US3058500A - Ring type debarker - Google Patents

Ring type debarker Download PDF

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Publication number
US3058500A
US3058500A US837165A US83716559A US3058500A US 3058500 A US3058500 A US 3058500A US 837165 A US837165 A US 837165A US 83716559 A US83716559 A US 83716559A US 3058500 A US3058500 A US 3058500A
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United States
Prior art keywords
force
tools
log
arms
ring
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Expired - Lifetime
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US837165A
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English (en)
Inventor
Lloyd B Smith
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Individual
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Individual
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Publication date
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Priority to US837165A priority Critical patent/US3058500A/en
Priority to GB29133/60A priority patent/GB896754A/en
Priority to FR836765A priority patent/FR1268703A/fr
Priority to CH361393D priority patent/CH361393A/fr
Application granted granted Critical
Publication of US3058500A publication Critical patent/US3058500A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B27L1/08—Debarking or removing vestiges of branches from trees or logs; Machines therefor using rotating rings

Definitions

  • my invention contemplates a rotary ring debarker in which the tools are held to their work by forces which are substantially constant throughout the entire range of log sizes for which the apparatus is designed.
  • a more specific object is to provide apparatus of the character designated in which the tool loading force may be obtaineed either by a spring for each tool or by a wraparound type elastic member, common to all the tools, the elastic member being mounted to rotate bodily with the ring as distinguished from being non-rotatably mounted reliative thereto.
  • a further object is to provide in combination with either of the above tool loading means counterweights effective substantially to eliminate the variable loading of the tools which otherwise prevails by reason of centrifugal force as the ring rotates.
  • a still further object is to load each tool through simple, uncomplicated and rugged linkages, assuring long, trouble-free service from the apparatus.
  • FIG. 1 is a side elevational view, partly broken away
  • FIG. 2 is an enlarged fragmental view taken generally along line 2-2 of FIG. 1 and showing the tools loaded to their work by means of my improved continuous elastic member;
  • FIG. 3 is a detail sectional view taken generally along line 3-3 of FIG. 2;
  • FIG. 4 is a view looking at the opposite side of the apparatus from that shown in FIG. 2 and illustrating the counterweights for the tools;
  • FIG. 5 is a detail sectional view taken generally along line 55 of FIG. 4 and showing one of the supporting rollers for the rotary ring;
  • FIG. 5 is a diagrammatic view illustrating the change in the effective lever arm through which the tool loading force is applied in different positions of the tools
  • FIG. 6 is a view corresponding generally to FIG. 2, on an enlarged scale, and showing a modified form of tool loading mean embodying springs;
  • FIG. 7 is an enlarged detail view of one of the spring loading means and the linkages for transmitting the force thereof to the tools.
  • FIG. 8 is a diagrammatic view illustrating the manner of transmitting force to the debarking tools.
  • FIGS. 1 to 5 inclusive I illustrate my invention in association with a ring type debarker which has associated therewith a log infeed mechanism indicated generally by the numeral 10 and an outfeed mechanism for the debarked logs indicated generally by the numeral 11.
  • the debarker proper is indicated in FIG. 1 generally by the letter D.
  • a motor 12 shown in FIG. 2 drives the ring of the debarker by means presently to be described, while a motor 13 drives the log infeed and log outfeed mechanisms 10 and 11.
  • the debarker D comprises generally a ring formed of a pair of spaced plates 14 mounted on grooved rollers 16 in a frame made up of plates 17 and 18.
  • the plates 17 and 18 are supported in vertical framework 19.
  • a sprocket 21 is carried by the ring and a chain 22 passes over the sprocket 21 and over a sprocket 23 on a jack shaft 24 mounted in suitable bearings from the adjacent vertical supporting frame 19.
  • the motor 12 drives the jack shaft 24 by means of a V-belt 26.
  • the entire ring and plates 17 and 18 are mounted for vertical movement in the supporting framework 19. Movement is accomplished by means of a fluid pressure cylinder 27 mounted on a cross member 28. A yoke 29 is carried by the piston rod 31 of the cylinder and in turn is connected by rods 32 to the entire mechanism comprising the plates 17-18 and the rotary ring.
  • the mechanism thus can be accommodated to logs of different diameters without the necessity of raising or lowering the infeed and outfeed mechanisms 10 and 11.
  • My invention comprises the manner of loading the debarking tools 33.
  • the tools 33 are carried on the outer ends of arms 34- which are fast on pins indicated at 36 and the pins pass through both of the rings 14 and are supported for rotation therein in suitable bearings indicated at 37.
  • the arms 34 are sloped on the infeed sides thereof so that as a log approaches the ring the arms spread outwardly to admit the log.
  • each arm 34 mounteded on each arm 34, opposite the pivot point formed by the pin 36, is a counterweight 38.
  • the counterweights 38 are of such magnitude so as to exert a force on the arms and hence the tools 33 to nullify the change in working pressure of the tools 33 occasioned by the centrifugal force-weight relationship of the arms 34 and tools 33- as the ring rotates. Stops 39 are provided against which the outer ends of the arms carrying the 3 counterweights may rest to limit the inward movement of the arms.
  • each pin 36 Secured to the opposite end of each pin 36, that is, on the infeed side of the machine, is an arm 41.
  • the arms 41 carry rollers 42 in their outer ends which are mounted on suitable bearings in turn carried on pins 43 in the outer ends of the arms.
  • One form of my improved means for urging the tools 33 toward the log L comprises an endless resilient member 44 and which is stretched taut over the rollers 42 on the ends of the arms 41.
  • the member 44 may well be an endless length of shock cord such as is used for shock absorber purposes in connection with aircraft landing gear.
  • This material generally is made of a plurality of strands of rubber and when stretched forms a very efficient and long lasting force exerting member.
  • the elastic member 44 rotates with the arms 41 and the ring as distinguished from having the ends of the same anchored to the stationary frame, as for instance in Patent No. 2,843,168, issued July 15, 1958, to Edward O. Lunn.
  • FIGS. 6, 7 and 8 I show a modified form of force exerting means for the tool arms 34.
  • I provide brackets 48, one for each tool arm, on the side of one of the ring plates 14 and these form seats for coil springs 49.
  • Passing through each spring 49 is a shaft 51 having an outer threaded end 52 carrying a pair of lock nuts 53.
  • the spring surrounds a cylindrical member 54 which prevents the spring from'collapsing.
  • Mounted about the cylinder 54 is a slide member 56.
  • a pin 57 passes through the shaft 51 and rests on top of a flange of the member 56 and in turn slides in slots 58 in the side walls of the cylinder 54.
  • the slide 56 rests against the upper end of the spring and compresses it between the slide and the bracket 48 as the shaft 51 moves inwardly.
  • each of the members 51 are pivotally connected at 59 to a force exerting arm 61 in turn pivotally connected at 62 to bracket 63 on the ring plate 14.
  • Torque on tool arm equals the effective length of the lever arm indicated by line 70 times the force exerted by spring 49 times the length of the lever arm indicated by line 69 divided by the length of the lever arm indicated by line 69
  • the torque applied to the tool arms is substantially equal to that in the full line position because of the torque decreasing eifect of the eflect of the ratio of the length of the lever arm indicated by line 70 divided by the length of the lever arm indicated by line 71
  • the springs 49 may be selected so that a relatively large range of log sizes is permissible. Further, the force exerted by the springs may be regulated by means of the nuts 53 on the threaded shafts 51, in addition to building into the machine by proper proportioning of the arm lengths such force as may be desired or necessary.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Jigs For Machine Tools (AREA)
  • Manufacture Of Wood Veneers (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
US837165A 1959-08-31 1959-08-31 Ring type debarker Expired - Lifetime US3058500A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US837165A US3058500A (en) 1959-08-31 1959-08-31 Ring type debarker
GB29133/60A GB896754A (en) 1959-08-31 1960-08-23 Ring type debarker
FR836765A FR1268703A (fr) 1959-08-31 1960-08-25 Perfectionnement aux outils à écorcer
CH361393D CH361393A (fr) 1959-08-31 1960-08-29 Appareil à écorcer les billes ou grumes de bois

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US837165A US3058500A (en) 1959-08-31 1959-08-31 Ring type debarker

Publications (1)

Publication Number Publication Date
US3058500A true US3058500A (en) 1962-10-16

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Application Number Title Priority Date Filing Date
US837165A Expired - Lifetime US3058500A (en) 1959-08-31 1959-08-31 Ring type debarker

Country Status (4)

Country Link
US (1) US3058500A (fr)
CH (1) CH361393A (fr)
FR (1) FR1268703A (fr)
GB (1) GB896754A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128806A (en) * 1963-11-20 1964-04-14 shields
US3863692A (en) * 1972-10-21 1975-02-04 Eho Ind Co Ltd Bark stripping machine
US4020883A (en) * 1976-04-30 1977-05-03 Nicholson Manufacturing Company Feed works for rotary ring log barkers
EP1704974A3 (fr) * 2005-03-24 2006-12-06 Josef Wiedemann Contrainte et fixation des couteaux d'une machine à écorcer à rotor annulaire ainsi que dispositif d'entraînement simplifié des rouleaux d'alimentation en entrée et sortie
CN106827146A (zh) * 2016-12-25 2017-06-13 重庆坤秀门窗有限公司 木料加工生产线

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2448689A (en) * 1944-10-16 1948-09-07 Auxilius P Schnyder Debarking apparatus
US2692623A (en) * 1951-03-22 1954-10-26 Svenska Cellulosa Ab Debarking machine having bark-removing members yieldably connected to centrifugally-actuated weights
US2786499A (en) * 1953-03-30 1957-03-26 Soderhamns Verkst Ers Aktiebol Rotary debarker having pivotal barkremoving tools biased by elastic rubber
US2787304A (en) * 1950-05-27 1957-04-02 Brundell Per Gunnar Machine for removing bark from logs
CA543522A (fr) * 1957-07-16 R. Snyder Rienhold Dispositif mecanique a ecorcer les billes
US2843168A (en) * 1957-04-22 1958-07-15 Edward O Lunn Rotary-ring debarker having cablebiased springy-blade scrapers
US2880771A (en) * 1955-03-17 1959-04-07 Improved Machinery Inc Bark-removing tools mounted on revolving self-opening arms
US2904085A (en) * 1955-06-20 1959-09-15 Gen Engineering Company A B Revolving bark-removing tools simultaneously biased by endless pressure-equalizing band
US2918952A (en) * 1957-06-07 1959-12-29 Ronald W Searle Log debarking machine having universally mounted and inwardly biased cutters

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA543522A (fr) * 1957-07-16 R. Snyder Rienhold Dispositif mecanique a ecorcer les billes
US2448689A (en) * 1944-10-16 1948-09-07 Auxilius P Schnyder Debarking apparatus
US2787304A (en) * 1950-05-27 1957-04-02 Brundell Per Gunnar Machine for removing bark from logs
US2692623A (en) * 1951-03-22 1954-10-26 Svenska Cellulosa Ab Debarking machine having bark-removing members yieldably connected to centrifugally-actuated weights
US2786499A (en) * 1953-03-30 1957-03-26 Soderhamns Verkst Ers Aktiebol Rotary debarker having pivotal barkremoving tools biased by elastic rubber
US2880771A (en) * 1955-03-17 1959-04-07 Improved Machinery Inc Bark-removing tools mounted on revolving self-opening arms
US2904085A (en) * 1955-06-20 1959-09-15 Gen Engineering Company A B Revolving bark-removing tools simultaneously biased by endless pressure-equalizing band
US2843168A (en) * 1957-04-22 1958-07-15 Edward O Lunn Rotary-ring debarker having cablebiased springy-blade scrapers
US2918952A (en) * 1957-06-07 1959-12-29 Ronald W Searle Log debarking machine having universally mounted and inwardly biased cutters

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128806A (en) * 1963-11-20 1964-04-14 shields
US3863692A (en) * 1972-10-21 1975-02-04 Eho Ind Co Ltd Bark stripping machine
US4020883A (en) * 1976-04-30 1977-05-03 Nicholson Manufacturing Company Feed works for rotary ring log barkers
EP1704974A3 (fr) * 2005-03-24 2006-12-06 Josef Wiedemann Contrainte et fixation des couteaux d'une machine à écorcer à rotor annulaire ainsi que dispositif d'entraînement simplifié des rouleaux d'alimentation en entrée et sortie
CN106827146A (zh) * 2016-12-25 2017-06-13 重庆坤秀门窗有限公司 木料加工生产线

Also Published As

Publication number Publication date
CH361393A (fr) 1962-04-15
GB896754A (en) 1962-05-16
FR1268703A (fr) 1961-08-04

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