JP3995648B2 - Tree fall prevention device - Google Patents

Description

  The present invention relates to a tree fall prevention device that is used to prevent tilting or falling of a planted tree even in an environment exposed to strong winds such as a rooftop, and to keep the tree stably.

  In recent years, trees have been actively planted from the viewpoint of improving scenery and habitability, and various planting methods have been considered.

  For example, in order to plant trees outdoors, install a planting stabilizer at the bottom of the excavated planting hole so that it can withstand strong winds, place a root pot on the tree, and plant the root pot in the planting stabilizer. After tying to the ground, there is a method to backfill the soil in the excavated planting hole.

  At present, there are various known tree planting stabilization devices, which are usually composed of a pedestal formed by a metal frame, and a tightening strip such as a sling is placed with the root pot placed on the pedestal. It is hung and the root pot is tied to the base and fixed.

  In such a conventional technique, the fixing of the root pot to the pedestal relies exclusively on the fastening force of the tightening strip, so a winch or the like is attached to fasten the tightening strip. In a structure that relies solely on the fastening force, when a planted tree receives a strong wind such as a typhoon, a large external force of several tons centering on the root pot may occur.

  In such a case, the root pot may rotate on the pedestal in the soil due to slipping of the tightening strip, etc., not only preventing stable growth of the tree, but also the tree should tilt or fall over If you do, you will have to replant the trees, which will be very damaging.

  In view of this, Japanese Patent Application Laid-Open No. 14-027850 discloses a fall prevention device in a planting stabilization device that holds a root pot firmly and stably.

  The root pot placed on the pedestal by the locking means and the fastening force accumulating means for locking the tightening strip of the root basin part does not rotate on the pedestal even if an external force such as strong wind occurs. It can be held firmly and stably.

  However, by firmly holding the root pot on the pedestal, it is possible to prevent the root pot from rotating on the pedestal, but it is the branches and leaves that receive the external force due to the strongest wind etc. The moment due to the external force such as is concentrated on the trunk at the upper part of the root pot.

  In such a case, the tree trunk may be a tree that has grown to a thickness that can withstand external forces such as strong winds, but otherwise it may break at the trunk around the upper root pot.

  In view of this, Japanese Patent Application Laid-Open No. 07-023670 discloses a tree support device in which a tree trunk is supported from the side by a column and a tree planting method.

According to this, since the pillar is erected in parallel on the base on which the root pot is placed, the lower end of the pillar and the root basin are integrated via the base and are erected on the base. The support post is connected to the support ring, which is tied to the trunk of the tree with a rope, near the outer periphery of the tree trunk, so that the upper end of the support and the trunk of the tree are integrated via the support ring. Since the external force received by the strong wind or the like does not concentrate on the root pot of the tree or the trunk at the top of the root pot, the root pot does not rotate and the trunk at the top of the root pot does not break.
Japanese Patent Laid-Open No. 07-023670 JP-A-14-027850

  Damage such as rotation of root pots and tilting of trees due to strong winds as described above is particularly serious with respect to rooftop greening.

  In the case of rooftop greening, anchors or the like cannot be driven because it causes cracks in the floor and rain leaks on the top floor.

  In the invention of Japanese Patent Laid-Open No. 07-023670, the structure does not require the anchor to be driven for the purpose of reducing the labor required for planting, but the stability obtained by driving the anchor is very large.

  In other words, if it is a structure that does not drive anchors, it is necessary to make it a structure that can provide stability instead of anchors. In general, it depends on the weight of the base and floorboard, or the weight of soil piled on the floorboard. It is necessary to have a structure that can be stably held.

  However, because the soil laid on the roof is limited in terms of weight, light soil is generally used, so stability cannot be said to be sufficient, and in this case, a structure that can sufficiently obtain the weight of the soil Otherwise, the trees cannot be supported stably by strong winds such as typhoons, and may fall or fall over.

  In particular, the invention disclosed in Japanese Patent Application Laid-Open No. 07-023670 has a structure in which a root pot of a tree is placed on a base and is stably supported by the weight of the tree and the base, and the embankment is placed on a wide slab. However, it is not a structure that stably supports the soil weight.

  Further, since the tree is integrated by the base and the support, the external force applied to the tree by a strong wind or the like is applied to the entire tree including the base and the support.

  For this reason, when the external force due to strong winds such as typhoons is applied to the entire tree including the base and the support column in a state where the weight of the soil piled on the base cannot be obtained sufficiently, the entire tree together with the base It is expected that there will be a tilt or fall.

  Therefore, in order to prevent the base from falling or tilting, an iron floor is laid on the rooftop, and the root of the tree is tied to a rectangular frame fixed on the floor. There is also a conventional technique in which embankment is performed, the fall of the soil is prevented from falling, and bolts are fixed to the roof with a frame material protruding from the four corners of the frame.

  However, it cannot be easily implemented due to the complexity of the structure and damage to the rooftop floor caused by cracks and leakage at the bolt fixing portion.

  Thus, in the case of rooftop tree planting, it is extremely difficult to stably support trees so that they can withstand strong winds.

  Therefore, the present invention has been made in view of the above problems, and its purpose is to tilt a tree planted by a simple and strong structure even in an environment exposed to strong winds such as a rooftop. Another object of the present invention is to provide a tree fall prevention device that can stably support a tree without damaging the rooftop, preventing overturning, turning of a root pot, and the like.

  The present invention can solve the above-described problems by the following means.

  Claim 1 comprises a base plate for placing a root pot portion of a tree and fixing it by embankment, and a plurality of struts having one end attached to the base plate and supporting the other end of the tree in contact with the other end It is the fall prevention device of the tree characterized by being made.

  The laying board is laid directly on a floor surface such as a rooftop, and the stability is increased by the weight of soil piled on the laying board.

  The laying plate is a flat steel material, and may be a square shape or a round shape, having a size larger than that of the root pot and sufficient soil weight. The size has only an area.

  Further, it may be a single flat plate, or may be divided and arranged on the site, connected and integrated to be arranged.

  A plurality of the support columns are arranged so as to be inclined in the radial direction around the trunk of the tree, and are attached to the outer periphery of the floorboard.

  Further, the support column is installed so as to support the tree by bringing the upper end portion into contact with the trunk of the tree.

  The support described in Japanese Patent Application Laid-Open No. 07-023670 is configured to be supported on a tree trunk, but the present invention is installed with the support in contact with the trunk.

  Unlike a structure that simply supports the trunk of the tree by supporting it from the periphery of the trunk of the tree with multiple supports, it has excellent stability and high strength enough to withstand external forces such as strong winds. It can be set as a structure with.

  The number of struts should be changed as needed depending on the installation environment such as the size and location of the tree. The greater the number of struts that abut, the greater the stability of the tree and the strength to withstand strong winds such as typhoons.

  In addition, even if the strut has a small angle with the ground (near parallel to the ground) or a large angle with the ground (near upright with respect to the ground), it cannot support the trunk of the tree. Therefore, it is desirable to have an appropriate angle.

  In addition, it is desirable to support the trunk of the tree at an angle that does not interfere with the surroundings of the tree and takes into consideration the appearance problems.

  Therefore, the most suitable angle between the pillar and the ground is about 45 to 60 degrees, and it is not necessarily limited by the installation environment or the like, and all the pillars need not be the same angle.

  According to a second aspect of the present invention, there is provided an apparatus for preventing the fall of a tree, wherein a mold steel material is fixed to the floor plate and a column is attached to the mold steel material.

  It is preferable that the steel plate is installed and fixed on a floor plate and is configured radially from the center of the floor plate toward the outer periphery.

  Moreover, this type | mold steel material provides metal fittings, such as a clamp, in the front-end | tip part of the outer peripheral side of a flooring board, and attaches a support | pillar.

  The support column installed in contact with the trunk of the tree is fixed by a high-strength steel plate installed and fixed on the floor plate, thereby increasing the bending strength of the floor plate. That is, it is possible to prevent a problem that the outer peripheral portion of the floor board is bent and lifted by an external force such as a strong wind, and to stably support the tree.

  The present invention is a combination of a flat slab and a high-strength mold steel material. The mold steel material plays a role of firmly fixing a support column that prevents a tree from falling down, and the mold steel material is placed on the floor surface. The floor plate plays a role of firmly fixing, and by placing soil on the floor plate, stable installation on the floor surface can be realized by the weight of the soil.

  Many of the conventional technologies form a pedestal with a frame formed in a frame, but this frame is framed in a quadrilateral or cross-girder shape. It is a frame for fixing a root pot.

  Since it is difficult to bind and fix the root pot only with the floorboard, a pedestal with a frame is provided on the floorboard, and the root pot is fixed to the pedestal.

  However, the pedestal composed of the frame against the bending moment that occurs in the root bowl when subjected to external forces due to strong winds such as typhoons, even if it can support the root bowl, the frame is bent and distorted. There was a case. Therefore, in the present invention, a die steel material with increased strength is used.

  When the strength of the mold steel material is weak, the pillars installed in contact with the trunk of the tree are inclined with the inclination of the tree, and the tip part of the mold steel material to which the pillars are attached is lifted and bent. For this reason, a steel plate having a high strength by processing a flat steel material such as an L-shaped angle material having an L-shaped cross section, a channel material or a lip channel material having a U-shaped cross section, or the like is used.

  For example, even if it is a round bar or pipe etc., it can fully fulfill the role of fixing the root pot as a pedestal, but if it can not withstand external force due to strong winds such as typhoon, it is distorted or bent, Even the entire floor is distorted. Therefore, a U-shaped channel material or a lip channel material having as much strength as possible is preferable, but not limited thereto.

  The number of steel molds fixed on the floorboard can be changed in a timely manner depending on the installation environment, such as the size of the tree and the installation location.The more the steel, the greater the stability of supporting the tree, and the stronger the typhoon Can get enough strength to withstand.

  Here, the struts are always installed by being attached to the mold steel, and connect the lower end of the strut and the tip of the mold steel, but the mold steel need not necessarily be the same number as the struts. Alternatively, a larger number of mold steel members than the support may be installed and fixed for the purpose of simply increasing the strength of the floorboard.

  According to a third aspect of the present invention, there is provided a tree fall prevention device, wherein the mold steel material is extendable.

  The struts are installed in contact with the trunk at a height approximately in the center with respect to the height of the trees, and the angle between the struts and the ground is 45 to 60 degrees as much as possible for the reasons described above. Attach to the tip of the steel plate that is fixed on the top.

  It is necessary to change the position where the support comes into contact with the trunk in accordance with the height of the tree. The higher the position of the contacted stem, the farther the tip of the steel plate to which the support is attached is farther from the center of the floorboard. Become position.

  Therefore, the mold steel material can be adjusted so that it can be expanded and contracted in a timely manner so that the position of the tip portion can be freely changed according to the support column.

  In Japanese Patent Laid-Open No. 07-023670, the mounting member which is separate from the base is structured to be slidably fitted, but this is simply when placing the root pot on the base. An object of the present invention is to reduce the labor required for planting trees by enabling the attachment members to be attached so as not to get in the way.

  Therefore, as in the present invention, for the purpose of stably supporting the tree, it is not intended to be able to expand and contract in order to adjust the contact position with the support in accordance with the size of the tree. Since the range is short and it is not for strong wind countermeasures, it does not require special strength and does not need to be a steel mold.

  The range in which the steel mold can be expanded and contracted is such that the struts can abut at 45 to 60 degrees, so it is necessary to expand and contract to a length equivalent to the height of the trunk of the tree with which the strut abuts. Unlike the possible range, it is necessary to extend considerably in the outer circumferential direction.

  Thus, unlike the above publication, since the length to be expanded and contracted is large, it must be a strong steel sheet material, and a U-shaped channel material and a lip channel material having strength as much as possible are preferable.

  According to a fourth aspect of the present invention, a support member is provided on the outer periphery of the trunk portion of the tree, the support member and the base plate or the mold steel material are stretched by a plurality of wires, and the tree is fixed. The tree fall prevention device according to any one of claims 1 to 3.

  The support member tightens and winds the outer periphery of the trunk of the tree, and leather, a resin belt, or the like can be used.

  The support member may be a chemical fiber, elastic rubber, or the like as long as it is tightly wound around the trunk, and a chain or iron ring is fixed to the trunk by driving it. Anyway.

  Further, a hook or the like for fastening the wire is attached to the support member, and one end of the wire is hung on the hook, and the other end is attached to the floor plate or the steel plate and is stretched.

  The wire is arranged in the radial direction around the trunk of the tree, and is fixed to the tip of the steel plate that is installed and fixed on the floorboard.

  The struts are used when pressed against and abutting the trunk of the tree, whereas the wires are used by stretching the trunk of the tree from the surroundings. When using the wire, adjust the tensile force using a turnbuckle or the like.

  In addition, when multiple wires are provided, if the tensile force is biased in either direction, the tree will tilt, so it is necessary to stretch so that the moment in the horizontal direction centering on the trunk will cancel out at the trunk. Although it is good, in order to increase stability only in a specific direction, the number of wires may be increased or a wire may be arranged only in a specific direction so that a moment is intentionally generated in a specific direction.

  According to a fifth aspect of the present invention, there is provided a tree fall prevention device characterized in that an elastic member such as a coil spring is connected to the support column or the wire.

An elastic member such as a tension spring or a coil spring is interposed in the support column or the wire.
The elastic member may be interposed in a connecting portion when connecting a plurality of columns or wires, or may be interposed in a connecting portion with a trunk portion of a tree or an attachment portion with a mold steel material. Also good.

  In addition, the strut or wire abuts or stretches the shape steel material and the tree trunk to stably support the tree, but when a large external force is applied due to strong wind or the like, It is also conceivable that external force concentrates on the mounting portion and breaks. Therefore, as a safety measure, an external member is distributed to a specific location by interposing an elastic member such as a tension spring or a coil spring on the attachment part of the shape steel material or the trunk of the tree or the connecting part of a plurality of columns or wires. It prevents the external force from concentrating on and prevents damage to the support part or the mounting part of the wire, the base plate and the steel plate.

  In addition, since the external force applied to the entire tree can also be dispersed, it is possible to realize a more stable fall prevention device than holding the tree from the side by a support or a wire.

  The present invention has the following effects.

  1) Stable weight can be obtained by embedding on a high-strength steel sheet, without damaging the rooftop, and stability by supporting the trunk of the tree with multiple supports. Therefore, it is possible to realize a fall prevention device having a structure that can withstand an external force such as a strong wind.

  2) The struts are brought into contact with a high strength steel plate installed and fixed on the floorboard, whereby the strength of the floorboard can be increased, the strut can be firmly held, and the tree can be stably supported.

  3) Set the optimal support angle of the trunk according to the size of the tree by adjusting the shape steel material to expand and contract to an appropriate position according to the strut in contact with the trunk at the appropriate height of the tree This makes it possible to stably support trees.

  4) By providing a support member on the trunk, the strut can be brought into contact with the tree without damaging it, and can be reliably brought into contact with the trunk.

  5) The interstitial elastic member disperses the external force due to strong winds, etc., preventing the external force from concentrating on a specific location, avoiding damage to the pillars or wires, etc. Since it can disperse | distribute, it can not only hold a tree from the side with a support | pillar or a wire, but can implement | achieve a highly stable fall prevention apparatus.

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

  FIG. 1 is a plan view showing an embodiment of a tree fall prevention device according to the present invention. The present invention includes a floor plate 1, four shape steel members 2 fixedly installed in a cross shape in a radial direction from the center of the floor plate 1 on the floor plate 1, and a ring-shaped support that is tightly bound and fixed around a trunk of a tree The member 5 and one end are attached to the distal end portion 3 of the mold steel material 2, and the other end portion 4 is attached in contact with the support member 5, and is provided in a radial direction around the trunk portion. It is comprised with the support | pillar 6 of.

  The floor board 1 is laid on the floor of the roof and fixed by embankment. The floor plate 1 is a flat steel plate, which is composed of one square steel plate 1a and four trapezoidal steel plates 1b, 1c, 1d, and 1e. The trapezoidal steel plates 1b and 1c are arranged on four sides of the square steel plate 1a, respectively. 1d and 1e are arranged side by side, and the adjacent steel materials are connected and fixed with bolts.

  This floor board 1 does not necessarily need to be divided into several pieces, and may be a single large flat steel material, or may be further divided into a plurality of pieces so as to be portable.

  On the floor plate 1, four shape steel members 2 are installed and fixed in a cross shape in the radial direction from the center of the floor plate 1. The mold steel material 2 was a lip channel material. The mold steel material 2 is attached to be freely stretchable by inserting a lip channel 2b having a small width in one lip channel material 2a and fixing with a bolt or the like. In addition to the lip channel material, the mold steel material 2 may be an L-shaped angle material, a channel material having a U-shaped cross section, or the like as long as it is a strong strength steel material.

  FIG. 2 is a schematic sectional view showing an example of use of the tree fall prevention device according to the present invention.

  When installing on the rooftop, first, a tree fall prevention device is installed directly on the upper surface of the floor 14 on the rooftop. The floorboard may be divided and transported and assembled on the rooftop.

  The root pot portion 13 of the tree 8 is placed at the center position of the floorboard 1 of the installed tree fall prevention device.

  The support member 5 is tightly wound around the trunk 9 of the tree 8. For the support member 5, a resin belt was used. Four metal hooks 10 are attached to the support member 5.

  On the other hand, a clamp 7 is provided at the distal end 3 in the radial direction of the shape steel material 2 (2a + 2b). The lower end of the support column 6 is attached to the clamp 7 and the upper end of the support column 6 is attached to the hook 10. . The struts 6 support the tree 8 in the same radial direction as the mold steel material 2 by bringing the same four pieces as the mold steel material 2 into contact with the trunk portion 9 of the tree 8 via the support member 5.

  In addition, a coil spring 11 is interposed at the upper end portion of the column 6 and is attached to the hook 10 of the support member 5 via the coil spring 11. The coil springs 11 are interposed at the upper end portions of all the struts 6, and the struts 6 and the hooks 10 are damaged by dispersing the external force concentrated on the connection portions between the struts 6 and the hooks 10 by the elastic force of the coil springs 11. Can be prevented.

  Moreover, the support | pillar 6 is attached to the clamp 7 of the front-end | tip part 3 of the shape steel material 2 so that the angle which makes | forms with the ground may be 45 degree | times. The mold steel material 2 is expanded and contracted in accordance with the support column 6 to adjust the distal end portion 3, and is fixed with a fixing screw 12.

  The height at which the support 6 abuts on the trunk 9 of the tree 8 depends on the height and thickness of the tree 8, but is preferably about 1/4 to 1/2 of the total height from the ground. When the tree 8 receives a strong wind, the branches and leaves receive the strongest wind, so if the abutting position is too low, it will be too close to the root pot 13 and it will be difficult to support the fall of the tree, It becomes impossible to support. Also, if the contact position is too high, the trunk will bend in a strong wind, and sufficient support will not be possible. Moreover, the support | pillar 6 is conspicuous and its appearance is not good.

  The root pot portion 13 of the tree 8 fills the soil 15 so that the root pot is buried. Thereby, it stabilizes with the weight of the soil 15 embanked on the flooring board 1. Further, the root pot portion 13 may be attached to the frame (such as the steel plate 2a) of the floor plate 1 in advance by a fixing belt, and the root pot portion 13 may be tightly held.

  In this way, the tree 8 on which the fall prevention device is installed can strongly support the force of the wind received by the branches and leaves on the upper part of the tree 8 even in strong winds such as a typhoon. It is possible to prevent the fall of the tree by a supporting force smaller than that of the fixing means.

  Further, in this embodiment, the support 6 is supported by contacting the trunk 9 of the tree 8, but conversely, a wire is installed instead of the support 6, and it is stretched from four directions on the mold steel side. good. The tension force for tensioning can be adjusted by providing a turnbuckle, for example.

  The tree fall prevention device of the present invention is supposed to be installed on the roof, but can be applied to tree planting when a sufficient soil layer cannot be secured. For example, it can be applied to tree planting that can withstand strong winds without damaging the road surface, such as when installing roadside trees on pavement or concrete road surfaces.

The top view of one Example of the fall prevention apparatus of the tree by this invention is shown. The schematic sectional drawing which shows the usage example of the fall prevention apparatus of the tree by this invention is shown.

Explanation of symbols

1, 1a, 1b, 1c, 1d Base plate 2 Type steel material 5 Support member 6 Post 7 Clamp 8 Trunk 9 Tree 10 Hook 11 Coil spring 13 Root pot 14 Rooftop floor 15 Filling

Claims (3)

A base plate for placing a root pot portion of a tree and fixing it by embankment, a mold steel material radially fixed on the base plate from the center toward the outer periphery, and one end attached to the outer periphery side of the mold steel material, the tree A top-down tree characterized by comprising a plurality of supports for supporting the other end abutting against and supporting a support member provided on the outer periphery of the trunk of the tree, and an elastic member such as a coil spring connected to the support Prevention device. The apparatus for preventing a fall of a tree for rooftop according to claim 1, wherein the steel mold is extendable and contractible. Instead of a plurality of supports for supporting the other end abutting against the support member provided on the outer periphery of the tree, the support member and the steel plate material are connected to a plurality of elastic members such as coil springs. The tree fall prevention device according to claim 1 or 2, wherein the tree is fixed by being stretched with a wire.

Images