US1596496A - Work-feeding mechanism - Google Patents

Description

Aug. 17 1926.

E. E. LANE WORK FEEDING MECHANISM Filed Oct. 20

mere-n srraras ELMER L NE, FDANVERe.MA SAQEI I ,A S Q Q T HARRY BEC WH or ,BROQKLINE, MassAoHUsnr'rs. Y

WORK-BEEDlNG EeHA vrsM.

Application {iled October 20,1921. Serial No. 508,995.

Ihis invention relates to Work feeding mechanisms having been designed more particularly .i'or skiving machines, though all or certain features "thereof mightbe found desirable in connection with machines for different purposes.

In such feeding mechanisms a series of narrow toothed wheels is sometimes employed for engaging the worln the edges of the teeth extendingparallel to the axis of the wheels. hen this construction isemployed for machines for skiving shoe stitiener parts such as are now commonly made of a felt composition impregnated with materials which soften under the influence of heat and which areigenerally friable, it is found that these wheels break oii particles from the edge or" the'chip removed by theskiving knife, and that instead of passing out of the machin withgthe chip they often pass along with the blank. During the further treatment of the blanks within the machines these particles often stick to the face thereof and become partially incorporated therein forming projections whichmust be removed before incorporation into the shoe to prevent them from showing through the upper, especially when he lighter grades of upper leather are employed. For this reason ,much time and attention is required to inspect the 'skived blanks and remove these particles and often they are not detected. until, they have been incorporated in the shoe. 1

Onefeature oi the present invention, therefore relates to a construction oftoothed ieed wheel which does not cause the break ing off of such particles.

A further undesirable characteristic of the usual toothed wheels above mentioned is that as they are used the spaces between the teethbecome clogged with matter from tne material ted causing them to act more :inc more as solid faced wheels, decreasing :lir eii'ective hold on thework and neces- :ting frequent adjustments ot'the operarts oithe-machinefor proper operurthcr ieature-of the invention relates a construction wherebyth'e wheels shall seltcleanmgso that'the r. action shall be substantially uniform at all times and frequent adjustments of the machine shall not be required.

(Jo-operating with the feed roll which car ies a plurality of these toothed wheels a recessed matrice roll is employed, the recess in the roll defining the portion of the blank to be removed in the skiving operation. This invention further contemplates a novel construction by which the relative angular position of the recess maybe adjusted so that the cooperating rolls may cause the blanks to be properly presented to the skivingkniife. i

Further objects andadvantageous details and combinations or" parts wilf'appear a. more complete description of an embojdi ment of thisinvention shown. in thef'a'cco'mpanying drawings in which i 77 Figure 1 is a vertical detail view partly in section of the feeding mechanism.

FigureQ is a plan of one of thefeed disks or wheels formerly usedf 5 Figure is an edge view of the same.

Figures t and {5 are views similar to FiguresQ and 3, but showing the improved form of disk. 7 7

Figure 6 is a somewhat diagrammatic detail or a pair of adjacent teed-teeth of the improvedform.

Figure 7 is a diagrammatic}section on line? of Figure 6.

FignresS "and 9 are plan views of the chip skived from a box toe stiffener .bglank when using the feed disks of Figures Zand 4:, respectively. v

' Referring to Figure 1 at A is indicated a matrice roll and at B a feed roll cooperating therewith tofeed the work to a 's'kivingknife (not shown). The matrice roll A comprises a sleeve 1 recessed as shown at 2 to determine the shape-and eglgtent of material to be 'skived therefrom, the material being pressed against the roll and into the recess in a manner well known to those skilled in the art.

In alinement with the sleeve 1 are sleeves 3 and 4 jonrnaled in fixed bearings 5 and 6 on the machine frame. -The sleeves- 1,3, and 4 are held for simultaneous rotation by keys 7 positioned in one of these sleeves,

' wheel or gear 13 herein shown as sleeve 1 interfitting grooves in the ends of the sleeves 3 and 4:. All these sleeves might be made integral, if desired, but as it is some times desirable to use recessed portions of dinerentcontours and depths it is desirable for the sake of economy to make these sleeves separate.

Outwardly of the hearing 5 sleeve 8 is shown as provided with a pinion 8 fixed thereto for a purpose immaterial to this in-- vention, and outwardly of this pinion is a collar 9 having a series of circumferential graduations or index marks as shown at 10.

This collar is fixed to rotate with the sleeve 3. Cooperating with the inde marks is a pointer 11 fixed at one end to the bearing 5. The sleeve 4, outwardly of the bearing is shouldered as at 12, and journaled outwardly of this shoulder thereon is a driving .11 either side of this gear are placed friction washers composed of fiber or other suitable material 14 and metallic collars or rings 15, the inner ring 15 aoutting against the shoulder 12.

A bolt 16 having a head 17 at one end is I passed through the various sleeves which are loosely mounted thereon, and adjacent the outer ring 15 is positioned a washer 18 bearing thereagainst. This end of the bolt 16 is threaded at 19 for the reception of a nut 20. By tightening up this nut the washer 18 is moved to clamp the rings 15, washers 14 and gear 13 against the shoulder 12, and to fix all these parts for simultaneous rotation with the sleeves 1, 3, and at. These sleeves are designed to be rotated by means of a gear (not shown) meshing with the gear 13. Consequently the gear 13 is angu larly fixed relative to the operative mechanisms of the machine. If it is desired to adjust the position of the r cess 2 angularly it is only necessary to loosen the nut 20 and turn the sleeves the required distance which may be estimated by noting the divisions on the index 10 which pass the point 11. When the parts are in adjusted position, by tightening the nut 20 they are fixed to rotate in unison.

The feed roll B, between which and the roll A the work is passed, comprises sleeves 30 and 31 journaled in bearings 32 and parallel to the bearings 5 and 6, a bolt passing theret-hrough having a head at one end and a nut 36 threaded on its opposite end. As shown this bolt is connected in the sleeve 31 in a similar manner to the bolt 16 and the sleeve 4, although this specific connection is immaterial to this roll since no rotative adjustment thereof is necessary. interposed between the inner ends of the sleeves 30 and 31 and keyed to rotate therewith is a series of toothed feed wheels comprising thin disks spaced apart by means of washers 26 placed there-between, washers 37 having keys 38 fitting corresponding ways in the ends of the sleeves and 31 being employed to lock the parts for simultaneous rotation.

The type of feed disk or wheel which has been commonly used in similar locations in other machines is that shown in Figures 2 and 3, in which each of the wheels or disks as 25 has a series of peripheral teeth 40 having their edges extending parallel to the axis of the disk as 41. hen feed wheels of this type are used the edges 41 cut into the material fed so that the chip skived off when making box toe stifieners appears sub stantially as shown in Figure 8. It will be noted in this figure that along the flatter edge of the chip, which edge is arranged transversely to the direction of feed asthe blank passes through the machine'and is the last part of the blank to pass between therolls, portions are broken off, due both'to the cutting effect of the teeth and the effort tending to feed the blank forward, such particles being indicated at a. ticles are liable to be carried along with the skived blanks and to be incorporated in the surface thereof. Particularly where these blanks are afterwards ironed or r lled these particles are liable to become partially embedded in the material in such a way as to project somewhat above the surface thereof so that if they are not removed before the blanks are inserted in the shoe projections are shown through the upper leather indicating the presence of these particles and seriously disfiguring the shoe.

In order to overcome this diihculty the feed disks in the present construction have their teeth out out of parallelism with the axis of the feed roll as shown in Figures 1, t, and 5, these teeth being indicated at 42, their narrow cutting edges a being inclined from the normal to the plane of the disk faces, or in other words, to the axis of the roll. These narrow edges or w rlz-engaging portions being formed on the pe ripheries of the disks define a cylinder, the surface of which includes them all and tothe adjacent surface elements of which they have a definite oblique relation, this re a- .tion being uniform for the cutting edges of any one disk. V hen disks of this type are used the markings on the skived. chip appear as shown in Figure 9 in which they are inclined from tne normal or transversely to the direction of feed of the work. Since the flatter edge of the blank is arranged transversely to the direction of feed through the machine, the teeth on the feeding roll ill exert pressure on the blank along spaced lines arranged diagonally or obliquely to the edge of the blank. Itis preferable to employ a series of such wheels the teeth of adjacent wheels being inclined oppositely so that the obliquity of each series of lines impressed on a blank is the reverse of that of These par-' the next adjacent series, and a herring bone or zigzag effect is produced. This minimizes any tendency of the inclinedteeth to feed the stock laterally as any tendency of certain wheels'to move the work in one direction laterally is counteracted by an equal thrust of teeth oppositely inclined. With this construction it is found that the par ticles are not broken off from the edge of the chip since if they are near enough to the edge to cause a decided weakening at that point their inclined position causes them to cut through at one end, the material yielding to permit the teeth to pass without breaking.

With the teeth as constructed in Figure 2 it has been found that portions of the material fed gradually fill up the spaces between the teeth so that the disks become in efiect solid and do not have the same feeding efiect as when the teeth are clear. Because of this it is frequently necessary to adjust the relative position of operative parts of the machine to cause the skiving to be effected where desired or to take out and clean the disks. To overcome this clifficulty the spaces or recesses between the teeth may be cut deeper at one side face of the disk than at the other, this being shown somewhat diagrammatically in Figures 6 and 7. This may be accomplished if desired by running a drill diagonally through the disk adjacent the teeth roots as shown in Figure 7. By this means the space at the deeper side of the wheel isnot narrower than that of the other side as would be the. case if the teeth faces were of V formation. This construction allows a ready escape for the material lodging between the teeth, the pressure of the material at the outer edges thereof causing any such matter to be pushed downwardly and laterally from between the teeth. As the washers 26 are of smaller diameter than the feed disks sufficient room is allowed laterally for the escape of such matter. This action. however, is further assisted by a series of fingers, shown in section at in Figure 1, which extend between the disks and press the material fed between the rolls against the matrice roll so that it is forced within the re cess 2. As the feed disks rotate it is evident that these fingers scrape off the material escaping from between the teeth and cause it to pass outwardly of the machine with the chip.

Having thus described an embodiment of the invention it should be evident that many changes and modifications might be made therein without departing from its spirit or scope as defined by the appended claims.

I claim:

1. A feed member comprising a series of coaxial spaced disks having work-engaging portions defining a cylinder, the work-engaging portions of each individual disk hav ing a common oblique relation to the adjacent surface elements of the cylinder.

2. A feed member comprising a series of coaxial spaced disks having work-engaging portions defining a cylinder, the work-engaging portions of each individual disk having a common oblique relation to the adj acent surface elements of the cylinder, and the work-engaging portions of successive disks being in zigzag relation.

3. A feed member comprising a series of coaxial spaced disks having on their peripheries spaced work-engaging portions defining a cylinder, the work-engaging portions of each individual disk having a common oblique relation to the adjacent surface elements of the cylinder, the spaces between successive work-engaging portions of any disk being of unequal depth at the opposite faces of the disk.

a. A feed member comprising a series of coaxial spaced disks having on their peripheries spaced work-engaging portions defining a cylinder and having recesses between successive work-engaging portions, the work-engaging portions of each individual disk having a common oblique relation to the adjacent surface elements of the cylinder, the work-engaging portions of successive disks being in zigzag relation, and said recesses being deeper at one face of the disk than at the other.

5. Apparatus for feeding friable blanks comprising spaced work-engaging members, each said member having means for engaging the blanks in a series of short lines,

said series extending in the direction of feed,

and said lines of a series being parallel to each other and oblique to the direction of feed.

6. The method of feeding a friable blank having an ed e arranged transversely of the direction of feed, which comprises exerting feeding pressure on said blank along series of short parallel lines oblique to said edge, each series being spaced from the other series and extending in the direction of feed.

7. The method of feeding a friable blank having a relatively thin edge arranged transversely of the direction of feed, which comprises applying feeding pressure to the blank in spaced parallel series of contact lines, each line being oblique. to said edge and parallel to the other lines in its series, and the obliquity of the lines of each series being the reverse of that of the next adjacent series.

In testimony whereof I have affixed my signature.

ELMER E. LANE.

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