JPH02215667A - Paper re-feeder - Google Patents

Abstract

PURPOSE:To feed papers promptly and forcibly by having the papers housed in a short-interval manner with a belt intermittently driven, when housed, and fed in a preset long-interval manner for a re-feeding mode and in the same interval manner as housed for a forcibly discharging mode. CONSTITUTION:Papers in which pictures are formed by a copying machine passes through a passing paper switching portion 120 and an intermediate carrying portion 180 and are wound together with a belt 240 on a bobbin 230 while shortened in interval via an intermittently turned guide roller 210 and the bobbin 230. Next, in a re-feeding mode, a bobbin 253 is driven in a intermittently reverse direction to wind the belt 240, so that the papers are fed out to a re- feeding portion 320 while released by a scraper 228, as they are lengthened in interval with the guide roller 210 turned in a reverse direction. When the paper is jamed in a housing portion 200 and the re-feeding portion 320, a guide cover 201 opens to come into a forcibly discharging mode, so that the guide roller 210 and the bobbin 235 are turned in a reverse direction to forcibly discharge the papers to the cover 201 at the same interval as housed. It is thus possible to discharge the papers promptly and forcibly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a paper refeeding device, particularly a single-sided copied sheet discharged from an image forming device body such as a copying machine or a laser printer.
The present invention relates to a paper refeeding device that once stores paper in a paper storage unit and then feeds the paper from the paper storage unit to the main body of an image forming apparatus for double-sided 7-containing copying.

Conventionally, this type of paper refeeding device sequentially accommodates sheets of single-sided copied paper in a horizontally or vertically arranged tray in a flat state, and then feeds the sheets one by one from the tray. (
It was configured as follows:

However, in many cases, the paper is heated and curled by the stabilizer in the image forming device, so it is necessary to guide the paper one by one into the tray or to store the paper one by one.
It is difficult to separate the sheets one by one and refeed them, resulting in paper jams, double feeding, etc.・There was a risk of trouble occurring.

Therefore, US Patent No. 3.862.802 (corresponding domestic application, Japanese Patent Publication No. 57-42861),
No. 8-188260, No. 59-39561 (
As described in the corresponding U.S. Pat. A paper winding-type refeeding device has been proposed in which paper is wound together with a belt and then fed out during rewinding. According to this,
It is possible to reliably store and refeed sheets one by one. However, the problem here is that due to the operator's carelessness, unnecessary paper is stored in the belt, or the previous paper is left in the belt when copying is started. It is processing. Such inconveniences can occur if: ■ The previous operator forgets to remove the paper from the paper refeeding device; ■ If the previous operator accidentally selects duplex/composite copying and executes the copy process on the first side; ■ If the paper is being stored This occurs when the device is turned off, etc. In the paper winding method using a belt, an operator manually rolls the paper onto the belt.
It is practically impossible to remove it from

Therefore, an object of the present invention is to quickly remove paper that has been wound around the belt and left in the storage section due to incorrect mode settings or forgotten paper refeeding in a paper winding type paper refeeding device. The purpose is to make it possible to discharge the liquid.

Means and Function for Achieving the Objects In order to achieve the above objects, the paper refeeding device according to the present invention has the following features: (a) refeeding the paper once stored in the paper accommodating section in order to perform image forming processing; (b) Forced ejection mode in which paper once stored in the paper storage section is ejected without image forming processing; (e) When storing paper, the belt is intermittently driven to reduce the paper interval and store the paper. The apparatus further comprises a control means for feeding out the sheets at predetermined intervals in the paper refeeding mode, and feeding out the sheets at intervals maintained at the time of storage in the forced ejection mode.

In order to increase the efficiency of storing paper on the belt, the paper is wound around the belt while being stored with a reduced interval during conveyance. Therefore, the paper is enlarged at predetermined intervals and then re-fed.

On the other hand, if a sheet of paper is left in the storage unit due to some mistake, the sheet of paper is forcibly ejected without being subjected to image forming processing.

It would be a waste of time if the sheets were fed out at wider intervals during this forced ejection, as in the case of refeeding, but in the present invention, the sheets are fed out at the same intervals as they were when they were stored.

Note that the forced ejection mode includes a mode in which the cover member of the paper refeeding device is opened and the paper is directly ejected from the opened part to the outside of the machine;
Alternatively, there is a mode in which the paper is discharged outside the image forming apparatus through a paper passing path in the main body of the image forming apparatus.

[Explanation] Hereinafter, embodiments of the paper refeeding device according to the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1, the paper refeeding unit (100), which is an embodiment of the present invention, is located on the right side of the copying machine main body (1) where a paper ejection section and a refeed paper receiving section are formed. A sorter (400) is detachably attached to the right side of the paper refeeding unit (100).

[Schematic configuration and operation of copying machine main body] The copying machine main body (1) is equipped with a known copying mechanism and is mounted on a desk <90)J2. Inside, a photoreceptor drum (1o) is provided to be rotatable in the direction of the arrow (a), and around it are a main eraser lamp (11), a sub-charger (12), and a supply eraser lamp (13). ), main charger (14)
, a developing device (15) of a bad air brush type, a transfer charger (16), a paper separation charger (17), and a cleaning device (18) are provided. Photosensitive drum (1
0) is sensitized and charged by passing through the eraser lamps (11), (13) and the charged charges (12), (14), and is subjected to image exposure from the direction of arrow (b) by the scanning optical system (20). As a result, an electrostatic latent image is formed on the surface.

Copy paper is placed in two upper and lower paper feed trays (30).
(32) In this embodiment, A4 size horizontal paper is stored in the "-"-stage cassette (30), and B5 size horizontal paper is stored in the lower cassette (32). . Each paper feed power is high! , (30), (32) are the same size as the cassettes (30), (32).
(32).
>, ff5z> and is identified based on a pre-assigned code. At the same time, the sensor (Ps
i), (PS2) are cassettes (30), (32>
It also detects the presence or absence of paper inside.

The paper in the upper cassette (30) is fed by the paper feed roller (31), and the paper in the lower cassette (32) is fed by the paper feed roller (3).
3), it is supplied into the machine, guided to the timing roller (35) by a guide means (not shown), and temporarily stopped there. -11 The copy paper stopped is placed on the photoreceptor drum (10
) The toner image is transferred to the transfer section in synchronization with the image formed on the photosensitive drum ( 10) is separated from the surface. After that, the fixing device (
37) and the image is fixed, then the discharge roller (37)
8), from (39), refeed x unit (100
) to i#. Note that the photosensitive drum (10) after transfer
includes a cleaning device (1g) and an eraser lamp (11g).
> The toner and charge remaining on the surface are removed, and the next copying process is completed.

On the other hand, at the bottom of the copying machine main body (1), a timing roller (
A paper refeeding path (40) is provided, which is composed of rollers (41>, (42), etc.) for conveying the paper to 35).

The paper is fed from the paper refeeding unit (100) to this path (4) with the lobbyed image side facing up during double-sided copying, and with the front and back sides reversed and facing down during composite copying.
0), is again supplied to the timing roller (35), and reaches the aforementioned transfer section.

By the way, the main motor (Ml) is connected to the paper feed roller (31
), (33), timing roller (35), conveyor belt (36), fixing device (37), discharge roller (38),
(39) Also drives the paper transport system in the paper refeed path (40) and the paper transport system in the paper refeed unit (100), which will be described below. Further, the developing motor (M2) drives the image forming section including the photosensitive drum (10) and the developing device (15).

[Configuration and operation of paper refeeding unit] This paper refeeding unit (100) has the following structure as shown in Fig. 2.
A paper feeding switching unit <120) that receives paper ejected from the copying machine main body (1) and switches the paper feeding form as appropriate according to the copy mode, and temporarily stores paper that has been copied on one side during duplex/composite copying. Winding allowance paper storage section (2
00), an intermediate conveyance unit (180) that feeds the paper to the paper storage unit (200), and a refeed unit that feeds the paper stored in the paper storage unit (200) one by one to the paper refeed path (40). It consists of a paper section (320). A micro switch (
MS) is detected by the on/off signal.

The paper refeeding unit (100) also includes a paper output tray (1
75) or the sorter (400) is selectively the mounting section. Fig. 2 shows the state in which the paper eject]・1-i (X75) is installed, and Fig. 1 shows the state in which the sorter (400) is installed. This means that multiple bins (4 bins) stacked vertically
10) Arrange the sheets in order, and put them in a sorter (400 sheets).
), the L-most bin (410) functions as a paper discharge tray during non-sodding.

[Paper passing switching unit] The paper passing switching unit (120) includes a guide plate (121,),
(122).

(123), paper feeding direction switching claw (125), (130
), discharge rollers (135), (136), etc. The switching claw (125) is connected to the guide surface (1) that guides the paper toward the ejection rollers (135) and (136).
, 25a), the receiver transfers the loaded paper to the intermediate conveyance roller (190).
), an arc-shaped guide surface (1
25b), it has an arcuate guide surface (125e) that guides the paper from the discharge rollers (135) and (136) side to the intermediate conveyance rollers (190) and (191) side.

A resin flexible film (129) is attached to the third guide surface (12Se) to serve as a paper guide. This flexible film (129) has a guide plate (123) at the tip.
), and the paper conveyed from the left in Figure 2 is moved to the right [direction of arrow (A)].
The paper is switched from the right side by the paper switching claw (125).
It has a function of guiding to the guide surface (125e) of.

The switching claw (125) is rotatably mounted around a support shaft (126) provided between the front frame (101) and the back frame (111,) of the unit (100), and is shown in FIGS. As shown in Figure 7, the support shaft (126) is attached to the front frame (1
It is connected to the plunger of a solenoid (SLI) provided in 01) via an arm (127). Switching claw (
125) is set to the chain double-dashed line position in FIG. 2 by the action of a return spring (not shown) when the solenoid (SLI) is turned off, and is set to the solid line position when the solenoid (SLY) is turned on.

Another switching claw (130) includes a guide surface (130a) that guides the paper toward the paper output tray (175) or the sorter (400), and an arcuate guide surface (130a) that guides the paper toward the right side of the unit (100). 130b), and the frame (101), (1
11) It is rotatably mounted in between. This support shaft (13
1) is connected to the plunger of a solenoid (SL2) provided on the front frame (101) via an arm (132), as shown in FIGS. 6 and 7, similar to the switching claws (1, 25). ing. The switching claw (130) is a solenoid (
When SL2) is turned off, a return spring (not shown) moves the camera to the position indicated by the two-dot chain line in FIG.・When the solenoid (SL2) is turned on, it is set to the solid line position.

Moreover, this switching claw (130) is connected to the frame (101),
(111), and is detachable from the sorter (4).
00) can be removed if not connected.

The paper discharge tray (175) is supported at one end by a support plate (17B). The trailing edge of the paper discharged from the discharge rollers (135) and (136) is regulated by the regulation plate (1, 77).
Aligned. Note that when this paper output tray (175) is attached, the switching claw (130) is removed from the unit (100), and when the sorter (400) is attached, the paper output tray (175) and the support are removed. Board (176)
is removed and a switching claw (130) is attached in its place.

On the other hand, the guide plate (123) has a photo sensor (SEX
) is attached via a bracket (133).

This sensor (SEX) is connected to the actuator (134)
protrudes into the withdrawal path formed by the guide surface (125a) of the switching claw (125) and the guide plate (123), and detects the paper passing through the path.

The upper ejection roller (135) is coaxially equipped with a roller (135a) with a slightly larger diameter (see Fig. 5), and is used not only to eject the paper but also to switch back the paper during composite copying. It is said that it can be driven in forward and reverse rotation. here,
The drive mechanism is the 4th V! ! J, will be explained with reference to FIG.

A bracket (141) and a timing pulley (x42) are attached to the support shaft (1, 40) fixed to the back frame (111).
a), a gear (142b) is rotatably mounted, and the pulley (142a) and gear (142b) can rotate integrally. The gear (144) is attached to the bracket (141).
, (145), <146) are each rotatably mounted, the gear (144) meshes with the gear (142b),
The gear (145) meshes with the gears (142b) and (146). The support shaft (137) of the upper discharge roller (135)
) A gear (13B) is fixed to the end.

Also, the bracket (14i) is a coil spring (147).
) in the direction of arrow (e), and is connected via a lever (148) to the plunger of a solenoid (SL3) fixed to the rear frame (111). When the solenoid (SL3) is turned off, the bracket (141) moves as shown by the arrow (e) under the action of the coil spring (147).
The gear (146) meshes with the gear <138).

When the solenoid (SL3) is turned on, the bracket (14
1) rotates in the opposite direction to the arrow (e), and the gear (144)
meshes with gear (138) instead of gear (146).

A timing belt (151) is stretched between the timing pulley (142a) and other timing pulleys (150a) and (195a). Timing pulley (1
50a) is rotatably attached to a bracket (152) fixed to the back frame (111) via a support shaft (153), and a gear (150b) rotatably provided integrally with the pulley (150a) is attached to the bracket. It meshes with a gear (155) rotatably attached to the tip of (152). Further, the gear (155) meshes with a gear (50) fixed to the shaft end of the lower discharge roller (38) of the copying machine main body (1). Nowadays one timing bully (195a)
is fixed to the end of the support shaft (192) of the intermediate conveyance roller (190).

In the above configuration, the conveyance system of the paper switching section (120) is driven by the main motor (Ml) in the copying machine main body (1).
jJ will be done. In other words, the gear (
50) always rotates in the direction of arrow (d)! IyJl,
This rotation is caused by gear (L55)-(150b) and pulley (1
50a>, and rotates the timing belt (151) in the direction of arrow (e). Furthermore, this rotation is caused by the pulley (ia) when the solenoid (SL3) is disabled.
za), gear (142b).

(145). (146) to the gear (138), and the upper discharge roller (135) and the stiffening roller (13
sa) in the direction of arrow (f). At this time, the gear (144) rotates idly. On the other hand, the solenoid (SL
3), the gear (144) meshes with the gear (13B) as the bracket (141,) rotates, and the roller (135).

(135a) is reversed in the opposite direction to the arrow (f). At this time, the gear (146) rotates idly.

Note that the lower discharge roller (136) is the upper discharge roller (1
35) and rotates as a result.

(Intermediate conveyance section) The intermediate conveyance section (180) includes a guide plate (181), a guide frame (182), an intermediate conveyance roller (190),
(191). Guide frame (18
2) is rotatably installed around the bottle (183) as a fulcrum, and can normally be set to the solid line position in Figure 2 under its own weight.

When this guide frame (182) is rotated in the direction of arrow (g), the intermediate conveyance path is opened, and jammed paper can be easily removed.6 The intermediate conveyance roller (190) is connected to the timing belt (151), The other roller (191) is rotatably driven in the same direction [arrow (e) direction], and the other roller (191) is attached to the guide frame (182>).
) and rotates as a result.

On the other hand, a photo sensor (SE2) is mounted on the guide plate (181).
is attached via the bracket (185).

In this sensor (SE2), the actuator (186) protrudes into the intermediate conveyance path and detects the sheet C passing through the path.

(Paper conveyance operation by the paper feed switching unit and intermediate conveyance unit) When the paper is ejected after copying to the second side in single-sided copy mode and duplex/composite copy mode, the solenoid (SLI), (5L2) The switch is turned off, and the switching claws (125) and (130) can be held at the positions indicated by the dotted chain lines in FIG. Further, the solenoid (SL3) is also turned off, and the discharge rollers (135) and (136) are driven to rotate normally. When the sorter (400) is connected, the paper sent from the ejection rollers (38) and (39) of the copying machine main body (1) to the paper switching section (120) is passed through the guide plate (123) and the switching claw. (125) guide surface (125
a) While being guided by the guide surface (130a) of the switching claw (130), a conveying force is applied by the discharge rollers (135) and (136>), and the sheet is sent out to the sorter (400).

When the paper output tray (175) is installed, the switching claw (130) is removed and the paper is placed on the output roller (175).
35), (136) directly from the paper ejection tray L-i (1,75).
) is discharged on top.

When the paper that has been copied on the fourth side during double-sided copying is ejected from the copying machine main body (1), the solenoid (SLI)
) is turned on, the switching claw (125) is set to the solid line position, and the paper is guided by the upper part of the guide plate (181) and the arcuate guide surface (125b) of the switching claw (125), and the paper is moved to the intermediate position. Conveyance roller (190).

(191) and is sent to a paper storage section (200), which will be described in detail below.

On the other hand, when the paper copied on the first side is ejected from the copying machine main body (1) in composite copy mode, the solenoid (
SLI) is off, solenoid (SL2) is on,
The switching claw (125> is at the two-dot chain line position, the switching λ claw (130
) is set to the solid line position. In addition, solenoid (SL)
3) is initially turned off, and the discharge roller (135),
(136) can be driven in normal rotation. The paper is conveyed in the direction of the arrow (A) in the same way as in the single-sided copy mode, and the switching claw (
130) between the paper refeed unit (100) and the sorter (400).

On the other hand, when the paper ejection tray (175) is attached [at this time, the switching claw (130) is removed], the paper is guided onto the paper ejection tray (175).

Thereafter, the solenoid (5L3) is turned on after a predetermined time after the trailing edge of the paper is detected by the sensor (SEX), and the discharge rollers (135) and (136) are switched from normal rotation to reverse rotation. This predetermined time is the time it takes for the trailing edge of the paper to move from the detection point of the sensor (SEX) to an arbitrary position between the leading edge of the film (129) and the nip portion of the discharge rollers (135) and (136). It is. Ejection roller (1
35).

(136) is driven in reverse, the paper is conveyed in the opposite direction to the arrow (A) with its trailing edge leading, and the film (129) and the arcuate guide surface (125e) of the switching claw (125) while being guided by the intermediate conveyance roller (19
0).

(191) and is fed into the storage section (200).

Next, when the leading edge of the following paper is completely detected by the sensor (SEI), the solenoid (SL3) is turned off and the discharge roller (135) is switched to normal rotation drive.

In both the double-sided copy mode and composite copy mode, when the number of copies per document set by the operator is stored in the storage section (200), each roller (13
5), (190) are stopped, and the switching claw (12) is stopped.
5). (130) respectively return to the positions shown by the two-dot chain lines.

(Paper storage unit) The paper storage unit (2OO) has a guide cover (201),
A guide roller (210), pinch rollers (215) and (216) that follow it, a guide plate (219), and a switching claw (220).

(225), Scraba (228), Bell! - Winding bobbin (230), belt rewinding bobbin (23)
5), Belt (24O), Idle roller (245)
). (246), (247), etc.

Basically, the paper that has been conveyed downward from the intermediate conveyance rollers (190) and (191) is transferred to the guide roller (210).
, pinch rollers (215) and (216),
Feed it to the lower bobbin (230). At this time, the bobbin (
230) is the arrow (m) direction 1. :' The rotation is driven and the bobbin (230) is wound together with the paper sheet (240)!
taken. When refeeding paper, the upper bobbin (235) is rotated in the direction of arrow (m) to move the belt (240) to the bobbin (
At the same time, the paper is rewound to the scrubber (22
8), the paper is fed upward while being peeled off, and then fed from the guide roller (210''), which reverses in the direction of the arrow (j'), to the re-feed unit (32).
0).

The switching claw (220) has bins (221) provided at both ends thereof.
As shown in FIG. 7, it is rotatably attached to a protrusion (202) provided on a guide cover (201) via the guide cover (201), and is biased in the direction of arrow (h) by a return spring (not shown).

Normally, the right end portion of this switching claw (220) in FIG. 2 abuts against the stepped portion (201a) of the guide cover (201), and is held at the position shown by the two-dot chain line. The spring force of the return spring that biases the switching claw (220') is set to be relatively weak, and the switching claw (220) is connected to the intermediate conveyance roller (190).

(191), the leading edge of the paper being conveyed is on the guide surface (
When it comes into contact with and presses 220a), it rotates to the solid line position, opens the conveyance path, and guides the leading edge of the paper to the nip between the guide roller (210) and the pinch roller (215).

The guide roller (210) is configured to be able to be switched between forward and reverse directions and to be driven intermittently in order to store the paper and take out the paper during re-feeding, and its drive mechanism will be described with reference to FIGS. 4 and 5. Note that this drive mechanism also operates at the same time as the paper refeeding section (3
20) registration roller (330).

(331) is also driven.

A timing pulley (195b) integrated with the timing pulley (195a) fixed to the support shaft <192) of the intermediate conveyance roller (1, 90), and a timing pulley (195b) that is integral with the timing pulley (195a) fixed to the support shaft <192) of the intermediate conveyance roller (1, 90), and Installed timing pulley (2
A timing belt (260) is stretched between the timing pulley (261a) and the timing pulley (261a), and a gear (261b) that can rotate integrally with the timing pulley (261a) meshes with a gear (264) of a clutch (CLI). The clutch (CLI) is attached to the end of the support shaft (332) of the registration roller (330). The clutch gear (264) is always rotatable, and furthermore, a support shaft (265) is attached to the back frame (111).
) is engaged with the gear (266b) attached through the gear.

The timing belt (266a) which is rotatable integrally with the gear (266b) and the timing pulley (271a) which is rotatably mounted on the support shaft (270) fixed to the back frame (111) are attached to the timing belt (266a) 268) is installed. A gear (27) is further attached to the support shaft (270).
1b), the bracket (273) is rotatably attached,
The gear (271b) can rotate integrally with the pulley (271a).

Gear (274) is on bracket 1 (273). (275
), (276) are respectively rotatably mounted, and the gear (275) meshes with the gears <271b) and (276>. A clutch ( CI-2) is attached, and its clutch gear (28O) is connected to the gear (273) of the bracket (273).
Either 274) or 276 can be engaged interchangeably. That is, the bracket (273) is biased in the direction of arrow <i> by the coil spring (277), and the solenoid (
It is connected to the plunger of SL5). solenoid(
When SL5) is turned off, the bracket (273)
is rotated in the direction of the arrow (i) by the action of the coil spring (277), and the gear (276) meshes with the clutch gear (280>. When the solenoid (SL5) is turned on, the bracket (273) moves in the direction of the arrow (i). It rotates in the direction opposite to i>, and the gear (
274) is the clutch gear (276) instead of the gear (276).
80).

When both of the clutches (CLI) and (CL2) are in the OFF state, the rotation of the gears (264) and (280) is controlled from 1 to 1 to the rotation of the distro roller shaft (332) and the guide roller shaft (
211) G is transmitted, and when turned on, the transmission of the rotation is cut off.

With the above configuration, the timing belt (1,51
> (7) The driving force is 195a), (t95
b > Timing belt (260) via arrow (e)
direction, and the pulley (261a), gear (
261b), clutch gear (264), gear (266)
b), the timing belt (
268), and the belt <268) is transmitted to the arrow (,)
direction. Furthermore, this rotation is controlled by the solenoid (
When SL5) is turned off, the pulley (271a),
It is transmitted to the clutch gear (280) via the gears (271b), (275>, (27B), and the guide roller (2
10) Reverse the arrow (j゛). On the other hand, when the solenoid (SL5) is turned on, the gear (274) engages with the clutch gear (280) as the bracket (273) rotates in the direction opposite to the arrow (i>), and the guide roller (210)
) will rotate forward in the direction of arrow (j).

The pinch lawns (215) and (21B) are each installed to be rotatable as a result of the guide roller (210), and the pinch lawn (215>) is attached to the guide cover (201).
), and the pinch lawn (216) is attached to arms (217) provided at both ends of the support *th (211) of the guide roller (210) via a support shaft (218).

The guide cover (201) has a paper guide part (201b), and is normally set at the position indicated by the solid line in Figure 2, and covers the right side of the paper refeed unit (100) to prevent paper jams, etc. When a problem occurs, the paper storage section (200) can be opened by tilting it outward to a substantially horizontal position as shown in FIG. Specifically, there are bins (203) and (204) provided at the front and back of the guide cover (201).

(205> is the front) 1~-mu (101) and the back frame <1
11) guide groove (112). (113) and the right side surface part, and the guide cover (201) can be engaged with the bottle (113) and the right side part.
203) engages with the lower end of the guide groove (112), and the magnetic plate (206) fixed to the upper end of the guide cover (201) is attracted to the magnet (114) provided on the frame (101>, (111)). By doing so, the set state is set as indicated by the solid line in Figure 2.To open this guide cover (<201) outward, open the guide cover (<201).
1) Hold the handle (2O7) installed on the top of the bottle (2).
Using 03> as a fulcrum, rotate the guide cover (201,) itself slightly in the direction of arrow (k) to attach magnetic play 1- (206).
and the magnet (114). At this time, the bottle (204) moves and is located in the vertical part of the guide groove (11, 3). Next, when the guide cover (201) is pulled upward and the bottle (204) is disengaged from the guide groove (113), the guide cover (201) rotates in the direction of arrow (k) due to the moment due to its own weight. The guide cover (201) finally allows the bottle (203) to engage with the upper end of the guide groove (112), and the bottle (205)
By engaging with the right side portions of the frames (101) and (111), the frame L is set in a substantially horizontal state as shown in FIG. 3, and the paper storage section (200) is opened.

In this state, the storage section (200) or the paper refeed section (32
0) Remove the jammed paper. In addition, the opened guide cover (201) is used to force the paper once wound onto the bobbin (230) to be ejected directly to the outside of the paper refeeding unit (100) without passing through the copying machine main body (1). It can be used as a discharge tray. Forced ejection is executed by turning on a switch (SW) that can be operated from the outside by an operator when the guide cover (201) is opened, and this control will be described in detail later as a control procedure.

On the other hand, a photo sensor (SE
5) is installed to detect the open/closed state of the guide cover (201).

Next, the belt (240) for storing paper and the bobbins (230) and (235) for holding it will be explained.

The bobbins (230) and (235) are respectively attached to spindles (231) and (236) rotatably mounted between the front frame (101) and the back frame (111), and the bobbin (230) is shown in FIG. The outer diameter indicated by the solid line, the bobbin (2
35) has an outer diameter shown by a two-dot chain line. Belt (2
40) is fixed at both ends to bobbins (230), (235), and idle rollers (245), (246), (
The rack is passed to bobbin (230), (247),
235) and then rewound. In the initial state, the belt (240) is wound back toward the bobbin (235) (indicated by a solid line in FIG.
230) is rotationally driven in the direction of the arrow (rn), the bobbin (235) is driven to rotate in the direction of the arrow (m'), and the belt <240) is wound around the bobbin (230), Finally the bobbin (230).

(235), the belt (24O) is in the state shown by the two-dot chain line. After that, to return to the initial state, use the bobbin (
This is done by rotating the bobbin (235) in the direction of the arrow (m), and the bobbin (230) is driven to reverse in the direction of the arrow (m').

The bobbins (230) and (235) are driven by motors 0 and 13) which can be switched between forward and reverse rotation and can be controlled continuously. explain.

The motor (M3) is fixed to the back frame (111) via bracket 1-(281), and is rotated by a timing pulley (282) fixed to its output shaft and a support shaft (283) fixed to the back frame (111). A timing belt (28
6) is stretched. The support shaft (283”) is further equipped with a gear (284b), bracket 1-(287), and gear (2).
88a) and (288b) are installed, and the pulley (284a)
) and gear (284b) are integrally rotatable, and gears (288a) and (288b) are integrally rotatable. In addition, the support shaft (2) fixed to the back frame 1/- frame (111)
90) has gears (291a) and (291b) rotatably attached thereto. The gear (284b) that rotates together with the boot 1 bar 284a) meshes with the gear (291a),
A gear (291b) that rotates together with this gear (291a)
) meshes with the gear (288a). Furthermore, the gear (288b) that rotates together with this gear (288a) is
The gear (2) is rotatably attached to the bracket (287).
93).

On the other hand, the support shaft (250) fixed to the back frame (111)
.

(252> and <254> each have a gear (251)
, (253>, physically rotatable gear (255a
), (255b) are rotatably mounted. The gear (251) meshes with the gear (237) fixed to the end of the bobbin support shaft (236), and the gear (253) meshes with the gear (253).
5a), and the gear (255b) meshes with the bobbin support shaft (23
1) meshes with a gear (232) fixed to the end.

The bracket (287) is biased in the direction of arrow (n) by a coil spring (294), and is also
111) is connected to the plunger of a solenoid (SL4) fixed to the solenoid (SL4). When the solenoid (SL4) is turned off, the bracket (287) is connected to the coil spring (29).
4) rotates in the direction of arrow (n), and the gear (293)
meshes with the gear (251). When the solenoid (SU>) is turned on, the bracket (287) rotates in the opposite direction to the arrow (n), and the gear (293) meshes with the gear (253) instead of the gear (25'l). do.

In the above configuration, the belt (240) is attached to the bobbin (230) by rotating the bobbin (230) in the direction of the arrow cm>.
To wind it up, turn on the solenoid (SL4), mesh the gear (293) with the gear (253), and turn on the motor (M3).
) is rotated in the direction of arrow (o). At this time, the rotational driving force of the motor (M3) is transmitted from the pulley (282) to the boot 1 bar 284a) and gear (284b) via the timing belt (2BS), and is transmitted to the gears (291a) and (2BS).
91b), (288a), (288b) to gear (
293) to rotate the gear (293) in the direction of arrow (p). The rotation of the gear (293) is caused by the rotation of the gear (255).
a), bobbin gear (232) via (255b)
, is transmitted to the bobbin support shaft (231), and the bobbin (23O)
is rotated in the direction of arrow (m). At this time, gear (2
51) is free, and the bobbin (235) is attached to the belt (2
40) and rotates in accordance with the arrow (m). On the other hand, in order to allow the bobbin (235) to rotate in the direction of the arrow (ffi) and rewind the belt (240) onto the bobbin (235), turn off the solenoid (SL4) and shift the gear (293) to the gear (
251) and drive the motor (M3) in the reverse direction in the direction of the arrow (0°). At this time, the rotational driving force of the motor (M3) is transmitted to the gear (293) according to the above-mentioned path,
The gear (293) is rotated in the direction of arrow (p). The rotation of the gear (293) is transmitted to the bobbin gear (237) and the bobbin support shaft (236) via the gear (251), and rotationally drives the bobbin <235) in the direction of the arrow (, n). At this time, the gear (253) is free and the bobbin (23)
0) is driven to rotate in the direction of the arrow (m') via the belt (240).

By the way, the belt (240) is attached to the bobbin (230), (
235) and when unwinding, simply wind the other bobbin (
235).

When the belt (230'') is driven to rotate, the belt (240) becomes loose.Therefore, in this embodiment, as shown in FIGS.
As shown in the figure, a bobbin support shaft (231). Pulley (233) fixed to the front frame (101) side end of (236)
, (238) is stretched with a belt (257) having a circular cross section, and a resistance force is applied to the driven rotation of the other bobbin (235), (230), thereby effectively fixing the loosening of the belt (240). And so. That is, one bobbin (23
0) is rotationally driven in the direction of the arrow (m), the other bobbin <235> rotates in the direction of the arrow (f) due to the tensile force of the belt (240).
fi゛) direction, but from the pulley (233) to the pulley (238) via the belt (257)
A rotational force in the n) direction is applied, causing a slip between the belt (257) and the pulley (233) or (238), and as a result, an appropriate tension is applied to the bell 1-(240), and the belt ( The same holds true when the bobbin (235) is driven to rotate in the direction of the arrow (m), and the space when winding the belt (240) can be effectively utilized.

The paper conveyed from the intermediate conveyance section (180) is
As will be detailed later, the belt (240) is attached to the bobbin (230).
It is wound up and stored once. At this time, the outer diameter of the belt (240) increases as the paper is accommodated. Therefore, when the motor (M3) is driven at a constant rotation speed, the moving speed of the belt 1- (240) (paper accommodation speed) The paper transport speed also increases, and the difference between the paper transport speed and the paper transport speed at the intermediate transport section (180) gradually increases. In this example, the belt (
The idle roller (240) rotates as the idler roller (240) moves.
The outer peripheral surface of the idle roller (246) is coated with a high-friction member such as a rubber material to ensure the ability of the idle roller (246) to follow the belt, and then the driven rotational speed of the idle roller (246) is detected and transferred to the motor (246). It feeds back to the drive of the belt (240) and controls it so that the moving speed (paper storage speed) of the belt (240) is always constant.

Specifically, as shown in FIGS. 6 and 8, a gear (300) is attached to the end of the spindle (248) of the idle roller (246).
and the support shaft (30) fixed to the front frame (101).
1) is equipped with gears (302a) and (302b) so as to be integrally rotatable, and a support shaft (303) fixed to the front frame (101) has a gear (304a) and a pulse disk <30a.
b) are provided integrally and rotatably. Gear (30
0) meshes with the gear (302g), and the gear (302b) meshes with the gear (304a).

The idle roller (24B) is rotated by its spindle (24B).
8) from gear (300) to gear (302a). (
302b).

(304a) to the pulse disk (304b), causing the disk (3o4b) to rotate. Pulse disk (3
A photosensor (SE7) is installed facing the circumference of the disk (304b), and the rotation speed of the disk (304b) is determined by the photosensor (SE7).
SE7).

In addition, in order to detect the state of winding and unwinding of the belt (240), a transmission type photo sensor (
SE4) is completely installed, and the belt (240) V reaches the overrun mark (241>) as shown in FIG.

(241), a standby mark (242), and an end mark (243) are formed. Each mark (241
). (242).

<243> is formed by painting a transparent belt (240) with black paint on the back side of the unit slightly away from the side edge of the maximum size paper stored in the belt (240),
Sensor (SE4) near the idle roller (246)
Detected in

In other words, as detailed in the control procedure later, the paper refeed unit (
When the power is turned on to the belt (240), the belt (240)
Rewind to the bobbin (235) side (return to initial position)
In this case, the belt (24O) is indicated by the arrow (q゛) in Fig. 9.
When the sensor (SE4.) detects the standby mark (242), the drive of the morph (M3) is stopped. If the standby mark (242) has already passed the sensor (SE4) and the source 7 of the unit (100) is disabled, the next time the t source is turned on, the bobbin (235) will be ) No matter how much I drive in the direction, the standby mark (242) is detected by the sensor (SE4).
This causes a problem in that it cannot be detected. Therefore, in order to eliminate such a problem, in this embodiment, a mark (242) is placed upstream of the standby mark (242) in the belt return direction.
Over run mark (24) with a different pattern from 42)
,). (241) was established. Therefore, the sensor (SE4)
When the standby mark (242) is detected by
Not only does it stop the operation of rewinding the belt (235) to the bobbin (235), it also stops the belt (2
40) starts to return to its initial state, the sensor (S
Overrun mark (241) by E4). (241
) is detected, the return operation of the belt (240) is reliably stopped.

By the way, the width of the standby mark (242), bar rammer (241), (241) can be set to (LO), and the pitch (L2) between the standby mark (242) and overrun mark (241) is set larger than the pitch (Ll) between the overrun marks (241) and (241,). This ensures the identifiability of mark detection by the combination of the 1000 sensor (SE4) and tines.

On the other hand, the end mark (243) is provided on the bobbin (235) side of the bell 1- (240). When the paper is stored, the bell (240) moves in the direction of the arrow (q) and the end mark (243) is detected by the sensor (SE4).
It is determined that the belt (240) has easily accommodated seven sheets of paper. The length L3) of 1 Indian 7-ri (243) is
The copying machine main body (1) is longer than the length in the storage direction of the maximum size paper stored in the belt (240), that is, from the time when the end mark (243) is detected by the sensor (SE4).
When the paper that has already been fed is loaded into the belt (240), the sensor (SE4) marks the end (
243) is set to a length for which detection is still continued.

Next, the switching claw (225) will be explained with reference to FIGS. 2, 6, and 7.

The switching claw (225) is the frame (101,). (111
) is rotatably fixed to a spindle (226) provided between the pulley (227) fixed to the end of the spindle (226), and a pulley (227) fixed to the end of the spindle (211) of the guide roller (210). A belt with a circular cross section (
258) is installed. When the guide roller (210) is rotated in the direction of the arrow (j) during paper storage, the pulley (212), belt (258),
As the pulley (227) rotates, the switching pawl (225) is also urged in the direction of arrow (r), and is held at the solid line position in FIG. 2 by being regulated by a stopper (not shown). Switching claw (225)
At this solid line position, the paper that has been completely conveyed from the guide roller (210) is transferred to the belt (2) by its guide surface (225a).
40) and the scraper (228). On the other hand, when refeeding the paper, the guide roller (210) moves in the direction of the arrow (j'
) direction, the switching claw (
225) is urged in the opposite direction to the arrow (r) through a similar path, is regulated by another stopper (not shown), and is held at the position indicated by the chain double-dashed line, and the paper fed out from the belt (240) is guided to the guide surface (225). At 225a), it is guided to the nip portion between the guide roller (210) and the pinch roller (216).

As described above, when the guide roller (210) is driven to rotate forward and backward in the direction of the arrow (j) or (j'), the belt (
258) and the pulley (212) or (227), and no more stress than necessary will be applied to the switching pawl (225) held at the solid line position or the two-dot chain line position.

The scraper (228) is made of a rigid thin plate,
A flexible resin film (229) is adhered to its surface, and is rotatably held by the switching claw (225) at its upper end. The tip of the film (229) contacts the outer peripheral surface of the bobbin (230) and the bevel 1N- (240) wound there due to the moment due to its own weight, and the belt (24O) moves from the solid line position in FIG. ) is displaced to follow the same thickness of the roll, and guides the paper being stored and the paper being fed out.

(Paper storage operation by storage unit) Paper storage operation is the same in both duplex copy mode and composite copy mode.

In FIG. 2, the conveyance roller (
The paper conveyed in steps 190) and (191) first contacts the guide surface (220a) of the switching claw (220), rotates the switching claw (22O) to the solid line position, and then moves to the guide surface (220a). and the rib-shaped guide portion (201b) of the guide cover (201), and the guide roller (210
) and the pinch roller (215>).The guide roller (210) is driven to rotate normally in the direction of the arrow <j).
The pinch rollers (215) and (216) are driven to rotate. Therefore, the paper is conveyed around the guide roller (210) in the direction of arrow (j), and from between the guide plate (219) and the guide surface (225a) of the switching claw (225) set at the solid line position, It is conveyed downward between the straight portion of the belt (240) connecting the idle roller (246) and the bobbin (23O) and the scraper (228). Solenoid (SL4) is turned on and gear (293) shifts to gear (2).
53), and the leading edge of the paper is connected to the sensor (
After detection by SE2), the motor (
M3) is driven forward in the direction of arrow (0), and the bobbin (23
O) is rotationally driven in the direction of arrow (m). In this way, the paper is wound onto the bobbin (230) together with the belt (240).

After the rear end of the paper is detected by the sensor (SE2), the motor (M3) is turned off at the timing when the paper is completely wound up on the bobbin (230), and the rotation of the bobbin (230) is stopped. The above operation is repeated for the second and subsequent sheets of paper, and the sheets are sequentially wound onto the belt (240).

As described above, stopping the driving of the bobbin (230) every time one sheet of paper is stored and driving the bobbin (230) intermittently is to control the interval between sheets discharged from the copying machine main body (1). The purpose is to make the length as short as possible when stored in the belt (240), to prevent an increase in the winding diameter of the bobbin (230), and to improve storage efficiency and space efficiency.

(Paper refeed section) The refeed/paper section (320) consists of a guide plate (321), a guide frame (325), and a guide plate (3
29), a registration roller (33O>, (331)), and the switching pawl (220).The registration roller (330) is rotatably driven in the direction of the arrow (9) via the clutch (CLI) as described above. (see Figs. 4 and 5), the registration roller (331) is attached to the guide frame (
325) and is rotatably attached to the registration roller (33
0) and rotates as a result. Guide frame (325
) is the support shaft (32) between the frame <101) and (111).
The guide frame (182) and the guide cover (201) are released and then rotated upward to open the paper refeed path.

In addition, a photo sensor (SE3) is installed on the guide plate (321).
is attached via a bracket (322).

In this sensor (SE3), an actuator (323) projects into a conveyance path formed by a guide surface (220b) of a first switching claw (220) and a guide plate (321), and detects a sheet passing through the path.

(Paper refeeding operation) This is an operation in which the sheets of paper wound together with the belt (240) on the bobbin (230) are fed out one by one and fed into the paper refeeding path (40) of the copying machine main body (1), in double-sided copy mode. , and composite copy mode.

After all single-sided copied paper has been wound onto the bobbin (230), when the operator instructs to start refeed copying [turn on the print switch (61), see Figure 10], the solenoid (SL4) ) is turned off and the gear (293
> is engaged with gear (251), motor (M3)
is reversely driven in the direction of the arrow (O゛〉), and the bobbin (235)
is rotated in the direction of the arrow (r, i). As a result, the belt (240) is unwound from the bobbin (230), and the rear end of the stored paper in the storage direction is connected to the stiffness of the paper itself and the film (229) attached to the scraper (228).
The sheet is peeled off from the surface of the belt (240) by the tip of the sheet, and the sheet is fed out from the bobbin (230) with the rear end in the storage direction leading. The paper is transferred to the idle roller (of the belt (240)).
245) and the scraper (22g), the belt (240) is separated from the belt (240) by rapidly changing the moving direction of the belt (240) by the idle roller (245). Furthermore, the paper is placed on the guide plate (21
9) and the guide surface (225a) of the switching claw (225), and the guide roller (210) and the pinch roller (
21t3). At this time, the guide row (210) is driven in the reverse direction in the direction of the arrow (j゛). Therefore, the paper is conveyed around the guide roller (210) in the direction of the arrow (j゛), passes between the guide surface (220b) of the switching claw (220') and the guide plate (321), and passes through the registration roller (330). ). (331) is reached.

The rotation of the registration rollers (330) and (331) is activated by the clutch (CLI) just before the leading edge of the paper in the refeeding direction arrives.
The rotation is stopped by turning on the guide roller (210) and the bobbin (235). Therefore, the leading edge of the paper is moved by the registration rollers (330) and (331).
(7) It collides with the nip and forms a slight loop. When the loop is formed, the clutch (CL2) is turned on to stop the rotation of the guide roller (210), and the motor (M3) is turned off to stop the rotation of the bobbin (235). Control here is performed based on a combination of a paper leading edge detection signal from a sensor (SE3) and a timer.

Next, the clutches (CLi) and (CI, 2) are turned off and the seventh clutch (M3) is turned on, thereby turning on the registration roller (330).

(331) and the guide roller <210) are rotationally driven, and the paper is moved through the guide frame (325) and the guide plate (32).
9), the paper is fed one by one into the refeed path (40) of the copying machine main body (1).The leading edge of the paper collides with the nip of the registration rollers (330>, (331)) which are in a stopped state, and the paper is Forming a loop at the leading end is done for the purpose of correcting the skewed feeding of the paper.To ensure this purpose, 1-distro roller (330).

The conveying force (paper holding force) due to (331) was set to be stronger than the conveying force due to the guide roller (210), pinch rollers (215), and (216).

Thereafter, the paper refeeding operation is repeatedly executed based on the paper refeeding signal from the copying machine main body (1>).

When all the sheets are fed out from the bobbin (230), control is performed to rewind the belt (24O) to the bobbin (235) and set it to the initial state.

(Measures against paper curl) In this embodiment, a reversing means for reversing the front and back sides of the discharge rollers (], 35) and (136) during composite copying is provided in the storage section ( 200) installed on the flow side 1
1. Set the paper winding direction (ffi> on the bobbin (230) in the storage section (200) in the same direction as the rotation direction (a) of the photosensitive drum (10) in the copying machine main body (1). This is the direction of the curl formed on the paper when it is stored in the bobbin (230), and the direction of the curl formed on the paper when it is re-fed and brought into close contact with the photoreceptor drum (10) again. curvature of the photoreceptor drum (10
) to facilitate paper separation from the paper.

That is, in the operation of storing paper in the bobbin (230), the paper is fed into the storage section (200) with the first side (image-formed side) facing right in FIG. 2 in the double-sided copy mode,
It is removed by the belt (240) with the first surface facing inside. At this time, the curl is formed such that the first surface is on the inside. Then, after the paper is re-fed, the blank second surface, which is the outside of the curl, comes into close contact with the photosensitive drum (10), and the image is completely transferred.

On the other hand, in the composite copy mode, the paper is turned over by controlling the forward and reverse rotation of the ejection rollers (135) and (136), and the first side is turned to the left in FIG. 200) and is wound up with the first side facing outward. At this time, the curl is formed such that the first surface is on the outside. Then, after the paper is re-fed, the first side, which is the outside of the curl, comes into close contact with the photosensitive drum (10), and a new image is transferred overlapping the copied image.

In other words, regardless of whether it is in the double-sided lobby mode or composite copy mode, the image forming surface when refeeding paper is the storage section (20
0), the direction of the curl is opposite to the curvature of the photoreceptor drum (10), and the paper can be easily separated from the photoreceptor drum (10). Become.

[Operation Panel] As shown in FIG. 10, the operation panel (60) is installed on the upper front part of the copying machine main body (1), and has a print key (al) for starting the copying operation and a multi-copying operation. Interrupt key (62) for temporarily interrupting the copy operation, Clear/Stop key (63) for temporarily stopping the copy operation or canceling the set number, Den key (64) for setting the number of multi-fubi copies (number set), Copy A 7-segment display (65) for displaying the number of copies and the status of the copying machine, an up/down key (66) for setting copy density,
(67) and its display LED group (68), a paper selection key (69) for selecting the paper size, and a paper size display LED group (70) for displaying the selected paper size.
, a group of magnification selection keys (71) for selecting the copy magnification;
Magnification display LED group to display the selected magnification D group (72), copy mode selection key (73) to select each copy mode of 1-sided, 2-sided, and composite copy mode, ED to display 1-sided copy mode (74) , Duplex copy mode display LED (75), Composite copy mode display LED (7
6) is provided.

[Control circuit Fig. 11 shows the control circuit of the copying machine in part 12 and the copying machine body (1).
), and a second micro combination coater (90) to control the operation of the paper refeed unit) (100). There is.

In the CPU (80), the switch matrix (80)
1), display section (65), various display LEDs (68). (7
0).

(72), (74)', (75), (76) are
: Connected via J-da (82>).The switch matrix is connected to the operation panel (6O), each key (61>~
(64), (66), (67), (69). (71
).

In addition to the built-in switches (73), the paper size and paper presence/absence detection sensor (Psi), (PS2), and attachment/detachment detection switch (MS) for the paper refeeding unit (100) are configured. Further, the output boat of the CPU (80) is connected to a main motor (Ml), a developing motor (M2), a timing clutch, a paper feed clutch, a charging processor, a transfer charger, and the like.

c p U (90) has paper detection sensors (SEX), (SF2), (SF3) and belt <24 at its input terminals.
The mark detection sensor (SF4) of O), the opening/closing detection sensor (SF5) of the guide cover (201), and the forced ejection switch (SW) are connected to the output terminal of the solenoid that drives the paper conveyance system. (SLI) ~ (SL5)
, clutch (CLI), (a, 2) are connected.

The motor (M) that drives the bobbins (230) and (235)
S) is a circuit (Ql,
), (02).

(Q3), the rotation speed of the idle roller (246) is controlled by a pulse disk (3041).
3) A signal from the sensor (SF7> detected through 17° and a speed signal from either the output terminal (Pl) or (P2) are input. The terminal (Pl) drives the bobbin (235). The terminal (P2) outputs a speed signal for driving the bobbin (230).

Each of these signals is converted into a voltage value within the circuit (Ql),
It is output to the circuit (Q2). On the other hand, the circuit (Q3) outputs a reference waveform voltage for the pulse disk (304b) to maintain a constant rotation speed of ~. to the circuit (Q2). Circuit (Q2
) compares the voltage values from the circuits (Ql) and (Q3) to form an appropriate waveform voltage and outputs it to the motor (H3). In addition, a belt (24
The moving speed of 0) is set slightly higher than the paper transport speed when storing paper, and is set slightly lower when refeeding paper.

CPUs (80) and (90) can communicate with each other. Information set using various keys on the operation panel (60) is transmitted from the CPU (80) to the CPU (9O). The CPU (90) transmits, to the CPU (80), a signal indicating that the number of copies of paper has been accommodated, a wait signal for waiting for a copy operation, and the like. Although omitted in FIG. 11, the CPU (80) has a document scanning optical system (20).
) is also connected to another CPU that controls the controller (400), and when a saw (400) is installed, it is also connected to its control CPU.

[Control Procedure] Next, the control procedure of the copying machine main body (1) and paper refeeding unit (100) executed by the CPUs (80) and (90) will be described in detail with reference to FIG. 12 et seq. . By the way, in the following explanation, on-edge means that a switch, sensor, signal, etc. switches from an off state to an on state, and off-edge means that a switch, sensor, signal, etc. switches from an on state to an off state. means.

(Description of Flags and Signals) Here, various flags and signals that are misused in the following control procedure will be explained in advance.

Jam flag: Displays that a jam has occurred within the copying machine main body (1) and within the paper refeed unit (100). C
In the control at P U (80), step (512
) is set when the occurrence of a jam is detected in the jam detection/processing subroutine, and is reset when the jammed paper removal process is confirmed. In the control of the CPU (90), it is set when the occurrence of a jam is detected [see step (5384)], and reset when the jam processing is completed [see step (5392)].

Jam A flag: When the power is turned on to the paper refeeding unit <100), it is displayed that there is paper left in the storage unit (200) that the previous operator forgot to take [set in step (5234), step (5392).

(5412)].

Jam B flag: Indicates that a jam has occurred during paper transport in the paper refeeding unit (100) [steps (5374), (5376), (5378), (
5381) and reset in step (5392)].

Copy flag: Displays that the copying machine main body (1) is in the process of copying [set in step (598), reset in steps (Sill), (5116), (5120)].

Single-sided mode flag 2 Instructs execution in single-sided copy mode [Set in steps (523) and (530), reset in step (527).

Double-sided mode flag 2 Instructs execution of first side copy in double-sided copy mode [set in step (S27), reset in steps (523) and (529)].

Composite mode flag: Instructs execution of first side copy in composite copy mode [Set in step (S29), reset in steps (523) and (530).

Overprint paper flag 2 Instructs to feed paper from the upper cassette (30) [Set in steps (546) and (5412),
Reset in steps (545) and (5116).

Sketch paper flag: Instructs to feed paper from the lower cassette (32) [Set at step <545, set at step (54)
5), (Reset at S116>.

Paper refeed flag: Displays that the copy process is for paper refed from the paper refeed unit (100) [Set in step (S116), set in step (5120)
), (5366), <5407).

Empty signal: Paper cassette (30), (32)
[Step (SS
S) to set, and step (551) to reset.

Stop flag: Instructs to temporarily stop the subsequent copy operation during the copy operation [step (553>,
(566), (set at 51015, step (5
5g).

(564), (596) to reset].

Determined Flag 2 When duplex or composite copy mode is selected, the number of copies per 17 originals (C number) and storage unit (200
) with the number of sheets that can be accommodated (N).
Set in step (S80), step (574),
(S83) to reset].

Copy operation permission flag: ': Indicates that JBee operation is possible without any problems. In particular, it is reset when the number of sheets that can be accommodated (N) is the set number, and the copy operation is prohibited [set in step (579), set in step (5
80) and reset.

Paper feed prohibition signal: Displays that the belt (240) has been wound up to the end on the bobbin (230), and prohibits and allows subsequent operations [Set at step (5303), set at step <5116), (5412) reset].

Paper feed wait signal: Displays 17 that the paper refeeding unit (100) is not ready to accommodate paper, prohibits paper feeding operation [Set in step (5227), step (
5249), reset with (5255)].

Paper presence signal: Set when the number of sheets (number of copies) is stored in the storage section (200) [step (
5310): ], is reset when all the sheets are ejected from the storage unit (200) [step (530B)
), (5363), (5412) ].

Pre-processing flag: ':ff Instructs to return the belt (240) in the paper refeeding unit (100) to the initial position at the start of the bee operation [Set in step (5223),
Reset at steps (5249) and (5255).

Standby flag: Indicates that the belt (240) has returned to its initial position [step (5249).

(5255) to set, step (5310) to reset].

Drive request signal: Main motor (M
l) [Step (S227), (5
293).

(5323), (5407) set, step (5
249), (5255n, (5310), (532
9), reset code at (5409).

Winding flag: When returning the belt (240) to the initial position, standby mark (242), over
Display that the run mark (241) has been detected by the sensor (SE4) [steps (5246), (525
2), set at (5254), step (S249)
, (5255)].

Position A flag: Region (L2) of belt (240) is located at the detection point of sensor (SE4). - is displayed [set in step (S246>, step (524)
9) 1 rusetsutoko.

Position B flag: Displays that the area (Ll) of the belt (240) is located at the detection point of the sensor (SE4) [Set in step (S252>, (S254>), reset in step (5255) ].

Main body ejection signal: Displays that paper has been detected by the paper detection sensor provided near the ejection rollers (38) and (39) of the copying machine main body (1).

Paper refeeding operation: Displays that the paper is being refeeded [step < 5323), step (
5329), reset with (5363)].

Conveyance permission signal: Permits paper to be sent out from the paper refeeding section (320).

Ejection flag: Operator stores paper in storage section (200)
[Set in step (5407), step (541
Reset with 2>.

(Control of copying machine body) FIG. 12 shows the main routine of the CPU (80).

When the CPU (80) is powered on, the step (S
l), the random access memory (R
Clear AM), initialize registers, timers, power/monitors, etc., and make initial settings to set each device to its initial mode. Next, in step (S2>) the CPU (9
0), etc., and when the end of the initial communication is confirmed in step (S3), an internal timer is started in step (S4). The knee internal timer determines the time required for the main routine, and also functions as a criterion for determining the end of counting of each timer that can be used in the following subroutines.

Next, in step (S5), it is determined whether the Jihe Muflag is 10'' or not. If it is set to "1", the process immediately moves to step (S12), and if it is reset to '0', the subroutines of steps (S6) to (513) are sequentially called.

In step (S6), input of the number of copies (number of copies per M manuscript) set using the tin key (64) is accepted. In step (S7), input of the copy mode (single-sided, double-sided, composite) set by switch <73> is accepted. In step (S8), the input of the paper size set by switch (69) is accepted. Step (S9)
Now, accept the clear/stop input from the switch (63). In step (510), when the duplex or composite copy mode is selected, it is determined whether or not the set number of sheets (number of copies) can be stored in the paper refeeding unit (100), and the copying operation is performed. Decide whether to allow it or not.

In step (511), a copy operation under the selected copy condition is processed. In step (512), a jam within the copying machine body (1) is detected. in particular,
The jam timer set in step (511) is determined, and if occurrence of a jam is detected, the jam flag is set to "1", and thereafter, removal of the shirt and paper is determined, and the apparatus is reset to a copyable state. In step (S13), C
Processes communication with PU (90) etc.

After calling each of the above pear routines, step (514
), wait for the internal timer to finish counting, and then proceed to step (S4).
).

FIG. 13 shows a copy mode setting routine that can be executed in step (S7) of the main routine of the CPU (80).

Here, first in step (521) the copy flag is set to "
After confirming that the refeeding unit (100) is reset to 1-0, it is determined in step (522) whether or not the paper refeeding unit (100) is installed based on the on/off signal from the microswitch (MS). . If it is not attached, in step (523) the LED (74) is turned on and the single-sided mode flag is set to rl, and the LEDs (75) and (76
) is turned off, and the duplex mode flag and composite mode flag are reset to "O", and this subroutine ends. On the other hand, if it is attached, step (524)
In step S25, it is determined whether the selection switch (73) is on-edge or not, and whether the paper refeed flag is r□.

If both are YES, that is, the copying machine main body (1) is not in the copying operation [YES in step (521)], and the selection switch Each time (73) is turned on, steps (526) and subsequent steps are executed to switch the copy mode.

The copy mode is initially set to one-sided copy mode, and can then be switched to duplex, composite, or one-sided in rotation.

That is, in step (526), the single-sided mode flag is set to rl.
, and if it is set to "1", turn off the LED (74) in step (527), and turn off the LED (75).
At the same time, the single-sided mode flag is reset to "0" and the double-sided mode flag is set to "rl".

When the single-sided mode flag is reset to "O", the double-sided mode flag is set to rl in step <528).

If it is set to "1", the LED (75) is turned off in step (S29), and the LED (
76), resets the duplex mode flag to r□, and sets the composite mode flag to "1".

When both the single-sided mode flag and the double-sided mode flag are reset to "rO", the LED
(76) is turned off, LED (74) is turned on, the composite mode flag is reset to "0", and the single-sided mode flag is set to "11".

FIG. 14a, No. '14 bryJ shows a paper selection subroutine that can be executed in step (S8) of the main routine of the CPU (80).

First, in step (541), it is determined whether or not the paper refeed flag is "rO", and if it is reset to %'OJ, then in step (542), it is confirmed that the copy flag is reset to "0". In step (543), it is determined whether the selection switch (69) is on-edge or not, and if it is on-edge, overlay paper or underprint paper is alternately set. That is, if it is determined that the overprint paper flag is "1." in step (544), the overprint paper flag is reset to "10" and the underprint paper flag is set to "1." in step (545). If it is determined that the top picture paper flag is "O" in (S44), the bottom picture paper flag is set to "0" in step (546).
” and set the overprint paper flag to “1.”.

Thereafter, the size of paper stored in the paper feed section selected in step (548) is displayed on the LED group (70).

Step (542).

This step (54) also applies when it is determined No in (543).
8) Process.

On the other hand, the paper refeed flag is set to "1" in step (541).
If it is determined that this is the case, the copy process is to be performed by refeeding paper, so in step (547), the paper size for copying the first side is substituted as the paper size for copying the second side, and the process proceeds to step (548). do.

Next, in step (549) it is determined whether the empty signal is off-edge, and if it is off-edge, that is, it is not the timing when paper has been replenished, then in step (550) it is determined whether there is no paper in the currently selected paper source. Determine whether or not. If there is paper, the empty signal is reset to "0" in step (551). On the other hand, if there is no paper, step (552)
It is determined whether the copy flag is "1" or not. If it is set to "1" (if a copy operation is in progress), the stop flag is set to "1" in step (553) to instruct a temporary stop of the subsequent copy operation, and step (554)
The number of copies set (the number of copies that are incorrectly set) is stored in the RAMI. Furthermore, in step (S55), the empty signal is set to "1".

If it is determined in the step (S49) that the empty signal is on-edge, that is, if paper is replenished, the original number stored in the step (554) is again substituted for the set number. Further, in step (557), the number of copies missing at this time is calculated, and in step (55B), the stop flag is reset to r□, allowing the copying operation to be resumed.

Figure 15 shows the clear/stop switch (63) that can be executed in step (S9) of the main routine of the CPU (80).
) shows the subroutine that determines the status of

The clear/stop switch (63) has the following functions.

(1) When copying is not in progress, Initializes copy conditions each time it is turned on.

(2) When copying is in progress, i) When turned on for the first time, subsequent copy operations are interrupted.

i) At the second turn on, the Nicoby condition is initialized.

i) When the print switch (61) is turned on after being turned on for the first time, the copying operation is restarted.

(3) In duplex or composite copy mode, if there is no paper in the paper feed section during bee operation, if you turn it on once with no paper in the paper feed section, the second copy mode will be activated. Set to .

i) Paper is replenished in the paper feed section and the print switch (61
) is turned on, the first side copying operation is restarted.

Therefore, in this subroutine, when it is confirmed in step (561) that the switch (63) is on, it is determined in step (562) whether or not the stop flag is "1". If set to "1", step (563)
If it is determined that the copy flag is r□, that is, if it is thrown during the copy operation, the stop flag is reset to r□ in step S(34), and the copy conditions are initialized in step S68>. do.

When the stop flag is "0" [NO3 in step (562), and if it is determined in step (565) that the copy flag is "0", the step (568) is processed. If the copy flag is set to "1", that is,
If a copy operation is in progress, the stop flag is set to "1" in step (S66), and the number of copies (number of copies) set at that time is stored in the RAM in step (S67).

FIG. 16 shows a subroutine for determining permission for the "-1 bee operation" which is executed in step (510) of the main routine of the CPU (80).

Here, it is determined whether or not the storage unit (200) can receive the number of sheets set when the duplex or composite copy mode is selected.

When it is determined in step (571) that a copy operation is not in progress (the copy flag is "rO"), the following steps are processed. In step (572), it is determined whether the single-sided mode flag is r□, and in step (573), it is determined whether the paper refeed flag is r□, and if either is r1. If it is set to
That is, if the single-sided copy mode has been selected or has already moved to the paper refeed copy operation, the determined flag is reset to "0" in step (574), and step (57
9) sets the copy operation permission flag to rl.

On the other hand, if YES in both steps (572) and (573), that is, the duplex or composite copy mode is selected and the copying operation to the first side has not yet started, the determined flag is flagged in step (575). It is determined whether or not is "0". “If it has been reset to 0., step (576
) Calculate the length (L5) of the paper selected in the transport direction,
In step (577), the number of sheets (N) that can be stored in the storage unit (200) is calculated using the following formula.

N-L4/ (L5+L6) ・
...■L4: Effective length of belt (240) [distance from standby mark (242) to end mark (243)] L5: Length in conveying direction of stored paper L6: Toward belt (240) The information in (L4) and (L6) is the interval between sheets when storing sheets in step (S2).
The data is sent from the CPU (90) to the CPU (80).

Next, in step (578), the number of sheets that can be accommodated (N) calculated using the formula 0 and the number of copies (number of copies) are compared, and N
If the number is ≧, the copy operation permission flag is set to "1" in step <579). If N<the number, the copy operation permission flag is reset to "0" in step (580), and the copy operation is prohibited, and the determined flag is set to "1.".

Furthermore, even if the second judgment has been completed, if the number and paper size have been changed, the above judgment is repeated again. That is,
If it is determined that the determined flag is "1" in step (575), it is determined in step (ssi) whether or not the number has been changed, and in step (582) it is determined whether or not the paper size has been changed. If YES, step (5
83'), the determined plug is reset to "0".

17a and 17b show the copy operation subroutine executed at step (Sll>) of the main routine of the CPU (80).

First, in step (591) it is determined whether the copy flag is r□, and if it is reset to r□, that is, if copying is not in progress, the print switch (61) is turned on in step (S9Z).・When the error is detected, check that the copy operation permission flag is set to "1" in step (593) and that the empty signal is reset to "0" in step (594). In step (595), it is determined whether the strike knob flag is "1" or not. If the stop knob flag is set to "1", the stop flag is set to "1" in step (S96).
In step (597), substitute the original value stored in the numeric value, and in step (59B) set the -copy flag to 11.Step (595)
When it is determined that the stop flag is r□, step (598) is immediately processed.

Next, in step (599), it is determined whether the copy flag is "IJ or not. If it is reset to rOJ, the process immediately moves to step (S108).'1". stoo), it is determined whether the paper feed prohibition signal is "1" or not. If it is set to "1", it means that a trouble has occurred in the paper refeeding unit (100).
In step (5101), the stop flag is set to "1", and in step (5105), the paper feeding operation is stopped after the feeding of the paper currently being fed is completed. Master, Ste Nobu (5
100), when it is determined that the paper feed prohibition signal is rOJ,
In step (51, 02), it is determined whether the stop flag is "11" or not, and if it is set to "1", step (51,02) is performed.
105)t-%
6) When the completion of paper feeding is confirmed, step (S
In step 107), the number of sheets fed up to now is substituted into the set number, and the process moves to step (S108), -5.

On the other hand, in the step (5102), the stop flag is set to "
If it is determined that the paper feed weight signal is r□, it is determined in step (5103), and if it is reset to r□, then in step (5104)
- Execute the paper feeding operation from (30) or (32) and move to step (5108). Paper feed wait signal is rl
”, the process immediately moves to step (S108).

Next, in step (5108), a copying operation and a paper transporting operation are performed to form an image on the fed paper. After that, in step (5109), the single-sided mode flag is set to "1".
”, and if it is set to ``1'', that is, if the copy process is in single-sided copy mode, it is determined in step (5110) whether or not the specified number of copies have been completed. If the determination is completed, the copy flag is reset to r□ in step (Sill), and this subroutine ends.

If it is determined in step (S109) that the single-sided mode flag is r□, that is, if copy processing is in progress in duplex or composite copy mode, it is determined in step (5112) whether the paper refeed plug is r□. Determine. If it is reset to "0", that is, when copying to the first side,
In step (5113'), it is confirmed that the specified number of copies have been completed, and in step (5114) it is determined whether or not the paper presence signal is on-edge. If it is on/on, that is, when the specified number of sheets are stored in the storage section (200), the paper size of the selected paper source and mode is set to R in step (5115).
Store in AM. Furthermore, in step (S116), the upper paper feed flag and the lower paper feed flag are reset to "0", the paper refeed flag is set to rj, and the copy flag and paper feed prohibition signal are reset to r3, respectively. and ends this subroutine.

On the other hand, in the step (5112), the paper refeed flag is set to "1".
．． If it is determined that it is J, that is, when copying to the second side, Nobuo with paper is “0” in step (5117).
” is reset.

If it is reset to "0", that is, the housing section (200
), if the last sheet has been re-fed from step (51
After confirming the completion of copying to the final paper in step 18), in step <5119), the flag of the paper feed unit whose memory is already erroneous is set to "1". Finally, in step (5120), the paper refeed flag and copy flag are reset to "0", and this subroutine is ended.

(Control of paper refeed unit) FIG. 18 shows the main routine of the CPU (90).

When the cr ty (90) is powered on, it is reset in step (6201), clearing the random access memory (RAM), initializing registers, timers, counters, etc., and setting each device to the initial mode. Perform initial settings. Next, in step (5202)
Execute initial communication with PU (80) and proceed to step (5203
), when the end of the initial communication is confirmed, step <520
4) Start the internal timer. This internal timer has the same function as that of the main routine of the CPU (80).

Next, in step (5205), the jam flag is r□.

Determine whether or not. If it is set to "1", the process immediately moves to step (5209''), and if it is reset to "0", each subroutine of steps (5206) to (5209') is called.

In step (5206), the operation of returning the belt (24O) to the initial position is processed before the copying machine main body (1) starts the paper feeding operation. In step (5207), the operation of discharging the paper to the paper discharge tray (175) or the sorter (400) and the operation of storing the paper in the storage unit (ZOO) are processed. In step (5208), the operation of refeeding sheets one by one from the storage unit (200) is processed. In step (5209), a jam in the paper refeeding unit (100) is detected and handled.

After calling each of the above subroutines, step (52
10), wait for the internal timer to finish counting, and then step (
5204).

On the other hand, if there is an interrupt request from the CPU (80) during processing by the CPU (90), the CPU
Processes communication with U (80).

FIG. 19 shows a preprocessing subroutine executed in step (5206) of the main routine of the CPU (90).

Here, first, in step (5221), it is determined whether the copy flag is "1" or not. If it is reset to "rO", the process moves to step (5225), and if it is set to '1', step (5222 ) to determine whether the paper presence signal is off-edge. If it is off-edge, the storage part (ZO
It is assumed that the paper refeeding operation from step (O) has been completed, and step (
5223), the preprocessing flag is set to ``11'', and if the 0 paper presence signal to proceed to step (5225) is not off-edge, the preprocessing flag is set to ``11'' in step (5224').
1. It is determined whether or not, and if it is set to "1", the process moves to step (5205), and if it is reset to '0', the process moves to step (5231).

At step (5225”), the standby flag is r□,
Determine whether or not. If it is set to "1", the belt <240) has already been rewound to the initial position, so
The process immediately moves to step (5231). If the standby flag has been reset to "0", step (52
After confirming that the drive request signal has been reset to "0" in step (5227'), the drive request signal and paper feed wait signal are set to "1", and the motor (M
3) is driven in the belt rewinding direction. At the same time, the state counter used in the following step (5230) is reset to r□, and timer A and trouble timer are started. Here, the bobbin (235) is indicated by the arrow (ffi
) direction, and the belt (240) is driven one rotation in the direction of the bobbin (
235), the timer A will be explained in the subroutine of step (5230) (see FIG. 20). ) - The rubble timer is for detecting a trouble in which the belt (240) does not move within a predetermined time when the motor (M3) is driven.

Next, in step (522B>, it is determined whether the winding flag is on-edge or not, and if it is on-edge, the belt (240
) standby mark (242) or overrun mark (241) was detected by the sensor (SE4),
In step (5229), the solenoid (Sn4), (S
n2> is turned on, the motor (M3) is driven in the belt winding direction, and the trouble timer is started.

With this, the bobbin (230) is rotationally driven in the direction of the arrow (m), and the belt (240) is wound onto the bobbin (230), and in step (5230) the belt (240) is moved to the initial position. Execute the process to overrun and stop.

Next, in step (5231) it is determined whether the paper refeed flag is "1". If it is set to "1", then in step (5232) the paper is transferred to the storage section (200) according to the operator's selection. Process to forcefully discharge the waste.

If the paper refeed flag has been reset to r□, it is determined in step (5233) whether the sensor (SE3) is turned on. If the sensor (SE3) is turned on, it is determined that the paper presence signal has been reset because the power was turned off before or during copy processing to the second copy process, and the paper jam signal is detected in step (5234). Set the A flag to "1".

FIG. 20 shows the belt in the initial position, which is carried out in step (5230) during the preprocessing in step (5206).
, indicates the stop-start process.

This subroutine takes step (5227) during preprocessing.
, (5229) executes control to turn off the driven motor (M3). The values of timers A and B used here are set under the following conditions.

Timer A>L2/V ・・・・・・■
Timer A>Timer B>Ll, /V...
・■■: Belt (240) movement speed L1 pitch of Niover run mark (241) L2 standby mark (242) and over run mark (2
41) The stopping process here is performed in step (5241) when the sensor (
When SE4') detects Mahek (241), (242) and goes on-edge, step (5242)
increments the state counter with step (
5243), check the value of the state counter 17,
The following control is executed based on the value.

When the value of the state counter is IIT, that is, after the motor (M3) is completely driven in the belt rewinding direction, the sensor (
When the first on-edge of SE4) is detected, it is determined in step (5244) whether the take-up plug is rO.
In step 5), it is determined whether timer A has finished counting. If the count is completed, the sensor (S
E4) The position is downstream from the standby mark (242) in the rewinding direction [area (L4)
It can be determined that it was within the range of In other words, the point where the first edge of sensor (SE4) is detected can be determined to be the standby mark (242), and step (
5246) to turn off the motor (M3) and turn off the winding flag.
Set the position A plug to rl, and reset the state counter to 'O''.

If timer A has not finished counting, the belt (2
40) facing the detection point of the sensor (SE4) can be determined to be region (L2) or downstream of region (L2) in the rewinding direction, and timer B is started in step (5247).

Next, in step (S244), the winding plug is r I
If it is determined that it is J, the position ft is determined in step (5248>)
After confirming that the A flag is set to "1", the motor (M3) is turned off in step (S249).

As a result, the rewinding operation of the bell 1- (240) is stopped and lowered. At the same time, reset the winding flag and position A flag to "0", set the standby flag to r I J, and reset the state counter to 0". Also, turn off the solenoids (SL4) and (SLY). Then, the drive request signal, paper feed wait signal, and preprocessing flag are reset to "0".

After starting timer B in step (5247), if the value of the state counter becomes "2", that is, if the second on-edge of the sensor (SE4) is detected,
In step (5250), the winding plug is r□.

After confirming that it has been reset to
251,), it is determined whether timer B has finished counting. If the count is completed, the sensor (SE
Wait for the third on-edge in step 4), and if the count has not finished, it can be determined that the position where the belt (240) was facing the detection point of the sensor (5E4) was in the area (L2), and step ( S252) is turned off.

With this, the rewinding operation 12 of the belt (240) is stopped.

At the same time, the winding flag and position B flag are set to rl, and the state counter is reset to 0''.

After determining that timer B has finished counting in the step (5251), if the value of the state counter reaches 3'', that is, if the third on-edge of the sensor (SE4) is detected, the process proceeds to step (5253). and the winding flag is r
Determine whether it is OJ or not. If it is reset to "0", turn off the motor (M3) in step (5254),
Set the winding flag and position B flag to "1" and reset the state counter to '0'.On the other hand, if the winding flag is set to rl, step ($255
) to turn off the motor (M3), solenoid (SL4),
(SL5) is turned off, the winding flag and the position B plug are reset to r□, and the standby flag is set to "1". Reset the paper feed wait signal and preprocessing flag to "0".

FIG. 21 shows a subroutine of the ejection/accommodation operation executed in step (5207) of the main routine of the CPU (90).

Here, in step (5281), whether the single-sided mode flag is "rl" or not, in step (5282) whether the paper refeed flag is "1", and in step (5284) whether the duplex mode flag is "1" or not. The following processing is performed according to the copy mode being processed at that time.

When copying one side [YES at step (5281)], when copying the second side in duplex or composite copy mode [step (5281)]
5282)], when copying the first side in the 0-sided lobby mode where the paper is ejected straight to the output tray (175) or sorter (400) in step (5283) [YES in step (5284)] The step (
5285) to directly convey the paper to the storage section (200"),
In step (5287), the paper is stored in the storage section (200).

When copying the first side in composite copy mode [step <52
If No in B4), in step (5286) the paper is switched back by the ejection rollers (135) and (136) to turn the paper upside down and then transported to the storage unit (200).
In step (5287), the paper is stored in the storage section (200).

In addition, step (5283), ($285), <5
The details of the control procedure in step 286) will be omitted.

FIGS. 22a and 22b show the subroutine of the containment operation executed in step (52B?).

First, in step (5291), it is determined whether the copy flag is "1" or not. When the on-edge of the main body ejection signal is confirmed, that is, when the leading edge of the copied paper reaches the ejection section of the copying machine main body (1), the drive request signal is set to "1" in step (5293). . Next, step (5)
294), when the on-edge of the sensor (SE2) is confirmed, that is, the paper sent to the paper refeeding unit (100) is directly transferred from the switching claw (12S) to the intermediate conveyance section (180).
(during double-sided copy mode), or after being switched back and reversed by the ejection rollers (135) and (136), the sheet is transported to the intermediate conveying section (180) (during composite copy mode), and the sheet is When the tip reaches the detection point of the sensor (SE2), the solenoids (SL4) and (SL5) are turned on in step (5295), and the motor (M3) is turned on.
The timer C1 and the jam timer A, which determine the drive start timing of the timer C1, are started. Now the guide roller (210)
is rotationally driven in the direction of arrow (j), and motor (M3
), the bobbin (230) is ready to be driven.

Next, when it is confirmed in step (5296) that the timer C has finished running, in step (5297) the motor (
A trouble timer is started to confirm that the motor (M3) is being driven normally, the motor (M3) is driven in the winding direction, and the timer C is reset. After that, in step (529g), when the off-edge of the sensor (SE2) is confirmed, that is, the trailing edge of the paper is
When detected in step 2), in step (5299), a timer D that determines the off timing of the motor (M3) is started, the jam timer A is reset, and a storage counter is incremented.

The storage counter is for counting the number of sheets stored in the storage section (200).

During this process, the paper is transported by guide rollers (210), pinch rollers (215), (216) and belt (240).
), guided by the scraper (228) and shown by the arrow (m>
direction (belt (240) to rotating bobbin (230)
Then, the step (5300
), when it is confirmed that the timer D has finished counting, the motor (M3) is turned off in step (5301) and the timer D is turned off.
Reset. Further, in step (5302), it is determined whether the sensor (SE4) is on-edge or not. If it is on-edge, at that point the sensor (SE4)
) (7) Detect the end mark (243) and remove the belt (
240) is wound up to the terminal end, and in step (5303), the paper feeding prohibition signal is set to "rl", thereby preventing the subsequent paper feeding operation.

Next, in step (5304) it is determined whether the stop flag is off-edge, and in step (5305) it is determined whether the empty signal is off-edge. YES to both
If so, the solenoid (Sn2
), (Sn5) is turned on, the paper presence signal is reset to "0", and the process moves to step (5309). If the stop flag is not off-edge, the process moves to step (5309). If the empty signal is not an off-edge, it is determined in step (5306) whether the copy flag is ``1'', and if it is set to ``1'', after the clear/stop switch (63> is turned on once) , it is determined that the copy operation has been restarted, the step (5308) is executed, and the process moves to step (5309).If the copy flag is reset to 10'', it is assumed that the previous copy condition has been canceled. Then, in step ($307), it is determined whether the count value of the accommodation counter is 1"' or more. If the count value is "1" or more, step (531
0), ($311), and then the accommodation counter is reset to "0" in step (5312). Count value is O
If “′, this subroutine ends immediately.

Executing copy operation to the first side, step (5309)
When it is determined that the count value of the accommodation counter has become equal to the set number, the solenoid (Sn2
), (Sn5) is turned off, the drive request signal is reset to "0", the paper presence signal is set to "1", and the standby flag is reset to r□. In addition, step ($
After confirming that the stop flag has been reset to rO in step 311), the accommodation counter is reset to O'' in step 5312, and this subroutine ends.

Figures 23a, 23b, and 23e are CPU (90)
A subroutine for paper refeeding operation that can be executed in step (5208) of the main routine is shown.

First, in step (5321), it is determined whether the paper refeed flag is rl, and if it is reset to "0", this subroutine is immediately terminated. If it is set to "1", it is determined in step (5322) whether the copy flag is on-edge, and if it is on-edge, step ($323) is set.
), set the paper refeeding flag and drive request flag to "1", reset the state counter to r□, and proceed to step (5325). After that, proceed to step (5324)
After determining that the paper refeeding flag is "1" in step (5325), the process moves to step (5325). In step ($325), the count/value of the state counter is checked, and depending on the count value, the motor (M3), clutch (CL),
), (CL, ), etc. In the initial stage when the current counter of the current state counter is reset to "0", it is determined in step (5326) whether the transport permission signal is "1" or not. If it is reset to r□, the process moves to step (5360), and if it is set to "1",
In step (5327), it is determined whether the stop flag is r□. If it is reset to "0", paper re-feeding is prepared for the first time. That is, in step (5328), timer F, which determines the interval between sheets to be re-fed, is started, and the state counter is set to "1". If the stop flag is set to rIJ, in order to temporarily stop the paper refeeding operation, the copy flag, paper refeeding flag, and drive request flag are reset to r□ in step (5329).
Turn off the motor (M3).

When the count value of the state counter is "1", it is determined in step (5330) whether the transport permission signal is "1" or not, and if it is set to "1", step (5331) is performed.
The count of the timer F is continued at step (53).
32) drives the motor (M3) in the rewinding direction, turns off the clutch (CLI), turns on the clutch (CL2),
The jam B timer for detecting the occurrence of a jam in the paper refeeding section (320) is started, and the state counter is set to '2'.
’. With this I-Dystrora (330)
, (331) are stopped, and the guide roller (210) is reversely driven in the direction of the arrow (jo), and the paper begins to be fed out from the bobbin (230).

If it is determined that the transport permission signal is "0" in the step (5330), the timer F is set in the step (5333).
The count is temporarily stopped.

When the count value of the state counter is 2", it is determined in step <5334) whether the transport permission signal is "1",
If it is set to '1°', the steering knob (S335
), the timer F5 continues counting the jam timer B, and in step (5336), the flag (CLI) is turned off and the motor (M3) continues to be driven in the rewinding direction -7, and the process proceeds to step (5339). Transition. If the transport permission signal is reset to r□, step (53
37), the counts of the timer F and jam timer B are temporarily stopped, and in step (S338), the clutch (e
ll) to stop the guide roller (210) from reversing, turn off the motor (M3), and proceed to step (5339).
Move to.

Next, when it is confirmed in step (5339) that the sensor (SE3) is on-edge, that is, when the leading edge of the paper fed out from the bobbin (230) is detected by the sensor (SE3), step (5340) is performed. Reset the jam timer B with I/C, start a new jam timer C and timer G for determining the paper loop amount just before the registration rollers (330) and (331), and set the state counter to 3". do.

When the count end of the state counter is 3', it is determined in step (5341) whether the transport permission signal is "1" or not, and if it is set to '1', step 7 (5342) is set.
), the timer F1 timer G and jam timer C continue counting, and in step (5343), the timer F1, timer G, and jam timer C continue counting.
LI) is in the off state and the motor (M3) is driven in the rewinding direction! ! Allow the process to continue and move on to step (5346).

If the transport permission signal has been reset to "r'0", the counts of the timer F, timer G, and jam timer C are temporarily stopped in step (5344), and the step knob (5344) is reset.
345), turn on the clutch (CLI) and turn on the motor (M3
) is turned off and the process moves to step (S346). next,
When it is confirmed in step (5346) that the count of timer G has ended, in step (5347) the clutch (CI, 1
) is turned on, the motor (M3) is turned off, and the state counter is set to 4". With this, the operation of feeding the paper from the bobbin (230) is temporarily stopped, and the leading edge of the paper is moved to the registration roller (330), ( 331), and a slight loop is formed.

When the count f of the state counter is "4", it is determined in step (5348) whether the transport permission signal is "1", and if it is set to "1", the step (S349) is performed.
), the count of the timer 7F and the jam timer C is continued and the process moves to step (5351). If the count has been reset to "0", the count of the timer F and the jam timer C is continued in the step (5350). Once the stop knob is turned on, the process moves to step (5351). Next, step (5
When it is confirmed in step 351) that the timer F has finished counting, in step 5352 the motor (M3) is restarted in the rewinding direction (7), and
), (CI2) is turned off and the state counter is set to “5”.
”.

With this, the guide roller (210) is reversed in the direction of the arrow (j゛), and the registration roller (330), (
331) is driven, and the paper is sent out from the paper refeeding section (320).

When the count value of the state counter is 5", it is determined in step (5353) whether the transport permission signal is "1",
rl'', the jam timer C continues counting in step (5354), and the count is continued in step (5354).
At step 355), the motor (M3) is driven in the rewinding direction and the clutches (CLI) and (CI2) are kept off, and the process moves to step (5358). If the transport permission signal is reset to "0", step (5356
) to stop the count of the jam timer C by -, and in step (5357) to turn off the motor (M3),
Turn on the clutch (C1l>, (CI2) and proceed to step (535B) 1st, step (5358)
) when the off-edge of the sensor (SE3) is confirmed, that is, when the trailing edge of the paper is detected by the sensor (SE3),
In step (5359), the jam timer C is reset and the state counter is reset to 0''.

With this, one sheet of paper has been re-fed from the storage section (200) to the re-feed path (40>) of the main body (1) of the copying machine.

Next, in step (5360), when the on-edge of the sensor (SE4) is confirmed, that is, the standby mark (242) of the belt (240) is detected by the sensor (SE4), and the belt (240) reaches the end. If it is determined that the process has been rewound, timer G is started in step (5361). At this time, the paper to be re-fed is the last paper. The timer G is set to the time required for the trailing edge of the last sheet to pass through at least the nip portion of the registration rollers (330) and (331). Next, Stenbu (536
In step 2), it is determined whether or not the count of the timer G has ended, and if the count has not ended or the timer G is not operating, it is determined in step ($364) that the stop flag is off edge, If it is determined in step <5365) that the copy flag has been reset to "0", the paper refeed flag is reset to "O" in step (5366). On the other hand, in the step (5362), the timer G
When the end of counting is confirmed, step (5363)
Reset the paper presence signal to r□, and turn the motor (M3),
The clutches (CLI) and (CL2) are turned off, the paper refeeding flag is reset to r□, and the timer G is reset, and this subroutine ends.

Figures 24a and 24b show the jam detection and
The processing subroutine is shown.

Here, the occurrence of a jam in each part of the paper refeeding unit (100) is detected and warned, the operator is instructed to remove the jammed paper, and once the jammed paper is removed, the apparatus is reset.

First, in step (5371), it is determined whether or not the jam flag is r If it has been reset, step (5)
373), (5375), and ($377) for each jam timer A and B.

It is determined whether the count of C has ended or not, and if the end is confirmed, it is determined that a jam has occurred, and step (5374).

(5376), <5378) to set the jam B flag to “1”.
” and moves to step (5383). Also, step ($379)-r is trouble tie 7 [':)
, 7 Whelk (5227).

(5229)] Determine whether the count is completed [7,
If the completion is confirmed, the sensor (SE7) that monitors the driven rotation of the idle roller (246) goes to step (5380).
) is determined whether there is no pulse input. If there is no input, it is determined that the motor (G3) did not operate normally, and the jam B flag is set to "1" in step (5381), and the process moves to step (5383). On the other hand, if there is an input, the trouble timer is reset in step (5382) and this subroutine is ended.

In step (5383), the jam signal is sent to the CPU (80).
After sending a call to , the jam flag is set to rl in step (53s, i). Jam signal is CPU (80)
is processed and displayed on the display section (65) of the operation panel (60>.Furthermore, in step (5385) it is determined whether or not the jam A flag is "1", and if it is set to "rl", the step After confirming that the discharge flag is reset to r□ in step (5386), step (5387)
) to stop the operation of all drive systems, and step (538
In step 8), a forced ejection subroutine for directly ejecting the paper from the storage unit (200) to the outside is processed. On the other hand, if it is determined in step (5385) that the jam A flag has been reset to r□, then in this case the jam B flag is
1", the operation of all drive systems is stopped in step (5389). Here, the operator opens the guide cover (201) and removes the jammed paper. The opening and closing of the guide cover (201) is detected by the sensor (SE5), and when an off-edge of the sensor (SE5) is confirmed in step (5390), it is determined that the jammed paper has been removed and the guide cover (201) has been closed. Then, in step (5391), the jam signal is reset. Further, in step (5392), all jam flags and jam timers are reset, and this subroutine is ended.

FIG. 25 shows step (5) in the preprocessing subroutine.
232) or the forced ejection subroutine executed at step (538g) in the jam detection/processing subroutine.

Here, based on the opening operation of the guide cover (201) and the ON operation of the switch (SW), the paper stored in the storage section (200) is transferred to the belt (240) and the bobbin (230).
) by rewinding directly from the paper refeed unit (100
) is discharged to the outside.

First, in step (5401), the jam A flag is "1".
In step (5402), it is determined whether the τ paper present signal is "1" or not.In step (5403), it is determined whether the copy flag is r_OJ. Forced ejection of paper can only be executed when the jam A flag is set to rl, or when the paper present flag is set to "1" and the copy flag is reset to rO. If the state is executable, step (54)
After confirming that the discharge plug has been reset to 10" in step 04), set the sensor (SE5) in step 5405.
) is turned off, and step (540
In step 6), it is determined whether the switch (SW) is on-edge. The sensor (SE5) is turned off when the guide cover (201) is opened. Therefore, unless the sensor (SEA) is turned off, this subroutine ends. switch(
SW) is operated in operation 1-2, and when its on-edge is confirmed, the drive request signal is set to rl in step ($407), and the copy permission signal is reset to O4. The paper feed flag is reset to "O", the discharge flag is set to rl, and the motor (M3) is driven in the rewinding direction.

As a result, the sheets stored in the bobbin (230) are sequentially fed out from the belt (240), and as shown in FIG.
10) The paper is completely discharged from the pinch roller (216) onto the guide cover (201).

Next, in step (5408), it is determined whether the sensor (SEA) is on-edge, and if it is on-edge, that is,
When the standby mark (242) of the belt (240) is detected by the sensor (SEA), it is determined that the rewinding of the belt (240>) is completed, and in step (5409) the drive request signal is reset to "O4" and , motor (M3)
Turn off. Furthermore, after confirming that the discharge flag is set to "1" in step (5410), it is determined in step (5411) whether the sensor (SE5) is on-edge. When the guide cover (201) is closed and the sensor (SE5) is on-edge, step (54)
12) Set the copy permission signal to "1", reset the ejection flag and the Jim A flag to "10", set the overprint paper flag to "1", and set the paper present signal and paper feed. The prohibition signal is reset to r□, and this subroutine ends.

[Second Embodiment] In the above embodiment, the preprocessing subroutine (see FIG. 19) that allows the belt (240) of the paper storage section (200) to return to its initial position and the step (5230) in this subroutine are In the belt drive stop processing subroutine (see Fig. 20) executed at
) to detect the amount of movement of timer A.

Timer B was used. If the moving speed of the belt (240) is not constant, the pulse signal of the sensor (SE7) that motors the driven rotation of the idle roller (246) [belt (240)
40) may be used in place of timer A and timer B. Therefore, such a control procedure may be used in the second
This will be explained as an example. The control procedure here is specifically the same as that shown in FIGS. 12 to 25 above, and the flowcharts shown in FIGS. control based on the flowchart shown.

Here, the pulse count of the sensor (SE7) is started in step (5227') and step (5247''), and in step (5245') it is determined whether the pulse count is larger than the reference value (Na) or not.
), it is determined whether the pulse count is larger than the reference value (Nb). The reference values (Na) and (Nb) are set under the following conditions.

NaXP>L2...
・・■NaXP>NbXP>LX
""■P: Movement distance of the belt (240) per pulse■, 2 times above the pitch of the overrun mark (241) and the standby mark (242) and the overrun mark <24
1> [hereinafter referred to as margin] Lambda plate (7) In the ejection mode, the interval is reduced and the paper is fed out at the same interval as it was accommodated, so that the paper remaining wound around the belt can be quickly forcibly ejected.

[Brief explanation of the drawing]

1 to 25 show an embodiment of a paper refeeding device according to the present invention, FIG. 1 is a schematic configuration diagram of a copying machine body equipped with a paper refeeding unit, and FIG. 2 is a paper refeeding unit. 3 is a partial configuration diagram showing the guide cover in an open state, FIG. 4 is a rear view of the back frame, FIG. 5 is a perspective view of the drive mechanism from the side of the back frame, and FIG. 6 is a front view of the front frame, FIG. 7 is a perspective view showing the internal structure of the paper refeeding unit from the front frame side, FIG. 8 is a perspective view showing other internal structures of the paper refeeding unit from the front frame side, and FIG. 9 is a plan view of the paper storage belt, FIG. 10 is a plan view of the operation panel, 11th UyJ is a block diagram of the control circuit, and FIGS. 12 and 13.
14a, 14b, 15, 16, 173, 171), 18, 19, 20
Figure, Figure 21, Figure 22a, Figure 22 b13! u, second
Figure 3a, Figure 23b, Figure 23e, Figure 24a, Figure 24
1) Fig. 25 shows a broach showing the control procedure, respectively.
FIG. FIGS. 26 and 27 are flowcharts showing the control procedure of the second embodiment. (1) Copying machine main body, <10) Photosensitive drum, (40) Paper refeed path, (100) Paper refeed unit, (120) Paper feed Switching part, ([0)・
...Intermediate conveyance section, (200)...Paper storage section, (20
1) Guide cover, (210) Guide roller, (230), (235) Bobbin, (240
)...Paper storage belt, (320)...Paper refeeding section,
(SW)...Strong control 1 output switch, (SE5)...
・Open/close detection sensor.

Claims (1)

[Scope of Claims] 1. The paper discharged from the image forming apparatus main body can be sent to the image forming apparatus main body from the paper accommodating part after it is once stored in the paper accommodating part, and the paper accommodating part is connected to two belts. It includes a belt that is stretched between winding shafts and is wound back and forth, and when the belt is wound on one shaft, the paper is wound together with the belt on the shaft, and the belt is wound on the other shaft. In a paper winding type refeeding device that sometimes feeds out the paper that has already been wound up, a paper refeeding mode that feeds out the paper once stored in the paper storage section for image forming processing; a forced ejection mode in which the paper once stored in the section is ejected without image forming processing;
A paper refeeding device comprising: control means for feeding paper at predetermined intervals in the paper refeeding mode, and feeding the paper at predetermined intervals in the forced ejection mode;