US2422390A - Shoe press - Google Patents

Description

P. BRAUNER June 17, 1947.

SHOE PRESS Filed June 12,

3 sheetssheet 1 June 17, i947. P, BRAUNER suon mess Filed June 12, 194e 3 Sheets-Sheet 2 1N VHV TOR.

June i7, 194?. P BRAUNER 2,422,390

` sBoE PRESS 3 Sheets-Sheet 3 Filed Juner 12 1946 Patented June 17, 1947 UNITED STATES i PATENT OFFICE 8 Claims.

This invention relates to improvements in shoe presses of the general type which have an adjustable post between which and an inflatable pad a suitably supported shoe upper structure and a sole element may be eiectively combined by pressure applied as a result of inflation of the pad. More particularly the invention provides improvements in the post and its mounting means in such a press whereby the work more readily and quickly may be inserted in and removed from the press and may be effectively positioned and conditioned in the press for a more tho-rough and efficient application thereto of the combining pressure.

It is among the objects of the. invention to provide a shoe press including an inflatable pad, and a work engaging post having means thereon for carrying the work and which is movable to swing the work carrying means between a loading position and a. pressing position, and is movable axially in the pressing position to thrust the work on the work carrier into unyielding engagement with the pad prior to inflation of the pad.

Another object is to provide a -shoe press including an inliatable pad, and a work engaging post having means thereon for carrying the work and which constantly is biased to swing the work carrying means laterally to a loading position whenever the wo-rk on the work carrying means is clear of the inflatable pad.

Still another object is to provide a shoe press including an iniiatable pad, and a work-holding post constantly biased laterally to a loading position and constantly rection away from the pad, there being means for thrusting the post axially in opposition to said axial bias prior to inflation of the pad.

Yet another object is to provide a shoe press including an inflatable pad, and a work-holding post constantly biased axially in general direction away from the pad, there being mean-s for inflating the pad and means for thrusting the post axially in opposition to its said bias in response to actuation of said inflating means and prior to actual ination of the pad.

It is, moreover, my purpose ally to improve the structure and eiectiveness of shoe pres-ses.

In the accompanying drawings:

Fig. 1 is a front elevation of a two-jack shoe press embodying features of my invention;

Fig. 2 is a side elevation of the upper portion of the left hand jack of Fig. 1, on a larger scale, and with the work holder retracted and clear of the pad, as just prior to swinging thereof to its lo-ading position;

Fig. 3 is a cross-sectional view on line 3-3 of Fig. 2;

and object generoperational Fig. 4 is a cross-sectional view on line 4 4 of Fig. 1, on a larger scale;

biased axially in general di- Fig. 5 is a cross-sectional view on line 5-5 of Fig. 2, on a larger scale;

Fig. 6 is an elevation of the lower end of one of the work-holding posts with a mo-dined form of last-holder thereon; and

Fig. 7 is a cross-sectional view, partly diagrammatic, illustrating a pressure-operated postactuating means.

Referring .to the drawings, a two-jack shoe press is shown in Fig. l, mounted upon the table lil of a stand l2. As each jack or press is the same, only one is herein described in detail, although the operating mechanism for the two jacks preferably is such that one press is conditioned for unloading and re-loading while the other is active on a shoe engaged therein.

Each jack has a base I4 secured as by screws IB to the table l0, and any suitable inflatable pad I8 is fixed in position on each base I4 with its flexible top wall I9 adapted to rise and fall with inflation and deflation of the pad. Any usual or suitable means may be employed for admitting fluid to the interior of the pad, and for exhausting duid from the pad following each pressing operation.v In the two-jack press illustrated, the control is in response to depression of one or the other of the pedals 20, 22 of a doublertreadle 24 which is connected to the outer end of an operating rock shaft 26. Depression of one pedal causes ination oi one pad while'the other continues deflated, and depression oi the other pedal produces the same result in reverse.

The base Ill of each jack has an integral vertical part 2B rising to a suitable height above the pad I8, rearward thereof, with its upper end portion enlarged and provided with Referring more particularly to FigsZ and 4,`

the shank 32 has a cylindrical head 38 formed'at lits inner end within which a sleeve 4% is rotatably slot G2 in its wall,

mounted, the head 38 having a and the sleeve 4U having a pin M projecting into the slot and limiting the rotation ofthe 'sleeve in the head by engagement with the opposite ends of slot 42. A coil 'spring has one end connected to the head and the other end connected tothe sleeve, withthe spring constantly biasing the sleeve in direction to bring 4l against one end wall of'slot 42.

Sleeve 40 extends 38, and the projecting part of the sleeve carries at its end a' generally cylindrical guide portion 48 whoseV axis is'at right angles tothe axis of sleeve 40. A post 5U extends loosely and slidably through the'y guide portion 48, and hasits-lower the generally rectangular horizontal hole 33 therethrough con' at Sli. The shank by a set screw 3% 46 within head Tillpin beyond the inner end of head region threaded as at 52 for screwing into the interiorly threaded collar 54 which is arranged below the guide portion 48. A hand wheel 55 is mounted on the extreme upper end of the post for manual adjustment of the post in collar 54.

ing in the usual heel socket of a last. In eithercase, the work-holding member readily may be mounted or replaced in holder by means of a headed stud 66 whose shank is insertible in and removable from registering holes in the holder 51 or in whichever work-holding lmember is mounted therein. Adjustable set screws 63 in the holder 51, on each side .of stud 66, may be adjusted to make the work-'holding member substantially rigid in holder 51 with selected degrees of inclination, if desired, relative to holder 51.

According to the invention, the post 5B, besides being manually adjustable by rotation of hand wheel 55, is bodily movable in axial directions by moving the sleeve V54| axially relative to the cylindrical guide 48. For this purpose, a thrust bar extends generally parallel with the axis of the main sleeve 4B, Yspaced a little above the cylindrical head 38. The inner end of the thrust bar hase pai-r of ears l2 depending at opposite sides 1E within sleeve 40 has oppositely projecting trunnions 1B thereon, each projecting through a slot 14 and through one of the ears 12 of thrust bar 10. A relatively strongr coil spring 8l! within sleeve 40 constantly biases the piston outwardly or away from post 5l) with the trunnions limiting the outward travel of the piston by engagement with the outer end walls of the slots 14.

The outer ends of a pair of toggle links 82, one at each side of sleeve it, are pivetally connected to the trunnions 18, as at 84. The inner end of each linl; 82 is pivotally connected at 86 to the outer end of one of the two toggle links 88, sa whose outer ends are pivotally connected respece tively to the cylindrical guide 48, as at 52, and to the postes'uppoitiiig sleeve 54, as at 95. The length of the slots 11| in sleeve 40 determines the amount of movement of sleeve 54 and post 5D which can be el'ected by actuation of thrust bar 10, and the inner limit of the s'lOtS preferably iS such that the toggle links 88, 90 will be slightlyV beyond an onecenter position when the thrust bar 1|! is in its innermost position.

The outer end of the thrust bar 1|! is swivelly connected at 9B to the upper end of a lever 98 which may be pivotd on any convenient fixed support which, as herein shown, is a rod or shaft mi] -fnounted within vthe rear hollow portion of base I4 with one end projecting out of the base and having lever 98 fixed thereon as at 99,

fIf desired, each lever 98 may be provided with means (not shown) for manual actuation of the lever. However, l' prefer that the actuation of levers 98, and of the' toggle mechanisms heretofor@ described, snail be automatic in response to actaton of the usual mechanism' for inlating and donating the pads 8. To this end, each pivot shaft |80' has thereon interiorly' of a base I4 a relatively short arm |02 which is equipped Preferably, the roller |04 is mounted in a yoke member I having a threadeds shank |63 extending loosely through the arm |02, with lock nuts il on the shank at each side of -vhe arm by means of^which the roller'may be adjusted toward or from the lever arm. VThe rear wall of base It is cut away to provide room for swinging of arm |52, and to facilitate adjustment 'of the roller.

A shaft I2 Yis mounted in the side walls of each base fS and extends across its hollow, with a cani il@ ixed on the shaft interiorly of the base'i'. The roller |04 rides on the periphery of the cani which has the inclined at cam sur-face i ifi and the concentric cam surface H4, with the latter surface constitutingV the high part 'of the cain. The lever operating mechanism for both jacks may be the same excepting that the cam H4 for one jack will be reversed with respect to the other cam, so that when one roller |54 is riding on the concentric surface Hit of one cam, the other roller |56 will be riding on the inclined 'at surwith a roller |04.

' face I lil of the other cam.

The cam H4 is free to rotate on shaft i! 2 by means of arm 6 xed to the cam and connected at its free end to an actuating rod or bar H8 which extends through the table- 0 and interiorly of stand l2, 'with its lower end connected to the rock bar |25 on the treadle rock shaft 26. There is a separate shaft H2, cam H4, arm H5 and rod or bar ||8 for each jack. Hence, when pedal 20 is depressed to inflate pad i8 of the left hand jack, for example, in Fig. l, the cams ||4 will be rocked in opposite directions. The concentric portion of the cam Hl for the left hand jack Will be moved into engagement with its roller |05, andthe roller on thecam Hd for the right hand jack will ride fromgthe concentric portion to the inclined nat portion of the cam. In consequence, lever 98 of one jackis actuated to straighten its togglerand to depress its post 55, and lever 98. of the other jack is permitted to swing in torggle-` breaking direction under the urge of its spring 80, thereby to elevate its post 5l) to a position where its spring 45 can swing the work holder Vto a loading DQsition beside the jack or press.

When pedal 22 is depressed, the operation es above described is reversed.

.It should beunderstood that the initial depression of a pedal I2li or 22 atiittes ,one Can to straighten the toggle of one jack, and simultaneously actuates the other Cam direction to permit breaking of the ,toggleof the other jack, before the control valve mo 'es enough to initiate ination of the pad of the l'irst mentioned jack and deflation of the pad ofthe second mentioned jack- Fig. 6 shows a modified form of Work holder in which a bar |22 is substituted for the member 60 of the previously describedapparatus, Bar |22 may be mounted in the holder 55 by means ofthe pin 66 and may be adjusted to a proper setting by the set screws 68, The bar has a spring-pressed pin |24 depending and normally biased by its Spring to .the eanted full ,line pOStion of Fig, d. The pin is adapted for insertion in the usual socket |25 of a last |258, with the pin forced, against its bias', to a` vertical position when in srerted in the socket |216, so that the pin bias tenis to swing the last to .bring its forepart against a toe abutment |50 adjustably depending from bar |22. Friction between the pin and the socket walls holds the. llast on the pin, with the forepart pressed against the toe abutment@ ACtuationof,v

the work is the same as 'described in connection with Figs. 1-5.

If desired, the actuation of the toggle of each jack may be accomplished by fluid pressure from the same source of fluid pressure which inilates the pads I 8. In Fig. '7, the sleeve 40 which guides a post 55) has the same piston 16 therein as that shown in Fig. 4. An exteriorly threaded disk |32 is screwed into the hollow of sleeve 40 to constitute an end wall of a cylinder chamber |34. Fluid under pressure is introduced into chamber |34 as through conduit |36 which has a flexible portion |36 to permit rotation of sleeve 40' by the spring d6 the same as described in connection with the apparatus of Figs. 1-5. When pressure fluid enters chamber |34 it propels piston 15 in direction to straighten the toggle, and when the cylinder is opened to atmosphere, the spring 50 breaks the toggle, as previously described.

Fluid under pressure, from any suitable source, may be controlled by a valve |38 (Fig. 7) which serves both to control the inflating and deflating of the pads I8 and to control the admission of pressure iiuid to the cylinder chambers |34, and the exhausting of those cylinders. As shown,

the valve comprises an outer casing |39 throughwhose wall extends the inlet conduit |48, the exhaust conduits |42, a conduit Hifi connected to one pad I8, and a Conduit |46 connected to the other pad IB. Also a conduit |48 through the outer casing connects through one conduit |36 with one of the cylinder chambers |34, and a conduit |50 through the outer casing connects through the other conduit |35 with the other cylinder chamber |34. A branch conduit 52 connects the two exhaust conduits |42 with a single exhaust conduit |43. A rotatable valve member |56 has the two grooves |58, lllin a face thereof, shown in Fig. 7, with groove |53 connecting conduit I4@ to exhaust and with groove |60 connecting conduit |53 to exhaust. Hence, with the valve element |56 positioned as shown in Fig. '7, the pad |8 with which conduit |44 connects will be deflated and the cylinder chamber |35 with which conduit ll connects will be open to atmosphere. Conduit |45 leading to the other pad I8 is exposed to pressure from conduit |40 and' this pad |8 will be inflated. Also conduit |48 leading to the other cylinder chamber |34 is open to pressure from conduit |4 so that uid is open into this latter chamber and, in Fig. 7 is about to force piston 16 to toggle straightening position.

Rotation of member |56 clockwise in Fig. 7 first opens conduit |50 to pressure fluid and then opens conduit |44 to fluid pressure, so that the toggle for the jack whose cylinder is thus opened to pressure will be straightened before the pad |8 connected tcconduit |44 is inflated. At the same time both conduit |46 and conduit |49 are connected to exhaust.

The control valve represented by dotted lines in Fig. l is generally similar to the valve of Fig. 7 excepting that the rotatable element |56' may be a disk with two similar arcuate grooves |58', itil', for controlling only the four conduits represented in the Fig. l valve.

I claim as my invention:

1. In a shoe press having a generally horizontally disposed inflatable pad, work supporting mechanism for coaction with the pad, comprising a support fixed relative to the pad, a member mounted on the support and extending in general parallelism with the pad at a fixed location above the pad, a post disposed with its axis generally transverse of the direction of extent'oi said member and having a work holder at one end and means for manually rotating thepost at its other end, means on said member slidably engaging said post intermediate of its ends, means threadedly engaging said post between said slidably engaging means and one end of the post, means including a toggle for quick-traverse movement of said threadedly engaging means relative to said slidably engaging means thereby to move said post and work holder to and from coacting relation to the inflatable pad, said toggle maintaining said threadedly engaging means against rotation whereby the work holder may be manually adjusted relative to the pad by manual rotation of the post through the medium of said manually rotating means at an end of the post.

2. In a shoe press having a generally horizontally disposed inflatable pad, Work supporting mechanism for coaction with the pad7 comprising a support fixed relative to the pad, a member mounted on the support and rotatable on a generally horizontal axis at a fixed distance above the pad, means limiting the permissive rotation of said member in both directions,means constantly biasing said member toward one of its said limits of rotation, a post carried by said member and disposed with its axis generally transverse of the axis of said member, means for manual rotative adjustment of the post in axial directions relative to said member, work holding means at one end of the post, the said limits of rotation of said member providing for lateral swinging of said work` holder about the axis of said member between a loading position laterally outward from the pad and a position directly over the pad, and means including a toggle ior quick-traverse movement of the work holder relative to said member and pad in directions axially oi said post.

3. In a slice press having a generally horizontally disposed inflatable pad, worl; supporting mechanism for coaction with the pad, comprising a support xed relative to the pad, a cylindrical member mounted on the support and rotatable about a generally horizontal axis at a fixed distance above the pad, means biasing said member in one direction above its axis, means limiting the rotation of said member in both directions, a postl carried by said member at a location over said pad, said post being disposed with its axis transverse of the axis of said member whereby rotation of said member swings one end of the post between a position in which the axis of the post is perpendicular to the pad and a loading position laterally outward from the pad, said biasing means acting in direction tending to maintain said end of the post in said loading position, and means including a toggle for quick-traverse movement of the post in directions axially of the post.

4. In a shoe press having a generally horizontally disposed inflatable pad, Working supporting mechanism for coaction with the pad, comprising a work holding post, a member supporting the post in which the post is rotatively adjustable in directions axially of the post, means supporting said member and post for swinging thereof on a horizontal axis thereby to swing the work holding portion of the post between a pressing position over the pad and a loading position laterally outward from the pad, means biasing said supporting means in one direction about its horizontal axis thereby tending to maintain said work holding portion of the post in said loading position, and a toggle connection between said member and said supporting means for quick-traverse movement of said member relative to said supporting means thereby to move the post in directions axially of the post.

5. In a shoe press having a generally horizontally disposed inflatable pad, work supporting mechanism for coaction with the pad, comprising a post having work holding means at one end, means supporting the'post -for movementI in axial directions between retracted. and extended positions and for lateral swinging of its work holding end from a pressing position above the pad, in which latter position the axis of the post is generally perpendicular te the pad, and a loading position laterally out/ward from the pad, means biasing the post axially to said retracted position; means )biasing said work holding end of the post to said loading position, said Work holding end being manually movable against its bias to said pressing position, and means for moving the post axially from said retracted position to said extended position when said work holding end thereof is in pressing position thereby to thrust said work holding end toward the pad.

6. In a shoe press having a generally horizontally disposed inflatable pad, work supporting mechanism for coaction with the pad, comprising a support `above the pad and fixed relative thereto, a member mounted on said support and rotatableon a horizontal axis, a post having work holding means at one end, means mounting said post on said member with its axis transverse of the axis of said member, means biasing said member in one direction about its horizontal axis whereby said biasing means tends to swing the work holding end of the post from a pressing position over said pad to a loading position laterally outward from the riad, means biasing said post mounting means in one direction of axial extent of the post, and means for quicktraverse movement of said post mounting means in opposition' to its said bias thereby to thrust the work holding end of the post in the opposite direction of axial extent of the post.

"7; In a shoe press having a generally horizontally disposed inatable pad, Work supporting mechanism for coaction with the pad, comprising a support at a xed location above the on said post below said guide, means for manual .the cylinder axis, a

rotative adjustment of the post in axial directions in said collar, means for moving the collar relative to the guide in axial direction generally toward the pad, means biasing the collar in axial direction generally away from the pad, and means biasing said cylinder in one direction about its axis thereby to swing the Work carrying end of the post to a loading position laterally beside the pad when saidcollar biasing means moves said end clear ofY the pad following a pressing operation. l

8. In a shoe press having a generally horizontally disposed inatable pad, work supporting mechanism for coaction with the pad, comprising a support at a xed location above the pad, a cylinder mounted on the support and rotatable on a horizontal axis, a guide xed at one end of the cylinder with its axis transverse of post extending slidably and rotatably through said guide and having work holding means at one end, a collar threaded on said post below said guide, resilient means en- ,y

gaging said support and said cylinder and biasing the cylinder in one direction about its axis, means including a toggle for moving said collar axially relative to said guide, resilient means within the cylinder and connected-to said toggle biasing said sleeve in its axial direction generally away from the pad, and means for rotativeV manual axial adjustment of the post in said collar. A

- PINCUS BRAUNER.

REFERENCES CITED The following references are of record in the le of this patent:

' UNITED STATES PATENTS Le Gault Sept. 20, 1938

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