Transport Vehicle Retraction for Fire Door Descent
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Solution Overview
Problem
In article transport facilities, the fire protection door may fail to descend to the closed position when the transport vehicle is in its movement path, leading to potential interference and obstruction.
Innovation Solution
The article transport facility includes a transport vehicle with a driving portion, control portion, area detection portion, and descent detection portion, which performs retraction control to move the vehicle outside the interference area when the fire protection door starts descending, ensuring the door can close without interfering with the vehicle or articles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transport vehicle continues to travel along the traveling path when the fire protection door descends, then the transport vehicle can maintain its operation, but the fire protection door may come into contact with the transport vehicle and fail to descend to the closed position
Solution Approach 1:
The area detection portion detects the interference area where the transport vehicle overlaps the door trajectory before the fire protection door descends. The control portion performs retraction control to move the transport vehicle outside this interference area in advance, preventing potential contact and ensuring the door can descend reliably to the closed position.
2Reliability
If the transport vehicle moves out of the interference area when the fire protection door descends, then the fire protection door can close without interference, but the transport vehicle's operation is interrupted
Solution Approach 1:
The descent detection portion detects the descent of the fire protection door and provides feedback to the control portion. When the door is detected to be descending, the control portion immediately executes retraction control to move the transport vehicle outside the interference area, minimizing the operation interruption time while ensuring the door reaches the closed position reliably.
Data Source
AI summary
A fire protection door in an open position is present above a traveling path of a transport vehicle. The fire protection door is capable of moving downward from the open position to a closed position along a door trajectory. The transport vehicle includes: a control portion; an area detection portion that detects an interference area, which is an area in which a portion of the transport vehicle in the traveling path overlaps the door trajectory; and a descent detection portion that detects a descent of the fire protection door. The control portion performs a retraction control such that the transport vehicle travels to the outside of the interference area when the descent detection portion has detected a descent of the fire protection door in a state in which the transport vehicle is located in the interference area.