JPS63282036A - Original conveying device - Google Patents

Abstract

PURPOSE:To enhance the efficiency of manual insertion of originals by providing a manually inserting section in an original conveying device which circulates the originals that have been fed one by one from the paper feed port of an original stacker, for repeatedly processing the originals, and by providing a movable paper feed tray in the manually inserting section. CONSTITUTION:Originals 4 are fed one by one into an original stacker 3, and then are fed into a processing section 8 by way of a conveying path 35 so that the originals are subjected to exposure before they are returned into the stacker 3 being guided by a gate B. The rear end of a paper feed tray 8 for manually inserting originals is lifted up so as to be moved to a position indicated by a dotted line, and when it approaches a semicircular roller 28 in a paper feed port, the feed-out of the originals is inhibited so that the originals on the paper feed tray 84 are one by one fed out onto the paper conveying path 35. The originals are discharged onto a discharge tray 83 after they are subjected to exposure. When the paper feed tray 84 is returned to its original position, the originals in the original stacker 3 are fed out. Thereby it is possible to enhance the manual insertion of the originals.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention separates the originals one by one from the paper feed port of the original stacker, feeds them to the processing section, returns the processed originals to the original stuffer car, and repeats the process. The present invention relates to a document feeding device that has an RDF mode that can feed paper, and an SDF mode that manually feeds a document from the paper feed port toward a processing section and discharges the processed document to a discharge tray outside the machine. .

[Background of the invention]

Generally, this type of document conveying device is equipped with a document separation mechanism at its paper feed port, so documents that are easily damaged cannot withstand being passed through the separation mechanism.

Originals that are difficult to separate with the separation mechanism (for example, pasted originals, folded originals, etc.) cannot be fed.

Therefore, in order to be able to feed such originals, conventionally, a manual paper feed port was provided separately from the paper feed port of the document stacker, and the paper was fed to the processing unit without passing through the separation mechanism. However, this resulted in two paper feed ports, which was extremely troublesome to operate.

Therefore, the applicant released the document separation mechanism installed in the document stacker's paper feed port during manual paper feeding to enable manual paper feeding from the same paper feed port, but the document stacker is still used for manual paper feeding. On the other hand, when a document is set on the document stacker, this becomes a nuisance. On the other hand, having a fixed manual feed tray above the document stacker makes it difficult to place the document on the document stacker in RDF mode. The problem was that it was difficult to do.

[Purpose of the invention]

This invention is intended to solve the above problem.

Easily feed paper manually into the paper feed slot of the document stacker.
It is an object of the present invention to provide a document conveying device that does not cause any trouble when setting documents on a document stacker in RDF mode.

[Structure of the invention]

In order to achieve the above object, the present invention provides an RDF mode in which the originals are separated one by one from the paper feed port of the original stacker and fed to the processing section, and the processed originals are returned to the original stacker and repeatedly fed. In a document feeding device equipped with an SDF mode in which a document is manually fed from the paper feed port toward a processing section and the processed document is ejected to a discharge tray outside the machine, a manual feed movable to the paper feed port is provided. A paper plate is provided, and the plate is movable to a position out of the way in the RDF mode, and is movable toward the paper feed port of the document stacker in the SDF mode.

〔Example〕

Next, the present invention will be explained based on examples with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 designates a copying machine main body that can select between a copy mode in which the exposure optical system is moved and a copy mode in which the exposure optical system is fixed, and 2 a document conveyance device. The document conveying device 2 includes a document stuff car 3 whose front part is curved. On the document stuff car 3, there is a trailing edge regulating plate 5 against which the trailing edge of the document 4 is abutted when centrifuging the document 4. Width regulating plates 6, 6' are provided for regulating the width. The width regulating plates 6.6' are connected to racks 6b and 6b' which can alternately slide laterally across the pinion gear 6a on the lower surface of the document stacker 3, and are movable symmetrically about the center. The horizontal size of the document can be read by detecting its movable position with a sensor (9) not shown. Further, the trailing edge regulating plate 5 has a function of pushing out the leading edge of the document 4 set on the document stacker 3 to the detection position (regular position) of the stack sensor 27.

7 is in the raised position when the document 4 moves forward due to the pushing action of the rear end regulating plate 5, and when the leading edge of the document reaches the detection position of the stack sensor 27.

This gate member is lowered by a signal from the stack sensor 27 and placed on the original 4 by its own weight. This gate member 7 has the function of holding down the original document 4 to be fed by its own weight or a spring, and as described later, it pushes the leading edge of the original document that has passed through the processing section 8 and returned onto the document stacker 3, and In addition to aligning the leading edge for paper feeding, it also has a function to reliably distinguish between re-stacked documents and documents currently being fed.

However, in order to effectively demonstrate these functions.

In this embodiment, ribs 3a are protruded from the upper surface of the document stacker 3 at appropriate intervals along the paper feeding direction as shown in the second figure, and a plurality of ribs 3a are provided on the lower edge of the gate member 7 between the ribs 3a. A protruding piece 7a is provided to form a so-called comb-teeth shape. That is, by deforming the original on the original stacker 3 into a waveform as shown in the third diagram by the ribs 3a and the comb-like protrusions 7a, the original 4 being fed is given stiffness,
This effectively prevents the leading edge of the returned document from slipping under the gate.

The gate member 7 is formed into a U-shape in plan, and both side surfaces 7b and 7c are brackets 10 and 10 fixed to the front frame 9 of the main body 2 with screws or the like, as shown in the second figure.
The distal ends of the left and right gate levers 12.12' whose proximal ends are loosely attached to the shaft 11 rotatably mounted on the main side of the The end of the auxiliary lever 13 is pivoted, and the tip of the lever 13' is pivoted. The gate lever 12, 12' has projecting parts 12a, 12a' at the upper part of its inner edge side, and a push-up pin 1 correspondingly implanted in the shaft 11 on the lower surface thereof.
4.14' is set to hit. This shaft l
l meshes with a small gear 16' coaxial with the gate cam gear 16 via a sector gear 15 fixed to its end, and the gate cam gear 16 is connected to the output gear 17 of a drive source 17 that can be reciprocated.
’ is connected. Therefore, when the shaft 11 rotates clockwise under the drive from the drive source 17, the push-up pin 14.14' pushes the gate lever 12.12' upwardly through its overhang 128.122'. The gate member 7 is rotated and raised as shown in FIG. 4A. Further, when the shaft 11 is driven by the drive source 17 and rotates counterclockwise in the raised position of the gate member 7, the gate lever 12.12' mounted on the push-up pin 14.14' is moved. Rotate it downward to lower the gate member 7 as shown in FIG. At this time, the push-up pin 14
．． Reference numeral 14' is designed to allow the gate member 7 to escape at an angle greater than the angle at which it hits the original on the original stacker 3. Therefore,
The gate member 7 is configured to press down the original on the original stacker with its own weight. This gate member 7 causes the auxiliary lever 13, 13' to follow its vertical movement.

The front surface of the gate remains substantially perpendicular to the upper surface of the document stacker 3. That is, the gate member 7 is configured so that the front surface of the gate can be placed at a substantially right angle to the originals, regardless of the number of originals.

The gate cam gear 16 is provided with a tongue piece 19 that blocks the detection sensor 18 at its initial position. The sensor 18 determines the home position of the gate cam gear 16 when it is blocked by the tongue piece 19, and the drive source 17
can be rotated forward or reverse by the required angle. In this case, it is preferable to use a stepping motor that can be controlled by pulses as the drive source 17.

Reference numeral 20 denotes a push-out belt that pushes out the document at a fixed position to the paper feed position as described above; 21 a paper feed belt that sends out the document at the paper feed position from the bottom layer; and 22, which is in contact with the paper feed belt 21 and pushes out the document due to the weight of the document. This is a stop roller that prevents the machine from moving. The paper feed belt 21 is stretched between a drive shaft 23 connected to the main motor 100 via an electromagnetic clutch 21a installed on the shaft and a one-way control means (not shown), and a driven wheel 23'. The upper belt surface is the rib 3a of the document stacker 3
It stands out a little more.

The stop roller 22 is attached to a fixed shaft via a spring clutch 24. This spring clutch 24 is the fifth
As shown in FIG.
Spring boss 24d.

24d' to allow the stop roller 22 to freely rotate (
When the clutch lever 25 is inactive on the protrusion 24b of the outer cylindrical body 24a, the rotation of the stop roller 22 can be restricted. This clutch lever 25 is pivotally supported in a hanging manner at the tip of an arm 26 fixed to the shaft 11 in a direction opposite to the push-up pin 14 of the gate lever. Therefore, the gate member 7
As shown in FIG. 4A, the clutch lever 25 is lowered and pushes the protrusion 24b of the spring clutch 24 in the clockwise direction.
When the gate member 7 is placed on the document 4 by rotating the shaft 11 in the opposite direction as shown in FIG. The spring returns to its original position and restricts the rotation of the stop roller 22.

The extrusion belt 20 is formed of a perforated belt stretched between so-called half-moon rollers 28 and 29 whose outer periphery is partially cut out. As shown in FIG. 7, this one half-moon roller 28 receives driving force from a main motor 100 through a one-turn spring clutch 30 in the same way as the paper feed belt 21.

In the rotary spring clutch 30, the protrusion 30b provided on the outer cylindrical body 30a hits the tip of the clutch lever 31, which is rotatable in a seesaw shape around a shaft fulcrum 31' as shown in FIG. When the rotation of the body 30a is restricted, the clutch spring 30C built therein is moved to the spring posts 30d, 30.
d' (see Figure 7) and the main motor 100
While the driving force is disconnected from the clutch lever 31, when the tip of the clutch lever 31 comes off the protrusion 30b of the outer cylinder 30a of the spring clutch 30 as shown in FIG. The drive from the main motor 100 is transmitted to the half-moon roller 28.

The rear end side of the Tarafuchi lever 31 is pressed against the cylindrical portion 16a of the gate cam gear 16 by the spring force of a tension spring 31a. A cam-shaped portion 16b is provided on a part of the circumference of this cylindrical portion 16a. Therefore, when the gate cam gear 16 is rotated by the operation of the drive source 17 of the gate member 7 and the cam-shaped portion 16b pushes down the rear end side of the clutch lever 31, the tip thereof is rotated by the outer cylindrical body 30a of the spring clutch 30.
It is designed so that it can be removed from the protrusion 30b. This rocking of the clutch lever 31 is caused by the gate cam gear 1 which is unrelated to the vertical drive of the gate member 7 when the gate member 7 is lowered.
It can be twisted by 1 in the rotation area of 6. That is, the gate cam gear 16
As mentioned above, has a home position (indicated by the symbol P in FIG. 8) determined by the initial position detection sensor 18 and the tongue piece 19, and the rotation area S in the counterclockwise direction from the point P is the upper and lower part of the gate member 7. The rotation area St in the clockwise direction is used for swinging the clutch lever 31.

Incidentally, in the rotation region S8 of the gate cam gear 16 used for this swing, the push-up pin 14 escapes from the gate lever 12, and the sector gear 15 has teeth skipped by the pinion gear 16' at its tooth end. There is.

As mentioned above, the tip of the clutch lever 31 is connected to the outer cylindrical body 30a.
When the semicircular roller 28 comes off the protrusion 30b and the main motor starts rotating the half-moon roller 28, the gate cam gear 16 rotates counterclockwise due to the reverse rotation of the gate drive source 17, and the rear end side of the clutch lever 31 moves toward the cam-shaped portion. 16b, and is returned by the spring 31a to a position close to the outer cylindrical body 30a of the spring clutch 30 whose tip has passed by the protrusion 30b, and is rotated once by the half-moon roller 28. The protrusion 30b again hits the tip of the clutch lever 31, cutting off the driving force from the main motor 100.

The half-moon roller 28 always makes one complete rotation and then stops.

Further, as shown in FIG. 2, the extrusion belt 20 is provided in through holes 32 arranged side by side at a plurality of locations (three locations in the figure) on the document stacker 3. The periphery of this through hole 32 is a rib 3a on the document stuffer 3.
It was as exciting as it was.

Further, the front side in the paper feeding direction is an inclined surface 32a to prevent the leading edge of the document from getting caught. When the notches of the half-moon rollers 28 and 29 are upward as shown in FIG. It stands out when it's on top. In other words, the original 4 at a fixed position on the original stacker 3 is pushed out by the friction of the pushing belt 20 protruding from the through hole 32 with one rotation of the half-moon roller 28,29. In this case, since the paper feed belt 21 is stationary due to the power from the main motor 100 being cut off by the action of the electromagnetic clutch 21a, the leading edge of the pushed out document is located at the nip between the paper feed belt 21 and the stop roller 22 ( It will cut into the opening point) in a dendritic manner.

Reference numeral 33 denotes a suction box provided to surround the extrusion belt 20 from the bottom side of the document stacker 3, and the suction box 33 pushes one of the lowest layers of documents into the through hole 32 by the suction action of its suction fan 34. It is configured so that the extrusion belt 20 can effectively exert its extrusion force by adsorbing it in the gap between the extrusion belt 20 and the belt hole.

Reference numeral 35 indicates a forward path for guiding the original fed from the paper feeding mechanism 20 onto the platen glass 36 of the copying machine 1, which serves as the processing section 8; The 6 reversing path 37, which is a reversing path for reversing after exposure, is used to correct the reversal so that the even-numbered page side of a double-sided document faces the platen glass 36 surface, or to return the thus corrected and exposed document to the document stacker 3. This is to enable the pages to be reversed and corrected again, and is designed to draw an upward loop from the same surface as the platen glass 36 and merge with the upper side of the forward path 35.

38 is a conveyance roller provided in the middle of the forward path 35;
9.40 is a conveyance roller provided in the middle of the reversing path 37. These conveyance rollers 38 and 39.40 are connected to the main motor 100 via a one-way control mechanism so that they can always rotate in the same feeding direction.

Reference numeral 41 denotes a conveyor belt for conveying the original in the forward and reverse directions on the upper surface of the platen glass 36. This conveyor belt 41 includes a first roller 42 on the sheet feeding side connected to the main motor 100 via a forward/reverse switching means 101;
It is stretched between it and the second roller 43 on the paper ejection side. A tension roller 44 is in pressure contact with the upper belt surface near the first roller 42, and the lower belt surface is brought into sliding contact with the platen glass 36 by a plurality of presser rollers 45.

The first roller 42 and the second roller 43 are connected to each other by a timing belt 46 as shown in FIG. In this case, the timing pulley 47 on the first roller 42 side is fixed to the first roller shaft 42a, and the timing pulley 48 on the second roller 43 side is attached to the second roller shaft 43a via a one-way clutch 49. Also, the first roller 4
The circumferential speed of the second roller 43 is configured to be slightly faster than the circumferential speed of the second roller 43 driven via the one-way clutch 49. Therefore, when the conveyor belt 41 rotates in the forward direction (arrow in FIG. 10), it runs by the driving force from the first roller 42, so that the lower belt surface is on the slack side. In this case, the second roller 43 is designed to slip between it and the one-way clutch 49, but if the conveyor belt 41 slips for some reason, for example, between it and the first roller 42, the driving force is not sufficiently transmitted. Due to the action of a one-way clutch 49, which is locked when the running speed of the belt decreases due to the rotation of the conveyor belt 41, the second roller 43 becomes the driving side and can drive the conveyor belt 41. Further, when rotating the conveyor belt 41 in the opposite direction (counterclockwise), the one-way clutch 49 is locked, and the second roller 4
3 is the drive side of the conveyor belt 41. That is, the vi conveying belt 41 sometimes runs with the first roller 42 on the driving side, and sometimes runs with the second roller 43 on the driving side. This is particularly effective when performing synchronized exposure while feeding the original on the platen glass.

Reference numeral 50 denotes a document stopper provided at the paper discharge side end of the platen glass 36, and as shown in FIG. The solenoid 53 connected to the other end of the operating lever 51 and a spring 51' opposing the solenoid 51 allow the operating lever 51 to move in and out of the platen glass 36. This document stopper 50 is RD
While conveying the document over the platen glass 36 with the conveyance belt 41 at a synchronous exposure speed as in the F mode.

When creating an image on a drum by exposure in a fixed state, the optical system 54, which is provided directly below the platen glass 36 and has a selectable mode of fixed position and movement, is lowered from the platen glass, and when in ADF or SDF mode. The original is stopped at the exposure position on the platen glass 36 as shown in FIG.
When an image is created on the drum by exposure while moving the drum, it operates so as to protrude above the platen glass.

Reference numeral 55 indicates a paper discharge guide plate continuous to the exit side of the platen glass 36, and 56 indicates a paper discharge belt. The paper discharge belt 56 is supported by a shaft immediately behind the document stacker 3, and is connected to a drive roller 57 connected to the main motor 100 via a one-way control mechanism, and a drive roller 57 that is supported by a shaft so as to be able to move horizontally along the upper and lower surfaces of the document stacker 3. supported tension rollers 58, 59;
Auxiliary rollers 60 and 61 that are pivotally supported near the paper ejection guide plate 55 are stretched so as to wrap around the rear side of the document stacker 3 in a C-shape, and rotation of the drive roller 57 in a fixed direction causes the conveyor belt to The original document fed out from the paper 41 can be conveyed in the paper ejection direction.

As shown in FIG.
Two parallel horizontal grooves 63 provided on both sides of the frame 62.62
．． The upper moving bodies 65 and 65 and the lower moving bodies 66 and 66, which are slidably held on the upper moving bodies 64 and 64 via roller members, are respectively supported by shafts, and the respective moving bodies 65
．． Reference numeral 66 denotes two sprockets (wire pulleys may also be used) 67° 67' that are pivotally supported on the front and rear sides of the skeleton 62 on both sides.
, 68 and 68' chain (wire) 69
It is connected to the upper and lower sides of the housing via attachments 70 and 71. And one sprocket 67 is the 13th
As shown in the figure, it is connected to a drive source 72 which is capable of forward and reverse rotation via an intermediate gear 72'. Therefore, the drive source 72
9 in the forward and reverse directions, the upper belt portion 56a of the document stacker 3 moves forward or backward together with the tension roller 58 pivoted on the upper moving body 65, and the lower belt portion 5
6b is a tension roller 5 that is mounted on the lower moving body 66;
9, the belt tension run can be kept constant at all times.

The movement mechanism of the paper ejection belt 56 is configured as a movement control mechanism of the trailing edge regulating plate 5 against which the trailing edge of the document is abutted when setting the document on the document stacker 3. The tension roller 5 is attached to the upper moving body 65.
It is attached to cover the front of 8.

Therefore, when a document is set on the document stacker 3 so as to be in contact with the trailing edge regulating plate 5, and then the chain drive source 72 is driven so that the upper moving body 65 moves forward, the trailing edge regulating plate 5 moves the document. It will move forward while pushing out. The lower edge of this trailing edge regulating plate 5 is provided with a protrusion 5a that can fit into a recess 3b of a shallow unevenness parallel to the paper feeding direction provided on the rear upper surface of the document stacker 3. It is configured so that it does not sneak into the system.

Reference numeral 73 denotes a home position sensor for the rear end regulating plate 5, and the sensor 73 determines the position where the blocking member 74 provided on the attachment 70 connected to the upper side of the chain 69 is detected as the home position of the rear end regulating plate 5. This home position is a position where the rear end of the maximum size (for example, A3 size) document can be brought into contact with the document.The document is moved forward from this point until the leading edge of the document 4 is detected by the stack sensor 27. The vertical size of the image can be read. Further, the stack sensor 2
7 detects the leading edge of the document, it outputs a lowering operation signal to the drive source 17 of the gate member 7, and also outputs a lowering operation signal to the drive source 17 of the gate member 7.
A stop signal is output to the drive source 72 of the chain 69 that moves the gate member 6, and the drive source 72 moves the gate member by a distance corresponding to the size of the original read from the trailing edge regulating plate 5 as described above. It is designed to output a signal that causes the vehicle to retreat from the front.

Reference numerals 75 and 76 denote presser rollers that come into contact with the paper ejection belt 56 from the outside of the paper ejection guide plate 55 through through holes at positions corresponding to the auxiliary rollers 60 and 61.

Reference numeral 77 indicates a ceiling guide plate whose base end is hingedly connected to the upper rear end of the both side skeletons 62 of the main body 2, and 78 indicates a ceiling guide plate connected to the upper stage movable body 65 on which the tension roller 58 is mounted on the upper part of the upper belt part of the paper ejection belt 56. The sheet discharge log guide plate 79 facing each other with a slight gap is a press roller that contacts the sheet discharge belt 56 through a through hole from the upper surface of the sheet discharge log guide plate 78. The ceiling guide +l 177 is provided with a plurality of ribs 80 facing in the paper ejection direction on the lower surface which serves as a guide surface, so that directionality can be imparted to the document.

A concave groove 81 formed on the upper edge of the upper edge of the rear plate of the paper discharge guide plate 78 is fitted into the rib 80 in a nested manner, and the document that has advanced along the guide surface of the ceiling guide plate 77 is guided by the paper discharge log. This ensures that the paper can be guided between the plate 78 and the paper discharge belt 56.

Reference numeral 82 denotes a switching claw provided in the middle of the paper ejection guide plate 55 for switching the processed document between a circulating paper ejection path A that leads to the document stacker 3 and an external paper ejection path B that moves the processed original to a paper ejection tray 83 outside the machine. , the switching pawl 82 is movable to open the external paper ejection path B when the trailing end regulating plate 5 returns to the home position, and opens the circulating paper ejecting route A when the trailing end regulating plate 5 is not at the home position. It is movable so that it can be opened. This switching action may be accomplished using a solenoid or other suitable mechanical mechanism.

Reference numeral 84 denotes a manual paper feed tray whose base end is hingedly connected to the top surface of the top end of the ceiling guide plate 77. Normally, the core paper feed tray 84 is folded back so as to overlap the top surface of the ceiling guide plate 77 as shown in FIG. When feeding documents one sheet at a time in SDF mode, it can be expanded to cover the front upper surface of the document stacker 3 (as shown by the two-dot chain line in Figure 1) using the hinge joint as a fulcrum. At this time of unfolding, the tip of the manual paper feed tray 84 reaches near the paper feed belt 21, so that it bridges the upper surface of the ceiling guide plate 77 and the paper feed port of the document stacker 3.

In addition, the 9-manual paper feed tray 84 has a document size (B5, B4, etc.) on the surface that becomes the top surface when unfolded (feeding paper) (the bottom surface when folded).
A4. A symbol and a number (not shown) indicating the document (A3, etc.) are attached so that the insertion position of the document can be determined.

Furthermore, the single manual paper feed tray 84 may be configured to actuate the SDF actuator 84' in the on direction when it is unfolded, and to actuate the actuator 84' in the off direction when it is returned to its original state. It's convenient.

In the embodiment described above, the originals are stacked with the copy side facing up, aligned in page order from the top, and set with the rear ends abutting against the rear edge regulating plate 5 at the home position. Furthermore, after regulating the width direction with the width regulating plate 6.6', input the number of copies to be made, and at the same time turn on the copy button, the gate member 7
The drive source 17 that drives the gate member 7 is activated, and the gate member 7 is raised to a position where the stacked documents can sufficiently enter therebeneath.

Next, the driving source 72 of the trailing edge regulating plate 5 is driven, and the document is pushed out in the paper feeding direction and passed under the gate member 7, and when the leading edge of the document is detected by the stack sensor 27,
The drive source 17 operates to lower the gate member 7. At this time, the pin 14 installed on the shaft 11 that supports the gate lever 12 rotates to a position sufficiently away from the gate lever 12. Therefore, the gate member 7 can always press the upper surface of the document downward with its own weight regardless of the amount of documents. Further, the lower edge of the gate member 7 has a comb-teeth shape, and in combination with the upper surface rib 3a of the document stacker 3, the document is pressed against the paper feed belt 21 while forming a waveform in the document.

As described above (when the push-up pin 14 is sufficiently far away from the gate lever 12, the gate cam gear 16 is connected to the drive source 1).
7, and the half-moon rollers 28, 2 are rotated by moving up and down the clutch lever 31, which is engaged with the protrusion 30b of the outer cylindrical body 30a of the one-turn spring clutch 30 by the cam forming portion 16b.
9 is connected to the main motor 100 and the extrusion belt 20 is run, the original is transferred to the paper feed belt 21 and the stop roller 22.
It is pushed out towards the nip. At this time, the paper feed belt 2
1 remains unrotated by the action of the electromagnetic clutch 21a, the extruded original enters the nip between the paper feed belt 21 and the stop roller 22 in a tree shape than the lower layer and is stopped.

Next, the electromagnetic clutch 21a is turned on, and the paper feed belt 21 rotates in the paper feeding direction. At this time, the stop roller 22 in contact with the paper feed belt 21 is maintained in a non-rotating state, so the bottom layer of the document is sent out by the paper feed belt 21, and the second and subsequent documents are transferred to the stop roller. It is suppressed by 22 and 9 double feeding is prevented. When the paper feed belt 21 rotates, the extrusion belt 20 also starts in synchronization, and during one rotation it attracts and separates only the bottom document sheet from the stack of documents stacked above it, and in the paper feed direction. It acts to push it towards. In other words, the function of preventing double feeding of the stop roller 220 is further improved.

As described above, the trailing edge regulating plate 5 stops when the leading edge of the document is detected by the stack sensor 27, and then retreats from that position to a specified position determined by the size of the document.

(Thus, a sheet of original sent out by the paper feed belt 21 enters the forward path 35, is nipped by the conveyance roller 38 provided on the way, and is transferred between the platen glass 36 and the conveyance belt 4.
1 at a synchronous exposure speed. After the leading edge of the document crosses the synchronization sensor 85 provided in the middle of the forward path 35 (directly below the conveyance roller 38), the electromagnetic clutch 21a is turned off at a timing for each size.

The original transported by the transport roller 38 is transferred to the transport belt 41.
While conveying the image on the platen glass 36 at a synchronous exposure speed, the image is exposed using a fixed optical system 53 to create an image on the drum. The exposed document moves upward along the paper ejection guide plate 55 and is conveyed while being held between the paper ejection belt 56 and presser rollers 75 and 76 that are in pressure contact with the paper ejection belt 56.
Exit to the top side and move forward along the guide surface of the ceiling guide plate 77.

The paper is guided to the lower side of the paper ejection log guide plate 78, passes between the paper ejection belt 56 and the presser roller 79 that is in contact with the paper ejection belt 56, and is ejected toward the original stuff car 3.

In this way, the originals discharged onto the original stacker 3 hit the gate member 7 and are aligned for the next feeding. In this case, since the lower edge of the gate member 7 has a comb-teeth shape, the document is prevented from slipping under the gate member.

The above-mentioned feeding operation is changed to the feeding timing and synchronous conveyance speed determined for each copy size and copy magnification, and is repeated until there are no originals under the gate member, and the stack sensor 27 detects that there are no originals under the gate, and finally When the paper ejection sensor 86 detects that the original is ejected.

The gate member 7 is raised again, the stacked document is sent out using the trailing end regulating plate 5, and the above operation is repeated until the set number of copies is completed, and this is detected by the paper ejection sensor 86. Then, the rear end regulating plate 5 returns to its home position and prepares for the ninth operation.

Note that the above operation is for making a single-sided copy of a single-sided original, but it is possible to make a single-sided copy of a double-sided original by using the 9 reversing path 37, and if the copying machine is equipped with a duplex conveying means, it is possible to make a single-sided copy of a single-sided original. Double-sided copying of originals and double-sided copying of double-sided originals are also possible.

Next, a case will be described in which nine manual paper feed trays 84 are unfolded and a document is fed in the SDF mode.

In this case, the manual paper feed tray 84 is unfolded with the gate member 7 in the raised position. As a result, the stop roller 22 becomes rotatable as a result of the rotation of the paper feed belt 210 by the action of the spring clutch 24. Therefore, when the original 4 is manually fed into the paper feed slot along the two-manual paper feed tray 84, the original is transferred to the paper feed belt 21 and the stop roller 22 that follows it.
It will be nipped in between and be sent out smoothly.

The document sent out in this way is guided onto the platen glass 36 through the forward path, and is conveyed by the conveyor belt 41 to the exposure position on the platen glass 36, where it hits the document stopper 50 projecting there and is stopped. The optical system 54 is then moved to expose and create an image on the drum. Exposure by moving the optical system 54 is repeated for one copy.

After the exposure process, the original is sent in the ejection direction by retracting the original stopper 50 and reactivating the conveyor belt 41, and is ejected from the external paper ejection port via the switching pawl 82 provided in the middle of the ejection guide plate 55. It is discharged into a tray 83.

Note that in the SDF mode, if the document 4 is a double-sided document, it is possible to use the reversing path 37 as necessary.

〔Effect of the invention〕

As explained above, the present invention is an RD that separates originals one by one from the paper feed port of the original stacker, feeds them to the processing section, and returns the processed originals to the original stacker for repeated feeding.
F mode and SD mode, in which the original is manually fed from the paper feed slot to the processing unit, and the processed original is ejected to the output tray outside the machine.
F mode, the document feeder is characterized in that a movable manual paper feed tray is provided in the paper feed port, so that the manual feed tray can be moved to the document stacker paper feed port when manually feeding paper. For example, even if a document is set on the document stacker, manual paper feeding can be easily done from the same paper feed port, while if it can be moved to the original position, it will not interfere with the operation of setting the document in the document stacker in RDF mode. It has excellent effects.

[Brief explanation of drawings]

1 to 13 show embodiments of this invention. Fig. 1 is a front sectional view of the main body of the document conveying device, Fig. 2 is a perspective view showing the document stacker and paper feeding mechanism, and Fig. 3 is an explanation showing the deformed state of the document pressed onto the document stacker by the gate member. Figures 4A and 4B are explanatory diagrams showing the operating state of the gate member, Figure 5 is a partially cutaway front view of the spring clutch provided on the stop roller shaft, Figure 6 is a side sectional view of the same, and Figure 7. is a perspective view of the one-rotation control mechanism of the half-moon roller, FIG. 8A
, B is an explanatory diagram showing the operating state of the same rotation control mechanism, FIGS. 9A and B are explanatory diagrams showing the operating state of the extrusion belt (half-moon roller), FIG. Figure 11 is a perspective view showing the operating mechanism of the original stopper;
FIG. 2 is a perspective view showing the rear side of the document stacker, and FIG. 13 is a schematic perspective view showing a drive mechanism for the paper ejection belt and the rear end regulating plate. 1 - Copying machine body 2...-Document transport device 3...-Document stacker 4--Document 20--Extrusion belt 21-Paper feed belt 22-Stop roller 84--Manual paper feed plate Patent Applicant: Konishi Rokusha Kogyo Co., Ltd. Figure 2 Exit 113 Figure 4 (A) (B) Dor and 1 23 Figure 5 Figure 6 ■ Figure 7 Figure 8 (B) Figure 9 Figure 1O Figure Q Figure 1I Figure II Figure 12

Claims (4)

[Claims] (1) The RDF mode allows you to separate documents one by one from the document stacker's paper feed port, feed them to the processing section, and then return the processed documents to the document stacker for repeated feeding. In a document conveying device equipped with an SDF mode that manually feeds paper toward a processing section and discharges the processed document to a discharge tray outside the machine, a movable manual paper feed tray is provided in the paper feed port. Characteristic document transport device. (2) The document conveying device according to claim 1, wherein the manual feed tray is foldably provided on the upper surface of a ceiling guide plate that covers an upper rear portion of the document stacker. (3) The document conveying device according to claim 2, wherein the manual paper feed tray bridges the upper surface of the ceiling guide plate and the paper feed port of the document stacker when the manual feed tray is unfolded. (4) The document conveying device according to claim 1, wherein the manual paper feed tray also serves as an on/off switching means for an SDF mode switch.