JP3035339U - Tree cutting device - Google Patents

Abstract

(57) Abstract: To provide a tree cutting device capable of discharging chips (wood chips) with less power and having no adverse effect due to generation of fine powder. A tree cutting device according to the present invention includes a tree intake section, a conveyance section, a cutting section 5, and a discharging section 6.
The cutting unit 5 has a chipper disk 17. An opening 29 is formed in the tipper disk 17 at a symmetrical position, a knife 20 is provided on the front side of the opening 29, and a guide member 21 is provided on the rear side. The guide member 21 is
The tip, which has an L-shaped cross section and is cut by the knife 20, passes through the opening 29, is guided by the guide member 21 and is directly sent to the discharge portion 6, and is discharged to the outside via the discharge pipe 37 of the discharge portion 6. To release.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a tree cutting device that cuts a tree and processes it into chips.

[0002]

[Prior art]

 A tree cutting device is known that cuts trees such as felled trees, thinned trees, fallen trees, and driftwood into chips. This tree cutting device throws the tree into the cutting unit at the rear, sends the tree to the cutting unit in the conveying unit, cuts the tree into chips with a rotating knife of the cutting unit, and cuts the chips from the discharging unit. It is designed to be released to the outside.

Such a tree cutting device is used at a work site such as in a forest, and since wood chips cut into chips are directly diffused and accumulated on the ground at the site, they are released farther with less power. Preferably.

By the way, in the conventional tree cutting device, the cut chips (wood chips) are once accumulated on the bottom of the housing surrounding the cutting portion, and the accumulated chips are picked up again by the discharge blade, and then discharged from the discharging portion. It was released to the outside.

However, since the chip discharge rate from the tip of the discharge tube needs to be 3000 m / min or more, a large amount is required in order to finally discharge the chips in a state of once being deposited and standing still at the above discharge rate. I needed a lot of power.

Further, when picking up the once accumulated chips by the discharging blade, the discharging blade causes the phenomenon of dragging of the chips, thereby generating fine powder. There is a problem in that the fine powder is clogged or adheres to each part of the device, resulting in a malfunction of each part of the device, and a time and labor required for the removal and cleaning work.

[0007]

[Problems to be solved by the device]

 The present invention has been made in view of the above-mentioned problems, and an object thereof is to efficiently discharge a cut chip (wood chip) with lower power, and an apparatus that generates fine powder. (EN) A tree cutting device capable of preventing or suppressing inconveniences such as clogging of each part.

[0008]

[Means for Solving the Problems]

 Such an object is achieved by the present invention of the following (1) to (10).

(1) In a tree cutting device including an intake section of a tree to be cut, a transport section, a cutting section, and a discharging section for discharging a cut piece of wood, the cutting section is provided after cutting the tree. A tree cutting device, which is configured to directly feed a piece of wood to the discharging unit.

(2) In a tree cutting device including an intake section for a tree to be cut, a transport section, a cutting section, and a discharge section for discharging a cut piece of wood, the cutting section cuts the tree. A tree cutting device, comprising a rotating disk provided with a knife and a guide member for guiding a piece of wood immediately after cutting to the discharging section.

(3) The rotating disk has at least one opening, and the knife and the guide member are installed on different surface sides of the rotating disk and in the vicinity of the opening. The tree cutting device according to (2) above.

(4) The tree cutting according to (2) or (3) above, wherein the rotating disk has a plurality of openings, and the knife and the guide member are installed in each opening. apparatus.

(5) The tree cutting device according to (4), wherein the opening is provided at a symmetrical position with respect to the rotation axis of the rotating disk.

(6) The tree cutting device according to any one of (3) to (5), wherein the opening area of the opening differs between one surface and the other surface of the rotating disk.

(7) The guide member has a portion that covers the opening, and is shaped so as to form an opening toward the front in the rotation direction of the rotating disk. The tree cutting device according to any one of (6).

(8) The guide member is a substantially L-shaped member having a long portion that is substantially parallel to the rotating disk and a short portion that bends with respect to the long portion. The tree cutting device according to any one of (7).

(9) The cutting unit has a housing that houses at least a part of the rotating disk and has a circular arc-shaped portion along the outer circumference of the rotating disk (1). The tree cutting device according to any one of 1.

(10) The transporting unit according to any one of (1) to (9) above, wherein the transporting unit has a pair of wheels that sandwich a tree, and a drive unit that rotationally drives the wheels in mutually opposite directions. Tree cutting device.

[0019]

[Embodiment of the invention]

 Hereinafter, the tree cutting device of the present invention will be described in detail with reference to the preferred embodiments shown in the accompanying drawings.

FIG. 1 is an overall perspective view of a tree cutting device 1 of the present invention. In addition, the right side in FIG. 1 will be described as “front” or “front” and the left side as “rear” or “rear”.

As shown in FIG. 1, the tree cutting device 1 mainly includes an intake section 3 mounted on the rearmost portion of the main frame 2, a transport section 4 adjacent to the front of the intake section 3, and a transfer section 4 adjacent to the intake section 3. It is composed of a cutting section 5 adjacent to the front of the transport section 4 and a discharging section 6 provided on the cutting section 5.

The intake part 3 is for taking in a tree (workpiece) to be cut, and is composed of a supply chute that gradually expands from the main frame 2 toward the rear. A front square inlet 7 is opened at the rear end surface of the intake unit 3, and the frontmost surface of the intake unit 3 is connected to the transport unit 4. The tree introduced from the intake 7 is sent forward, and along the four slanted inner surfaces of the supply chute, the center portion, that is, the lower feed wheel 9 and the upper feed wheel 1 of the transport unit 4 described later. Collected between 0.

As shown in FIG. 2, the transport section 4 mainly includes a fixed wheel box 8, a lower feed wheel 9, an upper feed wheel 10, and two hydraulic motors (rotatingly driving the wheels 9 and 10). Drive means) 11 and 12.

The fixed wheel box 8 is a slightly thin box body connected to the forefront of the intake section 3 and extending in the vertical direction in FIG. It is located in Further, slits (grooves) 13 and 13 are formed at predetermined positions on the side surface of the fixed wheel box 8.

At the lower part of the fixed wheel box 8, a lower feed wheel 9 is installed between both side surfaces thereof. The lower feed wheel 9 is rotatably supported by bearings 14 and 14 installed on both sides of the lower portion of the fixed wheel box 8, and the rotation axis of the lower feed wheel 9 passes through the slits 13 and 13. Further, the lower feed wheel 9 is arranged so as to be orthogonal to the direction of introducing the tree from the intake portion 3 and the longitudinal direction of the fixed wheel box 8. Further, the lower feed wheel 9 is rotationally driven by a hydraulic motor 11 provided outside the one bearing 14.

The upper feed wheel 10 is installed on the lower end of an upper slide box 15 having a substantially U shape. The upper feed wheel 10 is rotatably supported by bearings 16 and 16 installed on both lower side surfaces of the upper slide box 15. The upper feed wheel 10 is also rotationally driven by the hydraulic motor 12 provided outside the one bearing 16.

The upper slide box 15 is loaded into the fixed wheel box 8 from above the fixed wheel box 8. At this time, the rotating shaft of the upper feed wheel 10 passes through the slits 13, 1.

With the upper slide box 15 loaded in the fixed wheel box 8, the lower feed wheel 9 and the upper feed wheel 10 are arranged parallel to each other. Further, the installation interval between the lower feed wheel 9 and the upper feed wheel 10 is set as desired. This installation interval can be adjustable depending on the thickness and amount of trees.

The lower feed wheel 9 and the upper feed wheel 10 rotate in opposite directions so that the tree from the intake section 3 can be sandwiched between them and sent to the cutting section 5 to be described later. To be done.

On the outer peripheral surfaces of the lower feed wheel 9 and the upper feed wheel 10, there are formed ridges 9a and 10a, respectively, which extend along the rotational axis direction. When the tree is sandwiched between the lower feed wheel 9 and the upper feed wheel 10 which rotate in opposite directions, frictional resistance increases due to the ridges 9a and 10a, and the tree is reliably conveyed to the cutting unit 5 described later. It

As shown in FIG. 3, the cutting part (chipper) 5 mainly includes a chipper disk (rotating disk) 17, a chipper housing 18 surrounding a part of the chipper disk 17, an inlet 19, and a chipper. It comprises a knife 20 and a guide member 21 installed on the disk 17, and a drive mechanism 22 for rotating the chipper disk 17.

The chipper disk 17 is a disk-shaped member having a shaft 23 at the center, and the lower half thereof is housed in the chipper housing 18. The chipper housing 18 covers the lower half of the chipper disk 17 in a non-contact manner, and is formed in an arc shape so as to correspond to the outer circumference of the chipper disk 17. As a result, the chips can be efficiently delivered to the discharge part 6.

At the center of the upper portion of the chipper housing 18, a pair of opposing mounting portions 24, 24 are provided. Bearings 41, 41 are provided on the mounting portions 24, 24, respectively, and the shaft 23 of the chipper disk 17 is rotatably supported by the bearings 41, 41. That is, the chipper disk 17 is configured to rotate inside the chipper housing 18 without contacting the chipper housing 18.

Further, on the front surface of the chipper housing 18, an introduction port 19 for introducing the tree conveyed by the conveying section 4 is provided. The introduction port 19 communicates with the inside of the chipper housing 18, and the communicating portion faces the lower part of the chipper disk 17 in FIG.

A pair of openings 29 and 29 are formed in the chipper disk 17 at symmetrical positions with the shaft 23 in between (see FIG. 4). The openings 29, 29 are formed so as to extend in the radial direction of the chipper disk 17.

The openings 29, 29 are formed such that the front opening 30, 30 on the front side of the disk has a small opening area and the rear openings 31, 31 on the rear side of the disk have a large opening area. That is, the edge of the opening 29 on the side opposite to the knife 20 is a tapered surface 29a inclined by a predetermined angle with respect to the thickness direction of the chipper disk 17. With such a structure, the emission efficiency of chips (wood chips) is further improved.

In the vicinity of the openings 29, 29, knives 20, 20 for cutting (crushing) a tree into chips are installed, respectively. The knife 20 is attached to the chipper disk 17 by a bolt 32 so that its cutting edge 201 faces the front opening 30. The bolt 32 is screwed into the nut 33 on the rear surface side of the chipper disk 17 and fixed to the chipper disk 17. The knife 20 is attached with a slight inclination in the direction in which the cutting edge 201 moves away from the front opening 30. As a result, the tree is efficiently cut into a predetermined size.

In the illustrated example, two knives 20 are installed in one opening 29, but the number and arrangement of the knives 20 are not limited to this. Also, the pattern of forming the openings 29 on the chipper disk 17 is not limited to that shown in the figure, and for example, three openings may be formed at 120 ° intervals or four openings may be formed at 90 ° intervals. It can also be done.

In addition, guide members 21 and 21 are provided near the openings 29 and 29 on the rear surface side of the chipper disk 17, respectively. The guide member 21 is a member having a substantially L-shaped cross section, and has a long portion 21a and a short portion 21b that are orthogonal to each other via a bent portion 21c.

The guide member 21 is arranged in parallel with the chipper disc 17 so that the long portion 21 a covers the rear opening 31 of the opening 29, and the short portion 21 b is substantially perpendicular to the rear surface of the chipper housing 17. The short portion 21b and the rib 34 extending from the vicinity of the bent portion 21c are in contact with each other and fixed to the rear surface of the chipper disk 17. The substantially L-shaped guide member 21 forms an opening toward the cutting edge 201 of the knife 20, that is, toward the front in the rotational direction of the chipper disk 17.

The rib 34 has a function of reinforcing the fixing strength of the guide member 21 to the chipper disk 17.

The method of fixing the guide member 21 to the chipper disk 17 is not particularly limited, and for example, welding, brazing, adhesive bonding, bolting or the like can be performed.

The drive mechanism 22 is wound around a chipper pulley 27 attached to a shaft 23, an engine pulley 25 attached to an output shaft 26 of an engine (not shown), and both pulleys 25, 27. An endless belt 28 is provided, and the output shaft 26 is rotated by the driving of the engine, and the rotational force is sequentially transmitted to the engine pulley 25, the endless belt 28, the chipper pulley 27, and the shaft 23, and the chipper is provided. The disk 17 rotates counterclockwise in FIG.

As shown in FIG. 3, the discharge part 6 mainly includes a fixed hood 35, a hood 36, and a discharge pipe 37 forming a chip discharge port 371.

The fixed hood 35 and the hood 36 adjacent to the fixed hood 35 form a housing, and these are attached to the upper part of the chipper housing 18 of the cutting part 5 and the upper half of the chipper disk 17 is attached. Surround. That is, the entire tipper disk 17 is housed by the tipper housing 18, the fixed hood 35, and the hood 36.

The fixed hood 35 is fixed to the chipper housing 18 by bolting or the like, and the hood 36 is rotatably attached to the fixed hood 35 by a hood pin 38.

Further, the discharge pipe 37 is rotatably attached to the upper portion of the fixed hood 35 via a swivel swivel 42 as shown by an arrow R in FIG. The fixed hood 35 and the discharge pipe 37 communicate with each other.

As shown in FIG. 3, the discharge pipe 37 is formed of a cylindrical body whose rear end side is curved and whose front end side is substantially horizontal to the ground or which is extended so that the discharge port 371 side is directed slightly upward. There is. With the discharge tube 37 having such a shape, the chip can be discharged to a long distance in a predetermined direction.

A tree cutting device 1 is configured by the above-described intake unit 3, transport unit 4, cutting unit 5, discharge unit 6, and main frame 2 on which these units are mounted. The tree cutting device 1 is supported and fixed by a pair of wheels 39 provided at a lower portion of the main frame 2 and a jack stand 43 provided at a front end portion of the main frame 2, and a tree cutting operation is performed. Further, the tree cutting device 1 is connected to a tractor or the like (not shown) by a connector 40 provided at the front end portion of the main frame 2 and pulled and moved.

Next, the operation of the tree cutting device 1 will be described. The tree cutting device 1 is connected to a tractor via a coupler 40, towed, and transferred to a predetermined work site such as a forest. At the work site, it is jacked up by the jack stand 43 and placed.

When a tree is put into the intake unit 3, the put tree is sandwiched between the lower feed wheel 9 and the upper feed wheel 10 which are rotated by the operation of the hydraulic motors 11 and 12 of the transport unit 4. Then, it is conveyed to the front and sent to the introduction port 19 of the cutting unit 5.

The chipper disk 17 of the cutting unit 5 is rotated at a high speed (for example, about 1200 to 1500 rpm) via the drive mechanism 22 by the drive of the engine. When a tree fed from the introduction port 19 comes into contact with the high-speed rotating chipper disk 17, the tree is cut into chips by a knife 20 provided on the chipper disk 17. This tip passes through the opening 29 near the knife 20 and moves to the front side of the chipper disk 17, and is immediately guided by the guide member 21, that is, the pressing force and centrifugal force by the guide member 21. Is directly supplied to the inside of the fixed hood 35, further passes through the discharge pipe 37, and is discharged to the outside from the discharge port 371. At this time, the ejection speed of the chip from the ejection port 371 reaches preferably 3000 m / min or more, more preferably 3500 m / min or more. The chips discharged from the discharge port 371 are scattered and accumulated on the ground.

The chipper disk 17 rotates at a high speed, but the guide member 21 also rotates integrally with the chipper disk 17. Therefore, the chip cut by the knife 20 is guided by the guide member 21 immediately after that, and the chip is cut at a high speed. Is sent to the discharging section 6 and discharged while maintaining the discharging speed of.

Therefore, the process from cutting the tree to discharging the chips is performed in a series of operations. During this period, the loss of dynamic power (energy) is small, and the required high discharge speed is maintained with less power. can do.

Moreover, since the chip dragging phenomenon and the generation of fine powder associated therewith do not occur unlike the conventional case, the fine powder may be clogged or adhered to each part of the device, resulting in a malfunction of each part of the device. Problems that occur or require time and effort to remove them are eliminated.

The tree cutting device of the present invention has been described above based on the embodiment shown in the accompanying drawings. However, the present invention is not limited to this, and the configuration of each part constituting the tree cutting device is the same. Can replace any that can produce the function of.

[0057]

[Effect of the invention]

 As described above, according to the present invention, the cut chips (wood chips) are directly sent to the discharging portion immediately after the cutting, so that the chips can be discharged with less power. Therefore, it is possible to increase the chip ejection distance with the same power as the conventional one.

Further, unlike the conventional apparatus, since the fine powder is not generated due to the drag phenomenon of the chip, there is no adverse effect such as the fine powder adhering to each part of the apparatus to cause a trouble.

Further, when a plurality of openings of the rotary disk are provided and a knife and a guide member are provided for each of the openings, the cutting efficiency of trees can be further improved.

Further, when the guide member has a shape that covers the opening and forms an opening toward the front in the rotation direction of the rotating disk, particularly when it is configured by a substantially L-shaped member, With a simple structure, the chip can be sent to the emitting section with higher efficiency, and the above-mentioned effect becomes more remarkable.

Further, in the case where the transport section has a pair of wheels for sandwiching the tree and a drive means for driving the wheels to rotate in opposite directions, the tree is efficiently and stably cut. Can be transported to the department.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing an embodiment of a tree cutting device of the present invention.

FIG. 2 is an exploded perspective view of an intake section and a transport section of the tree cutting device.

FIG. 3 is an exploded perspective view of a cutting unit and a discharging unit of the tree cutting device.

FIG. 4 is a perspective view of a chipper disc.

FIG. 5 is a sectional view of a main part of a chipper disk.

[Explanation of symbols]

 1 Tree Cutting Device 2 Main Frame 3 Intake Section 4 Conveying Section 5 Cutting Section 6 Ejection Section 7 Inlet 8 Fixed Wheel Box 9 Lower Feed Wheel 9a Convex Strip 10 Upper Feed Wheel 10a Convex Strip 11, 12 Hydraulic Motor 13 Slit 14 Bearing 15 Upper slide box 16 Bearing 17 Chipper disk 18 Chipper housing 19 Inlet port 20 Knife 21 Guide member 21a Long part 21b Short part 21c Bending part 22 Drive mechanism 23 Shaft 24 Mounting part 25 Engine pulley 26 Output shaft 27 Chipper pulley 28 Belt 29 Opening Part 29a Tapered surface 30 Front opening 31 Rear opening 32 Bolt 33 Nut 34 Rib 35 Fixed hood 36 Hood 37 Discharge pipe 371 Discharge port 38 Hood pin 39 Wheel 40 Connector 41 Bearing 42 Swivel swivel 43 Jager Kickstand

Claims (10)

[Utility model registration claims] 1. A tree cutting device comprising an intake section for cutting a tree to be cut, a transport section, a cutting section, and a discharging section for discharging the cut piece of wood, wherein the cutting section cuts off the piece of wood after cutting the tree. A tree cutting device, characterized in that the tree cutting device is configured to be directly sent to the discharging part. 2. A tree cutting device comprising: an intake section for cutting a tree to be cut, a transport section, a cutting section, and a discharging section for discharging the cut wood pieces, wherein the cutting section is a knife for cutting the tree. A tree cutting device having a rotating disk provided with a guide member for guiding the wood piece immediately after cutting to the discharge part. 3. The rotating disk has at least one opening, and the knife and the guide member are installed on different surface sides of the rotating disk and in the vicinity of the opening. The tree cutting device according to 2. 4. The rotating disk has a plurality of openings,
The tree cutting device according to claim 2, wherein the knife and the guide member are provided for each opening. 5. The tree cutting device according to claim 4, wherein the opening is provided at a symmetrical position with respect to the rotation axis of the rotating disk. 6. The tree cutting device according to claim 3, wherein an opening area of the opening is different between one surface and the other surface of the rotating disk. 7. The guide member has a portion that covers the opening, and has a shape that forms an opening toward the front in the rotation direction of the rotating disk. The tree cutting device described in Crab. 8. The guide member according to claim 2, wherein the guide member is a substantially L-shaped member having a long portion substantially parallel to the rotary disk and a short portion bent with respect to the long portion. The tree cutting device according to any one of the above. 9. The cutting unit includes a housing that houses at least a part of the rotary disk and has an arcuate portion along the outer circumference of the rotary disk.
The tree cutting device according to any one of 1. 10. The tree cutting device according to claim 1, wherein the transport section includes a pair of wheels that sandwich a tree, and a drive unit that rotationally drives the wheels in mutually opposite directions.