JP2014043351A5 - Paper transport device, multifeed judgment method, and computer program - Google Patents

Claims (5)

A separation unit;
A sound collecting unit is provided in the vicinity of the paper conveyance path, and a sound signal output unit that outputs a sound signal corresponding to a sound generated during conveyance of the paper;
An ultrasonic signal output unit that is provided in the vicinity of the paper conveyance path, detects an ultrasonic wave that has passed through the paper, and outputs an ultrasonic signal;
Based on the ultrasonic signal, a double feed determination unit that determines whether or not a double feed of paper has occurred;
Based on the multifeed detection by the double feed determining unit, and a control unit for executing abnormality processing,
The control unit, the even if the double feed determining unit multifeed is determined to have occurred, Jo Tokoro sound signal, the trailing edge of the card or cardboard when said card or cardboard is transported When it occurs at the timing of passing through the separation unit, it is considered that double feeding has not occurred and is controlled so as not to execute the abnormal process.
A sheet conveying apparatus characterized by the above. A position detection signal output unit that detects the position of the paper and outputs a position detection signal;
The paper transport device according to claim 1 , wherein the control unit determines a timing at which a rear end of the card or cardboard passes through the separation unit based on the position detection signal. Prior Symbol controller, passes through the card or the timing of the trailing edge of the cardboard passes through the separation portion, the rear end is the separation portion of the card or cardboard when the card of the card medium and approximately the same size are conveyed The sheet conveying device according to claim 1 or 2 , wherein the sheet conveying device is defined as a timing to perform. A sound signal acquisition step of obtaining a sound signal from a sound signal output unit that outputs a sound signal corresponding to a sound generated during conveyance of the paper, wherein a sound collecting unit is provided in the vicinity of the paper conveyance path;
An ultrasonic signal acquisition step for acquiring the ultrasonic signal from an ultrasonic signal output unit that is provided in the vicinity of the paper conveyance path and detects an ultrasonic wave passing through the paper and outputs an ultrasonic signal;
A double feed determining step for determining whether or not a double feed of paper has occurred based on the ultrasonic signal ;
Based on the multifeed detection by the double feed determination step includes a control step of executing the abnormality processing,
In the control step, even when the multifeed detection in multi-feed is determined to have occurred, Jo Tokoro sound signal, the trailing edge of the card or cardboard when the card or cardboard is transported separation unit If it occurs at the timing of passing , the double feed determination method is characterized in that control is performed so that the abnormal processing is not executed assuming that double feed has not occurred. A sound signal acquisition step of obtaining a sound signal from a sound signal output unit that outputs a sound signal corresponding to a sound generated during conveyance of the paper, wherein a sound collecting unit is provided in the vicinity of the paper conveyance path;
An ultrasonic signal acquisition step for acquiring the ultrasonic signal from an ultrasonic signal output unit that is provided in the vicinity of the paper conveyance path and detects an ultrasonic wave passing through the paper and outputs an ultrasonic signal;
A double feed determining step for determining whether or not a double feed of paper has occurred based on the ultrasonic signal ;
Based on the multifeed detection by the double feed determination step, to be executed and a control step of executing the abnormality processing, to the computer,
In the control step, even when the multifeed detection in multi-feed is determined to have occurred, Jo Tokoro sound signal, the trailing edge of the card or cardboard when the card or cardboard is transported separation unit A computer program that performs control so as not to execute the abnormal process on the assumption that a double feed has not occurred when it occurs at a timing of passing through .