Propeller attaching device and propeller attaching method

A propeller attaching method for mounting a propeller to a motor by using a propeller attaching device,

• the propeller attaching device including:
• a coupler that includes a base and a first receiving portion, the base having a through-hole into which a protruding portion of an output shaft of a motor is inserted, the protruding portion including one end of the output shaft, the base being coupled to the output shaft, the first receiving portion allowing attachment/detachment of an attachment portion of a propeller by rotation of the propeller in a circumferential direction of the output shaft relative to the base, the propeller having the attachment portion and provided with an opening into which the protruding portion protruding from the through-hole is inserted, the first receiving portion receiving the attachment portion in an axial direction of the output shaft to restrict movement of the propeller in the axial direction, the coupler rotating integrally with the output shaft;
• a movable body that includes a second receiving portion, is supported by the coupler to be movable in the axial direction between an attachment/detachment position and a restriction position, and rotates integrally with the coupler, the attachment/detachment position allowing attachment/detachment of the attachment portion to/from the first receiving portion, the restriction position being located in a first direction relative to the attachment/detachment position, the first direction extending from the other end portion of the output shaft toward the one end portion in the axial direction of the output shaft, the restriction position receiving the attachment portion attached to the first receiving portion in the circumferential direction by the second receiving portion to restrict the rotation of the propeller in the circumferential direction relative to the base;
• and
• a resilient body that presses the movable body in the first direction and rotates integrally with the coupler,
• the method comprising:
• an insertion step of inserting the protruding portion of the propeller protruding from the through-hole of the base, into the opening;
• a first movement step of moving the second receiving portion, from the restriction position to the attachment/detachment position against a resilient force of the resilient body;
• a rotation step of rotating the propeller with the output shaft inserted into the opening, in the circumferential direction to attach the attachment portion to the second receiving portion;
• and
• a second movement step of moving the second receiving portion from the attachment/detachment position to the restriction position by the resilient force of the resilient body.