EP1098832B1 - Entangling protection arrangement for a thread feeding buffer - Google Patents

Entangling protection arrangement for a thread feeding buffer Download PDF

Info

Publication number
EP1098832B1
EP1098832B1 EP99908053A EP99908053A EP1098832B1 EP 1098832 B1 EP1098832 B1 EP 1098832B1 EP 99908053 A EP99908053 A EP 99908053A EP 99908053 A EP99908053 A EP 99908053A EP 1098832 B1 EP1098832 B1 EP 1098832B1
Authority
EP
European Patent Office
Prior art keywords
thread
guide
movable
thread guide
brake surface
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
EP99908053A
Other languages
German (de)
French (fr)
Other versions
EP1098832A1 (en
Inventor
Peder Jönsson
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.)
Applicator System AB
Original Assignee
Applicator System AB
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
Priority claimed from US09/033,817 external-priority patent/US5988553A/en
Application filed by Applicator System AB filed Critical Applicator System AB
Publication of EP1098832A1 publication Critical patent/EP1098832A1/en
Application granted granted Critical
Publication of EP1098832B1 publication Critical patent/EP1098832B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/20—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage
    • 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

Definitions

  • the present invention is related to a thread feeding buffer for feeding a fibre thread from a magazine roll to a feed apparatus at a robot arm which is freely movable in the room, and of the type, which is described in EP 0 745 055 & WO 95/21787 or US patent 5.906.330.
  • fibre reinforced thermosetting plastic products can be automatized by the use of an industrial robot, by means of which a fibre feed apparatus can be controlled, so that precise amounts of fibers are fed out which are oriented for maximum strength, without the fibers projecting out through the outer plastic layer of the product. Owing to the repeatability of the robot, the quality of these products can be increased considerably, simultaneously as problems related to bad work environment and labor fatigue can be solved.
  • the fibre feeding apparatus is preferably located in a feedout head which can be mounted upon a movable robot arm.
  • One or more fibre threads are supplied to the feedout head, which cuts the threads in suitable lengths.
  • the feeding speed of the fibre thread can be in the range of about 10 meters per second. At such a feeding speed, it is difficult to stop the feeding of thread without any risk of getting the thread tangled.
  • the object of the invention is therefore to provide an arrangement at a thread feeding buffer which solves the above described problem.
  • the entangling protection arrangement for a thread feeding buffer for a fibre thread fed from a supply and along a path comprising a first guide for the thread, for receiving the thread from the supply, a contactable brake surface over which the thread is fed from the first guide; a brake element movable into contact with the brake surface for braking movement of the thread past the brake surface; a movable thread guide in the path of the thread past the brake surface, a support comprising two substantially vertically arranged guide rods supporting the movable thread guide for movement; a further guide following the movable thread guide in the path of the thread and past which the thread is drawn; the support enabling the movable thread guide to be moved upwardly by the thread to reduce the length of the thread path between the brake surface and the further thread guide upon the brake element engaging the brake surface and also permitting the movable thread guide to move downward to lengthen the distance between the brake surface and the further thread guide to absorb slack in the thread on the path between the brake surface and the further thread guide, is characterized in that at least
  • the thread feeding buffer comprises a stand 10 with two vertical guide rods 11.
  • the stand 10 carries an elbow arm 12 with a thread eyelet 13 for a thread 15 which is wound off from a roll 14.
  • the thread can consist of a multiple fibre thread of glass, carbon fibre or synthetic fibre.
  • the thread eyelet 13 provides for a substantially friction free passage of the thread.
  • the thread runs upwards from the roll 14 which is located at ground level, through the thread eyelet 13 and further over a bar 16 which changes the direction of pull back vertically down between the guide rods 11.
  • a thread guide 17 is movably guided by the guide rods and is provided with further thread eyelets 13', through which the thread 15 runs. Then the thread runs on from the thread guide 17 in the direction upwards to a thread guide channel 18, which guides the thread further to a not shown robot arm.
  • a thread brake cooperates with the bar 16 and is composed of a clamp plate 19, which is mounted at the outer end of a pneumatic cylinder 20 which is connected to the stand 10.
  • the clamp plate can be brought in or out of engagement with the bar 16 by operation of the cylinder 20, whereby the feeding of the thread will be stopped.
  • the thread feeding buffer operates in the following way: During normal thread feeding, the pulling of the thread, via the thread eyelets 13, 13' and the bar 16, creates an even resistance in the thread which results in an advantageous even outfeed. If the robot arm is moving in the room, so that more or less thread has to be fed out momentarily, the thread guide 17 will be able to move up and down respectively along the guide rods 11, wherein the thread will receive a rapid compensation in length.
  • a first one of the vertical guide rods 11 of the stand 10 at its lower end is movable by being supported in a direction to and from the opposite vertical guide rod by means of a ball 21 or the like being movable in a transverse groove 22.
  • the lower end of the said first vertical guide rod 11 is in its neutral position, as shown in Fig. 1, where the yoke 13' provided with the movable thread guide 17 is moving upwards.
  • the movement of the yoke 13' is preferably monitored by a sensor 24 thus that a rapid downward movement of the yoke 13' makes the sensor emit a signal for activating the force piston 23.
  • This sensor is preferably connected to a central unit 25 receiving a signal from the sensor 24, representing the current speed of the yoke, whereby the signal is compared to a threshold value in said central unit, whereby the central unit is arranged to emit an output activating the force piston 23 when the sensed downward speed of the yoke exceeds said threshold value.
  • the guide rods can be exchanged for other means for controlling a buffer of fibre thread.
  • a spring means can replace the action of gravity upon the thread guide means 17.

Landscapes

  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Paper (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Moulding By Coating Moulds (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Nonwoven Fabrics (AREA)
  • Filtration Of Liquid (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Polarising Elements (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Buffer Packaging (AREA)
  • Wrappers (AREA)
  • Packages (AREA)
  • Details Of Indoor Wiring (AREA)
  • Communication Cables (AREA)

Abstract

A thread feeding buffer for feeding a fibre thread (15) from a magazine roll (14) to a feed apparatus at a robot arm which is freely movable in the room. The thread feeding buffer comprises thread brake means (16, 19, 20) and at least one movable thread guide (17), on which a thrust force is acting. The thread is running from the magazine roll (14), via the brake means (16, 19, 20), through the thread guide (17) and further on towards the feed apparatus in such a way, that the thrust force acts for creation of a thread buffer between the brake means and the feed apparatus, which buffer is variable in length. At least one guide rod for guiding the movable thread guide is provided with means arranged to cause a braking effect on downward movement of the movable thread guide for preventing entanglement of the thread fed through the movable thread guide following a rapid fall of said movable thread guide.

Description

    FIELD OF THE INVENTION
  • The present invention is related to a thread feeding buffer for feeding a fibre thread from a magazine roll to a feed apparatus at a robot arm which is freely movable in the room, and of the type, which is described in EP 0 745 055 & WO 95/21787 or US patent 5.906.330.
    • BACKGROUND OF THE INVENTION
  • The production of fibre reinforced thermosetting plastic products can be automatized by the use of an industrial robot, by means of which a fibre feed apparatus can be controlled, so that precise amounts of fibers are fed out which are oriented for maximum strength, without the fibers projecting out through the outer plastic layer of the product. Owing to the repeatability of the robot, the quality of these products can be increased considerably, simultaneously as problems related to bad work environment and labor fatigue can be solved.
  • The fibre feeding apparatus is preferably located in a feedout head which can be mounted upon a movable robot arm. One or more fibre threads are supplied to the feedout head, which cuts the threads in suitable lengths. The feeding speed of the fibre thread can be in the range of about 10 meters per second. At such a feeding speed, it is difficult to stop the feeding of thread without any risk of getting the thread tangled.
  • The features defined in the above mentioned older application solve in an efficient manner the problems defined above. However it has proven itself that there can still occur some risk for entanglement when the yoke provided with the movable thread guide moves downwards at a high speed. When the yoke then reaches its lower position there might be a bounce making the fed fibre thread slacken and become tangled.
    • THE TECHNICAL PROBLEM
  • The object of the invention is therefore to provide an arrangement at a thread feeding buffer which solves the above described problem.
    • THE SOLUTION
  • For this purpose the entangling protection arrangement for a thread feeding buffer for a fibre thread fed from a supply and along a path comprising a first guide for the thread, for receiving the thread from the supply, a contactable brake surface over which the thread is fed from the first guide; a brake element movable into contact with the brake surface for braking movement of the thread past the brake surface; a movable thread guide in the path of the thread past the brake surface, a support comprising two substantially vertically arranged guide rods supporting the movable thread guide for movement; a further guide following the movable thread guide in the path of the thread and past which the thread is drawn; the support enabling the movable thread guide to be moved upwardly by the thread to reduce the length of the thread path between the brake surface and the further thread guide upon the brake element engaging the brake surface and also permitting the movable thread guide to move downward to lengthen the distance between the brake surface and the further thread guide to absorb slack in the thread on the path between the brake surface and the further thread guide, is characterized in that at least one of said guide rods is provided with means arranged to cause a braking effect on the downward movement of the movable thread guide for preventing entanglement of the thread fed through the movable further tread guide following a rapid fall of said movable thread guide.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The invention will hereinafter be described with reference to an embodiment schematically shown in the accompanying drawing, in which
    • Fig. 1
    is a plane view of a thread feeding buffer according to the invention, with the movable thread guide moving upwards, and
    Fig. 2
    a corresponding view showing the movable thread guide according to Fig. 1 moving downwards.
    DESCRIPTION OF PREFERRED EMBODIMENTS
  • The thread feeding buffer according to the drawing comprises a stand 10 with two vertical guide rods 11. The stand 10 carries an elbow arm 12 with a thread eyelet 13 for a thread 15 which is wound off from a roll 14. The thread can consist of a multiple fibre thread of glass, carbon fibre or synthetic fibre. The thread eyelet 13 provides for a substantially friction free passage of the thread.
  • The thread runs upwards from the roll 14 which is located at ground level, through the thread eyelet 13 and further over a bar 16 which changes the direction of pull back vertically down between the guide rods 11. A thread guide 17 is movably guided by the guide rods and is provided with further thread eyelets 13', through which the thread 15 runs. Then the thread runs on from the thread guide 17 in the direction upwards to a thread guide channel 18, which guides the thread further to a not shown robot arm.
  • A thread brake cooperates with the bar 16 and is composed of a clamp plate 19, which is mounted at the outer end of a pneumatic cylinder 20 which is connected to the stand 10. The clamp plate can be brought in or out of engagement with the bar 16 by operation of the cylinder 20, whereby the feeding of the thread will be stopped.
  • The thread feeding buffer operates in the following way: During normal thread feeding, the pulling of the thread, via the thread eyelets 13, 13' and the bar 16, creates an even resistance in the thread which results in an advantageous even outfeed. If the robot arm is moving in the room, so that more or less thread has to be fed out momentarily, the thread guide 17 will be able to move up and down respectively along the guide rods 11, wherein the thread will receive a rapid compensation in length.
  • If the feeding of the thread is to be stopped, this is made by activation of pneumatic cylinder 20 which then presses the clamp plate 19 against the bar 16. Now the feeding of thread at the end of the robot arm will continue for a short moment while the thread guide 17 moves upwards along the guide rods 11, until the pull in the thread is stopped. When it will be time for restarting the feeding, this will be commenced with a correctly pretensioned thread without the risk of loops or kinks on the thread.
  • A first one of the vertical guide rods 11 of the stand 10 at its lower end is movable by being supported in a direction to and from the opposite vertical guide rod by means of a ball 21 or the like being movable in a transverse groove 22. In normal operation the lower end of the said first vertical guide rod 11 is in its neutral position, as shown in Fig. 1, where the yoke 13' provided with the movable thread guide 17 is moving upwards.
  • A means causing motion of the said movably supported lower end of the first guide rod, preferably a force piston 23 is provided for causing such transverse movement at a rapid downward movement of the yoke a force piston 23 in order to cause that the space between the two vertical guide rods 11 is reduced so much that the yoke 13 with the movable thread guide 17 is clamped in wedge-form and thereby will not make any bounce.
  • The movement of the yoke 13' is preferably monitored by a sensor 24 thus that a rapid downward movement of the yoke 13' makes the sensor emit a signal for activating the force piston 23. This sensor is preferably connected to a central unit 25 receiving a signal from the sensor 24, representing the current speed of the yoke, whereby the signal is compared to a threshold value in said central unit, whereby the central unit is arranged to emit an output activating the force piston 23 when the sensed downward speed of the yoke exceeds said threshold value.
  • The invention is not limited to the above described embodiment, but several variations are possible within the frame of the accompanying claims. For example, the guide rods can be exchanged for other means for controlling a buffer of fibre thread. Further, a spring means can replace the action of gravity upon the thread guide means 17.

Claims (6)

  1. An entangling protection arrangement for a thread feeding buffer for a fibre thread (15) fed from a supply (14) and along a path comprising a first guide (13) for the thread, for receiving the thread from the supply, a contactable brake surface (16) over which the thread is fed from the first guide; a brake element (19) movable into contact with the brake surface for braking movement of the thread past the brake surface; a movable thread guide (17) in the path of the thread past the brake surface, a support (10) comprising two substantially vertically arranged guide rods (11) supporting the movable thread guide for movement; a further guide (13') following the movable thread guide (17) in the path of the thread and past which the thread is drawn; the support enabling the movable thread guide (17) to be moved upwardly by the thread to reduce the length of the thread path between the brake surface and the further thread guide (13') upon the brake element engaging the brake surface and also permitting the movable thread guide (17) to move downward to lengthen the distance between the brake surface and the further thread guide (13') to absorb slack in the thread on the path between the brake surface (16) and the further thread guide (13'),
    characterized therein
    that at least one of said guide rods (11) is provided with means arranged to cause a braking effect on the downward movement of the movable thread guide (17) for preventing entanglement of the thread fed through the movable further guide (13') following a rapid fall of said movable thread guide (17).
  2. An arrangement as claimed in claim 1,
    characterized therein
    that the means arranged to cause a braking effect on the movable thread guide (17) is constituted by a motion path (22) for the lower end of a first one of said vertical guide rods (11), allowing the lower end of that guide rod (11) to rods (11), allowing the lower end of that guide rod (11) to be moved slightly towards the other guide rod, thereby shortening the distance between the two guide rods at the lower ends thereof, and thereby causing a clamping braking effect on said movable thread guide (17) when moving downwards.
  3. An arrangement as claimed in claim 2,
    characterized therein,
    that the motion path for the lower end of the first one of the two vertical guide rods (11) is constituted by a ball rolling track (22).
  4. An arrangement as claimed in claim 2,
    characterized therein,
    that a force piston (23) is provided adjacent the lower end of the first one of said vertical guide rods (11), for enabling that said lower end of the first guide rod being pushed towards the other guide rod for causing a clamping braking effect on said movable thread guide (17).
  5. An arrangement as claimed in claim 4,
    characterized therein,
    that a sensor (24) is provided for sensing a rapid downwards movement of said movable thread guide (17), said sensor being arranged to cause the force piston (23) to make a stroke causing the lower end of the first one of the vertical guide rods (11) to move towards the other guide rod, when the sensor (24) senses a rapid downward movement of the movable thread guide.
  6. An arrangement as claimed in claim 5,
    characterized therein,
    that a central unit (25) is provided, which is adapted to receive a signal representative of the speed of the downward movement of the movable thread guide (17) from the sensor (24), comparing it to a threshold value and giving an output for activating the force piston (23), when the sensed speed exceeds the threshold value.
EP99908053A 1998-03-03 1999-03-03 Entangling protection arrangement for a thread feeding buffer Expired - Lifetime EP1098832B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/033,817 US5988553A (en) 1994-02-02 1998-03-03 Entangling protection arrangement for a thread feeding buffer
US33817 1998-03-03
PCT/SE1999/000309 WO1999044933A1 (en) 1998-03-03 1999-03-03 Entangling protection arrangement for a thread feeding buffer

Publications (2)

Publication Number Publication Date
EP1098832A1 EP1098832A1 (en) 2001-05-16
EP1098832B1 true EP1098832B1 (en) 2003-09-10

Family

ID=21872615

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99908053A Expired - Lifetime EP1098832B1 (en) 1998-03-03 1999-03-03 Entangling protection arrangement for a thread feeding buffer

Country Status (17)

Country Link
EP (1) EP1098832B1 (en)
JP (1) JP4208416B2 (en)
KR (1) KR100585974B1 (en)
CN (1) CN1094884C (en)
AT (1) ATE249388T1 (en)
AU (1) AU741911C (en)
BG (1) BG63660B1 (en)
CA (1) CA2322259C (en)
DE (1) DE69911214T2 (en)
DK (1) DK1098832T3 (en)
EE (1) EE04395B1 (en)
ES (1) ES2207933T3 (en)
HU (1) HU227895B1 (en)
NO (1) NO314449B1 (en)
PT (1) PT1098832E (en)
RU (1) RU2203847C2 (en)
WO (1) WO1999044933A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103879808B (en) * 2014-03-28 2016-06-22 福建闽光电机制造有限公司 A kind of enamel-covered wire unwinding device
CN104085732A (en) * 2014-06-20 2014-10-08 江苏佳成科技股份有限公司 Line storage device on audio line continuous production line
CN106586673B (en) * 2016-12-22 2018-12-28 中宁县鑫杞航农业发展有限公司 A kind of device for pre- take-up
CN108907041B (en) * 2018-06-29 2024-02-06 福建源光电装有限公司 Wire conveying mechanism of binding post cutting press and working method
EP3766814A1 (en) * 2019-07-16 2021-01-20 Komax Holding Ag Cable supply device, cable processing system and method for feeding a cable to a cable processing machine
CN113844952B (en) * 2021-10-13 2023-04-14 安徽顺源智纺有限公司 Yarn feeding device and method for blended yarn textile production line

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1785153C3 (en) * 1968-08-16 1978-06-22 Reiners, Walter, Dr.-Ing., 4050 Moenchengladbach Device for balancing the thread tension on winding devices
DE3336729A1 (en) * 1983-10-08 1985-04-25 Reinking Maschinenbau GmbH, 4993 Rahden Overhead wire drawing-off device
NL8503373A (en) * 1985-12-06 1987-07-01 Endra Bv METHOD AND APPARATUS FOR APPLYING A WIRE, STRAP, FOIL OR OTHER BENDING STRAP ELEMENT TO AN OBJECT OR A RANGE ON OR NEXT TO ITS OBJECTS
EP0356380B1 (en) * 1988-08-25 1994-11-23 Sulzer RàœTi Ag Method to avoid stress peaks in the weft at insertion during braking
JP2883710B2 (en) * 1990-09-28 1999-04-19 津田駒工業株式会社 Package unwinding tension applying device
DE4104087A1 (en) * 1991-02-11 1991-08-29 Dirk Mankowski Electronic wire tension regulator for coil winding device - has successive tensioning braking and dynamic regulation stages
US5139206A (en) * 1991-02-28 1992-08-18 Mechtrix Corporation Wire prefeeder
SE503620C2 (en) * 1994-02-14 1996-07-22 Aplicator System Ab Wire feed buffer for feeding wire

Also Published As

Publication number Publication date
CN1094884C (en) 2002-11-27
NO20004321L (en) 2000-10-25
AU741911C (en) 2002-09-19
NO20004321D0 (en) 2000-08-30
AU741911B2 (en) 2001-12-13
EE04395B1 (en) 2004-12-15
EE200000502A (en) 2002-02-15
HUP0101091A3 (en) 2007-10-29
KR100585974B1 (en) 2006-06-07
ATE249388T1 (en) 2003-09-15
CA2322259A1 (en) 1999-09-10
PT1098832E (en) 2004-02-27
HUP0101091A2 (en) 2001-07-30
HU227895B1 (en) 2012-05-29
KR20010041462A (en) 2001-05-25
RU2203847C2 (en) 2003-05-10
ES2207933T3 (en) 2004-06-01
EP1098832A1 (en) 2001-05-16
DE69911214T2 (en) 2004-07-01
CN1297418A (en) 2001-05-30
AU2756799A (en) 1999-09-20
NO314449B1 (en) 2003-03-24
WO1999044933A1 (en) 1999-09-10
DE69911214D1 (en) 2003-10-16
BG63660B1 (en) 2002-08-30
DK1098832T3 (en) 2004-01-26
JP4208416B2 (en) 2009-01-14
BG104806A (en) 2001-04-30
JP2002505245A (en) 2002-02-19
CA2322259C (en) 2007-06-26

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