Sheet conveying device, automatic document feeder, and image forming apparatus
AssigneeRicoh Company, Ltd.
InventorYusuke Nakai
Life of this patent
Estimating the term…
Abstract
A novel sheet conveying device includes a conveyor, a sound collector, and circuitry. The conveyor conveys a sheet in a sheet conveyance direction. The sound collector collects sound produced by a conveyance of the sheet. The circuitry is to cause the sound collector to collect the sound in an abnormal determination operation, determine whether an abnormal conveyance occurs based on the sound collected by the sound collector in the abnormal determination operation, cause the conveyor to convey the sheet at a first speed in the sheet conveyance direction in a normal conveyance operation, and cause the conveyor to convey the sheet at a second speed slower than the first speed in the sheet conveyance direction in the abnormal determination operation.
Claims18
A sheet conveying device comprising:
- a conveyor to convey a sheet in a sheet conveyance direction;
- a sheet separator to separate, at a separation part, the sheet from another sheet conveyed together with the sheet;
- a sound collector to collect sound produced by the conveyor during a conveyance of the sheet;
- and
- circuitry configured to:
- cause the sound collector to collect the sound in an abnormal determination operation;
- determine whether an abnormal conveyance occurs based on the sound collected by the sound collector in the abnormal determination operation;
- determine whether the abnormal conveyance occurs at a time from a start timing of feeding the sheet to a time at which a leading end of the sheet passes through the separation part;
- cause the conveyor to convey the sheet at a first speed in the sheet conveyance direction in a normal conveyance operation;
- and
- cause the conveyor to convey the sheet at a second speed slower than the first speed in the sheet conveyance direction in the abnormal determination operation.
A sheet conveying device comprising:
- a conveyor to convey a sheet in a sheet conveyance direction;
- a sound collector to collect sound produced by the conveyor during a conveyance of the sheet;
- circuitry configured to:
- cause the sound collector to collect the sound in an abnormal determination operation;
- determine whether an abnormal conveyance occurs based on the sound collected by the sound collector in the abnormal determination operation;
- cause the conveyor to convey the sheet at a first speed in the sheet conveyance direction in a normal conveyance operation;
- and
- cause the conveyor to convey the sheet at a second speed slower than the first speed in the sheet conveyance direction in the abnormal determination operation;
- and
- a control panel by which the circuitry is set to one of the normal conveyance operation and the abnormal determination operation,
- wherein the circuitry is further configured to cause the conveyor to convey the sheet at a third speed equal to the first speed when the sound collector does not collect the sound in the abnormal determination operation.
A sheet conveying device comprising:
- a conveyor to convey a sheet in a sheet conveyance direction;
- a sound collector to collect sound produced by the conveyor during a conveyance of the sheet;
- and
- circuitry configured to:
- cause the sound collector to collect the sound in an abnormal determination operation;
- determine whether an abnormal conveyance occurs based on the sound collected by the sound collector in the abnormal determination operation;
- cause the conveyor to convey the sheet at a first speed in the sheet conveyance direction in a normal conveyance operation;
- and
- cause the conveyor to convey the sheet at a second speed slower than the first speed in the sheet conveyance direction in the abnormal determination operation;
- a sheet conveyance passage along which the sheet is conveyed in the sheet conveyance direction;
- and
- a separating part in the sheet conveyance passage to separate the sheet one by one from a bundle of sheets,
- wherein the sound collector is upstream of the separating part in the sheet conveyance direction and adjacent to the conveyor, and
- the circuitry is further configured to cause the sound collector to collect the sound in response to a passage of the sheet through the sheet conveyance passage in the abnormal determination operation.
Dependencies are inferred from the claim text.