US2621893A - Tensioning tool - Google Patents

Tensioning tool Download PDF

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Publication number
US2621893A
US2621893A US66779A US6677948A US2621893A US 2621893 A US2621893 A US 2621893A US 66779 A US66779 A US 66779A US 6677948 A US6677948 A US 6677948A US 2621893 A US2621893 A US 2621893A
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US
United States
Prior art keywords
strap
tool
tensioning
loop
feed wheel
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.)
Expired - Lifetime
Application number
US66779A
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English (en)
Inventor
William C Childress
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
Original Assignee
Signode Steel Strapping Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Signode Steel Strapping Co filed Critical Signode Steel Strapping Co
Priority to US66779A priority Critical patent/US2621893A/en
Priority to GB31450/49A priority patent/GB662624A/en
Priority to FR1002754D priority patent/FR1002754A/fr
Priority to DES20043A priority patent/DE885376C/de
Application granted granted Critical
Publication of US2621893A publication Critical patent/US2621893A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65B13/02—Applying and securing binding material around articles or groups of articles, e.g. using strings, wires, strips, bands or tapes
    • B65B13/025—Hand-held tools

Definitions

  • My invention relates to tensioning tools.
  • More particularly it relates to a tool for tightening and putting under tension loops of metallic strapping with which packages are encircled and bound to secure and reinforce them.
  • the principal object of my invention is to provide a package binder-strap tensioning tool which is more convenient to apply, operate and remove, and of greater range than prior tools.
  • Another object is to provide a tool of the so called feed wheel type with which desirably high tensions may be obtained without the strap weakening and mutilation heretofore experienced with tools of this variety.
  • Another object is to provide a feed Wheel type tensioning tool of high efficiency in the translation of operator effort into strap tension.
  • a further object is to provide a tool in which the tensioning operation tends to keep the overlapping ends of the package looping strap in proper alignment for the easy production of effective joints therebetween.
  • Another object is to provide a tool which is simple, rugged, of light weight for the tensions obtainable, and reliable.
  • Fig. *1 is an elevation of what may properly be termed the face of the tool, since it is the side of application to the binder;
  • Fig. 2 is an elevation of the opposite or rear face with some of the normally concealed mechanism shown in dotted lines;
  • Fig. 3 is a forward end elevation
  • Fig. 4 is a section on the line l4 of Fig. 3;
  • Fig. 5 is a section on the line 5-5 of Fig. 3.
  • the tool comprises a main frame A which rests upon the package being bound, and a tension mechanism frame B which is pivoted to the main frame and carries all of the moving tension mechanism including the operato: actuated tensioning handle C.
  • the main frame A is, for the sake of rigidity, simplicity and lightness, made as a single onepiece casting. It includes a front foot Iii, which is substantially L-shaped in plan, and a rear foot 5!. The two feet are joined by a web I2 and a finger grip E3. The space or gap between web 52 and finger grip i3 is to accommodate the fingers of the hand of the operator when the tool is being carried or, as will be later explained, when the tool is being applied to or removed from the work.
  • Front foot I0 is provided with a serrated strap anchor M, which, for easy adjustment, may be in the form of a screw threading through a tapped hole in the foot.
  • a flange l 5 projects upwardly or outwardly from the back of the foot Ill and to attain additional strength and rigidity joins and, in effect, merges into web l2 and finger grip I3 as most clearly shown in Figs. 1, 2 and 4.
  • the upper end of flange I5 is enlarged into a partially cylindrical boss l6, and the rigidity of flange I 5 with respect to the main frame as a whole is increased by a curved rib IL
  • the tension mechanism frame B is in part in. the form of a hood 25 provided with a pair of parallel wings or ears 2% (probably most clearly indicated in Fig.
  • a bushing 29 may be inserted in the pivot bore of boss l5 and anchored therein by a set screw 30, as best shown in Figs. 1 and 3.
  • Hood 25 carries a rotatable shaft which at the forward end is journaled in roller bearings 36, the cage of which is clamped rigidly in place. by a clamping screw 31. Intermediate its ends, shaft 35 is also journaled for rotation in the rear wall 38 of hood 25. Within hood 25, shaft 35 carries for rotation therewith a strap-feed wheel 39 and outside the hood shaft 35 carries, also for rotation therewith, a ratchet wheel 40. Insursince that both the feed and ratchet wheels will rotate with shaft 35 may be had by making the shaft noncylindrical (e. g., square or hexagonal as shown in Figs. 4 and 5) where it fits those wheels, and shaping the holes through the wheels to conform.
  • the shaft noncylindrical e. g., square or hexagonal as shown in Figs. 4 and 5
  • Shaft 35 also has rotatably mounted thereon the tensioning handle 0.
  • the forward end of handle 0 is bifurcated to form the two flat parallel handle-bearing blades and 46 which are spaced apart to lie on opposite sides of the ratchet wheel 40, blade 45 between the ratchet wheel and rear wall 38 of hood 25, blade 35 against the outer face of the ratchet wheel, all as shown most clearly in Fig. 3.
  • An end plate 41 which stands upright at the outer end of a horizontal extension 543 of hood 25; provides a rear, and third, bearing for shaft 35 and 3 serves also as a retainer to maintain the tensioning handle and ratchet wheel in place on that shaft.
  • An actuating pawl 58 lies in the space between blades 45 and 46 of the tensioning handle and is pivotally attached to the handle by a pivot pin 5
  • Actuating pawl 50 has a tooth 52 at its inner end for engaging the teeth of ratchet wheel 40 and an extension 53 on the other side of its pivot. This extension projects outwardly beyond the top surface of handle C, as shown most clearly in Figs. 1, 2, a and 5, so as to be readily pushed forwardly by the thumb of the operators hand when the fingers are about the finger grip l3 and the palm is against the top of the tensioning handle.
  • a coiled spring 54 biases pawl 59 to cause its tooth to engage the teeth of ratchet wheel to but that normal engagement may be broken by pushing forward on pawl extension 53.
  • Ratchet wheel 40 is retained by a pair of holding pawls 55 and 56 against rotation reversely to that imparted to it by actuating pawl 55.
  • Pawls 55 and 55 are journaled on a shaft 5! which extends between inner wall 38 and end plate 41 of hood 25 and each is biased by a coiled spring 58 toward engagement with ratchet wheel 45.
  • Holding pawl 55 is longer than holding pawl 55 by half the pitch of the teeth of ratchet wheel 43, with the result that when the wheel is rotated in a clockwise direction, which is the direction for binder tensioning, shorter pawl 56 moves into holding position behind each tooth prior to the time longer pawl 55 moves into holding position behind the same tooth, the delay being the are equivalent to half the tooth pitch.
  • This arrangement makes for tighter binding because, upon retraction of the tensioning handle between tensioning strokes, the ratchet wheel and consequently the feed wheel can reverse no more than half the pitch of the ratchet wheel teeth.
  • Tensioning handle blade 45 is provided with a curved projection 55 and handle blade 45 is provided with a similar curved projection 55.
  • the circumferential face of feed wheel 39 is serrated to enable it better to grip and move the upper of the overlapping loop ends of the package encircling binder.
  • These serrations are in the form of short, closely set, straight teeth 6'! which, as most clearly shown in Fig. 3, lie parallel to each other and extend diagonally entirely across the circumferential face of the wheel.
  • the diagonal direction is such that, when the feed wheel is rotated in a clockwise or tensioning direction, the outer edge of the upper strap is first engaged by a tooth and by the outer end of that tooth. Thereafter, as rotation proceeds, each tooth engages the upper strap progressively in a direction both across and longitudinally of the strap.
  • the diagonal arrangement enables several teeth to be in contact with and acting upon the upper strap simultaneously. For example, as many as seven teeth of the feed wheel may be in simultaneous contact with the top surface of the upper strap loop end. Thus shorter, smaller teeth can be effectively used, and effort and scarring of the strap surface is lessened and a smooth rolling action of the feed wheel on the strap is produced.
  • the diagonal arrangement of the feed wheel teeth exerts not only the longitudinally forward tensioning movement to the upper strap but also a lateraly inward thrust which tends to keep the loop ends back into the tool against a pair of forward gage pins 'I0'H which may be adjustably set in holes in the main frame.
  • a similar gage pin 12 may be set in a hole in the main frame just above the rear foot ll. Proper placement of the tool relative to the overlapping strap loop ends may be aided by providing the forward end of the main frame with ledge 13 slightly overhanging the foot H] and the rear end of the main frame with a ledge '14 similarly overhanging the rear foot I l.
  • the tensioning handle is so curved that in normal position, as shown by the full lines of Figs. 1 and 2, it lies substantially parallel to the finger grip of the main frame with its under or inner edge resting on a curved camming surface 15 at the upper forward corner of the finger grip.
  • the lower side of the finger grip and the upper edge of the tensioning handle are separated a distance which enables the right hand of the operator to grasp and hold the tool with the fingers embracing the finger grip and the palm of the hand engaging the tensioning handle, and easily exert considerable squeezing pressure upon the tensioning handle to rock it upon camming surface 15 to a position such as indicated by the dotdash lines of Figs. 1 and 2.
  • This rocking movement rotates the entire tension mechansim frame and all of the tensioning mechanism carried thereby in a clockwise direction against the bias of spring 28 to move the feed wheel away from forward main frame l0 and, in effect, open the tool for the insertion therein of the overlapping ends of the package encircling loop to be ten sioned. Subsequent release of this squeezing pressure permits biasing spring 28 again to rotate the tension mechanism frame in a counterclockwise direction to move the feed wheel back toward foot In to clamp loop strap ends that may be interposed therebetween.
  • the operator encircles the package to be bound with a loop S of flexible steel binder strap taken from any suitable source, such as a reel.
  • a loop S of flexible steel binder strap taken from any suitable source, such as a reel.
  • the operator With the package looped by the strap the operator, with his left hand, holds the two ends S and S" in overlapping relation.
  • his right hand holding the tool and sufdcient squeezing pressure being exerted between fingers embracing finger grip l3 and palm engaging the top edge of tensioning handle C to rock the tension mechanism frame B clockwise (as viewed in Fig. 1) about its pivotal connection 21 with the main frame to raise the feed wheel and, in effect, open the tool, he applies the tool laterally to the binder loop.
  • the overlapping loop ends S and S are positioned between the feed wheel 39 and the clutch or anchor plug in foot l9 and pushed back into the tool against gage pins la-H.
  • the loop may be trained either over the top of or below rear foot H as binding conditions may seem to warrant.
  • each counterclockwise or forward stroke of tensioning handle C causes ratchet pawl 5%! to ride idly over the teeth of ratchet Wheel reverse rotation of the ratchet wheel being prevented by holding pawls 55 and 55.
  • actuating pawl 53 actively engages a tooth of ratchet wheel 4! and that wheel and also the feed wheel 39 are rotated in a clockwise direction, as viewed in Fig. 1.
  • the loop is made permanent by suitably joining its superposed ends in front of the tool.
  • the tool may now be removed.
  • the resuit is that the strap loop tension exerts a strong back pull on the feed wheel teeth which, if the feed wheel cannot rotate in reverse direction, not only increases the di nculty of disengaging the feed wheel teeth from the strap but, as disengagement is effected, causes the teeth to tear and mar the surface of the strap and weaken it.
  • This difiiculty is overcome by freeing the feed wheel forrreverse" rotation, as just described, because, when. so released, the tension in the binder loop turns the feed; wheel backward suf. ficiently to relieve its teeth of the tension in the loop and the feed wheel can be freed from the strap very easily and without hazard either to the strap or the teeth.
  • th strap in excess of that required for the tensioned' package loop and joint may be removed in any appropriate manner, as by cutting beyond the joint; or if the loop is taken from an indefinite length, such as a coil, it may be separated from th source in like manner.
  • the lower binder loop end can be effectively anchored by the clutch plug, and the upper binder loop end can be effectively slid thereover by the feed wheel with only a slight amount of pressure being applied by the biasing spring; but the relation between the axis of shaft 21, about which the hood 25 oscillates, and the axis of shaft 35 about which the feed wheel rotates (that is, the angle between a perpendicular through the axis of shaft 21 and a line drawn between the axis of shaft 21 and feed wheel shaft 35), is such that when the binder loop has been reduced about the package and further oscillation of tensioning handle C actually begins to impart tension to the bundle encircling loop, the reaction or back pull of the upper strap loop end tends to decrease this angle so that, as the tension increases, the surface of the feed wheel tends more closely to approach the tool foot and, as a consequence, more tightly pinch the two loop strap ends therebetween and cause
  • a package binder-strap tensioning tool comprising the combination with a main frame having a foot for resting on the package being bound and upon which ends of the package encircling loop of binder strap may lie in overlapping relation, and a finger grip with a camming surface at its forward upper part; of a tension mechanism frame pivotally attached to the main frame and carrying a shaft lying parallel to such pivotal attachment and upon which shaft are mounted for rotation therewith a feed wheel for pressing the upper of the overlapping strap loop ends against the lower and the lower against the foot of the main frame and a ratchet wheel for rotating the shaft, said shaft also journaling a tensioning handle carrying an actuating pawl which actively engages the ratchet wheel when the tensioning handle is rotated upon the shaft in one direction but inactively engages the ratchct wheel when the tensioning handle is moved in the opposite direction, said tensioning handle having a portion lying and oscillatable in the plane of the finger grip so that it may be brought into engagement with the camming surface of the finger grip and
  • a package binder-strap tensioning tool comprising the combination with a main frame having a foot for resting on the package being bound and upon which overlapping ends of the package encircling loop of binder strap may lie, said main frame having a finger grip and a camming surface formed on the finger grip at its forward upper part; of a tension mechanism frame pivotally attached to the main frame, said tension mechanism frame carrying a rotatable feed wheel for pressing the overlapping strap ends against the foot of the main frame and by rotation advancing the upper end relative to the lower end to tension the strap loop about the package, a ratchet wheel for rotating the feed wheel, a pivoted tensioning handle provided with an actuating pawl which actively or inactively engages the ratchet wheel depending upon which direction the tensioning handle is rocked, a
  • pivoted holding pawl for engaging the ratchet Wheel t prevent reverse rotation thereof when the tensioning handle is rocked through its inactive stroke, said tensioning handle being oscillatable in the plane of the finger grip so that when it is brought into contact with the camming surface of the finger grip and then further squeezed thereagainst it rotates the tensioning mechanism frame to move the feed wheel away from the foot of the main frame to open the tool for reception of the overlapping strap ends, and said tensioning handle having a projection lying in the plane of the holding pawl for engaging the holding pawl to move it out of engagement with the ratchet wheel by the time the handle strikes the camming surface of the main frame; and a biasing spring interconnecting the main frame and the tension mechanism frame for biasing the latter to carry the feed wheel toward the foot of the main frame to close the tool upon overlapping strap ends lying between the feed Wheel and the foot.
  • a package binder-strap tensioning tool comprising the combination with a main frame having a foot for resting on the package being bound and upon which the ends of package encircling loop of binder strap may lie in overlapping relation, and an elongated finger grip extending rearwardly of the foot parallel to the plane of the binder loop and provided on its forward top edge with a camming surface; of a shaft mounted on the main frame for rocking movement toward and away from the foot of the main frame, said shaft carrying a strap-feed wheel, a ratchet wheel for rotating the feed wheel and a tensioning handle provided with a pawl for rotating the ratchet wheel step-by-step in strap tensioning direction when the handle is oscillated about the shaft, a holding pawl for preventing reverse rotation of the ratchet and feed wheels, said handle lying in the same plane as the finger grip so that it may be brought down against the camming surface of the finger grip on the main frame and then further squeezed toward the finger grip to rock said shaft relative to the foot of the
  • a package binder-strap tensioning tool of the type having a main frame provided with a foot for resting on the package being bound with a loop of flexible metallic strap, a rotatable strap feed wheel mounted for bodily movement toward and away from the main frame foot respectively to grip and to release the loop strap ends, a ratchet wheel movable and rotatable with the feed wheel for rotating it, and a tensioning handle operatively connected to the ratchet and feed wheels bodily to move them and provided with an actuating pawl for actively and inactively engaging the ratchet wheel to rotate both wheels step-by-step in one direction when the tensioning handle is oscillated, characterized by the fact that the main frame is provided with a finger grip and a camming surface and the tensioning handle operates in the plane of the finger grip and camming surface so that the handle and camming surface may be brought into engagement and squeezed together to cause the handle to rock on the camming surface and bodily move the feed wheel away from the main frame foot.
  • a package binder-strap tensioning tool according to claim 4, further characterized by the fact that the ratchet wheel is engaged by a pivoted holding pawl to prevent reverse rotation and the tensioning handle is provided with a projection which when the handle is against said camming surface engages the holding pawl to keep it out of engagement with the ratchet wheel.
  • a package binder-strap tensioning tool according to claim 4, further characterized by the fact that the circumferential surface of the feed wheel is provided with teeth disposed diagonally thereacross, the diagonal direction being such that during operative rotation of the wheel the end of each tooth adjacent the outer edge of the wheel is in advance of the end of the tooth adjacent the inner edge of the wheel.
  • a package binder-strap tensioning tool of the type having a main frame provided with a foot for resting on the package being bound with a loop of flexible metallic strap, a rotatable strap feed wheel mounted for bodily movement toward and away from the main frame foot respectively to grip and to release the loop strap ends, a ratchet wheel movable and rotatable with the feed wheel for rotating it, and a tensioning handle operatively connected to the ratchet and feed wheels bodily to move them and provided with an actuating pawl for actively and inactively engaging the ratchet wheel to rotate both wheels step-by-step in one direction when the tensioning handle is oscillated, characterized by the fact that the main frame is provided with a finger grip and a camming surface and the tensioning handle operates in the plane of the finger grip and camming surface so that the handle and camming surface may be brought into engagement and squeezed together to cause the handle to rock on the camming surface and bodily move the feed wheel away from the main frame foot, and a spring
  • a package binder-strap tensioning tool according to claim 7, further characterized by the fact that the bodily movement of the feed wheel is provided by rotatably mounting the feed wheel upon a lever which is pivoted to the main frame and directed toward the foot thereof at an angle such that the feed wheel approaches the foot as strap tension increases to increase the pressure of the feed wheel upon the strap.
  • a package binder-strap tensioning tool according to claim 3 further characterized by the fact that the foot is provided with a roughened strap-anchoring surface which slopes downwardly from its front edge toward its rear edge to compensate for displacement of the feed wheel relative to the foot under increased pressure existing between the feed wheel and the foot.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
US66779A 1948-12-22 1948-12-22 Tensioning tool Expired - Lifetime US2621893A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US66779A US2621893A (en) 1948-12-22 1948-12-22 Tensioning tool
GB31450/49A GB662624A (en) 1948-12-22 1949-12-07 Tensioning tools
FR1002754D FR1002754A (fr) 1948-12-22 1949-12-13 Perfectionnements aux outils tendeurs
DES20043A DE885376C (de) 1948-12-22 1950-10-01 Spannwerkzeug fuer Ballenbereifung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US66779A US2621893A (en) 1948-12-22 1948-12-22 Tensioning tool

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US2621893A true US2621893A (en) 1952-12-16

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US66779A Expired - Lifetime US2621893A (en) 1948-12-22 1948-12-22 Tensioning tool

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US (1) US2621893A (fr)
DE (1) DE885376C (fr)
FR (1) FR1002754A (fr)
GB (1) GB662624A (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2834382A (en) * 1953-07-13 1958-05-13 Ernest Roe Gripper for wire tying machine
US2964295A (en) * 1956-03-29 1960-12-13 Acme Steel Co Strap stretching device
US2986376A (en) * 1956-09-24 1961-05-30 Acme Steel Co Strap tensioning tool
US3169011A (en) * 1963-09-10 1965-02-09 Stanley Works Feeding and tensioning tool for strapping and the like
US3232582A (en) * 1964-01-13 1966-02-01 Stanley Works Strap restraining means for the base of a strap tensioning device
US20030037832A1 (en) * 2001-05-25 2003-02-27 Nelson Cheung Strapping tool
US9221567B2 (en) 2012-01-25 2015-12-29 Southern Bracing Systems Enterprises, Llc Systems, methods, and devices for tensioning straps
US20180273219A1 (en) * 2017-03-23 2018-09-27 Hsiu-Man Yu Chen Strapping tool

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1075041B (de) * 1960-02-04 Erich Borbe, Zurich (Schweiz) Bandeisen Spann vorrichtung fur Bandumreifungen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1600833A (en) * 1918-12-30 1926-09-21 Cary Mfg Co Package-banding machine
DE597789C (de) * 1933-02-14 1934-06-04 Josef Bayer Spann- und Schliessvorrichtung fuer die Enden einer Bandbereifung von Packstuecken
US2187298A (en) * 1937-06-23 1940-01-16 American Steel & Wire Co Tensioning tool
US2229522A (en) * 1939-11-13 1941-01-21 Signode Steel Strapping Co Package binding tool

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1600833A (en) * 1918-12-30 1926-09-21 Cary Mfg Co Package-banding machine
DE597789C (de) * 1933-02-14 1934-06-04 Josef Bayer Spann- und Schliessvorrichtung fuer die Enden einer Bandbereifung von Packstuecken
US2187298A (en) * 1937-06-23 1940-01-16 American Steel & Wire Co Tensioning tool
US2229522A (en) * 1939-11-13 1941-01-21 Signode Steel Strapping Co Package binding tool

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2834382A (en) * 1953-07-13 1958-05-13 Ernest Roe Gripper for wire tying machine
US2964295A (en) * 1956-03-29 1960-12-13 Acme Steel Co Strap stretching device
US2986376A (en) * 1956-09-24 1961-05-30 Acme Steel Co Strap tensioning tool
US3169011A (en) * 1963-09-10 1965-02-09 Stanley Works Feeding and tensioning tool for strapping and the like
US3232582A (en) * 1964-01-13 1966-02-01 Stanley Works Strap restraining means for the base of a strap tensioning device
US20030037832A1 (en) * 2001-05-25 2003-02-27 Nelson Cheung Strapping tool
US6772798B2 (en) * 2001-05-25 2004-08-10 Illinois Tool Works, Inc. Strapping tool
US9221567B2 (en) 2012-01-25 2015-12-29 Southern Bracing Systems Enterprises, Llc Systems, methods, and devices for tensioning straps
US9428290B2 (en) 2012-01-25 2016-08-30 Southern Bracing Systems Enterprises, Llc Systems, methods, and devices for tensioning straps
US20180273219A1 (en) * 2017-03-23 2018-09-27 Hsiu-Man Yu Chen Strapping tool

Also Published As

Publication number Publication date
DE885376C (de) 1953-08-03
GB662624A (en) 1951-12-05
FR1002754A (fr) 1952-03-10

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