JP2000344448A - Double deck elevator equipment - Google Patents

Abstract

(57) [Problem] To provide a double-deck elevator apparatus capable of easily and easily adjusting a distance between a first elevator car and a second elevator car. SOLUTION: The double deck elevator device has an outer frame 1.
1st elevator car 2 vertically arranged in 1
3a and a second elevator car 23b. The outer frame 11 is moved up and down via a suspension rope 16. The outer frame 11 has a first screw shaft 19a that engages with the car frame 22a that supports the first elevator car 23a, and a second screw shaft that engages with the car frame 22b that supports the second elevator car 23b. 19b is provided rotatably. The first screw shaft 19a and the second screw shaft 19b are reversely screwed to each other.
Driven by By the rotation of the transmission member 19, the interval between the two elevator cars 23a and 23b is adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-deck elevator apparatus having two elevator cars at the top and bottom, wherein the distance between the elevator cars can be varied.

[0002]

2. Description of the Related Art In recent years, there has been a growing need for an elevator apparatus (double deck elevator apparatus) having two elevator cars provided in an up-down direction in order to enhance the vertical transportation capacity of a skyscraper. Also,
In high-rise buildings, the upper floor is often higher than the normal floor due to the entrance hall or lobby on the first floor of the design, and the double deck elevator system where the distance between the upper and lower elevator cars is fixed. May not be adopted.

[0003] In order to respond to such needs, there have been proposed several types of double-deck elevators that change the distance between the upper and lower elevator cars.
As an example, as shown in FIG. 9, an outer frame 3 incorporating upper and lower elevator cars 4 and 5 is lifted and lowered by a hoisting machine 2 provided above a hoistway 1, and a motor and the like provided on the outer frame 3 Some elevator cars 4, 5 are moved up and down with respect to the outer frame 3 by a drive source, and the distance between the cars is changed (Japanese Patent Laid-Open No. 48-5384).

Further, as shown in FIG. 10, a mechanism for changing the interval between the upper and lower elevator cars 4 and 5 by a pantograph mechanism 6 having a fulcrum at an intermediate beam 3a of the outer frame 3 has been proposed (Japanese Patent Laid-Open No. Hei 10-279231). issue).

[0005]

In the above-described double deck elevator apparatus shown in FIG. 9, the height of the floor can be adjusted.
Or, in order to raise and lower the total weight of 5, a large-capacity driving means is required. On the other hand, in the variable double deck elevator shown in FIG. 10, the upper and lower cars are balanced by the pantograph mechanism 6, and the capacity required for driving is suppressed to a small value. However, it is necessary to strengthen the outer frame 3, and in particular, the intermediate beam 3 a supporting the fulcrum of the pantograph mechanism 6 is
In order to support the total weight of the upper and lower cabs 4 and 5, the cabs must be particularly strong, and the entire frame is large, resulting in poor space efficiency.

The present invention has been made in view of the above points, and is a double-deck elevator apparatus having two elevator cars, in which the interval between the elevator cars can be easily and easily changed. It is intended to provide a double deck elevator device.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a double-deck elevator apparatus having a first elevator car and a second elevator car arranged vertically.
A support that is lifted and lowered via a suspension rope suspended over a hoist; a first screw shaft rotatably provided on the support and engaged with an engagement portion of a first elevator car; First
A transmission member having a second screw shaft connected to the screw shaft of the second elevator car and engaged with the engaging portion of the second elevator car and threaded in a direction opposite to the first screw shaft; A double-deck elevator apparatus, comprising: a fixed drive mechanism that rotationally drives the transmission member.

According to the present invention, since the loads of both elevator cars are supported by the support, the entire apparatus can be reduced in weight and size by strengthening only the support. Also, the first
Since the direction of threading of the first screw shaft for supporting the weight of the elevator car is opposite to the direction of threading of the second screw shaft for supporting the weight of the second elevator car, the first elevator car is The second elevator car and the second elevator car serve as counterweights, and the capacity of the drive mechanism can be reduced.

The present invention is characterized in that the engaging portion between the first screw shaft and the first elevator car and the engaging portion between the second screw shaft and the second elevator car constitute a ball screw structure. Is a double deck elevator device.

According to the present invention, the driving efficiency for adjusting the interval between the elevator cars is improved, and the driving can be performed with small power.

According to the present invention, there is provided a double deck elevator apparatus wherein the pitches of the first screw shaft and the second screw shaft are different from each other.

According to the present invention, it is possible to cope with the weight mismatch between the first elevator car and the second elevator car. For example, it is possible to reduce the pitch of the upper screw shaft and increase the pitch of the lower screw shaft. This makes it possible to reduce the overhead dimension when both elevator cars are brought closer to each other.

According to the present invention, at least one of the engaging portion of the first elevator car and the engaging portion of the second elevator car has a nut engaged with the first screw shaft or the second screw shaft, and a nut. And a joint that restricts the rotational movement of the nut and allows the nut to move horizontally.

According to the present invention, when the first elevator car and the second elevator car are operated in the up-down direction, no excessive force acts on the transmission member.

According to the present invention, a pair of transmission members are provided, and each transmission member is arranged point-symmetrically with respect to the center of gravity of the first elevator car and the second elevator car when viewed from a plane. It is a deck elevator device.

According to the present invention, since the transmission members are arranged point-symmetrically with respect to the center of gravity, the elevator car interval can be adjusted in a well-balanced manner.

The present invention is a double deck elevator apparatus characterized in that the pair of transmission members are driven by a single drive mechanism.

According to the present invention, synchronous driving of the pair of transmission members is facilitated.

According to the present invention, the support comprises an outer frame surrounding the first elevator car and the second elevator car, and
And the second elevator car are guided along the outer frame.

According to the present invention, the first elevator car and the second elevator car are guided vertically along the outer frame so that the first elevator car and the second elevator car can be smoothly moved vertically. Can be moved.

According to the present invention, there is provided a double deck elevator apparatus wherein the support comprises a first elevator car and a suspension beam located above the second elevator car.

The present invention uses the first elevator car and the suspension beam located above the second elevator car instead of providing the outer frame as the support, so that the first elevator car corresponds to the outer frame. And the shape of the second elevator car can be made large.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment An embodiment of the present invention will be described below with reference to the drawings. 1 to 5 are views showing a first embodiment of a double deck elevator device according to the present invention.

As shown in FIGS. 1 to 3, the double-deck elevator apparatus has a first elevator car 23a and a second elevator car 23b which are continuously arranged in the hoistway 1 in the vertical direction. I have. When the first elevator car 23a located above stops at the upper floor 41, the second elevator car 23 located below is stopped.
b stops at the lower floor 42. Further, in order to cope with a case where the distance between the upper floor 41 and the lower floor 43 changes, the double deck elevator apparatus changes the distance between the first elevator car 23a and the second elevator car 23b. It can be.

That is, in the double-deck elevator apparatus, the outer frame (support) 11 and the counterweight 15 are suspended via the suspension ropes 16 suspended over the traction sheave 13 and the deflecting sheave 14 of the hoisting machine 12, Hoisting machine 1
2 to be moved up and down by the rotation drive. The outer frame 11 and the counterweight 15 are disposed in the hoistway 1, and the hoisting machine 12 having the traction sheave 13 and the deflection sheave 14 are disposed in the machine room 2 provided above the hoistway 1. Have been.

The above-described first elevator car 23a and second elevator car 23b are supported on the outer frame 11 so as to be vertically movable.

Next, the support structure of the outer frame 11, the first elevator car 23a and the second elevator car 23b will be described. The outer frame 11 has an upper beam 11a to which an end of a suspension rope 16 is connected via a pitch spring (not shown).
A vertical beam 11b connected to the upper beam 11a and extending vertically downward; and a lower beam 11c connecting the lower end of the vertical beam 11b, and further fixed to the upper beam 11a and protruding in opposite directions. And a supporting beam 11d. A drive motor (drive mechanism) 17 is supported on each of the pair of support beams 11d.

Each drive motor 17 includes a first screw shaft 19a protected by a housing 18 fixed to a support beam 11d, and a second screw shaft 19b connected to the first screw shaft 19a. Transmission member 19 having the first
The screw shaft 19a and the second screw shaft 19b each have a flange 4
They are connected via 5a and 45b. The lower end of the second screw shaft 19b is connected to a support 20 fixed to the vertical beam 11b.
It is supported rotatably.

Further, the first screw shaft 19a and the second screw shaft 1
9b, each screw is formed by threading in the opposite direction, and constitutes a relationship of the opposite screw with each other. Further, a nut 25a of a car frame 22a supporting the first elevator car 23a is engaged with the first screw shaft 19a, and a car frame supporting the second elevator car 23b is supported on the second screw shaft 19b. The first elevator car 23a and the second elevator car 23b are engaged by the first screw shaft 19a and the second screw shaft 19b via the car frames 22a and 22b in this manner. Supported.

A guide device 10 having guide rollers engaged with a pair of main guide rails 50 provided in the hoistway 1 is attached to the outer frame 11 at four positions, that is, up, down, left and right.
The outer frame 11 is guided by the guide device 10 engaging with the main guide rail 50. In addition, each car frame 22a,
Guide devices 21 that engage with the vertical beams 11b of the outer frame 11 are respectively attached to four locations, that is, up, down, left, and right. Furthermore, the counterweight 15 also has a guide device that engages with a pair of sub guide rails (not shown).

Further, referring to FIGS. 4 and 5, the first elevator car 23a and the second elevator car 23b will be described.
Will be described. In FIG.
An output shaft 17a of the drive motor 17 fixed to d is connected to a first screw shaft 19a via a connecting shaft 26.
In this case, the first screw shaft 19a is protected by the housing 18 fixed to the support beam 11c.
8 is rotatably supported via a bearing 27. Further, a flange 45b of a second screw shaft 19b, which is reverse-threaded to the first screw shaft 19a, is connected to a flange 45a at a lower end of the first screw shaft 19a, and a second screw shaft is formed. The lower end of 19b is rotatably supported by a support 20 provided on the vertical beam 11b via a bearing 48.

The nuts 25a and 25b engaged with the first screw shaft 19a and the second screw shaft 19b are connected to a translationally movable joint 46.
a, a rectangular block 29 having a rectangular hole for slidingly supporting the rectangular block 29 in one direction and having a rectangular outer shape; and moving the slider 30 perpendicular to the sliding direction of the rectangular block 29. The mounting member 31 has a rectangular hole that slides and supports in the direction in which the mounting member 31 moves, and a lid 32 provided in the vertical direction of the mounting member 31. Each joint 46 is connected to the car frame 22 of the first elevator car 23a.
a and the car frame 22b of the second elevator car 23b
The first elevator car 23a and the second elevator car 23b are connected by the joint 46.
Even if a slight horizontal displacement occurs between the transmission member 19 and the transmission member 19, the displacement can be absorbed. The joint 46 and the nuts 25a and 25b form an engagement portion between the first elevator car 23a and the second elevator car 23b.

Next, the operation of the present embodiment having such a configuration will be described. First, when the hoisting machine 12 is driven, the hanging rope 16 wound around the sheaves 13 and 14 is used.
As a result, the outer frame 11 moves up and down along the guide rail 50.
At this time, the nut 25 is attached to the first screw shaft 19a by the weight of the first elevator car 23a and the car frame 22a.
a, for example, a clockwise torque is applied to the screw shaft 19b, which is directly connected to the first screw shaft 19a, by the weight of the second elevator car 23b and the car frame 22b. Of torque is given. At this time, the weights of both elevator cars 23a, 23b, both car frames 22a, 22b, and both screw rods 19a, 1
When the screw pitches of 9b are equal, the torques of the first screw shaft 19a and the second screw shaft 19b are cancelled, and the positions of both elevator cars 23a and 23b are kept constant without the drive motor 17 outputting the torque. Can be held.

Also, both elevator cars 23a, 23b
And the weights of the car frames 22a and 22b are all changed by the upper beam 11a via the first screw shaft 19a and the second screw shaft 19b.
Is supported by the support beam 11c fixed to the outer frame 11
If only the upper beam 11a is reinforced, no structural problem occurs.

Next, the first elevator car 23a and the second
The function of changing the distance between the elevator car 23b and the elevator car 23b will be described. First, when each drive motor 17 is rotated, each transmission member 19 rotates, for example, a cage frame 22a having a nut 25a engaged with the first screw shaft 19a.
Rises and engages the second screw shaft 19b with the nut 25b.
Is lowered. At this time, each car frame 2
2a and 22b are the vertical beams 1 of the outer frame 11 by the guide device 21.
It is guided along 1b and moves up and down.

As the car frames 22a and 22b move in the vertical direction, the first elevator car 23a and the second elevator car 23b move in the vertical direction.
The distance between 3a, 23b changes from h to h ', and each car 23a, 23b can land on a floor 41, 42 with a different floor height.

Further, the first elevator car 23a and the second elevator car 23b or the car frame 22
a and 22b are not equal in weight, and the upper and lower cages 23
If it is desired to change the moving distances of a and 23b, it is possible to respond by changing the pitch between the first screw shaft 19a and the second screw shaft 19b.

For example, by reducing the pitch of the first screw shaft 19a and increasing the pitch of the second screw shaft 19b, it is possible to reduce the overhead dimension when the elevator cars 23a and 23b are brought closer. .

Further, when the screw shafts 19a, 19b are rotated and raised and lowered, a slight displacement occurs in the horizontal direction between the screw shafts 19a, 19b and the elevator cars 23a, 23b.
Even if the positions of the car frames 22a, 22b are slightly changed in the horizontal plane with respect to the nuts 25a, 25b, they are orthogonal to each other on the horizontal plane between the rectangular block 29 and the slider 30, and between the slider 30 and the mounting member 31. Since sliding occurs in two directions, no excessive lateral load is applied to the screw shafts 19a and 19b. If ball screws are used for the screw shafts 19a and 19b and the nuts 25a and 25b, efficient driving with less friction can be achieved. Furthermore, by arranging the drive motor 17 and the screw shafts 19a and 19b at point-symmetric positions with respect to the center of gravity of the first elevator car 23a and the second elevator car 23b on a horizontal plane, a well-balanced drive is possible. Becomes

According to the present embodiment, the first elevator car 2 is mounted on the outer frame 11 guided by the guide rail.
Screw shafts 19a, 19a, 1a, and 3a and the second elevator car 23b are directly coaxially connected with different screw cutting directions.
By driving the elevator car 9b, the interval between the elevator cars 23a and 23b can be easily and easily adjusted.

Second Embodiment Next, a second embodiment of the elevator apparatus according to the present invention will be described with reference to FIGS.

The embodiment shown in FIG. 6 and FIG.
In the first embodiment shown in FIG. 5 to FIG. 5, a reduction gear 33 is provided between each drive motor 17 and the screw shafts 19a and 19b (see FIG. 6), or a single drive motor 17 is provided.
And the power of the drive motor 17 is supplied to the other drive mechanism 5.
1 through the toothed belt 34 (see FIG. 7). 6 and 7, the same parts as those in the first embodiment shown in FIGS. 1 to 5 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 6, by providing the speed reducer 33, the rotation speed of the screw shafts 19a and 19b can be kept low, so that it is easy to avoid the dangerous speed which becomes a problem when using the long screw rod 19. Becomes

In FIG. 7, since only one drive motor 17 is used, there is no need to take into consideration control such as securing the synchronization of the two drive motors.

Third Embodiment Next, a third embodiment of the elevator apparatus according to the present invention will be described with reference to FIG. In the present embodiment, a suspension beam 35 is provided as a support instead of the outer frame 11. 8, the same parts as those in the first embodiment shown in FIGS. 1 to 5 are denoted by the same reference numerals, and detailed description is omitted.

In FIG. 8, a suspension beam 35 is provided at the end of the suspension rope 16, and a guide device 10 guided by a guide rail 50 is attached to each of four corners of the suspension beam 36. Further, at both ends of the suspension beam 35, support bases 36 project in directions different from each other, and support the drive motors 17, respectively. A first screw shaft 19a protected by the housing 18 is supported below the two support bases 36, and the first screw shaft 19a is attached to the first screw shaft 19a.
A second screw shaft 19b threaded in the opposite direction is connected by flanges 45a and 45b, and a stopper 37 is fixed to the lower end of the second screw shaft 19b.
Further, the car frame 22a supports the first elevator car 23a and the nut 2 engaging with the first screw shaft 19a.
The guide device 21 is provided at the upper and lower four corners of the car frame 22a.
The car frame 22b has a nut 25b that supports the second elevator car 23b and engages with the screw shaft 19b. The car frame 22b is provided with guide devices 21 that are guided by the main guide rail 50 at four upper and lower corners. Have been.

The drive mechanism of the elevator cars 23a and 23b is the same as that of the first embodiment (see FIG. 4). The output shaft 17a of the drive motor 17 is connected to the housing 18 via the connecting shaft 26 and the bearing 27 via the bearing 27. And is connected to a first screw shaft 19a rotatably supported. Further, a second screw shaft 19b, which is reverse-threaded, is connected to the first screw shaft 19a via flanges 45a, 45b, and a stopper 37 is provided at a lower end of the second screw shaft 19b. ing.

The nuts 25a and 25b engaged with the screw shafts 19a and 19b have a rectangular block 29 to which the nuts 25a and 25b are fixed, and a rectangular hole for slidingly supporting the rectangular block 29 in one direction. Is a rectangular slider 30, a mounting member 31 having a rectangular hole for slidingly supporting the slider 30 in a direction perpendicular to the sliding direction of the rectangular block 29, and a lid 32 provided in the vertical direction of the mounting member 31. The configured translatable joint 46 is connected, and the joint 46 is connected to the car frame 22a of the first elevator car 23a and the car frame 22b of the second elevator car 23b.

In FIG. 8, since the suspension beam 36 is provided instead of the outer frame 11 as a support, the outer frame 11 becomes unnecessary, and in the case of the same hoistway shape, large elevator cars 23a and 23b are provided. be able to.

[0050]

As described above, according to the present invention,
The first elevator car is driven by a first screw shaft that is driven to rotate, and the second elevator car is driven by a second screw shaft that is coaxially coupled to the first screw shaft and is threaded in the opposite direction. By driving, it is possible to adjust the interval between the upper and lower elevator cars in an energy-saving and space-saving configuration.

Also, by using ball screws for the first screw shaft and the second screw shaft, the elevator car can be efficiently driven.

When the elevator cars are driven by the screw shafts having different pitches, the weights of the upper and lower elevator cars are not equal, or the upper and lower elevator cars cannot be moved evenly due to the influence of the hoistway dimensions and the like. , Can effectively adjust the spacing between elevator cars.

Further, by supporting the nut engaged with the screw shaft only in the rotational direction and supporting it with a joint capable of horizontal movement, no excessive force is applied to the transmission member.

Also, the first elevator car and the second elevator car
By disposing the transmission member at a position substantially symmetrical with respect to the center of gravity of the elevator car, the elevator car can be driven stably.

Further, by providing a single drive mechanism, the pair of transmission members can be driven synchronously, and the elevator car can be driven stably.

Further, by guiding the elevator car along the outer frame, the elevator car can be driven stably.

By providing a hanging beam instead of the outer frame, a large-sized elevator car can be provided.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing a first embodiment of an elevator apparatus according to the present invention.

FIG. 2 is an explanatory diagram of the operation of the elevator apparatus.

FIG. 3 is a detailed view around the upper beam of the elevator apparatus.

FIG. 4 is a detailed view showing a driving mechanism of the elevator apparatus.

FIG. 5 is a detailed view showing a nut and a joint of the elevator apparatus.

FIG. 6 is a configuration diagram showing a second embodiment of the elevator apparatus according to the present invention.

FIG. 7 is a diagram showing a modification of the second embodiment of the elevator apparatus according to the present invention.

FIG. 8 is a configuration diagram showing a third embodiment of the elevator apparatus according to the present invention.

FIG. 9 is a diagram showing a conventional elevator device.

FIG. 10 is a diagram showing a conventional elevator device.

[Explanation of symbols]

 10, 21 Guide device 11 Outer frame 11a Upper beam 11b Vertical beam 11c Lower beam 11d Supporting beam 12 Hoisting machine 13 Traction sheave 14 Deflection sheave 15 Counterweight 16 Suspension rope 17 Drive motor 18 Housing 19a First screw shaft 19b First 2 screw shaft 20 support stand 22a first elevator car frame 22b second elevator car frame 23a first elevator car 23b second elevator car 25a, 25b nut 26 connecting shaft 29 rectangular block 30 slider 31 mounting member 32 lid 33 speed reducer 34 toothed belt 35 suspension beam 36 support base 37 stopper 46 joint 50 guide rail

Claims (8)

[Claims] 1. A double-deck elevator apparatus having a first elevator car and a second elevator car arranged in a vertical direction, a support member which is lifted and lowered via a suspension rope suspended over a hoist; A first screw shaft rotatably provided on the support and engaging with an engaging portion of the first elevator car;
A transmission member having a second screw shaft coupled to the screw shaft of the second elevator car and engaged with the engaging portion of the second elevator car and threaded in a direction opposite to the first screw shaft; A double-deck elevator apparatus, comprising: a drive mechanism fixedly rotating the transmission member. 2. A ball screw structure wherein an engaging portion between the first screw shaft and the first elevator car and an engaging portion between the second screw shaft and the second elevator car constitute a ball screw structure. The double deck elevator apparatus according to claim 1. 3. The double-deck elevator apparatus according to claim 1, wherein the pitches of the first screw shaft and the second screw shaft are different from each other. 4. At least one of the first elevator car engaging portion and the second elevator car engaging portion engages with a first screw shaft or a second screw shaft, and a rotation of the nut. The double-deck elevator apparatus according to claim 1, further comprising a joint that restricts movement and allows horizontal movement of the nut. 5. The transmission member according to claim 1, wherein a pair of transmission members are provided, and each transmission member is arranged point-symmetrically with respect to the center of gravity of the first elevator car and the second elevator car when viewed from a plane. The double deck elevator device as described. 6. The double deck elevator apparatus according to claim 5, wherein the pair of transmission members are driven by a single drive mechanism. 7. The support comprises an outer frame surrounding the first elevator car and the second elevator car, and the first elevator car and the second elevator car are guided vertically along the outer frame. The double-deck elevator apparatus according to claim 1, wherein: 8. The double-deck elevator system according to claim 1, wherein the support comprises a suspension beam located above the first elevator car and the second elevator car.