GB2073712A

GB2073712A - Threading into nip between winding reel and driving drum

Info

Publication number: GB2073712A
Application number: GB8011982A
Authority: GB
Original assignee: Mather & Son Ltd Alexander
Current assignee: Mather & Son Ltd Alexander
Priority date: 1980-04-11
Filing date: 1980-04-11
Publication date: 1981-10-21
Also published as: GB2073712B

Abstract

A web reeler includes mechanism for threading or rethreading a web (1a) onto the reel (1) in the event of breakage of the web (1a) of paper or paperboard. The mechanism comprises a first pair of levers (18) pivotally connected, respectively, to the lower ends of a second pair of levers (17) whereof the upper ends are pivotally connected to ram-controlled arms (6) urging the reel (17) into frictional engagement with the winding drum (2). A transverse roller (21) for supporting an end portion of paper or paperboard connects free ends of the levers (18) and the free ends carry a cutter blade (22). Rams (20) are provided for actuating the levers (18) to bring the paper or paperboard on said roller (21) into engagement with a lower portion of the reel (1), and rams (25) are provided for actuating the levers (17) to wrap the paper or paperboard around the reel (1) and to bring the roller (21) and the paper or paperboard directly above and adjacent the nip between the drum (2) and the reel (1). An operator holding the free end of the paper or paperboard can then allow the latter to be folded and fed into the nip, so that the paper or paperboard is pulled down on to the cutter blade (22) and the free end portion of the paper or paperboard is cut off. Manual feeding of the leading end of the web into the nip is thus unnecessary. <IMAGE>

Description

SPECIFICATION Apparatus for forming reels of web material on a core This invention relates to apparatus for forming reels of web material on a core. The invention is especially concerned with the reeling of paper or paperboard as it passes from the paper or board making machine, and the web material will be hereinafter referred to as paper.

Such apparatus is located at the dry end of many paper making machines, and consists generally of a rotary drum and a core forming a nip between them or between the drum and the paper on the core. The drum is fixed in position, but the core can move away from the drum to compensate for the increase in diameter of the reel of paper being formed. The core or reel is urged into frictional engagement with the drum by a pair of upstanding pivoted arms usually under the control of rams.

Such apparatus is commonly called a drum reeler, and is driven synchronously or in accurate speed relationship with sections of the paper making machine in advance of it.

Such apparatus will be referred to hereinafter as apparatus of the kind aforesaid.

If the paper breaks in advance of the drum reeler, the machine keeps running, and the drum and the partially formed reel continue to rotate, but the supply of paper to the reel ceases. The paper web is then re-established and is ready to be fed around the partially formed reel. Hitherto, this has been done by hand, sometimes assisted by air blasts, with the consequent hazards of feeding machinery by hand.

An object of the present invention it to provide, in apparatus of the kind aforesaid, mechanism for initiating the feed of paper to the reel, or re estabiishing the feed to the reel in the event of paper breakage, so that the present hazards of manual feeding are obviated or mitigated.

According to the present invention there is provided, in apparatus of the kind aforesaid, mechanism for the purpose aforesaid, said mechanism comprising a first pair of levers pivotally connected respectively to the lower ends of a second pair of levers whose upper ends are pivotally connected respectively to said arms, a transverse guide for supporting an end portion of paper and a cutter blade carried by free ends of said first pair of levers, means for actuating the latter to bring the paper on said guide into engagement with a lower portion of the reel, and means for actuating the second pair of levers to wrap the paper around the reel and to bring the guide and tile paper into a position directly above and adjacent the nip between the drum and the reel, whereby an operator holding the free end of the paper can allow the paper to feed folded into the nip, so that the paper is pulled down on to the cutter blade and the free end portion of the paper is cut-off.

An embodiment of the invention will now be described by way of example, with reference to the accompanying drawings, in which: Fig. 1 is a side elevation of known apparatus of the kind aforesaid with some parts omitted; Fig. 2 is a plan view corresponding to Fig. 1; Fig. 3 is view corresponding to Fig. 1, to a larger scale, and showing mechanism according to the present invention, and is a section on the line X-X of Fig. 4, and Fig. 4 is an end view corresponding to Fig 3 and is a part-sectional view of the line Y-Y of Fig.

3.

Referring to Figs. 1 and 2, a web of paper 1 a being drawn from a paper making machine is fed over a drum 2 on to a core 4 to form a reel 1. The shaft of the drum 2 is rotatably supported on opposed side walls or frames 3. The frames 3 have upper edge portions 3a, which are normally straight and horizontal, and form runways for grooved bearing sleeves 5 carried on opposed ends of the shaft of the core 4. Opposed upstanding arms 6 and pivotally mounted at their lower ends on a cross shaft 7 supported by the frames 3. Upper end portions of the arms 6 abut the bearing sleeves 5 and urge the core 4 against the paper on the drum 2 under the control of fluid operated rams 8.

By known means, not shown, the reel winding will have been started around the empty core 4 in a position above the drum 2, after the previous reel was at the required diameter and had been removed. By known means, the newly started reel is indexed round the periphery of the drum 2 until the sleeves 5 rest upon the runways 3a.

If a paper break occurs, the leading edge of the re-established web is led by hand into the nip between the drum 2 and the partially formed reel 1, and is pulled clear by an operator for a short time. The operator then tears off the web at a position nearly under the reel, and leads the new leading end over the reel and lets if fall into the intake nip, so that the reeling process is thus resumed. The reel core 4 moves gradually away from the drum 2 as the reel diameter increased, and the arms 6 retain their pressure, until at some later time the reel core reaches the position 4a, and the arms are in the position 6a.

The mechanism according to the present invention will now be described with reference to Figs. 3 and 4 in which parts corresponding to those in Figs. 1 and 2 are indicated by the same numerals.

The arms 6 carry bearings 10 adjacent their upper ends, in which spindles 11 are rotatably mounted. A tubular member 12 with bearings 13 extends around the cross-shaft 7 and carries two chain wheels 14 fixed to it. A chain wheel 1 5 is fixed to each spindle 11, and a chain 16 connects each pair of chain wheels 14, 1 5.

A first pair of levers 1 8 are pivotally connected intermediate their ends respectively by pins 1 9 to the lower ends of a second pair of levers 1 7 whose upper ends are secured respectively to the spindles 11. One free end of each lever 1 8 is pivotally connected to each arm 6 by a fluidoperated ram 20, and the other free ends of the levers 1 8 are connected by a paper-guide in the form of a roller 21. A cutter blade 22 also extends between the arms 6 adjacent the roller 21. The tubular member 12 has a lug or lever 23 pivotally connected by a pin 24 to one end of a fluidoperated ram 25. A slide plate or chute 26 inclines downwardly from directly below the nip between the drum 2 and the reel 1 to a position above the tubular member 12.

If a break occurs in the paper 1 a, the drum 2 and the partially formed reel 1 continue to rotate.

When the paper web has been re-established it is fed through the nip between the drum 2 and the reel 1 and talls on to the slide plate 28. It slides down the latter to within easy reach of an operator, who lifts it over roller 21 and pulls it taunt. The levers 18 are then actuated by the rams 20 until the roller 21 presses the paper web against the partially formed reel, so that the paper foliows the path A, Fig. 3, and is urged against the reel 1. The rams 25 are then operated and the levers 1 7 rotate through approximately 1200 carrying the levers 18 and the roller 21 with the paper around the periphery of the reel 1 to a position in which the roller 21 is directly above and adjacent the nip on the intake side. At this stage, the paperfollows the path denoted B in Fig.

3, and is being pulled back over the cutter blade 22 by the operator. The operator stops pulling the paper but retains his hold on the paper, thus generating surplus paper below the roller 21. This surplus paper enters the nip and causes a reverse pull on the free end of the paper held by the operator. The knife 22 is so angled that this motion cuts or tears the paper, so that a minimum length of folded-over paper goes into the nip. The mechanism may then be returned to its initial position.

Various modifications may be made without departing from the scope of the invention. For example, the shaft 7 may alternatively be two stub shafts, the chain wheels 1 4 need not be co-axial with the tubular member 7, and the levers 1 8 may be alternatively actuated by ropes and pulleys or by other means. Also, limit switches may be provided if desired to limit the movement of the levers, and on very slow machines the roller 21 may be replaced by a fixed bar which may incorporate the cutter blade.

Claims

1. In apparatus of the kind aforesaid, mechanism for the purpose aforesaid, said mechanism comprising a first pair of levers pivotally connected, respectively, to the lower ends of a second pair of levers whose upper ends are pivotally connected respectively to said arms, a transverse guide for supporting an end portion ol paper and a cutter blade carried by free ends of said first pair of levers, means for actuating the latter to bring the paper on said guide into engagement with a lower portion of the reel, and means for actuating the second pair of levers to wrap the paper around the reel and to bring the guide and the paper into a position directly above and adjacent the nip between the drum and the reel, whereby an operator holding the free end of the paper can allow the paper to feed folded into the nip, so that the paper is pulled down on to the cutter blade and the free end portion of the paper is cut-off.

2. Mechanism as claimed in claim 1, wherein said first pair of levers are pivotally connected intermediate their ends to the second pair of levers, one free end of each lever of the first pair is pivotally connected to one of said upstanding pivoted arms, and the other free ends of said levers of the first pair are connected by a roller providing said transverse guide.

3. Mechanism claimed in claim 2, wherein said one free end of each lever of said first pair is pivotally connected to one of said arms by a respective one of two fluid-operated rams forming said actuating means for said first pair of levers.

4. Mechanism as claimed in any one of claims 1 to 3, wherein said means for actuating the levers of said second pair comprises a fluid operated ram pivotally connected through a pin to a lug on a tubular member with bearings extending around a cross shaft on which said upstanding arms are pivoted at the lower ends thereof.

5. In apparatus of the kind aforesaid, mechanism for the purpose aforesaid substantially as hereinbefore described with reference to Figs. 3 and 4 of the accompanying drawings.