JP2004027699A - Hole opening machine and tree rejuvenative construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hole opening machine capable of easily forming holes of prescribed depth in a limited tree planting area. <P>SOLUTION: An open hole 22 of prescribed depth is formed while discharging sediment excavated by an auger screw 16 by pressing a bit 15 to the ground while rotating a rotating shaft 14, to the outside of a guide cylinder 19 from a discharge port 20 of the guide cylinder 19. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
FIELD OF THE INVENTION
The present invention relates to an opening machine for opening an opening for burying a columnar body in a planting area where a street tree is planted, and to a method of restoring tree vigor using the opening machine.
[0002]
[Prior art]
Street trees are planted at predetermined intervals along a city road or along a main road to enhance the scenery. In general, these roadside trees are often planted on the ground slightly exposed from the road surface on which concrete is laid, so they cannot be fully rooted and have insufficient water retention capacity and sufficient care. The withering state is apt to progress due to inadequacy and the like. Trees are easily damaged by changes in weather conditions, such as intense heat and the passage of typhoons, and when replanting dead trees, there is no room for heavy equipment such as backhoes to enter, and work is delayed by manual work. There is no present.
[0003]
[Problems to be solved by the invention]
However, although a method of greening and a greening method have been proposed in an environment where native organisms are unlikely to inhabit, such as tropical areas, arid areas, and dunes (for example, Japanese Patent Application Laid-Open No. 2000-32840, Japanese Patent Application Laid-Open No. At present, there is no proposal on a method or a construction method for regenerating a dying (degraded tree) street tree.
Street trees are planted in a limited tree planting area slightly exposed from the concrete-covered road surface, making it difficult to work with excavators such as backhoes. It is desirable to be able to recover the tree vigor, because there is no waste of resources and labor and the landscape is improved.
[0004]
An object of the present invention is to solve the above-described problems of the prior art, and reduce the tree vigor by a drilling machine capable of easily forming a hole of a predetermined depth in a limited tree planting area and a simple construction method using the drilling machine. It is an object of the present invention to provide a tree vigor restoration method for restoring street trees.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present invention has the following configuration.
That is, in a drilling machine, in a drilling machine that forms an opening around a tree in a tree planting area where a street tree is planted, the drilling machine is rotatably mounted by a driving source provided in the drilling machine main body, A rotating shaft provided with a bit in the portion, an auger screw formed helically around the rotating shaft, and integrally attached to the drilling machine main body, and projecting the bit from a lower end portion to rotate the rotating shaft. A guide cylinder having a discharge port for discharging the earth and sand conveyed by the auger screw is provided at the upper end thereof, and the rotary shaft is rotated while the bit is pressed against the ground to excavate, and the excavation is performed. An opening hole having a predetermined depth is formed while the soil and sand conveyed through the guide cylinder by the August screw and discharged from the discharge port to the outside of the cylinder.
An excavation ring connected to the auger screw is continuously provided at a tip end side of the rotary shaft, and a tip is formed on an excavation surface of the excavation ring.
Further, a plurality of ridges projecting from a plurality of locations in the circumferential direction are formed in the inner wall of the guide cylinder in the axial direction.
Further, the drilling machine main body is detachably suspended and supported at the tip of a boom of a traveling device, and excavates by rotating a rotary shaft while pushing a bit to the ground by the boom.
Also, in the vigor restoration method of burying a vigor restorative material having water retention and ventilation in the tree planting area where the street trees were planted, the drill bit was pressed against the ground using the above-mentioned drilling machine, and the rotation was performed. Drilling a hole with a bit and an auger screw while rotating the shaft to form an opening having a predetermined depth, filling the opening with a tree-restoring material, and discharging earth and sand discharged around the opening. Exposing the upper surface of the tree-restoring material and backfilling it.
Further, the vigor-restoring material is such that a mesh bag is filled with a pearlite material, and an exposed portion of the vigor-restoring material that is exposed on the ground surface is covered with a cap material having a through-hole. .
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 (a) and 1 (b) are cross-sectional explanatory views of a drilling machine and cross-sectional views taken along arrows AA, FIG. 2 is an external view showing a state in which the drilling machine is mounted on a boom of a traveling device, and FIGS. It is a perspective explanatory view, a plane explanatory view, and a sectional explanatory view showing a tree vigor recovery step.
[0008]
First, a schematic configuration of a drilling machine will be described with reference to FIGS. 1 (a) and 1 (b) and FIG. In FIG. 2, reference numeral 1 denotes an opening machine, which forms an opening around a tree in a planting area where a street tree is planted. The drill 1 is suspended and supported at the tip of a working boom 3 of an endless track type traveling device 2 that can travel on the ground, for example. Specifically, a connecting jig 4 is provided at the tip of the working boom 3 so as to be rotatable in the direction of arrow P about the fulcrum 5. Further, a drilling machine main body 6 is attached to the connecting jig 4 so as to be rotatable in the direction of arrow Q about the fulcrum 7.
[0009]
The traveling device 2 includes a hydraulic drive mechanism such as an engine, a hydraulic pump, and a hydraulic cylinder, a drive unit having a built-in compressed air, a driver's cab for accommodating and operating a worker, and a main body-side boom 8 for performing work. A first cylinder 9 to be rotated is provided. Specifically, the main body-side boom 8 is provided rotatably about a fulcrum shaft 10 provided on the traveling device 2, and a cylinder rod 9 a of the first cylinder 9 is connected to the main body-side boom 8. A second cylinder 11 is provided on the body-side boom 8, and a cylinder rod 11 a is connected to the working-side boom 3. The first cylinder 9 is operated by the hydraulic pressure supplied from the hydraulic drive mechanism of the traveling device 2 to raise the body-side boom 8, and the second cylinder 11 is operated to lower the posture of the working-side boom 3 vertically downward. By doing so, the drilling machine 1 can be supported upright in the vertical direction with respect to the ground. When pushing the drilling machine 1 against the ground, the drilling machine 1 is extended against the ground by extending the cylinder rod 11a of the second cylinder 11 while pulling the cylinder rod 9a of the first cylinder 9. It can be pushed almost vertically. The work side boom 3 is provided with a third cylinder 12, but is not used in this embodiment.
[0010]
Next, the structure of the punch 1 will be described with reference to FIGS. The drilling machine main body 6 is provided with a hydraulic motor 13 as a driving source. The hydraulic motor 13 is supplied with hydraulic pressure from a hydraulic drive mechanism of the traveling device 2 via a hydraulic hose. The rotating shaft 14 is rotatably mounted by the hydraulic motor 13. A bit 15 having a sharp tip is provided at the tip of the rotary shaft 14. Around the rotary shaft 14, an helical screw 16 formed in a spiral shape is provided integrally. The auger screw 16 transports the excavated earth and sand upward to discharge it. An excavation ring 17 connected to the auger screw 16 is connected to the tip side of the rotary shaft 14. A tip 18 is formed on the excavation surface of the excavation ring 17 along the rotation direction. The excavation ring 17 is provided to facilitate the entry of the auger screw 16 by cutting the roots of the plant, because the root of the plant may not be able to excavate when digging an opening hole around the tree. ing.
[0011]
Further, a guide cylinder 19 is attached to the drilling machine main body 6 so as to hang down. The rotating shaft 14 is housed in the guide cylinder 19 with the bit 15 protruding from the lower end. A discharge port 20 for discharging the earth and sand conveyed by the August screw 16 is formed at the upper end side of the guide cylinder 19. Further, on the inner wall of the guide cylinder 19, there are formed in the axial direction protrusions 21 projecting at a plurality of places (three places in this embodiment) in the circumferential direction. The ridge 21 is provided so that the earth and sand are not returned by the ridge 21 when earth and sand are conveyed upward in the guide cylinder 19 by the August screw 16.
[0012]
The drilling machine body 6 pushes the bit 15 to the ground by operating the cylinder of the traveling device 2 while being supported by the tip of the working boom 3 so as to be rotatably suspended. In this state, the hydraulic motor 13 is activated to rotate the rotary shaft 14 so that the bit 15 enters the ground. The earth and sand excavated by the excavation ring 17 and the auger screw 16 are conveyed upward and discharged from the discharge port 20 of the guide cylinder 19 to the outside of the cylinder to form an opening having a predetermined depth. After excavation, the earth and sand remaining on the August screw 16 in the guide cylinder 19 can be easily discharged from the guide cylinder 19 by rotating the rotary shaft 14 in the reverse direction.
[0013]
By using the above-described drilling machine 1, it is possible to easily drill a hole having a predetermined depth in a limited tree planting area. Further, since the drilling machine 1 can be attached to and detached from the end of the boom of the traveling device 2 such as an existing backhoe which is generally used, the drilling operation can be performed with minimum necessary equipment without taking up a working place.
Further, even in a place where roots such as trees and flowers are stretched, the root can be cut and excavated by the tip 18 of the excavation ring 17, and the excavated earth and sand is provided on the inner wall of the guide cylinder 19. The protrusion 21 allows the discharge without retreating.
[0014]
Next, a vigor restoring method of embedding a vigor restorative material having water retention and air permeability in a planting area where a street tree is planted will be described with reference to FIGS.
First, a tree planting area opening hole is formed around a tree whose vegetation has declined. Specifically, using the drill 1 provided at the end of the boom in the traveling device 2 described above, the bit 15 is pressed against the ground at a position about 50 cm outward from the root of the tree, and the rotating shaft 14 is rotated. The drilling is performed by the drilling ring 17 and the auger screw 16 while the is rotated to open an opening 22 having a predetermined depth L (for example, about 60 cm) (see FIG. 5). About four such openings 22 are formed around the tree 23 (see FIG. 3). The earth and sand excavated by the formation of the opening hole 22 is discharged and deposited near the opening hole 22.
[0015]
Next, the opening hole 22 is filled with a tree-restoring material. Specifically, the tree vigor restoration material 24 in which a mesh bag is filled with a pearlite material having water retention and air permeability is filled. The exposed portion of the tree-restoring material 23 exposed on the ground surface is covered with a cap material 26 having a through hole 25 formed therein (see FIG. 4).
[0016]
Next, the earth and sand discharged around the opening hole 22 is buried in the periphery by exposing the upper surface of the cap material 25. As a result, the appearance of the tree planting area is not impaired, and the air permeability and water retention of the root of the tree 23 are not impaired. In addition, when water is supplied or nutrients are supplied, it can be performed through the through-hole 24 of the cap material 25 or by removing the cap material 25, so that a tree vigor recovery effect can be expected by regular and simple maintenance work.
[0017]
According to the above-mentioned tree vigor restoration method, a roadside tree whose tree vigor has declined can be recovered by a simple method using the drilling machine 1. In addition, it is possible to expect a vigor recovery effect by performing regular and simple maintenance work on the vigor recovery material 23.
[0018]
As described above, the preferred embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments, and the drilling machine 1 shares the excavator body of the shovel type excavator. It goes without saying that many modifications can be made without departing from the spirit of the invention, such as a good machine.
[0019]
【The invention's effect】
By using the drilling machine according to the present invention, it is possible to easily drill a hole having a predetermined depth in a limited tree planting area. In addition, since the drilling machine can be attached to and detached from the end of a boom such as a commonly used backhoe, the drilling operation can be performed with minimum necessary equipment without taking a working place. In addition, even in a place where roots such as trees and flowers are stretched, it is possible to cut the root with the tip of the drilling ring and excavate, and to project the excavated earth and sand on the inner wall of the guide cylinder By this, it can be discharged outside the cylinder without retreating. In addition, according to the tree-restoration method using a hole drill, it is possible to recover a street tree whose tree-strength has declined by a simple method. In addition, a regular and simple maintenance work on the tree-restoring material can expect a tree-restoring effect. Therefore, landscapes such as street trees can be improved at low cost without wasting resources and labor.
[Brief description of the drawings]
FIG. 1 is an explanatory cross-sectional view of a drilling machine and a cross-sectional view along arrow AA.
FIG. 2 is an external view showing a state in which the drill is attached to a boom of a traveling device.
FIG. 3 is a perspective explanatory view showing a tree vigor recovery step.
FIG. 4 is an explanatory plan view showing a tree vigor recovery step.
FIG. 5 is an explanatory sectional view showing a tree vigor recovery step.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Opening machine 2 Traveling device 3 Work side boom 4 Connecting jig 5, 7 fulcrum 6 Opening machine main body 8 Main body boom 9 First cylinder 10 Support shaft 11 Second cylinder 12 Third cylinder 13 Hydraulic motor 14 Rotation Shaft 15 Bit 16 Auger screw 17 Drilling ring 18 Tip 19 Guide cylinder 20 Discharge port 21 Ridge 22 Opening hole 23 Tree 24 Vigor recovery material 25 Through hole 26 Cap material

Claims (6)

In a hole drilling machine that forms an opening around the tree in the tree planting area where the street tree was planted,
A rotating shaft that is rotatably mounted by a drive source provided on the drilling machine main body and has a bit at the tip end;
An auger screw formed spirally around the rotating shaft,
A guide cylinder, which is integrally attached to the drilling machine main body, protrudes the bit from the lower end portion, accommodates the rotating shaft, and has a discharge port formed at the upper end portion for discharging the earth and sand conveyed by the auger screw. Prepare,
While the bit is pushed against the ground, the rotary shaft is rotated to excavate, and the excavated earth and sand is conveyed in the guide cylinder by the auger screw and discharged from the discharge port to the outside of the guide cylinder while opening the hole having a predetermined depth. An opening machine characterized by forming a. The drilling machine according to claim 1, wherein a drilling ring connected to the auger screw is connected to a tip side of the rotary shaft, and a tip is formed on a drilling surface of the drilling ring. . 2. The drilling machine according to claim 1, wherein a plurality of ridges projecting from a plurality of locations in a circumferential direction are formed on an inner wall of the guide cylinder in an axial direction. 2. The drilling machine according to claim 1, wherein said drilling machine body is detachably hung and supported on a tip of a boom of a traveling device, and rotates the rotary shaft while pushing a bit to the ground by said boom to excavate. Drilling machine. In the vigor restoration method to bury vigor restorative material having water retention and ventilation in the planting area where the street trees were planted,
Using the drilling machine according to any one of claims 1 to 3, the bit is pressed into contact with the ground, and the hole is drilled by the bit and the auger screw while the rotary shaft is driven to rotate. Opening a hole;
A step of filling the opening hole with a tree-restoring material,
Exposing the top surface of the vigor-restoring material to backfill the earth and sand discharged around the opening hole. 6. The vigor-restoring material is a mesh bag filled with a pearlite material, and an exposed portion of the vigor-restoring material exposed on the ground surface is covered with a cap material having a through hole. Tree vigor restoration method described.

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