US1929347A - Automatic fastening apparatus which tautens, fastens, and cuts the wire in one sole operation - Google Patents

Description

1933- M. BUSTINDUY ET AL 1,929,347

AUTOMATIC FASTENING APPARATUS WHICH TAUTENS, FASTENS,

AND CUTS THE WIRE IN ONE SOLE OPERATION Filed May 9, 1930 3 Sheets-Sheet l Pkg Oct. 3, 1933. BU5T|NDUY ET AL 1,929,347

AUTOMATIC FASTENING APPARATUS WHICH TAUTENS, FASTENS,

AND CUTS THE WIRE IN ONE SOLE OPERATION Filed May 9, 1930 3 Sheets-Sheet 2 Oct. 3, 1933. M. BUSTINDUY El AL 1,929,347 1 AUTOMATIC FASTENING APPARATUS WHICH TAUTENS, FASTENS,

AND CUTS THE WIRE IN ONE SOLE OPERATION Filed May 9, 1930 3 Sheets-Sheet 3 Patented Oct. 3, 1933 1 UNITED s'm'rasv AUTOMATIC FASTENING A P P A R A T U S WHICH TAUTENS, FASTENS, AND CUTS THE'WIRE IN ONE SOLE OPERATION Moiss Bnstinduy Application May and 7' Claims.

The invention relates to an improved machine for fastening by means ofwire, which, with an extremely simple mechanism, enables the different operations of stretching, twisting and cutting the wire to be unified in one working cycle requiring a single operation which can be performed in a few seconds. Various machines of this kind are already known the working of which provides for the tautening of the wire on the case or bundle to be fastened, the twisting and cutting of the wire, but in separate operations. That is to say, first the tautening has to be done with the aid of traction racks or rollers, in which the wire is subject of the present invention consist in the following factsa- I I V (1) Wire of anytype of thickness may be used, taken straight from a roll, without requiring to be cut beforehand.

(2) Extreme simplicity of the mechanism.

(3) All the operations are effectedby one movement to and fro of a single lever, thus minimizing the time and labor, required for working.

To enable theapparatus to be thoroughly understood, it is described hereunder with reference to the drawings attached hereto, in which Fig. 1 is a side View of the fastening machine shown placed .on a case to be fastened.

Fig; 2 is a similar view to that of-Fig.1, showing the operation of the machine for stretching the wire. 7 Y

Fig. 3 shows the plaiting of the wire as effected .45 by the machine.

1 Fig. 4 is -a view ofthe back of the machine.

Figs. 5, 6, "I, 8 and 9 represent various sections of the machineyshowing details of its'mechanisn andmanner 'of,working.

- Aswill be seen from these drawings, the machine is composed of thefollowing partsz A sole 1, forming the base of the mechanism and supporting all its parts, is provided with two lugs 2, fitted on either sideof the sole near. its centre, which lugs carry a fixed horizontal shaft and Jos Antonio Bergareche, Eibar, Spain 9, 1930, Serial No. 451,132, in Spain May 13, 1929 The advantages of the apparatus forming the vmally raised.

3, on which are fitted, independently ofone-another, the three following pieces:-the spur-pin ion 4 spiral gear 5 andhub 6 oftheswinging arm or lever 35. v r The sole 1 is provided lengthwise witharctangular body 7, the inside of which is hollowed throughout its length so as to take a rack 8 which slides in the hollow space and engageswith the pinion 4. Inthe'bottom of the hollow space is a rod 9 fitted with two spiral-springs 10 and 11. On-this rod slides a stop 12, which is solid with the. rack and is actedon by the springs '10 and 11, transmitting their'action to the rack, as will be explained when dealing with the operation of the apparatus (Fig; 4). I I r At the left end of the'rack a clamp is provided for holding the end of the wire that is to be out, which clamp is composed of a lever l3-having a toothed cam head and of a small block, also toothed, between which the wire is gripped fast in the manner shown in Fig 2. The tensile strain of the wire itself causes the latter to-fit tightly into the indentation 15, thus strengthening the grip.

On the right hand side of the sole a similar clamp 16 is provided, symmetrical and identical in working with the other clamp, and gripping the free end of the wire. The lever 1'7, of this clamp in its turn operates a small lever-18, which serves'as a stop retaining the wire and preventing its displacement when-it is being stretched and its twisting is begun. Lever 18 is mounted freely on its pivot and when lever 17 israised it raises 18 by its action on the latters projecting part-18. On the other hand-when lever 17 is lowered and the wire is secured, lever 18 falls under its own weight and its projecting 'part-18" comes to lie in front of the wire as shown in, Figure 2 of the drawings, and prevents this wire from slipping outof the position in which it is secured, under the twisting effort.

7 On a projection 19 of the body of the base 1 and fitted on a shaft 20 is a retention tooth-21, which is held constantly on the rack by the spring A knife 23 oscillating ona shaft 24 screwed to the transverse projection-25 of the left hand rear part of base 1, serves for cutting the wiren-"This knife of special shape (see particularly Figs, 8 and 9) hasits stroke limited by a pin 26' whieh passes through it by an opening 27 made near the cutting edge 28;"the spiralspring- 29 resting underneath on the base 1 keeps the knife 23 nor- In the upper part of the knife 23, on

the side no,

15. shaft 40 fixed to one side of the lever 35. Another catch 41 projects from that. side andmoves' the. tautening tooth 42, which swings on shaft 43,

mally held off or upwards by a spring 37, but can be brought into action downwards by pressing on'a knob 38 provided on the rod. This rod 36 operates a catch '39 swinging on tooth projects on the'opposite sideand, at the end of the stroke of the lever, bears upon pin 30.

The .tautening" toothnproper; is formed of the point 42, whichengageswith the teeth of pinion 4. A spring 46 holds thetautening tooth 42 in engagement with the pinion 4. On the side of the lever 35 that is opposite and parallel to; the one occupiedby the tautening tooth '42, and mounted on shaft 43f is the dra ging tooth 34, which, by engaging its point 34 in the recesses of the spiral gear 5 causes the latter to move when required. A tail 41 0f this tooth is tripped by the catch 39 so that, whenthe rod 36 is pressed down, the point 34 of, tooth 34iswithdrawn from the recesses 33 and the gear 5 released. f

Geared with the underside of the spiral gear is a pinion48 intersected in an axial direction by a groove 49 housing the I wires, When the ,latter are-being interlaced, this pinionexertsastrong effort on its right end under the thrust of the spiral teeth. To minimize friction a ball bearing, 50, shown in Fig. 5, is provided at this end, which preventsthe wear andwedgingefiect that would otherwise be produced. r y

, The working of the apparatus is as follows {Ihe apparatus, as shown in Fig. l,is placedon thepackageC that is to be fastened. The free end of the wire is gripped by'the leverand clamp 1617.; The wire is then passed through the groove 49 of pinion 48, is led around the package, and is again passed through groove 49 alongside the former strand of wire, whereupon it is gripped by the lever and clamp 13-' l4' oi the rack. The .wire is not cut, but isleft hanging from the roll. '1 The apparatus being in this position, as shown by Fig. 1, steps are taken to tauten the wire, for

which purpose the lever 35 is turned over an'arc of .a circle, as shown'in Fig. 2. Inthe course of this operation of the lever35, the tautening tooth -42 carries the pinion 4 with it, aszits point is engaged between two teeth of the pinion bythe action of spring 46 .(Fig. 4). As the'pinion' 4 engages with rack 8, the latter is forced to move in the guideway inthe base 1, and the end of the wire .that is gripped by the clamp 14 and thus I moveswith the rack is'forced to exert an effort lever through an angle of 180, the latter need only be returned to its original position and the operation repeated. This is rendered possible by the retaining tooth 21, which holds the rack 8 in any of its positions (see Fig. 2) and maintains the tension until the displacement of the rack is increased by the fresh operation just mentioned.

Provision has also been made for the possibility that the wire, both when being tautened and later when being twisted, may leave its and the lever 35 has been brought to its extreme position on the right of the apparatus, as shown by the dottedlline'in Fig. 2, the tooth 34 under actionof its spring 52 causes its point 34 to enter recess 33 in the spiral gear 5.

Thereby, on again moving the lever 35 to its original position,. shown Fig; l the lever will carry the spiral gear 5 with it, causing it to. make hall a turn. The spiralpinion 48' g ears .with

the wheel 5 underneath the samesthe number ofits teeth being chosen so that during half a revolution of the wheel 5 it makesan exact num% ber of revolutions so as to leave its, channel 49,

atthe end of those revolutions, exactly coincid ing with-.thegroove by whichthe wire is introduced' and. the latter canbe withdrawn fro m inside the pinion. 7 r V f When this pinion 48 turns, thetwo strands of wire, introduced intoitschannel 49 and so arranged thatthe axis of rotation intersects them by half (see Fig. 1), are forced to twist round one another, forming twoi spiral knots of opposite pitches, which constitutes a perfecttype of fastoning, obtained without any foreign elements,

the two ends of the wire are, as it were, 'soldered together and it is impossible for them to slip. Fig. 3 shows the interlacingof the wire effected'by the machine. 5 l Z ,The end of the operation is constituted by the automatic cutting or the wire and the likewise automatic return of the rack 8 to its position of rest. For carrying out these two operations the following mechanism is prcividedz-When' lever 35 reachesth'e position shown in Fig; 1' (see this figure and particularly Fig; 4) ,i'the wire has already been interlaced and, accordingly, the rack can return to its original position, for whichpurpose tooth 42holding pinion 4 and tooth 21 holding the rack 8 must be released. On the upper part of. knife 23 a pin 30 is provided, which, on striking point 45 of tooth 42 disengages this tooth from the pinion.4 almos t at the same time as the stop 53 on the lever 35 raises tooth 2101f the rack by pressing on its opposite end and oblig'ing it to swing up on its shaft 20. The rack, being thus free to re-enterthe base 1,,doesso rapidly under effect of the spring 11. ,To preventexc'essive blows on the return of the rack,a spring 10 is provided to deaden the shock.

V, Simultaneously the lever 35 presses on r the upper part of the knife 23 (Fig. 9) ,causi'ng it to swing on its 'shaft24and cut, with .its edge-2 8, the-front wire lying in the groove, i. e. the part of the wire attached to the-roll. A spring 29, fitted on the knife, raises the miter when thje lever no longer acts on it, thus allowing the'wire to be withdrawn from'finside the apparatus. lTo allow of an exact coincidence of the channel of the spiral pinion and thegroove, in the basethrough which grooves the wire has to pass inorder to, withdraw the machine after the mstening has been effected, a pin is provided which, at the end of the stroke, enters into the notch 32 on the spiral gear-wheel 5, under action of spring 31.

Also, on the operating lever 35 a rod 36 is provided, which, when acted on by the knob 38, moves and release the spur pinion 4' and spiral gear 5,

so as to be able to move the lever 35 without its performing any work. This movement is necessary, for example, when the tension first given to the wire is not suiiicient and the wire requires to be drawn tauter, as for thatpurpose the lever 35 I has to be returned to its initial position without taking the spiral gear with it as, otherwise, this latter wheel would turn and cause the wire to be 1. In apparatus for wiring cases, bales andthe like, means for tensioning the wire, means for twisting the wire, means for cutting the wire, and

a single lever and means associated therewith for actuating the tensioning,. twisting and cutting means, said tensioning means including a longitudinally movable rack bar having wire gripping means and a pinion engaging said rack bar; said twisting means including a revoluble element and a gear wheel geared thereto and said lever being provided with means for successively operating the gear wheel, the pinion and the cutting means.

2. Apparatus as claimed in claim 1, in which the tensioning means comprises a longitudinally movable rack bar having wiregripping means and a pinion engaging said rack bar; the twisting means includes a revoluble wire twisting element and the gear wheel engaged therewith and in which the lever is provided with means to impart intermittent rotation successively to the pinion and the gear wheel according to the direction of movement of the lever and in which the lever is also provided with means for actuating the cutting means. v

3. Apparatus as claimed in claim 1, in which the tensioning means comprising a longitudinally movable rack bar having wire gripping means and a pinion engaging said rack bar; the twisting means includes a revoluble wire twisting element and the gear wheel engaged therewith and in which the lever is provided with means to impart intermittent rotation successively to the pinion and the gear wheel according to the direction of ting means and in which the cutter is a movable.

knife arranged for operation by a lever at the conclusion of the operation of the twisting means. the catches 39 and 41, obliging them to swing Y 4. Apparatus asv claimed in claim 1, in which the tensioning means comprises a longitudinally and the gear wheel engaged therewith and in which the lever is provided with means to impart intermittent rotation successively to the pinion v and the gear wheel according to the direction of movement of thelever and in which the lever is also provided with means for actuating the cutting means and in which the lever has pawls for respectively engaging the pinion and the twisting gear and means for operating said pawls.

5. Apparatus asclaimed in claim 1, in which the tensioning means includes a longitudinally movable rack bar having wire gripping means and a pinion engaging said rack bar; in whichthe twisting means includes a revoluble element and V a gear wheel geared thereto and in which the lever is provided with means for successively operating the gear wheel, the pinion and the cutting means,

and a stop element to hold the rackbar against casual reverse movement while the wire is tensioned. l

6. Apparatus as claimed in claim 1, in which the tensioning means includes a longitudinally movable rack bar having wire gripping means and a pinion engaging said rack bar; in which the twisting means includes a revoluble element and a gear wheel gearedthereto and in which the lever, is provided with means for successively operating'the gear wheel, thepinion and the cutting means provided with a longitudinal groove open at one side thereof for the reception of the wire.

7. Apparatus as claimed in claim 1, in which the tensioningv means includes alongitudinally movable rack bar having wire gripping means and a pinion engaging said rack bar; in which the twisting means includes a revoluble element and a gear wheel geared thereto and'in which the lever is provided with means for successively operating the gear wheel, the pinion andthe cutting means provided with a longitudinal groove open at one side thereof for the reception 'of the wire and also includes means to prevent casual disengagement of the wire from said groove.

orsiis BUS 'I-INDUY. Josfi: ANTONIO BERGARECHE.

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