Elevator Belt Cord Monitoring With Bridge Contact Stability
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Solution Overview
Problem
Existing elevator belt monitoring devices face difficulties in maintaining consistent contact with the cords due to shifting and separation of penetrating screws, leading to unreliable monitoring of cord condition over time.
Innovation Solution
The use of belt-piercing devices that penetrate through the elevator belt and its cords, with a plurality of contacts connected to these devices, including bridge contacts and signal contacts, to deliver an electrical signal and analyze any abnormalities in the cord condition, ensuring stable and reliable monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If penetrating screws are used to contact the cords, then electrical signal transmission is achieved, but contact stability deteriorates due to cord and screw shifting over time
Solution Approach 1:
The monitoring system employs a dynamic adjustment mechanism that allows the penetrating screws to automatically reposition themselves along the cords as they shift during belt operation. This dynamic adaptation ensures continuous electrical contact despite the changing relative positions of cords and screws, resolving the contradiction between achieving initial contact and maintaining long-term contact stability.
Solution Approach 2:
The system utilizes adjustable screw penetration depth and angle parameters that can be modified to optimize contact with the cords. By changing these parameters, the system adapts to cord position variations and maintains reliable electrical connection, addressing the instability caused by shifting components.
2Ease of manufacture
If visual inspection is used to check belt condition, then simplicity is maintained, but detection capability deteriorates as cord deterioration cannot be visually detected
Solution Approach 1:
The patent replaces visual inspection with an electrical monitoring system that uses conducting elements in direct contact with the cords. This substitution transforms the detection method from optical (visual) to electrical, enabling the system to detect cord deterioration through changes in electrical properties such as resistance or conductivity, thereby overcoming the limitation of visual inspection while maintaining system simplicity.
Solution Approach 2:
The system introduces conducting elements as intermediaries between the monitoring device and the cords. These intermediaries make electrical contact with the cords and transmit signals about cord condition to the monitoring device, enabling indirect detection of cord deterioration without requiring direct visual access to the cord interior.
3Measurement precision
If multiple contacts are added to improve monitoring reliability, then detection accuracy improves, but device complexity increases
Solution Approach 1:
The penetrating screws serve multiple functions simultaneously: they provide mechanical anchoring to the belt, establish electrical contact with the cords, and act as signal transmission conduits. This multi-functionality reduces the need for separate components, thereby improving detection accuracy without proportionally increasing device complexity.
Solution Approach 2:
The system merges the functions of mechanical fastening and electrical contact into a single integrated component (the penetrating screw). By combining these functions, the design achieves reliable cord condition monitoring while minimizing the number of separate parts and assembly steps, thus balancing measurement precision with device simplicity.
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 solution provides a stable and reliable method for monitoring the condition of elevator belt cords by maintaining consistent contact, allowing for early detection of deterioration and improving the accuracy of cord integrity analysis.
Implementation Method 1
An electrical signal is delivered to the cords via the connecting devices and changes in the signal are analyzed to provide an indication of deterioration of the cords
Data Source
AI summary
An elevator belt monitoring apparatus includes a housing for receiving an elevator belt and a plurality of screws or pins which are operable to pierce the belt and the spaced parallel cords arranged within the belt. One screw or pin engages each cord. A plurality of bridge contacts are connected with adjacent pairs of screws or pins and signal contacts are connected with the screws or pins adjacent to the outer edges of the belts. The signal contacts are connected with a monitoring device which sends and receives signals to the contacts to provide an indication of the condition or deterioration of the belt.