Sliding Formwork Brick Reaction Bearing Design
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Solution Overview
Problem
Existing sliding formwork bricks experience reduced force transmission and complex fabrication due to line-shaped support on cross laths, leading to unreliable static positioning and increased production complexity.
Innovation Solution
A sliding formwork brick with an upper bar-shaped reaction bearing featuring a support surface inclined at 3° to 20° and a contact surface at 90°, providing flat contact with cross laths for improved support and positioning, along with a reinforcement rib to prevent sagging during extrusion and transportation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the reaction bearing is supported on the cross lath in a line shape, then the structure is simple, but the force transmission is reduced and positioning is unreliable
Solution Approach 1:
The reaction bearing is changed from a line-shaped support (1D contact) to a surface-shaped support (2D contact) that extends in the longitudinal direction. This dimensional change transforms the contact from a line to an area, providing both simple structure and reliable force transmission through increased contact surface area with the cross lath.
2Ease of manufacture
If the reaction bearing is supported on the cross lath in a line shape, then the fabrication process is simple, but the force transmission is reduced
Solution Approach 1:
The reaction bearing extends in the longitudinal direction to create a surface contact area instead of a line contact. This maintains ease of manufacture through simple extrusion processes while significantly improving force transmission by distributing loads over a larger surface area that contacts the cross lath.
3Reliability
If a bevel is added to the cross lath and slanted screw holes are fabricated, then reliable static positioning is achieved, but the fabrication process becomes complex
Solution Approach 1:
Instead of modifying the cross lath with bevels and modifying screw hole positioning, the invention inverts the approach by changing the reaction bearing geometry itself. The reaction bearing is designed with a surface shape that naturally contacts the flat cross lath, eliminating the need for beveled surfaces and slanted screw holes while maintaining reliable positioning.
Solution Approach 2:
The invention extracts and eliminates the complex fabrication requirements (bevels on cross lath, slanted screw holes) by redesigning the reaction bearing. The solution removes the need for these additional fabrication steps while achieving the same reliable static positioning function through the surface-shaped reaction bearing contact.
Data Source
AI summary
The invention relates to a device (10) for fastening facade elements (40) with a plate (12) which, when fastened, extends in the vertical direction (z-direction) in a length b and in the horizontal direction (y-direction) and can be fastened to a house wall or a substructure (14), the plate (12) at its lower end having a profile chamber (16) which is square in section in the xy direction and has four side walls a, b1, c and d of different lengths, which are located in horizontal direction, where the side wall b1 of the profile chamber (16) is part of the plate (12) and the angle α between the sides a and b1 is the only right angle in the square profile chamber (16), the angle β between the side walls b and c is an obtuse angle, the length of the side wall c is shorter than the length of the side wall a and in the side wall b1 an indentation (17) is provided