JPS6128589B2 - - Google Patents

Description

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

Conventionally, as a simple device for detecting the position of an elevator car, 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 required deceleration distance during travel (the distance from when a stop command is issued until the car stops; this value changes depending on the elevator drive method and speed).
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 while the elevator is running, and does not have the disadvantages of the position switch described above, 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 4.

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; 1B to 4;
B is also arranged in a straight line in the hoistway and is located on the 1st floor ~
The cams 2C to 4C installed at the 4th floor position are each arranged in the hoistway, and the ascending cams are alternately arranged in different rows at a predetermined distance before the 2nd to 4th floors, and 1D to 3D are the same. Cam 2 is a descending cam placed a predetermined distance before the 1st to 3rd floors.
C, 1D, 4C, 3D and cams 3C, 2D are arranged in a straight line and in different rows. 6 is the car, and 7 is the first one provided in the car 6.
A cam 8 is provided in the car 6 and operates the detection devices 1A to 4A when it engages with the detection devices 1A to 4A.
A second detection device consisting of a switch that operates when engaged with B, 9 is also a cam 2C, 1D, 4C, 3
A third detection device 10 is a switch that operates when engaged with the cams 3C and 2D.

In FIG. 2, A is the operating range of the first detecting devices 1A to 4A, and B is the operating range of the second detecting device 8, where operating range B<operating range A. C is a distance indicating the operating position of the third detection device 9;
The deceleration distance is set slightly longer than the required deceleration distance.
Similarly, D is a distance indicating the operating position of the fourth detection device 10.

In Fig. 3, 1u to 4Eu are the operating ranges of position detection relays 1E to 4E in Fig. 4 when they are raised, and 1ED to 4.
Similarly, ED is the operating range when descending.

In Figure 4, (+) and (-) are DC power supplies, 1Aa to 4
Aa is the normally open contact of the first detection device, 1E respectively
~4E are position detection relays for the 1st to 4th floors, respectively, 1Ea ~ 4Ea are normally open contacts, 1Eb ~
4Eb is a normally closed contact, 8a is a normally open contact of the second detection device 8, 9a is a normally closed contact of the third detection device 9, 10a is a normally closed contact of the fourth detection device 10, 1
1 is a second detection relay, 11a is its normally open contact, 11b is also a normally closed contact, 12 is a third detection relay, 13a to 13c are its normally closed contacts, 14
13a is an up-travel relay contact that closes when the car 6 travels in the upward direction, and 13a is a down-travel relay 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. Further, the second detection device 8 is pushed by the cam 2B, the contact 8a is closed, the second detection relay 11 is energized, the contact 11a is closed, and the contact 11b is open. 3rd and 4th
Since both of the detection devices 9 and 10 are not operating, the contacts 9a and 10a are closed, the third and fourth detection relays 12 and 13 are energized, and the contact 1
2a to 12d and 13a to 13c are all open. Here, (+)-11a-2Aa-2E-1
The Eb-3Eb-(-) circuit energizes the position detection relay 2E on the second floor, and the contact 2Ea closes.
Contact 2Eb is opened. The position of the second floor has now been detected.

When the car 6 starts to rise, the up-travel relay contact 14a closes. And the second detection device 8
When the contact 8a is removed from the cam 2B, the contact 8a is opened, the second detection relay 11 is deenergized, the contact 11a is opened, and the contact 11b is closed. Now, (+)-
The position detection relay 2E on the second floor is self-maintained by the circuit 11b-2Ea-2E-1Eb-3Eb-(-). The car 6 further rises and the fourth detection device 1
1 is pushed by the cam 3C, the contact 10a is opened, the fourth detection relay 13 is deenergized, and the contacts 13a to
13C is closed. Therefore, (+-11b-2Ea
A circuit of -13a-3E-13b-14a-(-) 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, the position of the third floor is detected, and if 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 9
is not operating, the second detection relay 12 is energized, and, for example, the contact 12b is open, so the position detection relay 4E on the fourth floor will not malfunction. The car 6 further rises and the fourth detection device 1
0 comes off the cam 3C, the contact 10a closes,
The fourth detection relay 13 is energized and the contact 13b is opened, but the position detection relay 3E on the third floor is
(+)-11b-3Ea-13a-3E-2Eb-4
Since it is held by the Eb-(-) circuit,
No changes occur in the circuit. Furthermore, when the car 6 rises and the cam 7 comes off the first detection device 2A, the contact point 2Aa opens. Next, when the cam 7 pushes the first detection device 3A, the contact 3Aa is closed. Furthermore, when the car 6 rises and the fourth detection device 10 is pushed by the cam 2D, the contact 10a opens and the fourth detection relay 13 is deenergized. Next, when the fourth detection device 10 comes off the cam 2D, the fourth detection relay 13 is energized. However, no change occurs on the circuit during this time. Car 6 approaches the third floor,
When the second detection device 8 is pushed by the cam 3B, the contact 8a is closed, the second detection relay 11 is energized, the contact 11a is closed, and the contact 11b is opened. Now, the position detection relay 3E on the third floor is
(+)-11a-3Aa-3E-2Eb-4Eb-
It is held by the (-) circuit.

The car 6 rises from the third floor and the second detection device 8
is removed from the cam 3B, and the third detection device 9 is removed from the cam 4B.
When pressed by C, the contact 9a opens, the third detection relay 12 is deenergized, and in the same manner as described above, the fourth detection relay
The position detection relay 4E on the 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 fourth floor, the position detection contact 4E on the fourth floor is not energized for some reason, and the position detection relay 3E on the third floor is energized. However, the second detection switch 8 is pushed by the cam 4B, the second detection device 11 is energized, and the contact 11b
When the relay 3E is opened, the position detection relay 3E on the third floor is deenergized and the contact 3Eb is closed. Now (+)-1
A circuit 1a-4Aa-4E-1Eb-3Eb-(-) is formed, and the fourth floor position detection relay 4E is energized, so the fourth floor position is detected. That is,
Although the second detection device 8 cannot detect the absolute position of the car 6, the first detection device 4A cannot detect the absolute position of the car 6.
In the range where is operating, the absolute position of the fourth floor is detected and the contact 4Aa is closed, so the position of the fourth floor is detected correctly.

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 within the range where the second detection device 8 is not operating. Even if the car position signal is incorrect, it can be corrected to an accurate position when the car 6 comes within the operating range of the second detection device 8. Furthermore, the transfer of the car position signal by the third and fourth detection devices 9 and 10 between floors is as follows:
This is done only at the first signal between floors. Therefore, as shown in FIG. 3, there is an advantage that the signal transition points can be set separately for rising and falling.

Further, if the cam 7 shares the end point switch cam, and the second detection device 8 is replaced by a device that detects the door opening/closing section, the space within the hoistway will not increase, which is desirable.

FIG. 5 shows another embodiment of the invention.

In the figure, (Ec to 4Ec are position detection relay 1 respectively)
Normally closed contacts of E to 4E, 14b and 15b are normally closed contacts of up and down travel relays 14 and 15, respectively.
Reference numeral 16 denotes a position detectability detection relay, and 16a is its normally open contact. The rest is the same as in FIG. 4.

The car 6 stopped due to a power outage, and its position was outside the operating range of the second detection device 8 on the first floor.
Assume that the power is within the operating range of the detection device 1A, that is, within the range of AB in FIG. 2, and that the power outage has been restored. At this time, up and down travel relay contacts 14
Since the position detection relay contacts 1Ec to 4Ec b and 15b are all closed, the position detection failure detection relay 16 is energized and the contact 16a is closed. Now (+)-16a-1Aa-1E-2Eb-4Eb-
The position detection relay 1E on the first floor is energized by the (-) circuit, and the contact 1Ea is closed. At this time, the contact 8a is open, the second detection relay 11 is deenergized, and the contact 11b is closed, so the position detection relay 1E is self-held and the position of the first floor is detected.

That is, in the case of Fig. 4, if the stop position of the car 6 is within the range A-B in Fig. 2, the position of the first floor will not be detected even if the contact 1Aa is closed because the contact 11a is open. However, this embodiment has made it possible.

FIGS. 6 and 7 also show other embodiments of the invention.

In Figure 6, 1Ax to 4Ax are the first detection device 1A
4A is the operating range, 1Fx to 4Fx is the operating range of the positioning relays 1F to 4F, and x is the overlapping range of the operating ranges 1Ax to 4Ax between adjacent floors.

In FIG. 7, 1Aa to 4Aa are normally open contacts of the first detection devices 1A to 4A on the 1st to 4th floors, respectively. In this embodiment, the cam 7 in FIG. No matter where you are on the road, you can press any one of the first detection devices 1A to 4A.
Therefore, one of the contacts 1Aa to 4Aa is always closed. 1F to 4F are position determination relays for the 1st to 5th floors, 1Fa to 4Fa are normally open contacts, 1
Fb to 3Fb are also normally closed contacts. Others are the same as in FIG.

Assume that the car 6 stops due to a power outage and its position is outside the operating range of the second detection device 8 on the first floor, but also within the operating range 1Ax of the first detection device 1A. When the power outage is restored, the position detection failure detection relay 16 is energized and the contact 16a is closed, as explained in FIG. On the other hand, the first detection device contact 1
Since Aa is closed, positioning relay 1F on the first floor is energized, contact 1Fa is closed, and contact 1Fb
is open. Now, as in the case of FIG. 5, the first floor position detection relay 1E is energized and the first floor position is detected.

When the stop position of the car 6 is in the overlapping range Positioning relays 1F and 2F are energized. However, the contact 1Fb is opened by the energization of the position determining relay 1F on the first floor, so the position determining relay 2F on the second floor is deenergized and the position of the first floor is detected.

In this way, no matter where the car 6 stops in the hoistway, any one of the position determination relays 1F to 4F is energized, so the car position can always be accurately detected.

In addition, if the conditions of the operating range 1Ax to 4Ax of the first detection devices 1A to 4A shown in Fig. 6 are not satisfied only due to the length of the cam 7, two switches should be installed per floor at appropriate intervals. , their output contacts can be connected in parallel.

As explained above, in this invention, a first detection device corresponding to each floor is installed, and a second detection device that detects a car in a narrower range than the first detection device becomes inactive and operates alternately on each floor. When the third or fourth detection device is activated, the car position is advanced to the next floor, and when the second detection device is activated, the car position is determined to be the floor indicated by the first detection device. This is what I did.

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. Furthermore, even if the car position signal is lost during a power outage, the car position can always be accurately detected.

[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. Fig. 4 is a circuit diagram, Fig. 5 is a circuit diagram showing another embodiment of the present invention, and Figs. 6 and 7 also show other embodiments of the invention. , FIG. 6 is an explanatory diagram of the operating range of the detection device and position detection relay in FIG.
The figure is a circuit diagram. 1A to 4A...first detection device on the 1st floor to the 4th floor, 1B
~4B...1st floor~4th floor cam, 2C~4C...2nd floor~
4th floor ascending cam, 1D to 3D...1st to 3rd floor descending cam, 1E to 4E...1st to 4th floor detection relay,
6...Cage, 7...Cam, 8...Second detection device, 9...
Third detection device, 10...Fourth detection device, 11...
Second detection relay, 12...Third detection relay, 1
3...fourth detection relay, 14a...upward traveling relay, 15a...downward traveling relay, 16... is position detection failure detection relay, and the same or equivalent parts in the drawings are indicated by the same reference numerals.

Claims (1)

[Claims] 1. A first detection device arranged in the hoistway corresponding to each floor to detect the car, and a first detection device arranged in the car to correspond to each floor and detect the car within a narrower range than the first detection device. a second detection device that operates and becomes inoperable when it no longer detects the car; a third and fourth detection device that operates when the car installed in the car reaches the front of each floor; and third and fourth detection devices that operate alternately on each floor;
a detection device, when the second detection device becomes inoperative and the third or fourth detection device operates, the position of the car is advanced to the next floor, and the second detection device is activated. When the car position is determined by the step, the step circuit that emits the car position signal corresponding to the floor indicated by the first detection device, and this step circuit are all inoperable and the second step An elevator position detection device comprising an emergency position detection circuit that emits a car position signal corresponding to the floor indicated by each of the first detection devices when the detection device is inoperable.