| CPC A61B 6/4452 (2013.01) [A61B 6/4441 (2013.01); A61B 6/5264 (2013.01)] | 7 Claims |
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1. A radiography apparatus comprising:
an irradiation unit that emits radiation;
an arm that holds the irradiation unit and an accommodation portion in which a detector that receives the radiation, which has been emitted from the irradiation unit and transmitted through a subject, to detect a radiographic image of the subject, is attachably and detachably accommodated, in a facing posture such that the accommodation portion is attachable and detachable;
a support portion that rotatably supports the arm;
a locking mechanism that locks a rotation of the arm with respect to the support portion;
a first attachment and detachment detection unit that detects whether or not the accommodation portion is detached from the arm;
a control unit that performs control not to release the lock even in a case in which an unlock operation for releasing the lock of the rotation by the locking mechanism is performed in a state in which the first attachment and detachment detection unit detects that the accommodation portion is detached from the arm;
a friction mechanism that is switchable between a first state in which a frictional force is applied to the arm in a direction opposite to a direction in which the arm is rotated and a second state in which the frictional force applied to the arm is less than the frictional force in the first state; and
a second attachment and detachment detection unit that detects whether or not the detector is detached from the accommodation portion,
wherein the first attachment and detachment detection unit detects whether or not the accommodation portion is detached from the arm, and
in a case in which the unlock operation is performed in a state in which the first attachment and detachment detection unit detects that the accommodation portion is attached to the arm and the second attachment and detachment detection unit detects that the detector is detached from the accommodation portion, the control unit performs control to permit the release of the lock by the locking mechanism and to switch the friction mechanism to the first state.
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