| 摘要 |
The invention is characterized in that in order to improve tensile strength and draw operability for a two-loop coiled type claming device and to suppress the amount of slack to the minimum necessary, the arrangement is such that when the bore diameter of a clamp band 11 is forcibly contractively deformed by inserting a draw operating tool (F) between first and second tool engaging teeth ( 18 ) and ( 22 ) cut up outwardly from the inner and outer overlap portions ( 11 a) and ( 11 b) of the clamp band 11 to engage the tool (F) with the teeth ( 18 ) and ( 22 ), a first fixing tooth ( 17 ) of raised channel shape cut up outwardly from the inner overlap portion ( 11 a) and a second fixing tooth ( 21 ) of recessed channel shape cut up reversely or inwardly from the outer overlap portion ( 11 b) seizure-wise engage each other by a fixed amount (L 4 ) through a tool relief reception communication hole ( 24 ) in the intermediate overlap portion ( 11 c) interposed therebetween.
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