Tape Removal Hub Design for Pavement Marking
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Solution Overview
Problem
The existing methods for removing temporary marking tapes from paved surfaces are slow, labor-intensive, and hazardous, with no commercially viable machines available to efficiently handle the process, especially considering tape breakage and surface irregularities.
Innovation Solution
A spool spindle shaft and tape removal hub design that accommodates dynamic pulling forces and heavy tape weights, allowing for efficient and safe removal of multiple tape lines, including those with breaks, using a motorized apparatus with disposable cores and retainer discs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual removal methods are used, then labor flexibility is maintained, but removal speed is slow and labor intensity is high
Solution Approach 1:
The removed tape automatically winds onto the spool hub during the pulling operation, eliminating the need for separate collection mechanisms. The hub's rotational design allows tape to be captured and accumulated passively as it is removed from the pavement surface.
2Ease of operation
If heavy tape rolls are handled manually, then equipment cost is low, but worker safety is compromised and physical exhaustion increases
Solution Approach 1:
The tape removal system divides the heavy tape roll into manageable segments by winding it onto a rotating hub. This allows the tape to be processed in controlled portions rather than handling the entire heavy roll at once, reducing operator physical strain while maintaining removal efficiency.
3Reliability
If continuous tape lengths are assumed, then machine design is simplified, but reliability decreases when tape breakage occurs
Solution Approach 1:
The spool hub design dynamically adapts to varying tape conditions. When tape breaks occur, the hub's rotational mechanism and tension management system automatically adjust to continue winding and collecting the fragmented tape segments, maintaining reliable operation despite discontinuities in the tape supply.
4Productivity
If multiple tape lines are removed simultaneously, then productivity increases, but control and safety become more difficult
Solution Approach 1:
The spool hub mechanism serves multiple functions: it winds removed tape, accumulates multiple tape lines simultaneously, and provides tension control all through a single rotating component. This multi-functional design enables handling of multiple tape lines without proportionally increasing operational complexity.
Data Source
AI summary
A one-piece integrally molded tape removal hub for a temporary tape removing apparatus which includes a length of cylindrical tube and a sleeve having a noncircular through bore extending into a portion of the cylindrical tube at an end thereof. A plurality of webs extend from the outer surface of the sleeve to the inner wall of the cylindrical tube. The portion of the cylindrical tube extending from the sleeve to the opposite end of the cylindrical tube is hollow.