Safety device for an elevator
By introducing a combination of upper and lower switch nodes with the main node in the elevator system, the car speed is monitored and the speed level is reduced in the event of a communication failure. This solves the problem of reduced availability in the elevator system caused by communication anomalies, and achieves stable operation and improved safety of the elevator.
CN117550446BActive Publication Date: 2026-06-12MITSUBISHI ELECTRIC BUILDING SOLUTIONS CORP
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Patent Information
- Application Number
- CN202211203677.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Priority Date
- 2022-08-04
- Filing Date
- 2022-09-29
- Publication Date
- 2026-06-12
- Estimated Expiration
- 2042-09-29
AI Technical Summary
Technical Problem
In elevator systems, when the safety bus communication malfunctions, effective car deceleration control cannot be performed, leading to reduced elevator availability.
Method used
By combining upper and lower switch nodes with the main node, the elevator monitors the car speed through a serial communication protocol. When a communication failure is detected, the speed level is reduced to avoid emergency stops and ensure the normal operation of the elevator.
Benefits of technology
This effectively avoids emergency elevator stops due to communication failures, improving elevator availability and safety.
✦ Generated by Eureka AI based on patent content.
Abstract
A safety device of an elevator capable of suppressing a decrease in availability of the elevator. A host node (63) monitors whether a traveling speed of a car (42) reaches an excessive speed level based on a signal from an upper reference position switch (45), a signal from a lower reference position switch (46), and information related to a traveling direction of the car (42). As the excessive speed level, a first speed level and a second speed level are set to the host node (63). The second speed level is a lower level than the first speed level. The host node (63) applies the second speed level to upward traveling of the car (42) in a case where an upper communication failure is detected, and applies the second speed level to downward traveling of the car (42) in a case where a lower communication failure is detected.
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