US2480889A

US2480889A - Hydraulic barker

Info

Publication number: US2480889A
Application number: US710299A
Authority: US
Inventors: Frank H Swift
Original assignee: Crown Zellerbach Corp
Current assignee: James River Corp of Nevada
Priority date: 1946-11-16
Filing date: 1946-11-16
Publication date: 1949-09-06
Anticipated expiration: 1966-09-06

Description

Sept. 6, 1949.

Filed Nov. 16,

F. H. SWIFT HYDRAULIC BARKER 4 sheei's-sneet 1 FRANK H W598- ATTOR NEY F. H. SWIFT HYDRAULIC BARKER Sept. 6, 1949.

4 sheets 'sheet Filed Nov. 16, 1946 INVENTOR. FRAN K H SWIFT ATTOR NEY Sept.'6, 1949. F. H. SWIFT HYDRAULIC BARKER 4 Sheets-Sheet 3 Filed Nov. 16, 1946 m T. mm 7 VW R 3 ms H N A R F ATTORNEY Patented Sept. 6 1949 iUf-NiITEB HPSZDRAULICABARKER -lFran k H." SVvif t QPortIand, "Ofegl, assignor "t6 flllrown Zelli'baeKCorporation, San Francisco,

Calm, a eorporationof Nevada v llApplication November 16, l946fisel'ial Nor710,299

- This applieation is eai continuation 4in part -of entitled VHydraul-ie rlebarking, and the device :of =.the present ainvention .--is designed to earry v out such Inethod aml deloarking.

The-object ofthe present invention is to provide a simple .and practical machine in which .the 5 bark 'will he: removed from slabs and eants by hydraul-immeans. I V

-Another -objectzobthis einvention is to provide -a :slab eor cant zbarker which can be operated easilmandeconomieallyi insorder that thedebark- =ingof=slabs=andeants eanrbeicarried onprofitably.

--A ef-urther object of thiseinvention is to j provide a \praetica1 hydraulic barker =with -=a moving debarking nozzle do! use on longitudinally moving slabs, dn which the Jet -from the nozzle will .be 'ZOaHSQd t'O-mOVG- OVBI' theslab obliquely with :respect eto z-the line \of -movement of =the slab, so that, as a -resultantof the two directional movements, the path cut hy the debar-k- -ing jet will :be perpendicular to the -;line i of movement of the slab. Y

additional object aiS vto eprovide a hydraulic slab .barkerein wh-ieh -a epairnoihydraulie debarking nozzles can-heemployediinethesame manner -.andeontro1led by the same means.

- ther objects:v and :advantagesof -.the z invention will doe -apparent to persons vsslrilled in :the art from thevfollowing"deseription-in-which reference made tothe: aceompanying drawings :in which:

7 Fig. l-is a side elevation-of the barker;

Fig. 2 is a top plan view: Fig. -31is :anend elevation taken fromthe rleft .in Fig. :1;

Fig-4 is an end selevation "of aiT/hB'QBPOSiiIB end taken from the irightin-el ig. =1

-Figais an enlarged fnagmentaryNertieaLsec- =tionion'1the line5e5 of Fig. 2,: showing --a detail of they-means lior tilting v-the nozzle carriage "Fiend-is:a frag nentaryeside elevation, similar in part to'Eig. 1, illustrating the itiltingof "the nozzle carriage;

rigs' 'in'e. and are dia'grar'nmatie'.representations m illustrating the position and movement of the debarking nnoz'zles ean'dfthe .eorrespenamg .position ofethe --cafi1-aotua1tedt'ilting means for the nozzle --carriage -eat Hi'fie'rnt stages "in the s operating cyie;

Fig. HM-is a diagrammatic gblan of "the paths :deseribedby the ejetsefromithe .two dbaiking nozzles on aestaitionaryi-slab'; .and V 4 Fig. -11 is .a similar 1 3mm llnustrann "the :re-

sultantepaths produced on the slah When tlie -=slabv-. moves longitudinally through iihe machine.

Referring first to'figs. i to "4 inclusive, the

device isamounted onea rigid frame sti iitiire,

indicated in wgeneral?by the ii'ferehce character 1 H]. In the loiver .epart -.of the frame structure a series of-rollers i'leare journale'd, These rollers are driven in ennison "by suitable means (not shown) and 'supp ort the slabslfl and au'se the '20" slabs-etoibeinoved iong'itudinali'y' through"the deviceatr aepredetemiined rate .of speed.

- Aenozzle carriage 13 is "supported on-ithe top of the frame structure l'fl." fIhi carriage -is .hinged-orepivotaily lmOllfitd t one 'end on the transverse-rod; N. ii ll ie Tends \o'ff'the .rod I 4 are supported in bloks [5.f YThe "other end of vthe carriage 4'3, i tiiusithefight hand end as -viewed in -Iilig 1)., is supported en a pair 'df bearing blocks it KFig- -4:) Which in "turn are -supportedon .a rotatableestfib shaft H; "The 'stiib shaf t l v.rigi'dlil seiired Lin the 'e'fi'd 'of an arm =18 iFig. 11),.1the other end of which arm 'sepivotailyrconnected to an upwardly extendin carriage. I iormed with a cam groove?! (see Fig. 5). An

111; .wm enow' b a parentfremrigs.4;5 and 6'that -.rotation (if the ewh'eiiifl, dueto the engagement er the roller-'24 6f "the iiinibr *23 iii the "cam link, id iand-lthe httom (and er the link "l's has a pivotal -mountin'g ,on ith l fraine" strueture.

n wheililiiis eseciir d n' the e'nd of a snarrfil 'whieh .rotatahly mounted en the top er the lThe pe'iiriietr of "the WheelfZD'is inverted U-shaped membeez'i carries a dawn- ,wardlylextendingioller i'd at the top; which roller rides in' theeeam-groove fl and thii's ats as a'cam foilower. TheY'bottom ends of the' rhinberT23'are rigidly securedto'the stiib'haft "f1 (seeFig'fii).

groove of 'whel ili will caus 'hieiiiher'?23to r'ok back and foi'the' However; the reeling of "ineffi- ,b erii 3 -pro'duees lrdkiiig of "thestfib Shaft I tend, .l since the stub shaft T7 is rigidly "sciifd tthe a m '18 the resiiiting reliiri'g tritestub shaft Iii-and armf8 will 'caii'se 11118113 down'rrievernent this up and down tilting movement of the carriage will be explained later.

A pair of shafts 25 (Figs. 2 and 4) are rotatably mounted on the carriage l3 at the sides. A nozzle assembly 26 is supported on the end of each shaft. Each nozzle assembly includes a debarking nozzle 21 and a supply pipe section 28 extending substantially at right angles thereto. A suitable swing joint 29 connects the end of each pipe section 28 to a hose 30 and the hoses 30 in turn are connected to a pipe line through which water under suitable hydraulic pressure (for example, 1200 pounds per square inch) is supblies can swing transversely with respect to the.

carriage l3. The two assembliesare connected by a link 3| (Fig. 3) so that they will Swing in unison. In addition, one of the nozzle assemblies is connected by a rod 32 to a crank wheel 33, the rotation of which causes the two nozzles 21 to swing back and forth in a path transverse with respect to the carriage l3, as apparent from Fig. 3. The crank wheel 33 is rigidly mounted on the end of shaft 2| (Fig. 2), to the other end of which shaft 2| the wheel with the cam groove is mounted as previously described. A belt pulley 34, also mounted on shaft 2|, and driven by suitable belt means from a motor (not shown) or other source of power, produces rotation of the shaft 2| and, with it, rotation of the two

Wheels

33 and 20.

The cam groove 22 of the wheel 20, as shown in Fig. 5, and as indicated diagrammatically in pattern in Figs. 7, 8 and 9, has two identical main sections a: and a: connected by two somewhat abrupt curved sections 31 and y. From the previous description it will now be apparent that as the wheel 20 is rotated the end of the carriage [3 which is supported by the stub shaft l1 and arm l8 will be alternately raised and lowered. During each complete rotation of the wheel 20 the corresponding end of carriage l3 will be raised and lowered twice. Furthermore, due to the pattern of the cam groove 22, the corresponding end of the carriage |3will be raised slowly and then lowered more abruptly each time. This raising and lowering of the end of carriage I3, in other words, the tilting of carriage l3, causes the discharging ends of the nozzles 21 to be shifted back and forth in the direction of travel of the slab and thus in directions normal to the swinging movement imparted to the nozzle assemblies by the rotation of thewheel crank 33 previously described. Theentire carriage tilting means is so constructed and arranged that this tilting of the nozzles (as shown in Fig. 6) is approximately equal in'amount to the width of the jets discharged by the nozzles.

Since the wheel crank 33 and the cam groove wheel 20 are both secured to the same shaft 2| and thus both rotate in unison, with each'complete rotation of the Wheels each nozzle makes one complete swing transversely back and forth with respect to the direction of travel of the slab and also is tilted forwardly and backwardly twice, in the direction of slab travel, during its complete swing. The two

wheels

33 and 2|] are so positioned on their common shaft 2| that the abrupt curves of the cam groove 22 will engage the cam follower 24 when the crank pin of the crank wheel 33 is at either end of the horizontal diameter of its circular path and thus when the 4 nozzles 21 are at or near either end of their transverse swings.

The results of the operation of the crank wheel 33 and cam wheel 20, and of their cooperation, upon the directed movements of the nozzles and the debarking jets delivered from the nozzles will now be more clearly understood from the diagrams constituting Figs. 7, 8 and 9. In these figures the circles 21 indicate the nozzles, the circle 24 indicates the roller or cam follower 24, the full line arrows 35 indicate the next immediate direction in which the nozzles will move, the dotted line arrows showing the preceding direction of nozzle movement, the arrow 36 indicates the direction of rotation of the cam groove wheel 20, and the arrow 31 indicates the direction in whichthe slab l2 travels through the barker.

Referring to Figs. 7 and 8, as the roller 24 passing through section a: of the cam groove is moved to the left by the rotation of wheel 20, thus tilting the carriage upwardly, the nozzles will be tilted in the direction of travel of the slab during their transverse swing and will then move in the direction indicated by the full line arrows 35 in Fig. 7. When the roller 24' has reached the end of section a: of the groove the nozzles will have reached the positions indicated in' Fig. 8. While the roller 24 next passes through section 31 of the cam groove the nozzles will 'be-qulckly tilted back and assume the positions shown in Fig. 9. As the roller 24 is again moved to 'the left while passing through the next cam section 1: the nozzles will travel in the direction indicated by the full line arrows 35in Fig. 9, and so on.

The effect of the component directions of travel of the nozzles will be apparent from Figs. 10 and 11. First, in Fig. 10 it is assumed, for purpose of illustration, that the slab remains stationary instead of traveling longitudinally through the barker. The debarking jet from one of the nozzles, during the cycle previously described, would follow the path A, B, C, D in Fig. l0, (shown in 'full lines), and simultaneously the jet from the other nozzle would follow the corresponding path A, B, C,'D' (shown in broken lines in Fig. 10). Now, in Fig. 11, the slab I2 is assumed to be moving at the predetermined prescribed speed longitudinally through the barker. As a result of the movement of the slab, (in the direction indicated by the arrow 31 in Fig. 11), the effect of the oblique travel of the debarking jets from the nozzles is to produce paths which are normal to the line of direction of the slab travel. The tilting of the nozzle jets back and forth in the direction of slab travel is approximately equal to the width of the jets, as previously mentioned. Consequently if the slab |2 moves a distance equal to the width of the jet .path during each swing of the nozzles in either direction the debarked strips will adjoin each other as indicated in Fig. 11, the paths from the two debarking lets overlapping each other somewhat along the center line-of the slab at the inner terminus of the transverse swing of each nozzle jet.

Of course it will be apparent from Fig. 3 that that the length of the link 3| connecting the two swinging nozzles 21, the length and positioning of the rod 32, and the size of the crank wheel 33 must be made such that the debarking jets'from the nozzles will be properly spaced apart and will swing the desired distance, withtheir paths overlapping slightly at the center line of the slab surface, to cover the entire bark surface of the slabs passed through the barker. 1

seasogsse Frame -study of thedebai'king-operation it will-be apparentthat=-ifi there :were nojtipping of the nozzles, thatis-to sayg if thecarriageon which the no'zzles are supported were not-tilted during -each swing of'thenozzles-g it wouldbeimpossible jet on thesurface tosbeadebarkedtwould be always oblique in alternate directions, it would be necessary to cover the surface twice liO bGi'dB- Abarked. -'f course. the debarkingcould also beac- -complished=withoutany tippingmf the-nozzle if the longitudinal movement of the cant. .or :-slab' were intermittent and took place at the end of each nozzle stroke, but such an arrangement I consider much less desirable, besides necessitating a more complicated mechanism.

Various mechanical modifications could be made in the device which I have illustrated and described without departing from the principle or scope of my invention. It would also be possible to vary the number of nozzles employed, thus, for example, to have three nozzles swinging in unison from the carriage instead of two, in which case each nozzle would swing through a smaller angle, the paths of the nozzle jets being similar but shorter. Similarly it would be possible to employ only a single nozzle and have it swing through a sufficiently wide angle to move its jet entirely across the slab surface. But I consider the employment of two nozzles for slab barking to be the most practicable under ordinary circumstances. However, it is not my intention to restrict my invention to the particular structure and arrangement which I have described, or to limit the invention otherwise than as set forth in the claims.

I claim:

1. In a hydraulic barker, means for conveying pieces to be debarked longitudinally through the barker, a frame, a nozzle-supporting carriage on said frame, a hydraulic debarking nozzle directed against the bark surface of said pieces, said nozzle rotatably mounted on said carriage to swin in an arc transverse to the direction of travel of said pieces through the barker, rotating means on said carriage and connected to said nozzle for swinging said nozzle in alternate back and forth movements through said arc, means for tilting said carriage and therewith said nozzle in a direction corresponding to the direction of travel of said pieces during each swing of said nozzle, said tilting means including a rotating cam element mounted on said carriage, said cam element connected to and rotatin with said nozzle swinging means, a cam follower for said cam element, a member on said carriage carrying said cam follower, an arm rigidly connected with said member, and linkage connected with said arm and mounted on said frame, said cam element and said rotating nozzle swinging means so designed and arranged that the tilting of said carriage and nozzle in said direction of travel of said pieces will take place during each transverse swing of said nozzle and the return tilting in the opposite direction will occur rapidly at the conclusion of each transverse swing of said nozzle, whereby the jet from said nozzle. will travel I in oblique,sforwardeextendin lines with: respect t0 $118.4fiif60fi0l1iipfiiiiralyfilizof 7 said pieces,'for the purpose stated.

2. In ahydraulic;barken;meansafonnonveying the pieces v,to bei-debarked longitudinallydihrou the barkenla frame,.;-a,nozzlewsuppcrtingscan I riage on said frame,=.ai,pluralityiofizhyiiraulicride- --barking:. nozzles directed against; thesrbarkrsur- -faceof :saidpieces, said nozzles rotatablyamountedon said carriage to swingeimarcsitransverse to the direction 1 of traveltof;,saidmiecesrthmueh z the barker, 1 rotating. meanszon -.,said carriages-and connected :.to ..said;.-nozzl-es -for ezswin ingtzysaid nozzles in alternate vback iandrforths movements through said arcs,.imeans; for, tiltingasaidxcarriage and therewithzsaid: nozzles in a zdirectionsoorresponding to the directlonzofitravel of.-: said;pieaes, during each SWillg.:Of said nozzles,;.,saidsi;ti1tii3 means including a rotatin cam, elementtmounted on saidzcarriagassaichcam:elementiconnected to and rotating with said nozzle swinging means, a cam follower for said cam element, a member on said carriage carrying said cam follower, an arm rigidly connected with said member, and linkage connected with said arm and mounted on said frame, said cam element and said rotating nozzle swinging means so designed and arranged that the tilting of said carriage and said nozzles will take place during each transverse swing of said nozzles and the return tilting in the opposite direction will occur rapidly at the conclusion of each transverse swing of said nozzles, whereby the jets from said nozzles will travel in oblique, forward-extending lines with respect to the direction of travel of said pieces.

3. In a hydraulic barker, means for conveying the pieces to be debarked longitudinally through the barker, a frame, a nozzle-supporting carriage on said frame, said carriage being normally horizontal, a pair of hydraulic debarking nozzles directed against the bark surface of said pieces, said nozzles mounted on said carriage to swing in arcs transverse to the direction of travel of said pieces through the barker, and connected so as to swing in unison, rotating means on said carriage and connected to said nozzles for swinging said nozzles in alternate back and forth movements through said arcs, said nozzles mounted at one end of said carriage, means for raising the other end of said carriage during each swing of said nozzles, a rotating cam element mounted on said carriage in said carriage raising means, said cam element connected to and rotating with said nozzle swinging means, a cam follower for said cam element, a member on said carriage carrying said cam follower, an arm rigidly connected with said member, and linkage connected with said arm and mounted on said frame, said cam element and said rotating nozzle swinging means so designed and arranged that the raising of said other end of said carriage will take place during each transverse swing of said nozzles and the return lowering of said carriage end will occur rapidly at the conclusion of each transverse swing of said nozzles, whereby the jets from said nozzles will travel in oblique, forward-extending lines with respect to the direction of travel of said pieces.

4. A hydraulic barker of the character described including rollers for conveying the pieces to be debarked longitudinally at predetermined rate of speed through the barker, a frame, a. nozzle-supporting carriage on said frame, a pair of hydraulic debarking nozzles extending normany in a substantially vertical plane and mounted on said carriage to swing in arcs transverse to .the direction of travel of said pieces through the barker, said nozzles connected so as to swing in unison, rotating means on said carriage and connected to said nozzles for swingin said nozzles in alternate back and forth movements through said arcs, said nozzles mounted at one end of said carriage, means for .raising the other end of said carriage during arm rigidly connected with said member, and

linkage connected with said arm and mounted on said frame, said cam element and said rotating nozzle swinging means so designed and arranged that the raising of said other end of i. said carriage will take place during each transverse swing of said nozzles and the return lowering of saidv carriage end will occur rapidly at the conclusion of each transverse swing of said I nozzles, whereby the jets from said nozzles will travel in oblique, forward-extending lines with respect to the direction of travel of said pieces,

for the purpose stated.

FRANK H. SWIFT.

REFERENCES CITED The following references are of record in the file of this patent UNITED STATES PATENTS 7 Date Number Name 2,328,545 Bukowsky Sept. 7, 1943 2,342,533 Edwards Feb. 22, 1944 Swift Dec. 31, 1946