Pull-Out Guide Support Element Design to Prevent Runner Tilting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pull-out guides face issues with sudden lowering of the running rail when a tipping point is reached, due to varying support widths and unpredictable tipping points caused by weight and load variations, leading to abrupt tilting movements, especially in short guides.
Innovation Solution
A pull-out guide design featuring a support element with a guide part and a support part that is displaceable along a recess on the middle rail, maintaining a constant or increasing support width by moving relative to the middle rail, and incorporating a rotatable roller for smooth movement and low friction, with a web on the running rail to prevent rearward lifting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a roller is rigidly fixed to the center rail to prevent lifting, then the support function is provided, but the support span varies causing abrupt tilting movements
Solution Approach 1:
The support element is made movable along the center rail instead of being rigidly fixed. The guide part with guide surface allows the support element to slide dynamically, maintaining a constant support span while still preventing lifting at the tipping point. This dynamic adjustment eliminates abrupt tilting movements.
2Stability of the object's composition
If the support element is movable on the center rail, then the support span is maintained constant, but the device complexity increases
Solution Approach 1:
The support element is divided into two functional parts: a guide part with a guide surface for sliding movement, and a support part with a support surface for preventing lifting. This segmentation allows each part to perform its specific function efficiently while keeping the overall structure relatively simple.
3Reliability
If additional support profiles are welded to the center rail, then lifting prevention is achieved, but the manufacturing complexity increases
Solution Approach 1:
The guide part and support part are combined into a single integrated support element that performs both functions: guiding the movement along the rail and preventing lifting through the support surface. This merging eliminates the need for separate welded support profiles, simplifying manufacturing and assembly.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces sudden lowering of the running rail by maintaining a consistent support width and preventing rearward lifting, ensuring stable operation across the entire travel path of the running rail, even at unknown tipping points, thereby enhancing the stability and reliability of the pull-out guide.
Implementation Method 1
the guide part of the support element is slidably guided on a guide on the central rail
Implementation Method 2
a guide rail (2), a center rail (3) and a running rail (4), which are movable relative to one another and are preferably made of bent sheet steel
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
The invention relates to a pull-out guide (1) comprising a guide rail (2), which can be fixed to a furniture carcass, a central rail (3), which is mounted so as to be movable on the guide rail (2), and a runner (4), which is mounted so as to be movable on the central rail (3) and to which a drawer element can be fixed, wherein at least one support element (13) is arranged between the runner (4) and the central rail (3), which support element limits rear-side lifting of the runner (4) when a tilting point is reached when the runner (4) is moved in a pull-out direction, wherein the support element (13) comprises a guide part (23) and a support part (19) adjacent thereto, and the guide part (23) of the support element (13) is movably guided on a guide (14) on the central rail (3). As a result of the invention, sudden tilting of the runner can be prevented during a movement of the pull-out guide in a pull-out direction.