WO2008068839A1 - Elevator apparatus - Google Patents

Abstract

In an elevator apparatus, up-and-down moving of a car is attained by multiple hoisting machines. Each of the hoisting machines is equipped with a brake unit. The brake units are individually controlled by respective brake control means. Each of the brake control means at emergency braking detects the state of rotation of corresponding hoisting machine and controls the braking force of corresponding brake unit in accordance with the state of rotation detected.

Description

 Specification

 Elevator equipment

 Technical field

 [0001] The present invention relates to an elevator apparatus that lifts and lowers one car by a plurality of hoisting machines.

 Background art

 In recent years, with an increase in the number of buildings, there is a demand for an elevator that can move more passengers faster. On the other hand, there is a way to increase the size of the force. For this purpose, a large lifting machine with large torque and high output is required, which increases the production cost and the lifting and installation cost. On the other hand, there has been proposed an elevator apparatus that raises and lowers one force with two hoisting machines without increasing the size of the hoisting machine (see, for example, Patent Document 1).

 [0003] Patent Document 1: Japanese Patent Publication No. 7-42063

 Disclosure of the invention

 Problems to be solved by the invention

[0004] In the conventional elevator apparatus as described above, how to stop the two hoisting machines during emergency braking is not taken into consideration, and the operation of the brake devices of the two hoisting machines is not considered. There was a risk that the timing would shift unintentionally or the deceleration of the force would be excessive.

[0005] The present invention has been made to solve the above-described problems, and provides an elevator apparatus capable of more appropriately decelerating and stopping a plurality of hoisting machines during emergency braking. With the goal.

 Means for solving the problem

[0006] An elevator apparatus according to the present invention includes a plurality of hoisting machines each having a brake device, a car that is lifted and lowered by the hoisting machine, and a plurality of brake control means for individually controlling the corresponding brake devices, Each brake control means detects the rotational state of the corresponding lifting machine during emergency braking, and controls the braking force of the corresponding brake device according to the detected rotational state. The elevator apparatus according to the present invention includes a plurality of hoisting machines each having a brake device, a car that is lifted / lowered by the hoisting machine, and a brake control unit that controls the brake device. Then, the rotation state of any one lifting machine is detected, and the braking force of the braking device of at least two lifting machines is controlled according to the detected rotation state.

The elevator apparatus according to the present invention includes a plurality of hoisting machines each having a brake device, a car that is lifted and lowered by the hoisting machine, and a brake control means for controlling the brake device, and the brake control means includes an emergency brake. Occasionally, the driving state of the force is detected, and the braking force of at least two hoisting machine braking devices is controlled according to the detected driving state.

The elevator apparatus according to the present invention also includes a plurality of hoisting machines each having a brake device, a car that is lifted and lowered by the hoisting machine, a brake control means that controls the brake device, and an emergency stop command that detects the occurrence of an emergency stop command. When the occurrence of an emergency stop command is detected, the emergency stop detection means disconnects the brake control means force of at least one lifting machine and immediately brakes the brake control means. During emergency control, the braking force of the braking device of the hoisting machine that is the controlled object is controlled so that the deceleration of at least one hoisting machine that is the controlled object becomes the predetermined deceleration.

Brief Description of Drawings

圆 1] A configuration diagram illustrating an elevator apparatus according to Embodiment 1 of the present invention.

 FIG. 2 is a graph showing the rotational speed, deceleration, energizing command to the electromagnetic coil, and time variation of the electromagnetic coil current during emergency braking of one of the hoisting machines in FIG.

圆 3] It is a block diagram showing an elevator apparatus according to Embodiment 2 of the present invention.

 [Fig. 4] Fig. 4 shows the temporal change of the rotational speed, the energizing command to the electromagnetic coil, and the current of the electromagnetic coil of one of the hoisting machines of the elevator apparatus according to Embodiment 3 of the present invention. It is a graph.

[5] FIG. 5 is a configuration diagram showing an elevator apparatus according to Embodiment 4 of the present invention.

6] FIG. 6 is a configuration diagram showing an elevator apparatus according to Embodiment 5 of the present invention.

7] A configuration diagram illustrating an elevator apparatus according to Embodiment 6 of the present invention. FIG. 8 is a configuration diagram showing an elevator apparatus according to Embodiment 7 of the present invention.

 BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

 Embodiment 1.

 FIG. 1 is a configuration diagram showing an elevator apparatus according to Embodiment 1 of the present invention. In the figure, the force 1 and the counterweight 2 are suspended in the hoistway by the suspension means 3 and are lifted and lowered by the driving force of the first and second lifting machines 4 and 5. The suspension means 3 includes 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 belt-like rope is used.

[0009] The first lifting machine 4 includes a first drive sheave 8, a first motor 9 that rotates the first drive sheave 8, and a first drive sheave 8 that is rotated together with the first drive sheave 8. And the first brake device 11 that brakes the rotation of the first brake wheel 10 and the first drive sheave 8.

 The first brake device 11 includes a first brake shoe that is brought into contact with and separated from the first brake wheel 10, and a first brake spring that presses the first brake shoe against the first brake wheel 10. And a first electromagnet that is piled on the first brake spring and separates the first brake shoe from the first brake wheel 10. The first electromagnet is provided with a first electromagnetic coil.

 The second hoisting machine 5 includes a second drive sheave 12, a second motor 13 that rotates the second drive sheave 12, and a second brake that rotates together with the second drive sheave 12. A second brake device 15 is provided for braking the rotation of the vehicle 14, the second brake vehicle 14, and the second drive sheave 12.

 The second brake device 15 includes a second brake shoe that is brought into contact with and separated from the second brake wheel 14, a second brake spring that presses the second brake shoe against the second brake wheel 14, and And a second electromagnet that is piled on the second brake spring and separates the second brake shoe from the second brake wheel 14. The second electromagnet is provided with a second electromagnetic coil.

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

 The first motor 9 is provided with a first speed detector 16. The signal of 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 deactivates the first electromagnetic coil of the first brake device 11 according to the signal from the first speed detector 16.

 The second motor 9 is provided with a second speed detector 18. The signal of 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 energizes / deactivates the second electromagnetic coil of the second brake device 15 according to the signal from the second speed detector 18.

 [0016] Fig. 2 shows the rotational speed, deceleration, energization command to the electromagnetic coil, and time variation of the electromagnetic coil current during emergency braking of one of the hoisting machines 4, 5 in Fig. 1. It is a graph.

 [0017] When a command for suddenly stopping the force 1 (emergency stop command) is generated, power to the motors 9 and 13 is cut off and the electromagnetic coils of the brake devices 11 and 15 are de-energized. At time T1, when the deceleration 0 exceeds a predetermined value (threshold value) Ί 0, the brake control means 17 and 19 turn on the energizing command to the electromagnetic coil. As a result, the braking force of the brake devices 11 and 15 is reduced, and the deceleration 0 is lowered.

 [0018] Thereafter, when the deceleration γ becomes lower than the predetermined value γ 0 at time T2, the brake control means 17 and 19 turn off the energizing command to the electromagnetic coil. As a result, the braking force of the brake devices 11 and 15 is increased, and the deceleration γ is increased.

 [0019] The first and second brake control means 17, 19 perform the ONZOFF operation of such an urging command independently of each other until time T3 when the first and second lifting machines 4, 5 stop. Execute. As a result, the first and second hoisting machines 4 and 5 are decelerated and stopped at a deceleration close to a predetermined deceleration γθ.

[0020] In such an elevator apparatus, the brake control means 17, 19 detect the rotation state of the corresponding lifting machines 4, 5 at the time of emergency braking, that is, the deceleration, and according to the detected deceleration, versus Since the braking force of the corresponding brake devices 11 and 15 is controlled, the hoisting machines 4 and 5 can be decelerated and stopped more appropriately during emergency braking.

 [0021] Embodiment 2.

 Next, FIG. 3 is a block diagram showing an elevator apparatus according to Embodiment 2 of the present invention. In the figure, an emergency stop detection means 20 is connected to the first and second brake control means 17 and 19. The emergency stop detection means 20 detects the occurrence of an emergency stop command and activates the braking force control by the first and second brake control means 17 and 19 synchronously. Other configurations are the same as those in the first embodiment.

 In such an elevator apparatus, the emergency stop detecting means 20 synchronizes the start of the braking force control operation by the first and second brake control means 17, 19. The difference in tension between the main ropes 6 and 7 can be reduced and damage to the main ropes 6 and 7 can be prevented.

 [0023] Embodiment 3.

 Next, a third embodiment of the present invention will be described. In the second embodiment, the deceleration of the lifting machines 4 and 5 is detected by the brake control means 17 and 19, but in the third embodiment, the rotational speed of the lifting machines 4 and 5 is detected. That is, the brake control means 17 and 19 generate a control target speed that decelerates at a predetermined deceleration with the rotation speed when the emergency stop command of the corresponding lifting machine 4 and 5 is generated as an initial value, and the corresponding lifting machine The braking force of the brake devices 11 and 15 of the corresponding lifting machines 4 and 5 is controlled so that the rotational speeds of the machines 4 and 5 follow the control target speed. Other configurations are the same as those in the second embodiment.

 [0024] FIG. 4 is a graph showing a temporal change in the rotational speed, the energizing command to the electromagnetic coil, and the current of the electromagnetic coil of one of the lifting machines 4 and 5 in FIG. In the figure, time T 1 is the time when the occurrence of an emergency stop command is detected, and the rotational speed of the hoisting machines 4 and 5 at this time is VO. The brake control means 17 and 19 execute the following calculation, assuming that the upper and lower limits of the control speed are VI, the predetermined deceleration is γ, and the elapsed time from time T1 is t.

 [0025] V2 (t) = (V0 + Vl)-y X t (1)

 V3 (t) = (VO— VI) — γ X t · · · (2)

Equation 1 above is the upper limit control target speed pattern, and Equation 2 is the lower limit control target speed pattern. [0026] The brake control means 17 and 19 compare the rotational speed V (t) of the hoisting machines 4 and 5 at that time with the control target speed pattern, and if V (t) ≤ V3 (t), Energize the electromagnetic coil. If V (t) ≥ V2 (t), the electromagnetic coil is deactivated. By controlling the brake devices 11 and 15 with such an algorithm, the lifting machines 4 and 5 are decelerated and stopped at a deceleration in the vicinity of a predetermined deceleration γ.

 [0027] In this way, the hoisting machines 4 and 5 can be more appropriately decelerated and stopped during emergency braking by controlling the braking force according to the rotational speed that is not the deceleration of the hoisting machines 4 and 5. be able to

[0028] Embodiment 4.

 Next, FIG. 5 is a block diagram showing an elevator apparatus according to Embodiment 4 of the present invention. In the figure, the brake devices 11 and 15 are controlled by a common brake control means 21. The brake control means 21 detects the deceleration of the second lifting machine 5 during emergency braking, and controls the braking force of the first and second brake devices 11 and 15 according to the detected deceleration. . The specific method for controlling the braking force is the same as in the first embodiment.

 [0029] In such an elevator apparatus, the brake control means 21 detects the deceleration of the second lifting machine 5 during emergency braking, and the braking of the brake apparatuses 11 and 15 according to the detected deceleration. Because the force is controlled, the hoisting machines 4 and 5 can be decelerated and stopped more appropriately during emergency braking. In addition, since one brake control means 21 is used for the first and second lifting machines 4, 5, the number of brake control means 21 and speed detectors 18 can be reduced, thereby reducing the cost. can do.

 In the fourth embodiment, the deceleration of the second lifting machine 5 is detected and the braking force of the brake devices 11 and 15 is controlled, but as shown in the third embodiment, the second The braking force of the brake devices 11 and 15 may be controlled according to the rotational speed of the lifting machine 5.

 [0031] Embodiment 5.

Next, FIG. 6 is a block diagram showing an elevator apparatus according to Embodiment 5 of the present invention. In the figure, the brake devices 11 and 15 are controlled by a common brake control means 22. The brake control means 22 detects the deceleration that is the running state of the car 1 during emergency braking, and controls the braking force of the first and second brake devices 11 and 15 according to the detected deceleration. To do. The specific method for controlling the braking force is the same as in the first embodiment.

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

 In such an elevator apparatus, the brake control means 21 detects the deceleration of the car 1 during emergency braking, and controls the braking force of the brake apparatuses 11 and 15 according to the detected deceleration. During emergency braking, the hoisting machines 4, 5 can be decelerated and stopped more appropriately.

 In the fifth embodiment, the deceleration of the car 1 is detected and the braking force of the brake devices 11 and 15 is controlled. The braking force may be controlled. In this case, the brake control means 22 generates a control target speed that decelerates at a predetermined deceleration with the traveling speed of the car 1 when the emergency stop command is generated as an initial value, and the traveling speed of the force 1 follows the control target speed. Thus, the braking force of the brake devices 11 and 15 is controlled.

 [0035] Embodiment 6.

 Next, FIG. 7 is a block diagram showing an elevator apparatus according to Embodiment 6 of the present invention. In the figure, the brake devices 11 and 15 are controlled by a common brake control means 21. Further, a brake control stop means (switch) 25 is provided between the brake control means 21 and the first brake device 11.

 An 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 an emergency stop command, activates the braking force control by the brake control means 19, and disconnects the first brake device 11 from the brake control means 21 and immediately starts the braking operation. Let 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 lifting machine 5 to be controlled becomes a predetermined deceleration during emergency braking. To do.

[0037] In such an elevator device, the brake device 11 of the lifting machine 4 is disconnected from the brake control means 21 and immediately braked during emergency braking, so the brake control means 21 Even when a failure occurs in the braking force control by the brake device 11, the car 1 can be more reliably stopped by the brake device 11. That is, in the sixth embodiment, as an appropriate deceleration stop method for the hoisting machines 4 and 5 at the time of emergency braking, there is a method for controlling the deceleration of the hoisting machine 5 while the hoisting machine 4 is immediately braked. Is selected. Therefore, by such a control method, the hoisting machines 4 and 5 can be more appropriately decelerated and stopped during emergency braking.

 [0038] Embodiment 7.

 Next, FIG. 8 is a block diagram showing an elevator apparatus according to Embodiment 7 of the present invention. The seventh embodiment is a combination of the fifth embodiment and the sixth embodiment. 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 11 is braked by the emergency stop detection means 26 during emergency braking. It was made to separate from 22.

 [0039] Also with such an elevator apparatus, the hoisting machines 4, 5 can be more appropriately decelerated and stopped during emergency braking.

 [0040] The brake control means can be configured by a circuit including a microcomputer, for example.

 In the above example, two hoisting machines are used, but three or more hoisting machines may be used. Furthermore, the occurrence of an emergency stop command may be detected by a signal from the elevator control device, or may be detected independently by a brake control means. For example, it may be determined that an emergency stop command has been issued by detecting the approach or contact of the brake shoe to the brake vehicle. It is also possible to determine that an emergency stop command has been issued if the current value of the electromagnetic coil of the brake device is less than the predetermined value even though the force speed is above the predetermined value!

 Furthermore, in the above example, the deceleration or speed is detected by the signal from the speed detector provided on the hoisting machine or speed governor, but the speed sensor of the force provided in the car or hoistway A signal may be used.

 The brake control means may perform both the brake control during normal operation and the brake control when an emergency stop command is generated, or only the brake control when an emergency stop command is generated. In the latter case, the brake control during normal operation is performed by the operation control means, and the brake control means independent of the operation control means force is used.

Claims

The scope of the claims  [1] Multiple hoisting machines, each having a braking device,  A car that is lifted and lowered by the lifting machine, and  A plurality of brake control means for individually controlling the corresponding brake devices;  Each of the brake control means detects the rotation state of the corresponding lifting machine during emergency braking, and controls the braking force of the corresponding brake device according to the detected rotation state.  2. The elevator apparatus according to claim 1, further comprising emergency stop detection means for detecting occurrence of an emergency stop command and synchronously starting the braking force control by the brake control means. [3] Each of the brake control means generates a control target speed that decelerates at a predetermined deceleration with the rotation speed when the emergency stop command of the corresponding lifting machine is generated as an initial value. 2. The elevator apparatus according to claim 1, wherein the braking force of the above-described braking device of the hoisting machine is controlled so that the rotational speed of the vehicle follows the control target speed. [4] multiple hoisting machines each having a brake device,  A car that is lifted and lowered by the lifting machine, and  Brake control means for controlling the brake device  With  The brake control means detects the rotational state of any one of the above-mentioned lifting machines during emergency braking, and according to the detected rotational state, the brake control means of at least two of the above-mentioned lifting machines An elevator device that controls braking force. [5] The brake control means generates a control target speed that decelerates at a predetermined deceleration with the rotation speed at the time of emergency stop command generation of the hoisting machine to be detected as an initial value, and is the control target The elevator apparatus according to claim 4, wherein the braking force of the brake device of the hoisting machine, which is a control target, is controlled so that the rotational speed of the hoisting machine follows the control target speed. [6] Multiple hoisting machines each having a brake device, A car that is lifted and lowered by the lifting machine, and  Brake control means for controlling the brake device  With  The brake control means detects an operating state of the force during emergency braking, and an elevator that controls the braking force of the braking devices of at least two hoisting machines according to the detected traveling state. apparatus. [7] The brake control means generates a control target speed that decelerates at a predetermined deceleration using the traveling speed of the force when the emergency stop command is generated as an initial value, and the traveling speed of the force is the control target speed. The elevator apparatus according to claim 6, wherein the braking force of the brake device of the hoisting machine to be controlled is controlled so as to follow the control. [8] Multiple hoisting machines each having a braking device,  A car that is lifted and lowered by the above-mentioned lifting machine,  Brake control means for controlling the brake device; and  Emergency stop detection means to detect occurrence of emergency stop command  With  When the emergency stop detection means detects the occurrence of an emergency stop command, the brake device of at least one upper machine is immediately braked by separating the brake control means force,  The brake control means is configured to control the braking device of the hoisting machine to be controlled so that the deceleration of at least one hoisting machine to be controlled becomes a predetermined deceleration during emergency braking. An elevator device that controls braking force.