JP2008230758A - Terminal floor speed control system of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal floor speed control system of an elevator capable of simplifying the constitution thereof. <P>SOLUTION: When a car 2 is lowered and a terminal floor deceleration section detection means 18 detects the presence of a long detection member 16, the terminal floor deceleration section detection means 18 outputs the signal indicating that the car 2 is located in a terminating deceleration section RS to a speed control means 11. The speed control means 11 compares an overspeed threshold set according to the distance from the deceleration starting position P1 with the detected traveling speeds from speed detectors 12, 13, and when the detected traveling speed exceeds the overspeed threshold, the car 2 is forcibly decelerated and stopped. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an elevator terminal floor speed control system.

  When the elevator car travels from the departure floor to the destination floor, it will gradually decelerate after passing the deceleration start position set near the destination floor and then land at the landing position on the destination floor by the subsequent landing control. It has become. However, in the unlikely event that the car continues to run without sufficient deceleration due to some abnormality, the car will be at the top or bottom of the hoistway on the final floor (top floor or bottom floor). It will collide. For this reason, a shock absorber is provided at the lowermost part of the hoistway so as to buffer the impact at the time of collision.

The stroke value of this shock absorber is determined according to the value of the rated speed of the car, but in the case of a high-speed elevator where the rated speed exceeds 180 [m / min], the stroke value is also very large. Therefore, it becomes difficult to secure the hoistway space necessary for the building. Therefore, in practice, a shock absorber having a stroke value that is about 1/2 to 1/3 of the value determined by the rated speed is used, and a zone where forced deceleration control is performed on the terminal floor (in this specification, “terminal terminal deceleration”). (Referred to as “section”). If an overspeed is detected at the deceleration start position in the terminal floor deceleration zone, the car is forcibly decelerated and stopped by applying a brake (see Patent Document 1).
JP 2004-123279 A

  However, in the conventional system, many detection switches and corresponding devices are provided to detect the position of the car in the deceleration zone (see FIG. 7 of Patent Document 1), and the position of the car between the detection switches is further determined. Computation has to be performed using a computation method such as linear interpolation, resulting in a complicated configuration.

  Recently, it has been required to reduce the hoistway space as much as possible for effective use of buildings even for low-speed elevators with a rated speed of 105 [m / min] or less. Since the floor deceleration section is also shortened, it is difficult to apply the configuration of the conventional system having many detection switches as it is.

  The present invention has been made in view of the above circumstances, and has an object to provide an elevator terminal floor speed control system that can be applied to either a high-speed elevator or a low-speed elevator while simplifying the configuration. .

  As means for solving the above-mentioned problems, the invention according to claim 1 is characterized in that a detected member having a predetermined length disposed along a terminal floor deceleration section in a hoistway and a detected member attached to a car and detected. The terminal floor deceleration section detecting means for detecting that the car is located in the terminal floor deceleration section by detecting the member, and the terminal floor deceleration that the car is positioned in the terminal floor deceleration section When the section detection means detects, the overspeed threshold set according to the distance from the deceleration start position in the terminal floor deceleration section is compared with the detected traveling speed of the car, and the detected traveling speed is overspeed. And speed control means for forcibly decelerating and stopping the car when the threshold is exceeded.

  According to a second aspect of the invention, in the first aspect of the invention, the speed control means obtains the distance from the deceleration start position of the terminal floor deceleration section by integrating the detected traveling speed of the car. It is characterized by that.

  The invention according to claim 3 is the invention according to claim 1, wherein the lowest level of the overspeed threshold immediately before the terminal floor landing position set in the terminal floor deceleration zone is stopped in the terminal floor deceleration zone. The car is set higher than the maximum speed between the start of travel and the arrival at the final floor landing position, and the speed control means stops the car within the final floor deceleration zone. When the car is re-traveled later, the overspeed threshold used between the start of the re-start and the arrival at the final floor landing position is fixed to this minimum level.

  The invention according to claim 4 is characterized in that, in the invention according to claim 1, the overspeed threshold value is set so as to decrease stepwise in accordance with the distance from the deceleration start position of the terminal floor deceleration section. To do.

  The invention according to claim 5 is characterized in that, in the invention according to claim 1, the overspeed threshold value is set so as to gradually decrease in accordance with the distance from the deceleration start position of the terminal floor deceleration section. To do.

  According to a sixth aspect of the present invention, in the first aspect of the invention, the terminal floor deceleration zone detecting means has a light emitting portion and a light receiving portion, and light projection from the light emitting portion to the light receiving portion is blocked. Further, it is characterized in that it detects a long member to be detected.

  The invention according to claim 7 is the invention according to claim 1, wherein the elongated member to be detected is formed of a magnetic material, and the terminal floor deceleration zone detecting means detects the magnetism, It is characterized by detecting a long member to be detected.

  The invention according to claim 8 is the invention according to claim 1, wherein two sets of the elongated detected member and the terminal floor deceleration section detecting means are provided, and the speed control means is configured such that the car is in the terminal floor deceleration section. When the terminal floor deceleration zone detecting means of any one of the two sets detects that the vehicle is positioned, the overspeed threshold value is compared with the detected traveling speed of the car. And

  ADVANTAGE OF THE INVENTION According to this invention, while simplifying a structure, the termination | terminus floor speed control system of an elevator applicable to either a high-speed elevator or a low-speed elevator is realizable.

  FIG. 1 is a configuration diagram of an elevator terminal floor speed control system according to an embodiment of the present invention. A hoistway 1 is formed in the building, and the car 2 can move up and down in the hoistway 1. One end of the main rope 3 is attached to the car 2. The intermediate portion of the main rope 3 is wound around a hoisting machine 4 installed in the machine room, and the other end is attached to a counterweight 6 after passing through a deflecting sheave 5.

  On the other hand, one end side and the other end side of the governor rope 7 are attached to the car 2. The governor rope 7 is wound so as to pass through the governor 8 and the governor sheave 9.

  The hoisting machine 4 is controlled by speed control means 11 provided in the elevator control device 10. The speed control means 11 inputs the detected traveling speeds from the speed detectors 12 and 13 attached to the hoisting machine 4 and the governor 8 respectively, and compares this with the preset overspeed threshold value, and the terminal floor level. Speed control is performed on the (top floor and bottom floor). One of the two speed detectors 12 and 13 may be omitted.

FIG. 1 shows a configuration in which devices such as the hoisting machine 4, the governor 8, and the elevator control device 10 are installed in the machine room above the hoistway 1, but the machine room is not provided. In the case of an elevator system, these devices are installed near the uppermost part of the hoistway 1, and the elevator control device 10 may be installed near a landing on a specific floor.
A pit for maintenance work of the car 2 is provided at the bottom of the hoistway 1, and the car for reducing the impact when the car 2 and the counterweight 6 are dropped due to an accident on the pit floor. A shock absorber 14 and a counterweight shock absorber 15 are provided.

  A long detected member 16 is attached to the side wall of the hoistway 1 near the lowest floor, which is one terminal floor, via a support member 17. The elongated detection member 16 is formed of a material such as a thin steel plate, for example, and is disposed along the terminal floor deceleration section RS from the deceleration start position P1 to the landing position P2. In addition, a similar elongated detected member 16 is attached to the side wall of the hoistway 1 near the top floor, which is the other terminal floor, via a support member 17.

  Terminal floor deceleration section detecting means 18 is attached to the side surface of the car 2. The terminal floor deceleration section detecting means 18 is for detecting that the car 2 is located in the terminal floor deceleration section RS by detecting the presence of the elongated detected member 16. The detection signal is output to the speed control means 11 of the elevator control device 10.

  In addition, although the elongate to-be-detected member 16 is attached so that the upper end part may correspond with the deceleration start position P1, the lower end part is extended further below rather than the landing position P2 of a terminal floor. This is because it is necessary to position the car 2 further below the landing position P2 when performing inspection operation or maintenance work.

  2 is a view taken in the direction of arrows II-II in FIG. In this figure, two terminal floor deceleration zone detecting means 18 are attached to the side surface of the car 2. The terminal floor deceleration zone detecting means 18 is formed with a groove 18a, and a light emitting portion 19 and a light receiving portion 20 are provided on both sides of the groove 18a. And in the state of illustration, a part of elongate to-be-detected member 16 is located inside the groove part 18a.

  The light emitting unit 19 always performs a light projecting operation on the light receiving unit 20, and in a state where the light receiving unit 20 receives light projected from the light emitting unit 19, the terminal floor deceleration zone detecting means 18 detects the terminal floor deceleration zone detection signal. Is not output to the speed control means 11. On the other hand, the light projection from the light emitting unit 19 is shielded by a part of the elongated detection member 16 located inside the groove 18a, and the light receiving unit 20 cannot receive light (that is, illustrated in FIG. 2). In the state), the terminal floor deceleration zone detection means 18 outputs a terminal floor deceleration zone detection signal to the speed control means 11.

  Note that, as shown in FIG. 2, the configuration in which two sets of the terminal floor deceleration section detecting means 18 and the long detected member 16 are provided is intended to improve reliability. That is, even if one of the sets of terminal floor deceleration section detecting means 18 cannot detect the presence of the elongated detected member 16 due to a failure of the light emitting unit 19 or the light receiving unit 20, the other The terminal floor deceleration zone detecting means 18 of the set of the above can detect the presence of the long detected member 16 without any trouble.

  FIG. 3 is an explanatory diagram illustrating an example of control characteristics when the speed control unit 11 performs the deceleration control at the terminal floor. The speed control means 11 decelerates the car 2 from the time when the car 2 passes the deceleration start position P1 according to the normal deceleration pattern C1, and then places the car 2 at the landing position P2. .

  Overspeed thresholds S1 to S5 are set in the deceleration zone from the deceleration start position P1 to the landing position P2 so that the level gradually decreases stepwise as the distance from the deceleration start position P1 increases. Further, the governor operation level GL is set over the deceleration zone and the normal running zone above the maximum level overspeed threshold S1.

  Next, the operation of FIGS. 1 and 2 will be described based on the flowchart of FIG. Now, the car 2 is descending from the intermediate floor toward the lowest floor, and the speed control means 11 inputs the detected traveling speed from the speed detectors 12 and 13 (step 1). At this time, the speed control means 11 also receives a signal from the terminal floor deceleration zone detection means 18 (step 2), and determines whether the car 2 has entered the deceleration zone based on this signal (step 2). 3). As described above, the terminal floor deceleration zone detection means 18 does not output the terminal floor deceleration zone detection signal if the projection light from the light emitting unit 19 is not shielded by the elongated detected member 16, and the step 3 Since the determination result is “NO”, the processing from Step 1 is repeated.

  However, when the car 2 further descends and the light emitted from the light-emitting portion 19 is blocked by the elongated detected member 16, the terminal floor deceleration zone detection means 18 sends the terminal floor deceleration zone detection signal to the speed control means 11. Output to. As a result, the determination result in step 3 is “YES”, and the speed control means 11 calculates the distance from the deceleration start position P1 of the car 2, that is, the current position (step 4). The speed control means 11 of the present embodiment obtains the distance from the deceleration start position P1 by integrating the detected traveling speed from the speed detector 12 or 13.

  Next, the speed control means 11 compares the overspeed threshold corresponding to the distance from the deceleration start position P1 with the detected traveling speed of the car 2 (step 5). If it is determined that the detected traveling speed is not overspeed, the speed control means 11 performs normal deceleration control according to the normal deceleration pattern C1 (steps 6 and 7), and then performs landing control (step). 8) End all operations.

  On the other hand, if it is determined that the detected traveling speed is overspeed, the speed control means 11 performs forced deceleration control (steps 6 and 9), and then performs landing control (step 8) for all operations. Exit.

  FIG. 5 is an explanatory diagram illustrating an example of control characteristics when the speed control unit 11 performs the forced deceleration control in step 9. In this figure, the speed control means 11 is sufficiently decelerated due to some abnormality even though the car 2 travels in the direction of the arrow in accordance with the actual travel locus and the deceleration control is performed after passing the deceleration start position P1. Therefore, it is assumed that the detected traveling speed has exceeded the overspeed threshold S3 at the position PA.

  Therefore, the speed control means 11 immediately executes forced deceleration control on the hoisting machine 4, and the speed of the car 2 is rapidly increased so that the speed becomes below a certain level when the car 2 reaches the position PB. Reduce the running speed. This forced deceleration does not reduce the rotational speed of the hoisting machine 4 based on the speed command to the inverter, but brakes the hoisting machine 4 in order to enable a rapid reduction in the speed level (brake This is done by stopping energization of the coil). Therefore, the steep slope in the characteristic curve between the position PA and the position PB is mainly determined by the performance of the brake device of the hoisting machine 4.

  The speed control means 11 thus reduces the speed of the car 2 to a certain level or less at the position PB, and then executes the landing control so as to land the car 2 at the landing position P2.

  As described above, the terminal floor deceleration section detecting means 18 is attached to the car 2 side, and the terminal floor deceleration section detecting means 18 is arranged along the uppermost floor and the lowermost terminal floor deceleration section RS on the hoistway 1 side. Thus, the configuration of the present embodiment is realized. Then, overspeed threshold values S1 to S5 are set according to the distance from the deceleration start position P1, and forced deceleration control is performed when the detected traveling speed exceeds the overspeed threshold value. Therefore, the configuration of the present embodiment is greatly simplified compared to the conventional system.

  1 is attached to the side wall of the hoistway 1 as a long member 16 to be fixed as a fixed member, and the terminal floor deceleration section detecting means 18 is attached to a side surface of the car 2 as a movable member. Therefore, the necessary hoistway space can be made constant regardless of the length of the terminal floor deceleration section RS. Therefore, the present invention is applicable to both a high speed elevator in which the terminal floor deceleration section RS is long and a low speed elevator in which the terminal floor deceleration section RS is short. With this configuration, the long detection member 16 is attached to the side surface of the car 2 as a movable member, and the terminal floor deceleration zone detection means 18 is attached to the side wall of the hoistway 1 as a fixed member. The hoistway space becomes large, making it difficult to apply to both high speed and low speed elevators.

  By the way, in this embodiment, the minimum level overspeed threshold value S5 is larger than a certain level, and after the car 2 is temporarily stopped in the deceleration zone due to a power failure or the like, In the case of running, the control by the speed control means 11 does not cause trouble due to the overspeed threshold.

  That is, FIG. 6 illustrates an example of speed characteristics until the car 2 arrives at the landing position P2 from the stop position PS after the car 2 is temporarily stopped at the position PS in the deceleration zone. FIG. As shown in this figure, the maximum speed of the car 2 between the stop position PS and the landing position P2 is Vmax, and the minimum level overspeed threshold S5 is set higher than this. And the speed control means 11 fixes the overspeed threshold value used in the case of re-running after once stopping so that it may become S5 over the whole deceleration area.

  Accordingly, it is possible to avoid a situation in which the overspeed threshold is exceeded and the car 2 stops in the deceleration zone again until the car 2 moves from the stop position PS to the landing position P2. If the overspeed threshold of a level lower than the overspeed threshold S5 is set up to the vicinity of the landing position P2 according to the distance from the deceleration start position P1, the car 2 arrives at the landing position P2. It will stop again in the meantime.

  Further, although the overspeed threshold values S1 to S5 shown in FIG. 2 are such that the level decreases stepwise according to the distance of the deceleration start position P1, as shown in FIG. By overlying the upper edge of the overspeed threshold SC, which continuously decreases gradually, can be used.

  That is, in the case of the overspeed thresholds S1 to S5 that change stepwise, the space between the lower edge and the normal deceleration pattern C1 is small, and the speed of the car 2 exceeds the overspeed threshold in actual traveling. Since the phenomenon tends to occur, the level of the normal deceleration pattern C1 cannot be increased so much. However, the overspeed threshold SC that gradually decreases continuously does not have an edge that occurs in the overspeed thresholds S1 to S5, so that it is possible to use the deceleration pattern C2 with a speed margin larger than the normal deceleration pattern C1. Become.

Furthermore, the present invention broadly encompasses the following forms.
(1) The terminal floor deceleration zone detection means 18 of the above embodiment detects the presence of the elongated detected member 16 when the light projection from the light emitting unit 19 to the light receiving unit 20 is blocked. However, the long detection member 16 is formed of a magnetic material, and the terminal floor deceleration section detecting means 18 detects the presence of the long detection member 16 when detecting the magnetism. It is good.
(2) Although the configuration of the above embodiment and (1) is a method in which the terminal detection member 18 detects the long detected member 16 in a non-contact manner, a contact method can also be adopted. It is. That is, as the long member to be detected 16, a flat contact surface is provided on the front surface facing the car 2, and the contact surface of the contact plate is contacted as the terminal floor deceleration zone detection means 18. The limit switch to be mounted may be attached to the car side.
(3) In the configuration shown in FIG. 2, the reliability is improved by providing two sets of the elongated detected member 16 and the terminal floor deceleration section detecting means 18, but of course importance is attached to the simplification of the configuration. It is good also as a structure which makes only one set.

The block diagram of the terminal floor speed control system of the elevator which concerns on embodiment of this invention. II-II arrow line view in FIG. Explanatory drawing which shows the example of a control characteristic at the time of the speed control means in FIG. 1 performing deceleration control in the last floor. The flowchart for demonstrating the operation | movement of FIG. FIG. 3 is an explanatory diagram illustrating an example of control characteristics when the speed control unit in FIG. 1 actually performs deceleration control. Explanatory drawing which shows the example of a control characteristic in case the speed control means in FIG. 1 makes a car re-run after a car stops in the termination | terminus floor deceleration area. FIG. 3 is an explanatory diagram showing an example of control characteristics different from that in FIG. 2 when the speed control unit in FIG.

Explanation of symbols

1: hoistway 2: car 3: main rope 4: hoist 5: deflector sheave 6: counterweight 7: governor rope 8: governor 9: governor sheave 10: elevator controller 11: speed control means 12: speed detector 13 : Speed detector 14: Car shock absorber 15: Counterweight shock absorber 16: Long member to be detected 17: Support member 18: Terminal floor deceleration section detecting means 18a: Groove portion 19: Light emitting portion 20: Light receiving portion RS : Terminal floor deceleration zone P1: Deceleration start position P2: Landing positions S1 to S5: Overspeed threshold

Claims (8)

A member to be detected of a predetermined length disposed along the terminal floor deceleration section in the hoistway;
A terminal floor deceleration zone detection means for detecting that the car is located in the terminal floor deceleration zone by detecting the detected member attached to the car;
It is set according to the distance from the deceleration start position of the terminal floor deceleration zone when the terminal floor deceleration zone detection means detects that the car is located in the terminal floor deceleration zone. A speed control means for comparing the overspeed threshold and the detected traveling speed of the car, and forcibly decelerating and stopping the car when the detected traveling speed exceeds the overspeed threshold;
An elevator terminal floor speed control system characterized by comprising: The speed control means obtains the distance from the deceleration start position of the terminal floor deceleration section by integrating the detected traveling speed of the car.
The elevator terminal floor speed control system according to claim 1. The minimum level of the overspeed threshold just before the terminal floor landing position set in the terminal floor deceleration section is the terminal floor after the car that has stopped in the terminal floor deceleration section starts traveling. It is set higher than the maximum speed until it reaches the landing position,
The speed control means is an overspeed threshold used between the start of re-running and arrival at the terminal floor landing position when the car is re-running after the car stops in the terminal-floor deceleration zone. Is fixed at this minimum level,
The elevator terminal floor speed control system according to claim 1. The overspeed threshold is set to decrease stepwise according to the distance from the deceleration start position of the terminal floor deceleration zone.
The elevator terminal floor speed control system according to claim 1. The overspeed threshold is set so as to decrease gradually according to the distance from the deceleration start position of the terminal floor deceleration section,
The elevator terminal floor speed control system according to claim 1. The terminal floor deceleration zone detecting means has a light emitting part and a light receiving part, and detects the elongated detected member when light projection from the light emitting part to the light receiving part is blocked. ,
The elevator terminal floor speed control system according to claim 1. The elongated detection member is formed of a magnetic material,
The terminal floor deceleration zone detecting means detects the elongated member to be detected when the magnetism is sensed.
The elevator terminal floor speed control system according to claim 1. Two sets of the elongated detected member and the terminal floor deceleration section detecting means are provided,
The speed control means is configured to detect the overspeed threshold when the car is located in the terminal floor deceleration section and any one of the two terminal floor deceleration section detection means detects the car. Compare with the detected running speed of the car.
The elevator terminal floor deceleration control system according to claim 1.

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