JP3095635U - Blown snow fence - Google Patents

Abstract

(57) [Summary] [Problem] To squeeze the wind passing between a plurality of snow shields of a blow-off snow fence smoothly to the lower part without loss, and to smooth the flow of wind on the road surface by the cross wind blowing below the lowermost snow shield. To lead to SOLUTION: A wind blowing on a fence to which a plurality of snow plates 1 to 4 are attached is guided to a lower portion by the snow plates, and a lower gap 6 is formed.
Road 5
In the snow blow-off fence that blows off the snow, the snow shields 1 to 4 are formed in a flat plate shape, and the installation position is viewed from the vertical and horizontal direction as going from the uppermost snow shield 1 to the lowermost snow shield 4. , Road 5 along a curved curve that is concave outward.
Sideways, and usually each of four snowproof boards 1-4
Is also set such that an angle (inclination angle) between the uppermost part 1 and the lowermost part 4 with respect to the vertical is gradually increased.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention uses a wind blown on a fence equipped with a plurality (usually four) of snow-preventing plates to the snow-preventing plates. It leads to the lower part, merges with the strong crosswind that blows through the void in the lower part, accelerates it, and The present invention relates to a blow-off type snow fence that blows off snow on the surface.

[0002]

[Prior art]

  The first developed blow-off fence is a temporary type, and the fence pillar is divided into a main pillar and a retaining pillar. , Therefore, the installation position of the main pillar is on the road shoulder, and the installation of the retaining pillar is on the agricultural land beyond the drainage canal. In most cases, it is the installation position. (For example, see Japanese Utility Model Publication No. 54-36506. See).   In addition, a plurality of wing-type snow protection plates are placed vertically between the columns that stand upright along the windward side edge of the road. This airfoil is installed with a space in between and tilted so that the blowing side becomes higher. There are some snow protection plates whose cross-sectional shape is convex downward. (For example, Japanese Patent Laid-Open No. 2002-2002 (See Japanese Patent No. 138417)

[0003]

[Problems to be solved by the device]

  In Japanese Utility Model Publication No. 54-36506, as described above, the installation position of the main pillar is the road shoulder. Since most of the cases where the post is installed in the agricultural land beyond the drainage channel, the land is acquired. Alternatively, borrowing is required and it is avoided from the viewpoint of cost, procedure, etc. Has never been adopted by.   Further, in the one disclosed in JP-A-2002-138417, the main pillar and the stay pillar are combined. The straight pillar enables the installation on the road site, and the problem of land acquisition and borrowing is solved. It has been resolved, and the wing-shaped snow fence with the wind due to the lift force of the wing-shaped in the direction opposite to the wind direction. There is no fear that the snow will be blown away, but a processing step to form the snow plate into a wing shape is required. It was   In the present invention, the snow plaque is simply a flat plate, and many wind tunnel experiments are repeated. The challenge is to provide snow fences with a higher blowing performance.

[0004]

[Means for Solving the Problems]

  Means adopted by the present invention to solve the above problems are   The snow blower guides the wind that blows to the fence with multiple snow protectors to the bottom, Combine with a strong crosswind that blows through the gaps in the section to accelerate and blow off the snow on the road surface In a blow-off type snow fence, the above-mentioned snow plate should be flat and its installation position should be As it goes from the upper snow plate to the lower snow plate, it is concave outward as seen from the vertical lateral direction. It is arranged on the road side along a curved curve in the order of 1, and usually four snow protection The mounting angle of the plate also makes an angle with the vertical direction from the top to the bottom (tilt The feature is that the corners are set larger one after another.   In addition, in order to solve another problem, in addition to the means of claim 1, the uppermost snow protection plate has The feature is that a perforated plate is adopted.   Furthermore, in order to solve another problem, the above-mentioned method is added to the means of claim 1 or 2. Each of the snow protection plates from the upper part to the lowermost part is installed in a vertical main direction along the windward side edge of the road. From the top of the pillar, it is attached to a curved column that is curved upward in a concave shape, The lower ends of the curved columns that are curved in a vertical direction are spaced apart on the leeward side of the vertical main column. Is installed parallel to the vertical direction, and can be attached to a short column that is high enough to blow a strong crosswind. It is characterized by being held.

[0005]

[Embodiment of device]

  Next, an embodiment of the present invention will be described with reference to an example described in the drawings.   FIG. 1 is a side view of the blow-off snow protection fence of the present invention seen from a vertical lateral direction, and FIG. It is a perspective view.   In the figure, the uppermost snow protection plate of the four snow protection plates is set to 1 and As shown, the snow plate 2, the snow plate 3, and the bottom snow plate 4 are located outside (upper). Direction) along the curved curve that is concavely curved toward the road 5 side, and Follow the installation angle of each snow plaque 1 to 4 from the top snow plaque 1 to the bottom plaque 4. The angle (tilt angle) formed with the vertical direction is gradually increased.   The four snow plates formed as described above have a streamlined shape as a whole. Can be seen.   It should be noted that the wind that overflowed from the top of the fence on the top of the snow-preventing plate 1 was swirled to the lee of the fence. A perforated plate is used to alleviate the occurrence of blindness.

[0006]   In addition, each of the above-mentioned snow plates 1 to 4 from the uppermost part to the lowermost part is located on the windward side edge of the road 5. A curved shape that is concavely curved upward from the top portion 7a of the main pillar 7 in the vertical direction that is erected along Of the curved pillar 8 attached to the pillar 8 of FIG. 2 (see FIG. 2) and curved upward in the concave shape. A lower end 8a of the vertical main pillar 7 is vertically parallel to the leeward side of the main pillar 7 in the vertical direction. A strong cross wind is attached to and supported by a short column 9 (Fig. 2) that is high enough to blow strong cross winds through the gap 6. ing.   Next, the operation will be explained. Assuming ゜, 20 ゜, 25 ゜ and 30 ゜, the wind blown from right to left in Fig. 1 is Increase the force to pass through the snow plates 1 to 4 with different inclination angles and narrow down below the fence. And blow it together with the strong cross wind that blows through the void 6 below the bottom snow plate 4. It has been confirmed as a result of the wind tunnel experiment that the wind speed to be paid is increased.   In the above wind tunnel experiment, the activity that is said to be the closest to the snow particles as model snow White clay was used.

[0007]   As described above, in FIG. 1, the wind blown from right to left has a lower inclination angle. Pass through between the snow plaques 1 to 4 that are enlarged toward you, and narrow down below the fence. As the force is increased, the main pillars 7, the pillars 8 and the back side of the snow plate in FIG. A space (broken line portion in FIG. 1) is formed. The larger this space, the stronger the wind Is provided with a force to attract the wind, and the stored wind force is strong enough to blow through the gap 6 below. Combined with the strong cross wind, the wind speed to be blown off is increased to obtain the desired wind force that can be blown off. Produces the effect   In the above-mentioned embodiment, the embodiment in which the number of snow plates is four has been described. This is the most frequently used example, and the number of snow plates is not limited to this.   Fig. 3 shows the wind flow by the model when the uppermost snow protection plate is a non-perforated plate. 4 shows the same wind flow when the uppermost snow-prevention plate is a perforated plate. It

[0008]

[Effect of device]

  As described above, according to the present invention, it is possible to spray onto a fence equipped with a plurality of snow protection plates. The snow breeze guides the wind to the lower part, and joins with the strong side wind that blows through the gap in the lower part. And blow it off to blow off the snow on the road surface. It should be a flat plate, and its installation position goes from the top snow plate to the bottom snow plate. As seen from the vertical and lateral direction, follow the curved curve that is concave outward, and gradually move toward the road side. And the installation angle of each of the four snow plates is usually from the top to the bottom. The feature is that the angle (tilt angle) formed with the vertical direction is gradually increased as it goes. By doing so, the following effects are achieved.

[0009]   (i) Each snow plate installed as described above blows from the windward sideways to the snow plate. The attached wind can be efficiently narrowed to the lower part, and it can be formed under the bottom snow plate. The lateral wind that blows through the created void makes the wind flow smoothly on the road surface. I can guide you.   (ii) As a result, as shown in Fig. 3, the distance over which the road surface is completely blown away is almost 7m, about 10m to the fact that the roadbed shows faces and blows off Compared to the conventional type with all the snow protection plates attached to the vertical columns at the same angle , About 1.5 times the blowing effect can be exhibited.   In addition, since the perforated plate is adopted as the uppermost snow-preventing plate as in claim 2, As shown in, the roadbed is completely blown up to about 8 m, and a part of the roadbed comes out. It is 14m to 15m to the place where the effect of blowout is recognized. Compared to the currently used conventional type, it is about 1.8 times to 2.0 times more effective As shown in Fig. 4, the eddy current is suppressed over a long range, and It can also exert a very excellent effect in alleviating obstacles.   Further, since it is configured as in claim 3, the blow-off type snow protection which is the object of the present invention The fence can be assembled easily and firmly.

[Brief description of drawings]

FIG. 1 is an explanatory side view showing the flow of wind in a blow-away snow protection fence of the present invention.

FIG. 2 is an assembled perspective view of the blow-off type snow fence of the present invention.

FIG. 3 is an explanatory side view showing the flow of wind when the uppermost snow-preventing plate of the blow-off type snow fence of the present invention is a non-perforated plate.

FIG. 4 is likewise an explanatory side view showing the flow of wind when the uppermost snow-prevention plate is a perforated plate.

[Explanation of symbols]

1 Snow plate 2 snow plates 3 snow plates 4 snow plates 5 roads 6 Voids that allow lateral air flow 7 main pillars 7a Upper end of main pillar 8 curved columns 8a Lower end of column 9 short columns

Claims (3)

[Scope of utility model registration request] 1. A blow-off type snow-prevention device that guides wind blown to a fence equipped with a plurality of snow-prevention plates to the lower part by the snow-prevention plate, joins it with a strong crosswind that blows through a gap in the lower part, and accelerates it to blow off snow on the road surface. In the fence, the snow protection plate should be flat, and the installation position should be seen from the vertical lateral direction as going from the uppermost snow protection plate to the lowermost snow protection plate. Place it side by side,
In addition, the blow-off type snow fences are characterized in that the angle of each of the four snow plates, which are usually attached, is also set to increase gradually from the top to the bottom (inclination angle). 2. The blow-off snow-protection fence according to claim 1, wherein a perforated plate is used as the uppermost snow-prevention plate. 3. Each of the above-mentioned snow protection plates from the top to the bottom is a curved pillar that is curved upward in a concave shape from the top of a vertical main pillar that is erected along the windward side edge of the road. The lower ends of the curved struts that are attached and curved in a concave shape upward are provided parallel to each other in the vertical direction at a leeward side of the main pillar in the vertical direction, and are short struts with a height to blow a strong crosswind. The blow-off type snow fence as claimed in claim 1 or 2, wherein the blow-off snow fence is attached and supported.