JP4164405B2 - Snowfall prevention device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a device for preventing snow pail occurrence, and more particularly, to a device for preventing snow pail occurrence for a building having a drooping bottom surface having a possibility of snow pail occurrence, such as an edge of a roof.
[0002]
[Prior art]
As shown in FIG. 8 and FIG. 9, a conventional product T is known in which a snow bag generation preventing member having a triangular cross section is attached to the hanging surface F of the building B, as shown in FIGS. (For example, refer to Patent Document 1). The problem with this example is that there is a single inclined surface L, so various types of prevention devices having different sizes must be prepared in order to cope with various amounts of snow, and it is difficult to standardize the prevention device. In places where there is a lot of snow, it is necessary to increase the height, and the bottom part becomes wider in proportion to this, but the area of the support surface of the building that supports it may be limited. Because there are many, it can not be too high. In order to solve this problem, it is also considered to install a snow-cutting plate at the top of the triangle. However, if the snow-cutting plate is enlarged, a large wind pressure is received and the blowing effect by the inclined surface L is reduced. There is a risk of more snow falling on the inside.
[0003]
[Patent Document 1]
Japanese Patent No. 2882888 [0004]
[Problems to be solved by the invention]
The problem to be solved by the present invention is to use a snow blowing function to manufacture a device corresponding to the amount of snow at low cost with standardized parts, and to prevent the occurrence of snow scum that is lightweight, has a small installation area, and is easy to install. To provide an apparatus.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a snow scum occurrence prevention device according to the present invention includes a pair of vertical edge members that are substantially fixed along a bottom end surface in a building having a bottom end surface that may cause snow pail. In the meantime, by holding the wing members that are inclined upward and downward in parallel in multiple stages, it prevents the occurrence of snow traps by utilizing the effect of blowing off snow, and prevents the vertical edge member from increasing without increasing the depth of the device. By setting the height and the number of stages of the wing members, it is possible to install an optimum device corresponding to various snow loads.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
According to the present invention, there is provided an apparatus for preventing snowfall from occurring in a snowfall occurrence preventing apparatus installed along a drooping bottom surface of a building having a drooping bottom face that may cause snowfall, between a pair of vertical edge members. A plurality of wing members having the same cross section are arranged at intervals, and both ends of the wing members are held by a pair of the vertical edge members, and the wing members have their wing chords outwardly from the building in a horizontal plane. An inner bulge and an outer bulge that incline from below to above at an angle of at least 45 degrees and smoothly bulge inward and outward of the building on the lower surface of the wing member A main feature is that a strip is formed, and the vertical edge member is fixed to a support member erected along the hanging end surface on the building.
[0007]
Further , in order to hold the wing member that prevents exposure of a fixture or the like that exposes the surface of the wing member, a plurality of hollow shafts provided on both side ends of the wing member are connected to side edges of the vertical edge member. A plurality of protrusions protruding from the head are inserted and held.
[0008]
Furthermore , in order to cope with a snowy region, a separate vertical edge member is joined to the upper end of the vertical edge member, and the multi-stage wing members are arranged and held.
[0009]
【Example】
Embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 to FIG. 4 show a state in which the snow scum occurrence prevention device according to the present invention is installed. In these drawings, the symbol B indicates a building, the symbol P indicates a parapet of the building B, the symbol F indicates a drooping lower end surface on which a snow pail may be generated, and the symbol D indicates a snow pail occurrence preventing device. Yes. In the case where no means for preventing the occurrence of snowfall is installed, a snowfall is generated from the outside of the parapet P toward the drooping face F in the direction in which the wind direction during snowfall is outward from the building, and the generated snowfall has grown. In some cases, an unexpected snowfall can cause an accident. The apparatus for preventing snowdrops D according to the present invention is provided along the bottom end face F of a building B having a bottom end face F that may cause snowfall, that is, in the embodiment shown in FIGS. It is installed along the parapet P constructed on the edge.
[0010]
For example, the device for preventing snowdrops D is manufactured by extruding a light metal such as aluminum at intervals between the pair of vertical edge members 1 and 1 made of, for example, a steel material having a square cross section. A wing member 2 having a cross section is disposed, and both ends of the wing member 2 have a main configuration held by a pair of vertical edge members 1 and 1. Various means may be employed for holding the wing member 2, but it is possible to cope with expansion and contraction of the wing member 2 due to temperature change, and it is simple that no protrusions protrude from the surface of the wing member 2 and snow accumulates and stays there. It is recommended to adopt a holding structure as shown in FIG. 4 as an inexpensive structure. That is, the hollow shafts 3 and 3 having two through holes are formed at predetermined positions in the front and rear sides of the wing member 2, and the wing member 2 is maintained at a predetermined angle on the vertical edge member 1 and the hollow shaft 3 is formed. , 3 are perforated at the positions corresponding to 3, 3, and during assembly work, a headed pin 5 is inserted into each throughhole 4 and a retaining member 6 is fitted. By inserting 7 into the corresponding hollow shaft 3 of the wing member 2, the vertical edge member 1 holds the wing member 2. This means is employed at both side ends of the wing member 2 and enables the wing member 2 to be held while allowing expansion and contraction between the pair of vertical edge members 1 and 1.
[0011]
FIG. 5 shows another embodiment of the wing member 2. In this wing member 2, hollow shafts 3a as two tapping screw holes are provided at predetermined positions in the front and rear sides of the wing member 2. In this example, a tapping screw (not shown) is passed through the through hole 4 of the vertical edge member 1 as a means for holding the wing member 2 by inserting a plurality of protrusions protruding from the side edges of the vertical edge member 1. The retaining structure is employed in which the hollow shafts 3a and 3a of the wing member 2 are respectively screwed. In this example, the expansion / contraction of the wing member 2 due to a temperature change is performed by a process by bending the wing member 2 or a process having a rubber packing or a spring that can be compressed and deformed at the attachment site. The number of parallel wing members 2 is determined according to the amount of snow in the area where the wing members 2 are installed. The interval between the parallel wing members 2 is a distance at which the upper edge of the lower wing member 2 overlaps with the lower edge of the upper wing member 2 when viewed in the horizontal direction.
[0012]
As shown in FIG. 3, the opposing vertical edge members 1, 1 of the adjacent snow leopard generation prevention device D are used to carry the upper part C of the columnar support member S with its lower end fixed to the parapet P of the building B. The three members are rigidly fixed together by bolting or the like. In this example, the support member S for the building B having the parapet P has been described. However, there is a building B in which the parapet P does not exist. In such a case, the support member S cannot be fixed as described above. This kind of support means can be designed in various ways from the publicly known technology, and according to the structure of the building B, the vertical edge member 1 of the snow scum occurrence prevention device D is rigidly supported, so As long as it is a means that can reliably stand at a predetermined location of the building B, various known means may be employed as the support member S. As described above, the snowfall prevention device D has a structure that is securely attached to the building B by the support means S with an appropriate span, and therefore, the snowfall occurrence prevention device D has sufficient strength against wind and snow pressure. Moreover, the snowfall prevention apparatus D is normally connected and connected along the drooping lower end surface F of the building B with the possibility of the occurrence of snowfall as described above. Since the members constituting the snow scum generation prevention device D are not particularly large and light in weight, the members can be easily transported, and the installation work is also easy.
[0013]
In the device for preventing snow scum occurrence D according to the present invention, a plurality of wing members 2 are arranged at intervals in the vertical direction with respect to the vertical edge member 1, and the wing members 2 have their chords outward from the building B in a horizontal plane. The airflow including the snowfall to the outside from the building B that generates a snowfall as shown in FIG. 6 is caused between the plurality of wing members 2 and 2. Passing or flowing along the uppermost wing member 2 blows off the outside of the building B and acts so as not to cause snowfall near the bottom end surface F of the building B. Compared with the conventional product T having the triangular cross-section shown in FIG. 8, the conventional product T has a large depth of the inclined surface T, so a vortex is generated inside the installation position, and snow accumulation inside the building is promoted by a snowdrift. Therefore, the inclined surface T is covered with snow relatively early and the ability to blow off the snow is hindered, whereas in the present invention, the depth of the wing member 2 is smaller than the depth of the conventional product T having the inclined surface L. Therefore, there is little resistance to the air current, no vortices are generated inside, snow accumulation inside the building due to snowdrifts is prevented, and blowing ability is not reduced. Moreover, since the directivity area with respect to wind and snow increases, the blowing ability is increased, and snowfall is guided further from the drooping end face F of the building B. Furthermore, in the conventional product T, the airflow including snowfall that has passed through the inclined surface L returns to the drooping face F side by the vortex due to the decrease in the air pressure on the drooping face F side, and an effect of generating a snowfall occurs. Since the lower vortex generated by the wing member 2 has a rectifying action that is canceled by the blowing force of the lower wing member 2, the return of the snowfall to the drooping face F side by the entire vortex is very small, which prevents the occurrence of snowfall Improve the effect.
[0014]
Next, when the snow cover A is thick on the building B, in the conventional product T, as shown in FIG. 9, the snow cover A accumulates partway along the inclined surface L, so that the exposed portion of the inclined surface L is exposed. Will decrease, the blowing force against snowfall will be greatly reduced, increasing the possibility of the occurrence of snowfall. On the other hand, in the present invention, as shown in FIG. 7, the space between the lower wing members 2 is filled with snow A, but the distance between the wing members 2 is the upper edge of the lower wing member 2 when viewed in the horizontal direction. Is at least a distance that overlaps the lower edge of the upper wing member 2 before the snow cover A in the gap reaches the upper edge of the lower wing member 2 between the lower wing members 2. Since the snow cover A reaches the lower edge of the wing member 2 and the gap between the wing members 2 is closed by the snow cover A, no further snow is allowed to enter the gap, and the snow ridge is not allowed to enter the leeward side. In addition to preventing formation, the upper wing member 2 is exposed from the snow accumulation A, so that the blowing force with respect to the airflow including snowfall is sufficiently retained, and the generation of a snowfall due to the airflow can be prevented.
[0015]
There is also a proposal to improve the above-mentioned drawbacks by increasing the height of the conventional product T or attaching an extension plate to the top, but the base length of the triangular section is also increased to increase the height. The device itself is quite large and difficult to manufacture at a low cost, and the bottom area increases, so the installation location is limited, and an extension plate is attached to the top. In this case, since the entire device including the extension plate covers the side of the device in a wide range, the device is constantly subjected to a large wind pressure, and the structure of the device must be made stronger, and the extension plate has a blowing force against snowfall. It is not a special increase. On the other hand, in the present invention, since the installation area is small regardless of the height, the installation location is rarely limited, and since the wing member 2 has the same cross-sectional shape, it can be manufactured at low cost, and the height of the device and the number of wing members 2 can be reduced. If it is set in accordance with the predicted amount of snow accumulation, it is possible to obtain a snow bag prevention device with good ventilation.
[0016]
Since the wing member 2 is arranged in parallel in the vertical direction with a gap, the snow scum occurrence prevention device D according to the present invention does not completely block sunlight and melts snow due to the shade of snow on the building B. Delay can be prevented. Moreover, since the wing member 2 of the snow jar occurrence preventing apparatus D according to the present invention has the same cross section as described above, it can be manufactured at low cost by light metal extrusion. Furthermore, if the wing member 2 is made to be a standard length and the vertical edge member 1 that determines the height of the snow scum occurrence prevention device D is manufactured as an off-the-shelf product having a preset length, it can be manufactured at a very low cost. However, when a special snow ridge prevention device D is required corresponding to a heavy snow region, as shown in FIG. 10, a bolt is joined to the upper end of the lower vertical edge member 1 via a connection fitting 8. By performing the above and the like, it is possible to obtain a device capable of connecting the upper vertical edge members 1 and arranging a larger number of wing members 2.
[0017]
The apparatus for preventing snow scum occurrence D according to the present invention is also characterized by the cross section of the wing member 2. As shown in FIGS. 2 and 5, the upper surface of the wing member 2 is formed outwardly from the building B at a gradually steep angle with respect to the horizontal plane. With such a configuration, the wind direction from the building B side is formed. Can be smoothly guided upward. Further, on the lower surface of the wing member 2, an inner bulging strip 9 and an outer bulging strip 10 that bulge smoothly toward the inner side and the outer side of the building B are formed. The strength of the member 2 can be improved, and the thickness of the pair of holding hollow shafts 3 at the side ends of the wing member 2 can be provided. Further, when the outer bulging strip 10 bulges, the outer gap between the wing members 2 is made narrower than the inner gap when viewed outward from the building B, so that the outer gap has a higher flow velocity than the inner gap. Thus, it is possible to generate the action of lifting the air below.
[0018]
【The invention's effect】
The present invention has the following effects.
A. Since the installation area is small regardless of the height, the installation location is rarely limited, and the amount of snow can be predicted by setting the height of the vertical edge member and the number of stages of the wing members without increasing the depth of the device. Corresponding and well-ventilated snow leopard prevention device can be obtained.
B. Since the depth of the wing member is small, there is little resistance to airflow, vortices are not generated inside the installation, snow accumulation inside the building due to snow accumulation is prevented, blowing ability of the wing member is not reduced, and wind and snow Since the directional area for the increases, the blowing ability is increased, and snowfall is guided farther from the bottom end surface of the building. In addition, since the lower vortex generated by the upper wing member causes a rectifying action to be eliminated by the blowing force of the lower wing member, the return of snowfall to the drooping side of the building by the entire vortex is very small. Improve the prevention effect.
C. Since a plurality of wing members having the same cross-sectional shape are used, they can be manufactured at low cost by extrusion molding or the like.
D. The lower wing members may be covered with snow, but the distance between the wing members is such that the upper edge of the lower wing member overlaps the lower edge of the upper wing member when viewed in the horizontal direction. For example, before the snow in the gap reaches the upper edge of the lower wing member in the lower wing members, the snow reaches the lower edge of the upper wing member, and the gap between the wing members is closed by the snow. Therefore, no further snow intrusion into the gap is allowed, and the formation of snow ridges due to the protrusion of snow on the leeward side can be prevented, and the upper wing member is exposed from the snow, so it blows away against airflow including snowfall. Is sufficiently retained, and the generation of snow mist due to airflow can be prevented.
[0019]
E. Since the wing members are arranged in parallel in the vertical direction at intervals, the sunlight is not completely blocked, and the delay in snow melting due to the shade of snow on the building can be prevented.
F. Since the constituent members are not particularly large but light in weight, the members can be easily transported, and the installation work is also easy.
G. By forming the upper surface of the wing member outwardly from the building at a gradually steep angle with respect to the horizontal plane, the wind direction from the building side can be smoothly guided upward.
H. On the lower surface of the wing member, an inner bulging strip and an outer bulging strip that smoothly bulges inward and outward of the building are formed, so that the strength of the wing member is improved and the wing member A thickness for forming a pair of holding hollow shafts at the side ends can be provided. Also, by bulging the outer bulge, the outer gap between the wing members is made narrower than the inner gap when viewed outward from the building, and the flow velocity of the outer gap is made faster than the flow velocity of the inner gap. An action of lifting the air below can be generated.
I. By connecting the upper vertical edge member to the upper end of the lower vertical edge member, it is possible to obtain a tall snowfall prevention device corresponding to a snowy area in which a larger number of wing members are arranged.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an installation state of a snow scum occurrence prevention device according to the present invention.
FIG. 2 is a longitudinal sectional view showing a main part of the apparatus.
FIG. 3 is a perspective view showing a state in which the apparatus is attached to a building.
FIG. 4 is an exploded perspective view showing a holding structure of a wing member in the apparatus.
FIG. 5 is a longitudinal sectional view showing another embodiment of a wing member.
FIG. 6 is a cross-sectional view for explaining the operation of the device for preventing snow scum occurrence according to the present invention when the amount of snow is small.
FIG. 7 is a cross-sectional view for explaining the operation of the device for preventing snow scum occurrence according to the present invention when the amount of snow accumulation is large.
FIG. 8 is a cross-sectional view illustrating the operation of a conventional product when the amount of snow accumulation is small.
FIG. 9 is a cross-sectional view illustrating the operation of a conventional product when the amount of snow accumulation is large.
FIG. 10 is an exploded vertical cross-sectional view showing a case where vertical edge members are connected in the apparatus for preventing snow scum occurrence according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vertical edge member 2 Wing member 3, 3a Hollow shaft 7 Protrusion 9 Inner bulging strip 10 Outer bulging strip B Building F Suspended bottom surface D Snow plow generation prevention device S Support member

Claims (3)

A device for preventing occurrence of a snowfall, which is installed along a hanging surface of a building having a hanging surface where snowfall is likely to occur, and a plurality of wings having the same cross section spaced vertically parallel between a pair of vertical edge members A member is disposed and both ends of the wing member are held by a pair of vertical edge members, and each of the wing members is at least 45 degrees from the bottom to the upper side with respect to a horizontal plane outward from the building. In addition to inclining at the above angles, an inner bulging strip and an outer bulging strip that bulges smoothly inward and outward of the building are formed on the lower surface of the wing member, An apparatus for preventing the occurrence of a snow skein, which is fixed to a support member erected along the bottom end surface of the building. The apparatus for preventing snow pail occurrence according to claim 1 , wherein a plurality of protrusions protruding from a side edge of the vertical edge member are inserted and held in a plurality of hollow shafts provided at both side ends of the wing member. The apparatus for preventing the occurrence of snow pail according to claim 1 or 2 , wherein a separate vertical edge member is joined to an upper end of the vertical edge member, and the wing members in multiple stages are arranged and held.

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