US2601268A - Rough rounding and channeling machine - Google Patents

Description

J1me 1952 H. E. ELLIOTT ETAL 2,501,263

ROUGH ROUNDING AND CHANNELING MACHINE Filed Jan. 5; 1951 4 Sheets-Sheet l In mentors .hQzrolclErnesfElliozf Harold John Gedrge By zheLr/[orney June 24, 1952 H. E. ELLIOTT ETAL 2,601,268

ROUGH ROUNDING AND CHANNELING MACHINE Fiked Jan. 5, 1951 4 Sheets-Sheet 2 In venzors Haraldfrnasf fl/(ozl Harv/a John George Arzhur Alan Riuz'ngfon By lheir fliforney June 24, 1952 H. E.ELLIOTT ETAL ROUGH ROUNDING AND CHANNELING MACHINE 4 Sheets-Sheet 15 Filed Jan. 5, 1951 Inveniors Hara/dE'r'nesz Ellioff 0 WWW Wh e G.W0 R n mnfl% o w Jn me M M mm Q/NB A the machine.

3 these feeding members a channeling knife 22, associated with the feed foot 20, makes a channeling cut in the sole, back feeding of the work being prevented during this time because it i gripped between a presser foot 2 's, which engages the bottom of the sole, and the flange 12. Just as the feeding movement of the feedin members begins, and throughout such movement, the presser foot is separated from the flange so as to minimize their resistance to the feeding of the work. Having broadly outlined the use and operation of the principal work-engaging elements of the machine its construction will now be described in detail.

The above-mentioned flange l2 has a serrated lower surface and is slightly tapered in thickness toward its forward edge which, as viewed in plan (Fig. 4.), curves rearwardly toward the right of The plate or guide [4 projects upwardly from the rearward edge of the flange and, as viewed in plan, conforms generally to the curved shape of the flange and projects from the flange toward the left across the anvil l8, the left-hand extremity of the guide also being curved toward the rear of the machine. The Work rest is carried by a bar 26 which is adjustable crosswise of the edge of the knife in a groove formed in the lower side of the head of the frame 23, and may be secured in any desired position of adjustment by setting up a clamp screw 30 which is vertically mounted in a. boss 32 on the frame.

The presser foot 24, is adjustably fixed upon the forward notched end of a lever 34 which is mounted for swinging movement in a vertical plane to relieve the gripping pressure of the presser foot upon the work as described above. The presser foot has a round shank 3B which is received in a hole in the lever, permitting the presser foot to be adjusted forwardly and rearwardly of the machine. The presser foot is secured in adjusted position by a stud 38 which is notched to receive the shank 35, and is threaded into a nut 48 which may be set up against the side of the lever to lock these parts together.

The lever 34 extends to the rear of the machine where it is mounted to swing, about a horizontal axis, upon a stud 42 fixed to the frame. The lever also extends downwardly below the stud and carries at its lower end a, pin 44 around which is hooked one end of a spring 46. The spring is stretched between the pin =44 and another pin 48 which is clamped in the end of an arm 50 which is mounted to swing upon a stud 52 fixed in the side of the frame. The pin 48 projects through an arcuate slot 54 formed in the right-hand side of the frame and carries a knob 55 which slides axially upon the pin and is yieldingly held in engagement with the side of the frame, the latter having notches 58 arranged to receive the shank of the knob whereby the lever 50 is held in whatever position into which it has been adjusted. It is evident that the spring 46 will cause the presser foot 24 to be urged upwardly with the greatest force when the spring is horizontal, as illustrated in Fig. 2,

and that this pressure is diminished the higher the knob 56 is raised. This adjustment is useful to adapt the machine for operating upon various types of sole material. In the case of crepe rubber, for example, the use of a fairly light clamping pressure is required in order not to distort the sole.

The anvil I8 is mounted with its forward edge disposed somewhat rearwardly of the forward 4 extremity of the flange [2, its work engaging surface being level with that of the flange and also being serrated forwardly of that part which is engaged by the knife [6. The anvil has a dovetailed shank 60 (Figs. 1 and 4) which is received in a similarly shaped recess in the forward bifurcated end of an arm 62 in which the shank 60 is secured by a clamp screw 64. The arm 62 curves downwardly toward the rear of the machine and has integral therewith a sleeve 66 which is bored to receive a shaft 68 the ends of which are pivotally mounted in bosses 1D, 12 which are integral with the frame. This mounting of the arm 62 permits the anvil [8 to swing laterally of the work rest in a horizontal plane,

and the feed foot 20 always moves laterally with the anvil as will now be described.

The feed foot is mounted upon the forward end of an arm 14 which extends to the rear of the machine where it is mounted to swing upon a horizontal shaft 16 which is fixed in a bracket 78 formed integral with the sleeve 66. The arm 14 is constantly urged upwardly to cause the sole to be gripped between the feeding members I8, 20 by a spring 80, the upper end of which is seated in a recess in the lower side of the arm 14, and the lower end of which rests upon a lug 82 which is integral with the frame. The spring is held on the lug by a guide rod 8| which extends upwardly inside of the spring and is fixed to the lug. In order to prevent interference between the anvil, and the channeling knife or the presser foot, when no work is in the machine, upward movement of the arm 14 is limited by a screw 84 arranged to engage the upper side of the arm 14, and threaded in a lug 86 which projects laterally from the left-hand side of the arm 62. The feed foot may be lowered in order to facilitate presenting the work to the machine by depressing a treadle (not shown) which is connected by a rod 88 to a hook 90 which is secured to the arm 14. The presser foot 24 is lowered simultaneously with the feed foot owing to the provision of a lug 92 (Fig. l) which extends from the arm 14 over a shoulder 93 on the arm 34 upon which the presser foot is mounted.

The feeding members are urged towards the left during their feeding movement by a spring 94 which is compressed between a pair of studs 96, 98 having rounded ends arranged to engage tapered seats formed in the arm 14 and a plug I00, respectively, the latter being threaded into the right-hand side of the frame. The adjacent ends of the studs 96, 98 are recessed and reduced, respectively, so that the studs freely telescope with respect to each other as the arm 14 oscillates.

The feeding movement of the feeding members, caused by the spring 94, is under the control of mechanism comprising a cam I62 at the lower front of the machine, this mechanism also being arranged positively to impart the return motion to the feeding members. The cam is fixed to the forward end of a drive shaft I04 which is mounted to rotate in a bearing I05 fixed in the forward part of the frame, and another bearing H38 mounted in the boss 72. The drive shaft may be driven by any suitable means such as a pulley (not shown) fixed to the rear end of the shaft. Arranged to run upon the periphery of the cam IE2 is a follower roll H0 which is mounted upon the lower end of a lever H2, the latter being mounted to swing upon a horizontal shaft H4 which is fixed in a pair of lugs H6 formed integral with. the frame. The upper end of the lever I112 carries a rounded pin I-I8 which engages aibearing surface I20 (Fig. 3) on the right-hand side of the arm 14.

The feeding members I8, 26 are shown in Fig. l:in the position which they occupy at the beginning of a feeding stroke, the roll follower IIfl engaging a higher part of the cam I02 which rotates in a clockwise direction. When the cam rotates from its illustrated position a falling slope upon it passes the roll IIB allowing the lever I I2 toswing counterclockwise under the influence of the spring 94. Thus, a feeding movement is imparted to the feeding members directed toward the left. At the end of this movement a concentricportion of the cam I02 causes a dwell in the movement of the feeding members during whichthe knife It makes a trimming cut through the sole against the anvil I8. Upon completion of the cutting stroke of the knife a rising slope upon the cam I82 causes the lever M2 to beswung clockwise, thereby imparting a positive return stroke to the feeding members.

The knife I6 is fixed to the upper end of a plunger I22 which is mounted to reciprocate vertically in a sleeve I24 formed integral with the frame of the machine. The plunger is driven from the drive shaft Ifl l through connections comprising roll 26 on a crank pin I21 fixed to the forward surface of thecam I32, and a block I28 which is secured by screws I38 to the lower end of the plunger and is provided with a cam groove I32 in which the roll IZE runs. The lower side of vthecam groove I32 has a hump I34, and a conjugate recess I36 is formed in the upper side of the cam groove. The purpose of this shape of the cam groove is to cause a relatively rapid cutting stroke and a slower return stroke. On the completion of the feeding movement of the feeding members, which is about s in extent, the knife It will have moved through more than half of its upward stroke and will be close to the bottom of the sole. At this point the above-mentioned dwell in the action of the cam I82 takes place, and the dwell continues while the rounding knife completes its cutting stroke against the upper feeding member I8. The above-mentioned cam groove I32 is so shaped that the rounding knife, after it has penetrated through the work, is eased back very slightly out of contact with the anvil IS. The relatively slow return movement of the knife causes it to remain in the work through a considerable portion of the return stroke of the feeding members during which time the work is also held against any back feeding movement by the gripping action of the presser foot 24 and the work rest iii. It is also during the return movement of the feeding members that the channeling cut is made by the channeling knife 22, the path of the knife being substantially straight because its stroke is so short compared to its radial distance from the axis of the shaft 6-8 about which it swings.

During each feeding movement of the work the presser foot 24 is moved slightly away from the workrest ID in order to eliminate any resistance to the feeding of the work by these members. This action of the :presser foot is provided by mechanism comprising a cam I38 fixed to the drive shaft Iced, a lever :I 410, and links I42. The cam is provided with a groove I44 arranged to receive a roll follower Hi which is mounted upon the lower end of the lever I40, "the latter 'being arranged to swing in a vertical plane on a pin.

Hi8 whichisfixedinithe frame- "The upperrends of the :lever Mi! randilinks "I i2iarezpivoted'together by .a .pin M156, :and the lower end of each linkxis provided with an elongated slot 152 which receives a pin :IM acarriediby an .arm I55 formed integral with the w above mentioned arm x31 which carries the presser foot. The purpose pf the elongatedsiots I332 is .to permit the presser :foot 2d to be lowered, without interference .with the pin led .farenough .toxpermit the work to hemesented to the :machine.

'flhecam :groove I44 isso shaped as to cause the upper part of the lever :1 4.0 and the links 142 to move rearwardly at the beginning of each feedingstroke of the feeding members, the lever and links having a toggle action "at this time which forces the :arm ITSG downwardly. The above described action of the lever and links is reversed .at the beginning of each return stroke of the feeding members in order to permit the presser foot .to grip the sole against the work rest when the return stroke of the feeding members and the cutting stroke or" the channeling knife occur.

The feed foot 20 is readily removable from the arm 14 in order to'facilitate the removal-of the channeling knife whenever'it is to be sharpened. Furthermore, provision is made not only for accurately adjusting the-feed foot 20 so as to control the position of the channeling knife with reference to the trimmedsole edge, but also for insuring that the channeling knife and feed feet will, upon being replaced in the machine, be located in their original positions without attention from the operator. The structure just referred to comprises a slide "I58 which extends rearwardly from the feed foot and is movablein a slot in the arm '14 which is covered by a plate I59. In the lower sideof the slide near its rear end there is a diagonal slot arranged to receive a key I which projects upwardly from a bar I152.

The baris mounted to slide crosswise of the ma chine in a slot formed in the arm I 4 and has threaded therein ascrew I64 upon the outer end of which'a knob IE5 is fixed. The screw is mounted to turn, without axial movement, in a pin I68 which is supported by a pair of lugs "I10- in such a manner that the'bar I62 may be swung downwardly to move the key I60 out of engagement with the slide 158, permitting "the feed'foot to be freely removed from the arm -14. A spring I12 (Fig. 1) which is received in a hole formed in the arm 14 bears against the lower side of the bar I62, urging the latter constantly about the axis of the pin I-68 into engagement with the slide r58. It will now be evident that because of the diagonal key and slot connections between the bar I62 and the slide I58, a fine adjustment of the feed foot and channeling knife, toward or away from the rounding knife, may be effected by turning the knob 166 .in the appropriate direction. Moreover, the feed foot upon being replaced in the machine is definitely located in its former adjusted position when the key I60 "snaps into the groove in the slide 158 under the influence of the spring I12.

The channeling knife 22 is mounted for vertical adjustment, to vary the depth of the channel which it cuts, in a groove in the rear side of the feed foot 20. The knife is clamped in this groove by a stud I14 having a head which overlies the left-hand edge of the shank of the knife and which is clamped against the knife by setting up a nut I16 which is threaded on the stud within a recess in the forward side of the feeding member.

The use and operation of the machine will now be briefly summarized. The feed foot 20 and the presser'foot 24 are first lowered simultaneously by depressing the treadle which is connected to the rod 88. Assuming that the work to be operated upon is a welted shoe having a repair sole temporarily attached to its bottom, the shoe is presented to the machine with the flange l2 and anvil 18 inserted between the sole and the shoebottom, and so that the edge of the welt engages the guide l4, the shoe being in its normal upright position. The presser foot and feed foot are now released and hold the sole against the flange l2 and anvil l8, respectively. Upon applying power to the drive shaft I04 the machine acts in a succession of cycles to feed the work stepby-step, and to make one rounding out and one channeling cut on the sole during each cycle, while the operator holds the shoe and guides it in such a way as to insure that its bottom remains substantially level and in the proper relation with respect to the guide l4, that is to say, in the case of a welted shoe, with the edge of the Welt engaging the portion of the guide opposite to the knife-edge.

To explain the operation of the machine it will be sufficient to describe one complete cycle of operation only, such cycle to begin when the feeding members are at the ends of their return stroke, that is, when they are closely adjacent to the flange l2 and presser foot 24. At this time the work is about to be released from the flange l2 by the presser foot, and the knife [6 will have been moved slightly away from the anvil l8. Rotation of the drive shaft will, at this stage, cause simultaneously the completion of the return stroke of the knife and the retraction of the presser foot. As the rounding knife approaches the lower limit of its travel the falling slope of the cam I02 permits the feeding members to move to the left, under the influence of the spring 94, thereby imparting a feeding movement to the work. At the completion of this feeding movement, of about T g" in length, the rounding knife will have passed through more than half of its cutting stroke and will be close to the bottom of the sole. Now, a dwell in the motion of thefeeding members occurs, continuing while the rounding knife completes its cutting stroke. After the rounding knife has penetrated the work it is eased back very slightly out of contact with the anvil l8, and at this time the rising slope on the cam I02 causes the feeding members to be positively moved through their return stroke into proximity to the flange I2 and presser foot 24. During this return movement of the feeding members, the work is gripped between the presser foot 24 and the flange [2 to hold the work against the thrust of the channeling knife which makes its cut at this time. The shoe is further supported against back feeding action by the rounding knife 16 which, because of the slow speed of its return stroke, is not disengaged from the work until after the return movement of the feeding members is completed.

Having described our invention what we claim as new and desire to protect by Letters Patent of the United States is:

1. In a rough rounding and channeling machine, a work rest and an anvil arranged to support continuously in the same plane the sole of a shoe to be rounded, a presser foot and a feed foot opposite to and cooperating with said work rest and anvil, respectively, to grip the sole, a channeling knife associated with said feed foot.

said anvil and feed foot being mounted to move together through alternate feeding and return strokes, means for urging said presser foot toward said work rest during the return stroke of said anvil to hold the work against the cutting action of the channeling knife, and a chopping knife cooperating with said anvil to trim the sole edge.

2. In a rough rounding and channeling machine, a work rest and an anvil having work engaging surfaces disposed in the same plane, a carrier for said anvil, a feed foot mounted to swing upon said carrier toward said anvil, means for constantly urging said feed foot toward said anvil, means for oscillating said carrier to cause said anvil and feed foot to be moved together toward and away from said Work rest through alternate feeding and return strokes, a channeling knife carried by said feed foot and arranged to make a channeling out during the return stroke of said anvil and feed foot, a presser foot cooperating with said work rest to hold the shoe against the cutting action of the channeling knife, means for relieving the pressure of said presser foot against the shoe during each feeding stroke of said anvil and feed foot, and a chopping knife cooperating with said anvil to trim the sole edge.

3. In a rough rounding and channeling machine, means for supporting the upper side of a sole to be rounded comprising a fixed work rest and an anvil movable laterally of said work rest through opposite feeding and return strokes, a feed foot arranged constantly to hold the shoe against said anvil, said feed foot also being arranged to move through opposite feeding and return strokes in synchronism with the anvil, a rounding knife operable between successive feeding and return strokes of said anvil to make a trimming cut through the sole against said anvil. a channeling knife carried by said feed foot and arranged to make a channeling cut during the return stroke of said feed foot, a presser foot cooperating with said work rest during the return stroke of said anvil and feed foot to support the shoe against the cutting action of the channeling knife, and means for moving said presser foot away from said work rest during each feeding stroke of said anvil and feed foot.

4. In a rough rounding and channeling machine, an anvil and a work rest arranged to support in a common plane the margin of a sole to be rounded, a knife cooperating with said anvil to trim the sole, a carrier for said anvil, said carrier being movable to cause said anvil to move toward and away from said work rest in said plane, a feed foot arranged to engage the bottom of the sole opposite to the anvil, a channeling knife associated with said feed foot and having a cutting edge directed toward said work rest, an arm on which said feed foot is mounted, said arm being mounted upon said carrier to swing toward and away from said anvil, means for yieldingly urging said arm and carrier away from said work rest to cause said anvil and feed foot to impart a feeding movement to the work, and cam-operated means for controlling the feeding movement of said anvil and feed foot, said cam-operated means being constructed and arranged to impart a positive return movement to said anvil and feed foot between successive feeding movements thereof.

5. In a rough rounding machine, an anvil and a work rest mounted and arranged to support continuously in the same plane, one side of a sole to be rounded, said anvil being mounted to swing in said plane through alternate feeding and return strokes, a feed foot cooperating with said anvil continuously to grip the sole, a rounding knife movable into engagement with said anvil between its feeding and return strokes to trim the sole, a presser foot mounted and arranged to hold the sole yieldingly against said work rest. and means for retracting said presser foot from the sole during the feeding stroke of said anvil.

6. In a rough rounding machine, means for supporting a shoe to be rounded comprising a work rest and an anvil the work-engaging surfaces of which are disposed at the same level, a chopping knife cooperating with said anvil to trim the sole edge, said work rest comprising a guide arranged to extend across said anvil and to position the shoe crosswise of said knife by engagement with a lateral surface of the shoe, a feed foot cooperating with said anvil to grip the sole continuously, said anvil and feed foot being mounted to oscillate together laterally of said work rest whereby a step-by-step feeding movement is imparted to the work, a presser foot cooperating with said work rest to grip the sole, and means for moving said presser foot away from said work rest during each feeding movement of the work.

7. In a rough rounding machine, feeding means comprising an anvil and a feed foot mounted for movement together about a common axis through alternate feeding and return strokes, means for urging said feed foot toward said anvil to cause a sole to be constantly gripped therebetween, a reciprocatory chopping knife arranged to trim the sole against said anvil, a stationary work rest having a flange arranged to engage the side of the sole engaged by said anvil, the work-engaging surfaces of said flange and anvil being disposed in the same plane, said work rest also comprising a guide extending across said anvil for positioning the shoe toward and away from said knife, a presser foot for yieldingly holding the sole against said flange, and means for moving said presser foot away from said flange during each feeding stroke of said feeding means.

8. In a rough rounding machine, feeding means comprising an anvil and a feed foot, a work rest comprising a flange and a guide arranged to extend across said anvil, said flange and anvil being arranged to project from said edge guide and to be inserted between the bottom of a shoe and the adjacent side of its sole, a carrier for said anvil, said carrier being movable in opposite directions to cause said anvil to move toward and away from said work rest, an arm upon which said feed foot is mounted, said arm being pivoted upon said carrier to permit said feed foot to swing toward said anvil, means for yieldingly urging said feed foot toward said anvil to cause the sole to be continuously gripped therebetween, a presser foot arranged to engage the bottom of the sole opposite to said work rest, and means acting upon said presser foot intermittently to cause it to grip the sole against said flange between successive feeding movements of said feeding means.

9. In a rough rounding and channeling machine, a work rest and an anvil arranged to support one side of the sole of a shoe at the same level, a presser foot and a feed foot mounted opposite to and arranged to cooperate with said Work rest and anvil, respectively, to grip the sole, said anvil and feed foot being mounted to move together through alternate feeding and return strokes, a channeling knife associated with said feed foot and arranged to cut during the return stroke thereof, a chopping knife cooperating with said anvil to trim the sole edge, a slide upon which said channeling knife and feed foot are mounted, said slide being movable crosswise of the edge of the knife to vary the position of the channel relatively to the sole edge, and means for adjusting said slide comprising a member yieldingly engaging said slide and mounted to move away therefrom to free said slide for removal from the machine.

10. In a rough rounding and channeling machine, a work rest and an anvil arranged to support one side of the sole of a shoe at the same level, a presser foot and a feed foot mounted opposite to and arranged to cooperate with said work rest and anvil, respectively, to grip the sole, said anvil and feed foot being mounted to move together through alternate feeding and return strokes, a channeling knife associated with said feed foot and arranged to cut during the return stroke thereof, a chopping knife cooperating with said anvil to trim the sole edge, a slide upon which said channeling knife and feed foot are mounted, said slide being movable crosswise of the edge of the knife to vary the position of the channel relatively to the sole edge, an operator controlled member for adjusting said slide, and tongue and groove connections between said member and slide for transmitting adjusting movement of said member to said slide, said member being mounted to swing away from said slide thereby to separate said connections and to free said slide for removal from the machine.

HAROLD ERNEST ELLIOTT. HAROLD JOHN GEORGE. ARTHUR ALAN RIVINGTON.

No references cited.

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