US20130200566A1 - Driven nip rolls for sheet stacker infeed - Google Patents
Driven nip rolls for sheet stacker infeed Download PDFInfo
- Publication number
- US20130200566A1 US20130200566A1 US13/367,783 US201213367783A US2013200566A1 US 20130200566 A1 US20130200566 A1 US 20130200566A1 US 201213367783 A US201213367783 A US 201213367783A US 2013200566 A1 US2013200566 A1 US 2013200566A1
- Authority
- US
- United States
- Prior art keywords
- nip roll
- drive system
- set forth
- sprocket
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
- B65H29/12—Delivering or advancing articles from machines; Advancing articles to or into piles by means of the nip between two, or between two sets of, moving tapes or bands or rollers
- B65H29/14—Delivering or advancing articles from machines; Advancing articles to or into piles by means of the nip between two, or between two sets of, moving tapes or bands or rollers and introducing into a pile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2403/00—Power transmission; Driving means
- B65H2403/30—Chain drives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/10—Rollers
- B65H2404/14—Roller pairs
- B65H2404/147—Roller pairs both nip rollers being driven
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/17—Nature of material
- B65H2701/176—Cardboard
- B65H2701/1762—Corrugated
Definitions
- Corrugated paperboard sheets produced on the dry end of a corrugator are typically shingled and then delivered to a downstacker bay where the sheets are squared in a uniform stack fed by a stacker infeed nip.
- the sheets exiting the nip and delivered to the stacker descend with the infeed of sheets until a stack of a desired number of sheets or height is achieved whereupon the stack is removed and the stack support is returned to a position adjacent the infeed nip.
- Prior art stacker infeed nips have typically used a driven bottom roll and an idler top roll with a cushioning or zero crush cylindrical contact surface.
- back slip or shingle compression can occur, particularly if there are quality problems with the sheets being stacked.
- Back slip or shingle compression may result in the buildup of too much pressure in the nip and can result in product jam. Poor product quality may also cause a jam at the stacker infeed nip. When this occurs, cross machine direction slip of the sheets entering the stacker bay is also a problem.
- FIG. 1 is a schematic side elevation of a portion of a corrugator dry end showing the positioning of the new nip roll drive system of the present invention.
- FIG. 2 is an enlarged side elevation of the nip roll drive system.
- FIG. 3 is a top perspective view of the drive system taken from the opposite side.
- FIG. 4 is a rear perspective view of the system looking in the downstream direction.
- FIG. 5 is a top plan view of the system with the head pulley and bottom nip roll removed.
- the dry end 1 of a corrugator typically includes two downstackers 2 , each receiving a stream of shingled sheets from a flat belt conveyor 3 comprising one of a flat belt conveyor system that controls shingle movement and coordinates discharge into one of the downstackers 2 , all in a manner well known in the art.
- Each of the downstackers 2 includes a stacker bay 7 into which the shingled sheets are fed in a stream.
- the assembly of a stacker infeed nip 10 is mounted between a pair of side frame members 5 at the upper inlet 6 to a downstacker bay 7 and includes a bottom nip roll 11 and a top nip roll 12 , both of which are driven in synchronization by a head pulley 13 of the last flat belt conveyor 3 .
- the bottom nip roll 11 is of conventional construction, as is the larger top nip roll 12 which preferably has a zero crush surface 14 .
- the zero crush top nip roll 12 is simply an idler roll with the zero crush surface that provides normal force on the corrugated sheets being delivered through the nip 10 into the stacker bay 7 .
- An arrangement is typically provided to apply a variable normal force to the zero crush roll and the sheets passing through the nip.
- a first driving connection is provided by connecting a head pulley sprocket 15 on one end of the head pulley 13 to a bottom nip roll sprocket 17 mounted on the nip roll shaft 16 .
- the sprockets 15 and 17 are connected by a bottom nip roll drive belt or chain 18 receiving its driving rotation from the head pulley 13 ,
- This and the other driving connection may utilize either a steel roller chain or a reinforced rubber timing belt. As used herein, the terms are interchangeable.
- a second driving connection is made between a second head pulley sprocket 20 (preferably mounted on the opposite end of the head pulley) and a first idler sprocket 21 mounted for rotation on a stub shaft 19 above the head pulley 13 .
- the driving connection is made by a belt or chain 22 .
- the stub shaft 19 is secured in the end of a tubular member 27 forming part of a support bracket 23 for the top nip roll 12 .
- a third driving connection is provided between a second idler sprocket 24 rotatably mounted on the stub shaft 19 next to the first idler sprocket 21 .
- the second sprocket 24 is provided with a driving connection to a top nip roll sprocket 25 by a nip roll drive belt or chain 26 .
- Stub shaft 19 is fixed in and provides a pivot axis for the support bracket 23 .
- Idler sprockets 21 and 24 are connected together so that sprocket 24 drives sprocket 25 via chain 26 .
- Sprockets 21 and 24 are journalled together on one of the bearings that ride on stub shafts 19 at opposite ends of the tubular member 27 .
- the nip roll support bracket 23 includes the tubular member 27 that is coaxial with and carries the stub shafts 19 , which are welded to the ends of tubular member 27 to provide the pivot axis.
- the support bracket includes a pair of parallel bracket arms 28 rigidly secured to the tubular member 27 and rotatably supporting the top nip roll shaft 30 , carrying the top nip roll, at their respective opposite ends,
- the stub shafts 19 are carried in end bearings 40 attached to the side frame members 5 .
- the nip roll support bracket 23 is strengthened and made more rigid with triangular gussets 29 at the connections of the bracket arms 28 to the tubular member 27 .
- An actuator arrangement 31 operatively connects the side frame members 5 to the stub shafts 19 to adjust the vertical position and nip force of the top nip roll 12 .
- the actuator arrangement preferably comprises a pair of fluid cylinders, and more preferably, air cylinders 34 .
- the rod ends of the air cylinders 34 are connected to the ends of the stub shafts 19 with pivot arms 35 such that the cylinders operate to move the top nip roll 12 generally vertically with respect to the bottom nip roll 11 to adjust the nip force applied to the shingled sheets pulled through the nip 10 .
- the top nip roll 12 preferably comprises a zero-crush roll 14 to enhance the cushioning effect on the sheets passing through the nip 10 .
- the first driving connection between the head pulley 13 and the bottom nip roll 11 is positioned on one lateral side of the drive system.
- the second driving connection between the head pulley 13 and the sprocket 21 , and the third driving connection between the sprocket 24 and the top nip roll 12 are positioned adjacent one another on the other lateral side of the drive system.
- the second driving connection includes a pair of upper idler sprockets 32 that are mounted on one of the side frame members 5 and horizontally spaced above one end of the stub shaft 19 and around which the chain 22 operates.
- An adjustable chain tensioner 33 is mounted between the upper idler sprockets 32 .
- the chain 22 is back-wrapped around the sprocket 21 to provide a driving connection in a compact assembly and ample room for the top nip roll support bracket 23 and other components of the system.
- Tension in the top nip roll drive chain 26 is maintained by a drive belt or chain tensioner 37 that includes a tensioner sprocket 38 mounted to engage the upper run of the drive chain 26 and adjustable vertically by a lower adjustment screw 39 attached to one of the bracket arms 28 .
- the infeed nip 10 uses the same motor driving the flat belt conveyor 3 to drive the bottom and top nip rolls 11 and 12 . This provides a significant reduction in cost and improvement in overall reliability.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
Abstract
Description
- Corrugated paperboard sheets produced on the dry end of a corrugator are typically shingled and then delivered to a downstacker bay where the sheets are squared in a uniform stack fed by a stacker infeed nip. The sheets exiting the nip and delivered to the stacker descend with the infeed of sheets until a stack of a desired number of sheets or height is achieved whereupon the stack is removed and the stack support is returned to a position adjacent the infeed nip.
- Prior art stacker infeed nips have typically used a driven bottom roll and an idler top roll with a cushioning or zero crush cylindrical contact surface.
- In stackers utilizing a single bottom drive roll for the infeed nip, “back slip” or shingle compression can occur, particularly if there are quality problems with the sheets being stacked. Back slip or shingle compression may result in the buildup of too much pressure in the nip and can result in product jam. Poor product quality may also cause a jam at the stacker infeed nip. When this occurs, cross machine direction slip of the sheets entering the stacker bay is also a problem.
- It has been found that driving the top nip roll in synch with the driven bottom nip roll can avoid all of the foregoing problems. The driven top nip roll prevents back slip under heavy drive conditions as the shingle is driven from both the top and the bottom. This also addresses and alleviates the problem of cross machine direction slip which, as indicated, reduces stack quality. Finally, a lower nip force is sufficient to adequately handle the shingle of sheets being delivered to the downstacker which further minimizes the chances of board crush.
-
FIG. 1 is a schematic side elevation of a portion of a corrugator dry end showing the positioning of the new nip roll drive system of the present invention. -
FIG. 2 is an enlarged side elevation of the nip roll drive system. -
FIG. 3 is a top perspective view of the drive system taken from the opposite side. -
FIG. 4 is a rear perspective view of the system looking in the downstream direction. -
FIG. 5 is a top plan view of the system with the head pulley and bottom nip roll removed. - As is shown schematically in
FIG. 1 , thedry end 1 of a corrugator typically includes two downstackers 2, each receiving a stream of shingled sheets from aflat belt conveyor 3 comprising one of a flat belt conveyor system that controls shingle movement and coordinates discharge into one of the downstackers 2, all in a manner well known in the art. Each of the downstackers 2 includes astacker bay 7 into which the shingled sheets are fed in a stream. - The assembly of a stacker infeed
nip 10 is mounted between a pair ofside frame members 5 at theupper inlet 6 to adownstacker bay 7 and includes abottom nip roll 11 and atop nip roll 12, both of which are driven in synchronization by ahead pulley 13 of the lastflat belt conveyor 3. Thebottom nip roll 11 is of conventional construction, as is the largertop nip roll 12 which preferably has a zerocrush surface 14. In the prior art, the zero crushtop nip roll 12 is simply an idler roll with the zero crush surface that provides normal force on the corrugated sheets being delivered through thenip 10 into thestacker bay 7. An arrangement is typically provided to apply a variable normal force to the zero crush roll and the sheets passing through the nip. - A first driving connection is provided by connecting a
head pulley sprocket 15 on one end of thehead pulley 13 to a bottomnip roll sprocket 17 mounted on thenip roll shaft 16. Thesprockets chain 18 receiving its driving rotation from thehead pulley 13, This and the other driving connection may utilize either a steel roller chain or a reinforced rubber timing belt. As used herein, the terms are interchangeable. - A second driving connection is made between a second head pulley sprocket 20 (preferably mounted on the opposite end of the head pulley) and a first idler sprocket 21 mounted for rotation on a
stub shaft 19 above thehead pulley 13. The driving connection is made by a belt orchain 22, Thestub shaft 19 is secured in the end of atubular member 27 forming part of asupport bracket 23 for thetop nip roll 12. - A third driving connection is provided between a second idler sprocket 24 rotatably mounted on the
stub shaft 19 next to thefirst idler sprocket 21. Thesecond sprocket 24 is provided with a driving connection to a topnip roll sprocket 25 by a nip roll drive belt orchain 26.Stub shaft 19 is fixed in and provides a pivot axis for thesupport bracket 23. Idlersprockets chain 26.Sprockets stub shafts 19 at opposite ends of thetubular member 27. - The nip
roll support bracket 23 includes thetubular member 27 that is coaxial with and carries thestub shafts 19, which are welded to the ends oftubular member 27 to provide the pivot axis. - The support bracket includes a pair of
parallel bracket arms 28 rigidly secured to thetubular member 27 and rotatably supporting the topnip roll shaft 30, carrying the top nip roll, at their respective opposite ends, Thestub shafts 19 are carried inend bearings 40 attached to theside frame members 5. The niproll support bracket 23 is strengthened and made more rigid withtriangular gussets 29 at the connections of thebracket arms 28 to thetubular member 27. - An
actuator arrangement 31 operatively connects theside frame members 5 to thestub shafts 19 to adjust the vertical position and nip force of thetop nip roll 12. The actuator arrangement preferably comprises a pair of fluid cylinders, and more preferably,air cylinders 34. The rod ends of theair cylinders 34 are connected to the ends of thestub shafts 19 withpivot arms 35 such that the cylinders operate to move thetop nip roll 12 generally vertically with respect to thebottom nip roll 11 to adjust the nip force applied to the shingled sheets pulled through thenip 10. As indicated above, thetop nip roll 12 preferably comprises a zero-crush roll 14 to enhance the cushioning effect on the sheets passing through thenip 10. - The first driving connection between the
head pulley 13 and thebottom nip roll 11 is positioned on one lateral side of the drive system. The second driving connection between thehead pulley 13 and thesprocket 21, and the third driving connection between thesprocket 24 and thetop nip roll 12 are positioned adjacent one another on the other lateral side of the drive system. - The second driving connection includes a pair of
upper idler sprockets 32 that are mounted on one of theside frame members 5 and horizontally spaced above one end of thestub shaft 19 and around which thechain 22 operates. Anadjustable chain tensioner 33 is mounted between theupper idler sprockets 32. As may best be seen inFIG. 4 , thechain 22 is back-wrapped around thesprocket 21 to provide a driving connection in a compact assembly and ample room for the top niproll support bracket 23 and other components of the system. - Tension in the top nip
roll drive chain 26 is maintained by a drive belt orchain tensioner 37 that includes atensioner sprocket 38 mounted to engage the upper run of thedrive chain 26 and adjustable vertically by alower adjustment screw 39 attached to one of thebracket arms 28. - In addition to the improvements in stacker nip performance, the
infeed nip 10 uses the same motor driving theflat belt conveyor 3 to drive the bottom andtop nip rolls
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/367,783 US8500121B1 (en) | 2012-02-07 | 2012-02-07 | Driven nip rolls for sheet stacker infeed |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/367,783 US8500121B1 (en) | 2012-02-07 | 2012-02-07 | Driven nip rolls for sheet stacker infeed |
Publications (2)
Publication Number | Publication Date |
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US8500121B1 US8500121B1 (en) | 2013-08-06 |
US20130200566A1 true US20130200566A1 (en) | 2013-08-08 |
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ID=48876269
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/367,783 Expired - Fee Related US8500121B1 (en) | 2012-02-07 | 2012-02-07 | Driven nip rolls for sheet stacker infeed |
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US (1) | US8500121B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106868721A (en) * | 2017-03-06 | 2017-06-20 | 宁波舒普机电股份有限公司 | A kind of adhesive tape material fetching mechanism for sewing |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6595349B2 (en) * | 2000-08-24 | 2003-07-22 | Hazmac (Handling) Limited | Article transferring device |
US20060225992A1 (en) * | 2003-03-27 | 2006-10-12 | Katsuyoshi Tachibana | Chain-driving mechanism and conveyor apparatus |
US20080237974A1 (en) * | 2007-03-28 | 2008-10-02 | Xerox Corporation | Systems and methods for reducing registration errors in translating media shaft drive systems |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3022999A (en) | 1959-05-25 | 1962-02-27 | Lamb Grays Harbor Co Inc | Spring loaded pivoted forward stop for paper stacking mechanism |
US4919414A (en) | 1988-09-29 | 1990-04-24 | Marquip, Inc. | Handling, including squaring, of conveyed shingled sheets |
US5160129A (en) | 1991-08-27 | 1992-11-03 | Ward Holding Company, Inc. | Sheet stacking |
US5613673A (en) | 1995-08-15 | 1997-03-25 | Marquip, Inc. | Sheet stacking apparatus |
US6103171A (en) | 1998-05-11 | 2000-08-15 | Marquip, Inc. | Method and apparatus for facilitating a gapless order change in a corrugator |
US6145833A (en) | 1998-06-02 | 2000-11-14 | Marquip, Inc. | Rotary brush sheet deceleration device |
DE19945114A1 (en) | 1999-09-21 | 2001-03-22 | Jagenberg Papiertech Gmbh | Device for cross-cutting material webs, in particular cardboard webs |
-
2012
- 2012-02-07 US US13/367,783 patent/US8500121B1/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6595349B2 (en) * | 2000-08-24 | 2003-07-22 | Hazmac (Handling) Limited | Article transferring device |
US20060225992A1 (en) * | 2003-03-27 | 2006-10-12 | Katsuyoshi Tachibana | Chain-driving mechanism and conveyor apparatus |
US20080237974A1 (en) * | 2007-03-28 | 2008-10-02 | Xerox Corporation | Systems and methods for reducing registration errors in translating media shaft drive systems |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106868721A (en) * | 2017-03-06 | 2017-06-20 | 宁波舒普机电股份有限公司 | A kind of adhesive tape material fetching mechanism for sewing |
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US8500121B1 (en) | 2013-08-06 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: MARQUIP, LLC, WISCONSIN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PAULSON, RICHARD F.;KROG, JAMES M.;REEL/FRAME:028526/0089 Effective date: 20120710 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees |
Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.) |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20170806 |
|
AS | Assignment |
Owner name: BARRY-WEHMILLER PAPERSYSTEMS, INC., MISSOURI Free format text: MERGER;ASSIGNOR:MARQUIP, LLC;REEL/FRAME:053500/0678 Effective date: 20171220 |