JPH0859128A - Elevator control equipment - Google Patents

Abstract

(57) [Summary] [Structure] The speed detector 10 is installed on the rope connected to the car 5, and the car speed output from the speed detector 10 is supplied to the speed command generation circuit 12 in the control microcomputer 17. A determiner 20 for determining that the detected speed value 18 is equal to or greater than the predetermined value 19 is provided, and the normal speed command 24 is switched to the emergency speed command 25 that reduces the speed command value 18 to the rated speed or less according to the determination result. [Effect] It is possible to provide an elevator that controls the speed of a car that can be driven to the service floor for the purpose of preventing a middle floor stop due to a governor operation when a passenger intentionally shakes the car.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator control device for preventing the operation of a governor device when a passenger intentionally shakes a car.

[0002]

2. Description of the Related Art In the prior art, as means for preventing vibration of a governor rope of a hydraulic elevator, Japanese Patent Laid-Open No. 56-78 has been proposed.
As described in Japanese Patent No. 783, there is one that prevents the governor rope from vibrating by engaging the governor rope and the pulling lever with a certain interval of clearance and connecting the governor rope to the car through a buffer. Proposed. Further, as described in Japanese Utility Model Application Laid-Open No. 54-50375, there has been proposed a method for preventing a governor operation by adding a damping element to a pendulum portion for converting a governor pulley rotation speed into a displacement.

[0003]

In the above prior art, when the passenger deliberately shakes the car during elevator travel, the car resonates with the natural vibration frequency of the rope system, and the car vibrates greatly in the vertical direction. Occurs. Therefore, the governor operation can be prevented by the conventional technology up to a certain level of vibration force. However, if the passengers inside the car vibrate strongly, and the car vibration is caused by a few people, the vibration of the car will be governor rope. As a result, the governor switch in the governor device operates and the elevator stops at an intermediate floor other than the stop floor, making it impossible to move up and down, trapping passengers.

It is an object of the present invention to provide an elevator for controlling the speed of a car that can be driven to a service floor while preventing the middle floor from stopping due to the operation of a governor when a passenger intentionally shakes the car.

[0005]

In order to achieve the above object, the present invention is to install a speed detector on a rope connected to a car and to control the car speed output from the speed detector in a control microcomputer. Taken into a certain speed command generation circuit, the speed command generation circuit is equipped with a judging device for judging the speed detection value detected from the speed detector and a predetermined value, and a traveling pattern switching circuit for switching the judgment result to an emergency traveling pattern. ,
As a result, the speed command and the emergency speed command are processed.

[0006]

When the elevator is traveling, the speed is detected by the speed detector in contact with the rope connected to the car, and the speed is given to the speed command generating circuit in the control microcomputer. The speed command generation circuit is equipped with a discriminator that determines the speed detection value detected by the speed detector and the predetermined value.If the predetermined value data is larger than the speed detection value data, the current speed command is used for speed control. It is given to the circuit and the elevator runs normally. If the data of the speed detection value is larger than the data of the predetermined value in the judgment device, switch to the emergency speed command and give it to the speed control circuit, reduce the elevator rated speed to the low speed, and control the operation to the service floor. And acts to prevent governor movement.

[0007]

The present invention will be described in detail below. FIG.
Shows a block diagram of an elevator according to the invention. Figure 2
The characteristic diagram of a speed command pattern and a car speed pattern is shown. FIG. 3 shows a speed command switching circuit diagram. Figure 4, Figure 5,
FIG. 6 shows a block diagram of an elevator according to another embodiment.
1, 1 is a control device, 2 is an electric motor, 3 is a sheave, 4 is a main rope, 5 is a car, 6 is a weight, 7 is a governor device, 7-1 is a governor switch, 8 is a governor rope, and 9 is a speed. Signal detector, 10 speed detector, 11 rope, 12 speed command generating circuit, 13 adder, 14 speed control circuit, 15 vector control circuit, 16 PWM
Control circuit, 17 is a control microcomputer, 18 is a speed detection value, 1
Reference numeral 9 is a predetermined value, 20 is a determiner, 23 is a traveling pattern switching circuit, 24 is a speed command, and 25 is an emergency speed command. For speed control of the elevator, a speed command is generated from the speed command generation circuit 12 in the control microcomputer 17, and the speed command is taken into the speed control circuit 14 through the adder 13. On the other hand, the speed of the electric motor 2 is detected by the speed signal detector 9, is input to the adder 13, the deviation signal of both is given to the speed control circuit 14, and the torque command calculated by the speed control circuit 14 is applied to the vector control circuit 1.
5, the current command and the frequency command are fetched from the vector control circuit 15 to the PWM control circuit 16, the base signal of the transistor is given from the PWM control circuit 16 to the inverter circuit of the control device 1, and the variable voltage is changed by the inverter circuit of the control device 1. And, a sine wave of variable frequency is applied to the electric motor 2, the electric motor 2 is driven, the sheave 3 directly connected to the electric motor 2 is rotated, and the car 5 and the weight 6 installed on the main rope 4 are moved up and down.

When the passenger vibrates the car during traveling in the elevator, a resonance phenomenon occurs when the frequency of the vibration of the passenger and the natural vibration frequency of the rope system match, and the car vibrates greatly in the vertical direction. Then, this vibration speed is transmitted to the governor device 7 by the governor rope 8 and the governor switch 7-1 operates to stop the running elevator.
There is a problem of trapping passengers in the car 5.

The present invention provides an elevator control device in which the governor device 7 does not operate due to this vibration. As shown in FIG. 1, the vibration speed of the car 5, which resonates with the vibration frequency of the passenger and the vibration frequency having the rope system, is transmitted to the rope 11 coupled to the car 5, and the speed detector 10 Detect the vibration speed. Speed detector 10
The output signal (speed signal) of is taken into the speed command generation circuit 12 in the control microcomputer 17, the speed command is changed when the speed detection value 18 is a predetermined value 19, and the elevator speed travels at a low speed. The operation of the governor device 7 is prevented, and the car 5 is operation-controlled to the service floor and stopped.

2 (a) and 2 (b) show the speed command according to the conventional method and the car speed traveling pattern characteristic according to the present invention. According to the conventional method, the speed command generating circuit 12 is used as shown in FIG.
When the speed command pattern of (a) is created and the car speed increases as shown in FIG. 2 (b), if the passenger shakes the car 5 while traveling, the car speed fluctuates, and the car speed changes. When the governor operating speed is reached and the governor switch 7-1 in the governor device 7 operates, the speed command disappears and the elevator stops regardless of the service floor. To solve this problem, an emergency speed command was added.

FIG. 3 shows a speed command switching circuit diagram. As an example, when the elevator is traveling in the UP direction, the speed detection value 18 fetched from the speed detector 10 is input into the microcomputer. Next, the speed detection value 18 fetched by the judging device 20 is compared with the predetermined value 19 set between the rated elevator speed and the governor operating speed, and if the speed detection value 18 is small, the contacts in the emergency traveling pattern switching circuit 23 are compared. 21 is turned on and a regular speed command 24 is generated. If the detected speed value 18 is larger than the predetermined value 19, the contact 21 in the traveling pattern switching circuit 23 is turned off, the contact 22 is turned on, and the emergency speed command 25 is switched to, so that the elevator speed is reached before the governor operating speed is reached. To slow down and prevent governor movement. 2 (c) and 2 (d) show speed command patterns and car speed pattern characteristics according to the present invention. Figure 2
From (c), the speed command pattern becomes a speed command pattern that is converted into a speed command lower than the rated speed by switching to the emergency speed command 25 when the detected speed value 18 becomes larger than a predetermined value. The car speed in FIG. 2 (d) becomes the car speed shown in the figure by the speed command pattern in FIG. 2 (c), and the car speed is kept below the governor operation speed to run to the service floor without stopping the elevator.

FIG. 4 is a block diagram of an elevator system (hydraulic elevator) showing a second embodiment. In FIG. 4, 26 is a hydraulic pump, 27 is a tank, 28 is a solenoid valve, 2
Reference numeral 9 is a hydraulic cylinder, 30 is a hydraulic plunger, and 31 is a pulley. Speed command generation circuit 12 in control microcomputer 17
The normal speed command 24 is given to the adder 13. On the other hand, the speed of the electric motor 2 is detected by the speed signal detector 9, and the adder 13
To the speed control circuit 14,
The torque command calculated from the speed control circuit 14 is taken into the vector control circuit 15, the base current for operating the transistor of the control device 1 is given from the vector control circuit 15, and the sine wave of the variable voltage and the variable frequency is supplied from the control device 1 to the electric motor 2 To drive the electric motor 2 to control the rotation speed of the hydraulic pump 26 directly connected to the electric motor 2 to send or discharge the oil in the tank 27 to the hydraulic cylinder 29 to discharge the hydraulic plunger 3
0 is pushed up or pushed down, and the pulley 31 installed on the hydraulic plunger 30 and the main rope 4 hung on the pulley 31
The car 5 installed at the end moves up and down. When a passenger vibrates the car, the vibration speed of the car resonates depending on the vibration frequency and the vibration frequency of the rope system.
It is transmitted to the rope 11 coupled to and the vibration velocity is detected by the velocity detector 10. The output signal (speed signal) of the speed detector 10 is taken into the speed command generating circuit 12, and the speed command generating circuit 12 is provided with a judging device 20 for judging the speed detected value 18 detected from the speed detector 10 and the predetermined value 19. When the data of the predetermined value is larger than the data of the speed detection value 18, the normal speed command 24 is given to the speed control circuit 14 to make the elevator run steadily. Further, when the data of the speed detection value 18 is larger than the data of the predetermined value 19 in the judging device 20, it is switched to the emergency speed command 25 and given to the speed control circuit 14 to decelerate from the elevator rated speed to the low speed. Operation is controlled up to the service floor and stopped.

FIG. 5 is a block diagram of an elevator apparatus showing a third embodiment. In FIG. 5, 32 is a flow rate control valve, 33 is a pulse width modulation rate circuit, and 34 is a modulation rate changing circuit. The regular speed command 24 of the speed command generation circuit 12 in the control microcomputer 17 is given to the pulse width modulation rate circuit 33,
The pulse width is arbitrarily changed by pulse width modulation control, and a pulse signal is sent to the flow control valve 32. Flow control valve 32
Then, there are roughly divided a pilot valve and a main valve, and when a pulse signal comes, the pilot valve repeatedly turns on and off, oil flows into the main valve, and the flow rate of oil is controlled.
The rotation of the electric motor 2 causes the hydraulic pump 26 to suck in oil and feed it to the hydraulic cylinder 29 through the flow rate control valve 32, pushing up the hydraulic plunger 30 and moving up and down the car 5 installed on the main rope 4. When a passenger vibrates a car, the rope 1 that couples to the car 5 the vibration speed of the car that resonates with the vibration frequency and the vibration frequency of the rope system
1, the vibration velocity is detected by the velocity detector 10. The output signal (speed signal) of the speed detector 10 is taken into the speed command generating circuit 12, and the speed command generating circuit 12 is provided with a judging device 20 for judging the speed detected value 18 detected from the speed detector 10 and the predetermined value 19. When the data of the predetermined value 19 is smaller than the data of the speed detection value 18, the regular speed command 24 is given to the pulse width modulation rate circuit 33, and the elevator is steadily run. Further, when the data of the speed detection value 18 is larger than the data of the predetermined value 19 in the determiner 20, the emergency speed command 25 is switched to the pulse width modulation rate circuit 33 to reduce the elevator rated speed to the low speed. Then, control the operation to the service floor and stop. FIG. 6 shows a block diagram of an elevator apparatus showing a fourth embodiment. In FIG. 6, the speed detector 10 is installed in the governor device 7, and the governor pulley speed is taken into the speed command generation circuit 12. The speed command generation circuit 12 is provided with a determiner 20 for determining the speed detection value 18 detected from the speed detector 10 and the predetermined value 19, and when the data of the predetermined value 19 is larger than the data of the speed detection value 18, A regular speed command 24 is given to the speed control circuit 14 to run the elevator steadily. Further, when the data of the speed detection value 18 is larger than the data of the predetermined value 19 in the judging device 20, it is switched to the emergency speed command 25 and given to the speed control circuit 14 to decelerate from the elevator rated speed to the low speed. Operation is controlled up to the service floor and stopped.

[0014]

According to the present invention, the operation of the governor device is prevented by adding a simple circuit for detecting the vibration speed of the car and returning it to the speed command generating circuit, and the passenger is locked in the car. A good elevator can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram of an elevator apparatus according to an embodiment of the present invention.

FIG. 2 is a characteristic diagram of a speed command pattern and a car speed traveling pattern.

FIG. 3 is a speed command switching circuit diagram.

FIG. 4 is a block diagram of an elevator apparatus showing a second embodiment of the present invention.

FIG. 5 is a block diagram of an elevator apparatus showing a third embodiment of the present invention.

FIG. 6 is a block diagram of an elevator apparatus showing a fourth embodiment of the present invention.

[Explanation of symbols]

1 ... Control device, 2 ... Electric motor, 3 ... Sheave, 4 ... Main rope, 5 ... Car, 6 ... Weight, 7 ... Governor device, 7
-1 ... governor switch, 8 ... governor rope, 9 ... speed signal detector, 10 ... speed detector, 11 ... rope, 12 ... speed command generation circuit, 13 ... adder, 14 ... speed control circuit,
15 ... Vector control circuit, 16 ... PWM control circuit, 17
... control microcomputer, 18 ... speed detection value, 19 ... predetermined value, 2
0 ... Judgment device, 21 ... Contact a, 22 ... Contact b, 23 ... Travel pattern switching circuit, 24 ... Speed command, 25 ... Emergency speed command, 26 ... Hydraulic pump, 27 ... Tank, 28 ... Solenoid valve, 29 ... Hydraulic cylinder, 30 ... Hydraulic plunger, 31
... Pulley, 32 ... Flow control valve, 33 ... Pulse width modulation rate circuit, 34 ... Modulation rate changing circuit.

Front page continued (72) Inventor Toshiaki Kurosawa 1-6 Kandanishikicho, Chiyoda-ku, Tokyo Within Hitachi Building System Services Co., Ltd. (72) Keiichi Senda 1-6-6 Kandanishiki-cho, Chiyoda-ku, Tokyo Hitachi Ltd. Building system service (72) Inventor Hiromi Inaba 7-1-1 Omika-cho, Hitachi City, Ibaraki Hitachi Ltd. Hitachi Research Laboratory (72) Inventor Hideaki Takahashi 1070 Ichige, Katsuta, Ibaraki Hitachi Ltd. Mito Factory (72) Inventor Eiichi Sasaki 1070 Ma, Katsuta City, Ibaraki Prefecture Hitachi Ltd. Mito Factory

Claims (5)

[Claims] 1. A motor and a sheave driven by the motor,
A main rope wound around the sheave, a car and a weight suspended on the main rope, a governor rope connected to the car, a cabana device for detecting an elevator overspeed around which the cabana rope is wound, and the electric motor. In an elevator including a control device for controlling, a speed command generating circuit for giving a speed command to the control device, a speed detector for detecting the speed of the car, a detected speed is a rated value or more and a predetermined value less than a governor operating speed. An elevator control device comprising: a judging device for judging that there is a certain condition; and a traveling pattern switching circuit for changing to an emergency speed command and stopping at a service floor when the detected speed reaches a predetermined value. 2. A hydraulic cylinder that raises and lowers a car through a hydraulic plunger, a hydraulic pump that supplies and discharges pressure oil from an oil tank to the hydraulic cylinder when the car is raised and lowered, and between the hydraulic pump and the hydraulic cylinder. An electromagnetic switching valve installed in the vehicle, an electric motor for driving the hydraulic pump, a control device for controlling the electric motor, a governor rope connected to the car, and a governor device for detecting an overspeed of an elevator around which the governor rope is wound. In an elevator including, a speed detector that detects the speed of the car, a determiner that determines that the detected speed is a predetermined value that is greater than or equal to the rated speed and less than the governor operating speed, when the detected speed reaches a predetermined value. , An elevator control device including a traveling pattern switching circuit for changing to an emergency speed command and stopping at the service floor. . 3. A hydraulic cylinder for raising and lowering a car via a hydraulic plunger, a hydraulic pump for supplying and discharging pressure oil from an oil tank to the hydraulic cylinder when the car is raised and lowered, the hydraulic pump and the hydraulic cylinder. A flow rate control valve for controlling the oil flow rate, a pulse width modulation rate circuit for controlling the flow rate control valve, a speed command generation circuit for giving a speed command to the pulse width modulation rate circuit, and a speed during acceleration / deceleration. Modulation rate changing circuit for detecting and calculating the car speed to correct the control, electric motor for driving the hydraulic pump,
In an elevator including a governor rope coupled to the car and a governor device that detects an overspeed of the elevator around which the governor rope is wound, a speed detector that detects the speed of the car, and the detected speed is equal to or higher than a rated speed. It is characterized by including a judging device for judging a predetermined value less than the governor operating speed, and a traveling pattern switching circuit for changing to an emergency speed command and stopping at the service floor when the detected speed reaches a predetermined value. Elevator control device. 4. The elevator controller according to claim 3, wherein the speed detector detects the speed of the car by using an encoder. 5. The elevator control device according to claim 3, wherein the speed detector detects a governor pulley speed of the governor device by using an encoder.