JP7138893B2 - Collecting device - Google Patents

Description

The present invention relates to a material collection device.

Until now, as a means of transporting felled timber to the timber collection point, timber collection by helicopter and timber collection using overhead wires such as wires have been used. It is not suitable for timber collection such as thinned timber, which is cheaper than In addition, collecting materials using overhead lines such as wires requires a lot of labor for erection, removal, replacement, and the like.

Therefore, an overhead wire collection using a self-propelled tower yarder having a tower has been proposed. In the overhead wire collection using a tower yarder, the tower yard is self-propelled to the collection site, a wire is stretched between the tower and the front pillars of trees, etc. in the logging area, and the felled trees are placed on a carrier suspended on the wire. After being fixed and held, the carrier is moved to collect the felled trees at a logging site (see Patent Document 1, for example).

However, in the overhead wire collection using a tower yarder, it is necessary to establish a work road on which the tower yarder can move to the collection site, which incurs an initial cost. Also, in steep mountains and forests, the area where a tower yarder can be used is limited because a work road cannot be built.

Therefore, the present inventor developed and proposed a portable overhead wire collecting device that does not require a work road and can be installed at a desired position even in a steep mountain forest (Patent Document 2).

JP 2015-214419 A JP 2018-184298 A

According to the overhead wire logging device proposed above, it has become possible to gather logs even in places where it was difficult to gather logs using equipment in the past. It was found that it takes time and labor to install the device in areas with high planting density.

Accordingly, an object of the present invention is to enable easy and quick installation of a device even in a steep mountain forest or in an area with a high density of trees, and even in a place with many obstacles such as fallen trees and rocks. To provide a portable logging device capable of efficiently gathering logs.

A portable lumber collecting device according to the present invention for achieving the above object is a portable lumber collecting device for moving felled trees to a desired position, which can be erected at a desired position and can swing around its root. a tower body, a first wire and a second wire sent out from the tip of the tower body, the free end side of which is directly or indirectly fixed to the felled tree, a winding of the first wire and the second wire, and A first winch and a second winch that are extended, a third wire stretched between the tower body and a first support column existing around the tower body, and the tower body and the surroundings of the tower body A fourth wire stretched between the existing second support column, a third winch and a fourth winch for winding and feeding the third wire and the fourth wire, and the first winch and / or the second winch The orientation and movement direction of the felled tree are adjusted by two winches and the third winch and/or the fourth winch, and the felled tree is moved to a desired position.

In the above-configured wood collecting device, the first to fourth winches may be detachable from the tower body.

Further, in the above-configured wood collecting apparatus, the first to fourth winches may be configured to be driven by DC motors.

Further, in the above-configured wood collecting apparatus, each of the first to fourth winches may be configured to be driven by a plurality of DC motors.

Further, the harvesting apparatus having the above configuration may further include a remote control device, and the remote control device may be configured to operate the winding and unwinding of the first to fourth winches.

INDUSTRIAL APPLICABILITY The lumber collection device of the present invention can be installed easily and quickly even in areas with steep mountain forests and densely planted trees. In addition, even in a place with many obstacles such as fallen trees and rocks, timber can be collected efficiently. As a result, the cost and labor required for collection can be reduced.

1 is a perspective view showing a usage state of a harvesting device according to the present invention; FIG. It is the figure which looked at the tower main body from the left side. It is a figure explaining the structure of a 1st winch. It is explanatory drawing of a fixture. It is the figure which looked at the material collecting apparatus of FIG. 1 from the front side. FIG. 4 is a plan view for explaining a method of collecting wood using the wood collecting device according to the present invention; FIG. 4 is a state diagram of loading felled trees on a cart using the lumber collecting device of the present invention. FIG. 5 is a plan view for explaining another method of collecting materials using the collecting device according to the present invention.

The collecting device according to the present invention will be described in more detail below with reference to the drawings, but the present invention is not limited to these examples. In addition, the front-rear direction, the left-right direction, and the up-down direction in each figure shall refer to each direction shown in each figure.

(First embodiment)
FIG. 1 shows a perspective view showing a usage state of a material collecting device T according to the present invention. The material collecting device T of the present invention is portable, and parts such as the tower body 1, the first winch 41 to the fourth winch 44, the first wire W1 to the fourth wire W4, etc., which will be described later, are shown in FIG. It is placed on a temporary single-rail cart (hereinafter sometimes referred to as "truck") 5 and transported to a desired logging location, where it is assembled and used.

The stacking device T of the present invention includes a tower body 1, first to fourth winches 41 to 44 detachably provided to the tower body 1, and winding by these first to fourth winches 41 to 44. and a first wire W1 to a fourth wire W4 that are paid out. Each component will be described below.

(Tower body)
FIG. 2(a) shows a view from the left side. The tower body 1 consists of a cylindrical metal pole. A ring-shaped body 15 and a ring-shaped body 16 are detachably attached to the upper end of the tower body 1 by a clamp CL1 and a clamp CL2. A pulley 11 and a pulley 12 and a pulley 13 and a pulley 14 are detachably attached to each of the rings 15 and 16, respectively. In FIG. 2, the rings 15 and 16 and the pulleys 11 to 14 are drawn larger than the tower body 1 in order to facilitate understanding.

A stopper plate 17 having a through hole 17a through which the tower body 1 can be inserted is attached to the lower end of the tower body 1. As shown in FIG. After the tower body 1 is transported to the lumber collection site, the lower end is driven into the ground by about ten and several centimeters and erected. A maximum load of several hundred kilograms is applied to the tower body 1 in the timber collection work, which will be described later. The stopping plate 17 is for preventing sinking into the ground even when a large load is applied to the tower body 1, and is in contact with the ground surface after the tower body 1 is erected at a predetermined position. A clamp CL3 is attached to the top of the stop plate 17 to prevent the stop plate 17 from moving upward along the tower body 1 . As a result, the stopping plate 17 acts as a resistance against sinking of the tower body 1, and sinking of the tower body 1 is suppressed.

Further, when a large load is applied to the tower body 1, the tower body 1 may be distorted. In order to increase the strength of the tower body 1, it is conceivable to use a strong material for the poles or increase the thickness of the poles. However, such countermeasures may raise new problems, such as a dramatic increase in cost, or a heavy weight that makes it unsuitable for transportation on steep mountains. Therefore, in such a case, as shown in FIG. 2(b), an auxiliary pole 1S that is shorter in the longitudinal direction than the pole of the tower body 1 is prepared, and this auxiliary pole 1S is clamped to the tower body 1 as necessary. The CL6 may be used for connection to reinforce the tower body 1 against distortion. Such reinforcement by the auxiliary poles 1S suppresses the increase in cost, and also makes it possible to transport the tower main body 1 and the auxiliary poles 1S as separate bodies to the gathering place, which causes a heavy burden on the transportation work. do not have.

(1st winch, 2nd winch)
A first winch 41 and a second winch 42 are detachably provided on the upper part of the tower body 1 . A first wire W1 and a second wire W2 are wound around the wire drums 416 (shown in FIG. 3) of the first winch 41 and the second winch 42 so as to be wound and unreeled. The first wire W1 and the second wire W2 pulled out from the first winch 41 and the second winch 42 rise upward along the tower body 1 and are changed in direction by the pulley 11 and the pulley 12. Fixtures 9a and 9b (hereinafter sometimes collectively referred to as "fixtures 9") for fixing the felled tree TR are attached via hooks F. As shown in FIG. The length of the first wire W1 and the second wire W2 pulled out from the first winch 41 and the second winch 42 may be appropriately determined in consideration of the size of the felled tree TR to be drawn and the topography of the forest. It is about 200m.

FIG. 3 shows a structural diagram of the first winch 41. As shown in FIG. The second winch 42 is mounted in the same case 411 with the same structure as the first winch 41 and symmetrically. A third winch 43 and a fourth winch 44, which will be described later, have the same structure as the first winch 41 and the second winch.

A drive shaft 412 is attached to the central portion in the front-rear direction and the upper portion in the vertical direction within a substantially rectangular parallelepiped case 411 . The drive shaft 412 has a left end located inside the case 411 and a right end protruding outward from a through hole (not shown) formed in the right side of the case 411 . A worm wheel 415 is fixed to the left end of the drive shaft 412, and a wire drum 416 and a pair of guides larger in diameter than the wire drum 416 provided at the right and left ends of the wire drum 416 are provided at the right end of the drive shaft 412. Discs 417a and 417b are fixed. A wire W1 is wound around the wire drum 416 .

In the case 411, two DC motors M1 and M2 (four in total including the motor of the second winch 42) are arranged symmetrically in the longitudinal direction. A worm 414 is attached to the output shaft 413 of the motors M1 and M2 projecting upward. The worm 414 meshes with the worm wheel 415 at substantially symmetrical positions on the outer periphery thereof.

In the first winch 41 having such a structure, when a DC voltage is applied to the motors M1 and M2, the output shafts 413 of the motors M1 and M2 rotate in the same direction. This causes the two worms 414 to rotate and the worm wheel 415 to rotate. Then, the drive shaft 412 and the wire drum 416 fixed to the drive shaft 412 are rotated to feed or wind the wire W1. On the other hand, when a direct current of opposite polarity is applied to the motors M1 and M2, the rotation direction of the output shafts 413 of the motors M1 and M2 is reversed, and the wire drum 416 rotates in the reverse direction to wind the wire W1. is brought out. As long as it is possible to move the felled tree TR, the number of motors may be one or three or more.

The first winch 41 and the second winch 42 are independently driven by two DC motors M1 and M2, respectively. The power source is preferably a battery. In this case, when the felled tree TR is transported by the trolley 5, the trolley 5 travels down the forest at a safe speed while being braked by the drive motor. The drive power for the winch 41 to the fourth winch 44 can be almost covered.

Further, each of the first to fourth winches 41 to 44 is driven and stopped by a remote controller (remote control device) RC at hand of the operator.

(Fixture)
FIG. 4 shows a structural diagram of the fixture 9 attached to the ends of the first wire W1 and the second wire W2. The fixture 9 includes an L-shaped main body frame 91 , a moving frame 92 movably attached to a longitudinal portion 911 of the main body frame 91 , and clamping screw members 93 supported by the moving frame 92 . A clamping portion 913 is formed at the distal end portion of the short portion 912 of the body frame 91 to clamp the felled tree TR. A mounting portion 914 to which the hook F is mounted is provided at substantially the central portion of the longitudinal portion 911 . The moving frame 92 includes a base portion 921 having a through hole 924 through which the longitudinal portion 911 of the body frame 91 can be inserted, and a support portion 922 having a through hole 925 into which a female screw is threaded and into which the screw member 93 is screwed. and a connection portion 923 that connects the base portion 921 and the support portion 922 . The screw member 93 has a pointed portion 931 at its tip, and a brim portion 933 between the pointed portion 931 and the screw portion 932 .

When fixing the fixture 9 to the felled tree TR, the moving frame 92 is attached to the body frame 91 so that the distance between the holding portion 913 of the body frame 91 and the screw member 93 of the moving frame 92 is equal to or larger than the diameter of the felled tree TR. along the length of the Next, after the felled tree TR is positioned between the holding portion 913 of the body frame 91 and the screw member 93 of the moving frame 92, the moving frame 92 is moved in a direction to approach the felled tree TR. Then, the screw member 93 is rotated in a direction approaching the felled tree TR, and the pointed portion 931 of the screw member 93 is bitten into the felled tree TR, and the cutting is performed between the flange portion 933 and the clamping portion 913 of the body frame 91. To firmly hold a fallen tree TR. An impact wrench is preferably used for tightening and loosening the screw member 93 from the standpoint of workability, etc. in a felling area such as a steep slope.

(3rd winch, 4th winch)
A third winch 43 and a fourth winch 44 are detachably provided at the bottom of the tower body 1 . The third wire W3 pulled out from the third winch 43 rises upward along the tower body 1 and is redirected by the pulley 13, and the tip of the third wire W3 is positioned behind the tower body 1 and serves as a first support column. 31 and fixed. The fourth wire W4 pulled out from the fourth winch 44 also rises upward along the tower body 1 and is changed in direction by the pulley 14, and its tip is positioned behind the tower body 1 as a second support column. It is wrapped around the tree 32 and fixed. The trees 31 and 32 as the first and second support columns are desirably selected so as to be symmetrical in the horizontal direction with the tower body 1 as the center in FIG. If there is no tree suitable for winding the ends of the third wire W3 and the fourth wire W4, artificial posts may be provided as the first and second support posts.

The third wire W3 and the fourth wire W4 are wound by the third winch 43 and the fourth winch 44 to generate tension and support the tower body 1 in the standing state. Here, the standing angle of the tower body 1 can be adjusted by further winding and/or unwinding the third wire W3 and the fourth wire W4 with the third winch 43 and the fourth winch 44 . That is, if the third wire W3 and the fourth wire W4 are further wound by the third winch 43 and the fourth winch 44, the tower body 1 is tilted backward around the lower end, and conversely, the third wire W3 and the fourth wire W4 are wound. from the third winch 43 and the fourth winch 44, the tower body 1 tilts forward about the lower end. Further, if the third wire W3 is wound by the third winch 43 and the fourth wire W4 is let out from the fourth winch 44, the tower body 1 is tilted to the right from the lower end. When the fourth wire W4 is let out from the third winch 43 and wound by the fourth winch 44, the tower body 1 is tilted to the left with the lower end as the center.

(conveyance)
As described above, the portable log collection device T of the present invention is transported to a desired position by the carriage 5 shown in FIG. 1 or the like, assembled at the position, and used. After use, it is disassembled into parts and removed by the truck 5. - 特許庁In addition, the truck 5 loads felled trees drawn by the lumber collection device T of the present invention and conveys them to the soil site. The trolley 5 will be briefly explained.

The carriage 5 runs by itself while pressing a single rail 61 provided on the rail unit 6 with a plurality of built-in driving wheels. The traveling and stopping of the carriage 5 are performed by remote control by an operator, and are set to automatically stop when the carriage 5 reaches a predetermined position, for example, the extreme end of a plurality of rail units 6 connected together.

One rail unit 6 has a length of about several meters, and a single track is formed by connecting a plurality of units in the longitudinal direction from the land site where the felled trees TR are collected and transported by truck or the like to the logging area. be done. The rail unit 6 includes a single rail 61 and a lower frame 62 having a circular cross section and arranged in parallel with each other at a predetermined distance in the vertical direction. It has a vertical member 63 and a diagonal member 64 provided in the shape of a "V". A carriage 5 is attached so as to straddle the single rail 61 .

Since the rail unit 6 needs to be installed vertically, the area where the rail unit 6 is installed is a sloped land such as a mountain forest. After adjusting the angle of the rail unit 6 to be vertical by rocking the unit 6, it is fixed. When the ground strength is weak, auxiliary piles are further driven into the ground and connected to the support piles 65 for reinforcement. The rail unit 6 can be connected in the longitudinal direction, and there is no limit to the extension distance. Therefore, it is possible to install the rail unit 6 in a loop shape, for example, and in this case, a plurality of trucks 5 can be run simultaneously. The rail unit 6 and the support piles 65 are portable, and when the logging work is completed, they are removed and transported to the next logging work area for installation.

(Method of collection, raising from the bottom of the slope to the top)
Next, a collection method using the collection device T configured as described above will be described with reference to FIG. FIG. 6 is a plan view of the logging device T installed in the logging area. In this figure, the first winch 41 to fourth winch 44, the pulleys 11 to 14, etc. are omitted. Also, the lumber shown in this figure assumes the case of pulling up the felled tree TR from the bottom of the slope or the case of pulling the felled tree on a relatively flat land. Moreover, the front-rear direction and the left-right direction refer to the directions shown in FIG.

As shown in FIGS. 1 and 6, the tower body 1 is erected at a predetermined position in the forest, and the first winch 41 to fourth winch 44 are attached to the upper and lower ends of the tower body 1 . Then, a third winch 43 stretches a third wire W3 between the tower body 1 and the tree 31 as the first support column, and a fourth winch 44 connects the tower body 1 and the tree 32 as the second support column. A fourth wire W4 is stretched between them, and the tower body 1 is erected so that the inclination can be freely changed with the lower end part as a fulcrum. Next, the first wire W1 and the second wire W2 are let out from the first winch 41 and the second winch 42, and the fixtures 9a and 9b attached to the tips of the first wire W1 and the second wire W2 are attached to the felled tree TR. Attach to both ends in the longitudinal direction.

Next, the first winch 41 and the second winch 42 are driven to wind the first wire W1 and the second wire W2 to draw the felled tree TR toward the tower body 1 . At this time, by individually driving the first winch 41 and the second winch 42, it is possible to change the position of the felled tree TR to a desired position. As a result, when there are trees, rocks, or the like that obstruct the movement of the felled tree TR on the movement path, the felled tree TR can be moved smoothly by changing its posture so as to avoid the obstacles. can.

Specifically, with reference to the plan view of FIG. 6, when pulling up a felled tree TR whose longitudinal direction is substantially perpendicular to the pulling direction, the first winch 41 and the second winch 42 are driven to drive the first winch 41 and the second winch 42. When the first wire W1 and the second wire W2 are wound at the same speed, the felled tree TR is drawn toward the tower body 1 while maintaining its initial posture (indicated by the broken line in FIG. 6) (FIG. 6(a)).

On the other hand, when the first wire W1 is wound at a faster speed than the second wire W2, the end of the felled tree TR to which the first wire is attached becomes the head in the drawing direction, and finally the longitudinal direction of the felled tree TR becomes It is also possible to adopt a posture in which the direction is substantially parallel to the attracting direction (FIG. 6(b)). In addition, when viewed in the vertical direction, the end portion of the felled tree TR to which the first wire is attached is lifted upward. The angle of the felled tree TR with respect to the pulling direction can be adjusted by the winding speed difference and the winding time between the first wire W1 and the second wire W2. Even when the second wire W2 is wound at a faster speed than the first wire W1, the direction of rotation of the felled tree TR is reversed, and the end side to which the second wire is attached becomes the head in the drawing direction. In the same way as described above, the longitudinal direction of the felled tree TR can be finally made substantially parallel to the drawing direction.

When the felled tree TR is pulled toward the tower body 1, the third winch 43 and the fourth winch 44 are driven to wind and feed the third wire W3 and the fourth wire W4, thereby tilting the tower body 1. By changing , it is also possible to change the path along which the felled tree TR is drawn in the horizontal direction (FIG. 6(c)). FIG. 6C shows the case where the third wire W3 is let out from the third winch 43 and the fourth wire W4 is wound around the fourth winch 44 so that the tower body 1 is tilted leftward when viewed from the front. As a result, the felled tree TR is drawn along the left side of the base of the tower body 1 as viewed from the front, compared to the case of FIGS. 6(a) and 6(b).

In this manner, the first to fourth wires W1 to W4 are wound and fed out by driving and stopping the first to fourth winches 41 to 44, respectively, so that the felled tree TR can be drawn in a desired posture and path. become. Then, as shown in FIG. 7, the felled tree TR drawn to the vicinity of the tower body 1 is suspended above the carriage 5 by the first wire W1 and the second wire W2, and moved to the third winch 43 and the fourth winch 44. , the third wire W3 and the fourth wire W4 are wound and fed out to adjust the erection angle of the tower body 1 and loaded on the upper surface of the carriage 5. - 特許庁

When the felled tree TR is loaded on the carriage 5, the fixtures 9a and 9b are removed from the felled tree TR and moved again to the position of the next felled tree TR. Then, the fixtures 9a and 9b are fixed to both ends of the felled tree TR in the longitudinal direction in the same manner as described above, and the next fallen tree TR is pulled toward the tower body 1 and loaded onto the truck 5. FIG. When a predetermined number of felled trees TR are loaded on the truck 5, they are transported to a predetermined soil site by the truck 5. - 特許庁This series of logging operations is repeated, and when all felled trees that can be harvested are collected, the logging device T is disassembled, transported to the next logging location, assembled, and a new logging operation is performed. .

(Method of collection, drawing from top to bottom of slope)
The harvesting shown in FIG. 8 is based on the assumption that the felled trees TR are drawn from the top to the bottom of the slope. The front-rear direction and the left-right direction refer to the directions shown in FIG.

When the felled tree TR is pulled downward from the slope, unlike the case where the felled tree TR is pulled upward from the bottom of the slope, it is not necessary to apply a large force to the felled tree TR because the fallen tree TR easily slides down the slope due to its own weight. It is important to control the fallen tree TR so that it slides down in a desired direction at a desired speed.

Referring to FIG. 8, first, a pulley 35 is attached by winding a wire 34 around a tree 33 as a support column positioned above the felled tree TR on the slope. If there are no trees suitable for supporting posts, artificial posts can be installed. Then, the first wire W1 is let out from the first winch 41, the direction is changed by the pulley 35, and the fixture 9a attached to the tip of the first wire W1 is attached to the front end of the felled tree TR. Further, the second wire W2 is let out from the second winch 42, and the fixture 9b attached to the tip of the second wire W2 is attached to the rear end of the felled tree TR (FIG. 8(a)). Basically, the movement direction of the felled tree TR is controlled by winding the second wire W2 by the second winch 42, and the movement speed (sliding speed) of the felled tree TR is controlled by the first wire W1 being paid out by the first winch 41. Control. Of course, individually and specifically, the first wire W1 and the second wire W2 are wound and/or fed out by the first winch 41 and the second winch 42 in cooperation with each other to move the felled tree TR in a predetermined direction at a predetermined speed. move.

In order to prevent the wires W1 and W2 and the felled tree TR from coming into contact with other trees or the like as much as possible, the tower body 1, the first wire W1, the tree 33, the felled tree TR, and the second wire W2 are formed. It is preferable that there are no obstacles such as trees in the closed loop. The direction is changed in the direction of TR.

Next, the second winch 42 is driven to wind the second wire W2. As a result, the rear end side of the felled tree TR faces the direction of the tower body 1 (FIG. 8(b)). At this time, the first winch 41 is in a stopped state. As a result, even if the second wire W2 is wound by the second winch 42 and a force is applied to the felled tree TR in the downward direction of the slope, the front end of the felled tree TR is maintained by the first wire W1. does not slide down slopes.

Then, the winding of the second wire W2 by the second winch 42 and the feeding out of the first wire W1 by the first winch 41 are coordinated to draw the felled tree TR toward the tower body 1 (FIG. 8(c)). .

In the embodiment shown in FIG. 8, the direction of the first wire W1 is changed by winding the wire 34 around the tree 33 serving as the support column positioned above the felled tree TR and attaching the pulley 35. , Based on the positional relationship between the felled tree TR and the surrounding trees, etc., after a plurality of trees (support columns) located above the felled tree TR are provided with pulleys to change the direction of the first wire W1 a plurality of times. , the tip of the first wire W1 may be attached to the front end of the felled tree TR via the fixture 9a.

In the case of the embodiment shown in this figure, after pulling the felled tree TR toward the tower body 1, the fixtures 9a and 9b at the ends of the first wire W1 and the second wire W2 are removed, and the next fallen tree TR is moved. When moving the fixture 9b to the fixture 9a, the fixture 9b is connected to the fixture 9a and the first wire W1 is wound by the first winch 41, thereby moving the fixtures 9a and 9b to the vicinity of the next felled tree TR manually. It is possible to move without

Although the embodiments of the logging device according to the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and additions are possible as long as the effects of the present invention are exhibited.

INDUSTRIAL APPLICABILITY The lumber collection device of the present invention can be installed easily and quickly even in areas with steep mountain forests and densely planted trees. In addition, even in a place with many obstacles such as fallen trees and rocks, timber can be collected efficiently. As a result, the cost and labor required for collection can be reduced.

T Timber collection device 1 Tower main body 5 Cart 6 Rail unit 9, 9a, 9b Fixture 31 Tree (first support column)
32 trees (second support pillars)
41 First winch 42 Second winch 43 Third winch 44 Fourth winch 61 Single rail 62 Lower frame 63 Vertical member 64 Diagonal member 65 Support pile 412 Drive shaft 414 Worm 415 Worm wheel 416 Wire drums M1, M2 DC motor W1 First Wire W2 Second wire W3 Third wire W4 Fourth wire RC remote controller (remote control device)
TR felled tree

Claims (5)

A portable logging device that moves felled trees to a desired position,
a tower body that can be erected at a desired position and that can freely swing about its base;
a first wire and a second wire, which are sent out from the tip of the tower body and whose free ends are directly or indirectly fixed to the felled tree;
a first winch and a second winch for winding and feeding the first wire and the second wire;
a third wire stretched between the tower body and a first support column existing around the tower body;
a fourth wire stretched between the tower body and a second support column existing around the tower body;
A third winch and a fourth winch for winding and feeding the third wire and the fourth wire,
A lumber collecting device characterized by adjusting the orientation and movement direction of felled trees by means of a first winch and/or a second winch and a third winch and/or a fourth winch to move the felled trees to a desired position. The logging device according to claim 1, wherein the first winch to the fourth winch are detachable from the tower body. 3. The material collecting device according to claim 1, wherein the first winch to the fourth winch are driven by DC motors. 4. The material collection device according to claim 3, wherein each of the first to fourth winches is driven by a plurality of DC motors. Equipped with a remote control device,
The harvesting device according to any one of claims 1 to 4, wherein the first to fourth winches are operated for winding and unwinding by the remote control device.

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