US1724042A - Sawing machine - Google Patents

Description

Au .13,1929. ,PR.E 1,724,042

SAWING MACHINE F le 1927 6 Sheets-Sheet 1 Zwenn Aug. 13, 1929. c. 5. PRICE SAWING MACHINE File Feb- 1927 6 Sheets-Sheet 2 Aug. 13, 1929. c s p I 1,724,042

SAWING MACHINE Filed Feb. 10, 1927 6 Sheets-Sheet 3 Aug. 13, 1929.- c. s. PRICE 1,724,042

' -SAWING MACHINE Filed Feb. 10, 192 '7 I 6 Sheets-Sheet 4 C. S. PRICE SAWING MACHINE Aug. 13, 1929.

File Feb. 10'', 1927 15 Sheets-$heet 5 Aug. 13, 1929. c, s, p c 1,724,042

SAWING MACHINE File F 1927 6 Sheets-Sheet 6 Patented Aug, 13, W29.

barren o'l'fit'lES lJZ ldttl PATENT OFFICE.

CHARLES S. PRICE, OF IBETHLEl-lll'llld, PENNSEJLVAHIA, ASSIGNOR TO L. F. GRAMMES 8r, SONfi, ING, F ALLENTOWN, PENNSYLVANIA, A. CORPORATION OF MARYLAND.

SANING MACHINE.

Application filed February 10, 1927. Serial No. 167,124.

My invention relates to a sawing machiiie designed to saw planks of wood into narrower planks or strips suitable for instance, as box stock and the object of my invention is to provide generally improved machine for this purpose having especially in view provisions for holding the plank being sawed against a gauge, provisions for ad justing a feed roller frame with respect to the plank supporting table, provision for throwing off the refuse edges sawed from the plank, provision for piling up the sawed lumber as it leaves the saw, provision for throwing off the refuse from the edges of the lumber and separating this refuse from the lumber being cut and piled, provision for feeding the lumber through the saws without marring the surface thereof, provision for ripping short lengths of lumber (rolls spaced closely), provision for throwing up the roller frame and also the table to give access to underlying parts and without interfering with the driving mechanism of the saws and feed rollers, provision for holding down the planks at the points where they are cut by the saws, provision for quickly relieving the planks from the pressure of the feed rolls, provision for adjusting the machine to saw strips of varying width and a generally improved construction of the machine.

The nature of my invention will be best understood as described in connection with the drawings, which illustrate a sawing machine providedwith my improvements and in which:

Figure 1 is a side elevation of my improved machine.

Figure 2 a plan view.

Figure 3a side elevation of a portion of the machine shownin Fig. l, drawnto a larger scale.

Figure 4t :1- plan view of the portions of the machine shown in Fig. 3, also drawn on the same scale as Fig. 3.

Figure 5 is an end view of the machine viewed from the right hand side of Figs. 3 or at.

Figure 6 is a cross section taken on the line 6*6 of Fig. 3 with special. reference to showing the means for securing the saw blades to and adjusting them on their driving shaft and for securing and adjusting on their driving shaft the short holding down or feed rolls wnich operate in direct connection with the saws.

Figure 7 is a sectional elevation taken on the line 77 of Fig. a.

Figure 8 is a plan view on an enlarged scale showing a portion of the table, the saddle pieces adjustable on the table, and the means for throwing off the edge strips of the sawed planks. V

Figure 9 a View showing the under side of the table and the means for securing the saddle pieces in position thereon.

Figure 10 is a detail view, taken as on the line 10--1() of Fig. 7, showing the device for holding the guide strips, which throw oil the waste, in position.

Figure 11 is a perspective view illustrating the guide strips which throw oil? the waste and some detail of their COllSt-l'UCtlOll and supporting means.

Figure 12 is a fragmentary view on a large scale showing the construction of the feed rolls.

Figure 13 a side elevation of a somewhat modified construction of my machine.

Figure let a plan view illustrating a dctail of the modified construction, this view being on a smaller scale, and

Figure 15 is a detail of the structure shown in Figs. 1., 2, 3, 4-, etc, illustrating the method of hinging the roller frame and one of the devices by means of which this frame adjusted with respect to the table.

A indicates the frame of the machine. the top of this frame rests the table 13 pro vided with lugs ll by means of which it is hinged on a transverse shaft indicated at C mounted in bearings formed in the upper part of the upwardly extending portions A of the frame. The table is adjustable for comparative height by means of a screw in dicated at I. A portion of the table B, lying immediately above the saws, is cut away, as indicated at B soc Fi 7 and 8, and formed with depressed guide seats, indicated at Z)", on which rest saddle pieces D. These saddle pieces are longitudinally slotted, as indicated at D to give passage to the saw blades, and when in adjusted position they are clamped to the under side of the table, as indicated atll Figs. 7 and 8.

F, E, are narrow metal strips having hooked ends E which engage in the slots D of the outer saddle pieces, these strips extending rearward over the table and being resiliently supported by means best shown in Figs. 8 to 11 inclusive; Ar shown, the

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strips are clamped between laterally extendlng plates E E secured to the edges of the split block E and clamped against the strip E by means of the screws E The blocks E are slidingly supported on the transverse rods and held in approximately fixed position by means of the abutting springs indicated at E To the rear ends of the strips E are secured the wedge pieces E, having, as shown, slits E formed in them through which extend the upper ends of uprights M forming a part of the receiving table.

F is a gauge in contact with the face of which the plank to be sawed is introduced into the sawing machine. This gauge is made adjustable along the table by means of the clamps F Along the rear outer edges of the table B are secured the adjustable slides G, G, carrying the pivot brackets G to which are pivotally connected arms G G on the free ends of which is supported the shaft Gr carrying the rear feed roller G The arms G are pressed downward by adjustable springs indicated at G G, G are cams pivoted on the shaft G and resting 011 the rear end of the table, G G being actuating levers for operating the cams, the function of which is to lift the feed roll G from the table. GS is a sprocket wheel secured on the end of the shaft G In the construction illustrated in Fig. 13 the shaft G is carried on the ends of arm 9 pivoted on the shaft C and supported upon spring 9 bearing against adjustable stop wheels G threaded to bolt Gr pivoted in bottom of table B by pin G H is the roller frame. This roller frame has a downwardly extending end portion II by means of which it is pivoted on the shaft C. As shown in Fig. 15, the end H of the frame H is slotted, as indicated at H and has a sliding block H moving in this slot against which rests the end of adjusting screw H*; H indicating a spring which tends to hold the-frame in position with respect to the shaft C, which shaft in the illustrated construction passes through the sliding blocks H In the modified construction, illustrated in Fig. 13, no sliding block is used, the shaft C fitting in the slot H as illustrated, and other means are employed in this modification for adjusting the roller frame vertically. H, H and H are shafts journalled on the roll frame'carrying,

respectively, the feed rolls 7t, 7t, 7L7, 72F, 72*. The shafts carrying the sprocket wheels, indicated at H", H and H and the front ends of the rollv frameare' supported on the table B by means of 'a cam H pivoted on a pin H andhaving an actuating handle I1 In the construction best shown 111 Fig.

3 an adjustable screw H is attached to the cam as shown and, by adjusting this, the

height of the frame above the table can be regulated when the cam is in position indicated in Fig. 3. lVhcn the cam is turned the end of the roll frame is lifted away from the table and the pressure of the feed rolls quickly released from the plank. Q, indicates an adjustable screw support by which the rolls can be partly relieved of the weight of the roll frame. In the construction shown in Figs. 13 and 14- I have shown a modified device for adjusting the roll frame with respect to the table; the device consisting of three supporting screws 0, O, 0, one of them provided with a handle O and all of them provided with sprocket wheels and an idler sprocket 0 over which passes a sprocket chain 0'. It will be obvious that by retating the handle 0 all of these screws will be simultaneously rotated with the effect of raising or lowering the frame here indicated at H, H. In this modified construction I use in place of the described cam H a cam h upon which rests the front aligning screw 0 and, obviously, by shifting this cam the front end of the roll frame H, II. can be quickly raised and the plank released from the pressure of the feed rolls.

It will be understood that the short rolls 71,7 secured on the shaft H are adjusted along the shaft so that they will always extend over the saddle pieces 1) and over the saw blades. Grooves 71h (Fig. 6) are formed in these short roll sections to give passage to the top of the saw blade.

It is desirable that the front feed roll It should be angularly adjustable in the frame H and for this purpose I journal this roll in laterally adjustable bearing blocks 1t, these blocks being formed with slots R which permit their lateral adjustment and secured in place by bolts R passing through these slots.

I is an adjusting screw upon which the free end of the table B rests and which adjusts the height of the table with reference to the saw blades, the table being clamped in position through depending lugs I and clamps actuated by levers, indicated at 1 J is a slotted shaft to which the saw blades are secured. This shaft is driven by a bell running over a pulley J and upon which are adjustably secured elongated saw holding hubs, indicated at J J, and J J indicating the saw blades and J 6 set screws for holding the hubs in adjusted positions. These set screws bear upon the outer surface of the keys which engage the slot in the shaft and are provided with dog points (not shown) engaging the keys to keep them in place laterally when pressure is removed.

In order to provide for a close adjustment of the saws and at the same time provide ample bearing of the hubs along the shaft, I form the hubs J and J with recesses, indicated at 7' and j, and I form the hub J" lIiU with lateral projections indicated at j, j of such dimensions that they can extend into the recesses and j", thus providing for a close adjustment of saws which is sometimes desirable.

K indicates a driving belt passing over a driving pulley K secured to the driving shaft K A pulley K is secured to the shaft K and a belt K connects this pulley with pulley J on the shaft J. K is a cone pulley on the shaft K which is belt connected by a belt K with a cone pulley K attached to a stud shaft K to which is also secured a sprocket wheel K connecting by a sprocket chain K with a sprocket wheel K secured to the shaft C by a sleeve I K and K are also sprocket wheels secured to the shaft C, the sprocket K connecting through a sprocket chain I 15 with a sprocket wheel G secured on the rear feed roller shaft G and the sprocket wheel K connecting by a sprocket chain I with the sprocket wheels H H and H secured to the feed roller shafts H, H and H L is a belt shifter for the belt K.

M is the receiving platform for the sawed strips delivered by the machine. As shown, this platform is provided with uprights h 1 the front one of which is conveniently inserted in the slot E of the wedge ends E attached to the guide strips E.

N, Fig. 12, indicates the rubber rings of which I prefer to form the driving surface of the feed rolls, these rings being symmetrically disposed in grooves formed in the face of the solid portion of the rolls.

S, S, indicate the marginal strips cut from the plank being sawed.

'1 indicates a hopper for the sawdust.

In operation the guage F being adjusted so as to fix the width of the marginal strip to be cut fromthe edge of the plank, the

plank is fed over the front of the table B in contact with the gauge F beneath the roller frame until it is engaged by the front feed roller 71. and by preference this feed roller is angularly adjusted in the roll frame so that it tends to force the plank against the gauge F so that even if the edge of the plank is not perfectly straight the plank will always be held in contact with the gauge. Passing from the feed roller 72?, the plank passes over the saddle pieces D, D, etc, against which it is Dressed by the short feed rolls 7L7 which ho d the plank in contact with the saddle pieces while it is being cut by the saws J The severed sections of the plank are next engaged by the feed roll hi and, passing over the rear portion of the tabie, they are engaged by the feed roller G which finally delivers them to the receptacle M.

In cutting planks of different thickness it is desirable to adjust the height of the table B and this is readily accomplished in the construction illustrated by the adjusting screws I.

It is of course important that in all adj ustments the feed rolls of the roll frame H should be adjusted so that they will all lie at the same distance from the surface of the table B. This, in the construction illustrated in Figs. 1 to 12 inclusive and Fig. 15, is effected by the operation of the adjusting screws I-I" bearing on the blocks H and of the adjusting screw II, which, together with the cam H supports the front end of the roller frame. In the construction shown in Figs. 13 and 1 1 this same adjustment is effected by the simultaneous operation of the adjusting screws 0, O, O, by means of the sprockets and sprocket chain described.

It is often necessary that the feed of the plank being sawed should be promptly arrested and this I provide for by the cam H, the turning of which raises the roller frame in the construction of Figs. 1 to 12 and Fig. 15 and by the cam it upon which the front adjusting screw 0 rests in the construction illustrated in Figs. 13 and l t.

In order to separate the scrap sawed from the outer edges of the plank the narrow metal strips E are hooked into the slots D in the outer saddle pieces I) and extend back over the table. The strips E are secured to the clamping blocks E and engage the upper portion of the narrow strips E, which strips E are provided with wedge shaped terminals E to throw off the waste and separate it from the work being piled on platform M. The function of lateral strips FF is to overlap the cut edges of the plank and prevent them from riding up over separat ing strips E. The strips and their attachments are supported, as described, from the transversely extending rods E and are permitted to move freely laterally by means of the abutting springs E In my construction I provide for the turning of the roller frame H on the shaft C to a position indicated in dotted lines at II in Fig. 3 and at HH in Fig. 13. In this position the cross bar of the roller frame nearest its pivotal support rests upon the table B. This gives convenient access to all portions of the machine lying immediately below the roller frame and I also provide for the tilting upward of the table B around the shaft C, in which case the roller frame tilts backward to the position indicated at H in Fig. 3 and at HH" in Fig. 13. The position of the table is indicated in dotted lines at B in Fig. 3 and at BB in Fig. 13 and the table is held balanced in this position by the weight of the roller frame. It will be observed that by the driving gear, which I have described, the feed rollers on the roll frame H or HH, are driven by av sprocket secured to the shaft C on which the roller frame is pivoted.

This enables the roller frame to be adjusted or thrown back as described without in any way interfering with the driving of the feed rolls and as the table B is also pivoted on the shaft C it may be thrown up as described without interfering with the driving connection to the rear feed roller G which is also driven by a sprocket wheel on the shaft C. In the construction of Fig. 13 the rear feed roller is supported on the arms 9' but as these arms are pivoted on the shaft C the throwing up of the table does not interfere with the driving connection with the rear roll.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is: l. A sawing machine having a frame and a saw carrying arbor journalled thereon in combination with a work table through which the saws project pivotally connected to the rear of the frame and adjustable about said pivot, a feed roller frame pivoted co-axially with the table, feed rollers supported on said frame and means for driving said rollers including a main driving wheel journalled co-axially with the frame and table.

2. A sawing machine having the features of claim 1 in which the feed roller frame is provided with means for adjusting it on its pivot to varying distances parallel to the table.

3. A sawing machine having the features of claim 1, having also a eo-axially pivoted, rearwardly extending feed roller frame, a feed roller, carried by said frame and means for driving said roller including a main driving wheel journalled eo-axially with the frame and table.

4. A sawing machine having the features of construction of claim 1, in which the roller frame when turned back contacts with the table and counterbalances it when the table is turned back out of operative position.

5. In a sawing machine having a frame, an arbor supporting one or more saws journalled on said frame, a work supporting table and feed rollers for feeding the work over said table, the combination therewith of means for pushing the waste strips away from the sawed strips consisting of thin metal strips having their front ends secured to the table in line with the outer saws and having wedge shaped rear terminals located to contact with the front edges of the waste strips and push said strips outward.

6. A sawing machine constructed in ac cordance with claim 5, having saddle pieces through which the saws extend laterally :idjustable over an opening in the table and hating the front ends of the metal strips secured. to said saddle pieces so as to be adjustable therewith.

7. A sawing machine eonst-ructe Jl in accordance with claim 5, said metal strips having lateral extensions from their upper edges adapted to extend over the wood being sawed.

8. A sawing machine constructed in aceordance with claim 5, said metal strips having their rear portions held in approximate alignment by springs.

CHARLES S. PRICE.

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