Treadmill Protective Cover with Sensor-Triggered Conveyor Stop
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Solution Overview
Problem
Treadmill conveyors with exposed ends pose a safety hazard, particularly for children, as they can trap objects or limbs, leading to injuries or fatalities due to the gap between roller shutter belt strips which increases the risk of accidental insertion.
Innovation Solution
A treadmill design featuring a protective cover with sensors that detect objects near the entrapping area, coupled with a controller to stop the conveyor when an object is sensed, ensuring the protective cover is closed before operation and automatically halting the conveyor to prevent accidents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the conveyor uses a roller shutter belt with strips placed side-by-side, then the conveyor can be manufactured with standard components, but the gap between strips increases the risk of objects or fingers being accidentally inserted
Solution Approach 1:
A protective cover is introduced as an intermediary component between the conveyor belt and the environment. This cover blocks access to the entrapping area created by the gap between roller shutter belt strips, preventing objects or fingers from being accidentally inserted while allowing the conveyor to operate with standard manufactured components
2Object-affected harmful factors
If the protective cover is added to block the entrapping area, then safety is improved, but the device complexity increases
Solution Approach 1:
The protective cover serves as a simple intermediary barrier that blocks the entrapping area without requiring complex mechanisms. It can be implemented as a basic cover component that attaches to the treadmill frame, providing safety while minimizing added complexity
Solution Approach 2:
Sensors are integrated to detect when the protective cover is in place or when objects approach the entrapping area. This feedback mechanism allows the system to automatically control conveyor operation - stopping the conveyor when the cover is removed or objects are detected - thereby enhancing safety with minimal additional complexity through automated control
3Reliability
If sensors and controllers are added to detect objects and control conveyor operation, then safety is enhanced, but the device complexity and cost increase
Solution Approach 1:
Sensors provide feedback about the protective cover position or object presence to the control system. This feedback loop enables automatic conveyor control - stopping when the cover is removed or objects are detected - enhancing safety through automated response rather than complex mechanical interlocks
Solution Approach 2:
The system uses sensors to automatically detect safety conditions and control the conveyor without requiring external intervention. The controller monitors sensor inputs and autonomously starts or stops the conveyor based on whether the protective cover is in place or objects are detected, simplifying the control architecture compared to manual safety mechanisms
Data Source
AI summary
A protective cover and system for detecting objects within or near an entrapment area on a treadmill or devices that incorporate a conveyor belt. A controller enables the treadmill to operate normally when no objects are detected within or near an entrapment area and is designed to stop the conveyor when an object is detected within or near the entrapment area.