JP2732950B2 - Copier - Google Patents

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 an original having a size other than the standard size is to be copied by a copying machine, particularly when a part of an original (for example, a newspaper) larger than the standard size is to be exactly copied onto a standard size paper, Flip over, and without knowing exactly where the target part is located, place the approximate size mark (mark A4, B5, etc., along the edge of the platen) on the platen of the copier. The manuscript was placed with the aim. Then, when actually copying, if the image of the target portion is missing, the original is shifted, and the image of the target portion of the original is obtained by shifting the document again with reference to the copy.

[0003]

In such a copying method, the original is facing downward and the target portion is not visible, so that the original may be copied well. There are many drawbacks, such as a part of the part being chipped, the whole being copied obliquely, and the target part being offset to the corner of the sheet, and there is a drawback that copying is repeated many times.

Further, in the case of a model capable of performing masking and trimming, there is a problem that a slight shift occurs even though the operations such as masking and trimming are performed and an image is lost.

[0005] An object of this invention, images to be copied
By displaying to the operator the easy-to-see position, double
It makes it easy to adjust the tilt and position of the
It is an object of the present invention to provide a copying machine capable of easily obtaining a photographed image .

[0006]

Means for Solving the Problems The present invention comprises a platen, before
Display unit provided on the back of the platen cover that covers the platen
A copying machine for copying an image of a document placed on the platen , wherein the image of the document placed on the platen is
A photographing device for photographing an image;
And a control unit for displaying the image on the display unit .

[0007]

[Action] In the copying machine according to the invention is placed on the document table
The image of the original is taken by the image capture device and
Since it is displayed on the display unit provided on the back of the bar,
The state of the image of the document copied at a position that is easy for the operator to see
Is displayed, and the operator looks at the original
Copy by moving the original placed on the platen
The tilt and copy position of the image can be easily adjusted.
A desired copy image can be easily obtained. Display unit
The copier is large because the
There is no problem of conversion. Here, the shooting device
When the image of the photographed document is displayed together with the frame type indicating the position on the platen corresponding to the sheet selected based on the sheet size detected in the sheet feeding unit, the operator looks at the display unit. This makes it even easier to see how the intended part of the document will be copied to the selected paper.
Confirmation can, Ru can be copied from to fit snugly selected paper the desired portions by moving the document while viewing the display unit.

[0008]

FIG. 3 is a schematic structural view of a laser copying machine according to an embodiment of the present invention. In this embodiment, the photographing device is a CCD.
The display section is located inside the platen cover (
Surface) and a liquid crystal panel was used.

An original platen 2 is located on the upper surface of the laser copier main body 100, an optical device 30 such as a lamp, a mirror and an image forming lens, and a CCD 31 serving as an image sensor are located below the original table 2, and a laser light emitting device 33 is located below the CCD 31. Are arranged.
A document table cover 1 is provided on the document table 2, and a liquid crystal display unit described later is disposed inside the document table cover. A photosensitive drum 6 is provided at the center of the main body 100, and a unit group 7 such as a developing device necessary for a copying process is provided around the photosensitive drum 6. In the lower right part, a paper feed unit 4 in which paper cassettes of various sizes are mounted.
Are arranged. A fixing unit 8 is provided on the left side of the photosensitive drum 6, and a paper discharge unit 9 is provided on the left side thereof.

When a print switch (not shown) is pressed, the original table 2 is moved and the original on the original 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 light emitter 33 according to this data. Toner is attached to the electrostatic latent image formed on the photosensitive drum in a developing device, and the toner image is transferred to a sheet. After the transfer, the sheet is fixed by the fixing device 8 and is discharged to the sheet discharge unit 9.

In this laser copying machine, the liquid crystal display section is provided on the document table cover 1 as described above, and when the document table cover is opened, the liquid crystal display section is visible to the operator. When the operator wants to see the copy surface or position of the original, the operator can press the switch on the operation panel to
D scans and scans the lower surface of the document table.

FIG. 2 shows an appearance of the laser copying machine in the vicinity of a document table and a display example of a liquid crystal display unit. The figure shows a state where the platen cover 1 is opened. Platen 2
The optical device 30 and the CCD 31 as shown in FIG.
And so on. A liquid crystal display unit 11 composed of a liquid crystal panel is provided inside the document table cover 1. The liquid crystal display unit 11 is performing a copying operation (the platen cover is closed)
In this case, the image on the platen is not displayed, the entire surface becomes white as described later, and the state of the platen and the size and position of the selected sheet on the platen are displayed only when the platen cover is open. On the platen 2, a newspaper NP (document of this embodiment) is placed. The portion of the document NP placed on the document table 2 is abcd, and a hatched portion O is a target portion to be copied.

When the original NP is placed on the original platen 2 as shown in the figure with the original platen cover 1 opened, and a switch on the operation panel is pressed, a CCD 31 (not shown) photographs the state of the back surface of the original platen 2. I do. The captured video is converted to an RGB video signal and projected on the liquid crystal display unit 11. In the liquid crystal display section 11, a'b'c'd 'corresponds to abcd of the original NP, and the copy target portion O corresponds to O'.

When a sheet is selected, the size and the height / width are detected by the sheet detection unit of the sheet feeding unit 4 and the data is stored in C.
Incorporated in PU. The CPU reads the data of the ROM described later and displays the position of the sheet on the platen as a white frame 13 on the liquid crystal display unit based on the detection result. This is displayed in the same manner as A4 portrait / landscape, B5 portrait / landscape, etc., depending on the selected paper. While looking at the liquid crystal display section 11, the original NP
By placing O ′ corresponding to the target portion O exactly in the white frame 13, the target portion O is copied without any loss. During the copying operation, the display on the liquid crystal display unit 11 is entirely white as described later, and is not copied. In this laser copying machine, whether or not a copying operation is being performed is determined by opening and closing the document table cover 1.

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

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

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

A working area is allocated to the RAM 23.

First, the opening / closing of the platen cover open / close detector 27 is described.
When the CPU 21 receives the close signal, it outputs a white signal to the entire liquid crystal display section to the liquid crystal control circuit 25 in the case of the close to prevent the image from being copied during the copy operation. In the case of open, when the display section switch is pressed by the operator, C
The PU 21 causes the CCD 31 to photograph the state of the lower surface of the document table. The image of the state of the original platen of the CCD 31 is taken into the CPU 21 via the I / O 24, output to the liquid crystal control circuit 25 as an RGB video signal, and projected on the liquid crystal display unit 11. On the other hand, in the paper feeding unit, the data of the paper size vertical / horizontal is sent to the CPU 21 by the sensor of the cassette of the selected paper, and the CPU reads the data of the ROM 22 and outputs the signal of the white frame to the liquid crystal control circuit 25. The signal in this frame is superimposed with the RGB video signal and displayed as shown in FIG.

[0020] Thus, although this embodiment uses the liquid crystal panel as the display unit may be a satisfying other display means, and since the installation position and the platen of the inner operating
The display unit is easy to read, and the display unit
There is no typing. In addition, it is also possible to reduce and display.

In this embodiment, the photographing device of the laser copying machine is a CCD, and the photographing operation is performed only when a switch is pressed.
However, in ordinary copiers and the like, use a camera installed below the platen to take a picture through a mirror or the like, and always take a picture when the cover is open and display it in real time. No problem.

[0022]

As described above, according to the present invention, the platen
The image of the original placed on the
On the display section on the back of the platen cover.
Of the original to be copied in a position
The status of the image is displayed, and the operator
By moving the original placed on the platen while watching
To easily adjust the tilt and copy position of the copied image.
Thus, a desired copied image can be easily obtained.
Also, by providing the display unit on the back of the platen cover,
There is no problem that the copying machine becomes large. Here, shooting
Along with the image of the original photographed by the shadowing device , if the frame type indicating the position on the platen corresponding to the paper selected based on the paper size detected in the paper feeding unit is displayed together, the non-standard size For example, when copying a part of a document of a large size, the user can copy the intended portion to be accurately selected on a sheet by looking at the display on the display unit. further,
Even with a model that can perform masking and trimming, the image is not lost, and the effects of masking and trimming are further improved.

[Brief description of the drawings]

FIG. 1 is a block diagram of a part of a control unit of a laser copying machine according to an embodiment of the present invention. FIG. 2 is a diagram showing an appearance near a document table of the laser copying machine and a display example of a display unit. FIG. 3 is a schematic configuration diagram of the laser copying machine.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 platen cover 11 liquid crystal display 2 platen 31 CCD (photographing device) 4 paper feeder

Claims (1)

(57) [Claims] A platen for covering the platen; and a platen cover for covering the platen.
And a display unit provided on the back surface of the chromatography, in the copying machine for copying an image of the document placed on the platen, imaging apparatus for capturing an image of the document placed on the document table
And an image captured by the image capturing device is displayed on the display unit.
A copying machine comprising: a control unit for displaying .