JP5836070B2 - Twist stop roller - Google Patents

Description

  The present invention relates to a twist stop roller of the type described in the superordinate concept part of claim 1, that is, a twist stop roller for guiding a yarn, wherein the ceramic body is provided with a rotationally symmetric ceramic body. Has a plurality of guide projections projecting in the radial direction of two groups in order to form a zigzag yarn traveling track on the outer periphery, and further provided with a holding bush for receiving the ceramic body, The ceramic body is non-rotatably coupled to the holding bush, and the ceramic body is of a type that is rotatably guided through the holding bush.

  In fiber processes that produce, process and process yarns, it is generally known to limit the propagation of yarn twist or twist by twist stop devices. For example, in the false twist texturing process, the texturing zone for heat treating and fixing the false twisted yarn for texturing is defined by a twist stop roller.

  Such a twist stop roller is known, for example, based on DE102005029400A1. In this known twist stop roller, the yarn is guided in a zigzag yarn running track, which is provided around a rotationally symmetrical ceramic body. For this purpose, the ceramic body is formed from two ceramic discs, both ceramic discs having guide projections that are uniformly distributed around the periphery at their opposite end faces, and the two ceramic discs are mutually connected. Overlapping is guided by a holding bush at the centering diameter. For the fixing, support elements are assigned to both end faces located on the outer side of the ceramic disk, and these support elements are screwed together via a plurality of screws. In order to support the ceramic disc, the holding bush is non-rotatably coupled to a pivotally supported shaft.

  The known twist stop roller has the disadvantage that the ceramic body or the ceramic disc forming the ceramic body is held by screw connection. Since ceramic is a particularly brittle material, non-uniformities in the fixing and tightening portions of the ceramic body cause damage to the ceramic body very early. Therefore, when using screw connections, the screw connections must be made very carefully and uniformly. Since it is almost impossible to tighten the screws uniformly, the known solution must always take into account the shaft touch of the ceramic disk.

DE102005029400A1

  The object of the present invention is therefore to improve the twist stop roller of the type mentioned at the outset and to provide a twist stop roller in which the ceramic body is prevented from being damaged as much as possible and fixed to the holding bush.

  Another object of the present invention is to improve the twist stop roller of the type described at the outset, and to provide a twist stop roller in which the ceramic body is held so that it can be easily mounted and removed.

  Yet another object of the present invention is to improve the kinematic characteristics of a twist stop roller of the type described at the outset so that uniform process conditions during operation are obtained.

  In order to solve the above problems, in the configuration of the present invention, the holding bush is formed of an inner bearing sleeve and an outer clamp sleeve, and the inner bearing sleeve and the outer clamp sleeve have one or a plurality of radii. Coaxially connected to each other via a directional retaining web.

  Another advantageous configuration of the invention is described in claims 2 and below.

  The invention stands out because the holding bushing has a separate sleeve member for rotational guidance and fixing of the ceramic body. The construction of the clamping sleeve necessary for fixing the ceramic body can be carried out independently of the bearing sleeve formed for the bearing or the rotation guide. The outer clamping sleeve and the inner bearing sleeve are non-rotatably connected to one another via at least one radial retaining web, in which case the clamping sleeve, the retaining web and the bearing sleeve are preferably formed in one piece. Has been. In order to be able to form an elastic clamping region, in particular in the region of the clamping sleeve, the coupling between the bearing sleeve and the clamping sleeve is preferably effected by a plurality of radial retaining webs, Are evenly distributed around the sleeve.

  In order to allow as much play-free reception of the ceramic body as possible, in another advantageous configuration of the invention, the clamping sleeve is elastically deformed in the radial direction, distributed around it and extending axially. It has a plurality of possible clamping tongues, which are in contact with the centering diameter of the ceramic body at a plurality of clamping surfaces. With this construction, the ceramic body can be advantageously clamped in the axial direction without play, and due to the elastic deformability of the clamping surface, a corresponding compensation can be provided over the entire circumference of the centering diameter. It can be carried out. The ceramic yarn guide is supported radially at a plurality of support points by a plurality of clamp tongues formed in a distributed manner around the clamp sleeve.

  In order to axially fix the ceramic body, in another advantageous configuration of the invention, the clamping tongue has a clamping collar at one end of the clamping surface, which clamping collar is on one end surface of the ceramic body. In contact. This construction facilitates the mounting of the ceramic body, especially around the clamp sleeve, where the ceramic body is covered by the centering diameter on the clamp tongue and pushed in until it reaches the fixed collar.

  In a particularly advantageous configuration of the invention, the clamping sleeve has a plurality of flexible holding tongues distributed around it, the holding tongue comprising a plurality of holding collars, The piece can be guided in the radial direction from the holding position to the mounting position, and the holding collar of the holding tongue piece is in contact with the end face of the ceramic body located on the opposite side of the clamp collar. As a result, the axial fixing of the ceramic body at both end faces is made possible by the clamp sleeve. Due to the special configuration of the fixed collar and the retaining collar, errors of the ceramic body in the axial direction can also be compensated elastically.

  In order to further improve the radial and axial fixation of the ceramic body, in another advantageous configuration of the invention, the clamping sleeve has a plurality of cuts between the clamping tongue and the holding tongue, A lock sleeve can be pushed between the clamp sleeve and the bearing sleeve, the lock sleeve having a plurality of support webs that engage the notches of the clamp sleeve, the support webs being centered diameter portions of the ceramic body. Touching. With this configuration, the ceramic body can be additionally supported in the radial direction.

  In a particularly advantageous configuration for improving the axial fixing of the ceramic body, the locking sleeve has an annular fixing ring which is assigned to the holding tongue for fixing the holding position. Yes. With this construction, the inconvenient deformation of the holding tongue is no longer possible, so that it is ensured that inadvertent withdrawal of the ceramic body from the clamping sleeve is avoided even when an external action is applied. be able to.

  In connection with the bearing part or the rotation guide part, the bearing sleeve may have the same sleeve width as the clamp sleeve or a larger sleeve width than the clamp sleeve.

  Further advantageously, the bearing sleeve, the clamp sleeve and the retaining web are formed from plastic moldings, which are connected in form-coupled fashion with the inner rolling bearing. The plastic molded product can be formed, for example, as a covering body or a surrounding body surrounding the rolling bearing immediately after the shape is imparted. Thus, the twist stop roller according to the present invention can be formed by collecting a small number of members.

  For a yarn guide in a yarn running track formed around a twist stop roller, in another advantageous configuration of the invention, the ceramic body is formed from two ceramic discs combined, Each of the plates has a plurality of axial tongue pieces and a plurality of notches provided with protruding guide protrusions alternately on one end face, and the plurality of axial tongue pieces and the plurality of notches are mutually connected. Is engaged. With this construction, a high surface quality can be produced especially on the surface necessary for the yarn guide in the yarn traveling track.

  In order to avoid catching of the filament of the yarn at the groove bottom of the yarn running track, in a particularly advantageous configuration of the invention, the axial tongues of both ceramic discs each have a raised guide web at the base of the guide projection. And the guide web forms a yarn running track together with the guide projection. With this construction, only the guide webs formed directly on the bases of the guide projections of both ceramic discs are used alternately for the yarn guide. The yarn is then moved away from the split seam of the ceramic disk inside the yarn track.

  In a further embodiment of the invention, which is advantageous for rotational transmission, the ceramic body has at least one convex portion projecting radially inwardly around the periphery of the clamp sleeve. Is engaged with a recess provided in the. If comprised in this way, even if clamp force is small, fixation which cannot be rotated will be attained.

It is a cross-sectional view which shows 1st Embodiment of the twist stop roller by this invention. It is the side view which looked at the embodiment shown in Drawing 1 from one direction. It is the side view which looked at embodiment shown by FIG. 1 from the other direction. It is a cross-sectional view which shows another embodiment of the twist stop roller by this invention. It is the side view which looked at the embodiment shown in Drawing 4 from one direction.

  Next, embodiments of the present invention will be described with reference to the drawings.

  1-3, a first embodiment of a twist stop roller according to the present invention is shown in a plurality of drawings. FIG. 1 shows a first embodiment in a cross-sectional view, and FIGS. 2 and 3 each show a side view. Unless specified otherwise from any of these figures, the following description applies to all drawings.

  This embodiment of the twist stop roller has a rotationally symmetric ceramic body 1, which is formed by two assembled ceramic discs 2.1, 2.2. A plurality of guide protrusions 4.1 and 4.2 distributed in the periphery and projecting in the radial direction are arranged on the end faces of the ceramic disks 2.1 and 2.2 facing each other. At the base of these guide projections 4.1, 4.2, the ceramic discs 2.1, 2.2 have axial tongues 3.1, 3.2 projecting in the axial direction. The axial tongues 3.1, 3.2 form one guide web 5.1, 5.2 on their outer surfaces, respectively.

  In FIG. 1, the cross section of the ceramic disc 2.1 is shown in the upper half of the figure. Here, one of the guide projections 4.1 with axial tongue 3.1 and guide web 5.1 is shown. The axial tongue 3.1 of the ceramic disc 2.1 is engaged in an overlapping manner with a corresponding notch 27.2 of the ceramic disc 2.2.

  In the lower half of FIG. 1 a cross section of a ceramic disc 2.2 is shown, which comprises an axial tongue 3.2 and a guide web 5.2. And a guide projection 4.2. As a result, the axial tongue 3.2 of the ceramic disc 2.2 cooperates with the notch 27.1 in the ceramic disc 2.1, so that the guide projections 4.1, which are located facing each other, are located. 4.2 and the guide webs 5.1 and 5.2 formed at the base of these guide protrusions 4.1 and 4.2 are an annular and zigzag yarn traveling track 20 for guiding the yarn. Is forming.

  The ceramic discs 2.1, 2.2 are arranged together on the holding bush 10. For this purpose, the holding bush 10 is formed of an outer clamp sleeve 11 and an inner bearing sleeve 13, and the outer clamp sleeve 11 and the inner bearing sleeve 13 are coaxial with each other via a plurality of holding webs 12. Combined. The clamping sleeve 11, the bearing sleeve 13 and the retaining web 12 are preferably formed in one piece and are manufactured as a plastic molding.

  The clamp sleeve 11 is distributed over the entire circumference and is formed into a plurality of clamp tongues 15 and holding tongues 18 which are oriented in the axial direction, and between the clamp tongues 15 and the holding tongues 18. Each is provided with one notch 23. Since these notches 23 extend over the partial width of the clamp sleeve 11, the clamp tongue 15 and the holding tongue 18 are joined together by a closed ring formed on one end face of the clamp sleeve 11. Is retained. The clamping tongue 15 and the holding tongue 18 therefore each have one free end, which forms the mounting side 8 of the clamping sleeve 11. The mounting side 8 of the clamp sleeve 11 is shown in the side view of FIG.

  The opposite side of the clamp sleeve 11 is called the abutment side 9 in the illustrated embodiment, and this abutment side 9 is shown in FIG.

  The clamping tongue 15 will now be further described with reference to the upper half of FIG. 1 in which the clamping sleeve 11 is shown in cross section in the region of the clamping tongue 15. In this case, the clamping tongue 15 is axially oriented and has an outer clamping surface 16. Ceramic discs 2.1 and 2.2 are held on the clamping surface 16 via centering diameter parts 6.1 and 6.2, respectively, without play. For this purpose, the clamping surface 16 of the clamping tongue 15 is formed elastically.

  On the attachment side 8 of the clamp sleeve 11, the clamp tongues 15 each have one inclined part in order to allow a press fit of the ceramic discs 2.1, 2.2.

  The clamping tongues 15 each have one clamping collar 17 on the abutment side 9 located opposite to the clamping sleeve 11, which clamp collar 17 projects radially and secures the ceramic disc 2.1. Engage with the recess 7.1.

  As shown in FIG. 3, the clamp sleeve 11 has a total of four clamp tongues 15 distributed over the entire circumference. Accordingly, each of the four clamp collars 17 distributed over the entire circumference acts on the ceramic disc 2.1.

  As can be further understood from FIG. 2, the ceramic disc 2.1 has one convex portion 21 projecting inward at two positions arranged by being shifted by 180 °. The convex portions 21 are engaged with corresponding concave portions 22 provided around the clamp sleeve 11 in order to prevent the ceramic disks 2.1 and 2.2 from rotating.

  Next, the clamp sleeve 11 will be further described with reference to FIGS. In the lower half of FIG. 1, the holding tongue 18 in the clamping sleeve 11 is shown in cross-section. The holding tongue 18 has a holding collar 19 on the mounting side 8 of the clamp sleeve 11. The holding collar 19 is formed in a flexible manner in the radial direction, and is deformed from the holding position shown in the figure by deformation of the holding collar 19. It can be displaced to the mounting position. The mounting position of the holding collar 19 is selected so that the outer diameter of the holding collar 19 substantially corresponds to the size of the centering diameters 6.1 and 6.2 of the ceramic discs 2.1 and 2.2. In the holding position, the holding collar 19 of the holding tongue 18 is arranged in contact with the fixing recess 7.2 of the ceramic disc 2.2. As a result, the axial fixing of the two ceramic discs 2.1 and 2.2 around the clamp sleeve 11 is ensured by the clamp collar 17 of the clamp tongue 15 and the holding collar 19 of the holding tongue 18.

  As can be seen from FIG. 3, the clamp sleeve 11 has a total of four holding tongues 18 distributed uniformly around the entire circumference, which holding tongues 18 have their holding collars 19, ceramic discs. It acts on the end face of 2.2.

  As shown in FIGS. 1 to 3, the clamp sleeve 11 is connected to a bearing sleeve 13 located inside via a plurality of radial holding webs 12. The bearing sleeve 13 is substantially formed as a closed ring and surrounds the rolling bearing 14. The rolling bearing 14 is preferably embedded in the bearing sleeve 13 and is non-rotatably connected to the bearing sleeve 13 via an outer bearing ring. As a result, direct acceptance and support via the rolling bearing 14 is possible.

  FIGS. 4 and 5 show another embodiment of a twist stop roller according to the invention, in which the radial and axial fixation of the ceramic discs 2.1, 2.2 is particularly important. Further improvements have been made. The illustrated embodiment is substantially the same as the previously described embodiment shown in FIGS. 1-3, so only the differences will be described below.

  In the embodiment shown in FIGS. 4 and 5, between the clamp sleeve 11 and the bearing sleeve 13, an additional locking sleeve 24 is attached to the intermediate chamber between the clamp sleeve 11 and the bearing sleeve 13. 8 is pushed in. The locking sleeve 24 has a respective supporting web 25 in the region of the notch 23 of the clamping sleeve 11, this supporting web 25 being the centering diameter part 6.1, 6 of the ceramic disc 2.1, 2.2. .2 and the bearing sleeve 13. This gives rise to an additional radial support of the ceramic disks 2.1, 2.2 via the support web 25 of the lock sleeve 24.

  Furthermore, the locking sleeve 24 has an annular fixing ring 26, which extends between the free end of the holding tongue 18 and the bearing sleeve 13. As a result, flexible deformation of the holding tongue 18 is no longer possible. The axial fixation of the ceramic discs 2.1, 2.2 generated via the holding collar 19 is ensured via the fixing ring 26 of the lock sleeve 24.

  In the embodiment shown in FIGS. 4 and 5, the bearing sleeve 13 is formed with a larger sleeve width than the clamp sleeve 11. In this case, a rolling bearing is held inside the bearing sleeve 13, and this rolling bearing has, for example, a plurality of rolling elements positioned side by side. In this way, for example, two rows of rolling bearings can be advantageously integrated into the bearing sleeve 13 of the holding bush 10.

  The embodiment of the twist stop roller shown in FIGS. 1 to 5 merely illustrates the structure of the twist stop roller. Basically, the clamping tongue or holding tongue can be provided with cuts or notches or other structural modifications, in particular to promote the flexibility and elasticity of the respective tongue. . Similarly, a ceramic body with two ceramic discs is also possible. Basically, it is also possible to guide a monolithic or multi-part ceramic body in the holding bush thus formed.

  1 Ceramic body, 2.1, 2.2 Ceramic disc, 3.1, 3.2 Axial tongue, 4.1, 4.2 Guide projection, 5.1, 5.2 Guide web, 6.1 , 6.2 Centering diameter part, 7.1, 7.2 Fixed recess, 8 Mounting side, 9 Abutting side, 10 Holding bush, 11 Clamp sleeve, 12 Holding web, 13 Bearing sleeve, 14 Rolling bearing, 15 Clamp tongue Piece, 16 Clamp surface, 17 Clamp collar, 18 Holding tongue piece, 19 Holding collar, 20 Yarn traveling track, 21 Convex portion, 22 Concavity, 23 Cut, 24 Lock sleeve, 25 Support web, 26 Fixing ring, 27.1 27.2 Notch

Claims (11)

A twist stop roller for guiding yarns, which is provided with a rotationally symmetric ceramic body (1), and the ceramic body (1) forms a zigzag yarn traveling track (20) on the outer periphery. For this purpose, two groups of guide protrusions (4.1, 4.2) projecting in the radial direction are provided, and a holding bush (10) for receiving the ceramic body (1) is provided. The ceramic body (1) is non-rotatably coupled to the holding bush (10), and the ceramic body (1) is rotatably guided through the holding bush (10).
The holding bush (10) is formed of an inner bearing sleeve (13) and an outer clamp sleeve (11). The inner bearing sleeve (13) and the outer clamp sleeve (11) may be one or more. A twist stop roller, characterized in that it is connected coaxially to each other via a radial holding web (12).   The clamping sleeve (11) has a plurality of clamping tongues (15) which are distributed around and extend in the axial direction and which are elastically deformable in the radial direction, the clamping tongues (15) being 2. The twist stop roller according to claim 1, wherein a plurality of clamping surfaces (16) are in contact with the centering diameter part (6.1) of the ceramic body (1).   Each of the clamp tongues (15) has a clamp collar (17) at one end of the clamp surface (16), and the clamp collar (17) is in contact with one end surface of the ceramic body (1). The twist stop roller according to claim 2.   The clamping sleeve (11) has a plurality of flexible holding tongues (18) distributed around it, the holding tongue (18) comprising a plurality of holding collars (19), The holding tongue (18) can be guided in the radial direction from the holding position to the mounting position, and the holding collar (19) of the holding tongue (18) is in the holding position the clamping collar ( The twist stop roller according to claim 2 or 3, which is in contact with an end face located on the opposite side to 17). The clamp sleeve (11) has a plurality of cuts (23) between the clamp tongue (15) and the holding tongue (18), and between the clamp sleeve (11) and the bearing sleeve (13). A lock sleeve (24) is disposed, the lock sleeve (24) having a plurality of support webs (25) that engage the notches (23) of the clamp sleeve (11), the support webs ( 25. The twist stop roller according to claim 4 , wherein 25) is in contact with the centering diameter part (6.1) of the ceramic body (1). The locking sleeve (24) has an annular locking ring (26) which is free from the holding tongue (18) to prevent deformation of the holding tongue (18) . 6. A twist stop roller according to claim 5, which extends between the end and the bearing sleeve (13) . The bearing sleeve (13) has a larger sleeve width compared to the clamp sleeve (11), which means the axial length of the bearing sleeve (13) . The twist stop roller of any one of Claims.   The bearing sleeve (13), the clamp sleeve (11) and the holding web (12) are formed of a plastic molded product, and the bearing sleeve (13) is coupled to the rolling bearing (14) located inside in a shape coupling manner. The twist stop roller according to any one of claims 1 to 7.   The ceramic body (1) has at least one convex portion (21) projecting radially inward on the periphery, and the convex portion (21) is provided around the clamp sleeve (11). The twist stop roller according to any one of claims 1 to 8, wherein the twist stop roller is engaged with the recess (22).   The ceramic body (1) is formed of two ceramic discs (2.1, 2.2) which are put together, and the ceramic discs (2.1, 2.2) are alternately arranged on one end face. And a plurality of axial tongues (3.1, 3.2) and a plurality of notches (27.1, 27.2). 3.2) and the plurality of notches (27.1, 27.2) are engaged with each other and are provided with protruding guide protrusions (4.1, 4.2). The twist stop roller according to any one of 9 to 9.   The axial tongues (3.1, 3.2) of both ceramic discs (2.1, 2.2) are raised at the base of the guide projections (4.1, 4.2), respectively. 5.1, 5.2), the guide web (5.1, 5.2) together with the guide projections (4.1, 4.2) form a yarn traveling track (20). The twist stop roller according to claim 10.

Images