JPS60159758A - Carrying device of copy paper for copying machine - Google Patents

Abstract

PURPOSE:To obtain a copy paper carrying device which can improve the efficiency of copying, by providing carrying direction control rolls, which can be rotated forward and reverse, and a circulating direction switching tool which switches the direction of copy papers sent to carrying direction control rolls to a prescribed direction. CONSTITUTION:When it is unnecessary to send copy papers, where pictures are already copied on one faces, to the second paper supply cassette, for example, in case that pages are put in order, a circulating direction switching tool 30 is turned left around a pivot 30a by a command signal as shown by long dash and double short dash alternating lines in the figure and is connected to a circulating direction guide path 31. The copy paper sent from carrying direction control rolls 29 and 29 is led to the circulating direction guide path 31, and rolls 29 and 29 are rotated reverse in the state, where the rear end part of the copy paper is held between rolls 29 and 29, to eject the copy paper onto a copy saucer 5 through eject rolls 46 and 46'. Thus, since copy papers are inverted without rubbing picture faces of copy papers with a circulating belt 35, this device is effective to arrangement of pages or the like, and the efficiency of copying is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a copy paper conveyance device for a copying machine, and more particularly to a copy paper conveyance device for a copying machine that can copy both sides of a copy paper.

(Prior Art) Conventionally, copy paper used to copy objects such as manuscripts has been copied only on one side.
The necessity of double-sided copying has arisen in order to save copy paper, and because when a large amount of copy paper is consumed, the amount of paper used can be halved and copy paper can be stored more efficiently. In order to make double-sided copies, a complicated method is used in which one side of the copy paper is copied, the paper is ejected from the ejection port, the paper is then manually turned over, and the paper is placed in the feed port and copied again. It had the disadvantage of efficiency.

In order to eliminate these drawbacks, some large-scale copying machines have been developed that automatically flip the copy paper and make double-sided copying possible, but this requires a complicated flipping mechanism and requires equipment. It also became larger, and as a result it could not be adapted to small desktop machines.

(Objective and Structure of the Invention) Therefore, the present invention aims to move copy paper A supplied from the first paper feed cassette 3 and having an image transferred and fixed on one side in a commanded direction based on a command signal. Conveying direction control rollers 29, 29' for conveying, a return direction switching device 30 for switching the copy paper A sent to the conveyance direction control rollers 29, 29' in a predetermined direction, and this return direction switching device 30. A return device 35 that returns the copy paper A sent from the conveyance direction control rollers 29 , 29 ′ to the second paper feed cassette 4 via the transport direction control rollers 29 , 29 ′, and a copy paper sent through the return tool 35 . A is provided with reversing rollers 42 and 42' for feeding the sheet A into the second paper feed cassette 4 in a reversed state so that the image is transferred to the other side, and the conveying direction control rollers 29 and 29' When it rotates in the forward direction according to the signal, the return/feed direction switching tool 30 is rotated toward the return or route direction according to the command signal to send the copy paper A to the return tool 35, and the conveyance direction control roller 29, 29'
When reversely rotates, the return direction switching tool 30 is rotated in a direction away from the return tool 35 in response to a command signal, and the copy paper A is transferred to the copy tray 5 without contacting the return tool 35. The main object of the present invention is to provide a copy paper transport device for a copy machine that can perform double-sided copying and improve copying efficiency by providing a copy paper transport device for a copy machine that feeds the copy paper.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a simplified cross-sectional view of the copying machine in an inverted state, and FIG. 2 is a cross-sectional view of the copying machine that makes copies on the other side of the inverted state. In the figure, reference numeral 1 denotes a main machine frame, and a transparent plate 2 on which a document is placed horizontally is provided above the frame. The first paper feed cassette 3, which stores the copy paper A, is attached to the center shaft at the right end of the main machine frame l, as shown in FIG. A cassette 4 is provided below the first paper feed cassette 3, and the copy paper after copying is discharged to a copy tray 5 provided at the left end in FIG. Note that the paper feed cassettes installed in the main machine frame 1 in this way are the first paper feed cassette 3, the second paper feed cassette, which are installed vertically side by side.
The number of paper feed cassettes 4 is not limited to two in two stages, but a large number of paper feed cassettes 4 may be arranged vertically in multiple stages, such as three in three stages, to store copy sheets of various sizes.

Approximately at the center of the main machine frame 1, a photosensitive film is rotatably mounted, the entire circumference of which is coated with a photosensitive layer (not shown). The light is projected onto the photosensitive layer via movable reflecting mirrors 7, 8, in-mirror lens 9, and reflecting mirror 10 to form an image of the original,
An electrostatic image is formed on the photosensitive layer. Surrounding the photosensitive drum 6 are a charging corona discharger 11 for charging the photosensitive layer, and a developing device 1'2 for visualizing the electrostatic latent image formed on the photosensitive layer into a toner image. A transfer corona discharger 13 for transferring the toner image formed on the photosensitive layer onto copy paper, and a cleaning device 14 for removing toner remaining on the photosensitive layer after transfer are disposed.

18.18', 20.20', 22.22', 23゜2
Reference numeral 3' designates a pair of transport rollers for transporting the copy paper A that has been pushed up by the lever 16 and fed by the paper feed roller 15 for single-sided copying. Also 1
7 and 17' are the paper feed roller 15 and the conveyance rollers 18 and 1.
8' is a guide plate installed between 19 and 19.
Reference numerals ', 21, and 21' designate a pair of guide plates that are installed between the rollers and guide the copy paper between the rollers. Reference numeral 25 denotes a fixing device, and the copy paper heat-fixed here is sent out by a delivery roller 26, 26', passes through discharge rollers 46 and 46', and goes to a first guide path toward the copy tray 5, and from this first guide path. It is conveyed along a second guide path that branches in the vertical direction and heads toward the return tool 35. 24
24' is a guide plate installed between the conveying rollers 23, 23' and the fixing device 25.

A substantially triangular conveyance direction switching plate 27 is provided between the feed roller 26.degree. 26' and the ejection roller 46.46' to branch into the two guide paths.

This conveyance direction switching plate 27 is pivoted by a pivot shaft 27a, and can be rotated about the pivot shaft 27a by a command signal, and when it is rotated in the horizontal direction as shown in FIG. The copy paper sent out from 26° 26' passes over the conveyance direction switching plate 27 and takes the first guide path toward the copy 0-receiver tray 5 via discharge rollers 46 and 46' following the thread path shown by the imaginary line. . On the other hand, when the conveyance direction switching plate 27 is rotated upward I, as shown in FIG.
The copy paper fed out comes into contact with the conveyance direction switching plate 27 and is branched in the vertical direction, taking a second guide path as shown by the imaginary line.

A pair of guide plates 28 are provided below the conveyance direction switching plate 27.
28' is disposed, and below this guide plate 28°28' is an auxiliary machine frame 3 that is integrally attached to the main machine frame 1.
A pair of conveyance direction control rollers 29- mounted on the
．． 29' is provided. The conveyance direction control rollers 29, 29' are branched by the conveyance direction switching plate 27, and in response to a command signal, the copy paper guided by the guide plates 28, 28' is transferred to the return device 35 located below. It can be rotated to feed the copy (hereinafter referred to as normal rotation), or sent to the copy tray 5 via the discharge rollers 46 and 46' located above (hereinafter referred to as reverse rotation).

Between the conveyance direction control rollers 29, 29' and the return belt 35, which is a return device located below the conveyance direction control rollers 29, 29', there is a conveyance direction control roller 29, 29'.
A return direction switching device 30 is provided for switching the copy paper A sent in by 9, 29' in a predetermined direction, and the effects of this return direction switching device 30 will be explained in detail later. 31 is a return direction switching guide path provided in the auxiliary machine frame 32.

As shown in FIG. 1, the return route 35 is stretched between a route roller 33 located at the left end of the auxiliary machine frame 32 and a route roller 34 located at its right end. Note that the return roller 35 is not limited to the roller controller, and a roller controller may be used as long as it can carry the copy paper while placing it thereon. For the return, a belt roller 36 is disposed to hold the belt 35, and a belt roller 37 is provided diagonally above the belt roller 36 to protrude from the main machine frame 1. Below the belt roller 37, an auxiliary belt is installed. A double roller 39 is provided to hold the roller 40, and
6 and 37 (the belt 38 is connected to the belt roller 34)
An auxiliary R route 40 is stretched between the R route roller 39 and the copy paper conveyed by the return route 35 is held between the auxiliary route guides 38 and 40 and fed to guide plates 41° and 41'. be done. The guide plates 41 and 41' are the second
A pair of reversing rollers 42, 42' are provided at the rear end. These reversing rollers 42, 42' rotate (hereinafter referred to as reverse rotation) so as to feed the single-sided copy paper that has been guided between the guide plates 41 and 41' into the second paper feed cassette 4.
Alternatively, the carriage 2 can be rotated in a direction away from the paper feed cassette 4 (hereinafter referred to as normal rotation).

To explain double-sided copying of copy paper using the copy paper conveying device with the above configuration, as shown in FIG. The second paper feed cassette 4 is an empty cassette in which copy paper is not fully stored. In this state, the copy paper A stored in the first paper feed cassette 3 and pushed up by the lever 16 is fed from the first paper feed cassette 3 by the paper feed roller 15. This fed copy paper is transported by a pair of guide plates 17, 17' and transport rollers 18, 1.
8', guide plate 19.19', conveyance roller 20.20
, and guide plates 21 and 21', the image is transferred by a pair of conveying rollers 22, 22' so as to be brought into close contact with the photosensitive layer of the photosensitive drum 6 facing the transfer corona discharger 13. After the transfer is completed, the copy paper is transferred to the transport roller 23,
23', the image is sent to the fixing device 25 and fixed thereon.

The fixed copy paper passes through transport rollers 26 and 26' and comes into contact with a transport direction switching plate 27. In this case, the conveyance direction switching plate 27 has been previously rotated about the pivot shaft 27a by a command signal in a direction in which the upper side, that is, the oblique side 27b faces the conveyance rollers 26 and 26'.
The copy paper sent out horizontally by 6' comes into contact with the conveyance direction switching plate 27, branches, and is guided vertically downward, and is guided by guide plates 28 and 28' as shown in FIG. The paper is placed on the return belt 35 by the forward rotation of the transport direction control rollers 29, 29'. At this stage, the copy paper is reversed. In other words, one side of the copy will be returned x route 35
One side, which has not yet been copied, is exposed.

As shown in FIG. and the second
Guide 9 plate 41 attached to the paper feed cassette 4 of
, 41', and a pair of reversing rollers 42, 42'.
guided by. And this pair of reversing rollers 42, 42
”, the leading edge of the copy paper A is rotated forward by the reversing roller 42.
．． 42' and its rear end is still the reversing roller 4.
2, 42', the reversing roller 42
, 42' are reversely rotated by a command signal, and the copy paper A is transferred to the second paper feed cassette 4 with the uncopied side facing up.
send to.

Next, in order to copy this one side that has not been copied yet, the conveying direction switching plate 27 is rotated in parallel to the conveying direction of the copy paper in response to a command signal. That is, it is displaced to the position shown in FIG. Then, the paper feed roller 43 feeds the copy paper pushed upward by the lever 44 from the second cassette 4.

The fed copy paper is guided by guide plates 45, 45' and led to conveyance rollers 20, 20', transferred and fixed via the thread path mentioned above, reaches conveyance rollers 26. As shown by the imaginary line in the figure, the sheet passes over the transport direction switching plate 27 without coming into contact with the transport direction switching plate 27, and is fed into the copy tray 5 by the discharge rollers 46, 46'. In this way, double-sided copying can be completed.

In this way, during double-sided copying, for example, in a document such as a book whose pages are aligned sequentially, copying may end at the odd-numbered page. In this case, the final copy can be made on only one side, but it becomes necessary to invert and align the pages on the copy tray 5.

In order to reverse the sheet, the return belt 35 in the auxiliary machine frame 32 feeds the single-sided copy sheet to the second sheet feed cassette 4. The document must be removed from the second paper feed cassette 4 to make a hidden copy, which is time consuming and troublesome. In order to avoid such trouble, copy paper fed from the first paper cassette 3 and copied on one side is fed from the first paper cassette 3 and copied on one side, as shown in FIG. The paper is pulled out by the pull-out rollers 26, 26' as shown in the imaginary line, comes into contact with the conveyance direction switching plate 27, and is guided downward, and then returned (sent to the route 35) by the conveyance direction control rollers 29, 29'. , the leading end of the copy paper has moved away from the transport direction control roller 29°29' and is in contact with the return silt 35, but the trailing end is still being held by the transport direction control roller 29°29'. ,
By rotating the conveyance direction control rollers 29, 29' in the reverse direction, the copy paper is guided from the conveyance direction control rollers 29, 29' to the discharge roller 46, 46', and is fed into the copy tray 5 in an inverted state. This will allow you to align them.

By the way, in this way, the conveyance direction control roller 29°29'
By rotating in the opposite direction, the reversed copy paper can be immediately fed into the copy tray 5 without being fed into the second paper feed cassette 4. is in contact with the return belt 35, but the rear end is still in contact with the conveyance direction control roller 2.
9, 29', when the conveyance direction control roller 29°29' is reversely rotated, the return belt 35 advances toward the second paper feed cassette 4, and as a result, the image is The copied paper that has been transferred will be returned (Ruto 35
At this time, the image surface of the copy paper rubs against the return route 35, causing the disadvantage that the image surface of the copy tube becomes dirty and unclear. In order to eliminate this inconvenience, there is a method in which the transport direction control rollers 29, 29' are rotated in the opposite direction and the return belt 35 is moved in the same direction as the copy paper, but the load on the return belt 35 itself is Because of the large size, there is a delay in the reverse rotation compared to the reverse rotation of the conveyance direction control rollers 29, 29', and there is a difficulty in controlling the copy paper in that it is difficult to reverse the copy paper and feed it into the copy tray 5. .

Therefore, as shown in FIG.
A return direction switching tool 30 is provided which can rotate left and right around . In the case of double-sided copying, a command signal causes the return direction switching tool 30 to be rotated to the left as shown by the solid line.
The single-sided copy paper that has been fed in is sent to the return route 35 via the return direction switching device 30. Or, when there is no need to feed paper into the second paper feed cassette 4, such as in the case of paper alignment, the return direction switching tool 30
is rotated in response to a command signal to the left about the pivot shaft 30a, that is, in a direction away from the return belt 35 as shown in the imaginary line, and connected to the return direction guide path 31, and the transport direction control rollers 29, 29 The leading end of the copy paper sent from ' is guided to the returning direction guide path 31 via the returning direction switching device 30, and the rear end thereof is still conveyed by the conveying direction control rollers 29, 29'.
At the stage where the transport direction control roller 29°2
9' is reversely rotated to eject the copy paper through the ejection rollers 46, 46' into the copy tray 5, the image surface of the copy paper will not rub against the return belt 35, and the return belt 35 will only move forward. Since it can be driven in a fixed direction, the control surface can be easily created.

(Effects of the Invention) As detailed above, since the present invention has the above configuration, it is possible to perform double-sided copying of copy paper, which was difficult in the past, and as a result, it is not possible to save copy paper and storage is also efficient. It became a target.

In addition, since the conveyance direction control roller can be rotated in forward and reverse directions, the copy paper can be reversed without returning the single-sided copy paper to the second paper feed cassette, which is effective for aligning paper edges, etc. .

Further, a return direction switching tool is provided between the transport direction control roller and the return tool R route, and by rotating the return direction switching tool, the copy paper sent from the transport direction control roller is controlled by the return direction switching tool. Since the image side of the copy paper that has already been copied on one side does not rub against the return tool,
It is possible to maintain the clarity of the image without smudging it, and since the return device only needs to be driven in one direction, there are advantages in that control is simple and costs are low.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which FIG. 1 is a simplified cross-sectional view of the copying machine in a reversed state, and FIG. 2 is a state in which the copying machine is reversed and the other side on which no image has been transferred is being copied. FIG. 2 is a simplified sectional view of the copying machine, and FIG. 3 is a simplified sectional view of the copying machine showing a state in which the copying machine is inverted and the other side on which no image has been transferred is copied. FIG. 4 is an explanatory diagram of the reversal state of the conveyance direction control roller. 3...First paper feed cassette, 4...Second paper feed cassette, 5...Copy tray, 29, 29'...Transportation direction control roller, 30
...Return direction switching tool, A... Copy paper. Applicant Sanda Kogyo Co., Ltd. Agent Patent Attorney Junya Suzuki Figure 3

Claims (1)

[Claims] Conveying direction control rollers 29, 2 that convey copy paper A supplied from the first paper feed cassette 3 and having an image transferred and fixed on one side in a commanded direction based on a command signal.
9', a return direction switching device 30 that switches the copy paper A sent to the transport direction control rollers 29, 29' in a predetermined direction, and a transport direction control roller 29.9' via the return direction switching tool 30. a return device 35 for returning the copy paper A sent from 29' toward the second paper feed cassette 4;
and a reversing roller 42,42' that sends the copy paper A fed through the return device 35 into the second paper feed cassette 4 in a reversed state so that the image is transferred to the other side. , when the conveyance direction control rollers 29, 29' rotate forward in accordance with the command signal, the return direction switching tool 30 is rotated toward the return tool 35 according to the command signal, and the copy paper A is returned to the return direction. When the copy sheet A is fed into the feeder 35 and the conveyance direction control rollers 29, 29' are rotated in the opposite direction, the return direction switching tool 30 is rotated in a direction away from the return tool 35 in response to a command signal. A copy paper conveyance device for a copying machine that feeds the paper to the copy tray 5 without contacting the return tool 35ζ.