JPS6180270A - Temporarily accepting and backward feeder for upsetting of copying paper for copying machine - Google Patents

Abstract

PURPOSE:To simplify construction by providing a discharge roller so as to be used commonly for the discharge operation of a discharge device which has an inlet part adjacently to the outlet and inlet of a guide path and is used to discharge the transfer paper fed from a conveying direction change device. CONSTITUTION:The transfer paper fixed by fixing rollers 25, 25' is conveyed to guide rollers 27, 28 through the forward path A guided by guide plates 26, 26' and is conveyed toward the free revolving roller 29 and discharge roller 30 of a temporarily accepting and backward feed part for upsetting C by the rollers 27, 28. A conveying direction change follow up plate 41 is in the position of a solid line in this case and therefore the transfer paper is smoothly conveyed toward the roller 30 and the roller 29. The acuator 51 of the roller 29 is preliminarily de-energized and the roller is in the position of a virtual line at the same instant and therefore the front end of the transfer paper conveyed by the roller 30 and the roller 29 passes through the space existing between the roller 29 and the roller 30 and is accepted in the guide path formed by the guide plates 31, 32, 33 of the temporarily accepting and backward feed part C. The construction is thus simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Volume] The present invention relates to a copying machine, and particularly relates to a temporary receptacle for reversing copy sheets of a copying machine and a reversing device.

[Prior art]

Conventionally, the copy paper used to copy materials such as manuscripts has only been copied on one side.
Two-sided copying, which copies both sides of copy paper, is necessary to save copy paper, and to reduce the amount of paper used when a large amount of copy paper is consumed, making storage of copy paper more efficient. It has arisen.

For this reason, various double-sided copying devices have been developed.
Both copying machines incorporate mechanisms such as a paper feed section, a transfer section, a fixing section, and an ejection section, as well as a reversing and branching device for reversing the front and back of copy paper. In order to reverse this copy paper, the path of the copy paper that has been fed from the paper feed section of the copying machine, transferred, fixed, and proceeded to the output section is branched and reversed to be returned to the paper feed section. A reversing device is required.

This conventional reverse feed device will be explained with reference to FIG. 7'l, 71'.Fixing roller 71.
The copy paper with one side fixed at 71' passes through guide plates 72, 73 and is transferred to conveyance direction control roller 7 by guide rollers 74, 75.
B, 7B'. This duck guide roller 74.7
Since the conveyance direction branching plate 84 interposed between the conveyance direction control rollers 7B and 7B' is located at the position indicated by the broken line, the copy paper can be transferred to the conveyance direction control roller without being obstructed by the conveyance direction branching plate 84. 78.78'.

This conveyance direction lA control roller is a roller that can rotate in forward and reverse directions, and rotates (hereinafter referred to as forward rotation) so as to convey the copy paper sent from the guide rollers 74, 75 toward the guide plate 76, 77. , copy paper guiding roller 73.83
It can be rotated so as to move backwards toward the target (hereinafter referred to as reverse rotation).

Then, by rotating the conveyance direction control rollers 18, 18' in the forward direction, the copy paper is conveyed by the conveyance direction control rollers 78, 78', and is advanced over the guide plate 76°76, and the rear end However, the conveyance direction control rollers 78, 78'
At the stage where the copy paper is being held between the guide rollers 75 and 78', when the conveyance direction control rollers 78 and 78' are rotated in the reverse direction, the copy paper passes between the guide plate 72 and the conveyance direction branching plate 84, and is moved to the guide rollers 75 and 78'.
It is reversed to 83. The single-sided copy paper that has been branched and reversed in this manner is reversed while passing through a return path (not shown) via the guide plate 82 and is conveyed to the paper feed section.

This inverted copy sheet with its back side facing up, which has not yet been copied, is fed again. The re-fed copy paper is transferred by a transfer unit (not shown) and conveyed to fixing rollers 71 and 71'. The copy paper fixed by the fixing roller 71.71' is conveyed to the guide roller 74.75 via the guide plate 72.73. The double-sided copy paper guided by the guide rollers 74, 75 is conveyed to the discharge rollers 81, 81' via the guide plate 80. In this case, the conveyance direction branching plate 84 has been rotated about the pivot shaft 84' from the position indicated by the broken line to the position indicated by the solid line in response to a command signal in advance, so that the copy paper conveyed from the guide rollers 75 and 76 is It comes into contact with the conveyance direction branch plate 84 and is conveyed to the discharge rollers 81, 81'.

The copy paper conveyed to the discharge rollers 81, 81' is subjected to double-sided copying and is discharged to a copy tray (not shown).

By the way, in such a reverse feed device, since the conveyance direction control rollers 78 and 78' rotate in both forward and reverse directions to advance the copy paper in the reverse direction, two drive mechanisms for forward rotation and reverse rotation are required. is required, and the clutch is also required accordingly,
Has the structure become more complicated? There was also the problem that strikes would also increase.

Further, the conveyance direction control rollers 7B and 7B' are discharge rollers 8.
1. , 81', and was used only for reversing copy paper. Therefore, a pair of ejecting rollers are required to eject the double-sided copy paper, which requires a large number of parts and has a complicated structure.

[Means for solving problems]

Therefore, the present invention has been made by focusing on the above-mentioned problems, and includes a system that guides the copy paper sent from the conveyance direction switching device B that switches the conveyance direction of the copy paper sent from the fixing rollers 25, 25'. guide boards 31, 32, 33, and these guide boards 3
It is pivotally supported at the entrance/exit part of the guide path formed by 1.32.33, and has an artificial part adjacent to the entrance/exit part of the guide path, and transfers the copy paper sent from the conveyance direction switching device B to the outside of the copying machine. a discharge roller 30 which is arranged so as to also serve as a discharge function of a discharge device for discharging the copy paper to a fixed direction and is driven and rotated in a fixed direction; When discharging the copy paper from the guide path to the conveyance direction switching device B, the self-rotating roller 29 is configured to sandwich the copy paper between the discharging roller 30 and being pressed toward the discharging roller side. The purpose of the present invention is to solve the above-mentioned problems by providing a reverse feeding device for temporarily receiving and reusing copy paper in a copying machine.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS How the configuration of the present invention is actually implemented will be explained below with reference to the drawings, together with its operation.

FIG. 1 is a longitudinal cross-sectional view of a copying machine in which a temporary tray for reversing copy paper is incorporated and a reverse feeding device is incorporated in the copy machine according to an embodiment of the present invention. The lower copying machine table part X and the upper copying machine upper swinging part Y are connected to the transport path.
Normally, the upper swinging part Y of the copying machine is placed in a horizontal position on the copying machine base part X, but if an accident such as a paper jam occurs in the copying machine, the copying machine The machine upper swinging section Y is tilted with respect to the copying machine stand section X as shown in the imaginary line about the pivot shaft 67, so that the inside of the copying machine can be opened.

A paper feed cassette 1 storing copy paper P is installed on the right end side of the copying machine table X, and a paper feed roller 2 for feeding the copy paper P is provided above the paper feed cassette 1. ,
The copy paper fed by the paper feed roller 2 is fed to the guide plates 3 and 4.
．． s, guide rollers 6, 6', guide plates 7, 7' and guide rollers 8, 8'.

A photosensitive drum 9 whose entire circumferential surface is coated with a photosensitive layer (not shown) is rotatably mounted approximately in the center of the copying machine, and light is projected from a light source 15 onto the document on the transparent plate 14. The light is reflected by a mirror 16. Movable reflector 17, 18, lens 20,
The image of the document is projected onto the photosensitive layer via the movable reflecting mirror 19 to form an electrostatic latent image on the photosensitive layer. Around the photosensitive drum 9, there is a charging corona discharger 11 that sequentially charges the photosensitive layer in the direction of rotation, and a charging corona discharger 11 that visualizes the electrostatic latent image formed on the photosensitive layer and converts it into a toner image. Developing device 1
2. A transfer corona discharger 10 for transferring the toner image formed on the photosensitive layer onto copy paper; a separating corona discharger 10' for separating the copy paper from the photosensitive drum 9; A device such as a cleaning device 13 is provided for removing toner remaining in the toner.

Reference numerals 21 and 22 denote a pair of belt rollers, and a conveyor belt 23 is stretched between the belt rollers 21 and 21 to convey the copy paper transferred from the photosensitive drum 9 to a fixing roller 25° 25' via a guide plate 24. There is.

As shown in FIG.
6.26', and is conveyed to the guide rollers 27 and 28 toward the conveyance direction switching device B.

By the guide rollers 27 and 28, the copy paper is temporarily received and then reversed.A temporary receptacle for reversing is inserted and the copy paper is moved to the guide roller 30 of the reverse feeding section C and the first path toward the free rotation roller 29. and a second guide toward the discharge roller 34 of the discharge device which directly discharges the copy paper from the guide rollers 27 and 28 toward the discharge port 35 which discharges the copy paper outside the copying machine, and the discharge roller 30 which also serves as the guide roller 30. transported along the road.

The conveying direction switching device B branches these two guide paths into a first guide path for copying the back side of the copy paper with one side fixed, and a second guide path for copying both sides.
It is. This conveyance direction switching device B includes a conveyance direction switching board 4 that can rotate about a pivot 39 with respect to the main body of the copying machine.
0, and a conveyance direction switching follower plate 41 facing away from and facing away from the copy paper conveyance surface of the conveyance direction switching board 40. This conveyance direction switching follower plate 41 is the conveyance direction switching board 4
A copy paper transport path S is formed between the copy paper transport path S and the transport direction switching board 40;

An arm 42 protrudes from the pivot portion 39 of the transport direction switching board 40, and the other end of the arm 42 is connected to the rod 945 of the actuator 44.
It is supported by the cardinal branch 43. Then, when the actuator 44 is energized, the conveyance direction switching board 40 and the conveyance direction switching following plate 41 are located at the position indicated by the solid line in FIG. 2. In other words, the temporary reversing receiver is placed in a first rotating position in which the exit of the forward passage A and the entrance of the return passage E are communicated with the entrance and exit of the reversing section C. Furthermore, when the actuator 44 is de-energized, the conveyance direction switching board 40
Then, the conveyance direction switching follower plate 41 is displaced from the position indicated by the solid line to the position indicated by the imaginary line. That is, it is in the second rotational position where the outlet of the 11Fj feed path A is communicated with the inlet of the discharge device.

Guide rollers 30 and free rotation rollers 29 of the temporary reversing receiver and reverse feeding section C are provided with guide plates 31, 32, 33 for guiding the copy paper sent from the guide rollers 27, 28.
has been extended. That is, the guide roller 30 is connected to the guide plate 31
, 32 and 33, and has an entrance adjacent to the entrance and exit portion of the guide path, and carries the copy paper fed from the guide rollers 27 and 28 outside the copying machine. A discharge roller 30 of a discharge device for discharging to
It also functions as a rotor, and always rotates clockwise.

The rotary shaft 46 of the free rotating roller 29 is pivotally supported by an arm 47, the other end of this arm 47 is pivotally supported by a link 49 at a pivot 48, and the other end of this link 49 is supported by a rod 52 of an actuator 51.
And its! ■It is supported by 50 branches. and actuator 51
When energized, the free rotation roller 29 is located at the position indicated by the solid line, contacts the discharge roller 30, and rotates counterclockwise. When the actuator 51 is de-energized, the freely rotating roller 29 is displaced from the position indicated by the solid line to the position indicated by the imaginary line, and is separated from the discharge roller 30.

This freely rotating roller 29 is located at the position of the imaginary line when the discharge roller 3
0, the front end of the copy paper sent from the guide rollers 27 and 28 passes through the temporary reversing guide plates 31 and 32.
．． The receiver is inserted into the guide path formed in 33. Then, the rear end of the copy paper is still connected to the discharge roller 30 and the free rotation roller 2.
9, the actuator 51 is energized to move the freely rotating roller 29 from the position of the imaginary line to the position of the solid line to nip the rear end of the copy paper, and the clock of the discharge roller 30 is moved. rotation and counterclockwise rotation of the free-rotating roller 29 will cause the copy paper to be fed back towards the guide roller 2.8.36. The copy paper conveyed to the guide roller 28° 36 passes through the guide plate 37° 38 of the return path E, and then reaches the guide roller 5.
3,53'.

As shown in FIG.
5. Guide rollers 57, 57' via guide plates 56 and 56'
transported to.

Reference numeral 60 denotes a copy paper width aligner for aligning the paper widths of the copy sheets conveyed from the guide rollers 57, 57'. are arranged. 63, 63' are paper feed rollers that re-feed the copy paper that has come into contact with the stopper 44, and the copy paper fed here is passed through the guide plates 64, 64', the guide rollers 65, 65', the guide plates 66, . 66' and is guided to the guide plate 5.

Next, to explain the operation of the copy paper reversing temporary receiver and reversing device of the copying machine with the above configuration, first, as shown in FIG. Paper is fed by paper roller 2.

The fed copy paper is transferred to the guide plates 3, 5 and the guide roller 6.
．． 6', guide plates 7, 7', and are fed by guide rollers 8, 8' so as to closely contact the photosensitive layer of the photosensitive drum 9, and one side thereof is transferred.

The copy paper on which one side has been transferred is conveyed by a conveyor belt 23 via a guide plate 24 to fixing rollers 25, 25'.

The copy paper fixed by the fixing rollers 25, 25' is guided by guide plates 26, 26' and conveyed along a progressive path A to guide rollers 27, 28, as shown in FIG. The copy paper, which has been transferred and fixed on one side, is conveyed to the guide rollers 27 and 28, and is temporarily received for reversal by the guide rollers 27 and 28, and the freely rotating roller 29 of the reverse feed section C and the discharge roller 3
It is transported towards 0. In this case, the guide rollers 27, 28
Since the conveying direction switching board 40 and the conveying direction switching follower plate 41 of the conveying direction switching device B, which are interposed between the freely rotating roller 29 and the discharge roller 30, are at the position indicated by the solid line, that is, the first rotation position. The copy paper is smoothly conveyed to the discharge roller 30 and the freely rotating roller 29. At the same time, the free rotating roller 29
Since the actuator 51 is de-energized in advance and is at the position of the imaginary line, the leading edge of the copy paper conveyed to the guide roller 30 and the free rotation roller 29 is connected to the free rotation roller 29 and the discharge roller 30.
The reversing temporary receptacle is inserted through the gap between the reversing section C and the reversing section C, and is inserted into the guide path formed in the guide plates 31, 32, and 33 of the reversing section C.

Then, when the rear end of the copy paper is located in the gap between the freely rotating roller 29 and the discharge roller 30, the actuator 51
When energized, the freely rotating roller 29 moves from the position shown by the imaginary line to the position shown by the solid line, presses against the ejection roller 30, and pinches the rear end of the copy paper with the ejection roller 30. When the rear end of the copy paper is clamped, the copy paper is then fed backwards and passes over the conveyance direction switching board 40 due to the clockwise rotation of the discharge roller 30 and the counterclockwise rotation of the freely rotating roller 29. and is conveyed to guide rollers 28 and 36.

The copy paper sent back to the guide rollers 28 and 36 is transferred to the guide plates 37 and 38 of the return path E, the guide rollers 53 and 53', the guide plates 54 and 54' shown in FIG. 1, and the guide rollers 55 and 55'.
, guide plates 56 and 56', and guide rollers 57 and 57', and are conveyed to the copy paper width aligner 60. The copy paper whose width has been made uniform by the copy paper width aligner 60 is conveyed by a conveyance roller 61, and its leading end abuts against a stopper 62 to be made uniform.

The copy paper with its leading edge aligned is transferred to guide plates 64, 64 . 'Guide rollers 65, 65
', and is conveyed by guide rollers 65, 65', through guide plate 66, 66' and guide plate 5, to guide roller 6,6'. The copy paper on which one side has been copied is fed to the paper feed roller 63,
63', guide plate 64°64', guide rollers 65, 65'
, while passing through the guide plates 66° and 66', the paper is turned over and transported with the back side, which has not yet been copied, facing upward.

This reversed copy sheet is guided from guide rollers 6, 6' to guide plates 7, 7' and conveyed to guide rollers 8, 8'.

The copy paper, which is conveyed to the guide rollers 8, 8' and whose back side has not yet been copied, is placed in a transfer corona discharger 10.
The photosensitive laminate 9 is fed in close contact with the photosensitive layer of the photosensitive laminate 9 facing the photosensitive layer 9, and the back side, which has not yet been copied, is transferred. After the transfer is completed, the copy paper is sent by the conveyor belt 23 via the guide plate 24 to the fixing rollers 25 and 25', where it is fixed.

The fixed copy paper is transferred to guide plates 26, 2 shown in FIG.
6' from the guide roller 27.28 to the discharge roller 30.
34, and is discharged from the discharge port 35 to the copy receiver 59 via the guide plates 58, 58' shown in FIG. In this way, double-sided copying can be completed. In this case, the conveyance direction switching board 40 and the conveyance direction switching/following plate 41 of the conveyance direction switching device B are operated by de-energizing the actuator 44 in advance as shown in FIG. Therefore, the copy paper sent out from the guide rollers 27 and 28 smoothly passes between the conveyance direction switching board 40 and the conveyance direction following plate 41 and is conveyed to the discharge rollers 30 and 34. It is something that

"Effects of the Present Invention" According to the present invention, the guide path is pivoted at the entrance/exit portion of the guide path formed by the guide plate in the conveyance direction switching device.
The guide path has an entrance portion adjacent to the entrance portion and is disposed so as to also function as a discharge device for discharging copy paper sent from the conveyance direction switching device out of the copying machine. Since we have provided a discharge roller that is driven in the direction of -16, it can be used both as a guide roller for reverse movement and as a discharge roller in the transport direction switching device.As a result, the structure of the Souganki is simplified and the number of parts can be reduced. Can you save money? The copier can also be made more compact by eliminating the need for a discharge roller.

Further, when the copy paper is fed into the guide path formed by the guide plate in the conveyance direction switching device, it is separated from the discharge roller, and when the copy paper is discharged from the guide path to the conveyance direction switching device B, it is separated from the discharge roller. Since a freely rotating roller is provided that clamps the copy paper and presses it toward the ejecting roller, the free rotating roller in the conveyance direction switching device does not require two rotations in the forward and reverse directions, and can only be rotated in one direction. As a result, the drive system can be easily controlled, which helps reduce costs.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a copying machine incorporating a temporary receiver for reversing copy paper according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a temporary receiver for reversing copy paper and a reverse feeding device. , FIG. 3 is an explanatory diagram of a conventional copy paper reversing/temporary receiving/reverse feeding device. B... Conveyance direction switching device, C... Reversing-standby reverse feeding device, D...
...Discharge device, 25.25'...Fixing roller, 29...
-Free rotation roller, 30...discharge roller, 31.32,33...guide plate.

Claims (1)

[Claims] Guide plates 31, 32, and 33 that guide the copy paper sent from the conveyance direction switching device B that switches the conveyance direction of the copy paper sent from the fixing rollers 25 and 25'; and these guide plates 3.
1, 32, and 33, and has an entrance adjacent to the entrance and exit portion of the guide path. a discharge roller 30 which is arranged so as to also serve as a discharge function of the discharge device D for discharging the copy paper to the guide path, and is driven and rotated in a certain direction; When discharging the copy paper from the guide path to the conveyance direction switching device B, the copying machine is provided with a freely rotating roller 29 that pinches the copy paper between it and the discharging roller 30 and is pressed toward the discharging roller side. Temporary receiving and reverse feeding device for reversing copy paper in the machine.