Rolling Door Cable Drum for Protected Power Connection
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Solution Overview
Problem
Existing movable barriers, such as roller doors and sectional doors, face challenges in ensuring a secure and reliable electrical connection that remains intact and protected from external damage while maintaining mobility, particularly in conventional systems with cable-based connections.
Innovation Solution
A drum device is used to wind and unwind an electrical connecting line, with a fixed mounting on the frame and strategically positioned guides to ensure the line's secure routing and minimal external accessibility, combined with a spring-loaded drum for automatic winding and rotatable guide rollers to prevent kinking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the electrical connecting line is routed freely with the movable barrier, then mobility is improved, but the risk of damage from external influences increases
Solution Approach 1:
A drum device is introduced as an intermediary component between the movable barrier and the stationary enclosure. This drum device selectively winds and unwinds the electrical connecting line, serving as a mediator that enables controlled movement while protecting the cable. The drum device with its guide means acts as the intermediary structure that resolves the contradiction between mobility and protection.
2Object-affected harmful factors
If the connecting line is tightly routed to the barrier, then protection is improved, but mobility is reduced
Solution Approach 1:
The drum device is designed to dynamically adjust the routing of the electrical connecting line based on the position of the movable barrier. As the barrier moves, the drum selectively winds or unwinds the cable, maintaining optimal protection while accommodating full range of motion. This dynamic adjustment mechanism resolves the static contradiction between tight routing and mobility.
3Strength
If the drum device is fixedly mounted on the enclosure, then tensile forces are diverted from the connecting line, but the complexity of the system increases
Solution Approach 1:
The drum device is fixedly mounted directly on the stationary enclosure, merging the support function into the existing structural element. This integration allows the robust enclosure to bear the tensile forces instead of the flexible connecting line, while avoiding the need for separate support structures. The mounting brackets serve as a simple integration mechanism that combines multiple functions.
4Reliability
If guide means are added to the drum device, then kink protection is improved, but the device complexity increases
Solution Approach 1:
Guide means are added at specific critical locations on the drum device where the electrical connecting line enters and exits. Rather than providing continuous guidance along the entire path, the guide means are strategically positioned at points most susceptible to kinking. This localized approach provides necessary protection while minimizing overall structural complexity.
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 solution provides a spatially defined, protected, and efficient electrical connection that minimizes damage risk and ensures reliable operation across all positions, with a compact and kink-resistant design.
Implementation Method 1
The drum is preferably spring-loaded in a winding direction. The drum, thus preloaded, rotates automatically as soon as it allows movement of the barrier and thus a change in the position of the connecting line.
Data Source
Figure 1
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AI summary
The invention relates to a movable barrier, such as a roller shutter or a sectional door, which serves to close an opening of a stationary enclosure, wherein an electrical connecting line is led from the stationary enclosure to the movable barrier and wherein a drum device is provided for selectively winding and unwinding the electrical connecting line.