Guide Rail Stop Device Transverse Engagement
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Solution Overview
Problem
Existing roller shutter and sectional door systems face issues with stop device disengagement due to weight and deployment speed, leading to the apron slats escaping from the guide slides, especially when there is no support at the threshold, causing folding impossibility.
Innovation Solution
A stop device is integrated into the slide with interlocking means that engage perpendicularly to the longitudinal axis, preventing disengagement by fitting into the groove of the slide, allowing for square alignment with the apron slats regardless of threshold alignment, and providing adjustable positioning to maintain proper alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If end pieces are engaged longitudinally from the lower end into the lateral guide rails, then the stop device can be installed, but the apron can cause disengagement of the end piece due to weight and deployment speed
Solution Approach 1:
The patent transitions the engagement direction from longitudinal (parallel to slide axis) to transverse (perpendicular to slide axis). The end piece engages the slide from the side rather than from the lower end, changing the dimensional approach to prevent disengagement caused by longitudinal forces during deployment.
Solution Approach 2:
The stop device is segmented into distinct components: the end piece with engagement protrusion and the slide with corresponding reception groove. This segmentation allows independent optimization of each component's geometry to achieve both secure retention and ease of deployment.
2Reliability
If the stop device is engaged from the lower end, then it can provide support, but the first slats can escape from the side guide slides causing folding impossibility
Solution Approach 1:
By engaging the stop device transversely rather than longitudinally, the patent prevents lateral escape of slats while maintaining vertical support. The transverse engagement creates a barrier that blocks sideways movement without interfering with the vertical deployment and folding operations.
3Ease of manufacture
If the slide is in the usual U-section form, then it provides standard guiding, but profound modifications are needed to prevent stop device disengagement
Solution Approach 1:
The slide maintains its standard U-section form for the majority of its structure, preserving ease of manufacture. Only local modifications are made: adding a transverse engagement groove and positioning features on the slide's lateral surfaces. This localized approach achieves improved retention without requiring complete redesign.
Solution Approach 2:
The modified U-section slide serves multiple functions: it provides the standard guiding function for the apron slats while simultaneously providing transverse engagement features for the stop device. The dual functionality is achieved by adding engagement grooves that work alongside the existing guiding geometry.
Data Source
Figure 1~4
AI summary
The slide-bar (1) has jointing units constituted by a support flange for receiving complementary jointing units with a stopping device (3) by moving the flange along a direction perpendicular to a longitudinal axis of the slide-bar and by engaging the flange in a groove. The stopping device provides immobilization of the complementary jointing units in the slide-bar along the moving direction in the slide-bar of a screening device. The support flange is defined in the slide-bar on which the stopping device is supported.