US2292936A - Pounding machine - Google Patents

Description

Aug. 11, 1942- J. GCULDBOURN PQUNDING MACHINE Fil ed Jan. 15, 1942 2 Sheets-Sheet l J. GOULDBOURN POUNDING MACHINE Aug. 11.1942.

2 Sheets-Sheet 2 Filed Jan. 15, 1.942

Patented Aug. 11, 1942 POUNDING MACHINE Joseph Gouldbourn,

Leicester, England, assignor.

to United Shoe Machinery Corporation, Flemington, N. J a corporation of New Jersey Application January 15, 1942, Serial No. 426,807 In Great Britain August 17, 1940 3 Claims.

This invention relates to pounding machines, and is herein illustrated as embodied in a pounding roll adapted for use in pounding shoe bottoms.

In the manufacture of shoes, it has long been customary to subject the bottoms of shoes, particularly McKay shoes, to a pounding or beating operation for the purpose of smoothing down the puckered edge portions of the overlasted upper materials. One machine, which has been used for this purpose, is of the type disclosed in United States Letters Patent No. 1,426,372 granted August 22, 1922, upon application filed in the name of Cyrus D. Foye. Machines of this type have been satisfactory for most purposes in connection with the pounding of shoe bottoms. However, some difficulty has been experienced in utilizing such machines in pounding the shank portions of a shoe because of the fact that the contour of the work-engaging portions of the pounding roll is such that the tool cannot readily be brought to bear upon the steeply curved portions of the shank. This is particularly true when the operations are performed upon high arched shoes.

In View of the foregoing, it is an object of the present invention to provide a pounding roll which will be particularly effective in operating upon the curved shank portions of shoes, and which at the same time can be used to operate upon the flat portions of shoes, such as the foreparts thereof.

To this end and as illustrated, I have provided a pounding roll, in which there are a plurality of rods carrying pounding rings loosely mounted thereon, so arranged that during the beating operation the rings present curved work-engaging surfaces, which can be brought to bear with substantially uniform pressure upon the curved portions of the work. Preferably and as shown, the rods are curved outwardly to correspond roughly to the curvature of the shank portion of a shoe, or they are partly straight and partly curved, so that the resulting beating surfaces are especially adapted for use either upon straight or curved portions of the work.

These and other features of the inventionv are disclosed in the following specification and in the accompanying drawings, and are pointed out in the claims.

In the drawings:

Fig. l is a crosssectional View of a portion of a pounding roll constructed in accordance with the invention;

Figs. 2 and 3 are cross sectional views of por- CFI tions of pounding rolls, similar to that of Fig. 1,

but having different forms of beating members; Fig. 4 is an end view, partly in section, of a portion of another form of pounding roll; and

Fig. 5 is a cross sectional view of the pounding roll shown in Fig. 4.

The preferred form of pounding roll, which is shown in Fig. 1, comprises a hub III, keyed to a shaft I2 and having annular flanges I4, secured to the hub by bolts I6, and carrying along their peripheries a plurality of rods, one of which is indicated by reference character I8, upon which are loosely mounted beating rings 20. Each of the rods I8 is curved outwardly relatively to the axis of the hub, and is secured against rotation in the flanges I4 by a suitable key 22. Preferably, the rings are circular in cross section and are positioned in a plurality of closely adjacent circumferential grooves 24 in the rods I8, which are of a somewhat smaller diameter than the internal diameter of the rings. The grooves are complementary in shape to the rings, and serve to hold the rings against movement along the rods. This construction is such that upon rotation of the roll in the direction of the arrow 26, the rings are thrown outwardly by centrifugal force, forming a curved barrel-shaped beating surface corresponding roughly to the shank portion of a shoe bottom, such as that indicated by dot and dash lines 28, but yieldable inwardly so that the work contacting portions of the rings can closely conform to the variations in curvature of the shoe. It is to be noted that, since the rings are constrained in their outward movement by engagement of the inwardly disposed portions of the bottoms of the grooves in which they are positioned, the force of the pounding operation will be exerted substantially equally along the shank portion of the shoe.

In order to prevent formation of ridges by having successive series of rings strike the same portion of the shoe in the same direction, the rings are staggered in adjacent units by means of collars 30, whichare alternately positioned upon the rods I8 adjacent to first one and then the other of the flanges I4.

Instead of having the rods I8 curved to cause the roll to present a uniformly barrel-shaped work-engaging contour, as shown in Fig. 1, they may be arranged, as shown in Fig. 2, so that only one-half of each rod is outwardly curved, as shown at 32, and the other half is straight in the direction of the axis of the roll, as shown at 34. By this arrangement the pounding roll will have a curved work-engaging portion especially adapted for operating upon the shank portions of shoes, and a straight or flat portion suitable for operating upon the forepart portions of shoes. The modified form of the invention shown in Fig. 3 is similar to that shown in Fig. 1, except that a number of centrally located rings 36, preferably five, are of the same diameter, and are ground flat, as at 38, these rings being of slightly less diameter than the rings extending along the curved portions of the rod [8. This construction facilitates operation upon the comparatively flat portions of shoe bottoms.

The modified form of the invention illustrated in Figs. 4 and 5 comprises a hub 40, keyed to a shaft 42. At the left-hand portion of the hub, there is an annular flange plate 44 secured by a key 46. At its right-hand end portion the hub is provided with a projecting rib 48 against which a series of plates 5!! are clamped by means of a collar 52, secured to the shaft 42 by a set screw (not shown). The plates 50 form an annular flange member corresponding to the flange plate 44. Additional support is afforded to each of the plates by bolts 54, which pass through the flange plate 44 and are threaded into the plates 50 and secured in position by lock nuts 58.

To aline the bolt-receiving holes in each of the plates 50 with similar holes in the flange plate 4d, one of the plates 56 is provided with a small hole 51 adapted to receive a positioning pin 58 located in the rib 48 of the hub. Thus, this particular plate will serve as a locating means for the remaining plates of the series.

Each of the plates 50 is recessed to receive one end of a supporting rod 60, the other end of each rod being similarly housed in the flange plate 44. Each of the rods carries a series of ten beating rings 62 and 64, which have an internal diameter somewhat greater than that of the rods. The four central rings 64 are of the same diameter and thickness and are approximately cylindrical in shape, and the outer rings 62 are conoidal in shape and are of different sizes. The outer rings progressively decrease in diameter and increase in thickness, the relative diameters and thicknesses being selected so that the weights of all the rings are substantially the same. To avoid the formation of ridges caused by edge portions of the rings in adjacent units, the thickness of the outermost rings of adjacent units is varied, with the result that the rings of adjacent units are staggered.

By providing pounding rings of substantially equal weights, the centrifugal forces exerted by the individual rings will be substantially equal. The construction comprising the series of plates 50 forming an end plate in which the ring-supporting rods 6!] are held, facilitates the withdrawal of any one of the rods without disturbing the remainder, in the event it is desired to replace broken or worn rings.

In the operation of the pounding roll shown in Fig. 1, the forepart portion of the bottom of a lasted shoe is pressed against the pounding roll with its toe end pointing upwardly against the direction of rotation of the roll, and the shoe is advanced across the face of the roll, the action of the beating rings 20 being such as to beat down and flatten out any uneven portions which may have been formed in the overlasted margin of the upper during the lasting operation. Thereafter, the operator first presses one side of the shank portion of the shoe against the roll and, by holding the shoe with its general longitudinal axis extending parallelto the axis of the shaft l2 effects a beating and wiping action upon the overlasted margin along one side of the shank. The shoe is then turned through and the operation repeated upon the other side of the shoe. Because of the curvature of the rods l8, the beating surfaces of the rings 28 will readily accommodate themselves to the contour of the shoe at the shank without exerting excessive pressure at any one portion thereof, which might tend to leave an uneven surface.

The pounding rolls shown in Figs. 2, 3, 4 and 5 are operated in a similar manner, except that in pounding the forepart portions of a shoe the straight portions of the work-engaging surfaces of the rings are used, whereas in pounding the shank portions of the shoes the curved workengaging portions of the rolls are used.

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

1. An upper pounding machine comprising a rotary shaft, a hub carried thereby, spaced supporting means carried by the hub at different distances from the axis thereof, rods mounted in said supporting means and having straight portions in line with one portion of the supporting means and curved portions extending to the other supporting means, and a plurality of rings mounted on said rods.

2. A pounding roll comprising a hub, a rod carried by the hub and extending along the axis thereof, the rod being curved outwardly of the hub and having a plurality of circumferential grooves, and beating rings loosely mounted in the grooves.

3. A pounding roll comprising a hub, a rod carried by the hub and extending along the axis thereof, said rod having a substantially straight portion and an outwardly curved portion and also having a plurality of grooves extending circumferentially of the rod adjacent to each other, and a plurality of beating rings loosely mounted in the grooves.

JOSEPH GOULDBOURN.

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