Double-Wing Door Closing Sequence With Spring Pull Compensation
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Solution Overview
Problem
Existing closing sequence arrangements for double-leaf doors require regular maintenance due to settling processes and elongation of tension elements, leading to insufficient actuation of release mechanisms.
Innovation Solution
A closing sequence arrangement with a compensating device using a spring-connected mounting sections and a pulling element, where the actuating device pulls the second mounting section further than necessary, ensuring sufficient movement to actuate the release mechanism, and a mechanical stop limits the pull length to maintain consistent operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tension element (rope or wire) is used to transmit force from the actuating device to the release mechanism, then the pulling movement can be transmitted effectively, but the tension element requires regular retensioning due to settling processes and elongation
Solution Approach 1:
The compensating device automatically compensates for the elongation and settling of the tension element through the spring mechanism. The spring absorbs the excess movement and maintains consistent force transmission without requiring manual retensioning, making the system self-maintaining.
Solution Approach 2:
The spring constant and pre-load can be adjusted to compensate for the elongation of the tension element over time. By changing the spring parameters, the system maintains reliable force transmission despite the gradual elongation of the rope or wire.
2Reliability
If the actuating device pulls the second mounting section by a long actuating length to compensate for element elongation, then sufficient movement is transmitted to actuate the release mechanism, but the excess movement causes deformation of the spring
Solution Approach 1:
The actuating device intentionally provides excessive actuating length (greater than the pull length required to actuate the release mechanism). This excessive action ensures that sufficient movement is always transmitted to reliably actuate the release mechanism, compensating for tension element elongation over time.
Solution Approach 2:
The spring is pre-loaded and designed to absorb the excess movement before it can cause harmful effects. The spring cushion absorbs the difference between the actuating length and the required pull length, preventing excessive deformation while ensuring consistent actuation.
3Strength
If a mechanical stop is added to limit the pull length of the pull element, then the spring deformation is controlled, but the device complexity increases
Solution Approach 1:
The mechanical stop acts as an intermediary element that limits the pull length of the pull element. By introducing this simple limiting mechanism, the spring deformation is controlled while maintaining the compensating function. The stop is a straightforward component that adds minimal 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
The solution provides a low-maintenance, reliable closing sequence for double-leaf doors by ensuring consistent actuation of the release mechanism, accommodating various door configurations and reducing the need for regular retensioning of tension elements.
Implementation Method 1
The two mounting sections are connected to each other via a spring... The pulling force is transmitted via the spring to the first mounting section... The excess movement applied to the second mounting section leads to deformation of the spring
Data Source
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AI summary
The invention relates to a closing sequence arrangement (1) for a double-leaf door system (100) with fixed and active leaf (102, 104), comprising a compensating device (3) with a first fastening section (4), a second fastening section (5) and a spring (6) connecting the two fastening sections, a pull element (7) which is attached at one end to the first fastening section (4) and whose other end is designed for attachment to a release device (21) of a door actuator (2) of the active leaf (104), and an actuating device (8) operatively connected to the second fastening section (5), designed for pulling on the compensating device (3) when actuated by the fixed leaf (102).