JPH0286543A - Paper exhausting device for copy machine - Google Patents

Abstract

PURPOSE:To prevent a copied and exhausted transfer paper from sliding into a copy machine body from the upper surface of a paper exhaust tray by providing a holding means for holding the transfer sheet on the paper exhaust tray when the position of the paper exhaust tray is displaced from a second set position to a first set position. CONSTITUTION:In the normal state where a copy machine is not in the copy motion state, a paper exhaust tray 50 is situated in a first set position where the projected area of a flat surface protruded from the copy machine body side is reduced. The paper exhaust tray 50 is situated in a second set position where the projected area of the flat surface protruded from the copy machine side is extended only when the copy machine is in the copy motion state, and returned to the normal first set position when the copy motion of the copy machine is finished. When a transfer sheet is left on the paper exhaust tray 50 at the time of moving the position of the paper exhaust tray 50 from the second set position to the first set position due to the completion of the copy motion of the copy machine, the transfer sheet on the paper exhaust tray 50 is held so as not to move by a holding means 61.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a paper discharge device for a copying machine, and for example, a paper discharge M1 device for a copying machine in which a paper discharge tray and a paper feed cassette are located on the same side. It is related to.

[Prior Art] As a conventional paper ejecting device for this type of copying machine,
Can you name the technology published in Publication No. 100243?

The paper ejection device of the copying machine of the above technology includes a copying machine main body equipped with a paper ejection port from which copied copies are ejected, and a copying machine provided at the paper ejection port of the copying machine main body to accumulate the copy sheets. In the copying machine equipped with a paper discharge tray, the paper discharge tray is pivotally supported on the main body of the copying machine via a toggle mechanism so that it can be rotated as required.

Therefore, due to the structure described above, if the paper ejection tray gets in the way when installing the paper cassette into the copying machine main body, the paper ejection tray can be removed using the toggle mechanism installed between the paper ejection tray and the copying machine main body. It can be rotated through the section and moved to a side position of the copying machine main body.

[Problems to be Solved by the Invention] Since the paper ejection device of a conventional copying machine is configured as described above, if the paper ejection tray becomes an obstacle when installing the paper feed cassette in the copying machine main body, In this case, it was necessary to manually move it to the side of the copying machine. In addition, especially when a manual feed tray is installed on the upper surface of the paper feed cassette 1, the paper ejection tray becomes an obstruction, and the paper feed tray i The differential tray was not easy to use.

For this reason, when the paper feed cassette is disposed at the lower stage of the paper discharge I-sea, the manual feed tray cannot be formed on the upper surface of the paper feed cassette, and the degree of freedom in design is restricted accordingly.

The paper ejection device of the conventional copying machine mentioned above overlooks the fact that the transfer sheet is placed on the paper ejection tray, and transfers the ejection sheets 1 to 1 through the tray through a toggle mechanism disposed between the main body of the copying machine and the transfer sheet. When the transfer sheet is rotated and moved to a side position of the copying machine main body, there is a possibility that the transfer sheet on the paper ejection tray may enter the copying machine main body and cause a paper jam.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a paper ejecting device for a copying machine that does not get in the way when replacing a paper feed cassette or using a manual feed tray, and in which transfer sheets are not easily jammed.

[Means for Solving the Problems] A paper ejecting device for a copying machine according to the present invention has two positions: a first setting position in which the projected area of the plane protruding from the copying machine main body side is small; a second set position with a larger projected area; a second set position with a larger projected area; a second set position with a second set position;
and a holding means for holding the transfer sheet on the paper discharge tray when the transfer sheet is displaced from the set position to the first set position.

[Operation] In the present invention, in a normal state not in a copying operation state,
The position of the paper ejection tray is set to the first setting position where the projected area of the plane protruding from the copying machine main body side is reduced, and only when the copying machine is in the copying operation state, the position of the paper ejection tray is set to the plane protruding from the copying machine main body side. is set to a second setting position with a larger projected area, and when the copying operation of the copying machine is completed, it is returned to the first setting position in the normal state.

1. When moving the paper output tray position from the second setting position to the first setting position when the copying operation of the copying machine ends, etc., if the transfer sheet remains on the paper output tray, , the transfer sheet 1- on the paper output tray is held by the holding means so that it does not move with the movement of the paper output tray, and the transfer sheet is moved to the first setting position while holding the transfer sheet on the paper output tray. , and is always stopped at the first setting position except in the copying operation state.

[Example] The present invention will be explained in detail below.

FIG. 2 is an overall configuration diagram of a copying machine including a copying machine main body and its paper ejecting device according to an embodiment of the present invention.

In the figure, an original placed on an original glass 1 is exposed to a CCD line sensor 4 by an exposure lamp 2 and a lens array 3, and is colored in three primary colors: R (red), G (green), and B (blue). Read as a signal. This R,
The G and B color signals are converted by the image processing circuit into Y (yellow), M (magenta), C (cyan), or three or four types of signals including these plus BK (black). , is transmitted to the laser optical system 6 as an output signal. Note that the copying machine of this embodiment does not have image memory for three colors, and the image reader units 1 to 5 scan each time when forming an image for each color, and based on this scan, sequentially YSM, YSM,
C, Y, M, C, and BK signals are transmitted to the laser optical system 6.

The laser optical system 6 includes a scanning polygon mirror 7, an Fθ lens 8, a reflection mirror 9, etc., and emits image-forming laser beams for each color based on the Y1M, C or Y, M, C, BK signals. Exposure is performed by irradiating light toward the photosensitive drum 10.

The photosensitive drum 10 is rotationally driven in the direction of the arrow shown.

The surface portion of the photosensitive drum 10 is provided with an organic photoreceptor laminated on a conductive substrate, and in particular, an organic photoreceptor is used that exhibits high sensitivity at a laser emission wavelength of around 780 nm.

A drum cleaner 12, a toner collection roll 13, an eraser lamp 14, and a charger 11 are arranged around the photosensitive drum 10, and in this embodiment, the organic photoreceptor is negatively charged by the charger 11. . Further, four types of developing devices are arranged around the photosensitive drum 10. A first developing device 15 uses yellow toner, a second developing device 16 uses magenta toner, and a third developing device 16 uses magenta toner. The developing device 17 supplies cyan toner and the fourth developing device 18 supplies black toner, and these toners are negatively charged. In addition, toner replenishment is performed by transferring the toner of each color stocked in the toner hopper 19 to the yA imager 15, the second developer 16, the third developer 17, and the fourth developer of the container 1 based on the replenishment signal. This is done by transferring the liquid to the container 18 via a pipe (not shown).

Transfer sheets such as plain paper or OHP films are stored in a stacked state in a lower paper feed cassette 20a and an upper paper feed cassette 20b, and are transferred to a transport roller 22 by a lower paper feed roller 21a or an upper paper feed roller 21b, etc. The sheets are then fed one by one toward the transfer drum 30 via the guide plate 23. The upper paper feed cassette 20b is a so-called universal paper feed tray in which a manual feed guide 20G constituting a manual feed tray is disposed on its upper surface.

Then, when the leading edge of the transfer sheet comes into contact with the registration roller 24, the transfer sheet is temporarily stopped and the subsequent timing is determined, and skew correction is performed at the same time.

The vapor sensor 25 is used for this purpose.

The transfer drum 30 is driven to rotate in the direction of the arrow, and, as is well known, is composed of an aluminum drum frame and a dielectric screen stretched in a cylindrical shape and supported by the drum frame.

A plurality of tip chucking claws 31 are provided around the transfer drum 30. The leading end chucking claw 31 is used to chuck the leading end of the transfer sheet that is timed by the registration rollers 24. That is, the tip chucking claw 31 opens when it rides on a not-illustrated guide rail disposed inside the transfer drum 30. The leading end of the transfer sheet fed from the registration roller 24 and guided by the transfer sheet guide 26 is placed between the leading end chucking claw 31, which is required to be in the open state, and the separation pressing claw, not shown, which is in the closed state. inserted into. Then, as the transfer drum 30 rotates, when the leading edge chucking claw 31 passes the guide rail, the leading edge chucking claw 31 closes and chucks the leading edge of the transfer sheet.

On the other hand, when separating the transfer sheet from the transfer drum 30, the leading end of the transfer sheet is pushed up in conjunction with the opening movement of the leading end chucking claw 31.

As a result, the leading end of the transfer sheet is unchucked by the opening action of the leading end chucking claw 31, and then is actively separated from the surface of the transfer drum 30 by the pushing up action of the separation pressing claw.

As shown in the figure, a frame 32 supporting the transfer drum 30 is rotatably supported by the main body around a rotating shaft 33.
It is biased clockwise by a spring 34. As a result, the transfer drum 30 is brought into pressure contact with the positioning roller 35 disposed on the photosensitive drum 10 side, and the distance between the photosensitive drum 10 and the transfer drum 30 is kept constant.

On the inner peripheral side of the transfer drum 30, as shown in the figure, an adsorption charger 36, a transfer charger 37, and a first static elimination charger 38 are arranged. Further, a ground electrode 4 is provided on the outer peripheral side of the transfer drum 30, facing the adsorption charger 36.
1, a second static elimination charger 42 is disposed opposite to the first static elimination charger 38, respectively. A separation claw 44 is provided in the transfer sheet transfer direction of the second static elimination charger 42 . Further, the position detection sensor 39 is connected to the transfer drum 3.
It detects the zero rotational position.

The adsorption charger 36 performs a negatively charged corona discharge to negatively charge the dielectric screen of the transfer drum 30,
The tip is attached to the transfer drum 3 by the tip chucking claw 31.
The transfer sheet, which is sent while being chucked at zero, is electrostatically attracted to the dielectric screen. At this time, the ground electrode 41 ensures electrostatic attraction of the transfer sheet onto the transfer drum 30.

The transfer charger 37 is disposed at a transfer portion where the photosensitive drum 10 and the transfer drum 30 are closest to each other, and electrostatically transfers the toner image on the photosensitive drum 10 to a transfer sheet on the transfer drum 30 by positively charged corona discharge. It is something.

The first static elimination charger 38 and the second static elimination charger 4
2 both use AC power to remove static electricity; these 1
The set constitutes a static elimination charger.

The first static elimination charger 38 mainly eliminates static electricity from the dielectric screen to reduce the electrostatic attraction force of the transfer sheet. The second static elimination charger 42 mainly eliminates static electricity from the surface of the transfer sheet during separation, and also prevents discharge accompanying separation, thereby preventing the drawn toner image from scattering.

The transfer sheet separated from the transfer drum 30 by the separation claw 44 is sent to a fixing device 46 by sheet conveyance means such as a conveyor 45, where it is thermally fixed, and then the discharge sheets 1 to 1 are
is discharged to the tray 50 side.

Next, a mechanism on the paper ejection tray side, which is a part of the main part of the embodiment of the present invention, will be explained.

FIG. 1 is a perspective view showing the mechanical structure of a part of a paper ejecting device of a copying machine according to an embodiment of the present invention. 3 is an explanatory diagram of the first setting position for explaining the operation of the mechanical structure of the paper ejection device of the copying machine of the embodiment shown in FIG. 1, and FIG. 4 is an explanatory diagram of the second setting position. FIG.

In the figure, the paper output tray 50 is fixed to a rotating shaft 51, and a driven gear 52 is disposed at the end of the rotating shaft 51.
The first setting position has a smaller projected area of the plane protruding from the copying machine main body side, and the second setting position has a larger projected area of the plane protruding from the copying machine main body side. It will be done. That is, the first setting position in which the projected area of the plane protruding from the copying machine main body side is reduced is a position where the paper discharge tray 50 is rotated about the rotation shaft 51 and is substantially parallel to the side surface of the copying machine main body. and manual feed tray 20G
This is so that it does not get in the way when feeding the transfer sheet. In addition, the second setting position in which the projected area of the plane protruding from the copying machine body side is increased is the paper output tray 5.
0 is a position where the rotation shaft 51 is rotated and the transfer sheet is ejected.

A driven gear 52 that rotates the rotation shaft 51 receives rotational force from a drive gear 53 attached to the output shaft of a tray setting motor 55. Note that the driven gear 52 and the driving gear 5
3 constitutes a reduction gear 54. Therefore, the paper discharge tray 50 can be stopped at the first setting position or the second setting position via the reduction gear 54 by the rotation of the tray setting motor 55.

The rotation of the paper discharge tray 50 to the first set position or the second set position is detected by a retracted position sensor 56 and a fixed position sensor 57 provided on the tray holding plate 58. The retraction position sensor 56 is composed of a microswitch, and only when it is in the first set position, the microswitch is pressed at the end of the paper discharge tray 50 to generate an on signal. Further, the fixed position sensor υ57 is also composed of a microswitch, and only when it is in the second set position, the microswitch is pressed at the end of the paper discharge tray 50 to generate an on signal.

Incidentally, the tray setting motor 55, the reduction gear 54, and the rotating shaft 51 constitute a driving means for displacing the paper discharge tray 50 to the first setting position and the second setting position.

A fulcrum shaft 60 is disposed above the paper discharge tray 50 in parallel to the rotation shaft 51 . A holding member 61 bent in an oval shape is disposed approximately at the center of the fulcrum shaft 60. A contact sensor 62 is provided at the jJ7 curved portion of the holding member 61.
is installed. Further, a driven gear 63 is disposed at the end of the fulcrum shaft 60, and the driven gear 63 is connected to a drive gear 6 disposed on the output shaft of a paper holding motor 66.
Rotated at 4. Note that the driven gear 63 and the driving gear 64 constitute a reduction gear 65. That is, the holding member 61 disposed approximately at the center of the fulcrum shaft 60 presses the transfer sheet ejected onto the paper discharge tray 50 with the contact sensor 62 at the bent portion of the holding member 61, and the paper discharge tray 50 and holding member 61
The contact sensor 62 on the folded portion of the sheet grips the transfer sheets 1 to 1 and changes the transfer sheet from the second setting position to the first setting without slipping off the paper ejection tray 50 while the transfer sheet is placed on the paper ejection tray 50. This is to evacuate to a certain position.

At this time, the paper holding motor 66, the reduction gear 65, the fulcrum shaft 60, the holding member 61 disposed approximately in the center thereof, and the contact sensor 62 serve as holding means in this embodiment for holding the transfer sheet on the paper discharge tray 50. constitutes a holding mechanism.

The paper holding mechanism detector 67 is used to determine whether the contact sensor 62 on the bending portion of the holding member 61 is equipped with a la mechanism for pressing and holding the transfer sheet discharged onto the paper discharge tray 50. A paper holding mechanism detector 67 consisting of a pair of a reed switch and a permanent magnet is disposed in the 1-Heley holding temporary 58 near the fulcrum shaft 60, and when the magnetic path is short-circuited by the fulcrum shaft 60, the reed switch is turned on. This determines that a mechanism for pressing and holding the transfer sheet is installed in the main body of the copying machine.

Further, the paper ejection detection sensor 68 detects the presence or absence of the transfer sheet 1- ejected to the paper ejection tray 50, and is composed of a pair of a light emitting element and a light receiving element, and the light emitted from the light emitting element is transmitted to the transfer sheet 1-. The presence of the transfer sheet is determined by the arrival of the light reflected by 1-.

The mechanical operation of the paper ejecting device of the copying machine of this embodiment configured as described above is as follows.

The position of the paper discharge tray 50 shown in FIG. 3 shows the stopped state at the first setting position.

In the normal initial setting state, that is, the home position, the paper discharge tray 50 is stopped at the first setting position via the reduction gear 54 by the rotation of the 1-ray setting motor 55. At this time, the paper ejection tray 50 is in a substantially parallel state on the side of the copying machine main body, and the manual feed guide 20c disposed on the upper surface of the upper paper feed cassette 20b has the paper ejection tray 50 positioned on its upper surface. Therefore, it can be used freely without any restrictions on its use.

In this state, the evacuation position sensor 56 has been generating an on signal since the discharge tray 50 was rotated to the first setting position. Further, the holding member 61 disposed approximately at the center of the fulcrum shaft 60 is rotated to the left and placed in the home position.

Then, the motor 55 for setting 1 to 55 rotates, the rotation shaft 51 rotates, and the paper discharge tray 5 attached to the rotation shaft 51 rotates.
When 0 arrives at the second set position, the home position sensor 57 generates an on signal. The position of the paper discharge tray 50 shown in FIG. 4 shows the stopped state at the second setting position at this time.

At this time, the paper discharge tray 50 is in a position on which the transfer sheet that has been thermally fixed by the fixing device 46 and discharged is placed thereon. Therefore, a normal copied transfer sheet is discharged to the paper discharge tray 50 after being fixed.

In addition, in order to return the paper output tray 50 to the home position with the transfer sheet ejected to the paper output tray 50 and still on the paper output tray 50, first rotate the paper holding motor 66. The fulcrum shaft 60 is connected via the reduction gear 63.
, and the holding member 61 is rotated to the right. When the contact sensor 62 presses the transfer sheet discharged onto the paper discharge tray 50 and detects that the transfer sheet is being suppressed with a predetermined pressure, the paper holding motor 66 is stopped in that state. Then, while pressing the transfer sheet with this predetermined pressure, the first to second setting motors 55 are rotated in the opposite direction to the direction in which they are moved to the second setting position, the rotation shaft 51 is rotated, and the paper is ejected. Rotate the tray 50 to the first setting position. When the paper discharge tray 50 reaches the first set position, the retreat position sensor 56 generates an on signal. Then, the paper discharge tray 50 is at the stop position shown in FIG.

Then, while the contact sensor 62 presses the transfer sheet discharged onto the paper discharge tray 50, it can be moved to the second setting position again.

FIG. 5 is an enlarged plan view of the operation panel on the top surface of the copying machine main body shown in FIG. 2.

The print start key 70 is used to start copying.
Numeric keys 71 to 80 are used to set the number of copies and magnification, and an interrupt key 81 is used to interrupt copying of another number of copies while a predetermined number of copies is being made. The clear/stop key 82 is used to clear the data displayed on the glyph display section 83, that is, the data input by operating the numeric keys 71-80.

Also, paper select keys 1 to 85 are operated to select the lower paper feed cassette 20a or the upper paper feed cassette 20b.
This allows you to select the paper type. A3→A4 reduction magnification selection key 86, A3→B4 reduction magnification selection key 87,
The A4→A3 magnification display 88, the B4→A3 magnification select key 89, and the same magnification select key 90 are for setting variable magnification.

The all clear key 91 is used to cancel the currently set data to the initial setting state, and the manual tray movement key 92 is used to move the position of the paper discharge tray 50 to the second set position.

Next, FIG. 6 shows a circuit diagram of a control means used in a paper discharge device of a copying machine according to an embodiment of the present invention.

In the figure, a microcomputer 100 having a RAM 110, which is an extended memory, performs various controls for copying in the main body of the copying machine, and also serves as a control means for controlling the position of the paper discharge tray 50 of this embodiment. A tray setting motor 55 is connected to the output of the microcomputer 100 via a driver 121 and an overcurrent detection circuit 122. The overcurrent detection circuit 122 is configured such that when an abnormal current is detected by the overcurrent detection circuit 122, the signal is inputted to the microcomputer 100.
The detection output of No. 2 is connected to the input of the microcomputer 100. Further, the microcomputer 100
The transfer sheet is output via a driver (not shown).
A holding motor 66 is connected. Note that the transfer sheet holding motor 66 may also have a circuit configuration similar to that of the 1-ray setting motor 55.

The microcomputer 100 includes a retraction position sensor 56, a fixed position sensor 57, a contact sensor +j 62, and a paper holding mechanism detector 67 set in the key human power matrix circuit 102.
, power switch 93 and the like are inputted via diodes, and the output of the paper discharge detection sensor 68 is connected to an analog input port of the microcomputer 100.

Further, the microcomputer 100 is connected to a key manual matrix circuit 102 controlled via a decoder 101, a display on a glyph display section 83, and an LED display group 103 for displaying various setting modes and the like. The input/output of the microcomputer 100 includes, via a driver (not shown), various motors that function as a known copying machine, a timing roller clutch, an upper paper feed roller 21b clutch, a lower paper feed roller 21a clutch, and charging. The image forming system of the charger 11 and the eraser lamp 14, the transfer system of the adsorption charger 36, the transfer charger 37, the first static elimination charger 38, and the second static elimination charger 42, and the necessary illustrations for controlling these systems. The outputs of various sensors that do not work are input.

Prior to explaining the paper ejecting device of the copying machine of this embodiment configured as described above, the general operation of full-color copying using four-color development of the copying machine will be explained. This operation will be explained later in “
This corresponds to "copy routine".

When the print 1-start key 70 is turned on, the image reader unit 5 scans, starts the image forming operation for the first color, and transfers the image from the lower paper feed cassette 20a or the upper paper feed cassette 20b to the transfer drum 30. Supply of the transfer sheet is started.

Scanning by the image reader unit 5, exposure by the laser optical system 6 based on the scanning, and formation of a latent image on the photosensitive drum 10 are performed by this exposure. A yellow toner image is formed on the drum 10 (this imaging system is a negative-positive system). This toner image is transferred to the transfer drum 30.
Electrostatically transferred to the upper transfer sheet.

Subsequently, an honorable mention operation for the second color is performed, and a magenta toner image is formed by the operation of the second developing device 16. In the same manner, the image forming operations for the third and fourth colors are performed, and by the operation of the third developing device 17 and the fourth developing device 18, a cyan toner image and black toner images 1 to 1 are formed. They are sequentially formed and transferred to a transfer sheet in sequence.

On the other hand, in parallel with the above-described image fraud operation, the adsorption charger 36
Electrostatic attraction of the transfer sheet by the transfer sheet, electrostatic transfer by the transfer charger 37, etc. are performed. That is, when the print start key 70 is turned on, the transfer sheet is fed toward the transfer drum 30, and the leading end of the sheet touches the leading end chucking claw 31.
Chucked by. Next, the adsorption charger 3
By the discharge of 6, the dielectric screen is negatively charged,
The transfer sheet is attracted onto the transfer drum 30 by this electrostatic attraction force. At this time, the contact of the ground electrode 41 enhances the suction effect of the transfer sheet to the transfer drum 30.

As the transfer drum 30 rotates, a first color toner image is transferred onto the transfer sheet fed to the transfer section by discharging a positive charge from a transfer charger 37. As a result, the yellow toner image on the photosensitive drum 10 is electrostatically transferred to the transfer sheet. At this time, the dielectric screen will be positively charged, and the transfer sheet will be electrostatically attracted by the electrostatic attraction force due to this polarity.

The transfer of the second color toner image, the third color toner image, and the fourth color 1 to toner images are performed in the same manner. As a result, a yellow toner image, a magenta toner image, a cyan toner image, and a black toner image are transferred onto the transfer sheet in an overlapping manner, and a full color toner image is transferred onto the transfer sheet in an overlapping manner to form a full color toner image. .

When such a transfer process is completed, the process moves to a sheet separation process.

In this separation step, the transfer sheet becomes separable from the transfer drum 30 due to the opening movement of the tip chucking claw 31 and the static elimination action of the static elimination charger 38 and the static elimination charger 42, and then due to the pushing up action of the lifting wind for separation. , the transfer sheet 1- is separated from the transfer drum 30 by the separation action of the separation claws 44 and guided to the conveyor 45.

Next, the operation of the paper ejecting device of a copying machine according to an embodiment of the present invention will be explained as follows.
This will be explained using a flowchart.

7 to 18 are flowcharts of a program for controlling a paper ejecting device of a copying machine according to an embodiment of the present invention.

FIG. 7 shows flowcharts 1 to 1 of a main program for controlling the microcomputer 100 of a copying machine according to an embodiment of the present invention.

First, in step M1, initial settings are performed by turning on the power. In this initial setting, the evacuation position movement permission flag, home position movement permission flag, copy flag, etc. are set to "O". In step M2, an internal timer that defines the time required for one routine of the main routine is started. After that, in step M3, a "power-on routine", which will be described later, is called, in step M4, "O1~Clear routine", in step M5, "key manual routine", and in step M6, "
In step M7, the ``manual tray movement routine'' is called, and in step M8, the routine is terminated after waiting for the internal timer to end.

Note that the length of time for one routine is determined by counting various timers used in the various routines described above.

That is, the end of each of these timers is determined based on how many times this routine has been executed.

When the power is turned on, first, the "power-on routine" shown in FIG. 8 is called in step M3, and in step S1 it is determined whether or not the power switch 93 is rarely turned on. That is, when the power switch 93 is pressed, the "retreat position" is checked in step S2 to inquire whether the paper ejection tray 50 can be moved to the first setting position where the projected area of the plane protruding from the copying machine main body side is reduced. ``Movement permission determination subroutine'' is called, and in step S3, ``evacuation position movement subroutine'' is called. In this embodiment, the power is turned on using the power switch 93.
This is done by a switch (not shown) separate from the above.

Further, when the "auto clear routine" shown in FIG. 9 is called in step M4, the end of the O1 to clear standby timer set in advance in step 846 (described later) is determined in step S4, and the auto clear routine is If it exceeds , the "evacuation position movement permission determination subroutine" is called in step S5, and the "evacuation position movement υ routine" is called in step S6. If the auto clear time has not been reached, exit from this routine.

When the "key manual routine" shown in FIG. 10 is called in step M5, the copy flag is set to "1" in step 311.
”, and in step S11 the copy flag is “
When Ot+, it means that the start key 70 for Pudding 1 has not been pressed yet, so in step 313, "
Also, in step 314, the ``pudding l-start routine'' is called. Step S
11, when the copy flag is 1'', it means that the print start key 70 has been pressed, so step S
At step 12, "other key human power routines" which perform key human power processing not directly related to the embodiment of the present invention are called.

When the "copying operation routine" shown in FIG. 13 is called in step M6, in step 841
is on, and when the position sensor 4-57 is on, it is determined in step 342 whether the copy flag is "1", and when the copy flag is "1", step 84
In step 3, the ``copy routine'' that performs the above-described copying operation is called to execute the copying. When the copying operation is finished, it is determined in step $44 whether the remaining number of copies is equal to rOJ, and rOJ is reached.
If it is J, it is determined that copying is completed, and step 345
At step 346, the copy flag is set to "Ot+", and at step 346, the auto clear standby timer is set and started.

Further, when the fixed position sensor 57 is off in step 341, when the copy flag is "Otp" in step 342, and when it is not determined that copying is completed in step S44, this routine is exited.

When the "manual tray movement routine" shown in FIG. 14 is called in step M7, it is determined in step 351 whether or not the manual tray movement key 92 is turned on.
When the on-edge is detected and the manual tray movement key 92 is on-edge, the "fixed position movement permission determination subroutine" is called in step 352, and the routine is called in step 353.
Call the ``fixed position movement subroutine'' and exit from this routine. Further, if it is determined in step 351 that the manual tray movement key 92 is not on-edge,
Break out of this routine.

Then, when the "all clear routine" shown in FIG. 11 is called in step 313, it is determined in step S21 whether or not the all clear key 91 is on edge, and when the all clear key 91 is rarely on edge, the "all clear routine" shown in FIG. "Evacuation position movement permission determination rib routine"
is called, and in step 823, the "evacuation position movement subroutine" is called. If the all clear key 91 is not turned on, the process returns directly.

Further, when the "pudding 1-start routine" shown in FIG. 12 is called in step 314, first, step S
In step 31, it is determined that the print start key 70 is on-edge, and when the print start key 70 is on-edge, the copy flag is set to "1" in step 332.
Then, in step S33, the "home position movement permission determination subroutine" is called, and in step 334, the "home position movement subroutine" is called. Further, if there is no on-edge of print star 1 to key 70, the process returns directly.

Next, the subroutines called in each of the above routines will be explained.

When the "home position movement permission determination subroutine" shown in FIG. 15 is called, the operating state of the home position sensor 57 is checked in step 861, and the home position sensor 57 is off and the paper output tray 50 is not at the second setting position. When this is confirmed, it is determined in step 362 whether the current of the tray setting motor 55 is normal, and when the current of the tray setting motor 55 is normal, the normal position movement permission flag is set to "1'' in step 363.
shall be. Further, when the fixed position sensor 57 is on or when the current of the tray setting motor 55 is abnormal, this routine is exited without setting the fixed position movement permission flag to 1''.

Further, when the "evacuation position movement permission determination subroutine" shown in FIG.
When it is confirmed that the seat 50 is not in the first setting position,
In step S72, it is determined whether the current of the tray setting motor 55 is a normal value, and when the current of the tray setting motor 55 is a normal value, the paper ejection detection sensor 68 is off in step S73, and the paper ejection I-sheet 50 is Determine whether there is a transfer sheet on the paper. When no transfer sheet is placed on the paper output tray 50, the evacuation position movement permission flag is set to 1 in step 878.
”.

When it is determined in step 373 that the paper discharge detection sensor 6 is on and that transfer sheets 1 to 1 are placed on the paper discharge tray 50, a mechanism for holding the transfer sheets on the paper discharge tray 50 is installed in step 374. Paper holding mechanism detector 67
If it is determined that a mechanism for holding the transfer sheet is installed on the paper discharge tray 50, the paper holding motor 66 is turned on in step 375, and the contact sensor 62 is turned on in step 876.
The paper holding motor 66 is rotated until a predetermined pressing force is obtained and the paper holding motor 66 is turned on. In step 376 the contact sensor 62
When it is determined that the button has turned on after obtaining a predetermined pressing force,
In step S77, the paper holding motor 66 is turned off, and in step S78, the evacuation position movement permission flag is set to "1".

Then, when it is determined in step 871 that the evacuation position sensor 56 is on, and when it is determined in step 372 that the current of the 1 to ray setting motor 55 is not a normal value, step 3
When it is determined in step 74 that a mechanism for holding the transfer sheet is not installed on the paper discharge tray 50, this routine is exited.

When the "fixed position movement subroutine" shown in FIG. 17 is called, the fixed position movement permission flag is set to 111 in step 381.
Determine whether it is IT, and the fixed position movement permission flag is “1”
At this time, in step 382, the tray setting motor 55 is turned on to the forward rotation side, and the paper discharge tray 50 is moved to the second setting position. When it is determined in step 383 that the fixed position sensor 57 is on, the routine of steps S81, S82 and step 383 is continued until the fixed position sensor 57 is turned on, and when it is determined in step S83 that the fixed position sensor 57 is turned on. In step 384, the tray setting motor 55 is turned off, and in step 385, the normal position movement permission flag is set to "Ot+", and this routine is exited.

Further, if the normal position movement permission flag is determined to be "O" in step 381, the tray setting motor 55 is turned off in step 384, the normal position movement permission flag is set to "O" in step 385, and this routine is exited. do.

Furthermore, when the "evacuation position movement subroutine" shown in FIG. Setting motor 55
is turned on to the reverse rotation side, and the paper discharge l/sheet 50 is moved to the first setting position. When it is determined in step 393 that the evacuation position sensor 56 is on, the routine of steps S91, S92, and step 393 is continued until the evacuation position sensor 56 is turned on, and when it is determined that the evacuation position sensor 56 is on in step S93, In step 394, the tray setting motor 55 is turned off, and in step 395, the evacuation position movement permission flag is set to "O", and this routine is exited.

Further, in step S91, the evacuation position movement permission flag is set to “O”.
When It is determined, the 1-Here setting motor 55 is turned off in step 894, and the evacuation position movement permission flag is set to "O'' in step S95, and this routine is exited.

As described above, when the printer 1 to star 1 to keys 70 are turned on, the paper ejecting device of the copying machine of this embodiment closes the copy flag to "1°" and executes the "regular position movement permission determination subroutine".
, calls the "fixed position movement subroutine", and increases the projected area of the plane that protrudes from the copying machine main body from the first set position where the projected area of the plane where the discharge 1 helay 50 protrudes from the copying machine main body is decreased. move to the second setting position,
When the fixed position sensor 57 is turned on, a "copying routine" for copying onto a transfer sheet is processed.

In addition, after processing the "copy routine" for copying onto a transfer sheet, the copy flag is set to "0" and the "evacuation position movement permission determination subroutine" and "evacuation position movement subroutine" are executed as the time set in the auto clear timer elapses. , the second setting position in which the projected area of the flat surface protruding from the copying machine main body side is increased, and the first setting position in which the projected area of the flat surface protruding from the copying machine main body side is decreased.
Return to the set position.

Therefore, when copying is performed on a transfer sheet, the paper ejection trays 1 to 50 are set to the second setting position where the projected area of the plane protruding from the copying machine main body side from which the transfer sheet can be ejected is increased. , at other times, it returns to the first setting position where the projected area of the plane protruding from the copying machine main body side is reduced. The tray 50 does not get in the way.

In addition, when the copying machine is in standby mode, the paper output tray can be placed in the retracted position, which is the first setting position where the projected area of the plane protruding from the copying machine body side is small, so the space around the copying machine can be utilized. It's easy to do.

Then, when the paper ejecting device of the copying machine of the above embodiment moves the position of the paper ejecting tray 50 from the second setting position to the first setting position after processing the "copying routine" for copying onto a transfer sheet, If the transfer sheets 1 to 1 remain on the paper discharge tray 50, the paper discharge detection sensor 68 detects this, and the paper holding motor 66, which constitutes the paper holding mechanism as the holding means of this embodiment, is driven, and a contact sensor 62 disposed on a holding member 61 disposed approximately at the center of the fulcrum shaft 60 grips the transfer sheet between the discharge sheets 1 to 50 and holds the transfer sheet. Then, the position of the paper discharge tray 50 is moved from the second set position to the first set position while maintaining the sandwiched state.

Therefore, when copying the same original using a manual tray including the manual guide 200 or the like, the copied and discharged transfer sheet must be removed from the paper output tray 50 when the transfer sheet is fed. Eject paper even if you don't have it! - Since the position of the sheet 50 can be retracted to the first setting position, the paper discharge tray 50 disposed above does not get in the way when using the manual guide 20G. Moreover, at this time, since the copied and discharged transfer sheet is held by being held by the contact sensor 62 disposed on the holding member 61 constituting the paper holding mechanism, the transfer sheet is This prevents the transfer sheets from slipping into the main body of the copying machine or from causing multiple transfer sheets to come apart. Therefore, it is possible to eliminate factors that cause paper jams in the copying machine main body or near the discharge port of the copying machine main body.

Then, the paper holding mechanism, which is the holding means in the above embodiment, calls the "evacuation position movement permission determination subroutine" and the "evacuation position movement subroutine" at the same time as the power is turned on. The state when the paper tray 50 is stopped halfway, or the state where the power is cut off when it is between the second setting position and the first setting position, or the projected area of a plane protruding from the copying machine main body side. In a state where the power is cut off while in the enlarged second setting position, etc.
Even if the user places a document on the top surface of the paper output tray 50 without knowing it, the document is held by the contact sensor 62 provided on the holding member 61 that constitutes the paper holding mechanism, so that the document is not placed at the first setting position. Even if the transfer sheet is retracted, the transfer sheet will not slip into the copying machine main body from the upper surface of the paper discharge tray 50.

Furthermore, when a predetermined period of time has elapsed after the copying operation is completed, even if the transfer sheet 1- is placed on the paper ejection tray 50, the "all clear routine" is activated and the "all clear routine" is activated by pressing the all clear key 91. ``routine'' calls the ``evacuation position movement permission determination subroutine'' and the ``evacuation position movement subroutine'', sets the first setting position as the home position of the paper output tray 50, and moves the transfer sheet to the first setting position while holding the transfer sheet. It can be evacuated.

By the way, the paper ejecting device of the copying machine of the above embodiment has two settings: a first setting position where the projected area of the plane protruding from the copying machine main body side is small, and a second setting position where the projected area of the plane protruding from the copying machine main body side is large. In the above embodiment, the paper ejection tray whose set stop position is a set position of The paper ejection tray is moved to the set position, but when implementing the present invention, the paper ejection tray plane is moved from the front and rear sides with reference to the rotating wheel formed approximately perpendicular to the side surface of the copying machine main body. The paper discharge tray may be configured to be moved from a first setting position substantially parallel to the copying machine main body to a second setting position having a predetermined opening angle or a plane perpendicular to the side surface of the copying machine main body.

Further, since the driving means for displacing the position of the paper ejection tray in the above embodiment to the first setting position and the second setting position is determined by the structure of the paper ejection tray, the present invention can be carried out. In this case, the structure is not limited to the above structure, and any means that can displace the paper discharge tray to the first setting position and the second setting position may be used.

When the position of the paper ejection tray in the above embodiment is displaced from the second setting position to the first setting position, the holding means for holding the transfer sheet on the paper ejection tray includes a paper holding motor, a reduction gear, The holding mechanism is made up of a fulcrum shaft and a holding member disposed approximately in the center of the fulcrum shaft, but when carrying out the present invention, the copying machine according to another embodiment of the present invention shown in FIG. As shown in FIG. 19, which is a perspective view of the main part of the paper ejection tray of the paper ejection device, a holding band 50a driven by an electromagnet 50b in a holder disposed on both sides of the paper ejection tray 50 is provided, and the holding band 50a is The transfer sheet may be held between the bands 50a. In this case, when the electromagnet 50b is energized, the holding band 50a is positioned at the solid line position in FIG. 19. The distance between the paper discharge tray 50 and the holding band 50a is widened to the extent that the discharge of the transfer sheet is not hindered. When the electromagnet 50b is de-energized, the holding band 50a is located close to the paper discharge tray 50, as shown by the dashed line in FIG. to hold. Then, along with the copying operation, the electromagnet 50b is energized, and the ejected paper 1
- When the relay 50 is moved from the second set position to the first set position, the power to the electromagnet 50b is cut off.

In this way, the holding means for holding the transfer sheet on the paper discharge tray when carrying out the present invention may be configured to restrict the movement of the transfer sheets 1 to 1 on the paper discharge tray. However, when the transfer sheet is pressed by a contact sensor, the clamping pressure can be obtained arbitrarily by setting the threshold value of the contact pressure.

Further, although the control means for controlling the driving means for the paper discharge tray and the holding means for holding the transfer sheet in the above embodiment are controlled by a microcomputer, when implementing the present invention, each sensor Alternatively, each key may be driven and controlled manually by an independent circuit.

[Effects of the Invention] As described above, the copying machine paper ejecting device of the present invention has a first setting position where the projected area of the plane protruding from the copying machine main body side is small and a first setting position where the projected area of the plane protruding from the copying machine main body side is a paper ejection tray whose set stop position is a second setting position with a larger projected area; a driving means for displacing the position of the paper ejection tray between the first setting position and the second setting position; When the position of the paper tray is displaced from the second setting position to the first setting position, a holding means for holding the transfer sheet on the paper ejection tray, and the paper ejection! - A control means for controlling the driving of the sheet driving means and the holding means for holding the transfer sheet.

Therefore, in normal usage conditions, only when the copying machine is in the copying operation state, the paper ejection tray is set to the second setting position where the projected area of the plane protruding from the copying machine main body side is increased;
When the copying operation of the copying machine is finished, it can be returned to the first setting position in the normal state, and even if the paper ejection tray is disposed above the paper feed cassette, there is no need to replace the paper feed cassette or manually feed the paper feed cassette. Does not get in the way when using the tray.

In addition, when the position of the paper output tray moves from the second setting position to the first setting position, if the transfer sheet remains on the paper output tray, the holding means will hold the transfer sheet on the paper output tray. Since the transfer sheet is held so that it does not move and is displaced to the first setting position, the copied and discharged transfer sheets 1 to 1 do not slide into the copying machine main body from the top surface of the discharged sheets 1 to ray. This prevents paper jams in the copying machine main body or near the discharge port of the copying machine main body.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a mechanical structure of a part of a paper discharging device of a copying machine according to an embodiment of the present invention, and FIG. 2 is a main body of a copying machine and its paper discharging device according to an embodiment of the present invention. FIG. 3 is an explanatory diagram of the first setting position for explaining the operation of the mechanical structure of the paper ejecting device of the copying machine of the embodiment shown in FIG. 1, and FIG. FIG. 1 is an explanatory view of the second setting position to explain the operation of the mechanical structure of the paper ejection device of the copying machine according to the embodiment, and FIG. 5 is the operation panel on the top surface of the copying machine main body shown in FIG. 2. FIG. 6 is a circuit diagram of a control means used in a paper ejecting device of a copying machine according to an embodiment of the present invention, and FIGS. FIG. 19 is a flowchart of a program for controlling a paper device, and is a perspective view of a main part of a paper discharge tray of a paper discharge device of a copying machine according to another embodiment of the present invention. In the figure, 20a: lower paper feed cassette, 20b: upper paper feed power cellars 1 to . 20G: manual guide, 50; paper output tray 55
: Tray setting motor, 56: Evacuation position sensor, 57: Fixed position sensor, 61
: holding member, 62: contact sensor, 66: paper holding motor. In addition, in the drawings, the same reference numerals and the same symbols indicate the same or equivalent parts. Figure 8 1! 110 mouths 9I2I \-(to) α) Figure 17 Figure 18

Claims (1)

[Claims] (1) A first setting position where the projected area of the plane protruding from the copying machine main body side is small and a second setting position where the projected area of the plane protruding from the copying machine main body side is large are the setting stop positions. a paper tray; a drive means for displacing the position of the paper ejection tray between the first setting position and the second setting position; and a driving means for displacing the position of the paper ejection tray from the second setting position to the first setting position. When the transfer sheet is displaced, the transfer sheet includes a holding means for holding the transfer sheet on the paper discharge tray, and a control means for controlling driving of the drive means for the paper discharge tray and the holding means for holding the transfer sheet. Paper ejection device for copying machines.