PL197209B1 - Weaving loom faller driving system - Google Patents

Abstract

A drive for the needle combs of a weaving loom with a rotating mechanism for forming a shed and beating up the weft, in the form of a magnetoelectric actuator with a cylindrical coil with a winding divided into parts wound in opposite directions and connected in series, surrounding a core containing pole pieces separated by a permanent magnet, characterized in that the winding (3) of the coil (2) consists of three parts, of which the central part is wound in the direction opposite to the winding direction of the outer parts, wherein the coil (2) is surrounded by a ferromagnetic jacket (4) and surrounds a core composed of three pole pieces (5, 6 and 7) in the shape of cylinders made of ferromagnetic material and of two permanent magnets (8 and 9) placed between these pole pieces.

Description

REPUBLIC

POLAND

(12) PATENT DESCRIPTION (19) PL (11) 197209 (13) B1 ( ²¹ ) Application number: 36843 ^{2 51)} Int.Cl.

D03D 49/00 (2006.01)

Patent Office of the Republic of Poland (22) Date of filing: 07/06/2004 (54)

Needle comb drive of a weaving loom

(73) Patent holder: Lodz University of Technology, Lodz, Poland (43) The application was published on: 12/12/2005 BUP 25/05 (72) Inventor(s): Zbigniew Kossowski, Łódź, Poland Kazimierz Kopias, Dobroń, Poland (45) The patent was granted on: 31/03/2008 WUP 03/08 (74) Representative: Zbigniew W. Bałczewski, Invention Center of the Lodz University of Technology

(57) A drive for the needle combs of a weaving loom with a rotating mechanism for forming a shed and beating up the weft, in the form of a magnetoelectric actuator with a cylindrical coil with a winding divided into parts wound in opposite directions and connected in series, surrounding a core containing pole pieces separated by a permanent magnet, characterized in that the winding (3) of the coil (2) consists of three parts, of which the central part is wound in the direction opposite to the winding direction of the outer parts, wherein the coil (2) is surrounded by a ferromagnetic jacket (4) and surrounds a core composed of three pole pieces (5, 6 and 7) in the shape of cylinders made of ferromagnetic material and of two permanent magnets (8 and 9) placed between these pole pieces.

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PL 197 209 B1

Description of the invention

The subject of the invention is a drive for the needle combs of a weaving loom with a rotating mechanism for forming the shed and beating up the weft.

A weaving loom with a rotating shedding and weft-beating mechanism is equipped with needle combs that direct the warp threads into the grooves of the shedding-forming sinkers or into the spaces between these sinkers. To achieve this goal, the needle combs move along the shaft on which the sinkers are mounted, by a distance no greater than the distance between the sinkers. The start and end of the comb movement is synchronized with the instantaneous position of the sinkers rotating with the shaft, and the duration of the comb movement depends on the rotational speed of the main shaft of the loom, i.e., the weaving speed.

Until now, cam mechanisms, which are kinematic chains composed of multiple structural elements, have been used to drive the needle combs. The use of these mechanisms complicates the loom's design and causes energy losses.

Polish patent application No. 339870, in turn, describes a drive system comprising an electromagnet coil whose winding is divided into two parts wound in opposite directions, surrounding a core and surrounded in turn by two rings constituting pole pieces, between which a permanent magnet is placed.

A weaving loom needle comb drive with a rotating mechanism for shedding and weft finishing, in the form of a magnetoelectric actuator with a cylindrical coil with a winding divided into sections wound in opposite directions and connected in series, surrounding a core containing pole pieces separated by a permanent magnet, according to the invention is characterized in that the coil winding consists of three sections, the central section of which is wound in the direction opposite to the winding direction of the outer sections. The coil is surrounded by a ferromagnetic jacket and surrounds a core composed of three cylindrical pole pieces made of ferromagnetic material and two permanent magnets placed between these pole pieces.

The movement of the needle comb is caused by the electromagnetic force generated in the actuator coil.

The drive according to the invention is characterized by simple construction and low electrical energy consumption.

The subject of the invention in an embodiment is shown in the schematic drawing.

The drive is an electromagnetic actuator, the coil 2 of which is a cylindrical carcass with a winding 3 wound on it, divided into three parts connected in series, the turns of which in the middle part are wound in the opposite direction to the winding of the turns of the outer parts. Coil 2 is surrounded by a ferromagnetic jacket 4 and surrounds a core composed of three cylindrical pole pieces 5, 6, and 7 made of ferromagnetic material and permanent magnets 8 and 9 placed between these pole pieces. Coil 2 of the actuator is mounted on a mandrel connected to the needle comb 1.

Electric current flowing through winding 3 of coil 2 generates an electromagnetic force in each of the three sections of the winding, with the vectors of these forces having the same direction. These forces are transferred, via a mandrel, at one end of which coil 2 is mounted, to a needle comb 1 connected to the other end of the mandrel. The beginning and stroke of comb 1 movement are determined by regulating the magnitude and direction of current flow through coil 2.

Claims (1)

Patent claim Drive of the needle bar of a weaving loom with a rotating mechanism for forming the shed and tapping the weft, in the form of a magnetoelectric actuator with a cylindrical coil winding divided into parts wound in opposite directions and connected to each other in series, surrounding the core, containing pole pieces separated by a permanent magnet, characterized in that the winding (3) of the coil (2) consists of three parts, the middle part of which is wound in the opposite direction to the winding of the outer parts, the coil (2) is surrounded by a ferromagnetic sheath (4) and surrounds a core composed of three pole pieces ( 5, 6 and 7) in the shape of cylinders made of ferromagnetic material and two permanent magnets (8 and 9) placed between these pole pieces.