Roller Shutter Guide Rail with Spring-Loaded Stop Element
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Solution Overview
Problem
Existing shutter guide systems require additional assembly steps and may leave gaps between the roller shutter and the window sill, allowing light to penetrate and complicating installation, especially when the window sill is already mounted.
Innovation Solution
A guide device with a displaceable stop member coupled to the guide rail via a return device, allowing the stop element to extend automatically when the roller shutter is lowered, ensuring a flush fit with the window sill without additional assembly and preventing light infiltration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If guide rails are cut off to terminate flush with the window sill, then the roller shutter can be mounted precisely, but this is practically not feasible due to the vertically upwardly directed edge of aluminum window sills
Solution Approach 1:
The guide rail is divided into two functional parts: a fixed portion that is mounted to the window frame, and a displaceable stop member that can be moved independently to extend along the guide rail. This segmentation allows the stop member to be positioned precisely at the window sill level without requiring the entire guide rail to be cut to measure, solving the contradiction between positioning precision and manufacturing feasibility.
Solution Approach 2:
The stop member is designed to be displaceable along the guide rail in the guide direction, allowing it to be dynamically positioned during installation to achieve the correct flush fit with the window sill. This dynamic adjustment capability resolves the contradiction by enabling precise positioning without requiring pre-cutting of the guide rail.
2Reliability
If end caps are added to limit the movement of the roller shutter, then the shutter cannot slide out of the guide rail openings, but a gap remains between the sill and the lowered shutter through which light can fall
Solution Approach 1:
Instead of limiting shutter movement only in the vertical direction through end caps, the invention extends the guide rail in the horizontal direction by adding a stop member that protrudes beyond the guide rail opening. This dimensional extension allows the shutter to be constrained against the window sill horizontally, eliminating the gap that would otherwise allow light penetration while maintaining reliable vertical movement constraint.
3Manufacturing precision
If the guide rail is extended after the window sill is mounted, then the roller shutter can be positioned correctly, but further assembly steps are necessary including solving and moving the closure element and fixing it with a sliding block and screw
Solution Approach 1:
The stop member is pre-positioned on the guide rail before the window sill is mounted, allowing the guide rail to be extended in advance to the correct position. This preliminary action eliminates the need for subsequent assembly steps to adjust and fix the guide rail position, as the stop member is already in place to define the correct termination point against the window sill.
Solution Approach 2:
The stop member is designed to be self-positioning through its displaceable connection to the guide rail, allowing it to automatically extend to the correct position against the window sill without requiring external fixing mechanisms such as sliding blocks and screws. This self-service capability reduces the assembly complexity while maintaining positioning precision.
4Ease of operation
If the stop element is made displaceable to extend automatically when the roller shutter is lowered, then no further assembly steps are needed, but the stop element must be protected during transport against damage and loss
Solution Approach 1:
The stop member is nested within the guide rail structure, being displaceable along the guide rail but contained within its boundaries. This nesting arrangement allows the stop member to be protected during transport by the guide rail structure while maintaining the capability to extend automatically when the roller shutter is lowered, resolving the contradiction between ease of installation and protection during transport.
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 eliminates the need for further assembly steps, ensures a light-tight seal, and protects the stop element during transport, while maintaining an attractive appearance and preventing insect or debris entry.
Implementation Method 1
The restoring device may be formed as a helical spring element, wherein one end of the spring element is connected to the stop element and another end of the spring element to the guide rail
Data Source
AI summary
The present invention relates to a guide device for roller shutters. This device comprises at least one guide rail (2) for guiding a lateral edge region of a roller shutter (4) in and against a guide direction (9), wherein the guide rail (2) has a stop element (8) that is displaceable in and against the guide direction (9) and limits the movement of the roller shutter (4) in the guide direction (9), this position being an end position. The guide device is characterized in that the stop element (8) is coupled to the guide rail (9) via a return mechanism (15).