WO2006001075A1

WO2006001075A1 - Elevator

Info

Publication number: WO2006001075A1
Application number: PCT/JP2004/009368
Authority: WO
Inventors: Masami Yoshikawa
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2004-06-25
Filing date: 2004-06-25
Publication date: 2006-01-05
Also published as: KR20080031468A; EP1760030A4; KR100962816B1; CN1832897A; EP1760030B1; JPWO2006001075A1; JP4932478B2; EP1760030A1

Abstract

An elevator in which a main rope suspending a cage and a counterweight are passed about the driving sheave of a driver. The cage side and the counterweight side are arranged to be balanced when the load in the cage does not exceed one half of the maximum loadage of the cage. The cage is provided with a weighing unit for measuring the load in the cage. A torque assist unit is provided in the elevator shaft. An assist controller controls the torque assist unit such that an auxiliary torque is imparted to the driving sheave when the load in the cage obtained based on information from the weighing unit exceeds a specified level.

Description

Elevator equipment

Technical field

The present invention relates to a rope type elevator apparatus in which a car and a counterweight are lifted and lowered by driving a lifting machine.

Technology

Conventionally, Japanese Patent Application Laid-Open No. 5-3 8 18 2 discloses an elevator apparatus that drives a sheave for suspending a car and a counterweight with a plurality of drive systems in order to increase the capacity.

The In this conventional elevator system, the output sharing of each drive system is determined based on the required torque.

In the conventional elevator system, the weight of the counterweight is the same as the total weight of 1 Z 2 of the maximum load of the car (capacity of the car) and the car's own weight in order to reduce the size of each drive system. Is set to be In other words, the car side and the counterweight side are balanced when the capacity 1 or 2 is on the car.

However, in general, it is known that 1/2 of the car's capacity is low. Especially in residential elevators, there are usually 1 or 2 people. In recent years, large-scale offices are often equipped with large-capacity elevators to cope with peak times such as when going to work, leaving the office, or at lunch. At times, there are overwhelmingly more than 12 passengers. As described above, in the conventional elevator apparatus, waste of energy consumption during normal operation is increased.

Disclosure of the invention

The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide an elevator apparatus that can reduce energy consumption. An elevator apparatus according to the present invention includes a drive device having a drive device main body and a drive sheave rotated by the drive device main body, a main rope strung over the drive sheave, and a main rope The car is suspended at one end of the car, and is suspended at the other end of the main rope, and balances with the car when the weight load in the car is less than 1 2 of the maximum load weight of the car. A weight assist device for applying auxiliary torque to the drive sheave, a weighing device for measuring the magnitude of the weight load in the car, and a weight load magnitude obtained based on information from the weighing apparatus is predetermined. An assist control device is provided for controlling the torque assist device so that auxiliary torque is applied to the drive sheave when the value exceeds the value. Brief Description of Drawings

FIG. 1 is a front view showing an elevator apparatus according to Embodiment 1 of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Preferred embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1.

FIG. 1 is a front view showing an elevator apparatus according to Embodiment 1 of the present invention. In the figure, a hoisting machine 2 as a driving device is provided in the upper part of the hoistway 1. The hoisting machine 2 includes a drive device body 3 including a motor, and a drive sheep 4 that is provided in the drive device body 3 and is rotated by driving of the drive device body 3. In addition, a deflector 5 is provided in the vicinity of the lifting machine 2.

A plurality of main ropes 6 are wound around the drive sheave 4 and the deflector 5. A car 7 is connected to one end of each main rope 6, and a counterweight 8 is connected to the other end of each main rope 6. The car 7 and the counterweight 8 are suspended in the hoistway 1 by the main ropes 6. In addition, the car 7 and the counterweight 8 are moved up and down 1 km by the rotation of the drive sheave 4.

Below the car 7, there is provided a scale device 9 for measuring the size of the weight load in the car 7 (for example, the weight of a heavy article placed in the car 7 such as a passenger or a luggage). The scale device may measure the weight load in the car 7 by measuring the tension of the main rope 6.

The weight of the counterweight 8 is 1 of the maximum load weight of the car 7 (the capacity of the car 7 capacity) It is lighter than the total weight of the weight of 2 and the car's own weight. That is, when the weight load in the car 7 is a reference weight that is smaller than the weight of 1 to 2 of the maximum load weight of the car 7, the car 7 side and the counterweight 8 side are balanced. ing. Therefore, when the weight load in the car 7 is the reference weight, the output torque of the lifting machine 2 is the lowest (lower limit).

Hoisting machine 2 is set so that the output torque becomes maximum (upper limit) when the difference in weight between the car 7 side and the counterweight 8 side is equal to the reference weight. That is, the hoisting machine 2 has a maximum output torque when the weight load in the car 7 is unloaded and when the weight load in the car 7 is twice the reference weight (predetermined value). It is set to be. Therefore, the hoisting machine 2 can move up and down the car 7 and the counterweight 8 independently while the weight difference between the car 7 side and the counterweight 8 side is within the reference weight or less. In this example, the capacity of car 7 is 10 people. The weight of the counterweight 8 is the total weight of the weight of the car 7 and the weight of two people. That is, when two passengers are in the car 7, which is less than the capacity of the car 7, which is the capacity of 10 people, the car 7 side and the counterweight 8 side It comes to balance. In other words, the weight of two passengers is the reference weight.

The hoisting machine 2 is set to have a maximum output torque when the car 7 is empty and when four passengers are in the car 7. That is, the hoisting machine 2 is set to have the maximum output torque when the weight difference between the car 7 side and the counterweight 8 side is the weight of two passengers. Therefore, the lifting machine 2 can lift and lower the car 7 and the counterweight 8 independently when the weight difference between the car 7 side and the counterweight 8 side is less than the weight of two passengers. It has become.

In the hoistway 1, a torque assist device 10 for providing the drive sheave 4 with an auxiliary torque that compensates for the shortage of the output torque of the lifting machine 2 and adds a rotational force to the drive sheave 4 is provided. The torque assist device 10 is separate from the hoist 2. Further, the torque assist device 10 is disposed below the hoisting machine 2. Further, the torque assist device 10 includes an assist device main body 11 including a motor, and a contact roller 12 that contacts the outer periphery of the drive sheave 4 and is rotated by driving the assist device main body 11. Yes. A high friction member for preventing the contact roller 12 from slipping with respect to the drive sheave 4 is provided on the outer peripheral portion of the contact roller 12. The drive sheave 4 is rotated by the rotation of the contact roller 1 2. As a result, the rotational torque of the assist device body 11 is transmitted to the drive sheave 12 as auxiliary torque via the contact roller 12.

In the hoistway 1, an elevator control device 13 that controls the operation of the elevator and an assist control device 14 that controls the drive of the torque assist device 10 are provided. The elevator control device 13 is electrically connected with a lifting machine 2, a weighing device 9, and an assist control device 14 respectively. The elevator control device 13 controls the hoist 2 based on information from the scale device 9.

The assistance control device 14 is electrically connected to the torque assistance device 10. Information from the scale device 9 is input to the assistant control device 14 via the elevator control device 13. The assist control device 14 controls the driving of the torque assist device 10 based on information from the scale device 9.

The assist control device 14 sends auxiliary torque to the drive sheave 4 when the weight load obtained based on the information from the weighing device 9 becomes larger than twice the reference weight (predetermined value). The torque assist device 10 is controlled so as to stop the output of the auxiliary torque when the value becomes equal to or less than a predetermined value. Further, the assist control device 14 controls the drive of the torque assist device 10 so as to adjust the magnitude of the auxiliary torque applied to the drive sheave 4 according to the weight load in the car 7. It has become.

That is, when the difference in weight between the car 7 side and the counterweight 8 side is less than the reference weight, the magnitude of torque required to raise and lower the car 7 and the counterweight 8 is the output torque of the hoisting machine 2. 'Because it is within the allowable range, the drive sheave 4 is rotated by the output torque of the lifting machine 2 alone, and the car 7 and the counterweight 8 are raised and lowered. If the difference in weight between the car 7 side and the counterweight 8 side is larger than the reference weight, the required torque will exceed the allowable range of the output torque of the lifting machine 2. In addition to the output torque of 2, auxiliary torque by the torque assist device 10 is applied to the drive sheave 4. As a result, the drive sheave 4 is rotated by the torque that combines the output torque of the lifting machine 2 and the auxiliary torque of the torque assist device 10, and the car 7 and the counterweight 8 are raised and lowered. The The magnitude of the auxiliary torque applied to the drive sheave 4 is adjusted according to the weight difference between the car 7 side and the counterweight 8 side under the control of the assist control device 14. In this example, if the number of passengers in the car 7 becomes 5 or more, the output torque of the lifting machine 2 will be insufficient, so the auxiliary torque of the torque assist device 1 0 is controlled by the assist control device 14 Is added. Further, the magnitude of the auxiliary torque is adjusted by the assist control device 14 according to the magnitude of the weight load obtained based on the information from the weighing device 9.

Next, the operation will be described. Information from the weighing device 9 is constantly input to the elevator control device 13 and the assist control device 14. As a result, the elevator controller 13 and the assist controller 14 can determine the weight load in the car 7. The magnitude of the output torque of the hoisting machine 2 is adjusted according to the magnitude of the weight load in the car 7 by the control of the elevator control device 1 3.

When the weight load in the car 7 is less than twice the reference weight, that is, when the number of passengers in the car 7 is 4 or less, the torque assist device 10 is driven by assist control. Stopped by control of device 14 and the application of auxiliary torque to drive sheave 4 is stopped. As a result, the drive sheave 4 is rotated only by the output torque of the lifting machine 2, and the car 7 and the counterweight 8 are raised and lowered in the hoistway 1.

When the size of the weight load in the car 7 is larger than twice the reference weight, that is, when the number of passengers in the car 7 becomes 5 or more, the torque assist device 1 0 is an assist control device. Driven by the control of 1 4, the assist torque is given to the drive sheep 4 together with the output torque of the hoist 2. The magnitude of the auxiliary torque at this time is adjusted by the control of the assist control device 14 according to the magnitude of the weight load of the car 7 mm. As a result, the drive sheave 4 is rotated, and the car 7 and the counterweight 8 are raised and lowered in the hoistway 1.

In such an elevator system, when the weight load in the car 7 is a reference weight smaller than 1 Z 2 of the maximum load weight of the car 7, the car 7 side and the counterweight 8 side balance. When the weight load in the car 7 becomes larger than twice the weight of the reference weight, the auxiliary torque generator S torque assist is used to compensate for the shortage of the output torque of the lifting machine 2. Driven by device 1 0> will be given to tube 4 Therefore, the maximum output torque of the hoisting machine 2 can be reduced and the hoisting machine 2 can be downsized. In addition, most of the elevator operation at normal times except during peak hours can be performed by driving only the downsized hoist 2 and the amount of energy consumed for elevator operation can be reduced. . Furthermore, since the counterweight 8 can be reduced in size, the installation space for the elevator apparatus can be reduced.

Also, the difference in weight between the car 7 side and the counterweight 8 side is that the weight load in the car 7 is twice the reference weight (predetermined value) and the weight load in the car 7 is Since it is the same when no load is applied, the capacity of the hoisting machine 2 can be applied to the maximum, and the capacity of the torque assist device 10 can be prevented from being increased.

In addition, the magnitude of the auxiliary torque is adjusted according to the weight load in the car 7 by the control of the assist control device 14 to the torque assist device 10. It is possible to prevent the amount of energy consumed by the device 10 from increasing more than necessary.

In addition, since the torque assist device 10 is separated from the lifting machine 2, the torque assist device 14 and the lifting machine 2 can be easily handled, and maintenance work is easy. Can be done.

Further, the torque assist device 10 has a contact roller 12 for contacting the drive sheave 4 to transmit the auxiliary torque to the drive sheave 4, so that the auxiliary sheave 4 is provided with a simple configuration. be able to.

In the above example, the elevator control device 13 and the assist control device 14 are provided in the hoistway 1 separately from each other, but the assist control device 14 is mounted on the elevator control device 13. Moyore.

In the above example, the contact torque of the torque assist device 10 can be transmitted to the drive sheave 4 by the contact of the contact roller 12 with the drive sheave 4. Torque assist device 1 Drive sheave with 0 auxiliary torque

You can even send it to 4. In this case, the lifting machine 2 is provided with a pulley that rotates together with the drive sheave 4, and the torque assist device 10 is provided with a pulley that is rotated by the assist device body 11. In addition, the belt for power transmission Wound between pulleys.

In the above example, the torque assist device 10 is separated from the lifting machine 2 and the rotational shaft of the torque assist device 10 is coaxially connected to the rotational shaft of the force drive sheave 4. May be. As a result, the contact roller 12 can be eliminated, and the number of parts can be reduced.

Furthermore, the torque assist device 10 may be incorporated into the drive device body 3 and integrated. As a result, the installation space for the hoisting machine 2 and the torque assist device 10 can be reduced.

Furthermore, in the above example, the present invention is applied to a 1: 1 roving type elevator apparatus in which one end of the main rope 6 is connected to the car 7 and the other end of the main rope 6 is connected to the counterweight 8. However, the present invention is applied to a 2: 1 roving type elevator apparatus in which a car suspension car and a counterweight suspension car on which the main rope is wound are provided in the car 7 and the counterweight 8, respectively. Also good. In this case, one end and the other end of the main rope are connected to the upper part of the ascending / descending path 1. Further, the main rope 6 is provided so as to be wound from the one end part in the order of the car suspension car, the drive sheave 4 and the counterweight suspension car to the other end part.

Claims

The scope of the claims

1. a drive device having a drive device body and a drive sheave rotated by the drive device body;

A main rope wound around the drive sheave,

A basket suspended on the main rope,

A counterweight that is suspended from the main rope and balances with the car when the weight load in the car is less than 1 Z 2 of the maximum load of the car.

A torque assist device for applying auxiliary torque to the drive sheave;

A weighing device for measuring the magnitude of the weight load in the cage; and

An assist control device for controlling the torque assist device so as to give the auxiliary torque to the drive sheave when the magnitude of the weight load obtained based on the information from the scale device becomes larger than a predetermined value.

An elevator apparatus characterized by comprising:

2. The weight difference between the car side and the counterweight side should be the same when the weight load is the predetermined value and when the weight load is unloaded. The elevator apparatus according to claim 1, wherein:

3. The elevator apparatus according to claim 1, wherein the magnitude of the auxiliary torque is adjusted according to the magnitude of the weight load.

4. The elevator apparatus according to claim 1, wherein the torque assist device is separated from the drive device.

5. The elevator apparatus according to claim 1, wherein the torque assist device includes a contact roller for contacting the drive sheave and transmitting the auxiliary torque to the drive sheave. .

6. The elevator apparatus according to claim 1, wherein the torque assist device is incorporated in the drive device main body.