| 摘要 |
PURPOSE:To block a gas supply flow path certainly by incorporating such a construction that a non-fixed sphere rolls out in the event of an earthquake to intrude into an expansion sleeve fitted in the gas supply line. CONSTITUTION:The body 1 is connected horizontally, and an elevation screw 7 and a tray 5 are raised by a handle 10 to make free several of the spheres 4 which have been fixed to a sphere part 12. Main cock for the gas is opened, and now setting ofthe device is completed. In the event of a greater earthquake, the free spheres 4 on a seat 11 step over a rolling hill 13 to drop off in a rolling hole 14, and are received by an expansion sleeve 8 to hinder gas influx from the line 2. In order to return after actuation, the body 1 is turned over and the spheres 4 are pushed back from the line 6.
|
