JP3582032B2 - Expandable folding legs - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement of an expandable and foldable leg used for a table base.
[0002]
[Prior art]
Conventionally, these legs have to be put into the lower surface of the pedestal at the time of expansion and folding, and the legs are pulled out or folded.
[0003]
[Problems to be solved by the invention]
For this reason, it was necessary to lift the table pedestal and expand and fold the legs at the same time, and in the case of a wide table pedestal, it was difficult to see the folded legs from the outside, so labor was required to expand and fold the legs. . SUMMARY OF THE INVENTION An object of the present invention is to provide a freely expandable and foldable leg (hereinafter, abbreviated as a universal leg) that can be used as a base of a table and can be expanded and folded without requiring labor.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a center rectangular sliding hole (3, 3) is formed at an outer end of a protruding plate (3, 3) projecting perpendicularly to a lower surface of a pedestal (40). (7, 7), the second hole (6, 6) in the proximity position and the first hole (5, 5) in the inner end portion are connected in parallel with the base portion (2) drilled in the opposite position. And a fourth hole (19, 19) at the upper end and a fifth hole (20, 20) at the lower end of the rectangular leg plate (14, 14) having a notch at the edge. Wheels (16, 16) are fixed to an axle (17) penetrating through the holes (20, 20) of No. 5, and hooks (18, 18) are protruded at positions facing the upper inside of the leg plates (14, 14). Legs (13),
A flat substrate (9) having a convex narrow portion (9a) on the inside, and a narrow portion (10a) at a lower end on the inner side opposite to the end of the outer surface of the substrate (9) and a hole on the upper portion. A first release link (8) having a crosspiece (10, 10) with a perforated (11, 11) and a rectangular first connected parallel and having an upper wide portion (22a, 22a) at the inner end. A first hole in which holes (25, 25) are drilled at the outer end of the link (22, 22) and holes (24, 24) are drilled above the inner end of the wide portion (22a, 22a). A link unit (21);
Eighth holes (30, 30) are drilled at the outer end of the rectangular second link (28, 28) which is connected in parallel and has a lower wide part (28a, 28a) at the inner end. A second link portion (27) in which a ninth hole (31, 31) is drilled at a position below the inner end of each of the second link portions (28a, 28a);
From one of the first hole (6), the second hole (11), and the third hole (19), the other of the second hole (6), the third hole (11), the fourth The release link (8) and the leg (13) are rotatable around the shaft (12) through the hole (19) through the shaft (12),
The slide shaft (26) is inserted from one of the slide hole (7) and the seventh hole (25) into the other one of the seventh hole (25) and the slide hole (7) to pass through the first link portion (21). ) Is rotatable around the shaft (26), and the slide shaft (26) is slidable along the slide holes (7, 7).
The shaft (33) penetrates the shaft (33) from one of the first hole (5) and the ninth hole (31) to the other of the first hole (5) and the ninth hole (31). A part (27) is rotatable around the shaft (33) as an axis;
The first link extends from one of the sixth hole (24) and the eighth hole (30) through the shaft (32) of the other of the sixth hole (24) and the eighth hole (30). A portion (21) and the second link portion (27) are rotatable around the shaft (32) as an axis;
A pair of elastic members (34, 34) are stretched between both ends of the slide shaft (26) and the shaft (33), so that the legs (13) can be expanded or folded by vertically moving the pedestal (40). The problem is solved by the expanding and folding legs.
According to the second aspect of the present invention, in the foldable foldable leg according to the first aspect, it is preferable that the elastic member is a foldable foldable leg in which the elastic material is a coil spring.
According to a third aspect of the present invention, in the foldable foldable leg according to any one of the first to second aspects, the first small hole is located at a position facing the lower side or the upper side of the fourth hole (19, 19). (36, 36) are drilled, and second small holes (37, 37) are drilled at positions opposing above or below the second hole (6, 6), and lines are formed at both ends in the direction opposite to the winding shaft. The first and second small holes (36, 36) are provided between the projecting plates (4, 4) and the leg plates (14, 14). 37), and the leg plates (14, 14) can be expanded and foldable legs in which the leg plates (14, 14) are urged in the leg lowering direction (Y).
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. The universal leg 1 of the present invention has the following configuration. One or two free legs 1 are provided corresponding to the state of the floor on which the table is placed, or two at an interval. The configuration of the two legs is different from that of the single leg only in the position and direction. There is a case where there is one horizontal floor GG. Outer end portions of the protruding plates 4 and 4 projecting from the lower surface of the table pedestal 40 vertically and parallel to the lower surface of the parallel plate 3 (left side in the longitudinal direction of the table pedestal 40 shown in FIGS. 1A and 1B). In the case where two free legs 1 are provided at an interval, the left and right sides of the free leg in the symmetrical position are on the inside and the right side is on the outside. A rectangular slide hole 7, 7 at the center, a circular second hole 6, 6 at a position close to the slide hole 7, and a circular first hole 5, 5 at the inner end are respectively formed at opposing positions. The base 2 is fixed. Here, without providing the parallel plate 3, the protruding plates 4, 4 may be fixed in parallel to the lower surface of the pedestal 40 with the L-shaped cross section.
Rectangular leg plates 14, 14 each having a notch at an edge are connected in parallel by a square connecting plate 15, and circular fourth holes 19, 19 are formed at upper ends of the leg plates 14, 14. A fifth circular hole 20 is formed in the axle 17 and has a surface at an inner position of the leg plates 14 of the axle 17 having pins and rings at both ends thereof. Circular wheels 16, 16 protruding from the lower ends of the leg plates 14, 14 are fixed, and can be rotated around an axle 17. Hooks 18, 18 are protruded from upper ends of the leg plates 14, 14 to oppose each other. The unit 13 is configured.
[0006]
A flat plate-shaped substrate 9 having a convex narrow portion 9a on the inside, a circular third hole 11 having a narrow portion 10a, 10a at an inner lower end at a position facing a side outer end of the substrate 9, and a circular upper hole 11; The release link 8 is constituted by the arms 10 and 10 in which 11 is drilled.
The rectangular first links 22, 22 having upper wide portions 22 a, 22 a at the inner ends are connected in parallel by a square connecting plate 23, and the first links 22, 22 have circular seventh links at the outer ends. Holes 25, 25 are drilled, and circular sixth holes 24, 24 are drilled above the inner ends of the wide portions 22a, 22a to form a first link portion 21.
Rectangular second links 28, 28 having lower wide portions 28a, 28a at the inner ends are connected in parallel by a square connecting plate 29, and the second links 28, 28 have a circular eighth link at the outer ends. Holes 30, 30 are drilled, and ninth circular holes 31, 31 are drilled below the inner ends of the wide portions 28a, 28a to form a second link portion 27.
The free leg 1 is provided with a pair of coil springs 34, 34, which are elastic members, and shafts 12, 32, 33, and slide shafts 26 each having a circular cross section and having a stopper such as a pin or a ring at both ends. Further, it is preferable to provide stoppers 39, 39 which can be adjusted in and out of the mounting plate 38 fixed to the side surfaces of the outer end portions of the parallel plates 4, 4 by screw portions.
[0007]
The connection relationship between the above components will be described.
One of the second hole 6 of the base portion 2, the fourth hole 19 of the leg portion 13, and the third hole 11 of the release link portion 8 fixed to the lower surface of the table base 40, and the other second hole 6, through the third hole 11, the fourth hole 19, and through the shaft 12 slightly wider than the outer distance between the protruding plates 4, 4, the release link 8 and the leg 13 are turned around the shaft 12 as the axis. It is possible to move.
From one of the slide hole 7 of the base portion 2 and the seventh hole 25 of the first link 22, a slide shaft 26 wider than the shaft 12 is passed through the other seventh hole 25 and the slide hole 7, and the outer link portion is formed. 21 is rotatable about a shaft 26 as an axis, and the slide shaft 26 is slidable between the outside and the inside along the slide holes 7, 7 so that the first link portion 21 is movable in accordance therewith.
A shaft 33 having substantially the same width as the slide shaft 26 from one of the first hole 5 of the base portion 2 and the ninth hole 31 of the second link 28 through the other ninth hole 31 and the first hole 5. , The second link portion 27 is rotatable around the shaft 33 as an axis.
From one of the eighth hole 30 of the second link 28 and the sixth hole 24 of the first link 21, through the other sixth hole 24, the eighth hole 30, the outer space of the second link 28, 28 is slightly smaller. The first link portion 21 and the second link portion 27 are rotatable around the shaft 32 as an axis.
A pair of springs 34, 34 are stretched between the ends of the slide shaft 26 and the shaft 33 in a tensioned state. The springs 34, 34 have a reaction force weaker than the force applied to the slide shaft 26 via the leg 13 due to the weight of the pedestal 40 and the adjustable leg 1, that is, if the pedestal 40 does not rise due to the spring reaction force. good.
[0008]
Next, the operation of the free leg 1 will be described sequentially.
When the adjustable leg 1 is folded, as shown in FIG. 3, the release link portion 8, the leg portion 13, the first link portion 21, and the second link portion 27 form a parallel plate of the base portion 2 fixed to the lower surface of the base 40. 3, the wheels 16 are in contact with the floor surface GG and are held at the minimum leg folding height h from the lower surface of the pedestal 40.
In order to move the adjustable leg 1 from the folded state to the expanded state, as shown in FIGS. 3 and 2 to 1, when the pedestal 40 is lifted in the ascending direction U from the folded state in FIG. As a result, the wheel 16 rotates in the clockwise lowering direction Y with the shaft 12 as a support shaft, and the wheels 16 and 16 descend. When the rotation of the leg 13 in the leg lowering direction Y progresses, the hooks 18, 18 protruding from the leg plates 14, 14 abut on the narrow portions 10 a, 10 a of the release link portion 8, and the substrate 9 moves on the shaft 12. Is rotated in the leg lowering direction Y with the shaft as a support shaft, and the convex narrow portion 9a of the substrate 9 abuts on the shaft 32 connecting the first link portions 21, 21 and the second link portions 27, 27, and is pushed down. The slide shaft 26 moves outward along the slide holes 7, 7 against the tension of the springs 34, 34 between the slide shaft 26 and the shaft 33, and the lowermost ends of the wheels 16, 16 are in contact with the floor surface GG and the pedestal. The lower leg 40 is maintained at the maximum leg spread height H. In this case, the reaction force of the springs 34, 34 acts on the outside of the leg plates 14, 14 through the slide shaft 26, but the weight of the pedestal 40 holds the universal leg 1 in the expanded state. The limit of the lower position of the leg plates 14, 14 can be adjusted by the access of the stoppers 39, 39.
[0009]
In order to move the adjustable leg 1 from the expanded state to the folded state, as shown in FIGS. 1, 2 and 3, when the pedestal 40 is lifted in the ascending direction U from the expanded state of FIG. As a result, the slide shaft 26, which is in contact with the outside of the leg plates 14, 14, is moved inward along the slide holes 7, 7 by pulling the springs 34, 34 between the slide shaft 26 and the shaft 33, and the leg plates 14, 14 The wheel 16 is rotated in the counterclockwise direction X in which the leg 12 is rotated counterclockwise with the shaft 12 as a support shaft. When the lowermost ends of the wheels 16, 16 reach the same level as the lowermost ends of the first link portions 21, 21, the first link portions 21, 21 come into contact with the floor surface GG, and the leg rising direction X in the counterclockwise direction. The second link portions 27 and 27 connected by the shaft 32 also start rotating around the shaft 33 as the first link portions 21 and 21 rotate with the rotation of the first link portions 21 and 21 to the folded state shown in FIG. It can be easily reached without any effort.
[0010]
Another embodiment of the present invention will be described with reference to FIG.
The same components as those in the embodiment described with reference to FIGS. 1 to 4 are denoted by the same reference numerals, and a part thereof is omitted.
Circular first small holes 36, 36 are drilled at positions opposing below the fourth holes 19, 19 drilled at the upper ends of the leg plates 14, 14 of the leg 13, and the projecting plate 4 of the base 2 is formed. Circular second small holes 37, 37 are formed in the upper and adjacent opposing positions of the second holes 6, 6 formed in 4, and the two ends of the coil spring have linear portions in the winding shaft opposing direction. The leg springs 35, 35 are provided, and the linear portions of the leg springs 35, 35 are inserted into the second small holes 37, 37 and the first small holes 36, 36 at intermediate positions between the protruding plates 4, 4 and the leg plates 14, 14. By press-fitting, the leg plates 14 are urged in the leg lowering direction Y with respect to the protruding plates 4. Here, the first small holes 36, 36 are provided at the upper and lower opposing positions of the fourth holes 19, 19, and the second small holes 37, 37 are provided at the lower adjacent opposing positions of the second holes 6, 6. It may be.
While the leg 13 in the above-described embodiment rotates in the clockwise leg lowering direction Y around the shaft 12 only by its own weight with the shaft 12 as a support shaft, in this other embodiment, the leg 13 The repulsive force of the leg springs 35 allows the wheels 16 to descend more smoothly.
Other operations of the universal leg 1 from the folded state to the expanded state and from the expanded state to the folded state are as described above, and description thereof will be omitted.
[0011]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to the free leg of this invention, it can be used for a pedestal of a table, and can expand and fold a leg easily by the up-and-down movement of a pedestal, without requiring labor.
[Brief description of the drawings]
1A is a plan view, FIG. 1B is a side view, and FIG. 1C is a front view showing an example of a free leg according to the present invention when it is expanded.
FIG. 2 is a side view showing an intermediate time between the time when the free leg of FIG. 1 is expanded and the time when it is folded.
FIG. 3 is a side view showing a state where the adjustable leg of FIG. 1 is folded.
FIG. 4 is an exploded schematic view schematically showing main components of the adjustable leg of FIG. 1;
FIG. 5 is a plan view of another example of the free leg of the present invention.
FIG. 6 is a schematic view schematically showing a part of components of FIG. 5 in an exploded manner.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Free leg 2 Base part 3 Parallel plate 4 Projection plate 5 First hole 6 Second hole 7 Slide hole 8 Release link part 9 Substrate 9a Convex narrow part 10 Arm 10a Narrow part 11 Third hole 12, 32, 33 Shaft 13 Leg portion 14 Leg plate 15, 23, 29 Connecting plate 16 Wheel 17 Axle 18 Hook 19 Fourth hole 20 Fifth hole 21 First link portion 22 First link 22a, 28a Wide portion 24 Sixth Hole 25 Seventh hole 26 Slide shaft 27 Second link portion 28 Second link 30 Eighth hole 31 Ninth hole 34 Spring 35 Leg spring 36 First small hole 37 Second small hole 38 Mounting plate 39 Stopper 40 Pedestal GG Floor surface H Leg spread height h Leg folding height U Pedestal rising direction D Pedestal descending direction X Leg rising direction Y Leg descending direction

Claims (3)

A central rectangular slide hole (7, 7) is formed at the outer end of the protruding plate (3, 3) vertically and parallel to the lower surface of the pedestal (40), and a second hole (6, 6) is provided at a position close to the slide hole. ) And first holes (5, 5) at the inner ends are respectively formed in opposing positions, and a rectangular leg plate (14, 14) which is connected in parallel and has a notch at the edge. ), A fourth hole (19, 19) is formed at the upper end and a fifth hole (20, 20) is formed at the lower end, and an axle (17) penetrating the fifth hole (20, 20) is formed. A leg (13) having wheels (16, 16) fixed thereto, and a hook (18, 18) protruding at an upper inside facing position of the leg plate (14, 14); ) And a narrow hole (10a) at the lower end on the inner side opposite to the end of the outer surface of the substrate (9), and a third hole (11, 1) on the upper side. ), And a first link (22, 22) having a release link (8) provided with a brace (10, 10) having a perforated hole and a wide link (22a, 22a) connected in parallel and having an upper wide portion (22a, 22a) at an inner end. A seventh hole (25, 25) is drilled at the outer end of 22), and a sixth hole (24, 24) is drilled above the inner end of the wide portion (22a, 22a). A first link unit (21);
Eighth holes (30, 30) are drilled at the outer end of the rectangular second link (28, 28) which is connected in parallel and has a lower wide part (28a, 28a) at the inner end. A second link portion (27) in which a ninth hole (31, 31) is drilled at a position below the inner end of each of the second link portions (28a, 28a);
From one of the second hole (6), the third hole (11) and the fourth hole (19), the other of the second hole (6), the third hole (11) and the fourth The release link (8) and the leg (13) are rotatable around the shaft (12) through the hole (19) through the shaft (12),
The slide shaft (26) is inserted from one of the slide hole (7) and the seventh hole (25) into the other one of the seventh hole (25) and the slide hole (7) to pass through the first link portion (21). ) Is rotatable around the shaft (26), and the slide shaft (26) is slidable along the slide holes (7, 7).
The shaft (33) penetrates the shaft (33) from one of the first hole (5) and the ninth hole (31) to the other of the first hole (5) and the ninth hole (31). A part (27) is rotatable around the shaft (33) as an axis;
The first link extends from one of the sixth hole (24) and the eighth hole (30) through the shaft (32) of the other of the sixth hole (24) and the eighth hole (30). A portion (21) and the second link portion (27) are rotatable around the shaft (32) as an axis;
A pair of elastic members (34, 34) are stretched between both ends of the slide shaft (26) and the shaft (33), so that the legs (13) can be expanded or folded by vertically moving the pedestal (40). Expandable and foldable legs, characterized in that 2. The expandable and foldable leg according to claim 1, wherein the elastic member is a coil spring. 3. The expandable and foldable leg according to claim 1, wherein a first small hole (36, 36) is formed at a position facing downward or above the fourth hole (19, 19). Leg springs (35, 35) having second small holes (37, 37) drilled at positions facing upward or downward from the second holes (6, 6), and having linear portions at both ends in the winding shaft facing direction. ) Is press-fitted into the first small holes (36, 36) and the second small holes (37, 37) at an intermediate position between the protruding plates (4, 4) and the leg plates (14, 14). , 14) are urged in a leg lowering direction (Y).

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