will be explained with reference to FIG. 11.

FIG. 11(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 θΔ all at once. At this time, the original P inserted into the accumulation chamber θΔ is the first one.
As shown in FIG. 1(b), the detection lever 67 is pushed away to disable the detector 68, thereby detecting the presence of one sheet. Then, the document P placed in the stacking chamber 6Δ is placed on the loading table 6B by the side regulating plate 6C and the protrusion 33--132= on the lower end of the inclined side of the loading table 6B. Both ends and the tip of the feed roller 11 are held in position by the feed roller 11 in contact with the feed roller 11 . When the document sent out from this separating and feeding device 2 is in a state where it can be conveyed by the conveying device 3 shown in FIG. 1 (hereinafter referred to as "document feeding device"), a The detection means and the judgment control unit determine that the document feeding position is 1, and the IF detector 68 detects the paper cloth, that is, the document feeding position.
When the signal "Original setting complete" is output, the automatic document advance feeding becomes possible. When a start button (not shown) is pressed in this state, the motor 20 is
direction, and the solenoid 31R is energized. When the solenoid 31R is energized, Fig. 5 (a>,
As explained in (b), the clutch 31 is in the connected state, and the rotation of the motor 20 in the ×1 direction is transmitted from the first shaft 25 to the third shaft 30, which is rotated in the ×5 direction shown in the third figure. Ru.

Due to this rotation, the first drive sprocket A-1~52Δ9, the second drive sprocket 52B,
The feed roller 11 rotates in the 6 directions shown in the third figure via the first ladder chain 53A and the fourth one-way clutch 26C, and the cam 44 attached to the third shaft 30 rotates. The stopper 10 rotates in the direction of arrow A1 in FIG. 11(C) and descends via the cam lever 43, cam lever shaft 42, etc. that are in biased contact with each other. Then, as shown in FIG. 11(C), the document P gradually slides downward diagonally from the top layer.

Among the group of fallen documents, the document closest to the loading table 6B (the document located in the lower layer) has its leading edge and the urethane rubber sheet 1
Since the upper layer receives the greater frictional force with 01 and the braking force becomes smaller, the leading edge of the document group that has slipped down is reliably frictionally braked in a step-like manner. Therefore, it is possible to prevent the entire group of original documents that have fallen down from sliding sideways and the uppermost document from coming into contact with the outer circumferential surface of one of the corresponding rollers of the take-out roller 56 and the top roller. 59
It is possible to completely avoid a situation where the uppermost layer of the document cannot be bitten into the contact portion with the document. When the cam 44 is further rotated, the stopper 1° follows the return stroke of the cam curve of the cam 44 and moves toward the arrow A in FIG. 11(d).
The roller 1 rotates in two directions and feeds the top layer of the document P.
Push to 1 and pull 1.

The document pressed against the feed roller 11, that is, the top layer document, is transferred to the take-out roller 56. ! : It is bitten into the contact part with the separation roller 59. This operation is performed during one rotation of the third shaft 30, and as the third shaft 3130 is further rotated once, FIGS. 11(C) and 11(d)
), a similar operation is performed. (Figure 11(e),
(f)). As a result, the document in the uppermost layer inevitably gets caught between the take-out roller 56 and the separation roller 59 in advance of the document J located below.

When this biting operation is completed, the motor 20
is reversed and rotates in the direction of the third arrow Y1 in the figure. Then, the first shaft 25, first one-way clutch 26A, separation feeding shaft 35, take-out roller drive shaft 27, and fourth
the one-way clutch 261] and the take-out roller shaft 55, the take-out roller 56 moves along the arrow Y in FIG.
The separating roller 59 rotates at a speed of 3 VF in the document feeding direction by the action of the separation feeding shaft 35, which rotates at a speed of VF in 5 directions, and simultaneously rotates in the direction of the third arrow Y3 in the figure, and the limited power transmission mechanism 58. Try to make it rotate in the opposite direction at a speed of . At this time, as shown in FIG. 11(h), at the moment when the uppermost document P1 or the document px in the vicinity thereof is not completely bitten by the contact portion between the take-out roller 56 and the separation roller 59, the take-out roller 56 is The frictional rotational force transmitted to the separation roller 59 exceeds the reverse frictional rotational force of the separation roller 59 transmitted through the spring joint 62 shown in FIG. 8(a), and the take-out roller 56 rotates in the forward direction as a driving roller. The separation roller 59 will rotate 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 be removed as shown in FIG. definitely attract people to. Due to the difference in frictional resistance, the separation roller 59 rotates in the direction to take out the original when one sheet is taken out, and in the direction to return the original when two or more sheets are taken out. Then, as shown in FIG. 11 <a), if one sheet is reliably taken out by the cooperative action of the two pairs of rollers, it will be fed by a predetermined amount (this predetermined amount will be described later) by the action of the take-out roller 56. . If it is in the document feeding device, the document PO sent out from the separation feeding device 2 is
The mylar guide 15D and the upper guide 103 cooperate to form an upwardly convex shape, and the tip thereof is guided toward the contact portion between the belt roller 70Δ on which the conveyor bell 1-71 is hung and the registration roller 306. The original Po is placed in the contact area between the belt roller 70A and the registration roller 306.
The tip of the roller 56 and the belt roller 7 are bitten into each other.
The motor 20 temporarily stops after the original is waved between the 0A and the registration roller 306 and the leading edge misalignment is corrected.

Here, the document feeding and separating functions between the take-out roller 56 and the separating roller 59 will be described in further detail with reference to FIG. 11 (1(), 1). Ideally, as the stopper 10 descends, the uppermost document on the placement guide 6B is bitten into the contact portion between the take-out roller 56 and the minute roller 59. However, there is no guarantee that originals of different paper quality will be placed together or that the originals will be separated in an ideal step-like manner (the originals located below the topmost original will be placed between the take-out roller 56 and the separation roller 59). There is a very rare chance that it will bite into the contact area).

As described above, forced separation is performed by the action of the take-out roller 56 and the separation roller 59 which are activated with a time delay. In reality, in any form 2
At the moment a document of more than one sheet is caught in the contact portion of both rollers 56 and 59, the take-out row 556 receives the frictional conveyance force transmitted to the uppermost document PX1 and the conveyance force of the uppermost document PX1, and is frictionally conveyed. PX2 and PX2 (or PX3)
The conveyance force is transmitted to the upper surface of the document PR in contact with the separation roller 59 as a frictional conveyance force. However, on the other hand, the separation roller 59, which is transmitted through the spring join 1-62 shown in FIG. This is possible by setting the frictional conveyance force that the separation roller 59 transmits to the original PR to be larger than the frictional conveyance force.
are returned toward the mounting table 6B by the action of the separation roller 59, while the originals PX1, PX2 (PX3) above are returned to the mounting table 6B.
moves in the take-out direction under the action of the take-out roller 59. Here, the separating roller 59
The reverse circumferential speed VR of is set to approximately three times VF, and assuming that the document PXI in contact with the take-out roller advances 10 mm from the multi-feed state, the document PR in contact with the separation roller 56 will move approximately 10 mm. He was forced back 30 man. However, at the moment when the take-out roller 56 is started,
If the distance 1 (not shown) from the contact part of the separation roller 59 to the leading edge of the original PR is 30 mm or less (X), the return amount of l-X is the original 1 located on one side of the original PR.
It is transmitted to X2 (or PX3) as a return amount and is returned instantaneously. Repeat this to perform the separation action and take out [1
- It will come into contact with the lower surface of the original PXI which is in contact with the roller 5G. The separation roller 59 continues to try to push back the document on PX 1, but there is a spring joint 62 between the separation roller 59 and the separation roller shaft 35 as shown in FIG. 8(a).
The upper surface of the document PX1 receives a friction force of 111'm in the take-out direction from the take-out roller 56, while the separation roller receives a frictional driving force from the bottom surface of the document PX1 via the spring joint 1-62. Although it tries to receive the force of the roller 59, the feeding force W, 111 transmitted by the take-out roller 56 to the upper surface of the document PX1 is much larger than the frictional force transmitted from the spring joint 62 to the minute-10-ra 59. The original 1 pxi is taken out and conveyed as the take-out roller 56 rotates. Here, the lower surface of the original l1PX1 is the separation roller 5.
9 is larger than the frictional rotational force transmitted from the spring joint 62 to the separation roller 59. Therefore, the lower surface of the document PX1 does not slide against the separation roller 59, and in cooperation with the take-out roller 56, only the top document PXI is removed. 41-40- will be reliably taken out and conveyed away from the roller contact area.

Next, the document separation ability of the take-out roller 56 and the separation roller 59 will be explained based on FIG. 11 (1). The take-out roller 56 and the separation roller 5 in a state immediately before starting separation
Belt roller 7 located in front of the contact portion of 9 in the conveying direction
The distance between 0A and the registration roller 306 is l.
a, both rollers 5 from the leading edge of the document that is caught in the contact area between the take-out roller 5G and the separation roller 59 in a multiple feeding state;
6,59The distance to the contact part is IJ2. Poor 3...
・The circumferential speed of the ZR1 take-out roller 56 is VF, and the minute roller 5 is
If the circumferential speed of 9 is VR and we temporarily set 3VF=VR, then 3
(Pa −1>>12 +N3 + . . . Separation action is performed within a range that satisfies ZR.

At this time, in order to ensure a sufficient separation effect for various documents, the volume knob 205 is adjusted based on the difference in the friction coefficient μpp between the documents to increase the pressing force between the take-out roller 56 and the separation roller 59. Be variable. That is, for a paper having a large friction coefficient μpp, the volume knob 205 is rotated toward the "1 craft paper" side of the index 20-A-6.

Then, the rod 66, which can rotate integrally with the volume knob 205, rotates, and the bent part 66a provided at the middle of the rod 66 rotates in the direction of the J: sea urchin half hour mark shown in FIG. 11(m). As a result, the position at which one end of the pressure spring 200 is locked changes. As a result, the urging force of the pressure spring 200 is weakened, and the pressing force W between the take-out roller 56 and the separation roller 59 is reduced. Therefore, by increasing the value of (T/W> in equation (6) above, it is possible to satisfy equation (6) and exhibit the separation effect even for originals with a large friction coefficient μpp. Therefore, double feeding of documents is prevented even when the friction coefficient μpp is large.On the contrary, when the friction coefficient μpp
In the case of a small document, the volume knob 205 is rotated to the [tracing paper] side of the index 206. Then, the bent portion 66a of the sea urchin rod 66 rotates clockwise, and the pressure spring 2
This will increase the biasing force of 00. As a result, the pressing force W between the take-out roller 56 and the separator 10 to 59 increases, and the value of (T/W) in the above equation (6) is reduced to produce an original with a small friction coefficient μpp and friction coefficient μrp. It is also possible to satisfy equation (6). Therefore, even when the friction coefficient μI]I) is small, it is possible to prevent the separation and reversal force of the separation roller 59 from scraping off the upper part of a picture or character on the document. Further, in the present embodiment, the separation amount regulating member 204 regulates the maximum number of originals that can be interposed between the take-out roller 56 and the separation roller 59. The maximum separation amount δ of this separation amount regulating member 204 is:
Since the braking force (separation and reversal force) sufficient to prevent the feeding of documents that are not in contact with the take-out roller 56 is set within a range that can be applied via the separation roller 59, the take-out roller 56 and the separation roller 59 are During this time, documents fed in a stacked state can be reliably separated and double feeding can be prevented.

A1 Category 1\\\Pig%Xvl Team 11λ
As explained based on i), the conveyor belt 71 comes into contact with the belt roller 70A and the registration roller 306 and is waved, and the motor 20 is temporarily stopped. After a predetermined period of time has elapsed, the belt roller 70Δ is
is rotated, and the registration roller 306 is rotated following the rotation of the belt roller 70A, and the original is directed to the exposure position at a predetermined timing such as image processing as shown in FIG. 11(0). It will be transported by

Next, the take-out roller 56 and the separation roller 5 of the separation feeding device
1. What to do if a document jam occurs between 9 and 9.
The explanation will be made with reference to FIG. 1(p). When the cover 6F of the accumulation chamber 6A is opened, the separating and feeding section 12 can be directly viewed in the state shown in FIG. 11(a). The staff member locks the lever.
When the handle portion 201A rotatably attached to the lock lever 201 is raised and the lock lever 201 is rotated against the urging force of the springs 202 and 202, the engagement window 201B of the lock lever 201 is released from the locking shaft 203. M will be removed.

Thereafter, when the handle portion 201A is lifted upward as shown in FIG. 11(p), the arm 50 is moved together with the feed roller 11 and the take-out roller 56 in the direction of arrow S3 in FIG. 145-44-1(a). It is rotated to widen the conveyance path for the document P. Therefore, as shown in FIG. 11(p), the feed roller 11 is cut off from contact with the stopper 10 or the uppermost document, so that the jammed document can be easily pulled out toward the mounting table 6B. At this time, one or more documents P are present on the mounting table 6B, but the contact between both rollers 56 and 59 is broken, and the document cannot be separated and fed. There is.

Next, the conveyance device 3 will be explained.

FIG. 12 is a schematic side view of the transport device 3 and the like.

This conveying device 3 is a conveying means (hereinafter also simply referred to as a first conveying means) that frictionally conveys the original sent from the separation/feeding device 2 on a document platen glass 4, which is an example of a paper sheet placement surface.
300 , and a second conveyance means 302 that discharges the document conveyed by the first conveyance means 300 from the discharge port 301 . Note that the discharge port 301 is the discharge position.

The first conveying means 300 is, for example, a drive roller 70.
An endless -46- conveyor belt 71 is stretched between A and the idle roller 70B, and a pressure roller 109 is provided inside the conveyor belt 71 to bring the conveyor belt 71 into close contact with the surface of the document table glass 4. A large number of conveyor belts 1 to 71 are disposed in the vicinity of the idle roller 70B, and guide rollers 70G of the conveyor belts 1 to 71 are provided. The drive roller 70A is directly connected to a drive motor 72 shown in FIG.
The vehicle can be driven to travel in the direction of arrow Z1 shown in FIG.

The pressing roller 109 has a structure in which its shaft is pressed against the inside of the conveyor belt 71 by means of a leaf spring or the like (not shown), so that the original is sufficiently pushed onto the document table glass 4 and the conveyor belt 71. This allows for secure transportation by keeping them in close contact. At a position facing the drive roller 70Δ, a register [~ roller 306] which is pressed against the conveyor belt 71 is pivotally supported, and is adapted to follow and rotate due to friction with the conveyor belts 1 to 71 that are driven to travel. . This registration roller 306 transports the original sent from the separation/feeding device at the contact portion P1 with the transport bells 1 to 71 (♀1
This is the second step in order to feed the product to the destination at a predetermined timing. Note that this contact portion P1 is the feeding position of the document, and will hereinafter be referred to as feeding position P1.

For example, as shown in FIG. 1/4 (a), the second conveying means 302 is at a position spaced outward from the conveying belt 71 stretched over the idle roller 70B, and is conveyed by the conveying belt 71. A guide member, for example, a curved guide 310, which turns the document in a U-turn and guides it toward the paper discharge tray 308, which is provided above the conveyance bell 1 and which also serves as a cover, is movable, for example, rotated, using its intermediate portion as a fulcrum. Possibly supported. Furthermore, a first nipping and conveying member, for example, an idle paper ejection roller 312A, is rotatably supported at the distal end of the curved guide 310 on the paper ejection tray 308 side, and is located at a lower position where it can come into contact with the idle paper ejection roller 312A. A second nipping and conveying member, for example, a drive paper ejection roller 312B is installed.The idle paper ejection roller 312A and the drive 11 paper roller 312B are
Guided by the curved guide 31o, the leading edge of the document is positioned on both sides - 3
12A, 31-'1l-2B, the curved guide 310 is rotated in the direction of arrow Z2 shown in FIG. 14(a), so that the original is moved as shown in FIG. 4(b). P to paper output tray 3
08 to be held and conveyed.

As shown in FIG. 15(a), the drive system of the drive paper ejection roller 312B includes a timing bell gear 314A that is driven to rotate concentrically with the idle roller 70B, and the drive paper ejection roller 312B is attached to an intermediate portion. A shaft 316 that is attached to the shaft 316 and whose both ends are pivotally supported by a means of connecting chambers, a timing belt gear 314B that can rotate concentrically with the shaft 316, and both timing belt gears 314.
A.

314B and a timing belt 314C stretched over the timing belt 314B. Note that the drive source is a drive motor 72 shown in FIG. 13. As a result, the idle roller 70B is rotationally driven in the direction of arrow Z4 shown in FIG.
) is rotationally driven in the Z5 direction.

49-48- A drive mechanism 355 is provided which rotationally displaces the curved guide 310 to bring the idle paper discharge roller 312A and the drive paper discharge roller 312B into contact only when a document is discharged. An example of this drive mechanism 355 is shown in FIG.
This will be explained with reference to b). The curved guide 310
A support portion 310A located in the middle thereof is rotatably supported by a frame (not shown) via a pin 318.

One end of a frame body (hereinafter simply referred to as a lever with an elongated hole) 320A having an elongated hole is fixed to the left side of the curved guide 310 located at the distal end on the paper discharge tray side. A cam, for example, a disk-shaped eccentric cam 320B is slidably inscribed in the elongated hole of the elongated lever 320A. A yoke cam mechanism 320 is constituted by the eccentric cam 320B and the elongated lever 320A. The driving side is connected to the shaft 316, and the driven side is connected to the eccentric cam 3.
Spring clutch 322 connected to 20B Installation: J. A sleeve 324 having two release protrusions 324- and n-Δ is fitted onto the spring clutch 322 at 180° intervals. One end is pivoted to lock the release protrusion 324A and restrict the rotation of the sleeve 324, and the middle part is pivoted to the plunger of the solenoid 326, and the other end (hereinafter simply referred to as the locking protrusion 328A). A release lever 328 that can be engaged with and detached from the release protrusion 324A is swingably provided. Such a release lever 328 and spring clutch 3
22, the latch 358 is configured to be able to cut off power transmission to the driven side every half rotation of the shirt I~316. In this J: Una rotation mechanism, when the slip nib 324 is rotated once by the driving force from the shirt ~ 316, the eccentric cam 320B on the driven side rotates once, and during that time the elongated lever 320A is moved in the vertical direction. You will have to make one round trip. Therefore, if the release protrusion 324A of the sleeve 324 is locked with the locking protrusion 328A of the swing lever 328 every time the sleeve 324 rotates 180 degrees, the curved guide 310 is alternately moved in the directions of arrows Z2 and Z3 shown in FIG. 15(b). It can be swung to. When the curved guide 310 is rotated in the direction of arrow Z2, the idle paper discharge roller 312A is pressed against the drive paper discharge roller 312B, and the document can be conveyed while being held between the two paper discharge rollers 312Δ, 312B. Such a state in which it is possible to hold and convey the document is achieved only when the document is being printed, and in other cases, the idle state 11 is
The paper roller 312Δ and the drive paper discharge roller 312B are in a non-contact state.

Next, a description will be given of the second member for stopping the document conveyed onto the document table glass 4 by the conveyance belt 71 at a predetermined stop position P2, for example, at the exposure position.

The stop member 351 is shown in FIG. is integrally attached to the curved guide 310. The purpose of this flexible portion 4, j 350 is to muffle sound when a document comes into contact with it. This flexible member 35
0 is an arrow 7s shown in FIG. 14(a) together with a curved guide 310 similar to the idle paper ejection roller 312A described above.
, Z2=51 rotationally displaced in one direction, and as shown in FIG.
The leading edge of the document protruding from the upper surface is positioned and stopped in contact with both paper ejection rollers 312A as shown in FIG. 14(b).
, 312B are in contact with each other, they are positioned below the upper surface of the document platen glass 4 so as not to damage the discharge of the document.

The document can be set at a predetermined stop position P2 (exposure position) when the conveyance device 3 is in an open state, that is, when the conveyance bells 1 to 71 are separated from the document table glass 4 and automatic document feeding is not performed. A structure for this purpose has also been added. First, in FIG. 16(a), the part indicated by 332 is located at the rear end of the document table glass 4 in the conveying direction.
The stop plate has a length approximately equal to the width (in the direction intersecting the document conveyance direction) and has a bent tip portion 332A. At the rear end of this stop plate 332, a drive shaft 33/4 bent in a ]-shape is integrally attached with both ends protruding.
The other end of a tension coil spring 336, one end of which is supported by a hook (not shown), is locked to the bent portion of 334, and this stop plate 332 is rotated in the direction of arrow Z9 shown in FIG. 16(a). It is strong. The stop plate 1-332, which is rotationally biased, has its tip 332A on the surface of the document platen glass 4, as shown in FIG. It is configured to stop at a slightly raised position, and when the document is not automatically fed, the document can be manually moved to the stop position P2 (exposure position). In addition, in order to set the original in the correct position when using the manual printer 1~, please use the stop plate 3.
A sticker 340 with a scale corresponding to the document size is pasted on the upper surface of the document 32.

The support structure of the stop plate 332 is shown in FIG.
), the first protrusion 334A of the drive shaft 334 is loosely fitted into the first stop holder 342Δ, and the second protrusion 334B of the drive shaft 334 is loosely fitted into the second stop holder 342B. , the stop plate 332 is rotatable relative to both stop holders 342A and 342B. In this state, the first stop boulder 324A is movable in the document transport direction.
For example, it is attached to the upper surface of the copying machine body 1A through the long hole 3/I2Δ' with a screw, and the second stop holder 342B is rotatably attached with a screw. Therefore, the stop plate 332 is attached to the second stop holder 34.
Arrow α shown in FIG. 16(b) centering on the attachment part of 2B
1. It is configured so that it can be rotated in the α2 direction and the exposure position can be finely adjusted. Note that both stop holders 342
A.

342B also has the function of positioning the document table glass 4 by pressing the end surface of the document table glass 4 and the upper surface in the vicinity thereof with its leading end. Even if such a stop plate 332 is provided, when the conveyance device 3 is in the open state (the conveyance belt 71 is in contact with the document table glass 4) and the document is automatically fed, the state shown in FIG. (a), (
As shown in b), the stop plate 322 is prevented from rotating at the rear end of the curved member 310, so there is no problem.

Next, the relationship between the time period for conveying the document by the first conveyance means 300 and the time period for conveying the document by the 21i1-th conveyance means 302 will be explained. As is clear from the above description, in the conveyance device 3, the first conveyance means 300 and the second conveyance means 302 are driven by one drive motor 72, and the second conveyance means 300 is driven by one drive motor 72.
While the document is being discharged and conveyed by the first feeding means 302, the flexible portion vJ350 cannot stop the document at the stop position P2. Therefore, the first conveyance means 300 and the second conveyance means 302 are at the stop position fiffiP2 (the twelfth
The time it takes to transport the next original at the feeding position P1 to the stop position P2 is longer than the time it takes to completely eject the original at the ejection port 301 (see figure). configured to be transported. For example, as shown in FIG. 17, the maximum length of the cured original P in the transport direction is
The transport path length from feeding position P1 to stop 55- normal position P2 is lr, and from stop position P2 to i
2. Length of conveyance path to l1 paper opening 301 is insufficient. First conveyance means 3
00, the conveyance speed of the original P is 1, the second conveyance means 30
2, the conveyance speed of the document P by the first conveyance means 300 is V5, and the conveyance force of the document P by the first conveyance means 300 is V5.
When the conveying force is smaller than the conveying force by both conveying means 300.
302 transports the original so as to satisfy the following relationship.

12/Vya+L/V, <poor s/Ve......(1
) Such a relationship is determined by the size difference 1. Set the outer diameter of the drive roller 70A, and the drive paper ejection roller 3.
12△ outer diameter and both timing belt gear 314A
, 314B (see FIG. 15(a)) can be obtained by setting the speeds V, , and V from the gear ratio relationship.

As a result, the curved guide 310 moves in the direction of arrow Z2 shown in FIG.
The document P that was rotationally displaced in the direction and stopped at the stop position P2
When the lock is released and the document P is conveyed at a speed VT by the conveyor belt 71, the leading edge of the document P reaches the nip (contact area) between the drive paper ejection roller 312Δ and the idle screening roller 312B. Then, the document P is nipped and conveyed at vE by both paper discharge rollers 312Δ, 312B. On the other hand, at this time, the next document stopped at the feeding position P1 is also moved at a speed of vT by the conveyor belt 71.
being transported by.

In this case, the first conveying means 300 and the second conveying means 302
Since the above equation is satisfied regarding the transport time of the original, when the trailing edge of the original P passes through the nip between the two paper ejection rollers 312A and 312B and is completely ejected, the leading edge of the next original will be The stop position P2 has not yet been reached. Therefore, after that, the curved guide 310 is rotated in the direction of arrow Z3 shown in FIG. It will be stopped. Therefore, even though one driving source is used, it is possible to improve the exchange efficiency of documents that are conveyed and stopped one after another at the document stop +1 position.

Next, the overall operation of the transport bag M3 will be explained.

The document taken out by the separation and feeding device 2 is transferred to the conveyor belt 71.
and registration roller 306, and is stopped at the feeding position P1 shown in FIG. 17.

When a start button (not shown) installed on the copying machine main body 1A is pressed, the drive motor 72 shown in FIG. 13 is driven in synchronization with the conveyance of copy paper within the copying machine main body 1A. As a result, the original is transported forward on the original platen glass 4 by the frictional force with the transport bells 1 to 71. The leading edge of the conveyed document is connected to the flexible member 35.
0 and is stopped at a stop position P2 (exposure position @) against the conveyance force of the conveyor belt 71. The state of the stopped document P is as shown in FIG. In particular, even when the original P comes into contact with the flexible member 350, the conveyor belt 7
1, a slight conveying force is applied to push the entire leading edge of the document into contact with the flexible member 350. Pressure roller 109A located at
A large pressing force is applied to the other pressure roller J.
, the A biasing member (not shown) is selected. Therefore, the tension is particularly increased in the portion of the conveyor bell 1-71 near the flexible member 350, making it possible to prevent the original from waving, and to ensure that image information without any distortion is transmitted to the original during exposure in the copying machine main body 1A. It becomes possible to obtain from In addition, the pressure roller 109A and the forward force member (not shown) are separately arranged so as to have four pressure parts for the conveyor belt 71 at predetermined intervals along the direction intersecting the document feeding direction. By configuring the suppressing means 109, it is possible to obtain a frictional conveyance horn that can secure an appropriate conveyance speed for the document, and also to apply a strong conveyance force to the document to the extent that the document is likely to be bent. This makes it possible to achieve high reliability at low cost. In addition, the pressure roller 109A and the biasing member shown in the figure are specially arranged to have four rows of pressure parts for the conveyor belt 71 at predetermined intervals along the document feeding direction. By configuring the above-mentioned suppressing means, it is possible to prevent the document from moving straight forward with a simple structure.On the other hand, when the document is stopped, it comes into contact with the flexible member 350, so that Sound reduction has been achieved during contact.

Then, the original P stopped at the stop position P2 is exposed to light J: by the copying machine main body 1Δ, and subjected to the copying process. Note that during the copying process, the separation and feeding device 2 is operated to transport the next document to the feeding position P1, and is in a standby state.

When the copying operation for the document P in the copying machine main body 1A is completed, the solenoid 326 shown in FIG. Release protrusion 324A
It will be changed from 1 to 1.

Further, the drive motor 72 is driven simultaneously with the excitation of the solenoid 326. Then, the idle roller 70B, the timing bell 1 to the gear 314A, and the timing bell l-31 shown in FIG.
4, C, the shaft 316 is rotationally driven via the timing belt gear 31/lB.

The rotation of this shaft 316 is shown in FIG. 15(b) = 60
- Input to the driving side of the spring clutch 322. At this time, the release protrusion 324A on the sleeve 324 is free, so the rotational force input to the driving side is transmitted to the eccentric cam 320B placed on the driven side. When the eccentric cam 320B starts rotating, the yoke cam mechanism 3
An elongated hole 320A forming a part of the cam 20 is pushed down by the eccentric cam 320B. As a result, the curved guide 10
is rotated in the direction of arrow 72 from the state shown in FIG. 14(a), and when the sleeve 324 has made a half turn,
The position is shown in b).

At this time, before the sleeve 324 is rotated half a turn, the 15th
Since the solenoid 326 shown in Figure (b) is demagnetized, when the sleeve 324 rotates half a turn, the release protrusion 324A is again engaged with the locking protrusion 328A, and the rotational force transmitted to the eccentric cam 320B is cut off, so that the curved guide 310 is the 14th
The state shown in Figure (b) will be maintained. Therefore, as shown in FIG. 14(b), the flexible member 350 is retracted downward from the upper surface of the document platen glass 4 so that the document can be conveyed by the conveyor belt 71, and the idle paper ejection roller 312A is It comes into contact with the drive paper ejection roller 312B and is in a state where the document can be held and conveyed.

On the other hand, when the drive motor 72 is rotated, the conveyor belt 1-
By the traveling drive of 71, the original P at the stop position IP shown in FIG. 17 and the next original at the feeding position P1 are transported forward at a speed vT. Note that the flexible member 350 is shown in FIG.
The state shown in FIG. 14(b) is changed from the state shown in a) immediately after the drive motor 72 starts rotating, and also at the feeding position P.
There is some slippage before the original at position 1 actually starts to be conveyed, so the original at stop position P2 and the original at feeding position @P1
It is safe to assume that conveyance will start almost simultaneously with the next document in . Furthermore, when the document at the stop position P2 is transported, since the stop member 351 and the curved guide 310 are integrated as described above, the document can be smoothly guided to the curved guide 310 and stopped. It is possible to prevent the document from jamming when transferring the document from position P2 to the curved guide 310.

Then, the leading edge of the document P reaches both discharging rollers 312△.

When the document P reaches the abutting portion of the paper discharge roller 312B, the document P is nipped and conveyed at a speed VE by both paper discharge rollers 312A and 312B. When the time required to eject the maximum length of the document along the transport direction has elapsed, the document P is completely ejected onto the paper ejection tray 308.

At this time, the first conveying means 300 and the second conveying means 302 are conveying the original while satisfying the above-mentioned formula (1), so at the time when the original P is completely ejected, the next original is The stop position P2 has not yet been reached.

Thereafter, the solenoid 326 shown in FIG. 15(b) is energized, and the locking protrusion 328A of the swing lever 328 is
It is released from the release protrusion 324Δ on 24. Then, as described above, the spring clutch 322 shown in FIG. 15(b)
transmits the rotational force of the shaft 316 to the eccentric cam 320B, and pushes up the lever 320A with a long hole, which constitutes a part of the yoke cam machine IN 320. As a result, curved guide 3
1063- is rotationally displaced in the direction of arrow Z3 from the state shown in FIG.
It is in the state shown in Figure 4 (a). This sharpening sleeve 3
Since the solenoid 326 shown in FIG. 15 (1) is demagnetized before the sleeve 324 is rotated half a turn, the release protrusion 324Δ is again engaged with the locking protrusion 328A when the sleeve 324 is half rotated.
The rotational force transmitted to the eccentric cam 320B is cut off, and the curved guide 310 maintains the state shown in FIG. 14(a). Therefore, the next document sent comes into contact with the flexible member 350 and is stopped at the stop position P2, and a non-contact state is achieved between the idle paper discharge roller 312A and the drive paper discharge roller 312B. In this way, the idle paper ejection roller 312Δ and the drive paper ejection roller 312B are in contact with each other only when the document is ejected, so that the document can be nipped and conveyed, and in other cases, as shown in FIG.
As shown in a), both sides 312A and 312B are in a non-contact state. Therefore, the idle paper ejection roller 3"12
-6/I by A and drive paper ejection roller 312B
- If the original gets jammed on the curved guide 310 or the transport bell l-71 while it is being held and transported, the 14th
As shown in Figure (a), when the idle paper ejection roller 312A and the drive paper ejection roller 312B are separated, the document can be easily pulled out.

-1 The operation of ejecting the original at the stop position N P 2 and feeding the next original at the feeding position P1 to the stop position P2 is performed one after another in a series of steps.

In this case, the first conveyance means 300. driven by one drive motor 72. Since the second conveying means 302 conveys the documents while satisfying the relationship (1), it is possible to improve the exchange efficiency of the documents that are successively conveyed and stopped at the stop position P2.

The separating and feeding device 2 is configured to be applicable to separating and feeding copy sheets as shown in FIG. 12. In addition, the separation and feeding device 2 is connected to the take-out roller 56 via a parallel link mechanism, for example, and the nip portion (contact portion) of the roller 59 is connected to the third copy paper provided in the copying machine main body 1△. The transport path 360 is configured to be able to be loaded evenly.

The copying machine main body 1A includes a first copy paper transport path 366 that guides copies from a first paper feed cassette 362 to a pair of registration rollers 364, and a first copy paper transport path 366 that guides copies from a second paper feed cassette 368 to a pair of registration rollers 364. leading second copy paper transport path 370
and a transport roller pair 372 that transports the copy paper sent into the third copy paper transport path 360 to the registration roller pair 364.
In addition, other copying process equipment (not shown) such as a photosensitive drum 374 provided ahead of the pair of registration rollers 364 are provided. Note that from the nip portion N1 between the take-out roller 56 and the separation roller 59, the registration roller pair 372
The distance 11tL to the nip portion N2 is set to a dimension that allows delivery of the smallest size copy paper fed from the separation and feeding device 2. With such a configuration, the separation and feeding device 2 can be used as a third paper feeding cassette, contributing to improved functionality of the device.

In addition, various spring clutch devices are used in the embodiment described above, and although detailed explanations have been given regarding them, a supplementary explanation will be given here. For example, to explain a gear in which a spur gear is attached to the driven side, the conventional gear is shown in FIG. 18(a).

The reference numeral 401 in the drawings, which was constructed as shown in FIGS. 4(b) and 3(c), is a rotationally driven driving shaft, and a driving boss member 402 having a cylindrical engagement surface 402A rotates integrally with this It is inserted and fixed via a tapered bottle (not shown) or the like.

A clutch spring 403 on a coil having an upright portion 4.03B extending horizontally at one end is inserted into the cylindrical engagement surface 402A. and the standing portion 4.
A sleeve 404 having a locking groove 404A for locking the clutch spring 404A and a release protrusion 404B protruding from the outer periphery is loosely fitted onto the outer peripheral surface of the clutch spring 403.

Furthermore, a cylindrical engagement surface 405Δ that fits into the inner diameter part of the clutch spring 403, a cylindrical engagement surface 405A that fits into the inner diameter part of the clutch spring 403, and a locking part in which the extension part 403A of the clutch spring 403 is locked. Stop part 40
5 B and an active member such as a spur gear 405C are integrally molded into a driven boss member 405, which is inserted into the drive shaft 402 so as to be freely rotatable, and the cylindrical engagement surface 405A is fitted into the inner diameter portion of the clutch spring 403. The extension part 40 of the clutch spring 403 is attached to the locking part 405B.
3A is inserted and locked.

In such a spring clutch device, the driving shaft 4
01 rotation is the cylindrical engagement surface 402A of the driving boss member 402.
The friction force between the inner diameter part of the clutch spring 403 and the friction horn between the inner diameter part of the clutch spring 403, the extension part 403A of the clutch spring 403, and the driven boss member 40.
5 is connected to the locking portion 405B, the transmission is transmitted to the driven boss member 405, and the spur gear 405C is rotated. When the transmitted power is cut off, the swingable locking lever 406 locks the release button 404B on the sleeve 404,
Rotation of this sleeve 404 is restricted.

Then, the rotation of the clutch spring 403 is restricted, and the cylindrical engagement surface 402Δ of the driving boss member 402 slides on the inner diameter of the clutch spring 4.03, thereby transmitting rotational force to the driven boss member/I05, that is, the spur gear 405C. It will no longer be done.

By the way, in such a device, the driving boss member 40
There is a problem in that the device in which the cylindrical engagement surfaces 402A and 405A, which are boss portions, are formed on both the driven boss member 405 and the driven boss member 405 becomes large in size.

Figure 19(a) shows a solution to this problem.
, (b). Figure 18 (
The same members as those shown in a), (b), and (C) are given the same reference numerals, and detailed explanation thereof will be omitted. The different configurations are
The axial length of the clutch spring 403 is reduced to the driving boss member 40 without using the driven boss member 405 and the sleeve 404.
The axial length L of the cylindrical engagement surface 402A formed in 2
1, and the clutch spring 4.
Locking hole 408A into which the extension portion 403Δ of 03 is inserted and locked.
A spur gear 408 is provided, and this spur gear 40
8 to be freely rotatable relative to the driving shaft 401, and insert the extension portion 40 of the clutch spring 403 into the locking hole 408A.
This is the point where 3A was inserted and a silk stand was constructed. In such a configuration, the locking lever 40 shown in FIG. 18(b)
6 is engaged with the upright portion 403B of the clutch spring 403, power transmission from the driving shaft to the spur gear 408 is interrupted and interrupted. When comparing FIG. 18(C) and FIG. 19(b), the one shown in FIG. 19(b) is the cylindrical engagement surface 405 formed on the driven boss member 405.
The axial length of .DELTA. shown in FIG. 18(C) is also shorter by 20 minutes, thereby achieving miniaturization.

It should be noted that the above embodiment is merely an example, and it goes without saying that various modifications can be made within the scope of the gist of the present invention.

For example, the stopping member is not limited to having a flexible member on the surface as in the above-mentioned embodiments, but may be of any type as long as it contacts and stops the paper sheet against the conveying force from the conveying means. In addition, the specific configuration of the guide member is similar to the above embodiment, in which an idle paper ejection roller is attached to one end (not limited to the configuration in which the paper sheet is pulled), in short, the guide member is configured to guide paper sheets upward to the conveyance means, and It is only necessary that the integrally provided stop member is rotatably displaceable in order to move it out and out from above the paper sheet loading surface.

[Effects of the Invention] As explained above, in the paper sheet sequential feeding device of the present invention, the paper sheets that have been stopped by the stop member can be smoothly guided to the guide member, and the paper sheets to be ejected can be smoothly guided. It has excellent effects such as being able to prevent clogging.

[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 the separation and feeding device, and Fig. 3 is a drive of the separation and feeding device. 4(a) and (b) show a part of the drive system. 1. An exploded perspective view 2. An assembled perspective view. 5. (a), (b), and (c) show a part of the drive system. 11 is an exploded perspective view, an exploded perspective view of the clutch interrupting portion, FIG. 6 is a detailed perspective view of the J section shown in FIG. 3, FIG. 7 is a schematic perspective view of the vicinity of the cam lever, and FIG. 8(a). 9(b) is an exploded perspective view and an assembled perspective view of the limited power transmission mechanism, FIG. 9(a) is a perspective view of section J shown in FIG. FIG. 9(C) is a schematic explanatory diagram for explaining the maximum size of 111 stones, FIG. 9(d') is a schematic perspective view of the document detection unit, and FIG. a>, (b). (c) and (d) are schematic explanatory diagrams for explaining the separation operation of paper sheets, and Fig. 11 (a) to Fig. 11 (p) are the operation of the separation and feeding device. Explanatory drawings, FIG. 12 is a schematic side view of the sheet sequential feeding device and the main body of the copying machine, FIG. 13 is a schematic perspective view showing the drive system of the first conveying means, and FIG. 14 (a>, (b) respectively) A side view showing details of the second conveyance means, FIG. 15 (a>, (
b) is a schematic perspective view showing the drive system of the second conveying means, a schematic perspective view showing the drive mechanism of the curved guide, and FIG. 16(a). (1)) is a detailed perspective view of the stop plate, a perspective view showing the attached state of the stop plate, FIG. 17 is a detailed explanatory view of the conveyance device, and FIGS. 18(a) and (b). (C) is an exploded perspective view 9 assembled perspective view 9 assembled sectional view for explaining correction of the spring clutch device, FIG. 19 (a),
(b) is an exploded perspective view 1 assembly section 73- = 72- view for supplementary explanation of another spring clutch device. 4...Paper sheet placement surface, 300...Transportation means, 310
...Guiding member, 350...Flexible member, 351...
Stopping member, P...Paper sheets. (0) 31 Funeral Illustration 5 (C) 1N 00 59 Funeral Illustration 9 (C) 01B (d) (m) (n) 9 Funeral Illustration 11 (0) Funeral Illustration 15 (0) Funeral Illustration 15 (b) 16

Claims (2)

[Claims] (1) A conveyance means that contacts and conveys the paper sheets on the paper sheet placement surface, and a conveyance means that resists the conveyance force from the conveyance means to convey the paper sheets that are conveyed on the paper sheet placement surface. A paper sheet feeding device comprising: a stop member that contacts and stops the paper sheet; and a guide member that guides the paper sheet conveyed by the conveyance means again in a direction opposite to the conveyance direction of the conveyance means after stopping for a predetermined time. ,
A paper sheet feeding device characterized in that the guide member is integrally provided with the stop member, and the guide member is configured to be movable so as to make the stop member appear and retract from a paper sheet placement surface. . (2) The sheet feeding device according to claim 1, wherein the locking member has a flexible member on the sheet contacting surface.