US1399799A - Tacking mechanism - Google Patents

Description

E. E. ROWE.

TACKING MECHANISM. APPLICATION FILED APR. 30. 1918.

1,399,799, I v Patented Dec. 13, 1921.

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: N TE STATES Parent-on EDGAR E. nown, or CHICAGO, rumors. ASSIGNORTO u v zrnn s ren ,M o conrona'rron, or ra'rnnson, NEW" JERSEY, A oonrona'r on or n-nw EnsnY.

'T'ACKZENG MECHANISM.

Specif cation of Letters Patent.

Application filed April so, 1918. EaeiialN o.q231,8,16.

To (ZZZ whom it may concern: 7

Be it known that I, EDGAR E. Rown, a citizen of the United States, residing at Chicago, in the county of Cook and State .of Illinois, have invented certain Improvements in Tacking Mechanisms, .of which the following description, in connection with .the accompanying drawings, is a specification, like reference characters on the drawings indic ating like parts in the several figures.

This invention relates to tackin {mechanism, and is herein shown, for purposes of illustration, as embodied in mechanism particularly adapted for use in the manufacture ofboots and shoes for securing portions of the shoe in proper relation. More particularly, the invention is herein illustrated its application .to a machine for pulling uppers over lasts, the illustrative machine having features of construction which are of particular utility in operation upon turn shoes. It will be understood, however, that the invention in its broader aspects, although involving important advantages in use .on turn shoe work as will be hereinafter explained, is not thus limited in utility nor restricted in its applicability-to machines of the particular class exemplified by the construction shown.

Pulling-over machines of. a well known type incommon use comprise, intheir organization, grippers which areoperated to pull the upper over the last, and tacking mechanisms which are moved inward over the bottom of the shoe and are operated to drive a plurality of tacks at separated points for securing the upper in its pulled-over position. On McKay shoe work these tacks are (fully driven, while on welt work and turn work thetacks are only partially driven, a substantial portion of the tack being left projecting from the shoe to facilitate subsequent removal. .On welt work it is the practice to drive the tacks through the upper and the innersole-and a substantial distance into the withlthe welt shoe innersole, provides suf- Patented Dec. .13, 1921. I

.ficient substance for anchoring the tacks securely enough -to;hold the upper,-and therefore affords opportunity for driving the tacks only partially through thesole in .such manner as to avoid marks on the finished side of the sole. Attempts to drive the upper fasten ngtacks in this .mannerhave. however, heretofore met with serious difficulties which it is one of the important objects of this invention to avoid. v Tacking mechanism of a well known ltvpe n use ,on; pull1ng-,over and other machines comprises a tack holder having relatively I I separable portions provided in theiradjacent faces with cooperating recesses which form a tack pocket for receiving and holding a tack, the two portions being normally held together under spring pressure, and a driver which engages the tack in the pocket and forces it into the work. Thismechanism is moved transversely of the edge of the shoe bottom into tack drivin position,a nd afterthe tack is driven is moved reversely away from the tack. In order to insure effective control of the ,tack in its passage from the tack holder to the work to cause it to be driven in the desired direction. it is necespiercing thatsurface ofthe sole which isnext' to ,the last, it is practically unavoidable, if

the-tack is .;to be guided properly, that a portion of the tack shall be left projecting VVllih.

in the tack holderat the end of the driving movement of the tack driver; Under such conditions it .has been found that when the tacking mechanism backs away from the tack the tack holden; by engagement with the head ofthe tack'partiallyconfined within the tack ,pooket, tends to vpull the tack laterally and in view .of, the relatively yieldable characterofthesole materialmay-bend it out of its place .or [even withdraw it entirely from the shoe. g

Th1s inventlon provldes an mprovement in tacking .mechanlsm wherebv it 1s rendered feasible to drive a tack only to the extent.

desired without involving'any substantial danger of displaCQlllQllt of the tack in the relative separating movement of parts of the mechanism and the work, however yieldable may be the character of the material into which the tack is driven. For the purposes in View the invention provides a construction in the operation or" which an outlet passage such as to prevent displacement of the tack is afforded for that portion of the tack which remains within the tack holder at the end of the tack driving operation. It is an important characteristic of the construction wherein the invention is herein shown as embodied that the portions of the tack holder are separated sufiiciently in the driving operationto relieve that portion of the tack which remains within the holder substantially from the pressure of the holder, and to afiord a free outlet passage for the head of the tack, and are held in such condition until the holder has been withdrawn from the tack.

The novel features-oi the invention, including certain details of construction and combinations of parts, will now be described with reference to the accompanying drawings and pointed out in the claims.

In the drawings,

Figure 1 is a view in front elevation, with parts shown in section, of a portion of a pulling-over machine having tacking mechanism in which the invention is embodied;

Fig. 2 isa view in perspective of a portion of the mechanism shown in Fig. 1, illustrating the relation of the parts to the shoe when the tacking mechanismis in tack driving position;

Fig. 3 is a view similar to Fig. 2 illustrating the relation of the difi erent parts to one another and to the work after the tack has been driven and the tacking mechanism has been partially withdrawn;

Fig. iis a view sh wing the tack holder in vertical section and illustrating the position of the tack prior to the tack driving operation,

Fig.5 is a View similar to Fig. 4 illustrating the relative positions of the parts when the tack driver is at the end of its driving movement, and

Fig 6 is a perspective view of one of the parts of the tack holder, illustratingthe character of the tack receiving recess.

The invention is herein shown in its application to a pulling-over machine of a well-known type particularly adapted for operation upon turn shoes and comprising,

in addition to the upper pulling means,

mechanism for working the forepart of the shoe upper into lasted position, the construc tion of the illustrative type of machine being more fully shown and described in a United States Letters Patent No. 1,280,613, granted on Oct. 1, 1918. upon an application of @rrellA-ishton. The drawings show only a portion of the pulling-over, lasting and. tacking means arranged to operate at one side of the forepart of the shoe, but it will be understood that the machine is provided with means tor pulling the upper at the toe and at opposite sides of the torepart, means for wiping the upper into lasted position about the toe and along the opposite sides of the toe portion, and means for driving a plurality of tacks at each side of the shoe and also around the toe end of the shoe for holding the margin of the upper in place.

In Fig. 1 is shown a portion of the'sole rest 2 of the machine which engages the sole (4 of the shoe on the last b to hold the shoe against the strain of the upper pulling,

means and determine the position of the plane of the sole relatively to the tacking means, one of the several grippers l which are operatedto pull the upper 0 over the last, a portion of the lasting wipers 6 which are operated to wipe the upper over the sole around the toe, and one of the supporting and clamping devices 8 which engage the shoe at the opposite sides of the forepart to hold it and support it during the tacking operation and to assist in positioning it relatively to the tacking means. In Fig. 1 is shown also one of the side tacker arms 10 of the machine which is mounted on a support 12 for swinging movement toward and from the shoe and carries a plurality of tack holders, comprising opposed fingers 14;, and tack drivers 16,'only one such holder and driver, however, being shown in the drawings. It will be understood that the machine is provided with another tacker arm 10 withits tacking mechanism at the opposite side of the shoe and with similar tacking mechanism for the toe end of theshoe. Since these different mechanisms, and the different tack holders and drivers of each mechanism, involve no essential differences one from another as far as the embodiment of the present inventionis concerned, it will be sufii cient for an understanding of the in-- vention to refer in detail only to one of the tack holders and its associated driver.

Connected to the driver 16 is a driver bar 18 which is mounted ionlengthwise movement in the tacker arm 10 and receives its operative movement from an oscillatory driver arm 20 under the impulse of a sprin 22. The driver bar 18 is normally upheld against the pressure of the spring operated arm 20 by the usual mechanism characteristic of machines of the illustrative type, and is released at the proper time in the cycle of operations of the machine to render the spring effective to impart operative movement to the bar to cause the driver 16 to drive the tack, the limit of driving movement of the bar and the driver being determinedby the engagement of an adjustable washer on the driver bar with a portion of the support 12. The position of the washerQl: and the limit of operative moyement of the bar is determined by the adjustment of nuts26 on the end of thebar. The

movements of the .tacker arm .10 and .the

mechanism carried thereby in directions to ward and from the shoe are effected by nieans of a rack bar 28 and a gear segment- .30, shown fragmentarily in F 1g. 1, the conbeing more fully shown and described in United States Letters Patent No. 1,082,487,

granted on December 30, 1913 upon an application of Arthur Bates.

The tack holder, as more fully described in the prior patent of Orrell Ashton hereinbefore referred to, comprises the two complementary fingers 14 embracing and seated in grooves in a supporting plate 32 on the tacker arm 10 and normally pressed together and held in place by means of a spring 3 1. The two fingers at their front ends are provided with complementary grooves or recesses 36 which provide a pocket for the reception of the tack ,cl .deposited therein automatically at a predetermined time in the cycle of operations of the machine. Subsequent to the upper pulling operation the tacker arm 10 is swung inward by its operating mechanism, in ;u nison with the overdraw movement of the side gripper 4, into position for driving the tack, the inward movement of the tacker arm being limited by engagement of a portion of the mechanism' carried thereby with a part of the side clamp mechanism 8. During the latter portion of the inward movement of the tacker arm the grip.- per is tripped and caused to release the margin of the upper, and after the acking mechanism has arrived at its limit of inward movement, the driver bar 18 is; re;

leased to the action of the spring arm 20 to cause the tack to be driven. WVhile the driver 16 is held substantially at the end of its driving movement, the tacker arm 10 is swung outward to carry the tack holder clear of the tack and continuing its move ment is returned to its starting position, the driverbar 18 being then raised to withdraw the driver from the tack pocket and leave the pocket in condition for the reception of another tack.

For the purposes of this invention each of the recesses or grooves 36 in the adjacent sides of the tack holder fingers 14 is provided at its lower end with a tapering por tion 40 of considerable length, these tapering portions coiiperating to provide a comparatively narrow tapered recess for guiding the tack. Asthe tack is forced outward by .the action of the driver 16, the shank of the tack is forced through this narrow recess which serves as a guide to insure that the tack shall ,be driven inthe right direction, causing the two :fingers to separate -slightly against the tension of the spring 34;, the two fingers being further separated by the wedging actionof the head ,ofuthe tack and then of .the end of the driver 16 i on the walls of .the tapered recess near the end of the tack :dri-ving operation. Preferably theQtack .holder is positioned in sufficiently close proximity to the work to per- ,mit a substantial portion of the length of the tack to be forced into the work before' the driver becomes effective to spread the fingers 14. The tack is thus held in effective control asto the direction-of its driving movement during its passage between the tack holder and the work and until it has effected a substantial entrance into the work. As the head of the tack is forced downward through the tapered recess at the lower end of the tack pocket the driver 16, which is preferably .of slightlylarger diameter than the head of the tack, becomesefiective upon the walls of therecess -to wedge the walls apart during the continued driving movement of the tack. For the purposes of this invention, the movement of the driver 16 is limited by adjustment of the washer 2 1 to prevent the tack from being driven entirely through the sole a, and as shown in Fig. 5, which illustrates the positions of .the parts at the end of the movement of the driver, the'tack cl is left with its head portion still projecting within the tapered re-.

been withdrawn laterally away from the tack, as illustrated by Fig. 3, although it will be evident that in the construction 7 shown the driver, by its engagement with the walls of the tapered recess, will remain eifective to prevent any substantial displacing action upon the tack even if the driver begins its return .movement before the tack holder is entirely clear of the tack. It will be evident that by the construction herein provided any such pressure of the parts of the tack holder upon the tack as would tendto displace the tack laterally is entirely obviated, and that however lightly the tack may be anchored in the work, there is no danger of bending it or of withdrawing it from the work during the retractive movement ofthe tacking mechanism.

While the term tack is used herein ,to designate the fastener which the illustrative mechanism is adapted to drive, it will be evident that the invention is not limited in utility to mechanism for driving'fasteners or" the precise form shown, and it should therefore beunderstood that the term is used in a generic sense as applicable to various forms of fasteners.

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

1. In mechanism .i'or applying to shoes upper holding tacks-which are to be subse quently pulled, the combination with means for determining the plai-Le of the tack receiving surface of the shoe, of a tack holder between which and the shoe there is provision for relative movement toward and from tacking position transversely of the direction of driving movement of the tack, a tack driver, driver operating means and controlling means arranged to arrest the movement of said driver at such a distance from said plane as to leave a portion of the driven tack projecting outside oi the tack receiving surface of the shoe, said holder being constructed and arranged to guide the tack beyond the limit of the movement of the driver and to be conditioned by the driver to present a tree outlet passage for the head portion of the driven tack until the holder is clear of the tack in the relative movementof the shoe and the holder laterally of the tack. away from the tacking position. 7

2. In mechanism for applying to shoes upper holding tacks which are to be subequently pulled, the combination with means for determining the plane of the tack receiving surface of the shoe,,of a tack holder between which and the shoe there is provision for relative movement toward and from tacking position transversely of the direction of driving movement of the tack, said holder comprising relatively separable portions constructed to position a tack between them ieldable means for relativel positioning saidportions oi the holder while permitting their relative separation in the tack driving operation, a tack driver, driver operating means and controlling means arranged to arrest the movement of the driver at such a distance from said plane as to leave a portion of'the driven tack projecting outside of the tack receiving surface of the shoe, the separable portions of said tack holder being constructed to guide the tack beyond the limit oi the movement of the driver and to be wedged apart and held by the driver in such relation as to provide an outlet passage for the head portion of the driven tack of a width to prevent pressure on the sides of the head of the tack during the relative movement of the shoe and the holder to clear the. holder from the tack. V V

3. In mechanism 01 the class described, a

tack holder comprising relatively separable portions constructed to position a tack between them, means for ellecting relative movement of said holder and the work after the driving of a tack, and means for driving a tack only partially out of said holder and into the work and for eifecting and maintaining such relative separation of the por tions of the holder as to provide an outlet passage for the tack of a width to prevent any substantial pressure of the holder on the tack until the holder is clear of the tack in the relative movement of the holder and the work after the tack driving operation.

t In mechanism of the class described, a tack holder comprising relatively separable portions constructed to position a tack between them, yield-able means for relatively positioning said portions or" the holder while permitting their relative separation in the tack driving operation, tack driving means, means for controlling said driving means to cause a portion of the tack to be left upstanding, from the work and within the tack holder at the end of the driving operation, and means for moving the tack holder laterally of the tack to withdraw said holder from the tack, the tack driving means and the tack holder being constructed to cooperate for maintaining such relative sep aration of the portions of the holder as to provide an outlet passage for the driven tack of a width greater than the diameter of the head of the tack to prevent displacement of the tack in the withdrawal of said holder. i

j 5. In mechanism of the class described, a tack holder comprising relatively separable portions having opposed recesses for holding a tack, yieldable means for relatively forcing said portions of the holder toward each other While permitting their relative sepa ration in the tackdriving operation, a tack driver, means for operating saiddriver, and means for effecting relative movement of the holder and the work after the driving of a tack, said driver and operating means being constructed and arranged to force the tack only partially out of the holder and then to maintain the portions of the holder separated in such manner as'to provide an outlet passage for the tack of a width to prevent any displacing action oi the holder upon the tack until the holder is clear or" the tack in the relative movement of the holder andthe work. V

6. In mechanism'or" the classdescribed, a tack holder comprising relatively separable portions having opposed recesses for holding a tack, yieldable means for relatively positioning said portions of the holder while permitting their relative separation in the tack driving operation, a tack driver, means for operating said driver, means for limiting the movement of the driver to cause the head portion of the tack to remain between the tWo portions of the tack holder at the end of'the driving operation, and

means for effecting relative movement of the holder and the work after the driving or a tack, said driver and the walls of said recesses being constructed and arranged to cause the driver to effect such relative separation of the portions of the holder as to provide an outlet passage for the tack of greater width than the diameter of'the head of the'tack' and-to maintain the portions of the holder thus separated to prevent displacing action of the holder upon the tack until the holder is clear of the tack in the relative movementof the holder and the work after the tack driving operation.

'7. In mechanism of the class described, a tack holder comprisingrelatively separable portions constructed to position a tack between them, a tack driver,-means for operating said driver, means "for limiting the movement of the driver to cause the head portion of the tack to remain within the holder at the end of the driving operation, and means for effecting relative movement of the holder and the work after the driving of a tack, said portions of the holder having elongated tapering recesses opposed to each other for holding and guiding the tack, and the driver and the walls of said recesses being constructed and arranged to cause the driver to effect a relative separation 01" the two portions of the holder and to maintain said portions in such separated relation as to provide an outlet passage for the tack of a width to prevent any displacing action of the holder upon the tack during the relative movement of the work and the holder to clear the holder from the tack.

8. In mechanism of the class described, a tack holder comprising relatively separable portions having opposed recesses with tapered walls for holding and guiding a tack, yieldable means for relatively forcing said portions of the holder toward each other while permitting their relative separation in the tack driving operation, a tack driver, means for operating said driver to force the tack into the work and to efiect by engagement with the walls of said recesses a relative separation of the portions of the holder, means for limiting the movement of the driver to cause the head portion of the tack to remain within the tack holder at the end of the driving operation, and means for effecting relative movement ofthe holder and the work after the driving of a tack, said driver being larger in cross section than the head of the tack and so controlled as to cause the driver at the end of its driving movement to separate the portions of the holder sufficiently to provide -av free outlet passage for the tack and to maintain such separation until the holder is clear of the tack in the relative movement of the holder and the work after the tack driving operation.

9. In mechanism of: the class described, a

tack holder comprising relatively separable portions constructed to position a tack be tween them, tack driving means, and means for moving the tack holder laterally of the tack to withdraw it from the tack aft-er the driving operation, said driving means being so'construct'ed and operated as to force the tack only partially out or the holder in the.

drivin operation and to maintain the norm r u tions of the holder separated SUFl-Qlfilltlj to provide an outlet passage for the tack oi such wldth as to prevent any displacing action of the holder upon the tack during the withdrawing movement or the holder.

10. In mechanism of the class described, a tack holder comprising relatively separable portions having opposed recesses for holding a tack, yieldable means for relatively forcing said portions of the holder toward each other while permitting their relative separation in the tack driving operation, a tack driver, means for operating said driver, means for limiting the movement of the driver to cause the head portion of the tack to remain between the two portions of the maintain such relative separation of the portions of the holder as to provide a free outlet passage for the tack until the holder is clear or" the tack. V

11. In mechanism of the class described, a tack holder comprising'relatively separable portions having opposed recesses with tapered walls for holding and guiding a tack, yieldable means for relatively forcing said portions of the holder toward each other while permitting their relative separation in the tack driving operation, a tack driver, means for operating said driver to force the tack into the work and to effect by engagement with the walls of said recesses a rel ative separation of the portions of the holder, means for limiting the movement of the driver to cause the head portion of the tack to remain within the tack holder at the end of the driving operation, and means for moving the tack holder laterally of the tack to withdraw it from the tack after the driving operation and while the driver is substantially at the end of its driving movement, said driver beinglarger in cross section than the head of the tack to cause the driver to maintain such relative separation of the portions of the holder as to provide a free outlet passage for the head of the tack until the holder is clear of the tack.

12. In mechanism for securing the upper of a turn shoe in pulled-over position, the combination with shoe positioning means, of a tack holder movable transversely of the edge of the shoe bottom into and out of position for the driving of a tack, said holder comprising relatively separable portions constructed to position a tack between them, a tack driver, means for operating said driver, and means for limiting the movement of the driver to cause the tack to be driven only partly through the sole of the shoe with a portion of the tack left upstanding from the work and within the tack holder, said driver and holder being constructed and arranged to cause the'driver to maintain such relative separation of the portions of the holder as to provide an outlet passage for the tack of a width to prevent any displacing action of the holder on the tack during the movement of the holder to clear the tack.

13. In tacking mechanism, the combination with work positioning means, of a tack holder comprising relatively separable parts for holding and guiding a tack, a tack driver, means for operating said driver to drive a tack only partially out of the holder and into the work, and means for effecting relative movement between the work and said tack holder and driver laterally of the tack to clear the tack from the holder when the driver is substantially at the end of its driving movement, the parts of said tack holder having walls with tapering inner faces elongated lengthwise of the driver to be wedged. apart by the driver and formed to cooperate with the driver to provide a free outlet between the parts of the holder for the head of the tack in said relative movement to clear the tack from the holder.

In testimony whereof I have signed my name to this. specification.

EDGAR E. ROWE.

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