JPH0826551A - Direction changing drum for sheet-shaped object - Google Patents

Abstract

PURPOSE:To attain a stable direction change by providing compressed air jet holes in a contact part surface with a sheet-shaped object, so as to prevent changing a form, meandering, etc. of the sheet-shaped object. CONSTITUTION:A cylindrical drum main unit 1, closing one end to provide in the other end a compressed air introducing port 3, is provided to provide many slit-shaped jet holes 2 drilled in this drum surface in a part where a sheet-shaped object 4 is wound around to the drum surface. This drum main unit 1 is arranged in a direction of crossing at almost 45 deg. relating to an original advancing direction of the sheet-shaped object 4, and it is wound in about half circumference along the drum surface so as to draw out the sheet-shaped object 4 in a lateral direction almost at a right angle relating to the original advancing direction. By supplying pressure-adjusted compressed air to the drum main unit 1 from the introducing port 3 jetted from the slit-shaped jet holes 2, the sheet-shaped object 4 is floated from the drum surface, to change the direction by low tension.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device and a method for diverting the course of a sheet-shaped article in a transverse direction at right angles or in parallel to the opposite direction in the step of treating the sheet-like article. It is a thing.

[0002]

2. Description of the Related Art In the case where a plurality of treatments are continuously performed on a sheet-like material, it is not necessary to change the traveling direction of the sheet-like material if the respective processing devices are arranged on a straight line. Due to the above problems, it may not be possible to arrange the equipment for each process to be continuously processed in a straight line, or it may be necessary to guide the sheet-like material to another processing equipment from the middle of the process. In such a case, it is necessary to change the direction of the sheet-like material, but the vertical direction change can be easily performed by winding it on a roll. In order to change the direction to the opposite direction, a stainless steel plate or the like bent into a U shape or a drum is arranged at an angle of 45 ° with respect to the traveling direction of the sheet-like object, and the surface of the steel plate or the like is aligned. By doing so, the traveling direction of the sheet-like material is changed to a right angle.

[0003]

When a sheet-like material is turned along a U-shaped bent steel plate, roll, or the like in the transverse direction at right angles, the sheet-like material is rubbed on the surface of the steel plate and is, so to speak, a so-called ladder. Since the direction is changed in the state of being crushed, a large tension is applied to the sheet-shaped material. Even when the sheet is rotated along the roll, the direction of rotation of the roll and the traveling direction of the sheet are different, so the sheet is also rubbed and squeezed on the surface of the roll, resulting in a large tension. Takes. Although there is no problem as long as it is a sheet material with a large strength such as a woven fabric, in the case of a sheet material with a relatively small strength such as a web or a nonwoven fabric before the entanglement treatment, this tension causes a large change in shape, especially a large elongation. And adversely affect the processed product. Further, if the frictional force is not uniform, the sheet-like material is likely to meander, the ears are stretched to form a so-called wakame-like shape, and vertical wrinkles are likely to occur. Further, according to the conventional method, a sheet-like material having a wet state or an adhesive surface has a too large friction and cannot be turned in the lateral direction. The object of the present invention is to change the direction of the sheet-like material,
Including wet and sticky sheet-like materials, the sheet-like materials are not subjected to excessive external force such as frictional force, and the direction is changed with a low tension to change the shape of the sheet-like materials and meander. It is to provide a method of preventing and stably changing direction.

[0004]

DISCLOSURE OF THE INVENTION The present invention is a direction changing drum which is provided so as to intersect with a traveling direction and turns a sheet-like object to change its direction. The present invention relates to a direction-changing drum for a sheet-like material having compressed air ejection holes, and the present invention also relates to a sheet-like material for winding a sheet-like material around a direction-changing drum provided so as to intersect the traveling direction to change the course. In the method of changing the direction of an object, a method of changing the direction of a sheet-like object is performed in which compressed air is ejected from a compressed air ejection hole provided in a direction-changing drum so that the sheet-like object floats above the surface of the drum.

[0005]

The sheet material targeted by the present invention is a web before entanglement treatment, a entangled non-woven fabric, a non-woven fabric impregnated with a resin, a woven or knitted fabric, etc. Highly effective when used for the previous web or non-woven fabric. The direction changing drum of the present invention may have a cylindrical shape, or may have a structure in which a conventional stainless steel plate or the like is bent in a U shape.

The direction-changing drum of the present invention has compressed air ejection holes on the surface with which the sheet-like material comes into contact, and the compressed air is ejected from the ejection holes to float the sheet-like object from the surface of the direction-changing drum. And turn around. Here, the state in which the sheet-like material is floated from the drum surface does not necessarily mean that the sheet-like material is completely floated from the drum surface, and is a state in which the frictional force that causes the morphological change of the sheet-like material does not substantially act. If it is possible to do, even if the sheet-like object is in a state of slightly contacting the drum surface,
It doesn't matter. In such a state, the ejection pressure (ejection amount) of the compressed air is monitored while monitoring the tension applied to the sheet-shaped material.
This can be confirmed by the fact that the tension sharply decreases as the value of T increases.

If the compressed air ejection hole is a cylindrical or semi-cylindrical drum, one end can be closed, a compressed air introduction port can be provided at the other end, and the ejection hole can be directly provided on the drum surface. Further, in the case of a structure in which a stainless steel plate or the like is bent in a U shape, a pipe for compressed air and a jet hole are provided inside the drum so as to correspond to the opening provided on the drum surface.
It is also possible to eject compressed air from the opening on the surface of the drum.

The shape, size, quantity, and arrangement of the compressed air ejection holes are determined by the air permeability, thickness, flexibility and strength of the sheet material.
There is no particular limitation as long as the sheet-like material can be floated from the surface of the drum in the above-mentioned state, although it depends on the degree of elongation. The shape of the ejection hole can be any shape such as an elongated slit shape, a circular shape, or a rectangular shape. Further, the drum surface can be formed of a mesh-like structure such as a wire net, but since the frictional resistance increases when the sheet-like material comes into light contact, the surface is preferably smooth. When the distance between the compressed air injection holes is large or the size of the injection holes is small, it is necessary to increase the injection pressure (injection amount) in order to float the sheet-like material, and the sheet-like shape is locally applied. Since a large force acts on the object, the sheet material having a thin strength and low strength is likely to change its shape. Therefore, it is not preferable to increase the distance between the injection holes or reduce the size of the injection holes. As a guide, the slit width is 5 in the case of slit-shaped injection holes.
It is preferable that the slit spacing is about 20 mm, the slit spacing is about 30 mm to 300 mm, the diameter is 10 mm to 30 mm in the case of circular injection holes, and the spacing is about 10 mm to 100 mm. The injection amount of compressed air is 5 to 100 Nm ^{3 with} respect to the drum surface area.
/ M ² is a rough guideline and the traveling state of the sheet-like material is observed and adjusted appropriately. In particular, in the case where the sheet-like material is a web before the entanglement treatment, it should be noted that the morphological change will be large if the injection amount is increased.

There is no particular problem with the direction of injection of the compressed air, which is normal to the surface of the drum, but the inclined sheet is jetted toward the advancing direction of the sheet to stabilize the traveling of the sheet. . In addition, the injection holes on the outside of the widthwise center line of the sheet-like material make the jetting direction obliquely outward toward the advancing direction of the sheet-like material, so that traveling stability is achieved even for a sheet-like material that is particularly flexible and easily wrinkles easily. Highly effective. Also,
The meandering of the sheet-like material can be prevented by dividing the injection hole into several blocks in the width direction and the length direction of the sheet-like material and finely adjusting the injection amount of the compressed air in each block.

[0010]

The present invention will be further described with reference to the drawings. FIG.
[Fig. 3] is a schematic view of an example of a state in which a sheet-like material is turned by the turning drum of the present invention, a is a plan view, and b is an elevation view seen from the direction a. In the figure, reference numeral 1 denotes a cylindrical drum main body, one end of which is closed and the other end of which is provided with a compressed air introduction port 3. Reference numeral 2 is a slit-shaped compressed air ejection hole provided on the drum surface, and is provided in a portion where the sheet-like material 4 is wound around the drum surface. The arrow indicates the traveling direction of the sheet-shaped material. The drum 1 is attached in a direction intersecting the original traveling direction of the sheet-like material 4 by about 45 °. The sheet-like material 4 is wound around a half surface of the drum, and is drawn out in a lateral direction substantially perpendicular to the traveling direction. Compressed air whose pressure is adjusted by a pressure regulator (not shown) is supplied into the drum from the compressed air introduction port 3 and is ejected from each slit-shaped injection hole 2 to lift the sheet-like material 4 from the surface of the drum 1. Let Although a cylindrical drum is used in the figure, a semi-cylindrical drum may be used.

FIG. 2 is a schematic view showing another embodiment of the present invention, in which a is a plan view and b is a sectional view taken along the line a '. In this embodiment, the direction changing drum 11 is made of a stainless steel plate having a U-shaped cross section, and the compressed air supplied from the compressed air supply port 13 passes through the compressed air pipe 15 from the pipe tip to the drum surface. The compressed air is ejected from the compressed air ejection hole 12. In this way, if the method of directly supplying the compressed air to the ejection holes by the pipes is adopted, the ejection pressures of the respective pipes can be changed independently by dividing the pipes into several blocks.

The parallel running of the sheet-like material in the opposite direction can be easily performed by combining two sets of the drums of the present invention and changing the course of each of the drums at right angles. Further, by reversing the course changing direction in the second set of drums, the traveling direction of the sheet-shaped material can be laterally shifted to be parallel to the original direction, so that the sheet-shaped materials are adjacent to each other during the processing. It is also possible to supply to a processing device.
Further, the course of the course of the sheet-like material is not limited to the right-angled lateral direction, and it is needless to say that it can be performed at an angle other than the right-angled direction by changing the intersecting angle between the drum and the original traveling direction of the sheet-like material.

[0013]

EFFECTS OF THE INVENTION By using the direction changing drum of the present invention, a relatively strong sheet-like material such as a web or non-woven fabric before entanglement treatment, a sheet-like material having a wet state or a surface having an adhesive property, etc. Further, the sheet-like material can be directionally changed with a low tension without applying an external force such as a frictional force, so that the sheet-like material can be prevented from changing its shape and meandering, so that the sheet can be stably changed in direction. Therefore, when various treatments are continuously performed on the sheet-like material, the transfer of each treatment step is not limited to a straight line, and can be changed to a desired direction such as a right-angled lateral direction or an inverted reverse direction. The selection range is widened, and it is also possible for the sheet-like material being processed to be loaded between adjacent processing devices, so that the selection range of the combination of processing methods and conditions is widened. It is particularly useful in the manufacturing process of leather-like sheets and the like, which involves treatment processes such as impregnation / application of resin solution and coagulation.

[Brief description of drawings]

FIG. 1 is a schematic view of an embodiment of the present invention, in which a is a plan view and b is a side view seen from the direction a.

2A and 2B are schematic views of another embodiment of the present invention, in which a is a plan view and b is a cross-sectional view taken along line ′ ′.

[Explanation of symbols]

 1, 11 Directional changing drum body 2, 12 Compressed air ejection hole 3, 13 Compressed air supply port 4 Sheet-like material 15 Compressed air piping

Claims (2)

[Claims] 1. A direction-changing drum which is provided so as to intersect with a traveling direction and turns a sheet-like object by turning the sheet-like object, the sheet-like object having a compressed air ejection hole on a contact surface thereof. A drum for changing the direction of objects. 2. A method of changing the direction of a sheet-like material by winding a sheet-like material around a direction-changing drum provided so as to intersect with a traveling direction, wherein a compressed air ejection hole is provided in the direction-changing drum. A method for changing the direction of a sheet-like material, which comprises changing the direction of the sheet-like material by ejecting more compressed air and floating the sheet-like material above the surface of the drum.