JPH1149447A - Elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily check existence of abnormality in a balancing weight by fitting magnets to the right and left, upper and lower ends of a balancing weight, providing magnetic detectors on the respective required positions on the upper, middle, and lower parts of right and left guide rails corresponding to them, and detecting the fitting condition of the balancing weight to the guide rails. SOLUTION: During operation of this elevator, the car is elevatably moved while balancing with a balancing weight 5 through main cables by an elevator control device 1. Magnets 9 are fitted to the upper and lower, right and left ends of such balancing weight 5, and magnetic detecting devices 10 corresponding to them are provided on the right and left sides of the lower, middle, and upper parts of the guide rails 8 together with communication lines 11. When earthquake is generated and operation is stopped, before the restarting, operation at low speed is executed in the ascending direction. At this time, by reacting the detecting devices 10 against the magnets 9, running on the guide rails 8 is confirmed, and when at the worst the balancing weight 5 is derailed from the guide rails 8, and the derailed state is detected by the detecting devices 10, the operation is immediately stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to control of an elevator when an earthquake occurs.

[0002]

2. Description of the Related Art In a conventional elevator, when a counterweight derails from a guide rail in the event of an earthquake or the like, a professional engineer has confirmed this derailment accident.

[0003]

As described above, in the past, the visual confirmation of the accident was conventionally performed manually, so that the confirmation work was troublesome, and a lot of time was spent for the recovery work in the event of an earthquake. There was an effect on elevator users.

In order to solve this problem, it is required to have a function of automatically detecting the fitting state of the counterweight and its guide rail, and to prevent the collision between the basket and the counterweight when the counterweight is derailed. Have been.

[0005]

[Means for Solving the Problems] Instead of performing an inspection work on the car to check for a rail derailment accident, instead of an automatic check device, an elevator control device is provided with a check device for a counterweight to check for abnormalities in the counterweight. Presence,
A device to detect the position of the weight and the position of the car will be provided.

[0006] The position of the car stopped by the seismic control is detected, the positional relationship between the counterweight and the car is known in the control device, the operation direction of the car is determined so that the two are not mutually displaced, and whether the counterweight is abnormal or not Check operation of rails).

[0007] In the method of detecting rail removal, permanent magnets are attached to the counterweight, and magnetic detectors are provided at a plurality of locations on the guide rail side. When the permanent magnet on the counterweight passes the magnetic detector on the guide rail side, when the counterweight is running normally on the guide rail, the detector and the magnet come close to each other, and the detector reacts and balances. The fitting of the weight is determined to be normal. Conversely, when the counterweight is not traveling on the guide rail, that is, in a derailment state, the detector does not react because the detector and the magnet pass without approaching, and it is determined that the derailment is performed at that time. . If it is judged that the track is derailed, stop the car and the counterweight immediately.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the embodiments shown in FIGS.

An electric motor 2 operated by an elevator control device 1
The car 4 is moved up and down in the hoistway 7 by the car position detector 3 and the car 4 is in balance with the counterweight 5 via the main rope 6.

At the upper, lower, left and right ends of the counterweight 5, detection magnets 9, 9...
0, 10,... Are provided together with the communication line 11 on the left and right sides of the lower, middle, and upper portions of the guide rail 8 of the counterweight during the hoistway stroke. Further, the earthquake detection device 12 is provided in a machine room or the like.

With such a structure, when an earthquake occurs,
The earthquake detecting device 12 detects the state of shaking, makes the car 4 land on the nearest floor, and suspends the operation of the elevator.

In this state, the elevator control device 1 automatically selects a driving direction in which the car 4 and the counterweight 5 do not intersect based on the information of the position detector 3 and operates at a low speed. For example, when the car stops at the position shown in FIG. 1, the car is operated at a low speed in the ascending direction.

According to such a driving operation, the counterweight 5 performs a descending operation at a low speed, and the lower end of the counterweight 5 approaches the lower magnetic detecting device 10. At this time, it is confirmed that the detecting device 10 reacts to the magnet 9 attached to the counterweight and travels on the guide rail.

After the state of the lower end is confirmed by the above operation, the operation direction is reversed, and the operation is similarly performed at a low speed to the position of the intermediate magnetic detection device 10 near the middle. At this time, the intermediate portion detecting device 10 reacts to the magnet 9 attached to the upper end of the counterweight, and confirms the fitting state of the guide rail and the counterweight.

After the above operation, the ascending operation is further continued, and it is confirmed that the magnet 9 at the upper end of the counterweight operates to the position of the upper magnetic detecting device 10 and that the lifting of the counterweight can be surely performed over the entire lifting stroke. Restore the elevator to normal operation. At this time, if the counterweight is derailed from the guide rail, one of the magnetic detectors 10 detects the derailed state and immediately stops the operation of the elevator.

Incidentally, this detection method can be similarly applied to the derailing of the car.

[0017]

According to the present invention, inspections during elevator recovery work after an earthquake can be performed mechanically without human intervention, thereby increasing work safety and reliability, and shortening the work time. Service is also improved.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an elevator according to the present invention.

FIG. 2 is a side view of a counterweight unit of FIG. 1;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 elevator control device 2 hoisting motor 3 position detection device 4 car 5 counterweight 6 main rope 7 hoistway 8 guide rail of counterweight 9 magnet 10 upper, middle, lower magnetic detector 11 communication line 12 earthquake detector

Claims (2)

[Claims] 1. An elevator comprising a car and a counterweight, and a control device for operating the car, etc., wherein magnets are attached to left, right, upper and lower ends of the counterweight, respectively, and the counterweight is correspondingly provided. Magnetic detectors are provided at required locations on the upper, middle, and lower portions of the left and right guide rails to detect a fitting state of the counterweight with the guide rail, and output this detection output to the operation control device. An elevator provided with a derailing detection device for an input counterweight. 2. An elevator earthquake control operation control device for stopping a car when an earthquake occurs in the car operation control device, wherein when the car is stopped by operating the earthquake control operation control device, a stop position of the car is determined. The driving direction of the car is selected in a direction in which the car and the counterweight do not rub against each other, and the car is operated at a low speed, and the fitting state of the weight is detected by the counterweight removal rail detection device. The elevator according to claim 1.