Roll conveyer

Abstract

Rotary rollers 3 are provided at both the left and right ends of each support shaft 30, and are arranged side by side to compose a conveyance path (a). An air blowoff path 4 is arranged at the middle section of the conveyance path (a), and is installed over the entire length of the conveyance path (a). The upper surface of the air blowoff path 4 is formed to be a flat, porous surface 4a having breathing properties. Air is jetted out of the upper surface toward the lower surface of a flat object (b) traveling on the porous surface 4a. A thin air layer is created between them. Then, the center section of the flat object (b) is lifted without any contact. More specifically, since the center section of the flat object (b) can be maintained in a non-contact state by a thin air layer, conveyance can be made smooth, and damage such as friction scratches to the flat object (b) can be avoided in a conveyance process.

Description

technical field

[0001] The invention relates to a roller conveyor for conveying thin and fragile plate-shaped objects, such as liquid crystal display panels or plasma display panels. Background technique

[0002] Figure 11 (a) and (b) are conventional roller conveyors for conveying plate-like objects. This roller conveyor 100 is provided with frames 101 on both left and right sides. Spindle shafts 102 are erected between these racks 101 , and are arranged side by side at appropriate intervals in the conveying direction of the roller conveyor 100 . Rollers 106 are attached to both ends of each support shaft 102 and fixedly support the side edges of the plate, and rotate integrally with the support shaft 102 .

[0003] In addition, a center roller 103 having a diameter equal to that of the above-mentioned roller 106 is provided substantially in the center of each of the support shafts 102 , and is rotatable relative to the support shaft 102 . In addition, drive transmissio...

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