High speed lineshaft-driven accumulating conveyor

Abstract

The rollers of a live roller conveyor are driven by drive wheels, which are driven from a driveshaft extending along the conveyor. When the drive wheels and their respective conveyor rollers are in contact with each other, the drive wheels cause the conveyor rollers to rotate. When the drive wheels and conveyor rollers are out of contact, the rollers are not driven and can accumulate product. Relative motion between the drive wheels and the conveyor rollers causes the drive to be engaged and disengaged. This is a Reissue of a Patent which was the subject of a Reexamination Certificate No. B1 5,375,696, dated Nov. 12, 1996, Request No. 90/003,811.

What is claimed is: 
     
       1. A conveyor, comprising: a conveyor frame .Iadd.defining elongated openings.Iaddend.;   at least one conveyor roller mounted .Iadd.in said elongated openings .Iaddend.on said conveyor frame .Iadd.and having an axis of rotation.Iaddend.;   a drive shaft extending along said conveyor frame;   at least one drive wheel rotatable about its axis and driven from said drive shaft.Iadd., the axis of said drive wheel being parallel to the axis of said conveyor roller at least when the drive wheel and roller are in driving engagement.Iaddend.;   wherein said conveyor roller and drive wheel are mounted for relative motion between them, such that, in a first position, said conveyor roller is driven from said drive wheel .Iadd.by contact with the outer surface of the conveyor roller.Iaddend., and, in a second position, said one conveyor roller is out of driving engagement with said drive wheel.Iadd.; and further comprising an actuator which automatically moves said roller downwardly relative to said elongated openings, into driving contact with said drive wheel, and moves said roller upwardly relative to said elongated openings, out of driving engagement with said drive wheel.Iaddend..   
     
     
       2. A conveyor . .as recited in claim 1.!., .Iadd.comprising: a conveyor frame;   at least one conveyor roller mounted on said conveyor frame and having an axis of rotation;   a drive shaft extending along said conveyor frame;   at least one drive wheel rotatable about its axis and driven from said drive shaft, the axis of said drive wheel being parallel to the axis of said conveyor roller .Iaddend..Badd.and coplanar with the axis of said drive shaft, .Baddend..Iadd.at least when .Iaddend.. .. .said.!..!. .Badd.the .Baddend..Iadd.drive .Iaddend.wheel . .. .is.!..!. .Badd.and roller are .Baddend..Iadd.in driving engagement. .. .with said conveyor roller.!..!.;   .Iadd.wherein said conveyor roller and drive wheel are mounted for relative motion between them, such that, in a first position, said conveyor roller is driven from said drive wheel by contact with the outer surface of the conveyor roller, and, in a second position, said conveyor roller is out of driving engagement with said drive wheel; and further comprising an actuator which automatically provides said relative motion between said conveyor roller and said drive wheel, .Iaddend.   wherein said drive wheel is movable relative to said conveyor frame, such that, when said drive wheel is moved to a first position, said drive wheel is in driving contact with said conveyor roller, and, when said drive wheel is moved to a second position, said drive wheel is out of driving contact with said conveyor roller. 3. A conveyor . .as recited in claim 1.!., .Iadd.comprising:   a conveyor frame, defining elongated openings;   at least one conveyor roller mounted in said elongated openings on said conveyor frame and having an axis of rotation;   a drive shaft extending along said conveyor frame;   at least one drive wheel rotatable about its axis and driven from said drive shaft; .Iaddend.   wherein said conveyor roller is movable relative to its drive wheel, such that, in a first position, said conveyor roller is driven by its drive wheel .Iadd.by contact with the outer surface of said conveyor roller.Iaddend., and, in a second position, .Iadd.in which said conveyor roller is shifted upwardly relative to said elongated openings and away from said drive wheel, .Iaddend.said conveyor roller is out of driving   
     
     
        engagement with its drive wheel. 4. A conveyor as recited in claim 1, wherein said drive wheel is driven whenever said drive shaft rotates, regardless of whether said drive wheel is in contact with its respective roller or out of contact with its respective roller. 5. A conveyor . .as recited in claim 1, and further.!., comprising: .Iadd.a conveyor frame;   at least one conveyor roller mounted on said conveyor frame;   a drive shaft extending along said conveyor frame;   at least one drive wheel rotatable about its axis and driven from said drive shaft;   wherein said conveyor roller and drive wheel are mounted for relative motion between them, such that, in a first position, said conveyor roller is driven from said drive wheel by contact with the outer surface of said conveyor roller, and, in a second position, said one conveyor roller is out of driving engagement with said drive wheel; .Iaddend..Badd.and further comprising: .Baddend.   a drive gear mounted on said drive shaft; and   a driven gear mounted so as to drive said drive wheel; said driven gear being continuously meshed with said drive gear, such that, when there is relative motion between said drive wheel and said one conveyor roller,   
     
     
        said drive gear and driven gear remain continuously meshed. 6. A conveyor as recited in claim 5, wherein said driven gear and said drive wheel are mounted for rotation about the same axis, such that, whenever said driven gear rotates, it causes said drive wheel to rotate. 7. A conveyor as recited in claim 5, wherein said drive wheel can be shifted into and out of driving engagement with said driven gear. . .8. A conveyor, comprising: a conveyor frame;   a drive shaft extending along said conveyor frame;   at least one conveyor roller mounted on said conveyor frame, with the axis of said conveyor roller substantially perpendicular to the axis of said drive shaft;   at least one drive wheel rotatable about an axis which is substantially perpendicular to the axis of the drive shaft, said drive wheel being driven from the drive shaft; and   means for causing relative motion between said drive wheel and said conveyor roller for engaging and disengaging said drive wheel from driving said conveyor roller..!.9. A conveyor . .as recited in claim 8, and further.!., comprising:   .Iadd.a conveyor frame;   a drive shaft extending along said conveyor frame;   at least one conveyor roller mounted on said conveyor frame, with the axis of said conveyor roller substantially perpendicular to the axis of said drive shaft;   at least one drive wheel rotatable about an axis which is substantially perpendicular to the axis of said drive shaft, said drive wheel being driven from the drive shaft;   means for causing relative motion between said drive wheel and said-conveyor roller for engaging and disengaging said drive wheel from driving said conveyor roller; .Iaddend.   a drive gear mounted on said drive shaft;   a drive wheel mounting frame on which said drive wheel is mounted; and   a driven gear mounted on said drive wheel mounting frame and continuously meshed with said drive gear, said drive wheel being driven from said driven gear. 10. A conveyor as recited in claim 9, wherein said drive wheel is mounted coaxially with said driven gear such that, when said driven gear rotates it causes said drive wheel to rotate. . .11. A conveyor as recited in claim 9, and further comprising a bracket mounted on said conveyor frame and movable relative to said conveyor frame, wherein movement of said bracket causes relative motion between said conveyor roller and said drive wheel for engaging and disengaging the drive between said drive wheel and said conveyor roller..!.. .12. A conveyor as recited in claim 9, wherein movement of said bracket causes said drive wheel to move relative to said conveyor roller..!.. .13. A conveyor as recited in claim 9, wherein movement of said bracket causes said conveyor roller to move relative to said drive wheel..!..Iadd.14. A conveyor as recited in claim 9, and further comprising a bracket mounted on said conveyor frame; said drive wheel mounting frame being mounted on said bracket; and said drive wheel mounting frame being movable relative to said conveyor frame, wherein movement of said drive wheel mounting frame causes relative motion between said conveyor roller and said drive wheel for engaging and disengaging the drive between said drive wheel and said conveyor roller. .Iaddend..Iadd.15. A conveyor as recited in claim 14, wherein movement of said drive wheel mounting frame causes said drive wheel to move relative to said conveyor roller. .Iaddend.