WO2020250329A1

WO2020250329A1 - Adjustment calculation device and adjustment method for elevator device

Info

Publication number: WO2020250329A1
Application number: PCT/JP2019/023211
Authority: WO
Inventors: 木村　哲也; 大塚　康司
Original assignee: 三菱電機株式会社
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-12-17
Also published as: CN113905967A; CN113905967B; JP7088415B2; JPWO2020250329A1

Abstract

This adjustment calculation device for a counterweight of an elevator device comprises an operation control unit that lifts and lowers a car in a state in which the car is unloaded and in a state in which the car or the counterweight is loaded with a test weight of a known weight. The adjustment calculation device acquires the current supplied to an electric motor when the operation control unit lifts and lowers the car, calculates a conversion factor for the elevator device to be adjusted during installation, and accurately finds the adjustment for the counterweight, thereby improving adjustment precision for the counterweight and reducing the adjustment work during the installation.

Description

Adjustment amount calculation device and elevator device adjustment method

The present application relates to an adjustment amount calculation device for a balance weight of an elevator device and an adjustment method for the elevator device.

The elevator device is equipped with an electric motor driven by an electric current and a sheave that rotates in conjunction with the electric motor. A rope with a car on one end and a counterweight on the other end is wrapped around this sheave. The elevator device supplies electric current to the electric motor to raise and lower the car.

The balance weight is designed with a weight that balances with the rider when the load is half the rated load weight. Further, configurations other than the balanced weight of the elevator device, for example, an electric motor, a control device, and the like are also designed so that the balanced weight is a weight balanced with the rider when the load is half the rated load weight. However, the weight of the car may change due to painting and decoration at the installation destination of the elevator device. Therefore, when installing the elevator device, the adjustment work is performed so that the weight of the balance weight becomes the weight balanced with the rider at a load of about half of the rated load weight.

Patent Document 1 discloses a method of adjusting the balance weight at the time of installation. In Patent Document 1, the average of the current values supplied to the electric motor when the car in the no-load state is raised and lowered at a constant speed is obtained. The difference between the average of the obtained current values and the known current values when the balance weight is adjusted to the design weight is calculated. The adjustment amount of the balanced weight is calculated by using the difference between the obtained current values and the conversion coefficient obtained in advance in order to convert the current value into the weight of the balanced weight. The conversion coefficient is obtained in advance by performing a test run on the elevator device having each specification, and the conversion coefficient of the elevator device having the same or similar specifications as the elevator device to be adjusted is used.

JP-A-2005-306557

In the adjustment method disclosed in Patent Document 1, if there are individual differences in the parts used between the elevator device to be adjusted and the elevator device for which the conversion coefficient has been obtained in advance, or if the installation environment is different, the conversion coefficient There is an error in. Further, when the conversion coefficient of the elevator device having specifications similar to those of the elevator device to be adjusted is used, an error occurs in the conversion coefficient of the elevator device to be adjusted.

If there is an error in the conversion coefficient, an error will also occur in the calculated balance weight adjustment amount. If the weight of the balance weight is not adjusted sufficiently and the elevator device is operated with the balance weight inconsistent with the design weight, for example, the current value is supplied to the electric motor more than necessary and the car starts to move up and down. The impact of the time becomes large, causing discomfort to the passengers. Alternatively, if the current value supplied to the electric motor is insufficient, there is a problem that the car does not move.

The present application provides an adjustment amount calculation device and an elevator device adjustment method that can improve the adjustment accuracy of the balance weight by accurately obtaining the adjustment amount of the balance weight in order to solve the above problems. The purpose is to do.

The adjustment amount calculation device of the present application has an operation control unit that raises and lowers the car and operates in a state where the car is unloaded and a state in which a test weight of a known weight is loaded on the car or the balance weight. Using the current value acquisition unit that acquires the current value supplied to the electric motor when the control unit raises and lowers the car, the current value acquired by the current value acquisition unit, and the weight of the test weight. Adjustment of the balance weight using the conversion coefficient calculation unit that calculates the conversion coefficient used to calculate the adjustment amount of the balance weight, the current value acquired by the current value acquisition unit, and the conversion coefficient calculated by the conversion coefficient calculation unit. It is provided with an adjustment amount calculation unit for calculating the amount.

The adjustment amount calculation device and the adjustment method of the elevator device according to the present application calculate the conversion coefficient of the elevator device to be adjusted at the time of installation and accurately obtain the adjustment amount of the balance weight to obtain the adjustment accuracy of the balance weight. It makes it possible to save labor for adjustment work during installation.

Overall schematic view of the elevator apparatus of Embodiment 1. Functional block diagram of the adjustment amount calculation device of the first embodiment A flowchart showing the operation of the adjustment amount calculation device according to the first embodiment. A graph showing the time change of the supply current value during the ascending operation of the first embodiment. A graph showing the time change of the supply current value during the descending operation of the first embodiment. A flowchart showing the operation of the adjustment amount calculation device according to the second embodiment. Hardware configuration diagram of the control device of the first and second embodiments

Embodiment 1.
Hereinafter, a method for adjusting the balance weight according to the first embodiment of the present application will be described. In the description of the drawings, the same parts or corresponding parts are designated by the same reference numerals, and duplicate description will be omitted.

First, the overall configuration of the elevator device 100 that adjusts the weight of the balanced weight by using the method of adjusting the balanced weight according to the first embodiment of the present application will be described. FIG. 1 is an overall schematic view of the elevator device 100 according to the first embodiment of the present application.

The car 1 of the elevator device 100 goes up and down inside the hoistway 2. There is a machine room 3 in the upper part of the hoistway 2, and the machine room 3 includes an electric motor 4, a sheave 5, and a control device 6.

The electric motor 4 is connected to the movement amount detector 41. The movement amount detector 41 detects the rotation angle of the electric motor 4, and gives the detected rotation angle and the movement amount of the car 1 calculated from the rotation angle to the control device 6. The movement amount of the car 1 includes information on the movement direction and the movement distance of the car 1.

The control device 6 controls the entire operation of the elevator device 100. When the car 1 is moved up and down, the control device 6 controls the rotation of the electric motor 4 by controlling the current value supplied to the electric motor 4 based on the rotation angle given by the movement amount detector 41. The sheave 5 is coaxially attached to the electric motor 4, and a rope 8 having a car 1 attached to one end and a balance weight 7 attached to the other end is wound around the sheave 5. When the sheave 5 is driven in conjunction with the rotation of the electric motor 4, the rope 8 moves and the car 1 moves up and down.

In addition, the control device 6 not only raises and lowers the car 1 but also controls the display device of the elevator landing. In the first embodiment, the control device 6 includes an adjustment amount calculation device 60 described later, and also controls the car 1 in order to calculate the adjustment amount of the balance weight 7.

The design weight of the balance weight 7 is generally predetermined to be the sum of the weight of the car 1 and the rated load weight of the elevator device 100. The design weight of the balance weight 7 of the first embodiment is the sum of the weight of the car 1 and half of the rated load weight of the elevator device 100. However, the weight of the balance weight 7 may be set so that the design weight of the balance weight 7 is the sum of the weight of the car 1 and 40% or 45% of the rated load weight. At the time of installation, the operator adjusts the weight of the balance weight 7 by adjusting the weight for adjustment whose weight is known to the balance weight 7 so that the balance weight 7 becomes the design weight.

In FIG. 1, the electric motor 4, the sheave 5, and the control device 6 are installed in the machine room 3, but they may be installed on the wall surface of the hoistway 2.

Subsequently, the detailed configuration of the adjustment amount calculation device 60 according to the first embodiment of the present application will be described with reference to FIG. FIG. 2 is a functional block diagram of the adjustment amount calculation device 60 according to the first embodiment of the present application. A part of the configuration shown in FIG. 1 is not shown in FIG. 2, and a configuration not shown in FIG. 1 is shown in FIG. 2, but FIGS. 1 and 2 show the same structure of the elevator device 100. Is shown.

The adjustment amount calculation device 60 includes an operation control unit 61, an acquisition unit 62, a storage unit 63, a calculation unit 64, and a display operation unit 65. The control device 6 may use these configurations other than the calculation of the adjustment amount of the balance weight 7. Further, the control device 6 may have a configuration not shown in FIG. Hereinafter, only the configuration related to the adjustment amount calculation device 60 will be described.

The operation control unit 61 controls operations such as the traveling direction, the stop floor, and the speed of the car 1. The operation control unit 61 controls the electric motor 4 in order to guide the car 1 to a desired floor. The operation control unit 61 receives the signal from the movement amount detector 41 acquired by the acquisition unit 62, controls the position and speed of the car 1 according to the command position and command speed, and the actual position and speed, and performs current. Get the command value. Then, the voltage command for the electric motor 4 is calculated from the current command value and the actual current value acquired by the current value acquisition unit 621. The control device 6 includes a power converter typified by an inverter, whereby a voltage according to a command value is applied to the electric motor 4. The position control, speed control, and current control performed by the control device may be performed by any method, and any configuration of the power converter does not affect the effect of the present application.

The acquisition unit 62 acquires a value required for calculating the adjustment amount of the balance weight 7. The acquisition unit 62 includes a current value acquisition unit 621, a car position acquisition unit 622, and a current value acquisition instruction unit 623.

The current value acquisition unit 621 acquires the current value supplied to the electric motor 4. The current value acquisition unit 621 may be configured to acquire the current command value calculated by the operation control unit 61 instead of detecting the actual current value. Since the command current and the actual current match due to the current control of the operation control unit 61, which current is used does not affect the effect of the present application.

Note that the current value acquisition unit 621 may perform a filter process on the acquired current value. Since the car 1 and the counterweight 7 are connected by an elastic rope 8, the system has a resonance point. This resonance causes the sheave 5 to sway, causing the electric motor 4 to sway, which in turn causes the movement amount detector 41 to sway. Since the operation control unit 61 calculates the voltage command based on the detected value of the movement amount detector 41, it is conceivable that the calculated voltage command also includes the influence of resonance and the current value of the current value acquisition unit 621 vibrates. ..

In addition, it is possible that a phenomenon similar to resonance occurs due to the action of disturbance due to a rail step in the hoistway, and the current value fluctuates. When the current value acquisition unit 621 acquires the oscillating current when acquiring the current value, it is conceivable that the value that deviates greatly from the average value is instantaneously acquired, which causes an error in the calculation of the adjustment amount. To do. Therefore, the current may be acquired after filtering such as a low-pass filter or a notch filter so as to exclude vibration due to resonance and vibration due to disturbance from the current value.

Further, the current value acquisition unit 621 may perform an averaging process on the acquired current value. As described above, when the current value is oscillating, an error occurs in the calculated adjustment amount of the balance weight 7. Therefore, the influence of vibration may be eliminated by averaging the current values acquired in the predetermined sections before and after the intermediate position of the hoistway 2, and an error may not occur in the calculation of the adjustment amount of the balance weight 7. ..

The car position acquisition unit 622 acquires the movement amount of the car 1 according to the rotation speed of the electric motor 4 from the movement amount detector 41, and acquires the position information of the car 1. Further, the car position acquisition unit 622 may acquire the detection information from the sensor for detecting the car 1 installed in the hoistway 2 to acquire the absolute position of the car 1.

The current value acquisition instruction unit 623 instructs the current value acquisition unit 621 at the time when the current value is acquired. The time point at which the current value is acquired is hereinafter referred to as the current value acquisition time point. At the time of acquiring the current value, there are four times before calculating the adjustment amount of the balance weight 7.

The current value acquisition time is when the distance between the electric motor 4 and the car 1 and the distance between the electric motor 4 and the balance weight 7 match. Since the weight of the balance weight 7 is calculated by using the balance of force, the weight difference due to the difference in the length of the rope 8 between the motor 4 and the car 1 and the motor 4 and the balance weight 7 is eliminated. To do. The current value acquisition instruction unit 623 detects when the distance between the electric motor 4 and the car 1 and the distance between the electric motor 4 and the balance weight 7 match, and instructs the current value acquisition time point. At this time, since the car 1 is approximately in the middle position of the hoistway 2, the position of the car 1 is acquired from the car position acquisition unit 622, and the current value is acquired at the timing when the car 1 is in the middle position of the hoistway 2. You may specify the time point.

Furthermore, the time when the current value is acquired is assumed to be when the car 1 is moving at a constant speed. This is because the forces acting on the car 1 and the balance weight 7 are balanced during constant speed traveling, and the adjustment amount of the balance weight 7 is calculated by using the balance of forces. For example, the current value acquisition instruction unit 623 obtains the speed of the car 1 from the time change of the position of the car 1 acquired from the car position acquisition unit 622, and instructs the timing at which the speed becomes constant as the current value acquisition time point. .. Alternatively, the command value of the speed of the car 1 may be acquired from the operation control unit 61, and the timing at which the speed becomes constant may be detected.

The storage unit 63 stores a value required for calculating the adjustment amount of the balance weight. The storage unit 63 includes a constant storage unit 631 and a numerical storage unit 632.

The constant storage unit 631 stores a constant required for adjusting the weight of the balance weight. These constants are the design value K _t '[N ・ m / A] of the torque constant of the electric motor 4, the radius r [m] of the sheave 5, the rated load weight CP [kg] of the car 1, and the gravity acceleration g [m]. / s ² ] ,. The torque constant is a conversion coefficient that converts the current value into a torque value, and the product of the current value and the torque constant is the torque value. In the first embodiment of the present application, the torque constant of the electric motor 4 is used as a conversion coefficient. The design value K _t '[N ・ m / A] of the torque constant of the electric motor 4, the radius r [m] of the sheave 5, and the rated load weight CP [kg] of the car 1 are determined in advance by the specifications of the elevator device to be adjusted. ing. The actual torque constant of the electric motor 4 and the design value K _t'of the torque constant of the electric motor 4 determined by the specifications are not always the same, and an error may occur. Factors of error include, for example, individual differences in the motor constants of the motor 4, changes in characteristics due to heat, and the influence of the mechanical system.

The numerical value storage unit 632 stores the numerical value acquired, calculated or set at the time of weight adjustment of the balance weight 7 at least until the weight adjustment of the balance weight 7 is completed. Numbers numeric storage unit 632 stores the current value I ₁ ~ I ₄ obtained [A], the torque constant of the motor _{4 K t [N · m /} A], the adjustment amount of the counterweight 7 W _e [kg] , The weight of the test weight is W ₁ [kg]. Although the design value K _t'of the torque constant is stored in the constant storage unit 631, it may be stored in the numerical storage unit 632 and can be changed according to the specifications of the elevator device 100 to be adjusted.

The calculation unit 64 acquires the numerical value stored in the storage unit 63, and calculates or determines the numerical value necessary for calculating the adjustment amount of the balance weight 7. The calculation unit 64 includes a conversion coefficient calculation unit 641, an adjustment amount calculation unit 642, and an adjustment determination unit 643.

The conversion coefficient calculation unit 641 calculates the conversion coefficient. The adjustment amount calculation unit 642 calculates the adjustment amount of the balance weight 7. The adjustment determination unit 643 determines whether or not the error of the conversion coefficient is within a predetermined reference value within an acceptable range, and determines whether or not the weight adjustment of the balance weight 7 is necessary.

The display operation unit 65 accepts operations necessary for adjusting the balance weight 7, and displays information on the weight adjustment of the balance weight 7. The form of the display operation unit 65 may be a touch panel capable of performing both operation and display, or may be a separate body of the button portion for operation and the display portion for display. Further, although the display operation unit 65 is provided in the control device 6 in FIG. 2, it may be displayed in other places such as a landing indicator, or on a management terminal such as a personal computer connected from the outside. It may be configured to output display information.

The display operation unit 65 includes an operation start instruction unit 651, a set value input unit 652, and a display unit 653.

The operation start instruction unit 651 is an interface for instructing the start of running to acquire the current value. When starting the running of the car 1, the worker operates the operation start instruction unit 651 to instruct the start of the adjustment amount calculation operation.

The setting value input unit 652 is an interface for inputting information on the weight of the test weight, which will be described later.

The display unit 653 displays the weight of the weight obtained by the test, the amount of adjustment of the weight, and the like. The display may be a display or a voice reading out a numerical value.

Next, the operation of the adjustment amount calculation device 60 according to the first embodiment of the present application will be described with reference to FIG. FIG. 3 is a flowchart showing the operation of the adjustment amount calculation device 60 according to the first embodiment of the present application.

When the elevator device 100 starts operation, the flow shown in FIG. 3 starts. First, in step S100, the operation control unit 61 determines whether or not the operation start instruction unit 651 has received the instruction to start the adjustment amount calculation operation of the balance weight 7. Step S100 is repeated until the instruction to start the adjustment operation is received.

When the operation control unit 61 receives the instruction to start the adjustment amount calculation of the balance weight 7, the process proceeds to step S101 and the first current value acquisition is started. The calculation of the adjustment amount of the balance weight 7 is started in a state where the car 1 is unloaded. Therefore, the operation control unit 61 may acquire the detection information from the weight sensor provided in the car 1 to confirm whether the car 1 is in a no-load state, and then proceed to step S101.

In step S101, the motion control unit 61 moves the car 1 to the running start position for acquiring the first current value. This travel start position is any position in the hoistway as long as the car 1 can pass through the intermediate position of the hoistway 2 at a constant speed when the car 1 ascends in the subsequent step S102. It may be. Therefore, this position may be below the middle position of the hoistway from the lowest position within the movable range of the car 1.

After the movement of the car 1 is completed, the process proceeds to step S102, and the motion control unit 61 starts controlling the ascending operation of the car 1.

After step S102, the process proceeds to step S103, and the current value acquisition instruction unit 623 determines whether the position of the car 1 is the intermediate position of the hoistway 2 and the speed of the car 1 is constant.

Here, with reference to FIG. 4, the time change of the current value supplied to the electric motor 4 during the ascending operation of the car 1 will be described. FIG. 4 is a graph showing the time change of the current value supplied to the electric motor 4 during the ascending operation. FIG. 4 shows from the stopped state to the ascending movement and stopping again. The vertical axis shows the current value, and the horizontal axis shows the time. It is assumed that the current value is acquired as a negative value. The intervals t ₁ to t ₅ indicate the time interval.

The section t _{1 in} FIG. 4 is just before the car 1 starts the ascending movement, and the car 1 is stopped. From the start of the section t _1, the current value required to keep the car 1 and the balance weight 7 in a balanced state is supplied. During the section t ₁ , the brake of the electric motor 4 is released.

When the balance weight 7 is heavier than the car 1, the ascending operation is a regenerative operation. Therefore, after the brake of the electric motor 4 is released, the operation control unit 61 reduces the current command value in the section t ₂ . In section t _2, step S102 is executed, the car 1 starts to rise and accelerate.

When the car 1 is about to reach the target speed, the operation control unit 61 increases the current command value and decreases the acceleration.

In the section t ₃ , the forces acting on the car 1 are balanced, and the car 1 runs at a constant speed. The supply current value while traveling at a constant speed is constant.

In the section t ₃ , when the current value acquisition instruction unit 623 determines that the car 1 is in the intermediate position and the speed of the car 1 is constant, the process proceeds to step S104.

In step S104, the current value acquisition instruction unit 623 instructs the current value acquisition unit 621 to acquire the current value. The current value acquired at this time is set to I ₁ , and the numerical storage unit 632 stores the current value I ₁ .

Here, the current value I ₁ will be described. While the car 1 in the section t ₃ is running at a constant speed, the forces acting on the car 1 and the counterweight 7 are balanced, but the acquired current value I ₁ is the section as shown in FIG. It is smaller than when t ₁ .

This is because the hoistway loss i _L1, which is a braking force generated in the direction opposite to the movement of the car 1 due to the traveling of the car 1, acts on the car 1. Since the hoistway loss i _L1 works, the current value required for constant speed running so that the car 1 does not accelerate is smaller than that in the stopped state.

The hoistway loss is the loss of frictional force generated by the movement of the car 1 and the force required to bend the rope. The hoistway loss always occurs in the direction opposite to the movement of the car 1.

If the current value I ₁ at the intermediate position of the hoistway when the car 1 is rising at a constant speed with no load is negative in the downward direction from the balance of the forces of the balance weight 7, the following formula 1 is used. expressed.

_{K t [N · m / A} ] is the torque constant of the motor 4, CP [kg] rated load weight of the car 1, W _e [kg] is the adjustment amount of the counterweight ^{7, g [m / s 2} ] Is the gravitational acceleration, r [m] is the radius of the sheave 5, and i _L1 [A] is the hoistway loss during ascending operation.

The torque constant K _t , the adjustment amount W _e of the balance weight 7, and the hoistway loss i _{L 1} during ascending operation are unknown. The rated load weight CP of the car 1, the gravitational acceleration g, and the radius r of the sheave 5 acquire the values stored in the constant storage unit 631. The current value I ₁ acquires a value stored in the numerical storage unit 632.

The design weight of the balance weight 7 of the first embodiment is the sum of the weight of the car 1 and half of the rated load weight of the elevator device 100. Since the weight of the car 1 of the counterweight 7 and the weight of the car 1 cancel each other out, the value of the weight of the car 1 is not required in Equation 1.

The adjustment amount W _e of the balance weight 7 is a value obtained by subtracting the weight of the car 1 from the balance weight 7. Therefore, if the adjustment amount W _e is a positive value, the balance weight 7 is heavier than the target value, and if the adjustment amount W _e is a negative value, the balance weight 7 is lighter than the target value. If the adjustment amount W _e is 0, the balance weight 7 is the sum of the target value of the weight of the car 1 and half the load weight.

After step S104, the process proceeds to step S105, and the motion control unit 61 moves the car 1 to the running start position for acquiring the current value for the second time. This traveling start position may be any position in the hoistway as long as it can pass through the intermediate position of the hoistway 2 at a constant speed when the car 1 descends in the subsequent step S106. Therefore, this position may be above the middle position of the hoistway from the highest position within the movable range of the car 1.

After the movement of the car 1 is completed, the process proceeds to step S106, and the operation control unit 61 starts the control of the descending operation of the car 1.

After step S106, the process proceeds to step S107, and the current value acquisition instruction unit 623 determines whether the position of the car 1 is the intermediate position of the hoistway 2 and the speed of the car 1 is constant.

Here, with reference to FIG. 5, the time change of the current command value output from the operation control unit 61 to the electric motor 4 when the car 1 is lowered is described. FIG. 5 is a graph showing the time change of the supply current value during the descending operation. FIG. 5 shows from the stopped state to the downward movement and the stop again. The vertical axis shows the current value, and the horizontal axis shows the time. The intervals t ₆ to t ₁₀ indicate the time intervals.

Section t _{6 in} FIG. 5 is immediately before the car 1 starts the descending movement, and the car 1 is stopped. From the start of the section t ₆ , the operation control unit 61 outputs a current command value necessary for stopping the car 1 and the counterweight 7 in a balanced state. During the section t ₆ , the brake of the motor 4 is released.

Since the power running operation is performed during the descent operation, the operation control unit 61 increases the current command value in the section t ₇ after the brake of the electric motor 4 is released. In section t ₇ , step S106 is executed and the car 1 starts descending and accelerates.

In interval t _8, torque and shaft Ross and gravity are balanced, the car 1 travels at a constant speed. The supply current value while traveling at a constant speed is constant.

In the section t ₈ , when the current value acquisition instruction unit 623 determines that the car 1 is in the intermediate position and the speed of the car 1 is constant, the process proceeds to step S108.

In step S108, the current value acquisition instruction unit 623 instructs the current value acquisition unit 621 to acquire the current value. The current value acquired at this time is set to I ₂ , and the numerical storage unit 632 stores the current value I ₂ .

Here, the current value I ₂ will be described. While the car 1 is traveling at a constant speed in the section t ₈ , the forces acting on the car 1 and the counterweight 7 are balanced, but the acquired current value I ₂ is the section as shown in FIG. It is larger than at t ₈ .

This is because the hoistway loss i _L2 generated in the direction opposite to the movement of the car 1 due to the traveling of the car 1 acts on the car 1. Since the hoistway loss i _L2 works, the current value required to drive the car 1 at a constant speed so as not to decelerate becomes larger than that in the stopped state.

Assuming that the current value is detected as a negative value, the current value I ₂ at the intermediate position of the hoistway when the car 1 is descending at a constant speed with no load is the balance of the forces with respect to the balance weight 7. It is expressed by the following formula 2.

The same characters as in Equation 1 have the same meaning. i _L2 [A] is the hoistway loss during descent operation. The hoistway loss i _L1 during ascending operation and the hoistway loss i _L2 during descent operation are the same magnitude. The current value I ₂ acquires a value stored in the numerical storage unit 632.

After step S108, decelerate in section t ₉ . Since the ascending operation is a power running operation, the operation control unit 61 reduces the current command value to the electric motor 4 in order to decelerate the car 1. When the car 1 is stopped during the operation control section 61 section t _10, it supplies the current necessary to keep stopping the car 1 and the counterweight 7 in a balanced state. During the period t _10, the motor 4 is stopped by the brake.

After step S108, proceed to step S109. In step S109, it is determined whether or not the current value is acquired four times after the instruction to start the adjustment operation is given in step S100. Specifically, the calculation unit 64 determines whether or not the current value is stored in the numerical value storage unit 632 four times. At this point, the current value is acquired twice, and since it has not been acquired four times, the process proceeds to step S110.

Adjustment amount calculation section 642 at step S110 calculates the adjustment amount W _e of the counterweight 7. Adjustment amount W _e of the counterweight 7 is a adjustment amount of the counterweight 7 which torque constant of the motor 4 is calculated as the design value Kt 'torque constant.

The adjustment amount We _e of the balance weight 7 is expressed by the following formula 3 by calculating the sum of the formula 1 and the formula 2.

At present, the torque constant K _t of the electric motor 4 is unknown, so instead, the design value K _{t'of the} known torque constant is used to obtain the adjustment amount W1 of the approximate balance weight 7. The design value K _{t'of the} torque constant is a constant determined by the specifications of the motor.

The relationship between the design value Kt'of the torque constant and the actual torque constant Kt is expressed by the following formula 4 with the error between the actual value of the torque constant and the design value as α.

If W _e is a positive value, the balance weight 7 is heavier than the target value, and if W _e is a negative value, the balance weight 7 is lighter than the target value, so adjust the weight of the balance weight 7. Therefore, it is necessary to adjust the weight of the balance weight 7 so as to cancel the value of W _e . Therefore, when the adjustment amount of the counterweight 7 of approximately the W _1, by reversing the sign of Equation 3, by using a design value K _t 'of torque constant, the adjustment amount W ₁ of approximately counterweight 7 It is expressed by the following formula 5.

The test weight having the weight closest to the approximate adjustment amount W ₁ of the balance weight 7 calculated in step S110 is added to the balance weight 7. If the calculated adjustment amount W ₁ is a negative value, the work is to remove the weight instead of adding the weight.

When the worker adds the test weight, the adjustment amount calculation device 60 can notify the worker of the value of W ₁ by displaying the calculated value of W ₁ on the display unit 653. The weight of the added test weight is input by the operation start instruction unit 651.

Instead of the worker adding the test weight, it may be added by the elevator device 100. For example, a plurality of test weights and a manipulator capable of grasping the test weights and adjusting the weights to the balance weight 7 are provided in the hoistway 2, and the test weights having an appropriate weight are controlled by the elevator device 100. This is possible if the configuration can be added to the balance weight 7.

If it is not possible to prepare a test weight having exactly the same weight as the calculated adjustment amount W ₁ of the equilibrium weight 7, a test weight having a similar weight may be used. In the first embodiment, it is assumed that a test weight having the same weight is prepared, and the weight of the test weight is W ₁ calculated by the above formula 4.

After step S110, the process proceeds to step S111. In step S111, the motion control unit 61 determines whether or not the weight of the test weight has been input. Determine if the weight of the test weight has been entered. Specifically, the calculation unit 64 confirms whether or not the weight W _{1 of the} test weight has been input to the numerical storage unit 632.

When the operation control unit 61 determines that the weight of the test weight has been input in step S111, the process returns to step S100, and the operations of steps S100 to S109 are performed again. At this time, the numerical storage unit 632 stores the current value acquired in the second step S104 as I ₃ and the current value acquired in step S108 as I ₄ .

When it is determined whether the current value of step S109 has been acquired four times after step S111, it is determined that the current value has been acquired four times, so the process proceeds to step S112.

In step S112, the error α of the torque constant is obtained. Here, a method of calculating the error α of the torque constant will be described.

First, with the test weight of the weight W ₁ calculated by the formula 5 added to the balanced weight 7, the current value I ₃ at the intermediate position of the hoistway while the car 1 is descending at a constant speed is calculated by the following formula 6. expressed.

With the test weight added to the balanced weight 7, the current value I ₄ at the intermediate position of the hoistway while the car is operating at a constant speed is calculated by the following formula 6 from the balance of the forces of the balanced weight. Will be done.

The current values I ₃ and the current values I ₄ obtained by

Equations

6 and 7 can be expressed in the same manner as I ₁ and I ₂ as shown in FIG. In FIG. 4, the values of I ₁ and I ₃ are shown as the same value, but the actual values are different. The same applies to the values of I ₂ and I ₄ shown in FIG.

Using I ₁ , I ₂ , I ₃ , and I ₄ , the error α of the torque constant can be calculated by the following equation 8.

If the error α of the torque constant obtained in step S112 is within the allowable range of the reference value, the error of the weight W ₁ of the test weight calculated in step S110 is also within the allowable range, and the adjustment of the balance weight 7 is completed. At this time, the display unit 653 may display that the adjustment of the balance weight 7 has been completed to notify the worker. The reference value of the error α of the allowable torque constant is determined based on the error allowed by the adjustment of the balance weight 7. For example, if the error allowed for adjusting the balance weight 7 is ± 5%, α is set accordingly.

If the error α of the torque constant obtained in step S112 is not within the reference value, the actual torque constant has an error with the adjustment value of the torque constant, so the approximate adjustment of the balance weight 7 calculated in step S112. There is also an error in the quantity W ₁ . In this case, if the process proceeds to step S113 and the formula 8 is used, the adjustment amount W ₁ of the formula 5 becomes the following formula 9.

Using the error of the torque constant obtained in Equation 8 and recalculating the adjustment amount of the balance weight in Equation 5, the following Equation 9 is obtained.

By adding the adjustment weight of the adjustment amount W ₁ obtained by the formula 9 to the balance weight 7 instead of the test weight of W ₁ obtained by the formula 5, the adjustment without error can be performed. The weight adjustment of the balance weight 7 here is performed by the worker or the elevator device 100 in the same manner as when the approximate adjustment amount in S110 is calculated and the test weight is added.

In the above explanation, the car 1 was moved up and then down, but it may be down and then up.

Further, even if the error α of the torque constant obtained in step S112 is within the permissible range of the reference value (predetermined range), the balance weight 7 is replaced with the test weight of W ₁ obtained by the formula 5. By adding a weight for adjusting the adjustment amount W ₁ obtained in 9, the weight of the balance weight 7 may be adjusted more accurately.

From the above, the car 1 is increasing operation and the current value I _1, I ₂ of the lowering operation without load, and decreasing operation and increased operation adjusted by the adjustment amount calculated from the current I _1, I ₂ unloaded The torque constant can be calculated by acquiring the currents I ₃ and I ₄ at the time. Therefore, it is possible to calculate an accurate adjustment amount of the balance weight 7.

When the worker adjusts the weight of the balance weight 7, it is not necessary to use the adjustment amount calculation device 60. First, the worker measures and records the current value supplied to the electric motor 4 when the car 1 is raised and lowered when the car 1 is unloaded. After that, the worker adjusts the balance weight 7, which is calculated by using the current value acquired when the car 1 is unloaded and the set value of the conversion coefficient used for calculating the adjustment amount of the balance weight 7. The amount is calculated as the weight of the test weight. After that, the worker measures and records the current value supplied to the electric motor 4 when raising and lowering the car 1 with the test weight loaded on the balancing weight 7. The worker calculates the conversion coefficient using the recorded current value and the weight of the test weight. After that, the worker calculates the error between the calculated conversion coefficient and the set value of the conversion coefficient. After that, the worker judges whether or not the error is within the predetermined range, and when it is judged that the error is not within the predetermined range, the worker calculates the adjustment amount of the balance weight 7 by using the calculated conversion coefficient. The worker adjusts the balance weight 7 with the calculated adjustment amount of the balance weight 7.

Therefore, by adjusting the weight of the balance weight 7 once or twice, the worker can calculate the conversion coefficient of the elevator device to be adjusted at the time of installation and can accurately adjust the balance weight 7. The weight adjustment of the balance weight 7 can be completed by moving the car 1 only four times.

As described above, in the first embodiment, the weight of the test weight is calculated from the current when there is no load, the test weight is added to the balanced weight 7, the operation is performed, and the error of the torque constant is calculated. The adjustment accuracy of the weight 7 can be improved. As a result, trial and error adjustment becomes unnecessary, and the adjustment time of the balance weight 7 can be reduced.

Embodiment 2.
Hereinafter, a method for adjusting the balance weight according to the second embodiment of the present application will be described. In the first embodiment, an example of calculating the adjustment amount of the balanced weight 7 in a state where the test weight is loaded on the balanced weight 7 has been described, but in the second embodiment, the test weight is loaded on the car 1. Then, an example of calculating the torque constant and calculating the adjustment amount of the balance weight 7 will be described.

The overall configuration of the elevator device 100 that adjusts the weight of the balanced weight using the method of adjusting the balanced weight of the second embodiment of the present application is the same as the configuration of FIG. 1 shown in the first embodiment. Further, the detailed configuration of the adjustment amount calculation device 60 of the second embodiment of the present application is also the same as the configuration of FIG. 2 shown in the first embodiment.

The operation of the adjustment amount calculation device 60 according to the second embodiment of the present application will be described with reference to FIG. FIG. 6 is a flowchart showing the operation of the adjustment amount calculation device 60 according to the second embodiment of the present application. Since the operation from step S200 to step S209 of the second embodiment is the same as the operation from step S100 to step S109 of the first embodiment, it will be described from step S210.

In the second embodiment, the approximate adjustment amount We of the balance weight performed in step S110 of the first embodiment is not calculated. In the first embodiment, assuming that the torque constant is a set value of the torque constant, the test weight is loaded on the balance weight 7 to adjust the weight by obtaining an approximate adjustment amount of the balance weight 7, but the second embodiment has a second embodiment. This is because the test weight is loaded in the car 1. The weight of the test weight of the second embodiment is not particularly limited.

In step S210, the operation control unit 61 determines whether or not the weight of the test weight has been input, as in step S111. The test weight is loaded by the worker or the elevator device 100 as in the first embodiment. Specifically, the calculation unit 64 confirms whether or not the weight W _{1 of the} test weight has been input to the numerical storage unit 632.

If it is determined that the weight of the test weight has been input in step S210, the process returns to step S200, and the operations from step S200 to step S209 are performed again.

If it is determined whether the current value of step S209 has been acquired four times after step S210, it is determined that the current value has been acquired four times, so the process proceeds to step S211.

In step S211, the torque constant is calculated. Here, a method of calculating the torque constant will be described.

When a test weight with a weight of W1 is loaded on the car, the current value I ₃ during ascending operation and the current value I ₄ during descending operation are the values obtained by subtracting the weight of the test weight from I ₁ and I ₂ . Therefore, with the test weight of weight W ₁ added to the car 1, the current value I ₄ at the intermediate position of the hoistway while the car 1 is descending at a constant speed is expressed by the following mathematical formula 10.

In addition, with the test weight added to the car 1, the current value I ₄ at the intermediate position of the hoistway while the car is operating at a constant speed is calculated by the following formula 11 from the balance of the forces of the balanced weight. expressed.

The current values I ₃ and the current values I ₄ obtained by the formulas 10 and 11 can be expressed in the same manner as I ₁ to I ₄ shown in FIG. The torque constant can be calculated by the following formula 12 using I ₁ , I ₂ , I ₃ , and I ₄ calculated by the formula 1, formula 2, formula 10, and formula 11.

After calculating the torque constant in step S211, the process proceeds to step S212 to calculate the adjustment amount of the balance weight 7. The formula 12 a torque constant and the current value calculated by _{_{_{I 1, I 2, I 3}}} , I 4, the adjustment amount W _e of the counterweight 7 is calculated by the following equation 13.

Note that the weight of the test weight of the second embodiment is loaded with the test weight so that the current value changes sufficiently as compared with the case where the car 1 is operated with no load. This is to prevent the denominator in the calculation formula of the adjustment amount shown in Equation 13 from becoming 0 and to calculate the adjustment amount with high accuracy.

When the worker adjusts the weight of the balance weight 7, it is not necessary to use the adjustment amount calculation device 60. First, the worker measures and records the current value supplied to the electric motor 4 when the car 1 is raised and lowered when the car 1 is unloaded. The worker then loads the car 1 with a test weight of known weight. After that, the worker measures and records the current value supplied to the electric motor 4 when raising and lowering the car 1 with the test weight loaded on the counterweight 7. After that, the worker calculates the conversion coefficient using the recorded current value and the weight of the test weight. After that, the worker calculates the adjustment amount of the balance weight 7 by using the calculated conversion coefficient. After that, the worker adjusts the balance weight 7 with the calculated adjustment amount of the balance weight 7.

Therefore, according to the second embodiment, the worker adjusts the weight of the equilibrium weight 7 once to calculate the conversion coefficient of the elevator device to be adjusted at the time of installation, and at the same time, the operator accurately adjusts the weight of the equilibrium weight 7. Can be adjusted. Further, when the worker loads the test weight on the balanced weight 7, he / she must enter the hoistway 2, but the work of loading the test weight on the car 1 can be performed without entering the hoistway 2. There are advantages.

From the above, according to the second embodiment, the current values I ₁ and I ₂ of the ascending operation and the descending operation when the car 1 is in the no-load state, and the ascending operation in the state where the test weight is loaded on the car 1. By acquiring the current values I ₃ and I ₄ of the descent operation, the torque constant can be calculated and the accurate adjustment amount of the balance weight 7 can be calculated. As a result, the adjustment time of the balance weight 7 can be reduced, and the labor saving of the adjustment of the balance weight 7 can be realized.

Further, in the second embodiment, even if the information on the set value of the torque constant is unknown, the adjustment amount of the balance weight 7 can be obtained.

In the first and second embodiments, the current value is acquired to calculate the conversion coefficient and the adjustment amount of the balance weight. However, if the value represents the output of the electric motor 4, for example, instead of the current value. The torque command value may be acquired and the conversion coefficient and the adjustment amount of the balance weight may be calculated.

Hereinafter, the hardware configuration of the adjustment amount calculation device 60 according to the first and second embodiments will be described with reference to FIG. 7. FIG. 7 is a hardware configuration diagram of the adjustment amount calculation device 60 of the first and second embodiments. The adjustment amount calculation device 60 includes an input device 901, an output device 902, a storage device 903, and a processing device 904.

The input device 901 is an interface for inputting information provided by the acquisition unit 62 and the display operation unit 65 of the adjustment amount calculation device 60. This network may be a wired communication network such as a LAN cable or a coaxial cable, or a wireless communication network using wireless communication technology.

The output device 902 includes an operation control unit 61 of the adjustment amount calculation device 60 and a display operation unit 65. The output device 902 is a control signal or interface. This network may be a wired communication network such as a LAN cable or a coaxial cable, or a wireless communication network using wireless communication technology.

The storage device 903 is provided in the storage unit 63 of the adjustment amount calculation device 60. It is a device that stores the floor on which the car was called, which corresponds to working memory. For example, non-volatile or volatile semiconductor memories such as RAM, ROM, and flash memory, magnetic disks, flexible disks, optical disks, compact disks, and the like are applicable.

The processing device 904 includes an operation control unit 61 and a calculation unit 64 of the adjustment amount calculation device 60. The processing device 904 may be dedicated hardware or a CPU (Central Processing Unit) that executes a program recorded in the storage device 903.

When the processing device 904 is dedicated hardware, the processing device 904 corresponds to, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof. ..

When the processing device 904 is a CPU, the functions of the operation control unit 61 and the calculation unit 64 are realized by software, firmware, or a combination of software and firmware. Software and firmware are described as programs and recorded in the storage device 903. The processing device 904 realizes the functions of each part by reading and executing the program stored in the storage device 903.

Note that each function of the operation control unit 61 and the calculation unit 64 may be partially realized by hardware and partly realized by software or firmware.

For example, the operation control unit 61 may be described as dedicated hardware, and the calculation unit 64 may be described as a program recorded in the storage device 903 to realize its function.

As described above, the processing device 904 can realize each of the above-mentioned functions by hardware, software, firmware, or a combination thereof.

As described above, according to the adjustment method of the adjustment amount calculation device and the elevator device of the present invention, by accurately obtaining the adjustment amount of the balance weight, the adjustment accuracy of the balance weight is improved and the adjustment work is saved. Can be transformed into.

100 Elevator device 1 Car 2 Hoistway 3 Machine room 4 Electric motor 5 Sheave 6 Control device 7 Balanced weight 8 Rope 41 Movement amount detector 60 Adjustment amount calculation device 61 Operation control unit 62 Acquisition unit 621 Current value acquisition unit 622 Car position Acquisition unit 623 Current value acquisition instruction unit 63 Storage unit 631 Constant storage unit 632 Numerical value storage unit 64 Calculation unit 641 Conversion coefficient calculation unit 642 Adjustment amount calculation unit 643 Adjustment judgment unit 65 Display operation unit 651 Operation start instruction unit 652 Setting value input unit 653 Display 901 Input device 902 Output device 903 Storage device 904 Processing device

Claims

In the adjustment amount calculation device of an elevator device including a sheave around which a rope around which a riding car and a balance weight are attached and an electric motor for rotating the sheave are provided.
An operation control unit for raising and lowering the car in a state where the car is unloaded and a state in which a test weight of a known weight is loaded on the car or the balance weight.
A current value acquisition unit that acquires a current value supplied to the electric motor when the operation control unit raises and lowers the car.
A conversion coefficient calculation unit that calculates a conversion coefficient used to calculate the adjustment amount of the balance weight using the current value acquired by the current value acquisition unit and the weight of the test weight.
An adjustment amount calculation unit that calculates an adjustment amount of the balance weight by using the current value acquired by the current value acquisition unit and the conversion coefficient calculated by the conversion coefficient calculation unit.
An adjustment amount calculation device, which comprises.
A display unit for displaying the adjustment amount of the balance weight calculated by the adjustment amount calculation unit is provided.
The motion control unit raises and lowers the car in a state where the test weight is loaded on the balance weight.
The adjustment amount calculation unit
Using the current value acquired by the current value acquisition unit with no load on the car and the set value of the conversion coefficient, the adjustment amount of the balance weight is calculated as the weight of the test weight.
It is determined whether or not the error between the conversion coefficient calculated by the conversion coefficient calculation unit and the set value of the conversion coefficient is within a predetermined range, and if it is determined that the error is not within the predetermined range, the conversion coefficient is calculated. When the adjustment amount of the balance weight is calculated again using the conversion coefficient calculated by the unit and it is determined that the adjustment amount is within the predetermined range, the display unit indicates that the adjustment of the balance weight is completed. The adjustment amount calculation device according to claim 1, wherein the adjustment amount is displayed.
The adjustment amount calculation unit was acquired by the current value acquisition unit when the weight of the test weight was increased with the current value acquired by the current value acquisition unit when the car was unloaded and decreased. Calculated using the sum of the current value and the set value of the conversion coefficient.
The adjustment amount calculation device according to claim 2, wherein the adjustment amount is calculated.
The adjustment amount calculation device according to claim 1, wherein the motion control unit raises and lowers the car in a state where the test weight is loaded on the car.
The adjustment amount calculation unit determines the sum of the current value acquired by the current value acquisition unit when the vehicle is raised in a no-load state and the current value acquired by the current value acquisition unit when the vehicle is lowered. The sum of the current value acquired by the current value acquisition unit when raising the test weight while the test weight is loaded on the car or the balance weight and the current value acquired by the current value acquisition unit when lowering the test weight. The adjustment amount calculation device according to any one of claims 1 to 4, wherein the adjustment amount of the balance weight is calculated by using the conversion coefficient calculated by the conversion coefficient calculation unit.
The conversion coefficient calculated by the conversion coefficient calculation unit is any one of claims 1 to 5, characterized in that the conversion coefficient is a torque constant that converts the current value supplied to the electric motor into the torque value of the electric motor. The described adjustment amount calculation device.
The current value acquisition unit is characterized in that the car travels at a constant speed and acquires a current value when the distance between the car and the sheave and the distance between the balance weight and the sheave are the same. The adjustment amount calculation device according to any one of claims 1 to 6.
The adjustment amount calculation device according to any one of claims 1 to 7, wherein the current value acquisition unit performs an averaging process on the acquired current value.
The adjustment amount calculation device according to any one of claims 1 to 8, wherein the current value acquisition unit performs a filter process for removing the resonance frequency on the acquired current value.
It is a method of adjusting an elevator device including a sheave around which a rope around which a riding basket and a balancing weight are attached and an electric motor for rotating the sheave are provided.
A step of acquiring the current value supplied to the electric motor when the car is raised and lowered when the car is unloaded.
The adjustment amount of the balance weight is calculated as the weight of the test weight by using the current value acquired when the car is unloaded and the set value of the conversion coefficient used for calculating the adjustment amount of the balance weight. Steps and
With the test weight loaded on the balance weight, a step of acquiring the current value supplied to the electric motor when raising and lowering the car, and
A step of calculating a conversion coefficient using the acquired current value and the weight of the test weight, and
Steps to calculate the error between the calculated conversion coefficient and the set value of the conversion coefficient,
It is determined whether or not the error is within the predetermined range, and when it is determined that the error is not within the predetermined range, the adjusted amount of the balance weight is recalculated and calculated using the calculated conversion coefficient. A method of adjusting an elevator device including a step of adjusting the balanced weight with the adjusted amount of the balanced weight.
It is a method of adjusting an elevator device including a sheave around which a rope around which a riding basket and a balancing weight are attached and an electric motor for rotating the sheave are provided.
A step of acquiring the current value supplied to the electric motor when the car is raised and lowered when the car is unloaded.
A step of loading a test weight of known weight into the car,
With the test weight loaded on the balance weight, a step of acquiring the current value supplied to the electric motor when raising and lowering the car, and
A step of calculating a conversion coefficient using the acquired current value and the weight of the test weight, and
Using the calculated conversion coefficient, the step of calculating the adjustment amount of the balance weight and
An adjustment method of an elevator device including a step of adjusting the balance weight with the calculated adjustment amount of the balance weight.
The method for adjusting an elevator device according to claim 10 or 11, wherein the conversion coefficient is a torque constant that converts a current value supplied to the electric motor into a torque value of the electric motor.
In the step of acquiring the current value, the current value is acquired when the car travels at a constant speed and the distance between the car and the sheave and the distance between the balance weight and the sheave are the same. The method for adjusting an elevator device according to any one of claims 10 to 12, wherein the elevator device is adjusted.