JPS63309975A - Image forming device - Google Patents

Abstract

PURPOSE:To form an image without omitting the image of a second original by deciding the image forming magnification according to the size of the second original and the size of an image formed sheet which is formed for the first time in the case of forming images on both sides or in the case of multiple image formation. CONSTITUTION:In the case of forming images on both sides or in the case of multiple image formation, the image forming magnification is inputted from an input part and the size of the original is detected by an original size detecting means. Based on the signals of the detecting means and the input part, a sheet size selection means 62a selects the sheet. And the images of the original can be formed on the sheet in a specified magnification. When the image formation for the second time is executed to the said sheet, the image forming magnification for the second time is decided according to the size of the second original and the size of the sheet in a magnification decision means 62b and the image of the second original can be formed on the sheet in this image formation. Thus, the image can be prevented from formed in a state where the image of the second original is omitted.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an image forming apparatus such as a copying machine, and more particularly to an image forming apparatus that determines an image forming magnification based on document size information and sheet size information. .

(B) Prior Art Conventionally, in an image forming apparatus equipped with an automatic document feeder, when performing double-sided or multiple image formation, the sheet size and image formation magnification are selected based on the document on which the image is formed for the first time. The second image formation magnification was performed at the same magnification as the first image formation magnification.

←→ Problems to be Solved by the Invention By the way, in the above-mentioned image forming apparatus, since the second image forming magnification is the same as the first image forming magnification, the second N draft is There was a drawback that the image was formed in a state where the formation was missing.

B.) Means for Solving the Problems The present invention aims to solve the above-mentioned problems, and when forming double-sided or multiple images, it is possible to solve the problems by using the document size detection means and the automatic sheet size selection means. The present invention is advantageous in that a magnification determining means is provided which determines the image formation magnification of the second document in accordance with the document size and sheet size based on the signal.

Kano 1 Function Based on the above configuration, when forming double-sided or multiple images,
The image forming magnification is inputted through the input section, the size of the document is detected by the document size detection means, and the sheet size selection means selects a sheet based on the signals from the detection means and the input section. Then, an image of the original is formed on the sheet at a predetermined magnification. Then, when performing a second image formation on the sheet, the magnification determining means determines the second image formation magnification according to the size of the second document and the size of the sheet, and performs the second image formation on the sheet. Then, an image of the second document is formed on the sheet.

(f) Example Embodiments of the present invention will be described below along with the drawings.

As shown in FIG. 2, the copying machine 1 has a main body 3 containing a copying section 2, and the main body 3 has a platen 5, a platen 5,
It is equipped with two cassettes 12 and 13 that house a light source 6, a mirror 7.8, 9, and 10° lenses 1), and a sheet S.
At the top of the cassettes 12 and 13 are paper feed rollers 15.
・16 are arranged. A deck 17 is attached to the outside of the main body 3, and the deck 17 is provided with a paper feed roller 19. Furthermore, a registration roller pair 21 is arranged downstream of the paper feed roller 19 and the paper feed rollers 15 and 16. It is set up. Furthermore, the roller 2
1, the image forming section 2 is disposed, and downstream of the image forming section 2, a conveyor belt 22 and a fixing device 2 are disposed.
3 are arranged. A flapper 25 and a pair of paper ejecting rollers 26 are arranged downstream of the fixing Wj23, and a folding means Ae* is disposed downstream of the pair of paper ejecting rollers 26 adjacent to the copying machine main body 3. A device 27 and a finiccia 28 are provided. Further, a re-conveyance path 29 is provided branching off from the flapper 25, and the re-conveyance path 29 is provided with an intermediate tray device 301e.

On the other hand, the copying machine main body 3 has an automatic document feeder installed on the top! The feeding device 31 has a document tray 32 on which documents M are stacked. Then, the tray 3
A paper feed roller 33 for feeding the document M on the tray 32 is disposed near the tray 32. A separation belt 35 rotating counterclockwise and a separation belt 35 rotating counterclockwise downstream of the roller 33 are disposed near the tray 32. A moving conveyor bell I.36 is provided. Further, a sensor 37 for detecting the size of the document M is provided near the belt 36;
A drive roller 40 is disposed in a straight line in the transverse direction with respect to the document conveyance direction.
A conveyor belt 42 is stretched between the driven roller 41 and the driven roller 41 . Further, a flapper 45 is disposed on the document discharge section 43 on the left side of the belt 42, and around the flapper 45 there is a conveyance i%4 that is switched and guided by the flapper 45.
6.47.49 is provided. Then, the conveyance path 4
A pair of conveyance rollers 50 is disposed at the conveyance g847, a pair of conveyance rollers 51 is disposed at the conveyance g847, and a discharge roller 52 is disposed at the conveyance path 49.

Furthermore, as shown in FIG. 1, the copying machine 1 is equipped with a control section 61, and the control section 61 is equipped with automatic sheet size selection means 62a and magnification determination means 62b.
(CPU) 62, a ROM 63 storing a control program to control the CPU 62, and a RAM 65 serving as a main storage device.On the copying machine main body 3 side, an output interface 66 that outputs a IIJII signal to a load such as a main motor, and each sensor. An input interface 67 for inputting detection signals from the input interface 67, and various input keys 69
(See Figure 3)
0 (see Figure 3) is connected to an input/output interface 71 that issues a display signal. Furthermore, the loads and sensors of the folding device 27, finisher 28, and automatic document feeder 31 attached to the copying machine 1 are also connected via respective interfaces (not shown).

Next, the operation of this embodiment will be explained along the line 74-chart in FIG.

The operator operates the document tray 32 of the automatic document feeder 31.
Documents M of various sizes (for example, A3, A4, etc.) are loaded on the board, and each mode (for example, round, number of sheets, density, magnification, etc.) is set on the input key 69. When the start key is pressed, a motor (not shown) is rotated to drive the paper feed roller 33, and the separation belt 35 and conveyance belt 36 to be driven counterclockwise. The documents M stacked on the document tray 32 are fed by a paper feed roller 33, and separated and conveyed one by one from the bottom by a separation belt 35 and a conveyance belt 36.

At this time, the original fil1M is detected by the sensors 37 and 39, the CPU 62 determines the size of the original M based on the signals from the sensors 37 and 39, and the automatic sheet size selection means 62a selects the size of the layer fiM and the copy magnification. Select sheet size based on. Further, the CPU 62 determines whether or not the mode set by the input key 69 is a double-sided copy mode (S1), and if it is not a double-sided copy mode, it determines whether it is a multiple copy mode (S2). and,
In the case of double-sided copying or multiple copying mode, the document M is conveyed between the platen 5 and the conveyor belt 36, and is fed and stacked at the document reference position on the platen s by the conveyor belt 36. Then, manuscript M has lamp 6 and mirror? , 8
, 9, 10, and the lens 1), the image is read and formed on the copying section 2. Furthermore, a sheet S is fed from the cassette 12, 13 or the deck 17 by the paper feeding rollers 15, 16 or the feeding device 19, and the sheet S is transported by the registration roller 21 in synchronization with the image formed on the copying unit 2. be done. Then, the image is copied on the sheet S by the copying section 2, and the sheet S is further transported to the fixing device 23 by the transport section 22. Then, the image is fixed on the sheet S by the fixing device 23, and the sheet S is transferred to the re-transport path 2 by the flapper 25.
9, is guided and stored in the intermediate tray assembly W30 (S3). Further, the set number of copies of sheets S, etc. are stored in the intermediate tray device 30 by the same operation. Then, C
The PL 162 discharges the first document M on the platen 5 to the top of the documents M stacked on the document tray 32 by the document discharge section 43, and then outputs the second document M by the same operation as described above. The second original M is placed, and the size of the original M is determined based on the signals from the sensors 37 and 39 (S4
). Furthermore, the magnification determining means 62b
The copy magnification is determined according to the sheet S stored in the intermediate tray device 30 (S5). Then, C.P.
The U62 displays the determined magnification on the display 70 (S6), and displays the second document M by the same operation as described above.
A second copy is made to the sheets S stored in the intermediate tray device 30 (S7). Then, the second copying unit sheet S... is folded in half by the folding device 27 and Z
The paper is folded and transported to the finisher 28 for storage. Further, when there are originals on the original tray 32, two subsequent originals M, . . . are copied by the same operation as described above. Then, when all of the originals M on the original tray 32 are copied, the copying operation ends (S8).

(G) As described in detail, according to the present invention, a magnification determining means for determining an image formation magnification based on signals from the original size detecting means and the automatic sheet size selecting means is provided.
When forming double-sided or multiple images, the image formation magnification is determined according to the size of the second original and the size of the first image-formed sheet, so that the image of the second original is not missing. can be formed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing magnification determining means according to the present invention. FIG. 2 is a front sectional view showing an image forming apparatus embodying the present invention. Moreover, FIG. 3 is a plan view showing the input section. Furthermore, FIG. 4 is a flowchart showing the operation of the present invention. 37.39...Document size detection means, 62a...
・Automatic sheet size selection means, 62b...Magnification determination means, M・Original, S...Sheet.

Claims (1)

[Claims] (1) Document size detection means for detecting the size of the document;
an automatic sheet size selection means for automatically selecting a sheet size, and an image forming apparatus that refeeds a sheet on which images have been formed to form double-sided or multiple images, when forming double-sided images or multiple images; A magnification determining means is provided for determining an image formation magnification of the second original according to the original size and sheet size based on signals from the original size detecting means and the automatic sheet size selecting means. Features of the image forming device.