| 摘要 |
<p>A clamp device to develop a flange fastening force relatively larger than heretofore with a nut clamp torque relatively smaller than heretofore is provided. A main clamp body (10) includes an elongated tightening groove (13) of a U- or V-shaped transverse cross-section delimited by a pair of groove-forming wall sections. First and second lobe parts (15) are disposed in the vicinity of end portions of two such tightening grooves. The main clamp body presents a ring shape when bolt (22) and nut (23) are mounted in position on the lobe parts (15) disposed facing each other. Each of the lobe parts (15) includes pair of sidewall sections (51) respectively contiguous to the pair groove delimiting wall sections that delimit the tightening groove (13). Each lobe part also includes a curved outer end wall section (52) interconnecting the pair of sidewall sections at an outer end of each lobe part and a seat surface wall section (53) contiguous to the pair of sidewall sections and to the outer end wall section. The seat surface wall section provides a seat surface for bolt or nut. An arcuately shaped fulcrum part (54) is formed on the curved outer end wall section (52) of each lobe part (15) to extend along the curving direction of the outer end wall section.</p> |
