US3655108A - Strand unreeling device with automatic tension control - Google Patents

Strand unreeling device with automatic tension control Download PDF

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Publication number
US3655108A
US3655108A US876912A US3655108DA US3655108A US 3655108 A US3655108 A US 3655108A US 876912 A US876912 A US 876912A US 3655108D A US3655108D A US 3655108DA US 3655108 A US3655108 A US 3655108A
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US
United States
Prior art keywords
force
unreeling
bobbin
strand
arm assembly
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Expired - Lifetime
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US876912A
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English (en)
Inventor
Joannes Francis Marc Bonnabaud
Claude Brat
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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
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/02—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package
    • B65H59/06—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package by devices acting on material leaving the package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/36—Floating elements compensating for irregularities in supply or take-up of material
    • 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
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • Greigg 57 I ABSTRACT In a device for unreeling a uniformly and automatically tensioned strand from a non-rotatably held bobbin, there are provided an unreeling arm caused to orbit about said bobbin by the force exerted by a strand pulling apparatus, a braking mechanism to dampen the rotation of said unreeling arm and a brake control or balancing mechanism to which there are applied a predetermined braking force and the force exerted by said strand pulling apparatus. The result of these two counteracting forces controls the braking effect on said unreeling arm.
  • This invention relates to a device by means of which a strand, such as a thread, filament or the like is maintained under automatically regulated tension as it is unreeled from a bobbin with the application of a remote, continuous pulling force.
  • the strand running from a rotating bobbin, passes over a wheel provided with a braking device and is then trained I about a pulley so that two horizontal strand flights are obtained.
  • the pulley is subjected to a constant horizontal force opposed to that exerted on the pulley by the two strand flights and is adapted to shift horizontally as the tension on the two strand flights varies. Said shift modifies the braking force exerted on the wheel and thus adjusts the tension to a value required to balance the said constant horizontal force.
  • the strand is not subjected to a uniform tension along its entire length.
  • the strand portion extending from the bobbin to the braking wheel has a tension which is notably lower than that of the horizontal strand flight extending from the wheel to the pulley. This difference of tension is necessary to impart on the wheel a torque which is at least equal to the braking torque.
  • the strand portion upstream of the wheel is liable to buckle and, in case the bobbin is disposed vertically, the strand layers thereon are likely to slip.
  • the bobbin itself since the bobbin itself is not braked, it has the tendency of unreeling by inertia. Thus, in case of a sudden drop of tension caused, for example, by an abrupt stoppage of the pulling mechanism, loops and twists may be formed in the strand.
  • the unreeling device comprises an unreeling arm orbiting about a stationary bobbin and engaging the strand extending therefrom.
  • the rotary motion of the arm which is caused by a strand pulling apparatus externally of the unreeling device, is dampened by a braking mechanism.
  • the strand extending from said arm is trained about a pulley which is displaceable parallel to its own axis.
  • the pulling force exerted by said strand pulling apparatus is counteracted by a weight exerting a force on said displaceable pulley.
  • the variation of said pulling force causes a displacement of said pulley and the braking force exerted by said braking mechanism on said unreeling arm is varied by means responsive to the displacement of said pulley.
  • FIG. 1 is a schematic side elevational view, partially in section, of a preferred embodiment of the invention
  • FIG. 2 is a detailed sectional view taken along line II-Il of FIG. 1;
  • FIG. 3 is a schematic isometric view of a modification of one part of the preferred embodiment and FIG. 4 is a schematic side elevational view, partially in section of a modification of the embodiment shown in FIG. 1.
  • FIG. 1 there is shown a bobbin 1 secured, by means of a bolt 2, in an axially vertical position to a support S forming part of a frame B.
  • the unreeling arm 5 is formed of an upper portion S extending downward from joumalling member 4 in an inclined manner, a vertical mid-portion M spaced from bobbin 1 and a horizontal lower portion I terminating at the cylindrical neck portion 3 of support S.
  • the joumalling member 4 On the joumalling member 4 there is mounted a roller 6 in such a manner that its groove base is substantially tangent to the axis of rotation of assembly 4, 5.
  • the unreeling arm 5 carries a roller 7 which guides the strand (generally indicated at F) from bobbin 1 to roller 6 clear of either the bobbin 1 or the arm 5.
  • the joumalling member 4 is provided with an axial bore T through which the strand F passes and extends upwardly.
  • pulley 8 On frame B there is mounted a pulley 8, the groove base of which is substantially tangent to the axis of the unreeling assembly 4, 5.
  • the pulley 8 guides the strand, as indicated at 12, towards another pulley 9 mounted on a mobile carriage 10 suspended from a horizontal bar 14.
  • the strand is trained about pulley 9 through an angle of approximately and is directed thereafter, as indicated at 13, horizontally towards a pulley 11, the rotational plane of which is variable. From pulley 11 the strand proceeds to a pulling apparatus, now shown.
  • the braking force exerted by the brake shoe 19 on the disc D dampens the rotation of the unreeling assembly 4,5 and depends on the downward directed force of the bar 16 at the location of engagement with brake shoe 19.
  • the last-named force is determined by the position of weighted slide 15 on bar 16. The farther away the slide 15 is from pivot pin 17, the greater the clockwise torque thereabout and the greater the downward force on bar 16.
  • the unreeling arm 5 may be complemented by an elongated rotary roll 33 (FIG. 3) disposed parallel to the bobbin 1 and mounted on a lateral, arm-like extension 34 integral with unreeling arm 5.
  • the strand prior to be engaged by the roller 7, is trained about the roll 33.
  • a complemental loading device for heavy bobbins may be attached, if necessary.
  • a device for unreeling a strand under predetermined tension from a bobbin comprising:
  • an unreeling arm assembly rotatable substantially axially about said bobbin and including means orbiting about said bobbin and engaging said strand and unreeling the same from said bobbin, said unreeling arm assembly rotatable by a pulling force exerted on said strand,
  • a controllable braking mechanism associated with said unreeling arm assembly to dampen the latter in its rotation
  • D. a balancing mechanism exposed to a first and a second force, said first force formed of a predetermined constant force, said second force opposing said first force and constituted by said pulling force, said balancing mechanism including 1. a pulley about which the running strand is trained downstream of said unreeling arm assembly,
  • a force generating means operatively connected to said carriage means and to said braking mechanism for exerting a force to the latter as a function of the position of said carriage means, said force generating means including a. a bar pivotable in a substantially vertical plane about a pin and connected to said braking mechanism and b. a sliding member suspended from said bar and displaceable thereon in unison with said carriage means, said sliding member exerts a torque on said bar about said pin, said bar exerts a force on said braking mechanism in response to said torque.
  • a device as defined in claim 1 including a cam track disposed in the path of travel of said sliding member, said sliding member engages said cam track when said second force has fallen substantially below said first force, said cam track, when in engagement with said sliding member, exerts a force thereon that aids said torque.

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  • Tension Adjustment In Filamentary Materials (AREA)
US876912A 1968-11-14 1969-11-14 Strand unreeling device with automatic tension control Expired - Lifetime US3655108A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR173652 1968-11-14

Publications (1)

Publication Number Publication Date
US3655108A true US3655108A (en) 1972-04-11

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Application Number Title Priority Date Filing Date
US876912A Expired - Lifetime US3655108A (en) 1968-11-14 1969-11-14 Strand unreeling device with automatic tension control

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US (1) US3655108A (fr)
DE (1) DE1957407A1 (fr)
FR (1) FR1591528A (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3879978A (en) * 1974-01-07 1975-04-29 Reynolds Metals Co Wire unreeling system
USRE28917E (en) * 1974-01-07 1976-07-27 Reynolds Metals Company Wire unreeling system
US4659033A (en) * 1983-06-14 1987-04-21 Preload Concrete Structures, Inc. Apparatus for prestressing concrete structures or the like
US5120024A (en) * 1990-05-29 1992-06-09 The United States Of America As Represented By The Secretary Of The Navy Payout tension control system for reel mounted cable
EP1270484A2 (fr) * 2001-05-22 2003-01-02 R.C.E. S.r.l. Dérouleur de fil métallique de bobines à forte inertie
US20040188559A1 (en) * 2001-05-17 2004-09-30 Fahredin Rexhaj Device and method for reeling-off wire from a wire coil
DE102004022244A1 (de) * 2004-05-04 2005-12-01 Telegärtner Gerätebau GmbH Vorrichtung zum Zuführen von aufgewickeltem flexiblem strangartigem Gut zu einer Verarbeitungseinrichtung
EP2757063A1 (fr) * 2011-09-16 2014-07-23 Murata Machinery, Ltd. Dispositif de déroulement de bobine de dispositif d'enroulement filamentaire
CN108746434A (zh) * 2018-06-29 2018-11-06 南通海诚辐条有限公司 一种盘状辐条原料放线装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1873422A (en) * 1930-10-16 1932-08-23 Delco Remy Corp Wire unreeling and tensioning device
GB1017904A (en) * 1962-11-16 1966-01-26 Btr Industries Ltd An improved wire let-off device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1873422A (en) * 1930-10-16 1932-08-23 Delco Remy Corp Wire unreeling and tensioning device
GB1017904A (en) * 1962-11-16 1966-01-26 Btr Industries Ltd An improved wire let-off device

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3879978A (en) * 1974-01-07 1975-04-29 Reynolds Metals Co Wire unreeling system
USRE28917E (en) * 1974-01-07 1976-07-27 Reynolds Metals Company Wire unreeling system
US4659033A (en) * 1983-06-14 1987-04-21 Preload Concrete Structures, Inc. Apparatus for prestressing concrete structures or the like
US5120024A (en) * 1990-05-29 1992-06-09 The United States Of America As Represented By The Secretary Of The Navy Payout tension control system for reel mounted cable
US20040188559A1 (en) * 2001-05-17 2004-09-30 Fahredin Rexhaj Device and method for reeling-off wire from a wire coil
US7147176B2 (en) * 2001-05-17 2006-12-12 Metso Paper, Inc. Device and method for unreeling wire from a wire coil
EP1270484A3 (fr) * 2001-05-22 2003-07-23 R.C.E. S.r.l. Dérouleur de fil métallique de bobines à forte inertie
EP1270484A2 (fr) * 2001-05-22 2003-01-02 R.C.E. S.r.l. Dérouleur de fil métallique de bobines à forte inertie
DE102004022244A1 (de) * 2004-05-04 2005-12-01 Telegärtner Gerätebau GmbH Vorrichtung zum Zuführen von aufgewickeltem flexiblem strangartigem Gut zu einer Verarbeitungseinrichtung
EP2757063A1 (fr) * 2011-09-16 2014-07-23 Murata Machinery, Ltd. Dispositif de déroulement de bobine de dispositif d'enroulement filamentaire
EP2757063A4 (fr) * 2011-09-16 2015-04-15 Murata Machinery Ltd Dispositif de déroulement de bobine de dispositif d'enroulement filamentaire
CN108746434A (zh) * 2018-06-29 2018-11-06 南通海诚辐条有限公司 一种盘状辐条原料放线装置
CN108746434B (zh) * 2018-06-29 2023-11-21 南通海诚辐条有限公司 一种盘状辐条原料放线装置

Also Published As

Publication number Publication date
DE1957407A1 (de) 1970-06-04
FR1591528A (fr) 1970-04-27

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