Octagonal Road Stud Base with Groove for Retention and Installation
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Solution Overview
Problem
Existing road studs, particularly depressible types, face issues with insert distortion and reduced visibility due to dirt accumulation, and the time-consuming process of frogging for installation, which affects their longevity and effectiveness.
Innovation Solution
A base unit with an octagonal recess and projections to securely hold a depressible insert, and a groove for keying during installation, reducing distortion and eliminating the need for frogging, thereby enhancing wiper action and installation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rectangular recess is used to hold the insert, then the insert can be retained in position, but the insert suffers distortion when compressed by passing traffic
Solution Approach 1:
The recess is designed with chamfered corners instead of sharp rectangular corners, creating an asymmetric shape that better accommodates the insert during compression. This asymmetric geometry allows the insert to deform more uniformly when compressed by passing traffic, reducing distortion while maintaining retention through the chamfered corner structure.
2Reliability
If frogging is used to bond the road stud to the road surface, then the road stud is securely installed, but the installation process becomes time-consuming
Solution Approach 1:
The invention extracts and eliminates the frogging step from the installation process. The base unit is designed with an integrated bonding structure that allows direct installation into the prepared hole without requiring the separate frogging operation, thereby maintaining installation security while significantly reducing installation time.
Solution Approach 2:
The base unit is pre-formed with bonding surfaces and structural features that enable direct installation. The bonding interface is prepared in advance during manufacturing, allowing the road stud to be installed directly into the hole without requiring on-site frogging, thus performing the bonding preparation action beforehand to save installation time.
Data Source
Figure 1
Figure 2~3
Figure 4A~4B
AI summary
In one embodiment, a base unit for a road stud has a recess for receiving a depressible insert and a plurality of projections extending into the recess for retaining the depressible insert therein. The recess has a shape in plan view comprising six or more sides. A depressible insert for use in combination with such a base unit has holes for receiving the projections from the base unit to retain the insert in the recess and has a shape in plan view comprising six or more sides. In another embodiment, a metal base unit for a road stud is adapted to accommodate a reflective insert. The outer wall of said base unit comprises a groove extending horizontally around the periphery of the base unit. The groove is arranged to lie below surface level when the base unit is installed into a road.