Dec. 23, 1952 G. B. HILL BALING PRESS Filed Dec. 20, 1946 Patented Dec. 23, 1952 U-N-I'TIEID STATES PATENT OFF-ICE B LIN RESS George BrHill, Ottumwa, Iowa, assignor to Deere Manufacturing Co. a corporation of Iowa Application December 20, 1945, Serial No. 717,563
, 2 Claims,
1 The present invention relates 1 to automatic wire-tying,balingpresses and more particularly to. the wire tying mechanism thereof, and. is in the nature. of an improvement over the mecha-. nism disclosed in a copending application, Serial No. 594,684 filed May 1-9,- 1945 by Miles H. Tuft, now U. S. Patent 2,512,754, dated June 27 1950. This mechanism includes a pair of slotted twister gears for receiving the strands of wire to be tied together-and-a single drive gear meshing with the twister gears for driving the latter to twist the wires together to secure the bale. The two twister gears were disposed, in diametrically opposed relation to the drive gear, the latter being of a diameter three. times the diameter of each twister gear and the three gears positioned in a plane perpendicular to a wall of the bale case, thus spacing the two binding wires on the bale. One, revolution of the drive gear rotated the twister gearsthreetimes; This arrangement had two disadvantages: the large diameter of the drive-gear spaced the-twister ears away from the bale caseso that when the wires/were tied; around the bale-they-were'too; long to hold the material tightly compressed in the'bale; and it was found that the-wires should be twisted'together morethan three times to secure-them properly. Merely increasingthev diameter of the drive gear disposed of the second disadvantage but resulted in spacing the twister gears even fartherfrom the bale case, thereby exaggerating the first mentioned disadvantage.
The principal object of the present invention relates to the provision of an arrangement of drive and twister-gears in which the; spacing between the two wires on the, bale is maintained at thedesired amount,--the drive gear' isincreased Figure2 is a sectional elevational'view'of the press as taken along a line-2'-2 in Figure-l and showing a part of the wire tying mechanism;
Figure 3 isan elevational viewsimilar to Fig ure .2 but with the front half of the casing re-. mored; and
nism indicated generally by reference numeral I0 7 and including, a serrated measuring wheel H adapted to contact the bale being formed and to initiate a tying operation when the bale acquires a predetermined length, by means of a self interrupting clutch I2 receiving power from a continuously driven chain I3 and sprocket M. The clutch rotates a shaft I5 through a single revolution responsive to the completion of a revolution by the measuring wheel ll, thereby rotating an arm is through one revolution. The arm [6 is connected to a link l! by a pin l8 passing through a slot l9 and shiftable. therein radially of the arm. A roller is journaled onthe pin I8 and rolls around a track 2| on the edge of a stationary plate 22. The link I1 is connected to a pair of needles 2-3, which are normally disposed beneath the bale case 5, and operates during a rotation of the shaft Hi to raise the needles upwardly through the bale case 5 to insert the upper ends of the needles through openings or apertures 24 in the topv wall 8 into tying position, indicated in Figure 4. Further reference to the exact spacing of these openings will be made below.
The mechanism so far described is disclosed and claimed in copendingapplications, Serial No. 598,363, filed June 8, 19515 by George 13. Hill and J. R, West, andSerial No. 602,810 filedJuly '2, 1945 by H. W. Bloss, and is not disclosed herein in detail inasmuch as'it does not form an essential part of the present invention.
Coming now to that part'of the structure with which the present invention is more-particularlyconcerned, the wire tying mechanism includes a casing comprising a pair-of complementary sections 3|, 32-secured rigidly together by bolts 29', thusdefining a-drive gear chamber 33, within which is rotatably disposed a drive gear 34 fixed to'a drive shaft 35 journaled in suitable bearings 3.6"i-nthe casing 30. The'shaft 35'is connected by suitable gearing (not shown) to the shaft l5 to be rotated through a single revolution when theshait: I5 rotates through one revolution. A
pair of twister ears .40. 14lare rotatably disposed within a pair of chambers 42, 43, respectively, within the casing 30 and mesh continuously with the drive gear 34. The twister gears have no supporting shafts but are confined within their respective chambers 42, 43 as they are rotated by the drive gear 34. The twister gears each have a diameter equal to one-fourth the diameter of the drive gear 34 and therefore rotate four times during a single revolution of the drive gear 34. As best seen in Fig. 3, the diameter of the drive gear 34 is substantially equal to the distance between the axes of the twister gears.
Each of the twister gears 40, 4| is provided with a radial slot 45 extending from the center of the gear outwardly between two gear teeth to receive the two strands of wire to be tied together. These strands are conventionally and preferably spaced apart on the basis of what may be termed a wire-spacing distance, which is here substantially equal to one-half the width of the bale case. I-Ience, although the openings 24 may not have their center lines so spaced apart, they are of sumcient size to include the wirespacing distance therebetween and in any event provide access respectively to the wires. One strand 46 is drawn from an upper coil of wire (not shown), passing downwardly around a pair of vertically spaced sheaves 41, 48 journaled in a bracket 49 attached to the casing 30. The strand 46 passes through the slot 45 in the associated twister gear 4| and thence over the top of the bale being formed, at the opposite end of which the strand 46 is tied to a lower strand 50. The lower strand 50 encircles the end and bottom of the bale and passes over a pair of small sheaves 52 journaled in a pair of upstanding fingers 53, 54 on the upper end of the needle 23, from which the strand 50 extends down along the needle to a lower coil of wire (not shown). Another pair of upper and lower coils and a needle are associated with the other twister gear 40 as described above.
After the bale has attained its predetermined length, the wire tying mechanism is actuated,
causing the needles to move upwardly through the bale case to bring the lower strands of wire 50 into the respective slots 45 in the twister gears 40, 4|, as indicated in Figure 4. A revolution of the drive gear 34 then rotates the twister gears 40, 4|, each of which twists the two strand 46, 50 within the slot 45 four times, after which the strands are severed between the twisted portions, and the latter are kinked by a pair of kinkers 55, 56.
Inasmuch as the kinking mechanism is not directly concerned here, a detailed description thereof is not deemed necessary, but a complete disclosure is contained in the above mentioned application by H. W. Bloss. It is sufficient to state that the pair of kinkers 55, 56 associated with each of the twister gears are disposed on opposite sides of the associated gear, respectively, and are mounted on a pair of vertical shafts 66, 61, journaled in the casing 30. The shafts are connected by a pair of meshing gears 68, 69 and are driven by a gear fixed to the upper end of one of the shafts 6! above the casing 30. The gear 16 is rotated by a gear segment 1| rotatably mounted on a spindle 12 on top of the case 30. After the twister gears have rotated to twist the strands together, the gear segment H is oscillated by suitable means (not shown) acting through a. link 13, thereby causing the kinkers to rotate through a portion of a revolution and return to their original position.
The strands are severed by a cutting edge 51 on one of the kinkers 55, as the latter rotates about a vertical axis, the edge 51 acting against the edge of the slot 45 in the associated twister gear to sever the wires. This leaves the strands 46, 50 around the bale now tied together by one of the twisted portions, while th other twisted portion ties the wires 46, 50 from the upper and lower coils. The needles are then withdrawn and a new bale is begun with the next charge of baling material.
The casing is mounted on the top wall 8 of the bale case by means of a pair of upstanding brackets 60, 6|, which are bolted to opposite sides, respectively, of the casing 30 by bolts 62, 63, with the slots 45 in the twister gears 40, 4| directly above and in register with the apertures 24 in the wall 8. The casing 30 is provided with slots 65 in the lower portion thereof beneath and in register with the slots 45 in the gears 40, 4|, respectively, to provide for bringing the lower strands 56, by means of the needles 23, up through the bale case, through the apertures 24, and through the casing slots 65 into the gear slots 45.
Important features of the invention reside in the relative dimensions of the parts so as to locate the twister gears 40 and 4| relatively close to the top of the bale case, and thus they are relatively close to the bale being tied. This results in the elimination of excess slack in the baling wires.
As shown in Figure 3, the side walls 6 and 1 of the bale case are spaced apart a, distance A. The horizontal axes of the twister gears 40 and 4| are spaced apart a transverse distance B, which is substantially one-half the distance A. It will be seen that the distance B is included in the spacing of the openings 24. The line 0-0 is a line perpendicular to the axis of the left-hand twister gear 40 and the line DD is a line perpendicular to the axis of the right-hand twister gear 4|. The line EE is perpendicular to the axis of rotation of the large gear 34.
F is the diameter of the gear 34 and G i the diameter of each of the twister gears 40 and 4|."
H is the distance between the lines 0-0 and DD, or the distance between the axes of the twister gears. J designates the relatively close proximity between a line XX and the top of the bale case 5. The line XX is tangent to the bottoms of the three gears 34, 40 and 4|.
It will be observed that the diameter F of the gear 34 is substantially equal to the distance H.
The distance H is substantially equal to the dis-' tance B, which maybe referred to as a wirespacing distance, which, as stated above, is substantially equal to one-half the distance A between the two walls that adjoin the top wall of the bale case.
It will be also observed that the diameter G of each of the twister gears is on the order of approximately one-fourth that of the diameter F of the gear 34.
1. In a baling press having a plurality of walls assembledto provide an elongated bale case of rectangular section in which are formed bales of hay or straw the cross-sectional area of which is determined by the dimension of the bale case walls, one of the walls having a pair of openings spacing distance substantially equal to one-half the distance between the two walls that adjoin said one Wall, the openings being spaced equally at opposite sides of the longitudinal centerline of the bale case to provide access to bale-tying wires spaced apart according to said wire-spacing distance, the improvement residing in tying mechanism positioned adjacent said one wall and comprising! a support for the tying mechanism overlying said bale case wall and bridging the openings; gearing carried by the support and consisting solely of three gears, including a pair of twister gears respectively in register with the openings in the bale case wall and rotatable on axes that are spaced apart on the order of the wire-spacing distance and that are generally parallel to said bale case wall so that each twister gear rotates in a plane that is generally normal to the wall, each of said axes being closely spaced outwardly from said wall in a, direction normal to said wall and the diameter of each twister gear being such that the wall-proximate portion of the periphery of each twister gear is in close proximity to its associated opening and hence in close proximity to its respective wire around a bale in the case; the third gear of said gearing being a. single rotatable large gear in constant mesh with the twister gears and having its axis of rotation parallel to the twister gear axes, the diameter of said large gear being substantially equal to the distance between the twister gear axes and the proportion of said large gear to the twister gears being such that the wall-proximate peripheral portions of said three gears are substantially tangent to a plane closely paralleling said one bale case wall.
2. The invention defined in claim 1, further characterized in that: the diameter of each twister gear is on the order of one-fourth the diameter of the large gear.
GEORGE B. HILL.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS 'Number Name Date 535,754 Gates Mar. 12, 1895 894,876 Clark Aug. 4, 1908 1,369,612 Bowers Feb. 22, 1921 25 2,456,476 West Dec. 14, 1948