JPH0197969A - Image forming device - Google Patents

Abstract

PURPOSE:To improve handling by partially reading a large-scaled original at least twice or above based on a placing instruction means while holding recording paper in a holding means and forming the read information into an image on the recording paper according to the reading order when the large-sized original larger than the read-enabled area of an original reading means is formed into a reduced image. CONSTITUTION:When the large-sized original 50 larger than the read-enabled area of the original reading means 4 is formed into the reduced image, the large-sized original 50 is partially read at least twice or above based on the placing instruction means 51-54 in a state where the recording paper 14 is held in the holding means 20 and the read information is formed into the image on the recording paper 14 according to the reading order, so that the image can be formed on a piece of the recording paper 14 even in case of the large- sized original 50. Thus, it is unnecessary to stick the recording paper with each other, and the thickness of the recording paper becomes equal. Thus, handling can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an image forming apparatus that forms an image by reducing a large document that is wider than the readable area of a document reading section in a copying apparatus or the like.

(Prior art) Generally, in image forming devices such as copying machines, the original to be read is reproduced on recording paper at the same size. It matches the recording paper.

For example, if A3 size recording paper can be fed, the document readable area is approximately equal to A3 size. The magnification that reduces or enlarges the original is within a size range where the original can be completely read by the original reading unit (the original is smaller than the size of the original table), and part of the printer can feed it. This was possible within the range of recording paper.

However, in the case of regular black-and-white copying machines, most of the originals are up to A3 in size, so it would be fine if the original reading section could read up to A3, but it is difficult to read multicolor originals. There are many maps and wiring diagrams that are larger than A3 size.

Therefore, if you want to reduce and copy a document whose size is larger than the document reading unit, keep the reduction ratio constant,
It was necessary to divide the manuscript into parts and copy them, paste the resulting copies together, and then cut the recording paper to the desired size.

That is, as shown in FIGS. 10 and 11, A1 original 1
50 divided into A3 size pieces.

b, , c, dc7) parts a-1, b-1, c − respectively
1, A3→A5RRR based on the point indicated by d-1
Make a reduced copy of R a , b , c , d
The A3 size copy 151 shown in FIG. 11 was created by pasting these together to obtain the desired copy.

(Problem to be Solved by the Invention) However, in the case of such conventional technology, when an attempt is made to reduce and reproduce a document whose size is larger than the readable area of the document reading section, the document is partially reproduced at the desired reduction ratio. Since it is necessary to reproduce the image in a reduced size and then paste the formed copies together, there are cases where there is a shift during pasting and the pasting becomes thick in some parts, which may cause problems in use.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the conventional example, and its purpose is to eliminate unnecessary labor and practical use when forming an image by reducing the size of a document larger than the document reading section. An object of the present invention is to provide an image forming apparatus that eliminates the above disadvantages.

(Means for Solving the Problems) In order to achieve the above object, the first invention of the present invention includes a document reading means for scanning and reading a document; The document reading means includes a placement instruction means for indicating a reference for placing the document on the document reading means, an image forming means for forming an image on the recording paper, and a holding means for holding the recording paper when one image is formed. When forming a reduced image of a large original larger than a readable area, with the holding means holding the recording paper, partially reading the large original at least twice or more based on the placement instruction means; It is constructed by forming an image of the read information on the recording paper according to the reading order.

In order to achieve the above object, a second aspect of the present invention provides a document reading means for scanning and reading a document, and a standard for placing the document on the document reading means. an image forming means for forming an image on recording paper; a storage means for storing image information having an area approximately equal to the original reading area; and an image obtained from the original reading means in the storage means. control means for sending information to the image forming means, and when forming a reduced image of a large original larger than the original reading area, the original readable area of the original is divided at least twice or more based on the placement instruction means. The image information is read by the control means and stored in the storage means by the control means.

(Function) In the first invention having the above configuration, when forming an image by reducing the size of a large original that is wider than the readable area of the original reading means, the recording paper is held by the holding means and the loading instruction is issued. By partially reading a large document at least twice or more based on the method and forming an image on the recording paper using the read information in accordance with the reading order, it is possible to form an image on a single sheet of recording paper even with the large document. This is what I did.

Further, in the second invention having the above configuration, when forming a reduced image of a large original that is wider than the original reading area, the original readable area of the original is divided and read at least twice based on the storage instruction means, and this image is Information is stored in a storage means by a control means, and image information is sent to an image forming means, so that even a large original can be imaged on a single sheet of recording paper.

(Example) The present invention will be explained below based on the illustrated example. 1st
The figure shows a multicolor image forming apparatus to which the first embodiment of the present invention is applied. In the figure, X is a document image input device (hereinafter referred to as league) as a document reading means, and Y is a color image recording device. First, the league, which is a device (hereinafter referred to as a printer) as an image forming means for forming an image on a material, will be explained.

The reader X is equipped with a document scanning optical system that scans the document by reciprocating. In the figure, O is the document, and 3 is the document table glass on which the document is placed. 4 is an image reading section, which includes an optical element 41;
, a reflecting mirror 42, an illumination lamp 43, and a light receiving element 44, which moves from position 4 to position 5 during document scanning and returns to position 4 again. The reading unit 4 is connected to the league body through a cable 6, and the read signal is transmitted through the league body.
The information is transmitted to the printer itself. Reference numeral 9 denotes a motor that drives the reading section 4, which transmits rotation to the pulley 7 via the timing belt 8 to move the reading section 4. The reading section 4 moves the distance indicated by the text in the figure.

Next, printer Y will be explained. Reference numeral 1 denotes a photosensitive drum constituting an image carrier, which rotates in the direction of arrow 2.

Around the photoreceptor drum l, a charger 12, a group of developing devices 13,
A transfer drum 20 and a cleaner 27 are arranged. 10
and 11 is a laser optical system that forms an image on the photosensitive drum l based on a signal from the reader X. 10 is a polygon mirror, and 11 is a laser reflecting mirror.

The developing device group 13 includes developing devices 131 of the same type that use yellow, magenta, cyan, and black developers, respectively.
, 132, 133, 134.

When forming an image of a specific color on the photosensitive drum 1, the developer 131, 132, 133 or 134 of that color is used.
forms an image adjacent to the photoreceptor drum l, and when forming an image of a different color, rotate in the direction of arrow 135 to bring the developing device of the desired color adjacent to the photoreceptor drum l.

15 is a cassette that stores recording paper 14 (normally plain paper is used). The recording paper 14 in the cassette 15 (hereinafter referred to as transfer paper) is sent out from the cassette 15 by a paper feed roller 16, passes through a second registration roller 17 and a second registration roller pair 18, and is sent to a paper feed guide 19. It will be done.

The transferred transfer paper 14 is timed by first and second registration rollers 17 and 18 as it passes, and its leading edge is gripped by a gripper (not shown) on the transfer drum 20. The gripped transfer paper 14 is transferred to an adsorption charger 23.
It passes between the squeezing rollers 22 and is suction-held over the entire area by the suction sheet 202 on the transfer drum 20 .

The image on the photosensitive drum 1 is transferred to the attracted transfer paper 14 by a transfer charger 24 . The transfer process is repeated for each color, and when the transfer is completed, the gripper opens and the separation claws 28 guide the transfer section 29. The transfer paper guided to the conveying section 29 passes through a pair of fixing rollers 30 and 31, is fixed, and is placed on the tray 32.

Note that 25 and 21 are cams that open and close the gripper on the transfer drum 20.

By the way, in this embodiment, the maximum readable area of the league is the product of the moving distance of the reading unit 4 and the length of the optical element 41 in the depth direction.Normally, this maximum readable area is used on a daily basis. It is determined by the size of the transfer paper, which is approximately A3 size. The transfer drum 20 that holds the transfer paper 14 is designed to hold a transfer paper (A3) of the same width as the maximum readable area, considering the maximum readable area. If you wish to reduce the size, use A4
While the transfer paper is held so that its longitudinal direction coincides with the circumferential direction of the transfer drum 20, the image reading section 4 moves at a speed that is a constant ratio (3 times) to the circumferential speed of the transfer drum 20, The document is read and the image information is transferred to A on the transfer drum 20.
4 transfer paper. This is the moving direction of the image reading unit 4, but the direction perpendicular to the moving direction is the moving direction of the image reading unit 4.
The information obtained is thinned out, A3 is converted to A4, and the information is transmitted.

Next, the operation of this embodiment will be explained based on FIGS. 2 and 3. In this embodiment, the document table glass 3 is approximately the same size as the transfer paper (for example, A3) that can be used in the apparatus. . 51, 52, 5 near each corner of the document platen glass 3.
A lighting lamp indicated by 3.54 is provided, and the lighting lamps 51 to 54 are storage indicating means for instructing the criteria for matching each corner of the large document 50 with the document table glass 3.
FIG. 2 shows a state in which small copying is performed according to the lighting lamps 51 to 54 shown in FIG. First, 50 A1 large manuscripts
In the middle, align the corner of a-1 of area a (A3) with the corner near the lit lamp 51, and press the copy button.
The document in the area a is read and an image is formed on the transfer paper 14 on the transfer drum 20. Then, the image is read in the area b.
The operation of 0 or more to match the corner where the lamp 52 is lit is also performed for areas c and d, and a reduced image is obtained on the transfer paper 14 on the transfer drum 20. In FIG. 2, the readable area is narrow with respect to the document platen glass 3, and the readable area is always set to the same size. In the second and subsequent reading operations, the portions LL and L2 in FIG. 2(b) are each corrected and read, and an image is formed to match the previously formed image. Here, even if the size of the non-reading area of each reading operation changes for each operation, there will be no problem as long as correction is made at each reading time. time until pressing) The transfer drum 20 may or may not be rotated.

In the above embodiment, the copy button is used as a start switch between each image reading, but the present invention is not limited to this. Good too.

Next, a second embodiment of the present invention will be described based on FIGS. 4 and 5. In FIG. 4, reference numeral 61 denotes an original table glass on which the original is placed, and an exposure scanning table 70 includes a fluorescent lamp 71 for exposing the original, a rod lens array 72 for condensing the reflected light from the original, and an exposure scanning table 70 for exposing the original to light. It has a solid-state image sensor 73 that converts a corresponding optical image into an electrical signal, and has two drive wires 7.
4.74 and moves forward or backward in the direction of the arrow. 7
Reference numeral 5 denotes a transmission line for drive signals and image signals for the solid-state image sensor 73, and is connected to a circuit of an image forming means (not shown). A reference member 76 is attached to one side of the exposure scanning platform 70, and is configured to be detected by a sensor 77 at a reference position (for example, a reading start position) of the exposure scanning platform 70. In other words, the position of the scanning table 70 is detected by the sensor 77. A drive motor 78 rotates the pulley 79. When the drive motor 78 is driven, the exposure scanning table 70 is moved through the pulley 79 and the wire 74. The image is read when the exposure scanning table 70 moves in the direction of the arrow A, and the direction B is the direction in which the scanning table 70 returns to its original position.

FIG. 5 shows the appearance of the document reading section 80 of the second embodiment,
In the figure, reference numeral 86 denotes a pressure plate that presses down the original, and is removable. The size of the document table glass 61 is approximately equal to A3 size, and the visible range of the document table glass 61 is the maximum document readable area of the document reading section 80 . 82~
Reference numeral 85 denotes lighting switches disposed at the four corners of the document platen glass 61, which also serve as placement instruction means. The original reading section 80 is connected to a printer part 92 serving as an image forming means spread over the ninth prisoner, and is capable of printing in accordance with the reading signal of the original reading section 80.

FIGS. 6 and 7 show A2→A3 according to this embodiment. AI-
, shows the procedure for reducing A3 size and how to memorize it □
FIG. 6(c) and FIG. 7(c) show the storage status of the memory. In FIG. 6, the vertex a of the original (A2 size) 100 is aligned with the lighting switch 82 designated as the reference position, the A3 size original is read on the original platen glass 61, the read image information is reduced, and the 9th 0 is stored in the memory 91 as a storage means by the control means 90 shown in the figure.Next, the vertex of the original 100 is set to the lighting switch 83, the original 100 is read in the same way as the previous time, and the memory 91 is stored in accordance with the previously stored information. It is remembered in ζ. Thereafter, all the information stored in the memory 91 is sent to the printer part 92 side, and a desired reduced copy can be obtained on -sheets of recording paper.

On the other hand, in FIG. 7, the apex a of the original (Al size) 110 is aligned with the lighting switch 82 designated as the reference position, and an A3 size original is read on the original platen glass 61.
Control means 90 reduces the read image information and shows it in FIG.
0 to be stored in the memory 91 by the original 11.
Align the apex of 0 with the lighting switch 83, read the original 110 as before, and read the original 110 in the memory 9 according to the information stored last time.
Store it in 1. That is, in FIG. 7, the original 110
8 and 9 show a flowchart and a block diagram for storing image information in the memory 91 by changing the position of the document four times with respect to the original table glass 61.
As shown in the figure.

Here, in the second embodiment, the storage area of the memory 91 is A
3 is shown, but in this case the size of the recording paper is A3 size, so in cases other than A3, it is sufficient to store the data in an area corresponding to each size.

In addition, in this embodiment, the lighting switches 82 to 85 arranged around the document table glass 61 can also be used as starting switches for starting reading when the standard of the document is aligned, and the desired reading operation can be performed. When this is completed, instructions are given in the always determined order of the first lighting switches 82 to 85.

(Effects of the Invention) The image forming apparatus according to the present invention has the above-described configuration and operation, and when forming an image by reducing a large original larger than the readable area of the original reading means, the image forming apparatus according to the present invention has a recording paper that is conventionally required. As a result, the thickness of the recording paper becomes uniform, the handling properties are improved, and reduced images can be easily obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a multicolor image forming apparatus to which the first embodiment of the present invention is applied, and FIGS. 2(a), (b), and (c) show the order of image reading and image formation in the same embodiment. Explanatory diagram, 3rd
The figure is an explanatory diagram showing the arrangement of lighting lamps in the same embodiment,
FIG. 4 is a perspective view showing the internal mechanism of a document reading section in a second embodiment of the present invention, FIG. 5 is a perspective view showing the external appearance of the document reading section, and FIGS. 6(a)' and (b). (c) is an explanatory diagram showing the order of image reading and image storage in the same embodiment, and FIGS. 7(a), (b), and (c) show other examples of the order of image reading and image storage in the same embodiment. Explanatory diagram, No. 8
9 is a block diagram of the control system in the same embodiment, FIG. 10 is an explanatory diagram showing the conventional reduced image forming order, and FIG. 11 is a copy created by the conventional example. FIG. Explanation of symbols 0...Original 3...Original table glass 4.
... Image reading section 14 ... Recording paper (transfer paper) 20 ... Transfer drum (holding means) 50 ... Large originals 51 to 54 ... Lighting lamp (placement instruction means) 61 ...
・Document table glass 80...Document reading unit (IK document reading means) 82-85・
... Lighting switch (placement instruction means) 90 ... Control means 91 ... Memory (storage means) 92 ... Part of printer (image forming means) X ... League (manuscript reading means) Y ...・Printer (image forming means) Figure 3 Figure 6 (Q) (b)
(c) Figure 8 Figure 9

Claims (2)

[Claims] (1) A document reading device that scans and reads a document, a placement instruction device that indicates standards for placing the document on the document reading device, and an image forming device that forms an image on recording paper. and a holding means for holding the recording paper during image formation, and when forming a reduced image of a large original larger than the readable area of the original reading means, the holding means holds the recording paper while the front An image forming apparatus characterized in that the large document is partially read at least twice based on a writing position instruction means, and the read information is formed into an image on the recording paper according to the reading order. (2) a document reading device that scans and reads the document; a placement instruction device that indicates standards for placing the document on the document reading device; and an image forming device that forms an image on recording paper. , comprising a storage means for storing image information having an area approximately equal to the original reading area, and a control means for sending the image information obtained from the original reading means to the storage means to the image forming means, When forming a reduced image of a larger original, the readable area of the original is divided and read at least twice based on the placement instruction means, and this image information is stored in the storage means by the control means. An image forming apparatus characterized by: