JPH08245028A - Film floating direction changing device - Google Patents

Abstract

PURPOSE: To float a film uniformly so as to change the direction positively in a contactless state by forming the cross-sectional form of a direction changing member into specific shape, and forming the entering side surface and detaching side surface of a film conveying body into linear faces parallel with a film conveying direction. CONSTITUTION: When air is supplied from the air supply port 6 of a fixed shaft 1, the air is blasted from a group of air holes 3a of a metal sheet 3 but partially shut off by cord material 5 wound around the surface, so that the internal blast pressure rises. When the blast pressure of this compressed air further rises, the pressure is blasted in the high state from the clearances of the cord material so as to float conveyed film material F to convey it. In a direction changing member, the corner angle part for changing the conveyed direction of the conveyed film material F by 90 deg., for instance, is formed into circular arc shape, and a linear part 4a is formed at a base 4, parallelly with the conveyed direction of the conveyed film material F. The conveyed film material F is thereby floated uniformly and direction-changed positively in a contactless state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film floating direction changing device for transferring a thin film material such as a film, a metal foil, a woven fabric, and a paper by air pressure and changing the direction in a non-contact state while conveying the film.

[0002]

2. Description of the Related Art Hollow cylindrical rolls are used in conventional film, metal foil, woven, paper, etc. film manufacturing processes and surface coating processes where the guide members are turned in a non-contact direction while being conveyed at high speed. To form a pipe,
There is a thing in which a gas ejection hole is formed only on a portion of the surface that comes into contact with an object to be conveyed. Further, a cylinder is perforated or provided with voids such as a wire mesh on the surface, for example, a cylindrical material such as a porous material, porous sintered metal or porous casting is used. . In these cylindrical members, compressed air such as gaseous air is discharged from a myriad of holes on the surface, and a film or the like as a material to be conveyed is diverted or conveyed while being floated on the surface in a non-contact manner.

[0003]

However, since the true cylindrical hollow body has a circular cross section, the levitation force of the conveyed product due to the jetting force of gas from the innumerable holes is not uniform along the roll surface. However, as shown in FIG. 5 (A), the flying height of the conveyed product is different at the direction changing portion (corner portion), and in particular, the discharge amount and pressure of the compressed air are increased on both side portions BB of the cylindrical roll. However, the floating amount of the film conveyed product is small, and the conveyed product comes into contact with or separates from the roll surface, so that the conveying process is incomplete. The reason for this is that the amount of air discharged is concentrated in the center of the conveyed product and in the central part of the roll conveyance surface, and this air is discharged from the left and right ends of the conveyed product and the four points of the inlet and outlet. Since the roll surface length, which is a portion parallel to the conveyed object, is sufficiently long at the end portion, there is no effect, and the portion where air is exhausted suddenly expands near the entry portion and the desorption portion.
The flow velocity of A-A in FIG. 5A and BB in FIG.
It is considered that the C-C and D-D portions tend to have a negative pressure and are sucked to the direction-changing roll side. In addition, since it is difficult to manufacture a horizontally long conveyance roll using the above-mentioned porous foam, a short conveyance roll is formed and these are spliced together to form a long conveyance roll. Since the seam is formed during the molding of the transfer roll in this way, the discharge state of the compressed air at this seam portion is unstable,
There was a similar problem because the roll cross section was circular.

The present invention has been made in view of the above problems, and an ultrathin film is usually conveyed by a tubular contact type guide roll, but wrinkles are caused when a large tension is applied. Further, when the tension is lowered, the moment of inertia of the guide roll and the mechanical loss of the transport control system become conspicuous, which makes it difficult to control the transport properly, and the transported object becomes a problem. An object of the present invention is to effectively convey a thin film-like conveyed product to a guide roll without any trouble when the conveyed product is easily scratched or the guide roll is contaminated, or when it is desired to change the direction. It is an object of the present invention to provide a film floating direction changing device that makes the cross-sectional shape of an ellipse, a semi-ellipse, a semi-circle, or a circular arc convey without contact. Another object of the present invention is to provide a film floating direction changing device in which the cross-sectional shape of the effective floating portion of the direction changing roll is a semi-ellipse, an ellipse or a semi-circle, and an arc surface, and both end sides are substantially linear. .

[0005]

In order to solve the above-mentioned problems, the present invention comprises a film conveying surface provided with a large number of gas ejection holes to form a horizontally elongated hollow body, and both shaft ends of the apparatus main body. In a film levitation transport device that is fixed, connects a supply pipe that supplies a compressed fluid to the hollow body of at least one shaft end, blows air from the gas ejection holes of the film transport surface, and transports the film in a non-contact state, The cross-sectional shape of the direction changing member arranged at the direction changing portion of the film transporting guide is a semi-ellipse, an elliptic arc or a semi-circle, and a corner of an arc surface. The release-side surface was formed as a linear surface substantially parallel to the film transport direction.

Further, an object of the present invention is to provide a film transfer surface by forming a film transporting surface by stretching a thin plate having a large number of gas ejection holes between flanges fixed to fixed shafts at both ends. The purpose can be achieved. Furthermore, the thin plate having a large number of gas ejection holes may be formed of a metal plate, a sintered metal plate, a porous metal plate, a porous synthetic resin plate, or the like, and is provided with a large number of gas ejection holes in the direction changing portion. Alternatively, the cord-like material may be wound around the film transport surface on the surface of the thin plate to form a spiral gap having a constant pitch on the surface, or the cord-like material may be formed of a metal wire.

[0007]

[Operation] In the film floating direction changing device of the present invention, the cross-sectional shape of the direction changing member is a semi-elliptical shape, an elliptic arc or a semi-circle, and a corner portion of an arc surface, and these film conveying surfaces are separated from the entrance side and the detached side. Since a straight part is formed on the side of the film substantially parallel to the film transport surface, the pressure of the compressed air of the gas discharged from the inner hollow part of the direction changing part is uniform over the entire transport surface, and the film floating amount is uniform. Then, the non-contact state body is maintained and conveyed in a stable state, and the thin film is conveyed without wrinkles or the like. When this direction changing member is used in a device for cutting a long object, in particular, a large number of levitation conveyors are arranged in a staggered manner and used as a non-contact accumulator by accumulating a large amount of conveyed material at a location,
The upper and lower floating pitches can be changed as shown in FIG. At this time, it is possible to stay for a certain period of time, during which connection work and disconnection work can be performed. Therefore, it is possible to use it as a spacer for a drying oven or the like by properly fixing the vertical pitch without stopping the transfer line.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partial sectional front view of a first embodiment of the film floating direction changing device of the present invention. FIG. 2 is a partially enlarged sectional view of FIG. 1, and FIG. 3 is a sectional view of an embodiment of a corner portion of the direction changing member of the present invention. FIG. 4 is a sectional view of a second embodiment of the turn portion of the direction changing member of the present invention. Figure 5
FIG. 6 is an explanatory view of a conventional direction changing member. 6A and 6B show a direction changing member of a third embodiment of the film floating direction changing device of the present invention, FIG. 6A is a side view, and FIG. FIG. 7 is a perspective view of a fourth embodiment in which the slits of the direction changing member of FIG. 6 are filled with a porous material. FIG. 8 shows a fifth embodiment in which a wire is wound around the surface of the direction changing member of FIG.
It is a perspective view of an Example. FIG. 9 is a schematic view showing a usage mode of the U-turn portion on the same plane in the transport device of the present invention. FIG. 10 is a schematic view of the case where the turning device of the present invention is used for changing a line. FIG. 11 is a schematic view of another method for changing the line of the turning device of the present invention. FIG. 12 is a schematic diagram showing a mode of use as an accumulator of the present invention. FIG. 13 is a schematic view of reversing a film conveyed product using the direction changing device of the present invention. FIG. 14 is an enlarged surface view of a state in which the twisting yarn is wound around the surface of the turning portion of the turning device of the present invention.

Embodiments of the present invention will be described below with reference to the drawings. Innumerable pores 3a, 3a between the flanges 2 and 2 that are fitted with fixed shafts 1 and 1a provided on both sides and fixed with bolts
・ Put a thin metal plate 3 with holes on both flanges 2, 2
Is fixed to the outer surface of the base with screws or the like, and the edge is also tacked to the base 4. The fixed shaft 1 is hollow, has air supply holes 6 on one side or both sides, and air is supplied from a blower (not shown). The metal thin plate 3 may be an ordinary punching metal, but a thin plate or metal formed of a porous material such as a porous foam, a porous thin plate of sintered metal, or a net-like metal plate may be used. You can also The thin metal plate 3 is formed in an arc shape along the shapes of the flanges 2 and 2, and the entrance side and the desorption side of the conveyed product are formed linearly in parallel with the film conveying direction.

Reference numeral 5 denotes a cord-like material which is wound around the surface of the metal thin plate 3 at a constant interval and at the same pitch. There is no problem if it is a cord-like shape, but a metal wire such as stainless steel is preferable. , A piano wire, or a string-like object made of synthetic resin. Further, a wire of a rectangular thread (ribbon shape) may be wound at a constant pitch, and a round thread or a ribbon-shaped string whose diameter is changed in the longitudinal direction may be wound on the surface. Even if the uneven string-like material 5 is wound tightly, a gap can be similarly formed between the strings. In this case, a thicker one is preferable.

FIG. 3A is a cross-sectional view of various first embodiments of the direction changing member in which the corner portion for changing the conveying direction of the film-like conveyed object F by 90 degrees is formed into an arc. Reference numeral 4a is a linear portion of the base 4 formed parallel to the transport direction of the film transport material F. A string-like material 5 is wound around the surface of a thin metal plate 3 in which numerous holes 3a are formed in a flange 2 of a fixed shaft 1. The air supplied to the inside of the hollow is ejected in the direction of the arrow to levitate and convey the film conveyed material F at a constant interval.
FIG. 4A shows a second embodiment in which the direction changing member has a semi-elliptical cross section. 3 (B) and 4 (B), a sintered metal plate is attached as a thin metal plate 3 between the flanges 2 and 2,
In this embodiment, the flanges 2 and 2 and the base 4 are fixedly formed.

3 (C) and 4 (C), the cross-sectional shape of the base 4 is made into a semi-elliptical or semi-circular shape with a corner portion or a cross section in which the direction changing portion is formed into an arc or an elliptic arc, and a glass bead in the middle. In this example, two mesh nets filled with ceramic particles are stretched to form a porous inner wall, the film transport surface is covered with perforated outer plates, and both ends are fixed to the base 4. When using such fine particulate filler, if clogging occurs during use, take out only the fine particulate matter,
It can also be washed and reused. Further, the pressure loss of the compressed air to be ejected can be controlled by changing the size and the filling amount of the fine particles. As a result, the ellipse or the elliptic arc was good (the surface was raised to the average). FIG.
4 (D) and FIG. 4 (D) show a case where a porous foam (sponge) or the like is attached to the inside of the metal thin plate 3 on the inner wall surface of the metal thin plate, and by doing so, a large pressure loss is obtained. As the porous foam, a foam of polyvinyl alcohol (PVA), polyurethane resin, rubber or other resin can be used.

In FIGS. 3 and 4, the surface of the direction changing member uses a net-like or porous material, and the cross-sectional shape is formed into an elliptical, elliptic arc, semicircle, or arc-shaped corner. Although the description has been made with the straight parts provided on the entrance side and the carry-out side of the conveyed object, the third embodiment of this direction changing member changes the direction as shown in FIGS. 6 (A), 7 and 8. The air-jetting portion of the member has a mesh shape, and instead of the porous material, a large number of parallel slits S extending at right angles to the conveying direction are formed on the surface, and the cross-sectional shape is a semicircle. The semicircular direction changing member having the slit S has the ventilation chambers R arranged on both sides, and the compressed fluid is blown into the through hole P in the central portion and jetted from the slit S on the surface. Thus, even if the compressed fluid such as air is ejected from the slit S, the same effect as that of the first embodiment described above can be obtained. In this case as well, the surface can be coated with a mesh or porous material formed of a metal, resin, cloth, or paper rubber material.

In the fourth embodiment shown in FIG. 7, the porous foam B is filled in the slits of the direction changing member in which a large number of slits are arranged in parallel on the surface formed by extrusion molding of FIG. When the suction effect such as clogging decreases, it is possible to perform maintenance only by replacing the porous foam without removing the direction changing member.
Further, the fifth embodiment shown in FIG. 8 is obtained by winding a linear object W such as metal or fiber thread on the surface of the direction changing member (third embodiment) of FIG. 6 with a gap provided on the surface. This product is easy to manufacture and can sufficiently achieve the initial purpose.

9 and 13 show a mode of use of the direction changing member of the present invention. FIG. 9 shows an embodiment in which the transport direction is on the same plane and the film transport material F is U-turned on the same plane. . FIG. 10 shows an embodiment of the direction changing device of the present invention as a direction changing member when a line is changed. FIG. 11 is an embodiment of another method for changing the line of the turning device of the present invention. FIG. 12 shows a film conveyed product F.
In the above accumulator, a plurality of the direction changing members of the present invention are arranged. It can be used as a spacer by adjusting the distance between the direction changing members. FIG. 13 shows an embodiment as a direction changing member that reverses the conveying surface of the film conveyed object F.

FIG. 14 is an enlarged view of the surface obtained by winding a twisted yarn as the string-like material 5 wound around the surface of the metal thin plate 3 having the innumerable pores 3a of FIG. 1 around the surface of the metal thin plate 3. In the case of closely winding, voids 7 for ejecting pressurized air are formed in some places, and the ejection amount from the pores 3a is controlled. In this case, when the twisted wire is used, it is not necessary to wind it at a constant pitch, and therefore, it is not necessary to form a groove or the like, so that it can be manufactured at low cost. The size of the pores 3a can be controlled by appropriately selecting the diameter of the stranded wire and the stranded wire material. Stainless steel wire is suitable as a material for the stranded wire material, but other synthetic fibers, cotton, or other twisted fibers may also be used.

The film floating direction changing device of the present invention as described above will be explained based on an embodiment shown in the drawings. FIG.
When air is sent from the air supply port 6 of the fixed shaft 1 shown in, the air is ejected from the group of pores 3a of the thin metal plate 3, but it is partially blocked by the string-like material 5 wound on the surface. The pressure rises. When the jet pressure of the compressed air is further increased, the compressed air is jetted in a state where the pressure is higher than the gap between the string-like objects 5 and 5, and the film conveyed object F is levitated and conveyed. For example, the same applies to the first embodiment used for the corner portion of FIG. 3 and the second embodiment used for the turn portion shown in FIG. Further, in the case of the direction changing member in which a large number of slits are formed on the surface of the base 4 manufactured by extrusion molding as in each of the embodiments shown in FIGS. 6, 7 and 8, the air pressure-fed from the fixed shaft 1 is used. Passes through the through hole P and flows into the slit S from both sides of the direction changing member,
It will be ejected from the slit S.

By increasing the internal pressure of the direction changing portion, the jetting force of the whole becomes uniform and the jetting pressure to the surface of the film conveyed material F becomes equal. Therefore, an even pneumatic layer is formed over the entire surface of the string-like material 5. When the cord-like material 5 is wound, if the cross-section is circular, the direction changing device can be rotated to form grooves with a constant pitch. It is possible to form grooves having the same pitch on the thin plate 3 and to wind the string-like material 5 while fitting the string-like objects 5 into the surface grooves. It is preferable that the string-like material 5 has a thickness of about φ0.2 to 5.0. In addition, the transported film F
In the case of conveying a sheet having a width of 200 mm to 3 m, a preferable result was obtained when the diameter was φ0.6 to 2.0.

[0019]

Since the present invention is configured as described above, it has the following effects. The direction changing portion of the film floating direction changing device of the present invention forms a corner portion having a semi-elliptical shape, an elliptic arc, a semicircle, an arc or the like, and a straight portion parallel to the conveying direction on the entrance side and the desorption side of the conveyed object. Since the pressure fluid ejected from the inside is evenly ejected to the back surface of the conveyed product, and this air layer is constant, damage to the conveyed product can be prevented and a stable condition is maintained. The body can carry a change of direction. Further, in the case where a large number of parallel slits are formed on the surface as shown in FIG. 6 and the like, a piercing process is not required, and aluminum, zinc or their alloys, or synthetic resin can be easily extruded and molded. It can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional front view of an embodiment of a film floating direction changing device of the present invention.

FIG. 2 is a partially enlarged sectional view of FIG.

FIG. 3 is a cross-sectional view of an embodiment of a corner portion of the film floating direction changing device of the present invention.

FIG. 4 is a sectional view of a second embodiment of the turn portion of the levitating device of the present invention.

FIG. 5 is an explanatory view of a conventional direction changing member.

6A and 6B show a direction changing member of a third embodiment of the film floating direction changing device of the present invention, wherein FIG. 6A is a side view and FIG. 6B is a sectional view taken along line I-I of FIG.

FIG. 7 is a perspective view of a fourth embodiment in which the slit of the direction changing member of FIG. 6 is filled with a porous foam.

8 is a perspective view of a fifth embodiment in which a wire is wound around the surface of the direction changing member of FIG.

FIG. 9 is a schematic view showing a usage mode of a U-turn portion on the same plane in the transport device of the present invention.

FIG. 10 is a schematic view of the case where the turning device of the present invention is used for changing a line.

FIG. 11 is a schematic view of another method of changing the line of the turning device of the present invention.

FIG. 12 is a schematic view showing a mode of use as an accumulator of the present invention.

FIG. 13 is a schematic view of reversing a film conveyed product using the direction changing device of the present invention.

FIG. 14 is an enlarged surface view showing a state in which a twisting yarn is wound around the surface of the direction changing portion of the direction changing device of the present invention.

[Explanation of symbols]

 1: Fixed shaft 2: Flange 3: Metal thin plate 4: Base 5: String-like material 6: Air supply port 7: Gap F: Film transport material S: Slit R: Ventilation chamber P: Through hole W: Wire

Claims (6)

[Claims] 1. A film-conveying surface is provided with a large number of gas ejection holes to form a horizontally elongated hollow body, both shaft ends are fixed to a main body of the apparatus, and a compressed fluid is contained in the hollow body of at least one shaft end. In a film levitation transport device that connects a supply pipe to supply air, blows air from the gas ejection holes on the film transport surface, and transports the film in a non-contact state, it is arranged at the direction change part of the transport guide for levitation transport of the film. The cross-sectional shape of the direction changing member is a semi-ellipse, an elliptic arc or a semi-circle, and a corner surface of a circular arc surface, and the entrance side surface and the exit side surface of the film carrier are substantially straight surfaces. A film floating direction changing device characterized by forming a film. 2. The direction changing member is characterized in that a thin plate having a large number of gas ejection holes is stretched between flanges fixed to fixed shafts at both ends to form a film conveying surface. The film floating direction changing device according to claim 1. 3. The thin plate having a large number of gas ejection holes is one selected from a metal plate, a sintered metal plate, a porous metal plate and a porous synthetic resin plate. 2. The film floating direction changing device described in 2. 4. The direction changing member is provided with a large number of ventilation slits extending in the width direction of the transport film and parallel to the central axis, and the whole is formed by extrusion molding. 1. The film floating direction changing device according to 1. 5. A cord-like material is wound around the film transporting surface of the surface of a thin plate having a large number of gas ejection holes in the direction changing portion, and a spiral gap having a constant pitch is formed on the surface. The film floating direction changing device according to claim 1, 2, 3, or 4. 6. The film floating direction changing device according to claim 5, wherein the string-like material is a metal wire.