| 摘要 |
PROBLEM TO BE SOLVED: To provide a divisible casing tube which dispenses with fixing metal tools for fixing coupling parts along the axial direction. SOLUTION: Joints 13, 14 are formed at the upper and lower ends in the easing tube 1 and the tube is used by jointing in the axial direction, and formed by circumferentially assembling a plurality of casing elements 2 vertically divided. The mutual casing elements 2 are jointed together to cylindrically assemble at joints 11, 12 formed in the circumferential both ends of the cylindrical elements 2. When the casing elements 2 are combined in a circumferential shape, the elements are mutually pushed to the circumferential direction by a force from the outside acting on the whole circumference. COPYRIGHT: (C)2004,JPO
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