JPS62298274A - Original rotating type copying machine - Google Patents

Abstract

PURPOSE:To change the distance of rotation of the peripheral face of an original cylinder to an optical system device during copying process and to read an image over the whole surface by changing rotational frequency of an original cylinder of copying process according to the length in the direction of original feeding. CONSTITUTION:When an RAM 23 is cleared by a power source ON, warming up is started simultaneously, and when warming-up is completed, inputting of copy data becomes possible. Then, copy data and mode are set and inputted by key operation on an operation panel 31. At this time, detection data of an original length detecting sensor 8 are inputted and stored in the RAM 23. When a print switch 35 is operated under this state, copying process in which the original cylinder makes one rotation is made when the original length detecting sensor 8 is OFF, and copying process in which the original cylinder makes two rotation is made when the sensor is on. Thus, according to the result of checking of the original length detecting sensor 8 on an original tray 7, the copying process is continued while the cylinder makes two rotation for the length exceeding the circumference of the original cylinder 1, and the reading of the image over whole surface of the original is made possible.

Description

Detailed Description of the Invention 3. Technical Field for Detailed Description of the Invention This invention involves wrapping a sheet-like original around the circumferential surface of an original cylinder, and rotating the original cylinder at a position facing an optical system device. The present invention relates to an original rotating type copying apparatus that scans an image of an original using an optical system device.

<Summary of the Invention> In summary, the document rotation type copying apparatus according to the present invention includes a document length detecting means for detecting the length of the document in the document feeding direction;
By providing a document cylinder rotation control means for controlling the number of rotations of the document cylinder so that the rotation distance of the document cylinder circumferential surface exceeds the detection value of the document length detection means during one copying process, the document feeding of the document is improved. This makes it possible to read the image of a document whose length in the direction exceeds the outer circumference of the document cylinder, and to perform copying work regardless of the size of the document.

<Prior Art and Its Disadvantages> A document rotation type copying device is equipped with a document cylinder that wraps a document around its circumferential surface, and rotates the document cylinder with the document wrapped around it in a position facing an optical system device. Scan the original image. At this time, since the original cylinder rotates once in one copying process with the entire surface of the original wrapped around the peripheral surface of the original cylinder, the maximum size of the original that can be copied is determined by the diameter of the original cylinder. However, increasing the diameter of the document cylinder increases the overall shape of the copying device and requires a large driving force to rotate the document cylinder, leading to an increase in cost.

For this reason, in conventional document rotary copying devices, the diameter of the document cylinder cannot be made very large, and if a document larger than the maximum document size that can be copied determined by the document cylinder diameter is wrapped around the document cylinder. , the trailing edge of the original is located above the leading edge of the original, making it impossible to remove the original from the cylinder and making it impossible to read the entire image. In this way, in conventional document rotary copying devices, the size of the document that can be copied must be less than or equal to the length of the outer circumferential surface determined by the diameter of the document cylinder.
There was a drawback that large originals could not be copied.

<Object of the Invention> In view of the above-mentioned conventional drawbacks, an object of the present invention is to improve the optical system apparatus during the copying process by changing the rotation speed of the document cylinder in the copying process according to the length of the document in the document feeding direction. By changing the rotational distance of the circumferential surface of the document cylinder relative to the distance, it is possible to read images over the entire surface of documents whose length in the document feeding direction is longer than the length of the circumferential surface of the document cylinder without increasing the size of the device or increasing costs. The object of the present invention is to provide an original rotary copying device that can perform the following operations.

<Configuration and Effects of the Invention> The original rotary copying apparatus of the present invention has a rotatable original cylinder that wraps around the circumferential surface of the original fed from the original tray, at a position facing a fixed optical system device. In an original rotary copying machine that scans an image of an original onto an optical system device, the original length detecting means detects the length of the original in the original feeding direction of the original placed on the original tray; The present invention is characterized in that it is provided with original cylinder rotation control means for making one copying process during which the original cylinder rotates the number of times that the rotation distance of the cylinder circumferential surface exceeds the detection value of the original length detection means.

With the above configuration, the document length detection means detects the length of the document placed on the document tray in the document feeding direction.

In one copying process, the document cylinder rotation control means rotates the document cylinder so that the rotation distance of the circumferential surface exceeds the length of the document in the document feeding direction detected by the document length detection device.

As described above, according to the present invention, the length of the original to be copied in the original feeding direction is detected by the original length detecting means, and the rotation speed of the original cylinder can be changed in accordance with the detection result. When the rotational speed of the document cylinder changes, the rotational distance of its circumferential surface with respect to the optical system device changes, and the length of the document wrapped around the circumferential surface in the document feeding direction also changes. Therefore, for documents that are long in the document feeding direction, by increasing the number of rotations of the document cylinder, the entire image can be scanned by the optical system, and the size of the document that can be copied is the diameter of the document cylinder. Not defined by. Therefore, in order to make it possible to copy large-sized originals, it is necessary to increase the size of the original cylinder, which prevents the apparatus from becoming larger and increasing costs.

<Embodiment> FIG. 1 is a schematic front sectional view showing the main parts of a document rotary type copying apparatus which is an embodiment of the present invention.

An exposure platen 2 made of a transparent hard glass plate is provided above the optical system device 16.

A document cylinder 1 is rotatably provided above the exposure platen 2. A document tray 7 is mounted with one end inserted between the document cylinder 1 and the exposure platen 2. A document feed bell 1-5a and a document feed roller 6b are provided on the document cylinder 1 side of the document tray 7. The document tray 7 is equipped with a document length detection sensor 8 . The distance between the document length detection sensor 8 and the document charger 3 is slightly shorter than the circumference of the document cylinder 10.

Further, a document charger 3 is provided between the end of the document tray 7 and the exposure platen 2 so as to face the circumferential surface of the document cylinder 1 . Further, the original cylinder 1 is rotated in the direction of arrow A by a driving force transmitted by a cylinder motor (not shown).A slit plate 10 is fixed coaxially to the original cylinder 1, and a slit plate 10 is provided on the outer periphery of the original cylinder 1. The slit 10a is detected by the photosensors 11 and 12, and the operating state of the document cylinder 1 is known.

A document guide 13 is provided near the document cylinder 1 in a rotational direction from the exposure platen 2. This manuscript guide 1
3, a document conveying path 13a is configured from the exposure platen 2 to above the document tray 7. A document discharge roller 4 is provided at the end of the document guide 13 on the document tray 7 side. A paper discharge guide 14 is swingably provided near the document discharge roller 4 . When the paper ejection guide 14 is positioned as shown by the solid line, the leading edge of the ejected document is guided to the feeding roller 6b. As a result, the original is ejected while being placed on the original tray 7.

When a solenoid (not shown) is turned on, the paper discharge guide 14 swings in the direction of arrow B and is positioned at two points fAyA in the figure. At this time, the trailing edge of the document being ejected is the feeding roller 6b.
Guided to the side, the original is placed in the original tray 7! ! It is then turned over and ejected.

FIG. 2 is a block diagram of a control section of the original rotary copying apparatus.

The ON data of each key provided on the operation panel 31 is input to the CPU 21 from the I10 interface 24 . The operation panel 31 is provided with a set number of sheets input key 32, an original number input key 33, a mode key 34, a print switch 35, etc. Copy data is input and the mode is set by operating these keys. . Furthermore, detection data from the document length detection sensor 8 and the photosensors 11 and 12 are inputted to the CPU 21 from the I10 interface 24. The copy data and detection data input to the CPU 21 are stored in respective memory areas of the RAM 23. The ROM 22 also stores programs for operating each device based on input data.

The CPU 21 outputs control data for each device from the I10 interface 25 to the drive array 27 according to the program stored in the ROM 22.

Devices connected to the drive array 27 include, for example, a cylinder clutch 41, a cylinder brake 42, a document charger 3, a document feed latch 44, and a document peeling solenoid 4.
5, a cylinder motor 46, a paper feed clutch 47, etc. Cylinder clutch 41 selectively transmits the driving force of cylinder motor 46 to document cylinder 1 . The cylinder brake 42 stops the rotation of the document cylinder 1. The document charger 3 applies corona discharge to the document wrapped around the document cylinder 1, and causes the document to be electrostatically attracted to the circumferential surface of the document cylinder 1. The document feed latch 44 selectively drives the feed belt 6a and the feed roller 6b, and guides the document placed on the document tray 7 toward the document cylinder 1. It is brought into selective contact with the outer circumferential surface of the document cylinder 1.The paper feed clutch 47 drives a paper feed means provided in a paper feed section (not shown), and guides the paper sheets one by one to the copying process section.

FIG. 3 is a flowchart showing the operation of the original rotary copying apparatus.

When 14m is turned on, the memory area of RAM 23 is cleared and warming-up is started (
nl, n2). When warming up is completed, copy data can be input. The operator uses the operation panel 31
Copy data and mode are set and input by operating keys such as the set number of sheets input key 32 provided on the machine. Also, at this time, detection data from the document length detection sensor 8 is input (n3, n4). Each input data is stored in RAM23
stored in the memory area within.

If the print switch 35 is operated in this state (n5
), the detection data of the document length detection sensor is checked, and
When the document length detection sensor 8 is in the OFF state, Riko performs the copying process by rotating the document cylinder 1 once, and when the document length detection sensor 8 is in the ON state, the document cylinder 1 is rotated once.
A copying process is performed in which the image is rotated twice (n6 to n8). These n6 to n8 correspond to the document cylinder rotation control means of the present invention.

The single revolution copying process described above is shown in detail in FIG. First of all, n21. At n22, turn on the cylinder motor (CM) 46 and cylinder clutch (CC) 41, and turn on the original cylinder 1.
Rotate. When the photosensor 11 is turned on at n23, n
Proceed to step 24, turn on the cylinder brake (CB) 42,
The rotation of the original cylinder 1 is stopped. Next, at n25, the document feed latch (DFC) 44 is turned on to drive the feed belt 6a and feed roller 6b to start feeding the document.

When the leading edge of the fed document reaches the document sensor 15 and the document sensor 15 is turned on, the document charger (DC) 3 and cylinder clutch (CC) 4 are activated at n27 and n28.
Turn on 1. As a result, the fed document is attracted to the surface of the document cylinder 1. In this state, the document cylinder 1 continues to rotate, and the image of the document is scanned by the optical system device 16.

The rotation of the document cylinder 1 continues for m, and when the photo sensor 10 is turned on at n29, the process proceeds to n30, where the document separation solenoid (DSS) 45 is turned on. As a result, the original peeling claw 5
comes into contact with the circumferential surface of the document cylinder 1. Therefore, the original that has reached the original peeling claw 5 is peeled off from the circumferential surface of the original cylinder 1.
The document guide 13 guides the document toward the discharge roller 4 .

Thereafter, when the photosensor 11 is turned on at n31, the process proceeds to n32, where the cylinder brake (CB) 42 is turned on and the copying process is ended.

Further, the details of the two-rotation copying process will be explained with reference to the flowchart of FIG. In FIG. 5, n41 to n50 are equal to n21 to n30 shown in FIG. After turning on the document separation solenoid (DSS) 45 at n50, n51 to n5
3, it waits for photosensor 11, photosensor 12, and photosensor 11 to be turned on in sequence. That is, n48
Turn on the cylinder clutch (CC) 41 and check that the original cylinder 1 rotates twice after it starts rotating. When the photo sensor 11 is turned on at n53, the process proceeds to n54, where the cylinder brake (CB) 42 is turned on and the copying process ends.

When the one-rotation copying process or the two-rotation copying process is completed at n7 or n8 shown in FIG. 3, it is determined whether or not there is an uncopied original in the original tray 7. If there are originals, repeat the copying process until there are no more uncopied originals (n 9-n 6-n 7. n
8).

FIGS. 6 and 6B are timing charts of each device constituting the original rotary copying apparatus.

During the one-rotation copying process, as shown in FIG. The replication process is executed. Also, during the two-rotation copying process, as shown in the same figure (Bl), the document feed latch (DFC) 44
After turning on the photosensor 12 and photosensor 11
The copying process is carried out while each of is turned on twice, that is, while the document cylinder I rotates twice. As described above, the length of the original is checked by the original length detection sensor 8 provided on the original tray 7, and if the length of the original to be copied exceeds the circumference of the original cylinder 1, the original cylinder 1 is The copying process continues during two rotations, and images can be read over the entire surface of the document.

In this embodiment, the number of rotations of the document cylinder is set to one or two times, but when copying a document whose length is more than twice the circumference of the document cylinder, the number of rotations of the document cylinder is three or more times. It is also possible to perform one copying process continuously during this period. In this way, the diameter of the document cylinder can be made small, and the copying apparatus can be made smaller.

[Brief explanation of the drawing]

FIG. 1 is a schematic front sectional view showing the configuration of an original rotary type copying apparatus which is an embodiment of the present invention, FIG. 2 is a block diagram of the control section of the same original rotated type copying apparatus, and FIGS. 3 to 5 are A flowchart showing the operation of the original rotary copying device, FIG.
(Bl is a timing chart of each device constituting the original rotary copying apparatus. 1-Original cylinder, 7-Original tray, 8-Original length detection sensor, 16-Optical system device.

Claims (1)

[Claims] (1) A document cylinder that is rotatable and wraps the original fed from the document tray around its circumferential surface is provided at a position facing a fixed optical system device, and the original cylinder is rotated to scan the image of the document onto the optical system device. In the type copying apparatus, the document length detection means detects the length of the document placed on the document tray in the document feeding direction; an original rotation type copying apparatus, comprising: original cylinder rotation control means for controlling a period during which the original cylinder rotates a number of times exceeding a detected value as one copying process.