US2623397A

US2623397A - Drive for a rotary member

Info

Publication number: US2623397A
Application number: US43638A
Authority: US
Inventors: Battersby James Eckersley
Original assignee: Masson Scott and Co Ltd
Current assignee: Masson Scott and Co Ltd
Priority date: 1947-08-18
Filing date: 1948-08-11
Publication date: 1952-12-30
Anticipated expiration: 1969-12-30

Description

J E BATTERSBY DRIVE FOR A ROTARY MEMBER Dec. 30, 1952 Flled Aug 1; 1948 "Dec 30, 1952 J. E. BATTERSBY 2,623,397

DRIVE FOR A ROTARY MEMBER Filed Au 11, 1948 I 2 SHEETS-SHEET 2 Patented Dec. 30, 1952 2,623,397 DRIVE FOR A ROTARY MEMBER James Eckersley Battersby,

London, England, as-

signor to Masson Scott & Company Limited,

London, England Application August 11, 1948, Serial No. 43,638

In Great Britain August 18,

'7 Claims. 1

The present invention relates to an improvement in cross cutters for cutting a uniformly moving web of paper or the like and which cutters include a rotatable knife cooperable with a stationary knife with the rotary knife being spirally mounted so that the web or webs are progressively severed across the width thereof.

The invention particularly relates to the mounting of the knife means and the driving of the same.

More particularly the invention relates to the specific disposition of a frame carrying the knife means with respect to the main frame of the machine.

In order to obtain a square cut with an arrangement of the above kind, the axis of the rotary knife member must be inclined with respect to the longitudinal axis of the web, the angle varying in accordance with the respective knife and web velocities, requiring an adjustable mounting of the drum or equivalent knife-carrying member and appropriate construction and arrangement of the drive to accommodate such adjustments.

It has been customary in the past to drive the knife drum or equivalent knife-carrying member through a bevel gear on one end of the drum shaft meshing with a bevel pinion driving shaft, the drum bearings being arranged so that they may be adjustably displaced upon their supports about the axis of the said vertical shaft. One of the drawbacks of this form of drive is that the drive mechanism is relatively complicated and therefore expensive, and further the cutter drum and bed plate require to be bodily displaced to a. considerable degree in order to vary the inclination of its axis within the required limits.

It is one of the objects of the present invention to provide an improved form of drum or cutter mounting and drive therefore by virtue of which the required adjustments are accomplished by a reduction of the distance through which the drum and bed plate are required to be displaced.

According to the invention, a rotary cutting means of the kind described is mounted for adlusting movement to vary the inclination of the cutter with respect to the web path and is driven by belt or rope means, preferably multiple belts or ropes in conjunction with correspondingly grooved pulleys, disposed about the axis of adjusting displacement. In the preferred arrangeon a vertical ment multiple belts of V section, engaged in correspondingly grooved pulleys are employed.

According to a further feature of the invention, the driving belt, or group of belts, is disposed to lie in a plane substantially parallel to the axis of rotation of the cutting means and preferably in a plane also passing through or near the cutting edge of the stationaiy or dead knife.

The arrangement requires the belt pulley to be mounted on a shaft at right-angles to the drum shaft and driving the latter through gearing, preferably worm gearing.

According to a further feature of the invention, the vertical axis about which the pivotal adjusting movement of the drum is effected is disposed to one side of the drum shaft and in a vertical plane which passes through or near the edge of the stationary or dead knife. In the preferred arrangement, the bearings for the rotary knife drum and the V pulley driving the drum shaft are carried by a cradle or frame which is mounted for adjusting movement about a vertical fixed pivot in the main framework. The said fixed pivot is located to one side of the drum shaft as described above and the V drive pulley is arranged so that the belts are disposed symmetrically about the axis of the said pivot. The V drive pulley shaft may conveniently be carried in a frame constituting an extension or part of the frame carrying the main bearings for the drum, and a worm gear is provided for transmitting the drive from the said shaft to the drum shaft. A coupling may be interposed between the worm gearing and the drum shaft.

The V pulley associated with the cutter drum shaft will generally be driven from a similar pulley located vertically beneath it, and the said lower pulley may be associated with some form of infinitely variable gear through which the drive is taken. Alternatively the V pulleys themselves may be variable to provide the necessary speed changes. It will be appreciated that the V pulley associated with the drum shaft will be displaced when the latter is displaced to vary the general inclination of the cutter, and such displacement will involve relative angular movement of the planes of the two V pulleys. Such angular differences will, however, be relatively small and readily accommodated by the belts without interferring in any way with the drive transmitted thereby.

By this mode of drive the vertical pivot about which the knife drum assemblage is adjusted may be located as near as practicable to the drum and a relatively simple and compact drive ar rangement is afforded.

*jl'O ample, a rotary drum I carrying a cutting knife la of spiral form (the spiral shape beingonly just perceptible owing to the 2 for severing sheets from a web or webs of paper scale .of the. drawings 1 adapted to co-act with a stationaryv or dead-knife or other material is supported in end bearings,

3 only one of which a frame or cradle 4 supported on the main frame' work 5 of the cutting machine. frame 4 also carries the stationary knife 2 which The said.- cradle is arranged to one side of thedrum-shaft. On

the same side of the drum shaft and beyond the.

shaft bearing, the cradle frame 14 has a bracket.

6 forme'dwith a vertical bore, which maybe in a bossprovided on thebracket, fitting over a Vere l pin 1 carried in a bracket 50 tical fixed pivot boltedsto'the-main supporting framework 5, so thatany displacement of the cradlefra m-e .4 is constrained to parallel: to the vertical. plane containing .thelaxis of :the: drum I and passing near -to the cutting take place about theaxis of such pivot pin 1 which axis lies-in .a vertical plane.

edge of the. stationary knife 2. At the same-end of the drum; the

its bearing 3 and is connectedby'a coupling 58 toaworrn gear-drive I75 the'drivin-g shaftni-I or drum shaft 3 "extends beyond which is horizontal and at right-angles to the,

drum-shaft:8. Thebearingsiof this shaft I i and of the;worm.gear are also carried by thebrack-et 6 whichis provided-with thepivotbore; A V-'.

grooved pulley 12 is mountedonthe horizontal shaftJ I and is disposed so that thecentral plane of the pulley coincides pin'J and-the belt grooves are disposed symmete ricall-y'on-either side thereof. The-pulley iZ has with the. pivot axis of the multiple .V grooves and belts whichare driven from a second v.

x I v groove. pulley l-3 mounted vertically beneath the firstjThe said lower pulley I" I3 may".conveniently'bemountedon the final shaftof an infinitely variable gearli i such as Reeves'type' gear,"the drive being main drive shaft of the'machine;.

60 takenfrom' the"? -rAs shown, this lower pulley means-i3 is mounted so thatthe mean or centralaxis-"of the pivoti.

plane thereof coincides with the Instead of the gear 4 2, the necessary speed changes-may be-efiected by the V. pulleysbeing themselvesvariable-"as to diameter,

The 1 stationary. ranged to one side thereon-the webto be severed being fed 'thereto cutting knife" is generallyar or. the drum-'and'below theiaxis in a downwardlyinclined "direction by feeding rolls preceded it" necessary; by rotary slitter knives 1':

which divide the pass to conveyor to fan automatic stacking device.

web longitudinallye -f' After the sheets have b'eensevered by therotary knifethey-a means and thence ii desired,-. ljhefeeding rolls'and slitter knives aregeneral-ly. carried bythelmain framework on which thev I rotary knife-re is also carried and may be driven.from'the aferev saidmain shaft by multiple V beltsor ropes: lt

willbe understood-that thecradle frame oarryring' the rotary knife is also adj ustable through-e horizontal displacement upon the-main :f-ramea work, such adjustment bei r'l-g effectedby-suit-- able screw devices in conjunction With clamping means.

Since the general arrangement and mounting of the rotary cutting means may be Widely varied in accordance With practical requirements it will be appreciated that the drive arrangement described. "above- I may be -modifiedaccordingly. Whilst the a mountof power required for cutting will generally necessitate the use of multiple drivingebelts, circumstances may occur in which a single belt is suificient, or rope drives may be employed;-

I claimu 1. A drive arrangement for an angularly adjustable rotary member comprising a main frame, a secondary frame, a rotary member rotatable aboutah'ori'zontal'axis carried by said secondary frame, a cradle embodied with said secondary frame fand "extending longitudinally of the axis of the member, a fixed bracket extending laterally .of the main fra-me-beneathsaid cradle, said fixed bracket carryinga vertical pivot, said-pivot being-disposed laterallyof the axis of rotation Y of the' rotary member andat least closely-ad.--

jacen'tthesmainframe, said cradle having a ver-'-- tical aperture thereinreceiving and journalling said pivotwhereby said-secondary framezis -swing- I able about said=pivot with'respect-to said-"main iramegsa, shaft carried" by said cradle at rotary member; saidshaft being mounted'above said vertical pivot, pulley; means: carriedb'y :s'aid plane of said pulley'means coin-32 axis of said vertical pivot, second 5 shaft, 'thefmean ciding with the pulley means mounted on said main frameuibe-i.

neath said vertical pivot' a'nd' belt means trai'ned about both 's'aid -pulleys =with the runs "thereopassing on opposite 'sides o'f saidvertical piv'ot and means for impartin right angles with respect to the axis of rotation of said=- g' variabIe-speed to said pulley i'ne'ansy the arrangementbeing such that' the clos'e'r' thef vertical pivot axis is disposed with respect to 'theQmain frame the. less bodily-dis placement of the secondary frame with respectv to the main frame is required and the lesstwisting' of thebeltmeans' relative to "the pulley is effectedirr order to providea given angular varia tion'- of "therot'ary member relative to the main frame? 2. A drive "arrangementfor an angularly-ad"- justabl'e rotary member comprisin'g in combinattion with a main frame; a cradleisupporting the rotaryr'member, a. pivot means carried'i'by the'f'" mainframe and disposed'in aplane that'is later ally: offset with relation to the plane containing the axis or 'the irotary member; means connecting thefcradle to "the jpivot "so that the cradle can swing'thereabout', the location ofthe pivot with? respect to the axis of the rotary'mern'ber per? mitting' "maximum angular. adjustment of the member withminimum 'swingingi'of thecradle, spaced pulley'mean'si'o-r driving the rotary .mem

ber' respectively fcarri'ed by main frame with the mean ciding with the "axis'of the 'the cradle and .the plane thereof'coin pivot meansandthe plane of thepulley carried by thecradl'ei'being parallel to thea'xis of 'therotarymember; flexible" drive" means trained over said pulley means and" assingsymmetricauy on opposite sidesof 'said piV0t",alXiS,' anutheioeation 0f 'thepulleymean's with respect to the pivot aXi'S minimizing 'misalignment jof the I pulleymeans "Whe ifthe :cradl'e I is angularlyj adjusted witli respect to th"mai'n frame drive therefore comprising a main frame, a cradle movable thereon, said rotary member being supported by said cradle, said cradle including an extension projecting laterally of said frame, pivot means supported by the frame and connected with said extension, said pivot means being located closely adjacent said frame and laterally offset with relation to the axis of the rotary member, a drivable shaft carried by said exten sion and disposed perpendicular to the axis of said rotary member, means connecting said shaft to the rotary member for driving the same, a first pulley means carried by said shaft and disposed in a plane parallel to the axis of the rotary memher and said pulley means being located above and with its mean plane coinciding with the axis of said pivot means, a second driven pulley means carried by the main frame beneath said pivot means and disposed in a plane perpendicular to said main frame, with the mean plane of said second pulley means coinciding with the axis of the pivot means and flexible drive means trained over both said pulley means and passing symmetrically on opposite sides of said pivot axis, the arrangement being such that the location of the pivot means closely adjacent the main frame and with respect to the axis of the rotary member and the location of the pulley means with respect to the pivot axis permitting maximum an gular adjustment of the cradle relative to the main frame with minimum bodily displacement and minimum misalignment of the pulley means.

4. A drive arrangement as defined in and by claim 2 in which the pulley means comprise multiple grooved pulleys and the flexible drive means comprise multiple V-belts.

5. A drive arrangement as defined in and by claim 2 and a worm gear drive connected be" tween the first mentioned pulley means and the rotary member.

6. A drive arrangement as defined in and by claim 2 and an infinitely variable gear means operably connected with said second mentioned pulley means.

7. A drive arrangement for an angularly adjustable rotary member comprising angularly movable supporting means for supporting said member including a pivot means laterally offset with respect to the axis of the rotary member and belt and pulley drive means for rotating said member including a first pulley means also carried by the supporting means located above said pivot means with its axis perpendicular to the axis of the rotary member and its mean plane coinciding with the axis of the pivot means and a second pulley means located beneath said pivot means also with its mean plane coinciding with the axis of the pivot means and belt means trained over both said pulley means and passing symmetrically on opposite sides of said pivot means.

JAMES ECKERSLEY BATIERSBY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 317,612 Barton May 12, 1885 483,904 Daggett Oct. 4, 1892 1,043,527 Lindquist Nov. 5, 1912 1,867,335 Strecker July 12, 1932 FOREIGN PATENTS Number Country Date 10,788 Germany Sept. 8, 1880 89,264 France Mar. 28, 1870 417,871 Germany Aug. 20, 1925