JP2022082328A5

JP2022082328A5 -

Info

Publication number: JP2022082328A5
Application number: JP2020193822A
Authority: JP
Filing date: 2020-11-20
Publication date: 2023-11-21
Anticipated expiration: 2040-11-20

Description

本発明の一態様は、シートが積載されるシート積載部と、前記シート積載部に積載されたシートを１枚ずつ分離して搬送方向に搬送する搬送手段と、前記搬送手段によって搬送されるシートの画像を読み取る読取手段と、前記搬送手段によって搬送されるシートを検知する第１センサと、前記搬送方向において前記第１センサと同一の位置であり、且つ前記搬送方向に直交する方向おいて前記第１センサとは異なる位置において、前記搬送手段によって搬送されるシートを検知する第２センサと、前記第１センサ及び前記第２センサの一方がシートを検知してから第１所定時間が経過するまでに他方がシートを検知しない場合に、前記搬送手段によるシートの搬送を停止する停止処理を実行する制御手段と、を備え、前記制御手段は、前記第１センサ及び前記第２センサの前記一方がシートを検知してから前記第１所定時間が経過するまでに前記他方がシートを検知しないことが、所定の回数連続して発生した場合に、前記第１センサ及び前記第２センサに基づく前記停止処理を無効化することを特徴とする画像読取装置である。 One aspect of the present invention includes a sheet stacking section on which sheets are stacked, a conveyance unit that separates the sheets stacked on the sheet stacking unit one by one and conveys them in a conveyance direction, and a sheet conveyed by the conveyance unit. a first sensor for detecting the sheet conveyed by the conveyance means; A second sensor detects the sheet conveyed by the conveying means at a position different from that of the first sensor, and a first predetermined time period elapses after one of the first sensor and the second sensor detects the sheet. control means for executing a stop process for stopping conveyance of the sheet by the conveyance means when the other sensor does not detect the sheet by the time the other sensor detects the sheet; If it occurs a predetermined number of times in a row that the other does not detect the sheet within the first predetermined period of time after the second sensor detects the sheet, the This is an image reading device characterized by disabling stop processing .

Claims

a sheet stacking section on which sheets are stacked;
a conveyance means that separates the sheets stacked on the sheet stacking section one by one and conveys them in the conveyance direction;
a reading means for reading an image of a sheet conveyed by the conveying means;
a first sensor that detects a sheet conveyed by the conveyance means;
a second sensor that detects the sheet conveyed by the conveyance means at the same position as the first sensor in the conveyance direction and at a different position from the first sensor in a direction perpendicular to the conveyance direction; ,
If one of the first sensor and the second sensor does not detect the sheet until a first predetermined time period elapses after one of the first sensor and the second sensor detects the sheet, a stop process is executed to stop conveying the sheet by the conveying means. control means for ;
Equipped with
The control means may be arranged such that the first sensor and the second sensor do not detect the sheet for a predetermined number of consecutive times after the first sensor and the second sensor detect the sheet until the first predetermined time elapses. An image reading device characterized in that, when this occurs, the stop processing based on the first sensor and the second sensor is invalidated .

2. The image reading device according to claim 1, wherein the first sensor and the second sensor are arranged at positions the same distance apart from the center of the conveyance path in a direction perpendicular to the conveyance direction.

a third sensor that detects a sheet conveyed by the conveyance means;
a fourth sensor that detects the sheet conveyed by the conveyance means at the same position as the third sensor in the conveyance direction and at a different position from the third sensor in a direction perpendicular to the conveyance direction; ,
has
The control means stops conveyance of the sheet by the conveyance means when one of the third sensor and the fourth sensor does not detect the sheet until a second predetermined time period elapses after one of the third sensor and the fourth sensor detects the sheet. The image reading device according to claim 1 or 2, characterized in that:

The image reading device according to claim 3, wherein the first sensor and the second sensor are arranged between the third sensor and the fourth sensor in a direction perpendicular to the transport direction. Device.

2. The control means determines whether or not the first sensor and the second sensor detect a sheet each time the conveyance means conveys a sheet from the sheet stacking section. 4. The image reading device according to any one of 4.

If the other one of the first sensor and the second sensor detects the sheet and the first predetermined time period elapses, the sheet is not conveyed by the conveyance means by the control means. 6. The image reading apparatus according to claim 1, further comprising a notification means for notifying a user that a conveyance abnormality has occurred when the image reading apparatus is stopped.

The control means is configured to control the first sensor and the second sensor when the other of the first sensor and the second sensor detects a sheet being conveyed by the conveyance means after invalidating the stop processing. 7. The image reading apparatus according to claim 1, wherein the conveyance of the sheet by the conveyance means is stopped based on the detection of the sheet by a sensor.

Counting the number of times the first sensor does not detect a sheet being conveyed by the conveying means, and setting the count to an initial value when the first sensor detects a sheet being conveyed by the conveying means. a first counter to be returned;
Counting the number of times the second sensor does not detect a sheet being transported by the transporting means, and setting the count to an initial value when the second sensor detects a sheet being transported by the transporting means. a second counter to return;
has
The control means controls the conveyance of the sheet by the conveyance means based on the detection of the sheet by the first sensor and the second sensor when the count of the first counter or the second counter is equal to or greater than the predetermined number of times. The image reading device according to any one of claims 1 to 7, characterized in that the image reading device does not stop.

An image reading device according to any one of claims 1 to 8,
an image forming means for forming an image on a recording medium;
An image forming apparatus comprising:

a sheet stacking section on which sheets are stacked;
a conveyance means that separates the sheets stacked on the sheet stacking section one by one and conveys them in the conveyance direction;
a reading means for reading an image of a sheet conveyed by the conveying means;
a first sensor that detects a sheet conveyed by the conveyance means;
a second sensor that detects the sheet conveyed by the conveyance means at the same position as the first sensor in the conveyance direction and at a different position from the first sensor in a direction perpendicular to the conveyance direction; ,
control for executing a stop process for stopping conveyance of the sheet by the conveying means when one of the first sensor and the second sensor does not detect the sheet within a predetermined time period after the other sensor detects the sheet; means and
Equipped with
The control means disables the stop processing based on the first sensor and the second sensor when the stop processing based on the first sensor and the second sensor occurs consecutively a predetermined number of times. An image reading device characterized by: