Monitoring apparatus for rotating gantry, monitoring method for rotating gantry, and particle beam treatment system

A monitoring apparatus for a rotating gantry comprising:

• a rotating gantry that supports both an irradiation nozzle configured to radiate a particle beam and a transport unit configured to transport the particle beam to the irradiation nozzle and rotates around a horizontal axis directed in a horizontal direction;
• a plurality of cables, each of which is connected at one end to the rotating gantry and is connected at another end to a stationary device;
• a spool that is provided on the rotating gantry and performs winding or unwinding of the plurality of cables;
• a monitoring unit that monitors a state of the plurality of cables in the spool;
• and
• a plurality of straightening wires that are bridged laterally below the spool, are provided in a stationary state, and partition the plurality of cables hanging down from the spool.

A monitoring apparatus for a rotating gantry comprising:

• a rotating gantry that supports both an irradiation nozzle configured to radiate a particle beam and a transport unit configured to transport the particle beam to the irradiation nozzle and rotates around a horizontal axis directed in a horizontal direction;
• a plurality of cables, each of which is connected at one end to the rotating gantry and is connected at another end to a stationary device;
• a spool that is provided on the rotating gantry and performs winding or unwinding of the plurality of cables;
• and
• a monitoring unit that monitors a state of the plurality of cables in the spool, wherein:
• the spool includes a plurality of disc-shaped brim disks and a plurality of concave lanes that hold at least one of the plurality of cables between respective brim disks;
• and
• the monitoring unit is configured as a laser sensor that radiates a laser beam along a peripheral edge of the plurality of brim disks in an axial direction and detects at least one of the plurality of cables protruding from the plurality of brim disks.

A monitoring apparatus for a rotating gantry comprising:

• a rotating gantry that supports both an irradiation nozzle configured to radiate a particle beam and a transport unit configured to transport the particle beam to the irradiation nozzle and rotates around a horizontal axis directed in a horizontal direction;
• a plurality of cables, each of which is connected at one end to the rotating gantry and is connected at another end to a stationary device;
• a spool that is provided on the rotating gantry and performs winding or unwinding of the plurality of cables;
• and
• a monitoring unit that monitors a state of the plurality of cables in the spool, wherein:
• the spool includes a plurality of disc-shaped brim disks and a plurality of concave lanes that hold at least one of the plurality of cables between respective brim disks;
• and
• the monitoring unit is configured as a limit switch that detects a protruding state of at least one of the plurality of cables held by the plurality of concave lanes.