JPS62191333A - Copying machine - Google Patents

Abstract

PURPOSE:To dispense with a paper discharger or the like as well as to miniaturize a device as a whole, by installing a partition plate which partition off an exposed original from an unexposed original in a paper feed cassette top and bottom in this paper feed cassette. CONSTITUTION:The number of desired sheets to be copied out of one sheet original is inputted into a preset counter 26. The counter 26 aand a switch 53 are being connected to an arithmetic and control circuit 27, form which each operation signal is transmitted to both clutches CL1 and CL2. A conveyor belt 19 is connected to a driver 28 via the clutch CL1 and a paper feed roller 31 via the clutch CL2, respectively. These clutches CL1 and CL2 operate as much as the number of sheets of a sheel original S being housed in a paper feed cassette 15, and simultaneously with this, a fact that the sheet original S runs out beneath a partition plate 43 is detected by the switch 53, thereby making the arithmetic and control circuit 27 operate a solenoid 52, and the partition plate 43 is retracted from the paper feed cassette 15.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling the transport of a sheet-like object, and more particularly to a method for controlling the transport of a sheet original, a transfer sheet, a recording sheet, etc. in a copying machine or the like.

Conventionally, paper was fed from a single container of sheet-like material.

1 in the case of a sheet that is sent into a processing device and once processed is fed into the same processing device again.
The following were considered. One is to feed the sheet-like material from the paper feed tray to the processing device.

The processed sheets are discharged and stacked on the paper output tray, and after all the sheet materials have been discharged, the sheets on the paper output tray are transferred to the paper feed tray and fed again. The other method is to send out the sheet from the paper feed tray, process it in a processing device, and then output it onto a paper output tray that also serves as the paper feed tray. This method involves feeding the paper again. In the former case, it is necessary to transfer the sheet-like object on the paper discharge tray to the paper feed tray, which is a laborious task. In addition, both require a paper ejection tray separate from the paper feed tray, and the latter in particular requires a separate paper feed means such as a paper feed roller, which is very expensive.
The space they occupied also needed to be large. Therefore, the present invention solves the above-mentioned drawbacks by feeding sheet-like materials one by one toward a processing device from a container containing a predetermined number of sheet-like materials, and placing a partition plate on top of the stored sheet-like materials. The sheet-shaped bodies processed by the processing device are returned to the container and stacked on the partition plate, and the sheet-shaped bodies on the partition plate are loaded into the container according to a preset number of times. It is designed so that the paper can be fed again by inserting the paper into the paper, and is characterized in that the partition plate is brought into contact with the upper surface of the sheet-like material by its own weight.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of a copying apparatus embodying the present invention, and reference numeral 1 indicates a sheet document automatic conveyance device. This sheet document automatic conveyance device 1 includes a paper feed cassette 2 and a paper feed roller 3 that feeds each sheet document in the paper feed cassette 2 one by one.
An endless belt 5 is rotatably provided on the upper part of the original platen 4 made of a transparent glass plate, and a belt 5 on the left side of the endless belt 5 is used to invert the sheet original and send it out again toward the original platen 4. 1 sheet conveyance device 6;
On the right side of the endless belt 6, there is a second sheet conveying device 7 for conveying the sheet original sent out from the endless belt 5 to the paper feed cassette 2.

Inside the paper feed cassette 2, double-sided sheet originals S are stacked and housed in page order with the first page facing upward. An opening is formed at the bottom tip of this paper feed cassette, and a paper feed roller 3 is provided correspondingly to this opening to feed sheet originals S from below.
Feed each sheet. The fed sheet original S is fed into a nip formed by the endless belt 5 and the original placing table 4.

The endless belt 5 is adjusted to start rotating at the same time as the paper feed roller 3 starts rotating, or when it detects that a sheet document is fed from the paper feed cassette 2. At first, the endless belt 5 rotates at a constant speed in the direction of the solid arrow as shown in the figure.

This endless belt 5 is composed of a plurality of band-shaped belts that are wound between two rollers 5a and 5b, and stoppers 5c and 5d are arranged between these belts.
The stopper 50 is in contact with the document mounting table 4, and engages with the leading edge of the sheet document S to stop its movement. On the other hand, the stopper 5d is lifted and is in a position where it does not interfere with the movement of the sheet document. Rotation of the endless belt 5 stops at the time when the sheet original S engages with the stopper 50, and then the exposure operation starts. The exposure bag @ 8 moves parallel to the original table 4 at a speed ratio of 1:1/2. The first reflecting mirror 9 is composed of a second reflecting filO, an in-mirror lens 11, and a third reflecting mirror 12. There is. first and second reflecting mirrors 9;
10 moves in the direction of the arrow to expose the sheet original S on the original table 4, and 9', respectively.

After moving forward to position 10', it returns to the initial position.

The photoreceptor 13 is moving at a speed in the direction indicated by the arrow V, and an electrostatic latent image corresponding to the sheet original S is formed on its surface, and after this is visualized, it is transferred to the first side of the transfer paper. Transcribe.

The exposed sheet original S is sent to the first sheet conveying device by the endless belt that is rotated again. The sheet conveyance device 6 is configured to invert the sheet document S and convey it again toward the document a placement table 4, and has a pair of paper feed rollers 6a and 6b. When the sheet document reaches the paper feed rollers 6a and 6b, its conveyance is temporarily stopped, and when the endless belt 5 starts rotating in the reverse direction in the direction of the dotted line arrow in the figure in preparation for the next exposure, the conveyance of the sheet document S is restarted. At this time, the stopper 50 is in the inactive position, and the stopper 5b is in the active position to stop the movement of the sheet document S. The sheet original S is placed with its second side facing the original placing table ei, and is similarly exposed and scanned by the exposure device 8. The image corresponding to the second surface of the sheet document S formed on the photoreceptor 13 is transferred to the back surface of the same transfer paper on which the transfer was previously performed. In this way, duplex copying of the double-sided sheet document S onto both the front and back sides of the transfer paper is completed.

On the other hand, the sheet original S, which has been completely exposed, is sent to the second sheet conveying device 7 by the endless belt 5, which has started rotating again. The second sheet conveying device 7 is composed of a conveying belt 7a that conveys the sheet original S upward and a plurality of rollers 7b. The sheet document S is reversed once by the sheet conveyance device 7 and returned to the paper feed cassette 2 again.

By the way, a partition plate 14 is attached to the rear end portion of the paper feed cassette 2. This partition plate is located above the temporary sheet originals S stored in the paper feed cassette 2, and the sheet originals S from the second sheet transport device 7 are placed together with the unexposed sheet originals. It is differentiated so that it does not become

Then, the remaining double-sided sheet originals S are stacked in page order on the partition plate 14 with the first page facing upward through the same process.

When the last sheet original S is sent out from the paper feed cassette 2 and it is confirmed that no sheet original S exists under the partition plate 14, the copying process of the predetermined cycle is completed.

Next, a case will be described in which a plurality of copies are obtained from a single sheet original. If the double-sided copying machine is not equipped with a sorter device, by repeating the above copying cycle a predetermined number of times, copies arranged page by page in the same order as the number of repetitions will be produced. That is, when it is detected that there is no sheet original S under the partition plate 14 and a repeat command is received from a preset counter (not shown), the partition plate 14 is retracted from above the paper feed cassette 2, and The group of sheet documents S stacked thereon is completely accommodated in the paper feed cassette 2 in preparation for the next paper feed. By repeating this operation, a plurality of double-sided copies can be obtained.

On the other hand, when a sorter device is installed or when it is desired to circulate the sheet original S only once, when the sheet original S is placed on the original placing table 4, the exposure device 8 rotates the sheet original S by the number of repetitions. To complete exposure of the same page at one time. With this method, the sheet document S is not fed from the paper feed cassette 2 many times, so the chances of it being scratched or damaged are reduced. However, if there is no sorter device, sorting is required when binding the books after copying is complete.

Next, when performing double-sided copying or single-sided copying from a book original such as a book, use the endless bell h5, which is a part of the sheet original automatic conveyance device l. It is provided so as to be able to rotate around an appropriate part as a center of rotation so as to be retracted from the top of the X table 4, thereby making it possible to copy a book original.

FIG. 2 shows an embodiment of the invention.

In the figure, sheet originals S are stored in the paper feed cassette 29 in page order with the first page facing upward. The sheet originals S are fed sheet by sheet by a sheet feeding roller 31 starting from the lowest one. The fed sheet original S passes through the exposure section 18 via conveyance rollers 17 and 17. A conveyor belt 19 rotates above the exposure section 18 to convey the sheet original S and bring it into close contact with the exposure section 18 . The sheet original S is exposed to light by an exposure lamp, and a light image thereof is projected onto a photoreceptor by an exposure optical system (not shown). After the exposed sheet original S is reversed once by a sheet conveying belt and a plurality of conveying rollers as shown in FIG.
The sheets are stacked in the paper feed cassette 29 with the exposed side facing upward. By the way, a partition plate 43 is attached to the rear end portion of the paper feed cassette 29 to distinguish between exposed sheet originals S and unexposed sheet originals S.

The partition plate 43 has one end fixed to the shaft 44.
is rotatably supported by the support arm 45. A cam plate 46 is fixed to one end of the shaft 44. On the other hand, the L
The letter-shaped lever 49 has one end connected to a spring 50a.

50b, and a pin 51 is provided at the other end, and this pin 51 is configured to engage with the cam plate 46. When the solenoid 52 attached to one end of the spring 50a is in the OFF state, the lever 49 is in the solid line position due to the action of the spring 50b, and the pin 51 is disengaged from the cam plate 46. Therefore, the partition plate 43 rests on the sheet document S in the paper feed tray 29 due to its own weight. When the sheet document S is fed by the paper feed roller 31, the partition plate 43 descends due to its own weight, and when all the sheet documents S in the paper feed tray 29 have been fed, the partition plate 43 of the paper feed tray bottom plate 29c is lowered.
3 and presses the microswitch 53 provided within the passage.

The sheet original S stacked on the partition plate 43 and already subjected to predetermined processing is again placed on the paper feed tray 29 in preparation for the next paper feed. By the way, if further paper feeding operation is required based on the signal from the microswitch 53 and the signal from the preset counter, the solenoid 52 is energized and the spring 50a is activated to rotate the lever 49 clockwise, and the pin 51 is engaged with the cam plate 46, and the partition plate 43 is similarly rotated clockwise so that it is placed on the sheet document S on the paper feed table 29 by its own weight.

Next, control of each of the above-mentioned devices will be briefly explained. First, the desired number of copies to be made from one sheet original is input into the preset counter 26. Preset counter 2
6 and the switch 53 are connected to an arithmetic control circuit 27, and from this arithmetic control circuit 27, the clutches CL, ,
An operation signal is sent to each Cl3. The conveyor belt 19 is connected to a drive device 28 via a clutch CLI, and the paper feed roller 31 is connected to a drive device 28 via a clutch CL2. Clutches CL+ and Cl3 operate as many times as the number of sheet originals S stored in the paper feed cassette 15, and at the same time, the switch 53 detects that there are no more sheet originals S under the partition plate 43, and the arithmetic control circuit 27 Then, the solenoid 52 is operated to retract the partition plate 43 from above the paper feed cassette 15. Thereafter, the number of signals from the switch 53 is compared with the preset counter 26, and when a predetermined copy is obtained, the copy is automatically stopped. In addition, when obtaining n double-sided copies from n double-sided sheet originals, it goes without saying that the copying operation will stop when the number of signals input from the light receiving element to the arithmetic control circuit is 20. .

As described above, according to the present invention, a sheet-like object such as a sheet original, a transfer sheet, or a recording sheet is fed from a paper feed stand or a paper feed cassette toward the processing device, and the same sheet-like object is processed again in the same manner. In devices that repeatedly feed paper into the device, a partition plate is provided on the top of the paper feed table or paper cassette to separate unprocessed sheets from unprocessed sheets, and to separate processed sheets from the same paper feed. Paper feeding and
Since the sheet can be transported, there is no need for a sheet discharge device, an intermediate sheet feeding device, etc. in addition to the sheet feeding device, and the entire device can be downsized and a very inexpensive device can be provided. Furthermore, the transport of the sheet-like object is simplified, and the presence or absence of the sheet-like object is detected by using a partition plate that contacts the sheet-like object under its own weight, and the desired copying can be carried out fully automatically by simply instructing the number of repetitions. can perform actions.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a double-sided copying apparatus showing an embodiment of the present invention, FIG. 2 is a cross-sectional view of a sheet feeding device showing an embodiment of the present invention, and FIG. 3 is the same as that of FIG. FIG. 2.29...Paper feed cassette, 3,31...Paper feed roller, 26...Preset counter, 27...
...Arithmetic control circuit, 43...Partition plate, 53...
...Switch, S...Sheet original,

Claims (1)

[Scope of Claims] A paper feed cassette that accommodates a plurality of originals; a sheet separation and feeding means that separates the originals in the paper cassette from the bottom one by one and feeds them to an exposure section; and the exposure unit. a document transport path for inverting the exposed original in the section and guiding it above the paper feed cassette; and a member for dividing the exposed original and the unexposed original in the paper feed cassette into upper and lower parts in the paper feed cassette. a partition plate that is rotatable around a shaft and is pressed against the unexposed original in the paper feed cassette by its own weight, and rotates by its own weight when the unexposed original is no longer in the paper feed cassette; and a switch that is disposed in a passageway in which the partition plate rotates under its own weight and is activated by the rotation of the partition plate, and when the switch is activated, the partition plate is moved in the same direction as the rotation direction due to its own weight. , and a partition plate drive means that rotates the partition plate by its own weight to a position where it returns to the partition position again; a preset counter that sets a desired number of copies to be made from one sheet original; and the partition plate drive device when the switch is activated. and an arithmetic and control circuit that issues an operation command to the arithmetic and control circuit, and compares the number of signals sent from the switch to the arithmetic and control circuit with the number of sheets set in the preset counter, and separates the sheets when a predetermined number of copies has been obtained. A copying machine characterized by stopping feeding of a document by a feeding means.