JP7323438B2 - Snow cornice prevention device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a snow cornice prevention device attached to the periphery of a roof.

Conventionally, it is known to install a snow cornice occurrence prevention device on the roof of a building in order to prevent the snow cornice from protruding from the roof on the upper edge of the building on the leeward side (see Patent Document 1).

Patent document 1 discloses a snow receiving panel, a snow receiving panel mounting base, and a base, wherein the snow receiving panel mounting base for supporting the snow receiving panel can adjust the inclination angle of the snow receiving panel within an appropriate range. A functional snow cornice prevention device is disclosed. As a result, the inclination angle of the snow receiving panel can be adjusted according to the conditions of the site, such as the direction and speed of the wind at the site.

JP 2018-197484 A

However, the snow cornice prevention device described in Patent Document 1 has a problem that it is affected by the wind.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a snow cornice prevention device capable of preventing the occurrence of snow cornices while minimizing the effects of wind.

In order to achieve the above object, the snow cornice prevention device of the present invention is a snow cornice prevention device that is attached to the periphery of a roof, and is a snow receiving portion formed by horizontal members that are vertically arranged with a space therebetween. and a holding member that holds the snow receiving part, and a base that supports the holding member and is fixed to the roof, wherein the holding member extends in a direction perpendicular to the direction in which the horizontal members are arranged. It is characterized by comprising an extending reinforcing member which is in the shape of a substantially triangular plate when viewed from the side, and which has an L-shaped cross section and is bridged between the apexes of the substantially triangular shape of the holding member.

Further, in the snow cornice prevention device of the present invention, the base portion may include a plate-like portion extending along the upper surface of the roof.

Further, in the snow cornice prevention device of the present invention, a waterproof sheet may be attached to the plate-like portion to cover the exposed surface of the plate-like portion.

Further, in the snow cornice prevention device of the present invention, the holding portion that holds the snow receiving portion of the holding material may be formed to have a U-shaped cross section.

Furthermore, in the snow cornice prevention device of the present invention, the roof may be a flat roof, and the horizontal member may be provided above an upper end of a parapet provided on the flat roof.

In the snow cornice prevention device of the present invention constructed in this way, the snow receiving portion formed by horizontal members arranged vertically with an interval therebetween, the holding member for holding the snow receiving portion, and the holding member. a supporting base fixed to the roof. Therefore, gaps can be formed between the horizontal members, and wind can pass through the gaps between the horizontal members when the wind and snow blow in the horizontal direction. As a result, it is possible to prevent the occurrence of snow cornices while minimizing the influence of the wind.

In addition, the holding member has a substantially triangular plate shape when viewed from the side and extends in a direction perpendicular to the direction in which the horizontal members are arranged. can be made as a single part while ensuring Therefore, it is possible to secure sufficient strength while facilitating the installation of the snow cornice prevention device on the roof.

In addition, by providing a reinforcing member having an L-shaped cross section that bridges between the vertexes of the substantially triangular shape of the holding member, the sharp triangular apex portion of the holding member can be covered with the L-shaped reinforcing member. . Therefore, the snow cornice prevention device can have strength while ensuring safety.

Further, the base has a plate-like portion extending along the upper surface of the roof, so that the force applied to the base of the base can be dispersed. Therefore, overturning of the snow cornice prevention device can be prevented.

Moreover, by attaching a waterproof sheet covering the exposed surface of the plate-like portion to the plate-like portion, the snow cornice prevention device can be attached to the roof while ensuring waterproofness.

In addition, the holding portion that holds the snow receiving portion of the holding material is formed to have a U-shaped cross section, so that one part is attached to one side of the U-shaped holding portion and another part is attached to the other side. be able to. Therefore, it is possible to provide a mounting structure in which other parts can be mounted on one part.

Furthermore, the roof is a flat roof, and the horizontal member is provided above the upper end of the parapet provided on the flat roof, so that a gap can be formed between the upper end of the parapet and the horizontal member. Therefore, it is possible to prevent debris such as dead leaves from accumulating on the snow cornice prevention device, and to prevent debris from clogging drains provided on the roof.

1 is a perspective view showing the configuration of a unit building of Example 1. FIG. 1 is a front view showing a snow cornice prevention device of Embodiment 1. FIG. Fig. 2 is a cross-sectional view showing a state in which the snow cornice prevention device of Example 1 is attached to the roof; 4 is a perspective view showing the snow catcher of the snow cornice prevention device of Embodiment 1. FIG. 4 is a perspective view showing a holding member of the snow cornice prevention device of Embodiment 1. FIG. FIG. 4 is an exploded perspective view showing a method of attaching the plate-like portion of Example 1 to the roof; 4 is an exploded perspective view showing a method of attaching the waterproof sheet of Example 1 to a plate-like portion attached to the roof. FIG. 4 is an exploded perspective view showing a method of attaching the columnar portion to the plate-like portion of Embodiment 1. FIG. 4 is an exploded perspective view showing a method of mounting the holding member and the lower reinforcing member of Example 1 to the base. FIG. FIG. 4 is an exploded perspective view showing how to attach the snow catcher and the upper reinforcing member to the holding member according to the first embodiment; It is a cross-sectional view showing a snow cornice prevention device of another embodiment.

Hereinafter, an embodiment for realizing a snow cornice prevention device according to the present invention will be described based on Example 1 shown in the drawings.

The snow cornice prevention device according to the first embodiment is applied to a unit building constructed by transporting building units manufactured in advance at a factory to a construction site and arranging and assembling a plurality of building units at the construction site. The snow cornice prevention device in Example 1 is installed on the flat roof of the unit building.

[Unit building configuration]
FIG. 1 is a perspective view showing the configuration of a unit building of Example 1. FIG. The configuration of the unit building of Example 1 will be described below with reference to FIG.

In the unit building 1, a plurality of lower floor building units 3 are installed on a foundation 2, a plurality of upper floor building units 4 are installed on the lower floor building units 3, and a plurality of upper floor building units 4 are installed on the upper floor building units 4. A roof 5 is installed.

The roof 5 is formed as a flat roof, and a parapet 6 is provided around the periphery of the roof 5 . For example, four snow cornice prevention devices 10 are installed along one side of the periphery of the roof 5 .

The building units 3 and 4 are composed of columns made of square steel pipes placed at the corners, floor beams made of channel steel connecting the lower ends of the columns, and channel steel connecting the upper ends of the columns. It is formed as a frame structure from ceiling girders and

[Snow cornice prevention device configuration]
FIG. 2 is a front view showing the snow cornice prevention device of the first embodiment. FIG. 3 is a cross-sectional view showing a state in which the snow cornice prevention device of Example 1 is attached to the roof. FIG. 4 is a perspective view showing the snow receiver of the snow cornice prevention device of the first embodiment. 5 is a perspective view showing a holding member of the snow cornice prevention device of the first embodiment. FIG. FIG. 6 is an exploded perspective view showing a method of attaching the plate-shaped portion of the first embodiment to the roof. FIG. 7 is an exploded perspective view showing a method of attaching the waterproof sheet of Example 1 to the plate-like portion attached to the roof. FIG. 8 is an exploded perspective view showing a method of attaching the columnar portion to the plate-like portion according to the first embodiment. FIG. 9 is an exploded perspective view showing a method of attaching the holding member and the lower reinforcing member of the first embodiment to the base. 10 is an exploded perspective view showing a method of attaching the snow receiving portion and the upper reinforcing member to the holding member of the first embodiment. FIG. The configuration of the snow cornice prevention device of the first embodiment will be described below.

As shown in FIGS. 2 and 3, the snow cornice prevention device 10 includes a snow receiving portion 20, a holding member 30, a post 60 as a base portion, a plate-like portion 40 as a base portion, and a reinforcement member. an upper reinforcing member 80, a lower reinforcing member 70 as a reinforcing member, and a waterproof sheet 50.

(Snow receiver)
As shown in FIGS. 3 and 4 , the snow catcher 20 includes a horizontal member 21 and a vertical member 22 that holds the horizontal member 21 .

The horizontal member 21 is, for example, made of aluminum, and is a cylindrical square member of 30 [mm]×50 [mm], and can be 900 to 1700 [mm] long.

Eight horizontal members 21 are arranged in the vertical direction with an interval H1 (for example, 33 [mm]). That is, the horizontal members 21 are arranged vertically with an interval H1 (eg, 30 [mm]) substantially the same as the height (eg, 33 [mm]) of the horizontal members 21 .

The lowest horizontal member 21 is positioned at a height H2 (for example, 100 [mm]) from the upper end of the parapet 6 provided on the roof 5 . That is, the horizontal member 21 is provided above the upper end of the parapet 6 .

Two vertical members 22 are provided in one snow cornice prevention device 10 at a predetermined interval T (for example, 450 [mm] to 1350 [mm]). The vertical members 22 are made of steel, for example. The longitudinal member 22 is formed with a base portion 23 and a flange portion 24 to have an L-shaped cross section. The base 23 is attached to the horizontal member 21 with screws or the like to support the horizontal member 21 . The flange portion 24 is formed with, for example, five mounting holes 24a for mounting the holding member 30 thereon.

(Holding material)
As shown in FIG. 5, the holding material 30 is formed of a steel plate, and includes a body portion 31, an oblique flange 32, a first vertical flange 33, a second vertical flange 34, a first horizontal flange 35, a second and lateral flanges 37 .

As shown in FIG. 3, the main body 31 is formed in a plate shape of a right triangle when viewed from the side. The body portion 31 extends inward from the periphery of the roof 5 in a direction perpendicular to the direction in which the horizontal members 21 are arranged.

As shown in FIG. 5, the oblique flange 32 extends horizontally from the oblique side 31a of the main body 31 forming a right triangle.

The first vertical flange 33 extends horizontally from opposite sides 31b formed in the height direction of the main body 31 forming a right-angled triangle.

The second vertical flange 34 is formed near the vertex 31d of the oblique side 31a and the opposite side 31b of the main body 31 forming a right triangle. The second vertical flange 34 is formed by the body portion 31 and the first vertical flange 33 to have a U-shaped cross section. The second vertical flange 34 is formed with a through hole 34a to which the upper reinforcing member 80 is attached.

The first lateral flange 35 is formed outside the body portion 31 and extends horizontally from the base 31c of the body portion 31 forming a right-angled triangle. A through hole 35 a to which a lower reinforcing member 70 is attached is formed in the first lateral flange 35 . The first lateral flange 35 is provided with a sleeve 36 extending vertically from the inner edge of the first lateral flange 35 . The sleeve portion 36 is formed with a through hole 36a to which the lower reinforcing member 70 is attached.

The second lateral flange 37 is formed inside the body portion 31 and extends horizontally from the base 31c of the body portion 31 forming a right-angled triangle. The second lateral flange 37 is formed with a through hole 37a to which the lower reinforcing member 70 is attached. The second lateral flange 37 includes a sleeve 38 extending vertically from the outer edge of the second lateral flange 37 . The sleeve portion 38 is formed with a through hole 38a to which the lower reinforcing member 70 is attached.

(Plate part)
As shown in FIG. 6 , the plate-like portion 40 is made of steel and includes a body portion 41 and an upright portion 42 .

The body portion 41 is formed in a rectangular plate shape so as to extend along the upper surface of the roof 5 . The plate-like portion 40 is formed with six through-holes 41a and two through-holes 41b near the central portion.

The plate-like portion 40 is attached to the upper surface of the roof 5 via a through hole 41a with a screw S1 (for example, a flathead screw). Also, the plate-like portion 40 is attached to a portion of the roof 5 corresponding to the rafters with screws S2 (for example, wood screws) through the through holes 41b.

The standing portion 42 is formed with a first piece 43 and a second piece 44 to have an L-shaped cross section. The first piece 43 is formed with a through hole 43a to which the support 60 is attached. The second piece 44 is formed with a through hole 44a to which the support 60 is attached.

(waterproof sheet)
As shown in FIG. 7 , a waterproof sheet 50 is attached to the plate-like portion 40 attached to the roof 5 . The waterproof sheet 50 is formed in a rectangular shape larger than the body portion 41 of the plate-like portion 40 . The waterproof sheet 50 is formed with a rectangular opening 51 having a size surrounding the standing portion 42 of the plate-like portion 40 .

The waterproof sheet 50 configured in this manner is attached from above so as to cover the plate-like portion 40 attached to the roof 5 . That is, the waterproof sheet 50 is attached so as to cover the exposed surface of the plate-like portion 40 .

(pillar)
As shown in FIG. 8 , a support 60 is attached to the standing portion 42 . The post 60 is made of steel, and is configured in a U-shape by a body portion 61, a first sleeve portion 62, and a second sleeve portion 63. As shown in FIG.

A through hole 61 a for attaching the support 60 to the upright portion 42 is formed in the lower portion of the body portion 61 . A through hole 61 b to which the lower reinforcing member 70 is attached is formed in the upper portion of the body portion 61 . A through hole 63 a for attaching the support 60 to the upright portion 42 is formed in the lower portion of the second sleeve portion 63 .

In the column 60 constructed in this way, the bolt B is inserted through the through hole 43a of the first piece 43 and the through hole 61a of the body portion 61, and the nut N is tightened. The piece 44 is inserted through the through hole 44 a and the through hole 63 a of the body portion 61 , and the nut N is tightened to attach it to the standing portion 42 .

(lower reinforcement)
As shown in FIG. 9, the lower reinforcing member 70 is made of steel, and is formed with a first flange 71 and a second flange 72 to have an L-shaped cross section.

Through holes 71 a to which the holding members 30 are attached are formed at both ends of the first flange 71 in the longitudinal direction. Through holes 72 a for attachment to the support 60 are formed at both ends of the second flange 72 in the longitudinal direction.

(upper reinforcement)
As shown in FIG. 10 , the upper reinforcing member 80 is made of steel and formed into an L shape by a first flange 81 and a second flange 82 .

The width of the first flange 81 is, as shown in FIG. It is formed longer than the total length of the width of the

As shown in FIG. 10 , through holes 82 a for attachment to the holding member 30 are formed at both ends of the second flange 82 in the longitudinal direction.

As shown in FIG. 9, the snow cornice prevention device 10 configured in this way has a base portion (the plate-like portion 40 and the strut 60) arranged at a predetermined interval T (for example, 450 [mm]) at which the vertical member 22 is provided. ∼900 [mm]) are attached to the roof 5 two by two.

One lower reinforcing member 70 is attached so as to bridge between the struts 60 provided on the outside. Another lower reinforcing member 70 is attached so as to bridge between the struts 60 provided inside. The lower reinforcing member 70 is attached so as to cover the sharp portion of the upper end of the column 60 with a first flange 71 and a second flange 72 formed in an L shape.

The lower reinforcing member 70 and the holding member 30 are attached to the supporting column 60 by fastening the column 60, the lower reinforcing member 70, and the holding member 30 together with bolts. That is, the pillar 60 as a base portion supports the holding member 30 .

Specifically, as shown in FIG. 9, bolts are inserted into the through holes 61b of the inner support 60, the through holes 72a of the inner lower reinforcing member 70, and the through holes 36a of the holding member 30, An inner lower stiffener 70 and retainer 30 are attached to the inner strut 60 .

In addition, bolts are inserted into the through holes 61b of the outer struts 60, the through holes 72a of the outer lower reinforcing member 70, and the through holes 38a of the holding member 30, so that the outer lower reinforcing member 70 and the holding member 30 are attached. are attached to the outer struts 60 .

Further, bolts are inserted into the through holes 71a of the inner lower reinforcing member 70 and the through holes 35a of the holding member 30 through the through holes 90a of the reinforcing plate 90 formed of steel, so that the holding member 30 is , attached to the inner lower stiffener 70 .

Further, bolts are inserted into the through holes 71a of the outer lower reinforcing member 70 and the through holes 37a of the holding member 30 through the through holes 90a of the reinforcing plate 90 formed of steel, so that the holding member 30 is , attached to the outer lower stiffener 70 .

As shown in FIG. 10, the upper reinforcing member 80 is arranged so as to bridge between the vertex portions 31d of the holding member 30 which are formed in a substantially triangular shape when viewed from the side. Bolts are inserted into the through holes 82 a of the upper reinforcing member 80 and the through holes 34 a of the holding member 30 to attach the upper reinforcing member 80 to the holding member 30 . The upper reinforcing member 80 is attached so as to cover the sharp apex portion 31d at the upper end of the holding member 30 with a first flange 81 and a second flange 82 formed in an L shape.

The snow catcher 20 is attached to the holding member 30 by attaching a bolt to the front portion of the main body 31 of the holding member 30 through the mounting hole 24 a of the vertical member 22 . That is, the holding member 30 holds the snow catcher 20 . The upper portion of the front side of the body portion 31 where the snow receiving portion 20 is attached to the holding member 30 is a holding portion formed with a U-shaped cross section by a first vertical flange 33 and a second vertical flange 34. configure.

[Operation of snow cornice prevention device]
The operation of the snow cornice prevention device 10 of the first embodiment will be described below. The snow cornice prevention device 10 of Example 1 is attached to the periphery of the roof 5 . The snow cornice prevention device 10 includes a snow receiving portion 20 formed by horizontal members 21 arranged vertically at intervals, a holding member 30 holding the snow receiving portion 20, and supporting the holding member 30. a base fixed to the roof 5 (FIG. 3).

A gap can be formed between the horizontal members 21 by arranging the horizontal members 21 side by side in the vertical direction at intervals. Therefore, the wind can pass through the gaps between the horizontal members 21 when the wind and snow blow in the horizontal direction. As a result, it is possible to prevent the occurrence of snow cornices while minimizing the influence of the wind.

In addition, since the horizontal members 21 are arranged side by side at intervals, the amount of the horizontal members 21 used can be reduced. Therefore, the weight of the snow cornice prevention device 10 can be reduced.

In the snow cornice prevention device 10 of the first embodiment, the holding member 30 has a substantially triangular plate shape when viewed from the side and extends in a direction perpendicular to the direction in which the horizontal members 21 are arranged ( FIG. 3 ).

As a result, the holding member 30 that connects the snow receiving portion 20 and the base portion can be formed as a single part while ensuring sufficient strength. Therefore, it is possible to secure sufficient strength while facilitating installation of the snow cornice prevention device 10 on the roof 5 .

In the snow cornice prevention device 10 of the first embodiment, a reinforcing member (upper reinforcing member 80) having an L-shaped cross section that bridges between the substantially triangular vertex portions 31d of the holding member 30 is provided (Fig. 10).

As a result, the sharp triangular vertex 31d of the holding member 30 can be covered with the L-shaped reinforcing member (upper reinforcing member 80). Therefore, the snow cornice prevention device 10 can have strength while ensuring safety.

In the snow cornice prevention device 10 of Embodiment 1, the base portion includes a plate-like portion 40 extending along the upper surface of the roof 5 (Fig. 8).

The plate-like portion 40 extending along the upper surface of the roof 5 can disperse the force applied to the root of the base portion. Therefore, overturning of the snow cornice prevention device 10 can be prevented.

In the snow cornice prevention device 10 of the first embodiment, a waterproof sheet 50 is attached to the plate-like portion 40 to cover the exposed surface of the plate-like portion (FIG. 8).

Thereby, the snow cornice prevention device 10 can be attached to the roof 5 while ensuring waterproofness.

In the snow cornice prevention device 10 of the first embodiment, the holding portion for holding the snow receiving portion 20 of the holding material 30 is formed to have a U-shaped cross section (FIG. 5).

As a result, one component can be attached to one surface of the U-shaped holding portion, and another component can be attached to the other surface. Therefore, it is possible to provide a mounting structure that allows a plurality of components to be mounted on one component.

In the snow cornice prevention device 10 of Embodiment 1, the roof 5 is a flat roof, and the horizontal member 21 is provided above the upper end of the parapet 6 provided on the flat roof (Fig. 3).

Thereby, a gap can be formed between the upper end of the parapet 6 and the cross member 21 . Therefore, it is possible to prevent dust such as dead leaves from accumulating on the snow cornice prevention device 10, and to prevent dust from clogging a drainage hole provided on the roof 5. - 特許庁Note that the shape of the parapet 6 is not limited to the above aspect. For example, as shown in FIG. 11, a mountain-shaped parapet 106 may be used.

The snow cornice prevention device of the present disclosure has been described above based on the first embodiment. However, the specific configuration is not limited to this embodiment, and design changes, additions, and the like are permitted as long as they do not depart from the gist of the invention according to each claim.

In the first embodiment, the holding member 30 is formed in a right-angled triangular shape as a substantially triangular shape when viewed from the side. However, the holding member may be formed in a trapezoidal shape that is substantially triangular when viewed from the side.

In the first embodiment, eight horizontal members 21 are arranged in the vertical direction with an interval H1. However, there may be fewer or more crosspieces than eight.

In Example 1, an example in which one snow cornice prevention device 10 is provided with one snow catcher 20 is shown. However, another snow catcher may be attached to the upper end of the snow catcher to adjust the height of the snow cornice prevention device.

In the first embodiment, the snow cornice prevention device 10 is installed on one side of the periphery of the roof 5 . However, the snow cornice prevention device may be installed on two or more sides of the periphery of the roof.

In Example 1, the upper reinforcing member 80 as a reinforcing member covers the sharp vertex 31 d at the upper end of the holding member 30 . However, the reinforcing member may cover other vertex portions of the substantially triangular shape of the holding member 30 .

Embodiment 1 shows an example in which the snow cornice prevention device of the present invention is installed on the flat roof of a unit building. However, the snow cornice prevention device of the present invention can also be applied to a sloped roof such as a gable roof. In addition, the snow cornice prevention device of the present invention can be applied to the roofs of general steel-framed buildings, conventionally constructed buildings, and two-by-four buildings.

5 Roof 6 Parapet 10 Snow cornice prevention device 20 Snow receiver 21 Horizontal member 30 Holding member 40 Plate-like portion 50 Waterproof sheet 80 Upper reinforcing member (an example of reinforcing member)

Claims (5)

A snow cornice prevention device attached to the periphery of a roof, comprising:
a snow receiving portion formed by cross members arranged vertically side by side with a space therebetween;
a holding material that holds the snow catcher;
a base fixed to the roof that supports the holding material;
The holding member has a substantially triangular plate shape in a side view and extends in a direction perpendicular to the direction in which the horizontal members are arranged,
A snow cornice prevention device, comprising: a reinforcing member having an L-shaped cross section that spans between apexes of the substantially triangular shape of the holding member. The snow cornice prevention device according to claim 1, wherein the base portion includes a plate-like portion extending along the upper surface of the roof. The snow cornice prevention device according to claim 2, wherein a waterproof sheet covering an exposed surface of the plate-like portion is attached to the plate-like portion. The snow cornice prevention device according to any one of claims 1 to 3, wherein the holding portion of the holding material that holds the snow receiving portion is formed to have a U-shaped cross section. The roof is a flat roof,
The snow cornice prevention device according to any one of claims 1 to 4, wherein the horizontal member is provided above an upper end of a parapet provided on the flat roof.