| 摘要 |
PROBLEM TO BE SOLVED: To facilitate punching and nailing to the patterned face of a game board and improve mass production efficiency of game boards in the manufacturing process of game boards of pachinko machines, pinball machines or the like. SOLUTION: In a method for driving pins with a nail driver equipped with a hammering mechanism 9 for driving nails and punching mechanism 19, the hammering mechanism 9 and the punching mechanism 19 are made high-speed by driving with a cam and follower mechanism, and game boards are first punched one by one or on a plural basis and then nails are sequentially driven to all the punched parts.
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