US3752058A - Feed mechanism - Google Patents

Feed mechanism Download PDF

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Publication number
US3752058A
US3752058A US00152266A US3752058DA US3752058A US 3752058 A US3752058 A US 3752058A US 00152266 A US00152266 A US 00152266A US 3752058D A US3752058D A US 3752058DA US 3752058 A US3752058 A US 3752058A
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United States
Prior art keywords
wheel
strap
moving
rollers
fixed pivot
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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.)
Expired - Lifetime
Application number
US00152266A
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English (en)
Inventor
P Lems
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Signode Corp
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Signode Corp
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Publication date
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Publication of US3752058A publication Critical patent/US3752058A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B13/00—Bundling articles
    • B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
    • B65B13/22—Means for controlling tension of binding means

Definitions

  • ABSTRACT [21 Appl. No.: 152,266 A strapfeeding and tensioning mechanism for applying strap material about an article and tensioning the strap 52] U 8 Cl 100 /32 100/26 prior to interconnection of the strap loop about the ar- [51] g 13/22 ticle.
  • the tensioning mechanism consists of a driven 58] Fieid /25 26 32 wheel that has a friction producing member cooperat- 226/1 83 ing therewith to produce frictional engagement between the strap and the peripheral surface of the wheel.
  • the friction producing member is in the form of an arcuate segment that encompasses a substantial circurn- UNITED STATES PATENTS ferential portion of the wheel and is movable between 9 2 V196l 1! e! 100/26 first and second positions to 1) allow unrestricted rela- 23764505 V1957 226/133 Ux tive movement between the strap and the wheel and gags 5 (2) frictionally engage the strap with the periphery of the wheel to cause movement of the strap in response to rotation of the wheel.
  • the present invention relates generally to a mechanism for feeding strap about an article to produce a loop and tensioning the strap about the article after the leading end of the strap has been gripped.
  • the present invention has particular utility in the feeding and tensioning of various types of plastic strapping materials.
  • both patents being assigned to the as'signee of the present invention.
  • the feeding and initial removal of slack from the strap loop is accomplished by a first wheel that is driven at a high rate of speed in opposite directions, while the final tensioning wheel has a fixed guide spaced therefrom for guiding the strap adjacent the wheel.
  • the drive mechanism incorporates a clutch that automatically slips when a predetermined amount of tension has been developed in the strap.
  • the final tensioning of the strap loop is then accomplished by a second wheel that has the strap encompassing a portion thereof.
  • the final tensioning wheel has a urethane rubber-like material on the outer periphery thereof, and the tension produced by the initial feed wheel draws the strap away from the guide into engagement with the tension wheel and produces frictional driving engagement between the urethane portion and the strap to produce the final tensioning of the strap loop.
  • the present invention contemplates an improved guiding and friction gripping mechanism that cooperates with the final tensioning wheel of a strap feeding and tensioning apparatus that insures positive gripping between the wheel and the strap during the tensioning operation and at the same time provides for a movable guide that cooperates with the strap during the rapid feeding phase of the operation to minimize abrasion between the guide and the strap.
  • the mechanism consists of a member that has a concave surface in juxtaposed relation to at least a peripheral portion of the wheel and moving means cooperating with the member to move the member between a guiding position and a gripping position.
  • the concave or arcuate surface is collectively defined by a plurality of circumferentially spaced freely rotatable rollers that are interconnected by links and the moving means consists of a fixed pivot axis for one end of the member, and an arm pivoted on a second pivot axis with the opposite end of the member secured to the arm eccentrically of the fixed pivot.
  • the arm is then moved between two po sitioris to respectively define the guiding and the friction gripping positions for the arcuate surface.
  • the roll- 'ers are sufficiently close to one another that their diametric portions adjacent the tension wheel cooperate to define an arcuate strap compressing surface, even though the rollers are spaced.
  • FIG. 1 is a schematic front elevational view of a strapping machine and associated strap guide chute
  • FIG. 2 is an enlarged fragmentary side elevational view illustrating the feeding and tensioning mechanism of the strapping machine
  • FIG. 3 is a view taken generally along line 3-of FIG.
  • FIG. 4 is a section viewtaken generally along line 4-4 of FIG. 3;
  • FIG. 5 is an enlarged fragmentary view taken generally along line 55 of FIG. 4.
  • a strap 10 extends from a supply roll 12 through a suitable guide chute 14 to be located around a package or the like 16 in the form of a strap loop.
  • the strap is directed through a feeding and tensioning mechanism 18 which forms the subject matter of the present invention.
  • a suitable sealing mechanism 19 is actuated to secure the over-lapped strap portions in place about the container.
  • the feed wheel 22 of the feeding and tensioning mechanism is operated at a high rate of speed while the tensioning wheel 24 is operated at a lower rate to allow for the development of higher torque forces for the final tensioning of the strap.
  • the strap is frictionally gripped between the feed wheel 22 and a pair of circumferentially spaced pinch rollers 28 that are biased or otherwise held in engagement with the strap to frictionally grip the strap between the wheel and the pinch rolls.
  • the pinch rolls may either be continuously held in engagement with the strap, as is disclosed in U.S. Pat. No. 3,420,158 or alternatively may be movable relative to the feed wheel as is disclosed in U.S. Pat. No.
  • the wheel 22 is initially rotated in a clockwise direction to feed strap from the supply 12 in sufficient quantity to encompass the article and create a loose loop.
  • the strap is guided along a fixed guide adjacent the periphery of the second wheel 24 in a manner to prevent direct contact with the second wheel.
  • the leading end of the strap is gripped, as by structure described in detail in U.S. Pat. No. 3,442,203.
  • the wheel 22 is rotated in the opposite direction, counterclockwise as viewed in FIG. 2, to initially take-up slack in the strap loop prior to final tensioning of the strap loop.
  • the strap is pulled into engagement with the periphery of the second wheel 24 and, when the tension on the strap reaches a predetermined level, a slip clutch (not shown in this application)-between the drive motor and feed wheel 22 causes a slipping, which allows the feed wheel to be rotated at a slower rate of speed.
  • a slip clutch (not shown in this application)-between the drive motor and feed wheel 22 causes a slipping, which allows the feed wheel to be rotated at a slower rate of speed.
  • the present invention contemplates a heavy duty type of apparatus that is capable of developing a desired tension on the strap loop.
  • the gripping force between the encompassing portion of the strap 10 and the wheel 24 is substantially increased by gripping means constructed in accordance with the teachings of the present invention.
  • the gripping means is in the form of an elongated member defining a concave or arcuate surface in juxtaposed relation to the encompassing portion of the strap, with the arcuate surface having a first position for guiding the strap in spaced relation to the periphery of the wheel and a second position for forcing the strap into engagement with the periphery of the wheel.
  • the means for selectively causing gripping engagement between the tension wheel and the strap is illustrated in FIGS. 2 through 5 and consists of a member or belt 30 having one end pivoted about a fixed pivot pin 32 that is secured to the housing 34 (FIG. 2). The opposite end of the belt is secured to the hub portion 36 of an arm 38 that is pivoted on a second fixed pivot pin 40 carried by the support 34.
  • the belt 30 consists of a plurality of rollers 42a and 42b freely rotatable on pins 46 that are interconnected by links 44.
  • the arm 38 is normally maintained in the solid position shown in FIG. 2 wherein the arcuate surface defined by the collective peripheries of the plurality of rollers 42a and 42b is spaced a sufficient distance from the periphery of the wheel 24 to allow the strap 10 to move freely along the arcuate surface without engaging the peripheral surface of the wheel.
  • the arm 38 is moved to the second dotted line position, shown in FIG. 2, by means to be hereinafter described, to cause the arcuate surface to be moved sufficiently to produce a gripping pressure between the periphery of the wheel and the adjacent surface of the strap.
  • the periphery of the wheel be serrated or have teeth formed thereon and to form the wheel of a steel material.
  • the gripping means further includes mechanism for maintaining a predetermined minimum spacing between the peripheral surface of the wheel and the arcuate or concave surface collectively defined by the rollers 42a and 42b. This is desirable to insure that the rollers do not directly engage the roughened surface of the wheel when no strap is located between the two surfaces. It will be appreciated that direct contact could damage either or both of the surfaces.
  • the mechanism for maintaining the predetermined minimum spacing between the two surfaces is in the form of radial flanges 50 located on opposite ends of the rollers 42b, which may be termed spools.
  • flanges 50 extend beyond the outer periphery of the wheel 24 toward the center and engage a pair of circumferentially extending ledges 52 located on opposite sides of the peripheral surface of the wheel.
  • the ledges are formed by reduced diameter portions adjacent the opposite ends of the wheel.
  • the mechanism for moving the member or belt 30 into frictional engagement with the strap to produce a substantially uniform gripping pressure between the encompassing portion of the strap and the periphery of the tension wheel 24 may take various forms.
  • a power means including a solenoid 58 having its plunger 60 connected to the outer end of the arm 38 through a link 62.
  • the solenoid may periodically be energized by any suitable means, such as a timer that may periodically be actuated for a predetermined amount of time to move the arm from the solid line to the dotted line position of FIG. 2 and maintain the arm in the dotted line position for the selected time period.
  • the solenoid could be energized by a suitable govenor or cam that could be controlled by the speed of rotation of the feed wheel 22.
  • a slip clutch in the drive mechanism for the feed wheel 22 allows the drive mechanism to continue to move at a rapid rate while the feed wheel 22 is rotated at a slower rate.
  • the solenoid 58 could be actuated to move the arm 38.
  • the lead end of the strap is initially fed between the peripheral surface of the wheel 22 and the pinch rollers 28 as well as between the arcuate surface on the member 30 and the peripheral surface of the second wheel 24.
  • the lead end of the strap is then located in a suitable guide mechanism (not shown) to be fed into the guide 14 extending around the container 16. Clockwise rotational movement of the first wheel 22 by drive motor rapidly feeds the strap in sufficient quantity around the container to form a strap loop.
  • the free end is gripped and the drive motor is reversed so that the first wheel 22 is rotated counterclockwise while the second wheel is rotated clockwise.
  • the first wheel 22 will remove all of the slack from the strap loop and, when sufficient tension has been achieved on the strap loop, a slip clutch will become operative with a resultant reduction in speed of the first wheel 22 until such time as the speed of the two wheels coincide.
  • the solenoid 58 may be energized to move the arm 38 to its dotted line position and consequently move the member 30 to its gripping position, forcing the encompassing portion of the strap into frictional engagement with approximately one-half or 180 of the periphery of the second wheel 24 producing a substantially uniform pressure of the entire encompassing portion of the strap.
  • the overlapping portions of the strap are interconnected by any suitable means, and the loop is severed from the remainder of the strap supply 12.
  • the strap and gripping member 30 encompass at least a 90 segment of the wheel to insure sufficient gripping force and achieve the desired tension on the strap loop.
  • the present invention provides a simple and inexpensive expedient for positively gripping the strap during a tensioning phase of article packaging while readily allowing unobstructed relative movement between the tension wheel and the strap during the remaining phases of the article packaging.
  • the rollers provide a movable guide for the strap during the feeding operation while also providing a movable gripping member during the tensioning phase of the operation.
  • the mechanism 30 could also be used in place of the pinch rolls 28.
  • Apparatus for moving strap to be directed about an article comprising a wheel having at least a portion thereof encompassed by said strap, said wheel having.
  • a serrated periphery to increase the frictional engagement between said strap and said wheel; a drive mecha-- nism for rotating said wheel; and means, extending substantially 180 around said wheel, for selectively causing gripping engagement between said wheel and strap, said means including a member having a concave surface in juxtaposed relationship with the encompassing portion of said strap, said concave surface being comprised of a plurality of equally and closely spaced freely rotatable rollers, and moving means cooperating with said memberto move said rollers into engagement with said strap and said strap into engagement with the serrated periphery of said wheel to produce a gripping pressure between the encompassing portion of said strap and the serrated periphery of said wheel.
  • said moving means includes means defining a fixed pivot ad- 5 jacent said wheel for one end of said member;
  • said power means includes means defining a second fixed pivot adjacent said wheel, an arm rotatable on said second fixed pivot between firat and second positions, said opposite end of said member being connected to said arm at a location spaced from the second fixed pivot; and means for moving said arm between said positions.
  • Apparatus for moving strap to be directed about an article comprising a wheel having at least a portion thereof encompassed by said strap; a drive mechanism for rotating said wheel; and means for selectively causing gripping engagement between said wheel and strap, the improvement of said means including a member having a concave surface in juxtaposed relationship with the encompassing portion of of said strap and moving means cooperating with said member to engage said strap with said surface to produce a gripping pressure between the encompassing portion of said strap and the periphery of said wheel, said moving means including means defining a fixed pivot adjacent said wheel for one end of said member, power means connected to an opposite end of said member, said power means including mpans defining a second fixed pivot adjacent said wheel, an arm rotatable on said second fixed pivot between first and second positions, said opposite end of said member being connected to said arm at a location spaced from the second fixed pivot, and means for moving said arm between said positions.
  • Apparatus for moving strap to be directed about an article comprising a wheel having at least a portion thereof encompassed by said strap; a drive mechanism for rotating said wheel; and means for selectively causing gripping engagement between said wheel and strap, the improvement of said means including a member having a concave surface in juxtaposed relationship with the encompassing portion of said strap, moving means cooperating with said member to engage said strap with said surface to produce a gripping pressure between the encompassing portion of said strap and the periphery of said wheel, and spacer means, between said wheel and concave surface to maintain a predetermined spacing between the periphery of said wheel and said surface when no strap is encompassing said wheel.
  • a strap feed and tension mechanism for strapping to be directed about an article and securing the same including a wheel about which a strap is disposed; means for driving said wheel; cooperating means adjacent the peripheral surface of said wheel, said cooper-' ating means defining an arcuate surface encompassing a substantial portion of said wheel and producing a substantially uniform gripping pressure between said strap and said portion of said wheel; and means for moving said arcuate surface away from the position adjacent 11.
  • a strap feeding and tensioning mechanism as defined in claim 9, in which said wheel has ledges adjacent opposite ends of said surface and at least some of said rollers have flanges extending beyond the peripheral surfaces engaging said ledges to define a minimum spacing between the peripheral surface of said wheel and said rollers.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
US00152266A 1971-06-11 1971-06-11 Feed mechanism Expired - Lifetime US3752058A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15226671A 1971-06-11 1971-06-11

Publications (1)

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US3752058A true US3752058A (en) 1973-08-14

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Application Number Title Priority Date Filing Date
US00152266A Expired - Lifetime US3752058A (en) 1971-06-11 1971-06-11 Feed mechanism

Country Status (8)

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US (1) US3752058A (ja)
JP (1) JPS5435557B1 (ja)
CA (1) CA987581A (ja)
ES (1) ES402784A1 (ja)
FR (1) FR2141357A5 (ja)
GB (1) GB1357480A (ja)
IT (1) IT955759B (ja)
ZA (1) ZA723519B (ja)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3847071A (en) * 1971-11-15 1974-11-12 Fmc Corp Strapping machine feed
US4161910A (en) * 1978-05-19 1979-07-24 Signode Corporation Strap feeding and tensioning assembly
US4218969A (en) * 1979-02-01 1980-08-26 Nichiro Kogyo Company, Limited Band feeding and tightening apparatus for strapping machine
US4910945A (en) * 1987-04-17 1990-03-27 Strapack Corporation Band feeding and tightening apparatus for strapping machine
DE3933756A1 (de) * 1989-10-10 1991-04-18 Schwede Horst Rueckspann-vorrichtung fuer ein verpackungs-band
US5179892A (en) * 1991-03-18 1993-01-19 General Motors Corporation Strap feed assembly with floating back-up wheels
US5516022A (en) * 1994-02-28 1996-05-14 Illinois Tool Works, Inc. Method and apparatus for a two speed strap take up
US6041581A (en) * 1997-07-28 2000-03-28 Orgapack Gmbh Band moving device of a strapping device
JP2001162075A (ja) * 1999-12-02 2001-06-19 Duerkopp Adler Ag 所定の縫い目線に沿って縫い目を形成する縫製装置
US6640700B2 (en) * 1999-12-02 2003-11-04 Enterprises International, Inc. Apparatus for applying flexible straps around bundles of objects

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3118711A1 (de) * 1981-05-12 1982-12-02 Cyklop International Emil Hoffmann KG, 5000 Köln Vorrichtung zum spannen eines umreifungsbandes
CA1320427C (en) * 1987-06-18 1993-07-20 Yasunori Sakaki Method and apparatus for feeding and tightening a band in strapping machine
GB2481724B (en) * 2011-07-13 2012-10-03 Chien-Fa Lai Feeding and reversing mechanism for a strapping machine

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3847071A (en) * 1971-11-15 1974-11-12 Fmc Corp Strapping machine feed
US4161910A (en) * 1978-05-19 1979-07-24 Signode Corporation Strap feeding and tensioning assembly
US4218969A (en) * 1979-02-01 1980-08-26 Nichiro Kogyo Company, Limited Band feeding and tightening apparatus for strapping machine
US4910945A (en) * 1987-04-17 1990-03-27 Strapack Corporation Band feeding and tightening apparatus for strapping machine
DE3933756A1 (de) * 1989-10-10 1991-04-18 Schwede Horst Rueckspann-vorrichtung fuer ein verpackungs-band
US5078058A (en) * 1989-10-10 1992-01-07 Horst Schwede Tensioning device for a packaging tape
US5179892A (en) * 1991-03-18 1993-01-19 General Motors Corporation Strap feed assembly with floating back-up wheels
US5516022A (en) * 1994-02-28 1996-05-14 Illinois Tool Works, Inc. Method and apparatus for a two speed strap take up
US6041581A (en) * 1997-07-28 2000-03-28 Orgapack Gmbh Band moving device of a strapping device
JP2001162075A (ja) * 1999-12-02 2001-06-19 Duerkopp Adler Ag 所定の縫い目線に沿って縫い目を形成する縫製装置
US6640700B2 (en) * 1999-12-02 2003-11-04 Enterprises International, Inc. Apparatus for applying flexible straps around bundles of objects
US6782679B2 (en) * 1999-12-02 2004-08-31 Enterprises International, Inc. Control mechanism for a feed and tension unit in a strapping apparatus
JP4520019B2 (ja) * 1999-12-02 2010-08-04 デユルコップ・アドレル・アクチエンゲゼルシヤフト 所定の縫い目線に沿って縫い目を形成する縫製装置

Also Published As

Publication number Publication date
GB1357480A (en) 1974-06-19
DE2224673A1 (de) 1973-01-04
DE2224673B2 (de) 1975-09-25
JPS5435557B1 (ja) 1979-11-02
CA987581A (en) 1976-04-20
FR2141357A5 (ja) 1973-01-19
IT955759B (it) 1973-09-29
ZA723519B (en) 1973-03-28
ES402784A1 (es) 1975-04-01

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