WO2007108069A1 - Elevator device - Google Patents

Abstract

In an elevator device, a brake device stops traveling of an elevator car. The brake device has a brake control section and a timer circuit. The brake control section regulates deceleration of the car by controlling braking force produced in emergency braking. When a predetermined time has passed after the occurrence of an emergency brake command, the timer circuit cancels control of the braking force applied by the brake control section.

Description

 Specification

 Elevator equipment

 Technical field

 [0001] The present invention relates to an elevator apparatus capable of adjusting a deceleration of a force during emergency braking.

 Background art

 [0002] In a conventional elevator braking device, during emergency braking, the braking force of the electromagnetic brake is controlled based on the deceleration command value and the speed signal so that the deceleration of the force becomes a predetermined value (for example, (See Patent Document 1).

 Patent Document 1: Japanese Patent Laid-Open No. 7-157211

 Disclosure of the invention

 Problems to be solved by the invention

[0004] However, in the conventional braking device and braking control device as described above, both the basic emergency braking operation and the braking force control are performed by a single braking force control unit. If the force deceleration becomes too low due to a failure of the control unit, etc., the control distance will be too long.

[0005] The present invention has been made to solve the above-described problems, and can more reliably stop a car even when a brake control unit fails, while suppressing deceleration during emergency braking. An object of the present invention is to obtain an elevator apparatus that can perform the above.

 Means for solving the problem

[0006] An elevator apparatus according to the present invention includes a car and a brake device that stops the traveling of the car, and the brake device adjusts the deceleration of the car by controlling the braking force generated during emergency braking. And a timer circuit that invalidates the control of the braking force by the brake control unit when a predetermined time has elapsed for the generation force of the emergency braking command. Brief Description of Drawings

FIG. 1 is a configuration diagram showing an elevator apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a configuration diagram showing an elevator apparatus according to Embodiment 2 of the present invention. FIG. 3 is a configuration diagram showing an elevator apparatus according to Embodiment 3 of the present invention.

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

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

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

 FIG. 7 is a configuration diagram showing an elevator apparatus according to Embodiment 7 of the present invention.

 FIG. 8 is a configuration diagram showing an elevator apparatus according to Embodiment 8 of the present invention.

 FIG. 9 is a configuration diagram showing an elevator apparatus according to Embodiment 9 of the present invention.

 FIG. 10 is a configuration diagram showing an elevator apparatus according to Embodiment 10 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 car 1 and the counterweight 2 are suspended in the hoistway by the main rope 3 and are raised and lowered in the hoistway by the driving force of the lifting machine 4.

 [0009] The hoisting machine 4 includes a driving sheave 5 around which the main rope 3 is wound, a motor 6 that rotates the driving sheave 5, and a brake rotating body that rotates integrally with the driving sheave 5 as the car 1 travels. The brake drum 7 and the brake sheave body 9 that brakes the rotation of the drive sheave 5 are provided. The drive of the motor 6 is controlled by a drive control unit 10 as an operation control unit.

 [0010] The brake body 9 includes a brake shoe 15 that contacts and separates from the brake drum 7, an armature 16 mounted on the first brake clutch 15, a brake spring 17 that presses the brake shoe 15 against the brake drum 7, And a brake coil 18 that is disposed to face the armature 16 and generates an electromagnetic force that separates the brake shoe 15 from the brake drum 7 against the brake spring 17.

A brake switch 22 and a timer switch 28 are connected in series between the brake coil 18 and the power source 19. By opening at least one of the switches 22, 28, the power supply to the brake coil 18 is cut off, and the brake shoe 15 is pressed against the brake drum 7 by the brake spring 17. Tymouth Switch 28 is normally closed. Therefore, normally, the brake coil 22 is closed when the brake switch 22 is closed. Electric power is supplied to the brake drum 15, and the brake shoe 15 is released from the brake drum 7.

[0012] ONZOFF of the brake switch 22 is controlled by the brake control unit 23. The brake control unit 23 includes a microcomputer having an arithmetic processing unit (CPU), a storage unit (ROM, RAM, etc.) and a signal input / output unit.

[0013] When a brake operation command (including a normal braking command and an emergency braking command) is generated, the brake control unit 23 opens the brake switch 22 and cuts off power to the brake coil 18 to The main unit 9 is braked. When the brake operation command is released, that is, when the brake release command is generated, the brake control unit 23 closes the brake switch 22 and releases the braking force of the brake unit body 9. The brake operation command and the brake release command are generated by an elevator control unit including the drive control unit 10 and input to the brake control unit 23.

 [0014] In addition, when a brake operation command, that is, an emergency braking command is generated while the car 1 is traveling, the brake control unit 23 estimates the deceleration (the absolute value of the negative acceleration) of the force 1 Based on the deceleration rate estimation information, the deceleration of the car 1 is estimated, and the electromagnetic force generated in the brake coil 18 (the open / close state of the brake switch 22) is applied so that the deceleration does not become excessive or excessive. Control. As a result, the brake control unit 23 controls the pressing force of the brake shoe 15 against the brake drum 7.

 [0015] As the deceleration estimation information, the hoisting machine rotation detector that detects the rotation of the motor 6, the car position detector provided in the governor, and the rotation of the return wheel on which the main rope 3 is wound are detected. Use a return wheel rotation detector, a scale device that detects the load in the force 1, a speedometer or accelerometer mounted in the car 1, or a shaft torque meter that detects the shaft torque of the drive sheave 5. I can do it. An encoder or resolver can be used as the rotation detector and car position detector.

[0016] As the brake switch 22, a switch capable of adjusting the amount of current supplied to the brake coil 18, such as an openable switch that can be switched or a slide switch that continuously changes the resistance value, is used. Hereinafter, in the present embodiment, when using the open / close switch, a force slide switch is used to change the resistance value by sliding the switch instead of turning the switch ONZOFF. The timer switch 28 is opened in response to an opening command from the timer circuit 29. When a brake operation command is generated, the timer circuit 29 starts measuring time (counting down), and also outputs the brake operation command to the timer switch 28 after a predetermined time. Therefore, the braking force control of the brake unit body 9 by the brake control unit 23 is invalidated after a predetermined time from the occurrence of the emergency braking command.

 [0018] When the brake operation command is canceled, the time measurement by the timer circuit 29 is reset, and the timer switch 28 is closed. The brake device of the first embodiment includes a brake unit main body 9, a brake switch 22, a brake control unit 23, a timer switch 28, and a timer circuit 29.

 In such an elevator apparatus, since the braking force control by the brake control unit 23 is invalidated after a predetermined time from the occurrence of the emergency braking command, the brake control unit 23 suppresses deceleration during emergency braking. The car 1 can be stopped more reliably even in the event of 23 failures.

 [0020] Embodiment 2.

 Next, FIG. 2 is a block diagram showing an elevator apparatus according to Embodiment 2 of the present invention. In the figure, a current limiter 27 and a switching switch 27a are connected between a brake coil 18 and a power source 19. The current limiter 27 limits the current flowing through the brake coil 18. As the current limiter 27, for example, a resistor is used. The switching switch 27a switches whether the current of the power source 19 is limited by the current limiter 27 and supplied to the brake coil 18 or supplied to the brake coil 18 without passing through the current limiter 27.

 [0021] Specifically, the switching switch 27a is normally switched to the circuit side that does not pass the current limiter 27. On the other hand, when a brake operation command is generated, the switching switch 27a is switched to the circuit side through which the current limiter 27 is passed. When the brake operation command is released, the switching switch 27a is returned to the circuit side that does not pass the current limiter 27. Other configurations and operations are the same as those in the first embodiment.

[0022] In such an elevator apparatus, by using the current limiter 27, an upper limit of the energization amount to the brake coil 18 that can be controlled by the brake control unit 23 is set, and only a part of the power supply voltage is set in the brake coil 18. No longer applied. Therefore, the amount of control of the brake unit body 9 by the brake control unit 23 can be appropriately limited. [0023] Embodiment 3.

 Next, FIG. 3 is a block diagram showing an elevator apparatus according to Embodiment 3 of the present invention. In the figure, a forced braking switch 26 is provided between the brake coil 18 and the power source 19. The forced braking switch 26 is connected in series to the brake switch 22 and is normally closed. By opening the forced braking switch 26, the brake control unit 23 is forced to perform braking operation regardless of the command of the brake control unit 23. That is, the forced braking switch 26 invalidates the control of the braking force by the brake control unit 23 according to the signal from the outside, and forcibly causes the braking unit body 9 to generate the total braking force. Other configurations and operations are the same as those in the second embodiment.

 [0024] In such an elevator apparatus, since the forced braking switch 26 is provided between the brake coil 18 and the power source 19, the control by the brake control unit 23 is invalidated as necessary, and the brake unit body 9 Can be immediately braked.

 [0025] Embodiment 4.

 Next, FIG. 4 is a block diagram showing an elevator apparatus according to Embodiment 4 of the present invention. In the figure, the brake switch 22 is not controlled by the brake control unit 23, and is directly opened and closed according to the presence / absence of a brake operation command (brake release command). An adjustment switch 22a, a current limiter 27, and a timer switch 28 are connected between the power source 19 and the brake coil 18 in parallel with the brake switch 22.

 In this example, a normal opening / closing switch is used as the brake switch 22. Further, as the adjustment switch 22a, a switch capable of adjusting the amount of current supplied to the brake coil 18, such as a switchable switch that can be switched or a slide switch that continuously changes the resistance value, is used. Normally, the adjustment switch 22a is open and the timer switch 28 is closed. Hereinafter, in this embodiment, the case where an open / close type switch is used will be described. However, when a slide type switch is used, the resistance value is changed by sliding the switch instead of turning the switch ON / OFF. .

[0027] ON / OFF of the adjustment switch 22a is controlled by the brake control unit 23. Specifically, the brake control unit 23 monitors the deceleration of the car 1 during traveling regardless of whether or not a brake operation command is issued, and the brake coil 1 8 controls the electromagnetic force generated in 8, that is, the open / close state of the adjustment switch 22a. In addition, the timer switch 28 is released after a predetermined time of the generation force of the brake operation command. The brake control unit 23 detects and monitors the deceleration of the car 1 independently of the drive control unit 10. Other configurations and operations are the same as those in the first embodiment.

 [0028] In such an elevator apparatus, the adjustment switch 22a for adjusting the braking force is arranged in a circuit parallel to the brake switch 22, and the brake switch 22 is immediately opened according to the brake operation command. As a result, when the brake operation command is generated, the brake body 9 can be immediately braked without any operation delay.

 In addition, since the brake control unit 23 detects and monitors the deceleration of the car 1 independently of the drive control unit 10, the reliability can be improved.

 [0029] Embodiment 5.

 Next, FIG. 5 is a block diagram showing an elevator apparatus according to Embodiment 5 of the present invention. In the figure, the brake operation command is also input to the brake control unit 23. When a brake operation command is input, the brake control unit 23 monitors the deceleration during the travel of the force 1 and generates it in the brake coil 18 so that the deceleration does not become too large or too small. The electromagnetic force, that is, the open / close state of the adjustment switch 22a is controlled. Other configurations are the same as those in the fourth embodiment.

 [0030] In this way, the brake control unit 23 may control the deceleration of the car 1 only when a brake operation command is generated.

 [0031] Embodiment 6.

 Next, FIG. 6 is a block diagram showing an elevator apparatus according to Embodiment 6 of the present invention. In the figure, a forced braking switch 26 is provided between the brake coil 18 and the power source 19. The forced braking switch 26 is normally closed. By opening the forced brake switch 26, the brake unit body 9 is forced to perform a braking operation regardless of the command from the brake control unit 23 and the open / close state of the brake switch 22. Other configurations and operations are the same as those in the fourth embodiment.

[0032] In such an elevator apparatus, since the forced braking switch 26 is provided between the brake coil 18 and the power source 19, the control by the brake control unit 23 can be invalidated as necessary. Can do.

 [0033] Note that the brake operation command may be input to the brake control unit 23 so that the brake control unit 23 controls the deceleration of the car 1 only when the brake operation command is generated.

 [0034] Embodiment 7.

 Next, FIG. 7 is a block diagram showing an elevator apparatus according to Embodiment 7 of the present invention. In the figure, the hoisting machine 4 has a drive sheave 5, a motor 6, a brake drum 7, and first and second brake part bodies 8 and 9 that brake the rotation of the drive sheave 5.

 The first brake section body 8 includes a first brake shoe 11 that is brought into contact with and separated from the brake drum 7, a first armature 12 mounted on the first brake shoe 11, and a first brake shoe 11 is pressed against the brake drum 7 and the first brake spring 13 is disposed opposite to the first armature 12 and the first brake shoe 11 is separated from the brake drum 7 against the first brake spring 13. The first brake coil 14 that generates the electromagnetic force is generated.

 [0036] The second brake part main body 9 corresponds to the brake part main body 9 of the second embodiment, and includes a second brake 15, a second armature 16, a second brake spring 17, and a second brake spring 9. The brake coin 18 is available.

 [0037] Between the first brake coil 14 and the power source 19, a first brake switch 20 is provided. The first brake switch 20 is directly opened and closed according to the presence or absence of a brake operation command. When the brake operation command is generated, the first brake switch 20 is opened, the power supply to the first brake coil 14 is cut off, and the first brake shoe 11 is moved by the first brake spring 13 to the brake drum. Pressed against 7. When the brake release command is issued, the first brake switch 20 is closed and the braking force of the first brake section body 8 is released.

 [0038] The second brake switch 22 corresponds to the brake switch 22 of the second embodiment. That is, ONZOFF of the second brake switch 22 is controlled by the brake control unit 23. The first brake part body 8 has a braking force that can stop the car 1 even when the braking force by the second brake part body 9 is released.

[0039] The brake device of the seventh embodiment includes first and second brake body bodies 8, 9, first and second brake switches 20, 22, a brake control unit 23, a current limiter 27, and a switch 27a. The timer switch 28 and the timer circuit 29 are provided. Other configurations and operations are the same as those in the second embodiment.

 In such an elevator apparatus, when a brake operation command is generated, the first brake unit body 8 immediately performs a braking operation regardless of the control state of the second brake unit body 9. For this reason, it is possible to more reliably prevent a delay in starting the braking operation.

 [0041] In the seventh embodiment, the second brake unit body 9 first performs a braking operation when a brake operation command is generated, and reduces the braking force when the deceleration of the force 1 is excessive. Even if a brake operation command is generated, the second brake switch 22 is kept closed, and when the deceleration of the car 1 is not more than a predetermined value, the second brake switch 22 is opened to perform a braking operation. It may be.

 [0042] Embodiment 8.

 Next, FIG. 8 is a block diagram showing an elevator apparatus according to Embodiment 8 of the present invention. In the figure, a forced braking switch 26 is provided between the second brake coil 18 and the power source 19. The forced braking switch 26 is normally closed. By opening the forced braking switch 26, the second brake unit body 9 is forcibly braked regardless of a command from the brake control unit 23. Other configurations and operations are the same as those in the seventh embodiment.

 [0043] In such an elevator apparatus, since the forced braking switch 26 is provided between the brake coil 18 and the power source 19, control by the second brake control unit 23 can be invalidated as necessary. Monkey.

 [0044] Embodiment 9.

 Next, FIG. 9 is a block diagram showing an elevator apparatus according to Embodiment 9 of the present invention. In the figure, the hoisting machine 4 has a drive sheave 5, a motor 6, a brake drum 7, and first and second brake part bodies 8 and 9 that brake the rotation of the drive sheave 5.

[0045] The first brake section main body 8 has a first brake shoe 11, a first armature 12, a brake spring 13, and a first brake coil 14, as in the seventh and eighth embodiments. ing. The second brake part main body 9 corresponds to the brake part main body 9 of the fourth embodiment, and the second brake shoe 15, the second armature 16, the second brake spring 17, and the second brake coil 1 Has 8.

 A first brake switch 20 is provided between the first brake coil 14 and the power source 19. The first brake switch 20 is opened and closed directly according to the brake operation command.

[0047] The second brake switch 22 corresponds to the brake switch 22 of the fourth embodiment. That is, the second brake switch 22 is not controlled by the brake control unit 23, and is directly opened and closed according to the brake operation command. Between the power source 19 and the brake coil 18, an adjustment switch 22a, a current limiter 27, and a timer switch 28 are connected in parallel with the second brake switch 22.

 [0048] ONZOFF of the adjustment switch 22a is controlled by the brake control unit 23. Specifically, the brake control unit 23 monitors the deceleration of the car 1 while traveling regardless of the presence or absence of a brake operation command, and prevents the brake coil 1 8 from being excessively high or low. In other words, the electromagnetic force generated in the control, that is, the open / close state of the adjustment switch 22a is controlled. In addition, the timer switch 28 is also released after a predetermined time for generating the brake operation command.

 [0049] The brake device of the ninth embodiment includes first and second brake body bodies 8, 9, first and second brake switches 20, 22, adjustment switch 22a, brake control unit 23, current limiter 27, It has a timer switch 28 and a timer circuit 29. Other configurations and operations are the same as those in Embodiments 4 and 7.

 In such an elevator apparatus, when a brake operation command is generated, the first brake unit body 8 immediately performs a braking operation regardless of the control state of the second brake unit body 9. For this reason, it is possible to more reliably prevent a delay in starting the braking operation.

 [0051] Further, an adjustment switch 22a for adjusting the braking force is arranged in a circuit parallel to the second brake switch 22, and the second brake switch 22 is directly opened and closed according to a brake operation command. Thus, when the brake operation command is generated, the second brake unit body 9 can be immediately braked without any operation delay.

 [0052] Note that a brake operation command may be input to the brake control unit 23 so that the brake control unit 23 controls the deceleration of the car 1 only when the brake operation command is generated.

[0053] Embodiment 10. Next, FIG. 10 is a block diagram showing an elevator apparatus according to Embodiment 10 of the present invention. In the figure, a forced braking switch 26 is provided between the second brake coil 18 and the power source 19. The forced braking switch 26 is normally closed. By opening the forced braking switch 26, the second brake unit main body 9 is forcibly braked regardless of a command from the brake control unit 23. Other configurations and operations are the same as those in the ninth embodiment.

 [0054] In such an elevator apparatus, since the forced braking switch 26 is provided between the brake coil 18 and the power source 19, the control by the second brake control unit 23 can be invalidated as necessary. Monkey.

 In the tenth embodiment, a brake operation command may be input to the brake control unit 23 so that the brake control unit 23 controls the deceleration of the car 1 only when the brake operation command is generated.

 In the above example, the brake control unit 23 may be configured by an electric circuit that processes a force analog signal configured by a computer.

 Furthermore, in the above example, the brake device is provided in the lifting machine 4, but it may be provided in another position. That is, the brake device may be, for example, a car brake mounted on a car or a rope brake that holds the main rope and brakes the car.

 Furthermore, the brake rotating body is not limited to the brake drum, but may be a brake disc, for example. Three or more brake body parts may be provided for one brake rotating body. Furthermore, in the above example, the brake device may be arranged inside the force brake rotator with the brake device arranged outside the brake rotator! /.

 Furthermore, the brake rotator may be integral with the drive sheave.

Claims

The scope of the claims  [1] Basket and  Brake device for stopping the above car  With  The brake device is  A brake control unit that adjusts the deceleration of the force by controlling the braking force generated during emergency braking;  Emergency braking command generation force A timer circuit that disables braking force control by the brake control unit after a predetermined time  Have an elevator device!  [2] The brake device is  A brake shoe that is brought into and out of contact with a brake rotator that rotates as the car travels, a brake spring that presses the brake shoe against the brake rotator, and a brake spring that is piled on the brake spring and that serves as the brake rotator Brake coil that generates electromagnetic force  Have  The brake control unit controls the electromagnetic force generated in the brake coil during emergency braking,  2. The elevator apparatus according to claim 1, wherein the timer circuit cuts off power supply to the brake coil when a predetermined time has elapsed since the occurrence of an emergency braking command.  3. The elevator apparatus according to claim 2, wherein the brake apparatus further includes a current limiter for limiting a current flowing through the brake coil. [4] An operation control unit for controlling the operation of the car is further provided,  The elevator apparatus according to claim 1, wherein the brake control unit detects deceleration of the car independently of the operation control unit. [5] The brake device includes a forced brake switch for invalidating the control of the braking force by the brake control unit according to an external signal and forcibly generating the total braking force. V. The elevator apparatus according to claim 1.