Protective device for underneath-type machine-room-less maintenance

A protection device and machine room-less technology, applied in the field of elevators, can solve problems such as safety hazards of machine room-less elevators, and achieve the effect of preventing safety hazards and ensuring maintenance safety.

Inactive Publication Date: 2013-05-08
CANNY ELEVATOR
View PDF7 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the maintenance of machine-room-less elevators has certain safety hazards compared with traditional machine-room elevators. For this, new inspection regulations and some experts in the elevator industry put forward a series of requirements to reduce maintenance risks.

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
  • Protective device for underneath-type machine-room-less maintenance
  • Protective device for underneath-type machine-room-less maintenance
  • Protective device for underneath-type machine-room-less maintenance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] Considering the potential safety hazards that may exist in the maintenance of the bottom-mounted machine room in the pit, and in view of the new inspection regulations and the requirements of experts, a maintenance protection device is set up, and the maintenance safety is ensured through joint control of mechanical and electrical circuits.

[0016] Such as figure 1 As shown, the set of devices has three switches in the well, one is a normally closed limit switch of HD1370, which is triggered by a striker. This switch is installed at the place where the lowest part of the car is 2m away from the ground in the work site. When it is detected that the elevator is in pit maintenance state, the car stops when the elevator runs down to the switch position, and cannot continue to go down, but can only go up.

[0017] There are two HD1371 normally open switches on the elevator protection device, one is used to detect whether the protection device has been installed in place; th...

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 invention discloses a protect device for underneath-type machine-room-less maintenance. The protective device comprises three switches, one is an HD 1370 normal closed limit switch arranged at a position 2m away from floor of a work site on the lowest portion of a cage, the other two are HD1371 normal open switches, one of the HD1371 normal open switches is used for detecting whether the protective device is installed in place or not, and the other of the HD1371 normal open switches is used for detecting whether the protective device is restored in place or not. An electrical safety device used for checking up working position of a stopping device is arranged in the protective device, and therefore, when the mechanical stopping device is at a wrong parking position before being at a working position, all operation of the cage can be prevented, and switch mulfunction or potential safety hazards due to damage of the switches are avoided.

Description

technical field [0001] The technology of the present invention relates to an elevator without a machine room installed below. When the elevator is inspected and repaired in the bottom pit, a mechanical protection device and an electrical safety switch are used to form a circuit to ensure the safety of maintenance personnel. The patent belongs to the technical field of elevators. Background technique [0002] With the development of the elevator business, machine room-less elevators are being widely used due to their structural advantages. However, the maintenance of machine room-less elevators has certain safety hazards compared with traditional machine room elevators. For this, new inspection regulations and some experts in the elevator industry put forward a series of requirements to reduce maintenance risks. In this regard, this patent utilizes mechanical protection devices and electrical circuit control to reduce maintenance risks. Contents of the invention [0003] I...

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 Applications(China)
IPC IPC(8): B66B5/00
Inventor 李跃平朱森峰
Owner CANNY ELEVATOR
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