Freight Rack Portal Supports Manual Folding
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Solution Overview
Problem
The existing freight rack is structurally expensive due to its C-shaped groove design, which leads to pillar inclination and rocking, and requires significant force to fold or erect, necessitating the use of machinery like forklifts.
Innovation Solution
The freight rack employs portal supports with horizontally shiftable members that allow the freight mounting frame to adjust in height and inclination, reducing pillar inclination and enabling manual folding and erection by distributing the weight and force requirement across multiple sets of portal supports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a C-shaped groove pillar structure with rollers is used to allow vertical movement, then the moving body can move smoothly, but the structure becomes expensive and pillars become prone to inclination and rocking
Solution Approach 1:
The invention extracts the roller mechanism from the pillar structure and replaces it with a simple guide groove formed directly on the pillar surface. This eliminates the need for separate rollers and complex C-shaped groove structures, reducing component count and manufacturing cost while maintaining smooth vertical movement capability.
Solution Approach 2:
Instead of using a complex C-shaped groove throughout, the invention applies a simple guide groove only where necessary for guiding vertical movement. The pillar structure maintains its structural integrity with minimal material removal, reducing overall complexity while providing the required movement function.
2Stability of the object's composition
If all pillars and the freight mounting frame are coupled together to be folded or erected simultaneously, then the structure is stable during operation, but a significant amount of force is required necessitating machinery like forklifts
Solution Approach 1:
The invention segments the folding/erection process by allowing pillars to be operated independently rather than requiring simultaneous movement of all pillars and the freight mounting frame. Each pillar can be folded or erected separately, distributing the force requirement across multiple independent operations rather than one large simultaneous operation.
Solution Approach 2:
The invention introduces dynamic flexibility by allowing the freight mounting frame to be temporarily decoupled from pillars during folding/erection operations. This enables a staged process where pillars are positioned first, then the frame is attached, reducing the peak force required compared to moving everything simultaneously.
3Device complexity
If independent pillars are used to support the freight mounting frame, then the structure is simpler, but each pillar is prone to inclination and rocking without sufficient reinforcement
Solution Approach 1:
The invention merges multiple pillars into a combined pillar structure where adjacent pillars are connected or positioned in close proximity. This grouping provides mutual support and stabilization, reducing inclination and rocking of individual pillars while maintaining the overall simplicity of the independent pillar concept.
Solution Approach 2:
The invention adds stability in the horizontal dimension by connecting pillars laterally or positioning them in a configuration that provides mutual bracing. This dimensional approach to stability complements the vertical support function, preventing inclination without requiring complex reinforcement of individual pillars.
Data Source
AI summary
[Problem] Provided is a freight rack that improves rigidity for supporting freight and also allows pillars and a freight mounting frame to be folded or erected on a base member without use of a machine such as a forklift.[Solution] On a base member (10), two sets of portal supports (30), (40), in which right and left pillars (31), (41) and a horizontal member (32), (42) are coupled to each other, stand with an interval in a front and rear direction, where the horizontal member is vertically shiftable along the pillars and fixed to the pillars at a selected height. A freight mounting frame (20) is supported by the horizontal member (42) of one portal support (40) so as to be rotatable in a vertical plane, and is also placed on the horizontal member (32) of the other portal support (30) so as to be movable in the front and rear direction.