| 摘要 |
The present invention relates to a lever for safe operation that is a safety device of a shutter valve and, more specifically, to a lever for safe operation of a shutter valve, which can prevent a gas leak at the push of the lever (3) in an emergency in a shutter valve structure, in which a handle (4) and the lever (3) are arranged on the top, a case body (1) is arranged on the bottom of the handle (4), and a rotary shaft is rotated by a gear wheel electrically driven by a spring in the case body (1) so as to lock a gas valve of a pressure gas tank. The lever (3) for safe operation includes a protrusion (44) protruding from an outer periphery of an elevating lever shaft (46), and a fixing nut (40) arranged on an outer periphery of the lever (3) and having balls built therein. A spring (41) is wound around outer peripheries of the balls (42) to give the elasticity to the balls (42). The fixing nut (40) is coupled to a male screw (48) formed on the top of a body (47) of the lever (3). Through holes are formed in the fixing nut (40) to receive the balls (42). |
