JPH02104862A - Damping floor unit - Google Patents

Abstract

PURPOSE:To prevent production of uncomfortable vibration that is likely to occur at the floor surface of a building in long span structure by providing a floor board and its supporting members and by installing a damping device, composed of a damping member and a weight that is capable of moving up and down through the damping member, to the underside of the floor board in a way of forming a damping space. CONSTITUTION:A damping floor unit 1 is made from a panel 2 formed of a floor board 2a in fixed dimensions and four legs 2b, and is fixed to a slab 10. Supporting members 3 are fixed to the end of the underside of the floor board 2a, and the undersides of the supporting members 3 are supported afloat over the slab 10 with a plate member 13. A damping device 12, formed of a board-shaped damping member 5 and a weight 7, is installed, making its vibration period nearly identical to that of the slab 10. Vertical vibration produced by walking on a floor surface 11 is decreased by the vibration in a 90 deg. phase deviation of the damping device 12, and almost all vibration energy produced at the floor surface 11 is absorbed. Thereby, a damping function can be easily given to the existing double-floor structure.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a vibration-damping floor unit that reduces and absorbs the shaking of a slab due to walking or the like, which is suitable for use as a floor member of a large-span building.

(b), Conventional technology Conventionally, in large-span buildings such as supermarkets, warehouses, and pedestrian bridges where many people frequently walk, vibrations mainly occur in the vertical direction in the slab due to people walking or jumping. We are at the stage where countermeasures have finally begun to be proposed.

In reality, no vibration countermeasures have been taken.

(C) 1 Problems to be Solved by the Invention However, this method has the disadvantage that unpleasant vibrations occur in the slabs of large span buildings such as the supermarket 1-1 warehouse and pedestrian bridge. Also,
In locations where office automation equipment such as computers is installed, slab vibrations pose a risk of causing malfunctions of the equipment.

In order to solve the above-mentioned problems, the present invention is designed to replace a part of the upper floor of an existing double floor such as an OA floor, or to install it directly on a subfloor such as a concrete slab. The object of the present invention is to provide a vibration-damping floor unit that can effectively reduce and absorb slab vibrations that occur in large-span buildings.

(d) Means for Solving 6 Problems, ie 1 The present invention provides a floor plate (2a) formed to a predetermined size and a fixed support means (2b) for the floor plate (2a).
a) A damping space (21) is provided at the bottom, and a weight (7) is provided in the damping space (21) so as to be movable in the vertical direction via damping members (5, 8). vibration damping device (12)
It is configured by installing.

Further, the vibration damping device (12) is suspended from a plate-shaped vibration damping member (5) fixed to the floorboard (2a) via a support member (3) and the plate-shaped vibration damping member (5). It can also be composed of a weight (7).

Furthermore, the vibration damping device (12) is connected to a plurality of bending vibration damping members (
8) and a weight (
7) is also possible.

Note that the numbers in parentheses are for convenience to indicate corresponding elements in the drawings, and therefore, this description is not limited to the descriptions on the drawings.
The same applies to the column "Effect".

(e) 1 Effect: With the above-described configuration, the present invention operates so that the vibration damping device (12) provided under the floorboard (2a) effectively reduces and absorbs vibrations of the slab (10).

(f), Example Hereinafter, the present invention will be described in detail based on the drawings.

FIG. 1 is a plan view showing an embodiment of a damping floor unit 1- according to the present invention, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIG. 4 is a sectional view taken along line IV-IV in FIG. 3; FIG. 5 is a plan view showing one embodiment of the damping floor unit; FIG. 6 is a sectional view taken along line IV-IV in FIG. 7 is a sectional view showing an example of the configuration of a damping member, FIG. 8 is an enlarged view of a portion of the viscous damper in FIG. 5, and FIG. 9 is a sectional view taken along the line VI-VI. FIG. 3 is a plan view showing an example of a constructed floor surface.

As shown in FIG. 9, the floor surface 11 is formed horizontally by a plurality of pillars 20 erected at intervals of, for example, 10 m in a large-span building 19, or by a plurality of beams 22 extending between the pillars 20. It is provided in a form installed on the supported slab 10,
A plurality of vibration damping floor units 1 are installed in the center of the floor 11 so as to form part of the floor 11.

As shown in FIGS. 1 and 2, the vibration damping floor unit 1 includes:
It has a panel 2 formed into a table shape from a floor plate 2a of approximately 50 am square and four legs 2b, and the panel 2 is placed on a slab 10 with four legs 2b horizontally supporting the floor plate 2a. On the lower side in FIG. 2 of the six fixedly provided floor plates 2a, two substantially rectangular parallelepiped-shaped support members 3, 3 are attached to the floor plates 2a, respectively.
A rectangular face member 13 such as a steel plate is provided on the lower side of the two support members 3.3 in FIG. It is provided horizontally floating above the slab 10 to fix the spacing. Moreover, between the support members 3.3, the floor plate 2a and the surface material 13
The vibration damping member 5 made of a damping steel plate and a weight 7 are arranged in a space sandwiched between the vibration damping members 5 and a weight 7, and are adjusted to have a vibration period that is almost the same as the vibration period of the device. The plate-shaped vibration damping member 5 is provided in a manner such that it extends between the surface support members 3 and 3 via a metal fulcrum 6 provided in the recess 3a of each support member 3. On the lower side of the vibration member 5 in FIG. It is suspended from the member 5 and is provided in a floating manner.

In addition, the plate-shaped vibration damping member 5 is shown in FIG.
2. A plate-shaped viscoelastic body 5a is sandwiched between plate springs 5b, 5b from both sides to form a plate-shaped integral body, and 1- the plate-shaped vibration damping member 5 is used as the plate-shaped vibration damping member 5. in the narrow direction, that is, the second
It can exert an elastic spring function and a viscous damper function against vibrations in the directions of arrows E and f'' in the figure.
There is sufficient space between the plate-shaped damping member 5 and the floorboard 2a and between the weight 7 and the member 13 in the vertical direction, that is, in the directions of arrows E and F. Even if it vibrates up and down, it will not come into contact with the floorboard 2a or +, 4']-3.

[Vibration damping floor unit] has the above configuration, so
The vertical vibration of the floor surface 11 that occurs when a person walks on the floor surface 11 on which the damping floor unit 1-1 is installed is reduced and absorbed as described below.

That is, when a person walks on the floor surface] 1, the floor plate 2a vibrates downward using the legs 2b as a fixed support point, that is, in the directions of arrows E and F due to the weight of the person. The floor plate 2a is connected to the plate-shaped vibration damping member 5 and the weight 7 suspended thereon via the support members 3, :3.
The vibration on the plate is transmitted to the plate vibration damping member 5 via the support member 3.3.
and is transmitted to the weight 7. Then, the plate-shaped damping member 5 becomes
As already mentioned, the plate-shaped vibration damping member 5 has viscoelastic properties and the weight 7 is suspended from the plate-shaped vibration damping member 5.
The vibration damping device 2, which consists of a weight 7 and a weight 7, vibrates at a 90" phase with respect to the vertical vibration of the floor plate 2a. As a result, the vibration energy of the floor surface 11 is effectively absorbed. As a result, the -h vibration of the floor surface 11 is reduced and absorbed.

In the above embodiment, the vibration damping device 12 is composed of a plate-shaped vibration damping member 5 and a weight 7 suspended from the plate-shaped vibration damping member 5. Although we have explained the case where the hanger is used by passing it between the three spaces, Figures 3 and 4
As shown in the figure.

It is also possible to use a vibration damping device 12 consisting of an arcuate spring-shaped bending damping member 8 and a weight 7 supported by the bending damping member 8. Hereinafter, a case will be described in which a vibration damping device 12 consisting of a curved vibration damping member 8 shaped like an arcuate spring and a weight 7 supported by the vibration damping device 12 is used.

That is, as shown in FIGS. 3 and 4, the damping floor unit 1 has a panel 2 formed into a table shape from a floor plate 2a with approximately 50 corners and four legs 2b. Four legs 2b are fixedly provided on the slabs 1, 0 so as to horizontally support the floorboard 2a. On the lower side of the floor plate 2a in FIG.
It is fixed by bolts on the four sides of a, and the lower side of the four supporting members 3 in FIG. )
A support plate 15 is provided horizontally to connect and fix the support members 3 to each other. Further, on the lower side of the support plate 15 in FIG. 4, a substantially square face material 13 such as a steel plate is horizontally provided floating from the slab 10 in order to improve the rigidity of the support plate 15.

Furthermore, between the support members 3 and 3, there are four bending vibration damping members 8 (
8A, 813.8G, 8D) and the weight 7, the vibration period is adjusted to have almost the same vibration period as the natural vibration period in the direction of the device. Each bending damping member 8
As shown in FIG. 4, these are formed into a clip shape with an LJ-shaped cross section, and one end is fixed to the upper side of the center of each of the four sides of the support plate 15 in the figure. Swing member 8
At the upper end of the figure, a substantially rectangular parallelepiped weight 7 made of iron or the like and having a weight of, for example, 50 mm is attached to the lower surface of the weight 7 at the arrow E. It is supported by the bending damping member 8 through four substantially rectangular parallelepiped-shaped notches 7b formed at a depth L3 that is approximately the same as the length in the F direction, and is provided in a floating manner. In addition, as shown in FIG. 7, the bending damping member 8 includes a plate-shaped viscoelastic body 8a that is attached to plate springs 8h and 8b from both sides.
It is formed by integrally forming a plate shape by sandwiching it between the bending damping member 8 and bending it into the shape described above. It is possible to demonstrate the function and viscous damper function. In addition,
Between the weight [7 and the floorboard 2a and between the weight 7 and the surface material 13]
has sufficient space in the vertical direction, that is, in the directions of arrows E and F, so even if the weight 7 vibrates vertically, the floorboard 2a and the surface material 1
There will be no contact with 3rd class.

In addition, since the weight 7 is supported by the bending vibration damping member 8 via the notch 7b, the floor plate 2a, the face materials 13 and 4
The weight 7 can occupy most of the damping space 21 surrounded by the supporting members 3 (excluding the space where the bending damping member 8 is installed), and even if the damping space 21 is relatively thin. A weight 7 having a predetermined weight can be built in, so that the thickness L4 of the entire vibration damping floor unit 1 can be reduced.

In the above two embodiments, a case was explained in which a combination of the damping member 5.8 and the weight 7 was used as the damping device 12, but as shown in FIGS. 5 and 6, It is also possible to use a damping device 12 consisting of a coil spring]-6 and a viscous damper 17. Hereinafter, a case will be described in which a vibration damping device 12 including a coil spring 16 and a viscous damper 17 is used.

That is, as shown in FIGS. 5 and 6, the damping floor unit 1 has a panel 2 formed into a table shape from a floor plate 2a of approximately 50 m square and four legs 2b. Four j12b are fixedly provided on the slab 10 so as to horizontally support the floorboard 2a. On the lower side of the floor plate 2a in FIG.
The right side is fixed by bolts on the four sides of a.
On the lower side of the four support members 3 in FIG. 6, a substantially square support plate 15 is provided horizontally floating from the slab 10 to fix the support members 3 to each other. Furthermore, on the second side of the support plate 15 in FIG. 6, there are four coil springs 16,
The vibration damper 17 and the weight 7 are arranged in a state where the vibration period is adjusted to be approximately the same as the natural vibration period in the direction of the device. Viscous damper 1
Reference numeral 7 is provided at the center of the support plate 15, and four coil springs 6 are fixed to surround the viscous damper 17 and act in the vertical direction near the four corners of the support plate 15. There is. Furthermore.

Above the viscous damper 17 and the four coil springs 16 in FIG. Through a cylindrical hole 7a formed in the weight 7,
It is provided so as to be housed in the hole 7a.

In addition, as shown in FIG. 8, the viscous damper 17 has a metal lower body 17a formed in a tip shape that is connected to the support plate 15.
A highly viscous oil 17b is injected into the lower body 17a.

Furthermore, above the oil 17b in the figure, the lower body 17
A metal upper body 1 formed into a tip shape smaller than a
7c is in the opposite direction, that is, it covers the oil 17b,
The upper body 17c and the lower body 17a are vertically spaced apart by a distance ILL. oil of distance jliL2 in the horizontal direction]. ．．
It has 7b layers. In addition, there is sufficient space between the weight 7 and the floor plate 2a and between the weight 7 and the support plate 15 in the vertical direction, that is, in the direction of arrows 1 and F, so that the weight 7 does not vibrate vertically. It does not come into contact with the floor plate 2a or the support plate 15.

Since the vibration damping floor unit 1 has the above configuration,
The configuration of the vibration damping device 12 is different from the above two embodiments (in contrast to the two embodiments described above, it is composed of vibration damping members 5 and 8 and a weight 7, but in this embodiment, a coil spring is used). ],
6, consists of a viscous damper 17 and a weight 7. ), the damping function is the same, so the vibration damping function is the same as that of the floor 11. The vertical vibration of is effectively reduced and absorbed by the mechanism described in the first embodiment.

In addition, since the coil spring 16 and the viscous damper 17 are provided in a manner that they are housed in the hole 7a formed in the weight 7, it is possible for the weight 7 to occupy most of the vibration damping space 21. Even in a relatively thin vibration damping space 21, a weight 7 of a predetermined weight can be built in, so that the vibration damping floor unit 1-1
Overall thickness ■.

Is it possible to make 4 thinner?

Note that the damping floor unit according to the present invention has a predetermined size, for example, 50 mm, as explained in the above embodiment.
Since the floorboard 2il of about i square is formed as one unit 1-, the degree of freedom in construction is high.

Not only when constructing a new floor on the slab 10, but also when constructing a new floor on the existing 0Δ floor or other double-layer floor, the number of sheets necessary to exhibit the vibration damping function can be installed in this damping floor unit 1-1. It can also be replaced.

(g) 0 Effects of the Invention As explained above, the present invention provides a fixed support means for the floorboard 2a, such as a floorboard 2a formed to a predetermined size such as a 501 square, and legs 2b, at the bottom of the floorboard 2a. It is provided to form a vibration space 21, and the weight 7 is inserted into the vibration damping space 2 through vibration damping members made of damping steel plates such as the plate-shaped damping member 5 and the bending damping member 8, as indicated by the arrows E, Since the structure includes a vibration damping device 12 that is movable in the vertical direction such as the horizontal direction, it is possible to effectively reduce and absorb vibrations generated on the floor surface 1.

It is possible to prevent the occurrence of unpleasant vibrations. In addition, by replacing the upper floor of an existing double floor with the number of vibration damping floor units necessary to achieve the vibration damping function, it is possible to easily add vibration damping function to the existing double floor. It becomes possible.

Furthermore, if the vibration damping device 2 is composed of a plate-shaped vibration damping member 5 fixed to the floor plate 2a via a support member 3 and a weight 7 suspended from the plate-shaped vibration damping member 5, It becomes possible to effectively reduce and absorb vibrations in the vertical direction such as the directions of arrows E and F that occur on the surface 11, and it is possible to prevent unpleasant vertical vibrations from occurring.

Furthermore, if the vibration damping device 2 is composed of a plurality of bending vibration damping members 8 fixed to the floor plate 2a via the support member 3 and a weight 7 supported by the bending vibration damping members 8, Vibrations in the vertical directions such as the directions of arrows E and F on the surface 11 can be effectively reduced and absorbed, making it possible to prevent unpleasant vibrations from occurring on the floor surface 1].

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the vibration damping floor unit 1- according to the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a vibration damping floor unit according to the present invention. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3; 5 is a plan view showing an embodiment of the damping floor unit; FIG. 6 is a cross-sectional view taken along the line ■-■ in FIG. 5; FIG. This figure is an enlarged view of a portion of the viscous damper shown in FIG. 5, and FIG. 9 is a plan view showing an example of a floor surface on which a damping floor unit according to the present invention is installed. 1... Vibration damping floor unit 1-2a... Floor plate 2b... Fixed support means (legs) 3... Support member 5... Vibration damping member (plate-shaped damping member) 7...
- Weight 8... Vibration damping member (bending vibration damping member) 12...
... Vibration damping device 21 ... Damping space Original person Mitsui Construction Co., Ltd. agent Patent attorney Phase 1) Shinji (and 2 other people) Fig. 1 1 2---Beat------ 3rd Figure 4 Figure 5 Figure 1 to 9. ．． 41:, ) Fig. 6 44A sweeping darkness Fig. 9 Fig. 弗 1st wave 'M$2 19 No. 8
figure

Claims (3)

[Claims] (1) A floor plate formed to a predetermined size and a fixed support means for the floor plate are provided to form a vibration damping space at the bottom of the floor plate, and a weight is placed in the vibration damping space in the vertical direction via a vibration damping member. A vibration damping floor unit constructed by installing a movable vibration damping device on the floor. (2) The vibration damping device is constituted by a plate-shaped vibration damping member fixed to the floorboard via a support member and a weight suspended from the plate-shaped vibration damping member. Vibration damping floor unit. (3) The vibration damping device is constituted by a plurality of bending vibration damping members fixed to the floorboard via a support member and a weight supported by these bending vibration damping members. Vibration damping floor unit.