| 摘要 |
A curing machine for pneumatic tires includes a bladder which is tightly held by upper and lower bladder rings, a vertically movable center post for holding the upper bladder ring, and an outer cylinder arranged on a radially outer side of the center post, for supplying a pressurized heat medium into the interior of a green tire. An upper lock mechanism is associated with the top end portion of the center post and serves to automatically lock the upper bladder ring in place by after the top end portion of the center post has been moved upwards and passed through a center through hole in the upper bladder ring. A lower lock mechanism serves to automatically lock and unlock the lower bladder ring, in which a lock region extending downwards from the lower bladder ring is engaged with, and disengaged from a first lock member secured to the outer cylinder by vertically moving a second lock member in opposite directions. The upper and lower lock mechanisms can be operated simultaneously, so that the exchange of the bladders can be performed highly efficiently, in a simplified and within a minimized time.
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