Patent ID: 7275635
Filing Date: 2007-10-02
Classification: B65G

Abstract:
1. A free flow conveyance system comprising: a plurality of linear conveyance apparatuses each having a plurality of unit conveyors linearly arranged, the conveyance length of each unit conveyor being substantially equal to the length of products along the conveyance direction, and each unit conveyor having a conveying-in side and a conveying-out side; and, so as to form an arbitrary conveyance route, at least one of a pivot conveyance apparatus having a unit conveyor which is arranged between the linear conveyance apparatuses being so arranged as to form a predetermined angle, and pivots the unit conveyor by a predetermined angle to selectively link the linear conveyance apparatuses by coupling the conveying-in side of the unit conveyor to the conveying-out side of a linear conveyance apparatus and by coupling the conveying-out side of the unit conveyor to the conveying-in side of a linear conveyance apparatus, an elevation conveyance apparatus having a unit conveyor which is arranged between the linear conveyance apparatuses being so arranged as to form a predetermined difference of elevation, and moves the unit conveyor upward and downward by a predetermined height to selectively link the linear conveyance apparatuses by coupling the conveying-in side of the unit conveyor to the conveying-out side of the unit conveyor to the conveying-out side of the unit conveyor to the conveying-in side of a linear conveyance apparatus, and a divergent conveyance apparatus having a unit conveyor which is arranged between a linear conveyance apparatus along the conveyance direction and parallel arranged at least two linear conveyance apparatuses along the conveyance which are of the same conveyance direction with a predetermined distance kept therebetween along the direction perpendicular to the conveyance direction, and selectively shifts the unit conveyor along the direction perpendicular to the conveyance direction to selectively couple the linear conveyance apparatus along the conveyance direction to one of the parallel arranged linear conveyance apparatuses along the conveyance direction, wherein product sensors are arranged at the conveying-in side as well as at the conveying-out side of the respective unit conveyors of the linear conveyance apparatuses, the pivot conveyance apparatus, the elevation conveyance apparatus, and the divergent conveyance apparatus, and; wherein the respective product sensors of the respective unit conveyors output two kinds of signals based on the sensing-product state and the not-sensing product state, and one of the signals is associated with a signal from product sensors of an adjacent unit conveyor outputting two kinds of signals based on the sensing-product state and the not-sensing product state, and one of the signals is associated with a signal from product sensors of an adjacent unit conveyor of the upstream side along the conveyance direction, while the other of the signals is associated with a signal from product sensors of an adjacent unit conveyor of the downstream side along the conveyance direction, and under the association of the signals, when a product is conveyed to a unit conveyor of the upstream side along the conveyance direction and product sensors of the unit conveyor are in the sensing-product state, in case respective product sensors of a unit conveyor of the downstream side along the conveyance direction are of the not-sensing product state, and when the product is conveyed to the unit conveyor of the downstream side along the conveyance direction and conveying-out side product sensors thereof become of the sensing-product state, the respective adjacent unit conveyors are driven or stopped.