Modular Metallic Profiles for Tool-Free Load-Bearing Rack Assembly
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Solution Overview
Problem
Existing load-bearing structures for shelves and racks are difficult to manufacture, heavy, and challenging to clean, with complex and aesthetically unpleasing connections that require specialized tools and are prone to leakage and instability under stress or vibration.
Innovation Solution
The use of metallic profiles with tubular and T-shaped cross-sections for vertical posts and connecting elements, featuring inwardly bent legs and elongated holes for secure, invisible connections that are easy to assemble and disassemble without tools, ensuring stability and ease of cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If complex connection systems with multiple U-profiles and interlocking mechanisms are used, then structural stability is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The connection system is divided into discrete modular components: individual posts with integrated connection elements, separate shelves, and distinct mounting brackets. Each component can be manufactured independently using standard extrusion processes, then assembled through simple insertion and locking mechanisms, reducing overall system complexity while maintaining stability.
Solution Approach 2:
Connection elements are nested within the profile structures themselves - mounting brackets are inserted into post cavities, shelves nest onto connection rails, and locking mechanisms are integrated within the profile walls. This nesting eliminates separate fastening hardware and reduces the number of discrete parts.
2Strength
If heavy-duty metallic profiles with thick walls are used, then load-bearing capacity is improved, but weight increases
Solution Approach 1:
The profile walls have varying thicknesses optimized for local requirements: thicker walls at connection points and load-bearing zones, thinner walls in non-critical sections. This localized reinforcement maintains overall strength while minimizing total material usage and weight.
Solution Approach 2:
The structure combines different metallic materials with complementary properties - high-strength aluminum alloys for load-bearing posts, lighter gauge metal for shelves and connectors. This composite approach optimizes the strength-to-weight ratio across different structural elements.
3Adaptability or versatility
If multiple vertical joints and connection points are provided, then adaptability and adjustability are improved, but cleaning difficulty and susceptibility to dirt accumulation increase
Solution Approach 1:
Connection and adjustment mechanisms are extracted from the external profile surfaces and relocated to the interior cavities of the posts. Adjustment slots, mounting brackets, and connection points are all positioned inside the profile walls, creating a smooth external surface that prevents dirt accumulation while maintaining full adjustability.
4Ease of manufacture
If simple extrusion profiles are used, then ease of manufacture is improved, but connection stability and structural rigidity worsen
Solution Approach 1:
Multiple functions are merged into single extrusion profiles: structural support, connection mounting, adjustment mechanisms, and locking features are all integrated into the profile design itself. This eliminates the need for separate fastening components while maintaining connection stability through the unified extruded structure.
Data Source
Figure 1~2
Figure 3~3b
Figure 4~6
AI summary
11. Profiles for assembling load-bearing structures consisting of posts (1), connecting elements or cantilever elements (2), longitudinal beams (4) and/or shelves (3) which can be attached to the connecting elements or cantilever elements (2) or to the longitudinal beams (4), wherein the legs (1a) of the posts (1) abut each other or are spaced apart from each other by a distance corresponding to the thickness of the hanging element (2i), without hanging projections, of the connecting element or cantilever element (2) attachable to the post, wherein both of said legs (1a) have elongated holes or openings (1c) which are identical in shape and arrangement on both legs, and wherein the hanging element (2i) of the connecting element or cantilever element (2) is provided with hanging projections (2c) projecting on both sides which are shaped such that these,the hanging elements (2i) inserted between the elastically expandable legs (1a) of the post (1) penetrate and hook into the elongated holes or openings (1c) provided on both legs (1a).