JPH04148785A - Driving device for elevator - Google Patents

Abstract

PURPOSE:To give propulsion force for movement to a cage uniformly and efficiently and smoothly move the cage by constituting an elevator drive device out of linear motors arranged on the four corners of the cage. CONSTITUTION:A plurality of electromagnets 50 are arranged in a building on the four position on both outside the four guide rails for an elevator and extending for full length of the passage for the elevator. Permanent magnets 52 corresponding to the electromagnets 50 are fitted on the plates 49 projected from the four corners of a cage 18, reinforced with stays 51. Hereby, the electromagnets 50 and the permanent magnets 52 constitutes linear motors for an elevator in which the electromagnet 50 is a stator and the permanent magnet 52 is a movable element. The linear motors 54 move the cage 18 in the elevator passage 14 in the ascending and descending directions or stop the movement by controlling ampere of alternating current and frequency in the electromagnets 50 with a control device.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an elevator drive.

[Conventional technology]

An elevator system installed in a building or the like includes an elevator hoistway provided along the vertical direction of the building and a cage that accommodates users.

The cage is suspended in the elevator hoistway by a wire cable, and is raised and lowered in the elevator hoistway by winding and pulling out the wire cable, and moves vertically to the floor where the user has called, and then reaches the destination. Transport users to the floor.

In such elevator equipment, in order to increase the amount of transport per unit time of users and per unit area of the building, it is necessary to
It is necessary to increase the car lifting speed or increase the number of elevator shafts.

However, there is a limit to the speed at which the cage can go up and down, and if the number of elevator hoistways is increased, the usable area of each floor of the building will be reduced, resulting in the problem that the space within the building cannot be used effectively. there were.

Furthermore, the excessive weight of wire cables in ultra-high-rise buildings creates structural constraints, making it impossible to install wire cable type elevators.

For this purpose, a plurality of cages are housed in a loop-shaped elevator hoistway in which the upper and lower ends of the ascending route and descending route are connected by an upper passage and a lower passage. An elevator device has been proposed in which the drive is performed by a linear motor without relying on a wire cable.

The linear motor used in this type of elevator equipment is
It is installed in one of two conventional installation positions.

First, as a first installation position, there is one in which the linear motor is installed only on the back side of the cage (the side opposite to the entrance/exit of the cage).

However, when a linear motor is used as the driving force to move the cage in the vertical direction, the vertical force of the linear motor (the attraction or repulsion force generated between the stator and mover that constitute the linear motor) is It has the property of being larger than the propulsive force of a linear motor. Therefore, if it is installed only on one side or if a near motor is used to apply propulsive force in the upward and downward direction of the cage, the movable element attached to the cage must have a strong structure in order to resist the vertical force mentioned above. There wasn't. For this reason, the mounting structure had to be strengthened, which increased the weight of the cage and reduced the speed of raising and lowering the cage.

In addition, as a second installation position, there is one in which linear motors are installed on both sides of the entrance and exit of the cage.

However, although the vertical forces of the beam near motors can be canceled by repelling each other at this position, at the intersection of the lifting passage and the traversing passage, stators corresponding to the movers are attached to the left and right sides of the cage. , the problem arises that smooth movement of the cage in the left and right directions is obstructed.

[Problem to be solved by the invention]

The present invention takes into consideration the above facts, and provides an elevator that eliminates the vertical force generated between the stator and mover of a linear motor, and evenly applies sufficient propulsive force to the car for the car to move up and down. The purpose is to provide a driving device.

[Means to solve the problem]

An elevator drive device according to the present invention moves a car movably arranged in a car passageway that includes a plurality of lifting passages and a traversing passageway that communicates between the lifting passages. a movable element fixed to the cage so as to protrude from near both ends of both sides of the cage along the transverse direction of the cage; and a movable element arranged along the elevating and lowering passage corresponding to the movable element and elevating and lowering. The present invention is characterized by comprising a stator that raises and lowers the cage via the movable element by being sequentially excited along the path.

[Effect]

In the elevator drive device having the above configuration, the propulsive force required for raising and lowering the car is provided by four movers fixed to the car so as to protrude along the traverse direction of the car from near both ends of both sides of the car, It is applied by a linear motor constituted by a stator arranged along the lifting path and sequentially excited along the lifting path. In other words, the cage has
Propulsive force will be applied from four locations on the front and back sides of the cage. Therefore, compared to the case where the propulsion force is applied from one side by a single linear motor, the vertical force is eliminated, so that the movable member can be mounted in a compact structure, and moreover, stable elevation is possible.

〔Example〕

FIG. 1 shows a building 10 to which the elevator drive system of the present invention is applied. The building 10 is provided with an elevator shaft 12 through which a car 18 (described later) of the elevator system moves. The elevator shaft 12 includes four elevating passages 14 extending in the vertical direction of the building 10 and a traversing passage 16 communicating between the elevating passages 14.

The cage 18 is movable within the lifting passage 14 in the upward and downward directions, and is movable within the traversing passage 16 in the horizontal direction, the so-called traversing direction.

As shown in FIG. 2, four lifting guide rails 20 are disposed within the lifting passage 14 along the lifting passage 14. As shown in FIG. Each lifting guide rail 20 has an H-shaped or I-shaped cross section. Further, in the traversing passage 16, a traversing guide rail 22 having an H-shaped cross section is disposed along the traversing passage 16, similar to the elevating guide rail 20. Further, rotating rails 21 are disposed near the upper end and the lower end of the connecting portion between the lifting passage 14 and the traversing passage 16, respectively.

The rotating rail 21 has an H-shaped cross section like the lifting guide rail 20 and the traversing guide rail 22, and the rotating shaft 24 is supported by a bearing 26 fixed to the building and rotates around the rotating shaft 24. It is considered possible. rotating rail 2
1 corresponds to the lifting guide rail 20 at the position shown in FIG. 3, and corresponds to the traversing guide rail 22 at a position rotated by 90 degrees from the position shown in FIG. Traverse guide rail 22
A stopper 28 is attached to the tip. The rotation of the rotating rail 21 is controlled by this stopper 28 from the position corresponding to the lifting guide rail 20 shown in FIG.
``The rotation is limited to a position corresponding to the traverse guide rail 22.

A rail 30 formed in an arc shape and an electromagnet 32 formed in an arc shape are arranged around the rotation shaft 24 of the rotation rail 21 with the rotation shaft 24 as the center (see FIG. 3).

As shown in FIG. 4, the rail 30 has a U-shaped cross section, and two pairs of rollers 34 are attached to the rotating rail 21 to sandwich the rail 3Q. Further, a permanent magnet 36 is attached to the rotating rail 21 and protrudes from the rotating rail 21 in correspondence with the electromagnet 32. Electromagnet 3
2 and the permanent magnet 36 constitute a rotating linear motor 38, the operation of which is controlled by a control device 40 (see FIG. 6). When an alternating voltage is applied to the electromagnet 32 and an alternating current flows, the rotating rail 21 rotates in the direction of the arrow in FIG. 3 or in the opposite direction based on the principle of a known synchronous linear motor.

As shown in FIG. 4, a cage 18 for accommodating an occupant
Support portions 42 are attached to the ends of the upper and lower surfaces, respectively. A holding portion 44 is rotatably supported by each support portion 42 . The holding part 44 rotatably supports a pair of rollers 4G arranged at a predetermined interval. The pair of rollers 46 sandwich the lifting guide rail 20. Thereby, the cage 18 is guided by the lifting guide rails 20 and is movable in the lifting and lowering passages 14 in the upward and downward directions. Furthermore, when the rotating rail 21 rotates with the cage 18 stopped at the position shown in FIG.
At the same time, it rotates together with the rotating rail 21. This results in
The cage 18 is guided by the traverse guide rails 22 and can traverse within the traverse passage 16. Further, as shown in FIG. 4, the holding part 44 rotatably supports a pair of auxiliary rollers 48, and when the cage 18 moves in the ascending and descending directions, and when the cage 18 moves horizontally, the holding section 44 comes into contact with each guide rail. It is designed to guide the movement of 18.

As shown in FIGS. 2 and 5, a plurality of electromagnets 50 are disposed at four locations on the outside of the wound of the four lifting guide rails 20 in the building over the entire length of the lifting passage 14.

In addition, a permanent magnet 52 corresponds to the electromagnet 50 in the cage 1.
The plate 49 protrudes from the four corners of the frame 8 and is attached to the stay 51 with reinforcement.

The electromagnet 50 and the permanent magnet 52 are maintained at a predetermined distance by a lifting guide rail 20.

As a result, the electromagnet 50 and the permanent magnet 52 are
An elevating linear motor 54 (see FIG. 6) is configured, with the permanent magnet 52 serving as a stator and the permanent magnet 52 serving as a movable element. This linear motor 54 operates by controlling the magnitude and frequency of the alternating current flowing through the electromagnet 50 by the control device 40.
The cage 18 is moved in the ascending and descending directions within the elevating passage 14, and its movement is stopped.

Note that the vertical force generated between the electromagnet 50 and the permanent magnet 52 at this time is canceled because they repel each other on the front and back surfaces of the cage 18, and the driving force for raising and lowering the cage 18 is distributed equally from the four corners of the cage 18. Granted.

Further, as shown in FIG. 5, a plurality of electromagnets 56 corresponding to the permanent magnets 52 are arranged along the traverse path 16 in the vicinity of the traverse guide rail.

The intersecting portions of the electromagnets 56 and 50 correspond to the permanent magnets 52 and serve as variable stators constituting the linear motors 54 and 60, respectively.

Further, the electromagnet 56 and the permanent magnet 52 (see FIG. 1) are maintained at a predetermined distance by a traverse guide rail 22,
As a result, the electromagnet 56 and the permanent magnet 52 constitute a traverse linear motor 60 (see FIG. 6), and its operation is controlled by the control device 40 in the same manner as the linear motor 54.

A brake device f62 protruding from the cage 18 is attached to the cage 18 (see FIG. 2). The brake device 62 has the role of stopping the movement of the cage 18, and stops the elevator guide rail 20 by sandwiching it between brake shoes (not shown).

As shown in FIG. 2, a power supply line 64 is disposed near the center of the lifting passage 14 along the lifting passage 14. As shown in FIG.

A current collecting shoe 66 is attached to the cage 18 in correspondence with the power supply line 64 and comes into contact with the power supply line 64 (see FIG. 5). Electric power is supplied to the cage 18 from a power supply line 64 through the current collector shoe 66, and is used to operate lighting inside the cage 18, a motor (not shown) for opening and closing the door 68, and the like. Further, an information cable 70 is disposed near the power supply line 64 along the lifting passage 14. information cable 7
0 is composed of a leaky coaxial cable, and radiates the signal being transmitted to the surroundings as leakage magnetic flux, and receives a signal from the cage 18, which will be described later.

An antenna 72 that receives signals leaked from the information cable 70 is attached to the cage 18, which enables communication between the inside of the cage 18 and the outside.
The position of the cage 18 is detected.

As shown in FIG. 6, the information cable 70 connects to the control device 40.
It is connected to the. The control device 40 has an information cable 70
The positional information of each cage 18 detected through is manually inputted. Also, installed inside the cage 18 are an operation panel 74 operated by the occupant, a sensor 76 for detecting the presence or absence of an occupant inside the cage 18, and a transmitting device (not shown).

The sensor 76 includes, for example, an infrared sensor that emits infrared rays to detect the presence or absence of an occupant. When the destination floor is specified by the passenger operating the control panel,
This destination floor is transmitted as a signal from the above-mentioned transmitting device and inputted to the control device 40 via the information cable 70. Further, the output signal of the sensor 76 is also input from the transmitting device to the control device 40 via the information cable 70.

Further, a call button 78 for a user of the elevator device to call the car 18 is installed in the waiting space of each floor. Each call button 78 is connected to the control device 40
It is connected to the. The control device 40 detects the call of the cage 18 by the user when the call button 78 is operated.

Next, the operation of this embodiment will be explained with reference to the flowchart of FIG.

In step 100, it is determined whether or not there is movement of the cage 18 in the transverse direction during the movement route for moving the cage 18 to the target floor. If it is determined that there is no movement in the transverse direction, the rotating rail is not activated, and in step 116, the elevating linear motor 54 composed of the permanent magnet 55 and the electromagnet 50 is activated to move the cage 18 in the upward or downward direction. and stop at the target floor.

If it is determined that there is movement in the transverse direction, step 10
2, the cage 18 is moved to the floor where it can be traversed, and the cage 18 is stopped at the connection between the elevating passage 14 and the traversing passage 16 by the elevating linear motor 54 and the brake device 62. In this state, each roller 46 corresponds to the rotating rail 21 and clamps the rotating rail 21. In step 104, the linear motor 38 for rotating the rail is operated, and the cage 1
The rollers 46 attached to the rollers 8 are rotated around the holding parts 44, and the rotating rail 21 is connected to the traversing guide rail 22. This allows the cage 18 to move in the lateral direction. When this rotating rail rotates 210 times,
Brake device 6 that was holding the lifting guide rail 20
2 to the cage 18 side. In addition, the brake device 6
2 is attached to a holding part 44 that pivotally supports a pair of rollers 46 so that it can rotate integrally with the holding part 44, and the brake device 6
2, the vicinity of the portion of the guide rail held between the pair of rollers 46 may be held between the brake shoes. This eliminates the need to retract the brake device 62 when the rotating rail 21 rotates, and
When the cage 18 is traveling horizontally, the cage 18 can be stopped by holding the traveling guide rails 22.

In step 106, it is determined whether there is an occupant in the cage 18. If there is an occupant in the cage 18, in step 108, the traverse linear motor 60, which is composed of a permanent magnet 52 and an electromagnet 56, is activated to accelerate the cage 18 so that the maximum value of the acceleration applied to the cage 18 is small, and to reduce the deceleration. The vehicle is controlled to be decelerated so that the maximum value is reduced and to stop at the intended elevation passage 14. If there is no occupant in the cage 18, the traversing linear motor 60 is operated in step 110, and the cage 18 is controlled to accelerate with a large acceleration, move to the intended elevator passageway 14, and stop with a large deceleration. . Thereby, compared to the case where there is a passenger inside the cage 18, it is possible to shorten the time it takes to move within the traverse passageway 16.

When the cage 18 moves to the intended elevation passage 14 and stops, the rail rotation linear motor 38 is activated in step 112 to rotate the rotary rail 21 to a position where it connects to the elevation guide rail 20. Step 11
4, the elevating linear motor 54 is activated, and the cage 18
move in the upward or downward direction and stop at the desired floor.

In this way, in this embodiment, linear motors are configured at the four corners of the cage 18, so that the vertical force generated between the stator and the mover can be eliminated, and the driving force for the cage to move up and down and move horizontally is evenly applied. can. Furthermore, since the movable element can be mounted in a smaller structure, the weight of the cage 18 as a whole can be reduced, and a stable moving speed can be maintained.

Moreover, the rotating rail 21 can be connected to the lifting guide rail 20 or the traversing guide rail 22, and the rotating rail 21 can be connected to the lifting guide rail 20 or the traversing guide rail 22.
Since the roller 46 is also rotated together with the rotation of the cage 18, it is easy to change the moving direction of the cage 18.

Furthermore, since the guide rails and rollers move in mesh with each other, shaking vibrations of the cage are suppressed and falling off is also prevented.

Further, in this embodiment, the elevating linear motor 54 is of a synchronous type and is composed of an electromagnet 50 and a permanent magnet 52, but the structure of the elevating linear motor 54 is not particularly limited to this. For example, an induction type linear motor may be used instead of the permanent magnet 52 using an iron plate coated with aluminum, or a synchronous type linear motor may be used instead of the permanent magnet 52 using an electromagnet.

As described above, in the present invention, it is possible to use either the induction type or the synchronous type as the type of the elevating linear motor 54 and the traversing linear motor 60.

〔Effect of the invention〕

As explained above, since the elevator drive device according to the present invention is disposed at the four corners of the car or is configured with a near motor, the driving force for moving the car can be applied evenly and efficiently, and the driving force for moving the car can be applied evenly and efficiently. Allows for smooth movement.

This also eliminates the vertical force that occurs between the stator and mover, and simplifies the structure of the mover installation.
The weight of the entire cage can be reduced, resulting in stable movement of the cage.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a building in which the elevator system according to the present embodiment is installed, Fig. 2 is a perspective view showing the vicinity of the connection between the lifting shaft and the traversing shaft, and Fig. 3 shows the vicinity of the rotating rail. 4 is a side view showing the vicinity of the rotating rail, FIG. 5 is a schematic top view of the vicinity of the connection between the elevating shaft and the traversing shaft, FIG. 6 is a schematic block diagram of the elevator system, and FIG. 7 is a flowchart illustrating control when moving a cage. 14... Elevating passage, 16... Traverse passage, 18... Cage, 50... Electromagnet (stator), 52... Permanent magnet (mover).

Claims (1)

[Claims] (1) An elevator drive device for moving a cage movably arranged in a cage passageway having a plurality of elevator passageways and a traversing passageway that communicates between the elevator passageways, the cage a movable element fixed to the cage so as to protrude from near both ends of both sides of the cage along the transverse direction of the cage; An elevator drive device comprising: a stator that raises and lowers a car via the movable element when excited.