Finishing Strip Holder with Wall Claws for Anti-Levering
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Solution Overview
Problem
Existing fastening devices for end strips between a wall and flooring allow holders to be easily levered out of the connection joint during installation, posing a risk of accidental dislodgment.
Innovation Solution
The holder design includes a wall web with a punched-out slope lug and claws that engage with the wall to prevent upward sliding, combined with a latching mechanism to secure the end strip, ensuring the holder remains fixed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the holder is designed with simple holding webs that engage in grooves of the end strip, then the installation is simple and requires no tools, but the holder can be easily levered out of the connection joint
Solution Approach 1:
The wall limb is segmented into multiple functional elements: holding webs for end strip engagement, spreading arms for wall pressing, and a wall web with claws for anti-levering. This segmentation allows each element to perform its specific function independently, achieving both simple installation and reliable stability.
Solution Approach 2:
The wall web acts as an intermediary element between the wall limb and the wall surface. It transmits the pressing force from the spreading arms to the wall and provides claws that engage with the wall to prevent leveraging, thus mediating the connection between the holder and the wall structure.
2Force
If spreading arms are attached to the wall limb to press against the flooring, then the holder is supported under pretension, but the contact teeth cannot prevent the holder from being levered out
Solution Approach 1:
The anti-levering function is separated from the pressing function. The spreading arms provide pressing force against the flooring, while the wall web with claws provides the anti-levering capability by engaging with the wall. This functional segmentation resolves the contradiction between providing force and preventing leveraging.
Solution Approach 2:
The wall web serves as an intermediary that translates the pressing action into effective anti-levering engagement. The claws on the wall web engage with the wall surface to prevent leveraging, while the wall web itself is displaced by the pressing action to ensure effective engagement.
3Reliability
If the wall web is punched out of the wall limb with claws, then the holder is prevented from sliding upwards, but the structure becomes more complex
Solution Approach 1:
The wall web is designed as a thin, flexible element that can be punched out of the wall limb. This thin-film approach provides the necessary claws for anti-sliding engagement while maintaining structural simplicity. The flexibility allows the wall web to be displaced by the pressing action, ensuring effective claw engagement without adding significant structural complexity.
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 design effectively prevents the holder from being levered out and the end strip from being unintentionally removed, providing secure fastening without tools.
Implementation Method 1
two leaf spring-like spreading arms which are attached laterally to the wall limb and project towards the end face of the flooring
Implementation Method 2
the end strip runs onto the projecting slope lug of the wall web punched out of the wall limb of the holder with the effect that that the wall web is pressed separately from the wall limb against the wall
Implementation Method 3
the claws of the wall web provided on this bottom edge to penetrate into the wall and thereby prevent the wall limb from sliding upwards along the wall
Data Source
AI summary
A device for fastening an end strip (1) covering a connection joint (4) between a wall (5) and a flooring (6) has a holder that forms a wall limb (2) The holder has at least one upwardly projecting holding web (9) engaging in a downwardly open groove (10) of the end strip (1) for clampingly receiving the end strip (1), and having two leaf-spring-like spreading arms (3) attached laterally to the wall limb (2) and projecting towards the end face (7) of the flooring (6). The holder comprises a wall web (12) punched out of the wall limb (2) and delimited by a bottom edge (13) on the floor side and two side edges (14) extending from this bottom edge, the bottom edge (13) of which wall web (12) is provided with claws (17) projecting towards the wall (5), and the wall web (12) has, at a distance in height from the bottom edge (13), a slope lug (15) for the end strip (1) projecting from the wall limb (2).