| 摘要 |
PURPOSE:To enable the axial center positioning, regardless of the presence of a size tolerance in the outer diameter of an insulating container, and make the grinding of the end portion of the insulating container unnecessary, by using fixed jigs and positioning jigs having a sliding part. CONSTITUTION:Fixed jigs C1, C2, to which sealing fittings 2a, 2b can be fitted, and positioning jigs E1, E2, capable of fitting to the fixed jigs C1, C2, having at the axial end thereof a sliding part extending in such a manner that it forms spiral loci, are prepared. Then, the sealing fittings 2a, 2b are fitted to the fixed jigs C1, C2, and the ends of an insulating container 1 are placed on the peripheral ends of the sealing fittings 2a, 2b, and then the positioning jigs E1, E2 are fitted to the fixed jigs C1, C2 and rotated to move the outer diameter portion of the insulating container 1 to the central position of the sealing fittings 2a, 2b. Therefore, the axial center positioning of the insulating container 1 can be carried out with high precision. Thus, there will be no trouble even if the size tolerance in the outer diameter of the insulating container is large, and no gringing of the end portion of the insulating container will be required. |
