Rotatable Container Upper Walls Locking Mechanism

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Solution Overview

Problem

Existing container designs face issues with unexpected opening of upper walls and wrinkles on resin molded bodies due to gaps between core layers and outer materials, particularly in structures with standing walls.

Innovation Solution

A container design featuring rotatable upper walls with a locking mechanism and a structure with a concave portion at the base to accommodate a core material within a resin molded body, preventing unexpected opening and suppressing wrinkles by enhancing welding strength between the core material and the resin molded body.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the upper walls are made rotatable with respect to the side walls, then the ease of operation is improved, but the reliability deteriorates due to unexpected opening

Engineering Contradiction:

Improveease of opening upper wallsVSAvoidstability of upper walls

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The upper walls are designed to be rotatable relative to the side walls, allowing dynamic movement between closed and open positions. This dynamic configuration improves ease of operation while the locking member provides stability when needed.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

A locking member is introduced as an intermediary component between the upper walls and side walls. This locking member includes a fixed portion attached to the side wall and an engagement portion that can engage with the upper wall to prevent unexpected opening, thus resolving the contradiction between rotatability and stability.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Strength

If a standing wall is provided in the resin molded body, then the structural integrity is improved, but the manufacturing precision deteriorates due to wrinkles and ripples

Engineering Contradiction:

Improvestructural integrity of standing wallVSAvoidsurface quality of resin molded body

Core Design Contradiction:

StrengthVSManufacturing precision

Solution Approach 1:

A concave portion is formed in advance at the base of the standing wall during the molding process. This preliminary structural feature allows the core material to be properly positioned and welded to the resin molded body before cooling occurs, preventing wrinkles and ripples while maintaining structural integrity.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The concave portion is specifically located at the base of the standing wall where it connects to the core material. This localized structural modification addresses the welding and surface quality issues at the critical junction without affecting the overall standing wall structure or its integrity.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11964794B2Container and structure

Publication Date: 2024.04.23 KYORAKU CO LTD

AI summary

A container capable of suppressing the unexpected opening of a pair of upper walls including a first side wall and a second side wall facing each other; a third side wall provided therebetween; a first upper wall and a second upper wall; and a locking member. The first side wall and the second side wall face each other. The first upper wall and the second upper wall are configured to be rotatable with respect to the first side wall and the second side wall, respectively. The locking member includes a fixed portion and an engagement portion, the fixed portion being fixed to the third side wall, the engagement portion being engaged with at least one of the first upper wall and the second upper wall to prevent the first upper wall and the second upper wall from opening.