U-Shaped Clip for Tool-Free Panel Attachment to Posts
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Solution Overview
Problem
Existing road sign fixing devices are expensive, inconvenient to use, and require tools for installation, making them time-consuming to set up.
Innovation Solution
A U-shaped fixing collar with parallel wings, a web, hooks, and a notch that allows for tool-free association of a panel with a post, using a C-shaped rail and internal housing for secure attachment without the need for tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional fixing device with multiple parts (fixing rail, flange, bolts) is used, then the panel can be securely attached to the post, but the device becomes expensive and complex
Solution Approach 1:
The patent merges the fixing rail, flange, and fastening elements into a single integrated collar component. The collar comprises a body with two wings that can be inserted into the C-shaped rail, eliminating the need for separate flanges and multiple bolts. This consolidation reduces the number of parts while maintaining secure attachment functionality.
Solution Approach 2:
The collar is designed as a multi-functional component that simultaneously performs multiple functions: it acts as a flange to wrap around the post, a fastening mechanism with integrated bolts, and a positioning device with notches and blocking members. This universal design replaces multiple specialized parts with one versatile component.
2Reliability
If a conventional fixing device with multiple parts and tools is used, then secure attachment is achieved, but installation becomes time-consuming and inconvenient
Solution Approach 1:
The collar is pre-assembled as a complete unit with all fastening elements (bolts, notches, blocking members) already in place. This preliminary preparation allows for rapid installation where the entire collar can be positioned and secured in one operation, eliminating the need for step-by-step assembly during installation.
Solution Approach 2:
The collar incorporates self-aligning features such as notches that engage with the post and blocking members that automatically position the wings within the rail. These self-service mechanisms reduce the need for precise manual alignment and tool adjustments, enabling faster and more convenient installation.
3Reliability
If a conventional fixing device requiring tools is used, then secure attachment is achieved, but installation requires specialized tools and becomes less convenient
Solution Approach 1:
The patent replaces the conventional mechanical fastening system requiring screwdrivers and spanners with a snap-fit mechanism. The wings with hooks engage with the rail through a simple insertion and pivoting motion, and the notches provide automatic mechanical locking with the post. This substitution eliminates the need for threaded fasteners and corresponding tools.
Solution Approach 2:
The collar's blocking members and notches create a self-locking mechanism that secures the panel to the post without requiring tools for tightening or securing. The mechanical design inherently provides the fastening function through geometric interlocking, making the installation process tool-free and more convenient.
Data Source
Figure 1~2
Figure 3~5
Figure 6~9
AI summary
The present invention relates to a an attachment clip (1) for associating a panel (2), provided with at least one attachment rail (6) rigidly connected to the back (7) of said panel (2), to a post (3) with an overall square or rectangular cross-section, said attachment clip (1) being characterised in that it comprises an overall U-shaped body (17) including at least: two flanges; a web connecting one of the longitudinal edges of the two flanges and having a cut-out such that each of the flanges includes a portion extending respectively beyond the web in the direction of the respective longitudinal edges; a hook arranged at the free end of the portion capable of being inserted into the rail (6); and a notch for immobilising the attachment clip (1) on the rail (6).