JP2007023605A - Protective fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective fence capable of easily preventing sediment discharge and falling rocks while using surrounding trees to be vegetated without constructing large-scale foundation work or structures while using thinned wood provide.
A protective fence formed by laying a rope 4 on each of the independent rope support members 2 and 2 separated from each other by a predetermined interval and suspending a fence main body 3 on the rope 4. The fence body 3 includes a plurality of thinning materials 3A, 3A,... Disposed at a predetermined interval, and a net member 3B attached across the thinning materials 3A, 3A,. The trunk of the vegetation tree W to be vegetated penetrates the cord support members 2 and 2 fixed to the ground.
[Selection] Figure 2

Description

  The present invention relates to a protective fence used to prevent the collapse of stones, rocks, surface soil, and the like that occur in mountainous areas and steep slopes, and to protect roads and railways from falling rocks.

  In recent years, effective use of thinned wood has been demanded for forest conservation and forestry promotion. And as a thing using this thinning material, the rock fall prevention fence which uses a thinning material as a buffer material of a falling rock is proposed (for example, refer patent document 1).

The rock fall prevention fence according to the conventional example is constructed by placing concrete on an inclined ground and the like, constructing a foundation made of H-shaped steel at a predetermined interval on the foundation, and H-shaped steel between these adjacent pillars. A rock fall protection wall body is constructed by spanning a plurality of horizontal members made of Then, a net fence is attached to the rock fall protection wall body, and a plurality of thinnings are inserted into the net fence to form a fall prevention fence.
Japanese Patent Laid-Open No. 2005-83068

  However, in the above conventional example, in order to construct a fall protection wall body to which the fall prevention fence is attached, a large-scale foundation work is required, and the construction cost cannot be reduced. In addition, it is difficult to transport H steel used as a support in a mountainous area.

  Therefore, the main problem of the present invention is to prevent landslides and rockfalls easily while using surrounding trees to be planted, without constructing large-scale foundation works or structures, while using thinned wood. It is to provide a protective fence that can.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
The invention described in claim 1 is a protective fence formed by laying a rope on each of the independent rope support members and suspending the fence main body on each of the rope support members which are separated at a predetermined interval. The fence body includes a plurality of thinnings disposed at a predetermined interval, and a net member attached across the thinnings, and the wire support member fixed to the ground. This is a protective fence characterized by the structure in which the trunks of the standing vegetation are floating.

(Function and effect)
By adopting a configuration in which the rope support member on which the rope for suspending the fence body is installed is fixed to the ground, and the trunk of the tree to be vegetated is loose with respect to this rope support member, In normal times, the line support member does not contact the standing tree, or a large external force is not applied even if it touches, but when stones or earth and sand that have fallen from the upper side hit the fence body, the stress is the line support member The stress is absorbed by the standing tree. For this reason, during normal times, without placing a burden on the standing trees, such as inhibiting the growth of standing trees, when stones or earth and sand fall, it is possible to easily use the standing trees to easily prevent sediments from falling out and falling stones. be able to.
Moreover, by using thinned wood for the fence body, construction is easy, construction costs can be reduced, and a landscape in harmony with nature can be brought about.

<Invention of Claim 2>
According to a second aspect of the present invention, there is provided the protective fence according to the first aspect, wherein the rope is constructed on an upper part and a lower part of the rope support member, respectively, and is configured to suspend the upper part and the lower part of the fence body. It is.

(Function and effect)
The ropes are respectively installed on the upper and lower portions of the rope support member, and the upper and lower portions of the fence body are suspended so that the integrity of the fence body is enhanced.

<Invention of Claim 3>
The invention described in claim 3 is characterized in that the thinning material is provided with a holding member that can be supported by sandwiching the thinned material, and the rope is suspended by the holding member. This is a protective fence.

(Function and effect)
Since it is not necessary to provide a through-hole or the like for penetrating the ropes with respect to the thinned wood, construction labor can be reduced and the durability of the thinned wood can be improved.

<Invention of Claim 4>
According to a fourth aspect of the present invention, the rope support member has an engaging portion that allows a trunk of a tree to pass through and is connected to the rope, and a column that supports the engaging portion and is fixed to the ground. The protective fence according to any one of claims 1 to 3, wherein the protective fence is configured to include a portion.

(Function and effect)
The engaging part on which the rope for suspending the fence body is laid is supported by the support part, and this support part is fixed to the ground. Further, the trunk of the tree to be vegetated penetrates the engaging part. By engaging in a normal structure, the engaging part does not touch the standing tree, or a large external force is not applied even if it comes into contact, but when stones or earth and sand that have fallen from the top hit the fence body The stress is transmitted to the standing tree through the engaging portion, and the stress is finally absorbed by the standing tree. For this reason, during normal times, without placing a burden on the standing trees, such as inhibiting the growth of standing trees, when stones or earth and sand fall, it is possible to easily use the standing trees to easily prevent sediments from falling out and falling stones. be able to.

<Invention of Claim 5>
According to a fifth aspect of the present invention, the engaging portion is configured to receive a tensile force from an anchor member penetrating into the ground so as to be suspended from a tensile force received from a rope that suspends the fence body. Item 4. The protective fence according to Item 4.

(Function and effect)
The engaging portion is configured to receive a tensile force from an anchor member penetrating the ground so as to be suspended by a tensile force received from a rope that suspends the fence body, so that the engaging portion does not contact the standing tree, or It becomes easy to maintain a state in which a large external force is not applied even if contact is made. In addition, by receiving a tensile force from the anchor member, when stones or earth and sand that have fallen from above collide with the main body of the fence, the ground also absorbs stress, so that the durability of the protective fence is improved.

<Invention of Claim 6>
According to a sixth aspect of the present invention, the engaging portion includes a set of half-cylindrical back plates having flanges at both ends, and the back plates are connected to form a cylindrical body. And a structure in which the trunk of the standing tree is loosely penetrated, and the column portion penetrates the annular portion formed in the back plate, and the annular portion is locked to the column portion via a fastening member; The protective fence according to claim 4 or 5.

(Function and effect)
The engaging portion is a set of half-plate-shaped back plates having flanges at both ends, and these back plates are connected to form a cylindrical body, and a trunk of a standing tree is allowed to loosen through the cylindrical body. As a result, the work of engaging the standing tree is facilitated. In addition, the support portion penetrates the annular portion formed on the back plate, and the annular portion is locked to the support portion via the fastening member, thereby facilitating the mounting of the engaging portion. Yes.

  ADVANTAGE OF THE INVENTION According to this invention, without using a thinning material, without constructing a large-scale foundation work or a structure, it is possible to easily prevent landslide and prevent falling rocks while using surrounding trees to be vegetated. Etc. are brought about.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. In addition, FIG. 1 is a general view for explaining the situation of damming rocks and the like using the protective fence according to the present invention, FIG. 2 is a general view of the protective fence, and FIG. 3 is a plan view thereof. FIG. 4 is a perspective view of the holding member.
As shown in FIG. 1, the guard fence 1 according to the present invention is separated by a predetermined interval, and the ropes 4, 4 are installed on the respective rope support members 2, 2 that stand independently. 4 and 4 are formed by suspending the fence body 3. Specifically, the rope support members 2 and 2 are fixed to the ground so that the trunks of the standing trees W and W that are vegetated apart from each other with a predetermined interval loosely penetrate the rope support members 2 and 2. And the ropes 4 and 4 are constructed, and a plurality of thinning materials 3A, 3A,... Arranged at a predetermined interval, and a net member 3B attached across these thinning materials 3A, 3A,. The fence body 3 is suspended.

The rope support member 2 has an engaging portion 2A that allows the trunk of the tree W to pass through and is connected to the ropes 4 and 5, and a strut portion 2B that supports the engaging portion 2A and is fixed to the ground. It is equipped with.
2A and 3B, the engaging portion 2A includes a set of half-cylindrical back plates 20 with flanges 21a and 21b formed at both ends, and each flange 21a, 21b are brought into contact with each other and fastened by a fastening tool 22 such as a bolt and a nut, and the back plates 20 and 20 are connected to form a cylindrical body, and a trunk of the standing tree W is loosened in the cylindrical body. It has a configuration. The engaging portion 2A is set in advance so that the diameter of the cylindrical body is larger than the trunk of the standing tree W so that it does not directly contact the trunk of the standing tree W, and the standing tree W has a predetermined interval. To besiege. Thus, since the standing tree W penetrates the engaging portion 2A, the engaging portion 2A does not inhibit the growth of the standing tree W.

  As shown in FIG. 2, the flanges 21a and 21b of the engaging portion 2A are formed with three holes on the top and bottom, and the fastening tool 22 such as a bolt and a nut has two holes on the upper end and the lower end. It can be mounted on. As shown in FIG. 2, the hole at the center is an attachment hole for attaching the ropes 4 and 5 such as wires and ropes. Of the flanges 21a and 21b attached to both ends of the back plate 20, one of the flanges 21a is connected to the rope 4 for suspending a plurality of thinned materials 3A, 3A,. In order to receive a force (reaction force) suspended from the tensile force received from the rope 4 that suspends the main body 3, the rope 5 attached to the anchor member 6 such as a lock bolt that penetrates the ground is connected. ing. In addition, by receiving tensile force from the anchor member 6, when stones or earth and sand that have fallen from the head direction collide with the fence body 3, the ground also absorbs stress, so that the durability of the protective fence 1 is improved. .

  The cord 4 is connected to the flanges 21a and 21a of the engaging portions 2A and 2A, respectively. However, the engaging portion 2A attached to at least one of the standing trees has a cord as shown in FIG. The rope 4 is attached via a turnbuckle 7 for adjusting the tension of the belt 4. For example, a wire or a rope can be used as the material of the cord 4 and the cord 5, and both may be made of the same material.

  As shown in FIGS. 2 and 3, an annular portion 23 is formed in the center portion of the outer periphery of the back plate 20, and the column portion 2 </ b> B can pass through the annular portion 23. And this annular part 23 becomes a structure latched by the support | pillar part 2B via fastening members, such as nut 24, and attachment of 2 A of engaging parts is made easy.

  The column portion 2B is a rod-like member to which a fastening member such as a nut 24 can be screwed. For example, a screw tecon that is a thread-shaped deformed reinforcing bar can be used. This support | pillar part 2B is being fixed in the ground and is independent. In addition, the support 2B may be installed on the ground so that it does not hinder the growth of the roots of the tree W, and at this time, a leg such as a plate is attached to the lower end of the support 2B. Is preferred. Since the nut 24 can be screwed, the above-described annular portion 23 is locked on the nut 24 to prevent the drop, and the engaging portion 2A can be supported.

  As shown in FIGS. 1 and 2, the engaging portion 2A in the present embodiment is inserted into the upper and lower portions of the side surfaces of the thinned materials 3A, 3A,. Two places are attached to one standing tree so as to oppose the upper and lower portions of the thinned wood 3A, 3A,. Thus, what is necessary is just to determine the number of the engaging parts 2A installed according to the number of the rope 4 to be attached.

  As described above, the engaging portion 2A is in a state where the trunk of the vegetation tree W to be vegetated is loosened, so that the engaging portion 2A is first supported by the supporting column portion 2B so as not to fall, and secondly, at a predetermined interval. Are supported by the tensile force of the other engaging portion 2A attached so as to be opposed to each other and the tensile force of the anchor member 6 such as a lock bolt penetrating into the ground. In this way, the engaging portion 2A is in a state where it does not contact the standing tree W or does not receive a large external force even when it comes into contact during normal times. However, when stones or earth and sand that have fallen from the head direction collide with the fence body 3, the engaging portion 2A engages with the trunk of the standing tree W by contact or the like, and the stress is applied to the standing tree W via the engaging portion 2A. In the end, the stress is absorbed by the standing tree W. With such a configuration, during normal times, there is no burden on the standing trees, such as inhibiting the growth of standing trees, but when falling stones or earth and sand, it is easy to effectively use the standing trees. Measures can be taken to prevent sediment discharge and rockfall.

  When attaching the engaging portion 2A, first, the column portion 2B is fixed to the ground at a position centered so that the cylindrical body formed by connecting the back plate 20 of the engaging portion 2A does not contact the standing tree W. Then, the nut 24 is attached to the support column 2B at an appropriate height for raising the fence body 3 upright. And the annular part 23 is penetrated by the support | pillar part 2B, 2 A of engaging parts are latched on the nut 24, and the rope support member 2 is constructed | assembled. In this state, the line 4 is connected, and the line 5 may be connected before or after the anchor member 6 penetrates into the ground.

  The fence body 3 is mounted across a plurality of thinning materials 3A, 3A,... Arranged at a predetermined interval and these thinning materials 3A, 3A,. A net member 3B. The thinning material 3A previously cut to a predetermined length is used as a pillar of the fence body 3, and through holes 30 and 30 are drilled in the upper and lower portions of the side surface of the thinning material 3A. The ropes 4 and 4 are inserted into 30 and the thinned lumbers 3A, 3A,. The fence body 3 is supported and raised by being suspended from the rope 4.

  In addition, in order to stabilize the fence main body 3 and to make it easy to prevent the fall of a stone etc., you may fix the lower end part of the thinning material 3A to the ground. Moreover, it is not restricted to this, The lower end part of 3 A of thinning materials may be installed on the ground, and you may make it stand as it is. In this embodiment, from the viewpoint of enhancing the integrity of the thinned wood 3A, 3A, ..., the rope is configured to be inserted through the upper part and the lower part of the side face of the thinned wood 3A. Not limited to this, it may be inserted into one or more side surfaces of the thinned material 3A. In addition, it is preferable that the thinning material 3A is subjected to antiseptic treatment.

  As the net member 3B, a metal lath, punching metal, or other known wire nets can be used, and the net member 3B is fixed to the thinning material 3A by staples such as clasps, insulation locks, strings, or the like. The net member 3B only needs to be attached to at least the head side of the disposed thinning material 3A, but may also be attached to the head side.

  Instead of forming the through hole 30 to support the thinning material 3A, as shown in FIG. 4, a sandwiching member 8 that sandwiches and supports the side surface of the thinning material 3A can also be used. Although various forms can be considered as the holding member 8, the form shown in FIG. 4 is attached to the plate 8A, the U bolt 8B that sandwiches the thinned material 3A integrally with the plate 8A, and the plate 8A. And U bolts 8C and 8C that can penetrate the rope 4.

  The plate 8A has through-holes 80, 80. U-bolts 8B are passed through the through-holes 80, 80, and the plates 8A and U-bolts 8B are connected by fasteners 8D, 8D such as bolts and nuts. Can be fixed. The through hole 80 is formed so that U bolts of various sizes can be fixed depending on the thickness of the thinned material 3A. In addition, a U-bolt that allows the cord 4 to pass through is attached to the plate 8 </ b> A, whereby the thinned material 3 </ b> A is suspended by the cord 4. The net member 3B may be fixed to the surface of the plate 8A with screws or the like. The plate 8A may be a flat plate or a curved plate so that the thinned material 3A can be easily held. Moreover, you may attach the backplate 81 to the part contact | abutted to the thinning material 3A to the U volt | bolt 8B.

  Thus, since it is not necessary to provide a through-hole etc. with respect to the thinned material, construction labor can be reduced and the decay resistance of the thinned material can be improved.

It is a general-view figure for demonstrating the condition which dams the falling rock etc. using the guard according to this invention. It is a general-view figure of a protection fence. FIG. It is a perspective view of a holding member.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Guard fence, 2 ... Rope support member, 2A ... Engagement part, 2B ... Strut part, 3 ... Rail main body, 3A ... Thinning material, 3B ... Net member, 4 ... Rope, 5 ... Rope, 6 ... Anchor member, 7 ... Turnbuckle, 8 ... Holding member, 8A ... Plate, 8B ... U bolt, 8C ... U bolt, 20 ... Back plate, 21a, 21b ... Flange 22, 22 ... Fastener, 23 ... Annular part , 24 ... nut, 30 ... through hole, 80 ... through hole, 81 ... back plate, W ... standing tree.

Claims (6)

It is a protective fence formed by laying a rope on each of the independent rope support members that are separated by a predetermined interval and suspending the fence body on this rope,
The fence body includes a plurality of thinnings disposed at a predetermined interval, and a net member attached across these thinnings,
The trunk supporting member fixed to the ground is configured so that the trunk of the standing tree is piercing,
A protective fence characterized by that.   The protective fence according to claim 1, wherein the rope is constructed on an upper part and a lower part of the rope support member, respectively, and is configured to suspend the upper part and the lower part of the fence body.   The protective fence according to claim 1 or 2, wherein a pinching member that can be supported by sandwiching the thinning material is attached to the thinned material, and the rope is suspended from the pinching member.   The rope support member includes an engaging portion that allows a trunk of a tree to pass through and is connected to the rope, and a support portion that supports the engaging portion and is fixed to the ground. The protective fence according to any one of claims 1 to 3.   The protective fence according to claim 4, wherein the engaging portion is configured to receive a tensile force from an anchor member penetrating into the ground so as to be suspended from a tensile force received from a rope that suspends the fence main body. The engaging portion includes a pair of half-cylindrical back plates having flanges at both ends,
These back plates are connected to form a cylindrical body, and the trunk of the tree is loosened in this cylindrical body.
6. The protective fence according to claim 4, wherein the pillar portion penetrates an annular portion formed in the back plate, and the annular portion is locked to the pillar portion via a fastening member.

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