US2461924A

US2461924A - Impact type log peeler

Info

Publication number: US2461924A
Application number: US631025A
Authority: US
Inventors: Charles J Robertson
Original assignee: Individual
Current assignee: Individual
Priority date: 1945-11-27
Filing date: 1945-11-27
Publication date: 1949-02-15
Anticipated expiration: 1966-02-15

Description

c. J. RoBEiws'oN.

IMPACT TYPE LOG PEELER Feb. '15, 1949.

5 Sheets-Sheet 1 Filed NOV. 27, 1945 3 m aclfioh 1 26.0 72- Feb. .15," 1949. c. ROBERTSON IMPACT TYPE 1406' PEELER s Sheets-Sheet .2

Filed NOV. 27, 1945 fiofieriaon" 4 C. J. ROBERTSON IMPACT TYPE LOG PEELER Feb. 15, 1949.

*5 Sheets-Sheet 3 Filed Nov. 27, 1945 arffio&ariaan alflllflll! in Feb. 15, 1949. c. J. ROBERTSON 2,4 1,924

IMPACT TYPE LOG :EELER s Sheets-Shed; 4

Filed Nov. 27, 1945- '-i Ccffioiar 2307:

Feb. 15, 1949.

, c. J. ROBERTSON IMPACT TYPE LOG PEELER 5 Sheets-Sheet 5 Filed NOV. 27, 1945 fJfZoZerZaon Patented Feb. 15, 1 949 PAYEE? 4 Claims.

This invention relates to a means for removing the bark from logs.

An object of this invention is to provide apparatus for debarking logs which will cleanly remove the bark irrespective of irregularities in the surface of the log and which will automatically move the log endwise as the bark is removed Another object of this invention is to provide a bark removing machine wherein the bark is removed by impact of rotatably mounted flexible members which will initially soften and pulverize the bark and will then remove the bark from the log.

A further object of this invention is to provide an improved method of removing bark wherein the log is subjected to a whipping action caused by rotary flexible members, the whipping action also effecting rotation of the log and endwise movement thereof, the endwise movement being controllable so that the bared surface of the log will not be injured by the debarking'members.

A further'object of this invention is to provide a device of this kind which will debark logs of various sizes without change in the structure.

To the foregoing objects, and others which may;

hereinafter appear, the invention consists of 'the novel construction, combination and arrangement of parts, as will be more specifically referred to and illustrated in the accompanying drawings, but it is to be understood that changes, variations and modifications may be resorted to which fall within the scope of the, invention as claimed.

In the drawings:

Figure 1 is a detail end elevation partly in section of a log peeling or debarking machine constructed according to an embodiment of this invention,

Figure 2 is a detail side elevation of the machine,

Figure 3 is a sectional view taken on the line- Figure 9 is a fragmentary sectional view taken on the line 9-9 of Figure 1, c

Figure 10 is a fragmentary sectional view taken I on the line ill-JG of Figure 1, and

Figure 11 is a fragmentary sectional view showing the mounting for one of the whipping chains.

Referring to the drawings, the numeral l5 designates generally a base structure which includes parallel base beams l6 and transverse end beams l1 and It. The base is has extending thereabove a plurality of elongated combined log supporting and log feeding-bars I9. The bars l9 are pivotally mounted, as at 20, on angle shaped members 2!, which are secured to the longitudinal beam members i6 and these feeding and supporting bars it are formed between the end thereof with a keen edge 22 which, as shown in Figure 6, is adapted to cut into the outer surface of a log L. The bars l9 are pivotally secured at their upper or inner ends to an angle shaped ridge bar 23, as indicated at 2%. The ridge bar 23 also has pivotally secured thereto the upper ends of upwardly and inwardly inclined supporting bars 25, as indicated at 36.

The supporting bars 25 are pivotally secured, as at 27, at their lower ends to angle members 28 secured to the opposite longitudinal beam mem- 'berslfi. The feeding bars is are upwardly and inwardly inclined, as shown in Figures 1 and 3, and form a substantially triangular space within which a whipping drum 29 is rotatably mounted. The drum 29 includes a cylindrical side wall 3t) and end walls 3i, which are secured to a drum shaft 32. The shaft 32 is rotatably carried by bearings 33 which are disposed above the end frame or base members I! and I8, preferably being supported on upper transverse channel members 34. A drive pulley 35 (see Figure 2) is secured to the rear end of the shaft 32 and is adapted to be connected by a belt or other suitable driving means to a power source whereby the drum .29 may be rotated at the desired speed.

The drum 29 has mounted on the outer surface thereof a plurality of circumferentially spaced apart chains or whipping members 36. The chains 36 are secured at each end to outwardly extenda ing ears 37 which are carried by the side wall 30 of the drum and a pin 38 extends through the 5 end link of each chain 36 and engages through the ears 31. The chain 36 forms a loop which upon rapid rotation of the drum 29 is adapted to" swing. straight outwardly and to thereby eneage the bark which is on the outer surface of the log L supported on the feeding bars l9. 1 v The sidewall 30 of the drum is formed with an elongated opening 39 adjacent each chain '36 so that the chain may engage within the drum parbetween a pair of' ears 42 which are fixed to the outer side of the drum. The drum is also formed with an opening 43 adjacent each short chain 40 so that the end of this chain 40 may drop interiorly of the drum when the latter is stationary as shown in Figure 3. The feeding and supporting bars l8 have fixed thereto

spacedapart upr18ht bars

44 and 45. The bars 44 are at the lower end portions of the feeding bars I! and have secured thereto a plate 48 forming the lower wall of a support for the log when the latter engages on the feeding bars l8.

The bars 44 have secured to one side thereof bracket members 41 having slotted ears 48 through which bolts 49 loosely engage. The bolts 48, as shown in Figure 7, engage, through the elongated slots 50 of the lugs 48. As will be hereinafter described, the feeding bars I8 and the bars 44 may be adjusted so as to provide for adjustment of the feeding speed of the log as the latter is rotated by contact therewith by the whipping chains 36 and 40. The upper bars 48 have secured thereto an upper plate or wall 8|, the bars 45 having secured thereto bracket members 82 similar to the bracket members 41. A closure plate "extends over the upper edges of the walls 48 and II being hingedly mounted as at 84 to the lower wall 48 and latched against the upper wall 8| by latching members 55. The top wall I3 is shorter in length than the lengths of the lower and upper walls, as shown in Figure 2, socas to facilitate the placement of a log between the upper and lower walls and on the feeding bars IS. The cover" has formed therewith aplurality of louvers 88 which open forwardly so that any chips or dust generated within the housing formed by-the walls 48, 8| and 53 will be directed rearwardly. A grooved wheel 81 mounted on a shaft is journalled in bearings 59 carried by the forward end of the frame structure in a position whereby the log L will engage the wheel or roller 51 as it leaves the housing so that the log freely moves endwise from the open forward end of the housing.

In order to provide for adjustment of the feeding bars 19, I have provided an upwardly extending lug -80 which is carried by the rear end of the ridge bar 23. A link H is pivotally connected at one end to the lug or ear extending rearwardly therefrom and pivotally secured to the' upper end of an arm or lever 82. The arm or lever 82 is secured to a shaft 83 journalled in bearings 84 carried by an upright rear frame 88. The shaft 63 also has secured thereto an arm or lever 88 disposed at substantially right angles to the arm 82. The upper end of a link 81 is pivotally secured to the rear end of the lever 88 and the lower end of the link 81 is pivotally secured to an adjusting lever 88 pivotally carried, as at 89, on the rear side of a transverse frame beam 10 forming part of the upright frame 8!. As shown in Figure 10 the ad- Justing lever 88 is formed with a tooth 10' engageable with a selected tooth of a vertically disposed rack 'II which is fixedly carried by the lower end portion of the upright frame 85. The

lever 88 may be adjusted by moving this member outwardly so as to release the tooth 10' from a selected tooth of the rack II and then permitthe free ends of the clevis l8 engaging in annular recesses I8 formed in the inner sides of the clevis so that the free ends of the clevis will not be bent inwardlytoward each other under any rotating or whipping strain to which the chain may be subjected. A spring 18 is interposed between'the rear end of the ridge bar 23 and upright so as to constantly urge 'bar 23 forwardly and thereby increasing the feeding angle of bars I8.

In the use and operation of this machine the 108 may initially be partly extended into the rear end of the housing formed by the upper and lower plates or walls 48 and 5|. The feeding members I9 may be angularly adjusted so that they will be inclined to the vertical to the desired degree and as shown in Figure 2, the ridge member 23 has a spring 18 bearing against the rear end thereof. the opposite end of the spring I6 bearing against the inner side of the frame 85. The drum 29 is then rotated at a fairly rapid rate so that the chains 38 and 40 will be centrifugally forced outwardly and will contact with the outer surface of the log between the feeding bars l9. As these debarking chains whip against the bark the bark will be pulverized and thrown from the log and at the same time the log will be given rotary movement. As the feeding bars iii are inclined to the vertical toward the forward end of the apparatus, the log will screw its way forward as it rotates due to the cutting upper edges of the feeding bars which bite into the bark and also bite into the outer surface of the log after the bark has been removed therefrom. It will be understood that these feeding members l9 also provide for cutting of the bark in spiral form as the log is rotated, thereby providing for the' removal of the bark in elongated sections or pieces after the bark has been pounded and preventing unduly long strips from being thrown from the log.

The exact configuration illustrated is regarded as the optimum, but some of the desirable results inherent in this disclosure may be obtained by various slight modifications including some d'eparture from the exact configuration shown,,and it is therefore requested that the scope of the invention shown be regarded as limited only by the terms of the claims.

What I claim is: I

1. Amachine for removing the bark from rotating, horizontally positioned and axially advancing logs comprising a base, a plurality of spaced inverted V-shaped log supporting and log feeding members pivotally connected to said base and located at one side of a log being debarked. each inverted V-shaped member lying in a, tilted plane which is intersected by the longitudinal axis of the log and which is tilted about an axis containing said pivotal connection and in the direction the log advances. one leg of each inverted V-shaped member being engageable with the periphery of said log to axially feed said log, means mounted on said legsto retain the log in contact therewith; a rotatable member mounted on said base and positioned beneath said inverted V-shaped members and within the angle formed thereby, flexible debarking members mounted on said rotatable member and swingable between to move said elongated member in the direction of its longitudinal axis, thereby to vary the tilt of each inverted V-shaped member and consequent- 1y to vary the speed at which said log advances while being rotated by impacts from said debarking members.

2. A debarking machine as set forth in claim 1 wherein the upper edge of said one leg member is formed with a keen edge for biting intothe bark of the log.

3. A debarking machine as set forth in claim 1 including a grooved roller rotatably carried by said base at the forward end thereof for guiding the log as it leaves said V-shaped members.

4. A debarking machine as set forth in claim 1 wherein said rotatable member comprises a drum formed with openings adjacent said flexible members whereby said flexible members may rebound into the interior of said drum.

CHARLES J. ROBERTSON.

REFERENCES CITED The following references are of record in the file of this patent:

5 UNITED STATES PATENTS Number Name Date 1,017,655 Drake Feb. 20, 1912 1,552,498 Noyes Sept. 8, 1925 0 1,670,723 Hummel May 22, 1928 1,951,084 Council Mar. 13, 1934 1,953,194 Sharkey Apr. 3, 1934 2,025,337 Camden Dec. 24, 1935 2,055,108 Hokonson Sept. 22, 1936 15 2,305,281 Taylor Dec. 15, 1942 2,436,555 Daniell Feb. 24, 1948 v FOREIGN PATENTS Number Country Date 20 69,348 Sweden Sept. 22, 1928