| 摘要 |
PROBLEM TO BE SOLVED: To smoothly move a door in the thickness direction without interfering with a guide rail by providing a pair of front and rear posture maintenance rollers and a lifting prevention roller on the hanging bracket of right and left traveling devices. SOLUTION: The right and left traveling devices 3 of a door 4 spaced from a road are integrated to hung down by a connection member 9 on a pair of guide rails 2 extended in the horizontal direction on a ceiling T in front of a machine. The traveling device 3 is suspended on a traveling rail 2b in parallel to the ceiling T through a traveling roller 6 provided before and behind of the outside upper face 8A of a recessed bracket 8. Front and rear posture maintenance rollers 10 and front and rear lifting prevention rollers 11 are provided on a suspension bracket 8. When the door 4 is moved in the thickness direction because a working space such as maintenance is formed, the posture maintenance roller 10 is guided in a vertical guide face 13a, the lifting prevention roller is guided in a horizontal guide face 13b, the suspension bracket 8 does not interfere with the guide rail 12b, and the door 4 smoothly moves.
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