JPH0632503A - Noncontact conveying device - Google Patents

Abstract

PURPOSE:To stably convey a web without meandering a noncontact conveying device in which a continuously running web is supported by gas jetted from blow-off holes, by tiltably supporting gas blow-off boxes for changing the running direction of the web, which is provided on each or one of opposite sides thereof with a side guide. CONSTITUTION:In a noncontact conveying device using gas, for conveying a web, gas blow-off boxes 1 are supported so as to be tiltable about a tilting fulcrum 4 widthwise of the web, and accordingly, the tilt thereof is carried out by actuating a hydraulic cylinder provided at one end of the boxes 1. Further, flanges 2, 2 (side guides) are provided on both sides of the boxes 2. When the web meanders greatly, the boxes 1 are tilted so as to eliminate the meandering while the flanges 2 eliminate fine meandering.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contactless transfer device,
More specifically, the present invention relates to a contactless transfer device having good transfer stability.

[0002]

BACKGROUND OF THE INVENTION Many techniques have been disclosed as a technique for improving the stability of a contactless transport device, particularly transport. For example, JP-B-57-11971, JP-B-61-2676, and JP-A-62-157165.
No. 62-185666, No. 63-176435, JP-A 1-110464
No. 3-31465 and the like.

Various methods have been considered as means for improving conveyance stability, for example, Japanese Utility Model Publication No. 57-11971 and Japanese Patent Laid-Open No. Sho 71-11971.
Various side guides (collars) have been proposed as measures against meandering in 63-176435 and JP-A-1-110464. These are those with springs, those that can accommodate changes in plate width, those that are suitable for direction change, and the like.

However, there is a limit to the meandering prevention by the side guides alone, and when the meandering amount is large, the edge of the web is damaged, and further, the web surface is scratched by getting over the side guides. Web breaks also occur.

A method has also been proposed in which the meandering is corrected by tilting the diversion gas blowing box. For example, JP-B-61-2676, JP-A-62-157165, and JP-B-62-18566.
In No. 6, the arc-shaped guide surface can be tilted, and the inside of the guide surface is divided so that the blowout pressure can be changed in the width direction. There is a method of controlling.

However, if the tilting method alone is used, it is 3-4.
In order to control fine meandering in the order of cm, it is necessary to tilt the direction-changing gas outlet box with high accuracy and at a high speed. To achieve this, a very high level of maintenance is always required. In addition, the web moves behind the tilt of the gas blowing box for direction change, which makes control very difficult. It becomes very expensive. As a result, the total maintenance load is increased, which is one of the causes of obstacles that increase the equipment mobility.

[0007]

SUMMARY OF THE INVENTION With respect to the above problems, it is an object of the present invention to provide a non-contact transfer device which is excellent in meandering control and has good transferability.

[0008]

SUMMARY OF THE INVENTION The above object of the present invention is to provide a contactless transporting device for supporting a continuously running web by jetting gas from a blow-out port, and a direction-changing gas blowing box can be tilted in the width direction of the web. And a side guide (collar) is provided on one side or both sides of the gas blowing box.

The present invention will be specifically described below.

In the present invention, the direction-changing gas blow-out box can be tilted to accommodate a large amount of meandering, and fine meandering can be controlled by the brim, so that stable carrying property can be obtained. Further, when the web width is constant, it is preferable that the brim is on both sides. When the width of the web is changed, it can be easily dealt with by providing only one side of the brim. By the tilting mechanism, the entire traveling position of the web can be moved to the direction of the collar on one side to some extent, and further, the collar can suppress the meandering with a quick cycle. Moreover,
If the meandering detection sensor is installed on the side guide side, it is possible to easily cope with different widths without changing the installation position and changing the setting of the meandering control system. Especially when the length of the non-contact part exceeds 40 m, many position sensors, collars,
A position correction mechanism is required, and by combining such a tilting mechanism and one side collar, it is possible to greatly reduce initial costs, running costs, and maintenance.

Further, the present apparatus may be used as a drying apparatus, and in that case as well, the transportability is good and the uniformity of drying is maintained.

The tilting device and the collar in the present invention are not particularly limited, and a known method can be used depending on the situation.

FIGS. 1A and 1B are explanatory views showing an example of a tilting device and a direction-changing gas blowing device in which a collar is mounted on both sides. FIG. 1A is a perspective view and FIG. 1B is a sectional view.

As described above, the collar may be attached to only one side.

In the figure, reference numeral 1 is a direction-changing gas outlet box body, and 2 is a brim. Reference numeral 3 is a hydraulic cylinder for tilting the gas blowing box. In the figure, the fulcrum 4 for tilting is provided in the central part of the blowing box 1 to tilt the blowing box.

For tilting, hydraulic cylinders may be provided on both sides. Further, the brim may be an upright plate, an inclined plate, or a spring structure, and can be selected according to the web. FIG. 2 is an explanatory diagram showing an example in which a collar is attached to only one side.

[0017]

EXAMPLES Hereinafter, the effects of the present invention will be specifically illustrated by examples.

Using a polyethylene terephthalate base having a thickness of 100 μm as a web, a 5% gelatin solution containing a surfactant was applied to a wet thickness of 100 μm, and a coating speed was 100 m.
It was applied, dried, and conveyed by a non-contact conveying device at a tension of 20 kg / min.

In this case, when the meandering control was not performed, the meandering was large and the conveyance was impossible on the way. Further, when only the tilting device is used, when only the brim is provided on both sides, and when the tilting device and the brim of the present invention shown in FIG. It strongly hits the brim and some scratches were generated on the edge. Further, even in the case of only the tilting device, the meandering tends to be hunting and the conveyance is unstable. On the other hand, when both of the present inventions were used together, the transportability was good and stable transport was possible.

[0020]

As described above, according to the present invention, it is possible to provide a non-contact transfer device which is excellent in meandering control and has good transferability.

[Brief description of drawings]

FIG. 1 is an explanatory view of a direction-changing gas blowing device that also uses a tilting device and a collar.

FIG. 2 is an explanatory view showing an example in which a brim is attached to one side.

[Explanation of symbols]

 1 Directional gas outlet box 2 Collar 3 Tilt hydraulic cylinder 4 Tilt fulcrum

Claims (1)

[Claims] 1. A non-contact conveying device for supporting a web that continuously runs by ejecting gas from a blow-out port, wherein a direction-changing gas blow-out box is tiltable in the width direction of the web, and the gas blow-out box. A non-contact transfer device, which is provided with a side guide (collar) on one side or both sides.