JPH04264438A - Copying machine - Google Patents

Abstract

PURPOSE:To exactly copy the copying-intended part of an inverted original on a regular size paper in the case of copying a part of the original having a size other than a regular size by a copying machine. CONSTITUTION:The lower surface of an original platen 2 is photographed by a photographing device below the original platen, and the size and the length/ width of the regular size paper which is selected by a paper feeding part are detected, then the video of the lower surface of the original platen and the position (a frame 13, etc.) of the selected regular size paper on the original platen are superimposed and displayed on a display part 11. For example, since the copying-intended part 0 of a large original (newspaper NP) corresponds to the part O' of the display part 11, the copying is executed by confirming that the part 0' corresponding to the copying-intended part O exists within the frame 13 of the selected regular size paper while viewing the copied surface of the original on the display part 11.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine.

0002

2. Description of the Related Art Conventionally, when attempting to copy an original of a size other than the standard size using a copying machine, especially when attempting to copy a part of an original larger than the standard size (for example, a newspaper) onto standard paper, the original Turn it over and, without knowing exactly where the target area is, mark the standard size mark (A4, B5, etc. marked along the edge of the document table) on the document table of the copying machine approximately. I had set down the manuscript with an idea. Then, when the original was actually copied, if the image of the target part was missing, the original was shifted and copied again using the copy as a reference to obtain the image of the target part of the original.

0003

[Problem to be solved by the invention] In this method of copying, the copy side of the original is facing down and the target part cannot be seen, so there are cases where the copy can be successfully made, but in general, the copying method is Problems often occur, such as parts of the document being missing, the entire document being copied diagonally, and the target section being pushed to the corner of the paper, resulting in the need to recopy many times.

[0004]Furthermore, in the case of models that are capable of masking and trimming, there is a problem in that even after masking and trimming operations, some deviation may occur and the image may be missing.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a copying machine capable of copying a portion of a document of a size other than standard size so that it fits perfectly on standard paper.

[0006]

[Means for Solving the Problems] The copying machine of the present invention includes a photographing device for photographing a document table from below, an image photographed by the photographing device, and a position on the document table corresponding to a selected sheet. , and a display section that displays , in a superimposed manner.

[0007]

[Operation] In the copying machine according to the present invention, a photographing device photographs a state in which a document is placed on a document table from below, and the photographed image is converted into an RGB video signal or the like and displayed on a display section. On the display section, the position on the document table corresponding to the paper selected based on the paper size detected in the paper feed section is also displayed, for example, in the form of a frame. Therefore, by looking at the display, you can easily check how the target part of the document will be copied onto the selected paper, and by moving the document while looking at the display, you can easily copy the target part onto the selected paper. You can copy them after matching them.

[0008]

Embodiment FIG. 3 is a schematic diagram of a laser copying machine according to an embodiment of the present invention. In this embodiment, the imaging device is a CCD.
The display section was arranged inside the document table cover and used a liquid crystal panel as described below.

[0009] On the upper surface of the laser copying machine main body 100, an original platen 2 is located, below which are located an optical device 30 such as a lamp, a mirror, and an imaging lens, and a CCD 31 which is an image sensor, and below which is a laser emitter 33. is installed. A document table cover 1 is provided on top of the document table 2, and a liquid crystal display section, which will be described later, is provided inside the document table cover. A photosensitive drum 6 is provided at the center of the main body 100, and around it a group of units 7 necessary for the copying process, such as a developing device, are arranged. In addition, at the bottom right side there is a paper feed section 4 in which paper feed cassettes of various sizes are installed.
is installed. A fixing unit 8 is provided on the left side of the photosensitive drum 6, and a paper discharge section 9 is provided on the left side thereof.

When a print switch (not shown) is pressed, the document table 2 moves and the document on the document table 2 is read by the CCD 31 via the optical device 30. The read signal is converted into a digital quantity and input to the control unit CPU.
The PU scans the photosensitive drum 6 with the laser emitter 33 in accordance with this data. Toner is attached to the electrostatic latent image formed on the photoreceptor drum in a developing device, and the toner image is transferred to paper. After the transfer, the paper is fixed by a fixing device 8 and is discharged to a paper discharge section 9.

In this laser copying machine, as described above, the document table cover 1 is provided with a liquid crystal display section, and when the document table cover is opened, the liquid crystal display section is visible to the operator. When the operator wants to view the copy side and position of the document, press the switch on the operation panel to view the CC
D scans and photographs the bottom surface of the document table.

FIG. 2 shows the appearance of the vicinity of the document table of the laser copying machine and an example of the display on the liquid crystal display section. The figure shows the document table cover 1 in an open state. Original table 2
Below the optical device 30 and CCD 31 as shown in FIG.
etc. are provided. A liquid crystal display section 11 made of a liquid crystal panel is disposed inside the document table cover 1. The LCD display section 11 indicates that the copying operation is in progress (with the original platen cover closed).
In this case, the image of the document table is not displayed, but the screen becomes completely white as described later, and the state of the document table and the size and position of the selected paper on the document table are displayed only when the document table cover is open. A newspaper NP (the manuscript of this embodiment) is placed on the manuscript table 2. The portion of the document NP placed on the document table 2 is abcd, and the shaded portion O is the target portion to be copied.

When the document NP is placed on the document table 2 as shown in the figure with the document table cover 1 open and the switch on the operation panel is pressed, the CCD 31 (not shown) photographs the state of the back side of the document table 2. do. The photographed video is converted into an RGB video signal and displayed on the liquid crystal display section 11. On the liquid crystal display section 11, a'b'c'd' corresponds to abcd of the original NP, and a copying target portion O corresponds to O'.

When paper is selected, the paper detection section of the paper feed section 4 detects the size and length/width, and the data is stored in the C.
Incorporated into PU. The CPU reads data from the ROM, which will be described later, and displays the position of the paper on the document table as a white frame 13 on the liquid crystal display section based on the detection result. This is displayed in the same manner as A4 portrait/horizontal, B5 portrait/horizontal, etc. depending on the selected paper. While looking at this liquid crystal display section 11,
By placing O' corresponding to the target portion O in exactly within the white frame 13, the target portion O is copied without being missing. Note that during the copying operation, the display on the liquid crystal display section 11 becomes entirely white as will be described later, and no copying is performed. In this laser copying machine, whether or not a copying operation is in progress is determined by opening and closing the document table cover 1.

FIG. 1 is a block diagram of a portion of the control section of the laser copying machine.

A ROM 22 and a RAM 23 are connected to the CPU 21, as well as a CCD 31 via an I/O 24, a liquid crystal control circuit 25 that controls the liquid crystal display section 11, a paper feed section sensor group 26, a document cover open/close detection section 27, and a display. The section switch 28 is connected. The display section switch 28 requests photographing and display of the lower surface of the document table. When this switch is pressed, the CCD photographs the document table from below, and the image is displayed on the display section.

The CPU 21 controls the entire laser copying machine. A control program such as a white frame pattern corresponding to the vertical/horizontal paper size is written in the ROM 22 in advance.

A working area is allocated to the RAM 23.

First, the opening/closing detection section 27 of the document table cover opening/closing
When the close signal is received by the CPU 21, if the close signal is closed, a white signal is output to the liquid crystal control circuit 25 to display the entire screen of the liquid crystal display section, thereby preventing copying during the copying operation. If open,
When the operator presses the display switch, the CPU
21 causes the CCD 31 to photograph the state of the lower surface of the document table. The image of the document table on the CCD 31 is taken into the CPU 21 via the I/O 24, outputted as an RGB video signal to the liquid crystal control circuit 25, and displayed on the liquid crystal display section 11. On the other hand, in the paper feed section, the paper size data (vertical/horizontal) is sent to the CPU 21 by the sensor of the selected paper cassette, and the CPU reads the data from the ROM 22 and outputs a white frame signal to the liquid crystal control circuit 25. The signal in this frame is the RG
It is superimposed with the B video signal and displayed as shown in FIG.

As described above, although a liquid crystal panel was used as the display unit in this embodiment, other display means that meet the conditions may be used, and the installation location may be any place that is easy to see and operate for the operator. It is also possible to display the

[0021] In this embodiment, the laser copying machine uses a CCD as the photographing device, and the photographing/photographing is performed only when the switch is pressed.
However, in normal copiers, etc., a camera installed below the document table takes pictures through a mirror, etc., so that the document is always taken when the document table cover is open and displayed in real time. There is no problem.

[0022]

As described above, according to the present invention, the condition of the copying machine's document table is photographed from below, the image is displayed on the display section, and the size and height of the paper selected in the paper feed section are displayed. /The horizontal direction is detected, and the copy position on the document table corresponding to the paper is displayed using a frame or the like in accordance with the display unit. Therefore, when copying a portion of a document of a size other than the standard size, the portion to be copied can be accurately copied onto the selected paper by looking at the display on the display unit. Furthermore, even with models that can perform masking and cropping, the images will not be missing, further improving the effects of masking and cropping.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a portion of a control section of a laser copying machine according to an embodiment of the present invention. FIG. 2 is a diagram showing the appearance of the vicinity of the document table of the same laser copying machine and an example of the display on the display section. FIG. 3 is a schematic configuration diagram of the laser copying machine.

[Explanation of symbols]

1　Original platen cover 11 Liquid crystal display section 2　Manuscript table 31 CCD (imaging device) 4 Paper feed section

Claims (1)

[Claims] 1. A photographing device for photographing a document table from below; a display unit for superimposing and displaying an image photographed by the photographing device and a position on the document table corresponding to a selected sheet; A copying machine characterized by: