JPH03128823A - Sheet feed tray of recording device - Google Patents

Abstract

PURPOSE:To settle and lock a sheet feed tray at an arbitrary position by installing a locking member at a locating member so that it may displace freely between its contact position and its non-contact position with regard to a guide rail. CONSTITUTION:The end of a record sheet is located by locating member. A locking member (stopper lever) 111c may be fixed at the locating member so that it may oscillate, and with the above oscillation, the locking member 111c is displaced selectively between a contact position and a non-contact position with regard to a guide rail 111g. At this time, the locking member 111c is pressed and forced by an elastic member in a contact direction with a guide rail 111g. By the action of the locking member 111c, a sheet feed tray 111 is settled and locked at an arbitrary position for a recording device such as a copying machine.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feed tray for a recording device, and more particularly to a paper feed tray that can be used in a copying machine.

2. Description of the Related Art When a copier equipped with an automatic document feeder (hereinafter referred to as ADF) continuously copies a large number of originals, page alignment between the original and the copy becomes an important issue. On the other hand, in order to check the image quality of a completed copy, it is desirable that the copy be discharged face-up onto the discharge tray with the copy side facing up.

In order to meet all of these requirements, that is, to align the pages of the copy in a face-up state and also align the pages of the copied original at the same time, it is necessary to install a reversing mechanism in the ADF and feed the original from the last page. Although this is possible, there is a drawback that the ADF device becomes larger. By the way, for the purpose of checking the image quality, the face-up state is not required for all copies, but for example, when there is only one original page or when many copies of the same page are required. Required when alignment is not required.

Purpose The present invention has been made in view of the above points, and it is possible to align the pages of both copies and originals, and when page alignment is not required, the copies are automatically ejected in a face-up state. The object of the present invention is to provide a copying device that uses the following methods.

A further object of the present invention is to provide a paper feed tray that can be used in a recording device such as a copying machine and has a paper positioning mechanism that can be stopped and locked at any position. shall be.

3- Configuration The configuration of the present invention will be described in detail below based on specific examples. FIG. 1 is an overall schematic diagram showing an electrophotographic copying machine as an embodiment of the present invention.
An automatic document feeder (ADF) (b) and a sorter (c) for automatically sorting output copies are attached to the machine.

In the copying machine main body (A) of this example, as shown in FIG. 2(a), the upper part under the paper conveyance path can be opened upward as an upper unit using both rear ends of the machine as fulcrums. Maintenance such as removing jammed paper and replacing the light drum becomes convenient. The locking mechanism for the left and right front doors 01, 02 (second (
a) When you open the machine (see figure) and pull up the release lever 03 at the top center, the wire 04 is pulled into the machine, the lever 05 and the shaft 06 move inward, and the upper frame 07 is unlocked. The upper unit is lifted by the force of the gas spring 08. In addition, left and right front doors 01
．． 02 are each provided with a safety switch (not shown), and when opened, the output of each predetermined part is turned off.

A photosensitive drum 1 having a photosensitive layer coated on the circumferential surface of a cylindrical conductive gas is rotatably supported in the unit, and in this example is driven to rotate at a constant speed in the direction of the arrow. Since the sensitivity of the photosensitive layer varies significantly depending on its surface temperature, the temperature is controlled by a drum thermistor 2 to an appropriate temperature of, for example, about 30°C. The drive mechanism for the drum 1 is constructed as shown in FIG. 3(a). When the main motor is turned on, the drum drive pulley 1b rotates via the timing belt 1a, and the inner drum flange 1e rotates via the drum drive gear t1c and the drum ring gear 1d. The photosensitive drum 1 is pressed against the front drum flange 1g by the face plate 1r, so that the rotation of the drum drive pulley 1b is transmitted to the photosensitive drum 1. Further, the front drum flange 1g rotates a driving fur brush of a cleaning unit and swings a cleaning blade 1, which will be described later. Note that 1h is a drum heater that heats the drum to an appropriate temperature, and 11 is a drum shaft. Furthermore,
The photoreceptor drum 1 has a misalignment prevention mechanism. That is, as shown in Figures 3(b) and 3(C), when the cover is opened and the face plate is removed, the housing is (Drum drive) Deflection of 1j is prevented by screw 1k. The screw 1 and the housing 1j are designed to come into contact only when the cover is opened. Further, this screw 1 is positioned using a jig, so no adjustment is required. In addition, 1°C is 1 m with 1 or more drum fall prevention brackets.
is the main body frame.

In FIG. 1, near the circumferential surface of the photosensitive drum 1 and on the downstream side of the drum thermistor in the rotational direction thereof, a charging charge v3 that uniformly charges the circumferential surface of the photosensitive drum 1 is disposed. . As shown in FIG. 4, the charger 3 of this example is composed of two carbon-coated tungsten wires 3b stretched in a grounded casing 3a, and the tungsten wires 3b have a temperature of 7.1'K.
By applying a positive high voltage of V, a positive corona discharge is generated and a positive charge is uniformly applied to the surface of one circumference of the photoreceptor drum. Further, a ventilation hole 3C is provided in the casing 3a, and a fan 3d is used to ventilate the inside of the casing to prevent uneven charging. Further, in order to prevent uneven charging due to dirt, the charging wire 3b is sandwiched between rubber cleaners 3e, so that the wire 3b can be cleaned by pulling out the charging unit.

For downstream measurement of this charger 3, there is an eraser 4 that erases charges in unnecessary regions that do not correspond to the image, such as the leading edge, trailing edge, left and right edges, and prevents waste of developing toner, etc.
is installed. The eraser 4 of this example is composed of 68 yellow-green LEDs, which reduces drum fatigue and enables precise control of the irradiation width.

An exposure section 5 is disposed downstream of the eraser 4 and irradiates the surface of the photoreceptor drum 1 with an original image to form an electrostatic latent image. The exposure section 5 is provided with a fifth (
a) Reflected light from a document shaped into a desired size is supplied by an optical system unit 6 configured as shown in the figure. In the optical system unit 6 of this example, the light irradiated by the halogen lamp 6a hits the original plate and is reflected, and this reflected light is transmitted to the first. Second. The light is shaped into a desired size and irradiated via the third mirrors 6b, 6c, and 5d, the through lens 6e, and the fourth mirror 6f. In this case, elements from the halogen lamp 6 to the third mirror 6d are scanned together along the Lo direction according to the document length Lo, and this operation is shown in FIG. 5(b) in this example. Like, servo motor 6
8- As a source, two scanners 513 ('3+) are moved back and forth using two scanner wires.
This makes speed control accurate and easy during variable-magnification copying.

Due to the movement of the lens 6e during variable magnification copying, the imaging position shifts and the focus goes out of focus. In this example, to correct this, the position of the second gap 61 is changed as appropriate. That is, the fifth
As shown in FIG. 5(C) and FIG. 5(d), when the lens home position 6J is turned on, the mirror shift cam 6g rotates together with the variable power cam pulley 6, and the cam follower bracket 6rr
l moves and shift mirror w t6n loosens. and,
The mirror shift pulley 6a fixed to the wire 6n rotates, and the elastic force of the mirror shift spring 6p is transmitted to the scanner drive wire 6q to move the second scanner.

A lens position detection disk 6'' is provided at the end of the variable magnification cam pulley 6 to detect the magnification. As shown, the platform detection protrusion a is on one end surface 6r+ for detecting the platform, and the end surface 6r= on the Ikegata side is used for detecting the I8 rate.

Projections c, d, e, r, and 9 are formed at 0.865 times, 0.816 times, Q, 707 times, and enlarged amounts.

When the main switch is first turned on, the disk 6r rotates clockwise to search for the lens home position, and the lens home sensor 6S is activated. After this, disk 6r
starts to rotate in the reverse direction, and the lens drive motor stops when the magnification sensor 6t is turned on by the can part of the end face 6r2 for 1g rate detection. From then on, unless the power is turned off, the position is input and stored in the drive control means and the specified CPU, and when the next magnification is specified, the direction of rotation of the lens drive motor is determined, and the protrusion c- g turns on the magnification sensor 6 and turns off the lens drive motor.

Next, scanner speed control will be explained.

The circuit for implementing speed control is constructed as shown in FIG. 5(g). In Figure 5(g), "PL L"
The phase of the encoder output is compared with the REF clock signal from CPtJ. This is because the scanner return position and stop position are determined by the encoder output (number of pulses), so phase comparison is performed to prevent uneven rotation, and the rotation of the motor is controlled. “F-B
IAS"' switches the bias voltage during forward rotation and reverse rotation. "PHASE" corrects the phase difference between the electrical signal and the motor rotation. "RE"
In "V", one inverting amplifier is killed and the voltage applied to the motor is switched. In "G" and "G", the amplification factor is switched to increase during high-speed rotation (reverse rotation, speed reduction, and braking).In addition, the LEAD signal and The phase difference of LAG signal is π/2
It is. The scanner operations performed thereby are classified into eight types as shown in Table 1.

11H: High level L: Low level Also, the scanner speed instruction is performed by a combination of B0-B7 output signals from the CPU. The speed is (1)
Scanner movement when the main switch is turned on (2) Forward rotation, but varies depending on the magnification (3) Reverse rotation (4) Deceleration (while reversing) (5
) 12- types of brakes, etc. When the speed instruction signal is output from the CPU, the motor is not yet rotating, so D-A
There is a large difference between the conversion (speed instruction) output and the F-V conversion (motor rotation) output, and this is further amplified by inversion amplification.

However, the motor does not rotate because the scanner on signal is not output.

When the scanner on signal is output, the motor starts rotating via the driver. As the motor rotates while accelerating, the difference between the DA conversion output and the FV conversion output becomes smaller, and eventually becomes approximately zero, causing the motor to rotate at a constant speed. Such operations are performed in response to each scanner speed instruction. The above-mentioned exposure optical unit 6 and exposure section 5 are completely disconnected from the parts surrounding the drum, the fixing section, etc., which will be described later, to prevent contamination of optical components such as mirrors by toner, silicone oil gas, etc. Ru. Note that the optical path is sealed by a dustproof glass 5a.

Returning to FIG. 1, a developing section 7 for visualizing the formed electrostatic latent image is disposed downstream of the exposing section 5. As shown in FIG. 6(a), the developing section 7 of this example includes a developing sleeve 71 equipped with an appropriate number of magnets inside, and a layer thickness of the developer carried and conveyed on the sleeve 71. It consists of a doctor 72 that regulates the amount of developer, a developer tank h that supplies a developing agent onto the developer sleeve, and a toner replenishment tank S that stores replenishment toner from a toner cartridge C, and the developer is separated from carrier and toner. A two-component developer is used. A paddle wheel 73 is rotatably disposed at the lower part of the developing tank h, and draws up the developer and supplies it to the surface of the sleeve 71.

A pre-doctor 7 is placed above the paddle wheel 73.
4 and a rectifying plate 75 are provided to increase the agitation efficiency of the toner and developer, increase the amount of charge of the toner, and prevent background stains on the image. That is, the developer that is pumped up by the paddle wheel 73, carried on the surface of the sleeve 71, and conveyed is first regulated in advance by the pre-doctor 74 to promote friction due to agitation between the toner and the developer, and the toner is not charged due to insufficient agitation. A decrease in volume is prevented. The rectifier plate 75 is regulated by the doctor 72 due to the regulating effect of the pre-doctor 74, and the flow rate of the developer flowing to the agitation separator 76 decreases, making the concentration control by the toner concentration sensor 77 provided in the path of the separator 76 unstable. In order to prevent this, the phenomenon agent regulated by the doctor 72 is guided so as to smoothly flow onto the stirring separator 76. The toner concentration sensor 77 is connected to the bobbin 7
The coil 77tl is placed on the inner circumference of 7a, and the bobbin 77
Changes in the amount of carriers made of ferromagnetic material in the developer falling inside a are detected by changes in the self-inductance of the coil 77b due to this passage.

Further, a conveying auger 7 is located below the inlet of the stirring separator 76.
8 is arranged so as to be rotatably driven, and stirs the developer falling from the inlet of the separator 76 in the lateral direction (width direction of the sleeve 71) to equalize the flow rate of the developer in the lateral direction as well, thereby eliminating density unevenness. This prevents the occurrence of A stirring agitator 79a is rotatably disposed in the toner replenishment tank S, and a replenishment roller 79b is provided in the communication portion with the developer tank.
The replenishment roller 79b is arranged to be able to be driven one rotation by 15 seconds, and the replenishment roller 79b is appropriately driven according to the detected value of the toner concentration sensor 77 to control the toner concentration. In addition, in order to prevent the toner accumulated in the inlet seal portion 71a from adhering to the drum 1 and having an adverse effect on the development (black spot stains, etc.), the upper cover of the developing section is installed as shown in Figure 6 (b). A developing tapping solenoid 71c is provided at the developing sleeve 71b, and the upper cover 71b is vibrated to drop the toner accumulated on the inlet seal 71a onto the developing sleeve 71.In order to prevent background staining and adjust the image density, a developing tapping solenoid 71c is provided on the developing sleeve 71. A positive bias voltage of 100 to 730V is applied.

The circuit for controlling the toner density is constructed as shown in FIG. 6(C). According to this, first, the inductance of the detection coil 771) changes due to a change in toner il by 1 degree, and the detection oscillation frequency changes due to this change in inductance. This and the reference oscillation frequency are added, and then integral amplification, detection, and DC amplification are sequentially performed. That is, when the toner density is lower than the set value, a low level toner replenishment signal is output to the CPU, and vice versa, a high level toner replenishment signal is output to the CPU to control the toner density.

A transfer section 8 that transfers the toner image formed on the surface of the photoreceptor drum 1 onto a transfer paper is provided downstream of the gap section 7 . The transfer section 8 of this example includes a pre-transfer static eliminator 81, a transfer separation section 82, and a conveyance section 83, as shown in FIG. 7(a). In the pre-transfer static eliminator 81, a charge wire 81a is charged with, for example, 4.8K shifted to the negative side.
An alternating current bias voltage of approximately V is applied to generate corona discharge, selectively removing positive charges on the surface of the photoreceptor drum 1 and causing the toner to retain a constant negative polarity charge.

As a result, the Coulomb force between the toner and the photoreceptor drum 1 is reduced, and a high transfer efficiency can be obtained with a small transfer current, and the positive charge held by the transfer paper is reduced, making it easier to remove static electricity from the paper using a separate charger, which will be described later. Image generation is suppressed.

In the transfer separation unit 82, a transfer charger 82a and a separation charger 82b equipped with two charge wires are arranged in parallel near the surface of the photosensitive drum 1, and a registration roller 82
The transfer paper fed at an appropriate timing by the cooperation of the registration roller 82d and the guide Mylar 82e is guided so that it comes into close contact with the surface of the photoreceptor drum 1, and the transfer charge t & 2a is applied to the transfer paper from the back side of the paper. By performing corona discharge of charge, negatively charged toner is transferred onto the transfer paper. In the adjacent separate charger 82b, an alternating current bias voltage is applied to the two wires to cause a corona discharge and remove the positive charge held by the transfer paper. As a result, drum 1
The adhesive force between the transfer paper and the transfer paper is weakened, and the transfer paper can be easily separated by its own rigidity. In this case, in order to prevent the generation of a plate image, it is necessary to gradually remove the charge from the transfer paper by the separation charger 82.11 so that the charge is removed for a longer time. This is achieved by setting a wide angle α between the charger 82b and the separate charger 82b, and employing a double wire system, and also by providing the pre-transfer static eliminator 81 as described above to reduce the amount of charge held on the transfer paper. Note that a negative bias voltage may be applied to the separate charger 82b instead of the AC high voltage. A separation claw 82t' is provided on the downstream side of the separation charge v82b in the rotational direction of the photosensitive drum 1 to improve separation of the transfer paper. This separation claw B2f is arm 82! ], and the solenoid 82h is connected to the solenoid 82h via the solenoid 82h.
11 is turned on and off to bring the tip into contact with and away from the surface of the photoreceptor.

In this case, the separating claw 82f is brought into contact with the drum 1 while being swung in the width direction so as not to damage the surface of the photosensitive drum 1 at the same location. That is, as shown in FIG. 7(b), when the eccentric cam 82 "1" on the back side of the machine is rotated,
The rotation is from the swing lever 82f2 to the one-way bearing 8.
2" to the swing cam 82r4 through the transmission shaft 8.
The separation claw 82f is swung in the direction of the shaft 82f6 via the shaft 2f5. A conveyance guide 82i that guides the separated transfer paper to the conveyance section 83 is disposed above the separation charger 82b.

In the conveying section 83, a conveying belt 83a is connected to a conveying guide 82i.
It is stretched along the downstream side. A separation sensor 831) is disposed in the transport path of the transport belt 19-a to detect separation errors. Further, a fan 83c is disposed below the conveyor belt 83a to attract the transfer paper to the surface of the belt 838 to improve conveyance.

Returning to FIG. 1, a cleaning section 9 is provided near the circumferential surface of the photosensitive drum 1 and on the downstream side of the separating claw 8'2f of the transfer section 8. As roughly shown in FIG. 8(a), the cleaning section 9 includes a pre-cleaning charge device (denoted as FCC) 91. A fur brush 92 and a cleaning blade 93 are arranged in this order along the circumferential surface of the photosensitive drum 1. In the PCC 91, positive polarity corona discharge is performed to remove toner (
(negatively charged) is uniformly positively charged, thereby repelling the positively charged photoreceptor drum 1 and cleaning blade 93 and making it easier to detach. The fur brush 92 is driven to rotate in the same direction as the drum 1, and removes foreign matter such as paper dust that is difficult to eliminate with the next blade 93. As shown in FIG.
The brush bristles 92C made of acrylic carbon are erected on the circumferential surface of the toner 8 through a cloth 92b as an insulating material, and the positive charge imparted to the toner by the PCC is grounded through the fur brush 92. The blade 93 is supported at one point in the center so that it can be pressed with uniform pressure over almost the entire circumferential surface of the photoreceptor drum 1 in the width direction, and also prevents local damage to both sides. In order to prevent this, the drum 1 is configured to be swung in the width direction of the drum 1 and come into contact with the surface of the drum 1.

The blade pressure mechanism is constructed as shown in FIG. 8(C). Therefore, if the cleaning solenoid 93a is turned on at the same time as the main switch is turned on, the eighth (d)
As shown in the figure, the lever 93b is rotated in the direction of the arrow against the elastic force of the pressure spring 93f, and the pressure arm 93C is also rotated in the direction of the arrow, so that the blade 93 is brought into pressure contact with the surface of the drum 1. It will be done. The pressurizing force is determined by the position of the pressurizing adjustment stopper 93d screwed to the pressurizing arm 93C as shown in 8(f), but the stopper 93'd is positioned by a jig, and the blade There is no need to adjust the pressure when replacing. Also, the amount of release is determined by hitting the stopper plunger r9 shown in FIG. 8(e).
It is determined by regulating the extension stroke of 3 e.

A blade cleaner 94 is attached to remove dirt that adheres to the tip edge portion of the blade 93 by an inch. The toner removed by the fur brushes 92 and 93 is discharged to the outside of the cleaning section 9 by a toner collection coil 95 that is rotatably provided below these, and then passes through a collection vibrator to the developing tank h (6th (a)). (see figure). The toner collection mechanism in this case is constructed as shown in FIGS. 8(g) and 8(h). According to this, the toner scraped off by the blade or fur brush is discharged from the cleaning unit by the toner collection coil 95, and collected into the developing tank h by the collection spring 95d in the intermediate vibrator 9'5a and the discharge vibration 95C. , reused. The drive from the drum link gear 95e is transmitted via the bevel gear 95f and footer link chain 95g, and the recovery spring 95d rotates. Further, the discharge vibrator 95c is provided with a hole 95h through which the developer flows, and by stirring the developer flowing therein and the 1-ner which is collected and conveyed, the discharge vibrator 95
This prevents toner clogging in step 1. Note that a vinyl tube is used as the intermediate pipe 95a to prevent twisting caused by opening and closing the cover opening.

An electric lamp 10 is disposed downstream of the cleaning section 9 and upstream of the drum thermistor 2. The static elimination lamp 10 of this example uses a cold cathode fluorescent lamp (CFL) 101 with high brightness and low temperature rise. CFLlol
The light is diffused by the snow removal filter 102 and irradiates substantially the entire width direction of the photosensitive drum 1, thereby making it possible to substantially completely eliminate the residual charge. CFLlol of the static elimination lamp 10 is turned on at the same time as the print key of the copying machine is turned on and the main motor rotates.

Thus, the transfer paper conveyance process of appropriately feeding, conveying and discharging the transfer paper in order to transfer the toner image formed in the above-described image forming process is performed via the above-described transfer section 8. There is. As shown in FIG.
, a fixing section 12 that fixes the transferred toner image, a reversing/discharging section 13 that appropriately inverts the transfer paper after image fixation and sends it for ejection or double-sided copying, and a single-sided copying for double-sided copying. It consists of a double-sided tray section 14 for stacking finished transfer sheets.

The paper feed section 11 includes a first tray 111. It has a second tray 112, and the tables 111a and 112a of each tray are provided so as to be able to rise and fall freely, and various detection means such as an upper limit sensor, a lower limit sensor, a paper feed sensor, and a paper end sensor are installed in an appropriate device. A drive motor (not shown) is driven and controlled by a microcomputer (not shown) provided as a drive control means in response to signals from a CPU (not shown), and its lifting and lowering operations are appropriately performed via a drive wire 113. On the exit side of each tray, a calling roller 114 and a paper feeding roller unit 115 are arranged respectively.The paper feeding roller unit 115 rotates a friction separation roller 115a and a normal paper feeding roller 115b. When the sheets are brought into contact with each other and only one sheet is sent out from the tray by the calling roller 114, the conveying force of the sheet feeding roller 115b is greater, but when there are two or more sheets, the deterrent force of the separating roller 115a is Upper and lower pinch roller sets 116 are disposed downstream of each paper feed roller unit 115 to merge the conveyance path from each tray into the paper feed conveyance path 117. This paper feed conveyance path 117 is connected to the registration roller 82d of the transfer section 8 described above.The number of sheets accommodated in each tray is i, ooo sheets for the first tray 111 and 500 sheets for the second tray 112. , eight different sizes of paper are separated by automatically moving a side guide (not shown).In this case, the paper size can be switched by pressing the stopper of the side guide 111b as shown in FIG. This is done by grasping the lever 1110 and sliding it back and forth.A shielding plate 111e is screwed to the guide lever bracket 111 (1), and the tray bottom plate 111
Eight different sizes are displayed by changing the ON/OFF state of the four sensors of the size detection board 111" provided on the a. The stopper lever 1110 engages the shaft side guide 111g by the elastic force of the spring. The shaft side guide 111g is treated with tufftride to increase its hardness and coefficient of friction and prevent the guide lever from slipping.

In the fixing section 12 provided downstream of the transfer section 8, a fixing roller 121 having a heater 122 inside and a pressure roller 123 are disposed in a rotatable manner as shown in FIG. The circumferential surface portion 121a of the fixing roller 121 in this example is made of Teflon, and the temperature of this surface is also controlled by the thermistor 12.
4, and the CPIJ controls the on/off of the heater 122 accordingly, and normally the surface temperature is controlled to be within the range of 185±3°C. The pressure roller 123 is pressed against the fixing roller 121 at a predetermined pressure by the urging force of a pressure solenoid (not shown) transmitted via a pressure arm 123a and a pressure cam 123b, and the toner image is transferred. The toner image is fused by the heat and pressure applied when the paper is conveyed while being pinched between them. In this case, an automatic pressure mechanism is used to prevent deformation of the pressure roller 123, facilitate removal of jammed paper, and prevent heat transfer to the fixing roller. The pressure roller 123 is not rotated and the pressure is released. This fixing pressure mechanism is the 11th (a)
') to FIG. 11(c). A half-turn spring clutch is used as the fixing pressure clutch. In FIG. 11(a), each time the pressurizing solenoid 123C is turned on and off, the plunger actuator 123d is connected to the hooks A and B of the sleeve 123e.
is caught, the pressure cam shaft 123f rotates half a rotation, and the pressure cam 123C attached to the shaft also rotates half a rotation and stops. When the fixing pressure clutch rotates half a turn and stops, the pressure cam 123C also rotates a half turn and stops, as shown in 27- in FIG. 11(b). The lower pressure lever 123a lifted by the pressure cam 123c also lifts the upper pressure lever 123h via the pressure spring 123g, and pressurizes the pressure roller 123. At the time of cancellation, the 11th (
c) As shown in the figure, when the pressure clutch rotates half a turn, the pressure cam 123C also rotates half a turn, and the valley of the cam lowers the
The upper pressure levers 123a and 123h are lowered and the pressure is released.

Also, when the A part of the stopper (pressure lever) 123i hits the stopper bin 123J, the upper pressure lever 123h
The stop position of the roller 123 is determined, and the release amount of the Calo pressure roller 123 is determined. A rubber damper 123k is attached to the outer periphery of the stopper bin 123j to absorb shock and sound when pressure is released.

The fixing pressure is adjusted using the adjustment screw 1 attached to the upper pressure lever.
It can be adjusted by rotating 232 and changing the length of the pressure spring 123q. That is, as the pressure spring becomes shorter, the elastic force increases and the pressure force increases.

A cleaning blade 129 equipped with a silicone oil application mechanism is disposed downstream of the thermistor 124. The application of silicone oil in this example is
As shown in FIG. 11(d), the fixing roller 121 is directly coated with felt 129a. In addition, a rubber metering blade 129b is used to uniformly apply oil on the surface of the roller 121 and scrape off excess oil.
The oil is collected into an oil sump 129C via oil receivers at both ends of the blade 129b. Metering blade 12
The biting pressure of the roller 9b onto the roller 121 is determined by a spring and does not require adjustment. Silicone oil is pumped only while the main motor is rotating. As shown in FIG. 11(e), the pumped oil falls into the oil sump 129C through the nipple 129d and flows to the back of the oil sump 1129C. During that time, the oil is sucked up by the oil-coated felt 129a, and the remainder returns to the front side of the machine and is transferred to the oil tank 12 from the funnel 129e.
It will be collected at 9f. The shutter 129g opens the funnel 129e when the inner cover 129h is attached, and the oil is collected into the tank, but the inner cover 129g
When h is removed, the spring will release the
29e to facilitate maintenance of the fixing section. Further, the oil pump is constructed as shown in FIG. 11(f). When the main motor rotates, the indeterminate transport roller 128 (see Figure 1) rotates, and the coaxial boss 129 rotates, thereby link 1.
29j can swing left and right. There is an overrunning clutch 129k at the fulcrum of the link 129j, and the link 129
The cam 129I2 rotates in the direction of the arrow due to the left and right reciprocating motion of J. Therefore, the actuator 129m reciprocates in the direction of the arrow and pushes the rubber hose 129n, so that oil is pumped up. In addition, in order to prevent the cam 1292 and the shaft from rotating together, the cam 12 is
It is designed so that the temperature of 9 degrees Celsius does not reverse.

Peeling claws 125 and 126 are provided on both rollers 121 and 123, respectively, to prevent paper from wrapping. The peeling claw 126 provided on the pressure roller 123 is equipped with a release groove, and by opening the reversing part, the claw 126 escapes from the pressure roller 123, making it easier to remove jammed paper and also when replacing the roller, etc. This prevents damage to the rollers and claws. In Figure 11<(+>), when the reversing section is open, the claw 126 is released as shown by the solid line due to its own weight, but when the reversing section is set, the spring is released by the A section of the reversing units 1 to 13. Link 126i via 126a
] is lowered and the lever 126C is rotated clockwise, thereby moving the pawl 126 to the position indicated by the dotted line. The paper fed from the conveyor belt of the transfer section 8 is guided to the transfer section P by the entrance guide plate 127, and the paper that has been fixed is sent to the next reversing paper discharge section 13 by a pair of fixed @convey rollers 128. .

As shown in FIG. 10, the reversing/discharging unit 13 can change the guide direction and appropriately directs the incoming transfer paper to the reversing path R.
An auxiliary guide plate 131 that guides the rollers 131, a main reversing roller 132 that supplies the main conveying force, front and rear reversing rollers 133a and 133b, which are provided so as to be able to move toward each other and open and close the reversing path R as appropriate, form the reversing path R-3. A reversing guide plate 134, a reversing return roller 135 for returning the paper introduced into the reversing path, and a rattling roller 136 that is provided so as to be able to come into contact with and separate from the return roller 135 and clamp the paper to be returned.
, a branching claw 137 that is provided so that the guide direction can be changed and selects the paper sending direction, a paper ejecting roller 138 that ejects the paper to a sorter, which will be described later in this example, and an ejecting roller 139 that ejects the paper to the double-sided tray section 14, etc. ing. Among these,
Before.

The rear reversing rollers 133a and 133b are connected to a reversing solenoid, the auxiliary guide plate 131 and the reversing roller 136 are connected to a return solenoid, and the branching claw 137 is connected to a branch solenoid. The fixing unit 12
The transfer paper fed from the transfer paper is suitably reversed and discharged as it is or discharged to the double-sided tray section 14.

The interlocking mechanism between the auxiliary guide plate 131 and the tapping roller 136 is constructed as shown in FIG. 12(a). By turning on the return solenoid 136a of the auxiliary guide plate 131 and the rattling roller 136, the rattling roller 136 moves in the direction of the arrow and pressurizes the paper inside the reversing guide plate 134, and the pressurized paper moves to the reversing return roller 135. is returned in the opposite direction by the drive of. or,
When the return solenoid 136a is off, the auxiliary guide plate 131 is in the position indicated by the solid line due to the force of the spring 131a, and guides the paper to the reversing guide plate 134, but when the solenoid 136a is turned on, the auxiliary guide plate 131 is moved to the position indicated by the dotted line by the lever 136b. lowers, and the paper is ejected normally. Further, when the paper is inside the reversing guide plate 134, it does not interfere with the i-feeding of the paper coming down. Also, before.

The opening/closing mechanism of the rear reversing rollers 133a and 133b is the 12th (b)
) It is constructed as shown in the figure. Reversing solenoid 132
When the main reversing roller 132 is driven, the boss 132b is in the position shown by the solid line and the front and back reversing rollers 133a and 133b are closed as shown by the solid line. Ru. When the reversing solenoid 132a is turned on, the reversing clutch (half-rotation SP clutch) rotates the boss 13.
2b is rotated to the position indicated by the dotted line, and the roller 133a is reversed back and forth by the front arm 132C and the rear arm 132d.

133b move to the positions indicated by dotted lines in the figure, and the paper is conveyed to the reversing guide plate. The branch solenoid drive mechanism is constructed as shown in FIG. 12(c). When the branch solenoid 137a is off, the branch pawl 137 is at the position indicated by the solid line, and the paper is normally discharged along the section A of the pawl 137. When the solenoid 137a is turned on, the branch claw 137
moves to the position indicated by the dotted line, and the paper is guided to the lower paper discharge guide plate 139a along the B part of the claw 137, and is stored in the double-sided tray 14 (see FIG. 1).

When the transfer paper conveyed after fixing is to be reversed in the reversing/discharging unit 13 configured as described above, the reversing solenoid is first turned on with support from the CPU, and the front and rear reversing rollers 133a, 133blfillRI, the reversing path R is opened, the return solenoid is turned off, and the tapping roller 136 moves back to the return roller 13 as shown by the broken line.
5, and the auxiliary guide plate 131 is tilted upward to the right to a position where it is guided to the reversal path R. When the transfer paper is fed into the reversing section set in this way, @ reversing roller 133
The auxiliary force insolenoid is turned on while being held between the roller a and the main length motor roller 132, and the tataki roller 1:'16 is returned with 8 pieces of paper and is pressed against the roller 135, and the auxiliary guide plate 1
31 is returned to the position shown by the solid line, and the paper accommodated in the reversing path R is moved backward! @1711I are held between the rear reversing roller 133b and the main reversing roller 132, and as they rotate, the downstream m
Depending on the position of the branching amount 137, on the downstream side of this paper, the paper is ejected toward the sorter (c)
4, it is determined whether the release δ will be released or not. That is, when the branch solenoid 137a is turned on by the support of the CPU and positioned as shown by the broken line, the paper is ejected to the double-sided tray section; conversely, when it is turned off and positioned as shown by the solid line, the paper is ejected. .

In FIG. 1, a double-sided tray section 14 is disposed above the first paper feed tray 111 described above. As shown in FIG. 13(a'), the double-sided tray section 14 includes a receiving roller 141 that guides the transfer paper fed from the above-mentioned ejection roller 139 into the inside, and a receiving sensor that checks for jams in the received paper. A sensor 141a, a branching plate 142 whose guiding direction can be changed and whose introduction position can be changed depending on the paper size, and a bottom plate 143 which is movable up and down.
, an inclined roller 144 that can be raised and lowered and is inclined with respect to a reference plate (not shown) on the side of the paper to be stocked, and aligns the front, back and sides of the paper to be stocked; and a bottom plate 142
Vapor presence detection filler 145 that detects the presence or absence of paper on top
, a lifting arm 146 that raises and lowers the bottom plate 143, a pickup roller 147 that sends out the stocked paper, and a paper separation roller set 148 that transports the stocked paper to the paper feed conveyance path 117 (see FIG. 1). Among these, the branch plate 142
double-sided branch solenoid 142a, lifting arm 146
are respectively connected to the tray set solenoid 146a, and each of these solenoids is appropriately driven and controlled by the aforementioned CPU according to a predetermined program, so that transfer paper of various sizes can be duplexed and stenciled appropriately. That is, first, the tray set solenoid 146a
is turned on and the bottom plate 143 is lowered to prepare for receiving the transfer paper. Next, the transfer paper that has undergone single-sided copying is fed from the discharge roller 139, passes through the receiving roller 141, and the introduction position is selected by the branch plate 142.

In this example, if the paper is A4 size or smaller, the branch solenoid 142a is turned on, the branch plate 142 is positioned as shown by the broken line, and the received paper is introduced directly below the inclined roller 144 via the sponge roller 142b.

If the received paper is larger than A4 size, the branch solenoid 142a is not turned on and the received paper is introduced into the receiving section side of the bottom plate 143 along the branch plate 142 at the position shown by the solid line and then conveyed to the lower part of the inclined roller 144. Bottom plate 14
The paper introduced onto the top plate 143 is lowered together with the bottom plate 143 and is aligned by the rotating inclined roller 144 to prepare for double-sided copying. Then, the tray set solenoid 146a is turned off to support the start of double-sided copying, the bottom plate 143 is raised, the top paper is brought into contact with the pick-up roller 147, and the top paper is sent one by one to the paper feed return path 117 via the separation paper feed roller set 148. Sent out.

The lateral movement a mechanism for the tray bottom plate 143 is constructed as shown in FIGS. 13(b) to 13(d).

When the tray set solenoid 146a is turned on, the shaft 146b of the lifting arm 146 rotates counterclockwise, so the first plate 146C moves to the left, the second plate 143a also moves to the left, and the arm rotates to move the third plate 143C. By pulling, the tray shaft 143d also moves toward you, and the tray bottom plate 143 moves approximately 2
Move horizontally by mll1.

This is to prevent the conveyed paper from hitting the reference wall and causing buckling or jamming, and to provide a margin for alignment at the inclined roller portions 144. Further, the stock correction mechanism is constructed as shown in FIG. 13(e). Since there is a risk that the paper stocked in the double-sided tray 14 may have uneven directions, the paper stocked in the double-sided tray 14 may be placed in the horizontal direction (horizontal registration) by the steel industry inner plate 149.
We are making corrections. The measurement guide plate 149 is driven by a side guide motor 149a (stepping motor). There is a shielding plate 149b next to the side guide plate, which is normally located at the home position as detected by the home sensor 149C.

When you press the print button in double-sided tray acceptance mode,
- First, it advances to the waiting position (depending on each size), and when the stocking is completed, it advances to the paper section and presses it against the tray reference side wall. While paper is being fed from the double-sided tray, the wound guide plate 149 remains pressed against the paper and supports the conveyance of the paper. When the paper in the duplex tray runs out, the wound guide plate 149 returns to one position on the home so that it does not interfere with the next copy.

A manual pressure release mechanism is provided so that the paper stocked in the double-sided tray 14 can be easily taken out and rearranged, and its configuration is as shown in FIG. 13(f). When the pressure release lever 143e is pushed to the right, the release cam rotates clockwise and pushes the fourth plate 143r to the left. As a result, the first plate 146C is pushed to the left and the tray bottom plate 1
43 is lowered, and the pressure between the calling roller and the bottom plate 143 is released. Also, 13th. (G> As shown in Figure 13 (11), the double-sided separation roller 39-0148 is also reversed like the 1st-2 paper feed tray, but this is not to return the paper to the table surface, but rather the separation roller 148 The actuator 148a is reversed to avoid partial deterioration due to use of the same side of the actuator 148a.
The roller drive plate 148b is integrated with the separation roller shaft 148C, and when the tray bottom plate 143 is lowered, the separation roller actuator 148a is pushed down and moved clockwise. Then, the one-way shaft 148d also moves in the same direction. As a result, the one-way housing 148e # moves and the separation roller 148 is reversed.

The transfer paper conveyance process of this example configured as described above has the following four types of functional modes.

(1) Automatic double-sided copy function mode In this case, as shown by the broken line in FIG. After being transferred, fixing section 1
The images are fixed in Step 2, then reversed in the reversing section 13, and then discharged to the double-sided tray section 14 where they are stacked with the image side facing up. Then, it is sent to the transfer section 8 again by double-sided copy support, and after the image is transferred to the back side, it is fixed, and then transferred to the reversing section 13.
The paper is then ejected. At this time, if the reversing unit 13 performs the reversing operation again, the paper is ejected with the first copied surface facing up.

(2) Composite copy function mode This allows images to be transferred multiple times onto the same side of transfer paper, allowing images of different originals to be combined onto the same paper. In this case, the transfer paper that has been copied on one side may not be transferred to the double-sided tray section without being reversed.
Released at 4. Therefore, they are stacked with the image-transferred surface facing down, allowing composite copies to be made.

(3) Reverse paper ejection function mode Used when copy page alignment is required.

In this case, the transfer paper after the transfer and fixing is reversed before being discharged. Therefore, the ejected copies are stacked on top of each other in the order in which the originals were sent, with the image-transferred surface facing downward, and the pages are aligned.

(4) Normal paper discharge function mode In this case, the transfer paper after image transfer and fixation is not turned over and is not sent to the double-sided tray section, but is discharged straight. Therefore, the copy is ejected with the image-transferred surface facing up.

These four types of transfer paper transport function modes are set before printing starts via the CPU as operation control means in accordance with the operator's support. The program pre-installed in the CPU as the setting procedure is shown in a flowchart as shown in FIG. 14(b). Here, the blank paper mode means that there is transfer paper in the duplex tray when the main switch is turned on, that there is transfer paper in the duplex tray when duplex copying is completed, or that there is no transfer paper in the duplex tray when double-sided copying is being performed. Indicates when the mode is canceled, etc.

In addition, Y is FYESJ and N is rNOJ 1. RET means return.

Next, it is attached to the above-mentioned copying machine main body (A). Explanation about automatic document feeding bag [(A, D, F) (port 1)
Ru. As shown in FIG. 1, the ADF of this example is broadly divided into a paper feed separation section 15 and a conveyance section 16.

As shown in FIG. 15(a), the paper feed separation section 15 presses the document against a document hit table 151, a call belt 152 that sends out the lowest sheet of the set document toward the transport section 16, and a call belt 152. Entrance guide mylar 153 and pressurized mylar 154, which pressurizes the guide mylar 153 in accordance with the operation of the calling belt 152 via a cam 1538, etc., are rotated intermittently by one rotation, and the manuscript is transferred by the action of an internal one-sided clutch. A separation roller 155 separates and conveys the sheets one by one, and a pressure spring 156 is attached to the circumferential surface of the separation roller 155.
It is comprised of a separating blade 156 that is brought into pressure contact with the document a to prevent double feeding of documents, a pull-out roller set 157 that pulls out the documents to the conveying section 16, and the like. Along this document feeding path, a document set sensor 158 and a document size sensor 159 are arranged between the calling belt 152 and the separation roller 155 and downstream of the pull-out roller set 157, respectively. A detection signal is output to the CPU, and a series of paper feeding operations is controlled so that the originals are fed one by one at appropriate timing.

43 - The drive mechanism of the paper feed separation section 15 is shown in FIG. 15(b).

It is configured as shown in Fig. 115(c). Separation motor 15
2a turns on, the intermediate pulley 152C rotates via the first timing belt 152b.

One drive of the intermediate pulley 152C is transmitted to the first pulley 152e via the second timing belt 152d, and the pullout roller 152f rotates.

The intermediate pulley 152C is driven by the first gear 1520° and the second gear.
It is transmitted to the paper feed clutch (brake clutch) 152m via the gear 152h, and when the paper feed clutch 152n+ is turned on, the separation roller 155 rotates, and the calling belt 152 also rotates via the third timing belt 1521. Also, the paper feed clutch 152m is turned on, and the disk plate 152j
When the document rotates once, the paper feed clutch 152h is turned off by the one-rotation control sensor (photointerrupter) 152k, and at the same time, the brake clutch 1521 is turned on to immediately stop the rotation of the separating roller 155 and the calling belt 152, so that the document can be continuously fed. Prevents sending.

The entrance guide mylar pressurizing mechanism is constructed as shown in FIG. 15(d). The entrance guide mylar 153 is for pressing the document against the calling belt 152 to improve the conveyance of the document. When setting the original, the pressure is released, making it easier to set the original. When setting an original, the convex part of the cam 153a is inserted into the cam follower 153b (!l-), and the pressure mylar 154 is not pushing the entrance guide mylar 153, but when the cam rotates once (one original is fed), the return spring The force causes the cam follower 153b and the shaft 153C to rotate counterclockwise, causing the pressurized mylar 154 to move toward the entrance guide mylar 15.
Pressure 3. The mylar pressing force is regulated by the cam follower 153b stopping against the cam follower stopper 153d, as shown in FIG. 15(e).

The document separating mechanism of this machine is of a friction separation type using a blade 156 and a roller 155, as shown in FIG. 15(f). The set original is regulated by a separation blade 156,
Only the bottom document is separated by the separation row 5155 and the calling belt 15.
It is sent out to the pull-out roller 157 by the driving force of No. 2. The drive of the separation roller 155 is cut off after one rotation, but the one-way clutch allows it to rotate in the transport direction without resistance, and the document is transferred to the transport section 1 by the pull-out roller 157.
Sent to 6. If the IIi frictional force between the originals is f, and the frictional force between the original and the separation roller is F, then when F>f, only one original is fed.

The pull-out roller pressure release mechanism is constructed as shown in FIG. 15(o). When a paper jam occurs in the separating section, the pressure on the pull-out roller 157 is released by opening the separating section cover, making it easy to take out the jammed paper. Separation part cover 15
When the 7h is set, the hinge part 157a pushes the pin 157C of the release cam 157b, and the protrusion of the cam escapes from the driven pull-out roller bearing 157d, so the spring 157
e, the driven pullout roller 157f is pressed against the driving pullout roller. On the other hand, when canceling, the first
As shown in Fig. 5(h), when the separation section cover 157h is opened, the release cam 157b is rotated clockwise by the release spring 157i, and the protrusion of the cam pushes down the bearing 157d, so that the pressure on the driven pullout roller 157t is released. It will be canceled.

In the conveyance N516, as shown in FIG.
The paper feed sensor 162 is provided on the upstream side of the paper feed sensor 162. Further, the paper discharge section 17 on the downstream side of the conveyance section 16 has a paper discharge sensor 17 along the paper discharge path.
1. A paper ejecting roller 172, a static elimination brush 173, and a document stacker 174 are arranged in this order. Similarly, the CPU appropriately controls the document ejecting operation, and the exposed documents are sequentially ejected onto the stacker 174 one by one. be done.

The drive mechanism of the transport section 16 is constructed as shown in FIG. 15(i). When the conveyance motor 161b is turned on, the eleventh relay 161d rotates via the motor belt 161C. Then, the rotation of the motor 161b is rotated by 90 degrees by the bevel gear 161e and the intermediate conveyance gear 161f and transmitted to the belt drive gear 161g47-, and the conveyance belt 161 is rotated by the rotation of the 27th gear 161h. Further, the rotation of the conveyor belt 161 is transmitted to the 31st ray 1611 and the 41st ray 161j, and is transmitted to the paper ejection roller 172 via the paper ejection drive belt 161k.
rotates.

The lift balance mechanism of the transport section 16 is constructed as shown in FIGS. 15(j) and 15(k).

The brake disc 163a is fixed to the arm bracket 163 by a stopper 163b, and the friction plate 163C is fixed to the transport section arm 163e by a holder 163d. The brake disc 163a is pressed against the friction plate 1 by a constant pressure by a brake spring 163f.
63C, and the transport section 16 stops at any position.

The torsion plate spring 1630 twists when lowering the conveying section 16, reducing the opening/closing force of the conveying section 16 (when the conveying section is raised 90 degrees, the spring is O).
. In addition, in pressure plate mode, the 15th
(k.) As shown in the figure, the base of the conveying section 16 is lifted up (the lift amount is about 30111 m), like a normal pressure plate.

Next, we will explain the automatic copy sorting device (sorter) (c) attached to the paper output side of the copying machine main body (a). As shown in FIG. 1, the sorter (c) of this example is broadly divided into a drive control section 17, a conveyance section 18, and a sorting section 19. Of these, the conveyance section 18 is the 16th (a)
As shown in the figure, the paper ejection roller 13 of the copying machine main body (A)
Upper and lower receiving guide plates 181 are provided on the downstream side of 8 and receive ejected copies into the sorter (c), and the transport path T is rotatably stretched between an appropriate number of rollers and moves in parallel.
s (solid line section) upper and lower conveyor belts 182a and 182b (indicated by one-dot chain lines) that sandwich and convey copies between them, and an entrance provided toward the guide path of the acceptance guide plate 181 to detect acceptance of copies. It consists of a sensor 183 and a registration sensor 184 provided in the transport path Ts to check the transport timing, and is driven to reliably transport accepted copies to the sorting section 19 at an appropriate timing based on the detection signals of each sensor. A paper ejection sensor 138a is provided upstream of the paper ejection roller 138, and is used to control the timing of copy reception.

The sorting section 19 is divided into an upper and a lower foot block and is arranged vertically in parallel with a bruft tray 191 that collectively receives ejected copies when sorting is not required (in the clear mode). ) are equipped with 20 storage bins 192 (see Figure 1) for receiving copies that are sorted and discharged as appropriate, and a bruft tray is provided at the connection portion with the above-mentioned conveyance section 18 to direct the direction in which the conveyed copies are sent out. A switching claw 19 that switches between the 191 side and the storage container 192 side.
3 is provided, and this switching pawl is equipped with a switching renoid j.
93. a are connected. Further, on the entrance side of each storage bin 192, a deflection claw 194 is provided to appropriately guide copies conveyed through the sorting path To into each pin 192, and a deflection solenoid 194a is connected to each deflection claw 194, respectively. There is. A discharge sensor 1 is provided on the downstream side of the switching claw 193.
95, an entry sensor 196 and a bin sensor 197 are provided at the entrance of each storage bin 192, respectively.

Therefore, in the clear mode, the switching solenoid 193a
remains off, the switching claw 193 is positioned as shown by the solid line, and guides copies sent from the upper and lower conveyor belts 182 to the draft tray 191 side. On the other hand, in the saw 1 stack mode, the switching solenoid 19'3a is turned on, the switching claw 193 is positioned as shown by the broken line, and the copy is guided to the storage bin side. For example, in this example <cp
The operation timing of each deflection claw 194 is controlled according to the detection signals of the discharge, entry, and bin sensors 195, 196, and 197 by the drive control unit 17 equipped with a
At 92, the copies are sorted according to the desired specifications and are ejected.

The mode switching mechanism is constructed as shown in FIG. 16(b). The inspection vehicle 193 functions to send the paper conveyed by the conveyor belt to the bruft tray 191 or to the distribution section. Switching solenoid 193
When a is turned on, the switching claw 193 moves in the direction of the arrow through the link 193b, and the paper moves 51-1! Sent to iW. That is, in the clear mode, the switching solenoid 193a is turned off, and in the sort, stack, or manual feed mode, the switching solenoid 193a is turned off.
a turns on. Note that 193C is a stopper and 193d is a return spring.

The guide plate release mechanism is constructed as shown in Fig. 16 (C1).In order to facilitate removal of jammed paper at the switching section,
The guide plate 193e can be released. One guide roller 3r of the lower switching guide plate 19.38+ is in contact with the driven unit 198 of the upper distribution section, and by opening the driven unit 198, the guide plate 193e+ moves to the device indicated by the broken line. When the driven unit 198 is set, the force of the spring 1930 causes the guide plate 193e to return to the position indicated by the solid line.

The deflection claw operating mechanism is constructed as shown in Figure 16 (d). Normally, the bin solenoid 194a is off, so the deflection claw 194 is in the position shown by the solid line, so that it does not interfere with paper conveyance. When the bin solenoid 194a is turned on, the deflection lever 194b is rotated in the direction of the arrow by the plunger, and the deflection claw 194 is thereby also moved to the position indicated by the dashed line. The paper is guided by the deflection pawl 194 and stored in the bin.The 20th bin does not have a pin solenoid, and the deflection pawl 194 is kept open by a spring.

Note that a manual feed section 199 is provided above the brush tray 191 on the downstream side of the switching claw 193.

This manual feed section 199 includes a stopper 199f connected to a manual feed solenoid 199d at the tip of the manual feed table 199a.
A manual sensor 199C for detecting the feeding of a manual copy is provided, and by feeding an arbitrary copy from there during automatic sorting, it can be discharged into a desired bin 192.

The manual shifting mechanism is constructed as shown in FIG. 16(e). Press the sort/stack key to manually feed table 199
When paper is set in a, the actuator 199b is lowered and the manual sensor 199c is turned on. Manual sensor 19
At the same time as 9c turns on, the drive motor, clutch, pin solenoid, and switching solenoid turn on. Next, about 1 second after the manual sensor 199c is turned on, the manual solenoid 199
d is turned on, the manual feed stopper 199f is lowered via the manual feed solenoid link 199e, and the paper is fed and stored in a predetermined bin. Furthermore, when the manual sensor 199c is turned off, the manual solenoid 199d is turned off, but the motor, clutch, switching solenoid, and pin solenoid remain on until the entry sensor is turned off.

As shown in FIG. 1, the drive control unit 17 includes a control board 171 made of CPtJ, a power supply unit 172, a drive motor 173 that drives the above-mentioned upper and lower conveyance belts 182, and conveyance rollers with a sorting diameter M T o, and an electromagnetic It is composed of a clutch 174 and the like.

The drive mechanism is constructed as shown in FIG. 16(r). The drive of the drive motor 173 is transmitted from the first timing belt 173a to the drive pulley 173b to the second timing belt l'1'73c to the pulley gear 173d, and the upper and lower conveyor belts 173°C.

173r and the drive paper ejection roller 173g rotate. Further, the rotation of the drive pulley 173b is controlled by the third timing belt 1.
73h to the electromagnetic clutch 174, and when the clutch 174 is turned on, the fourth timing belt 1
Via 731, above.

The pulleys 173j and 173k of the lower hook distribution unit rotate, and their drive is transmitted to the distribution pulleys 173m (20 pieces) by the fifth timing belt 1734, and the conveyance roller of the distribution unit rotates. Further, there is a pulse encoder on the shaft of the drive pulley 173b, and the operation of the sorter is controlled by the pulses generated by the encoder.

Various operation control mechanisms in this actual flow example configured as described above will be explained below.

The basic operating modes carried out in this electrophotographic copying machine equipped with an ADF and a sorter as peripheral devices are classified as follows.

(1> Copy mode ■) Normal copy (including back-side ejection) 55- ■) Double-sided copy E composite copy IV) Blank copy <2) Abnormal mode There are four types: time and serviceman call time.

(3) Peripheral mode ■) Sorter 41 normal mode Ejects copies all at once to the nib loft tray.

B. Sort mode: Ejects one repeat copy into each storage bin.

C. Stack mode: Eject all repeat copies to one pin.

2. Blank paper mode: Transfer paper that has not been copied is ejected to the proof tray, and no data is exchanged with the copying machine, such as counting the number of copies.

II) ADF A. ADF mode RO, 5ADF mode (manually inserts the original) C. Jam correction mode II. Unified mode (uniforms the copy size of originals of different sizes) In this example, the microcomputer C is used as the operation control means, and all operations are centrally controlled based on a preset program under the control of this microcomputer. The main routine in the program is shown in a flowchart as shown in FIG. 17(a). In Figure 17 (a), the program from the start to the end of the reading and writing of each data (initialization) process is executed only when the power is turned on, and the process of ``initializing the paper feed tray'' From then on, it is constantly executed during machine operation.One cycle time of this main routine is about 20 m5ec.

In addition to the main routine described above, interrupt processing is performed at regular intervals as shown in FIG. 17(b). 17th
(b) In the figure, "Interrupt IJ generates an interrupt every 10m5ec at a predetermined terminal of the CPU by timer IC1, and directly executes control of various timers and copy operations."■" is 1 to other specified terminals of the same CPU.
Processing that requires strict timing is performed by generating interrupts every m sec. Among these, in the "interrupt control" subroutine, erase, supply [MG, register M
C.

Performs total counter off, halogen lamp, -like charging, development solenoid, separation switching, bias voltage, binding margin control, etc.

Next, specific operations of major subroutines in the above-mentioned main routine will be explained.

The "initial setting of paper feed tray" process is executed by a program as shown in FIG. 17(c). According to this, the first paper feed tray is automatically selected when there is paper (transfer paper) on the first paper feed tray and the first paper feed tray is set;
This is when there is no vapor on the second paper feed tray or the second paper feed tray is not set.On the other hand, the second paper feed tray is automatically selected when there is no vapor on the first paper feed tray. Or the first
This is a case where the paper feed table is not set, and there is vapor on the second paper feed table, and the second paper feed table is set.

The "initial jam check" process is executed in the flow shown in FIG. 18 when the main switch is turned on, when the jam reset key is turned on, and when the door is closed after inspecting the inside of the copying machine.

The "scanner initialization" process in the scanner control of the image exposure optical system takes a considerable amount of time, so as shown in FIG. The configuration is such that eight types of work are executed one by one each time it is called at an interval of 11 Ilsec. The flow of each work is 20th (a)
) to FIG. 20(h). "rREADY, which is the scanner operation preparation after initialization J is completed.
J 59- Ushijiri and S'-1・+jh i Birth year D control 7B and S Y: Each flow of ffi principle is as shown in Figure 25 and Houki 22, respectively. SYj'd principle (here 17N l, Lh, the contents of the commi roll will differ depending on whether the sujiyana is moving forward or turning. When moving forward, it will be hit from 5CAN to Figure 23 (d).
The rNGj process is a process to be performed when there is an abnormality in the serviceman call/scanner, and its flow is as shown in FIG.

- Pick up paper stand system! 0;, Vapor! 'Remaining amount display control', '
The flowcharts of the processes ``Paper size control'', ``Original forgotten display control'', and ``Inching control j'' are shown in FIGS. 25 to 29, respectively. Detection at the end of copying” process is the third
The process is executed according to the flow shown in Figure 0. There are two main ways in which copying ends: when all the copies for the set number of sheets are completed, and when copying ends midway due to the stop key or interrupt key being turned on during continuous copying, vapor end, jamming, etc. There are two ways, the former is 1 or more 6
After the flow below 0- is processed by the flow below ■, the process of the flow below Φ is executed in both cases.

"Door-related control" and "toner density control".

The flowcharts of the processes of "jam-related control,""serviceman call-related control,""fixing and drum temperature control," and "paper size and paper end detection" are shown in FIGS. 31 to 36, respectively. .

The "magnification control" process consists of detecting the lens position, changing the magnification ratio, initializing the lens, operating the lens stopper solenoid and lens motor, and stopping the lens at a specified position. 37(a) to 37th (
e) Processed according to the flow shown in the figure.

The "control at auto clear" process is executed according to the flow shown in FIG. In the sort/stack mode, when the auto clear time has elapsed, a mode and shut-off signal is sent to the sorter asking if it is OK to perform auto clear, and if there is vapor in the sorter bin, auto clear is not possible. becomes. Further, the "machine busy control" process is executed according to the flow shown in FIG. 39. There are two types of machine busy states for this copying machine: cases where there is some kind of abnormality and the machine busy state cannot be released unless the problem is corrected, and cases where the machine busy state is automatically released after a certain period of time. There is. The former case is processed according to the flow Φ, and the latter case is processed according to the flow Φ.

The "copy start control" process is executed according to the flow shown in FIG. 40. There are two types of print start: when the print key is turned on and when the print is started automatically when using the ADF or 5ADF. If it is not after the scanner returns, that is, if it is immediately after the copy start, the above-mentioned "mode setting" process (No. 14 (1))
(see figure) will be implemented.

The "peripheral device control" process is executed according to the flow shown in FIG. When there is necessary information, information is exchanged between the main body of the copying machine and the ADF or sorter in units of 10 m5ec. The method of transmitting and receiving information is done using an 8-bit code.The lower 6 bits represent the content of the information, and the upper 2 bits use a handshake method, which is used as a signal to determine whether the two are ready to receive information. ing. Among the subroutines in this flow, "Copy Star 1-Control", "Size Unification Mode Control", "
The processes of "Peripheral machine busy check" and "Peripheral machine jam processing J" after copying machine jam processing are executed according to the flowcharts shown in FIGS. 42 to 45.

Next, the operation control mechanism of the ADF of the peripheral device will be explained. There are three basic modes of operation:

(1) Pressing plate mode: A mode in which the ADF transport section is used as a document pressing plate without using the ADF.

(2) SADF mode: A mode in which originals are manually set one by one.

(3) ADF mode: A mode in which multiple originals are set and automatically fed one by one.

In addition to this, it has the following three additional functions.

(1) Unified mode: Unifies the copy size by cooperating with the copying machine.

(2> APS mode: Select the copy size that matches the original by selecting the counterfeit copy paper.

(3) Free run mode: Operates without feeding transfer paper.

The main routine of operation control in this ADF consists of the flow shown in Figure 46.
Executed every sec. Among the subroutines in this flow, "paper feed clutch control".

"Lift switch and safety switch control".

"Jam operation", "motor abnormality check", "copy machine jam control", "interrupt (copy) control".

The processes of "sheet feeding control", "sheet discharging control", and "sheet feeding, paper discharging, document size sensor check" are executed according to the respective flows shown in FIGS. 47 to 55, respectively.

64- Next, sorter operation control II will be explained. As mentioned above, there are four basic modes of operation: normal mode, sort mode, stack mode, and blank paper mode, and as an additional function, it is possible to sort and stack paper by inserting paper from the manual insertion slot. It has a manual feed mode, a dual mode that uses both storage pins divided into two blocks, and two types of free run modes. The main routine for operation control is structured in the flow shown in Figure 56, and the time required for one cycle is approximately 500 minutes.
It varies from μsec to 3m5ec.

And in the subroutine of this main routine,
The processes of "manual feed detection control", "jam check during sorter stop", "dual mode check", and "free run control" are executed according to the respective flows shown in FIGS. 57 to 60, respectively.

The process of "exchanging signals to the copying machine" consists of 1
5 types of input signals, namely sorter start, copy machine jam, double-sided copy, double-sided copy cancel, copy ejection signal 2
Normal copy mode, sort mode, stack mode, interrupt cancellation, blank page mode.

Sorter reset, auto clear, interrupt, set number (lower),
The process is carried out in different flows depending on the number (upper order). Among these, the processing in sort mode and stack mode is carried out according to the flow shown in FIG. 61. Further, the "conveyance/pin control" process is executed according to the flow shown in FIG. 62. In this case, step 1 is control from the paper ejection signal from the copier to turning on the entrance sensor, step 2 is from there until the registration sensor is turned on, step 3 is from then on until the entry sensor and paper ejection sensor are turned on, and step 4 is the control from there until the registration sensor is turned on. On time, step 5 represents the period from detection of the trailing edge of paper to detection of completion of paper storage in each bin and turning off the pin solenoid, and step 6 represents the period from then until the end of the sorter operation, and the processing subroutines in each step are shown in FIGS. The result is as shown in FIG. 68.

Here, the subroutine of the above-mentioned interrupt routine will be explained.

"Main motor off control" of "Interrupt I".

``Main motor on control'', ``Register jam check'', ``Separation jam check'', ``Fixing jam check'', ``Paper discharge jam check'', ``Discharge jam check'', ``Paper discharge control'' to the sorter.

"Copy end control", "Scanner return control",
The processes of "copy control", "control of total counter and paper feed MC (magnetic clutch) on-time operation", and "setting of copy number counter up/CTP2" are as follows:
They are executed according to the respective flows shown in FIGS. 69 to 81, respectively.

Also, ``Erase control'' and ``Paper feed M'' of ``Interrupt If 11''
82 and 83, respectively.

Here, CTP+ and CTP2 represent MC operation signals for the first paper feed tray and the second paper feed tray, respectively.

The processes of auto mode copy start, ADF copy start, unified mode, automatic paper feed selection (APS) mode, and peripheral device busy check in the "peripheral device control" subroutine are shown in FIGS. 84(a) to 84.
(e) Executed according to each flow shown in the figure.

Therefore, in the present invention, when page alignment is not necessary, that is, when the ADF
When there is only one original in the mode and in the stack mode, the copy is automatically ejected with the image side facing up.

A part of the control mechanism for controlling this operation is shown in a block diagram in FIG. 85, and its timing chart and flowchart are shown in FIGS. 86 and 87, respectively.

The 141J production control mechanism shown in FIG. 85 includes a main body control circuit 200 that roughly controls the operation of the copying machine main body, and a document feeding control circuit 201 that controls automatic (8DF) or semi-automatic (SADF) feeding of documents. and a sorter control circuit 202 that controls stacking and sorting of copy sheets after copying has been completed, and these various control circuits 200, 201 and 202 are interfaced with each other and control the operation of each component of the copying machine. is connected to control the In this embodiment, these control circuits 200, 201, and 202 are each configured with a microprocessor.

Main body control circuit 200 is connected to RAM 207 via a bus. These ROM group 203 stores various instructions before and during copying on the main body side, and
Various commands for peripheral units are stored, and appropriate commands are read out under the control of the main body control circuit 200 to control the operation of required parts. Some ROMs in the ROM group 203 are connected to the main body control circuit 200 via an address latch circuit 204. Furthermore, system logic 2
05 and a chip selector 206 are provided connected to the main body control circuit 200. Also, I10 port/RAM2
07 and I10 ports 208 and 209 are connected to the main body control circuit 200 and ROM group 203 via a bus, and are connected to a chip selector 206 via a signal line.

The I10 boat/RAM 207 is connected to the document feed control circuit 201 via an 8-pit data bus. on the other hand,
The I10 port 208 is connected to each component on the copying machine main body side, such as a developing section and a transfer section, via a driver 210, and controls each component by one drive. In this embodiment, specific drive control of each load is performed by means of a clutch, a solenoid, and a unit 1 trigger. The I10 port 209 on the salmon side is connected to a reverse coro solenoid 212a, a resist clutch 212b, and a resist clutch 212b via a driver 211.
It is connected to the current motor 212C and the main motor 212d, and controls the driving of these motors.

A print button 213 is provided connected to the main body control circuit 200. Although other buttons and switches provided on the copying machine are connected to the main body 11110 circuit 200, they are omitted in FIG. 85 for the sake of simplicity.

A pair of switches 2 are connected to the document feed control circuit 201.
20 and 221 are provided. Switch 220 is A
This is a switch for DF mode selection, and the switch 221
are switches for selecting the 5ADF mode, and these switches are selectively controlled on/off by the operator. A pair of indicators 222 and 223 are connected to the document feeding control circuit 201 and correspond to the pair of switches 220 and 221, respectively. Indicator 222 shows ADF, indicator 223 shows 5ADF
The display is in progress, and in response to each corresponding switch being turned on, a display indicating that ADF or 5ADF has been selected is made.

The original feed control circuit 201 is connected to a motor control circuit 230, and the motor control circuit 230 is connected to the original transport motor M2 and the original paper feed motor M1 via a bus. Motors M2 and Ml receive the 5V and GND voltages via buses 231 and 232, while supplying encoder outputs (rotation status of the motors) to motor control circuit 230 via buses 233 and 234. Motor M1
and M2 each receive positive and negative rotation support signals from the motor control circuit 230, making it possible to perform rapid rotation control. A document discharge sensor 240 is connected to the document feed control circuit 201 at 71-, and a signal from this sensor 24.0 is used to check whether a document is present on the platen of the copying machine.

Furthermore, a document sensor 241 is connected to the document feed control circuit 201 and desired information regarding the document to be copied is supplied to the document feed control circuit 2011\. In the illustrated example, the original mt sensor 241 has a signal line 242 that supplies a signal from a document feed sensor, and a group of signal lines 243 that supplies a signal representing the size of the document. The signal from the document feed sensor is a signal indicating whether or not a manuscript is set in the paper feed section of the copying machine.

In the operation control system shown in FIG. 85, the operation sequence for fully automatic feeding of originals, that is, copying by ADF operation, is shown in the flowchart of FIG. The timing chart of the signals used when copying in the 86th mode
It is shown in the figure. The operation shown in FIG. 85 will be described below with reference to FIGS. 86 and 87.

72- Mode is ADF11 Need 1, ;2 Constant FL, AD
F2, switch 22 On: ; When f is turned on (Fig. 86, A>, the signal is f'(' then I10 boat/RA 7Vl 207 '\transmission)], 17'○Boi~・The ADF mode flag is set in the RAM 207 (Fig. 86, B).
A D F F When the need flag is set, 1
The word is sent to the egg control circuit 2820″1, and AD
Turn on the F indicator 222 in Fig. 86, C), AD
Displays that F mode has been selected.

In that state, the operator presses the print button 213.
When pressed down (FIG. 86, D), a print signal is supplied to the water body opening/opening circuit 200, and the main motor 212dIJ is driven and rotated via the I10 boat 209 and driver 211 (FIG. 86, E). If the document feeding flag is in the reset state, the Wm paper feeding prohibition timer is turned on as the print push button 213 is pressed down, and the set 1 to state is maintained for a predetermined time (FIG. 86, "). This time is This is a preparation period for the copying machine to take a predetermined timing before starting the copying operation.In the illustrated example, the document feed timer is configured by a register, etc. in the /○ port/RAM 207. ing.

When the document feed prohibition timer is reset after a predetermined period of time, the document feed motor M1 is turned on in synchronization with this (FIG. 86, G) and the document is fed! 71st work will be started. When the document feeding operation is started, a document feeding flag is set in the I10 port/RA IVI 207 (FIG. 86, 1).

When a predetermined period of time has elapsed after the document feed motor /11 was turned on, the document discharge motor M2 is automatically turned on (Fig. 86, day). Therefore, the document is smoothly transported from the paper feed section. transported to the department.

When the document is conveyed and removed from the paper feed section, since there is only one document in this example, the signal from the document feed sensor is reset (FIG. 86, J). On the other hand, if a large number of originals are stacked in the paper feed section, the set state will be maintained as long as the documents remain in the paper feed section, and the state will be reset when the last document leaves the paper feed section. . When the signal from the document feed sensor is reset, the document feed motor M1 is turned off (FIG. 86, G), and the document discharge motor off timer is turned on (FIG. 86, O). .still,
This document ejection motor off timer is also set to I1 by a register etc.
It is formed in the 0-vote RAM 207.

Next, if the flag for detecting the trailing edge of the document is set, the process moves to the step of determining the document stop timing as shown in the flowchart of FIG. 87, but in this example, as shown in FIG. As shown, the trailing edge detection flag is in the reset state, so the process moves to the determination step of detecting the trailing edge of the document. In this state, when the trailing edge detection sensor detects the trailing edge of the document (Fig. 86, K), the trailing edge detection flag is set (Fig. 86, L).
The state is held in M207. On the other hand, when the trailing edge is detected, a pulse is sent to the document feed counter (Fig. 86, N>), and the counter is incremented by +1.
It is formed within 01.

In this state, in this example, there is only one document, so in the flowchart of FIG. 87, the result of determining whether there is a document in the document feeding section is negative, and Since the count of the paper feed counter is 1, the face-up mode flag is set (N in FIG. 86). Next, when the program returns to the start, the document feeding flag is set, so the program moves to the document trailing edge detection flag determination step, and since the document trailing edge detection flag is set, The process moves to a branch sequence and reaches the document stop timing determination step.

As a result, the document ejection motor off timer is reset after a predetermined period of time, the WCN wandering paper motor M2 is turned off (see eye in FIG. 86), and both the document feeding flag and trailing edge detection flag are reset. (Fig. 86, ■
and L). On the other hand, the reset from the document ejection motor off timer
76- In synchronization with the ceramic signal, the original setting completion flag is set to 1~ (FIG. 86, P), and the setting of the original at a predetermined position on the platen is completed. Next, as shown by signals Q and R in FIG. 86, the scanner moves forward and backward to scan the document and form an electrostatic latent image on the photosensitive drum.

The above explanation is based on the ADF operation when there is only one original, but if there are many originals, the mode will not be face-up mode but face-down mode, and page alignment etc. will be performed. is possible. As described above, the operation mode of the copying machine of the present invention is not limited to the above-mentioned specific mode, but it goes without saying that it can operate in various modes.

Effects As detailed above, according to the present invention, it is possible to align the page order of both the original and the copy to be ejected at the same time, and when page alignment is not required, copies can be selectively made with the image side facing up. can be discharged.

It should be noted that the present invention is not limited to the above-mentioned specific actual flow example, and it goes without saying that various modifications can be made within the technical scope of the present invention.

[Brief explanation of the drawing]

Figure 1 is an overall explanatory diagram showing one embodiment of the present invention, and Figure 2 (
Figure a) and Figure 2(b) are a perspective view and an explanatory view showing the release FIa groove of the upper unit, respectively, and Figures 3(a) to 3(C)
The figures are explanatory diagrams showing the configuration of the photoreceptor drum 1, respectively;
FIG. 4 is an explanatory diagram showing the electrostatic charger 3, i5 <a
) to 5() are explanatory diagrams showing the mechanism related to the optical unit 6, respectively, FIG. 5(q) is a block diagram showing a control circuit for the scanning operation of the optical unit 6, and FIG.
FIG. 6(a) and FIG. 6(b) are explanatory diagrams showing the developing device 7, respectively, FIG. 6(C) is a block diagram showing the toner density control circuit, FIG. 7(a), and FIG. b〉The figures show the transfer section 8.
FIGS. 8(a) to 8(h) are explanatory diagrams showing the configuration of the cleaning device 9, and FIG. 9 is a perspective view showing the configuration of the paper feed tray 111. , 10th
The figure is a schematic diagram showing the fixing section 12 and the reversing/discharging section 13,
11(a) to 11(g) are explanatory diagrams showing the mechanism related to the fixing unit 12, and FIG.
13(c) is an explanatory diagram showing the mechanism related to the reversing part work 3, FIGS. 13(a) to 13(h) are explanatory diagrams showing the mechanism related to the double-sided tray 14, and (a) Figure,
Figure 14 (b) is an explanatory diagram showing the transfer paper conveyance operation, a flowchart diagram showing the operation procedure, and Figure 15 (
a) to 15(k) are explanatory diagrams showing the mechanism related to the ADF device (b), and 16(a) to 16(k) respectively.
Fig. 17 (a) is a flowchart showing the main routine of overall operation control of one embodiment of the present invention, and Fig. 17 (
b) The figure is a flowchart diagram showing "interrupt processing", Part 1
Figure 7(c) and Figures 18 to 38 and 38(a)
38 (c,) and 39 to 45 are flowcharts showing each subroutine in the main routine, and FIG. 46 is a flowchart showing the main routine for operation control in the ADF. Figures 47 to 79-55 and 55(a) to 55(f) are flowcharts showing subroutines of the main routine in the ADF, respectively. 56 (
a) Figures 57, 57 (a) to 57 (d), 58 to 68, and 68 are flowcharts showing the main routine of operation control in the sorter.
68(a) to 68(c) are flowcharts showing subroutines of the above main routine, and 68(c) respectively.
9 to 83 and 84 (a) to 84 (
e) The figures are flowcharts showing the subroutine of interrupt processing J, and Figures 85 to 87 show the operation control circuits between the copying machine main body (A), ADF (B), and sorter (C), respectively. They are a block diagram shown, a timing chart showing operation timing, and a flowchart showing an operation program. : 200 : 201 : 202 : Reversing/discharging section main body control circuit Document feeding control circuit Sorter control circuit

Claims (1)

[Scope of Claims] 1. A tray for stacking recording paper to be fed to an image recording section of a recording device, comprising a positioning member for positioning the end of the recording paper, and a guide rail for guiding the positioning member. , a locking member that is swingably locked to the positioning member and can be moved to a position in which it contacts and does not contact the guide rail by swinging; and a locking member that presses the locking member in a direction in which it contacts the guide rail. A paper feed tray comprising an elastic member and a recording paper positioning device that can be stopped and locked at any position. 2. The paper feed tray according to claim 1, wherein the guide rail is subjected to tufftride treatment.