JPS63280269A - Copying device - Google Patents

Abstract

PURPOSE:To previously prevent the generation of miscopying by accepting only copying paper set up vertically at the time of selecting a two-original feeding mode, and when the copying paper is horizontally set up, automatically switching the selection of copying paper so as to select vertically set copying paper. CONSTITUTION:The titled copying device is provided with a means for selecting the two-original feeding mode, means SW1-SW4, SW6-SW9 for detecting the size of copying paper loaded to paper feeding parts 30, 35, a means for selecting copying paper to be used for copying, and a control means for accepting the two-original feeding mode only when the copying paper set up vertically is selected out of the one set up in the paper feeding parts 30, 35 and automatically switching the device so as to select the vertically set copying paper when the copying paper set up horizontally is selected. Consequently, the generation of a trouble carelessly executing miscopying having no image can be previously prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying apparatus equipped with an automatic document conveying device capable of feeding, stopping, and ejecting documents onto a platen.

The technique and its b.

In recent years, automatic document feeders (hereinafter referred to as ADF) have been developed to reduce the time required to exchange originals among the time required for copying and to eliminate the troublesome task of exchanging originals.
Various types of copying machines have been developed and put into practical use. If this type of ADF is a way to reduce the indirect costs (time and effort) related to copying, the direct costs (consumables such as copy paper and toner) can be reduced by converting two originals into one copy paper on both sides. There are methods such as double-sided copying, in which two originals are copied onto one side of copy paper the size of one original (two-original single-sided copying), and the like. In the former case, double-sided copying requires only one sheet of copy paper, but requires two sheets of toner. On the other hand, the latter one-sided copying of a 2jX document is economical since it requires only one sheet of copy paper and toner. Furthermore, if we combine both, we get 4
It is possible to copy one sheet of original onto both sides of one sheet of copy paper.
Extremely economical.

By the way, various ADFs that have been provided so far are
The originals are transported one by one onto six glass plates (platens), and in order to make single-sided copies of two originals, the operator must line up each original on the platen glass, which does not improve the amount of time and effort required. .

As a measure to improve these issues, ADFs that can feed two originals in parallel in the transport direction onto the document table glass are proposed, for example, in Japanese Patent Application Laid-open No. 60-2942, No. 60-84945, and No. 60-8494. It is disclosed in Japanese Patent No. 93462.

However, copying machines equipped with these ADFs have the following problems in relation to the sizes of copy sheets that can be selected at the same time when the two-sheet feeding mode for originals is selected.

In other words, when executing the two-sheet feed mode, the copy paper fed from the paper feed section of the copying machine main body is, for example, an A4 or BS size short piece of paper set in the transport direction. Therefore, regardless of the size of the two originals conveyed onto the original platen glass, the copying magnification must be set so that the images of the two juxtaposed originals can fit perfectly on the copy paper that is being fed horizontally. This is impossible, and if the copying operation is performed as it is, the image will be cut off and a mistake will be made.

In order to solve the problem of more than one stage for solving the gap, the copying apparatus according to the present invention (i) places the two originals sent and taken out from the EX original feeding section at a predetermined position on the platen. A copying machine equipped with an automatic document feeder that is juxtaposed and stopped in the conveyance direction and capable of ejecting documents from a platen after completion of exposure operation, wherein (i) a two-sheet feed mode for documents is selected; means and (i)
means for detecting the size of copy paper loaded in the paper feed section of the copying device; means for selecting copy paper to be used for copying;
) When the 2-sheet feed mode has been selected, the 2-sheet feed mode will be accepted only if the copy paper loaded vertically among the copy sheets loaded in the paper feed section is selected; The present invention is characterized by comprising: control means for automatically switching to select copy paper loaded vertically when copy paper loaded in the machine is selected.

In configurations of 1-month or more, when 2-sheet feeding mode is selected,
If the copy sheet selected at that time is one that is to be passed lengthwise, execution in the two-sheet feed mode is accepted. on the other hand,
If the selected copy paper is for horizontal threading, the copy paper selected for vertical threading is automatically switched to be selected.

This prevents the risk of inadvertently performing a copy with a cut-off image, thereby improving usability.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a copying apparatus according to the present invention will be described below with reference to the accompanying drawings.

[Schematic configuration and operation of copying machine] In Fig. 1, the copying machine main body (1) is installed on the paper refeed path box (60), the paper feed section is on the left, and the duplex/combining unit (70) is on the right. ) and a sorter (90) are installed.

A photoreceptor drum (10
) is installed so that it can be rotated in the direction of arrow (a) at a constant circumferential speed (V). Around this photoreceptor drum (10), there is a main eraser (11) and a charger (12).
), sub-eraser (13), magnetic brush developing device (
14), transfer charger (Is), sheet separation charger (16), blade type cleaning device (17)
are arranged sequentially. The photosensitive drum (10) has a well-known photosensitive layer on its surface, and as it rotates in the direction of arrow (a), a main eraser (11
), the charger (12) and the sub-eraser (13) remove static electricity, charges, and unnecessary parts, and the optical system (20)
The electrostatic latent image formed on the surface is converted into a toner image by a developing device (14).

The optical system (20) is installed below the document table glass (19) so that the document image can be scanned, and the exposure lamp (21)
, first mirror (22), second mirror (23), third mirror (24), projection lens (25), fourth mirror (26)
It is composed of. The exposure lamp (21) and the first mirror (22) are integrated into a block, and the peripheral speed (V) of the photoreceptor drum (10) (constant regardless of the magnification or variable magnification)
arrow (b) at a speed of (v/m2m is the copying magnification)
It is possible to move in the direction. The second mirror (23) and the third mirror (24) are integrally blocked, (V/2m)
It is possible to move in the direction of arrow (b) at a speed of . Note that when changing the copy magnification, the lens (25) moves on the optical axis, and the fourth mirror (26) moves and swings to correct the optical path.

Copy paper is stored in a fixed automatic paper feed cassette (30) and a removable automatic paper feed cassette (35) provided on the left side of the copying machine main body (1).
31) and (36) are selectively rotated to feed sheets one by one. Further, the upper surface of the cassette (30) is a manual paper feeding section (32) from which copy sheets can be fed one by one. The copy paper fed from the cassette (30) and its manual paper feed section (32) passes through a pair of conveyance rollers (33) and a pair of timing rollers (4).
The copy sheet fed from the cassette (35) is directly conveyed to the timing roller (40), where it is temporarily put on standby. Timing roller (40) for copy paper
The image formed on the surface of the photoreceptor drum (10) is completely sent to the transfer section in synchronization with the image formed on the surface of the photoreceptor drum (10).
0), the toner image is transferred by the corona discharge of the transfer charger (15), and the toner image is separated from the photoconductor drum (10) by the alternating current corona discharge of the separation charger (16) and the strength of the sheet itself. Ru. Thereafter, the copy paper is sucked onto a conveyor belt (41) equipped with an air suction means (42) and sent to a fixing device (43), where the toner image is fixed, and then discharged from a pair of discharge rollers (44). be done.

On the other hand, the toner and charge remaining on the surface of the photosensitive drum (10) after the transfer are removed by a cleaning device (17) and a main eraser (11), and the photosensitive drum (10) is ready for the next copying process.

[Detection of copy paper size] Micro switches (SWI') to (SW
4).

(SW5), (SW6) to (S-Tough), and (S-Ken 10) are installed.

SW7 f (SWI) ~ (SW4), (SW6) ~
(SW9) is turned on and off in accordance with the position of the copy paper width direction regulating plate, etc., and based on the 4-bit hood corresponding to the combination of on and off, the cassette (35) and (30)
) is perpendicular to the copy paper size and paper feed direction set in the machine.

Detects which direction it is installed horizontally.

The sizes that can be copied with this copying machine, that is, the sizes of copy sheets that can be set in each cassette (30) and (35), are, for example, [A3], [A4], [A5], and [A6].

[B11. [B11. [B6], [A4], [A
5].

[For B11, vertical or horizontal can be selected. Further, the switches (SWI) to (SW4) also detect attachment and detachment of the cassette (35). Table 1 below shows an example of a food table using switches (SWI) to (SW4).
In this table 1, "0" indicates the switch is on, and "0" indicates the switch is off.
1'', and when all the switches are off, it means that the cassette (35) is not installed in the paper feed section. In addition, Ima-group switches (6) ~ (S
W9) also performs similar detection.

Also, a micro switch (SW5) is provided in each paper feed section.

(SWIO) are respectively power (! y to (35),
The presence or absence of copy paper in (30) is directly detected.

[Gold and white below] [Table 1] [Mechanism and sheet feeding for double-sided/composite copying] The duplex/composite unit (70) generally consists of a first switching claw (71), a second
switching claw (72) and ejection roller (73).

(74), conveyance rollers (75), (76), guide plates located around them and forming a conveyance path, and a paper refeeding device (80).
A sorter (90) equipped with 1) is installed.

The paper refeeding device (80) is a removable paper refeeding cassette (81).
), which has a pickup roller (85) that can be used both for storing and refeeding sheets, a storage roller (86) that contacts and rotates driven by the roller (85), a feeding roller (87),
It is equipped with a Sabaki roller (88). Re-feed cassette (
81) is a bottom plate (82a) that can rotate around the rear end (82a).
82), and the bottom plate (82) is rotatable from the dotted line position to the solid line position by a push-up mechanism (not shown).

The paper refeeding path box (60) has a conveyor roller pair (61)
.

(62), (63) and guide plates located around them to form a seat passage. The sheet that has been completely fed out from the unit (70) is conveyed by a pair of conveying rollers (61), (62), and (63), and is then conveyed through the guide plates (4g) and (49> of the copying machine main body (1). The conveyance can be completed up to the timing roller pair (40).

Paper passing modes in the duplex/combining unit (70) include a discharge mode, a duplex copying mode, and a composite copying mode, and the paper passing mode in each mode is a switching claw (71).

It can be changed by switching the position of (72).

That is, in the ejection mode, the switching claw (71) is fully set to the dotted line position in FIG. 1, and the copy paper is ejected to the sorter bin (91).
(72) is set to the solid line position, and the single-sided copy paper is fed into the paper refeed cassette (81) as described above.6 In the composite copy mode, the switching claw (72) is fully set to the dotted line position, and the single-sided copy sheet is fed into the paper refeed cassette (81). The copy paper that has been copied is immediately conveyed to the paper refeed path box (60).

[Automatic document feeder (ADF) configuration and operation code A D
F (100) is generally a document feeding section (110);
It is composed of a document transport section (12G) and a document discharge section (130), and can be opened upward as a whole with the back as a fulcrum. Therefore, as shown in Fig. 1, this A D F (100) is set on the document platen glass (19), and the document is read one by one or two documents in succession as explained below. In addition to automatically transporting the document and setting it in a predetermined position on the document glass (19), the operator can lift the document upward and place it on the document glass (19) to perform copying. . The opening and closing of the ADF (100) is detected by a switch (PSW) (see Figure 7), and this detection signal activates the ADF (100) and the copying machine body (1).
and controls are associated with each other.

The document feeding unit (110) includes a document tray (111), a pickup roller (112), and a forward rotating unit for handling documents.

A roller (113), a reversing roller (114), a feeding motor (not shown) that drives each roller (112), (113), and (114), and a document detection sensor (SEL).
). The document tray (111) has a slide plate (not shown) that positions the document in the width direction. ! The document is set on the document tray (111) with the image side facing down, and this state is detected by a sensor (SE1).

The pickup roller (112) is movable up and down, and is normally waiting at the top. The original is in the original tray (111)
When the sensor (SEl) is turned on and the ADF start switch (SSW) (see Figure 7) is turned on by the operator, the pickup roller (112) descends and presses against the top surface of the document, and , feeds the top layer original by rotating.

The forward rotation roller (113) rotates in the document feeding direction, and the reverse rotation roller (113) rotates in the document feeding direction.
114) can be rotationally driven in the document return direction, and as mentioned above, together with the pickup roller (112), both rollers (
113) (114>(114>) is rotationally driven, and only the upper original is sent to the original transport unit (120) by the rotation of the forward rotation roller (113), and the lower original is sent to the original transport unit (120) by the rotation of the reverse rotation roller (114). The document is returned to the document tray (111) by rotation.

The document transport section (120) has pinch rollers (121), (
122) and its drive motor (123) (see FIG. 2), a conveyor belt (125) and its drive motor (not shown), and a document detection sensor (SEA) and (SE3).

The conveyor belt (125) has support rollers (126a), (
126b) in an endless manner, and the pushing nine rollers (
127) in contact with the original platen glass (19),
It can be driven forward and backward in the direction of arrow (C).

That is, when the sensor (SE2) detects the leading edge of the document sent out from the document feeding section (11G), the rotation of the pickup roller (112), forward/reverse rollers (113), and (114) starts with a slight delay. The document is stopped, and the leading edge of the document contacts the nip portion of the pinch rollers (121) and (122), forming a loop on the upstream side thereof. With this,
The skew of the original can be corrected.

Kira, the original is pinch roller (121), (122)
The document is conveyed onto the document table glass (19) by the rotation of the document and the normal rotation of the conveyor belt (125) in the direction of arrow (C). *Stopping of the document is controlled by setting a timer when the trailing edge of the document is detected by the sensor (SE2), and stopping normal rotation of the conveyor belt (125) when the timer expires. With this, the original is stopped at a predetermined position on the original platen glass (19).

Here, from A D F (100) to the copying machine body (1)
A copying operation start signal is output to the copying machine main body (1).
The copy operation starts. and the optical system (20)
When image exposure scanning for the set number of sheets is completed, a document exchange signal is output from the copying machine main body (1) to the ADF (Zoo). At this signal, the conveyor belt (125
) is driven forward in the direction of arrow (c), and the originals are completely ejected.

By the way, as shown in Fig. 2, the length of the original is determined by the disc (1) fixed to the spindle (121a) of the pinch roller (121).
The output of the sensor (5E5) is measured by the pulse signal from the sensor (SE5) based on the rotation of the sensor (SE2) and the pinch roller (SE2) that detects the passage of the document.
121) and is input to the second microcomputer (202) (see FIG. 7), and by counting the number of pulses while the document passes the sensor (SE2), Obtaining document length signal.

Further, the width of the document is detected and classified by the sensor (SE3). In this example, this sensor (SE3) is [A
4], [BS] is detected (on) when the document is fed horizontally, and is not detected (off) when the document is fed vertically. As a result, [A4], [A5], and [B
You can clearly identify the size of 4 pieces, [B6], etc., and whether it is vertical or horizontal.

The document ejection section (130) has ejection rollers (131), (1
32) and (133), (134), the surrounding guide plate, the discharge tray (135), and each roller (131) to
(134) drive motor (I5g not shown) and a document detection sensor (SEA).

When the optical system (20) completes image exposure scanning for the number of copies and a document exchange signal is output from the copying machine main body (1), the conveyor belt (125) is driven to rotate in the normal direction, and
The rollers (131) to (134) are driven to rotate, and the original is ejected from the original platen glass (19) to the ejection tray (taS).The original ejection operation is based on the original trailing edge detection signal from the sensor (SEA). After a certain period of time, that is, when all documents are accommodated on the discharge tray (135), the operation is stopped.

Furthermore, when the document trailing edge detection signal from the sensor (SEA) is generated, the presence or absence of the document on the document tray (111) is determined based on the signal from the sensor (SEI), and if the document is fully set, then the Repeat the document feeding, stopping, and ejecting operations.

[Operation in 2-sheet original feeding mode] In this embodiment, A D F (100) feeds 1 original.
Place the sheets one by one in the specified position on the document table glass (19),
In addition to the normal single-sheet feeding mode that ejects the exposure scanning diameter of the image, two originals are successively fed onto the original platen glass (19) and set in series at a predetermined position.
It is possible to select a two-sheet feed mode in which the image is ejected after exposure scanning is completed.

(+) Original Feeding Operation The original feeding operation when the two-sheet feeding mode is selected will be described below with reference to FIGS. 3a to 31.

The 2-sheet feed mode is selected, and the ADF start switch (
When SSW) is turned on, the originals stacked on the original tray (111), even the top layer original (Dl), are fed by the rotation of the pickup roller (112), and as described above, the originals stacked on the original tray (111) are fed by the forward/reverse rollers (113). , (114), and is sent out from the feeding section (110) (see Fig. 3a).

The leading edge of the first document (pl) sent out in this way contacts the nip portion of the pinch rollers (121) and (122), and forms a loop on the upstream side thereof (see Figure 3b).
.

Hereinafter, this process will be referred to as tip resist process.

Next, the pinch rollers (121) and (122) are driven to rotate, and the conveyor belt (125) is driven to rotate forward in the direction of arrow (c), so that the original is transferred to the original platen glass (19).
) (see Figure 3c).

After that, the rear end of the document (Dl) is moved to the pinch roller (121).
.

(122>, the pinch roller (121),
(122) and the rotation of the conveyor belt (125) is stopped (see Figure 3d).

Next, the conveyor belt (125) is reversely driven in the direction of arrow (C'), and the rear end of the document (Dl) is moved to the pinch roller (121).
.

Stop it in contact with the nip part of (122) (
(see FIG. 3e), hereinafter this process will be referred to as trailing edge registration process.

While the first document (Dl) has been processed with trailing edge registration, the second document (D2) is transferred from the document tray (111).
), perform the edge registration process (see Figure 3g), and then process the two originals (see Figure 3g).
I), (D2) are pinch rollers (121), (122
), they are continuously arranged side by side with their rear ends and tips registered.

In this state, the pinch rollers (121), (122) and the conveyor belt (125) are driven in normal rotation, and the original (Di),
(D2) onto the document glass (19) at the same time (see Figure 3h), the rear end of the second document (D2) is at a predetermined position on the document glass (19), that is, the optical system ( 20)
When the exposure start position is reached, the pinch roller (121
), (122) and the rotational drive of the conveyor belt (125) are stopped (see FIG. 31). With this, two manuscripts (
DI) and (D2) are set at a predetermined position on the document platen glass (19) in a state where they are successively lined up in series in the conveying direction.

(i) In the two-sheet feed mode, which is more than the original ejection operation, the two originals are placed side by side without any gaps, so if the second original is ejected in this state, the leading edge of the second original will be the same as the first. You will have to push the rear end,
There is a possibility that the alignment or page alignment on the output tray (135) may be disturbed.

- Therefore, in the two-sheet feed mode, two originals are ejected onto the ejection tray (135) with an interval between them to ensure alignment of the originals on the ejection tray (135). There are two methods for such document ejection processing.

In the first document ejection process, the first document is
31) After reaching the bar 132), the conveyor belt (125)
stop normal rotation, and place the second document on the document table glass (19).
) (125) is placed on standby and an appropriate distance is left between them, and then the conveyor belt (125) is rotated in the normal direction again.

Specifically, in response to the original exchange signal, the transport bell (25) is driven in normal rotation, and the ejection rollers (131) to (134) are driven to rotate in the normal direction.
(see Figure 4a). With this, the manuscript (D
i), (D2) begins to be ejected in the direction of arrow (c),
When the leading edge of the first document (Dl) is detected by the sensor (SE4), the forward rotation of the conveyor belt (125) is stopped (see Figure 4b). From this state, the first document (Dl) is Dl
) is then conveyed by the discharge rollers (131) to (134), and the second document (D2) is transferred to the document table glass (19).
), and a gap is left between them (the fourth
(See Figures c and 4d).

When the rear end of the first document (Dl) is detected by the sensor (SE4), the conveyor belt (125) is driven forward again (see Figure 4c), and the two documents (DI), ( D2) are discharged onto the discharge tray (135) at appropriate intervals.

On the other hand, the second document ejection process is carried out by the ejection roller (131)
(134) The document transport speed is determined by the transport belt (125).
In this method, the document conveyance speed is set higher than the original document conveyance speed, and an appropriate distance is left between two documents.

Specifically, the transport belt (125) is driven to rotate in the normal direction based on the document ejection signal, and the ejection rollers (131) to (134)
) (see FIG. 5a). At this time, the document conveyance speed by the discharge rollers (131) to (134) is set to be higher than the document conveyance speed by the conveyor belt (125). As a result, the distance between the originals (Di) and (D2) gradually increases (see Figures 5b and 5C), resulting in 2
The sheets of originals (DI) and (D2) are ejected onto the ejection tray (135) at appropriate intervals.

Note that the upstream ejection rollers (131) and (132) may be set to the same document transport speed as the transport belt (125). In this case, the ejection rollers (131) and (132)
132) is a discharge roller (133) with a high conveyance speed;
When the document is conveyed in step (134), it is configured to rotate as a result of the conveyance of the document.

[1 broadcast when 2-sheet feeding mode is selected] By the way, when the above 2-sheet feeding mode is selected, if the total number of original sheets is an odd number, two sheets will be fed as a set. Eventually, only one manuscript will exist. Therefore, when one final document is fed and the sensor (SE1) outputs a document empty signal, the final document is processed in the single sheet feeding mode.

[Automatic optimum magnification setting function (AMS)] Next, with this copier, when the operator specifies the copy paper size and original size, the original image can be printed on the copy paper of the selected size without any image loss. It has an automatic optimum magnification setting function (hereinafter referred to as AMS) that automatically sets the optimum copy magnification to be formed.

When this AMS mode is selected, the second CPU (202
), the manuscript size is determined and hooded, and the first ICP
It is sent to U (201). 1st CPU (201
) calculates the optimum copy magnification from the document size hood and the size hood of the copy paper set in the cassettes (30) and (35) selected by the operator, and the calculated copy magnification is based on the specifications of the copier. If it is within the range, set the copy magnification. On the other hand, if it is outside the specifications, the operator is warned that it is impossible to set the optimum copy magnification and is prompted to manually set the copy magnification.

Table 2 below shows the original size and copy paper size in the AMS mode in the normal copying mode where originals are transported one by one, and calculations based on them.

This shows the relationship with the set copy magnification.

[Automatic optimum copy paper size setting function (APS)] In addition, this copying machine can print copies of the original image in a size that can be formed without image cut-off when the operator specifies w, loss size, and copy magnification. The company offers an automatic optimum copy paper size setting function (hereinafter referred to as APS) that automatically selects the paper feed cassette in which paper is set.

When this APS mode is selected, the second CPU (202
), the document size is determined and hooded, and the first CP
It is sent to U (201). 1st CPU (201)
calculates the optimal copy paper size from the original size code and the copy magnification selected by the operator, and selects the paper feed section, i.e., the cassette (
30) and (35). On the other hand, which cassette (30) contains copy paper of the calculated size?

(35), or if the copy paper is outside the specifications of this copier, the operator is warned that the optimum size copy paper does not exist, and the operator is warned to manually select the paper source or manually select the copy magnification. prompts you to reconfigure.

Table 3 below shows the relationship between the document size, copy magnification, and copy paper size calculated and set based on these in the APS mode in the normal copy mode in which documents are conveyed one by one.

[Margins below] [Relationship between original 9x magnification and copy paper in 2-sheet feed mode] A
When operating the D F (100) in two-sheet feeding mode and copying two original images on one side of one copy paper, the original size, copy magnification, and copy paper size have the following relationship6.For example: , when two sheets of A4 horizontally threaded originals are transported, if the copy magnification is [1, Goo], by selecting A3 as the copy paper, the original images for two A4 sheets of horizontally threading will be superimposed on the A3 copy paper. It fits perfectly. Also, the copy magnification is [0,707
], by selecting A4 lengthwise as copy paper, the original image will fit in just the right amount. On the other hand, if A3 copy paper is selected for two sheets of A4 side-by-side originals, the copy magnification is set to [1,
000], and if A4 vertical copy paper is selected, if the copy magnification is set to [0,707],
Similar to the above, it is possible to fit the original images of two A4 sheets of paper on one sheet of copy paper without any excess or deficiency.

Therefore, by using A D F (100) and copying in two-sheet feed mode, it is possible to create two original images on one sheet of copy paper, saving time on copy paper and copying time. Leads to savings. Furthermore, if the double-sided copy mode is used in combination, original images for four sheets can be created on the front and back sides of one sheet of copy paper. Furthermore, if the copying machine body (1) is equipped with a book division function, that is, a function that exposes and scans the image of a book document one side at a time, it is possible to use the two-sheet feed mode, book division function mode, and double-sided copy mode together. , it is possible to form images of two originals on the front and back sides of one sheet of copy paper. These copying modes further save copying paper and copying time.

[Operation panel] In Fig. 6, the operation panel (15) of the copying machine main body (1) is
0) is equipped with keys, display means, etc., which will be explained below. Each key has an internal switch that is turned on by pressing it.

(151) is a print key for starting the copying operation, and (152) is a numeric keypad for entering numbers such as the number of copies. (153) is a clear/stop key that serves as a stop key for canceling multi-copy in the middle and for clearing the set number, and (154) is an interrupt key for executing interrupt copy.

For (155), the copy mode is normal copy, double-sided copy.

A copy mode switching key (156) is used to switch to either composite copying, a magnification selection key (156) is used to set the copy magnification to a preset magnification or an arbitrary magnification, and (157) is used to select the copy paper size. The copy paper selection key (158) is the AMS.

A document size detection mode selection key (159) is used to select either APS or manual mode, and a feeding mode selection key (159) is used to select the document feeding mode from one-sheet feeding to two-sheet feeding.

The operation panel (150) further includes display means described below.

(160) is a 4-digit display segment that displays the number of copies, etc.; (161) is a 4-digit display segment that displays the manually set copy magnification; (162) to (
165) is the LED that displays the preset copy magnification, (166) is the normal copy, (167) is the double-sided copy, and <168) is the L that displays the composite copy.
E D, (169) is the LE that displays the copy paper size.
D, (170) is AMS mode, (171') is AP
S mode, (172) indicates manual mode, (173) indicates single sheet feed mode, (
174) is an LED that displays the two-sheet feed mode, and these various LEDs are associated with the corresponding keys (155) to (159).
) is rotated each time the switch is turned on.

[Control circuit Figure 7 shows the first CPU (20
1) and a second CPU that controls A D F (100)
The input/output configuration of (202) is shown, and the CPU (201),
(202) are connected together for synchronization.

The input/output board of the first CPU (201) includes various key switches (151) to (1) on the operation panel (150).
159), microswitch (SW) installed in the paper feed section
Switch matrix (20) including I) ~ (SWIO) etc.
3) is connected, and this switch matrix (20
3) and the display segment (1) via the decoder (205).
60), a matrix (204>) consisting of display LEDs
is connected. Further, the output boat outputs on/off signals to the main motor, developing motor, etc. in the copying machine main body (1). The main motor pulse signal can be input to the terminal (B1).

The input port of the second CPU (202) has an A D
F (100) open/close detection switch (PSW),
A D F start switch (5SW), sensors (SEI) to (SE4) that detect the conveyance of the document, and a sensor (5E) that detects the rotation of the pinch roller motor (123).
5) is connected. The output boat has a pickup roller (112), a forward/reverse roller (113), and a (1
14), a transport motor that drives the transport belt (125), a solenoid that moves the pickup roller (112) up and down, and discharge rollers (131) to (1).
34) is connected to the ejection motor that drives the motor. A pulse signal of the transport motor is input to the terminal (B2).

In addition, a clock terminal (SCK) for data sampling and output of the first CPU (201), and an interrupt output terminal (
PCO), data output terminal (500 pins) and data input terminal (SIN) are the clock input terminal (SCK) and interrupt input terminal (INT) of the second CPU (202).
, data input terminal (SIN) and data output terminal (So
uT).

[Control Procedure] Hereinafter, the control procedure of this embodiment will be described in detail with reference to FIGS. 8 to 19.

FIG. 8 shows the first CPU (20
1) shows the main routine.

When the first cPU (201) is reset and the program starts, first, in step (Sl), the internal RA
Clears M, initializes various registers, etc., and performs initial settings to put each device into the initial mode.

Here, the flags used in the following routine will be explained in advance.

Copy flag (FO): This flag is used to indicate that the copying machine is in operation, and is set r1. is set to

Mode flag (Fl): This is to indicate the document feeding mode in ADF (100).It is set with the feeding mode selection key (159), and when it is '0', it indicates the single sheet feeding mode, and ' 1” indicates two-sheet feeding mode.

Feed plug (F2): This is to indicate the number of originals actually fed onto the document table glass (19) at A D F (100). When it is "0", it indicates one sheet. , "1" indicates two sheets; even if the two-sheet feeding mode is selected, if the total number of originals is an odd number, it will be "0" when the final original is transported; The top flag (F2) is set by the feed number signal from the second CPU (202).

Returning to the routine, in step (S2) the first CPU (2
01') main timer is set. This main timer determines the time required for one routine of this main routine, and its value is set in advance in step (Sl).

Next, the subroutines shown in steps (S3) to (S5) are sequentially called. Step (S3) is a subroutine for manual key processing, including input processing from the numeric keypad (152),
The process of storing the copy paper size set in the cassettes (30) and (35) in the internal RAM, the process of setting the copy mode using the copy mode switching key (155), and the process of setting the magnification using the magnification selection key '<156). Execute. Step (S4) is a subroutine for document feed mode switching processing, in which A is pressed by the feed mode selection key (159).
DF (100) executes the document feed mode setting process. Step (S5) is a subroutine for copy start processing, which processes the start of a copy operation.

Next, in step (S6), the copy flag (FO) is set to “1”.
”, and if it has been reset to ``0'', the process moves to step (S8), and if it has been set to ``1'', a copy processing subroutine for performing the actual copying operation is executed in step (S7). Execute and move to step (S8). In step (S8), data transmission and reception with the second CPU (202) is processed. The signals communicated in this step (S8) include the following signals sent from the first CPU (201) to the second CPU (202):
There is a copying operation signal, a document feed mode signal, and a document exchange signal when image exposure scanning for a set number of sheets is completed. Second
CPU (202) to first CPU (201)
The signals sent to the
A signal that is set to "1" when an original is loaded into the original tray (111) while o) is not in operation, and reset to r□ when the last original is ejected.

Set completion signal 2 A signal output when the original is conveyed and stopped at a predetermined position on the original platen glass (19).

Original size signal: A D F (100) sensor (
SE3).

Food signal of document size detected in (SE5).

Feed number signal: A signal indicating the number of originals actually fed onto the original platen glass (19).

Prohibition signal: A signal that can be output when the size of the fed document is inappropriate for copying.

When the processing in each of the above subroutines is completed, the process waits for the main timer to finish counting in step (S9), and then returns to step (S2). The time length of this one routine is used to count the various timers that appear in each subroutine, that is, the end of counting for each of the various timers is determined based on how many times this one routine has been repeated.

FIG. 9 shows a subroutine for document feeding mode switching processing executed in step (S4) of the main routine.

First, in step (510) the copy flag (FO) is set to "
If it is set to 1, that is, if copying is in progress, the process returns to the main routine.

If it has been reset to 0., it is determined in step (511) whether the feed mode selection switch (159) is on-edge or not. If it is not on-edge, the process returns to the main routine, and if it is on-edge, the mode It is determined whether the flag (Fl) is "0". If the mode flag (Fl) is reset to "0", that is, if the single sheet feeding mode is set at this point, then step <
In step 513), the mode flag (Fl) is set to 11'', that is, the two-sheet feed mode is set, and the process moves to step (515). On the other hand, in step (512) the mode flag (F
If it is determined that the flag (Fl) is set to rl, the mode flag (Fl) is reset to "rO" in step (514>), that is, the one-sheet feeding mode is set, and the process returns to the main routine.

In step (515), each cassette (30), (35
) is loaded vertically. If there is a copy paper loaded in the l# thread, that copy paper is selected in step <518), the process returns to the main routine, and a copying operation is executed in the two-sheet feeding mode. If there is no copy paper loaded vertically, in other words, if copy paper is loaded horizontally in the cassettes (30) and (35), a prohibition signal is output in step (516) and the second Prohibits document feeding operation in sheet feeding mode and steps (
517) indicates that there is no copy paper loaded vertically.
For example, the display segment (160) is displayed, and the process returns to the main routine. In the two-sheet feed mode, the original image becomes longer in the vertical direction (image scanning direction), making it unsuitable for horizontally threaded copy paper.

Therefore, when the two-sheet feeding mode is selected, if the copy paper loaded in the vertical thread is selected, the process will be executed as is, and even if the copy paper loaded in the horizontal thread is selected, the process will be executed as is. You can simply switch to select copy paper and proceed with the process. However, when only side-passing copy paper is loaded, the document feeding operation in the two-sheet feed mode and the subsequent copying operation are prohibited, and a message to that effect is displayed. In addition, if the two-sheet feed mode is prohibited, the operator can reload the copy paper vertically according to the display to that effect, select the two-sheet feed mode again, and start the copying operation. It is possible.

FIG. 10 shows a subroutine for copy start processing executed in step (S5) of the main routine.

*-, the ADF mode signal is rl in step (520)
”, and if it is set to ``1'', that is, if copying using A D F (100) is selected [see step (5123)], step (5
In step 21), it is determined whether or not a document prohibition signal is output. If the document prohibition signal has not been output, it is determined in step (522) whether or not a set completion signal has been output. If this set completion signal is not output, it will remain on standby, and if it is output, that is, when the document is set at a predetermined position on the document platen glass (19), [step (stoo)>.

(5212)], and the copy plug (FO) is set to "1" in step (525).

On the other hand, if it is determined in step (521) that the document prohibition signal is output, [see step (5206) M]
In step (526), a prohibition display is output to prohibit the start of the copying operation.

In the step (520), the ADF mode signal is r OJ
If it is determined that the
After confirming that the copy flag (FO) has been reset to r□ in step 3'), it is determined in step (524) whether or not the print switch (151) is on-edge.

If the print switch (151) is turned on, the copy flag (FO) is set to r in step <525).
Set to l.

As described above, when the copy flag (FO) is completely set to ``1'', the copying process in step (S8) is started.The control of the copying process is well known, and its explanation will be omitted.

Figure 11 shows the second CP that controls A D F (100).
The main routine of U (202) is shown.

When the second CPU (202) is reset and the program starts, first, step (5100)
Clears the internal RAM, initializes various registers, etc., and performs initial settings to put each device into the initial mode.

Here, the flags used in the following routine will be explained in advance.

Copy flag (FO), mode flag (Fl), feed flag (F2): The above flags are the same as those used in the control of the first CPU (201).

ADF operation flag (F3): ADF (100
) is in operation, r1. is set to

ADF feeding flag (F4): ADF (100
) is used to indicate that the document is being fed, and is set to "1" from the time the document starts to be fed until it is completely stopped at a predetermined position on the document table glass (19).

Lead edge registration flag (F5), document to tray (111)
) to the leading edge registration position, and the r1. is set to

Tip registration start flag (F6): This is to indicate the timing to start the tip registration process, and is set to 1.
It is set to "1" from the start of feeding the first and second originals until the feeding motor and pickup roller (112) start up.

Wait flag (F7) is used to indicate that the document is waiting at the leading edge registration position, and is set to "1" from the completion of leading edge registration processing until the resumption of feeding onto the document table glass (19). be done.

Set completion flag (F8): This is to indicate that the original fed from the original tray (111) has been set in the specified position on the original platen glass (19), and ejection starts from the completion of feeding. It is set to "1" until then.

Ejection flag (F9): j [Place the manuscript on the platen glass (19
) is used to indicate that the process of discharging from the top to the discharging tray (135) is in progress, and r1. is set to

Original flag (FIO): This is used to indicate whether the original being fed in the two-sheet feeding mode is the first or second sheet. ``0'' indicates that it is the 1st sheet; 1” indicates that it is the second sheet.

Returning to the routine, in step (Slot) the second CPU
(202) Set the main timer. This main timer determines the time required for one routine of this main routine, and its value is set in advance in step (5100).

Next, in step (5102), it is determined whether the mode is ADF mode or not. If NO, the process moves to step (5112), and if YES, steps (5103) to (510)
The subroutines shown in 5) are sequentially called. Step (
5103) detects the on-edge of the ADF start switch <5SW) and executes processing to start the operation of the ADF (100). In step (5104), the original is transferred from the original tray (111) to the pinch roller (121).
, (122) executes the leading edge registration process to send the image to the leading edge registration position. Step (5105) executes a process of detecting the size of the document sent out from the document tray (111).

, Next, in step (5106), the mode flag (Fl)
It is determined whether or not is "1". The mode flag (Fl) is “
o.

If it has been reset, that is, if it is in the single-sheet feeding mode, the subroutines of steps (5107) and (5110) are called, and the process moves to step (5112). Step (5107) executes a process of feeding and setting normal originals one by one onto the original platen glass (19). Step (5110) executes a process of ejecting one document onto the ejection tray (135).

In the step (5106), the mode flag (Fl) is set to “
If it is determined that the original is set at 1°, that is, if the two-sheet feeding mode has been selected, then in the subroutine of step (5108), the originals are fed and set two sheets at a time onto the original platen glass (19). Execute processing. And step (
5109), it is determined whether the feed flag (F2) is "1" or not, and if it has been set to "rl", the step (Sill
) subroutine to output two originals to the output tray (135).
Then, the process moves to step (5112). If the feed flag (F2) is reset to "o", the subroutine of step (5110) is executed and the process moves to step (5112).

In step (5112), data transmission and reception with the first CPU (201) is processed. The signals communicated here are the same as those explained in the process of step (S8).

When the processing in each of the above subroutines is completed, the process waits for the main timer to finish counting in step (5113), and then returns to step (Slot). The time length of one routine is used to count the various timers that appear in each subroutine.

FIG. 12 shows a subroutine for ADF start processing executed in step (5103) of the main routine of the second CPU (202).

First, in step (5120), check whether the copy flag (FO) has been reset to r□.
In step 1), check whether the ADF operation flag (F3) has been reset to 0. In step (5122), check whether the ADF operation flag (F3) is
111) Determine whether the upper sensor (SEI) is on or not. If any of them is NO, return to the main routine immediately; if both are YES, copy operation.

If it is confirmed that the ADF is not operating and that the original is set on the tray (111), step (5)
123) sets the ADF mode signal to "1".

Next, in step (5124), wait for the ADF start switch <5SW) to turn on, and then in step (5125)
) sets the ADF operation flag (F3) to "1", and in step (5126) sets the ADF feeding flag (F4) to "1".
'', and in step (5127), the leading edge registration flag (F5) and the leading edge registration start flag (F6) are set to "1". Next, in step (512B), it is determined whether the mode flag (Fl) is "1" or not.
If it is set to "1", the feed flag (F2) is set to "1" in step (5129), and if it is reset to "0", the feed flag (F2) is reset to "rO" in step (5130). End this subroutine.

FIG. 13 shows a subroutine for edge registration processing executed in step (5104) of the main routine of the 20th PU (202).

First, in step (5140), the tip registration flag (F
5) is "1" or not, and if it is reset to "0", the main routine is returned immediately; if it is set to "rl", the tip registration start flag (F6) is set to "rl" in step (5141). 1”. If this flag (F6) is reset to "O", step (
5144), and if it is set to "rl", the feeding motor and pickup solenoid are turned on in step <5142). With this, the pickup roller (112
) comes into pressure contact with the top surface of the document and rotates, and the forward/reverse rollers (113) and (114) also start rotating, until only one document in the top layer is completely fed out from the tray (111) (see Figure 3a). ), then, in step (5143'), the leading edge registration start flag (F6) is reset to "0", and the process moves to step (5144>).

In step (5144), it is determined whether the sensor (SE2) is on-edge, and if it is not on-edge, step (5144)
146), and if it becomes on-edge, proceed to step (51).
Step 45) sets the tip registration timer, and step (5)
146). This leading edge registration timer is set to the time required until the leading edge of the document completely detected by the sensor (SE2) comes into contact with the nip portion of the pinch rollers (121) and (122) and forms a loop. Therefore, in step (5146), wait for the end of the count of this tip registration timer, then in step (5147>, turn on the feed motor and pickup solenoid), and then in step (514B).
) to reset the tip registration flag (F5) to "o", and in step (5149) set the standby flag (F7) to "1".
, and end this subroutine.

As a result, the leading edge of the document that has been completely fed out of the tray (111) comes into contact with the nip portion of the pinch rollers (121) and (122), corrects the skew, and waits while forming a loop on the upstream side. (See Figure 3b).

The 141110th is the 2nd CPU (202) f)J
by)1. This subroutine shows the document size detection process executed in the -ON step (5105).
9) This is executed while the document is being fed to a predetermined position on the top, and the sensor (SE5) detects the length of the document in the conveyance direction by pulse counting, and turns on and off the sensor (SE3) that detects the width direction. The document size is determined based on the combination.

Here, first, in step (st50), it is determined whether the pinch roller motor (123) has started up.

This pinch roller motor (123) follows the steps below (
5164) to turn it on. If it is not a rising edge, the process moves to step (5152), and if it is a rising edge, the pulse count of the sensor (5E5) is started in step (5151), and the process moves to step (5152). When the off-edge of the sensor (SE2) is confirmed in step (5152), the pulse count of the sensor (SEA) is stopped in step (5153), and the pulse count of the sensor (SEA) is stopped in step (5154).
In step (5155), the document size is calculated using the pulse count number and the on/off signal of the sensor (SE3).
Outputs the original size signal and ends this subroutine.

FIG. 15 shows a subroutine of document feeding process (2) in the single sheet feeding mode, which is executed in step (5107) of the main routine of the second CPU (202).

First, in step (516G)
) is 11", and if it has been reset to "0", it immediately returns to the main routine, and if it has been set to "1.", that is, the ADF start switch (SSW')
When turned on, the standby flag (
F7) is "1" or not. Standby flag (F7)
is reset to I″0″, step (5166
), and if it is set to "rl", that is, if the leading edge of the document is registered with the pinch rollers (121) and (122), the ejection flag (F9) is set to "0" in step (5162). Determine whether or not. Emission flag (F9
) has already been set to "1.", step (516
4), and if it has been reset to "0", turn on the transport motor in step (5163), and then turn on the transport motor in step (516).
In step 4), the pinch roller motor (123) is turned on, and in step (5165), the standby flag (F7) is reset to "0", and the process moves to step (5166). With this, feeding of the document from the leading edge registration position onto the document table glass (19) can be resumed.

In step (5166), it is determined whether the sensor (SE2) is off-edge or not, and if it is not off-edge, step (5166) is performed.
516B), and if it is off-edge, step (516B) is entered.
Step 167) sets the stop timer, and step 5168
). This stop timer is activated when the rear edge of the document is detected (
SE2) until reaching the exposure start position on the document platen glass (19). Therefore, in step (5168), wait for the stop timer to finish counting, and in step (5169), turn off the pinch roller motor (123) and the conveyance motor, and in step (517)
0), the original setting completion signal is sent to the first CPU (201).
, and in step (5171) set the set completion flag (
F8) is set to "1." This means that the original has been fed to a predetermined position on the original platen glass (19) and stopped.

Next, in step (5172), it is determined whether the sensor (SEI) is on or not, and if it is on, that is, if the next document is on the tray (111), the leading edge registration process is performed on that document in advance. To do this, set the tip registration flag (F5) to "1" in step (5173), and then
At step 74), the leading edge registration start flag (F6) is set to "1", and at step (5175), the ADF feeding flag (F4) is reset to "0", and this subroutine is ended. Also, in the step (5172), the sensor (
SEI) is off, i.e. the tray (111)
If there are no more originals, A is sent in step (5175).
The DF feeding flag (F4) is reset to 10'' and this subroutine ends.

Figures 16a and 16b! ! l is the second CPU (2
This subroutine shows the document feeding process ■ in the two-sheet feeding mode that can be executed in step (510g) of the main routine of 02). In this subroutine, the sizes of the first 1yX draft and the second second manuscript are Only when both documents are the same size and are horizontally fed (for example, A4 horizontally or B5 horizontally), the two-sheet feeding process is executed, and when other documents are fed, the copying operation is prohibited. , eject the original.

First, in step (518G>) the ADF feeding flag (F4
) If it has been reset to "rO", it will immediately return to the main routine, and if it has been set to "1", that is, if the ADF start switch (SSW) is turned on, then step (5181) is the original flag (F
IO) is rO''. Manuscript flag (FIG)
) is set to "1", that is, the document to be fed from now on is the second sheet, the process moves to step (5201), and if it is reset to "0", that is, the document to be fed from now on If the document to be processed is the first, step (5182)
It is determined whether the standby flag (F7) is 11. If the standby flag (F7) is reset to ``0'', the process moves to step (5187), and if it is set to ``1'', that is, if the leading edge registration process for the first document has been completed. , the discharge flag (F9) is set in step (5183).
) is “r□”. The discharge flag (F9) is r
1, one set of originals is already being ejected and the transport motor is turned on, so step (51) is set.
85), and when it is reset to '0', the conveyance motor is turned on in step (5184), the pinch roller motor (123) is turned on in step (5185), and the standby flag (F7) is turned on in step (5186). ) to “0.
and moves to step (5187). With this, feeding of the first document from the leading edge registration position onto the document table glass (19) can be resumed (see FIG. 3c).

In step (5187), it is determined whether the sensor (SE2) is off-edge, and if it is not off-edge, step (5187) is performed.
193), and if it is off-edge, proceed to step (51).
In step 88), it is determined whether the document size is horizontal.

If the original image is vertical, the document image cannot fit on the copy paper, so in step (5206) a prohibition signal is sent to the first CPU (20
1), reset the ADF feeding flag (F4) to "0" in step (5207), and output
) to set the discharge flag (F9) to "1" to instruct document discharge, and return to the main routine. If the document size is horizontal, the sensor (SEI) is detected in step (5189).
is on, and if it is not on, that is, 2
If the first original is not on the tray (111) and the first original being fed at this time is the final original, the original is flagged in step (5190) in order to be processed as the second original. (FIO) to “1” and step (
5191), the feed plug (F2) is reset to r□, and the process moves to step (5209).

If the sensor (SEI) is on in step (5189), that is, if the second original is on the tray (111), a switchback timer is set in step (5192). This switchback timer is set to the time from when the trailing edge of the first document is detected by the sensor (SE2) until it completely passes through the nip portion of the pinch rollers (121) and (122).

Next, in step (5193), it is determined whether or not the count of the switchback timer has ended.
) to turn off the conveyance motor and the pinch roller motor (123) (see Figure 3d), followed by step (5195).
Turn on the transport motor in reverse. As a result, the first document is fed backwards toward the pinch rollers (121, <122). Then, in step (5196), the tip registration flag (F5) and the tip registration start flag (F6)
) to "1" to prepare the leading edge registration process for the second document. At the same time, a reversal timer is set in step (5197>), and the process moves to step (5198).This reversal timer is activated after the original has been completely reversed, so that the trailing edge of the document reaches the pinch rollers (121), (122), and (7) the nip section. It is set to the time it takes for the trailing edge to register after abutting.

- Therefore, in step (5198), wait for the count of the reverse rotation timer to end, in step (5199), turn off the reverse rotation of the transport motor, and in step (5200), set the document flag CFIO) to process the second document. '1. Set to . As a result, the trailing edge of the first document contacts the nip portion of the pinch rollers (121) and (122), and waits in a registered state.

Next, in step (5201), the standby flag (F7) is set to 1.
1”. It is determined whether or not the leading edge registration process of the second document is completed, and the standby flag (F
7) is reset to r OJ, step (52
04) and is set to '1', that is,
2 by executing the subroutine of step (5104).
If the leading edge registration process for the 1st sheet of original is completed [see step (5149), step (5202)]
Turn on the conveyance motor and pinch roller motor (123), and set the standby flag (F7) to rO in step (5203).
” and moves to step (5204).

In this way, the first and second originals are successively fed onto the original table glass (19) (see Figures 3g and 3h).

In step (5204), it is determined whether the sensor (SE2) is off-edge, and if it is not off-edge, step (5204)
210), and if the document is off-edge, that is, at the time when the trailing edge of the second document passes the sensor (SE2), the size of the second document is changed to the size of the first document in step (5205). Determine whether it is the same as or not. If they are not the same size, they are not suitable for copying, so a prohibition signal is output to the first CPU (201) in step (5206), and the ADF feeding flag (F4) is reset to "0." in step (5207). , the discharge flag (F9) in step (5208)
is set to "1" to instruct document ejection and return to the main routine. 1st. If the second original is the same size, a stop timer is set in step (5209), and a stop timer is set in step (5209).
5210). This stop timer is the same as the one set in step (5167).

Therefore, in step (5210), wait for the stop timer to finish counting, and in step (5211), turn off the conveyance motor and pinch roller motor (123), and in step (5210), turn off the conveyance motor and pinch roller motor (123).
212) sends the original setting completion signal to the first CPU (212).
1), set the set completion flag (F8) to 11'' in step (5213), and step (5214)
The original flag (FIO) is reset to "0". The two originals are now lined up in the transport direction and placed on the original glass (19).
> This means that the feed has reached the specified position above and stopped (3rd
(See Figure 1).

Next, in step (5215), it is determined whether the sensor (SEI') is on or not. If it is on, that is, if the next original is on the tray (111), the sensor (SEI') is In order to pre-process the edge registration as a manuscript, step (5)
In step 216), the leading edge registration flag (F5) and leading edge registration start flag (F6) are set to "1", and in step (5217), the Te A D F feeding flag (F4) is set to "o".
'' and exit this subroutine. Also,
If the sensor (SEI) is off, that is, the tray (
If there are no more manuscripts in step (111), step (521)
7) Reset the ADF feed flag (F4) to r(3) and end this subroutine.

FIG. 17 shows the subroutine of document ejection processing in single-sheet feeding executed in step (5110) of the main routine of the second CPU (202). This process is executed in single-sheet feeding mode. is selected, or if the last original of an odd number of originals is fed even though 2-sheet feeding mode is selected, or the first original is unsuitable for copying in 2-sheet feeding mode. If it is determined that there is, [NO in step (5188)].

First, in step (5220), the discharge flag (F9) is set to "
1”. The ejection plug (F9) is set to "1" when the image exposure scan for the number of copies of the original is completed in the copying machine main body (1) and the original exchange signal is output.Therefore, the ejection flag (F9) If it remains reset to ``0.'', immediately return to the main routine and execute ``rl''.
, if the setting is completed, it is determined in step (5221) whether or not the set completion flag (F8) is 11. If the set completion flag (F8) is reset to rO, the process moves to step (5224), and if it is set to rl, the transport motor and discharge motor are turned on in step (5222), and in step (5223). Set completion flag (F
8) to "rO" and proceeds to step (5224). As a result, the original that has been completely set on the original table glass (19) starts to be ejected.

In step (5224), it is determined whether the sensor (SE4') is off-edge, that is, whether the trailing edge of the document has passed the sensor (SE4). If step (
5225) sets the ejection timer, and step (522
6). This ejection timer starts when the rear edge of the document is detected by the sensor (SE4') and then the ejection roller (133)
, (134) is set as the time until cutting. Therefore, in step (5226), the ejection timer finishes counting, and then in step (5227') the ejection motor is turned off. The document is now discharged onto the discharge tray (135).

Next, in step (5228), the wait flag (F7) is
g.

In other words, it is determined whether the next document is waiting at the leading edge registration position. If the standby flag (F7) is set to "1", the ADF feeding flag (F4) is set to "1" in step (5232) to execute the feeding process.
and moves to step (5233).

If the standby flag (F7) has been reset to r□,
That is, if the document that has been completely ejected at this time is the final document, the transport motor is turned off in step (5229), and the process proceeds to step (5229).
5230) resets the ADF operation flag (F3) to 10'', and in step (5231) the ADF mode signal is set to ``10''.
0'' and output to the first CPU (201), and the process moves to step (5233).

In step (5233), the discharge flag (F9) is set to "O".
, and in step (5234) set the mode flag (
It is determined whether Fl) is "1" or not. Mode flag (Fl
) has been reset to "0", that is, if the mode is one-sheet feed mode, the process returns to the main routine. If the mode flag (Fl) is set to ``rl'', that is, 2
If it is the sheet feed mode, the feed flag (F2) is set to rl in step (5235), and the process returns to the main routine.

FIG. 18 shows the subroutine of document ejection processing (2) in two-sheet feeding, which is executed in step (Sill) of the main routine of the 20th P U (202). In this subroutine, when the document is ejected, the first document is moved to the ejection roller (131).
, (132), the conveyor belt (125)
Temporarily stop the drive and place the second document on the document glass (
19) After the two originals are temporarily placed on standby and an appropriate distance is left between them, the conveyor belt (125) is allowed to rotate again, and the two originals are placed on the ejection tray (135) in a well-aligned manner. It can be drained completely.

Specifically, steps (524G) to (5243) are the same as steps (5220) to (5223),
The discharge flag (F9) and set completion flag (F8) are “
Ejection processing starts when it is set to 1 (
(see FIG. 4a), and in step (5244) it is determined whether the sensor (SE4) is on-edge. Sensor (
If SE4) is not on-edge, step (5247)
If the document is on-edge, it is determined in step (5245) whether the document flag (Flo) is rO. If the document flag (FIO) is reset to r□, that is, if the document whose leading edge was detected by the sensor (SE4) in step (5224'') is the first document, step (5246) is executed. Turn off the conveyor motor and proceed to step (524).
7). As a result, the second document is placed on standby on the document table glass (19), and only the first document is ejected (see FIGS. 4b to 4d).

In step (S247), it is determined whether the sensor (SE4) is off-edge. If the sensor (SE4) is not off-edge, the process moves to step (5252), and if it is off-edge, it is determined in step (5248) whether or not the document plug (FIO) is "1". The original flag (FIO) is “0”
．． , that is, step <5247
), if the document whose trailing edge is detected by the sensor (SE4) is the first document, the transport motor is turned on in step (5250), and the document flag (FIO) is set in step (5251).
> to "1" and return to the main routine. As a result, the ejection of the second document that has been waiting on the document table glass (19) is restarted (see FIG. 4C).

On the other hand, in the step (5248), the original flag (FIO
) is set to rl, that is,
If the document whose trailing edge has been detected by the sensor (SE4) in step (5247) is the second document, step (5247)
Set the discharge timer in step 49) and proceed to step (5252)
-Move to.

- Steps (5252) to (5257) are the same as steps (5226) to (5231), and the ejection motor is turned off when the ejection timer finishes counting.
5252), YES, step (S253) 1. Execute the next document feeding process [step (5254)
No. 1 step (5258)], and if the final document has been completely ejected, execute the end process [step (5258)].
54), YES, steps (5255) to (5257)
], then in step (5259) the departure flag (
F9) is reset to "10", and in step (5260), the document flag (FIO) is reset to "0", and this subroutine is ended.

FIG. 19 shows another subroutine for document ejection processing (2) in two-sheet feeding that can be executed in step (Sill) of the main routine of the second CPU (202).

In this subroutine, the discharge rollers (131) to (134)
) is set higher than the original transport speed by the transport belt (125), and the two originals are ejected onto the ejection tray (135) in good alignment with an appropriate interval between them.

Specifically, steps (5270) to (5273) are the same as steps (5240) to (5243) and (5220).
) to (5223), and the discharge flag (F9)
, the discharge process is started when the set completion flag (F8) is set to rl. In this case, the document conveyance speed by the discharge rollers (131) to (134) is set higher than the document conveyance speed by the conveyor belt (125), and the distance between the first and second document is gradually increased. (See Figures 5a and 5b).

Next, in step (5274) it is determined whether the sensor (SE4) is off-edge. If the sensor <5E4) is off-edge, the process moves to step (5278), and if it is off-edge, the document flag (FIO) is set in step (5275).
) is “1”. If the original flag (FIO) is reset to 0°, that is, step (52
If the document whose trailing edge was detected by the sensor (SE4) in step 74) is the first document, the document flag (Flo) is set to "1" in step (5277) and the process returns to the main routine.

Once again, this subroutine is fooled and steps (527
If it is determined in step 5) that the original flag (FIO) is set to "1", that is, step (5274)
If the document whose trailing edge is detected by the sensor (SE4) is the second document, a discharge timer is set in step <5276).

The following steps (5278) to (5286) are the same as steps (5252) to (5260) above, and the ejection motor is turned off when the ejection timer finishes counting [YES in step (5278), step (5279)]. , start feeding the next document and end this subroutine [Step (5280)-C' NO, Step (
5284) to (5286)], if the final document is to be ejected, execute end processing and end this subroutine [step (5280) YES, step (5
281) ~(5283).

(5285), (5286)].

[Main part of the embodiment] In the above configuration, when the two-sheet feed mode is selected [FIG. 9, step (513), if copy paper loaded vertically is selected, or Even if copy paper loaded horizontally is selected, if there is copy paper loaded vertically in another paper source, the machine will automatically switch to select the copy paper loaded vertically. [Same figure, step (
515), YES (step 518)], the following process is executed and the two-sheet feed mode is accepted. on the other hand,
If there is no copy paper loaded vertically in the paper feed section [No in step (515) in the same figure], subsequent operations are prohibited [in step (516) in the same figure], and the original is fed. This will not occur and a message to that effect will be displayed [see step (5) in the same figure.
17)], in this case, the operator can start the copying operation by reloading the copy paper vertically and selecting the two-sheet feeding mode again. .

This prevents the risk of inadvertently performing a misprint in which an image is cut off in the two-sheet feeding mode.

In addition, if the copying machine main body (1) is equipped with a book division copying function that performs exposure scanning of images on one side of two originals, when this book division function is selected, horizontal passing is performed. A two-sheet feed mode with copy paper selected is enabled.

[Other Examples] Note that the present invention is not limited to the above-mentioned embodiments, and can be variously modified within the scope of the gist.

For example, in the above embodiment, the pinch rollers (121) and (122) were used as means for registering the leading and trailing edges of the document, but as shown in FIGS. 20a to 20d, the gate (129) ) can also be used. In this case, the gate (129) is a pinch roller (121),
(122) is installed on the downstream side in the feeding direction so as to be able to advance and retreat with respect to the feeding path, and the upper pinch roller (121) can move toward and away from the lower pinch roller (122).

In this case, when the two-sheet feed mode is selected and the ADF start switch <SSw) is turned on, the pinch roller <121) is separated from the lower roller (122), and the gate (129) enter the road. The originals stacked on the JK original tray (111) are fed from the top layer original (Dl) by the rotation of the pickup roller (112), are separated by forward/reverse rollers (113) and (114), and the leading edge are pinch rollers (121), (122)
The gate (129) passes through the gap and comes into contact with the gate (129), and the tip registration process is performed (see Figure 20a).Then, the gate (129) is retracted from the feeding path and the pinch roller (121) is moved downward. The conveyor belt (125) is also driven to rotate in the forward direction while being pressed against the roller (122). With this, the document <Dl> has a gate (129) at the rear end.
(see Figure 20b).

Next, the gate (129) enters the feeding path, and
The pinch roller (121) separates from the lower roller (122). At the same time, the conveyor belt (125) is indicated by the arrow (C'')
The original (Dl) is reversely driven in the direction shown in FIG. Feeding the second document (D2) on the document tray (111) with the trailing edge registration process applied to Dl),
Perform edge registration processing, and with this, two originals (D
i) and (D2) are successively arranged side by side with the rear end resist and the front end resisted at the gate (129).

From this state, the gate (129) is retracted from the feeding path, and the pinch roller (121) is moved to the lower roller (12).
The conveyor belt (12
5) is also driven forward, and the originals (DI) and (D2) are simultaneously fed onto the original platen glass (19) (see Figure 20d), and the rear end of the second original (D2) When the image reaches a predetermined position on the original table glass (19), that is, the exposure start position by the optical system (2o), the pinch roller (121),
(122) and the rotational drive of the conveyor belt (125) are stopped.

On the other hand, as for the process of setting the original in a predetermined position, control was shown in which the feeding is stopped using a timer based on the trailing edge detection signal of the original by the sensor (SE2). It is also possible to switch back the document by providing a stopper with a
125) is reversed and switched back to position the rear end of the document in contact with the stepped portion or stopper.

In addition, in the present invention, two originals are placed on the original table glass (1
9) Various means other than the above-mentioned methods may be used for placing the originals side by side. For example, in the sorting section when feeding the originals, the second original is placed next to the first original. Alternatively, the document conveying belt (125) may be moved two times in the conveying direction.
It is also possible to adopt a method of dividing and installing. In this case, when ejecting the original, the timing of the ejection drive of the conveyor belt that holds the second original may be delayed, or the ejection speed may be set to be slow, thereby creating an appropriate space between the original and the first original. The output tray (13
5) It is possible to discharge above.

ERI W As is clear from the above explanation, according to the present invention, when the two-sheet feeding mode is selected, the copy paper loaded vertically among the copy papers loaded in the paper feed section The 2-sheet feeding mode is accepted only when is selected, while if the copy paper loaded in the horizontal thread is selected, the mode is automatically switched to select the copy paper loaded in the vertical thread. This makes it possible to prevent errors such as image cuts when copying in two-sheet feeding mode, and the copy paper is automatically switched to lengthwise paper, improving usability.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIGS. 1 to 19 show an embodiment of a copying apparatus according to the present invention, in which FIG. 1 is an internal configuration diagram as a copying system, and FIG.
The figure is a perspective view with a part of the ADF cut away, Figures 3a to 3.
Figure 1 is an operation explanatory diagram showing the document feeding process, Figures 4a to 4
Fig. c is an explanatory diagram of an operation showing one example of the document ejection process, and Figs. 5a to 5c are explanatory diagrams of the operation showing other examples of the original ejection process.
FIG. 6 is a plan view of the operation panel, FIG. 7 is a block diagram of the control circuit, and FIGS. 8 to 19 are flowcharts showing control procedures. FIGS. 20a to 20d are operation explanatory diagrams showing document feeding processing in a modified example of the registration means. (1) Copying machine main body, (100) Automatic document feeder (ADF), (110) Original feeding section, (1
11)...Document tray, (112)...Pickup roller, (120)...Document transport unit, (121),
(122)...pinch roller, (125)...conveyor belt, (129)...gate, (130)...
Original ejecting section, (135)... Ejection tray, (157)
. . . Copy paper selection key, (159) . . . Feed mode selection key, (SEI) to (SE4) . (SW6) to (SW9)...Switches for copy paper size detection.

Claims (1)

[Claims] 1. It is possible to stop two originals fed from the original feeding unit in parallel in the transport direction at a predetermined position on the platen, and to eject the originals from the platen after the exposure operation is completed. A copying machine equipped with an automatic document feeder, comprising: a means for selecting a two-sheet feed mode for originals; a means for detecting the size of copy paper loaded in a paper feed section of the copying machine; A method for selecting the copy paper to be used, and only when the copy paper loaded vertically among the copy papers loaded in the paper feed section is selected when the two-sheet feeding mode is selected. A control means that accepts the two-sheet feeding mode and automatically switches to select the copy paper loaded in the vertical threading mode when the copy paper loaded in the horizontal threading mode is selected. A copying device characterized by: 2. A patent characterized in that the control means displays an external display to that effect if there is no copy paper loaded vertically in the paper feed section when the two-sheet feeding mode is selected. A copying apparatus according to claim 1.