| 摘要 |
A hammer head assembly installed in an air nailing gun to guide a striking rod to drive a U-nail into a wooden material to fix a cord member to the wooden material is constructed to include a hollow mounting base fastened to the air nailing gun, a sliding sleeve moved in and out of the bottom end of the mounting base, a nail holder coupled to the bottom end of the sliding sleeve by a coupling nut and adapted to hold a U-nail in a flat receiving slot thereof for fastening, magnets mounted in the nail holder for securing the loaded U-nail in position for driving, and a hammer rod supported on a spring inside the sliding sleeve for driving by the striking rod of the air nailing gun to force the loaded U-nail out of the nail holder into the wooden material to fix a cord member to the wooden material.
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