DE44946C - Machine for cutting boards. j - Google Patents

Description

PATENT LETTERING

Patented in the German Empire on March 14, 1888.

This invention relates to that class of wood cutting machines in which the Block of wood guided by a sliding head against the knife and the latter by a direct Cutter head connected to the piston of a steam cylinder over the surface of the wooden block is guided back and forth. Up to now, the slide of the steam cylinder was used in machines of this type reversed by means of lugs on the knife carrier and thumb on the frame, which in the slideway of the said lugs were attached; so was the advance mechanism put into operation by similar institutions; the tremors caused by the sudden mass-wise movements of the parts concerned had to appear, had detrimental consequences on the functioning of the whole machine, and The wear on the control parts and the feed mechanism was relatively great. There is also the knife holder, i.e. the piston rod, the normal stroke when insufficient high counter-vapor tension, since in this case the piston is not in time reversed, it could easily damage the cylinder cover and thus a Failure of the whole machine will occur.

The purpose of the present invention is now, to improve the marked, direct-acting wood-cutting machine in such a way that the Movement of the knife carrier is safer and easier and the control mechanism, as well the mechanism for advancing and withdrawing the block carrier in its construction, is simpler and lighter and more durable in its mode of operation than with previous machines.

These innovations mainly exist in the following facilities. In connection of the reciprocating knife carrier with a crank on a rotating shaft a connecting rod, whereby easy movement of the carrier is ensured when a hub change occurs; furthermore in the connection of the rotating shaft with an auxiliary ' steam engine to prevent the knife carrier from coming to a standstill in the dead zones; in the inevitable influence of the slide as well as the feed mechanism rotating shaft, in the retraction of the sliding head by mechanisms which can be operated from the auxiliary machine when the cutter head is at a standstill for a new one To introduce blocks of wood, and finally in the execution of certain individual constructions, which should be explained and described in more detail below.

In the drawings representing the invention:

1 shows a front view of the wood cutting machine in which the steam cylinder is arranged in such a way that the cutter head is moved back and forth in front of the block at an angle of 45 ° ^;

Fig. 2 is an end view of the machine,

Fig. 3 shows a plan of the same,

FIG. 4 shows a section along yy of FIG. 3, seen to the rear.

Fig. 5 is a rear view, on a larger scale, of the rear beam C and the

Bed C m with the feed and retracting mechanism for holding down position of the arm \

6 shows a side view on a similar scale of the advance and retraction mechanism, seen to the right from the section line χ- χ of FIG. 3; the arm m ¹ and the cranks o ⁴ and r ¹ are shown in a raised position,

7 shows a front view of a construction of the machine, in which the cylinder with the guides of the sliding head is arranged inclined horizontally. The crosshead and his The connecting rod is omitted in order to clearly show the sliding head.

Fig. 8 shows a basic outline of this modification, omitting individual smaller parts,

Fig. 9 is a front view and

Fig. 10 is a side view of the sliding head,

11 shows a view from below with a section through the clamp c ² ,

Fig. 12 is a side view and

13 is a front view of the block in FIG larger scale. *

The machine illustrated by the drawings rests on a base plate A on which the bed is supported by the uprights BB ¹ and B ^2, which bed consists of a front beam C, the rear beam C ¹ , the bed C ² and the end beam C ³ .
; D is the sliding head with the strips D \ which have dovetail-shaped guides D ² , which are fitted to the bed C ² and / to guide the block L ² (FIG. 6) back and forth; this movement of the block is caused by screws EE , which are connected to one another by sprockets e and chain e ¹ (Fig. 3). FF ¹ are the guides for the knife carrier G, which is directly connected by a piston rod 1 to the piston of the steam cylinder H , which is carried by a bracket H ¹ attached to the base plate A. J is a crankshaft which is supported in the bearings K on the stands B ¹ and B ² , and the crank J ^[ is connected to the knife carrier by a connecting rod L.

On the steam cylinder H is the valve body at h, the valve of which is controlled by an eccentric i wedged onto the shaft J by means of a rod h ^] and receives the steam required for operation through the steam pipe M. The steam pipe M is provided with a throttle valve M ^x which can be moved by a lever N or is rotatably mounted on a platform O which is attached to the carrier C (Fig. 1).

P is a standing auxiliary steam engine, which is arranged on the plate C ⁴ above the stand JS ² and transmits its rotating movement to a shaft P ¹ mounted on the stand B ² through a drive belt P ³ and pulley P ^a .

α is a roll which is pressed onto the wood of the block lying next to the knife k ^{, α 1} is a wood chip separated from the block (FIG. 2).

While the cylinder H generates the driving force for the reciprocating knife carrier, the control mechanism of the cylinder //, which, as mentioned above, is connected to the shaft J , is driven by the auxiliary steam engine by means of the gear wheels O ¹ and O ² (Fig. 2), the dead spots of the cutter head are also overcome by the driving force of the auxiliary steam engine.

m is a bracket supported by the carrier C, which ^{has to carry two oscillating shafts o 2} and o ³ and lies next to one of the two screws E. The shaft o ³ carries a feed arm in ^{FIG. 1} , on which a pin r is arranged which is adjustable in a slot and which is set in vibration by a thumb disk to ⁸ (FIGS. 3 and 4) wedged onto the crankshaft J.

The transfer of the movement from the thumb disk m ^a to the pin r takes place through the parts m ⁶ m * m ³ and m ² , namely by means of the antifriction roller rolling on the circumference of the thumb disk, the lever m ⁵ rotatably mounted on the stand B ^{2 becomes} Vibration offset, which this movement by means of rod m * on the angle lever m ³ and from the latter through. Rod m ² on the pin r of the arm m ¹ transfers.

On the inner side of the shaft o ² , a crank o ^{4 is} attached, which is set in pendulum-shaped oscillations ^{by the connecting rod o 5} from the pivot r of the oscillating arm m ^{x, which can be adjusted in a contactor.} On the outer side of the shaft o ² , the '' locking cone crank r ^{1 is} keyed, which two locking cones r ² and r ^{3 act} on the teeth of a gear r ⁴ . This gear wheel r * _r engages the feed wheel r ⁵ wedged onto one of the screws E , and since the deflection of the arm m ¹ always remains even, the pin r in the slot of the arm m ^{1 determines} the movement of the shaft o ² and consequently also that of the feed pawls, so that the rotation of the screws E and the advance of the workpiece are changed.

The locking cones r ² and r ³ are connected by a connection s ^l , a lever ² and a ^{belt 3} with a weight n> , which causes an automatic triggering of the locking cone r ³ when the work piece is finished. The lever s ² is mortised on a shoulder of the crank r ¹ and is connected to one end of the belt s ³ , while the other

The end of the latter is connected to a rod s ⁴ to which the weight w is attached, which is held during the functioning of the feed mechanism by a bolt s ⁵ (Fig. 6) which engages in a groove made ^{in the rod s 4.}

In Fig. 5, the rod s ^{4 is} drawn hanging down with the weight w , so that the band s ³ is pulled taut downwards and. triggers the locking cone from the gear. In order to bring the locking cone into engagement for the purpose of causing the feed, the rod s ⁴ with the weight w is raised by a pedal device tu ¹ and the bolt s ^{5 is} inserted into the above-mentioned groove, so that the feed mechanism is activated. When the block of wood has been cut, the advancing mechanism is set to work ^{by simply pulling back the bolt s 5} and thereby causing the weight w to act.

The screws E cause a movement of the sliding head by stepping into the nuts Zf ¹ on the strips of the sliding head, and are ^{rotatably mounted in the oscillating sleeves i 1} , which in the bearings u are provided on the bed C ¹ . The bearings are internally threaded and the sleeves have a matching thread on the outside and have cranks t ² , through which they, through the intermediary of the rods t ³ and if ⁴ , which the latter is connected to the crank i ⁵ on the arm m ¹ , be set in vibration. The rotation of the sleeves in the screw thread bearing bearings u causes the screws to move in the direction of their longitudinal axes and a slight retraction of the workpiece from the knife during the return stroke of the latter.

2, 3, 5 and 6 show the device for pulling the sliding block completely away from the knife when a new wooden block is to be inserted; this device consists of a friction wheel V which is attached to the end of the feed screw E and can be rotated in one direction or the other thereby. that leather discs F ¹ are pressed against it, which rotate in the opposite direction. • The disks or wheels F ¹ are set in rotation by shafts / ² which are rotatably mounted in an oscillating bearing F ^2; the rotation takes place by connection to the auxiliary machine, as can be seen from FIGS.

The waves P. are driven through the link vv ¹ from the auxiliary machine and are connected by a pair of gears to set them in rotation in opposite directions. A hand lever Q. is used to incline the self-aligning bearing V- in one direction or the other and thereby ^{bring one of the two disks F 1} into contact with the wheel W; when the pawls are withdrawn from the feed ^{wheel r '1} , the screws can then be rotated by the frictional contact of the washers FF ¹ to quickly withdraw the slide block for inserting a block or propelling it for cutting. If the acting by friction drive occurs, the steam from the Hauptcylinder H is shut off by the lever N formed by the rod w ^2, the shaft P ¹ slows down and through the rod ² and the lever n o ^3, the coupling of the pulley P? loosens with the wave; the movement of the lever N thus separates the auxiliary machine from the main crankshaft.

The work piece, the log, is attached to the sliding block by fixed lugs d on the lower edge (Fig. 7) and by lugs d ^l ' , which are provided with a tooth b at each end and which are rotatable on blocks b ^{2 which in} Slide Nuthen b ³ , which go transversely through the slide block D. Screws f press the blocks with the rotatable lugs against the wooden block and a similar rotatable lug at one end of the sliding block, which takes the pressure of the knife during cutting, c ² is a lug which is in a groove at the other end of the Block is attached and is moved by a rack g , which is adapted to a pawl on the lug and is moved back and forth by the hand lever d *. The pawl has a tail piece c ⁵ to lift it out of the tooth cut when it is to be returned; the hand lever is provided with a fastening ^{screw af 5} in order to hold the catch in the workpiece during cutting.

Claims (6)

Patent claim: A wood cutting machine, characterized by the combination of the following simultaneously existing facilities: 1. The connection of the direct attack. the piston rod of the steam cylinder moving knife holder G with a connecting rod L engaging the crank J ^l ■ Control of the stroke, as well as with the auxiliary steam engine P in such a way that the latter prevents the piston from coming to a standstill in the dead center. 2. The connection of the sliding block D ^ carrying the wooden block with the feed screws EE in such a way that the eccentric m ^e on the shaft J by means of the lever and the locking crank transmission an intermittent · feeding of the block carrier D is initiated. 3. The connection of a sliding block D that can move back and forth against the knife carrier with the screws EE, which can be rotated in bearings and * fit in nuts on the sliding block. . ■ ingestible feed mechanisms for these bolts a Frictionsscheibe F, on one of the screws two Frictionsscheiben F ^1, which rotate in the opposite direction, and with means for either one or the other to press this Frictionsscheiben to the first-mentioned Frictionsscheibe and the slide block from the carrier to lead back and forth quickly. ' 4; The connection of the sliding block D with the screws E which fit into the nuts of the sliding block, furthermore with externally threaded sleeves mounted in such bearings, in which the screws are rotatable, while shoulder lugs prevent longitudinal movement, the screws with feed mechanisms and Devices for actuating the same, as well as for oscillation of the threaded sleeves are connected to the stroke ends of the knife carrier. 5. The connection of a sliding block, which is movable by a screw in the block is, with a lug rotatably attached to the sliding block, which is attached to the opposite ends is provided with teeth. · ■ 6. The connection of a lug fixed to one end of the sliding block with a Latch, which is movable towards the other end of the 'block, on a latch the catch and a rack, which is moved by a hand lever to press the pawl and lug against the end of the block and prevent longitudinal movement. For this purpose 2 sheets of drawings. BERLIN. PRINTED IN THE BEICHSBRUCKEREI.