JP2023086261A - Planted tree support device and falling prevention method - Google Patents

Abstract

To provide a planted tree support device and a falling prevention method, capable of preventing falling of a planted tree and damage to a trunk caused by strong wind.SOLUTION: A device 10 for supporting a planted tree 14 comprises: an underground frame body 16 which surrounds a root ball 24 of the planted tree 14 and is embedded in the ground around the root ball; a plurality of columns 18 which is coupled to the underground frame body 16 and erected around the planted tree 14; support members 20 which are provided on top end parts of the columns 18 and are brought into contact with a trunk 30 of the planted tree 14; and coupling means 22 which couples adjacent support members 20 adjacent in a circumferential direction of the planted tree 14 so as to be fastened and loosened freely.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supporting device for planted trees installed on artificial ground, for example, and a fall prevention method.

BACKGROUND ART Conventionally, artificial ground used for rooftop greening and the like has been known. The artificial ground has a low load bearing capacity, and the specific gravity of the soil and the thickness (depth) of the planting base soil that can be used for greening are limited. When planting short plants, less soil thickness is required. However, when plants are used on these artificial grounds, not only is it not possible to secure enough depth to bury the root ball, but the soil is lightweight, which contributes to the prevention of overturning when the wind hits the trees. The roots do not reach the roots, and unlike general plants on the ground, they easily topple over.

Therefore, conventionally, when tall trees are planted in these places, measures have been taken to prevent the overturning of these trees by installing windbreak posts such as underground posts (see, for example, Patent Documents 1 and 2). In addition, Patent Document 1 is composed of an underground frame that surrounds the root ball of a tree and is buried in the ground around it, and a plurality of posts that are erected around the tree. The ends of the horizontal member are connected to each other, the lower end of the support is swingably connected to the horizontal member, and the upper end of the support is configured to be able to support the trunk of the tree through the crosspiece. It is a thing. Further, Patent Document 2 discloses a floorboard, four shaped steel members fixedly installed on the floorboard in a cross shape radially from the center of the floorboard, and a ring-shaped support member that is wrapped around the trunk of a tree and tightly bound. , one end of which is attached to the tip of the shape steel material, and the other end of which is attached so as to abut on the support member. It is a thing.

Patent No. 5975278 publication JP-A-2005-143381

However, as in the conventional patent document 1 mentioned above, if a crossbar is attached to the trunk of a tree with a palm rope or the like, and the crossbar is connected and supported by a plurality of supports, twisting occurs during strong winds and the like. There was a risk that the joint with the crosspiece would break. In addition, once the trunk of the tree is tied tightly with a hemp palm rope, etc., it is difficult to re-tie it later according to the growth of the tree. In addition, as in Patent Document 2, when the fixing strength of the ring-shaped support member that is wrapped around the stem of the tree and tightly bound is high, there is a risk that the tree will bend at the upper end of the support member during strong winds. .

Therefore, the inventor of the present invention thought that a certain degree of bending and flexibility would be important factors for the connecting portion between the tree and the support, and conducted intensive studies, resulting in the following invention.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a support device for planted trees and a fall prevention method capable of preventing overturning of planted trees and damage to tree trunks due to strong winds. .

In order to solve the above-described problems and achieve the object, a planted tree support device according to the present invention is a device for supporting a planted tree, which surrounds the root ball of the planted tree. An underground frame buried in the surrounding ground, a plurality of posts connected to the underground frame and erected around the planted trees, and a planting provided at the upper end of the post It is characterized by comprising a supporting member arranged in contact with the trunk of a tree, and connecting means for connecting the supporting members adjacent to each other in the circumferential direction of the planted tree so that they can be tightened and loosened.

Further, according to another planted tree support device according to the present invention, in the above-described invention, the connection means includes engagement grooves or engagement holes provided on both sides in the circumferential direction of the support member and supporting members adjacent in the circumferential direction. It is characterized by comprising engaging means for engaging the engaging grooves or the engaging holes of the members so that they can be tightened and loosened.

Another planted tree support device according to the present invention is characterized in that, in the above-described invention, the underground frame is installed on a drainage mat installed inside the artificial ground.

A planted tree overturning prevention method according to the present invention is characterized in that the planted tree is prevented from overturning by using the planted tree support device described above.

According to the support device for a planted tree according to the present invention, it is a device for supporting a planted tree to be planted, and is an underground frame that surrounds the root ball of the planted tree and is buried in the ground around it. a body, a plurality of pillars connected to the underground frame and erected around the planted tree, and a support member provided at the upper end of the pillar and placed in contact with the trunk of the planted tree. Furthermore, since it is provided with connecting means for connecting the support members adjacent to each other in the circumferential direction of the planted trees so that they can be tightened and loosened, it is possible to prevent the overturning of the planted trees and damage to the tree trunks due to strong winds.

Further, according to another planted tree support device according to the present invention, the connection means includes engagement grooves or engagement holes provided on both sides of the support member in the circumferential direction and engagement between the support members adjacent in the circumferential direction. Engagement means for tightening and loosening engagement between the matching grooves or the engagement holes is included, so that the degree of fastening by the coupling means can be easily changed by the engagement means according to the growth of the planted trees. It has the effect of being able to

Further, according to another planted tree support device according to the present invention, since the underground frame is installed on the drainage mat installed inside the artificial ground, the planted tree is placed on the artificial ground. It has the effect of being able to

Further, according to the planted tree overturning prevention method according to the present invention, the above-described planted tree support device is used to prevent the planted tree from overturning. There is an effect that it can be prevented.

FIG. 1 is a schematic diagram showing an embodiment of a planted tree support device and overturn prevention method according to the present invention. FIG. 2 is a perspective view of a main part of this embodiment. FIG. 3 is a diagram showing the results of lodging experiments of trees.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a support device for planted trees and a fall prevention method according to the present invention will be described in detail below with reference to the drawings. In addition, this invention is not limited by this embodiment.

As shown in FIG. 1, a planted tree support device 10 according to an embodiment of the present invention is a device for supporting a planted tree 14 planted on an artificial ground 12, and includes an underground frame body. 16 , four (plurality of) struts 18 , a support member 20 , and connecting means 22 .

The underground frame 16 surrounds the root ball 24 of the planted tree 14 and is buried in the surrounding ground (artificial ground 12). The underground frame 16 is composed of four bars 26 arranged in a square shape (quadrangular shape) in a plan view, and binding members 28 for binding the ends of the bars 26 together. The bar 26 can be made of, for example, a log. The binding member 28 can be configured using, for example, clamps, metal bands, or the like.

This underground frame 16 is desirably installed on a drainage mat or the like installed on a slab surface (not shown) inside the artificial ground 12 . If the strength of the material (for example, foamed resin) constituting the drainage mat is low, a plate-shaped pressure distribution plate is placed between the drainage mat and the rectangular corners of the underground frame 16 where stress is concentrated. may be set. By doing so, it is possible to prevent damage due to compression of the material forming the drainage mat. The fixing force of the underground frame 16 depends on the soil on the artificial ground 12 loaded on it, but when artificial lightweight soil with a low specific gravity is used, the higher the water content, the higher the fluidity of the soil. Therefore, the soil in the vicinity of the underground frame 16 is layered with sandbags 40 (sandbag-filled soil) filled with artificial lightweight soil that does not hinder the entry of the roots of the trees 14, thereby reducing the fluidity and reducing the bottom bearing capacity. It is desirable to take measures for

The support 18 is a rod member that is connected to the underground frame 16 and erected around the planted tree 14 . The pillars 18 are arranged at positions corresponding to the ridgelines of the regular quadrangular pyramid, and the underground frame 16 is arranged at the bottom of the quadrangular pyramid. The lower end of the post 18 is tied with a tie member 28 to a bar 26 near the top of the square of the underground frame 16 . The upper ends of the supports 18 are arranged near the same height so as to surround the trunk 30 of the tree 14 and are connected to each other by connecting means 22 via the supporting member 20 . The bar material forming the pillars 18 can be made of, for example, a log. The binding member 28 used with the underground frame 16 can be configured using, for example, clamps, metal bands, or the like.

The support member 20 is provided at the upper end of the support 18 and placed in contact with the trunk 30 of the planted tree 14 . As shown in FIG. 2, this support member 20 is constructed using a metal sheath tube 32 into which the upper ends of the struts 18 are inserted. A connection portion 34 is formed on a surface of the upper end of the sheath pipe 32 facing the tree trunk 30 so as to abut on the surface of the tree trunk 30 in the horizontal direction. The joint portion 34 has a curved portion along the surface of the tree trunk 30 . Therefore, the sleeve pipe 32 does not have to be a straight pipe, and it is preferable that the upper portion has a tapered portion for the joint portion 34 . In order to avoid friction between the joint portion 34 and the skin of the tree 14 and to prevent damage to the tree trunk 30, a cushioning material such as palm, cedar bark, or resin sheet is placed between the joint portion 34 and the tree trunk 30. It is desirable to insert lumber. In addition, it is desirable that the cushioning material is not slippery.

The connecting means 22 connects the supporting members 20 adjacent to each other in the circumferential direction of the planted tree 14 so that they can be tightened and loosened. As shown in FIG. 2, the connecting means 22 are formed by engaging holes 36 provided on both sides of the joint portion 34 in the circumferential direction and engaging holes 36 of the joint portions 34 of the support members 20 adjacent in the circumferential direction. and a band 38 (engagement means) for tightenably and loosely engaging the . The band 38 is made of fiber and has a strip shape. By tightening the band 38 passed through the engagement hole 36, the support member 20 and the tree trunk 30 can be tightly bound. This tightening can be easily loosened as the tree 14 grows. Therefore, the degree of fastening by the connecting means 22 can be easily changed by the band 38 according to the growth of the planted trees 14 . A groove-shaped engagement groove may be formed instead of the engagement hole 36 described above. Also, instead of using the band 38 as the engaging means, bolts and nuts, wires, strings, ropes, etc. may be used.

An example of a method of assembling the support device 10 will be described. First, the underground frame 16 is assembled around the root ball 24 of the planted tree 14 . Subsequently, the lower ends of the four supports 18 are attached to the underground frame 16 and the upper ends are aligned with the tree trunk 30 . Subsequently, the supporting members 20 at the upper ends of the pillars 18 are connected by connecting means 22 to prevent them from loosening, and to provide a structure that cushions the tree trunk 30 . By doing so, the support device 10 can be easily assembled to the planted tree 12 .

According to the present embodiment, the upper end of the post 18 is placed in contact with the tree trunk 30 via the joint portion 34 of the support member 20, and the support members 20 adjacent in the circumferential direction are fastened by the connecting means 22. Loosely connected. As a result, the support 18 and the planted tree 12 can be fixed with a certain degree of flexibility, and the overturn of the planted tree 12 and damage to the tree trunk 30 due to strong winds can be prevented. In addition, conventionally, if the tree trunk is fixed using a hemp rope or the like and crossbars, it is difficult to re-tie it later according to the growth of the tree. However, according to this embodiment, construction can be performed more easily than with this conventional method. Further, according to the present embodiment, even a non-specialist such as a greening company can easily change the fastening degree of the connecting means 22 with the band 38 according to the growth of the planted trees 12 .

FIG. 3 shows the results of a lodging experiment in which the relationship between the wind speed and the inclination angle of the trees was investigated by applying a side wind to the planted trees set up in the vertical direction. The present embodiment corresponds to a case where a planted tree is supported by the support device 10 described above, and the comparative example corresponds to a case where a planted tree is supported by a support device such as that disclosed in Patent Document 1 described above. According to this figure, compared to the comparative example, the present embodiment can hold the tree without overturning even if it receives a tension assuming a stronger wind.

In the above-described embodiment, the underground frame 16 has been described as an example of a square shape, but the present invention is not limited to this, and the frame may be of any shape. Even in this way, the same effects as those described above can be obtained. Moreover, although the case where four pillars 18 are used has been described as an example, the present invention is not limited to this, and a number other than four may be used. In this case, three or more struts 18 may be used to form other pyramid shapes. Even in this way, the same effects as those described above can be obtained.

INDUSTRIAL APPLICABILITY As described above, according to the planted tree support device according to the present invention, the planted tree is a device for supporting the planted tree, and the root ball of the planted tree is surrounded and placed in the surrounding ground. An underground frame to be buried, a plurality of posts connected to the underground frame and erected around the planted trees, and provided at the upper ends of the posts and in contact with the trunks of the planted trees. Since the planted tree includes supporting members and connecting means for tightening and loosening the support members adjacent to each other in the circumferential direction of the planted trees, it is possible to prevent overturning of the planted trees and damage to the tree trunks due to strong winds. .

Further, according to another planted tree support device according to the present invention, the connection means includes engagement grooves or engagement holes provided on both sides of the support member in the circumferential direction and engagement between the support members adjacent in the circumferential direction. Engagement means for tightening and loosening engagement between the matching grooves or the engagement holes is included, so that the degree of fastening by the coupling means can be easily changed by the engagement means according to the growth of the planted trees. can be done.

Further, according to another planted tree support device according to the present invention, since the underground frame is installed on the drainage mat installed inside the artificial ground, the planted tree is placed on the artificial ground. be able to.

Further, according to the planted tree overturning prevention method according to the present invention, the above-described planted tree support device is used to prevent the planted tree from overturning. can be prevented.

INDUSTRIAL APPLICABILITY As described above, the planted tree support device and overturning prevention method according to the present invention are useful for planted trees planted on artificial ground or the like. suitable for

REFERENCE SIGNS LIST 10 planted tree support device 12 artificial ground 14 planted tree 16 underground frame 18 post 20 support member 22 connecting means 24 root ball 26 bar 28 binding member 30 tree trunk 32 sheath pipe 34 joint 36 engagement hole 38 band (engagement means)

Claims (4)

A device for supporting planted trees, comprising:
An underground frame surrounding a root ball of a planted tree and buried in the surrounding ground, a plurality of posts connected to the underground frame and erected around the planted tree, and upper ends of the posts and a connecting means for connecting the support members adjacent to each other in the circumferential direction of the planted tree so that they can be tightened and loosened. Support device for trees. The connecting means is an engaging means that engages the engaging grooves or engaging holes provided on both sides in the circumferential direction of the supporting member and the engaging grooves or engaging holes of the supporting members adjacent in the circumferential direction so that they can be tightened and loosened. 2. The planted tree support device according to claim 1, comprising: 3. The planted tree support device according to claim 1, wherein the underground frame is installed on a drainage mat installed inside the artificial ground. A method for preventing overturning of a planted tree, comprising preventing overturning of a planted tree by using the planted tree support device according to any one of claims 1 to 3.

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