CN112478939B

CN112478939B - Device for guiding a plurality of yarns

Info

Publication number: CN112478939B
Application number: CN202010939039.5A
Authority: CN
Inventors: D·鲍尔
Original assignee: Oerlikon Textile GmbH and Co KG
Current assignee: Oerlikon Textile GmbH and Co KG
Priority date: 2019-09-11
Filing date: 2020-09-09
Publication date: 2023-12-19
Anticipated expiration: 2040-09-09
Also published as: CN112478939A; DE102019006417A1

Abstract

The invention relates to a device for guiding a plurality of yarns, comprising a plurality of exchangeable guides each having a guide groove, at which the yarns can be guided in a contact manner. The guide element is held on a carrier plate which has a plurality of recesses formed next to one another on the longitudinal side. The indentation has a plurality of insertion openings for receiving the guide and a plurality of friction slots for positioning the guide, wherein the insertion openings communicate to the friction slots and the friction slots are delimited by a plurality of protrusions in the indentation. The guide elements each have an external holding groove for guiding in a friction slot of the carrier plate, wherein the carrier plate is mounted on the holding plate in a displaceable manner between a working position and a replacement position, so that the guide elements in the working position can be secured in a form-fitting manner between the holding plate and the carrier plate. Thus, a reliable holding of the guide is ensured, but it is still easy to replace.

Description

Device for guiding a plurality of yarns

Technical Field

The present invention relates to a device for guiding a plurality of yarns.

Background

It is common in the production and processing of yarns to guide moving yarns to follow a particular yarn run. For this purpose, special devices for guiding a plurality of yarns are used, wherein the areas contacted by the yarns have a special wear protection. The high-tolerance contact surface, which is usually formed by a ceramic guide, is necessary in particular in the case of synthetic yarns. The guide, which in most cases is designed as a molded part, is then held by the carrier. Such a device with a plurality of guides is for example obtained from DE2242362 A1.

In the known devices for guiding a number of yarns, ceramic guides are held on a carrier plate. For this purpose, the carrier plate has a plurality of cutouts (notch) on the longitudinal side, into which the guide elements are inserted. In this case, it is common for the guide to be held on the carrier plate by means of adhesive bonding. However, this bonding has fundamentally the following drawbacks: the adhesion is released under external influence, for example by spin finish adhering to the yarn. The result is a complete failure of the guides on the carrier plate.

On the contrary, DE20010219U1 discloses a device for guiding a yarn, in which the guide elements are held in a row on the carrier rail in a form-fitting manner. For this purpose, the guide has a holding part which is screwed onto one end of the carrier rail and pushed into the carrier rail. However, in the case of such a device, there are fundamentally the following problems: in most cases, it is first necessary to remove a plurality of guides from the carrier rail in order to replace one of the guides. Furthermore, the sliding guidance of the guide takes up a fixed position of the guide for guiding the yarn, which is particularly disadvantageous.

Disclosure of Invention

It is therefore an object of the present invention to improve a device for guiding a plurality of yarns of the type mentioned in the introduction, resulting in a reliable retention of the yarn guide and in a convenient exchange of the guide for the operator.

According to the invention, this object is achieved by a device for guiding a plurality of yarns.

The invention is characterized in that the yarn guide is held on the carrier plate in a form-fitting manner, thereby being easy to replace. The cutout thus has a plurality of insertion openings for receiving the guide, into which the guide can be inserted. Furthermore, the cutout has a plurality of friction slits for positioning the guide, which communicate to the insertion opening and are delimited by a plurality of projections in the cutout. Each guide has an outer holding groove for guiding in a friction slot of the carrier plate, wherein the carrier plate is mounted on the holding plate in a manner movable between a working position and a replacement position, so that the guide in the working position can be fixed in a form-fitting manner between the holding plate and the carrier plate. The guide is thus given a precise positioning on the carrier plate in order to be able to guide a plurality of yarns.

In order to change the guide element on the carrier plate, a development of the invention is preferably achieved in which the carrier plate is movable relative to the holding plate such that the insertion opening of the cutout in the change position remains open for the free insertion or removal of the guide element. Thus ensuring a quick replacement of the guide or guides.

In order to maintain the guide element in place in the working position in a stable and reliable manner, the invention is preferably modified in that the guide element has a respective stop surface opposite the guide groove, and the stop surfaces of the guide element preferably interact with the anastomotic longitudinal edges of the retaining plate. The guide can thus advantageously be clamped between the projection of the cutout on the carrier plate and the longitudinal edge of the retaining plate.

U-shaped parts made of ceramic material have proved particularly successful as guides.

In order to obtain a reliable guidance of the carrier plate with a large number of guides on the carrier plate, the following inventive development is particularly advantageous, wherein the carrier plate is constructed in a sandwich manner and the carrier plate is arranged and displaceable between the two sides of the holding plate. Thus, the holding plate sides on the upper side of the carrier plate and on the lower side of the carrier plate can allow for a uniform movement of the carrier plate.

In order to fix the guide, the following inventive development has proved successful here, wherein each side has a longitudinal edge which coincides with the stop structure of the guide.

In order to achieve the desired tight spacing between the guides on the carrier plate, an improvement of the invention is provided. The spacing of the friction slits on the carrier plate is in this case such that the projections are formed on the thin separating webs and adjacent separating webs are arranged in a mirror-symmetrical manner and are located in pairs between adjacent insertion openings. Thus, only every other slit has an insertion opening to enable insertion of the respective guide.

However, the adjacent separating webs of the carrier plate are configured elastically (flexible) such that one of the guide elements can be inserted into the corresponding friction slot. It is thus possible to insert the yarn guides directly into those friction slots which are not assigned any insertion openings by deforming the separating webs. The separating web is preferably fitted in the insertion opening before the insertion of the thread guide.

Since a plurality of guides require a corresponding carrier plate length, it is further provided that the carrier plate has at its ends at least two oblong holes which are penetrated by pins of the holding plate for guiding the carrier plate. Thus, a precise positioning of the carrier plate on the holding plate can be obtained by adjusting the opening of the oblong hole and the pin diameter.

Preferably, the carrier plate and the holding plate in the operating position are fixedly connected to each other by means of releasable fastening means.

The device according to the invention for guiding a plurality of yarns is particularly suitable for a melt spinning apparatus for guiding a plurality of yarns as a yarn set. The holding plate may be fixed in the housing or may be mounted in the housing in a movable manner by means of an actuator. Here, the replacement of the guide can be performed directly in the machine without the need to remove the machine from the frame.

Drawings

The invention will be explained in more detail below with reference to the accompanying drawings and by means of several embodiments of a device for guiding a plurality of yarns according to the invention, in which:

fig. 1.1 and 1.2 schematically show plan views of a first embodiment in a replacement position and in a working position;

fig. 2.1 and 2.2 schematically show cross-sectional views of the embodiments of fig. 1.1 and 1.2;

fig. 3 shows schematically a plan view of the guide of the embodiment of fig. 1.1 and 1.2;

fig. 4.1 and 4.2 show a further embodiment of the device for guiding a plurality of yarns according to the invention in a change position and in an operating position; and

fig. 5.1 and 5.2 show cross-sectional views of the embodiments of fig. 4.1 and 4.2.

Detailed Description

A first embodiment of the device according to the invention for guiding a plurality of yarns is schematically shown in fig. 1.1 and 1.2 and fig. 2.1 and 2.2 in different view angles and in different positions. A plan view of an embodiment is shown in both fig. 1.1 and fig. 1.2, and a cross-sectional view of this embodiment is shown in both fig. 2.1 and fig. 2.2. This embodiment is shown in the replacement position in fig. 1.1 and 2.1, and in the working position in fig. 1.2 and 2.2. To the extent that no explicit mention is made of any of the figures, the following description applies to all of the figures.

A first embodiment of the device according to the invention for guiding a plurality of yarns has a carrier plate 1 with a plurality of cutouts 1.2 on the front longitudinal side 1.1.

As can be seen from the illustration in fig. 1.1, six cutouts 1.2 are arranged next to one another on the longitudinal side 1.1 of the carrier plate 1. The number of incisions 1.2 is exemplary here. Each incision 1.2 has the same construction and has an insertion opening 1.4 in the root area. The insertion opening 1.4 is delimited by a cross-sectional constriction of the incision 1.2. The narrowing of the slit 1.2 forms a friction slit 1.3 which communicates with the insertion opening 1.4. The cutout 1.2 has a plurality of projections 1.5 in a front region facing the longitudinal side 1.1, which projections face one another and delimit the friction slot 1.3.

As can also be seen from fig. 1.1, the carrier plate 1 has in each case one oval opening 1.6 in the end region, which opening is arranged substantially parallel to the cutout 1.2.

As can be seen in particular from the illustrations in fig. 2.1 to 2.2, the carrier plate 1 is arranged on the underside of the holding plate 2. Fig. 2.1 shows a cross section in the connection region between the holding plate 2 and the carrier plate 1, and fig. 2.2 shows a cross section of one of the cutouts 1.2 in the carrier plate 1.

As can be seen from fig. 1.1 and 1.2, the holding plate 2 extends over the entire carrier plate 1 and has a holding end 2.5 with a holding opening 2.1 at one end. The holding plate 2 can be fastened to a frame or an actuator by means of the holding end 2.5, for example. The holding plate 2 has a recess 2.6 in the region of the cutout 1.2 of the carrier plate 1. The recess 2.6 is delimited by a longitudinal edge 2.2 with a concave-convex contour (profiled).

Two fastening elements 4 with pins 4.1 passing through the oblong holes 1.6 are provided on the holding plate 2 in the region of the oblong holes 1.6 of the carrier plate 1.

As can be seen from fig. 2.1, the pin 4.1 has a threaded portion 4.2 at the lower end, by means of which the carrier plate 1 can be fixed to the holding plate 2.

As can be seen from the illustrations in fig. 1.1 and 2.2, the cutout 1.2 of the carrier plate 1 serves to accommodate the individual guide elements 3. For the explanation of the guide, reference is additionally made to fig. 3.

As can be seen from the illustration in fig. 3, the guide 3 is formed from a molded part 3.1, preferably made of a ceramic material. The molding 3.1 is configured in a U-shape and has a guide slot 3.2. The guide groove 3.2 is used for guiding the yarn. A lower stop surface 3.2 is formed on the molded part 3.1 opposite the guide groove 3.2. The stop surface 3.2 is preferably embodied in a curved form to allow precise positioning by means of the counter surface.

The side profiles 3.1 each have a holding groove 3.3 which penetrates the profile 3.1 from the upper side to the lower side. The holding grooves 3.3 formed on both sides of the molded part 3.1 have a groove width corresponding to the wall thickness of the support plate 1. The guide 3 designed in this way has an outer contour in the molded part 3.1, which outer contour is preferably embodied slightly smaller than the insertion opening 1.4 in the carrier plate 1. For this purpose, the guide 3 can be inserted into the insertion opening 1.4 of the cutout 1.2 in the carrier plate 1.

As shown in fig. 1.1, a molded part 3 is inserted into each insertion opening 1.4 and pushed into the friction slot 1.3, in which the guide part 3 is guided by the holding groove 3.3. This is shown in fig. 1.1 and 2.1. In this case, the carrier plate 1 is freely movably held by the holding plate 2. The carrier plate 1 is moved to the forward position in a freely accessible manner to the insertion opening 1.4. This location is referred to herein as the change location. The replacement position of the carrier plate 1 thus allows replacement of the guide 3.

Once the carrier plate 1 is provided with the desired number of guides 3, the carrier plate 1 is pushed back onto the holding plate 2. The carrier plate 1 is moved until the guide 3 is supported by its stop surface 3.4 on the longitudinal edge 2.2 of the carrier plate 1 with the concave-convex contour. On the opposite side, the guide 3 is supported on a projection 1.5 of the carrier plate 1. The molded part 3 is now held in a form-fitting manner between the carrier plates and between the holding plates 2. The position of the fastening part 4 of the carrier plate 1 by means of screw engagement is fixed, so that the carrier plate 1 and the holding plate 2 are firmly connected to one another. This is shown in fig. 1.2 and 2.2.

The carrier plate 1 in fig. 1.2 and 2.2 is in an operating position in which the guides 3 are held to guide one yarn each.

In order to be able to guide a plurality of yarns, a further embodiment of the device according to the invention is schematically shown in fig. 4.1 and 4.2 and fig. 5.1 and 5.2. Fig. 4.1 and 4.2 show plan views, fig. 5.1 and 5.2 show cross-sectional views, the embodiment in fig. 4.1 and 5.1 being shown in the replacement position and the embodiment in fig. 4.2 and 5.2 being shown in the working position.

As can be seen in particular from fig. 4.1, the carrier plate 1 has a plurality of cutouts 1.2 on the longitudinal side 1.1. The dimensions of the gap 1.2 are closely dimensioned such that the gaps 1.2 are separated from one another only by the elastic separating webs 1.7. In this embodiment, therefore, a total of 24 cutouts 1.2 are arranged alongside one another on the longitudinal side 1.1 of the carrier plate 1. However, the incision 1.2 does not have the same embodiment. Only every other slit 1.2 is provided with an insertion opening 1.4 by the tight spacing of the slits 1.2. The separating webs 1.7 are thus held in pairs so as to be mirror images of each other between two adjacent insertion openings 1.4. Thus, a pitch in the range of 4 to 8 mm for yarn guidance can be achieved.

In order to assemble the guide 3 in the cutout 1.4 without the insertion opening 1.4, the guide 3 is inserted directly into the corresponding friction slot 1.3. Because of the elasticity of the separating web 17 here, it is possible to deform the separating web for the insertion of the guide 3. This is indicated by the arrow in fig. 4.1.

The assembly and insertion of the remaining guide 3 in the insertion opening 1.4 takes place in a similar manner to the previous embodiment, so reference is made here to the previous description.

Once one guide 3 is held in each cutout 1.2 on the carrier plate 1, the carrier plate 1 is displaced into the working position on the holding plate 2.

As can be seen in particular from fig. 5.1 and 5.2. In fig. 5.1 and 5.2, the holding plate 2 is deformed in a sandwich manner such that the carrier plate 1 is held between the upper side 2.3 and the lower side 2.4 of the holding plate 2. The upper side 2.3 and the lower side 2.4 have the same embodiment on their longitudinal sides, so that each side 2.3 and 2.4 has a profiled longitudinal edge 2.2 which is configured to coincide with the stop surface 3.4 of the guide 3. Fig. 5.2 shows how the stop surface 4.3 in the operating position rests on the longitudinal edges 2.2 of the side surfaces 2.3 and 2.4.

For fastening the guide 3 to the carrier plate 1, the separating web 1.7 has lateral projections 1.5 for limiting the friction slot 1.3 or the cutout 1.2, respectively. For this purpose, in the operating position shown in fig. 4.2, the guide 3 is held between the longitudinal edges 2.2 of the sides 2.3 and 2.4 and between the projections 1.5 on the separating web 1.7 of the carrier plate 1. The guide 3 is guided laterally by a holding groove 3.3 in the web 1.7.

The carrier plate 1 for guiding and fastening has two oblong holes 1.6 which are arranged on the end regions and are penetrated by the fastening element 4. The fastening part 4 is held by means of holes in the sides 2.3 and 2.4, wherein the fastening part 4 likewise secures the carrier plate 1 to the holding plate 2 by means of a screw fit. The fixing element 4 is identical to that of the previous embodiment and therefore reference is made to the previous description.

The device according to the invention for guiding a number of yarns can thus also be used for a considerable number of yarns which are guided as yarn packages, for example in a melt spinning process.

It should be clearly pointed out here that the embodiment of the fastening element is exemplary in terms of its structure and the guidance between the carrier plate 1 and the holding plate 2. Therefore, the carrier plate 1 may also be configured to be movable on the holding plate by other guide members and fixing members.

Claims

1. Device for guiding a plurality of yarns, the device having a plurality of exchangeable guides (3), each guide (3) having a guide slot (3.2) at which the yarns can be guided in a contacting manner, the device further having a carrier plate (1) for receiving the guide (3), wherein the carrier plate (1) has a plurality of cutouts arranged alongside one another on a longitudinal side (1.1), characterized in that the cutouts (1.2) have a plurality of insertion openings (1.4) for receiving the guides (3), the cutouts (1.2) have a plurality of friction slots (1.3) for positioning the guides (3), which friction slots communicate to the insertion openings (1.4) and are delimited by a plurality of projections (1.5) in the cutouts (1.2), the guides (3) each having an external holding slot (3) for guiding the carrier plate (1) in the friction slots (1.3) and the carrier plate (1) being arranged in a manner such that the carrier plate (1) can be displaced between the positions and the carrier plate (1) is held in a fixed manner.

2. Device according to claim 1, characterized in that the carrier plate (1) is displaceable relative to the holding plate (2) such that the insertion opening (1.4) of the cutout (1.2) remains open in the replacement position for insertion or removal of the guide (3).

3. The device according to claim 1 or 2, characterized in that each guide (3) has a stop surface (3.4) opposite the guide channel (3.2), and in that the stop surfaces (3.4) of the guide (3) interact with the anastomotic longitudinal edges (2.2) of the retaining plate (2).

4. Device according to claim 1 or 2, characterized in that the guide (3) is formed by a U-shaped component (3.1) made of ceramic material.

5. The device according to claim 1 or 2, characterized in that the holding plate (2) is constructed in a sandwich manner and that the carrier plate (1) is arranged between and displaceable between two sides (2.3,2.4) of the holding plate (2).

6. A device according to claim 3, characterized in that the holding plate (2) is constructed in a sandwich manner and that the carrier plate (1) is arranged between and displaceable between two sides (2.3,2.4) of the holding plate (2).

7. The device according to claim 6, wherein each side (2.3,2.4) has a longitudinal edge (2.2) that coincides with the stop surface (3.4) of the guide (3).

8. The device according to claim 1 or 2, characterized in that the spacing of the cutouts (1.2) on the carrier plate (1) is realized in a tight manner, such that the projections (1.5) are formed on thin separating webs (1.7), and adjacent separating webs (1.7) are formed in a mirror-symmetrical manner and are located in pairs between adjacent insertion openings (1.4).

9. The device according to claim 8, characterized in that adjacent separating webs (1.7) of the carrier plate (1) are of elastic construction, so that one of the guides (3) can be introduced into the respective friction slot (1.3).

10. The device according to claim 1 or 2, characterized in that the carrier plate (1) has at least two oblong holes (1.6) which are penetrated by a plurality of pins (4.1) of the holding plate (2) for guiding the carrier plate (1).

11. Device according to claim 1 or 2, characterized in that the carrier plate (1) and the holding plate (2) in the operating position are fixedly connected to each other by means of releasable fastening means (4).