JPS63277163A - Curved air nozzle - Google Patents

Abstract

PURPOSE:To make a transferred strip body so as to accurately surround a cylindrical body through in a noncontact state by setting up a lot of slit holes, extending in the circumferential direction, on an outer circumferential surface of the cylindrical body opened with an air supply port at one end in axial uniformity, while installing each ring rib projectingly among these slit holes of the cylindrical body. CONSTITUTION:In this air nozzle, bore diameters D1, D2...Dn of air flow distributing ring ribs 6, 6 and so on projectingy installed among respective slit holes 4, 4 and so on of a cylindrical body 1 are constituted to be small in diameter successively in inverse proportion to each of setup positions L1, L2...Ln from the side end of an air supply port 2. Consequently, air quantity to be jetted out of each slit hole 4 is fed out of the air supply port 2 by expansion of a phased area with the bore difference between these air flow distributing ring ribs 6 and 6 installed in front and in the rear of the slit hole 4, distributing air uniformly, and it is discharged out of each slit hole 4. Accordingly, when a transferred strip body such as a film or the like is surrounded through the cylindrical body, this transfers trip body keeps a state of being floated by air pressure out of each slit hole 4, and it is moved as maintaining a noncontact state.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a curved air nozzle for non-contact transfer technology of a strip.

[Conventional technology]

As a means of transporting strips whose surfaces have been conventionally processed, such as films, while maintaining a non-contact state.

A large number of slit holes extending in the axial direction are formed on the circumferential surface of the cylindrical body with the air supply port open at one end, and air or heated gas is discharged from the slit holes, and the pressure of the discharged air causes the cylindrical body to open. A curved air nozzle is used that has a structure in which a film passing through the main body floats from the circumferential surface of the cylindrical main body.

(Problems to be Solved by the Invention) However, in the above-mentioned end-formed curved air nozzle, each slit hole extends in the axial direction of the cylindrical body, so the air ejection speed varies at the side opposite to the air supply hole side of the slit hole. In other words, the air pressure is different, and there are problems such as the film passing through the enclosure being tilted or coming into contact with the cylindrical body, and it is technically difficult to adjust this by adjusting the width of the slit holes or the interval between the slit holes. It was very much a national policy.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a spherical air nozzle that can reliably encircle and connect a belt-shaped object to be transported in a non-contact state.

[Means for solving problems]

The curved air nozzle according to the present invention has a cylindrical body with an air supply port opened at one end, and a large number of slit holes extending in the circumferential direction are arranged evenly in the axial direction on the outer peripheral surface of the cylindrical body, and each of the above-mentioned slits in the cylindrical body The gist is that annular ribs for airflow distribution are protruded between the holes, and the inner diameter of each rib is gradually decreased in inverse proportion to the installation position from the end on the air supply port side. It has an airflow distribution structure.

[Created for]

Therefore, when air is supplied from the air supply port, the air that has entered the cylindrical body is discharged from each slit hole in the radial direction, and air pressure is generated by the discharge flow rate.

At this time, what is the air flow rate discharged from each slit hole?

Airflow is controlled by annular ribs for airflow distribution protruding between each slit hole in the cylindrical body, and as it is kept constant, there is no pressure gradient, and the film that passes through the surroundings is reliably kept in a non-contact state. can be retained.

〔Example〕

An embodiment of a curved air nozzle according to the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a bottomed cylindrical main body having an appropriate outer diameter and length, which is supported in a substantially horizontally installed state, and has an air supply port 2 opened at one end. The outer peripheral surface 3 of the cylindrical main body 1 has a large number of slit holes 4, 4, extending in the circumferential direction.
・ are arranged evenly in the axial direction, and each slit hole 4
is formed by drilling in a range of 120 degrees on the outer circumferential surface 3. Further, annular ribs 6, 6 for airflow distribution are provided protrudingly between the slit holes 4, 4 in the cylindrical main body 1 to form an airflow distribution chamber 5. Each airflow distribution rib 6
The inner diameters Di, D2, . Further, reference numeral 7 designates a rectifying plate provided on the air supply port 2 side of the air flow distribution chamber 5, and is formed by having a large number of small holes 8, 8, . . . bored in the plate surface.

The curved air nozzle having the above configuration has an annular rib 6.6 for air flow distribution protruding between the slit holes 4, 4 of the cylindrical main body 1.
The inner diameters Di, D2, . . . , Dn of the air supply ports 2, .

The amount of air ejected from each slit hole 4 is
Air is supplied from the air supply port 2, distributed evenly, and discharged from each slit hole 4 by expanding the area in stages due to the difference in inner diameter of the annular ribs 6°6 for air flow distribution provided before and after the air flow. Therefore, as shown in FIG.
When passing through the surrounding area, the belt material a to be transported is maintained in a floating state by appropriate air pressure discharged from the slit hole 4, and is moved while maintaining a non-contact state.

In addition, the amount of air discharged from each slit hole 4, that is, the air pressure, is determined by the inner diameter Di of each annular rib 6,6 for low flow distribution,
It can be adjusted by D2...Dn, and the configuration is extremely simple.

〔Effect of the invention〕

As described above, the curved air nozzle of the present invention is.

A large number of slit holes extending in the circumferential direction are arranged in parallel in the axial direction,
This is due to the structure in which air is evenly supplied to each slit hole using airflow distribution technology.

Since the belt-shaped object to be transported can be reliably passed through the surrounding area in a non-contact state, the effects of implementing the present invention are extremely large.

[Brief explanation of drawings]

FIG. 1 is a front sectional view showing an embodiment of a curved air nozzle according to the present invention, FIG. 2 is a perspective view of the entirety, and FIG. 3 is an explanatory view showing an operating body. 1...Cylindrical body 2...Air supply port 4...
・Slit hole 5... Airflow distribution chamber 6... Airflow distribution rib

Claims (2)

[Claims] (1) A large number of slit holes extending in the circumferential direction are arranged evenly in the axial direction on the outer peripheral surface of the cylindrical body with an air supply port opened at one end, and air flows between each of the slit holes in the cylindrical body. A curved air nozzle characterized by having a protruding annular distribution rib. (2) The curved air nozzle according to claim 1, wherein the inner diameter of the airflow distribution rib becomes smaller in inverse proportion to the installation position from the end on the side of the air supply port.