KR20010026592A - Wood chipper - Google Patents

Abstract

PURPOSE: Provided is a wood grinder having a conveying device that crushes wood into chip shaped processed materials, which can treat waste wood or miscellaneous small trees promptly and effectively. CONSTITUTION: The apparatus comprises an engine(1) generating power, a grinding tank (2) having a ventilating disc(2a) rotated by operating force of the engine for crushing wood into a chip size and ventilating the crushed materials inside, a supply hopper(3) guiding wood materials into the grinding tank, a guide duct(4) guiding the crushed and ventilated materials to a fixed location and a discharge hopper(5) having a plurality of discharge ports(5a) for collecting the crushed materials removed along the guide duct and filling in a storage bag that is placed at the top part of a resting frame(7). A conveying device(10) is installed at the lower part of the resting frame to be self-moved by removal of endless shaped conveyor wheels by operation of the engine.

Description

Wood Shredders {WOOD CHIPPER}

The present invention relates to a wood shredder, more specifically in the production of chip-size shredded for use in pulp or various industrial raw materials and agricultural raw materials or land packaging, immediately after moving to the logging site where the wood or waste wood is located The present invention relates to a wood shredder configured to be easy to crush logs of wood or waste wood in a bag and load directly into a truck.

In general, most of the lumber that occurs when cutting the desired shape of the sawmill in the sawmill, or other trees generated when pruning trees of roadside orchards or forests, are broken into chips, and the mats or compost of animal farm orchard farmland, etc. The situation is recycled into the same agricultural raw materials or industrial raw materials such as pulp or fuel.

When the waste wood or crushed wood is crushed as described above and processed into recyclable waste such as agricultural or industrial raw materials, the wood or waste wood is shredded only by a huge facility installed on a production process line such as a paper mill. The crush production of Therefore, the cumbersome loading and unloading and storage that has to carry the wood from the logging site to the factory as it was, there was a problem that can not be easily purchased and used because the production of wood chips is low and the price is high.

On the other hand, as a way to solve the above problems in the prior art as shown in Figure 6 is rotated by the driving force of the engine on the top of the trailer (6) with the wheel (6a) to crush the wood and at the same time By the crushing cylinder (2) with the crushing and blowing disk (2a) to be blown, the workpiece supply hopper (3) for guiding the wood into the crushing cylinder (2), and the crushing and blowing disk (2a) A wood shredder equipped with a shredding guide duct 4 for guiding the blown shredded material to a predetermined position, and a shredding discharge hopper for collecting the shredded air blown along the shredding guide duct 4 and storing it in a storage bag .

However, such a conventional wood shredder is easy to process the wood into chip-like shreds in the lumbering area, but when moving the location is inevitably towed and moved to other equipment, such as trucks or heavy equipment, installation and movement This hassle, of course, there was a problem that the crushing work of the wood or waste wood is prolonged.

The present invention has been proposed in view of the problems described above, and its purpose is to move to a logging site where logs or wastes are located, and then immediately crush the logs or wastes of the logging area into chips-sized shreds and then package it. It is an object of the present invention to provide a wood shredder configured to be easily placed in a bag and loaded directly into a truck.

According to a feature of the invention, the engine generating power, and the crushing barrel is built by the crushing and blow disks that are rotated by the driving force of the engine to crush the wood to chip size and blow the crushed material, and the wood into the crushing cylinder A plurality of workpiece supply hoppers for guiding the entry, crushing guide ducts for guiding the crushed matters blown by the crushing and blowing disks to a predetermined position, and a plurality of crushed pieces blown along the crushing guides duct to be stored in a storage bag. In a wood shredder having a shredding discharge hopper having a shredding discharge port is mounted on the upper end of the base frame to crush the wood to be stored in the storage bag, so that the endless conveyor wheel is moved by the driving force of the engine The moving means formed is installed on the lower portion of the base frame The timber is provided a crusher as claimed.

1 is a perspective view showing a wood crusher according to an embodiment of the present invention.

Figure 2 is an exploded perspective view showing a moving means of the main part of the present invention wood shredder.

Figure 3a and Figure 3b is a side view and a rear view showing a coupling structure of the transmission and the transmission of the transmission means which is the main part of the present invention wood shredder.

Figure 4 is an exploded perspective view showing a driving force control means which is a main part of the present invention wood shredder.

Figure 5 is an exploded perspective view showing a control box of the moving means which is the main part of the present invention wood shredder.

6 is a perspective view showing a conventional wood crusher.

<Description of the code | symbol about the principal part of drawing>

1: engine 2: shredder

2a: Blowing disk 3: Workpiece supply hopper

4: Shredding material duct 5: Shredding material discharge hopper

5a: Shredding outlet 7: expected frame

10: moving means 100: conveyor wheel

110: belt portion 120: ground contact projection

130: locking groove 140: guide projection

200: guide support frame 210: plate portion

220: guide roller 230: driven wheel

231: locking gear 240: length adjusting means

241 support bar 242 guide bar

242a: guide ball 243: length adjustment shaft

243a: thread 244: length adjustment bracket

244a: Guide hole 245: Fixing nut

300: subframe 400: drive shaft

410: driving wheel 411: locking gear

500: Mission 600: Reducer

700: control box 710: mounting bracket

711: mounting plate 712: locking latch

712a: engaging jaw 713: support rib

713a: through hole 720: slewing rock

721: shaft 722: brake engagement

722a: engaging jaw 722b: fastening hole

723: direction control jam 723a: locking jaw

724: Fastening Bolt 725: Spring

730: brake lever 731: vertical rotating plate

731a: recessed groove 731b: fastener

732: handle portion 740: direction control lever

741: rotating plate 741a: coupling hole

742: rotary rib 742a: through hole

743: connecting bar 744: handle

800: driving force control means 810: driving ring

811: gear groove 820: drive shaft

830: hub plate 831: boss section

831a: gear 840: drive plate

841: through hole 842: gear part

850: clutch plate 851: gear ball

852: sliding sleeve 853: link

860: intermittent lever 861: fork

870: Spring

Hereinafter, described in detail with reference to the accompanying drawings, the present invention wood shredder as follows.

1 is a perspective view showing a wood crusher according to an embodiment of the present invention. As shown, the wood shredder according to the embodiment of the present invention is rotated by the engine 1 for generating power and the driving force of the engine 1 to shred the wood into chip size and at the same time blow the shreds and A crushing cylinder (2) having a blowing disk (2a), a workpiece supply hopper (3) for guiding wood to enter the crushing cylinder (2), and a crushed product blown by the crushing and blowing disk (2a) Crushed matter discharge hopper (5) having a crushed material guide duct (4) for guiding to a predetermined position, and a plurality of crushed material discharge port (5a) to collect the crushed material blown along the crushed material guide duct 4 to be stored in the storage bag In the wood crusher mounted on the upper end of the base frame 7 to crush the wood to be stored in the storage bag, it is possible to move itself as the endless conveyor wheel 100 is transferred by the driving force of the engine 1. To The moving means 10 made up is configured to be installed under the base frame 7.

In addition, in some cases, the driving force control means 800 for controlling the driving force of the engine 1 transmitted to the crushing of the crushing cylinder 2 and to the blowing disk 2a is included.

As shown in FIGS. 2 and 3A and 3B, the moving means 10 has a plurality of ground contact protrusions 120 contacting the ground on the outer surface of the belt part 110 having a predetermined width. Protruding at appropriate intervals along the plurality of ground contact projections 120 between the engaging groove 130 is formed in the longitudinal direction along the width center line of the belt portion 110 and each of the engaging groove 130 On the inner surface of the adjacent belt portion 110, a plurality of guide wheels 140 forming a set of a plurality of conveyor wheels 100 formed along the longitudinal direction of the belt portion 110 to maintain an appropriate interval, plate portion A plurality of guide rollers 220 to be rotatably coupled to guide the guide protrusion 140 of the conveyor wheel 100 is inserted into the lower and upper sides of both sides of the 210 and the upper surface of one end of the plate portion 210 In the hanging groove 130 of the conveyor wheel 100 A plurality of guide supports are rotatably supported by the support bar 241 of the length adjusting means 240, the driven wheel 230 having a plurality of locking gears 231 to be inserted into the front and rear direction adjustable The conveyor wheel 100 is driven by the frame 200, the subframe 300 supporting and fixing the plurality of guide support frames 200 to the bottom of the base frame 7, and the driving force of the engine 1. A plurality of drive shafts 400 and a plurality of drive shafts 400 coupled to drive wheels 410 having a plurality of locking gears 411 that are inserted into and engaged in the locking grooves 130 of the conveyor wheel 100 at an end thereof. 400 is rotatably coupled to both sides, the driving force of the engine 500 and the transmission force to the transmission 500 and the mission 500 to selectively transmit the driving force of the engine 1 to the plurality of drive shafts 400 To reduce or increase the speed reducer 600 and the drive of the mission 500 Air and consists of a control box 700 is provided with a plurality of the lever for adjusting the moving direction and stop, etc. of the timber crusher.

The driving force transmission of the engine 1 and the reducer 600 is a pulley 611, 612 is coupled to the power transmission shaft 1a of the engine 1 and the input shaft 610 of the reducer 600, respectively, the pulley 611 and 612 are coupled to each other by the pulley belt 613 is configured to rotate the input shaft 610 of the reducer 600 in accordance with the rotation of the power transmission shaft (1a) of the engine (1). do.

Pulleys (621, 511) are coupled to the output shaft 620 of the reducer 600 and the input shaft 510 of the mission 500, respectively, and the pulley (transmission) of the driving force of the reducer (600) and the mission (500). 621 and 511 are coupled to each other by the pulley belt 512 is configured to rotate the input shaft 510 of the mission 500 in accordance with the rotation of the output shaft 620 of the reducer 600.

Length adjusting means 240 for adjusting the position of the driven wheel 230 coupled to the plate portion 210 of the guide support frame 200 is rotatable the driven wheel 230 as shown in FIG. A guide bar 242a formed to support the support bar 241 and the support bar 241 is inserted into the guide bar 241 and slides and is fixedly coupled to the upper end of the plate part 210. The length adjustment shaft 243 is fixedly coupled to the upper end of the plate portion 210 adjacent to the guide bar 242 and has a predetermined length at one end thereof, and passes through the guide bar 242. An end of one support bar 241 is fixedly coupled to a length adjusting bracket 244 and a length adjusting bracket 244 formed with a guide hole 244a into which the screw portion 243a of the length adjusting shaft 243 is inserted. It consists of a fixing nut 245 for fixing the length adjustment bracket 244 coupled, the length According to the position of the length adjustment bracket 244 coupled to the adjustment shaft 243 between the driven wheel 230 and the plate portion 210 of the guide support frame 200 rotatably coupled to the support bar 241 By adjusting the distance, the tension of the conveyor wheel 100 coupled to the guide support frame 200 is adjusted.

As shown in FIG. 5, the control box 700 has an upper surface of one side of an installation plate 711 fixedly coupled to the rear end of the base frame 7 adjacent to the mission 500 and the reducer 600. Locking engaging piece 712 having a locking jaw (712a) is fixedly coupled to the lower side of the mounting plate 711 is installed in which a plurality of support ribs 713 having a through hole 713a is fixedly coupled in a straight line The brake engaging piece 722 having a cross section b-shaped having a locking jaw 722a is fixed between the bracket 710 and the shaft 721 rotatably inserted into the support rib 713 of the installation bracket 710. A directional control engaging piece 723 is securely coupled to the cross-section b-shape having a locking jaw 723a at both ends of the shaft 721, and a fastening bolt 724 is inserted into an upper portion of the brake engaging piece 722. The pivoting arm 720 having a fastening hole 722b formed therein, and a brake engaging piece 722 of the pivoting arm 720. The fastening on the upper side of the vertical rotating plate 731 having a lower opening recessed groove 731a in which the shaft 721 of the pivoting arm 720 is inserted into the lower end surface so as to be rotatably coupled to the shaft 721 to be contacted. A fastening hole 731b into which a bolt 724 is inserted is formed, and a brake lever 730 having a hand grip 732 vertically fixedly coupled to an upper surface of the vertical pivot plate 731, and the pivot arm. The mission on the upper side of the rotating plate 741 is provided with a rotary rib 742 having a through hole 742a rotatably inserted into an end portion of the shaft 721 adjacent to the direction control locking piece 723 of 720. A coupling hole 741a is formed to couple the connection bar 743 connected to the 500 and a plurality of handle portions 744 fixed by hand are vertically fixed to the rotary rib 742 of the pivoting plate 741. It consists of two direction control levers (740).

In addition, both ends of the fastening bolt 724 inserted into the fastening hole 722b of the pivotal arm 720 and the fastening hole 731b of the brake lever 730 are respectively heads 724a of the fastening bolt 724. A spring 725 supported by the brake engaging piece 722 of the pivoting arm 720 is fitted, and a nut 724b is attached to the screw portion 243a of the fastening bolt 724 passing through the corresponding fastening holes 722b and 731b. ) Is fastened so that the vertical pivoting plate 731 of the brake lever 730 is elastically locked to the locking engagement piece 712 of the installation bracket 710, and the front and rear direction of the movement means 10 is The front and rear lever 750 for controlling and the multi-stage gear lever 760 for controlling the driving speed of the moving means 10 are installed in the mission 500.

As shown in FIG. 4, the driving force control means 800 is coupled to interlock with the driving shaft 400 of the engine 1, and has a driving ring 810 having a plurality of gear grooves 811 formed therein, and the crushing thereof. A drive shaft 820 having one end fixedly coupled to the crushing and blowing disk 2a rotatably installed inside the cylinder 2, and a plurality of gear portions 831a fixedly coupled to the other end of the drive shaft 820; A circular hub plate 830 formed successively with a boss portion 831 and a boss portion 831 of the hub plate 830 inserted into the center of the drive shaft 820. A drive plate 840 having a plurality of through holes 841 formed therein and a plurality of gears 842 meshing with the gear grooves 811 of the drive ring 810 at an outer circumference thereof, and being transferred on the drive shaft 820. It is possible to fit the boss portion 831 of the hub plate 830 in the central portion is engaged. A gear hole 851 is formed, and a clutch plate 850 having a sliding sleeve 852 coupled to one surface by a plurality of links 853 and a sliding sleeve 852 of the clutch plate 850 are pushed to the clutch. The plate 850 includes an intermittent lever 860 having a fork 861 which is in close contact with or spaced from the hub plate 830 while pushing the drive plate 840. The intermittent lever 860 is rotated by rotating the intermittent lever 860. When the fork 861 pushes the sliding sleeve 852, the clutch plate 850 slides along the drive shaft 820 and moves in the direction of the hub plate 830 to engage the drive ring 810 of the engine 1. And the drive plate 840 interlocked with the hub plate 830, and the gear hole 851 of the clutch plate 850 is engaged with the gear part 831a of the hub plate 830 to engage the engine 1. The driving force of the drive ring 810 By mutual adhesion of the bracket plate 840 and hub plate 830 and the clutch plate 850 is transmitted to the drive shaft 820. The

In addition, when the spring 870 is embedded between the hub plate 830 and the clutch plate 850 and the rotated intermittent lever 860 is replaced, the drive plate 840 is moved by the elastic force of the spring 870. A close contact between the hub plate 830 and the clutch plate 850 is in close contact with the drive plate 840 and the hub plate 830 and the clutch plate 850 coupled to the drive ring 810 The driving force of the engine transmitted to 820 is cut off.

The action of the wood shredder of the present invention configured as described above is as follows.

When moving the wood shredder to the place where the felled wood is located, first, the intermittent lever 860 of the driving force control means 800 is rotated to be in close contact with and interlocked with the drive plate 840 and the hub plate 830 and the clutch. By separating the plates 850, the driving force of the engine 1 transmitted to the driving shaft 820 is cut off so that the shredding of the shredding cylinder 2 and the blowing disk 2a do not rotate.

After the engine 1 is started and driven, the power of the engine 1 is transmitted to the input shaft 610 of the reducer 600, and the driving force thereof is properly adjusted and then output through the output shaft 620. The driving force of the output shaft 620 of the 600 is transmitted to the input shaft 510 of the mission 500 and then transmitted to the driving shaft 400 of the mission 500, and the driving force output to the driving shaft 400 of the mission 500. Is to rotate the conveyor wheel 100 coupled in an endless shape to the guide support frame 200 to be able to move the wood shredder to a desired position.

At this time, the length adjusting means 240 installed on the top of the guide support frame 200 to arbitrarily adjust the distance between the drive wheel 410 and the driven wheel 230 to slide along the guide support frame 200 The tension of the conveyor wheel 100 is adjusted, and the guide roller 220 of the guide support frame 200 guides the conveyor wheel 100 to slide smoothly.

In addition, the direction change of the wood shredder to be moved is rotated by the driving force of the mission 500 connected by the direction control lever 740 and the connection bar 743 by moving the direction control lever 740 of the control box 700 By selectively stopping the rotation of either drive shaft 400 of both drive shafts 400 so that the wood chipper is switched to the left or right direction.

In addition, by pulling the brake lever 730 installed in the control box 700 to be caught by the locking engaging piece 712 of the mounting bracket 710, the pivoting arm 720 by the pivoting brake lever 730 The turning lever is rotated, and at the same time, the direction control lever 740 rotatably coupled to both ends of the shaft 721 of the pivoting arm 720 is pushed by the turning direction of the pivoting arm 720 to be rotated. Both drive shafts 400 which are rotated by the driving force of the mission 500 connected by the connection bar 743 are stopped to stop the movement of the wood chipper.

Subsequently, after the wood chipper is moved to the place where the felled logs are located, the drive plate interlocked with the driving ring 810 of the engine 1 by rotating the intermittent lever 860 of the driving force control means 800 ( By bringing the 840 into close contact between the hub plate 830 and the clutch plate 850, the driving force of the engine 1 is transmitted to the crushing and blowing disk 2a through the driving shaft 820, and thus the crushing and blowing disk 2a. ) To rotate.

Then, when the waste wood or lumber is put into the crushing container (2) through the workpiece supply hopper (3) of the wood crusher, the rotating crushing and blowing disk (2a) to crush the waste wood and lumber in chip size and blow at the same time To be discharged to the outside through the shredding guide duct (4) or moved to the shredding discharge hopper (5) to facilitate the storage bag.

As described above, the wood shredder of the present invention is equipped with a moving means configured to be driven by the endless-shaped conveyor wheel by the driving force of the engine and is capable of self-moving to a logging site in which waste wood or lumber is located by a transfer means. It can be easily transported and installed to crush waste wood or lumber, and it can be done more quickly.In particular, the crushed trees generated by pruning the trees on both sides along the road are immediately crushed while the wood crusher moves and processed into chip-like shreds. Since it can be loaded into a vehicle in a storage bag, there is an effect of processing waste wood or lumber more efficiently and quickly.

Claims (6)

An engine 1 for generating power, and a crushing cylinder 2 having a crushing and blowing disk 2a which is rotated by the driving force of the engine 1 and crushes wood to chip size and blows crushed materials; And, the workpiece supply hopper (3) for guiding the wood to enter the crusher (2), the crushed material guide duct (4) for guiding the crushed material blown by the crushed and blown disk (2a) to a predetermined position, and Crushed matter discharge hopper (5) having a plurality of crushed material outlet (5a) is mounted on the upper end of the anticipated frame (7) to collect the crushed material blown along the crushed material guide duct (4) to be stored in the storage bag In a wood chipper that can be stored in a storage bag, As the conveyor wheel 100 of the endless shape is transferred by the driving force of the engine 1, a moving means 10 configured to be movable by itself is installed in the lower part of the base frame 7. . The wood chipper as claimed in claim 1, characterized in that it comprises a driving force control means (800) for intercepting the driving force of the engine (1) delivered to the shredding of the shredding bin (2) and to the blowing disk (2a). According to claim 1, The moving means 10 is formed on the outer surface of the belt portion 110 of the endless shape having a predetermined width a plurality of ground contact projections 120 in contact with the ground is formed to protrude at an appropriate interval along the longitudinal direction A plurality of locking grooves 130 are formed in the longitudinal direction along the width center line of the belt portion 110 between the plurality of ground contact protrusions 120, and the belt portions adjacent to the respective locking grooves 130 ( A plurality of conveyor wheels 100 formed on the inner side of the guide protrusion 140 in the longitudinal direction of the belt part 110; A plurality of guide rollers 220 are rotatably coupled to guide the guide protrusion 140 of the conveyor wheel 100 is inserted into the lower and upper sides of the plate portion 210, the plate portion 210 of the One end of the driven wheel 230 having a plurality of locking gears 231 is inserted into the locking groove 130 of the conveyor wheel 100 is rotatable by the support bar 241 of the length adjusting means 240 And a plurality of guide support frame 200 is coupled to support; A subframe (300) for supporting and fixing the plurality of guide support frames (200) to the bottom of the base frame (7); A driving wheel 410 having a plurality of locking gears 411 that are inserted into the locking groove 130 of the conveyor wheel 100 at an end portion so as to drive the conveyor wheel 100 by the driving force of the engine 1. A plurality of drive shafts 400 coupled thereto; A mission (500) to which the plurality of drive shafts (400) are rotatably coupled to both sides and to selectively transmit the driving force of the engine (1) to the plurality of drive shafts (400); A reducer (600) for increasing or decreasing a driving force of the engine (1) transmitted to the mission (500); Wood shredder characterized in that it comprises a control box 700 is provided with a plurality of levers for controlling the drive of the mission (500). According to claim 2, The driving force control means 800 is coupled to the drive shaft 400 of the engine (1), the driving ring 810 is formed with a plurality of gear grooves 811 on the inner surface; A drive shaft 820 having one end fixedly coupled to the crushing and blowing disk 2a rotatably installed in the crushing cylinder 2; A circular hub plate 830 fixedly coupled to the other end of the driving shaft 820 and having a boss portion 831 successively having a plurality of gear portions 831a on one surface thereof; A through hole 841 is inserted into the drive shaft 820 so as to be transported, and a boss portion 831 of the hub plate 830 is inserted into a center portion thereof, and a gear of the drive ring 810 is formed at an outer circumference thereof. A drive plate 840 having a plurality of gears 842 engaged with the grooves 811; A gear hole 851 is inserted into the drive shaft 820 so as to be transported, and the boss hole 831 of the hub plate 830 is engaged with the center shaft, and a plurality of sliding sleeves 852 are provided on one surface thereof. A clutch plate 850 coupled by a link 853 of the; A spring 870 embedded between the hub plate 830 and the clutch plate 850; An intermittent lever 860 having a fork 861 that pushes the sliding sleeve 852 of the clutch plate 850 to closely contact or space the hub plate 830 while pushing the drive plate 840. ) Is a wooden shredder comprising a. According to claim 3, wherein the length adjusting means 240 and the support bar 241 is rotatably supported by the driven wheel 230; A guide hole 242a is formed to slide the support bar 241 into the guide bar, and a guide bar 242 fixedly coupled to an upper end of the plate part 210; A length adjusting shaft 243 fixedly coupled to an upper end of the plate portion 210 adjacent to the guide bar 242 and having a screw portion 243a having a predetermined length at one end thereof; An end of the support bar 241 passing through the guide bar 242 is fixedly coupled, the length adjustment bracket 244 is formed with a guide hole 244a is inserted into the screw portion 243a of the length adjustment shaft 243 and ; Wood shredder characterized in that it comprises a fixing nut (245) for fixing the length adjustment bracket 244 coupled to the length adjustment shaft (243). According to claim 3, The control box 700 is caught in the upper portion of the upper surface of the mounting plate 711 fixedly coupled to the rear end of the base frame 7 adjacent to the mission 500 and the reducer 600 Locking engaging piece 712 having a jaw (712a) is fixedly coupled, the lower portion of the mounting plate 711 a plurality of support ribs 713 having a through hole 713a is fixedly coupled to the corresponding straight line 710; A brake engaging piece 722 having a cross-section B shape having a locking jaw 722a in the middle of the shaft 721 rotatably inserted into the support rib 713 of the installation bracket 710 is fixedly coupled to the shaft ( 721 has a cross-section b-shaped direction control locking piece 723 having locking jaws 723a on both ends thereof, and a fastening bolt 724 having a spring 725 supported on the brake locking piece 722. Pivot arm 720 having a fastening hole 722b into which is inserted; The fastening on the upper side of the vertical rotating plate 731 is formed with a recessed groove 731a having a lower opening on the lower surface to be rotatably coupled to the shaft 721 adjacent to the brake engaging piece 722 of the rotating arm 720. A fastening hole 731b into which a bolt 724 is inserted is formed, and a brake lever 730 having a hand grip 732 fixedly coupled to an upper surface of the vertical pivoting plate 731; The rotary plate 741 is provided with a rotary rib 742 having a through hole 742a rotatably inserted into an end portion of the shaft 721 adjacent to the direction control locking piece 723 of the pivot arm 720. A coupling hole 741a is formed to be coupled to the connection bar 743 connected to the mission 500 at an upper side thereof, and the rotary rib 742 has a plurality of direction control levers fixed by a handle part 744 held by hand. Wood crusher, characterized in that it comprises a (740).