JP3251510B2 - Device for changing the direction of passing of strip material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the conversion of the passing direction of a strip made of a cold-rolled steel sheet or the like, in which a running strip is wound helically and the passing direction is changed in a non-contact state. The present invention relates to a board direction changing device.

[0002]

2. Description of the Related Art A so-called helical floater type passing direction changing device for winding a running strip around a floater in a helical manner and changing the passing direction in a non-contact state is known. The plate direction can be changed, and the degree of freedom in the plate changing direction is large.

[0003] For this reason, this kind of passing direction changing device is
In recent years, it has been adopted in various process lines, and in particular, continuous two or more processes have a great effect on labor saving and yield reduction. Is also increasing. The helical floater-type passing direction changing device is considered to be useful in that the passing direction of the strip material can be changed without non-contact, that is, without causing scratches.

[0004] Conventionally, as an apparatus for floatingly supporting a strip-shaped material such as a steel strip in a helical manner as described above and changing the passing direction in a non-contact state, for example, it is described in Japanese Patent Application Laid-Open No. 51-25274. Are known.

[0005] This device, as shown in Figs.
The floater 50 includes a cylindrical floater 50 and a plurality of ejection holes 51 provided along the belt-like material winding position (passing position) L on the surface of the floater 50 and capable of ejecting gas at a predetermined pressure. Further, guide rolls 53 and 54 for guiding the strip 52 are arranged on the entrance side and the exit side of the strip 52 with respect to the floater 50, respectively.

In such an apparatus, the conveyed strip 52 is guided by the guide roll 53 on the entry side and is wound obliquely along the surface of the floater 50. While passing along the surface, the passing direction is changed, and the sheet is sequentially sent to the next step via the guide roll 54 on the delivery side.

Here, the band-shaped material 52 wound around the floater 50 is floated and supported from the surface of the floater 50 by the gas ejected from the ejection holes 51, and is not in contact with the floater 50 along a predetermined pass line. Move.

[0008]

Here, in the above-described apparatus for changing the direction of the passing plate, the band 52 is supported by floating from the surface of the floater 50. The direction of the floater 5 is not
The surface of the belt-shaped material 52 that has come out of the floater 50 is likely to be meandered by being helically wound around the surface of the zero.

Further, since the passing direction of the band-shaped material 52 is changed in the twisted state as described above, the rigidity of the band-shaped material 52 causes the band-shaped material 52 being changed in the passing direction to skew (floater 50). At the same time, the position of the floater 50 on the exit side with respect to the entrance position is shifted in the plate width direction with respect to the target pass line.

Furthermore, it is difficult to set the apparatus so as to accurately change the target passing direction, for example, to bend exactly 90 degrees, and a slight error in the installation accuracy of the guide roll 53 and the floater 50 causes an error. The skew and the flying height difference occur.

However, in the conventional apparatus as described above, the belt-shaped material 52 is simply wrapped around the floater 50 and floated and supported by the jetted gas.
The belt-shaped material 52 carried out from 0 is not positively centered.

Therefore, when the sheet passing speed is high, the meandering amount and the skew increase, for example, the meandering amount may reach 80 mm or more. In particular, in the case of the wide band-shaped material 52, the band-shaped material 52 is rolled out by the guide roll 54 on the output side, and the band-shaped material 52 is broken, scratches and the like are generated, which is a quality problem.

In addition, the increase in the skew and the difference in the floating amount of the strip 52 during the passing direction change also causes a problem that the floater 50 and the strip 52 come into contact with each other. For this reason,
In the case of adopting the conventional passing direction changing device as described above, in order to prevent the above-described problem, the passing speed of the band-like material 52 has to be reduced, which greatly impedes productivity.

That is, as the sheet passing speed is increased, meandering or skew occurs frequently in the process line employing this apparatus, and the production efficiency is greatly reduced, and a helical floater type sheet passing direction changing device is used. Even if a plurality of process lines are made continuous without contact, there is a problem that a sufficient effect cannot be obtained.

Here, in the conventional passing direction changing device, in order to suppress the swing in the sheet width direction at the time of the passing direction change,
For example, as described in Japanese Patent Application Laid-Open No. 4-55254, there may be provided a side plate or the like for guiding the strip 52 along the strip winding position (passing position) L on the surface of the floater 50. When the band-shaped material 52 swings in the width direction of the plate, the band-shaped material 52 rubs against the side plate or the like, which causes a deterioration in the quality of the band-shaped material 52.

The present invention has been made in view of the above-described problems, and is a helical floater-type sheet passing direction capable of suppressing the meandering of the strip-shaped material after the sheet passing direction is changed and increasing the production efficiency. It is an object to provide a conversion device.

[0017]

According to a first aspect of the present invention, there is provided an apparatus for changing the direction in which a running strip is passed around a running strip at a predetermined spiral angle. A non-contact type plate passing direction changing device that includes a floater that changes the direction of passing the band-shaped material and that floats and supports the band-shaped material by fluid ejected from a large number of ejection holes provided on the surface of the floater; A center position control device for performing position control by a steering roll is provided on at least the exit side of the entrance side and the exit side of the band-shaped material.

In the present invention, since the center position control device is provided at least on the outlet side of the floater, even if the belt-shaped material undergoing the changing of the passing direction has meandering or skew,
Centering of the strip is performed by the center position control device on the floater outlet side. That is, since the target pass line is corrected on the exit side, the meandering amount generated in the band-shaped material after the passing direction change is reduced.

Further, when a center position control device is provided also on the floater entrance side, the strip material is centered before being wound around the floater, and is surely wound around the floater along a target path line. This also leads to a reduction in the skew of the strip during the passing direction change.

Next, according to a second aspect of the present invention, the pivot angle of the steering roll of the center position control device provided on the floater exit side is different from the first aspect.
It is characterized in that the angle is set to a positive predetermined angle.

Here, setting the above positive pivot angle means that the steering roll portion which is swung downward is displaced also in the traveling direction side of the band material to be wound.

In the center position control device of the type in which the axis of the steering roll is turned up and down around a predetermined turning axis, as shown in FIG. 10, when the pivot angle θ of the steering roll 60 is set to a negative angle, Since the skew direction of the steering roll 60 and the sliding direction of the strip 61 coincide, the meandering is facilitated. However, in the present invention, by setting the pivot angle of the steering roll to a predetermined positive angle, the skew direction of the steering roll and the sliding direction of the belt-like material are opposite to each other, and the centering on the floater exit side is performed. At the same time, it is possible to correct the skew and meandering at the floater portion on the steering roll entry side (upstream side).

In other words, the center position control device described above has a pincushion effect by setting the pivot angle to be positive while preventing meandering on the output side by a transfer system with good responsiveness, and has a skew on the upstream side. Can be corrected.

In FIG. 10, P is the turning axis of the steering roll, H is the vertical plane with the entry-side pass line, S is
Represents the swing reference plane of the steering roll. Here, conventionally, a center position control device having a positive pivot angle may be used to control the position of the plate at the time of winding the plate, etc. It is used to suppress meandering at the downstream of the installation position of the center position control device, and it is difficult to correct the meandering because the upstream side of the installation position is restrained by a roll.

In the present invention, since the center position control device in which the pivot angle of the steering roll is positive is provided on the floater exit side, the restriction on the plate on the upstream side is small,
The effect of correcting the meandering on the upstream side is higher than before.

Here, since the band-shaped material portion during the passing direction change is wound around the floater in a helical manner and twisted, the band-shaped material is inclined in the plate width direction when skewed or meandering, and the floating amount difference is increased. Becomes larger and the overall flying height also fluctuates, and is likely to be in contact with the floater surface and cause abrasion, but as described above, when the skew and meandering of the band-shaped material portion during the passing direction change are reduced, Fluctuations in the flying height are also suppressed, and the occurrence of scratches and the like during the change in the passing direction is also suppressed.

That is, by combining the helical turner with the center position control device of the steering roll having a positive pivot angle, it is possible to obtain a higher meandering correction effect on the upstream side (floater portion) than usual. A stable floating thread can be obtained (synergistic effect).

[0028]

Next, an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, a steel strip 2 will be described as an example of the belt-shaped body.

FIG. 1 shows a threading direction changing apparatus according to this embodiment.
As shown in FIG. 1, a floater 1 constituting a main body of the apparatus, and well-known center position control devices 3 and 4 arranged on the inlet side and the outlet side of the steel strip 2 with respect to the floater 1 are provided.

The floater 1 has the same configuration as that of a conventional apparatus, and its main body has a cylindrical appearance. Then, as shown in FIG. 2, a large number of ejection holes are formed on the surface at a helical steel strip winding position (the direction in which the steel strip 2 passes) L extending along a spiral angle of, for example, 45 degrees. 5 have been established. Each ejection hole 5 communicates with a flow passage provided inside the floater 1 so as to jet a gas, which is a fluid supplied to the flow passage, at a set pressure. The jet holes 5 are arranged on the surface of the floater 1 at equal pitches.

Here, the gas is preferably compressed air in terms of cost, but may be composed of another gas such as nitrogen. Further, in FIG. 2, the opening shape of each ejection hole 5 is illustrated as a circular hole, but may be a rectangle or the like,
The ejection hole 5 may be formed by a slit-shaped opening or the like. In FIG. 2, reference numeral 6a denotes an inflow passage of the compressed gas in the flow passage, and 6b denotes an outflow passage.

Each of the center position control devices 3 and 4 on the entrance side and the exit side is provided with a steering roll that can swing up and down around a predetermined pivot axis P (see FIG. 3) around the steel strip 2. And actuators 8, 1 such as hydraulic cylinders for driving the steering rolls 7, 11 so as to be displaced along the swing reference plane S (see FIG. 3).
2 and a position detector 1 such as a photoelectric type for detecting the position of the steel strip 2
Controllers 9 and 13 for centering and adjusting the position of the steel strip 2 to the set position by swinging the steering rolls 7 and 11 via the actuators 8 and 12 and the actuators 8 and 12.
It is composed of

Then, the controllers 9 and 13 operate via the actuators 8 and 12 in a direction in which the deviation between the current position input from the position detectors 10 and 14 and the set position (position on the pass line) becomes zero. Steering roll 7,1
1 is continuously displaced.

Further, in the center position control device 4 on the exit side, as shown in FIG. 3, the pivot angle θ of the steering is set to a predetermined positive angle, for example, +2 degrees, so that the swing of the steering roll 11 is changed. Reference plane S is vertical plane H
, It is inclined toward the upstream side of the steel strip 2 as going upward. As a result, the steering roll 2 has a pivot angle θ
Is set so that the side swung downward is also displaced in the traveling direction of the steel strip 2 by an amount corresponding to. That is, a pincushion effect occurs.

Reference numerals 16 and 17 denote guide rolls such as deflector rolls for guiding the steel strip 2. next,
The operation, operation, and the like of the above-described direction change device will be described.

The steel strip 2 is successively introduced into the guide roll 16 on the entry side.
The centering is performed around the floater 1 while centering is performed by the center position control device 3 on the entry side, and the sheet passing direction is changed in a non-contact state with the floater 1 by being floated and supported by the compressed air. Subsequently, centering of the steel strip 2 carried out of the floater 1 is performed by the center position control device 4 on the outlet side, and the steel strip 2 after the centering is sent to the next step via the guide roll 17 on the outlet side.

As described above, the steel strip 2 is wound around the floater 1 while being adjusted by the entry side center position control device 3 so that the center of the steel strip 2 coincides with the center of the pass line. The steel strip 2 is wound around the floater 1.

Further, even if skew or meandering occurs during the change of the passing direction, the center position control device 4 on the delivery side can be used.
Thus, centering of the steel strip 2 is performed. As a result, the steel strip 2 after the passing direction is transferred to the next process along the target pass line without the roll-out or the like occurring on the guide roll 17 or the like. That is, even if the passing speed is increased as compared with the conventional case, the meandering of the steel strip 2 after the passing direction is changed can be suppressed to a small value.

As a result, even when a non-contact type sheet passing direction changing device is applied downstream of the annealing step or the like to make two or more steps continuous, it is possible to operate at a higher sheet passing speed than before. It becomes possible.

At this time, since the pivot angle θ of the steering roll 11 is set to a positive angle, the sliding direction of the steel strip 2 and the skew direction of the steering roll 11 are opposite to each other, so that the meandering is not promoted. Centering is performed, thereby effectively reducing the meandering of the steel strip 2 after the threading is changed while having the pincushion effect, and the steel strip 2 being changed in the threading is floated and supported by the floater 1 so as to extend in the sheet width direction. Since the centering operation is performed on the outlet side as described above, the operation is also propagated to the portion where the floater 1 is wound around the steel strip 2 as described above, and the inclination of the steel strip 2 during the passing direction change is performed. Rows and meandering are also suppressed.

As a result, even if the steel strip 2 is twisted during the change of the passing direction and there is an installation error in the floater 1 or the like, the skew or meandering of the steel strip 2 during the changing of the passing direction is reduced. ,
The increase in the flying height difference and the swing of the flying height itself are suppressed. Therefore, contact between the steel strip 2 and the floater 1 during the change of the passing direction is also avoided.

Here, in order to effectively suppress the meandering of the steel strip 2 around the floater winding part by the centering operation on the floater 1 outlet side, the set flow rate of the jetting fluid, the tension of the steel strip 2 and the size of the floater 1 For example, the positive angle of the pivot angle θ of the steering roll 11 may be determined based on the passing condition.

As described above, in the passing direction changing apparatus of the present embodiment, the pass line at the time of changing the passing direction by the floater 1 can always be held at a desired position even in the non-contact method. In other words, skew and meandering, which are likely to occur in the helical type plate passing direction changing device, are reduced, and as a result, the floating amount difference and the swing of the floating amount itself are suppressed.

The fact that the skew during the passing direction change is reduced is propagated to the floater 1 exit side, and
This leads to further suppression of meandering and offset in the width direction of the steel strip 2 on the exit side.

In the above embodiment, the center position control device 3 is installed on the entrance side of the floater 1 as well. However, it is not always necessary to provide the center position control device 3 on the entrance side. By other restraining rolls, etc.
The steel strip 2 entering the floater 1 may be constrained to pass through the target pass line.

Further, in the above embodiment, the external shape of the floater 1 is cylindrical, but the present invention is not limited to this. The floater 1 has a portion L around which the steel strip 2 is wound.
It is only necessary that only one has a predetermined substantially arc shape.

Further, as the center position control device of the present embodiment, an example in which one steering roll is turned up and down around a predetermined turning axis P is described as an example.
The invention is not limited to this. For example, as shown in FIG. 5, a center position control device that rotates two steering rolls 11 may be used, or as shown in FIG. A center position control device that swings the roll 11 left and right may be used, or a skew roll type that rotates the shaft 11a of the steering roll 11 itself as shown in FIG. 7 may be used. 7 is generally not used because the response is generally slow and the stability is poor.

However, when the center position control device shown in FIGS. 3 and 5 is used, skew of the steel strip 2 during the change of the passing direction due to the pincushion effect is performed while the centering is carried out by the moving system having good response. And meandering can be corrected.

[0049]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Actually, the centering of the steel strip 2 at the outlet side of the floater 1 using the center position control device 4 as described above and the case of not performing centering as in the prior art for comparison. Then, when the meandering amount of the steel strip 2 on the outlet side of the floater 1 was measured, the result shown in FIG. 4 was obtained. Here, the pivot angle θ of the steering roll 11
Is set twice. The average threading speed is
It was set to 500 mpm.

In FIG. 4, A represents the case based on the above embodiment, B represents the case without the center position control device, and C represents the pivot angle θ of the steering roll 11.
Is set to 0 degrees.

As can be seen from FIG. 4, it is understood that the meandering amount of the steel strip 2 after the change in the passing direction can be reduced by adopting the passing direction changing device of the present embodiment. That is, in the case of C, meandering on the exit side of the center position control device is small. In the case of A, the meandering on the entrance side of the center position control device is small, and consequently the exit side of the center position control device is even smaller.

In order to suppress the meandering amount by the conventional device without the center position control device to the same meandering amount as when the passing direction changing device of the present embodiment is adopted, the average passing speed is set to 300 mpm or less. We also confirmed that we had to set it.

[0053]

As described above, in the apparatus for changing the direction of passing a band-shaped material according to the present invention, the amount of meandering generated in the band-shaped material after the change in the direction of passing of the band can be reduced as compared with the prior art. Even if a so-called helical floater type passing direction changing device that wraps the material around the floater in a helical manner and changes the passing direction in a non-contact state, it is possible to increase the passing speed and improve productivity. There is an effect of doing.

Further, according to the present invention, meandering on the floater exit side can be suppressed as described above, and the amount of skew and meandering of the band-shaped material wound around the floater can be reduced.
When the amount of skew and meandering is reduced, there is also an effect that the difference in the floating amount and the fluctuation of the floating amount of the band-shaped material portion during the change of the passing direction are reduced.

This further leads to suppression of meandering on the floater exit side. In particular, when the invention of claim 2 is adopted,
Even if a center position control device with good responsiveness in which the steering roll is turned up and down is used, centering with good responsiveness on the floater exit side, and skew and meandering that occur in the band-shaped material during the change of the passing direction Etc. can be suppressed.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an apparatus for changing the direction of passing a band-shaped material according to an embodiment of the present invention.

FIG. 2 is a diagram showing a floater according to the embodiment of the present invention.

FIG. 3 is a side view showing a steering roll of the center position control device on the floater exit side according to the embodiment of the present invention.

FIG. 4 is a diagram showing a meandering amount on a floater exit side;
(A) is a figure which shows the state at the output side of a floater, (b) is a state at the output side of a center position control apparatus.

FIG. 5 is a diagram for explaining a type of another center position control device.

FIG. 6 is a diagram for explaining a type of another center position control device.

FIG. 7 is a diagram for explaining a type of another center position control device.

FIG. 8 is a diagram showing a conventional floater.

FIG. 9 is a view showing a conventional belt-shaped sheet passing direction changing device.

FIG. 10 is a diagram showing a case where the pivot angle of the steering roll is set to a negative angle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floater 2 Steel strip 3 Inlet center position control device 4 Outlet center position control device 5 Injection hole 7 Inlet steering roll 8,12 Actuator 11 Outlet steering roll 9,13 Controller 10,14 Position detector P Turn Axis S Oscillation reference plane H Vertical plane θ Pivot angle

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yotoshi Yamashita 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Corp. Chiba Works (56) References JP-A-4-55254 (JP, A) JP Hei 6-286917 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B65H 23/32 B65H 23/038

Claims (2)

(57) [Claims] 1. A floater for winding a running strip at a predetermined helical angle to change the direction in which the strip passes, and a fluid spouted from a large number of ejection holes provided on the surface of the floater. In the non-contact type passing direction changing device for supporting the floating, a center position control device for performing position control by a steering roll is provided on at least the outgoing side of the entrance side and the outgoing side of the strip material with respect to the floater. Characteristic device for changing the direction of passing a strip. 2. A change in the direction of passing of a belt-shaped material according to claim 1, wherein the pivot angle of the steering roll of the center position control device provided on the floater exit side is set to a predetermined positive angle. apparatus.