JPH0246064A - Image forming device - Google Patents

Abstract

PURPOSE:To change the address reading order of a main-scanning direction or a sub-scanning direction, to simplify the setting of recording paper and to prevent from taking space at a feeding table part by selecting the recording medium of size coincident with the copying magnification of original size and combining the setting direction of the recording medium and the setting direction of an original. CONSTITUTION:A white board for detecting size is read, white level correction with a filter is executed, and the maximum length of the original of a scanning direction (Y direction) and a direction (X direction) which is right angle to the scanning direction is detected. Till picture information is inputted to the one at least of storing means 52 and 53 once, a recording medium corresponding copying magnification is carried, and the picture information of the main- scanning addresses '0 address' to '(r) address' of a sub-scanning address '(n) address' is read as R.VD. When the only setting direction of the recording medium is different at the time when the detecting of the size of the original is finished, the picture information of the sub-scanning addresses '0 address' to '(n) address' of the main-scanning address '(r) address' is read as the R.VD.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention is applied to image forming apparatuses such as digital copying machines.

[Conventional technology]

Conventional copying machines are equipped with a paper feed tray into which dedicated recording paper storage cassettes prepared for each recording paper size can be attached in order to easily copy onto recording paper of the required size.

[Problem to be solved by the invention]

By the way, in some of the above-mentioned conventional devices, the recording paper size is the same, but the feeding direction (vertical feeding or horizontal feeding) is changed and it is set on the paper feed tray so that it can cope with copying magnification etc. This makes the process complicated, and it is necessary to increase the space in the paper feed table.

Therefore, the present invention solves the problems of the above-mentioned prior art,
To provide an image forming apparatus in which recording paper can be easily set and space is not taken up on a paper feed table.

[Means to solve the problem]

In order to achieve the above object, the present invention provides an image reading means that converts a document image into image information by scanning either the document image or an optical reading device, and an image reading device that converts the read image signal into a main scanning direction perpendicular to each other. An image storage means for sequentially writing and storing an address in the sub-scanning direction, an original size detection means for detecting the size of the original in the main-scanning direction and the sub-scanning direction, and an image storage means for reading out the stored image signals as appropriate and directing the light to the photoreceptor. an image recording means for projecting a visible image onto a photoreceptor and transferring it to a recording medium, and selectively conveying recording media of various standard sizes placed at a plurality of locations to the image recording means. a recording medium conveyance means for detecting the size of the recording medium, a recording medium size detection means for detecting the size of the recording medium in the width direction perpendicular to the conveyance direction, and a copy magnification setting means, and selects a recording medium of a size corresponding to the copy magnification. In an image forming apparatus that conveys the image to the image recording means and obtains a predetermined image, a recording medium of a size that matches the copy magnification of the original size is selected, and by a combination of the recording medium setting direction and the original setting direction, The present invention is characterized in that an image is formed on a selected recording medium by changing the address reading order in the main scanning direction or the sub-scanning direction of the image storage means.

[Effect]

Since the above means is adopted, if a recording medium of a size that matches the copy magnification of the original size is set, the main and sub-scanning directions of the image signal stored in the image storage means can be changed as appropriate with respect to the recording medium. By forming an image, the appropriate copy is automatically made according to the set state of the recording medium, and there is no need to consider the vertical or horizontal set state of the recording medium depending on the copy magnification.
There is no need to set aside space for horizontal setting, so space can be saved.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

Figure 1 is a front view showing an outline of the overall configuration of this embodiment;
The figure is an enlarged front view of the image reading means, Fig. 3 is an enlarged front view of the image recording means, Fig. 4 is a plan view of the image recording means, Fig. 5 is a block diagram of the entire control system, and Fig. 6 is the image reading means. FIG. 7 is a block diagram of the control system of the image storage means; FIG. 8 is a block diagram of the control of the image recording means; FIG. 9 is an explanatory diagram of the image matrix; FIGS. 12 is a timing chart of each signal, and FIG. 13 is a front view showing another embodiment using roll paper.

In Figures 1 to 4, 1 is a contact glass, 2
is an original, 3 is a filter, 4 is a lens, 5 is a first scanner, 6 is a fluorescent lamp, 7 is a first mirror 8 is a second scanner, 9 is a second mirror, IO is a third mirror, 11 is a CCD element, 1
2 is a white plate which is a document size detection means; 13 is a pressure plate; 14
15.16 is a paper feed port, 17 is a registration detection sensor, 18 is a semiconductor laser, 19 is a cylinder lens,
20 is a polygon mirror, 21 is an fθ lens, 22 is a mirror, 23 is a synchronous reflection plate, 24 is a synchronous detection plate, and 25 is a photoreceptor.
6, developing section 27, transfer/separation section 28, cleaning section 2
A process unit 30 such as 9 is arranged for image visualization. Furthermore, a conveyance means 32 consisting of rollers, guides, etc. for conveying a recording medium 31 such as transfer paper, a recording medium size detection means 33, a fixing unit I section 34, a paper discharge tray 35, etc. are installed.

Next, the operation of the image reading means 51 will be explained.

The original 2 is set on the contact glass l, and the copy magnification, number of copies, and automatic paper feed selection means (not shown) automatically detect the original size and set the size of the recording medium 31 that matches the copy magnification. 15 or 16, and then set the mode (in which the recording medium 31 is transported and copied) and press the start key. Then, before reading the original image, the filter 3 shown in FIG.
(not shown) stands up just in front of the lens 4.

Next, a second scanner (a unit of a fluorescent lamp 6 and a first mirror 7) 5 and a second scanner (a unit of a second mirror 9 and a third mirror 10) are installed.
unit) 8 performs a full scan and irradiates the CCD element 11 with light. First, the white plate 12 for size detection is read, white level detection IF is performed using the filter 3, and if the filter 3 is blue at the boundary between the original 2 and the pressure plate (yellow) 13, the yellow color of the pressure plate 13 is cut off. Shading correction is performed using the fact that a density difference can be obtained, and the maximum length of the document in the scanning direction (Y direction) and the direction perpendicular to the scanning direction (X direction) is detected. After this, the filter 3 falls again and scans again. At this time, after reading the reference white plate 14 and correcting the white level, the scanning speed is changed by iJ depending on the amount of magnification (for example, 2
At 00%, the scanning speed is 1/2 of the original magnification).

In the X direction, the virtual sample point density is calculated by electrical magnification using a known cubic function convolution method, etc., and processed as image information. Up to this point, the size of the document 2 and the document image have been read.

In the image recording means 54 shown in FIGS. 3 and 4, the image information corresponding to the copying magnification is stored in at least one of the storage means 52 and 53 (described later).
The leading edge of the recording medium conveyed from the paper feed port 15, 16 shown in FIG. 1 is detected by the registration detection sensor 17,
Thereafter, at a predetermined timing, the semiconductor laser 18 shown in FIG.
(at this time, image information has been written to one of the storage means 52 and 53). This laser light is focused by a cylinder lens 19 and is incident on a polygon mirror 20 that rotates and scans. The light then passes through an fθ lens 21, a mirror 22, and a synchronization mirror 23 for detecting the scanning position of the laser beam, and then enters the synchronization detection plate 24. Here, the laser light that has passed through the fθ lens 21 is irradiated onto the photoreceptor 25, and the charges on the photoreceptor 25 are blown away to create an electrostatic latent image.

The size of the recording medium 31 set in the paper feed port 15.
This can be determined by attaching a shielding plate (not shown) with a notch shape that differs depending on the size to the tip of b, and reading a detection pattern using the recording medium size detection means 33.

Next, as shown in FIG. 5, the entire control system includes an image reading means 51 and an image storage means 5 for storing the read image information.
2.53, an image recording means 54 that reads image information from the storage means 52 and 53 and outputs it to recording paper, and an input means 55 that inputs conditions for image recording (copy magnification setting means, automatic paper feeding selection mode) etc.), and a system control means 56 that sends necessary information to the reading means 51, storage means 52, 53, and image recording means 54 based on information from the input means 55, and monitors and controls the status of each of them.

FIG. 6 is a block diagram of the reading means 51, which includes a fluorescent lamp 6 for exposing the document 2, a reading control circuit 57 for driving and controlling the first and second scanners 5.8, and a clock CKO for driving the CCD element II. and a CCD drive circuit 58 that generates CCD initialization pulses S, H, and inputs the image information VDin of the CCD element 11 and performs binarization processing, halftone processing, based on information 59 from the system control means 56, It consists of an image information processing circuit 60 that performs magnification processing and the like.

FIG. 7 is an internal block diagram of the image storage means 52.53, and the storage means 52.53 have the same configuration. A main scanning address management circuit 61 that counts clocks CLK for each pixel of image information to manage addresses in the main scanning direction, and a sub-scanning address management circuit 61 that counts the synchronization signal I2.5sync of the image reading means 51 or the image recording means 54. Signals W and F of the bitmap storage circuit 63, the image reading means 51, and the image recording means 54 whose addresses are managed by a sub-scanning address management chart B62 that manages addresses in the scanning direction.

Gate (write signal to storage means), and.

A memory control circuit 64 that controls writing and reading of image information to and from the storage circuit 63 based on Req (a readout signal from the storage means) and information from the system control means 56, and simultaneously switches the synchronization signal; A signal switching circuit 69 and an image information read request signal from the image recording means 54.

After receiving the Req and before starting readout, the D-F/ F65 and the outputs Q and Q of this DF/F65 are input, and based on the information from the input means 55, based on the information sent from the system control means 56, and the signal output from the memory control circuit 64, This output is connected to a selection circuit 66 that selects and outputs one of the human input signals, and is connected to an AND gate 67 with line synchronization signals R, L, and Gate in the main scanning direction when reading image information.
It is composed of a latch circuit 68 that calculates the product at , latches the image signal in the storage circuit 63 using the image information transfer lock CLK, and outputs the latched image signal. Both input signals of the AND gate 67 are H.
Image information 9 [JR, VD is output only when the level is iRh. The main scanning address management circuit 61 and the sub-scanning address management circuit 62 input pulses to count up (or down) after an arbitrary preset value and count up or down are specified by the system control means 56. , a ring counter that returns to the original preset value after reaching a predetermined value.

In the case of the storage means 53, the reference numeral raJ is attached to the numbers (61 to 69) of the members common to the storage means 52 in order to make the explanation easier to understand. Next, FIG. 8 is an internal block diagram of the image recording means 54. In the figure, an image recording control circuit 71 that transports the recording medium from each paper feed port 15, 16, controls the visualization of the image, and exchanges information with the system control means 56; The rotation control of the polygon mirror 20 and the synchronization signals R, L, and 5sync synchronized with the detection signal of the scanning light synchronization detection plate 24 are manually generated, and based on this, the semiconductor laser 18 is modulated and the polygon mirror 20 is irradiated with the synchronization signals R, L, and 5sync to be exposed to light. It consists of a video control circuit 72 that scans over the body 25 to form a latent image.

Next, the memory circuits 63 and 63 of the memory means 52 and 53
It is assumed that the bitmap configuration of a satisfies the maximum recording width of the image recording means 54 in the main scanning direction, and satisfies the length of the regular size paper in the longitudinal direction with respect to the maximum recording width in the sub-scanning direction. Recording means 5
4, the maximum recording width (X direction) is 297 mm, the storage circuits 63 and 633 can store image information (420 mm) during vertical feeding of standard size A3, and each of the storage means 52 and 53 By connecting the memory circuit of , it is possible to read A3 documents in portrait mode.

You can write and read without waste using l.

Here, the operation of the above embodiment will be specifically explained.

When the ADF (not shown in FIG. 2) completes feeding the original 2 onto the contact glass 1, the reading control circuit 57 shown in FIG. 6 outputs a reading start signal Write. As a result, the image information processing circuit 60 synchronizes with the COD initialization signals S, H, of the CCD drive circuit 58, and
The image information in the main scanning direction of the CD is input sequentially, and the synchronization signal W is input.
, L, 5sync, gate signal for image information in the main scanning direction W, L, Gate, reading start signal W, F, Gat
e, and image information %W, VD processed based on the input signals of the human power means 55 (FIG. 5) are sequentially output. It is assumed here that the fluorescent lamp 6 is already on, and that the C
It is assumed that the reflected light from the document 2 of the fluorescent lamp 6 forms an image on the OD element 11 via the lens 4.

Since the first and second scanners 5 and 8 continuously move in the X direction, the image information processing circuit 60 sequentially processes image information in the main scanning direction (X direction) of the document 2 at the timing cycle of the CCD drive circuit 58. Input, process, and output.

The reading control circuit 57 also operates after measuring a certain period of time based on a signal from a sensor (not shown) that reads the timing until the original 2 from the ADF is set on the contact glass 1, or after a start key (not shown) is pressed. The initialization signal (synchronization signal) of the CCD drive circuit 58 starts counting from the moment the button is pressed.

Of the storage means 52 and 53, it is assumed here that writing and reading are performed in the order of 52 to 53. The memory control circuit 64 of the storage means 52 inputs the read start signals W, F, and Gate from the reading means 51, and first, the main scanning address management circuit 61 and the sub-scanning address management circuit 6 at the edge thereof.
2 is initialized, in this case it is set to "O", and the W/R signal is output to switch the synchronization signal switching circuit 69 to the synchronization signal W, L, 5sync input from the reading means 51, and the storage circuit 63 is set to "O". Enter information writing state. Next, when the gate signals W, L, and Gate rise, the main scanning address management circuit 61 starts counting up the address value.

As a result, the memory circuit 63 is stored at the sub-scanning address "0 address".
The gate signals W, L are sent from the main scanning address “θ address” of
,, Image information JIW and VD are written to the address "r" which is counted up by the main scanning address management circuit 61 until Gate starts up. Subsequently, synchronization signals W, L
, 5ync, the sub-scanning address management circuit 62
counts up the address value, and at the same time initializes the main scanning address management circuit 61, that is, sets it to "0". Further, the gate signals W, L, and Gate rise, and writing is performed in the same manner. Then, when the address value of the sub-scanning address management circuit 62 becomes "n",
Initialize the main scanning address management circuit 61 in the same manner as above,
That is, it is set to "0", informs the memory means 53 that the writing of the memory←#λ@52 has ended at n, and outputs a signal NEXT informing that the next memory means 53 is to be written. As a result, the storage means 53 initializes the sub-scanning address management circuit 62a, that is, sets the address to "0", and uses the bit? I can do it. The storage means 52 stores gate signals W, L following the same 1υ1 signals W, L, 5sync.

When Gate starts up, the image information W and VD are written from the main scanning address "O" to "r" of the final sub-scanning address "n" of the memory circuit 63 in the same way as described above, and the write operation ends (image The information processing circuit 60 stops inputting image information to the CCD and stops outputting reading start signals W, F, Gate to the storage means 52). Thereafter, the original 2 is ejected from the contact glass 1, the next original 2a hits a sensor (not shown), and the next original 2a is written in the memory circuit 63a in the same manner. Before that, the recording medium 31 that matches the magnification of the original 2 reaches the registration detection sensor 17, and after a predetermined count (recording medium 3
1 and the photoreceptor 25 (under the condition that the distance from the cyst detection sensor 17 is longer than the distance between the contact point and the exposure position for forming a latent image), the image recording control circuit 71
Re is a signal requesting the storage means 52 (the storage means 53 prepares for writing the next document 2a) to read image information.
Output q. In response to this signal, the memory control circuit 64 of the storage means 52 generates synchronization signals R and L consisting of the detection signal of the synchronization detection plate 23 of the scanning light from the video control circuit 72.

Taking the timing with Sync, initializes the sub-scanning address management circuit 62 and the main-scanning address management circuit 61,
At the same time, the output of the synchronization signal switching circuit 69 is transferred to the image recording means 5.
The switching signal W/R is outputted so that the synchronization signals R, L, and 5ync from 4 and 5ync are output, and the storage circuit 63 is put into a read state.
Outputs R, F, and Gate to notify the start of reading image information. At the same time, the D-F/F circuit 65 is cleared and the selection signal of the selection circuit 66 is set to the B input. Eight-person power is a mode specially used for image editing, and is not particularly relevant to this embodiment. In other words, the cleared D-F/F circuit 65
By selecting B which inputs the Q output (High) of the AND gate 67, one input of the AND gate 67 becomes High.
Therefore, if the remaining inputs are made, the latch circuit 68
will be input.

Here, the memory control circuit 64 receives synchronization signals R and L.

In synchronization with Sync, it outputs gate signals R, L, Gate for outputting image information R, VD, and starts counting up the main scanning address management circuit 61.

As a result, the output of the AND gate 67 becomes High, and the latch circuit 68 is put into the image information output state, and the image information of the main scanning addresses "0" to "r" of the sub-scanning address "0" is transmitted! ? , VD.

Subsequently, when the synchronization signals R, L, and 5ync are input, the sub-scanning address management circuit 62 is counted up, the main-scanning address management circuit 61 is initialized at the same time, and the gate signals R, L, and Gate are similarly output, and the image The information R9VD is read out sequentially. The video control circuit 72 of the image recording means 54 receives image information readout start signals R, F, Ga from the storage means 52.
Input te, image information and gate signals R, L, Gat
Then, R, L, Gate and image information R8VD are input to a toggle buffer memory (not shown). Then, in the next cycle in which R, L, Gate and image information R0VD are input to another toggle buffer memory, the image information is read out from the previously input toggle buffer memory, and the scanning light is synchronized based on this image information. The semiconductor laser 18 is modulated in synchronization with the detection signal to create a latent image on the photoreceptor. Even at this point, the storage means 52 outputs the gate signal R every time the synchronization signals R, L, 5ync from the image recording means 54 are input.
0L, Gate and image information R, VD are output, and the address value of the sub-scanning address management circuit 62 is incremented by one. Then, the sub-scanning address value is the final value "address n"
When the signal “
NEXT” to the storage means 53, and the sub-scanning address “
Outputs image information from the main scanning address "θ address" of "n address" to "r address" together with gate signals R, L, and Gate;
When the next synchronization signals R, L, and 5sync are input, the output of the read start signal R0F and Gate is stopped. Since the writing to the storage means 53 has already been completed before that, the memory control circuit 63a of the storage means 53 inputs the read end signal NEXT of the storage means 52, and as described above,
The same procedure is repeated with the registration detection sensor 17 signal from the next recording medium 31.

If the above is normal (the ratio of the size of the recording medium in the transport direction and the size of the original in the sub-scanning (Y) direction, or the ratio of the size of the recording medium in the width direction and the size of the original in the main scanning (X) direction, matches the copy magnification) This is the procedure for writing and reading data into the storage means.

However, the copy magnification is not the above case, and the ratio of the size of the recording medium in the transport direction and the size of the document in the main scanning (X) direction, or the ratio of the size of the recording medium in the width direction and the size of the document in the sub-scanning (Y) direction. Copying can be performed without any problem even in cases where the values match (in other words, in the case described above, when the recording medium is set in the opposite direction).

The explanation is below.

First, in Figures 9 (A), (B), and (C), Figure 9 (A) performs normal sub-scanning of the image, and assumes that each element is likened to 7 tricks A with main scanning as a column. , a matrix B as shown in FIG. 9(B) or FIG. 9(C)
, C, an image rotated by 90° can be obtained.

When the size detection of the original document 2 is completed, it becomes clear (in the automatic paper feed selection mode) that there are recording media of sizes corresponding to the copying magnification that differ only in the setting direction. However, when writing, execute it in normal mode as mentioned above (even if you write irregularly from this stage, the result will be the same). The preset values of the sub-scanning address management circuit 62 and the main-scanning address management circuit 61 are set to 7! by the output of the signal Req requesting reading, respectively. Then, in the case of matrix B, = “0” and 1 = “ (
or for matrix C = nl−“O”)
far. Similarly, the memory control circuit 64 receives synchronization signals R, L,
In synchronization with 5sync, the gate signals R, L, and Gate for outputting the image information R0VD are outputted, and in the case of matrix B, the count-up of the sub-scanning address management circuit 62 is started. As a result, the main scanning address “r”
The image information of the sub-scanning address "O address" to "n address" of "Address" is read out as R and VD. Matrix C
In this case, the sub-scanning address management circuit 62 starts counting down. As a result, the image information from sub-scanning address "n" to "0" of main-scanning address "0" is R
, VD.

Subsequently, when the synchronization signals R0L and 5sync are input, in the case of matrix B, the main scanning address management circuit 61 is counted down, and at the same time, the sub-scanning address management circuit 62 is initialized (returned to the preset value 0), and the same process is performed. Outputs gate signals R, L, and Gate, and outputs gate signals R, L, and Gate to the sub-scanning address management circuit 6
Start counting up 2. In the case of matrix C, the main scanning address management circuit 61 is similarly counted up, the sub-scanning address management circuit 62 is simultaneously initialized (returned to the preset value "n'"), and the gate signal R0L is similarly increased.
, Gate, and the sub-scanning address management circuit 62 starts counting down. By sequentially repeating the above steps, the image information can be converted into matrix B or matrix C image information.

The purpose of dividing the storage means 52 and 53 into two is to avoid downtime due to the waiting time required for temporary writing and reading of 1 Lol copy, and this is done by the configuration shown in Japanese Patent Application Laid-Open No. 11977/1983. good.

The above operations are shown in the timing charts of FIGS. 10, 11, and 12. Furthermore, if there is a problem not only in the size ratio of the recording medium and the document but also in the type of the recording medium, it is necessary to detect the type (difference between plain paper, tracing paper, etc.). Further, the same effect can be obtained even if the recording medium is not only a sheet but also a roll paper. However, the size in this case is different from that of a sheet, and only the size information in the width direction perpendicular to the conveyance direction is a priority condition (because the length in the conveyance direction can be cut at any position with a cutter). In other words, as long as the ratio of the widthwise size of the roll paper and the size of the document in either the main scanning direction or the subscanning direction matches the copying magnification, the size in the transport direction can be cut to match the copying magnification of the original. You can get a copy of the image.

The differences from sheet paper will be explained below with reference to FIG. 13. FIG. 13 shows roll paper AI, A2. An embodiment of the image recording means 54 on A3 is shown.

Roll paper AI, A2. A3 size can be set freely depending on the paper quality, paper width, etc. of the recording medium according to the user's preference. Now, roll paper AI, A2. Assume that one roll paper that matches the original size is selected from among A3 sheets (A20-sized paper is selected for convenience). Since the distance from the roll paper A2 to the transfer position is long, driving of the motor 73 of the image recording control circuit 71 of the image recording means 54 shown in FIG. 8 is started immediately after the size of the original is detected. As a result, the feed roller pair B2 rotates, and the roll paper A2 with the leading edge aligned is transported immediately after the cutter C2, and when it reaches the sensor G2, the image recording control circuit 71 is configured to count the length of the roll paper A2 being transported. , synchronization signals R, L, 5ync consisting of detection signals of the synchronization detection plate 23 of the scanning light from the video control circuit 72
Start counting. Subsequently, when the leading edge of the roll paper A2 reaches the registration detection 17, the above-described Req is outputted and a predetermined image is formed.

By the way, the image recording means 54 continues to convey the roll paper A2, and at the same time the image recording control circuit 71 outputs synchronization signals R,
From the length calculated from the period of L, 5 sync, cutter C
At the time when the value obtained by subtracting the distance between the document 2 and the sensor G2 becomes equal to the copying magnification of the length of the document 2 in the main scanning or sub-scanning direction received from the system control means 56, the cutter C
2 to cut the roll paper A2, and at the same time stop the feed roller pair B2 to complete feeding of the roll paper A2. Incidentally, the sensor F2 detects the length in the width direction, and there are a plurality of sensors in the width direction. It goes without saying that the feed roller pairs B1, B3, cutters CI, C3, and sensors G1, G3 in the other roll papers AI, A3 operate in the same manner.

Furthermore, this embodiment allows effective use of the recording medium, and can also be used in the following manner. That is, the paper feed port 15 in FIG.
16 or the roll paper At of the set stage of FIG. 13, A2.
While using any one of A3, the recording medium 31
Even if there is a difference in the width of the roll paper or the setting direction of the cut paper, as long as the recording medium 31 whose two sides of the original 2 match the copying magnification is set, paper can be fed endlessly from there. , you can also get a copy.

Further, even when it is desired to change the feeding direction for each job (copying work) using the input means 55 and set the originals on the paper discharge tray 35, this can be done without changing the orientation of the originals, making later sorting easier. Furthermore, if the number of storage means 52, 53 is increased, the number of stored original images increases accordingly. Therefore, for example, in the case of 15 copies of 10 originals, if the storage means has 10 or more sheets, one copy is stacked on the ejection tray 35 in page order of the originals, and the next copy is stacked in the direction perpendicular to the direction of the stack. You can stack them, then stack the next part in the same direction as the first one, and so on.

Therefore, the purpose can be achieved without installing a sorter (a device for sorting), and it can be simplified using a smaller space.

Although this is the original usage, if there are two or more recording media 31 that correspond to the copy magnification of the original, the priority is given to the one that increases the copy speed (the one that is set horizontally in the R feeding direction). Needless to say, it is more advantageous.

In the case of roll paper, the copying speed increases when the paper is cut horizontally with respect to the transport direction.

〔Effect of the invention〕

As described above, the present invention can provide an image forming apparatus in which setting of a recording medium is simple and the space for setting is smaller than that of conventional apparatuses.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a front view showing an outline of the overall configuration of the embodiment, FIG. 2 is an enlarged front view of an image reading means, and FIG. 3 is an image recording means. 4 is a plan view of the image recording means, FIG. 5 is a block diagram of the entire control system, FIG. 6 is a block diagram of the control system of the image reading means, and FIG. 7 is a control of the image storage means. Fig. 8 is a block diagram of the control system of the image recording means, Fig. 9 is a block diagram of the control system of the image recording means.
The figures are explanatory diagrams of the image matrix, Fig. 10, Fig. 11,
FIG. 12 is a timing chart of each signal, and FIG. 13 is a front view showing another embodiment using roll paper. 2... Original document, 23.33... Recording medium size detection means, 31...
Recording medium, 32... Recording medium transport means, 51... Image reading means, 52.53... Image storage means, 54... Image recording means 55... Input means. Fig. 2 - Fig. 3 Fig. Fig. 13

Claims (1)

[Claims] Image reading means converts the original image into image information by scanning either the original image or an optical reading device, and sequentially writes the read image signals with addresses in the main scanning direction and the sub-scanning direction perpendicular to each other. An image storage means for storing images, a document size detection means for detecting the size of the document in the main scanning direction and the sub-scanning direction, and a document size detection means for reading out the stored image signals as appropriate and projecting light onto the photoreceptor to form a visible image on the photoreceptor. an image recording means for forming an image and transferring it onto a recording medium; a recording medium conveying means for selectively conveying recording media of various standard sizes placed at a plurality of locations to the image recording means; and conveying the recording medium. It has a recording medium size detecting means for detecting the size in the width direction perpendicular to the direction, and a copying magnification setting means, and the recording medium having a size corresponding to the copying magnification is selected and conveyed to the image recording means, and a predetermined In an image forming apparatus that obtains an image, a recording medium of a size matching the copy magnification of the original size is selected, and the main scanning direction or sub-scanning of the image storage means is determined by a combination of the recording medium setting direction and the original setting direction. An image forming apparatus characterized in that the image forming apparatus is configured to form an image on a selected recording medium by changing the address reading order in the direction.