JP4158306B2 - Elevator system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a one-shaft multi-car elevator system in which a plurality of cars independently move up and down in one hoistway.
[0002]
[Prior art]
One-shaft multi-car elevators have been proposed for the purpose of increasing elevator transportation efficiency without increasing hoistway space in high-rise buildings. Furthermore, when the number of users on a specific floor is large depending on the elevator use time zone, an elevator system that connects and operates a plurality of cars in the time zone has been proposed for the purpose of improving transportation efficiency.
[0003]
Japanese Patent Application Laid-Open No. 8-12205 discloses a locking device in which a parent car and a child car are provided on one elevator shaft, and a locking tool that engages with the lower surface of the parent car is engaged with a locking tool on the upper surface of the child car. There is described an elevator that is provided with a slanting wheel having a wheel and that can be connected to a child car and a parent car or can be moved up and down independently.
[0004]
Japanese Patent Application Laid-Open No. 5-201642 provides a coupler that allows two cars to move up and down independently in the same hoistway by the propelling force of a linear motor and to be detachably connected to each other. There is a description of a one-shaft multi-car low-press linear motor elevator in which both are connected by a coupler so that the faulty car can be moved to the nearest floor by normal car propulsion.
[0005]
[Problems to be solved by the invention]
In the conventional one-shaft multi-car type elevator, any one provided with a connecting device for connecting the cars is driven by a linear motor, and there is no disclosure of what is driven by a traction type hoisting machine.
Further, there is no disclosure or suggestion about measures for impact force when the cars are connected to each other or when the hoisting rope is broken, how to reduce the weight of the car, and how to correct the landing error during operation in the connected state.
[0006]
This invention can be driven by a traction type hoisting machine to reduce the impact force at the time of connection and the impact force at the time of breaking the upper car hoisting rope during connection traveling, and the distance between floors of the building is uneven. Even if there is, there is no landing error in the connected cars, and a one-shaft multi-car type elevator in which the lower car is reduced in weight is realized. Furthermore, the present invention is intended to realize a one-shaft multi-car elevator capable of operating the same manner as a conventional double deck elevator by providing a plurality of cars close to each other without providing a connecting device.
[0007]
[Means for Solving the Problems]
In the elevator system according to the present invention, a plurality of cars suspended from a hoisting rope are arranged in a single hoistway, and each car is driven by an independent hoisting machine, and two elevators adjacent to each other vertically on the hoistway. A connecting device for attaching and detaching each car to and from each other is provided.
The connecting device is composed of connecting means capable of opening and closing and a connecting rod that can be expanded and contracted and has a buffer function in the compression direction.
The connecting device is arranged point-symmetrically with respect to the hoisting center of the hoisting rope.
In addition, a car having another car on the upper side of the car is one in which the hoisting rope is supported by the car lower part.
Furthermore, a position detector for detecting the relative position of adjacent cars is provided, and the hoisting machine is controlled by the output of the position detector.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a schematic view of a one-shaft multi-car elevator according to a first embodiment of the present invention, and shows a state in which two upper and lower cars are connected. The upper and lower two cars are driven by separate traction type hoisting machines, and a 1: 1 roping method in which the hoisting rope is directly attached to the car is shown.
In the figure, 1 is an upper car, 2 is a lower car, and 3 is a hoisting rope for lifting the upper car 1, which is attached to the upper support member 5 of the upper car 1 and is driven by a traction hoisting machine (not shown). Reference numeral 4 denotes a hoisting rope for lifting the lower car 2. The hoisting rope 4 is arranged point-symmetrically with respect to the car center to be balanced and is attached to the lower member 6, and is driven by a separate hoisting machine independent of the upper car 1. .
[0009]
Reference numeral 7 denotes a roller guide of the upper car 1 which is guided by a guide rail (not shown). Similarly, 8 is a roller guide for the lower car 2. Reference numeral 9 denotes a connecting device which is arranged point-symmetrically with respect to the suspension center of the hoisting rope 3.
[0010]
Next, the configuration of the connecting device 9 will be described with reference to FIG. 9a is a connecting base provided on the upper car 1, 9b is a pair of holding fittings rotatably attached to the connecting base 9a, and 9c is provided on the lower car 2 via connecting rods 9f and 9e and an attaching metal 9d. The connecting claws 9b and 9c can be electrically connected and released by a solenoid or the like. Consolidation is linked in engagement with the concave portion of the bracket 9b addition is connected nails 9c.
[0011]
The connecting rods 9e and 9f are configured to be telescopic, and the connecting rod 9e can be stored in the pipe-like connecting rod 9f. The connecting rod 9f is filled with oil, and has the same function as a so-called oil-filled shock absorber. A configuration similar to a shock absorber having a built-in compression spring may be used.
[0012]
In the configuration shown in FIG. 3, the gripper 9b and the coupling claw 9c are securely engaged with each other. However, instead of the coupling claw 9c, a rod-shaped coupling may be connected by frictional force with the gripping 9b. . With this configuration, when one of the cars is disconnected due to runaway or an accident, there is an advantage that the car on the normal side is not greatly affected.
[0013]
Another configuration of the coupling device 9 will be described with reference to FIG. 4 which is a detailed view. 9b 'magnet on configured with a permanent magnet or an electromagnet attached to the connecting base 9a, 9c' to 'reverse magnetic poles to the direction on the magnet 9 b' magnet 9 b on attached to the mounting bracket 9d adsorption direction A lower magnet to which a magnetic force acts. Each of the magnets may be an electromagnet or a permanent magnet, and one of them may be a ferromagnetic material that is easily attracted to the magnet. Since the two cages are connected by the magnet's attractive force, the connection is automatically completed when the distance between the upper magnet 9b 'and the lower magnet 9c' is less than a certain distance. If a permanent magnet is used, an inexpensive and simple configuration can be realized without requiring electric power for connection.
[0014]
Reference numeral 10 denotes a position detector using a magnetic linear encoder that detects the relative positions of the upper and lower cars, 10a denotes a magnetic sensor provided in the lower car 2, and 10b denotes a magnetic scale provided in the upper car 1 via an attachment member 10c. The relative position of the upper and lower cars is detected by the magnetic sensor 10a facing the magnetic sensor 10a. Reference numeral 11 denotes a shock absorber that operates when the distance between the cars provided in the lower car 2 becomes a predetermined value or less.
[0015]
Next, the cage structure will be described. The upper car 1 is supported by a lower part 2 via a hoisting rope 3 and an upper support member 5 . Therefore, the upper part of the lower car 2 does not need to support the suspension load, and the upper support member 5 can be omitted and other components can be downsized. Therefore, the upper car can be connected close to the lower car, and the distance between the two cars can be reduced, and there are few restrictions on the floor space of the building.
[0016]
Next, the operation will be described.
When the number of elevator users is small and distributed on each floor, the upper car 1 and the lower car 2 are independently controlled by each hoist as a one-shaft multi-car elevator. When many users are concentrated on a specific floor, the connecting device operates in the same manner as a conventional double deck elevator (hereinafter referred to as “connected operation”).
In this case, the upper car 1 and the lower car 2 are brought into contact with the connecting device in a state where the upper and lower connecting devices are sufficiently decelerated to the extent that they do not interfere with the upper car 1 and the two cars are landed on a predetermined floor. . At this time, the relative position of the two cars is detected by the position detector 10, and the speed of each car is controlled.
[0017]
Then electrically actuated to the connecting state the pawl 9 c of the coupling device connected to connecting operated by two cages of. In this case, each car is driven by its own hoist. When releasing the coupling operation, the electrically release the pawl 9 c is moved upward to the low car 2 stops the upper car 1 to the state coupled state is out. Although the method using electrical means has been described for the connection and release of the connection device, the connection device may be connected and released by mechanical means, such as a connection device for a railway vehicle.
[0018]
If the hoisting rope of the upper car 1 breaks during the connection operation, the connecting device 9 acts as an oil-filled shock absorber, decelerates the falling speed of the upper car 1 and safely stops by the shock absorber 11 . Prevent collisions. At this time, since the connecting device 9 is arranged point-symmetrically at the suspension center of the hoisting rope, the load is not applied to the car, and the car can be stably decelerated without tilting.
[0019]
FIG. 2 applies a 1: 1 roping method in which the hoisting rope is directly attached to the upper car 1 and a so-called 2: 1 roping method in which the hoisting rope is installed to the lower car 2 via the lower suspension wheels 13a and 13b. Shows the configuration. The elevator system configured as described above can be connected as in the case described with reference to FIG. Of course, it goes without saying that 2: 1 roping may be applied to the upper car 1. Although a magnetic linear encoder is used as the position detector 10 , an optical linear encoder, a combination of a cam and a proximity switch, or the like may of course be used. Furthermore, although the connection operation by two cars was demonstrated, you may carry out a connection operation using three or more cars.
[0020]
【The invention's effect】
As described above, according to the present invention, a plurality of cars suspended from a hoisting rope are arranged in a single hoistway, and each car is driven by an independent hoisting machine, and is moved up and down on the hoistway. Since the connecting device for attaching and detaching two adjacent cars to each other is provided, an elevator system having high transportation efficiency can be realized without increasing the hoistway space. In other words, when the number of users is small, it is possible to operate multiple cars independently, and when the number of users on a specific floor is large, multiple cars can be connected and the same as a conventional double deck elevator Is possible.
[0021]
In addition, since the connecting device is composed of connecting means that can open and close and a connecting rod that can be expanded and contracted and has a cushioning function in the compression direction, the upper car even if the hoisting rope of the upper car breaks during connection operation. The vehicle's falling speed can be decelerated and safely stopped to prevent collision between cars, and passenger safety can be ensured.
[0022]
Further, since the coupling device is arranged point-symmetrically with respect to the hoisting center of the hoisting rope, the load is not applied to the car, and the car can be stably decelerated without tilting.
[0023]
Further, among the cars having other cars on the upper side, the hoisting rope is supported by the lower part of the car, so the distance between the two cars can be reduced, and there are few restrictions on the floor space of the building.
[0024]
Furthermore, a position detector that detects the relative position of adjacent cars is provided, and the hoisting machine is controlled by the output of the position detector, so that even if the distance between the floors of the building is uneven, it can be attached to the connected car. An elevator system that can be adapted to various floor spaces of a building without causing floor errors can be realized.
[Brief description of the drawings]
FIG. 1 is a schematic view of a one-shaft multi-car elevator according to a first embodiment of the present invention.
FIG. 2 is a schematic diagram showing a modification of what is shown in FIG.
FIG. 3 is a detailed view of the coupling device of FIG. 1;
FIG. 4 is a detailed view showing a modification of the coupling device shown in FIG. 3;
[Explanation of symbols]
1 ... Upper cage, 2 ... Cage, 9 ... Connecting device, 10 ... Position detector

Claims (4)

A plurality of cars suspended from a hoisting rope are arranged in a single hoistway, and each car is driven by an independent hoisting machine. A connecting device to be attached and detached ;
A shock absorber that operates when the distance between the respective cages becomes a predetermined value or less,
The elevator system according to claim 1, wherein the coupling device has a buffer function in a compression direction . 2. The elevator system according to claim 1, wherein two elevator cars adjacent in the vertical direction are connected to each other by the connecting device in accordance with a use situation of a passenger . A position detector for detecting the relative position of the two cars adjacent above and below,
The elevator system according to claim 2, wherein the landing position of each car is adjusted by controlling the hoisting machine based on the output of the position detector . The elevator system according to any one of claims 1 to 3, wherein the connecting device is attracted by a magnetic force between an upper magnet and a lower magnet and can be opened .

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