Patent ID: 8332073

Claim:
A library apparatus, comprising: a robot which transports a transportable medium; and an objective unit in which the robot is movably positioned thereto including a light receptor of an objective unit side and a light emitter of the objective unit side which emits light to the outside of the objective unit when light is received by the light receptor of the objective unit side; wherein the robot includes a light emitter of a robot side opposite to the light receptor of the objective unit side that emits light to the light receptor of the objective unit side at the time of positioning of the robot at the objective unit, and a light receptor of the robot side opposite to the light emitter of the objective unit side that receives light from the light emitter of the objective unit side at the time of positioning of the robot at the objective unit, further comprising a positioning control unit which performs positioning control of the robot against the objective unit so that the light receptor of the robot side receives light from the light emitter of the objective unit side, wherein the light receptor of the objective unit side and the light emitter of the objective unit side are provided respectively to a plurality of the objective units; and the positioning control unit stores a position of a first objective unit among the plurality of objective units obtained by performing positioning of the robot to the first objective unit at a storage portion as a first measured position, performs correction of a design position of an objective unit other than the first objective unit based on a difference between the first measured position and a design position of the first objective unit previously stored at the storage portion, and performs positioning control of the robot against an objective unit other than the first objective unit based on the design position after the correction.