US1395765A - Welt grooving and beveling machine - Google Patents

Description

J. 0. PERKINS, WELT GROOVING AND BEVELING MACHINE.- APPLICATION FILED JULY 3.191

' 1,395,765. Patented m 1, 1921.

' 3 $HEETSSHEET I.

INVENTOR James O. Peri/m M/WGSLS ATTORNEY J. 0. PERKINS.

WELT GROOVING AND BEVELING MACHINE.

APPLICATION FILED JULY 3,1918.

Patented Nov. 1,1921.

3 SHEETS-SHEET 2.

- INVENTOR v I I g W M l ATTORNEY Jomas' 0. Perk/b6 I 1. 0, PERKINS. WELT GROOVING AND BEVELING MACHINE.

APPLICATION FILED .IULY 3.1918. I

1,395,765, Patented Nov. 1, 192 1;

3 SHEETS-SHEET 3.

INVENTOR Jamesa erflv'ns A TORNEY UNETE. stars JAMES O. PERKINS, 0F AUBURN, NEW' YQB-K, ASSIGNOR TO HAMEL SHOE MACHINERY COMPANY, A CORPORATION OF MASSACHUSETTS.

WELT GROOVING AND BEVELING MACHINE;

memes.

Specification of Letters Patent. Patented NOV. 1', 1921.

Application 4116a July 2', 1913. Serial Nb. 243,118.

To all whom it may concern Be it known that I, JAMns 0. PERKINS,

a citizen of the United'States, residing at Auburn, in the county of Cayuga'and Statein the manufacture of welt shoes and more specifically, to a machine employed in the preparation of the welt strip preparatory to sewing the same to the lasted insole and upper. I V

In accordance with the usual practice,a groove or channel is formed in the unfinished or flesh side of the welt near one edge thereof for the reception of the sewing stitches, and the finished side of the welt is beveled or chamfered adjacent the same edge to permit the welt to lie snugly against the upper along the line ofthe inner seam.

The present invention contemplates the provision of a machine forcarrying out the above operation which shall be more efficient than those at present commonly used, and which at the same time shall be compact and simple in structure and of relatively low cost of production.

The invention further consists in providinga grooving or channeling knife of such form and so mounted as to avoid choking or jamming of the chip therein.

Other and further objects and'advantages of the invention, together with new and improved details and combinations of partswill be hereinafter fully described and particularly pointed out in the claims, reference being had to the annexed drawings illustrating a preferred form thereof and in which,-

Figure 1' is a front elevation of the machine.

Fig. 2 is a transverse, vertical section through the machine on the line 24-2 of Fig. 1, but to enlarged scale.

. Fig. 3 is a horizontal section on the line 33 ofFig. 1 to enlarged scale.

Fig. 4 is a longitudinal, vertical. cross section through the axis of the feed rolls, illustrating details of construction.

Figs. 5 and 6 are details of the mounting for the grooving knife.

Fig. 7 is a sectional detail of the support for the beveling knife.

Fig. 8' is a vertical sectional detail longitudinally of drive shaft illustrating the clutch shifting mechanism.

Figs. 9 and 10 are elevational views of the cooperating cam elements of the clutchshifting mechanism, and v Fig. 11 is a view illustrating the appearance of a section of welt strip after being. operated upon by the machine.

1 is the frame or base member of the machine having projecting from its right-hand side an outstanding bracket 2. 1 and 1 indicate alined bearing members formed in the frame, a third bearing member 2 being formed in the outer extremity of the bracket '2, said bearing members being provided with journal openings in which is mounted, for rotation, a drive shaft 3 having loosely mounted thereon a drive pulley 4. Upon the hub of the drive pulley 4-at its righthand side is formed a clutch element 5' adapted for engagement. with a corresponding clutch element 6 formed upon a collar 7, fixed to the drive'shaft bymeans of a upon the side opposite the surface 12 with inclined cam faces 13, l3 ,-and with surfaces 14, 14 parallel to the surface 12. Said wedge member 11 is also provided with an opening 16 for the passage of the shaft 4 and with a second opening 15, the purpose of which will be hereinafter described. 17 (Fig. 10) is a second wedge member arranged for cooperation with the Wedge member 11 said second member being provided with cam faces 18, 18 corresponding to the faces 13, 13 of member 11 and with surfaces 19, 19 parallel to the surfaces 14, 14

7 block 31-.

. infthe block 31 with which engages the end" of the member 11. The wedge member 17 is likewise provided with an opening 20 for reception of the shaft 4, said opening, however, being elongated, as clearly shown in Fig. 10, to permit movement of said member 17 transversely of the shaft. The opening 20 is extended at its opposite ends forming narrowed portions 21, 22. Projecting from the right-hand extremity of the bearing member 1 are a pair of pins 23, 24, the pin 23 being positioned within the extension 21' of the opening 20 of wedge member 17, while pin 24 projects through the extension '22 of. the opening 20 and into the opening 15 of the wedge member 11. The pins 23 and 24 thus serve to prevent rotation of the wedge members with the shaft, but by reason of the shape of the opening 20 permit" movement of the wedge member 17 transversely ofthe shaft. WVedge member 17 is .also provided with a band member 25 projecting forwardly therefrom .for convenient manipulation by the operator.

lnthe operation of this portion of the de vice, when it becornes desirable to start the drive shaft into operation, the operator draws the hand member 25 forwardly, there- 7 by through the coaction of the wedge mem- I Fixed upon the shaft 4 to the left of the bearing member 1 is a gear 26 having engagement with a gear 27 (Fig. .4), fixed uponra shaft 28 having hearings in bosses 29, 30 formed upon theopposite sides of a The block 31 is guided for verti'cal adjustment within'slots 32, 33 formed in frame members 34, 35 projecting upwardly from the main frame of the machine. 36 is a screw-threaded opening formed withof a screw threaded rod 37, said rod being mounted for free rotation in a boss 39 at the central portion of a U-shaped bracket secured upon the upper ends of the members 34, 35. .The'upper extremity of the rod 37 is provided with a hand wheel 40, by which the rod may be rotated. 42 is a compression spring surrounding the rod 37 and having one end bearing upon the lower surface of the boss39, and having its other end in engagement with a nut 41 located upon the rod 37. If desired, a locking nut 41' may be provided for securing the nut 41 in adj usted position.

Within the block 31 is formed a chamber 43 (Fig. 4), and fixed upon the shaft 28 within this chamber is a knurled feed wheel 44. The feed wheel 44 near one end thereof is grooved, as shown at 45, to receive the end of the grooving knife and theend face of said feed wheel adjacent the groove is beveled, as indicated at 46. Fixed upon the shaft 3 for coperation with the feed wheel 44 is a second feed wheel 47 of larger diameter than wheel 44, it being noted,how ever, that the gear wheels 26 and 27 are of different diameters, the arrangement of parts being such that the surface speedof the two feed wheels-44 and '47 is the same. It may also bestated that the engaging teeth ofthe gear wheels 26 and 27 are so formed as to permit such slight vertical adjustment of the block 31, by means of hand wheel 40 V and spring 42, as may be necessary for properly positioning the feed wheels 44and 47 with respect to each other. wheel 47 upon that end thereof corresponding to the beveled endof wheel 44 is channeled out, as indicated at 48, the outer circumferential wall of said channel being beveled or inclined, as shown at 49,'the'reby forming in effect a flange outstanding from the face of the wheel and meeting theci'rcumferential surface of the wheel at an acute angle,as.shown at 50. The effect of this arrangement isto give the end of the wheel a dished-out appearance, as may be" seen by reference to Fig. 2.

Mounted upon the front face of the member 34 is a bracket 51, said bracket provid- The feed inga guideway 52, in which is mounted for horizontal adjustment a block 53. 54 is an adjusting screw rotatable within the bracket 51 but prevented from longitudinal movement withrespect thereto, said screw having threaded engagement with the block 53, and serving to adjust the same. 55 is a set. screw engaging a threaded opening in bracket 51 and located within a slot in the block 53 forfixingthe same in adjusted position. integral with'the .block 53, said support be ing providedwith an opening 57 serving for thereception of a knife member 58.

is a screwthreaded opening formedwithin the support 56 and intersecting the opening 57 at an acute angle, said opening 59 being arranged for the reception of a set' screw 60. It will be clearly apparent from inspection of Fig. 7 that by loosening the'screw 60' the blade 58 may be adjusted within the opening 57, and that. upon again tightening the screw, the latter, by a wedge action against the knife member 58, will serve to hold the latter in adjusted position. The knife n1emher is provided at its extremitywith ablade having a substantially straight edge portion 61.

Mounted upon the member 34. at a point 56 is a support attachedto, or

slightly above brac'ket51, is a second bracket the above arrangement, upon loosening the 62, said bracket having slidably mounted thereon a block 63. The block 63 may be adjusted vertically with respect to bracket 62 bymeans of a screw 64 operating in a manner similar to the screw 54 hereinbefore described; 65 is a'set screw passing through a slot in the bracket 62 and engaging the block 63 for fixing the latter in adjusted position. Upon the lower extremity of the block 63 is a support 66 having an inclined surface 67, in which is formed a slot or channel for the reception of a channeling knife 68. This knife is of substantially U- shape in cross section, and of uniform cross section from end to end, and is sharpened at its extremity as shown at 68 to form a cutting blade. 69 is a plate fixedly mounted upon the surface 67 as by means of screws 70 and forming an outwardly projecting lip extending over the edge of the channel or groove and overlying one edge 71 of the channeling knife 68, said plate, however, being so arranged as to leave the channel in said channeling knife entirely unobstructed, thereby permitting the chip cut by said knife to move freely outwardtherefrom at any point at the length of the blade. 72 is a screw-threaded opening iformed in the support 66 and arranged to intersect the groove or channel in said support at an acute angle, a set screw 73 being mounted within the opening 72 for adjustably wedging the channeling knife in adjusted position. In placing the channeling knife in position, it is slipped under the edge of the plate 69, the screw 73 first being retracted and when properly located the screw, 73 is tightened to wedge the knife against said plate 69, thereby securing it firmly in adjusted position.

Upon the frame of the machine in the rear side thereof is formed a work support at 74 having a fiat upper surface arranged in a plane substantially tangential to the top of the feed wheel 47. 75 and 76- indicate a pair of relatively adjustable work-' guiding members, mounted upon .the upper surface of the support 74, said guiding members being provided with forwardly extending fingers 77, 78 which are sufficiently thin in a vertical direction to permit them to lie between the work-engaging rolls without being gripped by the latter. The guide members 75, 76 are provided with oppositely extending foot portions 79, 80, respectively, said foot portions being slotted for the re ception of set screws 81, 82 engaging within suitable threaded openings in the work support 74. 83 is a thumb screw having threaded engagement with an opening 85 in the guide member 76 and being freely rotatablein an opening 84- in the guide member 75, but being restrained from longitudinal movement with respect to the latter. By

set screws 81,82, the position of the combined guiding device formed by the members 7'5, 76 may be adjusted with respect to the cutting tools, and by manipulation of the screw 83, the relative position of the guides 75, 76 may be changed for coeperation with welt strips of different widths.

Upon proper adjustment of said guides, they may be again fixed in position by means-of the setscrews 81, 83. I

As will be noted from inspection of Fig. 11, the welt strip W which, as supplied by the manufacturer is of substantially rectangular outline, is by passage through this machine, provided on its flesh or unfinished surface 86 with a semi-circular groove 87, and upon its finished surface opposite the groove 87 with a beveled portion 88, the purpose of this groove and beveled portion being to facilitate the sewing of the welt to the shoe.' As clearly indicated in Fig. 4 the beveling knife 58 is so arranged that the cutting edge of' its blade lies substantially parallel to the beveled surface 49 formed within the channeled edge of the feed wheel 47, and by reason of this channeled or dished formation of said feed wheel the knife 58 may be so adjusted that the work-engaging surface of wheel 47 overlaps the edge of the same. The knife .edge also extends beyond the work-engaging surface of the feed wheel 44 and lies closely adjacent the beveled surface 46 of said wheel. As the chip cut by the beveling knife tends to curl in a downward direction there would be some tendency to clog the channel in the end of wheel 47 were the wheel of small diameter and to avoid this difficulty the lower feed wheel has been made of larger diameter than is customary, in order to permit of as extensive a channel space as is necessary to secure freedom from jamming of the chips therein. The above construction permits the knife to secure a clean and perfect cutting action on the welt material, maliing the jamming or clogging of the chips cut therefrom between the knife and feed wheels highly improbable.

In the operation ofthe device above described, the operator, having started the drive shaft in rotation by manipulation of the hand member 25 as above described, will insert the end of the welt strip between the guides 75, 76, to a point at which it is gripped between the rotating feed rolls 44 and 47, whereupon the machine operates to feed the work against the cutting edges of the channeling knife 68, and the beveling knife 58, thereby producing results clearly shown in Fig. 11. For operation upon welts of greater or less thickness, the hand wheel 40 will be suitably manipulated to properly position the feed rolls with relation to each other. The above arrangement of parts is found in practice to secure more uniform results than can be attained with many machines at present in use, the various adjustments permitting the machine to operate on welts with different widths or thicknesses with equal facility, while at the same time permitting the position and degree of the grooving and beveling to be fixed with the greatest nicety.

It is to be understood, however, that except as defined in the claims the invention herein disclosed is not to be limited to the specific embodiment herein described and illustrated, but that the invention may be embodied in modified forms and arrangements of parts without departing from the essential characteristics thereof.

Having thus described the invention and a preferred embodiment of the same what I claim and desire to secure by Letters Patent of the United States'is,

1. In a device for operating upon welts, a support provided with, a guide opening therein, a detachable plate on said support projecting partly across said opening, a knife seated within said opening and under the projecting portion of said plate, and a screw mounted for adjustment within said support and arranged to intersect said openmg at an acute angle whereby sald screw in the opening and against the projecting portion of said plate.

2. In a leather grooving device, a support" having an open channel in one face thereof,

a grooving tool of substantially U shape-in cross section seated in said channel, a plate fixed to said support andv extending over the edge of said channel and overlying one edge of saidtool, and a screw passing through one face of said support and in,- clined toward said tool for clamping said tool in said channel against said plate. I

3. In a leather grooving device, a support provided with an open channel in one face thereof, a grooving tool of substantially U- shape in cross section seated in said channel, a plate fixed to said support and extending over the edge of said channel and over-lying one edge of said tool, and a screw mounted for adjustment within said support and arranged to intersect said channel at an acute 7 angle whereby said screw serves to adjustably wedge said knife within said channel and against the over-lying portion of said plate.

In testimony whereof, I have signed my name to this specification.

JAMES OJPERKINS,

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