PURPOSE: To eliminate the need for spacers, to reduce the length of an air feed and discharge pipe and to improve durability and safety, by providing freely slidable cover bodies to the top and bottom ends of a cylindrical body of a pressure resistant vessel, bringing the cover bodies into contact with the reaction receiving member of a press frame by the pressure in the vessel and supporting the same.
CONSTITUTION: A pressure resistant vessel 12 is constituted of a cylindrical body 47, a top cover 29, a bottom cover 48 and seals 49, 50. The vessel 12 is moved on the rail 57 on a stand 56 by means of a motor 58 and moves to the positions III-IV-V-IV. While the vessel 12 is in the position IV, the nozzle of the air feed and discharge pipe 30 of an upper reaction receiving member 19 is pressed downward to fit the same to the air feed and discharge port 41 of the cover 29, thereby feeding a pressurizing medium under pressure into the vessel 12. Then, the pressure in the vessel 12 increases gradually, and the cover 29 slides upward until the cover contacts with the member 19. The cover 48 is forced similarly to a lower reaction receiving member 20 in this stage, and the expanding force of the covers 29, 49 is supported by a press frame 11.
WAKI SEIZABUROU
ONOUE HIROSHI
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