Article Transport Device Guide Roller Wear Detection
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Solution Overview
Problem
The wear of guide rollers in article transport devices leads to a tilt of the traveling vehicle, resulting in decreased straight traveling performance, as existing technologies lack effective methods to sense and address roller wear.
Innovation Solution
An article transport device equipped with a traveling vehicle featuring a first and second wheel, guide roller pairs, and sensors to detect horizontal distances, allowing for the detection of worn guide rollers and maintaining vehicle alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If guide rollers are used for traveling along the guide rail, then the article transport device can travel smoothly along the rail, but the guide rollers wear over time causing tilt and decreasing straight traveling performance
Solution Approach 1:
The patent installs sensors before the guide rollers wear significantly to detect early signs of wear. By monitoring the horizontal distance between the frame and guide rail in advance, the system can identify wear trends before they cause substantial tilt or performance degradation, enabling preventive maintenance actions.
Solution Approach 2:
The patent implements a feedback mechanism where sensors continuously measure the horizontal distance between the frame and guide rail, and this information is fed back to the control unit. The control unit analyzes changes in this distance to detect guide roller wear and can respond by adjusting positioning or alerting operators, creating a closed-loop system that maintains traveling performance.
2Measurement precision
If multiple sensors are installed to detect guide roller wear accurately, then wear detection precision improves, but device complexity increases
Solution Approach 1:
The patent divides the detection function into multiple sensors positioned at different locations (first sensor closer to the first wheel, second sensor closer to the second wheel). Each sensor independently measures the horizontal distance at its specific position, allowing the system to detect wear patterns and determine which guide rollers are worn by comparing readings from different segments of the structure.
Solution Approach 2:
The patent uses the horizontal distance measurement as an intermediary parameter to indirectly detect guide roller wear. Instead of directly measuring roller dimensions or wear depth, the sensors measure the resulting positional change of the frame relative to the guide rail, which serves as a mediator that translates physical wear into measurable distance changes.
Data Source
AI summary
It is sensed that a first guide roller of a first guide roller pair has been worn and/or that a second guide roller of a second guide roller pair has been worn. In an article transport device, a first sensor and a second sensor are attached to a frame, a distance between the first sensor and a first guide roller pair is shorter than a distance between the first sensor and a first wheel, and a distance between the second sensor and a second guide roller pair is shorter than a distance between the second sensor and a second wheel.