JPS5835553A - Multimode copying machine - Google Patents

Abstract

PURPOSE:To make the paper eject with the rear face turned up, the both-face copy, and the multiple copy possible, by providing a by-pass between a fixing part and a paper eject tray. CONSTITUTION:A form where the copy for the front face is completed is introduced to a by-pass 29 and is fed to an intermediate tray 34 and is fed again to copy data on the rear face. If the form is introduced to the intermediate tray 34 directly without intervention of the by-pass 29, a different original is copied again on the front face to make the multiple copy possible. If the form is introduced to the by-pass 29 and is fed out to a paper eject tray 32, the form is ejected with the rear face turned up.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a double-sided electrophotographic copying machine,
The purpose of this is to enable use in multiple modes.

Mode switching, which is the object of the present invention, basically means four types of gray.

+11 copy 2 mode to eject face up.

(2) A mode that outputs copies face down.

(31 Mode for double-sided copying.

(41 mode for multiple copying.

Can be combined within a wide range. That is, the f3+-f2+ mode outputs a double-sided copy face down.

+41-121 mode in which multiple copy 2 is ejected face down.

Multiple copying is performed on all sides (41-+31 mode, etc.).

The reason why modes (1) and (2) are necessary among the above-mentioned modes is as follows. Mode (1) is the one adopted by ordinary copying machines, and the copies are ejected face up, so in order for the copies stacked on the ejection tray to become pages, Copying must start from the last page of the manuscript. In mode (2), the copies are ejected face down, so it is necessary to invert the copy to see the finished product, but when it comes to page alignment, it is sufficient to copy in the order of the pages of the original. Also, for the sorter connected to the copier.

As shown in FIG. 1, there is a type 8 type copying machine in which the copies ejected from the copying machine 1 are distributed to the bin 3 of the sorter 2 without being turned over as shown by the arrow A.
The sorter 4 shown in FIG. 2 turns the copies inside out and distributes them to the bin 3 as shown by arrow B, so in order to deal with this and perform page alignment, the mode fi+, 1 is set.
It would be convenient to be able to switch between 21.

Mode (4) is a mode in which the contents of multiple originals are overlapped and copied on the same side of the paper.For example, when writing cannot be done directly on the original, but writing is necessary for copying. It is something that can be put to good use.

The object of the present invention is not only to enable switching between the above-mentioned modes, but also to realize this without using any additional device sound.

Next, the present invention will be explained with reference to embodiments shown in FIG. 3 and subsequent figures.

Reference numeral 5 denotes a drum-shaped photoreceptor, which rotates in the direction of arrow C. The photoreceptor 5 is uniformly charged by a charger 6 and then subjected to slit exposure in an exposure section 7.

Reference numeral 8 denotes an exposure optical system which scans the document on the contact glass s through a slit and projects the scanned image onto the exposure section 7. The electrostatic latent formed by this deep exposure becomes a visible image by the developing device 1O and moves toward the transfer section 11. On the other hand, the paper 14 is selectively fed from the paper feed tray 12 or a13.

The paper is conveyed along the guide 15 in the direction indicated by the arrow, and after timing is adjusted by the registration rollers 16, the paper is supplied to the transfer section 11.

The paper 14 that has been transferred in the transfer section 11 is separated from the photoreceptor 5 by a separation/conveyance belt 17, and then heads toward the fixing device 1s'. The photoreceptor 5 in the transfer section is cleaned by a cleaning device 19, the static electricity is removed, and the cycle is repeated again.

Fixing device 181/f, single-sided copied paper 14 passed through
is sent to the mode switching device 19, where the course is switched according to each mode ÷°.

FIG. 4 shows details of the mode switching device 19. A roller 20 rotating in the direction of arrow F is disposed on the path E of the paper 14 from the fixing device 18, and pinch rollers 21 and 22 are in rolling contact with it. Pinch roller-2
While maintaining the 1,22H transition state, from the position shown by the solid line,
It can be moved to the position shown by the overlapping chain lines as shown by the arrows G and 1. From above, the guide plate 23,
24 is hanging down. The right guide plate 24 is formed long and reaches near the pinch roller 22. Both guide plates 23 and 24 are arranged in parallel, and the paper 14 is placed between them.
It forms a vertical passage for. Both guide plates 23.
Following the upper end of 24, a return roller 25 and a pinch roller 26 are provided which roll into contact with the return roller 25. Vinchiro
The roller 26 is a return roller 2 when the solenoid 27 is energized.
5, but at other times, the return roller 25
away from the passageway by guide plates 23,24.

It communicates with the passage by guide plates 28,29.

A branch plate 30 is provided on the exit side of the roller 20.

The branch plate 30 can be freely rotated between a solid line position away from the roller 20 and a chain line position where it enters a groove provided in the roller 20, thereby switching the course of the paper 14. A pair of paper ejection rollers 31 is provided on the right side (outlet side) of the roller 20, and a paper ejection tray 32 is provided next to the pair of paper ejection rollers 31 to protrude outside the machine. There is a branch plate 3 on the lower right side of the roller 20.
A guide 33 is provided following the intermediate tray 3.
It forms a passageway leading to 4. A pair of discharge rollers 35 is provided in the middle of this passage. The short tray 34 receives the sheets 14 sent through the guide 33 in a stacked manner in an aligned state, and also stacks the sheets 14 fed through the guide 33 and stacks the sheets 14 along the guide 15.
It has the function of sending it out towards.

Next, set the mode switching device 19 at the center of its operation.

The operation of this embodiment will be explained for each mode.

(1) Copy 2 mode for ejecting face up.

In this mode, both pinch rollers 21 and 22U of the mode switching device 19 are in rolling contact with the roller 20 at the positions indicated by the chain lines in FIG.

Further, the branching plate 30 has also been rotated to the position shown by the chain line. Therefore, the paper i4u that has advanced as shown by arrow E
, by the roller 20 rotating in the direction of arrow F, the paper is sent out toward a pair of paper ejection rollers 31, and is ejected onto the paper ejection tray 321 with the copy side facing upward.

A mode that outputs 121 copies face down.

In this mode, the pinch rollers 21 and 22 are in rolling contact with the roller 20 at the positions indicated by solid lines. The paper 14 that has advanced as shown by the arrow E is moved by the pinch roller 2.
1, proceed upward, along the guide plate 24 on the right side in the direction of arrow G, until you reach the odor roller 25 I!
After passing all the way through, it enters between guides 28 and 29. Paper 14
When the sensor 36 provided near the roller 20 detects the rear end, the solenoid 27 is energized at the same time and the return roller 25 rotates in the direction of arrow H. the result.

The paper 14 is driven in the opposite direction of the arrow G and is fed into the rolling contact section between the pinch roller 22 and the roller 20. The paper 14 that has passed through this rolling contact section.

1. Due to the action of the branch plate 30 located at the chain line position. The path is changed to the exit direction, passes through a pair of paper ejection rollers 31, and is delivered to the paper ejection tray 3.
2. Paper 14 is.

By turning the switch in the path L to the guides 23 and 24, the front and back and front and back sides are reversed, so that the sheets 14a on the paper discharge tray 32 are stacked with the copy side facing downward.

;3) Double-sided copy mode.

The state of the mode switching device 19 at the time of copying the first side in this mode is that the branching plate 30 is in the real state! Other than rotating to the position, the state is the same as in the mode (21) above. Therefore, the sheet 14 with single-sided copies that has been switched by the return roller 25 is moved between the roller 20 and the branching plate 30. The sheet 14, which has been copied on one side on the intermediate tray 34, is turned upside down by the switch turn, and is driven by a pair of discharge rollers 35 to be sent to the intermediate tray 34. and stored with the copy side facing up.

In the copy cycle to the second side, which is performed as the intermediate tray 34 paper feed tray, the paper 1 that has been copied on one side is
4 is the guide 15. The image passes through the registration roller 16i, reaches the transfer unit 11, where it is transferred to the second surface, passes through the fixing device 18 again, and reaches the mode switching device 19.

When passing the paper for the second time, the mode switching device 19
The mode is automatically switched to mode (1) or (2). Therefore, if the mode is switched to (1), the second side should face upward.

If the mode is switched to 121, the paper 14 with the second side facing down and one double-sided copy completed is placed in the paper output tray 3.
2.

(4) Multiple copy mode.

In this mode, both pinch rollers 21 and 22 are at the position shown by the chain line, and the branch plate 30 is at the position shown by the solid line. Therefore, after the sheet 14 with five single-sided copies has passed the entire roller 20, the paper 14 which has been copied on one side of the paper 1.1 without performing a switch turn. After being directed to the intermediate tray 34 and stocked there, a second copy is performed. Therefore, this second copy is
This will be done on the same side as the previous copy, resulting in a % double copy. Note that for triple or more copies, it is sufficient to repeat this mode, and whether to make the copy side face upward or downward when discharging the paper 14 can be determined using the mode fil,
Can be selected by combining +21ii.

As described above, the present invention provides paper 't% after passing through the fixing device.
In a double-sided copying machine of the type that is equipped with a path switching device that switches between a path toward a paper output tray and a side path, the sheet entering the side path is switched and then sent to the first copying process again. The device can switch between a mode in which the paper that has been switch-turned in the side path is ejected directly to the paper output tray, and a mode in which it is sent to the first copying process again without entering the side path. In addition to the two modes of copying and double-sided copying, the front side of the ejected copy can be oriented either unidirectionally or downwardly, and multiple originals can be overlapped and copied without using transparent originals. Moreover, each of these modes can be obtained with a configuration not much different from that of a conventional double-sided copying machine.

[Brief explanation of the drawing]

1 and 2 are front views showing the relationship between a copying machine and a sorter, FIG. 3 is a front view of an embodiment of the present invention, and FIG. 4 is a front view of the mode switching device and its surroundings. It is a diagram. 5... Photoreceptor, 11... Transfer section, 14... Paper. 18... Fixing device, 19... Mode (path) switching device. 20...Roller, 21.22...Pinch roller
12, 3, 24... Guide plate, 25... Return roller. 30... Branch plate, 32... Output tray, 34...
intermediate tray. Patent applicant Ricoh Co., Ltd. IE No2El So31E1 1)

Claims (1)

[Claims] A path switching device is provided which switches the paper after passing through the fixing device to a paper output tray between seven paths and a side path, and after switching the sheet that has entered the side path, it is A multi-mode copying machine that performs copying on both sides of a sheet by sending it to the first copying process again, characterized in that the path switching device can also be switched to the next mode. A mode in which the paper that has been switched in the fil side path is sent directly to the paper output tray without being sent to the first copying process again. (2) A mode in which the paper after passing through the fixing device is sent to the first copying process again without being sent to a side path.