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Elevator, elevator maintenance inspection system, and elevator abnormality diagnosis device

An elevator, abnormal technology, applied in the direction of transportation and packaging, elevators, etc., can solve problems such as the state of being unable to detect the state of the load

Active Publication Date: 2020-02-11
HITACHI BUILDING SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, due to the deterioration of the anti-vibration rubber, etc., there is a state where the overload state cannot be detected, and a failure of the last floor deceleration device installed near the last floor of the uppermost floor and the lowermost floor to decelerate the car, etc.

Method used

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  • Elevator, elevator maintenance inspection system, and elevator abnormality diagnosis device
  • Elevator, elevator maintenance inspection system, and elevator abnormality diagnosis device
  • Elevator, elevator maintenance inspection system, and elevator abnormality diagnosis device

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no. 1 approach

[0023] In the present embodiment, a torque command value which is a command value of torque required by the motor is calculated using a load detection sensor installed in an elevator, a motor current detector, and a rotary encoder. Then, the torque command value is compared with a predetermined torque limit value, and when the torque command value exceeds the torque limit value, it is determined that there is an abnormality. And the cause of the abnormality is estimated using the output of the load detection sensor at this time.

[0024] [elevator]

[0025] First, the structure of the elevator 100 of this embodiment is demonstrated. figure 1 It is a schematic diagram showing a structural example of the elevator 100 according to the first embodiment.

[0026] As shown in this figure, the elevator 100 of this embodiment includes: a car 101, a load detection sensor 102, a motor 103, a rotary encoder 104, a control panel 107, a sheave 108, a braking device 109, a counterweight 1...

no. 2 approach 》

[0114] Next, a second embodiment of the present invention will be described. In the first embodiment, the cause of the abnormality of the elevator 100 is estimated to be either an undetectable overload state or occurrence of braking resistance. In the present embodiment, the abnormality of the last floor deceleration detection switch 112 is further estimated as the cause of the abnormality.

[0115] The elevator 100 of this embodiment is basically the same as that of the first embodiment. Hereinafter, the present embodiment will be described mainly focusing on the configuration different from that of the first embodiment.

[0116] The structure of the elevator 100 according to the present embodiment is figure 1 as well as figure 2 Said first embodiment is basically the same. However, in the present embodiment, as described above, the abnormality of the estimated last floor deceleration detection switch 112 is further estimated as the cause of the abnormality. Therefore, ...

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Abstract

The invention relates to an elevator abnormality diagnosis technology. The present invention can accurately detect the occurrence of an abnormality in an elevator and estimate the cause of the abnormality without depending on the travel mode of the elevator. The elevator is provided with: a torque calculation unit (151) for calculating a torque command value, which is a torque to be applied to a motor (103) by using a load, a motor current, the position and speed of a car, and a torque limit value that is held in advance in a storage device; an abnormality presence / absence determination unit (161) for determining the presence / absence of an abnormality in the elevator (100) by using the torque command value and a torque threshold value held in advance; an abnormality cause estimation unit (162) that estimates an abnormality cause which is the cause of the abnormality by using the load and the load determination value when the abnormality presence / absence determination unit (161) determines that there is an abnormality; and an output unit (163) that outputs the abnormality cause estimated by the abnormality cause estimation unit (162).

Description

technical field [0001] The invention relates to abnormal diagnosis technology of elevators. Background technique [0002] There is a technique of detecting braking resistance in an abnormality generated by an elevator. For example, Patent Document 1 discloses the following technology: "At the start of operation, the load in the car is detected as a ratio to the rated car load, and the detected load in the car, the rated car load L, The balance point BP representing the ratio of the counterweight to the rated load of the car, the diameter of the sheave D, the constant K determined according to the pulling, and the rated torque Tm of the motor are associated to determine the braking resistance judgment value. The torque command value during running is compared with the braking resistance judgment value, and the braking resistance is detected as an abnormality of the braking device (excerpt of abstract)". [0003] Patent Literature [0004] Patent Document 1: Japanese Unexam...

Claims

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Application Information

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IPC IPC(8): B66B5/00B66B5/02B66B5/14
CPCB66B5/0025B66B5/0087B66B5/02B66B5/14
Inventor 吉元慎治坂田义喜川崎胜
Owner HITACHI BUILDING SYST CO LTD