KR20070049219A - Elevator safety system - Google Patents

Abstract

The margin is given so as not to be lower than the normal deceleration pattern of the car 11 to the end layer stop position, and the margin is given so as not to be lower than the deceleration pattern by the hoist 13 when the deceleration pattern is not normally decelerated. And a second pattern set by setting the first pattern, and a third pattern set by giving a margin not to be lower than the first pattern, and a fourth pattern set by giving a margin so as not to be lower than the second pattern, and the car speed V is the first. And brakes when both sides of the second pattern are exceeded, and emergency stop 14 is activated when the third and fourth patterns are exceeded. This obtains an elevator safety system with good operating efficiency without unnecessarily operating the braking device.

Description

Elevator safety system {ELEVATOR SAFETY SYSTEM}

1 is a block diagram conceptually showing an elevator system according to Embodiment 1 of the present invention;

2 is an explanatory diagram showing an overspeed detection pattern based on the normal time deceleration pattern according to the first embodiment of the present invention;

3 is an explanatory diagram showing an overspeed detection pattern based on an abnormality deceleration pattern according to Embodiment 1 of the present invention;

4 is a block diagram conceptually showing an elevator system according to Embodiment 2 of the present invention;

5 is an explanatory diagram showing an overspeed detection pattern based on the normal time deceleration pattern according to the second embodiment of the present invention;

6 is an explanatory diagram showing an overspeed detection pattern based on an abnormality deceleration pattern according to a second embodiment of the present invention;

7 is a block diagram conceptually showing an elevator system according to Embodiment 3 of the present invention;

8 is an explanatory diagram showing an overspeed detection pattern based on the normal time deceleration pattern according to the third embodiment of the present invention;

9 is an explanatory diagram showing an overspeed detection pattern based on the abnormality deceleration pattern according to the third embodiment of the present invention.

Explanation of symbols for the main parts of the drawings

10: hoist 11: car

12: balance weight 13: hoist

14: emergency stop 15: shock absorber

16: car position detection means

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator safety system in which an elevator operates a braking device during an abnormal acceleration, and more particularly to an elevator safety system having good operating efficiency without unnecessarily operating a braking device.

Conventionally, in an elevator system, a safety device having an overspeed detection pattern is provided, and when an elevator car speed is detected to be overspeed, an emergency stop provided in the governor is operated (example) For example, see FIG. 11 of Unexamined-Japanese-Patent No. 2001-354372.

That is, the conventional system has a means for determining an overspeed detection pattern based on a parameter such as an elevator car position, a means for detecting an overspeed state of an actual car speed with reference to this pattern, and when overspeed is detected. A governor for operating the emergency stop is provided, and the emergency stop is operated when the car speed exceeds the overspeed detection pattern. However, the conventional overspeed detection pattern is determined without considering that the elevator may decelerate safely by the hoist torque even when the car accelerates abnormally.

In the conventional elevator safety system, as described above, the overspeed detection pattern is determined without considering that the speed of the car can be decelerated by the torque of the hoist even when the car accelerates abnormally. There has been a problem in that a braking device such as a stopper is operated unnecessarily, causing discomfort to the passengers and confining the passengers in the car.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain an elevator safety system having good operating efficiency without unnecessarily operating a braking device.

An elevator safety system according to the present invention is an elevator safety system having a measuring device for detecting an overspeed of a car of an elevator and configured to operate at least one braking device according to the degree of overspeed, wherein the overspeed as a criterion for determining the speed The detection pattern is composed of at least one pattern that continuously varies depending on the position of the car in the deceleration area near the end layer of the car.

Moreover, the elevator safety system which concerns on this invention is equipped with the measuring apparatus which detects the overspeed state of the car of the elevator driven up and down by a traction machine, The elevator which operates at least one of the 1st and 2nd braking apparatus according to the overspeed state. In the safety system, the first overspeed detection pattern set by giving the first margin and the car is normally toward the stop position of the car end layer so that the car does not fall below the deceleration travel pattern when the car normally decelerates toward the stop position of the end layer. When it is not possible to decelerate, a second margin is provided so as not to be lower than the deceleration pattern in order to decelerate by the torque of the hoisting machine, and a third margin is provided so as not to be lower than the first overspeed detection pattern. A fourth set by giving a fourth margin so as not to be lower than the set third overspeed detection pattern and the second overspeed detection pattern The first braking device is operated when the speed of the car exceeds both of the first and second speeding detection patterns, and the speed of the car exceeds the third and fourth speeding detection patterns. To operate the brake system.

EMBODIMENT OF THE INVENTION Hereinafter, it demonstrates in detail in Example 1 of this invention, referring drawings.

1 is a block diagram showing Embodiment 1 of the present invention together with an elevator system.

In FIG. 1, an elevator car (hereinafter simply referred to as a "car") 11 carrying cargoes used by passengers is arranged in the hoistway 10 in such a way as to elevate.

A counterweight 12 is provided at the other end of the rope hanging the car 11.

The hoist 13 is provided at the top of the elevator service floor, for example, and supplies a driving force to the car 11 and has a brake brake (not shown).

The emergency stop 14 is installed in the car 11 and gives a braking force to the car 11.

The shock absorber 15 is provided at the lowest end (termination layer) of the hoistway 10.

The car position detection means 16 consists of a well-known measuring apparatus which detects the position S of the car 11, and is installed in several places in the hoistway 10. As shown in FIG.

Similarly, the car speed detection means 17 consists of a well-known measuring apparatus which detects the speed V of the car 11, and is provided in several places in the hoistway 10. As shown in FIG.

The elevator safety device 18 transmits a detection signal indicative of the car position S and the car speed V from the car position detecting means 16 and the car speed detecting means 17, and abnormal overspeed, which cannot normally be decelerated, is detected. The brake or emergency stop 14 in the hoist 13 is operated.

2 and 3 are explanatory views showing the first and second overspeed detection patterns applied to the first embodiment of the present invention, wherein the horizontal axis represents the position [m] of the car 11 in the hoistway 10, and the vertical axis represents the car. (11) speed [m / min].

The overspeed detection pattern is predetermined so that the braking device (brake or emergency stop 14) does not operate unnecessarily even when there is a disturbance assumed during normal driving of the car 11 or a measurement error of the car position detecting means 16. It is set to the allowable width of.

In addition, the overspeed detection pattern is a measurement error of the car position detecting means 16 such that at least one of the plurality of control devices operates normally, and so that a control device other than the control device that normally operates during deceleration of the car 12 does not operate. In consideration of the operation delay of the normally operating control device, the predetermined width is set.

In FIG. 2, curve 111 shows the normal deceleration pattern when the car 11 approaches with deceleration towards the landing position of the termination layer, and curve 112 shows the first overspeed for actuating the brake. It is a detection pattern, and curve 113 is a third overspeed detection pattern for operating the emergency stop 14.

3, the curve 121 is a speed detection pattern for deceleration instruction generation for slowing down by the hoisting machine 13, and the torque of the hoisting machine 13 when it cannot normally decelerate toward the stop position of an end layer. The deceleration pattern for deceleration by (deceleration force) is shown.

Curve 122 is the second overspeed detection pattern for actuating the brake, and curve 123 is the fourth overspeed detection pattern for actuating the emergency stop 14.

The first speeding detection pattern 112 is normally set to impart a first margin M1 to the deceleration pattern 111, and the third speeding detection pattern 113 is configured to give a third margin to the first speeding detection pattern 112. M3) is set.

Similarly, the second overspeed detection pattern 122 is set to impart a second margin M2 to the deceleration pattern 121, and the fourth overspeed detection pattern 123 has a fourth margin to the second overspeed detection pattern 122. It is set to give M4.

2 and 3, each speed detection pattern serving as a criterion for determining the speed is continuously variable according to the position of the car 11 in the deceleration area near the end layer of the car 11. It is a pattern.

Next, an operation according to the first embodiment of the present invention shown in FIG. 1 will be described with reference to FIGS. 2 and 3.

The elevator safety device 18, when the car position S and the car speed V detected in real time from each detection means exceeds both of the first overspeed detection pattern 112 and the second overspeed detection pattern 122. Then, it is determined that the car 11 cannot decelerate in the vicinity of the terminal layer due to any abnormality, and the brake in the hoist 13 is operated.

In addition, when the elevator safety device 18 exceeds both of the third speed detecting pattern 113 and the fourth speed detecting pattern 123, the elevator safety device 18 determines that the car 11 is in an accelerated state any more, and the emergency Activate the stop 14.

In this way, by comparing the actual car position S and the car speed V with the stepped speed detection pattern, even when an abnormality occurs, for example, even when an abnormality occurs, it is possible to decelerate by the torque of the hoisting machine 13 in the hoisting machine 13. When the emergency stop 14 of the brake or car 11 is not operated unnecessarily, safety is ensured, and the brake or emergency stop 14 is first displayed at a time when the speed of the deceleration cannot be achieved by the torque of the hoisting machine 13. Can be operated.

Therefore, an elevator safety system with good driving efficiency can be obtained without unnecessarily operating the braking device.

Example  2

In addition, in the said Example 1, although the fluctuation | variation by the mischief of the passenger in the car 11, the error contained in each detection means, etc. were not considered, the specific fluctuation | variation and detection error of the car 11 are taken into consideration. The overspeed state may be determined.

Fig. 4 is a block diagram showing the second embodiment of the present invention together with the elevator system, and the same reference numerals are given to the same ones as those described above (see Fig. 1), or “A” is given after the reference numerals for detailed explanation. Omit.

In Fig. 4, passengers (particularly children) in the car 11 may play a joke or shake.

The elevator safety device 18A considers the case where a passenger's fluctuation exists in the car 11, and considers that the car position detecting means 16A and the car speed detecting means 17A include a measurement error. Determine the overspeed condition.

5 and 6 are explanatory views similar to those of FIGS. 3 and 4 described above, and the curves 111 and 121 are normal deceleration patterns and deceleration patterns similar to those described above.

In FIG. 5, curve 212 is the first overspeed detection pattern for actuating the brake in hoist 13 and curve 213 is the third overspeed detection pattern for actuating emergency stop 14.

Further, the curve 214 is a maximum swinging speed pattern obtained by plotting the maximum speed reached when the passenger in the car 11 shakes the car 11 while decelerating normally.

The first overspeed detection pattern 212 is set so as not to fall below the maximum speed pattern 214 at the time of oscillation even when the errors of the respective detection means (measuring devices) 16A and 17A are taken into consideration.

Similarly, the third overspeed detection pattern 213 is set not to be lower than the first overspeed detection pattern 212 even when the error of the measuring device and the operation delay of the brake are taken into consideration.

6, curve 222 is a second overspeed detection pattern for operating the brake in the hoist 13, and curve 223 is a fourth overspeed detection pattern for operating the emergency stop 14. In FIG. .

The second overspeed detection pattern 222 is set not to be lower than the deceleration pattern 121 even when the error of the measuring device is taken into consideration. In addition, the fourth overspeed detection pattern 223 is set not to fall below the second overspeed detection pattern 222 even when the error of the measuring device and the operation delay of the brake are taken into consideration.

That is, in this case, the first margin MlA, which determines the first overspeed detection pattern 212, includes the fluctuation width and the speed fluctuations caused by the car fluctuations by the passengers in the car 11, and the respective detection means (measurement device). The detection errors of 16A and 17A are determined in consideration, and the second to fourth margins M2A to M4A are determined in consideration of the detection error of the measuring device and the operation delay of the brake.

5 and 6, each speed detection pattern serving as a criterion for determining the speed is a continuous variable pattern according to the position of the car 11 in the deceleration area near the end layer of the car 11. Is done.

Next, an operation according to the second embodiment of the present invention shown in FIG. 4 will be described with reference to FIGS. 5 and 6.

Now, when the car speed V cannot decelerate near the end layer due to any abnormality, and exceeds the first overspeed detection pattern 212 and the second overspeed detection pattern 222, the elevator safety device 18A is the hoisting machine. Activate the brake in (13).

Furthermore, when the car 11 accelerates abnormally and the car speed V exceeds the third overspeed detection pattern 213 and the fourth overspeed detection pattern 223, the elevator safety device 18A includes the car 11. The emergency stop 14).

In this way, the speed detection pattern in consideration of various fluctuation factors including the behavior of the passengers in the car 11, the detection error of the measuring device, and the like is used as a criterion for determining the car speed V, so that the passengers in the car 11 Even if this car jumps and shakes the car 11, it is possible to prevent the brake and the emergency stop 14 from being unnecessarily operated.

Example  3

In addition, in Example 1, although the performance difference of the brake and the emergency stop part 14, the operation delay, the distance from the car 11 to the shock absorber 15, etc. were not considered, the performance of the brake and the emergency stop part 14 was not considered. The overspeed state may be determined in consideration of the difference, the operation delay, and the distance from the car 11 to the shock absorber 15.

FIG. 7 is a block diagram showing Embodiment 3 of the present invention in consideration of the difference in the braking device, the operation delay, and the distance D from the car 11 to the shock absorber 15. FIG. The same code | symbol is attached | subjected or "B" is attached | subjected after a code | symbol, and detailed description is abbreviate | omitted.

In FIG. 7, the elevator safety device 18B sets the first to fourth overspeed detection patterns in consideration of the performance delay and the operation delay of the brake and the emergency stop 14, and the speed V of the car 11. ) Is decelerated to the allowable capacity of the shock absorber 15.

8 and 9 are explanatory views similar to those of FIGS. 5 and 6 described above, and each of the curves 111 and 121 is a normal deceleration pattern and a deceleration pattern similar to those described above.

8 and 9, the curve 332 is a deceleration pattern that can decelerate to the maximum permissible capacity of the shock absorber 15 by the brake after overspeed detection. The deceleration pattern 332 measures the distance D from the car 11 to the shock absorber 15 when the overspeed state is determined based on the deceleration pattern 332, the operation delay of the brake, and the measurement. It is set in consideration of the detection delay of the device and the maximum value of the acceleration at the time of abnormality.

Curve 333 is also a deceleration pattern that can be decelerated by emergency stop 14 after overspeed detection. The deceleration pattern 333 is a distance D from the car 11 to the shock absorber 15 when the overspeed state is determined based on the deceleration pattern 333, and the emergency stop 14 is provided. It is set in consideration of the operation delay, the detection delay of the measuring device, and the maximum value of the acceleration at the time of abnormality.

In FIG. 8, curve 312 is a first overspeed detection pattern established by imparting a first margin to actuate the brake, and curve 313 imparts a third margin to actuate emergency stop 14. The third overspeed detection pattern is set.

The first overspeed detection pattern 312 is set lower than the deceleration pattern 332 in consideration of an error of the measuring device.

Similarly, the third overspeed detection pattern 313 is set lower than the deceleration pattern 333 in consideration of an error of the measuring device.

In FIG. 9, curve 322 is a second overspeed detection pattern set by giving a second margin to activate the brake, and curve 323 gives a fourth margin to operate the emergency stop 14. It is a set fourth speed detection pattern.

The second overspeed detection pattern 322 is set lower than the deceleration pattern 332 in consideration of the error of the measuring device, and the fourth overspeed detection pattern 323 is set lower than the deceleration pattern 333 in view of the error of the measuring device. It is set low.

Next, with reference to FIG. 8 and FIG. 9, the operation by Embodiment 3 of this invention shown in FIG. 7 is demonstrated.

When the elevator safety device 18B determines that the car speed V cannot decelerate near the end floor due to any abnormality and exceeds the first overspeed detection pattern 312 and the second overspeed detection pattern 322, The brake in the hoist 13 is operated.

In addition, when the car 11 accelerates and the car speed V exceeds the third overspeed detection pattern 313 and the fourth overspeed detection pattern 323, the emergency stop unit 14 is operated.

Thereby, the car speed V at the time of colliding with the shock absorber 15 can be suppressed below the maximum allowable capacity of the shock absorber 15.

In each of the above embodiments, although the brake and the emergency stop 14 in the hoisting machine 13 are applied as the first and second braking devices, it is needless to say that even if other braking devices are applied, the same effects are obtained. .

As described above, according to the present invention, the first overspeed detection pattern and the stop of the carga termination layer set by applying the first margin so that the car does not fall below the deceleration traveling pattern when the car normally decelerates toward the stop position of the termination layer. When it is not possible to normally decelerate toward the position, the third overspeed detection pattern and the third overspeed detection pattern so as not to be lower than the second overspeed detection pattern set by giving a second margin so as not to fall below the deceleration pattern in order to decelerate by the torque of the hoisting machine A third speeding detection pattern set by giving a margin and a fourth speeding detection pattern set by giving a fourth margin so as not to be less than the second speeding detection pattern, and the speed of the car is equal to both of the first and second speeding detection patterns. By operating the first braking device when the speed exceeds and the second braking device when the speed of the car exceeds the third and fourth overspeed detection patterns, There is an effect that an elevator safety system with good operating efficiency can be obtained without unnecessarily operating the braking device.

Claims (1)

In an elevator safety system having a measuring device for detecting an overspeed of a car of an elevator, and configured to operate at least one braking device according to the degree of the overspeed, The speeding detection pattern serving as the criterion for the speeding is made up of at least one pattern continuously varying according to the position of the car in the deceleration area near the end layer of the car, The speeding detection pattern is set such that the braking device does not operate unnecessarily even when there is a disturbance assumed during normal driving of the car or an error of the measuring device. Elevator safety system.

Images