WO1983001921A1 - Scierie - Google Patents

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Publication number
WO1983001921A1
WO1983001921A1 PCT/AU1982/000198 AU8200198W WO8301921A1 WO 1983001921 A1 WO1983001921 A1 WO 1983001921A1 AU 8200198 W AU8200198 W AU 8200198W WO 8301921 A1 WO8301921 A1 WO 8301921A1
Authority
WO
WIPO (PCT)
Prior art keywords
carriage
timber
running beam
saw
main frame
Prior art date
Application number
PCT/AU1982/000198
Other languages
English (en)
Inventor
Roland Ross Kerfoot
Original Assignee
Roland Ross Kerfoot
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 Roland Ross Kerfoot filed Critical Roland Ross Kerfoot
Priority to AU91265/82A priority Critical patent/AU9126582A/en
Publication of WO1983001921A1 publication Critical patent/WO1983001921A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/16—Saw benches
    • B27B5/18—Saw benches with feedable circular saw blade, e.g. arranged on a carriage
    • B27B5/187—Saw benches with feedable circular saw blade, e.g. arranged on a carriage the saw blade being fitted on a movable carriage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/0041—Saw benches or saw bucks
    • B27B17/005—Saw benches or saw bucks with the saw mounted on a carriage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B31/00—Arrangements for conveying, loading, turning, adjusting, or discharging the log or timber, specially designed for saw mills or sawing machines

Definitions

  • This invention relates to a saw bench, and, in particular to a saw bench which may be operated on a logging site.
  • the charges to transport timber from a logging site to a sawmill may constitute a significant proportion of a logging operator's costs, and so any transport charges incurred for transporting unsuitable timber for processing markedly affects the profitability of the operation.
  • the timber may be rejected for processing for a number of reasons, and many of these reasons may not become apparent until processing of the timber is commenced at the sawmill.
  • the present invention resides in a saw bench including: a main frame; a running beam movably mounted above the main frame; means to support a length of timber to be cut in a work zone substantially below the running beam; a workhead movable along the running beam; and saw means mounted on the workhead and operable to cut the timber in the work zone.
  • the running beam is movable laterally and/or vertically relative to the main frame.
  • the means to support the timber include sleeper jacks and/or rotatable hobs mounted on the main frame, the rotatable hobs being operable to selectively rotate the timber in the work zone.
  • conveyor means are provided on the main frame to move the timber into, and out of, the work zone.
  • the conveyor means extend laterally of the main frame and are foldable for transport.
  • the work head is tiltably mounted on a slider box movable along the running beam, the pivotal movement of the work head controlling the operation of the travelling motor moving the slider box along the running beam.
  • the saw means is vertically movable on the work head and operable to selectively tilt the work head.
  • the movement of the saw means is selectively controllable by the position of the slider box along the running beam.
  • the saw means includes a chain saw cutter bar fitted with a saw chain and driven by a hydr ⁇ aulic motor.
  • the cutter bar is arranged to trail behind and below the work head and is operable, when it engages an obstruction, to tilt the work head until the obstruction is cleared.
  • FIG. 1 is a plan view of the saw bench, the work head and part of the running bea being omitted;
  • FIG. 2 is a side elevational view of the saw bench, sectional along line 2-2 on FIG. 1;
  • FIG. 3 is a sectional view of the saw bench taken on line 3-3 on FIG. 1;
  • FIG. 4 is a sectional view of the saw bench taken on line 4-4 on FIG. 1;
  • FIG. 5 is an elevational view of the side of the work head opposite that shown in FIG. 2.
  • the saw bench has a main frame comprising a central longitudinal box-section spine 10 terminated by a front cross-beam 11 and a rear cross-beam 12.
  • a draw bar frame 13 extends forwardly of the front cross-beam 11 and is provided with a draw-bar hitch 14, operator's platform 15, a seat 16 and hydraulic control panel 17.
  • a rear frame 18 is provided behind the rear cross-beam 12 and the main frame is supported on a pair of longitud ⁇ inal skids 19 between the draw bar frame 13 and the rear frame 18.
  • the skids 19 may be releasably engaged in a pair of channels on a wheeled bogie or trailer (not shown) to facilitate the hauling of the saw bench by a tractor or other suitable prime mover.
  • End plates 20 on the cross-beams 11, 12 support respective front and rear transverse beams 21, 22 above the cross-beams 11, 12.
  • a slider box 23 is mounted on eac transverse beam 21, 22, supported on rollers 24 and is selectively moved along its beam by a chain 25 passing over sprockets 26 mounted on the end plates 20, one of the sprockets 26 of the pair being driven by a reversible hydraulic motor 27.
  • a vertical column 28 is fixed to each slider box 23 and supports a running beam slider 29 which is selectively raised and lowered by a hydraulic ram 30 mounted on the column 28, the slider 29 being provided with supporting rollers 31.
  • a box-section running beam 32 has its forward end connected to the front running beam slider 29 via a pivotal/oscillatable coupling 33.
  • the other end of the running beam 32 is slidably received in a sleeve 34, provided with support rollers 35, mounted on the rear running beam slider 29 via a similar pivotal/ oscillatable coupling 33.
  • the running beam 32 may be raised or lowered or traversed relative to the central spine 10 (which acts as a reference datum) .
  • a work head 36 has a carriage 37 movably mounted on the running beam 32, supported by rollers 38, A reversible hydraulic travelling motor 39 on the carriage 37 drives a pinion (not shown) which engages a chain 40 running along the running beam 32. By selective operatio of the travelling motor 39, the work head 36 may be moved along the running beam 32.
  • a base block 41 is pivotally mounted on a trans- - verse axle 42 mounted under the carriage 37.
  • a pair of parallel slider rails 43 extend upwardly from the base block 41.
  • a post 44 fixed to the axle 42, extends upwardly therefrom and is interconnected to the tops of the slider rails 43 by a cap 45 which supports a hydraulic ram 46.
  • a motor block 47 is slidably mounted on the slider rails 43 and is raised and lowered by the hydraulic ram 46.
  • a chain saw cutter bar 48 is releasably mounted at the lower end of the motor block 47 and is inclined ( so that it trails in the normal direction of travel (arrow A) when cutting timber in the work zone 49 substantially beneath the running beam 32.
  • a saw chain 50 is supported on the cutter bar 48 and is driven by a drive sprocket 51 which, in turn is driven by a chain 52 and sprocket 53 connected to a hydraulic motor (not shown) mounted on the motor block 47.
  • a pair of opposed springs 54 are each connected 0 to the carriage 37 and the post 44. and are operable to move the work head 36 to a normally upright position, the degree of tilt of the work head 36 being limited by stops 55.
  • a bellcrank 56 is pivotally mounted on the base block 41 and has its vertical leg connected to 5 the carriage 37 via a tension spring 57. The other leg of the bellcrank 56 is engaged by the motor block 47 when at its lowermost position on the work head (i.e. when the saw is lowered for cutting) to tilt the work head in the direction of arrow B so that the forward 0 r un of the saw chain 50 lies forwardly of its position when the work head 36 is in its vertical, neutral position.
  • the motor block 47 When the motor block 47 is raised to its uppermost position (adjacent the cap 45) it engages a finger (not shown) which operates a linkage assembly 5 58 to tilt the work head in the direction C.
  • the work head 36 is tilted in the direction of arrow B, the work head 36 travels along the running beam 32 in the direction A and travels in the reverse direction when the work head 36 is tilted in the direction of arrow C.
  • An articulated hose bridge 59 has bridge arms 60, 61 which carry the hydraulic supply lines to the travelling motor 39, saw motor and hydraulic ram 46 on the work head 36, the lines being connected to valves on the operating console 17, and supplied by a motor/ hydraulic pump/reservoir combinationmounted on the rear frame 18.
  • the bridge arm 60 is pivotally mounted at one end on the running beam 32
  • the bridge arm 61 has one end pivotally mounted in a selector box 62 on the carriage 36. Selector ' s 63 on the arm 61 engage valve linkages
  • valves (not shown) which, in turn, control the extension and retractio of the hydraulic ram 46, to raise and lower the motor bloc 37.
  • the relative pivotal movement between the bridge arm 61 and the selector box 62 is relative to the position of the carriage 36 along the running beam 32 so that when the carriage is adjacent the tranverse beam 22, the valves are operated to raise the motor block 47 before the work head 36 is moved back along the running beam 32 to return it to its initial position for the next pass.
  • a pair of transverse conveyors 65 are provided transversely of the main frame to move timber into, and out of, the work zone 49 of the saw bench.
  • Each conveyor has a pair of wings 66 pivotally mounted on opposite sides of the central spine 10.
  • Each wing has a pair of parallel spaced side plates 67 provided with guide tracks 68 along their upper sides and aligned with fixed guide tracks 69 across the central spine 10.
  • a slotted bracket 70 is provided at the end of each side plate 67.
  • a pair of idler sprockets 71 are fitted between the slotted brackets 70 in alignment with the guide track 68.
  • a pair of driving sprockets 72 are fixed on an axle 73 rotatably supported by the brackets.
  • This axle 71 i s driven by a reversible hydraulic motor 74 via a step-down chain/sprocket transmission 75 to select ⁇ ively drive a conveyor chain 76 passing around the sprockets 72, 73 and supported by the guide tracks 68, 69 along its upper run and bearing blocks 77 along its lower run.
  • a pair of hobs 78 (in the form of rotatable tooth discs) are provided on each side of the spine 10 near to the conveyor chains 76 of each conveyor wing 66.
  • the hobs 78 are fixed on axles 79 parallel to the spine and journalled in the upper legs of a pair of Z-shaped bellcranks 80 pivotally mounted about an axle 81 also parallel to the spine 10.
  • the lower legs of the bell ⁇ crank 80 extend below the bottom of the spine 10 and are connected by transverse hydraulic rams 82 which, when extended, raise the hobs above the level of the fixed guide tracks 69 to engage and support timber supported on the tracks in the work zone 49. Stops (not shown) limit the upward movement of the hobs.
  • the two axles 81 on each side of the spine are connected together by a two piece drive shaft 83 fitted with universal joints 84 which enables the hobs 78 to be driven together even if the hobs of one conveyor 65 are in the raised, working position and the hobs 78 of the other conveyor 65 are in the lowered, inactive position.
  • the hobs 78 on both side of the spine 10 are driven in the same direction by a reversible hydraulic motor 85 connected to one end of the axles 79 via a chain/sprocket transmission 86.
  • a sleeper jack 87 is provided adjacent each fixed guide track 69 and is operable to support the timber in the work zone 49 above the conveyor chain 76 when the timber is resting on a flat face.
  • Each sleeper jack has a transverse channel section 88 fitted with a block of timber 89.
  • the channel section 88 is supported on slides (not shown) of the spine 10 for vertical movement between a retracted position resting in the spine 10 ( and below the conveyor chain 76) and a raised position above the conveyor chain 76.
  • the sleeper jacks are raised and lowered by a pair of bellcranks 90 fixed on the ends of a shaft 91 journalled in the spine 10.
  • the lower legs of the bellcranks 90 along each side of the spine 10 are connected by linkages 92 which are. moved parallel to the spine 10 by a hydraulic ram 93 to raise and lower the sleeper jacks.
  • the bench is transported onto a logging site on the wheeled bogie or trailerwith the conveyor wings 66 raised in the travelling position.
  • the bogie or trailer is removed and the conveyor wings 66 lowered to their operating position as shown.
  • the running beam 32 is moved to its desired position relative to the central spine 10 to define a work zone 49 under the running beam. length of, timber is laid across the two conveyor
  • the travelling motor 39 is operated to move the work head 36 along the running beam 32 to a position adjacent the transverse beam 21 to commence its first cutting pass.
  • the main control valve which controls the flow of hydraulic oil to the work head 36 is operated, which isolate the valves controlling the vertical and transverse movement of the running beam 32.
  • the saw motor is set in operation to drive the saw chain 50.
  • the motor block 47 is moved to its lowermost position by the ram 46.
  • the block 37 engages the bellcrank 56 to tilt the work head in the direction of arrow B.
  • This tilting action operates the spool valve which, in turn, operates the travelling motor 39 to move the carriage 37 along the running beam 32 in the direction A and the saw chain 50 cuts through the timber. If an obstruction is encountered by the saw, the obstruction will tend to move the lower point of the saw cutter bar 48 rearwardly against the tension spring 57 interconnecting the bellcrank 56 and the carriage 37. This brings the workhead 36 to its upright, neutral position and the spool valve shuts off the travelling motor 39.
  • one of the selectors 63 on bridge arm 61 operates a valve linkage 64 in the selector box 62 to cause the hydraulic ram 66 to raise the motor block 47.
  • the opposed tension spring 54 return the work head 36 to the upright neutral position, operating the spool valve to stop the travelling motor 39
  • the motor block 47 reaches the cap 45, it operates the finger which, in turn, operates the linkage assembly 58 to tilt the work head 36 in the direction of arrow C.
  • This causes the spool valve to reverse the travelling motor 39 and so move the carriage 37 along the running beam 32 in the direction opposite to directio A to return the work head 36 to its initial position.
  • the included angle between the bridge arms 60, 61 is at a minimum and the second selector 63
  • OMPI on the bridge arm 61 operates the valve linkage 64 in the selector box 62 to cause the hydraulic ram 46 to move the motor block 47 downwardly from the cap 45. As soon as the motor block 47 releases the finger, the work head 36 is returned to its upright neutral position and the travelling motor 39 is stopped.
  • the timber may be rotated by the hobs 78 for the next pass of the saw, and/or the running beam 32 may be traversed or raised or lowered relative to spine 10.
  • the main control valve is operated to move the motor block 47 into engagement with the bellcrank 56 to cause the work head 36 to be tilted in the direction of arrow B and the carriage 37 moves along the running beam 32 in the manner hereinbefore described.
  • the ram 93 is extended:to move the linkages 92 to cause the bellcranks 90 to raise the sleeper jacks 87 and so lift the timber clear of the conveyor chains 76.
  • the blocks 66 are of wood, the saw will not be damaged as it passes through the blocks.
  • the hobs 78 are lowered (and the sleeper jacks 87 lowered/raised) , the hydraulic motor 74 is operated to drive the driving sprockets 72 to thereby operate the conveyors 65 to discharge the timber.
  • a docking saw may be provided adjacent the conveyors to cut the timber to length.
  • the saw bench may have a single conveyor or more than two, the number depending on the length of timber and types of products to be cut.
  • the conveyor 65 may be operated independently, fence posts may be cut separately on each conveyor and the bridge arm 61 provided with selectors 63 so that the work head operates in separate work zones 49 over the two conveyors.
  • the chain saw cutter bar 48 and saw chain 50 may be replaced by a circular saw. However, the arrangement illustrated is preferred as the leading edge of the saw chain 50 tracks the work head 36 and
  • the reversible hydraulic motors e.g. 27, 39, 74

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)

Abstract

Une scierie possède un châssis principal avec une poutre centrale longitudinale (10) pourvue de traverses (21, 22) aux extrémités. Une poutre mobile (32) est montée sur les traverses (21, 22) de manière à pouvoir se déplacer verticalement et latéralement par rapport à la poutre centrale (10) pour définir une zone de travail (49). Une tête de travail (36) possède un chariot (37) pouvant se déplacer le long de la poutre mobile (32). Un bloc moteur (47) est mobile verticalement sur des rails de glissement (43) sur le chariot (37) et est équipé d'une barre de tronçonneuse (48) et d'une chaîne (50). Des convoyeurs transversaux (65) pourvus d'ailes repliables (66) s'étendent de chaque côté de la poutre centrale (10) et possèdent des chaînes (76) permettant de déplacer le bois en direction de la zone de travail (49) ou de l'en éloigner. Des roues dentées rotatives et mobiles verticalement (78) permettent de faire tourner le bois dans la zone de travail (49), tandis que des vérins mobiles verticalement (87) permettent de supporter le bois au-dessus des chaînes du convoyeur (76). Un assemblage à bras pontés (59) relie le chariot (37) et la poutre mobile (32) pour mesurer la position du chariot (37) le long de la poutre mobile (32) et lever ou abaisser le bloc moteur (47) aux extrémités d'une passe, la position du bloc moteur (47) sur le chariot (37) actionnant en tournant un moteur mobile (39) qui déplace le chariot (37) le long de la poutre mobile (32). as
PCT/AU1982/000198 1981-11-25 1982-11-25 Scierie WO1983001921A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU91265/82A AU9126582A (en) 1981-11-25 1982-11-25 Saw bench

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU169281 1981-11-25
AUPF1692811125 1981-11-25

Publications (1)

Publication Number Publication Date
WO1983001921A1 true WO1983001921A1 (fr) 1983-06-09

Family

ID=3692197

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1982/000198 WO1983001921A1 (fr) 1981-11-25 1982-11-25 Scierie

Country Status (1)

Country Link
WO (1) WO1983001921A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2726781A1 (fr) * 1994-11-15 1996-05-15 Logsys Installation pour le tronconnage et/ou l'usinage de grumes
CN111515759A (zh) * 2020-05-29 2020-08-11 江西吉米立机械科技有限公司 一种天车式三轴龙门加工中心机

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933111A (en) * 1957-08-01 1960-04-19 Leslie A Fish Radial arm saw
US2987085A (en) * 1958-08-01 1961-06-06 Burke E Porter Machinery Co Automatic sequencing wood saw and clamp

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933111A (en) * 1957-08-01 1960-04-19 Leslie A Fish Radial arm saw
US2987085A (en) * 1958-08-01 1961-06-06 Burke E Porter Machinery Co Automatic sequencing wood saw and clamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2726781A1 (fr) * 1994-11-15 1996-05-15 Logsys Installation pour le tronconnage et/ou l'usinage de grumes
CN111515759A (zh) * 2020-05-29 2020-08-11 江西吉米立机械科技有限公司 一种天车式三轴龙门加工中心机

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