JP3137899B2 - Control method of strip moving direction changing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact guide for a strip material such as a steel strip, which is used in a case where a plurality of processes are continuously performed on the strip material by a fluid ejected from a cylindrical body. The present invention relates to a control method for a device for changing the traveling direction of a strip-shaped material.

[0002]

2. Description of the Related Art When a plurality of treatments are continuously performed on a steel strip or the like, the traveling direction of the steel strip may be changed between processing apparatuses due to a layout problem of the entire equipment. As an example of a device for changing the traveling direction of a strip material, there is a device described in Japanese Patent Application Laid-Open No. 4-55254.

[0003] This device, as shown in Figs.
A spiral belt-shaped portion 2a is provided on the semicircular peripheral surface of the cylindrical floater 1a so that the steel belt surface is opposed to the spiral belt-shaped floater 1a, and a number of fluid jets 22, 22a penetrate the spiral belt-shaped portion 2a. The fluid introduced into the floater 1a is jetted from the fluid jet port 22 toward the steel strip surface, and the steel strip S is guided in a floating state using the spiral strip 2a as a traveling path.

Further, in order to make the width W _{K of the} traveling passage into a width corresponding to the plate width of the steel strip S, the cylindrical floater 1 a has a pair of spiral strip-shaped portions 2 a each having a shape along the widthwise outline. A side plate 50 is provided upright. This side plate 50
Is formed at one end of a cylindrical body 31 having an inside diameter that can be fitted to the cylindrical floater 1a, and the cylindrical body 31 serves as a cover for closing the fluid jet port 22a of the spiral band-shaped portion serving as a non-progressive passage.

[0005] The side plate 50 has a cover 3 for the purpose of increasing the floating amount of the steel strip, preventing meandering and skewing.
Numeral 1 is provided for the purpose of preventing the fluid from being unnecessarily ejected from the portion of the spiral band-shaped portion which becomes the non-progressive passage (reduction of the invalid flow rate).

[0006] A method of controlling a side plate in a case where a band has a width changing portion in such a band-shaped member traveling direction changing device having a side plate and a cover is disclosed in, for example, JP-A-3-20450. ing.

[0007] As shown in FIG.
Normally, when the plate width is constant, the side plate 50 and the steel strip S
A relatively narrow interval α is maintained between each end in the width direction
The side plate 50 so that the width change point
The width of steel strip S is W₁To W _TwoFigure 1
0 (b), this width change point corresponds to the floater 1a.
Move the side plate a predetermined time before reaching the guideway.
And the interval α is ((W _Two-W₁) / 2) + β (β> α)
And the width change point is changed as shown in FIG.
Wide width W after wrapping around data 1a_TwoBetween subsequent materials
The distance is set to α. This allows the steel strip to be
S is prevented from colliding with the side plate 50.

When the width of the steel strip S is reduced at the width change point, the width change point exits the floater 1a.
The side plate 50 is moved so that the interval α is maintained with respect to the subsequent plate width.

[0009]

[Problems to be solved by the invention]
In the method, when the plate width becomes large, FIG.
As shown in FIG.₁Preceding material is the whole floater 1a
With the body wrapped around, the interval is ((W_Two−
W₁) / 2) + β, so the invalid flow rate is very large
Become. In addition, when the plate width becomes small, the configuration shown in FIG.
As shown, the narrow plate width W_ThreeSubsequent material of the floater 1a is almost all
With the body wrapped around, the interval is ((W _Two−
W_Three) / 2) + α, so the invalid flow rate is very large
Become.

SUMMARY OF THE INVENTION The present invention has been made in view of such a point, and is directed to a device for changing the traveling direction of a strip while guiding the strip in a floating state by ejecting a fluid. It is an object of the present invention to prevent the invalid flow rate from increasing immediately before the width changing portion reaches the guide surface of the strip-like material advancing direction changing device and before the width changing portion reaches the guide surface and exits therefrom. And

[0011]

In order to solve the above-mentioned problems, the invention according to claim 1 is provided with a guide surface having a predetermined width in the axial direction on a peripheral surface of a cylindrical body, the guide surface facing the surface of the band-shaped material. A plurality of fluid ejection ports for ejecting a fluid from the cylinder toward the surface of the band-shaped material are provided on the guide surface, and the fluid ejected from the fluid ejection ports intersects the axial direction of the cylinder in a state where the band-shaped material floats from the guide surface. In the control method of the band-shaped material traveling direction changing device that changes the traveling direction by guiding in the direction in which the fluid ejection ports are provided at both ends in the width direction of the guide surface, the cover is provided in the cylinder. In addition to providing a moving means capable of moving in the axial direction, if there is a width change portion in which the width is reduced in the band-like material heading to the band-like material travel direction changing device, when the width change portion reaches the guide surface The guide surface side end position of the cover is As being located at a position corresponding to, a control method of the strip material traveling direction changing apparatus characterized by controlling said moving means.

According to a second aspect of the present invention, a guide surface that opposes the surface of the band-shaped material is provided on the peripheral surface of the cylinder with a predetermined width in the axial direction, and the guide surface is directed from the inside of the cylinder toward the surface of the band-shaped material. A plurality of fluid ejection ports for ejecting fluid are provided, and the fluid ejected from the fluid ejection ports guides the strip material in a floating state from the guide surface in a direction intersecting the axial direction of the cylindrical body, thereby changing the traveling direction thereof. In the control method of the material advancing direction changing device, a cover that covers the fluid ejection ports at both ends in the width direction of the guide surface is provided in the cylinder, and a moving unit that can move the cover in the axial direction of the cylinder is provided. When there is a width changing portion in which the width is increased in the band-shaped material heading to the band-shaped material traveling direction changing device, the guide surface side end position of the cover is changed to a subsequent width when the width changing portion exits the guide surface. Said movement so as to be located in the corresponding position It provides a method of controlling the strip material traveling direction changing apparatus characterized by controlling the stage.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic perspective view showing an apparatus for changing the traveling direction of a strip applied with a method corresponding to an embodiment of the present invention, and FIG. 2 is a schematic side view showing the arrangement of the apparatus and the strip. FIG. 3 is a partial sectional view of this device.

As shown in these figures, a guide surface 2 that faces the surface of the steel strip S is provided at the axial center portion of one semicircular surface 11 of the cylindrical body 1 in the same direction centered on this axis. These spirals are provided in the axial direction with a predetermined width W _A (dimension sufficiently larger than the width W _S of the steel strip S to be guided) as the width-direction outer line 21. A large number of through holes (fluid ejection ports) 22 are provided on the entire surface of the guide surface 2. Such a guide surface 2 is formed by, for example, forming a portion corresponding to a portion between two outlines 21 of the cylindrical body 1 with a punching metal.

At both ends in the width direction of the guide surface 2 in the cylindrical body 1, a curved surface fitted inside the semicircular surface 11 is used as an outer peripheral surface. A plate-like cover 3 formed in the same shape as the outline 21 is provided. As shown in FIG. 3, the cover 3 covers the through holes 22 at both ends in the width direction of the guide surface 2, and a fluid ejection width (progress passage width) W
_K is a width corresponding to the width W _S of the steel strip S (smaller than the width W _A of the guide surface 2).
It is formed by bending the outer peripheral surface so as to be a curved surface fitted inside the semicircular peripheral surface 11, and then cutting the spiral outer shape line 21 into a band having a predetermined width.

The cover 3 is movable in the axial direction of the cylindrical body 1 by, for example, a hydraulic cylinder 4 having a cylinder portion 41 fixed at a predetermined position in the cylindrical body 1.
The cylinder portion 41 of the hydraulic cylinder 4 is, for example, a cylinder 1
The end of the rod portion 42 is fixed to the width direction end surface (the end surface opposite to the guide surface) of the cover 3, and the end surface is pushed and pulled by the reciprocation of the hydraulic cylinder 4. As a result, the width of closing the guide surface 2 by the cover 3 is changed.

A fluid (gas or liquid) is supplied into the cylindrical body 1 at a predetermined pressure by a fluid introducing device (not shown).
Is introduced, and the introduced fluid is ejected from the inside of the cylindrical body 1 through the through hole 22 toward the surface of the steel strip S. The ejected fluid causes the steel strip S to be guided from the cylindrical body 1 in a floating state along the guide surface 2 and to proceed, so that the traveling direction is changed.

On the other hand, immediately before the steel strip S enters the guide surface 2 and immediately after the steel strip S enters the guide surface 2, the strip end position detecting device 5 (5L, 5R) detects the position of each end in the width direction of the steel strip S. ) Is installed. The strip end position detecting device 5 includes, for example, a light projector 5a and a light receiver 5b that are opposed to each other with the steel strip S interposed therebetween (see FIG. 2). With the strip-shaped end position detecting devices 5L and 5R, the width direction end surface position L _I of the steel strip S immediately before entering the guide surface 2 and the width direction end position L _O of the steel strip S immediately after exiting the guide surface 2 are determined. Are detected for each of the left and right ends. These positions L _I, L _O (L), as shown in FIG. 3, for example, as a reference point a predetermined point B _R of from the guide surface 2 the outer side in the axial direction of the cylindrical body 1, from the point B _R Detected as distance.

As shown in FIG. 2, at a point separated by a predetermined distance 1 from the guide surface start point on the entrance side of the steel strip S to the guide surface 2, the traveling steel strip S is constantly monitored at this point. Then, a width change point detecting device 8 that outputs a control signal T indicating a state of changing the width of the steel strip S is provided. The width change point detection device 8 outputs a control signal T = 1 when detecting a width change point at which the plate width decreases, and a control signal indicating this at a width change point at which the plate width increases. When T = 2 is not satisfied (when the plate width is constant), a control signal T = 0 indicating this is output.

A cover position detector 6 for detecting the end position K _C of the cover 3 in the width direction on the guide surface 2 side at the center position of the guide surface 2 in the traveling direction of the steel strip is provided in the cylindrical body 1. Each cover 3 is provided. As the cover position detector 6, for example, an analog position detector having a structure in which the unwinding length of a wire wound in a spiral manner changes with the movement of the cover 3 can be used. If the position sensor 4 is provided with a position sensor, this can also be used. Here, the position K _C (K) is also adapted to be detected as the distance from the position L _I, L _O to the same reference point B _R.

These position detection values L _I , L _O , and K _C are:
As shown in the block diagram of FIG. 4, the control device 7 composed of, for example, a microcomputer
The current value I _P corresponding to the pressure command value is output to the hydraulic cylinder 4 after a predetermined calculation process is performed in the control device 7. Further, a control signal T from the width change point detecting device 8 is also input to the control device 7.

The position detection value L _I from the strip end position detection device 5R (5L) installed on the entrance side, and the position detection value from the strip end position detection device 5R (5L) installed on the exit side. L _O and the control signal T from the width change point detection device 8 are:
It is input to the strip end position calculator 71 of the control device 7, and the strip end position calculator 71 sets the strip end position L for each case and outputs it to the adder / subtractor 72.

In the strip end position calculating unit 71, the width change point is detected for a predetermined time from the time when the control signal T changes from 0 to 1 (the width change point is detected according to the line speed, the diameter of the cylindrical body 1 and the like). Proceeding from the position of the device 8 and wrapping around the cylindrical body 1,
During the time) until the distance from the cylinder 1 sets the position detection value L _I of the inlet side to the strip material end position L. Also,
For a predetermined time (same as above) from the time when the control signal T changes from 0 to 2, the exit position detection value L _O is set to the strip end position L. At other times, the two detection values L _I ,
L average value of _{O ((L I + L O} ) / 2) the calculated set as the strip material edge position L.

The adder / subtractor 72 has the end position L of the strip.
At the same time, the interval setting value A is input from the strip-cover interval calculator 9.
Then, by subtracting the interval setting value A from the strip end position L, the end surface position (target value) of the cover 3 so that the interval between the end surface position of the steel strip S and the end surface position of the cover 3 becomes the set value A. Calculate K ₀ . The calculated end face position K ₀ is input to the adder / subtractor 73. Here, the band-cover-interval calculator 9 calculates the end position of the width direction end face of the steel strip S and the end face position of the cover 3 on the guide surface 2 side according to the sheet width, the sheet thickness, and the material of the steel strip S. For example, a human selects an appropriate value A as the interval and inputs it to the adder / subtractor 72 of the control device 7.

The adder / subtractor 73 calculates the amount of movement ΔK of the cover 3 necessary for the interval between the widthwise end face position of the steel strip S and the widthwise end face position of the cover 3 on the guide surface 2 side to become the set value A. I do.

Here, the end position in the width direction of the steel strip S is set in the strip end position calculator 71 in accordance with the control signal T from the width change point detecting device 8 as described above. , A cover position calculator 76 is provided in the controller 7, and a control signal T from the width change point detector 8 and a position detection value K _C from the cover position detector 6 (in the traveling direction of the steel strip on the guide surface 2). (The value at the center position), and the control signal T changes from 0 to 1
Between strange time for a predetermined time, the converted position detection value K _C to the value of the entry side, the predetermined period of time from when the control signal T changes from 0 to 2, out of the position detection value K _C To the value on the side. At other times, the position detection value K _C is output to the adder / subtractor 73 as the cover end position K as it is.

Thus, in response to the control signal T from the width change point detecting device 8, the strip end position L from the strip end position calculator 71 and the cover end position K from the cover position calculator 76 are set. In the adder / subtractor 73, the end surface position (target value) K of the cover 3 obtained by the adder / subtractor 72
By subtracting the cover end position K obtained by the cover position calculator 76 from ₀ , the movement amount ΔK is accurately calculated.

The calculated cover movement amount ΔK is input to a PI control calculator 74, and a predetermined proportional-integral operation signal f (Δ
K), and this value is input to the pressure control device 75. The pressure control device 75 calculates the current command value I _P for the amount corresponding to the amount of movement of the hydraulic cylinder 4 in the signal f ([Delta] K), outputs the current command value I _P to the hydraulic cylinder 4 I do. As a result, the cover 3 moves with the amount of movement of the hydraulic cylinder 4 being the amount of movement of the cover 3 as it is.

In this control device 7, the cover end
Detection value K_CIs fed back to the adder / subtractor 73,
The value of K_CIs the target K calculated by the cover position calculator 76.
Value K ₀Feedback system that repeats the correction until it becomes
It is being done.

Therefore, according to this strip-shaped member traveling direction changing device, the traveling passage width W corresponding to the interval between the left and right covers 3 is provided.
Due to the fluid ejected from _K , the steel strip S is guided in a floating state from the cylindrical body 1 along the guide surface 2 and proceeds, and its traveling direction is changed, but before the detection of the sheet width change point of the steel strip S and After a lapse of a predetermined time from the detection, the interval between the width direction end face position of the steel strip S and the end face position of the cover 3 on the guide surface 2 side is maintained at the set value A. Direction end,
The cover 3 does not reach the position where the fluid outlet 22 is closed. Thereby, even when the steel strip S meanders, the end in the width direction thereof is prevented from vibrating or breaking, and the occurrence of flaws is also prevented. In addition, the flying height in the plate width direction becomes uniform, and the meandering amount itself decreases.

Next, the operation in the case where the plate width change point of the steel strip S is on the guide surface of the band-shaped material traveling direction changing device and immediately before and after it is described below. FIG. 5 is a view showing each stage in which the width change point at which the plate width of the steel strip S is reduced reaches the guide surface of the cylindrical body 1 and is guided by being wound around the cylindrical body 1. FIG. 5 is a developed plan view in which the guide surface of FIG. FIG. 5A shows that the width change point detecting device 8 is a steel strip S.
5 (b) shows a stage where the width change point of the steel strip S has begun to wrap around the guide surface, and FIG. 5 (c) shows a stage where the width change point of the steel strip S has been detected. FIG. 5D shows a stage in which the point has advanced to the middle of the guide surface, and FIG. 5D shows a stage in which the width change point of the steel strip S has come out of the guide surface.

As shown in FIG. 5 (a), the width change point at which the width of the steel strip S is reduced (W ₂ → W ₃ ) is detected by the width change point detecting device 8 installed in front of the cylindrical body 1. If so,
For a predetermined time from that point, the band end position calculating unit 7
In step 1, the detected end position L _I of the strip material on the incoming side is output to the adder / subtractor 72 as the end position L of the strip material, and the cover position calculator 76 converts the detected cover position value K _C into a value on the incoming side. The end position K is output to the adder / subtractor 73.

Therefore, as shown in FIG. 5B, when the width change point of the steel strip S reaches the guide surface of the cylindrical body 1, the guide surface side end position 3a of the cover is changed to the sheet width of the succeeding material. corresponding to W _3, so that is located outside a position just setting value a from the widthwise end faces position. (At this time, depending on the difference in the sheet width between the preceding material and the succeeding material, there is no gap between each end of the steel strip in the width direction and the end of the cover on the guide surface side, as in this example, the ends are sometimes overlap.) state that reason, both of the following materials and wide preceding material in the plate width W ₂ of FIG. 5 (as shown in c), a narrow plate width W ₃ is wound around the guide face , and as shown in FIG. 5 (d), it is possible to preceding material of large plate width W ₂ is at the off from the guide surface, significantly reducing the invalid flow.

FIG. 6 is a view showing each stage in which the width change point where the plate width of the steel strip S becomes large reaches the guide surface of the cylindrical body 1 and is wound around and guided. FIG. 4 is a developed plan view in which a spiral belt-shaped guide surface is replaced with a parallel belt shape. FIG. 6A shows a stage in which the width change point detecting device 8 has detected the width change point of the steel strip S, and FIG. 6B shows that the width change point of the steel strip S has begun to wind around the guide surface. The steps are shown in FIG.
(C) shows the stage where the width change point of the steel strip S has progressed to the middle of the guide surface, and FIG. 6 (d) shows the stage where the width change point of the steel strip S has come out of the guide surface.

As shown in FIG. 6 (a), the width change point at which the width of the steel strip S becomes large (W ₁ → W ₂ ) is detected by the width change point detecting device 8 installed in front of the cylindrical body 1. If so,
For a predetermined time from that point, the band end position calculating unit 7
In step 1, the detected end position L _O of the output strip is output to the adder / subtractor 72 as the end position L of the strip, and the cover position calculator 76 converts the detected cover position value K _C into an output value. The end position K is output to the adder / subtractor 73.

[0036] Therefore, as shown in FIG. 6 (b), when the width changing point of the steel strip S reaches the guide surface of the cylindrical body 1, and as shown in FIG. 6 (c), a wide plate width W ₂ in a state where both of the following material and narrow preceding material in the plate width W ₁ is wound around the guide surface, the guide surface side end position 3a of the cover corresponding to the plate width W ₁ of the preceding material, the width direction thereof It remains arranged at a position outside the end face position by the set value A.

Then, as shown in FIG.
Width changing point deviates from the guide surface of the cylindrical body 1 of the belt-shaped member edge detector 5R outgoing side, after the end of the subsequent material wider strip width W ₂ is detected by 5L, the guide surface of the cover End position 3
“a” is disposed at a position corresponding to the plate width W ₂ of the succeeding material and located outside of each end face position in the width direction by a set value A. sand
In other words, in this embodiment, the width change point at which the
When guiding, when this width change point exits the guide surface,
The cover 3 is moved to a position corresponding to the wide plate width.

[0038] Therefore, as shown in FIG. 6 (b), when the width changing point of the steel strip S reaches the guide surface of the cylindrical body 1, and as shown in FIG. 6 (c), a wide plate width W ₂ both of the following material and narrow preceding material in the plate width W ₁ is in a state in which the wound around the guide surface, it is possible to significantly reduce the invalid flow.

[0039] As described above, in the strip material traveling direction changing apparatus for regulating the traveling path width W _K of the steel strip S in the conventional side plates, and guided by which (guide surface 2 is passed through the width changes The ineffective flow rate was very large in order to avoid contact with the steel strip S during and before and after that) (see FIGS. 10 and 11). the progress passage width W _K from it has a structure for restricting a cover 3 provided inside the cylinder 1, since no cover 3 is in contact with the steel strip S, it is possible to control as described above, the width The reactive flow during and before and after the change point can be significantly reduced.

[0040]

In the above-described embodiment, the strip end position detecting devices 5L and 5R are installed on both the entrance side and the exit side of the steel strip S to the guide surface 2 to change the width of the steel strip S. Before and after a predetermined time has passed since the detection of the belt-like material, the average value of the detection values L _I and L _O (the value at the center of the guide surface 2 in the traveling direction of the steel strip) of each detection device is used as the band-shaped material. Since the end position L is used, even when the steel strip S is twisted and does not follow the guide surface 2 as shown in FIG. 7, the end position L of the strip material is accurately detected. In addition, the end position detecting devices 5L, 5R for the strip-shaped material are provided.
Are installed not on the center of the guide surface 2 in the traveling direction of the steel strip but on the entrance side and the exit side, so that the contact between the detection device and the steel strip S can be avoided.

In the above-described embodiment, the cover position detector 6 is used as the end surface position K in the width direction on the guide surface 2 side of the cover 3.
, But is not limited to this.
Any position may be used as long as the position in the width direction of the cover 3 (the axial direction of the cylindrical body 1) is specified, and as a result, the width direction end surface position on the guide surface 2 side is obtained.

The apparatus for changing the traveling direction of the strip material to which the control method of the present invention can be applied is not limited to the apparatus for guiding the strip material spirally as in the above embodiment, but is perpendicular to the axial direction of the cylindrical body. The present invention is also suitably applied to a device for guiding in a direction (a device in which the change angle in the axial direction of the cylinder is “0”).

[0044]

As described above, according to the method of the first aspect, when there is a width changing portion in which the width is reduced in the band-shaped material, the width changing portion is provided on the guide surface of the band-shaped material traveling direction changing device. Between reaching and exiting, the reactive flow can be prevented from increasing.

According to the second aspect of the present invention, when there is a width changing portion having a large width in the strip, the width changing portion reaches the guide surface of the device for changing the traveling direction of the strip and exits therefrom. In addition, it is possible to prevent the invalid flow rate from increasing.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a band-shaped material traveling direction changing device to which a method corresponding to an embodiment of the present invention is applied.

FIG. 2 is a schematic side view showing the arrangement of the strip-moving-direction changing device and the strip in FIG. 1;

FIG. 3 is a partial cross-sectional view of the device for changing the direction of travel of the strip material of FIG. 1;

FIG. 4 is a block diagram showing a control method performed by the strip-material-movement-direction changing device of FIG. 1;

FIG. 5 is a cross-sectional material traveling direction changing device of FIG. 1;
It is a figure which shows each stage wound around this, and is equivalent to the flat surface development figure which expanded the cylindrical body and replaced the spiral belt-shaped guide surface with the parallel belt shape, (a) is a width change point detection apparatus. (B) shows the stage where the width change point of the steel strip starts to wrap around the guide surface, and (c) shows the stage where the width change point of the steel band starts to reach the middle of the guide surface. The advanced stages
(D) shows the stage where the width change point of the steel strip has come out of the guide surface.

FIG. 6 is a cross-sectional view of the device for changing the direction of travel of the strip shown in FIG. 1;
It is a figure which shows each stage wound around this, and is equivalent to the flat surface development figure which expanded the cylindrical body and replaced the spiral belt-shaped guide surface with the parallel belt shape, (a) is a width change point detection apparatus. (B) shows the stage where the width change point of the steel strip starts to wrap around the guide surface, and (c) shows the stage where the width change point of the steel band starts to reach the middle of the guide surface. The advanced stages
(D) shows the stage where the width change point of the steel strip has come out of the guide surface.

FIG. 7 is a perspective view showing a state in which the steel strip is meandering without twisting along a cylindrical surface and twisted in the strip-shaped material advancing direction changing device.

FIG. 8 is a front view showing a conventional example of a device for changing the traveling direction of a strip.

FIG. 9 is a partial cross-sectional view of the device for changing the direction of travel of the strip material of FIG. 8;

FIG. 10 is a view showing each stage in which the width change point at which the steel strip width becomes large reaches the guide surface of the cylindrical body and is wound around and guided by the conventional method, and FIG. The stage in which the width of the steel strip being guided is constant, the stage (b) the stage before a predetermined time when the width change point of the steel strip reaches the guide surface,
(C) shows the stage where the width change point of the steel strip has progressed to the middle of the guide surface.

FIG. 11 is a diagram showing a state in which a width change point at which the width of a steel strip is reduced is wound around a guide surface of a cylindrical body and guided by a conventional method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical body 2 Guide surface 3 Cover 4 Hydraulic cylinder (moving means) 5 (5R, 5L) strip end position detecting device 6 Cover position detector 7 Control device 11 Semicircular surface 22 Through hole (fluid ejection port) 71 Strip end position calculator S Steel strip (Strip)

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-60-248555 (JP, A) JP-A-4-55254 (JP, A) JP-A-7-101036 (JP, A) JP-A-6-248 48629 (JP, A) JP-A-58-202241 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65H 23/32 B65H 23/032

Claims (2)

(57) [Claims] 1. A plurality of guide surfaces which oppose each other with a predetermined width in the axial direction on the peripheral surface of a cylindrical body, and a plurality of guide surfaces for ejecting a fluid from the cylindrical body toward the surface of the band material. A device for changing the direction of travel of a strip that changes the direction of travel by guiding a strip in a direction intersecting with the axial direction of the tubular body in a floating state from a guide surface by a fluid ejected from the fluid outlet and providing a fluid ejection port. In the control method, a cover that covers the fluid ejection ports at both ends in the width direction of the guide surface is provided in the cylinder, and a moving unit that enables the cover to move in the axial direction of the cylinder is provided. If there is a width change portion where the width is reduced in the band-shaped material heading toward, the guide surface side end position of the cover is arranged at a position corresponding to the subsequent width when the width change portion reaches the guide surface. Controlling said moving means as The method of the strip material traveling direction changing apparatus according to claim and. 2. A plurality of guide surfaces, each of which has a predetermined width in an axial direction on a peripheral surface of a cylindrical body and opposes a surface of the belt-like material, and a plurality of guide surfaces for ejecting a fluid from the inside of the cylindrical body toward the surface of the belt-like material. A device for changing the direction of travel of a strip that changes the direction of travel by guiding a strip in a direction intersecting with the axial direction of the tubular body in a floating state from a guide surface by a fluid ejected from the fluid outlet and providing a fluid ejection port. In the control method, a cover that covers the fluid ejection ports at both ends in the width direction of the guide surface is provided in the cylinder, and a moving unit that enables the cover to move in the axial direction of the cylinder is provided. If there is a width change portion in which the width is increased in the band-shaped material toward, when the width change portion exits the guide surface , the guide surface side end position of the cover is arranged at a position corresponding to the subsequent width. Controlling the moving means so that The method of the strip material traveling direction changing apparatus according to symptoms.