JP4191650B2 - Visibility disorder mitigation device - Google Patents

Description

  The present invention relates to an apparatus for mitigating a decrease in the visibility of roads and tracks caused by snowstorms.

Conventionally, snow fences such as a blow-off type, a sump-type, and a blow-off type are used to blow off snow on roads and prevent the occurrence of visibility problems due to snow on the side edges of roads and tracks in snowy areas. As such a snow fence, for example, posts are erected at predetermined intervals along the windward side edge of the road, and a plurality of wing-type snow plates are vertically spaced between the posts. Open and incline so that the wind blowing side becomes higher, and make the wing-type snow protection board cross-sectional shape so that the lower side is convex so that the snow blowing effect can be obtained far away In addition, a technology is known that prevents the visibility of the driver from being disturbed and prevents the snowboard from blowing off. (For example, refer to Patent Document 1.)
Also, to prevent the snowstorm catching function from deteriorating even if the height of the snow hill formed on the windward side of the windbreak fence that captures the snowstorm approaches the height of the fence, the windbreak fence is arranged vertically and the arc wing guide plate part. In the vertical part, the snowstorm blows and accumulates in the vertical part, and the snowstorm flow that crosses the fence in the arc wing-type guide plate part moves to a high position in the road space to the leeward side of the road A technique that blows away is also known. (For example, see Patent Document 2.)
On the other hand, as a technology to prevent safe driving from being obstructed by strong crosswinds on roads and tracks, a technology is also known that installs a windmill on the side of the road and reduces the crosswind on the road surface downstream of the windmill. It has been. (For example, see Patent Document 3.)

JP 2003-138525 A JP 2001-288715 A JP 2003-232012 A

  However, in the case of the snow fences and blown fences of Patent Document 1 and Patent Document 2, since the driver's field of view is always limited, it is easy to give the driver a feeling of pressure and blockage. In this case, since the windmill type is a horizontal axis type, there is a problem that the propeller is broken or easily damaged in a strong wind or the like, and is not suitable for installation in an area where frequent snowstorms occur.

  Accordingly, the present invention can alleviate visibility disturbances caused by snowstorms, etc. even when strong winds blow, and also prevents a feeling of pressure or obstruction due to completely closing the side field of view. And

In order to achieve the above object, according to the present invention, a snow accumulation prevention plate is disposed along a shoulder on the main wind direction side of a road or a track, and a plurality of vertical axis type wind turbines are arranged in a row above the snow accumulation prevention plate. While arrange | positioning side by side, the space | interval of an adjacent windmill was made into the space | interval within the blade diameter of a windmill, and the separator member was arrange | positioned between the said windmill and a windmill .

And by installing a snow prevention plate along the shoulder on the main wind direction side of the road or track, and arranging the vertical axis type wind turbines in a line on the top, the wind speed on the downstream side of the wind turbines is decelerated. The disturbance of visibility caused by snowstorm on the road is agitated by stirring the air flow. In this case, the turbulence of the air downstream of the vertical axis type wind turbine is generally the diameter of the rotating blade. It is an area up to the same width interval as For this reason, if the interval between the adjacent windmills is set to be within the width of the windmill, general wind does not enter between the windmills and the windmill, and visibility hindrance can be alleviated over the entire road.
Moreover, the snow accumulation prevention plate below the windmill prevents the snowstorm from blowing from the slope on the side of the road and the like, and the snow accumulation on the road is prevented. As this snow accumulation prevention plate, for example, a metal plate or a resin plate Etc. can be used.
On the snow accumulation prevention plate, a gap is formed between the windmills and the outside scenery can be seen with the rotation of the blades of the windmills.
Also, by using a vertical axis type windmill, the stronger the wind, the higher the rotational speed, and it is possible to generate stronger turbulence, and the durability against wind is increased compared to the horizontal axis type. be able to.

Further, between the wind turbine and wind turbine, by disposing the separator member, your interference winds between one another of the wind turbine can be avoided, also no longer interfere with any direction of rotation of the windmill in the same, advantageous is there.
On the other hand, when there is no separator member, if all the rotation directions of the windmills are the same direction, the wind between adjacent windmills interferes with each other and the stirring effect is reduced, and the visibility hindrance mitigating effect is reduced. It is necessary to take measures such as changing the direction of the blades of the windmill.

In the present invention, a generator is started by the windmill, and the generated power is used for gaze guidance or snow melting.
In this way, if power is generated by the windmill and the power generation is used, the wind can be effectively used and safer traveling can be achieved.

By installing a snow prevention plate along the shoulder of the main wind direction side of the road or track, and arranging vertical axis type wind turbines in a row at an interval within the width of the wind turbine on the top of this snow prevention plate It is possible to alleviate the visibility hindrance due to the snowstorm on the road by stirring the air flow on the leeward side, and open the side view of the road to increase the feeling of opening.
If a separator member is disposed between the windmills, there is no problem even if the rotation directions of the windmills are all the same, and the generator is started by the windmills, and the power generation is used for gaze guidance or snow melting. By doing so, the wind can be effectively used, which is preferable.

Embodiments of the present invention will be described with reference to the accompanying drawings.
Here, FIG. 1 is a schematic diagram of installation of the visibility disorder alleviating device according to the present invention, FIG. 2 is a front view showing the main part of the basic structure of the visibility impairment mitigating device, FIG. 3 is a plan view thereof, and FIG. FIG. 5 is a plan view of an example in which a separator member is disposed between wind turbines.

  The visibility disturbance alleviating device according to the present invention reduces the visibility obstacle caused by a snowstorm even when a strong wind blows, for example, while driving on a road on a road, and closes the field of view on the side of the road, It is designed not to give a feeling of obstruction. At this time, the visibility deterioration phenomenon due to snowstorms may include a case where visibility falls due to strong winds during snowfall, a case where the snow piled up on the road rises due to strong winds, and visibility is disturbed, etc. Here, all of these are referred to as snowstorms.

Visibility disturbances due to snowstorms are affected by snowfall conditions, wind speed, temperature, etc., but are largely dominated by wind speed, and the amount of snow carried by snowstorms is said to be approximately proportional to the cube of wind speed. Now, for example, in a snowstorm with a wind speed of 12 m / s, the visibility is about 28 m, the visibility is about 40 m when the wind speed is 10 m / s, the visibility is about 75 m when the wind speed is 8 m / s, and the visibility is about 130 m when the wind speed is 6 m / s. ing.
On the other hand, in general, when the visibility is 30 m or less, the vehicle cannot travel, and at 30 to 50 m, some vehicles stop due to poor visibility, and at 50 to 100 m, depending on the visibility inducer, constant speed traveling is possible. There is also data that it is possible, and when the visibility is actually 50 m or less, the road is often closed.

  Therefore, in the visibility disorder alleviating apparatus 1 according to the present invention, road traffic is not hindered even when the requirement that visibility is disturbed by a snowstorm is satisfied, as shown in FIGS. 1 to 3. Further, a metal support 2 standing at predetermined intervals along the shoulder on the main wind direction side of the road, a snow accumulation prevention plate 3 fixed to the lower part of each support 2, and an upper portion of the snow accumulation prevention plate 3 Is provided with a vertical axis wind turbine 5 attached via a wind turbine frame 4 so that the wind speed downstream from the wind turbine 5 is weakened, and at the same time, the flow is disturbed to reduce visibility on the road.

Here, horizontal axis type wind turbines and vertical axis type wind turbines are known as wind turbines, both of which reduce the wind speed in the wake of the wind turbine, but horizontal axis type wind turbines are prone to damage propellers etc. in strong winds Many are not suitable for snowstorm countermeasures.
On the other hand, a vertical axis type windmill rotates stably even in a strong wind, and the stronger the wind, the higher the rotational speed, which is effective in decelerating the wind speed of the wake. Suitable for obstacle mitigation.
Here, the specific type of the vertical axis wind turbine is arbitrary, and for example, a Savonius type or a cross flow type can be applied. In this embodiment, a Savonius type wind turbine is adopted.

  In the present embodiment, the snow accumulation preventing plate 3 is a non-porous metal plate, for example, a plate bent in a zigzag shape for strength reinforcement and fixed to the lower portion of the metal support 2 with bolts or the like. A function to prevent snow from being blown from the slope of the other side and to accumulate on the road, and when the snow on the road is scraped, it prevents the scraped snow from falling to the side of the road. It has a function. Of course, the material, shape, and the like of the snow accumulation preventing plate 3 are arbitrary, and may be made of resin or the like, and may have a flat surface without bending.

  The windmill frame 4 is disposed between the support columns 2 on the upper part of the snow accumulation preventing plate 3 and rotatably supports the upper and lower shafts of the plurality of windmills 5.

The windmills 5 are arranged in a line along the longitudinal direction inside the windmill frame 4, and the interval x between the adjacent windmills 5 is set within the diameter a (FIG. 3) of the blades of the windmill 5. .
This is because the turbulence of the air downstream of the vertical axis type wind turbine 5 is generally in a region up to a width interval similar to the diameter of the rotating blades. This is because, when the distance is within the blade diameter a, visibility hindrance can be alleviated over the entire road.
Further, by setting a predetermined interval x between the windmills 5, the driver can visually recognize the scenery on the side of the road, and can feel a sense of openness without feeling pressure or blockage.

  In the present embodiment, the height of the wind turbine 5 is set to 2.0 to 3.0 m. In the case of the vertical axis windmill 5, as will be described later, the wind-winding effect is exerted on the downstream side of the windmill 5 due to the rotational force of the windmill 5, and the height is 2/3 compared to the conventional snow fence. This is because the wind speed in the entire lane of the road can be reduced even if the pressure is kept low. Incidentally, in the case of a conventional snow fence, the height is about 3 m on a two-lane road (width of about 10 m), and the height is about 4 m on a four-lane road.

The operation of the visibility disorder alleviating device 1 as described above will be described with reference to FIG.
When the wind speed increases and the visibility failure condition due to snowstorm is satisfied, the vertical axis windmill 5 rotates at a speed proportional to the wind speed, and the wind on the leeward side of the windmill 5 takes energy to reduce the wind speed. As the wind speed increases, the wind speed increases as the wind speed increases. As a result of the wind tunnel experiment using the cross-flow type wind turbine, the windward side reaches a distance of about four times the height of the windmill 5 from the windmill 5 toward the leeward side. The wind speed can be decelerated to 40 or less with respect to the wind speed of 100, and since it flows along the flow in the general flow thereafter, a weak wind region is formed to a distance of about 8 to 10 times the height of the wind turbine 5. It has been confirmed that
Further, even in the test example in which the vertical axis wind turbines 5 are installed side by side on an actual road, two or more road lanes or more are required on the leeward side of the wind turbine 5 with respect to a snowstorm of 12 m / s on the windward side of the wind turbine 5 (approximately 28 m visibility) Visibility of 80m or more is secured.

For this reason, the visibility disorder | damage | failure by a snowstorm is eased with the reduction | decrease of a wind speed, the forward visibility of a running vehicle is improved significantly, and an appearance improves. This improvement in visibility is extremely effective in alleviating the visibility failure of snowstorms because the rotational speed of the vertical axis wind turbine 5 increases as the wind speed increases.
Also, in the height direction, when the wind turbine 5 is used, the wake rises so as to wind up, so that the maximum height of the weak wind region is expanded to about 1.5 times the height of the wind turbine 5. It has also been confirmed. On the other hand, in the case of the conventional snow fence 51, as shown in FIG. 4B, the maximum height of the weak wind region is substantially the same as the height of the snow fence 51.
An example of such a conventional snow fence 51 is a snow prevention plate 52 disposed along the road shoulder on the main wind direction side, and a perforated folded plate attached to the top of the snow prevention plate 52. 53. The perforated folded plate 53 has a number of punch holes, and is bent in a zigzag manner along a horizontal fold line for strength reinforcement.

  Further, when the windmill 5 is used, since the windmill 5 is a rotating body, the required strength value of the column 2 and the like with respect to the wind may be smaller than the required strength value of the fixed column of the conventional snow fence 51. Moreover, since the same effect can be obtained with the height of the column 2 and the like at about 2/3 as compared with the conventional snow fence 51 as described above, the installation cost can be reduced as compared with the conventional case.

Moreover, since the windmill 5 is a vertical axis type windmill, even if a strong wind blows, it is hard to damage, and durability is high compared with a horizontal axis type windmill.
Further, as described above, the driver can visually recognize the scenery on the side of the road, and can prevent a feeling of pressure or a blockage and obtain a feeling of opening.

By the way, as shown in FIG. 5, you may make it arrange | position the separator member 6 between the adjacent windmills 5. As shown in FIG. The separator member 6 is disposed so that the influence of the wind caused by the rotation of the adjacent windmill 5 does not affect the adjacent windmill 5, and such a separator member 6 is disposed. Thus, even if the rotational directions of the windmills 5 are all the same, there is no problem that the winds between the windmills 5 interfere with each other, and the effect of stirring the airflow over the entire road without changing the direction of the blades of the windmills 5 Can be increased.
Incidentally, the depth length of the separator member 6 (the length in the direction perpendicular to the line connecting the windmill 5 and the windmill 5) is preferably within the diameter of the blade of the windmill 5 + diameter × 20%.

  It is also possible to attach a generator to these wind turbines 5 and use the obtained power generation for visual line guidance and snow melting. If the power generation of the windmill 5 is used in this way, safer vehicle operation can be achieved with environmentally friendly energy.

In addition, this invention is not limited to the above embodiments. What has substantially the same configuration as the matters described in the claims of the present invention and exhibits the same operational effects belongs to the technical scope of the present invention.
For example, the vertical axis type windmill is not limited to the Savonius type, and the visibility obstruction mitigation device can be applied to a track such as a railway in addition to a road.

  By disposing the vertical axis windmill on the upper part of the snow accumulation prevention plate disposed on the shoulder on the main wind direction side of the road, the visibility of the road is reduced and smooth traffic and safe driving are achieved. Further, there is no problem that gives the driver a feeling of pressure or a blockage.

Overview of installation of the visibility disorder alleviating device according to the present invention Front view showing the main part of the basic structure of the visibility disorder alleviating device Plan view It is an action figure which shows the operation of this visibility disorder alleviating device compared with the past, (a) is the case of the present invention, (b) is a conventional example. The top view of the example which has arrange | positioned the separator member between windmills

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Visibility disorder | damage mitigation apparatus, 3 ... Snow accumulation prevention board, 5 ... Vertical axis windmill, 6 ... Separator member, a ... Blade diameter, x ... Windmill space | interval.

Claims (2)

A snow prevention plate is installed along the shoulder on the main wind direction side of the road or track, and a plurality of vertical axis type wind turbines are arranged in a row above this snow prevention plate, and the distance between adjacent wind turbines Is a gap within the blade diameter of the wind turbine, and a separator member is provided between the wind turbine and the wind turbine . 2. The visibility disorder alleviating device according to claim 1 , wherein a power generator is activated by the windmill and the power generation is used for gaze guidance or snow melting.

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