JPS61127588A - Drive for elevator - 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 [Field of Application of the Invention] The present invention relates to an elevator drive device, and more particularly to an elevator drive device suitable for improving the accuracy of car landing.

[Background of the invention]

The conventional elevator drive system uses a precision-machined speed reducer and an electric motor to power it.
A dedicated DC motor or three-phase induction motor is used (Japanese Utility Model Application Publication No. 58-27272), and by controlling the speed of this motor, the accuracy of landing of the elevator car is ensured. The equipment used to perform this process is complex. For example, an AC two-speed elevator
In this case, use a motor with 4/16 or 6/24 poles, and when landing the car on the floor, change the ball just before the landing level and reduce the rated speed to 1/4. This method applies braking to the floor, but compared to the accuracy of landing achieved in these four ways, in cargo elevators etc., depending on the weight of the cargo being carried in and out, it is difficult to reach the floor.
It may cause For this reason, there are inconveniences such as the need to provide a separate floor alignment device.

Additionally, in order to improve the accuracy of landing on the floor, there is a method that uses a DC motor to reach the floor while gradually decelerating the current applied to the motor while changing the current applied to the motor in stages for elevators that run at the rated speed. The electrical equipment that performs
It requires a high degree of technical skill and has a complicated structure, making it uneconomical to use it in a cargo elevator, for example.

[Purpose of the invention]

The object of the present invention is to provide an elevator that eliminates the above-mentioned drawbacks and provides good elevator landing accuracy with a simple device.
to provide driving equipment.

[Summary of the invention]

According to the present invention, the landing accuracy of an elevator is greatly influenced by the deceleration control of the electric motor constituting the drive device.

Focusing on this, while giving a stop instruction to the traction motor operating at the rated speed, at the same time, the auxiliary motor, which is driven at low speed, is activated when the traction motor rises, and this is used to achieve ultra-low speed operation for landing on the floor. This is done by switching to the low-speed auxiliary motor and giving a simple stop command to this low-speed auxiliary motor (so that good landing accuracy can be obtained).

[Embodiments of the invention]

An embodiment of the present invention will be described with reference to FIGS. 1, 2, and 3.

x vhe-fi-O machine fJi machine beam 2f on floor 1
.

Installation: The machine base 3 is attached with the elastic body 14 interposed. A reduction gear consisting of a worm 7 and a worm wheel 8, a main motor 5 consisting of an induction motor connected to the shaft of the worm 7, a brake wheel 6, a magnet plate 215, and a worm wheel 8 are connected to the machine base 3. A hoisting machine 4 consisting of a steel wheel 11, a clutch 9 connected to the shaft of the worm 7, a clutch 16 opposing this, and a geared motor 10 as an auxiliary electric motor are combined, and a deflection wheel 12 is attached. . Steel car 11 and robe 13t
- An elevator (not shown) via the diverter wheel 12 -
The rider and counterweight are tightly connected.

FIG. 2 is a characteristic diagram illustrating the basic operation commands for operating the two electric motors configured as shown in FIG. The command is a command to start operation of the gear motor 10, D
is a command to stop the geared motor 10, which is detected by an elevator car position detector (not shown) and given to an electric control device (not shown).

F is the acceleration time of the main motor 5, G is the operating time of the main motor 5, K is the braking time by the magnetic brake 15, L is the switching time from the main motor 5 to the geared motor IO, and M is the elevator by the geared motor 10. - Indicates the operating time of the car. vl is the rated speed of the elevator car, v
2 indicates the speed of the elevator car before landing by the geared motor.

The elevator driving device thus constructed operates as follows.

When a command to start operation is given to the car using a known technique (not shown), the main motor 5 starts rotating, the steel car 11 rotates via the worm 7 and the worm wheel 8, and the lobes 13 placed on the steel car 11 rotate the car. The rider (not shown) moves. After the acceleration time F of the main motor 5 has elapsed, the passenger travels at the rated speed vl, and a stop command B is given to the main motor 5 before reaching the landing position E on the destination floor. As a result, the magnetic brake 15 operates, and the rider starts decelerating. Next, a driving start command C is given to the geared motor 10, and the electromagnetic clutch 9.16
The driving force of the geared motor 10 is transmitted through the worm 7 and the worm wheel 8 to rotate the steel wheel 11.

A stop command is given to the geared motor 10 near the landing position E, and the elevator car is stopped at the landing position EK. In addition, while giving the driving command C to the geared motor 10, the magnetic brake 15 is released, and the magnetic brake 1 is activated again when the geared motor 10 is commanded to stop.
Operate 5.

In addition, a stop command 5 for the main motor 5 and a gear motor 10 are also provided.
The switching time of driving command C to rated speed V! Adjust and decide as appropriate depending on the size.

The clutches 9 and 10 are attached and detached using known techniques.

In other words, in order to accurately stop the car at the landing position E on the destination floor, it is necessary to stop the car that is traveling at extremely low speed (approximately 6 m/m or less), and the gear motor lO
The method is to detect and give the stop instruction position of the robot, and it is extremely simple to obtain precise landing accuracy.

Further, the main motor of such a drive device can be a commercially available general-purpose motor, so it is extremely inexpensive.

FIG. 3 is a speed characteristic diagram of an elevator obtained according to an embodiment of the present invention.

According to this embodiment of the present invention, an inexpensive electric motor can be used and landing accuracy can be improved.

Figure 4 shows another embodiment of the present invention, which differs from Figure 1 in that the driving force of the geared motor 10 is transferred to the sprocket 17.18 via the chain 19tl and the clutch 9.
16, and in addition to achieving the same effect as mentioned above, it is also effective when there is a limit to the size of the machine room l or when remodeling an existing V-beta to further improve the landing accuracy. .

According to Kinoe IJI, stopping a car traveling at low speed has the effect of significantly improving the landing accuracy of the car.

Therefore, the scope of use of the present invention is wide, and it can be used in wheelchair elevators where the difference in landing level of the car is a problem, cargo elevators that transport small wheels, 7-oak lifts with batteries, etc. Applicable to special elevators such as automatic conveyors and dumbwaiters.

[Brief explanation of the drawing]

Claims (1)

[Scope of Claims] 1. In an elevator having a main motor, a speed reducer, a sheave, and a brake, and in which a car is raised and lowered by winding a rope around the sheave, the main motor is an induction motor, and an auxiliary motor that raises and lowers the car at a lower speed than the main motor is connected to the reduction gear, and a joint is provided for disconnecting the auxiliary motor and the reduction gear during operation of the main motor. Features: Elevator drive system. 2. In an elevator having a main motor, a speed reducer, a sheave, and a brake, and in which a car is run by winding a rope around the sheave, the main motor is an induction motor, and the elevator has a lower speed than the main motor. When the auxiliary motor for running the car is connected to the speed reducer via a joint to make the car run, when the car is accelerated, the auxiliary motor is disconnected at the joint and the auxiliary motor is operated by the main motor. When decelerating, the driving of the main motor is stopped and the brake is activated to decelerate the car. When the car starts to decelerate, the auxiliary motor is connected to the speed reducer, and then the The vehicle is characterized in that the brake is released and the auxiliary electric motor is driven to cause the car to run at a low speed, and then the drive of the auxiliary electric motor is stopped and the brake is operated again to stop the car. How to drive an elevator.