Door Drive Tensioning Mechanism Inversion for Burglary Protection
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Solution Overview
Problem
Existing door drive systems face difficulties in facilitating the clamping process and providing adequate burglary protection, as the tensioning mechanism is often inaccessible and vulnerable to external access through gaps between the door frame and leaf.
Innovation Solution
The deflection roller is positioned at the end of the door drive away from the door opening, allowing for easy access and tensioning within a closed environment, with a spindle and nut mechanism for continuous tensioning, and the use of toothed belts for maintenance-free operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the tensioning mechanism is arranged at the end of the door drive facing the door opening, then the clamping process can be performed during assembly, but the mechanism becomes inaccessible and vulnerable to burglary from the outside
Solution Approach 1:
The patent inverts the conventional arrangement by placing the first deflection roller and tensioning mechanism at the end of the door drive remote from the door opening instead of at the end facing the door opening. This inversion allows the clamping process to remain accessible during assembly while simultaneously providing burglary protection, as the mechanism is now located within the building where it cannot be accessed from the outside through gaps between the door leaf and frame.
2Ease of operation
If the first deflection roller is made displaceable for tensioning the traction means, then the clamping process is facilitated, but the device complexity increases
Solution Approach 1:
The patent implements a self-service tensioning mechanism where the first deflection roller is displaceably coupled to the drive or running rail via a displacement element. This allows the mechanism to automatically tension the traction means through its own displacement capability, eliminating the need for external adjustment mechanisms and reducing overall device complexity while facilitating the clamping process.
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
This configuration simplifies the clamping process while enhancing burglary protection by securing the tensioning mechanism within the building, ensuring optimal tension and reduced maintenance needs.
Implementation Method 1
a spindle and nut mechanism for continuous tensioning
Data Source
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AI summary
The gate drive has a traction unit e.g. chain, moved by a drive (11) and staying in connection with a gate leaf so that the gate leaf is moved by a movement of the traction unit. A belt pulley (30) is arranged at an end of the gate drive detached from a gate opening. Another belt pulley (40) is arranged at an end of the gate drive turned towards the opening. The traction unit is rotated at the belt pulleys. One of the belt pulley for clamping the traction unit is moved away from the other belt pulley perpendicular to rotary axes (D1, D2) of the belt pulleys.