| 摘要 |
A rail positioning device for use with a retractable bumper assembly that includes an elongated rail movable between a retracted position and an elevated position supported by a plurality of rail support members to prevent bowling balls from entering a bowling lane gutter adjacent the retractable bump assembly when the elongated rail is in the elevated position wherein the rail positioning device comprises a rail positioning assembly disposed in operational relationship relative to a rail positioning actuator each movable between a retracted position and an extended position such that when the rail positioning assembly is moved from the retracted to the extended position by the rail positioning actuator moving from the retracted position to the extended position the rail positioning assembly engages the elongated rail to move the elongated rail from the retracted position to the elevated position to prevent a bowling balls from entering the adjacent gutter.
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