US1706279A - Shoe-pressing machine - Google Patents

Description

' Z J Figrl. i 'lf March 19, 1929. E, DUPLEsSls 1,706,279

sHoE PRESSING'MACHINE Filed April so, 1927 s sheets-sheet 1 20 NVENTUE'...

March 19, 1929.

R. E. DUPLESSIS SHOE PRESSING MACHINE Filed April 30, 1927 3 Sheets-Sheet //v VE/VTU/E. r

March 19, 1929. bUPLESSlS 1,706,279

I SHOE PRESSING MACHINE Filed April 50, 1927 3 Sheets-Sheet 5 Patented Mar. 19, 1929.

UNITED STATES PArE r OFFICE.

RENE E. DUPLESSIS, OF BEVERLY, MAssAcnus r'rs;assreNoR. T0 UNITED sHoE MACHINERY conrona'rIoN, 0E PATERSGN, NEW aEEsEY, A CORPORATION OF NEW JERSEY.

SHOE-PRESSING- MACHINE.

Application filed. April 30, 1927. Serial No. 187,858.

This invention relatesto machines for applying pressure to the bottoms of boots and shoes, and is illustrated herein as embodied in a heel-seat forming machine arranged to apply molding pressure to the heel-seat portions of shoes to prepare the shoes for the reception of wood heels, the machine being of the general type disclosed in my prior application Serial No. 36,922, filed June 13, 1925;

In the manufacture of shoes to which wood heels are to be applied, it is usual to trim the surplus stock from the heel-seat portions of the soles of the shoes by beveling the edges of the heel-seat portions of the soles to bring them to a shape approximately complemental to that of the attaching surfaces of the Wood heels which are to be attached. In order to provide a solid heel-seat and to cause the heelseat portion of the sole of the shoe to contact over the greater portion of its area with the ataching surface of the wood heel that. is to be attached, heel-seat forming or molding machines have come into use. A heel-seat forming machine is commonly provided with a mold or a pair of molds or dies readily changeable in accordance with the size and shape of the shoe to be operated upon, a Work support or a pair of work supports, means for causing relative movement of each mold or die and the corresponding work support so as to apply .a heavy molding pressure to the heel-seat portion of a shoe mounted upon a last carried by the work support.

An object of this invention is to provide, in connection with mechanlsm for applying v the heavy molding pressure, improved measuring means by virtue of which the pressureapplying movements of the pressure-applying means will be uniformly effective irrespective of varlations 1n the helghts or thicknesses oi? CllflElGIlt work pieces operated upon.

\Vith this object in view the illustrated ma-- chine comprises a movable support for a shoe on a last, a heel-seat forming mold or die mounted upon a carrier which is movable toward the shoe into preliminary engagement with the shoe, means for preventing reverse movement or regression of the die carrier after the die has been brought into contact with the heel-seat and the shoe properly located relatively thereto,and power mechanism by which the Work supportmay be operated to force the shoe against the die with and V heel-seat forming pressure. In the illustrated machine, the mold or die and its carswing into and out of position under the die so that a shoe placed on the support may be swung into position beneath the die and the die brought down, by operation of the treadle, into contact with the heel-seat. WVhile the die is in light contact with the heel-seat, the position of the shoe relatively to the die may be shifted, as determined by the judgment of the operator, to bring the heel-seat and die into the proper operative relation, after which the pressure of the die is increased to prevent accidental displacement of the shoe, and the heel-seat forming pressure eilected by movement of the work support is then caused to take place. Conveniently and as illustrated, further movement of the treadle which lowers the die may be utilized to trip the clutch for applying the heavy molding pressure to the heel-seat. To this end a yielding connection is provided between the trea-r dle and the mechanism for moving the die,

and a lost motion connection between the treadle and the tripping mechanism of the clutch. Automatic means is provided for releasing the one-way clutch after the forming pressure is released. In the illustrated machine a cam acts on a lever which carries the clutch roll, the cam acting to depress the roll and release the die during the second part of the cycle of the machine.

As usual in machines of this type, the forming pressure is applied by straightening a toggle one end of which is connected to the shoe support and the other end of wihch is supported by apower'lul spring. In order to vary the amount of pressure applied by the machine as required by different kinds ofshoes, the illustrated machine is provided with means for imparting initial tension to the spring and for varying the initial tension, such means being arranged for convenient adjustment by the operator and an indicator being provided, by observation of which the In order to avoid as much movement of the die as would be necessary to take care of the various heights of lasts used in the various sizes of shoes, a height adjustment for the work support is provided which, as illustrated,-is made by a plurality of distinct steps, the die member being employed to take up the distance between the steps. In this way excessive movement of the die, when operating upon small shoes, is avoided.

With these and other objects and features in View, the invention will now be described in connection with the accompanying drawings and pointed out in the claims.

In. the drawings,

Fig. 1 is a side elevation of a machine embodying the present invention;

Fig. 2 is a detail in perspective of parts shown in Fig. 1;

Fig; 3 is a front elevation of one side of the machine, the other side, whic i is a substantial duplicate of the first side, being shown in outline; and i p Fig. 4 is an elevation of a work support showing the shoe and die in section.

Referring to Fig. 1, the numeral 10 indicates the frame of the machine, secured to the upper part of which is a backwardly tilted framework comprising a head 11 rigidly supported by four heavy rods 12 and braced by diagonal members 13. Arranged for sliding movement in the head 11 is a die carrier 14. On the lower end of the die carrier is a die 15 having a stem 16 extending up into the die carrier and provided at one side with a slot and a recess (Fig. 4). Mounted in the die carrier is a spring pin 17 which enters the slot in the stem 16 to prevent turning of the die and also enters the recess to prevent the die from dropping out. By pulling outwardly on the pin 17, the die may be released, removed, and another die substituted for it. At its upper end the die carrier 14 has a pinand-slotconnection at 18 to a lever 20 pivoted at 22 to the head 11, and bein connected between its ends at 24 to a treadle rod 26 which has yielding connection to a treadle 28 pivoted to the frame at 30. The yielding connection comprises yoke 32 pivoted to the lever 28, the rod 26 passing through the yoke and having thereon a spring 34 which is com-- pressible by depression of the treadle between the yoke 82 and a nut on the end of the rod when movement of the rod is arrested. The treadle 28 is raised by a spring 36 which also acts through the yoke 32 and a collar 38 fixed on the rod 26 to move the die carrier 14 away from the shoe.

In treating the heel-seat of a shoe by the die 15, the last of the shoe is placed upon a last pin 40 (Fig. 4) which projects from a slide 42 having a dovetailed connection to a member 44. Movement of the slide 42 is in a direction transverse to the longitudinal medium plane of the shoe and is preferably slightly curved about an axis extending longi tudinally of the shoe and lying substantially in the plane of the heel-seat. The member 44 is pivoted at 46to a head 50 of a shaft 52 which telescopes into a post Between the head 50 and the member 44 is a screw by adjustment of which the position of the member 4% about the pivot 46 may be varied. The screw 561s maintained in ad usted position by a set screw 58. From Fig. Bit will be seen that the screw 5 affords an adjustment by which the plane of the cone of the last restmg on the slide 42 may be varied longitudinally of the shoe with respect to the plane of the face of the die 15 to ensure the proper dis tribution of pressure at the front and rear of the heel-seat. The shaft 52, which telescopes into the post 54, and the post itself are slotted at their lower parts to receive an adjusting member 60 which is pivoted at 62 to the shaft 52 and has a projecting linger piece 63. The lower edge of the member 60 is provided with a plurality of notches 64, 65,66 which are at different distances from the pivot 62. A pin 68 is arranged transversely in the post '54 to,

be engaged by any one of the notches 64, 65, 66. Obviously, by movmg the shaft 52 ver tlcally and swinging the member 60 by its projecting finger piece 63, anyone of the ing tipped backwardly' away from the open,

ator at an angle ofa'bout ten degrees to the vertical so as to enable the'operator' more easily to inspect the shoe and die and determine their relative location. The lower end of the shaft 72 is connected at ?8 to the upper link of atoggle thelower link 82 of which is pivoted at 84 to a plunger 86 arranged for limited sliding movement in a' cylindrical member 88. The plunger 86 is slotted at 90 to receive a pin 92 passing through the walls of the cylindrical member and through the slot in the plunger to'limit movement of the plunger. Beneath the plunger 86 and within the member 88 is a very powerful spring 94 the upper end of which rests against the plunger 86 and the lower end of which rests upon a disk 96. A screw 98 is threaded through the lower :id of the cylindrical member 88 to engage the disk 96 and carries a large gear 100 with which a pinion 102 meshes. The pinion 102 is fixed to the lower end of a shaft 104 arranged vertically and having a lower bearii'ig 108 formed on the cylindrical member 88 and having at its upper end two bearings 110 and 112 (Fig. 3) formed on a bracket 114 secured at 116 to the maagainst the lower end of which the spring bears, is prevented by the pin 92 which passes through the slot 90 of the plunger.

In practice it has been found satisfactory so to proportion the spring 94 and the screw.

98 that the spring may be compressed one half inch by turning the hand-wheel, and that such compression will produce an initial tension of approximately 3000 pounds. The toggle 80, 82 is so constructed and arranged that straighteningof the toggle, if upward movement of the shoe support is prevented, will depress the plunger 86 one halfinch, so that a potential pressure of 3000 pounds may be obtained by straightening the toggle with no initial tension on the spring 94, and if the initial tension of the spring 94 is at the 1112LX1- mum a total pressure of 6000 pounds is obtainable by straightening of the toggle. Clearly, by adjustment of the hand wheel the pressure obtainable may be varied from 3000 to 6000 pounds.

In order to indicate to the operator the amount of initialtension he has applied to the spring 94 by turning the hand-wheel 106, an indicating device, best shown in Fig. 3', is provided. On the shaft 104 between the bearings 110, 112, is a threaded sleeve 118 on which is a nut 120. Secured to the nut 120 is an indicating finger 122 which passes through a slot formed in a web 124 which connects the bear-' ings,'110, 112.

v The finger 122 prevents the nut 120 from turning when the shaft is turned so that the nut will move vertically on the sleeve 118. A suitable scale 126 is provided adjacent to the finger 122 the vertical position of which on the scale indicates the amount of initial tension of the spring 94. Since the pinion 102 is small relatively to the gear 100,

. the movement of the nut 120 and finger 122 is greatly in excess of the actual movement of the disk 96 by the screw 98 by which the initial tension of the spring 94 is produced.

The toggle 80, 82 is straightened by power operated mechanism comprising an: eccentric strap 130 connected at 132 to the middle joint of the toggle 80, 82 and embracing an eccentric 134 on a shaft 136. By means of a suitable one-half revolution clutch mechanism, the eccentric may be connected to a continu ously rotated gear 138 with which a pinion 140 on a shaft 142 meshes. On the shaft142 is a gear 144 which is in mesh with a pinion 146 of an electric motor 148. The clutch is tripped by outward movement of a clutch stop arm 150, which movement is effected'by' a downward movement of a rod 152 connect ed at 154 to the treadle 28. At its upper end the rod 152 has a lost-motion connection at 156 with the clutch stop arm. By reason of the lost motion connection the'treadle may be depressed a predetermined amount before the stop arm150 is operated to trip the clutch. Mechanism similar to that disclosed in my priorapplication above referred to is provided for preventing the eccentric from running ahead of its operating mechanism due to the action of the spring 94 while the pressure is being relieved. g

For the purpose of locking the die carrier 14 against upward or regressivemovement when the shoe support is raised, a roller clutch is provided. This clutch comprises a roll 160 which lies againstan inclined, hardened face162 on the frame and a face 164 formed by the hardened plate secured to the die carrier 14. Regression of the die carrier will, of course, be prevented by pinching the roll 160 between the upwardly converging surfaces 162, 164. In order that the roll may shift-slightly to obtain a full bearing on the converging surfaces 162, 164, the roll is provided with trunnions at its ends which are journaled in blocks 166. The blocks are mounted in grooves 168 formed respectively in the inner faces of the two forward arms of levers 169, 170 which are fulcrumed on a pin 172 passing through the head 11, the grooves 168 extending lengthwise of the levers. This construction is best shown in Fig. 2. The rearwardly extending arms of the levers 169,

17 0 are connected at 17 4 to a yoke 176 on the upper end of a rod 177. The lower end of the 134. Movement of the lever by the cam 186 acts, through the rod 177, to push upwardly on the pivot 174 thus operating the levers 169, 170 to depress the roll 160 from engaging with the surfaces 162, 164 and allowing the die carrier 14 to be raised by the action of the spring 36 which acts to raise the treadlc, the raising of the treadle by the spring 36 causing the'yoke 32 to push upwardly on the collar 38 fixed on the rod 26 to raise the die carrier. The cam 186 is arranged to act on the angle lever 184 during the portion of the cycle in which the pressure is relieved and preferably after the shoe support has descended far enough so that there is no upward pressure upon the die carrier. Normally, that is, when the cam 186 is not acting, the roll 160 is maintained in position to prevent regression of the die carrier by a spring 192.

The operation of the machine is as follows: The operator places the last of a shoe, Such as a turn shoe, the heel-seat of which has been fitted, upon the last pin 40, and swings the shoe and shoe support about the pivot to locate the shoe longitudinally with respect to the die'15. If the space between the heel-seat with respect to the rolls and the die is excessive so that too much movement of the tread'le would be required to bring the die into contact with the heel-seat, the shoe and the telescopi 52 are lifted 54 and the adjusting member '30 swung so as to cause the notch (is to on q'e the pin 68. iii: the worl: support is too high to permit the shoe to be swung under the die, the member would be adjusted to cause the notch. 66 to engage the pin 68; that is, the worl support so located by the step adjustment L ovidod by the notches (i l, 65, 66 and the plate 60, that the shoe will swing under the die without there icing excessive space bet-ween the die and the heel-seat. The treadle 28 is depressed and acts, through the rod 26 and the lever 20, to move the die carrier 14 downwardly to cause the die 15 to cngage the heel-seat ot' the shoe, its the die approaches the shoe, the operator will make the necessary longitudinal and lateral adjustn'ient of the shoe with respect to the die so tiiat the die will be properly located with respect to the heel-seat before the die is pressed too firmly agai, st the heel-suat The operator greatly assisted in making these zuljustments by the fact that the axes along which the movements of the die and shoesupport are effected are inclined away from him at a sui'licient angle to give him readilv a proper view of the die and heel-seat. hen the proper relative positions of the die and heel-scat have been secured, the die is clamped firmly upon the heel-seat by further movement of the treadle 28, this pressure being applied yieldingly by reason of the yielding connection between the treadle and the rod 26.

"ment by the action of the roll l6U.

Vv hen the lost-motion connection at 156 has been taken up by movement of the treadle, the troadle acts to move the arm 150 and trip the clutch, whereupon the eccentric 13 acts to straighten the toggle 80, 82 and force the shoe support upwardly against the die which, of course, is prevented from regress ve move- Since the die is. held frorsi movement, the toggle compresses the spring? 9% a predetermined amount, which pressure applied. to the shoo support. If the spring 9-1 is under initial tension, the straightening ot the toggle apcal movement, a last support, means for moving the die toward the support to engage the heel-seat of a shoe on the support so that the shoe and die maybe properly located with respect to each other, means for holding the die against regression, means for raising the support to impress the die on the heel-seat-of the shoe, and yielding means through which I the support is operated for controlling the pressure of the shoe against the'die.

In aheel-seat tormin machme the combinati'on of a hecl-seat die arranged for vertical movement, a last support, manual means for moving the die toward the support to engage the heel-seat of a shoe on the support so supportarranged for free positioning move-' ment horizontally with respect to the die, a treadle tor moving the die vertically to bring the shoe and die into contact and to apply sufiicient pressure to hold the die and shoe in. proper relative position, means for locking the die in position, and power means becoming 3. In a heel-seat forming machine, the oomomation of a movable heelseat die, a shoeoperative upon further depression of the I trcadle for raising the support to force against the heel-seat material.

the die 4. A machine for forming the heel-seats of shoes for the reception of wood heels having, 111 comblnation, a shoe support arranged to hold shoe bottomup with the heel-seat of I he shoe in full view of the operator, a die movable downwardly prelnninarily agalnst a shoe on the support with SlllfiClQIll) pressure to hold the shoe from accidental displacement after being positioned properly with respect to the die by the operator, means comprising a one-way clutch for preventing regression of the die, and power means for effecting upward movement of the shoe support toward the die to apply heel-seat forming pressure to the shoe. p

5. A machine for forming the heel-seats of shoes for the reception of wood heels having,

in combination, a shoe support "for holdinga shoe bottom up, a die movable downwardly manually toward the support, a clutch for preventing regressive movement ofthe die,

power operated means for raising the shoe support to force the shoe against the die with heel-seat forming pressure and'means for controlling said pressurev 6. A machine for forming the heel-seats of shoes for the reception of wood heels having,

in combination, a shoe support for holding a shoe bottom up, a die carrier movable toward and from the shoe support, a one-way roller clutch acting directly on the die carrier to prevent movement of the carrier away from the shoe, and power means for raising the shoe support to apply heeleseat forming pressure to the shoe, p

7. A machine for forming the heel-seats of shoes for the reception of wood heels having, in combination, a shoe support on which the shoe is presented bottom up with the heelseat in View of the operator, a die movable manually downwardly against a shoe'on the support with sufficient pressure to hold the shoe from accidental displacementafter its heel-seat has been positioned properly with respect to the die, means comprising a one- ,way clutch for preventing regression of the die, power means for effecting upward movement of the shoe support to apply heel-seat forming pressure to the shoe, and means for releasing the one-way clutch after the heelseat has been formed.

8. A machine for forming the heel-seats of shoes for the reception of wood heels having,

in combination, a shoe support, a die movable manually against a shoe on the support with sutlicient pressure tohold the shoe from accidental displacement after being positioned properly with respect to the die, means comprising a one-way clutch for preventing re-- gression of the die, power means for effecting upward movement of the shoe support to apply heel-seat forming pressure to the shoe, and means acting automatically to release the one-way clutch after the heel-seat has been formed.

9. A machine for forming the heel-seats of shoes for the reception of wood heels having, in combination, a shoe support, a die carrier movable toward and from the shoe support, a roller -clutch acting directly on the die carrier to prevent movement of the carrier away from the shoe, power means for raising the shoe support toapply heel-seat forming pressure to the shoe, and power means operating I shoe support, a die and die carrier movable toward the shoe support, a roll adapted to engage surfaces on the frame and the die carrier for preventing movement of the die carrier away from the shoe support, a lever by which the roll is moved out of engagement with the frame and carrier, and cam means for operating the lever to move the roll.

' 11. A machine for forming the heel-seats of shoes for the reception of wood heels having, in combination, a shoe support, eccentric and toggle mechanism for operating the shoe support, a die and die carrier movable toward the shoe support, a roll adapted to engage the surfaces on the frame and the die carrier for preventing movement of the die carrier away from the shoe support, a

' the roll. I

12. A machine for forming the heel-seats of shoes for the reception ofwood heels having, in combination, a shoe support, eccentric and toggle mechanism for operating the shoe support, a die and die carriermovable toward the shoe support, a roll arranged to engage upwardly converging surfaces on the frame and die carrier to lock the die carrier against upward movement, a pair of levers between which the roll is mounted so as to permit lateral movement of the roll and. to require movement of the roll vertically with the levers, and cam operated mechanism connected to the opposite ends of the levers to move the roll downwardly away from the converging surfaces. v v

13. A machine for forming the heel-seats of shoes for the reception of wood heels having, in combination, ashoe support, a die carrier movable toward and from the shoe support, means for preventing regressive movement of the carrier, 21 treadle, mechanism including a yielding connection between the treadle and the carrier for moving the carrier toward the shoe, power means for moving the whereby the power means is set in operation by movement of the treadle after the die has been brought into contact with the shoe, such movement being permitted by the yielding connection between the treadle and the die carrier.

14;. A machine for forming the heel-seats of shoes for the reception of wood heels having, in combination, a shoe support, adie carrier movable toward and from the shoe support, a heel-seat die on the carrier, a treadle mechanism including a yielding connection between the treadle and the carrier for moving the carrier toward the shoe, means for preventing reverse movement of the carrier, power means for moving the shoe support toward the die to apply heel-seat forming pressure to the shoe, a clutch for operating the tion between the treadle and the carrier, and

a cam operating after the power pressure is relieved to release the die carrier and permit it to be moved away from the shoe.

15. A machine for forming the heel-seats of shoes for the reception of Wood heels having, in combinatioma shoe support con structedand arranged to hold a shoe and last bottom up with the heel-seat in view of the operator, a heel-seat forming die, power operated means for relatively moving the shoe support and the die to apply heel-seat forming pressure to the heel-seat of the shoe, a

l heavy spring by which such pressure is apsupport relatively movable for applying pressure to the Work, a toggle for moving one of said parts, a heavy spring forming an abutment for one end of the toggle, means for varying the initial tension of the spring, and means for indicating to the operator the amount of initial tension under which the spring is placed.

17. In a heel-seat forming machine, the

forming an abutment for one end of the toggle, and a screw and gearing arranged to be readily accessible to the operator for adjusting the initial tension of the spring to vary the pressure between said members.

18. In a heel-seat forming machine, 1 the combination of relatively movable members including a heel-seat die and a shoe support for applying pressure to the shoe, a toggle for moving one of said members, a heavy s ring forming an abutment for one end 0' the toggle, means constructed and arranged for convenient operation by the operator to vary the initial tension of the spring, and an indicator operated by the adjusting means by ob-' servation of which the amount of initial ten sion may be estimated. I

In testimony whereof I have signed my nameto this specification. a

' RENE E. DUPLESSIS.

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