JP4766635B2 - Image forming apparatus, image forming apparatus control method, and storage medium - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image forming apparatus, a control method for the image forming apparatus, and a storage medium, and more particularly, an image forming apparatus suitable for feeding paper according to a user's request, a control method for the image forming apparatus, and a storage medium. About.
[0002]
[Prior art]
2. Description of the Related Art In recent years, digital image forming apparatuses having an automatic paper selection function that determines the size of a read document and automatically selects an optimal paper feed port have been developed in image forming apparatuses. In this automatic paper selection function in the digital image forming apparatus, when selecting an optimum paper feed port from a plurality of paper feed ports, it is provided for setting that the paper feed port provided in the digital image forming apparatus is not selected. When a switch (hereinafter abbreviated as “non-selectable switch”) is set to ON, each sheet feeding port is removed from the selection target.
[0003]
Also, in the digital image forming apparatus, setting the paper type for each paper feed slot means that the user inputs the desired paper type stored in the paper feed slot from the operation unit and Necessary for checking what kind of paper is in each paper feed slot when feeding paper and forming an image. The user selects another sheet feeding port in which an appropriate sheet is stored, feeds the sheet from the other selected sheet feeding port, forms an image, and outputs the image.
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional digital image forming apparatus, there is a paper feed port that feeds paper of a size that matches the paper size input by the user even though the paper type is specified. The paper feed port was automatically selected and fed. The only way to remove the paper feed slot from the selection target is to turn on the “non-selection switch” described above. Also, the switch must be reset to stop paper feeding when the copy mode is different.
[0005]
For example, in a digital multi-function peripheral having three paper feed ports (an apparatus having a plurality of functions such as an image reading function, an image forming function, and a facsimile function), a pre-punched sheet of colored paper is used for the paper feed port 1 and a paper feed port 2 is used. In the mode that automatically selects the paper feed slot when recycled paper and plain paper are in the paper feed slot 3, the paper size that matches the paper size entered by the user is not considered, especially the paper type. The paper feed port for feeding was automatically selected. For example, when the paper size of all the paper feed openings is A4 size and the paper input by the user is A4 size, the paper feed opening 1 that feeds the pre-punch paper even though the user wants to copy the plain paper. There was a problem of automatically selecting.
[0006]
  The present invention has been made in view of the above-described points, and when performing automatic selection of paper or automatic paper feed port change when paper runs out, paper feeding according to the user's request is performed more than the conventional function. Possible to do anddidAn object of the present invention is to provide an image forming apparatus, a method for controlling the image forming apparatus, and a storage medium.
[0007]
[Means for Solving the Problems]
  In order to achieve the above object, an image forming apparatus of the present invention includes a plurality of sheet feeding units, and an image forming unit that performs image formation using a sheet of any one of the plurality of sheet feeding units. A first mode in which image formation is performed using a sheet of any one of the first plurality of sheet types according to a user instruction and a detection unit that detects a sheet size of the document; A setting unit that sets a second mode in which image formation is performed using a sheet of any one of the sheet types, and the plurality of sheet feeding units.Based on the paper size and paper type set for the plurality of paper feeding means,Paper feeding means comprising paper of the paper size detected by the detection means, wherein paper feeding means comprises paper of any paper type among a plurality of paper types corresponding to the mode set by the setting means. And selecting means for selecting, and control means for controlling the image forming means to perform image formation using the paper of the paper feeding means selected by the selecting means.
[0008]
  In order to achieve the above object, an image forming apparatus control method according to the present invention includes a plurality of sheet feeding units and an image for executing image formation using a sheet of any one of the plurality of sheet feeding units. A method for controlling an image forming apparatus having a forming unit, wherein a paper step of detecting a paper size of an original is used, and a paper of any one of the first plurality of paper types is used according to a user instruction. A setting step for setting a first mode for executing image formation or a second mode for executing image formation using paper of any one of the second plurality of paper types; and the plurality of paper feeds From the means,Based on the paper size and paper type set for the plurality of paper feeding means,A paper feeding means comprising paper of a paper size detected by the detection step, wherein the paper feeding means comprises a paper of any paper type among a plurality of paper types corresponding to the mode set by the setting step. A selection step of selecting, and a control step of controlling the image forming unit to execute image formation using the paper of the paper feeding unit selected in the selection step.
[0009]
  In order to achieve the above object, a storage medium of the present invention includes a plurality of sheet feeding units and an image forming unit that performs image formation using a sheet of any one of the plurality of sheet feeding units. In accordance with a detection process for detecting the paper size of the original and a user instruction, the computer that controls the image forming apparatus has image formation using one of the first plurality of paper types. A setting step for setting a second mode in which image formation is performed using a sheet of any one of the first mode and the second plurality of sheet types, and the plurality of sheet feeding units,Based on the paper size and paper type set for the plurality of paper feeding means,A paper feeding means comprising paper of a paper size detected by the detection step, wherein the paper feeding means comprises a paper of any paper type among a plurality of paper types corresponding to the mode set by the setting step. A computer-readable program storing a program for executing a selection step for selecting and a control step for controlling the image forming unit to perform image formation using the paper of the paper feeding unit selected in the selection step It is a characteristic storage medium.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0030]
[First Embodiment]
FIG. 2 is a block diagram showing the internal structure of the image forming apparatus (copier) according to the first embodiment of the present invention. The image forming apparatus according to the first embodiment of the present invention includes a reader unit 1, a printer unit 2, a sorter 230, and a punch unit 250. Further, the reader unit 1 includes a document feeder 101, a document table glass surface 102, a scanner unit 104 having a lamp 103 and a mirror 105, a mirror 106, a mirror 107, a lens 108, and a CCD image sensor unit (hereinafter abbreviated as CCD) 109. The printer unit 2 includes an exposure control unit 201, a polygon mirror 207, a photoconductor 211, a developing device 212, a transfer unit 216, a fixing unit 217, a paper discharge unit 218, a discharge roller 219, a conveyance direction switching member 220, and a re-feed. The paper stacking unit 221 and the paper stacking units 214, 215, 225, and 226 are provided, and the sorter unit 230 includes bins 241, 242, and the like.
[0031]
Documents stacked on the document feeder 101 are sequentially conveyed onto the document table glass surface 102 one by one. When the original is conveyed to a predetermined position on the glass surface 102, the lamp 103 of the scanner unit is turned on, and the scanner unit 104 moves to irradiate the original. The reflected light of the document is input to the CCD 109 via the mirrors 105, 106, 107 and the lens 108. Details of the printer unit 2 will be described later.
[0032]
The sorter 230 also includes an entrance roller 231, a transport path switching member 232, a paper discharge roller 233, a vertical transport path 234, a saddle stacker 235, a saddle positioning roller 236, a saddle butting roller 237, a saddle butting member 239, and a saddle positioning member. 240 is provided.
[0033]
FIG. 1 is a block diagram showing a signal processing configuration of the reader unit 1 of the image forming apparatus according to the first embodiment of the present invention. The reader unit 1 of the image forming apparatus according to the first embodiment of the present invention includes a CCD 109, amplifiers 110R, 110G, and 110B, an A / D converter 111, a shading circuit 112, a Y signal generation / color detection circuit 113, a conversion circuit. Double / repeat circuit 114, contour / edge enhancement circuit 115, marker area determination / contour generation circuit 116, patterning / thickening / masking / trimming circuit 117, image selector circuit 118, laser driver circuit 119, image memory 120, connector 121 A CPU circuit 122 having a ROM 125 and a RAM 126, an operation unit 123, an image data reduction circuit 124, and a document size detection sensor 127.
[0034]
The above configuration will be described in detail along with the operation. The reflected light of the original irradiated to the CCD 109 is photoelectrically converted and converted into electrical signals of red, green and blue colors. The color information from the CCD 109 is amplified in accordance with the input signal level of the A / D converter 111 in the next amplifiers 110R, 110G, and 110B. The output signal from the A / D converter 111 is input to the shading circuit 112, where the light distribution unevenness of the lamp 103 and the sensitivity unevenness of the CCD 109 are corrected. A signal from the shading circuit 112 is input to a Y signal / color detection circuit 113 and an external I / F switching circuit (not shown).
[0035]
The Y signal generation / color detection circuit 113 includes a Y signal generation circuit that obtains a Y signal by calculating the signal from the shading circuit 112 using the following equation.
[0036]
Y = 0.3R + 0.6G + 0.1B
Further, the Y signal generation / color detection circuit 113 has a color detection circuit that separates the R, G, and B signals into seven colors and outputs a signal for each color. An output signal from the Y signal generation / color detection circuit 113 is input to the scaling / repeat circuit 114.
[0037]
Depending on the scanning speed of the scanner unit 104, scaling in the sub-scanning direction is performed, and scaling in the main scanning direction is performed by the scaling circuit / repeat circuit 114. A plurality of identical images can be output by the scaling / repeat circuit 114. The contour / edge emphasis circuit 115 obtains edge emphasis and contour information by emphasizing the high frequency component of the signal from the scaling / repeat circuit 114. The signal from the contour / edge enhancement circuit 115 is input to the marker area determination / contour generation circuit 116 and the patterning / thickening / masking / trimming circuit 117.
[0038]
A marker area determination / contour generation circuit 116 reads a portion of a document written with a marker pen of a specified color, generates marker contour information, and the next patterning / weighting / masking / trimming circuit 117 generates the contour. Thicken, mask or trim from information. Further, patterning is performed by the color detection signal from the Y signal generation / color detection circuit 113.
[0039]
When the output signal from the patterning / thickening / masking / trimming circuit 117 is output to the printer unit 2, it is selected by the image data selector 118 described later, and is input to the laser driver circuit 119 for variously processed signals. The signal is converted into a signal for driving the laser. The output signal of the laser driver circuit 119 is input to the printer unit 2 and image formation is performed as a visible image.
[0040]
The image memory 120 stores and reads out the image data sent from the image data selector 118 at a designated position in the image memory 120 according to an instruction from the CPU circuit unit 122, as will be described later, and performs rotation processing and synthesis of the image on the memory. Has a function to do.
[0041]
The CPU circuit 122 controls the reader unit 1, and includes a ROM 125 that stores a control program, an error processing program, and the like, a RAM 126 that is used for a work area of various programs, and various timer control units. The Document size detection sensor 127 is arranged on document table glass surface 102, detects the size of the document, and outputs a detection signal to CPU 122. The CPU circuit 122 determines the document size based on the detection signal of the document size detection sensor 127.
[0042]
The operation unit 123 includes various key groups for instructing image operations such as image editing contents and the number of copies for image processing of the reader unit 1, a display unit for displaying the contents at the time of operation, and the like.
[0043]
FIG. 4 shows details of the operation unit 123 of the present embodiment. In the operation unit 123, various keys and a liquid crystal display unit 438 composed of a dot matrix composed of a liquid crystal display device are arranged.
[0044]
The liquid crystal display unit 438 displays the state of the apparatus, the number of copies, the magnification, the selected paper, and various operation screens, and is operated by the control keys 431 to 435 and the like. A start key 403 is a key for starting copying, and a return key 402 is a key for returning the setting mode to the standard state. A key group 405 is a numeric keypad from 0 to 9 for inputting the number of copies, zoom magnification, and the like, and a clear key for clearing the input. The density key 407 is a key for increasing / decreasing the density, and the density adjusted thereby is displayed on the liquid crystal display unit 438.
[0045]
A key group 437 is a key for turning on / off the automatic density adjustment function and its display unit, and a key 406 is a key for selecting a paper feed port and auto paper selection. This selection state is a liquid crystal display unit. 238. Keys 408 and 410 are keys for setting the same size and fixed size reduction / enlargement, respectively. A key 418 and a display unit 417 are keys for setting the auto scaling mode, and this selection state is also displayed on the liquid crystal display unit 438. A key 440 is a user mode key that enables individual setting by the user. By pressing the user mode key 440, a paper type to be described later is set.
[0046]
Next, the configuration and operation of the printer unit 2 will be described with reference to FIG. The image signal input to the printer unit 2 is converted into an optical signal modulated by the exposure control unit 201 and irradiates the photosensitive member 211. The latent image created on the photosensitive member 211 by the irradiation light is developed by the developing device 212. The paper is transported from the paper stacking unit (paper feed port) 214 or 215 together with the leading edge of the developed image, and the developed image is transferred by the transfer unit 216.
[0047]
The transferred image is fixed on the paper by the fixing unit 217 and then discharged from the paper discharge unit 218 to the outside of the apparatus. The paper output from the paper discharge unit 208 passes through the punch unit 250. When the punch function is working, the paper is punched and transferred to the sorter 230. When the sort function is working in the sorter 230, each bin is printed. Or if the sort function is not working, it is discharged to the top bin of the sorter.
[0048]
Next, a method for outputting sequentially read images on both sides of one output sheet will be described. The output paper fixed by the fixing unit 217 is once transported to the paper discharge unit 218 and then transported to the paper refeeding paper stacking unit 221 via the transporting direction switching member 220 with the paper transport direction reversed. When the next original is prepared, the original image is read in the same manner as in the above process. However, since the paper is fed from the paper refeeding paper stacking unit 221, two sheets are provided on the front and back surfaces of the same output paper. Original image can be output.
[0049]
A method for setting the paper type will be described with reference to FIG. Assume that B4 size is stored in the paper feed port 1, A4 size is stored in the paper feed port 2, A4 size is stored in the paper feed port 3, and A4 size paper is stored in the paper feed port 4. The paper feed port 1 corresponds to the paper stacking unit 214, the paper feed port 2 corresponds to the paper stacking unit 215, the paper feed port 3 corresponds to the paper stacking unit 225, and the paper feed port 4 corresponds to the paper stacking unit 226. When the user mode key 440 of the operation unit 123 is pressed, an operation screen shown in FIG. 5A is displayed on the liquid crystal display unit 438. A key 701 is a common function setting key for setting a common function for machine operation. A key 703 is a key for setting a copy mode, and sets auto rotation on / off and the like. A key 702 is for adjustment cleaning, and sets zoom adjustment and the like. A key 704 is a key related to timer setting, and the date and time can be set by pressing this key.
[0050]
When the key 701 is pressed, an operation screen shown in FIG. 5 (2) is displayed. This key 701-1 is a key for setting the type of paper. When this key is pressed, an operation screen shown in FIG. 5 (3) is displayed. By pressing keys 701-2 to 701-5 on this screen, the operation screen of FIG. 5 (4) is displayed, and the user can set the paper type for each paper feed slot. In this way, on the operation screen shown in FIGS. 5 (3), (4), etc., the user performs in advance an operation for designating the type of paper for each paper feed slot, whereby the image forming apparatus. Can acquire paper type information and determine the paper type for each paper feed slot.
[0051]
In addition, a reflection type optical sensor (not shown) is provided for each paper feed port, and the type of paper is determined using the sensor, such as determining the type of paper according to the reflectance detected by the sensor. Such a configuration may be used. Further, the paper size information may be obtained from user input information from the operation unit, or may be obtained by size detection by a sensor.
[0052]
In this embodiment, when an image is to be formed using a certain type of paper of a certain size, when there is no paper of that type at the start of image formation, or when that type of paper is present during the image forming operation. When there are no more papers, a different type of paper of the same size is selected according to a predetermined priority order, and image formation is performed on the selected paper.
[0053]
The CPU circuit unit 122 uses the CPU circuit unit 122 to set the paper type information, the paper type priority information, and the setting information related to the auto cassette change set by the user on the operation screens shown in FIGS. 5 (3) to 5 (6). Stored in the RAM 126. Paper size information set on a screen (not shown) is also stored in the RAM 126 by the CPU circuit unit 122. The CPU circuit unit 122 appropriately reads out such information from the RAM 126.
[0054]
As a result, the image forming apparatus can recognize which type and size of paper is stored in which paper feed port, and prioritize the paper (paper feed port) to be used for image formation. The order and the like can also be recognized.
[0055]
Note that the “thick paper” displayed on the operation screen shown in FIG. 5 (4) is, for example, a waist having a thickness larger than that of a normal paper used for a cover or interleaf for bookbinding. Strong paper, "second original paper" is a thin paper with a lower thickness than normal paper, such as paper for design drawings, and "punch paper" means pre-punch paper In addition, since the punch unit 250 does not require punching processing because a hole is formed in advance at a predetermined position, the “label paper” is a paper for sealing, and “letterhead paper” For example, it is a sheet on which an image is previously formed at a predetermined position, such as a company logo.
[0056]
Now, the paper fed from the paper feed slot 1 is set to plain paper. Similarly, the paper fed from the paper feed port 2 is set as colored paper, the paper fed from the paper feed port 3 is set as recycled paper, and the paper fed from the paper feed port 4 is set as plain paper.
[0057]
A key 701-6 shown in FIG. 5 (2) is a key for setting the priority order of paper types. When this key is pressed, an operation screen shown in FIG. 5 (5) is displayed. On this screen, it is possible to set the priority order in the automatic paper feed selection for each paper type. Now, with the numeric keypad, the priority order of plain paper is set to 1, the priority order of recycled paper is set to 2, the priority order of colored paper is set to 3, and the priority order of thick paper is set to 4.
[0058]
A key 701-7 shown in FIG. 5 (2) is used to determine whether or not to change the paper feeding port (auto cassette change) when there is no paper in the paper feeding port that is feeding paper during image formation. When this key is pressed, an operation screen shown in FIG. 5 (6) is displayed. This screen includes a key 701-10 “auto cassette change to a different paper type”. By turning on this key 701-10, the paper feed port is automatically set according to the priority set in FIG. 5 (5). To choose.
[0059]
FIG. 18 is an explanatory diagram showing a conceptual example in which a program and related data according to each embodiment of the present invention are supplied from a storage medium to the apparatus. The program and related data are supplied by inserting a storage medium 171 such as a floppy (registered trademark) disk or a CD-ROM into an insertion slot of a storage medium drive 173 provided in the apparatus 172. After that, the program and related data are temporarily installed from the storage medium 171 into the hard disk and loaded from the hard disk into the RAM, or directly loaded into the RAM without being installed in the hard disk, so that the program and related data can be executed. Become.
[0060]
In this case, when the program is executed in the image forming apparatus according to each embodiment of the present invention, for example, the program and related data are supplied to the image forming apparatus according to the procedure shown in FIG. By storing the program and related data in the apparatus in advance, the program can be executed.
[0061]
FIG. 17 is an explanatory diagram showing a configuration example of storage contents of a storage medium storing a program and related data according to each embodiment of the present invention. The storage medium includes storage contents such as volume information 161, directory information 162, a program execution file 163, a program related data file 164, and the like. The program is a program code based on a flowchart described later.
[0062]
Next, in the image forming apparatus according to the first embodiment of the present invention configured as described above, the operation using the setting of the paper type will be described in detail with reference to the flowcharts of FIGS. These processes are performed by the CPU circuit unit 122 of the image forming apparatus reading and executing a program stored in the ROM 125.
[0063]
First, sheet feeding port selection will be described with reference to FIGS. First, it is determined by the document detection sensor 130 provided on the document tray whether or not there is a document on the document tray of the document feeder 101 shown in FIG. 2 (step S801). At this time, if there is no document on the document tray of the document feeder 101, the document on the document table glass surface 102 detected by the document size detection sensor 127 disposed below the document table glass surface 102 is detected. The size is referred to (step S803). If there is a document on the document tray of the document feeder 101, the document feeder 101 feeds the document onto the platen glass surface 102 (step S802), and the width direction position detection result of the document guide 135 is detected. The document size is detected based on the length detection result by the sensor 140 when the document is conveyed onto the document table glass surface 102 (step S804). Since the document guide width is 297 mm and the document transport length is 210 mm, it is detected that the document size is A4.
[0064]
The document size data may be acquired by a user input operation from the operation unit 123.
[0065]
Next, the optimum sheet for the A4 size document is selected. Since the paper sizes of the paper feed ports 1 to 4 are B4, A4, A4, and A4, respectively (step S805), first, the paper feed port 2 in which a paper having a size corresponding to the size of the input document image is stored. The paper feed port 3 and the paper feed port 4 are automatic paper selection targets, that is, paper feed selection targets (candidates). In this, it is checked whether or not there is actually a sheet (step S806). The presence or absence of paper in each paper feed slot is detected by a sensor (not shown). In this example, since paper is loaded in each paper feed slot, all the paper feed slots are determined as paper feed selection targets (step S807). If there is no paper, it is excluded from the paper feed selection target (step S808).
[0066]
Next, it is determined whether or not the check in step S806 has been completed for each of the paper feed ports (step S809). If the check has been completed, it is determined whether or not there is a paper feed port to be fed. Determination is made (step S810). Here, if there is no paper feed port to be fed, “no optimal size” is displayed on the operation unit 123, and the operation is terminated (step S818).
[0067]
Next, as the paper type, the paper types of the paper feed port 2, the paper feed port 3, and the paper feed port 4 are checked. In this example, the paper type of the paper feed port 2 is colored paper, the paper type of the paper feed port 3 is recycled paper, and the paper type of the paper feed port 4 is plain paper (step S811). At this time, it is determined whether or not the paper type of each paper feed slot matches a predetermined prohibition condition (step S812). The predetermined prohibition condition is a condition that the types of OHP paper, second original drawing paper, and thick paper are not selected, and in this example, each of the paper feed ports does not meet this condition. Therefore, each paper feed port is a paper feed selection target (step S813). On the other hand, if the prohibition condition is met, it is excluded from the paper feed selection target (step S814).
[0068]
Next, it is determined whether or not the process for checking whether or not each sheet feeding port matches the prohibition condition in step S812 has been completed (step S815). It is determined whether there is a paper feed port (step S816). Here, if there is no paper feed port to be fed, “no optimal size” is displayed on the operation unit 123, and the operation is terminated (step S818).
[0069]
Therefore, in this example, the sheet feeding port 2, the sheet feeding port 3, and the sheet feeding port 4 are the sheet feeding ports to be fed. Next, the priority order set for the paper type of each paper feed port to be fed is checked (step S817). Now, since the paper type of the paper feed port 2 is colored paper, priority 3 and the paper type of the paper feed port 3 is recycled paper, so priority 2 and the paper type of the paper feed port 4 are plain paper. Therefore, the priority is 1. Among these, the paper feed port 4 having the highest priority is selected as the optimum paper feed port (step S819), and copying is started using the paper in the paper feed port (step S820).
[0070]
Next, automatic switching of the paper feeding port when the paper feeding port selected as the optimum is out of paper will be described with reference to FIGS. In this example, B4 size paper is supplied to the paper supply port 1, A4 size paper is supplied to the paper supply port 2, A4 size paper is supplied to the paper supply port 3, and A4 size paper is supplied to the paper supply port 4. Suppose that they were in each. Now, in the operation unit 123, the paper type of each paper feed port is set to “plain paper” for the paper feed port 1, “colored paper” for the paper feed port 2, “plain paper” for the paper feed port 3, and the paper feed port 4 for the paper feed port 4. It is assumed that “plain paper” is set. Assume that 100 copies of an A4 size document are to be copied, and copying starts with 100 sheets in the sheet feed slot 2, 20 sheets in the sheet feed slot 3, and 50 sheets in the sheet feed slot 4.
[0071]
First, it is determined whether there is a document by the document detection sensor 130 provided on the document tray of the document feeder 101 shown in FIG. At this time, when there is no document on the document table tray, the document size detected by the document size detection sensor 127 disposed below the surface of the document table glass 102 is referred to. When there is a document on the document feeder 101, the document size is detected based on the guide width of the document and the length of the document transported on the platen glass surface 102. Now, since the document guide width is 297 mm and the document transport length is 210 mm, it is detected that the document size is A4 (step S901).
[0072]
Next, the optimum sheet for the A4 size document (that is, the sheet feeding unit) is selected. Since the paper sizes of the paper feed ports 1 to 4 are B4, A4, A4, and A4, respectively (step S902), first, the paper feed port 2, the paper feed port 3, and the paper feed port 4 are targets for automatic paper selection. That is, it becomes a selection target of paper feed. It is checked whether or not there is actually a sheet (step S903). In this example, since paper is loaded in each paper feed slot, all the paper feed slots are determined as paper feed selection targets (step S904). If there is no paper, it is excluded from the paper feed selection target (step S905).
[0073]
Next, it is determined whether or not the check in step S903 has been completed for each of the paper feed ports (step S906). If the check has been completed, it is determined whether or not there is a paper feed port to be selected for paper feed. Determination is made (step S907). If there is no paper feed port to be fed, the operation unit 123 is displayed with no optimum size, and the operation is stopped (step S922).
[0074]
Next, as the paper type, the paper types of the paper feed port 2, the paper feed port 3, and the paper feed port 4 are checked (step S908). The paper type of the paper feed port 2 is colored paper, the paper type of the paper feed port 3 is plain paper, and the paper type of the paper feed port 4 is plain paper. At this time, it is determined whether the paper type of each paper feed opening matches a predetermined prohibition condition (step S909). The predetermined prohibition condition is a condition that the types of OHP paper, second original drawing paper, and thick paper are not selected, and each paper feed port does not meet this prohibition condition. Therefore, each paper feed port is selected (step S910). If the prohibition condition is met, it is excluded from the selection target (step S911).
[0075]
Next, it is determined whether or not the processing for checking whether or not each of the paper feed ports matches the prohibition condition in step S909 has been completed (step S912). If the processing has been completed, It is determined whether or not there is a paper mouth (step S913). Here, if there is no paper feed port to be fed, it is displayed on the operation unit 123 that there is no optimum size (step S922).
[0076]
Accordingly, the sheet feeding port 2, the sheet feeding port 3, and the sheet feeding port 4 are set as the sheet feeding selection target. Next, the priority order set for the paper type of each paper feed slot is checked (step S914). Now, since the paper type of the paper feed slot 2 is colored paper, priority 3 and the paper type of the paper feed slot 3 is plain paper, so priority 1 and the paper type of the paper feed slot 4 is plain paper. Therefore, the priority is 1. Among these, the paper feed port with the highest priority is the paper feed port 3 and the paper feed port 4. Of the sheet feeding port 3 and the sheet feeding port 4, the sheet feeding port 3 has a shorter transport path (that is, closer to the image forming unit) as shown in FIG. The sheet feeding port 3 is selected as the optimum sheet feeding port (step S915), and copying is started using the sheet of the unit (step S916). At this time, the CPU circuit unit 122 stores the paper feed port, paper size, and paper type to be used in the RAM 126 as the paper feed port 3, A4 size, and plain paper, respectively.
[0077]
  A sheet (plain paper) is fed from the sheet feed port 3 to start copying, and 20 sheets are output from the sheet feed port 3. After 20 sheets are output, no paper is left in the paper feed slot (in step S918).NO), A search is made for a paper feed port that can feed paper from other paper feed ports (step S919). The A4 size paper feed ports are the paper feed port 2 and the paper feed port 4. At this time, since the paper type of the paper feed port 2 is colored paper, the paper feed port 4 is plain paper, and the currently fed paper type is plain paper, the paper feed port 2 is more suitable for the image forming unit. However, the sheet feeding port 4 is selected and the sheet feeding is continued (step S920). After 50 sheets are output from the paper supply port 4, the paper supply port 4 runs out of paper.
[0078]
Next, the remaining paper feed ports that can feed A4 size paper are two. Since the paper type currently fed is plain paper, it does not match the paper type of the paper feed slot 2. Therefore, the switch of “auto cassette change (ACC) of different paper type” set in the operation unit 123 is confirmed (step S921). If this switch is on, the paper feed port 2 is changed to continue paper feeding (step S920). When this switch is off, the paper feeding operation is stopped, and a message indicating that there is no paper is displayed on the operation unit 123.
[0079]
In this way, for example, when there is no paper in the paper during image formation using a certain type of paper of a certain size (or when there is no such type of paper already at the start of image formation). In the case of a state, the type is different from the above-mentioned paper, but there is no particular trouble in forming an image (for example, an image lacking in an output result or a user instruction). If there is a paper candidate that does not cause a trouble such as an image being shrunk regardless of the image, image formation can be continued (or started) using the paper. In addition, the CPU of the CPU circuit unit 122 checks the setting state of the switch and reflects the confirmation result in order to reflect the intention of the user as to whether or not such a paper substitute output process may be performed. Thus, control is performed to prohibit or permit the above processing.
[0080]
As described above, according to the first embodiment of the present invention, the reader unit 1 that scans a document and converts it into image data, the printer unit 2 that prints on a sheet based on the image data, and the sheet In an image forming apparatus having a plurality of paper feed ports 214, 215, 225, and 226 for storing and feeding paper, a document size detection sensor 127 that detects a document size, and an operation unit that inputs a paper type of the paper feed port 123, and a CPU circuit 122 that selects a paper feed port that can feed paper from a plurality of paper feed ports based on the document size detected by the document size detection sensor 127 and the paper type input by the operation unit 123. Therefore, by setting the paper type, it is possible to perform paper feeding as desired by the user rather than the conventional function when automatically selecting paper or changing the automatic paper feeding port when paper runs out And . Further, it is possible to solve the problem that the automatic paper selection must be reset for each mode by the copy mode, and it is possible to copy by automatic paper selection without worrying about the copy mode.
[0081]
[Second Embodiment]
The image forming apparatus according to the second embodiment of the present invention includes a reader unit 1, a printer unit 2, a sorter 230, and a punch unit 250, as in the first embodiment. The reader unit 1 further includes a document feeder 101, a document table glass surface 102, a scanner unit 104 having a lamp 103 and a mirror 104, a mirror 106, a mirror 107, a lens 108, and a CCD 109. The printer unit 2 controls exposure control. Section 201, polygon mirror 207, photosensitive member 211, developing device 212, transfer section 216, fixing section 217, paper discharge section 218, discharge roller 219, transport direction switching member 220, paper refeeding paper stacking section 221, paper stacking section 214, 215, 225, and 226, and the sorter unit 230 includes bins 241 and 242 (see FIG. 2 above). Since the details of each part have been described above, the description thereof will be omitted.
[0082]
The reader unit 1 of the image forming apparatus according to the second embodiment of the present invention includes a CCD 109, amplifiers 110R, 110G, and 110B, an A / D converter 111, a shading, as in the first embodiment. Circuit 112, Y signal generation / color detection circuit 113, scaling / repeat circuit 114, contour / edge enhancement circuit 115, marker area determination / contour generation circuit 116, patterning / thickening / masking / trimming circuit 117, image selector circuit 118, a laser driver circuit 119, an image memory 120, a connector 121, a CPU circuit 122 having a ROM 125 / RAM 126, an operation unit 123, an image data reduction circuit 124, and a document size detection sensor 127 (see FIG. 1 above). Since the details of each part have been described above, the description thereof will be omitted.
[0083]
Next, with reference to FIGS. 11 to 13, an operation when a sheet processing apparatus having a stapling function or an apparatus having a punching function (punch unit 250 in FIG. 2) is connected to the image forming apparatus will be described. To do. Assume that the paper in the paper feed port is B4 in the paper feed port 1, A4 in the paper feed port 2, A4 in the paper feed port 3, and A4 paper in the paper feed port 4. Now, in the operation unit 123, the paper type of each paper feed port is set to “plain paper” for the paper feed port 1, “pre-punch paper” for the paper feed port 2, “plain paper” for the paper feed port 3, and the paper feed port 4. Is set to “plain paper”. It is assumed that 100 copies of an A4 size document are copied, and the setting for punch punching is performed on the operation unit 123.
[0084]
First, it is determined whether or not there is a document by a document detection sensor (not shown) provided on a document tray of the document feeder 101 shown in FIG. At this time, if there is no document on the document table tray, the size of the document on the document table glass surface 102 detected by the document size detection sensor 127 disposed below the document table glass surface 102 is referred to. When there is a document in the document feeder 101, the document is fed by the document feeder 101 onto the platen glass surface 102, and the guide width of the document and the length of the document conveyed on the platen glass surface 102 Based on the above, the document size is detected. Now, since the document guide width is 297 mm and the document transport length is 210 mm, it is detected that the document size is A4 (step S1001).
[0085]
Next, the optimum sheet for the document A4 size is selected. Since the paper sizes of the paper feed ports 1 to 4 are B4, A4, A4, and A4, respectively (step S1002), first, the paper feed port 2, the paper feed port 3, and the paper feed port 4 are targets for automatic paper selection. . It is checked whether or not there is actually a sheet (step S1003). Since each paper feed slot contains paper, it is selected as a paper feed selection target (step S1004). If there is no paper, it is excluded from the paper feed selection target (step S1005).
[0086]
Next, it is determined whether or not the confirmation in step S1003 has been completed for each of the paper feed ports (step S1006). If the confirmation has been completed, it is determined whether or not there is a paper feed port to be selected for paper feed. Determination is made (step S1007). If there is no paper feed port as a paper feed selection target, “no optimal size” is displayed on the operation unit 123, and the operation is terminated (step S1026).
[0087]
Next, as the paper type, the paper types of the paper feeding port 2, the paper feeding port 3, and the paper feeding port 4 are checked (step S1008). The paper type of the paper feed port 2 is pre-punched paper, the paper type of the paper feed port 3 is plain paper, and the paper type of the paper feed port 4 is plain paper. At this time, it is determined whether the paper type of each paper feed opening matches a predetermined prohibition condition (step S1009). The predetermined prohibition condition is a condition that the types of OHP paper, second original drawing paper, and thick paper are not selected, and each paper feed port does not meet this prohibition condition. Accordingly, each paper feed port is set as a paper feed selection target (step S1010). If they match, they are excluded from the paper feed selection targets (step S1011).
[0088]
Next, it is determined whether or not the process for checking whether or not each sheet feeding port matches the prohibition condition in step S1009 has been completed (step S1012). It is determined whether there is a paper mouth (step S1013). Here, if there is no paper feed port to be selected, no optimum size is displayed on the operation unit 123, and the operation is terminated (step S1026). In this case, since the punch hole is set to be punched (NO in step S1014), the pre-punched paper is originally perforated, so the paper feed port 2 is excluded from the paper feed target (step S1016).
[0089]
Accordingly, the paper feed port 3 and the paper feed port 4 are set as paper feed ports to be fed (step S1015). Next, it is determined whether or not the determination in step S1014 has been completed for each of the sheet feeding ports (step S1017). If the determination has been completed, it is determined whether or not there is a sheet feeding port to be fed. (Step S1018). Here, if there is no paper feed port to be selected, no optimum size is displayed on the operation unit 123, and the operation is terminated (step S1026).
[0090]
Next, the priority set for the paper type of each paper feed slot is checked (step S1019). Now, since the paper feed port 3 is plain paper, the priority is 1, and since the paper feed port 4 is plain paper, the priority is 1. Among these, the paper feed port with the highest priority is the paper feed port 3 and the paper feed port 4. Among the paper feed ports 3 and 4, the paper feed port 3 has a shorter transport path as shown in FIG. 2, and therefore the paper feed port 3 is selected as an optimal paper feed port (step S1020), copy is started (step S1021). At this time, the CPU circuit unit 122 stores the paper feed port, paper size, and paper type to be used in the RAM 126 as the paper feed port 3, A4 size, and plain paper, respectively.
[0091]
Copying is started from the paper feed port 3 and 20 sheets are output from the paper feed port 3. After the 20 sheets are output, no paper is left in the paper feed slot (NO in step S1023), and a search is made for a paper feed slot that can feed paper from another paper feed slot (step S1024). The paper feed port that contains A4 size paper is the paper feed port 4. At this time, the paper type of the paper supply port 4 is plain paper, and the currently fed paper type is plain paper, so the paper supply port 4 is selected (step S1025) and the paper supply is continued. After 50 sheets are output from the paper supply port 4, the paper supply port 4 runs out of paper.
[0092]
Next, the remaining paper feed ports that can feed A4 size paper are two. Since the paper type currently fed is plain paper, it does not match the paper type of the paper feed slot 2. Since the paper type of the paper feed slot 2 is pre-punch paper and is currently in a punch punching mode, the “auto cassette change switch to different paper type” set in the operation unit 123 is not checked, and the paper is fed. The operation is stopped and a message indicating that there is no paper is displayed on the operation unit 123.
[0093]
In this way, for example, when the paper runs out of paper during image formation using a certain type of paper of a certain size (in this example, A4 size plain paper) (or image formation). When there is no paper of that type at the start, the type is different from the above paper, but if there is a candidate for a substitute paper of the same size, the type of the candidate paper ( In this example, A4 size pre-punch paper) and the output mode is switched by “auto cassette change switch to different paper type” according to the operation mode (in this example, punch processing mode) set by the user on the operation unit. Regardless of whether or not a processing instruction is set, control is performed so as to prohibit the paper substitute output processing as described above.
[0094]
In the above-described example, the example in which the selection of the pre-punch paper is prohibited in the case where the punching processing mode is set has been described. However, the present invention is not limited to this. For example, the staple mode is the user operation mode. Control is performed to prohibit the selective use of pre-punch paper, even when set by.
[0095]
On the other hand, with regard to the priority order for each preset paper type, for example, when the paper type to be used with the highest priority is “pre-punch paper”, paper processing is performed in advance. Therefore, it is prohibited to perform paper processing such as stapling or punching, and the function buttons on the operation screen are shaded to disable the user from selecting the mode. The present embodiment can also be applied to a configuration that is in a state.
[0096]
As described above, according to the second embodiment of the present invention, the reader unit 1 that scans a document and converts it into image data, the printer unit 2 that performs printing on a sheet based on the image data, and the sheet In an image forming apparatus including at least a plurality of paper supply ports 214, 215, 225, and 226 for storing and feeding, and a finishing device (stapling device, punch punching device) that performs post-processing on a sheet on which printing has been completed. A document size detection sensor 127 that detects the document size, an operation unit 123 that sets the type of paper in the paper feed port and the type of finishing performed by the finishing device, and the document size and operation unit detected by the document size detection sensor 127 A CPU circuit 122 that selects a paper feed port that can feed paper from a plurality of paper feed ports based on the paper type and finishing type set in 123. Therefore, as in the first embodiment, by setting the paper type, the user can select the paper automatically or change the automatic paper feed port when the paper runs out. This makes it possible to feed the paper according to the request. Further, it is possible to solve the problem that the automatic paper selection must be reset for each mode by the copy mode, and it is possible to copy by automatic paper selection without worrying about the copy mode.
[0097]
[Third Embodiment]
In the first and second embodiments described above, the paper feed port is selected according to the priority order of the paper type set by the user. Instead of this priority order, a specific paper feed port is selected. Also good. That is, a paper feed port for feeding plain paper and a paper feed port for feeding recycled paper are determined in advance as group 1, and a paper feed port for feeding colored paper and a paper feed port for feeding thick paper are determined as group 2 in advance. Keep it.
[0098]
When the user sets a mode (automatic paper selection 1) in which any of plain paper, recycled paper, colored paper, and thick paper can be selected from the operation unit 123, each paper feed included in group 1 and group 2 is selected. When the user sets the mode for selecting only the plain paper and the recycled paper (automatic paper selection 2) from the operation unit 123 by setting the paper feed port to be fed from the mouth as the paper feed selection target, the group 1 The paper feed port to be fed may be set as the paper feed selection target among the paper feed ports included in the.
[0099]
In this case, OHP paper, letterhead paper, second original paper, punch paper, and label paper are selected as the paper type of the selection prohibition conditions described in the first and second embodiments, and the paper feeding port is automatically selected. These paper types are not selected.
[0100]
The image forming apparatus according to the third embodiment of the present invention is the same as that of the first embodiment in terms of hardware configuration, and a description thereof will be omitted.
[0101]
Flow charts of the paper feed port selection process according to the third embodiment are shown in FIGS. Steps S1401 to S1408 are the same as those in the first and second embodiments, and a description thereof will be omitted. Based on the paper type acquired in step S1408,ChoiceIt is determined whether the paper type of the target paper feed port is OHP paper, letterhead paper, second original drawing paper, punch paper, or label paper (step S1409). When the determination result is affirmative, this paper feed port is excluded from the selection target (step S1411). When the determination is negative, any of plain paper, recycled paper, colored paper, and cardboard can be selected ( It is determined whether automatic paper selection 1) is set (step S1430).
[0102]
If a negative determination is made in step S1430, that is, the mode for selecting only plain paper and recycled paper (automatic paper selection 2) is set, whether the paper type of the selection target paper feed port is colored paper or thick paper Is determined (step S1431). If a negative determination is made in step S1431, that is, if the paper type of the target paper feed port is plain paper or recycled paper, this paper feed port is selected (step S1410).
[0103]
If the determination in step S1430 is affirmative, that is, if a mode in which any of plain paper, recycled paper, colored paper, and thick paper can be selected (automatic paper selection 1) is set, the process proceeds to step S1410. The paper mouth is selected. If the determination in step S1431 is affirmative, that is, if the paper type of the target paper supply port is colored paper or thick paper, the process advances to step S1411 to exclude the paper supply port from being selected.
[0104]
If the above processing is performed for all target paper feed ports (step S1412) and there is no selectable paper feed port (step S1413), the same message display as in the first and second embodiments is displayed on the operation unit 123. This is performed (step S1426). If it is determined in step S1413 that there is a selectable sheet feeding port, the sheet feeding port closest to the image forming unit among the selection target sheet feeding ports, that is, the topmost sheet feeding port among the selection target sheet feeding ports. By selecting a paper slot (step S1420) and feeding paper from the paper feed slot, a copy operation (image forming operation) is started (step S1421). Since the processing after step S1421 is the same as that of the second embodiment, the description thereof is omitted.
[0105]
[Other embodiments]
In the first to third embodiments of the present invention described above, plain paper, recycled paper, and colored paper have been described as the paper type, but the present invention is not limited to this example.
[0106]
Further, in the above-described second embodiment of the present invention, it has been described that the pre-punch paper is not selected in the case of finishing for punch punching. However, the present invention is not limited to this example. In the case of performing the above, it is not selected even in the case of OHP paper or second original drawing paper that causes a problem. The type of paper that causes a problem when finishing is not selected.
[0107]
In the first to third embodiments of the present invention described above, the printing method of the image forming apparatus is an electrophotographic method. However, the present invention is not limited to this example, and other methods such as an ink jet method may be used. The printing method may be used.
[0108]
In the first to third embodiments of the present invention described above, the case of a single image forming apparatus has been described as an example. However, the present invention is not limited to this example. You may apply to the system which connected the processing apparatus etc.
[0109]
The present invention may be applied to a system composed of a plurality of devices or an apparatus composed of a single device. A storage medium storing software program codes for realizing the functions of the above-described embodiments is supplied to a system or apparatus, and a computer (or CPU or MPU) of the system or apparatus reads the program codes stored in the storage medium. Needless to say, it can also be achieved through implementation.
[0110]
In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the storage medium storing the program code constitutes the present invention. As a storage medium for supplying the program code, for example, floppy (registered trademark) disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD-R, magnetic tape, nonvolatile memory card, ROM, or download Etc. can be used.
[0111]
Further, by executing the program code read out by the computer, not only the functions of the above-described embodiments are realized, but also the OS running on the computer based on the instruction of the program code performs the actual processing. Needless to say, a case where the function of the above-described embodiment is realized by performing part or all of the processing is included.
[0112]
Further, after the program code read from the storage medium is written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function expansion is performed based on the instruction of the program code. It goes without saying that the CPU or the like provided in the board or the function expansion unit performs part or all of the actual processing and the functions of the above-described embodiments are realized by the processing.
[0113]
Further, for example, the operation screens shown in FIGS. 5 (1) to (4) are displayed on the CRT of the host computer on the network, and the user on the host side can select, for example, each paper feed port via the operation screen. Can be used to input various types of instructions such as whether to specify different paper types, whether to perform auto cassette change to different paper types, and so on. Are transmitted to the image forming apparatus side via the network, and the image forming apparatus which receives the instruction data performs various settings based on the instruction data from the host side, and The optimum paper feed selection processing may be performed by the same method as in the first to third embodiments, and the image data output from the host computer may be formed on the paper.
[0114]
【The invention's effect】
  As described above, according to the present invention, when the paper type is automatically selected or the automatic paper feed port is changed when the paper runs out, the user desires more than the conventional function. Therefore, it is possible to perform paper feeding along the line. Further, it is possible to solve the problem that the automatic paper selection must be reset for each mode by the copy mode, and it is possible to copy by automatic paper selection without worrying about the copy mode.
  Specifically, specifically, the paper feed port for feeding plain paper and the paper feed port for feeding recycled paper are assigned to the group 1 in advance, and the paper feed port for feeding colored paper and the paper feed port for feeding thick paper are When the user sets a mode in which any of plain paper, recycled paper, colored paper, and thick paper can be selected in advance, it is determined from among the paper feeding ports included in group 1 and group 2. When the paper feed port to be fed is set as the paper feed selection target and the user sets the mode to select only plain paper or recycled paper, the paper feed target included in each paper feed port included in group 1 is selected. It becomes possible to set a paper feed port as a paper feed selection target.
  That is, according to the present invention, either the first mode or the second plurality of sheet types in which image formation is performed using a sheet of any one of the first plurality of sheet types according to a user instruction. A setting unit that sets a second mode for executing image formation using the paper of the paper type, and a paper size and a paper type set for the plurality of paper feeding units from among the plurality of paper feeding units. A selection unit configured to select a sheet feeding unit including a sheet of the detected sheet size, the sheet feeding unit including a sheet of any one of the plurality of sheet types corresponding to the set mode; Therefore, if the user sets a plurality of paper type modes, there is an effect that a paper feeding unit having an appropriate paper size and paper type is selected.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a signal processing configuration of a reader unit of an image forming apparatus according to a first embodiment of the present invention.
FIG. 2 is a configuration diagram showing an overall configuration of the image forming apparatus according to the first embodiment of the present invention.
FIG. 3 is a block diagram showing a configuration centering on a CPU circuit portion of the image forming apparatus according to the first embodiment of the present invention;
FIG. 4 is a front view illustrating a configuration of an operation unit of the image forming apparatus according to the first exemplary embodiment of the present invention.
FIG. 5 is an explanatory diagram illustrating setting of a paper type in the image forming apparatus according to the first embodiment of the present invention.
FIG. 6 is a flowchart showing a paper feed port selection process in the image forming apparatus according to the first embodiment of the present invention.
FIG. 7 is a flowchart showing a paper feed port selection process in the image forming apparatus according to the first embodiment of the present invention.
FIG. 8 is a flowchart illustrating a paper feed port selection process at the time of auto cassette change without paper in the image forming apparatus according to the first embodiment of the present invention.
FIG. 9 is a flowchart illustrating a paper feed port selection process at the time of auto cassette change without paper in the image forming apparatus according to the first embodiment of the present invention.
FIG. 10 is a flowchart showing a paper feed port selection process at the time of paperless auto cassette change in the image forming apparatus according to the first embodiment of the present invention.
FIG. 11 is a flowchart showing a paper feed port selection process at the time of punching in the image forming apparatus according to the second embodiment of the present invention.
FIG. 12 is a flowchart showing a paper feed port selection process at the time of punching in the image forming apparatus according to the second embodiment of the present invention.
FIG. 13 is a flowchart showing a paper feed port selection process at the time of punching in the image forming apparatus according to the second embodiment of the present invention.
FIG. 14 is a flowchart illustrating a paper feed port selection process in an image forming apparatus according to a third embodiment of the present invention.
FIG. 15 is a flowchart showing a paper feed port selection process in an image forming apparatus according to a third embodiment of the present invention.
FIG. 16 is a flowchart illustrating a sheet feeding port selection process in the image forming apparatus according to the third embodiment of the present invention.
FIG. 17 is an explanatory diagram showing a configuration example of storage contents of a storage medium storing a program and related data according to the present invention.
FIG. 18 is an explanatory diagram showing a conceptual example in which a program and related data of the present invention are supplied from a storage medium to an apparatus.
[Explanation of symbols]
1 Reader section
2 Printer section
122 CPU circuit
123 Operation unit
126 RAM
127 Document size detection sensor
214, 215, 225, 226 Transfer paper stacking section
250 punch unit

Claims (9)

A plurality of paper feeding means;
An image forming unit that executes image formation using a sheet of any one of the plurality of sheet feeding units;
Detection means for detecting the paper size of the document;
A first mode in which image formation is performed using a sheet of any one of the first plurality of sheet types according to a user instruction, or a sheet of any one of the second plurality of sheet types. Setting means for setting a second mode for executing image formation using
Among the plurality of sheet feeding units, the sheet feeding unit includes a sheet having a sheet size detected by the detecting unit based on a sheet size and a sheet type set in the plurality of sheet feeding units. A selection unit that selects a sheet feeding unit including a sheet of any one of a plurality of sheet types corresponding to the mode set by the setting unit;
An image forming apparatus comprising: a control unit that controls the image forming unit to perform image formation using a sheet of a sheet feeding unit selected by the selection unit. It further has an input means for reading an original and inputting image data,
The image forming means executes image formation based on the image data;
The image forming apparatus according to claim 1, wherein the selection unit selects a sheet feeding unit including a sheet having the same sheet size as the document.   The selection unit may include the plurality of sheet feeding units, when there are a plurality of sheet feeding units including a sheet of any one of the plurality of sheet types corresponding to the mode set by the setting unit. 3. The image forming apparatus according to claim 1, wherein a sheet feeding unit that is present at a position closest to the image forming unit is selected.   4. The image forming apparatus according to claim 1, wherein the first plurality of paper types and the second plurality of paper types include plain paper. 5.   5. The image forming apparatus according to claim 1, wherein the first plurality of paper types and the second plurality of paper types include recycled paper. 6. The first plurality of paper types includes colored paper;
The image forming apparatus according to claim 1, wherein the second plurality of paper types does not include colored paper. The first plurality of paper types includes cardboard,
The image forming apparatus according to claim 1, wherein the second plurality of paper types do not include cardboard. A control method for an image forming apparatus, comprising: a plurality of sheet feeding units; and an image forming unit that executes image formation using a sheet of any one of the plurality of sheet feeding units.
A detection process for detecting the paper size of the document;
A first mode in which image formation is performed using a sheet of any one of the first plurality of sheet types according to a user instruction, or a sheet of any one of the second plurality of sheet types. A setting step for setting a second mode for executing image formation using
Among the plurality of sheet feeding units, a sheet feeding unit including a sheet having a sheet size detected by the detecting step based on a sheet size and a sheet type set in the plurality of sheet feeding units , A selection step of selecting a paper feed unit that includes a paper of any one of a plurality of paper types corresponding to the mode set by the setting step;
And a control step of controlling the image forming unit to perform image formation using the paper of the paper feeding unit selected in the selection step. A computer that controls an image forming apparatus that includes a plurality of sheet feeding units and an image forming unit that performs image formation using a sheet of any one of the plurality of sheet feeding units;
A detection process for detecting the paper size of the document;
A first mode in which image formation is performed using a sheet of any one of the first plurality of sheet types according to a user instruction, or a sheet of any one of the second plurality of sheet types. A setting step for setting a second mode for executing image formation using
Among the plurality of sheet feeding units, a sheet feeding unit including a sheet having a sheet size detected by the detecting step based on a sheet size and a sheet type set in the plurality of sheet feeding units , A selection step of selecting a paper feed unit that includes a paper of any one of a plurality of paper types corresponding to the mode set by the setting step;
A computer-readable storage medium storing a program for causing the image forming unit to execute a control step of controlling the image forming unit to perform image formation using a sheet of the paper feeding unit selected in the selection step.

Images