EP0290063B1 - Picking element for carrying out the operation of bobbin doffing and the operation of introduction of the empty tube on a spinning frame - Google Patents

Picking element for carrying out the operation of bobbin doffing and the operation of introduction of the empty tube on a spinning frame Download PDF

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Publication number
EP0290063B1
EP0290063B1 EP88200602A EP88200602A EP0290063B1 EP 0290063 B1 EP0290063 B1 EP 0290063B1 EP 88200602 A EP88200602 A EP 88200602A EP 88200602 A EP88200602 A EP 88200602A EP 0290063 B1 EP0290063 B1 EP 0290063B1
Authority
EP
European Patent Office
Prior art keywords
picking element
picking
doffing
pin
sleeve portion
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
EP88200602A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0290063A1 (en
Inventor
Sandro Sartoni
Mario Fontana
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.)
Savio SpA
Savio Macchine Tessili SpA
Original Assignee
Savio SpA
Savio Macchine Tessili SpA
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 Savio SpA, Savio Macchine Tessili SpA filed Critical Savio SpA
Publication of EP0290063A1 publication Critical patent/EP0290063A1/en
Application granted granted Critical
Publication of EP0290063B1 publication Critical patent/EP0290063B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
    • D01H9/001—Bobbin-taking arrangements

Definitions

  • the present invention relates to a gripping device for the automatic doffing of bobbins and replacing of empty tubes on a textile machine, preferably a spinning frame.
  • Devices for carrying out the operation of bobbin doffing and the operation of placing empty winding tubes on spindles are provided with picking elements for gripping and handling the empty tubes or the tubes filled with wound thread.
  • picking elements are mounted on a longitudinal beam, in a cantilever fashion, to which beam the necessary movement is supplied, for simultaneously picking all the complete bobbins from the spindles, and, according to a suitable sequence, for simultaneously positioning all the empty tubes on the spindles.
  • Picking elements are known, which are based on the use of bushes containing elastically yielding inner sleeves which, under the action of a pressurized fluid, are inflated in order to be able to grip the full bobbins, or the empty tubes.
  • the picking elements destined to the automatic doffing of all the full bobbins, and those destined to the re-charge of all the empty tubes of the whole spinning bed are generally separated from one another, and are provided with well-distinct drive means.
  • picking elements are known.
  • a structural type of picking elements for empty tubes, or tubes filled with thread is disclosed in detail in US-A-3,367,098.
  • the picking element has a pin shape, and has an elastic-bellows body having the shape of a bag which presses, after being inflated, against the inner wall of the tube to be gripped, and in such a way grips and moves it.
  • This type of picking element makes some drawbacks arise, which limit its application.
  • the inclination is such that, as the movements for the automatic doffing operation proceed, the empty tube, or the tube filled with thread beats against parts of the machine, which damage it, and, in extreme cases, also a damage may occur to the picking element, or to corresponding machine parts against which the same tube comes to interfere.
  • the purpose of the present invention is to render only one the picking element destined to grip the tubes and the bobbins (i.e., those tubes on which desired amounts of thread have been wound) and, furthermore, to considerably simplify the manufacturing operations thereof.
  • a gripping device having a picking element capable of gripping both empty tubes and complete bobbins is further known from GB-A-2 118 523.
  • This device comprises a single picking element for each gripping station and has the features of the preamble of claim 1.
  • Both the sleeve portion of the picking element and the elastically yielding sleeve member have a bell-shaped configuration, and they are both fastened at their top portion to the doffing beam by means of a screw screwed into the body of the beam, the screw thus extending coaxially to the picking element and the tube or bobbin to be gripped thereby.
  • this known picking element is made of a relatively high number of mutually assembled components, and this increases the manufacturing costs.
  • the purpose of the present invention is to provide a picking element with a considerably reduced cost and which reacts and triggers a safety action when the movement which the picking element is expected to carry out is hindered during the change in position of the empty tube, or of the tube filled with wound thread.
  • Each action of detaching of the picking element from the longitudinal support beam may be simultaneously signalized by an optical or acoustical signal, so that the attention of the attending staff is drawn onto the operative malfunctioning, and the attending staff may eliminate it with no delay, in order to restore the optimum conditions for carrying out the whole automatic doffing operation.
  • the safety element may advantageously have the structure of a self-tapping screw, which connects the longitudinal support beam with a pin suitably housed in a hole of the picking element.
  • Said pin is provided, through its middle, with a smooth bore, which is self-tapped under the action of the self-tapping screw.
  • the self-thread generated by the screw in the pin is in fact the actual safety element, in that it results to have a limited, preset, strength, on a value preset during the design step.
  • the handling integrity is restored by simply replacing the pin provided with said smooth bore, which gets self-tapped during the action of screw connection, as above disclosed. Incidentally, the functionality of the picking element is restored without it having to be replaced.
  • a picking element 1 has a rigid sleeve portion 2 (e.g., of a plastics material) housing an elastically yielding sleeve member 10 secured at its opposite ends to the sleeve portion 2.
  • the picking element 1 is a single-piece element further having a bracket portion 2a extending generally radially to the sleeve portion 2 for cantilever supporting the picking element 1 by a longitudinal doffing beam 4, supporting all the picking elements 1 of the whole operating bed, which associates the spinning spindles in an approached position side-by-side to each other.
  • a ring space 5 suitable for introducing a compressed fluid for inflating the elastically yielding sleeve member 10 surrounds the sleeve member 10 in the sleeve portion 2.
  • a rigid ring 6 serves for positioning the bottom lip of the elastical sleeve member 10 for the single high-pressure mould-casting operation during which the picking element 1 is manufactured.
  • a channel 8 places the ring space 5 in fluid communication with a central feed duct 9 of the beam 4, so that a compressed fluid supplied to the duct 9 feeds all the picking elements 1 of the whole operating bed through the respective channels 8.
  • the compressed fluid causes the elastically yielding inner sleeve member 10 to be inflated in order to grip the top end portion of an empty tube, or of a tube filled with the wound thread (i.e. a bobbin).
  • the sleeve portion 2 has two wings 12 integral therewith, which have the shape of two circular sectors forming a divergent funnel extending downwards for inviting and guiding the picking element 1 on the outer portion of the top end of the tube or bobbin to be handled during the automatic doffing operating cycle.
  • a safety element in form of a pin 14 is interposed between the bracket portion 2a and a fastening means in form of a screw 16 securing the picking element to the doffing beam 4.
  • the pin 14 is housed in a hole 3 of the bracket portion 2a.
  • the hole 3 extends perpendicularly to the axis of the sleeve portion 2a of the picking element 1.
  • the pin 14 is further provided, substantially through its middle, with a smooth bore wherein the screw 16, which is a self-tapping screw, is screwed, so generating a screw-thread inside the bore of the pin 14 and binding the picking element 1 to the beam 4.
  • the automatic doffing device is positioned in such a way that the beam 4 positions the picking element 1 around the portions close to the top end of said either empty or thread-filled tube, and electrovalves, or similar means are then operated, which deliver compressed air to the main duct 9. Then, through the communication channel 8, compressed air is fed to the ring space 5, which causes the deformation of the elastically yielding member 10 to occur, causing the empty tube, or the tube filled with wound thread, to be gripped thereby.
  • the subsequent handling causes either the doffing of the tube filled with wound thread from the spinning spindle, or the bringing of the empty tube in place of the already removed tube filled with wound thread, the whole according to a precise sequence of operating steps known from the prior art.
  • the calibrated strength connection formed by the pin 14 in which the screw 16 is self-tapped causes the picking element 1 to get detached from the beam 4, whereas the beam itself can continue its operating movement with all the other picking elements 1 fastened thereto and without that parts of the machine or of the doffing device and picking element other than the pin 14 are damaged.
  • the pin 14 can subsequently be easily replaced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
EP88200602A 1987-05-08 1988-03-30 Picking element for carrying out the operation of bobbin doffing and the operation of introduction of the empty tube on a spinning frame Expired - Lifetime EP0290063B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2042787 1987-05-08
IT20427/87A IT1205005B (it) 1987-05-08 1987-05-08 Elemento di presa per effettuare l'operazione di levata della bobina e quella d'introduzione del tubetto vuoto in una macchina di filatura

Publications (2)

Publication Number Publication Date
EP0290063A1 EP0290063A1 (en) 1988-11-09
EP0290063B1 true EP0290063B1 (en) 1992-10-21

Family

ID=11166788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88200602A Expired - Lifetime EP0290063B1 (en) 1987-05-08 1988-03-30 Picking element for carrying out the operation of bobbin doffing and the operation of introduction of the empty tube on a spinning frame

Country Status (5)

Country Link
EP (1) EP0290063B1 (it)
DE (1) DE3875371T2 (it)
ES (1) ES2036663T3 (it)
GR (1) GR3006121T3 (it)
IT (1) IT1205005B (it)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1249023B (it) * 1990-06-29 1995-02-11 Savio Spa Dispositivo per il caricamento di tubetti orientati in sequenza al nastro di levata di un filatoio
US5289674A (en) * 1990-06-29 1994-03-01 Savio Winding machine with an in-line package preparer, and an improved spinning-winding method
IT1249025B (it) * 1990-06-29 1995-02-11 Savio Spa Dispositivo per il caricamento sequenziale di tubetti orientabili ad un filatoio
DE4117730A1 (de) * 1991-05-30 1992-12-03 Zinser Textilmaschinen Gmbh Verfahren zum abziehen von spulen und zum aufstecken von spulenhuelsen an spindeln einer maschinenseite einer spinn- oder zwirnmaschine und vorrichtung zur durchfuehrung des verfahrens
CN113896048B (zh) * 2021-12-10 2022-02-08 新沂利业织造有限公司 一种圆锥纱筒自动化抓取装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2309754A1 (de) * 1972-03-16 1973-09-27 Nuova San Giorgio Spa Greifvorrichtung fuer das abnehmen der vollen spulen und das wiedereinsetzen der leeren huelsen in einer spinnmaschine
FR2466534A1 (fr) * 1979-09-28 1981-04-10 Alsacienne Constr Meca Dispositif de prehension de supports de files sur machines textiles a broches rotatives
DE3214128C2 (de) * 1982-04-16 1984-11-15 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Pneumatischer Greifer

Also Published As

Publication number Publication date
GR3006121T3 (it) 1993-06-21
ES2036663T3 (es) 1993-06-01
EP0290063A1 (en) 1988-11-09
IT1205005B (it) 1989-03-10
DE3875371D1 (de) 1992-11-26
DE3875371T2 (de) 1993-04-08
IT8720427A0 (it) 1987-05-08

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