Flexible Pulling Chain Storage for Rolling Door Jam Prevention
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Solution Overview
Problem
Traditional pulling chain storage devices for scrolling door machines have a rigid structure that easily jams when the chain is pulled by mistake, leading to operational issues during power failures, requiring forceful intervention or device damage for release.
Innovation Solution
A flexible pulling chain storage device design featuring a horizontal tying section with parallel opening sections and flexible suspending arms that allow easy embedding and release of the chain, preventing accidental jamming and enabling smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid structure is used for the tying section, then the chain is securely held in place, but the chain easily jams when pulled accidentally
Solution Approach 1:
The tying section is transformed from a rigid static structure to a dynamic flexible structure that can adapt its state based on applied force. The flexible material allows the tying section to deform and release the chain when excessive force is applied, while maintaining secure holding under normal conditions.
Solution Approach 2:
The physical state of the tying section is changed from rigid to flexible by selecting appropriate material properties. This parameter change allows the structure to transition between holding and releasing states based on the magnitude of applied force, solving the contradiction between secure holding and easy release.
2Strength
If a rigid tying section is used, then the structure is simple and strong, but it requires forceful intervention or device damage for chain release during power failures
Solution Approach 1:
The material parameter of the tying section is changed from rigid to flexible, enabling the structure to maintain strength while allowing easy chain release through material deformation rather than structural damage or forceful intervention.
Solution Approach 2:
The potential harm of accidental chain pulling is converted into a beneficial feature where the flexible material absorbs the impact force through deformation, preventing damage to the overall structure while enabling automatic or easy chain release.
3Ease of manufacture
If the opening section has a uniform width, then the manufacturing is simple, but the chain cannot be easily embedded or released
Solution Approach 1:
The opening section is designed with asymmetric width variation, being wider at the external end for easy chain insertion and narrower at the internal end for secure holding. This asymmetric geometry simplifies both manufacturing (single piece molding) and operation (easy embedding and release).
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 flexible design prevents chain jamming and allows for easy release, enhancing safety and operational reliability by absorbing forces and preventing damage to the storage device.
Implementation Method 1
the suspending arms are flexible structures and have good buffer properties
Data Source
AI summary
A pulling chain storage device for a scrolling door machine is provided to tie the chain that can be pulled manually when the scrolling door machine is malfunctioned. The storage device includes a vertical fixing section at an end and a horizontal tying end at the other end, and the tying section includes at least one opening section, and the opening section includes an external end and an internal end, and the width of the opening section is tapered from the external end to the internal end, such that a pairs of suspending arms are formed between the internal end of the opening section and the hollow hole, so as to tie a chain to a flexible suspending arm and prevent the chain from being jammed in the storage device. The chain can be easily released even if the chain is jammed.