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 PDFInfo
- 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
Links
- 238000009987 spinning Methods 0.000 title claims description 6
- 239000012530 fluid Substances 0.000 claims description 7
- 238000010079 rubber tapping Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 2
- 239000004753 textile Substances 0.000 claims description 2
- 230000011664 signaling Effects 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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)
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)
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)
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 |
-
1987
- 1987-05-08 IT IT20427/87A patent/IT1205005B/it active
-
1988
- 1988-03-30 ES ES198888200602T patent/ES2036663T3/es not_active Expired - Lifetime
- 1988-03-30 DE DE8888200602T patent/DE3875371T2/de not_active Expired - Fee Related
- 1988-03-30 EP EP88200602A patent/EP0290063B1/en not_active Expired - Lifetime
-
1992
- 1992-10-30 GR GR920402448T patent/GR3006121T3/el unknown
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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