| 摘要 |
PROBLEM TO BE SOLVED: To facilitate the exchange of game nails when the game nail is broken by collision with a ball. SOLUTION: A nail insertion hole 22 penetrating a game area 6 and a rear surface 23 is formed in a game board. The game nail 20 is formed in a shape where a linear trunk body 25 having an outer diameter larger than that of the nail insertion hole 22 is successively connected to a head part 26 having an outer diameter larger than that of the trunk body 25. The trunk body 25 has a length which is obtained by adding the thickness of the game board 1 to a dimension being not less than a half of the diameter of the ball. The trunk body 25 is forcedly fitted to the nail insertion hole 22 from the rear surface 23 of the game board 1 and projected in the game area 6. A nail pulling work space 29 where a nail pulling tool is fitted is formed between the head part 26 and the rear surface 23. Thus, the game nail 20 is fitted to the game board 1. When the game nail 20 is fitted to the game board 1 by allowing the head part 26 to contact the rear surface 23 in the circumference of the nail insertion hole 22, the projecting dimension of the trunk body 25 from the game area 6 becomes correct. COPYRIGHT: (C)2005,JPO&NCIPI
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