JP4270642B2 - Elevator equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elevator apparatus that has two cabs at the top and bottom and can change the floor height.
[0002]
[Prior art]
In recent years, there has been a growing need for a so-called double-deck elevator in which two elevator cars are connected up and down in order to enhance the vertical transportation capacity of a skyscraper. However, in such high-rise buildings, the entrance hall or lobby on the first floor is often atrium from the viewpoint of design, and the floor height is often higher than the normal floor. It is impossible to directly adopt a double deck elevator with a fixed interval.
[0003]
Therefore, several proposals have been made regarding a double deck elevator that can change the distance between the upper and lower elevator cars to meet such needs.
[0004]
FIG. 9 is a diagram showing an example of this. A hoisting machine 3 is installed in a machine room 2 provided in the upper part of the hoistway 1, and a hanging rope wound around a sheave of the hoisting machine 3. A double deck elevator outer frame 5 is connected to one end of 4, and a counterweight 6 is connected to the other end of the suspension rope 4. The double deck elevator outer frame 5 is provided with two elevator cars 7 and 8 on the upper and lower sides. For example, the upper elevator car 7 can be raised and lowered within the double deck elevator outer frame 5.
[0005]
Therefore, if necessary, the elevator car 7 is moved up and down to position the cars 7 'and 8' so that the distance between the cars can be changed.
On the other hand, in the elevator apparatus shown in FIG. 10, two upper and lower elevator cars 7 and 8 are mounted in a double deck elevator outer frame 5 so as to be movable up and down, and both elevator cars 7 and 8 are installed in the double deck elevator outer frame. 5 is connected to the upper end or lower end of the pantograph mechanism 10 having a fulcrum on 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 distance between them can be changed.
[0006]
[Problems to be solved by the invention]
However, in the conventional double deck elevator device, the floor height can be adjusted, but two elevator cars are arranged in the outer frame of the double deck elevator, and the elevator car is moved up and down in the outer frame of the double deck elevator. Therefore, it is necessary to widen the cross-sectional area of the hoistway by the double deck elevator outer frame 5, and there is a need for a hoistway with a sufficient margin relative to the car floor area, resulting in problems such as poor space efficiency. is there.
[0007]
Further, in the elevator apparatus shown in FIG. 9, it is necessary to raise and lower the total weight of one elevator car for adjusting the interval, and a large-capacity driving means is required. On the other hand, in the elevator apparatus shown in FIG. 10, since the upper and lower elevator cars are balanced by the pantograph mechanism, the capacity required for driving can be kept small, but the outer frame has to be solid, and in particular the fulcrum of the pantograph mechanism The intermediate beam that supports the vehicle must be particularly strong in order to support the total weight of the upper and lower elevator cars, resulting in problems such as worse space efficiency.
[0008]
In view of such a point, the present invention has an object to obtain an elevator apparatus that can be applied to buildings having different floor heights, has high space efficiency and energy efficiency, and can be increased in speed and capacity.
[0009]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a lifting beam guided by a pair of main guide rails, a balance weight moving up and down along another pair of sub guide rails, and a balance weight and the balance weight. A first suspension rope that lifts and lowers the weight of the suspension beam by means of a machine, and first and second elevator cages that are guided by the same main guide rail as the suspension beam and that are lifted up and down. And a second hoisting rope which is driven up and down by a second hoisting machine provided on the beam and connects the first and second elevator cars to each other and moves up and down in opposite directions.
[0010]
According to a second invention, in the first invention, the second suspension rope having one end connected to the suspension beam is provided on the suspension beam via a pair of turning sheaves provided on the first elevator car. And is connected to the suspension beam again through a pair of turning sheaves provided in the second elevator car.
[0011]
According to a third aspect, in the second aspect, 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 the first and second elevators. It is characterized by a point-symmetrical position in the horizontal plane with respect to the center of gravity of the car.
[0012]
In a fourth aspect based on the first aspect, the second hoisting machine has a shaft having a length exceeding the width of the elevator car, and the sheaves provided at both ends of the shaft are respectively connected to the first and the second. A pair of hanging ropes connecting the second elevator car is wound around.
[0013]
Furthermore, a fifth invention is the first invention, wherein the second hoisting machine has two sheave shafts each having a sheave at the outer end arranged on the same axis, The bevel gear provided at the end is meshed with the bevel gear of the motor with a reduction gear, and the front side of the first elevator car, the rear side of the second elevator car, and the first elevator A pair of suspension ropes connecting the rear side portion of the car and the front side portion of the second elevator car are respectively wound around the sheave.
[0014]
According to a sixth aspect of the present invention, in the first to fifth aspects of the present invention, each approach limit is detected between the suspended beam and the first elevator car, and between the first elevator car and the second elevator car. A device and a shock absorber are provided.
[0015]
According to a seventh invention, in the sixth invention, a pair of stepped rods suspended from a suspension beam and having stepped portions at portions corresponding to the movement limits of the first elevator car and the second elevator car, The shock absorber is constituted by a shock absorbing member that is provided on a side surface of the second elevator car and shocks by abutting against the stepped portion of the stepped rod.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
[0017]
FIG. 1 is a diagram showing a schematic configuration of an elevator apparatus according to the present invention. FIG. 1 (a) shows that one first elevator car 11 and a lower second elevator car 12 face different floors. (B) has shown the case where both the elevator cars 11 and 12 face the floor of the same floor height.
[0018]
In FIG. 1 (a), a hoisting machine 3 installed above the hoistway 1 is wound with a first hanging rope 4, and one end side of the first hanging rope 4 is attached to a hanging beam 13. The other end side is connected to the counterweight 6 via the turning sheave 14.
[0019]
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 with brackets (not shown) via a guide device 16, and the main guide rails 15a and 15b. It can be moved up and down along. The counterweight 6 can also be lifted and lowered by being guided by other sub guide rails (not shown) attached to the inner wall of the hoistway 1.
[0020]
A second hoisting machine 17 is attached to the hanging beam 13, and the first elevator car 11 and the first elevator car 11 and the second hoisting rope 18 wound around the hoisting machine 17 are provided above and below each other. Two elevator cars 12 are connected to the suspension beam 13.
[0021]
That is, the first elevator car 11 and the second elevator car 12 arranged in the vertical position are engaged with the main guide rails 15a and 15b via the guide devices 11a and 12a, respectively, and the main guide rail 15a. 15b, a pair of turning sheaves 19a, 19b (see FIG. 3) is provided on the lower surface of the first elevator car 11, and the lower surface of the second elevator car 12 Is provided with a pair of turning sheaves 20a, 20b. Then, one end of the second suspension rope 18 wound around the second hoisting machine 17 passes through a pair of turning sheaves 19a and 19b provided on the lower surface of the first elevator car 11, and the bottom of the suspension beam 13 The other end is connected to the bottom of the suspension beam 13 via a hitch spring 22 via turning sheaves 20a and 20b provided on the lower surface of the second elevator car 12. Yes.
[0022]
The turning sheaves 19a, 19b and 20a, 20b are provided in the vicinity of a point-symmetrical position with respect to the center of gravity of the elevator cars 11, 12 in the horizontal plane, respectively, The position of the suspension rope 18 is point-symmetric in the horizontal plane with respect to the center of gravity of each elevator car.
[0023]
Thus, when the hoisting machine 3 installed above the hoistway 1 is driven, the hoisting beam 13 and the first hoisting rope 4 wound around the first hoisting machine 3 are connected to the hoisting beam 13. The first elevator car 11 and the second elevator car 12 move up and down along the main guide rails 15a and 15b. On the other hand, when the second hoisting machine 17 is driven counterclockwise in FIG. 1A, for example, the second hoisting rope 18 wound around the second hoisting machine 17 is moved to the first elevator car. 11 is lowered, and at the same time, the second elevator car 12 is raised, and the distance between the elevator cars 11 and 12, which was initially H, is reduced to H 'as shown in FIG.
[0024]
By the way, as shown in FIG. 2, support portions 13a are provided on both sides of the suspension beam 13 (only one of them is shown in the figure). A pair of left and right stepped rods 23 having step portions 23a, 23b, 23c are suspended from the movement limits of the first and second elevator cars 11, 12. Further, shock absorbers 24 and 25 are respectively provided on the upper side walls of the first and second elevator cars 11 and 12, and the shock absorbers 24 provided in the first elevator car 11 are provided with step portions 23a and 23b. The shock absorber 25 provided in the second elevator car 12 is fitted to the stepped rod 23 between the step portions 23b and 23c.
[0025]
FIG. 4 is an enlarged perspective view of the upper part of the suspension beam 13 and the first elevator car 11, and the shock absorber 24 fitted to the stepped rod 23 has a shoe material on the inner periphery thereof, and the stepped rod therein. 23 has a stop piece 24a that penetrates, and a buffer member 24b such as a spring is provided on the upper and lower portions of the stop piece 24a, respectively, and the stepped rod is arranged vertically in the vicinity of the stop piece 24a. A detection device 26 such as a limit switch for detecting 23 steps (only the upper detection device is shown in the figure) is provided.
[0026]
Further, on both surfaces of the suspension beam 13 that face the main guide rails 15a and 15b, an emergency stop device 27 that is interlocked via a governor mechanism (not shown) and a governor rope is provided. Further, as shown in FIG. 2, a buffer device 27 protrudes on the pit floor and contacts the receiving bases 13 b provided on both sides of the hanging beam 13 when the elevator cars 11 and 12 are lowered to the lowest position. Yes (Figure 2).
[0027]
Thus, when the first elevator car 11 and the second elevator car 12 are relatively moved as described above, the step portions 23a, 23b, and 23c of the stepped rod 23 are connected to the suspension beam 13 and the first beam. The second elevator car 11, 12 becomes a reference for the positional relationship.
[0028]
That is, when the first elevator car 11 approaches the hanging beam 13 while the second elevator car 12 descends, when the shock absorbers 24 and 25 approach the step 23a or 23c of the stepped rod 23, respectively, 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 comes into contact with the step portion 23a or 23c via the buffer member 24b, and the movement is stopped, and the distance between the elevator cars and the suspended beam is stopped. Is held at a predetermined value.
[0029]
Further, when the first elevator car 11 is lowered and the second elevator car 12 is raised and the distance between the two cars is reduced, the shock absorbers 24 and 25 are respectively attached to the step portion 23b of the stepped rod 23. When approaching, the detection device 26 detects the approach to the limit position, and 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 comes into contact with the upper part or the lower part of the step part 23b via the buffer member 24b and the movement is stopped.
[0030]
By the way, even when an abnormality such as control abnormality or cutting of the first suspension rope 4 occurs, the governor device (not shown) operates, the emergency stop devices 27 provided on both sides of the suspension beam 13 operate, and the step Along with the function of the rod 23, the first and second elevator cars 11, 12 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 cradle 13b, and braking is performed.
[0031]
Thus, the first and second elevator cars 11 and 12 guided by the main guide rails 15a and 15b are lifted and lowered by the second hoisting machine 17 mounted on the suspension beam 13, so that There is no need to install a double-deck elevator frame on the front, and space efficiency is good, and both elevator cars 11 and 12 supported by the second suspension rope 18 act as counterweights, so energy saving and comfortable ride height adjustment are possible. It can be performed. In addition, the distance between the elevator cars is maintained by the stepped rods provided on the hanging beam, and the safety is ensured even in the event of an accident by the emergency stop device.
[0032]
FIG. 5 is a diagram showing another embodiment of the present invention, in which turning sheaves 19a and 19b are provided on the upper surface of the first elevator car 11, and turning sheaves 20a and 20b on the lower surface of the second elevator car 12. Is provided. FIG. 6 is a view showing still another embodiment, in which turning sheaves 19a and 19b are provided on the lower surface of the first elevator car 11, and turning sheaves 20a and 20b on the upper surface of the second elevator car 12. Is provided.
[0033]
5 and 6 also have the same effect as that shown in FIG. Further, in the case 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 it is applied to a building with a low floor height. Is possible. Moreover, in what is shown in FIG. 6, when the both elevator cars 11 and 12 approach most, the turning sheaves 20a and 20b can be arranged side by side with the turning sheaves 19a and 19b, The height dimension can be reduced, and the present invention can be applied to a building having overhead dimension and pit dimension restrictions. In addition, turning sheaves 19a and 19b and 20a and 20b can be provided on the upper surfaces of the elevator cars 11 and 12, respectively. In this case, the present invention can be applied when the pit size is limited.
[0034]
FIG. 7 is a view showing another embodiment of the present invention. The suspension beam 13 is provided with sheaves 30a and 30b at both ends longer than the width dimension of the first and second elevator cars 11 and 12. A biaxial motor 31 is mounted. The both-axis motor 31 is disposed slightly obliquely in the width direction through the center of gravity of the first and second elevator cars 11, 12, and both ends of the sheaves 30a, 30b are first and second ends, respectively. Hanging ropes 18a and 18b connected to the elevator cars 11 and 12 are wound around.
[0035]
Thus, when the double-shaft motor 31 provided with the sheaves 30a and 30b is driven, the first and second elevator cars 11 and 12 are lifted and lowered in opposite directions by the suspension ropes 18a and 18b, and the distance between them is changed. . And according to this embodiment, the space | interval between the suspension beam 13 and the 1st elevator car 11, or the space | interval between the 1st elevator car 11 and the 2nd elevator car 12 can be made small, The elevator apparatus whole Can be made compact.
[0036]
FIG. 8 is a view showing still another embodiment of the present invention. The suspension beam 13 has two shafts 33a each having sheaves 30a and 30b at one end and bevel gears 32a and 32b at the other end. , 33b are arranged on the same axis. The two shafts 33a and 33b are rotatably supported so as to pass almost directly above the center of gravity of the first and second elevator cars 11 and 12, and the bevel gears 32a and 32b are opposed to each other. The bevel gears 35 provided on the output shaft of the motor 34 with a reduction gear are simultaneously meshed with both the bevel gears 32a and 32b.
[0037]
On the other hand, the sheave 30a is wound with a suspension rope 18a having one end connected to the one-side rear portion of the first elevator car 11 and the other end connected to the one-side front portion of the second elevator car 12. . In addition, a suspension rope 18b having one end connected to the rear side of the second elevator car 12 and the other end connected to the front side of the first elevator car 11 is wound around the sheave 30b.
[0038]
Thus, when the motor 34 with a speed reducer is driven, the sheaves 30a and 30b rotate in opposite directions due to the meshing of the bevel gears 32a, 32b, and 35. Accordingly, the first and second elevator cars 11 and 12 are suspended substantially at the center of gravity and moved up and down in opposite directions to change the distance therebetween. According to this embodiment, the distance between the suspension beam 13 and the first elevator car 11 or between the first elevator car 11 and the second elevator car 12 can be reduced, and the first and first The center of gravity of the elevator car of 2 can be supported and stable driving can be performed.
[0039]
【The invention's effect】
As described above, according to the present invention, the first elevator car and the second elevator car are lifted and lowered in the opposite directions by the second hoist mounted on the lifting beam guided by the main guide rail. As a result, it is possible to adjust the floor height of both elevator cars and to save space. Further, the elevator car can be driven with a small amount of power by causing the weights of the elevator cars to act as counterweights. Further, the position of the suspension rope coming out from the turning sheave provided in at least one of the first and second elevator cars is point-symmetric in the horizontal plane with respect to the center of gravity of the first and second elevator cars. By being in the position, stable and comfortable driving can be performed. In addition, interference between the suspension beam and the two elevator cars can be prevented by providing a detection device and a shock absorber for detecting the approach limit between the suspension beam and the first elevator car and between the two elevator cars. Safety can be improved.
[Brief description of the drawings]
FIGS. 1A and 1B are diagrams illustrating a schematic configuration of an embodiment of the present invention and explaining its operation.
FIG. 2 is a perspective view showing a configuration of an elevator car part in one embodiment of the present invention.
FIG. 3 is a diagram showing a state in which a second suspension rope is routed according to an embodiment of the present invention.
FIG. 4 is a partial detail view of FIG. 2;
FIG. 5 is a view showing another routed state of the second suspension rope.
FIG. 6 is a view showing still another routed state of the second suspension 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 view showing an example of a conventional double deck elevator.
FIG. 10 is a view showing another example of a conventional double deck elevator.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hoistway 3 Hoisting machine 4 1st suspension rope 11 1st elevator car 12 2nd elevator car 13 Suspension beam 15a, 15b Main guide rail 17 2nd hoisting machine 18 2nd suspension rope 19a, 19b , 20a, 20b Turning sheave 23 Stepped rods 24, 25 Shock absorber 26 Detection device 27 Emergency stop device 28 Buffer devices 30a, 30b Sheave 31 Double shaft motor 34 Motor with reduction gear

Claims (11)

  A suspension beam guided up and down by a pair of main guide rails, a balance weight moving up and down along another pair of sub guide rails, and the suspension beam connected to the suspension beam by the first hoist The first suspension rope for raising and lowering the counterweight, the first and second elevator cages that are guided by the same main guide rail as the suspension beam and that are elevated and lowered relative to each other, and the first provided on the suspension beam. An elevator apparatus comprising: a second suspension rope which is driven up and down by two hoisting machines and connects the first and second elevator cars to each other and moves up and down in opposite directions.   A second suspension rope, one end of which is connected to the suspension beam, is wound around a second hoisting machine provided on the suspension beam via a pair of turning sheaves provided on the first elevator car. The elevator apparatus according to claim 1, wherein the elevator apparatus is connected to the suspension beam again through a pair of turning sheaves provided in the elevator car.   The elevator apparatus according to claim 2, wherein a pair of turning sheaves are provided on the lower surfaces of the first elevator car and the second elevator car, respectively.   One of the first elevator car and the second elevator car is provided with a pair of turning sheaves on the top surface, and the other elevator car is provided with a pair of turning sheaves on the lower surface. The elevator apparatus of Claim 2 characterized by the above-mentioned.   The elevator apparatus according to claim 2, wherein a pair of turning sheaves are provided on the top surfaces of the first elevator car and the second elevator car, respectively.   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 in the horizontal plane with respect to the center of gravity of the first and second elevator cars. The elevator apparatus according to claim 2, wherein the elevator apparatus is provided.   The second hoisting machine has a shaft having a length exceeding the width of the elevator car, and a pair of suspension ropes connecting the first and second elevator cars to the sheaves provided at both ends of the shaft, respectively. The elevator apparatus according to claim 1, wherein the elevator apparatus is wound.   In the second hoisting machine, two sheave shafts each having a sheave at the outer end are arranged on the same axis, and the bevel gear provided at the inner end of the sheave shaft is used as the umbrella of the motor with a speed reducer. It is configured by meshing with a gear, and the front side of the first elevator car, the rear side of the second elevator car, the rear side of the first elevator car, and the front side of the second elevator car. The elevator apparatus according to claim 1, wherein a pair of suspension ropes that connect to the section are respectively wound around the sheave. A device for detecting a respective 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. Item 9. The elevator apparatus according to any one of Items 1 to 8 . A pair of stepped rods suspended from a suspension beam and having stepped portions at portions corresponding to the movement limits of the first elevator car and the second elevator car, and provided on the side surfaces of the first and second elevator cars; 10. The elevator apparatus according to claim 9 , wherein a shock absorber is constituted by a shock absorbing member that shocks by contacting with a step portion of the stepped rod.   An emergency stop device interlocking with the governor device is provided on the hanging beam via a governor rope provided in parallel with the hoistway, and when the elevator car is lowered to a predetermined position on the pit floor, a receiving device provided on the hanging beam is provided. The elevator apparatus according to claim 1, further comprising a pair of buffer devices that contact and support the table.

Images