US2125959A - Cutting machine - Google Patents

Description

Aug. 9, 193s. l T, H, SEELY 2,125,959

CUTTING MACHINE Filed Sept. 30, 1936 2 Sheets-Sheet l 00 /V VEN TUE' Aug. 9, 193s. T. H. SEELY, l 2,125,959

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INIHHHIHIIH l" JHHHIHHI iwi-NTD@ @8% Patented Aug. 9, 1938 UNITED STATES CUTTING MACHINE Thomas H. Seely, Melrose, Mass., assigner to United Shoe Machinery Corporation, Paterson, N. J., a corporation of New Jersey Application September 30, 1936, Serial No. 103,399

12 Claims.

This invention relates to cutting machines and is herein illustrated as embodied in `a machine for making a cut in a locality in the shank porl tion of a sole which is designed to be used in to the adjacent upper, said shank portion having substantially no tendency to contract and thereby cause said edges to separate from said upper. In carrying out the method, use is made of a sole having in its shank portionl a longitudinal gouge and a flap or tongue which is the counterpart of the gouge and is hinged to the sole along one edge of the gouge, the illustrated machine being particularly designed to produce such a tongueand gouge in a sole or other piece of sheet material.

According to one feature of the invention, there are provided a knife and a pair of feed rolls shaped to distort the blank by forming a bulge in it and arranged to feed it to the knife in such manner that one end of the edge of the knife enters the blank, remains in it until the gouge and tongue are substantially completed and then emerges from the blank, the vother end of the edge of the knife being maintained at all times outside the blank. Y

It is desirable to provide means for properly presenting a blank to the rolls. To this end, ac- Y cording to another feature of the invention, a feed table which presents the blank to the rolls is provided with a pair of gages which .are normally open to receive a blank between them, are closed by the depression of the starting treadle of the machine and locked in closed position, and are unlocked after the rolls have gripped the blank.

These and other features of the invention including certain details of construction and combinations of parts will be described as embodied in an illustrated machine and pointed out in the appended claims.

Referring to the accompanying drawings:

Fig. 1 is a side elevation of a machine in which the present invention is embodied;

Fig. 2 is a perspective of a sole after it has l been operated upon;

Fig. 3 is a plan view of a portion of the machine showing in dot-and-dash lines a sole in the position which it occupies before the gages close upon it;

Fig. 4 is a vertical section through the workengaging parts of the machine showing a sole |00 in the same position in which it is shown in Fig. 3;

Fig. 5 is a section similar to Fig. 4 but showing the sole in process of being operated upon;

Fig. 6 is a section on the line VI-VI of Fig. 1 showing more particularly the mounting of the slide member or trip which releases the pawl 93;

Fig. 7 is a front elevation of portions of the two feed rolls showing in section a sole being operated upon;

Fig. 8 is a section on the line VIII-VIII of Fig. 3 showing only the top of the table, the adjustable block and the stem of the end gage which is slidable in this block; and

Fig. 9 is a detail in elevation showing the mounting of the slide member or trip |01 and its relation to the upper end of the push rod 103.

The general construction of the machine is like that of the machine of United States Letters Patent No. 1,382,689, granted June 28, 1921, upon an application filed in the name of William C. Stewart; and before describing the new construction, the old construction will be briey described. Located near the front of the machine (the lefthand end as Viewed in Fig. 1) are two rolls Il and I3 the shapes of which diier from those of the patented machine, since the present machine is designed to produce a weakened locality in the shank of the sole I00 by forming a gouge 200 and a flap 309, while the patented machine is designed to skive the opposite edges of the shank portions of soles. These rolls are brought to rest, as shown in Fig. 4, with a gap between them. The operator thrusts a sole, heel end foremost, between the rolls until the heel end of the sole contacts with a gage l5 the stem of which is longitudinally adjustable in a slot I1 (Fig. 3) in a block I9 which is adjustable toward and from the rolls and may be so adjusted by turning a hand wheel 2l located at the front of the machine.

The block i9 (Figs. 1, 8) is adjustably mounted tact with the heel-end gage l5, a treadle 21 (Fig.

l) is depressed, whereupon the rolls start to rotate in the directions indicated in Fig. 4, and the links 25 are swung tothe left (Fig. 1) carrying with them the table 23 upon which the rear part of the sole rests. The table, which moves in timed relation with the rotation of the rolls, continues its movement to the left until the rolls have properly gripped the sole and is then returned by the links to the position shown. The rolls continue their rotation thus causing the sole to be cut by the stationary knife 28 (Figs. Y

1, As thus far described, with the exception of the shapes of the rolls and I3 and the block |13, the machine is or may be the same as the patented machine to which reference is made for details of construction not herein shown and described.

In order to center the sole, that is to locate it properly widthwise, after it has been located properly lengthwise by having its heel end thrust against the heel-end gage l5, two pairs of centering edge gages are provided, one pair 29, 30, which engages the edge of the sole |05 ahead of the heelbreast line, will be referred to as shank gages; and the other pair 3 :33, which engages the edges of the sole near the heel end, will be referred to as heel gages. The-shank gage 29 and the heel gage 3l are pivoted about the smooth upper portion of a screw 35, the reduced lower end of which is threaded into a threaded hole 31 (Fig. 8) vin an ear on the block I9. The shank gage 3|! and the heel gage 33 are pivoted about Vthe smooth po-rtion of a similar screw 39 the lower reduced end of which is threaded into a threaded hole 4| in another ear of the block I9. 'Ihe shank gages 29, 30 have respectively rear extensions 43, vl5 which terminate in interengaging toothed segments 41, 49, so that the shank gages'are compelled to swing equallyin opposite directions. The heel gages 3|, 33 have similar extensions which lie directly below the extensions 43, 45 and terminate in interengaging 'toothed segments which lie directly below the segments 43, 45. The extension 43 of thefshank gage .29 is connected by a link 5| to'one end of a whillletree 53 which `is pivoted at its middle at 55 to one end of a short link 51. A tension spring 6| connecting the pivot 63 of the link 5| with a short arm on the shank gage 29 lnormally holds the shank gages 29, 3!)

in the open position shown. A link65 is: pivoted at one end to the extension of the heel gage 33 and at the other end at 61 to the other end of the whiiletree 53; and a tension spring 69, connected at one end to the pivot S1 and at the other end to an arm on the gage-33 normally holds the gages 3|, 33 in the open position shown. The short link 51 at its right-hand end is pivoted -about a horizontal pin 1| carried by the arms of a fork at the upper end of the upright arm of a bellcrank lever 13 pivoted at 15 to a bar 11. The inner end of this bar is rabbeted and fastened tothe block I9 by cap-screws 19. To the substantially horizontal arm of the bell-crank lever 13 is fastenedthe upper end of -a two-part chain 8| the'lower end of which is fastened to the treadle 21. The two parts ofthe chain are-connected by a tension spring 85. When the treadle is depressed it exerts a pull Yon the chain and also pulls down va link 81 having a. slot 88 in its upper end in which is .received a pin 89. The rst part of the downward movement of the treadle swings the bell-crank lever to pull the link 51 to the right and close the two pairs of gages on the sole, thereby centering the sole. All this takes place before the upperend of the slot 88 encounters the'pin 89. Further Adownward movement of the treadlestarts the machine through mechanism disclosed in the patent to Stewart referred to above.

Referring to Fig. 3, it will be seen that pulling the link 51 to the right will cause the two pairs of gages to close on the sole and that when the link 51 is released the springs 5|, 69 will open the gages once more. In starting the machine the treadle is depressed and then released. In order to ensure that the gages shall remain in engagement with the sole until the table 23 has moved forward far enough so that the rolls il, I3 have gripped the sole, there is pivoted at 9| to the righthand end of the horizontal arm of the bell-crank lever 13 the lower end of a pawl 93 having a tooth which is held in engagement by a tension spring 99 with one or another of the teeth 91 of a rack formed on the right-hand end of the bar 11, the spring being attached at one end to the pawl 93 and at the other to the bell-crank lever 13. When the treadle is depressed, and the bell-crank lever 13 is swung clockwise, as viewed in Fig. l, the pairs of edge gages are closed upon the sole and the springs 3i, 59 are stretched. The pawl 93, however, prevents these springs from returning .the parts to the positions shown in which the gages are open. It is necessary to release the pawl before the completion of a cycle of operations of the machine so that the gages will once more be open to receive the next sole. To this end use is made of the swinging to the left of the right-'hand one of the links 25 upon the upper ends of which the table 23 is pivoted. An extension or tail is provided on the lower end of the right-hand link 25 which appears in Fig. 1, and to it is pivoted at IBI the lower end of a Vtwo-part push rod |03 the two parts of which are adjustably fastened together by two screw-and-slot connections I E5 so that the length of the rod may be varied. Upward movement of the push rod |03 actuates a slide member to release the pawl 93 and thereby permit the two pairs of gages to open. Referring to Figs. 6 and 9, this slide member or trip |01 has a slot |59 in its left-hand end to receive the pin 15 about which the bell-crank lever 13 is pivoted, and a second slot in its righthand end to receive the smooth portion of the stem of a screw H3 which extends through the slot and yis threaded into that part of the bar 11 on which the teeth 91 are formed. The slide member or trip has formed upon it a small projection IE5 which is engaged by the top of the push Vrod |33 when .the rod is moved up, such engagement causing the trip |51 to slide to the right so as to push the pawl 93 away from the teeth 51 and permit the bell-crank lever 13 and the pawl 93 to return to the positions shown. The construction and arrangement of parts is such that the pawl 93 holds the two pairs of gages in contact with the sole until the rolls II, I3 have firmly gripped the sole, after which the pawl is pushed out of engagement with the teeth 91 and returns to the position shown. At the same time the tension springs 6|, 69 open the two pairs of gages to position them to receive another sole.

Referring now to Fig. 2, the gouge 250 and flap or tongue 38D are produced by distorting the shank portion of the sole and feeding it past a stationary straight edged knife in such manner that the knife enters one face of the sole at the line ||1 and emerges from it lat the line IIS, the knife in forming the gouge cutting along the line |2|, thereby leaving the tongue l3BE! hinged Vto the sole along one edge of the gouge in anarrow locality parallel to the line 2|. To this end, the lower roll (Fig. '1) is provided with spaced toothed disks |23 (Fig. '1), the two disks at each end of the roll being of comparatively large diits heel end contacts with the end gage i5.

ameter, and the six middle disks being of smaller diameter so that in effect a depression or sort of matrix is formed by their peripheries; and into this matrix or depression the shank portion of the sole |03 isbent by a suitably shaped projection or patrix 25 on the other roll I3. The right-hand end edge |21 of the knife 2G is outside of the sole and is cutting along the. line |2| of Fig. 2. The left-hand` end of the edge of the knife is within the sole so that, when the cut is finished, the flap or tongue 300 will remain at-` tached to the sole. The stem of the knife 23 (Fig. 3) Vextends obliquely to the axes of the rolls il, I3 and is adjustably fastened to a block |29 by cap screws |3| which pass through slots in the knife stemvand are threaded into the block. i The block has in its under side a groove which is parallel to the axes of the rolls li, i3; and in this groove is received the upper part of a key |33 the lower part of which is received in a groove |35 in a wide bar |31 fastened by cap screws, one of which'is shown at |39, to thev frame of the machine. A clamping screw Mi extends up through an enlarged hole |43 in the bar, through a hole in the key |33Vand is threaded into the lower side ofthe block |23. The head of this clamping screw |4| appears in Fig. 1. With this construction, after the cap screws |3| have been loosened, the knife may be adjusted obliquely to bring its cutting edge |21 into the desired position back of the bite of the rolls; and, after the clamping screw Mi has been loosened, the knife may be adjusted in a' path parallel to the axes of the rolls. In order to asn sist in properly replacing the knife (for example, after it has been removed and sharpened) a gage |45 pivoted at its rear end to the bar |31 has at itsv forward end a hook to engage the point at one end of the edge |21 of the knife 23. As

4d, soon as the knife has been replaced and properly adjusted, this gage is swung out of the way. It may be noted (Fig. 3) that the cutting edge of the knife and one edge of the stem of the knife intersect at an acute angle to form a point at one end of the cutting edge of the knife.

In order to assist in holding the sole up against the patrix roll I3, a series of spring-pressed nngers |131 (six being shown) are provided, the operative ends of which are located in grooves between the toothed disks |23 of the lower roll. 'I'hese fingers are pivoted about a stationary horizontal rod |49 and have downwardly extending stems which are normally held against a stationary rod |5| (Fig. 1) by tension springs one of which is shown at |53. When the sole is being operated upon (Fig. 5) these fingers press the sole upwardly against the roll I3.

The operation of the machine is as follows. With the parts of the machine in the positions of rest shown in Figs. 1 and 3, the operator thrusts a sole lll through the gap between the rolls until He thereupon depresses and then releases the treadle 21. The rst part of the downward movement i of the treadle swings the bell-crank lever 13 clockwise thereby causing the shank gages 23, 3|] and the heel gages 3|, 33 to close upon the sole. During this downward movement, the tooth of the pawl 93 runs over the teeth 91 of the stationary rack and holds the gages in closed` position. The latter part of the downward movement of the treadle 21, through the link 81, starts the machine. The links 25 swing to the left, as viewed in Fig. 1, to move the table 23 to the left in timed relation to the rotation of the rolls and thereby present the sole properly to the rolls I3. As soon as the rolls have properly gripped the sole, the table 23 returns to the position shown. During the forward movement of the table, when the links 25 swing to the left, the tail of. the left-hand link 25 moves the push rod |33 up. The upper end of this rod (Fig. 9) encounters the projection ||5 of the slide member |01 and moves this member to the right, thereby disengaging the` pawl 93 from; the teeth 91 and permitting the pairs of gages to be opened once more by the springs 6|, 69. It will be noted, by reference to Fig. '7, that the point at one end of the edge of the knife |21 enters one face of the sole while said sole is distorted, remains in the sole for an interval and then emerges from the sole, but that the other end of the edge lof the knife remains at all times entirely outside of the sole. The result is the production of the gouge 20G (Fig. 2) and the tongue 30|] which is hinged to the sole along one edge of the gouge. In order to ensure that the sole shall be fed out from between the ro-lls after the gouge and the tongue have been produced, the upper roll i3 is provided with two ears, one of which is shown at |55 in Fig. 4. These ears engage the top of the sole and hold it against the lower roll.

Although the invention has been set forth as embodied in a particular machine, it should be understood that the invention is not limited in the scope of its application to the particular machine which has been shown and described.

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

1. A machine for forming upon a piece of sheet material a gouge and a tongue which is hinged to the material along one edge of the gouge having, in combination, a pair of feed rolls and a knife to which the rolls feed the material, said rolls being Ashaped to form a bulge in the material and to feed the bulged portion to the knife in such manner that one end of the edge of the knife enters one face of the material, remains in the material for an interval and then emerges from said face, and the other end of the edge of the knife remains at all times outside of the material.

2. A machine for forming upon a piece of sheet material a gouge and a tongue which is hinged to the material along one edge of the gouge having, in combination, a pair of feed rolls, and a straight-edged knife to which the rolls feed the material, said rolls being shaped to form a bulge in the material and to feed the bulged portion to the knife in such manner that one end of the edge of the knife enters one face of the material, remains in the material for an interval and then emerges from said face, and the other end of the edge of the knife remains at all times outside of the material.

3. A machine for forming upon a piece of sheet material a gouge and a tongue which is hinged to the material along one edge of the gouge having, in combination, a pair of feed rolls, and a straight-edged knife, said knife having a cutting edge which is substantially parallel to the axes of the rolls and a stem which extends obliquely to the cutting edge, one edge of the stem enclosing with the cutting edge of the knife an acute angle to form a point at one end of said cutting edge, said rolls being shaped to form a bulge in the piece and feed it to the knife in such manner that the point at one end of the cutting edge enters one face of the material, remains in the material for an interval and then emerges therefrom, and the other end of the edge of the knife remains at all times outside `of the material.

4. A machine for forming upon a piece of sheet material a gouge and a tongue Which is hinged to the material along one edge of the gouge having, in combination, a knife and a pair of rolls for feeding the material to the knife, one of said rolls having a projection and the other roll having spaced toothed disks of different diameters to provide a depression into which the projection on the other roll bends the material to form a bulge therein.

5. A machine for forming upon a piece of sheet material a gouge and a tongue which is hinged to the material along one edge of the gouge having, in combination, a knife and a pair` of rolls for feeding the material to the knife, one of said rolls having a projection and the other roll having spaced toothed disks of different diameters to provide a depression into which the projection on the other roll bends the material to form a bulge therein, one end of the edge of the knife being located to enter the bulge, to remain spaced from the surface of the material for an interval and then to emerge from the surface, the other end of the edge of the knife remaining at all times outside of the material.

6. A machine for operating upon a vblank having, in combination, a knife, a pair of rolls for feeding the blank past the knife, a table movable toward and from the rolls to present the blank to the rolls, a pair of gages mounted on the table, said gages being normally open when the table is at rest, a treadle manipulation of which closes the gages on the blank and locks them in closed position and then starts the machine, and means becoming operative'after the rolls have gripped the blank for unlocking the gages and permitting them to open preparatory to receiving another blank.

'7. A machine for operating upon a blank having, in combination, a knife, a pair of rolls for feeding the blank past the knife, a table movable toward and from the rolls to present the blank to the rolls, a pair of gages mounted on the table, said gages being normally open when the table is at rest, a treadle manipulation of which closes the gages on the blank and locks them in closed position and then starts the machine, and means becoming operative after the rolls have gripped the blank and While the table is moving toward the-rolls for unlocking the gages and permitting them to open preparatory to receiving another blank.

8. A machine for operating upon a blank having, in combination, a knife, a pair of rolls for feeding the blank to the knife, a table for presenting the blank to the rolls, said table being normally in retracted position, a pair of gages for engaging a blank placed on the table, yielding means tending at all times to hold the gages open, treadle-controlled means for closing the gages on the blank and locking them in closed position, and means becoming operative while the rolls are feeding the blank for unlocking the gages.

9. A machine 'for `operating upon a blank having, in combination, a knife, a pair of rolls for feeding the blank to the knife, a table for presenting the blank to the knife, a pair of gages pivoted on the table for equal movement in opposite directions, yielding means normally holding the gages open, a member movement of which closes the gages in opposition to the force of the yielding means, means for moving the member into a position to close the gages, a pawl for locking the member in its changed position, and means becoming operative during the operation of the machine for tripping the pawl to release the member and permit the gages to open.

10. A machine for operating upon a blank having, in combination, a pair of rolls having when at rest a gap between them through which the blank may be thrust in one direction, a knife past which the blank is fed in the other direction when the rolls are rotated, a pair of separable gages located on the opposite side of the rolls from the knife and adapted to receive the blank between them, means acting when the machine is at rest to hold the gages open, a table upon which the gages are mounted, means for causing the table to move toward the rolls to present the blank properly to the rolls and then to return to initial position, an operator-controlled member manipulation of which rst closes the gages on the blank and locks them in closed position and then causes the Vmachine to operate, and means for becoming operative after the rolls have gripped the blank for unlocking the gages and permitting them to open preparatory to receiving another blank.

11. A machine for operating upon a blank having, in combination, a pair of rolls having when at rest a gap between them through which the blank may be thrust in one direction, a knife past which the blank is fed in the other direction When the rolls are rotated, a pair of separable gages on the opposite sidesr of the rolls from the knife and adapted to receive the blank between them, yielding means acting when the machine is at rest to hold the gages open, a treadle manipulation of which starts the machine, closes the gages and locks them in closed position, and means becoming operative during the operation of lthe machine for unlocking the gages.

12. A machine for forming upon a piece of sheet material a gouge and a tongue which is hinged to the material along one edge of the gouge having, in combination, a pair of feed rolls shaped to distort the material, the axes of said rolls being parallel, a knife for cutting the material While it is distorted, said knife having a cutting edge which is parallel to the axes of the rolls and a stem which is oblique to said cutting edge, and means for mounting the knife for adjustment in two paths one of which is parallel to the edge of the knife and the other of which is oblique to said edge.

THOMAS H. SEELY.

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