Paper conveyance device and method of controlling paper conveyance device
AssigneeKYOCERA Document Solutions Inc.
InventorTakuya HAMADA
Life of this patent
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Abstract
A paper conveyance device includes a paper feed unit, a conveyance rotator, a conveyance guide, a multi-feed detection unit, and a control unit. The control unit causes an ultrasonic sensor to transmit an ultrasonic wave in a detection section. The control unit sets a detection execution section and a detection skip section in the detection section. The control unit does not determine whether multi-feed has occurred in the detection skip section. The control unit sets the detection skip section based on a time point at which vibration is applied to conveyed paper.
Claims13
A paper conveyance device comprising:
- a paper feed unit that accommodates and supplies paper;
- a conveyance rotator that conveys the paper;
- a conveyance guide that guides the conveyed paper;
- a multi-feed detection unit that includes an ultrasonic sensor and a charge circuit;
- and
- a control unit into which a detection voltage that is an output of the multi-feed detection unit is input, wherein
- the ultrasonic sensor includes a transmission unit and a reception unit,
- the transmission unit transmits an ultrasonic wave,
- the reception unit outputs an electric charge corresponding to a level of a received ultrasonic wave,
- the transmission unit and the reception unit are provided on a paper conveyance path such that the paper is conveyed between the transmission unit and the reception unit,
- the charge circuit outputs, as the detection voltage, a voltage obtained by storing the electric charge output by the reception unit, and
- the control unit
- sets, for each sheet of the conveyed paper, a detection section in which the transmission unit is caused to transmit an ultrasonic wave,
- causes the transmission unit to transmit an ultrasonic wave in the detection section,
- sets a detection execution section and a detection skip section in the detection section,
- determines whether multi-feed is occurring based on the detection voltage in the detection execution section,
- does not determine whether multi-feed has occurred based on the detection voltage in the detection skip section, and
- sets the detection skip section based on a time point at which vibration is applied to the conveyed paper.
A method of controlling a paper conveyance device, the method comprising:
- supplying paper from a paper feed unit that accommodates the paper;
- conveying the paper using a conveyance rotator;
- guiding the conveyed paper using a conveyance guide;
- providing a transmission unit and a reception unit of an ultrasonic sensor on a paper conveyance path such that paper is conveyed between the transmission unit and the reception unit;
- using, as the detection voltage, a voltage obtained by storing an electric charge output from the reception unit corresponding to a level of a received ultrasonic wave;
- setting, for each sheet of the conveyed paper, a detection section in which the transmission unit is caused to transmit an ultrasonic wave;
- causing the transmission unit to transmit an ultrasonic wave in the detection section;
- setting a detection execution section and a detection skip section in the detection section;
- determining whether multi-feed is occurring based on the detection voltage in the detection execution section;
- skipping determining whether multi-feed has occurred based on the detection voltage in the detection skip section;
- and
- setting the detection skip section based on a time point at which vibration is applied to the conveyed paper.
Dependencies are inferred from the claim text.