US2116627A - Machine for slotting heels - Google Patents

Description

May 10, 1938. G; HAZELTON MACHINE FOR SLOTTING HEELS Filed Jan. 9, 1956 2 Sheets-Sheet l May 10, 1938. G. HAZELTON MACHINE FOR SLOTTING HEELS 2 Sheets-Sheet 2 Filed Jan. 9, 1956 Patented May 10, 1938 UNITED STATES PATENT oFFicE MACHINE FOR SLO-TTING HEELS Application January 9, 1936, Serial No. 58,327 In Great Britain March 23, 1935 10 Claims.

This invention relates to the manufacture of shoes and is illustrated herein as embodied in a machine for forming slots in the breasts of heels.

In United States Letters Patent No. 2,046,454, granted July '7, 1936 on an application filed in the names of Hazelton, James and Bacon, there is disclosed a machine for forming in the breast of a pre-finished Cuban heel made up of a plurality of lifts, a slot which is V-shaped in cross section and extends transversely of the breast of the heel adjacent to the attaching face of the heel, the slot being of suitable size to receive the rear end of the short outsole of the shoe to which the heel is later to be attached. A shoe comprising the above-mentioned heel and outsole is disclosed in detail in United States Letters Patent No. 2,027,431, granted January 14, 1936 on an application filed in the names of I-Iazelton, James and Bacon.

There is a tendency for the heel to move rapidly against the slot-forming cutter of the above machine with the result that the heel material adjacent to the slot is sometimes scorched or burned. The feeding of the heel too rapidly against the cutter is partly due to the tendency of the cutter to draw the work but is largely the result of the natural desire on the part of the operator who manually controls the movement of the heel, to hasten the operation.

In order to control the speed of presentation of the heel to the cutter and in accordance with a feature of this invention, there is provided a machine comprising a cutter, a carrier for a shoe part such, for example, as a heel, manually operated means for moving the carrier, and mechanically operated means for enabling the carrier to be moved toward the cutter by the manually operated means at a predetermined speed. In the illustrated machine, movement of the heel which is positioned upon the carrier, toward the cutter to form a slot such as above described, may be stopped at any stage of the operation, but the speed of the carrier and therefore the speed of the heel toward the cutter cannot be varied. The speed at which the carrier can be moved is so chosen that the movement of the heel toward the cutter is sufficiently slow to insure. that the heel shall not be scorched and that a well-defined slot is formed in the heel.

The invention will be better understood and appreciated after reading the following description in connection with the accompanying drawings, in which Fig. 1 is a side view of the illustrated machine, parts of which have been broken away;

Fig. 2 is an enlarged plan View of the work carrier of the machine;

Fig. 3 is a detail front view of the lower end of a post which supports the work carrier;

Fig. 4 is a sectional view taken along line IV-IV of Fig. 3;

Fig. 5 is a detail sectional view taken along line V-V of Fig. 2; and

Fig. 6 is a perspective view of a heel the breast of which has been slotted by the use of the above machine.

The illustrated machine is described with reference to forming a slot 20 (Fig. 6) in the breast of a pre-finished Cuban heel 22 comprising a plurality of lifts 24. The slot 22 is V-shaped in cross section and is formed and arranged to receive the rear end of a short outsole (not shown).

The machine comprises a rotary barrel cutter or saw 26 (Fig. 1) which is mounted upon a shaft 28 and has a plurality of elongated cutting teeth 30, a carrier 32 for supporting the heel 22, and mechanism for moving the heel against the cutter after it has been positioned upon and clamped to the carrier, thereby forming the slot 20 in the breast of the heel.

The carrier 32 comprises a Work plate 34 (Fig. 5) and a slide 38 which is secured by screws 36 to the work plate and which is mounted for movement along an undercut slideway 40 of a guide plate 42. The heel is positioned widthwise and lengthwise upon the carrier 32 by a pair of gages 44 (Fig. 2) adjustable along slideways 46 of the carrier upon turning a screw 48 which is rotatably mounted upon the carrier. Right-hand and lef hand threaded portions 50', 52 of the screw 48 are in threaded engagement with the respective gages 44, and when the screw is turned the gages are moved equal distances toward and away from a central plane 54 of the carrier 32.

In order to insure that the heel 22 shall be stably supported upon the carrier 32, a plate 56 having a convex heel-engaging face 58 is secured to the carrier by a screw 60 (Fig. 2). The gages 44 comprise upwardly extending arms 62 (Fig. l) which are provided with abutments 64 (Fig. 2) formed to engage opposite sides of the heel 22 for positioning the same widthwise upon the carrier 32, the arms 62 also being provided with stops 66 against which the breast of the heel is forced to position the heel lengthwise upon the carrier. Since the heel 22 is tapered the abutments 6 1 tend to force the heel against the plate 56 as they are pressed against the sides of the heel.

In order to force the heel against the stops 66 there is provided a clamp 68 which is pivotally mounted upon trunnions I0 (Fig. ,1) extending from an upstanding boss I2 of the carrier 32. The clamp 68 comprises a pad I4 pivotally mounted upon the forward end of a rod I6 which is adjustably secured through the provision of a set screw 18, within a bore of a housing to which an upstanding handle 82 is attached. A spring 84 (Fig. 2) is provided to force the heel-engaging pad I4 against the forward portion of the rod I6 thereby insuring that the pad shall not turn upon the rod under its own weight when the clamp 68 is raised to an inoperative position. The clamp 74 is forced against the heel by a spring 86 (Fig. 1) the upper and lower ends of which are secured to the housing 80 and to the guide plate 42, respectively. The trunnions ID are so positioned with relation to the spring 88 that when the rear end of the housing 88 is swung against a projecting lug 88 of the carrier 32, the spring 86 is moved to a, horizontal position and retains the housing in engagement with the lug 88.

The carrier 32 has a depending extension (Figs. 1 and 5) which extends through a slot 9i (Figs. 2 and 5) in the guide plate 42 and is provided with a recess 92 constructed and arranged to receive the non-threaded shank of a lead screw 94 which is in threaded relation with a thrust collar 96 (Fig. 1) secured within a post 98. The guide plate 42 is secured to the upper end of the post 98 and is also rigidly connected to the post by a pair of braces I00.

The carrier 32 is operated by a hand lever I02 which is fulcrumed upon a stud I04 secured to the guide plate 42 and which has an elongated slot I06 (Figs. 2 and 5) shaped to receive a pin I08 secured to the carrier 32. The handle III) of the lever I02 may be manually moved back to its starting position but is usually swung toward the operator after the slot 20 has been formed in the heel 22 under the action of a spring II2. One end of the spring H2 is attached to an extension II4 of the lever I02 and the other end of the spring is secured to a rod II6 attached to the guide plate 42. The carrier 32 is moved toward the cutter 26 by swinging the lever I02 rearwardly, that is, toward the cutter 26, and is moved away from the cutter through the above-described mechanism. Movement of the carier 32 toward the cutter 26 is limited by engagement of a stop screw I I8 which is in threaded relation with the lug 88 of the carrier, against a shoulder I 20 of the guide plate 42. Movement of the carrier 32 away from the cutter 26 is limited by engagement of the depending extension 90 of the carrier with the rear end I22 (Fig. 2) of the slot 9I.

The speed of presentation of the work to the cutter 26 is limited by mechanism which will now be described. A pair of pulleys I24, I26 (Fig. 1) are loosely mounted upon the lead screw 94 at the opposite sides of the depending extension 90 of the carrier 32. The pulleys I24 and I26 are continuously operated by belts I28, I30, respectively, which are driven by pulleys I32, I34, respectively, keyed to a drive shaft I36. Clutch disks I38, I40 positioned adjacent to the pulleys I24 and I26, respectively, are pinned to the lead screw 94. It will be noted that the belt I28 is crossed and the pulley I32 is relatively small in order that the pulley I24 may be rotated at a low speed in a counterclockwise direction, as viewed from the front of the machine. The belt I30 is open and engages a large pulley I34 in order to drive the pulley I26 at a relatively high speed in a counterclockwise direction. The lead screw 94 is normally stationary since neither of the pulleys I24,

I26 is forced against its corresponding clutch disk.

When the operator swings the lever I02 toward the cutter 26 the depending extension 90 of the carrier 32 forces the pulley I24 against the clutch disk I38 thereby causing the lead screw 94 to rotate in a clockwise direction as viewed from the left in Fig. 1. As the lead screw 94 rotates it moves in the direction of its axis of rotation toward the cutter 26 at a predetermined speed depending upon the pitch of the thread of the lead screw and upon the speed of rotation of the drive shaft I36. After the stop screw II8 (Fig. 1) has engaged the shoulder I20 of the guide plate 42, the pulley I24 ceases to press against the clutch disk I38 thereby causing the lead screw 94 to come to rest.

It is customary, as above stated, for the operator to remove his hand from the lever I02 after the slot 20 has been formed thereby causing the lever to return to its starting position under the action of the spring II2. Movement of the lever I02 away from the cutter 26 causes the depending extension 90 of the carrier 32 to force the pulley I26 against the clutch disk I40 thereby causing the lead screw 94 to rotate rapidly in a clockwise direction and thereby permitting the carrier 32 to return quickly to its starting position. As above stated, movement of the carrier 32 away from the cutter 26 is limited by engagement of the depending extension 90 with the forward end I22 (Fig. 2) of the opening 9I formed in the guide plate 42.

It is desirable that the mechanism supported by the post 98 be swung to one side preparatory to removing the cutter 26 from the shaft 28. Accordingly, the post 98 has a bracket I42 secured to its lower end, the bracket being mounted upon a bearing I44 supported by a slide I46. The slide I46 may be adjusted to different heightwise positions along a guideway I48 formed in a frame I50 secured to a column I52, by turning a set screw I54 which is rotatably mounted in the frame I50 and is in threaded engagement with the slide I46. The post 98 is held in the upright position shown in Figs. 1 and 2 by a pin I56 secured to the slide I 46 and constructed and arranged to engage within an arcuate recess I58 (Fig. 3) formed in the post 98. The pin I56 is clamped against the bottom of the arcuate recess I58 to retain the post 98 in an upright position, through the provision of a screw I60 which is in threaded engagement with an angle arm I62 (Fig. 4) pivotally connected to a collar I64 mounted upon the "pin. When it is desired to swing the post 98 about the bearing I44 preparatory to removing the cutter 32 from the machine, the screw I60 is loosened and the post 98 is swung in a clockwise direction (Fig. 3) after the angle arm I62 has been pushed rearwardly out of the path of movement of the post 98.

The cutter shaft 28 is mounted in bearings I66 housed within the upper end of the column I52 and is rotated by a pulley I68 which is keyed to the shaft and is operated by a belt I10.

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

1. A machine for operating upon shoe parts having, in combination, a cutter, a carrier for a shoe part, manually operated means for moving the carrier, and mechanically operated means for enabling the carrier to be moved toward the cutter by said manually operated means at a predetermined speed.

2. A slotting machine having, in combination,

a cutter, a carrier for a heel, means for positioning the heel upon the carrier, manually operated means for moving the carrier, and mechanically operate-d means for enabling the carrier to be moved toward the cutter by said manually operated means at a predetermined speed to form a slot in the heel.

3. A slotting machine having, in combination, a cutter, a carrier for a heel, means for positioning the heel upon the carrier, manually operated means for moving the carrier toward the cutter, and mechanically operated means for limiting the speed of the carrier moved toward the cutter by said manually operated means, the operation of the means for limiting the speed of the car- 'rier being dependent upon the operation of the manually operated means.

4. A slotting machine having, in combination, a rotary saw, a carrier for a heel, means for positioning the heel upon the carrier and for securing the heel to the carrier, manually operated means for moving the carrier toward and away from the saw, and mechanism rendered operative by said manually operated means for permitting the carrier to be fed at a relatively low speed toward the saw and at a relatively high speed away from the saw.

5. A slotting machine having, in combination, a rotary saw, a carrier for a heel, means for positioning the heel upon the carrier and for securing the heel to the carrier, manually operated means for moving the carrier toward the, saw to form a slot in the heel, and mechanism rendered operative by said means for limiting the rate of feed of the carrier to insure the formation of a properly formed slot in the heel.

6. A slotting machine having, in combination, a rotary saw, a carrier for a heel, means for positioning the heel upon the carrier and for securing the heel to the carrier, a lead screw movable lengthwise of its axis, a driven pulley loosely mounted upon said screw, a clutch disk secured to said screw, and manually controlled means for causing the carrier to force the pulley against the disk thereby causing the screw to move toward the saw and to regulate the speed of the heel upon the carrier toward the saw.

7. A slotting machine having, in combination, a rotary cutter, a carrier having an extension, means for positioning a heel upon the carrier and for securing the heel to the carrier, an internally threaded thrust collar, a lead screw in threaded engagement with the collar and having its axis of rotation arranged at a substantial angle to the plane of rotation of the cutter, a pulley loosely mounted upon the lead screw and positioned adjacent to the extension of the carrier, means for driving the pulley, a clutch member secured to the lead screw, and a lever for moving the carrier lengthwise of the lead screw to cause the extension of the carrier to force the pulley against the clutch member thereby moving the screw lengthwise. of its axis and permitting the carriage to be fed at a predetermined rate toward the cutter.

8. A slotting machine having, in combination, a rotary saw, a carrier having an extension, means for positioning a heel upon the carrier and for securing the heel to the carrier, an internally threaded thrust collar, a rotatable lead screw in threaded engagement with the collar and having its axis of rotation arranged at a right angle to the plane of rotation of the saw, a pair of spaced pulleys loosely mounted upon the lead screw and positioned at opposite sides of the extension of the carrier, means for driving the pulleys in opposite directions upon the lead screw, a pair of clutch members secured to the lead screw adjacent to the respective pulleys, a lever for moving the carrier in the direction of the axis of rotation of the lead screw to cause the extension of the carrier selectively to force one of the pulleys against an adjacent clutch member thereby causing the clutch member to move lengthwise of said axis with the lead screw and permitting the carriage to be fed by said lever at a speed equal to the speed of the screw in the direction of its axis of rotation.

9. A slotting machine having, in combination, a rotary barrel saw, a carrier having an extension, means for positioning a heel upon the carrier and for securing the heel to the carrier, an internally threaded thrust collar, a lead screw in threaded engagement with said collar and having its axis of rotation arranged at a substantial angle to the plane of rotation of the saw, a pulley loosely mounted upon the lead screw and positioned adjacent to the extension of the carrier, means for driving the pulley, a clutch member secured to the lead screw, a lever for moving the carrier in the direction of the axis of rotation of the lead screw to cause the extension of the carrier to force the pulley against the clutch member thereby causing the screw to move along said axis and permitting the carriage to be fed at a predetermined speed toward the cutter, and a frame upon which the carrier and the thrust collar are supported, said frame being mounted for swinging movement to permit the cutter to be removed from the machine.

10. A machine for operating upon shoe parts having, in combination, a cutter, a carrier for a shoe part, manually operated means for effecting relative movement between the carrier and the cutter to cause the. cutter progressively to operate upon the shoe part, and mechanically operated means rendered operative by said manually operated means for controlling the rate of said relative movement between the carrier and the cutter.

GEORGE I-IAZELTON.

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