JPS60106739A - Circulation type sheet feeder - Google Patents

Abstract

PURPOSE:To achieve high speed copying by providing two sheet processing stations or document exposing sections thereby enabling document feed selectively under two modes of document carrying exposure system and fixed document exposure system. CONSTITUTION:The undermost document (O) on a tray 10 is led through sheet separation/carrying mechanism 11 and sheet path 12 to the left of platen glass 1 then carried on a carry belt 13 to predetermined position on the platen glass 1. Upon completion of exposure process, the document is led on the carry belt 13 to the sheet path 14 then returned from the document discharge section 15 onto the tray 10. Here, the platen glass 1 as the first processing station is extended further to the left than the left side of carry belt 13 to use said extended section 1' as second processing station and a reflection board 27 is arranged above said section 1' to realize the purpose.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention separates sheets stacked in a sheet stacking section from 1 to 1, feeds them to a predetermined processing section, and then sorts the stacked sheets of the sheet stacking section again. The present invention relates to a circulation type sheet feeding device that repeatedly performs a cycle of upward conveyance.

A typical example of such a circulating sheet document feeder is a circulating sheet document automatic feeder R (RDF device) installed in an image forming apparatus such as a copying machine. For convenience, this RDF device will be explained below as an example. Fig. 1 shows the general failure of the conventional RrJF skin with pole < 5. 5-2, B
is the general name No. 1- of the RDF device installed on the top panel z including the platen glass I of the main body of the copying machine.

10 is a sort document stacking tray as a sheet stacking unit provided on the RDF device B side, 0 is a set of multiple sheet document sheets (1nl document per page) stacked and set on the tray, and young pages are stacked on the tray. The two sides are placed on the page 111n with the image surface facing upward.

Due to the copy start command, the stacked original O on the tray IO is
Among them, the document in the highest position is sent into the first sorting path 12 by the one-sheet separation and conveyance mechanism ll and guided to the left side of the platen glass l. Next, the original is placed between the platen glass l and the endless original conveying belt 13 (hereinafter abbreviated as full-surface belt), which is in full pressure contact with the negative side of the glass and is driven in forward rotation. The platen is guided downward and is conveyed slidingly from the second and third sides to the right side by the forward rotational force of the full-surface belt 13. When the rear wheel of the document reaches the reference line position 1 of the platen glass 1, the rotation of the full surface bell 13 is stopped.

As a result, the original is automatically fed and set at a predetermined position on the platen glass 11-.

”; When the IF rotation of the belt 13 is stopped, the
The movable optical system 3 on the machine A side of the f machine is driven to optically scan the downward image plane of the document set stationary on the platen glass l. As a result, the image forming exposure (slit exposure) of the original image on the surface of the rotary photoreceptor 9 is performed, and copying is performed in cooperation with other image forming process equipment (not shown).

When the scanning of the document on the platen glass by the movable optical system 3 is completed, the full surface bell (13) is driven to rotate in the reverse direction. As a result, the exposed original on the platen glass l is conveyed (return conveyed) by sliding on the glass toward the left side by the reverse rotational force of the belt, and is introduced into the second sheet path 14, and the sheet passes through the sheet path. 1 Autumn equinox
The lowest original (first page original) of the stacked originals O in the tray "-" is discharged onto -1- with the image surface facing upward.

On the other hand, the lowest original next to stacked original 0 on the tray 10 is introduced into the first sheet path 12 by the operation of the single sheet separation and conveyance mechanism IT, and the leading edge of the original is placed on the platen glass.
The full-surface belt 13 has been switched to the forward rotational drive a when it reaches the area between the left side of
The platen color is conveyed to the right by U, and as with the downward-facing document, the entire surface bell) 13 stops rotating, tq document is set, Ato optical scanning → the entire surface bell) is reversely conveyed by the reverse rotation of 13, and then the tray ■ A discharge to 0 is made.

The feeding and ejection cycle to the platen glass l as described above is executed sequentially for each document loaded and set on the I-ray 10.
When all the originals for one set above are circulated once, all v,
When one copy of the loaded original is subsequently turned over a predetermined number of times and circulated, a predetermined number of copies are obtained. Therefore, it is extremely effective in automatically and quickly copying a large number of sorted documents.

The movable optical system 3 of the copying machine A in this example has an original illumination lamp 4.
・Moving first mirror 5・same fffj2 mirror 611 imaging lens 7・1. Consists of 8 constant mirrors, 4 Φ lamps
Move! jlI first mirror 5 and second mirror 6 are always 14
The solid line water position on the left side of the surface 1 nib latin crow l is on standby as the tenth position, and the lamp 4 is turned on based on the optical system movement start signal, and the lamp 4 and the first mirror 5 are turned on based on the optical system movement start signal.
and the second mirror 6 is driven forward along the lower surface of the platen glass l toward the right side of the glass at the same speed V as the rotational circumferential speed of the photoreceptor 9, and at the same speed. Due to this action of the optical system, the RDF device B causes the platen glass 11 to
The downward image surface of the document fed and set is sequentially optically scanned from the left side to the right side. Lamp 4, 1st and 2nd
When the mirrors 5 and 6 reach the end point of their forward movement (indicated by a two-dot chain line), the lamp 4 is turned off, and they move forward again to return to their initial home positions and wait until the next movement start command is issued. There is also a method in which the document surface is optically scanned during the backward movement process of the optical system.

C) Various mechanisms and systems are known as the single-sheet separation and conveyance mechanism 11. In this example device, the sheet feeding bell (1) mounted on the F side is rotatably driven in one direction in the sheet feeding direction.
6, and a sort separation belt 17 arranged on the upper side Y and rotated in a direction opposite to the sort feeding direction. The detailed structure of this mechanism and the principle of separating and conveying one sheet are well known, so a description thereof will be omitted.

18 is the exterior body of the RDF device B, 19 and 20 are the driving rollers and turn rollers of the full-surface belt 13, and 21 is a belt pressing roller that applies the lower surface of the entire 1h1 belt to one surface of the platen glass; ) 13 acts to increase the conveyance force along the glass surface of the document due to the forward and reverse rotation of the document. The document stacking tray 10 is arranged in an inclined position, for example, about 200 degrees toward the sheet 1/equin #conveying mechanism 11.

The RDF device B is a platen glass l centered around a hinge (not shown) provided at the rear of the device. The entire structure is equipped so that it can be raised and lowered freely, and from the thickness of wood, etc., to the thickness of the wood, etc. - ``original documents and other originals for which an RDF device cannot be used (for manuscript copying, use RDF device B as a platen crow'').
Open the window and place a human document with the image side facing down on the platen glass 11.
The second original is held down by the lower surface of the full-surface belt 13 and copied.

Incidentally, some RDF apparatuses B are equipped with a mechanism for reversing and re-introducing the original to the platen glass l, thereby making it possible to perform double-sided copy processing for double-sided originals.

By the way, as a measure to increase the speed of copying as much as possible in a copying machine equipped with the conventional RDF device B as described above, for example, (1) Regarding the RDF device B, the document loading tray lO
The feeding speed of the document from the tray 10 to the predetermined position l on the platen carnula l, and vice versa.
(2) For the copying machine main body A, the return speed of the moving optical system 3 that scans the original in the return process to the home position is increased to 0. One possibility is to speed up the process.

In other words, from the start of automatic document feeding from the document stacking tray 10, the copy of the fed document is transferred to the copy tray of the copier A.
This is intended to shorten the periods of various process sections that are not related to actual image formation and that are included in one copying cycle process until being ejected to a printer (not shown).

However, increasing the speed of document feeding and initial feeding as described in (1) above has its own limitations because it increases the number of documents. In the case of (2), the mechanical load increases, causing stop shock, vibration, etc. to be less than 1, which adversely affects other systems.

The present invention has been developed and proposed in view of the above points, and uses a rational document feeding/1A feeding method to achieve high speed without causing the problems mentioned above. It is an object of the present invention to provide a circulating sheet feeding device of this kind that enables copying, etc. The main point is the structure.

The following is based on one embodiment of the apparatus shown in FIGS. 2 to 5! Explain in L form. FIG. 2 shows an RD structure according to the present invention.
FIG. 3 is a view of the drive mechanism of the device, FIG. 4 is an enlarged W side view of the document circulation r detection mechanism, and FIG. 5 is a side view of the device.

Components common to those of the conventional device shown in FIG. 1 are denoted by the same reference numerals, and explanations thereof will be omitted.

Similarly to the example in Figure 1, the RDF device B in this example can be freely raised and tilted as a whole against the top surface of the platen glass l on the side of the copying machine A side, centering on the hinge provided at the rear of the device. It is equipped.

The platen glass l extends further to the vicinity of the left side of the front panel 2 of the copying machine main body than the left side of the full-surface belt 13 that covers the glass.

The portion 1 will hereinafter be referred to as the Braten glass extension.

, 27 are reflectors 28 and 29 which are located facing the -1- plane of the platen glass extension l with a gap 7 when the RDF device B is folded down and closed with respect to the platen glass l. are disposed on the front and rear sides of the reflector plate 27, respectively, and are in contact with the upper surface of the platen crow extension part/l, and are conveyed by the first and second document elongation ratios J (r82 sheet). The document input portion of the pass 14 is located near the opposite side of the conveyance roller 29 from the reflector 27 of the second document pressing section.

The lamp 4 and the first and second mirrors 5 and 6 of the movable optical system on the side of the multi-gage machine wood machine A are attached to the platen crow extension 1'(7)''F.
When the wrap 4 is turned on while the movable optical system is in the home position standby state, the surface of the reflector plate 270F is illuminated.

Reference numeral 30 denotes a pair of document transport rollers disposed in the middle of the first sheet path 12, 32 a pair of document discharge rollers disposed at the document discharge port 15 of the second sheet path 14, and 33 and 34 the second sheet. A pair of document relay conveyance rollers are respectively disposed in the middle of the path 14.

5a-3b, is there a document on the document stacking tray io?j'? The document right non-detection sensor (transparent, !l'
l), S l-34 are the first to fourth sea I sensors (reflection type) arranged at important points in the document transport path system to detect the arrival and passage of BX documents, and that of zl is the 1 Sea I
・In the manuscript person ['' section of pass 12, the second one is next to roller pair 30 in if receipt toss 12, and that of J3 is the first one.
For pressing the original, the fourth
are respectively arranged in the document-population section of the second sheet path 14.

Reference numerals 35 and 36 denote a rotating arm of a mechanism for detecting the end of circulation of an original, and several partition plates supported by the arms.The mechanism for detecting the end of circulation of an original (FIGS. 4 and 5) will be described later.

37 smoothly guides the document from the first sheet path 12 side to the space between the left end of the full-surface belt 13 and the platen glass l, and reversely transports the document from the platen glass l by rotating the full-face belt 13 in the opposite direction. 3) Make sure that the first document is pushed in the direction of the transport roller 28 without causing the document to enter the first sheet path 12 backwards. The document guide tab (located in the [ ] section)
deflector). This tongue piece is made of a flexible synthetic resin sheet such as polyethylene terephthalate (trade name Mylar). The tip side J is arranged in contact with the inner surface of the upper guide plate 12b, and the original is moved from the first saw dox 12 side to the switch bank passage 26 side by the above-mentioned flexible elastic meter piece 37. The switch pack passage 26 is entered by passing through the switch pack while pushing the tongue piece 37 open.

Conversely, the document transported from inside the passage 26 by the switch is prevented from entering the first jet nozzle 12 in the opposite direction due to the presence of the tongue piece 37, and the document is reliably pushed into the first document. Conveyance roller 28 direction - - Toward.

Reference numeral 38 denotes a removing forceps disposed at the document ejection port section 15 of the second sheet path 14, which removes the document from the document ejection port section 15 on the 11th day.
Static electricity on the original O returning to the original stacking tray 10 side
After removing the hair, return the paper to the tray! − It works to load smoothly one after another.

The portion of the platen glass 1 that faces the full surface bell 13 in the apparatus of this embodiment is the first sheet (original) processing station, and the portion of the platen glass 1 that faces the reflective plate 27 is the second sheet (original) processing station. The drive mechanism shown in FIG. 3, which is probably the sheet processing station in FIG. Ml is the first motor, M2 is the second motor
It's a motor.

Bl is a drive pulley 3 fixed to the rotating shaft of the first motor Ml.
9. A first pulley 41, which is suspended from an intermediate pulley 40 and a pulley 41 fixed to the shaft of a pair of original ejection rollers 32.
Heald, B2 is the intermediate pulley 40 and the first seat path 1
The second belt is suspended around a pulley '42 that is fixed to the shaft of one of the pair of document transport rollers 30 disposed in the document transport roller pair 30, and the document transport roller pair 32 and the document are suspended at the same time as the first motor Ml starts rotating. The transport roller pair 30 is driven to rotate in the normal direction.

43 and 44 are gears fixed to the shafts 47 and 48 of the sorting and feeding belt drive roller 45 of the sheet separation mechanism 11 and the sheet separation belt drive roller 46, respectively, and 49 is the gear that controls the rotational force of the intermediate pulley 40 These are electromagnetic clutches that transmit information to the two motors 43 and 44, respectively. When the clutches and chis are turned on (11!1 ton) while the first motor M1 is driving, the sheet feeding heald 16 starts sorting feeding. ; The sheet separating belt 17 is driven to rotate in the direction opposite to the sea I/feeding direction. When the clutch is turned off (de-energized), the rotational drive of both the belts 16 and 17 is stopped.

50 is @h 19a of the drive a-ra 19 of the full-surface belt 13
A gear 51 fixed to I transmits the rotational driving force of the first motor Ml to the gear 50 in forward rotation or reverse rotation.
This is an F rotation/stop/reverse switching clutch (electromagnetic clutch). While the first motor Ml is driving, when the flange is switched to normal inversion and held (common), the entire surface is bell) 1
3 is W-rotated (j: the direction in which the document is conveyed toward the right side of the platen glass L), and is switched to the reverse direction and held (no current applied).
When this is the case, the document is driven in reverse (the direction in which the document is reversely fed toward the left side of the platen glass l).

B3 is a drive pulley 5 fixed to the rotating shaft of the second motor M2.
2. The first δ reading and the second document pressing are carried out by the transport rollers 28 and 29.
A third bell (suspended between three pulleys 53 and 54 which are rigidly rounded on each axis), B4 is also the drive pulley 52, and one roller of the pair of original conveyance rollers 33 in the second sheet path 14. The fourth belt is suspended between three pulleys: a pulley 55 fixed to the shaft of the second document transfer roller pair 34, and a pulley 56 fixed to the shaft of one roller of another pair of document relay conveying rollers 34. On the other hand, the first and second document pushing rollers 28 and 29, and two pairs of document intermediate conveying rollers 33 and 34 are driven to rotate normally by the rotational drive of the second motor M2.

In the original circulation end detection mechanism shown in FIGS. 4 and 5, 46a is a driven roller paired with the sliding roller 46 of the sheet separating bell L-17, 46b is the driven roller, and 47 is the bearing of the driven roller. It also serves as a cover plate for the top surface of the seat separation belt. The front end and rear ring portion of the driven roller 46b are made to protrude outward from the hand 111 side of the distribution plate 47 and the rear side plates 47a, 47a, respectively. , side plates 47 on the front side and the back side of the plate 47 in relation to each of the protruding shaft parts.
A and 47a are provided with two sets of partition plate rotation mechanisms facing each other on both sides. 'The two partition plate rotating mechanisms have the same resultant mechanism. 60 is a gear fixed to the external force protruding end of the side plate of the driven l+ 46b, 61 is a shaft pin whose base is implanted on the outer surface of the end of the side plate 47a on the supporting side of the driven shaft 46b, and provided parallel to the shaft 46b; 62 is the shaft thereof. The driven gear 35, which is loosely fitted on the pin and meshed with the gear, has its base loosely fitted on the shaft pin 61, and is attached to the side surface of the driven gear 62 with a friction plate 64 interposed therebetween.
, I'm constantly being attacked! This is a rotating arm supported by E.

This arm 35 is a seat separation bell!・17(7) The rotational force of the driven roller 46a accompanying the rotational drive is transmitted via the shaft 46b → gear 60 → passive gear 62 → friction plate 64,
It receives a rotational force in the clockwise direction G in FIG. 5 about the pin shaft 61.

36 is a partition plate which is rotatably supported on the tip side of the arm 35 described in -, and 67 is stretched between pins 68φ69 implanted in the tip of the arm 35 and the partition plate 36 side, respectively. It is a strong spring. Using the tensile force of the spring 67 of the partition plate 36, the position of the car 66 is set as a thinking point (dead point) and click-driven to the left and right sides, and the arm 35 is opened approximately at right angles as shown by the solid line in FIG. The first posture is maintained in a second posture shown by a two-dot chain line in which the arm 35 is overlapped and closed.

The arm 35 is normally held at its home position at an upward substantially right angle rotation position as shown by the two-dot chain line in FIG. 5, when the single sheet separation mechanism 11 is stopped. Further, the partition plate 36 at the tip of the arm has a first shape that opens approximately at right angles to the arm 35.

When the originals O are stacked and set on the original stacking tray 10 and a copy start button (not shown) is pressed, rotational driving of the sheet feeding belt 16 and separation belt 17 of the sheet 1 equinox # mechanism 11 is started. Then, in conjunction with the start of rotation of the separation heald 17, the arm 35 rotates clockwise from the vertical home position around the carriage pin 61, and when rotated approximately 90 degrees, the lower surface of the partition plate 36 is placed between the trays 10" and 10". It is accepted as "sit" on the - side of the resistance manuscript O (Fig. 5). As a result, further rotation of the arm 35 is prevented, but on the separation belt 17 side, the side surface of the driven gear 62 and the side surface of the base of the arm 63 resist the frictional force via the friction plate 64. The rotational drive continues without any hindrance due to the slippage. In addition, the arm 35 is moved by the shaft pin 61 due to the frictional slipping force mentioned above.
By continuing to receive the clockwise cutting force centered on
The structure is suppressed on the upper surface of 16. Due to the suppressing action of the partition plate 36 on the bell) 16 of the stacked original O, the lowest original of the stacked original 0 can be reliably conveyed in one branch # by the cooperation of the sheet feeding belt 16 and the same separation bell) 17. . Further, a roller 70 that receives the load of the partition plate 36 is attached via a sheet feeding bell (16). This further increases the force with which the partition plate 65 presses the document against the belt 16.

The separation and conveyance of one sheet of the stacked originals O on tray 1O'2 proceeds sequentially, and the last document on which the partition plate 36 is directly placed is conveyed, and when its trailing edge passes under the partition plate 36, 9J
The lower surface of the plate 36 is brought into direct pressing contact with two surfaces of the sheet feeding heald 16. Then, the rotating force of the belt 16, which continues to be rotationally driven, acts on the partition plate 36 in the direction E in FIG. (Bell is converted to the second posture shown by the dotted chain line) 16. 16 and Jino have a relationship. Then, the arm 35 continues to rotate the shaft 61 in the direction 51 at the time of arrow G in FIG. Crosses the sensor optical path and passes through.

Due to dirt, all originals in tray IOJ, : are loaded with original 0.
Circulation is detected.

When the cam portion 36a of the partition plate 36 in the closed state with respect to the arm 35 contacts and passes the fixed shaft member 72, the attitude of the partition plate 36 is changed again to the first attitude in the open state with respect to the arm 35. When the arm 35 rotates to the home position, which is the upward substantially vertical rotation position N (double-dashed line in FIG. The rotational drive of 117 is stopped and stands by.

45a is a driven roller paired with the sheet feeding belt drive roller 45, and 47a is its roller shaft.

Next, the overall operation of the RDF device B of this example will be explained in detail. Circulating manuscript feeding with this device B! Mr. f; is a first feeding system in which exposure processing of the fed original is performed at the second sheet processing station, which is the first surface portion of the platen crow extension (original illumination section L) facing the reflector plate 27. The platen glass 1 faces the mode, the sheet of t51, and the entire belt 13 which is the processing station.
Second feeding mode for partially feeding the document There are two modes, and it is possible to select one of these modes to feed the original document.

(2) First feeding mode (1) Documents 0 to be copied are stacked and set on the document stacking trays 1O-L: up to the top of the image plane. This manuscript Sera I.
The optical path of the document presence/absence detection sensor 5aaSb is cut off, and the presence of the document is detected. Copy machine operation panel (not shown)
After setting the automatic document feeding copying in the first feeding mode, the number of copies, the copying magnification -1, and other required copying lines ft, the copying start button is pressed.

(2) Then, among the first and second thousandth motors Ml-M2 of the drive mechanism (FIG. 3), the first motor Ml starts to be driven, and in conjunction with this, the document is transported in the first sheet path 12. Laura vs. 30. Original output section 1 of second sheet path 14
The rotation of the pair of document ejection rollers 32 of No. 5 is started. In addition, the electromagnetic clutch 49 is turned on, the clutch 50 is held in the normal rotation side, and rotational driving of the sheet feeding belt 16 and separation belt 17 of the sheet 1/autumn # conveying mechanism 11 is started, and the entire surface belt is rotated. 13 drive rollers 19 are driven to rotate in the normal direction, and the entire belt 13 becomes in the normal rotation a-shape jB. Further, the movable optical system 3 on the side of the copying machine main body A remains in standby at the home position, and the lamp 4 is turned on. (3) In conjunction with the start of the rotation of the sheet separation peru 1-17 of the sheet 1-1 sheet separation and conveyance mechanism ii, the partition plate 36 rotates clockwise from its home position facing -L as described above. Document 0 loaded on tray 10, h is held down.

(4) Also)・Inscription on Rei 10・Complete manuscript 0 no Sodo Ibara JU
Regarding G, the sheet feeding bell) 16, douban majesty, and belt 17 work together to separate and convey one sheet.

(5) Autumn equinox from Organization 11! 1111ff? The fed original enters the first sheet path 12, is relayed by a pair of original transport rollers 30, and enters between the left end of the full-surface belt 13 and the platen crow 1.1. The platen glass l''- is slid and conveyed to the right with the image surface facing C by the full surface bell) 13 which is rotating in the forward direction. In addition, roller pairs 30, full-surface belt 13
The document conveyance speed is set to approximately twice the sort conveyance speed of the mechanism 11.

(6) First sheet sensor S14 at the rear end of the transported document
When the sensor Sl detects the passing of the 6th position, the electromagnetic clutch 49 is turned off at the time of detection, and the driving of the single sheet separation and conveyance mechanism 11 is temporarily stopped.

(7)" - In (5), the original is conveyed to the right on the platen glass l by the forward rotation a of the full surface bell) 13, so that the rear edge of the original is at the position of the guideline of the platen glass 1. 1, the forward rotational drive a of the full-surface belt 13 is stopped, thereby stopping further conveyance of the platen glass to the right. -1- Stopping of the forward rotation drive a of the full-surface belt 13 - is the second stop of the rear end portion of the document that has entered from the first sheet path 12 between the platen glass 1 and the full-surface belt 13 in the forward rotation state E1. When passage of the sheet processor S2 position is detected by the sensor S2, a timer is started at the time of detection, and when a predetermined timer period expires, the clutch 50 is switched and held at a position where the drive roller 19 of the full-surface belt 13 is stopped. It is done by

After the clutch 50 is switched to the position where the full-surface belt drive roller 19 is stopped for one day, it is immediately switched to the reverse rotation drive side and held, and the full surface belt 13 is rotated to the reverse rotation drive side. Due to this reverse drive of the full-surface belt 13, the platen glass 2 is pressed, and the transport roller 2 presses the upper original or the first original.
It is transported backwards (switch pack transport) towards 8-1.

(8) Reverse direction toward the first document pressing conveyance roller 28 (the leading edge of the stored document passes through the third sheet path S3 position, and then the second document whose rotation is stopped I-2 at that point) The pushing of the original is received by the contact nip between the conveying roller 28 and the platen glass extension l.This pushing and pulling of the first original is received by the conveying roller 28 and the second original of the same day -ra 29 and the second sheet width 14. Together with the pair of intermediate conveying rollers 33 and 34, the second motor M2 of the drive mechanism starts to be driven when a predetermined timer period elapses after the leading edge of the reversely conveyed document passes the third sorting sensor S3 position. In this way, the leading edge of the reversely conveyed original is received by the roller 28, and the timing with the paper feeding process on the copying machine A side is adjusted ( (resist) is done.

(9) When the ffil document is pressed, the conveyance roller 28 starts to rotate, and the 1g document is pressed against the upper surface of the platen glass extension l while moving to the reflection plate 27, which is the second sheet processing station.
The second original document is introduced into the gap between the two surfaces of the platen glass extension l and the platen glass extension l, and is then pressed down by the conveyance roller 29, and the platen glass extension l It is transported while being placed on the top surface of the container. The flit part of both rollers 28 and 29 is now a manuscript! It is said that there is 1 light part. The reverse rotation of the full-surface belt 13 is achieved by driving the second motor M2 to rotate the rollers 28 and 29 and the roller pair 3.
When the rotation of 3.34 starts, the clutch 50 is at the stop position! ilJ was changed and stopped. Although the full-surface belt rotates in the reverse direction, even when it stops, the leading edge of the document is already gripped by the conveyance/σ-ra 28 and one surface of the platen glass extension, so the rotational force of the roller 28 is applied. The sheet is then conveyed to the second sheet processing station, the document illumination section. The document portion that has passed through the document illumination section then enters the second sheet path 14, is sequentially relayed by a pair of relay conveying rollers 33 and 34, and heads toward the document exit [J-15]. The conveyance rollers 28 and 29 are used to press the first and second documents, and the conveyance speed of the document 111 by the pair of intermediate conveyance rollers 33 and 34 is set to a constant speed that corresponds to the rotational drive circumferential speed of the photoreceptor surface on the A side of the copying machine. It is.

(lO) During the process of passing through the original illumination unit, the downward facing image portion of the original is sequentially illuminated by the lamp 4.3 Reflected light from the original surface is sent to the moving optical system 3, which is held on standby at the home edge. The light enters and is imaged and exposed on the surface of the photoreceptor through the optical system, and the copying process of the original is executed.

In other words, the exposure of the original image to the photoreceptor is the second sheet L.
At the original illumination section, which is a processing station, reading is carried out using a moving original reading (original moving fog light) method.

(11) The trailing edge of the document passes through the document illumination unit, and the second document push also passes under the conveyance roller 29 and passes the fourth sheet sensor S4 position.The force is detected by the sensor S4. Then, at the time of detection, the drive of the second motor M2 is stopped, and as a result, the drive of the first motor M2 is stopped. During the second document pressing, the rotation of the conveyance rollers 28 and 29 and the intermediate conveyance roller pair 33 and 34 in the second sheet path 14 is stopped. Even if the rotation of the relay conveyance roller pair 33 and 34 is stopped, at this point the leading edge of the document has already been transferred to the document discharge section 1 of the second sheet bus 14.
The paper is held between the rollers of a pair of ejection rollers 32 which are arranged in the document stacking tray 1Oj- and are rotated in the same direction.
It is kicked out in two directions, and is automatically reloaded on top of the unexposed original 0 located above the partition plate 36 of the tray 10'' with the image surface facing upward (as shown by the two-dot chain line in FIG. 5). Also tray l
OJ, :σ] An unexposed original 0 and an exposed original fA Oζ to be reloaded thereon are distinguished by a partition plate 36.

(12) Separating and transporting the next original from h-ray 10 is as follows:
When the sensor S4 detects that the leading edge of the document that has passed through the document illumination section reaches the fourth sheet sensor S4 position, the electromagnetic flange 49 is turned on 11 times, and the sheet 1 is turned on.
Autumn equinox! It starts when the I transport mechanism 11 is driven again.

(13) At the same time as re-driving the mechanism 11, the crank and the punch 50
is switched to the forward rotation side, and the full-surface bell (13) is switched to the stop rotation drive and maintained. In this case, the original size is large, and at the time of switching forward rotation of the full-screen bell (2) 13, the trailing edge of the previous reversely conveyed original is still between the left end of the full-screen heald 13 and the platen glass l. Even if not, the leading edge of the original is already pushed by the first and second originals by the transport rollers 28 and 29.
When the document is strongly pressed against the upper surface of the platen glass extension l, it is being conveyed, and the force of the conveying force is larger than the original pulling β return force caused by the stop-rotation drive of the full-surface belt 13. The document continues to be stably transported and passes through the document illumination section.

(+4) - In (12), the next document transported by one autumn equinox #j± enters the first G-Dox 12 in the same way as the previous document, is relayed to the document transport roller pair 30, and is transferred to the platen. The sheet enters between the crow l and the full-surface belt 13, and is drawn and conveyed to the right over the platen crow l by the full-surface belt 13i, which is switched to iF conversion/short drive. Also, at the Oj7 point where the trailing edge of the original passed the first sheet sensor S1 position, as in the case of the previous original, the drive of the transport mechanism 11 is stopped by the electromagnetic clutch 49σ) turned off. -yreru. Then, when the trailing edge of the original document has passed the second sea I sensor S2 position, the rotational force of the entire surface belt 13 (' is switched to reverse rotation) as in the case of the previous original document.

In this case, the leading edge of the original is already connected to the left end of the full-surface belt 13, which has been changed to normal rotation drive a, and the platen crow l.
When you reach the part between the two, there is still IjX ahead! Even if the rear end of 66 does not pass between the full-face belt 13 and the platen glass 1, both originals will slip between the full-face belt 13 and the platen glass 1, so the next original will be placed on the full-face belt 13. As explained in (13) above, the rear end of the document on the right side of the platen glass l is pushed by the forward rotation force of the first and second documents by the conveying force of the conveying rollers 28 and 29. The pulling force allows it to be transported in the forward and reverse directions without any problems. Specifically, the entire surface belt 13 is made of a material with a large friction coefficient, such as urethane, so that the force between the belt 13 and the original is greater than the frictional force between the originals.

r15) Also, the trailing edge of the next document is detected by the second sheet sensor S24
<(At the time when the full-surface belt 13 should be switched to the reverse direction after reaching the position, if the trailing edge of the previous document has not yet passed the fourth sheet sensor S4 position, the fourth sheet sensor S4 The full-page belt 13 is held in a stopped state until the rear edge passage detection signal of the original is issued, and the next document is temporarily held between the full-page belt 13 and the platen glass 1, and the signal is issued and the reverse rotation starts at point 71. )J can be changed. This prevents the trailing edge of the previous document from overlapping with the leading edge of the next document! 1- be done.

(16) Then, the next original that is reversely conveyed by the reverse drive of the full-surface belt 13 is also treated in the same way as the optical original from (8) to (8).
11) The second sheet pass 1 of the document illumination section
4 is conveyed and returned to the tray lO side, and the copying of the original is executed.

(17) By automatically repeating the steps (12) to (16) below, the documents O loaded on trays to and J2 are automatically fed one by one from tray to, one by one, and returned to the tray 10 side one by one,
In the meantime, in the document illumination unit, which is the second sheet processing station, the document image is exposed to the photoreceptor using the document moving reading method, and copies of each automatically fed document are sequentially and continuously performed, and the stacked document 0 After one cycle of feeding, one copy of the stacked original is obtained.

(18) The original circulation completion detection mechanism (Figs. 4 and 5)
When the document on the circulation hanging frame is fed and its rear end passes under the partition plate 36, the sensor 71 operates as described above and detects the end of lW4 feeding.

When the arm 35 and the partition plate 36 are rotated to the home position shown by the two-dot chain line in FIG. , it stops and waits at its home position.

(19) When the set number of copies is 1, the drive of the first motor M1 is stopped when the last fed document is returned to the tray IO and is completely discharged.

(20) When the set number of copies is multiple copies, when the last fed original is returned to the tray 10 side and has been ejected, the electromagnetic flange 49 is turned on by the command to start copying the second cloth (
Steps 2) to (I8) are repeated the number of set copying units and are automatically executed to copy a predetermined plurality of copies.

In this example apparatus, the moving optical system 3 is held at the home position and used as the optical system for illuminating the original in the original illuminating section and for forming an image on the photoreceptor. A dedicated fixed optical system may also be provided.

II. Second feeding mode This second feeding mode is a mode in which the RD Fd position is used like an ADF device.

(1) As in the case of I-(1) above, the original O is loaded on the tray 10 side. The second
After setting automatic document feed copying in feeding mode, the required number of copies of each document, copy magnification, and other required copying conditions, press the copy start button.

(2) Then, the steps I-(2) to I-(7) proceed. When the copy start button is pressed, the second motor M2 of the drive mechanism is brought into a continuous driving state, and the first and second originals are pressed by the transport rollers 28, 29, . The pair of rollers 33 and 34 in the sheet path 14 of i2 are also continuously maintained in a forward rotation drive state. However, in the step (7), the full-surface bell l-13 cannot be rotated in the reverse direction immediately after the forward rotation drive a is stopped when the rear edge of the document reaches the reference line position l. It is not switched and remains in the stopped rotation state. In other words, the original is held in a fixed state in which it is positioned at a predetermined position of 4<7 between the platen glass l, which is the first sheet processing station, and the full-surface bell 13.

(3) Then, when the forward rotation drive a of the full-surface belt 13 described in 1- is stopped, the forward movement of the moving optical system 3 on the side of the copying machine A is started, and as a result, the first sheet Position it at a predetermined position between the platen glass l, which is a processing station, and the entire belt 13, with the image surface facing downward.

1. The surface of the document in the first position is sequentially optically scanned from the left side to the right side, and an image is formed and exposed on the photoreceptor surface to perform copying. In addition, exposure of the original image onto the photoreceptor is performed at a portion of the platen glass, which is the first station, in a fixed-original light-incident method.

(4) Moving optical members 4 and 5 that have moved forward to a predetermined forward movement end point
-6 turns off the lamp 4 and turns into a backward motion to return to the initial home position and wait. However, when the set number of copies is multiple copies (multi-copy), the reciprocating operation of the movable optical system 3 is repeated the set number of copies to execute multi-copy of the original. phantom when moving, night light when returning).

(5) When the moving optical system 3 has completed the exposure process once (single copy) or required multiple times (multi-copy) for the documents set on the platen crows l and h, the entire surface of the belt 13 is removed by switching the clutch 50. is driven in reverse rotation. As a result, the exposed original on the platen glass l is reversely conveyed to the left of the platen glass l.

(6) The exposed original that has been transported in the reverse direction is then transferred to the original illumination section, which is the second sheet processing station, by the transport force of the transport rollers 28 and 29, and the pJSl in the forward rotation drive mode ffJ and the second original pressing. It passes through without being illuminated and enters the second sheet path 14, and then passes through the intermediate roller pair 33, 3.
4. Paperback @ l-ray 1 with the conveying force of the ejection roller pair 32
0 is kicked out with the image surface facing upward, tray IOJ, :,
It will be reloaded on top of the unexposed original.

(7) The next document from the tray 10 is fed onto the platen glass l in the same manner as in the steps 1-(+2) to (14) above, and is positioned and set at a predetermined position on the platen glass l. .

(8) Then, similarly to the optical original, the original is optically scanned by the moving optical system 3 and then ejected to the tray 10 side through the steps (3) to (6) above, and is subjected to copy processing.

(9) By automatically repeating steps (7) and (8) below, the stacked originals O on tray lO are automatically fed one by one in order from C, and are returned to trays 1o-F sequentially again, while the first sheet In a portion of the platen glass 1 serving as a processing station, exposure of the original image to the photoreceptor is performed once or a predetermined number of times by the original fixed exposure method, and single copy or multi-copy is executed for each original.

(10) In the case of multi-copying, each original is repeatedly exposed to light on the platen glass 1 times for the predetermined number of copies N - 1 times, and the originals are returned to the reloaded state after being cycled through the platen glass 1 times. By feeding this IW4 only once in the first feeding mode, the remaining one sheet of each original is copied one by one, thereby further shortening the overall copying processing time and performing quick copying work. I can do it. RDF in this case
Apparatus Device Example 2 Switching from the feeding mode to the first feeding mode may be performed manually or may be automated.

■ In the case of manual manual setting of originals When copying by manual manual setting of originals without using an RDF device, open and raise the RDF @ equipment B from the platen clast 17- of the copier main unit A and place it on the platen glass L. Position and set the original in the specified position with the image side facing up.
When the RDF device is placed on top of it and closed, the entire surface belt 13 portion covers the set document, and the document is covered with a full surface belt) 1
3 and the platen crow 1 are pressed into the sandwich inch. Next, when you press the copy start button, the moving optical system 3
moves back and forth to perform optical scanning of the document surface, and copy processing is executed.

FIG. 6 is a diagram of an electric circuit for controlling the operation of the RDF device shown in FIG. 2, φ, and 3 as an example.

Ql is a control section of the main body of the copying machine that includes a well-known microcomputer. Q2 is a control unit consisting of a microcomputer for controlling the RDF device, and ROM@I
This is a well-known LSI including tAM-ALV/I10 latch and the like.

IRPT is the interrupt terminal r- of the microcomputer Q2.
1A I o -A I 3. BI o~BI4 are manual ports, AOo”AO3, BOo-BO3, C0o
-CO3 is the output port. CK is a clock pulse detection sensor that detects a slit in a clock plate (not shown) that rotates in synchronization with the first motor Ml. For example, a photo interrupter is used to detect the slit between each original sensor 5l-34 in the original transport path. This is used to monitor time and detect jams.

DSW is a switch that detects the opening and closing of the RDF device.
This will help determine whether the RDF device is capable of being used.

Q3A, Q3B, Q3C, and Q3D are drivers composed of transistors and the like.

The 5TART signal manually input to B I 3 is a signal output from the copying machine main body in synchronization with the copy button on the copying machine main body. ADY Shin-)
This is a signal that is output from Q2 and is activated only when the STA RT signal is present.The operation of the RDF device is started by the STA RT signal.

The signal manually inputted to the manual boat BI4 is a mode 1 signal which determines one of the two feeding modes of the RDF.

The 0END signal output from output capo-1-B Oo is
This signal is output when the one-cycle sensor 71 detects the signal, and the copying machine main body control 1lQl can control the number of copies f:8.

R E' A D output by BOj
The Y signal is a signal that informs the copying machine that the RDF device is in operation, and is output when the switch DSW is closed, a document is loaded on the RDF device, and the RDF device is not in the JAM state.

Output Capo) Co, 5IZEI- output from ~C03
The signal 3IZE4 is a signal that informs the copying machine main body of the size of the document loaded on the RDF device (A 3 llA4 ΦB4, etc.), and this signal enables the copying machine main body to selectively replenish copy paper. It is appropriate to detect f-s by measuring the document passage time of the document sensor S1 or S2 using a clock pulse CK. The operation panel PANEL is an operation section that includes the npF3 selection button, copy setting number of copies, copy button 1 magnification setting button, etc.
The copying machine A-RDF device B is controlled manually by the section Ql.

Figure 7 and Figure 8 are schematic flowcharts showing the operation control program of the RDF device.

The operation of the RDF device is started by the STA RT signal sent from the main body of the copying machine. First, when the feeding mode is determined and it is the first feeding mode, the first motor M
1. By driving the clutch 49 and rotating the clutch 50 in the forward direction, the original is separated from the lower side and fed and conveyed.

Next, when the 151 sensor detects the rear wheel of the document,
49 is set to 0FFI, and the driving of the minute # section is stopped.

During this period, the original is conveyed between the entire surface belt and the platen, and after the trailing edge of the original is detected by the original sensor S2, the clutch 5o is set to the stop position after N clock pulses have elapsed, and the conveyance of the entire surface belt is stopped seven times. The original with that surface light is the original sensor s.
4, the clutch 5o is switched to the reverse direction and the document on the platen J2 is reversely fed. If the previous document is still detected by the document sensor S4, the clutch 50 is switched to reverse rotation after passing the sensor s4.

Next, after the sensor S3 is detected and after M clock pulses have elapsed, the second motor M2 is registered with the ONL copying machine main body.

After this, when the document is detected by sensor S4, S
The control program branches due to the TA 11 T signal.

Listen, when the STA R'rT signal is ON, if the ml for all manuscripts has not been completed, A! J,m
11+r of l returns to 1, and the same sequence control is repeated.

- When the power STA R'r Shinso is in the OFF state, copying of all the originals is completed, and after the last original is outputted (11), the return RDF operation is completed.

Next, if it is the second feeding mode, the first mork M1
, by turning the second motor M2 on the drive clutch 49 and turning the clutch 50 to 1, the original (#l) is conveyed by the amount on the do side.Next, when the trailing edge of the original is detected by the IJSl sensor, the clutch 49 is turned on. The driving of the 0FFL separating unit is stopped. During this time, the original is conveyed between the full-surface belt and the platen, and after the trailing edge of the original is detected by the original sensor S2, after N clock pulses have elapsed, the clutch 50 is set to the stop position and the full-surface belt is conveyed. The original is placed on the platen, and when a predetermined number of sheets have been slowly copied by the mirror scan of the copying machine main body, the clutch 50 is reversed.

In the apparatus of the above-L embodiment, the document illumination unit, which is the second sheet processing station, is placed on the right side of the document table L, and in the case of the 1.1fi feed mode, the document is loaded (L/-f). l
The original transported one sheet from O-h to the il sheet)・
Pass 12→Full surface bell) Plateau by positive rotation a of 13/
The document is conveyed in the direction of the right side of the glass i -L → - by the path of the recording source f^ viewing area, and the document is sequentially moved and read with one copy of the document illumination section. In the case of the second feeding mode, the moving optical system temporarily stops the 13 rotations a of the full-surface belt 13 on the graphene glass l. It is also possible to configure so that after executing the document scanning in step 3, the entire surface bell]-13 is again moved two times (a) to return the document from the 14th side of the platen crow 1 to the document stacking tray 107.

1: The RDF apparatus according to the invention has two document exposure processing sections, the first and second processing stations, and one of the exposure processing sections feeds the document using the document movement exposure method. This makes it possible to selectively perform exposure processing in two modes: 1 feeding mode, and 5f and 2M feeding modes, which perform manual exposure processing using the C exposure method. Since original 1% movement reading exposure and passing paper feeding can be used together, it is possible to exchange documents at high speed. Furthermore, despite the high speed, the conveyance speed of the self-cutting blade is kept relatively low, which has the effect of preventing document damage. In addition, the platen is configured so that four J1x documents can be placed on the platen, so it can be used when you want to make multiple copies of one original at a time, or when you want to make many copies from a small number of originals. It's also effective.

Although the RDF fishing equipment used in the U4-complex machine has been described as an example, the present invention is effective as a rational structure for other circulating sheet feeding devices.

[Brief explanation of drawings]

Figure 1 is a schematic diagram of the J11 configuration of a conventional general RDF device.
Figure 2 is a block diagram of the RDF device constructed according to the present invention, Figure 3 is a diagram of the drive mechanism, Figure 4 is an enlarged view of the end-of-circulation detection mechanism, and Figure 5 is an enlarged view of the end-of-circulation detection mechanism. Figure and same side view,
FIG. 6 shows an example of a control circuit for operating the apparatus in the first feeding mode F, and FIGS. 7 and 8 show flowchart 1. A is a duplicating machine, B is an RDF device, j is a platen glass, 3 is a moving optical system, IO is a document loading) L-I, 0 is a loading document, 11 is a sea 1-1 autumn equinox floor 1 general transport 5aaSb, 5l-84 are )/-tosensors. Figure 6 Figure 5

Claims (1)

[Claims] (1) Sort stacking section and 1, jp, 'y -i Separate and feed the sheets set in the stacking section one by one from the bottom sheet 1-1 sheet separation conveyance [one step, ! 1.1! II ``'+'' The first step to process yellow sheets
Sheet processing station of 111J, and the sheet f transported from the transporting means for one sheet of 111J is transported to the processing 7 station>i:' 4 (transferred to the above 2+'S l sheet) a sheet transporting means for transporting the sheet transported to its predetermined position;
The sort that has been transferred through the first No. 1 processing station is transferred to the sheet transfer form! A second sheet processing station that processes sheets at the same location ν and 1,) 4) transports and moves the second sorting processing station. and a sheet return conveyance stage that continues to pick up the first sheet and returns it to the second sheet stacking section. Circulating sheet feeding device consisting of.