US1940708A

US1940708A - Leather splitting machine

Info

Publication number: US1940708A
Application number: US473572A
Authority: US
Inventors: Stevenson A Dobyne
Original assignee: CHAMPION SHOE MACHINERY COMPAN
Current assignee: CHAMPION SHOE MACHINERY Co; CHAMPION SHOE MACHINERY COMPAN
Priority date: 1930-08-07
Filing date: 1930-08-07
Publication date: 1933-12-26
Anticipated expiration: 1950-12-26

Description

S. A. DOBYNE Dec. 26, 1933.

LEATHER SPLITTING MACHINE Filed Aug. 7, 1950 I'IIIIIIIIIIII Patented Dec. 26, 1933 Champion Shoe 'Maehinery Louis, Mo., a corporation of Missouri Company, St.

Application August 7, 1930. Serial No. .473, l2 V 6 Claims.

' This invention relates generally to leather splitting machines and more particularly to a machine of that type having a reduction gearing between the operating device and its automatically adjustable feeding roll. V

The object o the invention, generally stated, is'to provide a leather splitting machine having adjustable feed rolls which are driven through a reduction gearing. g

A further object of the invention is to provide a reduction gearing suitable foroperating feed rolls which are adjustable relative to each other. A more specific object of the invention is to provide a flexible connection between the operating device and the adjustable feed roll. I Other objects will appear to those skilled in the art when the following description is read in connest-ion with the accompanying drawing, in

which--.

Figure 1 is a view in side elevation of a leather splitting machine constructed in accordance with my invention; 7

Figure 2 is an end View in section, taken along line 22'of Figure 1, showing the reduction gears ing for driving the machine illustrated and the flexible connection which I have provided;

Figure 3 is asectional View in end elevation ,taken along the line 3-3 of Figure :1; and u I Figure 4 is a side elevation showing another embodiment of this invention l I 1, Referring now to the drawing, and more particularly to Figures 1 and '2, the leather splitting machine comprises a framework consisting of a base. 1, having a pair of upright members 4-5 at opposite sides thereof and a cross member 6 connecting the upper extremities of the upright members. Each of the upright members 4-5 is providedwith a longitudinalslot 7, in each of which are mounted a pair of bearing boxes 8 and 9,. which carry, respectively, the ends of shafts 10 and 11 upon which are mounted

feeding rolls

12 and 13, respectively, the latter of which is corrugated. Upon one end of each of the shafts 10 and 11 are mounted gears 14 and r 15, respectively, whichengage each other and co-operate to rotate the feeding rolls l2 and 13 simultaneously.

A gear housing 16 is mounted upon the framework and secured thereto by a plurality of bolts 17 disposed thereabout for maintaining it in rigid position relative to the frame. The housing 16 carries a pair of bosses 18 and '19, in the former of which is mounted a shaft 21 carrying at its inner end a pinion .22 and having provided at its outer end an operating device in the form of a crank 23. Within the boss 19 is mounted a shaft 24, upon the innerend of which is mounted a gear which engages and co-operates with the pinion 22 to operate the leather splitting machine, as will be more fully described hereinafter.

Between the gear 25 and the gear 15, is provided a flexibleconnectionwhich in this particular embodiment consists in an arm26 secured to the outer face of the gear 15, so that it rotates therewith. Upon the outer end of thearm 26 is mounted an axially extending pin 2'? which is disposed for engagement with a slot 28 in. the gear 25 and extending radially thereof, thus providing a variable eccentric connection between

gears

15 and 25. i V .v r The bearing boxes 8 and 9, as previouslystated, are slidable within the slots 7 andare adjusted to variouspositions bymeans of set screws 29 and a bar 30. The bar .30 thus controls the position of the-roll '12, and only by movementof the bar 30 can the position of the .roll '12 relative to the frame be changed. 0n the otherv hand, theset screws29 merelyoperate to regulate the force of the springs which support the roll l3, as willbe more fully described hereinafter. The'baselis provided with a plurality of laterally Uextending lugs 31, arranged in vertically aligned pairs and in alignment with

thegupright members

4 and 5. A plate 32, having cylindrical portions 33ate'ach end thereof, is attachedt'othe famework, with one of the cylindrical portions 33' interposed between each pair of lugs 31, whereby to form guide cylinders. V Within each of the cylinders 33 is provided a spring ,34, whichis engaged at its lower end bya head 35 slidable relative to the cylinder, and-having therein a conical, recess 36,, as clearlyillustrated in Figure 1, for the reception of the pointed endof the set screw 29. One of the set screws 29 is in threaded engagement with the lower lug 31 of each pair, so that the position of the head 35 may be varied by adjustment of the screw 29. The spring 34 is engaged at itsupper end by a head B'Zwhich is also slidable within thecylinder 33 and which is mounted upon a-stem38 engaging at its upper end the bearing box ,9, whereby a rigid connection between the bearing box!) and the head-37 is provided, throughwhich the force of the spring 34 is transmitted directly to the bearing box 9. This organization is, of course, to be found in duplicate on opposite sides of the machine. 7 A pair of springs 40 are interposed between the bearing boxes 8 and 9 on-each side of the machine, as clearlyillustrated in Figures 1 and 3, and provide a yieldable connection for the transmission of force between the bearing boxes.

It is apparent that the springs 34 and'40 are bar 30. g A hand lever is pivotally mounted upon the top piece 6 at its central portion by a bolt 46, which is provided with a wing nut 47 disposed to be tightened and thereby restrain movement of the hand lever 45 relative to the top piece 6. The hand lever 45 is provided at its lower end with an open slot 48 for engagement with a pin 49 carried by the slidable bar 30, whereby is established a connection which permits the operation of the slidable bar by the hand lever 45. It will be noted that the slidable bar 30 is provided at each of its ends with inclined surfaces 51, which surfaces lie in parallel planes and are disposed for engagement with the transverse pins 43 carried by the cars 42 of the bearing boxes 8. It will thus be seen that when the bar- 30 is actuated to the left by the hand lever 45,

a downward force is applied to the bearing boxes 8 through the pin 43 to move them downwardly against the action of the

springs

34 and 40.

A splitting knife 52 is carried by brackets 53, which are connected to each of the

upright members

4 and 5, and hasits cutting edge disposed adjacent to the space which intervenes between the

feed rollers

12 and 13. Upon the opposite sides of the

upright members

4 and 5 is mounted a working table 54, which facilitates in guiding the leather to be split.

An indicating scale is provided on the bar 30, which co-operates with the pointer 55 to indicate the position in which the upper. feed roller 12 is stationed.

In the operation of the device, the set screws 29 are actuated to move the lower roller 13 to a position in which its top is just even with the cutting edge of the knife 52 and the bar '30 is then operated until the desired position is shown at the indicator, and in which position the upperfeed roller will be disposed so that the thickness of the leather, after passing the cutting edge of the knife, will be such as is desired. It is thus seen that the graduated scale on the bar 30 indicates the distance between the bottom of the upper feed roll 12 and the cutting edge of the knife 52, which distance determines the thickness of the sheet after the. splitting operation is completed. 7 v

When the desired adjustment between the feed roller 12 and the knife edge has been attained, the handle 23 is operated to drive the rollers through the gear train hereinbefore described and through the flexible connection 2728. The flexible connection permits the relative adjustment between the bearing boxes 9 and the framework towhich the gear housinglfi is rigidly attached and, accordingly, permitsof a Variation in the radial distances between the axes of the

gears

15 and 25, as well as between the axis of the pinion22'and that of the gear 15, during such adjustment of the bearing boxes 9.

In the embodiment shown in Figure 4, the flexible connection 27-28 is substituted by an Oldham coupling 56, wherein a pair of co-operat ing members are each provided with a groove and tongue perpendicular to each other and which operate ina manner well known in the art.

By the use of such a flexible connection between the

gears

15 and 25, it is possible to permit movement of the roll 13 relative to the frame and roll 12 without altering the position of the driving gear and casing. It is thus possible torigidly connect the casing of the driving gear to the frame and thereby obtain a steady and positive support for operating the crank.

axes. v

From the foregoing description, it is believed that a preferable embodiment of my invention has been fully described, but it is to be understood that this disclosure is merely illustrative and that many modifications will present themselves to those skilled in the art, which may be made without departing from the spirit of my invention or from the scope of the appended claims.

Having thus described the invention, what is claimed is:

1. A device of the kind described comprising, a frame, a pair of rolls adjustably mounted in cooperative relation on said frame, interconnecting gears secured to each of said rolls, one of which gears is connected to drive the other, drivshaft and said movable gear movable to permit substantial variation in the axial distance therebetween.

3. In a machine of the character described, a

pair of parallel feed rollers,-means for mounting one of said rollers for movement relative to the other, gears on said rollers' meshing with each other, the gear on said movable roller being adapted to drive the other, a drive shaft journaled in a fixed mounting, and a flexible driving connection from said drive shaft to said movable roller automatically shiftable to accommodate variations in the distance between the axes of said drive shaft and said movable roller.

4. In a machine of the character described, a frame, a pair ofparallel feed rollers, means for mounting one of said rollers for movement on said frame relative to the other, connections whereby said movable roller drives the other roller, a drive shaft journaled in a fixedbearing on said frame, and driving connections from said shaft to said movable roller having an extensible portion adapted to accommodate variations in the distance between the axes .of said drive shaftand said movable roller. v 1

5. In a machine of the character described, a frame, a pair of parallel feed rollers, means for mounting one of said rcllers for movement on said framerelative to the other, a drive shaft journaled in a fixed bearing on said frame, and driving connections from said shaft to saidroller including a crank on one having a sliding connection with the other adapted to accommodate variations in the distance between their axes.

' 6. In a machine of the character described, a framaa pair of parallel feedrollers, means for mounting one ofaid rollers for movement on said frame relative to the other, a drive shaft journaled ina fixed bearing on said frame, and driving connections from said shaft to said roller including a crank on one having a pin-and-slot connection with the other adapted to accommodate variations in the distance between their STEVENSON A. DOBYNE.