| 摘要 |
PROBLEM TO BE SOLVED: To travel a number of doors with narrow door width stably at the time of opening/closing operation of the doors. SOLUTION: This door opening/closing device includes door rails disposed above an entrance, a pair of rollers 30, 31, 35, 36 engaging with the door rails 6, 7, hangers 12, 17, 22, 27, 32, 37 fitted on the pair of rollers, and doors 62, 65, 68, 69, 72, 73 whose upper ends are fitted on the hangers and whose lower ends are guided on a sill 63, wherein an interval L3 between the pair of rollers is made larger than the width 1 of the door.
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