| 摘要 |
PROBLEM TO BE SOLVED: To reduce labor of fractionation work in disposing an inner door by fitting one of two spindle pins with play in a condition neighboring the unfixed edge of a bent spring into one side edge of the inner door and making the spindle pin sinkable into the upper or lower edge of the inner door. SOLUTION: An inner door 5 is equipped in a single swing condition centering on spindle pins 17, 18 protruded upward and downward from one side edge under a game area. A V-shape bent spring 16 made of synthetic resin is equipped in a condition that the bending center is pivotally fit and fixed on one side edge of the inner door. One of two spindle pins 17, 18 is fit with play in a condition neighboring the unfixed edge of the bent spring 16 into one side edge of the inner door 5 and is made sinkable into the upper or lower edge of the inner door 5. Thus, fractionation work becomes easier even when the inner door 5 is to be disposed of.
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