JP6299926B2 - Elevator control system - Google Patents

Description

  The present invention relates to an elevator control system.

  Patent Document 1 discloses an elevator control system. The control system includes a forced deceleration unit. The forced deceleration section causes the car to stop urgently by the brake device when the speed of the car becomes higher than the monitoring speed.

  In the control system, an inspection mode is set. In the inspection mode, it is determined whether or not the braking torque of the brake device is secured. At this time, if the braking torque does not satisfy the inspection standard, the collision speed of the car to the shock absorber may exceed the allowable speed at the time of emergency stop of the car. For this reason, the monitoring speed of the car is set to an allowable speed with respect to the collision of the car with the shock absorber.

International Publication No. 2006/103769

  However, when the car monitoring speed is set to the allowable speed for the collision of the car with the shock absorber, the traveling speed of the car needs to be lower than the allowable speed for the collision of the car with the shock absorber. For this reason, it is necessary to limit the maximum speed of the car to about half of the normal speed. As a result, the convenience of the elevator is reduced.

  The present invention has been made to solve the above-described problems. An object of the present invention is to provide an elevator control system capable of suppressing a decrease in convenience while ensuring safety even when a braking torque of a brake device is reduced.

The elevator control system according to the present invention includes a hoisting machine that drives the car and a brake device that brakes the hoisting machine, and a shock absorber provided at the end of the hoistway. In an elevator comprising: a travel distance detection unit that detects a travel distance until the car stops when the hoisting machine is braked by the brake device; and an emergency stop of the car, The monitoring distance for starting the emergency stop of the car during the operation of the elevator or the monitoring speed for starting the emergency stop of the car so that the collision speed to the shock absorber becomes an allowable speed by the travel distance detection unit an adjustment unit that detected the cage is adjusted according to the travel distance to the stop, it is higher than the Kagogadai 1 monitored velocity at the first position at the end side of the shaft When the emergency stop is started to the end side of the hoistway at 2 monitoring speeds or less, the car is urgent at the inspection speed in the state of the brake device in which the collision speed of the car with the shock absorber is less than the allowable speed. A value of a travel distance until the car stops when the car is stopped is stored as a first travel distance reference value, and the car is in a second position farther from the end of the hoistway than the first position. When the emergency stop is started to the end side of the hoistway at the second monitoring speed, the car is at the inspection speed in the state of the brake device in which the collision speed of the car to the shock absorber is equal to or lower than the allowable speed. A storage unit that stores a value of a travel distance until the car stops when an emergency stop is started, as a second travel distance reference value, and the adjustment unit causes the car to perform an emergency stop at the inspection speed. When the basket starts When the value of the travel distance until the vehicle stops is equal to or less than the first travel distance reference value, the monitoring position for starting the emergency stop of the car is the first position, and the car starts the emergency stop at the inspection speed. If the value of the travel distance until the car stops is greater than the first travel distance reference value and less than the second travel distance reference value, the monitoring position for starting the emergency stop of the car is the second position. And
The elevator control system according to the present invention includes a hoisting machine that drives the car and a brake device that brakes the hoisting machine, and a shock absorber provided at the end of the hoistway. In an elevator comprising: a travel distance detection unit that detects a travel distance until the car stops when the hoisting machine is braked by the brake device; and an emergency stop of the car, Traveling until the car stops when the travel distance detector detects the monitoring speed when starting the emergency stop of the car during operation of the elevator so that the collision speed to the shock absorber becomes an allowable speed An adjustment unit that adjusts according to the distance; and when the car starts an emergency stop toward the end of the hoistway at a third monitoring speed, the collision speed of the car to the shock absorber is less than an allowable speed. When the car starts an emergency stop at an inspection speed in the state of the brake device, a value of a travel distance until the car stops is stored as a third travel distance reference value, and the car has a third monitoring speed. When the emergency stop is started toward the end of the hoistway at a lower fourth monitoring speed, the car is in the state of the brake device in which the collision speed of the car to the shock absorber is equal to or lower than an allowable speed. A storage unit that stores a value of a travel distance until the car stops when an emergency stop is started at an inspection speed, as the fourth travel distance reference value, and the adjustment unit is configured so that the car has the inspection speed. If the value of the travel distance until the car stops when the emergency stop is started in step 3 is equal to or less than the third travel distance reference value, the monitoring speed when starting the emergency stop of the car is the third monitoring speed. The cage is at the inspection speed When the value of the travel distance until the car stops when the sudden stop is started is greater than the third travel distance reference value and less than the fourth travel distance reference value, the emergency stop of the car is started. The monitoring speed at the time is the fourth monitoring speed.

  According to these inventions, the adjusting unit adjusts the monitoring position for starting the emergency stop of the car or the monitoring speed when starting the emergency stop of the car according to the travel distance until the car stops. For this reason, it is possible to suppress a decrease in convenience while ensuring safety.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of an elevator to which an elevator control system according to a first form of the present invention is applied. It is a hardware block diagram of the control system of the elevator in Embodiment 1 of this invention. It is a figure for demonstrating the inspection method of the braking torque of the brake device by the elevator control system in Embodiment 1 of this invention. It is a figure for demonstrating the setting method of the monitoring position which starts the emergency stop of the cage | basket | car by the elevator control system in Embodiment 1 of this invention. It is a figure for demonstrating operation | movement of the adjustment part of the control system of the elevator in Embodiment 1 of this invention. It is a schematic diagram of the elevator to which the control system of the elevator in the actual form 2 of this invention is applied. It is a figure for demonstrating the setting method of the monitoring speed at the time of starting the emergency stop of the cage | basket | car by the elevator control system in Embodiment 2 of this invention. It is a figure for demonstrating operation | movement of the adjustment part of the control system of the elevator in Embodiment 2 of this invention.

  A mode for carrying out the invention will be described with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the part which is the same or it corresponds in each figure. The overlapping description of the part is appropriately simplified or omitted.

Embodiment 1 FIG.
FIG. 1 is a schematic diagram of an elevator to which the elevator control system according to the first embodiment of the present invention is applied.

  In FIG. 1, a hoistway 1 penetrates each floor of a building. The car 2 is provided inside the hoistway 1. The counterweight 3 is provided inside the hoistway 1. The hoisting machine 4 is provided in the upper part of the hoistway 1. The rope 5 is wound around the hoisting machine 4. One side of the rope 5 suspends the car 2. The other side of the rope 5 suspends the counterweight 3. The shock absorber 6 is provided at the lower end of the hoistway 1.

  The brake device 7 is provided in the hoist 4. For example, the brake device 7 includes a disc brake. For example, the brake device 7 includes a drum brake.

  The governor 8 includes a pair of sheaves 8a and a rope 8b. One of the sheaves 8a is provided in the upper part of the hoistway 1. The other of the sheaves 8 a is provided at the lower part of the hoistway 1. The rope 8b is wound around the pair of sheaves 8a. A part of the rope 8 b is connected to the lower part of the car 2. The rotation speed detector 9 is provided on one side of the sheave 8a.

  One of the first plates 10 a is provided on the upper part of the hoistway 1. The other of the first plates 10 a is provided at the lower part of the hoistway 1. One of the second plates 10b is provided in the upper part of the hoistway 1. One of the second plates 10b protrudes more toward the center in the height direction of the hoistway 1 than one of the first plates 10a. The other of the second plates 10b is provided in the lower part of the hoistway 1. The other of the second plates 10b protrudes toward the center in the height direction of the hoistway 1 than the other of the first plates 10a.

  The position detector 11 is provided on the upper portion of the car 2. For example, the position detector 11 includes a cam switch.

  The control system 12 includes a storage unit 12a, a speed detection unit 12b, a travel distance detection unit 12c, a control unit 12d, a forced deceleration unit 12e, and an adjustment unit 12f.

  The storage unit 12a stores information on the first travel distance reference value and the second travel distance reference value. The first travel distance reference value and the second travel distance reference value are values of the braking distance of the car 2. Specifically, the first travel distance reference value and the second travel distance reference value are values of travel distance until the car 2 stops when the car 2 starts an emergency stop at the inspection speed.

  The first mileage reference value is obtained when the car 2 starts an emergency stop at the terminal side of the hoistway 1 at the first position on the terminal side of the hoistway 1 at a second monitoring speed higher than the first monitoring speed. This is a value corresponding to the state of the brake device 7 in which the collision speed of the car 2 against the shock absorber 6 is equal to or lower than the allowable speed. A 1st position is a position corresponding to the edge part of the center side of the hoistway 1 in the 1st plate 10a.

  The second mileage reference value is obtained when the car 2 starts an emergency stop toward the end of the hoistway 1 at the second monitoring speed at a second position farther from the end of the hoistway 1 than the first position. This is a value corresponding to the state of the brake device 7 in which the collision speed to the shock absorber 6 is less than the allowable speed. A 2nd position is a position corresponding to the edge part of the center side of the hoistway 1 in the 2nd plate 10b.

  The input part of the speed detector 12b is connected to the output part of the rotational speed detector 9. The input unit of the travel distance detector 12 c is connected to the output unit of the rotation speed detector 9. The output unit of the control unit 12d is connected to the input unit of the hoisting machine 4 and the input unit of the brake device 7. The input part of the forced deceleration part 12e is connected to the output part of the position detector 11, the output part of the speed detection part 12b, and the output part of the travel distance detection part 12c.

  The control part 12d, the forced deceleration part 12e, and the adjustment part 12f are mutually independent. For example, the control unit 12d, the forced deceleration unit 12e, and the adjustment unit 12f are composed of mutually independent microcomputers. The control unit 12d and the forced deceleration unit 12e share elevator operation information.

  When the user gets on the car 2, the controller 12 d controls the hoisting machine 4. The hoisting machine 4 rotates by drive control by the control unit 12d. The rope 5 moves following the rotation of the hoist 4. The car 2 and the counterweight 3 move following the movement of the rope 5.

  When the car 2 approaches the destination floor, the control unit 12d drives and controls the brake device 7. The brake device 7 brakes the hoisting machine 4 by drive control by the control unit 12d. The hoisting machine 4 is held stationary on the destination floor by braking of the brake device 7. The rope 5 is stopped by the stationary holding of the hoist 4. The car 2 and the counterweight 3 are stopped when the rope 5 is stopped. The user gets off the car 2 to the destination floor.

  In the governor 8, the rope 8 b moves following the movement of the car 2. The pair of sheaves 8a rotates following the movement of the rope 8b. The rotation speed detector 9 detects one rotation speed of the sheave 8a.

  The speed detector 12b detects the speed of the car 2 based on the one rotational speed of the sheave 8a detected by the rotational speed detector 9. The travel distance detector 12 c detects the travel distance of the car 2 based on one rotational speed of the sheave 8 a detected by the rotational speed detector 9.

  The position detector 11 continuously detects the first plate 10 a at the end of the hoistway 1. The position detector 11 continuously detects the second plate 10 b at the end portion of the hoistway 1.

  The forced deceleration part 12e transmits an emergency stop command to the control part 12d when the car 2 exceeds the monitoring speed at the terminal part of the hoistway 1. The control unit 12d operates the brake device 7 based on the emergency stop command. As a result, when the car 2 collides with the shock absorber 6, the speed of the car 2 is equal to or lower than the allowable speed. For this reason, the impact of the car 2 is moderated appropriately.

  In the control system 12, an inspection mode is set. For example, the inspection mode is executed at a preset time interval. For example, the inspection mode is executed at an arbitrary time point by operating a switch or the like provided on the car 2 or the like during maintenance work or the like.

  When the braking torque of the brake device 7 decreases due to factors such as temperature, humidity, oxidation, and rust, the braking distance value when the car 2 starts an emergency stop at the inspection speed is the first mileage reference It is larger than the value and less than the second mileage reference value. In this case, the adjusting unit 12f sets the monitoring position at which the emergency stop of the car 2 is started from the position corresponding to the end of the first plate 10a on the center side of the hoistway 1 to the center side of the hoistway 1 on the second plate 10b. Switch to the position corresponding to the edge. At this time, the adjustment unit 12f transmits a command to the control unit 12d so as not to change the setting value of the maximum speed of the car 2 but to decrease the setting value of the acceleration / deceleration speed of the car 2 at the terminal part of the hoistway 1. .

  When the braking torque of the brake device 7 increases due to repair, replacement, etc. of the brake device 7, the braking distance when the car 2 makes an emergency stop at the inspection speed is equal to or less than the first travel distance reference value. In this case, the adjusting unit 12f sets the monitoring position for starting the emergency stop of the car 2 from the position corresponding to the end on the center side of the hoistway 1 in the second plate 10b to the center side of the hoistway 1 in the first plate 10a. Switch to the position corresponding to the edge. At this time, the adjusting unit 12f transmits a command to the control unit 12d so as to increase the setting value of the acceleration / deceleration of the car 2 at the terminal end of the hoistway 1 without changing the setting value of the maximum speed of the car 2. .

Next, the control part 12d, the forced deceleration part 12e, and the adjustment part 12f are demonstrated using FIG.
FIG. 2 is a hardware configuration diagram of the elevator control system according to Embodiment 1 of the present invention.

  The control unit 12d includes a first processing circuit 13a. The first processing circuit 13a includes at least one first processor 14a and at least one first memory 15a. The operation of the control unit 12d is realized when at least one first processor 14a executes a program stored in at least one first memory 15a.

  The forced deceleration unit 12e includes a second processing circuit 13b. The second processing circuit 13b includes at least one second processor 14b and at least one second memory 15b. The operation of the forced deceleration unit 12e is realized by at least one second processor 14b executing a program stored in at least one second memory 15b.

  The adjustment unit 12f includes a third processing circuit 13c. The third processing circuit 13c includes at least one third processor 14c, at least one third memory, and 15c. The operation of the adjustment unit 12f is realized by at least one third processor 14c executing a program stored in at least one third memory 15c.

Next, a method for inspecting the braking torque of the brake device 7 will be described with reference to FIG.
FIG. 3 is a diagram for explaining a method for inspecting the braking torque of the brake device by the elevator control system according to the first embodiment of the present invention. The horizontal axis in FIG. 3 is the speed of the car 2. The vertical axis in FIG. 3 is the position of the car 2.

  In the inspection mode, the control unit 12d sets the speed of 1 of the car 2 to the inspection speed. The forced deceleration unit 12e causes the control unit 12d to start an emergency stop of the car 2 when the speed detection unit 12b detects that the speed of the car 2 has reached the inspection speed. The travel distance detection unit 12 c detects the braking distance of the car 2. Specifically, the travel distance detection unit 12c detects the distance traveled by the car 2 from when the car 2 starts an emergency stop until the speed of the car 2 becomes zero. The forced deceleration unit 12e transmits information on the braking distance of the car 2 to the adjustment unit 12f.

Next, a monitoring position setting method for starting the emergency stop of the car 2 will be described with reference to FIG.
FIG. 4 is a diagram for explaining a monitoring position setting method for starting an emergency stop of a car by the elevator control system according to Embodiment 1 of the present invention. The horizontal axis in FIG. 4 is the speed of the car 2 and the monitoring speed. The vertical axis in FIG. 4 is the position of the car 2. In FIG. 4, the speed of the car 2 is represented by a thin line. The monitoring speed of the car 2 is represented by a thick line.

  When the value of the braking distance of the car 2 is greater than the first travel distance reference value and less than or equal to the second travel distance reference value, the adjusting unit 12f moves the monitoring position at which the emergency stop of the car 2 is started up and down on the second plate 10b. Set to a position corresponding to the end of the center of the road 1. As a result, the first monitoring speed is set up to the position of the second plate 10b as shown by the thick dotted line in FIG.

  At this time, the adjustment unit 12f transmits a command to the control unit 12d so as not to change the setting value of the maximum speed of the car 2 but to decrease the setting value of the acceleration / deceleration speed of the car 2 at the terminal part of the hoistway 1. . As a result, as shown in FIG. 4, the acceleration / deceleration of the car 2 at the terminal portion of the hoistway 1 is changed from the value indicated by the solid line to the value indicated by the dotted line. The value of the speed of the car 2 is smaller than the value of the first monitoring speed indicated by the thick dotted line.

  When the value of the braking distance of the car 2 is greater than the first travel distance reference value and less than or equal to the second travel distance reference value, the car 2 corresponds to the center side end of the hoistway 1 in the second plate 10b. Emergency stop is started at As a result, the collision speed of the car 2 to the shock absorber 6 is less than the allowable speed.

  When the value of the braking distance of the car 2 is equal to or less than the first travel distance reference value, the adjusting unit 12f corresponds to the monitoring position at which the emergency stop of the car 2 is started at the end on the center side of the hoistway 1 in the first plate 10a. Set to the specified position.

  At this time, the adjusting unit 12f transmits a command to the control unit 12d so as to increase the setting value of the acceleration / deceleration of the car 2 at the terminal end of the hoistway 1 without changing the setting value of the maximum speed of the car 2. . As a result, as shown in FIG. 4, the acceleration / deceleration of the car 2 at the terminal portion of the hoistway 1 is changed from the value indicated by the dotted line to the value indicated by the solid line. The value of the speed of the car 2 is smaller than the value of the first monitoring speed indicated by the thick dotted line.

  When the value of the travel distance until the car 2 stops is equal to or less than the first travel distance reference value, the car 2 starts an emergency stop at a position corresponding to the central end of the hoistway 1 in the first plate 10a. . As a result, the collision speed of the car 2 to the shock absorber 6 is less than the allowable speed.

Next, the operation of the adjustment unit 12f will be described with reference to FIG.
FIG. 5 is a diagram for explaining the operation of the adjusting unit of the elevator control system according to Embodiment 1 of the present invention.

  In step S1, the adjustment unit 12f determines whether or not the value of the braking distance when the car 2 makes an emergency stop at the inspection speed is equal to or less than the first travel distance reference value.

  If the value of the braking distance when the car 2 is urgently stopped at the inspection speed in step S1, the process proceeds to step S2. In step S2, the adjustment unit 12f sets the monitoring position at which the emergency stop of the car 2 is started to a position corresponding to the central end of the hoistway 1 in the first plate 10a. As a result, the forced deceleration unit 12e monitors the position of the car 2 using the first plate 10a.

  If the value of the braking distance when the car 2 makes an emergency stop at the inspection speed in step S1 is not less than or equal to the first travel distance reference value, the process proceeds to step S3. In step S3, the adjustment unit 12f determines whether or not the value of the braking distance when the car 2 is urgently stopped at the inspection speed is greater than the first travel distance reference value and less than or equal to the second travel distance reference value.

  If the value of the braking distance when the car 2 makes an emergency stop at the inspection speed in step S3 is greater than the first travel distance reference value and less than or equal to the second travel distance reference value, the process proceeds to step S4. In step S4, the adjusting unit 12f sets the monitoring position at which the emergency stop of the car 2 is started to a position corresponding to the central end of the hoistway 1 in the second plate 10b. As a result, the forced deceleration unit 12e monitors the position of the car 2 using the second plate 10b.

  When the value of the braking distance when the car 2 is urgently stopped at the inspection speed in step S3 is larger than the second mileage reference value, the position corresponding to the center side end of the hoistway 1 in the second plate 10b. Even if the emergency stop of the car 2 is started, the collision speed of the car 2 to the shock absorber 6 may be higher than the allowable speed. In this case, the process proceeds to step S5. In step S <b> 5, the adjusting unit 12 f sets the monitoring speed to an allowable speed for the collision with the shock absorber 6 regardless of the position of the car 2. At this time, the operation of the elevator may be stopped.

  According to Embodiment 1 demonstrated above, the adjustment part 12f adjusts the monitoring position which starts the emergency stop of the car 2 according to the braking distance of the car 2. FIG. For this reason, it is possible to suppress a decrease in convenience while ensuring safety.

  Further, when the braking distance of the car 2 becomes longer than that at the previous detection, the set value of the maximum speed of the car 2 is not changed. The monitoring position for starting the emergency stop of the car 2 is set at a position farther from the terminal end of the hoistway 1 than the previous setting. The set value of the acceleration / deceleration of the car 2 at the terminal portion of the hoistway 1 is smaller than the previous set value. For this reason, the car 2 can travel at the maximum speed. As a result, an increase in the traveling time of the car 2 can be suppressed.

  Further, when the braking distance of the car 2 becomes shorter than that at the previous detection, the set value of the maximum speed of the car 2 is not changed. The monitoring position for starting the emergency stop of the car 2 is set at a position closer to the end of the hoistway 1 than the previous setting. The set value of the acceleration / deceleration of the car 2 at the end portion of the hoistway 1 is larger than the previous set value. For this reason, the traveling time of the car 2 can be shortened.

  Further, by using the first travel distance reference value and the second travel distance reference value, it is possible to set a monitoring position at which the emergency stop of the car 2 is started at an arbitrary time. For this reason, it is possible to appropriately set the monitoring position at which the emergency stop of the car 2 is started when a decrease in the braking torque of the brake device 7 is suspected.

  Further, the inspection of the braking torque of the brake device 7 is performed at a preset time interval. For this reason, even when the emergency stop of the car 2 does not occur during normal operation, it is possible to detect a decrease in the braking torque of the brake device 7.

  The forced deceleration unit 12e and the like may not be a microcomputer. For example, the detection of the end portion of the hoistway 1, the detection that the speed of the car 2 exceeds the monitoring speed, and the control of the operation of the brake device 7 may be controlled by a plurality of relays. Also in this case, it is possible to suppress a decrease in convenience while ensuring safety.

  Moreover, you may include the adjustment part 12f in the forced deceleration part 12e. Also in this case, it is possible to suppress a decrease in convenience while ensuring safety.

  Further, when the first plate 10a or the second plate 10b is discretely arranged at a preset position for the convenience of equipment arrangement inside the hoistway 1, regarding the first plate 10a and the second plate 10b, What is necessary is just to detect that the cage | basket | car 2 is arrange | positioned between the buffer 6 from the position set beforehand also using the information of the speed detection part 12b and the travel distance detection part 12c. Also in this case, it is possible to suppress a decrease in convenience while ensuring safety.

  Further, a cam rail may be provided in the hoistway 1 instead of the first plate 10a. In this case, the car 2 may be provided with a switch. The switch continuously detects the cam rail by being pushed by the cam rail at the end of the hoistway 1. Also in this case, the adjustment unit 12f adjusts the monitoring position where the emergency stop of the car 2 is started according to the braking distance of the car 2. For this reason, it is possible to suppress a decrease in convenience while ensuring safety.

Embodiment 2. FIG.
FIG. 6 is a schematic diagram of an elevator to which the elevator control system according to the second embodiment of the present invention is applied. In addition, the same code | symbol is attached | subjected to the same part as Embodiment 1, or an equivalent part. The description of this part is omitted.

  In FIG. 6, the third plate 10 c is provided below the hoistway 1.

  The control system 12 also includes a position detection unit 12g. The input part of the position detector 12g is connected to the output part of the rotational speed detector 9 and the output part of the position detector 11. The output part of the position detection part 12g is connected to the input part of the forced deceleration part 12e. For example, the position detector 12g stores in advance information on the installation position of the third plate 10c. For example, the position detection unit 12g stores the installation position of the third plate 10c by learning. The position detector 12g corrects the recognition of the position of the car 2 to the stored set position of the third plate 10c when the position detector 11 detects the third plate 10c.

  The storage unit 12a stores a third travel distance reference value and a fourth travel distance reference value. The third travel distance reference value and the fourth travel distance reference value are values of the braking distance of the car 2. Specifically, the third travel distance reference value and the fourth travel distance reference value are values of travel distances until the car 2 stops when the car 2 starts an emergency stop at the inspection speed.

  The third mileage reference value is a brake device in which when the car 2 starts an emergency stop at the third monitoring speed toward the end of the hoistway 1, the collision speed of the car 2 against the shock absorber 6 is less than the allowable speed. The value corresponds to the state of 7. The fourth mileage reference value allows the collision speed of the car 2 to the shock absorber 6 when the car 2 starts an emergency stop toward the terminal side of the hoistway 1 at a fourth monitoring speed lower than the third monitoring speed. It is a value corresponding to the state of the brake device 7 that is below the speed.

  In the control system 12, an inspection mode is set. The inspection mode is executed at a preset time interval.

  When the braking torque of the brake device 7 decreases due to factors such as temperature, humidity, oxidation, and rust, the braking distance when the car 2 starts an emergency stop at the inspection speed is the third mileage reference value. Greater than the fourth mileage reference value. In this case, the adjustment unit 12f switches the monitoring speed at the time of starting the emergency stop of the car 2 from the third monitoring speed to the fourth monitoring speed. At this time, the adjusting unit 12f transmits a command to the control unit 12d so as not to change the maximum speed of the car 2 but to decrease the set value of the acceleration / deceleration of the car 2 at the terminal end of the hoistway 1.

  When the braking torque of the brake device 7 increases due to repair, replacement, etc. of the brake device 7, the value of the braking distance when the car 2 starts an emergency stop at the inspection speed becomes equal to or less than the third travel distance reference value. In this case, the adjustment unit 12f switches the monitoring speed at the time of starting the emergency stop of the car 2 from the fourth monitoring speed to the third monitoring speed. At this time, the adjustment unit 12f transmits a command to the control unit 12d so as to increase the set value of the acceleration / deceleration of the car 2 at the terminal part of the hoistway 1 without changing the maximum speed of the car 2.

Next, a method for setting the monitoring speed when the emergency stop of the car 2 is started will be described with reference to FIG.
FIG. 7 is a diagram for explaining a monitoring speed setting method when an emergency stop of a car is started by the elevator control system according to the second embodiment of the present invention. The horizontal axis in FIG. 7 represents the speed of the car 2 and the monitoring speed. The vertical axis in FIG. 7 is the position of the car 2. In FIG. 7, the speed of the car 2 is represented by a thin line. The monitoring speed of the car 2 is represented by a thick line.

  When the value of the braking distance of the car 2 is larger than the third traveling distance reference value and equal to or smaller than the fourth traveling distance reference value, the adjusting unit 12f sets the monitoring speed when the emergency stop of the car 2 is started to the fourth monitoring speed. Set to. As a result, the value of the monitoring speed at the time of starting the emergency stop of the car 2 is changed from the value shown by the thick solid line to the value shown by the thick dotted line as shown in FIG.

  At this time, the adjusting unit 12f transmits a command to the control unit 12d so as to decrease the setting value of the acceleration / deceleration of the car 2 at the terminal end of the hoistway 1 without changing the setting value of the maximum speed of the car 2. To do. As a result, as shown in FIG. 7, the speed value of the car 2 is smaller than the value of the fourth monitoring speed.

  When the value of the braking distance of the car 2 is greater than the third travel distance reference value and less than or equal to the fourth travel distance reference value, the car 2 starts an emergency stop at or below the fourth monitoring speed. As a result, the collision speed of the car 2 to the shock absorber 6 is less than the allowable speed.

  When the value of the braking distance of the car 2 is equal to or less than the third travel distance reference value, the adjustment unit 12f sets the monitoring speed when the emergency stop of the car 2 is started to the third speed. As a result, the value of the monitoring speed when starting the emergency stop of the car 2 is changed from the value indicated by the thick dotted line to the value indicated by the thick solid line as shown in FIG.

  At this time, the adjusting unit 12f transmits a command to the control unit 12d so as to increase the set value of the acceleration / deceleration of the car 2 at the terminal end of the hoistway 1 without changing the set value of the maximum speed of the car 2. To do. As a result, as shown in FIG. 7, the speed value of the car 2 is smaller than the value of the third monitoring speed.

  When the value of the braking distance of the car 2 is equal to or smaller than the third travel distance reference value, the car 2 starts an emergency stop at a speed equal to or lower than the third monitoring speed. As a result, the collision speed of the car 2 to the shock absorber 6 is less than the allowable speed.

Next, the operation of the adjustment unit 12f will be described with reference to FIG.
FIG. 8 is a diagram for explaining the operation of the adjusting portion of the elevator control system according to Embodiment 2 of the present invention.

  In step S11, the adjusting unit 12f determines whether or not the value of the braking distance when the car 2 makes an emergency stop at the inspection speed is equal to or less than the third travel distance reference value.

  If the value of the braking distance when the car 2 makes an emergency stop at the inspection speed in step S11 is less than or equal to the third travel distance reference value, the process proceeds to step S12. In step S12, the adjustment unit 12f sets the monitoring speed at the time of starting the emergency stop of the car 2 to the third monitoring speed.

  If the value of the braking distance when the car 2 makes an emergency stop at the inspection speed in step S11 is not less than or equal to the third travel distance reference value, the process proceeds to step S13. In step S13, the adjusting unit 12f determines whether or not the value of the braking distance when the car 2 makes an emergency stop at the inspection speed is greater than the third travel distance reference value and less than or equal to the fourth travel distance reference value.

  If the value of the braking distance when the car 2 makes an emergency stop at the inspection speed in step S13 is greater than the third travel distance reference value and less than or equal to the fourth travel distance reference value, the process proceeds to step S14. In step S14, the adjustment unit 12f sets the monitoring speed at the time of starting the emergency stop of the car 2 to the fourth monitoring speed.

  If the value of the braking distance when the car 2 is urgently stopped at the inspection speed in step S13 is larger than the fourth mileage reference value, the car 2 starts to be urgently stopped when the speed of the car 2 is the fourth monitoring speed. Even so, the collision speed of the car 2 to the shock absorber 6 may be higher than the allowable speed. In this case, the process proceeds to step S15. In step S <b> 15, the adjusting unit 12 f sets the monitoring speed of the car 2 to an allowable speed for the collision of the car 2 with the shock absorber 6 regardless of the position of the car 2. At this time, the operation of the elevator may be stopped.

  According to Embodiment 2 demonstrated above, the adjustment part 12f adjusts the monitoring speed at the time of starting the emergency stop of the car 2 according to the braking distance of the car 2. FIG. For this reason, it is possible to suppress a decrease in convenience while ensuring safety.

  Further, when the braking distance of the car 2 becomes longer than that at the previous detection, the set value of the maximum speed of the car 2 is not changed. The set value of the monitoring speed when the car 2 at the terminal portion of the hoistway 1 is stopped urgently becomes smaller than the previous set value. The set value of the acceleration / deceleration of the car 2 is smaller than the previous set value. For this reason, the car 2 can travel at the maximum speed. As a result, an increase in the traveling time of the car 2 can be suppressed.

  Further, when the braking distance of the car 2 becomes shorter than the previous detection time, the set value of the maximum speed of the car 2 is not changed. The set value of the monitoring speed when the car 2 at the terminal part of the hoistway 1 is stopped urgently becomes larger than the previous set value. The set value of the acceleration / deceleration of the car 2 is larger than the previous set value. For this reason, the traveling time of the car 2 can be shortened.

  Further, if the third mileage reference value and the fourth mileage reference value are used, it is possible to set the monitoring speed at the time of starting the emergency stop of the car 2 at an arbitrary time. For this reason, it is possible to appropriately set the monitoring position at which the emergency stop of the car 2 is started when a decrease in the braking torque of the brake device 7 is suspected.

  Further, the inspection of the braking torque of the brake device 7 is performed at a preset time interval. For this reason, even when the emergency stop of the car 2 does not occur during normal operation, it is possible to detect a decrease in the braking torque of the brake device 7.

  In the first embodiment and the second embodiment, a decrease in the braking torque of the brake device 7 may be estimated from the measurement result of the temperature sensor or the humidity sensor. In this case, safety can be ensured even if the braking torque is not inspected at preset time intervals. For example, if the monitoring speed is increased when the humidity value exceeds a preset value, a decrease in convenience can be suppressed while ensuring safety.

  As described above, the elevator control system according to the present invention can be used for a system that suppresses a decrease in convenience while ensuring safety.

1 hoistway, 2 cage, 3 counterweight, 4 hoisting machine, 5 rope, 6 shock absorber, 7 brake device, 8 speed governor, 8a sheave, 8b rope, 9 speed detector, 10a first plate, 10b 2nd plate, 10c 3rd plate, 11 position detector, 12 control system, 12a storage unit, 12b speed detection unit, 12c travel distance detection unit, 12d control unit, 12e forced deceleration unit, 12f
Adjustment unit, 12g position detection unit, 13a first processing circuit, 13b second processing circuit,
13c third processing circuit, 14a first processor, 14b second processor, 14c third processor, 15a first memory, 15b second memory, 15c third memory

Claims (8)

An elevator comprising a hoisting machine for driving the car, a brake device for braking the hoisting machine, and a shock absorber provided at a terminal portion of the hoistway, the car being provided inside the hoistway. A travel distance detection unit that detects a travel distance until the car stops when the hoisting machine is braked by
By the traveling distance detection unit monitoring position location to initiate an emergency stop of the car at the time of operation of the elevator so that the collision speed is the allowable speed for the buffer of the cage when the emergency stopping the car An adjustment unit that adjusts according to the travel distance until the detected car stops;
When the car starts an emergency stop to the terminal side of the hoistway at a first position on the terminal side of the hoistway at a second monitoring speed higher than the first monitoring speed, In the state of the brake device in which the collision speed is equal to or lower than the allowable speed, a value of a travel distance until the car stops when the car starts an emergency stop at an inspection speed is stored as a first travel distance reference value; When the car starts an emergency stop toward the end of the hoistway at the second monitoring speed at a second position farther from the end of the hoistway than the first position, The value of the travel distance until the car stops when the car starts an emergency stop at the inspection speed in the state of the brake device where the collision speed is equal to or lower than the allowable speed is stored as the second travel distance reference value. A storage unit;
Equipped with a,
The adjustment unit starts an emergency stop of the car when a value of a travel distance until the car stops when the car starts an emergency stop at the inspection speed is equal to or less than the first travel distance reference value. The monitoring position to be operated is a first position, and when the car starts an emergency stop at the inspection speed, a value of a travel distance until the car stops is larger than the first travel distance reference value and the second travel When the distance is equal to or less than the reference distance, the elevator control system has the second monitoring position for starting the emergency stop of the car . The adjustment unit adjusts the acceleration / deceleration of the car at the terminal end according to a travel distance until the car stops, and when the travel distance value is equal to or less than the first travel distance reference value, The acceleration / deceleration of the car at the end portion is set to be higher than the normal when the value of the travel distance is larger than the first travel distance reference value and less than or equal to the second travel distance reference value. The elevator control system according to claim 1. 3. The elevator control system according to claim 1, wherein the adjusting unit adjusts a monitoring position at which the emergency stop of the car is started at a preset time interval. The elevator control system according to any one of claims 1 to 3, wherein the adjustment unit estimates a decrease in braking torque of the brake device based on a measurement result of a temperature sensor or a humidity sensor. An elevator comprising a hoisting machine for driving the car, a brake device for braking the hoisting machine, and a shock absorber provided at a terminal portion of the hoistway, the car being provided inside the hoistway. A travel distance detection unit that detects a travel distance until the car stops when the hoisting machine is braked by
The monitoring distance when the emergency stop of the car is started during the operation of the elevator so that the collision speed of the car with the shock absorber becomes an allowable speed when the car is emergency stopped. An adjustment unit that adjusts according to the travel distance until the car detected by
When the car starts an emergency stop toward the end of the hoistway at a third monitoring speed, the car is inspected in a state of the brake device in which the collision speed of the car with the shock absorber is equal to or lower than an allowable speed. When the emergency stop is started at a speed, a value of a travel distance until the car stops is stored as a third travel distance reference value, and the car has a fourth monitoring speed that is lower than the third monitoring speed. When the car starts an emergency stop at the inspection speed in the state of the brake device in which the collision speed of the car to the shock absorber is equal to or lower than an allowable speed when an emergency stop is started toward the end side, the car A storage unit that stores a value of a travel distance until the vehicle stops as a fourth travel distance reference value ;
With
The adjustment unit starts an emergency stop of the car when a value of a travel distance until the car stops when the car starts an emergency stop at the inspection speed is equal to or less than the third travel distance reference value. The monitoring speed at the time of carrying out is set as the third monitoring speed, and when the car starts an emergency stop at the inspection speed, the value of the travel distance until the car stops is larger than the third travel distance reference value and for following the fourth traveling distance reference value, a fourth control system monitoring the speed and to Rue elevators the monitored velocity at the start of an emergency stop of the car. The adjustment unit adjusts the acceleration / deceleration of the car at the terminal end according to a travel distance until the car stops. When the travel distance value is equal to or less than the third travel distance reference value, the car When the acceleration / deceleration speed of the car is set as usual, and the value of the travel distance is larger than the third travel distance reference value and equal to or less than the fourth travel distance reference value, the acceleration / deceleration of the car at the end portion is set higher than the normal speed. The elevator control system according to claim 5, which is also lowered. The adjustment unit, the elevator control system according to claim 5 or claim 6 adjusted at preset time intervals the monitored velocity at the time of starting an emergency stop before Symbol cage. The elevator control system according to any one of claims 5 to 7 , wherein the adjustment unit estimates a decrease in braking torque of the brake device based on a measurement result of a temperature sensor or a humidity sensor.

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