JP2013006703A - Yarn guide element used for finger-like yarn guide - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a finger-like yarn guide which is comparatively inexpensive and includes a replaceable yarn guide element.SOLUTION: In the yarn guide element in which a yarn guide element is arranged on support rods fixed in a base body of the finger-like yarn guide, and applies a load so that the yarn travelling toward a surface of a cross winding package during winding operation may be reciprocated in a frictionally connected manner, the yarn guide element (11) is a thin stamping molded member (19) which can be positioned on the support rods (15, 16) to be replaceable. The thin stamping molded member (19) includes a metal material, and includes two sleeves (20A, 20B) respectively having slits, and connected by a joint web (21).

Description

  According to the present invention, a yarn guide element used for a finger-shaped yarn guide of the type described in the superordinate concept of claim 1, that is, a yarn guide element is arranged on a support rod fixed in a base body of a finger-shaped yarn guide. The invention relates to a yarn guide element of the type that is loaded so as to “reciprocate” the yarn traveling towards the surface of the traverse package in a frictional connection during the winding operation.

  Such a type of yarn guide element is basically known in connection with a finger-shaped yarn guide which traverses the yarn traveling towards the surface of the traverse package. DE 102005059028 or DE 102008053261 describes, for example, a finger-shaped yarn guide with a yarn guide element fixed to the base body of the finger-shaped yarn guide. Has been.

  In the yarn guide known from DE 102008053261 A, the base body consists of a magnesium die cast part. A ceramic yarn guide element is connected to the free end of the magnesium base body via a rod having bending elasticity, preferably a carbon fiber rod. That is, a carbon fiber rod is attached by adhesive bonding in a corresponding hole provided in the magnesium base body, and is formed on this carbon fiber rod as a ceramic sleeve, preferably also by adhesive bonding. One yarn guide element is attached to each. Such yarn guide elements made of ceramic material do not wear significantly even when the yarn is erosive, but based on the relatively low elongation at break of the ceramic, the yarn guide element during high frequency yarn feeding. There is a risk that the element will easily be damaged, for example as a result of a bending moment that cannot be completely eliminated, or that the ceramic will delaminate from the carbon fiber rod.

  Furthermore, the finger-shaped yarn guide known from DE 102008053261 has the disadvantage that the adhesive joints in the region of the carbon fiber rod form a mechanical weakening point. This weakened point cannot be avoided reliably or removed later to some extent.

  German Offenlegungsschrift DE 102005059028 describes a finger-shaped yarn guide. This finger-shaped yarn guide has two yarn guide elements formed as cylindrical hollow bodies each made of an alloy at the free end of its base body. These yarn guide elements form a yarn guide fork. Within this yarn guide fork, the yarn traveling towards the traverse package is guided during the winding process. In this case, the yarn guide element is fitted in the base body by means of a form-based connection (formschlussig) or by means of a friction-based connection (kraftschlussig) or is supported on an additional support rod made of carbon fibre. ing.

  In this case, forming the yarn guide element from an alloy has the advantage that this material is significantly less likely to break than ceramics. However, the yarn guide element made of an alloy has low wear resistance, that is, such a finger-shaped yarn guide is based on the wear phenomenon in the yarn guide element, compared to a finger-shaped yarn guide with a ceramic yarn guide element. Clearly needs to be exchanged frequently.

German Patent Application Publication No. 102005059028 German Patent Application No. 102008053261

  A finger-shaped yarn guide of the type described above, i.e. a yarn guide element, is arranged on a support rod fixed in the base body of the finger-shaped yarn guide and faces the surface of the traverse package during the winding operation. Starting from a finger-like yarn guide that guides the yarn traveling in a reciprocating manner, that is, to “reciprocate” with frictional contact, the problem underlying the present invention is a relatively inexpensive, exchangeable To provide a finger-shaped yarn guide with possible yarn guide elements, in which case the yarn guide element is on a support rod which on the one hand is connected to the base body of the finger-shaped yarn guide. Shaped so that it can be fixed in place and can be exchanged without problems when necessary It is desirable to have been.

  The object is to provide a yarn guide element for a finger-shaped yarn guide according to claim 1 of the present invention, i.e. a thin stamping molded part in which the yarn guide element can be positioned on a support rod in a replaceable manner ( The stamping member is solved by a yarn guide element comprising two sleeves with slits made of a metal material and connected by a single connecting web.

  Advantageous embodiments of the present invention are described in claims 2 and below.

  According to an advantageous embodiment of the invention, tempered spring steel is used as the material of the stamping molded part, and the stamping molded part is hardened following the shaping.

  According to an advantageous aspect of the present invention, the stamped molded member is surface treated after curing.

  According to an advantageous embodiment of the invention, a hard chrome plating process is applied as the surface treatment.

  According to an advantageous aspect of the invention, the connecting web has at least one locking contour, which is in the assembled state of the stamping molded member, the base body of the finger-shaped yarn guide. And is fitted on the engaging step portion provided in the shape connection type.

  According to an advantageous embodiment of the invention, the inner diameter of the sleeve with the slit is on the one hand assembled, while the relative force generated between the sleeve and the support rod during operation is suppressed by frictional forces. A preload large enough to be able to be applied, while at the same time a preload small enough to avoid damage when the stamping molded member is fitted over the support rod Have been selected.

  According to the present invention, the yarn guide element is a thin stamping member that can be exchangeably positioned on the support rod. This stamping molded part is made of a metal material and has two sleeves with slits connected by a single connecting web.

  The yarn guide element formed in this way not only has the advantage that the stamping forming member is reliably and always accurately aligned and can be fixed on the support rod, but also when necessary, i.e. the finger-like yarn If it appears that replacement of the yarn guide element appears to be recommended based on evidence of wear of the yarn guide element after a defined operating time of the guide, it can be replaced quickly and without problems.

  As claimed in claim 2, in an advantageous embodiment, the material of the stamping molded part is a spring steel that has been hardened following shape formation and is tempered (quenched and tempered). Yes.

  Such stamped molded parts manufactured and hardened from tempered spring steel are, on the one hand, less susceptible to damage from impact loads and on the other hand are relatively wear resistant.

  As described in claims 3 and 4, in an advantageous embodiment, the stamped molded part is further subjected to a surface treatment after curing, in this case as a surface treatment, preferably hard chromium Plating is used.

  Such stamped molded parts with hard chrome plating not only excel due to the extremely low coefficient of friction resulting in careful handling of the yarn to be reciprocated, but also are relatively damaged against environmental influences. hard.

  Furthermore, according to claim 5, the connecting web has at least one locking contour. In a state where the stamping molding member is assembled, the locking contour portion is fitted on the locking attachment portion provided on the base body of the finger-shaped yarn guide in a shape connection type, that is, by coupling based on the shape.

  This additional fixing of the stamping member in a shape-connected manner prevents the stamping member from being gradually displaced outward by centrifugal forces during the winding operation. In other words, the locking contour provided on the stamping molded member, together with the locking provided portion provided on the base of the finger-shaped yarn guide, ensures that the stamping molded member remains on the support rod throughout its entire operation period. To ensure that it is positioned.

  According to a sixth aspect of the present invention, the sleeve of the stamping molded member having the slit has an inner diameter corresponding to the outer diameter of the corresponding support rod formed as a carbon fiber rod.

  In this case, the inner diameter of the sleeve provided with the slit is large enough to suppress the relative force generated between the sleeve and the carbon fiber rod during operation by frictional force on the one hand. A preload is provided and, on the other hand, is selected such that a sufficiently small preload is provided to avoid damage as much as possible when the sleeve is fitted over the carbon fiber rod. The corresponding dimensional design between the sleeve and the carbon fiber rod allows for easy replacement of the worn stamped part if necessary, but also guarantees positive restraint of the stamped part on the support rod To do.

  Advantageously, an apparatus is used which facilitates the assembly of the stamping member on the support rod or the removal of the stamping member from the support rod when the worn stamping member is replaced.

  Such a device may have different configurations, but advantageously, the clamping device for always locking the base body of the finger-shaped yarn guide as well as the locking contour of the stamping molding member A tool is provided for lifting from the locking portion and moving the stamping member on the support rod in the axial direction.

  Further details of the invention can be seen from the embodiments described below with reference to the drawings.

1 is a perspective view showing the front of a winding device having a finger-shaped yarn guide with a yarn guide segment formed according to the present invention. FIG. FIG. 3 is a front view showing, on an enlarged scale, a finger-shaped yarn guide provided with a yarn guide element according to the present invention. 1 is a perspective view of a yarn guide element according to the present invention.

  FIG. 1 is a perspective view showing the front of the upper part of a work unit 1 of a textile machine for manufacturing a traverse package.

  As is known, such a working unit 1 usually has a winding unit casing 4 with an input device 3. In particular, the winding unit casing 4 further houses a control device 5 specific to the work unit.

  A winding device 6 is further arranged in the winding unit casing 4. The winding device 6 is mainly directed to the package frame 7 for holding the traversed package winding tube 8, the package driving roller 9, and the traversing package winding tube 8 or the traversing package during the winding operation. And a yarn traversing device 2 for reciprocating the traveling yarn.

  The yarn traversing device 2 has a finger-shaped yarn guide 10 provided with a yarn guide element 11 according to the present invention. As shown in the figure, the finger-shaped yarn guide 10 is connected to a motor shaft 18 of a reversible drive device 12 via a fixing / constraining element 17. The drive device 12 is connected to the control device 5 unique to the work unit via a control line 13. That is, the finger-shaped yarn guide 10 is defined and controllable via the control device 5, so that, for example, the yarn feeding speed and / or the yarn feeding width can be accurately adjusted during the winding process.

  FIG. 2 shows an enlarged scale of a finger-shaped yarn guide 10 with a yarn guide element 11 according to the invention.

  The finger-shaped yarn guide 10 has a base body 14 made of plastic. It can be seen that the support rods 15 and 16 and the fixing / restraining element 17 are embedded in the base body 14 during the casting process, that is, insert-molded.

  In this case, the support rods 15 and 16 formed as carbon fiber rods are formed to be significantly longer than the plastic base body 14 that accommodates the support rods 15 and 16. That is, the support rods 15, 16 protrude significantly beyond the base body 14 in the region of the free end on the narrow side of the base body 14, and in this case, for the yarn guide element 11 of the finger-shaped yarn guide 10. A support element is formed.

  The yarn guide element 11 arranged on the support rods 15, 16 is formed according to the invention as a stamping forming member 19, in particular two sleeves 20 A with slits and as clearly seen from FIG. 20B. These sleeves 20 </ b> A and 20 </ b> B are connected to each other via one connecting web 21.

  In this case, the slits in the sleeves 20A and 20B are always arranged so that the slits are facing outwards, that is to say that during yarn traversing, the yarn guide cannot be damaged by the slits. The slit is positioned as follows.

  Two locking contours 22 are integrally formed on the connecting web 21 that connects the sleeves 20A and 20B, that is, in one piece. The locking contour portion 22 is fitted in a shape-connecting manner on two corresponding locking-provided portions 23 provided on the base body 14 of the finger-shaped yarn guide 10 in a state where the stamping molding member 19 is incorporated. In this case, the stamping molding member 19 is fixed to the base body 14 in a shape connection manner.

  In an advantageous embodiment, the sleeves 20A and 20B with slits are further adapted to the outer diameter D of the support rods 15, 16 with respect to the inner diameter d of the sleeve 20A and 20B. In other words, the inner diameter d of the sleeves 20A and 20B having the slits is selected so that the sleeve is fixed on the support rod with a certain degree of preload after the sleeve is fitted on the support rods 15 and 16. ing.

  In this case, the preload, on the one hand, ensures a reliable holding of the sleeves 20A, 20B with slits on the support rods 15, 16 after assembly, and on the other hand, the sleeves 20A, Advantageously, 20B is selected so that a relatively trouble-free fit is possible.

  In other words, it means that it is desirable that damage to the support rods 15 and 16 manufactured from the carbon fiber material is avoided as much as possible when the stamping molded member 19 is assembled.

DESCRIPTION OF SYMBOLS 1 Work unit 2 Thread traverse device 3 Input device 4 Winding unit casing 5 Control device 6 Winding device 7 Package frame 8 Traverse package winding tube 9 Package drive device 10 Finger-shaped yarn guide 11 Yarn guide element 12 Drive device 13 Control Line 14 Base body 15 Support rod 16 Support rod 17 Fixed / restraint element 18 Motor shaft 19 Stamping molded member 20A Sleeve 20B Sleeve 21 Connecting web 22 Locking contour 23 Locking portion

Claims (6)

A yarn guide element used for a finger-shaped yarn guide of a yarn traverse device, wherein the yarn guide element is disposed on a support rod fixed in a base body of the finger-shaped yarn guide and is in a winding operation. In the yarn guide element of the type in which the yarn traveling toward the surface of the twill winding package is loaded so as to “reciprocate” in a frictional connection manner,
The yarn guide element (11) is a thin stamping molded member (19) which can be replaceably positioned on the support rod (15, 16), and the stamping molded member (19) is made of a metal material. And two yarn sleeve guides (20A, 20B) with slits connected by one connecting web (21). Yarn guide element.   2. The yarn guide element according to claim 1, wherein tempered spring steel is used as the material for the stamping member (19) and the stamping member (19) is hardened following the shaping. .   3. The yarn guide element according to claim 2, wherein the stamping member (19) is surface treated after curing.   The yarn guide element according to claim 3, wherein a hard chrome plating process is applied as a surface treatment.   The connecting web (21) has at least one locking contour (22), which is in the assembled state of the stamping forming member (19), with the finger-shaped yarn guide ( The yarn guide element according to claim 1, wherein the yarn guide element is fitted in a shape-connecting manner on a locking portion (23) provided on the base body (14) of 10).   The inner diameter (d) of the sleeves (20A, 20B) with the slits, on the one hand, in the assembled state, is the relative generated between the sleeve (20A, 20B) and the support rod (15, 16) during operation. A preload that is large enough to suppress the typical force by the frictional force, while at the same time causing damage when the stamping molded member (19) is placed over the support rod (15, 16). 2. A guide element according to claim 1, wherein the guide element is selected to provide a preload that is small enough to be avoided.

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