JPS5978029A - Paper feed device - Google Patents

Abstract

PURPOSE:To make it possible to prevent trouble in the cutting of a feed roller, by rotating a paper transfer mechanism side conveyor roller which is made into contact with a paper feed means on the side of an imaging device, through a friction switch to feed out the next paper and to make it standby. CONSTITUTION:When the rotation of a feed roller on the side of a main machine B causes a paper standing by and held between conveyor rollers 68a, 68b to be fed and therefore, to be detected, a paper feed roller 40, and conveyor rollers 57, 68a are driven to feed out the next paper which therefore, stops and stands by. Due to the provision of a friction clutch mechanism 69 disposed between the shaft 67 of the conveyor roller 68a and a timing pulley 68 for driving the former, even if the conveyor roller 68a is dirven by the timing pulley 68 in the case of a main machine side feed roller being stopped with no paper, the friction clutch mechanism 69 slips due to friction between both rollers, so that trouble in the cutting of the main machine side feed roller caused by forced rotation of the roller 68a, may be prevented.

Description

[Detailed description of the invention]

The present invention relates to a paper feeding device for an image forming apparatus or the like. For example, an image forming apparatus such as an electronic or electrostatic photocopier or a simple printing machine generally uses a paper cassette insertion method for feeding paper. This is done by inserting and setting a paper cassette containing cut-sheet paper into the cassette slot of the machine, and pulling the paper in the cassette one by one into the machine by the action of the machine's paper feeding means. This is used to feed paper to the image forming section, and by preparing several paper cassettes each containing paper of different sizes, paper qualities, etc., paper can be easily replaced with the machine by inserting and removing the cassettes. Alternatively, by providing a plurality of cassette slots on the machine side and inserting cassettes into them, there are advantages such as being able to change paper sheets for the machine with a single operation of a selection button. 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 1000 or 2000 sheets, in succession, the paper cassette has a maximum capacity of 250 sheets or 500 sheets. It is cumbersome to have to replenish the paper in the cassette, and the copying process is 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 deck (or tray) mechanism that can store and feed a large amount of paper, such as 0 sheets, at one time, but this deck mechanism is only one of the features built into that model. This is a dedicated mechanism for the image forming apparatus. In view of the above, the present invention enables a general paper cassette insertion type image forming apparatus that does not have a built-in multi-sheet deck mechanism to be able to insert a cassette without connecting a cable (signal line) to the image forming apparatus. By simply physically inserting and connecting like a cassette into the mouth, you can create 20 sheets.
A general-purpose unit-type highly reliable large-capacity automatic feeder that can be widely used in combination with various paper cassette insertion type image forming devices, making it possible to perform continuous copying of large numbers of sheets, such as 00 sheets, without interruption. The purpose is to provide a paper device. A detailed explanation will be given below based on the illustrated embodiment of the apparatus. (1) Schematic configuration of the apparatus of this example and connection to the image forming apparatus (mainly shown in FIGS. 1 to 3) FIG. FIG. The paper feeding device A of this example is broadly divided into: 1) an elevating paper storage stand #9 that can load and accommodate sheets of paper at once; structure and
A paper feeding mechanism that feeds out the stacked sheets one by one from above, a large-capacity paper storage section, and a paper cassette insertion slot 101 on the machine B side that protrudes forward from the upper front of the storage section 1. It consists of a transport/special unit 2 for one sheet of paper that is inserted into the unit, and a control jl11 circuit unit. C is a pedestal on which the machine B is placed, and D is a pedestal for connecting and holding the paper feeder A to the machine B. As shown in the exploded perspective view of Figure 2, this pedestal has a vertical back frame consisting of left and right vertical frame sides 110, 110 and upper and lower horizontal frame sides 111, 111, which are connected to each other by welding, screwing, etc. , a pair of left and right horizontal rails 1 connected by screwing their tips to rear-protruding horizontal lugs 112 formed on the left and right sides of the lower horizontal frame, respectively.
13, 113, a pedestal 114 common to both rails fixed to the lower surface of the rear end of both rails by welding, screwing, etc., and a screw-adjustable floor contact seat 115 provided on the left and right sides of the lower surface of the pedestal. l, 15 and the left and right vertical frame sides of the back frame llO・110
Approximately the center γ? (2) consists of rear protruding bins 116 and 116 for positioning the left and right positions of the sheet feeding device, respectively. Each of the pair of left and right water 1F rails 113 is an upward channel rail with a substantially U-shaped cross section, and its length is longer than the longitudinal dimension of the J-forming plate of the large-capacity paper storage section 1 to the paper feeder. 11
7-117 is a rail groove cover plate 118 which is formed by bending approximately the front half of one of the left and right upward sides of the upward channel rail at a substantially right angle toward the other side.
φ118 is a protrusion formed approximately at the center of the bottom plate surface of each rail, and 119 and 119 are bent pieces at the rear ends of the rails. The above-mentioned pedestal has four outward facing lugs 12 formed at the upper and lower ends of the left and right vertical frame sides 110 of the vertical frame, respectively.
0 respectively to the outer plate stopper 1 on the cassette insertion side of this machine B.
21, 121, and the bedeinital outer plate stopper 122φ122 on that side to align it with each outer plate so that it is firmly positioned and fixed to the machine B and pedicle C. The floor contact seat 115 of the base leg 114 is brought into contact with the floor by appropriately twisting it forward or backward for the machine B and base C of the base. 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 l of the paper feeder A. Near the two right rollers, downward approximately U-shaped positioning members 124 (for example, (made of synthetic resin). To attach the paper feeder A to this machine B, insert the lower surface of the bottom plate of the paper feeder A into the grooves of the pair of left and right horizontal channel rails 113 of the pedestal, which is firmly set on the machine B and pedicle C. Of the four rollers 123, first insert the front left and right rollers, and then insert the downward U-shaped member 12 near the right roller.
4 is fitted onto the upward side of the rail on that side, and the whole is pushed forward to the paper feeding device, and on the way, the front left and right rollers are made to ride over the protrusion 118 of the rail bottom plate, and then pushed further forward. Next, the rear left and right rollers are moved into the left and right rails, respectively, and the downward U-shaped member 124 near the right roller is fitted to the upward side of the rail on that side to push the device A further forward and move the device A further forward. The rollers on the left and right sides are also allowed to ride over the protrusion 118 of the rail. As the paper feeder A is pushed forward, the single sheet transport/special unit 2 that protrudes forward of the paper feeder A moves to the machine B.
It enters into the cassette insertion slot 101 of the pedestal through the two horizontal frame sides 111 of the vertical and back frames of the pedestal. And rear left and right rollers 123
When the paper passes over the protrusion 118 of the rail, the front plate of the large-capacity paper storage section 1 of the paper feeder A comes into contact with the upper horizontal frame side 111 of the vertical back frame of the pedestal and is received, preventing the device A from moving forward further. movement is prevented. At this point, the rear protruding pin 116 for left and right positioning of the paper feeder on the pedestal side has fully entered the corresponding pin entry hole 116a on the paper feeder A side, and the transport number special unit for one sheet of paper feeder A 2 is the cassette slot l of this machine B
It fully enters into the cassette insertion slot 101 to the proper position and becomes fitted into the cassette insertion opening 101. Also, since the device A has climbed over the rear left and right rollers 123 or the protrusion 118 of the rail, it is returned by the protrusion and is stably held directly at the final forward position. Pedestal rail 11 of this paper feeder PJA
The connection of the device A to the machine B is completed by mounting the rack on the device 3 and moving the front slide. To position paper feeder A with respect to machine B, first damage the machine B on the pedestal by a few screws and screw 12 on the outer panel of machine B.
1.121 with high precision, the device A moves forward Irf, and the final position is the device A relative to the upper horizontal frame side 111 of the vertical back frame of the pedestal.
The position of the mounting RA in the left and right direction (direction perpendicular to the rail) is determined by the left and right pins 116 and 116 on the pedestal side.
This is achieved with high precision by the engagement between the pin entry hole 116a on the device A side and the engagement between the rail 113 and the downward U-shaped portions 124 and 124 on the mounting RA side. Note that the pin 116 may be provided only at one location on either the left or right side. The height direction is secured by screw 121φ121 to this machine B on the pedestal;
This is done with single positioning and rail surface. In this way, the cassette of the device A can be inserted into the machine by simply mounting the paper feeder on the pedestal rail 113 and sliding it forward for one minute.
The push-in connection to I', 1101 is made with precision and without any hindrance. Also, after connecting paper feeder A to the above machine, four rollers 1
23 are both located in the portion of the rail 113 where the cover plate 117 exists, and the floating movement of the device A from the rail is prevented. When clearing a jam in the cassette loading go 101 of this machine B, when the paper is being fed while connected to the machine B, move the rear left and right rollers 123 of A over the rail protrusion 118. The slide rests on the rail until it abuts against the stopper piece 119 at the rear end of the rail, and the slide is moved backward. Then, the single-sheet conveyance/special unit 2 of the device A is removed from the cassette insertion Cll0I of the wooden board B, and the jam can be easily cleared. After clearing the jam, if device A is pushed forward along the rail, device A will be connected to wooden board B again. The wooden board B in the illustrated example has paper cassette insertion slots in two stages (top and bottom).
2.101, and in this example, the single sheet transport/special unit 2 of the paper binding device A is fitted and connected to the lower cassette insertion $r+101. If necessary, leave the upper cassette (E) inserted and switch the paper feed to the upper cassette by pressing the paper selection button on the B side of the machine, then feed the paper in the cents into the B side for use. can. Instead of hooking the lower end of the vertical back frame of the pedestal to the pedisc C with the screw 122, a hook is formed, and the hook is hooked to the horizontal beam on the back of the pedicle bottom plate to hang (2) y descending type paper. The storage platform mechanism 3ae3b*3ce3d (Figures 4 to 6) has a bottom plate and
A horizontally long φ vertically elongated chassis consisting of a combination of four panels: a front panel, a right panel, and a left panel, with the rear and top surfaces open, 4-4.
(ffi7-9 diagram) shows chassis right side plate 3C and left side plate 3
Channel rails with a substantially U-shaped cross section are arranged vertically on the front side of each inner surface of d, and 5 is a paper storage table. 6 is fixed and on the outside of each plate 6 -1-Tm pairs of rollers 7ψ7 are attached.
．． It is attached to the shaft. Then, the rollers, one pair each on the left and right, are fitted into the grooves of the two left and right vertical channel rails 4, 4. Therefore, the paper storage stand 5 is connected to the rail 4.
It is free to move up and down along line 4. Reference numeral 8 is a motor for driving up and down the paper storage table (hereinafter abbreviated as lifter morph), which is mounted on the inner lower part of the chassis right side plate 3c (=J), and the rotation of the motor shaft is controlled by a reduction gear box 9 (
The final shaft 10 of the reduction gear box is used as a drive shaft to project from the inside to the outside of the chassis right side plate 3C, and a sprocket 11 is fixed to the projecting end. 12 and 13 (Figs. 6 and 8) - left and right chassis side plates 3
Two parallel wooden rotating shafts are arranged with bearings between the lower corners and the upper corners of the front side of d. l-14@
14.15-15 are fixed and arranged. The sprocket 15◆15 may be free to rotate with respect to the shaft 13. The right end of the lower rotating shaft 12 is extended to protrude outside the chassis right side plate 3C, and a sprocket 17 is attached to the protruding shaft via a one-way clutch (spring clutch) 16. . 18 is a chain suspended between the sprocket 11 of the drive shaft IO and the sprocket of the outwardly protruding end of the lower rotating shaft 12; 19; 19 is the parallel rotating shaft 13 of the two upper and lower shafts;
- A pair of left and right vertical chains suspended between the left sprockets 15 and 14 and between the right sprockets 15 and 14 of 12, respectively, and the left and right vertical chains 19 and 19
A part 19a (Figs. 6 and 8) is inserted into the chassis through the left and right longitudinal slit holes 3e and 3e formed in the chassis front plate 3b by extending the tips of the left and right side plates of the storage stand 5, respectively. It is firmly locked and connected to the arm plate 5a exposed to the outside of the front plate 3b. When the lifter morph 8 is driven in normal rotation a (Fig. 4), the rotational force is transferred from the sprocket gears 1 and 11 to the chain 18. → Sprocket 17 → Transmitted to the lower rotating shaft 12 via the one-way clutch 16, and thereby the left and right longitudinal chains 19
-19 Rotate the platform 5 in the upward direction so that the platform 5 moves to the rail 4.
・At 4, move up R with tC). On the other hand, when the sprocket 17 is driven in the reverse direction, the direction of rotation of the sprocket 17 is in the direction in which the one-way clutch 16 rotates idly, and although no positive reversing force is applied to the car 12 due to the reverse drive of the motor 8, the one-way clutch 16 is rotated in the idling direction. The left and right vertical chains 19, 19 due to the self-gravity of the joint 5 side,
Sprocket 15 @ 14.15φ14, upper and lower rotating shaft 1
3 and 12 rotate in the opposite direction, and the platform 5 rests on the rails 4 and 4 and moves downward. 20 (Fig. 1O) After the rotating shaft of the beam lid motor *11A
The gear disc 21 of the motor brake is fixed to the gear disc, and 21 is a pawl plate that is always biased by a spring in the engaging direction with respect to the gear disc, and moves away from the gear disc 20 by energizing the electromagnetic suction device 22. . 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 rotate forward and reverse. On the other hand, outside the above-mentioned period, idle movement of the motor shaft is prevented by the engagement of the pawl plate 21 with the gear cutting disc 20. This prevents the platform 5, which is in the mid-lift position of the vertical rails 4, from sliding down by itself due to the gravity of the platform and the paper P loaded thereon, causing the rotary shaft of the motor 8 to idle. 5 is stably held in the lifting position. 23 (Figs. 7, 11, and 12) is a rocking lever for paper detection in the shape of an abbreviated Mi face, which is rotatably held on a bearing inside the upper corner of the front side of the chassis right side plate 3C. A downward l-th protrusion 23a provided at the tip of the 1st protrusion 23a, and a second protrusion 23 that also faces downward but has a shorter protrusion length than the first protrusion 23a.
b, and the third protrusion 2 provided in the middle of the lever 23 and facing toward one person.
3c, and a protrusion 23d provided at the base of the lever. The first downward protrusion 23a comes into contact with two surfaces of the topmost paper of the stacked papers P on the table 5. The second protrusion 23b is the base 5-
When the last sheet of paper No. 1- is fed and the I-th protrusion 23a falls into the through hole 5b on the stand 5 side, it hits the upper surface of the stand 5 on the way and prevents the lever 23 from further tilting and turning. act. The third 4-direction protrusion 23C is 16 on the chassis front surface 3b.
Detection sensor S2 for detecting excessive brightness on the top surface of paper installed on the inner side of the side
is facing. The fourth bidirectional protrusion 23d is the chassis
It is located on the optical path of the bell sensor S1, facing a photoelectric sheet consisting of a light source and a light receiving element arranged at the 1- position of the /14 portion of the lever 23 on the inside of the right side plate 3C. Therefore, the upper surface position of the stacked storage paper P on the table 5 is set at a predetermined value.
When the surface level is within the surface level range PH-PL (FIG. 12), the lever 23 is held in a substantially horizontal posture within a certain tilt angle range α due to the contact of the first downward protrusion 23a with the upper surface of the paper, and the fourth The upward protrusion 23d blocks the optical path of the photoelectric sensor S1. 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 later-described paper feeding mechanism, the top surface position of the loaded 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 becomes completely open and the position of the top surface of the stacked sheets has decreased to the lower limit level PL. Based on this signal, the above-mentioned 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 then the lift motor 8 is energized in the normal rotation a direction. As a result, the table 5 moves upward, and the entire stack of sheets P is moved upward. Due to this lifting movement, the upper surface of the stacked paper P is placed upward. Along with this, the lever 23 in the inclined position returns and rotates, and the sensor 31
optical path is blocked. After a predetermined period of time has elapsed since the optical path cutoff signal, the lifter motor 8 is de-energized via the control circuit, and then the electromagnetic suction device 20 is de-energized. In this way, when the stacked paper P on the table 5 is consumed, for example, about 20 to 30 sheets iσ, the upward movement of the table 5 as described in -1- is automatically executed intermittently and the upper surface position of the stacked paper P is leveled. is always maintained at a predetermined tolerance level PH~PL. As consumption of stacked paper P progresses, table 5 also repeats intermittent pegging, and at some point the top surface of the fifth block falls within the level range PH-PL of stacked paper, and the last one on table 5. When a sheet of paper is fed, the first downward protrusion 23a of the lever 23
falls into the through hole 5b formed in the stand 5, until the downward protrusion 23b of the ijs 2 hits the top surface of the stand 5 and is received.
The downward protrusion 23d is completely removed from the optical path of the sensor Sl. The signal from sensor St at this time,
Before that, it is detected that there is no more paper on the table 5 based on a signal from a rising motion upper limit position sensor S3 of the table 5, which will be described later. 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 upper H movement upper limit position fi sensor (for example, a microswitch) and the lower movement lower limit position sensor (the same) of h5, which are disposed at the upper and lower end positions of e. The platform 5 is intermittently and sequentially moved up A as described above, and when the - side of the platform 5 itself reaches the lower limit level PL of the paper level range, the R lowering chain of the platform 5 is reached. The protrusion 5C formed on the locking connecting arm 5a is the 1st limit Oka sensor S.
3, it is detected that the platform 5 has reached the 1-limit position, and the signal is input to the control circuit. At this point, some paper P still remains on the platform 5, and after all the remaining paper is fed, a paper out signal from the sensor S1 based on the large inclination αLL of the lever 23 is sent to the control circuit. is input. 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 paper over-up detection sensor S2 will be described later. (3) The single sheet feeding mechanism 24 (Figs. 5 and 6) is equipped with a 10 paper feeding motor (hereinafter abbreviated as paper feeding motor) which 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 project from the inside to the outside of the chassis left side plate 3d, and the first timing pulley 27 is fixed to the projecting end. It is. 28 (Fig. 5Φ13) is a pin shaft installed on the upper outer surface of the chassis left side plate 3d, and the second timing pulley 29, first gear 30, and encoder gear cutting disc 31 are concentrically attached to this pin shaft. The integrally connected parts are rotatably supported, and a timing belt 32 is suspended between the first timing pulley 27 and the second timing pulley 29. Therefore, when the paper feed motor 24 is rotationally driven, the three-part pulley 29, first gear 30, and gear cutting disk 31 are also rotationally driven. 33 (Fig. 6-7'-11-13) is the left and right chassis.
A paper feeding support shaft is disposed on the second part of the side plate 3de3c so as to be rotatably supported between both sides 3d and 30, and the left end of the support shaft is extended to protrude outside the chassis left side plate 3d, This protruding shaft has a one-turn clutch, a spring clutch 34 and a second
Gear 35 is installed. The second gear 35 is the first gear
It meshes with gear 30. 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 31a of the outer ring, so even if the first gear 30 rotates, the second gear 35 The shaft 331 only rotates idly, and the shaft 33 is not driven to rotate. When the first electromagnetic suction device 36 is momentarily energized and the outer ring is unlatched by the claw arm 37, the second gear 35 and the shaft 33 are coupled together by the clutch-on, and the shaft 33 is rotationally driven. Ru. When the shaft 33 rotates approximately one turn and the protrusion 34a of the outer ring is once again engaged with the claw arm 37, the clutch is turned off and the second
The gear 35 becomes free to rotate on the shaft 33, and the shaft 33 stops rotating. That is, the paper feed support shaft 33 is intermittently rotated one rotation each time the first electromagnetic device 36 is momentarily energized. 38/38 (Fig. ffi7) has a substantially downward U-shaped cross section with the shaft 33 restricted to move in the longitudinal direction at two places on the left and right of the paper feed support shaft 33, the base supported freely in rotation, and the tip side facing forward. a paper feed roller support arm 39, a paper feed roller shaft rotatably supported by bearings at the ends of the pair of left and right arms; 40 a paper feed roller mounted at several locations on the shaft via one-way clutches 41; 40a is also a weight roller fixed to the shaft 39, 42a is one arm 1 of the paper feed roller support arm 38038, a timing pulley fixed to the paper feed support shaft 33 portion in the base channel, and 42b is a timing pulley fixed to the paper feed support shaft 33 portion of the paper feed roller support arm 38038. I on the paper feed roller shaft 39 part in the tip side channel.
i! The timing pulley 42c that arrived at Z1 is a timing belt suspended between both pulleys 42a and Φ42b. 45. 45 is the stacked paper P lifted and supported by the stand 5.
These are single-sheet separation claws that touch the left and right corners of the leading edge side of the top surface of the paper. These left and right separation claws 45 are connected to a fixed reference side plate 88 and a movable side plate 8 for regulating the side of loaded paper, which will be described later.
6 at the upper corner of the front side. Therefore, as the paper feed support shaft 33 is driven one rotation, i'lA
During one rotation of ib 33, pulley 42a → timing bar, lever I/42c → pulley 42b + paper roller shaft 39 →
The paper feed roller 40 is rotationally driven in the paper feeding direction via the one-way clutch 41, and a feeding force is applied to the topmost paper of the stacked papers P, so that only one paper is separated from the separating claws 45 and 4.
5 and is sent forward. Way I roller 40a is the paper feed roller 40 that loads paper.
It works by applying a moderate amount of force to the two surfaces to keep them in constant pressure contact. 46 (FIGS. 5 and 13) is a third gear (idler) rotatably held by a pin shaft implanted on the outer surface of the chassis left side plate 3d, and is meshed with the first gear 30. 47.50
is the chassis - left side plate 3d and auxiliary side plate 48 (Figures 147 and 8)
A fourth gear and a clutch (spring clutch) 51 are attached to a shaft 49 which is rotatably supported by a shaft 49, and 51 is an outer ring of the clutch 50, and has fine teeth formed on the outer peripheral surface. The fourth gear 47 is bleached with the third gear 46. Reference numeral 52a is a second electromagnetic suction device that swings a claw arm applied to the rear gear cutting outer ring 51. When the second electromagnetic suction device 52 is not energized, the pawl arm 1.52a is held by a spring in a state where it escapes from the gear cutting rear outer ring 51 of the clutch 50. Therefore, in this state, the clutch 50 is in the on state. The fourth gear 47 is connected to the car 49. On the other hand, when electricity is applied, the clutch 50 is held off by the gear cutting rear outer ring engagement of the claw arm 52a, and the fourth gear 47 is held free of rotation relative to the shaft 49. 53 is a fifth gear fixed to the shaft 49, and 54 is the fifth gear.
t56 gear (idler) meshed with the gear, 55 is the sixth gear
This is a conveyor roller shaft gear (F37 gear) that meshes with the gear. 56 (Fig. 6Φ7, 13) is the first conveyance roller shaft, which is formed by extending and protruding the upper corners of the front sides of the left and right side plates 3d and 3C of the chassis forward, respectively. A bearing is freely rotatably held between the shafts 56 and 6, and the conveyance roller shaft gear 55, which is the seventh gear, is fixed to the left end of this shaft 56.
It's only t. Reference numeral 57 denotes a first conveyance roller attached to this shaft 56 via a one-way clutch 58, and 59 (Figs. 6 and 14) denotes a driven valve that is brought into contact with two surfaces of each conveyance roller 57 with an appropriate pressing force. It's Laura. The shaft 60 of the driven valve roller is connected to a pair of projections 63 and 63 formed on the left and right sides of the upper guide plate 61 of a pair of upper and lower paper kite plates 61 and 62 disposed between the paper feed roller 40 and the transport roller 57. The driven valve rollers 59 are rotatably attached to this shaft 60 (=j). Each driven valve roller 59 is inserted into the lower side through a notch hole formed in the upper guide plate 61. It is in constant contact with the upper surface of each conveyance roller 57. When the paper feeding motor 24 is being rotated and the second electromagnetic suction device 52 is not energized, the clutch 50 is on, so that the motor 24 is not energized. The rotation of the first gear 30 accompanying the rotation is the third
Gear 46 → 4th gear 47 → clutch 50 → shaft 49 → 5th
11th on the path of gear 53 → 6th gear 54 → 7th gear 55
The signal is transmitted to the Jt2 feed roller shaft 56, and the 1111th it feed roller 57 is rotationally driven in the paper feeding direction. Further, as the roller 57 rotates, the driven valve roller 59 also rotates. On the other hand, when the second electromagnetic suction device 52 is energized, the fourth gear 47 rotates the shaft 49-1: due to the force with which the clutch 50 is turned off, and the shaft 49 is not rotationally driven. That is, I S l 4flit
The feed roller 57 is not driven to rotate. (4) The single-sheet conveyance/special unit 2 65 has its base connected to the first conveyance roller shaft 56 and protrudes forward from a portion of the chassis front plate 3b of the large-capacity paper storage section 1. This is a flat box-shaped transport unit base. The width and thickness of this flat box-shaped base almost match the width and thickness of a thin paper cassette for accommodating 250 sheets, and the length is greater than the depth of the cassette slot on the B side of the machine. It is also slightly longer in size. Further, the flat box-shaped base body is free to swing about the first conveying roller shaft 56 from a substantially horizontal position to a downward position of approximately 100 degrees forward (Fig. t54). Therefore, when the cassette slot on the machine B side to which the paper feeder A is connected is for a thin paper cassette for accommodating 250 sheets, the paper 1 mainly composed of the flat box-shaped base 65 is inserted into the cassette slot.
The sheet transport/special unit 2 inserts the cassette and simultaneously inserts the cassette. In addition, since the base body 65 has a degree of freedom in swinging around the shaft 56 as described above, the conveyance/special unit 2 for one sheet of paper
Force setting〉・1・Even if there is a slight deviation in the angle of approach when entering the insertion slot, the deviation will be naturally corrected as it approaches, and eventually the paper will be transported to a single sheet. N
40 in the correct position and posture. 6th row 66 (4th and 5th (61) ), in order to adapt the above-mentioned thin single-sheet transport unit 2 to the cassette insertion 1:1101, screws I are installed on the outer surfaces of the left and right side plates 65aΦ65b of the flat box-shaped base 65, respectively, near the tips.
This is a removable downward slanted cam-shaped spacer plate that can be used as a separate piece. That is, in this case, when the rails 113 and 113 are fixed and pushed forward to connect the paper feed device to the machine B, the above-mentioned left and right extra surface force 1 is applied to the left and right edges of the cassette insertion slot 101.
・Abut the front wound surfaces 66a and 66a of the shaped spacer plate (
tr < 15 fig.). Even after this contact, paper feeder A continues to
If you do not push and move the slopes 66a and 66a will insert the cassette.

[
The shaft 5 is moved along the lower edge of the Lot and attached to the flat box-shaped base 65.
An upward rotational force centered at 6 is applied. As a result, as the sheet feeding device A is pushed, the inclined cam plate-shaped spacer plate 66
- Due to the lifting action of the base body 66, the posture of the base body 65 naturally changes to a substantially horizontal direction, and the tip smoothly enters the inside of the cassette I/insertion opening lO1, and then the spacer plates 66, 6
The lower end of the cassette inserter 6 is transferred to the bottom plate surface of the cassette inserter 101, and the base 65 is raised to a substantially horizontal position and enters the cassette inserter. Therefore, whether the cassette insert 101 on the side of the machine B is for a thin paper cassette for accommodating 250 sheets or for a thick paper cassette for accommodating 500 sheets, the final paper feeder A is used.
The general transport φ special unit 2 for one sheet of paper is placed in the cassette slot on the B side of the machine, and the second
The upper surface of the conveyance roller 68a 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 on the side of the machine B, and also protrudes forward from the front plate of the base 65. Specify the paper size to be used, which will be described later. The cam plate is inserted into a state in which it selectively contacts the paper size detection switch group 104 on the side of the machine B, and the machine B and the paper feeder A are properly connected (FIG. 1). Reference numeral 67 denotes a second conveyance roller shaft disposed inside the front end side of the flat box-shaped base 65, and the shaft 67, which is parallel to the first conveyance roller shaft 56, has both left and right ends thereof connected to the base 65, respectively. Longitudinal long holes 65e (
Fig. 16), the bearing 6 fitted in the two lower slides can move freely.
The bearings 67a are rotatably mounted on the bearings 67a, and are normally biased upward by a pair of left and right lifting spring plates 67b (Fig. 7), so that the bearings 67a and 67a are held in the -L of the elongated hole 65e.
He was held up until he was caught at the end. 68a and 68b (Figure 7, Figure 14) are a plurality of second conveyance rollers attached to the second conveyance roller shaft 67 shown in -. 68a is attached to the shaft 67 via a one-way clutch 68C, and 68b is attached to the shaft 67 so as to rotate freely, and is a roller having a slightly smaller diameter than the roller 68a. J of each of the 21st R2 feed rollers 68a and 68b in 2:
. The surface is exposed to the outside through a through hole formed in the front end side surface of the top plate 65c of the base body 65. When paper feeder A is connected to this machine B, each of the rollers 68a1168
b is a freely rotating roller 103a (for example, an acetal roller) of each paper feed roller 103 (made of rubber) on the B side of the machine (Fig. 1).
The roller 68a is located corresponding to the lower surface of the roller 103a.
FFI 2411i1 feed roller shaft 67
68ae and 103a are pressed into contact with each other due to the reaction force of the spring plate due to the sinking. Since the roller 68b has a slightly smaller diameter than the roller 68a, it faces the lower surface of the freely rotating roller 103a of the corresponding paper feed roller 103 with a small gap therebetween. 69 (Figs. 7 and 17) is a timing pulley provided approximately in the middle of the second conveyance roller shaft 67 so that it can rotate freely, 69a is a left thrust stop of the pulley, and 69b is a right thrust stop I.
- The distance between the thrust stops 69a and 69b is larger than the length of the pulley 69. 69c is a washer loosely fitted to the shaft 67 on the right side of the pulley 69;
d is a coil spring compressed between the washer 69c and the left thrust stop 69b. Therefore, the pulley 69 is always biased toward the left thrust stop 69a via the washer 69c by the coil spring force, and is pressed into the state between the left last stop 69a and the washer 69c, and the pulley friction retention/slip mechanism ( A friction clutch mechanism) is constructed. 70 is a timing pulley fixed to approximately the middle IN of the first conveying roller shaft 56 in correspondence with the pulley 69 shown in "-";
71 is a timing belt suspended between this pulley 70 and the second conveyance roller shaft 67. Then, when the first conveying roller shaft 56 is rotationally driven, the pulley 70 → bells 1 and 71 → pulley 68 → pulley jγ friction holding force of the friction clutch mechanism → second +112 feed roller 4MI+ 67→The rotational force of the one-way clutch 68c is transmitted to the second transport roller 68a, and the roller 68a is rotationally driven in the paper feeding direction. If the roller is larger than the above, the first conveying roller shaft 56
Even if the ff12 is being rotated, the pulley 68 on the conveyance roller shaft 67 side of the ff12 is stuck to the left thrust stop 69b and the washer 69.
Resisting the frictional force between shaft 6 and c, slip rotation occurs and shaft 6
7 and the second conveying roller 68a is not forcibly rotated. The effect will be explained in a separate section.673 (Fig. 7φ14) is a flat box-shaped base 65 whose base is supported by bearing pieces 65f and 65f formed at the base of left and right side plates 65a and 65b by extending the side plates upward. A drainboard-shaped paper guide plate is provided so that it 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 face plate 65c and the guide plate 73 on the base body, from the first conveyance roller 57 to the second conveyance roller 68a and 68b. 74 (Figs. 7 and 18) is a cam plate array for specifying the paper size to be used, which is arranged in the space on the front end side of the flat box-shaped base 65.
Of the various size scales 76 (Fig. 16) displayed on the dial surface by manually rotating the size dial 75 (Fig. 16) provided exposed on the outer surface of the right side plate 65b, the paper storage section l
When the scale of the paper size loaded and stored on the table 5 is aligned with the index 77, the cam protrusions of the combination corresponding to the size are inserted into the front plate 65d from the through holes formed in the front plate 65d of the base body 65.
It will be in a state where it protrudes forward. Instructing the paper size to be used by operating the dial must be done or confirmed before connecting the paper feeder A to the machine B. The cam plate protrusion that protrudes forward from the base front plate 65d in response to the specification of the paper size to be used using the dial detects the paper size to be used on the machine B side when the paper feeder A is connected to the machine B as described above. The switches in switch row 104 are selectively put into a suppressed state. As a result, the paper size conditions to be used are automatically set in the control circuit of the machine B side. 78a to 7-8k (FIG. This will be explained in a separate section. S5 and S36 (FIGS. 6 and 7) are the first conveyance rollers 57 between the first conveyance roller 57 and the second conveyance roller 68a@68b, respectively.
if and a second paper sensor (for example, a microswitch) arranged at two positions at the offset position (I! # and approximately the middle position)
Then, they are supported by the base body 65 via a sliding support member or the like so that they can be moved and adjusted in the direction between fjSl and the second conveying roller as necessary. (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 held on the outer surfaces of the chassis left and right side plates 3d and 3C as printed circuit boards 79a and 79b (FIG. 4.psi.5). A transformer and the like are arranged on the chassis bottom plate 3a, but are omitted from the diagram. 80/81Φ82 (Fig. 6 and 7) is the front plate 3 of the chassis.
b. Right side plate 3Cψ This is a decorative plate that hides the outer surface of the left side plate 3d, 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 (Figures 5 and 7). This box-shaped door 85 is made of transparent or colored transparent synthetic resin, so that even when the door 85 is closed, the stack of paper on the table 5 inside can be seen. MS (FIGS. 1 Φ8 and 9) and LED are a main switch and an indicator lamp arranged on the -L side of the decorative panel 81 relative to the chassis right side panel 3c. S7 (Figures 1 and 4) is a joint switch that detects when paper feeder A is connected to machine B, and is fixedly located near the front side of the chassis right side panel 3C. It is shi. When the paper feeder A is connected to the machine B, it is pressed by the tip of the positioning pin 116 on the seat side of the paper feeder pedestal that is fitted into the positioning hole 116a on the paper feeder A side, turns on and maintains that state. The fact that paper feeder WA is connected to machine B is input to the control circuit. S8 (Figs. 1, 4.7 to 9) is a door switch supported via a swing lever 89 near the rear side of the chassis right side plate 3C. When the door 85 is closed, the door 85
The door 8 is pressed by the protrusion 85b and held in the on state.
5 is opened, it is turned off, and the door close signal or door open signal is input to the control 111 circuit. However, this door switch S8 is only activated when the decorative plate 81 of the chassis right side panel 3C is attached and the top cover 83 is closed. (omitted) is positioned and held at a position where the protrusion 85b of the closed door 85 acts. When the decorative plate 81 is removed or the two lids 83 are opened, the switch S8 is held in a position away from the door protrusion 85b (as shown by the two-dot chain line in FIG. 4) even when the door 85 is closed. It does not turn on. 90 is the flat box shape of the special equipment section 2 for transporting one sheet of paper (body 6
5 is a light source lamp disposed in correspondence with the paper-out detection light receiving element Cds disposed inside the bottom plate of the set inserter 101 on the machine B side. When the lamp 90 is turned on, its light passes through a hole in the bottom plate 65e of the base 65 and a hole in the bottom plate of the cassette insertion slot 101, and enters the light receiving element CdS. 86 (Figs. 7 to 9) is a movable side plate supported on the inner surface of the left side plate 3d so that its position can be changed freely via brackets 87. 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 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 sheets P are stacked and stored on the stand 5 between the movable side plate 86 and the fixed reference side plate 88, which have been adjusted in the above position, with the front surface of the stacked sheets abutting against the inner surface of the chassis front plate 3b. The stand 5 has a substantially two-part structure consisting of a front half plate 5d and a rear half plate 5e (see Figures 6 and 7), and the latter half plate 5e can be freely attached to and detached from the front half plate 5d. (6) Operation (sequence) Figure 22 shows the overall flowchart of device operation 1 and 2.
Figure 3 mainly shows the operation flowchart 1 of the A descending paper storage mechanism, and Figure 24 mainly shows the flowchart of feeding, transporting, and transporting a single sheet of paper.
Flowchart of operation of standby mechanism I. FIG. 25 is a drive timing chart of the beam lid motor 8. a. Mount the paper feeder A on the rail 113 on the pedestal several times above the machine B as described above, turn the paper size dial 75 to align the scale 76 of the paper size to be used with the index 77, and then turn the paper feeder A onto the rail 113 of the machine B. Connect A to machine B. This causes the joint switch S7 to turn on 21B. Further, the paper size conditions to be used are input to the control circuit of the machine 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. When the door 85 is opened to store paper, the door switch S8 is turned off, and in response to this signal, the electromagnetic suction device 22 of the lifter motor 8 is energized and the motor is released from the hook plate 21. The release radius motor 8 is energized in the reverse direction. This causes the paper storage table 5 to move downward. When the protrusion 5c on the platform 5 side comes into contact with the platform lowering position detection sensor S4 during the downward movement of the platform 5, the sensor S4 is turned on. The power to the lifter motor 8 is cut off by this ON signal, and after a period of time (motor stop time) in which the motor stops almost completely, the power to the electromagnetic suction device 22 is cut off and the claw plate 21 engages the motor 8. The stand 5 is stopped and held at the lower limit position. If the previously used paper is stored on the stand 5 and is of a different size from the one to be reused, remove it, and then open the lid 83 and remove the movable side plate 86 this time. Reset the paper at a position 15 times larger than the paper size you are using. 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 that signal energizes the electromagnetic suction device 22 of the lifter motor 8 to release the motor, and then energizes the motor 8 in the forward rotation direction, causing the table 5 to rotate. move twice. d. As the platform 5 moves up, the upper surface of the stacked sheets P eventually reaches the lower limit level PL of the two-side level range PL-PH. At that point, the optical path of the sensor Sl is blocked by the fourth upward protrusion 23d of the lever 23. A predetermined set timer time (from the time of that signal)
The power supply to the motor 8 is cut off after the elapse of the time it takes to almost reach the limit level PH due to the upward movement of the motor, and then, after the motor stop time has passed, the power supply to the electromagnetic suction device 22 is cut off, and the table 5 It is stopped and held in one position. 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. Same as this 11'? As a result, the first electromagnetic device 36 is momentarily energized, the one-rotation clutch 36 is turned on, and the paper feeder lll11133 is driven one rotation. At this time, while the first electromagnetic device 36 is 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. Also, based on the fact that the paper sensor s6 does not detect the presence of paper at t52, the power supply to the second electromagnetic suction device 52 is cut off. As a result, the clutch 50 is turned on, and It and the second conveyance rollers 57 and 68a are also driven to rotate along the rotational force transmission path described above. Then, the rotation of the paper feed roller 40 feeds the top paper of JJ+[war paper P, and the paper passes over the tip fgB side air release claw 45 and is sent out to one sheet. It is bitten between the first W feed roller 57 and the driven presser roller 59, and is interposed between the two-sided plate 65c and the seven-saw-shaped paper kite plate 73. It is conveyed through the passage toward the tip of the base body 65. During this conveyance, the rotation of the paper feed roller 40 ends, but the fed-out paper continues to be conveyed by the rotation of the first JIS feed roller 57 and the presser roller 59. Even after the active drive is cut off, the paper feed roller 40 continues to be activated by the one-way clutch 41 due to the moving force of the paper being conveyed.
The shaft 39'2 is rotated idly through the shaft 39' to reduce paper conveyance resistance. f, the paper that enters the gap path between the face plate 65c and the guide F plate 73 on the base body 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 103 on the side of the machine B that is in contact with it
The rollers 68a and 11tff are caught between 3a and 68a.
103a and Jib 67, it passes smoothly without getting caught between the 24m feed roller 68b, which is freely rotatable, and the roller 103a on the paper feed roller side, which faces the roller 103a with a small gap therebetween. When the base body 65 moves forward and reaches the reference line 0-O (FIGS. 7 and 14) near the tip edge, the first conveyance roller 57 and the second conveyance roller 68a interlocked therewith stop at the timing when the conveyance movement stops. The conveyance is stopped by stopping the rotational drive of. The driving of the first and second tl12 feed rollers 57 and 68a is 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 At the time of detection by the second paper sensor S6, the encoder gear cutting disc 31 and the photoelectric element 31a (13a!
) starts counting the number of pulses, and when a preset number of pulses is counted, the second electromagnetic device 52 is energized, the claw arm 52a engages with the rear outer ring 51 of the clutch 50, and the clutch 50 is turned off. It is done by being made. The number of pulses in -1- is determined based on the paper conveyance speed, the distance from the second paper sensor S6 to the base line O-0, and the
It is calculated from the paper movement amount based on the inertial rotation of both rollers 57, 68a after the rotational drive of the conveyance rollers 57, 68a is cut off, and is set in advance in the control circuit. The set number of pulses can be corrected later as necessary. Further, after it is detected that the leading edge of the paper has passed through the second paper sensor S6 position, the paper-out lamp 90 is turned off, and the indicator 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 0-0 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 first conveyance roller 57, and if it is a large one, it has not yet been removed from the paper feed roller 40. Therefore, in any case, when the paper is on standby, both the first and second paper sensors are held in the ON state IE due to the presence of the waiting paper. - The paper feed roller 103 on the RB side waits until the predetermined timer time (at least the paper refeeding time for continuous copying on the machine B side or more, for example, about 1 to 2 seconds) elapses when the waiting paper is fed. If re-conveyance is not performed by the timer, the power to the conveyance motor 24 on the paper feeder A side is temporarily cut off to save electricity when the timer time elapses, and when the motor stops (approximately 2 seconds), The power supply to the second electromagnetic device 52 is also cut off, and it stands by in the paper feeding/conveyance stop state IE. g, Tree a When the paper feed roller 103 on the B side is driven to rotate based on the sequence program on the machine B side, the leading edge of the waiting paper is transferred to the second transport rollers 68a and 68b and the paper feed roller 1.
03, 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 tying device A side, the first and second
Although the conveyance rollers 57 and 68a are not actively rotated, each roller 40* 57 e 68
Since all a are attached to each support @h39-56-67 via one-way clutches 41-58 and 68G, they all 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 end string of the paper passes the position of the first paper sensor S5 as the waiting paper is pulled toward the side of the machine B, the sensor S5 is turned off, and based on the signal, the transport mode is turned off.
When the clutch 24 is stopped, the motor is energized, and when the second electromagnetic device 52 is de-energized, the device 652 is energized (therefore, the clutch 50
(hold off). Next, the instantaneous current is extended to the first electromagnetic device 436, and the one-turn crank 34 is turned on, and the paper feed shaft 3 is turned on.
The paper feed roller 40 is rotationally driven by one rotation drive of No. 3. 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 transport roller 57 and the paper feed roller 40 until the paper is received by the paper feed roller 40 and the rotation of the paper feed roller 40 is completed. When the trailing edge of the preceding paper passes through the second paper sensor S6, the sensor is turned off 7, and based on the signal, the power to the second electromagnetic device 52 is cut off and the clutch 50 is turned on. The rotational drive of the first and second conveyance rollers 57 and 68a is started. As a result, the next sheet of paper is introduced into the sheet conveyance gap path between the top plate 65C of the base body 65 and the drainboard-shaped sheet guide plate 73 so as to follow the previous sheet. When the leading edge of the paper passes the position of the second paper sensor s6, the switch s6 is turned off, and based on the signal, pulse counting by the encoders 31 and 31a is started, and a predetermined number of pulses is reached by the second electromagnetic device 52. By energizing the clutch 50 and turning off the clutch 50,
When the leading edge of the next paper is aligned with 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 drawing speed inward is relatively fast, and the trailing 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. Transported by rotational drive. i.'' The next paper in the standby state is introduced into the machine B by re-rotating the paper feed roller J, 03 on the machine B side. j, and from then on, every time the paper feed roller 103 on the B side of the machine is driven to rotate, the paper feeder A side introduces the waiting paper of gh·i into the machine. The cycle of sheet conveyance and standby is automatically repeated. k, stand 5] The second loaded paper P is, for example, 20 to 30 sheets.
When the paper is consumed, the n level of the top surface of the paper drops to the lower limit PL of the allowable range. Then, as described above, the drop is detected by the level sensor Sl, and the table 5 moves up A, and after a certain period of time, the upward movement is stopped. At this time, the upper surface of the paper has almost reached the upper limit level PH. The paper feed mechanism that feeds the topmost paper of the stacked paper P to the edge of one sheet on the top A of this table 5 is such that the standby paper in the special equipment section 2 is fed to the paper feed roller 103 on the machine B side.
The paper is delivered to the special equipment section 2 by the 4σ conveyed by the rotation of the paper. Thereafter, each time the paper level decreases to the allowable lower limit PL as the paper is sequentially consumed, the second raising movement of the table 5 is automatically executed intermittently, and the paper on the table 5 is raised to the top n level of the stacked paper P. The consumed amount is always maintained at a predetermined tolerance level PH-PL. In this way, a large amount of paper P, for example 2,000 sheets, stacked on the table 5 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.
Side paper feeding means] Even if the paper pull-in triple If by 04 changes due to changes in magnification, etc., the same speed may vary depending on the model.
Even if the sheets are different, the sheets are always fed and conveyed with an interval between them, so there is no problem of sheet feeding errors caused by the leading edge of the next sheet catching up with the trailing edge of the preceding sheet. ■Sequential consumption of the stacked paper P on the second side of the table 5, when the sequential intermittent upper A of the table 5 progresses and the top surface position of the table 5 itself exceeds the lower limit PL of the paper J second side position level, at that point the table 5 side protrusion 5C
When the eyes are in contact with the table (d sensor S3, this sensor is turned on and the signal is input to the control circuit. After that, the feeding of the remaining sheets on the plate 5 progresses and the last sheet is Stand 5] -
When the lever 23 is sent out from the
The optical path of the sensor S1 is opened, and the signal thereof is input to the control circuit. Then, the last sheet sent out waits in the special equipment section 21, and then is introduced into the main machine B side, thereby being transferred to the first sensor S5 or the first and second sensors S5 and S5.
111 with all 6 off? Lamp without paper at the point 9
0 is lit, and the display lamp LED-D is turned on and off. When the paperless lamp 90 lights up, the light receiving element Cd on the B side of the machine
When light enters S, the out-of-paper display/warning circuit on the B side of the machine is activated, and the paper feeder A side is displayed/warned that there is no paper left. Generally, in this machine B, the mechanism operation is automatically stopped when the display/warning circuit is activated. m, when the door 85 of the paper feeder is opened to replenish paper, the table 5 automatically descends and stops at the lower limit level ', I as described above, so that a large number of sheets are loaded onto the table 5'-. Stores M sheets of paper. Then, by closing the door 85, the sequence of sections C to J1 is executed again, making it possible to tie a large number of sheets in succession. (7) Intermittent sequence of table 5 due to sequential consumption of stacked paper P at different times Table 1 above
During the movement, even after the top surface position level of the paper reaches the permissible upper limit PH due to the upward movement of the table 5, the upward movement of the table 5 continues due to a paper jam or some other abnormality, causing the top surface of the paper to rise. When the angle is too high, the third upward protrusion 23c comes into contact with the sensor S2 due to excessive rotation of the lever 23, and it is detected that the upper surface of the paper is too thick. Based on the detection signal, the rick motor 8 is reversed and the platform 5 is moved downward. Along with this descent, the stacked paper ``two-sided position falls, and that position is the paper'' - surface position level range! - When the sensor SL detects that the door limiter PL is closed, or when the sensor S3 detects that the top surface of the platform 5 has fallen below the detection level of the sensor S3, the signal is Based on this, the lifter morph 8 is turned into normal rotation, and the platform 5 is raised again for a certain period of time. The cause of the abnormality naturally disappears due to the lowering and re-lifting of the table 5, and the action of the renohe 23 and sensor S1 causes the stacked sheets to be placed at the surface position 1. When the vertical movement of the platform 5 stops in a state within the normal limit range PH-PL, the control circuit determines that the abnormality has disappeared. If the cause of the abnormality does not disappear naturally with one automatic lowering and re-raising of the platform 5 and the sensor S2 is activated after the top surface of the paper is 1 ni, the above-mentioned lowering and re-raising of the platform 5 is repeated several times. If the process is executed and 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, stops the operation of paper feeder A, and activates a warning buzzer built into the device. The system is designed to notify the operator of abnormalities. In other words, paper backlash (paper due to +j) - malfunction of the over-surface sensor S2, a cause that can be naturally removed by lowering and re-raising the Sendai 5 once or several times within a certain range. If there is an abnormality in which the top surface of the sheet is too low, the abnormality will be removed by the above-mentioned automatic lowering and re-rising operation sequence control of the table 5 by the control circuit, and the normal paper feeding operation will automatically continue without activating the warning buzzer. Regarding the R lowering of the table 5, even after a certain timer period preset in the control circuit has elapsed since the start of the J-'=7 movement or the downward movement of the table 5, the paper top surface level sensor Sl or the table top JA is not activated.
, , , When the lz limit 1/bell sensor S3 or the platform lower limit level sensor S4 does not operate, the control circuit is determined to be abnormal in the control circuit motor abnormality check subroutine, and in this case as well, the operation of the paper feeder A is stopped. As it is done,
Warning buzzer operates. (8) Friction clutch mechanism (Fig. f37/17) 2nd II
Feed roller 67 and timing pulley 68 that drives it
The above-mentioned friction launch a mechanism 69a to 6 interposed between
9d is an intervention to remove the following)-ruble. In other words, the paper feed roller 103 on the B side of the machine is jammed.
In the event of an occurrence or due to an erroneous operation, the second conveying roller 68a may come into direct contact with no paper in between and stop rotating. In this case, the second conveyance roller 68a is brought into contact with the paper feed roller 103, causing the second conveyance roller 68a to
It was pushed further downward against the spring plate 67b than when it was in contact with the freely rotating roller 103a of 03, and the reaction force of the spring plate 67b caused it to come into contact with the lower surface of the paper feed roller 103 with a considerably stronger pressing force. in a state. If the second conveyance roller 68a is forcibly rotated against the strong pressing force against the paper feed roller 103 in such a state, the rubber peripheral surface of the paper feed roller 103 will be scraped off. In this example device, the second conveyance roller shaft 67 is rotationally driven via the friction clutch mechanisms 69a to 69d as described above.
Under the above circumstances, the pulley 68 slips and rotates due to the large rotational load on the M2m feed roller 68a, 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 set by selecting or adjusting the tension force of the spring 69d. (8) Load mechanism (Figures 7-18 and 19) The i! ]X
The mechanisms 78a to 78k for applying a rotational load to or releasing a rotational load on the moved 111rl feed roller 56 will be described in detail. Regarding the paper transport load in the paper transport process due to the rotational drive of the first and second paper transport rollers 57 and 68a, there is a The load condition is different in the case of conveyance (feed)). That is, the paper feed roller 40 is connected to the shaft 39 by a one-way clutch 41.
, and after the rotation of the paper feed roller is stopped, the first and second portions of the paper that have not yet come out from under the roller are attached.
Although the paper transport resistance is made as small as possible by idling the support 39L as the paper is moved by the transport 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 from that point on, the paper is conveyed by the paper feed roller 40. Conveyance continues for a while without the above-mentioned conveyance load, and then the driving of f5l and 211rI feed roller 57 68a stops when the clutch 50 is turned off as the encoder 31φ31a counts up a predetermined number of pulses. As the temperature increases, the conveyance will stop. However, in the case of transporting a large size paper, the trailing edge is not pulled 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 general feeding stops. In other words, in the case of small 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 pulse count number set in the circuits of the encoders 31 and 31a should be based on, for example, 1 m feed of small size paper! If we set the number so that the leading edge of the paper stops when it coincides with the base line O-0, then when large-sized paper is transported, the leading edge of the paper will stop due to the heavy transport load described in 2. Edge is base line O-
This results in the paper stopping before reaching zero. On the other hand, if we set the settings based on the transport of large-sized paper, when we advance a small-sized paper by one step, the transport load when the transport stops is light, so the leading edge of the paper will move slightly beyond the ζ line 0-0. An overrun state occurs and the paper is stopped. Then, the paper stops before the leading edge reaches the base line 0-0, and when the paper is fed into the book viB by the paper feed roller 103 on the machine B side, the image forming process of tree 4'l B starts. There will be some paper feeding delay with respect to the progress of the process. Conversely, if the leading edge overruns the base line O-0 and the paper is stopped, an excessive paper loop may occur before the timing roller on the RB side when the paper is introduced into the machine B. This can cause jam problems. The load mechanism eliminates this inconvenience. In FIG. 7-18-19, 78a is a cam fixed to the shaft 75a of the paper size indication dial 75, and 78b is a cam disposed 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 78b is constantly urged to move forward by the tension spring 78e, and its tip end surface always presses into contact with the surface of the cam 78a. As the dial 75 is rotated, the large diameter portion of the cam 78a corresponds to the tip end surface of the retractable rod 78b, and the retractable rod 78b moves backward against the spring 78e. When the small diameter part responds, it moves forward. In this example, when the 84 scale scale (large size paper) of the dial 75 is aligned with the index 77 (Fig. 16), the advance/retreat lever 78
b is kept in the forward position, A4 size or 85 H1j scale (
When the sheets (small size paper) are aligned, the advance/retreat lever 78b is kept in the retracted position. 78f is a coil spring winding (= J-shaped body) fixed to the first conveying roller shaft 56 and has a seat 78g on the left end side; The coil spring winding with 78i is the body, and 78j is ``2-2''.
The two springs on the right side are coil springs that are applied with force to properly tighten both bodies 78f and 78h, and the spring on the right side of 78 is a locking pawl formed on the outer surface of the seat 78i of the body 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. The left and right coil springs shown above are barrels 78f and 78h.
, the entire coil spring 78j is in a state of rotation 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. (spring winding) The rotation of the hook 7811 is prevented by engagement between the rear end of the advancing/retracting rod 78b and the locking pawl 78, so that the shaft 56 has no friction slip between its body 78h and the coil spring 78j. It rotates while producing. That is, the frictional slip force acts on the shaft 56 as a rotational load. Now, set the predetermined pulse count number set in the encoder 31/31a circuit to 1 ([i] based on the transport of large size paper), and set it to the number that causes the leading edge of the paper to match the base line 0-0 and stop. Dial 75
When adjusted to 84th edition, which is a large size paper, the advance/retreat lever is 78.
The rear end of b is away from the spring winding on the right side (= J-shaped cylinder 78h), so the above-mentioned rotational load is not applied to the first conveying roller shaft 56. Therefore, the leading edge of the paper is aligned with the base line 0-0. It matches and stops. On the other hand, use the dialer 5 as a large size paper, A4 or 35
When aligned with the plate, the barrel 78h is hooked to the right spring right at the rear end of the advancing/retracting rod 78b, so the rotational load is applied to the shaft 56. As a result, the rotational load acts as a transport load when transport is stopped for small-sized paper, similar to the transport load that acts on the paper feed roller 40 when transport is stopped for large-sized paper, and suppresses overrunning of small-sized paper. The leading edge of the small size paper is also the base! It almost coincides with M O-0 and stops. As explained above, a load is applied to the first conveyance roller shaft 56 when the paper is of a small size, and the load is not applied when the paper is a large size (77), so that the paper stops regardless of the size. The position O-0 can be made almost the same. The load can be set arbitrarily by appropriately adjusting the tightening force of the coil spring. As an electrical means, the pulse count number can be set in the encoder circuit (large size paper full). 2 for shipping and small size conveyance
1 set, and the force 1 associated with the size instruction operation of the dial 75
．． The set pulse count number may be changed by rotating switch 78a to turn switch k (FIG. 20) on and off. (10) In addition, in the elevating paper storage mechanism described in item (2) above, the sprocket 17 (Fig. 4φγ) is attached to the shaft 12 via the one-way clutch 16, so that the paper feeding device can be used by a service person or the like. When inspecting or repairing A, joint switch S7
When the platform 5 is lowered due to the door switch S8 being turned off by artificially turning on the door 85, or by opening the door 85, it is possible to inadvertently put a hand or other object between the lowering platform 5 and the chassis bottom plate 3a. Even if the table 5 is forcibly stopped due to an object being held, the sprocket 17 will idle on the shaft 12 due to the reverse driving force of the motor 16 due to the presence of the one-way clutch 16, and the table 5 will not be forced to lower. This protects the motor 16 from overloading the motor 16. Conveyance EiB protruding forward from large capacity paper storage section l
2, when the paper feeding device A is not in use, it can be rotated sharply around the shaft 57 in a substantially hanging state and folded into the front panel of the storage section, making the whole paper compact and easy to store. It becomes convenient. (11) Summary of the present invention In short, the present invention provides a large-capacity paper storage section capable of storing a large number of sheets of paper, and a large-capacity paper storage section that is connected to the storage section and installed in a paper cassette insertion slot of an image forming apparatus. A paper transport unit to be inserted, a paper feed mechanism that feeds the sheets of paper from the large-capacity paper storage unit to the paper transport unit one by one, and a paper feed mechanism that transports the fed sheets to a predetermined position in the paper transport unit and temporarily stops and waits. a friction clutch mechanism interposed between the rotating shaft of a conveying roller on the paper conveying mechanism side that presses into contact with the paper feeding means on the image forming apparatus side via the paper, and the rotating shaft driving means; , and when there is no paper in the paper transport section,
Alternatively, when the waiting paper is fed by the operation of the paper feeding means on the image forming apparatus side, one sheet of paper on the large capacity paper storage section side is automatically fed out and conveyed, and the sheet is placed on standby in the paper conveying section. The gist of the present invention is a paper feeding device characterized in that a paper feeding mechanism and a paper transport mechanism are operated in conjunction with each other. That is, the paper feeding device 6 of the present invention is a paper feeding device that is connected to a cassette loading device 1 on the side of the printer for various general paper cassette insertion type image forming apparatuses that do not have a built-in multi-sheet deck mechanism. By inserting a cassette into the paper transport section on the side and using the combination in the same way, there is a large capacity paper storage section on the paper feeder side, so for example 1000 sheets - 20 sheets can be stored on the machine side.
(The 11-copy function allows continuous copying of multiple sheets, such as 10 sheets, without interruption. When the paper waiting for the destination is fed by the paper feeding means on the machine side, the next sheet of paper from the large capacity paper storage section is automatically fed out and conveyed, and the paper conveyance section is immediately replenished. Since the machine is on standby, there is no need for a signal line to exchange paper feed timing, etc. between this machine and the paper feeder η.In other words, the connection of the paper feeder to this machine is to connect the paper feeder to one cassette slot of the machine. It is only necessary to physically fit the paper conveyance section on the paper device side into the same way as when inserting a cassette. Therefore, it can be widely used in combination with the various paper cassette insertion type image forming apparatuses currently on hand. , since the conveyance roller on the paper conveyance mechanism side for the paper feed means on the image forming apparatus side is rotationally driven via a friction clutch mechanism, the paper feed means on the side of the image forming apparatus is rotated via a friction clutch mechanism. Even if the paper means is stopped in direct pressing contact with the conveyance roller without the intervention of paper, and a rotational driving force is applied to the conveyance roller, the conveyance roller is not forcibly rotated due to the presence of the friction clutch mechanism. This has the effect of eliminating the problem of scraping of the paper feeding means on the machine side, and is a highly reliable general-purpose unit that enables continuous copying of many sheets!:9 without interruption. Capacity automatic paper feeder tσ
as valid and appropriate.

[Brief explanation of drawings]

The drawings show one embodiment of the paper feeding device of the present invention, and FIG. 1 is a partially cutaway side view of the image type T & device connected to this machine, FIG. 2 is an exploded perspective view of the pedestal, and FIG. Figure 3 is a cross-sectional view of the rail with the rollers inserted, Figure 4 is a right side view with the right side paddy board removed, Figure 5 is a left side view with the left decorative board removed, and Figure i6 is a longitudinal section. 7 is a right side view, FIG. 7 is a cross-sectional plan view, FIG. 8 is a vertical sectional front view along line 7 (8)-(8), and 9
The figures are the same as above when staying at ljl (13)-(9), the enlarged plan view of the t510 beam lid motor part, Fig. 11 is an enlarged plan view of a part of the paper detection swing lever, Fig. 12 is the same side view,
Figure 13 is an enlarged side view of the gear train of the paper feed/conveyance mechanism section, Figure 14 is a plan view of the paper conveyance/special unit, and Figure 15 is a diagram of the state of the paper conveyance/special unit before connection. Side view showing 1st
Figure 6 is an enlarged side view of the paper size designation dial, No. 1.
7 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, and FIG. 20 is a block diagram of the main control circuit. Fig. 21 is a control circuit for the beam lid motor, Fig. 22 is an overall flowchart of the operation of the device, Fig. 23 is an operation flowchart of the elevating paper storage platform mechanism 1, Fig. 24 is a paper feed/ffrt feed/ Standby mechanism operation flowchart I.
, FIG. 25 is a drive timing chart of the beam lid motor. A is the paper feeder, ■ is the large capacity paper storage section, 2 is the transport section, B
1 is the image forming bag Fq of this machine, C is the pedicle of this machine, and D is the pedestal of this interleaving paper device. Figure 246 Figure 25 Procedure P+li Seijutsu (Method) J, Incident display +1r (, I'1157/4E 'lr l'f'l'
MA No. 185966 c, 6 2, ut; , (11,11,1)Gee V/N system p company 4
Substitute P11 person 7, 11 amendments (]) Amend the description as follows. Page line Wrong Correct 1
2 6 (Figures 7 and 9) (Figures 7 and 9 Fist 11) //1
1 Colo 7 Tei 7, Colo 7 Kushi 714 7 Forward rotation drive a Forward rotation drive b/l 14 Reverse rotation drive b Reverse rotation drive a15 3 (10th flash) (Figures 9 and 10) /
/17 Idle rotation Rotation 1719 Forward rotation a Forward rotation b 22 12 (Fig. 7) (Fig. 6, 7, 9) 2
4 11 52a 52 /l 12 Claw arm Claw arm 52a29
End 67 67 (Figure 607) 30 12
-13 68C68C (Fig. 6) 3115 Length 1 method Thickness dimension 32 5 70 70 (Fig. 7)/l 10
Pulley 68 Pulley 691119 Pulley 68
Pulley 69 35 8 79a conflict 79b 78・7937
15 90 90 (Fig. 6φγ) // 1
8 dS ds (Figures 1 and 15) //
End Plate 65e Plate 39 4 Above Above (1) 41 1O Lower Limit Upper Limit/I'19 36 34 4513 Sensor Sensor 55-3646
1 7 φ云 )h period
65C of Deuteronomy 1Mu 48 2 65C
and 50 8 always till // 15 104 103 54 end 68 6956
8 Interlocked Interlocked 5914 Large size Large size 61 13 Large size Small size 63 8 Motor 16 Motor 8 //10 Motor 16 Motor 8 //13 Axis 57 56 (2) Drawings, plans (Figures 1 to 25) Correct as shown in the attached sheet.

Claims (1)

[Claims] (1) A large-capacity paper storage section that can store a large number of cut sheet papers, a paper transport section that is connected to the storage section and fits into one paper cassette insertion part of the image forming apparatus, and a large paper M: A paper feeding mechanism that feeds the sheets of paper from the paper storage section to the paper transport section one by one, a paper transport R mechanism that transports the fed sheets to a predetermined position in the paper transport section and then stops and waits, and an image forming apparatus side. A rotating shaft of a conveying roller on a paper conveying mechanism side that presses into contact with the paper feeding means of the paper conveying mechanism via the paper, and a friction clutch mechanism interposed between the rotating shaft driving means. When there is no paper in
Alternatively, when the waiting paper is fed by the operation of the paper feeding means on the image forming apparatus side, one sheet of paper on the large capacity paper storage section side is automatically fed out and conveyed, and the sheet is placed on standby in the paper conveying section. A paper feeding device characterized in that a paper feeding mechanism and a paper transport mechanism are operated in conjunction with each other.