JP7107566B2 - automatic wood cutting device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tree cutting device that traverses (in the radial direction) fallen trees that have been cut down at a vegetation site or that have naturally fallen and laid down at desired designated intervals.

A wood cutting device for treating standing trees, but not fallen trees, can be found in US Pat. When this device is attached to the base of a standing tree, first, the branch cutter has a means for cutting off the branches while moving upward so as to cut off the upper branches. , and repeat the cut-and-cut operation all the way down. Such an operation of cutting down standing trees actually requires an extremely difficult device configuration, and the following inconveniences arise as a device to be brought into the site and handled.
First of all, it is natural that branches must be removed before cutting a standing tree. The device becomes larger and heavier because of the branch trimmer.
The subsequent tree cutting and chopping device must be held tightly against the standing tree to prevent it from slipping off and moving requires the weight of both the branch cutter and cutter (gravity pulls down). It is clear that a mechanism to support the device is necessary, and the whole device becomes heavy, and it is also inconvenient to bring it to the site and install it manually.
Furthermore, as is also done in this document, if the saw blade bears the weight of the upper tree during cutting, the cutting action will not be successful, so a mechanism is required to grip the upper tree. There is something. This is another factor that makes the device critical.
Furthermore, there is a high risk that the branches and the upper tree parts to be cut and dropped will hit the device below and be destroyed when they fall. A gimmick becomes essential, which is also a critical factor. Thus, there is a very impractical inconvenience in treating standing trees on site.
In view of such a reality, in the present application, we give up processing trees as they are, and target trees that have been knocked down or that have fallen and lie down.
Moreover, the target is an independent horizontal tree with only the trunk that has already had its branches removed. This seems reasonable for the following reasons.
If you target a tree with branches, it will be attached with a branch trimmer, and when some branches are cut while trimming the branches, the trunk that has lost its support will fall and change its state. . This means that there is a high possibility of breaking the device. Therefore, it seems better to cut off the branches with another chainsaw and keep the tree in a stable fixed state.
Furthermore, as is often the case with natural fallen trees, multiple trees may cross and fall. Since the intersection becomes an obstacle for a self-propelled device, it is convenient to separate it by cutting it with a chainsaw or the like in advance to make it independent. In this way, if an independent tree with only a trunk is targeted, the device only needs to have the function of cutting horizontally, and compared to the previous device, it can be made lighter and smaller, and can be brought to the site and installed easily. It is extremely convenient to

At actual sites, thinned trees and natural fallen trees are left without being used.
Since it costs a certain amount of money to transport trees to lumber mills and wood processing facilities, large-scale felling means, cranes, trucks, and other transportation means are used for large trees such as pillars that are relatively profitable. In such a state, even fine trees remain unused, and especially thinned trees and naturally fallen trees are not used at all.
However, there are also uses other than pillars, such as sliced timber and chipped timber. Since the length of the sliced material can be set to a desired value, it is possible to use a log rather than a sliced material.
In this way, when processing a free standing tree that has no branches, it is placed on the tree and moved sideways, so the weight of the device is no longer an issue, and there is no fear that the cut part will hit the device.

JP 2012-139198

As described above, the problem of the present application is to avoid inconveniences such as the risk of slipping down while clinging to a tree, the risk of the weight of the tree part being applied to the blade of the saw, and the risk of destroying the device due to falling trees. To provide an automatic wood cutting device which can be constructed in a small size, can be brought to a vegetation site, can be easily installed, and can cut wood to a desired length, thereby facilitating transportation and the like, and promoting utilization of wood.

The description will be made according to the claims below.
The invention according to claim 1 is an automatic tree cutting device,
It is attached by straddling the trunk of a lying tree, and after the attachment, the operation of moving and cutting on the tree is repeated, and includes a tree holding portion for holding the straddled tree and a saw portion for cutting the tree, a setting/control unit for setting and controlling operations of the wood holding portion and the saw portion; and a base for mounting the wood holding portion, the saw portion, and the setting/control portion,
The tree holding part is a means for holding the tree trunk at least two horizontal positions below the horizontal axis passing through the upper part of the straddling tree and the center of the tree trunk, and at least the upper means is provided with a wheel rotatable in the longitudinal direction on the trunk and means for driving the movement of said wheel, and the means arranged at a position below the horizontal axis constitutes a position setting means for holding the tree pressing wheel against said trunk. death,
The saw unit includes a saw body including a saw for cutting the trunk and a saw driving means for driving the saw, a connection base to which the saw body is connected, and a slide rail for sliding the connection base. a slider, and slider position setting means for making the slide rail movable in a direction perpendicular to the direction of the slide and for giving the movable position,
The setting/control unit includes setting input means for setting at least an interval between cuttings (or a cutting pitch) for cutting the tree, display means for displaying setting items during the setting, and Cutting completion detecting means for detecting whether the cutting is completed; Movement amount measuring means for detecting whether the distance that the car has moved in the longitudinal direction on the trunk matches the interval between the cuttings; and the setting means. , a controller for controlling the display means, the cutting completion detection means, the movement amount measurement means, the saw section, and the wood holding section.

The invention according to claim 2,
3. The means of the upper part of the tree holding part and the means arranged below the horizontal axis have means for moving vertically and horizontally and for applying pressure to the trunk. 2. The automatic wood cutting device according to 1.

The invention according to claim 3 is the automatic wood cutting device according to claim 1 or claim 2,
As a means arranged at a position below the horizontal axis, the distance between the horizontal and at least two positions of the wooden holding parts is H, and the wooden holding part on the upper part of the straddling tree and the wooden holding parts at the two positions It is characterized in that L≧H/2, where L is the distance from the horizontal line connecting the parts.

The invention according to claim 4 is an automatic tree cutting device,
The setting/controlling section of claim 1 or claim 2 has trunk diameter measuring means for measuring the trunk of the tree, or the tree holding section of claim 3 has R={L ² +( H/2) ² }/L is a trunk diameter measuring means.

The invention according to claim 5 is the automatic tree cutting device according to any one of claims 2 to 4, wherein the tree retainer section cuts the trunk when moving in the longitudinal direction on the trunk. It is characterized by having a means for reducing the pressing pressure and increasing the pressure for pressing the stem when the trunk is cut by stopping.

The invention according to claim 6 is the automatic wood cutting apparatus according to any one of claims 2 to 5, wherein the upper means of the wood retainer and the means arranged below the horizontal axis. is provided with a stopper that can be engaged and disengaged for holding the position where it moves vertically and laterally and stops and presses.

The invention according to claim 7 is the automatic tree cutting device according to claim 6,
A driving means is provided to engage and disengage the stopper, and the controller controls the engagement and disengagement of the stopper.

The invention according to claim 8 is the automatic tree cutting apparatus according to any one of claims 1 to 7, wherein the set values for the intervals between cuts by the setting input means are a plurality of different values. It is characterized by

The invention according to claim 9 is the automatic tree cutting device according to any one of claims 1 to 8, wherein the side of the tree to be cut is pushed toward the falling side so that the falling tree is cut. It is characterized by providing an interference prevention means for preventing the device from hitting the device.

According to the tenth aspect of the present invention, in the automatic tree cutting apparatus according to any one of the first to ninth aspects, the contact is prevented between the saw and the ground on the side where the saw contacts the ground. It is characterized by providing a ground interference prevention tool.

The invention according to claim 11 is the automatic tree cutting apparatus according to any one of claims 1 to 10, wherein the setting input means is provided with a camera for monitoring the distance from the ground and stones, Or, proceed to the next step by cutting to the extent that it does not hit the ground or stones, skip the monitoring place without cutting, or shift the position as much as possible. It is characterized in that it is possible to set whether to disconnect.

With the construction as described above, the automatic tree cutting device according to the present invention can avoid the inconveniences of the conventional device, and can be constructed to be light and small. By attaching it, the tree can be automatically cut at the set intervals, and the cut tree can be easily transported.

1 is a diagram showing an embodiment of an automatic tree cutting device according to the present invention; FIG. 1 is a diagram showing one embodiment of the configuration of an automatic tree cutting device according to the present invention; FIG. It is a figure which shows one embodiment of the operation|movement of the automatic tree cutting device concerning this invention. It is a figure which shows one embodiment of the operation|movement flow of the automatic tree cutting apparatus concerning this invention. It is a figure which shows other one embodiment of the automatic wood cutting apparatus concerning this invention. It is a figure which shows one embodiment of the cutting which attached the automatic tree cutting device concerning this invention to the tree. It is a figure which shows one embodiment of the saw part of the automatic tree cutting apparatus concerning this invention. It is a figure which shows one embodiment of the tree holding part of the automatic tree cutting device concerning this invention. 1 is a diagram showing a conventional wood cutting device; FIG.

FIG. 1 is a diagram showing one embodiment of an automatic tree cutting device according to the present invention. FIG. 2 is a diagram showing one embodiment of the configuration of the automatic tree cutting device according to the present invention. Both figures will be compared and explained below.
The automatic wood cutting device 1000 includes a saw section 1100 (enclosed by a dotted line), a wood holding section 1200 (having 1200A and 1200B as indicated by a dashed line), a setting/control section 1300 (enclosed by a solid line), and a base 1400. .
The automatic tree cutting device 1000 is installed so as to straddle an independent tree lying with its branches not trimmed. When activated, it cuts the tree at the desired length along the length of the set trunk and moves to make the cut.
Each of the above parts will be further explained.
The saw section 1100 includes a saw body 1110 , a saw body slider 1120 and slider position setting means 1130 . The saw body 1110 has a saw 1111 and saw driving means 1112 for driving the same. The saw drive means 1112 may be electric or engine driven. The saw body 1110 can be imagined as a commercially available chain saw, but may be a rotary saw. The saw body 1110 is connected to a saw body slider 1120, and the saw body slider 1120 performs a cutting operation by sliding (marked with * in this figure) when cutting wood.
The saw body slider 1120 includes a connection base 1121 to which the saw body 1110 is connected and a slide rail 1122 for sliding this.
Furthermore, the slide rail 1122 is movable in a direction perpendicular to the slide direction, and the means for setting the position is the slider position (in this figure, the position in the height direction of the saw as a result, + ) is a setting means 1130 .

The wood holding part 1200 is means for holding the tree when the automatic wood cutting device 1000 is placed on the tree to be cut and making the tree movable between cuttings. In order to hold down a tree, at least three holding parts are required. As shown, it has means 1200A and 1200B. A pusher wheel 1210 for holding down the surface of the wheel against the surface of the trunk of the tree, a moving drive means 1220 for rotating this to move the automatic tree cutting device 1000 on the trunk, and a pusher wheel 1210. A pusher wheel position setting means 1230 for holding against the trunk. Furthermore, if a trunk diameter measuring means 1240 for measuring the diameter of the trunk is provided, it is convenient for setting the position of the wood pusher or as a guideline for the end of cutting. As the stem diameter measuring means 1240, a camera or an optical sensor may be used.

The setting/control unit 1300 includes setting input means 1310 for setting necessary items such as the length (pitch) of the tree between cuttings, cutting movement amount, saw rotation speed, etc., and cutting completion detection means 1320 for detecting the completion of cutting. A movement amount measuring means 1330 for determining the distance by which the automatic tree cutting apparatus 1000 is moved between cuttings, a display means 1340 for performing necessary displays in settings, etc., controls related to these inputs and outputs, and a saw section 1100 and a controller 1350 for controlling the tree holding section 1200 (including the trunk diameter measuring means 1240).

The means described above are incorporated in the base 1400 . The setting/control section 1300, the slider position setting means 1130 and the vehicle position setting means 1230 are fixedly attached to the base body 1400, and the other moving parts are in contact with the slider position setting means 1130 and the vehicle position setting means 1230. move against. These details are detailed in FIGS.

FIG. 5 is a diagram showing another embodiment of the automatic tree cutting device according to the present invention.
A comparison with FIG. 1 makes it easy to see that the attachment of the saw part 1100 to the wood holding part 1200 or the base 1400 is different. Since the direction is only changed by 90° compared to FIG. 1, further explanation is omitted.

FIG. 3 is a diagram showing one embodiment of the operation of the automatic tree cutting device according to the present invention.
The horizontal axis is the distance along the length of the tree trunk and the vertical axis is the distance traveled by the saw when cutting.
Cutting/moving processing is performed under the control of the controller 1350 according to various amounts set by the setting input means 1310 . When the automatic tree cutting device 1000 is attached to the trunk of a tree and processing is started, the tip is first cut once and the tip is processed, then the first specified movement distance (set pitch) is moved and stopped, and then stopped. Cutting is performed by moving the saw while operating (rotating) it in this state. After that, the saw is returned, moved to the next designated movement distance (set pitch), stopped, and then moved and cut while being operated (rotated) in the stopped state. This action is repeated as many times as necessary. The figure shows a case where the pitches and trunk diameters are different, but they may be the same.
When the automatic wood cutting device is moving, it is convenient to reduce the pressing pressure of the wood presser against the tree so that the wheels can rotate smoothly, and to increase the pressing pressure when stopping or cutting.

Next, a disconnection flow will be described.
FIG. 4 is a diagram showing one embodiment of the operation flow of the automatic tree cutting device according to the present invention.
1) The operator attaches the automatic tree cutting device 1000 to the trunk of the tree.
2) Turn on the power switch.
3) Refer to the display screen to input settings and corrections such as the cutting mode and movement pitch. Same as before, go to next. Here, the cutting mode refers to a method of cutting while moving the inclination of the saw. Or, "If you can change the type of saw to be attached, it means how to cut corresponding to this. Once the settings are confirmed,
4) Once cutting is started, cutting and movement are automatically repeated as follows.
5) The trunk diameter is automatically measured.
6) Make a cut (saw movement) corresponding to the trunk diameter.
7) Check if disconnection is complete. If it is not completed, the disconnection is performed as it is until it is completed.
8) Determine whether all work is completed. This is done by detecting the full pitch set in the setting input means 1310 or by detecting the leading edge. For example, it is preferable to provide a stem tip detection means at the tip in the direction of travel, which is not the side where the saw is located. For example, it can be used in various ways such as cameras, light sensors, and contact sensors. With the contact sensor, since the tip part does not touch the trunk, it can be distinguished.
9) If all work has not been completed, the work is moved by the next specified amount of length (pitch) and stopped, and the process returns to 5) and cutting is repeated.
10) When all work is completed, the operator is notified of the completion.
11) The operator turns off the power switch.
12) The operator removes the automatic wood cutting device 1000;
It is a matter of course that the cut pieces of wood are collected and transported.

FIG. 6 is a diagram showing an embodiment of cutting by attaching the automatic tree cutting device according to the present invention to a tree. The automatic tree cutting device 1000 of FIG. 1 is attached to the tree trunk 600 and is in the middle of cutting.
In 6-A, one slice has already fallen, but such a falling object does not hit the automatic wood cutting device 1000, and there is no danger of damaging the device. In addition, there is no possibility that the saw of the automatic wood cutting device 1000 will receive the weight of the piece of wood that is being cut.
6-B is a cross-sectional view of the automatic tree cutting device 1000 attached to a tree trunk 600. FIG.
Three barring wheels 1210 are attached to the tree trunk 600 . When one tree presser wheel 1210 is placed above the trunk and the lower two tree presser wheels 1210 are arranged on both sides of the trunk, the tree presser wheel 1210 cannot press the trunk at a position above the center of the trunk. can't Preferably, the barring wheel 1210 is below the center of the trunk, although the barring wheel 1210 barely holds down the center of the trunk. This condition is L≧H/2 as shown. L and H are indicated in the figure.
Although the trunk diameter was measured in the flow, the trunk diameter R (diameter) can be obtained from L and H by the following formula, so it is possible without a special measuring instrument.

Equation 1

R = {L ² + (H/2) ² }/L
That is, when pressed against the trunk, L (the distance from the contact point of the upper tree presser to the line connecting the centers of the two lower tree pressers (vertical distance)) and H (the two lower tree pressers) Since we know the distance between the contact points of the presser wheel with the trunk, we can easily calculate the diameter of the trunk, assuming that the cross-section of the tree is circular.

FIG. 7 is a diagram showing an embodiment of the saw section of the automatic tree cutting device according to the present invention.
"The saw unit 1100 includes a saw body 1110, a saw body slider 1120, and a slider position setting means 1130. The saw body 1110 has a saw 1111 and a saw drive means 1112 for driving it. the saw body 1110 is connected to a saw body slider 1120; the saw body slider 1120 has a connection base 1121 to which the saw body 1110 is connected and a slide rail 1122 for sliding thereon;
Furthermore, the slider housing 1120B including the slide rail 1122 is movable in a direction perpendicular to the slide direction, and the means for setting the position (the height direction in this figure) is the slider position setting means 1130. has already been described in the description of FIGS. 1 and 2. Further details are given here.
The same as described above is detailed in FIG. First, the portion enclosed by the dotted line is the details of the saw section 1100 . A slide rail 1122 designated as 1122A is fixed within the slider housing 1120B, and for the purpose of further ensuring operation, a slide rail designated as 1122B is attached outside the slider housing 1120B and connected thereto. 1122 is fixed. A slide block 1123 (1123A, 1123B) attached to the connection base 1121 is movably fitted to each slide rail 1122 . Belts 1140 are connected to both sides of the slide block 1123A, and the belts 1140 are driven by a pulley A1150 and a motor A1160 controlled by a controller 1350. A cross-sectional view of the dotted line is shown in the lower left figure. Since the drawing shows the above in an easy-to-understand manner, the explanation is omitted.

Next, the slider position setting means 1130 will be described. By this means, the position (vertical direction in the figure) of the slider housing 1120B can be adjusted. In this figure, there is a carriage 1132 with a groove 1131 sandwiched between slider housings 1120B, and a fitting portion 1133 fixed to the slider housing 1120B movably fits into the grooves 1131 . A gear 1135 driven by a motor B 1134 fixed to the slider housing 1120B meshes with a plane tooth row on the side surface of the moving table 1132 to form a pinion rack. to move up or down. A carriage 1132 is fixedly connected to the base 1400 .
By means of the above-described means, the height position of the saw body 1110 is set in the figure, and cutting is performed by lateral movement. In FIG. 3, the directions of setting and cutting are opposite to those in FIG.

FIG. 8 is a diagram showing an embodiment of the wood holding portion of the automatic tree cutting device according to the present invention.
8-A shows the wood holding portion 1200A in FIG. 1, and 8-C shows a detailed drawing thereof. Similarly, shown at 8-B is the portion of the wood pressing portion 1200B in FIG. 1, which is shown in detail at 8-D.
In the description of FIGS. 1 and 2, "the wood holding unit 1200 has means 1200A and 1200B. A wood holding wheel 1210 for pressing the surface of the wheel against the surface of the trunk of the tree. 1220 for moving the automatic tree cutting device 1000, and a pusher wheel position setting means 1230 for moving and holding the pusher wheel 1210 against the trunk."
In 8-C, the barring wheel 1210 is indicated by barring wheel 1210A. The rotating shaft of this wheel is bent in an L-shape here to form a wheel support shaft 1231A, and is fitted in a lateral movement block 1232 in a vertically movable state. As shown in the figure, it has a mechanism to prevent it from rotating around the axis. In order to fix the position at the desired height position, a stopper A1233A attached to the lateral movement block 1232 may be engaged with a stop groove A1234A provided on the side surface of the wheel support shaft 1231A. Furthermore, the lateral movement block 1232 is movably fitted in the groove of the guide A 1235A, so that it can move laterally. A stopper C1236 attached to the lateral movement block 1232 can also be pressed against the side surface of the guide A1235A for locking.
It is not always necessary to use both the stopper A and the stopper B, and contact and pressing against the tree is provided between the wheel support shaft 1231A and the lateral movement block 1232, and between the lateral movement block 1232 and the guide A 1235A, such as a spring. It can be performed by pressing means A1239A.
In 8-D,
The barring wheel 1210 is indicated by barring wheel 1210B. The axis of rotation of the wood pressing wheel 1210B is connected to a moving drive means 1220 which is a motor C1220B with a drive mediating means such as a pulley or belt. As shown in this figure, the fixed part for rotatably holding down the rotating shaft and the motor C1220B are fixed on the same board 1237, and the support shaft 1231B is erected at right angles to the board 1237, and the support shaft 1231B moves vertically along the guide B1235B. fit together as much as possible. Incidentally, the stopper C1233B on the guide B1235B can be engaged with the stop groove B1234B on the side surface of the support shaft 1231B. Of course, it is also possible to use a pressing means B1239B such as a spring surrounding the support shaft 1231B between the substrate 1237 and the guide B1235B. A handle A 1238A and a handle B 1238B may be provided to facilitate manual position setting.
Further, although not shown, a motor D and drive means for driving the lateral movement block 1232 of 8-C and a motor E and drive means for vertically driving the support shaft 1231B of 8-D are provided and controlled. , the pressing pressure of the wood pressing wheels 1210A and 1210B to the tree can be adjusted, and the operation described with reference to FIG. 3 can be realized. In this case, the stopper A 1233A, stopper B 1233B, and stopper C 1236 may be omitted. drive means for controlling each stopper from the controller 1350 may be provided.

In addition, in the automatic wood cutting device, when the cut piece of wood falls, there is no device in the falling direction, so there is no danger of hitting the device. Anti-interference means may be provided to push the side towards the falling side.
Also, if there is a ground interference prevention tool 1113 such as a plate attached to the tip of the saw in FIGS. It is convenient because it can be cut. A camera may also be provided to monitor the distance from the ground or stones and provide means for adjusting the position of the saw. Also, if it is determined that interference cannot be avoided, the setting input means can be any setting such as proceeding to the next process by cutting to the extent that interference does not occur, skipping without cutting at that place, or shifting the position as much as possible and cutting. 1310.

As described above, the automatic tree cutting device according to the present invention can avoid the inconveniences of conventional devices and can be configured to be light and small. Since the trees can be cut naturally at intervals and the cut trees can be easily transported, it is particularly effective in the effective use of left-over wood, and is extremely convenient for industrial use.

600
1000 Automatic wood cutting device 1100 Saw part 1110 Saw body 1111 Saw 1112 Saw driving means 1113 Ground interference prevention tool 1120 Saw body slider 1120B Slider housing 1121 Connection base 1122, 1122A, 1122B Slide rails 1123, 1123A, 1123B Slide block 1130 Slider position Setting means 1140 Belt 1150 Pulley A
1160 Motor A
1200, 1200A, 1200B Wood holding parts 1210, 1210A, 1210B Wood holding wheel 1220 Moving drive means 1220B Motor C
1230 Vehicle position setting means 1231A Vehicle support shaft 1231B Support shaft 1232 Lateral movement block 1233A Stopper A
1233B Stopper B
1234A stop groove A
1234B stop groove B
1235A Guide A
1235B Guide B
1236 Stopper C
1237 substrate 1238A handle A
1238B Handle B
1239A pressing means A
1239B pressing means B
1240 Trunk diameter measurement means 1300 Setting/control unit 1310 Setting input means 1320 Cutting completion detection means 1330 Movement amount measurement means 1340 Display means 1350 Controller 1400 Substrate

Claims (11)

It is attached by straddling the trunk of a lying tree, and after the attachment, the operation of moving and cutting on the tree is repeated, and includes a tree holding portion for holding the straddled tree and a saw portion for cutting the tree, a setting/control unit for setting and controlling operations of the wood holding portion and the saw portion; and a base for mounting the wood holding portion, the saw portion, and the setting/control portion,
The tree holding part is a means for holding the tree trunk at least two horizontal positions below the horizontal axis passing through the upper part of the straddling tree and the center of the tree trunk, and at least the upper means is provided with a wheel rotatable in the longitudinal direction on the trunk and means for driving the movement of said wheel, and the means arranged at a position below the horizontal axis constitutes a position setting means for holding the tree pressing wheel against said trunk. death,
The saw unit includes a saw body including a saw for cutting the trunk and a saw driving means for driving the saw, a connection base to which the saw body is connected, and a slide rail for sliding the connection base. a slider, and slider position setting means for making the slide rail movable in a direction perpendicular to the direction of the slide and for giving the movable position,
The setting/control unit includes setting input means for setting at least an interval between cuttings (or a cutting pitch) for cutting the tree, display means for displaying setting items during the setting, and Cutting completion detecting means for detecting whether the cutting is completed; Movement amount measuring means for detecting whether the distance that the car has moved in the longitudinal direction on the trunk matches the interval between the cuttings; and the setting means. , a controller for controlling the display means, the cutting completion detecting means, the moving amount measuring means, the saw section, and the tree holding section. 3. The means of the upper part of the tree holding part and the means arranged below the horizontal axis have means for moving vertically and horizontally and for applying pressure to the trunk. 2. The automatic wood cutting device according to 1. As a means arranged at a position below the horizontal axis, the distance between the horizontal and at least two positions of the wooden holding parts is H, and the wooden holding part on the upper part of the straddling tree and the wooden holding parts at the two positions 3. The automatic tree cutting device according to claim 1, wherein L.gtoreq.H/2, where L is the distance from the horizontal line connecting the sections. The setting/controlling section of claim 1 or claim 2 has trunk diameter measuring means for measuring the trunk of the tree, or the tree holding section of claim 3 has R={L ² +( H/2) ² }/L. The tree retainer has means for reducing the pressure on the trunk when moving in the longitudinal direction on the trunk and increasing the pressure on the trunk when stopping and cutting the trunk. The automatic tree cutting device according to any one of claims 2 to 4. The means on the upper part of the wood holding part and the means arranged below the horizontal axis can be engaged and disengaged for moving in the vertical and horizontal directions and stopping and holding the pressing position. 6. The automatic tree cutting device according to any one of claims 2 to 5, further comprising a stopper. 7. The automatic tree cutting apparatus according to claim 6, further comprising a drive means for engaging and disengaging said stopper and controlled by said controller. 8. The automatic tree cutting apparatus according to any one of claims 1 to 7, wherein the setting values for the interval between cuttings by the setting input means are a plurality of different values.
9. The apparatus according to claim 1, further comprising interference prevention means for preventing the falling tree from hitting the cutting device by pushing the side of the tree to be cut toward the falling side. 1. An automatic tree cutting device according to claim 1. 10. A wooden automatic machine according to any one of claims 1 to 9, wherein a ground interference prevention device for preventing the contact is provided between the ground and the saw on the side where the saw contacts the ground. cutting device. The setting input means is equipped with a camera to monitor the distance from the ground or stones, and provides means for adjusting the position of the saw, or proceeds to the next step by cutting to the extent that it does not hit the ground or stones. 11. The method according to any one of claims 1 to 10, characterized in that it is possible to set whether to skip without cutting at the monitoring location, or to cut by shifting the position as much as possible. Automatic wood cutting device.

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