JP7179287B2 - Connecting structure for falling tree prevention device and falling tree prevention method - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure for falling tree prevention devices and a method for preventing falling trees, and more particularly, a connecting structure for falling tree prevention devices that is buried in the soil so that the roots of a planted tree are entwined as it grows, and the same. It relates to a fallen tree prevention method using.

A structure for embedding in soil and fixing trees to the ground is disclosed in US Pat. The structure consists of a plurality of modular elements having supporting legs, and the supporting legs of adjacent modular elements are connected by tubular bodies.

U.S. Publication No. 2013/0139433

The above-mentioned conventional structure can support trees by allowing the roots of trees to enter the modular elements. When the elements receive a large earth pressure, the modular elements cannot sufficiently absorb the earth pressure and may be deformed or damaged.

On the other hand, in recent years, the importance of the disaster prevention function of trees has been recognized again in order to reduce damage to residential land and agricultural land caused by natural disasters such as tsunamis and typhoons or man-made disasters, and there is a need to improve the rooting of trees. there is

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a connecting structure for falling tree prevention tools and a falling tree prevention method, which can strengthen the ground where trees are planted and reliably prevent falling trees.

The object of the present invention is a connecting structure of a plurality of falling tree prevention devices embedded in the soil so that the roots of the planted trees are entwined as they grow, wherein the respective falling tree prevention devices extend parallel to each other. It comprises at least one supporting part and an annular holding body supported by said supporting part, a plurality of said holding bodies being fixed at intervals along said supporting part, and a plurality of said falling tree prevention tools. are connected by a helical connecting member, and a plurality of said falling tree prevention tools are connected by attaching said connecting member around portions extending in the same direction of said respective holders arranged close to each other. This is achieved by the interlocking structure of the protector.

Further, the object of the present invention is a fallen tree prevention method using a plurality of falling tree prevention devices embedded in the soil so that the roots of the planted trees are entwined as they grow, wherein the respective falling tree prevention devices are connected to each other. It comprises three or more supporting portions extending in parallel, and an annular holding body supported by the supporting portion. A connection step of arranging the falling tree prevention device close to the ground and connecting it with a spiral connection member, a fixing step of fixing the connected falling tree prevention device to the ground with a pile member, and the fixed falling tree prevention device. and a planting step of planting trees in the vicinity of the falling tree prevention tool after burying the tree in the soil, and the connecting step brings the holders of any of the plurality of the falling tree prevention tools closer to each other. This is achieved by a falling tree prevention method in which the connecting members are mounted around the holding bodies by rotating the connecting members and advancing them along the portions extending in the same direction of the holding bodies .

Advantageous Effects of Invention According to the present invention, it is possible to provide a connecting structure for falling tree prevention tools and a falling tree prevention method capable of reinforcing the ground where trees are planted and reliably preventing trees from falling.

1 is a side view of a fallen tree prevention tool used in a connecting structure of a fallen tree prevention tool according to an embodiment of the present invention; FIG. Fig. 2 is a plan view of the falling tree prevention tool shown in Fig. 1; FIG. 3 is a side view showing a connection structure of the falling tree prevention tool shown in FIG. 1; FIG. 4 is a plan view of the connection structure of the falling tree prevention tool shown in FIG. 3 ; BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic process drawing of the fallen tree prevention method which concerns on one Embodiment of this invention. 6 is a schematic diagram of a tree supported by the falling tree prevention method shown in FIG. 5; FIG. FIG. 5 is a side view showing a connecting structure of a fallen tree prevention tool according to another embodiment of the present invention. FIG. 8 is a plan view showing a connecting structure of a fallen tree prevention tool according to still another embodiment of the present invention; It is a side view which shows the modification of a falling tree prevention tool. FIG. 10 is a plan view of the falling tree prevention tool shown in FIG. 9; It is a side view which shows the other modification of a falling tree prevention tool. FIG. 11 is a side view showing still another modification of the falling tree prevention tool; FIG. 5 is a schematic diagram for explaining a fallen tree prevention method according to another embodiment of the present invention; FIG. 10 is a schematic diagram for explaining a fallen tree prevention method according to still another embodiment of the present invention; FIG. 11 is a side view showing a connecting structure of a fallen tree prevention tool according to still another embodiment of the present invention;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a side view of a fallen tree preventive device used in a connecting structure of a fallen tree preventive device according to an embodiment of the present invention, and FIG. 2 is a plan view of the fallen tree preventive device shown in FIG. As shown in FIGS. 1 and 2, the falling tree prevention tool 1 includes four vertical members 2 and two holders 4 supported by the vertical members 2, and is formed into a cube shape as a whole. .

The vertical member 2 is a solid rod-shaped or hollow cylindrical member made of metal, resin, or the like, and is made of a straight rod-shaped reinforcing bar in this embodiment. Each vertical member 2 is arranged at each corner of a rectangular shape in a plan view so as to extend parallel to each other, and constitutes a supporting portion that supports the holding body 4 in its entirety in the longitudinal direction. The surface of the vertical members 2 preferably has irregularities such as ribs and knots of reinforcing bars, thereby increasing the surface area and enhancing the adhesion to the soil when buried.

The holder 4 is an annular member made of metal, resin, or the like. The hook portions 4a and 4b at both ends are engaged with the longitudinal member 2. As shown in FIG. It is preferable that the surface of the holder 4 is also formed with irregularities in the same manner as the vertical member 2 .

The two holders 4, 4 are arranged parallel to each other with a gap along the vertical member 2, and are fixed to the vertical member 2 by binding tools 6 such as metal wires. The method of fixing the holder 4 to the vertical members 2 is not particularly limited, and may be performed by clamping, caulking a metal pipe, welding, or the like, for example.

3 and 4 are a side view and a plan view, respectively, showing the connecting structure of the falling tree prevention tool 1 shown in FIG. As shown in FIGS. 3 and 4, the connecting structure 100 of the falling tree prevention tool 1 is configured by connecting a plurality of falling tree prevention tools 1, 1 arranged close to each other with a plurality of connecting members 8, 8. . The connecting member 8 has a shape in which a rod material is spirally wound, and for example, a spiral muscle can be preferably used.

Falling tree prevention tools 1, 1 are arranged so that vertical members 2, 2 extend parallel to each other on both sides of one side of holders 4, 4 adjacent to each other, and each connecting member 8 connects these vertical It is mounted so as to surround the materials 2, 2. - 特許庁It is preferable that a slight gap (for example, about 0.5 to 3 cm) is formed between the support members 2, 2 and the connecting member 8. For example, the maximum distance between the outer circumferences of the supports 2, 2 is 10 cm. , it is preferable to set the inner diameter of the spiral of the connecting member 8 to 12 cm. By configuring the connecting structure 100 in this way, even if ground displacement occurs after burying in the soil, positional deviation between the falling tree prevention tools 1, 1 in any direction can be prevented by connecting the support members 2, 2. Since it can be absorbed by the gap with the member 8, it is possible to flexibly cope with ground displacement while reliably maintaining the combined state of the falling tree prevention tools 1, 1. - 特許庁However, since the connecting member 8 is elastically deformable, the connecting member 8 may contact both the supports 2 , 2 . The spiral pitch of the connecting member 8 may be appropriately set according to the spacing between the upper and lower holding bodies 4, 4 so as not to interfere with the upper and lower holding bodies 4, 4 at the same time.

FIG. 5 is a schematic process diagram for explaining a method for preventing planted trees from falling according to an embodiment of the present invention. When many trees are planted in a wide planting area such as when planting a disaster prevention forest, first, as shown in FIG. After forming 12, a plurality of falling tree prevention tools 1 are arranged close to each other at the bottom of the planting hole 12 so that the vertical members 2 are oriented vertically. Although the size of each fallen tree prevention device 1 is not particularly limited, for example, it can be a cube with each side of about 1 m. Next, the connecting member 8 is advanced in the direction of the arrow while being rotated along the longitudinal members 2, 2 of the falling tree prevention devices 1, 1, which extend parallel to each other, and is connected around the longitudinal members 2, 2. By mounting the member 8, the falling tree prevention tools 1, 1 are connected (connection step).

Next, as shown in FIG. 5B, the connecting structure 100 of the falling tree prevention tool 1 obtained in the connecting step is fixed to the ground (fixing step). That is, a plurality of pile members 20 having hook-shaped locking portions 22 at the top are driven into the bottom of the planting hole 12 as indicated by arrows, and the respective locking portions 22 are attached to the holders 4 of the respective falling tree prevention tools 1. , the falling tree prevention tool 1 is fixed to the ground at the bottom of the planting hole 12. - 特許庁The pile member 20 is made of, for example, reinforcing bars, and is preferably driven into the soil at a depth of about 0.5 to 2.5 m from the bottom of the planting hole 12 so that the falling tree prevention tool 1 can be securely fixed. . In this embodiment, the pile member 20 is driven into the outside of the connecting member 8, but the pile member 20 may be driven into the connecting member 8 along the spiral axis. Since soil enters the inside of the connecting member 8 as described later, by arranging the pile member 20 inside the connecting member 8, the pile member 20 can be held from the surroundings, and the connecting structure 100 can be reliably connected. can be fixed. It is not always necessary to provide the hook-shaped locking portion 22. For example, a straight line or the like can be used, and the falling tree prevention tool 1 can be fixed via the buried soil.

Then, as shown in FIG. 5C, after the connecting structure 100 is buried with soil 24 such as excavated soil or improved soil, a plurality of saplings of trees 30 are planted above the connecting structure 100 (planting). step). As the planted trees 30 grow, their roots 32 seek moisture and nutrients and spread out into the soil. Therefore, as shown in FIG. A root 32 of a tree 30 can be passed between 4 and 4 and entangled with the holder 4. - 特許庁The root of the tree 30 not only engages with the falling tree prevention tool 1 arranged directly under it, but also engages with the falling tree prevention tool 1 adjacent thereto and the spiral connecting member 8, thereby preventing falling trees. effect is enhanced. The trees 30 are preferably planted directly above each of the falling tree prevention tools 1, but they may be planted in the vicinity of the falling tree prevention tools 1, and the trees 30 may be planted diagonally above or to the left and right of the falling tree prevention tools 1. good.

According to the fallen tree prevention method described above, the connection structure 100 of the fallen tree prevention tool 1 is buried in the soil so as to be engaged with the growth of the roots of the seedling, thereby strengthening the ground and making the root system of the tree 30 mainly. Since the tip side can be entwined with the falling tree prevention tool 1, a large number of growing or branched roots (for example, horizontal roots, drooping roots, etc.) are held by the falling tree prevention tool 1 to firmly support the tree 30. can reliably prevent falling trees. In addition, even if a sediment disaster, river erosion, or the like occurs, the soil is easily retained inside the falling tree prevention tool 1, so that it plays a role in strengthening the ground.

Furthermore, in the connection structure 100 of the falling tree prevention device 1, since the connection of the plurality of falling tree prevention devices 1 is performed by the spiral connection member 8, even if ground displacement occurs due to an earthquake or the like, each falling tree prevention device 1 The connecting member 8 can absorb the positional deviation between them, and a good connecting state can be maintained while preventing the falling tree prevention tools 1 from being damaged. As a result, it is possible to easily and reliably strengthen the ground and prevent trees from falling over a wide area using a large number of falling tree prevention tools 1 .

If the depth from the ground 10 to the holding body 4 on the upper side of the falling tree prevention tool 1 is too large, it becomes difficult for the horizontal roots extending along the ground surface to engage with the holding body 4. If it is too small, the soil surface is eroded. For example, the depth is preferably about 30 cm, and most of the fallen tree prevention tool 1 is preferably arranged at a depth of about 30 to 130 cm. The type of tree 30 to be planted is not particularly limited, but it is preferable that the tree 30 has a strong root 32 and a large spread in the depth direction. etc., and the falling tree prevention tool 1 can be suitably used for preventing fallen trees in disaster prevention forests such as windbreak forests and tide forests (windbreak forests, tide forests, sand forests, fire forests, etc.). When a plurality of trees 30 are planted, the trees 30 may be of the same kind, but it is preferable to use a plurality of kinds of trees 30 having different root systems. Even if the tree 30 is a single tree, a good reinforcing effect can be obtained by the falling tree prevention tool 1, but by using a plurality of trees 30 in combination, the function as a disaster prevention forest can be exhibited more reliably. can be done. The tree 30 to be planted is preferably a native species native to the land. The trees 30 to be planted may be coniferous trees such as Japanese cedar, Japanese cypress, and Japanese larch.

Although one embodiment of the present invention has been described in detail above, specific aspects of the present invention are not limited to the above embodiment. For example, in the connecting structure 100 of the present embodiment, the fallen tree prevention tools 1, 1 arranged adjacently are connected by a plurality of connecting members 8. good. It is also possible to connect three or more falling tree prevention devices 1 with a single connecting member 8. For example, the falling tree prevention devices 1 are arranged in a matrix and four vertical members corresponding to the intersections of the matrix are arranged. A connecting member 8 can be mounted around 2 .

In addition, the connecting member 8 of the present embodiment is mounted around the vertical members 2, 2 of the plurality of falling tree prevention tools 1, 1, but the connecting member 8 is mounted around the portions of the respective holders 4, 4 extending in the same direction. may be worn on For example, as shown in the side view of FIG. 7, a plurality of falling tree prevention tools 1, 1 are arranged so that one side of the holders 4, 4 extends along the same straight line, and the spiral shaft is arranged along this straight line. A connecting member 8 can be fitted around the holders 4,4. Alternatively, as shown in the plan view of FIG. 8, a plurality of falling tree prevention tools 1, 1 are arranged so that one side of the holders 4, 4 are close to each other and parallel to each other, and are connected around this parallel portion. A member 8 can be attached.

Further, the fallen tree prevention tool 1 can also have various configurations other than the configuration of the present embodiment. For example, in the present embodiment, the falling tree prevention device 1 is formed in a cubic shape as a whole, but the shape is not particularly limited. It may have a long rectangular parallelepiped shape.

In the falling tree prevention device 1 of the present embodiment, the number of vertical members 2 constituting the supporting portion for supporting the holding body 4 is four, but three or more are used so that the ring-shaped holding body 4 can be supported. I wish I had. For example, when the holding body 4 has a polygonal shape of a triangle or more, it is preferable to dispose the vertical member 2 at each vertex of the polygonal shape. Moreover, when the holder 4 has a circular or elliptical shape, it is preferable to arrange an appropriate number of vertical members 2 at regular intervals along the circumferential direction of the holder 4 .

In addition, in this embodiment, by arranging the two holders 4 along the vertical member 2 with a gap therebetween, the roots 32 of the tree 30 can pass between them, and the respective holders 4 engages roots extending at different depths to provide reliable support for the tree 30 . The number of holders 4 may be three or more, and the number and spacing of the holders 4 are appropriately set in consideration of the thickness of the roots 32 of the tree 30 to be planted, the depth at which the roots 32 grow, and the like. preferably.

In addition, the supporting portion for supporting the holding body 4 in the falling tree prevention tool 1 can be formed by a material other than the straight rod-like upright member 2 as in the present embodiment. For example, as shown in a side view and a plan view of FIGS. 9 and 10, respectively, the falling tree prevention tool 1 is configured with both side portions extending parallel to each other on both sides of a U-shaped curved member 40 as support portions 42, 42, respectively. You can also The falling tree prevention device 1 shown in FIGS. 9 and 10 has four curved members 40 arranged parallel to each other at regular intervals, and four other curved members 40 arranged perpendicular to each other at regular intervals parallel to each other. By doing so, 16 supporting portions 42 are formed from the eight curved members 40 . In this way, by forming the support portion 42 from both sides of the plurality of U-shaped curved members 40, the strength of the falling tree prevention device 1 can be ensured, and the tree can be supported more reliably. The bending member 40 may be part of a frame-shaped member.

Each supporting portion 42 supports three holders 4 each formed of an annular body having a square shape in a plan view. An auxiliary body 50 is supported on the top of each holding body 4 . The auxiliary body 50 is formed of an annular body that is rectangular in plan view, and is arranged inside the holding body 4 (that is, so as not to protrude outside the holding body 4 in plan view). The opening area of the annular interior is formed to be smaller than the opening area of the annular interior of the holding body 4 . The auxiliary body 50 is fixed to both the support part 42 and the holding body 4 using a binding tool (not shown in FIGS. 9 and 10) as in the configuration shown in FIG. 1 and the like.

According to the falling tree prevention tool 1 shown in FIGS. 9 and 10, by providing the auxiliary body 50 in addition to the holding body 4, the roots of the growing tree can easily get entangled in the falling tree prevention tool 1, so that the tree can be supported more reliably. can do. The auxiliary bodies 50 are vertically adjacent to each other in different orientations of the rectangles in plan view, thereby making it easier to support the roots of the tree with the upper and lower auxiliary bodies 50 . As the size of the falling tree prevention tool 1 increases, the number of auxiliary bodies 50 arranged above and below the holding body 4 may be further increased to increase the density of the falling tree prevention tool 1 and increase the contact area with the soil. , can enhance the effect of ground strengthening and falling tree prevention. Auxiliary bodies may be spiral as well as annular. As shown in FIG. The falling tree prevention device 1 can also be constructed by arranging it so that the whole or a main part thereof does not protrude outside the holding body 4 in view.

The place where the connecting structure 100 of the falling tree prevention device 1 is installed is not limited to the ground at the bottom of the planting hole 12 as shown in FIG. , ground raising work, river bank protection work, growing ground preparation work, etc., the connection structure 100 can be used.

When the connecting structure of the falling tree prevention tool of the present invention is buried in the slope of embankment, the falling tree prevention tool 1' having the configuration shown in FIG. 12 can be preferably used. This falling tree prevention device 1' has two rectangular frame-shaped holders 4a and 4b with different sizes arranged in parallel with each other with a space therebetween. are supported by support portions 42a, 42b, and 42c of three frame-like members 40a, 40b, and 40c perpendicular to the . Further, a triangular ring-shaped auxiliary body 44 and a rectangular ring-shaped auxiliary body 46 are inserted through the two holders 4a and 4b so as to support them from the inside. The triangular ring-shaped auxiliary body 44 is formed in the shape of a right triangle and arranged so as to be orthogonal to both the holding bodies 4a, 4b and the frame-shaped members 40a, 40b, 40c. Further, the rectangular ring-shaped auxiliary body 46 is arranged so as to be inclined with respect to the holding bodies 4a and 4b. The triangular ring-shaped auxiliary body 44 has an insertion portion 44a that protrudes downward. By stabilizing the pile member 20, it is possible to easily fix the pile member 20 by hammering.

As shown in FIG. 13, the falling tree prevention tool 1' shown in FIG. After that, it can be fixed to the ground surface (ground) 10 by the stake member 20 . When the falling tree prevention device 1' is buried in the embankment 26, the holders 4a and 4b having different sizes can be arranged along the inclination of the slopes 26a and 26b of the embankment 26. , the foundation of the embankment 26 can be strengthened, and the trees 30 planted on the slopes 26a and 26b can be reliably prevented from falling. In this embodiment, there are two holders 4a and 4b included in the falling tree prevention tool 1', but three or more holders may be arranged so that the sizes thereof change stepwise. When coniferous trees are planted on the inclined slopes 26a and 26b, it is preferable to plant evergreen broadleaf trees below the slopes 26a and 26b. The falling tree prevention device 1' shown in FIG. 12 can be combined with the falling tree prevention device 1 shown in FIG. can.

Further, as shown in FIG. 15, it is also possible to configure a connecting structure 100' by stacking a plurality of falling tree prevention tools 1 and 1' and connecting them with connecting members 8. FIG. The connecting member 8 shown in FIG. 15 is mounted around longitudinal members (supporting portions) arranged in parallel so as to extend vertically close to each other, but as shown in FIGS. 8 may be mounted around a portion of the holding body 4 extending in the same direction, or a combination thereof.

In a connecting structure 100' shown in FIG. The upper end of the pile member 20 is configured to enter inside the falling tree prevention tool 1, 1' on the second stage. The falling tree prevention tools 1, 1' on the second stage are configured so that the lower end of the engaged pile member 20' enters the interior of the falling tree prevention tools 1, 1' on the first stage. The length by which the upper end or lower end of the pile member 20, 20' enters into the falling tree prevention device 1, 1' is preferably 2/3 or more of the height of the falling tree prevention device 1, 1'. The piling members 20, 20' may be straight, but the piling members 20, 20', whose upper ends may be exposed to the outside, preferably have curved upper ends.

1 Falling tree prevention tool 2 Vertical member (supporting part)
4 holder 8 connection member 20 pile member 30 tree 32 root 40 curved member 42 support parts 44, 46 auxiliary bodies 50, 52 auxiliary body 100 connecting structure for falling tree prevention tool

Claims (2)

A connecting structure of a plurality of falling tree prevention devices embedded in soil so that the roots are entwined by the growth of planted trees,
Each of the falling tree prevention tools includes three or more supporting portions extending parallel to each other, and an annular holding body supported by the supporting portion. is fixed at
A plurality of falling tree prevention tools are connected by a spiral connecting member.,
A plurality of the falling tree prevention devices are connected by attaching the connecting member around portions extending in the same direction of the respective holders arranged close to each other. Connecting structure for falling tree prevention devices. A falling tree prevention method using a plurality of falling tree prevention tools embedded in the soil so that the roots are entangled by the growth of the planted trees,
Each of the falling tree prevention tools includes three or more supporting portions extending parallel to each other, and an annular holding body supported by the supporting portion. is fixed at
a connecting step of arranging a plurality of the falling tree prevention tools close to the ground and connecting them with a spiral connecting member;
a fixing step of fixing the connected falling tree prevention device to the ground with a pile member;
and a planting step of planting trees in the vicinity of the falling tree prevention tool after burying the fixed falling tree prevention tool in the soil.,
In the connecting step, the holders of any of the plurality of falling tree prevention tools are arranged close to each other, and the connecting member is rotated to advance along the portions extending in the same direction of the holders. to mount the connecting member around the holding body by fall prevention method.

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