WO1992021491A1 - Appareil servant a fendre le bois - Google Patents

Appareil servant a fendre le bois Download PDF

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Publication number
WO1992021491A1
WO1992021491A1 PCT/AU1992/000268 AU9200268W WO9221491A1 WO 1992021491 A1 WO1992021491 A1 WO 1992021491A1 AU 9200268 W AU9200268 W AU 9200268W WO 9221491 A1 WO9221491 A1 WO 9221491A1
Authority
WO
WIPO (PCT)
Prior art keywords
arm
bin
wood
frame
arch
Prior art date
Application number
PCT/AU1992/000268
Other languages
English (en)
Inventor
Nicolaas Laurisse Sieling
Original Assignee
Rotacon Engineering Limited
Schwab, Eric, Stanley
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rotacon Engineering Limited, Schwab, Eric, Stanley filed Critical Rotacon Engineering Limited
Publication of WO1992021491A1 publication Critical patent/WO1992021491A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L7/00—Arrangements for splitting wood

Definitions

  • This invention relates to apparatus for splitting wood.
  • splitting comprehends other ways of cutting blocks of wood into smaller pieces including chopping.
  • trees are felled and then "blocked", i.e. sawn into lengths of about 200-400 mm face to face.
  • the blocks are then split longitudinally into pieces of, very roughly. between 75 ⁇ 75 to 150 ⁇ 150 mm.
  • the localities where trees are felled are seldom accessible by truck.
  • the felled logs are therefore conventionally usually dragged to an accessible site before being blocked. This is costly.
  • dirt is rubbed into the logs and this bluntens the saw rapidly. It would be better if the logs were blocked and split at the site where they are felled but this is impractical using known apparatus and methods for these purposes.
  • the first is derived from a postrammer.
  • the second consists of an an:, which pivots at its centre, a cutting tool being mounted at one end of the arm and a hydraulic ram mounted at the other end. Extension of the hydraulic ram raises this end and lowers the end with the cutting tool.
  • a table is located under the tool. The tool comes down to split a block placed on the table.
  • apparatus for splitting wood comprising a splitting device, a table for supporting wood to be split by the splitting device, a bin for receiving wood which has been split, mounting means for mounting the apparatus on a vehicle provided with lifting means for lifting the apparatus, and means to unload the bin after it has been lifted by the lifting means to an unloading position.
  • the splitting device comprises an arm arranged to carry a blade for splitting the wood and a hydraulic ram arranged to apply reciprocating motion to the arm towards and away from the table
  • the cutting device comprises an arch disposed over the table, the hydraulic ram being suspended from the arch above the arm.
  • the apparatus is provided with means for guiding the motion of the arm towards and away from the table.
  • the means for guiding the motion of the arm includes a rail with which at least one end of the arm is siidably engaged.
  • the apparatus includes mounting means for pivotably mounting the opposite end of the arm on the apparatus.
  • the apparatus is advantageously mountable on the three point hitch of a tractor or on a similar lifting device with which the vehicle is equipped.
  • the apparatus could for example be mounted on the lifting arms of a front end loader.
  • the apparatus includes a frame, the bin being hinged to the frame and the means to unload the bin comprising tipping means for tipping the bin over.
  • the tipping means advantageously comprises a second hydraulic ram mountable between the frame and the bin.
  • the second hydraulic ram is connected to the hydraulic system of the tractor.
  • the table is pivoted to the apparatus and spring means is provided for urging the table to move to a working position, the table being arranged to pivot away from the working position against the force of the spring under pressure applied to the table by a block of wood being split, damping means being provided for damping return movement of the table to the working position.
  • the yielding of the table helps to ensure that the block of wood is securely seated on the table and does not bind the cutting blade as it penetrates the block.
  • the yielding of the table combined with damping of the return motion helps to prevent cut pieces of wood from shooting away from table when, as already mentioned, energy which built has up in a block of wood is suddenly released.
  • the ram for applying reciprocating motion to the arm is double acting and a hand operable valve is provided for actuating the ram.
  • Such valves are commonly provided with an operating handle which can be moved in one direction to extend the ram and in the opposite direction to retract the ram.
  • the handle has a neutral position in which the valve is closed so that no hydraulic fluid can pass into or out of the ram.
  • the ram is thus locked in position when the operating handle is in the neutral position.
  • the valve is preferably mountable on the end of the arm which is pivoted to the arch and the handle is connected by means of a light chain or the like to the arch adjacent the opposite end of the arm. The valve is orientated so that when an operator at the table pulls the chain the ram drives the arm towards the table.
  • Figure 1 is a somewhat schematic side view of a wood chopping or splitting apparatus
  • Figure 2 is a rear end view of the apparatus
  • FIG. 3 is a detail of part of the apparatus
  • Figure 4 is a view, similar to Figure 1, of a modified apparatus
  • Figure 5 is a view, similar to Figure 2, of the apparatus shown in Figure 4;
  • Figure 6 is a plan view of a part of the apparatus shown in Figures 4 and 5; and
  • Figure 7 is a detail of part of the apparatus shown in Figures 4 to 6. DETAILED DESCRIPTION OF THE EMBODIMENTS SHOWN IN THE DRAWINGS
  • wood splitting apparatus 10 comprises a rectangular frame 12 made up of heavy walled, 10 cm ⁇ 10 cm square steel tubing.
  • the frame 12 surrounds a bin 14 which is hinged to the rear cross member 16 of the frame.
  • the bin rests horizontally in the frame as shown in the drawings but the front end thereof can pivot upwardly on the cross member 16.
  • Legs 20 are mounted on the forward cross member of the frame and carry upper and lower lugs 21 for mounting the frame on the conventional three point hitch of a tractor.
  • An arch 22 is mounted on one side of the frame.
  • the arch comprises a front leg 24 and a rear leg 26 which are joined together at an apex 28.
  • Each leg comprises a pair of parallel, 50 mm x 50 mm rolled steel angle bars 30a, 30b positioned with a space 32 therebetween.
  • the arch is braced by downwardly angled struts 33 which are welded to the angle bars 30a, the frame 12 and to each other where they meet.
  • An arm 34 in the form of a heavy walled 75 mm diameter steel tube is located in the spaces 32.
  • the front end of the arm is pivoted to the arch by means of a pin 36 mounted in lugs welded to each bar 30a, 30b of the front leg.
  • the rear end of the arm is a close sliding fit in the space 32 between the bars of the rear leg 26 which thus acts as a rail for guiding the arm 34.
  • a first hydraulic ram 40 is suspended from a bracket 42 which joins the legs of the arch at the apex.
  • the lower end of the ram 40 is pivoted to the arm by means of a pin 44 mounted in lugs 46 welded to the arm close to its longitudinal centre.
  • the ram 40 is not shown in Figure 2.
  • a cutting tool 50 is mounted on the arr 34, aisc close to its longitudinal centre.
  • the cutting tool comprises a first blade 52 disposed parallel to the arm and projecting directly downwardly therefrom; and a second blade 54 disposed transversely to the first blade and projecting from the inner side thereof.
  • the arm and hence the cutting edge of the first blade 52 is angled at about 15° to the horizontal when the arm is at its lowest point.
  • the cutting edge of the transverse blade 54 is spaced upwardly from the cutting edge of the first blade as can best be seen in Figure 3.
  • a cutting table 56 is mounted on the frame below the cutting tool.
  • the table comprises a flat steel plate 58 welded to a stiffening flat bar 60.
  • the flat bar is hinged to the fore-and-aft member 62 of the frame 12 by means of pins 63 at the forward and aft ends of the bar 60 which are received in channels 61 welded to the fore-and-aft member 62.
  • a strong compression spring 64 is mounted between the member 62 and the lower face of the plate 58 near its outer edge.
  • a telescopic damper 66 is mounted inside the spring. (A spring and shock-absorber assembly from a motor cycle or light motor car may conveniently be used for the spring 64 and the damper 66).
  • the table 56 can thus pivot downwardly from the horizontal working position shown in the drawings if sufficient downward force is applied to the plate between the line of the hinge pins and the outer edge of the plate.
  • the arm 34 and the cutting tool 50 are positioned so that the cutting edge of the blade 52 moves in a plane which lies just inside the inner edge of the upper face of the cutting table 56.
  • a flat bar 67 is welded to the inner face of the member 62, angled downwardly at about 15o to the horizontal. This bar acts as a slide over which the split pieces of wood slide into the bin.
  • a short length of round bar 68 is welded to the side face of the member 62.
  • the round bar 68 is located just above the flat bar 67 and directly below the transverse cutting blade 54. It is also angled downwardly at about 15o to the horizontal and its highest point is flush with the upper face of the member 62. It acts as an anvil, to assist a wood block to be split by the transverse blade without binding the blade.
  • the geometry of the various components, as described, is chosen so that when the cutting tool 50 first engages a wood block of predetermined height, say 16 cm, the cutting edge of the first blade 52 is substantially parallel to the upper face of the cutting table. Both blades will thus bite into the wood block almost immediately so that the chances of the block slipping or flying off the table are minimal.
  • the ram 40 is connected to the hydraulic system of the tractor through a conventional control valve 70 having an operating handle 72.
  • the valve is mounted on the forward end of the arm 34 and so pivots with the arm.
  • a light link chain (indicated by the chain dotted line 74) is connected between the operating handle and a connecting point on the rear leg 22 of the arch. The chain thus hangs in an approximately horizontal position.
  • a return spring (not shown) is mounted between the operating handle and the forward leg 24 of the arch. This spring urges the operating handle to the ram retracting position.
  • the position of the chain is selected so that the weight of the chain by itself is just able to overcome the force of the return spring and hold the operating handle in the neutral position when the arm is in a preselected raised position.
  • the bin 14 is tipped by means of a second hydraulic ram 80 located on the side of the bin opposite the arch.
  • the ram 80 is mounted between the frame 12 and a trunnion 82 welded to the bin.
  • the bin is preferably raised and tipped from the drivers seat of the tractor.
  • a cross member 90 is welded to the angle bars 30b of the arch.
  • the member 90 is upwardly cranked as shown at 94 to accommodate the transverse cutting blade 54 when the arm 34 is raised. Occasionally a block of wood will become jammed on the cutting tool.
  • the member 90 is positioned to act as an abutment which pushes such a jammed block off the cutting tool when the arm is lifted higher than its normal raised position.
  • further sets of lugs 46 can be mounted on the arm 34 at varying distances from the pivot pin 36. If the ram is mounted on lugs which are closer to the pivot pin the speed of operation of the arm will increase although the force applied to the wood block will diminish. The opposite will happen if the ram is mounted on lugs which are further from the pivot pin.
  • the apparatus has a number of advantages over conventional wood splitting machines.
  • the provision of a transverse blade ensures that a block can usually be completely split in a single operation.
  • the blade operates vertically with the block resting on a horizontal table.
  • the table can pivot to allow the block to open as it is split.
  • the return motion of the table is damped.
  • the split pieces fall into a bin which in the present example is conveniently of one (cubic) metre capacity.
  • the tractor is driven to a tip-truck and the bin is lifted by operation of the three point hitch mechanism of the tractor and positioned over the body of the truck by mane Granng the tractor.
  • the ram 80 is then extended, causing the bin to pivot upwardly and rearwardly and tip its contents into the truck. Production rates can be substantially improved.
  • a dump counter can be mounted on the apparatus to record production.
  • the apparatus 10' comprises a frame 12' which is located on one side of a bin 14' and carries an arch 22' which is substantially similar to the arch 22.
  • the frame 12' is shown by itself in Figure 6.
  • the frame 12' is provided with a cross sub-frame 100 including downwardly depending legs 20' which carry lugs 21' for mounting the frame on the three point hitch of the tractor.
  • a hydraulic upper link in the three point hitch In order to allow the apparatus to be raised to a higher level when the bin is to be discharged it is desirable to use a hydraulic upper link in the three point hitch.
  • the upper lug 21' is shorter than the lower lugs.
  • a transversely disposed heavy walled steel pipe 102 is welded to the rear end of the frame 12'.
  • a steel pipe 104 is welded to the rear upper edge of the bin 14'.
  • the pipe 104 is of larger diameter than the pipe 102 and can slide thereover so that the bin 14' is pivotably supported on the pipe 102.
  • the ram 80' which tilts the bin 14' is located between the frame 12' and the bin 14' below the table 56.
  • One end of the ram is connected to a lug 106 which is welded to the pipe 104.
  • a lug 108 is welded to the cylinder of the ram 80' about halfway along its length. This lug is mounted on a pin 110 which is supported on the struts 33' of the arch 22'.
  • the bin In the apparatus 10' the bin can be lifted higher and tilted through a greater angle for unloading.
  • the ram 80' is less susceptible to damage and the bin is more accessible from the side opposite the arch.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Harvester Elements (AREA)

Abstract

Appareil servant à fendre le bois et comportant un bras (34) portant une lame (52) commandée par un bélier hydraulique (40) monté dans une voûte (22) formant une partie d'un cadre (12) que l'on peut monter sur le mécanisme de levage d'un véhicule tel qu'un tracteur ou un chargeur à benne frontale. Le bélier est suspendu à partir de la voûte et placé au-dessus du bras. Le bras est guidé par la voûte. Le cadre porte une table (56) destinée à porter le bois devant être fendu par l'appareil. Une trémie (14) destinée à recevoir le bois fendu est montée sur le cadre et sous la table. La trémie est montée pivotante sur le cadre et un bélier hydraulique (80) est prévu pour faire basculer ladite trémie et la vider de son contenu une fois qu'on l'a soulevée et placée au-dessus d'un camion. Le mécanisme de levage peut être l'attelage à trois points d'un tracteur ou les bras avant d'un chargeur à benne frontale. La table peut être montée pivotante sur le cadre et un ressort (64) peut servir à amener la table vers sa position active. Un amortisseur (66) peut être prévu pour amortir le mouvement de retour.
PCT/AU1992/000268 1991-06-07 1992-06-09 Appareil servant a fendre le bois WO1992021491A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ23845091 1991-06-07
NZ238450 1991-06-07

Publications (1)

Publication Number Publication Date
WO1992021491A1 true WO1992021491A1 (fr) 1992-12-10

Family

ID=19923610

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1992/000268 WO1992021491A1 (fr) 1991-06-07 1992-06-09 Appareil servant a fendre le bois

Country Status (2)

Country Link
AU (1) AU1971792A (fr)
WO (1) WO1992021491A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6609547B1 (en) 2002-10-24 2003-08-26 Ron P. Machkovech Log splitter attachment for a skid loader
ITAN20110046A1 (it) * 2011-04-07 2012-10-08 Mario Ceccarini Macchina per il taglio della legna da ardere.

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176696A (en) * 1976-07-19 1979-12-04 Bunyan's Woodcutter Corp. Fireplace wood cutting machine
US4219057A (en) * 1978-05-30 1980-08-26 Falk David C Timber to firewood processing machine
US4240476A (en) * 1978-12-14 1980-12-23 Rattray Clarence G Hydraulic log splitting attachment for a tractor
US4262714A (en) * 1979-06-18 1981-04-21 James L. Price Log splitting attachment for tractor three point hitch members
US4278118A (en) * 1978-06-09 1981-07-14 Larson Dennis L Log splitter for garden tractors
FR2477056A1 (fr) * 1980-02-28 1981-09-04 Tertrais Jean Baptiste Machine mobile pour le fendage, le sciage et le chargement de bois de chauffage
US4303112A (en) * 1980-01-21 1981-12-01 Sconce Leonard S Log splitter and split wood loader
US4437502A (en) * 1983-01-03 1984-03-20 Staver Paul L Trailer mounted log splitter
US4454899A (en) * 1983-04-14 1984-06-19 Myers Jr Charles D Firewood log splitting attachment for tractors

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176696A (en) * 1976-07-19 1979-12-04 Bunyan's Woodcutter Corp. Fireplace wood cutting machine
US4219057A (en) * 1978-05-30 1980-08-26 Falk David C Timber to firewood processing machine
US4278118A (en) * 1978-06-09 1981-07-14 Larson Dennis L Log splitter for garden tractors
US4240476A (en) * 1978-12-14 1980-12-23 Rattray Clarence G Hydraulic log splitting attachment for a tractor
US4262714A (en) * 1979-06-18 1981-04-21 James L. Price Log splitting attachment for tractor three point hitch members
US4303112A (en) * 1980-01-21 1981-12-01 Sconce Leonard S Log splitter and split wood loader
FR2477056A1 (fr) * 1980-02-28 1981-09-04 Tertrais Jean Baptiste Machine mobile pour le fendage, le sciage et le chargement de bois de chauffage
US4437502A (en) * 1983-01-03 1984-03-20 Staver Paul L Trailer mounted log splitter
US4454899A (en) * 1983-04-14 1984-06-19 Myers Jr Charles D Firewood log splitting attachment for tractors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6609547B1 (en) 2002-10-24 2003-08-26 Ron P. Machkovech Log splitter attachment for a skid loader
ITAN20110046A1 (it) * 2011-04-07 2012-10-08 Mario Ceccarini Macchina per il taglio della legna da ardere.

Also Published As

Publication number Publication date
AU1971792A (en) 1993-01-08

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