Levitation transport device

Abstract

In a levitation conveying device using a porous material for the guide member, damage to the joint between the main body member and the guide member, and a decrease in the levitation conveying function are suppressed. [Solution] A levitation conveying device for levitating and conveying a web conveyed object W comprises a main body member 1 made of a dense material and a guide member 2 made of a porous material. The main body member 1 has a first threaded portion 11 on its outer surface and a fluid introduction portion 12 for introducing a fluid for levitation conveying inside. The guide member 2 has a second threaded portion 21 on its inner surface and a levitation conveying surface 22 on its outer surface for levitating the web conveyed object. The main body member 1 and the guide member 2 are joined by a threaded joint 4 formed by the first threaded portion 11 and the second threaded portion 21.

Claims

1. A levitation conveying device that levitates and conveys web-borne materials, It comprises a main body made of a dense material and a guide member made of a porous material. The main body member has a first screw portion on its outer surface and a fluid introduction portion inside for introducing a fluid for levitation and transport. The guide member has a second threaded portion on its inner surface and a floating conveying surface on its outer surface that lifts the web conveyed material. The main body member and the guide member are joined by a screw connection between the first screw portion and the second screw portion. Furthermore, the main body member has a fluid supply section that supplies the fluid from the fluid introduction section to the screw joint section formed by the screw connection, A levitation conveying device in which the screw joint includes a gap, and the fluid is supplied to the guide member through the gap.

2. The levitation conveying device according to claim 1, wherein the first threaded portion is formed over the entire length in the longitudinal direction of the main body member, and the second threaded portion is formed over the entire length in the longitudinal direction of the guide member.

3. The levitation conveying device according to claim 1 or 2, wherein the fluid introduction section includes a fluid passage extending along the longitudinal central axis of the main body member, and the fluid supply section is formed to communicate the fluid passage and the screw joint.

4. The levitation conveying device according to claim 3, wherein the fluid supply section includes a communication hole that connects the fluid passage and the first screw portion, and a groove that communicates with the communication hole and is formed along the longitudinal direction of the first screw portion.

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