JPH0710402A - Elevator driving device control method and driving device used therefor - Google Patents

Abstract

PURPOSE:To smoothly start elevation of an elevator and stop it at an accurate position by detecting an output shaft rotation speed and elevating time or elevating position for switching from an auxiliary motor to a main motor, and starting low speed reduction ratio rotation of the output shaft by means of the main motor in idle rotation. CONSTITUTION:In a driving device 1, a main motor 3 and an auxiliary motor 4 are arranged on both sides of a reduction gear 2. An output shaft 22 is rotatably provided extending in the fore and aft direction and orthogonally crossing an input shaft 20, in a case 26 of the speed reduction gear 2. A take-up drum of an elevator is fitted to a protruding part of the case 26 of the output shaft 22. When the output shaft 22 reaches a specified rotation speed, specified time is elapsed, and the elevator reaches a specified position, switching between the main motor 3a and the auxiliary motor 4 having different speed reduction ratios slowly starts the output shaft 22 of the driving device 1 to change-over regenerative brake of the auxiliary motor 4 to an auxiliary speed reduction gear 6 for slow stopping. Accordingly, accurate stopping is conducted regardless of load or no-load of the elevator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of controlling a drive motor device which is most suitable for driving an elevator for exclusive use of luggage and a drive motor device used therefor.

[0002]

2. Description of the Related Art For example, an elevator is often provided with a drive motor device as a drive source. In such a drive motor device, the rotation of the drive motor is decelerated and output by a speed reducer to rotate the take-up drum or the sheave of the elevator, but from the viewpoint of ensuring safety in the event of a motor failure, a worm / worm wheel type speed reducer is used. It is common to use a machine.

Usually, in an elevator for exclusive use of luggage, the luggage is often mounted on a trolley with casters for loading and unloading. Therefore, unless the elevator is accurately stopped at a predetermined position, the caster will be placed between the elevator and the floor. It becomes difficult to carry in and carry out the trolley by being caught in the step.

By the way, recent buildings have a tendency toward higher floors, and it takes a long time to go up and down. Therefore, it is required to speed up and down. However, simply increasing the speed of the elevator makes it difficult to stop it accurately at a predetermined position. Especially, in the case of an elevator dedicated to luggage, the load on the elevator is greatly different between when there is no luggage and when luggage is loaded. Is. In addition, if a large-capacity drive motor device is adopted to speed up and down and the ascent and descent is suddenly started, a large impact is exerted on the luggage, which may cause damage to the luggage.

On the other hand, for an occupant elevator, an inverter system for controlling the frequency of the motor power supply and a system for controlling the motor voltage are adopted, and the elevator is gradually started by slowly starting the rotation of the drive motor. A method is widely adopted in which the elevator is accurately stopped at a predetermined position by slow-stopping the rotation of the.

[0006]

However, in any of the control methods for the occupant elevator, the drive motor is started and stopped by electrically controlling the motor rotation speed.
In addition to the possibility of noise pollution, it requires complicated and expensive control circuits, resulting in high cost, and it is difficult to use it for a baggage elevator which requires low cost.

The inventors of the present invention provide a start / stop mechanism composed of a clutch plate on the rotary shaft of the drive motor, and when the ascending / descending starts, the clutch plate is brought into sliding contact to start the rotation of the drive shaft at a slow speed. Next, disconnect the clutch plate and start it at a rapid acceleration, while stopping the lifting of the elevator, cut the clutch plate and stop the rotation of the drive shaft by abrupt deceleration, then slide the clutch plate to make a slow deceleration. We are proposing a method to shut it down.

In this situation, according to the method different from the above-mentioned start-stop system, the elevator can smoothly start the raising and lowering of the elevator without causing an increase in cost and can stop the elevator at an accurate position. An object of the present invention is to provide a method for controlling a driving device for a vehicle.

[0009]

Therefore, the control method of the elevator drive apparatus according to the present invention is such that the rotation of the output shaft is started at a slow speed increase at the time of starting the vertical movement, and then the speed is reduced when the speed is increased to start up. A main motor having a speed ratio and an auxiliary motor having a high reduction ratio are provided, and the auxiliary motor starts rotation of the output shaft at a high reduction ratio, and the rotation shaft of the main motor idles to rotate the output shaft at a rotational speed of the output shaft. It is characterized in that the ascending / descending time or the ascending / descending position is detected, the auxiliary motor is switched to the main motor, and the idling main motor starts the reduced speed ratio rotation of the output shaft.

Further, according to the control method of the elevator drive apparatus of the present invention, when the rotation of the output shaft is suddenly decelerated when the elevator is stopped, and then the mode is switched to the slow deceleration and then lowered, the main motor having a reduced speed ratio and the high reduction ratio are used. The auxiliary motor is provided to switch from the steady rotation state of the output shaft by the main motor to the regenerative braking by the auxiliary motor to start rapid deceleration, detect the rotation speed, the lifting time or the lifting position of the output shaft, and It is characterized in that the driving by the auxiliary motor is stopped and the slow deceleration is performed by the braking by the braking mechanism.

When the control method as described above is carried out, it is preferable that the drive device is constructed by providing a main drive source and an auxiliary drive source on the input shaft of the speed reducer. That is, according to the present invention, the main drive source is provided on one side of the input shaft of the speed reducer and the auxiliary drive source is provided on the other side of the input shaft, and the main drive source uses the rotary shaft as the input shaft of the speed reducer. The connected main motor and a pair of clutch plates are connected to each other by the urging force of a spring member to brake the rotation of the main motor and attract one of the clutch plates in the axial direction by an electromagnetic magnet. The auxiliary drive source includes an auxiliary motor, an auxiliary speed reducer that reduces the rotation of the auxiliary motor, an output shaft of the auxiliary speed reducer, and an input shaft of the speed reducer. It is possible to provide a drive device for an elevator including a clutch mechanism that disconnects between the two.

[0012]

[Operation and Effect of the Invention] When starting lifting of the elevator,
First, the output shaft is rotated by the auxiliary motor, and the main motor also runs idle, but since the speed reduction ratio of the auxiliary motor is high, the speed of the output shaft is increased more slowly than when starting the rotation with the main motor with the reduced speed ratio. it can. The output shaft has reached the specified speed,
When a predetermined time elapses after the elevator is started or when the elevator moves up and down to a predetermined position, the auxiliary motor is switched to the main motor, and the main motor with a reduced speed ratio rapidly increases the rotation of the output shaft to the steady rotation speed. . At this time, since the rotating shaft of the main motor is also started up to the predetermined rotation speed by the auxiliary motor, there is no shock in switching from the auxiliary motor to the main motor, and smooth switching can be performed.

When stopping the lifting of the elevator, first, the steady rotation state of the main motor is switched to regenerative braking by the auxiliary motor. However, since the auxiliary motor has a high reduction ratio, the rotation of the output shaft can be rapidly reduced. When the output shaft reaches a predetermined number of revolutions and a predetermined time has passed since the elevator started to move up or down, or when the elevator moves up and down to a predetermined position, the drive by the auxiliary motor is stopped and the braking mechanism brakes the output shaft. The rotation of can be slowed down slowly. At this time, since the output shaft has a sufficiently low rotation speed, it is possible to smoothly switch from the auxiliary motor to the braking mechanism with almost no shock, and it is possible to accurately stop at a desired position by braking the braking mechanism.

As described above, since the output shaft of the elevator drive device is slow-started by switching between the auxiliary motor and the main motor, the regenerative braking by the auxiliary motor is switched to the braking by the braking mechanism to stop slowly. , It is possible to prevent the impact of loading etc. from being applied to the loaded luggage by starting the ascending / descending smoothly and stopping it at the desired position accurately, and most of the ascending / descending can be speeded up. Can be raised and lowered in a short time.
As a result, a complicated and expensive electric control circuit for frequency control and voltage control is not required, the risk of noise pollution can be eliminated, and the start / stop control of the drive device that is most suitable for the elevator for exclusive use of luggage is an inexpensive device. Can be performed with high precision.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the specific examples shown in the drawings. FIG. 1 shows an elevator drive device used in a control method according to an embodiment of the present invention. In the figure,
The drive unit 1 is configured by arranging a main motor 3 and an auxiliary motor 4 on both sides of a speed reducer 2, a braking mechanism 5 is provided behind the main motor 3, and between the speed reducer 2 and the auxiliary motor 4. Is provided with an auxiliary reducer 6 and an electromagnetic clutch 7, the main motor 3 and the braking mechanism 5 constitute a main drive source, and the auxiliary motor 4, the auxiliary reducer 6 and an electromagnetic clutch 7 constitute an auxiliary drive source. Has been done.

The input shaft 2 is provided in the case 26 of the speed reducer 2.
0 extends in the left-right direction and is rotatably supported by a bearing 24. A worm gear 21 is formed on the input shaft 20. An output shaft 22 extends in the front-rear direction and is rotatably provided in the case 26 so as to be orthogonal to the input shaft 20.
A worm wheel 23 is provided on the output shaft 22, and the worm wheel 23 is meshed with the worm gear 21.
A winding drum or sheave (not shown) of the elevator is attached to the protruding portion of the case 26 of the output shaft 22.

A case 34 of the main motor 3 is fixed to a side surface of the case 26 of the speed reducer 2. The main motor 3 has a rotor 32 arranged inside a stator 30 and the rotor 32 is attached to a rotary shaft 31. The rotary shaft 31 is rotatably supported by front and rear bearings 33, and the rotary shaft 31 is connected to one end side of the input shaft 20 of the speed reducer 2.

The mounting piece 50 of the braking mechanism 5 is spline-engaged with the outer surface of the rear end portion of the rotary shaft 31 of the main motor 3, and a locking projection is formed on the outer peripheral surface of the mounting piece 50. Two lining plates (clutch plates) 5 with locking projections
1 is externally slidably fitted in the axial direction, and two fixing plates 52 made of electromagnetic iron plates are provided on the lining plate 51 so as to sandwich them, and the fixed iron plates 52 are planted in the main motor case 34. The fixed iron plate 52 and the lining plate 51 are slidably supported by the installed guide pillars 53, and the coil spring 5
It is urged by 6 in the direction of mutual connection. A mounting plate 54 is attached to the guide pillar 53 with bolts and nuts, and an electromagnetic magnet 55 is fixed to the mounting plate 54. The electromagnetic magnet 55 attracts the fixed iron plate 51 to separate the fixed iron plate 52 and the lining plate 51. The coil spring 56 is cut against the biasing force of the coil spring 56.

On the other hand, the case 70 of the electromagnetic clutch 7 is fixed to the case 26 of the speed reducer 2 with bolts and nuts.
The other end side of the input shaft 20 of the speed reducer 2 extends into the case 70, a lining plate 71 is fixed to the input shaft 20, and a lining plate 72 is disposed so as to face the lining plate 71. The surface of the plate 72 is subjected to a ring-shaped lining treatment 73 (for example, lining material sticking or molding). This lining plate 72 has an input shaft 7
6 is slidably attached, is biased in the cutting direction by a coil spring 75, and an electromagnetic iron plate 77 is fixed to the lining plate 72 at a predetermined interval.
And an lining plate 72, an electromagnetic magnet 74 is disposed between the case 70 and the case 70.
It is fixed by a nut.

A case 60 of the auxiliary speed reducer 6 is attached to the case 70 of the electromagnetic clutch 7, and the auxiliary speed reducer 6 is attached.
Of the auxiliary clutch 4 is connected to the input shaft 76 of the electromagnetic clutch 7, the input shaft 62 of the auxiliary speed reducer 6 is connected to the rotary shaft 40 of the auxiliary motor 4, and the auxiliary motor 4 is smaller than the main motor 3. The motor is being used.

Next, the control method of the present invention will be described with reference to FIG. When starting lifting of the elevator, first, the braking mechanism 5
Energize to cut the lining plate 51 and the fixed iron plate 52,
The electromagnetic clutch 7 is energized to connect the lining plates 71 and 72. When the auxiliary motor 4 is energized in this state, the rotation of the auxiliary motor 4 is decelerated by the auxiliary speed reducer 6 to reduce the speed of the speed reducer 2.
Is input to the input shaft 20, is decelerated by the speed reducer 2, is transmitted to the take-up drum of the elevator, and the ascending / descending is started.

At this time, since the speed reduction ratio of the rotation transmission path of the auxiliary motor 4 is large, the elevator smoothly starts ascending / descending and is slowly accelerated (see a in FIG. 2). Further, since the main motor 3 is connected to the input shaft 20 of the speed reducer 2, the main motor 3 spins idle and the number of rotations of the main motor 3 rises corresponding to the rising of the rotation of the output shaft 22 of the speed reducer 2.

A sensor or a timer detects the number of revolutions of the output shaft 22 of the speed reducer 2, the elapsed time after starting the ascent and descent, and the ascending / descending position, which is a predetermined number of revolutions, for example, the rated rotation of the auxiliary motor 4. When a predetermined time has elapsed after the number of the motors has reached the predetermined number or when the elevator has reached a predetermined position, the energization of the auxiliary motor 4 is stopped and the energization of the electromagnetic clutch 7 is stopped to stop the lining plate 72. Is urged by the coil spring 75 to cut from the lining plate 71,
When the main motor 3 is energized at the same time, the idling main motor 3 is driven as it is, and the rotation of the rotary shaft 31 of the main motor 3 is transmitted to the input shaft 20 of the speed reducer 2 which is being rotated. Since there is no shock from the motor 4 to the main motor 3 and the main motor 3 is smoothly switched, and the rotation transmission path of the main motor 3 has a reduction ratio smaller than that of the auxiliary motor 4, the elevating and lowering of the elevator is performed by the main motor 3. Is rapidly accelerated to the rated rotation speed of the main motor 3 and the rated rotation speed of the main motor 3 is reached to perform steady operation (see b in FIG. 2), whereby high-speed ascent / descent is performed.

On the other hand, when stopping the elevation of the elevator, the main motor 3 is stopped from being energized, and at the same time, the electromagnetic clutch 6 is connected to energize the auxiliary motor 4. Then, the output shaft 22
Due to the difference between the rotation of the auxiliary motor 4 and the rotation of the auxiliary motor 4, the regenerative braking of the auxiliary motor 4 acts, and the lifting and lowering of the elevator is rapidly decelerated (see time c in FIG. 2). When the output shaft 22 reaches a predetermined number of revolutions, for example, the rated number of revolutions of the auxiliary motor 4, and a predetermined time elapses after the elevator is started or when the elevator reaches a predetermined position, the auxiliary motor 4, the electromagnetic clutch 6, and When the energization of the braking mechanism 5 is stopped, the braking mechanism 5 works to brake the rotating shaft 31 of the main motor 3, the output shaft 22 is slowly decelerated, and the elevator is smoothly and accurately stopped at a predetermined position. Further, since the speed reduction ratio of the rotation transmission system of the auxiliary motor 4 is large, the small auxiliary motor 4 can surely stop regardless of the load / no-load of the elevator.

As described above, the main motors 3 having different reduction ratios are used.
Drive device 1 by switching between
Since the output shaft 22 is slowly started to switch from the regenerative braking of the auxiliary motor 4 to the braking by the braking mechanism 6 to perform the slow stop, the switching control can be performed very easily and the frequency control and the voltage control are complicated. No expensive electric control circuit is required, the risk of noise pollution can be eliminated, and the optimum start / stop control for the elevator for exclusive use of luggage can be performed inexpensively and highly accurately, and its practical effect is very large. Is.

Further, since the main motor 3 and the auxiliary motor 4 are arranged on both left and right sides of the speed reducer 2, the rotational moment with respect to the rotation of the output shaft 22 is well balanced.

FIG. 3 shows another driving device to which the control method of the present invention is applied. In the figure, the same reference numerals as those in FIG. 1 indicate the same or corresponding parts. In this device, a worm
Instead of a worm wheel type speed reducer, a step gear type speed reducer 2 is used, and an output shaft 22 of the speed reducer 2 is configured to extend in parallel with the input shaft 20.

[Brief description of drawings]

FIG. 1 is a cross-sectional configuration diagram showing an elevator drive device to which a control method according to an embodiment of the present invention is applied.

FIG. 2 is a diagram for explaining the control method.

FIG. 3 is a cross-sectional configuration diagram showing another elevator drive device to which the control method according to an embodiment of the present invention is applied.

[Explanation of symbols]

1 Drive device 2 Reduction gear 3 Main motor 4 Auxiliary motor 5 Braking mechanism 6 Auxiliary reduction gear 7 Clutch mechanism

Claims (3)

[Claims] 1. In a drive device for a lift, when starting rotation of an output shaft at a slow acceleration at the start of lifting, and then switching to a rapid speed to start up, a main motor having a low reduction ratio and an auxiliary motor having a high reduction ratio are provided. Is provided
The auxiliary motor starts rotation of the output shaft at a high speed reduction ratio and also causes the rotation shaft of the main motor to idle, and detects the number of revolutions, the lifting time or the lifting position of the output shaft to detect the auxiliary motor from the main motor. The control method for the elevator drive device is characterized in that the main motor, which is idling, is caused to start rotating at a reduced speed ratio of the output shaft. 2. In a drive device for an elevator, when the rotation of the output shaft is rapidly decelerated when the elevator is stopped and then switched to a slow deceleration to bring it down, a main motor having a low reduction ratio and an auxiliary motor having a high reduction ratio are provided.
Switching from the steady rotation state of the main motor to regenerative braking by the auxiliary motor to start rapid deceleration, stop the drive by the auxiliary motor by detecting the number of rotations of the output shaft, the lifting time or the lifting position, and stop the braking mechanism. A method for controlling an elevator drive device, characterized in that slow deceleration is performed by braking by the. 3. A drive device for raising and lowering an elevator by outputting the rotation of a drive motor through a reducer, wherein a main drive source is provided on one side of the input shaft of the reducer and an auxiliary drive is provided on the other side. A main motor having a rotating shaft connected to the input shaft of the speed reducer and a pair of clutch plates connected to each other by a biasing force of a spring member. A braking mechanism that brakes the rotation of the motor and axially attracts one of the clutch plates with an electromagnetic magnet to disconnect the clutch plate, while the auxiliary drive source includes an auxiliary motor and the auxiliary motor. An elevator drive device comprising: an auxiliary speed reducer that reduces the rotation of the auxiliary motor; and a clutch mechanism that disconnects and connects an output shaft of the auxiliary speed reducer and an input shaft of the speed reducer.