JP2002160828A - Paper size detecting device, image forming device and paper size detecting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper size detecting device, an image forming device and a paper size detecting method capable of improving the accuracy of the paper size detection and discriminating AB system papers and inch system papers. SOLUTION: This paper size detecting device includes a paper feed try for loading the recording papers, and a pair of side edge regulating members slidably provided in a direction crossing the paper feeding direction to respectively abut on each side edge of the recording papers extended in the paper feeding direction. The pair of side edge regulating members respectively abut on the recording paper to detect the size of the recording paper. This paper size detecting device has a first and a second detection transmitting members to be moved in response to the quantity of the movement of at least one of the side edge regulating members, and has a detecting means for detecting the size of the recording paper on the basis of the quantity of the movement of each first and second detection transmitting means. Accurate detection of the paper size is thereby realized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper size detecting device, an image forming device, and a paper size detecting method.

[0002]

2. Description of the Related Art Generally, an image forming apparatus of this type is provided with a paper size detecting device for detecting the size of paper mounted on a paper feed tray or a manual feed tray.

For example, as shown in FIG. 11, in order to detect the paper size by the paper size detection device 200, first, a pair of side edge regulating members respectively arranged in the direction of both ends in the width direction of the paper Y are used. By sliding the 202A, 202B in the direction of the arrow in the figure, the side edge regulating members 202A, 202B are brought into contact with both ends of the paper. At this time, a transmission mechanism capable of reducing the rotation of the gear 206 in multiple stages by rotating the gear 206 meshed between the spur gears 204A, 204B respectively connected to the pair of side edge regulating members 202A, 202B. One rotary resistor 212 coupled to 210
, The paper size is detected based on the rotation angle.

In this rotary resistor 212, the maximum size to the minimum size are detected within the linear compensation range of the rotary resistor 212.

[0005]

Incidentally, in recent years, for example, A4 size and B5
There are many situations in which so-called AB paper having a size or the like and inch paper widely used in Europe and the United States are mixed and used in an image forming apparatus.

However, when the AB paper size and the inch paper size are compared, there is a case where the difference in size is slightly different in some parts. The size detection device cannot identify this difference,
There is a fear that a problem may occur that a paper having a certain size is mistaken for a paper having a certain size.

[0007] In addition, inexpensive rotary resistors have a narrow linear compensation range and a low resolution, so that the accuracy of paper size detection is inferior.
In some cases, B-type paper could not be distinguished.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to improve the accuracy of paper size detection and to distinguish between AB-based paper and inch-based paper. An object of the present invention is to provide a paper size detection device, an image forming device, and a paper size detection method.

[0009]

According to a first aspect of the present invention, there is provided a paper feed tray on which recording paper is placed, and the paper tray is formed so as to extend in a paper feeding direction of the recording paper. A pair of side edge regulating members slidably provided in a direction intersecting with the paper feeding direction so as to abut against each side edge, respectively; A paper size detection device for detecting the paper size of the recording paper, wherein at least one of the plurality of detection transmission members interlocked according to the amount of movement of the one side edge regulating member; Detecting means for detecting the paper size of the recording paper based on each movement amount.

According to a second aspect of the present invention, there is provided a paper feed tray on which a recording paper is placed, and wherein the paper supply tray is in contact with each side edge extending in the paper feeding direction of the recording paper. A pair of side edge regulating members provided so as to be slidable interlockingly in a direction intersecting the paper direction, and detecting the paper size of the recording paper by bringing the pair of side edge regulating members into contact with each other. A paper size detection device, wherein a region from one side edge of the recording paper to a center line is at least a first region,
A first detection transmission member that is divided into a second region and interlocks in accordance with the amount of movement of the one side edge regulating member in the divided first region; A second detection / transmission member that is interlocked in accordance with a movement amount in the second area, a movement amount of the first detection / transmission member, and a movement amount of the second detection / transmission member; And a detecting means for detecting the paper size.

According to a third aspect of the present invention, there is provided a paper feed tray on which recording paper is placed, and wherein the paper feed tray is provided so as to abut each side edge formed to extend in the paper feeding direction of the recording paper. A pair of side edge regulating members provided so as to be slidable interlockingly in a direction intersecting the paper direction, and detecting the paper size of the recording paper by bringing the pair of side edge regulating members into contact with each other. A region from one side edge of the recording paper to a center line is divided into a plurality of regions, and the one side edge regulating member moves in each of the plurality of divided regions. A plurality of detection transmission members that are interlocked with each other in accordance with an amount, and detection means for detecting a paper size of the recording paper based on a movement amount of each of the plurality of detection transmission members. .

According to a fourth aspect of the present invention, there is provided a paper feed tray in which a manual feed tray on which a recording paper is placed is in contact with each side edge formed to extend in the paper feeding direction. A pair of side edge regulating members slidably provided in a direction intersecting the direction, and a paper size detection unit for detecting a paper size of the recording paper by bringing the pair of side edge regulating members into contact with each other. An apparatus, wherein a plurality of each detection transmission member interlocked according to the amount of movement of at least the one side edge regulating member,
Detecting means for detecting the paper size of the recording paper based on the amount of movement of each of the plurality of detection transmitting members.

According to a fifth aspect of the present invention, there is provided the paper feed tray, wherein the paper feed tray is provided so as to abut a manual feed tray on which the recording paper is placed, and each side edge extending in the paper feed direction of the recording paper. And a pair of side edge regulating members provided so as to be slidable in conjunction with each other in a direction intersecting the direction, and detecting the paper size of the recording paper by bringing the pair of side edge regulating members into contact with each other. A paper size detection device, wherein an area from one side edge of the recording paper to a center line is divided into at least a first area and a second area, and the one of the divided first areas is A first detection transmission member that is interlocked according to the amount of movement of the side edge regulating member, and a second detection transmission member that is interlocked according to the amount of movement of the one side edge regulation member in the second region, Movement amount of the first detection transmission member and movement of the second detection transmission member Based on bets, it is characterized by comprising a detecting means for detecting the sheet size of the recording paper.

According to a sixth aspect of the present invention, there is provided a paper feed tray, wherein a manual feed tray on which a recording paper is placed is contacted with each side edge formed so as to extend in a paper feeding direction of the recording paper. And a pair of side edge regulating members provided so as to be slidable in conjunction with each other in a direction intersecting the direction, and detecting the paper size of the recording paper by bringing the pair of side edge regulating members into contact with each other. A paper size detection device, wherein an area from one side edge of the recording paper to a center line is divided into a plurality of areas,
The plurality of detection transmission members, which are interlocked with each other in accordance with the amount of movement of the one side edge regulating member in each of the plurality of divided regions, based on the amount of movement of each of the plurality of detection transmission members, Detecting means for detecting the paper size of the recording paper.

According to a seventh aspect of the present invention, the paper feed tray on which the recording paper is placed is in contact with each side edge formed so as to extend in a direction intersecting the paper feeding direction. To
A pair of side edge regulating members slidably provided in the paper feeding direction, and a paper size detecting device for detecting the paper size of the recording paper by bringing the pair of side edge regulating members into contact with each other. And a plurality of detection transmission members interlocked in accordance with at least an amount of movement of the one side edge regulating member, and a paper size of the recording paper based on a movement amount of each of the plurality of detection transmission members. And detecting means for detecting.

According to another aspect of the present invention, the paper feed tray on which the recording paper is placed is in contact with each side edge formed to extend in a direction intersecting the paper feeding direction. To
A pair of side edge regulating members slidably provided in the paper feeding direction, and a paper size detecting device for detecting the paper size of the recording paper by bringing the pair of side edge regulating members into contact with each other. Wherein an area from one side edge of the recording paper to a center line is divided into at least a first area and a second area, and the one side edge regulating member in the divided first area A first detection transmission member that is interlocked in accordance with the amount of movement of the second detection transmission member; a second detection transmission member that is interlocked in accordance with the amount of movement of the one side edge regulating member in the second region; A detecting unit configured to detect a paper size of the recording paper based on a movement amount of the detection transmission member and a movement amount of the second detection transmission member.

According to a ninth aspect of the present invention, the paper feed tray on which the recording paper is placed and the side edges formed to extend in a direction intersecting with the paper feeding direction of the recording paper are in contact with each other. To
A pair of side edge regulating members slidably provided in the paper feeding direction, and a paper size detecting device for detecting the paper size of the recording paper by bringing the pair of side edge regulating members into contact with each other. An area from one side edge of the recording paper to the center line is divided into a plurality of areas, and each of the plurality of divided areas is determined in accordance with an amount of movement of the one side edge regulating member in each of the plurality of divided areas. It is characterized in that it includes a plurality of linked detection transmitting members and a detecting means for detecting the paper size of the recording paper based on the amount of movement of each of the plurality of detection transmitting members.

According to a tenth aspect of the present invention, in the detecting means, the first detection transmitting member slides in one direction and rotates counterclockwise, and the second detection transmitting member rotates in one direction. It is characterized in that it is a rotary size detecting means that slides in the direction and rotates clockwise.

Further, according to the present invention, the movement of the first detection transmission member and the movement of the second detection transmission member are determined in accordance with the amount of movement of the one side edge regulating member. It is characterized by further comprising switching means for switching.

According to a twelfth aspect of the present invention, the detecting means includes an area detecting means for determining which of the first and second areas the one side edge regulating member is. It is characterized by:

According to a thirteenth aspect of the present invention, the detecting means includes an area detecting means for determining which of the plurality of areas the one side edge regulating member is located in. I have.

According to a fourteenth aspect of the present invention, there is provided a paper size detecting device for detecting a paper size of a recording paper placed on a paper feed tray, wherein a moving amount from a maximum detectable size to a minimum size is detected. Is divided into at least two first and second regions, and a compensation range of at least one detection unit is assigned to each of the first and second regions.

According to a fifteenth aspect of the present invention, there is provided a paper size detecting device for detecting a paper size of a recording paper placed on a paper feed tray, wherein a moving amount from a maximum detectable size to a minimum size is detected. Is divided into a plurality of areas, and at least one compensation range of the detecting means is assigned to each area.

According to a sixteenth aspect of the present invention, there is provided a paper size detecting device for detecting a paper size of a recording paper placed on a manual feed tray, wherein a movement amount from a maximum detectable size to a minimum size is detected. It is characterized in that at least two first and second areas are divided and a compensation range of at least one detecting means is assigned to each of the first and second areas.

According to a seventeenth aspect of the present invention, there is provided a paper size detecting device for detecting a paper size of a recording paper placed on a manual feed tray, wherein a moving amount from a maximum detectable size to a minimum size is detected. It is characterized in that the area is divided into a plurality of areas, and a compensation range of at least one detecting means is assigned to each area.

The invention according to claim 18 is an image forming apparatus for feeding the recording paper from a paper feed tray on which the recording paper is placed via a transport system and forming an image on the recording paper. A pair of side edge regulating members provided to be slidable in a direction intersecting with the paper feeding direction so as to abut against respective side edges formed to extend in the paper feeding direction of the recording paper; At least a plurality of detection transmission members interlocked in accordance with an amount of movement of the one side edge regulating member, and a paper size of the recording paper in the paper supply tray based on a movement amount of each of the plurality of detection transmission members. Detecting means for detecting a paper size, a display means for displaying a paper size setting screen for setting a paper size of the recording paper on which an image is to be formed, and the paper feeding screen on the paper size setting screen based on a detection result of the detecting means. The location of the recording paper placed on the tray Is characterized in that it comprises a control means for controlling to display a paper size standards, the.

The invention according to claim 19 is an image forming apparatus which feeds the recording paper from a paper feed tray on which the recording paper is placed via a transport system and forms an image on the recording paper. A pair of side edge regulating members slidably provided in a direction intersecting the sheet feeding direction so as to abut against respective side edges formed to extend in the sheet feeding direction of the recording sheet. A member and an area from one side edge of the recording paper to a center line is divided into at least a first area and a second area, and the one side edge regulating member in the divided first area is A first detection transmission member that operates in accordance with the amount of movement,
A second detection transmission member that interlocks with a movement amount of the one side edge regulating member in the second region, a movement amount of the first detection transmission member, and a movement amount of the second detection transmission member. Detecting means for detecting the paper size of the recording paper in the paper feed tray based on the movement amount; display means for displaying a paper size setting screen for setting the paper size of the recording paper on which an image is to be formed;
Control means for controlling to display a paper size of a predetermined standard of the recording paper placed on the paper feed tray on the paper size setting screen based on a detection result of the detection means,
It is characterized by including.

According to a twentieth aspect of the present invention, there is provided an image forming apparatus for feeding the recording paper from a paper feed tray on which the recording paper is placed via a transport system to form an image on the recording paper. A pair of side edge regulating members slidably provided in a direction intersecting the sheet feeding direction so as to abut against respective side edges formed to extend in the sheet feeding direction of the recording sheet. The member and an area from one side edge of the recording paper to the center line are divided into a plurality of areas, and each of the areas is interlocked according to the amount of movement of the one side edge regulating member in each of the plurality of divided areas. Detecting means for detecting the paper size of the recording paper in the paper feed tray based on the amount of movement of each of the plurality of detection transmitting members, and a sheet of the recording paper for forming an image. Display hand that displays the paper size setting screen for setting the size And control means for controlling to display a paper size of a predetermined standard of the recording paper placed on the paper feed tray on the paper size setting screen based on a detection result of the detection means. It is characterized by:

According to a twenty-first aspect of the present invention, there is provided an image forming apparatus for feeding the recording paper from a manual feed tray on which the recording paper is placed via a conveyance system to form an image on the recording paper. A pair of side edge regulating members slidably provided in a direction intersecting the sheet feeding direction so as to abut against respective side edges formed to extend in the sheet feeding direction of the recording sheet; A plurality of detection transmission members interlocked in accordance with the amount of movement of the one side edge regulating member, and the paper size of the recording paper in the manual feed tray is detected based on the amount of movement of each of the plurality of detection transmission members. A paper size setting screen for setting a paper size of the recording paper on which an image is to be formed; and a paper size setting screen based on a detection result of the detecting means. Said record placed It is characterized in that it comprises a control means for controlling to display the paper size of a predetermined standard, the.

According to a twenty-second aspect of the present invention, there is provided an image forming apparatus which feeds the recording paper from a manual feed tray on which the recording paper is placed via a transport system and forms an image on the recording paper. A pair of side edge regulating members slidably provided in a direction intersecting with the sheet feeding direction so as to abut against respective side edges formed to extend in the sheet feeding direction of the recording sheet. And dividing a region from one side edge of the recording paper to a center line into at least a first region and a second region, and moving the one side edge regulating member in the divided first region. A first detection transmission member interlocked according to the amount, a second detection transmission member interlocked according to the amount of movement of the one side edge regulating member in the second region, and the first detection transmission Based on the amount of movement of the member and the amount of movement of the second detection transmitting member, Detecting means for detecting the paper size of the recording paper in the manual feed tray; display means for displaying a paper size setting screen for setting the paper size of the recording paper on which an image is to be formed; and detecting the paper size based on a detection result of the detecting means. Control means for controlling a size of the recording paper placed on the manual feed tray to be displayed on a size setting screen so as to display a paper size of a predetermined standard.

According to a twenty-third aspect of the present invention, there is provided an image forming apparatus which feeds the recording paper from a manual feed tray on which the recording paper is placed via a transport system and forms an image on the recording paper. A pair of side edge regulating members slidably provided in a direction intersecting with the sheet feeding direction so as to abut against respective side edges formed to extend in the sheet feeding direction of the recording sheet. And dividing the area from one side edge of the recording paper to the center line into a plurality of areas, and interlocking each other according to the amount of movement of the one side edge regulating member in each of the plurality of divided areas. A plurality of detection transmission members, detection means for detecting a paper size of the recording paper in the manual feed tray based on a moving amount of each of the plurality of detection transmission members, and a paper size of the recording paper for forming an image. Table for displaying the paper size setting screen to be set Means, and control means for controlling to display a paper size of a predetermined standard of the recording paper placed on the manual feed tray on the paper size setting screen based on a detection result of the detection means. It is characterized by:

The invention according to claim 24 is an image forming apparatus which feeds the recording paper from a paper feed tray on which the recording paper is placed via a transport system and forms an image on the recording paper. A pair of side edge regulating members slidably provided in the sheet feeding direction so as to abut against respective side edges formed to extend in a direction intersecting the sheet feeding direction of the recording sheet; At least a plurality of detection transmission members interlocked in accordance with an amount of movement of the one side edge regulating member, and a paper size of the recording paper in the paper supply tray based on a movement amount of each of the plurality of detection transmission members. Detecting means for detecting a paper size, a display means for displaying a paper size setting screen for setting a paper size of the recording paper on which an image is to be formed, and the paper feeding screen on the paper size setting screen based on a detection result of the detecting means. The location of the recording paper placed on the tray Is characterized in that it comprises a control means for controlling to display a paper size standards, the.

An image forming apparatus according to a twenty-fifth aspect of the present invention is an image forming apparatus which feeds the recording paper from a paper feed tray on which the recording paper is placed via a transport system and forms an image on the recording paper. A pair of side edge regulating members slidably provided in the sheet feeding direction so as to abut against respective side edges formed to extend in a direction intersecting the sheet feeding direction of the recording sheet; An area from one side edge of the recording paper to the center line is divided into at least a first area and a second area, and the movement amount of the one side edge regulating member in the divided first area is determined. A first detection transmission member interlocked in accordance with the first detection transmission member, a second detection transmission member interlocked in accordance with the amount of movement of the one side edge regulating member in the second region, and a first detection transmission member. Based on the amount of movement and the amount of movement of the second detection transmitting member, Detecting means for detecting the size; display means for displaying a paper size setting screen for setting the paper size of the recording paper on which an image is to be formed; and feeding the paper on the paper size setting screen based on the detection result of the detecting means. And control means for controlling to display a paper size of a predetermined standard of the recording paper placed on a paper tray.

An image forming apparatus according to a twenty-sixth aspect of the present invention is an image forming apparatus for feeding the recording paper from a paper feed tray on which the recording paper is placed via a transport system and forming an image on the recording paper. A pair of side edge regulating members slidably provided in the sheet feeding direction so as to abut against respective side edges formed to extend in a direction intersecting the sheet feeding direction of the recording sheet; The area from one side edge to the center line of the recording paper is divided into a plurality of areas, and a plurality of areas interlocked with each other according to the amount of movement of the one side edge regulating member in each of the plurality of divided areas. A detection unit that detects the paper size of the recording paper based on each detection transmission member, the amount of movement of each of the plurality of detection transmission members, and a paper size setting screen that sets the paper size of the recording paper on which an image is formed Display means for displaying
Control means for controlling to display a paper size of a predetermined standard of the recording paper placed on the paper feed tray on the paper size setting screen based on a detection result of the detection means,
It is characterized by including.

According to a twenty-seventh aspect of the present invention, there is provided a first mode in which an image is formed by a facsimile procedure, a second mode in which an image is formed by data from an information processing apparatus, and image information from a document reading means. A third mode of forming an image based on the recording paper is used by mode switching, and the recording paper is fed from a paper feed tray on which the recording paper is placed via a transport system to form an image on the recording paper. A composite image forming apparatus, which is provided so as to be slidable in a direction intersecting with the paper feeding direction so as to abut each side edge formed to extend in the paper feeding direction of the recording paper. A pair of side edge regulating members, a plurality of detection transmission members interlocked in accordance with a moving amount of at least the one side edge regulating member, and the sheet feeding based on a moving amount of each of the plurality of detection transmitting members. The recording paper in the tray Detecting means for detecting the size of the recording paper, display means for displaying a paper size setting screen for setting the paper size of the recording paper on which an image is to be formed, and the paper supply setting screen based on the detection result of the detecting means. And control means for controlling to display a paper size of a predetermined standard of the recording paper placed on a paper tray.

According to a twenty-eighth aspect of the present invention, there is provided a first mode in which an image is formed by a facsimile procedure, a second mode in which an image is formed by data from an information processing apparatus, and a method in which image information from a document reading means is used. A third mode of forming an image based on the recording paper is used by mode switching, and the recording paper is fed from a paper feed tray on which the recording paper is placed via a transport system to form an image on the recording paper. A composite image forming apparatus, wherein the slide member is slidably movable in a direction intersecting with the paper feeding direction so as to abut each side edge formed to extend in the paper feeding direction of the recording paper. A pair of side edge regulating members provided, and a region from one side edge of the recording paper to the center line is divided into at least a first region and a second region, and the divided first region is divided into two regions. Movement of the one side edge regulating member First detection transmission member, a second detecting transmission member interlocked according to the movement amount in the second region of the one side edge regulating member interlocked in response to the first
Detecting means for detecting the paper size of the recording paper in the paper feed tray based on the movement amount of the detection transmission member and the movement amount of the second detection transmission member, and the paper size of the recording paper on which an image is formed. Display means for displaying a paper size setting screen for setting, and a paper size of a predetermined standard of the recording paper placed on the paper feed tray is displayed on the paper size setting screen based on a detection result of the detecting means. And control means for controlling the display.

Further, according to the present invention, there is provided a first mode in which an image is formed by a facsimile procedure, a second mode in which an image is formed by data from an information processing apparatus, and image information from a document reading means. A third mode of forming an image based on the recording paper is used by mode switching, and the recording paper is fed from a paper feed tray on which the recording paper is placed via a transport system to form an image on the recording paper. A composite image forming apparatus, wherein the slide member is slidably movable in a direction intersecting with the paper feeding direction so as to abut each side edge formed to extend in the paper feeding direction of the recording paper. A pair of side edge regulating members provided, and a region from one side edge of the recording paper to the center line is divided into a plurality of regions, and the one side edge regulating member in each of the plurality of divided regions. Work together according to the amount of movement A plurality of detection transmission members; detection means for detecting a paper size of the recording paper in the paper feed tray based on a moving amount of each of the plurality of detection transmission members; and a paper size of the recording paper for forming an image. Display means for displaying a paper size setting screen for setting, and a paper size of a predetermined standard of the recording paper placed on the paper feed tray is displayed on the paper size setting screen based on a detection result of the detecting means. And control means for controlling the display.

The invention according to claim 30 is characterized in that a first mode in which an image is formed by a facsimile procedure, a second mode in which an image is formed by data from an information processing apparatus, and image information from a document reading means. A third mode in which image formation is performed based on the mode switching, and the recording paper is fed via a conveyance system from a manual feed tray on which the recording paper is placed to form an image on the recording paper. Image forming apparatus, wherein a pair of slidably provided in a direction intersecting the paper feeding direction so as to abut against respective side edges formed to extend in the paper feeding direction of the recording paper. A side edge regulating member, a plurality of detection transmission members interlocked in accordance with at least an amount of movement of the one side edge regulation member, and The recording paper Detecting means for detecting the paper size; display means for displaying a paper size setting screen for setting the paper size of the recording paper on which an image is to be formed; and, on the paper size setting screen based on the detection result of the detecting means, And control means for controlling to display a paper size of a predetermined standard of the recording paper placed on the manual feed tray.

According to a thirty-first aspect of the present invention, there is provided a first mode in which an image is formed by a facsimile procedure, a second mode in which an image is formed by data from an information processing apparatus, and a method in which image information from a document reading means is used. A third mode in which image formation is performed based on the mode switching, and the recording paper is fed via a conveyance system from a manual feed tray on which the recording paper is placed to form an image on the recording paper. Type image forming apparatus, provided so as to be slidable interlockingly in a direction intersecting with the paper feeding direction so as to abut each side edge formed to extend in the paper feeding direction of the recording paper. A pair of side edge regulating members, and a region from one side edge of the recording paper to a center line is divided into at least a first region and a second region. Transfer of one side edge regulating member A first detection transmission member interlocked according to the amount, a second detection transmission member interlocked according to the amount of movement of the one side edge regulating member in the second region, and the first detection transmission Detecting means for detecting the paper size of the recording paper in the manual feed tray based on the amount of movement of the member and the amount of movement of the second detection transmitting member; and paper for setting the paper size of the recording paper on which an image is to be formed. Display means for displaying a size setting screen, and control to display a predetermined standard paper size of the recording paper placed on the manual feed tray on the paper size setting screen based on a detection result of the detecting means. And control means for performing the operation.

Further, according to the present invention, there is provided a first mode in which an image is formed by a facsimile procedure, a second mode in which an image is formed by data from an information processing apparatus, and image information from a document reading means. A third mode in which image formation is performed based on the mode switching, and the recording paper is fed via a conveyance system from a manual feed tray on which the recording paper is placed to form an image on the recording paper. Type image forming apparatus, provided so as to be slidable interlockingly in a direction intersecting with the paper feeding direction so as to abut each side edge formed to extend in the paper feeding direction of the recording paper. A pair of side edge regulating members, and a region from one side edge of the recording paper to a center line is divided into a plurality of regions, and the one side edge regulating member in each of the plurality of divided regions is divided into a plurality of regions. Each is linked according to the amount of movement Detecting means for detecting a paper size of the recording paper in the manual feed tray based on a moving amount of each of the plurality of detection transmitting members, and a paper size of the recording paper for forming an image. A display unit for displaying a paper size setting screen for setting the paper size, and a predetermined standard paper size of the recording paper placed on the manual feed tray is displayed on the paper size setting screen based on a detection result of the detection unit. And control means for performing control to perform the control.

According to a thirty-third aspect of the present invention, there is provided a first mode in which an image is formed by a facsimile procedure, a second mode in which an image is formed by data from an information processing apparatus, and image information from a document reading means. A third mode of forming an image based on the recording paper is used by mode switching, and the recording paper is fed from a paper feed tray on which the recording paper is placed via a transport system to form an image on the recording paper. A composite image forming apparatus, which is provided so as to be slidable in the paper feeding direction so as to abut each side edge formed to extend in a direction intersecting with the paper feeding direction of the recording paper. A pair of side edge regulating members, a plurality of detection transmission members interlocked in accordance with a moving amount of at least the one side edge regulating member, and the sheet feeding based on a moving amount of each of the plurality of detection transmitting members. The recording paper in the tray Detecting means for detecting the size of the recording paper, display means for displaying a paper size setting screen for setting the paper size of the recording paper on which an image is to be formed, and the paper supply setting screen based on the detection result of the detecting means. And control means for controlling to display a paper size of a predetermined standard of the recording paper placed on a paper tray.

Further, according to the present invention, there is provided a first mode in which an image is formed by a facsimile procedure, a second mode in which an image is formed by data from an information processing apparatus, and image information from a document reading means. A third mode of forming an image based on the recording paper is used by mode switching, and the recording paper is fed from a paper feed tray on which the recording paper is placed via a transport system to form an image on the recording paper. A composite image forming apparatus, which is provided so as to be slidable in the paper feeding direction so as to abut each side edge formed to extend in a direction intersecting with the paper feeding direction of the recording paper. A pair of side edge regulating members and an area from one side edge of the recording paper to the center line is divided into at least a first area and a second area, and the one of the divided first areas is divided into the first area and the second area. According to the amount of movement of the side edge regulating member A first detection transmission member interlocked,
A second detection transmission member that interlocks with a movement amount of the one side edge regulating member in the second region, a movement amount of the first detection transmission member, and a movement amount of the second detection transmission member. Detecting means for detecting the paper size of the recording paper based on the amount of movement; display means for displaying a paper size setting screen for setting the paper size of the recording paper on which an image is to be formed; And control means for controlling the display of the paper size of the recording paper placed on the paper feed tray on the paper size setting screen so as to display a paper size of a predetermined standard.

According to a thirty-fifth aspect of the present invention, there is provided a first mode in which an image is formed by a facsimile procedure, a second mode in which an image is formed by data from an information processing apparatus, and image information from a document reading means. A third mode of forming an image based on the recording paper is used by mode switching, and the recording paper is fed from a paper feed tray on which the recording paper is placed via a transport system to form an image on the recording paper. A composite image forming apparatus, which is provided so as to be slidable in the paper feeding direction so as to abut each side edge formed to extend in a direction intersecting with the paper feeding direction of the recording paper. A pair of side edge regulating members, and a region from one side edge of the recording paper to the center line is divided into a plurality of regions, and the amount of movement of the one side edge regulating member in each of the plurality of divided regions Depending on the multiple A detection transmission member, detection means for detecting a paper size of the recording paper based on a moving amount of each of the plurality of detection transmission members, and a paper size setting screen for setting a paper size of the recording paper on which an image is formed. Display means for displaying, and control means for controlling display of a predetermined standard paper size of the recording paper placed on the paper feed tray on the paper size setting screen based on a detection result of the detection means. And is characterized by including.

According to a thirty-sixth aspect of the present invention, there is provided a paper feed tray on which recording paper is placed, and wherein the paper feed tray is in contact with each side edge formed so as to extend in the paper feeding direction of the recording paper. And a pair of side edge regulating members slidably provided in a direction intersecting the paper direction, wherein the pair of side edge regulating members abut against each other to detect the paper size of the recording paper. A paper size detection method of the apparatus, wherein at least one of the side edge regulating members is slid to move a plurality of detection transmission members in conjunction with each other, and the amount of movement of each of the plurality of detection transmission members The paper size of the recording paper is detected based on this.

According to a thirty-seventh aspect of the present invention, a pair of side edges movably provided so as to contact the side edges of the recording paper along the paper feeding direction of a paper feeding tray on which the recording paper is placed. The movement amount of the regulating member is divided into at least two regions that are divided into at least half of the maximum movement amount, and the first detection transmission member and the second detection transmission member that cooperate in accordance with the movement amount of the side edge regulating member. It is characterized in that the two detection transmitting members correspond to the respective areas, and the paper size is detected using the paper size detecting means.

[0046]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an example of a preferred embodiment of the present invention will be specifically described with reference to the drawings.

First Embodiment (Schematic Description) First, prior to description of a paper size detecting device which is a characteristic configuration of the present invention, FIG. 1 shows the overall schematic configuration of an image forming apparatus. I will explain. FIG. 1 is a cross-sectional view illustrating an example of a schematic configuration of the image forming apparatus of the present embodiment. FIG. 2 is a schematic perspective view of the image forming apparatus.

The image forming apparatus 1 of this embodiment is a multifunction machine having a facsimile function, a copying function, and a printer function. As shown in FIG. 1, a document reading unit 10, an image writing unit 40, and an image forming unit 50 are provided. , Transfer paper transporting means 60, transfer paper discharging means 64, and transfer paper reversing means 70. Further, a fisher unit 38 for externally feeding the external paper feeding unit 81B to perform post-processing such as sorting, stapling, and punching is provided in a form externally attached to the apparatus main body 6. Note that the transfer paper of this example corresponds to the recording paper of the present invention.

The image forming apparatus 1 includes an apparatus main body 6 and
A door provided on the front surface of the device main body 6, operating means 94 and display means 90 provided on the upper surface of the device main body 6, and a plurality of, for example, 4
Paper cassette 82 (82-1, 82-2, 82-
3, 82-4).

The document reading means 10 is, for example, an image (character string, picture, etc.) described in one document X from a bundle of documents X1.
Is read as optical information based on the irradiation light of the light source, and is converted into electrical information. Generally, manuscript X
The original is placed on the platen glass 11 with its original surface facing the surface of the platen glass 11. Light source 12
B projects light onto the surface of the placed document. The light that reaches the document surface becomes light (information) including the image information, is reflected by the document surface, and reaches the mirror 13. The light source 12B and the mirror 13 are configured to be movable in the direction of the arrow AB along the surface of the platen glass 11 so as to scan the entire document surface.

In this embodiment, an automatic double-sided document feeder (RADF) 20 is provided as automatic document feeding means.
As shown in FIG. 1, the automatic double-sided document feeder 20 separates a bundle X1 of a plurality of documents X stacked on the document table 24 and sends out the bundle X1 by feeding rollers 21a and 21b. Platen glass 1 through 21c
1A. Platen glass 1
A light source 12A and a mirror 13 are provided below 1A. Thus, as described above, regarding the bundle of the plurality of originals X,
The original surface can be read continuously.

In addition, in the configuration of the automatic double-sided document transport section 20, both sides of the document X can be read. In this case, one surface is read by the light source 12A, and when the reading is completed, the document X is once sent out rightward in the drawing by the reversing roller 22 and then the reversing roller 2
2, the original X is conveyed leftward in the figure while being wound up by the roller 21c, and the other surface of the original X faces the platen glass 11A. The originals X supplied from the automatic double-sided original transport unit 20 and read by the light source 12 </ b> A are sequentially stacked on the paper discharge tray 23.

The light information on the document surface read by the light source 12A (12B) is repeatedly reflected by the mirrors 14 and 15 and reaches the CCD image pickup device 17 via the image forming optical system 16. The CCD image pickup device 17 has a photoelectric surface on which a plurality of pixels having a photoelectric conversion function are arranged, and the plurality of pixels receive optical information including image information on the document surface, and convert the optical information into electrical information. Will be.

The image writing means 40 has a function of irradiating the photosensitive drum 51 with a laser beam controlled based on the above-mentioned electrical information to form an electrostatic latent image. The electrical information including the image information obtained by converting the optical information relating to the document surface is used for controlling the laser beam oscillated from a semiconductor laser (not shown). The laser beam controlled and oscillated based on the electric information is supplied to a drive motor 41.
The laser beam is radiated onto a rotatable polygon mirror 42 whose center is connected to the photoreceptor drum 51. Here, when the polygon mirror 42 rotates while reflecting the laser beam, the laser beam is irradiated on the photosensitive drum 51 while being scanned in the axial direction. The irradiation of the laser beam causes the photosensitive drum 5
1, an electrostatic latent image based on the electrical information is formed.

The image forming means 50 includes the photosensitive drum 5
1 has a function of forming an image on the transfer paper Y based on the electrostatic latent image formed on the transfer paper Y. As described above, an electrostatic latent image is formed on the photoconductor drum 51 by the irradiation of the laser beam. As a prerequisite operation, the entire surface of the photoconductor drum 51 is uniformly charged by the charging unit 52. The developing unit 53 makes charged toner particles adhere to the electrostatic latent image and visualizes the toner particles. The transfer unit 54 transfers and attaches the toner particles to the separately fed transfer paper Y surface, and forms a toner image on the transfer paper Y surface.

The separation unit 5 is located on the photosensitive drum 51.
5 separates the transfer paper Y adsorbed on the photosensitive drum 51,
After the transfer, the cleaning unit 56 cleans the toner remaining on the photoreceptor drum 51 to reveal a clean surface.
To form an electrostatic latent image by laser beam irradiation. On the other hand, the transfer paper Y is sent to the pressure bonding section 58. The pressing portion 58 applies heat and pressure to the transfer paper Y by the heat rollers 59a and 59b, and presses the transferred toner image to form an image. Thereafter, the transfer paper Y is discharged to the fisher unit 36 outside the apparatus via a plurality of rollers provided in the transfer paper discharge means 64 which is a discharge means. At this point, "copying" of the image on the original surface onto the transfer paper Y surface is completed.

The above discharge can be performed by inverting the transfer sheet Y. In this case, the transfer of the toner image from the photosensitive drum 51 to the transfer paper Y is performed on the other surface in addition to the one surface. That is,
The transfer paper Y that has been subjected to single-sided copying is conveyed to the transfer paper reversing means 70. The guide unit 71 switches the transfer path of the transfer sheet Y with respect to the transfer sheet reversing unit 70 and the transfer sheet discharging unit 64. When the guide section 71 is switched so as to convey the transfer sheet Y to the upper right in the drawing, the transfer sheet Y is carried out to the reversing section 73 via the reversing roller 72. Next, in a state where the transfer paper Y is sent out to the reversing section 73 by a predetermined amount, the reversing roller 76 is reversed, and the transfer paper Y is transported to the reversal conveyance path 74.
Conveyed to. Thereafter, the transfer paper Y passes through the path 74 and reaches the upstream side of the photosensitive drum 51 again. At this time, the surface of the transfer paper Y facing the surface of the photosensitive drum 51 is different from the surface transferred before passing through the transfer paper reversing means 70. Generally, when an image is actually formed on the inverted transfer paper Y, new image information is written on the photosensitive drum 51 by the image writing unit 40.

The transfer paper transfer means 60 as a transfer means has a function of transferring the transfer paper Y to the photosensitive drum 51 of the image forming means 50. The transfer paper Y is stored in a plurality of, for example, four paper feed cassettes (storage means) 82 (8 in the figure).
2-1, 82-2, and 82-3.82-4) are stacked and placed on a tray 84 provided in each of the four paper cassettes. These paper feed cassettes 82 can be accommodated in the apparatus main body when transferring the transfer paper Y to the image forming unit 50, and can be pulled out from the apparatus main body when refilling the transfer paper Y. Also, the paper feed cassettes 82-1, 82-2,
The transfer papers P of different sizes such as “A4” for the first paper cassette 82-1 and “A3” for the second paper cassette 82-2, for example, for each of 82-3 and 82-4. Can be stored correspondingly.

In such a state, for example, if the size of the transfer paper Y or the paper type is specified at the time of copying, the corresponding tray 84 in the paper feed cassette 82 is pushed upward in the drawing. As a result, the transfer paper Y surface comes into contact with the peripheral surface of the delivery roller 62, and the transfer paper Y is
Sent from. Thereafter, the transfer sheet Y is conveyed toward the image forming unit 50 by a configuration such as a plurality of conveying rollers shown in FIG.

The transfer paper Y is not transported from the paper cassette 82 to the photosensitive drum 51 without interruption.
Generally, a transport control condition is set between the sheet cassette 82 and the photosensitive drum 51 such that the transfer sheet Y temporarily waits for a predetermined interval (PPM interval). This is because it is necessary to adjust the preceding transfer paper Y and the succeeding transfer paper Y when performing continuous copying.

In this embodiment, the sheet cassette 82
In addition, as means for feeding the transfer paper Y, as shown in FIG. 1, a manual feed tray 81A and an external paper feed means 81B (so-called LCT) capable of storing a large amount of transfer paper Y in advance. Are provided. According to the former, it is possible to cope with a case where image formation is specially performed on special transfer paper, OHP, or the like, and in the latter, continuous image formation can be performed on a large amount of transfer paper Y.

Here, the transfer paper conveying means 60, the post-copy inversion means 70, the image forming means 50, and the transfer paper discharge means 64
Constitutes a "transfer paper transport system" as a whole, and FIG.
As shown in FIG. 1, a plurality of transport rollers and the like, and a drive source (not shown) for rotating these transport rollers and the like are provided.

(Characteristic Configuration of the Present Invention) Here, the characteristics of the present invention, that is, the specific configuration of the paper size detecting apparatus 100 will be described with reference to FIGS.

As shown in FIG. 2, the paper size detecting apparatus 100 of this embodiment is configured to detect the size of paper placed on, for example, the manual feed tray 100.
, A pair of side edge regulating members 102A, 102B
Are brought into contact with the end faces in the width direction of the paper to detect the paper size.

More specifically, the paper size detecting device 10 of this embodiment
0, as shown in FIGS. 4 and 7, for example, a side edge regulating member 102A abutting on one end face in the width direction of the paper, and the side edge regulating member 102A is connected to a region 1 (first region) along the width direction. 1), the first crank 110 serving as a first detection transmission member (detection transmission member) that slides within the region, and the side edge regulating member 102A are moved along a width direction into a region 2 (a second region). ), A second crank 120 that is a second detection transmission member (detection transmission member) that slides between
Detecting means for detecting the paper size, paper size detecting means, rotary resistor 130 serving as a rotary size detecting means based on the movement amount of the crank 110 and the movement amount of the second crank 120, Area detection means 1 for detecting whether the member 102A is in the area 1 or the area 2
The first and second cranks 32 and 32 use the first crank 110 when the side edge regulating member 102A is located in the area 1, and use the second crank 120 when the side edge regulating member 102A is located in the area 2. 2 cranks 110, 120 (first and second cranks)
Switching mechanism 140 for switching the operation of the detection transmission member), and switching control means 162 for performing switching control of the switching mechanism 140 based on the area detection by the area detecting means 132. It is configured.

The switching control means 162 may be provided in the control means 160 for controlling the entire image forming apparatus.
They may be provided independently. Further, the paper size detecting means and the area detecting means may constitute the detecting means of the present invention.

Further, the paper size detecting device 100 further includes, for example, the other side edge regulating member 102B abutting on the other end surface in the width direction of the paper, and the one side edge regulating member 10B.
An interlocking mechanism 150 for causing the other side edge regulating member 102B to interlock and slide rearward (forward) with the forward (rearward) slide movement of 2A;
It is comprised including.

Thus, one side edge regulating member 102A
Slides in the area 1 on one side, the other side edge regulating member 102B also slides in the area 1 on the other side,
When one of the side edge regulating members 102A slides in the one side region 2, the other side edge regulating member 102B also slides in the other region 2 so that each side edge regulating member 1
02A and 102B are both side edge regulating members 102A and 102A.
It moves symmetrically about the center line that bisects the distance between 02B.

For this reason, even if there is only one rotary resistor 130 in one area, the one side area between the one side edge regulating member 102A and the center line can be used. By detecting the length and doubling the detection result, the entire size of the paper can be detected.

As shown in FIG. 4, the first crank 110 has a contact portion 114 that contacts the side edge regulating member 102A within the range of the region 1, and is connected to the contact portion 114.
A guide member 112 for guiding the rotary resistor 130 to rotate as the side edge regulating member 102A slides.
And is comprised.

As shown in FIG. 4, the second crank 120 has a contact portion 124 in contact with the side edge regulating member 102A within the range of the region 2, and is connected to the contact portion 124.
A guide member 122 that guides the rotary resistor 130 to rotate as the side edge regulating member 102A slides.
And is comprised.

In addition, in this example, when the first crank 110 moves as described above, the rotary resistor 13
0 rotates clockwise, and the rotary resistor 130 rotates counterclockwise when the second crank 120 moves.
One rotary resistor 130 can be used as both a detecting means for detecting the paper size when 02A is present and a detecting means for detecting the paper size when the side edge regulating member is present in the area 2.

Also, due to such a feature, when the detection in the area 1 is performed, the rotation type resistor 130 is turned from 0 degree to 3 degrees.
Even when the detection is performed in the area 2 up to 60 degrees and the detection is performed from 0 degrees to 360 degrees of the rotary resistor, the areas 1 and 2 are combined as in the related art. The detection accuracy (about twice) can be improved as compared with the case where 0 to 360 degrees is to be detected.

Further, since the area 1 is a usable range (compensation range) as shown in FIG.
By setting 30 degrees and the area 2 from 30 degrees to 330 degrees, a setting that avoids the non-usable angle can be performed, and even if this setting is performed, the accuracy does not decrease.

That is, as shown in FIG. 6, conventionally, by using the (linear) compensation range of the rotary resistor used for the movement amount from the maximum size to the minimum size to be detected, detection resolution cannot be obtained. Wrong size detection occurred. On the other hand, in the present example, the regions 1 and 2 where the movement amount is divided in half are provided, and the linear compensation range of one rotary resistor is used for each. Since resolution can be increased, troubles such as erroneous size detection can be avoided.

In this example, as described above, the interlocking mechanism 1
Although the rotary resistor 130 serving as the paper size detecting means is used on one side and the other side because the 50 is used, the rotary resistor 130 may be formed on each of the one side and the other side. In other words, two paper size detection devices may be provided. In this case, switching control means are provided respectively.

Further, in the present embodiment, an example in which the paper size detecting means is provided on one side is disclosed, but it may be provided only on the other side.

Further, in this embodiment, one side is divided into the area 1 and the area 2 to improve the accuracy, but one side is divided into the areas 1 to 2N (N = 1, 2, 3,...). , Or a plurality of regions 1 to N, and one of the divided blocks may be detected by one rotary resistor.

In the case of two divisions, the rotary resistor is 1
In the case of 3 divisions, there are two rotary resistors, in the case of 4 divisions, there are 2 rotary resistors, in the case of 5 divisions, there are 3 rotary resistors, and in the case of 6 divisions, Three rotating resistors,
·become that way.

Further, each of the regions 1 and 2 may have a rotary resistor.

(Regarding Control System) Next, the configuration of the overall control system of the image forming apparatus in which the paper size detecting means included in the above-described paper size detecting device is mounted on a manual feed tray or each paper feed tray will be described. 8 will be described. FIG.
3 is a functional block diagram illustrating a configuration of a control system of the image forming apparatus of the present example.

As shown in FIG. 1, the image forming apparatus 1 of this embodiment has a rotary type included in a paper size detecting device having the same configuration as described above for detecting the size of paper placed on the manual feed tray 100 described above. The resistor 130, the paper size detecting means 172-1 included in the above-described paper size detecting device for detecting the paper vertical width size of the paper feed tray 82-1 and the paper width of the paper feed tray 82-1. Paper size detecting means 174-1 for detecting the size, and paper size detecting means 172-2 for detecting the size of the paper vertical width of the paper feed tray 82-2.
Paper size detecting means 174-1 for detecting the width of the paper width of the paper feed tray 82-2;
3, a paper size detecting means 172-3 for detecting the size of the paper vertical width, a paper size detecting means 174-3 for detecting the width of the paper width of the paper feeding tray 82-3, and a paper feeding tray 82. Paper size detecting means 172-4 for detecting the size of the paper vertical width of -4, and the paper size detecting means 174-4 for detecting the width of the paper width of the paper feed tray 82-4.
And is comprised.

In this example, since a plurality of paper cassettes, for example, four paper cassettes are formed, four paper size detecting means are also formed. Further, one paper cassette has a paper width detecting device for detecting the vertical width of the paper in the paper feeding tray and a paper width detecting device, so that a total of two paper size detecting means are required. 8 paper size detecting means are formed only for the printer. of course,
Eight paper size detection devices are also formed.

Further, as shown in FIG. 8, the image forming apparatus 1 according to the present embodiment includes, for example, a communication unit 3 for performing communication in accordance with a predetermined facsimile communication procedure, decoding and expanding received image information upon reception, and Encoding / decoding means 4 for compressing and encoding document image information; document reading means 10 comprising a predetermined optical system for reading a document image; image information read by document reading means 10; An image storage means 32 for storing image information received by the image processing means, and an image processing means for performing predetermined processing (magnification processing, image superposition processing, etc.) on the received or read image information and storing the processed image information in the image storage means 32 34, an image forming unit 50 for forming an image on transfer paper as a recording medium, a large number of keys (numerical keys) for setting various modes and inputting a telephone number of a communication destination, a start button, etc. Operation means 94 to perform the operation with
A display unit 90 for displaying a paper size setting screen 91 for setting and inputting a paper size in, for example, a copy mode using an LCD touch panel, and screen data of a screen displayed on the display unit 90. Screen data storage means 93, and display control means 9 for controlling display of the display means 90 based on the screen data storage means 93
2, transfer paper transporting means 60 for transporting the transfer paper in the paper feed cassette in conjunction with the operation of the image forming means 50, the above-described image writing means 40, transfer paper discharging means 64, and post-copy inversion means 70 And control means 160 for controlling each component such as in accordance with a predetermined control program.

The operation means 94 has a touch panel for accepting an operation and a display means 90 comprising an LCD for displaying patterns and characters superposed on each other, and is operated by pressing the touch panel at a position displayed on the LCD. Display operation unit, one-touch keys for one-touch dialing for executing one-touch transmission and broadcast communication, ten-keys “0” to “9”, “*” key, “#” key, and the like. Key buttons for telephone number input, check button, help button, application button, reset button, stop /
It has a clear button, an interrupt copy button, a start button, a copy function, a facsimile function, and a mode change key for switching a printer function. As a result, when the paper size setting screen 91 described later is displayed on the display unit 90, the operation unit 94 can set a desired document size (AB system and inch system).

Note that the image forming apparatus can also be configured with a configuration in which only the copy function is extracted in the image forming apparatus 1 which is a multifunction peripheral.

The facsimile communication means 3 is a network control device for making a call to and from a public network such as NTT, and for controlling connection such as incoming call, recovery, disconnection processing and the like from an unspecified number of other parties. Network control unit), demodulates the modulated signal transmitted by the public network at the time of reception, converts it into a digital received image, modulates the original image information to match the frequency band of the public network at the time of transmission, and modulates it into a modulated signal It has a communication modem to convert.

The image processing means 34 converts the digital image signal read by the document reading means 10 or the digital image signal received by the facsimile communication means 3 by a scaling circuit and a density correction circuit as necessary. After performing the preprocessing, the image is compressed by the compression / expansion circuit and stored in the image storage unit 32. Then, the stored image is read out, decompressed by a compression / decompression circuit,
Output to 0.

The image storage means 32 comprises a copy area, a facsimile area, and a nonvolatile memory containing image data such as font bitmap data for each country.

The control means 160 has a function of managing and controlling the state of each component of the multifunction peripheral and controlling the image formation by the image forming means 50 based on the size input on the paper size setting screen 91. .

In addition, the control unit 160 includes an image control unit for controlling the image processing unit 134 and the image forming unit 5.
Printer control unit and operation means 9 for performing drive control
And a communication control unit (data processing unit, data communication control unit) for controlling the communication unit 3 and the like.

In addition, the control means 160 includes a transfer paper discharge means 64, a transfer paper transport means 60, and a post-copy inversion means 7
0. Controls the operation of the conveyance system such as the automatic double-sided document conveyance means 20.

Further, it is possible to form an image on a transfer sheet having an area larger than that of a transfer sheet having a so-called standard size. Here, "standard size"
For example, A4, A3, B4, B5, etc., sizes conforming to Japanese standards, 8.5 × 11 inch, 11 × 17 inch, etc.
Generally, it means both the size that is fixed in foreign countries. In the latter case, it may be particularly referred to as a “standard special size”.

In addition to this, while setting the original size, for example, what magnification should be applied when an original image is formed on the transfer paper P, or the paper type (plain paper, thick paper, colored paper, OHP, etc.)
Alternatively, it may be configured such that conditions such as “image formation on both sides” or “single side” image formation of transfer paper can be set. In this case, before executing the copying, these various conditions are set to arbitrary and desired ones, the “bundle of conditions” is determined, and an image is formed by applying the determined bundle of conditions. become. Also, a plurality of such bundles of conditions are defined as one unit, and this is referred to as “JOB”.
May be provided as a function of temporarily storing as.

(Regarding Display Screen) Next, a display screen for setting a paper size in the image forming apparatus 1 of this embodiment will be described with reference to FIG. FIG. 9 shows a display unit 90.
9 shows a paper size setting screen 91 displayed in the section of FIG.

On this screen, for example, in addition to the sizes such as A4 size and B4 size defined in Japanese Industrial Standards,
Each operation unit is formed so that inch type paper can be selected.

When the copy function is selected by the mode change key to display a menu screen, a paper size setting screen 91 is displayed. Alternatively, for example, a selection key (not shown) such as “document size setting” provided on the menu screen may be pressed to transit to the paper size setting screen 91.

[0098] The paper size setting screen 91 displayed in this manner includes buttons 91, such as A3, A4, B3, B4, B5, etc., of a standard size according to the Japanese standard.
d to 91h, and buttons 91a to 91c of sizes 8.5 × 11 inch, 8.5 × 14 inch, 11 × 17 inch, etc., which are generally fixed in foreign countries and the like, are formed.

As described above, in the image forming apparatus of this embodiment, A
In this case, the paper size can be detected with high accuracy. In this case, the A size and the inch size can be selected. And can be identified.

(Image Forming Process) Next, the image forming process of the image forming apparatus 1 having the above configuration will be described with reference to FIG.

First, in the image forming apparatus 1, the user operates the operation unit 94 and the display unit 90 to set, for example, a copy mode and set a document.

Here, in this example, the above-described rotary resistor 1
30, 172-1, 174-1, 172-2, 174-
2, 172-3, 174-3, 172-4, 174-4
Therefore, even if inch-type paper is set in a manual feed tray or a paper feed cassette, it can be identified.

Then, a paper size setting screen 91 as shown in FIG. 9 is displayed on the display means 90, and the user selects a desired size irrespective of the inch system or the AB system.

Next, when the user presses the start button or the like of the operation means 110, copying starts.

For example, as shown in FIG. 1, typically, a document is placed directly on the platen glass 11B to perform copying, or a plurality of documents are transferred from the automatic double-sided document conveying means 20. In the case of performing continuous copying by supplying the original to the platen glass 11B, a document may be placed on the manual feed tray 101 or the like.

At this time, as shown in the sectional view of FIG. 1, the transfer paper Y fed from the paper bundle Y1 of the paper feed cassette 82-1 is transported via the transport roller 62 of the transfer paper transport means 60. Then, an image is formed by the image forming unit 50 and is discharged outside the apparatus by a plurality of rollers of the transfer sheet discharging unit 64. Or, in the case of double-sided copy,
When an image is formed on one side by the image forming unit 50, the image is guided by the reversing unit 70 after copying, and is carried out to the reversing unit 73 via the reversing roller 72. Next, in a state where the transfer paper Y is sent out to the reversing unit 73 by a predetermined amount, the reversing conveyance path 7
To 4. Thereafter, the transfer paper Y passes through the path 74 and reaches the upstream side of the photosensitive drum 51 again. Similarly, the transfer paper is discharged outside the apparatus by the transfer paper discharge means 64.

On the other hand, a bundle X1 of a plurality of originals X stacked on the original placing table 24 is separated, sent out by feed rollers 21a and 21b, and
Through the platen glass 11A.

As a result, the size in inches or A
The copying of the B size is completed.

As described above, according to the present embodiment, the first
When the second crank moves, the rotary resistor rotates clockwise, and when the second crank moves, the rotary resistor rotates counterclockwise. One rotary resistor can be used for both the detecting means for detecting the paper size when the side edge regulating member is provided in the area and the detecting means for detecting the paper size when the side edge regulating member is present in the area 2. .

Also, due to such a feature, when the detection in the area 1 is performed, the rotary resistor is set to be detected from 0 to 360 degrees, and when the detection in the area 2 is performed,
Since the detection target is from 0 ° to 360 ° of the rotary resistor, compared to the case where the detection target is from 0 ° to 360 ° in combination of the area 1 and the area 2 as in the related art,
The detection accuracy (about double) can be increased.

Further, by providing regions 1 and 2 in which the amount of movement is divided in half and using the linear compensation range of one rotary resistor for each, high resolution can be achieved with an inexpensive rotary resistor. Since it can be realized, troubles such as erroneous size detection can be avoided.

In this example, since the interlocking mechanism is used as described above, the rotary resistor serving as the paper size detecting means can be used for one side and the other side.

Further, the present embodiment can be used, for example, for detecting the paper width size of the manual feed tray in the paper feeding direction, and for detecting the paper width and width of the paper feeding tray.

[Second Embodiment] Next, a second embodiment according to the present invention will be described with reference to FIG. In the following, description of substantially the same configuration of the first embodiment will be omitted, and only different portions will be described. FIG. 10 is a perspective view showing an outline of the paper size detecting device of the present example.

In the above-described first embodiment, the paper size detection device is mainly formed on the manual feed tray. However, in the present embodiment, the paper size detection device is formed on the paper feed cassette.

In the paper size detecting apparatus of this embodiment, FIG.
As shown in FIG. 0, the length of the paper is detected by side edge regulating members 84A and 84B formed at both ends of the sheet bundle Y of the sheet cassette 80, and the paper is detected by the side edge regulating members 85A and 85B. Is configured to detect the size of the horizontal width. In addition,
Other cranks, rotary resistors, interlocking mechanisms, and other control systems have the same configuration as in the first embodiment, and a detailed description thereof will be omitted.

As described above, according to this embodiment, the same operation and effects as those of the first embodiment can be obtained, but it can be applied to various paper size detection other than the manual feed tray. .

Although the apparatus and method according to the present invention have been described according to some specific embodiments thereof,
Those skilled in the art can make various modifications to the embodiments described in the text of the present invention without departing from the spirit and scope of the present invention. For example, in each of the above-described embodiments, for example, in some of the above-described embodiments, a copy device has been described as an example. However, for example, an image created on a word processor of a personal computer is printed on transfer paper. The present invention can be easily applied to a printer that performs printing, a facsimile that prints an image transmitted via a communication line, or the like.

The present invention is also applicable to a so-called "multifunction machine" in which all functions such as the printer and facsimile described above are provided in one apparatus. Exactly the same is possible.

Further, it is needless to say that the embodiments described above and examples in which these embodiments are combined with the modifications are also included.

[0121]

As described above, according to the present invention, regions 1 and 2 are provided in which the amount of movement from the maximum size to be detected to the minimum size is halved, and one rotary resistor is provided for each. By using the linear compensation range, high resolution can be realized with an inexpensive rotary resistor, and troubles such as erroneous size detection can be avoided.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an example of a schematic configuration of the entire image forming apparatus of the present invention.

FIG. 2 is a perspective view illustrating a portion of a manual feed tray of the image forming apparatus of FIG. 1; .

FIG. 3 is a plan view showing the manual feed tray of FIG. 2;

FIG. 4 is an explanatory diagram illustrating an example of a schematic configuration of a paper size detection device according to the present invention.

FIG. 5 is an explanatory diagram for explaining a usable range of a rotary resistor in the paper size detecting device of FIG. 4;

FIG. 6 is an explanatory diagram for explaining a usable range of a rotary resistor in a paper size detecting device.

FIG. 7 is a functional block diagram showing a configuration of a control system of the paper size detecting device of FIG.

FIG. 8 is a functional block diagram illustrating a configuration of an entire control system of the image forming apparatus including the paper size detecting device of the present invention.

FIG. 9 is an explanatory diagram illustrating an example of a paper size setting screen displayed on the touch panel of the image forming apparatus in FIG. 8;

FIG. 10 is an explanatory diagram showing an example of another embodiment of the paper size detecting device of the present invention.

FIG. 11 is an explanatory view schematically showing a conventional paper size detecting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image forming apparatus 90 Display means 100 Paper size detection apparatus 102A, 102B Side edge regulating member 110 First crank 120 Second crank 130 Rotary resistor (paper size detection means) 140 Switching mechanism 160 Control means

Claims (37)

[Claims] 1. A paper feed tray on which recording paper is placed, and a slide in a direction intersecting with the paper feed direction so as to abut each side edge formed to extend in the paper feed direction of the recording paper. And a pair of side edge regulating members movably provided, wherein the sheet size detecting device detects the paper size of the recording paper by bringing the pair of side edge regulating members into contact with each other. A plurality of detection transmission members interlocked in accordance with the amount of movement of the side edge regulating member, and detection means for detecting the paper size of the recording paper based on the amount of movement of each of the plurality of detection transmission members. A paper size detection device characterized by including: 2. A paper feed tray on which recording paper is placed, and interlocked with each other in a direction intersecting with the paper feeding direction so as to abut each side edge formed to extend in the paper feeding direction of the recording paper. And a pair of side edge regulating members provided so as to be slidable, and a paper size detecting device that detects the paper size of the recording paper by bringing the pair of side edge regulating members into contact with each other, An area from one side edge of the recording paper to the center line is divided into at least a first area and a second area, and the movement amount of the one side edge regulating member in the divided first area is determined. A first detection transmission member interlocked with the first detection transmission member, a second detection transmission member interlocked with a movement amount of the one side edge regulating member in the second region, and a first detection transmission member. The sheet of the recording paper is determined based on a movement amount and a movement amount of the second detection transmission member. Sheet size detecting apparatus comprising detection means for detecting the size, the. 3. A paper feed tray on which recording paper is placed, and interlocked with each other in a direction intersecting with the paper feeding direction so as to abut each side edge extending in the paper feeding direction of the recording paper. And a pair of side edge regulating members provided so as to be slidable, and a paper size detecting device that detects the paper size of the recording paper by bringing the pair of side edge regulating members into contact with each other, The area from one side edge to the center line of the recording paper is divided into a plurality of areas, and a plurality of areas interlocked with each other according to the amount of movement of the one side edge regulating member in each of the plurality of divided areas. A paper size detection device comprising: a detection transmission member; and a detection unit configured to detect a paper size of the recording paper based on a movement amount of each of the plurality of detection transmission members. 4. A manual feed tray on which recording paper is placed, and a sliding movement in a direction intersecting with the paper feeding direction so as to abut each side edge formed to extend in the paper feeding direction of the recording paper. And a pair of side edge regulating members provided so as to detect the paper size of the recording paper by bringing the pair of side edge regulating members into contact with each other. A plurality of detection transmission members that are linked in accordance with the amount of movement of the side edge regulating member; and detection means for detecting the paper size of the recording paper based on the amount of movement of each of the plurality of detection transmission members. A paper size detection device, characterized in that: 5. A manual feed tray on which recording paper is placed, and interlocked with each other in a direction intersecting with the paper feeding direction so as to abut each side edge formed to extend in the paper feeding direction of the recording paper. A pair of side edge regulating members provided so as to be slidable, and wherein the pair of side edge regulating members abut against each other to detect the paper size of the recording paper, An area from one side edge of the recording paper to the center line is divided into at least a first area and a second area, and the one side edge regulating member moves in the divided first area according to the moving amount. A first detection transmission member that operates in conjunction with the first detection transmission member; a second detection transmission member that operates in accordance with the amount of movement of the one side edge regulating member in the second region; and movement of the first detection transmission member. Amount of the recording paper based on the amount of movement of the second detection transmitting member and the amount of movement of the second detection transmitting member. Sheet size detecting apparatus comprising detection means for detecting the size, the. 6. A manual feed tray on which recording paper is placed, and interlocked with each other in a direction intersecting with the paper feeding direction so as to abut each side edge formed to extend in the paper feeding direction of the recording paper. A pair of side edge regulating members provided so as to be slidable, and wherein the pair of side edge regulating members abut against each other to detect the paper size of the recording paper, The area from one side edge of the recording paper to the center line is divided into a plurality of areas, and each of the plurality of areas interlocked in accordance with the amount of movement of the one side edge regulating member in each of the plurality of divided areas. A paper size detection device, comprising: a detection transmission member; and detection means for detecting a paper size of the recording paper based on a movement amount of each of the plurality of detection transmission members. 7. A paper feed tray on which recording paper is placed, and a slide in the paper feed direction so as to abut each side edge formed to extend in a direction intersecting the paper feed direction of the recording paper. And a pair of side edge regulating members movably provided, wherein the sheet size detecting device detects the paper size of the recording paper by bringing the pair of side edge regulating members into contact with each other. A plurality of detection transmission members interlocked in accordance with the amount of movement of the side edge regulating member, and detection means for detecting the paper size of the recording paper based on the amount of movement of each of the plurality of detection transmission members. A paper size detection device characterized by including: 8. A paper feed tray on which recording paper is placed, and a slide in the paper feed direction so as to abut each side edge formed to extend in a direction intersecting the paper feed direction of the recording paper. A pair of side edge regulating members movably provided; and a sheet size detection device for detecting the paper size of the recording sheet by bringing the pair of side edge regulating members into contact with each other, wherein the recording sheet The area from one side edge to the center line is divided into at least a first area and a second area, and interlocked according to the amount of movement of the one side edge regulating member in the divided first area. A first detection transmission member, a second detection transmission member interlocked in accordance with a movement amount of the one side edge regulating member in the second region, and a movement amount of the first detection transmission member. The size of the recording paper based on the amount of movement of the second detection transmitting member. Sheet size detecting apparatus comprising detection means for output, the. 9. A paper feed tray on which recording paper is placed, and a slide in the paper feed direction so as to abut each side edge formed to extend in a direction intersecting the paper feed direction of the recording paper. A pair of side edge regulating members movably provided; and a sheet size detection device for detecting the paper size of the recording sheet by bringing the pair of side edge regulating members into contact with each other, wherein the recording sheet The area from one side edge to the center line is divided into a plurality of areas, and a plurality of detection transmissions respectively linked in accordance with the amount of movement of the one side edge regulating member in each of the plurality of divided areas. A paper size detection device, comprising: a member; and detection means for detecting a paper size of the recording paper based on a movement amount of each of the plurality of detection transmission members. 10. The detecting means according to claim 1, wherein said first detection transmission member slides in one direction and rotates counterclockwise, and said second detection transmission member slides in one direction and rotates clockwise. The paper size detecting device according to any one of claims 2, 5, and 8, wherein the rotating device is a rotating type size detecting unit that rotates. 11. A switching means for switching between movement of the first detection transmission member and movement of the second detection transmission member in accordance with the amount of movement of the one side edge regulating member. The paper size detection device according to any one of claims 2, 5, and 8. 12. The apparatus according to claim 2, wherein said detecting means includes an area detecting means for determining which of said first and second areas the one side edge regulating member is located in. The paper size detecting device according to claim 5. 13. The apparatus according to claim 1, wherein said detecting means includes an area detecting means for determining which one of the plurality of areas the one side edge regulating member is located in. The paper size detecting device according to any one of claims 4, 6, 7, and 9. 14. A paper size detecting device for detecting a paper size of a recording paper placed on a paper feed tray, wherein a moving amount from a detectable maximum size to a minimum size is determined by at least two first and second movement amounts. Divided into the first and second areas
A paper size detecting device, wherein a compensation range of at least one detecting means is assigned to the region of (1). 15. A paper size detecting device for detecting a paper size of a recording paper placed on a paper feed tray, wherein a moving amount from a maximum detectable size to a minimum size is divided into a plurality of areas, A paper size detecting device, wherein a compensation range of at least one detecting means is assigned to an area. 16. A paper size detection device for detecting a paper size of a recording paper placed on a manual feed tray, wherein a movement amount from a maximum detectable size to a minimum size is determined by at least two first and second movement amounts. Divided into regions, each of the first and second
A paper size detecting device, wherein a compensation range of at least one detecting means is assigned to the region of (1). 17. A paper size detecting device for detecting a paper size of a recording paper placed on a manual feed tray, wherein a moving amount from a maximum detectable size to a minimum size is divided into a plurality of regions, A paper size detecting device, wherein a compensation range of at least one detecting means is allocated to the paper size detecting device. 18. An image forming apparatus for feeding the recording paper from a paper feed tray on which the recording paper is placed via a transport system and forming an image on the recording paper, wherein the recording paper feeding direction A pair of side edge regulating members provided slidably in a direction intersecting with the paper feeding direction so as to abut against each side edge formed to extend from the at least one side edge regulating member. A plurality of detection transmission members that are linked in accordance with a movement amount; a detection unit that detects a paper size of the recording paper in the paper feed tray based on a movement amount of each of the plurality of detection transmission members; Display means for displaying a paper size setting screen for setting the paper size of the recording paper; and the recording paper placed on the paper feed tray on the paper size setting screen based on the detection result of the detecting means. The paper size of the specified standard An image forming apparatus comprising: the control means for controlled so, the. 19. An image forming apparatus which feeds the recording paper from a paper feed tray on which the recording paper is placed via a transport system and forms an image on the recording paper, wherein the paper feeding direction of the recording paper is provided. A pair of side edge regulating members slidably provided in an intersecting manner in the direction intersecting with the paper feeding direction so as to abut against the respective side edges formed so as to extend, A region from the side edge to the center line is divided into at least a first region and a second region, and the first region interlocked according to the amount of movement of the one side edge regulating member in the divided first region. A second detection transmission member interlocked in accordance with a movement amount of the one side edge regulating member in the second region; a movement amount of the first detection transmission member; 2 based on the amount of movement of the detection transmission member, Detecting means for detecting the size of the recording paper, display means for displaying a paper size setting screen for setting the paper size of the recording paper on which an image is to be formed, and the paper supply setting screen based on the detection result of the detecting means. An image forming apparatus comprising: a control unit configured to perform control so as to display a paper size of a predetermined standard of the recording paper placed on a paper tray. 20. An image forming apparatus which feeds the recording paper from a paper feed tray on which the recording paper is placed via a conveyance system and forms an image on the recording paper, wherein the paper feeding direction of the recording paper is provided. A pair of side edge regulating members slidably provided in an intersecting manner in the direction intersecting with the paper feeding direction so as to abut against the respective side edges formed so as to extend, Dividing the area from the side edge to the center line into a plurality of areas, and a plurality of each detection transmission member interlocked according to the movement amount of the one side edge regulating member in each of the plurality of divided areas, A detecting means for detecting a paper size of the recording paper in the paper feed tray and a paper size setting screen for setting a paper size of the recording paper on which an image is to be formed are displayed based on a moving amount of each of the plurality of detection transmitting members. Display means for performing the detection, and the detection result of the detection means Based, on the paper size setting screen, the image forming apparatus characterized by comprising a control means for controlling to display the paper size of a given standard of the recording paper placed on the paper feed tray. 21. An image forming apparatus which feeds the recording paper from a manual feed tray on which the recording paper is placed via a conveyance system and forms an image on the recording paper, wherein the recording paper is fed in a feeding direction of the recording paper. A pair of side edge regulating members slidably provided in a direction intersecting with the sheet feeding direction so as to abut against the respective side edges formed to extend, and movement of at least the one side edge regulating member A plurality of detection transmission members interlocked according to the amount; a detection unit for detecting a paper size of the recording paper in the manual feed tray based on a movement amount of each of the plurality of detection transmission members; Display means for displaying a paper size setting screen for setting the paper size of the recording paper; and a predetermined standard for the recording paper placed on the manual feed tray on the paper size setting screen based on a detection result of the detecting means. Table paper size An image forming apparatus comprising a control means for controlling to, the. 22. An image forming apparatus for feeding the recording paper from a manual feed tray on which the recording paper is placed via a conveyance system to form an image on the recording paper, wherein the recording paper is fed in a paper feeding direction. A pair of side edge regulating members slidably provided in a direction intersecting with the sheet feeding direction so as to abut against the respective side edges formed to extend, and one side of the recording sheet; A region from the edge to the center line is divided into at least a first region and a second region, and the first region interlocked according to the amount of movement of the one side edge regulating member in the divided first region. A detection transmission member, a second detection transmission member interlocked according to a movement amount of the one side edge regulating member in the second region, a movement amount of the first detection transmission member, The amount of movement of the detection transmitting member Detecting means for detecting a paper size; display means for displaying a paper size setting screen for setting the paper size of the recording paper on which an image is to be formed; and, on the paper size setting screen, Control means for controlling so as to display a paper size of a predetermined standard of the recording paper placed on the manual feed tray. 23. An image forming apparatus for feeding the recording paper from a manual feed tray on which the recording paper is placed via a transport system to form an image on the recording paper, wherein the recording paper is fed in a paper feeding direction. A pair of side edge regulating members slidably provided in a direction intersecting with the sheet feeding direction so as to abut against the respective side edges formed to extend, and one side of the recording sheet; Dividing a region from the edge to the center line into a plurality of regions, a plurality of detection transmitting members each interlocking with each other in accordance with a movement amount of the one side edge regulating member in each of the plurality of divided regions; Detecting means for detecting the paper size of the recording paper in the manual feed tray based on the amount of movement of each of the detection transmitting members, and a paper size setting screen for setting the paper size of the recording paper for forming an image. Display means; An image forming apparatus comprising: a control unit configured to display, based on a result, a paper size of a predetermined standard of the recording paper placed on the manual feed tray on the paper size setting screen. . 24. An image forming apparatus which feeds the recording paper from a paper feed tray on which the recording paper is placed via a transport system and forms an image on the recording paper, wherein the paper feeding direction of the recording paper A pair of side edge regulating members provided slidably in the paper feeding direction so as to abut against respective side edges formed to extend in a direction intersecting with at least one of the one side edge regulating members. A plurality of detection transmission members that are linked in accordance with a movement amount; a detection unit that detects a paper size of the recording paper in the paper feed tray based on a movement amount of each of the plurality of detection transmission members; Display means for displaying a paper size setting screen for setting the paper size of the recording paper; and the recording paper placed on the paper feed tray on the paper size setting screen based on the detection result of the detecting means. The paper size of the specified standard An image forming apparatus comprising: the control means for controlled so, the. 25. An image forming apparatus which feeds the recording paper from a paper feed tray on which the recording paper is placed via a transport system and forms an image on the recording paper, wherein the paper feeding direction of the recording paper A pair of side edge regulating members slidably provided in the paper feeding direction so as to abut against respective side edges formed to extend in a direction intersecting with the recording paper; A first detection transmission that divides an area up to the center line into at least a first area and a second area, and interlocks according to the amount of movement of the one side edge regulating member in the divided first area. A member, a second detection transmission member interlocked according to a movement amount of the one side edge regulating member in the second region, a movement amount of the first detection transmission member, and the second detection Detecting means for detecting the paper size of the recording paper based on the amount of movement of the transmission member A display means for displaying a paper size setting screen for setting a paper size of the recording paper on which an image is to be formed; and a paper sheet placed on the paper feed tray on the paper size setting screen based on a detection result of the detecting means. Control means for controlling so as to display a predetermined standard paper size of the recording paper. 26. An image forming apparatus which feeds the recording paper from a paper feed tray on which the recording paper is placed via a conveyance system and forms an image on the recording paper, wherein the recording paper is fed in a feeding direction. A pair of side edge regulating members slidably provided in the paper feeding direction so as to abut against respective side edges formed to extend in a direction intersecting with the recording paper; The area up to the center line is divided into a plurality of areas, and a plurality of detection transmission members, each of which operates in accordance with the amount of movement of the one side edge regulating member in each of the plurality of divided areas, Detecting means for detecting the paper size of the recording paper based on the amount of movement of each of the detection transmitting members; display means for displaying a paper size setting screen for setting the paper size of the recording paper on which an image is to be formed; The paper size based on the detection result of the means. A constant screen, the image forming apparatus characterized by comprising a control means for controlling to display the paper size of a given standard of the recording paper placed on the paper feed tray. 27. A first mode for forming an image by a facsimile procedure, a second mode for forming an image using data from an information processing apparatus, and a third mode for forming an image based on image information from a document reading means. A multi-mode image forming apparatus that uses a mode by mode switching and feeds the recording paper from a paper feed tray on which the recording paper is placed via a conveyance system to form an image on the recording paper. A pair of side edge regulating members slidably provided in a direction intersecting with the paper feeding direction so as to abut against respective side edges formed to extend in the paper feeding direction of the recording paper; A plurality of detection transmission members interlocked in accordance with an amount of movement of the one side edge regulating member; and a paper size of the recording paper in the paper supply tray based on a movement amount of each of the plurality of detection transmission members. Detecting means for detecting; Display means for displaying a paper size setting screen for setting a paper size of the recording paper on which an image is to be formed; and, based on a detection result of the detection means, the paper placed on the paper tray on the paper size setting screen. Control means for controlling to display a predetermined standard paper size of the recording paper. 28. A first mode for forming an image by a facsimile procedure, a second mode for forming an image using data from an information processing apparatus, and a third mode for forming an image based on image information from a document reading means. A multi-mode image forming apparatus that uses a mode by mode switching and feeds the recording paper from a paper feed tray on which the recording paper is placed via a conveyance system to form an image on the recording paper. A pair of side edge regulating members slidably provided in a direction intersecting with the sheet feeding direction so as to abut against respective side edges formed to extend in the sheet feeding direction of the recording sheet. And dividing a region from one side edge of the recording paper to a center line into at least a first region and a second region, and moving the one side edge regulating member in the divided first region. First detection linked with quantity A second detection transmission member interlocked in accordance with a movement amount of the one side edge regulating member in the second region; a movement amount of the first detection transmission member; Detecting means for detecting the paper size of the recording paper in the paper feed tray based on the amount of movement of the detection transmitting member; display means for displaying a paper size setting screen for setting the paper size of the recording paper for forming an image; Control means for controlling a display of a predetermined standard paper size of the recording paper placed on the paper feed tray on the paper size setting screen based on a detection result of the detection means. An image forming apparatus comprising: 29. A first mode for forming an image by a facsimile procedure, a second mode for forming an image using data from an information processing apparatus, and a third mode for forming an image based on image information from a document reading means. A multi-mode image forming apparatus that uses a mode by mode switching and feeds the recording paper from a paper feed tray on which the recording paper is placed via a conveyance system to form an image on the recording paper. A pair of side edge regulating members slidably provided in a direction intersecting with the sheet feeding direction so as to abut against respective side edges formed to extend in the sheet feeding direction of the recording sheet. And dividing the area from one side edge of the recording paper to the center line into a plurality of areas, and interlocking each other according to the amount of movement of the one side edge regulating member in each of the plurality of divided areas. Multiple detection transmission members A detection means for detecting the paper size of the recording paper in the paper feed tray and a paper size setting screen for setting the paper size of the recording paper on which an image is to be formed are displayed based on the amount of movement of each of the detection transmitting members. Control means for controlling a display of a predetermined standard paper size of the recording paper placed on the paper feed tray on the paper size setting screen based on a detection result of the detection means. An image forming apparatus comprising: 30. A first mode in which an image is formed by a facsimile procedure, a second mode in which an image is formed using data from an information processing apparatus, and a third mode in which an image is formed based on image information from a document reading means. A composite type image forming apparatus that uses a mode by mode switching, and feeds the recording paper from a manual feed tray on which the recording paper is placed via a conveyance system, and forms an image on the recording paper, A pair of side edge regulating members slidably provided in a direction intersecting the sheet feeding direction so as to abut against respective side edges formed to extend in the sheet feeding direction of the recording sheet; A plurality of detection transmission members interlocked in accordance with the amount of movement of one side edge regulating member; and detecting the paper size of the recording paper in the manual feed tray based on the amount of movement of each of the plurality of detection transmission members. Detection means Display means for displaying a paper size setting screen for setting the paper size of the recording paper on which an image is to be formed; and, based on the detection result of the detecting means, the paper sheet placed on the manual feed tray on the paper size setting screen. Control means for controlling so as to display a predetermined standard paper size of the recording paper. 31. A first mode for forming an image by a facsimile procedure, a second mode for forming an image using data from an information processing apparatus, and a third mode for forming an image based on image information from a document reading means. A composite type image forming apparatus that uses a mode by mode switching, and feeds the recording paper from a manual feed tray on which the recording paper is placed via a conveyance system, and forms an image on the recording paper, A pair of side edge regulating members provided so as to be slidably movable in a direction intersecting with the sheet feeding direction so as to abut against respective side edges formed to extend in the sheet feeding direction of the recording sheet. Dividing an area from one side edge of the recording paper to a center line into at least a first area and a second area, and moving the one side edge regulating member in the divided first area; The first detection linked in accordance with A transmission member, a second detection transmission member interlocked in accordance with a movement amount of the one side edge regulating member in the second region, a movement amount of the first detection transmission member, Detecting means for detecting the paper size of the recording paper in the manual feed tray based on the amount of movement of the detection transmitting member; display means for displaying a paper size setting screen for setting the paper size of the recording paper for forming an image; Control means for controlling to display a paper size of a predetermined standard of the recording paper placed on the manual feed tray on the paper size setting screen based on a detection result of the detection means. Image forming apparatus. 32. A first mode in which an image is formed by a facsimile procedure, a second mode in which an image is formed by data from an information processing apparatus, and a third mode in which an image is formed based on image information from a document reading means. A composite type image forming apparatus that uses a mode by mode switching, and feeds the recording paper from a manual feed tray on which the recording paper is placed via a conveyance system, and forms an image on the recording paper, A pair of side edge regulating members provided so as to be slidably movable in a direction intersecting with the sheet feeding direction so as to abut against respective side edges formed to extend in the sheet feeding direction of the recording sheet. An area from one side edge of the recording paper to the center line is divided into a plurality of areas, and a plurality of areas interlocked with each other in accordance with the amount of movement of the one side edge regulating member in each of the plurality of divided areas. Each of the detection transmission members, A detecting unit configured to detect a paper size of the recording paper in the manual feed tray based on a moving amount of each of the plurality of detection transmitting members; and a paper size setting screen configured to set a paper size of the recording paper to form an image. Display means for performing, based on a detection result of the detection means, a control means for controlling to display a paper size of a predetermined standard of the recording paper placed on the manual feed tray on the paper size setting screen, An image forming apparatus comprising: 33. A first mode for forming an image by a facsimile procedure, a second mode for forming an image based on data from an information processing apparatus, and a third mode for forming an image based on image information from a document reading means. A multi-mode image forming apparatus that uses a mode by mode switching and feeds the recording paper from a paper feed tray on which the recording paper is placed via a conveyance system to form an image on the recording paper. A pair of side edge regulating members slidably provided in the sheet feeding direction so as to abut against respective side edges formed to extend in a direction intersecting the sheet feeding direction of the recording sheet; A plurality of detection transmission members interlocked in accordance with an amount of movement of the one side edge regulating member; and a paper size of the recording paper in the paper supply tray based on a movement amount of each of the plurality of detection transmission members. Detecting means for detecting; Display means for displaying a paper size setting screen for setting a paper size of the recording paper on which an image is to be formed; and, based on a detection result of the detection means, the paper placed on the paper tray on the paper size setting screen. Control means for controlling to display a predetermined standard paper size of the recording paper. 34. A first mode for forming an image by a facsimile procedure, a second mode for forming an image using data from an information processing apparatus, and a third mode for forming an image based on image information from a document reading means. A multi-mode image forming apparatus that uses a mode by mode switching and feeds the recording paper from a paper feed tray on which the recording paper is placed via a conveyance system to form an image on the recording paper. A pair of side edge regulating members slidably provided in the paper feeding direction so as to abut against respective side edges formed to extend in a direction intersecting the paper feeding direction of the recording paper; An area from one side edge of the recording paper to the center line is divided into at least a first area and a second area, and the one side edge regulating member moves in the divided first area according to the moving amount. First detection transmitting member interlocked with the first detection transmitting member A second detection transmission member that operates in accordance with the amount of movement of the one side edge regulating member in the second region; the amount of movement of the first detection transmission member; and the second detection transmission member Detecting means for detecting the paper size of the recording paper based on the movement amount of the recording paper; display means for displaying a paper size setting screen for setting the paper size of the recording paper on which an image is to be formed; An image forming apparatus for controlling the display so as to display a predetermined standard paper size of the recording paper placed on the paper feed tray on the paper size setting screen. 35. A first mode for forming an image by a facsimile procedure, a second mode for forming an image using data from an information processing apparatus, and a third mode for forming an image based on image information from a document reading means. A multi-mode image forming apparatus that uses a mode by mode switching and feeds the recording paper from a paper feed tray on which the recording paper is placed via a conveyance system to form an image on the recording paper. A pair of side edge regulating members slidably provided in the paper feeding direction so as to abut against respective side edges formed to extend in a direction intersecting the paper feeding direction of the recording paper; The area from one side edge of the recording paper to the center line is divided into a plurality of areas, and each of the plurality of areas interlocked in accordance with the amount of movement of the one side edge regulating member in each of the plurality of divided areas. Detection transmission member and multiple fronts Detecting means for detecting the paper size of the recording paper based on the amount of movement of each of the detection transmitting members; display means for displaying a paper size setting screen for setting the paper size of the recording paper on which an image is to be formed; Control means for controlling to display a paper size of a predetermined standard of the recording paper placed on the paper feed tray on the paper size setting screen based on a detection result of the means. Image forming apparatus. 36. A paper feed tray on which recording paper is placed, and slides in a direction intersecting with the paper feeding direction so as to abut against each side edge formed to extend in the paper feeding direction of the recording paper. A pair of side edge regulating members movably provided, wherein the pair of side edge regulating members abut against each other to detect a paper size of the recording paper, and a paper size detecting method of the image forming apparatus. At least one of the side edge regulating members is slid to move the plurality of detection transmission members in conjunction with each other, and the paper size of the recording paper is set based on the amount of movement of each of the plurality of detection transmission members. A paper size detection method characterized by detecting. 37. The maximum amount of movement of a pair of side edge regulating members movably provided so as to contact the side edges of the recording paper along the paper feeding direction of the paper feeding tray on which the recording paper is placed is set. The first area is divided into at least two halves of the moving amount, and the first area is interlocked with the moving amount of the side edge regulating member.
A paper size detecting method, wherein a paper size is detected by using a paper size detecting means, wherein the detection transmitting member and the second detection transmitting member correspond to respective regions.