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US3545499A - Sealer head mechanism of an automatic strapping machine - Google Patents

Sealer head mechanism of an automatic strapping machine Download PDF

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Publication number
US3545499A
US3545499A US767417A US3545499DA US3545499A US 3545499 A US3545499 A US 3545499A US 767417 A US767417 A US 767417A US 3545499D A US3545499D A US 3545499DA US 3545499 A US3545499 A US 3545499A
Authority
US
United States
Prior art keywords
strapping
links
sealer
piston
main plate
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
US767417A
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English (en)
Inventor
Jack J Dalton
John J Linehan
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.)
Cyclops Corp
Original Assignee
Cyclops Corp
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 Cyclops Corp filed Critical Cyclops Corp
Application granted granted Critical
Publication of US3545499A publication Critical patent/US3545499A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B65B13/24—Securing ends of binding material
    • B65B13/30—Securing ends of binding material by deforming the overlapping ends of the strip or band
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/14—Mode converters

Definitions

  • ABSTRACT A sealer for an automatic strapping machine in which a frame carrying a shdable upper die and a stationary lower die is pivotally mounted to a stationary main plate. A pneumatically actuated toggle joint is mounted in the frame, [54] SEALER E i ggg OF AN AUTOMATIC one link thereof being connected to the pivotal mounting STRAiPPIND Fl between the main plate and the frame and the other link being 6 ch raw connected to the slidable upper die. A stop means prevents [52] [1.8.
  • Our invention relates to a sealer for an automatic strapping tool. More particularly, it relates to a sealer by which overlapped lays of strapping material are interlocked by die-cut notching.
  • a continuous strip of strapping is fed around the object to be strapped and two lays of the strapping are overlapped.
  • the strapping is tensioned and the overlapped lays are fastened.
  • the lays may be fastened by 'placing a separate sealing member around the lays or by die-cut notching which interlocks the two overlapped lays of strapping.
  • the overlapped lays are positioned between an upper and lower die which are brought together to provide the interlocking crimp. After the dies are separated, the lower die must be removed from its position between the joined strapping and the object being strapped.
  • the links are dimensioned so that when in line the upper die will be forced against the lower die with a sealing force.
  • Means are provided for applying a force to the connection between the two links of the toggle joint.
  • the means is capable of applying sufficient force to move the links from an angular position to an beyond the: alined position.
  • a stop means is positioned to prevent further movement of the toggle joint relative to main plate after passage through the alined position whereby the continuing force pivots the frame about the main plate.
  • FIG. 1 is a schematic illustration of a complete strapping unit
  • FIG. 2 is a longitudinal section through our sealer showing the position of the elements prior to the start of the sealing cysealer at the time in the cycle when the maximum stroke of the piston has been completed and the head stripped from the sealed strapping.
  • Feed means 4 includes a drive wheel 13 and an idler wheel 13'. Rotation of the drive wheel clockwise feeds strapping from source 8 to path 9 of the track assembly and clockwise around the path, through gripper means 5 and through sealer 6. Thelead end of the strapping material passes through the sealer a second time so that two lays of the strapping l0 overlap in the sealer between upper cripping die 11 and lower crimping die' 12. As the lead end of the strapping The overall assembly of a strapping unit in which our invention may be incorporated is shown in FIG. 1.
  • a frame (not shown) supports a head 1 and a track 2.
  • the head includes a main plate 3 on which feed, means 4, gripping means 5 and sealer 6 are mounted.
  • a track switch (not shown) is mounted on the main plate between the gripper and the sealer.
  • the track assembly 2 provides a continuous path 9 for strapping material around an opening 7 into which the objects 7' to be material passes between the dies at second time, the track switch stops the drive wheel. Filling the track with strapping material is the first step in preparing the unit for use. However, in an automatic or semiautomatic cycle, it is usually the last step in the sequence.
  • the gripper assembly 5 is energized causing two grippingfingers 14 to secure the second lay of strapping against a fixed shear edge 39 (see FIG. 3) separating the opposite ends of the strapping. This restraint secures the overlapped lay of strapping in between the crimping dies.
  • the drive wheel 13 is reversed. The counterclockwise rotation of the drive wheel extracts the strapping 10 from a spring-loaded (not shown) restraint of the tack assembly 2 and lays it snugly around the object to be strapped. Continued rotation of the drive wheel tensions the strapping about the 'object. When an ultimate desired tension is secured in the strapping (between the gripper finger l4 and the drive wheel 13), a signal is given which initiates the sealing action.
  • the sealer '6 in which our invention resides is pivotally mounted to stationary main plate 3. It has a frame which con sists of a top plate 3l,side' plates 30 whichare bolted to the top plate, a cylinder body 29 which isbolted to the sideplates, and a bottom plate 32 fastened to the main plate 3. Pin 26 extends through extension plates 25 andsideplates 30 pivotally connecting the frame to the main plate.
  • the two lays of strapping are fastened to each other by diecut notching which interlock the two lays.
  • This is accomplished by a pair of mating dies 11 and 12.
  • 'Upper die 11 is mounted in a crosshead piston 27 which is slidably mounted in cylinder body 29.
  • Lower die 12 is mounted on a sealer foot 35, which is affixed to a projection of the cylinder body and extends under the open lower end of cylinder body 29 and under the crosshead piston. Downward movement of the crosshead piston brings the two die members into contact whereby an interlocking seal can be made between the two lays of strapping positioned between the die members.
  • Movement of the crosshead piston 27 is controlled by a toggle joint mounted within the frame.
  • the toggle joint is composed of a pair of identical upwardly extending links 22 and a pair of identical downwardly extending links 23, all of which have one end pivotally mounted on a pin 24.
  • the downwardly extending links 23 are connected at the other end to the crosshead piston 27 by pin 28.
  • the other end of the upwardly extending links 22. are connected to pin 26 about which the entire frame is pivotally mounted as described above.
  • the force which straightens the links is applied to the connection between the links by a power cylinder 15 which is mounted on the rear end of the frame behind main plate 3 by bolts51 which fasten the front wall 52 of the cylinder to top plate 31 and bottom plate 32.
  • the power cylinder includes a piston 16 connected to piston rod 17 which extends through the forward wall 52 of the cylinder and through an opening in the main plate.
  • the rod is connected by two links to the knee of the toggle joint.
  • One end of each link 21 is pivotally connected to rod 17 by pin and the other end of each link is pivotally connected to pin 24 which connects the links 22 and 23 forming the toggle joint.
  • the piston 16 is biased by spring 19 toward the rear wall 53.
  • a tap 18 in the rear wall is adapted to be connected to a source of air under pressure.
  • O-rings or other suitable gasket means (not shown) will be provided on the periphery of the piston to prevent leakage of the air around the piston.
  • the cylinder and piston rod are dimensioned so that the piston not only causes the links of the toggle joint to straighten out and effectuate a seal as described above but also to move beyond the alined position (see FIG. 5). As the piston forces the links past the alined position, the force on crosshead piston 27 is removed as it moves away from the interlocked strapping.
  • a stop member 36 is attached to the main plate and extends forwardly from the plate between the two upwardly extending links 22 and terminating in a downwardly extending projection 60 positioned in a vertical plane which is forward of the plane of the links when alined.
  • a stop pin 37 extends between the two upwardly extending links at a position to contact projection 60 after the piston .has forced the links beyond the alined position as shownin FIG. 5. The stop means prevents further movement of the toggle joint relative to the main plate.
  • Stop 36 can also be made adjustable, for example, by making it in two pieces connected by bolts which can be adjusted to change the position of the forward segment having projection 60 relative to the main plate.
  • pin 26 is formed with an eccentric portion 26' between the two upwardly extending links 22 which permits proper spacing of the crimping dies (see FIG. 3).
  • pin 26 On one end, pin 26 is cylindrical in shape extending through one extension plate 25, bushing 45 and sideplate 30.
  • the portion 26' of the pin extending between the two links 22 is eccentric having a greater radius on one side than on the other.
  • the other end'of pin 26 is shaped to conform with opening 43 in washer 42 through which it extends. Washer 42 is fastened to extension plate 25 by lock screw 41 and can rotate within the confines of opening 44. As the washer moves about fixed lock screw 41, the pin 26 rotates changing the position of the eccentric portion 26' of the pin. This, in turn, raises or lowers upwardly extending links 22 which are connected to pin 26 and thus the distance between the upper and lower dies.
  • Pin 28 which connects links 23 to crosshead piston 27 has a flattened portion 28 which extends beyond one side of cylinder body 29 to a position directly above movable shear blade 40 (see FIG. 3).
  • portion'28' of pin 28 contacts shear blade 40 forcing it downward and the upper lay of strapping material is cut between shear blade 40 and fixed shear edge 39.
  • the shear blade is spring biased and returns to its original position when pin 28 moves out of contact with it.
  • each arm is composed of a pair of links
  • a single link could be used for each arm.
  • a single link could be used to connect the piston rod to the knee of the toggle joint.
  • a sealer for a strapping unit in which two lays of strapping material are fastened by die-cut notching comprisii. the second link of the toggle joint being pivotally connected to the upper slidable die;
  • the two links of the toggle joint being dimensioned so that when in line the upper die will be forced against the lower die with a sealing force
  • F. means for applying a force to the connection between the two links of the toggle joint, said means being capable of applying sufficient force to move the links from an angular position to and beyond the alined position;
  • stop means positioned'to prevent further movement of the toggle joint relative to the main plate after passage through the alined position whereby continued application of the force pivots the frame about the main plate.
  • a sealer as set fort in claim 1 wherein the means for applying a force to the connection between the two links of the toggle joint includes:
  • a sealer as set forth in claim 1 wherein the stop means includes:
  • a stop member attached to the main plate an extending forwardly from the plate, said stop member terminating in a projection positioned to contact the stop pin after the toggle joint has passed through the alined position.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Basic Packing Technique (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
US767417A 1968-10-14 1968-10-14 Sealer head mechanism of an automatic strapping machine Expired - Lifetime US3545499A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US76741768A 1968-10-14 1968-10-14

Publications (1)

Publication Number Publication Date
US3545499A true US3545499A (en) 1970-12-08

Family

ID=25079421

Family Applications (1)

Application Number Title Priority Date Filing Date
US767417A Expired - Lifetime US3545499A (en) 1968-10-14 1968-10-14 Sealer head mechanism of an automatic strapping machine

Country Status (7)

Country Link
US (1) US3545499A (xx)
BE (1) BE740259A (xx)
CH (1) CH497317A (xx)
DE (1) DE1950825A1 (xx)
FR (1) FR2020692A1 (xx)
GB (1) GB1247288A (xx)
NL (1) NL6915465A (xx)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3804001A (en) * 1971-07-07 1974-04-16 Hoesch Werke Ag APPARATUS FOR APPLYING BALING BANDS AROUND BALES OF COMPRESSIBLE AND EXPANDABLE MATERIAlL
US4089352A (en) * 1977-02-22 1978-05-16 Fromm Ag Apparatus for positively connecting two overlapping band portions
WO1987001674A1 (en) * 1985-09-23 1987-03-26 Uss Engineers And Consultants, Inc. Seal-less strapping head
US4709627A (en) * 1985-08-02 1987-12-01 ACME P.W. Lenzen GbmH & Co. KG Locking sleeve magazine feed attachment for a device for sealing steel wrapping bands
US4739700A (en) * 1985-09-23 1988-04-26 U.S. Steel Supply Inc. Seal-less strapping head
US7428867B1 (en) * 2007-09-07 2008-09-30 Illinois Tool Works Inc. Self-energizing gripper for strapping machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3804001A (en) * 1971-07-07 1974-04-16 Hoesch Werke Ag APPARATUS FOR APPLYING BALING BANDS AROUND BALES OF COMPRESSIBLE AND EXPANDABLE MATERIAlL
US4089352A (en) * 1977-02-22 1978-05-16 Fromm Ag Apparatus for positively connecting two overlapping band portions
US4709627A (en) * 1985-08-02 1987-12-01 ACME P.W. Lenzen GbmH & Co. KG Locking sleeve magazine feed attachment for a device for sealing steel wrapping bands
WO1987001674A1 (en) * 1985-09-23 1987-03-26 Uss Engineers And Consultants, Inc. Seal-less strapping head
US4739700A (en) * 1985-09-23 1988-04-26 U.S. Steel Supply Inc. Seal-less strapping head
US7428867B1 (en) * 2007-09-07 2008-09-30 Illinois Tool Works Inc. Self-energizing gripper for strapping machine
CN101778772B (zh) * 2007-09-07 2012-03-21 伊利诺斯工具制品有限公司 用于包装机的自激励抓器

Also Published As

Publication number Publication date
CH497317A (de) 1970-10-15
DE1950825A1 (de) 1970-05-06
NL6915465A (xx) 1970-04-16
FR2020692A1 (xx) 1970-07-17
GB1247288A (en) 1971-09-22
BE740259A (xx) 1970-03-16

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