JPH07106850B2 - Elevator equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator driven by a linear motor, and more particularly to a so-called one-shaft multi-car elevator having a plurality of cars arranged in one hoistway.

[0002]

2. Description of the Related Art In recent years, the number of skyscrapers has increased, and recently construction of ultra-high-rise buildings having a height of more than 1000 m is planned. In this way, as the building rises in height, it becomes difficult to apply it to conventional rope-type elevators, and extremely large transport capacity is required.
In the conventional method of operating one car in one hoistway, too many hoistways are required, which reduces the effective floor area of the building.

For this reason, for example, as disclosed in Japanese Patent Application Laid-Open No. 2-261789, "Elevator Device", a one-shaft multi-car system in which a plurality of sets of cars are arranged in one hoistway is used, and each car is a linear motor. There has been proposed a drive system which is driven by the method described below, which will be briefly described with reference to FIG.

In FIG. 2, 1 is a hoistway, 10A and 1
0B is a basket of the same structure, 2 and 3 are rails, 4
Guide rollers provided on both the left and right sides of the car and on the upper and lower parts of the car to guide the car along the rails.
Braking shoes are provided on the lower left and right sides of the car so as to face the rails, 30 is a primary side coil of the linear motor provided in the hoistway 1, and 20 is a side surface of the car so as to face the primary coil 30. It is a secondary conductor such as a permanent magnet that constitutes the secondary side of the installed linear motor. The primary coil 30 of the linear motor is divided into sections 31 to 38 in the middle of the floors, and the inverter device 40 independently supplies power to each of the sections 31 to 38.

Reference numeral 41 is a variable voltage variable frequency control device (hereinafter referred to as VVVF device) composed of power transistors and the like, 42 is a contactor contact for connecting the primary coil 30 and the VVVF device 41, and 43 is also an abnormal time. It is a contact for short-circuiting the primary coil so that the dynamic brake acts on the car. With the above configuration,
The positions of the cars 10A and 10B are respectively detected, the corresponding sections 31 to 38 are selected, and the inverter device 40 is selected.
By urging with, it is possible to control a plurality of cars independently.

[0006]

By the way, in the above structure, when the secondary conductor, that is, the cage moves and the magnetic flux of the secondary conductor crosses the primary coil one after another, velocity electromotive force is induced in the primary coil. Since this speed electromotive force is added as a disturbance to the current control system of the inverter device, the output current of the inverter device has a deviation from the target value. That is, the output current I _L of the inverter device is the command value I _L
^{For *} , the following formula 1 is obtained (see The Institute of Electrical Engineers of Japan, D, 108, No. 8, pp. 757-764).

[0007]

[Equation 1]

The second term in the above equation is a current disturbance due to the speed electromotive force of the secondary conductor, and as is clear from the above equation, this disturbance increases as the car speed increases, but especially when the car is between the sections of the primary coil. When passing through the (divided portion), the disturbance fluctuates greatly, resulting in thrust variation.
The car will generate vertical vibration. Therefore, in order to suppress the car vibration due to this thrust fluctuation, it is necessary to pass through the primary coil divisions at a car speed as low as possible, but as shown in FIG. If the sections are divided into sections, the higher the floor space, the higher the speed at which the car passes through the divided sections of the primary coil.

Particularly in a skyscraper or an ultra-high-rise building exceeding 1,000 m, it is considered that a sky lobby is provided every 100 m in height and the elevator is operated with the sky lobby as a stop floor. In such a case, if the primary coil is split between floors, the speed of the car will be considerably high at the time of passing through the split portion, and therefore the fluctuation of the disturbance at the time of passing through the split portion will be large and the car will vibrate. There is a problem of causing.

Similarly, considering a case where an abnormality occurs in a certain section of the primary coil, when the primary coil is divided between floors as shown in FIG. 2, the car is in an abnormal state at high speed. It is extremely dangerous to rush into the coil section.

On the other hand, in the one-shaft multi-car system, in order to improve the transportation efficiency, it is necessary to reduce the distance between the front cages as much as possible, but as described above, the primary coil is divided into a plurality of sections and each section is divided into a plurality of sections. In the system in which the inverter device supplies power to each independently, only one car can run in one primary coil section. Moreover, for safety reasons, it is necessary to ensure that the rear car does not plunge into the same section while traveling through the primary coil section with the front car.

Therefore, for example, when the front car is stopped at a floor and the rear car is stopped at the next lower floor, the front car departs and the primary coil is divided. It is necessary to confirm that the car at the rear has started after passing through the section to the next primary coil section, but if the primary coil is divided between floors as shown in Fig. There is a problem that it takes time from the departure of the car until the car passes through the split portion of the primary coil, and the departure of the car behind is delayed by that much, resulting in a decrease in transportation efficiency.

The present invention has been made in view of the above-mentioned various problems, and an object of the present invention is to prevent a car from passing through a divided portion of a primary coil without taking any special control measures. An object of the present invention is to provide an elevator apparatus that can improve transportation efficiency by minimizing the car interval without causing vibration in the vehicle.

[0014]

SUMMARY OF THE INVENTION The present invention is an elevator apparatus for a one-shaft multi-car system in which a primary coil is mounted on the hoistway wall and a car is driven by a linear motor having a secondary conductor on the side surface of the car. A hoistway for ascending and a hoistway for descending only for the descending direction are provided, and in the hoistway for ascending, the primary coil is divided at a position slightly above the floor position of each stop floor to separate each section. Configure and
In the descending hoistway, the primary coil is divided at a position slightly below the floor position of each stop floor to form each section.

[0015]

In the ascending / descending hoistway, regardless of the distance between the stop floors, as soon as the car departs, the car passes through the primary coil divisions at a low speed, and even after traveling at a high speed, it reaches the next stop floor. There is no division. Further, since the car in front passes through the split part of the primary coil and moves to the next primary coil section as soon as it departs, the car in rear waiting on the lower floor can also immediately depart. The same applies to the descent hoistway.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the overall configuration of the present invention, but illustration of the upper and lower parts of the hoistway is omitted. In FIG. 1, US is an ascending / descending hoistway, DS is a descending hoistway, 30 is a primary coil laid on the entire stroke of the hoistway wall, and 30A to 3
0F is a section of the primary coil that is divided slightly above the floor position of the stop floor in the ascending hoistway and slightly below the floor position of the stop floor in the descending hoistway. , 40A to 40F independently supply power to each section 30A to 30F of the primary coil.
It is a VVF device. A secondary conductor (not shown) is arranged on the side surface of each car as in FIG.

With the above structure, the hoistway U for ascending now
S is a basket 11 from the 3rd floor of the sky lobby and a basket 12 again
The case where the vehicle starts traveling from the second floor of the sky lobby will be described. First, when the car 11 confirms that there is no other car in the front feeding section, that is, the section of the primary coil section 30A, the VVVF device 40B feeds power to the primary coil 30B, and the car 11 starts traveling. At the same time, power is also supplied to the primary coil section 30A.

When the car 11 eventually advances from the primary coil section 30B to the primary coil section 30A through the split portion, the power supply to the primary coil section 30B is stopped. At this time, the fluctuation of the disturbance due to the speed electromotive force occurs at the time of passing through the dividing portion, but the speed of the car is still low immediately after the start and the disturbance itself is small, so the vibration of the car hardly occurs.

Thereafter, the speed of the car 11 increases and the disturbance due to the speed electromotive force increases, but until the car 11 stops on the 4th floor of the sky lobby, there is no division of the primary coil. Therefore, the fluctuation of the disturbance does not occur. Therefore, we arrive at the 4th floor with almost no vibration of the car.

On the other hand, the car 12 also starts traveling after confirming that no other car exists in the front primary coil section, but the car 11 in the front moves from the primary coil section 30B to 30A immediately after the start of traveling. Since there is no car in the primary coil section 30B, the car 12 can run immediately after the car 11 starts running.

In the above structure, it is necessary to detect the position of each car in order to confirm whether or not each car has passed through the divided portion of the primary coil. However, regarding the detection of the car position, For example, by mounting a light emitter on the car side and a light receiver on the required location inside the tower,
Alternatively, instead of a light emitter / receiver, a proximity switch using a magnet or the like may be used.In addition, in order to continuously detect the car position, a large number of reflectors are continuously installed at equal intervals in the tower,
Various methods are known, such as calculating the car position by projecting light from the car side and counting the reflected light as a pulse, and therefore description thereof is omitted here.

The secondary conductor disposed on the car side is not limited to the permanent magnet described above, and it goes without saying that it may be a superconducting coil or a normal conducting coil. Further, in the above description of the operation, only the case of the ascending / descending hoistway is described, but the same applies to the case of the descending hoistway.

[0023]

According to the present invention, the hoistway is divided into the hoistway and the hoistway, and the primary coil is divided into a position slightly above the floor position of the stop floor in the hoistway for the hoistway so that the hoistway for the hoisting is lowered. In the road, the car is set to be slightly lower than the floor position of the stop floor, so the car always passes through the split part of the primary coil at low speed, and the car vibration caused by the fluctuation of the disturbance is suppressed as much as possible. be able to.

Further, since the car in front passes through the split part of the primary coil and shifts to the next primary coil section as soon as it departs, the car waiting in the rear can also immediately depart, and the car interval can be minimized. It is possible to improve the transportation efficiency. Furthermore, even if the front primary coil section is in an abnormal state, when the car rushes into the primary coil section, there is almost no risk of causing a serious accident because it is in a low speed state immediately after the start,
The safety effect is also very large.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of an overall configuration according to the present invention.

FIG. 2 is a diagram showing an overall configuration of a conventional example.

[Explanation of symbols]

 US climbing hoistway DS descending hoistway 11 to 14 car 30 primary coil 30A to 30F each section of primary coil 40A to 40F VVVF device

Claims (1)

[Claims] 1. A plurality of cars are arranged in one hoistway, a primary coil of a linear motor is laid on a side wall of the hoistway, and a secondary conductor of the linear motor is arranged on a side surface of each car to form a linear motor. In a one-shaft multi-car elevator device that drives each car by a motor, an ascending / descending hoistway dedicated to the ascending direction and a descending hoistway only for the descending direction are provided, and in the ascending / descending hoistway, the primary coil Divide each stop floor at a position slightly above the floor position to form each section.In the descending hoistway, divide the primary coil at a position slightly below the floor position of each stop floor. And an electric power supply VVVF device is provided for each section of the primary coil.