Plate transport device and plate changer

A plate transport device that supplies a sample plate to an autosampler and is used in a plate changer, comprising:

• a main body having an intermediate supporter;
• a first moving member that has a first supporter and is supported to be movable in a first direction with respect to the main body;
• a second moving member having a second supporter and is supported to be movable in the first direction with respect to the main body;
• a first elastic member that is attached between the intermediate supporter and the first supporter and supplies a first biasing force directed toward the intermediate supporter in the first direction to the first moving member;
• and
• a second elastic member that is attached between the intermediate supporter and the second supporter and supplies a second biasing force, which is directed toward the intermediate supporter in the first direction and opposite to a direction in which the first biasing force is directed, to the second moving member, wherein
• the sample plate is held between the first moving member and the second moving member by supply of a biasing force directed toward the second moving member to the first moving member by the first biasing force and supply of a biasing force directed toward the first moving member to the second moving member by the second biasing force, and
• the intermediate supporter is provided between the first moving member and the second moving member, and
• further comprising a rotation member that is supported at the main body to be rotatable, wherein
• the rotation member is arranged between the first moving member and the second moving member in the first direction, and presses each of the first moving member and the second moving member in a direction away from the intermediate supporter when the rotation member rotates to be in a pressing position.