US3579693A - Pincers assembly - Google Patents

Abstract

A PINCERS ASSEMBLY FOR STRETCHING AN UPPER ABOUT A LAST AND MOVING THE MARGIN OF THE UPPER INWARDLY OF THE INSOLE PERIPHERY. THE ASSEMBLY COMPRISES A PINCERS THAT IS MOUNTED IN A HOUSING WITH THE HOUSING BEING MOUNTED TO A SUPPORT FOR HEIGHTWISE MOVEMENT AND THE SUPPORT BEING MOUNTED TO A BASE FOR INWARD-OUTWARD MOVEMENT.

Description

C. A. ROBINSON Miy' '25', I971 FINGERS ASSEMBLY 4 Sheets-Sheet 1 Filed March -9, 1970 25, 1971 c. A. ROBINSON 3,579,593

rmcsns ASSEMBLY Filod March 9, 1970 4 Shuts-Shut I FIG-2 May 25, 1971 c. A. ROBINSON FINGERS ASSEMBLY 4 Sheets-Sheet 5 Filed March 9, 1970 5. 1971 C. A. ROBINSON 3,579,593

FINGERS ASSEMBLY Filedllarch 9, 1970 4 Sheets-Shut United States Patent 3,579,693 PINCERS ASSEMBLY Charles A. Robinson, Waltham, Mass., assignor to Jacob S. Kamborian, West Newton, Mass. Filed Mar. 9, 1970, Ser. No. 17,406 Int. Cl. A43d 23/00 US. Cl. 12--14.5 6 Claims ABSTRACT OF THE DISCLOSURE A pincers assembly for stretching an upper about a last and moving the margin of the upper inwardly of the insole periphery. The assembly comprises a pincers that is mounted in a housing with the housing being mounted to a support for heightwise movement and the support being mounted to a base for inward-outward movement.

In pending application Ser. No. 730,106, filed May 17, 1968, there is disclosed pincers assemblies, mounted to the legs of a heel clamp pad, for stretching a portion of an upper about a last and moving the margins of the upper portions inwardly of the insole periphery. This invention is concerned with an improved construction of a pincer assembly that is usable in the machine of said application.

While the illustrative embodiment of the invention discloses the pincers as operating on the breast line portions of the upper, it obviously is usable elsewhere as, for example, on the forepar-t portions of an upper.

In the drawings:

FIG. 1 is an elevation of the pincers assembly;

FIG. 2 is a section taken on the line 22 of FIG. 1;

FIG. 3 is a plan View taken on the line 3-3 of FIG. 2;

FIG 4 is a view taken on the line 44 of FIG. 3;

FIG. 5 is a representation of a shoe assembly in a machine having the pincers assemblies prior to the clamping of an upper against a last by the heel clamp pad;

FIG. 6 is a representation of the shoe assembly in the machine after it has been clamped by the heel clamp pad;

FIG. 6A is a view taken on the line 6A6A of FIG. 6;

FIG. 7 is a representation of the shoe assembly as it appears in the machine when the breast line portions of the upper margin have been gripped by the pincers;

FIG. 8 is a representation of the shoe assembly as it appears in the machine after the breast line pontions of the upper margin have been moved inwardly over the insole periphery by the pincers;

FIG. 8A is a view taken on the line 8A8A of FIG. 8;

FIG. 9 is a representation of the shoe assembly as it appears in the machine at the completion of a heel wiping operation.

Referring to FIGS. l-3, the pincers assembly comprises a base 10. A sleeve 12 is mounted for inward-outward movement in the base 10. A support 14 is secured to the sleeve 12. A return spring 16 yieldably urges the sleeve 12 and the support 14 outwardly to the FIG. 2 position. A depending lug 18 of a housing 20 is pivoted to the support 14 by means of a pin 22 so that the housing can swing heightwise with respect to the support. The inner portion of the housing bottom has an outer jaw 24 of a pincers 26 secured thereto by a pin 27.

A bar 28 is slidably mounted in the housing 20 for inward-outward movement. The inner end of the bar 28 is bifurcated to form a pair of legs 30 having inwardlyoutwardly extending slots 32 formed therein. An inner pincers jaw 34 of the pincers 26 is slidably mounted on the bar 28 for inward-outward movement by means of a pin 36 that is secured to the jaw and is slidably mounted in the slots 32.

3,579,693 Patented May 25, 1971 An air actuated motor 38 (FIG. 4) is mounted to the housing 20. The inwardly extending piston rod 40 of the motor 38 is secured to a block 42. A laterally extending pin 44 is secured to the block 42 and is slidably received in a slot 46 in the jaw 34.

A tension spring 48, extending between the support 14 and the housing 20, serves to yieldably urge the housing downwardly about the axis of the pin 22 to a position wherein buttons 50, that are secured to the housing, bear against the support 14. A lever 52 is pivoted to the support 14 by a pin 54. The lever 52 extends inwardly of the pin 54 beneath the bottom of the housing 20 and has a leg 56 that extends outwardly and upwardly of the pin 54 through a cut-out 58 formed in the bottom of the housing.

A cylinder 60 is rigidly secured to the top of the housing 20 and a cylinder 62 is rigidly secured to the top of the cylinder 60, the cylinders 60 and 62 forming exten sions of the housing 20. A piston 64, slidably mounted in the cylinder 62, has a downwardly depending piston rod 66 that is in alignment with the lever 56. A piston 68, slidably mounted in the cylinder 60, has a hollow, downwardly depending piston rod 70. The piston rod 66 is slidable in and extends through the hollow of the piston rod 70. A link 72 is pivoted to the back of the bar 28 by a pin 74. The link 72 extends upwardly and inwardly from the pin 74. The end of the link 72 remote from the pin 74 is formed intoa clevis 76 that is pivoted to the piston rod 70 by a pin 78. The pin 78 is slidable in a heightwise extending slot 80 that is formed in the piston rod 66.

Referring to FIG. 5, a pincers assembly is mounted to each of the legs 84 of a U-shaped heel clamp pad 86 by means of an arm 88 (FIG. 1) that is connected to its associated base 10 and that is mounted to its associated pad leg 84 in the manner disclosed in the aforementioned application Ser. No. 730,106. The heel clamp pad is part of a heel seat lasting machine.

Referring to FIG. 5, a shoe assembly is provided that comprises a last 90 (FIG. 6A) having an insole 92 secured to its bottom and an upper 94 mounted thereon in such a way that the margin of the upper extends away from the insole. The shoe assembly is supported bottom-up in the machine.

In the idle position of the machine: the heel clamp pad 86 is disengaged from the shoe assembly with the pad legs 84 in a relatively spread apart condition; there is no air entering the bases 10 so that the supports 14 are urged outwardly to the FIG. 2 positions by the springs 16; the piston rods 40 are retracted into the motors 38 so that the inner pincers jaws 34 are in the outer open positions shown in FIG. 2; the piston rods 66 are retracted into the cylinders 62; and the piston rods 70 are retracted into the cylinders 60 so that the pins 78 are at the tops of the slots 80 and the bars 28 are in outer positions.

In the operating cycle of the machine, the heel pad 86 is caused to move to a position wherein its bight 96 abuts the heel end of the shoe assembly, as shown in FIG. 5. After this, the pad legs 84 are swung inwardly to the FIGS. 6 and 6A position wherein they engage the side walls of the shoe assembly in the regions of the breast lines so that all of the inner wall of the pad 86 engages the upper in the heel portion of the shoe assembly. The heel pad 86 has a hollow interior which is inflated with compressed air at this time to cause it to press more firmly against the upper.

Due to the mounting of the pincers 26 to the heel clamp pad legs 84, the inward movement of the pad legs causes a corresponding inward movement of the pincers 26 to thereby locate the pincers 26 in registry with the breast line portions of the upper margin, as indicated in FIG. 6A, regardless of the width of the breast line portion of the last 90. At this time, the outer pincers jaws 24 are located outwardly of the breast line portions of the upper margin, the inner pincers jaws 34 are located above the breast line portions of the upper margin, and the breast line portions of the upper margin are held erect above the insole 92 by mechanism disclosed and described in the aforesaid application Ser. No. 730,106.

At this time, a ribbon of cement 98 (FIG. 8) is extruded against the periphery of the insole heel seat portion 100 by the cement applicator shown in the aforesaid application 'Ser. No. 730,106.

Now the motors 38 are actuated to move the piston rods 40 inwardly and thereby move the pins 44 inwardly. The inward movement of the pins 44 causes the inner pincers jaws 34 to move inwardly with the pins 36 moving inwardly in the slots 32 until the pins 36 reach the inner ends of the slots 32, after which continued inward movement of the pins 44 causes the jaws 34 to swing downwardly about the axes of the pins 36 with the pins 44 sliding in the slots 46. As a result, each jaw 34 is positioned inwardly of and in registration with its associated outer jaw 24 so that the breast line portions of the margin of the upper '94 are located between the jaws of the pincers 26.

At this time, pressurized air is admitted into the cylinders 60 through ports 102- and 104 (-FIG. 2.) to lower the piston rods 70 with the pins 78 moving downwardly in the slots 80. This causes the links 72 to move the bars 28 and the inner jaws 34 outwardly under the yieldable forces of the pressurized air in the cylinders 62 so as to cause the breast line portions of the upper margin to be gripped between the jaws of the pincers 26 as indicated in FIG. 7.

After this, pressurized air is admitted to the cylinders 62 through ports 106 (FIG. 1) to lower the piston rods 66 to cause the bottom of the piston rods 66 to engage the lever legs 56 and thus swing the levers 52 about the axes of the pins 54 so as to raise the housings 20 about the axes of the pins 22 against the forces of the springs 48. This raising of the housings 20 raises the pincers 26 and the breastline portions of the upper margin gripped by the pincers 26 under the yieldable forces of the pressurized air in the cylinders 62. This has the ellect of stretching the breast line portions of the upper about the last, the clamping force of the pad 96 being insufficient to prevent this stretching, but being suflicient to keep the top line 108 (FIG. 7) in position on the last.

After this, pressurized air is admitted into the sleeves 12 through ports 110 (FIG. 2) to move the supports 14, housings 20 and pincers 26 inwardly with the pincers moving to the position shown in FIGS. 8 and 8A. This has the effect of laying the breast line portions of the upper margin over the insole so that, in the below described wiping operation, wipers can effectively wipe the heel portion of the upper margin against the insole without the upper margin fading away from the wipers.

Now wipers 112 are caused to move forwardly from the phantom position of FIG. 9 to the solid position in a wiping stroke and thereby engage the upstanding lasting margin that extends from the heel end extremity of the shoe assembly to the breast line areas gripped by the pincers 26 and fold or wipe the margin against the insole 92 and bond the margin to the insole by means of the cement ribbon 98. During the wiping stroke, pressurized air enters the cylinders 60 through ports 114 (FIG. 2) to raise the pistons 68 and thus move the inner pincers jaws 34 inwardly so as to cause the pincers 26 to release the breast line portions of the upper margin. Therefore, the wipers 112 at the completion of the wiping stroke will not create stresses in the upper margin that are opposed to the stresses imparted by the pincers 26, which would have the undesired eifect of tearing the upper margin. Because the breast line areas of the upper margin, indicated in FIG. 9 by number 116, were laid down against the insole by the pincers 26 at the commencement of the wiping stroke, the wipers 112 are better able to wipe or fold the full width of the heel portion of the upper margin against the insole. The pincers 26 are located towardly of the forwardmost position assumed by the wipers 204 at the completion of the wiping stroke, so that there is no danger of interference between the wipers and the pincers.

After the completion of the wiping stroke, the parts that have not already done so are returned to their idle positions and the machine cycle is completed.

I claim:

1. For use in a lasting machine that wipes an area at an end of the margin of an upper that is mounted on a last against an insole located on the last bottom, a pincers assembly for stretching a portion of the upper that is forward of said area about the last and for moving the margin of said upper portion inwardly of the insole periphery so that the entire potential width of said area of the upper margin may be wiped against the insole comprising: a base; a support mounted to the base for inward-outward movement; a housing mounted to the support for heightwise movement; an outer pincers jaw secured to the housing; a bar mounted to the housing for inward-outward movement; an inner pincers jaw' mounted to the bar for heightwise movement; means for initially maintaining the support in an outer position with respect to the base; means for initially maintaining the housing in a lower position with respect to the support; means for initially maintaining the bar in an inner position with respect to the housing; means for initially maintaining the inner pincers jaw in an upper position with respect to the bar; means for lowering the inner pincers jaw with respect to the bar so that it is inwardly of and in alignment with the outer pincers jaw; means for thereafter moving the bar outwardly with respect to the housing to move the inner pincers jaw towards the outer pincers jaw and thereby cause the upper margin portion to be gripped by the pincers jaws; means for thereafter raising the housing with respect to the support to, stretch said upper portion about the last; and means for thereafter moving the support inwardly with respect to the base to move the gripped margin of said upper portion inwardly of the insole periphery.

2. The pincers assembly as defined in claim 1 wherein the inner pincers jaw is mounted to the bar for inwardoutward movement and further comprising: means for initially maintaining the inner pincers jaw in an outer position with respect to the bar; and means for moving the inner pincers jaw inwardly with respect tothe bar prior to the lowering of the inner pincers jaw with respect to the bar.

3. The pincers assembly as defined in claim 2 wherein the mounting of the inner pincers jaw to the bar for heightwise and for inward-outward movement comprises: an inwardly-outwardly extending slot formed in the bar; a pin movably mounted in the slot and to which the inner pincers jaw is mounted; a second slot formed in the inner pincers jaw above the first pin; a second pin movably mounted in the second slot; a drive member mounted to the housing; a rod mounted to the drive member for inward-outward movement; and means securing the rod to the second pin.

4. The pincers assembly as defined in claim 1 wherein the means for moving the bar outwardly with respect to the housing comprises: a rod mounted for heightwise movement in the housing; and a link so connecting the rod to the bar as to move the bar outwardly in response to downward movement of the rod; and wherein the means for raising the housing comprises: a second rod mounted for heightwise movement in the housing; and a lever, pivoted to the support and underlying the housing, having a leg in alignment with the second rod, whereby downward movement of the second rod against the leg acts to cause the lever to raise the housing.

5. The pincers assembly as defined in claim 4 wherein the inner pincers jaw is mounted to the bar for inwardoutward movement and furthercomprising: means for initially maintaining the inner pincers jaw in an outer position with respect to the bar; and means for moving the inner pincers jaw inwardly with respect to the bar prior to the lowering of the inner pincers jaw with respect to the bar.

6. The pineers assembly as defined in claim 5 wherein the mounting of the inner pincers jaw to the bar for heightwise and for inward-outward movement comprises: an inwardly-outwardly extending slot formed in the bar; a pin movably mounted in the slot and to which the inner pincers jaw is mounted; a second slot formed in the inner 10 pincers jaw above the first pin; a second pin movably mounted in the second slot; a drive member mounted to References Cited UNITED STATES PATENTS 2,697,237 12/ 1954 Hubbard 1214.5 2,925,613 2/ 1960 James 12--14.5X 3,008,157 11/ 1961 Weinschenk 12'14.5X

PATRICK D. LAWSON, Primary Examiner

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