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Elevator maintenance safety device

A safety device, elevator technology, used in elevators in buildings, transportation and packaging, elevators, etc.

Active Publication Date: 2019-12-27
HITACHI BUILDING SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the push-button switch operates reliably, but there is a problem that the push-button switch also operates when the door of the lowest floor is opened such as closing the elevator.

Method used

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  • Elevator maintenance safety device
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  • Elevator maintenance safety device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] figure 1 It is a side view showing the overall structure of the elevator. in figure 1 Among them, 1 is the elevator path, 2 is the elevator boarding point, and 3 is the pit shaft of the elevator path. The boarding point 2 is provided on each floor where the elevator stops. In the example shown in the figure, 2a is the lowest boarding point, for example, the first floor, and 2b is the second floor. The pit 3 is the part from the stop position of the lowest level to the bottom of the lifting path.

[0022] 4 is the elevator car and 5 is the counterweight. The car 4 and the counterweight 5 are raised and lowered in the lifting path 1 in opposite directions.

[0023] 6 is the traction machine, 7 is the control panel, and 8 is the speed governor. In an elevator without a machine room, the hoisting machine 6, the control panel 7, and the speed governor 8 are installed in the hoisting path 1. In an elevator with a machine room, the hoisting machine 6, the control panel 7, and t...

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PUM

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Abstract

The present invention provides an elevator maintenance safety device capable of safely operating a push switch when a maintainer performs maintenance work in a pit. The elevator maintenance safety device is characterized by being provided with a landing door which is opened and closed along a door track and a landing threshold, a switch that operates when the landing door is in the fully open position, a closing-direction movement prevention mechanism for preventing the landing door from moving in the closing direction when the landing door is in the fully open position, and an opening / closingpermission mechanism that permits the landing door to move to the fully open position by an operation of starting a pit maintenance operation and permits the landing door to move in the closing direction by an operation of ending the pit maintenance operation, wherein the power supply of an elevator is controlled by the switch.

Description

Technical field [0001] The invention relates to an elevator maintenance safety device. Background technique [0002] In the elevator, since there are maintenance facilities in the hoistway of the hoistway, maintenance workers perform maintenance work in the hoistway of the hoistway. In the case of maintenance work in the pit, open the locking device of the landing door, use a limiter or the like to prevent the automatic locking of the landing door from being locked, and operate the position switch that cuts off the power to perform the work. [0003] Among them, in order to avoid interference with the elevator car, etc., the position switch is installed near the entrance and exit of the elevator path under the door sill, but in order to operate the position switch, it is necessary to protrude the body in the elevator path and slip into the pit. The danger. [0004] Patent Document 1 discloses a device that automatically activates a push switch when a maintenance worker opens the lo...

Claims

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Application Information

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IPC IPC(8): B66B13/18B66B5/00B66B5/02B66B5/28B66B13/30
CPCB66B13/18B66B5/0031B66B5/02B66B5/28B66B13/301
Inventor 新堀贵明大林孝矢内贤一中村贤铃木健太
Owner HITACHI BUILDING SYST CO LTD