Conveyor system and conveying method

1. A conveyor system, comprising:

a suction device including a plurality of suction units, each suction unit having an opening and configured to suction a fiat transport target article elongated in one direction by negative pressure through the opening;

a moving device configured to move the suction device, the moving device including a turning-over section configured to rotate the suction device about an axis in an approximately horizontal direction; and

a control device configured to control the suction device and the moving device,

wherein when the control device determines that a front side and back side of the transport target article needs to be turned over, the control device

controls the moving device and the suction device to suction the transport target article so that an approximate center of the opening of at least one suction unit among the plurality of suction units is located on a first imaginary line, and remaining suction unit is located on one end side in a longitudinal direction of the transport target article with respect to the first imaginary line, the first imaginary line being an imaginary line running through an approximate center between both ends in a longitudinal direction of an upper suiface of the transport target article and approximately parallel to a shorter direction of the upper suiface of the transport target article;

controls the turning-over section to be in a front-back reversing orientation in which:

the remaining suction unit is positioned above the first imaginary line along a gravity direction;

another end opposite to one end side of the transport target article in the longitudinal direction suctioned by the remaining suction waits is located below the first imaginary line along the gravity direction; and the transport target article is inclined with respect to the gravity direction, and

performs control so that suction of the transport target article by the suction units is released after the suction device is in the front-back reversing orientation,

wherein when the control device determines that a front side and back side of the transport target article needs to be turned over, the control device

detects, among the plurality of suction units, the suction unit to be located at a position where the approximate center of the opening is on the first imaginary line according to the transport target article.

2. The conveyor system according to claim 1 ,

wherein when one suction unit is detected, the control device locates the approximate center of the opening of the suction unit at a position running through an approximate center of an upper surface of the transport target article.

3. The conveyor system according to claim 1 ,

wherein when a plurality of suction units are detected, the control device positions an approximate center between the plurality of detected suction units on a second imaginary line, the second imaginary line being an imaginary line running through an approximate center between both ends in the shorter direction of the upper surface and approximately parallel to the longitudinal direction.

4. The conveyor system according to claim 2 , comprising:

a conveyor with a transporting surface;

wherein the control device is configured to control the moving device to move the transport target article to the transporting surface of the conveyor.

5. The conveyor system according to claim 3 , comprising:

a conveyor with a transporting surface;

wherein the control device is configured to control the moving device to move the transport target article to the transporting surface of the conveyor.

6. The conveyor system according to claim 4 ,

wherein the control device is configured to control the moving device so that the suction unit is located below the transport target article in the front-back reversing orientation.

7. The conveyor system according to claim 5 ,

wherein the control device is configured to control the moving device so that the suction unit is located below the transport target article in the front-back reversing orientation.

8. The conveyor system according to claim 6 ,

wherein when the control device determines that a front side and back side of the transport target article need not be turned over, the control device

detects a suction unit to be used among the plurality of suction units according to the transport target article; and

when one suction unit is detected, locates the approximate center of the opening of the suction unit at an approximate center of an upper surface of the transport target article.

9. The conveyor system according to claim 7 ,

wherein when the control device determines that a front side and back side of the transport target article need not be turned over, the control device

detects a suction unit to be used among the plurality of suction units according to the transport target article; and

when one suction unit is detected, locates the approximate center of the opening of the suction unit at an approximate center of an upper surface of the traausport target article.

10. The conveyor system according to claim 6 ,

wherein when it is determined that a front side and back side of the transport target article need not be turned over, the control device

detects a suction unit to be used among the plurality of suction units according to the transport target article, and

when a plurality of suction units are detected, locates an approximate center between the detected suction units at an approximate center of an upper surface of the transport target article.

11. The conveyor system according to claim 7 ,

wherein when it is determined that a front side and back side of the transport target article need not be turned over, the control device

detects a suction unit to be used among the plurality of suction units according to the transport target article, and

when a plurality of suction units are detected locates an approximate center between the detected suction units at an approximate center of an upper surface of the transport target article.

12. A conveying method, comprising:

arranging a position of a suction device with espect to a flat transport target article elongated in one direction at a position where an approximate center of an opening of at least one suction unit among a plurality of suctionunits of the suction device is located on a first imaginary line, and remaining suction unit is located on one end side in a longitudinal direction of the transport target article with respect to the first imaginary line, the first imaginary line being an imaginary line running through an approximate center between both ends in a longitudinal direction of an upper surface of the transport target article and approximately parallel to a shorter direction of the upper surface of the transport target article;

suctioning the transport target article by the suction unit; and

bringing the suction device into a front-back reversing orientation in which: the remaining suction units are positioned above the first imaginary line along a gravity direction;

another end opposite to one end side of the transport target article in the longitudinal direction suctioned by the remaining suction units is located below the first imaginary line along the gravity direction; and the transport target article is inclined with respect to the gravity direction, and

releasing suction of the transport target article by the suction unit after the suction device is in e front-back reversing orientation,

wherein when it is determined that a front side and back side of the transport target article needs to be turned over,

detecting, among the plurality of suction units. the suction unit to be located at a position where the approximate center of the opening is on the first imaginary line according to the transport target article.

13. The conveying method according to claim 12 , comprising:

when one suction unit is detected, locating the approximate center of the opening of the suction unit at a position running through an approximate center of an upper surface of the transport target article.

14. The conveying method according to claim 12 , comprising:

when a plurality of suction units are detected, positioning an approximate center between the plurality of detected suction units on a second imaginary line, the second imaginary line being an imaginary line running through an approximate center between both ends in the shorter direction of the upper surface and approximately parallel to the longitudinal direction.