Brake operation management in elevators
US-10252879-B2 · Apr 9, 2019 · US
Elevator apparatus
US2020156902A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2020156902-A1 |
| Application number | US-201716611228-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jun 22, 2017 |
| Priority date | Jun 22, 2017 |
| Publication date | May 21, 2020 |
| Grant date | — |
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Abstract
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An elevator apparatus which includes a car; a hoisting rope having an expansion and contraction amount which varies depending on a height of the car; and a counterweight which on an opposite side of the car via the hoisting rope. The hoisting rope is wound around a hoisting machine, and the car is elevated when the hoisting rope is wound by the hoisting machine. In a control device of the elevator apparatus, a speed-command corrector corrects a base speed command, which is generated by a re-leveling operation controller, based on a current height of the car.
First claim
Opening claim text (preview).
1 . An elevator apparatus, comprising: a hoisting rope having an expansion and contraction amount which varies depending on a height of a car, the elevator apparatus performing a re-leveling operation, wherein a correction is performed so that an acceleration at a time of the re-leveling operation is reduced as a current height of the car with reference to a top floor where the car can elevate is lower. 2 . The elevator apparatus according to claim 1 , wherein the correction is performed while a maximum speed at the time of the re-leveling operation is unchanged. 3 . (canceled) 4 . An elevator apparatus, comprising: a hoisting rope having an expansion and contraction amount which varies depending on a height of a car; circuitry configured to perform a re-leveling operation; and circuitry configured to perform a correction so that an acceleration at a time of the re-leveling operation is reduced as a current height of the car with reference to a top floor where the car can elevate is lower. 5 . The elevator apparatus according to claim 4 , wherein: the circuitry configured to perform the correction performs the correction while a maximum speed at the time of the re-leveling operation is unchanged.
Assignees
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Classifications
- B66B1/40Primary
and for correct levelling at landings · CPC title
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- What does patent US2020156902A1 cover?
- An elevator apparatus which includes a car; a hoisting rope having an expansion and contraction amount which varies depending on a height of the car; and a counterweight which on an opposite side of the car via the hoisting rope. The hoisting rope is wound around a hoisting machine, and the car is elevated when the hoisting rope is wound by the hoisting machine. In a control device of the eleva…
- Who is the assignee on this patent?
- Mitsubishi Electric Corp
- What technology area does this patent fall under?
- Primary CPC classification B66B1/40. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu May 21 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).