JP2009215057A - Compulsory deceleration control system of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve safety and reliability of an elevator system by always securing high control accuracy even when a car travels in any area. <P>SOLUTION: A car speed calculation means 6 calculates a speed of a car 3 based on physical data input from a car speed calculating physical data detection means 11, and outputs it to an overspeed judgment means 8. The overspeed judgment means 8 compares a speed calculation value input from the car speed calculation means 6 with a threshold input from threshold output means 7, and outputs a judgment result that the car 3 is under an overspeed condition to a compulsory deceleration control means 9 when the speed calculation value exceeds the threshold. The compulsory deceleration control means 9 executes the compulsory deceleration control to a hoisting machine 1 immediately after receiving the judgment result. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an elevator forced deceleration control system.

  If the car that is traveling toward the final floor does not decelerate sufficiently even when it enters the area close to the final floor (referred to as “the final floor deceleration area” in this specification), the car is located above the hoistway. Alternatively, forced deceleration control is performed to avoid colliding with the lower part.

For example, in the system according to Patent Document 1, a plurality of limit switches for detecting car passing are provided in the terminal floor deceleration area, and the car speed at the time when each limit switch detects car passing is less than the threshold value. If it is higher, a technique for forcibly decelerating and controlling the car is disclosed.
JP 2003-95555 A

  Incidentally, the speed detection of the car during the elevator operation is usually performed by using a speed detector such as a pulse generator or a resolver attached to the hoisting machine.

  However, abnormalities that cause the speed of the car to become overspeed often occur due to a failure of the speed detector or the like (including a failure such as an error expansion due to aging deterioration). Even if a speed abnormality due to such a failure of the speed detector occurs in the vicinity of the terminal floor, in the terminal floor deceleration area, the speed abnormality is reliably detected based on the function of the limit switch described above and forcibly decelerated. Can do. Further, when such a speed abnormality occurs during traveling on the intermediate floor, the car can be emergency stopped by the governor.

  However, in the system according to Patent Document 1, the forced deceleration control is performed on the terminal floor only when the traveling direction of the car is from the intermediate floor to the terminal floor, and the direction from the terminal floor to the intermediate floor. In this case, forced deceleration control is not performed.

  In addition, when a speed abnormality occurs during traveling on the intermediate floor, emergency stop control by the governor is performed as described above. This emergency stop control by the governor is performed using centrifugal force. Therefore, control accuracy as high as the terminal floor forced deceleration control cannot be expected.

  In order to improve the safety and reliability of the system, whether the car is traveling from the terminal floor to the intermediate floor or traveling on the intermediate floor, It is desirable to ensure control accuracy equivalent to deceleration control.

  The present invention has been made in view of the above circumstances, and it is possible to always ensure high control accuracy even when the car is traveling in any region, and improve the safety and reliability of the elevator system. It is an object of the present invention to provide a forced deceleration control system for an elevator.

  In order to solve the above problems, the present invention provides a hoisting machine for driving a car, a car speed detector attached to the hoisting machine for detecting the speed of the car, and calculating the speed of the car. The physical data detected by the car speed calculation physical data detection means and the car speed calculation physical data detection means excluding at least the speed detector attached to the hoisting machine. Based on the comparison between the car speed calculation means for calculating the car speed based on the above, the threshold output means for outputting a preset threshold value, the car speed calculation value from the car acceleration calculation means, and the threshold value from the threshold output means When the vehicle is in an overspeed state, the overspeed determination means for determining whether the car is in an overspeed state, and when the overspeed determination means is determined to be in an overspeed state, the hoisting machine is forcibly decelerated and controlled. A forced deceleration control means, characterized by comprising a.

  ADVANTAGE OF THE INVENTION According to this invention, even if it is a case where a car is drive | working in any area | region, it can always ensure a high control accuracy and can improve the safety | security and reliability of an elevator system.

  FIG. 1 is a configuration diagram of an elevator forced deceleration control system according to a first embodiment of the present invention. This first embodiment is a basic embodiment of the present invention.

  A hoisting machine 1 is installed at the upper part of the hoistway, and a rope 2 is wound around the hoisting machine 1. A car 3 and a counterweight 4 are respectively attached to one end side and the other end side of the rope 2, and these car 3 and counterweight 4 are driven in the hoistway in opposite directions by driving the hoist 1. It is designed to move up and down.

  The hoisting machine 1 is driven and controlled by an elevator control device 5. The elevator control device 5 includes a car speed calculation means 6, a threshold setting device 7, an overspeed determination means 8, and a forced deceleration control means 9. The car speed calculation means 6 is input with physical data detected by the car speed calculation physical data detection means 11.

  The configuration of the elevator control device 5 in FIG. 1 only shows components related to forced deceleration control, and the speed control during normal operation is performed by a car speed detector (not shown) attached to the hoisting machine 1. The operation control means (not shown) is configured so that the detected value from the above and the preset value of the speed control pattern are the same.

  In the present embodiment, the car speed calculation physical data detection means 11 uses at least detection means other than the car speed detector attached to the hoisting machine 1. The physical data detected by the car speed calculation physical data detection means 11 can be a basis for the speed calculation of the car 3.

  Next, the operation of FIG. 1 will be described. For example, it is assumed that the car 3 is currently traveling in a certain area from the departure floor toward the destination floor. The car speed calculation physical data detection means 11 detects predetermined physical data that can be the basis of the speed calculation of the car 3, and outputs this to the car speed calculation means 6. The car speed calculation means 6 calculates the speed of the car 3 based on the input physical data and outputs this to the overspeed determination means 8. At this time, a preset fixed threshold value is inputted from the threshold value output means 7 to the overspeed determination means 8.

  The overspeed determination means 8 compares the speed calculation value input from the car speed calculation means 6 with the threshold value input from the threshold output means 7, and if the speed calculation value exceeds the threshold, the car 3 exceeds the speed. A determination result indicating that it is in a state is output to the forced deceleration control means 9. And the forced deceleration control means 9 will perform the forced deceleration control with respect to the winding machine 1 immediately, if this determination result is received.

  The forced deceleration control for the hoisting machine 1 by the forced deceleration control means 9 is executed regardless of whether the car 3 is traveling on the final floor or traveling on the intermediate floor. Further, when the terminal floor is traveling, the forced deceleration control is performed not only when the car 3 is traveling from the intermediate floor toward the terminal floor but also when the car 3 is traveling from the terminal floor toward the intermediate floor. Executed. The determination of the excess of speed at this time is made based on detection of predetermined physical data without using the car speed detector attached to the hoisting machine 1. Therefore, according to the configuration of FIG. 1, high control accuracy can always be ensured regardless of which area the car 3 is traveling, and the safety and reliability of the elevator system can be improved.

  In addition, although the forced deceleration control in this invention assumes performing by the torque control of the winding machine 1 via an inverter apparatus (not shown), it can also be performed by a mechanical brake, or further, You may make it carry out by using together torque control and a mechanical brake.

  FIG. 2 is a configuration diagram of an elevator forced deceleration control system according to the second embodiment of the present invention. FIG. 2 differs from FIG. 1 in that the elevator control device 5A has a travel region / travel direction specifying means 10 which is a car speed calculation physical data detection means 11. The travel area and the travel direction are specified based on the detected physical data.

  As already described in the first embodiment, the car speed computation physical data detection means 11 can detect the basis of the speed computation of the car 3. If the speed of the car 3 can be obtained, for example, the car position can be obtained by integrating the speed, and the acceleration can be obtained by differentiating the speed. Therefore, the travel region and the travel direction can be specified from the information on the car position and the acceleration change.

  Here, the specification of the travel area is basically to specify whether it is the terminal floor deceleration area or the other intermediate floor travel area. Good. The specification of the traveling direction is to specify whether the traveling direction is the ascending direction or the descending direction.

  The threshold value output means 7 holds threshold value data divided into a plurality of levels in advance in the internal memory, and the threshold value corresponding to the information related to the travel area and the travel direction input from the travel area / travel direction specifying means 10 is set. It selects and outputs to the overspeed determination means 8.

  For example, when the traveling area is the terminal floor deceleration area or an area very close to this area, and the traveling direction is the direction from the intermediate floor to the terminal floor, the threshold output means 7 outputs the lowest level threshold. It is like that. On the other hand, even if the traveling area is the terminal floor deceleration area or an area very close to this area, if the traveling direction is the direction from the terminal floor toward the intermediate floor, the threshold output means 7 is less than the lowest level. Output a slightly higher threshold. Further, when the traveling area is the intermediate floor traveling area, a higher threshold value is output regardless of the traveling direction.

  Next, the operation of FIG. 2 will be described. For example, it is assumed that the car 3 is currently traveling in a certain area from the departure floor toward the destination floor. The car speed calculation physical data detection means 11 detects predetermined physical data that can be the basis of the speed calculation of the car 3, and outputs this to the car speed calculation means 6. The car speed calculation means 6 calculates the speed of the car 3 based on the input physical data and outputs this to the overspeed determination means 8.

  On the other hand, the travel area / travel direction specifying means 10 also receives the physical data from the car speed calculation physical data detection means 11. Then, the car speed is calculated from the input physical data, the travel region and the travel direction are specified based on the calculated speed, and the specified result is output to the threshold output means 7.

  The threshold output means 7 holds appropriate threshold data for each combination of the travel area and the travel direction in the internal memory in a table format, and corresponds to the travel area and the travel direction specified by the travel area / travel direction specifying means 10. The threshold to be picked up is picked up from the table of the internal memory and output to the overspeed determination means 8.

  Thereafter, in the same manner as in the first embodiment, the speed excess determination means 8 compares the speed calculation value input from the car speed calculation means 6 with the threshold value input from the threshold output means 7, and the speed calculation value is the threshold value. Is exceeded, a determination result indicating that the car 3 is in an overspeed state is output to the forced deceleration control means 9. And the forced deceleration control means 9 will perform the forced deceleration control with respect to the winding machine 1 immediately, if this determination result is received.

  According to the second embodiment, the threshold output means 7 outputs an appropriate threshold value to the overspeed determination means 8 according to the travel area and the travel direction of the car 3, and the overspeed determination means 8 uses this threshold value. Therefore, it is possible to ensure a higher control accuracy and further improve the safety and reliability of the elevator system.

  In the configuration of FIG. 2, the travel region / travel direction specifying unit 10 specifies the travel region and the travel direction based on the physical data from the car speed calculation physical data detection unit 11. A plurality of sensors such as limit switches may be provided at locations, and the travel region and the travel direction may be specified by the time when the car 3 passes these sensors and the order of passage.

  FIG. 3 is a configuration diagram of an elevator forced deceleration control system according to a third embodiment of the present invention. In the present embodiment, a car acceleration detecting means 11A provided in the car 3 is used as the car speed calculating physical data detecting means 11 in FIG.

  When the car speed calculation means 6 receives an acceleration detection signal as physical data from the car acceleration detection means 11A, the car speed calculation means 6 calculates the car speed by, for example, integrating the acceleration detection value, and determines this calculated value as an overspeed determination. Output to means 8. Other configurations and operations are substantially the same as the configuration of FIG.

  Although not shown, the travel region / travel direction specifying means 10 shown in FIG. 2 is attached, and the travel region / travel direction specifying means 10 is caused to input an acceleration detection signal from the car acceleration detection means 11A. In this way, as with the configuration of FIG. 2, high control accuracy can be ensured, and the safety and reliability of the elevator system can be further improved.

  FIG. 4 is a configuration diagram of an elevator forced deceleration control system according to a fourth embodiment of the present invention. The present embodiment uses a car load detecting means 11B provided in the car 3 as the car speed calculating physical data detecting means 11 in FIG. 1, and the car speed calculating means 6 has a car acceleration calculating section 6a. It is a thing.

  When the car speed calculation means 6 inputs a car load detection signal as physical data from the car load detection means 11B, the car acceleration calculation section 6a calculates the car acceleration from the load detection value, and further, the car speed from this car acceleration. Is calculated. Then, the calculated value of the car speed is output to the overspeed determination means 8. Other configurations and operations are substantially the same as the configuration of FIG.

  Although not shown, the traveling region / traveling direction specifying means 10 shown in FIG. 2 is added, and the traveling load / traveling direction specifying means 10 inputs a car load detection signal from the car load detecting means 11B. By doing so, like the configuration of FIG. 2, high control accuracy can be ensured, and the safety and reliability of the elevator system can be further improved.

  FIG. 5 is a configuration diagram of an elevator forced deceleration control system according to a fifth embodiment of the present invention. In the present embodiment, as the car speed calculation physical data detection means 11 in FIG. 1, the hoisting machine current detection means 11C for detecting the current of the hoisting machine 1 is used, and the car speed calculation means 6 uses the frequency calculation unit 6b. It is set as the structure which has. The hoisting machine current detection means 11C is provided, for example, in a power supply path from the inverter device (not shown) to the hoisting machine 1.

  Then, when the car speed calculation means 6 inputs the hoisting machine current as physical data from the hoisting machine current detection means 11C, the frequency calculation part 6b calculates the current frequency from the detected current value, and further, from this current frequency, the car is calculated. Calculate the speed. Then, the calculated value of the car speed is output to the overspeed determination means 8. Other configurations and operations are substantially the same as the configuration of FIG.

  Although not shown, the travel region / travel direction specifying means 10 shown in FIG. 2 is provided, and a current detection signal from the hoisting machine current detection means 11C is input to the travel region / travel direction specifying means 10. If it is made to do, like the structure of FIG. 2, high control accuracy can be ensured and the safety | security and reliability of an elevator system can be improved further.

  FIG. 6 is a configuration diagram of an elevator forced deceleration control system according to a sixth embodiment of the present invention. In this embodiment, the car acceleration detecting means 11A, the car load detecting means 11B, and the hoisting machine current detecting means 11C in the third to fifth embodiments are used as the car speed calculating physical data detecting means 11 in FIG. In addition, the car speed calculation means 6 in the elevator control device 5B has a car acceleration calculation unit 6a and a frequency calculation unit 6b.

  When the car speed calculation means 6 receives the detection values from the above three detection means 11A, 11B, and 11C, the calculation results based on the input of the detection values are displayed as first to third calculation values D1 to D3. Is output to the overspeed determination means 8.

  The overspeed determination means 8 determines that the car 3 is in an overspeed state if any one of the first to third calculated values D1 to D3 exceeds the threshold value. Other configurations and operations are substantially the same as the configuration of FIG.

  Although not shown, the travel region / travel direction specifying means 10 shown in FIG. 2 is attached, and the travel region / travel direction specifying means 10 is connected to any one of the detection means 11A, 11B, and 11C. If the detection signal is input, high control accuracy can be ensured similarly to the configuration of FIG. 2, and the safety and reliability of the elevator system can be further improved.

  FIG. 7 is a configuration diagram of an elevator forced deceleration control system according to a seventh embodiment of the present invention. In this embodiment, the car speed detecting means 11D is used as the fourth car speed calculating physical data detecting means in the structure of the sixth embodiment shown in FIG.

  That is, although not shown in FIGS. 1 to 6 so far, a governor (regulator) 12 is actually installed adjacent to the hoisting machine 1. One end side of the governor rope 13 wound around the governor 12 is attached to the upper portion of the car 3, and the other end side is attached to the lower portion of the car 3 via the governor sheave 14. The car speed detecting means 11D is attached to the governor 12.

  Then, the car speed calculation means 6 in the elevator control device 5C receives the detection values from the detection means 11A, 11B, and 11C, and outputs the calculation results based on the input of the detection values to the first to third calculations. The values D1 to D3 are output to the overspeed determination means 8. The overspeed determination means 8 directly inputs the speed detection signal S1 from the car speed detection means 11D.

  The overspeed determination means 8 determines that the car 3 is in an overspeed state if any one of the first to third calculation values D1 to D3 and the speed detection value S1 exceeds the threshold value. . Other configurations and operations are substantially the same as the configuration of FIG.

  Further, although not shown, the travel region / travel direction specifying means 10 shown in FIG. 2 is attached, and any one of the detection means 11A, 11B, 11C, 11D is added to the travel region / travel direction specifying means 10. If the detection signal is input, the high control accuracy can be ensured as in the configuration of FIG. 2, and the safety and reliability of the elevator system can be further improved.

  FIG. 8 is a configuration diagram of an elevator forced deceleration control system according to an eighth embodiment of the present invention. In this embodiment, in the configuration of the first embodiment of FIG. 1, a plurality of car detection switches SW1 to SWn are arranged in the terminal floor deceleration area, and these car detection switches SW1 to SWn are arranged on the car 3 side. And a car detection signal from the car detection switches SW1 to SWn are output to the threshold output means 7 in the elevator controller 5D.

  Then, at the time when the car 3 that has moved from the intermediate floor traveling area reaches the terminal floor deceleration area (that is, when the car detection switch SW1 outputs a detection signal), the threshold output means 7 sends the overspeed determination means 8 The output threshold is lowered by a predetermined level. In this case, the threshold value may be further lowered at each time point after which the detection switches SW2 to SWn sequentially output detection signals.

  Although the threshold value output by the threshold value output means 7 in the embodiment of FIG. 1 is a fixed value, according to this embodiment, the terminal floor deceleration area with a high degree of urgency (however, the car 3 moves from the intermediate floor to the terminal floor). The forced deceleration control in the case of heading) can be handled separately from the forced deceleration control in other areas, and the safety and reliability of the elevator system can be increased.

  Next, although a drawing is omitted, a ninth embodiment of the present invention will be described. In this embodiment, the speed excess determining means 8 in FIG. 1 has an excess time measuring function, and the state in which the calculated value from the car speed calculating means 6 exceeds the threshold value from the threshold output means 7 is a predetermined time Δt or more. If it continues, it is determined that the car speed of the car 3 is in an excess state.

  In this way, by determining the excess time determination means 8 to have an excess time measurement function, it is possible to determine the excess state by eliminating the case where the car speed calculation value only exceeds the threshold instantaneously due to the influence of noise or the like. It can be performed.

  However, in the forced deceleration control in the terminal floor deceleration area with a high degree of urgency (however, when the car 3 goes from the intermediate floor to the terminal floor), it is necessary to set the time Δt as short as possible. Alternatively, in the forced deceleration control in the terminal floor deceleration area, the excess time measuring function of the speed excess determining means 8 may be constrained (in this case, the travel area / travel direction specifying means in FIG. 2). 10 is added so that the overspeed determination means 8 can recognize that the terminal floor deceleration area has a high degree of urgency).

The block diagram of the forced deceleration control system of the elevator which concerns on the 1st Embodiment of this invention. The block diagram of the forced deceleration control system of the elevator which concerns on the 2nd Embodiment of this invention. The block diagram of the forced deceleration control system of the elevator which concerns on the 3rd Embodiment of this invention. The block diagram of the forced deceleration control system of the elevator which concerns on the 4th Embodiment of this invention. The block diagram of the forced deceleration control system of the elevator which concerns on the 5th Embodiment of this invention. The block diagram of the forced deceleration control system of the elevator which concerns on the 6th Embodiment of this invention. The block diagram of the forced deceleration control system of the elevator which concerns on the 7th Embodiment of this invention. The block diagram of the forced deceleration control system of the elevator which concerns on the 8th Embodiment of this invention.

Explanation of symbols

1: Hoisting machine 2: Rope 3: Riding car 4: Counterweight 5, 5A to 5D: Elevator control device 6: Car speed calculating means 6a: Car acceleration calculating part 6b: Frequency calculating part 7: Threshold output means 8: Speed Excess determining means 9: Forced deceleration control means 10: Traveling area / traveling direction specifying means 11: Car speed calculating physical data detecting means 11A: Car acceleration detecting means 11B: Car load detecting means 11C: Hoisting machine current detecting means 11D: Car speed detecting means 12: governor (governor)
13: governor rope 14: governor sheave 15: landing plate D1-D3: first to third calculation values S1: speed detection value SW1-SWn: car detection switch

Claims (9)

A hoist to drive the car,
A car speed detector attached to the hoist to detect the speed of the car;
It detects physical data that can be the basis for calculating the speed of the car, and at least car speed calculation physical data detection means excluding a speed detector attached to the hoisting machine,
Car speed calculating means for calculating the speed of the car based on the physical data detected by the car speed calculating physical data detecting means;
Threshold output means for outputting a preset threshold;
Overspeed determination means for determining whether the car is in an overspeed state based on a comparison between a car speed calculation value from the car acceleration calculation means and a threshold value from the threshold output means;
A forced deceleration control means for forcibly decelerating the hoist when it is determined that the overspeed determination means is in an overspeed state;
Elevator forced deceleration control system characterized by comprising: Based on the input of physical data from the car speed calculation physical data detection means, provided with a travel area and travel direction specifying means for specifying the travel area and travel direction of the car,
The threshold output means outputs the preset threshold according to the travel area and travel direction of the car specified by the travel area / travel direction specifying means.
The elevator forced deceleration control system according to claim 1. The car speed calculation physical data detecting means is car acceleration detecting means provided in the car for detecting the acceleration of the car as the physical data.
The car speed calculating means calculates the speed of the car from the detected acceleration value from the car acceleration detecting means.
The elevator forced deceleration control system according to claim 1. The car speed calculation physical data detecting means is a car load detecting means provided in the car for detecting a car load as the physical data.
The car speed calculation means calculates the car acceleration from the load detection value from the car load detection means, and calculates the speed of the car from the calculated car acceleration.
The elevator forced deceleration control system according to claim 1. The car speed calculation physical data detecting means is a hoisting machine current detecting means for detecting the current of the hoisting machine as the physical data,
The car speed calculation means calculates a current frequency from the current detection value from the hoisting machine current detection means, and calculates the speed of the car from the calculated current frequency.
The elevator forced deceleration control system according to claim 1. The car speed calculation physical data detecting means detects car acceleration provided in the car as the physical data, and detects a car load provided in the car as the physical data. Car load detection means, comprising a hoisting machine current detection means for detecting the current of the hoisting machine as the physical data,
The car speed calculation means calculates the speed of the car from the acceleration detection value from the car acceleration detection means as a first calculation value, calculates the car acceleration from the load detection value from the car load detection means, The speed of the car is calculated as a second calculation value from the calculated car acceleration, the current frequency is calculated from the current detection value from the hoisting machine current detection means, and the car speed is calculated from the calculated current frequency. Calculate the speed as the third calculation value,
The overspeed determination means determines that the car is in an overspeed state when any of the first to third calculation values by the car speed calculation means exceeds the threshold;
The elevator forced deceleration control system according to claim 1. A car speed detecting means attached to a speed governor installed adjacent to the hoisting machine to detect the speed of the car;
The speed excess determining means is configured to determine whether the car is in a state where one of the first to third calculated values by the car speed calculating means or a speed detected value from the car speed detecting means exceeds the threshold value. Determine that it is in overspeed condition,
The forced deceleration control system for an elevator according to claim 6. A car detection switch disposed in a terminal floor deceleration area of the hoistway and outputting a car detection signal indicating that the car has reached a predetermined position in the area from the intermediate floor travel area;
The threshold output means, after inputting the car detection signal from the car detection switch, lowers the threshold by a predetermined level and outputs it.
The elevator forced deceleration control system according to claim 1. The overspeed determination means determines that the car is in an overspeed state when the state exceeding the threshold value of the car speed calculation value continues for a predetermined time or more.
The elevator forced deceleration control system according to claim 1.

Images