Patent GB-584403-A (GB)
Title: Improvements in or relating to tying mechanism for baling machines
IPC: A01F15/14
Filed: 1944-10-03
Abstract: 584,403. Binding apparatus. INTERNATIONAL HARVESTER CO. OF GREAT BRITAIN, Ltd. (International Harvester Co.). Oct. 3, 1944, No. 18918. [Class 6 (iii)] [Also in Groups VII and XVII] In a baling-press described as incorporated in a tractor-drawn pick-up harvesting-machine having a baling-chamber and tying-mechanism including a needle which passes through the baling-chamber to place a cord, &c. round the bale, the end or eye portion of the needle is pivotally carried on the end of the curved body portion of the needle. The return of the needle is retarded by a brake. Movement of the tied bale through the chamber completes the tying operation. The machine has a pick-up device which picks up the hay &c. and deposits it on a transverse platform from where it is fed by packing-members through a side opening into the baling-chamber 13 where it is compressed by a reciprocating plunger. The machine is driven from the tractor. There are two needles 56 secured to a cross tube 60b, Fig. 4, mounted in arms 61 pivoted to the chamber 13 at 62, these arms being oscillated by a link actuated by a cam 77, Fig. 3, secured to a shaft 31. Each needle is arcuate and comprises a tubular body portion 59 to which is pivoted at 58 an end portion 57. The end 57 carries rollers 60, 60a, the former for guiding a tying-cord 55, and the latter for contacting a curved cam guide 82, when the needle passes through the chamber 13, to guide the end 57 which places the cord into the knot-tying apparatus. Connected at 64 to the end portion 57 of the needle is a link 63 having at the other end a notch 65 engaged by a spring-pressed pawl 67 mounted on the tube 60b. A lug on the pawl bears on and moves along a fixed guide 71 until the end 57 of the needle passes through the chamber 13 ; at this stage the lug passes beyond the guide 71 to release the pawl and allow the pivotal movement of the end 57 of the needle. The drive to the knot-tying device comprises a power shaft 25, Fig. 3, driving the shaft 31 through bevel gears 26, 27 and clutch 29, 30. The member 30 and a member 38 are keyed to the shaft 31 and are provided with segmental gear portions 36, 37 and 40, 41, respectively. The segments 36, 40 engage bevel gears 42 on shafts 43 which carry cord-holder discs 44, and the segments 37, 41 engage bevel gears 49 on shafts 50, Fig. 13, carrying bill-hooks 51 having co-operating and relatively movable jaws 52. One jaw of each hook 51 has a follower 53 engaging a cam. Each disc 44 rests on a cord-holder plate 45 carried by a bolt 46. The bill-hook and cord-holder device are as described in Specification 568,647 and operate in conjunction with the needle to form a loop around the hook, sever the ends of the cord pressing the cord against a fixed knife, and grip the ends of the jaws 52. The knot is completed when the needle is withdrawn and more material is fed into the chamber 13 and compressed by the plunger, by the movement of the tied bale along the chamber. This causes the loop on the hook 51 to be pulled off the hook whilst the ends of the cord are still gripped by the jaws 52. The return of the needle is braked by means comprising a flat spring lined with braking-material secured near the end of an arcuate guide 74 and adapted to be engaged by the tubular body portion 59 of the needle.