US958040A - Fastener-inserting machine. - Google Patents

Description

V W. o. STEWART.

FASTENER INSERTING MACHINE.

APPLICATION FILED DEG 22,1909.

Patented May 17, 1910.

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W. G. STEWART.

FASTENER INSERTING MACHINE.

APPLICATION FILED 1130.22, 1909.

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FAQTENER INSERTING MACHINE. APPLICATION FILED DBO. 22, 1909. 3 ,040, Patented May 17, 1910.

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W. G. STEWART. FASIENER msnn'rme 1s/.e\c1.=mm APPLICATION FILED DBO. 22, 1909.

Patented May 17, 1910.

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. WILLIAM osrnwna'r, or LYNN,

' To-all whom it may concern? UNITED. sTATEs PATENT orrron.

MASSACHUSETTS, ASSIGNOB TO THOMAS PLANT,

. OF BOSTON, MASSACHUSETTS.

FASTENER-INSERTING .MA CHIN E.

Be it known that I,.W1LLIAM G. STEWART,

a'subject of the King of Great Britain, re- 'siding'at Lynn, in the county of'Essex and State of Massachusetts, have invented an Improvement in Fastener-Inserting Ma.-

chines, of which the following description, inconnection with the accompanying-draw. ings, is a specification, like numerals on the drawings representing like parts.

.Q;'lhe invention to be herein-described re-.

lates to machines for inserting fasteners, and more-partlcularly' to machlnes for mserting fastenersin leather during. the manufacture of boots and shoes. 1

'The aims and purposes of the present invention are to provide machine of the above general character which will be simple in "construction and operation, and

whereinfleitherpne or more fasteners-may be driven with equal surety that the fasteners may be properly forced into the work.

The present invention is a development of that setforth and claimed in a prior apprlication, renewal Ser. No; 529,308, filed ovember 30, .1909 to which reference may 2 be had."

".In. the drawingsz -F-igure 1 is a vertical longitudinal section and partial elevation of the lower portion of a machine illustrating one embodiment of the present invention; Fig- 2 is an enlarged detached detail of the pusherto' be described ;-Fig'. 3 is a --..hor-izontal sectionon the line'33 of Fig. .135

1; Fig. 4 isa side view showing a part of the machine head, the driving pulley and clutching device with their associated parts; ind Fig; 5 is a section on the line 5-5 of ,im l.

is fully described in the application hereinbefore mentioned, the column 1 sustains at its upper end the machine head 2 of any desired character'for inserting fasteners and fitted as usual with any suitable work plate. For the present purposes it' is sufiicient to note that the machine is of a character to .in-' sert one nail'orfastener at each rotation cf themain shaft, the period of operation of the machine determining .the number of fasteners that may be driven and it being neces sary to stop the machine to arrest the insertion of the fasteners. As indicated in 4.- and 5, the machine provided with'the mainshaft' 3 head 2 is having at its outer end. portion a suitable Specification of Letters Patent.

. 1 Application filed December 22, 1909. Serial No. 534,409.

Patented May 17,1910,

friction clutch4, controlled by the vertically movable wedge 8 on a slide rod 10, as point- 1 ed out in the a plication mentioned The wedge rod ,10, Fig. 5, passes through the bracketor lug 12 extending from the ma- 0 chine column, and below the lug 12 said rodis surrounded by a spring 13, seated at its lower end against a nut 14 upon the lower end of said rod and tending normally'to depress the wedge rod and-the Wedge, an'd thus stop the machine. Just below the wedge 8, the wedge rod 10 is provided with a lateral-recess, Fig. 5, which receives the end of a brake controlling arm 15, mounted on a stud 15* and from the hub of. which projects the arm 18' connected by theirod 18*to the brake band 19, Fig. 5, surrounding the brake wheel 19*, the .other end of said brake. band being connected to the eccentric portion 20 movable by the arm 15,

the construction being such that when the arm 15 is raised bythe slide rod 10 it will loosen the brake band and when it is depressed by said rod it will ti hten the brake band upon the wheel 19* an assist in stopping the machine.

To control the wedge 8, its depending rod 10 above the 'lug 12, Fig. 5, is surrounded by a sleeve .22 provided with ajflange 23.2 A

little above this sleeve 22 ,is the collar 24 fast v 7 treadle rod is connected at its lower end, see 2 Fig. 1, tothe rear end of-a foot treadle 29,

fulcrumed at 30 and is surrounded by a. spring 33 bearing at one end against a stationary portion of the machine frame and at its other end against a, collar 34 adj-usta'bly secured to saidtreadle rod 27, said spring serving to depress the treadle rod and elevate the foot end of the treadleafter the-lat- .105

ter has been released by :the foot. e v

The slide rod 10 is provided at its upper end with a roller stud 36, Fig.4, shown also in dottedlines in Fig.5, which overliesa cam-37 on the main shaft. shape ofthis cam is such that when once the wedge has been lifted to start the machine, initial tioned. When, therefore,-the operator depresses the treadle 29 and lifts the starting pawl 25 to start the machine, if a single fastener only is to be driven, he-may instantly release his treadle and permit-the pawl to drop, the lifting wedge being locked in its elevated position by its 'cam' 37 to complete the ,rotation of the shaft and the driving of the fastener, after which saidwedge is dropped byits own spring 13 and the ma chine is arrested by the brake described.

Mounted on the main shaft 3 is a cam' provided with a groove 38 in which travels a roller stud on a short arm 39 of a lever 41 mounted on a shaft 40 carried by the machine-head." Depending from the lever 41 is the depending or trip arm 45, the

lower portion of which extends back of the lifting pawl 25, the construction being such that, on the first rotation of the main shaft, and followingthe engagement of the roller stud 36 with its cam 37 which maintains the clutch members in engagement for a complete rotation of the main shaft; the lever 41 is rocked by the cam 38 and the arm 45 disengages the pawl 25 from the shoulder 23 carrledby the slide rod 10, so

that the wedge may drop at the completion of the first rotation of the shaft, regardless of how long the treadle may remain depressed. ,This is of advantage in what is known as single nail work where it is re- ;quired to drive fasteners one at a time in different positions, the work being fedbtween the driving of successive fasteners, because regardless of any inattention on the part of the operator, the machine will drive one fastener completely and then come to rest, the work support maintaining the work in nailing position until the'completion of the driving operation, as will hereinafter more fully appear. I

The-work support is shown, Fig. 1, as a born 47. and is removably mounted upon 'the upper end of a supportingrod 48,

mounted to slide verticall a ,part of the machine column 1. The eta'ils of construction and the characteristic operation of the parts indicated in Fig. 1 are substantially the same as that in the application men-- tioned so that a brief description thereof will be sufficient at this time.

The supporting rodl8 is provided with said prior application.

a nut 49 supported upon a coiled spring 50.

and seated at its lowerend upon a head 51 at the lower end of a barrel-52 that surrounds said spring and its contained rod. This barrel at ltsupper end is closed by a screw plug 53 which serves also as a guide'for the .rod, and seated against the under sideof this screw plug is a stop 53* fast on said rod and serving to limit the upward springpressed movement of the horn, relative toi said barrel. Elevation of the barrel serves also through the spring to elevate'the' rod 48 and the work supporting horn, thereby to raise the-work against the work plate of the machine, as clearly pointed out in When the work meets the work plate, further elevation of said barrel compresses'thespring 50 which presses the work firmly against the work plate' to receive the fastener. When the 50 and then drops the horn. The horn and spring carrying barrel are normally in their lowermost positions to permit ample separation between the horn and work plate for .the removal and insertion of the work, consequently after the work has been placed upon the horn, it is necessary to elevate the latter to position the work. This is accomplished by a positioning means which lifts the -barrel' 52 and through the contained sprin lifts the horn and work.

Referring to Fig. 1, the barrel head 51 upon the cam face 56 of the liftinglever 57 fulcrumed at 58. The lifting lever 57 Fig. 1, to lift-- is swung from right to left the barrel and thereby the horn by a connecting rod 161 jointed thereto and also to the arm of a bell crank lever 62 fulcrumed at 63.

lift vtrod 64:,wliich extends upward, Fig.5, and is jointed at its upper end to the free arm of a lever 65 fulcrumed at 66.and provided with a roller 67 which runs in contact with a cam .68 on the main shaft, the construction being such that initial rotation of the main shaft operates through said cam 68 and rod 64.

' bell crank 62 and connecting rod 61 to push the lifting lever 57 forward and cause it to The horizontal arm of this bell .crarik lever is connected to the lower end of a '85 barrel is dropped, it first releases the spring 1 is provided with a roller 55' which rests I lift the horn to press the work againstthef I work plate ori'nto work fastening'posit on, all of which may be substantially as indicated insaid pr or application. To retain the lifting lever 57 in its forward position with the horn elevated, said lever is pro- -vided with a-toe 73 which stands normally in front of a prop 7 1 fulcrumed at 7 5 in the column. A spring 76 tends to draw said prop away from said toe but it may be pressed forward thereunder to hold thelever in horn lifting position-by a' pusher 77 connected with the upright arm of the bell crank lever 62, and pushedforward by said plication. b

lever as the latter moves to push forward the lifting lever. The prop pusher 77 is shown separately in Fig. 2 and comprises the two telescoping members 78 and 79, the former carrying the roller 80 to act upon the prop 74 and the member 79 being connected to the bell crank lever 62. The telescopic member 78 is socketed .to receive a spring 81 seated at its inner end against a b ock 82 which straddles a pin 83;substantially as set forth in the application hereinbefore mentioned. The protruding ends of the pin 83 overlie the upper cam shaped end 85 of a tripping member 86 which may be of the construction indicated in said prior application, said member 86 being jointed to the free end of a lever 88 fulcrnmed at 89 to the column. Between its ends said lever 88 is connected depending link 90 with the tr'eadle 29. 'lhe pusher 77 is normally under the influence of a spring 94, but, as

pointed out in said application, it is free to be lifted. When the foot treadle 29 is depressed. to start the' machine the releasing device 86 is similarly depressed and the moment the machine starts, rotation of the main shaft operates through the cam 68, Fig. 5, to lift the rod 64 and throw the bell crank lever 62 forward, Fig. 1, thereby to swing the lifting member 57 to lift the horn and at the same time, through the pusher 7 7, push the prop 74 into position under the toe 73, thereby to lock. the said lifting member 57 in position sustaining the elevated horn, the operation in these respects'being substantially as indicated in said prior ap- 0 long as the treadle 29 remains depressed the lifting member will be held in horn sustaining position with the prop 74 under the toe 73, so that in single nail work the first rotation of the main shaft causes the starting pawl 25 on the rod 27 to be tripped and atthe end of the first rotation the cam 37 permits the rod 10 to drop and stop the machine. The operator, however, retaining the treadle depressed retains or may retain the horn in elevated position until after the machine has come to rest to make certain that the fastener is completely driven. 'Thereupon he may re I lease the treadle and permit it to rise under the action of its spring 33, Fig. ,5, thereby operating the releasing device 86 to cause the latter to engage the pin 83 and lift the forward end of the pusher 77, which frees the prop 74 ,and permits the lifting member 57 to move to the right, Fig. 1, andthe horn to descend, all substantially as pointed out in said application to which reference may be had. Thus it will be seen that in single nail work the operator may maintain his foot upon the treadle and retain the horn'in elevated position eventhongh the machine itself. comes to rest, the depression of the horn depending upon means under control of the operator and not upon means con trolled from the stoppin mechanism or the driving shaft. In actuzfpractice upon single nail work the o erator will ordinarily depress the foot trea 1e to start the machine and will, in order to gain speed, immediately release said treadle, without waiting'for the machine to complete its first cycle or rotation of the main shaft, upon the completion of which the machine will stop by reason of the wedge blockS dropping under the action of the spring 18. The actual release and depression of the horn is, however, delayed somewhat by reason of the fact that after the pusher 7 7 has been raised to release the prop 74;, it takes an appreciable period for the prop to be drawn from under the toe of the lifter 5.7; also for the latter to be withdrawn from. beneath the work supporting horn and for the horn to drop, this delay being sufiicient to insure the complete driving of the fastener before the horn drops.

A large proportion of boots and shoes require the insertion of fasteners or nails in series, as for example in a series extending completely around the heel or in a series of sufficient length to extend around a portion thereof where the greatest wearcomes in use. In either case when once thetreadlehas been depressed to start the machine it has been necessary that the o erator retain said treadle depressed for a su cient time to cause the machine to'drive the required series of fasteners in rapid smccession. During this time the .horn must remain in elevated position, except that it must beperiodically depressed slightly topermit the feed durmg the driving of successive nails. In machines feeding device, movement while in the work to feed the latter, whereupon it is withdrawn and thefastener driven in the awl hole. The periodical depression of the horn for feeding takes place ordinarily about the time of insertlon of the awl, to permit the, latter to feed the work without resistance, after, which the horn is again lifted substantially simultaneously with the withdrawal of the awl to permit theinsertion of the nail. This per1- odical depression of the horn for feeding must take place automatically to keep pace with the speed of the machine, accomplished in the present instance, Fig." 1, by providing the horn supporting rod 48 with a'depending extension or grip bar 95, preferably squared in 'cross sectionand arranged these bearings there is a grip arm 97 between which and the lower bearing 96 is the spring 98. Depression of the grip arm is effected by means of the lever 99 pivoted at 100 and having its rear end connected by a rod 101 with a slotted arm of the lever 41,

and this is inn herein provlded as one form of the present invention. Pivot-ally mounted at 102, Fig.

.5, is an angle lever, one arm 103 of which extends upward into proximity to a lug 104 secured to or connected with the slide rod 10, as indicated by dotted lines in Fig. 5, The other arm 10-5 of said lever, Fig. 5, extends outward and its bifurcated portion receives the collar 106 mounted on the upper portion of a rod 107. Disposedbetween the collar 106 and the shoulder108 of the rod 107 is a spririg109, the construction being such that upon upward movement of the rod 107,

which rod is preferably made smaller in diameter at its upper portion to accommodate the collar an 109 will lift-the collar 106 and if the arm 103 is free to move, will move said arm about its fulcrum 102, similarly, if the rod 107 be depressed, the collar 106 will be lowered in a manner to cause the arm 103 to move outwardly or clockwise about its fulcrum 102, a suitable stop 110 being provided at the upper portion of the rod 107 to limit the upward movement ofthe collar 106. The rod 107 extends downward, Fig. 5, through the bracket or projection 112 and has secured theretoan adjustable collar 111, between which and the bearing 112 is interposed a spring 113 which acts normally to depress the rod 107 and through the. means hereinbefore described maintain the arm 103 in the position indicated in Fig. 5. The rod 107 is connected at 114, Fig. 1, to the treadle lever 115 fulcrumed at 116 and having its end opposite the connection 114 with the rod 107 joined by a link 117 to a treadle 118 pivoted at 119, the construction'being such that upon depression of the treadle 118 the treadle lever 115 will be moved to raise the rod 107 and, through the intervening connections described, move the arm 103 into position to engage beneath the lug 104 on the slide rod 10 provided said slide rod is, at the time being, in raised. position with theclutch members engaged. i

From theeonstruction described it will be noted that upon depression of the treadle 29 the rod 27 will lift the pawl 25 and perforce the slide rod 10 to cause the clutch. "members 'to be engaged and the machine to start, and if a single nail is to be driven, the machine will come to rest at the end of the first rotation in a manner already described. If,

however, it is desired to drive nails continuously for any desired period, the operatorputs his foot simultaneously on both treadles I consequent disengagement of the clutch 29 and 118 with the result that the slide rod 10 is lifted by the lifting pawl 25, and the arm 103 of the angle lever, which for identlfication may be designated the series lever, is moved by its spring 109 so as to engage beneath the projection 104 of the slide rod, so that when the lifting pawl 25 is thrown outward or disenga ed from the shoulder 23, Fig. 4, during the first rotation of the driving shaft,. the arm 103 of the series lever will maintain the slide rod raised and per- 'force the clutch members in operative engagement. When the series of nails of a de-' sired number has been driven, the operator slides his foot from the treadle 118 but still maintains the treadle 29 depressed with the result that the arm 103 of the series lever is thrown from under the toe or projection 104 and the slide rod 10 is allowed to drop with members on completion of the current rotation of the main shaft. Owing to the fact,

, .liowever, that the treadle 29 remains d espring 109, the spring I pressed, the horn remains elevated to insure complete driving of the last nail of the series and does not drop until the operator desires this movement and initiates it by removing his foot from the treadle 29. It will thus be noted that upon starting the machine into operation, whether for single or series nail driving, the horn'is raised by power from the main shaft, but at the conclusion of the nailing operation, whether for single or series driving, the horn will remain in raised position until such time as the o erator by. foot or manual control of the treadle 29 may cause it to descend, thus insuring at all times I the complete driving of all thenails and particularly of the last nail of a series.

hat is claimed is: N 1. In a machine ofthe character described, the combinationof a work supporting horn, power operated means for ralsing the horn, machine starting and stopping mechanism,

. the operative or inoperative condition of the machine.

2. In a machine for inserting fasteners singly and in series, the combination of a driving shaft, a work supporting horn, means actuated from the driving shaft to raise the horn to position the work for the a treadle for actuating-said mechanism to 110 insertion of fasteners, startingand stopping mechanism for said shaft, a treadlefor actuating said mechanismgto start the machine, means for then disengaging said t-readle from said mechanism, aseries lever having an arm 103 for-continuing the machine in operation, asecond treadle'connected to said series lever for operating the same. and

means independent of the stopping mechanism and under control of the first named treadlewhen disconnected from the starting mechanism to effect the final depression of lthe horn at-the will of the operator.

3." In a machinerf or inserting fasteners singly and in se'r1es,'the combination of a driving shaft, a work supporting horn,

means including a ClHtCh for actuating said shaft, means actuated from the driving shaft been tripped, a second treadle, a connection between the second treadle and series lever including a spring, and means controlled by the first named treadle and-operable inde-' the lift pawl has been tripped, a second treadle, a collar yieldingly connected theretofor operating the series lever, and means controlled by the first named leverto lower the horn independent of operative or inoperative condition of the machine.

5. In a machine for inserting fasteners singly and in'series, the combination of a driving shaft, a work supporting horn, means including a clutch for actuatlng said shaft, means actuated from the driving shaft for raising the horn to position the work, a lift pawl for operatively connecting the clutch and shaft, a treadle for operating said lift pawl, means for tripping the lift pawl when the machine operates, a seriest lever having an arm 103 for holding theclutch in operative relation with the shaft after the lift pawl has been tripped and a second arm 105, a second treadle, a treadle rod connected thereto, and a yielding collar on said treadle rod and connected with the arm 105 of the awl series lever for yieldingly ,actuat-ing said lever.

6. In af machine for inserting fasteners singly and in series, the combination of a driving shaft, a work supporting horn,

means including a clutch for actuating said shaft, means actuated from the driving shaft for raising the horn to position the work,

a lift pawl for operatively connecting the clutch and shaft, a treadle for operating said lift pawl, means for tripping the lift'pawl when the machineoperates, a series lever having an arm lO3-for holding the clutch in operative relation withfthe shaft after the lift pawl has been tripped and asecond arm .105, a second treadle, a treadle rod connected'thereto, a yielding collar on said treadle rod and connectedwith the arm 105 of the series lever for yieldingly actuating said lever, and means controlled by the first named treadle for lowering the horn.

7. In a machine for inserting fasteners singly and in series, the combination of a driving shaft, a work supporting horn, means for raising the-horn by the driving shaft to position the work, clutch for connecting the driving shaft with a source of power, a treadle for operating the clutch,

means for then disconnecting the trea dle I from the clutch, a, series lever having an arm'to hold the clutch in driving connection with the shaft after the said treadle has been disconnected therefrom, a second treadle, and yielding connections'between the said second treadle and series lever for operating said lever and causing'its arm -to hold the clutch in operative relation with the shaft. Y

' 8. In a machine for insert-ing fasteners singly and in series, the combination of a driving shaft, a work supporting horn, means for raising'the horn by the driving shaft to position the work, a clutch for connecting the drivingshaft with a source of power, a treadle foroperating the clutch, means for then disconnecting the treadle from the clutch, a series lever having an arm to hold the clutch in driving connection with the shaft after the said treadle has been disconnected therefrom, a second treadle, yielding connections between the said second treadle and series lever for operating said lever and causing its arm to hold the clutch in operative relation with the shaft, and means actuated by theoperator for lowering the horn after the last nail has been driven.

means for then disconnecting thetreadle from the clutch, a series lever pivotally mounted on the machine frame and having an arm 103 to hold theclutch and shaft in driving connection after the treadle has been disconnected therefrom and a second shaft to position the work, a c utch for connecting the drivin shaft with a source of power, a treadle For operating the clutch,

means for then disconnecting the treadle from the clutch, a series lever pivotally mountedon' the machine frame and having an arm 103 to hold the clutch and shaft in drivin' connection after the treadle has been disconnected therefrom, and a second arm 105, a collar 106 engaging the arm 105, a treadle rodon which sald collar is yieldingly mounted, a second tre'adlc connected to said treadle rod, and means under control of the first named tr'eadle for permitting the operatorto lower 'the horn and insure comp ete driving of the last nail.

In testimony whereof, I have signed my name vto this specification, in the presence of two subscribin witnesses.

v igHLLIAM C. STEWART.

Witnesses:

AMELIA M. Ross, ALFRED H. 'HUNDLEY.

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