US2332019A - Shoemaking apparatus - Google Patents

Description

1943- A. M. SIMPSON 2,332,019

SHOEMAKING APPARATUS I Filed Oct. 15, 1942 2 Sheets-Sheet l 1943 A. M. SIMPSON 2,332,019

SHOEMAKING APPARATUS Filed Oct. 15, 1942 2 Sheets-Sheet 2 Patented Oct. 19, 1943 SHOEMAKING APPARATUS Arthur M. Simpson, St. Louis, Mo., assi nor to United Shoe Machinery Corporation, Flemington, N. 5., a corporation of New Jersey Application October 15, 1942, Serial No. 462,097

8 Claims.

This invention relates to apparatus for use in assembling shoe parts and more particularly to a device of the type illustrated and described in Letters Patent of the United States No. 2,263,570, granted November 25, 1941, on an application of L. S. Curtin, for assembling the plug and vamp of a moccasin or a shoe having a moccasintype toe.

The apparatus illustrated and described in the Curtin patent comprises a plate for supporting a moccasin plug and a holddown which cooperates with the plate to clamp the plug thereagainst and to hold it while a moccasin vamp is assembled therewith. By thus supporting the moccasin plug, the beveled edges of the plug and a vamp which have previously been coated with adhesive may be readily pressed together, both hands of the operator being available for this operation thereby permitting rapid assembly of the parts.

It is an object of the present invention to facilitate still further the assembly of the vamp and plug and thereby to increase the output of the apparatus by the provision of improved means for holding the plug and for gaging the heightwise position of the vamp relatively thereto. This is accomplished, in accordance with the illustrated embodiment of the invention, by forming the support for the plug with a generally concave work-engaging surface and providing the central part of the holddown with a clamping member having a correspondingly curved, convex work-engaging surface so that when the plug is clamped between the support and the holddown the periphery of the plug is urged upwardly. The holddown is of sufiicient size so that it extends substantially beyond the periphery of the plug which is accordingly forced against the adjacent surface of the holddown, which thereby acts as a gage by which the heightwise position of the vamp relatively to the plug may be readily determined. Still further to increase the output of the apparatus and in accordance with another feature of the invention, the outer portion of the holddown is formed of transparent material, such as glass, to permit observation of the work by the operator during the assembly operation. This transparent portion of the holddown provides the surface against which the margin of the plug is forced and which gages the heightwise position of the vamp so that the edges of the plug and vamp will meet properly. By forming this portion of the holddown of transparent material, the operator is able to observe the margins of the plug and vamp as they are joined so that he is able to effect a proper union of the parts with a minimum of effort. It also facilitates the placing of accompanying drawings and pointed out in the claims.

In the drawings,

Fig. 1 is a perspective view of one form of apparatus in which the invention is embodied;

Fig. 2 is a vertical section through the support and holddown illustrating the manner in which a plug is held therebetween; and

Fig. 3 is a plan view showing the device being employed to hold a moccasin plug while it is being assembled with a vamp.

Referring now to Fig. 1, the apparatus is illustrated as including a base i9 arranged to be supported on a bench 12. The base includes an upwardly inclined arm I 4 to which a support It for a moccasin plug is secured by a screw 18 (Fig. 2). The plug support has an inwardly inclined work-engaging marginal portion 25 and an open central portion which thus forms a generally concave work-supporting surface. For holding a moccasin plug P against the work-supporting surface 28 of the support Hi there is provided a holddown 22 which is supported for movement toward and away from the support It by a lever 24 pivoted between spaced ears 26 of the arm I i. The holddown 22 includes a clamp 22% secured to the lever 24 by means of a pair of wing screws 3d. The under work-engaging surface of the clamp 26 has inclined outer edges to form a generally convex work-engaging surface complemental in shape to the work-engaging marginal portion 2% of the support it. The clamp is somewhat smaller in area than the support which is in turn smaller in area than the plug so that the margin of the plug is displaced upwardly by reason of the curvature imparted to the plug when it is held between the support and clamp.

The holddown 22 also includes a plate secured to the upper surface of the clamp 28 by screws as. This plate extends outwardly beyond the clamp 28 a substantial distance so that it also projects outwardly beyond the periphery of the plug P. This plate constrains the margin of the plug projecting beyond the support it against upward movement and the margin is thus held in the position shown in Fig. 2 against the under surface of the plate. The plate thus forms a gage by which the heightwise position of a vamp V to be assembled with the plug may be readily determined so that the edges of the vamp and plug may be properly registered. To permit observation of the edges of the vamp and plug by the operator during the assembly operation, the plate 32 is preferably formed of transparent material, such as glass, which thus makes it easy for the operator to make sure that the vamp and plug are being properly assembled. The transparencyof the plate also assists the operator in properly locating the plug on the support 16.

The support l6 and the clamp 23 are mounted for easy removal and replacement by supports and clamps of other sizes so that the apparatus may be employed for assembling Vamps and plugs of a wide range of sizes. In order that the holddown may engage the plug in the proper plane, adjustment of the angular relationship between the lever 24 and the holddown is afforded by the set screws 36 and a third screw 33 threaded through the upper end of the lever 24 and engageable with the upper surface of the transparent plate 32.

The lower end of the lever 24 is pivoted to the upper end of a treadle rod 49 which may be connected at its lower end to a treadle, not shown, so that by moving the rod 40 downwardly the holddown may be moved upwardly away from the support 16. The holddown is normally urged toward the support by a spring :2 surrounding the rod wand acting between a projection 44 of the base I6 and a nut and lock nut 46 threaded on the upper-end of the rod 49.

In the use of the apparatus the operator depresses the treadle thereby moving the holddown away from the support against the force exerted by the spring 42 to permit positioning of a moccasin plug on the support. The treadle is then released, whereupon the holddown moves toward the support to clamp the plug thereagainst. The margin of the plug is forced against the .adjacent surface of the plate 32 by reason of the curvature imparted to the plug by the generally concave surface of the support and the comple mental surface of the clamp so that the edge of the plug is held firmly in place against the plate. A vamp, which has its upper edge previously coated with adhesive, is then brought up against the under surface of the plate and moved inwardly toward the plug until the beveled edge of the vamp at the toe end is in contact with the edge of the plug. The vamp and plug may be suitably marked so that they may be readily centered relatively to each other and the operator then by means of his hands, starting at the toe end, forces the upper edge of the vamp against the plug progressively from the toe end rearwardly until the parts have been properly assembled. The plate 32 insures that the edges of the vamp and plug will meet properly by gaging the heightwise position of the vamp relatively to the plug, whereas the transparency of the plate permits-observation of thework by the operator so that a relatively inexperienced operator may effect a satisfactory assembly of the parts very rapidly.

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

1. Apparatus for use in assembling shoe parts comprising a support for a moccasin plug, and a holddown arranged to clamp the plug against the support, said holddown including a portion of transparent material arranged to engage the marginal portion of a plug on the support and to extend outwardly beyond said marginal portion to determine the heightwise position. of a vamp relatively to the plug in the assembling operation.

2. Apparatus for. use in assembling shoe parts comprising a support for a moccasin plug, and a holddown cooperating with said support to clamp a plug thereagainst, said holddown being substantially larger than said support and arranged to engage the margin of the plug during the assembling operation, said holddown having a transparent portion permitting observation of the work during the assembling operation.

3. Apparatus for use in assembling shoe parts comprising a support for a moccasin plug, a clamp for holding a plug against said support, and a transparent plate extending beyond said clamp and arranged to engage the margin of the plug while providing a surface forming a gage to determine the heightwise position of a vamp re1atively to the plug during the assembling operation.

4. Apparatus for use in assembling shoe parts comprising a support for a moccasin plug, a clamp for holding a plug against said support, said clamp being smaller in area than said support, and a transparent plate associated with said clamp for engaging the margin of the plug while permitting observation of the work during the assembling of a vamp with the plug.

5. Apparatus for use in assembling moccasin plugs and vamps comprising a support having a generally concave supporting surface for a moccasin plug, a clamp having a convex work-engaging portion cooperating with the support to hold a plug thereagainst and to displace the marginal portion upwardly, and means extending laterally beyond said clamp and said support for engaging the upwardly displaced margin of the plug and for gaging the heightwise position of a vamp while it, is being assembled with the plug.

6. Apparatus for use in assembling shoe parts comprising a support having a concave supporting surface, a holddown having an area substantially greater than that of the support and arranged to clamp a moccasin plug against the support, said holddown having .a generally convex central portion arranged to press the plug against the concave surface of the support so that the margin of the plug is forced into contact with the adjacent surface of the holddown which thereby acts as a gage to determine the heightwise position of a vamp relatively to the plug.

7. Apparatus for use in assembling shoe parts comprising a support having a concave supporting surface, a holddown having an area substantially greater than that of the support and arranged to clamp a moccasin plug against the support, said holddown having a generally convex central portion arranged to press the plug against the concave surface of the support so that the margin of the plug is forced into contact with the adjacent surface of the holddown which thereby acts as a gage to determine the heightwise position of a vamp relatively to the plug, that portion of the holddown engaged by the margin of the plug being of transparent material to permit observation of the work by the opera tor in the assembling operation.

8. Apparatus for use in assembl ng moccasin plugs and Vamps comprising a support having a generally concave work-engaging portion, a clamp having a Work-engaging portion complemental in shape to the concave portion of the work support, means urging the clamp and support together to retain a moccasin plug therebetween and to displace the marginal portion upwardly, and a plate secured to the upper surface of the clamp to engage the upwardly displaced marginal portion of the plug and to form a gage to determine the heightwise position of the vamp relatively to the plug, said plate being formed of transparent material to permit observation of the work by the operator during the assembling operation.

ARTHUR M. SIMPSON.

Images