Retractable Limit Stops for Rolling Shutter Guide Rails
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing solutions for the engagement and disengagement of the final slat in a rolling shutter apron with guide tulip devices are not satisfactory, as they provide inadequate resistance for secure disengagement and require complex manipulation for dismantling or repair.
Innovation Solution
A tulip device with retractable end stops that cooperate with complementary stops on the slats, allowing for secure engagement and disengagement only through voluntary operator intervention, featuring a U-shaped structure with guide walls and elastic limit stops that adjust passage width to prevent accidental disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed stop structures are used in the guide tulip device, then the slat is securely maintained in position, but the disengagement requires complex manipulation and excessive force
Solution Approach 1:
The stop structure is designed as an elastic element that can dynamically change its position between a blocking position (during normal operation) and a retracted position (during disengagement). This dynamic characteristic allows the stop to provide secure maintenance during normal use while allowing easy disengagement when needed, resolving the contradiction between reliability and ease of operation.
Solution Approach 2:
The elastic stop changes its physical state between engaged and disengaged positions through force application. During normal operation, the stop maintains a blocking parameter configuration that secures the slat. During disengagement, applying force changes the parameter (position of the stop) to allow the slat to be removed, thus resolving the contradiction between secure maintenance and easy disengagement.
2Ease of operation
If retractable stop structures are used to allow easy disengagement, then the disengagement becomes easier, but the resistance against accidental disengagement is insufficient
Solution Approach 1:
The elastic stop provides different resistance characteristics under different conditions. During normal operation, it maintains a stable blocking position that prevents accidental disengagement. During intentional disengagement, the operator applies sufficient force to overcome the elastic resistance and move the stop to the retracted position. This dynamic behavior resolves the contradiction between ease of operation and prevention of accidental disengagement.
Solution Approach 2:
The elastic stop acts as a cushioning element that provides resistance against unintended disengagement forces while allowing controlled disengagement. The elastic properties beforehand cushion against accidental movements but can be deliberately overcome when proper disengagement is required, resolving the contradiction between reliability and ease of operation.
3Reliability
If complex manipulation procedures are required for disengagement, then the secure maintenance is improved, but the time and complexity of assembly/disassembly increases
Solution Approach 1:
The dynamic elastic stop eliminates the need for complex manipulation procedures. During assembly, the stop naturally moves to the blocking position as the slat is inserted. During disengagement, a simple pulling motion on the handle suffices to retract the stop and remove the slat. This dynamic design resolves the contradiction between secure maintenance and assembly/disassembly time.
4Adaptability or versatility
If the guide tulip device is designed as an independent added piece, then the adaptability and ease of assembly are improved, but the structural complexity increases
Solution Approach 1:
The guide tulip device with the elastic stop mechanism is designed as an integrated assembly that combines multiple functions (guidance, stopping, and disengagement control) into a single unit. This merging approach maintains adaptability and ease of assembly while reducing the number of separate components, thus resolving the contradiction between adaptability and structural complexity.
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
Ensures safe and controlled disengagement of the final slat from the guide rails, preventing accidental slipping during the folding phase and allowing for easy assembly and disassembly by maintaining the slat in place until voluntary action is taken.
Implementation Method 1
said guide slider defines limit stops capable of being pushed back against the force of their elasticity
Data Source
AI summary
The device (10) has an engagement unit on an upper end of guide rail (6). Front and rear guide walls extend from a bottom side of the device. One of the walls has a limit stop (17) retractable between an active position in which the stop is engaged with a complementary stop (18) provided with a blade of apron to prevent the engagement and disengagement of the blade and a retracted position to allow engagement and disengagement of the blade. The rail constitutes a locking unit to lock the limit stop in the active position during a complete engagement position of the device in the rail. An independent claim is also included for a method for engagement or disengagement of blade of apron.