A support structure for table machine includes a top frame unit holding a table machine, and a folding mechanism movable between an extended position to support the top frame unit in horizontal and a received position to hold the top frame unit in vertical. The folding mechanism has two first legs a
A support structure for table machine includes a top frame unit holding a table machine, and a folding mechanism movable between an extended position to support the top frame unit in horizontal and a received position to hold the top frame unit in vertical. The folding mechanism has two first legs and two second legs and two first connecting members respectively pivoted to the top frame unit, and two second connecting members and two third connecting members pivotally coupled between the front legs and the first connecting members such that when the folding mechanism is moved toward the receiving position, the first, second and third connecting members are moved with the second legs toward the first legs smoothly.
대표청구항▼
What is claimed is: 1. A support structure for supporting a table machine above the floor, comprising: a top frame unit for the mounting of the table machine, said top frame unit having a first pivot point, a second pivot point and a third pivot point orderly arranged at each of left and right side
What is claimed is: 1. A support structure for supporting a table machine above the floor, comprising: a top frame unit for the mounting of the table machine, said top frame unit having a first pivot point, a second pivot point and a third pivot point orderly arranged at each of left and right sides thereof; and a. folding mechanism supporting said top frame unit and operable to be alternatively set between an extended position where said top frame unit is substantially kept in horizontal and a received position where said top frame unit is substantially kept in vertical, said folding mechanism comprising: a pair of first legs having a pair of first ends respectively pivoted to the first pivot points of said top frame unit, and a pair of second ends each having a bearing portion for supporting on the floor; a pair of second legs having a pair of first ends respectively pivoted to the second pivot points of said top frame unit, and a pair of second ends on each of which a wheel is rotatably mounted; a pair of first connecting members having a pair of first ends respectively pivoted to said third pivot points of said top frame unit, and a pair of second ends; a pair of second connecting members having a pair of first ends respectively pivoted to the second ends of said first connecting members, and a pair of second ends respectively pivoted to middle parts of said second legs; and a pair of third connecting members having a pair of first ends respectively pivoted to middle parts of said first connecting members, and a pair of second ends respectively pivoted to middle parts of said first legs; wherein when said folding mechanism is in said extended position, said first legs and said second legs are kept in a crossed manner; when said folding mechanism is moved from said extended position toward said received position, said first connecting members, said second connecting members and said third connecting members are moved with said second legs toward said first legs; when said folding mechanism is in said received position, said wheels are kept close to the bearing portions of said first legs. 2. The support structure as claimed in claim 1, wherein said top frame unit comprises two transverse rods arranged in parallel; 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 connecting members are respectively pivoted to said transverse rods at inner sides of said transverse rods; said second legs are respectively pivoted to said transverse rods at outer sides of said transverse rods; when said folding mechanism is in said extended position, said first connecting members are substantially kept in parallel to said second legs, and said second connecting members are substantially kept in parallel to said transverse rods. 3. The support structure as claimed in claim 1, wherein the second end of each of said first legs has a stop portion respectively outwardly curvedly extending from the respective bearing portion, the stop portions of said first legs being supported on the floor when said top frame unit is kept in vertical. 4. The support structure as claimed in claim 1, further comprising a locking mechanism, which locks said first legs to said second legs when said folding mechanism is in said received position. 5. The support structure as claimed in claim 1, further comprising a locking mechanism, said locking mechanism comprising a first hook portion adapted to hook said first legs and said second legs together when said folding mechanism is in said received position, and a second hook portion adapted to secure said first legs and said second legs in said crossed manner when said folding mechanism is in said extended position. 6. The support structure as claimed in claim 1, further comprising at least one stop member fixedly fastened to said first legs for stopping said first connecting members, said first connecting members being stopped at said at least one stop member and defining with said first legs a 90�� contained angle when said folding mechanism is in said extended position. 7. The support structure as claimed in claim 4, wherein said locking mechanism comprises a retaining member pivoted to one of said second legs, and a locating member fixedly provided at said top frame unit, said retaining member having a front hook portion, which is hooked on said locating member when said folding mechanism is in said received position. 8. The support structure as claimed in claim 7, wherein said locking mechanism further comprises a biasing member, which imparts a biasing force to said retaining member in a predetermined direction relative to the associating second leg to force said front hook portion into engagement with said locating member when said folding mechanism is moved from said extended position to said received position; said retaining member has a press portion at one side remote from said front hook portion for pressing by the user to disengage said front hook portion from said locating member. 9. The support structure as claimed in claim 5, wherein said locking mechanism comprises a first retaining member, a second retaining member, a first locating member, and a second locating member, said first retaining member and said second retaining member being spacedly pivoted to one of said second legs, said first retaining member having one end terminating in said first hook portion, said second retaining member having one end terminating in said second hook portion, said first locating member having two distal ends respectively affixed to said first connecting members, said second locating member having two distal ends respectively affixed to said first legs, said first hook portion being hooked on said first locating member when said folding mechanism is in said receiving position, said second hook portion being hooked on said second locating member when said folding mechanism is in said extended position. 10. The support structure as claimed in claim 9, wherein said locking mechanism further comprises a link and a biasing member, said link being coupled between said first retaining member and said second retaining member, said first retaining member having a press portion extended from one end thereof remote from said first hook portion, said biasing member imparting a biasing force to said first retaining member in a predetermined direction; said first hook portion being disengaged from said first locating member when said folding mechanism is in said received position and when an external force is applied to said press portion, said second hook portion being disengaged from said second locating member when said folding mechanism is in said extended position and when an external force is applied to said press portion.
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이 특허에 인용된 특허 (14)
Ferneau Richard H. (Washington Court House OH), Cart having extensible auxiliary wheels.
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