ATTACHMENT/DETACHMENT MECHANISM FOR OVERCHARGE PREVENTING DEVICE, METHOD OF DETACHING OVERCHARGE PREVENTING DEVICE AND METHOD OF ASSEMBLING OVERCHARGE PREVENTING DEVICE

摘要

PROBLEM TO BE SOLVED: To safely and easily attach/detach an overcharge preventing device without degassing a storage container and facilitate maintenance work. SOLUTION: The overcharge preventing device 12 has a pipe portion 4 connected to a charging opening 2, a valve body portion 5 fitted in the filing opening 2 and detachably tightened thereto, and a first operation bar 13 energized and mounted on the side of the valve body portion 5 movably to the axial direction and provided with a valve element 14 for blocking the pipe portion 4 at its other end 4b. A detachment jig 11 has a base 23 mounted on the filling opening portion 2, a pressure plate 25 opposed to the valve body portion and mounted on the base 23 via a column 24, and a second operation bar 26 mounted on the pressure plate 25 movably forward and backward to the axial direction and provided with input ends at both ends where a holddown portion 27 contacting the valve body portion 5 is engaged with a rotational member 50.