US1573810A

US1573810A - Apparatus for making shoe shanks

Info

Publication number: US1573810A
Application number: US687271A
Authority: US
Inventors: Christopher C Cunningham
Original assignee: MOONEY Ltd AG
Current assignee: AG MOONEY Ltd; MOONEY Ltd AG
Priority date: 1924-01-19
Filing date: 1924-01-19
Publication date: 1926-02-23
Anticipated expiration: 1943-02-23

Description

Feb. 23 1926.

C C- CUNNINGHAM APPAHATUS FOR MAKING SHOE SHANKS Filed Jan. 19, 1924 2 Sheets-Sheet l 5 i .52 @fi? 2 1 i- FIGC4 INVENTOR Cfiris etGCmnin am mfin Adm? ATTORNE S punched or pierced, cut oii' and bent to the holesin the material, while the other por- T "steel shoe shanks, which are fitted to a shoe Patented Feb, 23, 1926.

unirsn's'ra'rss rarsn'r orrics.

CHRISTOPHER C. CUNNINGHAM, OF MONTREAL, QUEBEC, CANADA, ASSIGNOE TO A. G. MOONEY LIMITED, F MONTREAL, QUEBEC. CANADA.

APPARATUS FOR MAKING SHOE SHANKS.

Application filed January 19, 1924. Serial No. 687,271.

To all whom it may concern.

:Be it known that I, CHRISTOPHER C. CUN- NINGHAM, a subject of the King of Great Britain, ot the city of Montreal, in the Province of Quebec and; Dominion of Canada, have invented certain new and useful Improvements in Apparatus for Making Shoe Shanks, and do hereby declare that the following is a full, c1ear,'and exact description of my invention, such as will enable others skilled in the art to which it appertains to make and use the same.

- This invention relates to new and useful improvements in the apparatus for forming heels, which may be, as is well known in the trade, Louis, Cuban, military or low heels. Sprin ribbon steel is used in the manufacture of the shanks, said steel, being of even temper and subjected to the same pressures during manufacturing process, ensures results in which the shanks are of uniform shape and size.

In the drawings:

Figure 1 is a side elevation of the die and punch.

- Fig. 2 is a plan view of the die, for torn'iing the shank.

Fig. 3 is an end view of the punch and die showing the bending portion of the die.

Fig. 4 is an end view of the punch and die showing the piercing and shearing portion.

Fig. 5 is a side elevation of one modifica tionot' the punch and die shown in Fig. 1.

Fig. 6 is a plan view of the die shown in Fig. 5.

Figs. 7 and 8 are end views of the 1nodilied form of the punch and die shown in Fig. 5.

Fig. 9 is a perspective view of the adjustable mechanism tor controlling the bending of the shanks.

Fig. 10 is a sectional elevation of the die taken on the line 1010 Fig. 5.

Referring more particularly to the drawings, and particularly to Figs. 1. 2, 3 and -l- 2O designates the base ot the die, a portion of which is used for cutting and piercing the ribbon spring steel 21 and the other portion is used for bending the steel into the form shown in dotted lines in Fig. 1 and designated 22. Mounted in the recess 23 o l the cutting portion of the die is the hard steel plate 24; which is held in position by the dowels 25 which pass through the said plate and the die. Also mounted in the recess 23 is the piercer guide bar 26 which is held in position by the dowel pins 25. The piercer guide bar is provided with a plurality ot' holes 27 which are each provided tion of the die is IDZIClQ adjustable to vary with a hard steel bushing 28. Also mounted the curvatures of the steel shanks which on the die are the guides 29 for the. ribbon may vary according to the height of the steel, and above the guide isinounted the for supporting the instep or arch of the foot, and the object of the invention is to provide asimple, inexpensive and elficient apparatus for forming said shoe shank which will greatly reduce the cost of manufacture and increase the production thereof.

Another object is to provide an apparatus for forming shoe shanks which will produce shanks of uniform curvature and even temper.

A further object is to provide an apparatus which will be adjustable to suit the varying lengths and curvatures of shoe shanks.

A still further object is to provide an apparatus in which the shanks will be desired curvature with each stroke of the apparatus.

In ,my invention 1 provide a die and punch made in two portions, one portion of each being used for shearing and piercing tion of each used for bending the material to the desired curvature. The die is provided with a plurality of holes through which piercers adjustably mounted in the punch are adapted to pass, so that the pitch of the holes to be punched in the shank may be varied to accommodate the various lengths of the shoe shanks. The other porstripper plate which is also provided with a plurality of apertures 31 to allow the piercers hereinafter described to pass throu 'h. The 'uides are sJaced trom one another and may be made adjustable to allow for the varying widths of the spring steel used and both the guides and the stripperplate are held in position by the countersunk screws 32. Supporting plungers' formed in the underside of the die. Springs 7 iltiarc fitted in the recess and, acting against the head hold the plung'ers inposition so that the ribbon steel passes over the points 3'? of the plunger-s. The guides extend approximately from one end to within a short distance of the centre of the die. Atthe other end of the die the'bending block 38 is niountet between the projections 39 and e0 the centre of the bending; block being provided with a curved recess ll into which the spring; steel is pressed by the curving punch hereinafter desc'ibed. To position the bending block screws 4e2-are provided pas through thepr jection 39 the bending block, and screwed in threaded apertures 43 formed in the projection 4:0 The.

screv also hold in position o stop i l which butts against the projection 89, and lS-SPtlCQCl. from the upper edge of the projection 39 n. bevelled to 'lorn a cutting edge for steel. The stop all is placed between the piercing section and the bending section of the die. To provide adj ustmcnt, 45 are placed between the projections O and the bending block 38-. The

ee a base 46 having); auex- 47 which may be used for .id punch to the vertical -noving of a llliss or the like press, not ()n eed above the piercing portion ol the die is e. hard steel plate 48 and a piercec holding plate punch bynieansof the countersunk screws The plate is provided with a pluapertures 51 thrs-iugh hich the are placed, said piercers be.

: il lp' i .P' Md with a head m3 h ing in-a slot oi tl'irough holes in the punch to positiouthe punch and he die in the above relationship Positioned above the projection 40 or": the die and secured tothe punch by the-screws 53 s the knife blade :43 the edge 55 of which is the lower side of the punch and secured to the base ot the in the plateatf). The centre of the ape" bevelled to form a cutting edge. The side 56 of the blade is so positioned that when the punch and die are brought together said side will be approximately against the sides 57 of the projection. The bending portion of the punch is provided with a curved block slidably mounted in a groove 59 cut in the base. The block is adjustably held in the slot 60 formed in the base and through which the stud 61 attached to the block may he moved, said stud being locked in any desired position by means of the nut 62. The foregoing description refers to the simplest form of my invention, but this may be modifled as shown in Figs. 5 to 10 inclusive which shows a bending portion which is provided with a finer; means of adjustment. The remaining; portions being similar to those shown in Figs. 1 110:4; inclusive and each part is provided with the same designating numerals.

In the modification between the projecting portions 39 and 40 are mounted the curved

shaped blocks

63 and 64 which are'held between the guides 65 connecting the projections and in the slot 66 formed in the underside otthe die. Theblocks are mounted on a spindle (37 having right and left hand threaded portions 68and69 which engage with correspondingly threaded apertures 111' the blocks so thatson tu ning the ds one ycrew the blocks approach towar another or travel away trom one another according .to the rotation of the spindle.

The spindle is held in position by means of a sleeve 70 passing through the projection 39 and is locked in any desired position by means of the grooved key 71 engaging with the sleeve. Temporary adjustments are made by means of the sleeves and finer adjustments made by means of the spindle. The bending portion 58 of the punch is made adjustable in the vertical direction by splitting it into two

portions

72 and 73 and being provided with horizontal teeth 7%" and 1 74 which engage with one another. The

parts are held together by means of the screws 7 5,. one part of which rides in the slots 76 and the other part engages with the :threaded apertures 76. A plunger 77 may be slidably mounted in the bending block 72 am. .73 and a spring 77 placed between the base portion and the head of the plunger to holdit in position. This plunger is provided tor holding the spring steel in position until thespring steel is bent to the required curvature. The nae-ration of the device is as follows: Sprii-ig steel is passed through the piercing die between the guides, and the piercers are adjusted in the punch to the required pitch. In, the, first part of the open ntion the shank is sheared and punched only.

the spring plunger bringing the spring steel a must, the ehcdder plate or. stripping plate to allow the piercers to be drawn clear of the steel. After the first operation one shank .is sheared andpicrced while the other is bent to any required angle by means of the bending blocks which may be adjusted to suit any desired cuiyature. When altering the die, plates l may be taken from one side of the bending block to the other and may be held in position by means of the screws. Readjustment may be also made in the punch to alter the varying position of the centre of the bending block. In the device shown in Figs. 5 to inclusive the length of the bending block may be varied, said bending block being made in two portions, each portion being provided with engaging teeth and the binding screws are fitted in slots formed in one of the portions "after which the finer adjustments may be made by rotating the threaded spindle. As

will be seen, this punch and die mechanism can be adjusted to suit the varying lengths of shoe shanks and by slight modifications may be made to cover the manufacture of all classes of shanks interchangeable and non-interchangeable. The device may be fitted to any class of press (not shown). The shanks being made of spring steel of uniform temper and being subjected to the same pressure and operations, are of uniform curvature and length after the operation and when the shanks are fitted to the shoes the arches will be alike and hold the shoes in the desired shape.

Having thus described my invention, what I claim is 1. An apparatus of the character described comprising upper and lower the members bending, shearing and punching elements adjustably carried .by each die member and cooperating with the complementary elements of the other die member, means "for rigidly securing the elements of each set to the die men'iber when said elements are in the desired position of adjustment, the arrangement being such that the bending she-aringand punching operations are accomplished simultaneously by movement of one of said die members in the direction of the other die member.

2. An apparatus as recited in claim 1 wherein the punching means of the upper die member is adjustable, vertically and horizontally while the con'iplementary punching means of the lower die member is adj ustable in the horizontal direction to rcgu late the curving o't theshank.

3. rin apparatus for forming spring steel shoe shanks comprising a punch having picrcers mounted in the punch, means for positioning the piercers in one end of the punch, shearing knife secured to the punch, a bending block mounted' in the punch and attached thereto means for adj usting the bending block in combination with a die having means for guiding the shank, means for guiding the piercers, spring controlled means for supporting the shank before shearing and punching, a stripper plate for disengaging the shank from the picrcers, means for suppo:.ting the shank during the process of shearing, and a curved supporting block adjustably mounted in the die.

4:. An apparatus for forming shoe shanks from spring steel con'iprising, a punch haw ing piercers mounted therein, means for holding the piercers in any desired position, a bending block mounted in the punch, means for adjusting the block in the horizontal direction, and a knife mounted between the piercers and the bending block and secured to the punch in combination with a die having, at one end guides for the piercers, guides for the spring steel, spring controlled plunger supports for the spring steel before shearing same, and at the other end blocks for holding the steel during the process of bending, and midway between the holding blocks and the guides for the shank means secured to the die for supporting the steel during the process of shearing.

5. A shoe shank forming apparatus according to claim 4 having means for adjusting the bending block in the punch, in the vertical direction.

6. In an apparatus for forming shoe shanks, a punch comprising a base portion having piercers mounted therein, means for holding the piercers to the punch and positioning the piercers in any desired position, a two-piece bending block mounted in the punch, means for adjusting the bending block in the horizontal direction, a serrated joint between the portions or pieces of the bending block, and means for ad usting part of the bending block in the vertical direction and a shearing knife secured to the punch and positioned between the piercers and, the bending blocks in combination with a die having a. base, guides for shoe shank steel and the picrcers secured to the base. said guide? being positioned at one end ot' the base, two projecting portions at the other end and made integral with the base, a twopiece shanlcsupporting block mounted between the projections and slidably mounted in the base, a sleeve, a spindle mounted in the sleeve and secured to the blocks so that on rotation of said spindle the blocks will move towards or away from. one another, means for positioning said sleeve in one of the projecting portions, and spring-oon'- trolled positioning means for the spring steel.

7. A device according to claim 6, having springpontrolled positioning and releasing means forthe spri-i-lg steel before bending,- said means being positioned in the tWopiece bending block. 7 10 In Witness whereof, I have hereunto set my hand.

GHRISTO'PHER C. CUNNINGHAM