| 摘要 |
PURPOSE: A double ring is provided to improve the assembly productivity of an inner ring and an outer ring and workability. CONSTITUTION: A double ring comprises an inner ring(A) and an outer ring. The inner ring is divided into first and second bodies(10,10') so that the bodies can face each other. In the first and the second bodies, combination groove units(12,12') are formed on the outer circumference thereof. In the inner front of the inner ring, an outer ring joint(21), an inner ring joint, and a protrusion(31) are formed. The inner ring and outer ring is coupled while the outer ring is placed between the first and second bodies. |
