JP2012246116A - Elevator device, and emergency stop test method thereof - Google Patents

Abstract

An object of the present invention is to reduce the motor torque required during an emergency stop test and to reduce the size of a hoist without depending on the position of a counterweight and without being affected by the length of a shock absorber. It is what.
At the bottom of the hoistway 1, a jack-up device 25 that lifts the counterbalance device 22 is installed. The jack-up device 25 reduces the torque of the motor 5 for causing the sheave 4 to idle by displacing the counterbalance device 22 upward during the operation test of the safety device 14. When the operation test of the emergency stop device 14 is performed, after the car 8 is stopped by the emergency stop device 14, the hoisting machine 3 is operated in a direction in which the car 8 is lowered. At this time, the balancing vehicle device 22 is lifted by the jack-up device 25.
[Selection] Figure 1

Description

  The present invention relates to an elevator apparatus provided with an emergency stop device that engages with a guide rail and makes an emergency stop of a car, and an operation test method for the emergency stop device.

  In general, in the traction type elevator system, when conducting the operation test of the emergency stop device, the rope catch of the governor is operated to stop the car, and then the hoist is operated in the direction in which the car descends. To do. Then, it is determined that the emergency stop device is operating normally by confirming that the car does not descend even if the sheave rotates (the sheave rotates idly).

In this test method, it is necessary to idle the sheave until the hoisting rope completely slips beyond the traction limit of the elevator apparatus. For this reason, if the total mass on the car side is W1, the total mass on the counterweight side is W2, and the traction capability at the traction limit is Γs (gammas), the following conditions are required.
W2 / W1 ≧ Γs (1)

Further, when the diameter of the sheave is D, the torque Ts1 at the sheave portion necessary for generating the rope slip can be obtained by the following equation.
Ts1 = (D / 2) × (W2−W1) (2)

Substituting equation (1) into equation (2) gives the following equation:
Ts1 = (D / 2) × W2 × (1-1 / Γs) (3)

  Therefore, it can be seen that when the total mass on the counterweight side is large, the torque required for idling increases.

  In particular, in a high-lift elevator device in which a balancing rope and a balancing vehicle device are used, the balancing rope has a mass that compensates for the mass of the hoisting rope, and the balancing vehicle device is balanced. In order to maintain the tension of the rope, it has a mass close to that of the balancing rope. For this reason, the total mass W2 on the counterweight side is increased, the torque Ts1 necessary for generating the rope slip is increased, and the motor of the hoisting machine is increased in size.

Here, if the rated mass of the elevator apparatus is CAP, the unbalance torque of the elevator apparatus is calculated as follows (W2 = W1 + 0.5CAP as 50% balance).
T ₀ = (D / 2) × {(W1 + CAP) −W2} = 0.25CAP × D (4)

On the other hand, for example, the shape factor due to the groove shape of the sheave is K2 = 1.25, the coefficient of friction μ between the sheave and the hoisting rope μ = 0.2, and the contact angle between the sheave and the hoisting rope. If θ = 330 °, the following equation is obtained.
Ts1 = (D / 2) × W2 × {1-1 / (e ^{1.25 × 0.2 × (330/180) × π} )}
= 0.763 x W2 x (D / 2) (5)

At this time, if the weight of the car is 1.5 × CAP, W2 = 2.0CAP (actually, the mass of ropes is omitted), so the following equation is obtained.
Ts1 = 0.663CAP × D (6)

In this way, the torque required for the idling of the emergency stop sheave at the time of the test is about three times the unbalance torque T _0, 2 times the unbalance torque to the torque (typically required at the time of acceleration or deceleration of the elevator However, a large amount of motor torque is required only for the emergency stop test.

  On the other hand, in the conventional elevator apparatus, the total weight on the counterweight side is reduced by jacking up the counterweight during the emergency stop test (see, for example, Patent Documents 1 and 2).

JP 2006-168846 A JP 2008-189430 A

  However, the conventional elevator apparatus as described above is limited when the emergency stop test is performed at the position where the counterweight is moved to the lower part of the hoistway, and when the rated speed is high and the shock absorber is long. The jack for jacking up the counterweight becomes considerably long, making it difficult to put it to practical use.

  The present invention has been made to solve the above-described problems. The motor torque required for the emergency stop test is obtained regardless of the position of the counterweight and without being affected by the length of the shock absorber. It is an object of the present invention to obtain an elevator apparatus and an emergency stop test method that can reduce the size of the hoisting machine.

  An elevator apparatus according to the present invention includes a hoisting machine having a sheave and a motor that rotates the sheave, suspension means wound around the sheave, suspended by the suspension means, Cars and counterweights that are lifted up and down, installed in a hoistway, multiple guide rails that guide the raising and lowering of the car and counterweights, and emergency stop that engages the guide rails and makes an emergency stop A flexible balancing rope suspended between a stopper, a cage and a counterweight, and provided at the lower part of the hoistway, and a tensioning rope is wound around the tension rope. In the operation test of the applied balance wheel device and the emergency stop device, the balance wheel device is provided with a balance wheel top moving device that displaces the balance wheel device upward and reduces the torque of the motor for idling the sheave.

  Since the elevator apparatus of the present invention can reduce the torque of the motor for idling the sheave by displacing the balance wheel apparatus upward by the balance wheel moving device during the operation test of the emergency stop device, Regardless of the position of the counterweight and without being affected by the length of the shock absorber, the motor torque required during the emergency stop test can be reduced, and the hoisting machine can be downsized.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the elevator apparatus by Embodiment 1 of this invention. It is a block diagram which shows the elevator apparatus by Embodiment 2 of this invention. It is a block diagram which shows the elevator apparatus by Embodiment 3 of this invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 is a block diagram showing an elevator apparatus according to Embodiment 1 of the present invention. In the figure, a machine room 2 is provided in the upper part of the hoistway 1. In the machine room 2, a hoisting machine 3 is installed. The hoisting machine 3 includes a sheave 4, a motor 5 that rotates the sheave 4, and a brake that brakes the rotation of the sheave 4.

  A baffle 6 is provided in the vicinity of the hoisting machine 3. A plurality of (only one is shown in the figure) hoisting ropes (main ropes) 7 are wound around the sheave 4 and the deflector 6. A car 8 is connected to the first end of the hoisting rope 7. A counterweight 9 is connected to the second end of the hoisting rope 7. The car 8 and the counterweight 9 are suspended by a hoisting rope 7 and are raised and lowered in the hoistway 1 by the hoisting machine 3.

  In the hoistway 1, a pair of car guide rails 10 that guide the raising and lowering of the car 8 and a pair of counterweight guide rails 11 that guide the raising and lowering of the counterweight 9 are installed. A car shock absorber 12 and a counterweight shock absorber 13 are erected on the bottom (pit) of the hoistway 1.

  An emergency stop device 14 is mounted below the car 8. The emergency stop device 14 engages with the car guide rail 10 to stop the car 8 in an emergency.

  In the machine room 2, a governor 15 that detects an overspeed of the car 8 is installed. The governor 15 includes a governor sheave 16, an overspeed detection switch (not shown), and a rope catch 17. An endless governor rope 18 is wound around the governor sheave 16.

  The governor rope 18 is connected to an operating lever of the safety device 14 via a connecting rod 19. A tension wheel 20 around which a governor rope 18 is wound is provided in the lower part of the hoistway 1. The tension wheel 20 is attached to the car guide rail 10.

  When the car 8 is raised and lowered, the governor rope 18 is circulated, and the governor sheave 16 is rotated at a speed corresponding to the traveling speed of the car 8. When the traveling speed of the car 8 reaches the preset first overspeed, the overspeed detection switch is operated, the power supply to the motor 5 is cut off, and the rotation of the sheave 4 is frictionally braked by the brake. The car 8 is stopped suddenly.

  When the descending speed of the car 8 reaches a preset second overspeed (second overspeed> first overspeed), the governor rope 18 is gripped by the rope catch 17 and the governor The circulation of the rope 18 is stopped. As a result, the safety device 14 is mechanically operated via the connecting rod 19, and the car 8 is emergency-stopped by the safety device 14.

  Between the car 8 and the counterweight 9, a plurality of (only one is shown in the figure) counterbalance ropes 21 for compensating the mass of the hoisting rope 7 are suspended. The first end of the balancing rope 21 is connected to the lower part of the car 8. The second end of the balancing rope 21 is connected to the lower part of the counterweight 9.

  At the lower part of the hoistway 1, a balancing wheel device 22 that applies tension to the balancing rope 21 is provided. The balance wheel device 22 has a balance wheel 23 around which a balance rope 21 is wound, and a load weight 24 that can be attached and detached.

  At the bottom of the hoistway 1, a jack-up device 25 is installed as a balancing vehicle upper moving device that lifts the balancing vehicle device 22. The jack-up device 25 reduces the torque of the motor 5 for causing the sheave 4 to idle by displacing the counterbalance device 22 upward during the operation test of the safety device 14. The jack-up device 25 is installed in the hoistway 1 during the operation test of the safety device 14, but can be always installed.

  Next, the emergency stop test method will be described. When the operation test of the safety device 14 is performed, the rope catch 17 is operated and the car 8 is stopped by the safety device 14, and then the hoisting machine 3 is operated in the direction in which the car 8 is lowered. At this time, the balancing device 22 is lifted by a predetermined amount by the jack-up device 25. Then, it is determined that the emergency stop device 14 is operating normally by confirming that the car 8 does not descend even if the sheave 4 rotates (the sheave 4 rotates idly).

  In this test method, it is necessary to idle the sheave until the hoisting rope 7 completely slips beyond the traction limit of the elevator apparatus. Further, the torque Ts1 in the sheave 4 necessary for generating the rope slip is obtained by the above-described equation (3).

At this time, the total mass W2 on the counterweight 9 side, that is, the total value of the tension acting on the hoisting rope 7 on the counterweight 9 side, is the mass of the counterweight 9 Ww, and the winding on the counterweight 9 side. When the mass of the upper rope 7 is w2a, the mass of the balancing rope 21 on the counterweight 9 side is w2b, and the mass of the balancing wheel device 22 is WC, the following equation is expressed.
W2 = Ww + w2a + w2b + (WC / 2) (7)

  As the lifting height increases, the mass of the hoisting rope 7 increases, so the mass of the balancing rope 21 that compensates for it also increases, and accordingly, the mass of the balancing wheel device 22 also increases. For this reason, W2 is increased, and the torque Ts1 necessary for generating the rope slip is also increased.

  On the other hand, in the elevator apparatus of the first embodiment, the tension acting on the hoisting rope 7 on the counterweight 9 side by jacking up the counterbalance apparatus 22 during the operation test of the safety device 14. Is reduced by WC / 2, the torque Ts1 can be reduced and the hoisting machine 3 can be downsized. The jack-up device 25 can be installed regardless of the position of the counterweight 9 and without being affected by the length of the counterweight buffer 13.

Embodiment 2. FIG.
2 is a block diagram showing an elevator apparatus according to Embodiment 2 of the present invention. In this example, a lifting device 26 that lifts the balancing vehicle device 22 from an elevator device (for example, guide rails 10 and 11 or a rail bracket) in the hoistway 1 is used as the balancing vehicle lifting device. For example, a chain block is used as the lifting device 26. The lifting device 26 reduces the torque of the motor 5 for causing the sheave 4 to idle by displacing the balancing wheel device 22 upward during the operation test of the safety device 14. Other configurations and the emergency stop test method are the same as those in the first embodiment.

  Also in such an elevator apparatus, the torque Ts1 can be reduced during the operation test of the safety device 14, and the hoisting machine 3 can be downsized. The lifting device 26 can be installed regardless of the position of the counterweight 9 and without being affected by the length of the counterweight buffer 13.

Embodiment 3 FIG.
3 is a block diagram showing an elevator apparatus according to Embodiment 3 of the present invention. In Embodiment 3, the torque of the motor 5 for idling the sheave 4 is reduced by removing the load weight 24 from the balancing wheel device 22 during the operation test of the safety device 14. Other configurations and the emergency stop test method are the same as those in the first embodiment.

  In such an elevator apparatus, the tension acting on the hoisting rope 7 on the counterweight 9 side is reduced by the amount of the weight of the load weight 24 by removing the load weight 24 from the counterweight vehicle apparatus 22. The torque Ts1 can be reduced, and the hoisting machine 3 can be reduced in size. Further, the load weight 24 can be attached and detached regardless of the position of the counterweight 9 and without being affected by the length of the counterweight buffer 13.

Note that Embodiments 1 and 3 may be combined, or Embodiments 2 and 3 may be combined. That is, after removing the load weight 24 from the balancing vehicle device 22, the balancing vehicle device 22 may be displaced upward, and the capacity of the jack-up device 25 and the lifting device 26 can be reduced. .
In the above example, the hoisting rope 7 is shown as the suspension means, but a belt may be used. Similarly, the balancing rope 21 may be belt-shaped.
Furthermore, in the above example, the 1: 1 roping elevator device is shown, but the roping method is not limited to this, and the present invention can be applied to, for example, a 2: 1 roping elevator device.
Furthermore, the layout of the elevator equipment (number and position of the hoisting machine 3 and the counterweight 9) is not limited to the example shown in FIG.
Further, the present invention can be applied to a machine room-less elevator having no machine room and various types of elevator apparatuses.

  1 hoistway, 3 hoisting machine, 4 sheaves, 5 motor, 7 hoisting rope (suspension means), 8 car, 9 counterweight, 10 car guide rail, 11 counterweight guide rail, 14 emergency stop device, 21 Balance rope, 22 Balance wheel device, 24 Weight for load, 25 Jack-up device (balance wheel moving device), 26 Lifting device (balance wheel moving device).

Claims (7)

A hoisting machine having a sheave and a motor that rotates the sheave;
Suspension means wound around the sheave,
A car and a counterweight suspended by the suspension means and lifted and lowered in the hoistway by the hoisting machine;
A plurality of guide rails installed in the hoistway for guiding the raising and lowering of the car and the counterweight;
An emergency stop device provided on the car and engaged with the guide rail to stop the car in an emergency manner;
A balancing rope suspended between the car and the counterweight;
A balance wheel device provided at a lower portion of the hoistway and around which the balance rope is wound, tensioning the balance rope, and the balance wheel device during an operation test of the emergency stop device. An elevator apparatus comprising: a balance wheel upper moving device that is displaced upward to reduce torque of the motor for causing the sheave to idle.   2. The elevator apparatus according to claim 1, wherein the balance vehicle moving device is a jack-up device that is installed at a lower portion of the hoistway and lifts the balance vehicle device.   2. The elevator apparatus according to claim 1, wherein the balancing vehicle moving device is a lifting device that lifts the balancing vehicle device from a device in the hoistway. A hoisting machine having a sheave and a motor that rotates the sheave;
Suspension means wound around the sheave,
A car and a counterweight suspended by the suspension means and lifted and lowered in the hoistway by the hoisting machine;
A plurality of guide rails installed in the hoistway for guiding the raising and lowering of the car and the counterweight;
An emergency stop device provided on the car and engaged with the guide rail to stop the car in an emergency manner;
A flexible balancing rope suspended between the car and the counterweight; and provided at the lower part of the hoistway and wound around the balancing rope, Equipped with a balance wheel device that applies tension to
The balance vehicle apparatus has a load weight that can be attached and detached. An elevator that tests whether the emergency stop device operates normally by idling the sheave in the direction in which the car descends with the emergency stop device engaged with the guide rail and the car stopped. A device emergency stop test method,
The torque of the motor for idling the sheave is reduced by displacing the balance wheel device that applies tension to the balance rope suspended between the car and the balance weight. An emergency stop test method for an elevator apparatus. An elevator that tests whether the emergency stop device operates normally by idling the sheave in the direction in which the car descends with the emergency stop device engaged with the guide rail and the car stopped. A device emergency stop test method,
The torque of the motor for idling the sheave is reduced by removing the load weight from the balance wheel device that applies tension to the balance rope suspended between the car and the balance weight. An emergency stop test method for an elevator apparatus.   The torque of the motor for idling the sheave is further reduced by displacing the balance wheel device upward after removing the load weight from the balance wheel device. Item 7. The emergency stop test method for an elevator apparatus according to Item 6.

Images