JPH0810047A - Support leg folding device for table and the like - Google Patents

Abstract

PURPOSE:To provide a support leg folding device for a table and the like, which can lock a leg in a stand-up condition, and surely and smoothly performs its folding operation with a compact constitution and simple actions. CONSTITUTION:Both an installation bracket 1 which has guide side plates 4 vertically fitted at both sides of an installation base plate 3 and a leg fixing fixture 2 which integrally forms side plates 8 at both sides of the base end section of a leg fixing cylinder 7 fixing a support leg 6, are rotatably pivoted in such a way as to be freely folded. Under a leg stand-up condition, the intermediate position of an operating lever 14 and a link 15 are fixed at both ends of an operating shaft 13 penetrating through both the shaft hole 11 of the leg fixing fixture 2, which is bored in a place located at a specified radius from the center shaft 9 below a horizontal line 10 passing through the center shaft 9, and a guide slit 12 which is made coincident with the moving locus of the aforesaid shaft hole 11 at the time of folding. The tip end of the operating lever 14 and the tip end of the link 15 are connected with each other by a spring end fixing shaft 17 penetrating through the through hole 16 of each guide side plate 4, and a tension spring 19 is so constituted as to be stretched over a spring hook 18 formed in the installation base plate 3 and a spring end fixing shaft 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supporting leg folding device for a table or the like which is used by attaching and fixing it to a desk, a chaise lounge, a table or the like (hereinafter simply referred to as a table or the like).

[0002]

2. Description of the Related Art As a conventional supporting leg folding apparatus for a table or the like of this type, the simplest one is to pivotally attach the upper ends of the supporting legs to a mounting bracket fixed to the back surface of a table substrate or a seat plate. It is well known that the mounting bracket and the support leg are connected to each other by a slanting bar-shaped link that bends only one of them.

The above-mentioned known leg folding device has a simple structure and can be manufactured at low cost, but it is not easy to rattle and has poor stability, and smooth standing and folding work cannot be expected. Especially when used on a desk or table,
When sitting near the supporting legs, the slanted beam forming link interferes with the leg knee of the seated person, and the beam forming link is bent by hitting the leg forming knee to the beam forming link. However, the supporting legs were inadvertently folded, which was not practical.

From the above, various improvements have been made in order to improve the erection, folding workability and stability of the support legs. For example, as disclosed in Japanese Utility Model Publication No. 62-500, a U-shaped metal fitting fixed to one end of a rectangular tube fixed in the longitudinal direction of the back surface of a table substrate is used to rotate the upper ends of the supporting legs inward. In addition to being pivotally attached so that it can move, the middle portion of the oblique rod whose one end is pivotally attached to the rectangular pipe near the pivotal position and the other end of the operating rod whose one end is pivotally attached to the support leg can be bent. A bar forming link is pivotally attached to the rod so that the projecting shaft protruding from the operating rod fits into the recess of the oblique support rod, and a coil spring is stretched between the bars on the inner surface of the bar forming link. In order to improve the standing stability by maintaining the straight state of the beam forming link and to ensure the smooth folding workability by the aid of the refraction.

[0005]

However, in the supporting leg folding apparatus improved as described above, a coil spring is stretched between the rods on the inner surface of the bar forming link to maintain the upright stability by maintaining the straight state of the bar forming link. It is possible to improve the workability and to ensure smooth folding workability by substituting the refraction, but if you sit near the support leg, the slanted beam forming link will interfere and the leg knee of the seated person will be disturbed. Not only there is a drawback to hit, but the leg forming link is bent by hitting the leg knee to the cross forming link,
There is a problem to be solved in that the disadvantage that the support legs are inadvertently folded cannot be eliminated.

An object of the present invention is to compactly and smoothly prevent the inadvertent leg folding by automatically locking the leg standing state without using a beam forming link which obstructs when seated. An object of the present invention is to provide a supporting leg folding device for a table or the like that can be folded surely by a simple operation.

[0007]

SUMMARY OF THE INVENTION A support leg folding device for a table or the like according to the present invention is intended to solve the above-mentioned problems and includes a mounting bracket 1 in which guide side plates 4 are vertically provided on both sides of a mounting substrate 3. A leg fixing tool 2 in which side plates 8 are integrally formed at an interval inscribed in the guide side plate 4 on both sides of a base end portion of a leg fixing cylinder 7 for fixing the support leg 6 is pivotally attached by a central shaft 9 in a freely foldable manner. A shaft hole 11 is formed in the side plate 8 of the leg fixing tool 2 at a position of a predetermined radius from the center axis 9 below a horizontal horizontal line 10 passing through the center axis 9 in a standing state. On the other hand, on the guide side plate 4 of the mounting bracket 1,
The operation shaft 13 is penetrated through the guide slit 12 which is opened so as to coincide 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 operation 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 tip of the operating lever 14 and the tip of the link 15 are fixed to the guide side plate 4.
Are connected to each other by a spring end fixing shaft 17 that passes through a through hole 16 formed in the mounting hole 3. A spring hook 18 integral with the mounting substrate 3 is provided at a position inside the connecting position, and the spring hook 18 and the spring end fixing shaft 17 are provided. A tension spring 19 is stretched over the guide shaft 1 and the through hole 16 of the guide side plate 4 has the operation shaft 13 with 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 device 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 erected by raising the support leg 6 that is integrated with the leg fixing tool 2 about the central shaft 9, the operation shaft fixed to the leg fixing tool 2 is caused. The guide 13 is guided by the guide slit 12 of the mounting bracket 1 and rotates about the central shaft 9.

In this case, the operation lever 14 is fixed to the operation shaft 13 projecting from the guide slit 12 of the mounting bracket 1 at its intermediate portion, and its tip portion penetrates the through hole 16 of the mounting bracket 1. Is fixed to the spring end fixing shaft 17 and is connected by a tension spring 19 between the spring end fixing shaft 17 and a spring hook 18 integrated with the mounting substrate 3, the spring end fixing shaft 17 pulls the tension spring 19 while It moves in the through hole 16 and allows the support leg 6 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 turning force in the direction of erecting the supporting leg 6, and the supporting leg 6 Is locked upright.

When the support leg 6 is folded, the operating shaft 13 is attached to the guide slit 12 at the free end of the operating lever 14.
If a force for pulling the tension spring 19 is applied to move the tension spring 19 in the direction along, the supporting leg 6 falls down in the folding direction, and when the operating shaft 13 passes the horizontal line 10, the restoring force of the tension spring 19 acts and the supporting leg 6 acts. 6 will be automatically and lightly folded.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an exploded front view showing a supporting leg folding device for a table or the like according to an embodiment of the present invention with a part thereof cut away, and FIG. 2 is a partially broken front view showing a state in which the supporting legs are upright. 3 is a front view of a state in which the support legs are folded, and FIG. 4 is a side view when a pair of support leg folding devices such as a table are operated in an interlocking manner.

A support 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 unit rotatably coupled to the mounting bracket 1 by a central shaft 9. The tool 2 includes an operating lever 14, a link 15, a tension spring 19, an operating shaft 13, and a spring end fixing shaft 17 for controlling the standing and folding of the leg fixing device 2.

First, the mounting bracket 1 has a construction in which guide side plates 4 are vertically provided on both sides of a mounting substrate 3, and a leg fixing tool 2 is provided.
Are opposed to both sides of the base end of the 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 the central shaft 9 supported by the shaft supporting hole 5. The side plate 8 is integrally formed with a shaft hole 11 at a position below a horizontal line 10 of the central shaft 9 on a predetermined radius (27 mm) line.

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

In each of the above-described constituent members, the mounting bracket 1 and the leg fixing tool 2 are rotatably connected by the central shaft 9, and the operation shaft 13 is inserted into the shaft hole 11 and the guide slit 12.
Is fixed to the one end of one end of the operating lever 14 and the other end of the link 1 is fixed.
5 is fixed, and the other end of the link 15 and the other end of the operating lever 14 are connected by a spring end fixing shaft 17 penetrating a through hole 16 formed in the guide side plate 4, and the spring end fixing shaft It is assembled by tensioning a tension spring 19 on 17 and the spring hook 18.

By changing the attachment of the operating lever 14 and the link 15 to either the front side or the back side in the drawing, a supporting leg folding device such as a table for left and right can be used. Yes, each component can be used in common.

Then, to the left and right of the back surface of the table substrate T,
A support leg folding device such as a table is fixed symmetrically with the longitudinal center line interposed therebetween, and the support legs 6 are fixed to the respective leg fixing cylinders 7 so that the table including the support legs 6 that can be folded. Is completed.

Further, as shown in FIG. 4, the left and right supporting leg folding devices such as a table having the above-described structure are symmetrically fixed so as to be folded in the same direction, and each folding device is operated. In some cases, the folding operation may be simplified by connecting the free ends of the operating lever 14 with the shaft 13 so that they are interlocked with each other.

In the supporting leg folding device such as the table having the above-described structure, any of various metal materials such as iron, stainless steel, aluminum, and light alloy, or the supporting leg 6 may be made of wood. .

[0020]

According to the support leg folding apparatus for a table or the like of the present invention described above, when the support leg 6 is folded, the tension spring 19 is maintained in a shortened state, and the support leg 6 is held. It acts so as to prevent unintentional opening of the legs, and it is possible to secure a low-volume folded state without rattling.

When the support leg 6 is erected, the support leg 6 is integrated with the leg fixing tool 2 about the central axis 9.
Causes the operation shaft 13 fixed to the leg fixing device 2,
The mounting bracket 1 is guided by the guide slits 12 of the mounting bracket 1 to smoothly rotate about the central shaft 9.

In this case, the operating lever 14 is fixed to the operating shaft 13 projecting from the guide slit 12 of the mounting bracket 1 at its intermediate portion, and its tip portion penetrates the through hole 16 of the mounting bracket 1. Is fixed to the spring end fixing shaft 17 and is connected by a tension spring 19 between the spring end fixing shaft 17 and a spring hook 18 integrated with the mounting substrate 3, the spring end fixing shaft 17 pulls the tension spring 19 while The tension spring 19 is moved between the through holes 16 to allow the support leg 6 to stand up, and the tension spring 19 is hidden between the guide side plates 4.
It can be operated safely without pinching clothes.

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 in the direction of erecting the supporting leg 6 so that the supporting leg 6 is raised.
Is locked in the upright state, and a stable upright state can be maintained.

When the support leg 6 is folded, if a force pulling the tension spring 19 is applied to the free end portion of the operating lever 14, the support leg 6 is tilted in the folding direction and the operating shaft 13 is moved to the horizontal line 10. After passing through, the restoring force of the tension spring 19 acts and the supporting leg 6 is automatically and lightly folded.

The supporting leg folding device for a table or the like according to the present invention has a small number of parts and can be formed compactly. Moreover, since the left and right parts can be constructed by common parts, the manufacture and assembly are easy. With support legs 6
Since the crosspiece forming link does not project obliquely as in the conventional case, the space under the table substrate T becomes large and the seated person's knee hits, which may result in careless folding. A stable use of a table or the like is achieved without being folded.

[Brief description of drawings]

FIG. 1 is an exploded front view of a supporting leg folding device for a table or the like according to an embodiment of the present invention with a part thereof cut away.

FIG. 2 is a partially cutaway front view showing a state in which a support leg is erected.

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

FIG. 4 is a side view with a part omitted when a pair of supporting leg folding devices such as a table are operated in an interlocking manner.

[Explanation of symbols]

 1 Mounting Bracket 2 Leg Fixing Tool 3 Mounting Substrate 4 Guide Side Plate 5 Shaft Support Hole 6 Support Leg 7 Leg Fixing Cylinder 8 Side Plate 9 Center Axis 10 Horizontal Line 11 Axis Hole 12 Guide Slit 13 Operation Axis 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)

[Claims] 1. A mounting bracket 1 in which guide side plates 4 are vertically provided on both sides of a mounting base plate 3, and side plates at intervals inscribed in the guide side plates 4 on both sides of a base end portion of a leg fixing cylinder 7 for fixing a support leg 6. 8 is integrally formed with a leg fixing tool 2 and is pivotally attached to a center shaft 9 so as to be foldable, and a side plate 8 of the leg fixing tool 2 is provided.
A shaft hole 11 is formed at a position of a predetermined radius from the center axis 9 below the horizontal line 10 in the radial direction passing through the center axis 9 in the leg upright state, and on the guide side plate 4 of the mounting bracket 1. Is formed by penetrating the operation shaft 13 through the guide slit 12 which is opened in conformity with the locus of the shaft hole 11 at the time of folding, and projecting both ends thereof from the guide slit 12 to one end of the projecting operation shaft 13. Fixes an intermediate position of the operating lever 14 and one end of a link 15 to the other end, and a spring in which the tip of the operating lever 14 and the tip of the link 15 are passed through a through hole 16 formed in the guide side plate 4. It is connected by an end fixing shaft 17, and a spring hook 18 integral with the mounting substrate 3 is provided at a position inside the connecting position.
8 and the spring end fixing shaft 17, a tension spring 19 is stretched, and the through hole 16 of the guide side plate 4 has the operation shaft 13
A support leg folding device for a table or the like, wherein the spring leg fixing shaft 17 is allowed to move when the moving part moves along the guide slit 12 in the folding direction. 2. The supporting leg folding device for a table or the like according to claim 1, wherein the mounting board 3 is provided with a stopper 20 with which the base end portion of the leg fixing tool 2 abuts when the leg fixing tool 2 is erected. 3. A pair of support leg folding devices such as a table according to claim 1, wherein each of the support legs 6 that are folded in the same direction is fixed, and each folding device is a single operation shaft 13 or an operation lever. A support leg folding device for a table or the like characterized in that it is interlocked with an operating rod 21 in which 14 are connected.