| 摘要 |
PROBLEM TO BE SOLVED: To provide a link of a sprinkler head installable with a link which prevents an easy occurrence of creep and retains joint strength over a long period in the sprinkler head having a nozzle in a body inside connected to a water piping and a valve element constantly closing the nozzle by a lever locking the link formed by joining a pair of metal plates by low melting point alloy. SOLUTION: The cross section of an emboss formed on the joint face of the link is defined as an approximately trapezoidal shape and, when metal plates are joined by the low melting point alloy, an emboss of one metal plate is disposed to superpose on a hole bored in the other metal plate. COPYRIGHT: (C)2008,JPO&INPIT
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