JPS5978030A - Paper feed device - Google Patents

Abstract

PURPOSE:To make it possible to continuously copy, by feeding papers one by one in cooperation between a paper feed mechanism and a paper transfer mechanism, and by energizing a no-paper indication and alarm circuit on the side of an imaging device in accordance with a signal from a photo element, which is issued when the final paper is fed. CONSTITUTION:When papers P stacked on a bed 5 are fed out one by one by paper feed rollers 40 and therefore the level of the upper surface of the stacked papers P is lowered to a lower allowable limit PL, this condition is detected by a level sensor S1, and therefore, the bed 5 is raised for a predetermined time by means of a lifter motor 8. Then, when the final one of the papers P is fed out from the bed 5, the plunger 23a of a paper detecting swingable lever 23 is largely tilted by being dropped in an aperture 5b in the bed 5, so that a light path for the sensor S1 is opened, resulting in that the signal of the sensor is delivered to a control circuit. Thus, when the final paper is fed out and a paper standing by is fed to the main machine side so that the condition of no paper on the transfer path is detected, a lamp is illuminated and as well an alarm is issued, and the machine is automatically stopped.

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 a simple printing machine for electronic or electrostatic photocopying machines generally uses a paper cassette insertion method for feeding paper. This is a method in which a cant sheet is inserted into the cassette insertion slot in advance, and the paper in the cassette is drawn into the machine one by one by the action of the machine's paper feeding means and fed to the image forming section. -By preparing several paper cassettes each containing paper of different paper quality, paper can be easily replaced with this machine by inserting and removing the paper. Alternatively, by providing a plurality of cassette slots on the machine side and inserting cassettes into them, it is convenient because it allows the paper to be changed for the machine with a single operation of a selection button. However, the maximum paper storage capacity of the paper cassette is 250 or 500 sheets, so when copying a large number of sheets, such as 1000 or 2000 sheets, in succession, the number of times in the process Tp is 0. It is troublesome to have to replenish the paper in the cassette, and copying is interrupted each time, making it impossible to take full advantage of the machine's high speed. Therefore, for example, 200
Some machines are equipped with a multi-sheet deck (or I-ray) mechanism that can store and feed a large amount of paper, such as 0 sheets, at once.
The digital mechanism is a built-in device built into the model, and is a ¥11 mechanism of the image forming apparatus. With regard to general paper-loading type image forming apparatuses, it is possible to insert objects into the cassette/insertion slot in the same way as a cassette without connecting a cable (signal line) between the image forming apparatus and the image forming apparatus. I! By fitting and connecting to n9 and matching M1, it is possible to perform continuous copying of multiple sheets of 1000 sheets, 2000 sheets, etc. without interruption until the end, and can be widely combined with various paper cassette insertion type image forming devices lv. The purpose of the present invention is to provide a highly reliable large-capacity automatic paper feeder of a general-purpose unit type that can be used. A detailed explanation will be given below based on an example device shown in the drawings. (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 feeder A on the water side can be roughly divided into two types: ■ For example, J
A descending type paper storage table mechanism that can accommodate .ET, a paper feed mechanism that feeds the stacked papers one by one from above, a large capacity paper storage section 1, and ■ From the upper front of the storage first 1 to the front. Insert the protruding paper cassette 1 on the B side of the machine.
It consists of a conveyor section 2 for transporting one sheet of paper that is inserted into the holder 101, 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 made up of left and right vertical frame sides 110, which are joined together by welding, screws 1, etc., and lower horizontal frame sides 111, 111. A pair of left and right horizontal rails 113, 113 connected to the back frame and rearward protruding horizontal lugs 112, 112 formed on the left and right sides of the side horizontal frame by screws 1 at their tips, respectively, and both rails. A common pedestal 114 for both rails fixed to the lower surface of the rear end by welding, screwing, etc.
, the horizontal adjuster type floor contact seats 115, 115 provided on the left and right sides of the lower surface of the base legs, and the left and right vertical frame sides 110, 1 of the back frame.
10, the paper feed device was installed at approximately the center fjp, respectively. It consists of rear protruding pins 116-116 for left and right positioning. Each of the pair of left and right horizontal rails 113 is an upward channel rail with a substantially U-shaped cross section, and the length is L% longer than the front-rear direction of the bottom plate of the large-capacity paper storage section 1 of the paper feeder A = J method. 11
7-117 is a rail groove young plate formed by bending approximately the front half of one of the left and right diagonal sides of the two-way channel rail at a right angle toward the other side, 118 - 118 is a protrusion formed approximately at the center 7 to 3 of the bottom plate surface of each rail, and 119 and 119 are bending stopper pieces at the rear end of the rail. The pedestal shown facing the figure has four outward facing lugs 12 formed at the top and bottom ends of the left and right vertical frame sides 110 of the vertical back frame, respectively.
0 to each outer plate using the outer plate fixing screws 121 and 121 on the case yl/insertion 11 side of this viB, and the base plate outer plate fixing screws 122-122 on that side. It is firmly positioned and fixed to B and pedicle C. The floor contact seat 115 of the pedestal leg 114 is -
The position of the machine B and pedicle C when seated is adjusted by twisting them forward or backward to bring them into contact with the floor. Four rotating rollers 123 that fit into the grooves of the left and right channel rails 113 are arranged near the four corners 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 that fits into the upward side of the right channel rail 113 on the side where the rail groove cover plate 117 is not formed as shown in the third figure.
A mold positioning flff and materials 124 (made of synthetic resin, for example) are provided. To attach paper feeder A to machine B, install paper feeder A into the grooves of the pair of left and right horizontal channel rails 113 on the pedestal that is firmly attached to the main machine and pedicle C.
Of the four rollers 123 on the lower surface of the bottom plate, first insert the front left and right rollers into the cylinder, and also insert the downward U-shaped member 124 near the right roller.
to the side facing rail-L on that side and tie the paper tying device A.
Push the whole thing forward, make the front left and right rollers ride over the protrusion 118 of the rail plate, and then push it further forward without moving. Next, fit the rear left and right rollers into the left and right rail grooves, respectively, and insert the downward U-shaped portions J and l-124 near the right roller.
to the upward side of the rail on that side and push the device A further forward, and the rollers on the rear left and right also fit into the protrusions 11 of the rail.
Ride 8 and let him fight 2 times. As paper feeder A is pushed in the 10 direction, paper feeder A
Conveyance for one sheet of paper protruding forward from the machine B] - Insert II t o into the cassette of the machine B through the upper horizontal frame side 111 of the vertical spine frame of the pedestal. When the rear left and right rollers 123 climb 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. Further forward movement of device A is prevented. At this point, the rear protruding pin tte for adjusting the left and right position of the paper feeder on the pedestal side is fixed to the paper feeder A.
The pin has entered the corresponding pin entry hole 116'a on the side for 1 minute, and the paper feeder A's single sheet transport/special unit 2
The cassette inserter 8B fully enters the cassette inserter 101 to the proper position and becomes fitted into the cassette inserter 101. In addition, in device A, the rear left and right rollers 123 are connected to the protrusion 1 of the rail.
18, it is stopped by the protrusion and stably held at the final forward position. By mounting the sheet feeding device A on the base rail 113 and sliding it forward, the connection of the device A to the machine B is completed. To position the paper feeder for this machine B, first, position the pedestal against this machine B (=J injury). The position is determined by the contact of the device A against the h of the pedestal (the upper horizontal frame side 111 of the back frame), and the positioning of the left and right force direction (direction perpendicular to the rail) of the device A is determined 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 part old 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. The height direction is
The advantages of screws 121 and 121 for this machine B, which has a two-way seat, are made for positioning and rail surface. In this way, the paper feeding device A is mounted on the pedestal rail 113, the slide I is moved forward sufficiently, and the machine cassette 71 and the insertion I of the device A are moved forward.
The push-in connection to ll l 01 is made with precision and without any problems. Also, after connecting paper feeder A to the above machine, four rollers 1
23 are both located at the part of the rail 113 where the GT plate 117 exists, and the floating movement of the -C device A from the rail is prevented. When clearing a jam in the cassette insert IJ I O1 of this machine B, move the paper feeder A connected to the tree 4m B by letting the rear left and right rollers 123 go over the rail protrusion 118. After sliding it on the rail 90 until it abuts against the stopper piece 119 at the rear end of the rail, rotate it. Then, the single-sheet conveyance/special unit 2 of the apparatus A becomes as if it were pulled out of the cassette insert/unloader 11101 of the machine B, and the jam can be easily cleared. Equipment A after Jato treatment
If you put it on the rail and push it to the front J, device A will be connected to machine B again. In addition, this machine B in the illustrated example has paper cassettes 1 and 2 on the bottom.
02/101 (This is an Iffi type, in this example, the lower cassette insertion) 101 is designed to fit and connect the special unit 2 for transporting one sheet of paper to the paper feeder. Leave the cassette (on the lower side) inserted in the cassette (E), and if necessary, operate the paper selection button on the B side of the machine to switch the paper feed to the 1st cassette side. It can be used by extending it inside. Instead of hooking the lower end of the pedestal vertical frame to the pedisc C with the screws 122, it may be formed into a hook, and the pedestal may be hooked by hooking the hook onto a cross beam on the back side of the pedicle bottom plate. (2) The R lowering type paper storage mechanism 3a*3be3co3d (Figures 4 to 6) has a bottom plate and
A horizontally long and vertically long chassis 14, which consists of a combination of four panels: a front panel, a right panel, and a left panel, with the rear and "-" sides open.
4 (Figures 7 and 9) is the chassis - right side plate 3C and the same left side plate 4 &
3. Each of the 3 d's ``1'' has a transversal U-shaped channel rail arranged vertically facing each other near the 0 side. Board 6
-1-Tm pairs of rollers 7 are pivoted on the outside of each plate 6. And their left and right names...
Place each pair of rollers on the left and right vertical channel rails 4 and
It is inserted into the groove of No. 4 and engaged. Therefore, the paper storage table 5 is mounted on the rails 4, 4, and is a top movable structure. Reference numeral 8 denotes a drive motor for driving paper storage stand A (hereinafter abbreviated as lifter motor) which is held on the inside F part of the chassis right side plate 3c, and the rotation of the motor shaft is controlled by a reduction gear box 9 (10th 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 SBRONket 1 is fixed to the projecting end. 12 and 13 (Figures 6 and 8) are the left and right chassis side plates 3d.
Two parallel wooden rotating shafts are arranged with bearings between the lower corners on the front side of φ3C and between the same 1-corner 98, respectively, and the two rotating shafts 12φ13 have sprockets 14 on both ends thereof, respectively.
-14.15-15 is fixedly arranged. The blocks 15 and 15 may be free to rotate relative to i1'+I+13. The right end of the rotary shaft 12 on the left side 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 10 and the sprocket 17 at the outwardly projecting end of the drive shaft 10, and 19'-19 is the parallel rotation shaft 13 of the two lower trees.
- A pair of left and right vertical wheels suspended between 12 left sprockets 15-14 and between 12 right sprockets 15-14, respectively. - This left and right pair of longitudinal chains 19.1
9 (Figs. 6 and 8) from the left and right longitudinal slots 1 and 3e formed in the chassis front plate 3b by extending the tips of the left and right side plates of the paper storage table 5. Chassis
It is firmly connected to the arm plate 5a extending outward from the front plate 3b. When the lifter motor 8 is rotated a (FIG. 4), the rotational force is transmitted to the lower rotation l!t+ 12 via the sprocket 1/11 → churn 18 → sprocket 17 → one-way clutch 16, This causes the left and right vertical chains 19, 19 to rotate in the direction of the platform 5, causing the platform 5 to move on the rails 4, 4. Conversely, when reversely driven, the sprockets +17 The direction of rotation is the one-way crank 16 or the direction of the idling shaft 12.
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・]5Φ14.15φ14, -1-
The rotating shaft 13Φl2 of F rotates in the opposite direction, and the table 5 moves to the rails 4 and 4.
It moves downward along. 20 (Fig. 10) A gear disc for the motor brake fixed to the rear end of the rotating shaft of the beam lid motor, 2■ is a spring in the direction of engagement with the gear disc at all times, and an electromagnetic suction device 22 This is a pawl plate that moves away from the gear cutting disk 20 when energized. Therefore, the electromagnetic suction device 22 is not energized from a moment before the start of energization to the lifter motor 8 to drive the motor in forward or reverse rotation until a moment after the energization is cut off. During this period, the pawl plate 21 is held in the retracted position, allowing the motor 8 to rotate forward and reverse three times. - Outside the period shown in the figure, idle rolling of the motor shaft is prevented by the engagement of the pawl plate 21 with the gear cutting disc 20. As a result, the table 5 located at the lifting position jrq in the middle of the vertical rails 4, 4 is driven by the motor 8 due to the self-gravity of the table and the paper P loaded thereon.
The table 5 is prevented from sliding down by itself while rotating 611 idly, and the table 5 is stably held at the lifting position. 23 (Figs. 7, 11, and 12) is a rocking lever for paper detection in the shape of a plane, which is rotatably held on a bearing inside the corner of the front side of the right side plate 3C of the chassis. A first protrusion 23a provided at the tip of the F-oriented protrusion 23a, and a second protrusion 23 that also points downward but has a shorter protrusion length than the first protrusion 23a.
b and the third protrusion 2 in the direction of ``-'' installed in the middle of Shihachi-23.
3c, and a "-oriented protrusion 23d provided at the base of the lever. The first downward protrusion 23a comes into contact with the seventh most paper surface of the stacked sheets P on the table 5-12. The protrusion 23b of ff52 is 5! on the stand 5! When the next sheet of paper is fed and the first protrusion 23a is inserted into the through hole 5b on the table 5 side, it hits the surface of the protrusion 5- on the way and the lever 23 is rotated in the -1- direction. acts to prevent J two-faced protrusion 23C of t53 is chassis
It faces a sensor S2 for detecting too much paper upper surface, which is disposed on the inner surface of the L side of the front surface 3b. The fourth -1-direction protrusion 23d is a photoelectric paper-L-facing light path section of the bell sensor SL, which is a photoelectric paper consisting of a light source and a light-receiving element arranged above the base of the lever 23 inside the chassis-right side plate 3C. positioned. The upper part of the storage paper P loaded on the stand 5 facing the specified 11
When the surface 1/bell range P ) i −PL is within L (FIG. 121), the lever 23 is in a certain tilt angle range α close to horizontal due to the contact of the first downward protrusion 73a with the sheet 11 surface.
The fourth negative protrusion 23d blocks the optical path of the photoelectric sensor 51. As a result, the first side of the stacked paper P is at a predetermined level V (level range P H-P L
It is detected that it is inside. When the stacked sheets P on the table 5-l2 are sequentially fed out one by one from the sheet binding mechanism which will be described later, the upper surface position of the loaded sheets gradually shifts. Following this, the lever 23 sequentially tilts and rotates. Then, when the upper part 1i of the paper reaches the limit level PI, the optical path of the sensor S1, which had been blocked by the fourth protrusion 23d of the lever 23, is completely opened, and the upper surface position of the stacked paper reaches the allowable lower limit level. The drop to PL is detected. Based on this signal, the electromagnetic suction device 22Δ of the lift motor 8 is energized via the control circuit, and the claw plate 21 escapes from the gear disc 20 of the lift motor 8. Next, the lifter motor 8 is rotated in the normal direction and energized in the a direction, so that the platform 5 moves upward and the entire stack of sheets P is lifted. Due to this lifting movement, the first side of the stacked paper P is moved 1-A. Accompanying this, the lever 23 in the inclined position rotates back and the optical path of the sensor S1 is interrupted. After a predetermined period of time has elapsed since this optical path interruption signal, the lifter motor 8 is
) is cut off, and then the power to the 'R magnetic attraction device 20 is cut off. In this way, when the stacked sheets P on the table 5 are consumed, for example, about 20 to 30 sheets, the long movement of the table 5 as described in 1-4 is automatically executed intermittently and the top surface of the stacked sheets P is The position level is always maintained at a predetermined tolerance level PF■-PL. As the stacked paper P continues to be consumed, the table 5 is also intermittently used.
Go into the level range P H-P L of the top surface of the K river paper, and move to platform 51.
- When the last sheet of paper is fed, the first downward protrusion 23a of the lever 23 falls into the through hole 5b formed in the table 5, and the second downward protrusion 23b falls into the upper surface of the table 5. The lever 23 tilts and rotates αL L until it hits and is received.
The fourth downward protrusion 23d of the lever is completely removed from the optical path of the sensor Sl. It is detected that there is no paper on the table 5 based on the signal from the sensor S1 at this time and the signal from the table 5's upper eye position 1 sensor S3 which will be described later. . S3 and S4 (Fig. 8) are the right slit holes 3 of the longitudinal slit holes 3e*3e on the outer surface side of the chassis front plate 3b.
e are upper A-cut upper limit position sensors (for example, Micro Nutsch) and downward movement lower limit position sensors (the same) of the table 5, which are disposed at the upper and lower end positions of the table 5. The table 5 is moved intermittently by -1-+1 in sequence as described above, and when the two sides of the table 5 itself reach the lower limit level PL of the paper upper surface level range, the chain for lifting and lowering the table 5 is engaged. The protrusion 5C formed on the locking connecting arm 5a acts on the upper limit position S3, and reaching the second limit position of the table 5 is detected, and the signal is input to the control circuit. At this point, there is still some paper P left on table +5, and when all the remaining paper has been fed, a paper out signal from sensor S1 based on the large inclination αLL of lever 23 described above is sent. Input to 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 sensor S2 for detecting that the top surface of the paper is too thin will be described later. (3) The paper feeding mechanism 24 for one sheet of paper (Figs. 5 and 6) is located at the bottom of the inside of the chassis left side plate 3d.
The land interest was maintained in 3.149. The rotation of the morph shaft of the paper feeding mork (hereinafter abbreviated as paper feeding motor) 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 if timing pulley 27 is fixed to the protruding end thereof. 28 (Fig. 5113) is a pin shaft installed on the outer surface of the left side plate 3d of the chassis, and the fJS2 quimming pulley 29, the first gear 30, and the south cut disc 31 for the encoder are concentrically attached to this pin shaft. This combined body is rotatably supported, and the first timing pulley 27 and the second timing pulley 27 are connected to each other.
A timing belt 32 is suspended between timing pulleys 29. Therefore, when the paper feed motor 24 is rotationally driven, the three components: the pulley 29, the It gear 30, and the gear cutting disk 31 are rotationally driven. 33 (Fig. 6Φ7ψ11-13) is a paper feeding support shaft which is disposed on the two parts of the left and right chassis side plates 3dΦ30 so as to freely rotate between 3d and 30. The left end of the support shaft is extended. It is made to protrude to the outside of the chassis left side plate 3d, and a one-turn flanch (spring clutch) 34 and a second gear 35 are attached to this protruding shaft portion. 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 351 The shaft 33 is not rotated by simply rotating the shaft 33 idly. When the first electromagnetic suction device 36 is momentarily energized and the outer ring is unlatched by the claw arm 37, the clutch is turned on and the second gear 35 and the shaft 33 are coupled to each other.
3 rotational drive is performed. 11+ 33 rotates approximately once and the protrusion 34a of the outer ring
When the gear is hooked to the claw arm 37 again, the clutch is turned off, and the second gear 35 becomes free to rotate on the shaft 33, and the rotation of the shaft 33 is stopped. That is, the paper feed support shaft 33 is intermittently rotated one rotation each time the first electromagnetic device 36 is momentarily energized. 38φ38 (Fig. 7) has a cross section with a substantially downward-pointing mouth shape, 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, and the base supported freely in rotation, with the tip facing forward. A paper feed roller support arm 39 is a paper feed roller shaft rotatably supported by a bearing at the end of the pair of left and right arms, and 40 is a paper feed roller attached to several positions of the shaft via one-way clutches 41, respectively. , 40a is a weight roller fixed to the shaft 39, and 42a is the paper feed roller support arm 3.
Paper feed support shaft 3 in one arm base channel of 8.3B
3, a timing pulley 42b is fixed to the paper feed roller shaft 39 in the channel on the tip side of the arm, and 42c is a timing pulley fixed to both pulleys 42a and 4.
This is the timing belt suspended between 2b. 45-45
These are single-sheet separation claws that contact the right and left corners of the leading edge side of the topmost sheet P of the stacked sheets P lifted and supported by the table 5. The left and right separating claws 45 are formed at the upper corners of the front sides of a fixed reference side plate 88 and a movable side plate 86, respectively, for regulating the sides of stacked sheets, which will be described later. As the paper feed support shaft 33 is driven one rotation, the shaft 33
During one rotation of the pulley 42a → timing belt 42c
→ Pulley 42b + candy paper roller shaft 39 → Paper feed roller 40 is rotationally driven in the paper feeding direction via one-way clutch 41, and a feeding force is applied to the second most paper of the stacked papers P, and only one paper is separated. It is sent forward over the claws 45 and 45. The sheet roller 40a functions to keep the paper feed roller 40 in constant pressure contact with the upper surface of the stacked sheets with an appropriate force. 46 (Figure 5, Figure 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 3o. 47.50
51 is a fourth gear and a clutch (spring clutch) attached to a shaft 49 which is freely rotatably supported by the chassis left side plate 3d and auxiliary side plate 48 (Figs. 7 and 8); It forms a fine southern part on the surface. 4th gear 4
7 is in mesh with the third gear 46. 52a is a second shaft for swinging the claw arm applied to the gear cutting rear outer ring 51;
This is an electromagnetic suction device. When the second electromagnetic suction device 52 is not energized, the pawl arm 52a is held by a spring in a state where it escapes from the gear cutter rear outer ring 51 of the clutch 50, and in this fat state, the clutch 50 is in the on state. The fourth gear 47 is coupled to the shaft 49. Conversely, when electricity is applied, the clutch 50 is held off by the claw arm 52a's gear cutting rear outer ring latching, and the fourth gear 47 is set to 61149.
From evening to evening, it is held in the free rotation state T11. 53 is a fifth gear fixed to the shaft 49, and 54 is the fifth gear.
A sixth gear (idler) 55 meshed with the gear is a conveyance roller shaft gear (seventh gear) meshed with the sixth gear. 56 (Figures 6, 7, and 13) is the first conveying roller shaft, which is a bearing formed by extending and protruding the front side-1 corners of the left and right side plates 3d and 3C of the chassis, respectively. Board 3d・30
A bearing is rotatably held between the shafts 56 and 56, and the conveyance roller shaft gear 55, which is the seventh gear, is fixed to the left end of this shaft 56. 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) is a driven presser roller brought into contact with the upper surface of each conveyance roller 57 with an appropriate pressing force. . The shaft 60 of the driven presser roller is supported between a pair of left and right protrusions 63-63 formed on the upper and lower sides of the upper guide plate 61' of a pair of upper and lower paper guide plates 61Φ62 disposed between the paper feed roller 40 and the transport roller 57. The driven presser roller 59 can freely rotate around this shaft 60. Each driven presser roller 59 is connected to each lower conveying roller 5 from the notch hole formed in the -1- side guide plate 61.
It is constantly in contact with the two sides of No. 7. Therefore, while the paper feed motor 24 is being rotated, the crank 50 is on when the second electromagnetic attraction device 52 is not energized, so the rotation of the first gear 30 is 4T equal to the rotation of the motor 24. 3rd gear 46 → 4th gear 47 → Kura, Chi 50 → 49 →
The signal is transmitted to the first conveyance roller shaft 56 through the path of the fifth gear 53→sixth gear 54→seventh gear 55, and the first conveyance roller 57 is rotationally driven in the paper feeding direction. Further, the driven presser roller 59, which is not affected by the rotation of the roller 57, also rotates. On the other hand, when the second electromagnetic suction device 52 is energized, the clutch 50 is off, so the fourth gear 47 idles around the wheel 49.
is not rotationally driven. That is, the 11th F9 feed roller 57 is not rotated. (4) The paper 1 and special equipment section 2 65 has its base connected to the first conveyance roller shaft 56 and projects forward from the chassis front plate 3b-L section of the large-capacity paper storage section 1. This is a flat box-shaped transport unit base. The "width and thickness" method of this flat box-shaped base almost corresponds to the width and thickness "j" method of a thin paper cassette for storing 250 sheets, and the length "x" method corresponds to the width and thickness of the thin paper cassette for storing 250 sheets. depth of mouth

【'' It is the J method, which is slightly longer than the ° method. Further, the flat box-shaped base body is free to swing around the 11fO feed roller shaft 56 within a range of a position from a substantially horizontal position to a downward position of approximately 100 degrees forward (FIG. 4). Therefore, if the cassette I/insertion slot on the machine B side to which the paper feeder A is connected is a thin paper cassette for accommodating 250 sheets, one sheet of paper mainly composed of the above-mentioned flat box-shaped base 65 can be inserted into the cassette insertion slot. At the same time as the destination conveyance/special equipment section 2 inserts the cassette, the cassettes are fitted together. Furthermore, since the base body 65 has a degree of freedom of swinging around the shaft 56 as described in 1. However, the misalignment will be corrected naturally as it advances, and eventually the single-sheet transport/special unit 2 will smoothly fit into the cassette insertion unit 1 in the correct position and posture. 66/66 (No. Figures 4 and 5) are the tree J that connects the paper feeder BA.
flt B side cassette insertion jiQ T: +101 is 5
When the cassette is for storing 00 sheets of thick paper (this example is in this row), the cassette I. In order to adapt to
These are removable, downward-facing cam-shaped spacer plates that can be conveniently used by screwing them onto the outer surface near the tip. That is, in this case, when the rails 113 and 113 are fixed and pushed forward in order to connect the paper feeder A to the machine B, the left and right shoulder surfaces of the lower edge of the cassette insertion 1:1101. The front slopes 66a, 66a of the cam swivel plate come into contact with each other (FIG. 15). After this contact, if you continue to push the paper feeder A, the 4'1 surface 66aφ66a will be inserted into the cassette i/insertion 1:
+ 101, and an upward rotational force about the shaft 56 acts on the flat box-shaped base 65. As a result, as the paper feeder A is pushed, the inclined cam plate-shaped spacer plate 6
Due to the lifting action of the rows 66, the base body 65 naturally changes its posture approximately in the water direction, and its tip smoothly enters the inside of the cassette insertion opening 101, and then the spacer plates 66 and 6
The lower end of the base body 65 is transferred 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, the cassette insertion I-,,+101 on the B side of this machine is 2.
Whether it is for a V-shaped paper cassette for accommodating 50 sheets or for a thick paper cassette for accommodating 500 sheets, in both cases, the paper feeder A's single sheet conveyance/special unit 2 In one cassette insertion on the B side of this machine, the 1st side of the 21a feed roller 68a (described later) on the base 65 side of the transport/special equipment section 2 is connected to the paper feed roller 103 which is the paper feeding means on the B side of the machine. Free rotation auxiliary roller 10
3a and protrudes forward from the front plate of the base 65; the paper size specifying cam plate selectively contacts the paper size detection switch group 104 on the machine B side. The machine B and paper feeder A are now 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 body 65, and is an axis parallel to the first conveyance roller shaft 56. This shaft 67 has its left and right ends connected to a base 65, respectively.
Longitudinal long holes 65e formed in the left and right side plates 65a and 65b of
(Fig. 16) - The bearings 67a, 67a, which are fitted in the lower slide to freely move, are rotatably supported. The bearing 67aψ67a is inserted into the elongated hole 65e.
It is held up until it is caught on the edge. 68a and 68b (Fig. 7 Φ14) are the 21119th conveyance rollers attached to the conveyance roller shaft 67 of the distribution 2. 68a is attached to the shaft 67 via a one-way clutch 68C, and 68b is attached to the shaft 67 so that it can rotate freely, and has a smaller diameter than the roller 68a. One side of each of the second conveying rollers 68a and 68b 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. Then, paper feeder A is used for this machine B.
When the rollers 68a and 68b are connected, the rollers 68a and 68b are positioned corresponding to the lower surface of each paper feed roller 103 (made of rubber) (for example, a roller made of acetal) on the machine B side (Fig. 1). 11'', the roller 68a comes into contact with the lower surface of the roller 103a, and the 211th! feed roller shaft 67 sinks a little against the lifting spring plate 67b. Since the roller 68'b 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 very small gap therebetween. 69 (Figures 7 and 17) is a timing pulley that is rotatably provided approximately in the middle of the second conveyance roller shaft 67, 69a is the second left thrust IJ of the pulley, 69b is the right thrust I/stop, The distance between the thrust stops 69a and 69b is larger than the length of the pulley 69. 69c is a washer loosely fitted into the holder 67 on the right side of the pulley 69;
69d is attached to the washer 69c and the left thrust 1 69
This is a coil spring compressed between b. Therefore, the pulley 69 is constantly moved in the direction of the left thrust stop 69a via the washer 69C by the force of its coil spring.
A suppressing wedge is formed between the washer 69c and the pulley friction holding-slip mechanism (friction clutch mechanism).
is configured. Reference numeral 70 denotes a timing pulley 71 fixed to a substantially intermediate position of the first conveying roller shaft 56 in correspondence with the above-mentioned pulley 69.
is a timing belt suspended between this pulley 70 and the second conveyance roller 167. When the first conveyance roller 156 is driven to rotate in L2, the pulley 70 → bells 1 and 71 → pulley 68 → pulley friction holding force of the friction clutch mechanism written in - → second conveyance roller shaft 67 → one-way clutch The rotational force is the second in the path 68c.
is transmitted to the Jllit feed roller 68a, and the roller 6
8a is rotationally driven in the paper feeding direction. However, if the rotational load force of the second conveyance roller 68a is greater than a certain set value, the force will be reduced to the first conveyance roller shaft 56.
Even if the pulley 68 on the second conveyance roller shaft 67 side is rotated, the pulley 68 on the left thrust 1 engages the left thrust 1 69b and the washer 69c.
A slip rotation occurs against the frictional force between the second conveyance roller 68a and the second conveyance roller 68a, which idles on the shaft 67 and is not forcibly rotated. The effect will be explained in a separate section. 73 (FIGS. 7 and 14) is a flat box-shaped base 65, on which the bases are supported by bearing pieces 65f-65f formed at the bases of the left and right side plates 65a and 65b by extending the side plates upward. It is a drainboard-shaped paper guide plate that can be freely raised and lowered with respect to the face plate 65c, and is kept tilted at all times. By folding down, the base top plate 6
5c and the kite plate 73, a paper conveyance gap path is formed that reaches the first conveyance roller 57 and the second conveyance rollers 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.
Among the various size scales 76 (fiTJ161N) 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 size dial 75 (FIG. 16) is displayed on the dial surface. When the scale of the paper size stored for one night is aligned with the index 77, the force L1 protrusion of the combination corresponding to that size projects from the through hole formed in the front plate 65d of the base 65 to the front of the front plate 65d. The state will be as follows. Instructing the paper size to be used using this dial operation must be performed or confirmed before connecting the paper feeder A to the machine B. The force 1 plate protrusion that protrudes forward from the base front plate 65d in response to the paper size specified by the dial determines the paper size used on the machine B side when the paper feeder A is connected to the machine B as described above. The switches in the size detection switch array 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 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 and S6 (Fig. 6 and 7) are the first and second conveyor rollers disposed at two positions, one near the 1fll conveyance roller 57 and an approximately intermediate position between the first conveyance roller 57 and the second m, and the conveyance rollers 68a and 68b, respectively. Second paper sensor (e.g. microswitch)
The rollers are supported by a base body 65 via a sliding support member or the like so that the respective rollers can be adjusted and positioned in the direction between the first and second conveying rollers 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 mounted on the outer surfaces of the chassis left and right side plates 3dΦ30 as printed circuit boards 79a and 79b (FIGS. 4 and 5). A transformer and the like are arranged on the chassis bottom plate 3a, but are omitted from the diagram. 80-81 and 82 (Figures 6 and 7) are 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 can be attached and detached with screws or the like. 83 is a lid that closes the top opening of the chassis, and can be opened and closed freely around a pivot 84 (FIGS. 4 to 6) on the tip side. 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, and even when the door 85 is closed, the amount of paper on the internal table 5'' is visible.
It is now possible to do so. The MS (Figures 1, 8 and 9) and LED are a main switch and an indicator lamp disposed on the upper surface of the decorative panel 81 for the chassis right side panel 3C. 37 (Figure J.4) is a join that detects that paper feeder A is connected to machine B.
It is fixedly arranged near the front side of the chassis right side plate 3C. When the paper feeder is connected to the machine B, the position j1 of the paper feeder base seated side is inserted into the positioning hole 116a on the paper feeder A side! It is pressed by the tip of the i-determining pin 116 to turn on and maintain that state, and the fact that paper feeder A 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.
When 5 is heard, the door is turned off, and the door close signal is input into the control circuit as an open signal. However, this door suite
In case S8, the decorative plate 81 on the chassis right side plate 3C is attached
E, and one" - Only when the lid 83 is closed, the protrusions 85b of the door 85 closed by the protrusions 83a on the 81 and 83 sides (the protrusions on the decorative board 81 side are omitted in the figure) It is positioned and held at the position where it acts. When the north plate 81 is removed or the top cover 83 is opened, the switch S8 is held in a position away from the door protrusion 85b even when the door 85 is closed (as shown in Figure 4, the two-dot chain 1 spring). It doesn't turn on even though it's on. Reference numeral 90 denotes a biased box-shaped base 6 of the special equipment section 2 for conveying single sheets of paper.
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 insertion slot 101 on the side of the machine B. When this lamp 90 is turned on, the light passes through a through hole made in the bottom plate 65e of the base 65 and a through hole made in the bottom plate of the cassette insertion slot, and is directed to the light receiving element CdS. Reference numeral 86 (Figs. iN7 to 9) is a movable side plate supported on the inner surface of the chassis left side plate 3d via a bracket 87 so as to be freely repositionable. 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 table 5 according to the width size of the paper to be used. The paper P is loaded and stored on the stand 5 between the movable side plate 86 and the fixed side plate 88 whose positions have been adjusted as described above, with the front side of the loaded paper abutting against the inner surface of the chassis front plate 3b.The stand 5 is approximately It has a 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 5d. (6) Operation (sequence) Fig. 22 are the overall flowchart of device operation 1, 2
3 mainly shows the operation flowchart I of the JiT descending type paper storage mechanism, FIG. This is a timing chart. a. Mount the paper feeder mA on the rail 1131° on the base of the machine B as described above, and set the paper size dial 75.
Turn to align the 11 scale 76 of the paper size to be used with the index 77, and then connect the device A to the machine B. This turns the joint switch S7 on. Mataki 49. For the control circuit B, the paper size conditions to be used are manually input by a switch 104 on the B side of the machine that is selectively pressed by a cam plate 74 on the tire 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 CclS 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 228 of the lifter motor 8 is energized to release the motor from the claw plate 21. After this release, the motor 8 is energized in the reverse direction. As a result, the paper storage table 5 is lowered. When the protrusion 5c on the side of the table 5 comes into contact with the table lowering position sensing sensor S4 due to the downward movement of the table 5, the sensor S4 is turned on. This ON signal cuts off the communication to the lifter motor 8, and after that time (motor stop time) until the motor comes to a near complete stop, iI! Afterwards, the power to the electromagnetic suction device 22 is cut off, the claw plate 21 engages the motor 8 and brings it into the 1]2 state, and the table 5 stops at the downward eye position IN.
= Retained. If the previously used paper is stored in the stand 5'2 and is of a different size from the one to be used this time, remove it, open the top cover 83, and open the iTf moving side plate 83.
Reposition the camera to a position that corresponds to the paper size that will be used this time. Next, a large number of used sheets P, for example, 2000 sheets LW, are stacked and stored on the stand 5. After storing C1 paper, first close the jacket 83, then close the door 8.
Close 5. This turns on the control door switch S8, and the signal 5 energizes the electromagnetic suction device N22 of the lifter motor 8 to release the motor, and then the motor 8 is energized in the forward rotation direction, and the lifter motor 8 is energized. 5 moves -1-1. d. Due to this R movement on the table 5, the lower limit level PL of the second surface level range PL to PH for loading n (the upper surface of P is paper) is reached. At that point, the optical path of the sensor S1 reaches the fourth upward protrusion of the lever 23. A predetermined set timer time starts from the time of the signal (when the upper surface of the stacked paper P continues on the platform 5).
of. The power supply to the motor 8 is cut off after the time period (time to almost reach the lower limit level PH due to the 2y cut) has passed, 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 is placed on top of it. It is stopped and held in position. e. Next, at this point, the first paper sensor S5 in the paper transport path does not detect the presence of paper.
The paper feeding program of the control circuit is started and the conveyance motor 24
The rotational drive is started. At the same time, a momentary pulse is sent to the fil electromagnetic device 36, causing the crank 36 to rotate once.
is turned on, and the paper feed support shaft 33 is driven one rotation. At this time, while the first electromagnetic device Fi, 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 second paper sensor S6 does not detect the presence of paper, the ff52 electromagnetic suction device 52
Power 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 1i1 rolling force transmission path described above. As a result, the paper feed roller 40 is rotated to feed the loaded paper P to the extreme position, and the paper is moved to the leading edge N topo 45-.
45, the sheet is sent out one sheet, and then it is caught between the rotating first flit feed roller 57 and the driven presser roller 59, and the upper surface plate of the base of the special equipment unit 2 for conveying one sheet. The sheet is conveyed toward the tip of the base body 65 through the sheet conveyance gap passage between the sheet guide plate 65c and the drainboard-shaped sheet guide plate 73. During this conveyance, the rotation of the paper feed roller 40 ends, but the fed-out sheet is continued to be conveyed by the rotation of the 111th rt feed roller 57 and the presser roller 59. Phase 8 (roller 4o is one-way crudge 41 due to the way the paper continues to be conveyed even after the active drive is cut off)
The paper is idle-transferred on the shaft 39 via the paper to reduce the conveyance resistance of the paper. f. The transport movement of the paper that has entered the gap path between the base top plate 65c and the guide plate 73 is detected first by the first paper sensor s5 and then by the second paper sensor s6. After that, the second conveyance roller 68a whose leading edge is rotating and the freely rotating roller f03a of the paper feed roller 103 on the machine B side that is in contact with it
The roller 68a and the roller 103a are wedged in between, and the second conveying roller 68b which is freely rotatable at 61167, and the roller 10 on the paper feed roller side facing the second conveying roller 68b with a small gap therebetween.
3a smoothly without getting caught, and then moves forward a little further to reach ), (/(li
By stopping the rotational drive of the 14th frjj; A roller 57 and the second conveying roller 68a interlocked therewith at the timing when the lower claw conveying movement stops when it reaches the line 0-0 (FIGS. 7 and 14). Transport is stopped. Stopping the driving of the first and second conveyance rollers 57 and 68a is as follows:
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 is detected by the first paper sensor S5.
, and then when the second paper sensor S6 detects the detection signal, the number of pulses is calculated by the rotating encoder river gear cutting circle HH3t and the photoelectric element T-31a (Fig. 13). The 2'IE magnetic device N starts at the 117th point where the preset number of pulses is applied
52, the pawl arm 52a engages the νJ rear clutch ring 51 of the clutch 50, and the flange 5o 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 rotation of both rollers 57 and 68a after the rotational drive of the first and second conveyance rollers 57 and 68a is cut off. - It is calculated from the paper movement maximum based on the inertial rotation of 68a, and is set in advance in the control circuit. The set number of pulses can be freely corrected later as necessary. Further, after it is detected that the leading edge of the paper has passed the position of the second paper sensor s6, the paper-out lamp 90 is turned off, and the indicator lamp LED changes from blinking to continuous lighting. Then, the paper feed roller 103 on the machine B side is rotated by the sequence program on the machine B side for the paper whose leading edge coincides with the base line O-0 position and whose conveyance is stopped. Wait until the The trailing edge of this waiting paper is located between the paper feed roller 40 and the 11th general feed roller 57 when the paper size used is small, and from the paper feed roller 40 when the paper size is large. I haven't cut it yet. Therefore, in either case, when the paper is on standby, both the first and second paper sensors are held in the on state due to the presence of the paper on standby. 1- The standby paper is stored on the machine B side until the predetermined timer 11ij (at least the paper refeed time for continuous copying on the machine B side or longer, for example, about 1 to 2 seconds) has elapsed. If the paper feed roller 103 does not feed the paper m again, the power to the transport motor 24 on the paper feed device A side is temporarily cut off to save power when the timer time elapses, and then the motor stops b. (about 2 seconds), the power supply to the second electromagnetic device 52 is also cut off, and the paper feeding/transportation is stopped and stands by. g. When the paper feed roller 103 on the machine B side is rotated by the sequence program on the machine B side), the leading edge of the waiting paper is connected to the 21st feed rollers 68a and 68b and the paper feed roller 103. The paper is sandwiched between the paper feed rollers 103 and pulled from the eight paper feed devices to the machine B side by the rotational force of the paper feed roller 103, and is drawn into the machine B. At this time, the paper feed rollers on the paper feed device A side 40, 1st and 2nd
Although the conveyance rollers 57 and 68a1 are not actively rotated, each of the rollers 40 and 57@68 described in
A is attached to each support shaft 39 @ 56 67 via a one-way clutch 4l-58-68C, so as the waiting paper is conveyed by the paper feed roller 103 on the A side of the machine. As soon as both of them idle and the conveyance resistance is reduced, when the trailing edge of the paper passes the first paper sensor S5 position as the standby paper is pulled toward the machine B side, the sensor When S5 is turned off and the signal is turned off, the transport motor 24 is energized when it is stopped, and when the second electromagnetic device 52 is de-energized, the device 52 is energized. is energized (therefore, clutch 50
(hold off). Next, the instantaneous current is extended to the first electromagnetic device 36, and the one-turn clutch 34 is turned on, and the paper feeding support shaft 33 is turned on.
The paper feed roller 40 is rotated by driving one rotation of the paper feed roller 40 . By rotationally driving this paper feed roller 40, λJr is transferred to the table 5-.
The paper next to the war paper P is sent out to one sheet, and its leading edge is rotated by an il transport roller 57 and its passive roller 5.
Until the paper feed roller 40 finishes rotating, a loop of paper 7 is formed between the first transport roller 57 and the U-ra 40. The preceding paper When the rear edge then passes the sensor S6 position, the sensor turns off and receives the signal), and then the second electromagnetic device 52 is de-energized and the clutch 50 is turned on. The first and second conveyance rollers 57 and 68
The rotational drive of a is started. This allows the top plate 6 of the base 65 to
The paper is introduced into the paper conveyance gap passageway between the drainboard-shaped paper guide plate 73 of 5C. When the leading edge of the paper passes the second paper sensor S6 position, the switch S6 is turned off, and based on that signal, the encoders 31 and 31a start pulse running I, and after counting a predetermined number of pulses, the second electromagnetic By energizing the device 52 and turning off the clutch 50, the paper next to itA is brought to a standby state with its leading edge aligned with the base line 0-o. The trailing edge of the preceding sheet is the leading edge of the next sheet of paper, and the leading edge of the next sheet is the second one-way feed roller 68a.
68b and the freely rotating roller 103a of the paper feed roller 103 of the wooden board B fllη, the support has already come out from between both rollers. It should be noted that the speed at which the preceding paper is drawn into the machine B by the paper feeder 44+103 on the side of the machine B is relatively fast, and the trailing edge of the preceding paper is detected by the first paper sensor s5, and based on the signal. When the leading edge of the next sheet fed out by the rotation of the paper feed roller 40 reaches the first conveyance roller 57, the trailing edge of the preceding sheet has already reached the second sheet sensor S6. The 11th order sheet is successively conveyed by the rotational drive of the 1m-th conveyance roller 57 without forming a loop. i, Jl The next paper in the standby state is introduced into the machine B by re-rotating the blank paper roller 103 on the machine B side. j, and thereafter, when the paper feed roller 103 on the B side of the machine is rotationally driven iσ, on the paper feed device A side, the waiting paper of -J-g-h・i is introduced into the wooden board, and the next paper is introduced into the wooden board. The cycle of transporting one sheet of paper and waiting is automatically repeated. k. When, for example, about 20 to 30 sheets of paper P on Jj'j on table 5 are consumed, the two-sided position level 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, the platform 5 is moved upward, and the upward movement is stopped after a certain period of time has elapsed. At this time, the second side of the paper has almost reached the upper limit level PH. The paper feeding mechanism that feeds one sheet from the uppermost position of the stacked paper P in the top A of this table 5 is the paper feed mechanism that feeds one sheet from the top A of the stacked paper P. The paper is delivered to the special equipment section 2 by the 4rf conveyed by the rotation of the paper feed roller 103 on the AB side. Thereafter, as the paper is sequentially consumed, the level decreases to the permissible limit PL. The loading movement is automatically performed intermittently and the two-sided position level of the stacked paper P is always at >j! when all the paper on the table 5- is consumed. It is linked to the 111 volume range level P H-P L of. Thus, the example of setting Jt'j on stand 57 is 2000.
It is possible to continuously feed a large number of sheets P to the wooden board B as long as the image forming apparatus B is in operation. Also, even if the paper drawing speed 1■ by the paper feeding means 104 on the B side of the machine changes due to changes in magnification, etc., the paper in the X1 line and the next paper in the paper feeding device A may not maintain the same speed depending on the model. Even in the case of various types of light, since the sheets are always fed and conveyed at intervals, there is no possibility of sheet feeding errors or troubles caused by the leading edge of the next sheet catching up with the trailing edge of the preceding sheet. ■Sequential consumption of stacked paper P on stand 5''2, 111R on stand 5
"Next intermittent" - When A advances and the top surface position of the table 5 itself exceeds the lower limit PL of the paper top surface position level, at that point the protrusion 5C on the table 5 side contacts the table upper limit position sensor S3 and this sensor is turned on. Then, the signal is manually input to the control circuit. then gold 5
When the feeding of the remaining sheets of "-" progresses and the last sheet is sent out from the table 5"-2, the optical path of the sensor S1 is opened by the large tilt rotation αLL of the lever 23, and the signal is sent to the control circuit. Man-powered. And the sent out/li
The next paper is waiting in the special equipment section 2, and then the paper! , the first sensor S5 or the first and second sensors by being introduced to the IB side.
At point 114j, where both sensors 55 and IIS 6 are turned off, the paperless lamp 90 is turned on, and the indicator lamp LE is turned on.
D becomes a dotted state. When the paperless lamp 90 lights up, the light receiving element Cd on the B side of the machine
When light is applied to S, the out-of-paper display/warning circuit on the B side of the machine is activated, and a warning is issued to indicate that there is no paper left in the paper feeder A side. Generally, in this machine B, the mechanism operation is automatically stopped when the display/warning circuit is activated. m. Then, when you open the door 85 of the paper feeder to replenish paper, the table 5 will automatically lower to the lower limit level and stop, as described above, so you can load a large number of sheets of paper onto the table 5 again. Load and store. Then, by closing the door 85, the sequence of items C to H is executed again, making it possible to continuously feed a large number of sheets. (7) Intermittent sequential upper M of the table 5 due to sequential consumption of stacked paper P during abnormality,
During the movement, the upward movement of the table 5 causes the upper surface position of the paper to reach the permissible level. When the top surface of the sheet rises too much, the third upward protrusion 23c contacts the sensor S2 due to excessive rotation of the lever 23, and it is detected that the top surface of the sheet rises too much. Based on the detection signal, the lifter motor 8 is reversely rotated and the table 5 is moved downward. The sensor S detects that the two-side position of the stacked paper is lowered and the position H is lower than the lower limit level PL of the paper level range (<7).
1, or when the sensor S3 detects that the J two sides of the white 5 are F two higher than the detection level of the sensor S3, the lifter motor 8 is rotated in the normal direction based on the signal. 5.1 redo y movement is performed for a certain period of time. This stand 5
The cause of the abnormality naturally disappears due to the upward shift of 1'g' and 1'g', and the lever 23 and sensor S1 work to move the stacked paper to a position where it is within the normal upper limit level range PH-PL. When the A movement stops at 5-, the control circuit determines that the abnormality has disappeared. Automatic lowering of platform 5 ◆
1 given 1-3'? If the cause of the abnormality does not disappear by itself and the paper upper surface too high sensor S2 is activated, the lowering Φ and upper y operation of the table 5 described in 1- is repeated several times until the number of times set in the control circuit is reached in advance. If there is no recovery as described in -1-, the control circuit determines that there is an abnormality in the apparatus, and the operation of paper feeder A is stopped, and a warning buzzer built into the apparatus is activated to notify the operator of the abnormality. ing. In other words, the malfunction of the paper "two-sided" excessively smeared sensor S2 due to the paper's folding, which can be naturally removed by lowering and re-raising the Sendai 5 once or several times within a certain range, is a cause. If there is an abnormality in which the two sides of the paper rise too high, the abnormality is removed by the control circuit's automatic lowering and resetting of the table 5, and normal paper feeding is automatically performed without the warning buzzer activating. Operation continues. Regarding the lowering of the woman 7 of the platform 5, even after a certain timer period preset in the control circuit has elapsed since the start of the upward or downward movement of the platform 5, the paper top surface level sensor S1 or the platform R'2 limit sensor S3 is activated. , or Takashi Daishita [If the limit level sensor S4 does not operate, it is determined that there is a device error in the control circuit motor abnormality check routine, and in this case, the operation of the paper feeder A is also stopped. J (8) Friction clutch mechanism (Figures 7 and 17) in which the Y-notification buzzer is activated. Mechanisms 69a to 69d intervene to eliminate the following troubles. 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 lO3, so that the second conveyance roller 68a
It is pushed down further against the spring plate 67b than when it is in contact with the freely rotating roller 103a of 03, and is brought into contact with the lower surface of the paper feed roller 103 with a considerably strong pressing force due to the reaction force of the spring plate 67b. be. If the second conveying roller 68a is forcibly rotated against the strong pressing force against the paper feed roller 103 in such a state, the rough 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 second conveyance roller 68a, and the roller 68a is not forced to rotate, so the problem of scraping of the paper feed roller 03 does not occur. . It can be arbitrarily set by selecting or adjusting the tension force of the friction clutch force spring 69d of the friction clutch mechanism. (9) Loading mechanism (7th temple 18 and 19) A mechanism 78a that applies a rotational load to or releases the load on the first conveyance roller shaft 56 in conjunction with 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 general transport process due to the rotational drive of the first and second paper transport rollers 57 and 68a,
The negative front state is different between the case of transporting small size paper (B5 medium A4 (horizontal transport)) and the case of transporting large size paper (B4 (MT transport)). 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.
The paper transport resistance by the transport rollers 57 and 68a is kept as low as possible by idly rolling on the shaft 39 at 4'F with the movement of the paper, but it is not zero, and the paper on the paper feed roller 4o is Pressure force and idling resistance act on paper m as a conveyance load. By the way, in the case of conveyance of small size paper, paper m conveyed by the 11th general feed roller 57 is transported by the rear!I1.l during its conveyance.
The edge comes out from under the paper feed roller 40, and from that point on, the conveyance continues for a while without the above-mentioned conveyance load by the roller 40.
As the drive of the 7Φ68a is stopped due to the clutch 50 being turned off as the encoders 31 and 31a count up a predetermined number of pulses, the conveyance is stopped. However, in the case of transporting a large size 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. That is, in the case of small size paper, the transport load at the transport stop IRj is light, and in the case of large size paper, it is heavy. Therefore, the predetermined number of pulses set in the circuit of the encoder 31φ31a is set, for example, based on the conveyance of small-sized paper, so that the leading edge of the paper coincides with the line o-0 and stops.
If the number of coefficients is set, when a dog-sized sheet is conveyed, the sheet will stop before the leading edge of the sheet reaches the base line O-0 due to the above-mentioned heavy conveying load. On the other hand, if you set the conveyance of large size paper to Q, then the leading edge of the paper will be slightly above the base line 0-0 because the conveyance load is light when conveyance is stopped when small size paper is conveyed. The overrun state occurs and the paper is stopped. Then, the m paper stops before the leading edge reaches the base line O-0, and it is transferred into the machine B by the paper feed roller 103 on the machine B side. If the paper is fed at 0-0, there will be a slight delay in paper feeding with respect to the progress of the image forming process in machine B.On the other hand, the leading edge will overrun the 0-0 norm line and the paper will stop. If this is done, excessive paper loops will be formed before the timing roller on the machine B side when the paper is introduced into the wood aB, causing jams and troubles. In the seventh issue 18 and 19, 78a is the force 11 fixed to the shaft 75a of the paper size indication dial 75, and 78b is the force 11 fixed to the base 65.
This is a reciprocating rod that is freely slidable in the front and back direction by means of a pin 78C and a long hole 78d on the back side of the upper surface plate. The advancing/retracting rod 78b is constantly moved forward by a tension spring 78e, so that its tip end surface is always pressed against the surface of the cam 78a. As the dial 75 is rotated, the large diameter part of the cam 78a corresponds to the tip surface of the retractable rod 78b, and the retractable rod 7'8b
moves backward against the spring 78e. When the small diameter part responds, it moves forward. In this example, when the 84-size scale (large size paper) on the dial 75 is aligned with the index 77 (Fig. 78. b is maintained in the retracted position. 78f is a body of a coil spring which is fixed to the first conveying roller shaft 56 and has a seat 78g on the left end side, and 78h is a coil spring mounting body 78g on the right end side which is loosely fitted and supported by the vehicle 56 on the right side.
The coil with i has a spring winding on the body, 78j has the above two spring windings on both the bodies 78f and 78h, and the coil spring can be wound with force, and 78 has the right spring winding on the body. The catch 1 formed on the outer surface of the seat 78i of 78h is a claw. When the advancing/retracting rod 78b is held in the forward position, the rear end of the rod moves away to a position where it does not interfere with the locking pawl 78, which is due to the rotational drive of the first conveying roller shaft 56. Accompanied by the above left and right coil spring windings 78f and 78
11. The entire coil spring 78j is in a rotating state 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 the above-mentioned engagement +1-. It is in a position where it interferes with the pawl 78, and at this time, when the first conveyance roller shaft 56 is rotationally driven, the right spring winding drum 78h moves forward and backward with the advancing and retracting rod 78b.
Rotation is prevented by the engagement of the rear end 81 (with the locking pawl 78), so that the shaft 56 is connected to its body 78h and the coil spring 7
It rotates while creating frictional slip between it and 8j. That is, the frictional slip force acts on the shaft 56 as a rotational load. Now, the predetermined pulse count number set in the circuit of the encoder 31/31a is set to the number of counters at which the leading edge of the paper stops when the leading edge of the large-sized paper coincides with the base line O-0, based on the conveyance of the large-sized paper. Dial 75
When adjusted to 84th edition, which is a large size paper, the advance/retreat lever is 78.
At the rear end of b, the spring winding on the right side escapes from the barrel 7811, so the above-mentioned rotational load is not applied to the l1la feed roller shaft 56 of f51. Therefore, the paper comes to a stop with its leading edge aligned with the base line 0-0. - - Turn dial 75 on large size paper, A4 or 8
When adjusted to the 5th edition, is the rear end γ of the advance/retreat rod 78b? Since the barrel 78h is hooked to the right spring winding at 8, the above-mentioned rotational load acts on the support 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 small size paper also stops when its leading edge substantially coincides with the base line 0-0. As explained above, by applying a load to the first conveying roller shaft 56 when handling small-sized paper and not applying that load when handling large-sized paper, the paper stops at the O- position regardless of the size. 71V, which is almost the same as 0, can be generated. 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 a cam 78 is used to control the size instruction operation of the dial 75.
The above-mentioned set pulse count number may be changed by turning on/off the switch k (FIG. 20) by turning a. (10) Others Before: In the A descending paper storage mechanism of item (2), the sprocket 17 (tn 4 and 7 figures) is attached to the shaft 12 via the one-way clutch 16, so service personnel, etc. When inspecting or repairing the paper feeder A, the joint switch s7 was turned on artificially, and the door switch S8 was turned off by opening the door 85, causing the fj 5 to move downward. Even if the platform 5 is forcibly stopped 1 due to a hand or other object being caught between the descending platform 5 and the chassis bottom plate 3a, the sprocket 17 is rotated by the reverse driving force of the motor 16 due to the presence of the one-way clutch 16. The table 5 is not forced to descend due to idle rotation, which prevents hands or objects from being caught in the tray 5, and prevents overload from being applied to the motor 16. Large-capacity paper storage section l When the paper feeder jQA is not in use, the conveying section 2 protrudes forward from the front panel of the storage section so that it can be rotated sharply around the shaft 57 in a substantially hanging state and folded into the front panel of the storage section. (11) Main points of the present invention In short, the present invention has a large-capacity paper storage section that can store a large number of cut sheet papers, and a paper storage section that is connected to the storage section. ,
A paper transport unit that fits into one paper cassette insertion unit of the image forming apparatus, a paper feed mechanism that feeds out the sheets of paper from the paper storage unit to the paper transport unit one by one, and a paper feed mechanism that feeds the fed sheets into the paper transport unit. A paper transport mechanism that transports the paper to a predetermined position 11 and then stops and waits, and a paper transport mechanism that is arranged in the paper transport section corresponding to the light receiving element for detecting paper out that is arranged on the image forming apparatus side, and a paper storage mechanism that transports the paper to a predetermined position 11 and a light source that lights up when the last sheet of the set is conveyed to the paper conveyance mechanism and fed to the image forming apparatus side and irradiates the above-mentioned light receiving element, and the light source illuminates the light receiving element when there is paper in the sheet conveyance section. or when the paper on standby is fed by the operation of the paper feeding means on the image forming device side, one sheet of paper on the large-capacity paper storage section side is automatically fed out and conveyed, and the paper is conveyed f.
The paper feeding mechanism and the paper transport mechanism are operated in conjunction with each other so as to stand by at 3Jf, and the light source is turned on when the last sheet of paper is fed, causing the image forming apparatus side to stand by. Paperless display・5. ? The gist of the present invention is a paper feeding device characterized by operating a warning circuit. That is, the paper feeder of the present invention is capable of inserting paper from the paper feeder side into the cassette insertion slot of the machine for general various paper cassette insertion type image forming apparatuses that do not have a built-in multi-sheet deck mechanism. When a cassette is inserted into the conveyance section, it is inserted in the same way and used in combination. Since there is a large capacity paper storage section on the paper feeder side, a large number of sheets, such as 1000 sheets, 2000 sheets, etc., can be printed continuously on the machine side. It becomes possible to execute copying etc. to the end without interruption. Then, when the machine's paper cassette is inserted into the machine's cassette [1], the machine feeds the paper into the paper transport section of the paper feeder, which is inserted into the machine's cassette. The next sheet of paper from the storage section is automatically fed out and conveyed, and is immediately replenished into the paper conveyance section and then placed on standby.A signal line is used to exchange paper feed timing, etc. between the machine and the paper feeder. is not necessary. Also, the fact that the paper on the paper feeder side has been completely consumed is optically transmitted to the light receiving element on the machine side by turning on the light source, and is manually input to the control circuit on the machine side. In other words, to connect the paper feeder to this machine, all you have to do is insert the paper feeder's paper transport section into the paper feeder's cassette insertion slot and physically insert the horn cent into the machine. Therefore, it can be used in a wide range of combinations with the various paper cassette-type image forming devices currently on hand. Large capacity - Effective and suitable as an automatic paper feeder.

[Brief explanation of the drawing]

The drawings show an embodiment of the paper feeding device of the present invention, and FIG. 1 is a partially cutaway side view of the paper feeding device connected to the image forming device, FIG. 2 is an exploded perspective view of the pedestal, and FIG. Figure 3 is a cross-sectional view of the rail with one roller installed, and Figure 4 is the right side! Figure 5 is a right side view with the It plate removed, Figure 5 is a left side view with the left side plate removed, Figure 6 is a vertical right side view, Figure 7 is a cross sectional plan view,
8 is a longitudinal sectional front view taken along the line (8)-(8) in FIG. 7, FIG. 1 minute enlarged plan view, Fig. 11 is an enlarged plan view of paper detection ripping bar fIB, Fig. 12
The figure is a side view of the same, Figure 13 is an enlarged side view of the gear train of the paper feed/conveyance mechanism, Figure 14 is a plan view of the paper conveyance/special unit, and Figure 15 is the paper conveyance/# before connection. -1j A side view showing the state of the machine part, Figure 16 is an enlarged side view of the paper size designation dial part, Figure 17 is an enlarged plan view of the friction clutch mechanism part, Figure 18 is a slope view of the load mechanism part, 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, Fig. 21 is the control circuit of the beam Tsukumorph, Fig. 22 is the overall broachyard of the device operation,
FIG. 23 is an operation flowchart of the elevating paper storage table mechanism, FIG. 24 is an operation flowchart 1 of the paper feed/conveyance/standby mechanism, and FIG. 25 is a drive timing diagram of the beam motor. A is a paper feeder, 1 is a large capacity paper storage section, 2 is a transport section,
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. Figure 24 Figure 25 Procedure Amendment (Method) 1 Showa 5 & L March 24
Display of JY note 1985 11 Imo Fraud Request No. 185967 23 Name of the name of the inn 1. Place name 1) The description is amended as follows: Page line Error Correct 12 6 (Figure 7φ9) (Figure 798 ・] Figure 11 ll
11 Roller 7-7, Roller 7・714 7 Forward rotation drive a Forward rotation drive b//14 Reverse rotation drive b Reverse rotation drive a15 3 (Figure 10) (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 //12 Claw arm Claw arm 52a29
End 67 67 (611th
Figure 7) 3012/13 68C68C (Figure 6) 311
5 Length dimension Thickness dimension 32 5 70 70 (Figure 7) ll 10
Pulley 68 Pulley 69//19 Pulley 68
Pulley 6935 8 79a@79b 78/79
37 15 90 90 (Figures 6 and 7)ll
18 dS dS (Fig. 1Φ15)
ll end plate 65e plate 39 4
Above Above (1) 4110 Lower limit "-eye //19 36 344513
Sensor sensor s5/564617 rotation reduction
reduction 48 2 65C of 65C of 50 8 always until always // 15
104 103 54 end 68 6956
8 Interlocked Interlocked 5914 Large size Large size 6113 Large size Small size 63 8 Motor 16 Motor 8 // 10 Motor 16 Motor 8 // 13 Axis 57 Axis 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 many sheets of cut sheet paper, a paper transport section that is connected to the storage section and fits into the paper cassette of the image forming chain, and a large-capacity paper storage section. A paper feeding mechanism that feeds sheets of paper from a storage section to a paper transport section one by one, a paper transport mechanism that transports the fed sheets to a predetermined position in the paper transport section and stops (standby), and an image forming apparatus. The last sheet of paper in the quick paper storage f;lj is conveyed to the paper conveyance section-2, which is disposed in the sheet 1 general feed section in correspondence with the light receiving element for detecting paper out, which is disposed on the side. Lights up when paper is fed to the image forming device.
- When there is no paper in the paper transport section, or when waiting paper is fed by the operation of the paper feeding means on the image forming apparatus side. The paper feed mechanism and paper transport mechanism are operated in conjunction with each other so that one sheet of paper from the large-capacity paper storage section is automatically fed out, transported, and is placed on standby in the paper transport section. A paper feeding device characterized in that a paper out display Φ warning circuit on an image forming apparatus side is activated by light irradiation on a light receiving element caused by lighting of the light source as the paper is fed.