JP2009062176A - Elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator capable of improving detection accuracy of the position of a tension pulley and securely detecting abnormality occurrence. <P>SOLUTION: The elevator 11 is provided with a car 13 lifted/lowered inside a hoistway 12; a governor 12 for adjusting lifting/lowering speed of the car 13; a governor rope 22 hung around the governor 21; the tension pulley 33 for applying tension to the governor rope 22; a rotating shaft 36 for rotatably supporting the tension pulley 33; a weight 37 connected to the tension pulley 33 and applying load to the tension pulley 33; a regulation control device 39 for regulating the movement of the tension pulley 33 along the axial direction of the rotating shaft 36; and a sensor mechanism 38 for detecting lifting and lowering of the tension pulley 33. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an elevator including a vibration isolator used for a governor tensioner.

  For example, the following is disclosed as an elevator that prevents the governor rope from vibrating. This elevator includes a hoistway. The elevator includes a guide rail arranged along the hoistway, a car guided by the guide rail to move up and down in the hoistway, a hoisting machine arranged above the hoistway and raising and lowering the car And a main rope wound around the hoisting machine. The elevator includes a governor that detects an abnormal speed of the car, and a governor rope that is wound around the governor and connected to the car.

  The elevator includes a tensioning wheel that applies tension to the governor rope, and an arm that is supported at one end by a guide rail and rotatably supports the tensioning wheel by a support shaft provided at the other end. In addition, the elevator accommodates the connecting rod suspended from the support shaft, the receiving plate connected to the lower end of the connecting rod, and the receiving plate, and the receiving plate moves upward from a predetermined position. A box-shaped stopper to be suppressed, and an elastic body provided between the receiving plate and the stopper. The elevator further includes a first detection switch that detects that the receiving plate has moved to an upper position, and a second detection switch that detects that the receiving plate has moved to a lower position. .

In such an elevator, if the governor rope shakes greatly due to an earthquake, the tension wheel is pulled upward. In this elevator, the receiving plate is not blocked by the upper plate of the stopper and is not lifted beyond a certain height. As a result, the arm is prevented from being detached from the guide rail with the momentum of lifting the tension wheel. Further, the car can be stopped by detecting an abnormality with the first detection switch and the second detection switch (see Patent Document 1).
JP-A-10-87228

  By the way, when an earthquake occurs, not only the force in the vertical direction but also the force may be applied in the direction of the support shaft that supports the tensioned vehicle. At this time, the tension wheel vibrates in the direction of the support shaft. In this way, when the tensioning wheel vibrates in the direction of the support shaft and a vertical force is applied to the tensioning wheel and the tensioning wheel moves up and down, avoid the first detection switch or the second detection switch. The backing plate moves up and down. Thereby, when the tension wheel moves up and down, the first detection switch or the second detection switch may not operate.

  An object of the present invention is to provide an elevator capable of improving the detection accuracy of the position of a tensioned vehicle and accurately detecting the occurrence of an abnormality.

  The elevator of the present invention includes a car that moves up and down in a hoistway, a governor that controls the lifting speed of the car, a governor rope wound around the governor, a tension wheel that applies tension to the governor rope, A rotating shaft that rotatably supports the tensioning wheel, a weight that is connected to the tensioning wheel and applies a load to the tensioning wheel, and vibrations in a direction along the axial direction of the rotating shaft of the tensioning wheel. A regulating device for regulating, and a sensor mechanism for detecting ascent and descent of the tensioned vehicle.

  According to the elevator according to the present invention, it is possible to improve the detection accuracy of the position of the tensioned vehicle and accurately detect the occurrence of abnormality.

  Hereinafter, an embodiment of an elevator will be described with reference to FIGS. 1 to 4. In this embodiment, a case where the present invention is applied to a so-called machine roomless elevator will be described as an example.

  As shown in FIG. 1, the elevator 11 includes a hoistway 12. The elevator 11 includes a car 13 that can move up and down in the hoistway 12, a main rope 14 that suspends the car 13 near one end, a hoisting machine 15 around which the middle of the main rope 14 is wound, and a main rope 14 And a counterweight 16 suspended in the vicinity of the other end. The elevator 11 includes a main rail 17 that guides the raising and lowering of the car 13 and a counter rail 18 that guides the raising and lowering of the counterweight 16. The elevator 11 further includes a governor 21 that regulates the speed of the car 13, a governor rope 22 wound around the governor 21, a governor tensioner 23 that applies tension to the governor rope 22, and a pair provided at the bottom of the hoistway 12. And a three-way frame 26 with a built-in control panel 25 for comprehensively controlling the drive of the elevator 11.

  The car 13 includes, for example, a car body 31 and a car lower sheave 32 disposed on the lower side of the car body 31. The hoisting machine 15 is attached to the upper part in the hoistway 12.

  The governor rope 22 has an endless shape and is stretched between the governor 21 and the governor tensioner 23. The governor rope 22 is connected to a part of the car 13 at one place along the way. The governor 21 has a function of shutting off power before the speed of the car 13 exceeds 1.3 times the rated speed, and a governor rope 22 before the speed of the car 13 exceeds 1.4 times the rated speed. A function of restraining and stopping the car 13.

  The governor tensioner 23 is disposed below the hoistway 12. As shown in FIG. 2, the governor tensioner 23 extends from the tension plate 33 that applies tension to the governor rope 22, the mounting plate 34 that is a fixing portion when the tension wheel 33 is mounted on the main rail 17, and the mounting plate 34. In order to detect the ascending and descending of the tensioning wheel 33, the arm 35, the rotary shaft 36 provided on the arm part 35 and rotatably supporting the tensioning wheel 33, the weight 37 attached to the other end of the arm 35. Sensor mechanism 38 and a regulating device 39 that regulates vibration in the direction along the axial direction of the rotation shaft 36 of the tension wheel 33.

  The weight 37 is made of metal and has a square plate shape. The weight 37 extends in parallel with the tension wheel 33. In the present embodiment, for example, two weights 37 are fixed to the arm portion 35 by bolting. The weight 37 is connected to the tension wheel 33 via the arm portion 35 and applies a load to the tension wheel 33. The arm portion 35 can rotate around a bolt 43 serving as a fulcrum provided on the mounting plate 34.

  The sensor mechanism 38 has a first switch 44 for detecting the rising of the tensioning wheel 33 and a second switch 45 for detecting the lowering of the tensioning wheel 33. The first switch 44 and the second switch 45 are contact-type sensors, and can detect that the weights 37 that are detection targets have been raised or lowered by being pushed in. The sensor type used in the sensor mechanism 38 is not limited to this. The sensor mechanism 38 may be a non-contact type sensor.

  As shown in FIGS. 2 and 3, the restriction device 39 includes a pair of restriction pieces 51, a connecting portion 52 that connects the pair of restriction pieces 51, and a support portion 53 that supports the pair of restriction pieces 51 and the connection portion 52. And have. The support portion 53 is formed in a plate shape having a cross-sectional “L” shape. The support portion 53 is fixed to the main rail 17 at the base end, and supports the pair of restricting pieces 51 and the connecting portion 52 at the tip end.

  Both restriction pieces 54 and 55 included in the pair of restriction pieces 51 are each formed in a flat plate shape. More specifically, of the pair of restriction pieces 51, the first restriction piece 54 is configured on the front surface of the support portion 53. Of the pair of regulating pieces 51, the second regulating piece 55 is composed of a fixing member 56 having a “L” cross section. More specifically, the second restricting piece 55 includes a hanging part 56 </ b> A that hangs downward from the upper surface part of the fixing member 56. Further, the connecting portion 52 is configured by an upper surface portion of the fixing member 56. The connecting portion 52 is disposed at a position above the weight 37. The fixing member 56 is fixed to the support portion 53 by, for example, screwing.

  The first restriction piece 54 and the second restriction piece 55, which are a pair of restriction pieces 51, are spaced apart from each other in the thickness direction T of the weight 37. The weight 37 is sandwiched between the first restriction piece 54 and the second restriction piece 55. In a state where the weight 37 is sandwiched between the first restricting piece 54 and the second restricting piece 55, between the weight 37 and the first restricting piece 54, and between the weight 37 and the second restricting piece 55, A slight gap is formed between each of the two.

  Next, with reference to FIGS. 2 to 4, for example, a process of detecting an abnormality when the stretcher 33 is raised or lowered due to the occurrence of an earthquake will be described. For example, when the governor rope 22 is cut due to an earthquake or the like, the tension wheel 33 is lowered by the load of the weight 37. At this time, the weight 37 is also lowered at the same time as the tension wheel 33. On the other hand, the tension wheel 33 and the weight 37 may vibrate in the direction along the axial direction of the rotary shaft 36 due to the influence of the earthquake. In the elevator 11 of this embodiment, even when a force that vibrates in the direction along the axial direction of the rotary shaft 36 is applied to the tension wheel 33 and the weight 37, the vibration is suppressed by the regulating device 39. When the weight 37 is lowered as described above, the weight 37 is lowered while being guided by the pair of restriction pieces 51 of the restriction device 39. As a result, the weight 37 is prevented from being lowered in the direction along the axial direction of the rotary shaft 36 and falling without being detected by the second switch 45.

  The weight 37 that descends while being guided by the pair of restricting pieces 51 pushes the second switch 45 downward. Thus, the second switch 45 detects the position of the weight 37 and sends a detection signal toward the control panel 25. Receiving this signal, the control panel 25 stops the operation of the car 13. Thus, the car 13 can be safely stopped when there is an abnormality due to an earthquake or the like.

  Further, when an earthquake occurs, the governor rope 22 may vibrate, and the governor rope 22 may be caught by a protruding portion in the hoistway 12 or the like. When the movement of the car 13 is continued in this state, the tension wheel 33 is pulled upward. At this time, the weight 37 is pulled upward simultaneously with the tension wheel 33. When the weight 37 rises, the weight 37 rises while being guided by the pair of regulating pieces 51. As a result, it is possible to avoid a situation in which the weight 37 rises while being shifted in the direction along the axial direction of the rotary shaft 36 and the weight 37 is raised without being detected by the first switch 44.

  The weight 37 that rises while being guided by the pair of restricting pieces 51 pushes the first switch 44 upward. The first switch 44 detects the position of the weight 37 and transmits a detection signal toward the control panel 25. Upon receiving this signal, the control panel 25 stops the operation of the car 13. As a result, the car 13 is safely stopped.

  According to the present embodiment, when an earthquake or the like occurs, the function of the restriction device 39 can prevent the tension wheel 33 from shaking in the direction along the axial direction of the rotation shaft 36. Thereby, the raising and lowering of the tension wheel 33 can be accurately detected by the sensor mechanism 38, and the occurrence of the abnormality can be quickly known.

  The present invention is not limited to the embodiment described above. Of course, various modifications can be made without departing from the scope of the invention.

The perspective view which shows the elevator which concerns on embodiment. The perspective view which shows the detail of the governor tensioner shown in FIG. The perspective view which shows the governor tensioner shown in FIG. 2 from a different direction. The front view which shows the structure around the weight of the governor tensioner shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Elevator, 12 ... Hoistway, 13 ... Riding car, 21 ... Governor, 22 ... Governor rope, 23 ... Governor tensioner, 25 ... Control panel, 33 ... Tension wheel, 36 ... Rotating shaft, 37 ... Weight, 38 ... Sensor mechanism , 39 ... restriction device, 44 ... first switch, 45 ... second switch, 51 ... pair of restriction pieces, 52 ... connecting portion, T ... thickness direction

Claims (4)

A car that goes up and down in the hoistway,
A governor that regulates the speed of the car;
A governor rope wound around the governor;
A tensioning wheel for applying tension to the governor rope;
A rotating shaft that rotatably supports the tension wheel;
A weight that is connected to the tension wheel and applies a load to the tension wheel;
A regulating device that regulates vibration in a direction along the axial direction of the rotating shaft of the tensioning wheel;
A sensor mechanism for detecting the rising and lowering of the tension wheel;
The elevator characterized by comprising. The weight has a plate shape extending in parallel with the tension wheel,
The restricting device has a pair of restricting pieces formed in a flat plate shape, and the restricting pieces are arranged separately in the thickness direction of the weight so as to sandwich the weight between them. The elevator according to claim 1. The sensor mechanism is
A first switch that is pushed in by the weight that rises while being guided by the restriction piece as the tensioner is raised;
A second switch pushed by the weight that descends while being guided by the restricting piece as the tension wheel descends;
The elevator according to claim 2, comprising: The restricting device has a connecting portion for connecting the restricting pieces,
The elevator according to claim 3, wherein the connecting portion is disposed at a position above the weight.

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