KR101080601B1 - Elevator apparatus - Google Patents

Abstract

In an elevator apparatus, a car is lifted and lifted by several hoisting machines. The hoist is provided with a brake device, respectively. The brake device is individually controlled by the corresponding brake control means. Each brake control means detects the rotation state of the corresponding hoisting machine at the time of emergency braking, and controls the braking force of the corresponding brake device according to the detected rotation state.

Description

Elevator device {ELEVATOR APPARATUS}

The present invention relates to an elevator apparatus for elevating one car by a plurality of hoisting machines.

In recent years, with the rise of buildings, elevators that can move more passengers faster have been required. On the other hand, there is a method of increasing the size of a car, but in order to do so, a large torque machine with a large torque and a large output is required, resulting in a high production cost, lifting, and installation cost. . On the other hand, the elevator apparatus which raises and lowers one car with two hoisting machines without making a sizing machine large (for example, refer patent document 1).

Patent Document 1: Japanese Patent Application Laid-Open No. 7-42063

In the conventional elevator apparatus as described above, it is not considered how to stop the two hoisting machines during emergency braking, and the operation timing of the brake device of the two hoisting machines is not intended, and there is a concern that the deceleration of the car may be excessive. There was.

This invention is made | formed in order to solve the above subjects, and an object of this invention is to obtain the elevator apparatus which can decelerate and stop a plurality of hoisting machines more appropriately at the time of emergency braking.

An elevator apparatus according to the present invention comprises: a plurality of hoisting machines each having a brake device; An elevator car lifted by a hoist; And a plurality of brake control means for individually controlling the corresponding brake device, wherein each brake control means detects the rotation state of the corresponding hoisting machine at the time of emergency braking, and braking force of the corresponding brake device in accordance with the detected rotation state. To control.

In addition, an elevator apparatus according to the present invention includes: a plurality of hoisting machines each having a brake device; An elevator car lifted by a hoist; And brake control means for controlling the brake device, wherein the brake control means detects the rotational state of one hoisting machine at the time of emergency braking, and controls the braking force of the brake device of at least two hoisting machines according to the detected rotational state. do. In addition, an elevator apparatus according to the present invention includes: a plurality of hoisting machines each having a brake device; An elevator car lifted by a hoist; And brake control means for controlling the brake device, wherein the brake control means detects the running state of the car at the time of emergency braking and controls the braking force of the brake device of at least two hoisting machines in accordance with the detected running state.

In addition, an elevator apparatus according to the present invention includes: a plurality of hoisting machines each having a brake device; An elevator car lifted by a hoist; Brake control means for controlling the brake device; And emergency stop detecting means for detecting the occurrence of the emergency stop command, wherein the emergency stop detecting means, when detecting the occurrence of the emergency stop command, separates at least one brake device from the hoisting machine from the brake control means to perform braking operation immediately. The brake control means controls the braking force of the brake device of the hoist that is to be controlled so that the deceleration of the at least one hoist that is to be controlled is a predetermined deceleration during emergency braking.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the elevator apparatus by Embodiment 1 of this invention.

FIG. 2 is a graph showing rotation speed, deceleration, an energizing command to the electromagnetic coil, and a time change of the electromagnetic coil current during emergency braking of one of the hoisting machines of FIG. 1.

It is a block diagram which shows the elevator apparatus by Embodiment 2 of this invention.

4 is a graph showing the rotational speed during the emergency braking of one of the hoisting machines of the elevator apparatus according to the third embodiment of the present invention, the excitation command to the electromagnetic coil, and the time change of the electromagnetic coil current.

It is a block diagram which shows the elevator apparatus by Embodiment 4 of this invention.

It is a block diagram which shows the elevator apparatus by Embodiment 5 of this invention.

It is a block diagram which shows the elevator apparatus by Embodiment 6 of this invention.

It is a block diagram which shows the elevator apparatus by Embodiment 7 of this invention.

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment of this invention is described with reference to drawings.

Embodiment 1.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the elevator apparatus by Embodiment 1 of this invention. In the figure, the car 1 and the counterweight 2 are suspended in the hoistway by suspending means 3 and are lifted by the driving force of the first and second hoisters 4, 5. The suspending means 3 comprise at least one first main rope 6 and at least one second main rope 7. As the first and second main ropes 6 and 7, a rope having a circular cross section or a rope having a belt shape is used.

The first hoist 4 has a first drive sheave 8, a first motor 9 for rotating the first drive sheave 8, and a first brake that is integrally rotated with the first drive sheave 8. And a first brake device 11 that brakes rotation of the first brake wheel 10 and the first drive sheave 8.

The first brake device 11 presses a first brake shoe folded on the first brake wheel 10 and presses the first brake shoe on the first brake wheel 10. It has a 1st brake spring and a 1st electromagnet which opens a 1st brake shoe from the 1st brake wheel 10 in resistance to a 1st brake spring. The first electromagnet is provided with the first electromagnet.

The second hoist 5 has a second drive sheave 12, a second motor 13 for rotating the second drive sheave 12, and a second brake wheel 14 which is integrally rotated with the second drive sheave 12. ) And a second brake device 15 for braking the rotation of the second brake wheel 14 and the second drive sheave 12.

The second brake device 15 includes a second brake shoe that is folded on the second brake wheel 14, a second brake spring that presses the second brake shoe on the second brake wheel 14, and a second brake spring. It has a 2nd electromagnet which resists and opens a 2nd brake shoe from the 2nd brake wheel 14. As shown in FIG. The second electromagnet is provided with the second electromagnet.

The first main rope 6 is wound around the first drive sheave 8. The second main rope 7 is wound around the second drive sheave 12. As the first and second brake wheels 10 and 14, for example, a brake disk or a brake drum is used.

The first motor 9 is provided with a first speed detector 16. The signal from the first speed detector 16 is input to the first brake control means 17. The first brake control means 17 controls the first brake device 11 based on the signal from the first speed detector 16. That is, the first brake control means 17 energizes and de-energizes the first electromagnetic coil of the first brake device 11 according to the signal from the first speed detector 16. .

The second motor 13 is provided with a second speed detector 18. The signal from the second speed detector 18 is input to the second brake control means 19. The second brake control means 19 controls the second brake device 15 based on the signal from the second speed detector 18. That is, the second brake control means 19 excites and demagnetizes the second electromagnetic coil of the second brake device 15 in accordance with the signal from the second speed detector 18.

FIG. 2 is a graph showing the rotation speed, deceleration rate, excitation command to the electromagnetic coil, and time variation of the electromagnetic coil current during one emergency braking of the hoisting machines 4 and 5 of FIG. 1.

가 소정값(문턱값)

0을 넘으면, 브레이크 제어 수단(17, 19)은 전자 코일로의 여기 지령을 온으로 한다. 이에 의해, 브레이크 장치(11, 15)의 제동력이 저감되어 감속도

가 저하된다. When a command (emergency stop command) for suddenly stopping the car 1 is generated, energization to the motors 9 and 13 is cut off and the electromagnetic coils of the brake devices 11 and 15 are demagnetized. Deceleration at time T1

Is a predetermined value (threshold)

If it exceeds 0, the brake control means 17, 19 turn on the excitation command to the electromagnetic coil. As a result, the braking force of the brake devices 11 and 15 is reduced to reduce the deceleration rate.

Is lowered.

가 소정값

O보다 낮아지면, 브레이크 제어 수단(17, 19)은 전자 코일로의 여기 지령을 오프로 한다. 이에 의해, 브레이크 장치(11, 15)의 제동력이 증대되어 감속도

가 커진다. Thereafter, at time T2, the deceleration rate

Is a predetermined value

When lower than O, the brake control means 17, 19 turn off the excitation command to the electromagnetic coil. As a result, the braking force of the brake devices 11 and 15 is increased to reduce the deceleration rate.

Becomes large.

0에 가까운 감속도로 감속되어 정지된다. The first and second brake control means 17, 19 independently perform such on / off operation of the excitation command until the time T3 at which the first and second hoist 4 and 5 stop. Thereby, the 1st and 2nd hoist 4 and 5 are predetermined | prescribed deceleration

The motor decelerates and stops at a deceleration close to zero.

In such an elevator device, the brake control means 17, 19 detect the rotational state of the hoist 4, 5 corresponding to the emergency braking, that is, deceleration, and correspond to the brake device 11, 15 according to the detected deceleration. By controlling the braking force of), it is possible to decelerate and stop the hoisting machines 4 and 5 more appropriately during emergency braking.

Embodiment 2.

3 is a block diagram which shows the elevator apparatus by Embodiment 2 of this invention. In the figure, emergency stop detection means 20 is connected to the first and second brake control means 17 and 19. The emergency stop detecting means 20 detects the occurrence of the emergency stop command and synchronously activates the braking force control by the first and second brake control means 17, 19. Another configuration is the same as that of the first embodiment.

In such an elevator apparatus, since the emergency stop detection means 20 starts the control operation of the braking force by the first and second brake control means 17, 19, the first and second main ropes 6, 7. ), The tension difference can be reduced to prevent damage to the main rope (6, 7).

Embodiment 3.

Next, Embodiment 3 of this invention is described. In the second embodiment, the decelerations of the hoisting machines 4 and 5 are detected by the brake control means 17 and 19. In the third embodiment, the rotational speeds of the hoisting machines 4 and 5 are detected. That is, the brake control means 17, 19 generate the control target speed which decelerates with the predetermined deceleration by setting the rotational speed as an initial value when the emergency stop command of the corresponding hoist 4, 5 is generated, and the corresponding hoist 4, The braking force of the brake devices 11 and 15 of the corresponding hoist 4 and 5 is controlled so that the rotation speed of 5) follows the control target speed. The other configuration is the second embodiment and Orient.

, 시각 T1로부터의 경과 시간을 t로 하여 이하의 연산을 실행한다. FIG. 4 is a graph showing the rotation speed, the excitation command to the electromagnetic coil, and the time change of the electromagnetic coil current during one emergency braking of the hoisting machines 4 and 5 of FIG. 1. In the figure, time T1 is a time when the occurrence of the emergency stop command is detected, and the rotation speeds of the hoisting machines 4 and 5 at this time are V0. The brake control means 17, 19 provide the upper and lower limits of the control speed by ± V1 and the predetermined deceleration.

The following calculation is performed with elapsed time from time T1 as t.

× tㆍㆍㆍ(1)V2 (t) = (V0 + V1)-

× t ... (1)

× tㆍㆍㆍ(2)V3 (t) = (V0-V1)-

× t ... (2)

Equation 1 is a control target speed pattern serving as an upper limit, and Expression 2 is a control target speed pattern serving as a lower limit.

V3(t)이면 전자 코일을 여기시킨다. 또, V(t)

V2(t)이면 전자 코일을 소자시킨다. 이와 같은 알고리즘으로 브레이크 장치(11, 15)를 제어하는 것에 의해, 권상기(4, 5)는 소정의 감속도

근방의 감속도로 감속되어 정지된다. The brake control means 17, 19 compare the rotational speed V (t) of the hoisting machine 4, 5 at that time with the control target speed pattern, and V (t).

If V3 (t), the electromagnetic coil is excited. V (t)

If V2 (t), the electromagnetic coil is formed. By controlling the brake devices 11 and 15 with such an algorithm, the hoist 4 and 5 have a predetermined deceleration rate.

It is decelerated at a nearby deceleration and stopped.

In this manner, by controlling the braking force according to the rotational speed, not the deceleration of the hoisting machines 4 and 5, it is possible to decelerate and stop the hoisting machines 4 and 5 more appropriately during emergency braking.

Embodiment 4.

Next, FIG. 5: is a block diagram which shows the elevator apparatus by Embodiment 4 of this invention. In the figure, the brake devices 11 and 15 are controlled by the common brake control means 21. The brake control means 21 detects the deceleration of the second hoist 5 at the time of emergency braking, and controls the braking force of the first and second brake devices 11 and 15 in accordance with the detected deceleration. The concrete control method of a braking force is 1st Embodiment and Orient.

In such an elevator device, the brake control means 21 detects the deceleration of the second hoist 5 during emergency braking, and controls the braking force of the brake devices 11 and 15 according to the detected deceleration, so that during the emergency braking The hoist 4, 5 can be decelerated more appropriately and stopped. Moreover, since one brake control means 21 is used for the first and second hoisters 4 and 5, the number of brake control means 21 and the speed detector 18 can be reduced, thereby reducing the cost. You can.

Further, in the fourth embodiment, the braking force of the brake devices 11 and 15 is controlled by detecting the deceleration of the second hoist 5, but as shown in the third embodiment, according to the rotational speed of the second hoist 5 The braking force of the brake devices 11 and 15 may be controlled.

Embodiment 5.

6 is a block diagram which shows the elevator apparatus by Embodiment 5 of this invention. In the figure, the brake devices 11 and 15 are controlled by common brake control means 22. The brake control means 22 detects the deceleration which is the driving state of the cage | basket | car 1 at the time of emergency braking, and controls the braking force of the 1st and 2nd brake apparatuses 11 and 15 according to the detected deceleration. The concrete control method of a braking force is 1st Embodiment and Orient.

Moreover, the brake control means 22 detects the deceleration of the car 1 based on the signal from the speed detector 23 which generates the signal according to the speed of the car 1. The speed detector 23 is provided in the governor 24, for example. The counterweight is divided into a first counterweight 2a suspended by the first main rope 6 and a second counterweight 2b suspended by the second main rope 7.

In such an elevator apparatus, the brake control means 22 detects the deceleration of the car 1 at the time of emergency braking, and controls the braking force of the brake apparatuses 11 and 15 according to the detected deceleration, and thus the hoisting machine at the time of emergency braking. (4, 5) can be decelerated more appropriately and stopped.

In addition, although the braking force of the brake apparatuses 11 and 15 was controlled by detecting the deceleration of the cage | basket | car 1 in Embodiment 5, the brake apparatuses 11 and 15 are based on the traveling speed which is the running state of the cage | basket | car 1; The braking force of may be controlled. In this case, the brake control means 22 generates the control target speed which decelerates by the predetermined deceleration by making the running speed of the cage | basket | car 1 the initial value at the time of emergency stop command generation, and the running speed of the cage | basket | car 1 controls. The braking force of the brake devices 11 and 15 is controlled to follow the target speed.

Embodiment 6.

Next, FIG. 7: is a block diagram which shows the elevator apparatus by Embodiment 6 of this invention. In the figure, the brake devices 11 and 15 are controlled by the common brake control means 21. A brake control stop means (switch) 25 is provided between the brake control means 21 and the first brake device 11.

Emergency stop detection means 26 is connected to the brake control means 21 and the brake control stop means 25. The emergency stop detection means 26 detects the occurrence of the emergency stop command, activates the braking force control by the brake control means 21, and separates the first brake device 11 from the brake control means 21. Activate braking on the spot. The brake control means 21 controls the braking force of the second brake device 15 to be controlled so that the deceleration of the second hoist 5 to be controlled is a predetermined deceleration during emergency braking.

In such an elevator device, the brake device 11 of the hoist 4 is separated from the brake control means 21 at the time of emergency braking so that braking operation is performed on the fly, even when a failure occurs in braking force control by the brake control means 21. By the brake device 11, the car 1 can be stopped more reliably. That is, in the sixth embodiment, a method of controlling the deceleration of the hoist 5 while selecting the appropriate deceleration stop method of the hoist 4 and 5 during emergency braking is selected. Therefore, by such a control method, it is possible to decelerate and stop the hoisting machines 4 and 5 more appropriately during emergency braking.

Embodiment 7.

Next, FIG. 8 is a block diagram which shows the elevator apparatus by Embodiment 7 of this invention. This Embodiment 7 combines Embodiment 5 and Embodiment 6. As shown in FIG. That is, the brake control stop means 25 is provided between the brake control means 22 and the first brake device 11 of the fifth embodiment, and the first brake device (by the emergency stop detection means 26 at the time of emergency braking) 11 is to be separated from the brake control means 22.

Even with such an elevator apparatus, the hoisting machines 4 and 5 can be decelerated more appropriately and stopped at the time of emergency braking.

In addition, the brake control means can be configured by, for example, a circuit including a microcomputer.

In the above example, two hoisting machines were used, but three or more hoisting machines may be used. Incidentally, the occurrence of the emergency stop command may be detected by a signal from the elevator control device, or may be detected independently by the brake control means. For example, the emergency stop command may be determined by detecting the approach or contact of the brake shoe to the brake wheel. Moreover, even if the car speed is more than the predetermined value, when the electric current value of the electromagnetic coil of a brake apparatus is less than a predetermined value, you may determine that the emergency stop command generate | occur | produced.

Furthermore, in the above example, although the deceleration or the speed was detected by the signal from the speed detector provided in the hoist or the governor, the signal from the speed sensor of the car or the car provided in the hoistway may be used.

In addition, the brake control means may perform both the brake control at the time of normal operation and the brake control at the time of generating the emergency stop command, or may perform only the brake control at the time of generating the emergency stop command. In the latter case, brake control in normal driving is performed by the driving control means, and brake control means independent of the driving control means is used.

According to the present invention, it is possible to provide an elevator apparatus capable of more appropriately decelerating and stopping a plurality of hoisting machines during emergency braking.

Claims (8)

A plurality of hoisting machines each having a brake device, An elevator car lifted by the hoist, and A plurality of brake control means for individually controlling the corresponding brake device, Each brake control means detects the rotation state of the corresponding hoisting machine at the time of emergency braking, and controls the braking force of the corresponding brake device according to the detected rotation state, An elevator apparatus further comprising emergency stop detection means for detecting the occurrence of an emergency stop command and synchronously activating a braking force control by said brake control means. delete The method according to claim 1, Each said brake control means produces | generates the control target speed which decelerates with a predetermined deceleration by setting the rotational speed at the time of the emergency stop command generation of the said hoisting machine as an initial value, and makes the rotational speed of the said hoisting machine follow a control target speed. And an elevator device for controlling the braking force of the brake device of the hoisting machine. delete delete delete delete A plurality of hoisting machines each having a brake device, The car lifted by the hoist; Brake control means for controlling the brake device, Emergency stop detection means for detecting occurrence of an emergency stop command, and A brake control stop means for separating the at least one brake device of the hoisting machine from the brake control means to immediately brake operation when the emergency stop detection means detects the emergency stop command, And the brake control means controls the braking force of the brake device of the hoist that is the control target so that the deceleration of the at least one hoist that is the control target during the emergency braking is a predetermined deceleration degree.

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