EP2580587A1

EP2580587A1 - Device for determining features of a yarn

Info

Publication number: EP2580587A1
Application number: EP11731237.1A
Authority: EP
Inventors: Norbert Ziganek; Martin Kuster
Original assignee: Uster Technologies AG
Current assignee: Uster Technologies AG
Priority date: 2010-06-09
Filing date: 2011-06-01
Publication date: 2013-04-17
Also published as: CN203894175U; CN203890777U; CH703267A1; CN203894229U; EP2787344A1; WO2011153649A1; JP2013532237A; CN203894230U; US20130068010A1; CN203894228U; CN203337655U; WO2011153649A4

Abstract

The invention relates to a device for determining features, in particular the hairiness, of a yarn, comprising a housing (2) and a sensor unit attached in or on the housing (2) for measuring at least one parameter of the yarn. The housing (2) substantially consists of a front plate (22), a rear plate (23) and a frame (21) located between the front plate (22) and the rear plate (23). The frame (21) is produced integrally and separately from the front plate (22) and the rear plate (23), for example from a bent metal sheet. The front plate (22) and the rear plate (23) are designed as flat plates and fastened, by means of screw connections, to lugs (24) which are bent inward on the frame (21). The housing (2) thus has a particularly simple design.

Description

DEVICE FOR DETERMINING CHARACTERISTICS OF A YARN

AREA OF EXPERTISE

The present invention is in the field of quality control in the textile laboratory. It relates to a device for determining characteristics, in particular the hairiness, of a yarn, according to the preambles of the independent claims. Such devices are typically used in a textile laboratory.

STATE OF THE ART

In staple yarns spun from many fibers, individual fibers are not fully integrated into the actual package. They partially protrude from the

Gamkörper out what is called hairiness of the yarn. The hairiness is an important yarn property, which is why the textile industry has a great interest in their reliable and reproducible measurement and classification. Devices for determining the hairiness of yarns are known, such. B. the device USTER ^® ZWEIGLE HAIRINESS TESTER 5 of the Applicant, the z. In the

Application Manual "USTER ^® TWIN HAIRINESS TESTER 5 Application

Handbook "., V1.0, September 2009, describes or device USTER ^® TESTER 5-S800 of the applicant, which, for example, in the brochure" USTER ^® TESTER 5-S800 Brilliant Testing - Superior Analysis ", August 2007, is described. Also the writings

EP-0'271'728 A2, EP-1'621'872 A2, DE-198'18'069 AI and DE-199'24'840 AI disclose hairiness measuring devices.

US 3,566,194 A describes an electrical distribution manifold with a particularly flat housing. The four housing walls are provided with inwardly bent tabs on which a front panel is attached. EP-0'266'612 A2 discloses a yarn tester with two adjacent ones

Transport rollers for conveying the yarn to be tested. In test mode presses

Bearing arm of a transport roller on a safety switch. As soon as the bearing arm with the transport roller is swung away, the safety switch switches the

Drive motors of the transport rollers from.

US-4,213,056 A discloses an apparatus for testing intertwined

Multifilament yarns. The device includes an optical sensor unit in which a contact body is located. The multifilament yarn to be tested is passed over the contact body at a predetermined contact pressure and thereby optically scanned. To introduce the multifilament yarn such that it wraps around the

Contact body is guided, a curved insertion slot is provided in the bottom and top plate of the sensor unit.

PRESENTATION OF THE INVENTION

It is an object of the present invention to provide the known devices for

Determination of characteristics of a yarn on various aspects to further improve.

These and other objects are achieved by the device according to the invention as defined in the independent patent claims. Advantageous embodiments are given in the dependent claims.

In a first embodiment, the device according to the invention for determining characteristics of a yarn comprises a housing and a sensor device mounted in or on the housing for measuring at least one parameter of the yarn. The housing essentially consists of a front plate, a back plate and a frame lying between the front plate and the back plate. The frame is made in one piece and separately from the front panel and the rear panel. The frame is preferably made of a bent metal sheet. The front panel and the

Back plate can be formed as a flat plates and screw connections Lugs, which are bent inwards on the frame, be fastened. In this first

Embodiment, the housing has a particularly simple structure.

In a second embodiment, the device according to the invention for determining characteristics of a yarn comprises a housing with a front plate substantially perpendicular to a support, a sensor device mounted in or on the housing for measuring at least one parameter of the yarn and further components. The front plate of the housing serves as a carrier element for the

Sensor device and several other components. In a preferred embodiment, the plurality of further components are selected from the set including the following elements: yarn guide guides, a sensor cover for the yarn guide

Sensor device, an electronic circuit for controlling parts of the device and / or for evaluating signals of the sensor device, a yarn conveying device, a roller cover for the yarn conveying device, a drive device for

Driving the Garnfördereinrichtung, a control of the drive means, a traversing device, a Garnabsaugeinrichtung and a pressure cylinder for a Garnförderrolle. The sensor device and the several other components can be attached directly to the front panel and / or indirectly to angle profiles, which in turn are attached to the front panel. This second embodiment also contributes to a simple, clear construction of the device and its simple

Maintainability at.

In a third embodiment, the device according to the invention for determining characteristics of a yarn includes a sensor device for measuring at least one parameter of the yarn and a sensor cover for protecting the sensor device. The sensor cover has a measuring gap through which the yarn in its

Can be moved longitudinally, as well as an insertion slot through which the yarn is inserted into the measuring gap, on. The projection of the insertion slot in a plane perpendicular to the longitudinal direction is curved. In a preferred embodiment, the sensor device is an optoelectronic sensor device, and the insertion slot is curved in such a way that light does not pass directly from outside onto the yarn and / or onto a photosensitive element of the sensor device, and / or that emitted by a light-emitting element of the sensor device Light not directly and / or over the yarn to the outside. As a result, on the one hand, the optoelectronic

Sensor device as well as possible shaded by unwanted extraneous light and improves the measurement signal. On the other hand, the work safety is increased because people in the surroundings of the device can not be injured by leaking light. The term "light" in this document means not only the visible range (VIS) of the electromagnetic spectrum, but also the adjacent ultraviolet (UV) and infrared (IR) ranges.

In a fourth embodiment, the device according to the invention for determining characteristics of a yarn includes a sensor device for measuring at least one parameter of the yarn and a yarn conveying device for conveying the yarn through the sensor device. The yarn delivery device is designed as a roller delivery plant with two co-acting conveyor rollers. Axes of the conveyor rollers are parallel to each other and have a variable distance from each other, and at least one of the conveyor rollers is driven. The device further includes an end position sensor or limit switch which interrupts the drive of the driven conveyor roller when the distance between the two axes has exceeded a predetermined threshold. This fourth embodiment thus provides effective protection against unwanted winding and pinching of fingers, hair, clothing or jewelry.

In a fifth embodiment, the device according to the invention for determining characteristics of a yarn comprises a sensor device for measuring at least one parameter of the yarn and a yarn conveying device for conveying the yarn through the sensor device. The yarn conveying device is designed as a roller supply unit with two co-acting conveyor rollers, wherein axes of the conveyor rollers are parallel to each other. The apparatus further includes a traversing device, which changes the position of the yarn in the direction of the axes of the conveying rollers in time in the area of the yarn conveying device during yarn feeding. For this purpose, the

Traversing means comprise a trained as Gamführungsöse traversing element which is movable in the direction of the axes of the conveyor rollers back and forth, for example. By a pneumatic traversing cylinder. With this fifth embodiment, the Coating surfaces of the conveyor rollers in the axial direction evenly, instead of only one position claimed, which increases their service life.

In a sixth embodiment, the device according to the invention for determining characteristics of a yarn includes a sensor device for measuring at least one parameter of the yarn and a yarn conveying device for conveying the yarn through the sensor device. The Garnfordereinrichtung is designed as a roller delivery with two co-operating conveyor rollers, wherein at least one of the conveyor rollers can be driven by a drive device. The at least one drivable conveyor roller can be driven directly by the drive device. This in turn makes the device simple and inexpensive. Between the drive device and the at least one drivable conveyor roller, a flexible coupling can be attached, which is preferably designed as a spiral coupling or bellows coupling. This ensures a uniform yarn run.

The above-described embodiments may be arbitrarily combined with each other. Such combinations result in further, particularly advantageous embodiments. The device according to the invention can be used to determine various characteristics of a yarn. It may be suitable for determining only a single feature or a plurality of different features. A particularly advantageous use of the inventive device consists in the

Optoelectronic measurement of the hairiness of the yarn.

TITLE OF DRAWINGS

Hereinafter, various aspects of the invention will be explained in detail with reference to the drawings.

FIG. 1 shows a device according to the invention in a perspective view. Figure 2 shows the structure of a housing of the inventive device. FIG. 3 shows a front plate of the device (a) according to the invention in one

Front view and (b) in a rear view.

FIG. 4 shows a sensor cover of the device according to the invention in one

perspective view.

Figure 5 show conveyor rollers and a traversing device of the inventive

Device in perspective views (a) from above and (b) from the side. FIG. 6 shows a coupling for the yarn drive of the device according to the invention in a side view.

EMBODIMENT OF THE INVENTION

FIG. 1 shows, from the outside, a device 1 according to the invention for determining characteristics of a yarn 9. In this illustration, one recognizes a substantially parallelepiped-shaped housing 2, different yarn guide elements 31 - 34 for guiding the yarn 9, a sensor cover 49 for a yarn sensor device 4 and one

Roller cover 59 for a yarn conveying device 5. The yarn sensor device 4 measures at least one parameter of the yarn 9, z. As the length of fibers ("hair"), which protrude from the yarn 9.

In Figure 2, the particularly simple construction of the housing 2 of the device 1 is shown. The housing 2 consists essentially of a frame 21, a front plate 22 and a back plate 23. The frame 21 is made in one piece, preferably by bending a metal sheet and welding it together at the ends, so that in

Essentially a lateral surface of a cuboid arises. For the frame 21 z. B. about 2 mm thick steel sheet can be used. The front plate 22 and the rear plate 23 are each formed as a flat metal plates. You can z. B. from about 2-16 mm thick steel or aluminum. The attachment of the front plate 22 and the back plate 23 on the frame 21 can be done by means of screw on tabs 24 which are bent inwardly on the frame 21.

Figure 3 shows the front panel 22 (a) in a front view and (b) in a rear view. The front plate 22 serves as a carrier element for as many components of the device. 1 In the example of FIG. 3, the front panel 22 carries on its front side (FIG. 3 (a)) the sensor cover 49, the sensor device 4 (covered by the sensor cover 49 and partly visible in FIG. 3 (b)) which, for example, has a light transmitter 41 and a light receiver 42, the roller cover 59, which (from the

Roller cover 59 covered) Gamfördereinrichtung 5 and the yarn guide elements 31-34. On the back (Fig. 3 (b)) of the front panel 22 are z. Example, a circuit board 43 with an electronic circuit for controlling parts of the device 1 and / or evaluation of the sensor signals, a drive control 61, a traversing cylinder 73, a drive device 6, a Garnabsaugeinrichtung 37 and a pressure cylinder 56 for a pressure roller 52 (see. Fig. 5). These and / or other components can be attached directly to the front panel 22 or indirectly to angle sections 25 which in turn are attached to the front panel 22.

The sensor cover 49 of the device 1 is shown in FIG. The

Sensor cover 49 protects the sensor device 4 of the device 1 (see FIG. 1) from mechanical influences, from contamination and, in the case of an optoelectronic sensor device 4, from extraneous light. In the latter case, the sensor cover 49 in the spectral range in which the optoelectronic sensor device 4 is photosensitive, opaque. The sensor cover 49 has a measuring gap 44, through which the yarn 9 (not shown in FIG. 4) is moved in its longitudinal direction x, as well as an insertion slot 45, through which the yarn 9 can be introduced into the measuring gap 44. The measuring gap 44 and the insertion slot 45 extend parallel to the longitudinal direction x. According to the invention, the projection of the insertion slot 45 in the plane (yz) is curved perpendicular to the longitudinal direction x. Such a bend brings several advantages. On the one hand, it prevents that through the insertion slot 45 light from the outside directly on the yarn 9 and / or on a

Photosensitive element 42 (see Fig. 3 (b)) of the sensor device 4 passes. As a result, the optoelectronic sensor device 4 is as good as possible of unwanted

Ambient light is shaded and the measurement signal is improved. On the other hand, the curvature also prevents light emitted by the light emitter 42 from coming directly outside and / or beyond the yarn 9, possibly causing personal injury. Thus, the work safety is increased. FIG. 5 shows a yarn conveying device 5 and a traversing device 7 of the device 1 (a) according to the invention from above and (b) from the side. The

Garnfordereinrichtung 5 is as a roller delivery with two cooperating

Conveyor rollers 51, 52 formed. A first active drive roller 51 is driven for rotation. The drive can by a drive device 6 (see FIG. 3 (b)), z. B. an electric motor, via a shaft 53. A second, passive pressure roller 52 is a non-driven, about a shaft 54 rotatable roller. The mantle surfaces of the two conveyor rollers 51, 52 are suitable for contacting and entrainment of the yarn 9 to be conveyed and consist z. B. of metal or an elastomer. The shaft 53 and the axis 54 of the two conveyor rollers 51, 52 are parallel to each other. The two lateral surfaces touch each other when no yarn 9 is inserted; otherwise, they clamp the yarn 9 between each other and convey it in the longitudinal direction x through the (not shown in Fig. 5) sensor means 4. The axis 54 of the pressure roller 52 is in the direction y perpendicular to the axial direction z and perpendicular to the yarn longitudinal direction x in a small area of 3 mm, for example, which is indicated by a double arrow 55 in FIG. 5 (a). It is acted on by a force which presses the pressure roller 52 against the drive roller 51, for example by means of a pneumatic pressure cylinder 56 (see FIG. 3 (b)). If the shaft 54 reaches a predetermined, external position, then a (not shown) limit sensor or limit switch automatically disengages the drive device 6. This firstly ensures that the drive device 6 in the open position of the conveyor rollers 51, 52, z. B. when loading the yarn 9, not running. Secondly, this prevents the formation of a coil. From a winding one speaks when the yarn 9 unwanted on one of the conveyor rollers 51, 52 starts to wind up. If this is the case, the wound yarn 9 increases the distance between the shaft 53 and the axis 54, so that finally the end position sensor responds and the drive device 6 stops. Similarly, the drive device is turned off when fingers, hair, clothing or

Jewelry pieces of an operator between the conveyor rollers 51, 52 pass. Third, accidents and injuries are avoided.

Another aspect of the invention relates to Garnchangierung. This is understood as a temporal change of the position of the yarn 9 in the direction z of the shaft 53 and the axis 54, in order uniformly to claim the lateral surfaces of the conveyor rollers 51, 52 in the axial direction z, instead of only at one position. The Garnchangierung is achieved according to the invention by the position of the yarn 9 is changed in the axial direction z by means of a traversing element 71 including traversing means 7 in the conveyor 5. In Fig. 5 (b), the traversing motion is indicated by a double arrow 75, and the yarn 9 is drawn in three different layers. In the embodiment discussed here, the traversing element 71 is designed as Garnführungsöse which is attached to the end of a movable rod 72 in the axial direction z, executed. The rod 72 and thus the

Garnführungsöse 71 is during the yarn conveying by means of a pneumatic

Traversing cylinder 73 (see Fig. 3 (b)) slowly in the axial direction z moves back and forth.

"Slow" in this context means that several meters of yarn are conveyed through the conveyor 5 during a traversing cycle, eg 2-20 m and

preferably 6-12 m. A first stationary yarn guide element 35 is mounted between the traversing device 7 and the sensor device 4 and provides a stable, stationary yarn run through the sensor device 4. Preferably downstream of the conveyor rollers 51, 52nd a second stationary yarn guide element 36 is attached. In the area of the sensor device 4, other stationary

Gamführungselemente be provided, for. At least one of the stationary yarn guide elements 35, 36 may be formed as a latch eye, in which the insertion of the yarn 9 from the front, d. H. through the insertion slot, 45, is simple, but pulling in the reverse direction is difficult. That by the

Sensor device 4 conveyed yarn 9 is sucked by means of Garnabsaugeinrichtung 37 (see Fig. 3 (b)) through a suction opening 25 in the front panel 22 in a (not shown) waste container.

The drive roller 51 is driven directly by the drive means 6, d. H. without the usual transmission belt or gearbox. This makes the device 1 particularly simple and inexpensive. It is advantageous on the shaft 53 between the

Drive means 6 and the drive roller 51 to attach a flexible coupling 8, which a possible location offset and / or angular displacement .DELTA..alpha. Between the

Drive shaft 57 and the output shaft 58 compensates, thus ensuring a uniform yarn run. Such a flexible coupling 8 is shown in FIG. Preferably a spiral coupling or bellows coupling made of metal or plastic is used.

Of course, the present invention is not limited to those discussed above

Limited embodiments. With knowledge of the invention, the skilled person will be able to derive further variants, which also belong to the subject of the present invention, as defined in the independent patent claims.

LIST OF REFERENCE NUMBERS

1 device

2 housings

21 frames

22 front panel

23 back plate

24 tabs

25 suction opening

31-34 yarn guide elements

35, 36 fixed Garnfuhrungselemente

4 sensor device

41 light transmitters

42 light receiver

43 circuit board

44 measuring gap

45 insertion slot

49 Sensor cover

5 yarn conveyor

51 drive roller

52 pressure roller

53 shaft of the drive roller

54 axis of the pressure roller

55 Movement of the axle

56 pressure cylinder for pressure roller

57 drive shaft

58 output shaft

59 Roller cover

driving means

7 traversing device

71 traversing element

72 staff

73 oscillating cylinder

75 traversing movement

8 flexible coupling

9 yarn

x Yarn longitudinal direction, yarn direction

y direction perpendicular to the yarn longitudinal direction, parallel to the front plate z direction perpendicular to the yarn longitudinal direction, perpendicular to the front plate

Claims

Device (1) for determining characteristics of a yarn (9), comprising a housing (2) and

a sensor device (4) mounted in or on the housing (2) for measuring at least one parameter of the yarn (9),

characterized,

that the housing (2) consists essentially of a front plate (22), a back plate (23) and between the front plate (22) and the rear plate (23) lying frame (21) and

the frame (21) is made in one piece and separately from the front plate (22) and the rear plate (23).

Device (1) according to claim 1, wherein the frame (21) is made of a bent metal sheet.

Device (1) according to one of the preceding claims, wherein the front plate (22) and the rear plate (23) formed as a flat plates and by means of

Screws on tabs (24) which are bent inwardly on the frame (21) are attached.

Device (1), preferably according to one of the preceding claims, for determining characteristics of a yarn (9), comprising

a housing (2) having a front panel (22) substantially perpendicular to a base,

a sensor device (4) mounted in or on the housing (2) for measuring at least one parameter of the yarn (9) and

other components (37, 43, 56, 6, 61, 73),

characterized,

that the front plate (22) of the housing (2) as a support element for the

Sensor device (4) and a plurality of further components (37, 43, 5, 56, 6, 61, 73) is used. The apparatus (1) according to claim 4, wherein said plurality of further members (37, 43, 5, 56, 6, 61, 73) are selected from the group consisting of: yarn guiding guide members (31-34) Sensor cover (49) for the sensor device (4), an electronic circuit for controlling parts of the device (1) and / or for evaluating signals of the sensor device (4), a yarn conveying device (5), a roller cover (59) for the

Garnfordereinrichtung (5), a drive device (6) for driving the

Garnfordereinrichtung (5), a controller (61) of the drive means (6), a traversing device (7), a Garnabsaugeinrichtung (37) and a

Pressure cylinder (56) for a yarn feed roller (52).

Device (1) according to claim 4 or 5, wherein the sensor device (4) and the several further components (37, 43, 5, 56, 6, 61, 73) directly on the front plate (22) and / or indirectly to angle profiles ( 25) which in turn are attached to the front panel (22) are mounted.

a sensor device (4) for measuring at least one parameter of the yarn (9) and

a sensor cover (49) for protecting the sensor device (4), wherein

the sensor cover (49) has a measuring gap (44) through which the yarn (9) can be moved in its longitudinal direction (x) and an insertion slot (45) through which the yarn (9) can be introduced into the measuring gap (44) , having,

characterized,

the projection of the insertion slot (45) is curved in a plane (yz) perpendicular to the longitudinal direction (x).

Device (1) according to claim 7, wherein the sensor device (4) has a

is optoelectronic sensor device (4) and the insertion slot (45) is curved such that light from the outside does not directly on the yarn (9) and / or on a photosensitive element (42) of the sensor device (4) passes, and / or light emitted by a light-emitting element (41) of the sensor device (4) does not pass directly and / or outward through the yarn.

a sensor device (4) for measuring at least one parameter of the yarn (9) and

a Garnfordereinrichtung (5) for conveying the yarn (9) through the

Sensor device (4), which Garnfördereinrichtung (5) is designed as a roller delivery with two co-operating conveyor rollers (51, 52), wherein

Axes (53, 54) of the conveyor rollers (51, 52) are parallel to each other and have a variable distance from each other and

at least one (51) of the conveyor rollers (51, 52) is driven,

marked by

an end position sensor or limit switch, which interrupts the drive of the driven conveyor roller (51) when the distance between the two axes (53, 54) has exceeded a predetermined threshold.

a sensor device (4) for measuring at least one parameter of the yarn (9) and

a yarn conveying device (5) for conveying the yarn (9) through the

Sensor device (4), which Garnfördereinrichtung (5) is designed as a roller delivery unit with two co-operating conveyor rollers (51, 52), wherein axes (53, 54) of the conveyor rollers (51, 52) are parallel to each other,

marked by

a traversing device (7) which temporally changes the position of the yarn (9) in the direction of (z) the axes (53, 54) of the conveyor rollers (51, 52) in the area of the yarn conveying device (5) during yarn feeding.

11. The device (1) according to claim 10, wherein the traversing device (7) comprises a trained as Garnfuhrungsöse traversing element (71), which in

Direction (z) of the axes (53, 54) of the conveyor rollers (51, 52) is movable back and forth.

12. Device (1) according to claim 11, wherein the traversing element (71) by a pneumatic traversing cylinder (73) is movable back and forth.

13. Device (1), preferably according to one of the preceding claims, for

Determination of characteristics of a yarn (9), including

a sensor device (4) for measuring at least one parameter of the yarn (9) and

a Garnfordereinrichtung (5) for conveying the Gams (9) through the

Sensor device (4), which Garnfördereinrichtung (5) as a roller delivery unit with two cooperating conveyor rollers (51, 52) is formed, wherein at least one (51) of the conveyor rollers (51, 52) by a drive means (6) is driven, characterized

that the at least one drivable conveying roller (51) directly through the

Drive device (6) is drivable.

14. Device (1) according to claim 13, wherein between the drive device (6) and the at least one drivable conveying roller (51), a flexible coupling (8) is mounted, which is preferably designed as a spiral coupling or Belgkupplung.

15. Use of the device (1) according to one of the preceding claims for determining the hairiness of the yarn (9).