US2379074A - Form-folding machine - Google Patents

Description

June 26, 1945. J. FOSSA I 2,379,074

FORM-FOLDING MACHINE Y Fil'ed March 10, 1944 17 Sheets-Sheet 1 fi 1 lnven t5) \Jbseph Fossq By his Attorney June 26, 1945. J. FossA 2,379,074

FORM-FOLDING MACHINE Filed March 10, 1944 17 Sheets-Sheet 2 4 Inven tor Joseph Fossa, By his Attorney June 26, 1945. J. FOSSA I FORM-FOLDING MACHINE l7 Sheets-Sheet 3 Filed March 10, 1944 lnven tor v Joseph Fossa By his jliitji/ June 26, 1945. J. FossA I 2,379,074.

FORM-FOLDING MACHINE Filed March 10, 1944 17 Sheets-Sheet 4 [nven for Joseph Fossa, By his Attorney June 26, 1945. J. FossA FORM-FOLDING MACHINE Filed March 10, 1944 17 Sheets-Sheet 5 2 C M-n m a r V 454 '7 f- T' l 44 446 XXEII [nven to? vJase uh Fossq By his Attorney June 26,1945. J, FOSSA, 2,379,074

FORM-FOLDING MACHINE Filed March 10, 1944 17 Sheets-Shet e Inventor Joseph Foss a By his .At tbrn ey June 26, 1945. I oss 2,379,074

FORM-FOLDING MACHINE Filed March 10, 1944 l7 Sheets-Sheet '7 Inventor Jose v71 Fossa. By his Attorney June 26, 1945. J. FOSSA 2,379,074

FORM-FOLDING MA GHINE Filed Ma rchlo, 1944 17 Sheets-Sheet 8 Inventor Joseph Fossa' By his Attorney June 26, 1945. J ss 2,379,074

FORM-FOLDING MACHINE m. 4 /4\{\ L O 6/0 v o 3/6 I o O 52a a \3- q d N am a lnven for Joseph Fossa. By his Attorney June 25,1945. v J. FOSSA 2,379,074

FORM-FOLDING MACHINE Filed March 10, 1944 1'7 Sheets-Sheet 12 lnven' for Joseph Fossa By his Attorney June 26, 1945.

. J. FOSSA FORM-FOLDING MACHINE Filed March 10, 1944 17' Sheets-Sheet 14 [nven tor Joseph Fosaa By 7128 Attorney w ll K i W w by A ,3

June 26, 1945. J, FQSSA "2,379,074

FORM-FOLDING MACHINE Filed March 10, 1944 1'7 Sheets-Sheet 15 Invcn tor Jbseph Fossa By his Aiiorny June 26, 1945. J, FOS 2,379,074

FORM- FOLDING MACHINE Filed March 10, 1944 l7 Sheets-Sheet l6 [nven tar Joseph Fossa, By 7118 Attorney June 26, 1945. J. FossA FORM-FOLDING MACHINE 1v Sheets-Sheet 17 Filed March 10, 1944 mmbg n fl [nven tor Joseph Foss'a, B? his Attorney Patented June 26, 1945 FORM FOLDING MACHINE Joseph Fossa, Lynn, Mass, assignor to United Shoe Machinery Corporation, Flemington, N. J., a corporation of New Jersey Application March 10, 1944, Serial No. 525.914

63 Claims. (Cl. 12'-.5'5.1)

This: invention relates to machines for folding margins of work pieces and more particularly to a form-folding machine in which thefolding is effected by a pair of cooperating dies which opcrate simultaneously along a substantial marginal portion'of the work. The invention is illustrated herein as embodied in a machine for folding the marginal portions of quarters of shoe uppers although it should be understood that the invention is not limited to a machine for operating on work pieces of any particular shape. I

One object of the present invention is'to provide a form-folding machine in which the work is supportedin fixed position on a stationary lower die and the folding is accomplished by a cooperating upper die which is so designed that the work is folded by the upper die moving in a single path normal to the work-supporting surface of the lower die. To this end and as a feature of the invention, the work piece is held on the'lower die with its margin projecting beyond the edge of the die; the upperd-ie having a. portion which projects over the edge of the lower die and supports the projecting marginal portion of the work piece. Consequently, when the upper die is moved upwardly the margin of the work piece is turned upwardly at right angles to the body of the work and held there and upon subsequent downward movement of the upper die the upturnedv portion of the work piece is folded backiupon the body thereof by the under surface of the projecting portion of the upper die.

The upper and lower dies of the machine illustrated herein are each formed in sections which are adjustable relatively to one another to accommodate work pieces of different sizes. In accordance with another object of the invention, provision is made for preserving thecontinuity of the edges of the dies as the sections thereof are separated to. vary the efiective size of the dies. To this end and in accordance with an other feature of the invention, filler pieces are provided between each pair of die sections and are movable automatically from retracted or inoperative positions into positions between the die sectionsupon their separation. The filler pieces are urged by springs acting thereoninto op.er-'

ative positions upon separation of the die sections. Latches cooperate with the filler pieces to hold them in their operative positions against retraction during operation of the machine, and means are provided for releasing the latches and retracting the filler pieces when it is. desired to move-the die sections toward one another.

. The illustrated, machine isv designed for folding the margins of shoe. parts having both. canvexly curved and concavely curved marginal portions. In order that these portions may be readily folded and folded without the formation of pleats, provision is made for pinking the convexly curved portions and slitting the concavely curved portions of the work piece during the folding operation. To this end and as a further'feature of the invention, the machine is provided with slitting and pinking knives which are normally held in elevated positions but are spring urged down wardly to act on the curved marginal portions of the work piece supported on the upper die which thus acts as an anvil in cooperation with the knives. After the work piece is positioned and held on the work-support the knives are released for downward movement to act on the marginal portions of the work piece and are subsequently returned to their initial positions by upward movement of the upper die and are locked in their initial positions by latches provided for this purpose.

As another feature of the invention the are mounted for lateral adjustment simultaneously with the sections of the upper and lower dies so that when the dies are adjusted for work pieces of different sizes the slitting and pinkiT-zg will take place along the proper marginal portions of the work.

Another feature of the invention relates to the .per die during the greater part of the folding operation so that these portions of the workwill have the desired contours after they have been folded. f

In accordance with a still further feature of the invention; the mechanism by which the upper die ismoved through its cycle of operations includes means for maintaining the upper die in engagement with the work for a predetermined length of time at the completion'of the folding operation to press the folded margin-of the work piece. The upper die is moved by fluid-pressureoperated mechanism which includes an adjustable timing valve operative to cause the upper die to pause in its movements while in pressing engagement with the work for a length of time dependent upon the setting of the valve. Attire vend of this time the upper die moves upwardl to permit removal of the work from the machine and knives then returns to its lowermost position in readiness for the next cycle of operation.

These and other features of the invention including various novel details of construction and combinations of parts will now be more particularly described by reference to the accompanying drawings and pointed out in the claims.

In the drawings,

Fig. 1 is a front elevation of a machine embodying the invention;

Fig. 2 is a side elevation of the machine;

Fig. 3 is a plan view, partly in section, of the lower die and its supporting and adjusting means Fig. 4 is a partial plan view of the lower die illustrating the operation of the mechanism by which the die is adjusted for the length of a quarter to be folded; I h

Fig. 5 is a plan view of another portion of the die illustrating the operation of the mechanism by which the parts of the die are adjusted to accommoclate quarters of different widths;

Fig. 6 is an exploded view in perspective of a portion of the lower die;

Fig. 7 is a plan view, partly in section, of the upper-die-supporting members;

Fig. 8 is a section on the line VIII-VIII of Fig. 1, being a plan view of the cross head supporting the upper die;

Fig. 9 is a plan view, partly in section, of the upper and lower dies and associated work-engaging members;

Fig. 10 is a section onthe line X-X of Fig. 8;

V Fig. 11 is ahorizontal section through the upper-die-supporting members, the section being taken just above the upper die, there being awork piece supported on the lower die;

Fig. 12 is a vertical section on the line XII-XII of Fig. '7 showing one of th presser feet in its raised position;

Fig. 13 is a similar view showingthe presser foot in its work-engaging position;

Fig. 14 is an angular view of the presser foot support;

Fig. 15 is an exploded View of one of the presser feet and an associated cornertool; V

Fig. 16 is a rear view of a portion of the upper and lower die assembliesshowing the manner of supporting and guiding th upper die;

Fig. 17 is a section on the line XVII-XVII of Fig. 11;

Fig. 18 is a section on the line XVIII-XVIII of Fig.7, showing one of the presser feet, a corner tool, and a pinking tool in raised positions;

Fig. 19'is a similar view showing the positions of the parts after the presser foot has been moved into engagement with the work;

Fig. 20 is a similar view showing the positions of the parts after the pinking tool has been moved into engagement with the work and the upper die has started its upward movement;

Fig. 21 is a view of the parts shown in Figs. 18 to 20 on a larger scale, showing the positions of the parts after the corner tool has moved into engagement with the work;

Figs. 22 to 26 are progressive views showing the position of the upper die at various stages through the remaining portion of the cycle of operation of the machine;

Fig, 27 is a section on the line XXVII-XXVII of Fig. 7

Fig. 28 is an angular exploded view of a portion of the upper and lower dies and associated structure;

Fig. 29 is an elevation of one of the slitting tools;

Fig. 30 is an elevation of one of the pinking tools;

Fig. 31 is a vertical section through the upper and lower dies illustrating the filler pieces between adjacent portions of the upper and lower dies, the filler pieces being in their retracted positions;

Fig. 32 is a similar view illustrating the filler pieces in their operative positions;

Fig. 33 is an elevation of the mechanisms by which the filler pieces associated with the upper of a portion of the mechanism shown in Fig. 36;

Fig. 38 is a vertical section of the filler-piecesretracting mechanism;

Fig. 39 is an angular view of the mechanism by which the sections of the dies are adjustably supported for diiferent sizes of work pieces;

Fig. 40 is an angular view, partly in section, of the mechanism shown at the right in Fig. 39;

Fig. 41 is a vertical section through one of the actuating handles of the mechanism illustrated in Fig. 39

Fig. 42 is a horizontal section on the line XLII- XLII of Fig. 2 illustrating a portion of the mechanism for releasing the pinking and slitting knives;

Fig. a3 is a vertical section through the mechanism for releasing the pinking and slitting knives;

Fig; 44 is an angular view, partly in section, showing the mechanism for driving the main cam shaft and for operating the upper die;

Fig. 45 is an angular view, partly in section, of a portion of the mechanism shown in Fig. 44;

Fig. 46 is an angular view, partly in section, of the cam shaft and associated mechanism i1lustrating a portion of the mechanism for operating the presser feet and the corner tools;

Fig. 47 is an angular view of a portion of the mechanism of Fig. 46;

Fig. 48 is a side elevation of the main treadle and mechanism operated thereby;

Fig. 49 is a fragmentary side elevation of the parts of Fig. 48 shown in different positions;

Fig. 50 is a fragmentary side elevation of some of the parts of Fig. 48 shown in still other positions;

Fig; 51 is an angular view of the mechanism of Fig. 48;

Fig. 52 is an angular view, partly in section, of a portion of the fluid-pressure mechanism;

Fig. 53 is a vertical section through the valve by which the length of time that the upper die remains in pressing engagement with the fold is regulated; and Fig. 54 is a plan View, partly in section, of the fluid-pressure mechanism.

The machine is illustrated as being carried by a frame comprising legs l0 and I2 (Fig. 1) between the upper ends of which is secured a bed I4. The leg It] may be attached directly to the floor and the leg I2 is carried by the bottom of 'a fluid reservoir l6 which is in turn supported on the floor. Secured to the upper surface of the bed I4 is a plate l8 carrying a lower die which supports a work piece the margin of which is to be folded.

In the illustrated embodiment of the invention the lower die 20 is shaped to support the quarter of a shoe upper as shown in Fig. 3. This die is made of a plurality of sections which may be separated to the extent desired to accommodate quarters of difierent sizes. The die comprises a center section 22 which supports the heel end of the quarter, a pair of intermediate sections 24, and a pair of wing sections 26. As shown more clearly in Fig. 6 the center section 22 of the die includes a base plate 28 which is secured to the supporting plate I8, a block 30 fastened to the base plate 28 by screws 32 and a top plate 34 fastened to the upper surface of the block 30. The top plate 34 supports the work for the folding operation and is preferably formed of suitable yieldable material such as rubber to accommodate varying thicknesses of work. The intermediate sections 24 which are similar to each other and only one of which is illustrated in Fig. 6 each comprise a base plate 36, a block 38 and a top plate 40 of rubber or similar material. Similarly, the wing sections 26 each comprise a base plate 42, a block 44 and a top plate 45. The center section of the lower die is secured by the bottom plate 28 to the supporting plate is against movement in the machine. However, the intermediate sections 24 and the wing sections 26 are adjustable relatively to the center section 22 as shown more clearly in Figs. 4. and 5 so that the lower die may accommodate quarters of diiferent lengths and widths.

For thus supporting the wing sections 26, the base plates 42 thereof are carried by arms 43 extending forwardly of the machine through slots cut in the under surfaces of the base plates 36 of the intermediate sections of the die and terminating forwardly thereof. Carried by the forward ends of the arms 46 are cam rolls 48 received by slots 50 formed in slides 52 supported in slideways in the supporting plate 18. The slots 50 in the slides 52 are so inclined that upon movement of the slides rearwardly of the machine from the position shown in Fig. 3 the arms 46 are moved in the direction of the arrows in Figs. 4 and 5, thus moving the wing sections 28 rearwardly away from the adjacent surfaces of the intermediate sections 24. This adjustment is made possible to accommodate quarters of different widths. For thus moving the slides 52 to adjust the die for different widths of quarters a slide 54 extending transversely of the slides 52 and supported thereon is provided. The slide 54 is formed with a pair of slots 56 which receive cam rolls 58 carried by the slides 52, the slots being so inclined that upon movement of the slide 54 to the right as viewed in Figs. 3 and 5 the slides 52 are moved rearwardly.

The slide 54 is guided for movement in slots formed in the under surfaces of racks 59 which are secured to slides 60 adjacent to the slides 52, the purpose of which slides will appear as the description proceeds. The right end of the slide 54 is formed with rack teeth 62 with which mesh the teeth of a gear segment 64 (Figs. 39 and 40) carried by a shaft 55 journaled in bearings 68 and ill formed in upwardly extending arms of a bracket 12 secured to the supporting plate 18. The shaft 66 carries an arm 14 to the outer end of which is secured a handle 16 by which the arm 14 may be moved to rock the shaft 66 and move the slide 54 through the gear segment 54' and the rack teeth 62. The arm 74 may be held in one of several different positions which correspond to different widths of shoes bya pin 18 'slidable within the handle 16 and having a tapered end portion engageable with one of a plurality of apertures formed in a plate 82 secured to an extension 84 of the bracket 12. As shown in Fig. 41 the forward end of the pin 78 is formed with rack teeth 86 engageable with the teeth of a gear segment 88 journaled on a pin 90 in the outer end of the handle. The gear segment 88-is provided with other teeth 92 engageable with teeth 94in the forward portion of a lever 96 pivoted at 9B in the inner end of the handle. A spring Hit acting between the handle 16 and the lever 9% urges the forward nd of the lever downwardly to move the pin 18 toward the plate 82 so that when the pin is registered with one of the aperture 8!) it locks the arm 14 in the desired position and the wing .sections of the die are locked against movement.

It will be noted in Fig. 41 that the rearward end of the lever 96 has a portion engageable with the adjacent surface of the plate 82 so that when the forward end of the lever is raisedagainst the forc exerted by the spring Hill the handle 16 will be moved away from the plate 82 to assist in it is desired to efiect a width adjustment of the lower die.

The intermediate section 24 of the lower die are arranged for lateral movement relatively to the center section 22. They are each guided during this movement by a bar Hi2 (Figs. 3 and 6) carried at one end by the base plate 28 of the center section of the die and at their outer ends by the plate l8, there being a spacing washer H33 between the outer end of each arm and the plate corresponding in thickness to the thickness of the bottom plates 36 of the intermediate sections. The blocks 38 of the intermediate sections are slotted to receive the bars I 22 which thereby guide the intermediate sections in their movements. The base plates 36 of the intermediate sections carry rolls IM which are received by slots I06 formed in the slides 58 carried by the plate l8 adjacent to the slides 52. The slots I06 are so inclined that upon movement of th slides l'ill rearwardly of the machine, as indicated in Fig. 4, the intermediate sections are moved away from the center section 38 along the bars 1H2. As

pointed out above, the arms 46 to which the wing sections are secured pass through slots formed in the under surface of th base plates 36 of the intermediate sections and, accordingly, these arm will be moved with the intermediate sections so that the wing sections will be adjusted with the intermediate sections upon rearward movement of the slides 66. Inasmuch as the racks 59 through which the transvers slide 54 passes are secured to the,slide 68 the slide 54 will also be moved rearwardly of the machine as indicated by the arrow in Fig. 4. the slides 52 to be moved rearwardly, thus effecting an additional movement of the win sections so that they will be separated still further from the intermediate sections. Thus, upon adjustment of the lower die for quarters of diiierent lengths by movement of the slides 58, both the wing sections and the intermediate sections of the die are moved relatively to the center section This will cause

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