US2182021A - Fastener inserting machine - Google Patents

Description

Dec. 5, 1939. s. GQOK|N FASTENER INSERTING MACHINE Filed Oct. 22, 1937 3 Sheets-Sheet l Dec. s, v'1939. l s L, @om 2,182,021

FASTENER INSERT ING MACHINE Filed Oct. 22, 1937 3 Sheets-Sheet 2 Dec. 5, 1939. s. L'I GOKlN 2,182,021

FASTENER INSERTING Mmmm;V

Filed oct. 22, 1957 v s sheets-Sheet 5 5 65 "5M Le? W Patented Dec. 5, 1939 PATENT OFFICE 2,182,021 FASTENERy INSERTING MACHINE l Sylvester L. Gookin, Quincy, Mass., assignor to United Shoe Machinery Corporation, Borough of Flemington, N. J., a corporation of New Jersey Application. October 22,

4 Claims.

This invention relates to fastener-inserting machines of the type in which fasteners such as eyelets or grommets are supplied by automaticmechanism to the mechanism for inserting them into the work. The invention is Aherein disclosed as embodied in a fastener-inserting machine of the type illustrated and described in United States Letters Patent No. 2,007,274, granted JulyA 9, 1935, on application of J. A. Johnson.

Machines of the type under consideration are used chiefly for inserting large eyelets or grommets into heavy, tightly-woven fabric intended Afor sails, awnings, protective coverings and analogous purposes, and to insure the greatest `possible security of the grommets when clenched in the fabric, the clenching tool is provided with a pointed central'projection or pilot adapted` to pierce or stab a fastener-receiving hole in the fabric without cutting out or removing any of the fabric. This piercing, when operating upon heavy, tightly-woven fabrics, should be completed before a fastener is brought into engagement with the Work, since it is virtually impossible to obi,

ber, thereby preparing the material for insertion of a fastener in the second revolution.

Machines of the type under consideration are also sometimes used with pre-punched materials that do not require a preliminary impaling stroke,

and for this reason they are provided with starting and stopping mechanism including a Wellknown form of one-revolution clutch and a treadle mechanism for setting it in operation, but when such machines are used according to the conditions set forth in the above-mentioned patent they have heretofore required starting and stopping twice for each fastener inserted. A wellknown one-revolution clutch of the'type mentioned is illustrated in United States Letters Patent No. 784,653, granted March 14, 1905, on application of O. S. Beyer, in which the elements are arranged to operate in the manner of the corresponding elements of the clutch illustrated fastener-receiving material on the piercing mem- 1937, serial No. 120,433y

herein, but in which some of the details of construction are of different design.

To insure two revolutions of the driven member of the clutch for each depression of the clutch-controlling treadle, and to insure stopping `5 the machine in every' instance at the completion of the second revolution, the present invention provides improved clutch-controlling mechanism by which the clutch, once set in operation by dei pressing the treadle, will continue so through '-10 two revolutions, regardless of the position of the treadle, and will be automatically disengaged only during the second revolution, thereby operating the fastener-inserting mechanism twice and the ,Y fastener-supplying.mechanism once in every run l1li of the machine. The invention is illustrated as `embodied in an eyelet or grommet setting machine of the type described in said Johnson Patent No. 2,007,274. It should be recognized, however, that it is capable of embodiment in fasten-,20 ing inserting machines of other types. Furthermore, while the clutch-controlling mechanism of the illustrated machine is such that the machine comesto rest at the end of two cycles of rotation of the driven member of its clutch, it is evident that the invention may be embodied ina mechanism designed to insure more than two revolutions before stopping, and the reference to the rst and second revolution in this specification and the accompanying claims should not. be taken as necessarily limiting the invention to a construction in which the clutch or the'machine comes to rest at the end of the second revolution.

Referring to the drawings: r

Fig. 1 is a front elevation of a fastener-inserting machine embodying the present invention;

Fig. 2 is a front elevation, partly in section, of a two-revolution mechanism including a cam for operating the raceway, a modifier, speed-reducing'v gearing for rendering the cam effective only during its second cycle of rotation, and a half-speed cam also driven by the speed-reducing gearing for disconnecting the clutch at the end of its second cycle of rotation;

Fig. 3 is a perspective View (direction from right-front to left-rear) including the clutchcontrolling mechanism in its initial position, as when the machine is stopped;

Fig. 4 is a sectional view of the assemblaget otherwise pictured in Fig. 2, taken on line IV-IV of Fig. 2;

Fig. 5 is a front elevation including the clutch, the clutch-controlling member, and connections for operating the latter, all theiparts beingrepre-55 sented in their initial positions, as when the machine is stopped;

Fig. 6 is a front elevation of the assemblage otherwise pictured in Fig. 3; and

Fig. 7 is a side elevation of a mechanism otherwise represented in Figs. 3 and 6, whereby the clutch-controlling member is tripped-or released to stop the machine oncompletion of a prescribed run.

Referring to Fig. 1, in which the main frame of the machine is indicated at I0, an eyeletor grommet-inserting tool I I of common-construction is carried by a vertically movable slide I2 and co-operates with a stationary tool provided with an annular clenching surface I3 and a tapered and pointed central pilot and piercing member I3 projecting upwardly from the center thereof. K

The slide I2 is arranged to be reciprocated in guides I5 and is operated by a wrist-pin I1 to whichit is connected by a link I8. The wrist-pin is aiiixed to a shaftlt'journaled in bearings in the frame I'. The rear end of the shaft I9 is provided with a clutch of well-known construction that operatesin' the-manner of the clutch dis-- closed in the above-mentioned Beyer Patent No. 784,653. The driven member ZI! of the clutch is aiiXed-to'the shaft Igbut the driving member ZI may rotatewithout driving the shaft except `when the driven member 2Q is connected to the y*driving member 2l.

This member is also a iiywheel and its periphery'isformed to be engaged by a driving belt.

The raceway 22, surmounted by a supply-hopper '23, is larranged to present Ifasteners to the spring-pressed spindle 24 of the inserting tool II. When the tool-II is fully depressed it receives the member. Irl which repels the spindle 2d. The raceway and hopper unit is afxed to a frame or carrierl and the latter ismounted on a horizontal rod 25 about which it may be oscillated by a cam' hereinafterdescribed. Aroll 2l vmounted on the frame 25 engages the operating cam and is maintained incontact therewith by a tension spring 28 one end ofwhich is attached to an anchoring pin 29 and the other end to a` pin 30 secured to the carrier.

.Referring to Figs. 2, 4, and 6, the cam 3I vfor operating-the raceway unit is affixed to the shaft I3, and would normally operate the raceway once in each cycle'of its rotation, but its opera- Ative effect isl postponed until the second cycle of itsrotation by a slow-speed modier 32 arranged in concentric relation thereto and supported thereby with freedom for relativel rotation. arranged to engage the cam-roll 2l, each having a concentric high portion equal in radius to the other. The modifier, because of its slow speed of rotation, is effective to maintain the raceway in its retracted or inoperative position (Fig. l) throughout every rst revolution of the cam.

As pictured in Fig. 6, the modifier 32 is actingvto maintain the roll 2'I away from the low portion of the cam 3l. This ligure, as well as Figs. 1,*2, and 3, represents the parts in their initial positions. A spur-gear 33 formed on the hub ofthe cam engages and drives an intermediate pinion 34, the teeth of which also engage aninternal gear 35 formed on the modifier. The pinion 34 rotates on a stationary pin or stud 35 affixed to a circular plate 3l through which thev shaft lSeXtends. This plate has a bearing on the shaft and also hasan arm 38 by which it is anchoredztdthe stationary rod 25. The effective automatically l yate kthe raoeway.

The cam 3I and the modierv are both diameter of the internal gear 35 is twice as great as that of the driving gear 33, and the modifier 32 is therefore driven at half speed to preventl operation of the rac'eway during the first cycle of rotation of the cam 3|. It is only when the low portion of the modifier is in range of the cam-roll 21 that the cam 3l is effective to oper- All thel details of the construction,-'organiza tion, and operation heretofore vdescribed are in the aforesaid yJohnson PatentNo. 2,007,274, and the novel features hereinafter described provide for utilizing th-e Vslow-speed member 32 for the additional purpose of modifying the operation of the one-revolution clutch to insure two revolutions thereof for each lstarting operation of a clutch-controllingv treadle.

Referring to Figs. 3, 5, and 6, the driven member 2U of the clutch carries a rocker comprising a-:headlit and a stem 4 I that extends throughthe driving member 2I but has afcylindrical'bearing in the driven member ..29 as exempliied'inthe aforesaid Beyer patent. l:'Ihestem-f-Ill is Ythekey -portionvof the clutch and the portion-55 that, extends through the driving memberZI-is of` accordance with the subject-matter set forth in semi-cylindrical section represented in ydotted lines in Fig. 6. The-head il@ atv one vend Vof the stem 4I Vis nested in angexternalsectoral recess in the drivenmember 23, -butfa portion of this head j. projects far enough from the recess toi beengaged by a startingand stopping leverfll. As shown-in Fig.,5 va spring-pressed plunge'rl contained in Y a socket in the drivenmemberliis arrangedto exert force against the head-lithereby-to turna.

therocker in a clockwise-,directionto.its'driving positionA when the lever ,32 isretracted ,tothe rightto release the rockenbut when the parts are in .their initial positionsVasshown in this ligure, the lever.42` is effectiveftoaarrest rotation i.,

of the driven member fand to repel the'piunger *I3 into its` socket. YUndeiQ-these conditions the driven member l-Zlis released' from the driving l member 2 I of .the ,clutchy kbecause theV semi-cylindrical' key portiongofthe rocker, havingr been turned counterclookwise back `to. the position shown-in Fig. 6, clearsthedrivingmember.

Thefdirection of vrotationofthe shaft I9 is clockwise ras viewed vand'li's indicated by arrows inFigs. l, 3, and 5. y,When the vstarting and stopping member .#152, is retracted to release the headi, a detent .53 Vdrops over 4a .shoulderv llili on the memberllz and .remains behind ,the

shoulder rthrough one compleftecycle of rotation of theclutch vand througha portionof the second tion, but during the second cycle, the detent is automatically raised to release the member '42 which thereupon returns to the path of rotation of the member lill where it is effectivenot only to disconnect the clutch but also to arrest rotation' `35. Thepin-IL-is afiixed to the leverul but the triprnember' 4,9k isI carried by vthe emember :42 ,to

. `.55 cycle to maintain the member 2 lout of .opera-"- which it is connected by a pivot stud i and by a tension spring 52. This spring normally maintains the trip member iii in Contact with the 5t), to the end that a shoulder member i9 will cooperate with the pin tc impart starting movemen to the member i2 and to place this member under control o the detent 43 when the treadle-rod il is depressed. The trip member F43 is provided With a boss E@ that normally maintained in the path of rotation or a cam portion E5 on the driven member consequently, during the rst quarter of the 'ii-rst cycle of rotation of the driven member iii the cam portion G5 depresses the boss it@ far enough to lift the shoulder b3 of the member d@ from the pin 5U, thereby rupturing th-e starting soir voticn but leaving the member 42 under the soie con'- trol of the detent 43 which has dropped behind the shoulder ifi Where it is eiective to maintain the member L32 in its retracted position. The clutch, therefore, continues in operation so long as the member l2 is restrained by the detent 33, but during the second cycle of rotation, the detent is displaced from the shoulder lili to release the member 42. This releasing movement is derived from the same device (Figs. 2 and 6) that postpones the operation of the raceivay until the second cycle of rotation.

For this purpose the periphery of the slowspeed modier 32 (which, it will be remembered, makes only one revolution While the driven member of the clutch and the cam 3l make two revolutions) is provided with a high portion 56 (Fig. 6) that is offset axially from the roll 2l to clear it but acts as a cam to operate a mechanism comprising a cam-roll 5l (Fig. 3), a carrier 58 therefor, a rock-shaft 60, a lever 6l affixed thereto, and a link 59 connecting the carrier 58 and the lever SI. The detent 43 is also axed to the rock-shaft 60 and the latter is journaled in a bracket 62 afliXed to the frame It. The bracket 62 also provides support for a vpivot stud G3 on which the roll-carrier 58 is mounted. A torsion spring 64 anchored to the bracket 32 applies its force to the roll-carrier 53 tomaintain the roll 5l.`

in Contact with the cam member 32 and the detent 43 in its operative position.

During the second cycle of rotation of the clutch member Zll, the cam portion 55 engages the roll 51 to raise the detent 43 above the shoulder formed on the iii thereby'trip'ping or releasing the starting and stopping member 2. The spring M thereupon' returns the member d to its stopping position (Figs. 3, 5, and 6) in which it stands in the path of the head it Where, on the completion of the second cycle of rotation, the driven member 2U Will be declutched and arrested. This automatic postponed tripping of the member i2 cannot be prevented by maintaining the treadle-rod .lil in its depressed position because in the ilrst cycle of rotation of the member 29, the control of the member i2 by the treadle is terminated by the action of the cam 65 on the trip-member e9.

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

i 1. In a power-operated fastener-inserting machine oi the type in which the driven member of a clutch drives a cam at one speed and a modifier at half-speed, the one to operate a fastenerpresenting device and the other to postpone the operation of said device until the second revolution of each run of the cam; a movable starting and stopping member arranged to control said clutch, a detent arranged to' restrain said starting and stopping member in position to permit the clutch to drive the machine, and means operable by said modifier in the second revolution of said cam to impart releasing movement to said detent. 2. A machine organized as set forth in claim 1, in which said modifier is a rotary member having one portion to postpone the operation of said fastener-presenting device and another portion to impart the releasing movement to said detent.

3. A machine organized as set forth in claim 1,

in which the operation of said fastener-presenting device by said cam and the releasing movement imparted by said modifier are both limited to the second revolution of each run of said driven member of the clutch.

4. A machine organized as set forth in claim 1 but comprising alsov manually operable means arranged to impart starting movement to said starting and stopping member and thereby place the latter under the control of said detent, and means operable byl said clutch during the first revolution of said driven member to release said starting and stopping member from said manually operable means and to the sole control of said detent.

SYLVESTER L. GOOKIN.

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