JP2001193266A - Support leg for free access floor and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support leg for a free access floor capable of setting perpendicularity of a base plate and the support leg without damaging the external appearance of a commodity and without requiring much labor in manufacture and eliminating the looseness of the support leg even for long period use. SOLUTION: In the support leg vertically movably attaching a receiving plate 3 on the upper part of a support leg body 2 provided on the base plate 1, since the base plate 1 is integrally formed on the end of the support leg body 2 by pressing molding, the support leg body 2 is provided on the base plate 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support leg used for a free access floor (double floor type floor) corresponding to an office building or the like in which electric wiring is complicated due to the spread of OA equipment, and a method of manufacturing the same. Things.

[0002]

2. Description of the Related Art Conventionally, such a support leg for a free access floor is provided in a thread groove 12a of a support leg 12 provided on a base plate 11, as shown in FIGS.
Screw the long nut 14 provided on the receiving plate 13 into
The receiving plate 13 is attached to the upper part of the supporting leg 12 so as to be vertically movable.

In order to provide the support leg 12 on the base plate 11 in such a support leg for a free access floor, as shown in FIGS. 7 and 8, the lower end of the support leg 12 is provided on the upper surface of the base plate 11. 9 and 10, or by caulking by passing the lower end of the support leg 12 through a hole 11a provided substantially in the center of the base plate 11, as shown in FIGS.

[0004]

However, in the above-mentioned conventional supporting leg for a free access floor, the lower end of the supporting leg 12 is welded to the upper surface of the base plate 11 as shown in FIGS. Variations in welding strength are likely to occur due to the quality of the product itself, making it difficult to produce a product having a constant quality, and there is a problem that the exposed welded surface is conspicuous and impairs the appearance of the product.

Further, the conventional support leg for a free access floor is swaged by penetrating the lower end of the support leg 12 through a hole 11a provided substantially at the center of the base plate 11 as shown in FIGS. In the processed one, the swaged portion remains on the bottom back of the base plate 11 and the base plate 11 rattles if left as it is. There is a problem that extra processing is required and the production is troublesome.

In the above-mentioned conventional free-access floor support leg, when the support leg 12 is provided on the base plate 11 by welding or crimping, the base plate 11 and the support leg 1 are not used in the work process.
There was a problem that it was difficult to make the squareness of 2 above.

Further, in any of the above-mentioned conventional supporting legs for a free access floor, since the base plate 11 and the supporting legs 12 are separate from each other, the fixing of the both is not complete and the strength is high. There is a problem that the support leg 12 is loose during use for a long time.

Therefore, the present invention solves the above-mentioned conventional problems, and does not impair the appearance of the product, does not require any trouble in manufacturing, and makes it easy to obtain a right angle between the base plate and the support legs. An object of the present invention is to provide a support leg for a free access floor, which does not rattle even after long-term use, and a method for manufacturing the same.

[0009]

Therefore, a supporting leg for a free access floor according to the present invention is a supporting leg in which a receiving plate 3 is mounted on a supporting leg 2 provided on a base plate 1 so as to be vertically movable. The base plate 1 is formed integrally with the end of the body 2 by forging, and the support leg 2 is provided on the base plate 1.

Further, according to the method of manufacturing a supporting leg for a free access floor of the present invention, a plurality of metal rods M are inserted in series into the insertion hole 5a of the first die 5, and the metal rod M in the front row is inserted.
Is punched into the mold hole 6a of the second die 6, and the metal rod M
The end h of the metal rod M is preliminarily formed into a substantially hemispherical shape, and then the end h is flattened by punching with a punch 7 so that the end h of the metal rod M is used as the base plate 1 and further taken out from the first die 5. The support leg 2 is provided on the base plate 1 by forming the screw leg 2 a on the peripheral surface of the metal rod M to form the support leg 2.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a support leg for a free access floor according to an embodiment of the present invention.

As shown in FIGS. 1 and 2, the support leg for a free access floor according to the present invention is configured such that a long nut 4 provided on a receiving plate 3 is screwed into a thread groove 2 a of a support leg 2 provided on a base plate 1. The receiving plate 3 is attached to the upper part of the support leg 2 so as to be vertically movable.
In addition, a lock nut n for keeping the position-adjusted receiving plate 3 from moving at that position can be screwed into the thread groove 2a of the support leg body 2.

In the support leg for a free access floor as described above, the base plate 1 is formed integrally with the end portion of the support leg 2 by forging, and the support leg 2 is provided on the base plate 1. .

Therefore, in the support leg for a free access floor of the present invention, the base plate 1 and the support leg 2 are integrated with each other, and the two are completely fixed and have excellent strength. However, the support leg 2 does not rattle.

Next, the step of providing the support leg on the base plate in the method of manufacturing the support leg for a free access floor according to the present invention will be described with reference to the drawings.

First, as shown in FIG.
A plurality of metal rods M are inserted in series into the insertion holes 5a. Then, as shown in FIG. 4, the metal rod M in the front row is punched into the mold hole 6a of the second die 6, and the end h of the metal rod M is preliminarily formed into a substantially hemispherical shape. Next, as shown in FIGS. 5 and 6, the end h of the metal bar M is driven into a flat shape by driving the end h of the metal bar M with a punch 7 to obtain a molded product having the end h of the metal bar M as the base plate 1. . afterwards,
The molded product is taken out of the first die 5 and a screw groove 2a is formed on the peripheral surface of the metal rod M to form the support leg 2, whereby the support leg 2 is provided on the base plate 1.

Since the support leg for a free access floor of the present invention has the support leg 2 provided on the base plate 1 as described above, the insertion hole 5a of the first die 5 is provided.
The base plate 1 and the supporting leg 2 can be formed in the manufacturing process as long as the angle and the tip surface 5b of the first die 5 are perpendicular to each other.
It is very easy to make a right angle. further,
Since the base plate 1 is integrally formed at the end of the support leg 2 by forging the metal rod M, the strength of the base plate 1 does not vary, and a product of constant quality can be manufactured. In addition to being able to do so, unlike the conventional welding, the exposed welding surface does not noticeably impair the appearance of the product. Also, since the back surface of the base plate 1 has a shape corresponding to the striking surface 7a of the punch 7, if this striking surface 7a is flat, the back surface of the base plate 1 is also flat, as in a conventional caulking process. There is no necessity for raising the bottom in the vicinity of the caulked portion, no extra processing is required, and there is no trouble in manufacturing.

The support leg for a free access floor according to the present invention having the above-described structure is provided with a conventional floor panel by adjusting the degree of screwing of the screw groove 2a of the support leg 2 into the long nut 4. Similarly to the support legs, the height of the receiving plate 3 is raised in the lower part of the concrete floor, and the position of the receiving plate 3 is lowered in the higher part of the concrete floor, so that a plurality of floors, such as squares, laid on the concrete floor. By supporting each of the four corners of the panel (not shown), the floor panel is used so that the entire laying surface of the floor panel is adjusted to be at the same height.

[0019]

The support leg for a free access floor according to the present invention is constructed as described above, and the support leg does not rattle even after long-term use without impairing the appearance of the product. There was no one.

Further, in the method of manufacturing the support leg for a free access floor according to the present invention, no trouble is required in manufacturing, and the perpendicularity between the base plate and the support leg can be easily obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a support leg for a free access floor according to the present invention.

FIG. 2 is a sectional view of a supporting leg of the supporting leg for a free access floor of the present invention.

FIG. 3 is an explanatory view showing a step of providing a support leg on a base plate in the method of manufacturing a support leg for a free access floor according to the present invention.

FIG. 4 is an explanatory view showing a step of providing a support leg on a base plate in the method of manufacturing a support leg for a free access floor according to the present invention.

FIG. 5 is an explanatory view showing a step of providing a support leg on a base plate in the method of manufacturing a support leg for a free access floor according to the present invention.

FIG. 6 is an explanatory view showing a step of providing a support leg on a base plate in the method of manufacturing a support leg for a free access floor according to the present invention.

FIG. 7 is an explanatory view showing an example of a conventional support leg for a free access floor.

8 is a sectional view of a support leg of the conventional free access floor support leg shown in FIG. 7;

FIG. 9 is an explanatory view showing another example of a conventional free access floor support leg.

FIG. 10 is a sectional view of a support leg of the conventional support leg for a free access floor shown in FIG. 9;

[Explanation of symbols]

 Reference Signs List 1 base plate 2 support leg 3 receiving plate 5 first die 5a insertion hole 6 second die 6a die hole 7 punch M metal rod h end

Claims (2)

[Claims] 1. An end of a supporting leg (2) of a supporting leg for a free access floor in which a receiving plate (3) is vertically movably mounted on a supporting leg (2) provided on a base plate (1). A support leg for a free access floor, wherein a support leg (2) is provided on the base plate (1) in which the base plate (1) is integrally formed by forging. 2. A plurality of metal rods (M) are inserted in series into an insertion hole (5a) of a first die (5), and a metal rod (M) in the front row is formed into a mold of a second die (6). The end (h) of the metal bar (M) is preformed into a substantially hemispherical shape by punching into the hole (6a), and the end (h) is driven into a flat shape by punching with a punch (7). The end (h) of the metal rod (M) is used as a base plate (1), and is further taken out of the first die (5), and the screw groove (2) is formed on the peripheral surface of the metal rod (M).
A method for manufacturing a support leg for a free access floor, wherein the support leg (2) is provided on the base plate (1) by engraving a) to form the support leg (2).