초록 ▼

A folding frame comprises four vertical legs and at least one shelf pivotally connected to each of the four vertical legs, each shelf being capable of folding vertically upward. The folding frame further comprises two support beams positioned beneath and on opposite ends of each shelf, each support

A folding frame comprises four vertical legs and at least one shelf pivotally connected to each of the four vertical legs, each shelf being capable of folding vertically upward. The folding frame further comprises two support beams positioned beneath and on opposite ends of each shelf, each support beam being pivotally connected to two of the four vertical legs and capable of folding horizontally inward. The folding frame is moveable between an extended position with each shelf being horizontal and supported by two of the support beams, and a collapsed position with each shelf being folded vertically upward and the support beams being folded horizontally inward.

대표청구항 ▼

What is claimed is: 1. A folding frame comprising: four vertical legs; at least one shelf pivotally connected to each of the four vertical legs, each shelf being capable of folding vertically upward; two support beams positioned beneath and on opposite ends of each shelf, each support beam being

What is claimed is: 1. A folding frame comprising: four vertical legs; at least one shelf pivotally connected to each of the four vertical legs, each shelf being capable of folding vertically upward; two support beams positioned beneath and on opposite ends of each shelf, each support beam being pivotally connected to two of the four vertical legs and capable of folding horizontally inward; and wherein the folding frame is moveable between an extended position with each shelf being horizontal and supported by two of the support beams, and a collapsed position with each shelf being folded vertically upward and the support beams being folded horizontally inward. 2. The folding frame according to claim 1 wherein if there is more than one shelf, further comprising a connecting device coupled to the shelves for folding the shelves together. 3. The folding frame according to claim 1 further comprising at least one cross plate and one cross beam mounted to the folding frame. 4. The folding frame according to claim 1 further comprising at least one position-limiting device to keep the support beams rigid when the folding frame is in the extended position. 5. The folding frame according to claim 1 wherein each shelf is pivotally connected to each of the four vertical legs via studs. 6. The folding frame according to claim 1 wherein each shelf has two panels connected by at least one hinge, each hinge enabling the shelf to fold vertically upward. 7. The folding frame according to claim 1 wherein each support beam is pivotally connected to two of the four vertical legs using hinges. 8. The folding frame according to claim 1 wherein each support beam has a center hinge enabling the support beam to fold horizontally inward. 9. The folding frame according to claim 1 further comprising a table surface capable of being positioned horizontally on top of the four legs. 10. The folding frame according to claim 1 further comprising a wheel attached to at least two of the four vertical legs. 11. The folding frame according to claim 1 wherein each shelf is rectangular in shape. 12. The folding frame according to claim 1 wherein each shelf is set to a desired width so as not to obstruct the folding frame when transitioning from the extended position to the collapsed position. 13. The folding frame according to claim 1 further comprising a locking device to secure the vertical legs together when the folding frame is in the collapsed position. 14. A folding frame comprising: four vertical legs; at least one rectangular shelf pivotally connected to each of the four vertical legs via studs, each shelf having two panels connected by at least one hinge, each hinge enabling the shelf to fold vertically upward; two support beams positioned beneath and on opposite ends of each shelf, each support beam being hinged to two of the four vertical legs, each support beam having a center hinge enabling the support beam to fold horizontally inward; wherein the folding frame is moveable between an extended position with each shelf being horizontal and supported by two of the support beams, and a collapsed position with each shelf being folded vertically upward and the support beams being folded horizontally inward; at least one cross plate and one cross beam mounted to the folding frame; and at least one position-limiting device to keep the support beams rigid when the folding frame is in the extended position. 15. The folding frame according to claim 14 wherein if there is more than one shelf, further comprising a connecting device coupled to the shelves for folding the shelves together. 16. The folding frame according to claim 14 further comprising a table surface capable of being positioned horizontally on top of the four legs. 17. The folding frame according to claim 14 further comprising a wheel attached to at least to two of the four vertical legs. 18. The folding frame according to claim 14 wherein each shelf is set to a desired width so as not to obstruct the folding frame when transitioning from the extended position to the collapsed position. 19. The folding frame according to claim 14 further comprising a locking device to secure the vertical legs together when the folding fame is in the collapsed position. 20. A folding frame comprising: first, second, third and fourth vertical legs; at least two shelves, with each shelf pivotally connected to each of the four vertical legs, and each shelf being capable of folding vertically upward; two support beams positioned beneath and on opposite ends of each shelf, each support beam being pivotally connected to two of the four vertical legs and capable of folding horizontally; first and second pivot arms each having first and second ends, with the first end of each pivot arm pivotally connected to the first and second legs, respectively; the second end of each pivot arm pivotally connected to a table surface; and wherein the folding frame is moveable between an extended position with each shelf being horizontal and supported by two of the support beams, and the table surface is supported in a horizontal position on top of the four vertical legs, and a collapsed position with each shelf being folded vertically upward and the support beams being folded horizontally, and the table surface is folded into a vertical position alongside the first and second legs by pivoting the pivot arms in an arc of more than 180 degrees. 21. The folding frame of claim 20 with the table surface supported only on the four vertical legs, when the folding frame is in the extended position. 22. The folding frame of claim 20 with the table surface supported vertically only by the pivot arms, when the folding frame is in the collapsed position. 23. The folding frame of claim 20 further comprising a cable connecting each of the shelves together, to assist in extending and collapsing the folding frame. 24. A folding table comprising: first, second, third and fourth legs; a first pivot arm having a first end and a second end, with the first end of the first pivot arm pivotally connected to the first leg; a second pivot arm having a first end and a second end, with the first end of the second pivot arm pivotally connected to the second leg; a table surface pivotally connected to the second end of the first pivot arm via a first pivot hinge, and the table surface pivotally connected to the second end of the second pivot arm at a second pivot hinge; at least two shelves, with each shelf including a first panel connected to a second panel by a hinge, with the first panel pivotally connected to the first and second legs, and with the second panel pivotally connected to the third and fourth legs; first and second support beams positioned beneath and adjacent to opposite ends of each shelf, with the first support beam pivotally connected to the first and fourth legs and with the second support beam connected to third and fourth legs, and with the first and second support beams foldable inwardly towards each other; and the first and second pivot arms moveable through an arc of more than 180 degrees, and the table surface connected only to the first and second pivot arms. 25. The folding frame of claim 24 comprising a plurality of shelves pivotally connected to each of the four vertical legs and capable of folding vertically upward, and further comprising a connecting device coupled to each of the shelves for folding the shelves together. 26. The folding frame of claim 24 further comprising at least one cross plate and one cross beam mounted to the folding frame. 27. The folding frame of claim 24 further comprising at least one position-limiting device to keep the support beams rigid when the folding frame is in the extended position. 28. The folding frame of claim 24 wherein each shelf is pivotally connected to each of the four vertical legs via studs. 29. The folding frame of claim 24 wherein each shelf has two panels connected by at least one hinge, each hinge enabling the shelf to fold vertically upward. 30. The folding frame of claim 24 wherein each support beam is pivotally connected to two of the four vertical legs using hinges. 31. The folding frame of claim 24 wherein each support beam has a center hinge enabling the support beam to fold horizontally inward. 32. The folding frame of claim 24 wherein each shelf is set to a desired width so as not to obstruct the folding frame when transitioning from the extended position to the collapsed position. 33. The folding frame of claim 24 further comprising a locking device to secure the vertical legs together when the folding frame is in the collapsed position. 34. The folding frame of claim 24 with the pivot arms moveable about three quarters of a turn about the first and second pivot hinges on the first and second pivot arms. 35. The folding frame of claim 24 with the table surface comprising a single slab. 36. A folding table comprising: first, second, third and fourth legs; a first pivot arm having a first end and a second end, with the first end of the first pivot arm pivotally connected to the first leg; a second pivot arm having a first end and a second end, with the first end of the second pivot arm pivotally connected to the second leg; a table surface pivotally connected to the second end of the first pivot arm via a first pivot hinge, and the table surface pivotally connected to the second end of the second pivot arm at a second pivot hinge; at least two shelves, with each shelf including a first panel connected to a second panel by a hinge, with the first panel pivotally connected to the first and second legs, and with the second panel pivotally connected to the third and fourth legs; and with the first and second pivot arms movable through more than 180 degrees of rotation, wherein the first and second pivot arms are parallel to the first and second legs, respectively, as the table is moved from a folded to an unfolded position. 37. The folding table of claim 36 further comprising first and second support beams positioned beneath and adjacent to opposite ends of each shelf, with the first support beam pivotally connected to the first and fourth legs and with the second support beam connected to third and fourth legs, and with the first and second support beams foldable inwardly towards each other. 38. The folding table of claim 36 with the table surface connected only to the first and second pivot arms.