JP3062945B2 - Floor support leg stand - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor support leg stand for supporting a support leg for supporting a floor at a predetermined height from a floor base such as a concrete slab.

[0002]

2. Description of the Related Art As a stand of this kind, there is a Japanese Utility Model 57
The thing described in -58639 is known. As shown in FIG. 21, a metal fitting 103 having a cylindrical body 101 to which a lower end of a support leg 100 is attached and a flange portion 102 provided between the cylindrical body 101 is supported by an elastic body 104. It is. The elastic body 104 is provided with a hollow portion 105 into which the cylindrical body 101 is inserted so as to vertically penetrate the center of the elastic body 104.
A recess 106 is formed adjacent to the upper end of the recess 10.
6 is a bearing surface 107 for receiving the flange portion 102 on the radially outer side.
Is formed. The fixing of the flange portion 102 to the cylindrical body 101 is achieved by welding, and the welded portion 108 is housed in the concave portion 106 so as to be invisible from the outside.

[0003]

In this conventional example, more than 80% of the total area of the lower surface of the flange portion 102 is the seat surface 107.
And the welded portion 108 also comes into contact with the bottom of the concave portion 106, so that the initial spring of the elastic body cannot be softened and the elastic body shrinks sensitively to the impact of the lightweight impact source on the floor. Therefore, it was difficult to improve the sound insulation performance.

Accordingly, an object of the present invention is to provide a floor support leg stand that softens an initial spring of an elastic body, absorbs a light impact sound, and improves sound insulation performance.

[0005]

In order to achieve the above object, the present invention relates to a floor support leg stand for supporting a support leg supporting a floor at a predetermined height from a floor base such as a concrete slab. An end is attached, a metal fitting having a flange portion in the middle of the cylindrical body, and an elastic body having a hollow portion into which the metal fitting is inserted and supported and grounded to the floor base, and a flange portion is provided on the upper surface of the elastic body. In this case, two or more ring-shaped protrusions are formed so as to make contact with the flange portion so as to reduce the contact area with the flange portion, thereby providing an empty portion between the lower surface of the flange portion and the upper surface of the elastic body.

[0006]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an example of a floor structure using the floor support leg stand of the present invention. The lower end of the support leg 2 is supported by the floor support leg stand 1, and the upper end of the support leg 2 is The lower surface of the floor 3 is supported. The lower surface of the floor support leg stand 1 is grounded on a floor base 4 such as a concrete slab. The floor support leg stand 1 includes a metal fitting 10 and an elastic body 11.
It consists of:

As shown in FIG. 2, the floor support leg stand 1 includes a metal fitting 10 comprising a cylindrical body 10A and a flange 10B formed in the middle of the cylindrical body 10A. Is formed with a female screw portion, and a male screw portion formed on the outer peripheral surface of the support leg 2 is screwed.
The elastic body 11 made of rubber or the like has a hollow portion 11A.
Are formed on the upper surface, and two ring-shaped projecting portions 11B that are in contact with the lower surface of the flange portion 10B are formed. Between the lower surface of the flange portion 10B and the upper surface of the elastic body 11,
An empty portion 13 is formed by the presence of the protruding portion 11B. In addition, a ring-shaped protrusion 11C is formed on the lower surface of the elastic body 11, and a slit 11D for communicating the cavity 11A with the outside is formed.

As shown in FIGS. 3 and 4, the elastic body 11 has ring-shaped projections 11E formed on the outer circumference side, the inner circumference circle and the middle of the outer circumference circle, respectively. The height can be formed lower than the height of the outer protrusion 11E, or three ring-shaped protrusions 11E can be arranged concentrically as shown in FIG. When the flange portion 10B is placed on these protruding portions 11E, an empty portion 13 is formed between the elastic body 11 and the flange portion 10B.

In the embodiment shown in FIGS. 6 and 7, a spacer 12 is provided between the flange portion 10B and the upper surface of the elastic body 11, and an empty portion 13 is formed between the two. As the spacer 12, a rubber O-ring was used. As such a spacer 12, two or more spacers having different diameters can be used. Even if the spacer 12 is provided, any one or more of the protruding portions 11B and 11E or a protruding portion 20 formed on a flange portion 10B described later can be combined.

The metal fitting 10 shown in FIGS. 8 and 9 has a ring-shaped projecting portion 20 formed on the lower surface of a flange 10B.
An empty portion 13 is formed on the lower surface of OB. 10 and 11
A plurality of protruding portions 20 are formed on the flange portion 10B of the metal fitting 10 shown in FIG. These projections 20 are elastic bodies 11
Contacting the protrusions 11B and 11E on the upper surface of the
An empty portion 13 is formed on the lower surface of B.

FIG. 12 to FIG. 15 show examples in which protruding portions 20 and 22 are formed on the metal fitting 10. The protruding portion 22 is made of the elastic body 1
It contacts the inner peripheral surface of one hollow portion 11A. Further, as shown in FIG. 16, the groove 11B 'for receiving the projection 20 is
1B (or 11E).

The graph shown in FIG. 17 is indicated by a in FIG.
1 is a conventional support leg stand in which the concave portion 106 is not formed; b is a support leg stand in which two ring-shaped protrusions 11B are formed only on the upper surface of the elastic body 11; What is shown is a floor support leg stand in which a slit 11D is formed on the lower surface of the elastic body 11 of the support leg stand indicated by b, and shows the spring characteristics of each elastic body. The method for measuring the spring characteristics is described in JIS K-638.
5 As is clear from the graph of FIG. 17, it was found that the elastic body of the floor support leg stand of the present invention has a larger shock absorbing force on the floor than the conventional elastic body because the initial spring is soft.

FIG. 18 shows a floor impact sound level measured when a floor is impacted by a lightweight impact source.
To c are floor support leg stands similar to those shown in FIG. The measuring method was based on JIS A-1418. The concrete slabs constituting the floor base are 150
mm, and a floor support leg stand was grounded on the concrete slab. As is clear from FIG. 18, the stand according to the present invention has a larger size than the conventional stand.
It is clear that the sound insulation performance has been improved over each frequency.

FIGS. 19 and 20 are graphs similar to FIGS. 17 and 18 in comparison between a support leg stand using the metal fitting 10 shown in FIGS. 8 and 9 and a conventional example (indicated by a in the graph). It is. In the graph, d indicates a support leg stand using the metal fittings shown in FIGS. 8 and 9.

[0016]

As described above, according to the present invention, the shock absorbing force is improved by making the contact area between the metal fitting and the elastic body smaller than in the prior art. Because the spring is softened, the absorbing power is improved and the sound insulation performance is improved. By forming two or more ring-shaped protrusions, the protrusions are less likely to be crushed even when an eccentric load is applied to the flange portion, and even if the contact area between the receiving member and the elastic body is small, the receiving member is elastically stable. I can support it. In addition, when a spacer made of a rubber O-ring is provided, it is possible to cope with a design change at low cost and on site.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a cross-sectional view in which two ring-shaped protrusions having different heights are formed.

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is a plan view in which three ring-shaped protrusions are formed.

FIG. 6 is a cross-sectional view in which a spacer is provided between a flange and an elastic body.

FIG. 7 is a plan view of FIG. 6;

FIG. 8 is a sectional view showing a protruding portion formed on the metal fitting.

FIG. 9 is a plan view of FIG. 8;

FIG. 10 is a sectional view showing a modified example of a protruding portion formed on a metal fitting.

FIG. 11 is a plan view of FIG. 10;

FIG. 12 is a sectional view showing a modification of the metal fitting.

FIG. 13 is a plan view of FIG. 12;

FIG. 14 is a sectional view showing still another example of the metal fitting.

FIG. 15 is a plan view of FIG. 14;

FIG. 16 is an enlarged sectional view of a protruding portion.

FIG. 17 is a graph showing the relationship between load and displacement between the conventional stand and the stand of the present invention.

FIG. 18 is a graph showing the results of measuring the impact sound absorbing performance of the conventional stand and the stand of the present invention.

FIG. 19 is a graph showing a relationship between a conventional stand and a load using the metal fittings shown in FIGS.

FIG. 20 is a graph showing the result of measuring the impact sound absorbing performance of the stands similar to that of FIG. 19;

FIG. 21 is a sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor support leg stand 2 Support leg 3 Floor 4 Floor base 10 Metal fitting 10A Cylindrical body 10B Flange part 11 Elastic body 11A Cavity part 11B, 11E Projection part 13 Empty part 20, 21, 22 Projection part

Claims (4)

(57) [Claims] 1. A floor support leg support for supporting a support leg for supporting a floor at a predetermined height from a floor base such as a concrete slab. And an elastic body having a hollow portion into which the metal fitting is inserted and supported and grounded to the floor base, wherein two or more ring-shaped protrusions are formed on the upper surface of the elastic body to contact the flange portion. A floor support leg stand characterized in that a contact area with the portion is reduced to provide an empty portion between the lower surface of the flange portion and the upper surface of the elastic body. 2. A stand for a floor support leg for supporting a support leg for supporting a floor at a predetermined height from a floor base such as a concrete slab. And an elastic body having a cavity in which the metal fitting is inserted and supported and grounded to the floor base. A spacer made of a rubber O-ring is provided between the flange and the elastic body, and a lower surface of the flange is provided. A floor support leg stand characterized in that a vacant portion is provided between the elastic member and the upper surface of the elastic member. 3. The stand for floor support legs according to claim 1, wherein a projection (20) projecting downward is formed on a flange portion of the bracket, and the projection (20) is formed of an elastic body. A floor support leg stand characterized by being brought into contact with the protruding portion (11B) or (11E). 4. The floor support leg stand according to claim 1, wherein a projection (22) projecting radially outward below a flange portion of a cylindrical body of the receiving member is formed. A floor support leg stand characterized in that the shape portion (22) is brought into contact with the inner peripheral surface of the hollow portion of the elastic body.