JPS5978026A - Paper feed device - Google Patents

Abstract

PURPOSE:To make it possible to continuously copy a plurality of papers, by feeding out one of papers on the side of a large capacity paper store part, and making it standby when no paper is present in a paper transferring part or when a standby paper on the side of an imaging device is fed by a paper feeding means. CONSTITUTION:When a paper standing by between a main machine side feed roller and a second conveyor roller 68a is delivered into an imaging section due to rotation of a feed roller and therefore, the trailing end of the paper has passed the position of a paper sensor S5, a conveyor motor 24 and an electromagnetic device 52 are driven so that a feed paper roller 40 rotates by means of an one-rotation clutch 34 to feed out one of papers on a bed 5, which is therefore received by a nip section between a conveyor roller 57 and a driven roller 59. Then, when the trailing end of the paper has passed the position of a paper sensor S6, a clutch 50 is turned on due to the drive of the electromagnetic device 52 to rotate the rollers 57, 68a, and therefore, the next paper is conveyed onto a paper guide plate 73, and is stopped to stand by after having passed the position of the paper sensor S6.

Description

[Detailed description of the invention] The present invention relates to paper supply equipment for image forming apparatuses and the like.

For example, an image forming apparatus such as an electronic or electrostatic photocopier or simple printing machine generally uses a paper cassette insertion method for feeding paper. This is done by inserting and setting the Paper Cellar I, which contains cut-sheet paper in advance, into the cassette slot of the machine, and then feeding the paper in the set one by one into the machine by the action of the paper feeding means on the machine side. The paper is pulled in and fed to the image forming section, and by preparing several paper cassettes each containing paper of different sizes and paper qualities, paper can be easily replaced in the machine by inserting and removing the cassettes. Alternatively, if the machine is equipped with multiple cassette inserts 1 and the cassettes I are inserted into them, it is convenient because it allows you to change the paper for this machine with a single operation of the translation selection button. It is.

However, the maximum paper storage capacity of the paper cassette is about 250 or 500 sheets, so when copying a large number of sheets, such as 1,000 or 2,000 sheets, in a row, the paper cassette has a maximum paper storage capacity of about 250 or 500 sheets. It is cumbersome to have to replenish paper into the cassette I, and copying, etc., must be interrupted each time, making it impossible to take full advantage of the machine's high-speed performance.

Therefore, for example, 200
Some machines are equipped with a multi-sheet tray (or tray) mechanism that can store and feed a large amount of paper, such as 0 sheets, at one time, but this paper mechanism is built into the model (=J type). This is a dedicated mechanism for the image forming apparatus.

In view of the above, the present invention has been developed for a general paper cassette insertion type image forming apparatus that does not have a built-in multi-sheet deck mechanism. 1000 sheets-2 by simply physically fitting and connecting them to the insertion slot in the same way as a cassette.
The highly reliable large-capacity automatic general-purpose unit FI+4 can be used in combination with various paper cassette-inserted image forming apparatuses, making it possible to perform continuous copying of large numbers of sheets, such as 000 sheets, without interruption until the end. The purpose is to provide a paper feeding device.

Hereinafter, a detailed description will be given of one embodiment of the apparatus shown in the drawings.

(1) Rough configuration of the apparatus of this example and connections to the image forming apparatus (mainly the 1st to 31st lines) (hereinafter abbreviated as this unit).
-+7;l cutaway side view in a state where the

The paper feed system in this example is divided into 1 space, for example 2
Approximately 0,000 sheets of paper for many years ■J
A y1 raised paper storage table mechanism that can accommodate 11 sheets, and a paper feeder that feeds 4e one sheet at a time from 41- to 41- for loading.
A large-yield quick paper storage unit 1 consisting of 5 and 1, which protrudes forward from the upper front surface of the storage unit 1 and is inserted into the paper cassette on the B side of the machine + 1 sheet of paper to be placed in JI O1. It consists of a destination transport/141 machine section 2, and (1) a control circuit section.

C is a pedestal on which the machine B is mounted, and D is a pedestal for connecting and holding the paper feeder A to the machine B. As shown in the exploded perspective view in Figure 2, this pedestal is connected to the left and right 6 (+' + A vertical spine frame, and rearward protruding horizontal lugs 112 formed on the left and right sides of the lower horizontal frame side.
A pair of left and right horizontal rails 113, 113 connected by screwing the tip ends to 112, and a common pedestal J for both rails fixed to the lower surface of the rear end of both rails with welding noise-proofing etc.
, 14, the horizontal adjuster type floor contact seats 115, 115 provided on the left and right parts of the lower surface of the base legs, and the paper feed device N provided for left and right positioning, provided approximately in the center of the left and right vertical frame sides 110, 110 of the back +15, respectively. It consists of rear protruding pins 116, 116.

Each of the pair of left and right horizontal rails 113 is an upward channel rail having a substantially U-shaped cross section, and its length is longer than the longitudinal dimension of the bottom plate of the large-capacity paper storage section 1 of the paper feeder A. 117Φ
Reference numeral 117 denotes a rail groove cover plate 118 which is formed by bending approximately the front half of one side of the "left and right" side of the two-directional channel rail at a substantially right angle toward the other side.
・118 is a protrusion formed approximately at the center of the bottom plate surface of each rail, and 119-119 is a bent strut at the rear end of the rail.
It is j.

Therefore, the above h seat I] is the left and right vertical 43L side 1 of the vertical back frame.
The four outward facing lugs 120 formed at the second and third ends of 10 are connected to the outer plate stoppers 121 on the cassette insertion side of the machine B, and the outer plate stoppers on that side. By using i22 and 122 to align with each outer panel, it is firmly attached and fixed to machine B and pedicle C. Floor contact seat 11.5 of pedestal leg 114
- A few words for the machine B and the pedicle C in the combination seat are brought into contact with the floor surface by adjusting the torsion appropriately before or after.

Four rotating rollers 123 that fit into the grooves of the left and right channel rails 113 are arranged near the four corners on the lower surface of the bottom plate of the large-capacity paper storage section 1 of the paper feeder A. Near the two rollers on the right side, there is a downward approximately U-shaped positioning member that fits into the -1 facing side of the right side channel rail 113 on the side where the rail groove cover plate 11°7 is not formed, as shown in the third figure. Members 124 (made of synthetic resin, for example) are provided.

To attach the paper feeder A to the machine B, insert the paper feeder #A into the grooves of the pair of left and right horizontal channel rails 113 on the pedestal that is securely attached to the machine B and the base C.
Of the four rollers 123 on the lower surface of the bottom plate, first insert the front left and right rollers, and then insert the downward U-shaped member 124 near the right roller.
facing the rail on that side and fitting it on the side of the paper feeder.
Push the entire iJA forward, make the front left and right rollers ride over the protrusion 118 on the rail bottom plate, and push it further forward. Next, fit the rear left and right rollers into the left and right rail grooves, respectively, and insert the U-shaped member 1.2 near the right roller.
4 to the upwardly facing side of the rail on that side, the device A is further pushed forward, and the rear right and left rollers are also caused to ride over the protrusion 118 of the rail.

As the paper feeder A is pushed forward, the special unit 2 for transporting one sheet of paper that protrudes forward from the paper feeder A is inserted into the cassette slot 101 of the machine B. When the rear left and right rollers 123 pass over the protrusion 118 of the rail on the pedestal, the front plate of the dog-shaped paper storage section l of the paper feeder A comes into contact with the upper horizontal frame side 111 of the vertical back frame of the pedestal. The device i! l:
At the time when further forward movement of A is prevented, the rear projecting pin 116 for positioning the paper feeder left and right on the pedestal side has fully entered the corresponding pin entry hole 116a on the paper feeder A side, and the feed n (Transportation of one sheet of paper by device A - The special equipment section 2 reaches the proper position in the main RB's feeder insertion slot 101.)
When the cassette is inserted, the cassette is inserted into the mated state. Also, the rear right and left rollers 1.23 of the mounting RA are stopped by the protrusions 118 of the rails and are stably held at the final forward position. By mounting the paper feeding device A on the base rail 113 and sliding it forward, the connection of the device to the machine B is completed.

To position the paper feed device for this machine B, first, attach the pedestal to this machine B (the outer panels on the UB side are accurately done using screws 121-121, and then move the device 11A to its final forward position. This is done by the device A coming into contact with the horizontal frame side 11 on the upper side of the vertical back frame of the pedestal, and the positioning of the device A in the left and right direction (direction perpendicular to the rail) is done by the left and right pins 116.1 on the pedestal side.
16 and the pin entry hole 116a on the device A side, and the rail 113 and the downward U-shaped members 124 and 12 on the device A side.
This is done with high precision by engaging with 4. Note that the pin 116 may be provided only at one location on either the left or right side. In the height direction, several screws 121 and 121 for the machine B on the pedestal are used for positioning and rail surface. In this way, the paper feeding device A is mounted on the pedestal rail 113 and slid forward enough to open the cassette insertion slot 101 of the device A.
1 incoming connection to is made accurately and without any hindrance.

Furthermore, after the paper feeder A is connected to this machine, all four rollers 123 are located in the portion of the rail 113 where the cover plate 117 is present, and are prevented from floating from the rail to the apparatus.

When clearing a jam in the wood JIS B cassette insertion slot 101, remove the paper feeder A connected to the machine B by moving the rear left and right rollers 123 over the rail protrusion 118. Slide the rail 90 backwards until it abuts against the stopper piece 119 at the rear end of the rail. In this way, it is possible to easily carry out the rejar 11 process in which the single sheet conveyance/special unit 2 of the apparatus A is removed from the cassette insertion D 101 of the machine B. After clearing the jam, if device A is pushed forward along the rail, device Δ will be connected to machine B again.

In addition, this machine B in the illustrated example has a paper strength center insertion point of "nid 2 stages 1".
02/101 (In this example, the special unit 2 for conveying one sheet of paper from the paper feeder A is fitted and connected to the lower cassette insertion opening 1o1. If necessary, you can leave the upper cassette E inserted and use the paper selection button on the machine B side to switch the paper feed to the upper cassette side and feed the paper in the set into the machine B. .

Instead of being hooked to the pedisc C using the screws 122 at the lower end of the pedestal vertical frame, a hook may be formed and the hook may be hooked to the cross beam on the back of the pedicle bottom plate.

(2) A descending type paper storage mechanism 3ae3be3cs3d (Figs. 4 to 6) has a bottom plate.
A horizontally and vertically long chassis consisting of four panels: front panel, right panel, and left panel, with the rear and top surfaces open - 14φ4
(Fig. 7-9) shows channel rails having a substantially U-shaped cross section and arranged vertically on the front sides of the inner surfaces of the right side panel 3C and the left side panel 3d of the chassis, respectively, and 5 is a paper storage stand; A number of plates 6, 6 are fixed to each side of the distal end side in the vertical direction, and a pair of upper and lower rollers 7, 7 are pivoted to the outside of each plate 6. Then, the left and right pairs of rollers are fitted and engaged in the grooves of the left and right vertical channel rails 4. Therefore, the paper storage table 5 can freely move up and down along the rails 4.

Reference numeral 8 denotes a motor for driving up and down the paper storage table (hereinafter abbreviated as a lifter motor), which is held in the inner lower part of the right side panel 3C of the chassis.
0), the final shaft 10 of the reduction gear box is driven +11+ to protrude from the inside to the outside of the chassis right side plate 3C, and the sprocket 11 is fixed to the protruding end.

12 and 13 (Fig. 6-8) are the left and right chassis side plates 3d.
・A rotating shaft of two parallel trees arranged with bearings between the lower corners and the upper corner of the front side of 3c, respectively, and the rotating shaft 1 of the two trees
2 and 13 have sprockets 14-14 on both ends respectively.
．． 15ψ15 is fixed and arranged. Sprocket 1
5 and 15 may be free to rotate with respect to the shaft 13. In addition, the right end of the lower rotating shaft 12 is extended to the chassis right side plate 3C.
A sprocket 7 is attached to the protruding shaft via a one-way clutch (spring flange) 16.

18 is the sprocket of the drive shaft 10, a chain is suspended between 1 and 11 and the sprocket 17 at the outwardly protruding end of the lower rotation shaft J2, and 19 and 19 are the parallel rotation shafts 13 of the two upper and lower wheels.
・12 left side sprocket 1. ]・A pair of left and right vertical chains suspended between 15φ14 and between the right sprocket I・15-14, and this left and right pair of vertical chains 19・
A part 19a (Figs. 6 and 8) of 19 is extended from the front end of the left and right side plates of the paper storage table 5, and is inserted through the left and right longitudinal slit holes 3e and 3e formed on the chassis front plate 3b to the front of the chassis. The arm plate 5a exposed to the outside of the face plate 3b is tightly connected to the arm plate 5a.

When the lifter motor 8 is driven in normal rotation a (Fig. 4), its rotational force is transmitted to the lower rotating shaft 12 via the sprocket 11 → churn 18 → sprocket 17 → one-way crank 16, and this number From this, the left and right vertical chains 19-19 rotate the platform 5 in the negative direction, causing the platform 5 to move along the rail 4*4.

On the other hand, if the drive is reversed, the rotation direction of the sprocket 17 will be the same as the direction in which the one-way crank 16 will idle.
Although no active reversing force due to the reversing drive of the motor 8 acts on the motor 8, the left and right vertical chains 19 and
19, Sprocket 1, 1, 15, 14. 15-14, the lower rotating shaft 13φ12 rotates in the opposite direction, and the platform 5 moves against the rail 4.
71) and moves downward.

20 (Fig. 10) A gear disc for the motor brake fixed to the rear end of the rotating shaft of the beam lid morph, 21 is always biased by a spring in the engaging direction with respect to the gear disc, and is connected to the electromagnetic suction device 22. This is a pawl plate that escapes from the gear cutter circle ff1I20 by a single electric current. Therefore, the electromagnetic suction device 22 is energized from a moment before the start of energization of the lifter motor 8 to drive the motor forward or reverse to a moment a little after the energization is cut off. The pawl plate 21 is held in the escape position, allowing the motor 8 to stop and reverse rotation. On the other hand, outside the period indicated by "-", the engagement of the pawl plate 21 with the south cutting disc 20 prevents the motor shaft from moving idly. This allows the platform 5 to be placed in the lifting position midway between the vertical rails 4 and 4.
This prevents the rotating shaft of the motor 8 from sliding down by itself due to the self-gravity of the table and the sheets P loaded thereon while idling, and the table 5 is stably held in the lifted position.

23 (Figures 7 @ 11 and 12) is a thousand-faced paper detection swing lever that is rotatably supported on a bearing inside the upper corner of the front side of the chassis right side plate 3C. A first protrusion 23a facing downward provided at the tip of the protrusion 23a, and a second protrusion 23b also directed downward but having a shorter protrusion length than the first protrusion 23a.
and a third upward protrusion 23c provided in the middle of the lever 23.
and an upward protrusion 23d provided at the base of the lever.

The first downward protrusion 23a comes into contact with the upper surface of the uppermost sheet of the stacked sheets P on the table 5. When the last sheet of paper on the table 5''2 is fed and the first protrusion 23a falls into the through hole 5b on the side of the table 5, the second protrusion 23b hits the upper surface of the table 5 on the way, and the lever 23 moves further. It acts to prevent the tilting and rotation of the. Third
The upward protrusion 23C faces the paper upper surface excess detection sensor S2 disposed on the inner surface of the upper side of the chassis front surface 3b. The fourth -1-direction protrusion 23d is the chassis-right side plate 3
A photoelectric sheet 1-side level sensor S consisting of a light source and a light receiving element disposed inside the lever 23 at the negative position of the base of the lever 23.
It is located in the optical path section of No. 1.

Load the storage paper P on the table 5 with the face facing the specified position.
When the lever 23 faces the paper and is within the range PH to PL (FIG. 12), the lever 23 is held in a substantially horizontal position within a certain tilt angle range α by the contact of the first downward protrusion 23a with the upper surface of the paper. and the fourth "-oriented protrusion 23d is the photoelectric sensor S1
The light path is blocked. As a result, it is detected that the upper surface of the stacked paper P is within the predetermined position level range PH-PL.

When the stacked sheets P on the table 5 are sequentially fed out one by one from the top by the operation of a paper feeding mechanism to be described later, the top surface position of the stacked sheets gradually lowers. Following this, the lever 23 sequentially tilts and rotates. Then, when the top surface position of the paper reaches the lower limit level PL, the sensor S which was blocked by the fourth protrusion 23d of the lever 23
It is detected that the optical path No. 1 is completely opened and the position of the stacked paper surface has decreased to the lower limit level PL.

Based on this signal, the aforementioned electromagnetic suction device 22 of the lift motor 8 is energized via the control circuit, the pawl plate 21 escapes from the gear disc 20 of the lift motor 8, and the lift motor 8 is then rotated in the forward direction a. When electricity is applied, the table 5 is moved with its upper load, and the entire stack of sheets P is lifted and moved. This hold-
The upper surface of the stacked paper P is moved to -A by the 1-edge movement. Along with this, the lever 23 in the inclined position returns and rotates, and the sensor S
1 optical path is blocked. After a predetermined period of time has elapsed since this optical path cutoff signal, the power to the lifter motor 8 is cut off via the control circuit, and then the power to the electromagnetic suction device 20 is cut off.

In this way, each time, for example, about 20 to 30 sheets of the stacked paper P on the table 5 are consumed, the shoulder movement of the table 5 as described above is intermittently and automatically performed, so that the upper surface position level of the stacked paper P is always maintained at a predetermined level. is maintained at the permissible range level PH to PL.

As consumption of the stacked paper P progresses, the table 5 also repeats the intermittent upward R, and at some point the top surface of the table 5 itself or the top surface of the stacked paper falls within the level range PH-PL, and the last sheet on the table 5'- When the paper is fed, the first downward protrusion 23a of the lever 23
falls into the through hole 5b formed in the base 5, and the lever 23 is tilted greatly until the second downward protrusion 23b hits and is received by the one 1z surface of the base 5, and the lever 23 rotates αLLL, and the fourth downward protrusion of the lever 23d is a position completely removed from the optical path of the sensor Sl. The signal from the sensor Sl at this time and the upper limit position sensor S of the table 5, which will be described later, are emitted before that.
3, it is detected that there is no paper on the table 5-.

S3 and S4 (FIG. 8) are the right slit holes 3 of the longitudinal slit holes 3e and 3e on the outer surface side of the chassis front plate 3b.
These are the hi movement upper limit position sensor (for example, a microswitch) and the lower movement lower limit position sensor (the same) of the table 5, which are disposed at the upper and lower end positions of the table 5.

As the table 5 is moved up A intermittently and sequentially as described above, when the two sides of the table 5 reach the lower limit level PL of the surface level range, the A lowering chain of the table 5 is reached. The protrusion 5C formed on the locking connecting arm 5a is the upper limit position sensor S3.
reaching the upper limit position of the platform 5 is detected, and the signal is input to the control circuit. At this point, there is still some paper P remaining on the table 5-1-, and when all the remaining paper is fed, a paper out signal is generated by the sensor S1 based on the large inclination αLL of the lever 23 as described in "2". is input to the control circuit.

The lower limit position sensor S4 is turned on by the protrusion 5C when the platform 5 moves downward and reaches the lower limit position, detects that the platform 5 has reached the lower limit position, and inputs the signal to the control circuit.

The "two-sided" excessively bright paper detection sensor S2 will be described later.

(3) The single sheet feeding mechanism 24 (Figures 5 and 6) is a 10 sheet feeding motor (hereinafter abbreviated as paper feeding motor) that is held at the bottom of the inside of the left side panel 3d of the chassis. The rotation of the motor shaft is reduced by a reduction gear box, and the final shaft 26 of the reduction gear box is used as a drive shaft to protrude from the inside to the outside of the chassis left side plate 3d, and the first timing pulley 27 is fixed to the protruding end. It is.

28 (&', Figures 5 and 13) is a pin shaft implanted on the outer surface of the left side panel 3d of the chassis, and the second timing pulley 29, first gear 30, and encoder gear cutting disc 31 are attached to this pin shaft. A concentrically integrally connected three members are supported to rotate freely, and the first timing pulley 27 and &! S
A timing belt 32 is suspended between two timing pulleys 29.

Therefore, when the paper feed motor 24 is rotationally driven, the three-part pulley 29, first gear 30, and gear cutting circle a31 are rotationally driven.

33 (Figs. 6-7, Figures 11 and 13) is a paper feed spindle disposed on the top of the left and right chassis side plates 3d and 3c so as to be rotatably supported between both 3d◆3c, and the left end of the spindle is is extended to protrude to the outside of the chassis left side plate 3d, and a one-turn clutch (spring clutch) 34 and a second gear 35 are attached to one part of this protrusion. The second gear 35 meshes with the first gear 30 described above.

The one-turn clutch 34 is normally in a clutch-off state as the claw arm 37 of the first electromagnetic suction device 36 engages the protrusion 34a of the outer ring, so even if the first gear 30 rotates, the second gear 35 simply rotates idly on the shaft 33, and the shaft 33 is not driven to rotate.

When the first electromagnetic suction device R36 is momentarily energized and the outer ring is unlatched by the claw art 37, the second gear 35 and the shaft 33k are coupled together by the clutch-on, and the shaft 3
3 rotational drive is performed.

When the shaft 33 rotates approximately one turn and the protrusion 34a of the outer ring is once again latched onto the claw arm 37, the taratch is turned off and the second
The gear 35 becomes free to rotate on the shaft 33, and the rotation of the shaft 33 is stopped. That is, the paper feeding support shaft 33 is driven to rotate intermittently one rotation at a time when the first electromagnetic device 36 is momentarily energized.

38/38 (Fig. 7) has two locations on the left and right of the paper feed support shaft 33 to restrict the movement of the shaft 33 in the longitudinal direction, supports the base freely in rotation, and has a generally downward cross section with the tip facing forward. The letter-shaped paper feed roller support arm 39 is a paper feed roller shaft rotatably supported at the tip of the left and right pair of arms, 40
40a is a weight roller that is also fixed to the shaft 39, and 42a is in the channel at the base of one of the paper feeding roller support arms 38. 42b is a timing pulley fixed to the paper feed shaft 33 part of the arm, 42b is a timing pulley fixed to the paper feed roller shaft 39 part in the channel on the distal end side of the arm, 42c is a timing pulley fixed to the paper feed shaft 39 part of the arm, and 42c is a timing pulley fixed to the paper feed shaft 39 part of the arm.
This is the timing belt hanging between 2a and 4' and 2b.

Reference numerals 45 and 45 designate single-sheet separating claws that touch the right and left corners of the leading edge side of the top surface of the uppermost sheet of the stacked sheets P lifted and supported by the table 5. The left and right separation claws 45 are formed at the front corners fifl of a fixed reference side plate 88 and a movable side plate 86 for regulating the side surfaces of stacked sheets, which will be described later.

As a result, as the paper feed support shaft 33 is driven one rotation,
33 for one time, the pulley 42a → timing belt 42c → pulley 42b = phase paper roller shaft 39 → the paper feed roller 40 is rotationally driven in the paper feeding direction via the one-way clutch 41 to feed the topmost paper of the stacked paper P. A feeding force is applied to the sheet, and only one sheet of paper is sent forward over the separating claws 45, 45.

The weight roller 40a functions to constantly rub the paper feed roller 40 against the upper surface of the stacked sheets with a moderate force.

46 (Figs. 5 and 13) is a third gear (idler) which is held by a freely rotatable pin shaft mounted on the outer surface of the chassis left side plate 3d. be. 4
7.50 is the chassis left side plate 3d and the side plate 48 (7th
・The 4th gear and the clutch 1. are attached to the shaft 49 which has a free-rotatable ball bearing (Fig. 8). The clutch 51 is an outer 1-piece of the clutch 50 with fine teeth formed on the outer circumferential surface. The fourth gear 47 meshes with the third gear 46. 52at is a second electromagnetic suction device that swings a claw arm that is hooked on and removed from the gear cutting rear outer ring 51. When the second electromagnetic suction device 52 is not energized, the pawl arm 52a is connected to the gear cutting rear outer ring 51 of the clutch 50.
Therefore, in this four-wheel position, the clutch 50 is in the on state and the fourth gear 47 is connected to the shaft 49. Conversely, when energizing, Mr. 1 Mr. J arm 5
2a gear cutter rear outer ring latching (Koyori crank 50
4th gear 471j is held off and 653 is held in a free rotation state J7g J with respect to 1149.
The fifth gear 54 is connected to the shaft 49 shown in FIG.
The sixth gear (idler) meshed with the gear, 55, is the ff1
This is the conveyor roller gear (seventh gear) that meshes with the sixth gear.

56 (Fig. 13 of the 647th meeting) is the first conveying roller shaft, which is located between the bearing plates 3de3c formed by extending the upper corners of the front sides of the left and right side plates 3d and 3C of the chassis forward, respectively. The conveyor roller shaft gear 55, which is the seventh gear, is fixed to the left end of the shaft 56, which is supported by a bearing so as to be freely rotatable.

Reference numeral 57 designates conveyance rollers 281 which are respectively attached to the shaft 56 via one-way clutches 58, and 59 (Figs. 6 and 14) is a driven presser roller which is brought into contact with the upper surface of each conveyance roller 57 with a single pressing force. The shaft 60 of the driven presser roller is located between the paper feed roller 40 and the 1st feed roller 57.
For the lower pair (upper guide plate 61 of Kai F plate 61Φ62
- is supported between a pair of left and right projections 63, 63 formed on the surface, and the driven presser roller 59 is rotatably mounted on this shaft 60. Each driven presser roller 59 is always in contact with the upper surface of each lower transport roller 57 through a notch formed in the side kite plate 6e.

Therefore, while the paper feed motor 24 is being rotated, the crank 50 is on for the non-energized 111 pieces of the second electromagnetic suction device 52, so the first gear 30 is not turned on as the motor 24 rotates. Rotation is 3rd gear 46 → 4th gear 47 → clutch 50 → shaft 4
9→fifth gear 53→sixth gear 54→seventh gear 55 to the eleventh general jX roller 56,
The Wi feed roller 57 is rotationally driven in the paper feeding direction. Further, as the roller 57 rotates, the driven presser roller 59 also rotates.

- When the electromagnetic suction device 52 of the force cylinder 2 is turned on, the crank 50
is off, the fourth gear 47 idles on the shaft 49-l:: and the shaft 49 is not driven to rotate. That is, the 11B9 feed roller 57 is not rotated.

(4) The single-sheet conveyance/special unit 2 65 has its base connected to the first conveyance roller shaft 56, and is arranged so as to protrude forward from the upper part of the chassis front plate 3b of the large-capacity paper storage section 1. A flat box-shaped conveyor 1 (substrate).

The width and σ thickness of this flat box-shaped base are approximately the same as the width of the thin paper cassette for accommodating 250 sheets and the I7 method, and the goodness = 1 method is the cassette on the B side of the machine! l To Ii, the 1-1 river stone (slightly longer than the J method and has a flat box shape) is moved about 10 degrees downward from a substantially horizontal position centering on the first conveyance roller Tsukuda 156. It is free to swing within the range of the bird's posture (Fig. 4).

Therefore, one sheet of paper mainly composed of the flat box-shaped base 65 is placed in the cassette IΦ slot on the side of the machine B to which the paper feeder A is connected, or in the cassette slot 1 in the case of a thin paper cassette for accommodating 250 sheets. At the same time as the addressee 1 general delivery dispute special equipment section 2 inserts the power cent, it is fitted in a matching manner. Further, the base body 65 is connected to the shaft 56 as described above.
Since there is a degree of freedom for swinging around , even if there is a slight deviation in the approach angle for one paper cassette insertion in the conveyor unit 2 for one sheet, the deviation will naturally be corrected as the paper advances. Corrected and finally conveyed to one sheet of paper and waiting Rf? l+
2 is a cassette) ・Insert it smoothly into the insertion 1 in the normal position 11 stomach and posture.

66φ66 (Figures 4 and 5) is used when the cassette slot lO1 on the machine B side to which the paper feeder A is connected is for a thick paper cassette for storing 500 sheets (this example is used). In the cassette insertion slot lot, there is a special transport unit 2 for transporting one sheet of the above-mentioned thin paper.
These are removable, downwardly inclined cam-shaped spacer plates that are screwed onto the outer surfaces of the left and right side plates 65a and 65b of the flat box-shaped base 65 near the tips, respectively, and used several times in order to accommodate the above-mentioned flat box-shaped base body 65.

That is, in this case, when the paper feeder A is pushed forward along the rails 113 to connect it to the machine B, the left and right sides of the lower edge of the cassette insertion slot 101 are shaped like two left and right wound surface cams. The front body surfaces 66a, 66a of the spacer plates abut (FIG. 15). When the sheet feeder fltA is continued to be pushed even after the contact, the slopes 66a, 66a slide on the lower edge of the cassette slot, and an upward rotational force about the shaft 56 is applied to the flat box-shaped base 65. act. As a result, due to the lifting action of the inclined cam plate-shaped spacer plates 66, 66 as the sheet feeding device A is pushed, the base body 65 naturally changes its posture in a substantially horizontal direction, and the tip portion moves inward of the cassette slot 101. It enters smoothly, and then the lower end of the spacer plate 6 row 66 transfers to the bottom plate surface of the cassette insertion opening 101, and the base body 65 is lifted to a substantially horizontal position and enters.

Therefore, whether the cassette slot lO1 on the B side of the machine is for a thin paper cassette that accommodates 250 sheets or a thick paper cassette that accommodates 500 sheets, the paper 1 of paper feeder A is ultimately used. The sheet conveyance ψ special unit 2 is inserted into the cassette I/insertion slot on the B side of the machine, and the upper surface of the second conveyance roller 68a (described later in 65 cases) is on the B side of the machine. The paper size specifying cam plate, which will be described later and which protrudes forward from the front plate of the base 65, is pressed against the lower surface of the freely rotating auxiliary roller 103a of the paper feed roller 103, which is the paper feeding means of the machine B. The state in which the machine B and the paper feeder A are correctly connected by being inserted into the state in which the detection switch group 104 is selectively contacted (
Figure 1).

67 is 0'S arranged inside the front end side of the flat box-shaped base 65.
This is the second conveyance roller axis, which is an axis parallel to the first conveyance roller @56. This shaft 67 has its left and right ends formed in the left and right side plates 65a and 65b of the base body 65, respectively, through longitudinally elongated holes 6.
5e (Fig. 16), it is freely rotatably supported on a bearing 67aφ67a attached to the bearing 67a (2), which can freely slide up and down (Fig. 16).
The bearing 67a is forced upward by the long hole 65.
It is lifted until it is received by the L end of e.

68a and 68b (FIGS. 7-14) are a plurality of Σ+'S 21fy mounted on the second conveyance roller shaft 67,
+A roller. 68a is one-way clutch 68
The roller 68b is attached to the shaft 67 via the roller C, and the roller 68b is attached to the shaft 67 so as to rotate freely, and has a slightly smaller diameter than the roller 68a.

The upper surface of each of the 2111i1 feed rollers 688 and 68b is exposed to the outside through a through hole formed in the front end side surface of the -j face plate 65c of the base body 65. When paper feeder A is connected in line with book aB, each of the rollers 68a
The middle 68b is connected to each paper feed roller 103 (
The freely rotating roller I: +103a (for example, a roller manufactured by Acecool) is positioned corresponding to the lower surface of the roller 103a, and the roller 68a is in contact with the lower surface of the roller 103a, and the second l119 feed roller shaft 67 is It sinks a little against the spring plate 67b, and due to the reaction force of the spring plate as it sinks, both 68a*103a come into a pressed contact state y7G. The roller 68b is the roller 68a
It faces the lower surface of the freely rotating roller 103a of the corresponding paper feed roller 103, with a gap slightly smaller in diameter than that of the paper feed roller 103.

69 (Fig. 7φ17) is a timing pulley provided approximately in the middle of the second 1n feed roller shaft 67 so as to be free to rotate.
A is the left thrust stop of that pulley.

69b is a right side thrust stop, both thrust stops 11-1, 6
The interval between 9a and 69b is thicker than the length of pulley 69=J method. 69c has a support 67 on the right side of the pulley 69.
The washer 69d loosely fitted is a coil spring compressed between the washer 69c and the left thrust stop 69b. Therefore, the pulley 69 is constantly biased toward the left thrust stopper 69a via the one-way wheel 69c by the force of the coil spring, and is pressed into the left thrust stopper 69a and the washer 69c. A mechanism (friction clutch mechanism) is constructed.

Reference numeral 70 denotes a swimming pulley 71 fixed to a substantially intermediate position of the first conveying roller shaft 56 in correspondence with the above-mentioned pulley 69.
This pulley 70 and the 2111th feed roller 111h6
It is a timing belt that is suspended between 7 and 7.

Then, when the first conveyance roller shaft 56 is rotationally driven, the pulley 70 → bell!・71 → Pulley 68 → Boob friction holding force of friction clutch mechanism → second conveyance roller' shaft 6
7→The rotational force is transmitted to the second conveyance roller 68a through the path of the one-way clutch 68c, and the roller 68a is rotationally driven in the paper feeding direction.

However, if the rotational load force of the US2 conveyance roller 68a is greater than a certain set value, even if the first conveyance roller shaft 56 is rotationally driven, the pulley 68 on the second conveyance roller shaft 67 side will thrust to the left. Stop 69bN washer 69
A slip rotation occurs between the shaft 67 and the shaft 67 against the frictional force.
-1: is idle and the 2411th feed roller 68a is not forcibly rotated. The effect will be explained in a separate section.

73 (Figures FFI7 and 14) is provided with bearing pieces 65f and 65f formed by extending the side plates in one direction at the bases of left and right side plates 65a and 65b of a flat box-shaped base 65, with the nozzles bearing the sides. It is a drainboard-shaped paper guide plate that can be freely raised and lowered with respect to the upper surface plate 65c of the base body, and is kept tilted at all times. By tilting it down, a paper conveyance gap path is formed between the base upper surface plate 65c and the kite plate 73, leading to the conveyance roller 57 of f51 and the second conveyance roller 68a◆68b.

74 (Figs. 7 and 18) is a cam plate row for use 1 (size specified cam plate) arranged in the space on the tip side of the flat box-shaped base 65.
Among the various the-is scales 76 (No. t614) displayed on the dial surface by manually turning the size dial 75 (Fig. 16) exposed on the outer surface of the right side plate 65b of the paper storage section 1, When the scale of the paper size loaded and stored on the table 5'2 is aligned with the index 77, a combination of protrusions corresponding to the paper size will be inserted through the through hole formed in the front plate 65d of the base 65, to the front of the front plate 65d. It becomes a state where it protrudes. This dial operation allows you to specify the paper size to be used from paper feeder A to machine B.
Be sure to do or check before connecting to. The base front plate 65d corresponds to the paper size specification using the dial.
When the paper feeder A is connected to the machine B as described above, the cam plate protrusion protruding forward from the cam plate selectively puts the switches in the paper size detection switch row 104 on the machine B side into the suppressed state. . As a result, the paper size conditions to be used are automatically set in the control circuit on the book 42B side.

78a to 78k (Fig. 7-18-19) are mechanisms that apply or release a rotational load to the first conveying roller shaft 56 in conjunction with the switching operation of the size dial 75. This will be explained in a separate section.

S5-36 (ffi6-71g) is husband h tl”=
1. 'a transport roller 57 and second transport roller 68a-6
The first and ff12 paper sensors (for example, microswitches) are arranged at two locations, one near the f'JTJl transport roller 57 between 8b and the other approximately in the middle position, respectively. In the middle direction? 7. It is supported by the base body 65 via a sliding support member or the like so that the movement adjustment and positioning can be performed.

(5) Control circuit and others FIG. 20 is a block diagram of the main control circuit, and FIG. 21 is a control circuit for the beam lid motor 8. These circuits are mounted on the outer surfaces of the chassis left and right side plates 3d and 3c as printed circuit boards 79a and 1179b (see Fig. 4, 5). A transformer and the like are arranged on the chassis bottom plate 3a, but are omitted from the diagram.

80-81 issue 82 (Figure 6 @ 7) is the front plate 3 of the chassis
b. A decorative board that hides the outer surfaces of the right side panel 3c and the left side panel 3d, respectively, and is removable with screws or the like. Reference numeral 83 is an upper lid that closes the upper surface opening of the chassis, and a pivot 84 (fourth to
It can be opened and closed freely around the center (Figure 6).

Reference numeral 85 denotes a box-shaped opening/closing door disposed on the rear opening side of the chassis, and a hinge 85a on the rear vertical side of the left side panel 3d of the chassis.
It can be opened and closed freely around (M5φ7 diagram). This box-shaped door 85 is made of transparent or 41-color transparent synthetic resin.
Even when the door 85 is closed, the amount of paper on the internal table 5L can be visually confirmed.

MS (Figure 1-8-9) and LED are on the chassis-right side plate 3
A main switch and an indicator lamp are disposed on the upper surface of the decorative board 81 for c.

S7 (Figures 1 and 4) is a joint switch that detects when the paper feeder A is connected to the wooden crosspiece B, and is located near the front side of the right side panel 3c of the jacket. be. When the paper feeder A is connected to the wooden frame B, it is pressed by the tip of the positioning pin 116 on the seat side of the paper feeder pedestal, which is fitted into the positioning hole 116a on the paper feeder A side, and turns on and maintains that state. The fact that the paper feeding device A is connected to the wooden crosspiece B is input to the control circuit.

38 (FIGS. 1-4.7 to 9) is a door switch supported via a swing lever 89 near the rear side of the right side panel 3C. When door 85 is closed, door 8
When the door 85 is opened, it is turned off, and the door closing signal or opening signal is input to the control circuit. However, this door switch s8 is attached to the decorative plate 81 on the chassis right side panel 3c.
; and only when the upper M83 is closed, the protrusions 83a on the 81φ83 side (the protrusions on the decorative panel 81 side are omitted in the figure) are positioned at the position where the protrusions 85b of the closed door 85 act. Retained. When the decorative panel 81 is removed or the top cover 83 is opened, even if the door 85 is closed, the switch s8 remains in the position where the door protrusion 85b escapes (as shown by the two-dot chain line in FIG. 4) and is turned on. Not done.

90 corresponds to the light-receiving element CdS for detecting paper out, which is arranged inside the bottom plate of the wooden board B side Cera)/insertion+jl Ol in the flat box-shaped base 65 of the single-sheet conveyance/waiting section a 2. This is a light source lamp that is arranged in a vertical direction. When this lamp 90 is turned on, its light passes through a through hole formed in the bottom plate 65e of the base 65 and a through hole formed in the bottom plate of the cassette insertion slot 101, and enters the light receiving element CdS.

Reference numeral 86 (FIGS. 7 to 9) is a movable side plate supported on the inner surface of the chassis left side plate 3d via a bracket 87 so that its position can be changed freely. The distance between the chassis and the fixed reference side plate 88 on the inner surface of the right side plate 3C is adjusted to the width size of the paper to be used by changing the position of the paper stacked on the stand 5 according to the width size of the paper to be used. The paper P is loaded and stored on the platform 5 between the movable side plate 86 and the fixed reference side plate 88 whose positions have been adjusted as described above, with the front surface of the stacked paper abutting against the inner surface of the chassis front plate 3b. The rear half plate 5e is divided into two parts (FIGS. 6 and 7), and the latter half plate 5e can be freely attached to and detached from the front half a+5a.

(8) Operation (sequence) Figure 22 is an overall flowchart of the device operation, Figure 23
The figure mainly shows the operation flowchart of the vertically movable paper storage table mechanism, FIG. 24 mainly shows the operation flowchart of the paper feed/conveyance/standby mechanism for one sheet of paper, and FIG. 25 shows the operation flowchart of the beam lid motor 8.
2 is a drive timing chart.

a. Mount the paper feeder A as described above on the rail 113 of the pedestal set several times apart on the wooden frame B, turn the paper size dial 75 to align the scale 76 of the paper size to be used with the index 77, and then remove the paper feeder A. Connect A to wooden crosspiece B.

This turns the joint switch S7 on.

In addition, the paper size conditions to be used are input to the control circuits of trees a and B by a switch 104 on the machine B side that is selectively pressed by a cam plate 74 on the dial shaft.

Next, the main switch MS is turned on. Display lamp LE
D lights up blinking. The paperless lamp 90 lights up and light enters the CdS on the B side of the machine.

b. Door switch S8 is turned off when the door 85 is closed 1m for paper storage, and the lifter motor 8 is turned off by that signal.
The electromagnetic suction device rJ22 is energized, and the motor is released from the hook plate 21. After this release, the motor 8 is energized in the reverse direction.

This causes the paper storage table 5 to move downward. When the protrusion 5C on the side of the table 5 comes into contact with the table lowering position detection sensor S4 due to the downward movement of the table 5, the sensor S4 is turned on. The power supply to the lifter motor 8 is cut off by this ON signal, and after a time period (motor stop time F) for the motor to come to a complete stop has elapsed, the power supply to the electromagnetic suction device 22 is cut off, and the claw plate 21 stops the motor 8. The platform 5 is stopped and held at the lower limit position.

If there is previously used paper stored in table 5'- that is of a different size, etc. from that used this time, remove it, and -1 = K? Open s3 and move the movable side plate 86 to the position corresponding to the paper size to be used this time. Next, on the table 5, for example, about 2,000 sheets of used paper P are stacked and stored.

After storing C1 paper, first close the top lid 83, then close the door 8.
Close 5.

This turns on the door switch S8, and the signal energizes the electromagnetic suction device M22 of the lifter motor 8, thereby releasing the motor.

Next, the motor 8 is energized in the forward rotation direction, and the table 5 moves upward.

d, this table 5'' Due to the negative movement, the upper surface of the stacked paper P eventually reaches the lower limit level PL of the paper upper surface level range PL-PH. At that point, the optical path of sensor S1 is at the fourth position of lever 23.
It is blocked by the bidirectional protrusion 23d. A predetermined set timer time from the time of that signal (the time when the top of the stacked paper P continues on the platform 5)
The power supply to the motor 8 is cut off after the elapsed time (time to almost reach the lower limit L novel PH due to the upward motion of It is stopped and held at position A.

e. Next, based on the fact that the first paper sensor S5 in the paper transport path does not detect the presence of paper at this point, the paper feeding program of the control circuit is started and rotational drive of the transport motor 24 is started. At the same time, the first magnetic field device,
36 is momentarily energized, the one-rotation clutch 36 is turned on, and the paper feed support shaft 33 is driven one rotation. At this time, while the ff1l electromagnetic device 36 is being energized, the second electromagnetic device 52 is also energized.

As a result, the paper feed roller 40 is rotated by one rotation of the paper feed support shaft 33. Furthermore, since the second paper sensor S6 does not detect the presence of paper, the power to the second electromagnetic suction device 52 is cut off. As a result, the clutch 50 is turned on, and the first and second conveyance rollers 57 and 68a are also driven to rotate along the rotational force transmission path described above.

As a result, the rotation of the paper feed roller 40 feeds the topmost paper of the stacked papers P, and the paper is moved to the leading edge separating claws 45 and 4.
5 and is sent out to one sheet, then the rotating first
41F7 It is bitten between the feed roller 57 and the driven presser roller 59 and is relayed, and passes through the paper conveyance gap passage between the base top plate 65c of the single-sheet conveyance/special unit 2 and the drainboard-shaped paper guide plate 73. The base body 65 is conveyed toward the tip thereof.

During this conveyance, the rotation of the paper feed roller 40 ends, but the fed-out paper is transferred to the first m-th feed roller 57 and the presser roller 59.
It is continuously conveyed by the rotational drive of.

Even after the active drive is cut off, the paper feed roller 4o idles on the shaft 39 via the one-way clutch 41 due to the moving force of the paper being continuously transported, thereby reducing the paper transport resistance.

f, 7. The paper that enters the gap path between the body top plate 65c and the guide plate 73 is first passed through the first paper sensor s5 and then the second paper sensor s5.
The transport movement is detected by the paper sensor s6. After that, the second conveyance roller 68a whose tip edge is rotating and the freely rotating roller 10 of the paper feed roller lO3 on the side of the machine B that is in contact with it
3a and the roller 68a and roller 103a
, and a second conveyance roller 68b that is freely rotatable on the shaft 67, and a roller 10 on the paper feed roller side that faces the second conveyance roller 68b with a small diameter gap therebetween.
3a smoothly without getting caught, then move forward a little further and reach the reference line 0-0 (near the tip edge of the base 65).
7.141Δ), the rotational drive of the 1111 it feed roller 57 and the second conveyance roller 68a interlocked therewith is stopped at the timing at which the conveyance movement stops, thereby stopping the conveyance.

il and the 21st IliI feed rollers 57 and 68a are stopped when the first paper sensor S5 detects the leading edge of the paper that has entered the paper transport gap path due to the rotation of the first transport roller 57 and the driven roller 59, and then the second When the paper sensor S6 detects the paper, the rotating encoder gear cutting disc 31 and the photoelectric element 31a (FIG. 13) start counting the number of pulses based on the detection signal, and the preset number of pulses is counted. At this point, the second electromagnetic device 52 is energized, the pawl arm 52a engages the toothed rear outer ring 51 of the clutch 50, and the clutch 50 is turned off.

The above number of pulses depends on the paper conveyance speed, the distance from the second paper sensor S6 to the base line O-O, and the first and second
It is calculated from the paper movement amount based on the inertial rotation of both the rollers 57 and 68a after the rotational drive of the MJ feed rollers 57 and 68a is cut off, and is preset in the control circuit. The set number of pulses can be corrected later as necessary. - Also, after it is detected that the leading edge of the paper has passed the second paper sensor S6 position, the paper-out lamp 90 is turned off, and the display lamp LED changes from flashing to continuous lighting.

Then, the above-mentioned paper whose conveyance was stopped with the leading edge aligned with the base line O-O position is then moved to the paper feed roller 1 on the machine B side.
03 remains on standby until it is rotated by the sequence program on the machine B side. If the paper size used is small, the trailing edge of this standby paper is attached to the paper feed roller 40.
and the 1111i1 feed roller 57,
If the paper is large, it has not yet been removed from the paper feed roller 40. Therefore, in either case, when waiting for the second form, the first
Both the paper sensor and the second paper sensor are held in the on state due to the presence of the waiting paper.

The paper feed roller 103 on the machine B side waits until a predetermined timer time elapses (at least the paper refeed time for continuous copying on the machine B side, for example, about 1 to 2 seconds). If re-conveyance is not performed, the power to the conveyance motor 24 on the paper feeder A side is temporarily cut off to save power when the timer time elapses, and when the motor stops (approximately 2 seconds), the second Power to the electromagnetic device 52 is also cut off,
Waits while paper feeding and transport are stopped.

g. When the paper feed roller 103 on the machine B side is rotated based on the sequence program on the machine B side, the leading edge of the waiting paper is sandwiched between the 2112nd feed roller 68ae68b and the paper feed roller 103. The paper is drawn from the paper feeder A side to the machine B side by the rotational force of the paper feed roller 103, and is fed into the machine B.

At this time, the paper feed roller 40 on the paper feed device A side, the first and second
None of the 111iI feed rollers 57 and 68a are actively rotated, but each of the above rollers 40, 57, and 68
A is attached to each support shaft 39, 56, 67 via a one-way clutch 41@58-68C, so all of them idle as the paper feed roller 103 on the machine A side transports the waiting paper. The transport resistance is reduced.

h. When the trailing edge of the paper passes the position of the first paper sensor S5 as the waiting paper is pulled toward the machine B side, the sensor S5 is turned off and the conveyance motor 24 is stopped based on the signal. When the motor is running, the motor is energized,
Further, when the second electromagnetic device w52 is de-energized, the device 52 is energized (therefore, the clutch 50 is held off). Next, the backflow is extended for a moment to the first electromagnetic device 36, the one-turn clutch 34 is turned on, and the paper feed roller 40 is rotationally driven by driving the paper feed support shaft 33 one rotation.

Due to the rotational drive of the paper feed roller 40, the next paper of the stacked paper P on the table 5'' is sent to the next sheet, and its leading edge is at the nip between the first conveyance roller 57, which has stopped rotating, and its passive roller 59. A slight loop of paper is formed between the first conveyance roller 57 and the paper feed roller 40 until the rotation of the paper feed #J (roller 40 is completed).

When the trailing edge of the preceding paper passes the second paper sensor S6 position, the sensor is turned off, and based on the signal, power to the second electromagnetic device 52 is cut off and the clutch 50 is turned on. Possibly the first and second conveyance rollers 57Φ68a
rotational drive is started. As a result, the upper surface plate 65C of the base 65 is arranged so that the next paper follows the previous paper.
The paper is introduced into the paper conveyance gap passageway between the drainboard-shaped paper kite board 73 and the paper board 73 .

When the leading edge of the paper passes the position of the second paper sensor s6, the switch s6 is turned off, 1 the encoders 31 and 31a start counting pulses based on the signal, and the electromagnetic device 52 By energizing the clutch 50 and turning off the clutch 50,
When the leading edge of the paper corresponding to this length matches the base line 0-0, the conveyance is stopped and the paper enters a standby state. The trailing edge of the preceding sheet has already moved between the two rollers before the leading edge of the next sheet enters between the second transport rollers 68a and 68b and the freely rotating roller 103a of the paper feed roller 103 on the machine B side. There are exceptions.

In addition, the paper feed unit 103 on the machine B side feeds the preceding paper to the machine B.
The leading edge of the preceding paper is detected by the first paper sensor s5, and the leading edge of the next paper fed out by the rotation of the paper feed roller 4o based on the signal is detected by the first paper sensor s5. If the trailing edge of the preceding paper has already reached the second paper sensor S6 when it reaches the first transport roller 57, the next paper continues to pass the first transport roller 57 without forming a loop. It is rotated and fed one calendar year.

i. The next paper in the standby state is introduced into the machine B by re-rotating the paper feed roller 103 on the machine B side.

J, i77 and then wood 4'l' B side paper feed roller 10
3 is rotated simultaneously, on the paper binding device A side,
The cycle of introducing the first standby paper into the machine, transporting the next paper to the work sheet, and waiting is automatically repeated.

k, and the stacked paper P on the table 5 is, for example, 20 to 30. When the paper top surface position level reaches the lower limit of the allowable range, PL.
decreases to Then, as mentioned above, the drop is detected by the level sensor sH, and the platform 5 moves upward.
2A movement is stopped after a certain period of time has elapsed. At this time, the upper surface of the paper has almost reached the upper limit level PH. This table 5,
1-The paper feed mechanism that feeds the topmost paper of the stacked paper P to the edge of one sheet is the paper feed roller 10 on the machine B side where the standby paper in the special equipment section 2 is fed.
Each time the paper is conveyed by the rotation of 3, it feeds out the paper to the special equipment section 2.

Thereafter, as the paper is sequentially consumed, each time the level drops to the allowable lower limit PL, the raising movement of the platform 5 is automatically executed intermittently, and the paper on the top surface of the stacked paper P reaches the level of the platform 5'' until it is consumed. Always at a predetermined tolerance level P H-P
It is maintained at L.

In this way, a large amount of paper P, for example 2000 sheets, stacked and set on the table 5'2, can be continuously fed to the image forming apparatus B as long as the image forming apparatus B is in operation.

Also, the preceding paper and the next paper in paper feeder A are fed to machine B.
Even if the speed at which paper is drawn in by the side paper feeding means 104 changes due to changes in magnification, or even if the same speed varies depending on the model, the paper is always fed and conveyed at intervals, so that the next paper is Paper feeding errors caused by the leading edge of the paper catching up with the trailing edge of the preceding paper do not occur.

■, Sequential consumption of the stacked paper P on the table 5, 1 sequential intermittent upper y of the table 5 progresses, and when the -1- side position of the table 5 itself exceeds the lower limit PL of the paper top surface position level, at that point the table 5 side protrusion 5
"C is the stand" - This sensor is turned on when it comes into contact with the eye position sensor S3, and the signal is inputted to the control circuit. When the paper feeding of the remaining paper on the nip 5 progresses and the last paper is sent out from the table 5'', the lever 23 is tilted and rotated αLL.
The optical path of the sensor Sl is opened, and the signal thereof is input to the control circuit. Then, the last sheet sent out waits in the special equipment section 2, and then is introduced into the tree 4 or IIB side, so that the first sensor S53/ is connected to the first and second sensors S.
At the 114th point where all of 5 to 56 are off, the paperless lamp 90 is turned on, and the display lamp LED is turned on.

The light from the 1t empty lamp 90 enters the light receiving element CdS on the machine B side, and the paper out display/warning circuit on the machine B side is activated, indicating that there is no paper in the paper feeder A side. display·
Be warned. Generally, in this machine B, the mechanism operation is automatically stopped when the display/warning circuit is activated.

m. Then, when the door 85 of the paper feeder is opened to replenish paper, the table 5 automatically descends to the lower limit level and stops as described above, so a large number of sheets of paper can be loaded and stored on the table 5 again. do. Then, by closing the door 85, the sequence of item C, item 19 is executed again, making it possible to continuously feed a large number of sheets.

(7) In the case of abnormality, during the intermittent and sequential upward movement of the platform 5 as the stacked paper P is sequentially consumed, paper jams and If the upward movement of the table 5 continues due to some other abnormal cause and the top surface of the paper rises too much, the third upward protrusion 23c is caused by excessive rotation of the lever 23.
contacts sensor S2, and it is detected whether the top surface of the paper is too high.

Based on the detection signal, the lifter motor 8 is reversely rotated and the table 5 is moved downward. When sensor St detects that the top surface position of the stacked paper is lowered due to this lowering and the position has fallen to the lower limit level PL of the paper top surface position level range, or sensor S3 detects that the top surface of table 5 is lowered by sensor S3.
When it is detected that the ball has fallen below the detection level, the lifter motor 8 is rotated in the normal direction based on the signal, and the table 5 is again moved for a certain period of time. Lowering this platform 5 again” 21
Due to the operation, the cause of the abnormality disappears naturally, and the upward movement of the platform 5 stops when the top surface position of the stacked paper is normal and within the bell range PHPL due to the action of Shihachi-23 and sensor St. When this occurs, the control circuit determines that the abnormality has disappeared. If the cause of the abnormality does not disappear by itself with one automatic lowering and re-raising of the table 5, and the top surface of the paper is too smeared sensor S2 is activated, the above-mentioned lowering and re-raising of the table 5 is repeated several times. If the above-mentioned recovery does not occur within the number of times set in advance in the control circuit, the control circuit determines that there is an abnormality in the device, and the operation of paper feeder A is stopped, and the 7I notification buzzer built into the device is activated. It is designed to notify the operator of abnormalities.

1! First, the malfunction of the paper-1 side over-up sensor S2 due to the paper flipping is a cause that can be naturally removed by lowering and re-raising the Sendai 5 once or several times within a certain range. 12-side of paper based on paper] If it is too sticky, the control circuit automatically lowers the table 5.
+, J-'yl operation sequence control removes the abnormality and activates the warning buzzer.
The paper feeding operation continues.

Regarding the lowering of the table 5, even after the time set in advance in the control circuit has elapsed since the raising or lowering of the table 5 has started, the paper 1 side 1/bell sensor Sl is still on the table.
Upper limit I/bell sensor S3. Alternatively, when the lower platform lowering limit level sensor S4 does not operate, it is determined by the control circuit motor abnormality check subroutine that there is a device abnormality, and in this case as well, the operation of the support equipment A is stopped and the Miyako buzzer is activated.

(8) Friction clutch mechanism (Figures 7 and 17) The aforementioned friction clutch mechanisms 69a to 69 interposed between the second IFO feed roller shaft 67 and the timing pulley 68 that drives it
d intervenes to eliminate the following troubles.

In other words, the paper feed roller 103 on the B side of the machine is jammed.
At the time of occurrence or due to an erroneous operation, the &32 transport roller 68a may come into direct contact with no paper in between and stop rotating. In this case, the 21st WJ feed roller 68a is pushed downward against the spring plate 67b in the summer compared to the case where it is in contact with the freely rotating roller 103a of the S interleaving roller 103 due to the contact angle with the paper feed roller 103. The paper feed roller 103 is in contact with the lower surface of the paper feed roller 103 with a fairly strong pressing force due to the reaction force of the spring plate 67b. In such a state, the second conveyance roller 68a is connected to the paper feed roller 103.
If the paper feed roller 103 is configured to be forcedly driven in the rotation 11i4 against a strong pressing force, the rubber peripheral surface of the paper feed roller 103 will be scraped. In this example device n, the second conveyance roller shaft 67
is rotationally driven through the frictional flange mechanisms 69a to 69d as described above, so under the circumstances as described in 2.
Due to the large rotational load on the 1-rit feed roller 68a, the pulley 68 slips and rotates, and the roller 68a is not forced to rotate, so the paper feed roller 103 is not scraped. The friction clutch force of the friction clutch mechanism can be arbitrarily determined by selecting or adjusting the tension force of the spring 69d.

(9) Loading mechanism (Figs. 7, 18 and 19) A mechanism 78a that applies a rotational load to or releases the load on the 11th Irl feed roller shaft 56, which is linked to the switching rotation operation of the paper size instruction dial 75 mentioned above. ~78k will be explained in detail.

Regarding the paper transport load in the paper transport process due to the rotational drive of the first and t52 paper transport rollers 57 and 68a, in the case of transporting small size paper (B5 / A4 (horizontal transport)),
The load condition is different when transporting large size paper (B4 (1) feed).

That is, the paper feed roller 40 is connected to the shaft 39 by a one-way clutch 41.
After the rotation of the paper feed roller is stopped, the first and second portions of the paper that have not come out from under the roller are removed.
Although the conveyance resistance of the paper is made as small as possible by idly rolling on the shaft 39 as the paper is moved by the conveyance rollers 57 and 68a, it is not zero, and the paper feed roller 40
The paper pressing force and idling resistance act on the paper as a transport load.

By the way, in the case of conveying small-sized paper, the trailing edge of the paper conveyed by the first conveyance roller 57 comes out from under the paper feed roller 40 during the conveyance, and the +14? From the point, the paper feed roller 40 continues to convey for a while without the above-mentioned conveyance load, and then the section 1 and the second conveyance roller 57-68
The conveyance is stopped when the clutch 50 is turned off as the encoders 31 and 31a count up a predetermined number of pulses.

However, in the case of transporting large-sized paper, the trailing edge does not come out from under the paper feed roller 40, that is, the paper continues to receive the transport load from the paper feed roller 40 until the transport stops.

In other words, in the case of φ size paper, the transport load when the transport is stopped is light, and in the case of large size paper, it is heavy. Therefore, the predetermined number of pulse counts set in the circuits of the encoders 31 and 31a is set, for example, to a number that causes the leading edge of the paper to stop when it reaches the base line O-0, based on the conveyance of small-sized paper. If this is the case, when a large size sheet is conveyed, the sheet will stop before the leading edge of the sheet reaches the base line 0-0 due to the above-mentioned heavy conveyance load. On the other hand, if the setting is based on the transport of large-sized paper, when transporting small-sized paper, the 1fG feed/stop/stop transport load is light, so the leading edge of the paper slightly overruns the baseline O-0ff. , and the paper is stopped.

Then, the paper stops before the leading edge reaches the base line O-0, and when it is fed into the machine B by the paper feed roller 103 on the machine B side, the machine B forms an image. There will be some paper feeding delay with respect to the progress of the process.

Conversely, if the leading edge overruns the base mo-o and the paper is stopped, when it is introduced into machine B, an excessive paper loop will occur before the timing roller on machine B side. This can cause jam problems.

The load R structure eliminates such inconvenience. In FIGS. 7-18 and 19, 78a is a cam fixed to the shaft 75a of the paper size indication dial 75, and 78b is arranged on the back side of the upper plate of the base 65 so that it can slide freely in the front and rear directions using a pin 78C and a long hole 78d. This is the advance/retreat bar that was set up. The advancing/retracting rod 7'8b is constantly urged forward by a tension spring 78e, and its tip end surface is always pressed against the surface of the cam 78a. When the large diameter part of the force A 78 a due to rotation of the dial 75 corresponds to the tip surface of the retractable rod 78 b, the retractable rod 78
b moves backward against the spring 78e. When the small diameter part responds, it moves forward. In this example, when the 84 edition scale (large size paper) on the dial 75 is aligned with the index 77 (Fig. 16), the advance/retreat rod 78b is kept in the forward position, and when the A4 edition or 85 edition scale (small size paper) is aligned, the advance/retreat lever 78b is kept in the forward position. This is the relationship in which the rod 78b is maintained in the retracted position.

78f is a coiled spring-wound body having a flange 78g on the left end side, which is fixed to the first conveying roller shaft 56; 78h is a warehouse 78i on the right end side, which is supported loosely on the shaft 56 on the right side. A coil spring with a coil spring wound on the body; This is a locking pawl formed on the outer surface of the warehouse 78i of 78h.

When the advancing/retracting rod 78b is held in the forward position, the rear end of the rod is moved to a position where it does not interfere with the locking pawl 78, and is not rotated by the first conveying roller shaft 56. Accordingly, the left and right coil springs 78h, 78h, and the coil spring 78j are all rotated together with the shaft 56. When the advancing/retracting rod 78b is held in the retracted position, the rear end of the rod is in a position where it interferes with the locking pawl 78, and at this time, when the first conveying roller shaft 56 is rotationally driven, it moves to the right side. The rotation of the spring drum 78h is prevented by the engagement between the rear end of the advancing and retracting rod 78b and the locking pawl 78, and therefore the shaft 56 is rotated while causing frictional slip between the cylinder 78h and the coil spring 78j. Rotate. That is, the frictional slip force acts on the shaft 56 as a rotational load.

- Set the predetermined pulse count number set in the encoder circuits 31 and 31a to the number that will cause the paper to stop when the leading edge of the paper coincides with the base line O-0, based on the conveyance of large-sized paper. If it is, dial 75
When adjusted to 34th edition, which is a large size paper, the advance/retreat lever is 78.
At the rear end portion of b, the spring winding on the right side escapes from the cylinder 78 IN, so that the above-mentioned rotational load is not applied to the first conveying roller shaft 56. Therefore, the paper stops with its leading edge aligned with the base line 0-0.

On the other hand, use Dial 5 on large size paper such as A4 or 85
When aligned with the plate, the barrel 78h is hooked to the spring winding on the right side at a part of the rear end of the advancing/retracting rod 78b, and the above-mentioned rotational load acts on the lever 56. As a result, the rotational load is 411i when the conveyance of small size paper is stopped, similar to the conveyance load that acts on the paper feed roller 40 when the conveyance is stopped in the case of large size paper! It acts as a feeding load to suppress overrunning of the small size paper, and the small size paper also comes to a stop 11 when its leading edge substantially coincides with the base line O-0.

As explained above, by applying a load to the first conveying roller shaft 56 when handling small-sized paper, and not applying the load when handling large-sized paper, the paper stops at a zero position regardless of the size. It is possible to make 0 almost the same.

The load can be set arbitrarily by appropriately adjusting the tightening force of the coil spring.

As an electrical means, two pulse counts are set in the encoder circuit, one for transporting large size paper and one for transporting small size paper, and switch k (20th The above-mentioned set pulse count number may be switched by turning on and off the pulses in the figure.

(lO) Miscellaneous In the A descending paper storage mechanism described in item (2) of 111, since the subblock I・l 7 (ff'r 447 figure) is attached to the shaft 12 via the one-way clutch 16, the service When inspecting or repairing the paper feeder A by a person, etc., the joint switch S7 is turned on artificially, and the door 8 is turned on.
When the door switch S8 is turned off by opening the door switch S8 and the platform 5 moves downward, a hand or other object may be accidentally caught between the descending platform 5 and the chassis bottom plate 3a, causing the platform 5 to be forcibly stopped. However, sprocket 17 is one-way clutch 16
Due to the presence of the motor 16, the reverse driving force of the motor 16 causes the table 5 to idle on the shaft 12 and the table 5 is not forcibly lowered.This protects hands and objects that are caught, and prevents overload from acting on the motor 16. is prevented.

When the paper feeding device A is not in use, the conveyance section 2 protruding forward from the large-capacity paper storage section 1 is largely rotated in a substantially hanging state around the support 57, and is folded into the front plate of the storage γf6 into the shape IB. If this is possible, the overall size will be compact and convenient for storage.

(113*Summary of the Invention μT) In short, the great invention is a large-capacity paper storage section that can store a large number of cut sheet papers, and a button for the storage section that is connected to the 2
A paper transport section that fits into the paper cassette insertion slot 1c of the image forming device, and a paper feed mechanism that feeds the sheets of paper from the large-capacity paper storage section to the paper transport section one by one.

A paper transport mechanism that transports the fed paper at predetermined positions rf, t of the paper transport unit and temporarily stops and waits for the paper to be transported when there is no paper in the paper transport unit or when the waiting paper is The paper feeding mechanism is configured such that when a sheet of paper is fed by the operation of the paper feeding means on the rain forming device side, one sheet of paper on the large-capacity paper storage section side is automatically fed out, conveyed, and waited in the paper conveying section. and the paper conveyance mechanism are operated in conjunction with each other. This paper is summarized as follows.

In other words, the paper feeding device of the great invention is compatible with the general paper cassette insertion type image forming apparatus 1 that does not have a built-in multi-sheet deck mechanism (in contrast, the paper feeding device side is connected to the cassette slot on the main body side). By inserting the paper conveyance unit into the cassette and using the same combination.

Since there is a large-capacity paper storage section on the paper feeding device side, it is possible to continuously copy a large number of sheets, such as 1 f, 100 sheets, 20 or 3 sheets, etc., without interruption on the machine side.

When the machine's paper cassette is inserted into the machine's cassette, a single sheet of waiting paper is fed into the paper transport section of the paper feeding device inserted into the paper cassette. Is the next sheet of paper automatically fed out and conveyed to the paper conveyance section and ready for replenishment immediately?) The signal line for exchanging the paper feed timing etc. between this machine and the paper feeder is This is not necessary.In other words, to connect the paper feeder to this machine, you only need to physically fit it in the same way as inserting the paper feeder's paper transport unit metal set into the cassette slot of this machine. This is a highly reliable general-purpose unit that can be used for a wide variety of paper cassette inserting two-picture one-image forming devices that you currently have, and can perform continuous copying of multiple sheets without interruption. It is effective and suitable as a large-capacity automatic paper feeder.

[Brief explanation of the drawing]

The drawings show one embodiment of the paper feeding device of the present invention, and FIG. 1 is a cutaway side view of the paper feeder connected to the image forming apparatus, FIG. 2 is an exploded oblique view of the pedestal, and FIG. The figure is a cross-sectional view of the rail with the rollers inserted, Figure 4 is a right side view with the right side decorative board removed, Figure 5 is a left side view with the left side decorative board removed, and Figure 6 is a longitudinal right side view. Figure 7 is a cross-sectional view, Figure 8 is a cross-sectional view.
The figure is a longitudinal sectional front view taken along line 7 (8)-(8), Figure 9 is the same view taken along line 131 (9)-(9), Figure 10 is an enlarged plan view of the beam lid motor section, and Figure 11 The figure is an enlarged plan view of one part of the swinging paper detection mechanism, FIG. 12 is a side view of the same, and
Figure 3 is an enlarged side view of the gear train of the paper feed/conveyance mechanism.
Fig. 14 is a plan view of the paper transport mechanism section, Fig. 15 is a side view showing the state of the paper transport/special equipment section before connection, Fig. 16 is an enlarged side view of the paper size designation dial section, and Fig. 17 18 is an enlarged plan view of the friction clutch mechanism portion, FIG. 18 is a slope view of the load mechanism portion, FIG. 19 is an enlarged longitudinal sectional plan view of the friction cylinder portion of the mechanism, FIG. 20 is a block diagram of the main control circuit, and FIG. The diagram shows the control circuit for the lift lid motor, Figure 22 shows the overall flowchart of the device operation 1., Figure 23 shows the operation flowchart 1 of the A descending paper storage mechanism, and Figure 24 shows the paper feeding and conveyance. - Operation flowchart of the standby mechanism, Fig. 25 drive timing chart of the beam lid motor. A is the paper feeder, 1 is the paper storage unit, 2 is the transport unit,
B is the main unit of the image forming apparatus, C is the pedicle of the main unit, and D is the base of the paper feeder. Patent Applicant: Canon Co., Ltd. Figure 48 Figure 7 491-1 Figure 441 Figure 2 24 Figure 25 (Go to Part 9) Procedures Amendment Book March 24, 1982 [1! I5'1 Office Chief Yusugi No. 11 Pheasant 1, Tenant Indication Showa 1157 11th Governor Permit No. 1 T35961 No. 2, Name of IJ? @ Po (device 3, 1ll
i ilg, relationship with the person α i1 ke π ``Name of the person in charge (1υυ) Gyanon closed company 4 agent 5 Subject of amendment Myosha 1st category ``The scale of invention fill 7i glare'' Grasp of. 6°1°+i jE C') Pi stirring ・
4', 1...\(1) Detailed information 7. Draw as per UJ below. Page line Wrong Correct 11
6 (Figure 7.9) (Figure 7 @ Figures 9 and 11)〃
11 Koro 7@7, Koro 7・713 7
Correct @Ku JI'J'iE%< lsK
if'J b〃 14 Gyaku@Kokai b Gyakugi Kokukoma a14 3 (MIOIM) (ffi9-101
! I)〃 17 Transfer rotation 16 1
9 Forward rotation k jE rotation b21 12
(Figure 7) CM6/7-9) 2311
52a 52 1 12 Claw arm Claw arm 52a28
End 67 67 (6th -
7) 29 12.13 68c 68c
(Fig. i6) 30 15 Long dimension Thickness dimension 1570 7s (Diagram 7) #lO Gooley 68 Gooley 69〃 19 Gooley 68 Gooley 6934 8 79a・79
b 7B・7986 15 90
90 (Figure 6.7) # 1 8
ds ds 11. 18 seats 1)〃
End plate 65e Plate 38 4 Above mentioned Above (13 items 40 10 Lower limit Upper limit 1 19 36 34 44 13 Sensor Sensor S5・5645
17 Rolling reduction Vehicle reduction 47 2 65C of 65C and 49 θ
Mode always K t always # 15 104
10353 end 68 6
955 8 slow action 58 1
4 Large size Large size 60 13 Large size Small size 62 8 Motor 16 Motor 8
1 IQ Motor 16 Motor 81 18
Axis 57 Axis 56

Claims (1)

[Claims] (1) A large-capacity paper storage section that can store multiple sheets of cut sheet paper. Two paper conveying parts are connected to the storage part and fit into the paper cassette insertion slot of the forming apparatus. A paper feed mechanism that feeds sheets of paper from the large-capacity paper storage section to the paper transport section one by one. A paper transport mechanism that transports the unfed paper to a predetermined position in a paper transport section and temporarily stops and waits. When there is no paper in the paper transport section, or when waiting paper is fed by the paper feeding means of the image forming device, the paper in the large capacity paper storage section is automatically loaded. Target 1
A paper feeding device characterized in that the above-mentioned paper feeding mechanism and the paper transporting mechanism are operated in conjunction with each other so that the paper transporting section 1 (standby) is fed out and transported.