JP5822193B2 - Snowfall prevention device - Google Patents

Description

  The present invention relates to a snow ridge that occurs on an upper edge portion of a parapet in a building, an upper edge portion of a coping, a protective wall in an elevated railway or an elevated road, or an upper edge portion of a structure such as a work (an advertising tower, a signboard, etc.). The present invention relates to a device for preventing the occurrence of snowfall.

  Conventionally, it has been easy for snow ridges to occur at the upper edge of buildings and structures as described above during snowfall. That is, for example, at the upper edge of a building (for example, a parapet), the snow that has been carried along with the wind blowing along the roof surface returns to a vortex when it blows over the parapet headboard, and the wall surface is caused by its stickiness. It grows and develops toward the leeward while adhering to the snow, and becomes a snow leopard. As described above, the generated snow sag is generated only during the snowstorm, and if the snow sag increases, there is a risk of causing a danger to a passerby or the like by dropping under the eaves or the like.

  In addition, when a snow leopard occurs on the upper edge of the protective wall, there are similar concerns, and if it falls into or out of an elevated railroad or elevated road, there are problems such as traffic obstruction.

  Therefore, as shown in Patent Document 1, a triangular blow-up having an inclined surface whose cross section is inclined downward from the outside to the inside of the structure at a position immediately above the upper edge portion of the building or structure. The structure which forms a part is proposed. According to this, since the wind blowing from the inside to the outside of the structure is guided upward along the inclined surface, the wind speed is accelerated on the upper edge portion of the structure, and the structure Wind vortices generated when moving away from an object occur at a position away from the structure. Therefore, it is possible to effectively prevent the occurrence of a snow leopard.

  However, since the snow squib generation preventing device shown in Patent Document 1 is relatively small, there is a problem that a snow skein is generated when there is snowfall that exceeds the blowing capacity in an area with a large amount of snow. In order to cope with this, it is necessary to increase the height of the snowfall prevention member.

  Therefore, in order to cope with the above problem, a multi-stage louver-type apparatus for preventing occurrence of a snow ridge that has multiple louver panels inclined upward and outward is considered (see Patent Document 2). According to this, since the inclined louver panels are provided in multiple stages, the bottom area does not increase even if the height is increased in order to improve the blowing effect, so that the installation area can be small. For this reason, there is no restriction on the installation location.

Japanese Patent No. 2882888 Japanese Patent No. 4164405

  However, the apparatus of Patent Document 2 has a problem in that the gap between the louver panel and the louver panel installed in multiple stages at intervals is exposed to the outside, the back side of the louver panel can be seen, and the appearance is impaired.

  It is an object of the present invention to solve the above-mentioned problems and to provide an apparatus for preventing the occurrence of snow ridges that can save installation space, is less affected by wind, and does not impair the appearance.

  In order to solve the first problem, according to a first aspect of the present invention, a plurality of louver panels inclined outward and upward are installed in a step shape on an upper edge portion of a building or a structure, and the plurality of louver panels are provided. A vertical snow-cut plate is formed at the outer upper end of each of the above, and a large number of through holes are formed through the snow-cut plate.

According to a second aspect of the present invention, in the first and second louver panels installed in a step shape in the first aspect , the lower end of the upper louver panel is higher than the upper end of the lower louver panel one level lower than the upper louver panel. It is formed.

According to a third aspect of the present invention, in the first or second aspect , the stepped louver panel, the snow cut plate attached to the outer upper end of the louver panel, and the side plate that fixes both ends of the louver panel are unitized. It is characterized by.

  According to the invention according to claim 1, since the plurality of louver panels inclined outward and upward are installed in a step shape on the upper edge portion of the building or structure, the louver panel is formed from the inside of the building or structure. It is inclined to become higher toward the outside. For this reason, the wind speed of the wind blowing toward the outside from the inside of the building or structure is accelerated while moving along the inclined surface of the louver panel, and is guided upward and blown up. For this reason, the vortex of the wind which arises when it leaves | separates from a building generate | occur | produces in the position away from the building to the outdoor side. In this way, snow on the upper edge of the building is blown off by the inclined surface of the louver panel, and wind vortices that generate snow are also generated away from the upper edge. Can be effectively prevented.

  Also, if there is no wind and snow falls, snow may accumulate on the top of the top louver panel, but when the snow settles down, it will be removed by the top snow plate, Never become.

  In addition, since the uppermost snow-cutting plate has a through hole, the coefficient of friction between the snow-cutting plate and the snow is low, and snow is easily cut off.

  Furthermore, although the gap between the upper and lower louver panels is reduced by the snow cutting plate, a large number of through holes 12 are formed in the snow cutting plate, and these become air passage holes passing between the upper and lower louver panels. Therefore, since the snow blowing effect by the inclined surface of the louver panel is not hindered, the snow cut plate does not hinder the prevention of the occurrence of the snow leopard. In addition, as the height of the device increases, the wind pressure applied to the device increases, and in particular, the snow-cut plates formed in multiple stages have a large area to which the wind pressure is applied. However, a large number of through-holes are formed in the snow-cut plate, the wind is good, and the influence of wind pressure is reduced.

  Moreover, since the snow-cutting board 9 is vertically formed in the upper end part on the outer side of each louver panel 8, only the snow-cutting board 9 appears directly on the upper edge portion 2 of the building from the outside. As a result, the appearance of the back of the louver panel is not impaired by the visibility of the back side of the louver panel.

Moreover , since the said many through-hole can be formed by punching process, manufacture of many louver panels with a through-hole can be performed easily.

According to the invention of claim 2 , since the lower end of the upper louver panel is formed higher than the upper end of the lower louver panel lower than that, the upper and lower louver panels are moved up and down by the days when snow falls without wind. Even if snow is accumulated between the louver panels 8, the height of the snow is higher than that of the lower louver panel. The raised portion faces the snow cut plate 9 of the lower louver panel 8, but the sunlight that has passed through the through holes 12 of the snow cut plate 9 is warmed against the snow surface, and the melting of the snow proceeds and wind pressure Since it is pushed out to the outdoor side, it goes out from the through-hole 12 and falls down. Therefore, the snow is not clogged between the upper and lower louvers, and the effect of preventing the occurrence of snowfall is not impaired.

According to the invention of claim 3 , since the left and right side plates, the louver panel, and the snow cutting plate are unitized in advance, it can be easily and quickly constructed on the upper edge portion of the building or structure, and can be carried in. Troubles such as parts being lost at the time of construction or construction can be avoided.

The perspective view which shows the assembly and decomposition | disassembly state of the snow candy generation | occurrence | production prevention apparatus based on this invention Exploded perspective view of the snowfall prevention unit Longitudinal sectional view of the device for preventing snowfall Cross-sectional view showing the assembly mode of the snow leopard prevention unit Explanatory drawing of the prevention of the occurrence of snowfall by the snowfall prevention device Explanatory drawing showing excision of snow ridge by consolidation sedimentation Explanatory drawing which shows the snow melting state between the upper and lower louver panels of snow

  In FIG. 1, reference symbol A is a snowfall prevention device. This apparatus for preventing the occurrence of a snowfall is provided with a snowfall prevention unit a between a plurality of support columns 3 installed vertically on an upper edge portion (or an upper edge portion of a structure) 2 of a parapet 1 of a building. The column 3 is configured by fitting a column main body 5 from an aluminum extrusion mold material to the outside of a rectangular tube-shaped column support member 4 fixed to the upper edge portion 2 and fixing it with bolts. 3a is a cap.

  The column support member 4 is provided with a relatively short column part 7 at the center upper portion of the plate-like body 6, and the column body 5 is fitted to the column unit 7.

  Next, as shown in FIG. 2, the snowfall prevention unit a fixes a plurality of louver panels 8 that are inclined outward and upward between the left and right side plates 7, and the outer upper end of each louver panel 8. A vertical snow-cutting plate 9 is formed at the part, and bent pieces 8a and 8b are formed at the upper and lower ends of the louver panel 8 in opposite directions. As shown in FIG. A screw hole 10 is formed in the vicinity of the connecting portion between the bent pieces 8a and 8b. Each louver panel 8 is fixed by abutting both ends against the side plate 7 and screwing screws 11 inserted from the outside of the side plate 7 into the screw holes 10.

  In the upper and lower louver panels 8, 8 installed in a step shape, the lower end of the upper louver panel 8 is positioned so as to be higher than the upper end of the lower louver panel 8 one level below. .

  Next, a large number of through holes 12 are formed in the snow-cut plate 9, but these through holes 12 may be formed by punching. Other perforation means may be used. The sizes of the through holes 12 do not have to be constant, and those having different sizes may be mixed. Further, the interval between the through holes is not limited to this embodiment.

  As shown in FIG. 3, a bolt head fitting groove 13 is formed along the longitudinal direction on the inner side of the lower end of the snow-cutting plate 9. The snow-cutting plate 9 slides and fits the head of the bolt 14 into the fitting groove 13, and the bolt 14 is inserted into a bolt hole 8 c provided in the bent piece 8 a at the upper end of the louver panel 8 fixed to the side plate 7. It is inserted and fixed with a nut 15. Further, both end portions of the louver panel 8 and the snow cutting plate 9 are in contact with a reinforcing piece 7 a (see FIG. 1) bent and formed on the outdoor side of the side plate 7.

  The lower end of each snow-cutting plate 9 is substantially the same because it overlaps with the upper end of the louver panel 8 of the stage to which it is attached, but the upper end 16 of each snow-cutting plate 9 is higher than the lower end 17 of the upper-stage louver panel 8. So that the arrangement is fixed.

  Note that the louver panel and the snow-cut plate may be formed from an integral plate-like body, and a through hole may be formed at a portion corresponding to the snow-cut plate.

  Further, the uppermost snow-cutting plate 9 may be a plate-like body not provided with a through hole, as in the conventional one.

  The inclined surface of the louver panel 8 accelerates the wind speed by guiding the wind blowing from the inside to the outside of the building as shown by the arrow in FIG. 5, and is separated from the building to the outdoor side. The vortex of the wind that is sometimes generated is for separating from the wall surface of the building, and is formed at a predetermined angle. According to the experiment, the inclination angle of the louver panel 8 with respect to the horizontal plane has been found that the vortex generated in the leeward from about θ = 55 ° is separated from the wall surface of the structure. Therefore, θ ≧ 50 ° may be satisfied.

  Note that the number of stages where the louver panel is provided is not particularly limited. It may be determined according to the strength of the wind and the amount of snowfall.

  When attaching the snowfall prevention unit a to the support column 3, as shown in FIG. 4, the snowfall prevention unit a is arranged on both sides of the support column 3, and penetrates from the side plate 7 of the one snowfall generation prevention unit a to the support column 3. What is necessary is just to let the volt | bolt 17 made to penetrate the side plate 7 of the other snow jar generation | occurrence | production prevention unit a further, and to fix with the nut 18. FIG.

  Next, the operation of the snow ridge occurrence preventing apparatus having the above configuration will be described.

  As described above, since the plurality of louver panels 8 that are inclined outward and upward are installed in a step shape on the upper edge portion 2 of the building or structure, the louver panel 8 extends from the inside to the outside of the building or structure. It is inclined so as to become higher. Therefore, as shown in FIG. 5, the wind speed of the wind blowing from the inside to the outside of the building or structure is accelerated while moving along the inclined surface of the louver panel 8 and guided upward. Be blown up. For this reason, the vortex of the wind which arises when it leaves | separates from a building generate | occur | produces in the position away from the building to the outdoor side. In this way, the snow on the upper edge portion 2 of the building is blown off by the inclined surface of the louver panel 8, and the wind vortex that generates a snow leopard is also generated at a position away from the upper edge portion 2, It is possible to effectively prevent the occurrence of snow leopards.

  In addition, if there is no wind and snow falls for a long time, snow may accumulate on the upper part of the uppermost louver panel 8, but as shown in FIG. Since it is excised by 9, it does not become a big snow jar. Moreover, since the uppermost snow-cutting plate is formed with a through hole, the coefficient of friction between the snow-cutting plate and the snow is lowered, and snow is easily cut off.

  Furthermore, although the gap between the upper and lower louver panels 8 is reduced by the snow cutting plate 9, a large number of through holes 12 are formed in the snow cutting plate 9, and these wind passages pass between the upper and lower louver panels 8. Since it becomes a through hole, the snow blowing effect by the inclined surface of the louver panel 8 is not hindered. In addition, as the height of the device increases, the wind pressure applied to the device increases, and in particular, the snow cut plate 9 formed in multiple stages has a large area to which the wind pressure is applied. However, a large number of through holes 12 are formed in the snow-cut plate 9, and the wind is good, and the influence of wind pressure is reduced.

  Moreover, since the snow-cutting board 9 is vertically formed in the upper end part on the outer side of each louver panel 8, only the snow-cutting board 9 appears directly on the upper edge portion 2 of the building from the outside. As a result, the appearance of the back of the louver panel is not impaired by the visibility of the back side of the louver panel.

  Since the many through holes 12 of the louver panel 8 can be formed by punching, the louver panel 8 with many through holes can be easily manufactured.

  Furthermore, since the lower end of the upper louver panel 8 is formed higher than the upper end of the lower louver panel 8 lower than the upper louver panel 8, the upper and lower louver panels 8 are not affected by the day when snow falls even though there is no wind. Even if there is snow in between, the height of the snow is higher than that of the lower louver panel 8. The raised part faces the snow cut plate 9 of the lower louver panel 8, but as shown in FIG. 7, the sunlight that has passed through the through holes 12 of the snow cut plate 9 is warmed against the snow surface, As the snow melting progresses, it goes out of the through hole 12 and drips down. Therefore, the snow is not clogged between the upper and lower louvers, and the effect of preventing the occurrence of snowfall is not impaired.

  Further, the left and right side plates 7, the louver panel 8, and the snow cutting plate 9 are unitized in advance as the snow scum occurrence prevention unit a, and therefore, when they are attached to the column 3, they may be fixed with bolts 17 and nuts 18. It can be easily and quickly constructed, and troubles such as parts being lost at the time of carrying in or construction can be avoided.

  Note that the number and size of light transmission may be formed in consideration of such a case.

A Snowfall generation prevention device a Snowfall generation prevention unit 2 Upper edge portion 3 Support column 8 Louver panel 9 Snow cutting plate 12 Through hole

Claims (3)

  A plurality of louver panels inclined outward and upward are installed in a step shape on the upper edge portion of the building or structure, and a vertical snow-cutting plate is formed on the outer upper end of each of the plurality of louver panels. A device for preventing the occurrence of snow scum, characterized in that a large number of through holes are formed in the snow cutting plate. In the installed above the lower louver panel stepped lower end of the upper louver panel is characterized in that it is higher than the upper end of the lower louver panel under stage than, claim 1 A device for preventing the occurrence of snowfall as described in 1. Characterized in that it is unitized and the stepped louver panel and both ends fixed to the side plate of the louver panel outer upper end snow switching plate and the louver panels attached to the, according to claim 1 or 2 Equipment for preventing snowfall from falling.

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