US2274140A - Eyeleting machine - Google Patents

Description

Feb. 24, 1942. s. L. GOOKIN 2,274,140

EYELETING MACHINE Filed April 2, 194]. 3 Sheets-Sheet Patented Feb. 24, 1942 UNITED STATES PATENT OFFICE 2,274,140 v EYELETING MACHINE Sylvester L. Gookin, Quincy, Mass, assigno'r to United Shoe Machinery Corporation, Flemington,'N. J a corporation of New Jersey Application April 2, 1941, Serial No. 386,482

4 Claims.

This invention relatesgto eyelet-inserting machines and is concerned chiefly with a motion for operating both an eyelet-inserting tool and a raceway by which eyelets are presented to the spindle of the inserting tool.

One of the requirements in all types of eyeletinserting machines in which the eyeletsare supplied automatically to an eyelet-inserting tool by a raceway is a raceway-operating mechanism that will postpone placing the delivery end of the raceway in the path of that tool until the latter has been retracted far enough to avoid interference. I

To satisfy the. timing requirements of the elements the more costly eyeleting machines are provided with operating cams, levers and links that have no duty other thanto reciprocate the raceways.- n the other hand, some less costly machines have been developed to utilize the reciprocatory motions of the eyelet-inserting tool to operate the raceway, but those machines require supplemental means to postpone the strokes of the raceway with respect to the strokes of the eyelet-inserting tool, because if the strokes of those two elements were synchronized the tool would be unable to pick an eyelet from the raceway at one stage of a cycle and to avoid interference with the raceway at a later stage.

With these conditions in View, an object of the present invention is to provide an improved and simplified eyelet-inserting machine" in which the mechanism for reciprocating the eyelet-inserting tool will also reciprocate a raceway with the necessary lag in timing but without any supplemental means to produce such a, lag.

The improved operating mechanism includes a crank and a pitman by which the eyelet-inserting tool is reciprocated with a simple rectilinear motion. It also includes. a link by which motion is communicated from the pitman to the raceway, and herein lies the solution of the timing problem.

A pitman receives twokinds of motion from a crank, viz., amotion of translation and angular motion about a'wrist-pin but onlythe first of 'these is utilized to operate the eyelet-inserting tool. Moreover, the angular motion has its greatest amplitude when the motion-of translation has The invention utilizes both kinds of motion of the pitman to operate the race- .its least amplitude.

way, and the partsthat cooperate for this purpose are so related as to utilize the angular movements of the pitman to continue thestrokes of the raceway beyond the p ints atwhich thereversals of direction occur in the movements of translation. Thus, the angular motions throw the strokes of the raceway out of synchronism with the strokes of the eyelet-inserting tool by producing a lag in the movement of the raceway. This lag enables the spindle to pick an eyelet from the raceway at one stage and enables the raceway to avoid interference with the inserting tool ata later stage.

Referring to the drawings,

Fig. llis a front elevation of an eyelet-inserting machine vembodying the present invention, the partsbeing represented in their initial positions; Fig. 2 is a front elevation of some of the elements appearing in Fig. l, but in Fig. '2 the operating shaft has been turned about 25 from its initial position and the eyelet-inserting tool is about to enter an eyelet in the raceway;

Fig. 3 is a front elevation partly in section of the parts included in Fig. 2, but in Fig. 3 the operating shaft has turned about 35 from its initial position and the spindle of theeyelet-insertshaft of the machine is operated; and

Fig.7 is a, "sectional view of the starting-andstopping mechanism, the section being indicated byline VIE-,V'II in Fig. 6, and the direction of the view being from the rear toward the front of the machine. I

. Referring to Figs. 1,2, and 3, the eyelet-insert-- ing tool comprises a pressure-applying member In and a spindle H extending through and projecting from a central bore in the member [0.

'The member ID is affixed to a plunger I 2 by a set-screw I3, the plunger having a socket to receive the shank of the member 10 andvto Yen close a compression spring 14 and a follower by which the spindle H is normally'projected. A head [5 formed on theupper end of the spindle II is initially seated against the upper end of the member ID by the spring I4.

A stationary tool l&.located inalignment with the tool In is secured in a horn I! of the frame I8 and is provided with an upsetting shoulder I9 against which the eyelets are driven by the tool [0. A central pilot 2!] projecting upwardly from the shoulder I9 is adapted first to locate a previously formed eyelet-receiving hole in a workpiece in the desired position, thereafter to guide the barrel of an ingoing eyelet to the upsetting shoulder 19, and finally to enter the bore in the tool In. The horn I1 is provided with means 2| by which the tool 16 may be supported and adjusted to locate the shoulder H! at the desired level.

The plunger I2 is arranged to slide up and down in a bearing 22 afforded by an overhanging portion of the frame 18. The frame also provides horizontal bearings for an operating shaft 25. A crank 26 formed on, or affixed to, the forward end of the shaft is located above the plunger I2 and is operatively connected with the latter by a pitman 21 and a wrist-pin 28. The upper end of the plunger i2 is formed to provide twoconfronting cheeks between which the lower portion ofthe pitman is located and through which the wrist-pin 28 extends. The pitman has a laterally extending arm 29 the purpose of which is to carry a pivot pin 30 for communicating motion to the raceway 24 hereinafter described. The arm 29 is formed to provide cooperative portions adapted to be drawn toward each other by a screw 3| to clamp the pin 30.

The raceway is mounted on a supporting pivot 32 locate-d above the shaft 25 and secured in the upper portion of the frame I8. A hopper 33 carried by the raceway may contain a brush or other suitable device for feeding eyelets into the channel 45 of the raceway and such feeding device may be affixed to the upper end of a shaft 34. A pulley 35 secured to the shaft is engaged by a driving belt 36 to operate the eyelet-feeding device. The delivery end 38 of the raceway (see Figs. 4 and is provided with a notch 39 to enable the spindle I l to be thrust through an eyelet. As shown in Figs. 4 and 5, the eyelet 40 at the delivery end of the raceway is retained therein by aspring-biased detent comprising a member 4|, a pin 42 affixed thereto and a small compression spring 43. The member 4| is connected to the raceway by a pivot stud 44 about which it may oscillate when the pin 42 is deflected by an eyelet impaled on the spindle II.

.The raceway is so formed as to deliver the eyelets flanged end up as shown in Figs. 3 and 4.

A link 50 is formed and arranged to reciprocate the raceway without lost motion. One end of the link is arranged on the pivot pin 30 and the other end is arranged on a pivot pin 5| ,carried by the raceway and secured thereto by cooperative clamping portions through which a clamping screw 52 extends. These simple pivotal connections of the link with the raceway on the one hand and the pitman on the other hand maintain a constant distance between the pins 30 and 5l and do away with lost motion, impacts and noise. Since the raceway is located at the left-hand side of the plunger l2 counterclockwise rotation of the shaft 25 is required to (produce the correct timing of the raceway with regard to the strokes of the plunger [2. Starting-and-stopping mechanism hereinafter described is organized to arrest the shaft 25 when the crank 26 is at top center, as shown in Fig. 1,

and to permit only one revolution ofthe shaft for each run of the machine.

The timing of the to-and-fro motions of the "and 3. In Fig. l the'crank 26 stands at what may be termed the Zero position; in Fig. 2 it has been turned about 25 from the zero position, while in Fig. 3 it has been turned about 35 from the zero position. Referring again to Fig. l the inserting tool In stands at the upper limit of its range of travel but the delivery end of the raceway is outside the path of the tool although close to that path. Now, when the crank 26 is turned to the position represented in Fig. 2 its movement will complete the interrupted travel of the delivery end of the raceway from left to right and thereby place the eyelet 40 in register with the spindle ll. At the same time, the crank will depress the plunger l2 very little but far enough to place the tipof the spindle at the same level as the upper end of the eyelet 46. Although this movement of the crank produces a slight downward movement of translation of the pitman 21 it also produces a relatively great component of angular movement about the wrist-pin .28. At this stage of a cycle the amplitude of angular movement is greatest and the movement of translation is least and in consequence of this disparity the pivot pin 30 moves upwardly despite the downward movement of the wrist-pin 28. The result is that the delivery end of the raceway completes its travel to the right about 25 after the tool Ill begins its down-stroke.

As the shaft 25 continues to rotate from the position represented in Fig. 2 to that represented in Fig. 3 the movement of translation of the pitman 27 accelerates while the angular movement about the wrist-pin 28 de'celerates, with the result that the tip of the spindle II is thrust through the eyelet 40 at a stage when the movement of the raceway is almost negligible. Nevertheless, while the crank is movin from the position shown in Fig. 2 to that shown in Fig. 3 the angular movement of the pitman about the wrist-pin 28 is not quite sufficient to counteract the movement of translation, and the result of this disparity is that the pivot pin 30 moves downwardly but with less amplitude of downward component than the wrist-pin 28. Consequently, while the tip of the spindle H is traveling through the eyelet 40 with increasing speed the delivery end of the raceway is retracted far enough to carry the retaining pin 42 past the barrel of the eyelet and to remove about one-half of the diameter of the eyelet from the raceway. (See Fig. 3.) As the shaft 25 continues to rotate beyond the position represented .in Fig. 3, the raceway moves to the left with increasing speed, thereby clearing the path of the tool Ill. The raceway remains out of the path of the tool Hlthrough the remainder of that cycle of the shaft 25, although it is brought back to the position shown in Fig. 1 after the tool has risen far enough to clear it.

The starting-and-stopping mechanism includes a friction clutch the driving member of aflixed tothe shaft 25. .A flange formed on one end of the sleeve. and a collar affixed to its other end prevent axial movement of the pulley. 'This pulley also has ashoulder arranged to engage the other side of the belt opposite the annular surface 55 of the driven member. The driven member of the clutch also includes a hub 60 in which three sockets are bored for the reception of compression springs 6|. the right-hand ends of these springs are seated on a shoulder of the hub while the left-hand ends are seated on a cam 62 aflixed to the shaft 25. The effect of the springs is to force the annular surface 55 of the driven member against the belt 53 to establish a driving engagement.

The belt is driven continuously and the idle pulley 58 rotates continuously in conformity therewith while serving to maintain a segment of the belt in concentric relation to the annular surface 55. Automatic retraction of the disk 54 from the belt is elTected by an arcuate flange 63 formed on the hub 60 and provided with a wedging surface 64 arranged to cooperate with a starting-and-stopping rod 65. The trailing end of the flange E3 is provided with a stop shoulder 66 arranged to abut the rod 65 to arrest the rotation of the shaft when the crank 26 is at top center, as shown in Fig. 1, but while the wedging face 64 of the flange is traversing the rod 65 it disengages the annular surface 55 from the belt.

The rod 65 is arranged ,to slide vertically in bearings bored in the frame l8 and its upper end is normally maintained in the path of the flange 63 by a compression spring 61. The lower end of this spring is seated on a portion of the frame [8 and the upper end abuts a collar 68 afiixed to the rod. Another collar 69 is affixed to this rod to limit its upward movement by engagement with a portion of the frame [8.

The means for depressing the rod 65 out of engagement with the flange 63 comprises an operating rod 10 also arranged to slide up and down in bearings bored in the frame l8. H represents a treadle rod forming an operating connection between the rod 10 and a treadle (not shown). The rod 10 is normally raised by a compression spring 12 and its upward movement is limited by a collar 13 affixed thereto and arranged to abut a portion of the frame l8. A bracket 15 afiixed to the rod 10 carries an arm 16, the lower end of whichis connected thereto by a pivot pin 11 and the upper end of which is arranged to cooperate with the cam 62. A lug 18 formed on the arm 16 initially overlaps the collar 68 on the rod 65 and is normally maintained in that relation by a leaf-spring 19 aflixed to the bracket 15.

When the operating rod'lfl is depressed by the treadle its downward movement is communicated to the starting-and-stopping rod 65 by the lug 18 and the collar 68. The upper end of the rod 65 is thus disengaged from the flange 63, whereupon the springs 6! shift the driven member of the clutch into engagement with the belt 53. During the first 180 rotation of the shaft 25 the cam 62 actuates the arm 16 to disengage the lug 18 from the collar 68 and in consequence thereof the spring 61 returns the upper end of the rod 65 into the path of rotation-of the wedging element 63, the rod 65 being no longer under control of the rod 10. During the remainder of this cycle of revolution the wedging element 63 traverses the rod 65 thereby disengaging the driven disk 54 from the belt 53 and finally bringing the stop shoulder 66 into engagement with the rod 65. The operator need not release the treadle until he desires to do so, but when the treadle is released the compression spring 12 will raise the As shown in Fig. 6,

arm far enough to carry the lug 18 above the upperend of the collar 68, whereupon the lug will be returned to its overlapping position by the leaf-spring l9 and the starting-and-stopping mechanism will thus be restored to its initial condition in readiness for a repetition of the cycle.

Having thus described my invention, What I claim as new and desire to secure by Letters Patent of the United States is:

1. An eyeleting machine comprising a plunger, an eyelet-inserting tool carried thereby, said tool having a spindle to impale an eyelet, an eyeletraceway the delivery end of which is movable to and from the path of said tool, a crank arranged to reciprocate said plunger, a pitman by which said crank and said plunger are connected, and means carried by said pitman for moving said raceway to and fro in cooperative relation tosaid spindle without 10st motion, said means being arranged to utilize the angular movement of said pitman to move the delivery end of the raceway into the path of said tool when said crank is adjacent to its dead-center position at which said plunger is fully retracted.

2. An eyeleting machine comprising a plunger, an eyelet-inserting tool carried thereby, said tool having a spindle to impale an eyelet, an eyelet-raceway the delivery end of which is movable to and from the path of said tool, a crank arranged to reciprocate said plunger, a pitman by which said crank and said plunger are connected, two pivots aflixed respectively to said raceway and said pitman, and a link connecting said pivots and maintaining a constant distance between them to communicate motion from said pitman to said raceway, said pivots being so located as to movethe delivery end of the race way into and out of the path of said tool with strokes out of synchronism with those of said plunger.

3. An eyeleting machine comprising a plunger, an eyelet-inserting tool carried thereby, said tool having aspindle to impale an eyelet, an eyelet-raceway the delivery end of which is movable to and from the path of said tool, a wrist-pin carried by said plunger, a pitman mounted on said wrist-pin, a crank by which a portion of said pitman is carried in a circular path to reciprocate said plunger, and a link having pivotal connections with said raceway and said pitman at points so located as to move the delivery end of the raceway into register with said spindle and retract it from the path of said tool both while the latter is moving in, a direction to pick an eyelet from the raceway.

4. An eyelet-inserting machine comprising a plunger, an eyelet-inserting tool carried thereby, said tool having a spindle for impaling an eyelet, a raceway the delivery end of which is movable to and from the path of said spindle, operating means including a crank movable in an endless circular path, a pitman connecting the crank with said plunger to reciprocate the latter, and a link having simple pivotal connections with said pitman and said raceway to reciprocate the latter, said pivotal connections being so located as to utilize the angular motion of said pitman to operate the raceway when the movements of translation of the pitman are of least amplitude.

SYLVESTER L. GOOKIN.

Images