Патент USA US2133397код для вставки
Oét. 18, 1_938. 2,133,397 A. PlcKFoRD MACHINE FOR EFFECTING RELATIVE MOVEMENT BETWEEN SHOES AND THEIR LASTS 'Filed Nov. 29, 1937 37 ILD# \ f/ 37 27 à ìfv 33 / \ ' _l \ 43 l 5 I 45 f I / 49 ’ I r fmII LI m |I F w \_ \a9 EI_ 1 9 __.. _gli 1 'n I \I_V/A.\_|I_ \ _ 0M o _ H.. .. II A.QI _L_ '7I w/ I ,V w \\ \ w _ _9 „W 1, ,_ I I I I I ‘ I I | I 2._,III 15\\\Il 9 Iïî __„jf _ _j 3W5 o. I/l_ I I »I 7/ / I \_ /I II | | / |f\ 1%\_I_QFI\ _ _\ -/A/VEA/TU/ä? v « ‘rf/C m %L»¿% i 2,133,397 Patented Oct. 18, 1938 UNITED STATES PATENT OFFICE 2,133,397 MACHINE FOR EFFECTING RELATIVE MOVEMENT BETWEEN SHOES AND' THEIR LASTS Albert Pickford, Leicester, England, assignor to United Shoe Machinery Corp., Paterson, N. J., a corporation of New Jersey Application November 29„1987, Serial No. 176,992 In Great Britain December 21, 1936 7 Claims. This invention relates to machines for effect ing relative movement between shoes and their lasts and is herein illustrated as embodied in a machine for separating shoes from lasts. 10 I and is connected by parts similar to those described in the above-mentioned patents to Whelton et al. No. 1,820,952 and Miner No. 1,882,083 to a treadle 23, the arrangement being such that when the treadle 23 is depressed the It is an object of the presentl invention to pro vide an improved machine for effecting relative movement between shoes and lasts with a mini mum of efîort on the part of the operator and parts of the machine so far described are similar without danger of damaging the shoes. In accordance with the invention the illustrated to the corresponding parts described in the above mentioned patents except that the roll 5, as will 10 last-pulling machine is provided with a block of yíeldable material having a recess to receive the heel end of the shoe. This block is normally struction. stationary and is arranged to- be pressed between 15 the shoe and a constantly rotating roll. The block, which in the illustrated machine is com posed of rubber, has fríctional characteristics which cause it when thus pressed between the shoe and the roll to partake of the movement of 20. the roll and in turn to impart movement to the shoe, raising the heel portion of the shoe 01T the last. ' The invention will now be explained with ref erence to the accompanying drawing, in which 25 (Cl. 12-15.1) Fig. 1 is a view in side elevation of the im proved machine; Fig. 2 is a view in front elevation of the im proved machine; and Fig. 3 is a sectional view taken on the line 30 III-III of Fig. 1 showing the shoe-engaging member. The supporting structure of the machine con sists of a hollow frame I in the upper portion of which is journaled a shaft 3 driven in a clockwise 35 . direction as viewed in Fig. 1 and carrying a roll 5. The shaft 3 may be driven by any convenient mechanism such, for example, as is disclosed in United States Letters Patent No. 1,820,952, granted September 1, 1931 upon the application of John M. Whelton and Arthur S. Pym, and No. 1,882,083, granted October 11, 1932, upon the application of George A. Miner. A last jack in the form of a swinging arm or lever 1 is fulcrumed> upon trunnion pins 9 for 45 movement toward and away from the roll 5. The trunnion pins 9 are carried upon a sleeve II which is adjustably secured upon another sleeve I3 journaled upon a pin I5 secured in the frontwall of the frame I. At its upper end the lever 1 50 carries a last pin I1 which can be adjusted for up and down movement by means of a rack and pinion controlled by a knurled head I9. The lever 1 has a rearwardly extending arm (part of which is indicated by the reference numeral 2I in 55 l Figs. 1 and 2) which passes into the hollow frame lever 1 is swung (clockwise as viewed in Fig. 1) about the trunnion pins 9 toward the roll 5. The later be pointed out, may be of a different con Secured by screws 25 to the lever 1 at each side thereof is an upwardly extending frame member 21 which comprises a stout metal strip bent into 15 the form shown in Fig. 2. The frame member serves as a support for an intermediate shoe engaging member 29 which comprises a block of rubber or like resilient material. The block 29 has metal plates 3| and 33 respectively at its 20 upper and lower surfaces and these plates are held together by rods 35 (see Fig. 3) which pass through the block and are fastened at each end to the plates. The upper plate 3| has also two rods 31 extending downwardly therefrom and 25 passing through slots 39 (Fig. 3) formed in the horizontal cross portion of the frame member 21. Threaded upon the rods 31 above the slots 39 are nuts 4I. The block 29 is normally held in low ered position with the nuts 4I in contact with the 30 frame member 21 by means of a tension spring 43 which at its upper end is connected to a hook on the plate 33 and at its lower end is connected to a hook 45 on the lever 1. The intermediate shoe engaging member 29 is normally located at the 35 level seen in Fig. 1v so that when a shoe unit S upon a last is placed upon the last pin I1 the heelward end portion of the shoe unit is received within a V-shaped recess 41 (see Fig. 3) which is formed at the front surface of the block. The 40 level of the block may be adjusted by turning the nuts 4I on the rods 31. In operating the machine a last having a shoe S` thereon is mounted in inverted position on the 45 last pin I1. The treadle 23 is then depressed to swing the arm 1 toward the roll 5. The heel end of the shoe enters the recess 41 and presses the rear surface of the shoe-engaging member 29 against the rotating roll 5. 'I'he guide slots 39 50 afford a limited freedom of movement of the shoe-engaging member 29 toward and from the last pin I1 suñìcient to enable pressure to be developed between the shoe and the walls of the recess 41 when further rearward movement of the 55 2 2,133,397 shoe-engaging member is arrested by the roll 5. shoes to avoid the transfer of color to light-col Pressure exerted through the treadle thus causes the shoe-engaging member 29 to be pressed be tween the shoe S and the roll 5, the pressure between the shoe-engaging member and the roll serving to develop suihcìent friction to enable the roll to drive the block upwardly and the pres sure between the shoe and the walls of the recess ored shoes. di' serving to develop sufficient friction to enable 10 the shoe-engaging member to raise the heel end Having thus described my invention, what I claim as new and desire to secure by Letters Pat ent of the United States is: 1. A machine for effecting relative movement between a shoe and a last comprising a support for a last, a driven member, said support and said driven member being constructed and ar of the shoe off the last. The upward thrust of ranged for relative movement of approach with respect to each other, and a normally stationary the shoe-engaging member will cause the last pin I? to be tightly cramped in the thimble hole of the last to hold the last against upward move ment of the shoe. The operator may insure such said driven member and having a recess to re cramping of the last pin by pressing downwardly on the toe portion of the shoe. After the heel portion of the shoe has been raised clear of the last the forepart can easily be removed from the last by hand. Upon release of pressure between the shoe and the shoe-engaging member the latter is returned by the spring 43 to its normal lowered position. The frictional engagement developed between 25 the shoe and the recessed rubber block above de scribed is particularly effective because of the relatively great area of contact between the shoe and the block and. also because the walls of the recess, held from spreading by the resilience of 30 the block and by the guide rods 31, embrace the sides of the heel end of the shoe with gripping pressure. The operation thus requires only a relatively light pressure between the shoe and the block, calling for a minimum of- eiîort on the 35 part of the operator and avoiding any danger of damaging the shoes. block interposed between a shoe on the last and ceive the heel end of the shoe, said block being constructed and arranged when pressed between 15 the shoe and the driven member to partake of the movement of the driven member and by frictional movement of the shoe to move the shoe rela tively to the last. 2. A machine for effecting relative movement 20 between a shoe and a last comprising a support for a last, a block of yleldable material recessed to accommodate the heel end of a shoe on the last, means frictionally engageable with said block to move the block, and means for e?îecting frictional 25 driving pressure between said block and said mov ing means to cause the block to be moved and also between the block and the shoe to cause the shoe to partake of the movement of the block and thus to move relatively tothe last on said last sup 30 port. 3. A machine for separating shoes from lasts comprising a support for a last with a shoe there on, a roll, a block having a recess to receive the heel end of the shoe, means for effecting fric rI‘he machines disclosed in the above-mentioned patents are described as having rolls the outer portions of which are composed of rubber. The 40 roll 5 of the machine illustrated herein may be composed of wood or other inexpensive material and is not only cheaper than a rubber-covered roll but lasts indelinitely. The frictional force developed between the rear surface of the shoe 45 engaging block 29 and the wooden roll is amply sufiicient to overcome the resistance between the shoe and the last. Furthermore, the machines described 'in the above-mentioned patents to Miner and Whelton said block and said roll and between said block and the heel end of the shoe, and means for driv ing said roll in a direction to cause the block to move the heel portion of the shoe oiï the last. 40 4. A machine for separating shoes from lasts comprising a support for a last with a shoe there on, a roll, a block of yieldable material interposed between the shoe and the roll and having a recess to receive the heel end of the shoe, means oper 45 ating on said last support to press the shoe against said block and thereby to cause the block to press against said roll, and means for driving said roll to move the block frictionally in a direc 50 et al. are provided with a mechanism, identified tion to cause the block to move the rear por in the said patent to Miner by the reference nu meral S6, for imparting to the last jack a slight movement lengthwise of the roll for each actua tion of the treadle. rI‘he purpose of this 4arrange 55 ment is to cause successive engagements to take place at diiîerent localities of the roll Vto prevent tion oí the shoe frictionally off the last._ 5. A machine for separating shoes from lasts undue wear at any one portion. In the machine herein illustrated however, wear, either of the shoe-engaging block or ofV the wooden roll, is 60 altogether negligible. Consequently the above mentioned mechanism for imparting movements to the last jack lengthwise of the roll may ad vantageously be omitted in the illustrated ma chine and the jack lever 'i arranged to swing 65 toward and from the roll 5 in a single plane. In order to insure movement of the jack in a single plane there is provided a stationary pin t9 extending forwardly from the frame I and en 70 35 tional driving pressure simultaneously between gaging aV slot 5l in the lever'l. The resilient block 29, together with the rods 31 as a unit, may readily be removed by unscrew ing the nuts Si and unhooking the spring 43, and a similar unit may be substituted. It is sometimes desirable thus to replace a block which 75 has been used in operations upon dark-colored 50 comprising a support for a last with a shoe there on, a driven roll, a rubber block interposed be tween the shoe and said roll and having a recess 55 to receive the heel end of the shoe, and treadle operated mechanism for moving the last support to cause the shoe to press against the rubber block and to press the rubber block against the roll, whereupon the roll will frictionally drive the rub 60 ber block and the rubber block will frictionally move the heel end of the shoe oiî the last. 6. A machine for separating shoes from lasts comprising a last pin, a driven roll, an arm car rying said last pin and pivotally mounted for 65 movement of the last pin toward and from the roll, a rubber block interposed between said roll and said last pin, a support for said block mount ed on said arm, and means for swinging said 70 arm to cause the heel end of a shoe on a last on said last pin to press against said block and to press the block against said roll, said block support being constructed and arranged to enable said block to be moved by said roll, whereupon 75 2,133,397 the block will move the heel end of the shoe oiî the last. ' '7. A machine for separating shoes from lasts comprising a last pin for supporting in inverted position a last >with a shoe thereon, a driven roll, an upstanding arm upon the upper end of which is mounted said last pin and the lower end'of which is pivotally mounted for swinging move ment of the last pin toward and from said roll, 10 a rubber block interposed between said roll and said last pin, a guide on said arm, said block be ing slidably mounted on said guide for heightwise movement with limited freedom for movement 3 toward and from the last pin, resilient means for holding said block normally down, a stop for determining the normal heightwise position of said block under the inñuence of said resilient means, and means for swinging said arm toward said roll to cause the block to engage the roll and to cause the heel end of a shoe on a last on said last pin to press against the block, whereupon the roll will raise the block and the block will carry the heel end of the shoe upwardly off the 10 last. > ALBERT PICKFORD.