JP2000309482A - Elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide applicability to buildings different in floor levels and offering improved space efficiency and energy efficiency and increased speed and largo volume formation. SOLUTION: A suspension beam 13 to be elevated while being guided by a pair of main guide rails 15a, 15b and a balancing weight 6 to be elevated along another pair of sub-guide rails are connected to each other via a first suspension rope 4 so that the suspension beam 13 and the balancing weight can be elevated with a first hoisting machine. A first and second elevator cages 11, 12 arranged up and down to be elevated while being guided along the main guide rails 15a, 15b are connected to each other via a second suspension rope 18 driven to be elevated by a second hoisting machine 17 provided on the suspension beam 13 for elevation in mutually opposite directions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator apparatus having two cabs above and below and capable of changing floor height.

[0002]

2. Description of the Related Art In recent years, there has been an increasing need for a so-called double-deck elevator in which two elevator cars are connected to each other in order to enhance the vertical transportation capacity of a skyscraper. However, in such a skyscraper, from the design point of view, the first floor entrance hall or lobby is often a stairwell and the floor height is higher than the normal floor. It is impossible to use a double-deck elevator with fixed spacing as it is.

[0003] In order to respond to such needs, there have been proposed some double deck elevators that can change the distance between the upper and lower elevator cars.

FIG. 9 is a view showing one example of the above, and the hoistway 1
A hoisting machine 3 is installed in a machine room 2 provided at an upper part of the hoisting machine 3, and a double deck elevator outer frame 5 is connected to one end of a hanging rope 4 wound around a sheave of the hoisting machine 3, A counterweight 6 is connected to the other end of the suspension rope 4. And the double deck elevator outer frame 5
In addition, two elevator cars 7 and 8 are set up and down,
For example, the upper elevator car 7 can move up and down in the double deck elevator outer frame 5.

[0005] When necessary, the elevator car 7 is raised and lowered to raise the car 7 ', 8'.
And the distance between the cars can be changed. On the other hand, the elevator apparatus shown in FIG. 10 has upper and lower two elevator cars 7 and 8 movably mounted in a double deck elevator outer frame 5 respectively. 5 is connected to the upper end or lower end of a pantograph mechanism 10 having a fulcrum at the intermediate beam 9. Thus, by operating the pantograph mechanism 10, the upper and lower elevator cars 7, 8 can be moved in the approaching direction or the separating direction, and the interval between them can be changed.

[0006]

However, in the above-described conventional double-deck elevator apparatus, the floor height can be adjusted, but the height of the double-deck elevator can be adjusted within the outer frame of the double-deck elevator.
In order to arrange two elevator cars and raise and lower the elevator cars within the double deck elevator outer frame,
It is necessary to increase the cross-sectional area of the hoistway by the double-deck elevator outer frame 5, which requires a hoistway with a sufficient room for the floor area of the car, resulting in poor space efficiency.

[0007] In the elevator apparatus shown in FIG.
It is necessary to raise and lower the total weight of one elevator car to adjust the interval, and a large-capacity driving means is required.
On the other hand, in the elevator apparatus shown in FIG. 10, the pantograph mechanism takes the counterweight of the upper and lower elevator cars, so that the capacity required for driving can be kept small. The intermediate beams that support the elevator car must be particularly strong in order to support the total weight of the upper and lower elevator cars, and there are problems such as the space efficiency becoming worse.

In view of the foregoing, it is an object of the present invention to provide an elevator apparatus which can be applied to buildings having different floor heights, has good space efficiency and energy efficiency, can operate at high speed, and has a large capacity. .

[0009]

According to a first aspect of the present invention, there is provided a suspension beam which is guided by a pair of main guide rails to move up and down, a counterweight which moves up and down along another pair of sub guide rails, and the above-mentioned suspension beam. A first suspension rope for connecting the counterweight and lifting the lifting beam with the suspension beam by the first hoist; and first vertically disposed above and below each other, which is guided by the same main guide rail as the suspension beam and moves up and down. And a second suspension rope that is driven up and down by a second hoist provided on the suspension beam together with the second elevator car and connects the first and second elevator cars to each other and moves up and down in opposite directions to each other. It is characterized by having.

According to a second aspect of the present invention, in the first aspect, a second suspension rope having one end connected to the suspension beam is provided on the suspension beam via a pair of turning sheaves provided in the first elevator car. And is connected to the suspension beam again via a pair of turning sheaves provided in the second elevator car.

According to a third aspect of the present invention, in the second aspect, the position of the suspension rope exiting from the turning sheave provided in at least one of the first and second elevator cars is equal to the first and second positions. The two elevator cars are characterized by being point-symmetric with respect to the center of gravity of the elevator car in the horizontal plane.

[0012] In a fourth aspect based on the first aspect, the second aspect is provided.
Has a shaft having a length exceeding the width of the elevator car, and a pair of hanging ropes respectively connecting the first and second elevator cars are wound around sheaves provided at both ends of the shaft. It is characterized by having been done.

According to a fifth aspect of the present invention, in the first aspect, the second hoist comprises two sheave shafts each having a sheave provided at an outer end thereof, which are arranged on the same axis. A bevel gear provided at the inner end of the shaft is meshed with a bevel gear of a motor with a speed reducer, and a front side of a first elevator car, a rear side of a second elevator car, and a A pair of suspension ropes connecting a side rear portion of the first elevator car and a front side portion of the second elevator car are respectively wound around the sheave.

According to a sixth aspect of the present invention, in the first to fifth aspects of the present invention, an access limit is provided between the suspension beam and the first elevator car, and between the first elevator car and the second elevator car. And a shock absorber are provided.

In a seventh aspect based on the sixth aspect, the first elevator car and the second elevator car are suspended from the suspension beam.
And a pair of stepped rods having a stepped portion at a portion corresponding to the movement limit of the elevator car, and a buffer provided on the side surfaces of the first and second elevator cars to abut against the stepped portions of the stepped rods. A buffer device is constituted by the buffer member to be performed.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a diagram showing a schematic configuration of an elevator apparatus according to the present invention. FIG. 1A shows one elevator car 11 and a lower second elevator car 12 on a floor having different floor heights. Face when facing,
(B) has shown the case where both elevator cars 11 and 12 face the floor of the same floor height.

In FIG. 1A, a first suspending rope 4 is wound around a hoisting machine 3 installed above a hoistway 1, and one end of the first suspending rope 4 is suspended. The other end is connected to the counterweight 6 via the deflection sheave 14.

As shown in FIG. 2, the suspension beam 13 is engaged with main guide rails 15a and 15b attached to the inner wall of the hoistway 1 by brackets (not shown) via a guide device 16, and the main guide rails are provided. It can move up and down along 15a, 15b. The counterweight 6 is also guided by another auxiliary guide rail (not shown) attached to the inner wall of the hoistway 1 so as to be able to move up and down.

A second hoisting machine 17 is attached to the suspension beam 13, and a second hoisting machine 17 wound around the hoisting machine 17 is provided.
A first elevator car 11 and a second elevator car 12 provided above and below each other are connected to the suspension beam 13 by a suspension rope 18.

That is, the first elevator car 11 and the second elevator car 12 arranged at the upper and lower positions
Are engaged with the main guide rails 15a and 15b via guide devices 11a and 12a, respectively, and can be moved up and down along the main guide rails 15a and 15b. Is provided with a pair of turning sheaves 19a and 19b (see FIG. 3),
On the lower surface of the second elevator car 12, a pair of turning sheaves 20a and 20b are provided. And the second
The one end of the second suspension rope 18 wound around the hoisting machine 17 is provided with a hitch spring 21 at the bottom of the suspension beam 13 via a pair of turning sheaves 19a and 19b provided on the lower surface of the first elevator car 11. The other end is also connected to the bottom of the suspension beam 13 via a hitch spring 22 via turning sheaves 20 a and 20 b provided on the lower surface of the second elevator car 12.

The turning sheaves 19a, 19b and 20
a and 20b are elevator cars 1 in the horizontal plane, respectively.
The positions of the second suspension ropes 18 coming out of the turning sheaves 19a, 19b or 20a, 20b are located in a horizontal plane with respect to the center of gravity of each elevator car. At point symmetry.

When the hoisting machine 3 installed above the hoistway 1 is driven, the first hoisting rope 4 wound around the first hoisting machine 3 causes the suspension beam 13 and the suspension beam 13 to move. The connected first elevator car 11 and the second elevator car 12 are connected to the main guide rails 15a,
It goes up and down along 15b. On the other hand, at this time, the second hoisting machine 1
7 is driven counterclockwise in FIG. 1A, for example, the second suspension rope 18 wound around the second hoisting machine 17 lowers the first elevator car 11 and at the same time the second elevator The car 12 is raised, and the space between the elevator cars 11, 12 which was initially at H is set in FIG.
Is reduced to H 'as shown in FIG.

As shown in FIG. 2, supporting portions 13a are provided on both sides of the hanging beam 13 (only one of them is shown in FIG. 2). Steps 23a, 23b, 2 are provided at the movement limit of the first and second elevator cars 11, 12 with respect to
A pair of left and right stepped rods 23 having 3c is suspended. Above the side walls of the first and second elevator cars 11 and 12, buffer devices 24 and 25 are provided, respectively. The buffer device 24 provided in the first elevator car 11 is provided with step portions 23a and 23b. And the second elevator car 12
Is fitted to the stepped rod 23 between the steps 23b and 23c.

FIG. 4 is an enlarged perspective view of the suspension beam 13 and the upper part of the first elevator car 11, wherein the shock absorber 24 fitted to the stepped rod 23 has a shoe material on the inner periphery and has a shoe material therein. The stepped rod 23 has a stop piece 24a penetrating therethrough. Above and below the stop piece 24a, a buffer member 24b such as a spring is provided, and in the vicinity of the stop piece 24a, Stepped rod 23
Detecting device 26 such as a limit switch for detecting the step
(Only the upper detection device is shown in the figure).

The main guide rail 1 of the suspension beam 13
On both sides facing 5a and 15b, an emergency stop device 2 interlocked with a governor mechanism (not shown) via a governor rope
7 are provided. Further, as shown in FIG. 2, a buffer device 27 is provided on the pit floor, which is in contact with receiving stands 13 b provided on both sides of the suspension beam 13 when the elevator cars 11 and 12 are lowered to the lowest position. (Fig. 2).

When the relative movement of the first elevator car 11 and the second elevator car 12 is performed as described above, each step 23a,
23b and 23c serve as references for the positional relationship between the suspension beam 13 and the first and second elevator cars 11 and 12, respectively.

That is, when the first elevator car 11 approaches the suspension beam 13 while the second elevator car 12 descends, the shock absorbers 24 and 25 approach the steps 23a and 23c of the stepped rod 23, respectively. Then, the approach to the limit position is detected by the detection device 26, and the movement is stopped. When the elevator car further moves due to some abnormality, the stop piece 24a abuts on the stepped portion 23a or 23c via the buffer member 24b, the movement is stopped, and the distance between the elevator cars and the suspension beam is reduced. Is maintained at a predetermined value.

When the first elevator car 11 is lowered and the second elevator car 12 is raised to reduce the distance between the two cars, the shock absorbers 24 and 25 are connected to the steps of the stepped rod 23 respectively. When approaching the portion 23b, the approach to the limit position is detected by the detection device 26, respectively,
The movement is stopped. When the elevator cars 11 and 12 further move in the approaching direction due to some abnormality, the stop piece 24a is moved to the stepped portion 23 via the buffer member 24b.
The movement is stopped by contacting the upper or lower part of b.

By the way, also in the case where a control abnormality or a situation such as the cutting of the first suspension rope 4 occurs, the governor device (not shown) operates, and the emergency stop devices 27 provided on both sides of the suspension beam 13 operate. , Together with the operation of the stepped rod 23, the first and second elevator cars 11, 1
2 are braked without interfering with each other. Even when a sufficient braking distance is not left, the suspension beam 13 is supported by the buffer device 28 erected from the pit floor via the receiving base 13b, and braking is performed.

As described above, the main guide rails 15a, 15
b and the first and second elevator cars 11 guided to b.
Second hoisting machine 1 in which 12 is mounted on a suspension beam 13
7, there is no need to provide a double-deck elevator outer frame as in the prior art, space efficiency is high, and both elevator cars 11 and 12 supported by the second suspension rope 18 serve as counterweights to each other. Since it works, it is possible to adjust the floor height comfortably with energy saving. Also, the stepped rods provided on the suspension beams maintain the distance between the elevator cars, and the safety device ensures stability even in the event of an accident.

FIG. 5 is a view showing another embodiment of the present invention, wherein turning sheaves 19a and 19b are provided on the upper surface of the first elevator car 11, and turning sheaves are provided on the lower surface of the second elevator car 12. 20a and 20b are provided. FIG. 6 is a view showing still another embodiment, in which a turning sheave 1 is provided on the lower surface of a first elevator car 11.
9a and 19b are provided, and the second elevator car 12
Turning sheaves 20a and 20b are provided on the upper surface of the.

FIGS. 5 and 6 also show FIGS.
The same operation and effect as those shown in FIG. Further, in the apparatus shown in FIG. 5, since there is no turning sheave between the first elevator car 11 and the second elevator car 12, the interval between the two elevator cars can be reduced, and the invention is applied to a building having a low floor height. Becomes possible. 6, the turning sheave 19 is provided in a space left between the elevator cars 11 and 12 when the elevator cars 11 and 12 come closest to each other.
The turning sheaves 20a and 20b can be arranged side by side with the a and 19b, the height dimension can be reduced, and the invention can be applied to a building having restrictions on overhead dimensions and pit dimensions. Note that turning sheaves 19a, 19b and 20a, 20b can be provided on the upper surfaces of both elevator cars 11, 12, respectively. In this case, the present invention can be applied to a case where the pit size is limited.

FIG. 7 is a view showing another embodiment of the present invention. The suspension beam 13 is longer than the width of the first and second elevator cars 11, 12 and has sheaves 30a, 30b at both ends. Is mounted. The two-axis motor 31 is disposed slightly obliquely in the width direction through the positions of the centers of gravity of the first and second elevator cars 11 and 12, and both ends of the sheaves 30a and 30b are the first and second ends, respectively. The hanging ropes 18a and 18b connected to the elevator cars 11 and 12 are wound.

When the two-axis motor 31 provided with the sheaves 30a and 30b is driven, the suspension ropes 18a and 18b are driven.
As a result, the first and second elevator cars 11, 12 are moved up and down in opposite directions to each other, and the interval between them is changed. According to this embodiment, the suspension beam 13 and the first
The distance between the first elevator car 11 and the first elevator car 11 and the second elevator car 12 can be reduced, and the entire elevator apparatus can be made compact.

FIG. 8 is a view showing still another embodiment of the present invention. The suspension beam 13 has sheaves 30a, 30b at one end and bevel gears 32a, 32b at the other end.
Are provided on the same axis. The two shafts 33a and 33b are first and second shafts.
Are rotatably supported so as to pass almost directly above the centers of gravity of the elevator cars 11 and 12, and the bevel gears 32a and 32b
Are opposed to each other, and both bevel gears 32a, 32a
2b, a bevel gear 35 provided on the output shaft of a motor 34 with a reduction gear is meshed at the same time.

On the other hand, one end of the sheave 30a is connected to one rear portion of the first elevator car 11 and the other end is connected to the second elevator car 11.
A hanging rope 18a connected to a front portion of one side of the elevator car 12 is wound. In addition, a suspension rope 18b having one end connected to the other rear portion of the second elevator car 12 and the other end connected to the other front portion of the first elevator car 11 is wound around the sheave 30b.

When the motor 34 with a reduction gear is driven, the sheaves 30a and 30b rotate in opposite directions due to the engagement of the bevel gears 32a, 32b and 35. Therefore, the first and second elevator cars 11 and 12 are lifted and lowered in directions opposite to each other while being substantially suspended from the center of gravity, and the interval between them is changed. According to this embodiment, between the suspension beam 13 and the first elevator car 11 or between the first elevator car 11 and the second elevator car 12
The distance between them can be reduced, the center of gravity of the first and second elevator cars can be supported, and stable driving can be performed.

[0039]

As described above, according to the present invention, the first elevator car and the second elevator car are inverted with respect to each other by the second hoisting machine mounted on the suspension beam which is guided by the main guide rail and goes up and down. Since the elevator cars are raised and lowered in the directions, the height of both elevator cars can be adjusted and space can be saved. Further, the elevator car can be driven with small power by making the weights of the elevator cars act as counterweights to each other.
Furthermore, the position of the suspension rope coming out of the turning sheave provided in at least one of the first and second elevator cars is point-symmetric with respect to the center of gravity of the first and second elevator cars in the horizontal plane. By setting it in the position, stable and comfortable driving can be performed. In addition, by providing a detection device and a buffering device for detecting an approach limit between the suspension beam and the first elevator car and between the elevator cars, interference between the suspension beam and the elevator cars can be prevented. Safety can be improved.

[Brief description of the drawings]

FIGS. 1 (a) and 1 (b) show a schematic configuration of an embodiment of the present invention and explain the operation thereof.

FIG. 2 is a perspective view showing a configuration of an elevator car unit according to the embodiment of the present invention.

FIG. 3 is a diagram showing a second suspension rope according to the embodiment of the present invention in a pulled state;

FIG. 4 is a partial detailed view of FIG. 2;

FIG. 5 is a view showing another state of the second suspension rope in a drawn state.

FIG. 6 is a view showing still another drawing state of the second hanging rope.

FIG. 7 is a diagram showing another embodiment of the present invention.

FIG. 8 is a diagram showing still another embodiment of the present invention.

FIG. 9 is a diagram showing an example of a conventional double deck elevator.

FIG. 10 is a diagram showing another example of a conventional double deck elevator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hoistway 3 Hoist 4 First suspending rope 11 1st elevator car 12 2nd elevator car 13 Suspended beam 15a, 15b Main guide rail 17 2nd hoisting machine 18 2nd suspending rope 19a, 19b , 20a, 20b turning sheave 23 stepped rod 24, 25 shock absorber 26 detector 27 emergency stop device 28 buffer device 30a, 30b sheave 31 double shaft motor 34 motor with reduction gear

Claims (11)

[Claims] 1. A first hoist that connects a suspension beam that is guided by a pair of main guide rails to move up and down, a balance weight that moves up and down along another pair of sub guide rails, and the suspension beam and the balance weight. A first suspension rope for lifting and lowering the weight by balancing the suspension beam with the suspension beam; first and second elevator cars and a suspension beam, which are vertically arranged and guided by the same main guide rail as the suspension beam. And a second suspension rope that is driven up and down by a second hoist provided in the vehicle to connect the first and second elevator cars to each other and move up and down in opposite directions to each other. . 2. A second suspension rope, one end of which is connected to a suspension beam, is wound around a second hoist provided on the suspension beam via a pair of turning sheaves provided on the first elevator car. The elevator apparatus according to claim 1, further comprising a pair of turning sheaves provided on the second elevator car and connected to the suspension beam again. 3. The elevator apparatus according to claim 2, wherein a pair of turning sheaves are provided on lower surfaces of the first elevator car and the second elevator car, respectively. 4. An elevator car of one of a first elevator car and a second elevator car is provided with a pair of turning sheaves on a top surface thereof, and the other elevator car is provided with a pair of turning sheaves on a lower surface thereof. The elevator device according to claim 2, wherein a lift is provided. 5. The elevator apparatus according to claim 2, wherein a pair of turning sheaves are provided on top surfaces of the first elevator car and the second elevator car, respectively. 6. The position of a suspension rope coming out of a turning sheave provided in at least one of the first and second elevator cars in a horizontal plane with respect to the center of gravity of the first and second elevator cars. The elevator device according to any one of claims 2 to 5, wherein the elevator device is located at a point symmetric position. 7. A second hoist having a shaft having a length exceeding the width of the elevator car, and connecting the first and second elevator cars to sheaves provided at both ends of the shaft, respectively. The elevator apparatus according to claim 1, wherein a pair of suspension ropes is wound. 8. A second hoist in which two sheave shafts each having a sheave at an outer end are disposed on the same axis, and a bevel gear provided at an inner end of the sheave shaft is reduced. The first elevator car, the side rear part of the second elevator car, and the side rear part of the first elevator car and the second rear part. 2. The elevator apparatus according to claim 1, wherein a pair of hanging ropes connecting the front side portion of the elevator car are respectively wound around the sheave. 9. A device for detecting an approach limit and a shock absorber are provided between the suspension beam and the first elevator car, and between the first elevator car and the second elevator car. The elevator apparatus according to any one of claims 1 to 9, wherein the elevator apparatus is characterized in that: 10. A pair of stepped rods suspended from a suspension beam and having steps at portions corresponding to the movement limits of the first elevator car and the second elevator car;
And a buffer member provided on a side surface of the second elevator car and configured to buffer by contact with the stepped portion of the stepped rod.
The elevator device according to claim 10. 11. A suspension beam provided with an emergency stop device interlocking with a governor device via a governor rope provided in parallel with a hoistway, and a suspension beam is provided on a pit floor when an elevator car descends to a predetermined position. 2. The elevator device according to claim 1, further comprising a pair of buffer devices that abut and support the receiving table provided in the device.