JP6755449B1 - Avalanche prevention fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an avalanche prevention fence capable of freely changing the angle of a fence body with respect to a slope as a function of a support mechanism. SOLUTION: A fence main body 11 installed on a slope 1 and a support mechanism 30 for supporting the fence main body 11 on the slope 1 are provided, and the support mechanism 30 rotatably supports the fence main body 11 on the slope 1. The first support leg 31, the support member 40 rotatably supported by the fence body 11 and extending from the fence body 11 toward the slope 1, and the second support leg 33 rotatably supporting the support member 40 on the slope 1. The support mechanism 30 is configured so that the distance between the connection position between the fence main body 11 and the support member 40 and the connection position between the support member 40 and the second support leg 33 can be changed. Thereby, the angle of the fence main body 11 with respect to the slope 1 can be changed. [Selection diagram] FIG. 8

Description

The present invention relates to an avalanche prevention fence installed on a slope.

Conventionally, avalanche prevention fences may be installed on natural slopes and slopes in snowy areas to prevent avalanches from occurring. Some of these avalanche prevention fences are configured so that the angle of the fence with respect to the slope can be adjusted. As such an avalanche prevention fence, for example, Patent Document 1 describes an avalanche prevention fence composed of a lower support column fixed to a slope by an anchor and a support support column and an upper support column provided above the lower support column. There is. In Patent Document 1, the angle of the upper support column with respect to the slope can be adjusted. As a result, the avalanche prevention fence can be installed on the slope so that the upper support and the lower support are along the vertical direction, and thus it is possible to suppress the formation of a cornice at the upper end of the avalanche prevention fence.

Japanese Unexamined Patent Publication No. 2016-006278

However, in the avalanche prevention fence described in Patent Document 1, the angle of the upper support column with respect to the slope can be adjusted by providing a connecting member between the upper support column and the lower support column. Therefore, it is necessary to separately prepare a connecting member for adjusting the angle of the upper support column with respect to the slope to a desired size.

Therefore, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an avalanche prevention fence capable of freely changing the angle of the fence body with respect to the slope as a function of the support mechanism.

The avalanche prevention fence of the present invention includes a fence main body installed on a slope and a support mechanism for supporting the fence main body on the slope, and the support mechanism rotates the fence main body while touching the slope. A first support leg that can be supported on the slope, a support material whose one end side is rotatably supported by the fence body and extends from the fence body toward the slope, and the support material while being in contact with the slope. A second support leg that rotatably supports the other end side of the slope on the slope, and a connection position between the fence body and the support member and a connection position between the support member and the second support leg. by the distance between said support mechanism so as to be changed is configured, Ri angle changeable der of the fence body relative to the inclined surface, the second supporting leg is buried in the ground of the slope It is supported by the anchor to be formed, and the anchor is rotatable with respect to the second support leg .

According to the present invention, as a function of the support mechanism, the angle of the fence body with respect to the slope can be freely changed. Therefore, when the avalanche prevention fence is installed on a slope without using a connecting member as in Patent Document 1, for example, the fence body is installed along the vertical direction regardless of the slope of the slope, or the angle of the fence body with respect to the same slope. Can be adjusted to install the fence body in the desired posture. Further, since the anchor is rotatable with respect to the second support leg, the posture of the anchor in the ground can be arbitrarily determined before the anchor is buried in the ground.

In the present invention, both the second support leg and the support material sandwich the top of the anchor, the portion of the second support leg that sandwiches the top of the anchor, and the top of the anchor in the support material. It is preferable that the three parts are rotatably connected to each other around the connecting member by a connecting member penetrating the three parts including the portion and the top of the anchor .

In the avalanche prevention fence of the present invention, the support material may be stretchable.

In the present invention, by expanding and contracting the support member, the distance between the connection position between the fence body and the support member and the connection position between the support member and the second support leg can be changed.

It is a perspective view which shows the state which the avalanche prevention fence which concerns on embodiment of this invention is installed on the slope. It is a side view of a fence body. 2A is a cross-sectional view taken along the line BB of FIG. 2A. FIG. 2 is a sectional view taken along line CC of FIG. 2A. It is a top view which shows the base member. It is a side view which shows the base member. It is a top view of the support material. It is a side view of a support material. It is a side view of an anchor. It is a side view which shows the connection state of a fence main body and a support material, and the connection state of a fence body and a 1st support leg. It is a side view which shows the connection state of a support material, a 2nd support leg, and an anchor. It is a side view which shows the state which the fence main body is installed on the slope so that the support column is along the vertical direction. It is a side view which shows the state which installed the fence main body so that the column | column is along the vertical direction with respect to the slope which is different from FIG. It is a side view which shows the state which installed the fence main body so that the column | column makes a predetermined angle with respect to the vertical direction on the same slope as FIG. It is a side view which shows the deformation example of a fence body.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1, the avalanche prevention fence 10 of the present embodiment is installed on a slope 1 such as a slope and a natural slope. The slope 1 is formed so as to be inclined with respect to the vertical direction (vertical direction in the figure). The avalanche prevention fence 10 includes a fence main body 11 and a support mechanism 30 that supports the fence main body 11 on the slope 1.

The fence main body 11 has columns 12 arranged side by side at equal intervals and beam members 17 erected so as to be orthogonal to the columns 12. The beam member 17 is made of a steel material having a circular cross section extending in the horizontal direction, which is the length direction. As shown in FIGS. 2A and 2B, the support column 12 is made of H-shaped steel, and a plurality of beam members 17 are fixed to one surface portion (inner surface portion in the drawing) 13 by a U-shaped metal fitting 16. Hereinafter, the inside in the drawing is a horizontal component in a direction in which the fence body 11 vertically installed on the slope 1 is inclined so as to approach the slope 1 with the lower end thereof as the center. The outside in the drawing is a horizontal component in a direction in which the fence body 11 vertically installed on the slope 1 is inclined so as to be separated from the slope 1 with the lower end thereof as the center. Regarding FIGS. 3A, 3B, 4A or 4B, the inner and outer directions are the directions in which the base member 37 and the support member 40 are perpendicular to the support column 12, respectively, as shown in FIG. Shall indicate.

Further, the support column 12 is formed with a support column surface side connection portion 21 connected to the support member 40 described later and a support column end side connection portion 25 connected to the first support leg 31 described later. The strut surface side connecting portion 21 is a protruding piece provided between a pair of adjacent beam members 17. A cross section of the support column side connection portion 21 is shown in FIG. 2B. The pair of strut surface side connecting portions 21 have a flat plate shape that projects perpendicularly to the surface portion 13 from one surface portion 13 of the strut 12. The strut surface side connection portion 21 is provided with a strut surface side connection hole 22 penetrating in the thickness direction thereof.

Returning to FIG. 2A, the strut end side connecting portion 25 is formed at the end portion (lower end portion in the drawing) of the strut 12. A cross section of the column 12 at this end is shown in FIG. 2C. At the end, the outer shape of the cross section of the support column 12 is quadrangular, so that one face portion 13 and the other face portion (outer face portion in the drawing) 14 facing the one face portion 13 and the tips of both are connected to each other. It is composed of two integrally molded side surface portions 25. The side surface portion 25 is formed at the lower end portion of the support column 12, and the side surface portion 25 constitutes the support column end side connection portion 25. A strut end side connection hole 26 is formed near the center of the side view of the strut end side connection portion 25.

The support mechanism 30 has a first support leg 31, a support member 40, a second support leg 33, and an anchor 50, which will be described below. As shown in FIG. 3A, the pair of first support legs 31 and the pair of second support legs 33 are integrally formed on the rectangular plate-shaped support plate 35. A semicircular edge in plan view formed between the two second support legs 33 of the support plate 35 constitutes the edge 36 of the support plate 35 between the pair of second support legs 33. The support plate 35, the first support leg 31, and the second support leg 33 form the base member 37.

As shown in FIG. 3B, the first support leg 31 is formed at one end (outer end in the drawing) of the support plate 35. The first support leg 31 has a flat plate shape that rises upward from the upper surface of the support plate 35, and is provided with a first support hole 32 that penetrates in the thickness direction thereof.

The second support leg 33 is formed at an end portion (inner end portion in the drawing) of the support plate 35 opposite to the first support leg 31. The second support leg 33 has a flat plate shape that rises upward from the upper surface of the support plate 35, and is provided with a second support hole 34 that penetrates in the thickness direction thereof.

As shown in FIG. 6, the first support leg 31 and the column end side connecting portion 25 are connected via a bolt 61. As a result, the base member 37 and the fence main body 11 can rotate around the center C1 with respect to each other.

The support member 40 shown in FIGS. 4A and 4B expands and contracts in the length direction by being composed of the turnbuckle 47. The support member 40 includes a fence main body connecting portion 41 connected to the fence main body 11, a second supporting leg connecting portion 44 connected to the second supporting leg 33, and a fence main body connecting portion 41 and a second supporting leg connecting portion 44. It has a turnbuckle 47 that connects the and.

The fence main body connecting portion 41 is connected to one end (outer end portion in the drawing) of the turnbuckle 47 and is formed in a plate shape. At the tip of the fence body connecting portion 41, a fence body connecting hole 42 penetrating in the thickness direction thereof is provided.

The second support leg connecting portion 44 is connected to the other end (inner end portion in the drawing) of the turnbuckle 47 and is formed in a U shape in a plan view. The tip of the second support leg connecting portion 44 is provided with a second supporting leg connecting hole 45 penetrating in the thickness direction thereof.

The turnbuckle 47 has a body 48 in which female threads are formed on the inner surface, and screw rods 49a and 49b in which male threads are formed on the outer surface and screwed on both sides of the body 48. One threaded rod 49a is threaded right and the other threaded rod 49b is threaded left. Therefore, when the body 48 is rotated in one direction, the screw rods 49a and 49b both move inward of the body 48, and when the body 48 is rotated in the other direction, the screw rods 49a and 49b both move inward of the body 48. As a result, the length of the turnbuckle 47 can be adjusted by rotating the body 48 around the axis.

As shown in FIG. 5, the anchor 50 has a cylindrical shape. An anchor hole 51 that penetrates the anchor 50 in a direction orthogonal to the length direction is provided at the top (upper end in the drawing) of the anchor 50.

As shown in FIG. 6, the fence body connecting portion 41 and the strut surface side connecting portion 21 are connected via a bolt 62. As a result, the support member 40 and the fence main body 11 can rotate around the center C2 with respect to each other. That is, the support member 40 is rotatably supported by the fence body 11. Further, as shown in FIG. 7, the second support leg 33, the second support leg connection portion 44, and the anchor 50 are connected via a bolt 63. As a result, the base member 37, the support member 40, and the anchor 50 can rotate around the center C3 with respect to each other.

Next, a procedure for installing the avalanche prevention fence 10 of the present embodiment on the slope 1 will be described.

First, on the slope 1 where the avalanche prevention fence 10 is to be installed, the position where the avalanche prevention fence 10 is to be installed is determined. According to the installation position determined by this, the anchor 50 is buried in the ground in the vertical direction except for the top thereof (see FIG. 8). After burying the anchor 50, the support plate 35 is positioned on the slope 1 so that the top of the anchor 50 on the ground surface is located between the two second support legs 33. At this time, since the length direction of the support plate 35 is along the inclination direction of the slope 1, the second support leg 33 is located above the slope 1 with respect to the first support leg 31.

Then, the support member 40 is held so that the tip end portion of the second support leg connecting portion 44 is sandwiched between the top portion of the anchor 50 and the second support leg 33. In this state, the center of the second support hole 34, the center of the second support leg connection hole 45, and the center of the anchor hole 51 are aligned, and the bolt 63 is inserted into these holes 34, 45, 51 to make a nut (not). Temporarily fix with (shown). As a result, the second support leg 33, the second support leg connection portion 44, and the anchor 50 are connected via the bolt 63, and the anchor 50 buried in the ground and the base member 37 positioned on the slope 1 are connected. The support member 40 can rotate around the center C3. In other words, the second support leg 33 rotatably supports the support member 40 on the slope 1. The connection position between the support member 40 and the second support leg 33 refers to the center C3.

Next, the strut end side connection portion 25 of the fence main body 11 is fitted between the pair of first support legs 31, so that the center of the first support hole 32 and the center of the strut end side connection hole 26 are aligned. Bolts 61 are inserted into these holes 32 and 26 and temporarily fixed with nuts. As a result, the first support leg 31 and the fence main body 11 are connected, and the first support leg 31 rotatably supports the fence main body 11 on the slope 1 around the center C1. In this state, the fence body 11 is rotated, the fence body 11 is held so that the support columns 12 stand upright, and the nuts are tightened and fastened to the bolts 61.

In the support member 40 in which the second support leg connection portion 44 is rotatably supported by the anchor 50 and the second support leg 33, the body 48 of the turnbuckle 47 is rotated about an axis to adjust the length of the support member 40. .. At this time, the length of the support member 40 is determined so that the support member 40 connected to the anchor 50 supports the fence body 11 with an appropriate force. After that, the fence body connecting portion 41 is sandwiched between the pair of strut surface side connecting portions 21, and the center of the strut surface side connecting hole 22 and the center of the fence body connecting hole 42 are aligned with each other, and these holes 22 and 42 are formed. Insert the bolt 62 and fasten it with a nut. As a result, the fence main body 11 and the support member 40 are connected, and the support member 40 extends from the fence main body 11 toward the slope 1. The connection position between the fence body 11 and the support member 40 points to the center C2.

Finally, the nut temporarily fixed at the connection point between the second support leg 33, the second support leg connection portion 44, and the anchor 50 is retightened and fastened to the bolt 63. As a result, the positional relationship between the anchor 50, the base member 37, the fence body 11, and the support member 40 is fixed, and the installation of the avalanche prevention fence 10 is completed. As described above, since the fence body 11 is installed on the slope 1 so as to stand vertically, snow is deposited between the fence body 11 and the slope 1. At this time, it is possible to suppress the formation of a cornice over the upper end of the fence body 11 from the inside to the outside, and to suppress the occurrence of an avalanche due to the collapse of the cornice.

As described above, the fence main body 11 shown in FIG. 8 is installed so that the support columns 12 are along the vertical direction. At this time, the length of the support member 40 was adjusted so that the distance between the connection position C2 and the connection position C3 was L1. The angle of the fence body 11 with respect to the slope 1 is θ1.

In the avalanche prevention fence 10 of the present embodiment, the support member 40 can be expanded and contracted to adjust the length. Thereby, the distance L between the connection position C2 between the fence main body 11 and the support member 40 and the connection position C3 between the support member 40 and the second support leg 33 can be changed. As a result, as a function of the support mechanism 30, the angle of the fence body 11 with respect to the slope 11 can be freely changed. Therefore, when the avalanche prevention fence 10 is installed on the slope 1, for example, the fence body 11 is installed along the vertical direction regardless of the slope of the slope 1, or the angle of the fence body 11 with respect to the same slope 1 is adjusted to obtain a desired posture. The fence body 11 can be installed in.

As a first example, a case where the fence main body 11 is installed along the vertical direction regardless of the slope of the slope 1 will be described. As shown in FIG. 9, when the fence main body 11 is installed so that the support columns 12 follow the vertical direction with respect to the slope 2 having a slope larger than the slope 1 of FIG. 8, the angle θ2 of the fence main body 11 with respect to the slope 2 is an angle. It is smaller than θ1. Therefore, the length of the support member 40 is adjusted so that the distance L2 between the connection position C2 and the connection position C3 is shorter than the distance L1. It is also possible to install the fence main body 11 so that the columns 12 follow the vertical direction on a slope having a slope smaller than that of the slope 1.

As a second example, a case where the fence body 11 is installed in a desired posture by adjusting the angle of the fence body 11 with respect to the same slope 1 as in FIG. 8 will be described. When the fence body 11 is installed on the slope 1 at an angle θ3 larger than the angle θ1, the support member 40 is set so that the distance L3 between the connection position C2 and the connection position C3 is longer than the distance L1 as shown in FIG. Adjust the length of. As a result, the first support leg 31 and the support member 40 support the fence body 11 in a state where the fence body 11 is rotated around the center C1 in a direction away from the slope 1 with respect to the vertical direction. From the viewpoint of suppressing the formation of the cornice, it is preferable that the angle at which the fence body 11 is tilted around the center C1 with respect to the vertical direction is less than 45 degrees.

Although the embodiments of the present invention have been described above with reference to the drawings, it should be considered that the specific configuration is not limited to these embodiments. The scope of the present invention is shown not only by the description of the above-described embodiment but also by the scope of claims, and further includes all modifications within the meaning and scope equivalent to the scope of claims.

In the above embodiment, the distance L between the connection position C2 and the connection position C3 is changed by expanding and contracting the support member 40, and the angle θ of the fence body 11 with respect to the slope 1 is changed, but the present invention is not limited to this. For example, as shown in FIG. 11, the fence main body 11 has a plurality of strut surface side connecting portions 21a, 21b, 21c formed on one surface portion 13 of the strut 12 at intervals in the length direction of the strut 12. May be good. Then, from these plurality of support column surface side connection portions 21a to 21c, the support column surface side connection portions 21a to 21c for connecting the fence body connection portion 41 of the support member 40 can be arbitrarily selected to connect to the connection position C2. The distance L from the position C3 can be changed, and the angle θ of the fence body 11 with respect to the slope 1 can be changed.

In the above embodiment, the base member 37 in which the first support leg 31 and the second support leg 33 are integrally formed is used, but the present invention is not limited to this, and the first support leg 31 and the second support leg 33 are separate members. However, the same effect can be obtained.

In the above embodiment, the anchor 50 is buried in the ground in the vertical direction. However, the second support leg 33 is supported by the anchor 50 buried in the ground of the slope 1, and the anchor 50 is rotatable with respect to the second support leg 33. Therefore, the posture of the anchor 50 in the ground can be arbitrarily determined before the anchor 50 is buried in the ground. Therefore, for example, the anchor 50 may be buried in the ground so as to be perpendicular to the slope 1.

In the above embodiment, one anchor 50 connected to the support member 40 and the second support leg 33 and supporting them is buried in the ground, but the present invention is not limited thereto. As a first modification of the anchor, in addition to the anchor 50, an anchor (not shown) connected to the fence main body 11 and the first support leg 31 and supporting them is placed in the ground along the direction in which the support column 12 extends. It may be buried. As a result, the anchor can more firmly support the fence body 11 and the first support leg 31.

As a second modification of the anchor, instead of the anchor 50 described above, an anchor (not shown) is embedded above the slope 1 above the anchor 50, and the top of the anchor and the second support leg 33 are not shown. A structure may be adopted in which the second support leg 33 is supported on the slope 1 by connecting with a wire. At this time, by further connecting the top of the anchor and the fence body 11 with another wire, the fence body 11 can be supported more firmly.

In the above embodiment, the support column 12 made of one member is used, but the present invention is not limited to this. As shown in FIG. 11, the support column 12 is composed of two columns, an upper column 12a and a lower column 12b, and each of these columns 12a and 12b is connected in the length direction by using bolts 66 to form one column. It may be 12. As a result, the two divided columns 12a and 12b are more compact than the columns 12 made of one member, and are easier to carry.

Similarly, with respect to the beam member 17, in the above-described embodiment, the beam member 17 composed of one member is used, but the present invention is not limited to this. The beam member 17 is composed of two beam members (not shown), and one beam member 17 may be formed by connecting these two beam members in the length direction using a joint member. As a result, the two divided beam members are more compact than the beam member 17 made of one member, and are easier to carry.

In the above embodiment, the fence main body 11 to which the beam member 17 is attached to the support column 12 in advance is connected to the first support leg 31 and the support member 40 and installed on the slope. However, the present invention is not limited to this, and the strut 12 is connected to the first support leg 31 and the support member 40 in a state where the strut 12 and the beam member 17 are separated, and after the strut 12 is installed on the slope, the beam member 17 is attached to the strut 12. May be attached.

1 Slope 10 Avalanche prevention fence 11 Fence body 30 Support mechanism 31 1st support leg 33 2nd support leg 40 Support material 50 Anchor

Claims (3)

A fence body installed on a slope and a support mechanism for supporting the fence body on the slope are provided.
The support mechanism
A first support leg that rotatably supports the fence body on the slope while grounding on the slope.
A support material whose one end side is rotatably supported by the fence body and extends from the fence body toward the slope.
A second support leg that rotatably supports the other end side of the support member on the slope while being in contact with the slope.
Have,
The support mechanism is configured so that the distance between the connection position between the fence body and the support member and the connection position between the support member and the second support leg can be changed, so that the support mechanism is configured with respect to the slope. Ri can be changed der the angle of the fence body,
An avalanche prevention fence characterized in that the second support leg is supported by an anchor embedded in the ground of the slope, and the anchor is rotatable with respect to the second support leg . Both the second support leg and the support material sandwich the top of the anchor.
The connecting member is formed by a connecting member that penetrates three parts, that is, a portion of the second support leg that sandwiches the top of the anchor, a portion of the supporting material that sandwiches the top of the anchor, and a portion that includes the top of the anchor. The avalanche prevention fence according to claim 1, wherein the three portions are rotatably connected to each other at the center. The avalanche prevention fence according to claim 1 or 2, wherein the support material is stretchable.

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