US3915264A - Double adjusting brakes used for cutter unreel or like - Google Patents

Double adjusting brakes used for cutter unreel or like Download PDF

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Publication number
US3915264A
US3915264A US472148A US47214874A US3915264A US 3915264 A US3915264 A US 3915264A US 472148 A US472148 A US 472148A US 47214874 A US47214874 A US 47214874A US 3915264 A US3915264 A US 3915264A
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United States
Prior art keywords
brake
levers
paper
adjusting
pair
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Expired - Lifetime
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US472148A
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English (en)
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Tadao Ohi
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/06—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle

Definitions

  • This invention relates to a double adjusting brake device adapted for use in a cutter unreel or the like.
  • the present invention proposes an improved brake device adapted for use in a cutter unreel or the like for braking each paper roll by pressing brake shoes by levers against a brake drum rotating with said paper roll, characterized in that a pressing mechanism utilizing fluid pressure and an adjusting mechanism for adjusting the force transmitted from said pressing mechanism to the brake shoes are provided in operative association with said levers to thereby make suitable adjustment of the braking force for each paper roll.
  • This brake unit is provided for each of a plurality of paper rolls arranged in juxtaposed relation horizontally in two lines and pressurized fluid with a certain given pressure is supplied to each of the pressing mechanisms through common piping to push the levers so as to exert a regulated braking force to each brake shoe.
  • the pressing mechanisms are operated separately to adjust the force applied to the brake shoes from each pressing mechanism so as to give an optimal braking force to each of the paper rolls.
  • the paper strip from any of the paper rolls is supplied to the cutter assembly always with optimum tension.
  • combined tension of the lapped paper strips supplied under this condition is checked constantly, and if the checked value of tension is reduced as the paper roll diameter decreases with advance of paper feed, the pressure regulating valve in the common piping is throttled accordingly to lower fluid pressure supplied to each pressing mechanism, so
  • FIG. 1 is a front view showing an embodiment of the brake unit according to the present invention
  • FIG. 2 is a side elevation thereof
  • FIG. 3 is a front view of a partly modified brake unit according to the present invention.
  • FIG. 4 is a cross-sectional view of a modified form of adjusting mechanism
  • FIG. 5 is a general diagrammatic view of a cutter unreel assembly adapted with the brake units according to the present invention.
  • reference numeral 1 designates a paper roll which carries on its both sides the brake drums 2 so that said drums are rotatable in unison therewith.
  • Disposed on both sides of each said brake drum 2 are a pair of brake levers 3, 3 which have their lower bent ends pivotted at 5 to a retainer member 4 while the upper ends thereof are pivottally secured to the respective brake shoes 6, 6 which are pressed against said brake drum 2.
  • a box-like square hollow structure 7 held between the two lever portions through flanges a, and a square prism-like body 8 is secured by a pin 9 in the inside of each said box-like structure 7.
  • a clamping shaft 10 is passed through both square bodies 8, 8. On the portion of said shaft 10 extending out from one of said square bodies 8 ismounted a flexible cylinder 13 disposed airtightly between an end plate 11 fixed to said shaft 10 and another end plate 12 secured to said square body 8. Pressurized fluid is fed into said cylinder 13 from a fluid inlet hole 14 provided in the shaft 10 so as to press the square body 8. These means constitute a pressing mechanism A.
  • the portion of said shaft on the opposite side is threaded at 15 along substantially half of the length of said portion, and a pair of adjusting nuts l6, 16 are threadedly engaged with said threaded portion so as to hold the square body 8 in position.
  • the distance between the levers 3, 3 can be reduced through relative adjustment of said nuts in accordance with wear of the brake shoes 6, 6.
  • Intermediate the shaft 10 is threadedly secured an adjusting nut 17, and a brake releasing spring 18 is disposed between said nut 17 and the square body 8 on the side of the pressing mechanism A.
  • B, B designate adjusting mechanisms for adjusting the force applied to the respective brake shoes 6, 6 from the pressing mechanism A by changing the positions of the respective slidable square structures 7, 7.
  • Each said adjusting mechanism B comprises a downwardly extending feed screw 19 to which is threadedly engaged a pin wheel nut 21 held by a fixed frame 20, said pin wheel nut 21 being turned by a pin wheel 27 mounted on a shaft 26 connected to a handle 22 through gears 24, 25 and a shaft 23 so that when said handle 22 is turned, said feed screw' 19 is urged to make corresponding turning motion to move the slidable square structure 7, which serves as better dynamic point of the associated lever 3, thereby to make adjustment of the force.
  • reference numeral 28 designates a paper roll having mounted on its both sides the brake drums 29 rotatable with said paper roll.
  • a pair of brake levers 30, 30 Disposed on both sides of each said brake drum 29 are a pair of brake levers 30, 30 which have their lower ends pivotted at 32, 32 to a retainer member 31.
  • a brake shoe 33 pressed against the brake drum 29.
  • the upper end of each said brake lever 30 is secured to a square prism-like body 34 by a pin 35.
  • a clamping shaft 36 is passed through the square bodies 34, 34 on both sides.
  • a thread 37 At the portion of said shaft extending out from one of said square bodies 34 is formed a thread 37, and provided at this threaded portion is an operating block 39 held between a pair of adjusting nuts 38, 38.
  • an operating block 39 held between a pair of adjusting nuts 38, 38.
  • a thread 40 With which are threadedly engaged a pair of adjusting nuts 41, 41 holding a square body 34 therebetween.
  • the distance between the levers 30, 30 can be narrowed through relative adjustment of these adjusting screws in conformity to wear of the shoes 33, 33.
  • Intermediate the shaft 36 is threadedly secured an adjusting nut 42, and a brake release spring 43 is interposed between said adjusting nut 42 and one of the square bodies 34.
  • Numeral 44 indicates an operating lever which is pivotted at its upper end to the operating block 39 by a pin 45. Said operating lever 44 is also provided at its lower end with a cylindrical portion 46 through which a clamping shaft 47 is passed. An end of said shaft 47 is secured to a metal block 48 which is loosely mounted on a shaft 32 pivotted to the lower end of the lever 30. At the portion of said shaft 47 extending from the cylindrical portion 46 is airtightly mounted a flexible cylinder 51 disposed between an end plate 49 secured to said shaft 47 and another end plate 50 secured to the cylindrical portion 46. Pressurized fluid is fed into the inside of said flexible cylinder 51 from a fluid inlet hole 52 formed in said shaft 47 so as to press the cylindrical portion 46.'These means constitute a pressing mechanism A.
  • Said adjusting mechanism B designates an adjusting mechanism which moves between the operating lever 44 and brake lever 30 to change the position of fulcrum of the operating lever 44 to thereby adjust the force applied to the shoes 33, 33 from the pressing mechanism A.
  • Said adjusting mechanism B comprises a slidable frame 53 in which is formed a triangular roll hole 54 having its apex on the side of the brake lever 30 and its bottom on the side of the operating lever 44, and in said hole 54 are disposed a fulcrum roll 55 contacting the brake lever 30 and two support rolls 56, 56 contacting said fulcrum roll 55 and operating lever 44, respectively.
  • Fine teeth or knurls b are provided on the peripheral faces of said three rolls 55, 56, 56 and they are meshed with each other so that when said fulcrum roll 55 is turned by a square shaft 57, the slidable frame 53 is allowed to move freely to change the fulcrum position to thereby effect adjustment of force.
  • Numeral 58 refers to a setscrew for fixing the slidable frame 53 at a desired location. Said setscrew 58 is passed through a washer 59 abutting against the outerside of the operating lever 44 and its end is screwed into a bearer 60 attached to the slidable frame 53 so that when it is fastened by turning the handle 61, said slidable frame 53 is fixed in position.
  • CL designates a cutter unreel assembly in which a plurality of paper rolls are arranged sidewise in two upper and lower lines, with said brake device (shown in FIGS. 3 and 4) being provided to each of said paper rolls.
  • the paper strips unreeled from the respective paper rolls 1, l in the upper and lower lines are fed into a cutter device (not shown in the drawing) through movable rolls 62, 62, which are biased with decrease of diameter of the paper rolls from which paper strips are unreeled, and a fixed roll 63.
  • the composite tension is detected by a detector 64 and the detected value is converted into an electric signal by a converter 65, said signal being relayed to an automatic pressure regulating valve 66 to throttle it so as to change pressure of fluid supplied into each pressing mechanism A through common piping 67 proportionally to the change of tension.
  • the tension difference occurring among the respective paper rolls due to differences of their arranged order or strain is covered by adjusting the force applied to the brake shoes 33, 33 from each pressing mechanism A by operating the adjusting mechanism B.
  • the braking force rate for the respective brake units is always maintained constant regardless of change of force given by the pressing mechanism A.
  • the brakes of the type for example shown in FIGS. 3 and 4 are adapted in a cutter unreel assembly such as shown in FIG. 5 and a fluid with a certain set pressure is supplied to the pressing mechanisms A in the brake units for the respective paper rolls 28 through common piping 67, the brake shoes 33, 33 of the respective brake units are pressed against the associated brake drums 29 at equal force to exert uniform braking force to the respective paper rolls.
  • the braking force required for a particular paper roll is differentiated from that for the other rolls accoriding to the arranged order of the rolls because a forwardly positioned paper roll receives jerking force of the rearwardly positioned roll or rolls and also because strain in each paper strip is different from that in the other paper strips.
  • the adjusting mechanisms B are operated by taking into account the above-said facts so as to suitably adjust the braking force given by the respective paper rolls, thus allowing always stable and constant paper feed.
  • each paper roll is gradually reduced in diameter as paper feed advancees it needs to correspondingly lower paper tension.
  • combined tension of paper strips is detected by a detector 64 and the detection value is converted into an electric signal by a converter 65 to thereby throttle the automatic pressure regulating valve 66 to lower the fluid pressure supplied into the respective pressing mechanisms A proportionally to tension reduction, whereby the braking force can be changed proportionally to reduction of the paper roll diameter, thus allowing automatic prosecution of the operation for giving always optimum tension to paper.
  • each paper strip is given optimum tension to travel smoothly and stably throughout the paper feeding operation. This allows precise paper cutting with almost no difference in vertical size in the cutter unit and also perfect prevention of wrinkled papers which may otherwise be produced due to too great or too low tension, and hence the product yield is markedly improved and also the non-conforming paper eliminating work is unnecessitated.
  • a double adjusting brake device for use in a cutter unreel having brake drums operatively associated with paper rolls comprising:
  • pair of brake shoes adapted to contact diametrically opposed portions of a brake drum connected to a paper roll; pair of levers carrying said brake shoes and being pivotally mounted at one end to a retainer member and being connected at the other end to a shaft means of said brake device;
  • a third operating lever disposed adjacent one of said pair of levers and pivoted thereon; a roller fulcrum pivoting said third operating lever on one of said pair of levers; a fluid pressure mechanism connected to one end of said third operating lever for exerting a force on each of said brake shoes and said shaft means connecting the other end of said operating lever to the other of said pair of levers; and fulcrum adjusting mechanism for selectively positioning said fulcrum at different positions on said one of said pair of levers to change the length of the lever arm between said roller fulcrum and said fluid pressure mechanism and thereby adjust the pressure on said brake shoes.
  • the double adjusting brake device of claim 1 including a plurality of paper rolls and a common piping for supplying fluid pressure to said fluid pressure mechanism associated with each brake drum on the paper rolls.

Landscapes

  • Unwinding Webs (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Braking Arrangements (AREA)
US472148A 1973-12-12 1974-05-22 Double adjusting brakes used for cutter unreel or like Expired - Lifetime US3915264A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48140493A JPS5089604A (sv) 1973-12-12 1973-12-12

Publications (1)

Publication Number Publication Date
US3915264A true US3915264A (en) 1975-10-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
US472148A Expired - Lifetime US3915264A (en) 1973-12-12 1974-05-22 Double adjusting brakes used for cutter unreel or like

Country Status (6)

Country Link
US (1) US3915264A (sv)
JP (1) JPS5089604A (sv)
CA (1) CA1013277A (sv)
DE (1) DE2427466B2 (sv)
GB (1) GB1467409A (sv)
SE (1) SE407051B (sv)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4302654A (en) * 1979-06-11 1981-11-24 Bennett William T Microperforation of cigarette tipping paper by use of laser beam
US4507535A (en) * 1975-12-12 1985-03-26 American Brands, Inc. Method and apparatus for perforating material
US4906334A (en) * 1989-03-27 1990-03-06 Lake Superior Paper Industries Broke pulping apparatus and reel stand with brake
US4917327A (en) * 1988-09-07 1990-04-17 H. B. Fuller Company Tape dispenser
US5029768A (en) * 1988-09-07 1991-07-09 H.B. Fuller Company Tape dispenser
CN109578471A (zh) * 2018-12-04 2019-04-05 中南大学 一种接触式抱紧制动装置及组合制动器

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI75542C (sv) * 1986-02-27 1989-09-11 Ahlstroem Valmet Anordning för förflyttning av tambourvals till en pappers- eller karto ngmaskins rullmaskin
FI76766C (sv) * 1986-02-27 1990-04-24 Ahlstroem Valmet Anordning för uppbromsning av en pappers- eller kartongmaskins maskinr ulle
WO2024129422A1 (en) * 2022-12-12 2024-06-20 Ranpak Corp. Brake system and method for a dunnage conversion machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1325551A (en) * 1919-12-23 And john a
US2256154A (en) * 1938-10-15 1941-09-16 Mckiernan Terry Corp Winch
US2925153A (en) * 1953-11-27 1960-02-16 Cutler Hammer Inc Electromagnetic brake

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS448200Y1 (sv) * 1966-11-14 1969-03-29

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1325551A (en) * 1919-12-23 And john a
US2256154A (en) * 1938-10-15 1941-09-16 Mckiernan Terry Corp Winch
US2925153A (en) * 1953-11-27 1960-02-16 Cutler Hammer Inc Electromagnetic brake

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4507535A (en) * 1975-12-12 1985-03-26 American Brands, Inc. Method and apparatus for perforating material
US4302654A (en) * 1979-06-11 1981-11-24 Bennett William T Microperforation of cigarette tipping paper by use of laser beam
US4917327A (en) * 1988-09-07 1990-04-17 H. B. Fuller Company Tape dispenser
US5029768A (en) * 1988-09-07 1991-07-09 H.B. Fuller Company Tape dispenser
US4906334A (en) * 1989-03-27 1990-03-06 Lake Superior Paper Industries Broke pulping apparatus and reel stand with brake
CN109578471A (zh) * 2018-12-04 2019-04-05 中南大学 一种接触式抱紧制动装置及组合制动器

Also Published As

Publication number Publication date
JPS5089604A (sv) 1975-07-18
DE2427466A1 (de) 1975-06-19
GB1467409A (en) 1977-03-16
CA1013277A (en) 1977-07-05
DE2427466B2 (de) 1980-04-10
SE7406618L (sv) 1975-06-13
SE407051B (sv) 1979-03-12

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