KR100208423B1 - Safety apparatus of elevator - Google Patents

Abstract

Obtain an elevator safety device that can automatically set an operating time limit for the safety device.

The safety device of an elevator according to the present invention includes: floor detection means for detecting a floor and outputting a position signal, counting means for counting the number of pulses generated in accordance with a moving distance of the car, and outputting the position signal. The level calculation means for obtaining the level position of each layer according to the value of the counting means at the time of occurrence, the layer level position and the rated speed of the uppermost layer and the lowest layer among the level positions of the layer, and the rated speed thereof. All stroke traveling time calculating means for calculating the whole stroke traveling time from a losing constant, Operation time setting means for setting an operation time limit according to the all stroke driving time, and car state detecting means for detecting the state that the car is not moving. A stop signal output for outputting a stop signal for stopping the elevator when the state in which the car cannot be moved continues beyond the operation time limit. It is provided with a stage.

Description

Elevator safety device

1 is a schematic configuration diagram of a conventional elevator control apparatus applied to an embodiment of the present invention.

2 is a block diagram showing the configuration of the microcomputer shown in FIG.

3 is a block diagram showing the configuration of the counting circuit shown in FIG.

4 is a flowchart showing operation by the safety device of the elevator of one embodiment of the present invention.

FIG. 5 is a diagram showing acceleration and velocity shapes illustrating one embodiment of the present invention. FIG.

Fig. 6 is a flowchart showing operation by the safety device of the elevator of another embodiment of the present invention.

Fig. 7 is a flowchart showing operation by the safety device of the elevator of still another embodiment of the present invention.

Fig. 8 is a flowchart showing operation by the safety device of the elevator of still another embodiment of the present invention.

9 is a flowchart showing operation by the safety device of the elevator of still another embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

7: counter circuit 8: microcomputer

11: position detector 12: position detector

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for an elevator, and more particularly to a safety device for stopping a car when a rope is slipped on a sheave with a foreign material or the like.

When a rope is slipped on a sheave due to foreign matter or the like, the conventional elevator safety device for stopping the car has stopped the elevator car by setting the operation time limit of the safety device to a constant value.

On the other hand, the operating time limit of the safety device is defined in BS 56 55 Part 1. 10. 6. 2 of the British Standards Institution (BSI).

Related to the calculation of the previous process travel time is a control device by detecting the position of the floor of an elevator as described, for example, in JP-A-60-197572.

In the conventional safety device of an elevator, the operation time limit of the safety device is fixed, and therefore the setting of the operation time limit cannot be freely changed.

Thus, for example, a method of calculating the total travel time in advance, storing the value in the storage means and setting the operation time limit is considered. However, since the value changes for each elevator, the design means is calculated one by one. There was a problem that the margin was reduced due to the actual installation error of the elevator.

The present invention aims at eliminating the above-mentioned drawbacks and aims at obtaining an elevator safety device which can automatically set an operating time limit of the safety device to an appropriate value.

The safety device of an elevator according to the present invention includes floor detection means for detecting a floor and outputting a position signal, counting means for counting the number of pulses generated according to the moving distance of the car, and outputting the position signal. In accordance with the value of the counting means at the time of determination, from the level calculation means for obtaining the level position on each layer, from the top and bottom layer level levels, the rated speed and the rated speed of the level positions on the layer. All-stroke running time calculating means for calculating the all-stroke running time from a losing constant, an operating time setting means for setting an operating time period according to the all-stroke running time, and a car state detecting means for detecting a state that the car is not moving. Stop signal output means for outputting a stop signal for stopping the elevator when the state in which the car cannot be moved continues beyond the operation time limit And a.

Moreover, when the said layer level position is not calculated | required, the abnormal time operation time setting means used as a predetermined operation time limit is provided.

Further, when traveling at a constant speed other than the rated speed, speed setting means for setting the constant speed instead of the rated speed is provided.

Further, travel time measurement means for measuring the travel time each time the car travels, end-to-end travel detection means for detecting travel between end layers, and the travel time between the end layers when the travel between the end layers is detected. Priority operation time setting means is provided for making time and at the same time invalidating the operation time limit to set the traveling time between the end layers as the priority operation time.

Moreover, when there is little use of an elevator, it is provided with the end-to-end layer direct drive means which makes a direct drive between the said end floors.

Embodiment 1

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of this invention is described according to drawing.

1 is a schematic configuration diagram showing a control device of an elevator traveling on several floors shown in Japanese Patent Application Laid-Open No. 60-197572.

2 is a block diagram showing the configuration of the microcomputer shown in FIG. 1, and FIG. 3 is a block diagram showing the configuration of the counting circuit shown in FIG.

4 is a flowchart showing the operation of the safety device of the elevator of the present invention.

In FIG. 1, 1 is an elevator car, 2 is a counterweight, 3 is a rope hung on the sheave 4, and a car 1 and a counterweight 2 are coupled to both ends of the rope 3, respectively. have.

5 is a motor for driving the sheave 4, 6 is a pulse generator for generating a pull proportional to the moving distance of the car 1 from the rotation of the motor 5, 7 is a pulse generator for counting the pulse from the pulse generator (6) A counting circuit, 8 is a microcomputer which takes a signal from the counting circuit 7 and performs a predetermined arithmetic processing, 9 is on a floor, 10 is on a hoistway corresponding to each floor, and 11, 12 are car ( With the position detector provided in 1), when the car 1 reaches the level position on each floor, the position detector (1) sends the output signals 11a and 12a to the counter circuit 7 and the microcomputer 7, respectively. 11) is a layer 30mm from 10mm below the layer, the position detector 12 outputs a signal at 10% n layered from 300mm below.

As shown in FIG. 2, the microcomputer 8 is composed of a CPU 8a, a ROM 8b, a RAM 8c, an input port 8d, and an output port 8e.

As shown in FIG. 3, the counting circuit 7 includes counters CT1 and CT2 composed of 4-bit binary circuits, and the output terminal 6a of the pulse generator 6 is connected to the T terminal of the counter CT1. The T terminal of the counter CT2 is applied directly through the AND circuit NAND1 and the NOT circuit NOT1. Therefore, the counters CT1 and CT2 are connected to the car 1 between the operation cycles of the microcomputer 8. The running pulse is counted and stored, and this count value is input to the CPU 8a through the input port 8d in the next input process.

In addition, the counting circuit 7 includes RS flip-flops (hereinafter referred to as flip-flops) FF1 and FF2, and each of the Q outputs of each of the flip-flops FF1 and FF2 is connected to an input of an OR circuit OR1. The output signal of OR1 is applied as the other input of the NAND circuit NAND1.

NAND circuits, outputs of NAND2, and NAND3 are respectively connected to the set terminals S of each of the flip-flop FF1 and FF2, and output signals 11a of the position signals 11 and 12 are connected to the NAND circuits, NAND2 and NAND3, respectively. NOR circuit NORI, which is the logic of (12a), is provided, and the output signal of this NOR circuit 1 is made into one input of NAND2 through the NOT circuit NOT, and the other input of this NAND circuit NAND2 The signals obtained from the NOT circuit NOT3 are applied to the signals output through the NOT circuit NOT2 and the time constant circuit consisting of the resistor R1 and the capacitor C1, and the signals obtained through the NOT circuit NOT3 or the NOT circuit NOT2 and the time constant circuit are respectively NOT. It is applied to 2 inputs of NAND circuit NAND3 through circuits NOT4 and NOT5.

This causes flip-flops FF1 and FF2 to be set in the rising and falling of the outputs of the NAND circuits, NAND2 and NAND3, that is, the logic signals of the output signals 11a and 12a of the position detector 11 or 12. When counting, the counter CT2 takes a counting stop.

The reset signals RESET generated from the microcomputer 8 are applied to the reset terminals R of the counters CT1, CT2 and the flip-flops FFI, FF2.

Next, operation | movement of one Embodiment of this invention is demonstrated.

With respect to the above known elevator control apparatus, by the configuration of FIGS. 1 to 3, each gun position point (for example, 300 mm above and below the floor) is recorded in the RAM, and each charge is based on the average value of this position point. Control the elevator by finding the level of the image.

The operation of one embodiment of the present invention will be described with the flowchart of FIG. The operation displayed in this flowchart is executed by the microcomputer 8 every predetermined period.

First, in step 20, it is determined whether the car is traveling or not, and in step 21, the CAST is set to 0 if not driving.

This is a counter for measuring the state in which the car on the road does not move, and the process for setting it to 0 during stop.

Next, in step 22, the total stroke travel time TCAL is obtained.

This all-stroke travel time TCAL indicates that when the car is driven to the acceleration shape as shown in Fig. 5, 5 is the travel distance of the previous stroke and VTOP is the rated speed, The constant acceleration between when the car starts running and reaches the rated speed, the time until Tj becomes zero acceleration, and Ta becomes closer to the rated speed. Time until becomes 0, Accelerated acceleration from the rated speed until the car slows down and stops Acceleration time and Ti until If it is time until is 0,

Obtained by

At this time, S is represented by the area a-b-c-d of the velocity shape of FIG.

It is defined as the difference between the position of the floor level of the uppermost floor and the lowermost floor as it becomes the positive mileage.

You can do it.

Again,-(1 / 24x xTj xTj-1 / 24xaxTaxTa- 1 / 24x xTdxTd + 1 / 24x xvi xTj) / VTOP + VTOP / (2x ) + VTOP / (2x ) + (Tj + Ti) / 2

Is a value determined by the rated speed YTOP when the acceleration-shaped elements (acceleration a or the speed time Tj, etc.) are considered to be constant, and can be stored in advance as a predetermined value CTOP in the ROM 8b. It can be obtained by the highest floor level position STOP-lowest floor level position STOT) / VTOP + CFOP.

Next, the operation time limit of the safety circuit device is calculated and set in steps 23 to 26.

That is, if TCAL is less than 10 seconds, in step 24, if 20 seconds TCAL + 10 seconds is less than 45 seconds, in step 25 TCAL + 10 seconds in TAST, if TCAL + 10 seconds is more than 45 seconds, set 45 seconds in TAST in step 26. do.

This is an example of the operation time limit reference of the safety device of an elevator, and this operation time limit is stored in the ROM 8b shown in FIG.

On the other hand, when it recognizes driving in step 20, it is determined in step 27 whether the car is moving or not.

If it is moving, it is considered normal and in step 28 the CAST is set to zero.

This is a process for continuously measuring the non-moving state.

Next, if it is recognized that the unit does not move in step 27, the GAST is incremented to measure the abnormal continuation state in step 29.

This makes it possible to detect whether the operating time set in steps 23 to 26 has been reached by adding the CAST when the fourth degree is processed for each operation period.

That is, it is determined in step 30 whether CAST is equal to or greater than TAST, and if it is equal to or greater than TAST, a stop signal for stopping the elevator is output in step 31 to stop the elevator.

Thus, the safety device of the elevator of this embodiment is well-known layer detection means which are attached to the car, and are the detectors 11 and 12 which detect a floor and output a position signal, and well-known counting means, A counting circuit 7 for counting the number of pulses generated according to the moving distance, well-known level calculating means for obtaining the level position on each floor according to the value of the counting means when the position signal is output, and the level on the floor All-stroke running time calculating means (22) which calculates the all-stroke running time from the uppermost floor and the lowest floor of the position, the rated speed and the constant determined from this rated speed, and the operation time limit according to the all-stroke running time. Operation time setting means which becomes step 23-step 26 which set the following, step 27 which detects the state which a car cannot move, and the state which a car cannot move, When the continued, will having a stop signal output means that 29~ step to step 31 which outputs a stop signal to stop the elevator.

Therefore, it is possible to obtain accurate all-stroke running time, set the operation time limit automatically and automatically, and it is not necessary to store the all-stroke running time in the storage means that can be read for each elevator. none.

In addition, the detection that the car does not move can be detected from the value of the counting circuit 7 not changing or the position detectors 11 and 12 not operating.

[Embodiment 2]

Hereinafter, another embodiment of this invention is described with reference to drawings.

6 is a flowchart showing the operation of this embodiment.

Moreover, since FIG. 6 only changed the part enclosed with the dashed-dotted line | wire in FIG. 4, the changed part is demonstrated.

In step 40, it is determined whether or not the floor level position is measured. If it is not measured, 45 seconds is set in step 26 as the whole stroke travel time.

This is to avoid incorrect setting of the tripping time for abnormal strokes by using the unleveled laminar level position.

Thus, it is a setting means for the time of operation | movement at abnormal time, and is provided with step 40 which makes it the predetermined operation time limit, when the layered level position is not calculated | required.

Therefore, when the laminar position has not yet been obtained, the predetermined value can be set as the operation time limit, and it is possible to avoid using an incorrect all-stroke running time from the abnormal laminar position.

Moreover, not only the measurement of the floor level position but also the method of not calculating the whole stroke travel time, when detecting the collapse of the value of the floor level position by the abnormality of RAM 8c etc. is considered.

Further, even before the measurement of the entire stroke traveling time, the predetermined time, that is, the reference operating time, can be automatically set to the allowable longest time.

[Embodiment 3]

Hereinafter, another embodiment of this invention is described with reference to drawings.

7 is a flowchart showing the operation of the present embodiment.

In addition, since FIG. 7 only changed the part enclosed by the dashed line with respect to FIG. 6, the changed part is demonstrated.

First, in step 50a, the driving time is not calculated in the same operation mode (VTOP) as in the previous operation cycle, and the calculation is performed again in the other operation mode than the last time.

At this time, the last operation mode is stored in VTOPM, and the operation is judged by comparison between VTOPM and YTOP.

Next, in step 50b, VTOP is set in YTOPM to determine the TCAL for the whole stroke in step 22.

In this case, the driving time is changed according to the fixed speed because the driving time is changed by the difference of the constant speed in driving other than the rated speed.

Thus, the safety device of the elevator of this embodiment is equipped with the speed setting means comprised by step 50a and step 50b which make it constant speed instead of a rated speed when traveling at a constant speed other than a rated speed.

Therefore, when the rated speed is changed and used, it can be reset to an appropriate value, an accurate full stroke travel time can be obtained, and the operating time limit can be set automatically and accurately.

[Embodiment 4]

Hereinafter, another embodiment of this invention is described with reference to drawings.

8 is a flowchart showing the operation of the present embodiment.

In addition, since FIG. 8 only changes the part enclosed by the dashed-dotted line with respect to FIG. 4, FIG. 6, and FIG. 7, it explains the changed part.

First, it is determined whether or not the flag FRUN for recognizing whether or not the vehicle has traveled in step 60 is FFH.

This is a process for recognizing the transition from the stop state to the running state and shifting to the stop state again.

If it is not recognized yet, it is determined in step 61 whether it is stopped at the terminal floor (lowest floor / top floor), and if it is stopped, OFH / FOH (lowest floor / top floor) is set at STA.

If the terminal is not stopped in step 61, the OOH is set in the STA in step 62.

Next, in step 64, the travel time counter CRUN is set to zero.

Next, in step 65, it is determined whether or not the FSET is FFH. If it is FFH, since the running time is already in the measurement completion state, in step 71, the travel time TRUN in the measurement completion state is set to the TAST in which the operation is performed.

If it is not measured in step 65, after step 21, the whole stroke traveling time is calculated | required like FIG. 4, FIG. 6, and FIG.

Here, the FSET is set to OOH at the initial setting of the RAM 8C immediately after the power is turned on, and the state is maintained once FFH.

On the other hand, when it determines with having run in step 60, the run recognition flag is set to OOH in step 66.

Next, in step 67, it is determined whether or not the terminal is stopped. If not, in step 62, the OOH is set in the STA.

If the terminal is stopped at step 67, OFH / FOH (lowest layer / top layer) is set at STP in step 68.

Next, in step 69, it is determined whether the logicalization of the STA and the STP is FFH.

In other words, it is determined whether the stop position before travel is the terminal floor (top floor / lowest floor) and the stop position after travel is the other terminal floor (bottom floor / top floor).

If it is FFH in step 69, the travel time counter GRUN measured while driving in step 70 is set to travel time TRUN, the set recognition flag FSET is set to FFH, and the travel time counter CRUN is set to zero.

Next, the travel time TRUN + 10 seconds measured in step 71 is set to the TAST in operation.

For this reason, the traveling time between the end floors is set as the travel time of the safety circuit first, and is set to the operation time limit of the safety circuit.

When it is recognized in step 20 that the vehicle is traveling, in step 72 the running recognition flag FRUN is set to FFH, and in step 73 the running time counter CRUN is incremented.

As a result, when FIG. 8 is processed for each calculation cycle, CRUN can be added to measure the running time.

Next, after step 27, abnormal detection while running is performed as shown in FIGS. 4, 6, and 7

In this way, the safety device of the elevator of the present embodiment is the travel time measuring means of step 72 and step 73, which measures the running time each time the car runs, and the step 63, step 68, and step 69 of detecting travel between the terminal floors. Step 70 and step of setting the traveling time between the end floors as the traveling time between the end floors, and the running time between the end floors with priority being set as the running time between the end floors when the traveling between the end-between running detection means and the end collision is detected. A priority operation time setting means of 71 is provided.

Therefore, according to the actual traveling time between end floors, a more accurate all-stroke running time can be obtained, and the operation time limit can be set automatically more accurately.

[Embodiment 5]

Hereinafter, another embodiment of this invention is described with reference to drawings.

9 is a flowchart showing the operation of the present embodiment.

In step 80, it is determined whether or not the FSET is FFH. If the result is FFH, the process is terminated because the traveling time between the end floors has been set.

If it is not FFH, it is determined in step 81 whether the use of the elevator is low, and if it is small, a call between both ends is generated in step 82, and the operation between the two types of end floors is performed directly.

Next, by the operation of FIG. 8 showing the fourth embodiment, the end-to-center traveling time is forcibly measured to determine the total stroke travel time, and the operation time limit is obtained. Thus, when there is little use of an elevator, it is provided with the end-to-end floor direct drive means which becomes step 81 and step 82 which drive | operates directly between end floors.

Therefore, it is possible to forcibly drive between the end floors, to obtain a more accurate all-stroke running time, and to set the operating time limit more accurately and automatically.

Although not shown, the set time limit can be reset by periodically measuring the driving time every half year.

As described above, the safety device of the elevator according to the present invention includes gunshot detection means for detecting a gunshot and outputting a position signal, counting means for counting the number of pulses generated according to the moving distance of the car, and the position signal. Level calculation means for obtaining the level position on each floor in accordance with the value of the counting means at the time of output, a floor level position and rated speed of the uppermost and lowermost layers of the level positions on the floor, and a constant determined from the rated speed An all-stroke traveling time calculating means for calculating an all-stroke traveling time from the above, an operating time setting means for setting an operating time limit according to the all-stroke running time, a car state detecting means for detecting a state in which the car cannot move, A stop signal output for outputting a stop signal for stopping the elevator when the state in which the car cannot move continues beyond the operation time limit. Since a means is provided, an accurate all-stroke run time can be obtained, and an operation time limit can be set automatically and correctly.

In addition, it is not necessary to have various readable storage means because the elevator travel time does not need to be stored in the storage means for each elevator.

In addition, when the layered level position is not obtained, an abnormal operation time setting means is set as a predetermined operation time limit. When the layered position is not yet obtained, the predetermined value is set as the operation time limit. It is possible to avoid the use of incorrect all-stroke travel time from the position of the stratified floor.

In addition, since the speed setting means is set at the constant speed instead of the rated speed when the vehicle is traveling at a constant speed other than the rated speed, when the rated speed is changed, it can be reset to an appropriate value, and the accurate all stroke travel. The time is obtained, and the operating time limit can be set automatically and accurately.

In addition, travel time measurement means for measuring a travel time for each car to travel, end-to-end travel detection means for detecting travel between end-termination layers, and when the travel between the end floors is detected, the travel time is run between the end-layers. Since a prior operation time setting means is provided in which the operation time is set as the time and the running time between the end layers is set as the operation time, the more accurate all-stroke running time is obtained and the operation time is set more accurately and automatically. There is a number.

In addition, since the end-to-end inter-floor direct driving means for driving the end-to-end straight through the operation of less elevator is provided, the end-to-end interlock can be forcibly operated, a more accurate all stroke travel time is obtained, and the operation time limit can be set automatically more accurately. There is a number.

Claims (5)

Floor detection means for detecting a floor and outputting a position signal, counting means for counting the number of pulses generated according to the moving distance of the car, and a value of the counting means when the position signal is output. A level calculation means for obtaining a level position on each floor according to the above, and an all-stroke running time which calculates the entire stroke travel time from the floor level positions and rated speeds of the top and bottom layers of the level positions on the floor and a constant determined from the rated speeds. The time calculation means, the operation time setting means for setting the operation time limit according to the previous stroke travel time, the car state detection means for detecting the state that the car cannot move, and the state where the car cannot move, Safety of the elevator, characterized in that the stop signal output means for outputting a stop signal for stopping the elevator when continuing more than one Device. The safety device of an elevator according to claim 1, further comprising an abnormal time operation time setting means that sets a predetermined operation time limit when said floor level position is not obtained. The safety device of an elevator according to claim 1 or 2, further comprising speed setting means for making said constant speed instead of said rated speed when traveling at a constant speed other than said rated speed. 2. The traveling time measuring means according to claim 1, wherein the traveling time is measured when the driving time measurement means for measuring the traveling time each time the car runs, the end-to-end floor traveling detecting means for detecting the travel between the terminal bumps, and the traveling between the terminal shocks is detected. An elevator safety time setting means for setting the travel time between the terminal bumps and invalidating the operation time and setting the travel time between the end floors to the operation time first. The safety device of an elevator according to claim 4, further comprising end to end floor direct operation means for directly running between end floors when there is little use of the elevator.