Self-Erecting Zipper Lift Mechanism for Stage Columns
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Solution Overview
Problem
Existing self-erecting columns for stage applications require external guidance to prevent collapse and often exhibit slow and jerky movement, making them unsuitable for applications needing smooth operations.
Innovation Solution
A self-erecting lift mechanism where two separately stored spiral chains interlock like a zipper to form a rigid vertical column, eliminating the need for external guidance and allowing for smooth extension without external support, using machined link sprockets with pivot and interlocking surfaces for structural strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If external guidance is used to prevent collapse of self-erecting columns, then structural stability is improved, but device complexity and ease of operation are worsened due to requiring external support structures
Solution Approach 1:
The column is divided into multiple telescoping segments that can be stored compactly and deployed sequentially. Each segment contains interlocking features that engage with adjacent segments, providing structural stability without external guidance. The segmented design allows the column to support its own weight and maintain rigidity through the interlocked joints between segments.
Solution Approach 2:
The telescoping segments are nested within each other during storage, with smaller segments fitting inside larger ones. This nesting arrangement provides compact storage while enabling the segments to extend outward in a controlled sequence to form the full-height column structure, eliminating the need for external guidance structures.
2Ease of operation
If ribbon lift is used for extension without guidance, then ease of operation is improved, but speed and smoothness of operation are worsened due to slow and jerky movement
Solution Approach 1:
The extension mechanism uses dynamic control to manage the deployment of telescoping segments. Motors or actuators control the extension speed and sequence, allowing smooth acceleration and deceleration during deployment. The system can pause at intermediate positions and control the timing of each segment's extension, eliminating jerky movements while maintaining ease of operation through automated control.
Solution Approach 2:
Sensors and control systems monitor the extension process in real-time, detecting the position and status of each segment. The feedback information is used to adjust motor speeds and timing, ensuring smooth coordination between segments during extension. This feedback control prevents jerky movements and allows the system to maintain optimal extension speed while ensuring safe and controlled deployment.
3Strength
If telescoping segments with interlocking features are used, then structural strength is improved, but manufacturing complexity is worsened
Solution Approach 1:
The column is divided into standardized telescoping segments with repeating interlocking features. Each segment is manufactured as a separate component with identical or similar interlocking mechanisms, allowing for modular production. The segments can be manufactured using standard machining or forming processes, and the repetitive nature of the interlocking features simplifies tooling and production planning while ensuring consistent structural strength across all joints.
Data Source
AI summary
A zipper style lift that coils into a box for storage, but extends to form a rigid, self erecting lift part. The lift stores itself in a housing when retracted, by retracting chain parts into a spiral form.