Fastening Device for Roller Shutter Box Stiffening Element

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional stiffening elements for roller shutter boxes are difficult to assemble, especially when connecting to the window frame, due to the need for screw connections within a narrow space, which can lead to incomplete or insufficient attachment, and existing solutions do not provide a quick and easy installation method.

Innovation Solution

A fastening device with a two-part rolling profile that includes a threaded element accessible from the inside of the roller shutter box, allowing direct screwing into the window frame's metallic reinforcement profile, and featuring pre-defined attachment points for easy assembly, with a sealing ring to protect against water and corrosion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional screw connections are used to attach stiffening elements to the window frame within the narrow roller shutter box space, then the connection can be made, but the assembly becomes difficult and time-consuming, and complete attachment cannot be guaranteed

Engineering Contradiction:

Improveattachment completenessVSAvoidassembly difficulty

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

Instead of inserting screws from the narrow interior space of the roller shutter box to attach the stiffening element, the threaded element protrudes outward from the roller shutter box. This allows the nut to be attached from the accessible exterior side, completely reversing the fastening direction to solve the accessibility problem while ensuring reliable attachment.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The threaded element is pre-installed and protrudes through the roller shutter box before the stiffening element is attached. This preliminary preparation eliminates the need to perform screw connections within the confined space during final assembly, making the installation process straightforward and ensuring complete attachment.

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If the roller shutter box is made narrow to fit standard window frames, then it can be installed in most windows, but the installation space becomes too confined for proper screw connections

Engineering Contradiction:

Improvewindow frame compatibilityVSAvoidinstallation accessibility

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The fastening operation is inverted from interior-to-exterior to exterior-to-interior. By protruding the threaded element outward, the nut can be attached from the accessible exterior side, allowing standard roller shutter box dimensions to be used without compromising installation accessibility.

Inventive Principle:

Principle #13The other way round (Inversion)

3Ease of operation

If the threaded element is exposed outside the roller shutter box, then assembly becomes easy from the exterior, but the abutment becomes vulnerable to water dripping and corrosion

Engineering Contradiction:

Improveassembly accessibilityVSAvoidwater and corrosion exposure

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

A sealing ring is introduced as an intermediary element between the threaded element and the opening in the roller shutter box. This sealing ring prevents water and moisture from reaching the threaded element and abutment, protecting them from corrosion while allowing the threaded element to protrude for easy exterior assembly.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Strength

If additional stiffening elements are added to handle large window widths, then the structural strength increases, but the device complexity and installation time increase

Engineering Contradiction:

Improvewind load resistanceVSAvoidnumber of components

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

By inverting the fastening direction to allow exterior attachment, the installation of additional stiffening elements becomes straightforward rather than cumbersome. Each stiffening element can be independently and quickly attached using the protruding threaded elements, reducing the overall complexity of installing multiple components for large window applications.

Inventive Principle:

Principle #13The other way round (Inversion)

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

Enables quick and secure attachment of stiffening elements to the window frame, ensuring effective force transmission and preventing moisture ingress, while allowing for easy installation and adjustment, even in confined spaces.

Implementation Method 1

A simple sealing ring that is placed around the threaded element is sufficient to seal the opening provided for the threaded element in the upper roll-off profile

Methodology Applied

Scientific EffectSealing:

Data Source

PatentEP2749726B1Fastening device for a stiffening element of a roller shutter box

Publication Date: 2015.11.18 VEKA AG

Figure 1
Figure 2
Figure 3~4

AI summary

The fastening device has a base element (24), which is formed at a hollow profile frame (50) to be mounted in a window or a door. An adapter profile (51) is provided which is firmly attached on the frame and a base profile (52) is positively connected to the adapter profile, where a cavity is formed between the adapter profile and the base profile. A fastening element (15) is arranged in the cavity directly or via a thread element (11) to be connected to a reinforcing profile (54). The thread element is accessible from interior of a roller shutter box (20) via a recess in the base profile. An independent claim is included for a roller shutter box.