Load Transfer Device with Pre-Assembled Bearing Part
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Solution Overview
Problem
Existing load transfer devices for sash windows and French doors require the support device to be installed after the sash is mounted, necessitating a temporary opening without support, which is inconvenient and inefficient.
Innovation Solution
A load transfer device design where a holding part is attached to the frame or sash, allowing the bearing part to be coupled pre-assembled, with a connection to the holding part that is weaker than to the base part, ensuring the holding part connection fails during the first movement into the rotary opening position, enabling immediate support of the sash weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the support device is installed after the sash is mounted, then the installation process is simplified, but the sash cannot be opened in the first time without support
Solution Approach 1:
The bearing part is pre-assembled and temporarily coupled to the holding part before final installation. This preliminary coupling allows the support device to be ready in advance, and upon first opening movement, the temporary coupling breaks to activate the permanent support connection, ensuring both ease of assembly and reliable support capability
2Stability of the object's composition
If the connection of bearing part to holding part is strong, then the pre-assembly is stable, but the connection cannot break during first movement
Solution Approach 1:
The connection between bearing part and holding part is designed with non-uniform strength characteristics - the temporary coupling has controlled weakness at specific locations (breaking points) that allows it to break during first movement, while other connections remain strong for stability. This local differentiation of connection strength resolves the contradiction between pre-assembly stability and first movement capability
3Productivity
If the support device is mounted pre-assembled, then installation is simplified, but additional components are required
Solution Approach 1:
The connection system is segmented into two distinct parts: a temporary coupling for pre-assembly that breaks during first movement, and a permanent support connection that remains after breaking. This segmentation allows the device to function with pre-assembled components while managing the complexity through functional separation of temporary and permanent connections
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The load transfer device (3) has a frame-side fitting portion (4) and a wing-side fitting portion (5) with which a supporting device (6) is coupled. The frame-side fitting portion or wing-side fitting portion includes a base. A bearing portion is connected with the base in closing position of a wing (2) and is coupled at the supporting device. The bearing portion is coupled with a holding element in a pre-assembly such that the connection strength between the bearing portion and holding element is lower than the connection strength of the bearing portion with base.