US2063193A - Machine for shaping uppers over lasts - Google Patents

Description

Dec. 8, 1936. c. F. PYM

MACHINE FOR SHAPING UPPERS OVER LASTS Filed Aug. 2, 1935 5 Sheets-Sheet l Dec. 8, 1936. Q E PYM 2,063,193

MACHINE FOR SHAPING UPPERS OVER 'LASTS Filed Aug. 2, 1935 3 Sheets-Sheet 5 v f K l/ I tip/1.

Patented Dec. 8, 1936 UNITED STATESv PATENT OFFICE MACHINE FOR SHAPING UPPERS OVER LASTS tion, Paterson, N. J.,

Jersey a corporation of New Application August 2, 1935, Serial No. 34,413

18 Claims.

This invention relates to machines for shaping uppers over lasts and is herein illustrated in its application to a lasting machine having means for drawing an upper over a last successively in different locations along the margin of the shoe bottom and means for fastening the overlasting margin of the upper to an insole having a plane bottom face. It is to be understood, however, that the invention in its broadest aspects is not limited toa machine of the particular type illustrated.

An object of the invention is to provide, in a machine for shaping uppers over lasts, means for moving the work relatively to devices for engaging and holding the overlasting margin thereby to draw the overlasted'margin inwardly over the insole, thus obviating the requirement of a complicated gripper mechanism for pulling the upper over the last, as provided in machines of this sort heretofore employed. With the above object in view, the present invention, in one aspect thereof, provides means, herein illustrated as grippers, for engaging and holding in a fixed position a portion of the overlasting margin of an upper on its last and means for effecting movement of the work relatively to said holding means, herein illustrated as a thrust member, whereby the portion of the overlasting margin engaged by the grippers is lasted inwardly over an insole on the last bottom; In the illustrated machine the-thrust member is manually operated in time relation to the closing of the grippers on the overlasting margin, the closing of the grippers and the operation of the thrust member preferably being effected by a common actuating a means.

These and other features of the invention will now be described with reference to the accompanying drawings and will be pointed out in the appended claims.

In the drawings,

Fig. 1 is a side elevation of the complete machine;

Fig. 2 is a side elevation illustrating the lasting devices, the top and bottom of the machine being broken away and parts of the frame being broken away to illustrate underlying parts;

Fig. 3 is a perspective view of the lasting devices illustrated in Fig. 2 showing the grippers in their closed position;

Fig. 4 is a side elevation similar to Fig. 2 showing also a cross section of a last and upper being operated upon;

Fig. 5 is a perspective view showing the fore- 55' part of a shoe and showing the lasting devices in the same position in which they appear in Fig.4; and

Fig. 6 is a fragmental view showing the lasting devices and the work as they appear in Fig. 4 and illustrating particularly the tack driving op- 5- eration.

In the illustrated machine there is incorpo rated tacking mechanism of a well-known commercial type disclosed in Letters Patent of the United States No. 1,106,393, granted August 11, 10 1914, on an application filed in the name of Fred L. MacKenzie, and this machine has a base l0 (Fig. 1) and a head I2 in which is journaled a cam shaft [4 on which there is secured a pulley l6 having suitable belt connections with a motor mounted upon the base In. In the forward part of the head i2 there is mounted a tack driver comprising a bar l8 and a pin extending downwardly from the bar and arranged to drive a tack through a suitable opening in a nozzle 22 to which tacks are automatically delivered through a raceway 24. A one-revolution clutch mechanism is arranged to connect the cam shaft I4 to the motor and to disconnect the cam shaft therefrom after one tack has been driven. The 25 clutch is operated by a knee lever 26 which is pivotally mounted between lugs 28 and 30 projecting forwardly from the base In. The details of the tack driving mechanism are not further described as they are well known in the art. 0

Referring now to Fig. 2, the illustrated lasting grippers comprise a stationary gripper jaw 32 formed in the rear face of the tack nozzle 22, the gripping surface extending rearwardly and upwardly at an angle of approximately 45 to the 35 horizontal, and a movable gripper jaw 34 arranged in opposition to the stationary gripper jaw 32, said movable jaw 34 being formed at the forward extremity of a bell crank lever 36 pivotally mounted between the upper ends of a pair of arms 38 (Fig. 3) extending generally heightwise of the machine. At their lower ends the arms 38 are connected by an integral cross head 40 which is supported upon a cross pin 42 mounted in ears 44 projecting forwardly from a bracket 46 secured to the front of the base [0. The ears '44 also serve to position the cross head 40 and the arms 38 extending upwardly therefrom widthwise of the machine and thus to maintain alinement of the movable gripper jaw 34 with the stationary gripper jaw 32. In order to determine and to maintain a suitable spacing of the gripper jaws 32 and 34 from each other in their open position, as illustrated in Fig. 2, a horizontal arm 48 is formed integrally with the cross head 4|] and arranged to extend rearwardly therefrom through an opening in the base in, the rearward end of said arm being held from movement heightwise of the base by a plate 58 extending heightwise of the base and secured thereto by a clamping screw 52, the upper end of said plate being slotted for the reception of the arm 48.

For moving the work horizontally forwardly of the machine in order to tension that portion 'of the upper held by the grippers over an insole on the last bottom a thrust member or bar 54 is slidably mounted in a guideway in the head i2 extending from front to back of the head, the forward end of said bar extending downwardly at right angles to the body portion of the bar to provide a shoe-engaging member, the shoe-engaging face of which, as illustrated in Fig. 3, is somewhat rounded widthwise thereof in order to permit movement of the shoe relatively to the thrust bar after said member has been advanced to tension the upper over. the shoe bottom. The thrust bar is normally held at the limit of its movement forwardly of the machine by a spring 56 one end of which is connected to the back of the head I2 while the other end is connected to the rearward extremity of the thrust bar, the forward movement of the bar by the spring 56 being limited by a stop 58, herein illustrated as a headed pin or plunger, mounted in a bore in a cross head 60 secured to the thrust bar 54, as'pring 62 being interposed between the head of the plunger and the base of the bore. In order to provide clearance for the movements of the thrust bar 54 forwardly and rearwardly of the machine head the bell crank lever 36, as illustrated in Fig. 3, is divided into two parallel arms beginning at the rearward extremity of the horizontal portion of said lever and extending downwardly therefrom.

For first closing the grippers and thereafter advancing the thrust bar to move the work relatively to the grippers a treadle 64 (Fig. 1) is pivotally mounted at the base of the machine and connected by means of an adjustable link 66 to the forward end of a lever or yoke 68, said lever having centrally disposed downwardly extending ears 10 which are pivotally mounted between the upper extremities of the bracket 46. For advancing the thrust bar 54 a yoke 72 is pivoted between the upper extremities of the bracket 46 coaxially with the yoke 68, said yoke 12 being provided with a head 14 (Fig-3) to which there is pivoted a dog 16 arranged to extend forwardly from the head 72, said dog having formed at its forward extremity a detent 13 constructed and arranged to engage suitable ratchet teeth formed in the under surface of the body portion of the thrust bar 5% adjacent to its workengaging portion. The operating connections between the treadle-actuated lever or yoke 68 and the bell crank lever 35 carrying the movable gripper jaw 34 comprise a link 88 (Fig. 2) the forward end of which is pivoted to a block 82 pivotally mounted between the lower ends of the downwardly extending arms of the bell crank lever 36, the rearward extremity of said link being'pivoted to another block 84 which, in turn, is pivoted between the ends of the yoke 68. The pivot blocks 82 and 84 areyieldingly urged away from each other by a compression spring 88 coiledabout the link and positioned between said pivot blocks, the extent of separation of the pivot blocks from each other being determined by the distance between the head 86 of the link SE! and the stop nut 81 mounted thereon. The extent of separation of said pivot blocks determines the timing of the advancement of the thrust member 54 with relation to the closing of the gripper jaws 32, 34. For swinging the dog it in a clockwise direction as seen in Fig. 2 in order to bring the detent 18 into engagement with one of the ratchet teeth in the thrust bar 54 a yoke 90 is pivotally mounted on an upwardly extending ear 92 of the pivot block 84 and a headed pin 94 is slidably mounted in a hole in the cross bar of the yoke 90, the upper end of said pin being provided with 'a head 96 which is pivoted to the dog 76. A spring 98 coiled about the pin 94 and interposed between the head 95 of said pin and the yoke 90 provides a yielding connection between said yoke and the dog it. For advancing the yoke 72 in order to move the thrust bar forwardly of the machine the cross pin I00 on which the pivot block 84 is mounted is extended in opposite directions from the yoke 68 and provided with suitable collars I02 for engagement within recesses Hi4 provided in the arms of the yoke 12. When the machine is at rest the collars H32 are spaced from the yoke 12 as illustrated in Fig. 2 and the detent i8 is disengaged from the thrust bar 54. During the first stage of the depression of the treadle 64 the yoke 68 moves into engagement with the yoke '32, and, at the same time, moves the detent 78 into engagement with a ratchet tooth in the thrust bar 54, and also advances the movable grippertd toward the stationary gripper 32 in order to engage and grip the work before the advancement of the thrust bar 54 commences. The advancement of the thrust bar 54 may be timed with relation tothe closing of the grippers by adjusting the stop nut 81 at the rear end of the link 80 in order to vary the position of the pivot block 84 lengthwise of said link. It will be noted, however, that the adjustment of the stop nut 31 does not vary the timing of the engagement of the detent 18 with the thrust bar 54 with relation to the advancement of the yoke 68 since said yoke and the operating connections to the dog '16 are both pivoted to the block 84 and therefore any adjustment of the block 84 endwise of the link 80 afliects the yoke 68 and the detent '18 to the same extent. This construction permits the actuation of the grippers to be varied for diiferent kinds of work while still maintaining the desired timing of the actuation of the detent relatively o he'advancement of the yoke 12 on which the detent is pivoted.

For returning the yoke 68 and the parts associated therewith to their initial positions at the end of the machine cycle a spring M5 is coiled about the link 553 and positioned between a collar I08 secured to said link and a cup H0 supported upon a bracket H2 extending forwardly from the bracket 46, upward movement of the link 66 by said spring being limited by the engagement of a collar I I4 secured to said link with the bottom of the bracket I l 2.

In lasting shoes in the illustrated machine a shoe to be operated upon is presented in inverted position to the illustrated grippers, the overlasting margin I !6 (Fig. 4) being positioned between the gripper jaws, the thrust bar 54 being moved rearwardly sufiiciently to permit the overlasting margin to be presented to the grippers. In order to provide sufficient space rearwardly of the grippers for large shoes the upper portions of the arms 38 are oifset rearwardly of the machine. After positioning the shoe, the opera ator depresses the treadle 64 thereby swinging the yoke 68 in a counterclockwise direction, as seen in Fig. 4. During that portion of the movement of the yoke 68 which occurs before the collars I02 engage the yoke 12 the bell crank lever 36 is swung in a clockwise direction, as seen in Fig. 4, thereby closing the gripper jaws on the overlasting margin H6 and at the same time bringing the detent 78 into engagement with one of the ratchet teeth in the thrust bar 54. Continued movement of the yoke 68 after the collars I02 engage the yoke 12 advances said yoke 12 thereby moving the thrust bar 54 forwardly of the machine and moving the work relatively to the grippers and thereby tensioning the upper I20 over the last I22 and drawing the overlasting margin of the upper over an insole I24 on the last bottom. During the advancement of the yoke 12 the spring 88 is compressed, thereby increasing the gripping action of the grippers 32 and 34 and the spring 98 is compressed, thus insuring a firm engagement of the detent 18 with a ratchet tooth in the thrust bar 54. The extent of the tensioning of the upper over the last is controlled by the operator and it will be seen that the knee lever 26 is operable at any stage of the depression of the treadle 64 in order to set in motion the tack driving mechanism thereby to secure the upper in the lasted position determined by the operator while the grippers hold the upper in said position without loss of any of the tension which the operator has exerted upon it.

If it is desired to drive two tacks to hold the lasting tension this may conveniently be done by changing the angular disposition of the shoe relatively to the thrust bar 54 after a tack has been driven, thereby bringing the tack nozzle 22 out of alinement with the tack already driven and permitting the driving of a second tack. It will be seen that the rounded shape of the workengaging portion of the thrust member 54 facilitates the movement of the shoe relatively to the thrust member incidental to the variation of the angular disposition of the shoe prior to driving the second tack.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent of the United States is:

1. A machine for shaping uppers over lasts having in combination means for engaging and holding in a fixed position a portion of the overlasting margin of an upper on its last, a thrust member constructed and arranged to effect movement of the work relatively to said holding means whereby the portion of the overlasting margin engaged thereby is lasted inwardly over an insole on the last bottom, and a manually operated actuator for effecting engagement of said holding means with the overlasting margin and for thereafter advancing the thrust member to an extent determined by the operator.

2. A machine for shaping uppers over lasts having in combination means for engaging and holding in a fixed position the overlasting margin of an upper on a manually supported last, a thrust member constructed and arranged to engage successively various portions of the periphery of the upper presented toit by the operator, and means for advancing said thrust member thereby to move the work relatively to said holding means.

3. A machine for shaping uppers over lasts having in combination means for engaging and holding in a fixed position the overlasting margin of an upper on its last, a thrust member constructedand arranged to engage ,a portion of the upper between the overlasting margin andthe top of the upper and substantially opposite to the portion of the overlasting margin held in fixed position, and manually-operated means for effecting engagement of said holding means with the overlasting margin and for thereafter advancing the thrust member thereby to. move the work relatively to said holding means.

4. A machine for shaping uppers over lastshaving in combination means for engaging and holding inv a fixed position the overlasting margin of an upper on a manually supported last, a thrust bar slidably mounted in a guideway in the machine frame and arranged to engage successively various side portions of the upper presented to it by the operator, and manuallyoperated means for urging the thrust bar against the shoe.

5. A machine for shaping uppers over lasts having in combination means for engaging and holding in a fixed position a portion of the overlasting margin of an upper on its last, a thrust member constructed and arranged to engage.

a portion of the upper between the overlasting margin and the top of the upper at a point opposite to the portion of the overlasting margin engaged by said holding means, said point being substantially adjacent to the machine frame and the portion of the overlasting margin engaged by said holding means being remotefrom the machine frame, yielding means for holding the thrust member at the limit of its advancement, and manually-operated means for advancing the thrust member in a direction to urge the shoe away from the machine frame.

6. A machine for shaping uppers over lasts having in combination grippers constructed and arranged to engage the overlasting margin of an upper on its last and means for pressing against one side of the shoe thereby to effect relative movement of the shoe and the grippers widthwise of the shoe.

7. A machine for shaping uppers over lasts having in combination grippers constructed and arranged to engage the overlasting margin of an upper on its last, means for pressing against a side of the shoe remote from the portion of the overlasting margin engaged by the grippers, thereby to effect relative movement of the shoe and the grippers widthwise of the shoe, and a common actuating means for said grippers and said shoe pressing means.

8. A machine for shaping uppers over lasts having in combination grippers constructed and arranged to engage the overlasting margin of an upper on its last, means for pressing against one side of the shoe thereby to effect relative movement of the shoe and the grippers widthwise of the shoe, and fastening-inserting means having a constant position relatively to one of the gripper jaws.

9. A machine for shaping uppers over lasts having in combination grippers comprising a stationary gripper jaw and a movable gripper jaw, a member constructed and arranged to move the work relatively to the grippers, and a manuallyoperated actuator for closing the gripper jaws and thereafter advancing said member to an extent controlled by the operator.

10. In a machine for operating on shoes, a pair of grippers comprising a stationary gripping member and a movable gripping member, a thrust work relatively to the grippers, and a manuallyoperated actuator for closing the grippers and for thereafter advancing the thrust member to a limit determined by the operator.

11. In a machine for operating on shoes, a pair of gripper members comprising a stationary gripping member and a movable gripping member, a thrust bar constructed and arranged for movement in a guideway extending from front to back of the machine, yielding means for holding the thrust bar at the limit of its advancement, and manually-operated. means for urging the thrust bar forwardly of the machine. I

12. In a machine for operating on shoes, a pair of grippers, a thrust slide for moving the work relatively to the grippers, means for successively actuating the grippers and the slide comprising a lever, connections between the lever and the slide, and connectionsbetween the lever and the grippers.

13. In a machine for operating on shoes, a pair of'grippers, a thrust slide constructed and arranged to move'the work relatively to the grippers, a detent constructed and arranged for engagement with ratchet teeth provided in the slide, an actuator, a link connecting the actuator tothe detent, and another link connecting the actuator to the grippers whereby the grippers areclosed before the detent engages the slide.

14. In a machine for operating on shoes, a pair of grippers, a thrust member constructed and arranged to move the work relatively to the grippers, a dog constructed and arranged to engage said thrust member, a carrier for the dog, an actuator, connections from the actuator to the: dog, connections from the actuator to the grip-- pers, and means on the actuator for engaging the carrier after the dog has engaged the thrust member.

15. In a machine for operating on shoes, a pair of grippers comprising a stationary gripper jaw and a movable gripper jaw, a thrust member constructed and arranged to move the work rela tively to the grippers, a dog constructed and arranged to engage the thrust member, a carrier for the dog, an'actuator for the carrier so disposed relatively to the carrier as to provide an interval of lost motion of the actuator relatively to the carrier, and means for closing the grippers and effecting engagement of the dog with the thrust member during said interval of lost motion.

16. In a machine for operating on shoes, a pair of grippers comprising a stationary gripper jaw and a movable gripper jaw, a thrust member constructed and arranged to move the work relatively to the grippers, a dog constructed and arranged to engage the thrust member, a carrier for the dog, an actuator for the carrier so disposed relatively to the carrier as to provide an interval of lost motion of the actuator relatively to the carrier, and connections from the actuator for closing the grippers and efiecting engagement of the dog with the thrust member during said interval of lost motion.

1'7. In a machine for operating on shoes, 2. pair of grippers, and a thrust member "for moving the Work relatively to the grippers constructed and arranged to permit movement of the work transversely of the thrust member when said member is in operative engagement with the WOIk.

18. In a machine for operating on shoes, a pair of grippers, and a thrust member for moving the work relatively to the grippers constructed and arranged to permit movement of the work transversely or" the thrust member when said member is in operative engagement with the work, said member having a rounded work-engaging surface having the axis of its curvature disposed heightwise of the work thereby to facilitate movement of the work transversely of said member when the member is in engagement therewith.

ARTHUR F. PYM, Executor 09 the Will of Charles F. Pym, Deceased.

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