JPH05193802A - Floater for belt like material (registered trademark) - Google Patents

Abstract

PURPOSE:To prevent a belt-like material from being flawed or from snaking by setting an installation space of side plates arranged so as to sandwich the belt-like material between them, equal to or larger than the width of the belt-like material in the prescribed length in a floater in a floater for the belt-like material which floats/supports the same by means of jet fluid. CONSTITUTION:An installation space W of side plates 3-1 and 3-2 arranged in parallel in the travel direction so as to sandwich a belt-like material 1 between them, is set equal to or larger than the width B of the belt-like material 1 as well as equal to or smaller than the width B of the belt-like material 1 + the floating height (h)X8 of the belt-like material 1. When spaces between the side plates 3-1 and 3-2 and the belt-like material 1 are narrowed to less than four times the floating height (h) of the belt-like material 1, pressures of fluid cushion in the vicinity of the side plates start to change and rise, but when the spaces are equal to or larger than four times, the pressures do not change. When the belt-like material 1 is situated in the center of the side plates 3-1 and 3-2, it floats horizontally. When the belt-like material 1 is snaking, one space is decreased, and pressure distribution of the fluid cushion to the belt-like material 1 changes, and force is generated in the opposite direction to the snaking direction, so that it becomes the force to correct snaking.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floater that jets a fluid to float and support a belt-like material.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 63-176435 discloses a floater which conveys a belt-like material in a non-contact manner. According to this Japanese Patent Laid-Open No. 176435/1988, the strip is floated and supported by a fluid cushion formed by the static pressure generated by the ejected fluid. When the strip meanders and the gap between the strip and the side plate becomes smaller, the fluid is less likely to escape from the small gap.Therefore, the pressure of the fluid cushion near the side plate where the gap between the strip and the side plate becomes smaller Becomes higher, and the strip tilts so that the end closer to the side plate becomes higher. Due to this inclination, a component force in the width direction is generated in the static pressure generated by the ejected fluid in a direction opposite to the meandering direction, and the position of the belt-like material is corrected.

Japanese Patent Laid-Open No. 3-20450 discloses a floater which conveys a belt-like material in a non-contact manner. In the floater, a side plate which is substantially upright is provided on the side of a moving line of the belt-like material, and the side plate is the width of the belt-like material. It is characterized in that it is movable in any direction, and when the width of the conveyed belt-like material is changed, it is adjusted according to the width of the conveyed belt-like material. According to the Japanese Patent Laid-Open No. 3-20450, the above-mentioned Japanese Patent Laid-Open No. 63-
By performing the meandering correction in the same manner as in Japanese Patent No. 176435, the side plate can be moved in the width direction of the strip, and by controlling the installation interval of the side plate according to the width of the transported strip, the ear can be changed when the width is changed. Prevent problems such as galling.

[0004]

However, in the above-mentioned Japanese Patent Laid-Open No. 176435/1988, in order to increase the pressure of the fluid cushion closer to the strip by this method, the gap between the strip and the side plate should be increased. Need to be small,
The side plate installation interval is not specified. Therefore, even if the side plate is provided, it may not be possible to effectively correct the meandering of the band.

Also, in the apparatus disclosed in Japanese Patent Laid-Open No. 3-20450, the side plate installation interval is not specified. Therefore, even if the movable side plate is provided, the meandering of the band-shaped material may not be effectively corrected.

The present invention is a floater for injecting fluid to float and support a belt-like object. Since it is not in contact with the belt-like object, the belt-like object is not flawed, and even if it is not in contact with the belt-like object. The purpose of the present invention is to provide a floater that floats and supports the belt-shaped material so that the belt-shaped material does not meander.

[0007]

In order to achieve the above object, a floater of the present invention is in contact with a surface of a floater for injecting a fluid to float and support a strip, in parallel with a running direction of the strip. In a belt floater provided with a pair of side plates that are perpendicular to the surface of the floater so as to sandwich the belt, the installation intervals of the side plates are not less than the width of the belt and the width of the belt +
It is characterized in that it has a side plate having a floating height of the strip-shaped object x 8 or less. However, the angle between the side plate and the floater surface is a right angle, but the right angle here means a substantially right angle having a range of 90 ° ± 20 °.

Further, according to the present invention, the belt is in contact with the surface of the floater for floating and supporting the belt-like material, and is movable in the width direction of the belt-like material in parallel with the traveling direction of the belt-like material so as to sandwich the belt-like material. In the floater for strips provided with a pair of side plates, a side plate that can be horizontally moved so that the installation intervals of the side plates are equal to or more than the width of the strips and less than or equal to the width of the strips + the floating height of the strips × 8. It is characterized by having.

[0009]

The functions of FIGS. 3 (A) and 3 (B) were carried out by the present inventors.
It is the result of the experiment which calculated | required the relationship between the clearance gap (mm) between the strip 1 and the side plate 3-1 and the pressure P (mmAq) of the fluid cushion near the side plate.

FIG. 3A is a diagram showing an experimental method.
In the experiment, the position of the strip 1 is fixed and one side plate 3-1 is moved to change the gap α between the strip 1 and the side plate 3-1. Pressure P
Was measured. The same measurement is performed for the flying height h (m
m) was variously changed, and the relationship between the gap α between the strip 1 and the side plate 3-1 and the pressure P of the fluid cushion near the side plate 3-1 was obtained. However, the flying height h is an average value of the results measured at several points on the strip 1.

FIG. 3 (B) is obtained as described above,
6 is a graph showing the relationship between the gap α between the strip 1 and the side plate 3-1 and the pressure P of the fluid cushion near the side plate. The horizontal axis of the graph is the gap α between the strip 1 and the side plate divided by the flying height h, and the vertical axis is the pressure P of the fluid cushion near the side plate 3-1. From this result, the pressure P of the fluid cushion in the vicinity of the side plate 3-1 changes and begins to rise only when the gap α between the strip 1 and the side plate is set to 4 times or less the flying height h, and moreover, The pressure P of the fluid cushion near the side plate 3-1 increases as the gap α between the strip 1 and the side plate 3-1 decreases. However, if the gap α between the strip 1 and the side plate 3-1 is larger than four times the flying height h, the pressure P of the fluid cushion near the side plate 3-1 does not change.

Therefore, the side plates are not more than 4 times the flying height h on both sides of the strip, that is, the installation intervals of the side plates are (width of strip 1) or more, and (width of strip 1 + float of strip 1). Height ×
8) If arranged below, when the strips meander, the pressure of the fluid cushion near the side plate closer to the meandering strips immediately increases, and the strips become higher near the side plates. Inclination, and by this inclination, the component component of the static pressure generated in the jetted fluid in the width direction is generated in the direction opposite to the meandering direction, and the position of the strip 1 is corrected.

On the other hand, the side plates are at least 4 times the flying height h on both sides of the strip, that is, the installation intervals of the side plates are (width of strip 1) + (flying height of strip 1 × 8) or more. If they are arranged, when the strips meander, there is no change in the pressure of the fluid cushion near the side plate to which the serpentine strips approach, and the position of the strips is not corrected.

In order to explain the above things in a little more detail, the installation intervals of the side plates are not less than (the width of the strip) which is a feature of the present invention, and (the width of the strip + the flying height of the strip x 8).
The installation intervals of the following floaters for strips and the side plates are different from those of the present invention (width of strips + floating height of strips x 8).
The difference in action of each side plate will be described with respect to the larger floater for strips.

4A and 4B show side plates 3-1 and 3-.
The installation interval of 2 is a feature of the present invention (width of the strip 1)
Above and ((width of strip 1 + flying height of strip 1 x 8)
It is explanatory drawing of the effect | action of the side plates 3-1 and 3-2 when installed below. FIG. 4A is a cross-sectional view of the float 1 cut in the width direction of the strip 1 when the strip 1 is located at the center of the floater 2 and the pressure distribution of the fluid cushion applied to the strip 1 at that time. Is.

In this case, the distance between the both end portions of the strip 1 and the side plates 3-1 and 3-2 is equal to each other, and the height of the strip 1 is 4 times or less, and the fluid cushion applied to the strip 1 is less than four times. The pressure distribution of is symmetrical with respect to the widthwise center line of the strip 1. Therefore, no moment acts on the strip 1 and the strip 1 does not tilt, so that the strip 1 does not meander.

FIG. 4 (B) is a cross-sectional view of the float 1 cut in the width direction of the strip 1 when the strip 1 meanders rightward by some external force, and a fluid cushion applied to the strip 1 at that time. Is the pressure distribution. In this case, even if the amount of meandering is small, the pressure of the fluid cushion near the side plate 3-1 closer to the meandering strip 1 immediately increases, and conversely, the pressure of the fluid cushion near the side plate 3-2 increases. The pressure drops. As a result, the left-right symmetry of the pressure distribution applied to the strip 1 is broken, a counterclockwise moment acts on the strip 1, and the strip 1 inclines so that it becomes higher as it approaches the side plate 3-1. The component of the static pressure in the width direction generated by the ejected fluid is generated in the direction opposite to the meandering direction, the position of the strip 1 is immediately corrected, and is stabilized in the center of the floater 2.

5A and 5B are side plates 3-1 and 3-.
2 is an explanatory view of the action of the side plates 3-1 and 3-2 when the installation interval of 2 is set to be larger than the present invention (width of the strip 1 + floating height of the strip 1 × 8). .. Figure 5 (A)
3A is a cross-sectional view of the belt 1 cut in the width direction of the belt 1 when the belt 1 is located at the center of the floater 2 and a pressure distribution of a fluid cushion applied to the belt 1 at that time.

In this case, as in FIG. 4A, the strip 1
The pressure distribution of the fluid cushion applied to is symmetrical with respect to the center line of the strip 1 in the width direction. Therefore, no moment acts on the strip 1 and the strip 1 does not tilt, so that the strip 1 does not meander.

In FIG. 5 (B), the strip 1 tentatively meanders to the right by some external force, and the distance between the side plate 3-1 and the end of the strip 1 on the side where the meandering strip 1 approaches. A cross-sectional view of the float 1 cut in the width direction of the strip 1 when the floating height of the strip 1 is four times or more, and a pressure distribution of a fluid cushion applied to the strip 1 at that time.

In this case, the side plate 3 on the side where the strip 1 approaches
Since the distance between -1 and the end of the strip 1 is 4 times or more the flying height of the strip 1, the pressure of the fluid cushion near the side plate 3-1 does not change. Further, the distance between the side plate 3-2 on which the strip 1 is far away and the end of the strip 1 is also four times or more the flying height of the strip 1, so the pressure of the fluid cushion in the vicinity of the side plate 3-2. Does not change. Therefore, the center of pressure is fixed to the center of the floater 2, but the center of tension and gravity of the meandering strip 1 shifts to the left as the meandering, and a clockwise moment acts on the strip 1. As a result, the strip 1 is inclined so that it becomes lower as it approaches the side plate 3-1, and due to this inclination, the component component of the static pressure in the width direction generated by the ejected fluid is generated in the same direction as the meandering direction. The position of the strip 1 meanders further to the left and is not stabilized in the center of the floater 2.

[0022]

【Example】

(Embodiment 1) FIGS. 1 (A) and 1 (B) are examples in which the floater 2 of the present invention is embodied as a strip non-contact traveling direction changing device. FIG. 1 (A) is an overhead view and FIG. 1 (B). FIG. 3 is a sectional view of the floater 2 taken in the radial direction.

In the present embodiment, the strip 1 is a strip having a plate thickness of 0.1 mm and a plate width B of 1000 mm, a flying height h of 5 mm, a tension of 0.2 kg / mm ² , and a threading speed of 50 m / min.
I went through. The floater 2 has a radius of 1200 mm and a width of 140
It is a semi-cylindrical type of 0 mm, and the side plate 3 is on the arc surface of the floater 2.
The installation intervals W of -1, 3-2 are set to be (width B of the strip 1 + floating height h of the strip 1 h × 8) at an interval of 1040 mm and approximately at right angles to the arc surface of the floater 2 -1,3-2
Is installed. In this case, as a result of measuring the amount of meandering,
With 2 mm, a stable strip having less meandering was obtained.

(Embodiment 2) FIG. 2 is an example in which the floater 2 of the present invention is embodied as a non-contact advancing direction changing device for a strip in which the width of a strip is changed, and (A) is an overhead view,
(B) is a cross-sectional view of the floater 2 taken in the radial direction.

In the present embodiment, the strip 1 is a strip having a plate thickness of 0.1 mm, a flying height h of 5 mm and a tension of 0.
It is passed at a speed of ² kg / mm ² and a speed of 50 m / min, but the plate width B is 1000 mm to 700 mm, or 700 mm.
To 1000 mm. Floater 2 has radius 1
It is a semi-cylindrical type with a width of 200 mm and a width of 1400 mm, and on the arc surface of the floater 2, a pair of movable side plates 3-1 and 3-2 are installed at a substantially right angle to the arc surface of the floater 2 and the side plates are Is connected to the drive devices 4-1 and 4-2, and the side plate 3-
1,3-2 spacing W can be changed and strip width B is 1
When the strip width B was 700 mm, it was passed at an interval of 1040 mm when it was 000 mm, and when it was 700 mm, it was passed at an interval of 740 mm.
In this case, as a result of measuring the amount of meandering, a stable strip having a small amount of meandering of ± 2 mm was obtained.

In the second embodiment, the timing of changing the distance between the side plates 3-1 and 3-2 by the driving devices 4-1 and 4-2 is as follows.
It was done manually by visual inspection. Although not shown in the figure, instead of this method, a width detector (for example, an optical width meter) that detects the width of the strip 1 and emits the size of the width as an electric signal is used on the way of the travel route of the strip 1. In addition, it is provided between the unwinding part of the band and the floater 2. Further, a speedometer for detecting the conveying speed of the strip 1 and emitting it as an electric signal is provided.
Further, receiving the width information from the width detector and the speed information from the speedometer, the width change point of the strip 1 is set to the floater from the distance from the installation position of the width detector to the floater 2 and the speed information from the speedometer. The arrival timing is calculated, and the distance between the side plates 3-1 and 3-2 is set to (width of strip 1) or more and (width of strip 1 + flying height of strip 1) from the width information of the width detector. 8 × or less, the driving devices 4-1 and 4-2 are arranged at the timing when the width change point of the strip 1 reaches the floater.
A control device is provided for controlling the operation. Width detector,
The speed detector and the control device detect the width change of the strip 1 and the timing at which the width change point reaches the floater by the width detector and the speedometer in advance, and the control device drives the drive devices 4-1 and 4.
-2 may be automatically opened and closed according to the width of the strip 1 passing through the floater 2. The drive devices 4-1 and 4-2 used in the present invention may be ordinary mechanical devices (for example, an air cylinder, a hydraulic cylinder, a gear type actuator, etc.).

(Comparative Example) Although not shown in the figure, as a comparative example of the present invention, unlike the present invention, the installation interval W of the side plate is set.
Was set to be larger than (the width B of the strip + the flying height of the strip × 8), the floater 2 for the strip was implemented as a non-contact traveling direction changing device for the strip.

In this embodiment, the strip 1 is a strip having a plate thickness of 0.1 mm and a plate width B of 1000 mm, a flying height h of 5 mm, a tension of 0.2 kg / mm ² , and a plate passing speed of 50 m / min.
Went through. The belt floater 2 has a radius of 1200 mm,
It is a semi-cylindrical type with a width of 1400 mm, and on the arc surface of the floater 2, the installation distance W of the side plates is (width B of strip 1 + strip 1
The side plates are installed at an interval of 1100 mm so as to be at least the floating height h × 8) above and substantially perpendicular to the arc surface of the floater 2. In this case, as a result of measuring the amount of meandering, it was ± 42 mm, and the strip did not pass through the center of the floater 2.

[0029]

According to the floater for strips of the present invention,
The amount of meandering strips is small and can be conveyed stably. Moreover, according to the floater for strips of the present invention, the strips can be stably conveyed even when the width of the strip is changed.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a first embodiment in which the floater of the present invention is implemented as a strip non-contact traveling direction changing device.

FIG. 2 shows the floater of the present invention implemented as a non-contact advancing device for changing the width of a strip.
7A and 7B are explanatory diagrams of a second embodiment.

FIG. 3A is a diagram showing an experimental method of an experiment in which a relationship between a gap α between a strip and a side plate and a pressure P of a fluid cushion near the side plate is obtained. (B) is an experimental result showing the relationship between the gap α between the strip and the side plate and the pressure P of the fluid cushion near the side plate.

4 (A) and 4 (B) are views for explaining the action of the side plate of the floater for a strip according to the present invention, showing a cross-sectional view of the floater cut in the width direction of the strip, and the cross-section of the strip at that time. It is a pressure distribution of a fluid cushion.

5 (A) and 5 (B) are views for explaining the action of the side plate of the floater for a belt, which is not the present invention, and a cross-sectional view of the floater cut in the width direction of the belt, It is the pressure distribution of such a fluid cushion.

[Explanation of symbols]

 1 Belt 2 Floater 3-1 (3-2) Side plate 4-1 (4-1) Side plate drive device

Claims (2)

[Claims] 1. A belt (1) is in contact with the surface of a floater (2) which jets a fluid to float and support the belt (1), and sandwiches the belt (1) in parallel with the running direction of the belt (1). In the floater for strips provided with a pair of side plates (3-1) and (3-2) substantially perpendicular to the floater surface, the side plates (3-
The installation intervals of 1) and (3-2) are equal to or more than the width of the strip (1), and the width of the strip (1) + the flying height of the strip (1) ×
A floater for strips having a side plate of 8 or less. 2. A belt (1) is in contact with the surface of a floater (2) that jets a fluid to float and support the belt (1), and sandwiches the belt (1) in parallel with the running direction of the belt (1). , A pair of side plates (3-1) movable in the width direction of the strip (1),
In the belt floater provided with (3-2), the installation intervals of the side plates (3-1) and (3-2) are not less than the width of the belt (1) and the width of the belt (1) + Band (1)
The floater for strips, which has a side plate that can be moved horizontally so that the floating height is less than or equal to 8.