JP3211703B2 - Windbreak device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a windbreak device for reducing the wind speed by giving resistance to a strong wind flow and absorbing wind energy.

[0002]

2. Description of the Related Art In a large city, a so-called building-like phenomenon in which a strong wind blows between high-rise buildings is observed. This building style is an obstacle for passersby.
467, JP-A-5-133141, JP-A-6-185243, JP-A-7-62928, and JP-A-7-217254 (hereinafter Int. Cl. E04H).
Various technologies for reducing building wind have been proposed in the past, such as 9/14).

Generally, as windbreak measures to prevent building wind, building wind 2 generated along building 1 as shown in FIG.
A plant in which a tree 4 is planted in a portion 3 through which a tree passes is most often employed. By planting in this way, the tree 4 becomes a resistor of the wind 2 and absorbs energy, so that the wind speed of the building wind 2 can be reduced.

[0004]

However, in the conventional means for windproofing a building by planting, the following means are required.
There were various problems as described in (1). After planting, it takes more than one year to achieve the windbreak effect, such as roots and leaves growing, after planting. A larger space is needed for the roots to crawl than the above-ground part of the planting, and planting is not possible on artificial ground. In areas where the wind is too strong or shaded constantly, planting grows poorly, so it is greatly affected by the natural environment and the windbreak effect cannot be expected sufficiently. Maintenance such as disinfection of pests, watering, removal of weeds and defoliation is always required.

[0005] In view of the above-mentioned problems, the present invention provides a simple structure, which exhibits a windproof effect immediately after construction, makes it possible to select a ground condition and environment in a narrow installation place, and facilitates maintenance. It is intended to provide a device.

[0006]

In order to achieve the above object, according to a first aspect of the present invention, there is provided a windbreak device according to the present invention, wherein left and right pressure receiving surfaces are symmetrically arranged on a windward side where a wind blows with a swept angle .
The resistance plate formed by retreating so as to retreat downwind ,
The resistance plate is constructed so as to be rotatable about a symmetry axis of the resistance plate on a support.

According to a second aspect of the present invention, the resistance plate is formed of a perforated plate having an appropriately sized air hole.

According to the above construction, the windproof device of claim 1 is
When the wind hits the resistance plate, wind pressure acts on the symmetrically formed left and right pressure receiving surfaces. At this time, since the left and right pressure receiving surfaces have the same resistance plate rotatably mounted on the support column about the axis of symmetry, the resistance plate is stable in the direction in which the wind blows, that is, the left and right pressure receiving surfaces. The resistance plate is turned so that equal wind pressure acts on the surface, and the resistance plate is entirely opposed to the wind direction. For this reason, the wind that hits the resistance plate receives the resistance of the resistance plate that is facing directly, and at this time, wind energy is absorbed and the wind speed is reduced. In addition, the pressure receiving surface of the resistance plate is
When the direction of the wind changes and the direction of the wind becomes oblique to the resistance plate, the effective pressure receiving surfaces on the left and right sides with respect to the direction of the wind are effective. Since the dimensions are different and the effective area of the pressure receiving surface is different, a moment is generated on the resistance plate, and the resistance plate turns around the column so that the effective area of the pressure reception surface becomes equal, and the stable position Will calm down.

Further, in the windproof device of the present invention, the resistance plate is formed by a perforated plate provided with an appropriately sized air hole.
It is possible to reduce the weight of the resistance plate and to release part of the wind pressure from the wind hole when a severe storm blows during a typhoon etc., thus reducing the impact force acting on the resistance plate Thus, it is possible to prevent the windbreak device from being damaged.

[0010]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 to 5 show an embodiment of the windbreak device of the present invention, FIG. 1 is a perspective view, FIG. 2 is a plan view, FIG. 3 is a plan view showing an operation state, and FIG. 4 shows an installation state of the windbreak device. FIG. 5 is a front view, and FIG. 5 is a plan view showing the installation state of the windbreak device.

That is, as shown in FIG. 1 and FIG. 2, the windbreak device 10 of this embodiment comprises a resistance plate 12 for the wind W and the resistance plate 12.
And a support column 14 that rotatably supports the.
The resistance plate 12 includes left and right pressure receiving surfaces 12a around the symmetry axis C,
12b are formed symmetrically, and the left and right pressure receiving surfaces 12a and 12b are receded at the same receding angle θ as shown in FIG.

A rotary cylinder 16 is provided at the portion where the pressure receiving surfaces 12a and 12b are joined, and the rotary cylinder 16 is rotatably fitted to the upper end of the support post 14 around the axis of symmetry C. Is done. The lower end of the support 14 is fixed to the ground G, and the support 14 supports the resistance plate 12. In addition, the height of the support column 14 is the resistance plate 1.
The distance h between the ground 2 and the ground G is set so as not to hinder the passage of a person, and is configured, for example, as h = about 3 m.

When the windbreak device 10 is actually installed, as shown in FIG. 4 and FIG.
Are arranged neatly in a place adjacent to the building 18 where the building wind blows through.

With the above configuration, the windbreak device 1 of the present embodiment
In the case of 0, when the wind W hits the resistance plate 12, at the position where the resistance plate 12 faces the wind W, the same wind pressure acts on the symmetrically formed left and right pressure receiving surfaces 12a and 12b. On the other hand, as shown in FIG.
When the direction of the wind W is oblique, the effective dimensions a and b (a> b) of the left and right pressure receiving surfaces 12a and 12b differ from the direction of the wind W, and 12a, 1
The effective area of 2b differs. Therefore, the resistance plate 12
, A counterclockwise moment M is generated, and the resistance plate 12 turns around the rotary cylinder 16 so that the effective areas of the pressure receiving surfaces 12a and 12b become equal, and settles to the stable position shown in FIG.

Therefore, the wind W always hits the resistance plate 12 at the directly opposite position and receives the resistance of the resistance plate 12, and at this time, the wind energy is absorbed and the wind speed can be reduced. By providing a plurality of windproof devices 10 as shown in FIGS. 4 and 5, it is possible to effectively reduce the wind speed and suppress so-called building wind.

Further, the windbreak device 10 of the present embodiment can have a simple structure in which the resistance plate 12 is rotatably mounted on the column 14, and can be easily mounted if there is a space for mounting the resistance plate 12. it can. Furthermore, the windproof effect can be sufficiently exhibited when the windproof device 10 is installed, and the maintenance after the installation is significantly simplified by forming the windproof device 10 from aluminum or duralumin.

Further, the windbreak device 10 according to the present invention comprises:
There is also an advantage that this can be used as a monument attached to the building, and the resistance plate 12 can also be used as a signboard or other posting means.

In the above-described embodiment, the left and right pressure receiving surfaces 12a and 12b are each formed in a flat plate shape. However, the present invention is not limited to this, and as shown in FIG.
The curved surfaces 2a and 12b may be formed as curved surfaces that are curved in the retreating direction with respect to the wind direction of the wind W. Of course, even when formed as such a curved surface, the left and right pressure receiving surfaces 12
a and 12b are formed symmetrically.

Further, the pressure receiving surfaces 12a and 12b are
As shown in the figure, it is formed by a perforated plate 20 as a perforated plate,
As shown in FIG. 8, a mesh plate 22 as a perforated plate is used.
Can be formed. The perforated plate 20 has a large number of through holes 20a as air holes, and the mesh plate 22 has an infinite number of meshes 22a as air holes. The peripheral edge of the mesh plate 22 is the frame 2
Reinforced with 2b.

Therefore, in the embodiment shown in FIGS. 7 and 8,
The weight of the resistance plate 12 can be reduced by the through holes 20a and the meshes 22a. Also, when a very large storm blows during a typhoon or the like, a part of the wind pressure can be released from the through holes 20a and the mesh 22a.
The impact force acting on the resistance plate 12 can be reduced, and the windbreak device 10 can be prevented from being damaged.

[0021]

As described above, in the windbreak device according to the first aspect of the present invention, the left and right pressure receiving surfaces of the resistance plate are symmetrical and leeward with respect to the leeward wind with a sweeping angle.
Is formed so as to recede so as to retreat, and is mounted on the column so as to be rotatable around the axis of symmetry of the resistance plate, so that the resistance plate always turns in the direction opposite to the wind direction and stabilizes. Can be. For this reason, the wind receives the resistance of the resistance plate in the directly facing state, and at this time, the wind energy is absorbed and the wind speed can be reduced. Accordingly, it is possible to provide an inexpensive windbreak device as a simple configuration, and at the time the windbreak device is installed, the windbreak effect can be immediately exhibited, and
It can be installed in a small space and maintenance can be significantly simplified. In addition, the pressure receiving surface of the resistance plate should be swept away from the windward windward with a sweepback angle toward the leeward side.
When the direction of the wind changes and the direction of the wind becomes oblique to the resistance plate, the effective dimensions of the left and right pressure receiving surfaces differ with respect to the direction of the wind. Since the effective area of the pressure receiving surface differs, a moment is generated in the resistance plate, and the resistance plate turns around the column so that the effective area of the pressure reception surface becomes equal, and it is possible to settle down to a stable position. it can.

Further, in the windproof device according to claim 2 of the present invention, since the resistance plate is formed of a perforated plate provided with an appropriately sized air hole, the weight of the resistance plate can be reduced. In the event of a typhoon, etc., when an extremely large storm blows, part of the wind pressure is released from the air hole to reduce the impact force acting on the resistance plate, thereby preventing the windbreak device from being damaged Various excellent effects can be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a windbreak device of the present invention.

FIG. 2 is a plan view showing one embodiment of a windbreak device of the present invention.

FIG. 3 is a plan view showing an operation state of an embodiment of the windbreak device of the present invention.

FIG. 4 is a front view showing an embodiment of an installation state of the windbreak device of the present invention.

FIG. 5 is a plan view showing an embodiment of an installation state of the windbreak device of the present invention.

FIG. 6 is a plan view showing another embodiment of the windbreak device of the present invention.

FIG. 7 is a main part perspective view showing another embodiment of the resistance plate used in the windbreak device of the present invention.

FIG. 8 is a perspective view of an essential part showing another embodiment of the resistance plate used in the windbreak device of the present invention.

FIG. 9 is an explanatory view showing a conventional windbreak means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Windproof device 12 Resistance plate 12a, 12b Pressure receiving surface 14 Prop 20 Perforated plate 20a Through hole 22 Mesh plate 22a Mesh

Claims (2)

(57) [Claims] 1. A resistance plate formed by symmetrically moving left and right pressure receiving surfaces so as to retreat to the leeward side with respect to the windward direction where a wind blows at a sweepback angle. A windbreak device, which is rotatably mounted on a column around a symmetry axis of the windshield. 2. The windproof device according to claim 1, wherein the resistance plate is formed by a perforated plate having a suitably sized air hole.