JP2002268300A - Automatic selecting device of recording sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic selecting device of a recording sheet capable of automatically selecting the recording sheet to which a document picture has to be outputted based on the result of surely recognizing the size of the document by a user's simple operation even in the case of a document of an irregular size. SOLUTION: The automatic selecting device of the recording sheet is provided with a size discriminating table in which multiple pieces of size information in the main scanning direction and the sub-scanning direction of the document are registered and the size of the recording sheet to which the document picture has to be outputted is registered and constituted so as to select the recording sheet corresponding to a document size based on this size discrimination table. The user him/herself can add and register the size of the recording sheet to which size information concerning the main scanning direction and the sub scanning direction and the document picture have to be outputted to the size discrimination table concerning the a document size which is not registered to the size discrimination table.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as an electrophotographic copying machine for automatically determining the size of a recording sheet on which a recording image is to be formed from the size of a document set on an image input unit. The present invention relates to an automatic recording sheet selection apparatus, and more particularly to an improvement for improving user convenience when using a non-standard size original or the like.

[0002]

2. Description of the Related Art In an image forming apparatus such as an electrophotographic copying machine or a facsimile, an image input unit such as an image scanner reads a recording sheet having a size corresponding to a document size. Many devices are equipped with a device that automatically determines the size of a document and automatically selects the size of a recording sheet on which a document image is to be output based on the determination result, that is, a device for automatically selecting a recording sheet. In a copier equipped with such an automatic recording sheet selection device, even if the copying machine has a plurality of paper feed trays on which recording sheets of various sizes are set, if the document size is detected, The paper feed tray storing the recording sheet corresponding to the detected size is automatically selected, and the copying operation is performed by feeding the recording sheet from the paper feed tray.

There are various methods for detecting the size of a document in the image input unit, such as a method of detecting a document set on a platen with a plurality of sensors arranged below the platen. Copiers and facsimile machines equipped with an automatic document feeder (hereinafter, referred to as “ADF”) in a copy unit have become widespread, and a method of detecting a document size when a document is supplied by the ADF is also used. Specifically, a size sensor is provided facing the document transport path of the ADF, and a change in an output signal of the sensor generated when a document fed to the platen crosses the size sensor is used. The document size is detected. A plurality of such size sensors are provided along a direction orthogonal to the document conveyance direction (hereinafter, this direction is referred to as a “main scanning direction”). The length of is detected.
On the other hand, the length of the original in the conveying direction (hereinafter, this direction is referred to as “sub-scanning direction”) is detected from the count value by counting the length of the ON time of the size sensor.

FIG. 10 shows a size determination table when two size sensors are arranged along the main scanning direction. This size table is created in advance and stored in the memory of the control unit of the copying machine. By applying the lengths of the document detected by the size sensor in the main scanning direction and the sub-scanning direction to the size determination table, The size of the document fed to the platen can be derived. For example, if the two size sensors are both turned on in accordance with the feeding of the document, the corresponding document size is A3S based on the length of the document in the main scanning direction.
Only the EF and the A4LEF are used, and it is possible to determine which original size is based on the length of the ON time of the size sensor. In FIG. 10, SEF indicates so-called vertical feeding in which the longitudinal direction of the document matches the sub-scanning direction, and LEF indicates so-called horizontal feeding in which the short direction of the document matches the sub-scanning direction. The reason why the sub-scanning length has a width in each size is to take account of a time difference caused by a variation in the document conveyance speed, a shift in the set position on the document tray, and the like.

[0005]

However, when the copying machine or the like is shipped to the market, only the fixed size document can be registered in advance in the size discrimination table. The document size can be detected using only the standard size document, and it is impossible to recognize the document size of the non-standard size document. That is, when the main scanning length and the sub-scanning length detected by using the size sensor correspond to a blank portion other than the portion where the standard size is shown in FIG. 10, the original size cannot be recognized. . For this reason, when copying a document of a size other than the standard size, the recording sheet set in the paper feed tray cannot be automatically selected, and the user specifies the size of the recording sheet to be copied each time. Work that must be done.

[0006] Since there are many commonly used slips of a size other than the standard size, in the daily work of the user, there are many copying operations for the non-standard size document, and the non-standard size document is automatically recognized, and such a document is automatically recognized. There is a great need in the market for automatically selecting a recording sheet on which an image is copied. For this reason, conventionally, an irregular size document frequently used for each user is checked in advance, and a service engineer individually handles each user to recreate the size determination table. However, it required a great deal of labor and time.

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and an object of the present invention is to surely recognize the size of an original of a non-standard size by a simple operation by a user. It is an object of the present invention to provide an automatic recording sheet selection apparatus capable of automatically selecting a recording sheet to output a document image based on the recognition result.

[0008]

In order to achieve the above object, an automatic recording sheet selection apparatus according to the present invention is provided in which size information of a plurality of different size originals in a main scanning direction and a sub scanning direction is registered in advance. A size discrimination table in which a recording sheet size to output the document image is registered,
A first size detecting unit for obtaining size information of the document set in the image input unit in the main scanning direction, a second size detecting unit for obtaining size information of the document in the sub-scanning direction, Discrimination selection means for reading the corresponding document size from the size discrimination table based on the size information obtained from the second size detection means and notifying the image output unit of the recording sheet size corresponding to the read document size; Input registration means for additionally registering, in the size discrimination table, the size information in the main scanning direction and the sub-scanning direction regarding the document size not registered in the size discrimination table, and the recording sheet size for outputting the document image. It is characterized by having.

The present invention also provides an image forming apparatus equipped with such an automatic recording sheet selecting apparatus. That is, the image forming apparatus of the present invention includes: an image input unit that reads a set document image; an image output unit that forms a recording image on a recording sheet based on the document image read by the image input unit; According to another aspect of the present invention, there is provided the automatic recording sheet selection device for selecting a recording sheet to be selected by the image output unit based on a document size set in an image input unit.

According to such technical means, the user can use the above-mentioned input registration means to obtain the size information in the main scanning direction and the sub-scanning direction for the non-standard size document not yet registered in the size discrimination table. Can be additionally registered in the size discrimination table, and the recording sheet size for outputting the document image of the non-standard size document can also be additionally registered in the size discrimination table. By additionally registering in this manner, it is possible to automatically recognize the size of the document and automatically select a recording sheet to which the document is to be output. Therefore, each time a document of an irregular size is set in the image input unit, the user does not have to manually select a recording sheet size for outputting the document.

Here, the size information additionally registered in the size discrimination table is based on the fact that there is a variation in the conveyance speed of the recording sheet in the ADF and a variation in the setting position of the original on the original tray. As shown in FIG. 10, it is preferable that the size sensor has a width including a detection error range and can be registered in the size determination table.

If the size information additionally registered in the size discrimination table partially overlaps, for example, the size information of an already registered standard size document, the user may frequently use the additionally registered document size. From the viewpoint of respecting the intention of the user, it is preferable that the discrimination / selection unit reads out the document size from the size discrimination table by giving priority to the additional registration information.

Further, in the present invention, the size information of the non-standard size document is additionally registered in the size discrimination table so that the document size is automatically recognized, and the document image is automatically selected. Although it is also possible to output to a recording sheet of the same size, if the recording sheet of the selected fixed size is larger than the original size, the original image is output at the same magnification, and an AD around the original image is output.
As a result, unnecessary image information such as the document transport belt of F is output. Therefore, from the viewpoint of improving the appearance of the output image, when the selected recording sheet size is different from the document size, the enlargement / reduction ratio of the document image is automatically determined from both sizes. Is preferred. With this configuration, it is possible to output a document image on a recording sheet with a good appearance without recording unnecessary image information around the document image.

From a similar viewpoint, when the selected recording sheet size is larger than the document size, information in an area other than the document image can be erased without recording it on the recording sheet. .

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an automatic recording sheet selecting apparatus according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows an example of a digital color copier equipped with the automatic recording sheet selecting apparatus of the present invention. This copier is
An image input unit 1 for optically reading image information of a document 11 placed on a platen glass 10 and converting the image information into electrical image data by a CCD sensor 12;
And an image output unit 2 for forming an image on a recording sheet P based on the image data transferred from the printer. The image input unit 1 automatically feeds a document 11 to a platen glass 10. Automatic Document Feeder (ADF) 13
Contains.

The image output unit 2 forms a toner image on the photosensitive drum 20 based on the image data transferred from the image input unit 1, and then primary-transfers the toner image to an endless transfer belt 3. Further, a recording image is formed on the recording sheet P by secondary-transferring the toner image on the transfer belt 3 onto the recording sheet P. The recording sheet P on which the toner image has been secondary-transferred passes through the fixing device 4. The paper is discharged onto the discharge tray 50.

The photosensitive drum 20 is rotated in a direction indicated by an arrow at a predetermined process speed, and the surface of the photosensitive drum 20 is uniformly charged to a predetermined background potential around the photosensitive drum 20. A charging corotron 21, a laser beam scanner 22 that exposes the photosensitive drum 20 with a laser beam modulated based on image data and forms an electrostatic latent image on the photosensitive drum 20, and black, yellow, magenta, and cyan And a rotary developing unit 23 for developing an electrostatic latent image on the photosensitive drum by any one of the developing units, and a developing unit 23 on the photosensitive drum 20 prior to the primary transfer of the toner image to the transfer belt 3. A pre-transfer treatment corotron 24 for removing potential and a cleaner 25 for removing residual toner on the photosensitive drum 20 after the primary transfer of the toner image is disposed. That.

On the other hand, the transfer belt 3 is wound around a plurality of rolls and rotates in the direction of the arrow,
The toner images of each color sequentially formed on the transfer belt 3
After the multiple transfer to the recording sheet P, the secondary transfer is collectively performed from the transfer belt 3 to the recording sheet P. At a position facing the photosensitive drum 20 with the transfer belt 3 interposed therebetween, a primary transfer roll 30 for forming a transfer electric field between the photosensitive drum 20 and the primary transfer roll 30 is provided. Is the secondary transfer roll 31 and the counter electrode roll 3
The recording sheet P is inserted between the secondary transfer roll 31 and the transfer belt 3 to receive the transfer of the toner image. A belt cleaner 33 that removes paper dust and residual toner from the surface of the transfer belt 3 after the secondary transfer is provided between the secondary transfer position and the primary transfer position in the rotation path of the transfer belt 3. Is provided.

Below the image output unit 2, four-stage sheet feed cassettes 5a to 5d containing recording sheets P of different sizes are provided, and the size of the originals detected by the image input unit 1 is reduced. Recording sheet P of appropriate size according to
Are fed from one of the sheet feeding cassettes to the image output unit 2 by the rotation of the feed roller 51. A plurality of sheet transport rolls 52 are provided on the transport path of the recording sheet P from each of the sheet feeding cassettes 5a to 5d to the secondary transfer position of the toner image, and registration is performed immediately before the secondary transfer position. A roll 53 is provided, and the registration roll 53 transfers the recording sheet P sent from the sheet feeding cassettes 5a to 5d at a predetermined timing synchronized with a timing of writing an electrostatic latent image on the photosensitive drum 20. Send to the next transfer position.

In FIG. 1, reference numeral 26 designates an image processing unit which processes the image data transferred from the image input unit 1 to the image output unit 2 in accordance with the content of the copying operation and supplies the processed image data to the laser beam scanner 22. , Reference numeral 54 denotes a manual feed tray used for manual feeding of the recording sheet P, reference numeral 55 denotes a sheet conveying belt for feeding the recording sheet P on which the toner image has been secondarily transferred to the fixing device 4, and reference numeral 56 denotes a recording sheet. P
This is an inverter path for inverting the recording sheet P and feeding it from the fixing device 4 to the secondary transfer position at the time of double-sided copying.

In the color copying machine of the present embodiment constructed as described above, the laser beam scanner 22 exposes the photosensitive drum 20 based on the image information of the original taken in by the image input unit 1, and the photosensitive drum 20 is exposed first. An electrostatic latent image corresponding to black is written on the body drum 20. on the other hand,
In the rotary developing unit 23, a developing device for black toner is set at a position facing the photosensitive drum 20, and the electrostatic latent image is developed by the black developing device with a slight delay from its writing timing. Then, the black toner image thus formed is transferred to the primary transfer roll 3.
0, the image is primarily transferred onto the transfer belt 3, and the transfer belt 3 rotates while carrying the toner image. When the developing process by the black developing device is completed, the transfer belt 3
The developing device is replaced before the rotation cycle is completed, and the developing device for yellow toner is set at a position facing the photosensitive drum 20 by rotating the rotary developing unit 23 by 90 °.

Thereafter, these operations are repeated every rotation cycle of the transfer belt 8, and each time, the yellow, magenta and cyan toner images are transferred from the photosensitive drum 20 to the transfer belt 3. , A superimposed toner image of four color toner images is formed. The full-color multi-transferred toner image thus formed is secondarily transferred to the recording sheet P sent from the registration roll 53 at a predetermined timing, and the unfixed toner image is transferred to the recording sheet P. The sheet is discharged to the discharge tray 50 via the fixing device 4.

Next, the configuration of the image input unit will be described. As described above, the image input unit 1 causes the reflected light of the document 11 set on the platen glass 10 to be incident on the solid-state imaging device such as the CCD sensor 12, thereby converting the image information of the document 11 into an electric signal. Is configured. Below the platen glass 10, the platen glass 1
A lamp for illuminating the original 11 through the reference numeral 0, a plurality of reflection mirrors and lenses for guiding reflected light of the original obtained as a result of the illumination to the CCD sensor 12 and forming an image are provided. Illumination lamp and some mirrors are platen glass 1
The carriage 11 is mounted on a carriage that can move along the axis 0, and the carriage moves so that the original 11 that is stationary on the platen glass 10 can be scanned.

FIG. 2 shows the structure of the ADF 13 provided on the platen glass 10. The ADF 13 is provided so as to cover the platen glass.
When the copying operation is performed without using the F, the original can be opened and closed to manually replace the original on the platen glass.

In FIG. 2, reference numeral 60 denotes an original tray on which a bundle of a plurality of originals is set, and reference numeral 61 denotes an original tray 6.
A pick-up roll 62 abuts on the original 11 stacked on the top 0 and draws the original 11 into the paper feed path R1 inside the ADF 13. Reference numeral 62 denotes a separation of the original 11 drawn by the pickup roll 61 into individual sheets. Reference numeral 63 denotes a feed roll for feeding, and reference numeral 63 denotes a retard roll which is disposed opposite to the feed roll 62 to prevent double feeding of the document 11, and reference numeral 64 denotes a document which is temporarily fed from the document tray 60. A registration roll that locks and feeds the original 11 on the platen glass 10 at a predetermined timing. Reference numeral 65 denotes a platen belt that conveys the original 11 on the platen glass 10. Reference numeral 66 denotes a platen belt 65 that is removed from the platen glass 10 by the platen belt 65. An exit roll for sending the document 11 onto the document discharge tray 67.

A registration sensor 71 for detecting whether or not the document 11 has reached the registration roll 64 is provided immediately before the registration roll 64.
An exit sensor 72 for detecting whether or not the sheet has been discharged to the document discharge tray 67 is provided. Each of the rolls and the platen belt 65 described above are driven at a predetermined timing synchronized with the detection signals of these sensors. Has become.

Further, the ADF 13 also has an automatic reversing mechanism for the original 11 corresponding to double-sided copying. , Manuscript 11
Is inverted and can be sent onto the platen glass 10. A transport roll 68 is provided in the reversing path R2, and the original 11 is
An inverter sensor 69 for confirming that the vehicle has passed through the inside 2 is provided.

In FIG. 2, reference numeral 75 denotes the original 11
A gate plate for smoothly sending the original 11 drawn on the platen glass 10 to the reversing route R2 while smoothly feeding the original 11 from the transport path R1 onto the platen glass 10, and a lamp 76 and a mirror 76 for illuminating the original 11 Is a carriage on which is mounted.

FIG. 3 is a plan view showing the relationship between the original 11 and the registration roller 64 and the registration sensor 71. Two size sensors S1 and S2 are provided on the near side of the registration roll 64 in the document transport path R1 so as to be aligned with the registration sensor 71 in the main scanning direction. These size sensors S1 and S2 are arranged at a predetermined interval from each other, and when the original 11 is transported with reference to the registration position in the main scanning direction shown in FIG. A state in which both size sensors S1 and S2 are off in accordance with X, a state in which only size sensor S1 is on,
3 in a state where both size sensors S1 and S2 are both turned on
There are different types of signal combinations. Therefore, by checking the output signals of the size sensors S1 and S2, it is possible to classify fixed size originals of A3 size or smaller into three types by the length X in the main scanning direction.

The registration roll 64 temporarily locks the original 11 drawn from the original tray 60, and
The skew occurring in the register roll 6 is corrected.
By counting the time from the restart of rotation of the document 4 to the time when the rear end of the document 11 passes through the front of the registration sensor 71, that is, the time from when the output signal of the registration sensor 71 changes from on to off, the arrangement position of the registration sensor 71 is determined. From the document 11 to the rear end of the document 11 are detected. And cash register roll 64
By adding the offset amount L of the registration sensor 71 to Y, the length of the document 11 in the sub-scanning direction can be detected.

In the image input section of this embodiment, while the original 11 is being fed to the platen 10,
1 and the output signals of the size sensors S1 and S2, the size information of the document 11 in the main scanning direction and the sub-scanning direction can be obtained, and the obtained size information is stored in the size determination table shown in FIG. By applying, the size of the document can be recognized. Then, based on the recognition result, the recording sheet P of the corresponding size is sent out from any of the sheet feeding cassettes 5a to 5d to the image output unit 2 by the rotation of the feed roller 51.

However, since only the size information of the standard size document 11 is registered in the size determination table of FIG. 10, if the non-standard size document is fed by the ADF 13, the size determination is performed. It becomes impossible to recognize the document size using the table, and it becomes impossible to automatically select the recording sheet P from which the document image is to be output.

Therefore, the copying machine of this embodiment is configured so that the user himself can additionally register the size information of the frequently used irregular size document in the size discrimination table. Can be remade according to the taste of Additional registration of new document size information is performed by the user himself / herself via the console panel 90 provided in the copying machine. 4 and 5 show the console panel 90 when performing the additional registration work. As shown in FIG. 4, a start menu of a document size registration mode can be displayed on the liquid crystal touch panel 91 in the console panel 90. When the displayed button is touched, the document size registration mode is started. The screen is switched to the contents shown in FIG. FIG. 5 shows a display on the touch panel 91 in the document size registration mode.

In this document size registration mode, additional registration processing of a new document size is performed according to the flowchart shown in FIG. When the document size registration mode is started, first, the display on the touch panel is switched as shown in FIG. 5, and it becomes possible to input the size information of the input document desired to be registered and the recording sheet size for outputting the document.
The user operates the console panel 9 in the display state of FIG.
Size information can be input using the numeric keypad within 0. The size information of the input document is input by designating the length in each of the main scanning direction and the sub-scanning direction. The output recording sheet size is a fixed-size recording sheet P stored in the sheet feeding cassettes 5a to 5d.
You will need to select from and enter. Then, when the user who has completed the input touches the registration button on touch panel 91, the input registration condition is checked. In this registration condition check, it is determined whether or not the input document length in the main scanning direction can be determined by the size sensors S1 and S2. That is, the input document length in the main scanning direction is changed from the registration position in the main scanning direction to the size sensor S.
When the distance between the size sensors S1 and S2 is extremely close to the distance between the size sensors S1 and S2, the output signals of the size sensors S1 and S2 become unstable. , Additional registration of document size is prohibited. Therefore, in the registration condition check, it is checked whether the input size information in the main scanning direction is not such, and if the size information cannot be registered, a warning to that effect is displayed on the touch panel 91.

If it is determined that the input document size information can be additionally registered, the size information is additionally registered in the size determination table, and the registration data in the size determination table is corrected. . This allows
The size determination table shown in FIG. 10 is rewritten as shown in FIG. In the size determination table of FIG. 7, an irregular size having a shorter length in the sub-scanning direction than B4SEF is additionally registered. At this time, the size information of the additionally registered document in the sub-scanning direction is set to a width of about 5 mm around the input value in consideration of the detection error of the length in the sub-scanning direction caused by a variation in the conveyance speed of the document. Is registered as a value having

After the size information of the non-standard size document frequently used by the user is additionally registered in the size discrimination table in this way, the non-standard size document is copied in the same manner as when copying the standard size document. Copying can be performed on a fixed-size document while using the automatic recording sheet selection function. That is, when the non-standard size document 11 whose size information is registered as described above is set on the document tray 60 of the ADF 13 and the copy start button is pressed, the document 11 is fed to the platen 10 and the size sensors S1, S2 While the length of the document 11 in the main scanning direction is detected by the combination of the output signals, the length of the document 11 in the sub-scanning direction is detected from the ON time of the registration sensor 71. Then, the size information in the main scanning direction and the sub-scanning direction detected in this way is compared with the size information stored in the size determination table shown in FIG. In this case, the size information of the non-standard size document that is being copied has already been additionally registered in the size determination table.
Since the recording sheet size for outputting a document image of this size is also registered, the recording sheet size to be fed to the image output unit 2 in the copying operation is automatically selected by referring to the size determination table. It is possible to do.

As a result, it is not necessary to specify the recording sheet size of the copy destination each time the original is copied, as long as the size information of the frequently used non-standard size original is additionally registered. As long as the document is set on the document tray of the ADF, a series of copying operations can be automatically performed.

If the size information of the non-standard size document and the recording sheet size of the output destination are additionally registered in the size discrimination table, the control unit of the copying machine can control both the document size and the output destination recording sheet size. Therefore, it is possible to perform the copying operation by enlarging or reducing the original image so that the platen belt 65 and the like are not copied onto the recording sheet P. That is, since recent copiers have a function of automatically enlarging or reducing the size of a document image to match the size of a recording sheet, a user performs a copying operation using a non-standard size document using the same. be able to.

Further, if both the original size and the output destination recording sheet size are known in this way, even if the original image is not enlarged or reduced, as shown in FIG. With respect to the area of the recording sheet P (hatched area in the figure), it is possible to set so that the image information is erased so that the platen belt 65 and the like are not copied when the recording image is formed in the image output unit.

On the other hand, as described above, in this embodiment, the size information in the sub-scanning direction input by the user at the time of additional registration is given a width of about 5 mm before and after the input value, and the size discrimination table is provided. In the case where the width has such a width, as shown in FIG. 9, the size information of the standard size original (B4SEF in the figure) in which the additionally registered size information is already registered, as shown in FIG. May partially overlap. In such a case, if the size determination table is used as it is, the B4SEF
When the document is fed in F, the size may be mistaken for the additionally registered non-standard size, or the non-standard document may be mistaken for B4SEF, so that an appropriate copying operation cannot be performed.

Therefore, in order to avoid such a situation,
In this embodiment, a mode for preferentially reading the additionally registered size information is provided, and when this mode is selected, before the size information of the standard size original is searched from the size determination table, the additionally registered non-registered It is configured to search for size information of a fixed size original. In the size information input screen in the document size registration mode shown in FIG. 5, there is a button displayed as "use document size registration mode", and after this button is pressed, all copying performed thereafter is performed. With regard to the work, the size information obtained from the output signals of the size sensor and the registration sensor is set to be preferentially collated with the size information additionally registered in the size determination table. Therefore, when applied to the example of FIG. 9, the non-standard size original set in the original tray is not mistakenly recognized as B4SEF, and the copying operation of the non-standard size original can be performed smoothly. is there. If it is determined that the detected size information does not match the additionally registered non-standard size, the size information of the standard size document is searched from the size determination table. Can be smoothly performed without any support.

Further, instead of such an irregular document, B4S
If the user wants to copy an EF document, the user can cancel the use of the document size registration mode on the screen of the touch panel 91 shown in FIG. 5. When the cancellation is performed, the size information additionally registered is deleted. Without using this, the document size is determined using only the size information of the registered standard size document. Accordingly, in the present embodiment, even if the size information additionally registered in the size determination table partially overlaps with the size information of the registered standard size document, the document registration mode is set in advance. By deciding whether or not to use the record sheet, it is not necessary to select a recording sheet every time a copying operation is performed.

[0043]

As described above, according to the recording sheet automatic selection apparatus of the present invention, the user himself can additionally register the size information of the non-standard size document in the size determination table. Since the recording sheet size for outputting the original image of the standard size original can also be additionally registered in the size determination table, such a user can additionally register the frequently used non-standard size original in this way.
It is possible to automatically select the recording sheet from which the document is to be output simply by setting the non-standard size document in the image input unit, and every time the document is set in the image input unit,
This eliminates the need to manually select the size of the recording sheet on which the document is to be output, and saves copying work.

[Brief description of the drawings]

FIG. 1 is a sectional view schematically showing an electrophotographic copying machine to which the present invention is applied.

FIG. 2 is a cross-sectional view schematically illustrating an ADF of an image input unit to which the present invention has been applied.

FIG. 3 is a plan view showing a positional relationship of a size sensor with respect to a document.

FIG. 4 is a plan view showing an example of a console panel of the copying machine.

FIG. 5 is a plan view showing an example in which an input screen in a document size registration mode is displayed on a touch panel in a console panel.

FIG. 6 is a flowchart showing a procedure for inputting document size information in a document size registration mode.

FIG. 7 is a diagram illustrating a size determination table in which new size information is additionally registered.

FIG. 8 is a diagram illustrating a case where a selected recording sheet size is larger than a document image area.

FIG. 9 is a diagram illustrating an example in which additionally registered size information in the sub-scanning direction partially overlaps registered size information.

FIG. 10 is a diagram illustrating a size discrimination table in which only size information of a fixed-size document is registered.

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Claims (6)

[Claims] A size discriminating table in which size information in a main scanning direction and a sub-scanning direction of a plurality of documents of different sizes is registered in advance, and a recording sheet size for outputting the document image is registered; First size detecting means for obtaining size information of the original set in the main scanning direction, second size detecting means for obtaining size information of the original in the sub-scanning direction, and the first and second sizes A discrimination selection means for reading the corresponding document size from the size discrimination table based on the size information obtained from the detection means and notifying the image output unit of a recording sheet size corresponding to the read document size. In the automatic recording sheet size selection device, regarding the document size not registered in the size determination table,
An automatic recording sheet selection apparatus, further comprising an input registration unit for additionally registering size information regarding the main scanning direction and the sub-scanning direction and a recording sheet size for outputting the document image in the size determination table. 2. The recording sheet automatic selection apparatus according to claim 1, wherein the size information has a width including a detection error range and is registered in the size determination table. 3. The recording sheet according to claim 2, wherein when the additionally registered size information overlaps with the already registered size information, the discriminating and selecting means reads out the document size by giving priority to the additional registered information. Automatic selection device. 4. An image input section for reading a set document image, an image output section for forming a recording image on a recording sheet based on the document image read by the image input section, 2. An image forming apparatus comprising: the recording sheet automatic selection device according to claim 1, wherein a recording sheet to be selected by the image output unit is selected based on the set document size. 5. A recording sheet is selected in the image output section based on the contents additionally registered in the size discrimination table, and when the selected recording sheet size is different from the document size, the sizes of the two are determined. 5. The image forming apparatus according to claim 4, wherein the enlargement / reduction ratio of the document image is automatically determined from the following. 6. A recording sheet is selected by the image output unit based on the contents additionally registered in the size discrimination table, and when the selected recording sheet size is larger than the document size, the image sheet other than the document image is selected. 5. The image forming apparatus according to claim 4, wherein the information of the area is deleted without being recorded on the recording sheet.