| 摘要 |
A rigid core (1) is efficiently, stably and very accurately assembled and disassembled without using a bolt. The rigid core (1) is provided with: a core body (3) comprising a plurality of core segments (9) divided in the circumferential direction of the tire; a cylindrical core (5) for preventing the movement of each core segment (9) toward the inside in the radial direction, and inserted into the center hole of the core body (3); and a pair of side plates (6L, 6U) for preventing the movement of each core segment (9) in the axial direction thereof, by being positioned on both sides in the axial direction of the core body (3), and by sandwiching and holding the core body (3) between the inside surfaces thereof. A first dovetail part (16) is formed on the outer circumferential surface of the core (5), and a second dovetail part (17) for engaging with the first dovetail part (16) is formed on the inner circumferential surface of each core segment (9). The side plate (6L, 6U) on one side is fixed to the end of the core (5) on one side thereof, and the side plate (6L, 6U) on the other side is detachably joined to the core (5) by a joining mechanism (23) having a ball lock mechanism. |
