JP5269038B2 - Elevator equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator system which can conduct operation for emergency according to the relative displacement of a main rope computed by a computing part, and can obtain an effective vibration control effect with respect to the main rope. <P>SOLUTION: An emergency operation control unit 23 conducts: vibration-control emergency operation by which a car 2 is moved to a position where the vibration of the main rope 4 is restricted, a vibration control member 21 of a vibration control system 17 arranged on the car 2 is moved higher by an extensible mechanism 18, and the vibration of the main rope 4 is controlled by the vibration control member 21 when the relative maximum displacement &alpha; of the main rope 4 computed by the computing part 22 is a predetermined relative displacement threshold (a) or lower; and stop emergency operation by which car movement to the nearest floor for evacuation is prepared when the relative maximum displacement &alpha; of the main rope 4 computed by the computing part 22 exceeds the predetermined relative displacement threshold (a). <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to an elevator apparatus that performs a control operation for vibration control when a building is shaken by an earthquake or the like.

  In a conventional elevator system, when the vibration of a building at the time of an earthquake is detected by a vibration meter, the calculation unit calculates the maximum relative displacement of the main rope or other long object relative to the building based on the detection signal of the vibration meter. There are known ones that perform multi-stage control operation according to the calculated relative maximum displacement amount (see, for example, Patent Documents 1 to 3). In addition, various vibration control devices have been proposed to limit the vibration of the main rope or the like (see, for example, Patent Documents 4 to 10).

JP 2008-114944 A JP 2008-114945 A JP 2008-230771 A Japanese Utility Model Publication No. 50-62870 Japanese Utility Model Publication No. 52-15008 Japanese Utility Model Publication No. 54-23473 JP 57-116519 A JP-A-3-3884 Japanese Patent Laid-Open No. 5-4787 JP 2007-22673 A

  However, in the conventional elevator apparatus, when the damping device as described in Patent Documents 4 to 10 described above is provided, not only for a small relative maximum displacement amount, but also for a relative maximum displacement amount of a large main rope. Since it was the structure which always acts and suppresses a shake | deflection, when it was set as the damping device with the mechanical strength which can endure this, there existed a problem that it would become a big thing and a heavy article. In addition, some of the cars are equipped with a vibration control device, but this is only to prevent vibrations from being transmitted to the car via the main rope, and it is positive to suppress vibrations of the main rope. It was not something. Moreover, in the thing provided in the hoistway wall side, the position which gives a damping action is fixed, and an effective damping effect cannot be expected. Further, as described in Patent Documents 1 to 3, the relative maximum displacement amount of the main rope is calculated, and the stepwise control operation is performed according to the relative maximum displacement amount. Can not expect.

  An object of the present invention is to provide an elevator apparatus capable of performing a control operation according to the relative maximum displacement amount of the main rope calculated by the arithmetic unit and obtaining an effective damping effect on the main rope. Is to provide.

  In order to achieve the above-described object, the present invention achieves the above-described object by using a main rope connected to the elevator car and a counterweight, a vibration meter for detecting the shaking of the building, and a detection signal of the vibration meter. In an elevator apparatus having a calculation unit that calculates a relative maximum displacement amount and a control operation control unit that performs a control operation based on a result calculated by the calculation unit, the swing of the main rope is suppressed at an upper portion of the car. A vibration control device having a vibration control member is provided, and the control operation control unit detects that the relative maximum displacement calculated by the calculation unit is equal to or less than a predetermined relative displacement amount threshold value, and moves the car to the main car. The present invention is characterized in that the vibration control operation including moving to a position where the swing of the rope is restricted is performed.

  According to such a configuration, in a situation where the swing of the building is relatively small and the swing of the main rope continues for a relatively long time even after the swing of the building is attenuated, the configuration is not complicated. It is possible to move the car to a position that restricts the swing of the main rope and to control the main rope in a short time using the car, and to shorten the time to return to normal operation . In addition, since the vibration damping device that stops the main rope is placed at the top of the car, even if the relative maximum displacement of the main rope calculated by the calculation unit exceeds the predetermined relative displacement threshold, The main rope near the car side can be damped without being affected by the swing center portion of the swaying main rope, and a vibration damping device having a relatively simple configuration can be obtained.

  In the invention, it is preferable that the vibration control device has an extension mechanism that further moves the vibration damping member to the upper side of the car when the vibration control operation is performed by the control operation control unit.

  According to such a configuration, when performing damping control operation to dampen the main rope, the damping member is moved further to the upper part of the car and in the vicinity of the fixed end on the car side of the main rope. Instead, the vibration damping member can be operated at a slightly separated upper position, which can more effectively suppress the swing of the main rope.

  Further, in the present invention, the position where the swing of the main rope is limited to the position of the main rope is in the vicinity of the half of the length of the main rope, and the intermediate floor substantially corresponding to the half of the length of the main rope. The position is any one of the positions near the abdomen that is the maximum amplitude of the main rope swing when the relative maximum displacement is calculated by the calculation unit.

  According to such a configuration, during the vibration control operation, the car can be moved to a desired position where the vibration control effect can be always expected and the vibration control device can be applied to the main rope. It can be effectively suppressed.

  Further, according to the present invention, when the control operation control unit detects that the relative maximum displacement amount calculated by the calculation unit exceeds a predetermined relative displacement amount threshold value, the control operation operation of evacuating the car to the nearest floor is performed. It is characterized by being configured to perform.

  According to such a configuration, since the above-described vibration suppression is not performed in a situation where the vibration of the main rope cannot be controlled even by using the vibration damping member at the top of the car, it is impossible for the vibration damping device and the car in that situation. Without excessive vibrations and loads, protecting existing structures, and eliminating the need for a strong vibration control device, without increasing the weight of the car unnecessarily. There is no need to change the components.

  Furthermore, the present invention is characterized in that the nearest floor is a non-resonant floor near the position of one third of the length of the main rope 4 or near one third of the height of the building.

  According to such a configuration, the main rope can be damped by making it non-resonant. When the car is located near the middle floor of the building, or at a position near half the length of the main rope, the governor's natural period is the primary natural period or Because it is easy to approach the value close to it, the governor rope and the compenand rope are easy to swing. Since it is closer to the ground than when it is separated and confined, the time required for rescue can be shortened.

  According to the elevator apparatus according to the present invention, the structure is complicated in a situation where the shaking of the building is relatively small and the swing of the main rope continues for a relatively long time even after the shaking of the building is attenuated. It is possible to control the main rope in a short time using the car by moving the car to a position that limits the swing of the main rope and shortening the time to return to normal operation. it can. In addition, since the vibration damping device that stops the main rope is placed at the top of the car, even if the relative maximum displacement of the main rope calculated by the calculation unit exceeds the predetermined relative displacement threshold, The main rope near the car side can be damped without being affected by the swing center portion of the swaying main rope, and a vibration damping device having a relatively simple configuration can be obtained.

It is a schematic structure figure showing the whole elevator device composition by one embodiment of the present invention. It is a principal part enlarged view of the elevator apparatus shown in FIG. It is a flowchart which shows the operation | movement at the time of control operation by the elevator apparatus shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the elevator apparatus according to the embodiment of the present invention connects a car 2 and a counterweight 3 in a hoistway 1 with a main rope 4 and can move up and down along a guide rail (not shown). It is configured. In the machine room 5 formed in the upper part of the hoistway 1, a hoisting machine 6 around which the main rope 4 is wound, a control panel 7 for controlling the hoisting machine 6 and the like, a vibrometer 8 for detecting the shaking of the building, A speed governor 10 around which a speed governor rope 9 is wound is disposed. Further, in the hoistway 1, power is supplied to the compen- sion rope 11 and the car 2 connected between the car 2 and the counterweight 3 in order to compensate for the weight difference of the main rope 4 when viewed from the hoisting machine 6 side. For example, a tail cord 12, a shock absorber 13 installed in the lower part of the car 2 and the counterweight 3, a bracket 14 for supporting a guide rail (not shown), other hoistway devices, and the like are installed. Furthermore, a damping device 17 is provided at the upper part of the car 2 so as to extend to the upper part and suppress the swing of the main rope 4 when a predetermined condition is satisfied as will be described in detail later.

  FIG. 2 is an enlarged view of a main part of the elevator apparatus shown in FIG. 1. A cross head 16 is provided on the upper part of the car frame 15 of the car 2. The seismic device 17 is installed. The seismic control device 17 includes a pantograph-type expansion / contraction mechanism portion 18 whose lower base side is fixed to the cross head 16, a drive device 19 that drives the expansion / contraction mechanism portion 18 to expand and contract by air pressure, hydraulic pressure, or other means, and a control. A drive device control unit 20 for extending and retracting the drive device 19 when receiving an expansion / contraction operation signal from the panel 7, and a main rope 4 inserted in a through hole in the central portion provided on the expansion / contraction side of the expansion / contraction mechanism unit 18 And a vibration damping member 21 made of rubber or the like. The damping member 21 does not interfere with the main rope 4 at the time of steady raising / lowering, but the main rope 4 collides with the annular inner wall surface in a state where the main rope 4 swings greatly when the telescopic mechanism portion 18 is extended. Is configured to give a vibration damping action.

  The vibration meter 8 for detecting the shaking of the building shown in FIG. 1 has an acceleration detection function in the horizontal direction (x, y direction) orthogonal to each other, and the detection signal from the vibration meter 8 is in the control panel 7. Is transmitted to the calculation unit 22 configured as described above. Based on the horizontal acceleration signal detected by the vibration meter 8, the calculation unit 22 calculates the relative maximum displacement amount under the assumption that the swing of the main rope 4 with respect to the displacement of the hoistway 1 assumed in this elevator apparatus is maximum. It is configured to calculate. The calculation unit 22 calculates the relative maximum displacement amount of the abdomen, which is the maximum amplitude of the main rope 4 swing, and then compares it with a predetermined relative displacement amount threshold value set in advance, and the comparison result is sent to the control operation control unit 23. The control operation control unit 23 that has transmitted the information and configured to perform the control operation of the car 2 according to the comparison result.

  Here, in order to simplify the explanation, the calculation unit 22 calculates the relative maximum displacement amount based on the acceleration signal from the vibrometer 8, and the relative maximum displacement amount of the main rope 4 is a predetermined relative displacement amount threshold, for example, 20 cm. It is determined whether it is less than or greater than that, and the determination signal is transmitted to the control operation control unit 23, and the control operation control unit 23 receiving the determination signal performs two-step control operation, that is, the main rope 4 in the calculation unit 22 When the determination signal that the relative maximum displacement is equal to or less than the predetermined relative displacement threshold described above is received, the control includes including moving the car 2 to a position where the relative maximum displacement of the main rope 4 will be reduced. On the other hand, if a determination signal is received that the relative maximum displacement amount of the main rope 4 in the computing unit 22 exceeds the predetermined relative displacement threshold value, the car 2 is moved to the nearest floor. Evacuate and stop driving It is described as performing a control operation.

  Next, the control operation by the control operation control unit 23 when the vibration meter 8 detects the shaking of the building will be described with reference to the flowchart shown in FIG.

  When the vibrometer 8 constantly monitored in step S1 detects the vibration of the building, the presence or absence of a passenger is detected in step S2, and if there is a passenger, the passenger stops at the nearest floor in step S3. If there are no passengers, do not stop at the nearest floor. In parallel, the calculation unit 22 calculates the relative maximum displacement amount α in step S4 under the assumption that the relative displacement amount in the abdomen of the swing of the main rope 4 is maximized based on the horizontal acceleration signal from the vibrometer 8. It is calculated, and it is determined whether or not the relative maximum displacement amount α calculated in step S5 is a predetermined relative displacement amount threshold value a, for example, 20 cm or less. As a result of this determination, when the relative maximum displacement amount α is equal to or smaller than the predetermined relative displacement amount threshold value a, that is, when the relative maximum displacement amount α of the main rope 4 is relatively small, the control operation control unit 23 that has received the determination signal In step S6, the vibration control operation including moving the car 2 to a position where the relative displacement amount of the main rope 4 is reduced is performed.

  The moving position of the car 2 that reduces the relative displacement amount of the main rope 4 is, for example, the assumption that the car 2 is the maximum as the relative displacement amount in the abdomen of the swing of the main rope 4 is maximum. The length of the main rope 4 when it is located on the lower floor is a position where the length of the main rope 4 is moved in the direction of shortening, more specifically, half the length of the preset main rope 4. The position, or the intermediate floor position that roughly corresponds to it. These positions are not limited to preset positions. When the relative maximum displacement amount α is calculated by the calculation unit 22 described above, the abdomen having the maximum amplitude of the swing of the main rope 4 is calculated at the same time. It may be a position in the vicinity thereof.

  In step S5 described above, the relative maximum displacement amount α of the main rope 4 is compared with the predetermined relative displacement amount threshold value a to detect α ≦ a. However, the relative maximum displacement amount α of the main rope 4 is sufficient. When the vibration control operation is not performed, the lower limit relative displacement amount threshold value when the vibration suppression control operation is not performed is defined as b <α ≦. It is also possible to detect a in step S5.

  Before and after the car 2 is moved to a predetermined position by the vibration suppression control operation, the drive device control unit 20 shown in FIG. 2 receives a signal from the control operation control unit 23 in step S7 and extends to the drive device 19. An operation signal is given. In response to this, the drive device 19 extends, for example, the piston side, expands the pantograph-type telescopic mechanism 18 upward, and moves the damping member 21 further upward. As a result, the main rope 4 swaying in the horizontal direction is damped in a shorter time than when it naturally attenuates while repeatedly colliding with the annular inner peripheral wall of the damping member 21.

  After a predetermined time has elapsed since the calculation by the calculation unit 22 described above, the calculation by the calculation unit 22 is performed again based on the signal from the vibrometer 8, and the relative maximum displacement α of the main rope 4 has become sufficiently small. When this is detected, or when the vibration detection signal from the vibrometer 8 disappears, or when a return signal is given at another timing, this return signal is detected in step S8, and the control operation control unit in step S9 23 is canceled and the normal operation is resumed. At this time, the control operation control unit 23 that has detected the return signal gives a return operation signal to the drive device control unit 20, and the drive device control unit 20 that has received the return signal causes the drive device 19 to move in the reverse direction from the extended state of FIG. The expansion / contraction mechanism 18 is actuated to reduce to a steady state shown in FIG.

  In this way, even when a phenomenon occurs in which the long main rope 4 continues to swing for a long time after an earthquake or the like has converged, the calculation unit 22 can detect a unique phenomenon of the elevator apparatus. For relatively small fluctuations where the relative maximum displacement amount α is equal to or less than the relative displacement amount threshold value a, the main rope 4 can be forcibly controlled in a short time by the above-described vibration control operation, and normal operation is performed. It is possible to reduce the time required to return to

  On the other hand, when it is determined in step S5 that the relative maximum displacement amount α of the main rope 4 from the calculation unit 22 exceeds the predetermined relative displacement amount threshold value a, the vibration suppression control operation of the main rope 4 is performed in the above-described vibration suppression control operation. It is assumed that it is difficult to perform the operation, and the control operation control unit 23 performs the stop control operation in step S10, and evacuates the car 2 to the nearest floor to stop the operation. After that, when the return signal given when the inspection or the like is finished in step S8 is detected, the elevator apparatus is returned to the normal operation.

  In this rest control operation, unlike the previous vibration control operation, the vibration control member 21 in the vibration control device 17 is not moved upward by the telescopic mechanism 18. Therefore, the damping member 21 is located in the vicinity of the end of the main rope 4 on the side of the car 2 and is not damaged due to the influence of the large swing of the main rope 4.

  In the situation where the suspension control operation is performed in step 10, the relative maximum displacement amount α of the main rope 4 calculated by the calculation unit 22 is larger than that in the situation where the vibration control operation is performed. The abdomen may interfere with equipment in the hoistway 1. Therefore, in such a case, the main floor can be controlled to the non-resonant floor near the position of one third of the length of the main rope 4, or one third of the height of the building. It can also be damped by making the rope 4 non-resonant. When the car 2 is located near the middle floor of the building or near half the length of the main rope 4, the natural period of the governor rope 9 or the compen- sion rope 11 having a tension lower than that of the main rope 4 is the primary characteristic of the building. Since it is easy to approach the period or a value close thereto, the governor rope 9 and the compen- sion rope 11 are likely to swing. Therefore, the length of the main rope 4 that is closer to the ground than the vicinity of the middle floor of the building is 3 times longer than the primary natural period of the building or a value close to it, and the time to rescue is shortened when confined. It is desirable to set it to a position of one-third or one-third floor of the building height.

  However, in the suspension control operation in step 10, the speed governor rope 9 and the compen- sion rope 11 can be controlled by other vibration control means, so that it may be another nearest floor set in advance.

  According to such an elevator apparatus, when the relative maximum displacement amount α of the main rope 4 calculated by the calculation unit 22 is equal to or less than the predetermined relative displacement amount threshold value a, the car 2 is moved to a position where the deflection of the main rope 4 is limited. Since the vibration control operation is performed to control the main rope 4 by the vibration control member 21 of the vibration control device 17, the vibration of the main rope 4 is relatively stable even after the vibration of the building is attenuated. Even in a situation where the operation continues for a long time, the main rope 4 can be controlled in a short time using the position of the car 2 and the vibration control device 17 without complicating the configuration, and the normal operation can be resumed. It is possible to shorten the time until it is made. Further, since the vibration damping device 17 that serves as a steady stop for the main rope 4 is disposed at the upper part of the car 2, the relative maximum displacement amount α of the main rope 4 calculated by the calculation unit 22 is a predetermined relative displacement amount threshold value a. Even if it exceeds the upper limit, the vibration damping device 17 does not dampen the swing center of the main rope 4 that swings greatly, but rather dampens the main rope 4 close to the car 2 side. A simple configuration can be obtained.

  In addition, when the vibration damping device 17 is configured, the vibration damping member 21 that suppresses the swing of the main rope 4 is further movable upward by the telescopic mechanism 18, so that the vibration damping control operation is performed in order to control the main rope 4. When the vibration damping member 21 is moved, the vibration damping member 21 is moved to a further upper portion of the car 2 so that the vibration damping member 21 acts at a position slightly away from the vicinity of the fixed end portion of the main rope 4 on the car 2 side. Thus, the swing of the main rope 4 can be more effectively suppressed.

  Moreover, according to the elevator apparatus mentioned above, when the relative maximum displacement amount α of the main rope 4 calculated by the calculating unit 22 exceeds a predetermined relative displacement amount threshold value a, the car 2 is released to the preset nearest floor. Since the control operation is performed, the above-described vibration control is not performed in a situation where the vibration of the main rope 4 cannot be controlled even if the vibration control member 21 at the top of the car 2 is used. The existing structure can be protected without applying excessive vibration or load to the car 2. Further, since it is not necessary to make the vibration damping device 17 strong enough to withstand the same situation, the weight of the car 2 is not increased unnecessarily, and other components of the drive system are not affected. .

  In the above-described embodiment, the predetermined relative displacement amount threshold is set to 20 cm. However, the threshold is not limited to this, and can be arbitrarily set according to the elevator apparatus. In addition, the control operation has been described as performing a two-stage control operation using a single relative displacement threshold value a to distinguish between a vibration control operation and a stop control operation. However, a three-stage control operation may be performed. Is possible. Furthermore, although the calculation part 22 was demonstrated as what was arrange | positioned in the control panel 7, you may comprise in the cover of the vibrometer 8. FIG.

DESCRIPTION OF SYMBOLS 1 Hoistway 2 Passenger car 3 Counterweight 4 Main rope 5 Machine room 6 Hoisting machine 7 Control panel 8 Vibrometer 9 Governor rope 9
DESCRIPTION OF SYMBOLS 10 Speed governor 11 Compen rope 12 Tail cord 13 Shock absorber 14 Bracket 15 Car frame 16 Crosshead 17 Vibration control device 18 Telescopic mechanism part 19 Drive device 20 Drive device control part 21 Damping member 22 Calculation part 23 Control operation control part

Claims (5)

A riding weight that is connected to the main rope so as to be movable up and down, a vibration meter that detects shaking of the building, and a calculation unit that calculates a relative maximum displacement of the main rope based on a detection signal of the vibration meter, In the elevator apparatus having the control operation control unit that performs the control operation based on the result calculated by the calculation unit,
A damping device having a damping member that suppresses the swing of the main rope is provided on the upper portion of the car, and the control operation control unit has a relative maximum displacement calculated by the calculation unit equal to or less than a predetermined relative displacement threshold. When it is detected, the elevator apparatus is configured to perform a vibration control operation including moving the passenger car to a position that restricts the swing of the main rope.   The said damping device has an expansion mechanism which moves the said damping member further to the upper part side of the said car, when performing the damping control operation by the said control operation control part. Elevator device.   The position where the swing of the main rope is restricted to the car is a position near the half of the length of the main rope, an intermediate floor position substantially corresponding to a position of the half of the length of the main rope, and the arithmetic unit The elevator apparatus according to claim 1, wherein the elevator apparatus is any one of the positions near the abdomen that has the maximum amplitude of the swing of the main rope when the relative maximum displacement is calculated.   When the control operation control unit detects that the relative maximum displacement calculated by the calculation unit exceeds a predetermined relative displacement amount threshold value, the control operation control unit performs a pause control operation for evacuating and moving the car to the nearest floor. The elevator apparatus according to claim 1, wherein the elevator apparatus is configured.   5. The elevator apparatus according to claim 4, wherein the nearest floor is a non-resonant floor in the vicinity of one third of the length of the main rope 4 or in the vicinity of one third of the building height. .

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