US2237438A - Fastening inserting machine - Google Patents

Description

c. H. JAMES 223 7,438

FASTENING INSER'IING MACHINE Filed June 8, 1938 3 Sheets-Sheet l April 8, 1941. c. H. JAMES FASTENING INSERTING MACHINE Filed June 8, 1938 s Sheets-Sheet 2 April c. H. JAMEs 233L438 FASTENING INSERTING MACHINE Filed June 8, 1938 3 Sheets-Sheet 3 l atented Apr. 8, 1941 UN lTED STATES PATENT OFFICE FASTENING INSERTIN G MACHINE Cyril Harry James, Leicester, England, assignor to United Shoe Machinery Corporation, Borough of Flemington, N. J., a corporation of New Jersey Application June 8, 1938, SerialNo. 212,535

In Great Britain June 26, 1937 4 Claims.

tion Serial No. 162,890, filed September 8; 1937,

in the namesof Ricks, Boothroyd' 8a James, now U. 5. Letters Patent No.- 2 ,l52,855, granted April 4, 1939, to staple the upper flange of a stitchdown shoe to the sole while wipers are pressing the flange against the sole, and a principal object of this invention is to provide a hand-operated device to fill this requirement.

As explained in the application referred to, it is desired to bend the staple legs outwardly instead of inwardly, in driving the staple,and an im- F portant feature of the present invention resides in means to effect this result. Accordingly, I have provided a driver passage for the staple having outwardly flared walls at its delivery end permitting such deflection of the staple legs, in

combination with a deflector having similarly flaring surfaces adjacent the said walls to form diverging passages for'the staple legs. Advantageously; also, the deflector is adjustable longitudinally of the driver passage to varythe curvature of thestaple legs as they are driven into the work.

Another feature of the invention resides in means for preventing the jamming of several staples in the nozzle. A handoperated stapling machine is liable to be occasionally operated with insuiiicient force to drive a staple com-- pletely and such a staple may not even be ejected from the nozzle sothat the following staple is liable to jam with it in the nozzle.

I have obviated this difficulty hy a construction wherein the driver-,after engaging a staple to be driven, releases a locking device which prevents return of the driverfar enough to engage a second staple the locking device being rendered inoperative when the driver reaches the proper extremity of its throw.

These and other features of the invention comprising certain combinations. and arrangements of parts will be apparent from the following description of a preferred embodiment of the invention shown in the drawings; in which Fig. 1 is a cross-sectional side elevation of the machine in its normal condition of rest with the staple driving mechanism retracted;

Fig. 2 is a cross-sectional front elevation of the nozzle;

Fig; 3 shows the locking device in the position it occupies when the driving; mechanism is fully retracted;

4 is a vertical section of the nozzle; Fig. 5 is a perspective view showing the lower portion of the front block which forms a part of the head of the machine;

Fig.- 6 is a similar perspective view showing the block portion which forms the other part of the machine-head, the lower end of the staple driver also being shown in the position it assumes when fully retracted;

Fig. 7 is a detail. of the staple supplying means;

Fig. 8 shows a staple driven into a work piece.

Fig. 9 is asectional view of the upper portion of the machine and illustrates the plunger locked in partially retracted position;

Fig. 10 is a view similar to Fig. 9 illustrating the plunger in the fully depressed position in which it releases the locking device; and

Fig. 11 is a View similar to Fig. 4- showing the position of the parts at the nozzlewhen the plunger is fully depressed to drive a staple.

The illustrated device comprises a frame formed as a tubular casing l0, adapted as a hand hold, within the cylindrical bore l2 of which is movable a plunger [4 having a head S6. A pin 23 carried in the casing lilextends transversely through a slot I8 formed in theplunger tion. The lower end of the plunger I5 is provided with clamping means 24 of ordinary construction for holding a driver 26, which is in the form of a hat bar having a reinforcing rib on its front side, as is well known.

The casing H] has a pair of lugs 28 (Figs. 2 and 6) at its lower end between which is secured a block 39, the'front face of which is diametral of the bore l2 and the lower end of which is narrowed at 32 to provide the rear half. of a. Staple guiding nozzle. The front face of the block '30 is provided with two parallel ribs 34 which form a slot 36 for guiding the driver.

A front block 38, shaped similarly to the block 3|], is bolted to the front face of the latter by screws 40 extending through elongated holes 12 in the block 38 to allow for heightwise adjustmerit of the block 38 on the block 30. A screw 42 in the upper face of the block 33, and in contact with the lower face of the casing ll], gages such adjustment. The block 38 has a recess 44 in its rear face which encloses the ribs 34 and the recess 44 has a recess 46 opening into it-to accommodate the rib on the driver 26. The lower nozzle 1301121011 0]? the block 38 ta-pers toward the rear so that the recess 46 runs out into its front face at 48.

The block 30 has a lateral recess 56 in which is mounted a lug 52 on a staple carrier 54 (Fig. 7) The lower part of the member 54 is formed as a saddle 56 which projects through a hole 51 in the block 30 so that its end is flush with the bottom of the groove 36, for carrying a strip of formed staples 58, cemented to one another side by side. The upper part of the member 54 is formed as a keyhole-shaped. guide 66 for a spring-pressed plunger 62 (Fig. l) which hangs down in contact with the rear end of the strip 58 and pushes the staples forward until the foremost staple is beyond the end of the saddle 56 and in the driver passage 36 resting against the front wall thereof (the block 38). The lower end of the driver, in its normal position, is just above this staple and when it is driven downward it breaks oif this foremost staple and drives it through the nozzle.

The sides of the driving passage 36 are flared outwardly at 64 at their lower ends, as shown in Figs. 2 and 6, to permit the staple legs to be deflected outwardly, as is desired for some classes I a diverging guide for a staple passing through the I I nozzle. Such a staple, in passing through the nozzle, straddles the end ID of the deflector 66 and as it emerges from the nozzle its bar forces the bent end III of the deflector aside, to effect its passage out of the nozzle. The above-mentioned vertical adjustment of the block 38 permits some adjustment of the timing of the deflection .and secures a certain control of the curve on which the staple legs are deflected.

The design of the tool is such that when the end of the driver 26 reaches the end of the nozzle, as shown in Fig. 11, the head I6 will strike the upper end of the casing, as shown in Fig. 10.

In case the head I6 were not struck hard enough to drive a staple past the obstruction afforded by the deflector 66 and clear out of the nozzle, the driving of a second staple without clearing the driving passage of the improperly driven preceding staple would be liable to clog the driving passage. the construction now to be described.

A lateral extension I4 (Fig. 3) is provided on the head I6 of the casing I6 and is slotted at I to accommodate a pawl I6 pivoted on a pin I8, the slot I5 opening into the bore I2. The pawl I6 has a cam 8I!82 at its end cooperating with a resilient plunger 84 which tends to ride up on either side of the cam 8082 with which it may be in contact, thus causing the pawl to rotate in one direction or the other. In the position shown in Fig. 3, which corresponds to the uppermost position of the plunger I4, the resilient plunger 84 is urging the pawl T6 in a counterclockwise direction. This movement is prevented by a lug 86 on the pawl which rests against the side of the plunger I4. An upper projecting stem portion 88 of the plunger I4 is slotted on its left side to form an abutment or step 90. When the plunger I4 descends to drive a staple the step 96 will drop below the lug 86 which will then swing This difficulty is avoided by counterclockwise under the reaction of the plunger 84 and lie above the step. When the plunger I4 is forced completely down, as shown in Fig. 10, so that the driver 26 reaches the bottom of the nozzle, the head I6 strikes a second lug 92 on the upper side of the pawl I6 and forces it to turn clockwise and to be held by the plunger 84 on the surface 82, thus removing and holding the lug 86 from the path of the plunger I4. The step is thus permitted to rise to the position shown in Fig. 3 where it strikes a third lug 94 on the pawl I6 and tips the pawl counterclockwise back to the Fig. 3 position. The upward movement of the plunger I4 is thus stopped by the lug 94. In case the plunger I4 has not been depressed far enough to drive the staple out of the nozzle, the head I6 will not reach the lug 92 and the lug 86 will lock on the step 90 when the plunger I4 comes up, as shown in Fig. 9. The lower end of the driver 26 will then be below the top of the saddle 56 and no more staples can be detached or driven until the plunger I4 has been forced completely down and the driving passage cleared.

The pawl I6 is provided with a tooth 96 which, with a side of the lug 86, cooperates with a pin 98 to limit the throw of the pawl I6 under the cam reaction of the plunger 84.

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

1. A stapling machine having, in combination, a nozzle having a driving passage, a driver operating therein, the end of said passage being outwardly flared to permit the outward deflection of the legs of a driven staple just prior to their entry into a work piece, and a deflector located in said passage and having flared surfaces lying adjacent the flared surfaces of the passage to form two diverging passages effecting the deflection of the staple legs when driven through said diverging passages, said deflector having a cam surface arranged to contact with the bar of the staple as it leaves the nozzle whereby the deflector will be displaced to permit passage of the bar.

2. In a stapling machine, a nozzle having'a passage for driving a staple, said passage having an open slot in one side, the end walls of said slot being outwardly flared at their staple delivering ends, a deflector resiliently mounted in said slot having an end portion bent to partially obstruct said passage and having outwardly flared surfaces arranged, with said flrst-named flaring walls, to form diverging passages for the legs of a driven staple, and means for adjusting said deflector longitudinally of said passage.

3. In a stapling machine, a staple-supplying station, a driving nozzle having a passage for driving a staple, said nozzle having an open slot in one side, a plunger, a driver carried by the plunger and operating in said passage, the end walls of said slot being outwardly flared at their staple delivering ends, a deflector resiliently mounted in said slot having an end portion bent to partially obstruct said passage and having outwardly flared surfaces arranged with said firstnamed flaring walls to form diverging passages for the legs of a driven staple, and means for insuring that the driver will move to project a staple past the obstruction aiforded by said deflector before the driver can be retracted to engage another staple.

4. In a stapling machine, a staple-supplying station, a driving nozzle having a passage for I driving a staple, said nozzle having an open slot in one side, a plunger, a driver carried by the plunger and operating in said passage, the end Walls of said slot being outwardly flared at their staple delivering ends, a deflector resiliently mounted in said slot having an end portion bent to partially obstruct said passage and having outwardly flared surfaces arranged with said firstnamed flaring walls to form diverging passages for the legs of a driven staple, said end portion having a cam surface cooperating with the bar of a staple being driven, to move said end portion from obstructing position and to permit the bar of the said staple to pass said end portion, and means for insuring that the driver will move to project a staple past the obstruction afforded by said deflector before the driver can be retracted to engage another staple.

CYRIL HARRY JAMES.

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