Sectional Door Spring Tension Assembly with Cable Stop
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Solution Overview
Problem
Current methods for assembling sectional doors fail to ensure safe and optimal tensioning of springs during the assembly process, leading to accidents and errors due to the difficulty in maintaining and guaranteeing spring tension, especially when fixing the end of the traction cable to the lower panel.
Innovation Solution
A specific assembly comprising a spring tensioned in the factory, an abutment element, a stopping, and a release mechanism, which includes a cable system with a support profile, an abutment element with clamping means, and a stop element to maintain cable tension and prevent unwanted movements, allowing for gradual action of the spring on the lower panel and ensuring safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the spring is tensioned during assembly to facilitate door movement, then the door can be moved from lowered to raised position, but the spring may release violently causing accidents
Solution Approach 1:
The spring is pre-tensioned in the factory to the correct tension before assembly, eliminating the need for on-site tensioning operations that could cause violent releases. The spring arrives ready-to-use with controlled pre-applied tension.
Solution Approach 2:
A cable system with a stop element acts as an intermediary between the spring and the door panel. The stop element controls and limits the spring's action, preventing violent releases while still allowing controlled door movement.
2Ease of manufacture
If the lower panel is held in a raised position during cable fixation, then the cable can be attached to the lower panel, but the assembly becomes more complex and time-consuming
Solution Approach 1:
The spring is pre-tensioned in the factory with the cable system already in place, so that during assembly the spring is already tensioned and ready to facilitate door movement immediately upon installation, eliminating the need for complex positioning operations.
Solution Approach 2:
The pre-tensioned spring system automatically positions itself during assembly, with the cable and stop element working together to control the spring's action without requiring external positioning devices or complex assembly procedures.
3Manufacturing precision
If spring tension adjustment is performed on-site, then optimal balanced pulling force can be achieved, but assembly errors and accidents increase
Solution Approach 1:
The spring is pre-tensioned in the factory to the exact required tension using controlled conditions and specialized equipment, ensuring precise tension without the risks of on-site adjustment. The spring arrives with factory-applied tension that requires no field modification.
Solution Approach 2:
The cable system with stop element serves as a controlled intermediary that transmits the factory-applied spring tension to the door panel in a controlled manner, ensuring the tension is applied safely and accurately during assembly without requiring on-site adjustment operations.
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
This solution facilitates safe and accurate assembly of sectional doors by maintaining cable tension, preventing accidents, and ensuring optimal spring action, thus eliminating the need for on-site tension adjustments and reducing assembly errors.
Implementation Method 1
a spring (4) put under tension... exert a tensile force on a cable system... to facilitate movement of the panels (20,21,22,23) from the lowered position (P2) to a raised or partially raised position (P1)
Implementation Method 2
an abutment element (10)... with a clamping means (11)... defining, in the clamping position, a clamping zone (10, 11) between the portion of the cable system (51A) and the free portion (520) of the cable system
Implementation Method 3
a stop element (14)... to maintain the cable (54) or the cable system (5) under the tensile force generated by the spring (4)... and prevent unwanted movements
Data Source
Figure 1
Figure 1
Figure 2
AI summary
Assembly (1) comprising: * a support profile with a compensating spring (4) exerting a tension force on the cable system (5); * a stop element (10) with a clamping means adapted in the clamping position to clamp at least one cable, * a stop element (14) adapted in the stop position, to prevent at least one relative movement in at least one prevented direction (H) with respect to the stop element (10), and * a release means to allow relative movement of the cable in the prevented direction.