JP2021115601A - Support roll abnormality detection method, and program - Google Patents

Abstract

To provide a technique capable of determining existence or absence of support roll abnormality more accurately.SOLUTION: According to changing a state of a specific support roll (for example, support roll 22A) of a plurality of supports rolls 22 (22A to 22 P) to one state of a first state and a second state, a detection result such that the specific support roll 22A is in one state is acquired from a sensor. Thereafter, at a time point when a prescribed time has lapsed from the detection result acquisition time point, the detection result of the sensor is acquired again, and on the basis of the re-acquired detection result, existence or absence of abnormality of the support roll 22A is determined. In detail, when a detection result such that the support roll 22A is in a state different from one state is acquired although the support roll 22A should maintain one state at the time point of re-acquisition of the detection result, it is determined that the support roll 22A is abnormal.SELECTED DRAWING: Figure 2

Description

The present invention relates to an abnormality detection method for a support roll capable of supporting a steel plate transported in a looper facility, and a technique related thereto.

For example, on the entrance and exit sides of a continuous processing line having a processing facility for processing steel sheets, such as a continuous pickling line, steel sheets (steel strips) can be stored (stocked) in a loop of multiple layers inside. Possible looper equipment is installed. For example, in the looper equipment on the entry side, when the transfer of the steel plate is temporarily stopped at the welded part or the like, the loop car is moved in the longitudinal direction of the steel plate to send the steel plate in the looper equipment to the processing equipment side and to the processing equipment. And steel sheets can be continuously supplied.

In such looper equipment, in order to prevent the steel plates of a plurality of layers from rubbing against each other and causing scratches on the steel plates, support rolls capable of supporting the steel plates are arranged at regular intervals in the longitudinal direction of the steel plates. (Refer to Patent Document 1 etc.). The support roll is configured to be switchable between a closed state in which the steel plate is supported and an open state in which the loop car is retracted so that the loop car can pass through. The support roll is also referred to as a swing roll or the like.

Japanese Unexamined Patent Publication No. 8-141639

By the way, if an abnormality occurs in the support roll when the loop car tries to pass through the position where the support roll is arranged, depending on the structure (mechanism) of the opening / closing operation of the support roll, the support column that supports the support roll may be used. There is a risk of an accident such as a fall.

Therefore, in the looper equipment, for example, as described below, the presence or absence of an abnormality in the support roll is determined using a sensor.

Specifically, when the loop car tries to pass the arrangement position of a certain support roll among a plurality of support rolls arranged along the longitudinal direction of the steel plate, the certain support roll is in the open state to the closed state (). Alternatively, when the state is switched from the closed state to the open state, the sensor detects that the certain support roll is in the closed state (or open state). Then, at this time, among the plurality of support roles, the state of the support role other than the certain support role (for example, whether or not the support role that should be closed at the present time is in the closed state (normal state), etc.) By checking, it is determined whether or not there is an abnormality in the support roll. Such an abnormality detection process is performed every time the loop car reaches the arrangement position (or the position immediately before) of each support roll and the state of each support roll is switched.

However, even when the presence or absence of an abnormality in the support roll is determined in this way, it may not be possible to accurately determine the presence or absence of an abnormality in the support roll due to various causes (described later).

Therefore, an object of the present invention is to provide a technique capable of more accurately determining the presence or absence of an abnormality in a support roll.

(1) A first loop car that reciprocates in the longitudinal direction of the steel plate while holding the steel plate, and a plurality of support rolls that are arranged along the longitudinal direction within the moving range of the loop car and support the steel plate. Looper equipment including a plurality of support rolls configured to be switchable between the state of the above and a second state retracted so that the loop car can pass, and a plurality of sensors capable of detecting the states of the plurality of support rolls. In the method for detecting an abnormality of a support roll in the above, a) the state of a specific support roll among the plurality of support rolls is switched to one of the first state and the second state. Accordingly, a step of acquiring the detection result that the specific support roll is in the one state from the sensor capable of detecting the state of the specific support roll among the plurality of sensors, and b) the step. When a predetermined time has elapsed from a), the presence or absence of an abnormality in the specific support roll is determined based on the step of reacquiring the detection result of the sensor and c) the detection result of the sensor in step b). Including the step of determining, in the step c), the specific support roll should maintain the one state at the time of the step b). When the detection result that the state is different from the one state is obtained from the sensor in the step b), it is determined that the specific support roll is abnormal. Detection method.

(2) The abnormality detection method according to (1) above, wherein the specific support roll is the support roll closest to the folding position of the loop car among the plurality of support rolls.

(3) In the above (2), d) the step of acquiring the first distance which is the distance between the position of the loop car and the reference position at the time of the step a), and e) the step at the time of the step b). Further including a step of acquiring a second distance which is a distance between the position of the loop car and the reference position, the loop car moves in a direction of reducing the storage amount of the steel plate in the looper equipment at the time of the step a). If so, the step c) is executed on the condition that the second distance is smaller than the first distance, and the loop car moves in the direction of increasing the storage amount at the time of the step a). If so, the step c) is an abnormality detection method, characterized in that the second distance is executed on the condition that the second distance is larger than the first distance.

(4) A first loop car that reciprocates in the longitudinal direction of the steel plate while holding the steel plate, and a plurality of support rolls that are arranged along the longitudinal direction within the moving range of the loop car to support the steel plate. Looper equipment including a plurality of support rolls configured to be switchable between the state of the above and a second state retracted so that the loop car can pass, and a plurality of sensors capable of detecting the states of the plurality of support rolls. In the computer that executes the support role abnormality detection process, a) the state of a specific support role among the plurality of support roles is switched to one of the first state and the second state. The step of acquiring the detection result that the specific support roll is in one of the states from the sensor capable of detecting the state of the specific support roll among the plurality of sensors, and b) When a predetermined time has elapsed from step a), the step of reacquiring the detection result of the sensor and c) the abnormality of the specific support roll based on the detection result of the sensor in step b). A program that executes a step of determining the presence or absence, and in the step c), the specific support role should maintain the one state at the time of the step b). Instead, when the detection result that the specific support roll is in a state different from the one state is obtained from the sensor in the step b), it is determined that the specific support roll is abnormal. A program characterized by that.

(5) The program according to (4) above, wherein the specific support roll is the support roll closest to the folding position of the loop car among the plurality of support rolls.

(6) In the above (5), the program d) acquires the first distance which is the distance between the position of the loop car and the reference position at the time of the step a), and e) the step b). The computer is further executed to acquire a second distance, which is the distance between the position of the loop car and the reference position at the time of step a), and the loop car is a steel plate in the looper facility at the time of step a). The step c) is executed on the condition that the second distance is smaller than the first distance, and the loop car is moved at the time of the step a). When moving in the direction of increasing the storage amount, the program c) is executed on the condition that the second distance is larger than the first distance.

According to the present invention, it is possible to more accurately determine the presence or absence of an abnormality in the support roll.

It is a figure which shows the schematic structure of the continuous pickling line. It is a top view which shows the schematic structure of the looper equipment. It is a block diagram which shows the structural example of a control system. It is a schematic diagram which shows the opening and closing operation of a support roll. It is a schematic diagram which shows the opening and closing operation of a support roll. It is a schematic diagram which shows the opening and closing operation of a support roll. It is a schematic diagram which shows the folding operation of a loop car. It is a flowchart about abnormality detection processing of a support role. It is a schematic diagram which shows the folding operation of the loop car which concerns on 2nd Embodiment. It is a schematic diagram which shows the folding operation of the loop car which concerns on 2nd Embodiment. It is a schematic diagram which shows the folding operation of the loop car which concerns on 2nd Embodiment. It is a schematic diagram which shows the folding operation of the loop car which concerns on 2nd Embodiment. It is a flowchart about abnormality detection processing of the support role which concerns on 2nd Embodiment. It is a flowchart about abnormality detection processing of the support role which concerns on 2nd Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<1. First Embodiment>
<1-1. Equipment overview ＞
FIG. 1 is a diagram showing a schematic configuration of a continuous pickling line (continuous pickling facility) 1 according to an embodiment of the present invention. Here, an embodiment in which the present invention is applied to the continuous pickling line 1 is exemplified, but the present invention is not limited to this, and it is applied to other continuous processing lines (continuous processing lines having a processing facility for processing the steel plate 2). The present invention may be applied.

In the continuous pickling line 1, first, the steel plate (steel strip) 2 wound in a coil shape is supplied to the continuous pickling line 1 by the payoff reel 11. The steel plate 2 supplied to the continuous pickling line 1 is cut by a shear after passing through the leveler 12, and the tip of the cut steel plate 2 and the tail end of the preceding steel plate 2 are welded at the welder 13. Then, the welded steel plate 2 is conveyed into the looper equipment 20 while being tensioned by the bridle roll 14 provided on the entrance side of the looper equipment 20 and the bridle roll 15 provided on the exit side of the looper equipment 20. (Through board).

The steel plate 2 conveyed into the looper equipment 20 is wound around a roll (also referred to as a looper roll) 26 and a fixed roll (a roll whose position is fixed) 27 on the loop car 21, and the looper roll 26 and the fixed roll 27 are wound. It is stored over a plurality of layers (here, 4 layers).

Then, the steel plate 2 is sent to the pickling tank 17 after passing through the scale breaker 16. Although not shown in FIG. 1, the pickled steel plate 2 in the pickling tank 17 is wound on a tension reel via a loop car on the exit side after passing through a water washing tank or the like.

<1-2. About looper equipment ＞
As shown in FIG. 1, in the looper equipment, the steel plate 2 is stored (stocked) in a loop shape of a plurality of layers. As a result, the looper equipment can store the steel plate 2 inside the looper equipment.

In the following, an embodiment in which the idea of the present invention is applied to the looper equipment (entry side looper equipment) 20 provided on the entrance side of the continuous pickling line 1 will be illustrated. The present invention is not limited to this, and the idea of the present invention may be applied to the looper equipment (not shown) provided on the exit side of the continuous pickling line 1.

In the looper equipment 20, the loop car 21 reciprocates in the longitudinal direction Y of the steel plate 2 while holding the steel plate 2, thereby adjusting the storage amount (also referred to as the loop amount) of the steel plate 2 in the looper equipment 20. NS.

For example, in order to reduce the storage amount of the steel plate 2 in the looper equipment 20, the loop car 21 is brought closer to the arrangement position of the fixed roll 27 (moved to the right in FIG. 1), and the storage amount of the steel plate 2 in the looper equipment 20 is reduced. When increasing the number, the loop car 21 is moved away from the arrangement position of the fixed roll 27 (moved to the left in FIG. 1).

FIG. 2 is a plan view showing a schematic configuration of the looper equipment 20.

The looper equipment 20 is arranged along the longitudinal direction Y within the moving range (movable range) of the loop car 21 and the loop car 21 that reciprocates in the longitudinal direction (moving direction) Y of the steel plate 2 while holding the steel plate 2. It is provided with a plurality of support rolls 22 (22A to 22P) to be formed. Further, in the looper equipment 20, a sensor 24 capable of detecting that the support roll 22 is in an open state (open mode) and a sensor 25 capable of detecting that the support roll 22 is in a closed state (closed mode). Two sensors are provided on each of the plurality of support rolls 22.

The wheels of the loop car 21 are connected to the drive device 29 via a wire 28, and the reciprocating movement of the loop car 21 is realized by the drive device 29.

Further, in the looper equipment 20, support rolls 22 capable of supporting the steel plate 2 (lower surface of the steel plate 2) are arranged at a predetermined interval in the longitudinal direction Y of the steel plate 2 within the moving range of the loop car 21. Has been done. By providing such a support roll 22, it is possible to prevent the steel plates 2 having a plurality of layers from rubbing against each other and causing scratches on the steel plates 2.

As shown in FIG. 2, here, a plurality of support rolls 22 (here, 16 support rolls 22A to 22P) are mounted on both sides (work side side and drive) of the steel plate 2 in the lateral direction X of the steel plate 2. It is arranged on each side (both sides with the side side). Each of the plurality of support rolls 22 is arranged in a plurality of stages at a position (height) capable of supporting the steel plates 2 (a plurality of layers of steel plates 2) laminated in a loop shape.

Of the plurality of support rolls 22A to 22P, the support roll 22A is the support roll 22 closest to the maximum loop point P100 (located at the position closest to the point P100), and the support roll 22P is the minimum loop point. The latest support roll 22 of P200. The maximum loop point P100 is a point on one side of the loop car 21 in the moving direction (Y direction), and is a point where the stored amount of the steel plate 2 in the looper equipment 20 becomes the maximum amount. The minimum loop point P200 is a point on the other side of the movement direction of the loop car 21, and is a point where the stored amount is the minimum amount.

The support roll 22 is configured to be switchable between a state in which the steel plate 2 is supported (supported state) and a state in which the loop car 21 is retracted so that the loop car 21 can pass through (retracted state).

Here, the support state is a state in which the support roll 22 is extended in a direction perpendicular to the longitudinal direction Y of the steel plate 2 (direction of 90 degrees), and is also referred to as a “closed state”. Further, the retracted state is a state in which the support roll 22 is extended in a direction parallel to the longitudinal direction Y of the steel plate 2 (direction of 0 degrees), and is also referred to as an “open state”. Note that FIG. 2 shows a situation in which the support rolls 22A and 22B are in the open state (retracted state) and the support rolls 22D and 22P are in the closed state (supported state).

The state of the support roll 22 is switched by turning (rotating) the support roll 22 in a horizontal plane with the arrival of the loop car 21 at the arrangement position of the support roll 22 or the position immediately before the arrangement position. The support roll 22 that swivels in a horizontal plane is also referred to as a swing roll or the like. The opening / closing operation (state switching operation) of the support roll 22 will be described later.

Here, the support roll 22 is rotated in the horizontal plane to switch between the support state (closed state) and the retracted state (open state), but the present invention is not limited to this. For example, the support roll 22 extending in the lateral direction X of the steel plate 2 may be reciprocated in the lateral direction X to switch between the support state and the retracted state.

Further, as described above, the looper equipment 20 has two sensors, a sensor 24 that can detect that the support roll 22 is in the open state, and a sensor 25 that can detect that the support roll 22 is in the closed state. Is provided for each of the plurality of support rolls 22. Examples of these sensors 24 and 25 include proximity sensors capable of detecting that an object is close to a certain range.

For example, when the support roll 22 is switched from the closed state to the open state and one end of the support roll 22 (one end on the rotation axis side) approaches the proximity sensor 24, the proximity sensor 24 causes the support roll 22 to move. Detects that it is in the open state. At this time, the proximity sensor 25 detects that the support roll 22 is not in the closed state. On the contrary, when one end of the support roll 22 approaches the proximity sensor 25 due to the support roll 22 being switched from the open state to the closed state, the proximity sensor 25 detects that the support roll 22 is in the closed state. do. At this time, the proximity sensor 24 detects that the support roll 22 is not in the open state.

Further, the looper equipment 20 is provided with a computer 99 that manages the looper equipment 20. The computer 99 executes an abnormality detection process of the support roll 22 and the like.

FIG. 3 is a block diagram showing a configuration example of the control system.

The computer 99 includes a controller (control unit) 90.

The controller 90 is a control device that is built in the computer 99 and controls the computer 99 in an integrated manner. The controller 90 is configured as a computer system including a CPU and various semiconductor memories (RAM and ROM). The controller 90 realizes various processing units by executing a predetermined program (OS, application, etc.) stored in the storage unit (semiconductor memory, etc.) in the CPU.

As shown in FIG. 3, the controller 90 realizes various processing units including the acquisition unit 91, the determination unit 92, and the operation control unit 93 by executing the program.

The acquisition unit 91 is a processing unit that acquires the detection results of the proximity sensors 24 and 25 from the proximity sensors 24 and 25.

The determination unit 92 is a processing unit that executes various determination operations.

The operation control unit 93 is a processing unit that controls the operation (reciprocating movement operation, stop operation, etc.) of the loop car 21 in cooperation with the drive device 29.

<1-3. About opening and closing operation of support roll ＞
4 to 6 are schematic views showing an opening / closing operation (state switching operation) of the support roll 22. The opening / closing operation of the support roll 22 will be described with reference to FIGS. 4 to 6. In FIGS. 5 and 6, the looper roll 26 (and the steel plate 2) is not arranged on the loop car 21 for convenience of illustration, but in reality, the looper roll 26 (and the steel plate 2) is placed on the loop car 21. Is located in.

First, a situation in which the loop car 21 moves in a direction for reducing the storage amount of the steel plate 2 in the looper equipment 20 (direction in the right direction in FIG. 1) (a situation in which the state of the support roll 22 is switched from the closed state to the open state) will be described.

The looper equipment 20 is provided with a support column (a support column extending in the vertical direction) 23 that pivotally supports the support roll 22, and the support roll 22 can rotate in a horizontal plane with the support roll 23 as a rotation axis. be.

Then, as described below, when the loop car 21 reaches the position immediately before the arrangement position of the closed support roll 22, the state of the support roll 22 is switched from the closed state to the open state in the order of FIGS. 4, 5, and 6. Be done.

Specifically, in the support column 23, a cam follower 32 is provided via the link mechanism 31, and a cam groove 34 is provided on the side surface of the loop car 21. Then, as shown in FIG. 4, when the loop car 21 reaches the position immediately before the arrangement position of the support roll 22 in the closed state (specifically, the support column 23 that pivotally supports the support roll 22), the cam follow-up on the support roll 23 side. The child 32 fits into the cam groove 34 on the loop car 21 side.

After that, when the loop car 21 moves to the right from the position of FIG. 4, as shown in FIG. 5, the cam follower 32 on the support column 23 side gradually rises along the cam groove 34 on the loop car 21 side, and the link mechanism 31 The tip of the moves to the right. The support column 23 is provided with a rotation mechanism 33 that rotates in response to pushing and pulling of the link mechanism 31, and when the link mechanism 31 pushes (moves) the rotation mechanism 33 to the right side (moves), the rotation mechanism 33 moves the support column 23. Rotates around the axis of rotation of. In response to this, the support column 23 gradually rotates around the rotation axis of the support column 23, and the support roll 22 gradually rotates around the rotation axis as the support column 23 rotates.

Then, when the loop car 21 moves further to the right from the position of FIG. 5, as shown in FIG. 6, the cam follower 32 on the support column 23 side further rises along the cam groove 34 on the loop car 21 side, and the support column 23 Rotation mechanism 33 is pushed further to the right. In response to this, the support column 23 further rotates around the rotation axis of the support column 23, and the support roll 22 further rotates around the rotation axis of the support column 23 as the support column 23 rotates.

In this way, the support roll 22 is switched from the closed state (FIG. 4) to the open state (FIG. 6).

Next, a situation in which the loop car 21 moves in a direction to increase the storage amount of the steel plate 2 in the looper equipment 20 (to the left in FIG. 1) (a situation in which the state of the support roll 22 is switched from the open state to the closed state) will be described.

In this case, an operation opposite to the above operation (operation in the order of FIGS. 6, 5 and 4) is performed.

Specifically, when the loop car 21 reaches the arrangement position of the support roll 22 in the open state, the cam follower 32 on the support column 23 side fits into the cam groove 34 on the loop car 21 side (see FIG. 6). Then, as the loop car 21 moves (moves to the left), the cam follower 32 on the support column 23 side descends along the cam groove 34 on the loop car 21 side (see FIGS. 5 and 4), and the rotation mechanism of the support column 23 33 is pulled out to the left by the link mechanism 31. In response to this, the support column 23 and the support roll 22 rotate about the rotation axis of the support column 23 (see FIGS. 5 and 4).

In this way, the support roll 22 is switched from the open state (FIG. 6) to the closed state (FIG. 4).

<1-4. About support role abnormality judgment processing>
Next, the abnormality determination process of the support roll 22 will be described.

Here, in determining the presence or absence of an abnormality in the support roll 22 (whether or not the support roll 22 has a normal angle in the horizontal plane), it is conceivable to use the following three types of abnormality determination processes.

<First type of abnormality determination processing>
In the first type of abnormality determination process, when the state of a certain support roll 22 among the plurality of support rolls 22 (22A to 22P) is switched, the presence or absence of an abnormality in the other support roll 22 is determined. ..

Here, a situation in which the state of the support roll 22C (FIG. 2) among the plurality of support rolls 22A to 22P is switched from the closed state to the open state is illustrated.

When the loop car 21 reaches a position immediately before the arrangement position of the support roll 22C in the closed state, the above opening / closing operation is performed to switch the state of the support roll 22C from the closed state to the open state. In response to this, the detection result that the state of the support roll 22C is in the open state is acquired from the proximity sensor 24 of the support roll 22C. In the first type of abnormality determination processing, at this time, among the plurality of support rolls 22A to 22P, the support rolls 22 (that is, the support roll 22A) other than the support roll 22C (the support roll 22 whose state has been switched) are not included. , 22B, 22D to 22P) is confirmed (determined).

Specifically, the state detection results of each support roll 22 are acquired from the proximity sensors 24 and 25 of the support rolls 22 other than the support roll 22C. Then, it is determined whether or not the support roll 22 (for example, the support rolls 22A and 22B in FIG. 2) that should be in the open state at the present time is in the open state (normal state). Similarly, it is determined whether or not the support roll 22 (for example, the support rolls 22D to 22P in FIG. 2) that should be in the closed state at the present time is in the closed state (normal state).

In such an abnormality determination process (first type of abnormality determination process), every time the loop car 21 reaches the arrangement position (or the position immediately before) of each support roll 22, the state of each support roll 22 is switched. It is done in.

According to this, for example, even if an abnormality occurs in the support roll 22C immediately after the state of the support roll 22C is switched from the closed state to the open state, the support roll 22D next to the support roll 22C after that. When the loop car 21 reaches the position immediately before the placement position and the state of the next support roll 22D is switched, the state of the support roll 22C is confirmed. Therefore, it is possible to detect an abnormality of the support roll 22C (an abnormality occurring in another support roll 22 when the state of a certain support roll 22 is switched).

<Second type of abnormality determination processing>
In the second type of abnormality determination process, it is determined whether or not the states of the support rolls 22 on both sides (both sides of the work side and the drive side) of the steel plate 2 in the lateral direction X are switched at substantially the same timing. Will be done.

Specifically, when the states of the support rolls 22 on both sides of the steel plate 2 are switched at substantially the same timing, it is determined that the support rolls 22 are normal. On the other hand, when the states of the support rolls 22 on both sides of the steel plate 2 are switched at different timings, it is determined that the support rolls 22 are abnormal.

<Third type of abnormality judgment processing>
In the third type of abnormality determination process, the detection result that the support roll 22 is in the open state (detection result from the proximity sensor 24) and the detection result that the support roll 22 is in the closed state (from the proximity sensor 25). It is determined whether or not the detection result) is acquired at the same time.

Specifically, when only one of the detection result that the support roll 22 is in the open state and the detection result that the support roll 22 is in the closed state is acquired, the support roll 22 is normal. The fact is judged. On the other hand, if the detection result that the support roll 22 is in the open state and the detection result that the support roll 22 is in the closed state are acquired at the same time for some reason, it means that the support roll 22 is abnormal. It is judged.

It is conceivable to determine the presence or absence of an abnormality in the support roll 22 by using these three types of abnormality determination processes.

However, it may not be possible to accurately determine the presence or absence of an abnormality in the support roll only by such an abnormality determination process (particularly, the first type of abnormality determination process). This point will be described with reference to FIG. Note that FIG. 7 shows a folding operation when the folding position P50 of the loop car 21 is the maximum loop point P100.

Specifically, as shown in FIG. 7A, when the loop car 21 moving to the left reaches the placement position of the support roll 22A (the nearest support roll of the maximum loop point P100), the support roll 22A is released. It rotates 90 degrees in the horizontal plane and transitions from the open state to the closed state. Then, the loop car 21 passes through the arrangement position of the support roll 22A and further moves to the left side (maximum loop point P100 side).

At this time, for some reason, the support roll 22A may rotate 90 degrees or more with respect to the longitudinal direction Y instead of staying at an angle of 90 degrees with respect to the longitudinal direction Y (see FIG. 7B). ..

In this case, in the first type of abnormality determination processing, the loop car 21 returns to the arrangement position of the support roll 22A without detecting the abnormality of the support roll 22A (see FIG. 7C).

Specifically, in the first type of abnormality determination processing, when the loop car 21 reaches the arrangement position of a certain support roll 22 and the state of the certain support roll 22 is switched, the other support roll 22 Until the abnormality is confirmed and the loop car 21 reaches the position where the next support roll 22 is arranged, the presence or absence of the abnormality of the certain support roll 22 is not confirmed. Therefore, if an abnormality occurs in the support roll 22A immediately after the loop car 21 reaches the arrangement position of the support roll 22A and the state of the support roll 22A is switched, the abnormality of the support roll 22A remains undetected. The loop car 21 returns to the position where the support roll 22A is arranged. In short, when the support roll 22 next to the support roll 22A is the support roll 22A itself, even if an abnormality occurs in the support roll 22A, the loop car 21 moves the support roll 22A without detecting the abnormality. It reaches the placement position.

As a result, as described below, there is a risk that the loop car 21 may collide with the support column 23 of the support roll 22A (see FIG. 7C) and the support column 23 may fall over.

Specifically, when the loop car 21 reaches the position immediately before the placement position of the support roll 22A from the left side of FIG. 7C via the turn-back position P50 (here, the maximum loop point P100), the support is originally concerned. The roll 22A is in the closed state. As a result, the cam follower 32 on the support column 23 side is fitted into the cam groove 34 on the loop car 21 side by the mechanism as described above, and the support roll 22A rotates about the rotation axis of the support column 23.

However, when the support roll 22A, which should be in the originally closed state, is not in the closed state (see FIG. 7B), the height of the cam follower 32 on the support column 23 side and the height of the cam groove 34 on the loop car 21 side do not match. , The cam follower 32 collides with the loop car 21. As a result, the support column 23 may fall over.

When such an accident occurs, the continuous pickling line 1 may be temporarily stopped in order to return the fallen support column 23 to the original state, and the production efficiency may decrease. Further, if some of the equipment is damaged due to the support column 23 falling over, the continuous pickling line 1 may be stopped until the continuous pickling line 1 is restored, and the production efficiency may be significantly reduced.

In order to prevent the occurrence of such an accident, in the looper equipment 20, in addition to the above three types of abnormality determination processing (particularly, the first type of abnormality determination processing), the following abnormality determination processing (fourth) (Type of abnormality determination processing) is also executed.

FIG. 8 is a flowchart relating to the abnormality determination process (fourth type of abnormality determination process) of the support roll 22. The operation of FIG. 8 is executed by the computer 99.

Here, an operation at the time of turning back of the loop car 21, particularly, a turning operation when the turning position P50 of the loop car 21 is between the arrangement position of the support roll 22A and the maximum loop point P100 will be illustrated.

In this case, in the operation of FIG. 8, among the plurality of support rolls 22A to 22P, the support roll 22A (before the loop car 21 reaches the folding position P50) closest to the folding position P50 of the loop car 21 (here, the maximum loop point P100). It is determined whether or not there is an abnormality in the support roll 22) that passed last.

Specifically, when the loop car 21 reaches the arrangement position of the support roll 22A, the support roll 22A is switched from the open state to the closed state (see FIG. 7A). In response to this, the detection result that the support roll 22A is in the closed state is acquired from the proximity sensor 25 of the support roll 22A, and it is detected that the state of the support roll 22A has been switched (step S11). Then, the process proceeds from step S11 in FIG. 8 to step S12.

In step S12, the computer 99 starts timing the timer and waits for the elapse of the predetermined time T1 (for example, 1 second). The predetermined time T1 can be changed and is set in advance by the administrator of the continuous pickling line 1.

Then, when a predetermined time T1 elapses after the detection result indicating that the support roll 22A is in the closed state is acquired in step S11, the process proceeds from step S12 to step S13.

In step S13, the computer 99 acquires the detection result of the proximity sensor 25 again.

Then, in step S14, the computer 99 determines whether or not the support roll 22A maintains the state at the time of step S11 (here, the closed state (see FIG. 7A)). Here, the distance between the arrangement position of the support roll 22A and the maximum loop point P100 (folding position P50) is longer than a certain degree, and a predetermined time T1 (1) after the loop car 21 passes the arrangement position of the support roll 22A. It is assumed that the loop car 21 has not yet returned to the position where the support roll 22A is arranged when the second) has elapsed.

For example, when the detection result indicating that the support roll 22A is in the closed state is reacquired from the proximity sensor 25 in step S13, the support roll 22A, which should be in the closed state, maintains the closed state (normal state). That is determined in step S14. Then, the process proceeds from step S14 to step S16, and it is determined that the support roll 22A is normal.

On the other hand, when the support roll 22A transitions to a state different from the closed state (see FIG. 7B) between steps S11 and S13, the detection result that the support roll 22A is not in the closed state is the detection result in step S13. Is acquired from the proximity sensor 25 at.

Although the support roll 22A should be kept in the closed state at the time of step S13, when the detection result that the support roll 22A is not in the closed state is acquired in step S13, the support roll 22A is closed. It is determined in step S14 that the state is not maintained, and the process proceeds from step S14 to step S15.

Then, in step S15, it is determined that the support roll 22A is abnormal. When it is determined that the support roll 22 (22A in this case) is abnormal, a movement stop command is transmitted from the computer 99 to the drive device 29 (FIG. 2) of the loop car 21, and the movement operation of the loop car 21 is stopped.

According to the above operation, for example, when the support roll 22A transitions to a state (abnormal state) different from the closed state immediately after the support roll 22A is switched to the closed state (FIG. 7B). (See), it is possible to determine (detect) that the support roll 22A is abnormal. Therefore, it is possible to more accurately determine the presence or absence of an abnormality in the support roll 22.

<2. Second Embodiment>
The second embodiment is a modification of the first embodiment. Hereinafter, the differences from the first embodiment will be mainly described.

In this second embodiment, in addition to the operation of the first embodiment, whether or not to execute the abnormality determination process of the support roll 22 is determined in consideration of the position of the loop car 21.

FIG. 9 is a schematic view showing a folding operation of the loop car 21.

Here, the folding position P50 of the loop car 21 is changed according to the situation of the continuous pickling line 1 and the like. Therefore, depending on the folding position P50 of the loop car 21, a predetermined time T1 (for example, 1 second) has elapsed since the loop car 21 reached the arrangement position of the support roll 22A on the maximum loop point P100 side, as shown in FIG. In the meantime, the loop car 21 may have already returned to the position where the support roll 22A is arranged.

For example, after the loop car 21 has passed the arrangement position of the support roll 22A, before the cam follower 32 on the support roll 22A support column 23 side is disengaged from the cam groove 34 on the loop car 21 side (a state in which the cam follower 32 is still fitted in the cam groove 34). The loop car 21 may turn back. In this case, before the predetermined time T1 elapses after the state of the support roll 22A is switched to the closed state (FIG. 9A), the state of the support roll 22A is switched to the open state as a normal operation (FIG. 9). 9 (b)).

In such a case, when it is determined whether or not the support roll 22A is maintained in the closed state when the predetermined time T1 elapses (step S14 in FIG. 8), even though the support roll 22A is normal. , It is determined (that is, erroneous determination) that the support roll 22A is abnormal. As a result, the loop car 21 may be stopped unnecessarily, and the production efficiency of the continuous pickling line 1 may decrease.

The same applies to the support roll 22P on the minimum loop point P200 side. Specifically, when the time from when the state of the support roll 22P is switched to the open state to when it is switched to the closed state again is less than or equal to the predetermined time T1, the support roll 22P is brought into the open state when the predetermined time T1 elapses. When it is determined whether or not the support roll 22P is maintained, it is determined (erroneous determination) that the support roll 22P is abnormal even though the support roll 22P is normal.

In order to prevent such an erroneous determination, in the second embodiment, the position P1 of the loop car 21 at the time when the state of the support roll 22 closest to the folding position P50 of the loop car 21 is switched, and then T1 for a predetermined time. By comparing with the position P2 of the loop car 21 at the time when the above has elapsed, it is determined whether or not to execute the abnormality determination process of the support roll 22.

13 and 14 are flowcharts relating to the abnormality determination process (fourth type of abnormality determination process) according to the second embodiment.

The operation of FIG. 13 is executed when the loop car 21 moves in the direction of increasing the storage capacity of the steel plate 2 in the looper equipment 20 (to the left in FIG. 1), and the operation of FIG. 14 is the operation of the steel plate 2 in the looper equipment 20. This is executed when the loop car 21 moves in the direction of reducing the storage amount (to the right in FIG. 1).

As shown in FIGS. 13 and 14, in this second embodiment, in addition to the operation of FIG. 8 (steps S11 to S16), the processes of steps S21 to S23 are executed. Hereinafter, the processes of steps S21 to S23 will be mainly described.

First, the operation when the loop car 21 moves in the direction of increasing the storage amount of the steel plate 2 in the looper equipment 20 will be described with reference to FIGS. 9, 10 and 13. Here, it is assumed that the folding position P50 of the loop car 21 is between the arrangement position of the support roll 22A and the maximum loop point P100. The folding position P50 of the loop car 21 may be between the two support rolls 22 without being limited to this.

As shown in FIGS. 9A and 10A, when the loop car 21 moving to the left reaches the arrangement position of the support roll 22A (the support roll closest to the folding position P50), the support roll 22 is opened. It can be switched from the state to the closed state. In response to this, the detection result indicating that the support roll 22A is in the closed state is acquired from the proximity sensor 25 (step S11). Then, the process proceeds from step S11 to step S21.

In step S21, the distance (first distance) L1 between the position P1 of the loop car 21 and the reference position P0 at the time of step S11 (the time when the detection result indicating that the support roll 22A is closed) is obtained. To be acquired. As the reference position P0, for example, the minimum loop point P200 is used.

After that, when the predetermined time T1 elapses (step S12), the detection result of the proximity sensor 25 is acquired again (step S13), and at the time of step S13 (when the detection result of the proximity sensor 25 is reacquired). The distance (second distance) L2 between the position P2 of the loop car 21 and the reference position P0 is acquired (step S22).

Then, the process proceeds from step S22 to step S23A (S23), and it is determined whether or not the distance L2 is larger than the distance L1. In other words, it is determined whether or not the stored amount at the time of step S13 is larger than the stored amount at the time of step S11.

For example, when the loop car 21 has not yet returned to the arrangement position of the support roll 22A when T1 elapses after the loop car 21 has passed the arrangement position of the support roll 22A (see FIG. 10B). The position P2 of the loop car 21 at the time of step S13 is on the left side (maximum loop point P100 side) of the position P1 (FIG. 10A) of the loop car 21 at the time of step S11. In this case, it is determined in step S23A that the distance L2 is larger than the distance L1, and the process proceeds from step S23A to step S14 and thereafter. Then, in the same manner as in the first embodiment, the abnormality determination process of the support roll 22A (the process of determining whether or not the support roll 22A maintains the state in step S11) is executed.

On the other hand, when the loop car 21 has returned to the arrangement position of the support roll 22A when the predetermined time T1 has elapsed after the loop car 21 has passed the arrangement position of the support roll 22A (see FIG. 9B). The position P2 of the loop car 21 at the time of step S13 is the same position as the position P1 (FIG. 9A) of the loop car 21 at the time of step S11. In this case, it is determined in step S23 that the distance L2 is equal to or less than the distance L1, and the operation of FIG. 13 is performed without going through the processes of steps S14 to S16 (without executing the abnormality determination process of the support roll 22). Is finished.

As described above, when the loop car 21 is moving in the direction of increasing the storage amount of the steel plate 2 in the looper equipment 20 at the time of step S11, the condition is that the second distance L2 is larger than the first distance L1. , The abnormality determination process (steps S14 to S16) of the support roll 22 is executed.

Next, the operation when the loop car 21 moves in the direction of reducing the storage amount of the steel plate 2 in the looper equipment 20 will be described with reference to FIGS. 11, 12, and 14.

Note that the processing content of step S23 is different between FIGS. 13 and 14, and the processing content other than step S23 is the same. Hereinafter, the processing content of step S23B (S23) of FIG. 14 will be mainly described.

When the loop car 21 moves in a direction of reducing the storage amount of the steel plate 2 in the looper equipment 20, in step S23B (S23), it is determined whether or not the second distance L2 is smaller than the first distance L1. In other words, it is determined whether or not the stored amount at the time of step S13 is smaller than the stored amount at the time of step S11.

For example, when the loop car 21 has not yet returned to the arrangement position of the support roll 22P when T1 elapses after the loop car 21 has passed the arrangement position of the support roll 22P (see FIG. 12B). The position P2 of the loop car 21 at the time of step S13 is on the right side (reference position P0 side) of the position P1 (FIG. 12A) of the loop car 21 at the time of step S11. In this case, it is determined in step S23B that the distance L2 is smaller than the distance L1, and the process proceeds from step S23B to step S14 and thereafter. Then, the abnormality determination process of the support roll 22P is executed.

On the other hand, when the loop car 21 returns to the arrangement position of the support roll 22P when T1 elapses for a predetermined time after the loop car 21 has passed the arrangement position of the support roll 22P (see FIG. 11B). The position P2 of the loop car 21 at the time of step S13 is the same position as the position P1 (FIG. 11 (a)) of the loop car 21 at the time of step S11. In this case, it is determined in step S23B that the distance L2 is equal to or greater than the distance L1, and the operation of FIG. 14 is performed without going through the processes of steps S14 to S16 (without executing the abnormality determination process of the support roll 22). Is finished.

In this way, when the loop car 21 is moving in the direction of reducing the storage amount of the steel plate 2 in the looper equipment 20 (to the right in FIG. 1) at the time of step S11, the second distance L2 is larger than the first distance L1. The abnormality determination process (steps S14 to S16) of the support roll 22 is executed on condition that the size is small.

According to the above operation, the loop car 21 is placed at the position where the support roll 22 is arranged between the time when the state of the support roll 22 closest to the folding position P50 of the loop car 21 is switched and the time T1 elapses. When the support roll 22 returns and the state of the support roll 22 is switched again (as a normal operation), the abnormality determination process of the support roll 22 is not executed. Therefore, it is possible to prevent the support roll 22 closest to the folding position P50 of the loop car 21 from being erroneously determined to be abnormal even though it is normal. As a result, it is possible to prevent a decrease in the production efficiency of the continuous pickling line 1.

According to the embodiments described above, the following inventions can be provided.

First, the first abnormality detection method of the support role is
A loop car (for example, a loop car 21) that reciprocates in the longitudinal direction of the steel plate while holding the steel plate,
A plurality of support rolls arranged along the longitudinal direction within the moving range of the loop car, and can be switched between a first state of supporting the steel plate and a second state of retracting so that the loop car can pass through. A plurality of support roles (for example, a plurality of support roles 22) configured in
A plurality of sensors (for example, a plurality of proximity sensors 25) capable of detecting the state of the plurality of support rolls, and
This is the first abnormality detection method for the support roll in the looper equipment provided with the above.
a) The state of a specific support roll among the plurality of support rolls is switched to one of the first state (for example, the open state) and the second state (for example, the closed state). In response to this, a step of acquiring a detection result indicating that the specific support roll is in one of the states from a sensor capable of detecting the state of the specific support roll among the plurality of sensors (for example, step S11). )When,
b) A step (for example, step S13) of reacquiring the detection result of the sensor when a predetermined time has elapsed from the step a).
c) A step (for example, steps S14 to S16) of determining the presence or absence of an abnormality in the specific support roll based on the detection result of the sensor in the step b).
Including
In the step c), the specific support roll is different from the one state even though the specific support roll should maintain the one state at the time of the step b). When the detection result of the state is acquired from the sensor in the step b), it is determined that the specific support roll is abnormal.

According to the above-mentioned first abnormality detection method, immediately after the specific support roll is switched to one of the first state and the second state, the specific support role is changed to the one state. Can determine that the specific support role is abnormal even when the state has changed to a different state, so that it is possible to more accurately determine the presence or absence of an abnormality in the support role.

The second abnormality detection method is the first abnormality detection method.
The specific support roll is characterized in that, of the plurality of support rolls, the support roll closest to the folding position of the loop car (for example, the support roll 22A).

The third abnormality detection method is the second abnormality detection method.
d) A step (for example, step S21) of acquiring a first distance (for example, a distance L1) which is a distance between the position of the loop car and a reference position at the time of the step a).
e) A step (for example, step S22) of acquiring a second distance (for example, a distance L2) which is a distance between the position of the loop car and the reference position at the time of the step b).
Including
If the loop car is moving in a direction to reduce the storage amount of the steel plate in the looper equipment at the time of the step a), the second distance is smaller than the first distance in the step c). Is executed on condition
When the loop car is moving in the direction of increasing the storage amount at the time of the step a), the step c) is executed on condition that the second distance is larger than the first distance. It is characterized by that.

According to the third abnormality detection method, the loop car returns to the position where the support roll is arranged and the loop car returns to the position where the support roll is arranged within a predetermined time after the state of the support roll closest to the folding position of the loop car is switched. If the status of the support role is switched again as a normal operation, the error determination process of the support role is not executed. Therefore, it is possible to prevent the support roll closest to the folding position of the loop car from being erroneously determined to be abnormal even though it is normal.

Although the present invention is described in the above preferred embodiment, the present invention is not limited thereto. Various embodiments are possible that do not deviate from the spirit and scope of the invention.

1 Continuous pickling line 2 Steel plate 20 Looper equipment 21 Loop car 22 Support roll 23 Strut 24,25 Proximity sensor

Claims (6)

A loop car that reciprocates in the longitudinal direction of the steel plate while holding the steel plate,
A plurality of support rolls arranged along the longitudinal direction within the moving range of the loop car, and can be switched between a first state of supporting the steel plate and a second state of retracting so that the loop car can pass through. With multiple support roles configured in
A plurality of sensors capable of detecting the status of the plurality of support rolls, and
This is a method for detecting abnormalities in support rolls in looper equipment equipped with.
a) The specific support roll changes in response to the change of the state of the specific support roll among the plurality of support rolls to one of the first state and the second state. A step of acquiring a detection result indicating that one of the states is present from a sensor capable of detecting the state of the specific support roll among the plurality of sensors, and a step of obtaining the detection result.
b) A step of reacquiring the detection result of the sensor when a predetermined time has elapsed from the step a), and
c) A step of determining the presence or absence of an abnormality in the specific support roll based on the detection result of the sensor in the step b).
Including
In the step c), the specific support roll is different from the one state even though the specific support roll should maintain the one state at the time of the step b). An abnormality detection method characterized in that when a detection result indicating that a state is obtained is acquired from the sensor in step b), it is determined that the specific support roll is abnormal. In the abnormality detection method according to claim 1,
An abnormality detection method, wherein the specific support roll is the support roll closest to the folding position of the loop car among the plurality of support rolls. In the abnormality detection method according to claim 2,
d) The step of acquiring the first distance, which is the distance between the position of the loop car and the reference position at the time of the step a),
e) A step of acquiring a second distance, which is the distance between the position of the loop car and the reference position at the time of the step b).
Including
If the loop car is moving in a direction to reduce the storage amount of the steel plate in the looper equipment at the time of the step a), the second distance is smaller than the first distance in the step c). Is executed on condition
When the loop car is moving in the direction of increasing the storage amount at the time of the step a), the step c) is executed on condition that the second distance is larger than the first distance. Anomaly detection method characterized by this. A loop car that reciprocates in the longitudinal direction of the steel plate while holding the steel plate,
A plurality of support rolls arranged along the longitudinal direction within the moving range of the loop car, and can be switched between a first state of supporting the steel plate and a second state of retracting so that the loop car can pass through. With multiple support roles configured in
A plurality of sensors capable of detecting the status of the plurality of support rolls, and
For computers that execute support roll abnormality detection processing in looper equipment equipped with
a) The specific support roll changes in response to the change of the state of the specific support roll among the plurality of support rolls to one of the first state and the second state. A step of acquiring a detection result indicating that one of the states is present from a sensor capable of detecting the state of the specific support roll among the plurality of sensors, and a step of obtaining the detection result.
b) A step of reacquiring the detection result of the sensor when a predetermined time has elapsed from the step a), and
c) A step of determining the presence or absence of an abnormality in the specific support roll based on the detection result of the sensor in the step b).
Is a program that executes
In the step c), the specific support roll is different from the one state even though the specific support roll should maintain the one state at the time of the step b). A program characterized in that when a detection result indicating that a state is obtained is acquired from the sensor in step b), it is determined that the specific support roll is abnormal. In the program according to claim 4,
The specific support roll is a program characterized in that, among the plurality of support rolls, the support roll closest to the folding position of the loop car. In the program according to claim 5,
The program
d) The step of acquiring the first distance, which is the distance between the position of the loop car and the reference position at the time of the step a),
e) A step of acquiring a second distance, which is the distance between the position of the loop car and the reference position at the time of the step b).
To the computer further
If the loop car is moving in a direction to reduce the storage amount of the steel plate in the looper equipment at the time of the step a), the second distance is smaller than the first distance in the step c). Is executed on condition
When the loop car is moving in the direction of increasing the storage amount at the time of the step a), the step c) is executed on condition that the second distance is larger than the first distance. A program characterized by that.

Images