JPS6142715B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention provides a solution for when an elevator car breaks down.
This invention relates to an improvement in a device for directing adjacent cars to rescue.

When an elevator malfunctions and the car stops between floors and becomes inoperable, the passengers inside the car become extremely anxious and fearful, so they must be rescued as quickly as possible. However, when a car stops between floors due to a malfunction and passengers are trapped inside the malfunctioning car, there is no way to rescue them from the landing.
Stop the adjacent rescue basket to the side of the malfunctioning basket,
It is necessary to open the rescue doors on the side walls of both cars and pass the ramp to rescue the passengers.

Therefore, when an adjacent rescue car approaches the failed car, the stop position of the failed car is detected by mutual engagement (actual car position or engagement between car positions on the landing selector), and the system automatically detects the stopped position of the failed car. It has been proposed that the rescue car should be stopped to the side of the broken car.

Further, although the details will be described later, the pulses generated corresponding to the moving distance of the car are counted, the position of the failed car is set as the target stop position of the rescue car, and the difference between this and the current position of the rescue car is calculated. It has also been proposed to drive the rescue car so that this difference becomes zero and stop it on the side of the failed car.

However, none of the above methods takes into account the position of the failed car (rescue target position of the rescue car).

In other words, the failure car is either too far above the limit switch installed 20 to 30 mm above the floor on the top floor, or too far below the limit switch installed 20 to 30 mm below the bottom floor. (Generally, when the car is running and the limit switch is activated, the brakes are applied immediately to bring the car to a sudden stop.) The car position indicator installed inside the car at the landing or in the manager's room, etc. , only indicates that the failed car is on the top or bottom floor. (It is not known whether the broken car is located on the top floor or the bottom floor). Therefore, the rescue worker who saw this thought that the broken car could be rescued using the rescue car, and got into the rescue car and turned on the rescue switch.The rescue car then moved toward the broken car, and the rescue car also turned on its own limit switch. operate and suddenly stop.
As a result, rescuers riding in the rescue cage are also trapped inside the cage, increasing the damage.

The present invention solves the above-mentioned problems and provides a safe emergency rescue device for an elevator that does not trap people in the rescue car even if the faulty car passes the limit switch of the terminal floor. purpose.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. In addition, in the diagram, the numbers with a followed by a are car a (rescue basket), and the ones with b are b.
Indicates the equipment/elements belonging to the machine (failure basket).

In FIG. 1, 1 is the armature of the hoisting motor of the elevator, 2 is the sheave driven by the armature 1,
3 is a car, 4 is a counterweight, 5 is a main rope connected to the car 3 and the counterweight 4 and wound around the sheave 2, 6 is a speedometer generator directly connected to the armature 1, and 7 is a rope A pulse generator 8 is directly connected to the car 2 and generates pulses corresponding to the number of revolutions of the sheave 2, in other words, the distance traveled by the car 3, and when a call is registered in the car 3 or at the landing, it corresponds to that floor. 9 is a call signal from the management circuit that emits a digital signal.When the rescue car is heading for rescue, it becomes "1" when the rescue switch (not shown) inside the cage is closed, and when the rescue is completed and the switch is released, it becomes "0". The rescue switch signal 10 is the normal departure command signal, which becomes "1" when there is a call to answer and the car door closes, and becomes "0" when the car stops. 11 is a current value counter that counts pulses from the pulse generator 7 and outputs a digital signal corresponding to the current position of the car 3; 12 is a target position (call signal 8 and faulty car position signal Pb to be described later) and current value counter; This is a subtraction counter that calculates the difference between the contents of 11 and outputs a digital signal corresponding to this difference, and functions as a distance calculator. 13 is a nonlinear digital-to-analog converter that converts the signal of the subtraction counter 12 into a required deceleration curve and outputs an output X; 14 is a circuit that generates the acceleration pattern of the car 3 as an output Y; 15
16 is a switching circuit that compares the output Y of the acceleration pattern generator 14 and the output X of the digital-to-analog converter 13 and outputs the smaller one; 16 is a switching circuit 1;
A controller 17 compares the output of the speedometer generator 6 with the output of the speedometer generator 6 and outputs an output corresponding to the difference including the running direction. 18 is a determination circuit that constantly outputs an output and stops the output when the output of the subtraction counter 12 becomes zero; 19 is a determination circuit that outputs an output after a certain period of time when the output of the determination circuit 18 disappears; The stop timer 20 is a brake circuit that is activated when the input is no longer present. When this circuit is activated, a brake (not shown) restrains the sheave 2 and holds the car 3.
21 and 22 are comparators that output when the input signal of terminal A is larger than the input signal of terminal B, and the output signal of comparator 21 is the upstream direction signal U,
The output signal becomes the downstream signal D. 23, 24
is an OR gate, 25 and 26 are AND gates, and
The mark ○ means NOT. 27 is an upper limit switch that opens when the car goes too far upward by about 20 to 30 mm from the top floor, and 28 is a lower limit switch that opens when the car goes too far downward by about 20 to 30 mm from the bottom floor. These limit switches 27 , 28 is dangerous, so the car is brought to a sudden stop and the brakes are applied. Failure car current value counter 11b
The output signal Pb becomes the stop target position signal of the rescue car. The call and car position signals described here are all binary codes, and the correspondence between each position and the binary code is shown below. However, the building will be 4 stories high with a floor spacing of 3000mm. It is also assumed that the count is increased in 10 mm increments.

4th floor...10010110000 3rd floor...01110000100 2nd floor...01001011000 1st floor...00100101100 Next, the normal operation of machine a will be explained. The above rescue switch is opened and rescue switch signal 9a
is assumed to be "0".

When a call for the 3rd floor is registered at car 3a or the landing, the management circuit sends the 2nd floor corresponding to the called floor.
A call signal 8a having the base number "01110000100" is sent to the comparators 21a, 22a and the subtraction counter 12a through the AND gate 25a and the OR gate 24a. At this time, assuming that car a is on the first floor, a signal Pa of "00100101100" is emitted from the current value counter 11a. Since this value is smaller than "01110000100" of the third floor call signal 8a, the comparator 21a outputs the up direction signal Ua. In addition, the departure command signal 10a
is sent to the acceleration pattern generation circuit 14a through the OR gate 23a, and the acceleration pattern generation circuit 14a
generates an output Ya corresponding to the acceleration pattern shown at OB in FIG. On the other hand, converter 13a
As will be described later, an output Xa corresponding to a deceleration pattern as shown by C-B-A in FIG. 3 is generated. The switching circuit 15a compares the output Xa and the output Ya and selects the smaller one, but as it is clear from FIG. 3, the output Ya is smaller than the output Xa, so the acceleration pattern is sent to the control device 16a. . The control device 16a compares the acceleration pattern with the output of the speedometer generator 6a, commands acceleration in the upward direction using the upward direction signal Ua, and controls the thyristor so that the speed of the electric motor 1a faithfully follows the acceleration pattern. Controls the device 17a. On the other hand, since the pulse generator 7a outputs a pulse every time the car 3a moves a certain distance (in this case, 10 mm), by counting these pulses, it is possible to know the travel distance of the car 3a, that is, the current position of the car 3a. Since the output of the current value counter 11a indicates the current position of the car 3a, the output obtained by subtracting the contents of the current value counter 11a from the target position (call for the third floor), that is, the subtraction counter 12a
The output indicates the distance from the current position of the car 3a to the target position. Assuming that the car 3a decelerates at a constant deceleration d, the speed V of the car 3a must be V=√2 if the distance S to the target position is known. (However, the delay in the system is ignored.) The digital-to-analog converter 13a has the characteristics shown in the above equation, and calculates the current speed from the distance to the target position, A
Generates output Xa corresponding to the deceleration pattern shown in . When the values of output Xa and output Ya match at point B, a deceleration pattern along BA is thereafter sent to the control device 16a. The control device 16a controls the speed of the armature 1a to reduce in accordance with this deceleration pattern.

As car 3a approaches the third floor where the call is,
The difference between the target position and the contents of the current value counter 11a gradually becomes smaller. When the car 3a matches the target position, the difference becomes zero, so the output of the determination circuit 18a becomes zero, and the timer 19a outputs an output after a certain amount of time has elapsed. As a result, the brake circuit 20a is activated and the car 3a is restrained in that position.

Now, if Unit B were to malfunction for some reason and stopped in the middle of the hoistway between floors with no landing area, and became unable to move, it would be necessary to quickly move Unit A to the position of Unit B as a rescue aircraft.

In this case, when the rescue switch in the car 3a of the car 3a or in the machine room is turned on, the rescue switch signal 9a becomes "1", and the target position of the car a is replaced by the call signal 8a from the management circuit of the car B. The contents of the current value counter 11b are the AND gate 26a and
It is fed through the OR gate 24a.

In other words, OR gate 24a and AND gate 26
A is a setting means for setting the current position of the failed car to the target position of the rescue car. Therefore, car No. a is placed in exactly the same situation as if a call had occurred at the position of car 3b (not shown) of car No. B.
As a result, car 3a of car 3a is operated in exactly the same manner as the normal operation described above, approaches car 3a at high speed and stops. Its positional accuracy is determined by the pulse generator 7a.
Since it is only determined by the resolution of , an accuracy of several millimeters can generally be expected.

In the above description, a case has been described in which the B-car stops between floors with no landing, but the B-car opens the lower limit switch 28b located below the bottom floor.
A case will be described in which the vehicle travels further downward and then stops. When the lower limit switch 28b is opened, the pulse signal from the pulse generator 7b is no longer sent to the current value counter 11b. Therefore, the current value counter 11b stops counting at the position of the lower limit switch 28b, and its output limit stops at a point 20 to 30 mm below the floor where the lower limit switch 28b is installed, for example, "00100101010".

In other words, the limit switch 28b functions as a termination setting means for setting the target position of the rescue car not at the actual current position of the failed car, but at a position closer to the terminal floor.

Therefore, the target stop position of the machine a is the position of the lower limit switch 28b, so even if the above-mentioned automatic rescue operation is performed, the machine a is at the very edge of whether or not to operate its own lower limit switch 28a. Since the car stops at a point, the rescuers inside car 3a will not be trapped inside car 3a.

In other words, machine a has lower limit switch 28b.
The lower limit switch 28b is set as the target position and the car is decelerated to a stop, without setting the actual car position of the car No. B, which is located below the lower limit, as the target position. Therefore, the lower limit switch 28 descends at high speed.
This eliminates the problem of trapping people inside the car 3a by operating the car 3a.

In this case, if a switch is provided to detect the absolute position of the car on the first floor and this is used in place of the lower limit switch 28b, Car A heading for rescue will run with the first floor as its target position. Previous problems will be resolved.

4 to 7 show other embodiments of the present invention, and FIG. 1 is used as is in each case.

In Figure 4, 29 is a top floor position generator that always generates a position signal "10010110000" for the top floor (4th floor), and 30 is a top floor position generator that always generates a position signal "00100101100" for the bottom floor (1st floor). 31 and 32 are comparators similar to comparators 21 and 22, 33 is an OR gate, and 34 is an output signal that outputs the input signal as it is when the input signal at terminal T is "0". A register composed of a D flip-flop that stores the input signal as it is when the input signal at the terminal T becomes "1" and outputs the stored value as the output signal P even if the input signal changes thereafter. It is.

Now, if machine b goes too far down from the first floor, the input signal of the comparator 32b will be larger at terminal A than at terminal B, so the comparator 32b will output an output signal "1", so the signal will be OR gate 33b
The signal is input to terminal T of register 34b via. Therefore, the register 34b stores the value of the current value counter 11b at that time, and thereafter continues to output the stored value until the input signal at the terminal T becomes "0". Since the output signal of the register 34b becomes the target position signal Pb of the rescue car 3a, the rescue car 3a runs near the bottom floor as the target position, so the rescue car 3a operates the lower limit switch and suddenly stops. However, problems such as trapping people inside the rescue basket 3a are eliminated.

Note that the output signal of the lowest floor position generator 30b may be set to a value slightly higher than that of the lower limit switch 28b.

The above description has been made for the bottom floor, but the same applies to the top floor, so the explanation will be omitted.

In Figure 5, 35 to 37 are AND gates, 38 is
NOR gate, 39 is OR gate.

Now, when car No. b goes too far downward from the first floor, the input signal of the comparator 32b becomes larger at terminal A than at terminal B, so the comparator 32b issues an output signal "1". Therefore, the output signal of the NOR gate 38b becomes "0", closing the AND gate 37b. On the other hand, since the AND gate 36b is opened, the lowest floor position signal "00100101100" is transmitted from the lowest floor position generator 30b to the AND gate 36b, OR
Target position signal Pb of machine a through gate 39b
It is issued by The rescue car 3a will now travel with the lowest floor position as the target position.

Note that if machine b fails on the intermediate floor, comparators 31b and 32b will not emit output signals, so
AND gates 35b and 36b are closed. On the other hand, the output signal of the current value counter 11b is outputted as the target position signal Pb of machine a through the AND gate 37b and the OR gate 39b.

In FIG. 6, 27A and 27B are top open contacts of the upper limit switch similar to the upper limit switch 27, 27c is a normally closed contact, and 28A and 28B
is a normally open contact of the lower limit switch similar to lower limit switch 28, 28C is a normally closed contact, 40 is a counter that counts up the number of input pulses, and 41 is a subtractor that subtracts the value of counter 40 from the value of current value counter 11. 42 is an adder that adds the value of the current value counter 11 and the value of the counter 40, and 43 is an OR gate.

When Unit B operates the lower limit switch, contacts 28Ab and 28Bb close, and contact 28Cb closes.
is open. Then, when the No. b machine moves further downward from the position of the lower limit switch, the counter 40b transfers the pulse from the pulse generator 7b to the contact 2.
Counting via 8Bb. (The value of this counter is initially set to "0" by a circuit not shown.
has been reset to . ) During that time, the adder 42b adds the value of the current value counter 11b and the value of the counter 4.
0b is added, and the added value (the added value always indicates the position where the lower limit switch is installed) is output. After that, when the failure car 3b stops, the current value counter 11b also changes to the counter 40b.
also stops counting. At that time, adder 42b
The output signal is output as the target position signal Pb of the rescue car 3a via the contact 28Ab and the OR gate 43b. The rescue car 3a will now travel towards the target position.

Furthermore, even when the car 3b travels up and the upper limit switch is operated, the amount of travel thereafter (the value counted up by the counter 40b via the contact point 27Bb) is similarly stored in the current value counter 11b.
The target position is always set to the upper limit switch position by subtracting the value from the value using the subtractor 41b.

Further, the above addition and subtraction are performed using the subtraction counter 12a.
It is also possible to calculate with .

Also, instead of the upper and lower limit switches, switches are provided to detect the top and bottom floors.
You can do the same thing using that.

In FIG. 7, 44a is an OR gate.

This embodiment is an application of the embodiment of FIG.

In other words, in the embodiment shown in FIG. 6, the overshooting amount of the failed car 3b is counted, and these values are subtracted (added) from the actual car position, so that the target position of the rescue car 3a is apparently near the top floor (the highest floor). (near the floor on the lower floor)
I have to. However, in the embodiment shown in FIG. 7, the overshooting amount of the failed car 3b is counted, and that value is added (subtracted) to the current position of the rescue car 3a, so that the current position of the rescue car 3a is apparently moved upward (downward). shift. As a result, although the target position has gone too far, the position of the rescue car 3a is changed to the faulty car 3 by that much.
Since it will move in the direction away from b,
The rescue basket 3a will run toward the vicinity of the top floor (bottom floor).

Note that the operation in FIG. 7 is similar to that in FIG. 6 and can be easily understood, so a detailed explanation thereof will be omitted.

Although the above embodiments have been described with respect to electrical means for counting pulses according to the amount of movement, the same concept can be applied to other electrical means. Also,
Needless to say, the present invention can be similarly implemented using mechanical means such as the elevator car mutual alignment device disclosed in Japanese Patent Application Laid-Open No. 49-7946.

As explained above, when the rescue car is operated with the position of the failed car as the target stop position of the rescue car, when the limit switch of the terminal floor of the failed car is operated, the target stop position of the rescue car is set to the limit switch. The present position of the rescue car can be set by moving the current position of the rescue car in a direction away from the failure car by more than the distance that the failure car has gone beyond the limit switch from its actual position.

This makes it possible to prevent a rescuer heading to rescue a malfunctioning car from becoming trapped inside the rescue car.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram for elevator No. A showing an embodiment of an emergency rescue system for an elevator according to the present invention.
Figure 2 is a block circuit diagram of the main parts for machine B in Figure 1,
FIG. 3 is a curve diagram showing the relationship between elevator speed and position, and FIGS. 4 to 7 are diagrams corresponding to FIG. 2 showing other embodiments of the present invention. 1a...Hoisting motor armature, 3a...Rescue cage, 7a...Rescue cage pulse generator, 7b...
Pulse generator for failed car, 9a...Rescue switch signal, 11a...Current value counter for rescue car (current position detector), 11b...Current value counter for failed car (current position detector), 12a...Rescue Car subtraction counter (distance calculator), 13a... Digital-to-analog converter on the left, 15a... Same on the left switching circuit, 16a... Same on the left control circuit, 17a... Thyristor device on the left, 27a, 28a... Upper and lower limit switches on the same on the left. , 27b, 28b... Upper and lower limit switches for faulty cars (termination setting means), 40b... Counter (overshoot detection circuit). In addition, the same parts or corresponding parts in the figures are indicated by the same reference numerals.

Claims (1)

[Claims] 1. A current position detector that is provided for each of a plurality of elevators managed as a group and detects the current position of each car, and subtracts the target position corresponding to a call from the current position of the car. A distance calculator that raises and lowers the car and stops it at the target position based on the result of this subtraction; a rescue switch that commands rescue operation to the failed car by external operation when an adjacent car fails; a setting means for setting the current position of the failed car to the target position of the rescue operation car; a limit switch that operates when the car has passed a terminal floor by a predetermined distance to stop the car; and a limit switch that activates the limit switch when the car has failed. The emergency rescue device for an elevator is provided with a terminal setting means for setting a target position within the predetermined distance including the position of the terminal floor by operating the rescue switch. 2. The termination setting means includes an overtravel detection circuit that detects the distance that the faulty car has passed the limit switch, and an overtravel distance that is added or subtracted from the current position of the faulty car to move the faulty car from the faulty car by the above-mentioned overtravel distance. 2. The emergency rescue system for an elevator according to claim 1, further comprising an adder/subtractor that outputs a position close to a terminal floor as a target position.