Bunk Bed Frame with Lap-Joint Middle Legs for Compact Shipping
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Solution Overview
Problem
Current bunk bed frames do not optimize international ocean freight furniture shipping, as they are not designed to be compactly packaged for efficient transportation.
Innovation Solution
A bunk bed frame design featuring a lower and upper bed frame with asymmetrical middle legs and ladder legs, utilizing lap connections and notches for stability and compact assembly, allowing for easy disassembly and reassembly to reduce packaging size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional bunk bed frames are designed with standard structural configurations, then manufacturing and assembly are simplified, but shipping volume efficiency is reduced
Solution Approach 1:
The bunk bed frame components are designed to nest within each other during shipping, with the upper bed frame positioned inside or alongside the lower bed frame, and ladder components integrated into the leg structures. This nesting arrangement significantly reduces the overall shipping volume while maintaining manufacturing simplicity through standardized component designs.
Solution Approach 2:
The bunk bed frame is divided into separable segments including legs, crossbars, ladder components, and bed frames that can be independently manufactured and then assembled. This segmentation allows for optimized packaging of individual components and simplifies both manufacturing processes and assembly operations while reducing total shipping volume.
2Volume of moving object
If bunk bed frames are designed for compact shipping, then shipping costs are reduced, but assembly complexity increases
Solution Approach 1:
The frame is segmented into modular components with standardized connection interfaces. Each segment is designed with pre-drilled holes, notches, or attachment points that align during assembly, reducing the need for complex measurements or adjustments. The segmentation enables a systematic assembly process that reduces overall complexity despite the compact shipping design.
Solution Approach 2:
The bunk bed frame incorporates self-aligning features such as notches, tapered connections, or keyed interfaces that automatically guide components into their correct positions during assembly. This self-service mechanism reduces assembly complexity by eliminating the need for precise measurement or complex alignment procedures, even though the components are packaged in a compact configuration.
3Stability of the object's composition
If asymmetrical middle legs with lap connections are used, then structural stability is improved, but manufacturing complexity increases
Solution Approach 1:
The middle legs are designed with asymmetrical lap connections where one leg features an overlapping section that interlocks with the adjacent leg. This asymmetrical configuration provides inherent structural stability through the lap joint mechanism while the legs themselves maintain simple rectangular or square cross-sections that are easy to manufacture using standard milling or extrusion processes.
Solution Approach 2:
The lap connection design merges the middle legs into a unified structural element that spans the width of the bunk bed frame. By combining the legs through the lap joint, the design achieves enhanced stability without requiring complex multi-part assemblies, maintaining manufacturing simplicity through the use of solid, monolithic leg components.
Data Source
AI summary
A bunk bed frame includes a lower bed frame and an upper bed frame. The lower bed frame and the upper bed frame both have four corner legs and at least one pair of middle legs. A rectangular configuration is adapted for a full size mattress. The corner legs and middle legs providing support for the mattress. A middle leg lap vertical splice joint connects the pair of middle legs. The middle leg lap vertical splice joint includes a first lap connection on the upper end of the lower middle leg, a second lap connection on the lower end of the upper middle leg, and a lap interface plane connecting the first and second lap connections.