CN103832906B - The control setup of elevator - Google Patents

Abstract

Provided is an elevator control device capable of decelerating an elevator car while appropriately suppressing rope slippage when an abnormality is detected. The control device of this elevator has: the sheave speed detecting part (12) of detecting the speed of sheave (2); The car speed detecting part (13) of detecting the speed of elevator car (5); The speed control part (15) of the speed deceleration of elevator car (5); The difference between the speeds of the elevator car (5) detected by the speed detection part (13) detects the rope slippage, and the speed control part (15) adjusts the elevator according to whether the rope slippage detection part (14) detects the rope slippage. The deceleration of the car (5).

Description

Elevator Controls

technical field

The present invention relates to, for example, a control device for controlling an elevator car of a traction type or the like.

Background technique

As background art in this technical field, Japanese Patent Laid-Open No. 2004-231355 (Patent Document 1) can be cited. The device disclosed in this publication has: a braking device 6, which applies a braking force to a sheave on which a sling connected to an elevator car is wound and driven by a motor to make the elevator car go up and down, Or release the braking force; detect the sheave speed detection part 7 of the sheave speed; detect the car speed detection part 8 of the car speed; When the cable slipping speed calculated from the difference between the wheel speed and the car speed is equal to or less than a predetermined value, the braking force control unit 13 controls the above-mentioned braking device so that it applies all the braking force. When the speed exceeds a predetermined value, the braking force control unit 13 controls the braking device to apply a braking force weaker than the entire braking force (see abstract).

prior art literature

patent documents

Patent Document 1 Japanese Patent Laid-Open No. 2004-231355

Contents of the invention

In the aforementioned Patent Document 1, the rope slipping speed is obtained from the difference between the sheave speed and the car speed, and when the rope slipping speed exceeds a predetermined value, a braking force weaker than the entire braking force is applied, to change the braking force. That is to say, the structure of this patent document 1 is only used to change the braking force during emergency braking. Although it can change the braking force when the elevator car in the ascending and descending is subjected to emergency braking, it cannot properly Inhibit the slippage of the sling.

Therefore, the present invention provides an elevator control device capable of decelerating an elevator car while appropriately suppressing rope slippage when an abnormality is detected.

solution

In order to solve the above-mentioned problems, the present invention provides a control device for an elevator having a driving device, a sheave driven by the driving device, a sling wound around the sheave, and an elevator car suspended by the sling. The control device of the elevator has: a sheave speed detection part for detecting the speed of the sheave; a car speed detection part for detecting the speed of the elevator car; when an abnormality is detected, the elevator car A speed control part for decelerating the speed of the speed; and a rope slip detection part, the rope slip detection part is based on the speed of the sheave detected by the sheave speed detection part and the speed detected by the car speed detection part The difference between the speeds of the elevator cars detects rope slippage, and the speed control section adjusts the deceleration of the elevator car according to whether the rope slippage is detected by the rope slippage detection section.

Invention effect

According to the present invention, when an abnormality is detected, the elevator car can be decelerated while appropriately suppressing rope slippage. In addition, problems, configurations, and effects other than those described above will be described in the description of the following embodiments.

Description of drawings

Fig. 1 is an overall configuration diagram of an elevator control device in a first embodiment of the present invention.

Fig. 2 is a flowchart showing the operation of the elevator control device in the above-mentioned first embodiment.

Fig. 3 is an overall configuration diagram of an elevator control device in a second embodiment of the present invention.

Fig. 4 is a flowchart showing the operation of the elevator control device in the above-mentioned second embodiment.

detailed description

Embodiments of the present invention will be described below with reference to the drawings.

first embodiment

(structure)

In a first embodiment, the deceleration of the elevator car is adjusted according to the slippage of the rope, regardless of how much time has elapsed since the deceleration of the elevator car started. Fig. 1 is an overall configuration diagram of an elevator control device in a first embodiment of the present invention.

As shown in FIG. 1 , the elevator according to this embodiment is a traction type elevator utilizing the frictional force between a rope and a sheave, and has a driving device 1 for driving the elevator up and down. A sheave 2 driven by the driving device 1 is installed on the rotating shaft of the driving device 1 . The main rope 3 is wound and attached to the upper side of the sheave 2 . One end side of the main rope 3 is connected to an elevator car 5 arranged to be movable up and down in the hoistway 4 , and the elevator car 5 is suspended and supported by the main rope 3 . In addition, the other end side of the main sling 3 is connected to the counterweight 6. In this embodiment, the driving device 1 is installed on the upper side of the hoistway 4, and is installed so that the main sling wound on the sheave 2 The two ends of 3 are located in the lifting passage 4. An encoder 7 serving as a rotational speed detection mechanism is attached to the sheave 2 , and the encoder 7 outputs pulses corresponding to the rotational speed of the sheave 2 . This encoder 7 is used to detect the absolute value of the moving position (displacement amount) of the elevator car 5 .

On the other hand, a speed governor 8 having drive wheels is installed on the upper side of the hoistway 4 . The speed governor rope 10 is wound on the drive wheel of the speed governor 8 and the pulley 9 installed on the lower side of the lifting passage 4 . Both ends of the speed governor rope 10 are connected to the elevator car 5, and circulate as the elevator car 5 moves up and down, so that the drive wheel of the speed governor 8 around which the speed governor rope 10 is wound rotates. . In addition, the speed governor 8 is equipped with an encoder 11 as a rotation speed detection mechanism, and the encoder 11 is used for detecting the speed governor 8 driving wheel speed. The encoder 11 generates and outputs a pulse signal corresponding to the ascending and descending speed of the elevator car 5 .

The respective encoders 7, 11 are connected to a control device 20 that controls the driving of the elevator car 5 to move up and down. The control device 20 has a sheave speed detection section 12 connected to the encoder 7 . The sheave speed detection section 12 inputs the pulse signal output from the encoder 7, and calculates and outputs the rotation speed of the sheave 2 based on the input pulse signal. Furthermore, the control device 20 has a car speed detection section 13 connected to the encoder 11 . The car speed detection section 13 inputs the pulse signal output from the encoder 11, and calculates and outputs the ascending and descending speed of the elevator car 5 based on the input pulse signal.

In addition, the control device 20 also has a rope slippage detection section 14 for detecting slippage of the main rope 3 . The rope slip detection part 14 inputs the speed of the sheave 2 detected in the sheave speed detection part 12 and the speed of the elevator car 5 detected in the car speed detection part 13 respectively, and detects the speed of the sheave 2. The difference between the speed and the speed of the elevator car 5 is compared with a predetermined value as a preset judgment value to judge whether or not the rope slips. Specifically, when the difference between the speed of the sheave 2 and the speed of the elevator car 5 is equal to or greater than a prescribed value, the rope slip detection section 14 judges that the rope slip has occurred, and when the difference is smaller than the prescribed value , the rope slip detection section 14 judges that no rope slip occurs.

In this embodiment, the predetermined value used when the rope slip detection section 14 compares the difference between the speed of the sheave 2 and the speed of the elevator car 5 is, for example, a fixed value such as 5 m/min. When determining the predetermined value, an abnormality in the speed of the elevator car 5 is experimentally caused, and the predetermined value is determined based on the test results at that time. Specifically, the predetermined value is determined from the standpoint of preventing errors from occurring in the respective encoders 7, 11, and when the predetermined value is actually determined, the difference when the main rope 3 slips and the rope slips occurs is measured, A value obtained by adding, for example, a margin of several percent to the worst value of the difference is determined as the predetermined value.

The control device 20 also has a speed control section 15 that controls the driving of the drive device 1 . The speed control section 15 controls such that the deceleration of the elevator car 5 varies according to the slippage of the main rope 3 . Specifically, the speed control part 15 inputs the judgment result of the rope slipping detection part 14 on whether there is rope slipping, and outputs to the driving device 1 the deceleration speed of the elevator car 5 according to the judgment result input. Increase or decrease the speed command value to control the drive of the drive device 1 .

In addition, the control device 20 further has a maximum allowable deceleration judging section 16 that judges whether or not the deceleration of the elevator car 5 has reached the maximum allowable deceleration of the elevator car 5 . The maximum allowable deceleration judged by this maximum allowable deceleration judging portion 16 is preset as when increasing the deceleration of the elevator car 5, the ride comfort of the elevator car 5 will not be affected by the increase of the deceleration. Significantly deteriorated, and will not cause damage to the various electrical components of the elevator due to the increase in the deceleration deceleration.

Specifically, when the speed control part 15 controls the driving device 1 to control the deceleration of the elevator car 5 through the driving device 1, the maximum allowable deceleration judging part 16 detects the deceleration of the elevator car 5. deceleration, and judge whether the detected deceleration of the elevator car 5 is above the predetermined maximum allowable deceleration. In addition, the maximum allowable deceleration judging section 16 may also be configured to detect the deceleration of the elevator car 5 based on the amount of change per unit time of the speed of the elevator car 5 detected by the car speed detecting section 13, and Based on the deceleration of the elevator car 5, it is judged whether the deceleration is above the maximum allowable deceleration.

(action)

The operation when the elevator car 5 is decelerated at a deceleration higher than normal due to an abnormality in the elevator will be described below with reference to FIG. 2 . Fig. 2 is a flowchart showing the operation of the elevator control device in the first embodiment.

First, during the period when the elevator car 5 in normal operation is moving up and down, when the car speed detection part 13 detects that the speed of the elevator car 5 is abnormal for some reason (step S0), the speed control Part 15 controls the driving device 1 so that the deceleration of the elevator car 5 becomes a predetermined deceleration larger than the normal time, and the speed of the elevator car 5 is started to decelerate, thereby reducing the speed of the elevator car 5. Rapid deceleration is performed (step S1).

At this time, in the rope slipping detection part 14, it is judged that the rotation speed of the sheave 2 detected by the sheave speed detection part 12 according to the pulse signal output by the encoder 7 is different from the pulse signal output by the car speed detection part 13 according to the encoder 11. Whether the difference between the lifting speed of the elevator car 5 detected by the signal is below the specified value, that is, it is judged whether the main rope 3 has a rope slippage (step S2)

When the difference detected by the rope slipping detection section 14 is equal to or less than a predetermined value, it is judged that there is no rope slippage, and the deceleration of the elevator car 5 is roughly increased by a predetermined value according to a predetermined ratio distribution (step S3). On the other hand, when the difference detected by the rope slip detector 14 is greater than a predetermined value, it is determined that rope slip has occurred, and the deceleration of the elevator car 5 is substantially reduced by a predetermined value (step S4).

In addition, when the deceleration of the elevator car 5 has been increased in the above-mentioned step S3, whether the deceleration of the elevator car 5 after the increase is judged in the maximum allowable deceleration judging section 16 is below the maximum allowable deceleration (step S5). Then, when the maximum allowable deceleration judging section 16 judges that the deceleration of the elevator car 5 is greater than the maximum allowable deceleration, the deceleration of the elevator car 5 is substantially reduced by a predetermined value (step S4).

On the other hand, when it is determined in the above step S5 that the deceleration of the elevator car 5 is below the maximum allowable deceleration, during the period from when the speed of the elevator car 5 starts to decelerate to when the running of the elevator car 5 stops, Return to above-mentioned step S2, and repeatedly carry out the processing of step S2 to step S5, to monitor the rope slippage situation of main rope 3, and control the increase or decrease of the deceleration of elevator car 5. At this time, when it is judged in the above-mentioned step S2 that the difference detected by the rope slip detection part 14 is below a predetermined value, and the rope does not slip, each time it is judged that there is no slip in the step S2, the In the above-mentioned step S3, the deceleration of the elevator car 5 is increased approximately by a predetermined value in proportion. That is to say, each time it is determined that there is no rope slipping in the above step S2, in the above step S3, the deceleration of the elevator car 5 is proportionally increased according to the predetermined proportion distribution.

Thereafter, before the speed of the elevator car 5 detected by the car speed detection part 13 through the encoder 11 reaches a predetermined speed, the deceleration of the elevator car 5 is increased repeatedly in the above step S2 to the above step S5. Decrease, so that the speed of the elevator car 5 changes. As a result, when the speed of the elevator car 5 becomes a predetermined speed, the drive device 1 is controlled by the speed control part 15, the deceleration of the elevator car 5 is set to 0, and the elevator car is driven according to the predetermined speed. The car 5 travels in the direction of travel as the direction of travel.

Afterwards, when the control device 1 detects a position detector (not shown) as a position detection part on the nearest floor where the elevator car 5 can stop, the drive device 1 is controlled by the speed control part 15 to control the drive device 1 to the elevator car 5. The speed of 5 is decelerated until the speed of the elevator car 5 detected by the car speed detection part 13 through the encoder 7 becomes 0, and the elevator car 5 is parked on the nearest floor (step S6).

(function and effect)

According to the above-mentioned first embodiment, when an abnormality such as abnormal speed occurs in the elevator, the speed of the sheave 2 is detected by the sheave speed detection part 12 according to the pulse signal output from the encoder 7, and the speed of the sheave 2 is detected by the car speed detection part 13 according to the pulse signal output from the encoder 7. The speed of the elevator car 5 is detected from the pulse signal output from the encoder 11 . In addition, it is judged whether the difference between the speed of the sheave 2 and the speed of the elevator car 5 is below an allowable predetermined value in the rope slip detection section 14, thereby judging whether the rope slip has occurred.

When the difference detected by the rope slip detection section 14 is equal to or less than a predetermined value, it is determined that no rope slip has occurred, and the deceleration of the elevator car 5 is increased by a predetermined value by a predetermined ratio. That is to say, in the case where rope slippage does not occur, the deceleration of the elevator car 5 can be increased, and the elevator car 5 can be decelerated at a faster speed. Accordingly, when an abnormality occurs, the elevator car 5 can be decelerated in a shorter time.

In addition, the wire slip detection section 14 continues to determine whether the wire slip has occurred, and the deceleration of the elevator car 5 is increased by a predetermined value each time the wire slip detection section 14 determines that there is no slip. As a result, the deceleration of the elevator car 5 can be proportionally increased in accordance with a predetermined ratio distribution every time it is determined that rope slippage has not occurred. Accordingly, the speed of the elevator car 5 can be appropriately decelerated in a shorter time.

On the other hand, when the difference detected by the rope slip detection unit 14 is greater than a predetermined value, it is determined that rope slip has occurred, and the deceleration of the elevator car 5 is substantially reduced by a predetermined value. That is to say, in the case of rope slippage, if the deceleration of the elevator car 5 is increased, the state of the rope slippage of the main rope 3 will further deteriorate, so that the speed of the elevator car 5 cannot be adjusted properly. to slow down. Therefore, when rope slippage occurs, the deceleration of the elevator car 5 is reduced to release the rope slippage state of the main rope 3, thereby decelerating the speed of the elevator car 5 in a more appropriate manner.

As a result, by judging the presence or absence of rope slippage based on the difference between the speed of the sheave 2 and the speed of the elevator car 5, the elevator is changed according to the situation of the rope slippage, that is, according to whether or not the rope slippage occurs. The deceleration of the car 5 is such that even if an abnormality such as an abnormal speed occurs in the elevator car 5 during travel and it is necessary to decelerate the elevator car 5 with a deceleration greater than the deceleration when it is normally stopped, it can 3, the occurrence of sling slipping can be suppressed in an appropriate manner, and at the same time, the speed of the elevator car 5 can be appropriately decelerated. Therefore, for example, in the case of using the main rope 3, which is superior in material durability but tends to slip during emergency braking, the elevator car 5 can be quickly and appropriately stopped at the nearest floor as the destination, and It is not necessary to make an emergency stop of the elevator car 5 by actuating an emergency brake or the like.

second embodiment

(structure)

In the above-mentioned first embodiment, the deceleration of the elevator car 5 is adjusted according to the slipping situation of the elevator car 5 regardless of how much time has elapsed since the deceleration of the elevator car 5, and as shown in Fig. 3 and Fig. 4 In the second embodiment, the deceleration of the elevator car 5 is not increased within a certain period of time starting from the speed of the elevator car 5 starting to decelerate. Fig. 3 is an overall configuration diagram of an elevator control device in a second embodiment of the present invention. With regard to the structure described in the above-mentioned first embodiment, repeated description thereof will be omitted here.

As shown in Figure 3, the control device 20 of the elevator involved in the second embodiment has a deceleration start time judging part 21, and the deceleration start time judging part 21 judges that the elevator car 5 from the control device 20 should Whether the speed starts to decelerate within the fixed time T1. Here, since the feedback value from the encoder 7 will exceed the command value issued by the speed control section 15 based on the initial set deceleration when the deceleration of the elevator car 5 is started (causing initial slippage), the deceleration start time The fixed time T1 as the prescribed time judged by the judging section 21 is a time for suppressing the feedback value from exceeding. Specifically, the fixed time T1 is, for example, approximately less than 1 second. When an abnormality such as an abnormal speed occurs in the elevator car 5 tentatively, the deceleration of the elevator car 5 will become larger than the command value from the speed control section 15 at the beginning of the deceleration of the elevator car 5, thereby causing The deceleration overspeed phenomenon occurs, and this fixed time T1 is a time for preventing the occurrence of rope slippage due to deceleration overspeed of the elevator car 5 .

(action)

The operation when the elevator car 5 is decelerated at a higher deceleration than normal due to an abnormality in the elevator will be described below with reference to FIG. 4 . Fig. 4 is a flowchart showing the operation of the elevator control device in the above-mentioned second embodiment. With regard to the operations described in the above-mentioned first embodiment, repeated description thereof will be omitted here.

First, when the car speed detection part 13 detects that the elevator car 5 has an abnormality such as speed abnormality for some reason (step S0), the speed control part 15 makes the deceleration of the elevator car 5 an initial setting. The mode control driving device 1 of deceleration makes the lifting speed of this elevator car 5 start to decelerate (step S1), after this, judges in this step S1 that the speed of elevator car 5 starts to decelerate in the deceleration start time judging part 21 Whether the elapsed time is within a certain time T1 (step S7).

When it is determined in this step S7 that the time elapsed after the speed of the elevator car 5 starts to decelerate is within a certain time T1, it is judged in the rope slip detection part 14 that the speed of the sheave 2 detected by the sheave speed detection part 12 is Whether the difference between the speed and the speed of the elevator car 5 detected by the car speed detecting section 13 is below a predetermined value, that is, it is judged whether rope slippage has occurred (step S8).

When it is determined in step S8 that the difference is equal to or less than the predetermined value, it is determined that rope slippage has not been detected, and the deceleration of the elevator car 5 is not increased or decreased, and the elevator car 5 is decelerated at the initially set deceleration. On the other hand, when it is judged in step S8 that the difference is greater than a predetermined value, it is detected that rope slippage has occurred, and the deceleration of the elevator car 5 is substantially reduced by a predetermined value as in step S4 (step S9). In the present embodiment, before it is judged in the above-mentioned step 7 that the fixed time T1 has elapsed from the time when the speed of the elevator car 5 starts to decelerate, the processing from the above-mentioned step S7 to the above-mentioned step S9 is repeated. During the period, the deceleration of the elevator car 5 is continuously reduced.

On the other hand, when it is judged in step S7 that the fixed time T1 has elapsed since the speed of the elevator car 5 started to decelerate, the process proceeds to step S2. After this, repeatedly carry out the increase and decrease of the deceleration of the elevator car 5 of this step S2 to this step S5, after the speed of this elevator car 5 becomes the prescribed speed determined in advance, enter step S6, and the elevator car 5 The deceleration is set to 0, and the elevator car 5 is made to stop at the nearest floor where the elevator car 5 can stop.

(function and effect)

According to the second embodiment described above, when an elevator abnormality is detected, the deceleration of the elevator car 5 is not increased until the fixed time T1 elapses after the speed control section 15 starts decelerating the speed of the elevator car 5 . In addition, by setting this fixed time T1 as the time that can suppress the feedback value from the encoder 7 from exceeding the command value from the speed control section 15 when the speed of the elevator car 5 is decelerated, it is possible to prevent the The deceleration of 5 becomes larger than the command value from the speed control section 15 when the deceleration of the elevator car 5 is just started, that is, the deceleration of the elevator car 5 exceeds the command value, and rope slippage occurs.

And until the fixed time T1 elapses, the cable slip detection section 14 repeatedly detects the cable slip, and when it is judged that the cable slip has occurred, the deceleration of the elevator car 5 is reduced, thereby suppressing the speed of the elevator car. The rope slip that may occur at the beginning of the deceleration of 5 can appropriately suppress the rope slip within the certain time T1.

The present invention is not limited to the above-described embodiments, and various modifications may be included. For example, the above-mentioned embodiments are used to describe the present invention in detail in an easy-to-understand manner, but it does not mean that the present invention must have all the described structures. In addition, some structures of one embodiment may be substituted for structures of other embodiments, and some structures of one embodiment may be added, deleted, or substituted with other structures.

Symbol Description

1 drive unit

2 sheaves

3 main slings (slings)

5 elevator cars

12 Sheave speed detection part

13 car speed detection part

14 Sling slip detection part

15 speed control section

20 control device

21 Deceleration start time judgment part

Claims (4)

1. a control setup for elevator, this elevator has actuating device, the rope sheave driven by this actuating device, the lift car that is wound on the hoist cable on this rope sheave and suspended in midair by this hoist cable, and the feature of the control setup of described elevator is to have:

Detect the rope sheave velocity measuring part of the speed of described rope sheave;

Detect the car speed test section of the speed of described lift car;

The speeds control part of the speed reduction of described lift car is made when exception being detected; And

Hoist cable skidding test section, the Differential Detection hoist cable between the speed of described hoist cable skidding test section divides the speed of the described rope sheave detected and described car speed test section to detect described lift car according to described rope sheave speed detecting portion skids,

According to described hoist cable skidding test section, whether described speeds control part detects that hoist cable skids and adjusts the deceleration/decel of described lift car,

Described speeds control part has time opening judgment part of slowing down, and described deceleration time opening judgment part judges whether described speeds control part have passed through specific time according to described abnormality detection after the speed of described lift car is reduced speed now,

Be judged as at the appointed time in described deceleration time opening judgment part, and when described hoist cable skidding test section detects that hoist cable skids, described speeds control part reduce the deceleration/decel of described lift car.

2. the control setup of elevator as claimed in claim 1, is characterized in that,

When described hoist cable skidding test section does not detect that hoist cable skids, described speeds control part increases the deceleration/decel of described lift car.

3. the control setup of elevator as claimed in claim 2, is characterized in that,

When each described hoist cable skidding test section does not detect that hoist cable skids, described speeds control part all increases the deceleration/decel of described lift car.

4. the control setup of the elevator as described in any one in claims 1 to 3, is characterized in that,

When described hoist cable skidding test section detects that hoist cable skids, described speeds control part reduces the deceleration/decel of described lift car.