| 摘要 |
PROBLEM TO BE SOLVED: To effectively assure a clamping state of an oil supply cap by facilitating attaching and detaching operations of the cap. SOLUTION: The cartridge tank comprises a tank body 11, an oil supply port 13, a threaded part formed on an outer periphery of the port, an oil supply cap 14 for blocking the port 13 by threading with the threaded part, a first gear joint 15 provided to cover the cap 14, a second gear joint 16 provided to be engaged with the joint 15, a spring 17 for pushing the joint 15 into contact with the joint 16 to hold it, and an oil supply cap rotating means 18 for holding one side of the spring 17 and rotating the cap 14. The means 18 has a larger outer diameter than the cap 14 and a wall 18a having a predetermined height in which the cap is not submerged in oil when the cap is set to an equipment is stood on an outer periphery.
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