JPH04313582A - Elevator adjusting device - Google Patents

Abstract

PURPOSE:To adjust brake torque without using a weight, and moreover make this adjustment work simplified and performed accurately and efficiently. CONSTITUTION:A brake actuation command is outputted with a brake actuation command generation means 24 when an elevator cage 13 travels and its reaching a given position in an elevating path is confirmed with a brake torque adjustment mode setting means 21 and a cage position recognizing means 22. Brake torque is adjusted with a calculated value as a basis by calculating then brake torque with a brake torque calculating means 25 by signals from a cage speed detection means 23 and the brake actuation command generation means 24.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator adjustment device, and more particularly to an elevator adjustment device capable of adjusting brake torque.

0002

2. Description of the Related Art As a conventional elevator adjustment device of this type, there is a technique disclosed in Japanese Patent Laid-Open No. 1-197290.

FIG. 9 is a front view showing an electromagnetic brake that is assembled integrally with a conventional elevator hoisting machine.

In the figure, reference numeral 50 denotes a pair of brake levers, which are always biased in the direction of arrow A by a spring 51. 52 is a brake shoe attached to each brake lever 50, 53 is a brake wheel that rotates together with an electric motor (not shown), and 54 is an electric motor (not shown).
A brake wheel 53 is fixed to this rotating shaft 54. Reference numeral 55 denotes a substantially L-shaped cam, which rotates in the direction of arrow B as the brake lever 50 moves in the direction of arrow A. 56 is a plunger that is in contact with the tip of the cam 55, and 57 is a brake coil that attracts and moves the plunger 56 by supplying power.

In the electromagnetic brake having this configuration, the brake lever 50 is always urged in the direction of arrow A by the spring 51. For this reason, the brake shoe 52 is
3 to stop this rotation. In this state,
The cam 55 rotates in the direction of arrow B, pushing up the plunger 56. On the other hand, when power is supplied to the brake coil 57, the plunger 56 is attracted by the brake coil 57 and descends. Along with this downward movement, the cam 55 moves toward arrow C.
The brake lever 50 also rotates in the direction of arrow D against the biasing force of the spring 51. The rotation of the brake lever 50 causes the brake shoe 52 to release the brake wheel 53. As a result, the rotating shaft 54 is driven by the electric motor to move the elevator up and down as appropriate.

[0006] This type of brake mechanism is indispensable from the viewpoint of ensuring the safety of the elevator, and when the elevator is stopped, all the load is applied to the brake. At this time, if the tightening torque of the brake is not sufficient, the brake may slip and become very dangerous. On the other hand, if the tightening torque is too strong, when the elevator suddenly stops, the stop shock will be very large, which can be dangerous.

Therefore, it is necessary to properly adjust the tightening torque of this brake (hereinafter simply referred to as "brake torque"). Conventionally, the method for this adjustment is to first reduce the weight to approximately 125% of the car load. Pick it up and pick up spring 51 in the machine room.
The biasing force of the brake is adjusted to prevent the brake from slipping.

[0008]

[Problems to be Solved by the Invention] The conventional elevator adjustment device described above uses an electromagnetic brake as the brake mechanism, and the method for adjusting the brake torque is to apply a weight of about 125% of the car load. I needed a ride. Moreover, after the adjustment was completed, it was necessary to lower the weight again, which required a great deal of time and effort.

[0009] In addition, with this adjustment method, the adjustment is only made to the extent that the brake does not slip, but the brake may be tightened too strongly or too weakly, and it is not necessarily within a certain standard. Adjusting the brake torque was not easy.

[0010] Therefore, the object of both inventions is to provide an elevator adjustment device that can adjust the brake torque without using a weight, and that can simplify, accurately and efficiently perform this adjustment work. .

[0011]

[Means for Solving the Problems] An elevator adjustment device according to the first invention includes a brake torque adjustment mode setting means for setting a brake torque adjustment mode, and a car position recognition means for recognizing the position of the elevator car.
a brake operation command generation means for outputting a brake operation command when it is confirmed that the elevator car has traveled and reached a predetermined position in the hoistway; a car speed detection means for detecting the speed of the elevator car; The brake torque calculating means calculates the brake torque based on the signals from the speed detecting means and the brake operation command generating means.

[0012] In the elevator adjustment device according to the second invention, the elevator car is moved by a brake torque adjustment mode setting means for setting a brake torque adjustment mode and a car position recognition means for recognizing the position of the elevator car; a brake operation command generation means for outputting a brake operation command when it is confirmed that a predetermined position in the hoistway has been reached; a car speed detection means for detecting the speed of the elevator car; the car speed detection means and the brake operation; A brake torque calculating means for calculating brake torque based on a signal from the command generating means, and a brake torque adjusting means for adjusting the brake torque to be within a predetermined range based on the signal from the brake torque calculating means. It is.

[0013]

[Operation] In the first invention, when it is confirmed by the brake torque adjustment mode setting means and the car position recognition means that the elevator car is running and has reached a predetermined position in the hoistway, the brake operation command generation means is activated. In addition to outputting the brake operation command, the brake torque calculation means calculates the brake torque at that time based on the signals from the car speed detection means and the brake operation command generation means. The brake torque can be adjusted appropriately, and the brake torque can be adjusted appropriately without installing a weight.

In the second invention, when it is confirmed by the brake torque adjustment mode setting means and the car position recognition means that the elevator car is running and has reached a predetermined position in the hoistway, the brake operation command generation means is activated. In addition to outputting the brake operation command, the brake torque calculation means calculates the brake torque at that time based on the signals from the car speed detection means and the brake operation command generation means, and applies the brakes so that this calculated value falls within a predetermined range. Since the brake torque is adjusted by the torque adjustment means, the brake torque can be automatically adjusted without installing a weight.

[0015]

[Examples] Examples of each invention will be described below.

<Embodiment of the first invention> FIG. 1 is a block diagram showing the entire system of an elevator adjustment device which is an embodiment of the first invention.

In the figure, reference numeral 1 denotes a microcomputer that controls the operation of the elevator, and includes a CPU 1a that is a central processing unit, a ROM 1b that is a read-only memory,
It has a RAM 1c which is a readable and writable memory, and a bus 1d that connects these. 2 is a well-known pulse width modulation circuit that modulates and controls the pulse width of a square wave pulse based on the voltage command value output from the microcomputer 1;
is an inverter that converts the current controlled by the pulse width modulation circuit 2 into alternating current with variable voltage and variable frequency; 4 is a three-phase AC power supply; 5 is a circuit breaker connected to the three-phase AC power supply 4; and 6 is a three-phase AC power supply. 7 is a smoothing capacitor that smooths the DC and supplies it to the inverter 3; 8 is a converter that converts the DC into DC;
is an induction motor for a hoisting machine that is driven and controlled by an inverter 3; 9 is a pulse generator that is directly connected to the induction motor 8 and generates pulses corresponding to the rotational speed of the induction motor 8; 10 is a pulse generator generated by the pulse generator 9; a counter that counts pulses,
11 is a sheave driven by an induction motor 8; 12 is a sheave 11;
13 is an elevator car connected to one end of the rope 12; 14 is a counterweight connected to the other end of the rope 12; 15 is an electromagnetic brake 16 based on instructions from the microcomputer 1; 16 is an electromagnetic brake having the same structure as the electromagnetic brake described in FIG.

The elevator adjustment device of this embodiment is constructed as described above and includes a mechanism for calculating the brake torque of the electromagnetic brake 16.

FIG. 2 is a block diagram showing a brake torque calculation mechanism of an elevator adjustment device according to an embodiment of the first invention.

In the figure, reference numeral 21 denotes a brake torque adjustment mode setting means, which sets the brake torque adjustment mode. Reference numeral 22 denotes a car position recognition means, which calculates the car position while the elevator is running. Reference numeral 23 denotes car speed detection means, which detects the ever-changing speed of the elevator car 13. Reference numeral 24 denotes a brake operation command generation means, which generates a brake operation command based on the outputs of the brake torque adjustment mode setting means 21 and the car position recognition means 22, and outputs it to the brake control circuit 15. 25 is a brake torque calculation means, and the brake operation command generation means 2
When a brake operation command is issued from 4, the brake torque is calculated based on the value obtained by the car speed detection means 23. This calculation result is then displayed on the display 17. Note that each of the above arithmetic operations is executed within the microcomputer 1.

Next, regarding the brake torque calculation operation by the elevator adjustment device of this embodiment, FIGS. 2, 3,
This will be explained using FIG.

FIG. 3 is a flowchart showing a brake torque calculation operation performed by an elevator adjustment device according to an embodiment of the first invention.

In the figure, first, in step S1, it is determined whether the brake torque adjustment mode is set. If not set, the operations from step S2 to step S9 are not performed. When the brake torque adjustment mode is set, it is determined in step S2 whether or not the brake operation command is in the "on"state;
If the brake operation command is not in the "on" state, the process advances to step S7, where it is determined whether the elevator is running in high-speed automatic operation. If the elevator is not running in high-speed automatic operation, this brake torque calculation operation is not performed. Further, if the elevator is running in high-speed automatic operation in step S7, it is determined in step S8 whether the elevator car 13 has reached the center position of the hoistway. This judgment is made by the car position recognition means 2.
This is done by 2. When it is recognized that the elevator car 13 has reached the center position of the hoistway, a brake operation command is generated in step S9, and the electromagnetic brake 16 is activated via the brake control circuit 15. If it is not recognized that the elevator car 13 has reached the center position of the hoistway, the process ends without issuing a brake operation command. The car position is recognized by the car position recognition means 22 by detecting the amount of movement of the elevator car 13 in proportion to the travel of the elevator car 13.
The current position of No. 3 is calculated to recognize the center position of the hoistway. On the other hand, if the brake operation command is in the "on" state in step S2, the process proceeds to step S3, where the car speed V at the time of brake operation is detected by the car speed detection means 23, and Vbe is determined from the brake torque measurement speed Vbs.
If it is within the range, in step S4 the time during this period is counted as brake slip time tbk, and in step S5 it is determined whether the elevator car 13 has completely stopped. to judge. In the case of a complete stop, the average deceleration αbk at the time of brake slip is calculated as αbk=(Vbs-Vbe)/tbk in step S6 based on the brake slip time tbk obtained in step S4, and this calculation result is is output to the display 17. Note that the speed detection by the car speed detection means 23 is performed using a pulse tachometer, an encoder attached to the governor, or the like.

By the way, the brake torque can be expressed by the following equation (1). T=J・k・αbk+TL
(1) where T is the brake torque, J is the total moment of inertia of the elevator, k is a constant proportionality constant, αbk is the average deceleration at the time of brake slip, and TL is the load torque.

Therefore, if the above equation (1) is transformed into an equation for the average deceleration αbk at the time of brake slip, the following equation (2
) is obtained. αbk=(T-TL)/J・k
...Equation (2)

00
26] For example, to find the brake torque adjustment value when the car load is 125%, calculate the brake slip at this time from the brake torque T when the car load is 125%, the total moment of inertia J of the elevator, and the load torque TL. The average deceleration αbk can be calculated in advance. Then, since this calculated value is displayed on the display 17, a worker such as a maintenance worker adjusts the brake torque so that it becomes this calculated value.

FIG. 4 is a characteristic diagram supplementing the flowchart of FIG. 3, and shows the state of the flowchart of FIG. That is, it shows the car speed when the brake operation command is issued when the elevator car 13 reaches the center position of the hoistway while the elevator is running at the rated speed in high-speed automatic operation.

In the figure, Vbs is the speed at which the measurement of the brake slip time tbk begins, and Vbe is the speed at which the measurement of the brake slip time tbk ends. Further, αbk is the average deceleration at the time of brake slip.

In the above embodiment, the average deceleration αbk at the time of brake slip was used as the adjustment value of the brake torque, but similarly, the traveling distance from the brake torque measurement speed Vbs to 0 (time integral value of the measurement speed) was used as the adjustment value of the brake torque. Good too. In other words, the travel distance S from brake torque measurement speed Vbs to 0
It is clear from the following equation (3). S=Vbs/2αbk=Vbs2 J・k/2
(T-TL) ...(3) formula

As described above, the elevator adjustment device of this embodiment includes: brake torque adjustment mode setting means 21 for setting the brake torque adjustment mode; car position recognition means 22 for recognizing the position of the elevator car 13; A brake that outputs a brake operation command when it is confirmed by the brake torque adjustment mode setting means 21 and the car position recognition means 22 that the elevator car 13 is running and has reached the center position (predetermined position) of the hoistway. operation command generation means 24; and car speed detection means 2 for detecting the speed of the elevator car.
3, a brake torque calculation means 25 that calculates the brake torque based on the signals from the car speed detection means 23 and the brake operation command generation means 24, and a display 17 that displays the calculation result by the brake torque calculation means 25 (
external display means).

That is, in the elevator adjustment device of this embodiment, the elevator car 13 is moved by the brake torque adjustment mode setting means 21 and the car position recognition means 22.
When it is confirmed that the center position of the hoistway has been reached, the brake operation command generation means 24 outputs a brake operation command, and the brake torque is calculated based on the signals from the car speed detection means 23 and the brake operation command generation means 24. The means 25 calculates the brake torque at that time and displays the calculation result on the display 17.

Therefore, the brake torque calculation result can be accurately known through the display 17. and,
A worker such as a maintenance worker can adjust the brake torque as appropriate so that the calculated value is achieved. Therefore, there is no need to mount a weight and adjust the brake torque as in the past, and all work can be done in the machine room, saving the time and effort of loading and unloading the weight. Further, the brake torque is not tightened too strongly or too weakly, and the brake torque can be adjusted within a certain standard. As a result, the adjustment work can be simplified and the brake torque can be adjusted accurately and efficiently.

<Embodiment of the second invention> FIG. 5 is a block diagram showing the entire system of an elevator adjustment device which is an embodiment of the second invention, and FIG. 6 is a diagram showing an electromagnetic brake which is an embodiment of the second invention. FIG. 7 is a block diagram showing a brake torque calculation mechanism of an elevator adjustment device according to an embodiment of the second invention. In the drawings, the same reference numerals and symbols as those in the conventional example and the embodiment of the first invention indicate constituent parts that are the same as or correspond to those in the conventional example and the embodiment of the first invention.

In the figure, reference numeral 31 denotes a brake torque determining means, which determines whether the calculated value of the brake torque is within a predetermined range based on a signal from the brake torque calculating means 25. Reference numeral 32 denotes a brake force adjusting means that actually adjusts the braking force according to the determination result of the brake torque determining means 31, and the urging force of the spring 51 is appropriately adjusted by this brake force adjusting means 32. The brake torque determining means 31 and the brake force adjusting means 32 constitute a brake torque adjusting means. Note that the other configurations are the same as those of the embodiment of the first invention described above. That is, this embodiment adds a brake torque adjusting means to the embodiment of the first invention described above.

Next, the brake torque calculation operation and brake torque adjustment operation by the elevator adjustment device of this embodiment will be explained with reference to FIG. FIG. 8 is a flowchart showing a brake torque calculation operation and a brake torque adjustment operation by an elevator adjustment device according to an embodiment of the second invention.

In the figure, from step S1 to step S
The operation 9 indicates the brake torque calculation operation, which is performed from step S1 to step S described in FIG. 3 of the first invention.
The operation is the same as No. 9. Therefore, here, the description will focus on the brake torque adjustment operation, which is the operation after step S10.

After determining the brake torque adjustment value based on the brake slip deceleration in step S6, it is determined in step S10 whether the brake torque adjustment value is within a specified range. If it is within the specified range, step S
The operations from step S11 to step S13 are not performed, and the process returns to the main routine and the elevator is braked without adjusting the brake torque. Further, if the brake torque adjustment value is outside the specified range in step S10,
Proceeding to step S11, it is determined whether or not the adjusted value of the brake torque is larger than the specified range. If it is larger, a tightening command is issued to the plunger of the spring 51 attachment part in step S12, and the brake force adjusting means 32 After the predetermined amount of tightening is performed, the process returns to step S1, and after calculating the brake torque, it is determined in step S10 whether or not the adjusted value of the brake torque is within a specified range. On the other hand, if the adjusted value of the brake torque is smaller than the specified range, a relaxation command is issued to the plunger of the spring 51 attachment part in step S13, and after the brake force adjustment means 32 loosens the predetermined amount, the brake force adjuster 32 loosens the plunger again. Returning to step S1, after performing a brake torque calculation operation, it is determined in step S10 whether or not the adjusted value of the brake torque is within a specified range. In this way, this series of adjustment operations is repeated until the brake torque adjustment value falls within the specified range.

As described above, the elevator adjustment device of this embodiment includes: brake torque adjustment mode setting means 21 for setting the brake torque adjustment mode; car position recognition means 22 for recognizing the position of the elevator car 13; A brake that outputs a brake operation command when it is confirmed by the brake torque adjustment mode setting means 21 and the car position recognition means 22 that the elevator car 13 is running and has reached the center position (predetermined position) of the hoistway. operation command generation means 24; car speed detection means 23 for detecting the speed of the elevator car; and brake torque calculation means 25 for calculating brake torque based on signals from the car speed detection means 23 and brake operation command generation means 24. and,
The brake torque adjusting means includes a brake torque determining means 31 and a brake force adjusting means 32, which adjust the brake torque to be within a predetermined range based on a signal from the brake torque calculating means 25.

That is, in the elevator adjustment device of this embodiment, the brake torque adjustment mode setting means 21 and the car position recognition means 22 cause the elevator car 13 to travel and move along the hoistway, as in the embodiment of the first invention. When it is confirmed that the center position has been reached, the brake operation command generation means 24 outputs a brake operation command, and the brake torque calculation means 25 receives signals from the car speed detection means 23 and the brake operation command generation means 24. calculates the brake torque at that time. Then, the brake torque is adjusted by the brake torque determining means 31 and the brake force adjusting means 32 (brake torque adjusting means) so that this calculated value falls within a predetermined range.

[0040] Therefore, since the brake torque can be automatically adjusted as appropriate, there is no need for operators such as maintenance personnel to adjust the brake torque. For this reason, there is no need to mount a weight and adjust the brake torque as in the past, and the time and effort of mounting and lowering the weight can be saved. Further, the brake torque is not tightened too strongly or too weakly, and the brake torque can be automatically adjusted within a certain standard. As a result, the adjustment work can be further simplified, and the brake torque can be adjusted accurately and efficiently.

Further, as another embodiment of each of the above inventions, the brake torque is set as the speed of the elevator car 13 when the brake operation command generation means 24 issues the brake operation command, taking into consideration the safety of maintenance personnel, etc. The speed may be reduced below the rated speed for practical purposes.

Furthermore, in the above embodiment, the position of the elevator car 13 when issuing a brake operation command is set in the hoistway from the viewpoint that the influence of cable unbalance and rope unbalance is generally the least and accurate measurement results can be obtained. However, if there is no car load, it may be placed near the top floor, or if the car load is the rated load, it may be placed near the bottom floor. In these cases, the brake torque can be adjusted to suit each situation, including cable unbalance and rope unbalance.

Furthermore, in each of the above embodiments, the car position recognition means 22 recognizes the car position only when the elevator car 1
The movement amount of the elevator car 13 was detected in proportion to the traveling of the elevator car 13, and the current position of the elevator car 13 was calculated to recognize the center position of the hoistway.
It may be possible to recognize near the top floor, or at least near the bottom floor, or a switch for center position recognition may be provided to detect and recognize the center position, or it may be set near the top floor, or at least near the bottom floor. If necessary, a terminal switch for terminal floor recognition may be used for recognition.

[0044]

As described above, the elevator adjustment device of the first invention includes a brake torque adjustment mode setting means, a car position recognition means, a brake operation command generation means, a car speed detection means, and a brake torque calculation means. and the brake operation command generating means issues a brake operation command when it is confirmed by the brake torque adjustment mode setting means and the car position recognition means that the elevator car is traveling and has reached a predetermined position in the hoistway. With a simple configuration in which the brake torque calculation means calculates the brake torque at that time based on the signals from the car speed detection means and the brake operation command generation means, the brake torque is adjusted to the calculated value of the brake torque. It can be adjusted as appropriate, and the brake torque can be adjusted appropriately without mounting a weight, so the time and effort of loading and unloading the weight can be saved, and the brake torque can be adjusted within a certain standard. Can be done. As a result, the brake torque adjustment work can be simplified, and moreover, can be done accurately and efficiently.

The elevator adjustment device of the second invention includes a brake torque adjustment mode setting means, a car position recognition means, a brake operation command generation means, a car speed detection means,
The brake torque calculation means and the brake torque adjustment means are provided, and when it is confirmed that the elevator car is traveling and has reached a predetermined position in the hoistway, the brake torque adjustment mode setting means and the car position recognition means are provided. The operation command generation means outputs a brake operation command, and the brake torque calculation means calculates the brake torque at that time based on the signals from the car speed detection means and the brake operation command generation means, and this calculated value is within a predetermined range. With a simple structure in which the brake torque is adjusted by the brake torque adjustment means so that Moreover, the adjustment work of the brake torque by a worker or the like as in the first invention is also unnecessary. As a result, the brake torque adjustment work can be further simplified, and moreover, can be done accurately and efficiently.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the entire system of an elevator adjustment device according to an embodiment of the first invention.

FIG. 2 is a block diagram showing a brake torque calculation mechanism of an elevator adjustment device according to an embodiment of the first invention.

FIG. 3 is a flowchart showing a brake torque calculation operation by an elevator adjustment device according to an embodiment of the first invention.

FIG. 4 is a characteristic diagram supplementing the flowchart of FIG. 3;

FIG. 5 is a block diagram showing the entire system of an elevator adjustment device according to an embodiment of the second invention.

FIG. 6 is a front view showing an electromagnetic brake according to an embodiment of the second invention.

FIG. 7 is a block diagram showing a brake torque calculation mechanism of an elevator adjustment device according to an embodiment of the second invention.

FIG. 8 is a flowchart showing a brake torque calculation operation and a brake torque adjustment operation by an elevator adjustment device according to an embodiment of the second invention.

FIG. 9 is a front view of a conventional electromagnetic brake.

[Explanation of symbols]

1 Microcomputer 13 Elevator car 15 Brake control circuit 16 Electromagnetic brake 17 Display 21 Brake torque adjustment mode setting means 22
Car position recognition means 23 Car speed detection means 24 Brake operation command generation means 25 Brake torque calculation means 31 Brake torque determination means 32 Brake force adjustment means

Claims (2)

[Claims] 1. A brake torque adjustment mode setting means for setting a brake torque adjustment mode, a car position recognition means for recognizing the position of the elevator car, and the brake torque adjustment mode setting means and the car position recognition means a brake operation command generation means for outputting a brake operation command when it is confirmed that the elevator car has traveled and reached a predetermined position on the hoistway; a car speed detection means for detecting the speed of the elevator car; and a car speed detection means for detecting the speed of the elevator car. 1. An elevator adjustment device comprising: a brake torque calculating means for calculating a brake torque based on a signal from a brake operation command generating means and a brake operation command generating means. 2. A brake torque adjustment mode setting means for setting a brake torque adjustment mode, a car position recognition means for recognizing the position of the elevator car, and the brake torque adjustment mode setting means and the car position recognition means a brake operation command generation means for outputting a brake operation command when it is confirmed that the elevator car has traveled and reached a predetermined position on the hoistway; a car speed detection means for detecting the speed of the elevator car; and a car speed detection means for detecting the speed of the elevator car. a brake torque calculating means for calculating brake torque based on a signal from the means and the brake operation command generating means; and a brake torque adjusting means for adjusting the brake torque to be within a predetermined range based on a signal from the brake torque calculating means. An elevator adjustment device comprising: