US2664680A - Heel finishing machine - Google Patents

Description

Jan. 5, 1954 RSCHIAVULLI ET AL 2,664,680

HEEL FINSHING MACHINE Filed Dec. 20, 1950 2 Sheets-Sheet l Jan. 5, 1954 R. scHlAvULLl ET Al. 2,664,680

HEEL FINISHING MACHINE Filed DGO. 20, 1950 2 Sheets-Sheet 2 INVENTORS A Fadda/M 'c z'a, ua ,/J /7/2 Za'wo Caf@ ma cc /2 l 0 ATTORNEY Patented `an. 5, 1954 OFFICE HEEL FINISHNG MACHINE Rudolph Schiavulli and Antimo Capomacchio, Providence, R. I.

Application December 20, 1950, Serial No. 201,718

4 Claims.

The present invention relates to shoe manufacturing or rebuilding and more particularly to an improvement in the apparatus for scouring and finishing heels as disclosed in Patent Number 2,021,442 issued to us on November 19, 1935.

One of the principal objects of the present invention is to provide improved apparatus for scouring the heel and bung the heel of a shoe without damaging the upper.

Another object of the invention is to provide apparatus whereby unskilled labor can perform skilled work without damaging the shoe.

Another object of the invention is to provide a guide which will function perfectly even though associated parts, such as a wheel, do not run true.

Still another object of the present invention is to provide a guide ring which will lightly touch the nishing wheel at all times even as wear takes place on the guide ring, stationary guide or wheel and as the wheel runs out or line due to manufacturing errors or wear so that the heel of a shoe may be scoured and buried completely without danger of damaging the upper.

Still another object of the present invention is to provide a lubricating system for a heel scouring and buihng machine.

And still another object of the present invention is to provide a fixture which will permit the rapid, accurate and easy replacement of emery cloth or sand paper on the commercial type of heel scouring and bung machine.

Other objects of the present invention will be apparent in part and pointed out in part in the accompanying specification and claims.

In the prior art including our Patent Number 2,021,442 a guide rigidly fixed adjacent the scouring or buiiing wheel has been customarily employed as a rest for the shoe being worked on. This arrangement has proved unsatisfactory because eniery and bufiing wheels in commercial manufacture are not accurately made within tolerances to prevent the wheel from running out of line. In addition, if they were accurately made, wear would soon cause the wheels to run out of line. The result is that guide plates or guide rings must be placed at a distance away from the side of the wheel. Consequently, shoe heels are not aiiorded the advantage of the guide at the juncture of the heel and the upper. This results in many damaged uppers.

In our Patent #2,021,442 an early improvement in guide rings, no provision was made for wear of the guide ring and the guide ring seat in the stationary guide, so that side thrust and walking took place. Also, the space between the guide ring and the wheel peripheri7 was rigid (no give), so that the point where the heel and upper meet could not be brought in contact with the abrasive wheel and still have the protection of the guide ring.

The present invention embodies means allowing heels to be scoured or buried without dan age to uppers because the new construction allows for give and wear and permits the heel to be brought in close contact with the abrasive wheel with the upper protected by the guide ring.

The machine used in shoe repairing generally have a split wooden cam operated wheel provided with brads. Emery cloth or sand paper is Wrapped around the periphery of the wooden wheel. The ends of the emery cloth or sand paper are pressed over the ends or the brads. In closed position the brads hold the emery cloth or sand paper wedged between the closed sides of the split wheel.

In practice the wooden wheel rotates under the slightest pressure due to the ball bearing construction employed in the high speed shaft. This makes replacement of the abrasive element a tedious and sometimes hazard job because knuckles are skinned in the process,

The present invention provides a fixture which holds the wheel stationary while the abrasive element is replaced.

Like reference characters refer to like parts in the accompanying drawing, in which:

Figure l is a iront elevational view, partly in section, of a conventional heel finishing machine embodying the present invention.

Figure 2 is a side elevational end view of Figure 1.

Figure 3 is a side elevational view of an assembled unit of the machine embodying the resilient elements and the guide plate.

Figure 4 is a side elevational view of the disk holding the guide plate springs.

Figure 5 is a sectional view taken along line 5--5 of Figure 4.

Figure 6 is a side elevational View of a modified form of the xture used to hold the shaft against rotation when the abrasive element is changed.

Figure 7 is a front elevational view of Figure 6.

Referring to Figure 1, a motor i@ mounted on a pedestal I I is provided with a shaft l2 projecting from either end of the motor lo.

Shaft l2 is reduced at i3 to accommodate a bushing I4 which may be held to said shaft i2 in any conventional manner such as a key way or set screw l5. A wooden split cam operated wheel i6, is provided with an abrasive element such as emery cloth or sand paper I1. Metal iianges i8 and i9 are secured on either side of wooden split wheel l5.

The suction hood 2t is of new design embodying the feature of housing the new guide ring i2 and its retaining elements consisting of stationary guide 22 and spring holder plate 21. The suction hood 2i! is attached to the end bell of the motor by means of an Allen head cap screw 24.

Stationary guide 22 is provided with a hub 23 which is held in position in split bearing 25 located in suction hood 25 by means of cap screw 2l.

A stationary guide 22 is also provided with a circular recessed area 25 adapted to accommodate circular spring holder plate 2l. Screws 28 secure plate 27 to guide housing 22. Referring to Figures 1, 4, and 5 circular spring holder plate 2 has four leaf springs 3Q, 3l, 32 and 33 secured to one of its sides by means of rivets 34, 35, 36 and 3?.

Stationary guide 22 is designed with a circular ledge 5&3 and a circular shoulder 13| formed to accommodate guide ring l2 which is free to slide axially under the urging of leaf springs 35, 3 l, 32 and 33 but is limited in its forward movement by face i3 in stationary guide 22.

In operation, as wheel I6 revolves due to its connection to shaft i2, the edge 4d or 45 is free to urge guide ring i2 outwardly but due to leaf springs 3Q, 3 i 52 and 33, guide ring 42 will always be lightly touching wheel i6. As circular shoulder il and circular ledge i5 wear due to the axial and radial movement of guide ring 52, leaf springs 55, 3l, 32 and 33 will take up that Wear and still hold guide ring d2 against shoulder 4l.

There is practically no wear on guide ring 42 where it touches wheel i 5 because the touching is done with very little pressure and because the commercial type of wheel is constructed of wood covered with a layer of felt forming the under surface for the abrasive element of emery cloth or sand paper.

Once adjustment for pressure of guide ring i2 against wheel it is made, through leaf springs 35, 3i, 32 and 33, it lasts indefinitely.

The tip of guide ring i2 under light pressure where it contacts wheel l assists in keeping the abrasive element, emery cloth or sand paper on the wheel by preventing that abrasive element from walking. The close proximity of guide ring i2 to wheel i5 allows the sharp corner of the emery cloth or sand paper to function longer because the soft corner of the emery cloth or sand paper at the edge of wheel i6 is not under pressure. area used in the present embodiment of the guide ring d2.

Any operative may rest a shoe on the face of guide ring 52 assured of uniform contact with abrasive surface l? and assured of protecting the upper behind guide ring 22. The close proximity of guide ring i2 to abrasive surface l1 assures a thorough scouring buiiing and finishing of a shoe heel. There will be no holidays or untouched areas on the heel.

When a heel is pressed against guide ring t2 in a scouring, buing or finishing operation, pressure will cause guide ring d2 to rotate with wheel i5 due to the contact of said guide against the side of said wheel. This action causes the most wear on circular ledge it and circular shoulder Lil.

Shaft l2 is provided with a ball bearing consisting of a bushing 55, balls 5l and race 52. Race The area adjacent the edge is the working 52 is provided with a groove 53 which will permit a lubricant, such as is administered by a Zerk fitting 55 to reach balls 5 i. A felt wash 56 is held in place over the face of the ball bearing by means of a plate 51 secured to race 52 by means of screws not shown. rlhe felt washer prevents the lubricant from running away from the area of ball 5|.

Referring to Figure 1, shaft I2 on its extreme outer end is provided with a retaining nut 5E? shown in the sectional area as taking up the width of the threaded area of shaft i2. Nut Sil when half as wide functions as well as when it is as wide as shown.

A conventional hexagon nut '5l with threads in a direction reverse to the threads in nut 69 is provided to be placed in position when abrasive paper Il is to be replaced on split wooden wheel I5. Nut 5! is provided with a slot 52. A boss G3 is provided on the side of housing 2li. A hole 5 is drilled in boss 63. A pin (not shown) or a ten penny nail may be dropped into hole Eli and lined in the path of slot 52. Shaft l2 will then be held against rotation.

Figures G and 'l show a modified form oi" mechanism or xture to hold shaft i2 against rotation when abrasive paper i7 is to be replaced.

The fixture consists of a disk 'lil provided with a reduced extension il slotted at 72. A dowel pin I3 is secured in disk IS. Slot 'i2 fits over opposite iiat sides of hex nut 55.

Extension il fits inside of guide housing 22. A hole 'Ed located in housing 25 accommodates pin I3. It will be seen that shaft i2 cannot turn when nut 55 is collared by slot 'E2 and pin l5 is in hole 'M What we claim is:

l. In a shoe heel finishing machine, a rotatable shaft having a wheel fixed thereto, a suction hood surrounding a portion of said shaft with respect to which the said portion of the sliait is free to rotate a stationary guide adjacent a radial side of the wheel, a shoulder' on said stationary guide adjacent the wheel, a guide ring mounted on said stationary guide for axial movement thereon and means for resiliently retaining said guide ring in engagement with the said shoulder which comprises a spring holder plate xed to said stationary guide and a plurality of spaced spring means carried thereby and in contact with said guide ring.

2. In a shoe heel nishing machine, a rotatable shaft having a Wheel xed thereto, a stationary guard member surrounding a portion oi said shaft with respect to which the said portion of the shaft is free to rotate, a guide ring mounted on said stationary guard for limited axial movement thereon, a spring holding ring provided with springs secured to said stationary guard, said springs pressing said guide ring against a shoulder of said stationary guard.

3. In a shoe heel nishing machine, a rotatable shaft having wheels xed thereto, suction hoods surrounding a portion of said shaft with respect to which, the said portion of the shaft is f to rotate, stationary guards supported solely in said suction hoods, spring holding rings provided with springs secured to said stationary guards, guide rings freely mountedl on said stationary guards for limited axial movement between said wheels and said springs, said springs pressing said guide rings against shoulders on said stationary guards.

4. In a shoe heel nishing machine, a rotatable shaft having a wheel xed thereto, a stationary no vv guard member surrounding a portion of said shaft with respect to which, the said portion of said shaft is free to rotate, a guide ring mounted on said stationary guard for limited axial movement thereon, a spring holding ring provided with springs secured to said stationary guard, said springs pressing said guide ring against a shoulder of said stationary guard, said rotatable shaft having a threaded end, a suction hood secured to said stationary guard member partly surrounding said wheel, a projection on the side of said hood opposite the threaded end, a castilated nut engaging said threaded end for rotation in a direction opposite to the direction of normal rotation of said shaft, said projection having a perforation in alignment with the castilations in said castilated nut and a pin removably positioned in said perforation and extending into said castilations to prevent rotation of said rotatable shaft.

RUDOLPH SCHIAVULLI. ANTIMO CAPOMACCHIO.

References Cited in the file of this patent UNITED STATES PATENTS

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