To provide a cover opening/closing device with improved resistance to corrosion and wear in which replacing and assembling work is easily performed.
In this cover opening/closing device, a cover main body 9 is fitted in and supported by a frame body 5, and the cover main body 9 is connected to the frame body 5 by a rod-shaped hinge body 20 inserted into the fastening hole 25 of a supporting body 23 protruded to the inside of the frame body 5. A spherical fastening part 11 is fixed to one side of the lower surface of the cover main body 9. The hinge body 20 is provided with a recessed-surface receiving part 20A to fit and connect spherical recessed surfaces A and A of a plurally divided structure provided for an upper part of the hinge body 20 to the spherical fastening part 11, a middle sliding part 20B unrotatably inserted into the fastening hole 25 of the supporting body 23, and a coming-off preventing member 50 detachably connected to the lower part of the sliding part 20B for preventing coming-off from the fastening hole 25.
ONAMI TOYOAKI
OSHIMA TAKESHI
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