US3274921A - Control system for wire-tying apparatus - Google Patents

Control system for wire-tying apparatus Download PDF

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Publication number
US3274921A
US3274921A US431647A US43164765A US3274921A US 3274921 A US3274921 A US 3274921A US 431647 A US431647 A US 431647A US 43164765 A US43164765 A US 43164765A US 3274921 A US3274921 A US 3274921A
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US
United States
Prior art keywords
valve
wire
motor
track
cylinder
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
US431647A
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English (en)
Inventor
Marchand B Hall
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.)
United States Steel Corp
Original Assignee
United States Steel 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 United States Steel Corp filed Critical United States Steel Corp
Priority to US431647A priority Critical patent/US3274921A/en
Priority to GB54811/65A priority patent/GB1124366A/en
Priority to FR43771A priority patent/FR1461911A/fr
Priority to BE674607D priority patent/BE674607A/xx
Priority to NL6517275A priority patent/NL6517275A/xx
Application granted granted Critical
Publication of US3274921A publication Critical patent/US3274921A/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
    • B65B13/02—Applying and securing binding material around articles or groups of articles, e.g. using strings, wires, strips, bands or tapes
    • 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
    • B65B13/28—Securing ends of binding material by twisting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means

Definitions

  • wire-tying apparatus shown in the drawing is of the type shown and described in detail in co-pending application Serial No. 431,618, filed February 10, 1965, and will be shown and described herein only to the extent necessary for a clear understanding of the control system of the invention.
  • the wire-tying apparatus shown in the drawing includes a pair of pinch rolls 4, operated by a hydraulic motor 6, for feeding tie wire W through a twister pinion 8, past a gripper 10, around a continuous guide track 12 and through the twister pinion a second time and then into the jaw of the gripper.
  • pinch rolls 4 function to retract the tire wire, strip it out of the guide track and tension it around a package P within the guide track.
  • a sector gear 14, in mesh with the twister pinion 8 is actuated to rotate the pinion and twist the overlapped ends of the tie wire to gether.
  • the knot thus formed is then cut free from the supply wire and ejected from the pinion.
  • the sector gear 14 of the wire'tying apparatus is operated by a roller 16 carried by a cam plate 28, which, in turn, is attached to and actuated by a piston rod 20 of a double-acting hydraulic pressure cylinder 22.
  • a pivoted jaw 24 of the gripper 10, which cooperates with a fixed jaw 25, is attached to and actuated by the piston rod 26 of a double-acting hydraulic pressure cylinder 28.
  • the control system of the invention is shown schematically in the single figure of the drawing and includes a hydraulic pump 30 connected directly with and driven by an electric motor 32 to circulate hydraulic fluid under pressure throughout the system from a reservoir 34.
  • the pump 30 is connected with a reversing, directional, threeposition, four-way valve 36, operated in one direction by a feed electric solenoid 38 and in the other direction by a tension solenoid 46.
  • a fluid line 42 is connected with the feed outlet port of valve 36 at one end and extends therefrom to a juncture 44 with two lines 46 and 48.
  • Line 46 extends from the juncture to the head end of cylinder 28, while line 48 extends from the juncture to the feed side of "ice hydraulic motor 6.
  • the line 48 is also connected with head end of cylinder 22 by a line 59.
  • a line 52 is connected with valve 36 at its tension outlet port at one end and extends therefrom to a juncture 54 with lines 56 and 53.
  • Line 56 extends from juncture 54 to the rod end of cylinder 22, while line 58 extends to a juncture 66 with lines 62 and 64.
  • Line 62 extends from juncture to the tension side of hydraulic motor 6, and line 64 extends to the rod end of cylinder 28.
  • a check valve 66 is provided in the line 56, and a variable sequence valve 68 is connected in circuit with lines 56 and 58.
  • Check valve 66 permits relief flow of hydraulic fluid from the rod end of cylinder 22 but prevents flow of fluid directly from valve 36 to the rod end of cylinder.
  • flow of hydraulic fluid to the rod end of cylinder 22 occurs only when variable sequence valve 68 is open.
  • a flowrestricting orifice 70 is provided in the line 62, and a normally-closed, free-flow, two-way valve 72 is provided to bypass the orifice '70 at certain stages of operation, as will become apparent.
  • Valve 72 is operated by a solenoid 74.
  • switches 76 and 78 are closed and the following sequence of operations occurs:
  • Switch 76 remains closed and electric motor 32, connected in circuit therewith, runs continuously during the tying cycle.
  • Hydraulic fluid from valve 36 then flows through lines 52, 58 and 64 to the rod end of cylinder 28 to retract its piston rod 26 and pivot the jaw 24 ⁇ of gripper it) toward the fixed jaw 25 and grip the end of wire W therebetween.
  • hydraulic fluid flows through lines 52 and 58, through open-valve 72, bypassing orifice 7t and thence through line 62 to the tension side of hydraulic motor 6.
  • Motor 6 then drives pinch rolls 4 to retract the wire W and tension it around the package P.
  • variable sequence valve 68 As the wire W draws around the package and tightens, the pressure in the system increases until it reaches a predetermined pressure value to which variable sequence valve 68 has been preset. Then the sequence valve opens and allows hydraulic fluid to flow through line 56 to the rod end of cylinder 22 to retract the piston rod 20 thereof.
  • a sequence valve used in conventional manner would allow flow to the hydraulic motor 6, causing tensioning, and prevent hydraulic fluid flow to the knotter cylinder 22 until the pressure setting of the sequence valve was reached. Then the pressure in both the hydraulic motor 6 and the cylinder 22 would be controlled only through the resistance of cylinder 28, if above the pressure value setting of the sequence valve. This could cause excessive tension and also cause the tire wire to tension out of the feed-and-tension pinch rolls of the apparatus as soon as the knotter reached the point in the cycle when the completed knot is cut (before ejection).
  • variable sequence value 68 opens, the piston rod 20 removes a short distance and starts counterclockwise movement of cam plate 18 which latter movement causes opening of switch and closing of valve 72. This then allows only a small amount of hydraulic fluid to reach the hydraulic motor 6 through the orifice 70', and the pressure-drop across the orifice prevents excessive tensioning.
  • the reduced flow of hydraulic fluid through the orifice 76 during knotting compensates for leakage of fluid through the motor 6 and keeps the wire taut.
  • valve 72 and orifice 70 of the control system of the invention are utilized a second time during operation of the system for a different purpose.
  • the wire is fed around the track at a high rate of speed when the solenoid-operated valve 72 is open. If the wire were fed at such high rate of speed during the entire feeding sequence, the leading end thereof would extend beyond the gripper 10 an objectionable amount after the feeding sequence was completed.
  • the valve-operating solenoid 74 is de-energized the valve 72 is closed as the leading end of the wire approaches the twister pinion 3 a second time.
  • Hydraulic fluid flowing through the motor 6 then must flow through the orifice 70, which reduces the flow considerably so that the speed of motor 6, and, consequently, the speed of the wire being fed, is greatly reduced. This reduced speed makes it possible to stop the feeding more accurately and minimize variations in the length of wire extending beyond the twister or knot portion of a tie.
  • control system of the invention is used in conjunction with wire-tying apparatus which includes joining means in the form of a twister pinion
  • system of the invention can be used in conjunction with wire-tying apparatus which includes joining means other than a twister pinion, for example, a seal-applying joining means.
  • a control system for a wire-tying apparatus including a guide track for the wire, joining means forming a portion of said track, a gripper jaw pivoted adjacent the far end of said means in the direction in which wire is fed through the track, pinch rolls eflective to feed wire into said track and on reversal to tension a tie wire about an article within said track, said system comprising a reversible fluid motor driving said pinch rolls, a fluid pressure cylinder connected with said joining means, a fluid circuit connected to said motor and to said cylinder, a reversing valve in said circuit, first means actuating said valve to direct fluid toward said motor, and to said cylinder to operate said cylinder to move said joining means to initial operating position, a fullflow valve in said fluid circuit between said reversing valve and said motor, means for operating said full-flow valve, means operated by completion of the movement of said joining means to initial operating position connected with said full-flow valve-operating means effective to actuate the same to open said full-flow valve after said joining means reaches initial operating position
  • a control system as defined by claim 1 characterized by a flow-restricting orifice in said fluid circuit, a bypass around said orifice, said full-flow valve being in said by-pass, said full-flow valve-operating means comprising a solenoid, and means actuated by the second passage of said tie Wire into said joining means in electrical circuit with said solenoid eflective to de-energize said solenoid to close said full-flow valve.
  • a control system as defined by claim 1 characterized by a flow-restricting orifice in said fluid circuit, a by-pass around said orifice, said full-flow valve being in said by-pass, said full-flow valve operating means comprising a solenoid, and said means operated by completion of the movement of the joining means to initial operating position being a switch in electrical circuit with said solenoid.
  • a control system as defined by claim 1 characterized by switch means actuated by final movement of said joining means in joint-forming direction, said switch means being in electrical circuit with said first and said second reversing-valve actuating means, said switch means being adapted when actuated to de-energize said second reversing-valve actuating means and energize said first reversing-valve actuating means.
  • a control system as defined by claim 1 characterized by a switch in electrical circuit with said second reversing-valve actuating means effective to operate the same after said tie wire has been fed through said joining means, around said track and through said joining means a second time.
  • a control system for a wire-tying apparatus as defined by claim 1 characterized by a fluid pressure cylinder connected with said gripper jaw for actuating the same, said last-mentioned cylinder being in said fluid circuit between said reversing valve and said gripper jaw in parallel with said motor whereby said last-mentioned cylinder is operated to open said gripper jaw when said first reversing-valve actuating means actuates said reversing valve to direct fluid towards said motor, and to close said gripper jaw when said second reversing-valve actuating means actuates said reversing valve to operate said motor to drive said pinch rolls in the reverse direction to retract said tie wire from said track.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Basic Packing Technique (AREA)
US431647A 1965-02-10 1965-02-10 Control system for wire-tying apparatus Expired - Lifetime US3274921A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US431647A US3274921A (en) 1965-02-10 1965-02-10 Control system for wire-tying apparatus
GB54811/65A GB1124366A (en) 1965-02-10 1965-12-24 Control system for wire-tying apparatus
FR43771A FR1461911A (fr) 1965-02-10 1965-12-27 Dispositif de commande pour machine à cercler des colis ou autres avec un fil métallique
BE674607D BE674607A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1965-02-10 1965-12-31
NL6517275A NL6517275A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1965-02-10 1965-12-31

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US431647A US3274921A (en) 1965-02-10 1965-02-10 Control system for wire-tying apparatus

Publications (1)

Publication Number Publication Date
US3274921A true US3274921A (en) 1966-09-27

Family

ID=23712840

Family Applications (1)

Application Number Title Priority Date Filing Date
US431647A Expired - Lifetime US3274921A (en) 1965-02-10 1965-02-10 Control system for wire-tying apparatus

Country Status (5)

Country Link
US (1) US3274921A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE674607A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR1461911A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1124366A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL6517275A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3447447A (en) * 1967-02-21 1969-06-03 Stanley Works Strapping mechanism
US3447448A (en) * 1967-03-13 1969-06-03 Ovalstrapping Inc Wire tying machines
US3854396A (en) * 1973-07-12 1974-12-17 D Sargent Twine measuring trip mechanism for balers
US4062278A (en) * 1976-12-20 1977-12-13 Signode Corporation Expanding strap loop forming and friction fusion machine
US4252157A (en) * 1979-01-09 1981-02-24 Takigawa Kogyo Co., Ltd. Automatic bundling apparatus
USRE31353E (en) * 1976-12-20 1983-08-23 Signode Corporation Expanding strap loop forming and friction fusion machine
US4817519A (en) * 1986-10-10 1989-04-04 Stanwich Holdings, Inc. Wire feed and tensioning apparatus
CN109340201A (zh) * 2018-11-08 2019-02-15 柳州钢铁股份有限公司 棒材打捆机液压系统

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6968779B2 (en) 2000-03-15 2005-11-29 Enterprises International, Inc. Apparatus and methods for wire-tying bundles of objects
US6584891B1 (en) * 2000-03-15 2003-07-01 Enterprises International, Inc. Apparatus and methods for wire-tying bundles of objects
CN108438852B (zh) * 2018-03-08 2024-07-26 中储粮镇江粮油有限公司 一种多功能运辊操作平台

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2707430A (en) * 1949-12-22 1955-05-03 Signode Steel Strapping Co Automatic strapping machine
US2908215A (en) * 1957-05-01 1959-10-13 United States Steel Corp Guide track and compressor for automatic wire-tying machine
US3116681A (en) * 1961-05-18 1964-01-07 Metaverpa Nv Packaging machine
US3120171A (en) * 1958-01-28 1964-02-04 Acme Steel Co Automatic strapping machine
US3126686A (en) * 1964-03-31 Automatic strapping machine
US3139813A (en) * 1961-10-02 1964-07-07 Acme Steel Co Strapping machine
US3146695A (en) * 1961-12-26 1964-09-01 Metaverpa Nv Packaging machine
US3179037A (en) * 1961-11-27 1965-04-20 Warrenton Marine Services Inc Preformed loop type binding machine
US3183824A (en) * 1962-11-13 1965-05-18 Package Sealing Company Export Package binding machines
US3215064A (en) * 1964-05-25 1965-11-02 A J Gerrard Mfg Co Automatic strapping and sealing machine

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126686A (en) * 1964-03-31 Automatic strapping machine
US2707430A (en) * 1949-12-22 1955-05-03 Signode Steel Strapping Co Automatic strapping machine
US2908215A (en) * 1957-05-01 1959-10-13 United States Steel Corp Guide track and compressor for automatic wire-tying machine
US3120171A (en) * 1958-01-28 1964-02-04 Acme Steel Co Automatic strapping machine
US3116681A (en) * 1961-05-18 1964-01-07 Metaverpa Nv Packaging machine
US3139813A (en) * 1961-10-02 1964-07-07 Acme Steel Co Strapping machine
US3179037A (en) * 1961-11-27 1965-04-20 Warrenton Marine Services Inc Preformed loop type binding machine
US3146695A (en) * 1961-12-26 1964-09-01 Metaverpa Nv Packaging machine
US3183824A (en) * 1962-11-13 1965-05-18 Package Sealing Company Export Package binding machines
US3215064A (en) * 1964-05-25 1965-11-02 A J Gerrard Mfg Co Automatic strapping and sealing machine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3447447A (en) * 1967-02-21 1969-06-03 Stanley Works Strapping mechanism
US3447448A (en) * 1967-03-13 1969-06-03 Ovalstrapping Inc Wire tying machines
US3854396A (en) * 1973-07-12 1974-12-17 D Sargent Twine measuring trip mechanism for balers
US4062278A (en) * 1976-12-20 1977-12-13 Signode Corporation Expanding strap loop forming and friction fusion machine
USRE31353E (en) * 1976-12-20 1983-08-23 Signode Corporation Expanding strap loop forming and friction fusion machine
US4252157A (en) * 1979-01-09 1981-02-24 Takigawa Kogyo Co., Ltd. Automatic bundling apparatus
US4817519A (en) * 1986-10-10 1989-04-04 Stanwich Holdings, Inc. Wire feed and tensioning apparatus
CN109340201A (zh) * 2018-11-08 2019-02-15 柳州钢铁股份有限公司 棒材打捆机液压系统

Also Published As

Publication number Publication date
FR1461911A (fr) 1966-12-09
GB1124366A (en) 1968-08-21
NL6517275A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1966-08-11
BE674607A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1966-06-30

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