JP2006193293A - Elevator control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator control device capable of easily detecting the deviation and automatically correcting the deviation of a hanging rope when an elevator travels by regulating the control quantity of a hoist by using the calculated deviation even when the deviation of the hanging rope occurs in a system using two hoists for one car and one balance weight. <P>SOLUTION: In the elevator control device in which hanging ropes 5a, 5b stretched over two hoists 1a, 1b are connected to a car 6 side or a balance weight 7 side via sheaves 4a, 4b, and both ends of the hanging ropes are connected to the balance weight side or the car side, an inclination preventive device 31 to prevent the inclination of the balance weight or the inclination of the car by correcting the deviation of the hanging ropes is provided between both ends of the hanging ropes and the balance weight or the car. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an elevator control device using a drive system with two hoisting machines.

In a conventional system in which a car of an ultra-high capacity elevator is driven by a single hoisting machine, it is necessary to arrange a large single hoisting machine having an appropriate large torque and large output. Therefore, the size and weight of the hoisting machine are also increased, and there is a problem that a lifting crane having a large capacity and a large lifting height is required for installation during construction. Moreover, it is necessary to develop a new high capacity machine for the hoisting machine itself.
Therefore, for example, as shown in Patent Document 1, by driving a car with two or more hoisting machines, it is not necessary to increase the size and weight per vehicle, and the problem is solved.

JP-A-6-64863

As shown in Fig. 7 (A), the basic elevator system that drives a car with two hoisting machines is composed of two 1: 1 roping systems and a single car part. is there. In this system, the load applied to the two hoisting machines and the load applied to the suspension ropes 5a, 5b are equal if the hoisting machines 1a, 1b are driven at the same speed. However, even if the two hoisting machines are controlled at the same speed, it is inevitable that a speed error will occur due to a control error, and an imbalance of the load cannot be avoided. In addition, when emergency braking is applied due to a power failure, the speeds of both hoists are equal due to the difference in brake application timing of both hoists, brake torque rising error, slip due to the difference in friction force of the brake lining, etc. Rather, extreme load imbalances can occur.
Furthermore, when there is no correction (absorption) means due to deviation or error, the relative position of the two balance weights of the car is shifted, so that the car position is deviated or the car and balance weight parts are illustrated in FIG. 7 (B) may cause contact with a safety device such as a shock absorber. Or I had to make a design with enough room to allow for the gap. Further, once the deviation occurs, the deviation cannot be detected, and the deviation cannot be corrected.

The elevator control device according to the present invention connects a suspension rope suspended on two hoisting machines to a car side or a counterweight side via a pulley, and both ends of the suspension rope to a counterweight side or a car side. In the elevator controller that drives the car and the counterweight by connecting to the
The inclination of the balance weight or the ride by correcting (absorbing) the deviation of the suspension rope caused by the relative position of the ride car and the balance weight being shifted between the ends of the suspension rope and the balance weight or the car. An inclination prevention device for preventing the inclination of the car is provided.

According to the elevator control device of the present invention, in a system using two hoisting machines for one car and one counterweight, normal service is continued even when a hanging rope slip occurs. it can. That is, the suspension rope deviation can be easily detected, the deviation amount is easily calculated, and the control amount of the hoisting machine is adjusted using the calculated deviation amount. As a result, it is possible to automatically correct the suspension rope deviation when the elevator travels, and thus the elevator can be moved up and down without colliding the counterweight.
In addition, since both ends of the suspension rope are suspended by one counterweight or one carriage, it can be easily detected that the length of the suspension rope has become equal, and the suspension rope is equipped with a tilt prevention device. It can be easily detected from the detection device of the tilt prevention device that the lengths have become equal, and the counterweight (or car) itself can be prevented from tilting. Further, since there is only one counterweight, there is no need to increase the counterweight side rail.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In addition, the same code | symbol shows the same or an equivalent part between each figure.

Embodiment 1 FIG.
In the elevator control apparatus according to Embodiment 1 of the present invention, a suspension rope suspended from two hoisting machines is connected to a car side or a counterweight side via a pulley, and both ends of the suspension rope are counterweighted. Connect to the side or the car side, and correct (absorb) the displacement of the suspension rope caused by the relative position of the carriage and the balance weight being shifted between the opposite ends of the suspension rope and the balance weight or the cage. A tilt prevention device for preventing the tilt or the tilt of the car is provided.

1A and 1B are basic configuration diagrams of an elevator control apparatus according to Embodiment 1 of the present invention. FIG. 1A shows a normal state, and FIG. 1B shows a state when a suspension rope is displaced.
In the figure, the car 6 and the counterweight 7 are moved up and down by two hoisting machines 1a and 1b, two deflecting wheels 4a and 4b, and suspension ropes 5a and 5b suspended from these. Further, the car 6 and the counterweight 7 are connected by suspension ropes 5a and 5b via a pulley (moving pulley) 10 disposed on the upper part of the car 6, and the counterweight 7 is inclined to the counterweight provided on the upper part thereof. It is connected via the prevention device 31. Furthermore, both ends of the suspension ropes 5a and 5b are connected to both sides of the counterweight tilt prevention device 31, and the central portion of the weight tilt prevention device 31 is pivotally supported by the connecting body 70 of the counterweight 7, and the weight tilt prevention device 31 itself. Is swingable like a seesaw.

  FIG. 2 shows a modification of FIG. 1. In this case, the car tilt prevention device 32 is provided on the car 6 side, and the movable pulley 10 is provided on the counterweight 7 side. Accordingly, the car tilt prevention device 32 is pivotally supported by the connecting body 60 on the car 6 side in the same manner as the weight tilt prevention device 31, and the car tilt prevention device 32 itself is swingable in a seesaw shape.

As shown in FIGS. 1 and 2, the elevator control apparatus according to the first embodiment of the present invention performs uniform speed control with two hoisting machines 1a and 1b, whereby a car 6 and a counterweight 7 are provided. Is raised and lowered.
In other words, since the car is driven by two hoisting machines, when a speed difference or slip occurs due to a control error between the hoisting machines that are controlled at the same speed, the relative position of the car and the balance weight part. By shifting, the length from the hoisting machine to the counterweight or the car, that is, the suspension length from the counterweight or the car is different. That is, the lengths of the hanging ropes are not equal. Therefore, it is detected that the lengths are not equal, and it is detected that a slip has occurred in the car or the counterweight, and the operation of correcting the suspension rope displacement at the relative position is performed.

Since both ends of the suspension rope only need to be fixed to the tilt prevention device 31 or 32, the suspension ropes 5a and 5b can be easily connected without using an annular rope.
Even if the uniform speed control of the hoisting machines 1a and 1b is performed, the suspension rope slips due to the accuracy of the deflector, control error, emergency stop, etc. Although it is conceivable that the position is shifted, even if the movable pulley 10 rotates and the suspension rope shift e occurs as shown in FIG. 1 (B), the weight inclination prevention device 31 shown in FIG. By tilting in this manner, the relative position shift to a certain extent is corrected (absorption correction). Even if a deviation occurs, smooth operation can be continued without the counterweight 7 or the car 6 tilting. Further, the car tilt prevention device 32 shown in FIG. 2 is similarly tilted as shown in FIG. 3 (B), and even if the suspension rope shift e occurs, the balance weight 7 or the car 6 continues to operate smoothly without tilting. Is possible.
Furthermore, since the both ends of the suspension rope are fixed to the weight inclination prevention device 31 or the car inclination prevention device 32, there is no slippage caused by a pulley or the like, and the suspension rope relative position is surely generated. Can be detected.

Embodiment 2. FIG.
As shown in FIGS. 4 to 6, the elevator control apparatus according to the second embodiment of the present invention is configured such that the counterweight inclination prevention apparatus 31 or the car inclination prevention apparatus 32 according to the first embodiment is shifted in relative position. Inclination detection devices 33 and 34 for detecting the displacement of the suspension rope by detecting the inclination of the inclination prevention devices 31 and 32 are provided.
For example, the inclination detection device 33 is configured as shown in FIGS.
In FIG. 4, the inclination detecting device 33 is provided with contacts 33a and 33b arranged on the car 6 side or counterweight 7 side, and contacts 33c and 33d arranged on the inclination preventing device 31 or 32 side.
When the inclination prevention device 31 or 32 reaches a certain inclination due to the occurrence of the suspension rope deviation, the contacts 33b and 33d are opened. The amount of displacement of the suspension rope when the contacts 33b and 33d are separated is the difference between the angle α when the contacts are separated and the length between the suspension ropes 5a and 5b as d. The relationship is e = dsin α.
At this time, when the contacts 33b and 33d are separated, the suspension rope 5a side has a longer suspension length. On the other hand, when the contacts 33a and 33c are separated, the suspension rope 5b is long.
Next, the inclination detecting device 33 in FIG. 5 is a case where an encoder or the like that can know the angle α between the car 6 or the counterweight 7 and the inclination preventing devices 31 and 32 is installed as an inclination detector.
For example, when the length d between the suspension ropes 5a and 5b and the angle of the inclination detection device is α, the displacement amount e of the suspension rope is e = dsin α, and the generated displacement of the suspension rope is detected more precisely. can do.

Embodiment 3 FIG.
The elevator control apparatus according to the third embodiment of the present invention relates to the installation location of the counterweight inclination detection apparatus or the car inclination detection apparatus, and the inclination detection apparatus when the car 6 stops at a predetermined floor, It is installed at a predetermined position in the hoistway facing the tilt prevention device.
That is, since the main part of the inclination detecting device 33 can be installed in a nearby hoistway where the inclination preventing devices 31 and 32 are moved up and down, it can be installed in a stable place where it cannot move.
FIG. 6 shows an example of the overall configuration of the car inclination detecting device. (A1) and (B1) are enlarged views of the car inclination detecting device, and (A2), (B2), and (c) are on a certain floor. It is operation | movement explanatory drawing of the passenger car inclination detection apparatus arrange | positioned just beside the inclination prevention apparatus 31 or 32 when the cage | basket | car 6 stops. (A1) corresponds to (A2), and (B1) corresponds to (B2).
As shown in FIG. 6, in the car inclination detecting device, the light emitting unit 80a and the light receiving unit 80b using the photoelectric device are stopped in the hoistway when the car 6 stops. It is arranged right next to it and can detect the position without contact.
That is, there is no inclination when the reflected light L from the light emitting section 80a enters the light receiving section 80b, and there is an inclination when the reflected light cannot be detected by the light receiving section 80b. Further, by arranging the light receiving portions 80b at a plurality of locations, it is possible to detect the direction in which the hanging rope is displaced and the amount of inclination of the inclination preventing device 31 or 32.
The inclination detection of the inclination prevention device 31 or 32 is performed while the elevator is stopped. As a result, the detection can be performed more accurately without being affected by disturbances such as car vibration caused by raising and lowering the elevator. For example, when the car stops on a certain floor, the tilt prevention device 31 or 32 is arranged right next to the stop so that the suspension rope deviation is detected or measured when the elevator is stable. Can do.

Embodiment 4 FIG.
The travel distance correction of the hoist according to the fourth embodiment of the present invention will be described.
First, the operation for correcting the lobe deviation after detecting the deviation of the hanging lobe will be described.
It is assumed that the deviation amount e is obtained from the rope deviation detection. When the next call occurs, for example, it is assumed that the shift amount e is reduced by reducing the speed of the hoisting machine 1 out of the two hoisting machines 1 and 2. In this case, the travel distance is corrected by traveling at the constant speed of the hoist 1 (the constant speed -v, v is a corrected speed value v> 0) during the next travel. After this operation, the deviation amount is measured again, and if there is still a deviation, such as deviation amount e ′ is “e> e ′> 0”, the correction speed value is set to v = 2v, that is, the value is doubled. To do.
On the other hand, when the deviation e ″ is a negative value, that is, when the inclination of the inclination prevention device is reversed,
Operate with v = 1 / 2v and a smaller correction speed value. In this way, in one hoisting machine, by repeatedly correcting the rated speed with the corrected speed value v, an operation in which the difference between the rope feeding amounts of the two hoisting machines, that is, the deviation e is reduced. Is possible.
Thus, the suspension rope deviation amount e is calculated using the suspension rope deviation calculation device 34 from the inclination of the inclination prevention device 31 or 32 detected using the inclination detection device 33 while the elevator is stopped, and the suspension rope deviation distance is calculated. Based on the above, the travel distance of the elevator hoisting machine for the next run is corrected.

Next, another correction method will be described. First, FIG. 10 is a control block of an elevator that is conventionally operated by one hoist.
In FIG. 10, when the elevator call is generated (41), the distance from the current car position (42) to the destination floor position is calculated by the travel distance calculation device (44), and a predetermined acceleration, A speed pattern is calculated by the speed pattern calculation device (45) from the rated speed and the rounding time. In accordance with this speed command, elevator lift control is performed. PI controllers (48a), (48b) based on information from the elevator speed command (46) and the actual elevator speed information, for example, the rotational speed detection devices (47a), (47b) of the hoisting machine such as an encoder. ) To calculate torque commands (49a) and (49b).
For example, the current to the actual hoist such as CT is detected (50a) and (50b), and the PWM controller (52a) and (52b) are detected by the PI controller (51a) and (51b) using the value. To generate a signal, drive the inverters (53a) and (53b), and drive the hoisting machine at a desired speed.

  In the elevator operated by the two hoisting machines according to the present invention, as shown in the flowchart of FIG. 8, when the suspension rope is detected while the suspension is stopped and the deviation is detected, the next traveling is corrected from the normal elevator traveling. It will be carried out after moving to the elevator running.

FIG. 9 shows a control block of this elevator, and the description of the same parts as those of FIG. 10 described above is omitted.
Considering a case in which a deviation as shown in FIG. 1B occurs in the suspension rope, the suspension rope deviation calculation device (34) detects, for example, the suspension rope deviation amount which is the suspension rope deviation amount e. Suppose that the next time the car 6 is called up / down stroke TR in the UP direction. In that case, in the hoisting machine 1a, the car travel distance is TR + e / 2, and in the hoisting machine 1b, the car travel distance is calculated by the travel distance computing device (64) so as to be TR-e / 2. Different speed patterns are calculated for the hoisting machines 1a and 1b by the respective speed pattern calculation devices (65a) and (65b). At this time, the difference in travel distance between the hoisting machines 1a and 1b is canceled out between the hoisting machines, and the car travel distance remains TR. For this reason, it does not affect the car position control. In this way, the hoisting machines 1a and 1b are each provided with a difference in the driving amount (roping length of the rope) of the suspension rope, so that the deviation of the suspension rope can be corrected during traveling.

BRIEF DESCRIPTION OF THE DRAWINGS It is a basic block diagram of the control apparatus of the elevator in Embodiment 1 of this invention, (A) is a normal state, (B) shows the state when the suspension rope has shifted. It is a basic block diagram which shows the modification of the control apparatus of the elevator in Embodiment 1 of this invention. It is an enlarged view which shows the outline | summary of an inclination prevention apparatus. It is an enlarged view which shows operation | movement of an inclination detection apparatus. It is an enlarged view which shows operation | movement of an inclination detection apparatus. An example of the whole structure of a car inclination detection apparatus is shown, (A1) (B1) is an enlarged view of a car inclination detection apparatus, (A2) (B2) (c) is a car inclination installed in the hoistway. It is operation | movement explanatory drawing of a detection apparatus. It is a basic composition figure of two conventional hoisting machine type elevators. It is a flowchart of the hanging rope deviation detection operation | movement of the elevator apparatus of this invention. It is a control flowchart of the elevator apparatus of this invention. It is a control flowchart of the conventional elevator apparatus in one hoisting machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a, 1b Hoisting machine 4a, 4b Baffle 5a, 5b Suspension rope 6 Car 60 Connection body 70 Connection body 7, 7a, 7b Counterweight 10 Moving pulley 31 Weight inclination prevention apparatus 32 Car cage inclination prevention apparatus 33 Inclination detection apparatus 34 Suspension rope displacement calculation device 41 Call generation device 42 Car position detection device 43 Target floor car position detection device 44, 64 Travel distance calculation device 45, 65a, 65b Speed pattern calculation device 46, 66a, 66b Speed command 47 Rotation Detection device 48, 48a, 48b Speed PI controller 49a, 49b Torque command 50a, 50b Current detector 51a, 51b Current PI controller 52a, 52b PWM generator 53a, 53b Inverter device 54a, 54b Hoisting machine 80a Light emitting unit 80b Light receiving section.

Claims (8)

In an elevator control apparatus that drives a car and a counterweight by connecting a suspension rope suspended between two hoisting machines to the car side via a pulley and connecting both ends of the rope to the counterweight side. ,
A control device for an elevator, characterized in that a balance weight inclination prevention device for correcting a deviation of the suspension rope and preventing the balance weight from being tilted is provided between both ends of the suspension rope and the balance weight. In an elevator control device that drives a car and a counterweight by connecting a suspension rope suspended on two hoisting machines to the counterweight side via a pulley and connecting both ends of the suspension rope to the car side. ,
An elevator control apparatus comprising a car tilt prevention device that corrects a deviation of the hoisting rope to prevent the car from tilting between both ends of the hoisting rope and the car.   2. The elevator control according to claim 1, wherein the counterweight tilt prevention device includes a counterweight tilt detection device that detects a shift of the suspension rope by detecting a tilt of the counterweight tilt prevention device. apparatus.   3. The elevator control according to claim 2, wherein the car inclination prevention device includes a car inclination detection device that detects an inclination of the car inclination prevention device and detects a deviation of the suspension rope. 4. apparatus.   The balance weight inclination detecting device is installed at a predetermined position in a hoistway facing the balance weight inclination preventing device when the car is stopped on a predetermined floor. Elevator control device.   The said car inclination detection apparatus was installed in the predetermined position in the hoistway facing the said counterweight inclination prevention apparatus, when the said car stops at a predetermined floor. Elevator control device.   Next time, the speed of the hoisting machine is controlled by feeding back the displacement of the suspension rope detected by the counterweight inclination detecting device or the car inclination detecting device to the drive control unit of at least one hoisting machine. The elevator control device according to claim 1 or 2, wherein the travel distance of the elevator hoisting machine is corrected. A travel distance calculation device is provided for calculating the travel distances of the two hoisting machines based on the shift of the elevator travel distance and the suspension rope due to the next call. The elevator control device according to claim 1, wherein the control device for the elevator is corrected.

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