EP1473392A2 - Webmaschine mit verringerter Lärmentwicklung - Google Patents

Webmaschine mit verringerter Lärmentwicklung Download PDF

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Publication number
EP1473392A2
EP1473392A2 EP04101799A EP04101799A EP1473392A2 EP 1473392 A2 EP1473392 A2 EP 1473392A2 EP 04101799 A EP04101799 A EP 04101799A EP 04101799 A EP04101799 A EP 04101799A EP 1473392 A2 EP1473392 A2 EP 1473392A2
Authority
EP
European Patent Office
Prior art keywords
noise
loom
cover
weaving loom
absorbing
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.)
Withdrawn
Application number
EP04101799A
Other languages
English (en)
French (fr)
Other versions
EP1473392A3 (de
Inventor
Matteo Mutti
Boris Nettuno
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.)
Promatech SpA
Original Assignee
Promatech 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 Promatech SpA filed Critical Promatech SpA
Publication of EP1473392A2 publication Critical patent/EP1473392A2/de
Publication of EP1473392A3 publication Critical patent/EP1473392A3/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/02—Construction of loom framework
    • D03D49/027—Arrangements or means for noise reduction
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/02—Construction of loom framework
    • D03D49/022—Protective hoods or curtains

Definitions

  • the present invention relates to a weaving loom equipped with means capable of lowering the noise level of the loom itself during the operation thereof.
  • Weaving looms are machines which, due to the nature and type of movement of the mechanical elements and devices they consist of, and to the high working speed accomplished today, are characterised by extremely high noise levels.
  • the noise level (sound pressure) remains in any case extremely high, for example between 90 and 100 dB.
  • the operators working in weaving rooms constantly wear personal ear protection equipment, but even uttering short pieces of information between operators is made difficult.
  • the heald frames are rectangular frames within which are hooked a plurality of thin rod-like elements, the healds, each one housing a warp yarn in a central eye thereof.
  • the rapid alternate movement of the healds allows the continuous shed formation among the warp yarns to insert the weft threads, all according to a preset programme which determines the kind of weave between weft threads and warp yarns and hence the final pattern of the fabric.
  • the healds have a certain slack with respect of the heald frames to which they are connected, so that the rapid alternate movement of the latter ones determines a continuous beating of the healds onto the respective supports and consequently a high level of noise.
  • Another object of the present invention is to provide a device of the type described above which does not interfere with the normal weaving activities of the loom, therefore allowing full accessibility to any part thereof for ordinary maintenance activities, as well as for any repairs of the warp yarns or weft threads that may need to be carried out by the operator.
  • a weaving loom of the type comprising devices for forming the shed among the warp yarns, devices for inserting the weft into the shed, and an oscillating reed for beating the new wefts against the fabric being woven, characterised in that it comprises a noise-absorbing cover encasing the top side and, at least in part, the lateral sides of said shed-forming devices and the reed, and in that said cover is provided with control means apt to shift said cover from a working position - wherein it is close to the warp yarns and to the fabric being woven - to an access position, wherein it is far from all the above-said fabric-weaving devices to allow the operator to have free access thereto.
  • fig. 1 is a diagrammatic axonometric top view of a loom comprising a noise-absorbing cover according to the present invention, in a lowered working position;
  • fig. 2 is a front diagrammatic view of the loom of fig. 1;
  • fig. 3 is a lateral diagrammatic view of the weft-inserting side of the loom of fig. 1, wherein the raised position of the cover providing access to the weaving devices is also shown by a broken line;
  • fig. 4 is a diagrammatic lateral view of the weft-receiving side of the loom of fig. 1, wherein the raised position of the cover is also shown by a broken line;
  • fig. 5 is a cross-section view of the loom of fig. 1, along the line V-V of fig. 2.
  • the reduced-noise loom comprises a noise-absorbing cover 1 extending to cover only the shed-forming and the weft-inserting area, i.e. the area wherein all the alternate-movement members of the loom are concentrated that are responsible, more than others, for noise production, for the reasons already mentioned before.
  • the cover 1 is formed as a cylindrical element with a substantially U-shaped section, the wings of the U-shaped section ending with a rear edge 1p immediately upstream of the heald-carrying frame assembly Q and, respectively, with a front edge 1a immediately downstream of reed P.
  • the noise-absorbing cover 1 is located - in its working position, shown by a continuous line - in such a way that its rear edge 1p is very close to the warp yarns O and its front edge is very close to the fabric being woven, without causing the cover to be in contact with any loom member, to avoid resonance or vibration transmission.
  • Small plates 2 and 3 close the noise-absorbing cover 1 laterally as far as possible, loom operation permitting; thus, in the case of an air jet loom, the small plate 2 on the weft-inserting side has an opening only sufficient for the movement of the weft-presenting device carrying the wefts in front of the main launching jet, whereas the small plate 3, on the weft-receiving side, completely closes the noise-absorbing cover 1.
  • the small plates 2 and 3 must instead be provided with openings large enough to allow the grippers themselves to travel through, as shown in the drawings or, alternatively, have such a design as to also cover, as far as possible, the stand-by area of the gripper outside the fabric being woven.
  • Supporting and moving the noise-absorbing cover 1 - between a working position and a position allowing the operator to gain access to the parts shielded by said cover - are effectively performed by two fluidodynamic cylinder-piston assemblies 4, placed near the two lateral ends of the noise-absorbing cover 1, the base of the cylinder 4c and the top of the piston 4p of each cylinder-piston assembly 4 being fixed to the loom structure and, respectively, to the noise-absorbing cover 1.
  • the latter connection is performed by extension brackets, so as to allow the noise-absorbing cover a wide travel. Fixing of the pistons 4p to said cover occurs in a barycentric position of the cover itself, so that during the movement of the pistons there is no travel torque, and the lifting and lowering of the cover occurs smoothly.
  • the noise-absorbing cover 1 is easily and swiftly translated from its normal working position, shown in the drawings by continuous lines, to the position of access by the operator, shown by broken lines in figg. 2 and 3. In this position the noise-absorbing cover 1 is well above the loom plane and does therefore not hamper the operator (apart from the negligible obstacle represented by the cylinders 4c) to carry out the usual maintenance or repair operations of the loom.
  • the controls of the cylinder-piston assemblies 4 provide, in addition to a manual control, also an automatic control causing the lifting of the cover 1 every time the loom stops and the lowering of the same cover when the loom resumes its function, so that the presence of the noise-absorbing cover 1 is substantially not even noticed by the operator.
  • the operator is alerted by a loom stop signal to perform a maintenance or repair operation, he already finds the noise-absorbing cover 1 in the access position shown in figg. 2 and 3 by a broken line.
  • the cover thus comprises an outer shell 5, consisting of a composite sandwich-like panel formed by two outer aluminium alloy sheets, for example of the type marketed under the brand PERALUMAN-100, between which is inserted a black, LDPE-type polyethylene core.
  • a composite panel of this type is available on the market under the brand name DIBOND, manufactured by Alusuisse Singen GmbH, and displays excellent structural and lightness features, thanks to the double aluminium alloy wall, together with pronounced noise-absorbing properties, due to the polyethylene core.
  • an inner lining 7 made of noise-absorbing material, preferably a melamine-based, foamed plastic material; a suitable material is for example foamed melamine marketed under the brand name FONITEK, manufactured by the SOGIMI Group; plates of this material having a thickness of 20 mm are sufficient for the purposes of the invention.
  • the noise-absorbing cover device described above fully achieves all the objects of the present invention.
  • a remarkable reduction of noise levels was observed, averaging from about 106-107 dB down to about 101 dB, with no appreciable reduction of accessibility to the loom by the operator, thanks to the swiftness and simplicity of the operations of opening and closing the noise-absorbing cover 1 and to the easy automation of the same.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
EP04101799A 2003-04-29 2004-04-28 Webmaschine mit verringerter Lärmentwicklung Withdrawn EP1473392A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20030859 ITMI20030859A1 (it) 2003-04-29 2003-04-29 Telaio tessile a ridotta rumorosita'
ITMI20030859 2003-04-29

Publications (2)

Publication Number Publication Date
EP1473392A2 true EP1473392A2 (de) 2004-11-03
EP1473392A3 EP1473392A3 (de) 2005-11-16

Family

ID=32983214

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04101799A Withdrawn EP1473392A3 (de) 2003-04-29 2004-04-28 Webmaschine mit verringerter Lärmentwicklung

Country Status (2)

Country Link
EP (1) EP1473392A3 (de)
IT (1) ITMI20030859A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5904688A (en) * 1997-12-30 1999-05-18 Bristol-Myers Squibb Co. Orthopaedic assembly including an acetabular cup and cup inserter
EP1614786A2 (de) * 2004-07-08 2006-01-11 Tsudakoma Kogyo Kabushiki Kaisha Schalldämpfende Vorrichtung für eine Webmaschine
CN110607596A (zh) * 2019-08-22 2019-12-24 南安富诚阁工业设计有限公司 一种利用气流自动清除毛絮的纺织机

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3633706A (en) * 1970-08-03 1972-01-11 Richen Co Inc The Noise suppression assembly
US3773140A (en) * 1972-05-30 1973-11-20 Continental Can Co Noise attenuating kit
US3948296A (en) * 1972-06-30 1976-04-06 Grob & Co. Aktiengesellschaft Frame stave for heald frame of weaving machine
US4237941A (en) * 1977-04-21 1980-12-09 Sulzer Brothers Limited Loom with cover arrangement
US4365650A (en) * 1979-10-09 1982-12-28 Lindauer Dornier Gesellschaft Mbh. Weaving machine with a protective covering
US5738150A (en) * 1994-06-15 1998-04-14 Picanol N.V. Weaving machine cover
US5947162A (en) * 1995-06-02 1999-09-07 Sulzer Rueti Ag Series shed weaving machine with a weaving rotor
FR2790012A1 (fr) * 1999-02-24 2000-08-25 Icbt Diederichs Sa Metier a tisser

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3633706A (en) * 1970-08-03 1972-01-11 Richen Co Inc The Noise suppression assembly
US3773140A (en) * 1972-05-30 1973-11-20 Continental Can Co Noise attenuating kit
US3948296A (en) * 1972-06-30 1976-04-06 Grob & Co. Aktiengesellschaft Frame stave for heald frame of weaving machine
US4237941A (en) * 1977-04-21 1980-12-09 Sulzer Brothers Limited Loom with cover arrangement
US4365650A (en) * 1979-10-09 1982-12-28 Lindauer Dornier Gesellschaft Mbh. Weaving machine with a protective covering
US5738150A (en) * 1994-06-15 1998-04-14 Picanol N.V. Weaving machine cover
US5947162A (en) * 1995-06-02 1999-09-07 Sulzer Rueti Ag Series shed weaving machine with a weaving rotor
FR2790012A1 (fr) * 1999-02-24 2000-08-25 Icbt Diederichs Sa Metier a tisser

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5904688A (en) * 1997-12-30 1999-05-18 Bristol-Myers Squibb Co. Orthopaedic assembly including an acetabular cup and cup inserter
EP1614786A2 (de) * 2004-07-08 2006-01-11 Tsudakoma Kogyo Kabushiki Kaisha Schalldämpfende Vorrichtung für eine Webmaschine
EP1614786A3 (de) * 2004-07-08 2006-08-30 Tsudakoma Kogyo Kabushiki Kaisha Schalldämpfende Vorrichtung für eine Webmaschine
CN110607596A (zh) * 2019-08-22 2019-12-24 南安富诚阁工业设计有限公司 一种利用气流自动清除毛絮的纺织机

Also Published As

Publication number Publication date
EP1473392A3 (de) 2005-11-16
ITMI20030859A1 (it) 2004-10-30

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