JP2002129524A - Windbreak device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a windbreak device capable of effectively attenuating the wind force energy which blows down while changing its velocity and direction depending upon the altitude from the ground thereby turning the wind into a gentle one near the ground. SOLUTION: In a windbreak device provided with a windbreak means 11 installed in a freely rotatable manner on a support 10 erected upright, the windbreak device 11 is formed in a multi-stage configuration in the height direction of the support and by arranging a plurality of windbreak boards 13 adjacently located up and down with a deviation in position respectively between the boards 13 in the peripheral direction of the support 10 with all the boards connected together as one united body. Three windbreak boards 13 are arranged at the same level. The windbreak means 11 is equipped with a rotating body 12 for arranging the windbreak boards 13, and this rotating body 12 is installed in a freely rotating manner to the support 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of effectively attenuating wind energy of a downwind wind having a different wind speed and direction depending on altitude from the ground, and to moderate the wind reaching the ground. The present invention relates to a windbreak device that can perform

[0002]

2. Description of the Related Art The applicant of the present application has previously proposed a windbreak device in which a resistance plate having left and right pressure-receiving surfaces formed symmetrically is rotatably mounted on a column around the axis of symmetry of the resistance plate. See Heihei 10-238165). In this proposal, FIG.
As shown in (1), a resistance plate 1 for the wind W and a column 2 for rotatably supporting the resistance plate 1 are provided. The resistance plate 1
The left and right pressure receiving surfaces 1a and 1b are formed symmetrically about the axis of symmetry C, and the left and right pressure receiving surfaces 1a and 1b are retracted at an equal receding angle. Further, the pressure receiving surfaces 1a, 1
In the portion where b is coupled, a rotary cylinder 3 around the symmetry axis C is provided, and the rotary cylinder 3 is rotatably fitted to the upper end of the column 2. The lower end of the column 2 is fixed to the ground G, and the column 2 supports the resistance plate 1. The height of the support 2 is set so that the distance h between the resistance plate 1 and the ground G does not hinder the passage of a person.

[0003] Such a conventional windbreak device has a simple structure, and can exhibit the windbreak effect immediately after construction. It can be used in a narrow installation place regardless of the ground conditions and environment, and is easy to maintain. There is an advantage that there is.

[0004]

By the way, the wind that blows down from above, such as a building wind, has neither uniform wind speed nor wind direction depending on the altitude from the ground. The wind energy of the downwind wind whose wind speed and direction differ depending on the altitude can be more efficiently and effectively attenuated, and the wind speed or the wind energy on the ground can be sufficiently reduced. There is a demand for a device.

Accordingly, the present invention has been made in view of such a conventional problem, and it is possible to effectively attenuate the wind energy of a downwind wind having a different wind speed and direction depending on the altitude from the ground, and It is an object of the present invention to provide a windbreak device that can make the wind reaching the wind gentle.

[0006]

In order to achieve the above object, the present invention provides a windproof device according to the present invention, wherein the windproof device is provided with a rotatable windproof means on an upright support. A plurality of windshields arranged in a row in the height direction and vertically adjacent to each other, which are arranged so as to be displaced from each other in the circumferential direction of the column. .

[0007] Further, the invention is characterized in that a plurality of the windproof means are provided in multiple stages in the height direction of the column and rotatably provided on the column.

[0008] Further, at least two windshields are provided on the same step.
It is characterized in that at least two sheets are arranged.

Further, the windproof means includes a rotating body for arranging the windproof plates, and the rotating body is rotatably mounted on the support.

[0010]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. As shown in FIG. 1 and FIG. 2, the windbreak device of the present embodiment basically includes a column 10 having a considerable height standing at an installation position L such as a ground surface, and the column 10 being rotatable. It is mainly composed of windproof means 11 provided and rotating horizontally around the support column 10.

The windproof means 11 is formed in a hollow cylindrical shape having a lower end opened and an upper end closed, and is mounted on a support post 10 from above and rotatably supported, and a rotatable member 12 around the rotatable member 12. And a large number of windproof plates 13 provided to protrude radially outward of the rotating body 12.

Various structures are conceivable for rotatably supporting the rotating body 12 on the column 10. For example, although not shown, a tapered roller bearing capable of supporting a radial load and a thrust load is provided around the column 10. The rotating body 12 is attached to the column 10 via this bearing so as to be rotatable, and the weight of the rotating body 12 including the windbreak plate 13 is formed around the column 10 so as to contact the lower end of the rotating body 12. It is possible to adopt a structure or the like in which the supporting member is supported on the formed flange portion via a low-friction sliding plate or the like.

As described above, the rotating body 12 rotatably attached to the column 10 has a large number of windbreak plates 1 as described above.
3 is attached. All the windbreak plates 13 are of the same dimensions and are formed of a plate material having a constant width along the length thereof, and their base ends 13a are fixed to the peripheral surface of the rotating body 12, respectively, and the front ends 13b are horizontal. It extends toward the direction. These windbreak plates 13 are attached to the rotating body 12 in multiple stages in the height direction of the column 10 and in an arrangement in which vertically adjacent ones are displaced from each other in the circumferential direction of the column 10. Are integrally connected. Thus, when any one of the windshields 13 moves, all the other windshields 13 also move at the same time.

More specifically, referring to the illustrated example, the windbreak plate 13 is provided in seven steps in the height direction of the column 10. In each stage, three windbreak plates 13 are provided around the rotating body 12 at equal intervals,
That is, three sheets are provided at 120 ° intervals. Further, the windshields 13 are attached such that the vertically adjacent ones are displaced by 30 ° from each other around the rotating body 12. Therefore, with reference to any one of the uppermost windshields 13, the last lowermost windshield 13 that is sequentially shifted starting from one of the uppermost windshields 13 is one-eighth of the uppermost one.
It is shifted by 0 °.

The operation of the windproof device of the present embodiment configured as described above will be described. Basically, the windproof device swings right and left around the column 10 according to the turbulence of the wind blown by the windbreak plate 13. Thereby attenuating wind energy. In particular, the windbreak plates 13 are arranged in multiple stages in the height direction of the column 10, and the rotating bodies 1 are arranged in such an arrangement that vertically adjacent ones are displaced from each other in the circumferential direction of the column 10.
2, when the downwind wind F having different wind speeds and wind directions depending on the altitude from the ground acts on the windproof device, the windshields 13p, 13q, and 13r of each stage vertically arranged as shown in FIG. Among them, the windshield 13q at the stage where the wind blowing in the E direction with the largest wind energy f1 acts is the position 13q-1 or 1 facing the wind.
3q-2 according to the wind direction of the wind, and the windproof plate 1 integrally connected therewith via a rotating body 12.
All three will be moved simultaneously. Even during this rotation, and even in a state where the windbreak plate 13 in any stage swings while facing the wind of the largest wind force, the blown wind blows onto the surface of the windbreak plate 13 or It will be disturbed by the peeling action from the surface. Such an action is generated in the windshields 13 of all the stages against the wind F that blows down from the upper side to the lower side. The wind energy of the wind F can be reduced very effectively.

Then, the wind energy of the downwind wind changes in the height direction, and the wind blown to the windshield 13 at the other stage becomes the largest wind energy, so that the balance of the resistance action by the windshield 13 is broken around the column 10. When
The windbreak plate 13 of that stage is rotated according to the wind direction of the wind so as to face the wind, and at the same time, all the other windbreak plates 13 are simultaneously moved. An excellent windproof effect is exhibited by such a rotating action and a swaying action of the windproof means 11 as a whole, which are performed almost continuously in accordance with a change in a wind direction or a wind direction in a height direction from the ground surface or the like. I do.

FIG. 4 shows a conventional windbreak device (indicated by ■ in the figure) shown in FIG. 6 and a windbreak device according to the present embodiment (● in the figure).
The results of model tests comparing the performances of the two models are shown. On the vertical axis, when these windbreak devices are installed at the same position, using the ratio of the wind speed of the conventional windbreak device or the windbreak device of the present embodiment with either the windbreak device and the wind speed without the windbreak device Take the maximum wind speed reduction rate, and take the distance ratio from the windbreak device using the ratio of the horizontal distance from the windbreak device to the height of the windbreak device on the horizontal axis. This represents the wind speed reduction rate. Wind speed reduction rate is 1.0
The closer to, the lower the wind energy damping effect. From the test results, the windbreak device according to the present embodiment has a distance ratio of 0.2
It is understood that extremely excellent performance is exhibited between 5 and 1.5.

Further, in the windbreak device of the present embodiment, the movement of the windbreak means 11 in accordance with the change in the wind distribution or the wind direction is mainly performed by the rotation, so that the wind pressure received by the windbreak plate 13 acts so as to tilt the column 10. Can be prevented. Further, since all the windbreak plates 13 are collectively attached to the rotating body 12 and the rotating body 12 can be easily installed simply by rotatably mounting the rotating body 12 on the support 10, the construction cost can be reduced. . In addition, since the rotating portion is only one portion between the rotating body 12 and the support 10, the design in consideration of the rotational friction and the like is simple, and the noise accompanying the rotation is also small,
The equipment cost can be reduced. Further, the operation is mainly performed by rotation, and the movement of the multi-stage plural windbreak plates 13 is also beautiful.

FIG. 5 shows another embodiment of the windbreak device according to the present invention. Especially in this embodiment,
The windproof means 11a to 11c are provided in multiple stages in the height direction of the column 10, and three levels in the illustrated example, and these windproof means 11a to 11c are independently and rotatably supported by the column 10.

Various structures are conceivable for the structure in which the rotating body 12 of the second stage or lower is rotatably mounted on the support post 10.
The rotating body 12 is formed in a pipe shape, and the rotating body 12 of the lowermost windproof means 11c is inserted into the support post 10 from above, and a ring-shaped collar member (not shown) is inserted thereon so as to be overlapped.
There is a method in which the procedure of inserting the rotating body 12 of the windproof means 11b directly above is further repeated thereon, and finally, the windproof means 11a having the rotating body 12 exemplified in the above embodiment is attached to the column 10. Even in this case, a tapered roller bearing capable of supporting a radial load and a thrust load is separately provided between the rotating body 12 of each of the windproof means 11a to 11c and the support column 10, and the bearing is provided via the bearing. It is preferable that the rotating body 12 be rotatable with respect to the column 10 and that the weight of the windproof means 11a to 11c be supported by a collar member via a low friction sliding plate or the like.

The operation of the windbreak device of the present embodiment having the above-described structure will be described. The windbreak means 11a to 11c, which rotate independently of each other, are attached to the column 10 in multiple stages in the height direction. When a downwind wind having a different wind speed and a different wind direction depending on the altitude from the ground acts on the windbreak device, each of the windbreak means 11a to 11c in each stage is rotated according to the wind direction of the wind blown to them. Thus, it is possible to appropriately cope with different wind directions in the direction. In this way, the wind at the height of each of the wind protection means 11a to 11c and the wind can be accurately and individually captured by each of the wind protection means 11a to 11c in accordance with the wind direction, so that the wind energy can be further sufficiently attenuated. it can. Then, similarly to the above-described embodiment, such an action is generated in the windproof means 11a to 11c in all stages against the wind blown down from above, and the wind energy of the windproof means 11a to 11c in each stage is reduced. Due to the accumulation of the damping effect, the wind energy of the downwind can be reduced very effectively. In addition, the rotating action and the oscillating action of all of the windproof means 11a to 11c are performed almost continuously according to the change in the wind distribution and the wind direction in the height direction from the ground, thereby exhibiting an excellent windproof effect. I do.

In the above embodiment, the case where all the windbreak plates 13 are formed of a plate material having the same size and a constant width along the length direction has been described. It is not necessary to form all the windbreak plates 13 with a constant width, and each windbreak plate 13 is formed with different dimensions so that a certain type of molding can be obtained aiming at a design effect. The width in the length direction may be changed.

Further, in the above embodiment, the case where the number of the windshields 13 in each stage is three has been described as an example.
One sheet may be provided in each step. In particular, if the number of sheets is two or more, the windbreak plate 13 can be arranged in a line-symmetrical manner with the rotating body 12 interposed therebetween, stably receive the wind, and effectively reduce the wind energy. Can be attenuated.

Further, in the above embodiment, the case where the number of stages is seven has been described, but it is needless to say that the number of stages is two or more.

Further, in the above-described embodiment, the case where the misalignment angle of the vertically adjacent windshields 13 is set to 30 ° has been described. As long as the plate 13 is attached, the misalignment angle can be set arbitrarily.

In the above embodiment, the windproof means 1
The case where the number of installation steps of 1 is set to 3 steps has been described.
Needless to say, it is only necessary to have at least a step.

[0027]

As described above, in the windbreak device according to the present invention, the wind energy of the downwind wind having different wind speeds and wind directions depending on the altitude from the ground is effectively attenuated by the windbreak plates at each stage. The wind reaching the ground can be moderated by the accumulation of the damping effect of the windbreak plates.

In the case where the windbreak means is multi-stage, the wind can be accurately captured and attenuated individually by the windbreak means of each stage, and the wind reaches the ground by the accumulation of the attenuation effect by the windbreak means of each stage. The wind can be made gentler.

Further, since the movement of the windbreak means in response to the change of the wind distribution and the wind direction is mainly performed by the rotation, it is possible to prevent the wind pressure received by the windbreak plate from acting on the pillar.

Further, since the number of the windbreak plates at each stage is two or more, the windbreak plates can be arranged in a line-symmetrical manner with the struts interposed therebetween, and the wind can be stably received to effectively attenuate the wind energy. Can be done.

In addition, all the windbreak plates are arranged on a rotating body, and the rotating body can be installed simply by being freely rotatably mounted on a column, and can be easily installed.

[Brief description of the drawings]

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

FIG. 2 is a front view of the windbreak device shown in FIG.

FIG. 3 is a view for explaining the operation of the windbreak device shown in FIG. 1;

FIG. 4 is a graph for explaining the wind force reduction effect of the windbreak device according to the present invention.

FIG. 5 is a front view showing another embodiment of the windbreak device according to the present invention.

FIG. 6 is a perspective view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Prop 11 Windproof means 12 Rotating body 13 Windproof plate

Claims (4)

[Claims] 1. A windproof device having a windproof means rotatably provided on an upright support, wherein the windproof means is arranged in multiple stages in the height direction of the support and vertically adjacent to each other in the circumferential direction of the support. A plurality of windbreak plates arranged so as to be displaced from each other in an integrated manner. 2. The windproof device according to claim 1, wherein a plurality of said windproof means are provided in a plurality of stages in a height direction of said column and rotatably provided on said column. 3. The windproof device according to claim 1, wherein at least two or more windproof plates are arranged in the same step. 4. The apparatus according to claim 1, wherein the windproof means includes a rotating body for arranging the windproof plates, and the rotating body is rotatably mounted on the support. The windproof device as described.