| 摘要 |
PROBLEM TO BE SOLVED: To perform the action of preventing a swing in the direction orthogonal to the rail direction and of preventing slipping-out from a door lintel by energizing a wheel fitted to and inserted into a casing so as to project upward by a spring in a sliding door opened/closed by rolling door rollers. SOLUTION: When pulling the sliding door 1 in the opening direction, the wheel 52 runs on a bottom wall 73 of a braking member 7 by the braking member 7 installed on a rail 6 in the vicinity of a door stop column 4, and the wheel 52 is pushed to the bottom wall 73 to swing in the clockwise direction against restoring force of a spring 55 to retreat in a casing. At this running-on time, opening of the sliding door becomes heavy since a brake is applied, and when the wheel 52 gets over the bottom wall 73, the wheel 52 projects upward again by restoring force of the spring 55, a central swelling part of the wheel 52 is fitted to a central groove 61 of the rail 6, and the left and right of the wheel 52 roll by lightly contacting with a rolling surface of the rail 6 to smoothly open the sliding door 1.
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