US2445845A

US2445845A - Lasting machine

Info

Publication number: US2445845A
Application number: US738868A
Authority: US
Inventors: Corwin W Baker
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1947-04-02
Filing date: 1947-04-02
Publication date: 1948-07-27
Anticipated expiration: 1965-07-27

Description

July 27, 1948. c. w. BAKER 2,445,845

LASTING MACHINE Filed April 2. 1947 2 Sheets-Sheet 2' 360 366' 25 &5z I Z70 Patented July 27, 1948 UN ITEDJ STATES PATENT OFF ICE LASTING MACHINE Corwin W. Baker, Beverly, Mass, assignor to United Shoe Machinery Corporation, Flemington, N. La; corporation of New Jersey Application April2, 1947, Serial No. 738,868

21*Claims.

This invention relates to machines for operating on shoes and is hereinillustrated as embodied in a lasting machine ofthe type disclosed in an application for United" States Letters Patent Serial No. 680,013, filed inmy name on June 28, 1946, now Patent No. 2,431,362. However, it is to be understood that the invention is not limited to a machine organization of the particu ar character disclosed in saidpatent.

In the machine of the aforementioned patent, the stock is tensioned, heightwise'of a shoe, by grippers which are'alsomovable-in a direction to feed the shoe, and the lasting marginof, the tensioned stock is wiped in over, and "pressed against, the bottom of the shoe by meansof a reciprocating wiper, operating in time relation to the tensioning'and feeding movements of the grippers. For applying additional pressure to the lasting margin, thus to augment thepressing action of the wiper in securing the lasting margin adhesively in lasted position, a presser member is provided which is arranged to cooperate with a shoe-bottom rest for supporting the shoe against the pull applied by the gripper; this presser member and shoe-bottom rest being arrangedto move with the gripper when the shoe is being fed' and the stock tensioned. During the back-feeding movements of the gripper, shoe-bottom rest and presser member, retrograde movement of the shoe is prevented by the pressure then' being applied to the lastingmargin of the stock by the wiper.

After the completion of the lastingoperation, the exposed surface of the lasting margin-of the stock is next roughened to condition it for the reception of adhesive usedfor attaching an outersole to the bottom of the shoe. This is usually done by presenting the bottom of the shoe to an abradin-g tool, for example, a rotary wire brush, and involves a separate operation in the manufacture of the shoe requiring the extra time and labor of a skilled workman.

It is an object of this invention to avoid the extra time and labor, as well as theresulting expense involved in the above procedure, by combining the lasting of thestock and the roughening of the exposed surface of its lasting margin on the bottom of the shoe in-a single operation. With this end in view, and in accordance with a feature of the invention, the herein illustrated machine, which like the machine of the mentioned patent has grippers for tensioning thestockand feeding the shoe, is provided with means for abrading the exposed surface of the lasting margin of the stock as the lasting, operation proceeds, so

2 that, upon the completion of the lasting operation,the bottom of the shoe is in condition to receive adhesive for the attachment of an outersole thereto. i

More particularly, and in accordance with a further feature of the invention, the abrading means comprises a rotary tool which is also arranged to havea component of action directed inwardly from the edge of the shoe bottom for wiping the lasting marginof the stock in over, and for pressing it against, the shoe bottom.

Accordingly, the roughing tool serves also as a wiper which, in the herein illustrated machine, is substituted for the reciprocating wiper of the machin disclosed in the aforementionedpatent and 'is located closely adjacent to the'tensioning and feeding gripper. Thus, as this gripper tensions the stock heightwise of the shoe,=the lasting margin is not only drawn against the tool and abraded thereby but also is wiped inwardly from the-edge-of, and pressed against,- the shoe bottom. Preferably, and as herein illustrated, the pressing member of the machine-of the aforementioned patent is retained to augment the action ofth e roughing tool in pressing the lasting margin against the'bottom of the shoe and also to cooperate withthe shoe-bottom rest in supporting the sh-oe against the pull applied to :the stock bythe gripper. Y i

The. above and other objects and features of the invention will be apparent from the following detailed description of a preferred embodiment thereof, illustrated in theaccompanying drawings, and willbepointed out in the claims.-

In theidrawings,

Fig. 1 isa view, inside elevation and with certain portions broken away, of alastin-g machine embodying the features of this invention; Fig. 2 is a View, in front elevation and with parts broken away, of the machine *shownf in Fi 1;

Fig; 3 is a detail view of "one .ofthe operating elements of themachiney' Figs'.4 to9 are-aaseriesof views, in plan: and side elevation, of the-operating elements of the machine shown-indifferent posit-ions assumed during the lasting .of a. shoe.

The. herein illustrated machine is, ,withone exception to be noted, below, exactly like the lasting ma chine. disclosed .in .the above-mentioned patent and is providedwith a gripper comprising an upper jaw 20 and a lower jaw 22, a presser member '26, a shoe-bottom rest 28 and a,.pair,l of edge gage ,rolls .60; 30. However, for the purposes gof this invention; in place of the recipro-i eating Wiper (24) of the machine of my prior patent, th herein illustrated machine is provided with a rotary tool indicated generally by the reference character 24. These operating instrumentalities are all associated with a hollow head 32 having a hinged cover 34. The gripper jaws 23,22, presser member 23 and shoe-bottom rest 28 are operated by mechanism contained within the head 32 and, inasmuch as this operating mechanism is exactly the same as that disclosed and described in the above-mentioned patent, it will be but briefly referred to herein. In order to facilitate reference to the prior application for an understanding of the construction of this mechanism, the corresponding parts of the herein illustrated machine are identified in the drawings with the same reference characters as were used in the prior patent.

The upper jaw 23 is secured, by means of screws 4ll,to a slide 42 which is mounted in suitable guideways, not shown, formed in a radially extending portion 46 of a hub 48. This hub has a downwardly projecting post 50 which is jour-' naled in a portion of the head 32, see Fig. 1. The lower jaw, is pivotally mounted on the slide 42, by means of a pin 64, and a compression spring 18 is arranged to swing this jaw, in a clockwise direction about the pivot provided by the pin 54, thus yieldingly to close the jaws. For opening these jaws, against th action of this spring, a toggle comprising links 92, 94 is provided. The link 92 is connected to a portion of the lower jaw 22 while the link 94 is pivoted to a post 96 which rises upwardly from the slide .42. The link 94 is also provided with a flat surface 38 for engagement with a roll mo carried by an arm I02. As in the machine of my prior patent, this arm is oscillated, by means of a cam, not shown, and through connections including a rod I50 and links Hi8, H0, in such a way that the jaws are periodically opened and closed. Also the slide 42 is reciprocated, to move the jaws in a direction extending heightwise of a shoe presented to the machine, and the hub 48 is oscillated, to swing the jaws in a direction extending lengthwise of the shoe, in time relation to the operation of the gripper jaws, by cam-operated mechanism not shown but similar to that in my prior machine.

The rotary tool '24, which as has already been noted replaces the reciprocating wiper of the prior machine, is formed on the lower end of a shaft 23!). This shaft, which is journaled in a bearing block 232 and held against axial movement therein by

collars

234, 236, extends downwardly through a clearance opening 233 provided in the cover 34 and the bearing block is pivotally mounted on a yoke 240, by means of

trunnion screws

242, 242. This yoke has a cylindrical stem 244 which is adjustably secured, by means of setscrews 245, 246, in a bore 248 formed in the end of a support 250, carried by the cover 34. Extending between the bearing block 232 and the cover 34 is a turnbuckle 252. As will be readily apparent, by loosening the screws246 and operating the turnbuckle 252, the tool 24 may be suitably positioned relatively to the other operating elements of the machine and also with respect to the bottom of a shoe. and in the direction indicated by the arrows in Figs. 4, 6 and 8, by means of a belt 23! and a pulley 233, secured to the upper end of the shaft 230. This belt is connected to a power pulley, not shown, andi'strained over two idle pulleys carried by the support 250, one of which is indicated by The tool 24 is rotated, at a high speed the reference character 235 in Fig. 1 of the drawings.

The presser member 26 is pivotally mounted on the outer end of a bracket 260, by means of a stud 262, Figs. 4, 6 and 8, and a spring-pressed plunger 264, alined with the axis of this stud, yieldingly holdsthe presser member in the position in which it is shown in Figs. 1, 5 and 9 while permitting this member to rock about the axis of the stud 262 so as to lie flatly on the bottom of a shoe even if the latter is inclined in the manner shown in Fig. '7, The bracket 260 is adjustably secured, by means of a screw 266, to the front end of a slide 2'!!! which is mounted in a second guideway, not shown, formed in the extending portion 46 of the hub 48. This slide is reciprocated, to move the presser member toward and away from the bottom of a shoe, and is also swung by the oscillation of the hub 48 so. as to follow the swinging movements of the gripper jaws, by means of operating mechanism, not shown, but similar to that disclosed in the prior patent referred to above.

The shoe-bottom rest 28, which is secured to the hub 48 by means of screws 2%, 236, likewise partakes of the swinging movement of the gripper jaws. The edge gage rolls 3!), 30 are journaled on studs carried by a bracket 330 which is adjustably mounted on a forwardly projecting portion of the'cover 34 by means of a screw 302. The head 32 is provided withan opening 3|4 through which the operating elements, just described,

project.

Referring particularly to Figs. 3, 4, 6 and 8, the rotary tool 24 is formed by providing thelower end of the shaft 230 with a helical rib 400, of the generally triangular shape shown, and traversing this rib with a plurality of circumferentially spaced angular notches 422. These angular notches are so shaped with respect to the direction of, rotation of the shaft 238 that the tool 24 acts as a cutter or abrading device. Also, the pitch of the helical rib 400 is such that this tool has a component of action directed axially and downwardly thereof as viewed in Figs. 1, 3, 5, 7 and 9. a

Except for the action of the rotary tool 24, the herein illustrated machine operates to last a shoe, shown as comprising an upper U assembled with an insole I on a last L, in the same manner as the machine of my patent. Referring to Figs. 4 to 8 of the drawings, in Figs. 4 and 5 the operating elements of the machine are shown in the positions assumed at the beginning of a cycle of operations, the shoe-bottom rest bearing against insole I, the presser member pressing a portion of the lasting margin of the upper against the insole, and the gripper jawsclosed on the lastingmargin of the upper. As the operation proceeds, the gripper jaws move in a direction heightwise of the shoe, and to the right, to tension the upper over the last and, while the upper is thus being tensioned, these jaws, together with the shoe-bottom rest and presser member, which is still engaging the shoe bottom, swing in a direction extending lengthwise of the shoe-to feed the shoe, the operating elements eventually reaching the position shown in Figs. 6 and 7. The gripper jaws now open and the presser member is withdrawn from the shoe bottom, as these parts,

together with the shoe-bottom rest, swing in a sioned by the gripper jaws successively, in differant locations,.along the edge of the: bottom of. the shoe, and the lasting: margin of the upper is pressedagainst the insole by the presser memher and also by the rotary toolwhich engages the lasting margin in a location between the gripper jaws andthe presser member. As, will be understood, the lasting margin and/or the bottom of the insole will have been previously coated with suitable adhesive so that, as a result of theaforementioned pressing action, the lasting margin of the tensioned upper is adhesively secured in lastedposition on the insole. In additionto its'pressing function, the rotary tool wipes the lasting margin inwardly from the edge of the shoe'bottom, as a result of the axial com ponentof its action and, at thesame time, the teethbon this tool, formed by the notches M12, abrade theexposed surface of the lasting margin of the upper. This abrading, or roughing actionofthe tool, is augmented-by the tendency of the gripper jaws, at the end of their feeding movement, to wrap a portion of the lasting margin of the upper around the tool in the manner ill-ustratedin Fig. 6-.

During the operation of the machine, the shoe is guidedagainst the edge gage rolls 30, 3d and is held by the operator with its bottom substantially in a vertical plane normal to the directions of movement of the gripper jaws, presser mem her and shoe-bottom rest. However, should the shoe inadvertently be tipped so as to incline its bottomout of this vertical'plane, the lasting of the-"upper will not be adversely affected. Under such conditions, th presser member will pivot about the stud 282 so as to engage the lasting margin flatly, as shown in Fig. '7, and the gripper jaws will still wrap the lasting margin partly around the tool 25 and the functions of this tool to press the lasting margin against the shoe bottom and to wipe it inwardly from the edge thereof, as well as to abrade or rough the exposed surface thereof, will still be obtained.

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

1. In a lasting machine, the combination of means for tensioning stock to be lasted, successively-in different locations along the edge of the bottom of a shoe, and means for abrading the exposed surface of the lasting margin of the stock, said abrading means being constructed and arranged to wipe the lasting margin in over, and to press it against, the bottom of theshoe.

2LIna lasting machine, the combination of means for tensioning stock to be lasted, successively in different locations along the edge of the bottom of a shoe, means for abrading the exposed surface of the lasting margin of the stock, and means for pressing the lasting margin of the stock against the shoe bottom in each location.

3. In a lasting machine, the combination of means for tensioning stock to be lasted, successively in different locations along the edge of the bottom of a shoe, and means comprising a rotary tool for abrading the exposed surface of the lasting margin of the stock, said rotary tool being constructed and arranged to wipe the lasting margin in over, and to press it against, the bottom of the shoe.

4:. In a lasting machine, the combination of means for tensioning stock to be lasted, successively in different locations along the edge of the bottom of a shoe, and a rotary tool having anoperating face comprising an interrupted spiral rib for abrading the exposed surface of the lasting margin of the stock, saidl rotarytcol being iconstructed and: arrangeu towipez the-lasting mar: gin: in. over, andiwto press. it against; the-bottomof: the shoe? 7 i l i v 5. In a lasting machinathe. combination: of means for tensioning stock to be lasted; successively in: difierent locations along the ed'ge of the bottom-of a shoe, means for abrading the exposed surface of the lasting margin o f the stock, said abradin'g means being constructed and arrangedto' wipe the lasting margin in: over,- and to p'ress'it against; thebottomofthe shoe, and additional means for pressingithe lasting margin Offllle stock against the bottomof the "shoe;

6. In a lasting! machine, the combination: of means fortensioningstock to be lasted, successi'velyiri different locations along theiedge of the bottom of a shoe; means comprising" a ma mal for abrading I the exposed surface of: the lasting margin of the stockg said rotary tool being eon.- stru'cted and arranged to Wipe thelasting margin in over, and to press it against the bottom of the shoe, and additional means for pressing the lastingmargin oiithe stock against the bottom of the shoe.

'7. In a lasting machine, the combination of means for tensioning stock to be lasted, successively in di'fierent-locations along the edge of the bottom of a shoe, arotarytool having an operating face comprising an interrupted spiral rib for abrading the exposed surface of the lasting margin of the stock, saidrotary tool being constructd and arranged to Wipe the lasting margin inover, andto press it against, the bottom of the shoe; and an additional 'm'eansfor pressing the lasting margin of the stock against thebottom of theshoe. i v

8. In a lasting machine, the combination of means for" tensioning stocktobe lasted; successi'velyin different locations along theedge of the bottom of a shoe, and forfeedi ng the shoe, and means for abrading the-exposed su-rface of'the lasting-margin of the stock, said abrading means being constructed and arranged to wipe the lasting marginin" over, and to press-it against, the bottom of the shoe.

9. In a lastingmachine; the combination of means for tensioning stock to be lasted, successively in different locations; albngthe edge of'the bottom of a'shoe, and for feedingth'e shoe, means for abrading the exposed surface of the lasting margin" of thestock, and means for pressing the lasting margin of the stock against the shoe bottom in eachlocation. i

10. In a lasting machine, the combination of means for tensioning stock to be lasted, successively in different locations along the edge of the bottom of a shoe, and for feeding the shoe, and means comprising a rotary tool for abrading the exposed surface of the lasting margin of the stock, said rotary tool being constructed and arranged to wipe the lasting margin in over, and to press it against, the bottom of the shoe.

11. In a lasting machine, the combination of means for tensioning stock to be lasted, successively in different locations along the edge of the bottom of a shoe, and for feeding the shoe, and

a rotary tool having an operating face comprising an interrupted spiral rib for abrading the exposed surface of the lasting margin of the stock, said rotary tool being constructed and arranged to wipe the lasting margin in over, and to press it against, the bottom of the shoe.

12. In a lasting machine, the combination of means for tensioning stock to be lasted, successively in different locations along the edge of the bottom of a shoe, and for feeding the shoe, means for abrading'the exposed surface of the lasting margin of the stock, said abrading means being constructed and arranged to wipe the lasting margin in over, and to press it against, the bottom of the shoe, and additional means for pressing the lasting margin of the stock against the bottom of the shoe.

13. In a lasting machine, the combination of means for tensioning stock to be lasted, successively in different locations along the edge of the bottom of a shoe, and for feeding the shoe, means comprising a rotary tool for abrading the exposed surface of the lasting margin of the stock, said rotary tool being constructed and arranged to wipe the lasting margin in over, and to press it against the bottom of the shoe, and additional means for pressing the lasting margin of the stock against the bottom of the shoe.

14. In a lasting machine, the combination of means for tensioning stock to be lasted, successively in different locations along the edge of the bottom of a shoe, and for feeding the shoe, ;a rotary tool having an operating face comprising an interrupted spiral rib for abrading the exposed surface of the lasting margin of the stock, said rotary tool being constructed and arranged to wipe the lasting margin in over, and to press it against, the bottom of the shoe, and an additional means for pressing the lasting margin of the stock against the bottom of the shoe.

15. In a lasting machine, the combination of intermittently operating gripper means for tensioning stock to be lasted, successively in different locations along the edge of the bottom of a shoe, and means for abrading the exposed surface of the lasting margin of the stock, said abrading means being constructed and arranged to wipe the lasting margin in over, and to press it against the bottom of the shoe.

16. In a lasting machine the combination of intermittently operating gripper means for tensioning stock to be lasted, successively in different locationsalong the edge of the bottom of a shoe, and means comprising a rotary tool-for abrading the exposed surface of the lasting margin of the stock, said rotary tool being constructed and arranged .to wipe the lasting margin in over, and to press it against, thebottom of the shoe.

17. In a lasting machine, the combination of intermittently operating grippermeans for tensioning stock to be lasted, successively in different locations along the edge of the bottom of a shoe, means for abrading the exposed surface of the lasting margin of the stock, said abrading means being constructed and arranged to wipe the lasting margin in over, and to press it against, the bottom of the shoe, and additional means for pressing the lasting margin of the stock against the bottom of the shoe.

18. In a lasting machine, the combination of intermittently operating gripper means for tensioning stock to be lasted, successively in different locations along the edge of the bottom of a shoe, a rotary tool having an operating face comprising an interrupted spiral rib for abrading the exposed surface of the lasting margin of the stock, said rotary tool being constructed and arranged to Wipe the lasting margin in over, and to press it against, the bottom of the shoe, and an additional means for pressing the lasting margin of the stock against the bottom of the shoe.

19. In a lasting machine, the combination of intermittently operating gripper means for tensioning stock to be lasted, successively in different locations along the edge of thebottom of a shoe, and for feeding the shoe, means for abrading the exposed surface of the lasting margin of the stock, and means for pressing the lasting margin of the stock against the shoe bottom in each location.

20. In a lasting machine, the combination of intermittently operating gripper means for tensioning stock to be lasted, successively in different locations along the edge of the bottom of a shoe, and for feeding the shoe, and a rotary tool having an operating face comprising an interrupted spiral rib for abrading the exposed surface of the lasting margin of the stock, said rotary tool being constructed and arranged to wipe the lasting margin in over, and to press it against, the bottom of the shoe.

21. In a lasting machine, the combination of intermittently operating gripper means for tensioning stock to be lasted, successively in different locations along the edge of the bottom of a shoe, and for feeding the shoe, means comprising a rotary tool for abrading the exposed surface of the lasting margin of the stock, said rotary tool being constructed and arranged to wipe the lasting margin in over, and to press it against the bottom of the shoe, and additional means for pressing the lasting margin of the stock against the bottom of the shoe.

CORWIN W. BAKER.