Patent ID: 7641329

Claim:
An image forming apparatus, which is provided with a first pair of rollers and a second pair of rollers along a conveyance path in such a manner that a recording medium, as an object to be conveyed, is conveyed by at least one of the first pair of rollers and the second pair of rollers, the image forming apparatus comprising: a conveyance control device connected to a conveyance device that is operated according to a control signal inputted therein and conveys an object along a conveyance path by applying driving force corresponding to operation amount to the conveyance device conveying the object, the conveyance control device controls the conveyance device to convey the object, and comprises: a detector that detects conveyance distance of the object; a target setter that, before a start of a conveyance, sets a target conveyance speed for conveying the object from the start of conveyance to an end of conveyance; an operation amount calculator that, based on a detection result of the detector, sequentially calculates the operation amount necessary for the conveyance device to convey the object to move the object from the start of conveyance to the end of conveyance at a speed corresponding to the target conveyance speed set by the target setter; a conveyance controller that controls the conveyance device to convey the object by inputting a control signal corresponding to the operation amount calculated by the operation amount calculator into the conveyance device; and a position determiner that determines a position of the object before the start of the conveyance, wherein the target setter, before the start of the conveyance, sets the target conveyance speed corresponding to the position of the object determined by the position determiner, wherein a first target speed and a second target speed are predetermined, prior to conveyance of the recording medium, for: (i) a first section where an edge in an upstream side of a conveyance direction of the recording medium does not pass between the first pair of rollers from the start of the conveyance to the end of conveyance of the recording medium; (ii) a second section where the edge in the upstream side of the conveyance direction of the recording medium passes between the first pair of rollers from the start of conveyance to the end of conveyance of the recording medium; and (iii) a third section where the recording medium is conveyed by the second pair of rollers from the start of conveyance to the end of conveyance of the recording medium, and not conveyed by the first pair of rollers.