Collapsible Shelving Assembly with Friction-Controlled Hinge Rotation
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Solution Overview
Problem
Existing collapsible shelving systems face difficulties in controlling the ease and speed of hinge rotation, making it challenging to align and assemble multiple hinges correctly, leading to unmanageable assembly processes.
Innovation Solution
The introduction of a friction plug with a tapered cylindrical shape and a polymer material, which is inserted into the hinge to dampen the rotation speed, providing additional friction and control through a pin axle system, allowing for better management of shelf deployment and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional hinges are used in collapsible shelving, then the structure can be collapsed for shipping, but the assembler cannot control the ease and speed of hinge rotation, making assembly difficult
Solution Approach 1:
A friction plug is introduced as an intermediary element between the hinge blade and the shelf tube. This friction plug acts as a mediator that provides controllable friction to regulate the rotation speed of the hinge, allowing the assembler to control the ease and speed of hinge rotation while maintaining the collapsing functionality for shipping
Solution Approach 2:
The friction plug changes the friction parameter of the hinge mechanism. By introducing a component with specific friction properties, the rotation characteristics of the hinge are modified to provide controlled resistance, enabling the assembler to manage the speed and ease of rotation during assembly while preserving the collapsible nature of the shelving unit
2Productivity
If multiple hinges are used to support shelves, then the shelving can be collapsed flat for packaging, but it becomes difficult to simultaneously control all hinges for proper alignment
Solution Approach 1:
The friction plug serves as a mediator in each hinge, providing consistent friction control across multiple hinges. This allows the assembler to control each hinge independently at a manageable speed, making it feasible to align and assemble multiple hinges simultaneously without overwhelming complexity
Solution Approach 2:
The friction plug provides self-regulating friction control within each hinge mechanism. As the shelf is lowered onto the friction plug during assembly, the friction automatically engages to control the descent speed, eliminating the need for external control mechanisms and allowing the assembler to manage multiple hinges more easily
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 friction plug enhances control over the rotation of shelves, preventing unintentional falls and facilitating orderly assembly by slowing down the rotation speed, making the assembly process more manageable and efficient.
Implementation Method 1
A friction plug is positioned inside the end tube portion and surrounding the blade
Data Source
AI summary
A collapsible shelving assembly with back posts and front posts has one or more shelves attached by hinges to the back posts so that each shelf is configured to rotate about the hinges from an upward collapsed condition to a downward horizontal deployed condition. The fronts post include clips configured to secure the front end of each shelf in the horizontal deployed condition. A friction plug is incorporated into each hinge to slow the speed of rotation and to prevent the shelves from freely falling downwards during assembly.