US3540498A - Multiple-cut sawing device - Google Patents

Description

I Unlted States Patent 1111 3,540, 93

[12] Inventors Eugene L. Woloveke, References Cited Pleaaan! Hill; UNITED STATES PATENTS Thmlmm PIN", 1,140,555 12/1929 Warmoth 144/133 California 2,814,319 11/1957 Hetman etal. l. 4 3l38X 12 1 pp No. 705,547 2,995,162 8/1961 Mountain 144/3x 1 Flled 14. 1968 3,080,895 3/1963 Mayo l43/36X 14$] Pate ed Nov-17,1970 2,662,563 1953 Grove 144/3ux [73] Assignee ldaeo Engineering and Equipment Co., a I

mm 0nd. company Prurtary Examiner-Andrew R. Juhasz 0M, cflum Assistant Exgmmer-James F. Coan mum. of camomh Anomey- Mellin, Moore & Weissenberger MULTIPLE-CUT SAWING DEVICE 1 Claim, 15 Drawing Figs.

52 1,5,- (I 1 3 ABSTRACT: Apparatus for making out: on a workpiece 143/3 43/47; 144/3 which includes a pair of saws pivotal about a common axis and [51' IQLCI 827! 5/00 movable into and from the workpiece to make out: therein, [50] Field Search 143/47, and nothe pa r of sa s disposed further along the workpiece and pivotal about another common axis and movable into and from the workpiece to make cuts therein.

PatentedNov. 17, 1970 I 3,540,498

Sheet 1 of.6

I INVENTORS EUGENE L. WOLOVEKE 3 BY MARVIN M. THOMPSON Mr W ATTORNEYS Patented Nov. 17, 1970 Sheet 2 016 I INVENTORS EUGENE L. WOLOVEKE F 2 BY MARVIN M. THOMPSON ATTORNEYS Patented Nov. 17, 1970 3,540,498

Sheet 5 Of 6 INVENTORS I G 3 EUGENE L. WOLOVEKE BY MARVIN M. THOMPSON W 21W F- u/ ATTORNEYS Patented Nov. 17, 1970 3,540,498

Sheet 4 Of6 INVENTORS EUGENE L. WOLOVEKE BY MARVIN M. THOMPSON ATTORNEYS Patented Nov; 17, 1970 I 3,540,498

Sheet. 5 of 6 FIG; 7

Fl G 7B INVENTORS EUGENE L. WOLOVEKE BY MARVIN M. THOMPSON ATTORNEYS Patented Nov. 11, 1970 3,540,498

Sheet 6-01 6 L, 240 258 I236 2|4 I INVHNTORS F |G ,9 EUGENE L. WOLOVEKE BY MARVIN M. THOMPSON Mf M42461! ATTORNEYS In -c' nstrueu y course, to precut certain wooden frame pieces so that they can "be'as'sembled'irito atruss easily' and conveniently. Generally, these frame piecesare relatively long, and require either a singlc'cut or a'pair ofcutson either end thereof. These cuts may va'ry'in' angle and depth from workpiece to workpiece; since "the dimensionsof thetrusses vary from house to house. Obviouisly, it 'would be highly desirable to provide a device which is Hetman et al.) fallinto the second.

MULTIPLE-CUT SAWING DEVICE BAoK ROUNDoF THE INVENTION Thisl'invention relates to a device which makes cuts in a workpiece, and more particularly to a device-which is capable of making cuts on the ends of a workpiece by movement of saws into and from the workpiece.

on of houses, and the like,-it is desirable, of

capable ofmaking either a single desired cut or a pair of desired cuts on the ends of a workpiece, meanwhile being capable of performing on' a variety of workpieces and opcrating in a most simple and efficient manner. 7 v

Devices for precuttinga workpiece. such as a piece ofwood or metal, are. of course. well known. These devices generally fall into one of two categories: cuts are made in the workpiece (l') byrri'oving' it into and from saws, or (2) by moving saws intoand from itflhe devices disclosed in U.S. Pat. Nos. 2', 684,088(Miller), 3,125,]33 (Bolenbach), and 3,030,895 (Mayo) fall into the first category, while the devices in U.S. N05. 2,917,089 (Ennis 1), 3,295,570 (O'lbri'ch),

2 9l8, 950 (LeTarte), 3,251,388 (Ennis II), and 2,8l4,3l9

Those devices which move the workpiece into the-saws have the problem of moving the workpiece so that proper cuts are made, it of course being important that the saws-actually'cut in the manner desired. Forany "consistency of cuts to be achieved from workpiece to workpiece, it is clear that means must be provided to guide the workpieces in an' accurate manner. This guiding problem is a substantial one; and. becomes even greater when the workpiece to be moved is-of relatively great length or of unusual configuration. None of 40 the devices of the type found appear to overcome this problem in an efficient manner.

Of those devices found which move the saws into the workpiece to make cuts, U.S. Pat. Nos. 2,9l7,089. (Ennis l) and one of the cuts devices is capable of making a pair of cuts on the end of a workpiece,'with the advantages attendant thereto.-

It is therefore an object of this Invention to provide a device which is capable of'making a variety of pairs of cuts one workpiece by'moving saws relative to the workpiece.

It is a further object to provide a device which iscapable of making a variety of pairs of cuts on bothends of'an'elongate. workpiece by moving saws relative to the workpiece.

It is a still further object of the invention to provide a device which, while capable of fulfilling the above objects, is simple and efficient in operation.

suMMARvor THE INVENTION Broadly stated, theapparatus for making apair of adjacent "cuts in' a workpiece held-thereby comprises a fixed saw mounted to the apparatu's'und movable into and from the workpiece. Means are'included for moving the first saw into i the workpiece, whereby a first'cut is made in the workpiece.

I of workpieces cut by the device;

piece. Means are includedfor movingthe second saw'into the workpiece, whereby a second cutis made in theavorkpiece adjacent'the first cut, the pivotalmounting-of'thesecondsaw allowing a 'variety of second cuts to bemadein the workpiece.

--Means are included for moving the-second saw from tli workpiece. e t

BRIEF DESCRIPTION orrnsbmwtnosf} These'and other objects of the inventiomwillzbecome apparent from a study of the following-ltsp ecification and drawings, in which: i

FIG. 1 isaperspective viewof-theldevicc; FIG. 2 is an end elevation of the device; FIG. 3 is a side elevation of the device; I FIG-4 is a plan view of a holding arm'ofthe device;

FIG.5 is a side elevation ofthe-deviceof FIG. 4; FIG. 6 is a plan view of the saw blade s in t'he devicc,.showing theirpivotal travel;

FIGS. 7A through 7B are plan views bin-numbeb'dtiworkpieces cut by the device: 1 I

FIG. 8 is a side elevation of aitruss 'whichutilizes number FIGI'Q is a side elevation of a mediate cutin a workpiece; I I,

FIG. I0 is a plan view of thedevicerif FIG; 19; and FIG. 11 is a: plan view of a workpiecethaving an interdcvicet'ora mak-ing' an intc r- "mediate cut thereon as made by the device-*bfFIGS 9 and I0.

DESCRIPTION or THE PREFERREDJEMBODIMENT Referring to the drawings, the sawingdevicelflisigcnernlly shown in FIG. l. The device loincludesa pair of ' parallel tracks 12 and 14 mounted on blocks 16,1830; 22A-puir of runners 24', 26 each mounted on apair'of wheels -28; 30, and 32, 34, respectively, have .fixed thereto a'substantially C- shaped member 36 made up of a baseportiorl lifi an upright portion 40, anda top portion 42. Th'c wheels 28,30, 32, 34 are disposed on and are rollable over the tracks 12,14.

A saw assembly 44 is pivotally mounted to the base portion 38 by means of a shaft 45 dispos'cd'in a sleeve46fixed to the about theaxis of pin 52. Stop means58 and 60 are mounted to base portion 38. Suitable bearings (not shownlareprovided to allow easy pivoting of the saw assembly 441.clative to the base portion 38.

The structure of the saw assembly 44 is best shown'in FIG. 2. Mounted to the shaft 45 is a U-shapedrbrackct'4fl to which a motor mount 50 is pivotally mounted-hy-mcansof-a pin 52. An

electric motor 54 is fixed-to the motor-mounted and has a saw blade 56 mounted thereon. As seen in-FIG22, the'structure allows a degree of pivoting of the motor 54'and motor mount 50 bracket 48 to limit the pivotal movement-of the motor 54 and motor mount 50. The saw blade 56 is thuspivotable from position A to position B and back againzlixed to the-bracket 48 is a casing 62disposed'about sawablad'e-56 and having a slot 64 therein to allow movement of the saw=blade56from position A to' position B, the saw blade'56 cxtending' frorn the-casing 62 when in position B. A split=ring66 is fixed relative toslccve 46 about shaft 45 and is tightenable thcrearound to fix the position of the shaft 45 in the sleeve46. The shaft4srand sleeve 46 allow pivoting of the saw assembly'i44 of l 80. Scale means 68 are fixed to the sleeve'46, whereby thedesired position of the -72 and suitable bearings are disposedirliixed'to the -end of the shaft 7.2 is 'a longitudinalguldermember 'fl having a saw ussembly 76 slidably'mounted thereon:- Suitnblc means are pro- Means are included formo'ving the first saw from the workpiece. A second sawis pivotally mounted to the apparatus and movable independent ofsuch pivotinginto the workpiece adjacent the first cut made in the workpiece and from the worksaw'asser nbly 44 may be set.

Top portion 42 has fixed thereto a'slcevc' flfl in which a shaft vidcd von-the' end of the shaft 72- totkecpit disposed in the sleeve 70. It will be-scen that the. guidezmctnhcrmand saw assembly 76- are together pivotuhle relative to the top portion 42. Theshaft 72 andsleeve mallow-pivoting thereof l8(). Scale means 80', and asplitring" 82; similar tosplitring 66, are

' provided so that-the position oftheguide member'l-t and saw assemhly 76 may be set.

r1 f cylind r casing 112,,lying 3 Saw assembly 76 is made up of a motor mount 84 slidably mounted on rods 85 mounted in guide member 74, an electric motor 86, a casing 87 held relative to the motor and a saw blade 88 fixed to the motor 86. The assembly 76 is slidable fromone end of the guide member 74 to the other. The saw blade 88 may thus be moved from position C to position D and back again.

Fixed to an end of the tracks 12, 14 are a pair of braces 90, 92 to which a substantially C-shaped member 94 is fixed. This member 94 has a lower portion 96, an upright portion 98, and a top portion 100, similar to member'36. A saw assembly 102, similar to saw assembly 44, is pivotally mounted to the lower portion 96. The saw assembly includes a U-shaped bracket 104, motor mount 106, an electric motor 108 and a saw blade 110. The motor mount 106 and motor 108 are pivoted about a pin (not shown) in the bracket 104, whereby the saw blade 110 is movable from position E to position F and back to position E again. This movement is similar to the movement of motor mount 50, motor 54, and saw blade 56 as shown in FIG. 2. A casing 112 serves the same function as casing 62. A split ring 114,.similar to split rings 66 and'82, is included to fix the position of the saw assembly 102 relative to the base portion 96. The saw assembly 102 is pivotable to the extent of 180 relative to the baseportion 96. Scale means 116 are included 7 so that the desired position of the saw assembly 102 may be set.

Top portion 100 has pivotally fixed thereto structure similar in construction and operation to guide member 74 and saw assembly 76 of FIG. 2. This structure includes a longitudinal guide 120, along which a saw assembly 118 (having a motor 122, saw blade 124 thereon, and a casing 125) is slidable from one end to the other thereof. The saw blade 124 is thus mova- 1 ble from a position G to a position H and back'again to position G. Pivoting of l 80 of the saw assembly 118 relative to the top portion 100 is allowed. Scale means 126 are included so that the proper position of the saw assembly 118 can be set, and a split ring 128, similar to split ring 82, is included to fix the position of the guide member 120 and saw assembly 118 relative to the top portion 100.

r A locking member 130 is fixed to runner 24 and is adapted =to grip the track 12 to hold the member 36 relative to the member 94.

Fixed to upright portion 98 and extending inwardly therefrom parallel to tracks 12, 14 is a bracket 132 having an arm 134 extending'therefrom toadjacent the sawassemblies 102 and 118. Similarly, fixed to upright portion 40 and extending inwardly therefrom parallel to tracks 12, 14 is a bracket 136 having an arm 138 extending therefrom to adjacent the saw assemblies 44 and 76. The arms 134, 138 are similar in construction, and one (134) of these is shown in FlGS.4and 5.

Arm 134 is made up of two sleeves 140, 142 in which cylinder 144 and 146 are respectively disposed. The rod 146 is slidable in the sleeve 142 and the position of rod 146 relative to sleeve l42 may be fixed by means of a ball-and-pin assembly 148 the pin of which may be disposed in an aperture 150 in the sleeve 142 and one of a series of apertures 152 in the rod 146. The rod 146 has extending therefrom an angle arm 154 to which a pivotal arm 156 is attached. Piston rod 144 has fixed to one end a plate 160 which in turn has a stop 162 fixed thereto. A spring 160 to bracket 132 to keep the plate 160 against'slceve 140 in its rest position. I l

ln the operation of the device as described, the saw blades 88 and 124 are normally in positions C and G respectively, being resiliently held there by'air'p'ressure in a system not move these pivotal arms to the upper position shown in H0. 5 and hold them there, whereby the piece of wood will beheld between these pivotal arms and the stops (as 162). The position of therod 146 relative to stop 162 (in the set position) may be varied by sliding the rod 146 (and the pivotal arm 156 with it) and placing the ball-and-pin assembly 146 in the proper aperture 152 in the rod 146. The structure of arm 138 may be adjusted in the same manner. Various widths of wood mayjthus be properly held thereby. A support stand 166 may be included nearthe middle of thedevice to aid in supporting the workpiece if it i sj lon'g (i.e., if C-shaped members 36 and 94 are spaced relatiyelyfar apart).

The saw assemblies 44', 76, 102, 118 are then pivoted so that saw blades 56, 110, 124 will move intothe workpiece at a chosen angle to make a desired cut, and 'are"lockcd from pivoting as described above. Motors 54, 86, 108, 122 are then actuated to rotate the saw blades. Pneumatic cylinders. connected by lines to an air pressure source are used with the saw assemblies 44, 102 to pivot the saw blades 56, 110 from their normal positions (A and E respectively) to their positions 8 and F respectively, whereby cuts are made in the workpiece. The air pressure to these pneumatic cylinders is then cut off, and the saw blades 56, 110 will be moved back to positions A and B respectively, by air pressure, as described above, and removed from the workpiece. Pneumatic cylinders, connected by lines to an air pressure source, are used with the saw assemblies 76, 118 to move them (and'saw blades 88, 124) along guide members 74, 120 respectively, the saw blades 88 and 124 moving from position C to position D and from position G to position H respectively. Cuts are thereby made in the workpiece, the saw blades 88, 124 traveling along paths into the workpiece butjust above the casings 62, 112 respectively. The air pressure to these pneumatic cylinders is then cut off, and the saw blades 88, 124 are moved back to positions C and G respectively by the air pressure described above, and from the workpiece. The air pressure to pneumatic cylinders holding the pivotal arm 156 and the like pivotal arm on arm 138 is then cut off, whereby the workpiece is no longer held relative to the device 10. Pneumatic cylinder 144, and a like cylinder in arm 138, are then actuated for a short time to kick the workpiece by stop means 162 and a like memberon arm 138. These cylinders are then moved back to normal position by spring 164 and a similar spring in arm 138.

it will be seen that a variety of cuts may be made on a work piece so that the ends of the workpiece may be cut to desired configuration. A few of these cuts are shown in FIGS. 7A through 713. A single cut on one end of the workpiece, as in FIG. 78, may be made by only actuating one of the same assemblies mounted on a C-shaped member. if preferred, only the saw assemblies mounted on one of the C-shaped members may be actuated, and the other end of the workpiece left uncut. A great variety oflengths of workpieces may be cut by the devicev 10 by merely moving C-shaped member 36 along tracks 12, 14 toward or away from C-shapcd member 94 and locking it in place by locking member 130. Each member of the truss 168 of FIG. 8 may be cut to proper specification by the device.

In this embodiment, each saw blade 56, 88, I10, 124 is moved to cut entirely through the workpiece. However, it will be seen that alterations can be made to the device so that the 164 runs from plate pivotable about a common axis, and the saw assemblies 102 and 118. are pivotable about another common axis. The

a desired length of the resulting workpiece may thus be chosen shown. Saw blades 56 and 110 are normally in positions A and E, beingheld there by air pressure. A piece of wood or other workpiece is then.

v arm 156 and the pivotal arm connected to arm 138 are in the lower position shown in FIG. 5, Pneumatic cylinders, and lines:

connected from them to a source of air pressure, are used to '70 placed on, casing 62, arm 138, arm 134 and across the top of each of them. The pivotal and will not vary even though the saw assemblies 44, 76, 102, 1 18 may be pivoted to various positions.

' The embodiment described is set up so that the complete operation is to a great extent automated. As described above,

the workpiece is placed in position. A button is pushed to simultaneously actuate the-pivoting of the arms on arms 134,

138 and start the saw motors 54,86, 108, 122. Pushing that corner of the plate button also actuates pneumatic cylinders which substantially simultaneously move saw blades 56, 110 into the workpiece.

As these saw'blades56, 110 move into their positions 8 and F- respectively, this movement trips switches which deactuate those pneumatic cylinders to allow the saw blades to be moved back to positions A and B respectively. As they move to these ders to allow the saw blades 88, 124 to be moved back to positions C and G respectively. Asthey move back to these positions, switches are tripped to release the hold on the workpiece. The operator may actuate cylinder 144 and the like cylinder in arm 138 to kick the workpiece from the device, all as described above. The device 10 is then ready to receive another workpiece. With this manner of operation, it has been found that up to 18 pieces per minute may be cut. 7

ln certain situations, it may be desirable to make a cut intermediate the ends of a workpiece for use in construction, for example, as a roof member. Such a workpiece 210 is shown with an intermediate cut 212 therein in FIG. 11. For making such a cut, a device 214 is shown in FIGS. 1, 9 and 10. The device 214 includes a pair of flanges 216, 218 on which wheels 220, 222, 224, 226 are mounted to run on tracks 12, 14. A crossmember 228 is fixed to flanges 216, 218. A plate 230 is movable longitudinally along crossmember 228 and lockable in position by means of lock 232. Pivotally connected to a 230 is a second plate 234 having a pair of upright tubular sleeves 236, 238 fixed thereto. These tubular . sleeves 236, 238 support a brace member 240 on which is fixed a support beam 242, on which is fixed in turn a wood block 244. Rods 246, 248 are slidably disposed in tubular sleeves 236, 238 respectively, and fixed to ends of rods 246, 248 is a plate 250 to which is fixed an electric motor 252. A dado blade 254 is fixed to the electric motor to be rotated thereby. A casing 256 substantially surrounds the dado blade 254 and is fixed relative to brace member 240.

A pneumatic cylinder 258 interconnects the second plate 234 and the plate 250. Air pressure is applied to the pneumatic cylinder 258 to move the electric motor 252 and dado blade 254 upward or downward in FIG. 9, the rods 246, 248 sliding in sleeves 236, 238 respectively as such movement takes place. In such manner, the dado blade 254 can be moved into and from a workpiece 260 disposed on woodblock 244.

A slot 262 in second plate 234 allows that plate, and the motor 252 and dado blade 254, to be pivoted, and locking means 264 are included to lock the blade 254 in position relative to the plate 230.

ln the use of the device 214, it is disposed on tracks 12, 14 of the device 10. Locking means 266 are included to lock the device 214 relative to the tracks 12, 14, and to a workpiece to be held by the device 10. The position of plate 230 relative to crossmernber 228 may then be chosen and fixed by locking member 232. The motor 252 and blade 254 may then be pivoted to a desired position and locked in place by means of locking means 264. A workpiece 260 is then disposed on and held by the device 10 as disclosed above. The position of the motor 252 and blade 254 are chosen so that the workpiece rests on woodblock 244. The pneumatic cylinder 258 may then be actuated to move the dado blade 254v into the workpiece to make 'a cut therein ofthe type shown in FIG. 11. The

pneumatic cylinder 258 then withdraws the blade 254 from the workpiece 260.

The operation of the device 214 may be going on during the operation of saw assemblies 44. 76. 102, 118 and may, of course, be actuatcd automatically by switches similar to those described previously.

lt will be seen that herein is provided a device which is capable of making a variety of cuts on a workpiece by moving saws relative to a workpiece held by the devices. As described,

airs of cuts on both ends of a work iecc can be made by movmg the saws. The device describe to make these cuts is extremely simple and efficient in operation, and can turn out a great number of finished workpieces in a relatively short time. This allows a great number and variety of, for example, wooden frame pieces to be cut so that they can be assembled into a truss easily and conveniently. The device can easily be adjusted, as described, to allow for a single cut, or no cuts at all, on one end of a workpiece and a accommodate a great variety of lengths of workpieces. lf desired, the device may be set up so that a saw blade (or saw blades) do not cut entirely through the workpiece, or may be set up so that a full cut is made, severing a piece from the workpiece.

The adjustment feature of the support arms may be utilized to accommodate varying widths of workpieces. The stops (as 162) can be changed to vary the overall position of the workpiece so that cuts of proper disposition can be 'in the workpiece.

Obviously, ferent ways, and the embodiment shown and described is merely illustrative. Consequently, we do not desire to be limited by the embodiment shown and described, but only by the scope ofthc following claims.

We claim:

1. Apparatus for making adjacent, intersecting cuts workpiece, comprising:

a. a frame member;

b. an elongated guide member mounted on said frame member for pivotal movement about a first axis;

c. a first rotary saw mounted on said guide member for movement longitudinally of said guide member so that its blade moves in a first plane including said first axis;

d. bracket means mounted on said frame member for pivotal movement about said first axis, said guide member and bracket means being spaced from one another along said first axis;

e. a second rotary saw mounted on said bracket means for pivotal movement about a second axis generally normal to said first axis;

f. means for positioning a workpiece between said saws;

g. means for moving said first saw longitudinally across said workpiccef I h. means for moving said. second saw pivotally about said second axis into said workpiece; and

i. whereby said first and second saws are adapted to make adjacent intersecting cuts in said workpiece, the point of intersection of said cuts being on said first axis regardless of the angle said cuts make with'one another.

in a

the invention can be carried out in many dil

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