Specimen transporting device and specimen transporting method

A specimen transporting device comprising:

• a plurality of holders which detachably hold, one by one, specimen containers having a non-printed region and a printed region on a side surface thereof, each of the holders including a base portion and support posts disposed on a circumference of the base portion at equal intervals, wherein a width of the support posts with respect a center of the holder amounts to a predetermined circumferential angle and at least one support post at least partially overlaps the printed region of a specimen container held by the holder;
• a holder transporting mechanism configured to transport the holders;
• a reading mechanism that is capable of reading information printed in the printed region on the side surface of each specimen container;
• a holder rotating mechanism provided at a holder transfer position and configured to rotate a respective holder such that a respective specimen container held by the respective holder rotates simultaneously, wherein the holder rotating mechanism is configured to perform a preliminary rotation control of continuously rotating the respective specimen container while the reading mechanism reads the information printed in the printed region, subsequently perform a first rotation control of intermittently rotating the respective specimen container, each time by a certain angle equal to or larger than the predetermined circumferential angle, and subsequently perform a second rotation control of continuously rotating the respective specimen container, in a state in which the specimen container is held in the respective holder;
• a control unit that controls the holder rotating mechanism and is programmed to implement:
• a first step of identifying a location of the printed region of the respective specimen container on the basis of success of the reading by the reading mechanism during the preliminary rotation control,
• a second step of identifying a location of the non-printed region of the respective specimen container on the basis of the success of the reading by the reading mechanism during the first rotation control, from the location identified in the first step,
• a third step of identifying a position at which the reading succeeds on the basis of the success of the reading by the reading mechanism during the second rotation control, from the location identified in the second step, wherein the position at which the reading succeeds is an end portion of the printed region of the respective specimen container or, when the end portion of the printed region is hidden by the at least one support post of the respective holder, a boundary between the at least one support post and the printed region, and
• a fourth step, after the third step, of adjusting the location of the printed region of the respective specimen container, including rotating the specimen container by a certain angle from the position at which the reading succeeded during the third step, and adjusting a center of the printed region at a desired angle;
• and
• a fifth step of determining, in a case in which the respective specimen container has been rotated by the predetermined circumferential angle a predetermined number of times without successfully reading the bar code, that an error exists in the respective specimen container, and initiating an error determination process for the respective specimen container;
• a specimen chuck mechanism provided at the holder transfer position and configured to unload, from the respective holder, the respective specimen container held on the respective holder, wherein the control unit is further programmed to unload the respective specimen container from the respective holder after the fourth step;
• and
• a rack which detachably holds the respective specimen container and is provided with a slit on a side surface thereof;
• and
• a rack transporting mechanism configured to transport the rack;
• wherein the chuck mechanism is configured to transfer, to the rack, the respective specimen container unloaded from the respective holder such that the center of the printed region matches the center of the slit of the rack.