JP6222570B2 - Governor rope damping device - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a governor rope damping device that suppresses a lateral shake that occurs in a governor rope of an elevator governor.

  Conventionally, when a building rolls due to the influence of strong winds or earthquakes, it has been known that the ropes arranged in the elevator hoistway installed in that building will vibrate in the direction of the building's shaking and roll sideways. Yes. When the natural frequency of the rope in which the lateral vibration occurs coincides with or approximates the natural frequency of the building, the vibration amplitude of the rope further increases due to 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. In addition to the main rope and balancing rope, the “rope” here is wrapped endlessly between the governor sheave and tension sheave of the governor for elevators, and is synchronized with the raising and lowering of the car. The governor rope to run is also included.

  As a countermeasure against the lateral deflection of the governor rope, a technique for suppressing the lateral deflection of the governor rope by applying a resistance force to the vertical movement of the tension sheave accompanying the lateral deflection is disclosed in the following patent document. The vibration damping device described in the patent document connects an attenuator fixed to a pit floor or a position above the pit floor to a weight suspended from a tension sheave, and strokes in conjunction with the vertical movement of the weight. It is configured. According to such a vibration damping device, the resistance force of the attenuator acts as a damping force that attenuates the longitudinal vibration of the weight, and the lateral vibration of the governor rope is suppressed.

  By the way, in order to operate the elevator governor normally, it is necessary to ensure that the governor sheave rotates at a rotational speed corresponding to the car ascending / descending speed. For this reason, the tension sheave and the weight of the weight maintain a tension state in which a necessary tension is applied to the governor rope, and a necessary frictional force is generated between the governor rope and the governor sheave that run synchronously with the car. As a result of being used in such a constant tension state, the governor rope is stretched (hereinafter referred to as “rope stretch”). Specifically, there are “initial elongation” that occurs when the governor rope is installed, and “aging over time” in which the rope length changes over time from the persistence of the tension state.

  When the rope is stretched, the tension sheave and the weight are gradually lowered according to the stretched amount while maintaining the tension of the governor rope. However, when the above-described vibration damping device is provided, if the piston of the attenuator reaches bottom dead center, the tension sheave and the weight are not lowered, and the proper tension state of the governor rope is not maintained. The machine may not work properly. In order to avoid this, the position of the attenuator is periodically adjusted by the coupling device, such as fixing the attenuator to the pit floor via a coupling device that can lower the position of the attenuator according to the rope elongation. Although it is necessary to carry out as part of the maintenance inspection, the work is complicated and is not preferable in terms of installation and maintenance.

  In this regard, Patent Document 1 also discloses an embodiment in which an adjustment mechanism is provided in which the position of the attenuator is automatically adjusted downward in accordance with the rope elongation in order to improve installation and maintenance. This adjustment mechanism has a plurality of step portions that are continuous in a saw-like shape, and includes a shaft member that extends toward the lower side of the attenuator, one end portion engaged with the step portion of the shaft member, and the other end The portion is connected to a spring and includes a locking piece that is rotatably supported. According to such an adjustment mechanism, when the governor rope extends and the attenuator descends, the shaft member pushes the retaining piece and slides downward, while the attenuator ascends to engage the stepped portion of the shaft member. Since it is blocked by the strip, the attenuator is automatically repositioned downward in response to the rope stretch.

  However, the adjustment mechanism described above is further provided with a shaft member on the lower side of the attenuator, and the shaft member descends together with the attenuator, so that the lower end portion of the shaft member does not reach the pit floor. Sufficient space is required below the weight. In order to secure such a space, it is necessary to design the pit floor deeply in advance, and in order to attach it to the existing elevator, it is necessary to dig deeper into the pit floor. It is inevitable that the construction burden on the building side will increase.

JP 59-128182 A JP 2008-013309 A

  In view of the above-described problems, an object of the present invention is to provide a governor rope damping device that can improve installation and maintainability without imposing a burden on a building.

  The present invention relates to a governor rope damping device that suppresses lateral vibration of a governor rope that is wound endlessly between a governor sheave of an elevator governor and a tension sheave positioned below the governor sheave. A cylinder filled with a working fluid, a piston housed in the cylinder and slidable in the axial direction of the cylinder, and a piston connected to the piston and partially protruding from the cylinder An attenuator having a rod, and the axial direction of the attenuator is such that the piston reciprocates relative to the cylinder in conjunction with the vertical movement of the tension sheave accompanying the lateral vibration. It is installed above the tension sheave in a vertical orientation.

  In the governor rope damping device of the present invention, the attenuator has a portion protruding from the cylinder of the piston rod as an upper side, and the lower cylinder is connected to the tension sheave, and the piston is Initially installed so as to be located at the lower end of the slidable area in the cylinder, the axial length of the slidable area is set sufficiently longer than the amplitude of the reciprocating motion. This may be a feature. “Initial installation” here means an installation state of the attenuator immediately after installing the governor rope so that the governor for the elevator operates normally.

  Alternatively, in the governor rope vibration damping device according to the present invention, the attenuator may be configured such that the cylinder is on the upper side and the piston rod on the lower side protrudes from the cylinder and is connected to the tension sheave. Is positioned at the upper end of the slidable area in the cylinder, and the axial length of the slidable area is set sufficiently longer than the amplitude of the reciprocating motion. It is good also as a feature.

  Further, in the governor rope damping device according to the present invention, the length of the slidable area in the axial direction is such that the tension sheave of the tension sheave according to the rope elongation that occurs during the period from the installation of the governor rope to the replacement thereof. It may be characterized by being set longer than the descending amount from the position at the time of initial installation.

  According to the governor rope damping device of the present invention, since the attenuator is provided on the upper side of the tension sheave, the space below the tension sheave (for example, up to the pit floor) for securing the attenuator is secured. Is almost unnecessary. Therefore, the construction burden on the building side is not forced. In addition, since the attenuator is provided in an installation space with sufficient space above the tension sheave, such as the attenuator, the attenuator has a stroke length sufficiently longer than the amplitude of the reciprocating motion of the piston. Can be selected. And, by fixing either the cylinder or piston rod of such an attenuator in the up-and-down direction and connecting the other to the tension sheave, the tension sheave gradually lowered due to the rope elongation due to secular change. However, until the descending amount reaches the stroke length, it is possible to ensure the reciprocating motion of the piston while maintaining the tension state of the governor rope. Become. Therefore, the installability and maintainability of the elevator governor and the vibration damping device are improved.

It is a schematic block diagram of the elevator provided with the damping device of the governor rope which concerns on this embodiment. It is the (a) front view, (b) side view, and (c) schematic plan view which show the governor rope damping device concerning this embodiment. It is an expanded fragmentary sectional view which shows the inside of the attenuator initially installed in the damping device of the governor rope which concerns on this embodiment. It is explanatory drawing which shows the damping operation by the damping device of the governor rope which concerns on this embodiment. It is a schematic explanatory drawing which shows the secular change of the state of the attenuator in the damping device of the governor rope which concerns on this embodiment. It is an expanded fragmentary sectional view which shows the inside of the attenuator initially installed in the damping device of the governor rope which concerns on other embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a governor rope damping device according to the present invention will be described with reference to the drawings. In the following description, the governor rope damping device is simply referred to as a “damping device”, and the elevator governor is simply referred to as a “governor”.

  As shown in FIG. 1, in an elevator 100, a hoisting machine 101 is installed in a machine room at the top of a hoistway. A car 104 is connected to one end of the main rope 103 wound around the drive sheave 102 of the hoisting machine 101, and a counterweight 105 is connected to the other end. When the drive sheave 102 is rotationally driven by a motor (not shown) of the hoisting machine 101, the main rope 103 travels along with this, and the car 104 suspended by the main rope 103 is guided to the guide rail 106. To go up and down in the hoistway.

  Further, the elevator 100 is provided with a speed governor 107 that mechanically detects that the ascending / descending speed of the car 104 exceeds the rated speed. An endless governor rope G is wound between the governor sheave 108 of the governor 107 and the tension sheave 109 positioned below the governor sheave 108. A weight 110 is suspended from the tension sheave 109, and the governor rope G is stretched in a tensioned state in parallel with the main rope 103 due to its own weight. A part of the governor rope G is fixed to an emergency stop lever 111 for operating an emergency stop device (not shown) provided on the car 104 side. Therefore, the governor rope G travels at the same speed as the car 104 in synchronization with the raising and lowering of the car 104. At this time, the speed governor 107 detects the rotational speed of the governor sheave 108 that is rotated at the same speed as the traveling speed of the governor rope G, thereby detecting the excess of the rated speed of the car 104 that is moving up and down.

  In the elevator 100 configured as described above, the vibration damping device 10 of the present embodiment is provided in order to suppress the lateral vibration when the lateral vibration occurs in the governor rope G of the governor 107. The term “lateral shake” as used herein refers to vibration that the governor rope G is periodically displaced in an arbitrary horizontal direction with a state in which the governor rope G is straightly tensioned in the vertical direction as a reference position. Details of the vibration damping device 10 will be described with reference to FIGS. 2 and 3.

  As shown in FIGS. 2 and 3, the vibration damping device 10 includes an attenuator 1 that generates a resistance force for attenuating the vibration energy of the governor rope. The attenuator 1 is provided on the upper side of the tension sheave 109 and applies a resistance force in the opposite direction to the vertical movement of the tension sheave 109 accompanying the lateral swing of the governor rope G.

  The attenuator 1 includes a single-cylinder cylinder 11 having a bottomed cylindrical shape, a piston 12 (see FIG. 3) housed in the cylinder 11, and a piston rod 13 connected to the piston 12. The inside of the cylinder 11 is partitioned by a piston 12 into a first space S1 and a second space S2. The piston 12 is provided with an orifice 14, and the first space S 1 and the second space S 2 in the cylinder 11 communicate with each other through the orifice 14. The first space S <b> 1 and the second space S <b> 2 in the cylinder 11 are filled with working oil 15 that serves as a working fluid that flows in the orifice 14. The piston 12 is provided so as to be slidable in the axial direction of the cylinder 11 and reciprocates relative to the cylinder 11 together with the piston rod 13 in the axial direction. Further, the attenuator 1 has a portion 13 </ b> A (hereinafter, referred to as “projecting portion 13 </ b> A”) in which a part of the piston rod 13 projects from one end portion of the cylinder 11. For this reason, a sealing material (not shown) is provided between the cylinder 11 and the piston rod 13 to prevent the hydraulic oil 15 from leaking out of the cylinder 11.

  In the present embodiment, the attenuator 1 is provided in a posture in which the axial direction of the cylinder 11 is the vertical direction. More specifically, the protruding portion 13A of the piston rod 13 is the upper side, and the upper end portion of the protruding portion 13A is held by the holding bracket 2 positioned above the cylinder 11, while the lower cylinder 11 is It is connected to the tension sheave 109 via a pair of link members 3A and 3B made of a plate-like member connected to the connector 3 attached to the bottom side. Therefore, the direction in which the piston 12 slides in the cylinder 11 coincides with the direction in which the tension sheave 109 moves up and down. Further, the slidable region SR of the piston 12 is from the sliding upper limit position ULP in the cylinder 11 to the sliding lower limit position LLP.

  The holding bracket 2 is fixed to the guide rail 106 by a known rail clip 21. The holding bracket 2 extending from the guide rail 106 is provided with a bent portion 22 (see FIG. 2C) bent so as to avoid the governor rope G. The front end portion of the holding bracket 2 having the bent portion 22 is disposed near the middle portion of the governor rope G that is parallel to each other. A holding portion 23 (not shown in FIG. 2C) that holds the protruding portion 13A of the piston rod 13 is provided at the distal end portion of the holding bracket 2, and the piston rod 13 is fixed so as not to move vertically. . In the present embodiment, the attenuator 1 is suspended from the tip of the holding bracket 2 so that the axis of the cylinder 11 is superimposed on a vertical line passing through the center of gravity of the tension sheave 109.

  A guide bracket 4 is provided below the holding bracket 2. The guide bracket 4 is fixed to the guide rail 106 by the rail clip 41 as in the case of the holding bracket 2 described above. The guide bracket 4 extends from the guide rail 106 to the vicinity of the middle portion of the governor rope G parallel to each other. A guide member 42 having an L-shaped angle having an opening (not shown) through which the link member 3A on one side is inserted is provided at the distal end portion of the guide bracket 4. As the guide member 42 guides the displacement of the link member 3A in the vertical direction, the tension sheave 109 is guided to move up and down. Therefore, the attenuator 1 is configured such that the piston 12 reciprocates relative to the cylinder 11 in conjunction with the vertical movement of the tension sheave 109 accompanying the lateral swing of the governor rope G.

  The attenuator 1 installed in the above-described manner suppresses lateral deflection of the governor rope G by the action of the resistance force that is generated when the piston 12 moves relatively to the sliding lower limit position LLP side as the cylinder 11 moves up. . For example, when the overall length of the governor rope G is about 300 m, the maximum displacement in the vertical direction of the tension sheave 109 assumed in an earthquake or the like is about 10 mm. Therefore, in this case, in order to ensure the vibration damping function by the attenuator 1, the piston 12 may be reciprocated with an amplitude of about 10 mm. Further, at the time of initial installation of the attenuator 1, it is sufficient that a sliding allowance to the sliding lower limit position LLP of the piston 12 is secured at least about 10 mm.

  On the other hand, in the attenuator 1, the sliding allowance up to the sliding upper limit position ULP of the piston 12 becomes an absorption allowance for absorbing the rope elongation generated in the governor rope G. In order to secure as much as possible the absorption allowance, the movable range MRD in the direction in which the cylinder 11 descends is allowed to be as large as possible than the movable range MRU in the direction in which the cylinder 11 rises. desirable. Therefore, the attenuator 1 of the present embodiment is positioned at the lower end portion of the slidable area SR in the cylinder 11 in a state where the reciprocating motion necessary for the piston 12 to exhibit the damping function is ensured. Initially installed.

  Further, in the attenuator 1 of the present embodiment, the length of the slidable area SR (stroke length) of the piston 12 in the axial direction of the cylinder 11 is the reciprocating motion of the piston 12 necessary for exhibiting the vibration damping function. Is set sufficiently longer than the amplitude of. Here, “sufficiently” means that the surplus length obtained by subtracting the amplitude of the reciprocating motion of the piston 12 and the thickness of the piston 12 from the length of the slidable region SR described above is the rope length after the governor rope G is installed. This means that it has at least a length corresponding to the maximum descending amount of the tension sheave 109 corresponding to the rope elongation that occurs during the period up to the time that requires replacement. For example, in the case of the governor rope G having an overall length of about 300 m exemplified above, it is assumed that the extension amount reaches about 800 mm. In this case, the descending amount of the tension sheave 109 from the initial installation position is about 400 mm. Therefore, the attenuator 1 having the surplus length of at least 400 mm may be selected.

  In this regard, in the vibration damping device 10 of the present embodiment, a space with a high degree of freedom extending above the tension sheave 109 is an installation space for the attenuator 1, and thus there is a design restriction regarding the length of the slidable area SR. Equal to almost no. For this reason, even if the attenuator 1 having a sufficiently long stroke length is selected, it is advantageous in that it is hardly subjected to spatial and structural restrictions in its installation.

  However, even if the extension amount of the governor rope G reaches a limit value that requires rope replacement in order to make the best use of the slidable area SR of the piston 12 of the attenuator 1, the weight 110 descends from the initial installation position. It is necessary to provide a clearance that does not reach the pit floor (not shown). In the case of the governor rope G having an overall length of about 300 m exemplified above, the initial installation position of the attenuator 1 is determined so that the separation distance between the weight 110 and the pit floor (not shown) is at least 400 mm. In this way, an appropriate clearance is provided between the weight 110 and the pit floor (not shown), and if an appropriately selected attenuator 1 is initially installed in the form described above, the rope can be replaced after the governor rope G is installed. It is possible to absorb all of the rope elongation generated up to the required time with the attenuator 1.

  The tension sheave 109 to which the attenuator 1 is attached as described above and the weight 110 are connected by a pair of suspension arms 5A and 5B made of a plate-like member. A rotating shaft 109A of the tension sheave 109 passes through an overlapping portion between the pair of suspension arms 5A and 5B and the pair of link members 3A and 3B. A pair of stoppers 6A and 6B made of a U-shaped frame member in plan view are attached to each of the pair of suspension arms 5A and 5B. Each of the stoppers 6A and 6B is disposed near both ends of the contact portion where the governor rope G and the tension sheave 109 are in contact. By providing the stoppers 6A and 6B, the tension sheave 109 is configured to move up and down in accordance with the lateral vibration without causing the governor rope G that has generated lateral vibration to separate from the tension sheave 109.

  Next, the operation of the vibration damping device 10 of this embodiment will be described. First, the vibration control operation when the vibration control device 10 suppresses the lateral vibration of the governor rope G will be described with reference to the drawings.

  When rolling occurs in the building where the elevator 100 (see FIG. 1) is installed due to the influence of an earthquake or strong wind, the hoisting machine 101 and the governor 107 installed on the upper part of the hoistway also roll together with the building. At that time, the vibration energy of the building that rolls is transmitted to the governor rope G through the governor sheave 108 of the governor 107, and the governor rope G is also laterally shaken.

  At this time, the tension sheave 109 is pulled up to the governor rope G as the governor rope G in a tensioned state swings in the horizontal direction from the reference position, and is lifted together with the weight 110 by being guided by the guide member 42. After that, when the governor rope G once returns to the reference position, the tension sheave 109 descends to the original position due to its own weight and the weight 110. However, the governor rope G passes through the reference position and the previous swing direction is When swinging in the opposite direction, it is pulled up again to the governor rope G, guided by the guide member 42 and lifted together with the weight 110. In this way, the tension sheave 109 repeats vertical movement at a vibration period that is twice the vibration period of the governor rope G until the lateral vibration generated in the governor rope G converges.

  Since the attenuator 1 constituting the vibration damping device 10 is connected to the tension sheave 109 in the above-described form, in the attenuator 1, the cylinder 11 is moved up and down in synchronization with the vertical movement of the tension sheave 109, Accordingly, the piston 12 repeats relative reciprocation relative to the cylinder 11 in a very small part of the slidable area SR in the cylinder 11. Here, during the reciprocating motion, the resistance force acting in the direction that prevents the cylinder 11 from being lifted works as a damping force that actively attenuates the vibration energy of the governor rope G that tries to pull up the tension sheave 109. While the resonance magnification of the governor rope G is reduced, the vibration is quickly suppressed.

  In more detail with reference to FIG. 4, when the tension state of the governor rope G is properly maintained (that is, when the governor rope G is at the reference position), it has a movable range MRU for itself to rise. The cylinder 11 at the position (FIG. 4 (a)) rises within the movable range MRU in synchronization with the rise of the tension sheave 109 (FIG. 4 (b)). At this time, when the hydraulic oil 15 passes through the orifice 14 in order to move from the second space S2 in the cylinder 11 to the first space S1, the above-described resistance force is generated. The cylinder 11 thus lifted (FIG. 4B) is lowered to the original position in synchronization with the lowering of the tension sheave 109 (FIG. 4A). As the cylinder 11 repeats such ascending and descending, the vibration energy of the governor rope G is consumed. As a result, the displacement amount when the cylinder 11 ascends gradually decreases and the lateral vibration generated in the governor rope G converges. is there.

  Further, the vibration damping device 10 of the present embodiment maintains the tension state of the governor rope G without requiring any manual maintenance work from the installation of the governor rope G to the time when the rope needs to be replaced. And has the characteristic that the above-described vibration damping function is guaranteed. Hereinafter, the mechanism of the characteristic will be described together with the state in which the state of the vibration damping device 10 changes over time during the period.

  As described above, the governor rope G is normally used in a state in which necessary tension is constantly applied by the weights of the tension sheave 109 and the weight 110. Therefore, it is inevitable that the governor rope G causes rope elongation due to secular change. When the rope stretches in the governor rope G, the position of the tension sheave 109 is naturally lowered in accordance with the extension amount while maintaining an appropriate tension state.

  As shown in FIG. 5, the position at which the protruding portion 13A of the piston rod 13 is held at the tip of the holding bracket 2 is fixed in the up-and-down direction from the initial installation of the attenuator 1 regardless of the occurrence of rope elongation. It has been done. For this reason, the piston 12 connected to one end of the piston rod 13 is not displaced in the vertical direction due to the rope elongation. On the other hand, since the cylinder 11 is connected to the tension sheave 109, when the tension sheave 109 naturally descends due to the rope elongation, the cylinder 11 is also pulled down to the position when it is initially installed (FIG. 5). It gradually shifts downward from (a)). Then, for example, when it is time to replace the governor rope G due to the passage of the service life, as shown in FIG. 5B, as a result of the cylinder 11 descending over time according to the rope elongation, 12 reaches the sliding upper limit position ULP.

  Here, the vibration damping function of the vibration damping device 10 is exhibited when the piston 12 of the attenuator 1 reciprocates relative to the cylinder 11, and the amplitude of the reciprocating movement is the slidable region of the piston 12. It becomes very small with respect to the length of SR. Therefore, in the attenuator 1 having a sufficiently long stroke length as described above, as long as the initial installation is appropriate, the secular movement of the cylinder 11 is always ensured while ensuring the reciprocating motion of the piston 12 necessary for exhibiting the damping function. The piston 12 arrives at the sliding upper limit position ULP along with the lowering. That is, the damping function of the damping device 10 is not impaired until the descending amount of the cylinder 11 (and the tension sheave 109) reaches the stroke length of the attenuator 1.

  Further, even during the time, that is, until the descending amount of the cylinder 11 (and the tension sheave 109) reaches the stroke length of the attenuator 1, even if the rope stretches in the governor rope G, the governor rope G is in an appropriate tension state. While being held, the cylinder 11 is gradually displaced downward together with the tension sheave 109 according to the extension amount. In this way, by utilizing the stroke length of the attenuator 1 to the maximum extent, the rope elongation generated in the governor rope G is absorbed, so that the necessary tension of the governor rope G is maintained, and as a result, the normal and reliable operation of the governor 107 is guaranteed. It is done. In this regard, in the present embodiment, the cylinder 11 is automatically displaced by the respective weights of the tension sheave 109 and the weight 110, so that some artificial adjustment work according to the rope elongation is unnecessary. .

  By the way, the lateral shake of the governor rope G is caused by a natural phenomenon such as a strong wind or an earthquake, and it is virtually impossible to predict the occurrence timing accurately and reliably. However, the damping device 10 of the present embodiment selects the attenuator 1 having a sufficiently long stroke length that can absorb all the rope elongation that occurs during the period from the installation of the governor rope G to the time when the rope needs to be replaced. Even if it is applied, as described above, the vibration control function is not impaired by the secular change in the relative positional relationship between the cylinder 11 and the piston 12, and the occurrence of lateral vibration of the governor rope G, which is the purpose of vibration control, is generated. Since it operates as a trigger itself, there is no risk of loss of function or malfunction. Therefore, maintenance-free operation for the rope elongation is realized until the descending amount of the tension sheave 109 corresponding to the rope elongation reaches the stroke length of the attenuator 1.

  Thus, according to the vibration damping device 10 of the present embodiment, since the attenuator 1 is provided above the tension sheave 109, a space for installing the attenuator 1 is provided below the tension sheave 109 (for example, There is almost no need to secure to the pit floor). Therefore, construction such as deepening the pit floor of the hoistway is unnecessary, and the construction burden on the building side is not forced.

  Further, according to the vibration damping device 10 of the present embodiment, since the attenuator 1 is provided in an installation space having a sufficient space above the tension sheave 109, the above-described piston 12 is used as the attenuator 1. Those having a stroke length sufficiently longer than the amplitude of the reciprocating motion can be selected. In addition, when such an attenuator 1 is provided in a posture in which the axial direction of the cylinder 11 is in the vertical direction, there are hardly any spatial or structural restrictions for the installation. In particular, the attenuator 1 having a stroke length long enough to absorb all the rope elongation that occurs during the period from the installation of the governor rope G to the time when the rope needs to be replaced is selected and installed in the manner described above. For example, the above characteristics can be utilized to realize maintenance-free against rope elongation. Thereby, the installation property and maintainability of the governor 107 and the vibration damping device 10 are improved.

  Furthermore, according to the vibration damping device 10 of the present embodiment, the known attenuator 1 for attenuating the vibration energy of the governor rope G is merely provided on the upper side of the tension sheave 109, and the device configuration is simple. For this reason, troubles such as breakdowns are unlikely to occur, and the workload of periodic maintenance and inspection can be reduced. Also, with respect to the installation mode of the attenuator 1, since known members such as brackets (holding bracket 2 and guide bracket 4) and link members 3A and 3B and existing guide rails 106 can be used well, the configuration of the apparatus is complicated and complicated. Therefore, it is possible to easily cope with retrofitting to an existing elevator 100 at a low cost.

  Moreover, if the attenuator 1 as described above is used, the numerical value setting of the damping coefficient C is adjusted according to the form of the piston 12 and the orifice 14 in addition to the viscosity coefficient (viscosity) of the hydraulic oil 15 filled in the cylinder 11. it can. For this reason, there exists an advantage that the freedom degree regarding the design change of the slidable area SR of the piston 12 according to the expansion amount of the assumed governor rope G is high. Further, if the cylinder 11 employs a so-called single cylinder damper having a simple single layer structure as the attenuator 1, there is an advantage that the rod diameter of the piston rod 13 can be easily increased and the strength can be easily secured.

  In addition, according to the vibration damping device 10 of the present embodiment, the damping function of the attenuator 1 is ensured regardless of the relative positions of the cylinder 11 and the piston 12, and therefore the expected amount of rope elongation generated in the governor rope G Even if the attenuator 1 has a larger slidable area SR than that, it can be used without any problem. Therefore, it depends on the form of the governor rope G (for example, the total length of the rope, the diameter of the rope, the number of wire wires, the manner of winding, etc.) and the usage mode after the installation (for example, the weight of the weight 110, the period until the rope replacement, etc.) It is not always necessary to use the attenuator 1 designed exclusively for different assumed expansion amounts, and it is possible to deal with the speed governor 107 having different application conditions with common parts, which is advantageous in terms of high versatility. It is.

  Although the vibration damping device 10 of the present embodiment has been described above, the vibration damping device according to the present invention can be implemented in other forms.

  For example, in the vibration damping device 10, the attenuator 1 has an upside down posture as long as the direction in which the piston 12 slides in the cylinder 11 matches the direction in which the tension sheave 109 moves up and down. It does not matter if it is installed.

  That is, as shown in FIG. 6, the attenuator 1 has the cylinder 11 on the upper side, and the cylinder 11 is held on the holding bracket 2 positioned above the tension sheave 109 while being fixed in the vertical direction, and on the lower side. The lower end of the protruding portion 13A of the piston rod 13 is connected to the tension sheave 109 (not shown in FIG. 6) via the pair of link members 3A and 3B described above, and the piston 12 slides in the cylinder 11. It may be initially installed so as to be located at the upper end of the possible area SR. In that case, as described above, the length of the slidable area SR of the piston 12 in the axial direction of the cylinder 11 is sufficiently longer than the amplitude of the reciprocating motion of the piston 12 necessary to exhibit the vibration damping function. Thus, the stroke length of the attenuator 1 may be set.

  When the installation posture of the attenuator 1 is turned upside down, the lateral swing of the governor rope G is suppressed by the action of the resistance force that is generated when the piston 12 moves to the sliding upper limit position ULP side. Moreover, the sliding allowance to the sliding lower limit position LLP of the piston 12 at the time of initial installation of the attenuator 1 is an absorption allowance for rope elongation. For this reason, when the installation posture of the attenuator 1 is turned upside down, the initial range is such that the movable range MRD in the direction in which the piston 12 descends is larger than the movable range MRU in the direction in which the piston 12 rises. Install it.

  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, in the above-described vibration damping device 10, an oil damper using the viscous resistance of the hydraulic oil 15 is used as the attenuator 1, but instead of the hydraulic oil 15, a gas such as air or high-pressure gas is used as the working fluid in the cylinder 11. An air damper provided with a piston 12 having a fine orifice while being enclosed in the inside may be applied.

  The above-described attenuator 1 has a structure in which the piston rod 13 protrudes only from one end of the cylinder 11, but as long as the position of the piston 12 in the cylinder 11 is initially installed in the same state as described above, An attenuator in which the rod 13 protrudes from both ends of the cylinder 11 may be used.

  In the attenuator 1 described above, the cylinder 11 has a simple single layer structure, and employs a single cylinder type damper that easily increases the rod diameter of the piston rod 13 and ensures strength. It is also possible to adopt a known double cylinder type damper that constitutes

  In the above-described vibration damping device 10, the attenuator 1 is installed by using the guide rail 106 that guides the raising and lowering of the car 104, but the direction in which the piston 12 slides in the cylinder 11 is the tension sheave. As long as it is installed in the space above the tension sheave 109 in a posture that matches the direction in which the 109 moves up and down, the installation mode is not limited. Although illustration is omitted, for example, when a dedicated guide rail for guiding the vertical movement of the tension sheave 109 is separately provided, the attenuator 1 may be installed using the guide rail.

  The above-described vibration damping device 10 has a configuration including one attenuator 1. However, the number of the attenuators 1 is not particularly limited, and two or more attenuators 1 are provided from the viewpoint of securing strength. It may be a configuration. In that case, each of the plurality of attenuators 1 rotates in line symmetry with a vertical line passing through the center of gravity of the tension sheave 109 as an axis of symmetry, or in plan view so that no imbalance occurs in the vibration damping function. It is desirable to arrange them so as to be rotationally symmetrical about the center.

DESCRIPTION OF SYMBOLS 1 Attenuator 10 Damping device 11 Cylinder 12 Piston 13 Piston rod 13A Protrusion part 15 Hydraulic oil (working fluid)
104 Car 107 Speed governor 108 Governor sheave 109 Tension sheave G Governor rope SR Slidable range

Claims (2)

A governor rope damping device that suppresses lateral swing of a governor rope that is wound endlessly between a governor sheave of an elevator governor and a tension sheave positioned below the governor sheave,
A cylinder filled with a working fluid; a piston housed in the cylinder and slidable in the axial direction of the cylinder; a piston rod connected to the piston and partially protruding from the cylinder; Comprising an attenuator having
The tension sheave has a posture in which the axial direction is the vertical direction so that the piston reciprocates relative to the cylinder in conjunction with the vertical movement of the tension sheave accompanying the lateral vibration. is installed in the upper,
The attenuator is
With the portion protruding from the cylinder of the piston rod as the upper side, the cylinder on the lower side is connected to the tension sheave,
The piston is initially installed so as to be located at the lower end of the slidable area in the cylinder,
The length of the slidable area in the axial direction is sufficiently longer than the amplitude of the reciprocating motion, and the tension sheave according to the rope elongation that occurs in the period from the installation of the governor rope to its replacement. A governor rope damping device, wherein the damping amount is set to be longer than a descending amount from the position at the time of initial installation . A governor rope damping device that suppresses lateral swing of a governor rope that is wound endlessly between a governor sheave of an elevator governor and a tension sheave positioned below the governor sheave,
A cylinder filled with a working fluid; a piston housed in the cylinder and slidable in the axial direction of the cylinder; a piston rod connected to the piston and partially protruding from the cylinder; Comprising an attenuator having
The tension sheave has a posture in which the axial direction is the vertical direction so that the piston reciprocates relative to the cylinder in conjunction with the vertical movement of the tension sheave accompanying the lateral vibration. is installed in the upper,
The attenuator is
With the cylinder as the upper side and a portion protruding from the cylinder of the piston rod on the lower side connected to the tension sheave,
Initially installed so that the piston is located at the upper end of the slidable area in the cylinder,
The length of the slidable area in the axial direction is sufficiently longer than the amplitude of the reciprocating motion, and the tension sheave according to the rope elongation that occurs in the period from the installation of the governor rope to its replacement. A governor rope damping device, wherein the damping amount is set to be longer than a descending amount from the position at the time of initial installation .

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