To easily mount a cassette type fuel cylinder on a work machine, and also easily singly carry and store the cassette type fuel cylinder, by mounting a closing cap for a singly carrying period and a closing cap for a work machine mounting period, in an opening part in a manner that they can be selectively replaced.
Before a cassette type fuel cylinder is mounted on a work machine, mixed oil F as fuel is filled into the fuel cylinder, and after that, a closing plug body 41 having an inserting/fitting part 41a and a flange part 41b, is inserted in an opening part 21, and a closing cap 40 for a singly carrying period is screwed around the opening part 21 and push-pressed so as to tightly close the opening part 21. Under this condition, this cassette type fuel cylinder can be singly carried to a job site such as a farm and also can be stored in a warehouse and the like. In the case that the fuel cylinder is mounted on the work machine at the job site, the closing cap 40 for the singly carrying period and the closing plug body 41 are removed, and a closing cap 22 for a work machine mounting period, on which metallic pipes 34, 35, flexible houses 31, 32, a float member 36, a weight 37, a breather 39 and the like are mounted, is screwed around the opening part 21 through a sealing seal member 38. Hereby, fuel can be simply and easily replenished to the work machine, and further, fuel can be easily carried and stored.
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HIRONAKA YOSHIAKI
TANAKA YOSHIHIRO
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