JP2501193B2 - Wide range magnification copier - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a copying machine that performs variable magnification copying a plurality of times to obtain a copy having a designated copying magnification, thereby performing variable magnification copying over a wide range.

<Outline of the Invention> A copying machine according to the present invention has a magnification division copying means for obtaining a copy of a designated copy magnification by a plurality of times of variable magnification copying. When performing a plurality of times of variable magnification copying, copying is performed. This is to automatically select the paper of the required size so that the image does not run off the paper.

<Background of the Invention> A conventional variable-magnification copying machine performs copying at a designated copying magnification, for example, by adjusting the position of a zoom lens and the scanning speed of an optical system. For this reason, the operation section is provided with a zoom key for moving the copy magnification up and down at intervals of 1/100, for example, and the operator inputs the desired copy magnification by the operation or using the ten keys. However, there is a physical limit to the range of movement of the zoom lens and the range of the scanning speed of the optical system, and the copy magnification can be changed only within a specific settable range. For this reason, when an image with a copy magnification outside the settable range is required, the required copy magnification is divided by the copy magnification within the settable range to obtain an image with a desired copy magnification by a plurality of copying operations. I have to.

In Japanese Patent Laid-Open No. 61-2170, when an image having a copy magnification outside the settable range described above is required, the number of times of copying (copies) to be divided is calculated together with each magnification. In this publication, when the inputted copy magnification exceeds the maximum magnification, the required number of copying is calculated, and it is only stated that the copy magnification corresponding to this is calculated. No specific example of calculation is specified. In particular, there is only a description that the scaling factor for each number of times of copying is calculated for each number of times of copying, and the scaling factor for copying is set each time, and the optical system is set.

Therefore, it is necessary to set the copy magnification for each copy, the calculation for magnification conversion is very troublesome, the movement of the optical system becomes frequent, and it takes time to obtain a copy image of the target magnification. Take too much.

Moreover, according to the above-mentioned publication, the required paper is not selected every time the copying is performed, and the paper may be copied to a waste paper. For example, if the paper for obtaining the copied image with the target magnification is used as it is, all the images can be formed on the paper during the variable magnification copying, and the image with the target magnification cannot be obtained. .

<Object of the Invention> An object of the present invention is to provide a division ratio when a conversion magnification for a copying operation is out of a settable range and when copying is performed in a plurality of times with a copy magnification within the settable range. Set the copy magnification to 2 or less to prevent movement of the optical system as much as possible,
A wide-range variable-magnification copier that shortens the copying operation and automatically selects the paper size so that the size of the image after copying does not protrude from the paper after each variable-magnification copy is performed. To provide.

<Structure and Effect of the Invention> According to the present invention, a wide-range variable-magnification copying machine for achieving the above-described object is provided with a variable-magnification copying unit capable of performing variable-magnification up to a predetermined magnification, and a copyable magnification is provided. In a wide-range variable-magnification copying machine that performs desired variable-magnification copying by performing variable-magnification copying a plurality of times with respect to the set magnification exceeding the range, the magnification setting means for setting the copy magnification (A) (A) is a copy magnification determining means for determining whether or not the copy magnification is possible in one copy processing by the variable magnification copying means, and a magnification which the copy magnification determining means cannot execute in one copy processing. By determining (A), the divided copy magnification (M), the number of times X, and the final copy magnification (Z) in order to obtain the set magnification (A), the magnification obtained by A = M ^X · Z Splitting means, size of original (S) and the above-mentioned split copy magnification (M) Storage means for storing the length (C) of the copied image obtained based on the following as the size (Sn) of the next copy original, the original size (S) and the first division copying magnification (M), or the above The required minimum paper size corresponding to the length (C) of the copied image obtained each time by the copy original size (Sn) stored in the storage means and the division copy magnification (M) or the final copy magnification (Z). A sheet selection means for selecting, a copy process for each of X times by the division copy magnification (M), and a copying process by the final copy magnification (Z) for the sheet selected by the paper selection means, If the final copy magnification (Z) is other than "1", division copy magnification (M)
In each case, the copied sheet is conveyed as an original to the exposure scanning position, and the sheet copied at the Xth time is used as the final original, and the final copy at the final copy magnification (Z) is selected by the paper selecting means. The above-mentioned exposure scanning is performed on the printed sheet, or if the final copying magnification (Z) is "1", the copying paper is used as the original at each division copying magnification (M) up to the X-1th time. While transporting to the position,
Control means for performing final copying with the X-th copying paper as the final original on the paper selected by the above-mentioned paper selection means, using the X-th copying paper as the final original. With the above-described configuration, each time variable magnification copying is performed, the sheet size is stored without selecting the paper size for the next variable magnification copying based on the size of the selected original paper. Since the selection is made according to the size based on the copy image length, it is possible to form on a paper of a predetermined size without performing unnecessary copying on the paper and without missing the image of the document to be copied.

In this case, the magnification for variable-magnification copying is 2 or less,
Minimal movement of the optics is required, which saves time and makes it possible to quickly obtain the final copy.
Since the magnification is set below the seed, the calculation of the magnification becomes easy.

<Embodiment> FIG. 1 is a schematic structural diagram of a copying machine according to an embodiment of the present invention. A platen 10 is installed on the top of the device.
An exposure point P is set on a plane including 10 glass surfaces. Further, a document cylinder 1 which rotates and rotates a document is installed on the left side inside the apparatus. The original table 10 moves to the left and right during the copying operation, and the fixed exposure point P is the original table 10.
Scan the top document. An exposure lamp 11 is installed on the lower left of the exposure point P, and is composed of a first reflecting mirror 12, a copying lens 13 and a second reflecting mirror 14 so that the reflected light is imaged on the photosensitive drum 15. An optical system is formed. The first reflecting mirror 12 reflects the reflected light at the exposure point P on the optical axis of the copying lens 13, and the second reflecting mirror 14 reflects the image of the original document refracted by the copying lens 13 to the photosensitive drum 15. .

On the other hand, the exposure lamp 11 that irradiates the exposure point P and the first reflecting mirror 12 that reflects the reflected light of the exposure point P onto the optical axis of the copying lens 13 are rotatably supported, and are controlled by the control unit. Turn clockwise to the position shown by the chain double-dashed line in the figure.
An exposure point Q is set at a position symmetrical to the exposure point P with respect to the optical axis of the copying lens 13, and the exposure lamp 11 rotated to the position shown by the two-dot chain line irradiates the exposure point Q, The first reflecting mirror also rotated to the position shown by the chain double-dashed line
Reference numeral 12 reflects the reflected light at the exposure point Q onto the optical axis of the copying lens 13. The document cylinder 1 is installed at a position where the surface rotates along the exposure point Q.

A charger 3 is installed around the photosensitive drum 15 in the order of the copying process.
4, black developing device 35a, color developing device 35b, transfer charger
17, a charge removal charger 36, a charge removal lamp 37, and a cleaner 38 are provided, and the reflected light at the exposure point P or Q enters between the charger 34 and the developing devices 35a and 35b. A paper cassette 16 is installed in the lower right part of the main body of the apparatus, and a paper feed roller 39 is installed above it. Further, a fixing device 18 is arranged on the lower left side of the apparatus main body.

The paper feed roller 39 feeds the uppermost one of the sheets accumulated in the paper cassette 16 into the main body of the copying machine at a predetermined timing of the copying process. The fed paper is the photosensitive drum 1
5, the toner image on the photosensitive drum 15 is transferred by being conveyed between the transfer chargers 17 and corona discharge of the transfer charger 17. The sheet on which the toner image has been transferred is fixed by the fixing device 18 and conveyed to the discharge path.

A discharge guide 19 is installed on the discharge path. This paper discharge guide 19 is installed so as to be swingable up and down, and when it is moving upward, it guides the copied paper toward the paper discharge tray 26 installed on the left side of the apparatus and moves downward. Sometimes, the copied paper is guided toward the original cylinder 1. The discharge guide 19 is controlled by a control unit (not shown). A guide roller 5 is installed in the direction of the original cylinder 1 and conveys the conveyed paper to the original cylinder 1. A paper discharge roller 25 is arranged between the paper discharge tray 26 and the paper discharge guide 19.

FIG. 2 is a block diagram of the control unit of the copying machine. The entire control is performed by the program processing of the CPU 51, and the control program is written in the ROM 52 in advance. RAM
Reference numeral 53 is used as a working area such as a flag and a calculation register when the control program is executed. The optical system controller 55 controls the movement of the document table 10 and the document cylinder 1.
The control of the scanner motor 54 for controlling the rotation is performed based on the output signal of the CPU 51. The lens controller 56 controls the lens motor 58 that changes the zoom of the lens 13 based on the output signal of the CPU 51. The operation panel control unit 57 is a circuit that controls the operation panel 59 including a keyboard and a display unit, reads the content input by the key, outputs it to the CPU 51, and performs display control of the display unit based on the output signal of the CPU 51. .

3A and 3B are flowcharts showing the processing procedure of the control unit.

First, the copy magnification is input by operating various keys on the operation panel 59 shown in FIG. Reference numeral n10 corresponds to the copy magnification setting means and includes the operation panel 59 and the like. It is determined in n12 whether or not the set magnification A is within the range of the copy magnification that can be copied in one copy process. If n12 is a copy magnification determining means and the set magnification A is within the setting range, the lens motor 58 is moved to a position corresponding to the designated magnification A, and the drive speed of the scanner motor is set. To do. After that, when the print switch is operated, the platen is moved at a set speed, and the copying process is executed to perform copying (n18).

If the specified copy magnification A is outside the setting range, the division copy magnification M necessary to obtain a copy of the specified copy magnification A
Then, the number of times X and the final copy magnification Z are obtained (n2
0). n20 corresponds to the magnification dividing means of the present invention, and as shown in the formula, there are only two kinds of magnifications of the division copying magnification M and the final copying magnification Z, and the optical system can be moved by these two kinds of movements. In particular, if the final magnification Z is "1", only the division copying magnification M is required, and it is possible to eliminate unnecessary movement of the optical system and shorten the time required for variable magnification copying. Further, as understood from the arithmetic expression in n20 of FIG. 3 (A), the final copy magnification Z is
The set magnification A is divided by the division copy magnification M, and the divided value is
This value is the final copy magnification Z within the range of magnification that can be copied.
If it is out of the range, the division is repeated until the divided value at the magnification M is within the range of the magnification that can be copied.
The number X of divided copy magnifications M and the final copy magnification Z can be easily calculated. The length C of the copy image obtained as a result of the copy is obtained based on the magnification M of the divided copy thus obtained and the length S of the document placed on the document table (n22), and the copy image length is determined. Set the minimum size copy paper required to obtain it (n24). Further, by inputting the copy image length C to the original length Sn, the original length in the next copying process is determined. As shown in n26, the copy sheet size selected in n24 is set, and the divided copy magnification M is set. The length of the copied image formed as a result is stored as the document length S.

It is determined whether or not the required minimum paper size obtained in this way is set, and if not set, a warning display indicating that a paper of the required size is not installed is displayed (n300). After that, it is determined whether or not the document length Sn is the maximum length that can be copied (n302), and if it is the maximum length, a standby state is displayed with a warning displayed until a sheet of that size is set. If Sn is less than the maximum manuscript length that can be copied, it is determined whether the next largest paper size is loaded (n304). If the next largest paper size is loaded, that paper size is selected and the selection is displayed (n306). If the required size of paper has been set, control for copying at the division copy magnification M (movement of the lens motor, etc.) is performed, and the operation of the print switch is waited (n32 → n34). If the print switch is operated, the copy process is performed at the magnification M (n36).

After that, as shown in FIG. 3 (B), the counter X that counts the number of divided copies is decremented so that the value is 1
It is determined whether or not (n40).

Therefore, if the number of copies of the divisional copy magnification is X = 1,
From n40 to n42, the value of the final copy magnification Z is "1" at n42.
It is determined whether or not (Z = 1), and if the final copy magnification Z is "1", by the remaining one division copy magnification M,
When a copy with the target copy magnification can be obtained, the development tank is selected to develop with the specified color (n42
→ n46). After that, the copy process is performed after confirming that the document to be copied is wrapped around the document cylinder (n48 → n5
0) When the final copy magnification Z is other than "1" (n42 → n4
4) Alternatively, if the divided copy count X is still two or more (n40 → n52 → n44), the process waits until the document to be copied is wrapped around the document cylinder at n44. When the setting of the document is completed, the process returns to n22 as shown in FIG.

When the number of divided copies X times is completed, the same figure (B)
This is discriminated by n52 shown in the above, and the copying process is performed at the final copying magnification Z. First, the copy image length C obtained by copying is determined by the document length Sn stored as the document size corresponding to the final copy magnification Z and the copy image length formed at the divided copy magnification M at n26 (n54). Set the minimum paper size (n56). If the required size of paper is not loaded, step n300 in the figure (A)
As with the case of ~ n306, if the next largest paper size is loaded, select that paper, and if not, load the minimum required paper size. Wait (n600 to n604). When the required size of paper is loaded, the status is displayed (n606) and the lens motor is driven to move the lens to the position corresponding to the copy magnification Z (n64). N56, n58 and FIG. A)
n24 and n28 correspond to sheet selection means for selecting the minimum necessary size sheet according to the length of the copy image formed at the division copy magnification M or the final copy magnification Z. After that, the developing tank is selected so that the development is performed with the already designated color (n46), and when the original to be copied is wound around the original cylinder, the copying is started (n48 → n50). At this time, the scanner motor is driven at a speed corresponding to the copy magnification Z.

As described above, according to the copying machine of this embodiment, it is possible to perform copying at a wide range of copying magnification, which is impossible in a single copying process, and further, in the case of enlarged copying, copying is performed during division copying processing. It is possible to prevent the image from protruding from the paper. Moreover, when the required paper size that accommodates the copied image is not installed in the paper feed unit, a paper size larger than the required paper size is automatically selected, so that the copy of the desired size can be performed without interrupting the divisional copying. Images can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a copying machine according to an embodiment of the present invention;
FIG. 2 is a block diagram of the control unit of the copying machine, and FIGS. 3A and 3B are flowcharts showing the operation procedure of the control unit. 1 ... original cylinder, 16 ... paper cassette.

Claims (1)

(57) [Claims] 1. A variable magnification copying means capable of varying the magnification up to a predetermined magnification is provided, and a variable magnification copying is performed a plurality of times for a set magnification exceeding the range of the magnification that can be copied. In a wide-range variable-magnification copying machine that performs variable-magnification copying, a magnification setting unit for setting a copying magnification (A) and a set magnification (A) can be copied by one-time copying processing by the variable-magnification copying unit. Copy magnification determining means for determining whether or not it is a magnification and magnification (A) that the copy magnification determining means cannot execute in one copy process, thereby performing division copying to obtain the set magnification (A). Based on the magnification (M), the number of times X, and the final copying magnification (Z), the magnification dividing means obtained by A = M ^X .Z, the document size (S), and the division copying magnification (M). The length (C) of the copied image obtained by Storing means for storing the original document size (S) and the first divisional copy magnification (M), or the copy original size (Sn) and the divisional copying magnification (M) stored in the storage means, or Paper selection means for selecting the required minimum paper size according to the length (C) of the copy image obtained each time with the final copy magnification (Z), and X times of each copy processing by the division copy magnification (M). , And the final copying magnification (Z) is performed on the paper selected by the paper selecting means, and if the final copying magnification (Z) is other than “1”, the division copying magnification (M) is used. Each time the copied paper is conveyed to the exposure scanning position as an original, and the paper copied at the X-th time is used as the final original, and the final copy at the final copy magnification (Z) is selected by the paper selecting means. Run on paper Or conveys to the exposure scanning position in each case copied sheet in the final copy magnification (Z) is divided copy magnification to X-1 th if "1" (M) as a document, X
A control unit configured to execute the X-th division copying magnification (M) final copy for the sheet selected by the sheet selection unit, using the first copy sheet as the final original. A wide-range variable copying machine that features.