JPH02106570A - Elevator - Google Patents

Abstract

PURPOSE:To reduce the installation space of an elevation passage by a method wherein a plurality of cages are elevatably arranged in one elevation passage, the cages are operated by individual rope drive systems, and operation is controlled according to the cage position and a call. CONSTITUTION:Two cages 2A and 2B off upper and lower cages are arranged in an elevation passage having a space for one cage. By arranging the cages in a rope having system as shown in a figure, the upper cage 2A forms roping of 1:1, and the cage 2B forms roping of 2:1. During running of the cage, floors serviced by the upper cage 2A range from a topmost floor to a lowermost floor + alpha, and floors serviced by the lower cage 2B range from the lowmost floor to the topmost floor - alpha. alpha is determined by the size of the cage, and usually approximately two floors. Service operation of the cage 2A is limited by the operation direction of the lower cage 2B. This decision is made by a control device 19, and a proper operation command is outputted to inverters 14A and 14B to operate the two cages.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an elevator that drives a plurality of cars in one hoistway.

[Prior Art] FIG. 2 is a longitudinal cross-sectional view of a hoistway of a conventional elevator in which the car is driven by a 1:10 ping of a traction type, for example.

In the figure, l is a hoistway, 2 is a car, and 3 is a counterweight placed on the side of the car 2, which is connected by a main rope 4.
It is guided by a guide rail (not shown). 5 is a drive network wheel for a hoisting machine (not shown) installed in the machine room 6;
Reference numeral 7 denotes a diversion sheave, and the main rope 4 is wound around the drive net sheave 5 and the diversion sheave 7. Reference numerals 8 and 9 denote a car shock absorber and a counterweight shock absorber installed at the bottom of the hoistway 1.

In the conventional elevator configured as described above, one car 2 and one counterweight 3 are guided by guide rails and alternately ascend and descend.

[Problems to be Solved by the Invention] In the conventional elevator as described above, only one car and one counterweight are arranged in one hoistway.

Therefore, when a plurality of cars are arranged side by side, a hoistway corresponding to the number of installed cars is required, which poses a problem in that the required space increases accordingly.

This invention was made to solve the above-mentioned problems, and provides an elevator that can reduce the planar space occupied by the hoistway in a building when multiple cars are installed together. The purpose is to

[Means for Solving the Problems] An elevator according to the present invention has a plurality of cars disposed in one hoistway so as to be vertically movable, each car being driven by a separate rope drive system, and The car is equipped with a control device that controls the operation of each car according to the car position and call.

[Function 1] In this invention, each car is roved by a separate rope drive system, and each car can be lifted and lowered from each car within one hoistway, saving the planar space of the hoistway. can be reduced.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

In this embodiment, there are two cars.

FIG. 1 is a configuration diagram of an elevator in which two cars can run in a hoistway that has a plane space for one car.

In the figure, an upper car 2A and a lower car 2B are arranged vertically in the hoistway 1, and these cars 2A and 2B can be raised and lowered by a common guide rail (not shown) provided in the hoistway 1. are guided by. Further, in the hoistway 1, there are counterweights 3A and 3 corresponding to the respective cars 2A and 2B.
B is arranged, and these counterweights 3A and 3B are guided so as to be movable up and down by guide rails (not shown). 4A
.

4B is a main rope for the upper car 2A and lower car 2B, respectively, and the main rope 4A is wound around the driving net sheave 5A, one end of which is connected to the upper car 2A, and the other end connected to the counterweight 3A. has been done. In addition, the main rope 4B is wound around another driving net sheave 5B, one end of which is connected to the upper car 2A via a hanging wheel 10.11 that supports the lower car 2B, and the other end supports the counterweight 3B. It is fixed to the ceiling of the hoistway l via a hanging wheel 12.

By adopting such a rope hooking method, the upper car 2A side has a 1:1 roving (car speed - rope speed), and the lower car 2B side has a roving of 2:1 (car speed = l / 20l/20-bu.

In addition, 8 is a buffer for the lower car 2B provided at the bottom of the hoistway l, 9a and 9b are buffers for the counterweights 3A and 3B, respectively, provided at the bottom of the hoistway l, and F1 to Fn are for the first floor. ~ This is the landing on the nth floor.

Further, in FIG. 1, 13A and 13F3 are winding L electric motors that drive the driving j'iA cars 5A and 5B, respectively.
Inverters 14A and 14B are connected to each of the hoisting motors 13A and 13B, respectively, for supplying electric power thereto. 15A and 15B are speed governors installed in the machine room above the hoistway, 16Δ and 16B are speed governors 115A,
This is a tension car installed on the bottom side of the hoistway 1 corresponding to the hoistway 15B, and an upper car 2 is installed between the speed governor 15A and the tension tun 16A.
A governor rope 17A connected to the lower car 2B is endlessly wound around the governor rope 17A, and a governor rope 17B connected to the lower car 2B is endlessly wound between the speed governor 15B and the tension wheel 16B.

18A and 18B are pulse generators that detect the car position from the rotation of the circumferential gears 15A and 15B, respectively;
The car position signals output from each of the pulse generators 18A and 18B are taken into the elevator operation control device 19.

The operation control device 19 includes a CPU 19A that controls the entire operation.
and ROM1 that stores programs for operation control, etc.
9B, the calculation results from the CPU 19A and the car position signal,
Temporarily record call signals, etc. 1. a RAM 19C, which takes in the car position signal and the call signal, and an inverter 14A,
14B, and an interface 19D that outputs speed and travel command signals.

Next, the operation of this embodiment configured as described above will be explained.

First, when a passenger who has boarded the upper car 2A or the lower car 2B pushes the floor box in the car depending on the destination floor and generates a car call, the control device 19 activates the inverter 14A or 14B.
A travel command is given to the hoisting motor 13A or 13B to start the hoisting motor 13A or 13B, and the upper car 2A or 2B travels to the destination floor.

In this case, the floors that can be serviced by the upper car 2A are from the top floor to the bottom floor 10α, and the floors that can be serviced by the lower car 2B are from the bottom floor to the top floor -α. However, α is determined by the physical dimensions of the cage and is usually 2
It is about the size of a floor.

By the way, when two cars are arranged one above the other in one hoistway l, restrictions are imposed on the service operation of the upper car 2A depending on the operating direction of the lower car 2B. That is, the service zone in which the upper car 2 can be driven is determined by the driving direction of the lower car 2B.

For example, when lower car 2B has a descending operation command,
The upper car 2A can serve up to the lowest floor position owned or assigned to the lower car 2B + 3 floors. However, β is determined by the physical dimensions of the car, and is usually about two floors.

Further, if the lower car 2B has the ascending operation command, the lower car 2A can be serviced in the descending direction up to the highest floor position - β floor held by the lower car 2B. Conversely, for the upward direction of the two upper cars, it is possible to service upward from the current position of the lower car 2B, but if the lower car 2B is in upward operation, the highest floor held by the upper car 2A which is ascending is possible. Service is available up to floor position - β.

Such determination is based on the car position signals of the upper and lower cars;
If this is done by the control device 19 based on the call signal and the driving direction of the car, and an appropriate driving command is given to the inverters 14A and 14B according to the judgment result, the service to passengers will not deteriorate that much (and the transportation This means that a transport volume equivalent to that of two elevators can be secured in one hoistway without reducing power.

Note that the roving method of the cars 2A and 2B in the present invention is not limited to that of the above embodiment.

[Effects of the Invention] As explained above, according to the present invention, a plurality of cars are vertically arranged in one hoistway, and these cars can be raised and lowered using separate rope systems, and each is controlled according to the position and call of each car, making it possible to operate multiple cars within one hoistway, increasing transportation capacity, and reducing the floor space occupied by the hoistway within the building. This has the effect of reducing space.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an elevator showing an embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view of a hoistway of a conventional elevator. l... Hoistway, 2A, 2B... Car, 3A, 3B.
... Counterweight, 4A, 4B... Main rope, 5A, 5B...
Drive net car, 8... Buffer for car, 9A, 9B... Buffer for counterweight, to, 11.12... Hanging wheel, 13A
, 13B... Hoisting motor, 14A, 14B... Inverter, 15A, 15B... Speed governor, 18A, 18B
...Pulse generator, 19...Control device. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Figure 2

Claims (1)

[Claims] A plurality of cars are arranged in one hoistway so that they can be raised and lowered in the vertical direction, and each car is driven by a separate rope drive system, and the operation of each car is controlled according to the position and call of each car. An elevator characterized by being equipped with a control device.