US3107873A

US3107873A - Winders and rewinders for paper machines

Info

Publication number: US3107873A
Application number: US178393A
Authority: US
Inventors: Greding Robert
Original assignee: Dominion Engineering Works Ltd
Current assignee: Dominion Engineering Works Ltd
Priority date: 1962-03-08
Filing date: 1962-03-08
Publication date: 1963-10-22
Anticipated expiration: 1980-10-22
Also published as: GB983942A

Description

Oct. 22, 1963 R. GREDING WINDERS AND REWINDERS FOR PAPER MACHINES Filed March 8, 1962 5 Sheets-Sheet J.

INVENTOR. ROBERT GEELDING A ORA/EX Oct. 22, 1963 R. GREDING 3,107,873

WINDERS AND REWINDERS FOR PAPER MACHINES Filed March 8, 1962 5 Sheets-Sheet 2 INVENTOR. ROBERT (312 ED l NG ATZZOPA/EY Oct. 22, 1963 i i R. GREDING 3,107,873

WINDERS AND REWINDERS FOR- PAPER MACHINES Filed March 8, 1962 5 Sheets-Sheet 3 LARGE 'EOLL EuEcToE 5 1 I FEONT DRUM 0 LARGE EOLL. 2

EuccToE ARMS 7 SMALL 12014.

auccToE ARMS s T 1:? 4 I I :z9fi ----y-- :rnc RODS o "REAR DEUM FULCRUM 1 POINTS FLUID CYLINDER INVENTOR. ROBERT GEED| NG A GPA/5% 1963 R. GREDING 3,107,873

WINDERS AND REWINDERS FOR PAPER MACHINES Filed March 8, 1962 s Sheets-Sheet 4 X5 2 INVENTOR.

I ROBERT GEEDING ATT PNEX Oct. 22, 1963 R. GREDING 3,107,873

WINDERS AND REWINDERS FOR PAPER MACHINES Filed March 8, 1962 5 Sheets-Sheet 5 INVENTOR. ROBERT GEEDI NG United States Patent 3,107,873 WINDERS AND REWINDERS FOR PAPER MACHINES Robert Greding, Beaconsfield, Quebec, Canada, assignor to Dominion Engineering Works Limited Filed Mar. 8, 1962, Ser. No. 178,393 1 Ciaim. (Cl. 242-66) This invention relates to new and improved winders and rewinders for paper machines and more particularly to winders and rewinders having an ejector mechanism which will eject rolls of all sizes from winders or rewinders, from a fully wound roll down to an empty core shfit.

A winder, or more specifically a slitter-winder, is positioned at the dry end of a paper machine after the calender and reel, and comprises slitters and windup stand in one single unit. Its function is to rewind the paper which has been wound by the reel and which contains breaks and rough edges, and at the same time to slit the paper into the required widths. The two drums, upon which the core shaft rests, are driving drums and, therefore, turn the core shaft by surface contact, which, therefore, maintains a constant paper winding speed.

A rewinder is identical to a winder, except that it is usually much narrower. A rewinder usually operates in a finishing room, and is used for rewinding the rolls which have been slit into comparatively narrow widths on the winder and slitting them again into very narrow widths. It is also used for rewinding rolls which have been damaged on the way to the finishing room, and for many other miscellaneous jobs.

The ejector mechanism, which is the subject of this invention, comprises linked arms which move in unison to eject rolls of all sizes, by pushing on the core shafit journals of small-rolls, or by pushing large-rolls with a largeroll ejector.

The principal object of the invention is to provide a new and improved winder or rewinder for a paper machine or the like, which will eject rolls of paper, or other material, of any size from a fully wound roll down to an empty core shaft.

Another object is to provide means for gently lowering a core shaft between the drums when loading a core shaft onto the winder.

A further object is to provide means for ejecting a core shflt after a bad start or for other reasons.

Another object is to provide a device of the character set forth which is more simple and economical than prior devices and which employs only one actuating mechanism.

Another object is to provide a device of the character set forth wherein only one control is required for all movements.

Another object is to provide a device of the character set forth which effectively utilizes the full range of the winder, by making it possible to wind rolls of any size without delay in the winding operation, thus allowing unrestricted choice of roll diameter and permitting the salvage of paper.

Other objects and advantages of the invention will be apparent from the following description taken in connection with the accompanying drawings wherein the preferred form has been given by Way of illustration only.

Conventional methods of ejecting rolls from winders or rewinders are capable only of ejecting rolls from a fuliy wound roll down to a certain minimum roll size. Below this minimum size the rolls must be removed by hand or crane or by means of a separate ejector for smallrolls and core shafts.

The disadvantages of such conventional methods include the fact that they call for excessively strenuous effort by the machine operators, are time consuming and, in the case of the third method mentioned, require extra equipment. v

Referring to the drawings:

FIG. 1 is a side elevation of the preferred form of the invention on a winder device;

FIG. 2 is a front elevation of the apparatus shown in FIG. 1;

FIG. 3 is a view generally similar to FIG. 1, but showing the ejector at rest;

FIG. 4 is a side elevation generally similar to FIGS. 1 and 3, but showing the ejector in maximum eject position;

FIGS. 5 to 8 are side elevations of modified forms of the invention; and. 1

FIG. 9 is a sectional view taken'on line 99* of FIG. 7.

Referring more particularly to the drawings wherein similar reference characters designate corresponding parts throughout, FIGS. 3 and 4 show several roll sizes, superimposed for simplicity in illustration, from an empty core shaft (2, to small-roll b, to intermediate roll c, to fully wound roll d.

In the arrangement shown in FIGS. 1 to 4, the largeroll ejector 1 is positioned on arms 2 which pivot about fulcrum points 3 and are actuated by fluid cylinders 4. Large-roll ejector 1 moves in an are around rear drum 5.

The small-roll ejector arms 7 pivot about the axis of the front drum 6.

Large-roll ejector arms 2 and small-roll ejector arms 7 are linked together with tie rods 8, forcing both ejector arms to move in unison.

When actuated, large roll ejector 1 ejects rolls from the fully wound size roll d down to the

intermediate drums

5 and 6 using the axis of free wheeling front drum 6 as a fulcrum point and starts rolling off the winder as soon as its centre of gravity moves over the centre line of front drum 6.

Both ejectors 1 and 7 are actuated by the same device, fluid cylinders 4, and move in unison through (tie rods 8, which are in compression during the ejection movement. This makes it possible to use one simple control device for the entire ejection system.

Smail-roll ejector .arms 7 may also be used to gently lower core shaft a between

drums

5 and 6 when loading the winder, as follows. 7 I

Core shaft a is rolled against the small-roll ejector arms 7, which are in maximum eject position. Small-roll ejector arms 7 are then lowered into their at res positions, thus gently lowering core shaft a between

drums

5 and 6 and preventing any damage.

FIGS. 5 to 8 show alternative executions of the invention.

In the execution shown in FIG. 5, the large-roll ejector arms 2;! are pivoted about the axis of rear drum 5, and the small-roll ejector arms 7a are pivoted about the axis of front drum 6. Tie rods 8 are mounted between extensions 9 from large-roll ejector arms 2a and extensions 10 from small-roll ejector arms 7a such that they are in tension during the ejection movement. FIG. 6 shows an execution in which the large-roll ejector arms 2b are pivoted about the axis of rear drum 5 and the small-roll eject-or arms 7a are pivoted about the axis of front drum 6. Tie rods 8 are mounted between gear segments 9a extending from large-ro1l ejector arms 2b and extension 1%, extending from small-roll ejector arms 7a such that, in a manner similar to the execution shown in FIG. 5, they are in tension during the ejection movement. Gear pinions 4a are positioned in engaging contact with gear segments 59a and supply the actuating torque.

In the execution shown in FIG. 7, large-roll ejector arms 2c and small-roll ejector arms 7b are pivoted about the axes of rear drum 5 and front drum 6 respectively. Gear segments b extend from large-roll ejector arms 2c and gear segments 16:: extend from small-rollejector arms 70, with gear pinions 4a positioned in engaging contact to supply actuating torque simultaneously to gear segments )b and 100. t

MG. 9 is a section on 9-9 of FIG. 7 and shows in detail the engaging contact between gear segments 9b and 19a and gear pinions 4a.

In the execution shown in FIG. 8, large-roll ejector arms 2d and small-roll ejector arms 7c are 'pivoted about the axes of rear drum 5 and front drum 6 respectively. Chain sprockets are fixed to the ejector arms 2d and 7c,

coaxial with the axes of the drums and are mechanically linked by chain loops 8a, driven by driving sprockets 4b.

From the foregoing, it will be seen that I have provided new and improved means for obtaining all of the objects and advantages of the invention.

l claim: 7

In a winder for paper machines including a base frame and a pair of drums for supporting and driving rolls of paper by surface contact, said pair of drums suitably journalled on said base frame, means for ejecting large rolls and small rolls, said means including a largeroll ejector and large-roll ejector arms pivotally mounted and small-roll ejector arms pivotally mounted coaxial with the journals of one of said pair of drums, and means for actuating simultaneously said large-roll ejector arms and said small-roll ejector arms, said means including fluid 7 cylinders operatively connected to said large-roll ejector j arms and tie-rods operatively connected between said large-roll ejector arms and said small-roll ejector arms. References Cited in the file of this patent UNITED STATES PATENTS 1,939,198 Berry Dec. 12, 1933