FR2475349A1 - BALL PRESS WITH KNIFE ARM - Google Patents

Abstract

THIS KNIFE HOLDER 10 FOR A BALE PRESS KNOTTING MECHANISM IS IN TWO PARTS. ONE OF THEM IS A 12 FORK SHAPED PART THAT RECEIVES AND GUIDES THE TWINE TO TIE THE BALLS. THE OTHER SHAPES AN EJECTOR 14 WHICH IS MOUNTED ON THE PREVIOUS BY SCREWS 34 ALLOWING ADJUSTMENT OF THE POSITION OF THE EJECTOR IN RELATION TO THE FORK SHAPED PART. THE KNIFE 28 IS IN PART OF THE EJECTOR.

Description

Baler with knife arm.

  The present invention relates to a machine for baling crop products such as fodder or straw and for holding bales produced by string or the like, and a knife arm for a mechanism knotter used

  for binding the balls with string or the like.

  In known balers, the knotter mechanism comprises a unitary knife arm, which has a fork-shaped portion for receiving or guiding the twine encircling and binding a ball, a knife portion for cutting the string when a knot was made by means of a knotter beak acting in the space between the fork-shaped portion and the knife portion, and an ejector portion, which disengages the knot from the beak

of knotter.

  The fork-shaped portion and the ejector portion are integral, and the portion

  knife is attached to the previous ones by

  floor to complete the one-piece construction. It goes without saying that the knife arm must be as strong as possible, but the ejector portion must be able to bend in order to fit as closely as possible to the knotter's nose profile, so that the arm can free and frankly release the knot of the beak. These criteria are not entirely

  compatible, so that the construction of the arm

  knife is rather a compromise.

  The object of the invention is to create a device

  tif that can both be resistant and able to

  easily adapt to the knotter's beak.

  According to the invention, the knife-holder arm intended for a tying mechanism for machines used for baling crop products, such as fodder or straw, has a fork-shaped portion intended to receive and guide the string

  or the like and an ejector part, that part

  ejector forming portion being mounted on the fork-shaped portion so as to be adjustable by

report to this one.

  Conveniently, the device comprises a knife portion integral with the ejector portion. The invention also relates to a machine for baling crop products such as fodder or straw, comprising a knotting mechanism which comprises a knife arm of the type mentioned.

above.

  The following description, made with regard to

  appended drawing, given in a non-limiting way, will allow

to better understand the invention.

  Fig. 1 is an exploded perspective view

  a knife arm according to the invention.

  Fig. 2 shows the arm visible in FIG. 1 in its working position, this arm then forming part of the knotting mechanism (visible only from

  partial way) of a baler.

  Fig. 3 shows a more complete part of the

knotter mechanism.

  With particular reference to FIG. 1, it can be seen that the support arm 10 comprises two parts, one of which is a fork-shaped part 12, while the other is an ejector-forming part 14. The fork-shaped part 12 comprises two branches 16, 18 of conventional form, between which the binding string must be received and guided, and a base 20 which joins the two branches. The right side of this base (when looking at Fig. 1) is provided with an upwardly directed flange 22, in which two threaded holes 24 are provided. The fork-shaped portion 12 may be constituted by a piece of foundry or

  a piece of forge and thus forms a very resistant element

  As. The ejector portion 14 is made of hardened steel and includes an actual ejector 26, which is aligned with the rim 22, and a knife 28.

.: 2475349

  integral with this ejector 26. The knife 28 is in a plane substantially perpendicular to the plane of

  the ejector 26 so as to align with the lower edge

  laughter (when looking at Fig. 1> of the base 20.

  The ejector 26 comprises two upwardly directed adjusting slots 30 corresponding to the tapped holes 24 of the

  fork-shaped part 12, but the profile of the

  jector 26 is conventional and has an edge provided with

of a curved depression 32.

  The ejector portion 14 is removably attached

  on the fork-shaped portion 12 by means of two screws 34 whose rods pass freely through the slots 30 and are screwed into the holes 24, so that

  that the parts 12 and 14 are made solidary, the ejec-

  26 covering the flange 22 and the knife 28

  along the lower edge of the base 20. The ejector portion 14 is adjustable by movement towards the

  up or down when the screws 34 are loosened.

  Pins or pins can of course be used

instead of screws 34.

  Referring now to FIG. 2, it can be seen that the load bearing arm 10 is mounted in the immediate vicinity of a knotter nose or a conventional gripper 36,

  provided with a tongue 38 and a nose portion 40.

  The edge 32 of the ejector 26 is centered relative to the

  lower portion 42 of the tongue 38 with a maximum clearance of

  2.4 mm for the smallest distance between the tongue 38 and the ejector 26 during the movement of

this tongue.

  In the case of the conventional monoblock knife-holder arm described above, it is necessary to "shape" or bend the arm, for example in its ejector-forming part, to align it correctly

  with the beak. On the other hand, in the case of the method of

  According to the invention, alignment is achieved as previously indicated by adjusting the elector portion 14 on the screws 34, so that the fork-shaped portion 12 and the ejector portion 14 can be made of a strong material. , given

  they do not need to be deformed in service.

  The operation of the knotter mechanism to tie the string around a bale of fodder or straw is quite conventional and it will be described accordingly only briefly. The related figure

is Fig. 3.

  A needle 44 of the knotter mechanism receives the

  twine 46 contained in the twine box (not shown

  sented). The working end of the string is held in a string holder 48 by the holder, and the string passes through the fork-shaped portion, between the legs 16 and 18, and on the upper portion of a bale. .When the ball is formed, she

  applies against string 46 which extends over his

  jet and thus pulls a plus, long string length to

  from the string boot. When the bullet 52 reaches

  a predetermined length, a measuring wheel (not shown) triggers the knotter mechanism and the needle 44 brings (with the help of a gripper finger) a second strand of string from the bottom, to pass it around the end rear of the ball 52, through the fork-shaped portion 12, on the nose or the gripper 36, and

  to make it penetrate the string holder 48.

  This disc 48 then undergoes angular displacement sufficient to allow the retainer 50 to immobilize the two strands of the string in the disc, and the beak

  or the clamp 36 begins to rotate. This rotation provoked

  that the formation of a loop of string around the beak

  and this one flips upwards away from the lan-

  watch 38, so that an open jaw is formed to receive the string. The device 10 then moves so that the knife 28 advances to the touch of the string to cut it. The jaw of

  the clamp closes and tightly holds the ends

  put away from the string. This corresponds to the stage shown in FIG. 3. During a new movement of the device, the portion 14 pushes or ejects the string forming a loop away from the clamp 36, the two ends

  cut from the string being maintained so as to pre-

  parry the formation of the knot. The knot is formed and escapes the clamp 36 by the ejection effect by

  sweeping, and this completes the binding of the ball 52.

  Modifications may be made to the described embodiment, in the field of equiva-

  technical differences without departing from the invention.

Claims (6)

  1.- Knife arm for a knotter press mechanism for baling crop products such as fodder or straw, provided with a fork-shaped portion for receiving and guiding the twine or the like and an ejector portion, characterized in that said ejector portion is mounted on the fork-shaped portion so as to be able to undergo adjustment movement by report to this one.   2.- knife arm according to claim   1, characterized in that the common elector portion   takes adjustment slits and is fixed on the part in   fork shape by locking screws or pins   passing through these adjustment slots.   3. A knife arm according to claim 1 or 2, characterized in that a knife portion   is integral with the ejector portion.   4.- Cutter arm according to any one of   of the preceding claims, characterized in that the   fork-shaped part is constituted by a piece   foundry or plain piece of forge.   5.- Cutter arm according to any one of   of the preceding claims, characterized in that the   ejector portion is made of hardened steel.   6.- Press for the baling of products   harvesting, in particular fodder or straw,   in that it includes a knotter mechanism   a knife arm according to any one of preceding claims.