JPS586886A - Elevator device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an elevator device that can lower a car that has stopped unexpectedly due to a power outage or the like.

First, a conventional elevator system will be explained with reference to FIG.

In the figure, 1) is a hoisting machine equipped with an electromagnetic brake (1a), (2) is a sheave consisting of its driving sheave, and (3) is a main rope wrapped around the sheave (2). So, (4) is the car suspended from one end of this, and (5) is the weight of the car (4) suspended from the other end of the main rope (3). A counterweight set to .

(6) is provided in the hoistway bit (7) and the cage (4);
These are shock absorbers placed opposite the counterweights (5), respectively.

In other words, when the second hoisting machine (1) is energized, the electromagnetic brake
(1a) is released, and due to the friction between the sheave (2) and the main rope (3), the heel (4) and the counterweight are driven in opposite directions. If the car (4) comes to an emergency stop, the electromagnetic brake (1!L) is manually released as appropriate, the car (4) is lowered and stopped at the landing on the ground floor, and the passengers inside the car (4) are rescued. However, if the number of passengers in the car (4) is small, the heel (4) can be used as a counterweight (5).
It may not move in balance with the weight, or it may move upward. For this reason, there was a problem that required expensive equipment such as a load detection device (4), an auxiliary motor for rescue operation, and an emergency power supply for this purpose in order to lower the vehicle (4) in case of an unexpected stop.

The present invention aims to eliminate the above-mentioned drawbacks and provides an elevator system that has a simple configuration and can be easily rescued in the event of an emergency stop.

Below, Part 2. An embodiment of the present invention will be explained with reference to FIG.

In the figure, the same symbols as in Figure 1 indicate corresponding parts, (1) is the hoist installed on the bit (7), (1b) is the winding drum of this, and (2) is the pivot on the upper part of the hoisting path. a sheave consisting of a pulled pulley,
(5) is a counterweight that is lighter than the weight of the basket (4), and (8) is a counterweight that is connected at one end to the winding drum (1).
(b) is the main rope wrapped around the main rope, (9) is the electromagnetic brake (1
a) is the normally open contact of the control device that operates 0 [is the normally closed switch that is installed in the operation box (not shown) and operates when the lid of this box is opened to release the electromagnetic brake (1a) for rescue operations. contact.

A is the rescue power relay, (11a) is its normally open contact, (1tb) is the normally closed contact, aa is the rescue button installed in the operation box, and support is the rescue power source consisting of a battery.

(+-)0 is a power supply.

In other words, the counterweight (5) is set to be lighter than the weight of the heel (4), and tension is applied to the main rope (31 (8)) regardless of the internal load of the heel (4). The upper machine is energized, and the main rope (8) is wound around the winding drum (1b), and is unwound from the winding drum (1b) to operate the rope (4), etc.Also, the lid of the operation box is always closed. is closed, the contact point 1 is closed, and the rescue power supply relay a is energized by the circuit of -ttl-ait-0, the contact point (11a) is closed, and the contact point (11b) is opened.

And go up one volume +-) − (9) − (lla) (Ia)
The electromagnetic brake (1a) is energized and released by the circuit of f''), and when the first winding is deenergized, the contact (9) is opened and the electromagnetic brake (1a) is deenergized and operated.

Then, if the car (4) suddenly stops, operate;
1. When the lid of the box is opened by the staff, contact aQ is opened and the rescue power relay (ID is deenergized, contact (11a)
is opened and the contact (11b) is closed. In this state, when button α is pressed by the staff member, a: 1-03
- (11b) - (1a) The electromagnetic brake (1a) is energized and released by a different circuit. As a result, the heel (4) descends due to the weight of the heel (4), and when it reaches the ground floor, when the button α is released, the electromagnetic brake (1a) is activated.
is deenergized and operates, so the car (4) stops.

This allows the passengers inside the heel (4) to be rescued. Also, in the event of an emergency stop due to power outage of power supply (G) 0, the rescue power supply relay aυ is deenergized, so that the heel (4) can be lowered by operating the button 62. With this simple configuration without the need for expensive equipment, the heel (4) can be lowered to rescue passengers in the event of an emergency stop, regardless of whether there is an abnormality in the power supply ←) (c).
Particularly optimal effects can be obtained in small-capacity elevators. In this embodiment, the button (13) is provided outside the elevator and operated by an attendant, but the same effect can be obtained by using a button provided inside the car (4) and operated by a passenger. is obvious.

Also, even if the elevator is a traction type elevator rather than a two-bore type elevator, the right hand slant must be set at the second level.

It is clear that the same effect can be obtained by setting the same as the embodiment shown in FIG.

As explained above, the present invention includes a counterweight suspended from the other end of the main rope on which the car is suspended.

The car is constructed to be lighter than the car's own weight plus one passenger, and if the brake of the hoisting machine is artificially released in the event of an emergency stop, the car will lower when there is at least one passenger in the car. It was made to work. As a result, it is possible to realize an elevator system that can rescue passengers in the car from the ground floor in the event of an emergency stop with a simple system configuration, and that can achieve this function at a low cost.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view conceptually showing a conventional elevator system, Fig. 2 is a view corresponding to Fig. 1 showing an embodiment of the elevator system according to the present invention, and Fig. 3 is the main electric circuit of Fig. 2. It is a diagram. (1)...Hoisting machine, (la)...Electromagnetic brake,
(2)... Sheave. (3) Main rope, (4) Cart, (5) Counterweight. In addition, the same parts or corresponding parts in FIG. 1 are indicated by the same reference numerals. Agent Shin Kuzuno - Figure 1 @ Figure 2 Figure 3

Claims (1)

[Claims] A car that is driven by being suspended from one end of a sheave via a main rope that is wound around a sheave by a hoisting machine. The rope is suspended from the other end of the main rope and driven by the hoisting machine in a direction opposite to that of the rope, and is lighter than the weight of either of the ropes plus one passenger. At least one car is placed in the car when the hoist brake is released.
An elevator device comprising a counterweight that lowers the heel when there are passengers.