| 摘要 |
PROBLEM TO BE SOLVED: To prevent a fraudulent action by allowing a rib to be hardly broken and removed when the rib for embedding a gap is fixed to both frames in order to prevent the fraudulent action that is carried out by inserting a fraudulent action performance tool to a game area from the gap which is formed between side end edges of both the frames when the front frame is closed with respect to the inner frame. SOLUTION: A metallic side plate 40 fixed to one side 2a of an outer frame 2 in a fraudulent action prevention structure includes: an extension piece 41 projecting forward over the front surface of the outer frame; and the rib 42 obtained by bending the front end edge of the extension piece inward. The rib has a configuration to be fitted into the gap G which is formed between the respective one side parts of the inner frame and the front frame when the front frame 30 is closed with respect to the outer frame in a state where the inner frame 20 is held between the frames. The front frame includes a fraudulence prevention member 50 having a recess which is fitted while being adjacent to the rib when located at a closed position with respect to the outer frame and separated from the rib when located at an opened position with respect to the outer frame. The projecting direction of the rib is set to be in a tangential direction on the circular arcuate movement trajectory of the recess with an axial support part as a center. COPYRIGHT: (C)2011,JPO&INPIT
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