JP6066067B2 - Resonance reduction device - Google Patents

Description

The present invention relates to a resonance mitigation device for reducing vibrations of an elevator rope or the like due to an earthquake or the like, and an elevator including the resonance mitigation device .

  When an elevator senses shaking such as an earthquake, the elevator guides the car to a predetermined floor of the building and urgently stops its operation, but long objects such as elevator ropes and electrical cables are swayed by an earthquake, etc. Due to resonance. The operation of the elevator is resumed after waiting for such a shake of the long object to sufficiently attenuate. However, long-period vibration of a high-rise building due to an earthquake or the like excessively amplifies the swing of the long object, and the long object may collide with ancillary equipment such as electrical components installed in the elevator hoistway. Thus, if the incidental equipment is damaged, a lot of time is spent on restoring the elevator. In addition, there is a rope damage due to the rope being caught by an accessory device.

  In addition, when a long object swings, the tension applied to the long object fluctuates at a cycle twice that of the long object, causing the car to vibrate up and down. Patent document 1 is disclosing the elevator which provided the restraint apparatus in the car and the counterweight, respectively. The car and the counterweight are guided by the guide rail so as to freely move up and down. However, when the elevator stops urgently, the restraint device locks the car and the counterweight to the guide rail. As a result, since the car and the counterweight remain stationary with respect to the guide rail, the slack of the long object does not occur and an effect of suppressing the shake of the long object can be expected.

  However, while the elevator senses shaking such as an earthquake and guides the car, the long object may resonate with the building and the long object may become slack. At this time, if the car and the counterweight are locked to the guide rails, the swing of the long object is amplified while the long object is slackened.

JP 2007-284217 A

The present invention has been made in view of the above circumstances, and a resonance mitigation device that can satisfactorily reduce the vibration of a long object under any situation where a car and a counterweight are stopped, and an elevator including the resonance mitigation device The purpose is to provide.

The present invention relates to a resonance reduction provided in the car of an elevator comprising suspension means in which a rope joined to a car and a counterweight is wound around a sheave, and a guide member that guides the car so that the car can be raised and lowered. A pair of friction materials, a pair of levers provided so that the pair of friction materials face each other, and one of the pair of levers rotatably supported, and the other In a direction that pivotally supports the lever in a posture intersecting with the one lever and that extends in the vertical direction, and is connected to the pair of levers and opens and closes between the pair of friction materials, A drive source that rotates the pair of levers around the support shaft, a base that supports the drive source, and a drive source that is interposed between the drive source and the base. Spherical that can move along Comprising a wheel, the said shaft, as well is fixed to the car, the driving source, through the pair of levers, be provided swingably about said shaft, said guide member Is disposed between the pair of friction materials, and the drive source rotates the pair of levers so that the gap between the pair of friction materials is closed. When the pair of friction materials connected to the car is pressed against the guide member with the guide member interposed therebetween, and the rope is accelerated in the direction in which the rope is shaken, the car is caused by a variation in tension generated in the rope. The operation of moving up and down is braked by a frictional force in which the friction material slides into contact with the guide member.

Further, the present invention provides the counterweight of an elevator comprising suspension means in which a rope joined to a car and a counterweight is wound around a sheave, and a guide member that guides the car so that the car can be moved up and down. And a pair of levers provided so that the pair of friction materials face each other, and one of the pair of levers is rotatably supported. In addition, a vertically extending support shaft that rotatably supports the other lever in a posture intersecting the one lever, and the pair of levers are connected to open and close the pair of friction materials. A drive source that rotates the pair of levers around the support shaft, a base that supports the drive source, and a drive source that is interposed between the drive source and the base. Along the top surface of It comprises a spherical wheel to rotatably, and the support shaft together with is fixed to the counterweight, the drive source, via a pair of levers, swingably provided around the support shaft In the state where the guide member is disposed between the pair of friction materials, the drive source rotates the pair of levers so that the pair of friction materials are closed, When the guide member is sandwiched between a pair of friction materials, the pair of friction materials connected to the counterweight are pressed against the guide members, respectively, and when the rope is accelerated in the direction in which the swing occurs, The operation of raising and lowering the counterweight due to the fluctuation of the generated tension is braked by a frictional force with which the friction material slides into contact with the guide member.

In the resonance mitigation device according to the present invention having the above- described configuration, the drive source includes a body portion, a solenoid coil provided in the body portion, and a portion protruding from one end of the body portion. An output rod that is pulled inwardly of the body when energized, one of the pair of levers, one on the projecting portion of the output rod, the other on the body, It is characterized in that it is rotatably connected via a smooth joint .

Moreover, the resonance mitigation device according to the present invention is characterized in that the pair of levers are provided with slides that rotatably support the friction material around a vertical axis .

For example, when a vibration due to an earthquake or the like occurs in a building, a tension that raises and lowers the car and the counterweight is generated on the rope that suspends the elevator car and the counterweight installed in the building. According to the resonance mitigation device and the elevator of the present invention after an elevator that has sensed a shake such as an earthquake has stopped urgently, the friction material respectively connected to the car and the counterweight is pressed against the guide member, and the car and the counterweight are The operation of moving up and down can be braked by the frictional force in which the friction material slides into contact with the guide member, thereby reducing the shake of the long object.

  In addition, the raising and lowering movement of the car and the counterweight is permitted within a range in which the friction material slides with respect to the guide member. Therefore, a slacked long object may shake greatly immediately before the elevator stops emergency. However, in this state, the car and the counterweight are not locked to the guide member, and the factor that impedes the attenuation of the swing of the long object is eliminated. Moreover, the sliding contact of the friction material with the guide member consumes the kinetic energy that the long object shakes due to the inertial force, further shortening the time to attenuate the vibration of the long object, This will also contribute to shortening the elevator recovery time.

  Further, the resonance reducing device of the present invention supports a pair of friction materials opposed to each other by a pair of levers, and a pair of levers are rotated by a drive source so that a pair of the friction materials are closed. The guide member disposed between the friction materials can be sandwiched between the pair of friction materials. Here, the lever is not particularly limited as long as it can be rotated about a shaft or the like fixed to the car and the counterweight, and the stroke of the friction material around the fulcrum is relatively long. The car and the counterweight may sway in the horizontal direction, and the relative position of the guide member may be shifted to one of the pair of friction materials. Even in such a situation, there is little fluctuation in the force with which the drive source presses the pair of friction materials against the guide member, and there is an advantage that the friction force with which the friction material slides into contact with the guide member can be maintained at a desired magnitude.

  Furthermore, since the resonance reducing device of the present invention rotatably supports a pair of levers crossing each other on a single spindle, in addition to the above advantages, the number of components is small and the structure is simple. In addition, since the pair of levers can rotate about the single support shaft, the directions of the force by which the pair of friction materials press the guide members are opposite to each other in the circumferential direction of the support shaft. There is no escape in the radial direction. For this reason, as described above, even if the relative position of the guide member is shifted to any one of the pair of friction materials, the pair of levers guide the pair of friction materials without wasteful output of the drive source. It can be transmitted as a force for pressing the member.

  Furthermore, the resonance mitigation device of the present invention includes a sliding node that rotatably supports the friction material around the vertical axis on the pair of levers, regardless of the angle at which the friction material is pressed against the guide member by the lever. When the pair of friction materials are pressed against the guide member, the pair of friction materials can be maintained in a fixed posture with respect to the guide member. This is advantageous in bringing the friction member of the guide member into contact with each other when the portion where the friction member is pressed and the portion of the friction material opposed to the portion are flat.

The side view of the elevator which shows the example of installation of the resonance reduction apparatus which concerns on embodiment of this invention. The side view of the resonance reduction apparatus which concerns on embodiment of this invention. 1 is a plan view of a resonance reducing device according to an embodiment of the present invention. The top view which shows the operation example of the principal part of the resonance reduction apparatus which concerns on embodiment of this invention. (a), (b) is a top view explaining the effect | action of a pair of lever applied to the resonance reduction apparatus which concerns on embodiment of this invention. The top view of the principal part of the resonance reduction apparatus which concerns on other embodiment of this invention.

  1 includes suspension means 11 in which a rope 5 joined to a car 1 and a counterweight 3 is wound around sheaves 7 and 9, and a guide member 13 that guides the car 1 and the counterweight 3 so as to be movable up and down. An elevator 15 is shown. The resonance mitigation device 17 according to the embodiment of the present invention may be provided in both the car 1 and the counterweight 3 of the elevator 15. However, if the resonance mitigation apparatus 17 is provided in at least one of the car 1 or the counterweight 3, The effects of the invention can be achieved.

  The suspension means 11 may be anything that moves the car 1 and the counterweight 3 up and down or stops according to the rotation or stop of the sheave 7 by an electric motor or the like. The sheaves 7 and 9 are supported by bearings 21 and 23 installed in the building 19 at a position higher than the upper limit of the upward and downward stroke of the car 1 and the counterweight 3. The guide member 13 shows four guide rails 25 extending in the vertical direction, but the arrangement, number, shape, or structure for fixing the guide rails 25 to the building 19 is a design matter that can be changed as appropriate. . The long object described below is a name that controls the balance rope 27 and the electric cable not shown in the figure in addition to the rope 5 of the elevator 15.

  The resonance reducing device 17 presses the friction material 29 against the guide rail 25 when the car 1 and the counterweight 3 are moved up and down due to an earthquake or the like, and the friction material 29 slides on the guide rail 25 to generate a frictional force. The car 1 and the counterweight 3 are braked respectively. Details are described below.

  As shown in FIGS. 2 and 3, the resonance reducing device 17 includes a pair of friction materials 29 facing each other, a pair of levers 31 and 33 to which the pair of friction materials 29 are respectively attached, and the levers 31 and 33 are rotatable. And a drive source 37 that rotates the levers 31 and 33 in the direction of the arrow θ so that the pair of friction materials 29 are opened and closed.

  The levers 31 and 33 have postures that cross each other, and the longitudinal directions of the levers 31 and 33 overlap each other. An arrow θ indicates the circumferential direction of the support shaft 35. The support shaft 35 is a pin in which a screw formed at the lower end of the support shaft 35 is screwed into a holder 41 fixed to the base 39, and penetrates the overlapping portions of the levers 31 and 33 in the vertical direction. Two washers 43 sandwiching the levers 31 and 33 from above and below are attached to the support shaft 35. A ball bearing 45 is interposed between the support shaft 35 and the washer 43. The base 39 is fixed to the upper surfaces of the car 1 and the counterweight 3 by using bolts or the like, with leg members 47 extending downward.

  One end of the lever 31 is provided with a slide 51 that rotatably supports the friction material 29 around a pin 49 that is a vertical axis, and a slide 53 that is connected to the drive source 37 is provided at the other end. The smooth joint 51 has one end of the lever 31 and a movable piece 55 connected to the friction material 29 penetrated by a pin 49, and a nut 57 is fastened to a screw formed at the lower end of the pin 49. The movable piece 55 is rotatably held. As the friction material 29, a sintered metal formed into a plate shape or a highly elastic material may be applied. Further, it is preferable to provide a torsion spring or the like on the slide 51 and keep the direction of the friction material 29 parallel to the guide surface 59 of the guide rail 25 shown in FIG. 3 by this elastic force. As with the lever 31, the lever 33 is provided with smooth joints 51 and 53.

  The drive source 37 is a solenoid that pulls the output rod 63 inward of the body 61 when the solenoid coil built in the body 61 is energized. The output rod 63 is urged in a direction protruding from the body portion 61 by a return spring 65 that spans between the lever 31 and the body portion 61 of the drive source 37. Reference numeral 67 denotes a spherical wheel that supports the drive source 37 on the base 39 and can move freely along the upper surface of the base 39.

  The joint 53 of the lever 31 penetrates the connecting piece 69 joined to the other end of the lever 31 and the output rod 63 with a pin 71, and a nut 73 is fastened to a screw formed at the lower end of the pin 71. The connecting piece 69 is rotatably held between the two. The joint 53 of the lever 33 has the same structure as the joint 53 of the lever 31 except that the connecting piece 75 joined to the body 61 of the drive source 37 is rotatably held.

  Next, a method for reducing the resonance of the elevator 15 by the resonance reducing device 17 will be described. The drawings refer to FIG. 1 unless otherwise noted. When the elevator 15 is operating normally, as shown in FIG. 3, the levers 31 and 33 receive the elastic force of the return spring 65, and the pair of friction members 29 rotate in a direction away from the guide rail 25. ing. Further, an acceleration sensor not shown in the drawing provided at an appropriate position of the elevator 15 or the building 19 can detect the shaking of the elevator 15 or the building 19.

  For example, when a long-period vibration due to an earthquake or the like occurs in the building 19, the long object of the elevator 15 is accelerated in the direction in which the swing occurs, and tension is generated on the rope 5 to move the car 1 and the counterweight 3 up and down. . The above-mentioned acceleration sensor detects a shake such as an earthquake and sends a detection signal. The control device not shown in the figure for controlling the operation of the elevator 15 is configured to connect the car 1 and the counterweight 3 based on the detection signal of the acceleration sensor. Emergency stop.

  Subsequently, a current is supplied from the control device of the elevator 15 to the solenoid coil of the drive source 37, and the drive source 37 pushes the output rod 63 against the elastic force of the return spring 65 as shown in FIG. 4. Tow 61 inward. As a result, the pair of levers 31 and 33 are rotated in a direction to close the pair of friction materials 29, and the pair of friction materials 29 sandwiching the guide member 13 are pressed against the guide surface 59. In this state, the resonance reducing device 17 can brake the operation in which the car 1 and the counterweight 3 are moved up and down by the above-described tension by the frictional force that the friction material 29 slides on the guide member 13.

  Further, since the movement of the car 1 and the counterweight 3 respectively is allowed in the range in which the friction material 29 slides with respect to the guide member 13, a long object that has slackened immediately before the emergency stop of the elevator 15 occurs. Even if there is a large swing, the car 1 and the counterweight 3 are not locked to the guide member 13 in this state, and the factor that impedes the attenuation of the swing of the long object is eliminated. In addition, the sliding contact of the friction material 29 with the guide member 13 consumes kinetic energy that the long object shakes due to the inertial force, further shortening the time to attenuate the vibration of the long object, It will also contribute to shortening the restoration time of later elevators.

  In addition, since the levers 31 and 33 are rotated about the support shaft 35 as a fulcrum, the stroke of the friction material 29 turning around the support shaft 35 is relatively long, and the following advantages are obtained. That is, the car 1 and the counterweight 3 are swung in the horizontal direction indicated by the arrow X, and the relative position of the guide member 13 of the pair of friction materials 29 is as shown in FIGS. 5 (a) and 5 (b). There is a chance to be biased to either. Even in such a situation, the fluctuation of the force with which the drive source 37 presses the pair of friction materials 29 against the guide member 13 is small, and the friction force with which the friction material 29 slides on the guide member 13 is kept at a desired magnitude. Be drunk.

  Furthermore, since the resonance reducing device 17 rotatably supports the levers 31 and 33 crossing each other on the single support shaft 35, in addition to the above advantages, the number of parts is small and the structure is simple. In addition, since the levers 31 and 33 can rotate about the single support shaft 35, the directions of the forces of the pair of friction materials 29 pressing the guide rails 25 are opposite to each other in the circumferential direction of the support shaft 35. The force does not escape in the radial direction of the support shaft 35. For this reason, even if the relative position of the guide rail 25 is shifted to any one of the pair of friction materials 29 as described above, the levers 31 and 33 can output the output of the drive source 37 without waste. The friction material 29 can be transmitted as a force pressing the guide rail 25.

  Further, the resonance reducing device 17 makes the friction material 29 a flat plate shape with respect to the guide surface 59 of the guide rail 25, and ensures a maximum area in contact with the guide surface 59 of the friction material 29. In addition, the respective smooth joints 51 of the pair of levers 31 and 33 press the pair of friction materials 29 against the guide member 13 regardless of the angle at which the pair of friction materials 29 are pressed against the guide member 13 by the levers 31 and 33. At this time, as shown in FIGS. 5 (a) and 5 (b), the pair of friction materials 29 are maintained in a fixed posture with respect to the guide member 13, and the two are brought into close contact with each other.

  It should be noted that the present invention can be carried out 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. The shoe 77 shown in FIG. 1 is indispensable for engaging the car 1 and the counterweight 3 with the guide rail 25, but is not an element constituting the resonance reducing device 17. The resonance reducing device 17 only needs to be connected to each of the car 1 and the counterweight 3 of the elevator 15. The number of resonance reducing devices 17 connected to the car 1 and the counterweight 3 is not limited. The base 39 may be omitted, and the support shaft 35 of the resonance reducing device 17 may be directly fixed to the car 1 and the counterweight 3.

  As shown in FIG. 6, the resonance reducing device 17 may include two support shafts 35 that support the levers 31 and 33, respectively. The sliding joint 51 may be omitted, and the friction material 29 may be directly connected to the levers 31 and 33. As the drive source 37, a hydraulic cylinder or an air cylinder 81 that rotates the levers 31 and 33 according to the advance / retreat of the piston rod 79 may be applied. Alternatively, a rotary solenoid may be applied to the drive source 37.

  The present invention is not limited to an elevator, and is a technique useful for attenuating vibrations of a rope of a cargo handling apparatus that hangs and lifts a load.

  DESCRIPTION OF SYMBOLS 1 ... Car, 3 ... Counterweight, 5 ... Rope, 7, 9 ... Sheave, 11 ... Suspension means, 13 ... Guide member, 15 ... Elevator, 17. .. Resonance reduction device, 19 ... Building, 21, 23 ... Bearing, 25 ... Guide rail, 27 ... Balance rope, 29 ... Friction material, 31,33 ... Lever, 35 ... support shaft, 37 ... drive source, 39 ... base, 41 ... holder, 43 ... washer, 45 ... ball bearing, 47 ... leg member, 49,71. .. Pin, 51, 53 ... Smooth joint, 55 ... Movable piece, 57, 73 ... Nut, 59 ... Guide surface, 61 ... Body, 63 ... Output rod, 65 ... return spring, 67 ... wheel, 69, 75 ... connecting piece, 77 ... shoe, 79 ... piston rod, 81 ... air cylinder.

Claims (4)

Suspension means in which a rope joined to a car and a counterweight is wound around a sheave,
An elevator comprising a guide member that guides the car so as to be movable up and down, and a resonance reducing device provided in the car,
A pair of friction materials;
A pair of levers provided so that the pair of friction materials face each other;
A support shaft extending in the vertical direction that rotatably supports one of the pair of levers and rotatably supports the other lever in a posture intersecting the one lever.
A drive source coupled to the pair of levers and configured to rotate the pair of levers about the support shaft in a direction in which the pair of friction materials open and close;
A base supporting the drive source;
A spherical wheel that is interposed between the drive source and the base and allows the drive source to move along the upper surface of the base;
With
The support shaft is fixed to the car, and the drive source is swingably provided around the support shaft via the pair of levers,
In a state where the guide member is disposed between the pair of friction materials, the drive source rotates the pair of levers in a direction in which the pair of friction materials are closed, thereby the pair of friction materials. The pair of friction materials connected to the car are pressed against the guide members with the guide member interposed between them, and the fluctuation of the tension generated in the rope is accelerated when the rope is accelerated in the direction in which the swing occurs. The apparatus according to claim 1, wherein the lifting and lowering operation of the car is braked by a frictional force in which the friction material slides into contact with the guide member. Suspension means in which a rope joined to a car and a counterweight is wound around a sheave,
An elevator comprising a guide member that guides the car so as to be movable up and down, a resonance reducing device provided in the counterweight,
A pair of friction materials;
A pair of levers provided so that the pair of friction materials face each other;
A support shaft extending in the vertical direction that rotatably supports one of the pair of levers and rotatably supports the other lever in a posture intersecting the one lever.
A drive source coupled to the pair of levers and configured to rotate the pair of levers about the support shaft in a direction in which the pair of friction materials open and close;
A base supporting the drive source;
A spherical wheel that is interposed between the drive source and the base and allows the drive source to move along the upper surface of the base;
With
The support shaft is fixed to the counterweight, and the drive source is provided to be swingable about the support shaft via the pair of levers,
In a state where the guide member is disposed between the pair of friction materials, the drive source rotates the pair of levers in a direction in which the pair of friction materials are closed, thereby the pair of friction materials. The pair of friction materials connected to the counterweight are pressed against the guide members with the guide member interposed therebetween, and when the rope is accelerated in the direction in which the swing occurs, the tension generated in the rope is reduced. Resonance mitigation device characterized in that the operation of raising and lowering the counterweight due to fluctuation is braked by a frictional force in which the friction material slides on the guide member. The drive source is
The torso,
A solenoid coil embedded in the body,
An output rod that has a portion protruding from one end of the body portion and is pulled toward the inside of the body portion when the solenoid coil is energized;
Including
2. The pair of levers, wherein one is connected to the projecting portion of the output rod, and the other is connected to the trunk part via a smooth joint, respectively. Item 3. The resonance reducing apparatus according to Item 2.   The resonance mitigation device according to any one of claims 1 to 3, wherein the pair of levers are provided with slides that rotatably support the friction material around a vertical axis.

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