Formwork Hinge Joint for Inclined Concrete Surfaces
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Solution Overview
Problem
Traditional formwork systems are ill-suited for forming inclined surfaces due to gaps between forming panels, which can lead to safety hazards and inefficiencies in concrete surface formation.
Innovation Solution
A formwork system with height-adjustable supports and a hinge joint mechanism that maintains a consistent axis of rotation for mounting pins, allowing for predictable gap variance with beam inclination, enabling the use of a single compensation-strip across varying incline angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional formwork systems are used to form inclined surfaces, then the system can be applied to various concrete structures, but gaps form between forming panels leading to safety hazards and inefficiencies
Solution Approach 1:
The support arm is designed to be adjustable in length and position, allowing the system to dynamically adapt to different incline angles while maintaining consistent panel spacing. The mounting pin can be repositioned along the support arm to compensate for changes in panel position caused by inclination variations.
Solution Approach 2:
The formwork system uses standardized support arms and mounting pins that can function across multiple incline angles (0-30 degrees), eliminating the need for different compensation strips for each angle. The same support structure universally handles both horizontal and inclined surfaces.
2Ease of manufacture
If traditional formwork systems with fixed support structures are used, then the structure is simple and easy to manufacture, but multiple types of compensation-strips are required for different incline angles
Solution Approach 1:
A single type of compensation-strip is designed to work across all incline angles from 0 to 30 degrees. The universal support arm and mounting pin system allows the same compensation-strip to accommodate varying panel positions without requiring angle-specific variants.
Solution Approach 2:
The system changes the position parameter of the mounting pin along the support arm to accommodate different incline angles. By adjusting where the mounting pin is located on the support arm, the system compensates for inclination effects while using the same compensation-strip design.
3Ease of operation
If forming panels are allowed to touch each other on inclined surfaces, then the installation is simpler, but the gap sizes become unpredictable and unsafe
Solution Approach 1:
The support arm length and mounting pin position are dynamically adjusted based on the incline angle to maintain consistent gap sizes. This dynamic adjustment allows panels to be installed without touching while ensuring predictable, safe spacing across all incline conditions.
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 system ensures consistent and predictable gap sizes between forming panels, enhancing safety and efficiency in forming inclined concrete surfaces by accommodating different incline angles with adjustable support arms and sockets, reducing the need for multiple compensation-strips.
Implementation Method 1
each of the first and second sockets permitting rotation of a received mounting pin about a pin axis while retaining the received mounting pin so that its axis of rotation remains substantially invariant as the received mounting pin rotates in the socket
Data Source
AI summary
A formwork system includes a height-adjustable support for supporting a beam in substantially horizontal or slightly inclined position that includes a support with a central upstanding member and a support arm. The support arm has a rounded socket, and the beam has a cylindrical mounting pin proximate its end. The socket and mounting pin are shaped and sized so that the mounting pin is retained within the socket and they together form a hinge joint. As the mounting pin is retained by the socket of the support arm, it does not shift laterally relative to the support arm as the support arm is vertically adjusted. The variance in the gap between laterally secured forming panels as a response to vertical shift of the support is dependent on the incline angle of the beam and the dimensions of the beam and the support arm. This is predictable within a defined tolerance.