US1128723A - Updraw reversing mechanism for pulling-over machines. - Google Patents

Description

W. T, B. ROBERTS. V UPDRAW REVERSING MECHANISM FOR PULLING-OVBR MACHINES.

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THE NORRIS PETERS c0, FHUTO-LITHKl, WASH/Na roN. D, C

W. T. B. ROBERTS.

UPDRAW RBVERSING MECHANISM FOR PULLING-OVER MACHINES. APPLICATION IILED MAR.27, 1912.

Patented Feb. 16, 1915.

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W. T. B. ROBERTS. UPDRAW REVBRSING MECHANISM FOR. PULLING-OVEE MACHINES.

APPLICATION FILED MAR. 27, 1912.

Patented Feb. 16, 1915.

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THE NORRIS PETERS CO., PHOTO'LITHOH WASHING roNv D C.

WILLIAlVI THOMAS BUCKINGHAM ROBERTS, 0F LEICESTER, ENGLAND, ASSIGNOE T0 UNITED SHOE MACHINERY COMPANY, OF IPATERSON, NEW JERSEY, A CORPORA- TION OF NEW JERSEY.

inmates,

Specification of Letters fatent.

Patented Feb. 16, 1915.

Application filed March 27, 1912. Serial No. 686,642.

To all whom it may concern:

Be it known that 1, WILLIAM THOMAS Bnonn: enlist Ronnnrs, a subject of the King of England, residing at Leicester, Leicestershire, England, have invented certain Improvements in Updraw Reversing Mechanism for Pulling-Over Machines, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to pulling-over 1na chines, and is intended to render such machines more ellicient than has been the case with pulling-over machines as heretofore constructed.

The invention is applicable with particular advantage to a pulling-over machine of the type described in the specification of prior United States Letters Patent No. 1,029,387, granted June 11, 1912, on application of R. F. McFeely, and the embodiment hereinafter described by way of example of carrying the invention into practical effect is incorporated in a machine of this character, but it must not however be assumed that the invention pertains only to the machine as described in the specification of the aforesaid prior patent.

In the pulling-over machine of the kind described in the specification above referred to, the shoe with the upper material projecting above the face of the last is presented to the machine, which is then started by the operation of a pedal. Toe and side grippers are thereby caused to grip the upper and by a relative movement between the grippers and the last the upper is put under tension. The driving shaft of the machine having completed one half a revolution then stops with the shoe thus held giving the operator an opportunity to examine the work and see whether it is positioned properly and to straighten the upper by the usual adjustments provided in the machine for that purpose if that can be done. When the work is found to be so positioned the machine is re-started and the driving shaft performs the second half revolution during which the pulling-over operation is completed and the securing tacks are inserted. Should however the operator find the upper has been improperly gripped a read ustment of the upper 1n the gripper 1s necessary and in the machine as heretofore constructed this has been effected by tripping each pincer separately by hand and then withdrawing the shoe in order to re adjust its position. This operation entailed considerable loss of time and a further obection was found in that the machine had to be restarted to run idly while the second half of the revolution of the driving shaft was effected to bring the grippers again into operative position and furthermore during this idle operation a set of tacks was wasted by being driven from the tack carriers.

An important feature of this invention consists in the combination of power operated devices to tension an upper about a last and then pause holding the upper, with power operated means for reversely moving the tensioning devices independently of the normal operation of the machine. This feature of the invention is herein illustrated as embodied in a mechanism by which an improperly gripped upper can be released and gripped again with less difficulty than has been previously experienced, whereby a saving of time is effected.

A. further feature of the invention consists in providing a pulling-over machine in which power operated devices stress the upper about a last and then pause, with additional power operated means so arranged that at the will of the operator either the upper can be secured to the last or the upper stressing devices can be returned to their starting position.

The poweroperated means preferably comprise according to a further feature of the invention a reversing mechanism and manually operable means by which the said mechanism can be controlled to cause the machine either to secure the upper to the last or to return the stressing devices to their starting position. The reversing mechanism aforesaid may be employed in a pulling'over machine wherein the cycle of operations comprises two portions of which each portion is effected through a half rotation of a driving shaft the arrangement being such that after the driving shaft is turned through the first half revolution it can be rotated forwardly through another half revolution to effect the operation of the machine or turned back through half a revolution to return the stressing devices to their starting position.

According to a preferred construction hereinafter more fully described the reversing mechanism may comprise two sets of differently arranged connections between a driving member and a driven member and the manually operable means can cause either one of such connections to become operative. With this construction a connection is employed between the manually operable means and the tack supply, the arrangement of the connection being such that the supply of tacks will be suspended while the machine is running reversely and returning the stressing devices to their starting position.

The invention also comprises as features automatic means that prevent the stressing devices from being returned to their starting position until the said devices have paused after stressing the upper and means to prevent the machine from being started while the change in the operation is being efiected. The means last referred to may comprise a safety device which is also arranged to start the machine at the comple tion of the reversing operation.

A preferred construction according to this invention will now be described with the aid of the accompanying sheets of drawings but it is to be understood that the invention is not confined to the specific construction described or to the particular arrangement of the parts as illustrated.

In the drawings: Figure 1 is a side view of a pulling-over machine with the invention embodied therein, a part of the driving pulley shown therein being broken away to show more clearly the construction of the mechanism forming the subject of this invention; Fig. 2 is an end view regarded from the left of an observer of Fig. 1 with parts of the machine shown in section; Fig. 3 is a view substantially in the plane of the line 3-3 of Fig. 2, the parts being drawn to a much larger scale than in that figure; Fig. 4 is a plan ofthe upper part of a pullingover machine showing the means by which the supply of tacks is suspended.

According to this embodiment of the invention the main shaft 2 of a pulling-over machine of the type hereinbefore referred to is provided with reversing mechanism so arranged that by the actuation of the said mechanism the main shaft will either be driven forwardly to effect, through the various mechanisms and devices, the operation of pulling-over, as it is usually effected in this type of machine or by which the shaft can be driven through a half revolution in the reverse direction in order to effect the release of an improperly gripped upper.

The reversing mechanism may, according to this embodiment of the invention, advantageously comprise the following parts arranged in the manner now set forth: The pulley 4: by which the machine is driven is provided with a gear wheel or pinion 5, Fig. 2, which may be either secured thereto or formed as an integral part thereof. This gear wheel 5 meshes with another pinion (3 fixed upon an mounted in bearings upon the machine frame and is disposed in parallel relationship with the main shaft 2 of the machine. The intermediate shaft 8 is also provided at its left hand end, see Fig. l and also Fig. 2, with a second gear wheel or pinion 10 which is relatively wide. The pinion 1O meshes with another gear wheel 12 upon another shaft 14: also in parallel relationship with the main shaft of the machine. The shaft 1 1 is further provided with another gear wheel 16 in mesh with a corrcspending gear wheel 18 loosely mounted on a clutch-carrying shaft 20 that is geared to the main shaft 2 of the machine. As shown in the drawings the main shaft is driven from the clutch-carrying shaft by a pinion 22 on the latter shaft which gears with a pinion 24 on the main shaft. The pinion 10 is, as compared with the other gear wheels or pinions, of greater width and the purpose of this extra width is to enable this pinion not only to gear with the gear wheel 12 on the shaft 14 as already described but also to gear with another gear wheel 25 on the clutch-carrying shaft 20. This gear wheel 25 on the clutch-carrying shaft 20 similar to the gear wheel 18, already described is mounted thereon, is loose on the shaft but either of these gear wheels 25 or 18 is capable of being clutched thereto. It will be obvious that according to which of the loosely mounted wheels 25 or 18 is clutched to the clutch-carrying shaft 20 so will the latter rotate the main shaft 2 in one or the other direction as the wide pinion 10 in the one case drives through the intermediate pinions 12, 16, which are rigidly connected together, to the gear wheel 18 while in the other case the pinion 1O gears directly on to the gear wheel 25 at such time clutched to the shaft 20.

lVhen connection between the driving pulley 1- and the clutch-carrying shaft 20 is made through the gear wheels 12, 16 on the shaft 14 the driving shaft 2 will be operated in the same direction as that in which the driving pulley 4 is rotated. \V hen the shaft is rotating in this direction the inachine will be acting to effect the pullingover operation. lVhen, however, the connection is made from the pulley -1- to the clutch-carrying shaft 20 directly from the wide pinion 10 on the intermediate shaft 8 the machine will be reversed to release the intermediate shaft 8 which is ames grippers and permit the position of the upper to be readjusted.

For the purpose of putting one or the other of the loosely mounted gear wheels 25 or 18 in connection with the clutchcarrying shaft 20 a double jaw clutch 30 is provided on the said shaft between the gear wheels, he said clutch being movable longitudinally to cause one or the other of the jaws 32 or 3&- to engage with one or the other of corresponding sets of jaws on the opposed faces of the gear wheels 25, 18 respectively.

The clutch 30 as shown is operated by a yoke piece 4E0 carried by a sliding rod which is mounted in hearings to move in a direction parallel with the axis of the main shaft 2. The sliding rod a2 is operated by a lever l?) fulcrumed at 4:4: upon the machine frame and connected with the said sliding rod d2 through a yielding connection so as to allow the jaws of the clutch to come into engagement after the rod has been moved and also to prevent damage to the parts of the mechanism. The yielding connection as shown in the drawings comprises a rod 1:6 mounted to slide within the sliding r-od 112, the rod 4:6 being acted upon by springs one of which at the rear end acts through the plunger 17 inclosed within the end of the rod 42. The inner rod 46 is connected with the end of the lever t5 and a slot is provided to permit of the relative movements of the rods 42 and 16. The lever 45 for actuating the sliding rod 42 is operated by a hand lever 50 which is fulcrumed at 51 to the frame of the machine and is connected with the lever 45 by a sliding connection 52 so as to compensate for the different arcs struck by the ends of the two levers.

The mechanism as thus far described constitutes a means for reversing the machine which can be thrown into action at any time. This, however, is undesirable and accordingly means are provided to insure that the reverse shall not take place except between the first and second portions of the cycle of operation of the machine. According to the preferred embodiment of the invention these means comprise a locking device which is adapted to act upon the sliding rod 42 to secure it from longitudinal movement and a releasing device for the lock which will act to release the rod for movement when the machine has stopped after the first portion of the cvcle of operations has taken, place. The locking device preferably consists of a plunger 60, Fig. 2, located at right angles to the sliding rod 42 and provided with an abutment 62 which normally is held bv a spring 63 in a position to enter a corres onding recess on the sliding rod 42. To withdraw the abutment from the recess and release the sliding rod 42 a cam block 65%, see F ig. :2, is provided having a projec tion 65 which is adapted to act on the end of the spring-pressed plunger 60. In this type of machine a foot pedal is usually employed to start the machine the pedal acting through a vertically sliding rod such as having a beveled portion that is adapted to press against a correspondingly beveled part on a starting clutch tripping slide 79 In order to prevent the treadle from being operated accidentally during the period that the clutch is being moved to effect the reverse movement of the main shaft a safety device is provided. According to this embodiment of the invention this device comprises a cam mounted on or formed integrally with the hand lever 50 that is connected with the lever l5 by which the sliding rod 4:2 is moved to effect the operation of the clutch.

The cam is provided with a groove 7%, Fig. 2, in which is engaged a roll mounted on a sliding plate that is adapted to move in a guideway and is so located that as the hand lever 50 is turned to bring the double jaw clutch 30 into engagement with the gear wheel 18 by which the reverse movement of the main shaft 2 is effected the cam groove 74: will cause the end of the sliding plate 7 5 to project over the top of the vertically sliding rod 70 operated by the pedal. By the plate 75 preventing the upward movement of the sliding rod 70 the pedal will be rendered inoperative during the reversal of the main shaft. To cause the machine to be operated when the main shaft 2 has been reversed by the operation of the clutch mechanism the sliding plate Y5, see Fig. 3, which is operated by the cam groove 7 of the hand lever 50, is provided with abeveled end 75 which is adapted to press against correspondingly beveled end 73 on the starting clutch tripping slide 72 at the same time that the slide 75 prevents the pedal rod 70 from being operated. The cooperation of the beveled portion 76 on the sliding plate 75 with the beveled part 73 on the clutch tripping slide 72 causes the machine to be come operative and to be turned in the reverse direction through a half revolution of the main shaft '2, a clutch usually proided in this machine automaticallv operating to stop the motion at the end of the half rotation of the main shaft. The mechanism for operating the starting clutch by the movement of the clutch-tripping slide forms no part of this invention but is illustrated and described in the specification of United States Letters Patent No. 1,029,387, to which reference may be made.

To prevent the tack separator from operating during the time the main shaft is moving through its reverse half revolution a lever 80., see Figs. 1 and 4, is provided which lever is centered at 82 upon a stationary part of the machine and is normally held in raised or inoperative position by a spring indicated at 83, Fig. 4:. The lever 80 is connected by a flexible connection 84 with the hand lever 50, see Fig. 1, and is guided, as shown by a tube 85. When the hand lever 50 is turned so as to move the clutch 30 to reverse the movement of the driving shaft the lever 80 will be drawn downward through the connection 84: whereby its end 86 will be interposed between the tack separator slide 88 and its actuator 89, which is yieldingly moved endwise by mechanism described in said prior patent, and by preventing the movement of the latter stop the supply of tacks. The spring 83 which holds the lever 80 normally raised may be strong enough also to act, when the operators hand is removed from lever 50, to turn that lever backward, in Fig. 1, and automatically disengage the clutch 30 from the reversing gear and reengage it with the forwardly driving gear, as well as to withdraw the safety slide 75, ready for the normal operation of the machine -to be resumed when the starting treadle is again depressed. The lever 50 may be retained against accidental displacement from its normal position by a spring plunger 53, Fig. 3, for which a seat is provided in the frame.

The operation of a pulling-over machine in which this invention is embodied will no doubt be understood from the foregoing description but it may be recapitulated briefly as follows :After the shoe has been presented to the machine in the usual way the pedal is operated to start the machine. This causes the grippers 90, located at the end and sides of the forepart of the shoe, to be closed together to grip the upper and then lifted to tension the upper by power transmitted, from cams not shown on main shaft 2, yieldingly through springs 92 and levers 94 which are fulcrumed at 95 to the frame and to which the grippers are pivotally connected, all as and by mechanism which may be like that described in said prior Patent No. 1,029,387. The machine then automatically stops. The operator can then see if the upper is in proper position and if so, by a further depression of the treadle, the machine may be put into operation to complete the pulling-over operation by overdrawing and securing the upper, the securing being effected by tackers 96 having drivers 97 which are actuated by the power operating mechanism substantially as in said prior patent to insert tacks supplied from the separator slide 88. If on the other hand the operator finds that it is necessary to readjust the upper in relation to the grippers he turnsthe hand lever 50 so as to bring the reversing mechanism into action and at the same time through inter-action of the beveled portion 76 on the sliding plate and the beveled portion 73 the starting clutch tripping slide 72 causes the machine to continue its movement but in the reverse direction so that the grippers will be made to release automatically the upper and permit it to be re-adjusted. During this reverse movement of the machine the lever will be operated to engage the tack separator slide actuator 89 to prevent the tacks from being separated. At the conclusion of the half revolution of the main shaft 2 the machine will come to rest and as soon as the hand lever 50 is moved to return the reversing mechanism to its first position the ma chine will be ready for operating on the shoe which can be re-adjusted into correct position before starting the machine.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. A pulling-over machine having, in combination, power operated devices to tension an upper about a last and then come automatically to rest, holding the upper under tension, and power operated means for reversely moving said tensioning devices independently of the regular operation of the machine.

2. In a pulling-over machine, power operated devices to tension an upper about a last and then come to rest, and additional power operated means so arranged that, at the will of the operator, either the upper can be secured to the last or the upper tensioning devices can be operated backwardly to their starting position.

3. In a pulling-over machine, power operated devices to tension an upper about a last and then come to rest, and additional power operated means so arranged that, at the will of the operator, either the upper can be secured to the last or the upper tensioning devices can be returned to their starting position, combined with automatic means to prevent the tensioning devices from being returned to their starting position until they have first come to rest after tensioning the upper.

4-. In a pulling-over machine, power operated devices to tension an upper about a last and then come to rest, and additional power operated means so arranged that, at the will of the operator, either the upper can be secured to the last or the upper tensioning devices can be returned to their starting position, combined with means to prevent the machine from being started while the change in the operation of the machine is being efl'ected.

5. A pulling-over machine having, in combination, upper pulling devices and power operating mechanism therefor having a normal cycle and means for causing a rest before the completion of the cycle, and power driven means which can be rendered r aaras operative at the will of the workman for causing the operating mechanism to reverse and return the pulling devices to their starting position instead of completing the cycle.

6. A. machine for use in the manufacture of shoes having, in combination, means for operating on the shoe, operating mechanism therefor having a normal cycle, means for causing a rest in the machine s operation before the completion of the cycle, and provision by which the operator can cause the power mechanism to reverse and return the operating means to starting position instead of completing the cycle.

7. A pulling-over machine having, in combination, upper pulling devices and power operating mechanism therefor having a normal cycle and provision for interruption of the cycle before its completion, of reverse driving means and power operated means by which the operator can, if desired, cause the reverse driving means to return the pulling devices to starting position instead of completing the cycle.

8. In a pulling-over machine, upper pulling devices and upper securing devices and power operated means therefor which, comprises a reversing mechanism, and means arranged for manual operation by which the said mechanism can be controlled to cause the machine either to secure the upper or to be reversed so as to return the pulling devices to their starting position.

9. In a pulling-over machine, upper pulling devices and upper securing devices and power operated means therefor, and means controlled by the operator for causing the power mechanism to run backward and release the shoe without securing the upper.

10. In a pulling-over machine, upper pulling devices and upper securing devices and power operated means therefor, and controlling means arranged for manual operation to determine for each shoe whether the upper shall be secured or shall be released by the action of the driving power on the pulling devices without causing the machine to go through that portion of its cycle during which the securing devices normally operate.

11. A shoemaking machine having, in combination, devices for working on a shoe, power operating mechanism therefor having a definite cycle, and means arranged for manual control during one period in the cycle to determine whether the cycle shall be completed or, alternatively, the power operating mechanism shall reverse the movement and restore the devices to starting position.

12. In a pulling-over machine, grippers and operating mechanism including a driving shaft having a cycle comprising two portions of which each is effected through a n5 partial rotation of the driving shaft, comhined with a reversing mechanism that can be rendered operative at the option of the workman after the first part of the rotation of said shaft to rotate the driving shaft reversely to its starting point.

13. In a pulling-over machine, grippers, tackers, operating mechanism including a driving shaft therefor wherein the cycle of operations comprises two portions of which each portion is effected through a half rotation of the driving shaft, and a reversing mechanism arranged to cause the driving shaft to be rotated either forwardly or reversely through half of a revolution after the first half revolution has been effected.

14:. In a pulling-over machine having grippers, power operating mechanism which automatically comes to rest with the grippers holding the upper, and reversing mechanism which can be connected with the power mechanism to cause the grippers to back down.

15. In a pulling-over machine having grippers, power operating mechanism which automatically comes to rest with the grippers holding the upper, reversing mechanism which can be connected with the power mechanism to cause the grippers to back down, and automatic mechanism which, until the grippers have come to rest after seizing the upper, prevents the adjustment of the reversing mechanism.

16. In a pulling-over machine having grippers, power operating mechanism which automatically comes to rest with the grippers holding the upper, reversing mechanism which can be connected with the power mechanism to cause the grippers to back down, and a safety device which is actuated by manually operated means to prevent the machine from being started while the reversing means is being operated.

17. In a pulling-over machine having grippers and power operating mechanism which can come to rest with the grippers holding the upper and then further operate the grippers to lay the upper over the last, means arranged for manual operation to cause the operated means to be reversely turned by the power.

18. In a pulling-over machine having grippers and power operating mechanism which can come to rest with the grippers holding the upper and then further operate the grippers to lay the upper over the last, a reversing mechanism, and means arranged for manual actuation to set the reversing mechanism and automatically start the operating mechanism.

19. In a pulling-over machine having grippers and power operating mechanism which can come to rest with the grippers holding the upper, a reversing mechanism, and means arranged for manual actuation to prevent the machine from being started ahead, to set the reversing mechanism, and to start the power to turning the operating means backward.

20. In a pulling-over machine having grippers and power operating mechanism which can come to rest-with the grippers holding the upper, means for supplying upper fastening tacks and means arranged for manual operation to cause the power to drive the said operating means backward and to cause the supplying of tacks to be discontinued.

21. In a pulling-over machine having grippers and power operating mechanism which can come to rest with the grippers holding the upper, reversing means for said operating mechanism, tack supplying means, a tack supply stop, and a controller for said reversing means which is also operatively connected with the tack supply stop.

22. In a pulling-over machine, grippers, a tack supply, power operating mechanism therefor which can come to rest with the grippers holding the upper and comprises two difierently arranged connections between the driving member and the-driven member, and manually operated means by which either connection can be rendered operative.

23. In a pulling-over machine, grippers, a tack supply, power operating mechanism therefor which can come to rest with the grippers holding the upper and comprises two differently arranged connections between the driving member and the driven member, manually operated means by which either connection can be rendered operative, and a connection between said means and the tack supply to suspend the delivery of tacks during movement of the driven member by one of said two connections.

24. In a pulling-over machine, means for pulling-over the shoe, power operating mechanism therefor, a starting treadle to cause the power operating mechanism to advance the pulling-over means and a second manually controlled device and connections to cause said mechanism to move the pullingover means reversely.

25. In a pulling-over machine, means for pulling-over the shoe, power operating mechanism therefor, a clutch, normally closed connections through which said mechanism advances the pulling-over means, reversing driving means, and means for disengaging the clutch from its normal connections and engaging it with the reverse driving means.

26. In a pulling-over machine, means for pulling-over the shoe, power operating mechanism therefor, a clutch, normally closed connections through which said mechanism advances the pulling-over means, reversing driving means, and means for disengaging the clutch from its normal connections and engaging it with the reverse driving means, said clutch shifting means serving also to start the driving mechanism after the engagement with the reversing means has been established.

27. In a pulling-over machine, means for pulling-over the shoe, power operating mechanism therefor, a starting treadle to cause the power operating mechanism to advance the pulling-over means, a second manually controlled device and connections to cause said mechanism to move the pullingover means reversely, and means for automatically restoring the initial condition after the said second manually controlled device has been used.

28. A pulling-over machine having, in combination, pulling-ovcr means and power operated means therefor comprising a, reversing mechanism and manually operated means by which the reversing mechanism can be controlled to cause the pulling-over means either to carry their operation to completion or to reverse it when partially completed.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM THOMAS BUCKINGHAM ROBERTS.

Witnesses:

FREDERICK WILLIAM \Vonrn, ARTHUR ERNEST JERRAM.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. C.

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