Elevator and elevator sheave

A technology for elevators, sheaves, ropes or cables for elevators, transmission elements or pulleys used in buildings, textile cables, etc.

Active Publication Date: 2010-11-03
HITACHI LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the above-mentioned prior art, if the surface roughness of the sheave groove is simply set to about several μm, if resin coating For slings and synthetic fiber slings, a large amount of foreign matter adheres to the surface, causing the unevenness of the surface to be covered, resulting in a significant drop in the coefficient of friction
For example, if a large amount of oil adheres to the surface, it will cause the concave and convex parts of the surface to be covered with oil, resulting in a decrease in the coefficient of friction
In addition, in the case where the surface roughness of the sheave groove is set to about several tens of μm, although it is beneficial to prevent the friction coefficient from falling due to the adhesion of foreign matter, as the surface roughness increases, the contact with the metal phase Compared to, the wear of slings made of flexible resin increases

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Elevator and elevator sheave
  • Elevator and elevator sheave
  • Elevator and elevator sheave

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] figure 1 It is a schematic diagram which shows the elevator which is one Example. exist figure 1 Among them, 1 represents the elevator car used to carry passengers, the elevator car 1 is connected with the sling 2, and the sling 2 is wound on the sheave 4 installed on the winch 3 . Furthermore, the sling 2 is connected to a counterweight 6 via a diverting pulley 5 . Guide rails 7 are arranged in the hoistway, and guide shoes 8 installed on the elevator car 1 clamp the guide rails 7 therebetween.

[0045] When the sheave 4 rotates under the drive of the winch 3, relying on the friction between the sling 2 and the sheave 4, the rotational force of the sheave 4 is transmitted to the sling 2 to move the sling 2, so that the elevator car The cabin 1 moves up and down in the hoistway along the guide rail 7 . figure 1 The dotted line part of represents the position of the elevator car and the counterweight when the elevator car 1 ascends a floor.

[0046] figure 2 (a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention relates to an elevator where friction coefficient between a rope and a sheave is kept stable. The elevator includes a car (1), a rope (2) connected to the car (1), and a sheave (4), having the rope (2) therearound and rotating to travel the car (1). The rope (2) is a resin-covered wire rope formed by twisting steel wires and by coating the twisted wires with resin. The sheave (4) is provided with at least one groove having a surface of which arithmetic mean deviation of the profile Ra ranges from 4[mu]m to 10[mu]m in longitudinal and width directions of the groove. Further, a ratio of Zva to Zpa falls within a range from 1.5 to 2.0, where Zva indicates an average of depths of lower parts on the surface of the groove, and Zpa indicates an average of heights of higher parts thereon.

Description

technical field [0001] The present invention relates to an elevator in which a sling is connected to an elevator car and wound on a sheave, and the elevator car is driven by rotating the sheave, and a sheave for the elevator, and the present invention is particularly suitable for use by stabilizing the sling and the rope. The coefficient of friction between the wheels is used to reduce the wear of elevators and elevator sheaves. Background technique [0002] In a cable elevator using a wire sling, the sling is wound on a sheave mounted on the winch, centered on the sheave, one side of the sling is used to suspend the elevator car, and the other side is used for suspension. The counterweight used to maintain balance with the elevator car. Then, the sheave is rotated by the hoist, and the elevator car suspended by the rope is moved by the frictional force between the rope and the sheave. Therefore, in order to enable the elevator to run in a reasonable state, it is necessary...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): B66B9/00F16G9/00B66B11/08F16H55/38
CPCB66B15/04
Inventor 前田太一有贺正记早野富夫
Owner HITACHI LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap