US2921611A

US2921611A - Filling holding and cutting mechanism for looms

Info

Publication number: US2921611A
Application number: US724687A
Authority: US
Inventors: Walter J Budzyna; Jr Ralph H Brown
Original assignee: Draper Corp
Current assignee: Draper Corp
Priority date: 1958-03-28
Filing date: 1958-03-28
Publication date: 1960-01-19
Anticipated expiration: 1977-01-19

Description

Jan. 19, 1960 w. J. BUDZYNA ETAL 2,921,611

FILLING HOLDING AND CUTTING MECHANISM FOR LOOMS Filed March 28, 1958 INVENTORS 50 WALTER J. BUDZYNA RALPH H. BROWN, IR.

A TTORNE Y United States Patent FILLING HOLDING AND CUTTING MECHANISM FOR LOOMS This invention pertains to certain improvements in a type of combined filling holding and cutting mechanism 1 for use particularly in shuttleless looms, and is directed more especially to an improved mounting arrangement in such mechanism of the combined movable binder and cutter blade and a novel spring means operable there- The present invention is concerned particularly with improvements in a type of combined filling binder and cutter mechanism such as, for example, disclosed in US, Patent No. 2,604,123 granted July 22, 1952. This prior binder-cutter mechanism embodies in its structure a reciprocable plate-like cutter blade which functions between cutter and binder plates arranged side by side in opposed spaced relation on a fixed supporting member and pressed toward engagement with the reciprocable cutter member.

It is a general object of the invention to simplify and improve the mounting for the movable binder and cutter sblade element in filling thread holding and cutting mecha- :nisms of the type above-described and to alter it in a man- :ner so as to enable it to be self-aligning and thereby more effectively accomplish its intended purpose and in- :sure proper functioning and shearing action with the cooperating ledger blade.

It is a further object of the invention to provide resilient biasing means effective primarily for moving the binder and cutter blade throughout its operative stroke and at the same time for applying to this blade lateral pressure essential for effecting its cutting function.

Other and additional objects of the invention will be apparent from the following more detailed description.

The invention will be described, hereinafter, in greater detailby reference to the accompanying figures of drawing, wherein:

Fig. 1 is a top plan view of a filling binding and cutting mechanism constructed in accordance with the invention;

Fig. 2 is a side elevational view taken substantially on the line 22 of Fig. 1, looking in the direction of the arrows;

Fig. 3 is a fragmentary bottom plan view taken substantially on the line 3--3 of Fig. 2 looking in the direction of the arrows, and showing the movable binder and cutter blade in closed shearing position.

Fig. 4 is a similar view to Fig. 3 but showing the movable binder and cutter blade shifted into open position preparatory to receiving a fillingthread;

Fig. 5 is a detail view, in section, taken substantially on the line 55 of Fig. 1, looking in the direction of the arrows, and

Fig. 6 is a pictorial view of a detail of the cross-head with the movable cutter blade attached.

Now referring to Figs. 1 and 2 of the drawings, reference numeral 10 generally designates the combined binder and cutter mechanism constructed in accordance I with the invention and there shown comprises a movable binder and cutter blade element 12 which is mounted onan elongated arm or bracket 13 having a flared ice :arm portion 14 at one end and suitably adapted at its other end (not shown) for attachment by bolts or screws to the side of a casing (not shown) that forms the lower support member for the cam and tappet mechanism of the filling motion disclosed and described in US. Patent No. 2,604,123 above-mentioned. The arm 13 has cast,

or otherwise formed as a part thereof at two spaced locations along its longitudinal extent the

elongated lugs

15 and 16 which project outwardly from and are pershown), as disclosed in US. Patent No. 2,604,123, and

is retracted in the opposite direction by means of the expansion coil spring 20 which encircles the rod 17 and has its opposite ends bearing against and restrained in the lug 16 and a collar 21. This collar is adjustably set in a desired position along the rod 17, as by a set screw 22. The outward extension 18 of the rod 17 is of reduced diameter and has mounted thereon a cross-head 23 formed with a sleeve-like hub 24 which is firmly clamped against the shoulder formed at the junction of this reduced extension of the rod with the main body thereof by a lock washer 25 and a nut 26. As illustrated in Fig.

, 24 and substantially co-extensive therewith.

The fixed part of the cutter is attached at one end by screws 34 to the inner flat side face 35, Fig. 2, of a depending flat projection 36 integral with the underside of the arm 13, and comprises a binder plate 3.7 and a spring 38, each of sheet spring steel, see Figs. 3 and 4, and'an opposed spaced ledger blade 39. As shown, the spring 38 is spaced from the binder plate 37 except at its end where it makes pressure contact with the plate. This 1 pressure may be varied in a manner to be described. The

movable cutter blade 12 functions in the space between the ledger blade 39 and the oppositely disposed binder plate 37 so as to sever a filling thread positioned in an opening designated by reference numeral 40, 'Fig. 4, while the rod 17 at this time is pushed by the cam mechanism of the filling motion of the above-identified'patent to the left, Figs. 2 and 3, against the normal expansive action of the compressed spring 20. As illustrated in Fig. 2, the end turns of the spring 20 are bent linearly, as indicated at 41 and 42 and these extensions are directed in opposite directions longitudinally of the spring and are inserted into suitable drilled holes, as indicated at 44 and 45, respectively, Figs. 1 and 4, in the lug 16 and the collar 21 which is locked by means of the set screw 22 to the rod 17. Thus, the spring 20 has its end 44 restrained in the lug 16 and its end 45 similarly restrained in the collar 21. Consequently, the torsional effect of the spring 20 is determined by the adjusted rotative setting of the collar 21 on' the rod 17. When properly set, the torsional force of this spring acts through collar 21 to turn the rod 17 in its hearings in the

lugs

15 and 16 along with the cross-head 23 and in a direction to press the attached movable cutter blade 12 laterally against the ledger blade 39. By properly adjusting the collar 21 angularly, the torsion in spring 20 may be set for that shearing, pressure best suited to the particular material 3 at hand. The movable cutter blade 12 is attached at one end by two

shoulder bolts

48, 49 and

nuts

50, 51, respectively, to the inner flat surface of the plate 33. As an alternative, ordinary bolts may be used in which case sleeves. are employed rather than the shouldered part of the bolts. The length of the plain

cylindrical portions

52 and 53 of the shanks of such bolts or the length of thesleeves is such as to permit free but limited sliding or floating movement of the cutter blade 12 thereon thus enabling this blade member to aline itself automatically laterally and vertically with respect to ledger blade 39 whereby their interfaces will match uniformly and proper and effective shearing action will be assured at all times. Preferably the openings in the blade are considerably larger than that part of the bolt or sleeve over which they fit in order to give added adaptation to alignment.

The movable blade 12 has a projecting part indicated by the reference numeral 55, Figs. 4 and 6, and this projection always will be entered between the ledger blade 39 and the binder plate 37. This plate companion spring is pressed against the adjacent movable cutter blade 12 by means of spring 38engaged by a set screw 56 which is adjustable in the end of a lug 57 integral with the elongated lug 16 and disposed perpendicular thereto. A look nut 58 secures the set screw 56 in its adjusted setting.

As seen in Figs. 1, 2 and 3, the lug 16 carries near its free end an upright pivot pin 60 on which is pivotally mounted a two-armed lever 61 one arm 62 of which is formed at its outer end with an enlargement 63 having an arcuate surface 64 which is engaged by the end face 65 of a short bar-like extension 66. This extension may be an integral part of the arm 27 of the cross-head 23 or it may be a separate element as here shown and rigidly aflixed thereto as by nut 67 having screw-threaded connection with a threaded stem portion of the bar 66 that passes through a drilled hole in the arm 27. In either instance, the disposition of the bar extension 66.is at right angles to the arm 27 and also in an overlying relationship to the rod'17. A coil tension spring 70 interposed, in a tensioned state, between the end portion of the arm 62 and the bar extension 66 and having its terminal end coils secured over

upright pins

71 and 72 fixed in the bar extension 66 and the end portion of arm 62, respectively, serves to maintain the

surfaces

64 and 65 in operative pressure engagement whereby as the crosshead 23 is reciprocated by the rod 17 corresponding pivotal movements are imparted to the two-armed lever 61. The second arm 74 of this lever extends in a downwardly inclined direction and carries at its outer end extremity an eyelet 75, Fig. 3, through which the filling is threaded to be controlled in a known manner.

It now will be apparent from the foregoing description that the improved structural arrangement of the movable cutter blade with respect to the fixed cutter blade member in accordance with the instant invention, has several advantages over the prior structure disclosed in US. Patent No. 2,604,123 in that in the present device the sliding movement of the movable cutter blade occurs simultaneously along and against a substantial portion of the flat surfaces of the binder plate 37 and the ledger blade 39, as distinguished from the narrow point contact made by the bent tip only of the binder member of the device of the patent above-mentioned with the engaged side of the cooperating movable cutter blade member of such prior device. Also, the degree of fiexure of the binder plate 37 may be regulated as desired by appropriate adjustment of the set screw 56 whose mounting is in a fixed part of the bracket 13.

Again, the dual function of the spring 20 makes possible a very simple structure in which the spring not only effects the cutting stroke of the parts, but also'acts at all times to provide the required lateral shearing pressure. The universal or self-aligning mounting of the movable blade in turn makes possible the use of such a spring while retaining the ultimate in cutting efficiency at the blade members themselves.

While springs of a definite type have been described by way of example, it is to be understood that other and equivalent types of resilient means may be utilized.

While one embodiment of the invention has been disclosed, it is to be understood that the inventive concept may be carried out in a number of ways. The invention is, therefore, not to be limited to the precise details described, but is intended to embrace all variations and modifications thereof falling within the spirit of the invention and the scope of the appended claims.

What is claimed is:

1. In a filling thread holding and cutting mechanism for textile machines, the combination of a fixed cutter blade, a movable cutter blade, a movable carrier for supporting the movable cutter blade and by means of which that blade member is moved to and from the fixed cutter blade to effect severing of a filling thread, a resiliently applied biasing means effective to apply pressure against the movable cutter blade to urge it laterally toward and press it firmly against the fixed cutter blade,

.and means by which the movable cutter is retained on said movable carrier, said last-named means providing forbodily movement of said movable cutter blade member laterally on said carrier relative to the fixed cutter blade member to assure uniform alignment and proper and effective shearing action at all times with said fixed cutter blade member while held in pressure engagement therewith by said biasing means.

2. In a filling thread holding and cutting mechanism for texile machines, the combination of a fixed cutter blade, a movable cutter blade in engagement therewith, a longitudinally movable carrier for supporting the movable cutter blade and by means of which thatblade member is moved to and from the fixed cutter blade to effect severing of a filling thread, a resilient biasing means operatively arranged for imparting and maintaining lateral pressure engagement between the movable and fixed cutter blades, and means by which the movable cutter blade is retained on said longitudinally movable carrier, said last-named means providing for bodily movement of said movable cutter blade member laterally relative to its supporting carrier to assure uniform alignment and proper and effective shearing action at all times with said fixed cutter blade member while held in pressure engagement therewith by said biasing means.

3. A filling thread holding and cutting mechanism for textile machines comprising, in combination, a fixed cutter blade, a movable cutter blade in engagement therewith, a reciprocable carrier for supporting the movable cutter blade and including a sliding rod member on which said carrier is mounted and by means of which said blade member is moved toward and from said fixed cutter blade to effect severing of a filling thread, a resilient biasing means connected to said rod member for imparting to it and said carrier a biasing torque for urging the movable cutter blade toward and to press it against the fixed cutter blade, and means by which the movable cutter blade is retained in a floating fashion on said reciprocable carrier, said last-named means providing for limited bodily movement of said movable cutter blade laterally relative to its supporting carrier whereby automatic and uniform alignment is effected between the engaged cutter blades and proper and effective shearing action therebetween will be assured at all times. 7

4. Mechanism as defined in claim 3 and further characterized in that the retention means by which the movable cutter blade is held to the reciprocable carrier member consists of a plurality of shouldered screw fasteners on the shouldered portions of which the attached cutter blade member has free but limited sliding movement for self-adjustment laterally. I

5. In a filling thread holding and cutting mechanism for textile machines comp is ng i ter n t on, a ixe cutter blade, a movable cutter blade in engagement therewith, a reciprocable carrier for supporting the movable cutter blade and including a sliding rod member on which said carrier is mounted and by means of which it and said cutter blade member are moved toward and from the fixed cutter blade to effect severing of a filling thread, resilient biasing means connected to said rod member for imparting to it and said carrier a biasing torque for urging the movable cutter blade toward and to press it against the fixed cutter blade, said resilient biasing means comprising a torsion expansion coil spring one end of which is fixed and the other end being connected to said rod member through a collar element adjustably secured thereto thereby to transmit thereto the torsional action of said spring to turn said rod and carrier with its cut ter blade member to bias the latter laterally into pressure engagement with the fixed cutter blade, the expansive action of said spring being eiTective to move said carrier together with its cutter blade member into a retracted position relative to the fixed cutter blade, and means by which the movable cutter blade is sustained in a floating fashion on said reciprocable carrier, said last-named means providing for bodily movement of said movable cutter blade laterally relative to its supporting carrier whereby automatic and uniform alignment is effected between the engaged cutter blades and proper and effective shearing action therebetween will be assured at all times.

6. In a thread holding and cutting mechanism for textile machines, the combination of a bracket, projecting guides rigid with said bracket, a rod member extending through and beyond said guides and being longitudinally slidable therein, a cross-head fixed to one extended portion of said rod member, a fixed cutter blade member, a movable cutter blade member in operative engagement therewith and attached to said cross-head so as to be capable of limited lateral bodily movement thereon, resilient biasing means connected to said rod member for imparting to it and said cross-head a biasing torque for urging the movable cutter blade toward and pressing it firmly against the fixed cutter blade member, said resilient biasing means comprising a torsion coil spring encircling said rod member, one end of said spring being fixed to one of said guide projections and the other end being connected to said rod member through a collar element adjustable set thereon to place said spring under a desired degree of initial torsion whereby the torsional action of said spring will be transmitted through said collar to turn said rod member and said cross-head together with the movable cutter blade to bias the latter laterally into sidewise pressure engagement with the fixed cutter blade, flexible binder means overlying the cutter side face of said movable cutter blade member and fixed- 13 secured in opposed spaced relation to said fixed cutter blade member, and adjustable means for effecting a desired degree of flexure to said binder means.

7. in a filling thread binder and cutter for looms having a ledger blade, an opposed binder member spring pressed toward said ledger blade and a movable cutter and binder member slidable between said ledger blade and binder member, a swinging support means by which said movable cutter and binder member is carried, resilient means for biasing said support means toward one of its extreme positions, said resilient means being further stressed to press said movable blade into shearing contact with said ledger blade, and a connecting means between said support and movable cutter and binder member comprising a floating mounting.

8. In a filling thread binder and cutter for looms having a ledger blade, an opposed binder member spring pressed toward said ledger blade and a movable cutter and binder member slidable between said ledger blade and binder member, a swinging support means movable longitudinally by which said movable cutter and binder is carried, a spring stressed both lengthwise and torsionally for moving said support and movable cutter and binder member to a cutting and filling binding relationship and for swinging said support to develop lateral shearing pressure between the said cutter blade and ledger blade, and a connecting means between said support and movable cutter and binder member comprising a floating mounting.

9. Mechanism as defined in claim 8 wherein said floating mounting comprises headed bolt means projecting from said support and means defining holes in said cutter and binder member, the relative lengths and diameters of said bolt means and holes being such that substantial clearances are provided.

References Cited in the file of this patent UNITED STATES PATENTS 2,106,727 Drobile Feb. 1, 1938 2,553,351 Belotti May 15, 1951 2,604,123 Budzyna et al July 22, 1952 2,654,399 Berry et a1. Oct. 6, 1953 2,665,716 Budzyna et a1. Jan. 12, 1954 2,711,193 Consoletti June 21, 1955 2,720,225 Moon Oct. 11, 1955 2,752,955 Consoletti July 3, 1956