Processing apparatus and method of operation thereof
A manufacturing facility includes a storage facility and a production facility. Workpieces are located in the storage facility in temporary storage accommodations, and are moved between the storage facility and stations in the production facility by mobile carrier units. The temporary storage accommodations may be units having a generally circular lading envelope, and an hexagonal optimal packing density. The optimal packing density is such that supports for the accommodation units lies outside the lading envelope circle, but within the corner regions of the hexagons of the packing density pattern. The accommodation units have lifting fittings that are accessible from the corners of the hexagons, whether the same as those of the supports, or different ones. The mobile carrier units may be automated guided vehicles The guided vehicle may be electronically controlled to prick up and deliver workpieces from one location to another, and may include self-navigating software, and interactive communication with other guided vehicle to permit suitable routes to be chosen, or to permit obstacles to be avoided. The facility may include a vertical degree of freedom, or workpiece retrieval apparatus used for transferring workpieces between the storage accommodations and the automated guided vehicles, or to other locations. The workpiece retrieval apparatus may be mounted on a bridge, and may include a multi-element raising any lowering array that is biased to oppose torsional deflection of the lifting member.
1. A tire tote for supporting a green tire workpiece, said tire tote comprising:
a body having a lading envelope, the lading envelope having a circular periphery;
said tire-tote having a projected footprint, said circular periphery of said lading envelope lying within said projected footprint;
supports upon which said body may stand, said supports lying outside said circular periphery and within said footprint; and
said footprint having an optimal packing density pattern having hexagonal cells;
one of said cells being a hexagonal cylinder having a first, inscribed circular cylinder tangent therewith, said inscribed circular cylinder being at least large enough to encompass said circular periphery of said lading envelope, and
said supports occupying corner regions of said cell lying outside said inscribed circular cylinder; and
said tote having lifting fittings by which said body may be lifted from above, said lifting fittings being accessible from corner regions of said hexagonal cylinder.
2. The tire tote of claim 1 wherein said body has a non-circular periphery, the non-circular periphery has corner portions and arcuate portions between adjacent corner portions, and said supports are mounted to said corner portions.
3. The tire tote of claim 2 wherein said lifting fittings are mounted to said arcuate portions.
4. The tire tote of claim 2 wherein said non-circular periphery is substantially hexagonal.
5. The tire tote of claim 2 wherein said non-circular periphery is substantially a regular hexagon.
6. The tire tote of claim 1 wherein one of said lifting fittings and one of said supports are located together.
7. The tire tote of claim 1 wherein said tire tote includes a sloped workpiece engagement interface.
8. The tire tote of claim 7 wherein said tire slope engagement interface is a portion of a conical surface.
9. The tire tote of claim 1 wherein:
said body is a carrier member having a workpiece support interface;
said carrier member has a center, at least one peripheral nadir and at least one peripheral zenith;
said peripheral nadir lies a first distance from said center;
said peripheral zenith lies a second distance from said center;
said first distance is less than said second distance; and
a ratio of said second distance to said first distance is less than two thirds of the square root of three.
10. The tire tote of claim 9 further comprising upstanding legs mounted thereabout, each of said legs being located closer to one said peripheral zenith than to any said peripheral nadir.
11. The tire tote of claim 9 wherein said tire tote has lifting members mounted thereto, each said lifting member being located closer to one of said peripheral nadirs that to any one of said peripheral zeniths.
12. The tire tote of claim 9 further comprising:
upstanding legs mounted thereabout, each of said legs being located closer to one said peripheral zenith than to any said peripheral nadir;
said tire tote has lifting members mounted thereto; and
each said lifting member being located closer to one of said peripheral nadirs that to any one of said peripheral zeniths.
13. The tire tote of claim 9 wherein said interface includes an inclined slope.
14. The tire tote of claim 13 wherein said slope is part of a conical section.
15. The tire tote of claim 1 wherein:
said body is a sling member having a workpiece support interface upon which to place green tires;
said sling member having a workpiece envelope radius;
said supports upon which to stand said body being support legs mounted to said sling member;
said support legs being located outside said workpiece envelope radius; and
said lifting fittings being circumferentially offset from said support legs.