Elevator

An elevator and elevator car technology, which is applied in the field of elevator speed monitoring, can solve the problems such as the deterioration of the coating performance of the lifting rope, the deterioration of the coating performance of the traction sheave, the insufficient grease of the steel wire rope, etc.

Pending Publication Date: 2020-12-15
KONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Reduced friction between the hoisting ropes and the traction sheave of the hoist can cause problems with elevator use
This reduction can be due to a number of reasons s

Method used

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Examples

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Embodiment Construction

[0029] The following description illustrates a solution for monitoring the movement of the elevator car near the end of the elevator shaft. In the event of failure of the elevator car to decelerate, an emergency stop can be performed to bring the elevator into a safe state. The solution can constitute an ETSL (Emergency Terminal Speed ​​Limiter) safety function as required by the Lift Safety Regulations (EN 81-20 2014 para 5.12.1.3; A17.1 2016 para 2.25.4.1).

[0030] Figure 1A An elevator is shown with an elevator car 4 and a counterweight arranged to move vertically in an elevator shaft 1 consisting of a surrounding wall 25 and a top end 3A and a bottom end 3B limited. The elevator comprises a hoist 6 comprising a traction sheave 8 . The hoisting ropes 9 of the elevator car 4 engage with and run through the traction sheave 8 . The hoisting rope 9 can be a round rope or a belt. Their load-bearing parts can be made of steel and / or synthetic fibers, such as glass fibers or c...

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Abstract

The present invention concerns an elevator comprising an elevator shaft (1) defined by surrounding walls and top (3A) and bottom (3B) end terminals; an elevator car (4) vertically movable in the elevator shaft (1); elevator hoisting ropes (9) coupled to the elevator car (4); elevator hoisting machine (6) comprising a traction sheave (8), which is engaged with the elevator hoisting ropes (9); traction monitoring means configured to determine traction of the hoisting machine (6); an electromechanical braking apparatus (12A, 12B); a measuring apparatus (14A, 14B, 14C) adapted to provide speed data and position data of the elevator car (4); and a safety processing unit (17) associated with the traction monitoring means and the measuring apparatus (14A, 14B, 14C), the safety processing unit comprising an ETLS threshold, which is configured to decrease towards the top (3A) and / or bottom (3B) end terminal in accordance with the position of the elevator car. The ETSL threshold is adjusted onthe basis of the traction of the hoisting machine (6). The safety processing unit (17) is configured to determine an elevator car slowdown failure if the speed data meets or exceeds the ETSL threshold.

Description

technical field [0001] The present invention relates to elevator speed monitoring. Background technique [0002] Elevators have electromechanical brakes that are applied to the traction sheave or rotating shaft of the hoist to stop the motion of the hoist and thus the elevator car driven by the hoist. Hoists usually have two electromechanical brakes. The brake must be dimensioned such that the elevator car with a load of 125% (overload of 25%) stops in the elevator shaft and remains at rest. In the event of abnormal operation, such as an overspeeding of the elevator car, the brakes can be used in emergency braking to stop the elevator car. [0003] An elevator may have hoisting ropes to drive and / or suspend the elevator car. Elevators are traditionally driven by wire ropes running over the traction sheave of the hoist. When the hoist brake is turned off to stop the movement of the elevator car, the wire rope will slip on the traction sheave to reduce the deceleration of ...

Claims

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Application Information

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IPC IPC(8): B66B5/00B66B5/24B66B5/16B66B1/32B66B1/30
CPCB66B5/0031B66B5/24B66B5/16B66B1/32B66B1/30B66B1/3407B66B1/3461B66B1/3492B66B5/06B66B5/28
Inventor M.维亚宁J-M.艾塔莫托T.考皮宁R.兰皮宁T.卡利奥V-M.维尔塔
Owner KONE CORP
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