SLIDING DOOR DEVICE

摘要

In a sliding door apparatus, a doorway is opened and closed by a low-speed door and a high-speed door that performs opening and closing actions at a faster speed than the low-speed door. A light-emitting portion is disposed on a high-speed door front surface and emits light obliquely upward. A light-receiving portion that receives light that has been emitted from the light-emitting portion is disposed on an upper portion of a doorway frame. A determining portion determines presence or absence of an obstruction in a vicinity of a low-speed door doorstop end portion based on an amount of light received at the light-receiving portion.