JP2508462Y2 - Leg device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leg device in which leg rods can be installed at predetermined intervals, and can be folded and stored in a central state when stored.

[0002]

2. Description of the Related Art For example, as shown in FIGS. 1 and 2, an X-shape in which a leg rod 1 is arranged at a predetermined interval in a rectangular position when seen from a plane, and an intersection 2 is pivotally attached between the leg rods 1. The rod members 3 are arranged, the end portions of the X-shaped rod members 3 are pivotally attached to the mounting portions 4 fitted on the leg rods 1, respectively, and the mounting portions 4 for pivoting the upper end portions are attached. There is a leg device which is configured to be slidable along the leg rod 1 and to which a mounting portion 4 for pivotally attaching the other lower end portion is fixed.

In such a leg device, the opening angle between the upper and lower ends of the X-shaped bar rod member 3 is changed by sliding the mounting portion 4 provided slidably along the leg rod 1 to change the leg angle. Adjusting the facing distance between the rods 1 or, when storing, open the opening angle between the upper and lower ends of the bar rod member 3 as shown in FIG. 3 to bundle the leg rods 1 in a centralized state between the square positions. You can

Such a leg device is often used, for example, in a leg portion of a folding chair as shown in FIG. 1 or a leg portion of a folding table shown in FIG.

[0005]

[Problems to be solved by the invention] As described above, it is necessary to support a considerable weight by being used for a chair or a table.
The X-shaped bar rod member of the conventional leg device is simply constituted by intersecting flat plate-shaped flat bars.
The bearing strength was extremely poor.

An object of the present invention is to find a drawback as described above in such a leg device capable of being bundled and stored, and to provide an excellent leg device which is improved.

[0007]

The gist of the present invention will be described with reference to the accompanying drawings.

A plurality of leg rods 1 are arranged at a predetermined interval, and an X-shaped bar rod member 3 having an intersection 2 pivotally mounted between the leg rods 1 is arranged, and the X-shaped bar rod member 3 is provided. End portions of the respective rods are pivotally attached to the mounting portions 4 provided on the rods 1, respectively, and at least the mounting portions 4 for pivotally attaching the upper or lower ends thereof are configured to be slidable along the rods 1 to form an X-shape. In the leg device capable of opening the opening angle between the upper and lower ends of the bar rod member 3 to bring the leg rods 1 toward the center side and folding and storing the leg rods 1 in a converged state, one side surface is formed flat. The X-shaped bar is formed by pivotally attaching the intermediate portions of the deformed bar rods 5 each having a hollow protruding strip portion 5B having a bulged central portion on the other side by abutting one side flat surface portions 5A. The present invention relates to a leg device in which the rod member 3 is configured.

[0009]

EXAMPLE A bar rod 5 constituting the X-shaped bar rod member 3 of this embodiment is shown in FIGS.

In this embodiment, a flat plate having a thickness smaller than that of a conventional flat metal plate (flat bar) is left on both sides of the flat plate, and the central portion bulges into a semi-cylindrical shape to form a hollow protrusion. Deformation-shaped rod 5 having a shape portion 5B formed in the longitudinal direction
And the flat portions 5A of the noodles on the opposite side of the bar rod 5 are superposed and pivotally attached to each other at the intermediate portion to form the X-shaped bar rod member 3.

It should be noted that even if the material used for the bar rod 5 is made thinner than before and is reduced by 20% in total, the bearing strength is about five times that of the conventional flat plate shape and the bearing strength is improved. Was confirmed.

The present invention is not limited to this embodiment, and may have a semicylindrical or semicircular cross section with no flat plate edges on both edges.

[0013]

Since the present invention is constructed as described above, since it has a protruding portion, even if the same material is used to form the same width or the material is further saved, it is possible to form an X-shaped crosspiece. The bending strength of the rod member is improved, and the bearing strength is improved.

Further, if a round pipe is simply used, it is difficult to pivot the pipe because it has to be crushed. In the present invention, however, a bar rod having a projecting ridge on one side is butted against a flat part on the opposite side to form a superposition pivot. Since the X-shaped rod member is formed, the leg device is excellent in that the rod can be easily pivoted, and the stability and pivotal holding strength of the pivot portion can be improved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a case where a leg device is used in a folding chair.

FIG. 2 is an explanatory diagram showing a case where a leg device is used for a folding table.

FIG. 3 is an explanatory view showing a state in which the leg device is folded and stored in a converged state with a leg rod being moved to the center.

FIG. 4 is a perspective view of a bar rod member of the present embodiment.

FIG. 5 is a cross-sectional view of the rail of the rail member of the present embodiment.

[Explanation of symbols]

 1 Leg Rod 2 Crossing Part 3 Bar Rod Member 4 Mounting Part 5 Bar Rod 5A One Side Plan View 5B Projecting Strip Part

Claims (1)

(57) [Scope of utility model registration request] 1. A plurality of leg rods are arranged at predetermined intervals, and an X-shaped bar rod member having an intersection pivotally mounted between the leg rods is provided.
The end portions of the X-shaped rod members are pivotally attached to the attachment portions provided on the leg rods, respectively, and the attachment portions that pivotally attach at least the upper or lower end portions are configured to be slidable along the leg rods. , A leg device capable of opening the opening angle between the upper and lower ends of the X-shaped bar rod member to bring the leg rods toward the center side and folding and storing the leg rods in a converged state, one side surface of which is formed flat. The middle portions of the deformed bar rods having the hollow protruding ridges with the central portion bulging on the other side surface are pivotally attached to each other by abutting the flat portions on one side thereof to form the X-shaped bar rod member. A leg device characterized by being configured.