US1069218A

US1069218A - Pulling-over machine.

Info

Publication number: US1069218A
Application number: US65583311A
Authority: US
Inventors: Arthur Bates
Original assignee: United Shoe Machinery Co AB
Current assignee: USM Ltd; United Shoe Machinery Co AB
Priority date: 1911-10-21
Filing date: 1911-10-21
Publication date: 1913-08-05
Anticipated expiration: 1930-08-05

Description

A. BATES.

PULLING-OVER MACHINE.

APPLICATION FILED 001'. 21, 1911 Patented Aug. 5, 1913.

2 SHEETS-SHEET 1.

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A. BATEs. PULLING-OVER MACHINE. APPLICATION FILED OGT.21, 1911.

Patented Aug. 5,, 1913 2 SHEETS'SHEET 2.

Z?M I c. (Q. 'firiM/Z 794 UNITED STATES PATENT OFFICE.

ARTHUR BATES, OF'COUNTY OF LEICESTER, ENGLAND, ASSIGNOR T0 UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW TTERSEY, A CORPORATION OF NEW JERSEY.

IULLiNG-OVER MACHINE.

Specification of Letters Patent.

To all whom it may concern:

Be it known that I, ARTHUR BATES, a subject of the King of England, residing at Leicestershire, England, have invented certain Improvements in Pulling-Over Machines, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.'

This invention relates to machines for working uppers over lasts and particularly to machines of the type of the pulling over machine shown in Letters Pateht of the United States 663,777, Dec. 11,' 1900. In the machine therein shown are toe and side grippers which are adjustable relatively for large and small shoes and-the side grippers are guided in such adjustments obliquely inwardly and backwardly and vice versa, substantially perpendicular to the diverging side edges of the forepart of a conventional shape of last, said. directions being con-- trolled through sliding connections between the lower portions of the grippers and oblique guides. This-direction of adjustment is advantageous for bringing the grippers into suitable relation to other parts of the machine to enable them to coiiperate to the best advantage in working upon shoes of varying sizes. The tackers of that machine,

which cooperate to fasten the upper pulled over by each gripper, are similarly guided obliquely in the frame of the machine. The said adjustment of the grippers is efiected through the spreading means which at the end of each cycle restores the grippers to relative shoe receiving positions and during .ea'eh cycle is retracted to permit the overdrawing movement of the grippers by which the 'upper is carried inwardly over the shoe bottom toward position to be fastened by the tackers. The overdra'wing movement is .efiected by springs arranged in the frame at the outer side of each gripper where they are compressed when the grippers are spread and are able to react to force the grippers inwardly for overdrawlng when the spreader is retracted. I The direction of this overdrawing movement of the side grippers movement of the side grippers is oblique to the median line of the machine and t0 the median line of the shoe'which is being opgripper, they tend to draw the entireforward portion of the shoe upper rearwardly' as well as inwardly. It was considered at the time of the invention represented in that patent that the ideal diIBCtlOIl'fOI' the over- Patented Au .5,1913.

draw movement was" perpendicular to the inwardly instead of running off toward the heel of the shoe more or less as they do when overdrawn obliquely. V

With these conditions in view, provision :is made in accordance with an important feature of th s mvention for overdrawmg,v

the upper by the sidegrippers of a pullingover machine in a direction normal .to the median line of the machine. It is, however,

important to preserve the oblique initial relation of the side rippers to, one another,

parallel with the e ges of the last, for seizingthe upper because it would be less convenient to insert the upper between the gripper jaws if they did not extend in substantially the direction in which the upper extends along the side of the last. In accordance, therefore, with another very important feature of this invention provision is made for positioning the grippers with their jaws extending- 1n diverging directions, as parallel with the side aces of the last, and for directing overdraw movement of the grippers in directions normal to the median line of the last.

In carrying out this invention according to the illustrated embodiment thereof the aforementioned uides which control the direction of over awinglmovement, and of adjustment, of the side grippers are angularly movable so that after the grippers have seized the upper the guides can be moved to a position in which they will direct the overdrawing movement in lines normal to the median line of the last. The extent of this movement. of the guides can be varied to ob tain any desired direction of overdraw movement approximating the normal to the median line. Also as herein shown and in accordance with another feature of the invention the movement or adjustment of the said guidesis accompanied by, and preferably is made to produce, a turning movement of the sidegrippers from their upper receiving positions parallel with the diverging sides of the last into positions parallel with the median line of the last. This adjustment, accompanied by turning of the grippers, is made to take place automatically and is followed by an automatic restoration of the grippers to their angular upper receiving positions, and this is another feature of the invention. This new movement is made to take place in time relation to other gripper movements, and occurs as herein shown near the end of the updrawing stroke of the gripper operating cam, although it is to be remembered that this cam movement'is transmitted yieldingly so that in some instances the actual updrawing movement may have ceased before the turning movement will take place. Provision is made for adjust ment by which the turning movement will occur earlier or later. The turning movement of the gripper while it holds the upperunder strain has an advantageous effect in that it twists the upper and carries the portion held by the rear ends of the gripper jaws, and which extends about the last in the rear of the tip seam, farther inwardly over the last bottom than the portion which is adjacent to the tip seam and is held by the front ends of the jaws. This effect-s additional straining and overdrawing of the more stretchy portion of the shoe vamp.

This turning movement'also hasthe effect of carrying forwardly as well as inwardly the upper from the rear of the grippers and causes it to lie in a desirable manner in over the shoulder of the last edge that is located where the shank joins the ball of the last. The upper is fastened by a plurality of tacks in the described overdrawn position and lies into the shank better than it otherwise would do in the side lasting operation.

These and other features of the invention, including certain details of construction and combinations of new devices with old mechanisms, will'now be described and will then be pointed out in the claims.

Figure 1 is a side'elevation of a pullingover machine of the type represented in-said rior patent and equipped with the present improvements; Fig. 2 is a section approxi-n weenie mately perpendicular to the plane of the shoe bot-tom in-Fig. 1 and extending through the tip straightening mechanism by which the opposed side grippers can be adjusted simultaneously in opposite directions lengthwise of the last for shifting the pulled upper longitudinally around the last; said section also shows the toothed shaft of the foredrawing mechanism by which the two side grippers are moved simultaneously in the P same direction to draw the upper forwardly at the two sides of the last. These two mech anisms are not new with me, the tip straight ening mechanism being like that shown in said prior patent, while the fo-redrawing mechanism is like that shown in United States application Serial No. 577,054, filed Aug. 13, 1910, and these mechanisms are here shown only for the purpose of disclosing their cotipcrative relation 'to the mechanism which is added to the machine by the resent invention" Fi 3 is in section taken approximately parallel to the plane of the shoe bottom in Fig. l and extending through the grippers and directly above the fore and to British specification 1230 1 /03 for detailed description of the machine as a whole and. it will, thereforeybe only necessary to refer here briefly to the general construction.

The head of the machine has bearing for a cam shaft 2 by which are turned updraw cams shown in dotted lines in Fig. 1, which have connection with the gripper closing and updrawing levers 4.. From these levers depend the toe gripper mechanism and the two side gripper mechanisms, the latter of which each comprises a bar 5 suspended from a lever 4 by a ball connection which permits universal movement of the side gripper. Each bar 5'extends through a gripper casing 6 and is operatively connected to the gripper aws so that upward movement of the bar first closes the jaws and then lifts them, together with the casing 6, for seizing and then updrawing the upper to strain it about the last which is rested upwardly against the sole or bottom rest '8, The sole rest als o has a downward movement derived from a cam on the shaftv '2,

by means'of which it takes part in the upper straining operation. The cam shaft 2 has yielding connectionbetween .them as fully explained in said British specification 12,304/03. The front, yieldingly driven section has an upright arm 12 fromwhich is forwardly projected arod 13 encircled byia sprin 14, passing through a block swiveled in a ever 15' that has a depending handle and is fast on a rock shaft 16, Fig. 2, of the foredrawing mechanism. By toothed portions the shaft 16 has drivin'g engagement with blocks 18 to slide them forwardly and backwardly in the machine head. In these blocks, and moved lengthwise of the shoe with and by them is the toothed rock shaft 20 of the tip straightening mechanism. This rock shaft, .to which a hand lever 21 is fastened, has driving engagement with a rack bar 22 located under it. and with a rack bar 23 located over it, said bars being conside gripper for moving said grippers r..- spectively in opposite directions simultaneously to adjust the upper held by them around -the last for straighteningthe toe tip seam.

In accordance with this invention the front end of. each

rack bar

22, 23 has a pivotal connection with ahorizontally extending gripper guide 25, which formerly was integral with the rack bar and constituted a rigi head therefor as in Fig. 33 of said Patent 663,777. In eachguide 25 slides the horizontal member 26 of a connection which comprises also a vertical member 28 with which the gripper casing has sliding engage-- ment upwardly and downwardly by reason of.

the actuation of updraw lever 44. The pivoted gripper guides 25 are connected together at their adjacent ends by a linkor block 30 which is in turn pivoted to a lever 32 and constitutes an equalizer between the two guides for transmit-ting movement.of the lever 32 and a compensator for permitting use, Fig.

4, of the tip straightening mechanism'without disarrangin the connection with lever 32. Said lever is 'fulcrumed to a bracket 34 on the machine head and has at its outer end an operative connection witha rod 35 which is movable endwise in the head by a, bell crank 36, 37, fulcrumed at 38. The rear arm 37 of this bell crankhas a roll resting onthe upper edge of a cam block 40 that is adjustably attached at 39 to the yieldingly driven section of-the slide which actuates the foredrawing devices. -By these connections the gripper guides 25, 25 are turned together automatically in time relation to other gripper movements. Each of the gripper casmgshas an inwardly extending abutment 41 that is held against the guide 25 for that gripper by the pressure of the overdraw springs 42,- 42 which act laterally against the gripper casing through the plate 43. Throu h engagement with said abut-- s5 ments 41 t e guides "25 transmit turning nected respectively with the left and right movement to the gripper casings, the ball connections ofthe rods 5 with updraw levers approximately in" the line of the updrawing stralnon the upper. An abutment 45 located on the outer side of each rack ,bar 22, I

23 limits-the outward turning of'the guides and grippers, any excess of movement from cam 10 being taken up by the spring that connects the sections of the cam actuated slide. This arrangement provides for turning the grippers, during each cycle of the machine, from a position such as that shown in Fig. 3 where the jaws are parallelwith the side edges of the last and with the portion of upper which they are to seize, into the position shown in Fig. 4 where the jaws are approximately parallel with the median line of the last and the guides 25 extend in a direction approximately perpendicular, or

ing the lastpart of the updrawing movement of the grippers or after the updraw may have been completed. The adjustment for the camblock at 39 permits selection of the exact time bestsuited to'the requirements ofthe work'iii hand. In any case this turningor angular adjustment of the grippers in the illustrated embodiment of the invention, takes place in advance of and preiparatory to the overdrawing movement an positions the gripper guides 25,. 25 for directing that movement in lines approximately normal to the median line of the last instead of in lines inclined at a substantial angle backwardly toward the heel of the last.- The overdraw movement is effectedby the action of the

springs

42, 42 whenthe spreader 50, shown in detail in Fig. 37 of allows a spring 52- to return the side grip go' pets to their angular position, Fig. 3, ap. proximately parallel with the sides of the last. The angularity of this position can be varied to suit lasts having more. or less diverging sides by. djustment of the weentric connection 54 between the bell crank arm 36 and the slidin rod 35. The equalizer 3O permits one si e gripperjtojbe posi-I "tione'd' at a slightly different angle from the other one for unsymmetrical lasts, whichjgb are sometimes nearly straight on the inner side and have a large sWin' on the outer side. -With' t e vpresent improvement each gripper cantake, during normal to the median line of the last during the overdraw movement. Thus the up per'is drawn squarely across the last bottom and the overdraw has not the backward component ofymovement which tends to cause the tip seam to run ofi toward the heel of the last. The' turning of the grippers preparatory to the overdrawing movement carries therear ends of thejaws inwardly,

as will be evident from a comparison of Figs. 3 and 4, and causes a tightening of the portion ofupper'held by the rear'ends ofthe jaws relatively to, the portion at or nearer to the tip seam. It will be understood that ,the' ,foredrawing mechanism drafts the u perforwardly on the last, as contemplate by priorrinventions, and that the new direction ofoverdrawing carries the upper inwardly over the last bottom without counteracting the eifect of the foredraw by dragging the upper. backward.

V The operation 'ofthejmachine has been sufficiently set forth in connection with the foregoing description to make it clear.

Having explained the nature of the invention and described a pre'ferred embodiment thereof, .IicIaim as new and desire to secure by Letters Patent of the United States 1. Apulling over machine having, in com-- bination, grippers located on opposite sides of the last, means for relatively moving the grippers and the last for straining the upper about the last; and means by whichto efiect turning movement of a side gripper,

while it holds theupper, about an axis extending in substantially the direction ofthe pulling strain. 7

2 A pulling over machine having, in combination, grippers located on opposite sides of the last, means for relatively moving the grippers and the last for straining the upper about the last; 'and means by which to impart to the side grippers, while they hold the upper, turning movements to change the position of the jaws from ap-' proximate parallelism with the respective sides of the last into approximate parallelism with the median line of the-last.

3. A pulling over machine having, in combination, grippers located on opposite sides i of the last, means for relatively moving the or inclination ghaaajie grippers and the last for straining the upper about the last and for actuating the grippers to draw the upper over the last bottom and means for turning the grippers, while they hold the upper and prior to the overdraw,about axes substantially perpendicular to the plane of the shoe bottom.

4. A pulling over machine having, in combination, grippers located on opposite sides of the last, means for relatively moving the grippers and the last for straining the upper about the last; and means for actuating the side grippers, while they hold the upper, to carry the rear ends of the gripping jaws and the portions of stock held thereby on both 80 sides of the last inwardly relatively to the front ends of the jaws.

5. A pulling over machine having, in combination, rippers located on opposite sides of the las means for relatively moving the grippers and the last for straining the upper about the last, means for actuating the grippers to effect overdrawin of the upper, gripper guides for controlling the direction of overdrawing movement; and means for adjusting said guides angularly in the same direction toward the centerfline of the last to vary alike for both side grippers thedirection of the overdrawing movement.

6. A pulling over machine having, in combination, grippers located on opposite sides of the last, means for relatively moving the grippers and the last for straining the upper about the last, means for actuating the grippers to eliect overdrawing of the upper, gripper guides normally-extending obliquely to the median line of the machine for controlling the direction of the overdrawing movement; and means for adjusting said guides automatically after the grippers have seized the stock and before the termination of the overdraw. V I

7. A pulling over machine having, in combination, grippers located on opposite sides of the last, means for relatively moving the grippers and the last for straining the upper abo lt the last, means for actuating the grippers to ,efiect overdrawing of the upper,

gripper guides which position the gripper" ]3.WS angularly and relatively to the edge of the last for seizing the upper; means operating as a part of the normal operation of the machine for turning the guides to position the grippers more nearly parallel with one another after the upper has been seized, and means for actuating the grippers along the guides so positioned for eiiecting the overdrawing of the upper.

8. A pulling over machine having, in combination, grippers located on opposite sides of the last, means -for relatively moving the grippersand the last for straining the upper about the last, means for actuating the grippers to efiect overdrawing of the upper; and means permitting angular positions of the grippers with their jaws parallel to the diverging right and left sides of the last for seizing the upper and operatin after the upper has been seized to cause t e grippers to move parallel with thetoe tip seam in overdrarzing the upper.

9. A pulling over machine having, in com bination, grippers located on opposite sides of the last, means for relativel moving the grippers and the last for straining the upper about the last,'means for actuating the grippers to effect overdrawing of the upper; and mechanism for controlling the angular posi tion of the gripper jaws operating to locate the jaws parallel to the sides of the'last for gripping and-to turn them into right angular relation to the tip seam for overdrawing. 10.- A pulling over machine having, in combination, grippers located on opposite sides of the last,means for relatively moving the grippers and the last for straining the upper about the last, means for actuating the grippersto effect overdrawing of the upper; and controlling mechanism operating to locate the jaws of the grippers paralle to turn the grippers in the direction to tighten the upper held by their rear ends inwardly over the last edge, and to direct .overdrawing movement squarely across the last bottom at right angles to the median line of the last.

a 12. A pulling over machine having, in

combination, grippers located on opposite sides of the last, means for relatively moving the grippers and the last for straining the upper about the last, and mechanism at tached to one lateral edge .ofeach side gri per and arranged for operation to turn t e grippers. P j

13. A pulling over machine having, in combination, -grippers located, on opposite sides of the last, means for relatively-moving the grippers and the last 'for straining the upper about the last; and mechanism at tached to one lateral edgeofeach side gripper and operating automatically. in time relation-to the updrawing movement to twist as well as to strain upwardly the upper.

14. A pulling over machine having, in combination, grippers located on opposite sides of the last, means for relatively moving the grippers and the last for straining to the diverging. sides of the last for gripping and combination, grippers located on opposite sides of the last, means for relatively moving the, grippers and the last for straining the upperabout the last, means for actuating the grippers inwardly over the last bottom to overdraw the upper; and means op-. erating automatically to cause a greater overdrawing strain on the port-ion of upper which is held by the rear ends of the gripper jaws and extends about the ball of the last than the overdrawing strain on the portion of upper which is held by the front ends of the jaws and extends across the last at or near the toe tip seam location.

16. pulling over machine having, in combination, grippers located normal to the opposite sides of the last, means for relas tively moving the grippers and the last for straining the upper about the last; and mechanism by which overdrawing of the upper is effected in lines normal to the median lineof the last without special attention from the operator.

17-. A pulling over machine having, in combination, grippers located on opposite sides of the last, means for relatively moving the grippers and the last. for straining the upper about the last; and mechanism which canbe adjusted to effect overdrawing of the upper in lines normal to the median line ofthe last or inclined more or less in either direction relatively thereto and auto matic operating means for said mechanism.

18. A pulling over machine having, in

combination, grippers located on opposite returning the grippers to normal angular shoe receiving position.

having, in combination, grippers located on opposite sides of the last, means for relatively moving the grippers and the last for straining the upper about the last; and mechanism operating automatically to turn the side grippers from one angular relation to'the median line of the machine to another relation and back again during each pulling over operation. g

20. A pulling over machine having, in combination, grippers located on opposite 19. A pulling over machine sides of the last, means for relatively m0ving the grippers and the last for straining tion to the upper straining movement and connections from the driver to the side grippers to turn them, said mechanism having provision for adjustment to vary sald time relation.

22. A pulling over machine having, in combination, grippers located on opposite sides of the last, means for relatively moving the grippers and the last for straining the upper about the last, means for efi'ecting foredrawing of the upper; and mechanism by which. overdrawing of the upper is etfected in lines substantially normal to the median line of the last.

23. A pulling over machine having, in combination, grippers located on opposite sides of the last, means for relatively mov ing the grippers and the last for straining the upper about the last, means for efl'ecting foredrawing of the upper; and guides operating to turn the grippers from upper receiving positions oblique to the median line of the last and direct overdrawing movement in lines substantially normal to the said median line.

24. A pulling over machine having, in combination, grippers located on opposite sides of the last, means for relatively moving the grippers and the last for straining the upper about the last, means for effecting foredrawing of the upper, means for moving the side grippers respectively in opposite directions for straightening toe tip seams; and mechanism connected with said side grippers to change their angular relation to the median line of the last between the gripping and the overdrawing of the upper and having an equalizer to permit the tip straightening movement of the grippers.

25. A pulling over machine having, in combination, grippers located on opposite sides of the last, means for relatively moving the grippers and the last for straining the upper about the last; a guide for each gripper slidingly connected therewith and having an abutting face for engagement with the gripper, and means for actuating the guide to turn the gripper through said connection and abutting engagement.

526. A pulling over machine having, in combination, grippers located on opposite sides of the last, means for relatively movoa ers ing the grippers and the last for straining the upper about the last; a guide for each gripper slidingly, connected with the rear lateral edge orrear end of the gripper, an abutting faoe'arranged forengagement with thegripper at the inner side of said connection, means for .yleldlngly holding the gripper against said abutting face, and means for operating the guide to turn the gripper against the pressure of said yielding holding means.

27. A pulling over machine having, in combination, grippers located on opposite sides of the last, means for relatively moving the grippers and the last for straining the upper about the last; and means for turning the side grippers, while they hold the upper under strain, about axes located forward of their rear ends whereby the rear ends are caused to draw the upper from the shank forwardly and inwardly over the shoulder of the lastedge that is located where the shank joins the ball of the last.

28. A pulling over machine having, in combination, grippers arranged to engage the upper at opposite sides of the last and actuating and controlling mechanism therefor operated and arranged to cause the grippers to stand with their jaws approximately parallel with the sideedge of the lastwhen they grip the upper and in their overdraw movement be approximately parallel with and move in a direction approximately perpendicular to the median line of the last.

29. A pulling over machine having in c0mbinati0n,'side gripper jaws that have a closing, an updrawing and an overdrawing movement and that While closing are approximately parallel with the portion of upper that they grip, and means to adjust both pairs of side gripper jaws together so that in their overdraw movement they shall be approximately parallel with and shall move in a direction approximately perpendicular to, the median line of the last.

30. A pullin over machine having, in combination, si e grippers, means for closing and for updrawing the grippers, ineans operatingautomatically for foredrawing the grippers, and means for efiecting overdraw movement of the grippers in directions approximately perpendicular to the median line of the last.

31. A pulling over machine having, in combination, side grippers, means for closing and for updrawing the grippers, means for toredrawing the grippers, and means for turning each side gripper on an axis extendingsubstantially in the direction of upward strain efi'ected by that gripper.

32'. A pullin over machlne having, in combination, si e grippers, means for closing and for updrawing the grippers, means for turning each side gripper on an axis extending substantially in the direction of upward strain eflected by that gripper, and means for effecting overdrawing movements of the grippers. I

33. A pulling over machine having; in combination, side grippers, means for closing and updrawing the grippers, and means acting on the grippers which can be caused to effect overdrawing of the marginal edge of the upper on both sides of the last in directions inclined forwardly on the, shoe bottom. j

34. A; pulling over machine havig, in combination, side grippers, means for c losing and updrawing the grippers, means for overdrawing the grippers, means for turn-' ing the-grippers after they have seized the upper, and means for returning the grippers to upper seizing position, said machine having provision for adjusting theangular position to which the side grippers are restored to suit the inclination of the side edge of the last to the median line of-the last.

35. A pulling over machine having, in combination, side grippers, means forclosing and updrawing the grippers, means for overdrawing the grippers, andmeans connected with both side grippers and arranged for adjustment to change simultaneously and in the same direction either forwardly or backwardly the angular relation of both side grippers to the median line of the last.

36. A pulling over machine having, in combination, side grippers, means for closing and updrawing the grippers,means for overdrawing the grippers, and means connecting the two side grippers and including an etjualizing. connection which governs the angular relation ofthe grippers to the median line of the last and permits the side grippers to adjust themselves unsymmetrically for lasts, the inner and outer sides of whichare inclined unequally to the median line of-the last.

37.'A pulling over 'machine having, in combination, side grippers, means for closing and updrawing the grippers, means for overdrawing the grippers, and mountings for said .side grippers permitting them to turn to aline the jaws with the diverging side edges of the last and connecting the opposite side grippers to cause one gripper to turn reversely to the other.

38. A pulling-over machine having, in

combination, shoe restlng means, grippers located on opposite sides of the last, and operating means efiecting relative move ments of the grippers and the last and arranged to cause the upper to be pulled with