Pressed Concrete Shutter Box with Embedded Profile
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Solution Overview
Problem
Rolling shutter boxes integrated into masonry during construction often develop cracks due to differing expansion coefficients between the materials used for the wall and the polystyrene, and fixing the underside of concrete chests is problematic.
Innovation Solution
A box element for a rolling shutter with an embedded support profile on its internal dorsal wall featuring a U-shaped groove for attaching a connecting profile, made of pressed concrete to match the breeze block wall, and a wire mesh with rectangular openings for mortar bonding, along with a connecting profile that transitions between active and transport positions for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If polystyrene is used for the box material, then it is easier to hang plaster, but cracks appear at the junctions due to different expansion coefficients
Solution Approach 1:
The invention changes the material parameter from polystyrene to pressed concrete, which has similar mechanical properties and expansion characteristics to breeze blocks, thereby eliminating cracks while maintaining plaster attachment capability
Solution Approach 2:
The invention uses pressed concrete with aggregates and texture matching the breeze block wall, creating material homogeneity between the wall and box that prevents differential expansion and cracking
2Strength
If concrete chests are used with upturned L-section, then structural strength is improved, but fixing the underside becomes problematic
Solution Approach 1:
The invention separates the structural function (concrete box) from the attachment function (embedded profile with groove), allowing each to be optimized independently while working together as a integrated system
Solution Approach 2:
The embedded profile acts as an intermediary element between the concrete box and the underside, providing a reliable mechanical connection through its groove that receives the connecting profile
3Ease of operation
If the connecting profile is exposed during transport, then installation is simplified, but the profile is vulnerable to shocks and damage
Solution Approach 1:
The invention makes the connecting profile dynamic by allowing it to move between an exposed installation position and a retracted protected position within the cavity, adapting to different operational phases
Solution Approach 2:
The invention nests the connecting profile within the cavity of the box during transport, protecting it from damage, and allows it to be extracted when needed for installation
Data Source
Figure 1~3
Figure 4~5
AI summary
The case has a wall delimiting a cavity and comprising an upper wall and a dorsal wall (2B). A support profile (5) bedded in concrete presents a groove (5A) that receives a profile (6) establishing a connection between the bedded profile and an under surface. A U-shaped part is turned towards the height for rotatively receiving the wings of a connection profile. The case is formed of pressed concrete having the same characteristics and texture of a concrete block used in the wall construction.