초록 ▼

A folding support settable between an extended position and a received position is disclosed to include a rack for holding thereon a table machine, a pair of first legs and a pair of second legs respectively pivoted to the rack for supporting the rack above the floor, two first links respectively pi

A folding support settable between an extended position and a received position is disclosed to include a rack for holding thereon a table machine, a pair of first legs and a pair of second legs respectively pivoted to the rack for supporting the rack above the floor, two first links respectively pivoted to the rack, and two second links respectively pivoted to the second legs and the first links. The first links and the second links are moved with the second legs toward the first legs when receiving the folding support, and at the same time the first links are stopped against the first legs, assuring safety of the receiving action.

대표청구항 ▼

What is claimed is: 1. A folding support for supporting thereon a table machine, the folding support being alternatively settable between an extended position and a received position, the folding support comprising: a rack for the mounting of the table machine, said rack having a first pivot point,

What is claimed is: 1. A folding support for supporting thereon a table machine, the folding support being alternatively settable between an extended position and a received position, the folding support comprising: a rack for the mounting of the table machine, said rack having a first pivot point, a second pivot point and a third pivot point orderly arranged at each of left and right sides thereof; a pair of first legs each having a first end respectively pivoted to one of the first pivot points of said rack, and a second end with a bearing portion for supporting on the floor; a pair of second legs each having a first end pivoted to one of the second pivot points of said rack, and a second end pivotally mounted with a wheel; a pair of first links each having a first end pivoted to one of said third pivot points of said rack, and a second end stopped against one of said first legs; and a pair of second links each having a first end pivoted to one of said first links close to the second end of said first link, and a second end pivoted to one of said second legs; wherein when said folding support is in said extended position, said first legs and said second legs are kept in a crossed manner to hold said rack in horizontal substantially; when said folding support is moved from said extended position toward said received position, said first links and said second links are moved with said second legs toward said first legs; when said folding support is in said received position, said wheels are kept close to the bearing portions of said first legs and said rack is kept in vertical substantially. 2. The folding support as claimed in claim 1, further comprising two connecting members each having a first end pivotally connected to a middle part of one of said first links by a first pin, and a second end pivotally connected to a middle part of one of said first legs by a second pin, said connecting members each having an elongated sliding slot for the passing of one of said first pins. 3. The folding support as claimed in claim 1, wherein said first links each comprise a bar member and a sliding cap, said bar members having first ends thereof respectively pivoted to the third pivot points of said rack, and second ends thereof respectively coupled to said sliding caps, said sliding cap having a contact surface disposed in contact with the associating first leg, said contact surface constituting the second end of the respective first link. 4. The folding support as claimed in claim 1, further comprising at least one stop member fixedly mounted on one of said first legs for stopping one of said first links to have each of said first links define with the associating first leg a 90° contained angle when the folding support is in said extended position. 5. The folding support as claimed in claim 1, wherein said rack comprises two transverse rods arranged in parallel for supporting thereon said table machine; one of said first pivot points, one of said second pivot points and one of said third pivot points are formed on one of said two transverse rods; said first legs and said first links are respectively pivoted to said transverse rods at an outer side of said transverse rods; said second legs are respectively pivoted to said transverse rods at an inner side of said transverse rods relative to said first legs and said first links. 6. The folding support as claimed in claim 5, wherein when said folding support is in said extended position, said first links are substantially kept in parallel to said second legs, and said second links are substantially kept in parallel to said transverse rods. 7. The folding support as claimed in claim 1, further comprising a lock having a first hook portion for holding said first legs and said second legs together when the folding support is in said received position. 8. The folding support as claimed in claim 7, wherein said lock comprises a retaining member, a bridge member and a locating member, said bridge member being connected between said two second legs, said locating member being connected between said two first links, said retaining member being pivoted to said bridge member and having a front end terminating into said first hook portion for hooking on said locating member when the folding support is in said received position. 9. The folding support as claimed in claim 7, wherein said lock further has a second hook portion for holding said first legs and said second legs in a crossed manner when the folding support is in said extended position. 10. The folding support as claimed in claim 9, wherein said lock comprises a first retaining member, a second retaining member, a first bridge member, and a second bridge member, said first retaining member and said second retaining member being pivotally mounted on one of said second legs, said first retaining member and said second retaining member each having a front end respectively terminating in said first hook portion and said hook portion, said first bridge member having two distal ends respectively affixed to said first links, said second bridge member having two distal ends respectively affixed to said two first legs, said first hook portion hooking said first bridge member when the folding support is in said received position, said second hook portion hooking said second bridge member when the folding support is in said extended position. 11. The folding support as claimed in claim 10, wherein said lock further comprises a link member and a spring member, said link member being coupled between said first retaining member and said second retaining member, said first retaining member having a press portion extending from one end thereof remote from said first hook portion, said spring member imparting a biasing force to said first retaining member in a predetermined direction; when the folding support is in said received position and an external force is applied to said press portion, said first hook portion is disengaged from said first bridge member; when the folding support is in said extended position and an external force is applied to said press portion, said second hook portion is disengaged from said second locating member.