| 摘要 |
PROBLEM TO BE SOLVED: To provide a fastening device allowing a fine adjustment of fastening force for a main body of a tank part and minimizing of manufacturing cost. SOLUTION: This tank fastening device for attachably/detachably mounting the tank part on the main body has a locking part provided on the tank part, a hook member having a latch part latched on the locking part, a shaft part extended from the hook member and a pivotally attaching mechanism for oscillatably mounting a tip male screw part of the shaft part on the main body. The shaft part is constituted of a bolt having a square head part with a peripheral surface constituted of a plurality of planes. The hook member has a through hole insertable into a neck lower part of the bolt and a whirl-stop means engaged to at least a plane of the planes of the square head part in a state of the neck lower part of the bolt inserted into the through hole. A tip male screw part of the bolt is screwed onto the pivotally attaching mechanism so as to be movable forward and backward in a shaft line direction.
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