US2485596A - Shoe jack - Google Patents

Description

Get. 25, 1949. c. F. HAMMANN SHOE JACK Original: Filed Qct. 20, 1943 Oct. 25, 194 c. F. HAMMANN SHOE JACK 5 Sheets-Sheet 1 Original Filed Oct. 20, 1943 lllllllllllll I... llll II III] |l1l|l|ll |L C. F. HAMMANN SHOE JACK Get; 25, 1949.

5 Sheets-Sheet 3 Original Filed Oct. 20, 1943 IN VEN TOR. 7 WWW Oct. 25, '1949. c. F. HAMMANN SHOE JACK Original Filed Oct. 20. 1943 5 Sheets-Sheet 4 2' v INVENTIOR. BY v i fl Oct. 25, 1949. c. F. HAMMANN 2,485,596

sX-IQI: JACK Original Filed 001;. 20, 1943 5 Sheets-Sheet 5 INVENTOR.

Patented Oct. 25, 1949 UNITED STATES PATENT OFFICE SHOE JACK Carl F. Hammann, Boston, Mass., assignor to North American Research Corporation, Cambridge, Mass., a corporation of Massachusetts Claims.

This invention relates to apparatus for applying plastic material to articles, and more particularly to machines for applying filler material to the bottoms of shoes.

The device herein described is a shoe holding mechanism especially suitable for use in an automatic shoe filler machine of the type described in copending application Serial No. 506,931, filed October 20, 1943, which issued on November 2, 1948, as Patent No. 2,452,565, of which this application is a division. For subject matter shown and described but not claimed in this and parent application, reference is made to other copending divisional applications Serial No. 762,135 filed July 19, 1947, and Serial No. 762,136, filed July 19, 1947.

The object of this invention is to provide a shoe holding device which holds a shoe securely but permits easy insertion and removal of the shoe, which serves to gauge the shoe size for further operations by the machine, which adjusts itself readily to shoes of different sizes and which, with all these advantages, is relatively simple in construction.

These and other objects, aspects and features will be more fully apparent from the following description of several practical embodiments i1- lustrating the genus of the invention. The description refers to drawings in'which:

Fig. 1 is a top plan view, partly in section, of a filler machine employing this invention;

Fig. 2 is a section on line 2-2 of Fig. 1 omitting the lower portion of the base of the machine and the driving motor housed therein;

Fig. 3 is a section on line 3--3 of Fig. 2 with parts of the shoe-supporting jack mechanism removed;

Fig. 4 is a section on line 44 of Fig. 1 with the filler-spreading and distributing mechanism shown in elevation;

Fig. 5 shows a front and side elevation of the horizontal latch which is part of the jack mecha nism shown in Fig. 4;

Fig. 6 is an elevation of the vertical latch also shown in Fig. 4;

Fig. 7 is a top view of the cam mechanism for controlling the jack mechanism, also shown in Fig. 4

Fig. 8 is a partial section on line 88 of Fig. 4, through the jack mechanism;

Fig. 9 is a detail view of the linkage between shoe jack and filler mechanisms as shown in Fig. 2, with the frame omitted;

Fig. 10 is a section on line Illlll of Fig. 9;

Fig. 11 is a section on line ll--|I of Fig. 9; and

Fig. 12 is a section on line [2-42 of Fig. 9.

Referring first to Fig. 1, the automatic shoe filling machine, with which this invention is illustrated, employs a turret head l4, driven by a Geneva motion, to move the shoes to the various operating stations. The driving arrangement for the machine and the mechanisms for depositing a measured quantity of filler on the bottom of the shoe and for spreading and ironing the material, are more fully described in the copending applications referred to above. The machine employs five shoe supporting means, or jacks, as here shown, mounted at five equally spaced stations a, b, c, d and e (Fig. 1) upon the top side of turret head I4. One of said jack mechanisms may occupy position a. at a loading or receiving station A during a period of rest of the turret head, as shown.

While this jack dwells at station A, a last with a partly made shoe S upon it is placed in position thereon, bottom up, as shown in Fig. 4, the jack mechanism being at that time in unlocked condition so that it can be adjusted to fit the size of the lasted shoe.

The first step of the turret head then moves the loaded jack into idle position b (Fig. 1) and during this movement the loaded jack is locked in its adjusted condition.

The second step of the turret head brings the loaded jack into position at c (Fig. 1). While the jack and shoe dwell in this position a predetermined metered amount of filler material, of a quantity proportionate to the size of the shoe whatever that may be, is automatically deposited upon the forepart of the latter by mechanism indicated generally at C in Figs. 1 and 2.

The third step of the turret head moves the loaded jack into position at d (Fig. 1) and While it dwells in this position the deposited filler material is spread, ironed and distributed over the forepart of the shoe by the mechanism that is indicated generally at D in Figs. 1 and 4.

The fourth step of the turret head shifts the jack bearing the filled shoe into position e at a delivery station E and unlocks the jack so that the lastedand filled shoes may be removed from the machine while the jack dwells at station E1.

The fifth step of the turret head completes one revolution of the same and restores the now empty and unlocked jack to position a at the loading station A.

Each jack mechanism comprises a heel rest 73 (Figs. 1 and 4) mounted to slide radially in ways 14 provided upon the top side of turret head I4 and yieldingly urged toward the aXis of the latter by a pair of springs 15. Upon its under side, and near its outer end, each heel-rest slide has a depending tubular boss 16 within which is fixed a pintle 11 provided at its lower end with an abutment roll 18 (Figs. 3, 4 and 9). The pintle H is fixed within boss 76 by a transverse pin 16a with which the outer ends of the springs 15 are connected, the outer end portions of said springs loosely occupying grooves provided upon the bottom side of the heel-rest as shown in Fig. 8. The inner ends of the springsare fastened to the top of the turret head as shown in Fig. 1.

The boss 76 occupies a radial slot 19 (Fig. 3) formed in turret head I4 and the engagement of the boss with the inner end of this slot limits the inward movement of the heel-rest under the influence of springs 15.

Upon its top side each heel-rest has a V-shaped heel-receiving crotch 88 (Figs. 1, 4 and8) which is inclined downwardly toward, and faces, the aXis of the turret head and into which the heel end of a lasted shoe is wedged so that the shoe is disposed bottom side uppermostand extends upwardly and inwardly therefrom toward the axis of the turret head, with the inner toe end of the lasted shoe abutting the hub of the turret head and supported against the under side of gauge by a toe-rest herein shown as including a roll 8!. This roll is supported for rotation on a horizontal axis which is perpendicular to the medial line of the lasted shoe, the roll being mounted within the bifurcated upper end of a slide 82 mounted within vertical ways provided in hub [4a of the turret head. The lower portion of slide 82 has avertical bore within which is arranged a coiled spring 83 by which the slide is yieldingly urged upwardly toward, and sometimes against, a stop shoulder 84 (Fig. 2), the lower end of said spring abutting the top of the turret head.

Adjacent to the upper end thereof the hub of the turret head has a plurality of radial lugs MB (Figs. 1 and 4) which provide between them V-shaped sockets one of which is disposed immediately above each roll ill to receive within it, and hold against sidewise displacement, the toe end of the lasted shoe which is in engagement with said roll.

When an empty jack mechanism arrives at the loading station A, its roll-carrying slide 82 is supported in position against its stop 84 by spring 83 as shown in Fig. 2, while the heel-rest 13 is held by springs l5 at the limit of its inward movement with boss 16 against the inner end of its slot 79 and roll 78 at the lower end thereof occupying an inoperative position as shown in Figs. 2 and 3.

While the empty jack mechanism dwells at the loading station A (Fig. 1) the operator places the heel end of a lasted shoe within and against the crotch 89 of the heel-rest slide and forces the latter radially outwardly until it is possible to shove the toe end of the lasted shoe into position against the hub of the turret head between the gauge plate 5| and the toe-supporting roll 8| as shown in Fig. 4, the operator adjusting the heel end vertically relatively to the heelrest, if necessary, to set the bottom of the fore-v part in an approximately horizontal position. When properly placed in position the toe end of the lasted shoe will occupy a position between two of the lugs Mb by which it is held against sidewise displacement. When the lasted shoe is in position the roll 18, which was displaced radially outwardly when the lasted shoe was applied to the jack mechanism, occupies an operative position with respect to a cam lever I82 (Fig. 3). This lever is actuated by roll 18 when the respective jack mechanism arrives at the position 0.

The displacement of cam lever I82 by roll 18- eifects adjustment of the filler metering valve, and operates the filler depositing mechanism, as more fully described in co-pending application, SerialNo. 762,135, filed July 19, 1947, so as to deposit on the shoe sole an amount of filler proportionate to the size of the shoe, while the loaded jack mechanism dwells at c.

As the loaded jack mechanism is moved from the position at a (Fig. 1) to the position at b the two slides 13 and 82 (Fig. 4) are automatically locked in their adjusted positions as presently to be described and remain so locked until the loaded jack moves from the position at d (Fig. 1) to the position at e, whereupon they are automatically unlocked to permit removal of the filled shoe and its last at station E.

The mechanism for locking the two slides 13 and 82 of each jack mechanism in the positions to which they are adjusted while at station A by application thereto of the lasted shoe comprises two spring pressed latches 85 and 86 (Figs. 4, 6, and 7), the former cooperating with the roll-carrying slide 82 and the latter with the heel-rest slide 13.

v The latch 85 is a slide made with a base section 81 slidably mounted within a radial slot 88 (Fig. 3) formed in turret head M, the base portion being provided upon opposite sides thereof with flanges seated upon the top surface of the turret head. At its inner end the base section 81 is provided with a cam roll 89 which is urged by a spring 90 toward a cam 9| that is fastened rigidly to the stationary pivot post 9 by a set screw 92 (Fig. '7). The outer end of the base 81 of latch slide '85 has a pair of blade extensions 93 (Figs. 6 and 7) made at their outer ends with inclined cam surfaces 94 cooperating with complementary cam surfaces 95 (Fig. 5) provided upon latch 86 upon opposite sides thereof. The blade extensions 93 'are slidably mounted within a pair of grooves 96 (Fig. 3)

Fig. 4.

The latch 86 is loosely fitted within this pocket 91 together with a pair of springs 98 by which the latch is urged upwardly. As shown in Figs. 4 and 5 the upper end of latch 86 has a radially disposed rack of teeth 98 cooperating with a radial rack of teeth 99 provided upon the bottom of heel-rest slide 13. As shown in Figs. 4 and 6 the latch 85 is provided with a vertical rack of teeth I08 cooperating with a vertical rack of teeth l0! provided upon toe-rest slide 82.

The fixed cam 9| (Fig. 7) is so constructed that, as each jack mechanism moves from d to e, it acts through cam roll 89 to shift latch 85 radially outwardly against the pressure of its spring 98 thereby unlocking toe-rest slide 82, and at the same time the latch 85, through its cam blades 93, depresses latch 86 :thereby unlocking heel-rest slide 13. Thereafter the cam 9| maintains both slides 82 and 73 unlocked until the jack mechanism moves from a to b whereupon the cam permits the spring pressed latches to reengage and lock the slides, which remain thus locked until the jack mechanism again moves from d to e.

As will be clear from Figs. 1 and 4 the gauge plate 5| provides a projecting circular segmental flange which occupies a stationary position ab ve the circular path of the forepart of the shoe, and is of such angular length that it engages and holds the forepart in position until the loaded jack departs from position b.

Adjacent to position there is provided the member I02 referred to above (Figs. 2, 3, 9 and 10). This member has the form of a lever and is pivotally mounted at I03 upon the top wall I2 of the base of the machine and normally held by a spring I04 against a stop I05 which may be the flange at the lower end of one of the posts 50. While occupying this normal position the cam face I02a 0f lever I02 is just outside of the path of the cam rolls 18 of the jack mechanism when the jacks are empty. When, however, a jack mechanism holding a lasted shoe arrives at position 0 its cam roll It occupies an operative position farther away from the axis of the turret head, contacts face I02a, and swings cam lever I02 outwardly on its pivot I03 an angular distance proportionate to the size of the shoe on said jack mechanism. It will be observed that the outward radial displacement of cam rolls I8, brought about when the lasted shoes are placed upon the jack mechanisms at station A, varies with the size of the shoes.

When the loaded jack mechanism departs from the position beneath the filler depositing mechanism C, the spring I04 (Fig. 3) restores lever I02 to its normal position, the nose at the free end of said lever wiping idly across the outer beveled end of latch abutment 151 as said lever is thus returned.

After a predetermined quantity of filler material has been delivered on to the shoe at station C (Fig. 1) the next step movement of the turret head brings the shoe into position opposite the mechanism D which spreads, irons and distributes the deposited filler material within the forepart cavity of the shoe, as more fully described in copending application, Serial No. 762,136, filed July 19, 1947.

The jack now moves into position 6 where it is unlocked so that the shoe can be removed. The next movement returns the jack, still unlocked, into position a where it is ready to receive another shoe.

It should be understood that the present disclosure is for the purpose of illustration only and that this invention includes all modifications and equivalents which fall within the scope of the appended claims.

What is claimed is:

1. In a machine of the type described a shoe jack adapted to support a shoe bottom-side uppermost, comprising a base, a vertically movable spring-supported toe rest mounted on said base, a toe latch member adapted rigidly to support said toe rest, a heel rest supported on said 'base for spring urged movement towards and in alignment with said toe rest, a heel latch member adapted for opposing movement of said heel rest awa from said toe rest, and means for locking said latch members.

2. In a machine of the type described, the combination of a shoe jack according to claim 1 with a pivot post rotatably supporting said base, a control cam fixed to said post, and means 0perated by said cam for actuating said locking means.

3. A shoe jack according to claim 1 wherein said locking means includes a follower carried by said toe latch member and wherein said toe latch member is provided with cam means associated with said heel latch member, in combination with a driven control cam actuating said follower being adapted lIlO move said toe latch member into position unlocking said toe rest and to move with the toe latch member said cam means into position unlocking said heel latch.

4. A shoe jack according to claim 1 wherein said toe rest includes a gauge flange mounted above said toe rest on said base and extending towards said heel rest, whereby the toe end of a shoe can be inserted between said flange and said toe rest while said toe rest is unlocked.

5. In a machine of the type described a shoe jack adapted to support a lasted shoe bottomside uppermost, comprising a base, a vertically movable spring-supported toe rest mounrted on said base, a toe latch member adapted rigidly to support said toe rest, a heel-rest supported on said base for spring-urged movement towards and in alignment with said toe rest, a heel latch member adapted for opposing movement of said heelrest away from said, toe rest, and means for simultaneously locking and unlocking said latch members.

CARL F. HAMMANN.

No references cited.

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