GB2189269A - Single facer for corrugated beard making apparatus - Google Patents

Description

GB 2 189 269 A 1 SPECIFICATION Figure 6,two inclined sliders 30 of

rectangular cross-section are mounted on the rod 23 at spaced Single facerforcorrugated board making. apparatus positions corresponding to the bearing portions of the press roll 3. The inclined surface of each slider is held The present invention relates to single facers for 70 in slide contactwith an end portion of another corrugated board making apparatus, and more parti- corresponding slider31 mounted on a press lever 32, cularlyto meansforfineiy adjusting the contact and this slide contact surface a hasthefunction of condition between a corrugated roll and the press roll preventing rotation of the eccentricity adjusting rod 23 of such apparatus, ie the degree of parallelism of the about its centre axis upon slide movement of the rod contact portion of the rolls. 75 23. Therefore, when the screw rod 25 is rotated, by A sing le facer of a conventional corrugated board rotating the shaft of the motor 28, the eccentricity making machine is shown in Figure 4 and comprises adjusting rod 23 threadedly engaged with the screw meshing upper and lower corrugated rolls 1 and 2 rod 25 can slide in the axial direction. As a result of this through which a core papersheet 4 is fed and shaped slide movement, the press lever32 is rotated about its into a corrugated form, a press roll 3 which is in 80 centre E of rotation via the slider31. In the central contactwith the lower corrugated roll 2, a paste tray 6 portion of the press lever32, the eccentric bush 20 and a paste applying roll 7 which is in contact with the embracing the bearing 21 forthe press roll 3 is coupled paste within the tray 6 and also in contactwith the to the press lever 32 by means of taper pins 33 and lower corrugated roll 2. Thus, after being shaped, the hence, by rotating the press lever 32, a centre C of a crests of the core sheet are pasted via the roll 7 and this 85 shaft F of the press roll 3 can be displaced.

sheetthen feeds between the rolls 2 and 3 together Due to limited precision of machine tools and the with a liner sheet 5 to produce a continuous web of like, it is almost impossible to maintain parallelism of pasted, single faced, corrugated sheet 8. the outer circumferential surface over its entire length, The rolls 1, 2 and 3 are in the form of hollow which could exceed 2000- 2500 mlm; hence, the roll cylinders and, in orderto promote shaping and 90 would be somewhat tapered. Also, it is difficuitto set pasting of the core papersheet4,the interiors of these the positions of the bearings precisely in theframe rolls are held at a high tempreature by introducing members at both ends of the press roll. Therefore, steam thereto. problems in machining and assembly may occur as The upper corrugated roll 1 is rotatably mounted at illustrated in Figure 8 in which the contact between the each end, via a bearing, on an arm 9 which is pivotally 95 rolls can varyfrom 6 at one end and 6+A6 atthe other.

mounted at one of its ends on a fixed frame member Hence, the amount of eccentricity A6 would need to be 11 via a pivot pin 10, and atthe other end it is adjusted. Accordingly, upon assembly and adjust connected via a pivot pin 14to a piston rod 13 of a ment, as an initial essential condition, it is necessaryto press cylinder. Also, the press cylinder is pivotally adjustthe degree of parallelism atthe contact portion connected to a bracket 12 fixed to the frame 11. Afixed 100 between the rolls byvarying the eccentricities at both bearing forthe respective end of the lower corrugated ends of the press roll.

roll 2 is supported between the frame 11 and the In one prior art arrangement, a shim 34 is inserted bracket 12. As shown in Figures 6 and 7, the press roll 3 between the slider 31 and the arm portion of the press has each of its opposite ends pivotably supported by a lever32 as shown in Figure 6. In another arrangement, bearing 21, which is embraced by an eccentric bush 105 as shown in Figure 9, the eccentricity adjusting rod 23 20, and this eccentric bush 20 is rotatably supported is in two sections, which, however, are connected by a frame member 11 via a bush 22. togethervia a screw rod 35threaded with a left-hand The contact condition, (iethe degree of parallelism) screw and a right- hand screw. In this case, the between the respective rolls, including the rela- directions of the press lever 32 are changed by tionship between the lower corrugated roll 2 and the 110 adjusting the mounting angles of the eccentric bushes press roll 3, is one ofthe most important factors for 20,to varythe contact positions of thetwo spaced realizing homogenization of thethickness of the slide surfaces a.

corrugated board and the pasted condition between Lock nuts 36 are provided to maintain the adjusted the core paper sheet 4 and the liner 5 in the width-wise length of the rod and a flange 37 is provided for direction of the corrugated board. Hence, for main- 115 rotating the coupling screw rod 35. However, depend taining the quality of the product, reliable adjustment ing upon thethickness of the corrugated board across of the contact condition is required. itswidth and the pasted condition between the core Heretofore, adjustment for the degree of parallelism papersheet4 and the liner5, in some cases, contrary between the lower corrugated roll 2 and the press roll to the above description, adjustment maybe effected

3 has been carried out using an arrangement as shown 120 so thatthe contact portion between the rolls 2 and 3 is in Figures 5to 7. Thus, an eccentricity adjusting rod 23 not maintained parallel.

extends across the width of the press roll 3 and In the prior art arrangements described above, opposite end portions are pivotably supported from because the adjustments atthe opposite ends of the the frame members 11 via slide bushes24s.Q as to. be press roll need to be effected simultaneously, com- slidable in the axiaL direction, and one end portion of 125 plex adjustment manipulations on a try-it-and-see the rod is tapped with a female screw to be th readedly basis, such as by the insertion of different shims, are engaged with a screw rod 25. A part of the screw rod necessitated; hence, a long period of time and a high is pivotably supported from a boss 27 via a bearing degree of technique in effecting adjustment is re 26, and its tip end is axially connected via a shaft quired.

coupling 29to the shaft of a motor 28. As shown in 130 Moreover, each time adjustment is effected, it is 2 GB 2 189 269 A 2 necessaryto stopthe operationofthe machine, with the direction of arrows; consequential effects on productivity. Figure 7 is a detailed longitudinal cross-section view An object of the present invention is to provide a of the lower portion in Figure 6; singlefacer in which adjustmentof the degree of Figure 8 is a diagrammatic view for explaining parallelism between cooperating rolls can be 70 problems involved in a conventional singlefacer; and achieved simply and in a reliable manner,without Figure 9 is a schematic cross-section viewshowing necessitating a lot of time, or a high degree of a prior arrangementfor adjusting eccentricities at,Ihe techinque. respective ends of a roll shaft.

According to the present invention, there is pro- One preferred embodiment of the present invention vided a single facerfor producing single-faced card- 75 will be described with reference to Figures 1, to 4 and 7.

board sheets, comprising a pair of cooperating The single facer is generally of conventional design corrugated rolls and a press roll cooperating with one as described hereinbefore with referenceto Figure 4.

of the corrugated rolls; characterized in that a pair of Thus, it has upper and lower corrugated rolls 1 and 2, adjustment means is provided having bearings which and a press roll 3. A core papersheet 4 is fed through rotatably support opposite ends of said press roil, 80 the rolls 1 and 2for shaping and the crests of the each adjustment means being rotatably mounted on a corrugations formed are pasted by a paste applying supportforthe respective end of the press roil in such roll 7. The shaped sheet is then fed through the rolls 2 a mannerthattheir centre of rotation is eccentricfrorn and 3 togetherwith a liner sheet 5 to form a the axis of said press roll, and in that drive means are continuous web of single faced corrugated sheet 8.

providedforeach adjustment meansfor adjusting 85 Also, as shown in Figure 4, the upper roll 1 is mounted their degree of eccentricity independently of the other. on an arm 9 pivoted at one end to the frame 1 1,the Both adjustment means may be moved in a other end being pivoted to a press cylinder 14 which, correlated manner if required by synchronising the in turn, is pivoted totheframe 11 via a bracket 12. Also, drive means, eg via a controller. asshown particularlyin Figure 7,the press roll 3 is Each adjustment means may comprise an eccentric- 90 supported ateach encivia a bearing 20 mounted ityadjusting rod which is in two parts comprising a within an eccentric bush 21, in turn rotatably mounted screw rod threadedly engaged axiallywith oneend of in afurtherbush 22 set in an aperturethrough the a further rod,which is axially slidablewith respectto frame 11.

its support, slide movement being effected by rotation Referring now particularlyto Figure 3-a, for each of its drive means, conveniently an electric motor. 95 end of the press roll 3, an adjustment arrangement is In accordance with the present invention, eccentrici- provided comprising a screw rod 25 rotatably ties caused bytapering of the rolls andlor deviations in mounted via a bearing 26 in a boss 27, which can be position of the end bearings of each roll, can be rotated by an electric motor 28 via a shaft coupling 29 attended to, and hence adjustment overthe entire to move a slider30 and, hence, another cooperating length of the roll can be made by simple manipula- 100 slider31. Referring also to Figure 2, the slider31 is tions. mounted on a press lever32 coupled to the roll 3 by Moreover, there is no need to stop operation of the taperpins33.

machine to effect adjustment, and the adjustment can In accordance with the invention, referring to Figure be carried out while checking the condition of the 3-a, a separate eccentricity adjustment means is corrugated board sheet being produced. 105 provided at each end of the press roil 3 comprising a The above-mentioned and other objects, features rod40which has a slide bush 41 mounted within a and advantages of the present invention will become bracket41. Afurther slide bush 43 is mounted within more apparent by reference to the following descrip- an aperture in the respective frame member 11. As tion of one preferred embodiment of the invention shown in Figure 2, each adjusting arrangement also taken in conjunction with the accompanying draw- 110 includes a cylinder45 pivoted at one end on a pin 44 ings, in which:- and at its other end on a yoke pin 46.

Figure 1 is a schematic partial cross-section view of In more detail, as shown in Figure 3-a, for each end a part of a roll pressure adjusting device in a single of the press roll 3, one end of the eccentricity adjusting faceraccording to the present invention; rod 40 is supported bythe bracket42 via theslide bush Figure 2 is a detailed transverse cross-section view 115 41, and the other end is supported bytheframe taken along thetwo lines B-B in Figure 1 as viewed in member 11 in an axially slidable mannervia the slide the direction of arrows; bush 43. The eccentricity adjusting rod has afernale Figure 3-a is a detailed longitudinal cross-section screw tapped at its outer end and isthreadedly view of the part C in Figure 1; engaged with one end of the screw rod 25. In addition, Figure 3-b is a detailed transverse cross-section 120 a part of the scrEw rod 25 is rotatably supported bythe viewtaken along line D-D in Figure 3-a as viewed in the boss 27 via the bearing 26. The other end of the SCFew d i recti o n of a rrows; rod 25 is axially coupled with the shaft of the electric Figure 4 is a-schematic view showing the general motor 28 via the shaft coupling 29, and so, the arrangement of the rolls of a single facer of a eccentricity adjusting rod 40 ca n be made to slide in corrugated board making machine; 125 the axial direction a predetermined distance by Figure 5 is a schematic partial cross-section view of appropriate rotation of the shaft of the electric motor a part of a roll pressure adjusting device in a 28. The slider 30 having an inclined surface is fixedly heretofore known singlefacer; secured to one portion of the rod 40, and the press Figure 6 is a detailed transverse cross-secton view lever32 rotateswith the slider30via the slider31 taken along the two lines E-E in Figure 5, as viewed in 130which is held in contact with the former slider30 at a 3 GB 2 189 269 A 3 surface a and slides along that surface a. Asshown in includean eccentricity adjusting rodwhich is axially Figure2,asa resultof rotation of the press lever32,the slidablewith respectto itssupport, slide movement eccentric bush 20which is connected to the press lever thereof being controlled by said drive means.

Claims (3)

1. 32via the taper piris,33 is rotated, and therebythe 4. A single facer as

   claimed in Claim 3, characte embraced bearing 2.1 for the press roll 3, and hence 70 rised in that said eccentricity adjustment rod is in two the centre C of the press roll shaft, are displaced. parts comprising a screw rod threadedly engaged Atthe arm section of the press lever32, which has a axially with one end of a further rod which is axially construction as shown in Figure 7, the cylinder 45 is slidable, and slide movement is effected bythe drive pivotally coupled to the press lever 32 via the pin 44, means rotating said screw rod.

   andthe head of the cylinder45 is likewise pivotally 75 5. Asinglefacer as claimed in anyone of the mounted on theframe member 11 via the yoke pin 46. preceding claims, characterised in that said adjust Afterthe mounting angle of the eccentric bush 20 has ment means include a bearing mounted within an been established,the press lever32 is pressed against eccentric bush, in turn rotatably mounted in a further theframe member 11 and held in position bythe bush set in an aperturethrough its support.

   1S cylinder45and theslider30. 80 6. A single facer constructed, arranged and Thus, adjustment to setup the eccentricities of the adapted to operate substantially as hereinbefore shaft of the press roll 3 can be readily and simply described with referenceto Figures 1 to 4 and 7 of the carried outat each end of said press roll. It is to be accompanying drawings.

   noted that, afterthe initial adjusted condition has been established,the adjustment arrangement at both ends Printed in the United Kingdom for Her Majesty's Stationery Office by the Tweeddale Press Group, 8991685, 10187 18996. Published at the Patent Office, of the press roll can be operated in unison by 25 Southampton Buildings, London WC2A lAY, from which copies may be sychronizing both electric motors 28, by means of a obtained.

   controller47.

   With the roll pressure adjusting system in accord ancewith the present invention, sincethe degrees of eccentricity atthe ends ofthe press roll can be individually set up quickly in a simple mannerwithout necessitating a high degree of technique, precision in working and assembly of the roll can be established fairly easily. Thus, there isthe advantage thatthe labour expense forworking, assembly and adjust mentcan be greatly reduced. Also, depending upon the thickness of the corrugated board sheets, the pasting condition between the corrugated core paper sheet and the liner, and the like, it is possibleto improve the quality of the product by adjusting the rolls 2 and 3 so thatthey are not necessarily parallel.

   Furthermore, since these adjustments can be carried out even during operation of the machine, there is no need to stop it, with a consequent improvement in production.

   Since widely different embodiments can be made without departing from the scope of the present invention set out in the appended claims, it is intended that above description shall be interpreted to be illustrative only.

   CLAIMS 1. A single facer for producing sing le-faced ca rd board sheet, comprising a pair of cooperating corru 5G gated rolls and a press roll cooperating with one of the corrugated rolls; characterized in that a pair of adjustment means is provided having bearings which rotatably support opposite ends of said press roll, each adjustment means being rotatably mounted on a supportforthe respective end of the press roll in such mannerthattheir centre of rotation is eccentricfrom the axis of said press roll, and in that drive means are provided for each adjustment meansfor adjusting their degree of eccentricity independently of the other.
2. 2. A single facer as claimed in Claim 1, characterised in that said pair of adjustment means are moved in unison, if required, by synchronizing operation of their respective drive means.
3. 3. Asinglefaceras claimed in Claim 1 or2, characterised in that each said adjustment means