JPH0418109B2 - - Google Patents

Description

Detailed Description of the Invention: a. Field of Industrial Application The present invention is applicable to the upper edge of a parapet in a building, the upper edge of a capstone, the upper edge of a protective wall on an elevated railway or elevated road, and the upper edge of a structure (advertisement tower). , signboards, etc.)
This invention relates to a device that prevents snow eaves from forming on the upper edges of trees.

b. Conventional technologies and their problems Conventionally, the upper edges of parapets of buildings in snowy regions, the upper edges of caps, the upper edges of protective walls on elevated railways and elevated roads, and structures (advertisement towers, signboards, etc.) have been used. ), snow eaves form on the leeward side of these upper edges due to the blowing wind, increase in size, and even fall.

The principle behind the formation of snow eaves is explained below.

As shown in Fig. 9, the snow eaves on the roof grow and develop as the flying snow carried by the wind 6 blowing on the roof surface sticks to the roof as it adheres to the roof when it blows over the hat trees. Therefore, snow eaves 6A can only be achieved by snowfall.
This is not a problem and only occurs during snowstorms. 6B indicates icicles.

For this reason, if snow eaves occur in a building, there is a risk that if the snow eaves develop and increase, they may fall under the eaves, causing harm to passersby.

Further, if a snow patch forms on the upper edge of the protective wall, there is a similar concern, and if it falls on or off an elevated railway or an elevated road, it may cause problems such as hindrance to traffic. B. Structure of the Invention a Means for Solving the Problems The present invention attempts to solve the above-mentioned problems with the following configuration. That is, the first aspect of the present invention is to provide a slit-shaped gap in the cross section directly above the upper edge portion 2 of a protective wall or structure (advertisement tower, signboard, signal, etc.) on an elevated railway or elevated road, with a slit-shaped gap D in between. A triangular blow-off section 3 is provided, and a vertical snow cutting board 3A is planted on the upper ridgeline of the blow-off section 3.
The second aspect of the present invention is a snow eave generation prevention device characterized in that the bottom surface of the blow-off blow-up section 3 is formed to have approximately the same size as the above-mentioned upper edge portion 2 facing the bottom surface. , parapets in buildings,
A blow-up portion 13 is provided continuously on the upper edge portion 2 of the outer edge of a structure such as a Kasagi, a protective wall on an elevated railway or an elevated road, or a structure (advertisement tower, signboard, signal, etc.). It consists of a blow-off blow-up section 14 having a triangular cross-section and provided directly above the blow-off section 13 with a slit-shaped gap section D in between.
The upper end surface of 3 is formed as an inclined surface 13A that slopes downward from the outside to the inside of the structure so as to guide the wind blowing from the inside to the outside of the structure to the intermediate part D, The outer surface 13B of the blow-up section 13 is formed on an extension of the outer surface of the upper edge portion 2, and the surface 14A of the blow-off section 14 facing the inside of the structure is , tilting upward and downward from the center toward the outside of the structure so as to guide the wind blowing from the inside of the structure to the outside to the upper part of the blow-off blow-up part 14 and the intermediate part D. Inclined surfaces 14B and 14C with horizontal V-shaped cross sections
This device is characterized in that the outer surface 14D of the blow-off section 14 is formed as an extension of the outer surface 13B of the blow-off section 13.

b Examples of the invention 1 is a snow eave generation prevention device of the first invention.

Reference numeral 11 denotes a snow eave generation prevention device of the second invention.

Reference numeral 2 denotes the upper edge portion of a parapet, the upper edge portion of a capstone, the upper edge portion of a protective wall on an elevated railway or elevated road, etc. in a building in which the snow eaves prevention device 1, 11 is to be installed.

The snow eave generation prevention device 1 of the first invention includes a slit-shaped gap D at a position directly above the upper edge portion 2 of a protective wall or structure (advertisement tower, signboard, signal, etc.) on an elevated railway or elevated road. A blow-off section 3 having a triangular cross section is provided, and a vertical snow cutting board 3A is installed on the upper ridgeline of the blow-off section 3. The bottom surface of the portion 3 is formed to have approximately the same size as the upper edge portion 2 that faces the bottom surface.

The inclined surface 3B of the blow-off blow-up section 3 is formed at a predetermined angle so as to guide the wind blowing as indicated by the arrow 5A.

Next, the snow eave generation prevention device as the second invention is as follows:
Parapets and caps for buildings, protective walls for elevated railways and elevated roads, and structures (advertisement towers, signboards, etc.)
A blow-up portion 13 is provided continuously on the upper edge portion 2 of the outer end of a structure such as a traffic light, etc., and a slit-shaped gap portion D is provided directly above the blow-up portion 13. A blow-off blow-up section 14 having a triangular cross-section
It consists of

The upper end surface of the blow-up section 13 has an inclined surface 13A that slopes downward from the outside to the inside of the structure so as to guide the wind blowing from the inside to the outside of the structure to the intermediate section D. and the outer surface 13B (seventh
(see figure) is formed on an extension of the outer surface of the upper edge portion 2.

The blow-up portion 13 may be constructed integrally with the upper edge portion 2 as shown in FIGS. 4 and 7, or may be constructed separately and attached to the upper portion of the upper edge portion 2.

The blow-off blow-up section 14 is a plate-shaped body having a predetermined width and a predetermined thickness and is supported in parallel with the blow-off section 13 via appropriate support legs 16.

Here, in the blow-off section 14, a surface facing the wind blowing as indicated by the arrow 15A, that is, a surface 14A facing the inside of the structure, blows away the wind blowing from the inside of the structure toward the outside. Part 14
An inclined surface 14 having a horizontal V-shaped cross section and slanting upward and downward from the center toward the outside of the structure so as to guide the upper part and the intermediate part D.
B, 14C, and the outer surface 14D of the blow-off section 14 is formed as an extension of the outer surface 13B of the blow-off section 13.

In addition, a wide range of materials can be used, including materials coated with fluororesin, ceramics, aluminum, stainless steel, colored steel plates, wood, and other materials to which snow does not adhere easily, and paints.

Note that the slit-shaped space D
For example, by configuring as described below, it is possible to freely adjust the expansion and contraction according to the state of the ground contact place.

That is, as shown in FIG. 5, the support legs 16 are made into upper and lower parts 16A and 16B, and adjustment holes 16A1 and 16B1 provided in both parts are connected to bolts 16D.
It is best to connect with The same applies to the example shown in FIG.

Note that the snow cutting board 14D on the upper ridgeline portion of the blow-off blow-up section 14 may be divided in the middle or may be attached over all sides. The snow cutting board 3A and the blow-off part 14 may be divided into predetermined intervals as shown in FIGS. 2 and 6.

In the figure, 5A and 15A indicate wind directions.

c Effect in case of the first invention Referring to Fig. 3, (a) The vortex generated in the leeward direction separates from the wall surface from about θ=45°.

Therefore, it is necessary to set θ≧45°.

(b) For those equipped with snow cutting boards, slope 3
Even if snow accumulates in B, the stickiness of the snow can be reduced and the snow can be dropped before the snow eaves grow.

(c) The dimension of the gap D is approximately 20% of the height 1L of the blow-off section 3 in order to keep the stickiness of the snow and the vortices generated in the leeward direction away from the wall surface.

In the case of the second invention, referring to FIG. 7, (a) the vortex generated in the leeward direction separates from the wall surface from about θ ₁ =θ ₂ =45°.

Therefore, θ ₁ and θ ₂ need to be 45° or more.

In addition, the direction of the wind passing through the gap must be horizontal or upward in order to keep the vortices generated in the leeward away from the wall surface. Therefore, θ ₁
≧θ ₂ .

(b) From θ ₃ = about 45°, the vortex that occurs downwind separates from the wall surface.

Therefore, it is necessary to satisfy θ ₃ ≧45°.

(c) The dimensions of the gap D should be approximately 20% of the wind guidance width 11L in order to keep the stickiness of the snow and the vortices generated in the leeward direction away from the wall surface.

C Effect of the invention a In the case of a snow cutting board, the slope 3
Even if snow accumulates in B, the stickiness of the snow can be reduced and the snow can be dropped before the snow canopy grows.

b If there is little snow on the roof, the above blow-up section 13
It is possible to prevent the formation of snow eaves simply by blowing away the snow.

c. If there is a lot of snow on the roof, a gap section D as a slit is provided directly above the blow-off section, and the blow-off section 14 is added to the snow blow-off section 14, so that the snow is gradually removed by the blow-off effect of both. In addition, it is possible to prevent snow eaves caused by accumulated snow up to the height of the blow-off part 14.

d When reducing the occurrence of snow eaves on existing buildings, elevated railways, and elevated roads, the above-mentioned blow-up section 13
It is effective by installing.

e By providing the above-mentioned blow-up section 13 and the above-mentioned blow-off blow-off section 14 together, it can be used as a protective fence and is also effective in terms of the external design of the building.

f A gap portion D as a slit is provided at a position directly above the blow-off portion 13, and the blow-off blow-up portion 14
By providing the above-mentioned space D, wind can be guided outside the roof surface and snow accumulation on the roof can be reduced.

g The blow-off fence 7 conventionally used for snow prevention measures on roads uses blow-off plates to guide wind onto the road, accelerate the wind speed on the road, and blow away the snow from the area 7A, as shown in Fig. 10. The purpose is to

On the contrary, in the present application, the blow-up portion 13,
The blow-off blow-up section 14 can increase the wind speed in the interval section D, thereby preventing the formation of snow overhangs. Therefore, the optimum angle of the blow-off board used for roads is different from the optimum angle of the present invention.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the first invention, Fig. 2 is a perspective view of another embodiment of the same as above, Fig. 3 is a side view for explaining the operation, Fig. 4 is a perspective view of the second invention, and Fig. 5. 6 is an exploded perspective view of the support leg, FIG. 6 is a perspective view of another embodiment, FIG. 7 is a side view illustrating the operation, FIG. 8 is a perspective view of another embodiment, and FIG. Explanatory diagram, No. 10
The figure is a side view illustrating the conventional operation. DESCRIPTION OF SYMBOLS 1... Snow eaves generation prevention device of the first invention, 2... Upper edge portion, 3... Blow-off blow-up section, 3A... Snow cutting board, 11... Snow eaves generation prevention device of the second invention, 13
...Blow-up part, 14...Blow-off blow-up part.

Claims (1)

[Claims] 1. A slit-shaped space with a triangular cross section separated by a slit-shaped space D at a position directly above the upper edge portion 2 of a protective wall or structure (advertisement tower, signboard, signal, etc.) in an elevated railway or elevated road. A vertical snow cutting board 3A is installed on the upper ridgeline of the snow blowing part 3, and a vertical snow cutting board 3A is installed on the bottom surface of the snow blowing part 3. is the upper edge portion 2 facing the bottom surface.
A snow eave generation prevention device characterized by being formed to have almost the same size as the snow eave formation. 2. The snow eaves prevention device according to claim 1, wherein the slit-shaped gap D is configured to be expandable and contractible. 3 The upper edge of the outer edge of structures such as parapets, caps, protective walls on elevated railways and roads, and structures (advertisement towers, signboards, signals, etc.) 2
A blow-up part 13 provided continuously above the blow-up part 13, and a slit-shaped gap part D located directly above the blow-up part 13.
The blow-off part 14 has a triangular cross-section and is separated from
It is formed as an inclined surface 13A that slopes downward from the outside of the structure toward the inside so as to guide the wind blowing from the inside of the structure toward the outside to the intermediate section D, and Outer surface 1
3B is formed on an extension of the outer surface of the upper edge portion 2, and a surface 14A of the blow-off blow-up portion 14 facing the inside of the structure is configured to prevent the wind from blowing from the inside of the structure toward the outside. As inclined surfaces 14B and 14C with a horizontal V-shaped cross section that slope upward and downward from the center toward the outside of the structure so as to guide the The snow eaves generation prevention device is characterized in that the outer surface 14D of the blow-off part 14 is formed on an extension of the outer surface 13B of the blow-off part 13. 4. The snow eaves prevention device according to claim 3, wherein the slit-shaped gap D is configured to be expandable and retractable.