Sheet-material carrying device
View Patent ↗A downstream edge of a first guide plate has a convex shape in a carrying direction such that a width thereof gradually reduces from both lateral sides toward the center. A central portion of the downstream edge is formed with a protrusion, a width of which becomes narrower in the carrying direction. An upstream edge of a second guide plate has a concave shape in a reverse direction to the carrying direction so as to correspond to the shape of the downstream edge of the first guide plate. A central portion of the upstream edge is formed with a cutout, a width of which becomes narrower in the carrying direction. The downstream edge of the first guide plate is adjacent to the upstream edge of the second guide plate, and the protrusion is adjacent to the cutout so as to enter thereinto.
1. A sheet-material carrying device for carrying a sheet material in a carrying direction thereof, comprising:
a first guide member disposed along said carrying direction of said sheet material to guide said sheet material in said carrying direction, a downstream edge of said first guide member having a convex shape in said carrying direction such that a breadth thereof in a width direction perpendicular to said carrying direction gradually becomes narrower from both sides toward its center; and
a second guide member disposed along said carrying direction of said sheet material to guide said sheet material in said carrying direction, an upstream edge of said second guide member having a concave shape corresponding to the convex shape of the downstream edge of said first guide member,
wherein said first and second guide members are disposed so as to make said downstream edge and said upstream edge adjacent, and
wherein the center of one of said downstream and upstream edges is formed with a protrusion projecting toward the other thereof, and the center of the other of said downstream and upstream edges is formed with a cutout having a size larger than said protrusion, said first and second guide members being adjacent so as to enter said protrusion into said cutout.
2. A sheet-material carrying device according to claim 1 , wherein a length of said protrusion in said width direction gradually becomes narrower, and a length of said cutout in said width direction gradually becomes wider so as to correspond to said protrusion.
3. A sheet-material carrying device according to claim 2 , wherein said protrusion is formed at said downstream edge of said first guide member and slopes downward toward said upstream edge of said second guide member, the top of said protrusion being positioned under said cutout.
4. A sheet-material carrying device according to claim 1 , wherein said protrusion and said cutout have a rectangular shape.
5. A sheet-material carrying device according to claim 4 , wherein said cutout is formed at said downstream edge of said first guide member and is formed between two projections projecting from said downstream edge toward said upstream edge of said second guide member.
6. A sheet-material carrying device according to claim 1 , wherein at least one of said first and second guide members has a curvature to curve said carrying direction of said sheet material in an arc shape.
7. A sheet-material carrying device according to claim 1 , further comprising:
a skew corrector for correcting a skew of said sheet material so as to make an anterior end of said sheet material parallel to said width direction, said skew corrector correcting the skew of said sheet material by adjusting an inclination of one of said first and second guide members in said width direction.
8. A sheet-material carrying device according to claim 1 , further comprising:
a carrying roller for carrying said sheet material, said carrying roller being manually rotatable in a reverse direction to said carrying direction.
9. The sheet material carrying device according to claim 1 , wherein a change in slope of an edge of the convex shape of the first guide member increases from an edge of the first guide member to a center point of the first guide member, in a direction perpendicular to the carrying direction, and
wherein a change in slope of an edge of the concave shape of the second guide member increases from an edge of the second guide member to a center point of the second guide member, in a direction perpendicular to the carrying direction.