| 摘要 |
PROBLEM TO BE SOLVED: To provide a door-derail-prevention device, which can prevent a door from coming off a doorsill even when deformation occurs in a peripheral part around the door.SOLUTION: A derail-prevention device 10 in this invention includes: an engaging part 11, which is installed on a landing-area door 3 guided along a doorsill 6, being contained in a space 6a of the doorsill 6 and able to engage with an engaging wall 7 of the doorsill 6; a guide shaft 12, which extends vertically as a single body unified with the engaging part 11, being inserted into a groove 6b of the doorsill 6 and capable of traveling along the extending direction of the groove 6b; and a holding means, which is provided to the landing-area door 3 and holds the guide shaft 12. The holding means includes a movement-regulating means, which allows the landing-area door 3 to move in the axial direction of the guide shaft 12 relatively to the guide shaft 12 when the engaging part 11 is engaged with the engaging wall 7 of the doorsill 6 and is applied with a lifting-up force. The movement-regulating means consists of, for example, a bracket 14, a spring 15, a washer 16, and a nut 17, all installed inside the landing-area door 3. |
