| 摘要 |
PROBLEM TO BE SOLVED: To precisely measure as many nails as possible though nails are implanted too densely or though there are various implanting patterns in a nail angle measuring instrument for a game machine for measuring the angle of the nails, which are implanted to the surface of the game board of the game machine such as a pachinko game machine, with respect to the board surface. SOLUTION: The nail angle measuring instrument 21 is provided with a housing 22, a level 23, a scale board 24, a cover 25, etc. A shaft 26 is fixed to the side of the one end of the housing 22 and an abutting member 27 is mounted and fixed to the side of the shaft tip. The member 27 has a plane abutting surface 28, which can be abutted on the board surface of the game board without tottering. In addition, respectively first to fourth nail abutting parts 31 to 34 are formed on four side surfaces of the member 27.
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