Safe retention device for household elevator

Abstract

The invention discloses a safe retention device for a household elevator. The safe retention device comprises a fixed plate, a baffle plate, a micro switch and a limit switch, wherein the fixed plate is fixedly arranged on a wall surface where an elevator guide rail is positioned; the baffle plate is arranged adjacent to the fixed plate; a fixed shaft is arranged at the joint between the baffle plate and the fixed plate; the baffle plate can be turned around the fixed shaft to be vertical to the fixed plate; the micro switch is connected in series with a safety circuit of the elevator and is in a normally-opened state; when the baffle plate is turned up, a micro switch button of the micro switch is ejected out, and the safety circuit of the elevator is switched off; the limit switch is connected in series with the safety circuit of the elevator and is in a normally-closed state; and when the elevator is operated, the limit switch is triggered to be switched off. The safe retention device has a compact structure and is convenient to mount; and the safety of mounting personnel and maintenance personnel is effectively ensured in a triple secure mode, namely a mechanical secure mode and electrical double secure modes.

Description

technical field [0001] The invention relates to a safety blocking device, in particular to a safety blocking device for a domestic elevator. Background technique [0002] At present, in order to maximize the use of space, household elevators generally adopt a backpack structure, which is very compact, and often uses a shallow pit and a low top floor space, which may bring certain problems to the installation and maintenance of the elevator. Security risks. There are two specific performances: [0003] 1. During installation or maintenance, if someone is in the elevator pit, if the elevator accidentally falls, if there is no blocking device, the shallow pit will cause a crushing accident; [0004] 2. When the brake of the traction machine fails, the elevator car moves upward due to gravity. If there is someone on the top of the car at this time, the small top floor space will also cause a crushing accident. Contents of the invention [0005] The purpose of the present in...

AI Technical Summary

Problems solved by technology

[0003] 1. During installation or maintenance, if someone is in the elevator pit, if the elevator accidentally falls, if there is no blocking device, the shallow pit will cause a crushing accident;

[0004] 2. When the brake of the traction machine fails, due to the gravity factor, the elevator car moves upward. If there is someone on the top of the car at this time, the small top floor space will also cause a crushing accident

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