JP2004156195A - Suction duct for fiber collector of spinning machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suction duct having mounting members easily detachable from suction openings, and to provide the mounting member. <P>SOLUTION: This suction duct for a fiber collector of a spinning machine has a pipe-shaped base body 4 and the mounting members 5 on each of spinning positions, wherein each of the mounting members has a sliding surface 13 which transports a fiber material to be collected, makes air pass through itself, and guides a transported band of the material. The base body 4 has the suction openings 8 on each of the spinning positions so that each of the suction openings is covered with the mounting member 5 corresponding thereto, and the mounting member 5 itself has a suction slot 14. The mounting member 5 is attachable to the suction opening 8 in a drawer-like state. <P>COPYRIGHT: (C)2004,JPO

Description

  The invention relates to a pipe-shaped base extending over a number of spinning points and a detachable mounting of the base on the basis of a C-shaped profile arranged at each spinning point and having two clip-shaped free legs. The base has a suction opening surrounded by a side boundary wall edge at each spinning point, and the individual mounting members each cover the associated suction opening, and Itself has a sliding surface suitable for guiding an air-permeable transfer band for the fibrous material to be focused on one of its free legs, the sliding surface having a suction slot; The present invention relates to a suction duct for a fiber concentrating device of a spinning machine.

  The invention further relates to a replaceable mounting member for use in such a suction duct.

  Immediately following the exit roller pair of the drafting device of the spinning machine, when a spinning is applied to the stretched fibrous structure, a so-called spinning triangle is created in the exit clamp (nip) line of the exit roller pair. Accordingly, the stretched fibrous structure having the predetermined width is twisted into a relatively small diameter yarn after the draft device. The spun triangles have edge fibers, which are not tightly bound to the twisted yarn and therefore contribute little or no strength to the spun yarn. Therefore, at a relatively early stage, a transition has been made to arrange a so-called gathering zone after the draft zone of the drafting device, and the gathering zone is a component of the fiber bundling device, and is itself a clip point on the outflow side. Is defined by Only then is the yarn twisted. The fibers converge or consolidate in the consolidation zone, so that when leaving the last clamping zone, the fibrous structure is so thin that the concerned spinning triangle has almost disappeared. The yarn spun in that case is more uniform, firmer and has less fiber burrs.

  A fiber concentrator with a collecting zone usually has a suction device with a suction duct extending over a number of spinning points, the suction device producing a respective suction air flow in the collection zone, and the suction air The flow causes or assists in the aggregation of the fibrous structure. This type of suction duct has for each spinning point a mounting member which covers the suction opening associated with the spinning point of the suction duct, each of the mounting members being driven by a sliding surface through the suction slot for air. Guide the transfer band through.

  A suction duct of the type mentioned at the outset is known from the prior art DE 100 36 786 A1. The suction duct is composed of a pipe-shaped base and a mounting member attached to each spinning point, and a steel band resistant to wear is provided for the mounting member. At a certain point, the base is covered. Abrasion resistant steel bands are biased and clamped springs having a C-shaped profile that closely contact the substrate and allow the suction opening of the substrate to be exposed to erroneous air. The seal is such that the compressed suction air flows only through the suction slot of the mounting member. This attachment allows for easy replacement without any auxiliary tools.

  However, it has been found that the resiliently biased steel band acting as a mounting member does not rest on the substrate so tightly that each erroneous air is prevented. Furthermore, the wrap angle of the C-shaped profile about the base must be large so that a more secure fixing based on the bias is possible.

  It is an object of the present invention to provide a suction duct and a mounting member which avoid the drawbacks mentioned above, can be mounted easily and interchangeably without respective auxiliary tools, and adhere to the substrate without excessive wrap angles. It is.

  The object is that the mounting member has, on its free leg with a sliding surface, a side groove circumscribed around it, by means of which the mounting member can be pulled out into the suction opening, The bottom of the groove is solved by forming an opposing surface corresponding to the boundary wall edge.

  The base is formed in a drawn-out shape so that it can be tightly covered on both sides of the suction opening from both the outside and the inside without the need for a separate sealing member. The mounting element, which is designed as a wear-resistant measure, is easily mounted on the substrate at the individual spinning points, and has a C-shaped profile, especially when the mounting element is made of plastic as an integral injection-molded part. Held by Since suction slots of various shapes are formed, an appropriate mounting member can be selected according to the fiber material to be spun. Furthermore, different surface structures are possible, adapted to the respective transfer band. The suction opening of the substrate itself does not require excessively complicated deburring. This is because the milling edge does not come into contact with the transfer band or with the fiber material to be spun.

  Preferably, the mounting member is mounted in the direction of travel of the fibrous material, the suction openings communicating therewith with slot-shaped insertion openings, each arranged transversely to the direction of travel of the fibrous material. The suction opening itself has, in the area of the end opposite the insertion opening, side border wall edges extending parallel to each other, at which corresponding opposing surfaces of the mounting member are located. Further adhere closely. The side border wall edge of the suction opening can have an introductory slope towards the insertion opening, which allows easy mounting of the mounting member. Further, the end of the suction opening opposite to the insertion opening can be formed such that it connects the side boundary wall edge perpendicular to the end boundary wall edge. Thus, here as well, the facing surface of the mounting member abuts the border wall edge.

  In order to better secure the mounting member, a notch can be formed in the border wall edge and an associated locking cam on the facing surface is associated with the notch. Thus, not only is the mounting member clamped on the basis of the C-shaped profile, but also the locking by means of a locking cam in the corresponding notch, whereby a kind of clip connection occurs.

  In a preferred form, the mounting member covers the respective insertion opening by its C-shaped profile and has in this region a turning radius smaller than the corresponding radius of the base. The spacing of the suction duct relative to the preceding drafting device roller pair is thus reduced, so that the drawn-out fibrous structure is better guided on the associated sliding surface.

  Furthermore, in the region of the insertion opening, on either side of the sliding surface, border walls for guiding the transfer band can be provided. This guide of the transfer band is easily injection-moulded as a lateral ridge, possibly eliminating the need for another transfer band guide.

  Due to the mounting element, the profile of the individual sliding surfaces is somewhat raised above the associated surface of the unmounted element. This means that, in a preferred form of the invention, the sliding surface is formed so as to become progressively narrower in the direction of travel of the fibrous material, so that it is slightly narrower in the narrow area than the corresponding transport band. , Making it possible. Therefore, it is possible to make the transfer band protrude slightly beyond the mounting member on the side, and to further form the clamp roller itself, which defines the gathering zone, slightly wider than the transfer band, so that the clamp roller is mounted on the mounting member or the substrate. Does not come into contact with the surface.

  Replaceable mounting members for use for the suction duct described above shall also be included in the scope of protection, the mounting members being provided on the free leg with a sliding surface, provided with a groove circumscribed therearound. When the mounting member is mounted on the suction duct at the bottom of the groove, the boundary wall edge of the suction opening formed therein can be associated with the mounting member.

  Other advantages and features of the invention will become apparent from the following description of embodiments.

  The perspective view according to FIG. 1 shows a part of a suction duct 1 for a fiber concentrator of a spinning machine, in particular a ring spinning machine. Such a suction duct 1 extends over a number of spinning points, only two of which are indicated by the reference numerals 2 and 3. The suction duct 1 has a pipe-shaped base body 4 on which a mounting member 5 is mounted during operation, only one of which is mounted in FIG. This mounting member 5 can preferably be formed as an integral injection-molded part.

  The individual mounting member 5 has a C-shaped profile and therefore has two free legs 6, 7 in the form of a clip, the mounting member being mounted on the base 4 with an oval cross section by its free legs. Over and clamped. The substrate 4 has an uneven suction opening 8 milled at each spinning point 2, 3, the dimensions of the suction opening 8 being greater than required for bundling the fiber material. It is much wider. Each suction opening 8 is surrounded by two side border wall edges 9, 10, a rear border wall edge 11 and a front border wall edge 12. The individual mounting members 5 cover the individual suction openings 8 during operation and themselves have, on their outer contours, a sliding surface 13 for the transfer band described below. Within each sliding surface 13 is formed an elongate suction slot 14, which provides or aids the gathering of the fibrous material.

  As will be described below, the individual mounting members 5 can be drawn out over the suction opening 8 and, in the representation of FIG. 1, from bottom to top.

  FIGS. 2 and 3 schematically show a fiber convergence device provided at each of the spinning points 2, 3,... Of a spinning machine, preferably a ring spinning machine. The spinning machine has a draft device 15 only partially shown for each of the spinning points 2, 3,..., Of which only the exit roller pair 16 and the preceding apron pair 17 are shown. I have.

  The outlet roller pair 16 has an under roller 18 formed as a driven under cylinder that rotates in the machine longitudinal direction, and the under roller is provided with a pressing roller 19 at each of the spinning points 2, 3,. ing. The under roller 18 and the pressing roller 19 together form an exit clamp line 20 that terminates the draft zone of the draft device 15. A fiber material 21 in the form of a sliver or a roving is supplied to the draft device 15 in the transport direction A, and is stretched to a desired fineness in a known manner in the draft device 15. Following the exit roller pair 16 of the drafting device 15, a collecting zone 22 is provided, in which the stretched but untwisted fibrous structures 23 are converged or collected. . The fiber concentrator provided for this purpose has an air-permeable transfer band 24, which transfers the fiber structure 23 through the consolidation zone 22. The transfer band 24 is formed as a thin, fine mesh woven band, preferably of plastic thread.

  The outlet end of the gathering zone 22 is defined by a clamping point 25, which is also used as a turning prevention, so that the fibrous structure 23 in the gathering zone 22 remains unrotated. Continuing at the clamping point 25, a yarn 26 is produced, which is fed in a feed direction B to a swiveling mechanism, not shown, for example a ring spindle, where it is twisted.

  The fiber bundling device furthermore has a suction device with a suction duct 1 already described, which suction duct extends over a number of, for example eight, spinning points 2, 3,. Since it is connected to a negative pressure source (not shown) via the part 27, the suction duct 1 is generally under negative pressure when it is driven. The suction duct 1 is provided with a suction opening 8 for each of the spinning points 2, 3,.

  Each individual suction opening 8 is covered by a replaceable mounting member 5, the outside of which is partially formed as a sliding surface 13, the sliding surface of which slides over it. Guide the band 24. Arranged in the sliding surface 13 of each mounting member 5 is a suction slot 14 extending substantially in the transport direction A and surrounded on all sides in a window-like manner, the suction slot being provided by an air-permeable transfer band 24. It is covered and extends approximately to the clamping point 25. As can be seen from FIG. 3, the suction slots 14 are arranged slightly oblique to the direction of movement of the transfer band 24.

  To provide the required pivot stop at the clamping point 25, a clamping roller 28 is provided, which drives the transfer band 24 and transfers the textile structure 23 to the transfer band 24 and at the same time the transfer band 24. It is pressed against the sliding surface 13 of the mounting member 5 with a predetermined pressing force. The clamp roller 28 itself gets its drive from the pressure roller 19 of the drafting device 15 via a toothed belt 29 or other transmission means.

  Each transfer band 24 leaves the sliding surface 13 on the side opposite the suction slot 14 and is guided there by a tensioning device 30.

  It can be seen that on the individual sliding surfaces 13 where the transported transfer band 24 slides on the fixed component there is a certain wear on both the transport band 24 and the suction duct 1. The wear of the transfer band 24 is not a problem. This is because a large number of transfer bands can be formed inexpensively and can be easily replaced. What is more problematic, however, is the wear in the suction duct 1, which is not provided on the base body 4 but on the mounting member 5 associated with the spinning points 2, 3,. Be overcome by being. These mounting members 5 should be easily replaceable and likewise inexpensive to form, but the suction opening 8 of the base 4 is also incorrect, so that the suction air to be compressed flows only through the suction slot 14. Must seal against air.

  In addition to FIGS. 1 to 3 which have been described so far, FIGS. 4, 5, 6 and 7, the structure of the individual mounting members 5 and the associated suction openings 8 will be described in detail below.

  Each mounting member 5 has a groove 31 on three sides of the free leg 6 including the sliding surface 13, by means of which the mounting member 5 can be mounted in a drawer-like manner on the suction opening 8. The lateral groove 31 is of such a depth that the associated opposing surface 32 of the mounting member 5 is as close as possible to the boundary wall edges 9, 10, 11 of the associated suction opening 8. The fact that the opposing surface 32 and the surface of the base 4 are tightly covered from both the outside and the inside by the mounting member 5 prevents the inflow of erroneous air from the beginning. Suction air can only enter through the suction slot 14, which significantly improves efficiency.

  As already explained, the mounting member 5 can be mounted in the running direction A, B of the fibrous material 21 so as to cover the suction opening 8, so that the suction opening 8 is moved in the running direction A, B respectively. And communicates with a slot-shaped insertion opening 33 arranged in the lateral direction. This insertion opening 33 is covered by the direction changing part of the C-shaped profile of the mounting member 5 present at this point. In the region of the end 34 of the suction opening 8 opposite the insertion opening 33, side border wall edges 9, 10 are provided which extend parallel to one another. Thus, in this region, the facing surface 32 is very close to the side boundary wall edges 9,10. Introducing slopes 35, 36 are provided at the side border wall edges 9, 10 towards the insertion opening 33, which enable the mounting member 5 to be easily mounted on the base 4. The suction opening 8 has a defining edge at an end 34 opposite the insertion opening 33, the defining edge being formed as a terminal edge 11 and a side boundary wall edge 9. , 10 are connected vertically. Thus, here again, the opposing side surface 32 is in close contact with the end border wall edge 11.

  In order to better fix the mounting member 5 on the base body 4 in addition to the C-shaped profile, notches 37, 38 are further formed in the side boundary wall edges 9, 10, into which the mounting members are inserted. Some kind of clip connection is provided such that the locking cams 39, 40 of the associated opposing surface 32 of the 5 fit. Therefore, the attachment member 5 cannot be inadvertently displaced from the base 4.

  7, the radius 41 of the base 4 in the region of the insertion opening 33 is larger than the direction changing radius 42 of the mounting member 5. This makes it possible for the mounting member 5 or its direction-changing radius 42 to be introduced very closely into the wedge gap of the outlet roller pair 16, see also FIG. This is also effective for the fiber structure 23 to move from the exit clamp line 20 of the draft device 15 to the sliding surface 13.

  The mounting member 5 is preferably formed as a one-piece injection-molded part, so that in the area of the insertion opening 33 the sliding surface 13 is further provided with side boundary walls 43, 44, whereby the transfer band 24 is actuated during operation. There is no difficulty in being guided sideways.

  As is particularly apparent from FIG. 3, the sliding surface 13 is gradually narrowed in the running directions A and B of the fiber material 21 so as to be slightly narrower than the corresponding transfer band 24 in the narrowed area 45. Is formed. Thereby, it is achieved that the clamping roller 28 is slightly wider than the transfer band 24, which is evident from FIG. Nevertheless, there is no danger of the clamp roller 28 coming into contact with the fixed surface of the suction duct 1.

  In the enlarged perspective view shown in FIG. 8, the individual mounting members 5 are shown from below. Two free legs 6, 7 for the C-profile are recognized, in which case the free leg 6 has a sliding surface 13 with a suction slot 14. The figure further shows a part of the groove 31 wrapped around and the opposing surface 32 formed by the above-mentioned boundary wall edges 9, 10, 11 of the suction opening 8 of the base body 4. ing. A locking cam 40 is formed on the facing surface 32. On the left side of FIG. 8, a small turning radius 42 for the transfer band 24 and a side interface for guiding the transfer band 24 can be seen. In the display shown in FIG. 8, the narrow region 45 in FIG. 3 is not shown.

  As can be seen, two inner surfaces 46 and 47 are formed by the circumferential groove 31 provided in the mounting member 5, the spacing of which is adapted to the wall thickness of the substrate 4, whereby the mounting The member 5 can be brought into close contact with the surface of the base 4 in the region of the suction opening 8 from both inside and outside. In the region of the insertion opening 33, the suction opening 8 is tightly covered by a C-shaped profile curve 48.

FIG. 1 is a perspective view, in somewhat enlarged original dimensions, of a suction duct extending over a number of spun points, with only two of the spun points indicated, and one suction opening of the substrate being Without a mounting member, the adjacent suction opening is covered by a mounting member with a suction slot according to the invention. FIG. 2 is a side view showing the fiber bunching device of the spinning machine partially cut away. FIG. 3 is a view in the direction of arrow III in FIG. 2, with some components, especially rollers, being omitted for clarity. FIG. 4 is a cross-sectional view showing a slightly enlarged wall of the suction duct along the cut plane IV-IV in FIG. FIG. 5 is a cross-sectional view similar to FIG. 4, taken along section plane VV in FIG. FIG. 6 is a sectional view similar to FIGS. 4 and 5, taken along section plane VI-VI of FIG. FIG. 7 shows a greatly enlarged part of FIG. 2 to show the area of the suction slot. FIG. 8 is an enlarged perspective view showing the mounting member from below.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 ... Suction duct 4 ... Base 5 ... Mounting member 8 ... Suction opening 9, 10, 11 ... Boundary wall edge 13 ... Sliding surface 14 ... Suction slot 24 ... Transfer band 32 ... Opposing surface

Claims (15)

A pipe-shaped base extending over a plurality of spinning points, and a mounting member disposed at each spinning point and removably attached to the base based on a C-shaped profile with two clip-shaped free legs. The substrate has at each spinning point a suction opening surrounded by a side boundary wall edge, and the individual mounting members each cover the associated suction opening, and the mounting member itself is A spinning machine having a sliding surface suitable for guiding an air-permeable transfer band for the fiber material to be focused on one of its free legs, said sliding surface having a suction slot; In the suction duct for the fiber concentrator of
The mounting member (5) has, on its free leg (6) having a sliding surface (13), a side groove (31) circumscribed by which the mounting member (5) allows the suction opening ( 8) A fiber concentrating device for a spinning machine, characterized in that the groove bottom forms an opposing surface (32) corresponding to the boundary wall edges (9, 10, 11). For suction duct.   The mounting member can be mounted in the running direction (A, B) of the fibrous material (21), so that the suction opening (8) is respectively in relation to the running direction (A, B) of the fibrous material (21). Suction duct according to claim 1, characterized in that it communicates with a laterally arranged slot-shaped insertion opening (33).   The suction opening (8) has side boundary wall edges (9, 10) extending parallel to each other at an end (34) opposite the insertion opening (33). The suction duct according to claim 2.   Suction duct according to claim 3, characterized in that the side border wall edges (9, 10) have an inlet ramp (35, 36) towards the insertion opening (33).   The end (34) of the suction opening (8) opposite to the insertion opening (33) is arranged perpendicular to those boundary walls joining the side boundaries (9, 10). Suction duct according to claim 3 or 4, characterized in that it is formed as an end border wall edge (11).   Notches (37, 38) are formed in the side boundary wall edges (9, 10), and locking cams (39, 40) are associated with the opposing side surfaces (32) associated with the notches. The suction duct according to any one of claims 3 to 5, characterized in that:   The mounting members (5) each cover an insertion opening (33) by its C-shaped profile, and in this area a corresponding radius (41) of the substrate (4) for the associated transfer band (24). 7. The suction duct according to claim 2, wherein the suction duct has a reduced turning radius compared to the suction duct.   Suction duct according to claim 1, wherein the mounting member is formed as an integral injection-molded part.   9. The sliding surface (3) is provided with side boundary surfaces (43, 44) for guiding the transfer band (24) in the region of the insertion opening (33). Suction duct.   In the running direction (A, B) of the fibrous material (21), the sliding surface (13) becomes gradually narrower in the constricted area (45) so as to be slightly narrower than the corresponding transfer band (24). The suction duct according to claim 1, wherein the suction duct is formed. A C-shaped profile with two clip-shaped free legs,
A sliding surface arranged on one free leg for guiding a transfer band for the fiber material to be bundled;
A suction slot disposed in the sliding surface, the interchangeable mounting member for use in a suction duct for a fiber concentrator of a spinning machine;
A free leg having a sliding surface (13) is provided with a side groove (31) circumscribed therearound, formed when the mounting member (5) is mounted on the suction duct (1). A replaceable mounting member, characterized in that the boundary wall edges (9, 10, 11) of the suction opening (8) can correspond to the groove bottom of the groove.   The mounting member according to claim 11, wherein a locking cam (39, 40) is formed at a groove bottom.   13. The mounting member according to claim 11, wherein the sliding surface (13) is provided with side boundary surfaces (43, 44) for guiding the transfer band (24).   14. The mounting member according to claim 11, wherein the sliding surface is formed so as to be narrow in a traveling direction of the transfer band. 15.   15. The mounting member according to claim 11, wherein the mounting member is formed as an integral injection-molded part.

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