WO2012140720A1

WO2012140720A1 - Elevator apparatus

Info

Publication number: WO2012140720A1
Application number: PCT/JP2011/059017
Authority: WO
Inventors: 峰夫岡田
Original assignee: 三菱電機株式会社
Priority date: 2011-04-11
Filing date: 2011-04-11
Publication date: 2012-10-18

Abstract

Provided is an elevator apparatus in which a brake device slows down or stops a cage. A mass moves in relation to a movement of the cage. An acceleration detection mechanism detects an acceleration of the cage which exceeds a predetermined value by using a force applied to the mass as the cage is accelerated. While at least one of a cage door and a boarding place door is opened, a safety monitoring part slows down or stops the cage by using the brake device if the acceleration detection mechanism detects that the acceleration of the cage exceeds the predetermined value.

Description

Elevator equipment

This invention relates to an elevator apparatus, and more particularly to an apparatus for more reliably preventing door-opening travel.

In a conventional elevator door-opening travel prevention system, a car door open state is detected by a door-open detector, and a door-open detection signal is input to a door-open travel abnormality determination circuit. A current command signal from the speed control circuit is also input to the door opening running abnormality determination circuit together with the door opening detection signal. Then, the door open running abnormality determining circuit outputs an emergency stop command signal to the inverter control circuit when it is determined from the two input signals that the car has started running in the door open state (for example, , See Patent Document 1).

JP 2009-154988 A

In the conventional door-opening travel prevention system as described above, when the car door or the landing door is open, for example, when the hoisting machine runs out of control, the car has a high acceleration (the floor position of the car remains open). When the acceleration exceeding the acceleration normally generated in the “floor adjustment operation” to be adjusted occurs, the reliability of the signal from the speed control circuit included in the control system cannot be ensured. In this case, since the car speed increases in a short time, there is a possibility that the car cannot be quickly stopped within a predetermined distance. In addition, even when the car speed is monitored by a signal from the encoder provided in the hoist or speed governor, if the encoder fails, the reliability of the signal cannot be ensured and the car is kept at a predetermined distance. There is a possibility that it cannot be stopped immediately within.

The present invention has been made to solve the above-described problems, and even when a high acceleration occurs in the car due to a control runaway or the like with the car door or the landing door opened, the car can be quickly moved. An object is to obtain an elevator apparatus that can be stopped.

An elevator apparatus according to the present invention includes a car having a car door, a plurality of landing doors respectively provided at a plurality of halls, a braking device for braking the car, a mass body that operates in relation to the movement of the car, and an acceleration of the car And at least one of an acceleration detection mechanism for detecting that an acceleration exceeding a preset value is generated in the car, and a car door and a landing door are opened using the force generated in the mass body In the state, when the acceleration detection mechanism detects that the acceleration exceeding the set value has occurred in the car, the safety monitoring unit is provided to stop the car by the braking device.

In the elevator apparatus according to the present invention, it is detected that an acceleration exceeding a preset set value is generated in the car using a force generated in the mass body according to the acceleration of the car, and at least the car door and the landing door are detected. When the acceleration detection mechanism detects that an acceleration exceeding the set value has occurred with any one of the doors open, the car is stopped by the braking device, so that the car door or the landing door is open. Even when a high acceleration occurs in the car due to control runaway or the like, the car can be quickly stopped.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the elevator apparatus by Embodiment 1 of this invention. It is a front view which shows the cage | basket | car of FIG. It is a front view which shows the state which the car door of FIG. 2 opened. It is a block diagram which expands and shows the cage | basket | car of FIG. FIG. 5 is a configuration diagram illustrating a state in which the car of FIG. 4 is accelerated downward with an acceleration α [m / s ² ] with respect to the mass body. FIG. 5 is a configuration diagram showing a state in which the car of FIG. 4 is accelerated upward with respect to the mass body at an acceleration α [m / s ² ]. FIG. 7 is a circuit diagram showing a connection state of a car door opening detection switch, a landing door opening detection switch, and an acceleration detection switch of FIGS. It is a circuit diagram which shows the state which detected the door opening driving | running | working of the circuit of FIG.

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 (driving device) 3, a deflecting wheel 4, and a control device 5 are installed. The hoisting machine 3 includes a drive sheave 6, a hoisting machine motor that rotates the driving sheave 6, and a hoisting machine brake (electromagnetic brake) 7 as a brake device that brakes the rotation of the driving sheave 6. .

The hoisting machine brake includes a brake wheel (drum or disk) coupled coaxially with the drive sheave 6, a brake shoe that contacts and separates from the brake wheel, a brake spring that presses the brake shoe against the brake wheel and applies a braking force, And an electromagnetic magnet that releases the braking force by releasing the brake shoe from the brake wheel against the brake spring.

Suspension means 8 is wound around the drive sheave 6 and the deflecting wheel 4. As the suspension means 8, a plurality of ropes or a plurality of belts are used. A car 9 is connected to the first end of the suspension means 8. A counterweight 10 is connected to the second end of the suspension means 8.

The car 9 and the counterweight 10 are suspended in the hoistway 1 by the suspension means 8 and are raised and lowered in the hoistway 1 by the hoisting machine 3. The control device 5 raises and lowers the car 9 at a set speed by controlling the rotation of the hoisting machine 3.

In the hoistway 1, a pair of car guide rails 11 that guide the raising and lowering of the car 9 and a pair of counterweight guide rails 12 that guide the raising and lowering of the counterweight 10 are installed. At the bottom of the hoistway 1, a car shock absorber 13 for buffering the collision of the car 9 with the hoistway bottom and a counterweight buffer 14 for buffering the collision of the counterweight 10 with the hoistway bottom are installed. ing.

At the lower part of the car 9, an emergency stop device 15 that is engaged with the car guide rail 11 to stop the car 9 in an emergency is mounted.

The machine room 2 is provided with a first sheave 16. A rope 17 is wound around the first sheave 16. The rope 17 is laid circularly in the hoistway 1 and connected to the car 9. The rope 17 is wound around a second sheave 18 provided at the lower part of the hoistway 1. Thus, when the car 9 is raised and lowered, the rope 17 is circulated, and the first and

second sheaves

16 and 18 are rotated at a rotational speed corresponding to the traveling speed of the car 9.

In the first embodiment, the mass body 19 that operates in association with the movement of the car 9 includes a first sheave 16, a rope 17, and a second sheave 18. The connecting portion of the rope 17 to the car 4 detects that an acceleration exceeding a preset set value has occurred in the car 9 by using a force generated in the mass body 19 according to the acceleration of the car 9. An acceleration detection mechanism 20 is provided.

The car 9 is provided with a car door 21 and a car door device 22 that drives the car door 21 to open and close. The opening and closing of the car door 21 is controlled by the control device 5.

The landing doors 23a to 23d are provided at the landings on each floor. The landing doors 23a to 23d are opened and closed in conjunction with the opening and closing of the car door 21 when the car 9 stops at the landing position. Above each of the landing doors 23a to 23d, landing door guide devices 24a to 24d for guiding the opening and closing movement of the corresponding landing doors 23a to 23d are provided.

2 is a front view showing the car 9 in FIG. 1, and FIG. 3 is a front view showing a state in which the car door 21 in FIG. 2 is opened. The car door device 22 is provided with a car door open detection switch (car door open detecting means) 25 for detecting that the car door 21 is open. The car door 21 is provided with a car door cam 26 for operating the car door open detection switch 25 when the car door 21 is open.

Similarly to the car door open detection switch 25, the landing door guide devices 24a to 24d detect landing door open detection switches 27a to 27d (FIGS. 7 and 8) that detect that the corresponding landing doors 23a to 23d are open. Is provided. The landing doors 23a to 23d are provided with landing door cams (not shown) that operate the corresponding landing door open detection switches 27a to 27d when the corresponding landing doors 23a to 23d are open.

FIG. 4 is a configuration diagram showing the car 9 in FIG. 1 in an enlarged manner. A mounting arm 31 is provided on the car 9. The mounting arm 31 is provided with a hole through which the rope 17 passes. First and

second spring receivers

32 a and 32 b are fixed to the rope 17. The first spring receiver 32 a is fixed to the rope 17 on the upper side of the attachment arm 31. The second spring receiver 32 b is fixed to the rope 17 below the attachment arm 31.

Between the 1st spring receptacle 32a and the attachment arm 31, the 1st press spring 33a as an elastic body is provided. Between the second spring receiver 32b and the mounting arm 31, a second pressing spring 33b as an elastic body is provided. The rope 17 is passed through the first and second

elastic bodies

33a and 33b.

The spring constants of the first and second

pressing springs

33a and 33b are the same (k [N / m]). The first and

second spring receivers

32a and 32b are fixed to the rope 17 at positions where the first and second push springs 33a and 33b are compressed from the free length by X ₀ [m]. Thereby, a force of k × X ₀ [N] acts on the rope 17 via the first spring receiver 32a by the first pressing spring 33a and the second spring by the second pressing spring 33b. A force of k × X ₀ [N] acts downward via the receiver 32b. As a result, the rope 17 is stationary with respect to the car 9.

The cage 9 is provided with a first acceleration detection switch 34a operated by the first spring receiver 32a and a second acceleration detection switch 34b operated by the second spring receiver 32b.

The first acceleration detection switch 34a is operated when the first spring receiver 32a is displaced upward by X ₁ [m] or more with respect to the car 9 from the position shown in FIG. 4 above the first spring receiver 32a. It is arranged at the position.

The second acceleration detection switch 34b is operated when the second spring receiver 32b is displaced downward by X ₂ [m] or more with respect to the car 9 from the position shown in FIG. 4 below the second spring receiver 32b. It is arranged at the position. That is, the

acceleration detection switches

34a and 34b are operated according to the expansion and contraction of the first and second push springs 33a and 33b.

The mass of the rope 17 is Mr [kg], the inertia mass at the diameter around which the rope 17 of the first sheave 16 is wound is Ma [kg], and the rope 17 of the second sheave 18 is wound. The inertial mass at the diameter is Mb [kg]. That is, the inertial mass Mt [kg] at the position of the mounting arm 31 of the mass body 19 is
Mt = Mr + Ma + Mb
It is.

FIG. 5 is a configuration diagram showing a state in which the car 9 of FIG. 4 is accelerated downward with respect to the mass body 19 at an acceleration α [m / s ² ]. In this case, the car 9 is separated from the mass body 19 in the mounting arm 31 by Fp = Mt × α (1)
An inertial force Fp [N] having a magnitude of is received upward.

Then, due to the inertial force Fp [N], the second pressing spring 33b is seen only by X [m] from the compression length X ₀ [m] in FIG. 4, and the first pressing spring 33a is changed in FIG. When the compression length X ₀ [m] is extended by X [m],
Fp = 2 × k × X (2)
It becomes the relationship.

Therefore, when the car 9 is accelerated at an acceleration α [m / s ² ], from the formulas (1) and (2), the extension X [m] of the pressing spring 33a is X = (Mt × α) / (2 × k (3)
Thus, the second spring receiver 32a is also displaced upward by X [m].

Here, the first acceleration detection switch 34a is operated when the first spring receiver 32a is displaced upward by X ₁ [m] or more. Therefore, the acceleration α of the car 9 for operating the first acceleration detection switch 34a [m / s ^2] from the formula (3),
X ₁ ≦ (Mt × α) / (2 × k)
∴α ≧ (2 × k × X ₁ ) / (Mt) (4)
It is necessary to be the size of.

Therefore, the spring constant k [N / m] of the first and second push springs 33a and 33b, the position X ₁ at which the first and second

acceleration detection switches

34a and 34b are operated, and the inertial mass of the mass body 19 By adjusting Mt [kg], a downward acceleration exceeding a preset set value is generated in the car 9 using a force generated in the mass body 19 according to the acceleration of the car 9. Can be detected.

FIG. 6 is a configuration diagram illustrating a state in which the car 9 of FIG. 4 is accelerated upward with an acceleration α [m / s ² ] with respect to the mass body 19, contrary to FIG. 5. When accelerating upward, as in equation (4),
α ≧ (2 × k × X ₂ ) / (Mt) (5)
The second acceleration detection switch 34b is operated when the acceleration α is [m / s ² ].

Therefore, the spring constant k [N / m] of the first and second push springs 33a and 33b, the position X ₂ where the first and second

acceleration detection switches

34a and 34b are operated, and the inertial mass of the mass body 19 By adjusting Mt [kg], it is possible to detect that an upward acceleration exceeding the set value is generated in the car 9 by using a force generated in the mass body 19 according to the acceleration of the car 9. it can.

Here, if the position X ₁ [m] at which the first acceleration detection switch 34 a is operated and the position X ₂ [m] at which the second acceleration detection switch 34 b is operated are the same, the upper and lower sides of the car 9 It is possible to detect accelerations of the same magnitude. Conversely, by changing X ₁ [m] and X ₂ [m], it is possible to detect accelerations of different magnitudes in the vertical direction.

Further, when the above-mentioned X ₁ [m] and X ₂ [m] are made the same size, if the spring constants of the first and second

pressing springs

33a and 33b are made the same, the upper and lower sides of the car 9 It is possible to detect accelerations of the same magnitude. Conversely, by changing the spring constant, it is possible to detect accelerations of different magnitudes in the vertical direction.

7 is a circuit diagram showing a connection state of the car door opening detection switch 25, the landing door opening detection switches 27a to 27d, and the

acceleration detection switches

34a and 34b of FIGS. 2 to 6, and FIG. It is a circuit diagram which shows the detected state.

The car door opening detection switch 25 and the landing door opening detection switches 27a to 27d are connected in series. The first and second

acceleration detection switches

34a and 34b are connected in series.

The door opening detection circuit including the car door opening detection switch 25 and the landing door opening detection switches 27a to 27d and the acceleration detection circuit including the first and second

acceleration detection switches

34a and 34b are separate circuits, respectively. The safety monitoring unit 35 is connected. The safety monitoring unit 35 can be provided in the control device 5 or can be provided independently of the control device 5.

When at least one of the car door 21 and the landing doors 23a to 23d is opened, the contacts of the corresponding detection switches 25 and 27a to 27d are opened, and the door open detection circuit is shut off. When the acceleration of the car 9 exceeds the set value, the contact of the first or second

acceleration detection switch

34a, 34b is opened, and the acceleration detection circuit is shut off.

The safety monitoring unit 35 cuts off the power supply to the hoisting machine 3 when one or more of the detection switches 25, 27a to 27d and the first or second

acceleration detection switches

34a, 34b are opened simultaneously. Stop the operation of the basket 9. In other words, the safety monitoring unit 35 detects that the acceleration detection mechanism 20 detects that an acceleration exceeding the set value has occurred in the car 9 with at least one of the car door 21 and the landing doors 23a to 23d opened. In addition, the car 9 is immediately stopped by the hoisting machine brake 7.

Such a function of the safety monitoring unit 35 can be realized by, for example, a microcomputer or a logic circuit.

Here, usually, the elevator apparatus is provided with a door-open travel protection device. The door open travel protection device stops the car 9 by the hoisting machine brake 7 when the car 9 is raised or lowered by a preset door open travel detection distance while the car door 21 is open.

The door open travel detection distance set in this door open travel protection device is defined as p [m]. Further, let L [m] be an allowable deviation distance (determined by laws and regulations or the structure of the elevator apparatus) between the floor surface of the car 9 and the floor surface of the hall with the door open. Furthermore, the safety monitoring section 35 is a deceleration when stopping the cut off driving of the car 9 power supply to the hoisting machine 3, α2 [m / s ^2]. The acceleration set value α1 [m / s ² ] in the acceleration detection mechanism 20 is
α1 = ((L−p) / p) × α2 (6)
And

That is, the acceleration α [m / s ² ] in the equations (4) and (5) is made smaller than the acceleration α1 [m / s ² ] in the equation (6). Thereby, even when the car 9 is accelerated rapidly, the car 9 can be stopped within a distance L [m] to be braked determined by the law or the structure of the elevator apparatus.

On the other hand, in the re-flooring operation of the car 9, it is necessary to move the car 9 while the car door 21 and the corresponding door among the landing doors 23a to 23d are open. However, in that case, it is possible to perform the floor-to-floor operation without detecting an abnormality by operating at an acceleration smaller than the acceleration α [m / s ² ] in the equations (4) and (5). is there.

In such an elevator apparatus, it is detected that an acceleration exceeding a preset value is generated in the car 9 by using the force generated in the mass body 19 in accordance with the acceleration of the car 9, and the car door 21 and When at least one of the landing doors 23a to 23d is opened and the acceleration detecting mechanism 20 detects that an acceleration exceeding the set value has occurred in the car 9, the hoisting machine brake 7 stops the car 9. Therefore, even when a high acceleration occurs in the car 9 due to control runaway or the like with the car door 21 or the landing doors 23a to 23d opened, the car 9 can be quickly stopped within a predetermined distance.

The first or

second sheaves

16, 18 may also serve as a governor sheave, and the rope 17 may also serve as a governing rope. In this case, the rope 17 is connected to the operating lever of the safety device 15 via the acceleration detection mechanism 20. In the governor, it is mechanically detected that the traveling speed of the car 9 has reached an overspeed. As the overspeed detected by the governor, a first overspeed Vos higher than the rated speed Vo and a second overspeed Vtr higher than the first overspeed are set. The acceleration setting value in the acceleration detection mechanism 20 is sufficiently smaller than the acceleration when the car 9 is free-falling, and is set to a value smaller than the first overspeed Vos of the governor when replaced with the speed. Is done.
Alternatively, the emergency stop device 15 may be operated by operating the operating lever of the safety device 15 using the inertia force generated in the mass body 19. In this case, the excessive acceleration level for operating the safety device 15 is set to a value close to the acceleration when the car 9 falls freely, and the acceleration setting value in the acceleration detection mechanism 20 is sufficiently higher than the excessive acceleration level. Set to a small value.

Further, in the above example, the safety monitoring unit 35 stops the car 9 by the hoisting machine brake 7, but the brake device is not limited to the hoisting machine brake 7, for example, a brake for gripping the suspension means 8. (Rope brake) or a brake (car brake) mounted on the car 9 may be used.
Furthermore, although the 1: 1 roping elevator apparatus is shown in FIG. 1, the roping system is not limited to this, and the present invention can be applied to, for example, a 2: 1 roping elevator apparatus.
Further, the present invention can be applied to a machine room-less elevator without the machine room 2 and various types of elevator apparatuses.

Claims

A car with a car door,
A plurality of landing doors respectively provided at a plurality of landings,
A brake device for braking the car;
A mass body that operates in relation to the movement of the cage;
An acceleration detection mechanism that detects that an acceleration exceeding a preset value is generated in the car by using a force generated in the mass body in accordance with the acceleration of the car, and the car door and the landing door A safety monitoring unit for stopping the car by the brake device when it is detected by the acceleration detection mechanism that an acceleration exceeding the set value has occurred in the car with at least one of Elevator equipment.
The mass body is laid annularly in a hoistway and has a rope connected to the car and a sheave around which the rope is wound,
The elevator apparatus according to claim 1, wherein the rope is moved and the sheave is rotated according to the raising and lowering of the car.
The elevator apparatus according to claim 2, wherein the acceleration detection mechanism includes an elastic body connected between the car and the rope, and an acceleration detection switch operated according to expansion and contraction of the elastic body.
Further comprising a governor for detecting an overspeed of the car;
The sheave on which the rope is wound is a governor sheave provided in the governor,
The elevator apparatus according to claim 2, wherein the rope is a governor rope.
A hoisting machine that has a driving sheave, a hoisting machine motor that rotates the driving sheave, and a hoisting machine brake that serves as the brake device that brakes the rotation of the driving sheave; A suspension means that is wound around the sheave and suspends the car;
The safety monitoring unit, when the acceleration detection mechanism detects that an acceleration exceeding the set value has occurred in the car in a state where at least one of the car door and the landing door is open, The elevator apparatus according to claim 1, wherein power supply to the hoisting machine is interrupted to brake the hoisting machine brake.