JPS6150875B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an elevator car position detection device.

BACKGROUND ART Conventionally, as a simple device for detecting the position of an elevator car, a system has been used in which a position switch is provided for each floor in a hoistway and these switches are sequentially operated by a cam attached to the car. This is because while the cam can reliably detect the position of the car as long as the position switch is operating, the length of the cam determines the operating range of the switch. Generally, an elevator control circuit is configured to compare a registered call with the position of the car and issue a stop command when the car reaches the position where the call is located. Therefore, the predetermined deceleration distance (distance from when a stop command is issued until the car stops; this value changes depending on the elevator drive method and speed) while the car is running.
The car position signal must be transferred to the next floor before this point. However, as the speed of the car increases, the floor spacing and the operating range of the position switch no longer satisfy these conditions, so this position switch is used exclusively in low-speed elevators.

In addition, there is also a system that detects the position of the car by providing a detection device in the car and attaching an element for operating the device at a desired position in the hoistway to obtain electrical pulse signals and counting the signals. This allows the user to freely decide when the position signal changes to the next floor during travel and does not have the disadvantages of the above-mentioned position switch, so it is widely used in both low-speed and high-speed elevators. However, this device has a problem in that if a discrepancy occurs in the pulse count, the car position and the car position signal no longer match.

This invention solves the above-mentioned drawbacks, and provides an elevator in which a car position signal can be transferred to the next floor at a desired position between floors, and even if the position signal is incorrect, it can be corrected reliably. The purpose of the present invention is to provide a position detection device.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In FIG. 1, 1A to 4A are first detection devices each consisting of position switches arranged in a straight line in the hoistway and installed at the positions of the 1st to 4th floors; 2B to 4;
Climbing cams B are arranged in the hoistway and alternately arranged in different rows at positions a predetermined distance from the 2nd to 4th floors, and 1C to 3C are also arranged at predetermined distances from the 1st to 3rd floors. With the downward cams arranged, cams 2B, 1C, 4B, 3C and cams 3B,
2C are arranged in a straight line and in different columns. 6 is a car, and 7 is a cam that is provided on the car 6 and operates the first detection devices 1A to 4A when it engages with them. It has a length that allows you to press any one of them. 8 is a second detection device provided on the car 6 and consisting of a switch that operates when engaged with the cams 2B, 1C, 4B, and 3C; 9;
Similarly, the third detection device is composed of a switch that operates when engaged with the cams 3B and 2C.

In Fig. 2, 1AX to 4AX are the first detection device 1A
~4A operating range, 2BX, 1CX, 4BX, 3CX
is the operating range of the second detecting device 8, 3BX, 2CX is the operating range of the third detecting device 9, 1DX to 4DX is the operating range of the positioning relays 1D to 4D in Fig. 3, A
is a distance indicating the operating position of the second detection device 8, and is set slightly longer than the required deceleration distance of the car 6. Similarly, B is a distance indicating the operating position of the third detection device 9.

In Figure 3, (+) and (-) are DC power supplies, 1Aa to 4
Aa are the normally open contacts of the first detection devices 1A to 4A, 1D to 4D are the position determination relays for the first to fourth floors, 1Da to 4Da are the normally open contacts of the respective first detection devices, 1Db to
3Db is also a normally closed contact, and contacts 1Aa to 4Aa and contacts 1Db to 3Db connect the first detection devices 1A to 4.
A selection circuit is configured to select one of the outputs when A is superimposed. 1E to 4E are the position detection relays for the 1st to 4th floors, 1Ea to 4Ea are their normally open contacts, 1Eb to 4Eb are their normally closed contacts, and 8
a is a normally closed contact of the second detection device 8, 9a is a normally closed contact of the third detection device 9, 10 is a second detection relay, 10a to 10d are its normally closed contacts, and 11 is a third
11a to 11c are normally closed contacts, 12a and 12b are running relay contacts that close when the car 6 runs in the upward direction, and 13a and 13b are detection relays.
14 is a traveling relay, 14a is a normally closed contact thereof, and 14b is a normally open contact.

Next, the operation of this embodiment will be explained.

Assuming that the car 6 is now on the second floor, the first detection device 2A is pushed by the cam 7 as shown in FIG.
Contact 2Aa is closed, (+)-2Aa-1Db-2D-
The position determining relay 2D on the second floor is closed by the (-) circuit, the contact 2Da is closed, and the contact 2Db is open. Since both the second and third detection devices 8, 9 are not operating, the contacts 8a, 9a are closed, the second and third detection relays 10, 11 are energized, and the contacts 10a to 11 are energized. 10d, 11a-11c
are all open. Here, (+)-14a-
The second floor position detection relay 2E is energized by the circuit 2Da-2E-1Eb-3Eb-(-), the contact 2Ea is closed, and the contact 2Eb is opened. with this,
The location of the second floor has been detected.

When car 6 starts to rise, up-travel relay 1
2a and 12b are closed, the travel relay 14 is energized, the contact 14a is opened, and the contact 14b is closed. Now, (+)-14b-2Ea-2E-1Eb
The position detection relay 2E on the second floor is self-maintained by the circuit -3Eb-(-). When the car 6 further rises and the third detection device 9 is pushed by the cam 3B,
Contact 9a is opened, third detection relay 11 is deenergized, and contacts 11a to 11c are closed. with this,
(+)-14b-2Ea-11a-3E-11b-
A circuit 12a-(-) is formed, and the position detection relay 3E on the third floor is energized and self-maintained by closing the contact 3Ea. Further, since the contact 3Eb is opened, the position detection relay 2E on the second floor is deenergized, the contact 2Ea is opened, and the contact 2Eb is closed. with this,
If the position of the third floor is detected and there is a call to the third floor, the car 6 can be stopped at the third floor. At this time,
The second detection device 8 is not operating, and the second detection relay 10 is energized, e.g. contact 10b
is open, so position detection relay 4E on the 4th floor
will not malfunction. Car 6 rises further,
When the third detection device 9 comes off the cam 3B, the contact 9
a is closed, the third detection relay 11 is energized,
Contact 11b is open, but position detection relay 3E on the third floor is (+)-14b-3Ea-3E-2Eb-4
Since it is held by the Eb-(-) circuit, no change occurs in the circuit.

When the car 6 further rises and the cam 7 is pressed by the first detection switch 3A on the third floor, the contact point 3Aa is closed. Then the cam 7 switches to the first detection switch 2 on the second floor.
When disconnected from A, contact 2Aa opens, second floor positioning relay 2D is deenergized, contact 2Da opens, and contact 2Db closes. Now (+)-3Aa
The position determination relay 3D on the third floor is energized by the circuit -2Db-3D-(-), the contact 3Da is closed, and the contact 3Db is opened. When the car 6 further rises and the third detection device 9 is pushed by the cam 2C,
Contact 9a is opened and third detection relay 11 is deenergized. Next, when the third detection device 9 comes off the cam 2C, the third detection relay 9 is energized.
However, no change occurs on the circuit during this time. When the car 6 rises from the third floor and the second detection device 8 is pushed by the cam 4B, the contact 8a opens and the second detection relay 10 is deenergized, and in the same manner as described above, the car moves to the fourth floor. The position detection relay 4E on the third floor is energized, and the position detection relay 3E on the third floor is deenergized. Thereafter, this operation is repeated and the car position advances upward.

Suppose that when the user comes to the vicinity of the 4th floor, for some reason the position detection relay 4E on the 4th floor is not energized, but the position detection relay 3E on the 3rd floor is energized.
When car 6 stops on the 4th floor, traveling relay 12 is placed above it.
b is opened, the travel relay 14 is deenergized, and the contact 14
a is closed, and contact 14b is opened. Contact 14b
By opening, the position detection relay 3E on the third floor is deenergized and the contact 3Eb is closed. Now, (+)-1
The fourth floor position detection relay 4E is energized by the circuit 4a-4Da-4E-1Eb-3Eb-(-), and the correct car position is detected.

A similar explanation can be given when the car 6 descends.

In this way, the switching position of the car position signal to the next floor can be freely determined. In addition, the first detection devices 1A to 4A are configured to detect where the car 6 stops.
One of them is always in operation, so even if the car position signal is erroneous, it can be corrected to the correct position when the car 6 stops. Furthermore, even if a power outage occurs, an accurate position can be detected once the power is restored.

In addition, in the example, the counter is configured with a relay,
The explanation has been given of a method in which position change signals are generated alternately and sequentially between odd-numbered floors and even-numbered floors, and these signals are counted. Any other device may be used as long as it detects the position of the car 6.

In addition, when the operating range of the first detection devices 1A to 4A is short and adjacent floors do not overlap each other, 1
A plurality of detection devices may be arranged per floor at appropriate intervals, and their output contacts may be connected in parallel. If the operating range is too long, the contacts may be connected in series.

As explained above, in this invention, a first detection device corresponding to each floor and whose operating range overlaps with each other between adjacent floors is installed, and when the second or third detection device, which operates alternately on each floor, receives a signal, The car position is advanced to the next floor, and when the car stops, the car position is determined to be the floor indicated by the first detection device, regardless of the car position due to the step.

Thereby, the car position signal can be advanced to the next floor at a desired position between floors, and even if the car position signal is out of order, it can be reliably corrected.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the relationship between a detection device and a cam showing one embodiment of an elevator position detection device according to the present invention, Fig. 2 is an explanatory diagram of the operating range of the detection device of Fig. 1, and Fig. 3 is a circuit diagram. be. 1A to 4A...first detection device on the 1st floor to the 4th floor,
2B~4B...cam for climbing from the 2nd floor to the 4th floor, 1C~
3C...1st floor to 3rd floor descending cam, 1D to 4D...
1st to 4th floor position determination relays, 1E to 4E... Same as left position detection relay, 6... Car, 7... Cam, 8
...Second detection device, 9...Third detection device, 1
0...Second detection relay, 11...Third detection relay, 12a, 12b...Upward traveling relay, 13
a, 13b... Downward running relay, 14... Running relay.

Claims (1)

[Claims] 1. A first detection device that is arranged in the hoistway corresponding to each floor and operates when a car is detected; a second detection device that is installed in the car and operates when the car reaches a predetermined distance in front of each floor; and a second detection device that operates alternately for each floor. 2 and 3rd detection devices, when the second or third detection device operates while the car is running, it advances the position of the car to the next floor, and when the car stops, the car is moved by the step; No. 1 above regardless of location.
a circuit for emitting a car position signal corresponding to the floor indicated by the detection device, the operating range of the first detection device is overlapped between adjacent floors, and the output of the first detection device overlapped with each other; An elevator position detection device comprising a selection circuit for selecting one.