Tire testing method and tire testing device for locating a position on a tire based on a reference point on the tire and a rotation origin of a spindle

A tire testing device comprising:

• a lubrication unit which applies a lubrication solution to a bead part of a tire provided with a reference point while rotating the tire;
• a main body unit which detects a singular point present on the tire by conducting a tire test while rotating, on a spindle, the tire to which the lubrication solution has been applied by the lubrication unit;
• a marking unit which marks the tire at a position along a circumferential direction where the singular point is present;
• a singular point phase calculating unit;
• and
• a storage unit, wherein
• the lubrication unit has a reference point phase detecting unit which detects a phase of the reference point after application of the lubrication solution, the phase of the reference point being a phase at common coordinates which are common to the lubrication unit, the main body unit, and the marking unit,
• the main body unit has an origin phase detecting unit which detects a phase of a rotation origin of the spindle at the common coordinates, and a singular point phase detecting unit which detects a phase from the rotation origin to the singular point, the rotation origin being an origin capable of assuming various directions relative to a rotation axis of the spindle,
• the singular point phase calculating unit is configured to calculate a phase from the reference point to the singular point based on the phase of the reference point detected by the reference point phase detecting unit, the phase of the rotation origin detected by the origin phase detecting unit, and the phase from the rotation origin to the singular point detected by the singular point phase detecting unit, and
• the storage unit is configured to store information about the reference point at the common coordinates detected by the reference point phase detecting unit and information about the rotation origin at the common coordinates detected by the origin phase detecting unit.