초록 ▼

There is provided a workpiece conveyor including a workpiece conveying path which guides the conveyance of a workpiece; and a pair of air-blowing devices which are disposed on both sides of the workpiece conveying path and blow air uniformly to the workpiece on the workpiece conveying path from both

There is provided a workpiece conveyor including a workpiece conveying path which guides the conveyance of a workpiece; and a pair of air-blowing devices which are disposed on both sides of the workpiece conveying path and blow air uniformly to the workpiece on the workpiece conveying path from both sides to give propulsion to the workpiece for conveyance.

대표청구항 ▼

What is claimed is: 1. A workpiece conveyor comprising: a workpiece conveying path which guides the conveyance of a workpiece; and a pair of air-blowing devices which are disposed on both sides of the workpiece conveying path and blow air uniformly to the workpiece on the workpiece conveying path f

What is claimed is: 1. A workpiece conveyor comprising: a workpiece conveying path which guides the conveyance of a workpiece; and a pair of air-blowing devices which are disposed on both sides of the workpiece conveying path and blow air uniformly to the workpiece on the workpiece conveying path from both sides to give propulsion to the workpiece for conveyance; wherein the respective air-blowing devices further include a plurality of propulsion nozzles which blow air to the side surface of the workpiece from a direction oblique to the conveying direction and a plurality of control nozzles which blow air to the side surface of the workpiece from a direction orthogonal to the conveying direction to control the posture of the workpiece; and the plurality of propulsion nozzles and control nozzles are arranged side by side in the conveying direction in a mixed state. 2. The workpiece conveyor according to claim 1, wherein an interval between the plurality of propulsion nozzles of the respective air-blowing devices is shorter than one-half the length of the side surface of the workpiece. 3. The workpiece conveyor according to claim 1, wherein the pair of air-blowing devices have the respective propulsion nozzles and control nozzles arranged opposite to each other. 4. The workpiece conveyor according to claim 1, wherein an interval between the plurality of propulsion nozzles and the plurality of control nozzles of the respective air-blowing devices is shorter than one-half the length of the side surface of the workpiece. 5. The workpiece conveyor according to claim 1, wherein a width of the workpiece conveying path is formed narrower than that of the workpiece. 6. A workpiece conveyor comprising: a workpiece conveying path which guides the conveyance of a workpiece; and a pair of air-blowing devices which are disposed on both sides of the workpiece conveying path and blow air uniformly to the workpiece on the workpiece conveying path from both sides to give propulsion to the workpiece for conveyance; wherein the workpiece conveying path is composed of a pair of divided conveying paths on which a workpiece is straddlingly mounted; and includes a separation distance adjusting device which moves at least one of the pair of divided conveying paths to a direction orthogonal to the conveying direction for adjusting a separation distance between the pair of divided conveying paths. 7. The workpiece conveyor according to claim 6, wherein the pair of divided conveying paths extend parallel to each other in the conveying direction, and the separation distance adjusting device adjusts the separation distance between the pair of divided conveying paths while keeping their parallel state. 8. The workpiece conveyor according to claim 6, wherein the pair of divided conveying paths extend non-parallel to each other and taperingly in a truncated chevron shape in the conveying direction, and the separation distance adjusting device adjusts the separation distance between the pair of divided conveying paths while keeping their non-parallel state. 9. A workpiece conveyor comprising: a workpiece conveying path which guides the conveyance of a workpiece; a pair of air-blowing devices which are disposed on both sides of the workpiece conveying path and blow air uniformly to the workpiece on the workpiece conveying path from both sides to give propulsion to the workpiece for conveyance, the workpiece conveying path being composed of a plurality of actuating air plates successive in a conveying direction and formed of a perforated plate and an air chamber communicating with the perforated plate; an air supplying device which supplies air to the air chamber to float the workpiece through the perforated plate; a vacuum suction device which sucks air from the air chamber to suck the workpiece through the perforated plate; and a switch controlling device which switches between the air supplying device and the vacuum suction device. 10. The workpiece conveyor according to claim 9, wherein the perforated plate is a porous plate. 11. A method of conveying a workpiece comprising: blowing air uniformly to both side surfaces of a workpiece conveyed by a belt conveyor from both sides thereof with a pair of air blowing devices to convey the workpiece while controlling its posture in the plane surface; wherein the respective air-blowing devices further include a plurality of propulsion nozzles which blow air to the side surface of the workpiece from a direction oblique to the conveying direction and a plurality of control nozzles which blow air to the side surface of the workpiece from a direction orthogonal to the conveying direction to control the posture of the workpiece, and the plurality of propulsion nozzles and control nozzles are arranged side by side in the conveying direction in a mixed state. 12. A workpiece conveyor comprising: a belt conveyor in which a workpiece is mounted on a belt and conveyed; and a pair of air-blowing devices which are disposed on both sides of the belt conveyor and blow air to the workpiece conveyed by the belt from both sides; wherein the pair of air-blowing devices blow air uniformly to both side surfaces of the workpiece to control the posture thereof in the plane surface of the belt; the pair of air-blowing devices include a plurality of groups of blowing nozzles which are arranged at the same position orthogonal to the conveying direction to make a pair; and the respective blowing nozzles blow air in a direction substantially orthogonal to the conveying direction. 13. The workpiece conveyor according to claim 12, wherein an interval between the plurality of blowing nozzles of the respective air-blowing devices is shorter than one-half the length of the side surface of the workpiece. 14. The workpiece conveyor according to claim 12, wherein the plurality of blowing nozzles of the respective air-blowing devices are disposed at uniform intervals from a position near a conveyance starting position to a conveyance ending position of the belt conveyor. 15. The workpiece conveyor according to claim 12, wherein a width of the belt is formed narrower than that of the workpiece. 16. A workpiece conveyor comprising: a belt conveyor in which a workpiece is mounted on a belt and conveyed; and a pair of air-blowing devices which are disposed on both sides of the belt conveyor and blow air to the workpiece conveyed by the belt from both sides; wherein the pair of air-blowing devices blow air uniformly to both side surfaces of the workpiece to control the posture thereof in the plane surface of the belt; the pair of air-blowing devices include a plurality of groups of blowing nozzles which are arranged at the same position orthogonal to the conveying direction to make a pair; and the plurality of blowing nozzles of the respective air-blowing devices are disposed from a position near a conveyance starting position to a conveyance ending position of the belt conveyor in such a manner that the blowing nozzles are densely disposed as they get closer to the conveyance ending position. 17. A workpiece conveyor comprising: a belt conveyor in which a workpiece is mounted on a belt and conveyed; and a pair of air-blowing devices which are disposed on both sides of the belt conveyor and blow air to the workpiece conveyed by the belt from both sides; wherein the pair of air-blowing devices blow air uniformly to both side surfaces of the workpiece to control the posture thereof in the plane surface of the belt; the pair of air-blowing devices include a plurality of groups of blowing nozzles which are arranged at the same position orthogonal to the conveying direction to make a pair; the plurality of blowing nozzles of the respective air-blowing devices are disposed at uniform intervals from a position near a conveyance starting position to a conveyance ending position of the belt conveyor, and further comprising: an air controlling device which individually controls an amount of air blown from the plurality of blowing nozzles, wherein the air controlling device controls an amount of air blown from the respective air nozzles such that the workpiece receives an increased amount of air as it approaches the conveyance ending position. 18. A workpiece conveyor comprising: a belt conveyor in which a workpiece is mounted on a belt and conveyed; and a pair of air-blowing devices which are disposed on both sides of the belt conveyor and blow air to the workpiece conveyed by the belt from both sides; wherein the pair of air-blowing devices blow air uniformly to both side surfaces of the workpiece to control the posture thereof in the plane surface of the belt; the belt includes an actuating air plate formed of a perforated plate and an air chamber communicating with the perforated plate at least at a position on which the workpiece is mounted, and further comprises: an air supplying device which supplies air to the air chamber to float the workpiece through the perforated plate. 19. The workpiece conveyor according to claim 18, further comprising: a vacuum suction device which sucks air from the air chamber to suck the workpiece through the perforated plate; and a switch controlling device which switches between the air supplying device and the vacuum suction device. 20. The workpiece conveyor according to claim 18, wherein the perforated plate is a porous plate.