JP2017001878A5

JP2017001878A5 -

Info

Publication number: JP2017001878A5
Application number: JP2015172984A
Authority: JP
Filing date: 2015-09-02
Publication date: 2018-10-11
Anticipated expiration: 2035-09-02

Description

上記目的を達成するための本発明に係る代表的なシート給送装置の構成は、給送されるシートの給送方向と直交するシート幅方向のサイズを検知するサイズ検知手段と、載置部に載置されたシートを給送する給送回転体と、前記給送回転体により給送されたシートを搬送する搬送部とを有する搬送機構と、前記搬送部により搬送されたシートを検知する検知手段と、前記サイズ検知手段の検知結果に基づいて前記搬送機構を制御する制御部であって、前記給送回転体によって給送されるシートの、前記シート幅方向におけるサイズが第１のサイズのときは、前記検知手段の検知に基づいて前記搬送機構を制御する第１の制御を実行し、前記給送回転体によって給送されるシートの、前記シート幅方向におけるシートのサイズが第２のサイズのときは、前記検知手段の検知に基づかずに前記搬送機構を制御する第２の制御を実行する制御部と、を有し、前記検知手段は、前記給送回転体により給送されるシートが前記第１のサイズのときは前記検知手段の検知領域を通過し、前記第２のサイズのときは前記検知領域を通過しないように配置されていることを特徴とする。 In order to achieve the above object, the configuration of a typical sheet feeding apparatus according to the present invention includes a size detection unit that detects a size in a sheet width direction orthogonal to a feeding direction of a sheet to be fed, and a placement unit. A feeding rotating body that feeds the sheet placed on the sheet, a conveying mechanism that conveys the sheet fed by the feeding rotating body, and a sheet conveyed by the conveying section. And a control unit that controls the transport mechanism based on a detection result of the detection unit and the size detection unit, wherein a size of the sheet fed by the feeding rotating body in the sheet width direction is a first size. In this case, the first control for controlling the transport mechanism is executed based on the detection of the detection means, and the sheet size in the sheet width direction of the sheet fed by the feeding rotating body is second. The size of A control unit that executes a second control for controlling the transport mechanism without being based on the detection of the detection unit, and the detection unit is configured to detect a sheet fed by the feeding rotating body. The first size is arranged so as to pass through a detection area of the detection means, and the second size is arranged so as not to pass through the detection area.

Claims

Size detecting means for detecting the size in the sheet width direction orthogonal to the feeding direction of the sheet to be fed;
A transport mechanism having a feeding rotating body that feeds the sheet placed on the placing section, and a transporting section that transports the sheet fed by the feeding rotating body;
Detecting means for detecting the sheet conveyed by the conveying unit;
The control unit that controls the transport mechanism based on the detection result of the size detection unit, and when the size of the sheet fed by the feeding rotating body in the sheet width direction is the first size, When the first control for controlling the transport mechanism is executed based on the detection by the detection unit, and the sheet size in the sheet width direction of the sheet fed by the feeding rotating body is the second size Includes a control unit that executes a second control for controlling the transport mechanism without being based on detection by the detection unit;
Have
The detection means passes the detection area of the detection means when the sheet fed by the feeding rotating body is the first size, and does not pass the detection area when the sheet is the second size. The sheet feeding apparatus is characterized by being arranged in

Size detecting means for detecting the size in the sheet width direction orthogonal to the feeding direction of the sheet to be fed;
A feeding rotating body that feeds a sheet placed on the placement unit;
A moving unit movable to a feeding position where the feeding rotating body comes into contact with the sheet placed on the placing unit and a retracted position away from the sheet;
A transport unit for transporting the sheet transported by the feeding rotating body;
A leading edge detecting means for detecting a leading edge of the sheet that has reached the conveying section;
A control unit that controls the moving unit based on a detection result of the size detection unit, and when the size in the sheet width direction of the sheet fed by the feeding rotating body is the first size, Based on the detection result of the leading edge detection means, the moving unit moves the feeding rotating body from the feeding position to the retracted position, and the size of the sheet fed by the feeding rotating body in the sheet width direction is determined. When the second size, a control unit that moves the feeding rotator to the retracted position by the moving unit after a predetermined time has elapsed from the start of sheet feeding by the feeding rotator;
Have
The leading edge detection means passes through the detection area of the leading edge detection means when the sheet fed by the feeding rotating body is the first size, and passes through the detection area when the sheet is the second size. A sheet feeding device characterized by being arranged so as not to occur.

The conveyance unit conveys the sheet by nipping the sheet between the first member and the second member,
3. The sheet according to claim 2, wherein the leading edge detection unit detects a leading edge of a sheet passing through a detection region located on an extension line in the sheet width direction in a nip region between the first member and the second member. Feeding device.

A mixed mode in which a plurality of sheets having different sizes in the sheet width direction are fed;
In the mixed loading mode, the control unit moves the feeding rotary body to the retracted position by the moving unit after a predetermined time has elapsed from the start of feeding of the sheet by the feeding rotary body regardless of the detection result by the size detection unit. The sheet feeding device according to claim 2, wherein the sheet feeding device is moved.

A mixed mode in which a plurality of sheets having different sizes in the sheet width direction are fed;
In the mixed loading mode, the control unit moves the feeding rotating body to the retracted position by the moving unit after a predetermined time has elapsed from the start of sheet feeding by the feeding rotating body, and before the predetermined time has elapsed. The feed rotating body is moved to the retracted position by the moving unit based on detection by the leading end detecting unit when the leading end detecting unit detects the leading end of the sheet to be fed. 2. A sheet feeding apparatus according to 2.

The predetermined time is a time from the start of the sheet feeding operation by the feeding rotating body until the leading edge of the fed sheet reaches the conveyance unit. The sheet feeding device according to claim 5.

The first member is a separation roller that rotates in a direction in which a sheet fed by the feeding rotating body is conveyed downstream in the sheet feeding direction,
The sheet feeding device according to any one of claims 3 to 6, wherein the second member is a retard roller that rotates in a direction in which the sheet is returned to the upstream in the sheet feeding direction.

The first member is a separation roller that rotates in a direction in which a sheet fed by the feeding rotating body is conveyed downstream in the sheet feeding direction,
The second member is a separation member that presses the sheet against the separation roller.
The sheet feeding apparatus according to claim 3, wherein the sheet feeding apparatus is a sheet feeding apparatus.

The said 1st member and the said 2nd member are a conveyance roller pair rotated in the direction which conveys the sheet | seat fed by the said feeding rotary body to the downstream of a sheet | seat feeding direction. The sheet feeding apparatus according to claim 6.

The sheet feeding apparatus according to any one of claims 3 to 9, wherein the nip region is a region where the first member and the second member are in contact with each other.

The sheet feeding device according to any one of claims 2 to 10, wherein the size detection unit detects a size of a sheet placed on the placement unit.

Size detecting means for detecting the size in the sheet width direction orthogonal to the feeding direction of the sheet to be fed;
A feeding rotating body that feeds a sheet placed on the placement unit;
A transport unit for transporting the sheet fed by the feed rotating body;
A leading edge detecting means for detecting a leading edge of the sheet that has reached the conveying section;
A control unit for controlling the operation of the feeding rotating body and the conveying unit based on a detection result of the size detecting unit, wherein a sheet fed by the feeding rotating unit defines a detection area of the leading end detecting unit; In the case of a passing size, the first drive control is performed based on the detection by the leading edge detection means, and in the case where the sheet to be fed is a size that does not pass through the detection area, the second driving control is not based on the detection by the leading edge detection means. A control unit that performs drive control of
A sheet feeding apparatus comprising:

The conveyance unit conveys the sheet by nipping the sheet between the first member and the second member,
The sheet according to claim 12, wherein the leading edge detection unit detects a leading edge of a sheet passing through a detection region positioned on an extension line in the sheet width direction in a nip region between the first member and the second member. Feeding device.

In the first driving control, when the leading edge detection unit does not detect the sheet within a predetermined time after the sheet feeding starts, the sheet is conveyed at a first speed, and the leading edge detection unit is moved to the sheet within the predetermined time. 14. The sheet feeding apparatus according to claim 12, wherein when the sheet is detected, the sheet is conveyed at a second speed that is slower than the first speed until the sheet reaches a predetermined position.

In the first driving control, when the leading edge detection unit does not detect the sheet within a predetermined time after the sheet feeding starts, the sheet is conveyed at a first speed, and the leading edge detection unit is moved to the sheet within the predetermined time. The sheet feeding device according to claim 12 or 13, wherein the sheet feeding is stopped for a predetermined time when the sheet is detected and then conveyed at the first speed.

The sheet feeding device according to claim 14, wherein the second drive control conveys the sheet at a third speed that is slower than the first speed and faster than the second speed.

The first drive control and the second drive control are controls for setting a distance from a trailing edge of a preceding sheet until a leading edge of the conveyed sheet reaches a predetermined position within a predetermined range. The sheet feeding apparatus according to any one of claims 12 to 16.

At least one of the first member or the second member is a roller member that is detachably attached to a support shaft that is cantilevered.
The sheet feeding device according to claim 13, wherein the leading edge detection unit is disposed at a position spaced apart from the end of the support shaft by a length equal to or longer than the length of the roller member in the removing direction of the roller member. .

In a reading device that feeds a sheet and reads information described on the sheet,
A sheet feeding device according to any one of claims 1 to 18,
A reading unit for reading information written on the fed sheet;
A reading apparatus comprising:

In an image forming apparatus that feeds a sheet and forms an image on the sheet,
A sheet feeding device according to any one of claims 1 to 18,
An image forming unit that forms an image on the fed sheet;
An image forming apparatus comprising: