US2428047A

US2428047A - Work support

Info

Publication number: US2428047A
Application number: US576339A
Authority: US
Inventors: John F Standish
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1945-02-05
Filing date: 1945-02-05
Publication date: 1947-09-30
Anticipated expiration: 1964-09-30
Also published as: ES173379A1; DE809153C

Description

Se t 30, 1947.

J. F. sTANblsi-l v WORK-SUPPORT Filed Feb. 5, 1945 3 Sheets-Sheet 1 Sept. 30, 1947. J. F. STANDISH 2,428,047

' WORK-SUPPORT Filed Feb. 5, 19515 3 Sheets-Sheet 2 Sept. 30, 1947. J. F. STANDISH WORK-SUPPORT Filed Feb. 5, 1945 a sheets-sheet s r w m V n Patented Sept. 30, 1947 UNITE o STATES oFFicE V 2,42%47 i I WORK SUPPORT V John F. Standish, Winthrop, Massi, assignorto' United Shoe Machinery Corporation, Fleihin'g-- ton, N; J., a corporatioi'rof New Jersey Application February 5, 194 S er-ial No. 57619 This invention relates to supports upon which Work may be mounted for'operations upon it, it

especially concerning those supports employed in the attachment of heels to shoes.

In a known heel-attaching machine in which a; single nail is driven through the heal-seat of a lasted shoeinto a heel positioned upon the heelseat, the Work is supported'upon a jack having a; tub'ular'spin'dle received in a'passage through the'rear'of the last-cone, the riail driver operating'threugh' the spindle. To hold the work in a definite'r'elation to the driver, the end of the spindlema'y be engaged" e'ither'by'the insole of sure from thespindle or like supporting'memb'er, While still maintaining its engagement with'th-e work; at the same time correctly locating ana stably supporting said work, To this end, 1' pro vi'detwo" movable" supporting members; at least one of which'is movable'under the influence of the work. With these members is combined means for retaining one" of} themagainst move merit during movement of the other, and then freeing the retained member and retaining the other against movement The first of these members m'a'ybe the last-enteringspindle of a hee1- attaching machine, andthe second a; bed-piece arranged-'to'receive engagement of thefcrown-of' the last-cone. With't-he' two" members yieldable under engagement ofthe work, by'initially'1ock ii'lg one the work may lie-positioned properlyior' theopeiation; to be performed upon it, whilethe other member is being located by the work; Then,

releasing the fir'st member, it is relieved of thepressur'eto be" applied; yet is maintained in Contact withthe wo-rk, and "by locking the second iiiember,which has yielded during the first stage of operation, the 'WOIk is heldiirmly as positioned for the operation upon it. The locking and. releasing of the members is preferably controlled hy the position of the support, thereheing means afcting during the movement of said support to' erI'eet'the-change. One member, as the spindle, is locked in the work-receiving position of' the support and unlocked as it'travels to the operatmg position; trieireverse being true for the Second.

14 Claims. (01; 12 126)- member" or 'Iastmed-pi'ec'e": More s ecifically, my improve'df work support ofja'ck has a base slidablefbe'tweeii the tw'o positions, and deprefss'ible in which; hyengagemei'it of the work, are a; lastspin dleanda last 'bed piece'; As illustrated, this spindleis"heIdup'initially-by atrack extending-i along: the; path offthe jack and" freed beforeth'e operatingpositionisreached. The last=bed'-piece is carried by an hydraulic device, in a manner usable in other connections than in association with'a last s'pindie; This device includes a piston carrying the last 'h'ed pi c'e and' operating in a cylinderunderthe' control-0i a valve, which may be actuated "by. a" track similar to that" governing the s m a i In the ccompanyingdrawings,

Fig. 1 is a" central vertical longitudinal section through one embodimentaof my invention, showing 'the ja'ck" in itswork receiving position; I

1-'*ig 2 z'rsi-milaJr view with thejack in-o'perating position; i

Fig"; '3"; a} fvertioalf transverse section, taken at the? center of the last -be'dfpiece; Y

Fig; a perspectiveview of the controlling means for the valve governirig'the last-bed-pigece';

Fig; 5, a similar View orthe means for' limiting the traverofthejack; and

, Fig; 6} alilefviewofthecontrolling means for the'last-spindle;

The worms per-t; of this invention is herein disclosed-as app ed toaheel-attaching machine,

in which-aplung IWrciprocated under power ina-frame coilumn actuates-a driver M, guided in -a j'acli J 't'o insert;a-naiINthrough the heelseat of a jacked-shoe Sintba heel H. The shoe i'sifcflarrie by a aist-L providedwith a-la st -plate 1;,

ssag a neline'd forwardly from" he crown of-th'last-cone'to the heelseat-portionr The magma-e is shown as having a" shoulder l-" overhanging the end' of the passage.

The heehi clamped place upon the heel-seat-'- of the's'hoe'td rieeeive'the aetion'ofthe driverby a holddowndevice P; reciprocated under the power of the 'machi-rre. Attached to the topoi meg-solemn llisa we ls; elongatedfore and aft o'iithe" machine anepmvmewwen opposite ways l8; l8 inclined downwardly and rearwardly.

Guided in the'ways is theplate-like base 2'!) of a,

movement to the operating; position (Fig; 251slimited by the engagement of the edge-28 of thei a foot 38 clamped upon the spindle by a screw 40 (Fig. 6). The upward movement of the spindle is limited by engagement of the surface 42 of the foot with an opposed surface upon the jack-base. Adjustment of the foot upon the spindle, of which it may be considered to be a part, permits the upper extremity of said spindle to be located at such a height that it will support a lasted shoe in a definite relation to the driver I4. Therefore, in the reciprocation of the driver, the head of the heel-attaching nail N which it carries will be sunk properly in the insole. The driver is held against downward displacement in the spindlepassage in its normal position by a key 44, fitting an opening in the spindle-wall and lying at its inner edge in a key-way 46 extending longitudinally of the lower portion of the driver. The outer edge of the key lies in a slot 46 in the jackbody. In this slot, the key will move during depression of the spindle. When the jack is in its forward work-receiving position, the spindle 34 is locked against depression by contact of transversely extended portions 50, "50 of its foot 38 with tracks 52, 52. These tracks are bridged together at 53 and are inclined downwardly and rearwardly at the same angle asgthe ways I8. The bridge-piece is secured to thefront of the cap I6 for vertical adjustment by slot-and-screw connections 54. By this adjustment, the tracks may be brought into the proper relation to the foot of the spindle, for any adjustment of said foot which has been made to locate the upper end of the spindle. After acertain extent of movement of the jack-base toward the operating position, the tracks 52 end, and the spindle-foot runs off above a lowered portion 56, which frees the spindle for depression but still prevents undue downward displacement. The work now receives the support of another member, as described below.

In the jack-body 22 a vertical cylinder 58 is formed. In the cylinder operates a tubular piston 60, having in an enlargement BI at its top a segmental depression 62, which receives the complemental under surface 64 of a bed-piece 66 for which the piston is a carrier. The cylinder, with the piston, may be considered as portions of the base. The central portion of the segment 66 is shown as removed, the hollow thus produced being surrounded by an annulus which is Wedgeshaped in transverse section. As a result of this, th descent of the holddown P initially causes the positioning of the bed-piece at the proper angle. Then, as the clamping pressure goes on, the effect of the wedge is to lock said bed-piece against displacement. The plane upper surface 68 of the bed-piece is adapted to support the last L by contact with the crown-surface III of its cone. The spindle 34 passes through a radial slot 72 in the bed-piece. The piston and bed-piece are urged normally up by two expansion-springs I4, I4, surroundin rods I6, I6 depending from the piston-enlargement 6i through openings in the jack-base 20. These springs are interposed between the piston-enlargement and the ba 4 and upward movement of the piston, produced by the springs, is limited by the contact of nuts 18 threaded upon the lower ends of the rods with the underside of the base. The lower end of the piston carries a valve-seat 80, in an axial upward extension 82 of which the stem 84 of a valve 86 is movable. An expansion-spring 88 between the extension and a flange 90, below a splashdisk 92 secured to an enlargement 93 upon the upper end of the stem, tends to close the valve, and thus th passage through the piston. When this occurs, the piston is locked against depression by a body of non-compressible liquid, such as oil, contained in the cylinder. In the workreceiving position of the jack (Fig. 1), the valve is held open by a bell-crank-lever 94 (Figs. 3 and 4), fulcrumed at 96 on the piston-enlargement 6|.

One arm 98 of the lever extends between the flange 90 and the enlargement 93, it being forked to receive the valve-stem. The opposite arm I00 of the lever has a depending portion, movable in the travel of the jack along a track I02 parallel to the ways I8 and extending from a bracket I04 attached to the cap I6. With the jack in Workreceiving position, the track engages the arm I00 and actuates the lever to lower the valve from its seat. The position of the nuts I8 upon the rods 16 permits the springs I4 to so elevate the piston 60 and last-bed-piece 06, that, when the plate I of the last having the lowest cone contacts with the end of the locked spindle 34, th engagement of the crown of the cone with the last-bedpiece at least slightly lowers the unlocked piston. When the jack is shifted rearwardly by the operator into operating position, the lever-arm I00 leaves the track I02, it lying opposite a reduced portion I05 with which said arm does not contact. The valve is now closed by its spring 88,

preparation for the heel-attaching operation.

Considering the action of the jack J through a heel-attaching cycle, initially the base 20 is forward in its ways l8 in the position of Fig. 1, fixed by the engagement of the projection 24 with the plate 26. The foot 38 of the tubular spindle 34 rests upon the tracks 52, and the spindle is therefore locked against depression. drops a nail-head-down into the passage of the spindle, places over the spindle the passage :2: of

a last L bearing a shoe S, and positions a heel H upon the heel-seat of the shoe. Since the arm I00 of the lever 94 is in engagement with the track I02, the valve 86 is open, the piston 60 and last-.

bed-piece 66 being'raised' to the maximum extent by the springs I4, (as shown in Fig. 3). The descending crown of the last engaging the bedpiece carries this down with it against the force" of the springs.

operator now slides the jack back until it is,

stopped by the bar 30, the work thereby being located in operating position. Before the spindle- 'foot 39 leaves the track 52, the lever-arm I00 passes oi the track I02. The valve 86 is, therefore, closed by the spring 88, trapping the oil beneath the piston 60 and locking this against depression, Then, the passing of the spindlefoot from the track over the depressed portion 56 trees the spindle. Consequently, the last-bed- The operator.

1.0 to insert the nail which it carries through the heel-seat :of the shoe into the heel. At this time, the spindle is held up only by the spring 36 and is, therefore, subjected to no clamping pressure transmitted through the last-plate-shoulder I. even were there some downward yield of the work to occur. The spring does, however, maintain the end of the spindle yieldably in close contact with the last-plate, so there is between the spindle and the plate no space into which any portion of a nail may pass. In prior machines of this type, the nail tends to slide laterally upon the end of the driver, so the edge of the head enters between the end of the spindle and the shoulder of the last-plate. When the spindle is fixedly supported, the pressure which the nail-head exerts against the shoulder will gradually wear away said shoulder, so the spindle will pass through the last. This necessitates replacement of the last-plate. ating cycle of the machine, the driver descends to its normal position, the pressure device rises to free the work, and the operator draws out the jack and removes the shoe with its attached heel.

It will be seen that in this support there are provided a member which supports the work to locate it accurately in preparation for the operation upon it, and a second member which measures the positioned Work and then furnishes the final pressure-receiving support, the first member functioning only as directing means without work-pressure. Further, the transfer of action between the two members is effected by simple and effective means, controlled automatically during the travel of the support in its customary reciprocation between the work-receiving and operating positions.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A support into cooperation with which work is moved and comprising two movable work-supporting members at least one of which is moved by the work, means for retaining one of the members against movement during movement of the other, and means for freeing the retained member and for retaining the other member against movement,

2. A support engaged by work and movable between two positions, said support comprising two supporting members movable independently of each other by the engagement of the work, means for retaining one of the member against movement during movement of the other, and means acting during movement of the support for freeing the retained member and for retaining the other member against movement.

3. A support comprising a yieldable work-supporting member, means for locking the member in position to locate the supported work, a supporting member yieldable while the work is being thus located, and means for freeing the first member and locking the second member after the location of the work.

4. A jack comprising a base, a last-spindle and a last-bed-piece-carrier movable upon the base by the application of a last to the jack, means for locking the spindle against movement, and

During the completion of the oper- 6 means for locking the carrier against movement.

5. The combination With a' frame, .of a jackr sbase movablebetween work-receiving and operat- 'ing positions, a last-spindle and :EL last-bed-piececarrier movableuponethe base, locks for the spindle and carrier, and :means'for controlling the effect of .theilooks upon thespin'dleand carrier :in ithemovement of the base between work-receiv ing and operating. positions.

6. A jack'comprising a base movable between work-receivingfiand'l operating positions, a lastspindle movable upon the base, means for looking the spindle against movement in work-receiving position, a last-bed-piece-carrier movable upon the base in work-receiving position, means for locking the carrier upon the base in the movement of the base toward operating position, and means for releasing the spindle from its locking means upon movement of the base toward operating position.

7. The combination with a frame, of a jackbase slidable thereon between Work-receiving and operating positions, a last-spindle yieldable in the base, a track by which the spindle is held against depression in the work-receiving position ofthe base and is released when in the operating position, a last-bed-piece-carrier yieldable upon the base, and means including a trackby which the carrier is left free for depression in work-receiving position and is held against depression in the operating position.

8. The combination with a frame, of a jackbase movable thereon, a work-supporting member movable upon the base by engagement of the work, and means made effective during the travel of the base for locking the work-supporting member against movement.

9. The combination with a frame, of a jackbase movable thereon, a work-supporting member movable upon the base by engagement of the work, and hydraulic means made effective during the travel of the base for locking the work-supporting member against movement.

10. A jack comprising a base, a work-engaging member movable upon the base, an hydraulic device by which the work-engaging member is positioned, a valve by which the hydraulic device is controlled, and means for operating the valve.

11. A jack comprising a movable base, a cylinder carried by the base, a piston movable in the cylinder, a last-bed-piece carried by the piston, a valve by which movement of the piston is controlled, means tending to close the valve, and means for holding the valve initially open and freeing it for closure in the movement of the base.

12. The combination with a frame provided with ways, of a jack-base slidable in the ways between work-receiving and operating positions, a last-spindle and a last-bed-piece movable on the base, and tracks extending along the ways and by which the movements of the spindle and bed-piece are controlled.

13. The combination with a frame provided with ways, of a jack-base slidable in the ways between Work-receiving and operating positions, a last-spindle and a last-bed-piece movable on the base, means for yieldably elevating the spindle and bed-piece for engagement by the work, and tracks extending along the ways and respectively provided with portions for controlling the spindle at the work-receiving position and the bed-piece at the operating position.

14. The combination with a frame provided with ways, of a jack-base slidable in the ways between work-receiving and operating positions, a

passage is controlled, a lever fulcrumed upon the 5 piston and engaging the valve, means tending to normally elevate the spindle, means tending to normally elevate the piston, and tracks arranged for engagement :by the spindle and lever, respectively, during movement of the jack-base.

JOHN F. STANDISH.

. 8 REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,996,879 Pope Apr. 9, 1935 1,920,281 Standish Aug. 1, 1933 2,324,479 Brandt July 20, 1943