JPH08217350A - Elevator derailment detection device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an elevator derailment detection device capable of detecting that a car or a counterweight has come off a guide rail without requiring a conductive wire. [Configuration] Car position detecting means 1 for detecting the car position
2 and a low speed operation command means 14 for outputting a low speed operation command
A building vibration detecting means 17 for detecting that the vibration of the building exceeds a predetermined seismic intensity, an ascending / descending speed detecting means 18 for detecting an ascending / descending speed of the car, and a variation range of the ascending / descending speed of the car. When the building vibrates, the car is operated at a low speed to determine whether the fluctuation range of the hoisting speed exceeds the predetermined value on the middle floor of the hoistway. judge.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator derailment detecting device for detecting that at least one of a car and a counterweight provided in an elevator has come off a guide rail.

[0002]

2. Description of the Related Art FIG. 4 is an explanatory view showing the general construction of a general elevator, FIG. 5 is an enlarged view showing a counterweight and a guide rail provided in the elevator shown in FIG. 4, and FIG. FIG. 6 is an explanatory view showing a state where a counterweight provided in the elevator of FIG.

In a building 1 shown in FIG. 4, a hoistway 3 is formed over a plurality of floors 2, and a machine room 4 is provided above the hoistway 3. The elevator installed in this building 1 includes a car 5 and a counterweight 6 that move up and down in the hoistway 3, a pair of guide rails 7 that guide the counterweight 6, and a pair of guides (not shown) that guide the car 5. A rail, a hoisting machine 9 that is installed in the machine room 4 and that raises and lowers the car 5 and the counterweight 6 in opposite directions via the main ropes 8, and a control panel 10 that controls the hoisting machine 9. I have it. The guide rail 7 is
It is attached to the wall portion of the hoistway 3 via a plurality of attachment portions 11 arranged at predetermined intervals.

In such an elevator, as shown in FIG.
As shown in FIG. 3, the counterweight 6 moves up and down in the hoistway 3 while being engaged with the guide rail 7. However, when the building 1 vibrates abnormally due to an earthquake or the like, as shown in FIG. 6, the counterweight 6 may come off the guide rail 7 or the car 5 may come off the guide rail (not shown).

Therefore, conventionally, for example, JP-A-58-9508 is used.
As described in Japanese Patent No. 4 publication, a conductive wire stretched in parallel along a guide rail 7 and the like, a conductive wire ring attached to the car 5 or the counterweight 6 and surrounding the conductive wire, Elevator derailment detection that includes a detection relay that operates when the conducting wire ring comes into contact with the above-mentioned conductive wire, and detects that the car 5 or the counterweight 6 is disengaged from the guide rail 7 or the like by the operation of this detection relay. A device has been proposed.

[0006]

By the way, in the above-described conventional rail derailment detection device, it is necessary to lay a conductive wire along the guide rail 7 and the like and to lay a wire connected to the conductor ring. However, there was a problem that these tasks require considerable effort and time.
In addition, when the hoistway 3 is high as in a high-rise building, for example, the conductive wire becomes long, so that the conductive wire easily swings in the middle portion, and as a result, even when the counterweight 6 is not disengaged from the guide rail 7. However, there is a concern that the intermediate portion of the conductive wire swings as described above to come into contact with the conductor ring and cause a malfunction.

The present invention has been made in view of the above-mentioned circumstances in the prior art. A first object of the present invention is that at least one of a car and a counterweight is a guide rail without requiring a conductive wire or a conductor ring. It is an object of the present invention to provide an elevator derailment detection device capable of detecting that the vehicle is disengaged.

The second purpose is to prevent secondary accidents of the car and the counterweight when the building vibrates abnormally due to an earthquake or the like, and to protect the car and the counterweight from these secondary accidents. It is an object of the present invention to provide a rail derailment detection device capable of detecting that at least one of the rails has come off the guide rail.

A third object of the present invention is to provide an elevator derailment detecting apparatus capable of accurately performing the above detection.

[0010]

In order to achieve the above first object, the invention according to claim 1 of the present invention is that at least one of a car and a counterweight provided in an elevator is disengaged from a guide rail. In the elevator derailment detection device for detecting the above, the ascending / descending speed detecting means for detecting the ascending / descending speed of the car and outputting the ascending / descending speed signal, and the fluctuation range of the ascending / descending speed is predetermined based on the ascending / descending speed signal. And a speed fluctuation determining means for determining whether or not a predetermined value is exceeded.

Further, in order to achieve the above second object,
According to a second aspect of the present invention, in addition to the above configuration,
A building vibration detection unit that detects that the vibration of a building equipped with an elevator exceeds a predetermined seismic intensity and outputs a vibration detection signal, and a car according to the output of the vibration detection signal from this building vibration detection unit. A low speed operation command means for outputting a command to operate at a low speed, and during the low speed operation of the car, whether the fluctuation range of the ascending / descending speed of the car exceeds a predetermined value by the speed fluctuation determining means. The judgment is made.

In order to achieve the above-mentioned third object,
According to a third aspect of the present invention, in addition to the above configuration,
When the car is located on the intermediate floor of the hoistway, it includes the car position detecting means for detecting the height position of the car and outputting the car position signal. It is configured to determine whether or not the fluctuation range of the speed exceeds a predetermined value.

[0013]

Since the invention according to claim 1 of the present invention is configured as described above, the ascending / descending speed of the car is detected by the ascending / descending speed detecting means, and the fluctuation range of the ascending / descending speed is set to a predetermined value. Whether or not the speed is exceeded is judged by the speed fluctuation judging means. For example, when at least one of the car and the counterweight is out of alignment with the guide rail, the fluctuation range of the ascending / descending speed is larger than in normal times, so if the above range of the ascending / descending speed exceeds the predetermined value. , It is determined that the car or the counterweight has come off the guide rail. Accordingly, it is possible to detect that at least one of the car and the counterweight has come off the guide rail, without the need for a conductive wire or a conductor ring.

Since the invention according to claim 2 of the present invention is configured as described above, when the vibration of the building equipped with the elevator exceeds a predetermined seismic intensity, the building vibration detection means outputs the vibration detection signal. In response to the output of this vibration detection signal, the low speed operation command means outputs a command to operate the car at a low speed, and the car is operated at a low speed. Next, during the low speed operation of the car, it is judged by the speed fluctuation judging means as described above whether or not the fluctuation range of the ascending / descending speed of the car exceeds a predetermined value. As a result, at the time of abnormal vibration of the building due to an earthquake or the like, at least one of the car and the counterweight has come off the guide rail while preventing a secondary accident of the car and the counterweight. Can be detected.

Since the invention according to claim 3 of the present invention is configured as described above, the fact that the car is located on the intermediate floor of the hoistway is detected by the car position detecting means. As described above, the speed fluctuation determining means determines whether or not the fluctuation range of the ascending / descending speed of the car has exceeded a predetermined value. This eliminates the need to perform the above speed change determination when the car decelerates on the top or bottom floor of the hoistway, so it is important to know that at least one of the car and the counterweight has come off the guide rail. Can be detected well.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the rail derailment detecting apparatus of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the rail derailment detection apparatus of the present invention including the invention described in claims 1, 2, and 3, and FIG. 2 illustrates the operation principle of the rail derailment detection apparatus of FIG. Fig. 3 and Fig. 1
3 is a flowchart showing a processing procedure of the rail derailment detection device. In addition, in FIGS. 1 and 2, the same components as those shown in FIGS. 4 to 6 described above are designated by the same reference numerals.

In general, an elevator is, as shown in FIG.
A car position detecting means 12 that detects the height position of the car 5 and outputs a car position signal, and a normal operation command that is connected to the car position detecting means 12 and that outputs a normal operation command of the car 5. Connected to the means 13 and the position detection means 12,
Low speed operation command means 1 for outputting a low speed operation command of the car 5
4, switching means 15 for switching the connection paths of the normal operation command means 13 and the low speed operation command means 14, and a hoisting machine drive circuit 16 connected to the switching means 15 and driving the hoisting machine 9. are doing.

The rail derailment detector of this embodiment is
Together with the above-mentioned car position detecting means 12 and low speed operation command means 14, it detects that the vibration of the building 1 exceeds a predetermined seismic intensity and outputs a vibration detection signal to the normal operation command means 13 and the low speed operation command means 14. The building vibration detecting means 17, the ascending / descending speed of the car 5, and the ascending / descending speed detecting means 18 for outputting the ascending / descending speed signal to the normal operation command means 13, the low speed operation command means 14, etc. Based on this, it is determined whether or not the fluctuation range of the ascending / descending speed of the car 5 exceeds a predetermined value, and if it exceeds the above predetermined value, a speed fluctuation determination that outputs a speed abnormality signal to the low speed operation command means 14 is made. Means 19 and. The normal operation command means 13, the low speed operation command means 14, the speed variation determination means 19, etc.
It is built in the control panel 10.

In this embodiment, at least one of the car 5 and the counterweight 6 is guided by the guide rail 7 in accordance with the abnormal vibration of the building 1 according to the processing procedure shown in FIG.
It is designed to detect when something is out of the range. That is, first, when the building vibration detecting means 17 detects that the vibration of the building 1 exceeds a predetermined seismic intensity in step S1, the vibration detection signal is sent to the normal operation commanding means 13
And to the low speed operation command means 14. On the other hand, during normal times when the above vibration detection signal is not output, the normal operation commanding means 13 is responsive to the car position signal output from the car position detecting means 12 and the hoisting speed signal output from the hoisting speed detecting means 18. Outputs a normal operation command via the switching means 15, so that the hoist drive circuit 16 supplies electric power to the hoist 9 in accordance with the normal operation command so that the car 5 operates at a normal speed. Is performed.

When the above vibration detection signal is output, in step S2, the normal operation commanding means 13 determines whether or not the car 5 is operating based on the ascending / descending speed signal output from the ascending / descending speed detecting means 18. judge. At this time, when it is determined that the car 5 is in operation, the normal operation command means 13 outputs an emergency stop command for stopping the car 5 to the hoisting machine drive circuit 16 via the switching means 15. Along with this, after the car 5 stops at the nearest floor of the plurality of floors 2 in step S3, the low speed operation command means 14 causes the switching means 15 to move from the normal operation command means 13 side to the low speed operation command means 14 side. Switch to.

Then, in step S4, when the operation of the building vibration detecting means 17 is stopped, it is judged that the vibration of the building 1 is stopped, and the low speed operation command means 14 switches the command for operating the car 5 at low speed. Through the hoisting machine drive circuit 16
In step S4, the hoisting machine drive circuit 16 supplies electric power to the hoisting machine 9 in accordance with the above-mentioned low speed operation command, so that the car 5 moves up and down at a low speed in the direction in which the car 5 does not approach the counterweight 6. To do.

Next, when the acceleration after the activation of the car 5 is completed in step S6, the car 5 decelerates at the end floor of the floors 2 (that is, the top or bottom floor) in step S7. It is determined whether it has started, and in step S8 it is determined whether the deceleration of the car 5 is completed. After the car 5 completes deceleration and stops at the end floor, in step S9, the low speed operation command means 14 switches the switching means 15 from the low speed operation command means 14 side to the normal operation command means 13 side to perform the normal operation command. Is output and the hoisting machine drive circuit 16 supplies electric power to the hoisting machine 9 in response to the normal operation command, whereby the normal operation of the car 5 is started.

On the other hand, in the above step S7, the car 5 is placed on the floor 2
If it is located on the middle floor, that is, not on the end floor, in step S10, based on the ascending / descending speed signal output from the ascending / descending speed detecting means 18, a predetermined range in which the range of the ascending / descending speed is predetermined is set. Whether or not the speed is exceeded is judged by the speed fluctuation judging means 19. For example, in a normal state where the car 5 or the counterweight 6 is engaged with the guide rails 7 or the like, that is, in a normal state where the car 5 or the counterweight 6 is not disengaged, as shown in FIG. It is almost constant on the floor, and the fluctuation range of the lifting speed is relatively small. However, when the balance weight 6 is abnormally disengaged from the guide rail 7, when the guide rail 7 comes into contact with a plurality of mounting portions 11 for mounting the guide rail 7 on the wall of the hoistway 3, the car 5 is abnormally disengaged from a guide rail (not shown). Since the same applies to the above, as shown in FIG. 2B, the fluctuation range of the ascending / descending speed on the intermediate floor of the hoistway 3 becomes large. Therefore, when the fluctuation range of the ascending / descending speed exceeds the predetermined value shown by the broken line in FIG. 2B, it is determined that the car 5 or the counterweight 6 is disengaged from the guide rail 7 or the like. Next, in step S11, as described above, a message indicating that the car 5 or the counterweight 6 is disengaged from the guide rail 7 is displayed, and the car 5 is stopped.

In the above step S2, the car 5 is placed on the floor 2
When the vehicle is stopped in any of the
Thus, the switching means 15 is switched from the normal operation commanding means 13 side to the low speed operation commanding means 14 side, and the procedure proceeds to step S4.

In the embodiment thus constructed, when the building 1 vibrates abnormally due to an earthquake or the like, at least one of the car 5 and the counterweight 6 does not require a conductive wire or a conductor ring as in the conventional case. It can be detected that the guide rail 7 is disengaged, and at this time, a secondary accident can be prevented by operating the car 5 and the counterweight 6 at a low speed.

Further, in this embodiment, when the car 5 decelerates on the uppermost floor or the lowermost floor of the hoistway 3, it is not necessary to judge the above-mentioned speed fluctuation, so that the car 5 and the balance weight 6 It is possible to accurately detect that at least one of them has come off the guide rail 7 or the like.

[0027]

Since the invention according to claim 1 of the present invention is configured as described above, at least one of the car and the counterweight is formed from the guide rail without the need for a conductive wire or a conductor ring as in the conventional case. Since it is possible to detect the detachment, it is not necessary to stretch the conductive wire or lay the wiring of the conductor ring, so that the labor and time can be reduced and the working efficiency can be improved. Furthermore, even if the hoistway is high, such as in a high-rise building, there is no need to worry about malfunctions due to the deflection of the conductive wire.
Therefore, there is also an effect that the reliability of the above detection operation can be improved.

Further, since the invention according to claim 2 of the present invention is configured as described above, when the building is abnormally vibrated due to an earthquake or the like, while preventing secondary accidents of the car and the counterweight, It is possible to detect that at least one of these is disengaged from the guide rail, and therefore there is an effect that safety can be improved.

Since the invention according to claim 3 of the present invention is configured as described above, when the car decelerates at the uppermost floor or the lowermost floor of the hoistway, the above speed fluctuation is not determined. Thus, it is possible to accurately detect that at least one of the car and the counterweight is disengaged from the guide rail, and thus a highly reliable elevator derailment detection device can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment including the invention described in claims 1, 2 and 3 of an elevator derailment detection apparatus of the present invention.

FIG. 2 is a diagram for explaining the operation principle of the rail-releasing detection device of FIG.

FIG. 3 is a flowchart showing a processing procedure of the rail derailment detection device of FIG.

FIG. 4 is an explanatory diagram showing an overall configuration of a general elevator.

5 is an explanatory view showing, in an enlarged manner, a portion of a counterweight and a guide rail provided in the elevator of FIG.

6 is an explanatory view showing a state where a counterweight provided in the elevator of FIG. 4 is disengaged from a guide rail.

[Explanation of symbols]

 1 building 5 car 6 balance weight 7 guide rail 9 hoisting machine 12 car position detecting means 14 low speed operation command means 17 building vibration detecting means 18 ascending / descending speed detecting means 19 speed fluctuation judging means

Claims (3)

[Claims] 1. An elevator derailment detection apparatus for detecting that at least one of a car and a counterweight provided in an elevator has been disengaged from a guide rail, and detects an ascending / descending speed of the car and outputs an ascending / descending speed signal. Elevator derailment detection, characterized in that it has an ascending / descending velocity detecting means and a speed variation determining means for determining whether or not the variation range of the ascending / descending velocity exceeds a predetermined value based on the ascending / descending velocity signal. apparatus. 2. A building vibration detecting means for detecting that the vibration of a building equipped with an elevator exceeds a predetermined seismic intensity and outputting a vibration detecting signal, and a vibration detecting signal output from the building vibration detecting means. According to a low-speed operation command means for outputting a command to operate the car at a low speed, and when the car is operating at a low speed, a predetermined value for which the fluctuation range of the ascending / descending speed of the car is predetermined by the speed fluctuation determining means. The derailment detecting device for an elevator according to claim 1, wherein it is determined whether or not it has exceeded. 3. A car position detecting means for detecting a height position of the car and outputting a car position signal, wherein when the car is located on the intermediate floor of the hoistway, the speed variation determining means is used. 2. The rail derailment detection device for an elevator according to claim 1, wherein it is determined whether or not the fluctuation range of the ascending / descending speed of the car exceeds a predetermined value.