US2176180A - Heel building machine - Google Patents

Description

Oct. 17, 1939; w HUBBARD 2,176,180

HEEL. BUILDING MACHINE Filed Jan. 28, 1937 5 Sheets-Sheet 1 Oct. 17, 1939. w HUBBARD I 2,176,180

HEEL BUILDI NG MACHINE Filed Jan. 28, 1937 5 Sheets-Sheet 2 Fig. 2.

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Oct. 17, 1939. w, HUBBARQ 2,176,180

' HEEL BUILDING momma F iled Jan. 28, 1937 5 Sheets-Sheet 3 W. HUBBARD HEEL BUILDING MACHINE Filed Jan. 28, 1937 5 Sheets-Sheet 4 Oct. 17, 1939. w HUBBARD- 2,176,180

HEEL BUILDING MACHINE Filed Jan. 28, 1957 5 Sheets-Sheet 5 146 //v VENTUFFL Patented Oct. 17, 1939 Mi UNITED. STATES PATENT OFFICE I HEEL BUILDING MACHINE William Hubbard, Dolgeville, N. Y., assignor to United Shoe Machinery Corporation, Paterson, N. J., a corporation of New Jersey Application January 28, 1937, Serial No. 122,810

8 Claims.

- subjected to pressure, applied by power, and held under pressure while one or more heel building nails is, or are, driven.

It is the object of the invention to provide an improved machine of this type the use of which will insure the production of accurate heels of high quality with a minimum requirement for skill and experience on the part of the operator.

With this in view, the illustrated machine embodies an improved heel form comprising a set of heel engaging jaws which are yieldingly bodily depressible in response to downward pressure. This eliminates inaccuracies in lift alinement which are liable to occur with jaws designed to yield outward when the lifts are forcibly pressed down in the form, while retaining the advantage that the edges of the lifts are not objectionably marked by their pressure against the jaws. Further insurance against detrimental deformation of the edges of the lifts is provided by so hanging the jaws upon pivotally mounted arms that as the jaws are depressed their upper ends move outward and enlarge the upper portion of the form proportionately as the larger lifts of the heel are pressed down into it.

Further features of improvement relating to detailed description of an illustrative machine,

to be read in connection with the accompanying drawings, in which Fig. l is a view in front elevation of a heel building machine embodying the invention;

Fig. 2 is a view partly in side elevation and partly in vertical section;

Fig. 3 is a plan view of the machine with the presser foot removed;

Fig. 4 is a view in rear elevation of the spring operated cam control mechanism for app-lying pressure to a built-up heel;

Fig. 5 shows a detail of the clutch control mechanism;

Fig, 6 is a view in elevation of a built-up heel after the heel building nail has been driven;

Fig. 7 is a view in front elevation of the paste applying mechanism;

Fig. 8 is a view in vertical section through the VIII of Fig. ...and,

Fig, 9 is a vertical sectional View of a detail of the form jaw mounting, taken upon the line 1XIX of Fig. 3.

In the drawings, It] indicates a stationary base or frame to which may be secured by bolts l2 5. the base member M of a heel press, for example as that described and claimed in my copending application Serial No. 122,811, filed concurrently herewith.

Supported upon the top of the frame 10 is a 10,

plied to the pile of lifts and a heel building nail 55:

is driven through them. The heel l8 resulting from this operation is illustrated in Fig. 6.

The mechanism for applying pressure to the assembled lifts and driving the heel building nail through is controlled and operated by concentric, horizontal cams 20 and 22, respectively. These cams are fixed to each other by screws 24 and constitute a rotary unit having a hub 26 provided with upper and lower bushings 28, 30 which are journaled upon an upright shaft 32 (see Fig. 2). The shaft 32 rotates in stationary upper and lower bearings 34 and 36 respectively and has secured to it near its lower end a bevel gear 38 which is driven by a pinion 40 secured to a drive shaft 42 carrying tight and loose pulleys 44, 46 to receive a driving belt from any suitable source of power.

The cam unit 20, 22 is supported by a ball bearing 48 which runs in a stationary raceway 50 mounted in the base of the machine and the cam unit may be connected at will to the shaft 32, which runs continuously when the driving belt is upon the tight pulley. The mechanism for effecting this connection comprises a sleeve 52 which loosely surrounds the shaft 32 and is coupled at 54 to the hub 26 by a series of interlocking notches and projections in such a manner that the sleeve 52 can slide vertically relatively to the hub but cannot rotate relatively thereto, A spring 56 surrounding the shaft 32 tends at all times to raise the sleeve and cause teeth 58, which are cut in its upper end, to engage similar teeth 60, which are cut in the lower end of a clutch member 62 pinned to the shaft 32, to effect a driving connection between the shaft and the cam unit.

Resting upon and supported by the cam 20 is a cam roll 64 carried by the lower end of a slide 66 which is guided for vertical movement in ways formed in the-rear face of a'vertical stationary web 68 which extends from side to side of the frame I0.

Projecting rearward from the slide 66 are brackets I in which are secured, by set screws I2, the lower ends of a pair of vertical rods I4 the upper ends of which are guided in bushings I6 adjustably threaded through the top of the machine frame I0. The rods I4 are surrounded by heavy pressure springs I8 the tension of which can be adjusted by turning the bushings I6 and which cause the cam roll 64 to bear down heavily in a direct line upon the cam 20.

In the upper end of the slide 66 is formed a bearing 80 in which is swiveled the lower end of a rotatable standard 82 which is guided for vertical sliding and rotary movement by a bearing 84 bolted down upon the top of the machine frame. A collar 86, pinned to the lower end of the standard 82, has a downwardly projecting lug 88 which limits the rotary movement of the standard 82 relative to the slide 66.

To the upper end of the standard 82 is secured a block 90 which extends forward and provides a bearing for an adjusting screw 94 which is threaded into a presser foot carrier 96 splined at 8| to the standard 82 so that it can be adjusted vertically thereon but is constrained to rotate therewith. A handle 98 enables the operator to swing the presser foot carrier and the standard about the axis of the latter within the limits permitted by the lug 88.

Mounted upon the carrier 86, with a bolt and slot connection I00 to permit forward and rearward adjustment, is a presser foot supporting arm I02 to which is pivoted at I04 a presser foot I06 conforming approximately to the shape of the heel to be built. A screw I08 threaded through the support I02 and bearing upon the top of the presser foot provides for angular adjustment of the latter around the pivot I04 and helps sustain the pressure applied to the heel. It will be apparent that when a high portion of the cam 20 is beneath the roll 64 the pressure springs I8 will be compressed and the slide and presser foot carried thereby will be raised to permit a heel to be assembled in the form. When a low portion of the cam comes beneath the roll 64 the springs 18 are permitted to expand and apply pressure to the heel and to hold it while the heel building nail is driven.

The driving of the heel building nail is accomplished by a nail driver IIO secured in a driver block H2 which is, in turn, secured in a driver head H4 mounted upon the face of a vertically movable slide H6 in the lower end of which is journaled a cam roll II8 engaging the cam 22. The driver head I I4 is secured to the slide I I6 by a bolt I20 which passes through a slot I22 in the head and is threaded into the slide, an adjustable supporting screw I24 serving to adjust the vertical position of the driver and to transmit the driving force from the slide II6 to the driver head H4.

The upper end of the nail driver H0 is guided in a nail tube 526 of which the upper end is normally flush with the surface of the heel forming table I6 and the lower end is mounted in a plate I28 which is slidable upon vertical studs I30 screwed into the frame I0, as best shown in Fig. 8. Springs I32 normally hold the plate I28 down against the heads of the studs but permit it to yield upward when struck by the driver block I I2 which will be so adjusted that it will, near the end of its upward movement, engage the plate I28 and elevate the nail tube I26 sufficiently to loosen the heel from the form table I6.

The heel form comprises a breast block and four side jaws. The breast block, which is seen at I34, has a rearwardly extending base portion I36 which may be adjusted toward the front or the rear of the form table and held in the adjusted position. by clamping plates I38 tightened by screws I40.

The following description will apply to any one of the four side jaws of the form. A base plate I42, resting upon the form table I6, is provided with pins I44 extending downward into a guide slot I46 formed in the table and a bracket member I48 is held down upon the base plate by a bolt I50 which passes through a slot I52 in the base plate and through the slot I46 in the table I6 against the under side of which the head of the bolt bears. A vertical T-slot I54 in an upright portion I56 of the bracket I48 receives the head I58 of a bolt I60 by means of which a slotted block I62 is secured at any desired height upon the face of the upright portion I56.

Pivoted at I64 in the slot in the block IE2 is an arm I66 sustained by a spring I68 and having pivoted in its free end at I70 the upper end of a heel engaging jaw I72, the lower end of which extends into an opening I74 through the table I6. The end portion of the plate I42 is formed with a notch I'I6 which acts as a guide for the rear edge of the jaw I I2 when the jaw is depressed by downward pressure, against the tension of the spring I68.

From the foregoing, it will be apparent that the heel form may be readily adjusted to heels of all sizes and shapes. By loosening the bolt I60 the block I62, carrying the pivot I64, may be adjusted vertically to vary the depth of the form. By loosening the bolt I50 each jaw unit may, as a whole, be adjusted along the slot I46 radially of the form and also, by relative movement of the bracket member I48 and the base plate I42, the inclination of the heel engaging jaw II2 may be varied as desired without affecting the ability of the jaw to yield downward against the tension of its supporting spring I68. Since the pivot I64 is spaced above the table I6 a distance equal to the depth of the form, the upper end of the jaw, when it is depressed, will move slightly outward and the upper portion of the form will be enlarged proportionately as the larger, upper lifts of the heel are pressed down into it, thus avoiding detrimental pressure of the edges of the jaws upon the edges of the lifts.

By reason of the swivel connection at 80 between the standard 82 and the slide 66, the presser foot I06 may readily be swung aside from over the form to afford a clear, unobstructed space in which the operator can assemble the heel lifts, after inserting a nail in the nail tube I26. After the lifts are assembled in the form the operator grasps the handle 98 and swings the presser foot over the form ready to be lowered by power to apply pressure to the assembled lifts. The engagement of the clutch members 52 and 62 to start the power operation of the machine is controlled by a starting handle I18 (see Figs. 1, 3 and affixed to the upper end of an upright shaft I80 to the lower end of which is also afiixed a swinging arm I82. Secured in the free end of the arm I82 is a downwardly projecting pin I84 which engages in a recess in a slide I86 which is horizontally movable in a bearing I88 supported by the frame I 0 and having its axis arranged to intersect the axis ofthe shaft 32.

A compression spring I 90, the tension of which is adjustable by means of a screw I92, tends continuously to move the slide I86 toward the shaft 32 but can be compressed by swinging the handle H8 in a direction to cause the slide to be retracted.

At the end of the slide I a roll I94 is loosely mounted upon a pin I95 which is secured in the slide and has a frusto-conical head I 98. The roll I94 is adapted to engage in a cam slot 200 formed in the sleeve 52 and so shaped as automatically to cause depression of the sleeve against the force of the spring 56 to disengage the clutch teeth 58 from the clutch teeth 60 when the cam unit 20, 22 has rotated to the position which it should occupy when the machine is stopped. When the starting handle I18 is moved the roll I94 is retracted from the cam slot 200 and the spring 56 immediately causes engagement of the clutch and rotation of the cam unit through one revolution. In order to prevent this from occurring if the presser foot is not over the heel form and in proper register with the heel blank therein, a projection 202 is provided upon the starting handle I!!! and arranged to engage the head of a screw 204 adjustably threaded into the end of a sliding pin 206, the screw being secured in its adjusted position in the pin by lock nut 200.' The pin is guided for sliding movement in a horizontal guide 2 I0 against the force of a compression spring 2 I2 which aids in returning the starting handle III! to inoperative position when it is released.

The tip of the pin 206 is adapted to enter a vertical slot or keyway 2I4 formed in the standard 82 when the presser foot is over the heel form but not when it is in any other position. Consequently the projection 202 and the pin 206 constitute a safety lock preventing the starting of the machine except under proper conditions.

Mounted at the right-hand side of the machine is a paste tank 2I6 in which rotates, upon a shaft 2I8, a lower paste applying roll 220. Slotted uprights 222 arising from the sides of the tank 2 I6 afford guides for an upper paste applying roll 224 which is normally drawn down into contact with the lower roll 220 by springs 226 which are capable of yielding to permit a heel lift to pass between the rolls. Paste is picked up by the lower roll and transferred to the upper roll when the two are in contact. When the operator passes a lift between the rolls, as shown at 228 in Fig. 7, both sides of the lift are coated uniformly with paste and in the ordinary operation of heel building the alternate lifts of heels will be thus pasted, the intermediate lifts being left dry.

The lower paste roll shaft 2 I8 is coupled at 230 to the hub of a gear 232 which is driven by a pinion 234 fixed upon a shaft 236 journaled in bearings 23B, 240 upon a bracket 242 bolted to the frame I0 of the machine. The shaft 236 is driven continuously from the shaft 42 by a sprocket chain 244.

At the under side of the cam 22, and integral therewith, there is a cam 92 which is designated by the same reference numeral in my copending application Serial No. 122,811, hereinbefore referred to, and serves to operate the heel press described and claimed in that application.

Having described my invention, what is claimed as new and is desired to be secured by Letters Patent of the United States is:

1. In a heel building machine, an upwardly open heel form comprising a stationary table and a plurality of heel engaging jaws which extend upward from the table and are yieldingly depressible bodily relatively to the table in response to downward pressure upon said jaws.

2. In a heel building machine, a heel form comprising a heel engaging jaw which is yieldingly 'depressib-le in response to downward pressure,

and means for moving the upper portion of the jaw outwardly of the form when the jaw is depressed.

3. In a heel building machine, a horizontal, pivotally mounted, spring supported arm, a heel form jaw pivotally suspended from said arm, and a normally stationary guide engaging the back 0 the jaw below the arm.

4. In a heel building machine, a heel form comprising a plurality of heel engaging jaws which are yieldingly depressible in response to downward pressure and means for causing the upper portions of all the jaws to move outward, to enlarge the upper portion of the form, when the jaws are depressed.

5. In a heel building machine, a heel formcomprising a table which constitutes the bottom of the form, a plurality of radially disposed arms each having its outer end pivotally supported about the table at a distance at least equal to the depth of the form, and a heel form jaw pivoted to the inner end of each arm and extending downward into the table.

6. In a heel building machine, a heel form, a presser foot for applying pressure to a heel in the form, a vertically movable slide carrying the presser foot, a horizontally rotatable cam directly supporting the slide, and a pressure spring forcing the slide downward upon the cam.

7. In a heel building machine, a heel form, a presser foot for applying pressure to a heel in the form, a vertically movable slide carrying the presser foot, a horizontally rotatable cam positioned beneath and directly in line with the slide, a pressure spring forcing the slide downward upon the cam, a second cam concentric with the first, a second slide bearing upon the second cam and movable parallel to the first slide, and a nail driver carried by the second slide.

8. In a heel building machine, a heel form, a pair of concentric cams rotatable about a vertical axis, a pair of parallel, vertically movable slides resting directly upon said cams respectively, a nail driver carried by one of the slides and positively actuated upward by the corresponding cam, a pair of pressure springs bearing down on the other slide, and a presser foot carried by said other slide and operable to apply spring pressure downward upon a heel in the form.

WILLIAM HUBBARD.

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