JP2017222968A - Slab yarn production equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slubbing device in order to more functionally and more reliably form a slub.SOLUTION: A device according to the present invention comprises: a linear element (7) extending across a yarn path; and at least one yarn releasing slide for releasing a yarn (F), comprising a yarn slide surface (9A) which extends from the linear element (7) and is inclined with respect to the linear element (7). In addition, the device has a cursor (11) which is movable parallel to the linear element (7) and is configured so as to push the yarn along the inclined yarn slide surface (9A) of the yarn releasing slide. The linear element (7) has a longitudinal groove (8) parallel to a longitudinal extension part thereof. The yarn slide surface (9A) of the yarn releasing slide extends inside the longitudinal groove (8).SELECTED DRAWING: Figure 3

Description

  The present invention relates to the field of yarn manufacturing. More specifically, the embodiments described in this specification relate to improvements in slab yarn production equipment.

  In the textile industry, new yarns are continually being developed to obtain specific technical and aesthetic effects. In the textile technology, it is well known to produce so-called decorative slabs called “slabs”, which are stored in an accumulation area, i.e. irregular in thickness, using a suitable slab processing device or unit. It is a thread that has been given sex. Slab processing devices are disclosed, for example, in EP 299131, US Pat. No. 6,820,405 and US Pat. No. 4,368,612. These devices are arranged along a yarn supply track, periodically picking up the yarns in order periodically, correcting and extending the track. Once the yarn trajectory is extended, the yarn is released, creating a buildup that creates a slab effect in the finished product.

  In order to obtain an accurate supply of yarn along the trajectory towards the winding area, the slab processing device should not make the supply irregular, for example should not accidentally pinch the yarn. From this point of view, prior art slab processing equipment has proven to be inadequate.

  A particularly efficient yarn slab processing apparatus is disclosed in International Publication No. WO-A-2009 / 033697. The device comprises a slider, ie a cursor, fixed to an endless belt. The endless belt periodically moves the cursor along a closed track with a linear active portion extending perpendicular to the yarn supply track. The cursor is configured to catch the yarn while moving along the active portion of the track and pull the yarn in the lateral direction of the linear yarn supply track. A thread deflection member in the form of a slide is arranged at the end of the linear active part of the closed track. The yarn deflection member cooperates with the cursor to release the yarn from the cursor while the cursor passes through the deflection member, so that the yarn returns to its normal linear trajectory. The deflection member includes a thread slide surface, and the slide surface extends in a direction away from the cursor trajectory. While moving toward the yarn deflecting member under the action of the cursor, the yarn can accidentally be trapped or pinched between the endless belt and the deflecting member. Thus, the slab processing device has proven to be insufficient from the point of view of yarn supply.

  Accordingly, there remains a need to improve slab processing equipment to form slabs more functionally and more reliably.

European Patent No. 299131 US Pat. No. 6,820,405 U.S. Pat. No. 4,368,612 International Publication WO-A-2009 / 033697

To solve or mitigate one or more problems of prior art slab processing equipment,
A linear element extending across the yarn track;
A slide for releasing the thread, i.e. a deflecting member, comprising a thread slide surface extending from and inclined with respect to the linear element;
Yarn slab machining with a cursor, i.e. a slider, preferably with reciprocating motion, movable parallel to the linear element and configured to push the yarn along the sloping surface of the slide releasing the yarn An apparatus is provided.
Advantageously, the linear element comprises a longitudinal groove parallel to the longitudinal extension of the linear element,
The slide surface of the slide releasing the thread extends inside the longitudinal groove, i.e. passes through it.

  The thread slide surface is tilted with respect to a linear element that forms an angle greater than 90 ° with it, allowing the thread to travel along the thread slide surface, and thus until the thread is released from the cursor. It is adapted to be pushed along the thread slide surface.

  In general, a linear element is a component having a longitudinal dimension that is substantially greater than the transverse dimension, such as a bar, stick or rod. In this specification, linear elements will be simply indicated using the term “rod”.

To facilitate thread sliding, the rod may be formed of a ceramic material, such as aluminum oxide (Al ₂ O ₃ ), titanium dioxide (TiO ₂ ), zirconium oxide (ZrO ₂ ).

  In another example, the rod may be formed of a special steel that has been surface treated to increase hardness and reduce coefficient of friction.

  Further features and embodiments of the yarn slab processing device according to the invention are described below and in the appended claims forming an integral part of this application.

It is a front view of the thread | slab slab processing apparatus in the Example which can be implemented. It is a top view according to the II-II line of FIG. FIG. 3 is an axonometric view of the apparatus of FIGS. 1 and 2. FIG. 4 is a detailed enlarged view of a portion indicated by a symbol A in FIG. 3. It is the same front view as FIG. 1 of the thread | slab slab processing apparatus in another Example. It is a top view according to the VV line of FIG. FIG. 6 is an axonometric view of the apparatus shown in FIGS. 4 and 5. FIG. 7 is a detailed enlarged view of a portion indicated by a symbol A in FIG. 6.

  The present invention will be better understood by reading the following description and the accompanying drawings. The following description and the annexed drawings illustrate non-limiting practical embodiments of the invention.

  Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. The same reference numbers in different drawings identify the same or similar elements. In addition, the drawings are not necessarily drawn to scale. Also, the following detailed description does not limit the invention. Instead, the scope of the invention is defined by the appended claims.

  The terms “one embodiment,” “one embodiment,” or “some embodiments” referred to throughout the specification refer to specific characteristics, structures, or features described with respect to one embodiment from the disclosed components. Is included in at least one embodiment. Thus, the terms “in one embodiment”, “in one embodiment” or “in several embodiments” used in various parts throughout the specification are not necessarily referring to the same embodiment. Furthermore, the particular properties, structures, or characteristics may be combined with any suitable method in one or more embodiments.

  1 to 3 and 3A, a first embodiment of a yarn slab machining apparatus denoted as a whole by reference numeral 1 will be described. The yarn slab processing device 1 may be a composite structure, i.e. consist of a plurality of identical sections arranged in sequence so as to process yarns fed in parallel. Hereinafter, only one section of the slab processing apparatus 1 will be described.

  The slab processing apparatus 1 includes a pair of threaded guide members 3 and 5 that are substantially coaxial with each other, and through which the yarn F is guided. The linear element 7 is associated with the threaded guide members 3, 5. The linear element 7 is in the form of a rod, i.e. a bar, and extends approximately perpendicular to the trajectory of the thread F defined by the two coaxial threaded guide members 3, 5. The linear element 7 will be described in a simplified form as “rod 7” below.

  The rod 7 has a longitudinal groove 8. In the illustrated embodiment, the longitudinal groove 8 extends along the larger dimension of the rod 7 over the entire length of the rod 7. In another embodiment, as will become apparent from the following description, the longitudinal groove 8 can extend only over a portion of the total length of the rod 7.

  The rod 7 extends between the threaded guide members 3 and 5 and the slide 9, and the slide 9 is provided with an edge 9A that forms a slide surface for the thread F, the purpose of which will be described below. As particularly shown in the enlarged view 3A, the slide 9 is arranged such that the slide surface 9A for the yarn F is inclined with respect to the longitudinally extending portion of the rod 7, and the slide surface 9A is Together with the longitudinal extension, an angle α (see FIG. 2) greater than 90 ° is formed. Further, the slide surface 9A extends into the groove 8. As long as the slide 9 is sufficient to protrude into the groove 8 as shown in the drawing, the length of the groove 8 may be shorter than the longitudinal extension of the rod 7.

  The cursor, i.e. the slider 11, is associated with the rod 7 and is given a reciprocating linear motion according to a double arrow f <b> 11 parallel to the longitudinal extension of the rod 7. The cursor, i.e., slider 11, can be coupled to an actuator that provides reciprocating motion to slider 11. According to some embodiments, the slider 11 can be fixed to a bar 13 that can reciprocate according to, for example, f11, said bar 13 being controlled by an electric motor, for example, to move the cursor 11. . In the case of a compound device, the same bar 13 can support a plurality of cursors 11.

  The bar 13 can be parallel to the rod 7.

  In another embodiment, the cursor or slider 11 can be coupled to a flexible member, for example, a belt or chain such as an endless belt or chain. The flexible member can be controlled by a motor that imparts reciprocating motion thereto. In yet another embodiment, the actuator may provide continuous motion to the slider or cursor 11 along a closed trajectory. A closed trajectory may have a linear active portion and a return portion. The straight active part may be parallel to the rod 7. The slider 9 and the two threaded guides 3, 5 can be arranged at or near the end of the linear active part of the closed track along which the slider, ie the cursor 11, is moved.

  In the illustrated embodiment, the cursor 11 includes two members 11A and 11B that engage with the thread F. One of these two thread engaging members is disposed on the rod 7, and the other is disposed below the rod 7.

  As shown in FIGS. 1 and 2, a single cursor 11 is associated with each pair of threaded guides 3, 5 and each slide 9. 1-3, the cursor 11 is shown in an intermediate position along its stroke parallel to the rod 7. In essence, the cursor 11 reciprocates from a first position on the left (in the drawing) of the pair of threaded guides 3, 5 to a second position on the slide 9 as shown in FIG. 3A. The cursor 11 projects in a direction perpendicular to the rod 7 toward the trajectory of the thread F defined by the threaded guides 3 and 5. In this method, when the cursor 11 moves from the first position toward the second position, the thread F supplied through the threaded guides 3 and 5 is engaged by the cursor 11, and the thread F is directed toward the slide 9. Be pulled. In this method, the trajectory of the yarn F is extended. The yarn F is placed on the two yarn engaging members 11A and 11B and pulled toward the yarn deflecting member formed by the slide 9. During this operation, the thread positioned between the two thread engaging members 11A and 11B can slide along the rod 7 while moving toward the slide 9. The material forming the rod 7 has a low coefficient of friction (like ceramics and special steel) so that the thread can easily slide on it.

  When the cursor 11 reaches near the second position (see FIG. 3A), the portion of the yarn F between the two thread engaging members 11A and 11B comes into contact with the inclined surface 9A defined by the slide 9. As the cursor 11 continues to move toward the slide 9, the thread F is pushed and slides along the thread slide surface 9A, and thus moves away from the rod 7. The movement of the cursor 11, the length of the thread slide surface 9A, and the dimensions of the two thread engaging members 11A and 11B are such that the thread F is released from the thread engaging members 11A and 11B by the effect of sliding. Yes. Actually, the slider, that is, the thread slide surface 9A of the thread deflection member 9 extends in a direction away from the rod 7 rather than the cursor 11, and the slide of the thread along the thread slide surface 9A under the operation of the cursor 11 The cursor 11 is finally moved in a direction away from the rod 7 by the extension part exceeding the length protruding from the rod 7. Once released from the cursor 11, the thread F returns to its original position that defines the straight portion between the threaded guides 3,5.

  Thereafter, the cursor 11 returns to the first position in order to repeat the above-described operation. The two members 11A, 11B of the cursor 11 have edges that are inclined with respect to the direction f11 and exceed the position of the thread F when the thread F extends linearly between the threaded guides 3, 5. To be able to move.

  This reciprocating linear movement of the cursor 11 causes the yarn to be repeatedly stretched along its path, thereby producing a slab in the yarn downstream of the slab processing device 1 in a known manner.

  4-6 and 6A show another embodiment. The same reference numerals denote the same or equivalent members as those described with reference to FIGS. 4-6, the cursor 11 or slide is symmetrical, moves between two slides 9X, 9Y that are symmetrical to each other and spaced apart from each other along the extension of the rod 7. The two threaded guides 3, 5 are arranged at an intermediate position, substantially equidistant from the two slides 9X, 9Y.

  In both embodiments, the structure of the slides 9, 9X, 9Y having the slide surface 9A protruding into the groove 8 of the rod 7 is such that the thread F is caught or entangled between the rod 7 and the cursor 11. And make the operation of the device more regular. For this purpose, in the configuration of both embodiments, it is sufficient that the groove 8 extends from the slide towards the area along which the cursor 11 moves, so that the groove 8 extends over the entire length of the rod 7. There is no need to stretch. In the double structure, that is, in the structure in which the two slides 9X and 9Y are arranged in a mirror shape, the groove 8 can have two groove parts at the level of the slide, and the central part of the rod 7 has no groove. Also good. However, it may be manufacturable to produce a rod 7 of constant cross-section, and thus a rod 7 with a groove 8 extending over the entire length of the rod 7.

  Actually, by arranging the slide surface 9A of the slide (yarn deflecting member) 9 so as to partially extend into the groove 8 of the rod 7, the yarn is captured, pinched or clamped. A continuous thread slide surface is formed without any possible entanglement. Yarn supply is smoother.

  In order to give the yarn an irregular slab effect, the cursor 11 can move with a non-periodic movement, i.e. its speed can be changed. For this purpose, the distance between the threaded guides 3, 5 can also be varied.

Claims (12)

A linear element (7) extending across the yarn trajectory;
At least one thread release slide (9 :) for releasing the thread (F), comprising a thread slide surface (9A) extending from the linear element (7) and inclined with respect to the linear element (7); 9X, 9Y)
A cursor (11), which is movable parallel to the linear element (7) and configured to push the thread along the slanted thread slide surface (9A) of the thread release slide (9: 9X, 9Y), and Prepared,
Said linear element (7) has a longitudinal groove (8) parallel to its longitudinal extension, and
The apparatus for producing a slab yarn (F), wherein the yarn slide surface (9A) of the yarn release slide (9) extends inside a longitudinal groove (8). The device according to claim 1, characterized in that the cursor (11) moves in a reciprocating motion parallel to the linear element (7). Device according to claim 1 or 2, characterized in that the cursor (11) is connected to an actuating member adapted to impart movement to the cursor (11). The actuating member comprises a bar (13) to which the cursor (11) is fixed;
Device according to claim 3, characterized in that the bar (13) reciprocates parallel to the linear element (7). The device according to claim 1, wherein the linear element is made of a ceramic material. The linear element (7) is formed of a material selected from the group consisting of aluminum oxide (Al ₂ O ₃ ), titanium dioxide (TiO ₂ ), and zirconium oxide (ZrO ₂ ). 5. The apparatus according to 5. The apparatus according to any one of claims 1 to 4, wherein the linear element (7) is made of a special steel that has been subjected to a surface treatment that increases hardness and decreases its coefficient of friction. . The cursor (11) includes two members (11A, 11B) that engage with the thread (F),
The two members (11A, 11B) are arranged on both sides of the linear element (7);
The linear element (7) has a longitudinal groove (8) arranged at an intermediate position between the two members (11A, 11B) engaged with a thread (F). The apparatus as described in any one of -7. 9. A device according to any one of the preceding claims, characterized in that the longitudinal groove (8) extends over the entire length of the linear element (7). With two thread release slides (9X, 9Y)
Each thread release slide is provided with a thread slide surface (9A),
Two thread release slides (9X, 9Y) are arranged in a mirror-like position spaced apart from each other along the linear element (7),
Each thread release slide extends into the longitudinal groove (8),
10. A device according to any one of the preceding claims, characterized in that the cursor (11) reciprocates from one of the two thread release slides to the other. A pair of substantially concentric threaded guides (3, 5) are arranged to define a thread track substantially perpendicular to the linear element (7). The apparatus as described in any one of -10. A pair of substantially concentric threaded guides (3, 5) are arranged to define a thread trajectory substantially perpendicular to the linear element (7);
11. A device according to claim 10, characterized in that the pair of threaded guides (3, 5) are arranged in an intermediate position between two thread release slides (9X, 9Y).

Images