Corner Cupboard Rotary Shelf Fitting Without a Central Support Column
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Solution Overview
Problem
Existing rotary fittings for corner cupboards restrict the usability of installation areas due to a central support column that limits shelf rotation and requires additional reinforcements, and they often do not allow for independent rotation of individual shelves.
Innovation Solution
A rotary fitting design where each shelf has its own pivot bearing supported by two horizontally aligned support arms attached to the side walls of the corner cabinet, eliminating the need for a central support column and enabling independent rotation of each shelf.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a central support column is used to support shelves in a corner cupboard, then the shelves can be supported vertically, but the installation area of the shelves is severely limited and additional reinforcements are required
Solution Approach 1:
The invention extracts the support function from the floor and ceiling and relocates it to the side walls. The support column is replaced by support arms that extend horizontally from the side walls to support the shelves, eliminating the need for a central vertical support structure that would obstruct the installation area.
Solution Approach 2:
The support structure transitions from a vertical dimension (support column extending through floor and ceiling) to a horizontal dimension (support arms extending from side walls). This dimensional shift allows the shelves to utilize the full vertical space without being constrained by a central support column.
2Strength
If a central support column extends through the shelves, then the shelves can be supported, but the support column hinders the free use of installation areas
Solution Approach 1:
The support function is extracted from the central vertical column and redistributed to horizontal support arms attached to the side walls. This removes the obstructive element from the center of the installation area, allowing unobstructed access and utilization of the shelf surfaces.
3Stability of the object's composition
If all shelves are rotated synchronously with a crankshaft-like support column, then the support structure remains stable, but individual shelves cannot be rotated separately
Solution Approach 1:
The unified support column system is segmented into individual support arms for each shelf. Each support arm is independently attached to the side walls and supports its corresponding shelf, allowing each shelf to rotate independently while maintaining overall structural stability through the distributed support configuration.
Solution Approach 2:
The support structure transitions from a rigid synchronous rotation mechanism to a dynamic system where each shelf can rotate independently on its own support arms. The side wall attachments provide stable anchoring while allowing individual rotational movement of each shelf unit.
4Ease of operation
If the support column is mounted on the floor and ceiling with pivot bearings, then the shelves can rotate, but reinforcements and auxiliary constructions are required to ensure stability
Solution Approach 1:
The pivot bearing mechanism is extracted from the floor and ceiling mounting and relocated to the side walls. The support arms are attached to the side walls with pivot bearings that enable rotation, eliminating the need for complex floor and ceiling reinforcements while maintaining rotational functionality.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The fitting (1) has a pivot bearing (5) that defines a stationary vertical pivot axis (4) for a shelf board (2) that includes a horizontally running positioning surface (3). The pivot bearing is supported on two horizontally aligned support arms (8), which are rigidly engage with one end on the pivot bearing. The support arms include an angle of 120 to 160 degrees at the pivot bearing and are fixed with another end (10) at lateral walls (16) of a corner cupboard (14), where the lateral walls extend perpendicularly to each other. Each support arm exhibits a straight run between the ends.