US3245443A - Multi-arm debarker - Google Patents

Multi-arm debarker Download PDF

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Publication number
US3245443A
US3245443A US351471A US35147164A US3245443A US 3245443 A US3245443 A US 3245443A US 351471 A US351471 A US 351471A US 35147164 A US35147164 A US 35147164A US 3245443 A US3245443 A US 3245443A
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US
United States
Prior art keywords
arms
log
ring
debarker
tools
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US351471A
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English (en)
Inventor
Dean W Shields
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beloit Corp
Original Assignee
Beloit Corp
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
Priority to DENDAT1287789D priority Critical patent/DE1287789B/de
Application filed by Beloit Corp filed Critical Beloit Corp
Priority to US351471A priority patent/US3245443A/en
Application granted granted Critical
Publication of US3245443A publication Critical patent/US3245443A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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

  • This invention relates to apparatus for debarking logs and specifically to the general type of debarker known as a rotary ring machine.
  • the prime object of my invention is to provide an improved log debarker in which a plurality of tools, rotating in different planes axially spaced along the log, engage the bark at different axially spaced positions thereon, whereby the speed of the log may be increased while at the same time insuring the complete removal of the bark.
  • Another object of my invention is to provide a rotary ring debarker having at least two sets of debarking arms carrying de'barking tools, the arms preferably being mounted on opposite sides of the ring, whereby, when desired, the set of tools on the infeed side of the ring may be biased into contact with the log with greater force than the tools on the outfeed side, permitting what might be called a hard cut on the infeed side and a finish cut on the outfeed side.
  • a further and more specific object of my invention is to provide a debarker of the character designated in which the sets of arms on either side of the ring are equiangularly spaced relative to the arms on the other side, resulting in an extremely compact arrangement and one which is substantially dynamically balanced
  • Apparatus illustrating features of my invention is shown in the accompanying drawing forming a part of this application, in which:
  • FIG. 1 is an elevational view looking at the machine from the infeed side
  • FIG. 2 is an enlarged view of the ring completely removed from the apparatus and also looking at the same from the infeed side, some of the debarker arms being omitted; 7
  • FIG. 3 is a view of the ring from the outfeed side, some of the debarker arms being omitted;
  • FIG. 4 is an enlarged detail sectional view taken generally along line 4-4 of FIG. 3.
  • FIG. 1 in somewhat diagrammatic form a log debarker embodying a main vertical frame together with cross members 11 at the top and 12 at the bottom.
  • the debarking ring R Rotatably mounted as will later be explained in a vertically movable frame 15 is the debarking ring R which carries several sets of tool arms as also will be explained more in detail.
  • the ring is driven by a chain 10 from a driven sprocket 10 Feed works for moving the log axially through the ring includes the lower roll 13 which is driven from a pulley 14- from any suitable source of power, not shown, and the upper hold-down roll 16.
  • the roll 16 may be moved downwardly under the influence of a hydraulic cylinder 17, to rest on top of the log and hold it down.
  • a hydraulic cylinder 17 It will be understood that the ring itself is mounted in the framework 15 which may be raised and lowered through a hydraulic cylinder 18, the piston rod of which is indicated at 18 whereby it may be centered relative to any given size log being passed through the apparatus. It will be understood that the ring is driven in the direction of the arrows in the several figures.
  • My invention consists in the construction of the ring itself and the provision of multiple sets of debarking arms on each side thereof as will now be described.
  • the dbearking arms A on the infeed side and the debarking arms B on the outfeed side are journaled on stub shafts 19. Since each mounting is identical, a description of one will sufiice. More in detail, the shafts 19 have shank portions 21 which are secured by nuts 22 to an annular member 23 forming a part of the ring. Bearings 24 and 26 are provided for mounting the hub 27 of each arm rotatably on the shaft 19. A plate 28 covers the end of the hub 27. It will further be noted that the ring is substantially duplicated on either side of the vertical center line thereof as viewed in'FIG. 4.
  • annular, L-shaped bearing members of brass or the like which are secured by screws 31 into a portion of the vertically movable frame 15 of the debarker.
  • Front and rear face plates 33 of the ring are welded to concentric annular members 34 and these in turn are secured by a plurality of bolts 36 to the annular central portion of a sprocket 37.
  • the bolts 36 pass through openings 38 in drive sprocket 37.
  • the ring of course has a centrally disposed log passing opening 0.
  • the arms A are mounted identically with the arms B and the description of the same is not deemed necessary. However, as shown in FIGS. 2 and 3 it will be seen that the sets of arms A and B are equiangularly spaced relative to each other on their respective sides of the ring so that the ring is dynamically balanced.
  • the arms A and B carry tools 41 which are adapted to engage a log passing axially through the center of the apparatus.
  • the desirable limit of these tools in length is about 3 /2 inches.
  • this means comprises a flexible member such as a cable 42 which is anchored generally in the region 43 to each of the tool arms A or B, outwardly of the pivot points thereof.
  • the flexible member is secured at its other end to a rod 45 having a threaded end 45*.
  • a compression spring 44 has one end resting against a wall 46 of a housing 47 which is mounted to I the side of the ring.
  • a nut and washer combination 45 is provided so that compression on the springs and hence the tool force may be adjusted and varied within wide limits.
  • the nose 48 of each arm is so contoured as to compensate for the decrease in pressure of the spring 44 due to travel thereof, centrifugal force, tool arm movement, etc., all as is disclosed in the aforesaid application. Suffice it here to say that the arms A and B are each provided with individual adjustable means for biasing the tools 41 thereof into engagement with the log to be do barked.
  • the ring R is provided with two complete sets of debarking arms spaced axially along the length of the log. Therefore, when a log starts into thedebarker on the infeed side the arms A first engage the bark and as the log progresses through the ring the set of arms B on the outfeed side in turn engage the log.
  • the second set of arms B assure complete removal of the bark even though some of it may not have been removed at all by the first set A, or only partly loosened from the log by the first set.
  • (c) means pivotally mounting the sets of arms to the ring at points lying on circles of substantially equal radius from the center of the ring, and the centers of said pivots of each set of arms being substantially equiangularly spaced relative to the centers of the arm pivots of the other set.
  • debarker ring as set forth in claim 3 in which a peripherally extending drive sprocket is secured to the ring between the two sets of arms.
  • ((1) means mounting the spaced tool arms for rotation about the log, whereby bark is simultaneously removed from the surface of the log at a plurality of places along the axis thereof by said tools rotating in axially spaced planes.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
US351471A 1964-03-12 1964-03-12 Multi-arm debarker Expired - Lifetime US3245443A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DENDAT1287789D DE1287789B (enExample) 1964-03-12
US351471A US3245443A (en) 1964-03-12 1964-03-12 Multi-arm debarker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US351471A US3245443A (en) 1964-03-12 1964-03-12 Multi-arm debarker

Publications (1)

Publication Number Publication Date
US3245443A true US3245443A (en) 1966-04-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
US351471A Expired - Lifetime US3245443A (en) 1964-03-12 1964-03-12 Multi-arm debarker

Country Status (2)

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US (1) US3245443A (enExample)
DE (1) DE1287789B (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6457499B1 (en) * 1999-12-07 2002-10-01 Ronald D. Pousette Rotary ring debarker with debarker tools arranged in offset rotary debarking planes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3923196A1 (de) * 1989-07-13 1991-01-17 Michael Geisenhofer Entrindungsmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6457499B1 (en) * 1999-12-07 2002-10-01 Ronald D. Pousette Rotary ring debarker with debarker tools arranged in offset rotary debarking planes

Also Published As

Publication number Publication date
DE1287789B (enExample) 1969-01-23

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