Resin Container Concave Portions Localized Reinforcement
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Solution Overview
Problem
The reduction in wall thickness of resin containers for weight reduction leads to decreased strength, causing concave portions to bulge outward when contents apply pressure and deform during handling or distribution, making them difficult to hold and prone to deformation.
Innovation Solution
A resin container design featuring concave portions with a bottom face, upper and lower inclined faces that converge towards the bottom, a vertical groove from the bottom face to the lower inclined face, lateral grooves on the bottom face, and vertical ridge portions on either side, along with wavelike inclined faces to distribute stress and prevent deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If wall thickness is reduced for weight reduction, then weight of container is reduced, but strength of container is reduced
Solution Approach 1:
The patent applies local quality by providing reinforced structures (ridges and grooves) specifically at the concave portions where gripping occurs, while maintaining thinner wall thickness in other areas. This localized reinforcement strengthens the critical gripping zones without requiring overall wall thickening, thus reducing weight while maintaining strength where needed.
Solution Approach 2:
The patent segments the container wall structure by introducing distinct reinforced elements (ridges and grooves) as separate features from the main wall. These segmented reinforcement elements can be independently designed and positioned to provide targeted strength enhancement at concave portions without increasing the overall wall thickness uniformly.
2Ease of operation
If concave portions are provided for gripping, then ease of operation is improved, but deformation of concave portions occurs under force
Solution Approach 1:
The patent provides localized reinforcement through ridges and grooves specifically at the concave portions to prevent deformation while maintaining the gripping function. The ridges extend vertically along the inclined faces and the grooves extend laterally across the bottom face, creating a reinforced pattern that stabilizes the concave structure against outward bulging forces.
Solution Approach 2:
The patent employs curved surfaces by forming the inclined faces with gentle slopes rather than sharp angles. The smooth curved transitions in the inclined faces help distribute stress more evenly, preventing stress concentration that would lead to deformation, while still providing the necessary gripping surface.
3Weight of moving object
If wall thickness is reduced, then weight is reduced, but resistance against shock and load is reduced
Solution Approach 1:
The patent segments the load-bearing structure by introducing separate reinforced elements (ridges and grooves) that act as stress distribution networks. These segmented features create multiple load paths that distribute shock and load forces throughout the concave portions and surrounding areas, enhancing reliability without requiring increased wall thickness.
Solution Approach 2:
The ridges and grooves are designed beforehand as cushioning structures that absorb and distribute shock loads before they can cause deformation. The reinforced geometry creates a protective framework that cushions against sudden impacts and sustained loads, maintaining container integrity during handling and distribution.
Data Source
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AI summary
In a container formed of resin in which a concave portion 12 is provided adjacent a vertical center portion of a body portion 4, the concave portion 12 includes a bottom face 13, an upper inclined face 14 continuous from an upper side of the bottom face 13 and a lower inclined face 15 continuous from a lower side of the bottom face 13, and the upper inclined face 14 and the lower inclined face 15 are inclined such that these upper and lower inclined faces 14, 15 are located closer to each other toward the bottom face 13 side, inclination of the lower inclined face 15 is set smaller than inclination of the upper inclined face 14, and there is provided a vertical groove 18 extending from the bottom face 13 to the lower inclined face 15.