JP2015168487A - Elevator device, and control device for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator device, which suppresses occurrence of sliding between a main cable and a sheave and provides stable braking force during a period from the start of deceleration until the stop of a car, when braking in an emergency, from the time of high speed travelling.SOLUTION: An elevator device 1 comprises: a hoisting machine 11 to be mounted with a main cable 4; a plurality of braking devices 14 and 15 that brake the hoisting machine; a governor 16 installed with a speed detecting device 21 that detects a speed of a car 3; and a control device 7 that controls the braking devices. The control device includes: an abnormality detecting device 23 that detects an abnormality of the elevator device; a motion control device 24 that instructs operation of the braking devices; and a table 25 memorizing a speed of the car to be operated by the braking devices and operation sequences of the braking devices. The motion control device corrects a motion-starting speed of the car that instructs the braking devices to start operation, according to an operation state of the car including a movement direction and acceleration.

Description

  The present invention relates to an elevator apparatus and a control apparatus therefor, and more particularly to an elevator apparatus suitable for controlling the same main rope with a plurality of braking means and a control apparatus therefor.

  In an elevator apparatus provided with a braking device having an electromagnetic magnet, it is known to brake the same main rope with a plurality of braking devices. In such an elevator apparatus, a plurality of braking apparatuses are simultaneously operated at the time of emergency braking to realize rapid deceleration, and the elevator apparatus is reliably stopped without causing a car collision or the like. In this case, the braking force generated at the time of emergency braking causes a sudden acceleration change in the hoisting machine and the car of the elevator apparatus, resulting in a problem that the passenger comfort is deteriorated.

  In order to eliminate the problem of deterioration in riding comfort, an elevator equipped with a plurality of braking devices described in Patent Document 1 operates a plurality of braking devices in a predetermined order during emergency braking, and reduces the deceleration when stopping. Sudden changes are suppressed, and vibration and noise are suppressed. Thereby, the elevator is stopped smoothly.

  By the way, when a rapid acceleration change occurs in the hoisting machine, a slip easily occurs between the main rope and the sheave, and when the slip occurs, the contact surface between the main rope and the sheave is damaged. In order to solve this problem, in the elevator described in Patent Document 2, when the car is stopped, the two braking devices are released, and when the car is in the running state, both braking devices are controlled to be opened. doing. At the time of an emergency stop, both braking devices are released, but if a slip occurs between the main rope and the sheave, one braking device is opened again. Furthermore, when the traveling speed of the car reaches a certain value or more, the released braking device is returned to the released state.

JP 2009-215047 A JP 2011-57316 A

  Generally, it is known that when a sudden acceleration change is caused in a hoisting machine of an elevator apparatus, a slip is induced between a main rope and a sheave. At the time of emergency braking from high-speed traveling, rapid deceleration is required for rapid stop of the car, and slippage is likely to occur between the main rope and the sheave. If a slip occurs between the main rope and the sheave, the contact surfaces of each other slide at high speed and damage occurs, and in the worst case, the strands of the main rope break. Therefore, it is one of the most important issues in an elevator apparatus to suppress the occurrence of slip due to a rapid acceleration change of the hoist.

  In the elevator apparatus described in Patent Document 1, a plurality of braking devices are operated in a predetermined order during an emergency stop to smoothly stop the elevator apparatus. However, in the elevator apparatus described in this publication, the operation start speed of each braking device is set in advance and is not controlled according to the acceleration change of the hoisting machine. Therefore, since the braking of each braking device is started regardless of whether or not a slip actually occurs between the main rope and the sheave, the braking device is not operated even when there is no slip and the braking device should be operated. On the other hand, there is a possibility that suitable braking cannot be performed, for example, sudden deceleration is not canceled even though slip actually occurs.

  Moreover, in the elevator apparatus described in Patent Document 2, since the power source for switching the release and release of each braking device and the release state from the release state is operated independently of the elevator control device, It is difficult to reduce the size of the hoisting machine and the control device as a whole, and if the hoisting machine and the control device are to be installed in the machine room, an extra space is required in the machine room, which is efficient. Layout and space saving is difficult.

  The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to suppress the occurrence of slip between the main rope and the sheave and reduce the speed in the case of emergency braking from high-speed traveling in the elevator apparatus. It is to obtain a stable braking force from the start to the stop of the car.

  In order to achieve the above-mentioned object, there is a car weight that lifts and lowers in the hoistway, a main rope that connects the car and the counterweight to both ends, and a hoisting machine on which the main rope is mounted, In an elevator apparatus comprising a plurality of braking devices for braking the hoisting machine, a governor to which a speed detection device for detecting the speed of the car is attached, and a control device for controlling the plurality of braking devices, The control device includes an abnormality detection device that detects an abnormality in the elevator device, an operation control device that commands operation of the plurality of braking devices, a speed of the car that operates the plurality of braking devices, and a braking device. A table in which an operation order is stored, and the operation control device determines an operation start speed of a car that commands operation start of the plurality of braking devices, and includes the moving direction and the acceleration. It is obtained corrected according to the operating condition of the car.

  In order to achieve the above object, the present invention also detects a plurality of braking devices that apply braking force to a braked body attached to a hoisting machine that drives a main rope of the elevator device, and an abnormality in the elevator device. An abnormality detection device, a speed detection device that detects the driving movement direction and speed of the car, and a control device for an elevator apparatus that includes a load detection device that detects the load on the car, the plurality of braking devices are sequentially provided. A table in which order data to be operated are stored; and an operation control device that instructs the plurality of braking devices to operate in response to an abnormality command from the abnormality detection device, wherein the operation control device includes the abnormality detection device. When an abnormality command is input from the above, an operation command is output to the first braking device among the plurality of braking devices, and the second and subsequent braking devices are The operation start speed is obtained based on the order data stored in the vehicle, the moving direction and speed of the car detected by the speed detecting device, and the loading load of the car detected by the loading load detecting device. An operation command is issued when the speed reaches the calculated operation start speed.

  According to the present invention, since the relation of the operation speed of the braking device according to the tension ratio generated by the elevator device is acquired in advance, the driving state of the car is monitored in the case of emergency braking from high speed traveling. Thus, the occurrence of slip between the main rope and the sheave can be suppressed, and a stable braking force can be obtained from the start of deceleration to the stop of the car.

It is a schematic diagram of one Example of the elevator apparatus which concerns on this invention. It is a flowchart which shows the processing operation of the control apparatus which the elevator apparatus shown in FIG. 1 has.

  Hereinafter, an embodiment of an elevator apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of an elevator apparatus 1 according to the present invention. FIG. 2 is a flowchart showing processing contents in the control device 7 for the braking devices 14 and 15 provided in the elevator apparatus shown in FIG.

  The elevator apparatus 1 includes a car 3 that moves up and down in a hoistway 2 formed in a building structure, a counterweight 5 that moves up and down in a direction opposite to the car 3, and one end that is balanced on the car 3 side. The main rope 4 is connected to the weight 5 side. A machine room (not shown) is provided at the top of the hoistway 2, and the main rope 4 is mounted on the hoisting machine 11 that raises and lowers the car 3 and the counterweight 5 by winding the main rope 4 around the machine room. A curling wheel 6 is disposed. The warping wheel 6 is located in the vicinity of the hoisting machine 11.

  A loading load detection device 22 that detects a loading load of a passenger or the like is attached to the car 3. The loaded load detection device 22 is, for example, a load sensor installed under the floor of the car 3, detects the load loaded in the car 3, and outputs the details to the control device 7 described later.

  A governor rope 17 is also attached to the car 3. The governor rope 17 moves up and down in conjunction with the lifting movement of the car 3. The governor rope 17 is mounted on a governor (speed governor) 16 disposed in a machine room provided above the hoistway 2 and drives the governor 16. The governor 16 is used to detect and adjust the traveling speed of the car 3 and has a speed detecting device 21. The speed detection device 21 is an encoder, for example, and detects the rotational speed and direction of the governor 16 and outputs the detected speed to the control device 7.

  The hoisting machine 11 has a motor (not shown) and a sheave 12 attached to the output shaft of the motor. The main rope 4 is wound around the sheave 12. A disc-shaped braked body 13 for a plurality of braking devices 14 and 15 is also attached to the output shaft of the motor. A plurality (two in the present embodiment) of braking devices 14 and 15 constituted by electromagnetic brakes are disposed on the outer peripheral portion of the body to be braked 13 at intervals in the circumferential direction.

  The braking devices 14 and 15 of this embodiment are electromagnetic brakes, and the brake pads are separated from the braked body 13 against the springs attached to the electromagnetic brakes while the braking devices 14 and 15 are energized. The brake is released. On the other hand, when the braking devices 14 and 15 are not energized, the brake pads 13 sandwich the braked body 13 by the urging force of the springs of the braking devices 14 and 15 to apply the braking force. In the present embodiment, the time when the braking devices 14 and 15 are not energized is called the operation of the braking device.

The plurality of braking devices 14 and 15 can brake the car 3 even when only one of them operates. And even if it is at the time of the rapid deceleration which operates all the several braking devices 14 and 15 simultaneously, several braking devices so that the deceleration of the car 3 may not exceed 1G (= 9.8 m / s < ² >). A total braking torque value of 14 and 15 is set.

  In the elevator apparatus 1 configured as described above, a control panel 28 is provided to control the raising / lowering of the car 3 and the opening / closing of the car door and the landing door. On the other hand, a control device 7 is provided to control the braking devices 14 and 15 during emergency braking. In this embodiment, the control device 7 is separate from the control panel 28 and can operate the braking devices 14 and 15 independently of the normal operation control by the control panel 28.

  The control device 7 for the braking devices 14 and 15 includes a computer on which a CPU, a ROM, a RAM, and the like are mounted, and is installed in a machine room (not shown) together with the hoisting machine 11. The control device 7 includes an abnormality detection device 23, an operation control device 24, a table 25, and a voltage holding circuit 26.

  The operation control device 24 receives the rotation speed signal 31 of the governor 16 detected by the speed detection device 21 of the governor 16 and the detection signal 32 of the loaded load detection device 22 attached to the car 3. The motion control device 24 calculates the speed of the car 3 from the input rotational speed signal 31 of the governor 16. Further, the amount of change is calculated from the rotational speed of the governor 16 obtained based on the rotational speed signal 31 of the governor 16, and the acceleration of the car 3 is also calculated. On the other hand, the load on the car 3 is calculated from the load signal 32 detected by the load detection device 22.

  The abnormality detection device 23 determines whether the speed and acceleration of the car 3 obtained by the operation control device 24 based on the detection signal 31 of the rotational speed detection device 21 of the governor 16 exceed a predetermined limit value. When the limit value is exceeded, the abnormal signal 33 is output to the operation control device 24. In addition, if the loaded load detection device 22 attached to the car 3 exceeds the predetermined rated weight of the car 3, an overload signal is output to the operation control device 24.

  Note that the abnormality detection device 23 also outputs an abnormality signal 33 to the operation control device 24 even when the motor of the hoisting machine 11 has abnormal heat generation or excessive torque is generated in the motor. If the abnormality detection device 23 determines that an abnormality that significantly affects the operation of the elevator apparatus 1 has occurred, the operation control device 24 outputs command signals 35 and 36 to operate the braking devices 14 and 15. To do.

  When an abnormality occurs in the elevator apparatus 1 and the abnormality detection device 23 outputs an abnormality signal to the operation control device 24, the operation control device 24 operates the plurality of braking devices 14 and 15 installed in the hoisting machine 11. In this embodiment, since the plurality of braking devices 14 and 15 are actuated stepwise, the operation control device 24 is connected to the first braking device 14 with a braking command 36 and is connected to the operation control device 24. A voltage holding command signal 35 is output to the voltage holding circuit 26 used for controlling the braking device 15.

  The voltage holding circuit 26 outputs a voltage holding command 37 to the second braking device 15 while the voltage holding command signal 35 is commanded from the operation control device 24. At this time, the operation control device 24 inquires the table 25 which is a previously determined voltage holding database 38 and determines the holding timing of the voltage holding command signal 35 to be output to the voltage holding circuit 26. In the second braking device 15, the operation of the second braking device 15 is stopped and the brake is released while the voltage holding command 37 from the voltage holding circuit 26 is maintained. Thereby, it becomes possible to operate the second braking device 15 after the operation of the first braking device 14.

  The table 25 stores order data for operating the braking devices 14 and 15 in order, and a reference speed and a reference acceleration of the operation start speed. More specifically, the second braking is applied to the table 25 when the ratio of the tension acting on the main rope 4 on the car 3 side to the tension acting on the main rope 4 on the counterweight 5 side is approximately 1. The operation start speed for each type of device 15 is stored as a reference speed.

  Furthermore, as will be described later, correction data for the operation start speed for correcting the reference speed in accordance with the operation state of the elevator apparatus 1 is also stored. The correction data is obtained by testing in advance and is given as a table or a mathematical expression. In this data, the operation start speed of the second braking device 15 tends to decrease as the tension ratio increases.

  Next, the operation control of the two braking devices 14 and 15 installed in the hoisting machine 11 will be described using the flowchart shown in FIG. The following processing shown in the flowchart of FIG. 2 is executed when a computer included in the control device 7 reads a predetermined program.

  When an abnormality that determines that it is necessary to stop the operation of the elevator apparatus 1 occurs, the abnormality detection device 23 of the control device 7 detects the abnormality (step S101). The operation control device 24 of the control device 7 refers to the database stored in the table 25 and controls the operation of each of the braking devices 14 and 15 based on the order data in the database.

  That is, the operation control device 24 outputs a braking command 36 to the first braking device 14 from among the plurality of braking devices 14 and 15 installed in the hoisting machine 11 (step S102). Here, the thing of the same specification is used for the some braking devices 14 and 15, and the motor of the hoisting machine 11 can be braked independently. When the braking command 36 is input, the first braking device 14 immediately stops energization and starts a braking operation (step S103).

  In the table 25, speed data Vb for starting the operation of the second braking device 15 is set in advance together with order data for operating the first braking device 14 and the second braking device 15 in order. . Therefore, from when the abnormality detection device 23 outputs the abnormality signal 33 to the operation control device 24, the second braking device 15 is energized and maintained in the brake release state by the voltage holding command 37 from the voltage holding circuit 26. The

  When the first braking device 14 operates in step S103, the speed detection device 21 attached to the governor 16 detects the moving direction (up or down) of the car 3 and the driving speed of the car 3 (step S104). At the same time, the load detection device 22 attached to the bottom of the car 3 detects the load (step S105).

Next, the operation control device 24 of the control device 7 calculates the amount of change in the speed of the car 3 from the driving direction and the driving speed of the car 3 detected in step S104, and calculates the acceleration αB of the car 3 (step First half of S107). Since the speed data Vb and the reference acceleration data αb for operating the second braking device 15 are acquired and stored in the table 25 in advance, the operation control device 24 stores the speed data Vb and the acceleration data αb set in the table 25. Reference is made (step S106). Then, the operation start speed VB ₁ of the second braking device 15 is obtained from the operation speed data Vb, and the reference acceleration α ₁ for operating the second braking device 15 is obtained from the acceleration data αb. It is corrected using the actual acceleration αB and the reference of the acceleration alpha ₁ of the relationship between the car 3 take the operation start speed VB ₁ obtained, to calculate the actual operation start speed VB of the final second brake device 15 (Second half of step S107).

A specific correction / calculation example of the operation start speed VB in the operation control device 24 is as follows. Acceleration αB of the car 3 calculated from the detection value of the velocity detection device 21 attached to the governor 16 is greater than the reference acceleration alpha ₁ described in the acceleration data αb, the operation of the second brake device 15 The starting speed VB is made slower than the value described in the speed data Vb. Conversely, acceleration αB of the car 3 calculated from the detection value of the velocity detection device 21 is less than the reference acceleration alpha ₁ according to the acceleration data αb, the operation start speed of the second brake device 15 VB Is made faster than the written value of the speed data Vb.

  Immediately before the abnormality detection device 23 outputs the abnormality signal 33 to the operation control device 24 and the first braking device 14 operates, the load on the car 3 balances with the tension of the main rope 4 on the car 3 side. Due to the difference in tension between the main ropes 4 on the weight 5 side, there is a risk that traction failure will occur in the sheave 12. For example, such a situation occurs when the tension on the side of the car 3 is too high and the car 3 descends suddenly.

  Therefore, the magnitude relationship between the load on the car 3 side and the load on the counterweight 5 side is determined. Since the weight on the counterweight 5 side is almost always constant because the weight of the counterweight 5 is almost constant, the load on the side of the car 3 is detected by the load detection device 22. The detected load of the car 3 is compared with the load of the known counterweight 5.

  When the moving direction of the car 3 is on the heavy load side, the operation start speed VB is made slower than the reference value of the speed data Vb. On the contrary, when the car 3 is moving to the side where the load is small, the operation start speed VB is made faster than the reference value of the speed data Vb. That is, when the car 3 side is heavy and is descending, the operation start speed VB of the second braking device 15 is made slower than the value described in the speed data Vb. In addition, when the car 3 is heavy, if it is rising, the operation start speed VB of the second braking device 15 is made faster than the value described in the speed data Vb. The correction amount of the operation start speed VB described above is stored in the table 25 as a table or a mathematical expression.

  In step S108, it is determined whether or not the speed of the car 3 obtained from the output of the speed detection device 21 attached to the governor 16 has reached the operation start speed VB. When the speed of the car 3 reaches the operation start speed VB, the process proceeds to step S109. In step S <b> 109, the operation control device 24 outputs a non-energized voltage holding command signal 35 to the voltage holding circuit 26 in order to operate the second braking device 15. The voltage holding circuit 26 shuts itself off in response to the non-energized voltage holding command signal 35 from the operation control device 24 (step S110). Thereby, the voltage holding command 37 of the second braking device 15 is interrupted, and the second braking device 15 is activated in addition to the first braking device 14 (step S111). In step S111, the second braking device 15 is de-energized, and the brake pad is held between the brake target body 13 by the spring force.

  When the abnormality detection device 23 outputs the abnormality signal 33 to the operation control device 24 by the process shown in FIG. 2, the operation control device 24 sets a time interval according to the ascending / descending speed of the car 3. First, the second braking devices 14 and 15 are operated sequentially. This allows emergency stop of the elevator device as quickly as possible without causing passengers discomfort.

  By the way, the traction performance (trackability) of the hoisting machine 11 provided in the elevator apparatus 1 has a correlation with the moving speed of the main rope 4. That is, the higher the moving speed of the main rope 4, the lower the traction performance, and the more easily slip occurs between the main rope 4 and the sheave 12. In addition, as the acceleration change of the main rope 4 increases, the ratio of the generated tension increases, and slippage between the main rope 4 and the sheave 12 easily occurs.

  The change in the acceleration of the main rope 4 is determined from the operating conditions of the elevator apparatus 1 such as the moving direction and speed of the car 3, the loaded load, and the braking torques of the first and second braking devices 14 and 15. Therefore, if the elevator apparatus 1 is controlled so that the acceleration change of the main rope 4 does not become excessive, the slip between the main rope 4 and the sheave 12 can be suppressed.

  In this embodiment, the moving direction, speed, and acceleration of the car 3 during operation are detected by the speed detector 21 attached to the governor 16, and the load of the car 3 is detected at the bottom of the car 3. Since the measurement is actually performed by the device 22, optimum braking is possible. That is, the operation start speed VB of the second braking device 15 is corrected and calculated according to the detected value, so that the operation of the second braking device 15 is performed at an appropriate time according to the actual driving situation of the elevator apparatus 1. Has started. Accordingly, it is possible to suppress the occurrence of slip between the main rope 4 and the sheave 12 as compared with the case where the operation start speed VB of the second braking device that is conventionally used is set to a constant value. And since the stable brake braking force can be obtained from the deceleration start of the driving speed of the car 3 to the stop, it is possible to reduce the discomfort due to the brake operation to the passenger. In addition, the stop distance can be shortened.

  In the said Example, the 1st, 2nd braking devices 14 and 15 are controlled independently, respectively. In addition, the first and second braking devices 14 and 15 are of the same standard and have the ability to stop the elevator car alone. Therefore, even if one of them breaks down, the raising / lowering of the car 3 of the elevator apparatus 1 can be reliably stopped by the braking force of the other braking apparatus.

  The present invention is not limited to the above-described embodiments, and includes various conceivable forms without departing from the gist of the present invention described in the claims. For example, in the present embodiment, the number of braking devices 14 and 15 is two, but may be three or more.

  When the elevator apparatus has three or more braking devices, the voltage holding circuit 26 shown in FIG. 1 is installed for each braking device or for all the braking devices except one. Then, after the operation of the second braking device shown in FIG. 2 (step S111), the processing of the operation (steps S106 to S111) from the operation start speed calculation of the third and subsequent braking devices to the operation of the braking device is performed. repeat.

  Furthermore, although the said Example demonstrated the elevator apparatus which has arranged the hoisting machine in the machine room of the top part of the hoistway 2, this invention is applied also to the elevator apparatus which has arranged the hoisting machine in the hoistway. Needless to say. In that case, although the control apparatus 7 and the hoisting machine 11 are installed in the hoistway 2, in order to ensure maintainability, it is desirable to integrate a control apparatus with a control panel.

  In the above embodiment, the control panel is provided in the pit 29 at the lower part of the hoistway. However, the position of the control panel is not limited to the lower part of the hoistway, and may be a machine room. In any case, it is preferable to provide in a place where maintenance is easy. Moreover, in the said Example, although the control apparatus of the braking device was made into the different body from the control panel, you may make it integrate and accommodate in the same housing | casing.

In the above embodiment, the load is obtained by using the acceleration of the car. However, the tension measuring means is provided on both the car side and the counterweight side main rope, and the second braking is performed based on the output of the tension measuring means. The operation timing of the device may be determined,
In the above embodiment, the control panel is provided with control functions necessary for normal elevator operation, such as calculation of the speed and acceleration of the car executed by the abnormality detection device and the operation control device, and the calculation function of the load of the car. The control device may have only a control function related to the braking means. In that case, it is preferable to input the abnormal signal directly from the control panel to the control device.

  Further, in the above embodiment, an electromagnetic brake is used for the braking device, and the brake is released when energized and the brake is activated when de-energized. However, the braking device is not limited to this. In short, when an abnormality occurs in the elevator device and the brakes are activated, the brakes do not operate all at once, but can be operated sequentially, and can be operated at the timing shown in the above embodiment. If it is.

  DESCRIPTION OF SYMBOLS 1 ... Elevator apparatus, 2 ... Hoistway, 3 ... Riding car, 4 ... Main rope, 5 ... Balance weight, 6 ... Warpage wheel, 7 ... Control apparatus, 11 ... Hoisting machine, 12 ... Sheave, 13 ... Braked 14 ... (first) braking device, 15 ... (second) braking device, 16 ... governor (governor), 17 ... governor rope, 21 ... speed detection device, 22 ... loading load detection device, 23 ... Abnormality detection device, 24 ... operation control device, 25 ... table, 26 ... voltage holding circuit, 28 ... control panel, 29 ... pit, 31 ... rotational speed signal, 32 ... load signal, 33 ... abnormal signal, 35 ... voltage holding command Signal, 36 ... braking command, 37 ... voltage holding command, 38 ... database inquiry.

Claims (7)

A carriage and a counterweight that moves up and down in the hoistway, a main rope that connects the carriage and the counterweight to both ends, a hoisting machine on which the main rope is mounted, and braking the hoisting machine In an elevator apparatus comprising a plurality of braking devices, a governor to which a speed detecting device for detecting the speed of the car is attached, and a control device for controlling the plurality of braking devices,
The control device includes an abnormality detection device that detects an abnormality in the elevator device, an operation control device that commands operation of the plurality of braking devices, a speed of the car that operates the plurality of braking devices, and a braking device. A table in which the operation order is stored, and the operation control device converts the operation start speed of the car that commands operation start of the plurality of braking devices into an operation state of the car including a moving direction and acceleration. Elevator apparatus characterized by correcting in response.   The speed detection device of the governor is capable of detecting the moving direction and speed of the car, and is provided with a load loading device for detecting the load of the car on the car, and the operation control device includes a plurality of the load control devices. 2. The elevator apparatus according to claim 1, wherein an operation start speed for instructing an operation of the braking device is corrected based on a loading load of the car detected by the loading load detecting means.   The elevator device according to claim 1 or 2, wherein the control device obtains an acceleration used for correcting an operation start speed commanded to the braking device from a speed detected by the speed detection means.   The elevator apparatus according to any one of claims 1 to 3, wherein the control device is provided with a voltage holding circuit that operates the plurality of braking devices at intervals. A plurality of braking devices that apply braking force to a braked body attached to a hoisting machine that drives a main rope of the elevator device, an abnormality detection device that detects an abnormality in the elevator device, and a direction and speed of operation of the car In a control device for an elevator apparatus comprising a speed detection device for detecting the load and a load detection device for detecting the load of the car,
A table in which order data for operating the plurality of braking devices in sequence is stored; and an operation control device for instructing the plurality of braking devices to operate in response to an abnormality command from the abnormality detecting device. When an abnormality signal is input from the abnormality detection device, the device outputs an operation command to the first braking device among the plurality of braking devices, and the second and subsequent braking devices are stored in the table. The operation start speed is obtained on the basis of the obtained order data, the moving direction and speed of the car detected by the speed detection device, and the loading load of the car detected by the loading load detection device, and the speed of the car is obtained. A control device for an elevator apparatus, wherein an operation command is issued when the operation start speed is reached.   The motion control device calculates an acceleration from an amount of change in speed detected by the speed detection device, and when the acceleration value obtained by the calculation is larger than a reference value stored in the table, a plurality of the braking operations are performed. When the operation start speed of the braking device that operates slowly in the device is slowed down and the acceleration value obtained by the calculation is smaller than the reference value stored in the table, the braking device slows down in the plurality of braking devices. 6. The control device for an elevator apparatus according to claim 5, wherein an operation start speed of the operating braking device is increased.   The operation control device judges the magnitude relationship between the load on the counterweight side and the load side using the load detected by the load detection device, and the moving direction of the car detected by the speed detection means is a load. When moving to the side judged to be large, the operation start speed of the braking device is slowed down, and when moving to the side judged to be small, the operation start speed of the braking device is made fast The control device for an elevator apparatus according to claim 5 or 6.

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