Shelving systems
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Solution Overview
Problem
Conventional shelving systems in vehicles have pre-determined tray spacing that cannot be adjusted according to the size and shape of items, leading to inadequate or excessive spacing. Additionally, existing systems lack a reliable mechanism to prevent trays from sliding undesirably during vehicle movements, causing items to fall.
Innovation Solution
The shelving system includes side members, cross members, and guide members that allow containers with adjustable rail locking elements and a handle with a third locking element to move between fixed and translating orientations. This design enables dynamic adjustment of tray spacing and secure locking to prevent unwanted sliding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If tray spacing is pre-determined according to rack configuration, then manufacturing simplicity is improved, but adaptability to different item sizes deteriorates
Solution Approach 1:
The rack system transitions from fixed, pre-determined tray spacing to a dynamic configuration where trays can be moved vertically along the rack. The guide members and locking mechanisms enable trays to be repositioned to different heights, allowing the spacing to adapt to various item sizes while maintaining manufacturing simplicity through standardized components.
Solution Approach 2:
The rack is divided into multiple discrete positioning levels along its length, with each level having guide members that can engage with corresponding features on the trays. This segmentation allows individual trays to be independently positioned at different heights, providing adaptability while keeping the overall rack structure simple and manufacturable.
2Device complexity
If locking mechanism is made small and remote for compact design, then device complexity is reduced, but ease of operation deteriorates
Solution Approach 1:
The locking mechanism is merged with the tray handle assembly. The handle that is naturally grasped by the user for moving the tray also incorporates the locking/unlocking function. This integration allows the locking mechanism to be operated easily with one hand while maintaining a compact overall design, as the handle serves dual purposes.
Solution Approach 2:
The locking mechanism is designed to be automatically engaged when the tray is inserted into the rack, and can be disengaged by a simple manual action on the handle. The spring-loaded detent and cam mechanism provide automatic locking without requiring separate manual intervention, improving ease of operation while keeping the mechanism compact.
3Reliability
If thumb release is pressed down for locking, then reliability of locking is improved, but ease of operation deteriorates when carrying items
Solution Approach 1:
Instead of requiring the user to press the locking mechanism down (which is difficult when carrying items), the design inverts the operation: the locking mechanism is released by pushing up on the handle. This upward motion is more natural and easier to perform even when the user's hands are occupied, while maintaining reliable locking through the spring-loaded detent engagement.
4Ease of operation
If trays are allowed to slide freely for easy access, then ease of operation is improved, but stability during vehicle movements deteriorates
Solution Approach 1:
The tray-rack system implements dynamic locking: trays are locked in place during vehicle transport to prevent sliding and item spillage, but can be easily unlocked and slid when access is needed. The guide members and locking mechanisms provide this dual state, allowing the system to adapt between stability and mobility based on operational requirements.
Solution Approach 2:
The locking mechanism engages automatically or can be easily engaged before vehicle movement to prevent the harmful effect of tray sliding. By establishing the locked state in advance, the system counteracts the potential instability during acceleration, braking, or turning, while still allowing easy access when needed.
Data Source
AI summary
A shelving system includes first and second side members. A cross member is coupled to the side members. A guide member is coupled to the cross member such that the guide member is movable relative to the cross member. A container including a rail is coupled to the guide member. The rail includes a first locking element and a second locking element that is connected to the first locking element. The container includes a handle having a third locking element that engages the first locking element. The locking elements are configured to move the container between a first orientation in which the container is provisionally fixed to the guide member and a second orientation in which the container can translate relative to the guide member.