| 摘要 |
PURPOSE:To reduce exchange time of rims in the size alteration of a tire by interposing a member deformable in expansion and shrinkage by an air pressure between the rotating shaft and upper and lower rims clamping the tire to facilitate the loading and unloading of both rims. CONSTITUTION:When the size of a tire T is altered, first, working screws 36 and 42 are loosened and plunger sections 45 and 46 of the working screws 36 and 42 are retracted to increase the capacity of pressure paths 35 and 41. The pressure in the pressure paths 35 and 41 lowers to reduce deformable shells 34 and 38 radially inward. As a result, the force pressing the shells 34 and 38 against the upper and lower rims 24 and 26 disappears and allow the upper and lower rims 24 and 26 to be removed from upper and lower rotating shafts 21 and 22. Then, the upper and lower rims 24 and 26 of a suitable size are fitted into rotating shafts 21 and 22 and the plunger sections 45 and 46 of the working screw 36 and 42 are advanced to raise the pressure in the pressure paths 35 and 41 so that the deformable shells 34 and 38 are expanded for mounting. |
