US1727491A - Barking machine - Google Patents

Description

ffnpt: l0,l 1929: o; E; sT. JOHN BARKING HACK-INE Filed' Sept. is. 1927 2 Sheets-Shee W. 1. VJ m m MM m a .fll r a @M a mf, WSJ/ wm ww. [Ep/1W v.` y. w n r me d w w 3 m Sept. l0, 1929. Q, E, 5T JQHN 1,727,491

' BARKING IACKINE Filed Sept. 16, 1927 2 Sheets-Sheet 2 if/ofwel.

Patented Sept. 10, 1929.

UNITED STATES ORESTA E. ST. JOHN, OF GLOVERSVILLE, NEW YORK.

BARKING MACHINE.

Application led September 16, 1927.

The object of my invention is to provide a construction of machine especially designed to remove the bark from logs in preparing them for utilization in the making of veneers for the manufacture of baskets, wood pulp and materials for other purposes.

Heretofore, it has been customary to manually remove the bark from logs by use of a suitable cutting tool, such as an adz, for eX- ample. A method of this character is slow and costly and unless considerable care and skill is given to the operation, the results are not satisfactory and are more or less wasteful.

My improved barking machine is so constructed that the logs are supported and rotated and during such rotation treated to the action of a revolving barking cutter which removes the bark and, at the same time, re-

duces the outer surface to a more or less cylindrical form, and moreover is so constructed that the barking cutter may be moved out of the way of the finished log and the supporting means therefor may also be moved out of sustaining position to permit the log to roll downward by gravity for transference to the veneer cutting or other machine for subsequent treatment. The log supporting means is thereafter again adjusted int-o posiso tion, a new log rolled down in contact therewith, and the barking cutter again brought into action, all of which is performed in a rapid manner and with accurate results whereby all of the logs are treated to substantially the same barking operation.

My invention, therefore, comprehends and includes mechanical organized means cooperating for carrying out the aforesaid operations.

4o My invention also includes various details of construction which are fully described hereinafter and which, together with the features above enumerated, are more fully defined in the claims.

4 5 My invention will be better understood by reference to the drawings, in which: Fig. 1 is a side elevation of my improved barking machine; Fig. 2 is a plan view of the same; Fig. 3 is a vertical section of a portion of the machine, taken on line 3 3 of Fig. 1; and

Serial No. 219,853.

Fig. 4 is a perspective view of a portion of the barking cutter sustaining means.

2 is the main frame and may be constructed 1n any convenient form. At or near its middle portion, it is provided with a `transverse shaft 3 supported in bearings 4and provided with a sprocket wheel 34 by which it is rotated under the power derived from a sprocket chain 33. This shaft is also provided with two sprocket wheels 5, 5, conveniently spaced apart somewhatless than the length of the logs 18 to be barked and respectively combined with obliquely arranged driven endless chains 6, 6, the other or forward looped ends of which` are guided about sprocket wheels 8, 8, secured to a shaft 9 which is loosely journaled in the bearings 10, 10, on the forward portion of the main frame 2. These chains 6, 6, are provided with teeth 7 for engaging the under portion of the log `70 l18 and causing it to be rotated during the' barking operation to be later described.

Somewhat in advance of the shaft 9 is a transverse rock shaft 11 which is journaled in bearings 12, 12, on the main frame 2 and 75 is provided with arms 13, 13, which consti` tute rests or supports for the log during the time of its being positioned preliminary to and during the act of being barked. The end of the rock shaft-9 is provided with a gear segment 15 which is actuated by a worm 14 having a shaft 16 and hand wheel 17. By rotating the hand wheel` 17 one way or the other, rock shaft 11 and the rests or supports 13, 13, carried thereon may be adjusted for sustaining the log 18 in the desired position with respect to the barking cutter 23 and which may also control the extent of depth and speed of barking. As indicated in Fig. 1, the rest or support 13 is 90 adjusted slightly away fromthe log so as to let the latter press upon the revolving cutter 23, and it will be understood that more or less adjustment of the said rest or support is desirable to prevent too heavy cutting of the log per revolution of the cutter and, at the same time, to keep the movenient of the log toward the cutter under control to prevent waste of material by too deep cutting. ln this way, the depth of the permitit to be discharged under its; own` weight. After discharging the barked log, the rests or supports are again raised to the normal position shown to receive and sus tain another log to be barked.

The frame 19 is hinged upon transverse studs 20, 20",. carried uponthe upper portion of themain frame 2 so as to have capacity to oscillate. The forward portion of the pivoted frame 19 is provided with journal bearings22, 22., in which is jgournal'ed the rotating cutter spindle 21 upon which are threaded the milling cutters 23a and by which they are operated as av cylindrical barking cutter 23,. the cutting teeth of which are preferably arranged1 in alinement parallel to the axis ofthe spindleand whereby they mill er cut the' bark of the log away to the desired depth to` give, it a clean surface of cylindrical fornr., This barking cutter 23 is positively `driven at a high speed by a sprocketl drive chain 25 and sprocket wheel 24; on ,the spindle shaft 21.y v

- Referring to Fig.. 1, the barking cutter 23 runs anti-clockwise as do, also the sprocket chains 6,5 6 which rotate the4 log during the barking operation thereonby the barking cutter. It will be observed, however, that the barking cutter is rotated at ai .much greater speed than are the chains 6,6, so as toinsure a ysmoother and better finish to the. surface ofthe barked loe. j

The pivoted frame 1,9 has upon its rear portion the. electric motor 30, the. weight of which, augmented with addi-tional weights placed in the box 351y provides more or less counter-balancing of the forward portion of the frame andbar'king cutter 23.' Thel motor is provided with a sprocket wheel 3.1 on

. the end of its shaft and said; sprocket wheel drives a sprocket chain-'29 which, in turn, drives a sprocket wheet 28 (Fig. 3). The

. sprocket wheel 28, isconnected with sprocket wheels 2.7 and 32, the former operatingv the barking cutter through chain 275` andi the lratter operating the feeding chains 6, 6,

i. through shaft 23, sprocket wheel 34 and chain 33. wheels, the speeds of the: operative parts may By proportioning the sprocket be j modified as desired In operation, the` barking cutter 23 should have capacity to be adjusted` down in. front ofthe log asin 1l, but heldv against contacting with the restsor supports 13, and to secure these resultsr I provide adjustable abutments 33, 38, inthe form of screws carried on the main frame2 and upon which the arnis of the pivoted frame 19 rest. The capacity for adjustment above noted would be for logs of a greater diameter. Any other means for adjustment may be provided for in lieu of that shown.

To facilitate the raising and lowering of the pivoted frame 19 and the barking cutter 23 thereof, the forwardly projecting portieiisfef said frame-may be provided with handle portions 26 extending forward of the frame and cutter, said handles providing convenient means ata distance from the cutter wliereat the lifting force may be applied and thus `not only insuring protection against injury by the cutter, but also somewhat increasing theleverage and hence the effective power in lifting the frame 19 and the cutter.

In the organisation of parts shown, the log 13 is driven clockwise by the action of the chains 6 whereas the barking cutter 23 is revolved anti-clockwise which insures the cutter clearing itself from the barked particles during the cutting operation, but I donut restrict myself to this particular rotati-o lof the log and cutter.

l 1While the logs may be fed forward upon the chains C any convenient manner,l I prefer to provide immediately to the rear of the shaft 3 a table or support 36 upon which logs to be barked may be positioned preliminary to their being fed into barking position. 'lhis table may be provided with end guides 37, 3i, by which the logs may be centralized relatively to the chains 6, 6, which are ultimately to receive them. The sprocket wheels 2i', 23,` 32, shown more clearly in. Figs.. 2 and 3,. lare connected together by a sleeve which revolves upon the stud 2O and. constitutes, asl it were, a counter-shaft 4between the motor 30 and the driven. shafts 3- and l2,1, and while the said shafts are Vdriven from. the same motor, the diameters o f the sprocket wheels in the power transmitting means .are so proportioned that the speed shaft 3 together with the chains 6, 6,: will be relatively slowed down while thev shaft 21. and the cutter 23 thereon will be speeded up relatively to the speed of the motor.

lllhile I have employed the short studs 20 upon which the pivoted frame 19 is supported. instead of using a continuous shaft,

in practice to give satisfactory and reliable results, it is to be understood that I do not restrict myself to the details, as the same are susceptible of modification in various particulars with-out departing from the spirit or scope of the invention.

Having now described my invention, what I claim and desire to secure by Letters Patent is:

l. In a machine of the character stated, the combination of a support to sustain a log while permitting it to rotate, a pair of endless chains for operating upon the log to cause the same to rotate in relation to its support, a revolving barking cutter arranged above the supporting means for removing the bark from the log having a cutting length equal to the length of the log to be barked, adjustable supporting means for moving the barking cutter into and out of cutting positions simultanenously along thewhole length of the log, and power means for operating the barking cutter and also the endless chains for rotating the log.

2. The invention according to claim l, wherein further, devices are provided for moving' the log sustaining support out of sustaining position to permit the log to discharge itself by gravity from the rotating chains and said log sustaining support.

3. The invention according to claim 1, wherein further, means are provided for a relative adjustment between the barking cutter and the log support whereby the log may be caused to normally press against the cutter and be held thereby out of interference with the support until the proper amount of bark has been removed when the support will then stop the feeding of the log to the cutter.

1l. The invention according to claim l, wherein further, the log support is adjustable and means are provided for adjusting the support relatively to the barking cutter whereby the log may be sustained in different operative positions relatively to the cutter for controlling the depth of the barking produced.

5. The invention according to claim l, wherein further, means are provided for moving the log support into and out of sustaining position whereby the log is sustained by the cutter until the barking opera-tion is completed and the log rests against the support and thereafter upon the removal of the cutter from cutting position the support is moved out of sustaining position to permit the finished log to discharge itself by gravity.

6. In a machine of the character stated, the combination of a main frame, two transverse shafts journaled therein and one of which is lower than the other sprocket wheels upon said shafts, endless sprocket chains about said sprocket wheel and connecting the shafts into operative relation said chains extending in an oblique direction and operating to rotate the log to be treated, a pivoted frame hinged to the upper part of the main frame, a barking cutter journaled in said hinged frame whereby it may be raised and lowered by adjustment of said frame, power means on the hinged frame, and power transmitting means therefrom to oneof the sprocket wheel shafts journaled in the main frame for operating the sprocket chains driven thereby and also for rotating the barking cutter while permitting its adjustment relatively to or from the sprocket chains, and supporting means for a log to be barked arranged between the barking cutter and the obliquely arranged sprocket chains.

7. The invention according to claim 6, wherein further, the supporting means for the log comprise a transverse rockshaft having upwardly extending arms secured thereto, and mechanical means for rocking the rockshaft for adjusting the supporting arms in and out of supporting position.

8. The invention according to claim 6, wherein further, the pivoted frame is more or less counter-balanced by having the power means arranged on the pivoted frame to the opposite side of the pivot thereof to that in which the barking cutter is journaled.

In testimony of which invention, I hereunto set my hand.

@RESTA E. ST. JOHN.

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