Vertical Door Corner Bracket Cable Break Detection
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Solution Overview
Problem
Existing vertical moving door systems face challenges in safely stopping the door in case of lift cable breakage, which can lead to damage to the door tracks and potential safety hazards.
Innovation Solution
A corner bracket with a base plate and guide path for the lift cable, featuring a switch actuated by the lift cable in case of breakage, and a control element that moves to actuate the switch upon cable failure, integrated with an electric circuit to stop the motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cable brake device is used to stop the door in case of cable breakage, then the door can be stopped, but the brake device may damage the door tracks
Solution Approach 1:
The patent introduces an intermediary detection mechanism (switch actuated by cable position) that detects cable failure and triggers motor shutdown before the door can fall and damage tracks. This mediator prevents direct contact between the braking action and the tracks, eliminating harmful effects while maintaining the stopping function.
Solution Approach 2:
The system performs preliminary detection of cable integrity through the switch mechanism that monitors cable position. When cable breakage is detected, the motor is shut down in advance, preventing the door from falling and avoiding track damage before it occurs.
2Device complexity
If no safety detection device is installed, then the device complexity is reduced, but the door cannot be stopped in case of cable breakage
Solution Approach 1:
The lift cable itself serves the dual function of both operating the door and acting as the detection element. When the cable breaks, its absence automatically actuates the switch through the spring mechanism, eliminating the need for separate complex detection systems while maintaining reliable safety monitoring.
Solution Approach 2:
The patent replaces complex electronic or mechanical detection systems with a simple spring-actuated switch mechanism. This mechanical substitution uses the natural movement and tension of the cable system itself to trigger the safety response, significantly reducing device complexity while maintaining detection reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively stops the vertical moving door in case of lift cable breakage, preventing damage to the door tracks and ensuring safety by automatically halting the door's movement.
Implementation Method 1
the control element is a lever, comprising a leaf spring element having a spring force configured to be exceeded by a force from the lift cable
Implementation Method 2
the pin, comprising a helical spring element is configured to be pushed to the first position by the lift cable
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The disclosure relates to a corner bracket (14, 16) for a vertical moving door (2), the corner bracket (14, 16) comprising: a base plate (32) configured to be attached to the door (2); and a guide path (34) for a lift cable (4, 6) arranged in the base plate (32). A switch (28) is arranged in the base plate (32) and configured to be actuated by the lift cable (4, 6) in the event of a breakage of the lift cable (4, 6). The disclosure further relates to a method, performed by a control device (200), for stopping a vertical moving door (2) of a vertical moving door system (100), the vertical moving door system (100).