Wedge Clamping Device with Chamfered Soft Surface
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Solution Overview
Problem
Existing clamping devices for windows and doors often struggle to be easily placed between a floor and a door leaf with a good clamping effect, due to complex slide and grip force ratios, and can be displaced by a swinging door, preventing effective clamping.
Innovation Solution
A clamping device featuring a soft sliding surface with a lateral chamfer and a ribbed structure on the underside, allowing easy placement under a door leaf with minimal force and providing a high clamping force once in position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a clamping device is placed between floor and door leaf, then clamping effect is achieved, but placement requires excessive force and is difficult
Solution Approach 1:
The soft sliding surface is chamfered to fall away laterally outwardly, creating a ramp-like structure that allows the door leaf to slide onto the base body from above. This dimensional change in the sliding surface geometry enables easy placement by converting vertical sliding motion into effective clamping, eliminating the need for excessive placement force.
Solution Approach 2:
The soft sliding surface material properties are optimized to provide appropriate friction characteristics. The material softness and friction coefficient are tuned to allow easy sliding onto the device while maintaining sufficient grip once in position, changing the friction parameter to resolve the placement difficulty.
2Force
If adhesive friction is increased to improve clamping, then clamping force increases, but door sliding becomes difficult
Solution Approach 1:
Different regions of the sliding surface have different friction characteristics. The soft sliding surface material is selected to provide high adhesive friction for clamping when the door is stationary, while the chamfered geometry and ribbed structure on the underside create low-friction zones that facilitate easy sliding during placement. This local differentiation of friction properties resolves the contradiction.
Solution Approach 2:
The friction characteristics of the sliding surface are dynamic rather than static. During placement, the door sliding action reduces friction through the chamfered geometry and ribbed structure. Once the door is in position and clamping is required, the soft material engages with high adhesive friction. This dynamic friction behavior allows the system to transition between easy sliding and strong clamping.
3Stability of the object's composition
If a hard sliding track is used, then structural stability is improved, but adhesive friction is too strong causing difficult placement
Solution Approach 1:
The base body combines a hard core element providing structural stability with a soft sliding surface material providing appropriate friction characteristics. This composite construction allows the hard core to maintain structural integrity while the soft outer layer enables easy placement through controlled friction and chamfered geometry. The ribbed structure on the underside further modifies the friction characteristics to facilitate placement.
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 device can be easily pushed under a door leaf with little force and deploys a high clamping force, effectively preventing door movement while allowing easy sliding of the door onto and off the device.
Implementation Method 1
a soft sliding surface with adhesive friction
Data Source
AI summary
The invention relates to a clamping device for windows (22) and/or doors (23), said clamping device comprising: a wedge-like main body (1) having a bottom side (2), a top side (3), a core element (4) and a casing element (5), the heights (1a) of side outer surfaces (6a, 6′a) of the main body (1) increasing from a flat region (1b) in the direction (A) of a high region (1c) in such a way that the main body (1) forms a wedge, and the core element (4) forming a hard sliding track (4a) on the top side (3) and the casing element (5) forming a soft sliding surface (5a) on the top side (3). The aim of the invention is to provide a clamping device which not only combines a stable construction with good clamping properties but which can also be brought into its use position as easily as possible. The invention is characterised in that the soft sliding surface (5a) is chamfered or bevelled in such a way that it slopes laterally outwards in the direction of the side outer surfaces (6a) and/or in that the casing element (5) has a rippled structure (8) on the bottom side (2).