JP2006508260A - A device for producing spun yarn, including a swivel mounted and removable air jet device - Google Patents

Abstract

An apparatus for producing spun yarn from staple fiber strands includes an air jet assembly, which is disposed downstream of a delivery device for staple fiber strands. The air jet assembly is disposed in the holding device, and the holding device can be swung together with the air jet assembly about the swivel axis in a direction away from the delivery device. The holding device and the pivot axis are designed so that the holding device can be removed laterally from the pivot axis after it has been pivoted at a predetermined pivot angle together with the air jet assembly.

Description

  The present invention is an apparatus for producing spun yarn from staple fiber strands, including an air jet assembly disposed downstream of a staple fiber strand delivery device, wherein the air jet assembly is disposed on a holding device. And the holding device can be swung together with the air jet assembly around the swivel axis in a direction away from the delivery device.

  A device of this type is prior art in German patent DE 4020049C2. This known air jet assembly is arranged on a swivelable holding device in such a way that it can be swung from a straight line to a side at an angle of approximately 30 ° from the delivery device for cleaning or maintenance purposes. Has been. This publication does not contain any details regarding the assembly of the holding device on the pivot axis.

  The object of the present invention is not only to swivel the air jet assembly away from its operating position in a direction away from the delivery device, but additionally to disassemble the air jet assembly from the swivel axis without the aid of any tools. Is to be able to do it.

  This object is designed according to the invention in such a way that the holding device and the swivel shaft can be removed laterally from the swivel shaft at a predetermined swivel angle together with the air jet assembly. Was achieved.

  A basic solution for this type of removal of the holding device from the pivot axis is disclosed in German published patent application 4304088. Embodiments in accordance with the present invention allow simple disassembly without the aid of any tool while allowing a secure fixation of the air jet assembly to the delivery device during operation.

  A continuous swivel axis need not necessarily be applied. Rather, in embodiments of the present invention, the pivot axis can include two axis journals, each of which is located on its own support stand. This is not only practical with respect to symmetry, but also does not require a separate axial fixation of the pivot axis.

  When the pivot axis includes an external contour that is partially designed as a cylindrical surface in a known manner that is broken in a secant manner by at least one flat surface, and the holding device comprises a bifurcated catch A hollow cylindrical complementary surface adapted to the cylindrical surface in the bifurcated base part, where the capture part is smaller than the diameter of the cylindrical surface but larger than the distance from the outer contour of the pivot surface of the flat surface It is particularly advantageous when having a width. The position of the flat surface determines the swivel angle at which the air jet assembly can be removed laterally from the swivel axis together with the holding device. Disassembly in the operating position is thus effectively prevented.

  In a further embodiment, the cylindrical surface of the outer contour can be broken in a secant manner by two flat surfaces arranged parallel to each other. The distance between the two flat surfaces from each other is smaller than the opening width of the bifurcated trap. This allows reliable guidance by means of two guiding surfaces as a whole on the pivot axis of the holding device during assembly.

  In order to provide quick alignment of the air jet assembly towards the delivery device in operation, a stopper that is fixed in the operating position is arranged at a distance from the pivot axis on the air jet assembly. This stopper, or the support surface of the air jet assembly disposed thereon, includes a magnet for the purposes of the present invention, which allows a secure fixation of the air jet assembly in its operating position in a simple manner.

BRIEF DESCRIPTION OF THE DRAWINGS These and further objects, features and advantages of the present invention will become more readily apparent from the following detailed description taken in conjunction with the accompanying drawings. In the drawing:
1 is a partial cross-sectional side view of a device according to the invention in an operating position;
2 is a diagram of the device in the direction of arrow II in FIG.
FIG. 3 is a perspective view of a holding device applied to the device according to FIG.
FIG. 4 is a perspective view of a support stand including a pivot shaft arranged in the holding device,
FIG. 5 is a view similar to FIG. 1, but in which the air jet assembly has been swung away from the device from its operating position to the disassembly position,
FIG. 6 is the view as shown in FIG. 5 after the air jet assembly has been removed laterally from the pivot axis along with its holding device.

  The apparatus shown in FIG. 1 in the operative position includes a delivery device 1 for supplying staple fiber strands to be spun as well as an air jet assembly 5, where the staple fiber strands provide the necessary twist to spin the yarn. It is done.

  The delivery device 1 comprises two delivery rollers 2 and 3, which are arranged at a short distance upstream of the air jet assembly 5, these rollers 2 and 3 being the front rollers of a drafting device not otherwise shown. Can be. This type of drafting apparatus drafts sliver or roving supplied in a known manner into staple fiber strands of the desired fineness. The delivery device 1 can alternatively be another drafting device or another type of assembly of nipping roller pairs arranged in the front. The nipping line is indicated by the numeral 4 where staple fiber strands (not shown) fed in the delivery direction A are nipped before they enter the air jet assembly 5.

  The design of the air jet assembly 5 can be selected as desired, but it will twist the spun yarn (not shown) and draw the yarn by a pair of draw rollers (not shown). Send in direction B. The air jet assembly 5 can be designed according to European published patent application 1217109.

  An air jet assembly 5 according to the publication mentioned above comprises a supply passage 6 which guides the staple fiber strands into a vortex chamber 7 through which an air supply nozzle (not shown) passes, And it produces spinning twist. The supplied compressed air is then discharged in the form of a circular ring via an air discharge duct 8 that surrounds the stationary spindle-like element 10, in which a yarn withdrawal passage 9 for spun yarn is located. . A twist block 11 is advantageously provided immediately upstream of the entrance to the yarn withdrawal passage 9, which can be formed, for example, by the edge of the fiber guide surface 12. This type of air jet assembly 5 is well known and can be designed differently for the embodiments described herein.

  As can be seen in FIG. 1, the air jet assembly 5 can be arranged in a holding device 13 which, together with the air jet assembly 5, around the pivot axis 14 when required. It can be swung away from the delivery device 1. This may be necessary, for example, in the case of maintenance or for disassembly purposes according to the invention. The provided embodiment of the holding device 13 in this case and the pivot 14 are both described in more detail below. At this point, the pivot 14 is placed on two support stands, the only support stand 15 being visible in FIG. 1, and the support stand has a bore 16 to secure them to the machine frame. It should be stated that it is equipped.

  In order to set the operating position of the air jet assembly 5 with respect to the delivery device 1, a stopper 17 is provided, which is advantageously arranged in an adjustable manner on a machine frame at a distance from the pivot axis 14. The stopper 17 is adjustable. The stopper 17 or the support surface 19 of the air jet assembly 5 can include magnets 18 to ensure quick and reliable fixation.

  It can be seen from the view shown in FIG. 2 that the pivot shaft 14 includes two shaft journals 20 and 21, the design of which is described in more detail below. One shaft journal 20 is applied to the support stand 15 described above, and the other shaft journal 21 is applied to the second support stand 22. Both support stands 15 and 22 are fixed to the machine frame 23 by the bore hole 16 described above. The holding device 13 is assigned to both the shaft journals 20 and 21 of the pivot shaft 14 in the manner described in more detail below, and the air jet assembly 5 is fixed on the holding device 13.

  The holding device 13 is shown in FIG. 3 and the support stand 22 is shown in FIG. 4, which corresponds to the other support stand 15. They are each shown in perspective.

  The shaft journal 21 forming part of the pivot shaft 14 has an outer contour 24, which is partly designed as a cylindrical surface 25 (see FIG. 1). This cylindrical surface 25 of the outer contour 24 is broken in secant form by two flat surfaces 26 and 27 arranged parallel to each other. Although it would be sufficient to provide only one flat surface, embodiments having two flat surfaces 26 and 27 are suitable for the purposes of the present invention.

  A bifurcated catch 28 of the holding device 13 is assigned to the shaft journals 20 and 21. The bifurcated capture 28 has a bifurcated base 29 that includes a hollow cylindrical complementary surface 30 that is adapted to the cylindrical surface 25. A catching part 32 of the holding device 13 is provided for the shaft journal 20 and a catching part 33 of the holding device 13 is provided for the other shaft journal 21, both shown catching parts 32 and 33 are in this embodiment. In the example, it is designed as a continuous bifurcated trap 28.

  The bifurcated trap 28 has an opening width x that is smaller than the diameter d of the cylindrical surface 25 but slightly larger than the distance y between the two flat surfaces 26 and 27. If there is only one flat surface 26, the distance y will be measured from this flat surface 26 to the cylindrical surface 25 of the outer contour 24.

  According to FIG. 4, a ring collar 31 for axially fixing the holding device 13 on the pivot shaft 14 is provided between the shaft journals 20 and 21 and the flanged regions of the respective support stands 15 and 22. It should be stated that

  The flat surfaces 26 and 27 of the pivot shaft 14 are such that the bifurcated catch 28 cannot be removed laterally from the pivot shaft 14 since the opening width x is smaller than the diameter d in the operating position according to FIG. Located at. If the air jet assembly 5 is to be removed from the pivot shaft 14 along with the retainer 13, the mouth opening of the bifurcated catch 28 will be on the flat surfaces 26 and 27 as shown in FIG. In order to be positioned in such a way that it can be removed in parallel, the air jet assembly 5 must first be swiveled at a predetermined swivel angle α according to FIG. Thus, FIG. 5 shows the disassembled position turned, while FIG. 6 shows the disassembled position.

  The air jet assembly 5 is swung from its operating position in a direction away from the delivery device 1, but for a maintenance process in which the air jet assembly 5 should not be disassembled, the swivel angle is purposely described above. Should be smaller than the turning angle α.

Figure 2 is a partial cross-sectional side view of the device according to the present invention in an operating position; FIG. 2 is a diagram of the device in the direction of arrow II in FIG. 1. FIG. 2 is a perspective view of a holding device applied to the device according to FIG. 1. It is a perspective view of the support stand containing the turning axis arrange | positioned at a holding | maintenance apparatus. FIG. 2 is a view similar to FIG. 1 but in which the air jet assembly is swung away from the device from its operating position to a disassembled position. FIG. 6 is the view as shown in FIG. 5 after the air jet assembly has been removed laterally from the pivot axis along with its holding device.

Claims (6)

  An apparatus for producing spun yarn from staple fiber strands, comprising an air jet assembly disposed downstream of a delivery device for staple fiber strands, the air jet assembly being disposed on a holding device; In this holding device that can be swung around the swivel axis together with the air jet assembly in a direction away from the delivery device, the holding device (13) and swivel shaft (14) are connected to Characterized in that it can be removed laterally from the pivot axis (14) after having been swung with a predetermined swivel angle (α) together with the jet assembly (5) apparatus.   2. A device according to claim 1, characterized in that the pivot axis (14) comprises two axis journals (20, 21), which are each arranged on their own support stand (15, 22).   The pivot (14) includes and retains an outer contour (24) that is partially designed as a cylindrical surface (25) that is broken in a secant manner by at least one flat surface (26, 27). A hollow cylindrical complementary surface (30) provided with a device (13) by a bifurcated catch (28), the bifurcated catch adapted to a cylindrical surface (25) on its bifurcated base (29). Where the capture (28) is smaller than the diameter (d) of the cylindrical surface (25) but from the distance (y) to the outer contour (24) of the pivot axis (14) of the flat surface (26) Device according to claim 1 or 2, characterized in that it has a large opening width (x).   The cylindrical surface (25) of the outer contour (24) is broken in secant form by two flat surfaces (26, 27) arranged parallel to each other, and the distance (y 4) The device according to claim 3, characterized in that it is slightly smaller than the opening width (x) of the bifurcated catch (28).   The stopper (17) for fixing in the operating position is arranged on the air jet assembly (5) at a distance from the pivot axis (14). Equipment.   6. Device according to claim 5, characterized in that the stopper (17) or the support surface (19) of the air jet assembly (5) arranged on it comprises a magnet (18).

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