JP2881379B2 - Support leg folding device such as table - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support leg folding device for a table or the like which is used by being fixed to a desk, a couch, a table or the like (hereinafter simply referred to as a table or the like).

[0002]

2. Description of the Related Art The simplest conventional folding device for supporting legs such as a table is to pivotally mount the upper ends of the supporting legs to a mounting bracket fixed to the back surface of a table board or a seat plate. It is well known that the mounting bracket and the support leg are connected by an oblique beam forming link that bends only to one of them.

The above-mentioned known leg folding apparatus has a simple structure and can be manufactured at low cost. However, it is not only easy to rattle and has poor stability, but also it cannot be expected to stand up smoothly and fold. Especially when used on desks and tables,
When sitting near the support legs, the skewed link forming the bridge becomes obstructed by the skewed link, which not only has the drawback of hitting the leg and knee of the seated person, but also the buckling link is bent by the contact of the leg with the knee. However, the support legs are inadvertently folded, which is not practical.

[0004] In view of the above, various improvements have been made to improve the standing and folding workability and stability of the support leg. For example, as disclosed in Japanese Utility Model Publication No. Sho 62-500, the upper end of the support leg is turned inward on a U-shaped bracket fixed to one end of a rectangular tube fixed in the longitudinal direction of the back surface of the table substrate. It is pivotally attached so that it can move, and the middle part of the oblique support rod, one end of which is pivotally connected to the square pipe near the pivot position, and the other end of the operating rod, one end of which is pivotally connected to the support leg, can be bent freely. To form a bar forming link, a projecting shaft protruding from the operating rod is fitted into the recess of the oblique support rod, and a coil spring is stretched between the rods on the inner surface of the bar forming link. In addition, there has been devised one that improves the standing stability by maintaining the straightness of the beam forming link and ensures smooth folding workability by assisting refraction.

[0005]

However, in the improved supporting leg folding device, a coil spring is stretched between the rods on the inner surface of the beam forming link, and the standing stability is maintained by maintaining the beam forming link in a straight state. It is possible to improve the workability and to ensure smooth folding workability with the aid of refraction.However, if you sit near the support legs, the oblique cross-shaped link will be in the way, and the legs and knees of the seated person Not only is there a drawback that hits, but the beam forming link is bent by the contact of
There is a problem to be solved in that the disadvantage that the support legs are folded carelessly cannot be eliminated.

It is an object of the present invention to provide a compact and smooth lock that automatically locks the leg upright state without incurring inadvertent folding without using a bar forming link that becomes an obstacle when seated. An object of the present invention is to provide a supporting leg folding device such as a table which can reliably perform folding by a simple operation.

[0007]

SUMMARY OF THE INVENTION A supporting leg folding apparatus such as a table according to the present invention solves the above-mentioned problem, and comprises a mounting bracket 1 having guide side plates 4 suspended on both sides of a mounting board 3; On both sides of the base end of a leg fixing cylinder 7 for fixing the supporting leg 6, a leg fixing device 2 having side plates 8 integrally formed at intervals inscribed in the guide side plate 4 is pivotally connected to a center shaft 9 so as to be freely foldable. A shaft hole 11 is formed in the side plate 8 of the leg fixing device 2 at a position below a radial horizontal line 10 passing through the center axis 9 and at a predetermined radius from the center axis 9 in the standing state of the leg. On the other hand, the guide side plate 4 of the mounting bracket 1
The operating shaft 13 is made to penetrate the guide slit 12 which is opened in accordance with the locus of the shaft hole 11 at the time of folding, and both ends thereof are projected from the guide slit 12, and one end of the projected operating shaft 13 is operated. The intermediate position of the lever 14 is fixed and one end of the link 15 is fixed to the other end, and the distal end of the operating lever 14 and the distal end of the link 15 are
And a spring hook 18 integral with the mounting board 3 is provided at a position inside the connection position, and the spring hook 18 and the spring end fixed shaft 17 are connected to each other. A tension spring 19 is stretched on the guide side plate 4, and the operation shaft 13 is connected to the guide slit 1.
Spring end fixed shaft 17 when moving in the folding direction along 2
Is allowed to move.

[0008]

In the supporting leg folding apparatus such as a table constructed as described above, when the supporting leg 6 is folded, the tension spring 19 is maintained in a shortened state, and the supporting leg 6 is freely opened. When the support leg 6 is raised and the support leg 6 integrated with the leg fixing tool 2 is raised about the central axis 9, the operation shaft fixed to the leg fixing tool 2 is raised. 13 is guided by the guide slit 12 of the mounting bracket 1 and rotates about the central axis 9.

In this case, the operation lever 14 is fixed to an operation shaft 13 projecting from the guide slit 12 of the mounting bracket 1 at an intermediate portion thereof, and its tip end passes through a through hole 16 of the mounting bracket 1. The spring end fixed shaft 17 is connected to the spring end fixed shaft 17 and a spring hook 18 integral with the mounting board 3 by a tension spring 19, so that the spring end fixed shaft 17 pulls the tension spring 19. The support leg 6 moves within the through hole 16 to be allowed to stand.

When the operating shaft 13 passes through the horizontal line 10 passing through the central shaft 9, the restoring force acting on the tension spring 19 acts as a rotating force in the direction of erecting the support leg 6, and acts. Is locked in the standing state.

When the support leg 6 is folded, the operation shaft 13 is provided at the free end of the operation lever 14 with the guide slit 12.
When the pulling force of the pulling spring 19 is applied in order to move the supporting leg 6 in the folding direction, the restoring force of the pulling spring 19 acts when the operating shaft 13 passes through the horizontal line 10, and the supporting leg 6 is automatically and lightly folded.

[0012]

FIG. 1 is an exploded front view of a supporting leg folding apparatus such as a table according to an embodiment of the present invention, partially broken away, and FIG. 2 is a partially broken front view of the supporting leg standing upright. 3 is a front view in a state where the support legs are folded, and FIG. 4 is a side view in a case where a pair of support leg folding devices such as a table are operated in conjunction with each other.

The supporting leg folding apparatus for a table or the like according to the embodiment has a mounting bracket 1 fixed to the back surface of a table substrate T, and a leg fixing member rotatably connected to the mounting bracket 1 with a central axis 9. It comprises a tool 2, an operation lever 14, a link 15, a tension spring 19, an operation shaft 13, and a spring end fixed shaft 17 for controlling the standing and folding of the leg fixing device 2.

First, the mounting bracket 1 has a configuration in which guide side plates 4 are vertically provided on both sides of a mounting substrate 3, and a leg fixing device 2 is provided.
Are opposed to both sides of the base end portion of a square or round leg fixing cylinder 7 for fixing the support leg 6 at an interval inscribed in the guide side plate 4 and centered on a center shaft 9 supported by the shaft support hole 5. A side plate 8 having a shaft hole 11 formed at a position on a line of a predetermined radius (27 mm) below the horizontal line 10 of the center shaft 9 is integrally formed.

The guide side plate 4 of the mounting bracket 1 has a bearing hole 22 for coupling with the leg fixing member 3.
A guide slit 12 having a predetermined radius (27 mm) centered on the hole 22 and conforming to the trajectory of the shaft hole 11 when the leg fixing device 3 is folded, and a spring end fixed to the tip of the operation lever 14 A bent through hole 16 that allows movement of the shaft 17 within a certain range is formed, and a stopper 20 with which the base end thereof abuts when the leg fixture 2 is erected on the mounting board 3, A spring hook 18 is formed upright corresponding to the spring end fixed shaft 17.

Each of the components described above connects the mounting bracket 1 and the leg fixing device 2 so as to be rotatable about a central shaft 9, and has an operating shaft 13 provided in a shaft hole 11 and a guide slit 12.
And an intermediate position of an operation lever 14 having one end as an operation end is fixed to one of both ends thereof, and a link 1 is provided at the other end.
5 is fixed, and the other end of the link 15 and the other end of the operation lever 14 are connected by a spring end fixed shaft 17 penetrated through a through hole 16 formed in the guide side plate 4. It is assembled by stretching a tension spring 19 on a spring hook 17 and a spring hook 18.

By changing the attachment of the operation lever 14 and the link 15 to either the front side or the rear side in the drawing, a support leg folding device such as a table used for the left and right can be obtained. Yes, all the components can be used in common.

Then, on the left and right sides of the back surface of the table substrate T,
A table or the like having a foldable support leg 6 by fixing the support leg folding device such as a table symmetrically with respect to the longitudinal center line and fixing the support leg 6 to each leg fixing cylinder 7. Is completed.

As shown in FIG. 4, the left and right support leg folding devices such as a table having the above-described structure are fixed symmetrically so as to be folded in the same direction, and each folding device is operated. In some cases, the free ends of the operation lever 14 are connected to each other by the operation rod 21 so as to be linked with each other to simplify the folding operation.

The supporting leg folding apparatus such as a table having the above-described configuration may use various metal materials, for example, any of iron, stainless steel, aluminum, light alloy, etc., or the supporting leg 6 may be made of wood. .

[0020]

According to the above-described supporting leg folding apparatus such as a table of the present invention, when the supporting leg 6 is folded, the tension spring 19 is maintained in a shortened state, and the supporting leg 6 is folded. To prevent the unintentional opening of the legs, and a low-volume folded state without backlash can be ensured.

When the support leg 6 is to be erected, the support leg 6 is integrated with the leg fixture 2 about the center axis 9.
Is caused, the operation shaft 13 fixed to the leg fixing device 2
It is guided by the guide slit 12 of the mounting bracket 1 and smoothly rotates about the central axis 9.

In this case, the operation lever 14 is fixed to an operation shaft 13 protruding from the guide slit 12 of the mounting bracket 1 at an intermediate portion thereof, and its tip end passes through a through hole 16 of the mounting bracket 1. The spring end fixed shaft 17 is connected to the spring end fixed shaft 17 and the spring hook 18 integral with the mounting board 3 by a tension spring 19, so that the spring end fixed shaft 17 pulls the tension spring 19. It moves within the through-hole 16 to allow the support leg 6 to stand up, and the extension spring 19 is hidden between the guide side plates 4, so that it can be used by the operator when the user stands up or folds.
It can be operated safely without pinching clothes or the like.

When the operating shaft 13 passes through the horizontal line 10 passing through the center axis 9, the restoring force acting on the tension spring 19 acts in the direction in which the support leg 6 is erected, and
Is locked in the upright state, and a stable upright state can be maintained.

When the supporting leg 6 is folded, a force for pulling a tension spring 19 is applied to the free end of the operating lever 14 so that the supporting leg 6 falls down in the folding direction, and the operating shaft 13 moves to the horizontal line 10. , The restoring force of the tension spring 19 acts, and the support leg 6 is automatically and lightly folded.

The supporting leg folding apparatus such as a table according to the present invention has a small number of parts, can be formed compactly, and can be constituted by common parts for both the left and right sides. There are support legs 6
In the state in which the arm is raised, the beam forming link does not protrude obliquely as in the related art, so that the space under the table board T is widened, and the seated person may hit the knee or be inadvertently folded. Without being folded, stable use of a table or the like is achieved.

[Brief description of the drawings]

FIG. 1 is an exploded front view of a support leg folding device such as a table according to an embodiment of the present invention, partially broken away.

FIG. 2 is a partially broken front view of a state in which a support leg is erected.

FIG. 3 is a front view of a state in which a support leg is folded.

FIG. 4 is a side view in which a part of a pair of support leg folding devices such as a table is operated in an interlocked manner, with a part thereof omitted.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 mounting bracket 2 leg fixing device 3 mounting substrate 4 guide side plate 5 shaft support hole 6 support leg 7 leg fixing tube 8 side plate 9 center axis 10 horizontal line 11 shaft hole 12 guide slit 13 operation shaft 14 operation lever 15 link 16 through hole 17 Spring end fixed shaft 18 Spring hook 19 Tension spring 20 Stopper 21 Operating rod 22 Bearing hole

Claims (3)

(57) [Claims] 1. A mounting bracket 1 having guide side plates 4 suspended on both sides of a mounting substrate 3, and side plates at both sides of a base end portion of a leg fixing cylinder 7 for fixing a support leg 6 at an interval in which the guide side plates 4 are inscribed. And a leg fixing device 2 integrally formed with the leg fixing device 8 so as to be freely foldable about a central axis 9.
On the other hand, the shaft hole 11 is formed at a position below the horizontal line 10 in the radial direction passing through the central axis 9 and at a predetermined radius from the central axis 9 in the standing state of the leg, while the guide side plate 4 of the mounting bracket 1 is formed. The operating shaft 13 is made to penetrate the guide slit 12 opened in accordance with the locus of the shaft hole 11 at the time of folding, and both ends thereof are projected from the guide slit 12. Is a spring that fixes an intermediate position of the operation lever 14 and fixes one end of a link 15 to the other end, and passes a tip of the operation lever 14 and a tip of the link 15 through a through hole 16 formed in the guide side plate 4. A spring hook 18 integrated with the mounting board 3 is provided at a position inside the connection position by an end fixed shaft 17.
A tension spring 19 is stretched between the spring 8 and the spring end fixed shaft 17, and the through hole 16 of the guide side plate 4 is
Wherein the spring end fixed shaft 17 is allowed to move when it moves along the guide slit 12 in the folding direction. 2. The supporting leg folding device according to claim 1, wherein a stopper 20 is provided on the mounting board 3 so that a base end thereof is brought into contact when the leg fixture 2 is erected. 3. A support leg 6 for folding in the same direction is fixed to a pair of support leg folding devices such as a table according to claim 1, and each folding device is connected to one operation shaft 13 or operation lever. 14. A supporting leg folding device such as a table, wherein the supporting leg is interlocked with an operating rod 21 connected to the supporting lever 14.