JP7222208B2 - Image forming device, paper feeding device and program - Google Patents

Description

The present invention relates to an image forming apparatus, a paper feeder, and a program.

2. Description of the Related Art Generally, in an image forming apparatus that forms an image on a sheet of paper, the sheet is placed on a sheet feeding tray provided inside or outside the main body of the image forming apparatus.
The tray is vertically moved by a drive motor or the like. As a basic operation of the tray, the tray on which the paper is placed rises to the upper limit and becomes ready for paper feeding. Also, the tray can be lowered so that new sheets can be supplied to the tray.

By the way, in recent years, there has been a demand to use the same tray as the standard paper to feed paper of a size (long paper) that is longer than the size of paper (standard paper) that is assumed to be used in advance. There is
However, when long sheets are stacked on the tray, depending on the number of stacked sheets, the performance of the provided motor may be exceeded, and the tray may not be lifted. In order to avoid this, it is conceivable to increase the power of the motor, but this will increase the cost.

Therefore, in stacking such long sheets, it is being considered to set a stacking limit on the tray. For example, in Patent Document 1, a sensor is provided at the middle position in the vertical direction of the movement range of the tray, and when paper of a predetermined size or larger is placed, the tray does not fall below the middle position. Techniques for preventing overloading have been proposed.

JP 2017-100863 A

However, the technique described in Japanese Patent Application Laid-Open No. 2002-300000 assumes the condition in which the maximum load is applied to the tray, and prevents the tray from being lowered evenly for sheets of a predetermined size or larger. For this reason, even if the size is larger than the predetermined size, the stacking limit is uniformly imposed even if the stacking of the sheets to the same height as the standard sheets does not result in overload due to the basis weight or the like. In other words, judging only from the size of the paper, there is a possibility that the height at which the paper can actually be stacked differs from the stacking limit height.

SUMMARY OF THE INVENTION An object of the present invention is to provide an image forming apparatus, a paper feeding apparatus, and a program capable of appropriately restricting stacking according to the type of paper.

In order to solve the above problems, the present invention
In an image forming apparatus that feeds paper using a vertically movable paper stacking tray,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
with
The notification means is characterized in that, when the paper information acquired by the acquisition means is insufficient, the notification means notifies the user of the insufficient information.
In addition, the present invention
In an image forming apparatus that feeds paper using a vertically movable paper stacking tray,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
a measuring unit that actually measures the paper information of the paper;
with
The acquisition means acquires the paper information from the measured values measured by the actual measurement unit,
The actual measurement unit is characterized by having a thickness detection unit that detects the thickness of the paper.
In addition, the present invention
In an image forming apparatus that feeds paper using a vertically movable paper stacking tray,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
a setting unit that receives a user's setting operation for profile information related to paper;
a measuring unit that actually measures the paper information of the paper;
with
the acquisition unit acquires the paper information by prioritizing the profile information set via the setting unit over the measured value measured by the actual measurement unit;
The actual measurement unit is characterized by having a thickness detection unit that detects the thickness of the paper.
In addition, the present invention
In an image forming apparatus that feeds paper using a vertically movable paper stacking tray,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
a measuring unit that actually measures the paper information of the paper;
with
The acquisition means acquires the paper information from the measured values measured by the actual measurement unit,
The actual measurement unit includes a basis weight detection unit that detects the basis weight of the paper,
The acquisition unit multiplies the basis weight of the paper by the size of the paper to acquire the weight of the paper.
In addition, the present invention
In an image forming apparatus that feeds paper using a vertically movable paper stacking tray,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
a setting unit that receives a user's setting operation for profile information related to paper;
a measuring unit that actually measures the paper information of the paper;
with
the acquisition unit acquires the paper information by prioritizing the profile information set via the setting unit over the measured value measured by the actual measurement unit;
The actual measurement unit includes a basis weight detection unit that detects the basis weight of the paper,
The acquisition unit multiplies the basis weight of the paper by the size of the paper to acquire the weight of the paper.
In addition, the present invention
In an image forming apparatus that feeds paper using a vertically movable paper stacking tray,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
confirming means for notifying a user of a message prompting the user to confirm whether or not the maximum stacking limit value calculated by the calculating means is exceeded when the large size paper is placed on the paper stacking tray;
characterized by comprising

In addition , the present invention
In a paper feeder equipped with a paper stacking tray that can move up and down,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
a measuring unit that actually measures the paper information of the paper;
with
The acquisition means acquires the paper information from the measured values measured by the actual measurement unit,
The actual measurement unit is characterized by having a thickness detection unit that detects the thickness of the paper.
In addition, the present invention
In a paper feeder equipped with a paper stacking tray that can move up and down,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
a setting unit that receives a user's setting operation for profile information related to paper;
a measuring unit that actually measures the paper information of the paper;
with
the acquisition unit acquires the paper information by prioritizing the profile information set via the setting unit over the measured value measured by the actual measurement unit;
The actual measurement unit is characterized by having a thickness detection unit that detects the thickness of the paper.
In addition, the present invention
In a paper feeder equipped with a paper stacking tray that can move up and down,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
a measuring unit that actually measures the paper information of the paper;
with
The acquisition means acquires the paper information from the measured values measured by the actual measurement unit,
The actual measurement unit includes a basis weight detection unit that detects the basis weight of the paper,
The acquisition unit multiplies the basis weight of the paper by the size of the paper to acquire the weight of the paper.
In addition, the present invention
In a paper feeder equipped with a paper stacking tray that can move up and down,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
a setting unit that receives a user's setting operation for profile information related to paper;
a measuring unit that actually measures the paper information of the paper;
with
the acquisition unit acquires the paper information by prioritizing the profile information set via the setting unit over the measured value measured by the actual measurement unit;
The actual measurement unit includes a basis weight detection unit that detects the basis weight of the paper,
The acquisition unit multiplies the basis weight of the paper by the size of the paper to acquire the weight of the paper.
In addition, the present invention
In a paper feeder equipped with a paper stacking tray that can move up and down,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
with
The notification means is characterized in that, when the paper information acquired by the acquisition means is insufficient, the notification means notifies the user of the insufficient information.
In addition, the present invention
In a paper feeder equipped with a paper stacking tray that can move up and down,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
confirming means for notifying a user of a message prompting the user to confirm whether or not the maximum stacking limit value calculated by the calculating means is exceeded when the large size paper is placed on the paper stacking tray;
characterized by comprising

In addition , the present invention
A measuring unit that can place paper having a size larger than a predetermined size, feeds paper from a vertically movable paper loading tray, and actually measures paper information related to the paper, wherein the measuring unit measures the paper A computer of an image forming apparatus equipped with a thickness detection unit that detects the thickness of
acquisition means for acquiring the paper information;
calculation means for calculating, based on the paper information acquired by the acquisition means, a maximum stacking limit value of paper that can be loaded on the paper tray;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
function as
The obtaining means is a program for obtaining the sheet information from the measured values measured by the measuring section.
In addition, the present invention
A setting unit that can load paper of a size larger than a predetermined size, feeds paper from a paper tray that can move up and down, and accepts user setting operations for profile information related to paper, and paper related to paper a measuring unit that measures information, the measuring unit comprising a thickness detection unit that detects the thickness of a sheet of paper, the computer of the image forming apparatus,
acquisition means for acquiring the paper information;
calculation means for calculating, based on the paper information acquired by the acquisition means, a maximum stacking limit value of paper that can be loaded on the paper tray;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
function as
The acquisition unit is a program that acquires the paper information by prioritizing the profile information set via the setting unit over the measured value measured by the actual measurement unit.
In addition, the present invention
A measuring unit that can place paper having a size larger than a predetermined size, feeds paper from a vertically movable paper loading tray, and actually measures paper information related to the paper, wherein the measuring unit measures the paper A computer of an image forming apparatus equipped with a basis weight detection unit that detects the basis weight of
acquisition means for acquiring the paper information;
calculation means for calculating, based on the paper information acquired by the acquisition means, a maximum stacking limit value of paper that can be loaded on the paper tray;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
function as
The acquisition unit is a program for acquiring the paper information from the measured values measured by the actual measurement unit, multiplying the basis weight of the paper by the size of the paper, and acquiring the weight of the paper.
In addition, the present invention
A setting unit that can load paper of a size larger than a predetermined size, feeds paper from a paper tray that can move up and down, and accepts user setting operations for profile information related to paper, and paper related to paper a measurement unit that actually measures information, the measurement unit comprising a basis weight detection unit that detects the basis weight of paper, the computer of the image forming apparatus,
acquisition means for acquiring the paper information;
calculation means for calculating, based on the paper information acquired by the acquisition means, a maximum stacking limit value of paper that can be loaded on the paper tray;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
function as
The acquisition means acquires the paper information by prioritizing the profile information set via the setting unit over the measured value measured by the actual measurement unit, and assigns the paper size to the basis weight of the paper. It is a program that multiplies and obtains the weight of the paper.
In addition, the present invention
A computer of an image forming apparatus that can load paper having a size larger than a predetermined size and feed paper from a vertically movable paper loading tray,
Acquisition means for acquiring paper information about paper;
calculation means for calculating, based on the paper information acquired by the acquisition means, a maximum stacking limit value of paper that can be loaded on the paper tray;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
function as
The notification means is a program for notifying a user of the insufficient information when the sheet information acquired by the acquisition means is insufficient.
In addition, the present invention
A computer of an image forming apparatus that can load paper having a size larger than a predetermined size and feed paper from a vertically movable paper loading tray,
Acquisition means for acquiring paper information about paper;
calculation means for calculating, based on the paper information acquired by the acquisition means, a maximum stacking limit value of paper that can be loaded on the paper tray;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
Confirmation means for notifying a user of a message prompting the user to confirm whether or not the maximum stacking limit value calculated by the calculation means is exceeded when the large size paper is placed on the paper tray;
It is a program that functions as

According to the present invention, it is possible to perform appropriate stacking restrictions according to the type of paper.

1 is a schematic diagram showing the overall configuration of an image forming system; FIG. 2 is a block diagram showing the functional configuration of the image forming system; FIG. 1 is a schematic configuration diagram showing a sheet feeding device; FIG. 7 is a flowchart showing the flow of loading limit setting processing; FIG. 5 is a diagram for explaining calculation of a maximum loading limit value; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the scope of the invention is not limited to the illustrated examples.

[Configuration of Image Forming System]
First, the configuration of an image forming system 1 according to this embodiment will be described.
FIG. 1 is a schematic diagram showing the overall configuration of an image forming system 1. As shown in FIG. FIG. 2 is a block diagram showing the functional configuration of the image forming system 1. As shown in FIG.

As shown in FIGS. 1 and 2, the image forming system 1 includes an image forming apparatus 100 , a paper feed unit 200 and a paper processing unit 300 .
The image forming apparatus 100 is an apparatus that forms an image on paper. The paper feed unit 200 is a unit that supplies paper to the image forming apparatus 100 . The sheet processing unit 300 is a unit that performs predetermined sheet processing as necessary on sheets on which images have been formed by the image forming apparatus 100 . In this embodiment, the image forming system 1 includes the sheet processing unit 300, but the sheet processing unit 300 does not necessarily have to be connected.
Details of the image forming apparatus 100, the paper feed unit 200, and the paper processing unit 300 will be described below in this order.

<Image forming apparatus>
1 and 2, the image forming apparatus 100 includes, for example, a document reading section 110, a paper feeding section 120, a paper conveying section 130, an image forming section 140, a fixing section 150, a control section 160, a storage section 170, an operation A display unit 180, a communication unit 190, and the like are provided.

Document reading unit 110 optically reads a document to generate image data.
Specifically, the document reading unit 110 transports the document placed on the document tray by a transport mechanism and optically scans it, and the reflected light from the document is projected onto the light receiving surface of a CCD (Charge Coupled Device) sensor. The image is formed and the image of the document is read to generate image data.

Paper feeding unit 120 stores paper before an image is formed by image forming apparatus 100 , and sends out the stored paper to paper conveying unit 130 when the image forming process is started.
As shown in FIG. 1, the paper feeding unit 120 includes a plurality of paper feeding trays t1 to t3 installed in the lower part of the housing of the image forming apparatus 100, and can store paper of different sizes. It should be noted that paper can also be sent out to the paper conveying section 130 from the paper feed unit 200 installed as a separate body from the housing of the image forming apparatus 100 . At least two of the paper feed trays t1 to t3 of the paper feed section 120 and the paper feed trays of the paper feed unit 200 may store sheets of the same size.

The sheet conveying section 130 conveys the sheet fed from the sheet feeding section 120 or the sheet feeding unit 200 along the sheet conveying path inside the image forming apparatus 100 and transfers the sheet to the sheet processing unit 300 .
Specifically, the paper conveying unit 130 is provided at intervals along a predetermined paper conveying path defined between and around each unit such as the paper feeding unit 120, the image forming unit 140, and the fixing unit 150, for example. and a drive unit (not shown) for driving each roller. The paper conveying unit 130 conveys the paper fed one by one from the paper feeding unit 120 to the image forming unit 140 , conveys the paper on which an image is formed by the image forming unit 140 to the fixing unit 150 , and the fixing unit 150 . The paper on which the image is fixed by is conveyed so as to be discharged from a paper discharge port provided on the paper processing unit 300 side.
Further, when double-sided printing is performed, the paper conveying unit 130 turns over the paper from a branch point 131 provided on the conveying path between the fixing unit 150 and the paper ejection port, and prints the paper on the image forming unit 140 . It works to return upstream.

Image forming section 140 forms an image on a sheet of paper.
Specifically, the image forming unit 140 includes, for example, a photoreceptor 141 provided so that the outer peripheral surface contacts the paper conveyed by the paper conveying unit 130, and a charging unit that performs electrification processing on the photoreceptor 141. 142 , an exposure unit 143 that performs exposure processing according to image data on the charged photoreceptor 141 , a developing unit 144 that forms a toner image according to image data and transfers (primary transfer) onto the photoreceptor 141 , the photoreceptor 141 . A transfer unit 145 for transferring (secondary transfer) the toner image transferred onto the paper onto a sheet, a cleaning unit 146 for removing residual toner from the photoreceptor 141, and the like.
Note that the image forming unit 140 shown in FIG. 1 includes one developing unit 144 and is configured to form a monochromatic image, but this is an example and is not limited to this. The image forming unit 140 includes developing units 144 corresponding to, for example, cyan (C), magenta (M), yellow (Y), and black (K), and can perform color printing using a combination of these colors. It may be provided so that

The fixing section 150 fixes the image formed by the image forming section 140 onto the paper.
Specifically, the fixing unit 150 includes, for example, a pair of fixing rollers 151 and 151 provided so that the outer peripheral surfaces of the pair of fixing rollers 151 and 151 are in contact with each other across the paper transport path, and an image forming unit of the pair of fixing rollers 151 and 151 . A heating unit 152 and the like are provided to heat the roller on the surface side (for example, the upper side in FIG. 1) of the sheet on which the image is formed by the unit 140 . In the fixing unit 150, a pair of fixing rollers 151, 151 that are rotationally driven hold a sheet of paper, and one of the rollers heated by a heating unit 152 heats the sheet of paper on which an image has been formed. The toner image is fixed on the paper.

The control unit 160 comprehensively controls each device of the image forming system 1 and each unit included in each device according to instructions input from the operation display unit 180 or the communication unit 190 . The control unit 160 includes a CPU (Central Processing Unit), a RAM (Random Access Memory), and the like. Various processes are executed through collaboration.
For example, the control unit 160 performs image forming processing on paper by the image forming apparatus 100 based on image data acquired via the document reading unit 110 .
In addition, the control unit 160 allows the paper feeding unit 200 to extend the length of the paper (hereinafter referred to as long paper) when image formation is performed on a paper of a size larger than a paper of a predetermined size (prescribed paper). When a sheet of paper is to be accommodated, a process of setting a stacking limit for the tray of the paper feed unit 200 (loading limit setting process) is executed.

The storage unit 170 is composed of a nonvolatile semiconductor memory, HDD (Hard Disk Drive), or the like, and stores programs executed by the control unit 160 and data necessary for executing the programs. For example, the storage unit 170 stores various setting conditions related to image forming processing, various setting conditions related to stacking limit setting processing, and the like.

The operation display unit 180 displays various information related to the operation of the image forming system 1, and has a touch panel for detecting various input operations performed by the user according to the displayed contents, and a touch panel for various input operations performed by the user. a plurality of switches and the like. Note that the control unit 160 performs processing related to control of display contents on the touch panel of the operation display unit 180 . Further, the control unit 160 controls operations of the image forming system 1 based on various input operation contents performed by the user via the operation display unit 180 .

The communication unit 190 includes a network interface card (NIC) or a configuration equivalent thereto, and performs communication between the image forming system 1 and other computers. When an image forming job including image data is input via the communication unit 190, the control unit 160 performs image forming processing and the like based on the image forming job.

Note that the image forming unit 140 in the present embodiment forms an image by an electrophotographic method, but this is an example and the present invention is not limited to this. That is, the image forming section 140 may have a configuration for forming an image by another image forming method such as inkjet. When the image forming section 140 forms an image using an inkjet method, the fixing section 150 may not be provided.

<Paper feed unit>
The paper feed unit 200 is a device that supplies paper to the image forming apparatus 100 .
The sheet feeding unit 200 constitutes a sheet feeding device together with the control section 160 .
FIG. 3A is a schematic configuration diagram showing the sheet feeding unit 200. FIG. FIG. 3B is a top view of the sheet stacking tray 202 of the sheet feeding unit 200. As shown in FIG.
As shown in FIG. 3A, the paper feed unit 200 has a housing 201 for storing paper. A loading tray 202 is provided.
A handle (not shown) is attached to the front surface of the housing 201 for pulling out the paper stacking tray 202 inside. 202 can be replenished with paper.

As shown in FIGS. 3A and 3B, the sheet stacking tray 202 includes an abutment plate 203 for regulating the position of the sheets placed, side guide plates 204, 204, and a trailing edge guide. A plate 205 and a drive unit 206 for vertically moving the paper tray 202 are provided.
Specifically, openings 202a, 202b, 202b, and 202c are formed in the paper stacking tray 202, and an abutment plate 203, side guide plates 204, 204, and a rear end guide plate 205 are provided inside each opening. loosely fitted. As a result, the sheet stacking tray 202 can move up and down without being obstructed by the four plates.

The abutment plate 203 is for regulating the front end in the longitudinal direction (X direction) of the paper stacked on the paper tray 202 , and the front end in the longitudinal direction of the paper is abutted against the abutment plate 203 . position is always the same.
The abutting plate 203 has a vertically extending scale portion 203a for the user to grasp the height of the sheets stacked on the sheet stacking tray 202 (thickness of the stack of sheets).
The abutting plate 203 also includes an upper limit sensor 203b for detecting that the paper (uppermost paper) stacked on the paper stacking tray 202 has reached a predetermined position (upper limit position) for paper feeding. have. That is, the upper limit sensor 203b determines whether or not the uppermost sheet of paper has reached the upper limit position when the paper stacking tray 202 is lifted by the driving unit 206, and when the paper reaches the upper limit position, the paper stacking tray The rise of 202 is stopped.
The upper limit sensor 203b includes, for example, a light-emitting portion and a light-receiving portion, and performs detection based on the presence or absence of light reception. However, the detection method is not limited to this as long as the detection target can be detected. For example, detection may be performed based on the driving amount of the driving unit 206 or the like.

The side guide plates 204, 204 are for regulating both sides of the paper placed on the paper stacking tray 202 from the width direction (Y direction).
Further, the rear end guide plate 205 is for regulating the paper placed on the paper stacking tray 202 from the rear end in the longitudinal direction.
Here, the openings 202b and 202b and the opening 202c have predetermined widths in the X direction and the Y direction, and the side guide plates 204 and 204 and the rear end guide plate 205 arranged inside each have a driving force. Its position can be adjusted within each opening by driving the part.
For example, inside the openings 202b, 202b, by adjusting the positions of the side guide plates 204, 204 so that they are separated from each other in the Y direction, it is possible to regulate both sides of a wider sheet. Further, by adjusting the position of the trailing edge guide plate 205 so as to be separated from the abutment plate 203 in the X direction inside the opening 202c, the trailing edge of a longer sheet can be regulated.
From the positions of the side guide plates 204 and 204 and the rear end guide plate 205, the size of the paper placed on the paper stacking tray 202 can be detected. In particular, when the position of the trailing edge guide plate 205 is behind the trailing edge position of the specified maximum size paper, the paper placed on the paper tray 202 is detected as long paper.
The side guide plates 204 and 204 and the trailing end guide plate 205 have a height up to the installation position of the upper limit sensor 203b in order to regulate the sheets stacked on the sheet stacking tray 202. FIG.

The drive unit 206 moves the paper tray 202 up and down under the control of the control unit 160 .
The paper stacking tray 202 is lowered to the lowest position by being driven by the drive unit 206 when paper is replenished. When the paper is fed to the image forming apparatus 100, the stacked paper (uppermost paper) is raised by driving the drive unit 206 until it reaches the upper limit position.
The drive unit 206 drives only the upward motion of the paper stacking tray 202, and the downward motion of the paper stacking tray 202 automatically releases the lock when the paper stacking tray 202 is pulled out by pulling the handle. It may be executed by a configuration such as descending to a lower level.

Also, above the paper feed unit 200, a paper detection mechanism 200A is arranged.
The paper detection mechanism 200A functions as a measurement unit for detecting the basis weight and thickness of the paper, and detects these under the control of the control unit 160. FIG. The detection result is stored in storage unit 170 .
The user passes the paper through the paper detecting mechanism 200A before placing the paper on the paper tray 202 of the paper feeding unit 200, thereby detecting the basis weight and thickness of the paper.

Specifically, the paper detection mechanism 200A includes a basis weight detection section SE10 and a thickness detection section SE20.
The basis weight detection unit SE10 includes, for example, a light emission sensor that irradiates the paper with light, a first light reception sensor that detects the amount of light transmitted through the paper, and a second light reception sensor that detects the amount of light reflected by the paper. The basis weight of paper is detected from the detection amounts of the first light receiving sensor and the second light receiving sensor.
Further, the thickness detection unit SE20 includes, for example, opposing physical sensors, and detects the thickness of the paper from the amount of movement of the physical sensors caused by sandwiching the paper.

Note that a double door-shaped cover that opens upward may be provided on the upper portion of the housing 201 , and sheets may be supplied into the housing 201 by opening the cover.
Further, the installation position of the paper detection mechanism 200A is not limited to above the paper feed unit 200, and can be set as appropriate in consideration of user's convenience. For example, if the paper feed unit 200 has a double door-shaped cover that opens upward on the upper part of the housing 201, the paper detection mechanism 200A is installed at an appropriate position near the image forming apparatus 100. Good luck.

<Paper processing unit>
The sheet processing unit 300 includes, for example, a sheet processing section 310, etc., performs sheet processing on sheets introduced from the image forming apparatus 100 as necessary, and discharges the sheets to the sheet discharge trays T1 and T2.

The paper processing unit 310 has a configuration for performing one or a plurality of types of paper processing such as punch folding, side stitching, saddle stitching, and cutting, and under the control of the control unit 160, as necessary, Paper processing is performed on the paper introduced from the image forming apparatus 100 .

In this embodiment, as described above, the control unit 160 of the image forming apparatus 100 also controls the operation of each unit constituting the image forming system 1. It is not limited. For example, a control device for controlling the operation of the image forming system 1 may be provided separately, or a control section may be provided individually for each unit.

[Operation of Image Forming System]
Next, the operation of the image forming system 1 according to this embodiment will be described.
In the image forming system 1 of the present embodiment, there is a case where the image forming process is performed on the long paper having a size larger than the standard paper having the size assumed in advance.
Then, in the image forming system 1, when the long paper is accommodated in the paper feed unit 200, a stacking limit setting process for setting a stacking limit corresponding to the long paper is executed in the paper tray 202. .

FIG. 4 is a flow chart showing the load limit setting process.
It is assumed that the paper tray 202 of the paper feed unit 200 is selected as a tray for feeding paper to the image forming apparatus 100 .
Also, this process is executed by cooperation between the control unit 160 and the program stored in the storage unit 170 .

First, immediately before the paper is placed on the paper stacking tray 202, the user sets information about the paper to be placed on the paper stacking tray 202 of the paper feeding unit 200 using the operation display unit 180 as a setting unit. , the control unit 160 stores this in the storage unit 170 as profile information (step S1).

Next, when the user passes the paper through the paper detecting mechanism 200A immediately before placing the paper on the paper stacking tray 202, the control unit 160 detects the information detected by the paper detecting mechanism 200A (paper basis weight, thickness ) is stored in the storage unit 170 (step S2).

Next, the control unit 160 acquires information about the paper (paper information) from the information stored in the storage unit 170 (step S3).
"Paper information" includes "thickness information" and "weight information" per sheet of paper.

As for the "thickness information", when the information registered as the profile information includes the corresponding information, the information is acquired. Specifically, if the profile information is registered immediately before the paper is placed on the paper stacking tray 202 and the thickness of the paper is included in the profile information, that information is acquired.
It is also possible to acquire the value detected by the paper detecting mechanism 200A immediately before the paper is placed on the paper stacking tray 202. FIG.
If the thickness of the paper is registered as profile information and the thickness of the paper is detected by the paper detection mechanism 200A, the profile information is prioritized.

As for the "weight information", if there is corresponding information in the information registered as the profile information, that information is acquired. Specifically, if the profile information is registered immediately before the paper is placed on the paper tray 202 and the weight of the paper is included in the profile information, that information is acquired.
Further, when the basis weight of the paper is detected by the paper detection mechanism 200A immediately before the paper is placed on the paper tray 202, if the size of the paper is registered in advance, the basis weight and size are detected. It is also possible to calculate the weight of the paper by multiplying it and acquire the calculated value.
If the weight of the paper is registered as the profile information and the basis weight of the paper is detected by the paper detection mechanism 200A and the weight is calculated, the profile information is given priority.

Next, the control unit 160 determines whether or not all necessary information has been acquired (step S4). is notified to the user (step S5), and then the process returns to step S1 to repeat the subsequent processes.
Specifically, control unit 160 determines whether or not "thickness information" and "weight information" have been acquired. As for the "weight information", it is only necessary to acquire basis weight information and paper size information for calculating this.
The processing of step S4 (NO) and step S5 occurs, for example, when the user does not register the thickness and weight of the paper as the profile information and does not pass the paper through the paper detection mechanism 200A. .
If even one piece of necessary information is missing, the control unit 160 notifies the user of the missing information through the operation display unit 180 .

On the other hand, if all the necessary information has been acquired (step S4: YES), the control unit 160 calculates the maximum load limit based on the "thickness information" and the "weight information" (step S6).
Calculation of the maximum load limit value will be described with reference to FIGS. 5(a) and 5(b).
Here, as an example, the mechanical height limit value of the paper stacking tray 202 is 400 mm, and the mechanical weight limit value of the paper stacking tray 202 is 95000 g.
Referring to FIG. 5A, when the paper information of "Paper C" is acquired, the number of sheets of 400 mm or less is "888" (overall thickness (height) 399.6 mm). However, with this number of sheets, the weight becomes "95904 g", which exceeds 95000 g.
Therefore, as shown in FIG. 5B, the number of sheets is set to "879 sheets" and the total thickness (height) is set to "395.6 mm" so that the weight is 95000 g or less. That is, for "Paper C", the maximum stacking limit value is "879 sheets" or "395.6 mm".

Similarly, when the paper information of "Paper D" is obtained, the number of sheets of 400 mm or less is "800" (overall thickness (height) 400 mm), as shown in FIG. 5A. With this number of sheets, the weight becomes "97200 g", which exceeds 95000 g.
Therefore, as shown in FIG. 5B, the number of sheets is set to "781 sheets" and the total thickness (height) is set to "390.5 mm" so that the weight is 95000 g or less. That is, in the case of "Paper D", the maximum stack limit value is "781 sheets" or "390.5 mm".

Next, the control unit 160 notifies the user of the calculation result (at least one of "number of sheets" and "height") through the operation display unit 180 (step S7).
As a result, the scale 203 provided on the housing 201 enables the user to stack sheets of a height (number of sheets) corresponding to the calculation result on the sheet stacking tray 202 of the sheet feeding unit 200 .

Next, when the user stacks the paper on the paper stacking tray 202 of the paper feeding unit 200, the control unit 160 calculates the size of the paper stacked on the paper stacking tray 202, and determines whether the paper is long. It is determined whether or not the sheet is a sheet (step S8).
Specifically, the control unit 160 calculates the paper size from the position of the guide plate of the paper tray 202, and if the calculated size is larger than the specified maximum paper size, it determines that the paper is long paper. do.

Here, if there is a difference of a predetermined value or more between the paper size included in the profile information registered immediately before the paper is placed on the paper stacking tray 202 and the size calculated in step S8, , the error message may be displayed on the operation display unit 180 to notify the user.

If it is determined that the paper is not the long sheet (step S8: NO), the control section 160 executes step S11, which will be described later.

On the other hand, if it is determined that the paper is long paper (step S8: YES), the control unit 160 notifies the user of a message prompting the user to confirm whether or not the maximum stacking limit value calculated by the operation display unit 180 is exceeded. (step S9).
For example, a message such as "Is the number of sheets less than the number of sheets that can be loaded?" is displayed.

Next, the control unit 160 determines whether or not there is a response operation to the message (step S10), and if there is no response operation (step S10: NO), repeats the process of step S10.
A response operation is, for example, a pressing operation for a display such as "yes" or "yes".

On the other hand, if there is a response operation (step S10: YES), the control unit 160 shifts to the lifting operation of the paper stacking tray 202 (lifting operation in preparation for paper feeding) (step S11), and ends this process. .

[Technical effects of the present embodiment]
As described above, according to the present embodiment, in the image forming apparatus 100 that feeds paper from the paper stacking tray 202 that can move up and down, the paper stacking tray 202 has a predetermined size of paper. The controller 160 acquires paper information about the paper, and determines the maximum number of paper that can be loaded on the paper tray 202 based on the acquired paper information. Calculates the load limit value and notifies the user of the calculated maximum load limit value.
Therefore, the user can stack even long sheets of paper up to the limit of the maximum stacking limit. That is, it is possible to perform appropriate stacking restrictions according to the type of paper.
Therefore, it is possible to reduce the number of paper replenishment times and improve productivity.

Further, according to the present embodiment, the paper information includes thickness information and weight information per sheet of paper.
Therefore, based on the thickness information and the weight information per sheet, the maximum stacking limit value of the long sheets that can be stacked on the sheet stacking tray 202 can be calculated.

Further, according to the present embodiment, the operation display unit 180 allows the user to perform an operation to set profile information regarding paper, and the actual measurement unit measures the paper. Paper information is acquired with priority given to profile information set via the operation display unit 180 over values.
Therefore, by obtaining paper information from paper profile information and measured values, it is possible to prevent a situation in which information is insufficient in calculating the maximum stacking limit value.

Further, according to the present embodiment, the actual measurement section includes a thickness detection section that detects the thickness of the paper.
Therefore, it is possible to actually measure the thickness of the paper.

Further, according to the present embodiment, the actual measurement unit includes a basis weight detection unit that detects the basis weight of the paper, and the control unit 160 acquires weight information by multiplying the basis weight of the paper by the size.
Therefore, it is possible to obtain the weight information using the actual measurement value of the basis weight of the paper.

Further, according to the present embodiment, when the acquired sheet information is insufficient, control unit 160 notifies the user of the insufficient information.
Therefore, the user can quickly grasp the information that is lacking in calculating the maximum load limit value.

Further, according to the present embodiment, when a long sheet is placed on sheet tray 202, control unit 160 displays a message prompting confirmation as to whether or not the calculated maximum stacking limit value is exceeded. Notify users.
Therefore, when the long paper is actually placed on the paper stacking tray 202, it is possible to prevent the user from erroneously loading the long paper exceeding the maximum stacking limit value.

[others]
As described above, the embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be changed as appropriate without departing from the scope of the present invention.

For example, in the above embodiment, paper information is obtained using profile information and measured values, but paper information may be obtained only from profile information. By doing so, it is possible to acquire the paper information without the trouble of actually measuring the paper.
Alternatively, paper information may be acquired only from the actual measurement unit. By doing so, it is possible to obtain more accurate paper information because the paper information is obtained from the actual measurement values.

Further, in the above-described embodiment, the paper information is obtained with priority given to the profile information among the profile information and the measured values, but the paper information may be obtained with priority given to the measured values.

Further, in the above-described embodiment, it is assumed that the paper stacking tray 202 is lowered to the lowest position when the paper is stored in the paper stacking tray 202. It is also possible to have a configuration in which it is lowered only up to. In this case, since the user can be notified of the maximum stacking limit value based on the height of the paper tray 202, the maximum stacking limit value may not be displayed on the operation display unit 180. FIG.

1 Image Forming System 100 Image Forming Device 110 Document Reading Section 120 Paper Feeding Section 130 Paper Conveying Section 140 Image Forming Section 150 Fixing Section 160 Control Section (Acquiring Means, Calculating Means, Notifying Means, Confirming Means, Paper Feeding Device)
170 storage unit 180 operation display unit (notification means, confirmation means, setting unit)
190 communication unit 200 paper feeding unit (paper feeding device)
201 housing 202 paper stacking tray 203 abutment plate 203a scale portion 203b upper limit sensor 204 side guide plate 205 rear end guide plate 206 drive unit 200A paper detection mechanism (measurement unit)
SE10 grammage detection unit SE20 thickness detection unit 300 paper processing unit 310 paper processing unit

Claims (25)

In an image forming apparatus that feeds paper using a vertically movable paper stacking tray,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
with
The image forming apparatus according to claim 1, wherein, when the sheet information acquired by the acquisition means is insufficient, the notification means notifies the user of the insufficient information. The paper information is
2. The image forming apparatus according to claim 1 , further comprising thickness information and weight information per sheet of paper. It has a setting unit that accepts a user's setting operation for profile information related to paper,
3. The image forming apparatus according to claim 1 , wherein said acquisition unit acquires said paper information from said profile information set via said setting unit. A measurement unit that actually measures the paper information of the paper,
3. The image forming apparatus according to claim 1 , wherein the acquiring unit acquires the sheet information from the measured values measured by the measuring unit. a setting unit that receives a user's setting operation for profile information related to paper;
a measurement unit that actually measures the paper information of the paper,
3. The obtaining means obtains the paper information by prioritizing the profile information set via the setting unit over the measured value measured by the actual measurement unit . The image forming apparatus according to . 6. The image forming apparatus according to claim 4 , wherein the measuring section includes a thickness detection section that detects the thickness of the paper. In an image forming apparatus that feeds paper using a vertically movable paper stacking tray,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
a measuring unit that actually measures the paper information of the paper;
with
The acquisition means acquires the paper information from the measured values measured by the actual measurement unit,
The image forming apparatus, wherein the measurement unit includes a thickness detection unit that detects the thickness of the sheet. In an image forming apparatus that feeds paper using a vertically movable paper stacking tray,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
a setting unit that receives a user's setting operation for profile information related to paper;
a measuring unit that actually measures the paper information of the paper;
with
the acquisition unit acquires the paper information by prioritizing the profile information set via the setting unit over the measured value measured by the actual measurement unit;
The image forming apparatus, wherein the measurement unit includes a thickness detection unit that detects the thickness of the sheet. The actual measurement unit includes a basis weight detection unit that detects the basis weight of the paper,
9. The image forming apparatus according to claim 4 , wherein the acquisition unit acquires the weight of the paper by multiplying the basis weight of the paper by the size of the paper. In an image forming apparatus that feeds paper using a vertically movable paper stacking tray,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
a measuring unit that actually measures the paper information of the paper;
with
The acquisition means acquires the paper information from the measured values measured by the actual measurement unit,
The actual measurement unit includes a basis weight detection unit that detects the basis weight of the paper,
The image forming apparatus, wherein the acquisition unit acquires the weight of the paper by multiplying the basis weight of the paper by the size of the paper. In an image forming apparatus that feeds paper using a vertically movable paper stacking tray,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
a setting unit that receives a user's setting operation for profile information related to paper;
a measuring unit that actually measures the paper information of the paper;
with
the acquisition unit acquires the paper information by prioritizing the profile information set via the setting unit over the measured value measured by the actual measurement unit;
The actual measurement unit includes a basis weight detection unit that detects the basis weight of the paper,
The image forming apparatus, wherein the acquisition unit acquires the weight of the paper by multiplying the basis weight of the paper by the size of the paper. confirmation means for notifying a user of a message prompting confirmation as to whether or not the maximum stacking limit value calculated by the calculation means is exceeded when the large size paper is placed on the paper tray. The image forming apparatus according to any one of claims 1 to 11 , characterized by: In an image forming apparatus that feeds paper using a vertically movable paper stacking tray,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
confirming means for notifying a user of a message prompting the user to confirm whether or not the maximum stacking limit value calculated by the calculating means is exceeded when the large size paper is placed on the paper stacking tray;
An image forming apparatus comprising: In a paper feeder equipped with a paper stacking tray that can move up and down,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
a measuring unit that actually measures the paper information of the paper;
with
The acquisition means acquires the paper information from the measured values measured by the actual measurement unit,
The paper feeding device, wherein the actual measurement unit includes a thickness detection unit that detects the thickness of the paper. In a paper feeder equipped with a paper stacking tray that can move up and down,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
a setting unit that receives a user's setting operation for profile information related to paper;
a measuring unit that actually measures the paper information of the paper;
with
the acquisition unit acquires the paper information by prioritizing the profile information set via the setting unit over the measured value measured by the actual measurement unit;
The paper feeding device, wherein the actual measurement unit includes a thickness detection unit that detects the thickness of the paper. In a paper feeder equipped with a paper stacking tray that can move up and down,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
a measuring unit that actually measures the paper information of the paper;
with
The acquisition means acquires the paper information from the measured values measured by the actual measurement unit,
The actual measurement unit includes a basis weight detection unit that detects the basis weight of the paper,
The paper feeding device, wherein the obtaining means obtains the weight of the paper by multiplying the basis weight of the paper by the size of the paper. In a paper feeder equipped with a paper stacking tray that can move up and down,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
a setting unit that receives a user's setting operation for profile information related to paper;
a measuring unit that actually measures the paper information of the paper;
with
the acquisition unit acquires the paper information by prioritizing the profile information set via the setting unit over the measured value measured by the actual measurement unit;
The actual measurement unit includes a basis weight detection unit that detects the basis weight of the paper,
The paper feeding device, wherein the obtaining means obtains the weight of the paper by multiplying the basis weight of the paper by the size of the paper. In a paper feeder equipped with a paper stacking tray that can move up and down,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
with
The paper feeding device, wherein the notification means notifies a user of the insufficient information when the paper information acquired by the acquisition means is insufficient. In a paper feeder equipped with a paper stacking tray that can move up and down,
A paper having a size larger than a predetermined size can be placed on the paper placement tray,
Acquisition means for acquiring paper information about paper;
calculating means for calculating a maximum stacking limit value of sheets that can be stacked on the sheet tray based on the sheet information acquired by the acquiring means;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
confirming means for notifying a user of a message prompting the user to confirm whether or not the maximum stacking limit value calculated by the calculating means is exceeded when the large size paper is placed on the paper stacking tray;
A sheet feeding device comprising: A measuring unit that can place paper having a size larger than a predetermined size, feeds paper from a vertically movable paper loading tray, and actually measures paper information related to the paper, wherein the measuring unit measures the paper A computer of an image forming apparatus equipped with a thickness detection unit that detects the thickness of
acquisition means for acquiring the paper information;
calculation means for calculating, based on the paper information acquired by the acquisition means, a maximum stacking limit value of paper that can be loaded on the paper tray;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
function as
The acquisition means is a program for acquiring the paper information from the measured values measured by the actual measurement unit. A setting unit that can load paper of a size larger than a predetermined size, feeds paper from a paper tray that can move up and down, and accepts user setting operations for profile information related to paper, and paper related to paper a measuring unit that measures information, the measuring unit comprising a thickness detection unit that detects the thickness of a sheet of paper, the computer of the image forming apparatus,
acquisition means for acquiring the paper information;
calculation means for calculating, based on the paper information acquired by the acquisition means, a maximum stacking limit value of paper that can be loaded on the paper tray;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
function as
A program in which the acquisition unit acquires the paper information by prioritizing the profile information set via the setting unit over the measured value measured by the actual measurement unit. A measuring unit that can place paper having a size larger than a predetermined size, feeds paper from a vertically movable paper loading tray, and actually measures paper information related to the paper, wherein the measuring unit measures the paper A computer of an image forming apparatus equipped with a basis weight detection unit that detects the basis weight of
acquisition means for acquiring the paper information;
calculation means for calculating, based on the paper information acquired by the acquisition means, a maximum stacking limit value of paper that can be loaded on the paper tray;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
function as
A program in which the acquisition means acquires the paper information from the measured values measured by the actual measurement unit, multiplies the basis weight of the paper by the size of the paper, and obtains the weight of the paper. A setting unit that can load paper of a size larger than a predetermined size, feeds paper from a paper tray that can move up and down, and accepts user setting operations for profile information related to paper, and paper related to paper a measurement unit that actually measures information, the measurement unit comprising a basis weight detection unit that detects the basis weight of paper, the computer of the image forming apparatus,
acquisition means for acquiring the paper information;
calculation means for calculating, based on the paper information acquired by the acquisition means, a maximum stacking limit value of paper that can be loaded on the paper tray;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
function as
The acquisition means acquires the paper information by prioritizing the profile information set via the setting unit over the measured value measured by the actual measurement unit, and assigns the paper size to the basis weight of the paper. A program that multiplies and obtains the weight of the paper. A computer of an image forming apparatus that can load paper having a size larger than a predetermined size and feed paper from a vertically movable paper loading tray,
Acquisition means for acquiring paper information about paper;
calculation means for calculating, based on the paper information acquired by the acquisition means, a maximum stacking limit value of paper that can be loaded on the paper tray;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
function as
The notification means is a program for notifying a user of the insufficient information when the paper information acquired by the acquisition means is insufficient. A computer of an image forming apparatus that can load paper having a size larger than a predetermined size and feed paper from a vertically movable paper loading tray,
Acquisition means for acquiring paper information about paper;
calculation means for calculating, based on the paper information acquired by the acquisition means, a maximum stacking limit value of paper that can be loaded on the paper tray;
notification means for notifying the user of the maximum load limit value calculated by the calculation means;
Confirmation means for notifying a user of a message prompting the user to confirm whether or not the maximum stacking limit value calculated by the calculation means is exceeded when the large size paper is placed on the paper tray;
A program that acts as a

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