JPH0517026U - Roof structure for snow retaining - Google Patents

Abstract

(57) [Summary] [Purpose] The snow layer formed on the concave roof top, whose central portion is lower than both sides, is appropriately blocked, and a small amount of snow is dropped from the roof top to prevent large amounts of snowfall. In this way, the occurrence of snow canopy and dripping can be prevented, and further, the occurrence of a personal injury such as a passerby falling under the snow. [Structure] The net-like body 3 is provided on the edges 2x ... 2x of the V-shaped roof 2 in which the central portion 2c has a concave shape lower than the side portions 2a, 2a.
Alternatively, the preventive fence 5 including the wire 7 or the horizontal member 8 and the connecting member 9 is stretched, and the four sides of the roof 2 are surrounded by the preventive fence 5. Specifically, the upright columns 4 ... 4 are fixedly installed above the four corners of the roof 2, and these upright columns 4 ... 4 are fixed.
The reticulate body 3 or the wire 7, the horizontal member 8 and the connecting member 9 are stretched over.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a snow retaining roof structure, and more particularly to a snow retaining structure for a roof having a concave shape whose central portion is lower than both side portions.

[0002]

[Prior Art]

 Commonly known roof shapes are those in which the central part has a convex shape higher than both sides, such as a parquet roof or a gable roof, or a flat shape without flatness such as a flat roof. is there. In addition, as a special roof shape other than these, there is a V-shaped roof having a concave shape whose central portion is lower than both side portions. If a building with this V-shaped roof shape is present in a snowy area, the snow accumulated on the roof will not slide down and remain in the central part, so it is possible to reach a very high position above the roof. When the snow layer is formed and the height exceeds the allowable height, a large amount of snow will fall from the edge of the roof all at once. For this reason, passers-by, etc. will be adversely affected by a large amount of snowfall. In addition, snow eaves and drips may occur at the edge of this type of roof, and it is extremely dangerous for ice blocks and icicles to fall at the drips. In order to deal with such a problem, for example, Japanese Patent Laid-Open No. 62-206150 discloses a roof structure in which a snow-melting device including a heating element is attached at or near the center of a V-shaped roof. In addition, Japanese Utility Model Laid-Open No. 63-200063 discloses a roof structure having a heating element built in along the surface of a V-shaped roof.

[0003]

[Problems to be solved by the device]

 By the way, the roof structures disclosed in both the above publications are excellent in that snow layers can be melted, but the equipment requires a large amount of money, and a large amount of electric power is required to surely melt the snow. Therefore, it is extremely disadvantageous in terms of cost. In addition, since the snow melting device such as a heating element has a limit of use, it is difficult to endure long-term use and is disadvantageous in terms of durability. Further, when the snow melting device fails, the snow melting effect cannot be naturally obtained, and there is a problem that it takes time and money to repair it.

The present invention has been made in view of the above circumstances, and avoids snow damage caused in a roof structure in which a central portion has a concave shape lower than both side portions, by using a novel means that is inexpensive and has excellent durability. This is a technical issue.

[0005]

[Means for Solving the Problems]

 The roof structure according to the present invention, which has been made to solve the above technical problems, has the following features. That is, in a concave roof structure in which the central portion is lower than both side portions, a prevention fence of a predetermined height is stretched above the edge of the roof. A specific example of the prevention fence may be one in which a net-like body is stretched between standing columns, and a plurality of tension members are vertically arranged between the standing columns to form a horizontal line. It may be stretched in the direction, and further, at least a pair of horizontal members are installed in the horizontal direction with vertical intervals between the standing columns, and a plurality of horizontal members are provided between the pair of horizontal members. The connecting member may be vertically stretched.

[0006]

[Action]

 According to the above means, a snow layer is formed on the upper surface of the concave roof, and even if the height of the snow layer becomes extremely high, the action of the prevention fence stretched over the edge of the roof causes the snow layer to move at once. A large amount of snowfall is prevented, and even if the snow layer grows horizontally and protrudes outward from the edge of the roof, this protruding part is cut off by the prevention fence and falls early. Therefore, the snow layer on the roof top will gradually fall to the ground due to the action of the protection fence, and the problem that a large amount of snow will occur will be avoided. This is because when the snow layer grows horizontally due to the influence of wind and the effect of its own weight, and it protrudes from the edge of the roof as described above, the weight of the protruding part causes the surface of the fence to be prevented. It is based on the theory that a shearing force is generated on the ridge, and due to this, the protruding portion gradually cuts and falls. In addition, since the fences are heated by the effects of solar radiation and temperature, snow melting occurs at the contact area between the fences and the snow layer, which facilitates early cutting of the protruding portion. This will prevent accidents resulting in injury or death, etc., which would be caused by a large amount of snowfall underpassers passing by the building.

[0007]

【Example】

 An embodiment of a snow retaining roof structure according to the present invention will be described below with reference to the drawings. As shown in FIG. 1, a roof 2 of a building 1 to which the present invention is applied has a V-shape having a concave shape in which a central portion 2c is lower than both side portions 2a, 2a. Further, at the edge portions 2x ... 2x of the roof 2, a prevention fence 5 having a mesh body 3 is arranged as shown in FIGS. 1 and 2. This prevention fence 5 will be described in detail, in which the standing columns 4 ... 4 are fixedly installed at the four corners of the roof 2, and the mesh bodies 3 ... 3 are stretched over these standing columns 4. is there. Therefore, the upper part of the roof 2 is surrounded by the prevention fences 5 on all sides. The bottom edge of the mesh body 3 shown in FIG. 1 is firmly fixed to the roof 2. A gutter 6 is communicated with the lowest part of the central portion 2c of the roof 2, and the snowmelt water flows down through the gutter 6.

Next, the operation of the above embodiment will be described. As shown in FIG. 3, when snow is accumulated on the upper surface of the roof 2 to form the snow layer X, the action of the prevention fence 5 blocks the snow layer X, and the snow layer X is affected by wind or the like to cause a large amount. The occurrence of the situation that the snowfall of the snow falls at once is prevented. Then, the snow layer X grows in the horizontal direction over time due to the influence of its own weight, the influence of wind, etc. As a result, as shown in FIG. 4, the lateral end portions of the snow layer X are reticulated. It will stick out from the body 3. In this case, a shearing force is generated in the portion indicated by the imaginary line Z where the mesh body 3 is arranged due to the weight of the protruding portion X1 of the snow layer X, which causes a protruding portion as shown in FIG. X1 cuts and falls. This is because the characteristics of the snow layer X do not have sufficient strength against shearing force, and mainly because the snow has characteristics of being soft and brittle. In addition, since the mesh body 3 is heated by the influence of solar radiation and temperature, snow melting occurs at the contact portion between the mesh body 3 and the snow layer X, which promotes early cutting of the protruding portion X1. To be done. Therefore, even if the snow layer X tries to grow outward from the mesh body 3, this growth is limited, and when the slight protrusion portion X1 is generated, the protrusion of the mesh body 3 is caused by the cutting action. The part X1 will fall. As a result, in addition to the prevention of dripping, snow will gradually fall from the roof 2 and a large amount of snow will not occur, and it will be possible to prevent the injuries to passers-by under the snow. Become.

The building to which the present invention can be applied is not limited to the one shown in the above-mentioned drawing, but may be any one as long as the central portion 2c of the roof 2 has a low concave shape, for example, as shown in FIG. It goes without saying that the same can be applied to such a building 1.

FIG. 7 shows an example in which a plurality of wires (stretched ridges) 7 ... 7 are stretched over four standing columns 4 ... 4 as the prevention fence 5, and also by this. The same effect as above can be obtained. In this case, the wires 7 ... 7 are not limited to metal wires, resin wires, glass fiber wires, etc., but heating snow wires may be used to heat and cut the snow layer. A means for giving vibration to the wires 7 ... 7 may be added to achieve early cutting of the protruding portion.

In FIG. 8, a pair of horizontal members 8 and 8 are installed at the upper and lower ends of four standing columns 4 as the prevention fence 5, and between the pair of horizontal members 8 and 8. 9 shows an example in which a plurality of connecting members 9 ... 9 extending in the vertical direction are stretched, and this also provides the same operation and effect as above.

[0012]

[Effect of the device]

 As described above, according to the roof structure for snow retaining according to the present invention, since the prevention fence of a predetermined height is stretched over the edge of the roof where the central portion is lower than both sides, the roof is attached to the upper surface of the roof. Not only is the formed snow layer blocked by the prevention fence, but if the snow layer slightly protrudes outward from the prevention fence, the cutting action of the prevention fence will cause the protruding portion to cut and fall. As a result, dripping of snow and eaves can be prevented, and even when affected by strong winds, the snow gradually falls from the top surface of the roof, so that a large amount of snowfall does not occur and it is caused by snowfall. Occurrence of personal injury will be prevented.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of a snow retaining roof structure according to the present invention.

FIG. 2 is a side view showing a first embodiment of a snow retaining roof structure according to the present invention.

FIG. 3 is a front view of the main parts showing the operation of the first embodiment.

FIG. 4 is an enlarged front view of an essential part showing the operation of the first embodiment.

FIG. 5 is an enlarged front view of an essential part showing the operation of the first embodiment.

FIG. 6 is a perspective view of an essential part showing a second embodiment of a snow retaining roof structure according to the present invention.

FIG. 7 is a main part perspective view showing a third embodiment of a snow retaining roof structure according to the present invention.

FIG. 8 is a perspective view of an essential part showing a fourth embodiment of a snow retaining roof structure according to the present invention.

[Explanation of symbols]

 1 Building 2 Roof 2a Roof side part 2c Roof central part 2x Roof edge 3 Mesh 5 Preventive fence 7 Tension bridge (wire) 8 Horizontal member 9 Connecting member

Claims (4)

[Scope of utility model registration request] 1. A roof structure for snow retaining, wherein the roof structure has a concave shape in which a central portion is lower than both side portions, and a protection fence having a predetermined height is stretched above an edge portion of the roof. 2. The snow retaining roof structure according to claim 1, wherein the preventive fence is formed by stretching a net-like body between standing columns. 3. The snow retaining system according to claim 1, wherein the prevention fence is formed by extending a plurality of tension members between standing columns in the lateral direction with a space vertically provided therebetween. Roof structure. 4. The prevention fence has at least a pair of horizontal members horizontally erected vertically between the upright columns, and a plurality of connecting members are vertically stretched between the pair of horizontal members. The snow retaining roof structure according to claim 1, wherein the roof structure for snow retaining is provided.