JP3882493B2 - Wind protection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a windproof device capable of effectively attenuating wind energy of a downwind whose wind speed and direction are different depending on altitude from the ground, and to make the wind reaching the ground gentle.
[0002]
[Prior art]
The applicant of the present application has previously proposed a windbreak device in which a resistance plate in which left and right pressure receiving surfaces are formed symmetrically is attached to a support column around a symmetry axis of the resistance plate (Japanese Patent Laid-Open No. 10-238165). reference). In this proposal, as shown in FIG. 6, a resistance plate 1 of wind W and a support column 2 that rotatably supports the resistance plate 1 are configured. In the resistance plate 1, left and right pressure receiving surfaces 1a and 1b are formed symmetrically about a symmetry axis C, and the left and right pressure receiving surfaces 1a and 1b are moved backward with an equal receding angle. In addition, a rotating cylinder 3 having a symmetry axis C as a center is provided at a portion where the pressure receiving surfaces 1 a and 1 b are coupled, and the rotating cylinder 3 is rotatably fitted to the upper end portion of the column 2. The lower end portion of the support column 2 is fixed to the ground G, and the resistance plate 1 is supported by the support column 2. The height of the column 2 is set such that the distance h between the resistance plate 1 and the ground G does not hinder human traffic.
[0003]
In such a conventional windproof device, it has a simple structure and can exhibit the windproof effect immediately after the construction, and it is advantageous in that it is easy to maintain regardless of the ground conditions and environment in a narrow installation place. There is.
[0004]
[Problems to be solved by the invention]
By the way, the wind that blows down from the top, such as a building wind, is not uniform in wind speed and direction due to the altitude from the ground. Windbreak that can reduce the wind energy of the downwind with different wind speed and direction depending on the altitude more efficiently and more effectively, and can sufficiently reduce the wind speed on the ground or wind energy. There is a demand for devising a device.
[0005]
Therefore, the present invention has been made in view of such conventional problems, and it is possible to effectively attenuate the wind energy of the downwind that has different wind speed and direction depending on the altitude from the ground. An object of the present invention is to provide a windproof device that can be made gentle.
[0006]
[Means for Solving the Problems]
In order to achieve such an object, in the windbreak device of the present invention, in the windbreak device in which windproof means is rotatably provided on the upright column, the windbreak unit is multi-staged in the height direction of the column, and A plurality of windbreak plates that are vertically adjacent to each other and are arranged so as to be displaced from each other in the circumferential direction of the column are integrally formed.
[0007]
Further, the wind-proof means is provided in a plurality of stages in the height direction of the support column, and a plurality of wind-proof devices are provided on the support column to be rotatable.
[0008]
Further, at least two windproof plates are arranged on the same stage.
[0009]
Furthermore, the windproof means includes a rotating body for arranging the windproof plates, and the rotating body is rotatably mounted on the support column.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the windbreak device of this embodiment basically has a column 10 having a considerable height standing at an installation position L such as the ground surface, and the column 10 is rotatable. It is mainly comprised from the wind-proof means 11 which is provided and rotates around the said support | pillar 10 horizontally.
[0011]
The wind-proofing means 11 is formed in a hollow cylindrical shape with the lower end opened and the upper end closed, and is mounted on the support column 10 from above and is rotatably supported. The windbreak plate 13 is provided so as to project outward in the radial direction of the rotating body 12.
[0012]
Various structures are conceivable as a structure for rotatably supporting the rotating body 12 on the support 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 support column 10. The rotating body 12 is attached to the support column 10 via a bearing to be rotatable, and the weight of the rotating body 12 including the windbreak plate 13 is formed around the support column 10 so as to abut the lower end of the rotating body 12. Further, it is possible to employ a structure that supports the substrate via a low friction sliding plate or the like.
[0013]
As described above, a large number of windbreak plates 13 are attached to the rotating body 12 that is rotatably attached to the support column 10 as described above. All the windbreak plates 13 have the same dimensions and are formed of a plate material having a constant width along the length direction, their base ends 13a are fixed to the peripheral surface of the rotating body 12, respectively, and the tip end 13b is horizontal. It is extended toward the direction. These windbreak plates 13 are attached to the rotating body 12 in a multi-stage in the height direction of the support column 10 and vertically adjacent to each other in the circumferential direction of the support column 10. The windbreak plates 13 are integrally connected. As a result, when any of the windbreak plates 13 moves, all the other windbreak plates 13 move at the same time.
[0014]
More specifically according to the illustrated example, the windbreak plate 13 is provided in seven steps in the height direction of the support column 10. In each stage, three windproof plates 13 are provided around the rotating body 12 at equal intervals, that is, three at 120 ° intervals. Further, the windbreak plates 13 that are vertically adjacent to each other are attached so as to be displaced from each other by 30 ° around the rotating body 12. Therefore, if any one windproof plate 13 at the uppermost stage is used as a reference, the last lowermost windproof plate 13 that is sequentially displaced starting from that one is positioned 180 ° relative to the uppermost sheet. It is shifted.
[0015]
The operation of the windbreak device of the present embodiment configured as described above will be described. In this windbreaker, basically, wind force is generated by swinging left and right around the column 10 according to the disturbance of the wind blown by the windbreak plate 13. Attenuate energy. In particular, the windbreak plate 13 is attached to the rotating body 12 in an array in which the columns 10 adjacent to each other in the circumferential direction of the support column 10 are displaced from each other in the circumferential direction of the support column 10. When wind blown down with different wind speed and direction depending on altitude from the wind acts on the windbreaker, the largest wind energy f1 among the windbreak plates 13p, 13q, and 13r of each stage arranged vertically as shown in FIG. The windbreak plate 13q of the step on which the wind blown in the E direction acts is rotated to the position 13q-1 or 13q-2 facing the wind according to the wind direction of the wind, and together with this through the rotating body 12 All the connected windshields 13 are moved simultaneously. Even when the windbreak plate 13 at any stage swings while facing the largest wind force during the rotation, the blown wind is blown onto the surface of the windbreak plate 13 or the windbreak plate 13. It is disturbed by the peeling action from the surface. Such an action is generated in the windbreak plates 13 at all stages against the wind F blowing down from above, and the wind energy is attenuated by the accumulation of the wind energy attenuation effect by the windbreak plates 13 at each stage. Wind energy of the wind F can be reduced very effectively.
[0016]
And when the wind energy of the wind blown down changes in the height direction and the wind blown to the windshield plate 13 at the other stage becomes the largest wind energy, and the balance of the resistance action by the windshield plate 13 collapses around the column 10, The windbreak plate 13 at that stage is rotated according to the wind direction of the wind so that it faces the wind, and at the same time, all other windbreak plates 13 are moved simultaneously. And, the rotation action and the swing action as the wind protection means 11 as a whole are performed almost continuously according to the change in the wind distribution and the wind direction in the height direction from the ground surface or the like, thereby exhibiting an excellent wind protection effect. To do.
[0017]
FIG. 4 shows model test results comparing the performance of the conventional windproof device shown in FIG. 6 (indicated by ▪ in the figure) and the windproof device according to the present embodiment (indicated by ● in the figure). Using the ratio of the wind speed of the conventional windbreaker or the windbreaker of this embodiment with the windbreaker and the wind speed when no windbreaker is installed on the vertical axis, when these windbreakers are installed at the same position The maximum wind speed reduction rate of the windbreaker is taken and the horizontal axis uses the ratio of the horizontal distance from the windbreaker to the height of the windbreaker. It represents the wind speed reduction rate. The closer the wind speed reduction rate is to 1.0, the lower the wind energy attenuation effect. From the test results, it is understood that the windbreaker according to the present embodiment exhibits extremely excellent performance at a distance ratio of 0.25 to 1.5.
[0018]
Further, in the windbreak device of the present embodiment, since the movement of the windbreak means 11 according to the change in the wind force distribution and the wind direction is mainly the rotation operation, the wind pressure received by the windbreak plate 13 is prevented from acting so as to tilt the column 10. it can. In addition, since all the windbreak plates 13 are attached to the rotating body 12 in a lump and the rotating body 12 can be easily installed simply by being rotatably attached to the support column 10, the construction cost can be reduced. . In addition, since the rotating part is only one part between the rotating body 12 and the support column 10, the design in consideration of the rotational friction is simple. Therefore, the noise accompanying the rotation is small and the apparatus cost can be reduced. Furthermore, the operation is mainly rotating, and the movement of the multistage windbreak plates 13 is also beautiful.
[0019]
FIG. 5 shows another embodiment of the windproof device according to the present invention. Particularly in this embodiment, the wind-proofing means 11a to 11c are provided in multiple stages in the height direction of the support column 10, and in the illustrated example, three stages are provided, and these wind-proofing means 11a to 11c are independently rotatable on the support column 10. Supported by
[0020]
Various structures are conceivable as a structure in which the second-stage or lower rotating body 12 is rotatably attached to the support column 10. The rotating body 12 is formed in a pipe shape on the support column 10, and the rotating body 12 of the windproof means 11 c at the bottom from the top. Is inserted in such a manner that a ring-shaped collar member (not shown) is superimposed thereon, and the procedure for inserting the rotating body 12 of the windproof means 11b immediately above is repeated thereon. Finally, the above embodiment is exemplified. There is a method of attaching the wind-proof means 11 a having the rotating body 12 to the column 10. Even in this case, a taper roller bearing capable of supporting a radial load and a thrust load is individually provided between each of the rotating bodies 12 of the wind-proofing units 11a to 11c and the support column 10, and the bearings are interposed therebetween. Thus, it is preferable that the rotating body 12 is rotatable with respect to the support column 10 and the weight of the windproof means 11a to 11c is supported by the collar member via a low friction sliding plate or the like.
[0021]
The operation of the windproof device of the present embodiment configured as described above will be described. Since windproof means 11a to 11c that rotate independently of each other are attached to the support column 10 in multiple stages in the height direction, from the ground. When the wind blown down with different wind speeds and wind directions depending on the altitude of the wind acts on the windproof device, the windproof means 11a to 11c at each stage are rotated according to the wind direction of the wind blowing on them, and in the height direction. It is possible to appropriately cope with different wind directions. As described above, since each windbreak means 11a to 11c can accurately capture the wind according to the wind force and the wind direction at the height of each windbreak means 11a to 11c, the wind energy can be further sufficiently attenuated. it can. And like the said embodiment, such an effect | action will generate | occur | produce in the wind-proof means 11a-11c of all the stages with respect to the wind which blows down from upper direction, and the wind energy of the wind-proof means 11a-11c of each stage is carried out. By accumulating the damping effect, the wind energy of the downwind can be reduced very effectively. And the rotation action and the swing action action of all such wind-proof means 11a-11c are performed almost continuously according to the change in the wind direction distribution and the wind direction in the height direction from the ground, thereby exhibiting an excellent wind-proof effect. To do.
[0022]
In the above embodiment, all the windbreak plates 13 have the same dimensions, and the case where they are formed of a plate material having a constant width along the length direction has been described as an example. It is not necessary to form all the windbreak plates 13 with each other, but each windbreak plate 13 may be formed with different dimensions so that a certain shape can be obtained with the aim of a design effect. You may make it change the width | variety.
[0023]
Further, in the above embodiment, the case where the number of the windproof plates 13 in each step is three has been described as an example, but one plate may be used in each step, and in particular, if two or more, the rotation is performed. The windbreak plate 13 can be arranged in a line-symmetric form across the body 12, and the wind energy can be received stably and the wind energy can be effectively attenuated.
[0024]
In the above embodiment, the case where the number of stages is set to 7 has been described, but it is needless to say that the number of stages may be two or more.
[0025]
Moreover, in the said embodiment, although the case where the position shift angle of the windshield board 13 adjacent up and down was 30 degrees was demonstrated, the windshield board 13 was arranged in the arrangement | sequence which goes around at least the rotary body 12 by all the windshield boards 13. As long as it is attached, the misalignment angle can be arbitrarily set.
[0026]
Moreover, in the said embodiment, although the case where the number of installation steps of the wind-proof means 11 was 3 was demonstrated, of course, what is necessary is just 2 steps or more.
[0027]
【The invention's effect】
As described above, in the windbreak device according to the present invention, the wind energy of the downwind that has different wind speed and wind direction depending on the altitude from the ground can be effectively attenuated by the windbreak plate of each stage, The wind reaching the ground can be made gentle by accumulating the damping effect of these windbreak plates.
[0028]
In addition, when the windbreak means is multi-stage, the windbreak means of each stage can individually capture and attenuate the wind individually, and the wind reaching the ground can be further increased by accumulating the attenuation effect by the windbreak means of each stage. It can be gradual.
[0029]
Moreover, since the movement of the wind-proof means according to the change in the wind force distribution and the wind direction is mainly the rotation operation, it is possible to prevent the wind pressure received by the wind-proof plate from acting so as to tilt the column.
[0030]
In addition, since the number of windbreak plates at each stage is two or more, the windbreak plates can be arranged in a line-symmetric form across the support, and the wind energy can be stably received and the wind energy can be effectively attenuated. it can.
[0031]
In addition, all the windbreak plates are arranged in a rotating body, and can be installed simply by mounting the rotating body on a support column so as to be easily installed.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a windproof device according to the present invention.
FIG. 2 is a front view of the windproof device shown in FIG. 1;
FIG. 3 is a view for explaining the operation of the windproof device shown in FIG. 1;
FIG. 4 is a graph for explaining the wind force reducing effect of the windbreak device according to the present invention.
FIG. 5 is a front view showing another embodiment of the windproof 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)

In the windbreak device in which windproof means is provided on a standing column so as to be rotatable, the windbreak means is arranged in multiple stages in the height direction of the column, and vertically adjacent ones are displaced from each other in the circumferential direction of the column. And a plurality of windproof plates arranged in an integrated manner. The windproof device according to claim 1, wherein a plurality of windproof means are provided in a plurality of stages in the height direction of the support columns and rotatably on the support columns. The windproof device according to claim 1 or 2, wherein at least two windproof plates are arranged on the same stage. The windproof device according to any one of claims 1 to 3, wherein the windbreak means includes a rotating body for arranging the windproof plates, and the rotating body is rotatably mounted on the support column.

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