Covered Roller Assembly With Folded Covering Wear Detection
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Solution Overview
Problem
Existing methods for securing coverings on rotating rollers are costly, complex, and not conducive to mass production, often requiring additional components and sensors for wear detection, leading to increased manufacturing costs and reduced productivity.
Innovation Solution
A covered roller design where a cylindrical covering with stretchability is used, protruding from the rotating body and folded back to integrate with a press-fit insertion member, eliminating the need for separate caps and sensors, and allowing for easy detection of wear through electrical conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods using separate caps, ties, or thermal shrinking are used to secure coverings, then the covering can be held securely, but the manufacturing process becomes complex and costly
Solution Approach 1:
The insertion member integrates multiple functions: it serves as both the structural support element and the covering retention mechanism. The covering is inserted together with the insertion member in a single operation, eliminating the need for separate caps, ties, or thermal shrinking processes that were required in conventional methods.
Solution Approach 2:
The insertion member is designed to perform multiple functions simultaneously: providing structural support to the rotating body, securing the covering through friction and geometric constraints, and enabling easy replacement of the covering. This multi-functional design replaces multiple separate components used in conventional approaches.
2Reliability
If conventional securing methods are used, then covering retention is achieved, but additional components and steps are required increasing manufacturing cost
Solution Approach 1:
The insertion member and covering are designed as an integrated assembly where the covering is inserted together with the insertion member in a single operation. This combines multiple manufacturing steps into one, reducing labor costs and manufacturing complexity while maintaining secure covering retention.
Solution Approach 2:
The covering is designed as a replaceable component that can be easily removed and replaced when worn. The simple insertion and removal mechanism allows for cost-effective replacement without requiring specialized tools or complex disassembly procedures, reducing long-term operational costs.
3Measurement precision
If conventional wear detection methods using sensors are used, then roller lifespan can be detected, but manufacturing cost increases
Solution Approach 1:
The covering incorporates visual wear indicators through color changes or contrasting patterns that become visible as the covering wears. This allows operators to easily detect wear and determine when replacement is needed without requiring electronic sensors or complex detection systems, maintaining low manufacturing costs while providing effective wear monitoring.
4Productivity
If mass production is prioritized, then productivity increases, but conventional securing methods are not conducive to mass production
Solution Approach 1:
The insertion member and covering form an integrated assembly that can be pre-assembled and then quickly installed on the rotating body. This reduces the number of discrete assembly steps required during mass production, increasing productivity while maintaining secure covering retention through the simplified mechanism.
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
This design simplifies the fabrication of covered rollers, reduces manufacturing costs, and enables precise alignment of the rotating body with the shaft, while allowing for easy replacement of worn coverings and detection of lifespan through electrical signals.
Implementation Method 1
heat-shrinking in a radial direction of the covering due to application of heat
Implementation Method 2
contraction of the covering which is stretchable in at least the radial direction
Data Source
AI summary
To achieve reduction in cost and improvement in productivity, to provide a covered roller at which the covering is adequately secured, and to provide a lifespan detection means therefor, a rotating body covered with a covering has a region at which an insertion member is inserted inside the rotating body such that the covering intervenes therebetween, a length of the covering is made to be greater than a width in a width (axial) direction of the rotating body that is covered with the covering, the covering being made to protrude beyond the rotating body, heat-shrinking in the radial direction of the covering due to application of heat, or contraction of the covering where the rotating body is covered with a covering that has stretchability in at least the radial direction and that has been made to be longer than the width of the rotating body that is covered with the covering so as to protrude beyond the rotating body, causing an inside circumferential length of an end portion of the covering in the region which has been made to protrude from the rotating body to be less than or equal to an inside circumferential length of an inside diameter of the rotating body, the protruding portion of the covering being folded back inside the rotating body, the insertion member being inserted inside the rotating body under at least press-fit conditions such that the covering intervenes therebetween, the covering being held to the rotating body surface, the roller which is employed being such that at least the rotating body, the covering, and the insertion member are made integral.