JPS6133794B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an elevator car position detection device controlled by calculations of an electronic computer.

Detection of the car position is essential for elevator operation, and this is performed by a floor selection machine. There are various types of floor selection machines, but recently, one that utilizes the calculations of an electronic computer has been considered.
In this method, an inter-floor switch is installed on each floor, and each time the car passes through this inter-floor switch, the first floor is added or subtracted to determine the current position of the car.

However, if there is an error in the input of the output of the inter-floor switch, there will be a discrepancy between the calculated car position and the actual car position, making subsequent operation impossible. In particular, in the event of a power outage, the calculated and stored car position may be a random value, and therefore, even if the power outage is restored, normal operation cannot be resumed.

SUMMARY OF THE INVENTION The present invention aims to improve the above-mentioned drawbacks, and aims to provide an elevator position detection device that is capable of calculating the correct car position even if a power outage or the like occurs.

An embodiment of the present invention will be described below with reference to FIG.

In the diagram, 1 to 5 are floors 1 to 5, 1A to 5A.
are the cams arranged in the hoistway and installed on the 1st to 5th floors, 6 is the lowest floor detector consisting of a switch also installed on the lowest floor (1st floor), and 7 is the same as the highest floor (5th floor). The top floor detector installed on the 8th floor)
~11 are the cams installed between the 1st floor 1 and the 2nd floor 2, the 2nd floor 2 and the 3rd floor 3, the 3rd floor 3 and the 4th floor 4, and the 4th floor 4 and the 5th floor 5, 12 is the cage, and 13 is the Cams 14 are installed on the car 12 and engage the bottom floor detector 6 when the car 12 is on the bottom floor 1, and the top floor detector 7 when the car 12 is on the top floor 5. ~5 A floor detector consisting of a switch that engages with the cams 1A to 5A when the car is on the floor 5, and a floor detector 15 that similarly engages with the cams 8 to 11 when the car 12 passes between floors. 16 is the main rope for hanging the basket;
17 is an electronic computer, 18 is a central processing unit, 19 is a read-only memory (hereinafter referred to as ROM) in which the lowest and highest floor positions are stored, and 20 is a car 1.
2, a readable/writable memory (hereinafter referred to as RAM) that stores the current position of 2 in a memory address; 31, a converter that converts input into information for the electronic computer 17;
22 is an operation status signal that is "H" when the car 12 is in automatic power operation and "L" when it is in manual operation, 23 is a bus bar for address bus, data bus, etc., 24 is a normal power supply, 25 is an emergency power supply, and 26 is an emergency power supply. This is a memory element that stores the current position of the car 12.

Next, the operation of this embodiment will be explained.

Every time the car 12 passes between floors, the interfloor detector 1
5 engages with cams 8 to 11, and its output is transmitted to converter 2
1, the current position of the car 12 is calculated by the central processing unit 18, and written to the RAM 20. That is, if the vehicle is traveling uphill, one floor is added to the previously stored value in the RAM 20 and stored, and if the vehicle is traveling down, the value is subtracted by one floor and stored. This becomes a car position signal and the operation of the elevator is controlled, but since this is well known, detailed explanation will be omitted.

When the car 12 stops at the lowest floor 1, the cam 13 engages with the lowest floor detector 6.
emits output. When this output is taken into the central processing unit 18, the lowest floor position is read from the ROM 19 and written to the RAM 20 as the current position. Also, when the car 12 stops at the top floor 5,
Engaged with the cam 13, the top floor detector 7 issues an output, and the top floor position is read from the ROM 19 in the same manner as described above and written to the RAM 20 as the current position. Therefore, when the car 12 stops at the terminal floor, even if the current position of the car 12 in the RAM 20 is incorrect, it will be rewritten correctly, and the calculated car position will not match the actual car position. will match.

On the other hand, the memory element 26 is driven by the emergency power supply 25, and stores the same car position as that stored in the RAM 20.

Now, when the normal power source 24 is restored after a power outage, the state of the external signal is detected for a certain period of time (about 1 second). For example, the floor detector 14 has cams 1A to 5A.
If the car 12 is not engaged and the operating state signal 22 is "H" (if the car 12 is running when the power outage occurs), the central processing unit 18 performs a corrective action. That is, the car 12 is forcibly moved to the terminal floor by a circuit not shown. When the car 12 stops at, for example, the lowest floor 1, the cam 13 engages with the lowest floor detector 6, so the lowest floor position is read from the ROM 19 as described above.
At the same time that RAM 20 is rewritten, memory element 2
The value of 6 is also modified. Further, when the power is restored, if the floor detector 4 is engaged with the cam 2A, and the operating state signal 22 is "H" (if the car 12 is stopped when the power is out), the memory element The value stored in 26 is used as the car position signal. Even if the value stored in the RAM 20 changes due to a power outage, the value in the storage element 26 retains the value before the power outage, so a value that matches the actual car position can be obtained. In this case, forced travel of the car 12 is not performed. Furthermore, if the operating status signal 22 is "L" (if the car 12 is in manual operation when a power outage occurs),
Modification of RAM 20 and storage element 26 and car 1
2. Forced running will not be carried out. This is because the speed in manual operation is low, and even if a power outage occurs while the car is running, the deviation between the calculated car position and the actual car position is extremely small.

FIG. 2 shows another embodiment of the present invention, in which 2
7 is a running signal that becomes "H" when the car 12 is running (regardless of whether it is automatic or manual) and becomes "L" when it is stopped.

When the normal power source 24 is normal, the state of the running signal 27 is stored in the storage element 26. When the normal power supply 24 recovers from a power outage, the contents of the memory element 26 are read out, and if the running signal 27 before the power outage is "L", the calculated car position has not shifted and is stored in the memory element 26. Use the cage position. Further, if the running signal 27 is "H", there is a possibility that the calculated car position has shifted due to a power outage occurring during the running. In this case, when the power is restored, the car 12 is forced to run to the terminal floor, and the terminal floor ROM 19
The terminal floor position stored in is written into the storage element 26.

As explained above, in this invention, when the current position of the car is calculated by an electronic computer, the current position of the car is stored in the memory element using the emergency power supply, so that the calculated car position does not change due to a power outage. However, you can always get a value that matches the actual car position.

In addition, if the car was stopped before the power outage, the above memorized value will be set as the current position of the car after the power is restored, and if the car is running, the car will be forcibly moved to the terminal floor and read-only there. The floor data of the terminal floor previously stored in the memory is stored in the memory element and used as the calculated car position, so it is easy to correct the calculated value of the car position that has changed due to a power outage. can do.

[Brief explanation of the drawing]

FIG. 1 is a structural explanatory diagram showing one embodiment of an elevator position detection device according to the present invention, and FIG. 2 is a structural explanatory diagram showing another embodiment of the present invention. 1 to 5...1st to 5th floors, 1A to 5A...
Cams on the 1st to 5th floors, 6... Bottom floor detector, 7...
Top floor detector, 8-11...cam, 12...basket, 13...cam, 14...floor detection device, 15
...Inter-floor detector, 17...Electronic computer, 18...
Central processing unit, 19...Read-only memory, 20
. . . Writable and readable memory, 24 . . . Normal power supply, 25 . . . Emergency power supply, 26 .

Claims (1)

[Claims] 1. For devices that calculate the current position of a car using a computer driven by a normal power source, an emergency power source that supplies power in the event of an emergency such as a power outage of the normal power source;
a memory element that is driven by the emergency power supply and stores the current position of the car; a state detection means that detects whether the car was stopped or running before the power outage when the normal power supply is restored after a power outage;
A read-only memory in which floor data of the terminal floor is stored in advance, and when the power failure is restored, if the state detection means detects the stoppage of the car, the value of the storage element is set as the current position of the car, and the state is detected. The present invention is characterized by comprising means for forcing the car to travel to the terminal floor if the means detects the running of the car, and then storing floor data in the read-only memory in the storage element. Elevator position detection device.