JPH0661188B2 - Tree digging method and tree digging device - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to a construction method for excavating a tree and a tree excavation device used for carrying out the construction method.

[Prior art]

Generally, when creating forests, green spaces, etc. for other purposes,
From the perspective of nature conservation and greening protection, the main trees planted here are transplanted to the adjacent mountains, gardens, and other areas. With the development of transplantation technology, such tree transplantation work is shifting from being dependent on human power to being mechanized. When mechanizing tree transplanting work, it is obvious that it is important not to cause fatal damage to trees, and in addition to this, easy handling of trees and labor saving have been sufficiently achieved. Being present, it is desirable that a series of operations can be reasonably performed without waste. Incidentally, a mechanical device of this type is disclosed in Japanese Patent Laid-Open No. 53-2.
There is a "tree excavator" (Prior Art 1) disclosed in JP 2038, and a "Tree transplanting device" (Prior Art 2) disclosed in JP-A-1-309627. The excavator of the prior art 1 is equipped with an endless rotary cutting blade on one side of a wheeled operating body so as to be vertically movable and tiltable. When using the excavator of Prior Art 1, first, move the operating body to the vicinity of the trunk of the target tree, insert the rotary blade vertically from the surface of the ground to the ground near the trunk, and place the operating body around the trunk. By making a round, to form a straight hole around the root of the target tree, then insert the rotary blade from the ground surface into the ground in an inclined manner, by making the operating body go around the trunk part once, A sloping hole is formed around the root of the target tree, and then the root of the target tree is taken out from the ground by an appropriate means. The root of the target tree thus excavated has an inverted conical cutting ground that follows the inclined hole. The implanting device of the prior art 2 is equipped with a pair of fork-shaped pawls that can be operated horizontally and vertically on both sides of the U-shaped frame, and further, can be lowered from a horizontal (retracted) state to a vertical (retracted) state. Cutters that can be installed are installed on both sides and front side of the U-shaped frame. According to the transplantation device of the prior art 2, in the state in which it is connected to the bulldozer, first, a pair of vertically held fork-shaped nails are advanced into the ground while the nails are attached to both sides of the root of the target tree. Hold it so that it holds the root, then tilt both nails inward,
These operations, such as vertical movement, forward / backward movement, and rotational movement, are appropriately repeated to form an arc-shaped groove around the root of the target tree, and then a cutter is inserted into the arc-shaped groove to form the root. Then, the nails are cut, and then both nails are horizontally rotated inwardly to scoop up the roots of the target tree, and the roots are supported by these nails. The target tree thus dug up is transported as it is to the embedding hole by using a bulldozer connected to the transplanting device and dropped into the embedding hole.

[Problems to be Solved by the Invention]

The above-mentioned prior art 1 has the following problems. One of them is that the ground is cut into an inverted conical shape via a rotary blade, so that the ground cut depth becomes unnecessarily large and the soil attached to the root of the target tree also unnecessarily increases. . The other is a method in which a hand-operated operating body equipped with a rotary blade is made to go around the trunk portion once, which makes it difficult to apply it to a sloping ground. Furthermore, the other is that there is no means for removing the root of the target tree from the ground or transporting it to the destination after cutting the ground. Of course, such take-out and transportation can be performed by existing mechanical devices, but if various types of mechanical devices are prepared at the work site and used properly, interruption of work may occur inevitably, or Since the mechanical device for other work is idled during the work, the rationality of the work and the high operating rate of each mechanical device cannot be expected. The above-mentioned prior art 2 has the following problems. One is that the pair of fork-shaped claws do not have their own positive ground excavation force. For example, when excavating both sides of the root of the target tree, other force excavation that depends on the pulling force of the bulldozer is the main, and when excavating below the root of the target tree, the holding force of both fork-shaped claws (from the inclined state Ground breaking due to the flipping force when displacing horizontally) is the main cause. In this type of external force excavation, when a cut is made in the ground through a pair of fork-shaped claws and an arc-shaped groove is formed around the root of the target tree, both fork-shaped claws receive large ground resistance. , Excavation work cannot be performed smoothly. The other one is that when a pair of fork-shaped claws are inserted into the ground to form the arc-shaped groove, the root of the tree is forcibly torn and broken by both fork-shaped claws that have no cutting function and damaged. That is. That is, the root of a tree is damaged by both fork-like nails before cutting the roots through the cutter. Furthermore, the other is that even if the root of a tree is cut through a cutter, most of the root is cut off during the excavation work preceding this, so the work of cutting the root is no longer meaningful. Is. Moreover, even if there are uncut roots, a cutter with poor operability cannot cut even roots below the root of the target tree. The other one is that even if the cutting work of the root by the cutter is effective, the preceding excavation work and the following cutting work do not proceed at the same time, so that workability is deteriorated.

[Object of the Invention]

In view of such a technical problem, the present invention is a tree digging method and a tree digging device that do not cause fatal damage to trees, and can achieve ease of handling trees, labor saving, work stability, and rationality. And is intended to be provided.

[Means for Solving the Problems]

The tree digging and raising method according to the present invention is characterized by the following means in order to achieve the intended purpose. That is, in a construction method for excavating a tree using a device in which a self-propelled initiative machine and an excavation and transfer machine operated from the self-propelled initiative machine side are integrally combined, first, in order to prepare for tree excavation In addition, hold a pair of excavation and carrier mounted on the lower part of both sides of the excavation and transport machine in an inclined state in which the outer part of these is the upper part and the inner part is the lower part, and the self-propelled lead machine is the target tree. The trunk part of the target tree between the two excavation and carrier units on the side of the excavation and carrier unit, and a pair of rotary cutters provided on the inner sides of the two excavation and carrier units facing each other. Then, the ground where the root of the target tree is rooted is cut to a width and depth corresponding to the root, and at the same time the roots of the tree protruding above the score line are cut. In order,
Outside the trunk part of the target tree, the rotary cutters of both excavating and supporting bodies are cut and entered from the ground surface to the ground in an inclined manner, and the direction of each rotary cutter is changed from the inclined state to the bottom of the target tree root. At the same time, the two excavating and supporting bodies are moved in a direction in which the rotary cutters are closed to each other, and the both excavating and supporting bodies including these rotary cutters are cut into the bottom of the root of the target tree. To remove the root of the tree from the ground,
The excavation and transfer machine is lifted to carry out the roots on both the excavation and carrier and the cut ground adhering to the roots to the ground. Based on these means, the intended purpose is achieved. Is achieved. The tree digging and raising apparatus according to the present invention comprises, in order to achieve the intended purpose, a self-propelled leading machine and an excavating and transporting machine, and the excavating and transporting machine takes in and out the trunk of a tree. A frame having an opening for receiving and an internal space for receiving the trunk of the tree, both side frame plates assembled to both side parts of the frame, and rotary cutters along both side parts of the frame respectively held on the inner side. A pair of excavating and supporting bodies assembled below the two side frame plates and a plurality of drive mechanisms for driving the two side frame plates, the excavating and supporting body, and the rotary cutter; and , Each side part of the frame and each side part of the frame are connected to each side part of the frame through the fulcrum part of each side frame plate, and the lower end parts of these side frame plates can be swung inward and outward in both sides of the frame. To While being held, each drive mechanism for pushing out and pulling back the lower end of each side frame plate in the outer and inner directions of both side portions of the frame is connected over the frame and each side frame plate, respectively, and Each rotary cutter held by the pair of excavating and supporting bodies is equipped with each drive mechanism for rotating them, and each excavating and supporting body makes each rotary cutter face each other. Each driving mechanism, which is arranged at the lower part of each side frame plate, moves each of the excavation and carrier members inward and outward of the lower parts of both frame plates. The pair of excavating and supporting members are connected to the frame plate respectively, and are supported movably under the frame plates on both sides, and the excavating and carrier machine is a self-propelled main unit via an elevating drive mechanism. It is characterized in that it is vertically movably connected to the end of the guide machine and the operation system of each drive mechanism on the excavation and carrier side is arranged in the control section of the self-propelled lead machine.

When the tree digging and raising method and the tree digging and raising apparatus according to the present invention are used, as is apparent from the above, the self-propelled main machine and the excavating and transporting machine are mainly used, and By controlling the operation of a pair of excavating and supporting bodies (with a rotary cutter) equipped, the root of the target tree can be
It can be dug up rationally from the ground without damage with the ground cut.

【Example】

A tree digging and raising method and a tree digging and raising apparatus according to the present invention will be described based on the illustrated embodiment. As is clear with reference to FIGS. 1 to 7, the self-propelled machine 1 is, for example, a self-propelled vehicle such as a bulldozer, and the self-propelled machine 1 has an excavation and carrier machine. 2 are detachably connected. In the excavating and conveying machine 2, a frame 5 having a substantially U-shaped plane has an skeleton having an opening 4 for inserting and removing the trunk portion of the tree 3 and an internal space for receiving the trunk portion of the tree 3. Both side frame plates 7 formed in the front-rear direction longer than the both side frame portions 6 of the frame 5 are provided with respective operating plates 7a protruding inward from the rear end side thereof and facing each other. As illustrated in FIGS. 3 to 5, the side frame portions 6 of the frame 5 are fulcrum portions (provided to connect the outer side portions and the upper end portions of the side frame plates 7). Shaft pin and shaft hole)
Each side frame plate 7 is swingably supported via 8. By the way, each side frame plate 7 can rotate in a range of about 40 to 60 degrees from the raised position of FIG. 5 rotated in the shape of a front C to the vertical position of FIGS. 3 and 4. Each drive mechanism 11 for rotating the both side frame plates 7 is, for example, a well-known hydraulic jack having an output shaft 11a that can move back and forth. These drive mechanisms 11 are arranged at the left side portion and the right side portion of the rear frame portion 9 of the frame 5, respectively.
Each fulcrum part (shaft pin and shaft hole) 10 for connecting the rear frame part 9 and the base end part of each drive mechanism 11, and the inner end of each operating plate 7a and the tip end of each output shaft 11a. It is attached to a predetermined section through each fulcrum portion (shaft pin and shaft hole) 12 for coupling the. The pair of plate-shaped excavating and supporting bodies 14 are provided with rotary cutters 13 on the inner sides thereof. As is clear with reference to FIGS. 1 and 6, each rotary cutter 13 includes an elongated support plate 20, and rotary shafts 25, 26 protruding from the lower surface at both ends in the length direction of the support plate 20.
A front sprocket gear 21 and a rear sprocket gear 22 respectively attached to the rotary shafts 25, 26, a chain-type endless belt 23 hung over the sprocket gears 21, 22, and surfaces of the endless belt 23. And a large number of cutting blades 23a attached at equal intervals. In each rotary cutter 13 having such a structure, these support plates 20 are attached to the inner side of the excavation and carrier 14, and are integrated with the excavator and carrier 14. Each drive mechanism 2 for rotating each rotary cutter 13
Reference numeral 7 denotes, for example, a hydraulic motor, which is mounted on the upper surface of each support plate 20 and is connected to the rotary shaft 25 by a transmission system (not shown). The two excavating and supporting bodies 14 holding the rotary cutters 13 inside are arranged below both side frame portions 6 of the frame 5 in such a manner that the rotary cutters 13 face each other, and as an example, four hydraulic jacks are provided. It is attached to the lower part of the both side frame plates 7 via the drive mechanism 16 of FIG. At this time, as clearly shown in FIG. 6 and FIG. 7, each fulcrum portion for connecting the longitudinal middle portion of each drive mechanism 16 to the front side portion and the rear side portion of the both-side frame plate 7. Each drive mechanism 16 is attached to both side frame plates 7 via (shaft pin and shaft hole) 15, and the output shaft 16a end of each drive mechanism 16 and both end portions in the length direction of each support plate 20 are connected. Each excavation and carrier 14 is movably suspended and supported via each fulcrum (shaft pin and shaft hole) 17 for connection. Incidentally, both excavation and carrier 14 can be moved from a position open outward as shown in FIG. 4 to a position closed inward as shown in FIGS. 1 and 3. In addition, in order to smoothly move both the excavating and supporting bodies 14 via the drive mechanism 16, the guide rollers 1 are attached to the ends of a plurality of brackets 18 protruding from the lower ends of the both side plate frames 7, respectively.
9 are attached, and these guide rollers 19 are applied to the upper surfaces of both the excavating and supporting bodies 14, respectively. The excavating and transporting machine 2 including the frame 5, both excavating and supporting bodies 14 with the rotary cutter 13, and others, is provided with, for example, drive mechanisms 28 and 31, which are hydraulic cylinders, and a plurality of arms 30 and 32. And is connected to the self-propelled initiative machine 1 as follows. That is, on the self-propelled machine 1, the tip portion (right end in FIGS. 1 and 2) of the vertical bending / extending arm 30 having the fulcrum portion 29 at the middle portion in the longitudinal direction and the rear frame portion 9 of the frame 5. Are connected to each other by a well-known connecting means via a support shaft and a shaft hole, and are mounted on the rear end portion (left end in FIGS. 1 and 2) of the vertical bending / extending arm 30 and on the self-propelled main machine 1. Drive mechanism 2 for vertical operation
8 is connected by well-known means, and further, the tilting operation arm 32 extending from the rear frame portion 9 of the frame 5 to the self-propelled main machine 1 side and the tilting operation arm mounted on the vertical bending / extending arm 30 are used. The drive mechanism 31 is connected by a known means. Each drive mechanism 11, 16, 27 on the side of the excavator and carrier 2
The operation systems 28 and 31 are arranged in the control unit 33 of the self-propelled machine 1. That is, with regard to raising and lowering and horizontal-tilting of the excavation and carrier 2, swinging of both side frame plates 7, movement of both excavators and carriers 14, rotation of the rotary cutter 13, and other operations on the side of the excavator and carrier 2, The drive mechanisms 11, 1 are arranged so that all of them can be performed in the control section (control room) 33 of the self-propelled machine 1.
6, 27, 28 and 31 are connected to a hydraulic unit (not shown) on the side of the self-propelled machine 1. In addition, when the frame 5 is provided with a tree support rod (not shown) projecting forward in parallel from the rear frame portion 9, when the tree is dug up and carried, the tree is in an upright state. It is convenient because it can be supported by. In the present invention, when digging up a tree using the above-mentioned tree digging device, the self-propelled main machine 1 and the excavating and conveying machine 2 are operated and controlled as illustrated below. First, a preparatory operation for tree digging is performed. As one of the preparatory operations, the excavation and transfer machine 2 connected to the self-propelled machine 1 is raised to a predetermined level via the drive mechanism 28 and the arm 30, and both side frame plates of the excavation and transfer machine 2 are moved. The drive mechanism 11 swings and rotates the outside 7 to hold the pair of excavating and supporting bodies 14 in a substantially inverted C-shape on the front surface. As another one of the preparatory operations, when the self-propelled machine 1 approaches the target tree 3, the target tree 3 is received in the frame 5 through the opening 4 of the frame 5. The trunk portion of the target tree 3 in this state is shown in FIG.
As described above, it is interposed between the pair of excavating and supporting bodies 14 provided with the rotary cutter 13. As another one of the preparatory operations, each rotary cutter 13 is continuously rotated via the drive mechanism 27. These preparatory operations may be carried out in any order as long as they do not interfere, but they are usually carried out in the order described above. Next, in order to incline the rotary cutters 13 of both excavating and supporting bodies 14 from the ground surface into the ground outside the trunk portion of the target tree 3, the both side frame plates 7 are moved inside through the drive mechanism 11. Operation of swinging and rotating to the drive mechanism 2
8. The operation of lowering the excavation and transfer machine 2 via the arm 30 is performed. By doing so, each rotary cutter 13 at the position shown in FIG. 8 (a) enters as shown in FIG. 8 (b) (c), and the ground where the root portion 3a of the target tree 3 is rooted. At the same time that G is cut into the width and depth corresponding to the root portion 3a, the root 3b of the tree 3 protruding on the cut line is formed.
Disconnect. In the above, when the both side frame plates 7 swing and rotate to the vertical position (lower limit) and stop, in other words, both excavation and carrier 1
When 4 has finished the inclined cut and changed its direction substantially horizontally, each rotary cutter 13 reaches the position shown in FIG. 9 (d). That is, each rotary cutter 13 is in a horizontal state or a state closer to horizontal than the inclined state. From this time point, both excavation and carrier bodies 14 including these rotary cutters 13 are opposed to and approach each other via drive mechanism 16 in order to cut and enter underneath root 3a of target tree 3. Move in the direction you want. By doing so, as shown in FIG. 9 (e), each rotary cutter 13 closes the ground G'under the root portion 3a of the target tree 3 and the root 3c on the cutting line while closing each other. . When the state of FIG. 9 (e) is reached, each rotary cutter 13 is stopped. Thus, when cutting of the ground and tree roots is completed at the same time,
The root portion 3a of the target tree 3 and the cut ground adhering to it have a pot-like cross-sectional shape, and these ride on the excavating and supporting body 14 including the rotary cutter 13. After that, the excavation and transfer machine 2 is raised to a predetermined level via the drive mechanism 28 and the arm 30, and both the excavation and carrier 14 are moved.
The root part 3a of the target tree 3 located above is carried out to the ground as shown in FIG. The tree 3 thus excavated is treated as follows when transplanting it. As an example, the tree 3 carried by the excavating and carrying machine 2 is carried to the planting hole (not shown) in the transplant site via the self-propelled machine 1, and the root portion 3a of the tree 3 is in the planting hole. After being dropped in, the soil and the embankment for covering the root portion 3a are applied to the inside of the planting hole and the top thereof. As another example, the dug tree 3 is turned and planted in its original location. In these operations, when the root portion 3a of the tree 3 is dropped into the planting hole, both the excavating and supporting bodies 14 are opened to the outside through the drive mechanism 16, and the tree 3 is dropped from above onto the planting hole. Operation, or operation to open both excavation and carrier 14 through both drive mechanisms 11 and 16 and incline in an inverted V shape, and slide tree 3 from above to the inside of the planting hole , Or
The operation of tilting the excavation and transfer machine 2 forward through the drive mechanism 31 and sliding down the trees 3 on both the excavation and support bodies 14 toward the inside of the planting hole is arbitrarily performed. FIG. 11 shows an example of excavating a tree 3 on a slope. The example shown in FIG. 11 is substantially the same as the previous example,
In the case of this example, each side frame plate 7 and each excavation and carrier 14
Is operated in a different manner as shown in FIG. 11 corresponding to the highland side G ″ and the lowland side G of the sloping ground G on which the target tree 3 is planted. In such a case, the lowland side G is operated. The rotary cutter 13 of a certain excavating and supporting body 14 is shown in FIG.
Cut into the ground like (C ') and (C), and
The rotary cutter 1 of the excavation and carrier 14 on the highland side G "
3 cuts into the ground as shown in Fig. 11 (b), (c), (d), and (e), so that the ground is cut along the cutting direction and at the same time, the tree overhanging the cutting line. The root 3b of 3 is also cut. Thus, when cutting of the ground and tree roots is completed at the same time,
Since the root portion 3a of the target tree 3 and the cut ground adhering to the root portion 3a are placed on both the excavating and supporting bodies 14 including the rotary cutter 13, they can be subsequently handled according to the contents described above. In the case of the tree digging and raising apparatus according to the present invention, as is obvious, both the excavation and carrier 1 mounted on the excavation and carrier 2.
4 can be operated simultaneously or independently. Therefore, by using either one or both of the two excavating and supporting bodies 14, the ground G on which the trees 3 are planted can be cut into a planar polygon around the trunk portion thereof. As a specific example, cutting the ground G in which the trees 3 are planted into a plane quadrangle around the tree trunk means that the ground G is first provided outside the trunk portion of the tree 3 so as to correspond to two opposite sides of the quadrangle. Is cut in two places, and then the ground G is cut in two places corresponding to the remaining two sides of the quadrangle (ground cut from four places in total). Among these preceding and succeeding cutting operations, the excavating and supporting body 14 with the rotary cutter 13 that has made a notch to a predetermined depth in the preceding work is once extracted from the ground, but in the subsequent work, the root portion of the tree 3 is cut. The excavating and supporting body 14 with the rotary cutter 13 that has cut into and advanced to the bottom of 3a carries out the root portion 3a of the target tree 3 and the cut ground adhering thereto through this. In this way, when the ground G on which the trees 3 are planted is cut multiple times around the tree trunk, the ground cutting work excluding the ground cutting work that is finally performed is a preliminary work that precedes the method of the present invention. The ground slicing work performed on the above corresponds to the method of the present invention. It is effective to carry out such a plurality of cutting operations when excavating a large tree.

【The invention's effect】

The tree digging method according to the present invention has the following effects. On the outside of the trunk of the target tree, the rotary cutters of both excavating and supporting bodies were made to incline into the ground from the ground surface, and each rotary cutter changed its direction from the inclined state to the bottom of the target tree. At this time, both excavating and supporting bodies are moved in a direction in which the rotary cutters close each other, and these rotary cutters are cut into the bottom of the root of the target tree, so that the root overhanging in the ground is adjusted to the shape of the root. It can be cut without leaving extra soil under the root. Therefore, the handling of the tree after the fact becomes easy. Since the rotary cutter is cut into the ground as described above, the roots from both sides of the root of the tree to the bottom of the root are
It is cut without tearing. Therefore, it does not cause fatal damage to trees. The rotary cutter is used to cut into the ground so that it does not receive a large amount of ground resistance.Moreover, the work speed is doubled because a pair of rotary cutters cut the ground and cut tree roots at the same time instead of using a single rotary cutter. To do. In particular, in the above, since the cutting of the ground and the cutting of the tree roots proceed at the same time, the workability does not deteriorate as compared with the case where these are performed separately. Besides, the work of taking out the root of the target tree from the ground,
Since the cutting work can be continued by utilizing both the excavating and supporting bodies, workability can be reasonably performed in this respect as well. After setting the excavator and carrier at a predetermined position,
Cut the ground with the rotary cutter of both excavation and carrier,
It is not necessary to run the self-propelled initiative machine while cutting the tree roots, and therefore, it is possible to perform cutting and cutting stably with the self-propelled initiative machine in a fixed position as a base point. Furthermore, in the above, when both rotary cutters are cut and entered under the root of the target tree, the cutting ground attached to the root of the target tree is released from the ground, and the roots of the target tree are simply raised by raising both excavating and supporting bodies. Since the part can be taken out from the ground without difficulty, this work can be performed stably. The tree digging and raising apparatus according to the present invention has the following effects. The excavation and transfer machine connected to the self-propelled machine has a pair of excavation and carrier bodies holding the rotary cutters and related structures, and the self-propelled machine has both excavation and carrier machines with rotary cutters. Since a means for driving and controlling the body is provided, it is possible to perform a series of operations such as cutting the ground, cutting tree roots, and removing the root of the tree from the ground in the above-mentioned construction method. Since each work can be covered by one device and one worker can perform these works, labor saving can be achieved. Since the pair of excavating and supporting bodies is configured to move skillfully, it is possible to cut the ground and cut the tree roots according to the shape of the root part of the root protruding in the ground.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a tree digging and raising apparatus according to the present invention, FIG. 2 is a side view of the apparatus, FIG. 3 is a front view of the apparatus, and FIG. FIG. 5 is a front view of the state in which the dual carrier is opened, FIG. 5 is a front view of both the excavating and supporting bodies which are tilted and raised in the same device, and FIG. 6 is a frame side frame plate and excavating and supporting body in the same device. Fig. 7 is a partial perspective view showing the relationship of the rotary cutter, Fig. 7 is a perspective view showing the relationship between the frame of the device and the excavating and supporting body, and Figs. 8 to 10 are diagrams of the tree excavation method according to the present invention. FIG. 11 is an explanatory view schematically showing one embodiment in the order of steps, and FIG. 11 is an explanatory view schematically showing another embodiment of the tree digging and raising method according to the present invention. 1 …… Self-propelled lead machine 2 …… Excavation and transfer machine 3 …… Tree 3a …… Root part 5 …… Frame 7 …… Side frame plate 11 …… Drive mechanism 13 …… Rotary cutter 14 …… Drilling and carrying Body 16 ... Drive mechanism 27 ... Drive mechanism 28 ... Drive mechanism 30 ... Arm 31 ... Drive mechanism 32 ... Arm G ... Ground

Claims (2)

[Claims] 1. A construction method for excavating a tree using a device in which a self-propelled machine and an excavator and carrier machine operated from the self-propelled machine side are integrally combined. For preparation, a pair of excavating and supporting bodies mounted on the lower parts of both sides of the excavating and conveying machine are held in an inclined state in which the outer side of these is the upper side and the inner side is the lower side, and a self-propelled machine. To the target tree, insert the trunk of the target tree between both the excavation and carrier on the excavation and carrier side, and a pair equipped on the inner side of the both excavation and carrier opposite to each other. The rotary cutter is rotated, and then the ground where the root of the target tree is rooted is cut to a width and depth corresponding to the root, and at the same time, the root of the tree that overhangs the cut line is cut. Cutting In order,
Outside the trunk part of the target tree, the rotary cutters of both excavating and supporting bodies are cut and entered from the ground surface to the ground in an inclined manner, and the direction of each rotary cutter is changed from the inclined state to the bottom of the target tree root. When the rotary cutters are closed, the two excavating and supporting bodies are moved in a direction in which the rotary cutters are closed with each other, so that the rotary cutters are cut into the roots of the target tree including the rotary cutters. To take it out from the inside,
A tree excavation method in which the excavation and transfer machine is raised and the roots on both excavation and support bodies and the cut ground adhering to them are carried to the ground. 2. A self-propelled main machine and an excavating and transporting machine, wherein the excavating and transporting machine receives an opening for inserting and removing the trunk of the tree and a trunk of the tree. A pair of excavating and carrying units that have a frame with an internal space, both side frame plates that are assembled to both side parts of the frame, and rotary cutters that extend along both side parts of the frame are held inside the respective inner side parts and are assembled under the two side frame plates. The body and the two side frame plates, the excavating and supporting body, and a plurality of drive mechanisms for driving the rotary cutter, and the both side frame plates are fulcrums on each side of the frame and each side frame plate. Are connected to the respective side portions of the frame via the parts, the lower end portions of these side frame plates are swingably supported inward and outward of both side portions of the frame, and the lower end portions of the side frame plates are Both frames Each drive mechanism for pushing and pulling back and forth inward and outward of the part is connected over these frames and side frame plates respectively, and in each rotary cutter held by the pair of excavation and carrier , Each of which is provided with each drive mechanism for rotating them, and each of the excavation and carrier is arranged at a lower portion of each side frame plate with each rotary cutter facing each other, and Each drive mechanism for moving each excavation and support body inward and outward of the lower part of both side frame plates is connected to each of the excavation and support body and each side frame plate, and the pair of excavation and support bodies is carried out. The body is movably supported under the frame plates on both sides, and the excavator and carrier is vertically movably connected to the end of the self-propelled lead machine via a lifting drive mechanism. Operation system of the driving mechanism in a cum conveyor side, trees digging apparatus characterized by being arranged in a handling portion of the self-propelled driven machine.