US1937073A - Disbarking machine - Google Patents

Disbarking machine Download PDF

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Publication number
US1937073A
US1937073A US580405A US58040531A US1937073A US 1937073 A US1937073 A US 1937073A US 580405 A US580405 A US 580405A US 58040531 A US58040531 A US 58040531A US 1937073 A US1937073 A US 1937073A
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United States
Prior art keywords
trunk
chain
machine
disbarking
arms
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Expired - Lifetime
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US580405A
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English (en)
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Stuve Heinrich
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Individual
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Individual
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    • 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
    • B27L1/00—Debarking or removing vestiges of branches from trees or logs; Machines therefor
    • B27L1/12—Debarking or removing vestiges of branches from trees or logs; Machines therefor using pliable tools, e.g. chains, cables
    • B27L1/127—Debarking or removing vestiges of branches from trees or logs; Machines therefor using pliable tools, e.g. chains, cables in the form of circulating endless elements, e.g. cutting chains

Definitions

  • This invention relates to a novel portable machine for disbarking or peeling timber and comprises as an essential element a traveling chain equipped with disbarking tools which may be ap-.
  • My invention provides a disbarking machine which is easily portable and permits the use of the aforementioned advantages offered by the use of a chain in stationary machines also for the disbarking of felled timber lying on the ground in forests.
  • the chain of my present ma- :hine is only of a very small width and the machine is shifted along the trunk of timber when removing the bark therefrom.
  • Especially good peeling properties may be attained with my present machine if a chain is used which is provided on its side towards the trunk of timber with smooth sliding surfaces and equipped with peeling knives only at its front edge.
  • a chain constructed in this manner may be carried around a trunk of timher to slide round the trunk at great velocity, for instance, of an eifectiveness equal to that used in connection with band-saws.
  • the bark may be removed with my present machine from the trunk of timber by shifting or feeding the machine forward along the trunk during the operation of disbarking, without injuring the surface of the wood by the peeling tools.
  • a machine constructed according to my invention will produce an amount of work equal to from ten to twenty times that heretofore attainable by hand.
  • Fig. 1 is a side view of my new machine during its application to the trunk of timber, with some parts in section
  • Fig. 2 an enlarged diagrammatic longitudinal section through the trunk with the chain and disbarking tools partly in cross-section
  • Fig. 3 a top-view of the chain and the disbarking tools shown in Fig. 2
  • Fig. 4 a cross-section through the trunk with the chain and disbarking tools in end view
  • Fig. 5 a section similar to Fig. 2 showing a modified construction of the disbarking tools.
  • Figs. 1 to 3 the general construe-.- tion and mode of operation of my present machine is as follows: Mounted upon the shaft of the motor 1 is a sprocket wheel e which serves for imparting motion to the chain t with the peeling tools 12 thereon. Further guide or sprocket wheels h, m and o serve for guiding the chain it around the trunk a. Only a small portion of the chain along the trunk is shown in Fig. 1, while the greater part of said chain is merely indicated by a dash-and-dot line for the sake of clearness. In Fig. 1 it is assumed that motion of the chain takes place from left to right over the bark of the trunk of timber.
  • the lever mechanism for operating the machine and for adjusting the chain t comprises a lever b permitting to operate a further lever 0 having the form of a telescope arm with the tension roller 0- thereon, a transmission gear 11 intermediate said lever b and said lever c, said levers thus positively adjusting the length of the portion of the chain intermediate the guide or sprocket wheels m and h to span the trunk of timber independently of its diameter about the same portion of its circumference, whenever the lever 17 and the arm a are pressed against the trunk.
  • the amount of span of the chain is so chosen that about one half of the circumference of the trunk is worked by the chain, as in this case, and it will be possible to fully disbark the trunk in two working steps.
  • the former is'swung into inoperative position, that is towards the arm a by action of the spring g, the tension lever 0 having its largest deflection in this "condition of the machine.
  • the spring 'p within the telescoping tension lever c provision is made to always keep the chain t in tensioned condition.
  • the spring p is preferably so dimensioned that during operation of the machine, that is during disbarking a trunk of timber, said spring will not be quite in its end position but have a certain play. -This play allows the tension roller 0 to accommodate itself to any stress on the chain t by uneveness of the trunk, which may occur on the way of the machine.
  • rollers l and k serve for shifting or feeding forward the machine along the full length of the trunk, said rollers l and k being preferably driven from the shafts of the guide or sprocket wheels m and h, preferably by means of worm gears as indicated at i and n in Fig. 1.
  • the disbarking machine as a whole is kept in position by an attendant which walks along the trunk of timber during operation of the machine.
  • FIG. 2 clearly shows the chain t moves upon slide surfaces w and w around the trunk z.
  • the cutting edges 12 of the knives are positioned laterally of the chain and bent in upward direction.
  • Fig. 2 shows that the cutting edges of the knives v at the upper end of the trunk will always be carried therearound at a proper distance therefrom.
  • the cutting edges are made to extend not entirely down to the plane of the slide surfaces 10 and w on the chain.
  • a part of the bast hide g which is only of small'thickness, as compared with the bark a: proper, will be kept out of contact with the edges of the knives v and removed with certainty by said surfaces w and in, which slide on the wet bast hide and take it oif by friction.
  • the chain By subdividing the slide surface of the chain into two parts w and w which are sepa-- rated from each other by an interstice the chain will be securely guided and always assume a stable position, even in case of an irregular surface of the trunk; as a result of this there will be attained proper and full separation of the bark at: including the bast hide y independently of the thickness of the bark and without any loss of wood.
  • the distance between the two rollers h and m is enlarged by swinging the movable lever 11 outward to such an extent that the machine may now be set upon the trunk with the lever b and the arm a straddling the trunk. In this position the machine is ready for the operation of disbarking the trunk a.
  • a pressure upon the feed rollers k and Z may also be exerted a pressure upon the feed rollers k and Z and this pressure may be regulated during operation of the machine.
  • the feeding motion imparted to the machine may be varied independently of the velocity of the chainby shifting the points of contact between said rollers and the trunk in axial direction of said rollers.
  • the result may be attained that thepoints of contact between the trunk and the rollers-maybe displaced in such manner that the middle portion of the roller surface is always in contactf'with the trunk, independently of the diameter of the trunk.
  • the chain which constitutes the carrier for the peeling knives may be of various forms of construction as shown, for instance, in Figs. 2, 3, 4 and 5.
  • Figs. 2, 3 and 4 cutting edges 0 are provided at the side t of the chain, said cutting edges 12 being integral with the slide members w and 10 as shown especially in Fig. 3.
  • a roller chain is preferable in view of the large velocity attainable therewith. Since roller chains have only very thin chain links ofiering rather small slide surfaces, it will be preferable to use a roller chain having its links equipped with special extensions forming the slide surfaces. In order to keep these slide surfaces at one of their edges as much as possible in a position parallel to the trunk, it is preferable to give said slide surfaces a width essentially greater than the width of the chain.
  • chain links may also be made of such strength that the contact with the trunk will be sufliciently large to act as a slide surface; in this case the knives or cutting edges may be bent out of the chain links as indicated in Fig. 5.
  • the trunk of timber After having disbarked the upper half of the trunk of timber, the latter is rotated through an angle of 180 so that now also the bark may be removed from the other half of the trunk.
  • the thin end of the trunk is preferably placed upon a jack which is equipped with a ripp g or fastening device to keep the trunk in position.
  • a machine for debarking trlmks comprising a frame mounted for movement longitudinally of the trunk, said frame including arms designed to slidably grip the trunk, and a debarking element carried by the frame and arms and operating transversely between the arms, said debarking element including cutting elements operating above the trunk-engaging portion of the element.
  • a machine for debarking trunks comprising a frame mounted for movement longitudinally of the trunk, said frame including arms designed to slidably grip the trunk, and a debarking element carried by the frame and arms and operating transversely between the arms, said debarking element including relatively fiat trunk-bearing surfaces with outstanding, upturned cutting elements.
  • a debarking machine including a frame, arms carried thereby for opposed bearing on a tree trunk, one of the arms being movable with respect to the frame, an endless debarking element carried by the frame and arms and having a portion intermediate the arms for cooperation with the bark on the trunk, and means automatically controlled by the relative spacing of the arms for tensioning said element.
  • a debarking machine including a frame, an arm rigid therewith, an arm movably mounted therein, means at the free terminals of the arms for engaging a tree trunk on opposite sides thereof, a flexible debarking element movable in the frame and arms and. cooperating with the bark on the tree intermediate the arms, means carried by the frame for operating the element, and means carried by the arms for moving the frame longitudinally of the tree trunk, said means being operated in the movement of the debarking element.
  • a flexible debarking element for debarking machines including a chain-like member'having relatively flat bearing portions to engage a tree trunk, and cutters carried by said bearing portions and upturned relative thereto for cutting the bark.
  • a debarking machine including a frame, arms carried thereby, one of the arms being movable with respect to the frame, an endless chain movable in the frame and in the arms and presenting an operative area between the free ends of the arms, debarking cutters carried by the chain, a tensioning arm carried by the frame over which the chain passes, and means for operating the tensioning arm in the movement of the movable arm to maintain the chain tensioned regardless of the spacing between the arms.
  • a debarking machine including a frame, arms carried thereby, one of the arms being movable with respect to the frame, an endless chain movable in the frame and in the arms and presenting an operative area between the free ends of the arms, debarking cutters carried by the chain, a tensioning arm carried by the frame over which the chain passes, means for operating the tensioning arm in the movement of the movable arm to maintain the chain tensioned regardless of the spacing between the arms, rollers carried by the arms to engage a tree trunk, and means for operating the rollers for feeding the frame longitudinally of the tree trunk in the movement of the chain.
  • tensioning arm is formed of a partially hollow sleeve having a second partially hollow sleeve slidable therein and forced apart by a compression spring carried to said sleeves.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Harvester Elements (AREA)
US580405A 1930-08-18 1931-12-11 Disbarking machine Expired - Lifetime US1937073A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1937073X 1930-08-18

Publications (1)

Publication Number Publication Date
US1937073A true US1937073A (en) 1933-11-28

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ID=7750290

Family Applications (1)

Application Number Title Priority Date Filing Date
US580405A Expired - Lifetime US1937073A (en) 1930-08-18 1931-12-11 Disbarking machine

Country Status (5)

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US (1) US1937073A (id)
CH (1) CH163622A (id)
DE (1) DE591538C (id)
FR (1) FR731261A (id)
SE (1) SE77529C1 (id)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508784A (en) * 1948-11-13 1950-05-23 Oregon Saw Chain Mfg Corp Power saw chain
US2569207A (en) * 1948-01-19 1951-09-25 Atlas Imp Diesel Engine Co Pear peeling apparatus
US2575422A (en) * 1945-09-24 1951-11-20 Einer A Laulainen Apparatus for pressing bark-removing cables against a pile, pile, or log
US2576127A (en) * 1945-11-19 1951-11-27 Svenska Cellulosa Ab Machine for barking logs
US2576912A (en) * 1944-03-01 1951-12-04 Svenska Cellulosa Ab Rotatable hollow-head debarker mounting flexible bark-removing elements
US2632487A (en) * 1947-10-31 1953-03-24 Ind Engineering Ltd Portable tree girdling machine
US2707007A (en) * 1953-06-08 1955-04-26 Shuff Hugh Wrap-around chain-driven cutters for removing bark from trees
US2760534A (en) * 1955-03-07 1956-08-28 Hansel Sydney Cable-type bark-removal devices
US2785715A (en) * 1952-09-24 1957-03-19 Soderhamns Verkst Ers Aktiebol Arrangement for feeding forward of logs and the like
US2831515A (en) * 1956-03-29 1958-04-22 Potts Lumber Company Slab barker
US2871620A (en) * 1955-12-29 1959-02-03 Charles G Bathe Palm tree trimmer
US2897859A (en) * 1956-01-04 1959-08-04 Improved Machinery Inc Log-centering barker feeding mechanism
US2923486A (en) * 1955-08-19 1960-02-02 Sr Alvin E Betzel Power driven pipe wrapping machine
US2948311A (en) * 1958-10-20 1960-08-09 Melvin W Mccollum Tree harvesting apparatus
US3093170A (en) * 1960-03-04 1963-06-11 Julius A Thayer Portable log debarking machine
US3158956A (en) * 1961-02-20 1964-12-01 Mcculloch Corp Tree girdler
US3565143A (en) * 1967-07-05 1971-02-23 Rotenburger Metallwerke Gmbh Chain cutter for debranching and/or debarking trees
US3566938A (en) * 1966-03-09 1971-03-02 Rotenburger Metallwerke Gmbh Chain cutter for debranching and debarking trees
US4595041A (en) * 1984-07-30 1986-06-17 Robert A. Fox Portable log peeling apparatus having a draw knife

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH359924A (de) * 1957-08-20 1962-01-31 Leo Longert Christian Maschine zum Entrinden und Entasten stehender Bäume
DE1209275B (de) * 1964-06-18 1966-01-20 Heinrich Postler Jun Tragbare Maschine zum Entrinden von Stammholz
CN112060252B (zh) * 2020-09-18 2022-07-01 嘉兴市名人电器股份有限公司 一种弯曲不规则杉树木材用刮皮设备

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2576912A (en) * 1944-03-01 1951-12-04 Svenska Cellulosa Ab Rotatable hollow-head debarker mounting flexible bark-removing elements
US2575422A (en) * 1945-09-24 1951-11-20 Einer A Laulainen Apparatus for pressing bark-removing cables against a pile, pile, or log
US2576127A (en) * 1945-11-19 1951-11-27 Svenska Cellulosa Ab Machine for barking logs
US2632487A (en) * 1947-10-31 1953-03-24 Ind Engineering Ltd Portable tree girdling machine
US2569207A (en) * 1948-01-19 1951-09-25 Atlas Imp Diesel Engine Co Pear peeling apparatus
US2508784A (en) * 1948-11-13 1950-05-23 Oregon Saw Chain Mfg Corp Power saw chain
US2785715A (en) * 1952-09-24 1957-03-19 Soderhamns Verkst Ers Aktiebol Arrangement for feeding forward of logs and the like
US2707007A (en) * 1953-06-08 1955-04-26 Shuff Hugh Wrap-around chain-driven cutters for removing bark from trees
US2760534A (en) * 1955-03-07 1956-08-28 Hansel Sydney Cable-type bark-removal devices
US2923486A (en) * 1955-08-19 1960-02-02 Sr Alvin E Betzel Power driven pipe wrapping machine
US2871620A (en) * 1955-12-29 1959-02-03 Charles G Bathe Palm tree trimmer
US2897859A (en) * 1956-01-04 1959-08-04 Improved Machinery Inc Log-centering barker feeding mechanism
US2831515A (en) * 1956-03-29 1958-04-22 Potts Lumber Company Slab barker
US2948311A (en) * 1958-10-20 1960-08-09 Melvin W Mccollum Tree harvesting apparatus
US3093170A (en) * 1960-03-04 1963-06-11 Julius A Thayer Portable log debarking machine
US3158956A (en) * 1961-02-20 1964-12-01 Mcculloch Corp Tree girdler
US3566938A (en) * 1966-03-09 1971-03-02 Rotenburger Metallwerke Gmbh Chain cutter for debranching and debarking trees
US3565143A (en) * 1967-07-05 1971-02-23 Rotenburger Metallwerke Gmbh Chain cutter for debranching and/or debarking trees
US4595041A (en) * 1984-07-30 1986-06-17 Robert A. Fox Portable log peeling apparatus having a draw knife

Also Published As

Publication number Publication date
DE591538C (de) 1934-01-23
FR731261A (fr) 1932-08-31
CH163622A (de) 1933-08-31
SE77529C1 (id) 1933-06-13

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