| 摘要 |
PROBLEM TO BE SOLVED: To reduce a wrong state that much volume of low fusing point alloy make property for rapid movement inferior in a sprinkler head that engages force to a heat sensitive decomposable section with a plurality of engaging pieces of leaf spring and that cannot bear a strong force without increasing the volume of the fusing point alloy for using at the heat sensitive decomposable section. SOLUTION: To weaken force of a leaf spring 83 for receiving force to a heat sensitive decomposable section, a bending angle of an engaging piece of the leaf spring 83 becomes 20 deg. to 60 deg. when there is no load (at an operation) and the bending angle becomes 5 deg. to 55 deg. when there is a load (at normal times). Since the force of the leaf spring 83 is weakened, a volume for using the low fusing point alloy is reduced to improve property for rapid movement.
|
