JPS6033740B2 - Conveying device for flexible strips - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a belt-like object conveying device that supports and transports a belt-like object using air pressure in a non-contact manner.

Conventionally, known methods for conveying a strip-like object include a contact conveyance method using rolls and a non-contact conveyance method using air pressure. Compared to the former method, the latter method has the advantage of being less prone to scratches, static electricity, and other problems, but has the disadvantage that the blown air causes a large amount of vibration in the transported strip. be. Therefore, as one of the measures to prevent such vibrations of the belt-shaped object, for example, as described in Japanese Patent Publication No. 44-21192, the belt-shaped object is supported in a wavy manner without contact using the air pressure of an air chamber having a curved surface. A conveying method is known in which air blow holes and guide plates are provided on both sides of the air chamber to prevent vibration of the belt-like article.

However, this method requires a large airflow, the energy loss of the airflow is large, and the effect of preventing minute vibrations of the strip is not practically satisfactory.

SUMMARY OF THE INVENTION An object of the present invention is to provide a conveying apparatus which solves the various drawbacks of the above-mentioned conveying method of supporting and conveying a strip-like article without contact using pneumatic pressure.

The purpose is to provide a plurality of air blowing slits on the outer surface of the air chamber 5 in the direction of the inside of the belt-shaped object 4 to be conveyed, as will be explained in detail in representative examples in FIGS. 3 to 5 below. In the belt-shaped object conveying device, which has an air blowing device provided and uses the pressure of the air blown out from the slit to support and convey the belt-shaped object without contact, the outer surface of the air chamber relative to the belt-shaped object is A plurality of convex air blowing slits 2 are provided along the arcuate outer surface so as to protrude from the outer surface, and the plurality of convex air blowing slits 2 are formed in an arc shape with respect to the traveling direction of the strip. It is characterized by having an air blowing device in which at least a pair of baffle plates 3 are provided between the strips 4 so as to cooperate with the convex air blowing slits to form an air pocket when the belt-shaped object 4 is conveyed. This is effectively achieved by using a maneuverable strip conveying device.

In other words, when a belt-shaped object is supported and conveyed without contact by pneumatic pressure, an air trap formed by a convex slit and a baffle plate is provided on the outer surface of the air chamber, and by providing the air trap, the air flow is improved. Loss of kinetic energy of the air due to outflow can be prevented, and the floating amount of the strip (the distance between the strip and the air blowing nozzle for the same flow rate) can be increased.

Therefore, based on the outflow of unnecessary air flow, the vibration of the strip material is prevented, and moreover, the outflow energy of the harmful air flow is converted into an increase in float and is effectively used for contactless support and transportation of the strip material. It is possible to achieve the effect of contributing to. Next, the present invention will be specifically explained based on the drawings.

Conventionally, a slit extending toward the inside of the strip 4 to be conveyed is provided in an air chamber 5 as shown in FIG. 1, and such air chambers 5 are provided alternately facing each other as shown in FIG. The strip 4 is sent in a wavy manner from the air chamber 5 to the slit 2.
The belt-shaped object 4 was floated by the buoyancy of the air blown through the air chamber 5 and transported without contact.
The kinetic energy of the air flow flowing out from the air chamber 5 flows out around the air chamber 5 almost unexpended, and this kinetic energy causes the vibration of the conveyed strip 4. On the other hand, in the conveying method of FIG. 3 according to the present invention, air is blown out between the convex slit 2 and the convex slit, and the convex slit cooperates with the convex slit to obstruct the air flow between the convex slits. , a set of baffle plates 3 are provided to form an air pocket, and the strip-shaped object 4 is supported and conveyed in a non-contact manner by the air pressure of the air pocket formed by the baffle plates 3.
The air flow flowing out around the belt is roughly stabilized, and the kinetic energy of the blown air flow is largely used to float the belt-like object 4, reducing the vibration of the belt-like object 4 being conveyed. In the conveying device shown in FIG.
When the height of the baffle plate 3 is taken as the sideboard, the floating amount increases by approximately nine times compared to the case where the subordinate air chamber 5 and slits shown in FIG. 1 are used, and the conveyed strip 4 It was observed that the vibration was reduced by nearly 50%. Furthermore, as shown in Fig. 5, when two sets of baffle plates 3 are attached inside the one set of baffle plates 3 shown in Fig. 3, the buoyancy is approximately 10% less than in the case of one set of baffle plates. An increase was observed. Further, when a plurality of sets of baffle plates 3 are provided, by appropriately adjusting the distance between the baffle plates 3, it is possible to convey various kinds of strip-shaped objects. Furthermore, in FIGS. 3 and 5, the baffle plates 3 are provided at positions equidistant from both ends of the strip-shaped object 4, but the baffle plates may be placed at random positions. Further, the baffle plate 3 and the convex slit 2 can be provided at right angles or intersect with each other at an appropriate angle, and the height of the baffle plate may be the same as the height of the convex slit or substantially destroy the air pocket of the present invention. They may be as low as possible, but preferably they are of the same height. Further, in the present invention, since the air pocket is formed by the baffle plate 3 and the convex slit 2 to convey the belt-shaped object, the air blowing nozzle on the outside of the baffle plate may be sealed for conveyance.

[Brief explanation of the drawing]

1 is a perspective view showing an air blowing device according to the prior art; FIG. 2 is a layout diagram showing a state in which the air blowing devices of FIG. FIG. 3 is a perspective view of an air blowing device according to the present invention, which is provided with one set of baffle plates on both sides. FIG. 4 is a sectional view of the air blowing device shown in FIG. 3, and FIG. 5 is a perspective view of the air blowing device according to the present invention, in which three sets of baffle plates are provided. 2 is a convex slit, 3 is a baffle plate, 4 is a strip, 5 is an air chamber, and 6 is a pipe that sends air to the air chamber 5. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. It has an air blowing device in which a plurality of air blowing slits 1 are provided on the outer surface of the air chamber 5 in the width direction of the belt-shaped object 4 to be conveyed, and the air blowing device uses the pressure of the air blown out from the slits to In a belt-like object conveying device that supports and transports a belt-like object without contact, the outer surface of the air chamber relative to the belt-like object is arc-shaped with respect to the traveling direction of the belt-like object, and the outer surface of the air chamber is arc-shaped with respect to the traveling direction of the belt-like object. A plurality of convex air blowing slits 2 are provided so as to protrude from the outer surface, and at least one pair of baffle plates 3 is provided between the plurality of convex air blowing slits 2 to prevent the convex air blowing slits 2 from being disposed between the convex air blowing slits 2 when the strip-shaped article 4 is conveyed. 1. A conveying device for a flexible strip, comprising an air blowing device configured to cooperate with a shaped air blowing slit to form an air pocket.