JP6201871B2 - Dynamic vibration absorber for elevator - Google Patents

Description

  The present invention relates to a dynamic vibration absorber for an elevator, and more particularly, to a dynamic vibration absorber used as a countermeasure against a lateral vibration of a main rope and a balancing rope that are generated in an elevator hoistway.

  Conventionally, when a building rolls due to strong winds, earthquakes, etc., the main ropes and balancing ropes may sway in the direction of the building swing (horizontal direction) in the elevator hoistway installed in the building. Are known. At that time, when the natural frequency of the rope in which the lateral vibration has occurred approaches the natural frequency of the building, the vibration amplitude of the rope is further increased by resonance. If it becomes so, a possibility that a rope may contact or get entangled with the various apparatuses and facilities in a hoistway may increase, and depending on the case, these may be damaged by the impact at the time of contact, etc.

  As an example of such rope vibration countermeasures, the following patent document discloses a technique for suppressing the vibration of the rope by providing a dynamic vibration absorber that absorbs the vibration energy of the rope in which the lateral vibration has occurred in a predetermined position such as near the elevator car. 1 is disclosed. The dynamic vibration absorber includes a plurality of permanent magnets that are opposed to the rope in a non-contact state at all times, one or a plurality of movable rigid bodies to which the permanent magnets are fixed, a damper and a spring coupled to the movable rigid bodies. And an energy absorbing means composed of a damping element made up of and the like. In such a dynamic vibration absorber, the energy absorbing means absorbs the vibration energy of the rope by causing the damping force of the damping element to act on the attractive force of the permanent magnet with respect to the rope, thereby suppressing the vibration of the rope.

  By the way, as described above, the “rolling of a building”, which is the main factor of rope rolls, is caused by strong winds, earthquakes, etc. It is practically impossible to accurately predict in advance the direction of vibration generated and the timing of its occurrence in advance. The same can be said for the direction of the swing of the rope and the degree of the swing width of the rope.

  However, in the above-described dynamic vibration absorber, there is a difference in the strength of the attractive force of the permanent magnet acting on the rope when the rope swings in the directly facing direction with respect to the permanent magnet and when the rope swings in the non-facing direction. As a result, an unbalance occurs in the vibration energy absorption capacity of the rope, and it is difficult to say that a desired vibration suppression effect is obtained uniformly in any direction in the horizontal direction.

JP 2007-309411 A

  The present invention has been made in view of such circumstances, and an object thereof is to provide a dynamic vibration absorber for an elevator that can uniformly suppress the vibration of the rope in an arbitrary horizontal direction against the lateral vibration of the rope. .

  The present invention relates to a dynamic vibration absorber for an elevator that absorbs vibration energy when lateral vibration occurs in a plurality of main ropes that are wound around a drive sheave and suspend a car and a counterweight in an elevator installed in a building. A main rope holding member that holds the main ropes in a state of being bundled together at a position above at least one of the ends of the plurality of main ropes, and a universal joint to the main rope holding member And a plurality of link members that are swingably suspended with the universal joint as a fulcrum, and are coupled to the respective distal ends of the plurality of link members and suspended below the main rope holding member. And an additional mass body.

  In the elevator dynamic vibration absorber according to the present invention, the center of gravity of the main rope holding member and the center of gravity of the additional mass body when the main rope is not laterally shaken are arranged coaxially in the vertical direction. May be added to the feature.

  In the dynamic vibration absorber for an elevator according to the present invention, the additional mass body may be connected to the plurality of link members via a universal joint.

  In the elevator dynamic vibration absorber according to the present invention, the additional mass body includes an annular member that surrounds the plurality of main ropes, and the plurality of link members are connected at regular intervals in a circumferential direction of the annular member. May be added to the feature.

  In the elevator dynamic vibration absorber of the present invention, the natural frequency of the additional mass body when the additional mass body swings while being displaced relative to the plurality of main ropes in the horizontal direction is set in the building. You may add to the characteristic that it was made to correspond with the natural frequency of this building when rolling occurred.

  The dynamic vibration absorber for an elevator according to the present invention includes a stopper provided between the additional mass body and the plurality of main ropes to avoid contact of the additional mass body with the plurality of main ropes. May be added.

  In the elevator dynamic vibration absorber of the present invention, a buffer member may be provided between the additional mass body and the plurality of main ropes.

  Further, according to the present invention, in an elevator installed in a building, a horizontal runout occurs in a plurality of balancing ropes that compensate for weight unbalance of a plurality of main ropes that are wound around a driving sheave and suspend a car and a balancing weight. A dynamic vibration absorber for an elevator that absorbs vibration energy at a time when the balancing ropes are integrally bundled at a position below at least one of the ends of the plurality of balancing ropes. A balance rope holding member to be held, a plurality of link members connected to the balance rope holding member via a universal joint, and suspended in a swingable manner with the universal joint as a fulcrum; and each of the plurality of link members And an additional mass body connected to the tip portion and suspended below the balancing rope holding member.

  According to the dynamic vibration absorber for an elevator of the present invention, the vibration energy of the main rope that absorbs the main rope is absorbed by converting the vibration energy of the main rope in which the lateral vibration has occurred into the vibration energy of the additional mass body, thereby suppressing the lateral vibration of the main rope. can do. Since the additional mass body is provided so as to be swingable in an arbitrary horizontal direction, it is possible to uniformly suppress the lateral swing of the main rope in the arbitrary horizontal direction. In addition, since the “pendulum structure” consisting of a main rope holding member, a plurality of link members, and an additional mass body is adopted, it can be easily installed at low cost for retrofitting existing elevators. It is possible to respond, and work such as maintenance is easy. In particular, since the natural frequency of the additional mass body is determined by the link length of the link member, setting adjustment is relatively simple.

  According to the dynamic vibration absorber for an elevator of the present invention in which the center of gravity position of the main rope holding member and the center of gravity of the additional mass body are arranged coaxially in the vertical direction when the main rope has no lateral vibration. The vibration energy of the main rope in which the lateral vibration has occurred can be transmitted to the additional mass body more smoothly. Thereby, the vibration responsiveness which was excellent in the additional mass body can be exhibited.

  According to the elevator dynamic vibration absorber of the present invention in which the additional mass body is connected to the plurality of link members via the universal joint, when the additional mass body vibrates, the displacement in the vertical direction is suppressed, and the substantially horizontal It can be swung back and forth by displacement in the direction. Thereby, the force applied in the vertical direction when the additional mass body swings is suppressed, and the load applied to the main rope holding member fixed to the plurality of main ropes can be reduced.

  According to the elevator dynamic vibration absorber of the present invention in which the additional mass body includes an annular member that surrounds the plurality of main ropes, and the plurality of link members are connected at a constant interval in the circumferential direction of the annular member. The additional mass body can be displaced in the horizontal direction by a required distance while being arranged in the hollow portion of the annular member. Therefore, the dynamic vibration absorber can function normally even in a hoistway where many restrictions are imposed on the space in the width direction.

  According to the elevator dynamic vibration absorber of the present invention in which the natural frequency of the additional mass body matches the natural frequency of the building, the vibration energy absorption capacity is maximized in a situation where the main rope and the building are most likely to resonate. Function setting can be realized.

  According to the elevator dynamic vibration absorber of the present invention provided with a stopper between the additional mass body and the plurality of main ropes, the additional mass body can be reliably prevented from coming into contact with the main rope. For this reason, the situation where the main rope is damaged or cut due to contact with the additional mass body or the like can be surely prevented, and the safety during the operation of the dynamic vibration absorber is ensured.

  According to the elevator dynamic vibration absorber of the present invention in which the cushioning member is provided between the additional mass body and the plurality of main ropes, even if the large mass occurs so that the additional mass body contacts the main rope or the like, Since the impact at the time of contact is mitigated, the safety during operation of the dynamic vibration absorber is enhanced.

  Further, according to the dynamic vibration absorber for an elevator of the present invention, the vibration energy of the balancing rope is absorbed by converting the vibration energy of the balancing rope in which the lateral vibration has occurred into the vibration energy of the additional mass body. Can be suppressed. Since the additional mass body is provided so as to be swingable in an arbitrary horizontal direction, it is possible to uniformly suppress the lateral swing of the balancing rope in the arbitrary horizontal direction. In addition, a simple structure called a “pendulum structure” composed of a balancing rope holding member, a plurality of link members, and an additional mass body is adopted, so that it can be easily retrofitted to an existing elevator at a low cost. It is possible to cope with the above, and work such as maintenance is easy. In particular, since the natural frequency of the additional mass body is determined by the link length of the link member, setting adjustment is relatively simple.

It is a schematic block diagram which shows the elevator provided with the dynamic vibration damper for elevators which concerns on this embodiment. It is the (a) top view and (b) AA line side sectional view of the dynamic vibration damper for elevators concerning this embodiment. It is the elements on larger scale of the link length adjustment mechanism provided in the link member which comprises the dynamic vibration damper for elevators which concerns on this embodiment. It is explanatory drawing which shows operation | movement of the dynamic vibration damper for elevators which concerns on this embodiment. It is a schematic block diagram which shows the elevator provided with the dynamic vibration damper for elevators which concerns on other embodiment. It is the (a) BB line side sectional view of the dynamic vibration damper for elevators concerning other embodiments, and (b) top view. It is a top view which shows (a) 1st modification of the dynamic vibration damper for elevators which concerns on embodiment of this invention, and (b) 2nd modification.

  Hereinafter, embodiments of a dynamic vibration absorber for an elevator according to the present invention (hereinafter simply referred to as “dynamic vibration absorber”) will be described with reference to the drawings.

  As shown in FIG.1 and FIG.2, the dynamic vibration damper 10 of this embodiment is applied to main rope R1 of the elevator 100 installed in the building not shown. The main rope R1 is a power transmission member for moving the car 101 and the counterweight 102 connected to both ends thereof up and down in opposite directions. In the present embodiment, the main rope R1 is composed of a drive sheave 104 pivotally supported by a hoisting machine 103 installed in the machine room and a metal wire rope wound around the deflector sheave 105. The weight 102 is suspended in a slidable manner. When the drive sheave 104 is rotated around the spindle of the hoisting machine 103, the car 101 and the counterweight 102 are opposite to each other in the hoistway due to the frictional force generated between the drive sheave 104 and the main rope R1. Moved up and down.

  The dynamic vibration absorber 10 of the present embodiment is for absorbing vibration energy when lateral vibration occurs in the main rope R1 in the elevator 100. The term “lateral shake” as used herein refers to vibration that the main rope R1 is periodically displaced in an arbitrary horizontal direction with a reference position as a tensioned state parallel to the vertical line. As shown in FIG. 2, the dynamic vibration absorber 10 of the present embodiment includes a main rope holding member 1 provided at a position above at least one end portion of both ends of the plurality of main ropes R1, and the main rope holding portion. The pendulum structure-type mass adding mechanism includes a plurality of link members 2 connected to the member 1 and an additional mass body 3 connected to each tip portion of the plurality of link members 2.

  The main rope holding member 1 is a structural member for holding a plurality of main ropes R1 in a bundled state at the mounting position. By providing the main rope holding member 1, it is possible to handle the lateral vibration generated in the plurality of main ropes R <b> 1 as one vibration system. The main rope holding member 1 of the present embodiment includes a columnar main body 11, a plurality of through holes 12 that penetrate the main body 11 in the axial direction and through which the main rope R <b> 1 is inserted, and avoid the through holes 12. It is comprised from the block material which has the connection part 13 with each link member 2 provided with two or more. By pressing the outer surface of the main rope R1 inserted through each through-hole 12 provided in the main body 11 with a fastening force of a fastening member (not shown) such as a bolt, the main body 11 and the main rope R1 are firmly attached. It is fixed to.

  Further, in the main rope holding member 1 of the present embodiment, each through hole 12 is arranged so that the center of gravity of each through hole 12 is on the axis of the main body 11. That is, as shown in FIG. 2, the through holes 12 are arranged at the positions of the apexes of the regular pentagon with respect to the five main ropes R <b> 1, and the center of gravity of the regular pentagon is the axis of the main body 11. Is placed on top. Thus, if each through-hole 12 is arrange | positioned so that a gravity center position may be on the axial center of the main body 11, the stability of the main rope holding member 1 at the time of the attachment to main rope R1 will improve. The number of through holes 12 can be appropriately changed according to the number of main ropes R1. For example, when there are four main ropes R1, each vertex of a quadrangle whose diagonal line intersects on the axis of the main body 11 You may implement with the form which has arrange | positioned the through-hole 12 in this.

  The means for fixing the main rope holding member 1 to the main rope R1 is not particularly limited, but it is necessary to be able to secure a fixing strength sufficient to withstand the total weight of a plurality of link members 2 and additional mass bodies 3 described later. That is, it must be possible to maintain the additional mass body 3 suspended in a pendulum shape via each link member 2. As long as such a state can be maintained, the shape, size, material and mass of the main rope holding member 1 are not questioned.

  The link member 2 is a connecting member for connecting the main rope holding member 1 and the additional mass body 3. The link member 2 of the present embodiment is connected to the main rope holding member 1 via a universal joint 21 and is suspended so as to be swingable in an arbitrary direction with the universal joint 21 as a fulcrum. In this embodiment, the universal joint 21 is a ball joint in which a spherical head portion 23 provided at one end of the rod portion 22 constituting the link member 2 is accommodated in the connecting portion 13 of the main rope holding member 1. Has been. That is, as for the ball joint which comprises the universal joint 21, the end of the rod part 22 of the link member 2 comprises a ball stud, and the connection part 13 of the main rope holding member 1 comprises the housing.

  The number of link members 2 is not particularly limited, but is preferably at least 3 or more. Moreover, it is more desirable that the universal joints 21 connected to the link members 2 are arranged at an equal pitch along a circumference centered on the center of gravity of the main rope holding member 1. Thereby, the displacement in the arbitrary horizontal direction of the additional mass body 3 suspended in a pendulum shape is allowed more stably, and the vibration energy of the main rope R1 transmitted to each link member 2 is equalized. be able to. In the present embodiment, the four link members 2 are connected via four universal joints 21 arranged at intervals of 90 ° in the circumferential direction along the peripheral edge portion of the bottom surface of the main rope holding member 1. Yes.

  The length L of the link member 2 is determined according to the assumed natural frequency of the additional mass body 3. That is, the length L of the link member 2 has an important significance as a parameter for determining and adjusting the frequency of the additional mass body 3. This does not change that the additional mass body 3 is a pendulum suspended from the main rope holding member 1, and assuming that the vibration is very small, the frequency of the additional mass body 3 is This is because it is considered that there is no particular problem even if the link member 2 to be suspended is approximately handled as being determined only by the length L and the gravitational acceleration. However, since it is desirable that the frequency of the additional mass body 3 can be appropriately adjusted at the installation site of the dynamic vibration absorber 10, the length L of the link member 2 of the present embodiment is variable as shown in FIG. Link length adjusting means 24 is provided.

  As shown in FIG. 3, the link length adjusting means 24 of the present embodiment uses a long hole 25 provided in the rod portion 22. The rod portion 22 of the link member 2 is formed by joining a plurality of rod members 22a and 22b. Through the through-holes 26 in which the long holes 25 provided in the rod members 22a and 22b overlap each other, for example, a bolt and The rod members 22a and 22b are integrally joined by a fixing member 27 such as a nut. The link length adjusting means 24 fixes the rod member 22b with respect to the rod member 22a in a state where the rod member 22b is appropriately slid along the longitudinal direction of the long hole 25 so that the fixing member 27 can be used. In the range where 26 is formed, the length L of the link member 2 can be appropriately adjusted.

  Returning to FIG. 2, the additional mass body 3 is a vibrator suspended in a pendulum shape below the main rope holding member 1 via a plurality of link members 2. The additional mass body 3 is swung while being displaced in the horizontal direction relative to the main rope R1 by the vibration energy of the main rope R1 transmitted through the main rope holding member 1 and the link member 2. Thus, the vibration energy of the main rope R1 is converted into the vibration energy of the additional mass body 3. At this time, the additional mass body 3 adds inertial mass to the main rope R1.

  In the present embodiment, the natural frequency of the additional mass body 3 when the additional mass body 3 oscillates (vibrates) is used as the natural frequency of the building when the roll is generated in the building where the elevator 100 is installed. To match. Thereby, under the situation where the main rope R1 is most likely to resonate, a function setting that maximizes the vibration energy absorption capability of the dynamic vibration absorber 10 is realized. The situation in which the main rope R1 is most likely to resonate includes, for example, a situation in which the length of the main rope R1 is a value closest to the height of the building. Specifically, a situation is assumed where the car 101 is stopped near the lowest floor of the building. In this case, the natural frequency of each main rope R1 on the car 101 side approaches the natural frequency of the building and resonates. In addition, about each main rope R1 by the side of the counterweight 102 which is not made into the vibration absorption object in this embodiment, a natural frequency approaches the natural frequency of a building and the resonance occurs in the situation where the car 101 is stopped near the top floor. .

  Although the mass of the additional mass 3 does not particularly affect its natural frequency, it needs to have an appropriate mass that can change the vibration energy of the main rope R1. If the mass of the additional mass 3 is too light, not only the vibration energy of the main rope R1 can be absorbed, but also the inertial mass is not sufficiently added to the main rope R1, and the vibration of the main rope R1 cannot be effectively suppressed. The effective function as the dynamic vibration absorber 10 is not fulfilled. On the other hand, if the mass of the additional mass body 3 is too heavy, in addition to increasing the fixing strength required for the main rope holding member 1 and the load applied to the main rope R1, the total load on the car 101 side is increased. Since the mass is increased, there is a risk that the elevator travels. For this reason, the mass of the additional mass body 3 depends on the number of main ropes R1 and the mass thereof, the height of the building where the elevator 100 is installed, etc., taking into account the magnitude of the assumed vibration energy of the main rope R1. Therefore, it is desirable to set as heavy as possible. For example, a weight of about 100 kg is assumed as the mass of the additional mass body 3 when the elevator 100 is assumed to be installed in a building having a height of about 200 m.

  The shape of the additional mass body 3 is not particularly limited. However, the position of the center of gravity of the additional mass body 3 when stationary (that is, when there is no lateral vibration in the main rope R1) is arranged coaxially with the position of the center of gravity of the main rope holding member 1 in the vertical direction. desirable. Thereby, the vibration energy of main rope R1 can be transmitted to additional mass body 3 more smoothly, and the outstanding vibration responsiveness can be exhibited. The additional mass body 3 of the present embodiment is composed of a circular annular member 31 that surrounds the plurality of main ropes R <b> 1, and the plurality of link members 2 are connected at a constant interval in the circumferential direction of the annular member 31. . Each main rope R1 is arranged in the hollow portion 32 of the annular member 31, and the inner peripheral surface (and outer peripheral surface) of the annular member 31 and the outer peripheral surface of the main rope holding member 1 have different diameters in plan view. Are arranged in a concentric circle. By making the additional mass body 3 the circular annular member 31, the additional mass body 3 can be displaced in the horizontal direction by a required distance while the main ropes R1 are arranged in the hollow portion 32. Therefore, the dynamic vibration absorber 10 can function normally even in the hoistway where the space in the width direction has many restrictions.

  Moreover, the additional mass body 3 of this embodiment is connected with each link member 2 via the universal joint 21 similarly to said main rope holding member 1. FIG. More specifically, a ball stud formed of a spherical head portion 23 provided at the distal end portion of the link member 2 and an upper surface of the annular member 31 are provided at equal pitches along the circumferential direction, and each head portion 23 is accommodated. It is integrally connected via a ball joint composed of a housing composed of the connecting portion 33. For this reason, when the additional mass body 3 vibrates, the displacement in the vertical direction is suppressed, and the reciprocating rocking is performed while being displaced in the substantially horizontal direction. Thereby, when the additional mass body 3 rocks | fluctuates, the force added to a perpendicular direction is suppressed and there exists an advantage that the load concerning the main rope holding member 1 fixed to each main rope R1 is reduced.

  Further, in the dynamic vibration absorber 10 of the present embodiment, a stopper 4 for avoiding contact of the additional mass body 3 with each main rope R1 is provided between the additional mass body 3 and each main rope R1. . As shown in FIG. 2, one end portion of each main rope R <b> 1 is connected to an existing longitudinal vibration suppression mechanism 107 provided on the lower side of the upper surface of the car frame 106, and the car 101 is connected via the car frame 106. Hanging. The stopper 4 of the present embodiment is composed of a plurality of protruding members that are erected so as to surround the periphery of each main rope R <b> 1 from the upper surface of the car frame 106. By providing the stopper 4, it is possible to reliably prevent the main rope R <b> 1 from being damaged or cut due to contact with the additional mass 3 or the like, and to ensure the safety when the dynamic vibration absorber 10 is operated.

  Furthermore, in the dynamic vibration absorber 10 of the present embodiment, the buffer member 5 is provided between the additional mass body 3 and each main rope R1. In the present embodiment, a coil spring having one end fixed to the stopper 4 and the other end fixed to the inner peripheral surface of the annular member 31 is employed as the buffer member 5. As a result, even when the additional mass body 3 is so shaken that it comes into contact with the stopper 4, the impact at the time of contact is alleviated, so that the safety during operation of the dynamic vibration absorber 10 is further enhanced.

  Next, operation | movement of the dynamic vibration damper 10 of this embodiment is demonstrated. When rolling occurs in the building where the elevator 100 is installed, the hoisting machine 103 installed in the machine room above the hoistway also rolls together with the building. At that time, the vibration energy of the building that rolls is transmitted to each main rope R1 through the drive sheave 104 (and the deflecting sheave 105) that is pivotally supported by the hoisting machine 103, and the main rope R1 is also laterally shaken.

  The dynamic vibration absorber 10 of the present embodiment is attached to the end portion side of each main rope R1, and the vibration energy of each main rope R1 in which the lateral vibration has occurred is the main rope holding member 1 constituting the dynamic vibration absorber 10. Then, it is finally transmitted to the additional mass body 3 through each link member 2. The additional mass body 3 suspended in a pendulum shape is vibrated by vibration energy transmitted from each main rope R1, and is swung while being displaced relative to the main rope R1 in the horizontal direction. In this way, the vibration energy of each main rope R1 in which the lateral vibration has occurred is converted into the vibration energy of the additional mass body 3, whereby the vibration energy of each main rope R1 is absorbed by the dynamic vibration absorber 10.

  Here, in the dynamic vibration absorber 10 of this embodiment, since the main rope holding member 1 is fixed to each main rope R1, it always vibrates with the same period as each main rope R1, but the additional mass 3 is a universal joint. Since the suspension is suspended in a pendulum shape by a plurality of link members 2 connected to the main rope holding member 1 via 21, the period is basically different from each main rope R <b> 1 (and the main rope holding member 1). Vibrate. Further, even if the same period of vibration is generated, each main rope R1 and the additional mass body 3 vibrate in different phases. At this time, an inertia mass is added to each main rope R1 by the additional mass body 3 that oscillates (vibrates), so that a force opposite to the swing direction of each main rope R1 acts. The vibration of R1 is suppressed.

  In the dynamic vibration absorber 10 of the present embodiment, each main rope R1 and the building are most likely to resonate by matching the natural frequency of the additional mass 3 with the natural frequency of the building where the elevator 100 is installed. Below, the function setting in which the vibration energy absorption capability by the dynamic vibration absorber 10 is exhibited to the maximum is realized. This will be described in detail below.

  When the car 101 is standing by near the lowest floor of the building and the building rolls, the length of each main rope R1 on the car 101 side and the height of the building are relatively close to each other. Therefore, each main rope R1 vibrates in the horizontal direction at a frequency close to the natural frequency of the building. If the scale and transition of the rolling of the building are determined and it is determined that the growth of the vibration of the main rope R1 cannot be overlooked, the operation shifts to control operation, and the car 101 is moved to a specific evacuation floor.

  Since the vibration energy of the vibration generated in each main rope R1 is converted into the vibration energy of the additional mass body 3 as described above, the additional mass body 3 is vibrated by the vibration energy transmitted from each main rope R1. Then, it is swung (vibrated) while being displaced relative to the main rope R1 in the horizontal direction. At this time, since the additional mass body 3 vibrates at the same frequency as the natural frequency of the building, the frequency of the additional mass body 3 and the frequency of each main rope R1 are close to each other. The vibration and the vibration of the additional mass body 3 have a substantially opposite phase relationship. Therefore, most of the exciting force in the deflection direction applied to each main rope R1 is canceled by the action of the inertial mass that the additional mass body 3 adds to each main rope R1.

  FIG. 4 shows the apparent behavior of the dynamic vibration absorber 10 in such a situation. As shown in FIGS. 4A and 4B, the additional mass body 3 repeats reciprocating oscillation (vibration) while being relatively displaced in the horizontal direction with respect to each main rope R1. On the other hand, the vibration in the horizontal direction of each main rope R1 is canceled by the inertial mass added to each main rope R1 by the additional mass body 3, and is suppressed to such a level that it can be called fine vibration. This means that most of the vibration energy caused by the lateral vibration generated in each main rope R1 is converted into the vibration energy of the additional mass 3 as it is. In this way, the function of the dynamic vibration absorber 10 is maximized, and most of the vibration energy of each main rope R1 is absorbed by the dynamic vibration absorber 10.

  Moreover, as described above, the dynamic vibration absorber 10 of the present embodiment is configured to allow displacement in an arbitrary horizontal direction with respect to the additional mass body 3 suspended in a pendulum shape on the main rope holding member 1. Yes. Therefore, even if the roll generated in the building where the elevator 100 is installed is in any direction, the vibration energy absorption capacity is not uneven, and the horizontal swing of the main rope R1 in an arbitrary horizontal direction is uniformly suppressed. Is possible.

  As described above, according to the dynamic vibration absorber 10 of the present embodiment, by suppressing the lateral vibration of the main rope R1, the condition for the elevator 100 to shift to the control operation when the building rolls can be reduced. The recovery time until the operation of the elevator 100 is resumed and the waiting time at the evacuation floor can be shortened. Further, the dynamic vibration absorber 10 employs a very simple configuration called “pendulum structure” composed of the main rope holding member 1, the plurality of link members 2, and the additional mass body 3. For this reason, it is possible to easily cope with retrofitting to an existing elevator 100 at a low cost, and maintenance and the like are also easy. In particular, since the natural frequency of the additional mass 3 is determined by the link length of the link member 2, setting adjustment is relatively simple.

  Moreover, since the dynamic vibration absorber 10 of this embodiment is a so-called passive type, it does not require a trigger for controlling and operating the power as well as the electric power, and the phenomenon that is the object of vibration absorption (that is, the main rope R1) If this occurs, there is also an advantage that it operates naturally in response thereto. Therefore, for example, even under a power outage or the like, it is possible to reliably exert the desired vibration absorbing function, and it is possible to reliably suppress the lateral vibration of the main rope R1, which is extremely difficult to predict the occurrence timing. It is possible to do. In addition, the passive dynamic vibration absorber 10 is less likely to break down, and is excellent in installation.

  As mentioned above, although the dynamic vibration damper 10 of this embodiment was demonstrated, the dynamic vibration absorber which concerns on this invention can also be implemented with another form. In other embodiments and modifications thereof described below, detailed descriptions regarding configurations substantially common to the dynamic vibration absorber 10 are omitted as appropriate.

  For example, as shown in FIG.5 and FIG.6, when the elevator 200 is provided with the balance rope R2, you may apply the dynamic vibration absorber 20 to the balance rope R2. The balancing rope R2 is a compensation member for compensating for the weight imbalance of the main rope R1 caused by the positional relationship between the car 101 and the balancing weight 102. In this elevator 200, the balancing rope R2 is composed of a metal wire rope, like the main rope R1, with one end of each wire rope connected to the car 101 and the other end connected to the counterweight 102. It is suspended. Further, the balancing rope R2 is provided below the hoistway and is hung on a moving pulley 201 disposed so as to be movable up and down along a guide rail (not shown). Tension is maintained.

  The dynamic vibration absorber 20 of this embodiment is for absorbing vibration energy when lateral vibration occurs in the balancing rope R2 in the elevator 200. The dynamic vibration absorber 20 includes a balancing rope holding member 6 provided at a position below at least one of the both ends of the balancing ropes R2, and a plurality of balancing rope holding members 6 connected to the balancing rope holding member 6. The pendulum structure-type mass addition mechanism includes a link member 2 and an additional mass body 3 connected to the tip ends of the plurality of link members 2.

  The balancing rope holding member 6 is basically the same configuration as the main rope holding member 1 except that the balancing rope holding member 6 is fixed below the car 101 and the object to be bundled is a plurality of balancing ropes R2. It is. That is, the balance rope holding member 6, the link members 2 and the additional mass body 3 constituting the dynamic vibration absorber 20, and the main rope holding member 1, the link members 2 and the additional mass body constituting the dynamic vibration absorber 10 described above. 3 has substantially the same configuration. Therefore, in the dynamic vibration absorber 20 as well, as in the case of the dynamic vibration absorber 10, the additional mass body when the additional mass body 3 swings while being relatively displaced in the horizontal direction with respect to the plurality of balancing ropes R2. It is desirable to match the natural frequency of 3 with the natural frequency of the building when the rolling occurs in the building where the elevator 200 is installed.

  The dynamic vibration absorber 20 is not provided with a configuration corresponding to the stopper 4 described above, and a buffer material is provided as the buffer member 5 on the inner peripheral surface of the annular member 31 constituting the additional mass body 3. . Since the dynamic vibration absorber 20 does not have the stopper 4, the buffer member 5 is made of an elastically deformable material (for example, rubber, foamable or porous polymer polymer, etc.) having excellent buffer performance and restoring force after deformation. It is preferable to use it. This is because even if the additional mass 3 comes into contact with the balancing rope R2, damage to the balancing rope R2 is reduced. Even if the balancing rope R2 is cut by contact with the additional mass body 3, there is no situation in which the car 101 or the dynamic vibration absorber 20 immediately falls. Therefore, the dynamic vibration absorber 20 has the advantage that the safety requirements are alleviated even when compared with the dynamic vibration absorber 10 described above, and the device configuration can be further simplified.

  The mechanism during operation of the dynamic vibration absorber 20 is the same as that of the dynamic vibration absorber 10 described above. Moreover, the dynamic vibration absorber 20 makes each balancing rope R2 and the said building resonate most by making the natural frequency of the additional mass body 3 correspond with the natural frequency of the building where the elevator 200 is installed. In an easy-to-understand situation, it can function so as to maximize its vibration energy absorption ability. The situation where each balancing rope R2 and the building are most likely to resonate includes, for example, a situation where the car 101 is waiting near the top floor of the building. In such a situation, when the building rolls, the length of each balancing rope R2 on the car 101 side and the height of the building are relatively close to each other, so each balancing rope R2 is unique to the building. This is because it vibrates in the horizontal direction at a frequency close to the frequency.

  Also in the dynamic vibration absorber 20, it is possible to uniformly suppress the lateral vibration of the balancing rope R <b> 2 in an arbitrary horizontal direction, and at the same time, the dynamic vibration absorber 10 described above is also a passive type. And in common. Therefore, the same function and function as the above-described dynamic vibration absorber 10 can be obtained, and the same effect as that obtained by the dynamic vibration absorber 10 can be obtained.

  In the above description, the dynamic vibration absorbers 10 and 20 according to the embodiments of the present invention are illustrated on the car 101 side. However, as shown in FIGS. 1 and 5, the dynamic vibration absorber 10 is provided. , 20 can be installed on the main rope R1 and the balance rope R2 on the counterweight 102 side. In that case, the situation where the vibration energy absorbing ability of each of the dynamic vibration absorbers 10 and 20 is maximized is the opposite of the situation when it is installed on the car 101 side. That is, when the dynamic vibration absorber 10 is installed on the counterweight 102 side, the vibration energy absorption capacity is exhibited to the maximum when the car 101 is waiting near the top floor of the building. Similarly, when the dynamic vibration absorber 20 is installed on the counterweight 102 side, the vibration energy absorption capacity is exhibited to the maximum when the car 101 is waiting near the lowest floor of the building. .

  The present invention can be implemented in a mode in which various improvements, modifications, or variations are added based on the knowledge of those skilled in the art without departing from the spirit of the present invention. Moreover, you may implement with the form which substituted any invention specific matter to the other technique within the range which the same effect | action or effect produces.

  For example, as shown in FIG. 7A, the number of the link members 2 is arbitrary as long as the additional mass body 3 suspended from the main rope holding member 1 can be connected so as to be swingable in an arbitrary horizontal direction. Further, the shape and number of the stoppers 4 are not particularly limited. For example, you may provide the stopper 4 comprised from the projection member which curves in circular arc shape so that the circumference | surroundings of each main rope R1 may be enclosed. In this case, it is desirable to provide the same buffer member 5 used in the dynamic vibration absorber 20 on the outer surface side of the stopper 4. Furthermore, if the stopper 4 is configured in a concentric circular arc shape with the inner peripheral surface of the additional mass body 3, it is more desirable in that the additional mass body 3 and the stopper 4 (buffer member 5) are in surface contact and the buffer effect is further enhanced.

  In the dynamic vibration absorber 10 described above, as long as the safety aspect at the time of contact between each main rope R1 and the additional mass body 3 can be ensured, the operation can be performed without providing the stopper 4. That is, you may implement with the form which installed the dynamic vibration damper 20 in the main rope R1 side. On the contrary, in order to increase the safety on the balance rope R2 side, the dynamic vibration absorber 20 may be implemented in a configuration in which a configuration corresponding to the stopper 4 is added. In this case, although illustration is omitted, for example, a form in which a protruding member is provided on the lower surface of the balancing rope holding member 6 can be cited.

  In addition to the above-described annular shape (cylindrical shape), the additional mass body 3 is formed in a polygonal ring shape such as a square ring with rounded corners as shown in FIG. 7B, for example. Also good. However, when installing the dynamic vibration absorber of the present invention, the additional mass body 3 is preferably a regular polygonal ring from the viewpoint of easy positioning of the center of gravity. In addition, although illustration is abbreviate | omitted, the additional mass body 3 does not necessarily need to be the member shape | molded integrally, and you may comprise so that the components divided | segmented into multiple may be assembled | assembled integrally. If the additional mass body 3 is divided and assembled, when the dynamic vibration absorbers 10 and 20 are retrofitted to the existing elevators 100 and 200, it is necessary to partially disassemble the peripheral equipment of the car 101 and the counterweight 102. The installation work is simple.

  Moreover, in each embodiment which concerns on the dynamic vibration absorbers 10 and 20 and its modification, although the additional mass body 3 and each link member 2 are all connected via the universal joint 21, universal joint 21 is used. It may be fixed without intervention. This is because even in such a case, the additional mass body 3 repeats periodic oscillation (vibration) like a pendulum.

  Furthermore, the universal joint 21 that connects the main rope holding member 1 (or the balancing rope holding member 6) and each link member 2 does not necessarily have to be an integrally embedded ball joint as described above. As long as the swinging direction of 2 is not limited, other coupling mechanisms can be employed. For example, a Rzeppa type constant velocity joint or the like may be used.

DESCRIPTION OF SYMBOLS 1 Main rope holding member 2 Link member 3 Additional mass body 4 Stopper 5 Buffer member 6 Balance rope holding member 10 Dynamic vibration absorber 20 Dynamic vibration absorber 21 Universal joint 31 Annular member 100 Elevator 101 Car 102 Balance weight 104 Drive sheave 200 Elevator R1 main rope R2 balancing rope

Claims (9)

In an elevator installed in a building, a dynamic vibration absorber for an elevator that absorbs vibration energy when a lateral vibration occurs in a plurality of main ropes that are wound around a drive sheave and suspend a car and a counterweight,
A main rope holding member that holds the main ropes in a state of being bundled integrally at a position above at least one of the ends of the plurality of main ropes;
A plurality of link members connected to the main rope holding member via a universal joint and suspended swingably with the universal joint as a fulcrum;
An additional mass body connected to each of the tip ends of the plurality of link members and suspended below the main rope holding member;
Equipped with a,
The additional mass body swings when a lateral vibration occurs in the plurality of main ropes, and an inertial mass is added to the plurality of main ropes by the swinging additional mass body. elevator dynamic vibration absorber force in the opposite direction is characterized that you action to the direction deflection.   2. The center of gravity of the main rope holding member and the center of gravity of the additional mass body when the main rope is not laterally shaken are arranged coaxially in the vertical direction. The dynamic vibration damper for elevators as described.   The dynamic vibration absorber for an elevator according to claim 1 or 2, wherein the additional mass body is connected to the plurality of link members via a universal joint.   The said additional mass body consists of an annular member surrounding the said some main rope, The said some link member is connected with the fixed space | interval in the circumferential direction of this annular member, The Claim 1 characterized by the above-mentioned. The elevator dynamic vibration absorber according to any one of 3.   The natural frequency of the additional mass body when the additional mass body swings while being displaced relative to the plurality of main ropes in the horizontal direction is determined as the natural frequency of the building when the building rolls. The dynamic vibration absorber for an elevator according to any one of claims 1 to 4, wherein the dynamic vibration absorber is made to coincide with the natural frequency.   6. The apparatus according to claim 1, further comprising a stopper provided between the additional mass body and the plurality of main ropes to prevent the additional mass body from contacting the plurality of main ropes. The dynamic vibration damper for elevators as described in any one.   The dynamic vibration absorber for an elevator according to any one of claims 1 to 6, wherein a buffer member is provided between the additional mass body and the plurality of main ropes. In an elevator installed in a building, the vibration energy when lateral vibration occurs in multiple balancing ropes that compensate for the weight imbalance of multiple main ropes that hang around the drive sheave and suspend the car and the counterweight. A dynamic absorber for an elevator that absorbs,
A balancing rope holding member that holds the balancing ropes in a state of being integrally bundled at a position below at least one of the two ends of the balancing ropes;
A plurality of link members connected to the balancing rope holding member via a universal joint and suspended so as to swing freely with the universal joint as a fulcrum;
An additional mass body connected to each of the tip ends of the plurality of link members and suspended below the balance rope holding member;
Equipped with a,
The additional mass body swings when a lateral swing occurs in the plurality of balancing ropes, and an inertial mass is added to the plurality of balancing ropes by the swinging additional mass body. dynamic vibration absorber for an elevator, characterized that you force acts opposite to the deflection direction of the interleaf rope. The elevator according to claim 8, further comprising a stopper that is provided between the additional mass body and the plurality of balancing ropes and prevents the additional mass body from contacting the plurality of balancing ropes. Dynamic vibration absorber.

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