US2478455A - Shoe support with clamping means - Google Patents

Description

g- 9, 1949- J. BOUCHAL 2,478,455

I SHOE SUPPORT WITH CLAMPING-MEANS Filed Jan. 6, 1947 IN V EN TOR. v

vw/afaw v nrrok/v'y Patented Aug. 9, 1949 s'HoE SUPPORT WITH CLAMPING MEANS Jaroslav Bouehal, Zlin, Czechoslovakia, assignor to Bata, Narodni Podnik, Zlin, Czechoslovakia Application January 6, 1947, Serial No. 720,382 In Germany March 23, 1943 Section 1', Public Law 690, August 8, 1946 Patent expires March 23, 1963 solaims. 1

Generally, with bootmakers machines for the treatment of the edges of the soles or of the perimeters at the lower portions of shoes or thelike, the shoe has been clamped in such manner that, depending on whether it is a right or a left shoe, it is brought to one or the other of two positions that correspond mirrorfashion in relation to an imaginary center plane of the shoe. Hence it follows that in an automatic machine for the treatment of, for example, the edge of the sole, always two sets of cam discs are required, namely one for right shoes and another for left ones, as these cam discs control the movements of the shoe carrier in relation to the tool which mostly operate permanently on the spot. Machines of this kind are, for example, polishing machines for the cut, automatic machines for sewingthrough' and' the like, in which the work-piece (i. e. the shoe) is clamped on a carrier which performs, in operation, such plane rotational and translational movements that the work-piece is positively presented for treatment to the working tools and/or is carried past the working tools according to the desired or given shape of the sole.

According to-the present invention two different sets of cam disc for right and left shoes are rendered unnecessary with machines of the kind referred to, by clamping the individual shoes in a novel manner. The clamping method of the invention is based on that the individual shoes or the like, i. e. the right and left ones, are alternatively brought into such a position in the carrier that the right shoe corresponds to a mirrorreflection of the respective left shoe, however in relation to that plane in which the shoes are moved by the shoe carrier itself, so that the position as well as the shape of the projection of the edge of the sole relatively to the tool are always identical for right and left shoes of equal size.

It is possible to fix shoes in accordance with this method in any desired clamping device provided the construction of the latter admits. Conveniently, however, the clamping device is equipped beforehand with suitable adjustment stops arranged on the shoe carrier and adapted to contact alternatively the upper edge and the tread surface of the sole, and to secure the correct position of each shoe (whether a right or a left one) in relation to the tool.

In the accompanying drawing an embodiment of a shoe carrier for performing the invention is shown by way of example.

The shoe carrier is shown equipped with adjustment stops I and 2 for securing the correct posi- 2 I tion of the shoe tipin a longitudinal as well as in a transverse direction. The stops I, 2 are adjustably attached to guide blocks 3, 4 by means of set screws 1, 8 engaging longitudinal slots 9, l0.

' The blocks 3, 4 are pivoted about pivots 5, 6 and are under the influence of springs ll, l2 which cause alternatively the abutting of the stops on.

the toe of the shoe or on the treading surface of the sole, as can be seen from the drawing. Both abutments l, 2 are equipped with stop-screws l3, l4 by which their deflection is limited in one direction.

Theclamping of a shoe in the carrier is effected by pads I 5, I6 and l1, 18 consisting of resilient material. The heel pads l1, l8 become alternatively operative as a right or a left shoe is clamped; in the drawing right and left shoe are shown in full lines and in dotted lines respectively. These pads are carried by pistons I9, 26, 2| which are prevented from rotating in their respective cylinders 28, 29, by screws 22, 23, 24 engaging grooves 25, 26 and 21 in the pistons, Fluid under pressure, air for example, is brought to act on the said pistons, which fluid is distributed to the cylinders 28, 29, 30 by means of pipes 3|, 32. The fluid is supplied, for example by means of a rub: ber hose, to the branch 33 of the pipe 3l.

For clamping a shoe the pressure fluid is brought to bear simultaneously on all of the pistons I9, 20, 2| firstly at low pressure whereby these pistons advance towards the shoe which had been inserted by hand. In the position of the shoe represented in the drawing in full lines the pad l5 bearing on the toe 34 of the shoe performs a shorter movement than the pad l6 bearing on the tread surface 35 of the sole. The pressure of piston l9 from the left to the right comes therefore into effect first but cannot cause any undesirable shifting of the shoe because this relatively low pressure is taken up by the right hand adjustable abutment 2 that bears on the tread surface of the sole. The pressure is conveniently chosen so low that even the operator himself can hold the shoe by hand in the required position until all of the pads l5, I6 and I! have assumed their correct position whereafter the full clamping pressure i switched on. When clamping a left shoe (as indicated in the drawing in dotted lines), conversely the adjustable abutment l comes to bear against the tread surface of the sole, and again secures the correct position of the shoe although in this case the elastic pad I 6 of the piston 20 acts on the toe of the shoe prior to the pad l5 of the piston It. The adjustable abutments I, 2 bearing alternatively against the edge of the sole at the toe of the shoe ensure in any case that the shoe is brought into correct position by means of the heel pad ll or l8, as determined by the setting of the screws 3 and From the-icreeqi r ns the clear that the shoes are alternatively clamped,

according to the invention, so that the projection:

of the soles on to the center plane ofrthe clamping device coincide Accordingly the s'hoe car rier can perform the same w orliiing movement for the treatment of a right shoe as forallett one-,- which movements are composed of rotations about the axis of the clamping head or chuck in the journal 38, and of translational movements of the slide carriage 36 WhiCIkiSjSlliftQblY-t3121 drawing; ;it will ibe ranged in the said head to which; the wh'ole,

clamping device is attached.

The clamping device allows a quick automatic-- clamping of the shoes without any danger to the operatorsehands;

I-scl'aim; 1; A; footwear carrier-ifor azbootmaker s ma chine including: a-support-for' apiece of foot-- wear having a; sole providediwith an upper rim andLa tread sunface and" adjustable-=-abutments for alternatively contactingithe upper rimof the soleaandsthectread 'sunf ace ot the soleof the -piece of footwear; whereby-might ando'left piecesof a pair ot the footwear-can lee-alternativelyclamped inposition corresponding to mirror reflections of one another.

V 2'; carrier as set forth in claim 1-, including displ'aceable heel: support pads; the+ said adiustable-abutments' being pivoted-inthe direction-of- Number 5. A carrier as set forth in claim 1, including displaceable heel support pads, two opposed displaceable toe clamping pads, and means for displacing said pads to clamping positions, the ad- ,instab a u ments bemgepswtedintheir ion id sp ement ft eel surpp t pads. whereby they can be swung outwardly when required.

6. A carrier as set forth in claim 1, including two displaceable heel support pads disposed in the sense ot mirror reflections of one another in relatienzto the.,soleplane of a piece of footwear clamped-1112thetcarrier, two opposed displaceable toe clamping pads, and fluid pressure means for displacing said pads-to clamping positions, the adjustabi'e abutments being pivoted in the direction of displacement-of, the heel support pads whereby they can-.Jbeswung outwardly when required.

7. A carrier as set forth in claim 1, including two opposite toe clamping pads, plungers supporting the pads, and fluid pressure cylinders in which the plungers'are movebleythe-adjustable abutments 'bein'g= mounted on the said cylinders:-

8. A footwear' carrier' fon an automatic bootmaker's machine: this "machine including ;a'- ma v chine tool "and the footwearcarrier--includi n g a* supportj'for a piece-of jfootwear'provided with a;- sole portion, and having a treat surface; the foot wear carrier further including adjnstaple abuts ments for contacting the surface of the-pieceof, footwear, whereby: rigl 1'i 1ami left "pieces of ap'air of the footwear can'pei alternatively;clampedirf ositions corresponding to; mirror reflections; of one anotherwuh re ardto thetreat surface of the footwear, sojthattheoutlinie of the sole portion in relation.tolthelmachihes oolis always the m fo o hpieces...0.f the naiiirof tlfefootw ar;

' JARUSLAYiEQUCHAL-J,

' REFERENGE'SWCITED" Thea following 1 referenlceseare: 0t :1 fir'iiQ tdlaa nn h file; of this patent:

UNITED STATES'iPATENTS n am-i

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