US1765987A - Machine for sawing timbers - Google Patents

Description

June 24, 1930.

G. s.' MARION MACHINE FOR SAWING TIIIBERS Filed July 25. 1927 s sheets-sheet i June 24, 1930.

G. S. MARION MACHINE FOR SAWIiG TIIIIIBERS Filed ,July '23, 192'?- s sneets-sn'eet 2 June 24,1930.

a. s. MARION MACHINE FOR SAWING TIMBERS 6 Sheets-Sheet 3 Filed July 25, 1927 June 24, 1930. G,' s, ARION I 1,765357 IACHINE FORJSAWING TIIBERS Filed July 23. 1927 6 Shasta-Sheet 4 June 24, 1930. G ARION 1,765,987

MACHINE FOR SAWING TIMBERS Filed July 2s.- 1927 6 Sheets-Sheet 5 June 24, I930. G. s. MARION MACHINE FOR SAWING TIMBERS Filed July 23, 1927 6 SheetS-Sheet 6 Patented June 24, 1 930 fr 7 i GARDNER'S. MARION, or ooiveo en, MASSACHUSETTS, ASSIGNORTO Portia com-Ln COMPANY, or CHELSEA,"IiIAfiSACHUSETTS; A; C.ORPOBATIQ N OF MASSACHUSETTS lIYILA GHI N'E roe SAWrZNG winn ng Application ,fi1ea July 23,

' Thepresent invention" relates to'machines for sawing timbers and is herein disclosed as embodied in a machine for sawing roof rafters.

' One object of the invention istto produce a machine Which will operate automatically to saw timbers accurately, rapidly, and efli- 'ciently. to any, one ofa large variety; of shapes an'dsizes as required for building 110 and similar purposes, More specifically its object is to produce a machine for" sawing roof rafters which willfoperate automatically toycut the endsfof andi notches in raft ers in rapid successionand" in exact duplig .115 cation to fit accuratelyf withoutflfurther alteration into the b g. Scheme for which they-aredesig d 1 I I r r V v of the invention consist in the devices, com- .20 binations and arrangement of parts hereinafter describedandclaimed.

,The several features "o'fthe invention togetherwith the advantages gtobe "obtained v thereby will be clearly understood by those 5,2 skilled in theartfron-if the-following de-J.

seription taken in a connection the accompanying drawings, in which Flg. 1 1s a view in front elevation of one embodiment of the invention in a machine for sawing 1,30 roof rafters; Fig.j2'is aviewl in transverse verticalsection on the line"2j2'of Fig. 3 Fig. 3 is "apl-an view of the machine Fig; lis an enlarged View in vertical section of aportion of one of"- the'endless chains and the 35 work clamps attached thereto 'comprising the travelling work support, takenEon the.

line of Fig. '3 at the receiving end of the' 'work' support; Fig-1,1515: a similar'vlew showing the work" clamp discharging the- .49 finished rafter 'atthe rear' end o f -the ma- Fig; 6 i's a detailed;- view in front elevation offthe'partsshown {in Fig. 4:; 7 is' a I l detailed view in front elevation ofgthe rotary 4? saw for cutting the upper ends ofthe rafters planview' of -the parts shown Fig. 7 p.50 Fig'ilO is a rear elevation iofjthe saws for 1927. Serial No, 207,886."

notching and cutting'the lower ends of] the rafters,together with their mountings; Fig.

11 is a-vieW of. one ofthe rotary saws with its mounting for cutting the lower rends of the rafters, the View being taken along the axis of thebearing from the rear; Fig. 12 V 1s a- ,slmilar view of thebearings for the rotary .saw cutting the side of the notch parallelto the ends of the rafter; and Fig.

13 is a perspective view of a finished rafter fqb and also the angular notch near the eaves I end of the rafter to receive the plate or other With these objects. in'view the features Support 'fo rthe rafter. The machine cornprises a travelling worksupport and four rotary saws adjustably mountedto cut the ends of and notch the rafters at the desired 1 r angles and distances as'the raftersare' fed past the saws." The travelling Work support. consistsof two endless chains adapted to feeding the work to the saws, runways are provided which hold the clamps jrigidlyin the line of feed while therafters are being fed to the saws; "I

" Referring more specifically to the drawings, the" machine comprisesa-broad rec- 1 t ngulair frame 14, consisting of two front; 'members' 15, one rear member l6, andltwo i end members 17. 1011' the frame are lillQllnt v ed two parallelendless chains18 andY19 for feed ngithe timbers across the top of the j machinezpast the saws. The chains run on .icllerfspro'cket wheels 20 and are "driven at the same rate of speed'from the'd-riving shaft I i 22 atthe rear of the machine through sprock et1whe els23 and 25 mounted onthe driving shaft; v -Afrotary saw 24 for cutting the h lower ends of'the rafters and 'therotary saws f 25: j a and also facilitates the castingof ofthe lin-,

. .ished rafterat the end of the eperation; T f the rear end of the'basev '40 is secured *braclietA6 which carries two rollers A8 30 jWhile feedi theY-ehain, the c ontact of ,the' rollers f p lg'tvithithe guid'etvaysifir 'To soinefextent thejvork gicarrier i is also held rigidly p07. sition -by the contact ofthe'rolls 58jof'.tlie

t. elainping' leversfO withftheiguidewvays 38 26 28 adapted to notch the rafters to 7' receive the Wall plate of the house area-ll adjustably mounted on brackets Whichare sleeved to a fixed'sup'port 30, formed in the machine frame. A siniilar saWBQ isprovided for cutting the upper ends of the rafters this saw and-also the endless chain 18 being mounted on acarriage 34C foradjustment transversely to the'line'of feed-to determine 'the length of rafteritobecutj 1 Thetimbers are-securely held in position:

on edge as they are fpresented to the saws by 11163118 of Work carriers 36 Which arefastened at correspondingfintervals to the. [chains 18 and 19. "To further insure the "requisite degree of accuracy. in feeding the Work, guideways 38 are mounted on both sides of: the chains so that the carriers are ,t rigidly positioned in the line of feed as; the

V v v t IThe Work carr ers compr sea base -10.

which isfastened. atlZ to the chaln "and: a

{back'support {t lilsecurejd at right angles 130 Work is fed past-the saws. I r

the base. The front "end" of: the b ase" is bent down so that'it is supported on-tlie chain adapted/to ride in the guideways -8 na serves, as a'pivot for the parallel clai' 'iping l levers 50,; Theinovable jaw of the clamp r r by vvhichth'e work issecurelyheld on edge in thefcarrier comprises a block 52 which is and carries axspring pressed} plunger iac'lapted to engage the timber. 'lworods 55 secured tothe enlarged head ofthe plunger I 5 1 land adapted to slide in corresponding I plunger with relation to the block 52 and the' sharpened' lower ends extending beloW fthe face pf the plunger prevent any slipping of the material held in. the clamp. Two

the guide'ways 38-.l The clamping jaWsof the carrierimay beadjusted to accommodate materially larger t mber wh ch could not be'talren'care of by the yield in the spring zpressed V-plunger 54% by securing the block 52 to the li'nlrs'fi through the eyelets 59 formed in theflen'ds ofjthe linksfCr this'fpurposei spring tlO'stret'ched between the block and i' '7 l a point on thevertical back support i l tends gto 'hOld the block depressediiii clamping .p'o-

'sitiorL p 7 f-lumber to V the-sans the worki carrier is supported. at one pointby tact with, the V rafter placed in the buniper,

slidably mountedfon the backsupporte holes in the'lblock '52V serveht0, guidethe parallelilinks 56 connectthe bleclr52 tethet ,7 clamping levers 50 which carryfon their; 7 other sends the rolls-58 adaptecl to engage in since the parts of the clamp when in clamping position With a rafter in the jawsof the clamp tend to support each other and prevent forward or backward movement of the clamp, The chain is held taut to form a firm support for the clamp by placing the e driving sprocket Wheel at the end of its ork feeding travel at the rear end of the machine and further by theuseof tensioning-devices of ordinary construction; on the l lower or} slack side of the chain. The timbers-are automatically 'fed to the machine ",froma bumper or receptacle formed on the front ,of the machmewhmh f comprisesjtwjo curved bands 62 mounted on the machine frame each vbeing provided with a -verticalback rest 64 to position the rafters placed inthebuinper iwith relation to the V J clamping devices. To further assistinposi- -tioning the rafters anend plate 66'is provided for the bumpersecuredfonthe ma'chine T V frame. a 7

Just before the Work carriers mounted on theendlesschains l8 and 19 come lnto coni the rear ends ofthe clamping levers 50 are depressed to openthe' clamping jaws by means of springs,;68 which are mounted on a fixed bracket and adapted to 1 come into eontact with the rolls.-

As the clamping devices V V 7,95 are carr edover the sprocketwheels onto 7 j a horizontal plane therollsilz8fland 58 Willi engage inthe guideWa-ys 38causingtheblock.

52 tobe. depressed to clamp the rafter firmly 100:,

on the Work carriere As 'the carrierspass over the sprocket heels'j23, and Qlfi fatthe rearofthe machinetheitipping of the clamp} if Willcause the clampingglevers =again to be depressed relatively totheclarnpto release v I "The rotary saw; for cutting the lower7 ends ofthe raftersis'adjustably moiintedon i V thejiinished rafter as illustrated in Fig. 5

a bracket 72fto cutthe lower ends ,of I the rafters'at the desired anglewhic-hwillcorrei spend to the 'pitehof'the roof and ill be"; parallel to the} cuts made-"by the saws 28 and 32. Thesaw 2'is mountedona shaft '74 w i h n rb a g -76, timomiteciror adjustment lengthwise of theishaftgin'bloclrs i =78 Wlnehare -initurn mounted for adjust-J ment. transversely eftheshaft in ajvertical angular adjustment O, hels ilvr with relation tiQlL bygme'ansgof set screw; 80; "An*afddi+ plane-by means of bolt and slot connections "w th thebracketjZQ. .The bracket 72I'is sleeved on the fixed support 30 to permit i Q t 12c tojthe workla'nd is-held adjustablyin-posif the fixed support 30and'held adjustably in the desired angular position by means of set screws 90 and 92. I Q I The rotary saws 24, 26 and 28} are' all driven from the driving shaft 94 by 'a' belt 96 which runs on a pulley 98; on the driving saw. shaft 74 bya belt 102' running on pulleys 104 and 106, and the saw 26 is similarly I bracket 116 is further supported by means is driven from thedriving shalt 94 by a 1 1 menttransversely to the line of feed comdriven from the shaft of saw 28 by a belt The rotary saw 32 for'cutting the upperv ends of the rafters is similarly mounted for adjustment illustrated as in Figs. 7 and 9 to cut the rafters, at the exact-angle required to fit into the building scheme -forlwhich they are designed.' The rotary saw is mounted on a shaft 11O1which'turns in bearings 112 one at each end of theshaft the bearings being mounted for adjustment lengthwise of the shaft. in blocks 114, and the blocks being in turn mounted for adjustment transversely of the shaft in a vertical plane by means of bolt and slot connections with the bracket 1164 In order to secure the desired 118 mounted on. the carriage 34 andis held adjustably in position by a set screw. The

of a rod 120 hinged on the carriage 34 and two nuts 122 and 124 threaded onto the rod to bear against thebracket 116.; The saw belt 123 which runs one pulley 125splined to the driving shaftand a pulley 127 on the saw shaft 110.

Thecarri-age 34 which supports the rotary saw 32 and the endless chain 18 for adjustprises a supporting bracket'for these parts and is provided with rollers adapted to run' on guideways 126, 128 and 130 formed in L the frame of. the machine. The carriage may're'adily be moved to adjust the saw 32 other end apinion 136 which engages a sprocketchain138 f a stenedto the frame ofv the machine.

h To glock. the1carria ge34 adjusted I position, a handilever 14O1ispivoted'at 142 I tothe carriage andv connected'by means of links 144 and 146 to two small rollers 148 i and 150 so thatwhen the hand lever 140 ismoved to the rig'ht the rollers will be drawn together, riding under oppositely 1I1Cl111l portions of the carriage. 34 to;l1ft '1t off the guideway. Atthesame-"time, hook shaped brake member 154 secured; to the carriage will be brought into contact with the -flanged under sides of the .guidewaysto lock the carriage. in position. Thedriving sprocket wheel23 of the endless chain 18 is: splined sides with supporting bearings 152 for the A p drivingshaft which are secured-to the carshaft anda pulley on. the shaft 7 4 of saw 24. The saw 28 is in turndriven from the.

riage" 34. When adjusting the. position of the carriage the driving pulley for the saw 32 and the adjacent supporting bearing 156 which is adjustably secured by afboltf I andslot connection l58'in the machine frame adjusted "position of the carriage.

The operation of the machine 1s"as"fol lows: Two corresponding work carriers rid g "on the endless'cha1ns18 and 19 will havetheir.clamping jaws opened by the cone tact of the cam surface 68 with-the clamp- -must be moved along and again secured in 7 position at a point'c'orresponding with the mg levers .50 as they approach the loading bumper to rece ve an uncut rafter ,placed the influence of the springs 68', permitting the jaws to contact with the-rafter under the influencelof the light spring 6O. Then as the carriers pass "around the sprocket '3 wheels 20 onto a horizontal plane, the rollers '48 and 58. entering'the guidewayswill p0- sition "the carriers rigidly inthe-line of feed and actingthrough the clamping levers will depress the clamping jaws still further to takeflupthe yield inf-the spring pressedplunger 54 so that the'rafteris held rigidly positionedinthe carrier." The rafter is now carried past the saws which are adjusted first to cut simultaneously the ends of the 5 1 timber at the desired angle and then to make firstione and'then the other cutof the'notch.

Preferably the saws and carriers are so arranged and spaced that in regular operatlon of the machine, two saws Wlll always be cutting i first the end cutting saws on the; same rafter, and then the notching saws on v I 7 Thus a steady and uniform load is provided, enabling the machine different rafters.

to operate with a minimum of power and at maximum speed. As the carriers-ride over theQdriving sprocket wheels atj the. rear of the machine,the clamps are opened permitting the finished rafters toslide'off onto. a

chute or other appropriate receptacle while the carriers return to repeat the cycle.

iio v 'Although theinvention is herein disclosed 1 i as embodied in a machine for sawingroof rafters, certain features of the invention-are i of more general application to machines for "'automaticaly sawing any relatively J heavy and unwieldy timbers to fitwithout. H :furtlier alteration'into the building schemes for'wliichthey are "intended. The ork is handledea'sily, rapidly, and with a degree 5 of accuracy not obtainable by present meth One embodimentofthe invention ina machine for sawing roof rafters having been described and illustrated; What is claimed is: l v 1, Ainacliine forsawingroof rafters hairing, incon bination, rotary saws for shaping Y the lower ends and noteliing the rafters, a saw for shaping the upper ends of'theraffers, a continuously travelling workvsupport for feeding the rafters horizontally at spacedinteryalgfla carriage for the -latier [saw adjustable to determine the length of e e the rafters, and lneansrforclamping the car; r g' ri y in" pQe t qn' somp ns e i r clined face ongthe carriage andcooperatmg 'rolls for engaging the same. i V

'2. v A machine for sawing roof rafters having, in combination; a continuously traveljling WOIk suppert' fo'r feeding the rafters V j hor zontally, tlpp ng mountlngs, rotary saws carried thereby to cut, the lower ends and notch the rafters at theldesired angle, means I for adjusting the saws on the mountings 25 lengthwise of at rightsangles to their 7 ,respectlve axes, andjefn additional sawqad justably"lnountedto cut the upper ends of f the rafters at the desired length and angle. 1; 3'. A machine forfsawing roof rafters Q 6 haying;in combination, a eontinuously trair 1 I s e I V I e .elling Work support for 'f eedlng the rafters e 7 i f V, horizontally at spaced'intervals',three saws 5 1 spaced to operate consecutively onthe same rafter, andeonnnon means ,providing for A angular adjustments of the three saws. I e In testimony whereof have signed iny name to this specification.

GARDNER sQMARIoN,

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