US1887952A - Shearing mechanism - Google Patents

Description

Nov. 15, 1 932. w, HARNEY 1,887,952

SHEARING MECHANISM Filed Jan. 18, 1929 5 Sheets-Sheet 3 INVENT R razzczs //arn is ATTORNEYS NOV. 15, 1932. w. HA'RNEY 1,887,952

SHEARING MECHANISM Filed Jan. 18. 1929 5 Sheets-Sheet 4 Nov, 15, 1932. F. w. HARNEY 1,887,952

' SHEARING MECHANISM Filed Jan. 18, 1929 s Sheets-Sheet 5 v INVENTOR 7 am Wfifgrngy /ZzsATTQRNEYi i Patented Nov. 15, 1932 UNITED STATES PATENT OFFICE,

FRANCIS W. HARNEY, 0F LOCKPORT, NEW YORK, ASS IGNOR TO THE UPSON COMPANY,

01 LOCKPOBT, NEW YORK, A CORPORATION OF NEW YORK SHEARIN G MECHANISM Application filed January. 18, 1929. Serial No 333,431.

My present invention relates to gearing and transmission mechanism adapted particularly for shearing machines for cutting into lengths a continuously moving sheet or similar product, and it has for its object to pro: vide a simple and efiicient transmission mechanism of this character which will enable a shearing machine or the like to ra idly make a clean cut without interfering wit the progress of the product acted upon, or slowing .it up during a process of continuous production.

To these and other ends the invention resides in certain improvements and combinations of parts, all as will be hereinafter more fully described, the novel features being pointed out in the claim at the end of this specification.

In the drawings:

Fig. 1 is a top plan view showing the general layout of the machine including the driving gear; 1

Fig.2 is a longitudinal fragmentary section taken vertically on the line 2-.2 of Fig. 1 through a portion of the bed and the cutters showing the latter at'the beginning of their shearing movement;

Fig. 3 is a smaller fragmentary view of the same nature showing the cutters at the end of their shearing movement;

Fig. 4 is an enlarged fragmentary horizontal section through the clutch mechanism of the driven or operating shaft taken in the plane of the parting line of the gear box;

Fig. 5 is a more extensive View of the same and adjacent parts of the driving gear shown partly in section and partly in elevation;

Fig. 6 is an elevation of the driving gear except that'the driving shaft is in section on the line 6-6 of Fig. 1;

Fig. 7 is a transverse. vertical section through the clutch shipping mechanism taken on the line 77 of Fig. 1;

Fig. 8 is a section through the gearing takendsubstantially on the line 8-8 of Fig. 5 an Fig. 9 is a vertical transverse section taken substantially on the line 99 of Fig. 5.

Similar reference numerals throughout the several views indicate the same parts.

p The machine illustrated as an embodiment of my invent-ion in the present instance has been designed particularly for the cutting into lengths of sheets and boards such as the relatively heavy paper and composition Wallboards used for building purposes. These are produced in wide strips as a continuous process, and as they emerge from the forming machine it is desirable to cut them into sheets or slabs of uniform lengths without in any '60 short are, the cutters, of course, being rotated in opposite directions. During their movement in this are they travel at the linear speed of the article upon which they are acting which is as rapid as the process of production permits. During the rest of the travel of-these cutters they slow up to permit the desired length of the strip or board to pass between them before another cut is made. A ,There is a gearing for the normal or idle drive of the cutter and associated therewith a timing and clutch mechanism whereby a more direct drive at increased speed is obtained during the intervalat which the shearing action occurs. All the motive parts derive power from the same source, but an overrunning clutch permits the faster driving .mechanismat the cutting point to assert itrollers 2 thereon representing the delivery table of a wallboard making or similar machine, along which bed the wallboard B or 95 product to be acted upon is propelled in any suitable manner. The board passes-between a pair of rotary shearing devices 3 and 4 turning in opposite directions through the intermeshing of companion gears 5, all of such the drawon through the about to cooperate to make the cut in Fig. 2.-

The cutting occurs at increased speed equal to that of the traveling board through the short are indicated by the arrows at A, and ending at the point illustrated in Fig. 3. From there greater are C the' speed 1s reduced to permit a suitable length ofthe product to be fed through as aforesaid. This differential movement is obtained as follows:

Referring to Figs. 1 and 5, 8 indicates a -motor having a shaft 9 which, through a reducing gear box 10, drives, at reduced speed, a connected driving shaft 11 to which it is joined by a coupling 12. The drive shaft 11 has suitable bearings in a gear case 13, and

has fixed thereto a pinion 14 meshing with a combination transmission and clutch gear 15 shaft is a pinion 18 meshing with an operating gear 19 on the shaft 20 of one of'the rotary cutting elements 34. Splined on the shaft 17 to slidelongitudinally thereof is a' clutch element 21 complementary to the.

clutch element 16, and which has a normal tendency to engage the latter through the medium of a spring 22. When so enga ed the shaft 17 is, of course,.rotated and,-tT1rough its pinion 18 aforesaid, drives the cutters.

This is the rapid operative period of drive occurring within the ardA where the cut is made and is properly timed by a cam collar 23 on the shaft 20. This cam collar embodies a track 24 having a cam formation at 25 and the track is occupied (see also Fig. 7 by a roller 26 carried by an arm 27 on a transverse rock shaft 28 suitably journaled in the gear case 13. Within the latter there is fixed to this rock shaft at 29 a shipper yoke 30 having rollers 31 engaging in a peripheral groove 32 in the hub 34 of the clutch element 21 in the usual manner to shift that clutch ele ment against the tension of spring 22 out of cooperation with clutch element 16. This actuation occurs intermittently as will be seen and the rapid direct drive so accomplished is thus put under the direct control of the knife elements 34 themselves.

It is obvious, however, that it is depended upon the driving of the cutters 3-4 from some other source. To this end and for the driving of the cutters at a slower speed for the rest of their travel through the are C the following transmission gear is provided: Turning freely on the shaft 35 (see also Fig. 8) suitably journaled in the gear case 13 is a pinion 36 meshing with and driven from the transmission and clutch gear 15. This pinion 36 in turn meshes with a pinion 37 on a stud 38 which pinion through a gear 39 fixed thereon turns a. short shaft 40 suitably journaled in the gear case 13. The shaft 40 projects exteriorly of the case, at which point it is fittedwithpinion 41 meshing with a gear 42 carried by an adjustable stud 43 (Fig. 6) sliding in a slotted bracket 44 suitably secured to-the exterior of the gear case 13, and through which the shaft 40 projects. On this stud 43 and fixed to the gear 42 is a pinion 45 which meshes with a relatively large gear 46 on the end of shaft 35 which also projects outside of the gear case 13. It will, therefore, be seen that power is transmitted from the drive shaft 11 to the shaft 35 through the followin -instrumentality: 14, 15, 36 (loose on sha t 35) 37, 39, 40 '(Fig. 6) 41, 42, 45, to 46.

At the opposite inside end of the shaft 35 and fixed thereto is a pinion 47.- This meshes (Figs. 5 and 9, see also Fig. 4) with a ring gear 48 confined by rings 49 on an overrunning clutch hub 50 fixed to shaft 17, which clutch hub is in general the fixed part against which the clutch spring 22 reacts. This clutch hub 50 is provided with the usual tapered recesses or pockets 51 on its periphery containing rollers or balls 52 with springs 53 behind them. Following-the arrows on the various elements in the several figures it will be seen from this description and parthe shaft 17, and hence the cutters are nor mally driven through this overrunning clutch from the gear 47. When, however,

the clutch 16-21 is thrown in by the cam timing device on the cutter shaft and the shaft 17 is thus driven directly from the driving shaft pinion 14, it travels at increased speedand the clutch element 50 thereon overrunsits ring gear 48 which is still bein driven by pinion 47 through the other line 0 gearing, but at a lesser speed. As soon as the clutch 1621 is thrown out, the ring gear 48 resumes its take up on the clutch element 50 and through it continues the drive of clutch 17. v

The group of outside gearing 1 shown in Fig. 6 is detachable and interchangeable to obtain different ratios in the manner of the gearing of a screw cutting lathe, and inasmuch as the feed of the board B unmolested by the severing mechanism occurs during the drive through this gearing it will be seen that by this interchanging of gears the length of.the cut piece may be controlled.

Y I claim as my invention:

Shearing mechanism comprising a. rotary cutting element, a shaft operatively conmounted on said shaft, clutch teeth associated with said second gear, complementary clutch teeth operatively connected to said shaft, means for driving said second gear relatively rapidly, and mechanism for automatically engaging said complementary clutch teeth with said clutch teeth associated with said second gear during another part of each revolution of said cutting element, to cause said element to rotate more rapidly during said other part of each revolution.

FRANCIS W. HARNEY.

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