JPH0467060A - Image forming device - Google Patents

Abstract

PURPOSE:To automatically set the magnification of copying by providing a magnification decision part which decides the magnification based on the size data of a transfer paper and the size data of an original which are inputted from both input parts of a transfer paper size input part and an original size input part. CONSTITUTION:The magnification decision part which decides the magnification based on the size data of the transfer paper and the size data of the original which are inputted from a control panel is provided and the copying of unmagnification, reduction or enlargement is executed. That means, when a display lamp for a magnification automatic set mode 52 is turned on by previously operating an variable power button 48 and a magnification automatic set mode is set, the magnification data of the copying is fetched from a memory 62 based on the combination of the selected size of the transfer paper and the selected size of the original, sent to a magnification display device 51 and displayed there. Since the magnification is automatically set and the copying is executed in such a way, operability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image forming apparatus in which a copying magnification is automatically set by specifying a transfer paper size and a document size.

[Prior Art] FIG. 4 shows a schematic configuration of a copying apparatus. 1 is a box;
An original platen glass 2 and an original platen cover 3 for covering the original platen glass 2 are attached to the upper surface of the original platen glass 2. On the lower surface of the original platen glass 2, a rod-shaped exposure light source 4 that scans for exposure in the direction of the arrow a, and light emitted from the light source 4 are attached to the lower surface of the original platen glass 2. Mirrors 6 to 9 and a lens 10 are provided to guide light emitted and reflected by the original placed on the glass of the original platen 2 to the photosensitive drum 5. Further, around the photoreceptor drum 5, there is a charging electrode 11 that charges the photosensitive surface of the photoreceptor drum 5 to a high voltage, a developer 12 that develops a latent image formed by exposure with toner, and a transfer paper that transfers the developed toner image. A transfer pole 13 for transferring toner, a separation pole 14 for separating the transfer paper from the photoreceptor drum 5, a cleaner 15 for removing toner remaining on the photosensitive surface of the photoreceptor tram 5 even after transfer, and the like are arranged. 16 is a conveyor belt that conveys the separated transfer paper, 17 is a fixing section that heat-fixes the toner image on the transfer paper, and 18 is a paper discharge plate. Furthermore, 19 to 21 are paper feed cassettes loaded with transfer papers of different sizes, and 22 to 24 are 1
Feeding rollers 25 to 27 feed a sheet of transfer paper, and guides 28 to 30 guide the transfer paper fed by feeding rollers 22 to 24.
31 is a second paper feed roller that takes timing between the leading edge of the transferred transfer paper and the leading edge of the toner image on the photoreceptor drum S; 32 is a roller that feeds the transfer paper to the photoreceptor drum 5; This is a guide to send.

With this copying machine, if you set the automatic magnification setting mode and select the size of the paper cassette in advance, you can set the original 33 on the original platen glass 2, close the original platen cover 3, and press the copy button on the operation panel. (not shown), the light source 4 moves in the direction of arrow a, and a separately provided optical size sensor (not shown) detects the size of the document 33. Thereby, the copying magnification is automatically set in relation to the size of the paper feed cassette selected above, and scanning is performed at a speed corresponding to the magnification when the light source 4 is exposed in the direction of arrow a. As a result, the image of the original document 33 is automatically enlarged to match the size of the selected paper feed cassette and is copied.

[Problem to be Solved by the Invention] However, when the lid 3 above the document platen glass 2 is removed and an automatic document feeder (ADF) is attached, the lid 3, which has a yellow color on the bottom surface to distinguish it from the original, appears. Since it does not exist, it is no longer possible to detect the document size and the automatic magnification setting mode cannot be used. Therefore, the operator must determine the magnification based on the size of the document to be used and the size of the selected paper feed cassette (transfer paper size), and input the magnification on the operation panel, which is inconvenient.

An object of the present invention is to provide an image forming apparatus in which the magnification is automatically set by inputting the document size and the transfer paper size, thereby eliminating the inconvenience of conventional magnification selection.

5. Means for Solving Problems] For this purpose, the image forming apparatus of the present invention has a transfer paper size input section provided on the operation panel, a document size input section provided on the operation panel, and a transfer paper size input section provided on the operation panel. The apparatus is equipped with a magnification determination section that determines a magnification from input transfer paper size data and original document size data, and is configured to perform copying at the same size, reduction or enlargement using the magnification determination section.

[Examples] Examples of the present invention will be described below. FIG. 1 is a diagram showing a part of the plane of the operation panel, FIG. 2 is a block diagram of a control section, and FIG. 3 is an explanatory diagram of a magnification data table.

In FIG. 1, 41 is a copy button, 42 is a copy number display, 43 is a numeric keypad, 44 is an original size selection button (original size input section), 45 is an original size display, and 46 is a transfer paper size (paper feed cassette). size) selection button (transfer paper size input section), 47 is a transfer paper size display, 48 is a magnification button,
49 is a magnification up button, 50 is a magnification down button, 51 is a magnification display, 52 is a magnification automatic setting mode display lamp, and 53 is a magnification arbitrary setting mode display lamp.

In FIG. 2, 61 is a control unit (including a magnification determination unit) having a CPU, which includes the above-mentioned transfer paper size selection button 46, original size selection button 44, operation contents of other buttons, and the internal operation of the device. sensor detection signals, etc. are input, and
The results of internal processing are output to a document size display 45, a transfer paper size display 47, a magnification display 51, and the like. Reference numeral 62 denotes a memory, in which magnification data as shown in FIG. 3 is stored. This magnification data is determined from the document size and transfer paper size.

From the above, press the transfer paper size selection button 4 on the operation panel.
6 is repeatedly operated, the operation signal is taken into the control unit 61, and the transfer paper size (paper feed cassette size) corresponding to the operation is sequentially updated and displayed on the transfer paper size display 47. Further, when the original size selection button 44 is repeatedly operated, the operation signal is also taken into the control unit 61, and the original size corresponding to the operation is displayed on the original size display 4.
5 are updated and displayed sequentially. Then, press magnification button 4 in advance.
8 to turn on the magnification automatic setting mode display lamp 52 and set the magnification automatic setting mode, the memory 6
The copy magnification data is taken out from 2 and displayed on the magnification display 51.
and displayed there. In addition, this magnification data is sent to a magnification control unit (not shown), and the scanning speed of the light source 4 and various timings of the process are set according to the magnification, and copying at the same size, reduction, or enlargement is performed. .

Note that if the variable magnification button 48 is not operated, neither the automatic magnification setting mode nor the arbitrary magnification setting mode is set, so that copying is performed at the same magnification. Further, when the arbitrary magnification setting mode display lamp 53 is turned on by the variable magnification button 48 to select the arbitrary magnification setting mode, an arbitrary magnification can be set by operating the magnification up button 49 and the magnification down button 50.

[Effects of the Invention] As described above, according to the present invention, the magnification is automatically set and copied by inputting the size of the original and the size of the transfer paper, so there is an advantage that the operability is extremely improved.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a part of the operation panel according to an embodiment of the present invention, FIG. 2 is a block diagram of the control section, FIG. 3 is an explanatory diagram of magnification determination, and FIG. 4 is a schematic configuration diagram of the copying machine. It is. DESCRIPTION OF SYMBOLS 1...Box body, 2...Document stand crow, 3...Document stand cover, 4...Exposure light source, 5...Photoconductor drum, 6~
9...Mirror, 10...Lens, 11...Charging electrode, 12...Developer, 13...Transfer pole, 14...Separation pole, 15...Cleaner, 16... Conveyor belt, 1
7... Fixing section, 18... Paper discharge tray, 19-21...
Paper feed cassette, 22-24...Feed roller, 25-2
7...First paper feed roller, 28-30...Guide, 3
1...Second paper feed roller, 32...Guide, 33...
・Original, 41... Copy button, 42... Copy number indicator, 43
...Numeric keypad, 44...Original size selection button, 45.
... Original size indicator, 46... Transfer paper size selection button, 47... Transfer paper size indicator, 48... Magnification change button,
49...Magnification up button, 50...Magnification down button, 5
1... Magnification display, 52... Magnification automatic setting mode display lamp, 53... Magnification arbitrary setting mode display lamp,
61...Control unit, 62...Memory. Agent Patent Attorney Tsuneaki Nagao

Claims (1)

[Claims] (1) A transfer paper size input section provided on the operation panel;
It is equipped with an original size input section provided on the operation panel, and a magnification determination section that determines the magnification from the transfer paper size data and the original size data input from both input sections, and the magnification determination section determines the same size or reduced size. or an image forming apparatus characterized by performing enlarged copying.