Classifications

• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02H—WARPING, BEAMING OR LEASING
  • D02H13/00—Details of machines of the preceding groups
  • D02H13/22—Tensioning devices
  • D02H13/24—Tensioning devices for individual threads
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H49/00—Unwinding or paying-out filamentary material; Supporting, storing or transporting packages from which filamentary material is to be withdrawn or paid-out
  • B65H49/02—Methods or apparatus in which packages do not rotate
  • B65H49/04—Package-supporting devices
  • B65H49/06—Package-supporting devices for a single operative package
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2701/00—Handled material; Storage means
  • B65H2701/30—Handled filamentary material
  • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

• the present invention relates to a device for guiding thread during unwinding from spools or bobbins, i.e., to a set of elements which are adapted to orientate the thread that unwinds from supports or cores in order to assume a new preset direction, both to simply transfer the thread for example from a spool to one or more bobbins and to feed the thread to the weaving loom or to any machine adapted to manufacture fabrics, materials, knitted products, and the like, more briefly referenced to as weaving machine hereinafter.
• the prior art includes supports known as creels for supporting, often rotatably, the spools and/or bobbins in a position which is spaced from the point of use: the core of the spools or bobbins, i.e. , the hollow tubular support whereon the thread is wound, is inserted on a pin or pivot which is rigid or provided with an elastic expandable element to adapt, albeit not adjustably, to the hole of cores having different diameters.
• the thread can unwind transversely, i.e., tangentially with respect to the axis of the spool or bobbin, or longitudinally, around the imaginary continuation of the axis of the spools or bobbins.
• the longitudinal unwinding of the thread allows to reduce the tension variation caused by the decrease in the unwinding diameter: this, however, is achieved along a rather long thread path which sometimes occupies an unacceptable amount of space, over which the thread is subjected to tension variations and to flapping: in any case, it is necessary to adopt auxiliary devices for the elastic tensioning and locking of the thread, such as the so-called thread clamps, distributed downstream of the feeder or accumulation device.
• a principal aim of the present invention is to provide a device adapted to guide single- or multiple-filament thread during its unwinding from the spools in such a direction as to allow the minimum bulk and means for its unwinding and for reaching the weaving machine;
• another first aspect of the same problem is the use of a limited number of means for locking and tensioning the thread, arranging said means compactly and efficiently and so as to have a minimum bulk;
• a further second aspect of the same problem is to continuously feed the weaving machine by passing the feed from one spool to another spool, operator intervention being allowed over a wide time interval prior to the last moment wherein the trailing end of one thread can be tied to the leading part of the next thread;
• a further final aspect of the same problem is to ensure that the cores of the spools have a better elastic support on the pivot or pin about which the thread is unwound by pulling, over a wider range of interchangeability of the spool cores on said pivot or pin.
• the present invention solves the above problem by adopting a thread unwinding path which lies substantially along the axis of the spool but in an opposite direction with respect to the conventional longitudinal unwinding direction, said path being provided by a guide constituted by a tubular through element, which is supported in any manner and is adapted to constitute a rotational support for said core, the thread to be unwound being inserted in said tubular element from its front opening so as to exit from its opposite opening: a thread guiding rod being provided for this purpose, said rod having, in a .front region, a hook for engaging the thread and optionally a rear grip when it is necessary to manually insert said hook into said tubular through element so as to move beyond its opening and pull the thread backwards beyond the exit opening; as regards solving the further first aspect of the problem, means for tensioning and locking the thread being advantageously provided which are supported where said thread exits from said opening upstream of the user; as regards solving the second further aspect related to feeding the weaving machine with spool changing, a guided path of the thread is
• the advantages achieved by the present invention are: simplification of the devices required to unwind the thread from the spools; reduction of the space required for the unwinding of the thread; elimination of thread flapping; elimination of the specifically-provided creels near the weaving machine; accordingly, the spools can be supported directly on the machine, consequently reducing manufacturing, installation and operating costs and bulk; compactness of the thread tensioning and locking means; more uniform tension of the thread; more practical thread locking for the operator and better position and use of the operator during spool changing; higher productivity; the possibility to perform fine adjustment of the support for the spool core and to provide a wider interchangeability range both in case of fixed coupling and in case of rotary coupling between the spool core and the supporting pivot or pin.
• figure 1 is a partial side view of a support advantageously belonging to the weaving machine and provided with spools or bobbins of thread which have, for example, a cylindrical or frustum shape and are arranged for example horizontally;
• figure 2 is a partial enlarged-scale and partially sectional view of figure 1;
• figure 2a is a side view of an extractor or thread guide adapted to engage the end of a portion of thread freshly unwound from the bobbin in order to insert it in the front end of a tubular element which constitutes a support for the corresponding spool and to extract it from the rear end of the tubular element;
• figure 3 is a partial plan view of figure 1;
• figure 4 is a partial left view of figure 1;
• figure 5 is a partial view of figure 1, wherein the spools are arranged in a vertical alignment merely by way of example;
• figure 6 is a partial partial view of figure 1, wherein the spools are arranged in a vertical alignment merely by way of
• the reference numeral 1 designates a framework supporting sleeves 2, i.e., tubular elements advantageously provided with a cylindrical axial hole 2a which are fixed for example to the framework by means of nuts 3;
• the reference numeral 4 designates a retention means, for example a ring, adapted to provide an abutment which is axially adjustable, for example by means of a threaded coupling on the sleeve 2 through an elastic means 5, for example a helical spring, which acts against a pusher disk 6 provided, in a front region, with a groove 7 to accommodate, in the groove, the rear ends of a set of elastic laminae 8 which are arranged circumf erentially with respect to the sleeve 2 in a convex configuration and the opposite end whereof is correspondingly inserted in a groove 9 wherewith a front collar 10 is provided, the collar being coaxial to sleeve 2 and resting on an abutment element 11 which is fixed on the sleeve 2; the assembly constitute
• the tubular element or sleeve 2 can also be rotatably coupled to the support 1, instead of being fixed thereto, and act as a pivot or pin if the thread unwinds tangentially with respect to the spool.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Looms (AREA)
• Multiple-Way Valves (AREA)
• Mechanically-Actuated Valves (AREA)
• Media Introduction/Drainage Providing Device (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=11386090

Family Applications (1)

Country Status (5)

Cited By (1)

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• 1996
  • 1996-05-17 IT IT96MO000061 patent/IT1287432B1/it active IP Right Grant
• 1997
  • 1997-05-02 EP EP97922022A patent/EP0843642B1/de not_active Expired - Lifetime
  • 1997-05-02 AU AU27874/97A patent/AU2787497A/en not_active Abandoned
  • 1997-05-02 DE DE69714550T patent/DE69714550D1/de not_active Expired - Lifetime
  • 1997-05-02 WO PCT/IT1997/000100 patent/WO1997044271A1/en active IP Right Grant

Non-Patent Citations (1)

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