| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem in a Pachinko machine, wherein although a synthetic resin has good workability and is finished fine, it has a problem in strength, and especially in the case of application to a front frame of the Pachinko machine, the size is large and a game board and a mechanism plate are mounted thereon, resulting in a serious problem in strength, and when a glass door is mounted to the full of the front frame, the side end of the non- hinge side of the glass door is easy to be held by hands, so that there is the fear that a fraudulent wrench opening act occurs frequently. SOLUTION: The upper edge and both right and left side edges of the front frame 2 are respectively provided with a linear reinforcement rib 10 projected on the front side by integral forming, thereby improving the rigidity of the front frame and making difficult fraudulent wrench opening from the side end face of the glass door, or the like. Thus, the rigidity of the front frame can be improved by the reinforcement ribs provided on the upper edge and both right and left side edges of the front frame made of the synthetic resin, and the fraudulent opening from the side end face of the glass door, or the like, can be made impossible by the reinforcement ribs.
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